From: Linus Walleij <linusw@kernel.org>
To: Alan Stern <stern@rowland.harvard.edu>,
Daniel Palmer <daniel@thingy.jp>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Philipp Zabel <p.zabel@pengutronix.de>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Linus Walleij <linusw@kernel.org>
Subject: [PATCH v3 5/6] usb: fotg210: use the common EHCI core
Date: Thu, 03 Sep 2026 23:17:42 +0200 [thread overview]
Message-ID: <20260903-gemini-usb-fotg2-v3-5-dd92ecf5675b@kernel.org> (raw)
In-Reply-To: <20260903-gemini-usb-fotg2-v3-0-dd92ecf5675b@kernel.org>
Replace the private EHCI fork with an hc_driver built from the common
EHCI implementation. Configure the FOTG210 register, root-hub TT,
speed-reporting, port-reset, and Gemini timing quirks through the new
hooks.
Keep role selection fixed at probe time, while cleaning up clock/reset
handling, interrupt masks, Gemini syscon setup, VBUS sequencing, probe
failures, shutdown, and system sleep. Device trees without dr_mode
retain their historical host default.
Suggested-by: Daniel Palmer <daniel@thingy.jp>
Assisted-by: LLM
Signed-off-by: Linus Walleij <linusw@kernel.org>
---
drivers/usb/fotg210/Kconfig | 5 +
drivers/usb/fotg210/fotg210-core.c | 274 +-
drivers/usb/fotg210/fotg210-hcd.c | 5672 +-----------------------------------
drivers/usb/fotg210/fotg210-hcd.h | 689 -----
drivers/usb/fotg210/fotg210.h | 26 +-
5 files changed, 339 insertions(+), 6327 deletions(-)
diff --git a/drivers/usb/fotg210/Kconfig b/drivers/usb/fotg210/Kconfig
index 87a16258274e..2c6e76faac64 100644
--- a/drivers/usb/fotg210/Kconfig
+++ b/drivers/usb/fotg210/Kconfig
@@ -16,6 +16,11 @@ if USB_FOTG210
config USB_FOTG210_HCD
bool "Faraday FOTG210 USB Host Controller support"
depends on USB=y || USB=USB_FOTG210
+ depends on USB_EHCI_HCD
+ select USB_EHCI_DEVIANT_PORT_STATUS_REG
+ select USB_EHCI_PORT_RESET_HOOKS
+ select USB_EHCI_PORT_SPEED_HOOK
+ select USB_EHCI_ROOT_HUB_TT
help
Faraday FOTG210 is an OTG controller which can be configured as
an USB2.0 host. It is designed to meet USB2.0 EHCI specification
diff --git a/drivers/usb/fotg210/fotg210-core.c b/drivers/usb/fotg210/fotg210-core.c
index 7fb4d4715e9f..7976bdae5f07 100644
--- a/drivers/usb/fotg210/fotg210-core.c
+++ b/drivers/usb/fotg210/fotg210-core.c
@@ -1,37 +1,50 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * Central probing code for the FOTG210 dual role driver
- * We register one driver for the hardware and then we decide
- * whether to proceed with probing the host or the peripheral
- * driver.
+ * Central probing code for the FOTG210 dual-role controller.
+ *
+ * The role is selected once at probe time. The driver does not attempt to
+ * switch between the host and peripheral blocks while it is running.
*/
-#include <linux/bitops.h>
+#include <linux/bits.h>
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/regmap.h>
+#include <linux/reset.h>
#include <linux/string_choices.h>
#include <linux/usb.h>
+#include <linux/usb/hcd.h>
#include <linux/usb/otg.h>
#include "fotg210.h"
-/* Role Register 0x80 */
-#define FOTG210_RR 0x80
-#define FOTG210_RR_ID BIT(21) /* 1 = B-device, 0 = A-device */
-#define FOTG210_RR_CROLE BIT(20) /* 1 = device, 0 = host */
+/* OTG control/status register. */
+#define FOTG210_OTGCSR 0x80
+#define FOTG210_OTGCSR_ID BIT(21)
+#define FOTG210_OTGCSR_CROLE BIT(20)
+#define FOTG210_OTGCSR_A_VBUS_VLD BIT(19)
+#define FOTG210_OTGCSR_A_BUS_DROP BIT(5)
+#define FOTG210_OTGCSR_A_BUS_REQ BIT(4)
+#define FOTG210_OTGCSR_B_HNP_EN BIT(1)
-/*
- * Gemini-specific initialization function, only executed on the
- * Gemini SoC using the global misc control register.
- *
- * The gemini USB blocks are connected to either Mini-A (host mode) or
- * Mini-B (peripheral mode) plugs. There is no role switch support on the
- * Gemini SoC, just either-or.
- */
+/* OTG interrupt status and enable registers. */
+#define FOTG210_OTGISR 0x84
+#define FOTG210_OTGIEN 0x88
+
+/* Global interrupt mask register; set bits mask the corresponding source. */
+#define FOTG210_GINTM 0xc4
+#define FOTG210_GINTM_INT_POLARITY BIT(3)
+#define FOTG210_GINTM_MHC_INT BIT(2)
+#define FOTG210_GINTM_MOTG_INT BIT(1)
+#define FOTG210_GINTM_MDEV_INT BIT(0)
+
+/* Gemini global miscellaneous-control register. */
#define GEMINI_GLOBAL_MISC_CTRL 0x30
#define GEMINI_MISC_USB0_WAKEUP BIT(14)
#define GEMINI_MISC_USB1_WAKEUP BIT(15)
@@ -40,94 +53,133 @@
#define GEMINI_MISC_USB0_MINI_B BIT(29)
#define GEMINI_MISC_USB1_MINI_B BIT(30)
-static int fotg210_gemini_init(struct fotg210 *fotg, struct resource *res,
- enum usb_dr_mode mode)
+static int fotg210_gemini_init(struct fotg210 *fotg)
{
struct device *dev = fotg->dev;
struct device_node *np = dev->of_node;
- struct regmap *map;
- bool wakeup;
+ bool wakeup = of_property_read_bool(np, "wakeup-source");
u32 mask, val;
int ret;
- map = syscon_regmap_lookup_by_phandle(np, "syscon");
- if (IS_ERR(map))
- return dev_err_probe(dev, PTR_ERR(map), "no syscon\n");
- fotg->map = map;
- wakeup = of_property_read_bool(np, "wakeup-source");
-
- /*
- * Figure out if this is USB0 or USB1 by simply checking the
- * physical base address.
- */
- mask = 0;
- if (res->start == 0x69000000) {
+ fotg->map = syscon_regmap_lookup_by_phandle(np, "syscon");
+ if (IS_ERR(fotg->map))
+ return dev_err_probe(dev, PTR_ERR(fotg->map), "no syscon\n");
+
+ if (fotg->res->start == 0x69000000) {
fotg->port = GEMINI_PORT_1;
mask = GEMINI_MISC_USB1_VBUS_ON | GEMINI_MISC_USB1_MINI_B |
- GEMINI_MISC_USB1_WAKEUP;
- if (mode == USB_DR_MODE_HOST)
- val = GEMINI_MISC_USB1_VBUS_ON;
- else
- val = GEMINI_MISC_USB1_MINI_B;
+ GEMINI_MISC_USB1_WAKEUP;
+ val = fotg->mode == USB_DR_MODE_HOST ?
+ GEMINI_MISC_USB1_VBUS_ON : GEMINI_MISC_USB1_MINI_B;
if (wakeup)
val |= GEMINI_MISC_USB1_WAKEUP;
} else {
fotg->port = GEMINI_PORT_0;
mask = GEMINI_MISC_USB0_VBUS_ON | GEMINI_MISC_USB0_MINI_B |
- GEMINI_MISC_USB0_WAKEUP;
- if (mode == USB_DR_MODE_HOST)
- val = GEMINI_MISC_USB0_VBUS_ON;
- else
- val = GEMINI_MISC_USB0_MINI_B;
+ GEMINI_MISC_USB0_WAKEUP;
+ val = fotg->mode == USB_DR_MODE_HOST ?
+ GEMINI_MISC_USB0_VBUS_ON : GEMINI_MISC_USB0_MINI_B;
if (wakeup)
val |= GEMINI_MISC_USB0_WAKEUP;
}
- ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, mask, val);
- if (ret) {
- dev_err(dev, "failed to initialize Gemini PHY\n");
- return ret;
- }
+ ret = regmap_update_bits(fotg->map, GEMINI_GLOBAL_MISC_CTRL,
+ mask, val);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to initialize Gemini PHY\n");
dev_info(dev, "initialized Gemini PHY in %s mode\n",
- (mode == USB_DR_MODE_HOST) ? "host" : "gadget");
+ fotg->mode == USB_DR_MODE_HOST ? "host" : "gadget");
return 0;
}
/**
- * fotg210_vbus() - Called by gadget driver to enable/disable VBUS
- * @fotg: pointer to a private fotg210 object
- * @enable: true to enable VBUS, false to disable VBUS
+ * fotg210_vbus() - enable or disable the A-device VBUS supply
+ * @fotg: controller state
+ * @enable: whether to drive VBUS
*/
void fotg210_vbus(struct fotg210 *fotg, bool enable)
{
- u32 mask;
+ u32 mask = 0;
u32 val;
int ret;
+ val = readl(fotg->base + FOTG210_OTGCSR);
+ if (enable) {
+ val &= ~FOTG210_OTGCSR_A_BUS_DROP;
+ val |= FOTG210_OTGCSR_A_BUS_REQ;
+ } else {
+ val &= ~FOTG210_OTGCSR_A_BUS_REQ;
+ val |= FOTG210_OTGCSR_A_BUS_DROP;
+ }
+ writel(val, fotg->base + FOTG210_OTGCSR);
+
switch (fotg->port) {
case GEMINI_PORT_0:
mask = GEMINI_MISC_USB0_VBUS_ON;
- val = enable ? GEMINI_MISC_USB0_VBUS_ON : 0;
break;
case GEMINI_PORT_1:
mask = GEMINI_MISC_USB1_VBUS_ON;
- val = enable ? GEMINI_MISC_USB1_VBUS_ON : 0;
break;
- default:
- return;
+ case GEMINI_PORT_NONE:
+ break;
+ }
+
+ if (mask) {
+ ret = regmap_update_bits(fotg->map, GEMINI_GLOBAL_MISC_CTRL,
+ mask, enable ? mask : 0);
+ if (ret) {
+ dev_err(fotg->dev, "failed to %s VBUS\n",
+ str_enable_disable(enable));
+ return;
+ }
}
- ret = regmap_update_bits(fotg->map, GEMINI_GLOBAL_MISC_CTRL, mask, val);
+
+ ret = readl_poll_timeout(fotg->base + FOTG210_OTGCSR, val,
+ enable == !!(val & FOTG210_OTGCSR_A_VBUS_VLD),
+ 1000, 500000);
if (ret)
- dev_err(fotg->dev, "failed to %s VBUS\n",
- str_enable_disable(enable));
- dev_info(fotg->dev, "%s: %s VBUS\n", __func__, str_enable_disable(enable));
+ dev_warn(fotg->dev, "timeout waiting for VBUS to %s\n",
+ str_enable_disable(enable));
+}
+
+static void fotg210_init_host(struct fotg210 *fotg)
+{
+ u32 val;
+
+ /* This driver keeps a fixed A-host role and does not negotiate HNP. */
+ val = readl(fotg->base + FOTG210_OTGCSR);
+ val &= ~FOTG210_OTGCSR_B_HNP_EN;
+ writel(val, fotg->base + FOTG210_OTGCSR);
+
+ /* Mask peripheral and OTG sources, enable the host source, active high. */
+ writel(FOTG210_GINTM_MDEV_INT | FOTG210_GINTM_MOTG_INT |
+ FOTG210_GINTM_INT_POLARITY, fotg->base + FOTG210_GINTM);
+ writel(0, fotg->base + FOTG210_OTGIEN);
+ writel(readl(fotg->base + FOTG210_OTGISR),
+ fotg->base + FOTG210_OTGISR);
+
+ /* Vendor trees cycle the A bus before starting the host controller. */
+ fotg210_vbus(fotg, false);
+ usleep_range(10000, 12000);
+ fotg210_vbus(fotg, true);
+ usleep_range(10000, 12000);
+}
+
+static void fotg210_init_peripheral(struct fotg210 *fotg)
+{
+ /* Mask host and OTG sources, enable the device source, active high. */
+ writel(FOTG210_GINTM_MHC_INT | FOTG210_GINTM_MOTG_INT |
+ FOTG210_GINTM_INT_POLARITY, fotg->base + FOTG210_GINTM);
+ writel(0, fotg->base + FOTG210_OTGIEN);
+ writel(readl(fotg->base + FOTG210_OTGISR),
+ fotg->base + FOTG210_OTGISR);
}
static int fotg210_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- enum usb_dr_mode mode;
+ struct reset_control *rst;
struct fotg210 *fotg;
u32 val;
int ret;
@@ -141,62 +193,110 @@ static int fotg210_probe(struct platform_device *pdev)
if (IS_ERR(fotg->base))
return PTR_ERR(fotg->base);
- fotg->pclk = devm_clk_get_optional_enabled(dev, "PCLK");
+ fotg->pclk = devm_clk_get_enabled(dev, "PCLK");
if (IS_ERR(fotg->pclk))
- return PTR_ERR(fotg->pclk);
+ return dev_err_probe(dev, PTR_ERR(fotg->pclk),
+ "failed to enable PCLK\n");
- mode = usb_get_dr_mode(dev);
+ rst = devm_reset_control_get_optional_exclusive(dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(dev, PTR_ERR(rst),
+ "failed to get reset\n");
+ ret = reset_control_reset(rst);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to reset controller\n");
+
+ val = readl(fotg->base + FOTG210_OTGCSR);
+ fotg->mode = usb_get_dr_mode(dev);
+ /* Keep the historical fixed-host default for old device trees. */
+ if (fotg->mode == USB_DR_MODE_UNKNOWN)
+ fotg->mode = USB_DR_MODE_HOST;
+ if (fotg->mode != USB_DR_MODE_HOST &&
+ fotg->mode != USB_DR_MODE_PERIPHERAL)
+ return dev_err_probe(dev, -EINVAL,
+ "dr_mode must select host or peripheral\n");
if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) {
- ret = fotg210_gemini_init(fotg, fotg->res, mode);
+ fotg->is_fotg210 = true;
+ ret = fotg210_gemini_init(fotg);
if (ret)
return ret;
+ } else if (of_device_is_compatible(dev->of_node, "faraday,fotg210")) {
+ fotg->is_fotg210 = true;
}
- val = readl(fotg->base + FOTG210_RR);
- if (mode == USB_DR_MODE_PERIPHERAL) {
- if (!(val & FOTG210_RR_CROLE))
- dev_err(dev, "block not in device role\n");
- ret = fotg210_udc_probe(pdev, fotg);
- } else {
- if (val & FOTG210_RR_CROLE)
- dev_err(dev, "block not in host role\n");
- ret = fotg210_hcd_probe(pdev, fotg);
+ if (fotg->mode == USB_DR_MODE_PERIPHERAL) {
+ if (!(val & FOTG210_OTGCSR_CROLE))
+ dev_warn(dev, "controller does not report device role\n");
+ if (!(val & FOTG210_OTGCSR_ID))
+ dev_warn(dev, "controller does not report B-device role\n");
+ fotg210_init_peripheral(fotg);
+ return fotg210_udc_probe(pdev, fotg);
}
+ if (val & FOTG210_OTGCSR_CROLE)
+ dev_warn(dev, "controller does not report host role\n");
+ if (val & FOTG210_OTGCSR_ID)
+ dev_warn(dev, "controller does not report A-device role\n");
+ fotg210_init_host(fotg);
+ ret = fotg210_hcd_probe(pdev, fotg);
+ if (ret)
+ fotg210_vbus(fotg, false);
+
return ret;
}
static void fotg210_remove(struct platform_device *pdev)
{
- struct device *dev = &pdev->dev;
- enum usb_dr_mode mode;
-
- mode = usb_get_dr_mode(dev);
-
- if (mode == USB_DR_MODE_PERIPHERAL)
+ /* The subdrivers own drvdata, so recover the fixed role from firmware. */
+ if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL)
fotg210_udc_remove(pdev);
else
fotg210_hcd_remove(pdev);
}
-#ifdef CONFIG_OF
+static void fotg210_shutdown(struct platform_device *pdev)
+{
+ if (usb_get_dr_mode(&pdev->dev) != USB_DR_MODE_PERIPHERAL)
+ usb_hcd_platform_shutdown(pdev);
+}
+
+static int fotg210_suspend(struct device *dev)
+{
+ if (usb_get_dr_mode(dev) == USB_DR_MODE_PERIPHERAL)
+ return 0;
+
+ return fotg210_hcd_suspend(dev);
+}
+
+static int fotg210_resume(struct device *dev)
+{
+ if (usb_get_dr_mode(dev) == USB_DR_MODE_PERIPHERAL)
+ return 0;
+
+ return fotg210_hcd_resume(dev);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(fotg210_pm_ops, fotg210_suspend,
+ fotg210_resume);
+
static const struct of_device_id fotg210_of_match[] = {
{ .compatible = "faraday,fotg200" },
{ .compatible = "faraday,fotg210" },
- /* TODO: can we also handle FUSB220? */
{},
};
MODULE_DEVICE_TABLE(of, fotg210_of_match);
-#endif
static struct platform_driver fotg210_driver = {
.driver = {
- .name = "fotg210",
- .of_match_table = of_match_ptr(fotg210_of_match),
+ .name = "fotg210",
+ .of_match_table = fotg210_of_match,
+ .pm = pm_sleep_ptr(&fotg210_pm_ops),
},
- .probe = fotg210_probe,
+ .probe = fotg210_probe,
.remove = fotg210_remove,
+ .shutdown = fotg210_shutdown,
};
static int __init fotg210_init(void)
diff --git a/drivers/usb/fotg210/fotg210-hcd.c b/drivers/usb/fotg210/fotg210-hcd.c
index 956be5b56510..0a36820f189b 100644
--- a/drivers/usb/fotg210/fotg210-hcd.c
+++ b/drivers/usb/fotg210/fotg210-hcd.c
@@ -1,5547 +1,127 @@
// SPDX-License-Identifier: GPL-2.0+
-/* Faraday FOTG210 EHCI-like driver
- *
- * Copyright (c) 2013 Faraday Technology Corporation
- *
- * Author: Yuan-Hsin Chen <yhchen@faraday-tech.com>
- * Feng-Hsin Chiang <john453@faraday-tech.com>
- * Po-Yu Chuang <ratbert.chuang@gmail.com>
- *
- * Most of code borrowed from the Linux-3.7 EHCI driver
- */
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/device.h>
-#include <linux/dmapool.h>
-#include <linux/kernel.h>
+/* Faraday FOTG210 EHCI driver */
+#include <linux/bits.h>
#include <linux/delay.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/vmalloc.h>
+#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/hrtimer.h>
-#include <linux/list.h>
#include <linux/interrupt.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-#include <linux/moduleparam.h>
-#include <linux/dma-mapping.h>
-#include <linux/debugfs.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/platform_device.h>
#include <linux/io.h>
-#include <linux/iopoll.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <linux/unaligned.h>
-
-#include "fotg210.h"
-
-static const char hcd_name[] = "fotg210_hcd";
-
-#undef FOTG210_URB_TRACE
-#define FOTG210_STATS
-
-/* magic numbers that can affect system performance */
-#define FOTG210_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */
-#define FOTG210_TUNE_RL_HS 4 /* nak throttle; see 4.9 */
-#define FOTG210_TUNE_RL_TT 0
-#define FOTG210_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */
-#define FOTG210_TUNE_MULT_TT 1
-
-/* Some drivers think it's safe to schedule isochronous transfers more than 256
- * ms into the future (partly as a result of an old bug in the scheduling
- * code). In an attempt to avoid trouble, we will use a minimum scheduling
- * length of 512 frames instead of 256.
- */
-#define FOTG210_TUNE_FLS 1 /* (medium) 512-frame schedule */
-
-/* Initial IRQ latency: faster than hw default */
-static int log2_irq_thresh; /* 0 to 6 */
-module_param(log2_irq_thresh, int, S_IRUGO);
-MODULE_PARM_DESC(log2_irq_thresh, "log2 IRQ latency, 1-64 microframes");
-
-/* initial park setting: slower than hw default */
-static unsigned park;
-module_param(park, uint, S_IRUGO);
-MODULE_PARM_DESC(park, "park setting; 1-3 back-to-back async packets");
-
-/* for link power management(LPM) feature */
-static unsigned int hird;
-module_param(hird, int, S_IRUGO);
-MODULE_PARM_DESC(hird, "host initiated resume duration, +1 for each 75us");
-
-#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
-
-#include "fotg210-hcd.h"
-
-#define fotg210_dbg(fotg210, fmt, args...) \
- dev_dbg(fotg210_to_hcd(fotg210)->self.controller, fmt, ## args)
-#define fotg210_err(fotg210, fmt, args...) \
- dev_err(fotg210_to_hcd(fotg210)->self.controller, fmt, ## args)
-#define fotg210_info(fotg210, fmt, args...) \
- dev_info(fotg210_to_hcd(fotg210)->self.controller, fmt, ## args)
-#define fotg210_warn(fotg210, fmt, args...) \
- dev_warn(fotg210_to_hcd(fotg210)->self.controller, fmt, ## args)
-
-/* check the values in the HCSPARAMS register (host controller _Structural_
- * parameters) see EHCI spec, Table 2-4 for each value
- */
-static void dbg_hcs_params(struct fotg210_hcd *fotg210, char *label)
-{
- u32 params = fotg210_readl(fotg210, &fotg210->caps->hcs_params);
-
- fotg210_dbg(fotg210, "%s hcs_params 0x%x ports=%d\n", label, params,
- HCS_N_PORTS(params));
-}
-
-/* check the values in the HCCPARAMS register (host controller _Capability_
- * parameters) see EHCI Spec, Table 2-5 for each value
- */
-static void dbg_hcc_params(struct fotg210_hcd *fotg210, char *label)
-{
- u32 params = fotg210_readl(fotg210, &fotg210->caps->hcc_params);
-
- fotg210_dbg(fotg210, "%s hcc_params %04x uframes %s%s\n", label,
- params,
- HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
- HCC_CANPARK(params) ? " park" : "");
-}
-
-static void __maybe_unused
-dbg_qtd(const char *label, struct fotg210_hcd *fotg210, struct fotg210_qtd *qtd)
-{
- fotg210_dbg(fotg210, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
- hc32_to_cpup(fotg210, &qtd->hw_next),
- hc32_to_cpup(fotg210, &qtd->hw_alt_next),
- hc32_to_cpup(fotg210, &qtd->hw_token),
- hc32_to_cpup(fotg210, &qtd->hw_buf[0]));
- if (qtd->hw_buf[1])
- fotg210_dbg(fotg210, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
- hc32_to_cpup(fotg210, &qtd->hw_buf[1]),
- hc32_to_cpup(fotg210, &qtd->hw_buf[2]),
- hc32_to_cpup(fotg210, &qtd->hw_buf[3]),
- hc32_to_cpup(fotg210, &qtd->hw_buf[4]));
-}
-
-static void __maybe_unused
-dbg_qh(const char *label, struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- struct fotg210_qh_hw *hw = qh->hw;
-
- fotg210_dbg(fotg210, "%s qh %p n%08x info %x %x qtd %x\n", label, qh,
- hw->hw_next, hw->hw_info1, hw->hw_info2,
- hw->hw_current);
-
- dbg_qtd("overlay", fotg210, (struct fotg210_qtd *) &hw->hw_qtd_next);
-}
-
-static void __maybe_unused
-dbg_itd(const char *label, struct fotg210_hcd *fotg210, struct fotg210_itd *itd)
-{
- fotg210_dbg(fotg210, "%s[%d] itd %p, next %08x, urb %p\n", label,
- itd->frame, itd, hc32_to_cpu(fotg210, itd->hw_next),
- itd->urb);
-
- fotg210_dbg(fotg210,
- " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
- hc32_to_cpu(fotg210, itd->hw_transaction[0]),
- hc32_to_cpu(fotg210, itd->hw_transaction[1]),
- hc32_to_cpu(fotg210, itd->hw_transaction[2]),
- hc32_to_cpu(fotg210, itd->hw_transaction[3]),
- hc32_to_cpu(fotg210, itd->hw_transaction[4]),
- hc32_to_cpu(fotg210, itd->hw_transaction[5]),
- hc32_to_cpu(fotg210, itd->hw_transaction[6]),
- hc32_to_cpu(fotg210, itd->hw_transaction[7]));
-
- fotg210_dbg(fotg210,
- " buf: %08x %08x %08x %08x %08x %08x %08x\n",
- hc32_to_cpu(fotg210, itd->hw_bufp[0]),
- hc32_to_cpu(fotg210, itd->hw_bufp[1]),
- hc32_to_cpu(fotg210, itd->hw_bufp[2]),
- hc32_to_cpu(fotg210, itd->hw_bufp[3]),
- hc32_to_cpu(fotg210, itd->hw_bufp[4]),
- hc32_to_cpu(fotg210, itd->hw_bufp[5]),
- hc32_to_cpu(fotg210, itd->hw_bufp[6]));
-
- fotg210_dbg(fotg210, " index: %d %d %d %d %d %d %d %d\n",
- itd->index[0], itd->index[1], itd->index[2],
- itd->index[3], itd->index[4], itd->index[5],
- itd->index[6], itd->index[7]);
-}
-
-static int __maybe_unused
-dbg_status_buf(char *buf, unsigned len, const char *label, u32 status)
-{
- return scnprintf(buf, len, "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
- label, label[0] ? " " : "", status,
- (status & STS_ASS) ? " Async" : "",
- (status & STS_PSS) ? " Periodic" : "",
- (status & STS_RECL) ? " Recl" : "",
- (status & STS_HALT) ? " Halt" : "",
- (status & STS_IAA) ? " IAA" : "",
- (status & STS_FATAL) ? " FATAL" : "",
- (status & STS_FLR) ? " FLR" : "",
- (status & STS_PCD) ? " PCD" : "",
- (status & STS_ERR) ? " ERR" : "",
- (status & STS_INT) ? " INT" : "");
-}
-
-static int __maybe_unused
-dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable)
-{
- return scnprintf(buf, len, "%s%sintrenable %02x%s%s%s%s%s%s",
- label, label[0] ? " " : "", enable,
- (enable & STS_IAA) ? " IAA" : "",
- (enable & STS_FATAL) ? " FATAL" : "",
- (enable & STS_FLR) ? " FLR" : "",
- (enable & STS_PCD) ? " PCD" : "",
- (enable & STS_ERR) ? " ERR" : "",
- (enable & STS_INT) ? " INT" : "");
-}
-
-static const char *const fls_strings[] = { "1024", "512", "256", "??" };
-
-static int dbg_command_buf(char *buf, unsigned len, const char *label,
- u32 command)
-{
- return scnprintf(buf, len,
- "%s%scommand %07x %s=%d ithresh=%d%s%s%s period=%s%s %s",
- label, label[0] ? " " : "", command,
- (command & CMD_PARK) ? " park" : "(park)",
- CMD_PARK_CNT(command),
- (command >> 16) & 0x3f,
- (command & CMD_IAAD) ? " IAAD" : "",
- (command & CMD_ASE) ? " Async" : "",
- (command & CMD_PSE) ? " Periodic" : "",
- fls_strings[(command >> 2) & 0x3],
- (command & CMD_RESET) ? " Reset" : "",
- (command & CMD_RUN) ? "RUN" : "HALT");
-}
-
-static char *dbg_port_buf(char *buf, unsigned len, const char *label, int port,
- u32 status)
-{
- char *sig;
-
- /* signaling state */
- switch (status & (3 << 10)) {
- case 0 << 10:
- sig = "se0";
- break;
- case 1 << 10:
- sig = "k";
- break; /* low speed */
- case 2 << 10:
- sig = "j";
- break;
- default:
- sig = "?";
- break;
- }
-
- scnprintf(buf, len, "%s%sport:%d status %06x %d sig=%s%s%s%s%s%s%s%s",
- label, label[0] ? " " : "", port, status,
- status >> 25, /*device address */
- sig,
- (status & PORT_RESET) ? " RESET" : "",
- (status & PORT_SUSPEND) ? " SUSPEND" : "",
- (status & PORT_RESUME) ? " RESUME" : "",
- (status & PORT_PEC) ? " PEC" : "",
- (status & PORT_PE) ? " PE" : "",
- (status & PORT_CSC) ? " CSC" : "",
- (status & PORT_CONNECT) ? " CONNECT" : "");
-
- return buf;
-}
-
-/* functions have the "wrong" filename when they're output... */
-#define dbg_status(fotg210, label, status) { \
- char _buf[80]; \
- dbg_status_buf(_buf, sizeof(_buf), label, status); \
- fotg210_dbg(fotg210, "%s\n", _buf); \
-}
-
-#define dbg_cmd(fotg210, label, command) { \
- char _buf[80]; \
- dbg_command_buf(_buf, sizeof(_buf), label, command); \
- fotg210_dbg(fotg210, "%s\n", _buf); \
-}
-
-#define dbg_port(fotg210, label, port, status) { \
- char _buf[80]; \
- fotg210_dbg(fotg210, "%s\n", \
- dbg_port_buf(_buf, sizeof(_buf), label, port, status));\
-}
-
-/* troubleshooting help: expose state in debugfs */
-static int debug_async_open(struct inode *, struct file *);
-static int debug_periodic_open(struct inode *, struct file *);
-static int debug_registers_open(struct inode *, struct file *);
-static int debug_async_open(struct inode *, struct file *);
-
-static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
-static int debug_close(struct inode *, struct file *);
-
-static const struct file_operations debug_async_fops = {
- .owner = THIS_MODULE,
- .open = debug_async_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-static const struct file_operations debug_periodic_fops = {
- .owner = THIS_MODULE,
- .open = debug_periodic_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-static const struct file_operations debug_registers_fops = {
- .owner = THIS_MODULE,
- .open = debug_registers_open,
- .read = debug_output,
- .release = debug_close,
- .llseek = default_llseek,
-};
-
-static struct dentry *fotg210_debug_root;
-
-struct debug_buffer {
- ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
- struct usb_bus *bus;
- struct mutex mutex; /* protect filling of buffer */
- size_t count; /* number of characters filled into buffer */
- char *output_buf;
- size_t alloc_size;
-};
-
-static inline char speed_char(u32 scratch)
-{
- switch (scratch & (3 << 12)) {
- case QH_FULL_SPEED:
- return 'f';
-
- case QH_LOW_SPEED:
- return 'l';
-
- case QH_HIGH_SPEED:
- return 'h';
-
- default:
- return '?';
- }
-}
-
-static inline char token_mark(struct fotg210_hcd *fotg210, __hc32 token)
-{
- __u32 v = hc32_to_cpu(fotg210, token);
-
- if (v & QTD_STS_ACTIVE)
- return '*';
- if (v & QTD_STS_HALT)
- return '-';
- if (!IS_SHORT_READ(v))
- return ' ';
- /* tries to advance through hw_alt_next */
- return '/';
-}
-
-static void qh_lines(struct fotg210_hcd *fotg210, struct fotg210_qh *qh,
- char **nextp, unsigned *sizep)
-{
- u32 scratch;
- u32 hw_curr;
- struct fotg210_qtd *td;
- unsigned temp;
- unsigned size = *sizep;
- char *next = *nextp;
- char mark;
- __le32 list_end = FOTG210_LIST_END(fotg210);
- struct fotg210_qh_hw *hw = qh->hw;
-
- if (hw->hw_qtd_next == list_end) /* NEC does this */
- mark = '@';
- else
- mark = token_mark(fotg210, hw->hw_token);
- if (mark == '/') { /* qh_alt_next controls qh advance? */
- if ((hw->hw_alt_next & QTD_MASK(fotg210)) ==
- fotg210->async->hw->hw_alt_next)
- mark = '#'; /* blocked */
- else if (hw->hw_alt_next == list_end)
- mark = '.'; /* use hw_qtd_next */
- /* else alt_next points to some other qtd */
- }
- scratch = hc32_to_cpup(fotg210, &hw->hw_info1);
- hw_curr = (mark == '*') ? hc32_to_cpup(fotg210, &hw->hw_current) : 0;
- temp = scnprintf(next, size,
- "qh/%p dev%d %cs ep%d %08x %08x(%08x%c %s nak%d)",
- qh, scratch & 0x007f,
- speed_char(scratch),
- (scratch >> 8) & 0x000f,
- scratch, hc32_to_cpup(fotg210, &hw->hw_info2),
- hc32_to_cpup(fotg210, &hw->hw_token), mark,
- (cpu_to_hc32(fotg210, QTD_TOGGLE) & hw->hw_token)
- ? "data1" : "data0",
- (hc32_to_cpup(fotg210, &hw->hw_alt_next) >> 1) & 0x0f);
- size -= temp;
- next += temp;
-
- /* hc may be modifying the list as we read it ... */
- list_for_each_entry(td, &qh->qtd_list, qtd_list) {
- scratch = hc32_to_cpup(fotg210, &td->hw_token);
- mark = ' ';
- if (hw_curr == td->qtd_dma)
- mark = '*';
- else if (hw->hw_qtd_next == cpu_to_hc32(fotg210, td->qtd_dma))
- mark = '+';
- else if (QTD_LENGTH(scratch)) {
- if (td->hw_alt_next == fotg210->async->hw->hw_alt_next)
- mark = '#';
- else if (td->hw_alt_next != list_end)
- mark = '/';
- }
- temp = scnprintf(next, size,
- "\n\t%p%c%s len=%d %08x urb %p",
- td, mark, ({ char *tmp;
- switch ((scratch>>8)&0x03) {
- case 0:
- tmp = "out";
- break;
- case 1:
- tmp = "in";
- break;
- case 2:
- tmp = "setup";
- break;
- default:
- tmp = "?";
- break;
- } tmp; }),
- (scratch >> 16) & 0x7fff,
- scratch,
- td->urb);
- size -= temp;
- next += temp;
- }
-
- temp = scnprintf(next, size, "\n");
-
- size -= temp;
- next += temp;
-
- *sizep = size;
- *nextp = next;
-}
-
-static ssize_t fill_async_buffer(struct debug_buffer *buf)
-{
- struct usb_hcd *hcd;
- struct fotg210_hcd *fotg210;
- unsigned long flags;
- unsigned temp, size;
- char *next;
- struct fotg210_qh *qh;
-
- hcd = bus_to_hcd(buf->bus);
- fotg210 = hcd_to_fotg210(hcd);
- next = buf->output_buf;
- size = buf->alloc_size;
-
- *next = 0;
-
- /* dumps a snapshot of the async schedule.
- * usually empty except for long-term bulk reads, or head.
- * one QH per line, and TDs we know about
- */
- spin_lock_irqsave(&fotg210->lock, flags);
- for (qh = fotg210->async->qh_next.qh; size > 0 && qh;
- qh = qh->qh_next.qh)
- qh_lines(fotg210, qh, &next, &size);
- if (fotg210->async_unlink && size > 0) {
- temp = scnprintf(next, size, "\nunlink =\n");
- size -= temp;
- next += temp;
-
- for (qh = fotg210->async_unlink; size > 0 && qh;
- qh = qh->unlink_next)
- qh_lines(fotg210, qh, &next, &size);
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
-
- return strlen(buf->output_buf);
-}
-
-/* count tds, get ep direction */
-static unsigned output_buf_tds_dir(char *buf, struct fotg210_hcd *fotg210,
- struct fotg210_qh_hw *hw, struct fotg210_qh *qh, unsigned size)
-{
- u32 scratch = hc32_to_cpup(fotg210, &hw->hw_info1);
- struct fotg210_qtd *qtd;
- char *type = "";
- unsigned temp = 0;
-
- /* count tds, get ep direction */
- list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
- temp++;
- switch ((hc32_to_cpu(fotg210, qtd->hw_token) >> 8) & 0x03) {
- case 0:
- type = "out";
- continue;
- case 1:
- type = "in";
- continue;
- }
- }
-
- return scnprintf(buf, size, "(%c%d ep%d%s [%d/%d] q%d p%d)",
- speed_char(scratch), scratch & 0x007f,
- (scratch >> 8) & 0x000f, type, qh->usecs,
- qh->c_usecs, temp, (scratch >> 16) & 0x7ff);
-}
-
-#define DBG_SCHED_LIMIT 64
-static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
-{
- struct usb_hcd *hcd;
- struct fotg210_hcd *fotg210;
- unsigned long flags;
- union fotg210_shadow p, *seen;
- unsigned temp, size, seen_count;
- char *next;
- unsigned i;
- __hc32 tag;
-
- seen = kmalloc_objs(*seen, DBG_SCHED_LIMIT, GFP_ATOMIC);
- if (!seen)
- return 0;
-
- seen_count = 0;
-
- hcd = bus_to_hcd(buf->bus);
- fotg210 = hcd_to_fotg210(hcd);
- next = buf->output_buf;
- size = buf->alloc_size;
-
- temp = scnprintf(next, size, "size = %d\n", fotg210->periodic_size);
- size -= temp;
- next += temp;
-
- /* dump a snapshot of the periodic schedule.
- * iso changes, interrupt usually doesn't.
- */
- spin_lock_irqsave(&fotg210->lock, flags);
- for (i = 0; i < fotg210->periodic_size; i++) {
- p = fotg210->pshadow[i];
- if (likely(!p.ptr))
- continue;
-
- tag = Q_NEXT_TYPE(fotg210, fotg210->periodic[i]);
-
- temp = scnprintf(next, size, "%4d: ", i);
- size -= temp;
- next += temp;
-
- do {
- struct fotg210_qh_hw *hw;
-
- switch (hc32_to_cpu(fotg210, tag)) {
- case Q_TYPE_QH:
- hw = p.qh->hw;
- temp = scnprintf(next, size, " qh%d-%04x/%p",
- p.qh->period,
- hc32_to_cpup(fotg210,
- &hw->hw_info2)
- /* uframe masks */
- & (QH_CMASK | QH_SMASK),
- p.qh);
- size -= temp;
- next += temp;
- /* don't repeat what follows this qh */
- for (temp = 0; temp < seen_count; temp++) {
- if (seen[temp].ptr != p.ptr)
- continue;
- if (p.qh->qh_next.ptr) {
- temp = scnprintf(next, size,
- " ...");
- size -= temp;
- next += temp;
- }
- break;
- }
- /* show more info the first time around */
- if (temp == seen_count) {
- temp = output_buf_tds_dir(next,
- fotg210, hw,
- p.qh, size);
-
- if (seen_count < DBG_SCHED_LIMIT)
- seen[seen_count++].qh = p.qh;
- } else
- temp = 0;
- tag = Q_NEXT_TYPE(fotg210, hw->hw_next);
- p = p.qh->qh_next;
- break;
- case Q_TYPE_FSTN:
- temp = scnprintf(next, size,
- " fstn-%8x/%p",
- p.fstn->hw_prev, p.fstn);
- tag = Q_NEXT_TYPE(fotg210, p.fstn->hw_next);
- p = p.fstn->fstn_next;
- break;
- case Q_TYPE_ITD:
- temp = scnprintf(next, size,
- " itd/%p", p.itd);
- tag = Q_NEXT_TYPE(fotg210, p.itd->hw_next);
- p = p.itd->itd_next;
- break;
- }
- size -= temp;
- next += temp;
- } while (p.ptr);
-
- temp = scnprintf(next, size, "\n");
- size -= temp;
- next += temp;
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
- kfree(seen);
-
- return buf->alloc_size - size;
-}
-#undef DBG_SCHED_LIMIT
-
-static const char *rh_state_string(struct fotg210_hcd *fotg210)
-{
- switch (fotg210->rh_state) {
- case FOTG210_RH_HALTED:
- return "halted";
- case FOTG210_RH_SUSPENDED:
- return "suspended";
- case FOTG210_RH_RUNNING:
- return "running";
- case FOTG210_RH_STOPPING:
- return "stopping";
- }
- return "?";
-}
-
-static ssize_t fill_registers_buffer(struct debug_buffer *buf)
-{
- struct usb_hcd *hcd;
- struct fotg210_hcd *fotg210;
- unsigned long flags;
- unsigned temp, size, i;
- char *next, scratch[80];
- static const char fmt[] = "%*s\n";
- static const char label[] = "";
-
- hcd = bus_to_hcd(buf->bus);
- fotg210 = hcd_to_fotg210(hcd);
- next = buf->output_buf;
- size = buf->alloc_size;
-
- spin_lock_irqsave(&fotg210->lock, flags);
-
- if (!HCD_HW_ACCESSIBLE(hcd)) {
- size = scnprintf(next, size,
- "bus %s, device %s\n"
- "%s\n"
- "SUSPENDED(no register access)\n",
- hcd->self.controller->bus->name,
- dev_name(hcd->self.controller),
- hcd->product_desc);
- goto done;
- }
-
- /* Capability Registers */
- i = HC_VERSION(fotg210, fotg210_readl(fotg210,
- &fotg210->caps->hc_capbase));
- temp = scnprintf(next, size,
- "bus %s, device %s\n"
- "%s\n"
- "EHCI %x.%02x, rh state %s\n",
- hcd->self.controller->bus->name,
- dev_name(hcd->self.controller),
- hcd->product_desc,
- i >> 8, i & 0x0ff, rh_state_string(fotg210));
- size -= temp;
- next += temp;
-
- /* FIXME interpret both types of params */
- i = fotg210_readl(fotg210, &fotg210->caps->hcs_params);
- temp = scnprintf(next, size, "structural params 0x%08x\n", i);
- size -= temp;
- next += temp;
-
- i = fotg210_readl(fotg210, &fotg210->caps->hcc_params);
- temp = scnprintf(next, size, "capability params 0x%08x\n", i);
- size -= temp;
- next += temp;
-
- /* Operational Registers */
- temp = dbg_status_buf(scratch, sizeof(scratch), label,
- fotg210_readl(fotg210, &fotg210->regs->status));
- temp = scnprintf(next, size, fmt, temp, scratch);
- size -= temp;
- next += temp;
-
- temp = dbg_command_buf(scratch, sizeof(scratch), label,
- fotg210_readl(fotg210, &fotg210->regs->command));
- temp = scnprintf(next, size, fmt, temp, scratch);
- size -= temp;
- next += temp;
-
- temp = dbg_intr_buf(scratch, sizeof(scratch), label,
- fotg210_readl(fotg210, &fotg210->regs->intr_enable));
- temp = scnprintf(next, size, fmt, temp, scratch);
- size -= temp;
- next += temp;
-
- temp = scnprintf(next, size, "uframe %04x\n",
- fotg210_read_frame_index(fotg210));
- size -= temp;
- next += temp;
-
- if (fotg210->async_unlink) {
- temp = scnprintf(next, size, "async unlink qh %p\n",
- fotg210->async_unlink);
- size -= temp;
- next += temp;
- }
-
-#ifdef FOTG210_STATS
- temp = scnprintf(next, size,
- "irq normal %ld err %ld iaa %ld(lost %ld)\n",
- fotg210->stats.normal, fotg210->stats.error,
- fotg210->stats.iaa, fotg210->stats.lost_iaa);
- size -= temp;
- next += temp;
-
- temp = scnprintf(next, size, "complete %ld unlink %ld\n",
- fotg210->stats.complete, fotg210->stats.unlink);
- size -= temp;
- next += temp;
-#endif
-
-done:
- spin_unlock_irqrestore(&fotg210->lock, flags);
-
- return buf->alloc_size - size;
-}
-
-static struct debug_buffer
-*alloc_buffer(struct usb_bus *bus, ssize_t (*fill_func)(struct debug_buffer *))
-{
- struct debug_buffer *buf;
-
- buf = kzalloc_obj(struct debug_buffer);
-
- if (buf) {
- buf->bus = bus;
- buf->fill_func = fill_func;
- mutex_init(&buf->mutex);
- buf->alloc_size = PAGE_SIZE;
- }
-
- return buf;
-}
-
-static int fill_buffer(struct debug_buffer *buf)
-{
- int ret = 0;
-
- if (!buf->output_buf)
- buf->output_buf = vmalloc(buf->alloc_size);
-
- if (!buf->output_buf) {
- ret = -ENOMEM;
- goto out;
- }
-
- ret = buf->fill_func(buf);
-
- if (ret >= 0) {
- buf->count = ret;
- ret = 0;
- }
-
-out:
- return ret;
-}
-
-static ssize_t debug_output(struct file *file, char __user *user_buf,
- size_t len, loff_t *offset)
-{
- struct debug_buffer *buf = file->private_data;
- int ret = 0;
-
- mutex_lock(&buf->mutex);
- if (buf->count == 0) {
- ret = fill_buffer(buf);
- if (ret != 0) {
- mutex_unlock(&buf->mutex);
- goto out;
- }
- }
- mutex_unlock(&buf->mutex);
-
- ret = simple_read_from_buffer(user_buf, len, offset,
- buf->output_buf, buf->count);
-
-out:
- return ret;
-
-}
-
-static int debug_close(struct inode *inode, struct file *file)
-{
- struct debug_buffer *buf = file->private_data;
-
- if (buf) {
- vfree(buf->output_buf);
- kfree(buf);
- }
-
- return 0;
-}
-static int debug_async_open(struct inode *inode, struct file *file)
-{
- file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
-
- return file->private_data ? 0 : -ENOMEM;
-}
-
-static int debug_periodic_open(struct inode *inode, struct file *file)
-{
- struct debug_buffer *buf;
-
- buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
- if (!buf)
- return -ENOMEM;
-
- buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
- file->private_data = buf;
- return 0;
-}
-
-static int debug_registers_open(struct inode *inode, struct file *file)
-{
- file->private_data = alloc_buffer(inode->i_private,
- fill_registers_buffer);
-
- return file->private_data ? 0 : -ENOMEM;
-}
-
-static inline void create_debug_files(struct fotg210_hcd *fotg210)
-{
- struct usb_bus *bus = &fotg210_to_hcd(fotg210)->self;
- struct dentry *root;
-
- root = debugfs_create_dir(bus->bus_name, fotg210_debug_root);
-
- debugfs_create_file("async", S_IRUGO, root, bus, &debug_async_fops);
- debugfs_create_file("periodic", S_IRUGO, root, bus,
- &debug_periodic_fops);
- debugfs_create_file("registers", S_IRUGO, root, bus,
- &debug_registers_fops);
-}
-
-static inline void remove_debug_files(struct fotg210_hcd *fotg210)
-{
- struct usb_bus *bus = &fotg210_to_hcd(fotg210)->self;
-
- debugfs_lookup_and_remove(bus->bus_name, fotg210_debug_root);
-}
-
-/* handshake - spin reading hc until handshake completes or fails
- * @ptr: address of hc register to be read
- * @mask: bits to look at in result of read
- * @done: value of those bits when handshake succeeds
- * @usec: timeout in microseconds
- *
- * Returns negative errno, or zero on success
- *
- * Success happens when the "mask" bits have the specified value (hardware
- * handshake done). There are two failure modes: "usec" have passed (major
- * hardware flakeout), or the register reads as all-ones (hardware removed).
- *
- * That last failure should_only happen in cases like physical cardbus eject
- * before driver shutdown. But it also seems to be caused by bugs in cardbus
- * bridge shutdown: shutting down the bridge before the devices using it.
- */
-static int handshake(struct fotg210_hcd *fotg210, void __iomem *ptr,
- u32 mask, u32 done, int usec)
-{
- u32 result;
- int ret;
-
- ret = readl_poll_timeout_atomic(ptr, result,
- ((result & mask) == done ||
- result == U32_MAX), 1, usec);
- if (result == U32_MAX) /* card removed */
- return -ENODEV;
-
- return ret;
-}
-
-/* Force HC to halt state from unknown (EHCI spec section 2.3).
- * Must be called with interrupts enabled and the lock not held.
- */
-static int fotg210_halt(struct fotg210_hcd *fotg210)
-{
- u32 temp;
-
- spin_lock_irq(&fotg210->lock);
-
- /* disable any irqs left enabled by previous code */
- fotg210_writel(fotg210, 0, &fotg210->regs->intr_enable);
-
- /*
- * This routine gets called during probe before fotg210->command
- * has been initialized, so we can't rely on its value.
- */
- fotg210->command &= ~CMD_RUN;
- temp = fotg210_readl(fotg210, &fotg210->regs->command);
- temp &= ~(CMD_RUN | CMD_IAAD);
- fotg210_writel(fotg210, temp, &fotg210->regs->command);
-
- spin_unlock_irq(&fotg210->lock);
- synchronize_irq(fotg210_to_hcd(fotg210)->irq);
-
- return handshake(fotg210, &fotg210->regs->status,
- STS_HALT, STS_HALT, 16 * 125);
-}
-
-/* Reset a non-running (STS_HALT == 1) controller.
- * Must be called with interrupts enabled and the lock not held.
- */
-static int fotg210_reset(struct fotg210_hcd *fotg210)
-{
- int retval;
- u32 command = fotg210_readl(fotg210, &fotg210->regs->command);
-
- /* If the EHCI debug controller is active, special care must be
- * taken before and after a host controller reset
- */
- if (fotg210->debug && !dbgp_reset_prep(fotg210_to_hcd(fotg210)))
- fotg210->debug = NULL;
-
- command |= CMD_RESET;
- dbg_cmd(fotg210, "reset", command);
- fotg210_writel(fotg210, command, &fotg210->regs->command);
- fotg210->rh_state = FOTG210_RH_HALTED;
- fotg210->next_statechange = jiffies;
- retval = handshake(fotg210, &fotg210->regs->command,
- CMD_RESET, 0, 250 * 1000);
-
- if (retval)
- return retval;
-
- if (fotg210->debug)
- dbgp_external_startup(fotg210_to_hcd(fotg210));
-
- fotg210->port_c_suspend = fotg210->suspended_ports =
- fotg210->resuming_ports = 0;
- return retval;
-}
-
-/* Idle the controller (turn off the schedules).
- * Must be called with interrupts enabled and the lock not held.
- */
-static void fotg210_quiesce(struct fotg210_hcd *fotg210)
-{
- u32 temp;
-
- if (fotg210->rh_state != FOTG210_RH_RUNNING)
- return;
-
- /* wait for any schedule enables/disables to take effect */
- temp = (fotg210->command << 10) & (STS_ASS | STS_PSS);
- handshake(fotg210, &fotg210->regs->status, STS_ASS | STS_PSS, temp,
- 16 * 125);
-
- /* then disable anything that's still active */
- spin_lock_irq(&fotg210->lock);
- fotg210->command &= ~(CMD_ASE | CMD_PSE);
- fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
- spin_unlock_irq(&fotg210->lock);
-
- /* hardware can take 16 microframes to turn off ... */
- handshake(fotg210, &fotg210->regs->status, STS_ASS | STS_PSS, 0,
- 16 * 125);
-}
-
-static void end_unlink_async(struct fotg210_hcd *fotg210);
-static void unlink_empty_async(struct fotg210_hcd *fotg210);
-static void fotg210_work(struct fotg210_hcd *fotg210);
-static void start_unlink_intr(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh);
-static void end_unlink_intr(struct fotg210_hcd *fotg210, struct fotg210_qh *qh);
-
-/* Set a bit in the USBCMD register */
-static void fotg210_set_command_bit(struct fotg210_hcd *fotg210, u32 bit)
-{
- fotg210->command |= bit;
- fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
-
- /* unblock posted write */
- fotg210_readl(fotg210, &fotg210->regs->command);
-}
-
-/* Clear a bit in the USBCMD register */
-static void fotg210_clear_command_bit(struct fotg210_hcd *fotg210, u32 bit)
-{
- fotg210->command &= ~bit;
- fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
-
- /* unblock posted write */
- fotg210_readl(fotg210, &fotg210->regs->command);
-}
-
-/* EHCI timer support... Now using hrtimers.
- *
- * Lots of different events are triggered from fotg210->hrtimer. Whenever
- * the timer routine runs, it checks each possible event; events that are
- * currently enabled and whose expiration time has passed get handled.
- * The set of enabled events is stored as a collection of bitflags in
- * fotg210->enabled_hrtimer_events, and they are numbered in order of
- * increasing delay values (ranging between 1 ms and 100 ms).
- *
- * Rather than implementing a sorted list or tree of all pending events,
- * we keep track only of the lowest-numbered pending event, in
- * fotg210->next_hrtimer_event. Whenever fotg210->hrtimer gets restarted, its
- * expiration time is set to the timeout value for this event.
- *
- * As a result, events might not get handled right away; the actual delay
- * could be anywhere up to twice the requested delay. This doesn't
- * matter, because none of the events are especially time-critical. The
- * ones that matter most all have a delay of 1 ms, so they will be
- * handled after 2 ms at most, which is okay. In addition to this, we
- * allow for an expiration range of 1 ms.
- */
-
-/* Delay lengths for the hrtimer event types.
- * Keep this list sorted by delay length, in the same order as
- * the event types indexed by enum fotg210_hrtimer_event in fotg210.h.
- */
-static unsigned event_delays_ns[] = {
- 1 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_POLL_ASS */
- 1 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_POLL_PSS */
- 1 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_POLL_DEAD */
- 1125 * NSEC_PER_USEC, /* FOTG210_HRTIMER_UNLINK_INTR */
- 2 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_FREE_ITDS */
- 6 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_ASYNC_UNLINKS */
- 10 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_IAA_WATCHDOG */
- 10 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_DISABLE_PERIODIC */
- 15 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_DISABLE_ASYNC */
- 100 * NSEC_PER_MSEC, /* FOTG210_HRTIMER_IO_WATCHDOG */
-};
-
-/* Enable a pending hrtimer event */
-static void fotg210_enable_event(struct fotg210_hcd *fotg210, unsigned event,
- bool resched)
-{
- ktime_t *timeout = &fotg210->hr_timeouts[event];
-
- if (resched)
- *timeout = ktime_add(ktime_get(), event_delays_ns[event]);
- fotg210->enabled_hrtimer_events |= (1 << event);
-
- /* Track only the lowest-numbered pending event */
- if (event < fotg210->next_hrtimer_event) {
- fotg210->next_hrtimer_event = event;
- hrtimer_start_range_ns(&fotg210->hrtimer, *timeout,
- NSEC_PER_MSEC, HRTIMER_MODE_ABS);
- }
-}
-
-
-/* Poll the STS_ASS status bit; see when it agrees with CMD_ASE */
-static void fotg210_poll_ASS(struct fotg210_hcd *fotg210)
-{
- unsigned actual, want;
-
- /* Don't enable anything if the controller isn't running (e.g., died) */
- if (fotg210->rh_state != FOTG210_RH_RUNNING)
- return;
-
- want = (fotg210->command & CMD_ASE) ? STS_ASS : 0;
- actual = fotg210_readl(fotg210, &fotg210->regs->status) & STS_ASS;
-
- if (want != actual) {
-
- /* Poll again later, but give up after about 20 ms */
- if (fotg210->ASS_poll_count++ < 20) {
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_POLL_ASS,
- true);
- return;
- }
- fotg210_dbg(fotg210, "Waited too long for the async schedule status (%x/%x), giving up\n",
- want, actual);
- }
- fotg210->ASS_poll_count = 0;
-
- /* The status is up-to-date; restart or stop the schedule as needed */
- if (want == 0) { /* Stopped */
- if (fotg210->async_count > 0)
- fotg210_set_command_bit(fotg210, CMD_ASE);
-
- } else { /* Running */
- if (fotg210->async_count == 0) {
-
- /* Turn off the schedule after a while */
- fotg210_enable_event(fotg210,
- FOTG210_HRTIMER_DISABLE_ASYNC,
- true);
- }
- }
-}
-
-/* Turn off the async schedule after a brief delay */
-static void fotg210_disable_ASE(struct fotg210_hcd *fotg210)
-{
- fotg210_clear_command_bit(fotg210, CMD_ASE);
-}
-
-
-/* Poll the STS_PSS status bit; see when it agrees with CMD_PSE */
-static void fotg210_poll_PSS(struct fotg210_hcd *fotg210)
-{
- unsigned actual, want;
-
- /* Don't do anything if the controller isn't running (e.g., died) */
- if (fotg210->rh_state != FOTG210_RH_RUNNING)
- return;
-
- want = (fotg210->command & CMD_PSE) ? STS_PSS : 0;
- actual = fotg210_readl(fotg210, &fotg210->regs->status) & STS_PSS;
-
- if (want != actual) {
-
- /* Poll again later, but give up after about 20 ms */
- if (fotg210->PSS_poll_count++ < 20) {
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_POLL_PSS,
- true);
- return;
- }
- fotg210_dbg(fotg210, "Waited too long for the periodic schedule status (%x/%x), giving up\n",
- want, actual);
- }
- fotg210->PSS_poll_count = 0;
-
- /* The status is up-to-date; restart or stop the schedule as needed */
- if (want == 0) { /* Stopped */
- if (fotg210->periodic_count > 0)
- fotg210_set_command_bit(fotg210, CMD_PSE);
-
- } else { /* Running */
- if (fotg210->periodic_count == 0) {
-
- /* Turn off the schedule after a while */
- fotg210_enable_event(fotg210,
- FOTG210_HRTIMER_DISABLE_PERIODIC,
- true);
- }
- }
-}
-
-/* Turn off the periodic schedule after a brief delay */
-static void fotg210_disable_PSE(struct fotg210_hcd *fotg210)
-{
- fotg210_clear_command_bit(fotg210, CMD_PSE);
-}
-
-
-/* Poll the STS_HALT status bit; see when a dead controller stops */
-static void fotg210_handle_controller_death(struct fotg210_hcd *fotg210)
-{
- if (!(fotg210_readl(fotg210, &fotg210->regs->status) & STS_HALT)) {
-
- /* Give up after a few milliseconds */
- if (fotg210->died_poll_count++ < 5) {
- /* Try again later */
- fotg210_enable_event(fotg210,
- FOTG210_HRTIMER_POLL_DEAD, true);
- return;
- }
- fotg210_warn(fotg210, "Waited too long for the controller to stop, giving up\n");
- }
-
- /* Clean up the mess */
- fotg210->rh_state = FOTG210_RH_HALTED;
- fotg210_writel(fotg210, 0, &fotg210->regs->intr_enable);
- fotg210_work(fotg210);
- end_unlink_async(fotg210);
-
- /* Not in process context, so don't try to reset the controller */
-}
-
-
-/* Handle unlinked interrupt QHs once they are gone from the hardware */
-static void fotg210_handle_intr_unlinks(struct fotg210_hcd *fotg210)
-{
- bool stopped = (fotg210->rh_state < FOTG210_RH_RUNNING);
-
- /*
- * Process all the QHs on the intr_unlink list that were added
- * before the current unlink cycle began. The list is in
- * temporal order, so stop when we reach the first entry in the
- * current cycle. But if the root hub isn't running then
- * process all the QHs on the list.
- */
- fotg210->intr_unlinking = true;
- while (fotg210->intr_unlink) {
- struct fotg210_qh *qh = fotg210->intr_unlink;
-
- if (!stopped && qh->unlink_cycle == fotg210->intr_unlink_cycle)
- break;
- fotg210->intr_unlink = qh->unlink_next;
- qh->unlink_next = NULL;
- end_unlink_intr(fotg210, qh);
- }
-
- /* Handle remaining entries later */
- if (fotg210->intr_unlink) {
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_UNLINK_INTR,
- true);
- ++fotg210->intr_unlink_cycle;
- }
- fotg210->intr_unlinking = false;
-}
-
-
-/* Start another free-iTDs/siTDs cycle */
-static void start_free_itds(struct fotg210_hcd *fotg210)
-{
- if (!(fotg210->enabled_hrtimer_events &
- BIT(FOTG210_HRTIMER_FREE_ITDS))) {
- fotg210->last_itd_to_free = list_entry(
- fotg210->cached_itd_list.prev,
- struct fotg210_itd, itd_list);
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_FREE_ITDS, true);
- }
-}
-
-/* Wait for controller to stop using old iTDs and siTDs */
-static void end_free_itds(struct fotg210_hcd *fotg210)
-{
- struct fotg210_itd *itd, *n;
-
- if (fotg210->rh_state < FOTG210_RH_RUNNING)
- fotg210->last_itd_to_free = NULL;
-
- list_for_each_entry_safe(itd, n, &fotg210->cached_itd_list, itd_list) {
- list_del(&itd->itd_list);
- dma_pool_free(fotg210->itd_pool, itd, itd->itd_dma);
- if (itd == fotg210->last_itd_to_free)
- break;
- }
-
- if (!list_empty(&fotg210->cached_itd_list))
- start_free_itds(fotg210);
-}
-
-
-/* Handle lost (or very late) IAA interrupts */
-static void fotg210_iaa_watchdog(struct fotg210_hcd *fotg210)
-{
- if (fotg210->rh_state != FOTG210_RH_RUNNING)
- return;
-
- /*
- * Lost IAA irqs wedge things badly; seen first with a vt8235.
- * So we need this watchdog, but must protect it against both
- * (a) SMP races against real IAA firing and retriggering, and
- * (b) clean HC shutdown, when IAA watchdog was pending.
- */
- if (fotg210->async_iaa) {
- u32 cmd, status;
-
- /* If we get here, IAA is *REALLY* late. It's barely
- * conceivable that the system is so busy that CMD_IAAD
- * is still legitimately set, so let's be sure it's
- * clear before we read STS_IAA. (The HC should clear
- * CMD_IAAD when it sets STS_IAA.)
- */
- cmd = fotg210_readl(fotg210, &fotg210->regs->command);
-
- /*
- * If IAA is set here it either legitimately triggered
- * after the watchdog timer expired (_way_ late, so we'll
- * still count it as lost) ... or a silicon erratum:
- * - VIA seems to set IAA without triggering the IRQ;
- * - IAAD potentially cleared without setting IAA.
- */
- status = fotg210_readl(fotg210, &fotg210->regs->status);
- if ((status & STS_IAA) || !(cmd & CMD_IAAD)) {
- INCR(fotg210->stats.lost_iaa);
- fotg210_writel(fotg210, STS_IAA,
- &fotg210->regs->status);
- }
-
- fotg210_dbg(fotg210, "IAA watchdog: status %x cmd %x\n",
- status, cmd);
- end_unlink_async(fotg210);
- }
-}
-
-
-/* Enable the I/O watchdog, if appropriate */
-static void turn_on_io_watchdog(struct fotg210_hcd *fotg210)
-{
- /* Not needed if the controller isn't running or it's already enabled */
- if (fotg210->rh_state != FOTG210_RH_RUNNING ||
- (fotg210->enabled_hrtimer_events &
- BIT(FOTG210_HRTIMER_IO_WATCHDOG)))
- return;
-
- /*
- * Isochronous transfers always need the watchdog.
- * For other sorts we use it only if the flag is set.
- */
- if (fotg210->isoc_count > 0 || (fotg210->need_io_watchdog &&
- fotg210->async_count + fotg210->intr_count > 0))
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_IO_WATCHDOG,
- true);
-}
-
-
-/* Handler functions for the hrtimer event types.
- * Keep this array in the same order as the event types indexed by
- * enum fotg210_hrtimer_event in fotg210.h.
- */
-static void (*event_handlers[])(struct fotg210_hcd *) = {
- fotg210_poll_ASS, /* FOTG210_HRTIMER_POLL_ASS */
- fotg210_poll_PSS, /* FOTG210_HRTIMER_POLL_PSS */
- fotg210_handle_controller_death, /* FOTG210_HRTIMER_POLL_DEAD */
- fotg210_handle_intr_unlinks, /* FOTG210_HRTIMER_UNLINK_INTR */
- end_free_itds, /* FOTG210_HRTIMER_FREE_ITDS */
- unlink_empty_async, /* FOTG210_HRTIMER_ASYNC_UNLINKS */
- fotg210_iaa_watchdog, /* FOTG210_HRTIMER_IAA_WATCHDOG */
- fotg210_disable_PSE, /* FOTG210_HRTIMER_DISABLE_PERIODIC */
- fotg210_disable_ASE, /* FOTG210_HRTIMER_DISABLE_ASYNC */
- fotg210_work, /* FOTG210_HRTIMER_IO_WATCHDOG */
-};
-
-static enum hrtimer_restart fotg210_hrtimer_func(struct hrtimer *t)
-{
- struct fotg210_hcd *fotg210 =
- container_of(t, struct fotg210_hcd, hrtimer);
- ktime_t now;
- unsigned long events;
- unsigned long flags;
- unsigned e;
-
- spin_lock_irqsave(&fotg210->lock, flags);
-
- events = fotg210->enabled_hrtimer_events;
- fotg210->enabled_hrtimer_events = 0;
- fotg210->next_hrtimer_event = FOTG210_HRTIMER_NO_EVENT;
-
- /*
- * Check each pending event. If its time has expired, handle
- * the event; otherwise re-enable it.
- */
- now = ktime_get();
- for_each_set_bit(e, &events, FOTG210_HRTIMER_NUM_EVENTS) {
- if (ktime_compare(now, fotg210->hr_timeouts[e]) >= 0)
- event_handlers[e](fotg210);
- else
- fotg210_enable_event(fotg210, e, false);
- }
-
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return HRTIMER_NORESTART;
-}
-
-#define fotg210_bus_suspend NULL
-#define fotg210_bus_resume NULL
-
-static int check_reset_complete(struct fotg210_hcd *fotg210, int index,
- u32 __iomem *status_reg, int port_status)
-{
- if (!(port_status & PORT_CONNECT))
- return port_status;
-
- /* if reset finished and it's still not enabled -- handoff */
- if (!(port_status & PORT_PE))
- /* with integrated TT, there's nobody to hand it to! */
- fotg210_dbg(fotg210, "Failed to enable port %d on root hub TT\n",
- index + 1);
- else
- fotg210_dbg(fotg210, "port %d reset complete, port enabled\n",
- index + 1);
-
- return port_status;
-}
-
-
-/* build "status change" packet (one or two bytes) from HC registers */
-
-static int fotg210_hub_status_data(struct usb_hcd *hcd, char *buf)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- u32 temp, status;
- u32 mask;
- int retval = 1;
- unsigned long flags;
-
- /* init status to no-changes */
- buf[0] = 0;
-
- /* Inform the core about resumes-in-progress by returning
- * a non-zero value even if there are no status changes.
- */
- status = fotg210->resuming_ports;
-
- mask = PORT_CSC | PORT_PEC;
- /* PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND */
-
- /* no hub change reports (bit 0) for now (power, ...) */
-
- /* port N changes (bit N)? */
- spin_lock_irqsave(&fotg210->lock, flags);
-
- temp = fotg210_readl(fotg210, &fotg210->regs->port_status);
-
- /*
- * Return status information even for ports with OWNER set.
- * Otherwise hub_wq wouldn't see the disconnect event when a
- * high-speed device is switched over to the companion
- * controller by the user.
- */
-
- if ((temp & mask) != 0 || test_bit(0, &fotg210->port_c_suspend) ||
- (fotg210->reset_done[0] &&
- time_after_eq(jiffies, fotg210->reset_done[0]))) {
- buf[0] |= 1 << 1;
- status = STS_PCD;
- }
- /* FIXME autosuspend idle root hubs */
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return status ? retval : 0;
-}
-
-static void fotg210_hub_descriptor(struct fotg210_hcd *fotg210,
- struct usb_hub_descriptor *desc)
-{
- int ports = HCS_N_PORTS(fotg210->hcs_params);
- u16 temp;
-
- desc->bDescriptorType = USB_DT_HUB;
- desc->bPwrOn2PwrGood = 10; /* fotg210 1.0, 2.3.9 says 20ms max */
- desc->bHubContrCurrent = 0;
-
- desc->bNbrPorts = ports;
- temp = 1 + (ports / 8);
- desc->bDescLength = 7 + 2 * temp;
-
- /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
- memset(&desc->u.hs.DeviceRemovable[0], 0, temp);
- memset(&desc->u.hs.DeviceRemovable[temp], 0xff, temp);
-
- temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
- temp |= HUB_CHAR_NO_LPSM; /* no power switching */
- desc->wHubCharacteristics = cpu_to_le16(temp);
-}
-
-static int fotg210_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
- u16 wIndex, char *buf, u16 wLength)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- int ports = HCS_N_PORTS(fotg210->hcs_params);
- u32 __iomem *status_reg = &fotg210->regs->port_status;
- u32 temp, temp1, status;
- unsigned long flags;
- int retval = 0;
- unsigned selector;
-
- /*
- * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
- * HCS_INDICATOR may say we can change LEDs to off/amber/green.
- * (track current state ourselves) ... blink for diagnostics,
- * power, "this is the one", etc. EHCI spec supports this.
- */
-
- spin_lock_irqsave(&fotg210->lock, flags);
- switch (typeReq) {
- case ClearHubFeature:
- switch (wValue) {
- case C_HUB_LOCAL_POWER:
- case C_HUB_OVER_CURRENT:
- /* no hub-wide feature/status flags */
- break;
- default:
- goto error;
- }
- break;
- case ClearPortFeature:
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
- temp = fotg210_readl(fotg210, status_reg);
- temp &= ~PORT_RWC_BITS;
-
- /*
- * Even if OWNER is set, so the port is owned by the
- * companion controller, hub_wq needs to be able to clear
- * the port-change status bits (especially
- * USB_PORT_STAT_C_CONNECTION).
- */
-
- switch (wValue) {
- case USB_PORT_FEAT_ENABLE:
- fotg210_writel(fotg210, temp & ~PORT_PE, status_reg);
- break;
- case USB_PORT_FEAT_C_ENABLE:
- fotg210_writel(fotg210, temp | PORT_PEC, status_reg);
- break;
- case USB_PORT_FEAT_SUSPEND:
- if (temp & PORT_RESET)
- goto error;
- if (!(temp & PORT_SUSPEND))
- break;
- if ((temp & PORT_PE) == 0)
- goto error;
-
- /* resume signaling for 20 msec */
- fotg210_writel(fotg210, temp | PORT_RESUME, status_reg);
- fotg210->reset_done[wIndex] = jiffies
- + msecs_to_jiffies(USB_RESUME_TIMEOUT);
- break;
- case USB_PORT_FEAT_C_SUSPEND:
- clear_bit(wIndex, &fotg210->port_c_suspend);
- break;
- case USB_PORT_FEAT_C_CONNECTION:
- fotg210_writel(fotg210, temp | PORT_CSC, status_reg);
- break;
- case USB_PORT_FEAT_C_OVER_CURRENT:
- fotg210_writel(fotg210, temp | OTGISR_OVC,
- &fotg210->regs->otgisr);
- break;
- case USB_PORT_FEAT_C_RESET:
- /* GetPortStatus clears reset */
- break;
- default:
- goto error;
- }
- fotg210_readl(fotg210, &fotg210->regs->command);
- break;
- case GetHubDescriptor:
- fotg210_hub_descriptor(fotg210, (struct usb_hub_descriptor *)
- buf);
- break;
- case GetHubStatus:
- /* no hub-wide feature/status flags */
- memset(buf, 0, 4);
- /*cpu_to_le32s ((u32 *) buf); */
- break;
- case GetPortStatus:
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
- status = 0;
- temp = fotg210_readl(fotg210, status_reg);
-
- /* wPortChange bits */
- if (temp & PORT_CSC)
- status |= USB_PORT_STAT_C_CONNECTION << 16;
- if (temp & PORT_PEC)
- status |= USB_PORT_STAT_C_ENABLE << 16;
-
- temp1 = fotg210_readl(fotg210, &fotg210->regs->otgisr);
- if (temp1 & OTGISR_OVC)
- status |= USB_PORT_STAT_C_OVERCURRENT << 16;
-
- /* whoever resumes must GetPortStatus to complete it!! */
- if (temp & PORT_RESUME) {
-
- /* Remote Wakeup received? */
- if (!fotg210->reset_done[wIndex]) {
- /* resume signaling for 20 msec */
- fotg210->reset_done[wIndex] = jiffies
- + msecs_to_jiffies(20);
- /* check the port again */
- mod_timer(&fotg210_to_hcd(fotg210)->rh_timer,
- fotg210->reset_done[wIndex]);
- }
-
- /* resume completed? */
- else if (time_after_eq(jiffies,
- fotg210->reset_done[wIndex])) {
- clear_bit(wIndex, &fotg210->suspended_ports);
- set_bit(wIndex, &fotg210->port_c_suspend);
- fotg210->reset_done[wIndex] = 0;
-
- /* stop resume signaling */
- temp = fotg210_readl(fotg210, status_reg);
- fotg210_writel(fotg210, temp &
- ~(PORT_RWC_BITS | PORT_RESUME),
- status_reg);
- clear_bit(wIndex, &fotg210->resuming_ports);
- retval = handshake(fotg210, status_reg,
- PORT_RESUME, 0, 2000);/* 2ms */
- if (retval != 0) {
- fotg210_err(fotg210,
- "port %d resume error %d\n",
- wIndex + 1, retval);
- goto error;
- }
- temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
- }
- }
-
- /* whoever resets must GetPortStatus to complete it!! */
- if ((temp & PORT_RESET) && time_after_eq(jiffies,
- fotg210->reset_done[wIndex])) {
- status |= USB_PORT_STAT_C_RESET << 16;
- fotg210->reset_done[wIndex] = 0;
- clear_bit(wIndex, &fotg210->resuming_ports);
-
- /* force reset to complete */
- fotg210_writel(fotg210,
- temp & ~(PORT_RWC_BITS | PORT_RESET),
- status_reg);
- /* REVISIT: some hardware needs 550+ usec to clear
- * this bit; seems too long to spin routinely...
- */
- retval = handshake(fotg210, status_reg,
- PORT_RESET, 0, 1000);
- if (retval != 0) {
- fotg210_err(fotg210, "port %d reset error %d\n",
- wIndex + 1, retval);
- goto error;
- }
-
- /* see what we found out */
- temp = check_reset_complete(fotg210, wIndex, status_reg,
- fotg210_readl(fotg210, status_reg));
-
- /* restart schedule */
- fotg210->command |= CMD_RUN;
- fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
- }
-
- if (!(temp & (PORT_RESUME|PORT_RESET))) {
- fotg210->reset_done[wIndex] = 0;
- clear_bit(wIndex, &fotg210->resuming_ports);
- }
-
- /* transfer dedicated ports to the companion hc */
- if ((temp & PORT_CONNECT) &&
- test_bit(wIndex, &fotg210->companion_ports)) {
- temp &= ~PORT_RWC_BITS;
- fotg210_writel(fotg210, temp, status_reg);
- fotg210_dbg(fotg210, "port %d --> companion\n",
- wIndex + 1);
- temp = fotg210_readl(fotg210, status_reg);
- }
-
- /*
- * Even if OWNER is set, there's no harm letting hub_wq
- * see the wPortStatus values (they should all be 0 except
- * for PORT_POWER anyway).
- */
-
- if (temp & PORT_CONNECT) {
- status |= USB_PORT_STAT_CONNECTION;
- status |= fotg210_port_speed(fotg210, temp);
- }
- if (temp & PORT_PE)
- status |= USB_PORT_STAT_ENABLE;
-
- /* maybe the port was unsuspended without our knowledge */
- if (temp & (PORT_SUSPEND|PORT_RESUME)) {
- status |= USB_PORT_STAT_SUSPEND;
- } else if (test_bit(wIndex, &fotg210->suspended_ports)) {
- clear_bit(wIndex, &fotg210->suspended_ports);
- clear_bit(wIndex, &fotg210->resuming_ports);
- fotg210->reset_done[wIndex] = 0;
- if (temp & PORT_PE)
- set_bit(wIndex, &fotg210->port_c_suspend);
- }
-
- temp1 = fotg210_readl(fotg210, &fotg210->regs->otgisr);
- if (temp1 & OTGISR_OVC)
- status |= USB_PORT_STAT_OVERCURRENT;
- if (temp & PORT_RESET)
- status |= USB_PORT_STAT_RESET;
- if (test_bit(wIndex, &fotg210->port_c_suspend))
- status |= USB_PORT_STAT_C_SUSPEND << 16;
-
- if (status & ~0xffff) /* only if wPortChange is interesting */
- dbg_port(fotg210, "GetStatus", wIndex + 1, temp);
- put_unaligned_le32(status, buf);
- break;
- case SetHubFeature:
- switch (wValue) {
- case C_HUB_LOCAL_POWER:
- case C_HUB_OVER_CURRENT:
- /* no hub-wide feature/status flags */
- break;
- default:
- goto error;
- }
- break;
- case SetPortFeature:
- selector = wIndex >> 8;
- wIndex &= 0xff;
-
- if (!wIndex || wIndex > ports)
- goto error;
- wIndex--;
- temp = fotg210_readl(fotg210, status_reg);
- temp &= ~PORT_RWC_BITS;
- switch (wValue) {
- case USB_PORT_FEAT_SUSPEND:
- if ((temp & PORT_PE) == 0
- || (temp & PORT_RESET) != 0)
- goto error;
-
- /* After above check the port must be connected.
- * Set appropriate bit thus could put phy into low power
- * mode if we have hostpc feature
- */
- fotg210_writel(fotg210, temp | PORT_SUSPEND,
- status_reg);
- set_bit(wIndex, &fotg210->suspended_ports);
- break;
- case USB_PORT_FEAT_RESET:
- if (temp & PORT_RESUME)
- goto error;
- /* line status bits may report this as low speed,
- * which can be fine if this root hub has a
- * transaction translator built in.
- */
- fotg210_dbg(fotg210, "port %d reset\n", wIndex + 1);
- temp |= PORT_RESET;
- temp &= ~PORT_PE;
-
- /*
- * caller must wait, then call GetPortStatus
- * usb 2.0 spec says 50 ms resets on root
- */
- fotg210->reset_done[wIndex] = jiffies
- + msecs_to_jiffies(50);
- fotg210_writel(fotg210, temp, status_reg);
- break;
-
- /* For downstream facing ports (these): one hub port is put
- * into test mode according to USB2 11.24.2.13, then the hub
- * must be reset (which for root hub now means rmmod+modprobe,
- * or else system reboot). See EHCI 2.3.9 and 4.14 for info
- * about the EHCI-specific stuff.
- */
- case USB_PORT_FEAT_TEST:
- if (!selector || selector > 5)
- goto error;
- spin_unlock_irqrestore(&fotg210->lock, flags);
- fotg210_quiesce(fotg210);
- spin_lock_irqsave(&fotg210->lock, flags);
-
- /* Put all enabled ports into suspend */
- temp = fotg210_readl(fotg210, status_reg) &
- ~PORT_RWC_BITS;
- if (temp & PORT_PE)
- fotg210_writel(fotg210, temp | PORT_SUSPEND,
- status_reg);
-
- spin_unlock_irqrestore(&fotg210->lock, flags);
- fotg210_halt(fotg210);
- spin_lock_irqsave(&fotg210->lock, flags);
-
- temp = fotg210_readl(fotg210, status_reg);
- temp |= selector << 16;
- fotg210_writel(fotg210, temp, status_reg);
- break;
-
- default:
- goto error;
- }
- fotg210_readl(fotg210, &fotg210->regs->command);
- break;
-
- default:
-error:
- /* "stall" on error */
- retval = -EPIPE;
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return retval;
-}
-
-static void __maybe_unused fotg210_relinquish_port(struct usb_hcd *hcd,
- int portnum)
-{
- return;
-}
-
-static int __maybe_unused fotg210_port_handed_over(struct usb_hcd *hcd,
- int portnum)
-{
- return 0;
-}
-
-/* There's basically three types of memory:
- * - data used only by the HCD ... kmalloc is fine
- * - async and periodic schedules, shared by HC and HCD ... these
- * need to use dma_pool or dma_alloc_coherent
- * - driver buffers, read/written by HC ... single shot DMA mapped
- *
- * There's also "register" data (e.g. PCI or SOC), which is memory mapped.
- * No memory seen by this driver is pageable.
- */
-
-/* Allocate the key transfer structures from the previously allocated pool */
-static inline void fotg210_qtd_init(struct fotg210_hcd *fotg210,
- struct fotg210_qtd *qtd, dma_addr_t dma)
-{
- memset(qtd, 0, sizeof(*qtd));
- qtd->qtd_dma = dma;
- qtd->hw_token = cpu_to_hc32(fotg210, QTD_STS_HALT);
- qtd->hw_next = FOTG210_LIST_END(fotg210);
- qtd->hw_alt_next = FOTG210_LIST_END(fotg210);
- INIT_LIST_HEAD(&qtd->qtd_list);
-}
-
-static struct fotg210_qtd *fotg210_qtd_alloc(struct fotg210_hcd *fotg210,
- gfp_t flags)
-{
- struct fotg210_qtd *qtd;
- dma_addr_t dma;
-
- qtd = dma_pool_alloc(fotg210->qtd_pool, flags, &dma);
- if (qtd != NULL)
- fotg210_qtd_init(fotg210, qtd, dma);
-
- return qtd;
-}
-
-static inline void fotg210_qtd_free(struct fotg210_hcd *fotg210,
- struct fotg210_qtd *qtd)
-{
- dma_pool_free(fotg210->qtd_pool, qtd, qtd->qtd_dma);
-}
-
-
-static void qh_destroy(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- /* clean qtds first, and know this is not linked */
- if (!list_empty(&qh->qtd_list) || qh->qh_next.ptr) {
- fotg210_dbg(fotg210, "unused qh not empty!\n");
- BUG();
- }
- if (qh->dummy)
- fotg210_qtd_free(fotg210, qh->dummy);
- dma_pool_free(fotg210->qh_pool, qh->hw, qh->qh_dma);
- kfree(qh);
-}
-
-static struct fotg210_qh *fotg210_qh_alloc(struct fotg210_hcd *fotg210,
- gfp_t flags)
-{
- struct fotg210_qh *qh;
- dma_addr_t dma;
-
- qh = kzalloc_obj(*qh, GFP_ATOMIC);
- if (!qh)
- goto done;
- qh->hw = (struct fotg210_qh_hw *)
- dma_pool_zalloc(fotg210->qh_pool, flags, &dma);
- if (!qh->hw)
- goto fail;
- qh->qh_dma = dma;
- INIT_LIST_HEAD(&qh->qtd_list);
-
- /* dummy td enables safe urb queuing */
- qh->dummy = fotg210_qtd_alloc(fotg210, flags);
- if (qh->dummy == NULL) {
- fotg210_dbg(fotg210, "no dummy td\n");
- goto fail1;
- }
-done:
- return qh;
-fail1:
- dma_pool_free(fotg210->qh_pool, qh->hw, qh->qh_dma);
-fail:
- kfree(qh);
- return NULL;
-}
-
-/* The queue heads and transfer descriptors are managed from pools tied
- * to each of the "per device" structures.
- * This is the initialisation and cleanup code.
- */
-
-static void fotg210_mem_cleanup(struct fotg210_hcd *fotg210)
-{
- if (fotg210->async)
- qh_destroy(fotg210, fotg210->async);
- fotg210->async = NULL;
-
- if (fotg210->dummy)
- qh_destroy(fotg210, fotg210->dummy);
- fotg210->dummy = NULL;
-
- /* DMA consistent memory and pools */
- dma_pool_destroy(fotg210->qtd_pool);
- fotg210->qtd_pool = NULL;
-
- dma_pool_destroy(fotg210->qh_pool);
- fotg210->qh_pool = NULL;
-
- dma_pool_destroy(fotg210->itd_pool);
- fotg210->itd_pool = NULL;
-
- if (fotg210->periodic)
- dma_free_coherent(fotg210_to_hcd(fotg210)->self.controller,
- fotg210->periodic_size * sizeof(u32),
- fotg210->periodic, fotg210->periodic_dma);
- fotg210->periodic = NULL;
-
- /* shadow periodic table */
- kfree(fotg210->pshadow);
- fotg210->pshadow = NULL;
-}
-
-/* remember to add cleanup code (above) if you add anything here */
-static int fotg210_mem_init(struct fotg210_hcd *fotg210, gfp_t flags)
-{
- int i;
-
- /* QTDs for control/bulk/intr transfers */
- fotg210->qtd_pool = dma_pool_create("fotg210_qtd",
- fotg210_to_hcd(fotg210)->self.controller,
- sizeof(struct fotg210_qtd),
- 32 /* byte alignment (for hw parts) */,
- 4096 /* can't cross 4K */);
- if (!fotg210->qtd_pool)
- goto fail;
-
- /* QHs for control/bulk/intr transfers */
- fotg210->qh_pool = dma_pool_create("fotg210_qh",
- fotg210_to_hcd(fotg210)->self.controller,
- sizeof(struct fotg210_qh_hw),
- 32 /* byte alignment (for hw parts) */,
- 4096 /* can't cross 4K */);
- if (!fotg210->qh_pool)
- goto fail;
-
- fotg210->async = fotg210_qh_alloc(fotg210, flags);
- if (!fotg210->async)
- goto fail;
-
- /* ITD for high speed ISO transfers */
- fotg210->itd_pool = dma_pool_create("fotg210_itd",
- fotg210_to_hcd(fotg210)->self.controller,
- sizeof(struct fotg210_itd),
- 64 /* byte alignment (for hw parts) */,
- 4096 /* can't cross 4K */);
- if (!fotg210->itd_pool)
- goto fail;
-
- /* Hardware periodic table */
- fotg210->periodic =
- dma_alloc_coherent(fotg210_to_hcd(fotg210)->self.controller,
- fotg210->periodic_size * sizeof(__le32),
- &fotg210->periodic_dma, 0);
- if (fotg210->periodic == NULL)
- goto fail;
-
- for (i = 0; i < fotg210->periodic_size; i++)
- fotg210->periodic[i] = FOTG210_LIST_END(fotg210);
-
- /* software shadow of hardware table */
- fotg210->pshadow = kcalloc(fotg210->periodic_size, sizeof(void *),
- flags);
- if (fotg210->pshadow != NULL)
- return 0;
-
-fail:
- fotg210_dbg(fotg210, "couldn't init memory\n");
- fotg210_mem_cleanup(fotg210);
- return -ENOMEM;
-}
-/* EHCI hardware queue manipulation ... the core. QH/QTD manipulation.
- *
- * Control, bulk, and interrupt traffic all use "qh" lists. They list "qtd"
- * entries describing USB transactions, max 16-20kB/entry (with 4kB-aligned
- * buffers needed for the larger number). We use one QH per endpoint, queue
- * multiple urbs (all three types) per endpoint. URBs may need several qtds.
- *
- * ISO traffic uses "ISO TD" (itd) records, and (along with
- * interrupts) needs careful scheduling. Performance improvements can be
- * an ongoing challenge. That's in "ehci-sched.c".
- *
- * USB 1.1 devices are handled (a) by "companion" OHCI or UHCI root hubs,
- * or otherwise through transaction translators (TTs) in USB 2.0 hubs using
- * (b) special fields in qh entries or (c) split iso entries. TTs will
- * buffer low/full speed data so the host collects it at high speed.
- */
-
-/* fill a qtd, returning how much of the buffer we were able to queue up */
-static int qtd_fill(struct fotg210_hcd *fotg210, struct fotg210_qtd *qtd,
- dma_addr_t buf, size_t len, int token, int maxpacket)
-{
- int i, count;
- u64 addr = buf;
-
- /* one buffer entry per 4K ... first might be short or unaligned */
- qtd->hw_buf[0] = cpu_to_hc32(fotg210, (u32)addr);
- qtd->hw_buf_hi[0] = cpu_to_hc32(fotg210, (u32)(addr >> 32));
- count = 0x1000 - (buf & 0x0fff); /* rest of that page */
- if (likely(len < count)) /* ... iff needed */
- count = len;
- else {
- buf += 0x1000;
- buf &= ~0x0fff;
-
- /* per-qtd limit: from 16K to 20K (best alignment) */
- for (i = 1; count < len && i < 5; i++) {
- addr = buf;
- qtd->hw_buf[i] = cpu_to_hc32(fotg210, (u32)addr);
- qtd->hw_buf_hi[i] = cpu_to_hc32(fotg210,
- (u32)(addr >> 32));
- buf += 0x1000;
- if ((count + 0x1000) < len)
- count += 0x1000;
- else
- count = len;
- }
-
- /* short packets may only terminate transfers */
- if (count != len)
- count -= (count % maxpacket);
- }
- qtd->hw_token = cpu_to_hc32(fotg210, (count << 16) | token);
- qtd->length = count;
-
- return count;
-}
-
-static inline void qh_update(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh, struct fotg210_qtd *qtd)
-{
- struct fotg210_qh_hw *hw = qh->hw;
-
- /* writes to an active overlay are unsafe */
- BUG_ON(qh->qh_state != QH_STATE_IDLE);
-
- hw->hw_qtd_next = QTD_NEXT(fotg210, qtd->qtd_dma);
- hw->hw_alt_next = FOTG210_LIST_END(fotg210);
-
- /* Except for control endpoints, we make hardware maintain data
- * toggle (like OHCI) ... here (re)initialize the toggle in the QH,
- * and set the pseudo-toggle in udev. Only usb_clear_halt() will
- * ever clear it.
- */
- if (!(hw->hw_info1 & cpu_to_hc32(fotg210, QH_TOGGLE_CTL))) {
- unsigned is_out, epnum;
-
- is_out = qh->is_out;
- epnum = (hc32_to_cpup(fotg210, &hw->hw_info1) >> 8) & 0x0f;
- if (unlikely(!usb_gettoggle(qh->dev, epnum, is_out))) {
- hw->hw_token &= ~cpu_to_hc32(fotg210, QTD_TOGGLE);
- usb_settoggle(qh->dev, epnum, is_out, 1);
- }
- }
-
- hw->hw_token &= cpu_to_hc32(fotg210, QTD_TOGGLE | QTD_STS_PING);
-}
-
-/* if it weren't for a common silicon quirk (writing the dummy into the qh
- * overlay, so qh->hw_token wrongly becomes inactive/halted), only fault
- * recovery (including urb dequeue) would need software changes to a QH...
- */
-static void qh_refresh(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- struct fotg210_qtd *qtd;
-
- if (list_empty(&qh->qtd_list))
- qtd = qh->dummy;
- else {
- qtd = list_entry(qh->qtd_list.next,
- struct fotg210_qtd, qtd_list);
- /*
- * first qtd may already be partially processed.
- * If we come here during unlink, the QH overlay region
- * might have reference to the just unlinked qtd. The
- * qtd is updated in qh_completions(). Update the QH
- * overlay here.
- */
- if (cpu_to_hc32(fotg210, qtd->qtd_dma) == qh->hw->hw_current) {
- qh->hw->hw_qtd_next = qtd->hw_next;
- qtd = NULL;
- }
- }
-
- if (qtd)
- qh_update(fotg210, qh, qtd);
-}
-
-static void qh_link_async(struct fotg210_hcd *fotg210, struct fotg210_qh *qh);
-
-static void fotg210_clear_tt_buffer_complete(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- struct fotg210_qh *qh = ep->hcpriv;
- unsigned long flags;
-
- spin_lock_irqsave(&fotg210->lock, flags);
- qh->clearing_tt = 0;
- if (qh->qh_state == QH_STATE_IDLE && !list_empty(&qh->qtd_list)
- && fotg210->rh_state == FOTG210_RH_RUNNING)
- qh_link_async(fotg210, qh);
- spin_unlock_irqrestore(&fotg210->lock, flags);
-}
-
-static void fotg210_clear_tt_buffer(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh, struct urb *urb, u32 token)
-{
-
- /* If an async split transaction gets an error or is unlinked,
- * the TT buffer may be left in an indeterminate state. We
- * have to clear the TT buffer.
- *
- * Note: this routine is never called for Isochronous transfers.
- */
- if (urb->dev->tt && !usb_pipeint(urb->pipe) && !qh->clearing_tt) {
- struct usb_device *tt = urb->dev->tt->hub;
-
- dev_dbg(&tt->dev,
- "clear tt buffer port %d, a%d ep%d t%08x\n",
- urb->dev->ttport, urb->dev->devnum,
- usb_pipeendpoint(urb->pipe), token);
-
- if (urb->dev->tt->hub !=
- fotg210_to_hcd(fotg210)->self.root_hub) {
- if (usb_hub_clear_tt_buffer(urb) == 0)
- qh->clearing_tt = 1;
- }
- }
-}
-
-static int qtd_copy_status(struct fotg210_hcd *fotg210, struct urb *urb,
- size_t length, u32 token)
-{
- int status = -EINPROGRESS;
-
- /* count IN/OUT bytes, not SETUP (even short packets) */
- if (likely(QTD_PID(token) != 2))
- urb->actual_length += length - QTD_LENGTH(token);
-
- /* don't modify error codes */
- if (unlikely(urb->unlinked))
- return status;
-
- /* force cleanup after short read; not always an error */
- if (unlikely(IS_SHORT_READ(token)))
- status = -EREMOTEIO;
-
- /* serious "can't proceed" faults reported by the hardware */
- if (token & QTD_STS_HALT) {
- if (token & QTD_STS_BABBLE) {
- /* FIXME "must" disable babbling device's port too */
- status = -EOVERFLOW;
- /* CERR nonzero + halt --> stall */
- } else if (QTD_CERR(token)) {
- status = -EPIPE;
-
- /* In theory, more than one of the following bits can be set
- * since they are sticky and the transaction is retried.
- * Which to test first is rather arbitrary.
- */
- } else if (token & QTD_STS_MMF) {
- /* fs/ls interrupt xfer missed the complete-split */
- status = -EPROTO;
- } else if (token & QTD_STS_DBE) {
- status = (QTD_PID(token) == 1) /* IN ? */
- ? -ENOSR /* hc couldn't read data */
- : -ECOMM; /* hc couldn't write data */
- } else if (token & QTD_STS_XACT) {
- /* timeout, bad CRC, wrong PID, etc */
- fotg210_dbg(fotg210, "devpath %s ep%d%s 3strikes\n",
- urb->dev->devpath,
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "in" : "out");
- status = -EPROTO;
- } else { /* unknown */
- status = -EPROTO;
- }
-
- fotg210_dbg(fotg210,
- "dev%d ep%d%s qtd token %08x --> status %d\n",
- usb_pipedevice(urb->pipe),
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "in" : "out",
- token, status);
- }
-
- return status;
-}
-
-static void fotg210_urb_done(struct fotg210_hcd *fotg210, struct urb *urb,
- int status)
-__releases(fotg210->lock)
-__acquires(fotg210->lock)
-{
- if (likely(urb->hcpriv != NULL)) {
- struct fotg210_qh *qh = (struct fotg210_qh *) urb->hcpriv;
-
- /* S-mask in a QH means it's an interrupt urb */
- if ((qh->hw->hw_info2 & cpu_to_hc32(fotg210, QH_SMASK)) != 0) {
-
- /* ... update hc-wide periodic stats (for usbfs) */
- fotg210_to_hcd(fotg210)->self.bandwidth_int_reqs--;
- }
- }
-
- if (unlikely(urb->unlinked)) {
- INCR(fotg210->stats.unlink);
- } else {
- /* report non-error and short read status as zero */
- if (status == -EINPROGRESS || status == -EREMOTEIO)
- status = 0;
- INCR(fotg210->stats.complete);
- }
-
-#ifdef FOTG210_URB_TRACE
- fotg210_dbg(fotg210,
- "%s %s urb %p ep%d%s status %d len %d/%d\n",
- __func__, urb->dev->devpath, urb,
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "in" : "out",
- status,
- urb->actual_length, urb->transfer_buffer_length);
-#endif
-
- /* complete() can reenter this HCD */
- usb_hcd_unlink_urb_from_ep(fotg210_to_hcd(fotg210), urb);
- spin_unlock(&fotg210->lock);
- usb_hcd_giveback_urb(fotg210_to_hcd(fotg210), urb, status);
- spin_lock(&fotg210->lock);
-}
-
-static int qh_schedule(struct fotg210_hcd *fotg210, struct fotg210_qh *qh);
-
-/* Process and free completed qtds for a qh, returning URBs to drivers.
- * Chases up to qh->hw_current. Returns number of completions called,
- * indicating how much "real" work we did.
- */
-static unsigned qh_completions(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh)
-{
- struct fotg210_qtd *last, *end = qh->dummy;
- struct fotg210_qtd *qtd, *tmp;
- int last_status;
- int stopped;
- unsigned count = 0;
- u8 state;
- struct fotg210_qh_hw *hw = qh->hw;
-
- if (unlikely(list_empty(&qh->qtd_list)))
- return count;
-
- /* completions (or tasks on other cpus) must never clobber HALT
- * till we've gone through and cleaned everything up, even when
- * they add urbs to this qh's queue or mark them for unlinking.
- *
- * NOTE: unlinking expects to be done in queue order.
- *
- * It's a bug for qh->qh_state to be anything other than
- * QH_STATE_IDLE, unless our caller is scan_async() or
- * scan_intr().
- */
- state = qh->qh_state;
- qh->qh_state = QH_STATE_COMPLETING;
- stopped = (state == QH_STATE_IDLE);
-
-rescan:
- last = NULL;
- last_status = -EINPROGRESS;
- qh->needs_rescan = 0;
-
- /* remove de-activated QTDs from front of queue.
- * after faults (including short reads), cleanup this urb
- * then let the queue advance.
- * if queue is stopped, handles unlinks.
- */
- list_for_each_entry_safe(qtd, tmp, &qh->qtd_list, qtd_list) {
- struct urb *urb;
- u32 token = 0;
-
- urb = qtd->urb;
-
- /* clean up any state from previous QTD ...*/
- if (last) {
- if (likely(last->urb != urb)) {
- fotg210_urb_done(fotg210, last->urb,
- last_status);
- count++;
- last_status = -EINPROGRESS;
- }
- fotg210_qtd_free(fotg210, last);
- last = NULL;
- }
-
- /* ignore urbs submitted during completions we reported */
- if (qtd == end)
- break;
-
- /* hardware copies qtd out of qh overlay */
- rmb();
- token = hc32_to_cpu(fotg210, qtd->hw_token);
-
- /* always clean up qtds the hc de-activated */
-retry_xacterr:
- if ((token & QTD_STS_ACTIVE) == 0) {
-
- /* Report Data Buffer Error: non-fatal but useful */
- if (token & QTD_STS_DBE)
- fotg210_dbg(fotg210,
- "detected DataBufferErr for urb %p ep%d%s len %d, qtd %p [qh %p]\n",
- urb, usb_endpoint_num(&urb->ep->desc),
- usb_endpoint_dir_in(&urb->ep->desc)
- ? "in" : "out",
- urb->transfer_buffer_length, qtd, qh);
-
- /* on STALL, error, and short reads this urb must
- * complete and all its qtds must be recycled.
- */
- if ((token & QTD_STS_HALT) != 0) {
-
- /* retry transaction errors until we
- * reach the software xacterr limit
- */
- if ((token & QTD_STS_XACT) &&
- QTD_CERR(token) == 0 &&
- ++qh->xacterrs < QH_XACTERR_MAX &&
- !urb->unlinked) {
- fotg210_dbg(fotg210,
- "detected XactErr len %zu/%zu retry %d\n",
- qtd->length - QTD_LENGTH(token),
- qtd->length,
- qh->xacterrs);
-
- /* reset the token in the qtd and the
- * qh overlay (which still contains
- * the qtd) so that we pick up from
- * where we left off
- */
- token &= ~QTD_STS_HALT;
- token |= QTD_STS_ACTIVE |
- (FOTG210_TUNE_CERR << 10);
- qtd->hw_token = cpu_to_hc32(fotg210,
- token);
- wmb();
- hw->hw_token = cpu_to_hc32(fotg210,
- token);
- goto retry_xacterr;
- }
- stopped = 1;
-
- /* magic dummy for some short reads; qh won't advance.
- * that silicon quirk can kick in with this dummy too.
- *
- * other short reads won't stop the queue, including
- * control transfers (status stage handles that) or
- * most other single-qtd reads ... the queue stops if
- * URB_SHORT_NOT_OK was set so the driver submitting
- * the urbs could clean it up.
- */
- } else if (IS_SHORT_READ(token) &&
- !(qtd->hw_alt_next &
- FOTG210_LIST_END(fotg210))) {
- stopped = 1;
- }
-
- /* stop scanning when we reach qtds the hc is using */
- } else if (likely(!stopped
- && fotg210->rh_state >= FOTG210_RH_RUNNING)) {
- break;
-
- /* scan the whole queue for unlinks whenever it stops */
- } else {
- stopped = 1;
-
- /* cancel everything if we halt, suspend, etc */
- if (fotg210->rh_state < FOTG210_RH_RUNNING)
- last_status = -ESHUTDOWN;
-
- /* this qtd is active; skip it unless a previous qtd
- * for its urb faulted, or its urb was canceled.
- */
- else if (last_status == -EINPROGRESS && !urb->unlinked)
- continue;
-
- /* qh unlinked; token in overlay may be most current */
- if (state == QH_STATE_IDLE &&
- cpu_to_hc32(fotg210, qtd->qtd_dma)
- == hw->hw_current) {
- token = hc32_to_cpu(fotg210, hw->hw_token);
-
- /* An unlink may leave an incomplete
- * async transaction in the TT buffer.
- * We have to clear it.
- */
- fotg210_clear_tt_buffer(fotg210, qh, urb,
- token);
- }
- }
-
- /* unless we already know the urb's status, collect qtd status
- * and update count of bytes transferred. in common short read
- * cases with only one data qtd (including control transfers),
- * queue processing won't halt. but with two or more qtds (for
- * example, with a 32 KB transfer), when the first qtd gets a
- * short read the second must be removed by hand.
- */
- if (last_status == -EINPROGRESS) {
- last_status = qtd_copy_status(fotg210, urb,
- qtd->length, token);
- if (last_status == -EREMOTEIO &&
- (qtd->hw_alt_next &
- FOTG210_LIST_END(fotg210)))
- last_status = -EINPROGRESS;
-
- /* As part of low/full-speed endpoint-halt processing
- * we must clear the TT buffer (11.17.5).
- */
- if (unlikely(last_status != -EINPROGRESS &&
- last_status != -EREMOTEIO)) {
- /* The TT's in some hubs malfunction when they
- * receive this request following a STALL (they
- * stop sending isochronous packets). Since a
- * STALL can't leave the TT buffer in a busy
- * state (if you believe Figures 11-48 - 11-51
- * in the USB 2.0 spec), we won't clear the TT
- * buffer in this case. Strictly speaking this
- * is a violation of the spec.
- */
- if (last_status != -EPIPE)
- fotg210_clear_tt_buffer(fotg210, qh,
- urb, token);
- }
- }
-
- /* if we're removing something not at the queue head,
- * patch the hardware queue pointer.
- */
- if (stopped && qtd->qtd_list.prev != &qh->qtd_list) {
- last = list_entry(qtd->qtd_list.prev,
- struct fotg210_qtd, qtd_list);
- last->hw_next = qtd->hw_next;
- }
-
- /* remove qtd; it's recycled after possible urb completion */
- list_del(&qtd->qtd_list);
- last = qtd;
-
- /* reinit the xacterr counter for the next qtd */
- qh->xacterrs = 0;
- }
-
- /* last urb's completion might still need calling */
- if (likely(last != NULL)) {
- fotg210_urb_done(fotg210, last->urb, last_status);
- count++;
- fotg210_qtd_free(fotg210, last);
- }
-
- /* Do we need to rescan for URBs dequeued during a giveback? */
- if (unlikely(qh->needs_rescan)) {
- /* If the QH is already unlinked, do the rescan now. */
- if (state == QH_STATE_IDLE)
- goto rescan;
-
- /* Otherwise we have to wait until the QH is fully unlinked.
- * Our caller will start an unlink if qh->needs_rescan is
- * set. But if an unlink has already started, nothing needs
- * to be done.
- */
- if (state != QH_STATE_LINKED)
- qh->needs_rescan = 0;
- }
-
- /* restore original state; caller must unlink or relink */
- qh->qh_state = state;
-
- /* be sure the hardware's done with the qh before refreshing
- * it after fault cleanup, or recovering from silicon wrongly
- * overlaying the dummy qtd (which reduces DMA chatter).
- */
- if (stopped != 0 || hw->hw_qtd_next == FOTG210_LIST_END(fotg210)) {
- switch (state) {
- case QH_STATE_IDLE:
- qh_refresh(fotg210, qh);
- break;
- case QH_STATE_LINKED:
- /* We won't refresh a QH that's linked (after the HC
- * stopped the queue). That avoids a race:
- * - HC reads first part of QH;
- * - CPU updates that first part and the token;
- * - HC reads rest of that QH, including token
- * Result: HC gets an inconsistent image, and then
- * DMAs to/from the wrong memory (corrupting it).
- *
- * That should be rare for interrupt transfers,
- * except maybe high bandwidth ...
- */
-
- /* Tell the caller to start an unlink */
- qh->needs_rescan = 1;
- break;
- /* otherwise, unlink already started */
- }
- }
-
- return count;
-}
-
-/* reverse of qh_urb_transaction: free a list of TDs.
- * used for cleanup after errors, before HC sees an URB's TDs.
- */
-static void qtd_list_free(struct fotg210_hcd *fotg210, struct urb *urb,
- struct list_head *head)
-{
- struct fotg210_qtd *qtd, *temp;
-
- list_for_each_entry_safe(qtd, temp, head, qtd_list) {
- list_del(&qtd->qtd_list);
- fotg210_qtd_free(fotg210, qtd);
- }
-}
-
-/* create a list of filled qtds for this URB; won't link into qh.
- */
-static struct list_head *qh_urb_transaction(struct fotg210_hcd *fotg210,
- struct urb *urb, struct list_head *head, gfp_t flags)
-{
- struct fotg210_qtd *qtd, *qtd_prev;
- dma_addr_t buf;
- int len, this_sg_len, maxpacket;
- int is_input;
- u32 token;
- int i;
- struct scatterlist *sg;
-
- /*
- * URBs map to sequences of QTDs: one logical transaction
- */
- qtd = fotg210_qtd_alloc(fotg210, flags);
- if (unlikely(!qtd))
- return NULL;
- list_add_tail(&qtd->qtd_list, head);
- qtd->urb = urb;
-
- token = QTD_STS_ACTIVE;
- token |= (FOTG210_TUNE_CERR << 10);
- /* for split transactions, SplitXState initialized to zero */
-
- len = urb->transfer_buffer_length;
- is_input = usb_pipein(urb->pipe);
- if (usb_pipecontrol(urb->pipe)) {
- /* SETUP pid */
- qtd_fill(fotg210, qtd, urb->setup_dma,
- sizeof(struct usb_ctrlrequest),
- token | (2 /* "setup" */ << 8), 8);
-
- /* ... and always at least one more pid */
- token ^= QTD_TOGGLE;
- qtd_prev = qtd;
- qtd = fotg210_qtd_alloc(fotg210, flags);
- if (unlikely(!qtd))
- goto cleanup;
- qtd->urb = urb;
- qtd_prev->hw_next = QTD_NEXT(fotg210, qtd->qtd_dma);
- list_add_tail(&qtd->qtd_list, head);
-
- /* for zero length DATA stages, STATUS is always IN */
- if (len == 0)
- token |= (1 /* "in" */ << 8);
- }
-
- /*
- * data transfer stage: buffer setup
- */
- i = urb->num_mapped_sgs;
- if (len > 0 && i > 0) {
- sg = urb->sg;
- buf = sg_dma_address(sg);
-
- /* urb->transfer_buffer_length may be smaller than the
- * size of the scatterlist (or vice versa)
- */
- this_sg_len = min_t(int, sg_dma_len(sg), len);
- } else {
- sg = NULL;
- buf = urb->transfer_dma;
- this_sg_len = len;
- }
-
- if (is_input)
- token |= (1 /* "in" */ << 8);
- /* else it's already initted to "out" pid (0 << 8) */
-
- maxpacket = usb_maxpacket(urb->dev, urb->pipe);
-
- /*
- * buffer gets wrapped in one or more qtds;
- * last one may be "short" (including zero len)
- * and may serve as a control status ack
- */
- for (;;) {
- int this_qtd_len;
-
- this_qtd_len = qtd_fill(fotg210, qtd, buf, this_sg_len, token,
- maxpacket);
- this_sg_len -= this_qtd_len;
- len -= this_qtd_len;
- buf += this_qtd_len;
-
- /*
- * short reads advance to a "magic" dummy instead of the next
- * qtd ... that forces the queue to stop, for manual cleanup.
- * (this will usually be overridden later.)
- */
- if (is_input)
- qtd->hw_alt_next = fotg210->async->hw->hw_alt_next;
-
- /* qh makes control packets use qtd toggle; maybe switch it */
- if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
- token ^= QTD_TOGGLE;
-
- if (likely(this_sg_len <= 0)) {
- if (--i <= 0 || len <= 0)
- break;
- sg = sg_next(sg);
- buf = sg_dma_address(sg);
- this_sg_len = min_t(int, sg_dma_len(sg), len);
- }
-
- qtd_prev = qtd;
- qtd = fotg210_qtd_alloc(fotg210, flags);
- if (unlikely(!qtd))
- goto cleanup;
- qtd->urb = urb;
- qtd_prev->hw_next = QTD_NEXT(fotg210, qtd->qtd_dma);
- list_add_tail(&qtd->qtd_list, head);
- }
-
- /*
- * unless the caller requires manual cleanup after short reads,
- * have the alt_next mechanism keep the queue running after the
- * last data qtd (the only one, for control and most other cases).
- */
- if (likely((urb->transfer_flags & URB_SHORT_NOT_OK) == 0 ||
- usb_pipecontrol(urb->pipe)))
- qtd->hw_alt_next = FOTG210_LIST_END(fotg210);
-
- /*
- * control requests may need a terminating data "status" ack;
- * other OUT ones may need a terminating short packet
- * (zero length).
- */
- if (likely(urb->transfer_buffer_length != 0)) {
- int one_more = 0;
-
- if (usb_pipecontrol(urb->pipe)) {
- one_more = 1;
- token ^= 0x0100; /* "in" <--> "out" */
- token |= QTD_TOGGLE; /* force DATA1 */
- } else if (usb_pipeout(urb->pipe)
- && (urb->transfer_flags & URB_ZERO_PACKET)
- && !(urb->transfer_buffer_length % maxpacket)) {
- one_more = 1;
- }
- if (one_more) {
- qtd_prev = qtd;
- qtd = fotg210_qtd_alloc(fotg210, flags);
- if (unlikely(!qtd))
- goto cleanup;
- qtd->urb = urb;
- qtd_prev->hw_next = QTD_NEXT(fotg210, qtd->qtd_dma);
- list_add_tail(&qtd->qtd_list, head);
-
- /* never any data in such packets */
- qtd_fill(fotg210, qtd, 0, 0, token, 0);
- }
- }
-
- /* by default, enable interrupt on urb completion */
- if (likely(!(urb->transfer_flags & URB_NO_INTERRUPT)))
- qtd->hw_token |= cpu_to_hc32(fotg210, QTD_IOC);
- return head;
-
-cleanup:
- qtd_list_free(fotg210, urb, head);
- return NULL;
-}
-
-/* Would be best to create all qh's from config descriptors,
- * when each interface/altsetting is established. Unlink
- * any previous qh and cancel its urbs first; endpoints are
- * implicitly reset then (data toggle too).
- * That'd mean updating how usbcore talks to HCDs. (2.7?)
- */
-
-
-/* Each QH holds a qtd list; a QH is used for everything except iso.
- *
- * For interrupt urbs, the scheduler must set the microframe scheduling
- * mask(s) each time the QH gets scheduled. For highspeed, that's
- * just one microframe in the s-mask. For split interrupt transactions
- * there are additional complications: c-mask, maybe FSTNs.
- */
-static struct fotg210_qh *qh_make(struct fotg210_hcd *fotg210, struct urb *urb,
- gfp_t flags)
-{
- struct fotg210_qh *qh = fotg210_qh_alloc(fotg210, flags);
- struct usb_host_endpoint *ep;
- u32 info1 = 0, info2 = 0;
- int is_input, type;
- int maxp = 0;
- int mult;
- struct usb_tt *tt = urb->dev->tt;
- struct fotg210_qh_hw *hw;
-
- if (!qh)
- return qh;
-
- /*
- * init endpoint/device data for this QH
- */
- info1 |= usb_pipeendpoint(urb->pipe) << 8;
- info1 |= usb_pipedevice(urb->pipe) << 0;
-
- is_input = usb_pipein(urb->pipe);
- type = usb_pipetype(urb->pipe);
- ep = usb_pipe_endpoint(urb->dev, urb->pipe);
- maxp = usb_endpoint_maxp(&ep->desc);
- mult = usb_endpoint_maxp_mult(&ep->desc);
-
- /* 1024 byte maxpacket is a hardware ceiling. High bandwidth
- * acts like up to 3KB, but is built from smaller packets.
- */
- if (maxp > 1024) {
- fotg210_dbg(fotg210, "bogus qh maxpacket %d\n", maxp);
- goto done;
- }
-
- /* Compute interrupt scheduling parameters just once, and save.
- * - allowing for high bandwidth, how many nsec/uframe are used?
- * - split transactions need a second CSPLIT uframe; same question
- * - splits also need a schedule gap (for full/low speed I/O)
- * - qh has a polling interval
- *
- * For control/bulk requests, the HC or TT handles these.
- */
- if (type == PIPE_INTERRUPT) {
- qh->usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH,
- is_input, 0, mult * maxp));
- qh->start = NO_FRAME;
-
- if (urb->dev->speed == USB_SPEED_HIGH) {
- qh->c_usecs = 0;
- qh->gap_uf = 0;
-
- qh->period = urb->interval >> 3;
- if (qh->period == 0 && urb->interval != 1) {
- /* NOTE interval 2 or 4 uframes could work.
- * But interval 1 scheduling is simpler, and
- * includes high bandwidth.
- */
- urb->interval = 1;
- } else if (qh->period > fotg210->periodic_size) {
- qh->period = fotg210->periodic_size;
- urb->interval = qh->period << 3;
- }
- } else {
- int think_time;
-
- /* gap is f(FS/LS transfer times) */
- qh->gap_uf = 1 + usb_calc_bus_time(urb->dev->speed,
- is_input, 0, maxp) / (125 * 1000);
-
- /* FIXME this just approximates SPLIT/CSPLIT times */
- if (is_input) { /* SPLIT, gap, CSPLIT+DATA */
- qh->c_usecs = qh->usecs + HS_USECS(0);
- qh->usecs = HS_USECS(1);
- } else { /* SPLIT+DATA, gap, CSPLIT */
- qh->usecs += HS_USECS(1);
- qh->c_usecs = HS_USECS(0);
- }
-
- think_time = tt ? tt->think_time : 0;
- qh->tt_usecs = NS_TO_US(think_time +
- usb_calc_bus_time(urb->dev->speed,
- is_input, 0, maxp));
- qh->period = urb->interval;
- if (qh->period > fotg210->periodic_size) {
- qh->period = fotg210->periodic_size;
- urb->interval = qh->period;
- }
- }
- }
-
- /* support for tt scheduling, and access to toggles */
- qh->dev = urb->dev;
-
- /* using TT? */
- switch (urb->dev->speed) {
- case USB_SPEED_LOW:
- info1 |= QH_LOW_SPEED;
- fallthrough;
-
- case USB_SPEED_FULL:
- /* EPS 0 means "full" */
- if (type != PIPE_INTERRUPT)
- info1 |= (FOTG210_TUNE_RL_TT << 28);
- if (type == PIPE_CONTROL) {
- info1 |= QH_CONTROL_EP; /* for TT */
- info1 |= QH_TOGGLE_CTL; /* toggle from qtd */
- }
- info1 |= maxp << 16;
-
- info2 |= (FOTG210_TUNE_MULT_TT << 30);
-
- /* Some Freescale processors have an erratum in which the
- * port number in the queue head was 0..N-1 instead of 1..N.
- */
- if (fotg210_has_fsl_portno_bug(fotg210))
- info2 |= (urb->dev->ttport-1) << 23;
- else
- info2 |= urb->dev->ttport << 23;
-
- /* set the address of the TT; for TDI's integrated
- * root hub tt, leave it zeroed.
- */
- if (tt && tt->hub != fotg210_to_hcd(fotg210)->self.root_hub)
- info2 |= tt->hub->devnum << 16;
-
- /* NOTE: if (PIPE_INTERRUPT) { scheduler sets c-mask } */
-
- break;
-
- case USB_SPEED_HIGH: /* no TT involved */
- info1 |= QH_HIGH_SPEED;
- if (type == PIPE_CONTROL) {
- info1 |= (FOTG210_TUNE_RL_HS << 28);
- info1 |= 64 << 16; /* usb2 fixed maxpacket */
- info1 |= QH_TOGGLE_CTL; /* toggle from qtd */
- info2 |= (FOTG210_TUNE_MULT_HS << 30);
- } else if (type == PIPE_BULK) {
- info1 |= (FOTG210_TUNE_RL_HS << 28);
- /* The USB spec says that high speed bulk endpoints
- * always use 512 byte maxpacket. But some device
- * vendors decided to ignore that, and MSFT is happy
- * to help them do so. So now people expect to use
- * such nonconformant devices with Linux too; sigh.
- */
- info1 |= maxp << 16;
- info2 |= (FOTG210_TUNE_MULT_HS << 30);
- } else { /* PIPE_INTERRUPT */
- info1 |= maxp << 16;
- info2 |= mult << 30;
- }
- break;
- default:
- fotg210_dbg(fotg210, "bogus dev %p speed %d\n", urb->dev,
- urb->dev->speed);
-done:
- qh_destroy(fotg210, qh);
- return NULL;
- }
-
- /* NOTE: if (PIPE_INTERRUPT) { scheduler sets s-mask } */
-
- /* init as live, toggle clear, advance to dummy */
- qh->qh_state = QH_STATE_IDLE;
- hw = qh->hw;
- hw->hw_info1 = cpu_to_hc32(fotg210, info1);
- hw->hw_info2 = cpu_to_hc32(fotg210, info2);
- qh->is_out = !is_input;
- usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input, 1);
- qh_refresh(fotg210, qh);
- return qh;
-}
-
-static void enable_async(struct fotg210_hcd *fotg210)
-{
- if (fotg210->async_count++)
- return;
-
- /* Stop waiting to turn off the async schedule */
- fotg210->enabled_hrtimer_events &= ~BIT(FOTG210_HRTIMER_DISABLE_ASYNC);
-
- /* Don't start the schedule until ASS is 0 */
- fotg210_poll_ASS(fotg210);
- turn_on_io_watchdog(fotg210);
-}
-
-static void disable_async(struct fotg210_hcd *fotg210)
-{
- if (--fotg210->async_count)
- return;
-
- /* The async schedule and async_unlink list are supposed to be empty */
- WARN_ON(fotg210->async->qh_next.qh || fotg210->async_unlink);
-
- /* Don't turn off the schedule until ASS is 1 */
- fotg210_poll_ASS(fotg210);
-}
-
-/* move qh (and its qtds) onto async queue; maybe enable queue. */
-
-static void qh_link_async(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- __hc32 dma = QH_NEXT(fotg210, qh->qh_dma);
- struct fotg210_qh *head;
-
- /* Don't link a QH if there's a Clear-TT-Buffer pending */
- if (unlikely(qh->clearing_tt))
- return;
-
- WARN_ON(qh->qh_state != QH_STATE_IDLE);
-
- /* clear halt and/or toggle; and maybe recover from silicon quirk */
- qh_refresh(fotg210, qh);
-
- /* splice right after start */
- head = fotg210->async;
- qh->qh_next = head->qh_next;
- qh->hw->hw_next = head->hw->hw_next;
- wmb();
-
- head->qh_next.qh = qh;
- head->hw->hw_next = dma;
-
- qh->xacterrs = 0;
- qh->qh_state = QH_STATE_LINKED;
- /* qtd completions reported later by interrupt */
-
- enable_async(fotg210);
-}
-
-/* For control/bulk/interrupt, return QH with these TDs appended.
- * Allocates and initializes the QH if necessary.
- * Returns null if it can't allocate a QH it needs to.
- * If the QH has TDs (urbs) already, that's great.
- */
-static struct fotg210_qh *qh_append_tds(struct fotg210_hcd *fotg210,
- struct urb *urb, struct list_head *qtd_list,
- int epnum, void **ptr)
-{
- struct fotg210_qh *qh = NULL;
- __hc32 qh_addr_mask = cpu_to_hc32(fotg210, 0x7f);
-
- qh = (struct fotg210_qh *) *ptr;
- if (unlikely(qh == NULL)) {
- /* can't sleep here, we have fotg210->lock... */
- qh = qh_make(fotg210, urb, GFP_ATOMIC);
- *ptr = qh;
- }
- if (likely(qh != NULL)) {
- struct fotg210_qtd *qtd;
-
- if (unlikely(list_empty(qtd_list)))
- qtd = NULL;
- else
- qtd = list_entry(qtd_list->next, struct fotg210_qtd,
- qtd_list);
-
- /* control qh may need patching ... */
- if (unlikely(epnum == 0)) {
- /* usb_reset_device() briefly reverts to address 0 */
- if (usb_pipedevice(urb->pipe) == 0)
- qh->hw->hw_info1 &= ~qh_addr_mask;
- }
-
- /* just one way to queue requests: swap with the dummy qtd.
- * only hc or qh_refresh() ever modify the overlay.
- */
- if (likely(qtd != NULL)) {
- struct fotg210_qtd *dummy;
- dma_addr_t dma;
- __hc32 token;
-
- /* to avoid racing the HC, use the dummy td instead of
- * the first td of our list (becomes new dummy). both
- * tds stay deactivated until we're done, when the
- * HC is allowed to fetch the old dummy (4.10.2).
- */
- token = qtd->hw_token;
- qtd->hw_token = HALT_BIT(fotg210);
-
- dummy = qh->dummy;
-
- dma = dummy->qtd_dma;
- *dummy = *qtd;
- dummy->qtd_dma = dma;
-
- list_del(&qtd->qtd_list);
- list_add(&dummy->qtd_list, qtd_list);
- list_splice_tail(qtd_list, &qh->qtd_list);
-
- fotg210_qtd_init(fotg210, qtd, qtd->qtd_dma);
- qh->dummy = qtd;
-
- /* hc must see the new dummy at list end */
- dma = qtd->qtd_dma;
- qtd = list_entry(qh->qtd_list.prev,
- struct fotg210_qtd, qtd_list);
- qtd->hw_next = QTD_NEXT(fotg210, dma);
-
- /* let the hc process these next qtds */
- wmb();
- dummy->hw_token = token;
-
- urb->hcpriv = qh;
- }
- }
- return qh;
-}
-
-static int submit_async(struct fotg210_hcd *fotg210, struct urb *urb,
- struct list_head *qtd_list, gfp_t mem_flags)
-{
- int epnum;
- unsigned long flags;
- struct fotg210_qh *qh = NULL;
- int rc;
-
- epnum = urb->ep->desc.bEndpointAddress;
-
-#ifdef FOTG210_URB_TRACE
- {
- struct fotg210_qtd *qtd;
-
- qtd = list_entry(qtd_list->next, struct fotg210_qtd, qtd_list);
- fotg210_dbg(fotg210,
- "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n",
- __func__, urb->dev->devpath, urb,
- epnum & 0x0f, (epnum & USB_DIR_IN)
- ? "in" : "out",
- urb->transfer_buffer_length,
- qtd, urb->ep->hcpriv);
- }
-#endif
-
- spin_lock_irqsave(&fotg210->lock, flags);
- if (unlikely(!HCD_HW_ACCESSIBLE(fotg210_to_hcd(fotg210)))) {
- rc = -ESHUTDOWN;
- goto done;
- }
- rc = usb_hcd_link_urb_to_ep(fotg210_to_hcd(fotg210), urb);
- if (unlikely(rc))
- goto done;
-
- qh = qh_append_tds(fotg210, urb, qtd_list, epnum, &urb->ep->hcpriv);
- if (unlikely(qh == NULL)) {
- usb_hcd_unlink_urb_from_ep(fotg210_to_hcd(fotg210), urb);
- rc = -ENOMEM;
- goto done;
- }
-
- /* Control/bulk operations through TTs don't need scheduling,
- * the HC and TT handle it when the TT has a buffer ready.
- */
- if (likely(qh->qh_state == QH_STATE_IDLE))
- qh_link_async(fotg210, qh);
-done:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- if (unlikely(qh == NULL))
- qtd_list_free(fotg210, urb, qtd_list);
- return rc;
-}
-
-static void single_unlink_async(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh)
-{
- struct fotg210_qh *prev;
-
- /* Add to the end of the list of QHs waiting for the next IAAD */
- qh->qh_state = QH_STATE_UNLINK;
- if (fotg210->async_unlink)
- fotg210->async_unlink_last->unlink_next = qh;
- else
- fotg210->async_unlink = qh;
- fotg210->async_unlink_last = qh;
-
- /* Unlink it from the schedule */
- prev = fotg210->async;
- while (prev->qh_next.qh != qh)
- prev = prev->qh_next.qh;
-
- prev->hw->hw_next = qh->hw->hw_next;
- prev->qh_next = qh->qh_next;
- if (fotg210->qh_scan_next == qh)
- fotg210->qh_scan_next = qh->qh_next.qh;
-}
-
-static void start_iaa_cycle(struct fotg210_hcd *fotg210, bool nested)
-{
- /*
- * Do nothing if an IAA cycle is already running or
- * if one will be started shortly.
- */
- if (fotg210->async_iaa || fotg210->async_unlinking)
- return;
-
- /* Do all the waiting QHs at once */
- fotg210->async_iaa = fotg210->async_unlink;
- fotg210->async_unlink = NULL;
-
- /* If the controller isn't running, we don't have to wait for it */
- if (unlikely(fotg210->rh_state < FOTG210_RH_RUNNING)) {
- if (!nested) /* Avoid recursion */
- end_unlink_async(fotg210);
-
- /* Otherwise start a new IAA cycle */
- } else if (likely(fotg210->rh_state == FOTG210_RH_RUNNING)) {
- /* Make sure the unlinks are all visible to the hardware */
- wmb();
-
- fotg210_writel(fotg210, fotg210->command | CMD_IAAD,
- &fotg210->regs->command);
- fotg210_readl(fotg210, &fotg210->regs->command);
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_IAA_WATCHDOG,
- true);
- }
-}
-
-/* the async qh for the qtds being unlinked are now gone from the HC */
-
-static void end_unlink_async(struct fotg210_hcd *fotg210)
-{
- struct fotg210_qh *qh;
-
- /* Process the idle QHs */
-restart:
- fotg210->async_unlinking = true;
- while (fotg210->async_iaa) {
- qh = fotg210->async_iaa;
- fotg210->async_iaa = qh->unlink_next;
- qh->unlink_next = NULL;
-
- qh->qh_state = QH_STATE_IDLE;
- qh->qh_next.qh = NULL;
-
- qh_completions(fotg210, qh);
- if (!list_empty(&qh->qtd_list) &&
- fotg210->rh_state == FOTG210_RH_RUNNING)
- qh_link_async(fotg210, qh);
- disable_async(fotg210);
- }
- fotg210->async_unlinking = false;
-
- /* Start a new IAA cycle if any QHs are waiting for it */
- if (fotg210->async_unlink) {
- start_iaa_cycle(fotg210, true);
- if (unlikely(fotg210->rh_state < FOTG210_RH_RUNNING))
- goto restart;
- }
-}
-
-static void unlink_empty_async(struct fotg210_hcd *fotg210)
-{
- struct fotg210_qh *qh, *next;
- bool stopped = (fotg210->rh_state < FOTG210_RH_RUNNING);
- bool check_unlinks_later = false;
-
- /* Unlink all the async QHs that have been empty for a timer cycle */
- next = fotg210->async->qh_next.qh;
- while (next) {
- qh = next;
- next = qh->qh_next.qh;
-
- if (list_empty(&qh->qtd_list) &&
- qh->qh_state == QH_STATE_LINKED) {
- if (!stopped && qh->unlink_cycle ==
- fotg210->async_unlink_cycle)
- check_unlinks_later = true;
- else
- single_unlink_async(fotg210, qh);
- }
- }
-
- /* Start a new IAA cycle if any QHs are waiting for it */
- if (fotg210->async_unlink)
- start_iaa_cycle(fotg210, false);
-
- /* QHs that haven't been empty for long enough will be handled later */
- if (check_unlinks_later) {
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_ASYNC_UNLINKS,
- true);
- ++fotg210->async_unlink_cycle;
- }
-}
-
-/* makes sure the async qh will become idle */
-/* caller must own fotg210->lock */
-
-static void start_unlink_async(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh)
-{
- /*
- * If the QH isn't linked then there's nothing we can do
- * unless we were called during a giveback, in which case
- * qh_completions() has to deal with it.
- */
- if (qh->qh_state != QH_STATE_LINKED) {
- if (qh->qh_state == QH_STATE_COMPLETING)
- qh->needs_rescan = 1;
- return;
- }
-
- single_unlink_async(fotg210, qh);
- start_iaa_cycle(fotg210, false);
-}
-
-static void scan_async(struct fotg210_hcd *fotg210)
-{
- struct fotg210_qh *qh;
- bool check_unlinks_later = false;
-
- fotg210->qh_scan_next = fotg210->async->qh_next.qh;
- while (fotg210->qh_scan_next) {
- qh = fotg210->qh_scan_next;
- fotg210->qh_scan_next = qh->qh_next.qh;
-rescan:
- /* clean any finished work for this qh */
- if (!list_empty(&qh->qtd_list)) {
- int temp;
-
- /*
- * Unlinks could happen here; completion reporting
- * drops the lock. That's why fotg210->qh_scan_next
- * always holds the next qh to scan; if the next qh
- * gets unlinked then fotg210->qh_scan_next is adjusted
- * in single_unlink_async().
- */
- temp = qh_completions(fotg210, qh);
- if (qh->needs_rescan) {
- start_unlink_async(fotg210, qh);
- } else if (list_empty(&qh->qtd_list)
- && qh->qh_state == QH_STATE_LINKED) {
- qh->unlink_cycle = fotg210->async_unlink_cycle;
- check_unlinks_later = true;
- } else if (temp != 0)
- goto rescan;
- }
- }
-
- /*
- * Unlink empty entries, reducing DMA usage as well
- * as HCD schedule-scanning costs. Delay for any qh
- * we just scanned, there's a not-unusual case that it
- * doesn't stay idle for long.
- */
- if (check_unlinks_later && fotg210->rh_state == FOTG210_RH_RUNNING &&
- !(fotg210->enabled_hrtimer_events &
- BIT(FOTG210_HRTIMER_ASYNC_UNLINKS))) {
- fotg210_enable_event(fotg210,
- FOTG210_HRTIMER_ASYNC_UNLINKS, true);
- ++fotg210->async_unlink_cycle;
- }
-}
-/* EHCI scheduled transaction support: interrupt, iso, split iso
- * These are called "periodic" transactions in the EHCI spec.
- *
- * Note that for interrupt transfers, the QH/QTD manipulation is shared
- * with the "asynchronous" transaction support (control/bulk transfers).
- * The only real difference is in how interrupt transfers are scheduled.
- *
- * For ISO, we make an "iso_stream" head to serve the same role as a QH.
- * It keeps track of every ITD (or SITD) that's linked, and holds enough
- * pre-calculated schedule data to make appending to the queue be quick.
- */
-static int fotg210_get_frame(struct usb_hcd *hcd);
-
-/* periodic_next_shadow - return "next" pointer on shadow list
- * @periodic: host pointer to qh/itd
- * @tag: hardware tag for type of this record
- */
-static union fotg210_shadow *periodic_next_shadow(struct fotg210_hcd *fotg210,
- union fotg210_shadow *periodic, __hc32 tag)
-{
- switch (hc32_to_cpu(fotg210, tag)) {
- case Q_TYPE_QH:
- return &periodic->qh->qh_next;
- case Q_TYPE_FSTN:
- return &periodic->fstn->fstn_next;
- default:
- return &periodic->itd->itd_next;
- }
-}
-
-static __hc32 *shadow_next_periodic(struct fotg210_hcd *fotg210,
- union fotg210_shadow *periodic, __hc32 tag)
-{
- switch (hc32_to_cpu(fotg210, tag)) {
- /* our fotg210_shadow.qh is actually software part */
- case Q_TYPE_QH:
- return &periodic->qh->hw->hw_next;
- /* others are hw parts */
- default:
- return periodic->hw_next;
- }
-}
-
-/* caller must hold fotg210->lock */
-static void periodic_unlink(struct fotg210_hcd *fotg210, unsigned frame,
- void *ptr)
-{
- union fotg210_shadow *prev_p = &fotg210->pshadow[frame];
- __hc32 *hw_p = &fotg210->periodic[frame];
- union fotg210_shadow here = *prev_p;
-
- /* find predecessor of "ptr"; hw and shadow lists are in sync */
- while (here.ptr && here.ptr != ptr) {
- prev_p = periodic_next_shadow(fotg210, prev_p,
- Q_NEXT_TYPE(fotg210, *hw_p));
- hw_p = shadow_next_periodic(fotg210, &here,
- Q_NEXT_TYPE(fotg210, *hw_p));
- here = *prev_p;
- }
- /* an interrupt entry (at list end) could have been shared */
- if (!here.ptr)
- return;
-
- /* update shadow and hardware lists ... the old "next" pointers
- * from ptr may still be in use, the caller updates them.
- */
- *prev_p = *periodic_next_shadow(fotg210, &here,
- Q_NEXT_TYPE(fotg210, *hw_p));
-
- *hw_p = *shadow_next_periodic(fotg210, &here,
- Q_NEXT_TYPE(fotg210, *hw_p));
-}
-
-/* how many of the uframe's 125 usecs are allocated? */
-static unsigned short periodic_usecs(struct fotg210_hcd *fotg210,
- unsigned frame, unsigned uframe)
-{
- __hc32 *hw_p = &fotg210->periodic[frame];
- union fotg210_shadow *q = &fotg210->pshadow[frame];
- unsigned usecs = 0;
- struct fotg210_qh_hw *hw;
-
- while (q->ptr) {
- switch (hc32_to_cpu(fotg210, Q_NEXT_TYPE(fotg210, *hw_p))) {
- case Q_TYPE_QH:
- hw = q->qh->hw;
- /* is it in the S-mask? */
- if (hw->hw_info2 & cpu_to_hc32(fotg210, 1 << uframe))
- usecs += q->qh->usecs;
- /* ... or C-mask? */
- if (hw->hw_info2 & cpu_to_hc32(fotg210,
- 1 << (8 + uframe)))
- usecs += q->qh->c_usecs;
- hw_p = &hw->hw_next;
- q = &q->qh->qh_next;
- break;
- /* case Q_TYPE_FSTN: */
- default:
- /* for "save place" FSTNs, count the relevant INTR
- * bandwidth from the previous frame
- */
- if (q->fstn->hw_prev != FOTG210_LIST_END(fotg210))
- fotg210_dbg(fotg210, "ignoring FSTN cost ...\n");
-
- hw_p = &q->fstn->hw_next;
- q = &q->fstn->fstn_next;
- break;
- case Q_TYPE_ITD:
- if (q->itd->hw_transaction[uframe])
- usecs += q->itd->stream->usecs;
- hw_p = &q->itd->hw_next;
- q = &q->itd->itd_next;
- break;
- }
- }
- if (usecs > fotg210->uframe_periodic_max)
- fotg210_err(fotg210, "uframe %d sched overrun: %d usecs\n",
- frame * 8 + uframe, usecs);
- return usecs;
-}
-
-static int same_tt(struct usb_device *dev1, struct usb_device *dev2)
-{
- if (!dev1->tt || !dev2->tt)
- return 0;
- if (dev1->tt != dev2->tt)
- return 0;
- if (dev1->tt->multi)
- return dev1->ttport == dev2->ttport;
- else
- return 1;
-}
-
-/* return true iff the device's transaction translator is available
- * for a periodic transfer starting at the specified frame, using
- * all the uframes in the mask.
- */
-static int tt_no_collision(struct fotg210_hcd *fotg210, unsigned period,
- struct usb_device *dev, unsigned frame, u32 uf_mask)
-{
- if (period == 0) /* error */
- return 0;
-
- /* note bandwidth wastage: split never follows csplit
- * (different dev or endpoint) until the next uframe.
- * calling convention doesn't make that distinction.
- */
- for (; frame < fotg210->periodic_size; frame += period) {
- union fotg210_shadow here;
- __hc32 type;
- struct fotg210_qh_hw *hw;
-
- here = fotg210->pshadow[frame];
- type = Q_NEXT_TYPE(fotg210, fotg210->periodic[frame]);
- while (here.ptr) {
- switch (hc32_to_cpu(fotg210, type)) {
- case Q_TYPE_ITD:
- type = Q_NEXT_TYPE(fotg210, here.itd->hw_next);
- here = here.itd->itd_next;
- continue;
- case Q_TYPE_QH:
- hw = here.qh->hw;
- if (same_tt(dev, here.qh->dev)) {
- u32 mask;
-
- mask = hc32_to_cpu(fotg210,
- hw->hw_info2);
- /* "knows" no gap is needed */
- mask |= mask >> 8;
- if (mask & uf_mask)
- break;
- }
- type = Q_NEXT_TYPE(fotg210, hw->hw_next);
- here = here.qh->qh_next;
- continue;
- /* case Q_TYPE_FSTN: */
- default:
- fotg210_dbg(fotg210,
- "periodic frame %d bogus type %d\n",
- frame, type);
- }
-
- /* collision or error */
- return 0;
- }
- }
-
- /* no collision */
- return 1;
-}
-
-static void enable_periodic(struct fotg210_hcd *fotg210)
-{
- if (fotg210->periodic_count++)
- return;
-
- /* Stop waiting to turn off the periodic schedule */
- fotg210->enabled_hrtimer_events &=
- ~BIT(FOTG210_HRTIMER_DISABLE_PERIODIC);
-
- /* Don't start the schedule until PSS is 0 */
- fotg210_poll_PSS(fotg210);
- turn_on_io_watchdog(fotg210);
-}
-
-static void disable_periodic(struct fotg210_hcd *fotg210)
-{
- if (--fotg210->periodic_count)
- return;
-
- /* Don't turn off the schedule until PSS is 1 */
- fotg210_poll_PSS(fotg210);
-}
-
-/* periodic schedule slots have iso tds (normal or split) first, then a
- * sparse tree for active interrupt transfers.
- *
- * this just links in a qh; caller guarantees uframe masks are set right.
- * no FSTN support (yet; fotg210 0.96+)
- */
-static void qh_link_periodic(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- unsigned i;
- unsigned period = qh->period;
-
- dev_dbg(&qh->dev->dev,
- "link qh%d-%04x/%p start %d [%d/%d us]\n", period,
- hc32_to_cpup(fotg210, &qh->hw->hw_info2) &
- (QH_CMASK | QH_SMASK), qh, qh->start, qh->usecs,
- qh->c_usecs);
-
- /* high bandwidth, or otherwise every microframe */
- if (period == 0)
- period = 1;
-
- for (i = qh->start; i < fotg210->periodic_size; i += period) {
- union fotg210_shadow *prev = &fotg210->pshadow[i];
- __hc32 *hw_p = &fotg210->periodic[i];
- union fotg210_shadow here = *prev;
- __hc32 type = 0;
-
- /* skip the iso nodes at list head */
- while (here.ptr) {
- type = Q_NEXT_TYPE(fotg210, *hw_p);
- if (type == cpu_to_hc32(fotg210, Q_TYPE_QH))
- break;
- prev = periodic_next_shadow(fotg210, prev, type);
- hw_p = shadow_next_periodic(fotg210, &here, type);
- here = *prev;
- }
-
- /* sorting each branch by period (slow-->fast)
- * enables sharing interior tree nodes
- */
- while (here.ptr && qh != here.qh) {
- if (qh->period > here.qh->period)
- break;
- prev = &here.qh->qh_next;
- hw_p = &here.qh->hw->hw_next;
- here = *prev;
- }
- /* link in this qh, unless some earlier pass did that */
- if (qh != here.qh) {
- qh->qh_next = here;
- if (here.qh)
- qh->hw->hw_next = *hw_p;
- wmb();
- prev->qh = qh;
- *hw_p = QH_NEXT(fotg210, qh->qh_dma);
- }
- }
- qh->qh_state = QH_STATE_LINKED;
- qh->xacterrs = 0;
-
- /* update per-qh bandwidth for usbfs */
- fotg210_to_hcd(fotg210)->self.bandwidth_allocated += qh->period
- ? ((qh->usecs + qh->c_usecs) / qh->period)
- : (qh->usecs * 8);
-
- list_add(&qh->intr_node, &fotg210->intr_qh_list);
-
- /* maybe enable periodic schedule processing */
- ++fotg210->intr_count;
- enable_periodic(fotg210);
-}
-
-static void qh_unlink_periodic(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh)
-{
- unsigned i;
- unsigned period;
-
- /*
- * If qh is for a low/full-speed device, simply unlinking it
- * could interfere with an ongoing split transaction. To unlink
- * it safely would require setting the QH_INACTIVATE bit and
- * waiting at least one frame, as described in EHCI 4.12.2.5.
- *
- * We won't bother with any of this. Instead, we assume that the
- * only reason for unlinking an interrupt QH while the current URB
- * is still active is to dequeue all the URBs (flush the whole
- * endpoint queue).
- *
- * If rebalancing the periodic schedule is ever implemented, this
- * approach will no longer be valid.
- */
-
- /* high bandwidth, or otherwise part of every microframe */
- period = qh->period;
- if (!period)
- period = 1;
-
- for (i = qh->start; i < fotg210->periodic_size; i += period)
- periodic_unlink(fotg210, i, qh);
-
- /* update per-qh bandwidth for usbfs */
- fotg210_to_hcd(fotg210)->self.bandwidth_allocated -= qh->period
- ? ((qh->usecs + qh->c_usecs) / qh->period)
- : (qh->usecs * 8);
-
- dev_dbg(&qh->dev->dev,
- "unlink qh%d-%04x/%p start %d [%d/%d us]\n",
- qh->period, hc32_to_cpup(fotg210, &qh->hw->hw_info2) &
- (QH_CMASK | QH_SMASK), qh, qh->start, qh->usecs,
- qh->c_usecs);
-
- /* qh->qh_next still "live" to HC */
- qh->qh_state = QH_STATE_UNLINK;
- qh->qh_next.ptr = NULL;
-
- if (fotg210->qh_scan_next == qh)
- fotg210->qh_scan_next = list_entry(qh->intr_node.next,
- struct fotg210_qh, intr_node);
- list_del(&qh->intr_node);
-}
-
-static void start_unlink_intr(struct fotg210_hcd *fotg210,
- struct fotg210_qh *qh)
-{
- /* If the QH isn't linked then there's nothing we can do
- * unless we were called during a giveback, in which case
- * qh_completions() has to deal with it.
- */
- if (qh->qh_state != QH_STATE_LINKED) {
- if (qh->qh_state == QH_STATE_COMPLETING)
- qh->needs_rescan = 1;
- return;
- }
-
- qh_unlink_periodic(fotg210, qh);
-
- /* Make sure the unlinks are visible before starting the timer */
- wmb();
-
- /*
- * The EHCI spec doesn't say how long it takes the controller to
- * stop accessing an unlinked interrupt QH. The timer delay is
- * 9 uframes; presumably that will be long enough.
- */
- qh->unlink_cycle = fotg210->intr_unlink_cycle;
-
- /* New entries go at the end of the intr_unlink list */
- if (fotg210->intr_unlink)
- fotg210->intr_unlink_last->unlink_next = qh;
- else
- fotg210->intr_unlink = qh;
- fotg210->intr_unlink_last = qh;
-
- if (fotg210->intr_unlinking)
- ; /* Avoid recursive calls */
- else if (fotg210->rh_state < FOTG210_RH_RUNNING)
- fotg210_handle_intr_unlinks(fotg210);
- else if (fotg210->intr_unlink == qh) {
- fotg210_enable_event(fotg210, FOTG210_HRTIMER_UNLINK_INTR,
- true);
- ++fotg210->intr_unlink_cycle;
- }
-}
-
-static void end_unlink_intr(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- struct fotg210_qh_hw *hw = qh->hw;
- int rc;
-
- qh->qh_state = QH_STATE_IDLE;
- hw->hw_next = FOTG210_LIST_END(fotg210);
-
- qh_completions(fotg210, qh);
-
- /* reschedule QH iff another request is queued */
- if (!list_empty(&qh->qtd_list) &&
- fotg210->rh_state == FOTG210_RH_RUNNING) {
- rc = qh_schedule(fotg210, qh);
-
- /* An error here likely indicates handshake failure
- * or no space left in the schedule. Neither fault
- * should happen often ...
- *
- * FIXME kill the now-dysfunctional queued urbs
- */
- if (rc != 0)
- fotg210_err(fotg210, "can't reschedule qh %p, err %d\n",
- qh, rc);
- }
-
- /* maybe turn off periodic schedule */
- --fotg210->intr_count;
- disable_periodic(fotg210);
-}
-
-static int check_period(struct fotg210_hcd *fotg210, unsigned frame,
- unsigned uframe, unsigned period, unsigned usecs)
-{
- int claimed;
-
- /* complete split running into next frame?
- * given FSTN support, we could sometimes check...
- */
- if (uframe >= 8)
- return 0;
-
- /* convert "usecs we need" to "max already claimed" */
- usecs = fotg210->uframe_periodic_max - usecs;
-
- /* we "know" 2 and 4 uframe intervals were rejected; so
- * for period 0, check _every_ microframe in the schedule.
- */
- if (unlikely(period == 0)) {
- do {
- for (uframe = 0; uframe < 7; uframe++) {
- claimed = periodic_usecs(fotg210, frame,
- uframe);
- if (claimed > usecs)
- return 0;
- }
- } while ((frame += 1) < fotg210->periodic_size);
-
- /* just check the specified uframe, at that period */
- } else {
- do {
- claimed = periodic_usecs(fotg210, frame, uframe);
- if (claimed > usecs)
- return 0;
- } while ((frame += period) < fotg210->periodic_size);
- }
-
- /* success! */
- return 1;
-}
-
-static int check_intr_schedule(struct fotg210_hcd *fotg210, unsigned frame,
- unsigned uframe, const struct fotg210_qh *qh, __hc32 *c_maskp)
-{
- int retval = -ENOSPC;
- u8 mask = 0;
-
- if (qh->c_usecs && uframe >= 6) /* FSTN territory? */
- goto done;
-
- if (!check_period(fotg210, frame, uframe, qh->period, qh->usecs))
- goto done;
- if (!qh->c_usecs) {
- retval = 0;
- *c_maskp = 0;
- goto done;
- }
-
- /* Make sure this tt's buffer is also available for CSPLITs.
- * We pessimize a bit; probably the typical full speed case
- * doesn't need the second CSPLIT.
- *
- * NOTE: both SPLIT and CSPLIT could be checked in just
- * one smart pass...
- */
- mask = 0x03 << (uframe + qh->gap_uf);
- *c_maskp = cpu_to_hc32(fotg210, mask << 8);
-
- mask |= 1 << uframe;
- if (tt_no_collision(fotg210, qh->period, qh->dev, frame, mask)) {
- if (!check_period(fotg210, frame, uframe + qh->gap_uf + 1,
- qh->period, qh->c_usecs))
- goto done;
- if (!check_period(fotg210, frame, uframe + qh->gap_uf,
- qh->period, qh->c_usecs))
- goto done;
- retval = 0;
- }
-done:
- return retval;
-}
-
-/* "first fit" scheduling policy used the first time through,
- * or when the previous schedule slot can't be re-used.
- */
-static int qh_schedule(struct fotg210_hcd *fotg210, struct fotg210_qh *qh)
-{
- int status;
- unsigned uframe;
- __hc32 c_mask;
- unsigned frame; /* 0..(qh->period - 1), or NO_FRAME */
- struct fotg210_qh_hw *hw = qh->hw;
-
- qh_refresh(fotg210, qh);
- hw->hw_next = FOTG210_LIST_END(fotg210);
- frame = qh->start;
-
- /* reuse the previous schedule slots, if we can */
- if (frame < qh->period) {
- uframe = ffs(hc32_to_cpup(fotg210, &hw->hw_info2) & QH_SMASK);
- status = check_intr_schedule(fotg210, frame, --uframe,
- qh, &c_mask);
- } else {
- uframe = 0;
- c_mask = 0;
- status = -ENOSPC;
- }
-
- /* else scan the schedule to find a group of slots such that all
- * uframes have enough periodic bandwidth available.
- */
- if (status) {
- /* "normal" case, uframing flexible except with splits */
- if (qh->period) {
- int i;
-
- for (i = qh->period; status && i > 0; --i) {
- frame = ++fotg210->random_frame % qh->period;
- for (uframe = 0; uframe < 8; uframe++) {
- status = check_intr_schedule(fotg210,
- frame, uframe, qh,
- &c_mask);
- if (status == 0)
- break;
- }
- }
-
- /* qh->period == 0 means every uframe */
- } else {
- frame = 0;
- status = check_intr_schedule(fotg210, 0, 0, qh,
- &c_mask);
- }
- if (status)
- goto done;
- qh->start = frame;
-
- /* reset S-frame and (maybe) C-frame masks */
- hw->hw_info2 &= cpu_to_hc32(fotg210, ~(QH_CMASK | QH_SMASK));
- hw->hw_info2 |= qh->period
- ? cpu_to_hc32(fotg210, 1 << uframe)
- : cpu_to_hc32(fotg210, QH_SMASK);
- hw->hw_info2 |= c_mask;
- } else
- fotg210_dbg(fotg210, "reused qh %p schedule\n", qh);
-
- /* stuff into the periodic schedule */
- qh_link_periodic(fotg210, qh);
-done:
- return status;
-}
-
-static int intr_submit(struct fotg210_hcd *fotg210, struct urb *urb,
- struct list_head *qtd_list, gfp_t mem_flags)
-{
- unsigned epnum;
- unsigned long flags;
- struct fotg210_qh *qh;
- int status;
- struct list_head empty;
-
- /* get endpoint and transfer/schedule data */
- epnum = urb->ep->desc.bEndpointAddress;
-
- spin_lock_irqsave(&fotg210->lock, flags);
-
- if (unlikely(!HCD_HW_ACCESSIBLE(fotg210_to_hcd(fotg210)))) {
- status = -ESHUTDOWN;
- goto done_not_linked;
- }
- status = usb_hcd_link_urb_to_ep(fotg210_to_hcd(fotg210), urb);
- if (unlikely(status))
- goto done_not_linked;
-
- /* get qh and force any scheduling errors */
- INIT_LIST_HEAD(&empty);
- qh = qh_append_tds(fotg210, urb, &empty, epnum, &urb->ep->hcpriv);
- if (qh == NULL) {
- status = -ENOMEM;
- goto done;
- }
- if (qh->qh_state == QH_STATE_IDLE) {
- status = qh_schedule(fotg210, qh);
- if (status)
- goto done;
- }
-
- /* then queue the urb's tds to the qh */
- qh = qh_append_tds(fotg210, urb, qtd_list, epnum, &urb->ep->hcpriv);
- BUG_ON(qh == NULL);
-
- /* ... update usbfs periodic stats */
- fotg210_to_hcd(fotg210)->self.bandwidth_int_reqs++;
-
-done:
- if (unlikely(status))
- usb_hcd_unlink_urb_from_ep(fotg210_to_hcd(fotg210), urb);
-done_not_linked:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- if (status)
- qtd_list_free(fotg210, urb, qtd_list);
-
- return status;
-}
-
-static void scan_intr(struct fotg210_hcd *fotg210)
-{
- struct fotg210_qh *qh;
-
- list_for_each_entry_safe(qh, fotg210->qh_scan_next,
- &fotg210->intr_qh_list, intr_node) {
-rescan:
- /* clean any finished work for this qh */
- if (!list_empty(&qh->qtd_list)) {
- int temp;
-
- /*
- * Unlinks could happen here; completion reporting
- * drops the lock. That's why fotg210->qh_scan_next
- * always holds the next qh to scan; if the next qh
- * gets unlinked then fotg210->qh_scan_next is adjusted
- * in qh_unlink_periodic().
- */
- temp = qh_completions(fotg210, qh);
- if (unlikely(qh->needs_rescan ||
- (list_empty(&qh->qtd_list) &&
- qh->qh_state == QH_STATE_LINKED)))
- start_unlink_intr(fotg210, qh);
- else if (temp != 0)
- goto rescan;
- }
- }
-}
-
-/* fotg210_iso_stream ops work with both ITD and SITD */
-
-static struct fotg210_iso_stream *iso_stream_alloc(gfp_t mem_flags)
-{
- struct fotg210_iso_stream *stream;
-
- stream = kzalloc_obj(*stream, mem_flags);
- if (likely(stream != NULL)) {
- INIT_LIST_HEAD(&stream->td_list);
- INIT_LIST_HEAD(&stream->free_list);
- stream->next_uframe = -1;
- }
- return stream;
-}
-
-static void iso_stream_init(struct fotg210_hcd *fotg210,
- struct fotg210_iso_stream *stream, struct usb_device *dev,
- int pipe, unsigned interval)
-{
- u32 buf1;
- unsigned epnum, maxp;
- int is_input;
- long bandwidth;
- unsigned multi;
- struct usb_host_endpoint *ep;
-
- /*
- * this might be a "high bandwidth" highspeed endpoint,
- * as encoded in the ep descriptor's wMaxPacket field
- */
- epnum = usb_pipeendpoint(pipe);
- is_input = usb_pipein(pipe) ? USB_DIR_IN : 0;
- ep = usb_pipe_endpoint(dev, pipe);
- maxp = usb_endpoint_maxp(&ep->desc);
- if (is_input)
- buf1 = (1 << 11);
- else
- buf1 = 0;
-
- multi = usb_endpoint_maxp_mult(&ep->desc);
- buf1 |= maxp;
- maxp *= multi;
-
- stream->buf0 = cpu_to_hc32(fotg210, (epnum << 8) | dev->devnum);
- stream->buf1 = cpu_to_hc32(fotg210, buf1);
- stream->buf2 = cpu_to_hc32(fotg210, multi);
-
- /* usbfs wants to report the average usecs per frame tied up
- * when transfers on this endpoint are scheduled ...
- */
- if (dev->speed == USB_SPEED_FULL) {
- interval <<= 3;
- stream->usecs = NS_TO_US(usb_calc_bus_time(dev->speed,
- is_input, 1, maxp));
- stream->usecs /= 8;
- } else {
- stream->highspeed = 1;
- stream->usecs = HS_USECS_ISO(maxp);
- }
- bandwidth = stream->usecs * 8;
- bandwidth /= interval;
-
- stream->bandwidth = bandwidth;
- stream->udev = dev;
- stream->bEndpointAddress = is_input | epnum;
- stream->interval = interval;
- stream->maxp = maxp;
-}
-
-static struct fotg210_iso_stream *iso_stream_find(struct fotg210_hcd *fotg210,
- struct urb *urb)
-{
- unsigned epnum;
- struct fotg210_iso_stream *stream;
- struct usb_host_endpoint *ep;
- unsigned long flags;
-
- epnum = usb_pipeendpoint(urb->pipe);
- if (usb_pipein(urb->pipe))
- ep = urb->dev->ep_in[epnum];
- else
- ep = urb->dev->ep_out[epnum];
-
- spin_lock_irqsave(&fotg210->lock, flags);
- stream = ep->hcpriv;
-
- if (unlikely(stream == NULL)) {
- stream = iso_stream_alloc(GFP_ATOMIC);
- if (likely(stream != NULL)) {
- ep->hcpriv = stream;
- stream->ep = ep;
- iso_stream_init(fotg210, stream, urb->dev, urb->pipe,
- urb->interval);
- }
-
- /* if dev->ep[epnum] is a QH, hw is set */
- } else if (unlikely(stream->hw != NULL)) {
- fotg210_dbg(fotg210, "dev %s ep%d%s, not iso??\n",
- urb->dev->devpath, epnum,
- usb_pipein(urb->pipe) ? "in" : "out");
- stream = NULL;
- }
-
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return stream;
-}
-
-/* fotg210_iso_sched ops can be ITD-only or SITD-only */
-
-static struct fotg210_iso_sched *iso_sched_alloc(unsigned packets,
- gfp_t mem_flags)
-{
- struct fotg210_iso_sched *iso_sched;
-
- iso_sched = kzalloc_flex(*iso_sched, packet, packets, mem_flags);
- if (likely(iso_sched != NULL))
- INIT_LIST_HEAD(&iso_sched->td_list);
-
- return iso_sched;
-}
-
-static inline void itd_sched_init(struct fotg210_hcd *fotg210,
- struct fotg210_iso_sched *iso_sched,
- struct fotg210_iso_stream *stream, struct urb *urb)
-{
- unsigned i;
- dma_addr_t dma = urb->transfer_dma;
-
- /* how many uframes are needed for these transfers */
- iso_sched->span = urb->number_of_packets * stream->interval;
-
- /* figure out per-uframe itd fields that we'll need later
- * when we fit new itds into the schedule.
- */
- for (i = 0; i < urb->number_of_packets; i++) {
- struct fotg210_iso_packet *uframe = &iso_sched->packet[i];
- unsigned length;
- dma_addr_t buf;
- u32 trans;
-
- length = urb->iso_frame_desc[i].length;
- buf = dma + urb->iso_frame_desc[i].offset;
-
- trans = FOTG210_ISOC_ACTIVE;
- trans |= buf & 0x0fff;
- if (unlikely(((i + 1) == urb->number_of_packets))
- && !(urb->transfer_flags & URB_NO_INTERRUPT))
- trans |= FOTG210_ITD_IOC;
- trans |= length << 16;
- uframe->transaction = cpu_to_hc32(fotg210, trans);
-
- /* might need to cross a buffer page within a uframe */
- uframe->bufp = (buf & ~(u64)0x0fff);
- buf += length;
- if (unlikely((uframe->bufp != (buf & ~(u64)0x0fff))))
- uframe->cross = 1;
- }
-}
-
-static void iso_sched_free(struct fotg210_iso_stream *stream,
- struct fotg210_iso_sched *iso_sched)
-{
- if (!iso_sched)
- return;
- /* caller must hold fotg210->lock!*/
- list_splice(&iso_sched->td_list, &stream->free_list);
- kfree(iso_sched);
-}
-
-static int itd_urb_transaction(struct fotg210_iso_stream *stream,
- struct fotg210_hcd *fotg210, struct urb *urb, gfp_t mem_flags)
-{
- struct fotg210_itd *itd;
- dma_addr_t itd_dma;
- int i;
- unsigned num_itds;
- struct fotg210_iso_sched *sched;
- unsigned long flags;
-
- sched = iso_sched_alloc(urb->number_of_packets, mem_flags);
- if (unlikely(sched == NULL))
- return -ENOMEM;
-
- itd_sched_init(fotg210, sched, stream, urb);
-
- if (urb->interval < 8)
- num_itds = 1 + (sched->span + 7) / 8;
- else
- num_itds = urb->number_of_packets;
-
- /* allocate/init ITDs */
- spin_lock_irqsave(&fotg210->lock, flags);
- for (i = 0; i < num_itds; i++) {
-
- /*
- * Use iTDs from the free list, but not iTDs that may
- * still be in use by the hardware.
- */
- if (likely(!list_empty(&stream->free_list))) {
- itd = list_first_entry(&stream->free_list,
- struct fotg210_itd, itd_list);
- if (itd->frame == fotg210->now_frame)
- goto alloc_itd;
- list_del(&itd->itd_list);
- itd_dma = itd->itd_dma;
- } else {
-alloc_itd:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- itd = dma_pool_alloc(fotg210->itd_pool, mem_flags,
- &itd_dma);
- spin_lock_irqsave(&fotg210->lock, flags);
- if (!itd) {
- iso_sched_free(stream, sched);
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return -ENOMEM;
- }
- }
-
- memset(itd, 0, sizeof(*itd));
- itd->itd_dma = itd_dma;
- list_add(&itd->itd_list, &sched->td_list);
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
-
- /* temporarily store schedule info in hcpriv */
- urb->hcpriv = sched;
- urb->error_count = 0;
- return 0;
-}
-
-static inline int itd_slot_ok(struct fotg210_hcd *fotg210, u32 mod, u32 uframe,
- u8 usecs, u32 period)
-{
- uframe %= period;
- do {
- /* can't commit more than uframe_periodic_max usec */
- if (periodic_usecs(fotg210, uframe >> 3, uframe & 0x7)
- > (fotg210->uframe_periodic_max - usecs))
- return 0;
-
- /* we know urb->interval is 2^N uframes */
- uframe += period;
- } while (uframe < mod);
- return 1;
-}
-
-/* This scheduler plans almost as far into the future as it has actual
- * periodic schedule slots. (Affected by TUNE_FLS, which defaults to
- * "as small as possible" to be cache-friendlier.) That limits the size
- * transfers you can stream reliably; avoid more than 64 msec per urb.
- * Also avoid queue depths of less than fotg210's worst irq latency (affected
- * by the per-urb URB_NO_INTERRUPT hint, the log2_irq_thresh module parameter,
- * and other factors); or more than about 230 msec total (for portability,
- * given FOTG210_TUNE_FLS and the slop). Or, write a smarter scheduler!
- */
-
-#define SCHEDULE_SLOP 80 /* microframes */
-
-static int iso_stream_schedule(struct fotg210_hcd *fotg210, struct urb *urb,
- struct fotg210_iso_stream *stream)
-{
- u32 now, next, start, period, span;
- int status;
- unsigned mod = fotg210->periodic_size << 3;
- struct fotg210_iso_sched *sched = urb->hcpriv;
-
- period = urb->interval;
- span = sched->span;
-
- if (span > mod - SCHEDULE_SLOP) {
- fotg210_dbg(fotg210, "iso request %p too long\n", urb);
- status = -EFBIG;
- goto fail;
- }
-
- now = fotg210_read_frame_index(fotg210) & (mod - 1);
-
- /* Typical case: reuse current schedule, stream is still active.
- * Hopefully there are no gaps from the host falling behind
- * (irq delays etc), but if there are we'll take the next
- * slot in the schedule, implicitly assuming URB_ISO_ASAP.
- */
- if (likely(!list_empty(&stream->td_list))) {
- u32 excess;
-
- /* For high speed devices, allow scheduling within the
- * isochronous scheduling threshold. For full speed devices
- * and Intel PCI-based controllers, don't (work around for
- * Intel ICH9 bug).
- */
- if (!stream->highspeed && fotg210->fs_i_thresh)
- next = now + fotg210->i_thresh;
- else
- next = now;
-
- /* Fell behind (by up to twice the slop amount)?
- * We decide based on the time of the last currently-scheduled
- * slot, not the time of the next available slot.
- */
- excess = (stream->next_uframe - period - next) & (mod - 1);
- if (excess >= mod - 2 * SCHEDULE_SLOP)
- start = next + excess - mod + period *
- DIV_ROUND_UP(mod - excess, period);
- else
- start = next + excess + period;
- if (start - now >= mod) {
- fotg210_dbg(fotg210, "request %p would overflow (%d+%d >= %d)\n",
- urb, start - now - period, period,
- mod);
- status = -EFBIG;
- goto fail;
- }
- }
-
- /* need to schedule; when's the next (u)frame we could start?
- * this is bigger than fotg210->i_thresh allows; scheduling itself
- * isn't free, the slop should handle reasonably slow cpus. it
- * can also help high bandwidth if the dma and irq loads don't
- * jump until after the queue is primed.
- */
- else {
- int done = 0;
-
- start = SCHEDULE_SLOP + (now & ~0x07);
-
- /* NOTE: assumes URB_ISO_ASAP, to limit complexity/bugs */
-
- /* find a uframe slot with enough bandwidth.
- * Early uframes are more precious because full-speed
- * iso IN transfers can't use late uframes,
- * and therefore they should be allocated last.
- */
- next = start;
- start += period;
- do {
- start--;
- /* check schedule: enough space? */
- if (itd_slot_ok(fotg210, mod, start,
- stream->usecs, period))
- done = 1;
- } while (start > next && !done);
-
- /* no room in the schedule */
- if (!done) {
- fotg210_dbg(fotg210, "iso resched full %p (now %d max %d)\n",
- urb, now, now + mod);
- status = -ENOSPC;
- goto fail;
- }
- }
-
- /* Tried to schedule too far into the future? */
- if (unlikely(start - now + span - period >=
- mod - 2 * SCHEDULE_SLOP)) {
- fotg210_dbg(fotg210, "request %p would overflow (%d+%d >= %d)\n",
- urb, start - now, span - period,
- mod - 2 * SCHEDULE_SLOP);
- status = -EFBIG;
- goto fail;
- }
-
- stream->next_uframe = start & (mod - 1);
-
- /* report high speed start in uframes; full speed, in frames */
- urb->start_frame = stream->next_uframe;
- if (!stream->highspeed)
- urb->start_frame >>= 3;
-
- /* Make sure scan_isoc() sees these */
- if (fotg210->isoc_count == 0)
- fotg210->next_frame = now >> 3;
- return 0;
-
-fail:
- return status;
-}
-
-static inline void itd_init(struct fotg210_hcd *fotg210,
- struct fotg210_iso_stream *stream, struct fotg210_itd *itd)
-{
- int i;
-
- /* it's been recently zeroed */
- itd->hw_next = FOTG210_LIST_END(fotg210);
- itd->hw_bufp[0] = stream->buf0;
- itd->hw_bufp[1] = stream->buf1;
- itd->hw_bufp[2] = stream->buf2;
-
- for (i = 0; i < 8; i++)
- itd->index[i] = -1;
-
- /* All other fields are filled when scheduling */
-}
-
-static inline void itd_patch(struct fotg210_hcd *fotg210,
- struct fotg210_itd *itd, struct fotg210_iso_sched *iso_sched,
- unsigned index, u16 uframe)
-{
- struct fotg210_iso_packet *uf = &iso_sched->packet[index];
- unsigned pg = itd->pg;
-
- uframe &= 0x07;
- itd->index[uframe] = index;
-
- itd->hw_transaction[uframe] = uf->transaction;
- itd->hw_transaction[uframe] |= cpu_to_hc32(fotg210, pg << 12);
- itd->hw_bufp[pg] |= cpu_to_hc32(fotg210, uf->bufp & ~(u32)0);
- itd->hw_bufp_hi[pg] |= cpu_to_hc32(fotg210, (u32)(uf->bufp >> 32));
-
- /* iso_frame_desc[].offset must be strictly increasing */
- if (unlikely(uf->cross)) {
- u64 bufp = uf->bufp + 4096;
-
- itd->pg = ++pg;
- itd->hw_bufp[pg] |= cpu_to_hc32(fotg210, bufp & ~(u32)0);
- itd->hw_bufp_hi[pg] |= cpu_to_hc32(fotg210, (u32)(bufp >> 32));
- }
-}
-
-static inline void itd_link(struct fotg210_hcd *fotg210, unsigned frame,
- struct fotg210_itd *itd)
-{
- union fotg210_shadow *prev = &fotg210->pshadow[frame];
- __hc32 *hw_p = &fotg210->periodic[frame];
- union fotg210_shadow here = *prev;
- __hc32 type = 0;
-
- /* skip any iso nodes which might belong to previous microframes */
- while (here.ptr) {
- type = Q_NEXT_TYPE(fotg210, *hw_p);
- if (type == cpu_to_hc32(fotg210, Q_TYPE_QH))
- break;
- prev = periodic_next_shadow(fotg210, prev, type);
- hw_p = shadow_next_periodic(fotg210, &here, type);
- here = *prev;
- }
-
- itd->itd_next = here;
- itd->hw_next = *hw_p;
- prev->itd = itd;
- itd->frame = frame;
- wmb();
- *hw_p = cpu_to_hc32(fotg210, itd->itd_dma | Q_TYPE_ITD);
-}
-
-/* fit urb's itds into the selected schedule slot; activate as needed */
-static void itd_link_urb(struct fotg210_hcd *fotg210, struct urb *urb,
- unsigned mod, struct fotg210_iso_stream *stream)
-{
- int packet;
- unsigned next_uframe, uframe, frame;
- struct fotg210_iso_sched *iso_sched = urb->hcpriv;
- struct fotg210_itd *itd;
-
- next_uframe = stream->next_uframe & (mod - 1);
-
- if (unlikely(list_empty(&stream->td_list))) {
- fotg210_to_hcd(fotg210)->self.bandwidth_allocated
- += stream->bandwidth;
- fotg210_dbg(fotg210,
- "schedule devp %s ep%d%s-iso period %d start %d.%d\n",
- urb->dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
- urb->interval,
- next_uframe >> 3, next_uframe & 0x7);
- }
-
- /* fill iTDs uframe by uframe */
- for (packet = 0, itd = NULL; packet < urb->number_of_packets;) {
- if (itd == NULL) {
- /* ASSERT: we have all necessary itds */
-
- /* ASSERT: no itds for this endpoint in this uframe */
-
- itd = list_entry(iso_sched->td_list.next,
- struct fotg210_itd, itd_list);
- list_move_tail(&itd->itd_list, &stream->td_list);
- itd->stream = stream;
- itd->urb = urb;
- itd_init(fotg210, stream, itd);
- }
-
- uframe = next_uframe & 0x07;
- frame = next_uframe >> 3;
-
- itd_patch(fotg210, itd, iso_sched, packet, uframe);
-
- next_uframe += stream->interval;
- next_uframe &= mod - 1;
- packet++;
-
- /* link completed itds into the schedule */
- if (((next_uframe >> 3) != frame)
- || packet == urb->number_of_packets) {
- itd_link(fotg210, frame & (fotg210->periodic_size - 1),
- itd);
- itd = NULL;
- }
- }
- stream->next_uframe = next_uframe;
-
- /* don't need that schedule data any more */
- iso_sched_free(stream, iso_sched);
- urb->hcpriv = NULL;
-
- ++fotg210->isoc_count;
- enable_periodic(fotg210);
-}
-
-#define ISO_ERRS (FOTG210_ISOC_BUF_ERR | FOTG210_ISOC_BABBLE |\
- FOTG210_ISOC_XACTERR)
-
-/* Process and recycle a completed ITD. Return true iff its urb completed,
- * and hence its completion callback probably added things to the hardware
- * schedule.
- *
- * Note that we carefully avoid recycling this descriptor until after any
- * completion callback runs, so that it won't be reused quickly. That is,
- * assuming (a) no more than two urbs per frame on this endpoint, and also
- * (b) only this endpoint's completions submit URBs. It seems some silicon
- * corrupts things if you reuse completed descriptors very quickly...
- */
-static bool itd_complete(struct fotg210_hcd *fotg210, struct fotg210_itd *itd)
-{
- struct urb *urb = itd->urb;
- struct usb_iso_packet_descriptor *desc;
- u32 t;
- unsigned uframe;
- int urb_index = -1;
- struct fotg210_iso_stream *stream = itd->stream;
- struct usb_device *dev;
- bool retval = false;
-
- /* for each uframe with a packet */
- for (uframe = 0; uframe < 8; uframe++) {
- if (likely(itd->index[uframe] == -1))
- continue;
- urb_index = itd->index[uframe];
- desc = &urb->iso_frame_desc[urb_index];
-
- t = hc32_to_cpup(fotg210, &itd->hw_transaction[uframe]);
- itd->hw_transaction[uframe] = 0;
-
- /* report transfer status */
- if (unlikely(t & ISO_ERRS)) {
- urb->error_count++;
- if (t & FOTG210_ISOC_BUF_ERR)
- desc->status = usb_pipein(urb->pipe)
- ? -ENOSR /* hc couldn't read */
- : -ECOMM; /* hc couldn't write */
- else if (t & FOTG210_ISOC_BABBLE)
- desc->status = -EOVERFLOW;
- else /* (t & FOTG210_ISOC_XACTERR) */
- desc->status = -EPROTO;
-
- /* HC need not update length with this error */
- if (!(t & FOTG210_ISOC_BABBLE)) {
- desc->actual_length = FOTG210_ITD_LENGTH(t);
- urb->actual_length += desc->actual_length;
- }
- } else if (likely((t & FOTG210_ISOC_ACTIVE) == 0)) {
- desc->status = 0;
- desc->actual_length = FOTG210_ITD_LENGTH(t);
- urb->actual_length += desc->actual_length;
- } else {
- /* URB was too late */
- desc->status = -EXDEV;
- }
- }
-
- /* handle completion now? */
- if (likely((urb_index + 1) != urb->number_of_packets))
- goto done;
-
- /* ASSERT: it's really the last itd for this urb
- * list_for_each_entry (itd, &stream->td_list, itd_list)
- * BUG_ON (itd->urb == urb);
- */
-
- /* give urb back to the driver; completion often (re)submits */
- dev = urb->dev;
- fotg210_urb_done(fotg210, urb, 0);
- retval = true;
- urb = NULL;
-
- --fotg210->isoc_count;
- disable_periodic(fotg210);
-
- if (unlikely(list_is_singular(&stream->td_list))) {
- fotg210_to_hcd(fotg210)->self.bandwidth_allocated
- -= stream->bandwidth;
- fotg210_dbg(fotg210,
- "deschedule devp %s ep%d%s-iso\n",
- dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out");
- }
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
-done:
- itd->urb = NULL;
+#include "../host/ehci.h"
+#include "fotg210.h"
- /* Add to the end of the free list for later reuse */
- list_move_tail(&itd->itd_list, &stream->free_list);
+#define FOTG210_PORTSC 0x30
+#define FOTG210_MISC 0x40
+#define FOTG200_MISC_SPEED_MASK GENMASK(10, 9)
+#define FOTG200_MISC_SPEED_SHIFT 9
+#define FOTG210_MISC_EOF1_MASK GENMASK(3, 2)
+#define FOTG210_MISC_EOF1_720_21000_4000 (3 << 2)
+#define FOTG210_MISC_AS_SLP_MASK GENMASK(1, 0)
+#define FOTG210_MISC_AS_SLP_10US BIT(0)
+#define FOTG210_OTGCSR 0x80
+#define FOTG210_OTGCSR_SPEED_MASK GENMASK(23, 22)
+#define FOTG210_OTGCSR_SPEED_SHIFT 22
+
+struct fotg210_hcd {
+ struct fotg210 *fotg;
+};
- /* Recycle the iTDs when the pipeline is empty (ep no longer in use) */
- if (list_empty(&stream->td_list)) {
- list_splice_tail_init(&stream->free_list,
- &fotg210->cached_itd_list);
- start_free_itds(fotg210);
- }
+#define hcd_to_fotg210_priv(hcd) \
+ ((struct fotg210_hcd *)hcd_to_ehci(hcd)->priv)
- return retval;
-}
+static struct hc_driver __read_mostly fotg210_hc_driver;
-static int itd_submit(struct fotg210_hcd *fotg210, struct urb *urb,
- gfp_t mem_flags)
+static unsigned int fotg210_get_port_speed(struct ehci_hcd *ehci,
+ unsigned int port)
{
- int status = -EINVAL;
- unsigned long flags;
- struct fotg210_iso_stream *stream;
+ struct fotg210 *fotg = hcd_to_fotg210_priv(ehci_to_hcd(ehci))->fotg;
+ u32 speed;
- /* Get iso_stream head */
- stream = iso_stream_find(fotg210, urb);
- if (unlikely(stream == NULL)) {
- fotg210_dbg(fotg210, "can't get iso stream\n");
- return -ENOMEM;
- }
- if (unlikely(urb->interval != stream->interval &&
- fotg210_port_speed(fotg210, 0) ==
- USB_PORT_STAT_HIGH_SPEED)) {
- fotg210_dbg(fotg210, "can't change iso interval %d --> %d\n",
- stream->interval, urb->interval);
- goto done;
- }
-
-#ifdef FOTG210_URB_TRACE
- fotg210_dbg(fotg210,
- "%s %s urb %p ep%d%s len %d, %d pkts %d uframes[%p]\n",
- __func__, urb->dev->devpath, urb,
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "in" : "out",
- urb->transfer_buffer_length,
- urb->number_of_packets, urb->interval,
- stream);
-#endif
-
- /* allocate ITDs w/o locking anything */
- status = itd_urb_transaction(stream, fotg210, urb, mem_flags);
- if (unlikely(status < 0)) {
- fotg210_dbg(fotg210, "can't init itds\n");
- goto done;
- }
-
- /* schedule ... need to lock */
- spin_lock_irqsave(&fotg210->lock, flags);
- if (unlikely(!HCD_HW_ACCESSIBLE(fotg210_to_hcd(fotg210)))) {
- status = -ESHUTDOWN;
- goto done_not_linked;
- }
- status = usb_hcd_link_urb_to_ep(fotg210_to_hcd(fotg210), urb);
- if (unlikely(status))
- goto done_not_linked;
- status = iso_stream_schedule(fotg210, urb, stream);
- if (likely(status == 0))
- itd_link_urb(fotg210, urb, fotg210->periodic_size << 3, stream);
+ if (fotg->is_fotg210)
+ speed = (readl(fotg->base + FOTG210_OTGCSR) &
+ FOTG210_OTGCSR_SPEED_MASK) >> FOTG210_OTGCSR_SPEED_SHIFT;
else
- usb_hcd_unlink_urb_from_ep(fotg210_to_hcd(fotg210), urb);
-done_not_linked:
- if (status < 0) {
- iso_sched_free(stream, urb->hcpriv);
- urb->hcpriv = NULL;
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
-done:
- return status;
-}
-
-static inline int scan_frame_queue(struct fotg210_hcd *fotg210, unsigned frame,
- unsigned now_frame, bool live)
-{
- unsigned uf;
- bool modified;
- union fotg210_shadow q, *q_p;
- __hc32 type, *hw_p;
+ speed = (readl(fotg->base + FOTG210_MISC) &
+ FOTG200_MISC_SPEED_MASK) >> FOTG200_MISC_SPEED_SHIFT;
- /* scan each element in frame's queue for completions */
- q_p = &fotg210->pshadow[frame];
- hw_p = &fotg210->periodic[frame];
- q.ptr = q_p->ptr;
- type = Q_NEXT_TYPE(fotg210, *hw_p);
- modified = false;
-
- while (q.ptr) {
- switch (hc32_to_cpu(fotg210, type)) {
- case Q_TYPE_ITD:
- /* If this ITD is still active, leave it for
- * later processing ... check the next entry.
- * No need to check for activity unless the
- * frame is current.
- */
- if (frame == now_frame && live) {
- rmb();
- for (uf = 0; uf < 8; uf++) {
- if (q.itd->hw_transaction[uf] &
- ITD_ACTIVE(fotg210))
- break;
- }
- if (uf < 8) {
- q_p = &q.itd->itd_next;
- hw_p = &q.itd->hw_next;
- type = Q_NEXT_TYPE(fotg210,
- q.itd->hw_next);
- q = *q_p;
- break;
- }
- }
-
- /* Take finished ITDs out of the schedule
- * and process them: recycle, maybe report
- * URB completion. HC won't cache the
- * pointer for much longer, if at all.
- */
- *q_p = q.itd->itd_next;
- *hw_p = q.itd->hw_next;
- type = Q_NEXT_TYPE(fotg210, q.itd->hw_next);
- wmb();
- modified = itd_complete(fotg210, q.itd);
- q = *q_p;
- break;
- default:
- fotg210_dbg(fotg210, "corrupt type %d frame %d shadow %p\n",
- type, frame, q.ptr);
- fallthrough;
- case Q_TYPE_QH:
- case Q_TYPE_FSTN:
- /* End of the iTDs and siTDs */
- q.ptr = NULL;
- break;
- }
-
- /* assume completion callbacks modify the queue */
- if (unlikely(modified && fotg210->isoc_count > 0))
- return -EINVAL;
+ switch (speed) {
+ case 0:
+ return 0;
+ case 1:
+ return USB_PORT_STAT_LOW_SPEED;
+ case 2:
+ default:
+ return USB_PORT_STAT_HIGH_SPEED;
}
- return 0;
}
-static void scan_isoc(struct fotg210_hcd *fotg210)
+static int fotg210_pre_port_reset(struct ehci_hcd *ehci, unsigned int port)
{
- unsigned uf, now_frame, frame, ret;
- unsigned fmask = fotg210->periodic_size - 1;
- bool live;
-
- /*
- * When running, scan from last scan point up to "now"
- * else clean up by scanning everything that's left.
- * Touches as few pages as possible: cache-friendly.
- */
- if (fotg210->rh_state >= FOTG210_RH_RUNNING) {
- uf = fotg210_read_frame_index(fotg210);
- now_frame = (uf >> 3) & fmask;
- live = true;
- } else {
- now_frame = (fotg210->next_frame - 1) & fmask;
- live = false;
- }
- fotg210->now_frame = now_frame;
+ u32 command;
- frame = fotg210->next_frame;
- for (;;) {
- ret = 1;
- while (ret != 0)
- ret = scan_frame_queue(fotg210, frame,
- now_frame, live);
+ /* FOTG210 requires Run/Stop to be clear while PORTSC.Reset is set. */
+ command = ehci_readl(ehci, &ehci->regs->command);
+ ehci_writel(ehci, command & ~CMD_RUN, &ehci->regs->command);
- /* Stop when we have reached the current frame */
- if (frame == now_frame)
- break;
- frame = (frame + 1) & fmask;
- }
- fotg210->next_frame = now_frame;
+ return ehci_handshake(ehci, &ehci->regs->status,
+ STS_HALT, STS_HALT, 16 * 125);
}
-/* Display / Set uframe_periodic_max
- */
-static ssize_t uframe_periodic_max_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static int fotg210_post_port_reset(struct ehci_hcd *ehci, unsigned int port)
{
- struct fotg210_hcd *fotg210;
+ ehci_writel(ehci, ehci->command | CMD_RUN, &ehci->regs->command);
- fotg210 = hcd_to_fotg210(bus_to_hcd(dev_get_drvdata(dev)));
- return sysfs_emit(buf, "%d\n", fotg210->uframe_periodic_max);
+ return ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0,
+ 16 * 125);
}
-static ssize_t uframe_periodic_max_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
+static int fotg210_hcd_reset(struct usb_hcd *hcd)
{
- struct fotg210_hcd *fotg210;
- unsigned uframe_periodic_max;
- unsigned frame, uframe;
- unsigned short allocated_max;
- unsigned long flags;
- ssize_t ret;
+ struct fotg210 *fotg = hcd_to_fotg210_priv(hcd)->fotg;
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ u32 val;
+ int ret;
- fotg210 = hcd_to_fotg210(bus_to_hcd(dev_get_drvdata(dev)));
+ /* FOTG210 embeds an EHCI core but moves and omits some registers. */
+ ehci->port_status = hcd->regs + FOTG210_PORTSC;
+ ehci->get_port_speed = fotg210_get_port_speed;
+ ehci->pre_port_reset = fotg210_pre_port_reset;
+ ehci->post_port_reset = fotg210_post_port_reset;
+ ehci->no_configured_flag = 1;
+ ehci->no_tdi_mode = 1;
+ ehci->no_fsls_isoc = 1;
+ hcd->has_tt = 1;
- ret = kstrtouint(buf, 0, &uframe_periodic_max);
+ ret = ehci_setup(hcd);
if (ret)
return ret;
- if (uframe_periodic_max < 100 || uframe_periodic_max >= 125) {
- fotg210_info(fotg210, "rejecting invalid request for uframe_periodic_max=%u\n",
- uframe_periodic_max);
- return -EINVAL;
- }
-
- ret = -EINVAL;
-
- /*
- * lock, so that our checking does not race with possible periodic
- * bandwidth allocation through submitting new urbs.
- */
- spin_lock_irqsave(&fotg210->lock, flags);
-
- /*
- * for request to decrease max periodic bandwidth, we have to check
- * every microframe in the schedule to see whether the decrease is
- * possible.
- */
- if (uframe_periodic_max < fotg210->uframe_periodic_max) {
- allocated_max = 0;
-
- for (frame = 0; frame < fotg210->periodic_size; ++frame)
- for (uframe = 0; uframe < 7; ++uframe)
- allocated_max = max(allocated_max,
- periodic_usecs(fotg210, frame,
- uframe));
-
- if (allocated_max > uframe_periodic_max) {
- fotg210_info(fotg210,
- "cannot decrease uframe_periodic_max because periodic bandwidth is already allocated (%u > %u)\n",
- allocated_max, uframe_periodic_max);
- goto out_unlock;
- }
- }
-
- /* increasing is always ok */
-
- fotg210_info(fotg210,
- "setting max periodic bandwidth to %u%% (== %u usec/uframe)\n",
- 100 * uframe_periodic_max/125, uframe_periodic_max);
-
- if (uframe_periodic_max != 100)
- fotg210_warn(fotg210, "max periodic bandwidth set is non-standard\n");
-
- fotg210->uframe_periodic_max = uframe_periodic_max;
- ret = count;
-
-out_unlock:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return ret;
-}
-
-static DEVICE_ATTR_RW(uframe_periodic_max);
-
-static inline int create_sysfs_files(struct fotg210_hcd *fotg210)
-{
- struct device *controller = fotg210_to_hcd(fotg210)->self.controller;
-
- return device_create_file(controller, &dev_attr_uframe_periodic_max);
-}
-
-static inline void remove_sysfs_files(struct fotg210_hcd *fotg210)
-{
- struct device *controller = fotg210_to_hcd(fotg210)->self.controller;
-
- device_remove_file(controller, &dev_attr_uframe_periodic_max);
-}
-/* On some systems, leaving remote wakeup enabled prevents system shutdown.
- * The firmware seems to think that powering off is a wakeup event!
- * This routine turns off remote wakeup and everything else, on all ports.
- */
-static void fotg210_turn_off_all_ports(struct fotg210_hcd *fotg210)
-{
- u32 __iomem *status_reg = &fotg210->regs->port_status;
-
- fotg210_writel(fotg210, PORT_RWC_BITS, status_reg);
-}
-
-/* Halt HC, turn off all ports, and let the BIOS use the companion controllers.
- * Must be called with interrupts enabled and the lock not held.
- */
-static void fotg210_silence_controller(struct fotg210_hcd *fotg210)
-{
- fotg210_halt(fotg210);
-
- spin_lock_irq(&fotg210->lock);
- fotg210->rh_state = FOTG210_RH_HALTED;
- fotg210_turn_off_all_ports(fotg210);
- spin_unlock_irq(&fotg210->lock);
-}
-
-/* fotg210_shutdown kick in for silicon on any bus (not just pci, etc).
- * This forcibly disables dma and IRQs, helping kexec and other cases
- * where the next system software may expect clean state.
- */
-static void fotg210_shutdown(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
-
- spin_lock_irq(&fotg210->lock);
- fotg210->shutdown = true;
- fotg210->rh_state = FOTG210_RH_STOPPING;
- fotg210->enabled_hrtimer_events = 0;
- spin_unlock_irq(&fotg210->lock);
-
- fotg210_silence_controller(fotg210);
-
- hrtimer_cancel(&fotg210->hrtimer);
-}
-
-/* fotg210_work is called from some interrupts, timers, and so on.
- * it calls driver completion functions, after dropping fotg210->lock.
- */
-static void fotg210_work(struct fotg210_hcd *fotg210)
-{
- /* another CPU may drop fotg210->lock during a schedule scan while
- * it reports urb completions. this flag guards against bogus
- * attempts at re-entrant schedule scanning.
- */
- if (fotg210->scanning) {
- fotg210->need_rescan = true;
- return;
- }
- fotg210->scanning = true;
-
-rescan:
- fotg210->need_rescan = false;
- if (fotg210->async_count)
- scan_async(fotg210);
- if (fotg210->intr_count > 0)
- scan_intr(fotg210);
- if (fotg210->isoc_count > 0)
- scan_isoc(fotg210);
- if (fotg210->need_rescan)
- goto rescan;
- fotg210->scanning = false;
-
- /* the IO watchdog guards against hardware or driver bugs that
- * misplace IRQs, and should let us run completely without IRQs.
- * such lossage has been observed on both VT6202 and VT8235.
- */
- turn_on_io_watchdog(fotg210);
-}
-
-/* Called when the fotg210_hcd module is removed.
- */
-static void fotg210_stop(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
-
- fotg210_dbg(fotg210, "stop\n");
-
- /* no more interrupts ... */
-
- spin_lock_irq(&fotg210->lock);
- fotg210->enabled_hrtimer_events = 0;
- spin_unlock_irq(&fotg210->lock);
-
- fotg210_quiesce(fotg210);
- fotg210_silence_controller(fotg210);
- fotg210_reset(fotg210);
-
- hrtimer_cancel(&fotg210->hrtimer);
- remove_sysfs_files(fotg210);
- remove_debug_files(fotg210);
-
- /* root hub is shut down separately (first, when possible) */
- spin_lock_irq(&fotg210->lock);
- end_free_itds(fotg210);
- spin_unlock_irq(&fotg210->lock);
- fotg210_mem_cleanup(fotg210);
-
-#ifdef FOTG210_STATS
- fotg210_dbg(fotg210, "irq normal %ld err %ld iaa %ld (lost %ld)\n",
- fotg210->stats.normal, fotg210->stats.error,
- fotg210->stats.iaa, fotg210->stats.lost_iaa);
- fotg210_dbg(fotg210, "complete %ld unlink %ld\n",
- fotg210->stats.complete, fotg210->stats.unlink);
-#endif
-
- dbg_status(fotg210, "fotg210_stop completed",
- fotg210_readl(fotg210, &fotg210->regs->status));
-}
-
-/* one-time init, only for memory state */
-static int hcd_fotg210_init(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- u32 temp;
- int retval;
- u32 hcc_params;
- struct fotg210_qh_hw *hw;
-
- spin_lock_init(&fotg210->lock);
-
- /*
- * keep io watchdog by default, those good HCDs could turn off it later
- */
- fotg210->need_io_watchdog = 1;
-
- hrtimer_setup(&fotg210->hrtimer, fotg210_hrtimer_func, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
- fotg210->next_hrtimer_event = FOTG210_HRTIMER_NO_EVENT;
-
- hcc_params = fotg210_readl(fotg210, &fotg210->caps->hcc_params);
-
- /*
- * by default set standard 80% (== 100 usec/uframe) max periodic
- * bandwidth as required by USB 2.0
- */
- fotg210->uframe_periodic_max = 100;
-
- /*
- * hw default: 1K periodic list heads, one per frame.
- * periodic_size can shrink by USBCMD update if hcc_params allows.
- */
- fotg210->periodic_size = DEFAULT_I_TDPS;
- INIT_LIST_HEAD(&fotg210->intr_qh_list);
- INIT_LIST_HEAD(&fotg210->cached_itd_list);
-
- if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
- /* periodic schedule size can be smaller than default */
- switch (FOTG210_TUNE_FLS) {
- case 0:
- fotg210->periodic_size = 1024;
- break;
- case 1:
- fotg210->periodic_size = 512;
- break;
- case 2:
- fotg210->periodic_size = 256;
- break;
- default:
- BUG();
- }
- }
- retval = fotg210_mem_init(fotg210, GFP_KERNEL);
- if (retval < 0)
- return retval;
-
- /* controllers may cache some of the periodic schedule ... */
- fotg210->i_thresh = 2;
-
- /*
- * dedicate a qh for the async ring head, since we couldn't unlink
- * a 'real' qh without stopping the async schedule [4.8]. use it
- * as the 'reclamation list head' too.
- * its dummy is used in hw_alt_next of many tds, to prevent the qh
- * from automatically advancing to the next td after short reads.
- */
- fotg210->async->qh_next.qh = NULL;
- hw = fotg210->async->hw;
- hw->hw_next = QH_NEXT(fotg210, fotg210->async->qh_dma);
- hw->hw_info1 = cpu_to_hc32(fotg210, QH_HEAD);
- hw->hw_token = cpu_to_hc32(fotg210, QTD_STS_HALT);
- hw->hw_qtd_next = FOTG210_LIST_END(fotg210);
- fotg210->async->qh_state = QH_STATE_LINKED;
- hw->hw_alt_next = QTD_NEXT(fotg210, fotg210->async->dummy->qtd_dma);
-
- /* clear interrupt enables, set irq latency */
- if (log2_irq_thresh < 0 || log2_irq_thresh > 6)
- log2_irq_thresh = 0;
- temp = 1 << (16 + log2_irq_thresh);
- if (HCC_CANPARK(hcc_params)) {
- /* HW default park == 3, on hardware that supports it (like
- * NVidia and ALI silicon), maximizes throughput on the async
- * schedule by avoiding QH fetches between transfers.
- *
- * With fast usb storage devices and NForce2, "park" seems to
- * make problems: throughput reduction (!), data errors...
- */
- if (park) {
- park = min_t(unsigned, park, 3);
- temp |= CMD_PARK;
- temp |= park << 8;
- }
- fotg210_dbg(fotg210, "park %d\n", park);
+ if (fotg->port != GEMINI_PORT_NONE) {
+ /* Work around the Gemini full-speed EOF1 timing erratum. */
+ val = readl(fotg->base + FOTG210_MISC);
+ val &= ~(FOTG210_MISC_EOF1_MASK | FOTG210_MISC_AS_SLP_MASK);
+ val |= FOTG210_MISC_EOF1_720_21000_4000 |
+ FOTG210_MISC_AS_SLP_10US;
+ writel(val, fotg->base + FOTG210_MISC);
}
- if (HCC_PGM_FRAMELISTLEN(hcc_params)) {
- /* periodic schedule size can be smaller than default */
- temp &= ~(3 << 2);
- temp |= (FOTG210_TUNE_FLS << 2);
- }
- fotg210->command = temp;
-
- /* Accept arbitrarily long scatter-gather lists */
- if (!hcd->localmem_pool)
- hcd->self.sg_tablesize = ~0;
- return 0;
-}
-
-/* start HC running; it's halted, hcd_fotg210_init() has been run (once) */
-static int fotg210_run(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- u32 temp;
-
- hcd->uses_new_polling = 1;
-
- /* EHCI spec section 4.1 */
-
- fotg210_writel(fotg210, fotg210->periodic_dma,
- &fotg210->regs->frame_list);
- fotg210_writel(fotg210, (u32)fotg210->async->qh_dma,
- &fotg210->regs->async_next);
-
- /*
- * hcc_params controls whether fotg210->regs->segment must (!!!)
- * be used; it constrains QH/ITD/SITD and QTD locations.
- * dma_pool consistent memory always uses segment zero.
- * streaming mappings for I/O buffers, like dma_map_single(),
- * can return segments above 4GB, if the device allows.
- *
- * NOTE: the dma mask is visible through dev->dma_mask, so
- * drivers can pass this info along ... like NETIF_F_HIGHDMA,
- * Scsi_Host.highmem_io, and so forth. It's readonly to all
- * host side drivers though.
- */
- fotg210_readl(fotg210, &fotg210->caps->hcc_params);
-
- /*
- * Philips, Intel, and maybe others need CMD_RUN before the
- * root hub will detect new devices (why?); NEC doesn't
- */
- fotg210->command &= ~(CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
- fotg210->command |= CMD_RUN;
- fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
- dbg_cmd(fotg210, "init", fotg210->command);
-
- /*
- * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
- * are explicitly handed to companion controller(s), so no TT is
- * involved with the root hub. (Except where one is integrated,
- * and there's no companion controller unless maybe for USB OTG.)
- *
- * Turning on the CF flag will transfer ownership of all ports
- * from the companions to the EHCI controller. If any of the
- * companions are in the middle of a port reset at the time, it
- * could cause trouble. Write-locking ehci_cf_port_reset_rwsem
- * guarantees that no resets are in progress. After we set CF,
- * a short delay lets the hardware catch up; new resets shouldn't
- * be started before the port switching actions could complete.
- */
- down_write(&ehci_cf_port_reset_rwsem);
- fotg210->rh_state = FOTG210_RH_RUNNING;
- /* unblock posted writes */
- fotg210_readl(fotg210, &fotg210->regs->command);
- usleep_range(5000, 10000);
- up_write(&ehci_cf_port_reset_rwsem);
- fotg210->last_periodic_enable = ktime_get_real();
-
- temp = HC_VERSION(fotg210,
- fotg210_readl(fotg210, &fotg210->caps->hc_capbase));
- fotg210_info(fotg210,
- "USB %x.%x started, EHCI %x.%02x\n",
- ((fotg210->sbrn & 0xf0) >> 4), (fotg210->sbrn & 0x0f),
- temp >> 8, temp & 0xff);
-
- fotg210_writel(fotg210, INTR_MASK,
- &fotg210->regs->intr_enable); /* Turn On Interrupts */
-
- /* GRR this is run-once init(), being done every time the HC starts.
- * So long as they're part of class devices, we can't do it init()
- * since the class device isn't created that early.
- */
- create_debug_files(fotg210);
- create_sysfs_files(fotg210);
-
- return 0;
-}
-
-static int fotg210_setup(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- int retval;
-
- fotg210->regs = (void __iomem *)fotg210->caps +
- HC_LENGTH(fotg210,
- fotg210_readl(fotg210, &fotg210->caps->hc_capbase));
- dbg_hcs_params(fotg210, "reset");
- dbg_hcc_params(fotg210, "reset");
-
- /* cache this readonly data; minimize chip reads */
- fotg210->hcs_params = fotg210_readl(fotg210,
- &fotg210->caps->hcs_params);
-
- fotg210->sbrn = HCD_USB2;
-
- /* data structure init */
- retval = hcd_fotg210_init(hcd);
- if (retval)
- return retval;
-
- retval = fotg210_halt(fotg210);
- if (retval)
- return retval;
-
- fotg210_reset(fotg210);
return 0;
}
-static irqreturn_t fotg210_irq(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- u32 status, masked_status, pcd_status = 0, cmd;
- int bh;
-
- spin_lock(&fotg210->lock);
-
- status = fotg210_readl(fotg210, &fotg210->regs->status);
-
- /* e.g. cardbus physical eject */
- if (status == ~(u32) 0) {
- fotg210_dbg(fotg210, "device removed\n");
- goto dead;
- }
-
- /*
- * We don't use STS_FLR, but some controllers don't like it to
- * remain on, so mask it out along with the other status bits.
- */
- masked_status = status & (INTR_MASK | STS_FLR);
-
- /* Shared IRQ? */
- if (!masked_status ||
- unlikely(fotg210->rh_state == FOTG210_RH_HALTED)) {
- spin_unlock(&fotg210->lock);
- return IRQ_NONE;
- }
-
- /* clear (just) interrupts */
- fotg210_writel(fotg210, masked_status, &fotg210->regs->status);
- cmd = fotg210_readl(fotg210, &fotg210->regs->command);
- bh = 0;
-
- /* unrequested/ignored: Frame List Rollover */
- dbg_status(fotg210, "irq", status);
-
- /* INT, ERR, and IAA interrupt rates can be throttled */
-
- /* normal [4.15.1.2] or error [4.15.1.1] completion */
- if (likely((status & (STS_INT|STS_ERR)) != 0)) {
- if (likely((status & STS_ERR) == 0))
- INCR(fotg210->stats.normal);
- else
- INCR(fotg210->stats.error);
- bh = 1;
- }
-
- /* complete the unlinking of some qh [4.15.2.3] */
- if (status & STS_IAA) {
-
- /* Turn off the IAA watchdog */
- fotg210->enabled_hrtimer_events &=
- ~BIT(FOTG210_HRTIMER_IAA_WATCHDOG);
-
- /*
- * Mild optimization: Allow another IAAD to reset the
- * hrtimer, if one occurs before the next expiration.
- * In theory we could always cancel the hrtimer, but
- * tests show that about half the time it will be reset
- * for some other event anyway.
- */
- if (fotg210->next_hrtimer_event == FOTG210_HRTIMER_IAA_WATCHDOG)
- ++fotg210->next_hrtimer_event;
-
- /* guard against (alleged) silicon errata */
- if (cmd & CMD_IAAD)
- fotg210_dbg(fotg210, "IAA with IAAD still set?\n");
- if (fotg210->async_iaa) {
- INCR(fotg210->stats.iaa);
- end_unlink_async(fotg210);
- } else
- fotg210_dbg(fotg210, "IAA with nothing unlinked?\n");
- }
-
- /* remote wakeup [4.3.1] */
- if (status & STS_PCD) {
- int pstatus;
- u32 __iomem *status_reg = &fotg210->regs->port_status;
-
- /* kick root hub later */
- pcd_status = status;
-
- /* resume root hub? */
- if (fotg210->rh_state == FOTG210_RH_SUSPENDED)
- usb_hcd_resume_root_hub(hcd);
-
- pstatus = fotg210_readl(fotg210, status_reg);
-
- if (test_bit(0, &fotg210->suspended_ports) &&
- ((pstatus & PORT_RESUME) ||
- !(pstatus & PORT_SUSPEND)) &&
- (pstatus & PORT_PE) &&
- fotg210->reset_done[0] == 0) {
-
- /* start 20 msec resume signaling from this port,
- * and make hub_wq collect PORT_STAT_C_SUSPEND to
- * stop that signaling. Use 5 ms extra for safety,
- * like usb_port_resume() does.
- */
- fotg210->reset_done[0] = jiffies + msecs_to_jiffies(25);
- set_bit(0, &fotg210->resuming_ports);
- fotg210_dbg(fotg210, "port 1 remote wakeup\n");
- mod_timer(&hcd->rh_timer, fotg210->reset_done[0]);
- }
- }
-
- /* PCI errors [4.15.2.4] */
- if (unlikely((status & STS_FATAL) != 0)) {
- fotg210_err(fotg210, "fatal error\n");
- dbg_cmd(fotg210, "fatal", cmd);
- dbg_status(fotg210, "fatal", status);
-dead:
- usb_hc_died(hcd);
-
- /* Don't let the controller do anything more */
- fotg210->shutdown = true;
- fotg210->rh_state = FOTG210_RH_STOPPING;
- fotg210->command &= ~(CMD_RUN | CMD_ASE | CMD_PSE);
- fotg210_writel(fotg210, fotg210->command,
- &fotg210->regs->command);
- fotg210_writel(fotg210, 0, &fotg210->regs->intr_enable);
- fotg210_handle_controller_death(fotg210);
-
- /* Handle completions when the controller stops */
- bh = 0;
- }
-
- if (bh)
- fotg210_work(fotg210);
- spin_unlock(&fotg210->lock);
- if (pcd_status)
- usb_hcd_poll_rh_status(hcd);
- return IRQ_HANDLED;
-}
-
-/* non-error returns are a promise to giveback() the urb later
- * we drop ownership so next owner (or urb unlink) can get it
- *
- * urb + dev is in hcd.self.controller.urb_list
- * we're queueing TDs onto software and hardware lists
- *
- * hcd-specific init for hcpriv hasn't been done yet
- *
- * NOTE: control, bulk, and interrupt share the same code to append TDs
- * to a (possibly active) QH, and the same QH scanning code.
- */
-static int fotg210_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
- gfp_t mem_flags)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- struct list_head qtd_list;
-
- INIT_LIST_HEAD(&qtd_list);
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- /* qh_completions() code doesn't handle all the fault cases
- * in multi-TD control transfers. Even 1KB is rare anyway.
- */
- if (urb->transfer_buffer_length > (16 * 1024))
- return -EMSGSIZE;
- fallthrough;
- /* case PIPE_BULK: */
- default:
- if (!qh_urb_transaction(fotg210, urb, &qtd_list, mem_flags))
- return -ENOMEM;
- return submit_async(fotg210, urb, &qtd_list, mem_flags);
-
- case PIPE_INTERRUPT:
- if (!qh_urb_transaction(fotg210, urb, &qtd_list, mem_flags))
- return -ENOMEM;
- return intr_submit(fotg210, urb, &qtd_list, mem_flags);
-
- case PIPE_ISOCHRONOUS:
- return itd_submit(fotg210, urb, mem_flags);
- }
-}
-
-/* remove from hardware lists
- * completions normally happen asynchronously
- */
-
-static int fotg210_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- struct fotg210_qh *qh;
- unsigned long flags;
- int rc;
-
- spin_lock_irqsave(&fotg210->lock, flags);
- rc = usb_hcd_check_unlink_urb(hcd, urb, status);
- if (rc)
- goto done;
-
- switch (usb_pipetype(urb->pipe)) {
- /* case PIPE_CONTROL: */
- /* case PIPE_BULK:*/
- default:
- qh = (struct fotg210_qh *) urb->hcpriv;
- if (!qh)
- break;
- switch (qh->qh_state) {
- case QH_STATE_LINKED:
- case QH_STATE_COMPLETING:
- start_unlink_async(fotg210, qh);
- break;
- case QH_STATE_UNLINK:
- case QH_STATE_UNLINK_WAIT:
- /* already started */
- break;
- case QH_STATE_IDLE:
- /* QH might be waiting for a Clear-TT-Buffer */
- qh_completions(fotg210, qh);
- break;
- }
- break;
-
- case PIPE_INTERRUPT:
- qh = (struct fotg210_qh *) urb->hcpriv;
- if (!qh)
- break;
- switch (qh->qh_state) {
- case QH_STATE_LINKED:
- case QH_STATE_COMPLETING:
- start_unlink_intr(fotg210, qh);
- break;
- case QH_STATE_IDLE:
- qh_completions(fotg210, qh);
- break;
- default:
- fotg210_dbg(fotg210, "bogus qh %p state %d\n",
- qh, qh->qh_state);
- goto done;
- }
- break;
-
- case PIPE_ISOCHRONOUS:
- /* itd... */
-
- /* wait till next completion, do it then. */
- /* completion irqs can wait up to 1024 msec, */
- break;
- }
-done:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- return rc;
-}
-
-/* bulk qh holds the data toggle */
-
-static void fotg210_endpoint_disable(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- unsigned long flags;
- struct fotg210_qh *qh, *tmp;
-
- /* ASSERT: any requests/urbs are being unlinked */
- /* ASSERT: nobody can be submitting urbs for this any more */
-
-rescan:
- spin_lock_irqsave(&fotg210->lock, flags);
- qh = ep->hcpriv;
- if (!qh)
- goto done;
-
- /* endpoints can be iso streams. for now, we don't
- * accelerate iso completions ... so spin a while.
- */
- if (qh->hw == NULL) {
- struct fotg210_iso_stream *stream = ep->hcpriv;
-
- if (!list_empty(&stream->td_list))
- goto idle_timeout;
-
- /* BUG_ON(!list_empty(&stream->free_list)); */
- kfree(stream);
- goto done;
- }
-
- if (fotg210->rh_state < FOTG210_RH_RUNNING)
- qh->qh_state = QH_STATE_IDLE;
- switch (qh->qh_state) {
- case QH_STATE_LINKED:
- case QH_STATE_COMPLETING:
- for (tmp = fotg210->async->qh_next.qh;
- tmp && tmp != qh;
- tmp = tmp->qh_next.qh)
- continue;
- /* periodic qh self-unlinks on empty, and a COMPLETING qh
- * may already be unlinked.
- */
- if (tmp)
- start_unlink_async(fotg210, qh);
- fallthrough;
- case QH_STATE_UNLINK: /* wait for hw to finish? */
- case QH_STATE_UNLINK_WAIT:
-idle_timeout:
- spin_unlock_irqrestore(&fotg210->lock, flags);
- schedule_timeout_uninterruptible(1);
- goto rescan;
- case QH_STATE_IDLE: /* fully unlinked */
- if (qh->clearing_tt)
- goto idle_timeout;
- if (list_empty(&qh->qtd_list)) {
- qh_destroy(fotg210, qh);
- break;
- }
- fallthrough;
- default:
- /* caller was supposed to have unlinked any requests;
- * that's not our job. just leak this memory.
- */
- fotg210_err(fotg210, "qh %p (#%02x) state %d%s\n",
- qh, ep->desc.bEndpointAddress, qh->qh_state,
- list_empty(&qh->qtd_list) ? "" : "(has tds)");
- break;
- }
-done:
- ep->hcpriv = NULL;
- spin_unlock_irqrestore(&fotg210->lock, flags);
-}
-
-static void fotg210_endpoint_reset(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
- struct fotg210_qh *qh;
- int eptype = usb_endpoint_type(&ep->desc);
- int epnum = usb_endpoint_num(&ep->desc);
- int is_out = usb_endpoint_dir_out(&ep->desc);
- unsigned long flags;
-
- if (eptype != USB_ENDPOINT_XFER_BULK && eptype != USB_ENDPOINT_XFER_INT)
- return;
-
- spin_lock_irqsave(&fotg210->lock, flags);
- qh = ep->hcpriv;
-
- /* For Bulk and Interrupt endpoints we maintain the toggle state
- * in the hardware; the toggle bits in udev aren't used at all.
- * When an endpoint is reset by usb_clear_halt() we must reset
- * the toggle bit in the QH.
- */
- if (qh) {
- usb_settoggle(qh->dev, epnum, is_out, 0);
- if (!list_empty(&qh->qtd_list)) {
- WARN_ONCE(1, "clear_halt for a busy endpoint\n");
- } else if (qh->qh_state == QH_STATE_LINKED ||
- qh->qh_state == QH_STATE_COMPLETING) {
-
- /* The toggle value in the QH can't be updated
- * while the QH is active. Unlink it now;
- * re-linking will call qh_refresh().
- */
- if (eptype == USB_ENDPOINT_XFER_BULK)
- start_unlink_async(fotg210, qh);
- else
- start_unlink_intr(fotg210, qh);
- }
- }
- spin_unlock_irqrestore(&fotg210->lock, flags);
-}
-
-static int fotg210_get_frame(struct usb_hcd *hcd)
-{
- struct fotg210_hcd *fotg210 = hcd_to_fotg210(hcd);
-
- return (fotg210_read_frame_index(fotg210) >> 3) %
- fotg210->periodic_size;
-}
-
-/* The EHCI in ChipIdea HDRC cannot be a separate module or device,
- * because its registers (and irq) are shared between host/gadget/otg
- * functions and in order to facilitate role switching we cannot
- * give the fotg210 driver exclusive access to those.
- */
-
-static const struct hc_driver fotg210_fotg210_hc_driver = {
- .description = hcd_name,
- .product_desc = "Faraday USB2.0 Host Controller",
- .hcd_priv_size = sizeof(struct fotg210_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = fotg210_irq,
- .flags = HCD_MEMORY | HCD_DMA | HCD_USB2,
-
- /*
- * basic lifecycle operations
- */
- .reset = hcd_fotg210_init,
- .start = fotg210_run,
- .stop = fotg210_stop,
- .shutdown = fotg210_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = fotg210_urb_enqueue,
- .urb_dequeue = fotg210_urb_dequeue,
- .endpoint_disable = fotg210_endpoint_disable,
- .endpoint_reset = fotg210_endpoint_reset,
-
- /*
- * scheduling support
- */
- .get_frame_number = fotg210_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = fotg210_hub_status_data,
- .hub_control = fotg210_hub_control,
- .bus_suspend = fotg210_bus_suspend,
- .bus_resume = fotg210_bus_resume,
-
- .relinquish_port = fotg210_relinquish_port,
- .port_handed_over = fotg210_port_handed_over,
-
- .clear_tt_buffer_complete = fotg210_clear_tt_buffer_complete,
+static const struct ehci_driver_overrides fotg210_hc_overrides __initconst = {
+ .reset = fotg210_hcd_reset,
+ .extra_priv_size = sizeof(struct fotg210_hcd),
};
-static void fotg210_init(struct fotg210_hcd *fotg210)
-{
- u32 value;
-
- iowrite32(GMIR_MDEV_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY,
- &fotg210->regs->gmir);
-
- value = ioread32(&fotg210->regs->otgcsr);
- value &= ~OTGCSR_A_BUS_DROP;
- value |= OTGCSR_A_BUS_REQ;
- iowrite32(value, &fotg210->regs->otgcsr);
-}
-
/*
* fotg210_hcd_probe - initialize faraday FOTG210 HCDs
*
@@ -5554,57 +134,39 @@ int fotg210_hcd_probe(struct platform_device *pdev, struct fotg210 *fotg)
struct device *dev = &pdev->dev;
struct usb_hcd *hcd;
int irq;
- int retval;
- struct fotg210_hcd *fotg210;
+ int ret;
if (usb_disabled())
return -ENODEV;
- pdev->dev.power.power_state = PMSG_ON;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- hcd = usb_create_hcd(&fotg210_fotg210_hc_driver, dev,
- dev_name(dev));
- if (!hcd) {
- retval = dev_err_probe(dev, -ENOMEM, "failed to create hcd\n");
- goto fail_create_hcd;
- }
-
- hcd->has_tt = 1;
-
- hcd->regs = fotg->base;
+ hcd = usb_create_hcd(&fotg210_hc_driver, dev, dev_name(dev));
+ if (!hcd)
+ return dev_err_probe(dev, -ENOMEM, "failed to create hcd\n");
hcd->rsrc_start = fotg->res->start;
hcd->rsrc_len = resource_size(fotg->res);
+ hcd->regs = fotg->base;
+ hcd_to_fotg210_priv(hcd)->fotg = fotg;
+ hcd_to_ehci(hcd)->caps = fotg->base;
- fotg210 = hcd_to_fotg210(hcd);
-
- fotg210->fotg = fotg;
- fotg210->caps = hcd->regs;
-
- retval = fotg210_setup(hcd);
- if (retval)
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = irq;
goto failed_put_hcd;
+ }
- fotg210_init(fotg210);
-
- retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
- if (retval) {
- dev_err_probe(dev, retval, "failed to add hcd\n");
+ ret = usb_add_hcd(hcd, irq, 0);
+ if (ret) {
+ dev_err_probe(dev, ret, "failed to add HCD\n");
goto failed_put_hcd;
}
device_wakeup_enable(hcd->self.controller);
- platform_set_drvdata(pdev, hcd);
- return retval;
+ return ret;
failed_put_hcd:
usb_put_hcd(hcd);
-fail_create_hcd:
- return dev_err_probe(dev, retval, "init %s fail\n", dev_name(dev));
+ return ret;
}
/*
@@ -5615,29 +177,43 @@ int fotg210_hcd_probe(struct platform_device *pdev, struct fotg210 *fotg)
int fotg210_hcd_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct fotg210 *fotg = hcd_to_fotg210_priv(hcd)->fotg;
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
+ fotg210_vbus(fotg, false);
return 0;
}
-int __init fotg210_hcd_init(void)
+int fotg210_hcd_suspend(struct device *dev)
{
- if (usb_disabled())
- return -ENODEV;
+#ifdef CONFIG_PM
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ return ehci_suspend(hcd, device_may_wakeup(dev));
+#else
+ return 0;
+#endif
+}
- pr_debug("%s: block sizes: qh %zd qtd %zd itd %zd\n",
- hcd_name, sizeof(struct fotg210_qh),
- sizeof(struct fotg210_qtd),
- sizeof(struct fotg210_itd));
+int fotg210_hcd_resume(struct device *dev)
+{
+#ifdef CONFIG_PM
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
- fotg210_debug_root = debugfs_create_dir("fotg210", usb_debug_root);
+ return ehci_resume(hcd, false);
+#else
+ return 0;
+#endif
+}
+int __init fotg210_hcd_init(void)
+{
+ ehci_init_driver(&fotg210_hc_driver, &fotg210_hc_overrides);
return 0;
}
-void __exit fotg210_hcd_cleanup(void)
+void fotg210_hcd_cleanup(void)
{
- debugfs_remove(fotg210_debug_root);
}
diff --git a/drivers/usb/fotg210/fotg210-hcd.h b/drivers/usb/fotg210/fotg210-hcd.h
deleted file mode 100644
index 13c9342982ee..000000000000
--- a/drivers/usb/fotg210/fotg210-hcd.h
+++ /dev/null
@@ -1,689 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_FOTG210_H
-#define __LINUX_FOTG210_H
-
-#include <linux/usb/ehci-dbgp.h>
-
-/* definitions used for the EHCI driver */
-
-/*
- * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
- * __leXX (normally) or __beXX (given FOTG210_BIG_ENDIAN_DESC), depending on
- * the host controller implementation.
- *
- * To facilitate the strongest possible byte-order checking from "sparse"
- * and so on, we use __leXX unless that's not practical.
- */
-#define __hc32 __le32
-#define __hc16 __le16
-
-/* statistics can be kept for tuning/monitoring */
-struct fotg210_stats {
- /* irq usage */
- unsigned long normal;
- unsigned long error;
- unsigned long iaa;
- unsigned long lost_iaa;
-
- /* termination of urbs from core */
- unsigned long complete;
- unsigned long unlink;
-};
-
-/* fotg210_hcd->lock guards shared data against other CPUs:
- * fotg210_hcd: async, unlink, periodic (and shadow), ...
- * usb_host_endpoint: hcpriv
- * fotg210_qh: qh_next, qtd_list
- * fotg210_qtd: qtd_list
- *
- * Also, hold this lock when talking to HC registers or
- * when updating hw_* fields in shared qh/qtd/... structures.
- */
-
-#define FOTG210_MAX_ROOT_PORTS 1 /* see HCS_N_PORTS */
-
-/*
- * fotg210_rh_state values of FOTG210_RH_RUNNING or above mean that the
- * controller may be doing DMA. Lower values mean there's no DMA.
- */
-enum fotg210_rh_state {
- FOTG210_RH_HALTED,
- FOTG210_RH_SUSPENDED,
- FOTG210_RH_RUNNING,
- FOTG210_RH_STOPPING
-};
-
-/*
- * Timer events, ordered by increasing delay length.
- * Always update event_delays_ns[] and event_handlers[] (defined in
- * ehci-timer.c) in parallel with this list.
- */
-enum fotg210_hrtimer_event {
- FOTG210_HRTIMER_POLL_ASS, /* Poll for async schedule off */
- FOTG210_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */
- FOTG210_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */
- FOTG210_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */
- FOTG210_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */
- FOTG210_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */
- FOTG210_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */
- FOTG210_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */
- FOTG210_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */
- FOTG210_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */
- FOTG210_HRTIMER_NUM_EVENTS /* Must come last */
-};
-#define FOTG210_HRTIMER_NO_EVENT 99
-
-struct fotg210_hcd { /* one per controller */
- /* timing support */
- enum fotg210_hrtimer_event next_hrtimer_event;
- unsigned enabled_hrtimer_events;
- ktime_t hr_timeouts[FOTG210_HRTIMER_NUM_EVENTS];
- struct hrtimer hrtimer;
-
- int PSS_poll_count;
- int ASS_poll_count;
- int died_poll_count;
-
- /* glue to PCI and HCD framework */
- struct fotg210_caps __iomem *caps;
- struct fotg210_regs __iomem *regs;
- struct ehci_dbg_port __iomem *debug;
-
- __u32 hcs_params; /* cached register copy */
- spinlock_t lock;
- enum fotg210_rh_state rh_state;
-
- /* general schedule support */
- bool scanning:1;
- bool need_rescan:1;
- bool intr_unlinking:1;
- bool async_unlinking:1;
- bool shutdown:1;
- struct fotg210_qh *qh_scan_next;
-
- /* async schedule support */
- struct fotg210_qh *async;
- struct fotg210_qh *dummy; /* For AMD quirk use */
- struct fotg210_qh *async_unlink;
- struct fotg210_qh *async_unlink_last;
- struct fotg210_qh *async_iaa;
- unsigned async_unlink_cycle;
- unsigned async_count; /* async activity count */
-
- /* periodic schedule support */
-#define DEFAULT_I_TDPS 1024 /* some HCs can do less */
- unsigned periodic_size;
- __hc32 *periodic; /* hw periodic table */
- dma_addr_t periodic_dma;
- struct list_head intr_qh_list;
- unsigned i_thresh; /* uframes HC might cache */
-
- union fotg210_shadow *pshadow; /* mirror hw periodic table */
- struct fotg210_qh *intr_unlink;
- struct fotg210_qh *intr_unlink_last;
- unsigned intr_unlink_cycle;
- unsigned now_frame; /* frame from HC hardware */
- unsigned next_frame; /* scan periodic, start here */
- unsigned intr_count; /* intr activity count */
- unsigned isoc_count; /* isoc activity count */
- unsigned periodic_count; /* periodic activity count */
- /* max periodic time per uframe */
- unsigned uframe_periodic_max;
-
-
- /* list of itds completed while now_frame was still active */
- struct list_head cached_itd_list;
- struct fotg210_itd *last_itd_to_free;
-
- /* per root hub port */
- unsigned long reset_done[FOTG210_MAX_ROOT_PORTS];
-
- /* bit vectors (one bit per port)
- * which ports were already suspended at the start of a bus suspend
- */
- unsigned long bus_suspended;
-
- /* which ports are edicated to the companion controller */
- unsigned long companion_ports;
-
- /* which ports are owned by the companion during a bus suspend */
- unsigned long owned_ports;
-
- /* which ports have the change-suspend feature turned on */
- unsigned long port_c_suspend;
-
- /* which ports are suspended */
- unsigned long suspended_ports;
-
- /* which ports have started to resume */
- unsigned long resuming_ports;
-
- /* per-HC memory pools (could be per-bus, but ...) */
- struct dma_pool *qh_pool; /* qh per active urb */
- struct dma_pool *qtd_pool; /* one or more per qh */
- struct dma_pool *itd_pool; /* itd per iso urb */
-
- unsigned random_frame;
- unsigned long next_statechange;
- ktime_t last_periodic_enable;
- u32 command;
-
- /* SILICON QUIRKS */
- unsigned need_io_watchdog:1;
- unsigned fs_i_thresh:1; /* Intel iso scheduling */
-
- u8 sbrn; /* packed release number */
-
- /* irq statistics */
-#ifdef FOTG210_STATS
- struct fotg210_stats stats;
-# define INCR(x) ((x)++)
-#else
-# define INCR(x) do {} while (0)
-#endif
-
- struct fotg210 *fotg; /* Overarching FOTG210 device */
- /* silicon clock */
- struct clk *pclk;
-};
-
-/* convert between an HCD pointer and the corresponding FOTG210_HCD */
-static inline struct fotg210_hcd *hcd_to_fotg210(struct usb_hcd *hcd)
-{
- return (struct fotg210_hcd *)(hcd->hcd_priv);
-}
-static inline struct usb_hcd *fotg210_to_hcd(struct fotg210_hcd *fotg210)
-{
- return container_of((void *) fotg210, struct usb_hcd, hcd_priv);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
-
-/* Section 2.2 Host Controller Capability Registers */
-struct fotg210_caps {
- /* these fields are specified as 8 and 16 bit registers,
- * but some hosts can't perform 8 or 16 bit PCI accesses.
- * some hosts treat caplength and hciversion as parts of a 32-bit
- * register, others treat them as two separate registers, this
- * affects the memory map for big endian controllers.
- */
- u32 hc_capbase;
-#define HC_LENGTH(fotg210, p) (0x00ff&((p) >> /* bits 7:0 / offset 00h */ \
- (fotg210_big_endian_capbase(fotg210) ? 24 : 0)))
-#define HC_VERSION(fotg210, p) (0xffff&((p) >> /* bits 31:16 / offset 02h */ \
- (fotg210_big_endian_capbase(fotg210) ? 0 : 16)))
- u32 hcs_params; /* HCSPARAMS - offset 0x4 */
-#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
-
- u32 hcc_params; /* HCCPARAMS - offset 0x8 */
-#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */
-#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/
- u8 portroute[8]; /* nibbles for routing - offset 0xC */
-};
-
-
-/* Section 2.3 Host Controller Operational Registers */
-struct fotg210_regs {
-
- /* USBCMD: offset 0x00 */
- u32 command;
-
-/* EHCI 1.1 addendum */
-/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
-#define CMD_PARK (1<<11) /* enable "park" on async qh */
-#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */
-#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */
-#define CMD_ASE (1<<5) /* async schedule enable */
-#define CMD_PSE (1<<4) /* periodic schedule enable */
-/* 3:2 is periodic frame list size */
-#define CMD_RESET (1<<1) /* reset HC not bus */
-#define CMD_RUN (1<<0) /* start/stop HC */
-
- /* USBSTS: offset 0x04 */
- u32 status;
-#define STS_ASS (1<<15) /* Async Schedule Status */
-#define STS_PSS (1<<14) /* Periodic Schedule Status */
-#define STS_RECL (1<<13) /* Reclamation */
-#define STS_HALT (1<<12) /* Not running (any reason) */
-/* some bits reserved */
- /* these STS_* flags are also intr_enable bits (USBINTR) */
-#define STS_IAA (1<<5) /* Interrupted on async advance */
-#define STS_FATAL (1<<4) /* such as some PCI access errors */
-#define STS_FLR (1<<3) /* frame list rolled over */
-#define STS_PCD (1<<2) /* port change detect */
-#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */
-#define STS_INT (1<<0) /* "normal" completion (short, ...) */
-
- /* USBINTR: offset 0x08 */
- u32 intr_enable;
-
- /* FRINDEX: offset 0x0C */
- u32 frame_index; /* current microframe number */
- /* CTRLDSSEGMENT: offset 0x10 */
- u32 segment; /* address bits 63:32 if needed */
- /* PERIODICLISTBASE: offset 0x14 */
- u32 frame_list; /* points to periodic list */
- /* ASYNCLISTADDR: offset 0x18 */
- u32 async_next; /* address of next async queue head */
-
- u32 reserved1;
- /* PORTSC: offset 0x20 */
- u32 port_status;
-/* 31:23 reserved */
-#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10)) /* USB 1.1 device */
-#define PORT_RESET (1<<8) /* reset port */
-#define PORT_SUSPEND (1<<7) /* suspend port */
-#define PORT_RESUME (1<<6) /* resume it */
-#define PORT_PEC (1<<3) /* port enable change */
-#define PORT_PE (1<<2) /* port enable */
-#define PORT_CSC (1<<1) /* connect status change */
-#define PORT_CONNECT (1<<0) /* device connected */
-#define PORT_RWC_BITS (PORT_CSC | PORT_PEC)
- u32 reserved2[19];
-
- /* OTGCSR: offet 0x70 */
- u32 otgcsr;
-#define OTGCSR_HOST_SPD_TYP (3 << 22)
-#define OTGCSR_A_BUS_DROP (1 << 5)
-#define OTGCSR_A_BUS_REQ (1 << 4)
-
- /* OTGISR: offset 0x74 */
- u32 otgisr;
-#define OTGISR_OVC (1 << 10)
-
- u32 reserved3[15];
-
- /* GMIR: offset 0xB4 */
- u32 gmir;
-#define GMIR_INT_POLARITY (1 << 3) /*Active High*/
-#define GMIR_MHC_INT (1 << 2)
-#define GMIR_MOTG_INT (1 << 1)
-#define GMIR_MDEV_INT (1 << 0)
-};
-
-/*-------------------------------------------------------------------------*/
-
-#define QTD_NEXT(fotg210, dma) cpu_to_hc32(fotg210, (u32)dma)
-
-/*
- * EHCI Specification 0.95 Section 3.5
- * QTD: describe data transfer components (buffer, direction, ...)
- * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
- *
- * These are associated only with "QH" (Queue Head) structures,
- * used with control, bulk, and interrupt transfers.
- */
-struct fotg210_qtd {
- /* first part defined by EHCI spec */
- __hc32 hw_next; /* see EHCI 3.5.1 */
- __hc32 hw_alt_next; /* see EHCI 3.5.2 */
- __hc32 hw_token; /* see EHCI 3.5.3 */
-#define QTD_TOGGLE (1 << 31) /* data toggle */
-#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
-#define QTD_IOC (1 << 15) /* interrupt on complete */
-#define QTD_CERR(tok) (((tok)>>10) & 0x3)
-#define QTD_PID(tok) (((tok)>>8) & 0x3)
-#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
-#define QTD_STS_HALT (1 << 6) /* halted on error */
-#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
-#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
-#define QTD_STS_XACT (1 << 3) /* device gave illegal response */
-#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
-#define QTD_STS_STS (1 << 1) /* split transaction state */
-#define QTD_STS_PING (1 << 0) /* issue PING? */
-
-#define ACTIVE_BIT(fotg210) cpu_to_hc32(fotg210, QTD_STS_ACTIVE)
-#define HALT_BIT(fotg210) cpu_to_hc32(fotg210, QTD_STS_HALT)
-#define STATUS_BIT(fotg210) cpu_to_hc32(fotg210, QTD_STS_STS)
-
- __hc32 hw_buf[5]; /* see EHCI 3.5.4 */
- __hc32 hw_buf_hi[5]; /* Appendix B */
-
- /* the rest is HCD-private */
- dma_addr_t qtd_dma; /* qtd address */
- struct list_head qtd_list; /* sw qtd list */
- struct urb *urb; /* qtd's urb */
- size_t length; /* length of buffer */
-} __aligned(32);
-
-/* mask NakCnt+T in qh->hw_alt_next */
-#define QTD_MASK(fotg210) cpu_to_hc32(fotg210, ~0x1f)
-
-#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
-
-/*-------------------------------------------------------------------------*/
-
-/* type tag from {qh,itd,fstn}->hw_next */
-#define Q_NEXT_TYPE(fotg210, dma) ((dma) & cpu_to_hc32(fotg210, 3 << 1))
-
-/*
- * Now the following defines are not converted using the
- * cpu_to_le32() macro anymore, since we have to support
- * "dynamic" switching between be and le support, so that the driver
- * can be used on one system with SoC EHCI controller using big-endian
- * descriptors as well as a normal little-endian PCI EHCI controller.
- */
-/* values for that type tag */
-#define Q_TYPE_ITD (0 << 1)
-#define Q_TYPE_QH (1 << 1)
-#define Q_TYPE_SITD (2 << 1)
-#define Q_TYPE_FSTN (3 << 1)
-
-/* next async queue entry, or pointer to interrupt/periodic QH */
-#define QH_NEXT(fotg210, dma) \
- (cpu_to_hc32(fotg210, (((u32)dma)&~0x01f)|Q_TYPE_QH))
-
-/* for periodic/async schedules and qtd lists, mark end of list */
-#define FOTG210_LIST_END(fotg210) \
- cpu_to_hc32(fotg210, 1) /* "null pointer" to hw */
-
-/*
- * Entries in periodic shadow table are pointers to one of four kinds
- * of data structure. That's dictated by the hardware; a type tag is
- * encoded in the low bits of the hardware's periodic schedule. Use
- * Q_NEXT_TYPE to get the tag.
- *
- * For entries in the async schedule, the type tag always says "qh".
- */
-union fotg210_shadow {
- struct fotg210_qh *qh; /* Q_TYPE_QH */
- struct fotg210_itd *itd; /* Q_TYPE_ITD */
- struct fotg210_fstn *fstn; /* Q_TYPE_FSTN */
- __hc32 *hw_next; /* (all types) */
- void *ptr;
-};
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * EHCI Specification 0.95 Section 3.6
- * QH: describes control/bulk/interrupt endpoints
- * See Fig 3-7 "Queue Head Structure Layout".
- *
- * These appear in both the async and (for interrupt) periodic schedules.
- */
-
-/* first part defined by EHCI spec */
-struct fotg210_qh_hw {
- __hc32 hw_next; /* see EHCI 3.6.1 */
- __hc32 hw_info1; /* see EHCI 3.6.2 */
-#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
-#define QH_HEAD (1 << 15) /* Head of async reclamation list */
-#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
-#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
-#define QH_LOW_SPEED (1 << 12)
-#define QH_FULL_SPEED (0 << 12)
-#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
- __hc32 hw_info2; /* see EHCI 3.6.2 */
-#define QH_SMASK 0x000000ff
-#define QH_CMASK 0x0000ff00
-#define QH_HUBADDR 0x007f0000
-#define QH_HUBPORT 0x3f800000
-#define QH_MULT 0xc0000000
- __hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
-
- /* qtd overlay (hardware parts of a struct fotg210_qtd) */
- __hc32 hw_qtd_next;
- __hc32 hw_alt_next;
- __hc32 hw_token;
- __hc32 hw_buf[5];
- __hc32 hw_buf_hi[5];
-} __aligned(32);
-
-struct fotg210_qh {
- struct fotg210_qh_hw *hw; /* Must come first */
- /* the rest is HCD-private */
- dma_addr_t qh_dma; /* address of qh */
- union fotg210_shadow qh_next; /* ptr to qh; or periodic */
- struct list_head qtd_list; /* sw qtd list */
- struct list_head intr_node; /* list of intr QHs */
- struct fotg210_qtd *dummy;
- struct fotg210_qh *unlink_next; /* next on unlink list */
-
- unsigned unlink_cycle;
-
- u8 needs_rescan; /* Dequeue during giveback */
- u8 qh_state;
-#define QH_STATE_LINKED 1 /* HC sees this */
-#define QH_STATE_UNLINK 2 /* HC may still see this */
-#define QH_STATE_IDLE 3 /* HC doesn't see this */
-#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
-#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
-
- u8 xacterrs; /* XactErr retry counter */
-#define QH_XACTERR_MAX 32 /* XactErr retry limit */
-
- /* periodic schedule info */
- u8 usecs; /* intr bandwidth */
- u8 gap_uf; /* uframes split/csplit gap */
- u8 c_usecs; /* ... split completion bw */
- u16 tt_usecs; /* tt downstream bandwidth */
- unsigned short period; /* polling interval */
- unsigned short start; /* where polling starts */
-#define NO_FRAME ((unsigned short)~0) /* pick new start */
-
- struct usb_device *dev; /* access to TT */
- unsigned is_out:1; /* bulk or intr OUT */
- unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
-};
-
-/*-------------------------------------------------------------------------*/
-
-/* description of one iso transaction (up to 3 KB data if highspeed) */
-struct fotg210_iso_packet {
- /* These will be copied to iTD when scheduling */
- u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
- __hc32 transaction; /* itd->hw_transaction[i] |= */
- u8 cross; /* buf crosses pages */
- /* for full speed OUT splits */
- u32 buf1;
-};
-
-/* temporary schedule data for packets from iso urbs (both speeds)
- * each packet is one logical usb transaction to the device (not TT),
- * beginning at stream->next_uframe
- */
-struct fotg210_iso_sched {
- struct list_head td_list;
- unsigned span;
- struct fotg210_iso_packet packet[];
-};
-
-/*
- * fotg210_iso_stream - groups all (s)itds for this endpoint.
- * acts like a qh would, if EHCI had them for ISO.
- */
-struct fotg210_iso_stream {
- /* first field matches fotg210_hq, but is NULL */
- struct fotg210_qh_hw *hw;
-
- u8 bEndpointAddress;
- u8 highspeed;
- struct list_head td_list; /* queued itds */
- struct list_head free_list; /* list of unused itds */
- struct usb_device *udev;
- struct usb_host_endpoint *ep;
-
- /* output of (re)scheduling */
- int next_uframe;
- __hc32 splits;
-
- /* the rest is derived from the endpoint descriptor,
- * trusting urb->interval == f(epdesc->bInterval) and
- * including the extra info for hw_bufp[0..2]
- */
- u8 usecs, c_usecs;
- u16 interval;
- u16 tt_usecs;
- u16 maxp;
- u16 raw_mask;
- unsigned bandwidth;
-
- /* This is used to initialize iTD's hw_bufp fields */
- __hc32 buf0;
- __hc32 buf1;
- __hc32 buf2;
-
- /* this is used to initialize sITD's tt info */
- __hc32 address;
-};
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * EHCI Specification 0.95 Section 3.3
- * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
- *
- * Schedule records for high speed iso xfers
- */
-struct fotg210_itd {
- /* first part defined by EHCI spec */
- __hc32 hw_next; /* see EHCI 3.3.1 */
- __hc32 hw_transaction[8]; /* see EHCI 3.3.2 */
-#define FOTG210_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
-#define FOTG210_ISOC_BUF_ERR (1<<30) /* Data buffer error */
-#define FOTG210_ISOC_BABBLE (1<<29) /* babble detected */
-#define FOTG210_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
-#define FOTG210_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
-#define FOTG210_ITD_IOC (1 << 15) /* interrupt on complete */
-
-#define ITD_ACTIVE(fotg210) cpu_to_hc32(fotg210, FOTG210_ISOC_ACTIVE)
-
- __hc32 hw_bufp[7]; /* see EHCI 3.3.3 */
- __hc32 hw_bufp_hi[7]; /* Appendix B */
-
- /* the rest is HCD-private */
- dma_addr_t itd_dma; /* for this itd */
- union fotg210_shadow itd_next; /* ptr to periodic q entry */
-
- struct urb *urb;
- struct fotg210_iso_stream *stream; /* endpoint's queue */
- struct list_head itd_list; /* list of stream's itds */
-
- /* any/all hw_transactions here may be used by that urb */
- unsigned frame; /* where scheduled */
- unsigned pg;
- unsigned index[8]; /* in urb->iso_frame_desc */
-} __aligned(32);
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * EHCI Specification 0.96 Section 3.7
- * Periodic Frame Span Traversal Node (FSTN)
- *
- * Manages split interrupt transactions (using TT) that span frame boundaries
- * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
- * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
- * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
- */
-struct fotg210_fstn {
- __hc32 hw_next; /* any periodic q entry */
- __hc32 hw_prev; /* qh or FOTG210_LIST_END */
-
- /* the rest is HCD-private */
- dma_addr_t fstn_dma;
- union fotg210_shadow fstn_next; /* ptr to periodic q entry */
-} __aligned(32);
-
-/*-------------------------------------------------------------------------*/
-
-/* Prepare the PORTSC wakeup flags during controller suspend/resume */
-
-#define fotg210_prepare_ports_for_controller_suspend(fotg210, do_wakeup) \
- fotg210_adjust_port_wakeup_flags(fotg210, true, do_wakeup)
-
-#define fotg210_prepare_ports_for_controller_resume(fotg210) \
- fotg210_adjust_port_wakeup_flags(fotg210, false, false)
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Some EHCI controllers have a Transaction Translator built into the
- * root hub. This is a non-standard feature. Each controller will need
- * to add code to the following inline functions, and call them as
- * needed (mostly in root hub code).
- */
-
-static inline unsigned int
-fotg210_get_speed(struct fotg210_hcd *fotg210, unsigned int portsc)
-{
- return (readl(&fotg210->regs->otgcsr)
- & OTGCSR_HOST_SPD_TYP) >> 22;
-}
-
-/* Returns the speed of a device attached to a port on the root hub. */
-static inline unsigned int
-fotg210_port_speed(struct fotg210_hcd *fotg210, unsigned int portsc)
-{
- switch (fotg210_get_speed(fotg210, portsc)) {
- case 0:
- return 0;
- case 1:
- return USB_PORT_STAT_LOW_SPEED;
- case 2:
- default:
- return USB_PORT_STAT_HIGH_SPEED;
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define fotg210_has_fsl_portno_bug(e) (0)
-
-/*
- * While most USB host controllers implement their registers in
- * little-endian format, a minority (celleb companion chip) implement
- * them in big endian format.
- *
- * This attempts to support either format at compile time without a
- * runtime penalty, or both formats with the additional overhead
- * of checking a flag bit.
- *
- */
-
-#define fotg210_big_endian_mmio(e) 0
-#define fotg210_big_endian_capbase(e) 0
-
-static inline unsigned int fotg210_readl(const struct fotg210_hcd *fotg210,
- __u32 __iomem *regs)
-{
- return readl(regs);
-}
-
-static inline void fotg210_writel(const struct fotg210_hcd *fotg210,
- const unsigned int val, __u32 __iomem *regs)
-{
- writel(val, regs);
-}
-
-/* cpu to fotg210 */
-static inline __hc32 cpu_to_hc32(const struct fotg210_hcd *fotg210, const u32 x)
-{
- return cpu_to_le32(x);
-}
-
-/* fotg210 to cpu */
-static inline u32 hc32_to_cpu(const struct fotg210_hcd *fotg210, const __hc32 x)
-{
- return le32_to_cpu(x);
-}
-
-static inline u32 hc32_to_cpup(const struct fotg210_hcd *fotg210,
- const __hc32 *x)
-{
- return le32_to_cpup(x);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static inline unsigned fotg210_read_frame_index(struct fotg210_hcd *fotg210)
-{
- return fotg210_readl(fotg210, &fotg210->regs->frame_index);
-}
-
-/*-------------------------------------------------------------------------*/
-
-#endif /* __LINUX_FOTG210_H */
diff --git a/drivers/usb/fotg210/fotg210.h b/drivers/usb/fotg210/fotg210.h
index c44c0afe2956..aab0f0300dc8 100644
--- a/drivers/usb/fotg210/fotg210.h
+++ b/drivers/usb/fotg210/fotg210.h
@@ -2,6 +2,8 @@
#ifndef __FOTG210_H
#define __FOTG210_H
+#include <linux/usb/otg.h>
+
enum gemini_port {
GEMINI_PORT_NONE = 0,
GEMINI_PORT_0,
@@ -15,6 +17,8 @@ struct fotg210 {
struct clk *pclk;
struct regmap *map;
enum gemini_port port;
+ enum usb_dr_mode mode;
+ bool is_fotg210;
};
void fotg210_vbus(struct fotg210 *fotg, bool enable);
@@ -22,22 +26,37 @@ void fotg210_vbus(struct fotg210 *fotg, bool enable);
#ifdef CONFIG_USB_FOTG210_HCD
int fotg210_hcd_probe(struct platform_device *pdev, struct fotg210 *fotg);
int fotg210_hcd_remove(struct platform_device *pdev);
+int fotg210_hcd_suspend(struct device *dev);
+int fotg210_hcd_resume(struct device *dev);
int fotg210_hcd_init(void);
void fotg210_hcd_cleanup(void);
#else
static inline int fotg210_hcd_probe(struct platform_device *pdev,
struct fotg210 *fotg)
{
- return 0;
+ return -ENODEV;
}
+
static inline int fotg210_hcd_remove(struct platform_device *pdev)
{
- return 0;
+ return -ENODEV;
+}
+
+static inline int fotg210_hcd_suspend(struct device *dev)
+{
+ return -ENODEV;
}
+
+static inline int fotg210_hcd_resume(struct device *dev)
+{
+ return -ENODEV;
+}
+
static inline int fotg210_hcd_init(void)
{
return 0;
}
+
static inline void fotg210_hcd_cleanup(void)
{
}
@@ -50,8 +69,9 @@ int fotg210_udc_remove(struct platform_device *pdev);
static inline int fotg210_udc_probe(struct platform_device *pdev,
struct fotg210 *fotg)
{
- return 0;
+ return -ENODEV;
}
+
static inline int fotg210_udc_remove(struct platform_device *pdev)
{
return 0;
--
2.55.0
next prev parent reply other threads:[~2026-09-03 21:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 21:17 [PATCH v3 0/6] Modernize the Faraday FOTG210 driver Linus Walleij
2026-09-03 21:17 ` [PATCH v3 1/6] usb: ehci: support non-standard port status registers Linus Walleij
2026-09-03 21:17 ` [PATCH v3 2/6] usb: ehci: add port reset hooks Linus Walleij
2026-09-03 21:17 ` [PATCH v3 3/6] usb: ehci: add port speed hook Linus Walleij
2026-09-03 21:17 ` [PATCH v3 4/6] usb: ehci: support additional controller quirks Linus Walleij
2026-09-03 21:17 ` Linus Walleij [this message]
2026-09-03 21:17 ` [PATCH v3 6/6] usb: fotg210-udc: fix endpoint and resource handling Linus Walleij
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