[PATCH 04/10] USB: EHCI: make ehci-orion a separate driver

manjunath.goudar at linaro.org
2013-02-07T17:34:01Z

From: Manjunath Goudar <manjunath.goudar@linaro.org>

Separate the Marvell Orion host controller driver from ehci-hcd host code
into its own driver module.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Greg KH <greg@kroah.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
---
drivers/usb/host/Kconfig | 7 +++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-hcd.c | 27 +++++-------
drivers/usb/host/ehci-orion.c | 98 +++++++++++++++++++++--------------------
4 files changed, 69 insertions(+), 64 deletions(-)

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 4413075..3689b7b 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -169,6 +169,13 @@ config USB_EHCI_HCD_SPEAR
---help---
Enables support for the on-chip EHCI controller on
ST spear chips.
+config USB_EHCI_HCD_ORION
+ tristate "Support for Marvell Orion on-chip EHCI USB controller"
+ depends on USB_EHCI_HCD && PLAT_ORION
+ default y
+ ---help---
+ Enables support for the on-chip EHCI controller on
+ Morvell Orion chips.

config USB_EHCI_MSM
bool "Support for MSM on-chip EHCI USB controller"
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index c97f4ab..23b07dd 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -29,6 +29,7 @@ obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o
obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o
obj-$(CONFIG_USB_EHCI_HCD_OMAP) += ehci-omap.o
obj-$(CONFIG_USB_EHCI_HCD_SPEAR)+= ehci-spear.o
+obj-$(CONFIG_USB_EHCI_HCD_ORION)+= ehci-orion.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 68cea63..5a19a57 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -155,7 +155,7 @@ static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci)
* 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 ehci_hcd *ehci, void __iomem *ptr,
+int handshake(struct ehci_hcd *ehci, void __iomem *ptr,
u32 mask, u32 done, int usec)
{
u32 result;
@@ -172,9 +172,9 @@ static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
} while (usec > 0);
return -ETIMEDOUT;
}
-
+EXPORT_SYMBOL_GPL(handshake);
/* check TDI/ARC silicon is in host mode */
-static int tdi_in_host_mode (struct ehci_hcd *ehci)
+static int tdi_in_host_mode(struct ehci_hcd *ehci)
{
u32 tmp;

@@ -186,7 +186,7 @@ static int tdi_in_host_mode (struct ehci_hcd *ehci)
* 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 ehci_halt (struct ehci_hcd *ehci)
+int ehci_halt(struct ehci_hcd *ehci)
{
u32 temp;

@@ -215,9 +215,9 @@ static int ehci_halt (struct ehci_hcd *ehci)
return handshake(ehci, &ehci->regs->status,
STS_HALT, STS_HALT, 16 * 125);
}
-
+EXPORT_SYMBOL_GPL(ehci_halt);
/* put TDI/ARC silicon into EHCI mode */
-static void tdi_reset (struct ehci_hcd *ehci)
+void tdi_reset(struct ehci_hcd *ehci)
{
u32 tmp;

@@ -231,12 +231,12 @@ static void tdi_reset (struct ehci_hcd *ehci)
tmp |= USBMODE_BE;
ehci_writel(ehci, tmp, &ehci->regs->usbmode);
}
-
+EXPORT_SYMBOL_GPL(tdi_reset);
/*
* Reset a non-running (STS_HALT == 1) controller.
* Must be called with interrupts enabled and the lock not held.
*/
-static int ehci_reset (struct ehci_hcd *ehci)
+int ehci_reset(struct ehci_hcd *ehci)
{
int retval;
u32 command = ehci_readl(ehci, &ehci->regs->command);
@@ -272,7 +272,7 @@ static int ehci_reset (struct ehci_hcd *ehci)
ehci->resuming_ports = 0;
return retval;
}
-
+EXPORT_SYMBOL_GPL(ehci_reset);
/*
* Idle the controller (turn off the schedules).
* Must be called with interrupts enabled and the lock not held.
@@ -352,7 +352,7 @@ static void ehci_silence_controller(struct ehci_hcd *ehci)
* This forcibly disables dma and IRQs, helping kexec and other cases
* where the next system software may expect clean state.
*/
-static void ehci_shutdown(struct usb_hcd *hcd)
+void ehci_shutdown(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);

@@ -366,7 +366,7 @@ static void ehci_shutdown(struct usb_hcd *hcd)

hrtimer_cancel(&ehci->hrtimer);
}
-
+EXPORT_SYMBOL_GPL(ehci_shutdown);
/*-------------------------------------------------------------------------*/

/*
@@ -1267,11 +1267,6 @@ MODULE_LICENSE ("GPL");
#define XILINX_OF_PLATFORM_DRIVER ehci_hcd_xilinx_of_driver
#endif

-#ifdef CONFIG_PLAT_ORION
-#include "ehci-orion.c"
-#define PLATFORM_DRIVER ehci_orion_driver
-#endif
-
#ifdef CONFIG_USB_W90X900_EHCI
#include "ehci-w90x900.c"
#define PLATFORM_DRIVER ehci_hcd_w90x900_driver
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 914a3ec..de4dde2 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -8,6 +8,17 @@
* warranty of any kind, whether express or implied.
*/

+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/io.h>
+
+#include <linux/slab.h>
+#include <linux/usb/ulpi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/gpio.h>
+
+
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@@ -17,6 +28,9 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
+#include <linux/dma-mapping.h>
+#include "ehci.h"
+

#define rdl(off) __raw_readl(hcd->regs + (off))
#define wrl(off, val) __raw_writel((val), hcd->regs + (off))
@@ -34,6 +48,17 @@
#define USB_PHY_IVREF_CTRL 0x440
#define USB_PHY_TST_GRP_CTRL 0x450

+#define DRIVER_DESC "EHCI orion driver"
+
+static const char hcd_name[] = "ehci-orion";
+
+static struct hc_driver __read_mostly ehci_orion_hc_driver;
+
+static const struct ehci_driver_overrides orion_overrides __initdata = {
+ .reset = ehci_setup,
+};
+
+
/*
* Implement Orion USB controller specification guidelines
*/
@@ -104,51 +129,6 @@ static void orion_usb_phy_v1_setup(struct usb_hcd *hcd)
wrl(USB_MODE, 0x13);
}

-static const struct hc_driver ehci_orion_hc_driver = {
- .description = hcd_name,
- .product_desc = "Marvell Orion EHCI",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- /*
- * basic lifecycle operations
- */
- .reset = ehci_setup,
- .start = ehci_run,
- .stop = ehci_stop,
- .shutdown = ehci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = ehci_urb_enqueue,
- .urb_dequeue = ehci_urb_dequeue,
- .endpoint_disable = ehci_endpoint_disable,
- .endpoint_reset = ehci_endpoint_reset,
-
- /*
- * scheduling support
- */
- .get_frame_number = ehci_get_frame,
-
- /*
- * root hub support
- */
- .hub_status_data = ehci_hub_status_data,
- .hub_control = ehci_hub_control,
- .bus_suspend = ehci_bus_suspend,
- .bus_resume = ehci_bus_resume,
- .relinquish_port = ehci_relinquish_port,
- .port_handed_over = ehci_port_handed_over,
-
- .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-};
-
static void
ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
const struct mbus_dram_target_info *dram)
@@ -323,8 +303,6 @@ static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
return 0;
}

-MODULE_ALIAS("platform:orion-ehci");
-
static const struct of_device_id ehci_orion_dt_ids[] = {
{ .compatible = "marvell,orion-ehci", },
{},
@@ -336,8 +314,32 @@ static struct platform_driver ehci_orion_driver = {
.remove = __exit_p(ehci_orion_drv_remove),
.shutdown = usb_hcd_platform_shutdown,
.driver = {
- .name = "orion-ehci",
+ .name = hcd_name,
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(ehci_orion_dt_ids),
},
};
+
+static int __init ehci_orion_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+ ehci_init_driver(&ehci_orion_hc_driver, &orion_overrides);
+ return platform_driver_register(&ehci_orion_driver);
+}
+module_init(ehci_orion_init);
+
+static void __exit ehci_orion_cleanup(void)
+{
+ platform_driver_unregister(&ehci_orion_driver);
+}
+module_exit(ehci_orion_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_ALIAS("platform:ehci-orion");
+MODULE_AUTHOR("Tzachi Perelstein");
+MODULE_LICENSE("GPL");
+
--
1.7.9.5