korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-16 07:24:39 +08:00
Code Issues Packages Projects Releases Wiki Activity

USB: OHCI: make ohci-spear a separate driver

Browse Source 
Separate the ST OHCI SPEAr 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: Viresh Kumar <viresh.linux@gmail.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 16:38:41 +05:30 committed by Greg Kroah-Hartman
parent 3a48fef18d
commit 1cc6ac59ff
4 changed files with 65 additions and 102 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/host/Kconfig
View File

@ -373,6 +373,14 @@ config USB_OHCI_HCD_OMAP1
---help---
Enables support for the OHCI controller on OMAP1/2 chips.
config USB_OHCI_HCD_SPEAR
tristate "Support for ST SPEAr on-chip OHCI USB controller"
depends on USB_OHCI_HCD && PLAT_SPEAR
default y
---help---
Enables support for the on-chip OHCI controller on
ST SPEAr chips.
config USB_OHCI_HCD_OMAP3
tristate "OHCI support for OMAP3 and later chips"
depends on (ARCH_OMAP3 || ARCH_OMAP4)

1
drivers/usb/host/Makefile
View File

@ -50,6 +50,7 @@ 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-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o

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

@ -1212,11 +1212,6 @@ MODULE_LICENSE ("GPL");
#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
#endif
#ifdef CONFIG_PLAT_SPEAR
#include "ohci-spear.c"
#define SPEAR_PLATFORM_DRIVER spear_ohci_hcd_driver
#endif
#ifdef CONFIG_PPC_PS3
#include "ohci-ps3.c"
#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
@ -1333,19 +1328,9 @@ static int __init ohci_hcd_mod_init(void)
goto error_davinci;
#endif
#ifdef SPEAR_PLATFORM_DRIVER
retval = platform_driver_register(&SPEAR_PLATFORM_DRIVER);
if (retval < 0)
goto error_spear;
#endif
return retval;
/* Error path */
#ifdef SPEAR_PLATFORM_DRIVER
platform_driver_unregister(&SPEAR_PLATFORM_DRIVER);
error_spear:
#endif
#ifdef DAVINCI_PLATFORM_DRIVER
platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER);
error_davinci:
@ -1403,9 +1388,6 @@ module_init(ohci_hcd_mod_init);
static void __exit ohci_hcd_mod_exit(void)
{
#ifdef SPEAR_PLATFORM_DRIVER
platform_driver_unregister(&SPEAR_PLATFORM_DRIVER);
#endif
#ifdef DAVINCI_PLATFORM_DRIVER
platform_driver_unregister(&DAVINCI_PLATFORM_DRIVER);
#endif

140
drivers/usb/host/ohci-spear.c
View File

@ -11,92 +11,37 @@
* warranty of any kind, whether express or implied.
*/
#include <linux/signal.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI SPEAr driver"
static const char hcd_name[] = "SPEAr-ohci";
struct spear_ohci {
struct ohci_hcd ohci;
struct clk *clk;
};
#define to_spear_ohci(hcd) (struct spear_ohci *)hcd_to_ohci(hcd)
#define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
static void spear_start_ohci(struct spear_ohci *ohci)
{
clk_prepare_enable(ohci->clk);
}
static void spear_stop_ohci(struct spear_ohci *ohci)
{
clk_disable_unprepare(ohci->clk);
}
static int ohci_spear_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
ret = ohci_init(ohci);
if (ret < 0)
return ret;
ohci->regs = hcd->regs;
ret = ohci_run(ohci);
if (ret < 0) {
dev_err(hcd->self.controller, "can't start\n");
ohci_stop(hcd);
return ret;
}
create_debug_files(ohci);
#ifdef DEBUG
ohci_dump(ohci, 1);
#endif
return 0;
}
static const struct hc_driver ohci_spear_hc_driver = {
.description = hcd_name,
.product_desc = "SPEAr OHCI",
.hcd_priv_size = sizeof(struct spear_ohci),
/* generic hardware linkage */
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/* basic lifecycle operations */
.start = ohci_spear_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
/* 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,
.start_port_reset = ohci_start_port_reset,
};
static struct hc_driver __read_mostly ohci_spear_hc_driver;
static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
{
const struct hc_driver *driver = &ohci_spear_hc_driver;
struct ohci_hcd *ohci;
struct usb_hcd *hcd = NULL;
struct clk *usbh_clk;
struct spear_ohci *ohci_p;
struct spear_ohci *sohci_p;
struct resource *res;
int retval, irq;
@ -151,16 +96,18 @@ static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
goto err_put_hcd;
}
ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
ohci_p->clk = usbh_clk;
spear_start_ohci(ohci_p);
ohci_hcd_init(hcd_to_ohci(hcd));
sohci_p = to_spear_ohci(hcd);
sohci_p->clk = usbh_clk;
clk_prepare_enable(sohci_p->clk);
ohci = hcd_to_ohci(hcd);
retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
if (retval == 0)
return retval;
spear_stop_ohci(ohci_p);
clk_disable_unprepare(sohci_p->clk);
err_put_hcd:
usb_put_hcd(hcd);
fail:
@ -172,11 +119,11 @@ fail:
static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct spear_ohci *ohci_p = to_spear_ohci(hcd);
struct spear_ohci *sohci_p = to_spear_ohci(hcd);
usb_remove_hcd(hcd);
if (ohci_p->clk)
spear_stop_ohci(ohci_p);
if (sohci_p->clk)
clk_disable_unprepare(sohci_p->clk);
usb_put_hcd(hcd);
return 0;
@ -188,13 +135,14 @@ static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct spear_ohci *ohci_p = to_spear_ohci(hcd);
struct spear_ohci *sohci_p = to_spear_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
spear_stop_ohci(ohci_p);
clk_disable_unprepare(sohci_p->clk);
return 0;
}
@ -202,13 +150,13 @@ static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
struct spear_ohci *ohci_p = to_spear_ohci(hcd);
struct spear_ohci *sohci_p = to_spear_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
spear_start_ohci(ohci_p);
clk_prepare_enable(sohci_p->clk);
ohci_resume(hcd, false);
return 0;
}
@ -234,4 +182,28 @@ static struct platform_driver spear_ohci_hcd_driver = {
},
};
static const struct ohci_driver_overrides spear_overrides __initconst = {
.extra_priv_size = sizeof(struct spear_ohci),
};
static int __init ohci_spear_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides);
return platform_driver_register(&spear_ohci_hcd_driver);
}
module_init(ohci_spear_init);
static void __exit ohci_spear_cleanup(void)
{
platform_driver_unregister(&spear_ohci_hcd_driver);
}
module_exit(ohci_spear_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Deepak Sikri");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:spear-ohci");