satip-axe/kernel/drivers/usb/host/ohci-stcore.c
2015-03-26 17:24:57 +01:00

205 lines
4.5 KiB
C

/*
* OHCI HCD (Host Controller Driver) for USB
*
* (C) copyright STMicroelectronics 2005
* Author: Mark Glaisher <mark.glaisher@st.com>
*
* STMicroelectronics on-chip USB host controller Bus Glue.
* Based on the StrongArm ohci-sa1111.c file
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*/
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include "./hcd-stm.h"
#undef dgb_print
#ifdef CONFIG_USB_DEBUG
#define dgb_print(fmt, args...) \
pr_debug("%s: " fmt, __func__ , ## args)
#else
#define dgb_print(fmt, args...)
#endif
static int
stm_ohci_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret = 0;
dgb_print("\n");
if ((ret = ohci_init(ohci)) < 0)
return ret;
if ((ret = ohci_run(ohci)) < 0) {
err("can't start %s", hcd->self.bus_name);
ohci_stop(hcd);
return ret;
}
return 0;
}
#ifdef CONFIG_PM
static int stm_ohci_bus_suspend(struct usb_hcd *hcd)
{
dgb_print("\n");
ohci_bus_suspend(hcd);
usb_root_hub_lost_power(hcd->self.root_hub);
return 0;
}
#endif
static const struct hc_driver ohci_st40_hc_driver = {
.description = hcd_name,
.product_desc = "stm-ohci",
.hcd_priv_size = sizeof(struct ohci_hcd),
/* generic hardware linkage */
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/* basic lifecycle operations */
.start = stm_ohci_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 = stm_ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
static int ohci_hcd_stm_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd = NULL;
int retval;
struct resource *res;
struct platform_device *stm_usb_pdev;
dgb_print("\n");
hcd = usb_create_hcd(&ohci_st40_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd) {
pr_debug("hcd_create_hcd failed");
retval = -ENOMEM;
goto err0;
}
stm_usb_pdev = to_platform_device(pdev->dev.parent);
res = platform_get_resource_byname(stm_usb_pdev,
IORESOURCE_MEM, "ohci");
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
pr_debug("request_mem_region failed");
retval = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
pr_debug("ioremap failed");
retval = -ENOMEM;
goto err2;
}
ohci_hcd_init(hcd_to_ohci(hcd));
res = platform_get_resource_byname(stm_usb_pdev,
IORESOURCE_IRQ, "ohci");
retval = usb_add_hcd(hcd, res->start, 0);
if (retval == 0) {
#ifdef CONFIG_PM
hcd->self.root_hub->do_remote_wakeup = 0;
hcd->self.root_hub->persist_enabled = 0;
hcd->self.root_hub->autosuspend_disabled = 1;
hcd->self.root_hub->autoresume_disabled = 1;
#endif
return retval;
}
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
err0:
return retval;
}
static int ohci_hcd_stm_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
return 0;
}
static struct platform_driver ohci_hcd_stm_driver = {
.probe = ohci_hcd_stm_probe,
.remove = ohci_hcd_stm_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "stm-ohci",
},
};
#ifdef CONFIG_PM
static DEFINE_MUTEX(stm_ohci_usb_mutex); /* to serialize the operations.. */
int stm_ohci_hcd_unregister(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
int ret = 0;
if (!hcd)
return ret;
mutex_lock(&stm_ohci_usb_mutex);
ret = ohci_hcd_stm_remove(dev);
mutex_unlock(&stm_ohci_usb_mutex);
if (ret)
dgb_print("[STM][USB] Error on %s 0x%x\n", __func__, dev);
return ret;
}
EXPORT_SYMBOL(stm_ohci_hcd_unregister);
int stm_ohci_hcd_register(struct platform_device *dev)
{
int ret = 0;
mutex_lock(&stm_ohci_usb_mutex);
ret = ohci_hcd_stm_probe(dev);
mutex_unlock(&stm_ohci_usb_mutex);
if (ret)
dgb_print("[STM][USB] Error on %s 0x%x\n", __func__, dev);
return ret;
}
EXPORT_SYMBOL(stm_ohci_hcd_register);
#endif