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USB: OHCI: make ohci-omap3 a separate driver 

Separate the  TI OHCI OMAP3 host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Manjunath Goudar 2013-09-21 16:38:40 +05:30 committed by Greg Kroah-Hartman
parent de57a1547a
commit 3a48fef18d
4 changed files with 40 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/host/Kconfig
View File

@ -374,7 +374,7 @@ config USB_OHCI_HCD_OMAP1
Enables support for the OHCI controller on OMAP1/2 chips.
config USB_OHCI_HCD_OMAP3
bool "OHCI support for OMAP3 and later chips"
tristate "OHCI support for OMAP3 and later chips"
depends on (ARCH_OMAP3 || ARCH_OMAP4)
default y
---help---

1
drivers/usb/host/Makefile
View File

@ -49,6 +49,7 @@ obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
obj-$(CONFIG_USB_OHCI_HCD_OMAP3) += ohci-omap3.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o

18
drivers/usb/host/ohci-hcd.c
View File

@ -1182,11 +1182,6 @@ MODULE_LICENSE ("GPL");
#define S3C2410_PLATFORM_DRIVER ohci_hcd_s3c2410_driver
#endif
#ifdef CONFIG_USB_OHCI_HCD_OMAP3
#include "ohci-omap3.c"
#define OMAP3_PLATFORM_DRIVER ohci_hcd_omap3_driver
#endif
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
#include "ohci-pxa27x.c"
#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
@ -1284,12 +1279,6 @@ static int __init ohci_hcd_mod_init(void)
goto error_platform;
#endif
#ifdef OMAP3_PLATFORM_DRIVER
retval = platform_driver_register(&OMAP3_PLATFORM_DRIVER);
if (retval < 0)
goto error_omap3_platform;
#endif
#ifdef OF_PLATFORM_DRIVER
retval = platform_driver_register(&OF_PLATFORM_DRIVER);
if (retval < 0)
@ -1393,10 +1382,6 @@ static int __init ohci_hcd_mod_init(void)
platform_driver_unregister(&OF_PLATFORM_DRIVER);
error_of_platform:
#endif
#ifdef OMAP3_PLATFORM_DRIVER
platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
error_omap3_platform:
#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
@ -1448,9 +1433,6 @@ static void __exit ohci_hcd_mod_exit(void)
#ifdef OF_PLATFORM_DRIVER
platform_driver_unregister(&OF_PLATFORM_DRIVER);
#endif
#ifdef OMAP3_PLATFORM_DRIVER
platform_driver_unregister(&OMAP3_PLATFORM_DRIVER);
#endif
#ifdef PLATFORM_DRIVER
platform_driver_unregister(&PLATFORM_DRIVER);
#endif

118
drivers/usb/host/ohci-omap3.c
View File

@ -29,90 +29,22 @@
* - add kernel-doc
*/
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/usb/otg.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/dma-mapping.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
/*-------------------------------------------------------------------------*/
#include "ohci.h"
static int ohci_omap3_init(struct usb_hcd *hcd)
{
dev_dbg(hcd->self.controller, "starting OHCI controller\n");
#define DRIVER_DESC "OHCI OMAP3 driver"
return ohci_init(hcd_to_ohci(hcd));
}
/*-------------------------------------------------------------------------*/
static int ohci_omap3_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
/*
* RemoteWakeupConnected has to be set explicitly before
* calling ohci_run. The reset value of RWC is 0.
*/
ohci->hc_control = OHCI_CTRL_RWC;
writel(OHCI_CTRL_RWC, &ohci->regs->control);
ret = ohci_run(ohci);
if (ret < 0) {
dev_err(hcd->self.controller, "can't start\n");
ohci_stop(hcd);
}
return ret;
}
/*-------------------------------------------------------------------------*/
static const struct hc_driver ohci_omap3_hc_driver = {
.description = hcd_name,
.product_desc = "OMAP3 OHCI Host Controller",
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.reset = ohci_omap3_init,
.start = ohci_omap3_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
/*-------------------------------------------------------------------------*/
static const char hcd_name[] = "ohci-omap3";
static struct hc_driver __read_mostly ohci_omap3_hc_driver;
/*
* configure so an HC device and id are always provided
@ -129,6 +61,7 @@ static const struct hc_driver ohci_omap3_hc_driver = {
static int ohci_hcd_omap3_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ohci_hcd *ohci;
struct usb_hcd *hcd = NULL;
void __iomem *regs = NULL;
struct resource *res;
@ -185,7 +118,12 @@ static int ohci_hcd_omap3_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
ohci_hcd_init(hcd_to_ohci(hcd));
ohci = hcd_to_ohci(hcd);
/*
* RemoteWakeupConnected has to be set explicitly before
* calling ohci_run. The reset value of RWC is 0.
*/
ohci->hc_control = OHCI_CTRL_RWC;
ret = usb_add_hcd(hcd, irq, 0);
if (ret) {
@ -248,5 +186,25 @@ static struct platform_driver ohci_hcd_omap3_driver = {
},
};
static int __init ohci_omap3_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_omap3_hc_driver, NULL);
return platform_driver_register(&ohci_hcd_omap3_driver);
}
module_init(ohci_omap3_init);
static void __exit ohci_omap3_cleanup(void)
{
platform_driver_unregister(&ohci_hcd_omap3_driver);
}
module_exit(ohci_omap3_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_ALIAS("platform:ohci-omap3");
MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>");
MODULE_LICENSE("GPL");