mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 05:49:42 +02:00
201 lines
4.2 KiB
C
201 lines
4.2 KiB
C
|
/*
|
||
|
* OHCI HCD (Host Controller Driver) for USB.
|
||
|
*
|
||
|
* Copyright (C) 2007 Atheros Communications, Inc.
|
||
|
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
|
||
|
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
||
|
*
|
||
|
* Bus Glue for Atheros AR71xx built-in OHCI controller
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#include <linux/platform_device.h>
|
||
|
#include <linux/delay.h>
|
||
|
|
||
|
extern int usb_disabled(void);
|
||
|
|
||
|
static void ar71xx_start_ohci(struct platform_device *pdev)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static void ar71xx_stop_ohci(struct platform_device *pdev)
|
||
|
{
|
||
|
/*
|
||
|
* TODO: implement
|
||
|
*/
|
||
|
}
|
||
|
|
||
|
int usb_hcd_ar71xx_probe(const struct hc_driver *driver,
|
||
|
struct platform_device *pdev)
|
||
|
{
|
||
|
struct usb_hcd *hcd;
|
||
|
struct resource *res;
|
||
|
int irq;
|
||
|
int ret;
|
||
|
|
||
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
||
|
if (!res) {
|
||
|
dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
|
||
|
pdev->dev.bus_id);
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
irq = res->start;
|
||
|
|
||
|
hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
|
||
|
if (!hcd)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
if (!res) {
|
||
|
dev_dbg(&pdev->dev, "no base address specified for %s\n",
|
||
|
pdev->dev.bus_id);
|
||
|
ret = -ENODEV;
|
||
|
goto err_put_hcd;
|
||
|
}
|
||
|
hcd->rsrc_start = res->start;
|
||
|
hcd->rsrc_len = res->end - res->start + 1;
|
||
|
|
||
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
||
|
dev_dbg(&pdev->dev, "controller already in use\n");
|
||
|
ret = -EBUSY;
|
||
|
goto err_put_hcd;
|
||
|
}
|
||
|
|
||
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
||
|
if (!hcd->regs) {
|
||
|
dev_dbg(&pdev->dev, "error mapping memory\n");
|
||
|
ret = -EFAULT;
|
||
|
goto err_release_region;
|
||
|
}
|
||
|
|
||
|
ar71xx_start_ohci(pdev);
|
||
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
||
|
|
||
|
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
|
||
|
if (ret)
|
||
|
goto err_stop_hcd;
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
err_stop_hcd:
|
||
|
ar71xx_stop_ohci(pdev);
|
||
|
iounmap(hcd->regs);
|
||
|
err_release_region:
|
||
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||
|
err_put_hcd:
|
||
|
usb_put_hcd(hcd);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
|
||
|
/* may be called without controller electrically present */
|
||
|
/* may be called with controller, bus, and devices active */
|
||
|
|
||
|
/**
|
||
|
* usb_hcd_ar71xx_remove - shutdown processing for AR71xx HCDs
|
||
|
* @dev: USB Host Controller being removed
|
||
|
* Context: !in_interrupt()
|
||
|
*
|
||
|
* Reverses the effect of usb_hcd_ar71xx_probe(), first invoking
|
||
|
* the HCD's stop() method. It is always called from a thread
|
||
|
* context, normally "rmmod", "apmd", or something similar.
|
||
|
*
|
||
|
*/
|
||
|
void usb_hcd_ar71xx_remove(struct usb_hcd *hcd, struct platform_device *pdev)
|
||
|
{
|
||
|
usb_remove_hcd(hcd);
|
||
|
ar71xx_stop_ohci(pdev);
|
||
|
iounmap(hcd->regs);
|
||
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||
|
usb_put_hcd(hcd);
|
||
|
}
|
||
|
|
||
|
static int __devinit ohci_ar71xx_start(struct usb_hcd *hcd)
|
||
|
{
|
||
|
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
||
|
int ret;
|
||
|
|
||
|
ret = ohci_init(ohci);
|
||
|
if (ret < 0)
|
||
|
return ret;
|
||
|
|
||
|
ret = ohci_run(ohci);
|
||
|
if (ret < 0)
|
||
|
goto err;
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
err:
|
||
|
ohci_stop(hcd);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static const struct hc_driver ohci_ar71xx_hc_driver = {
|
||
|
.description = hcd_name,
|
||
|
.product_desc = "Atheros AR71xx built-in OHCI controller",
|
||
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
||
|
|
||
|
/*
|
||
|
* generic hardware linkage
|
||
|
*/
|
||
|
.irq = ohci_irq,
|
||
|
.flags = HCD_USB11 | HCD_MEMORY,
|
||
|
|
||
|
/*
|
||
|
* basic lifecycle operations
|
||
|
*/
|
||
|
.start = ohci_ar71xx_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,
|
||
|
.start_port_reset = ohci_start_port_reset,
|
||
|
};
|
||
|
|
||
|
static int ohci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
|
||
|
{
|
||
|
int ret;
|
||
|
|
||
|
ret = -ENODEV;
|
||
|
if (!usb_disabled())
|
||
|
ret = usb_hcd_ar71xx_probe(&ohci_ar71xx_hc_driver, pdev);
|
||
|
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int ohci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
|
||
|
{
|
||
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||
|
|
||
|
usb_hcd_ar71xx_remove(hcd, pdev);
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static struct platform_driver ohci_hcd_ar71xx_driver = {
|
||
|
.probe = ohci_hcd_ar71xx_drv_probe,
|
||
|
.remove = ohci_hcd_ar71xx_drv_remove,
|
||
|
.shutdown = usb_hcd_platform_shutdown,
|
||
|
.driver = {
|
||
|
.name = "ar71xx-ohci",
|
||
|
.owner = THIS_MODULE,
|
||
|
},
|
||
|
};
|
||
|
|
||
|
MODULE_ALIAS("ar71xx-ohci");
|