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USB: OHCI: make ohci-platform a separate driver 

This patch splits the ohci-platform code from ohci-hcd out
into its own separate driver module.This work is part of enabling
multi-platform kernels on ARM.

In V2:
  -Passed "hcd" argument instead of "ohci" in ohci_setup() because it is
   using "struct usb_hcd" argument.
In V3:
  -Directly passed "hcd" argument not required to call ohci_to_hcd() function.

Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Manjunath Goudar 2013-06-03 20:46:08 +05:30 committed by Greg Kroah-Hartman
parent 2373536537
commit 928fb68e23
4 changed files with 44 additions and 53 deletions
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2
drivers/usb/host/Kconfig
View File

@ -481,7 +481,7 @@ config USB_CNS3XXX_OHCI
It is needed for low-speed USB 1.0 device support.
config USB_OHCI_HCD_PLATFORM
bool "Generic OHCI driver for a platform device"
tristate "Generic OHCI driver for a platform device"
default n
---help---
Adds an OHCI host driver for a generic platform device, which

1
drivers/usb/host/Makefile
View File

@ -40,6 +40,7 @@ obj-$(CONFIG_USB_ISP1362_HCD) += isp1362-hcd.o
obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o

6
drivers/usb/host/ohci-hcd.c
View File

@ -1262,12 +1262,8 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ohci_hcd_tilegx_driver
#endif
#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
#include "ohci-platform.c"
#define PLATFORM_DRIVER ohci_platform_driver
#endif
#if !IS_ENABLED(CONFIG_USB_OHCI_HCD_PCI) && \
!IS_ENABLED(CONFIG_USB_OHCI_HCD_PLATFORM) && \
!defined(PLATFORM_DRIVER) && \
!defined(OMAP1_PLATFORM_DRIVER) && \
!defined(OMAP3_PLATFORM_DRIVER) && \

88
drivers/usb/host/ohci-platform.c
View File

@ -13,16 +13,28 @@
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/hrtimer.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/usb/ohci_pdriver.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI generic platform driver"
static const char hcd_name[] = "ohci-platform";
static int ohci_platform_reset(struct usb_hcd *hcd)
{
struct platform_device *pdev = to_platform_device(hcd->self.controller);
struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int err;
if (pdata->big_endian_desc)
ohci->flags |= OHCI_QUIRK_BE_DESC;
@ -30,58 +42,17 @@ static int ohci_platform_reset(struct usb_hcd *hcd)
ohci->flags |= OHCI_QUIRK_BE_MMIO;
if (pdata->no_big_frame_no)
ohci->flags |= OHCI_QUIRK_FRAME_NO;
ohci_hcd_init(ohci);
if (pdata->num_ports)
ohci->num_ports = pdata->num_ports;
err = ohci_init(ohci);
return err;
return ohci_setup(hcd);
}
static int ohci_platform_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int err;
static struct hc_driver __read_mostly ohci_platform_hc_driver;
err = ohci_run(ohci);
if (err < 0) {
ohci_err(ohci, "can't start\n");
ohci_stop(hcd);
}
return err;
}
static const struct hc_driver ohci_platform_hc_driver = {
.description = hcd_name,
.product_desc = "Generic Platform OHCI Controller",
.hcd_priv_size = sizeof(struct ohci_hcd),
.irq = ohci_irq,
.flags = HCD_MEMORY | HCD_USB11,
.reset = ohci_platform_reset,
.start = ohci_platform_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
.get_frame_number = ohci_get_frame,
.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 struct ohci_driver_overrides platform_overrides __initconst = {
.product_desc = "Generic Platform OHCI controller",
.reset = ohci_platform_reset,
};
static int ohci_platform_probe(struct platform_device *dev)
@ -222,3 +193,26 @@ static struct platform_driver ohci_platform_driver = {
.pm = &ohci_platform_pm_ops,
}
};
static int __init ohci_platform_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
return platform_driver_register(&ohci_platform_driver);
}
module_init(ohci_platform_init);
static void __exit ohci_platform_cleanup(void)
{
platform_driver_unregister(&ohci_platform_driver);
}
module_exit(ohci_platform_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Hauke Mehrtens");
MODULE_AUTHOR("Alan Stern");
MODULE_LICENSE("GPL");