* [PATCH v3 03/10] USB: ohci: da8xx: Allow a regulator to handle VBUS
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
We need to remove the platform callbacks to be able to probe
the driver using device tree. Using a regulator to handle VBUS will
eliminate the need for these callbacks once all users are converted
to use a regulator.
The regulator equivalents to the platform callbacks are:
set_power -> regulator_enable/regulator_disable
get_power -> regulator_is_enabled
get_oci -> regulator_get_error_flags
ocic_notify -> regulator event notification
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
drivers/usb/host/ohci-da8xx.c | 97 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 95 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 9ed43c7..0a4b885 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -20,6 +20,7 @@
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_data/usb-davinci.h>
+#include <linux/regulator/consumer.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <asm/unaligned.h>
@@ -36,8 +37,12 @@ static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq,
static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf);
struct da8xx_ohci_hcd {
+ struct usb_hcd *hcd;
struct clk *usb11_clk;
struct phy *usb11_phy;
+ struct regulator *vbus_reg;
+ struct notifier_block nb;
+ unsigned int is_powered;
};
#define to_da8xx_ohci(hcd) (struct da8xx_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
@@ -82,56 +87,105 @@ static void ohci_da8xx_disable(struct usb_hcd *hcd)
static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
+ int ret;
if (hub && hub->set_power)
return hub->set_power(1, on);
+ if (!da8xx_ohci->vbus_reg)
+ return 0;
+
+ if (on && !da8xx_ohci->is_powered) {
+ ret = regulator_enable(da8xx_ohci->vbus_reg);
+ if (ret) {
+ dev_err(dev, "Fail to enable regulator: %d\n", ret);
+ return ret;
+ }
+ da8xx_ohci->is_powered = 1;
+
+ } else if (!on && da8xx_ohci->is_powered) {
+ ret = regulator_disable(da8xx_ohci->vbus_reg);
+ if (ret) {
+ dev_err(dev, "Fail to disable regulator: %d\n", ret);
+ return ret;
+ }
+ da8xx_ohci->is_powered = 0;
+ }
+
return 0;
}
static int ohci_da8xx_get_power(struct usb_hcd *hcd)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
if (hub && hub->get_power)
return hub->get_power(1);
+ if (da8xx_ohci->vbus_reg)
+ return regulator_is_enabled(da8xx_ohci->vbus_reg);
+
return 1;
}
static int ohci_da8xx_get_oci(struct usb_hcd *hcd)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
+ unsigned int flags;
+ int ret;
if (hub && hub->get_oci)
return hub->get_oci(1);
+ if (!da8xx_ohci->vbus_reg)
+ return 0;
+
+ ret = regulator_get_error_flags(da8xx_ohci->vbus_reg, &flags);
+ if (ret) {
+ dev_err(dev, "could not get regulator error flags: %d\n", ret);
+ return ret;
+ }
+
+ if (flags && REGULATOR_ERROR_OVER_CURRENT)
+ return 1;
+
return 0;
}
static int ohci_da8xx_has_set_power(struct usb_hcd *hcd)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
if (hub && hub->set_power)
return 1;
+ if (da8xx_ohci->vbus_reg)
+ return 1;
+
return 0;
}
static int ohci_da8xx_has_oci(struct usb_hcd *hcd)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
if (hub && hub->get_oci)
return 1;
+ if (da8xx_ohci->vbus_reg)
+ return 1;
+
return 0;
}
@@ -159,15 +213,41 @@ static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub,
hub->set_power(port, 0);
}
+static int ohci_da8xx_regulator_event(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct da8xx_ohci_hcd *da8xx_ohci =
+ container_of(nb, struct da8xx_ohci_hcd, nb);
+ struct device *dev = da8xx_ohci->hcd->self.controller;
+
+ if (event & REGULATOR_EVENT_OVER_CURRENT) {
+ dev_warn(dev, "over current event\n");
+ ocic_mask |= 1;
+ ohci_da8xx_set_power(da8xx_ohci->hcd, 0);
+ }
+
+ return 0;
+}
+
static int ohci_da8xx_register_notify(struct usb_hcd *hcd)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
+ int ret = 0;
if (hub && hub->ocic_notify)
- return hub->ocic_notify(ohci_da8xx_ocic_handler);
+ ret = hub->ocic_notify(ohci_da8xx_ocic_handler);
+ else if (da8xx_ohci->vbus_reg) {
+ da8xx_ohci->nb.notifier_call = ohci_da8xx_regulator_event;
+ ret = devm_regulator_register_notifier(da8xx_ohci->vbus_reg,
+ &da8xx_ohci->nb);
+ }
- return 0;
+ if (ret)
+ dev_err(dev, "Failed to register notifier: %d\n", ret);
+
+ return ret;
}
static void ohci_da8xx_unregister_notify(struct usb_hcd *hcd)
@@ -330,6 +410,7 @@ static int ohci_da8xx_probe(struct platform_device *pdev)
return -ENOMEM;
da8xx_ohci = to_da8xx_ohci(hcd);
+ da8xx_ohci->hcd = hcd;
da8xx_ohci->usb11_clk = devm_clk_get(&pdev->dev, "usb11");
if (IS_ERR(da8xx_ohci->usb11_clk)) {
@@ -347,6 +428,18 @@ static int ohci_da8xx_probe(struct platform_device *pdev)
goto err;
}
+ da8xx_ohci->vbus_reg = devm_regulator_get_optional(&pdev->dev, "vbus");
+ if (IS_ERR(da8xx_ohci->vbus_reg)) {
+ error = PTR_ERR(da8xx_ohci->vbus_reg);
+ if (error == -ENODEV)
+ da8xx_ohci->vbus_reg = NULL;
+ else {
+ dev_err(&pdev->dev,
+ "Failed to get regulator: %d\n", error);
+ goto err;
+ }
+ }
+
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(hcd->regs)) {
--
2.10.1
^ permalink raw reply related
* [PATCH v3 04/10] ARM: davinci: da830: Handle vbus with a regulator
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
The usb driver can now take a regulator instead of the platform
callbacks for vbus handling. Lets use a regulator so we can remove
the callbacks in a later patch.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
arch/arm/mach-davinci/board-da830-evm.c | 108 +++++++++++---------------------
1 file changed, 38 insertions(+), 70 deletions(-)
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 5db0901..16a401a 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -14,6 +14,7 @@
#include <linux/console.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
+#include <linux/gpio/machine.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/i2c/pcf857x.h>
@@ -28,6 +29,7 @@
#include <linux/platform_data/spi-davinci.h>
#include <linux/platform_data/usb-davinci.h>
#include <linux/regulator/machine.h>
+#include <linux/regulator/fixed.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -38,72 +40,48 @@
#include <mach/da8xx.h>
#define DA830_EVM_PHY_ID ""
-/*
- * USB1 VBUS is controlled by GPIO1[15], over-current is reported on GPIO2[4].
- */
-#define ON_BD_USB_DRV GPIO_TO_PIN(1, 15)
-#define ON_BD_USB_OVC GPIO_TO_PIN(2, 4)
static const short da830_evm_usb11_pins[] = {
DA830_GPIO1_15, DA830_GPIO2_4,
-1
};
-static da8xx_ocic_handler_t da830_evm_usb_ocic_handler;
-
-static int da830_evm_usb_set_power(unsigned port, int on)
-{
- gpio_set_value(ON_BD_USB_DRV, on);
- return 0;
-}
+static struct regulator_consumer_supply usb_ohci_consumer_supply =
+ REGULATOR_SUPPLY("vbus", "ohci-da8xx");
-static int da830_evm_usb_get_power(unsigned port)
-{
- return gpio_get_value(ON_BD_USB_DRV);
-}
-
-static int da830_evm_usb_get_oci(unsigned port)
-{
- return !gpio_get_value(ON_BD_USB_OVC);
-}
-
-static irqreturn_t da830_evm_usb_ocic_irq(int, void *);
-
-static int da830_evm_usb_ocic_notify(da8xx_ocic_handler_t handler)
-{
- int irq = gpio_to_irq(ON_BD_USB_OVC);
- int error = 0;
-
- if (handler != NULL) {
- da830_evm_usb_ocic_handler = handler;
-
- error = request_irq(irq, da830_evm_usb_ocic_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "OHCI over-current indicator", NULL);
- if (error)
- pr_err("%s: could not request IRQ to watch over-current indicator changes\n",
- __func__);
- } else
- free_irq(irq, NULL);
-
- return error;
-}
+static struct regulator_init_data usb_ohci_initdata = {
+ .consumer_supplies = &usb_ohci_consumer_supply,
+ .num_consumer_supplies = 1,
+ .constraints = {
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ },
+};
-static struct da8xx_ohci_root_hub da830_evm_usb11_pdata = {
- .set_power = da830_evm_usb_set_power,
- .get_power = da830_evm_usb_get_power,
- .get_oci = da830_evm_usb_get_oci,
- .ocic_notify = da830_evm_usb_ocic_notify,
+static struct fixed_voltage_config usb_ohci_config = {
+ .supply_name = "vbus",
+ .microvolts = 5000000,
+ .gpio = GPIO_TO_PIN(1, 15),
+ .enable_high = 1,
+ .enabled_at_boot = 0,
+ .init_data = &usb_ohci_initdata,
+};
- /* TPS2065 switch @ 5V */
- .potpgt = (3 + 1) / 2, /* 3 ms max */
+static struct platform_device da8xx_usb11_regulator = {
+ .name = "reg-fixed-voltage",
+ .id = 0,
+ .dev = {
+ .platform_data = &usb_ohci_config,
+ },
};
-static irqreturn_t da830_evm_usb_ocic_irq(int irq, void *dev_id)
-{
- da830_evm_usb_ocic_handler(&da830_evm_usb11_pdata, 1);
- return IRQ_HANDLED;
-}
+static struct gpiod_lookup_table usb11_gpios_table = {
+ .dev_id = "reg-fixed-voltage.0",
+ .table = {
+ /* gpio chip 1 contains gpio range 32-63 */
+ GPIO_LOOKUP("davinci_gpio.1", 4, "over-current",
+ GPIO_ACTIVE_LOW),
+ },
+};
static __init void da830_evm_usb_init(void)
{
@@ -145,23 +123,13 @@ static __init void da830_evm_usb_init(void)
return;
}
- ret = gpio_request(ON_BD_USB_DRV, "ON_BD_USB_DRV");
- if (ret) {
- pr_err("%s: failed to request GPIO for USB 1.1 port power control: %d\n",
- __func__, ret);
- return;
- }
- gpio_direction_output(ON_BD_USB_DRV, 0);
+ gpiod_add_lookup_table(&usb11_gpios_table);
- ret = gpio_request(ON_BD_USB_OVC, "ON_BD_USB_OVC");
- if (ret) {
- pr_err("%s: failed to request GPIO for USB 1.1 port over-current indicator: %d\n",
- __func__, ret);
- return;
- }
- gpio_direction_input(ON_BD_USB_OVC);
+ ret = platform_device_register(&da8xx_usb11_regulator);
+ if (ret)
+ pr_warn("fail to add ohci regulator\n");
- ret = da8xx_register_usb11(&da830_evm_usb11_pdata);
+ ret = da8xx_register_usb11(NULL);
if (ret)
pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
}
--
2.10.1
^ permalink raw reply related
* [PATCH v3 05/10] ARM: davinci: hawk: Remove vbus and over current gpios
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
The hawk board VBUS is fixed to a 5v source, and the over
current pin is actually not connected to the SoC.
Do not reseve these gpios for OHCI as they are not related
to usb.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
arch/arm/mach-davinci/board-omapl138-hawk.c | 99 ++---------------------------
1 file changed, 4 insertions(+), 95 deletions(-)
diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index a4e8726..a252404 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -28,9 +28,6 @@
#define DA850_HAWK_MMCSD_CD_PIN GPIO_TO_PIN(3, 12)
#define DA850_HAWK_MMCSD_WP_PIN GPIO_TO_PIN(3, 13)
-#define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
-#define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
-
static short omapl138_hawk_mii_pins[] __initdata = {
DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
@@ -181,76 +178,10 @@ static __init void omapl138_hawk_mmc_init(void)
gpio_free(DA850_HAWK_MMCSD_CD_PIN);
}
-static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
-static da8xx_ocic_handler_t hawk_usb_ocic_handler;
-
-static const short da850_hawk_usb11_pins[] = {
- DA850_GPIO2_4, DA850_GPIO6_13,
- -1
-};
-
-static int hawk_usb_set_power(unsigned port, int on)
-{
- gpio_set_value(DA850_USB1_VBUS_PIN, on);
- return 0;
-}
-
-static int hawk_usb_get_power(unsigned port)
-{
- return gpio_get_value(DA850_USB1_VBUS_PIN);
-}
-
-static int hawk_usb_get_oci(unsigned port)
-{
- return !gpio_get_value(DA850_USB1_OC_PIN);
-}
-
-static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
-{
- int irq = gpio_to_irq(DA850_USB1_OC_PIN);
- int error = 0;
-
- if (handler != NULL) {
- hawk_usb_ocic_handler = handler;
-
- error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
- IRQF_TRIGGER_RISING |
- IRQF_TRIGGER_FALLING,
- "OHCI over-current indicator", NULL);
- if (error)
- pr_err("%s: could not request IRQ to watch "
- "over-current indicator changes\n", __func__);
- } else {
- free_irq(irq, NULL);
- }
- return error;
-}
-
-static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
- .set_power = hawk_usb_set_power,
- .get_power = hawk_usb_get_power,
- .get_oci = hawk_usb_get_oci,
- .ocic_notify = hawk_usb_ocic_notify,
- /* TPS2087 switch @ 5V */
- .potpgt = (3 + 1) / 2, /* 3 ms max */
-};
-
-static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
-{
- hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
- return IRQ_HANDLED;
-}
-
static __init void omapl138_hawk_usb_init(void)
{
int ret;
- ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
- if (ret) {
- pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
- return;
- }
-
ret = da8xx_register_usb20_phy_clk(false);
if (ret)
pr_warn("%s: USB 2.0 PHY CLK registration failed: %d\n",
@@ -266,34 +197,12 @@ static __init void omapl138_hawk_usb_init(void)
pr_warn("%s: USB PHY registration failed: %d\n",
__func__, ret);
- ret = gpio_request_one(DA850_USB1_VBUS_PIN,
- GPIOF_DIR_OUT, "USB1 VBUS");
- if (ret < 0) {
- pr_err("%s: failed to request GPIO for USB 1.1 port "
- "power control: %d\n", __func__, ret);
- return;
- }
-
- ret = gpio_request_one(DA850_USB1_OC_PIN,
- GPIOF_DIR_IN, "USB1 OC");
- if (ret < 0) {
- pr_err("%s: failed to request GPIO for USB 1.1 port "
- "over-current indicator: %d\n", __func__, ret);
- goto usb11_setup_oc_fail;
- }
-
- ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
- if (ret) {
- pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
- goto usb11_setup_fail;
- }
+ ret = da8xx_register_usb11(NULL);
+ if (ret)
+ pr_warn("%s: USB 1.1 registration failed: %d\n",
+ __func__, ret);
return;
-
-usb11_setup_fail:
- gpio_free(DA850_USB1_OC_PIN);
-usb11_setup_oc_fail:
- gpio_free(DA850_USB1_VBUS_PIN);
}
static __init void omapl138_hawk_init(void)
--
2.10.1
^ permalink raw reply related
* [PATCH v3 06/10] USB: ohci: da8xx: Remove ohci platform callbacks
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
Now that all ohci users are are using a regulator, we can
remove the platform callbacks and data.
potpgt is no longer necessary as a power on delay time can
be specified for the regulator itself.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
arch/arm/mach-davinci/board-da830-evm.c | 2 +-
arch/arm/mach-davinci/board-omapl138-hawk.c | 2 +-
arch/arm/mach-davinci/include/mach/da8xx.h | 2 +-
arch/arm/mach-davinci/usb-da8xx.c | 3 +-
drivers/usb/host/ohci-da8xx.c | 84 ++---------------------------
include/linux/platform_data/usb-davinci.h | 20 -------
6 files changed, 9 insertions(+), 104 deletions(-)
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index 16a401a..cb67885 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -129,7 +129,7 @@ static __init void da830_evm_usb_init(void)
if (ret)
pr_warn("fail to add ohci regulator\n");
- ret = da8xx_register_usb11(NULL);
+ ret = da8xx_register_usb11();
if (ret)
pr_warn("%s: USB 1.1 registration failed: %d\n", __func__, ret);
}
diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index a252404..cbe7324 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -197,7 +197,7 @@ static __init void omapl138_hawk_usb_init(void)
pr_warn("%s: USB PHY registration failed: %d\n",
__func__, ret);
- ret = da8xx_register_usb11(NULL);
+ ret = da8xx_register_usb11();
if (ret)
pr_warn("%s: USB 1.1 registration failed: %d\n",
__func__, ret);
diff --git a/arch/arm/mach-davinci/include/mach/da8xx.h b/arch/arm/mach-davinci/include/mach/da8xx.h
index 43322be..6096402 100644
--- a/arch/arm/mach-davinci/include/mach/da8xx.h
+++ b/arch/arm/mach-davinci/include/mach/da8xx.h
@@ -91,7 +91,7 @@ int da8xx_register_spi_bus(int instance, unsigned num_chipselect);
int da8xx_register_watchdog(void);
int da8xx_register_usb_phy(void);
int da8xx_register_usb20(unsigned mA, unsigned potpgt);
-int da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata);
+int da8xx_register_usb11(void);
int da8xx_register_usb_refclkin(int rate);
int da8xx_register_usb20_phy_clk(bool use_usb_refclkin);
int da8xx_register_usb11_phy_clk(bool use_usb_refclkin);
diff --git a/arch/arm/mach-davinci/usb-da8xx.c b/arch/arm/mach-davinci/usb-da8xx.c
index c6feecf..4ea91bb 100644
--- a/arch/arm/mach-davinci/usb-da8xx.c
+++ b/arch/arm/mach-davinci/usb-da8xx.c
@@ -119,9 +119,8 @@ static struct platform_device da8xx_usb11_device = {
.resource = da8xx_usb11_resources,
};
-int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
+int __init da8xx_register_usb11(void)
{
- da8xx_usb11_device.dev.platform_data = pdata;
return platform_device_register(&da8xx_usb11_device);
}
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 0a4b885..3dcbf1f 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -89,12 +89,8 @@ static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
int ret;
- if (hub && hub->set_power)
- return hub->set_power(1, on);
-
if (!da8xx_ohci->vbus_reg)
return 0;
@@ -121,11 +117,6 @@ static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on)
static int ohci_da8xx_get_power(struct usb_hcd *hcd)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
- struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
-
- if (hub && hub->get_power)
- return hub->get_power(1);
if (da8xx_ohci->vbus_reg)
return regulator_is_enabled(da8xx_ohci->vbus_reg);
@@ -137,13 +128,9 @@ static int ohci_da8xx_get_oci(struct usb_hcd *hcd)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
unsigned int flags;
int ret;
- if (hub && hub->get_oci)
- return hub->get_oci(1);
-
if (!da8xx_ohci->vbus_reg)
return 0;
@@ -159,29 +146,9 @@ static int ohci_da8xx_get_oci(struct usb_hcd *hcd)
return 0;
}
-static int ohci_da8xx_has_set_power(struct usb_hcd *hcd)
+static int ohci_da8xx_has_regulator(struct usb_hcd *hcd)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
- struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
-
- if (hub && hub->set_power)
- return 1;
-
- if (da8xx_ohci->vbus_reg)
- return 1;
-
- return 0;
-}
-
-static int ohci_da8xx_has_oci(struct usb_hcd *hcd)
-{
- struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
- struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
-
- if (hub && hub->get_oci)
- return 1;
if (da8xx_ohci->vbus_reg)
return 1;
@@ -189,30 +156,9 @@ static int ohci_da8xx_has_oci(struct usb_hcd *hcd)
return 0;
}
-static int ohci_da8xx_has_potpgt(struct usb_hcd *hcd)
-{
- struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
-
- if (hub && hub->potpgt)
- return 1;
-
- return 0;
-}
-
/*
* Handle the port over-current indicator change.
*/
-static void ohci_da8xx_ocic_handler(struct da8xx_ohci_root_hub *hub,
- unsigned port)
-{
- ocic_mask |= 1 << port;
-
- /* Once over-current is detected, the port needs to be powered down */
- if (hub->get_oci(port) > 0)
- hub->set_power(port, 0);
-}
-
static int ohci_da8xx_regulator_event(struct notifier_block *nb,
unsigned long event, void *data)
{
@@ -233,12 +179,9 @@ static int ohci_da8xx_register_notify(struct usb_hcd *hcd)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
int ret = 0;
- if (hub && hub->ocic_notify)
- ret = hub->ocic_notify(ohci_da8xx_ocic_handler);
- else if (da8xx_ohci->vbus_reg) {
+ if (da8xx_ohci->vbus_reg) {
da8xx_ohci->nb.notifier_call = ohci_da8xx_regulator_event;
ret = devm_regulator_register_notifier(da8xx_ohci->vbus_reg,
&da8xx_ohci->nb);
@@ -250,19 +193,9 @@ static int ohci_da8xx_register_notify(struct usb_hcd *hcd)
return ret;
}
-static void ohci_da8xx_unregister_notify(struct usb_hcd *hcd)
-{
- struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
-
- if (hub && hub->ocic_notify)
- hub->ocic_notify(NULL);
-}
-
static int ohci_da8xx_reset(struct usb_hcd *hcd)
{
struct device *dev = hcd->self.controller;
- struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int result;
u32 rh_a;
@@ -291,20 +224,14 @@ static int ohci_da8xx_reset(struct usb_hcd *hcd)
* register's default value, so that ohci_hub_control() could return
* the correct hub descriptor...
*/
- rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
- if (ohci_da8xx_has_set_power(hcd)) {
+ if (ohci_da8xx_has_regulator(hcd)) {
+ rh_a = ohci_readl(ohci, &ohci->regs->roothub.a);
rh_a &= ~RH_A_NPS;
rh_a |= RH_A_PSM;
- }
- if (ohci_da8xx_has_oci(hcd)) {
rh_a &= ~RH_A_NOCP;
rh_a |= RH_A_OCPM;
+ ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
}
- if (ohci_da8xx_has_potpgt(hcd)) {
- rh_a &= ~RH_A_POTPGT;
- rh_a |= hub->potpgt << 24;
- }
- ohci_writel(ohci, rh_a, &ohci->regs->roothub.a);
return result;
}
@@ -479,7 +406,6 @@ static int ohci_da8xx_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
- ohci_da8xx_unregister_notify(hcd);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
diff --git a/include/linux/platform_data/usb-davinci.h b/include/linux/platform_data/usb-davinci.h
index 0926e99..58f4be0 100644
--- a/include/linux/platform_data/usb-davinci.h
+++ b/include/linux/platform_data/usb-davinci.h
@@ -11,26 +11,6 @@
#ifndef __ASM_ARCH_USB_H
#define __ASM_ARCH_USB_H
-struct da8xx_ohci_root_hub;
-
-typedef void (*da8xx_ocic_handler_t)(struct da8xx_ohci_root_hub *hub,
- unsigned port);
-
-/* Passed as the platform data to the OHCI driver */
-struct da8xx_ohci_root_hub {
- /* Switch the port power on/off */
- int (*set_power)(unsigned port, int on);
- /* Read the port power status */
- int (*get_power)(unsigned port);
- /* Read the port over-current indicator */
- int (*get_oci)(unsigned port);
- /* Over-current indicator change notification (pass NULL to disable) */
- int (*ocic_notify)(da8xx_ocic_handler_t handler);
-
- /* Time from power on to power good (in 2 ms units) */
- u8 potpgt;
-};
-
void davinci_setup_usb(unsigned mA, unsigned potpgt_ms);
#endif /* ifndef __ASM_ARCH_USB_H */
--
2.10.1
^ permalink raw reply related
* [PATCH v3 07/10] USB: ohci: da8xx: use a flag instead of mask for ocic
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
Now that the platform callback is removed, we can move the over
current indictor changed flag to the private data structure.
Since the driver only handles a single port, there is no need
for ocic to be a mask, we can use a simple flag instead.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
drivers/usb/host/ohci-da8xx.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 3dcbf1f..83b182e 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -43,12 +43,10 @@ struct da8xx_ohci_hcd {
struct regulator *vbus_reg;
struct notifier_block nb;
unsigned int is_powered;
+ unsigned int oc_changed;
};
#define to_da8xx_ohci(hcd) (struct da8xx_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
-/* Over-current indicator change bitmask */
-static volatile u16 ocic_mask;
-
static int ohci_da8xx_enable(struct usb_hcd *hcd)
{
struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
@@ -168,7 +166,7 @@ static int ohci_da8xx_regulator_event(struct notifier_block *nb,
if (event & REGULATOR_EVENT_OVER_CURRENT) {
dev_warn(dev, "over current event\n");
- ocic_mask |= 1;
+ da8xx_ohci->oc_changed = 1;
ohci_da8xx_set_power(da8xx_ohci->hcd, 0);
}
@@ -241,10 +239,11 @@ static int ohci_da8xx_reset(struct usb_hcd *hcd)
*/
static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
int length = orig_ohci_hub_status_data(hcd, buf);
/* See if we have OCIC bit set on port 1 */
- if (ocic_mask & (1 << 1)) {
+ if (da8xx_ohci->oc_changed) {
dev_dbg(hcd->self.controller, "over-current indicator change "
"on port 1\n");
@@ -262,6 +261,7 @@ static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf)
static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
+ struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd);
struct device *dev = hcd->self.controller;
int temp;
@@ -284,7 +284,7 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
temp |= RH_PS_POCI;
/* The over-current indicator change (OCIC) bit is 0 too */
- if (ocic_mask & (1 << wIndex))
+ if (da8xx_ohci->oc_changed)
temp |= RH_PS_OCIC;
put_unaligned(cpu_to_le32(temp), (__le32 *)buf);
@@ -311,10 +311,7 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
temp ? "Set" : "Clear", wIndex,
"C_OVER_CURRENT");
- if (temp)
- ocic_mask |= 1 << wIndex;
- else
- ocic_mask &= ~(1 << wIndex);
+ da8xx_ohci->oc_changed = temp;
return 0;
}
}
--
2.10.1
^ permalink raw reply related
* [PATCH v3 08/10] USB: ohci: da8xx: Add devicetree bindings
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
This patch documents the device tree bindings required for
the ohci controller found in TI da8xx family of SoC's
Cc: devicetree at vger.kernel.org
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
.../devicetree/bindings/usb/ohci-da8xx.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/ohci-da8xx.txt
diff --git a/Documentation/devicetree/bindings/usb/ohci-da8xx.txt b/Documentation/devicetree/bindings/usb/ohci-da8xx.txt
new file mode 100644
index 0000000..f18e82c
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/ohci-da8xx.txt
@@ -0,0 +1,39 @@
+DA8XX USB OHCI controller
+
+Required properties:
+
+ - compatible: Should be "ti,da830-ohci"
+ - reg: Should contain one register range i.e. start and length
+ - interrupts: Description of the interrupt line
+ - phys: Phandle for the PHY device
+ - phy-names: Should be "usb-phy"
+
+Optional properties:
+ - vbus-supply: Regulator that controls vbus power
+
+Example:
+
+reg_usb_ohci: regulator at 0 {
+ compatible = "regulator-fixed";
+ gpio = <&gpio 109 0>;
+ over-current-gpios = <&gpio 36 0>;
+ regulator-boot-on;
+ enable-active-high;
+ regulator-name = "usb_ohci_vbus";
+ regulator-min-microvolt = <5000000>;
+ regulator-max-microvolt = <5000000>;
+};
+
+usb_phy: usb-phy {
+ compatible = "ti,da830-usb-phy";
+ #phy-cells = <1>;
+};
+
+ohci: usb at 0225000 {
+ compatible = "ti,da830-ohci";
+ reg = <0x225000 0x1000>;
+ interrupts = <59>;
+ phys = <&usb_phy 1>;
+ phy-names = "usb-phy";
+ vbus-supply = <®_usb_ohci>;
+};
--
2.10.1
^ permalink raw reply related
* [PATCH v3 09/10] USB: ohci: da8xx: Allow probing from DT
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
This adds the compatible string to the ohci driver
to be able to probe from DT
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
drivers/usb/host/ohci-da8xx.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 83b182e..bbfe342 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -321,6 +321,13 @@ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
}
/*-------------------------------------------------------------------------*/
+#ifdef CONFIG_OF
+static const struct of_device_id da8xx_ohci_ids[] = {
+ { .compatible = "ti,da830-ohci" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, da8xx_ohci_ids);
+#endif
static int ohci_da8xx_probe(struct platform_device *pdev)
{
@@ -472,6 +479,7 @@ static struct platform_driver ohci_hcd_da8xx_driver = {
#endif
.driver = {
.name = DRV_NAME,
+ .of_match_table = of_match_ptr(da8xx_ohci_ids),
},
};
--
2.10.1
^ permalink raw reply related
* [PATCH v3 10/10] ARM: dts: da850: add usb device node
From: Axel Haslam @ 2016-11-07 20:39 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107203948.28324-1-ahaslam@baylibre.com>
This adds the ohci device node for the da850 soc.
It also enables it for the omapl138 hawk board.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
---
arch/arm/boot/dts/da850-lcdk.dts | 8 ++++++++
arch/arm/boot/dts/da850.dtsi | 8 ++++++++
2 files changed, 16 insertions(+)
diff --git a/arch/arm/boot/dts/da850-lcdk.dts b/arch/arm/boot/dts/da850-lcdk.dts
index 7b8ab21..aaf533e 100644
--- a/arch/arm/boot/dts/da850-lcdk.dts
+++ b/arch/arm/boot/dts/da850-lcdk.dts
@@ -86,6 +86,14 @@
};
};
+&usb_phy {
+ status = "okay";
+};
+
+&ohci {
+ status = "okay";
+};
+
&serial2 {
pinctrl-names = "default";
pinctrl-0 = <&serial2_rxtx_pins>;
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 2534aab..50e86da 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -405,6 +405,14 @@
>;
status = "disabled";
};
+ ohci: usb at 0225000 {
+ compatible = "ti,da830-ohci";
+ reg = <0x225000 0x1000>;
+ interrupts = <59>;
+ phys = <&usb_phy 1>;
+ phy-names = "usb-phy";
+ status = "disabled";
+ };
gpio: gpio at 226000 {
compatible = "ti,dm6441-gpio";
gpio-controller;
--
2.10.1
^ permalink raw reply related
* [PATCH v2] iommu/arm-smmu: Fix out-of-bounds dereference
From: Will Deacon @ 2016-11-07 20:43 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <3e31e04e167e2b12fc814c22a0b6902bd4f926f2.1478543109.git.robin.murphy@arm.com>
On Mon, Nov 07, 2016 at 06:25:09PM +0000, Robin Murphy wrote:
> When we iterate a master's config entries, what we generally care
> about is the entry's stream map index, rather than the entry index
> itself, so it's nice to have the iterator automatically assign the
> former from the latter. Unfortunately, booting with KASAN reveals
> the oversight that using a simple comma operator results in the
> entry index being dereferenced before being checked for validity,
> so we always access one element past the end of the fwspec array.
>
> Flip things around so that the check always happens before the index
> may be dereferenced.
>
> Fixes: adfec2e709d2 ("iommu/arm-smmu: Convert to iommu_fwspec")
> Reported-by: Mark Rutland <mark.rutland@arm.com>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index f86683eec446..786d33900382 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -324,8 +324,10 @@ struct arm_smmu_master_cfg {
> #define INVALID_SMENDX -1
> #define __fwspec_cfg(fw) ((struct arm_smmu_master_cfg *)fw->iommu_priv)
> #define fwspec_smmu(fw) (__fwspec_cfg(fw)->smmu)
> +#define fwspec_smendx(fw, i) \
> + (i >= fw->num_ids ? INVALID_SMENDX : __fwspec_cfg(fw)->smendx[i])
> #define for_each_cfg_sme(fw, i, idx) \
> - for (i = 0; idx = __fwspec_cfg(fw)->smendx[i], i < fw->num_ids; ++i)
> + for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i)
That's certainly more readable:
Acked-by: Will Deacon <will.deacon@arm.com>
Joerg, if you haven't sent your fixes pull yet, please could you add this on
top? Otherwise, I'll queue it for 4.10, given that I think this only causes
a KASAN splat (the out-of-bounds read isn't ever used for anything).
Will
^ permalink raw reply
* [PATCH] arm64: mm: Fix memmap to be initialized for the entire section
From: Will Deacon @ 2016-11-07 21:05 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161028091905.GM22012@rric.localdomain>
On Fri, Oct 28, 2016 at 11:19:05AM +0200, Robert Richter wrote:
> On 27.10.16 17:01:36, Will Deacon wrote:
> > It feels to me like NOMAP memory is a new type
> > of memory where there *is* a struct page, but it shouldn't be used for
> > anything.
>
> IMO, a NOMAP page should just be handled like a reserved page except
> that the page is marked reserved. See free_low_memory_core_early().
> Thus, NOMAP pages are not in the free pages list or set to reserved.
> It is simply not available for mapping at all. Isn't that exactly what
> it should be?
>
> I also did not yet understand the benefit of the differentiation
> between NOMAP and reserved and the original motivation for its
> implementation. I looked through the mail threads but could not find
> any hint. The only difference I see now is that it is not listed as a
> reserved page, but as long as it is not freed it should behave the
> same. I remember the case to handle memory different (coherency,
> etc.), but are not sure here. Ard, could you explain this?
>
> > I don't think pfn_valid can describe that, given the way it's
> > currently used, and flipping the logic is just likely to move the problem
> > elsewhere.
> >
> > What options do we have for fixing this in the NUMA code?
>
> Out of my mind:
>
> 1) Treat NOMAP pages same as reserved pages (my patch).
Just to reiterate here, but your patch as it stands will break other parts
of the kernel. For example, acpi_os_ioremap relies on being able to ioremap
these regions afaict.
I think any solution involving pfn_valid is just going to move the crash
around.
Will
^ permalink raw reply
* [PATCH RFC 4/7] ASoC: samsung: i2s: Do not use platform_data for DMA parameters
From: Arnd Bergmann @ 2016-11-07 21:14 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <c4388f30-702b-895b-5280-6fabf8e7bfe1@samsung.com>
On Monday, November 7, 2016 5:02:54 PM CET Sylwester Nawrocki wrote:
> On 11/05/2016 12:29 AM, Arnd Bergmann wrote:
> > On Friday 04 November 2016, Sylwester Nawrocki wrote:
> >> > - ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
> >> > + ret = samsung_asoc_dma_platform_register(&pdev->dev, NULL,
> >> > NULL, NULL);
> >
> > If we remove the filter argument from every caller here, maybe we should also
> > change the prototype to not expect those three NULL arguments any more.
>
> There is one occurrence where the third argument needs to be not NULL.
> I'm planning to modify sound/sound/samsung/i2s.c so there is no need
> to create another platform device just for the overlay DAI, afterwards
> the above function could be simplified.
Ok, sounds good.
Arnd
^ permalink raw reply
* [PATCH] ARM: spear: Fix error handling
From: Olof Johansson @ 2016-11-07 21:16 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161029135839.6388-1-christophe.jaillet@wanadoo.fr>
On Sat, Oct 29, 2016 at 03:58:39PM +0200, Christophe JAILLET wrote:
> 'clk_get_sys()' returns an error pointer in case of error, not NULL. So
> test it with IS_ERR.
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Applied to fixes-non-critical, thanks.
-Olof
^ permalink raw reply
* [PATCH] ARM: zx: Fix error handling
From: Olof Johansson @ 2016-11-07 21:18 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161030081010.14735-1-christophe.jaillet@wanadoo.fr>
On Sun, Oct 30, 2016 at 09:10:10AM +0100, Christophe JAILLET wrote:
> 'devm_ioremap_resource()' returns an error pointer in case of error, not
> NULL. So test it with IS_ERR.
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> 'return -EIO;' could also be turned into 'return PTR_ERR(pcubase);' in
> order to propagate the error value.
Applied to fixes-non-critical. Thanks!
-Olof
^ permalink raw reply
* [v15, 3/7] powerpc/fsl: move mpc85xx.h to include/linux/fsl
From: Arnd Bergmann @ 2016-11-07 21:20 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <DB6PR0401MB2536B1B2E6AC36BDC8FC540DF8AE0@DB6PR0401MB2536.eurprd04.prod.outlook.com>
On Monday, October 31, 2016 9:35:33 AM CET Y.B. Lu wrote:
> >
> > I don't see any of the contents of this header referenced by the soc
> > driver any more. I think you can just drop this patch.
> >
>
> [Lu Yangbo-B47093] This header file was included by guts.c.
> The guts driver used macro SVR_MAJ/SVR_MIN for calculation.
>
> This header file was for powerpc arch before. And this patch is to made it as
> common header file for both ARM and PPC.
> Sooner or later this is needed.
Let's discuss it once we actually need the header then, ok?
Arnd
^ permalink raw reply
* [GIT PULL] ARM: OXNAS SoC updates for 4.10
From: Olof Johansson @ 2016-11-07 21:26 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1305c61f-b1ef-7caf-7788-67e2b907e873@baylibre.com>
On Mon, Oct 31, 2016 at 10:52:53AM +0100, Neil Armstrong wrote:
> Dear arm-soc maintainers,
>
> The following changes since commit 1001354ca34179f3db924eb66672442a173147dc:
>
> Linux 4.9-rc1 (2016-10-15 12:17:50 -0700)
>
> are available in the git repository at:
>
> https://github.com/OXNAS/linux.git tags/oxnas-arm-soc-for-4.10
>
> for you to fetch changes up to b3cdb3c5ef514687891f03442f2677850340bcfa:
>
> ARM: oxnas: Add OX820 config and makefile entry (2016-10-31 10:41:33 +0100)
>
> ----------------------------------------------------------------
> - Add SMP support for the Oxford Semiconductor OX820 SoC
> from http://lkml.kernel.org/r/20161021085848.1754-1-narmstrong at baylibre.com
>
> ----------------------------------------------------------------
> Neil Armstrong (2):
> ARM: oxnas: Add OX820 SMP support
> ARM: oxnas: Add OX820 config and makefile entry
Hi Neil,
Sorry for being picky here, please be patient with us. :-)
Overall comments on this patch set:
1) Copyrights seem to be a bit varied. All 3 new source files have
different copyright holders. Only one has yours, one is from 2003, one
is also from 2013. Is this expected? Seems like it's worth mentioning
in commit messages at least.
2) Please remove the linux/arch/... lines from the top of the files. It's
something we've been trying to remove for a while and don't want to
introduce more occurrances of.
I'd say (2) is fine to do incremental, but please provide clarification on (1).
I could just add that to the merge commit message so don't respin the branch
yet, depending on what we hear back!
> arch/arm/Makefile | 1 +
> arch/arm/mach-oxnas/Kconfig | 30 +++++++++++++++++++---------
> arch/arm/mach-oxnas/Makefile | 2 ++
> arch/arm/mach-oxnas/headsmp.S | 28 ++++++++++++++++++++++++++
> arch/arm/mach-oxnas/hotplug.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> arch/arm/mach-oxnas/platsmp.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Git tip: If you redirect the output to a file (or pipe through cat), the
diffstat will be limited to 80 characters and look better in email.
Thanks,
-Olof
^ permalink raw reply
* [PATCH 0/3] Add memremap executable mapping and extend drivers/misc/sram.c
From: Dave Gerlach @ 2016-11-07 21:34 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107174309.GC2428@atomide.com>
On 11/07/2016 11:43 AM, Tony Lindgren wrote:
> * Russell King - ARM Linux <linux@armlinux.org.uk> [161107 04:05]:
>> On Thu, Oct 27, 2016 at 01:56:09PM -0500, Dave Gerlach wrote:
>>> There are several instances when one would want to execute out of on-chip
>>> SRAM, such as PM code on ARM platforms, so once again revisiting this
>>> series to allow that in a generic manner. Seems that having a solution for
>>> allowing SRAM to be mapped as executable will help clean up PM code on several
>>> ARM platforms that are using ARM internal __arm_ioremap_exec API
>>> and also open the door for PM support on new platforms like TI AM335x and
>>> AM437x. This was last sent as RFC here [1] and based on comments from Russell
>>> King and Arnd Bergmann has been rewritten to use memremap API rather than
>>> ioremap API, as executable iomem does not really make sense.
>>
>> This is better, as it avoids the issue that I pointed out last time
>> around, but I'm still left wondering about the approach.
>>
>> Sure, having executable SRAM mappings sounds nice and easy, but we're
>> creating WX mappings. Folk have spent a while improving the security of
>> the kernel by ensuring that there are no WX mappings, and this series
>> reintroduces them. The sad thing is that any WX mapping which appears
>> at a known address can be exploited.
>>
>> "A known address" can be something that appears to be random, but ends
>> up being the same across the same device type... or can be discovered
>> by some means. Eg, consider if the WX mapping is dynamically allocated,
>> but occurs at exactly the same point at boot - and if this happens with
>> android phones, consider how many of those are out there. Or if the
>> address of the WX mapping is available via some hardware register.
>> Or...
>>
>> See Kees Cook's slides at last years kernel summit -
>> https://outflux.net/slides/2015/ks/security.pdf
>>
>> So, I think avoiding WX mappings - mappings should be either W or X but
>> not both simultaneously (see page 19.)
>>
>> I guess what I'm angling at is that we don't want memremap_exec(), but
>> we need an API which changes the permissions of a SRAM mapping between
>> allowing writes and allowing execution.
>
> That should work just fine. So first copy the code to SRAM,
> then set it read-only and exectuable. Note that we need to
> restore the state of SRAM every time when returning from
> off mode during idle on some SoCs.
Thanks for all the comments. This seems like a reasonable concern. I do
agree that we would need to be able to briefly restore write permission
for things like Tony has described.
In fact, I suppose we would need this ability for every copy so that we
switch from exec to write and do the copy, then switch back to read-only
executable. We have situations where we copy multiple things, from
drivers that don't necessarily have knowledge of one another to the SRAM
space at different times.
Any opinions on where this API should live?
Regards,
Dave
>
> Regards,
>
> Tony
>
^ permalink raw reply
* [PATCH 0/3] Various ARM64 Armada DT warning fixup
From: Gregory CLEMENT @ 2016-11-07 21:41 UTC (permalink / raw)
To: linux-arm-kernel
Following the series sent for Armada 370/XP, this patchset fixes up
various warning from the DT compiler when using the flag W=1 with
make.
Being a fresh new port, the arm64 we did a better job for dt than for
the arm32 so there is only a few patches needed.
Gregory
Gregory CLEMENT (3):
arm64: dts: marvell: Fixup internal-regs DT warning for Armada 37xx
arm64: dts: marvell: Fixup config-space DT warning For Armada 7K/8K
ARM64: dts: marvell: Fixup memory DT warning for Armada 37xx
arch/arm64/boot/dts/marvell/armada-3720-db.dts | 2 +-
arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts | 2 +-
arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 2 +-
arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 2 +-
arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi | 2 +-
arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)
--
2.10.1
^ permalink raw reply
* [PATCH 1/3] arm64: dts: marvell: Fixup internal-regs DT warning for Armada 37xx
From: Gregory CLEMENT @ 2016-11-07 21:41 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107214128.18401-1-gregory.clement@free-electrons.com>
internal-regs has a ranges property so the unit name should contain an
address.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
arch/arm64/boot/dts/marvell/armada-37xx.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
index c4762538ec01..f1596daa2bc7 100644
--- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
@@ -91,7 +91,7 @@
#size-cells = <2>;
ranges;
- internal-regs {
+ internal-regs at d0000000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
--
2.10.1
^ permalink raw reply related
* [PATCH 2/3] arm64: dts: marvell: Fixup config-space DT warning For Armada 7K/8K
From: Gregory CLEMENT @ 2016-11-07 21:41 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107214128.18401-1-gregory.clement@free-electrons.com>
config-space has a ranges property so the unit name should contain an
address.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 2 +-
arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi | 2 +-
arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
index 7b6136182ad0..a749ba2edec4 100644
--- a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
@@ -71,7 +71,7 @@
interrupt-parent = <&gic>;
ranges;
- config-space {
+ config-space at f0000000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
diff --git a/arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi b/arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi
index e5e3ed678b6f..607e9a3ef834 100644
--- a/arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-cp110-master.dtsi
@@ -52,7 +52,7 @@
interrupt-parent = <&gic>;
ranges;
- config-space {
+ config-space at f2000000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
diff --git a/arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi b/arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi
index 842fb333285c..88e74069c666 100644
--- a/arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-cp110-slave.dtsi
@@ -52,7 +52,7 @@
interrupt-parent = <&gic>;
ranges;
- config-space {
+ config-space at f4000000 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
--
2.10.1
^ permalink raw reply related
* [PATCH 3/3] ARM64: dts: marvell: Fixup memory DT warning for Armada 37xx
From: Gregory CLEMENT @ 2016-11-07 21:41 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107214128.18401-1-gregory.clement@free-electrons.com>
memory has a reg property so the unit name should contain an address.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
arch/arm64/boot/dts/marvell/armada-3720-db.dts | 2 +-
arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-db.dts b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
index 1372e9a6aaa4..a260ae25b658 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
@@ -56,7 +56,7 @@
stdout-path = "serial0:115200n8";
};
- memory {
+ memory at 0 {
device_type = "memory";
reg = <0x00000000 0x00000000 0x00000000 0x20000000>;
};
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
index eadd5993c7bd..83178d909fc2 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
@@ -55,7 +55,7 @@
stdout-path = "serial0:115200n8";
};
- memory {
+ memory at 0 {
device_type = "memory";
reg = <0x00000000 0x00000000 0x00000000 0x20000000>;
};
--
2.10.1
^ permalink raw reply related
* [PATCH 2/2] ARM64: configs: Add Platform MHU in defconfig
From: Kevin Hilman @ 2016-11-07 22:06 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1478164284-24958-3-git-send-email-narmstrong@baylibre.com>
Neil Armstrong <narmstrong@baylibre.com> writes:
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
> arch/arm64/configs/defconfig | 1 +
> 1 file changed, 1 insertion(+)
Applied.
Kevin
^ permalink raw reply
* [PATCH v4 0/2] ARM: Embedding Position Independent Executables
From: Alexandre Belloni @ 2016-11-07 22:24 UTC (permalink / raw)
To: linux-arm-kernel
This series introduces Position Independent Executables (PIEs) for the
ARM architecture.
The main goal is to avoid having to write low level code in assembly as
this is currently the case for suspend/resume. Multiple platforms will
benefit from this infrastructure: at91, rockchip, am335x.
It would also be beneficial for the LPDDR support on at91 to avoid
having the handle the DDR controller from 4 different drivers.
Russell, do you see any remaining issues with the current approach?
Changes in v4:
- rebased on v4.9-rc1
- Fixed an issue with the alignment reported by Mylene
Changes in v3:
- rebased on v4.8-rc1
Changes in v2:
- handle big endian
- handle gcov and ftrace by disabling them before compilling the PIE
- Get the alignment from the original ELF to ensure the PIE is
properly aligned in SRAM.
- stop using fncpy
- rebased on v4.7-rc1
Alexandre Belloni (2):
ARM: PIE infrastructure
ARM: at91: pm: switch to the PIE infrastructure
arch/arm/Kconfig | 2 +
arch/arm/Makefile | 1 +
arch/arm/mach-at91/Kconfig | 1 +
arch/arm/mach-at91/Makefile | 2 +-
arch/arm/mach-at91/pm.c | 31 ++--
arch/arm/mach-at91/pm/.gitignore | 2 +
arch/arm/mach-at91/pm/Makefile | 3 +
arch/arm/mach-at91/pm/atmel_pm.c | 97 +++++++++++
arch/arm/mach-at91/pm_suspend.S | 338 ---------------------------------------
arch/arm/pie/Kconfig | 8 +
arch/arm/pie/Makefile | 1 +
arch/arm/pie/Makefile.pie | 86 ++++++++++
arch/arm/pie/lib/empty.c | 15 ++
arch/arm/pie/pie.c | 97 +++++++++++
arch/arm/pie/pie.lds.S | 40 +++++
include/linux/pie.h | 146 +++++++++++++++++
16 files changed, 510 insertions(+), 360 deletions(-)
create mode 100644 arch/arm/mach-at91/pm/.gitignore
create mode 100644 arch/arm/mach-at91/pm/Makefile
create mode 100644 arch/arm/mach-at91/pm/atmel_pm.c
delete mode 100644 arch/arm/mach-at91/pm_suspend.S
create mode 100644 arch/arm/pie/Kconfig
create mode 100644 arch/arm/pie/Makefile
create mode 100644 arch/arm/pie/Makefile.pie
create mode 100644 arch/arm/pie/lib/empty.c
create mode 100644 arch/arm/pie/pie.c
create mode 100644 arch/arm/pie/pie.lds.S
create mode 100644 include/linux/pie.h
--
2.10.2
^ permalink raw reply
* [PATCH v4 1/2] ARM: PIE infrastructure
From: Alexandre Belloni @ 2016-11-07 22:24 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107222458.15732-1-alexandre.belloni@free-electrons.com>
Add support for embedding position independent executables (PIE) in the
kernel. Those PIEs can then be loaded into memory allocated using genalloc.
For example, this allows running code from SRAM which is usually needed for
suspend/resume or to change the DDR timings. That code is usually written
in assembly and can now be developed in C.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/Kconfig | 2 +
arch/arm/Makefile | 1 +
arch/arm/pie/Kconfig | 8 +++
arch/arm/pie/Makefile | 1 +
arch/arm/pie/Makefile.pie | 86 +++++++++++++++++++++++++++
arch/arm/pie/lib/empty.c | 15 +++++
arch/arm/pie/pie.c | 97 ++++++++++++++++++++++++++++++
arch/arm/pie/pie.lds.S | 40 +++++++++++++
include/linux/pie.h | 146 ++++++++++++++++++++++++++++++++++++++++++++++
9 files changed, 396 insertions(+)
create mode 100644 arch/arm/pie/Kconfig
create mode 100644 arch/arm/pie/Makefile
create mode 100644 arch/arm/pie/Makefile.pie
create mode 100644 arch/arm/pie/lib/empty.c
create mode 100644 arch/arm/pie/pie.c
create mode 100644 arch/arm/pie/pie.lds.S
create mode 100644 include/linux/pie.h
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b5d529fdffab..aba849d7a7cf 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2209,3 +2209,5 @@ endif
source "lib/Kconfig"
source "arch/arm/kvm/Kconfig"
+
+source "arch/arm/pie/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 6be9ee148b78..9acb9581853a 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -282,6 +282,7 @@ core-$(CONFIG_VFP) += arch/arm/vfp/
core-$(CONFIG_XEN) += arch/arm/xen/
core-$(CONFIG_KVM_ARM_HOST) += arch/arm/kvm/
core-$(CONFIG_VDSO) += arch/arm/vdso/
+core-$(CONFIG_PIE) += arch/arm/pie/
# If we have a machine-specific directory, then include it in the build.
core-y += arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
diff --git a/arch/arm/pie/Kconfig b/arch/arm/pie/Kconfig
new file mode 100644
index 000000000000..d76122140561
--- /dev/null
+++ b/arch/arm/pie/Kconfig
@@ -0,0 +1,8 @@
+config PIE
+ bool
+ help
+ This option adds support for embedding position indepentant (PIE)
+ executables into the kernel. The PIEs can then be copied into
+ genalloc regions such as SRAM and executed. Some platforms require
+ this for suspend/resume support.
+
diff --git a/arch/arm/pie/Makefile b/arch/arm/pie/Makefile
new file mode 100644
index 000000000000..d1a6a823e431
--- /dev/null
+++ b/arch/arm/pie/Makefile
@@ -0,0 +1 @@
+obj-y += pie.o
diff --git a/arch/arm/pie/Makefile.pie b/arch/arm/pie/Makefile.pie
new file mode 100644
index 000000000000..4125da72bcaa
--- /dev/null
+++ b/arch/arm/pie/Makefile.pie
@@ -0,0 +1,86 @@
+obj-y := pie.bin.elf
+
+# Report unresolved symbol references
+ldflags-y += --no-undefined
+# Delete all temporary local symbols
+ldflags-y += -X
+
+GCOV_PROFILE := n
+
+KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
+
+ifeq ($(CONFIG_FUNCTION_TRACER),y)
+ORIG_CFLAGS := $(KBUILD_CFLAGS)
+KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
+endif
+
+# Reset objcopy flags
+OBJCOPYFLAGS =
+
+$(obj)/empty.o: arch/arm/pie/lib/empty.c FORCE
+ $(call if_changed_rule,cc_o_c)
+
+# Reference gcc builtins for use in PIE with __pie_
+$(obj)/pie_rename.syms: $(obj)/empty.o
+ @$(NM) $^ | awk '{if ($$3) print $$3,"__pie_"$(PIE_NAME)$$3}' > $@
+
+# For embedding address of the symbols copied from the PIE into the kernel
+$(obj)/pie.syms: $(obj)/pie.elf
+ @$(NM) $^ | awk '{if ($$3 && $$2 == toupper($$2)) print $$3,"=","0x"$$1";"}' > $@
+
+# Collect together the libpie objects
+LDFLAGS_libpie_stage1.o += -r
+
+$(obj)/libpie_stage1.o: $(obj)/empty.o
+ $(call if_changed,ld)
+
+# Rename the libpie gcc builtins with a __pie_ prefix
+OBJCOPYFLAGS_libpie_stage2.o += --redefine-syms=$(obj)/pie_rename.syms
+
+$(obj)/libpie_stage2.o: $(obj)/libpie_stage1.o
+ $(call if_changed,objcopy)
+
+CFLAGS_$(PIE_NAME).o += -fPIE
+
+OBJCOPYFLAGS_pie_stage1.o += --redefine-syms=$(obj)/pie_rename.syms
+$(obj)/pie_stage1.o: $(obj)/$(PIE_NAME).o $(obj)/pie_rename.syms
+ $(call if_changed,objcopy)
+
+LDFLAGS_pie_stage2.o += -r
+
+$(obj)/pie_stage2.o: $(obj)/pie_stage1.o $(obj)/libpie_stage2.o
+ $(call if_changed,ld)
+
+SEDFLAGS_lds = s/PIE_NAME/$(PIE_NAME)/
+$(obj)/pie.lds.S: arch/arm/pie/pie.lds.S
+ @sed "$(SEDFLAGS_lds)" < $< > $@
+
+# Create the position independent executable
+LDFLAGS_pie.elf += -Bstatic -T $(obj)/pie.lds
+
+$(obj)/pie.elf: $(obj)/pie_stage2.o $(obj)/pie.lds
+ $(call if_changed,ld)
+
+# Create binary data for the kernel
+OBJCOPYFLAGS_pie.bin += -O binary
+
+$(obj)/pie.bin: $(obj)/pie.elf
+ $(call if_changed,objcopy)
+
+# Import the data into the kernel
+ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
+OBJCOPYFLAGS_pie.bin.o += -B $(ARCH) -I binary -O elf32-bigarm
+else
+OBJCOPYFLAGS_pie.bin.o += -B $(ARCH) -I binary -O elf32-littlearm
+endif
+
+$(obj)/pie.al.c: $(obj)/pie.elf
+ @$(OBJDUMP) -h --section .text $^ | awk '{sub(/2\*\*/,"(1 << ",$$7);if ($$2 == ".text") print "unsigned int __pie_$(PIE_NAME)_align = "$$7");"}' > $@
+
+$(obj)/pie.bin.o: $(obj)/pie.bin
+ $(call if_changed,objcopy)
+
+LDFLAGS_pie.bin.elf += --just-symbols=$(obj)/pie.syms -r
+$(obj)/pie.bin.elf: $(obj)/pie.bin.o $(obj)/pie.al.o $(obj)/pie.syms
+ $(call if_changed,ld)
+
diff --git a/arch/arm/pie/lib/empty.c b/arch/arm/pie/lib/empty.c
new file mode 100644
index 000000000000..9a6d54956379
--- /dev/null
+++ b/arch/arm/pie/lib/empty.c
@@ -0,0 +1,15 @@
+void __div0(void)
+{
+};
+
+void __aeabi_unwind_cpp_pr0(void)
+{
+};
+
+void __aeabi_unwind_cpp_pr1(void)
+{
+};
+
+void __aeabi_unwind_cpp_pr2(void)
+{
+};
diff --git a/arch/arm/pie/pie.c b/arch/arm/pie/pie.c
new file mode 100644
index 000000000000..b32aa4cb11a8
--- /dev/null
+++ b/arch/arm/pie/pie.c
@@ -0,0 +1,97 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/genalloc.h>
+#include <linux/pie.h>
+#include <asm/cacheflush.h>
+
+struct pie_chunk {
+ struct gen_pool *pool;
+ unsigned long addr;
+ unsigned int align_offset;
+ size_t sz;
+};
+
+struct pie_chunk *__pie_load_data(struct gen_pool *pool, void *code_start,
+ void *code_end, unsigned int align)
+{
+ struct pie_chunk *chunk;
+ unsigned long offset;
+ int ret;
+ size_t code_sz;
+ unsigned long base;
+ phys_addr_t pbase;
+
+ chunk = kzalloc(sizeof(*chunk), GFP_KERNEL);
+ if (!chunk) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ code_sz = code_end - code_start;
+ chunk->pool = pool;
+ chunk->sz = code_sz;
+
+ base = gen_pool_alloc(pool, chunk->sz + align);
+ if (!base) {
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ pbase = gen_pool_virt_to_phys(pool, base);
+ chunk->addr = (unsigned long)__arm_ioremap_exec(pbase, code_sz, false);
+ if (!chunk->addr) {
+ ret = -ENOMEM;
+ goto err_remap;
+ }
+
+ chunk->align_offset = chunk->addr % align;
+ chunk->addr += chunk->align_offset;
+
+ memcpy((char *)chunk->addr, code_start, code_sz);
+ flush_icache_range(chunk->addr, chunk->addr + code_sz);
+
+ offset = gen_pool_virt_to_phys(pool, chunk->addr);
+
+ return chunk;
+
+err_remap:
+ gen_pool_free(chunk->pool, chunk->addr, chunk->sz);
+
+err_free:
+ kfree(chunk);
+err:
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(__pie_load_data);
+
+phys_addr_t pie_to_phys(struct pie_chunk *chunk, unsigned long addr)
+{
+ return gen_pool_virt_to_phys(chunk->pool, addr);
+}
+EXPORT_SYMBOL_GPL(pie_to_phys);
+
+void __iomem *__kern_to_pie(struct pie_chunk *chunk, void *ptr)
+{
+ uintptr_t offset = (uintptr_t)ptr;
+
+ if (offset >= chunk->sz)
+ return NULL;
+ else
+ return (void *)(chunk->addr + offset);
+}
+EXPORT_SYMBOL_GPL(__kern_to_pie);
+
+void pie_free(struct pie_chunk *chunk)
+{
+ gen_pool_free(chunk->pool, chunk->addr, chunk->sz);
+ kfree(chunk);
+}
+EXPORT_SYMBOL_GPL(pie_free);
diff --git a/arch/arm/pie/pie.lds.S b/arch/arm/pie/pie.lds.S
new file mode 100644
index 000000000000..e640c93f5bc8
--- /dev/null
+++ b/arch/arm/pie/pie.lds.S
@@ -0,0 +1,40 @@
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+
+#include <linux/export.h>
+
+SECTIONS
+{
+ /* Don't need unwind tables */
+ /DISCARD/ : {
+ *(.ARM.exidx*)
+ *(.ARM.extab*)
+ *(.comment)
+ }
+
+ . = 0x0;
+
+ ____pie_PIE_NAME_start : {
+ VMLINUX_SYMBOL(__pie_PIE_NAME_start) = .;
+ }
+
+ .text : {
+ . = ALIGN(4);
+ KEEP(*(.text))
+ }
+
+ .rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) }
+ . = ALIGN(4);
+
+ .data : {
+ *(SORT_BY_ALIGNMENT(.data*))
+ . = ALIGN(4);
+
+ *(SORT_BY_ALIGNMENT(.bss*))
+ . = ALIGN(4);
+ }
+
+ ____pie_PIE_NAME_end : {
+ VMLINUX_SYMBOL(__pie_PIE_NAME_end) = .;
+ }
+}
diff --git a/include/linux/pie.h b/include/linux/pie.h
new file mode 100644
index 000000000000..cec58384dda2
--- /dev/null
+++ b/include/linux/pie.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2013 Texas Instruments, Inc.
+ * Russ Dill <russ.dill@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#ifndef _LINUX_PIE_H
+#define _LINUX_PIE_H
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+
+#include <asm/fncpy.h>
+#include <linux/bug.h>
+
+struct gen_pool;
+struct pie_chunk;
+
+#ifdef CONFIG_PIE
+
+/**
+ * __pie_load_data - load and fixup PIE code from kernel data
+ * @pool: pool to allocate memory from and copy code into
+ * @start: virtual start address in kernel of chunk specific code
+ * @end: virtual end address in kernel of chunk specific code
+ * @phys: %true to fixup to physical address of destination, %false to
+ * fixup to virtual address of destination
+ *
+ * Returns 0 on success, -EERROR otherwise
+ */
+struct pie_chunk *__pie_load_data(struct gen_pool *pool, void *start, void *end,
+ unsigned int align);
+
+/**
+ * pie_to_phys - translate a virtual PIE address into a physical one
+ * @chunk: identifier returned by pie_load_sections
+ * @addr: virtual address within pie chunk
+ *
+ * Returns physical address on success, -1 otherwise
+ */
+phys_addr_t pie_to_phys(struct pie_chunk *chunk, unsigned long addr);
+
+void __iomem *__kern_to_pie(struct pie_chunk *chunk, void *ptr);
+
+/**
+ * pie_free - free the pool space used by an pie chunk
+ * @chunk: identifier returned by pie_load_sections
+ */
+void pie_free(struct pie_chunk *chunk);
+
+#define __pie_load_sections(pool, name, folder) ({ \
+ extern char _binary_##folder##_pie_bin_start[]; \
+ extern char __pie_##name##_start[]; \
+ extern char __pie_##name##_end[]; \
+ extern unsigned int __pie_##name##_align; \
+ char *start = _binary_##folder##_pie_bin_start + \
+ (unsigned long)__pie_##name##_start; \
+ char *end = _binary_##folder##_pie_bin_start + \
+ (unsigned long)__pie_##name##_end; \
+ __pie_load_data(pool, start, end, __pie_##name##_align); \
+})
+
+/*
+ * Required for any symbol within an PIE section that is referenced by the
+ * kernel
+ */
+#define EXPORT_PIE_SYMBOL(sym) extern typeof(sym) sym __weak
+
+#else
+
+static inline struct pie_chunk *__pie_load_data(struct gen_pool *pool,
+ void *start, void *end,
+ unsigned int algin)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline phys_addr_t pie_to_phys(struct pie_chunk *chunk,
+ unsigned long addr)
+{
+ return -1;
+}
+
+static inline void __iomem *__kern_to_pie(struct pie_chunk *chunk, void *ptr)
+{
+ return NULL;
+}
+
+static inline void pie_free(struct pie_chunk *chunk)
+{
+}
+
+#define __pie_load_sections(pool, name, folder, phys) ({ ERR_PTR(-EINVAL); })
+
+#endif
+
+/**
+ * pie_load_sections - load and fixup sections associated with the given name
+ * @pool: pool to allocate memory from and copy code into
+ * fixup to virtual address of destination
+ * @name: the name given to __pie() and __pie_data() when marking
+ * data and code
+ *
+ * Returns 0 on success, -EERROR otherwise
+ */
+#define pie_load_sections(pool, name, folder) ({ \
+ __pie_load_sections(pool, name, folder); \
+})
+
+/**
+ * kern_to_pie - convert a kernel symbol to the virtual address of where
+ * that symbol is loaded into the given PIE chunk.
+ *
+ * @chunk: identifier returned by pie_load_sections
+ * @p: symbol to convert
+ *
+ * Return type is the same as type passed
+ */
+#define kern_to_pie(chunk, p) ({ \
+ void *__ptr = (void *)(p); \
+ typeof(p) __result = (typeof(p))__kern_to_pie(chunk, __ptr); \
+ __result; \
+})
+
+/**
+ * kern_to_fn - convert a kernel function symbol to the virtual address of where
+ * that symbol is loaded into the given PIE chunk
+ *
+ * @chunk: identifier returned by pie_load_sections
+ * @funcp: function to convert
+ *
+ * Return type is the same as type passed
+ */
+#define fn_to_pie(chunk, funcp) ({ \
+ uintptr_t __kern_addr, __pie_addr; \
+ \
+ __kern_addr = (uintptr_t)funcp; \
+ __pie_addr = kern_to_pie(chunk, __kern_addr); \
+ \
+ (typeof(&funcp))(__pie_addr); \
+})
+
+#endif
--
2.10.2
^ permalink raw reply related
* [PATCH v4 2/2] ARM: at91: pm: switch to the PIE infrastructure
From: Alexandre Belloni @ 2016-11-07 22:24 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <20161107222458.15732-1-alexandre.belloni@free-electrons.com>
Using the PIE infrastructure allows to write the whole suspend/resume
functions in C instead of assembly.
The only remaining assembly instruction is wfi for armv5
It makes the code shorter and clearer.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
---
arch/arm/mach-at91/Kconfig | 1 +
arch/arm/mach-at91/Makefile | 2 +-
arch/arm/mach-at91/pm.c | 31 ++--
arch/arm/mach-at91/pm/.gitignore | 2 +
arch/arm/mach-at91/pm/Makefile | 3 +
arch/arm/mach-at91/pm/atmel_pm.c | 97 +++++++++++
arch/arm/mach-at91/pm_suspend.S | 338 ---------------------------------------
7 files changed, 114 insertions(+), 360 deletions(-)
create mode 100644 arch/arm/mach-at91/pm/.gitignore
create mode 100644 arch/arm/mach-at91/pm/Makefile
create mode 100644 arch/arm/mach-at91/pm/atmel_pm.c
delete mode 100644 arch/arm/mach-at91/pm_suspend.S
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 841e924143f9..cecb20efbf3c 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -5,6 +5,7 @@ menuconfig ARCH_AT91
select GPIOLIB
select PINCTRL
select SOC_BUS
+ select PIE
if ARCH_AT91
config SOC_SAMA5D2
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index c5bbf8bb8c0f..062336de4f66 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -10,7 +10,7 @@ obj-$(CONFIG_SOC_SAMA5) += sama5.o
# Power Management
obj-$(CONFIG_PM) += pm.o
-obj-$(CONFIG_PM) += pm_suspend.o
+obj-$(CONFIG_PM) += pm/
ifeq ($(CONFIG_CPU_V7),y)
AFLAGS_pm_suspend.o := -march=armv7-a
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index b4332b727e9c..f0a3eee73b86 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -21,6 +21,7 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
+#include <linux/pie.h>
#include <linux/platform_device.h>
#include <linux/platform_data/atmel.h>
#include <linux/io.h>
@@ -57,6 +58,8 @@ static struct {
void __iomem *at91_ramc_base[2];
+static struct pie_chunk *atmel_pm_pie;
+
static int at91_pm_valid_state(suspend_state_t state)
{
switch (state) {
@@ -134,10 +137,6 @@ EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
static void (*at91_suspend_sram_fn)(void __iomem *pmc, void __iomem *ramc0,
void __iomem *ramc1, int memctrl);
-extern void at91_pm_suspend_in_sram(void __iomem *pmc, void __iomem *ramc0,
- void __iomem *ramc1, int memctrl);
-extern u32 at91_pm_suspend_in_sram_sz;
-
static void at91_pm_suspend(suspend_state_t state)
{
unsigned int pm_data = at91_pm_data.memctrl;
@@ -371,11 +370,12 @@ static void at91sam9_idle(void)
cpu_do_idle();
}
+extern void atmel_pm_suspend(void __iomem *pmc, void __iomem *ramc0,
+ void __iomem *ramc1, int memctrl);
+
static void __init at91_pm_sram_init(void)
{
struct gen_pool *sram_pool;
- phys_addr_t sram_pbase;
- unsigned long sram_base;
struct device_node *node;
struct platform_device *pdev = NULL;
@@ -398,23 +398,12 @@ static void __init at91_pm_sram_init(void)
return;
}
- sram_base = gen_pool_alloc(sram_pool, at91_pm_suspend_in_sram_sz);
- if (!sram_base) {
- pr_warn("%s: unable to alloc sram!\n", __func__);
+ atmel_pm_pie = pie_load_sections(sram_pool, atmel_pm,
+ arch_arm_mach_at91_pm);
+ if (IS_ERR(atmel_pm_pie))
return;
- }
-
- sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base);
- at91_suspend_sram_fn = __arm_ioremap_exec(sram_pbase,
- at91_pm_suspend_in_sram_sz, false);
- if (!at91_suspend_sram_fn) {
- pr_warn("SRAM: Could not map\n");
- return;
- }
- /* Copy the pm suspend handler to SRAM */
- at91_suspend_sram_fn = fncpy(at91_suspend_sram_fn,
- &at91_pm_suspend_in_sram, at91_pm_suspend_in_sram_sz);
+ at91_suspend_sram_fn = fn_to_pie(atmel_pm_pie, atmel_pm_suspend);
}
static const struct of_device_id atmel_pmc_ids[] __initconst = {
diff --git a/arch/arm/mach-at91/pm/.gitignore b/arch/arm/mach-at91/pm/.gitignore
new file mode 100644
index 000000000000..1cb8879eb0bf
--- /dev/null
+++ b/arch/arm/mach-at91/pm/.gitignore
@@ -0,0 +1,2 @@
+*.lds*
+*.syms
diff --git a/arch/arm/mach-at91/pm/Makefile b/arch/arm/mach-at91/pm/Makefile
new file mode 100644
index 000000000000..c12d54862c10
--- /dev/null
+++ b/arch/arm/mach-at91/pm/Makefile
@@ -0,0 +1,3 @@
+PIE_NAME := atmel_pm
+
+include arch/arm/pie/Makefile.pie
diff --git a/arch/arm/mach-at91/pm/atmel_pm.c b/arch/arm/mach-at91/pm/atmel_pm.c
new file mode 100644
index 000000000000..7f391addd2da
--- /dev/null
+++ b/arch/arm/mach-at91/pm/atmel_pm.c
@@ -0,0 +1,97 @@
+#include <linux/io.h>
+#include <linux/clk/at91_pmc.h>
+#include <linux/mfd/syscon/atmel-mc.h>
+#include <linux/pie.h>
+#include "../pm.h"
+
+#define SRAMC_SELF_FRESH_ACTIVE 0x01
+#define SRAMC_SELF_FRESH_EXIT 0x00
+
+static void at91_sramc_self_refresh(unsigned int is_active,
+ unsigned int memtype,
+ void __iomem *sdramc_base,
+ void __iomem *sdramc_base1)
+{
+ static unsigned int lpr, mdr, lpr1, mdr1;
+
+ switch (memtype) {
+ case AT91_MEMCTRL_MC:
+ /*
+ * at91rm9200 Memory controller
+ */
+ if (is_active)
+ __raw_writel(1, sdramc_base + AT91_MC_SDRAMC_SRR);
+ break;
+
+ case AT91_MEMCTRL_DDRSDR:
+ if (is_active) {
+ mdr = __raw_readl(sdramc_base + AT91_DDRSDRC_MDR);
+ lpr = __raw_readl(sdramc_base + AT91_DDRSDRC_LPR);
+
+ if ((mdr & AT91_DDRSDRC_MD) == AT91_DDRSDRC_MD_LOW_POWER_DDR)
+ __raw_writel((mdr & ~AT91_DDRSDRC_MD) |
+ AT91_DDRSDRC_MD_DDR2, sdramc_base +
+ AT91_DDRSDRC_MDR);
+ __raw_writel((lpr & ~AT91_DDRSDRC_LPCB) |
+ AT91_DDRSDRC_LPCB_SELF_REFRESH, sdramc_base
+ + AT91_DDRSDRC_LPR);
+
+ if (sdramc_base1) {
+ mdr1 = __raw_readl(sdramc_base1 + AT91_DDRSDRC_MDR);
+ lpr1 = __raw_readl(sdramc_base1 + AT91_DDRSDRC_LPR);
+ if ((mdr1 & AT91_DDRSDRC_MD) == AT91_DDRSDRC_MD_LOW_POWER_DDR)
+ __raw_writel((mdr1 & ~AT91_DDRSDRC_MD) |
+ AT91_DDRSDRC_MD_DDR2,
+ sdramc_base1 +
+ AT91_DDRSDRC_MDR);
+ __raw_writel((lpr1 & ~AT91_DDRSDRC_LPCB) |
+ AT91_DDRSDRC_LPCB_SELF_REFRESH,
+ sdramc_base1 + AT91_DDRSDRC_LPR);
+ }
+ } else {
+ __raw_writel(mdr, sdramc_base + AT91_DDRSDRC_MDR);
+ __raw_writel(lpr, sdramc_base + AT91_DDRSDRC_LPR);
+ if (sdramc_base1) {
+ __raw_writel(mdr, sdramc_base1 + AT91_DDRSDRC_MDR);
+ __raw_writel(lpr, sdramc_base1 + AT91_DDRSDRC_LPR);
+ }
+ }
+ break;
+
+ case AT91_MEMCTRL_SDRAMC:
+ if (is_active) {
+ lpr = __raw_readl(sdramc_base + AT91_SDRAMC_LPR);
+
+ __raw_writel((lpr & ~AT91_SDRAMC_LPCB) |
+ AT91_SDRAMC_LPCB_SELF_REFRESH, sdramc_base
+ + AT91_SDRAMC_LPR);
+ } else {
+ __raw_writel(lpr, sdramc_base + AT91_SDRAMC_LPR);
+ }
+ break;
+ }
+}
+
+void atmel_pm_suspend(void __iomem *pmc, void __iomem *ramc0,
+ void __iomem *ramc1, int memctrl)
+{
+ int memtype, pm_mode;
+
+ memtype = memctrl & AT91_PM_MEMTYPE_MASK;
+ pm_mode = (memctrl >> AT91_PM_MODE_OFFSET) & AT91_PM_MODE_MASK;
+
+ dsb();
+
+ at91_sramc_self_refresh(1, memtype, ramc0, ramc1);
+
+#if defined(CONFIG_CPU_V7)
+ dsb();
+ wfi();
+#else
+ asm volatile ("mcr p15, 0, %0, c7, c0, 4" \
+ : : "r" (0) : "memory");
+#endif
+
+ at91_sramc_self_refresh(0, memtype, ramc0, ramc1);
+}
+EXPORT_PIE_SYMBOL(atmel_pm_suspend);
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
deleted file mode 100644
index a25defda3d22..000000000000
--- a/arch/arm/mach-at91/pm_suspend.S
+++ /dev/null
@@ -1,338 +0,0 @@
-/*
- * arch/arm/mach-at91/pm_slow_clock.S
- *
- * Copyright (C) 2006 Savin Zlobec
- *
- * AT91SAM9 support:
- * Copyright (C) 2007 Anti Sullin <anti.sullin@artecdesign.ee
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-#include <linux/linkage.h>
-#include <linux/clk/at91_pmc.h>
-#include "pm.h"
-
-#define SRAMC_SELF_FRESH_ACTIVE 0x01
-#define SRAMC_SELF_FRESH_EXIT 0x00
-
-pmc .req r0
-tmp1 .req r4
-tmp2 .req r5
-
-/*
- * Wait until master clock is ready (after switching master clock source)
- */
- .macro wait_mckrdy
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_MCKRDY
- beq 1b
- .endm
-
-/*
- * Wait until master oscillator has stabilized.
- */
- .macro wait_moscrdy
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_MOSCS
- beq 1b
- .endm
-
-/*
- * Wait until PLLA has locked.
- */
- .macro wait_pllalock
-1: ldr tmp1, [pmc, #AT91_PMC_SR]
- tst tmp1, #AT91_PMC_LOCKA
- beq 1b
- .endm
-
-/*
- * Put the processor to enter the idle state
- */
- .macro at91_cpu_idle
-
-#if defined(CONFIG_CPU_V7)
- mov tmp1, #AT91_PMC_PCK
- str tmp1, [pmc, #AT91_PMC_SCDR]
-
- dsb
-
- wfi @ Wait For Interrupt
-#else
- mcr p15, 0, tmp1, c7, c0, 4
-#endif
-
- .endm
-
- .text
-
- .arm
-
-/*
- * void at91_pm_suspend_in_sram(void __iomem *pmc, void __iomem *sdramc,
- * void __iomem *ramc1, int memctrl)
- * @input param:
- * @r0: base address of AT91_PMC
- * @r1: base address of SDRAM Controller (SDRAM, DDRSDR, or AT91_SYS)
- * @r2: base address of second SDRAM Controller or 0 if not present
- * @r3: pm information
- */
-/* at91_pm_suspend_in_sram must be 8-byte aligned per the requirements of fncpy() */
- .align 3
-ENTRY(at91_pm_suspend_in_sram)
- /* Save registers on stack */
- stmfd sp!, {r4 - r12, lr}
-
- /* Drain write buffer */
- mov tmp1, #0
- mcr p15, 0, tmp1, c7, c10, 4
-
- str r0, .pmc_base
- str r1, .sramc_base
- str r2, .sramc1_base
-
- and r0, r3, #AT91_PM_MEMTYPE_MASK
- str r0, .memtype
-
- lsr r0, r3, #AT91_PM_MODE_OFFSET
- and r0, r0, #AT91_PM_MODE_MASK
- str r0, .pm_mode
-
- /* Active the self-refresh mode */
- mov r0, #SRAMC_SELF_FRESH_ACTIVE
- bl at91_sramc_self_refresh
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_disable_main_clock
-
- ldr pmc, .pmc_base
-
- /* Save Master clock setting */
- ldr tmp1, [pmc, #AT91_PMC_MCKR]
- str tmp1, .saved_mckr
-
- /*
- * Set the Master clock source to slow clock
- */
- bic tmp1, tmp1, #AT91_PMC_CSS
- str tmp1, [pmc, #AT91_PMC_MCKR]
-
- wait_mckrdy
-
- /* Save PLLA setting and disable it */
- ldr tmp1, [pmc, #AT91_CKGR_PLLAR]
- str tmp1, .saved_pllar
-
- mov tmp1, #AT91_PMC_PLLCOUNT
- orr tmp1, tmp1, #(1 << 29) /* bit 29 always set */
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
- /* Turn off the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- bic tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
-skip_disable_main_clock:
- ldr pmc, .pmc_base
-
- /* Wait for interrupt */
- at91_cpu_idle
-
- ldr r0, .pm_mode
- tst r0, #AT91_PM_SLOW_CLOCK
- beq skip_enable_main_clock
-
- ldr pmc, .pmc_base
-
- /* Turn on the main oscillator */
- ldr tmp1, [pmc, #AT91_CKGR_MOR]
- orr tmp1, tmp1, #AT91_PMC_MOSCEN
- orr tmp1, tmp1, #AT91_PMC_KEY
- str tmp1, [pmc, #AT91_CKGR_MOR]
-
- wait_moscrdy
-
- /* Restore PLLA setting */
- ldr tmp1, .saved_pllar
- str tmp1, [pmc, #AT91_CKGR_PLLAR]
-
- tst tmp1, #(AT91_PMC_MUL & 0xff0000)
- bne 3f
- tst tmp1, #(AT91_PMC_MUL & ~0xff0000)
- beq 4f
-3:
- wait_pllalock
-4:
-
- /*
- * Restore master clock setting
- */
- ldr tmp1, .saved_mckr
- str tmp1, [pmc, #AT91_PMC_MCKR]
-
- wait_mckrdy
-
-skip_enable_main_clock:
- /* Exit the self-refresh mode */
- mov r0, #SRAMC_SELF_FRESH_EXIT
- bl at91_sramc_self_refresh
-
- /* Restore registers, and return */
- ldmfd sp!, {r4 - r12, pc}
-ENDPROC(at91_pm_suspend_in_sram)
-
-/*
- * void at91_sramc_self_refresh(unsigned int is_active)
- *
- * @input param:
- * @r0: 1 - active self-refresh mode
- * 0 - exit self-refresh mode
- * register usage:
- * @r1: memory type
- * @r2: base address of the sram controller
- */
-
-ENTRY(at91_sramc_self_refresh)
- ldr r1, .memtype
- ldr r2, .sramc_base
-
- cmp r1, #AT91_MEMCTRL_MC
- bne ddrc_sf
-
- /*
- * at91rm9200 Memory controller
- */
-
- /*
- * For exiting the self-refresh mode, do nothing,
- * automatically exit the self-refresh mode.
- */
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq exit_sramc_sf
-
- /* Active SDRAM self-refresh mode */
- mov r3, #1
- str r3, [r2, #AT91_MC_SDRAMC_SRR]
- b exit_sramc_sf
-
-ddrc_sf:
- cmp r1, #AT91_MEMCTRL_DDRSDR
- bne sdramc_sf
-
- /*
- * DDR Memory controller
- */
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq ddrc_exit_sf
-
- /* LPDDR1 --> force DDR2 mode during self-refresh */
- ldr r3, [r2, #AT91_DDRSDRC_MDR]
- str r3, .saved_sam9_mdr
- bic r3, r3, #~AT91_DDRSDRC_MD
- cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq r3, [r2, #AT91_DDRSDRC_MDR]
- biceq r3, r3, #AT91_DDRSDRC_MD
- orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
- streq r3, [r2, #AT91_DDRSDRC_MDR]
-
- /* Active DDRC self-refresh mode */
- ldr r3, [r2, #AT91_DDRSDRC_LPR]
- str r3, .saved_sam9_lpr
- bic r3, r3, #AT91_DDRSDRC_LPCB
- orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
- str r3, [r2, #AT91_DDRSDRC_LPR]
-
- /* If using the 2nd ddr controller */
- ldr r2, .sramc1_base
- cmp r2, #0
- beq no_2nd_ddrc
-
- ldr r3, [r2, #AT91_DDRSDRC_MDR]
- str r3, .saved_sam9_mdr1
- bic r3, r3, #~AT91_DDRSDRC_MD
- cmp r3, #AT91_DDRSDRC_MD_LOW_POWER_DDR
- ldreq r3, [r2, #AT91_DDRSDRC_MDR]
- biceq r3, r3, #AT91_DDRSDRC_MD
- orreq r3, r3, #AT91_DDRSDRC_MD_DDR2
- streq r3, [r2, #AT91_DDRSDRC_MDR]
-
- /* Active DDRC self-refresh mode */
- ldr r3, [r2, #AT91_DDRSDRC_LPR]
- str r3, .saved_sam9_lpr1
- bic r3, r3, #AT91_DDRSDRC_LPCB
- orr r3, r3, #AT91_DDRSDRC_LPCB_SELF_REFRESH
- str r3, [r2, #AT91_DDRSDRC_LPR]
-
-no_2nd_ddrc:
- b exit_sramc_sf
-
-ddrc_exit_sf:
- /* Restore MDR in case of LPDDR1 */
- ldr r3, .saved_sam9_mdr
- str r3, [r2, #AT91_DDRSDRC_MDR]
- /* Restore LPR on AT91 with DDRAM */
- ldr r3, .saved_sam9_lpr
- str r3, [r2, #AT91_DDRSDRC_LPR]
-
- /* If using the 2nd ddr controller */
- ldr r2, .sramc1_base
- cmp r2, #0
- ldrne r3, .saved_sam9_mdr1
- strne r3, [r2, #AT91_DDRSDRC_MDR]
- ldrne r3, .saved_sam9_lpr1
- strne r3, [r2, #AT91_DDRSDRC_LPR]
-
- b exit_sramc_sf
-
- /*
- * SDRAMC Memory controller
- */
-sdramc_sf:
- tst r0, #SRAMC_SELF_FRESH_ACTIVE
- beq sdramc_exit_sf
-
- /* Active SDRAMC self-refresh mode */
- ldr r3, [r2, #AT91_SDRAMC_LPR]
- str r3, .saved_sam9_lpr
- bic r3, r3, #AT91_SDRAMC_LPCB
- orr r3, r3, #AT91_SDRAMC_LPCB_SELF_REFRESH
- str r3, [r2, #AT91_SDRAMC_LPR]
-
-sdramc_exit_sf:
- ldr r3, .saved_sam9_lpr
- str r3, [r2, #AT91_SDRAMC_LPR]
-
-exit_sramc_sf:
- mov pc, lr
-ENDPROC(at91_sramc_self_refresh)
-
-.pmc_base:
- .word 0
-.sramc_base:
- .word 0
-.sramc1_base:
- .word 0
-.memtype:
- .word 0
-.pm_mode:
- .word 0
-.saved_mckr:
- .word 0
-.saved_pllar:
- .word 0
-.saved_sam9_lpr:
- .word 0
-.saved_sam9_lpr1:
- .word 0
-.saved_sam9_mdr:
- .word 0
-.saved_sam9_mdr1:
- .word 0
-
-ENTRY(at91_pm_suspend_in_sram_sz)
- .word .-at91_pm_suspend_in_sram
--
2.10.2
^ permalink raw reply related
* [PATCH 2/8] ARM64: dts: meson-gxl: Add pinctrl nodes
From: Kevin Hilman @ 2016-11-07 22:30 UTC (permalink / raw)
To: linux-arm-kernel
In-Reply-To: <1477932286-27482-3-git-send-email-narmstrong@baylibre.com>
Neil Armstrong <narmstrong@baylibre.com> writes:
> Add pinctrl nodes and pin definitions for Amlogic Meson GXL.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
> arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 168 +++++++++++++++++++++++++++++
> 1 file changed, 168 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> index 13b10ee..ce7f550 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
> @@ -42,7 +42,175 @@
> */
>
> #include "meson-gx.dtsi"
> +#include <dt-bindings/gpio/meson-gxl-gpio.h>
Oops, this has a dependency on the patch going through the pinctrl tree,
which causes probelems we like to avoid in the arm-soc tree.
For now, I've changed this to use the GXBB include since the values used
are the same, but we can fix this for good in v4.10-rc, after the GXL
pinctrl changes are merged.
Kevin
[1] [PATCH] pinctrl: meson: Add GXL pinctrl definitions
> / {
> compatible = "amlogic,meson-gxl";
> };
> +
> +&aobus {
> + pinctrl_aobus: pinctrl at 14 {
> + compatible = "amlogic,meson-gxl-aobus-pinctrl";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + gpio_ao: bank at 14 {
> + reg = <0x0 0x00014 0x0 0x8>,
> + <0x0 0x0002c 0x0 0x4>,
> + <0x0 0x00024 0x0 0x8>;
> + reg-names = "mux", "pull", "gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
> + };
> +
> + uart_ao_a_pins: uart_ao_a {
> + mux {
> + groups = "uart_tx_ao_a", "uart_rx_ao_a";
> + function = "uart_ao";
> + };
> + };
> +
> + remote_input_ao_pins: remote_input_ao {
> + mux {
> + groups = "remote_input_ao";
> + function = "remote_input_ao";
> + };
> + };
> + };
> +};
> +
> +&periphs {
> + pinctrl_periphs: pinctrl at 4b0 {
> + compatible = "amlogic,meson-gxl-periphs-pinctrl";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + gpio: bank at 4b0 {
> + reg = <0x0 0x004b0 0x0 0x28>,
> + <0x0 0x004e8 0x0 0x14>,
> + <0x0 0x00120 0x0 0x14>,
> + <0x0 0x00430 0x0 0x40>;
> + reg-names = "mux", "pull", "pull-enable", "gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
> + };
> +
> + emmc_pins: emmc {
> + mux {
> + groups = "emmc_nand_d07",
> + "emmc_cmd",
> + "emmc_clk",
> + "emmc_ds";
> + function = "emmc";
> + };
> + };
> +
> + sdcard_pins: sdcard {
> + mux {
> + groups = "sdcard_d0",
> + "sdcard_d1",
> + "sdcard_d2",
> + "sdcard_d3",
> + "sdcard_cmd",
> + "sdcard_clk";
> + function = "sdcard";
> + };
> + };
> +
> + sdio_pins: sdio {
> + mux {
> + groups = "sdio_d0",
> + "sdio_d1",
> + "sdio_d2",
> + "sdio_d3",
> + "sdio_cmd",
> + "sdio_clk";
> + function = "sdio";
> + };
> + };
> +
> + sdio_irq_pins: sdio_irq {
> + mux {
> + groups = "sdio_irq";
> + function = "sdio";
> + };
> + };
> +
> + uart_a_pins: uart_a {
> + mux {
> + groups = "uart_tx_a",
> + "uart_rx_a";
> + function = "uart_a";
> + };
> + };
> +
> + uart_b_pins: uart_b {
> + mux {
> + groups = "uart_tx_b",
> + "uart_rx_b";
> + function = "uart_b";
> + };
> + };
> +
> + uart_c_pins: uart_c {
> + mux {
> + groups = "uart_tx_c",
> + "uart_rx_c";
> + function = "uart_c";
> + };
> + };
> +
> + i2c_a_pins: i2c_a {
> + mux {
> + groups = "i2c_sck_a",
> + "i2c_sda_a";
> + function = "i2c_a";
> + };
> + };
> +
> + i2c_b_pins: i2c_b {
> + mux {
> + groups = "i2c_sck_b",
> + "i2c_sda_b";
> + function = "i2c_b";
> + };
> + };
> +
> + i2c_c_pins: i2c_c {
> + mux {
> + groups = "i2c_sck_c",
> + "i2c_sda_c";
> + function = "i2c_c";
> + };
> + };
> +
> + eth_pins: eth_c {
> + mux {
> + groups = "eth_mdio",
> + "eth_mdc",
> + "eth_clk_rx_clk",
> + "eth_rx_dv",
> + "eth_rxd0",
> + "eth_rxd1",
> + "eth_rxd2",
> + "eth_rxd3",
> + "eth_rgmii_tx_clk",
> + "eth_tx_en",
> + "eth_txd0",
> + "eth_txd1",
> + "eth_txd2",
> + "eth_txd3";
> + function = "eth";
> + };
> + };
> +
> + pwm_e_pins: pwm_e {
> + mux {
> + groups = "pwm_e";
> + function = "pwm_e";
> + };
> + };
> + };
> +};
^ permalink raw reply
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