191 lines
4.3 KiB
C
191 lines
4.3 KiB
C
/*
|
|
* EHCI 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 EHCI controller
|
|
*
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/delay.h>
|
|
|
|
extern int usb_disabled(void);
|
|
|
|
static void ar71xx_start_ehci(struct platform_device *pdev)
|
|
{
|
|
}
|
|
|
|
static void ar71xx_stop_ehci(struct platform_device *pdev)
|
|
{
|
|
/*
|
|
* TODO: implement
|
|
*/
|
|
}
|
|
|
|
int usb_ehci_ar71xx_probe(const struct hc_driver *driver,
|
|
struct usb_hcd **hcd_out,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
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_ehci(pdev);
|
|
|
|
ehci = hcd_to_ehci(hcd);
|
|
ehci->caps = hcd->regs;
|
|
ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
|
|
ehci->hcs_params = readl(&ehci->caps->hcs_params);
|
|
|
|
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
|
|
if (ret)
|
|
goto err_stop_ehc;
|
|
|
|
return 0;
|
|
|
|
err_stop_ehc:
|
|
ar71xx_stop_ehci(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_ehci_ar71xx_remove - shutdown processing for AR71xx-based 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.
|
|
*
|
|
*/
|
|
static void usb_ehci_ar71xx_remove(struct usb_hcd *hcd,
|
|
struct platform_device *pdev)
|
|
{
|
|
usb_remove_hcd(hcd);
|
|
ar71xx_stop_ehci(pdev);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
}
|
|
|
|
static const struct hc_driver ehci_ar71xx_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "Atheros AR71xx built-in EHCI controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ehci_init,
|
|
.start = ehci_run,
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ehci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = ehci_hub_control,
|
|
#ifdef CONFIG_PM
|
|
.hub_suspend = ehci_hub_suspend,
|
|
.hub_resume = ehci_hub_resume,
|
|
#endif
|
|
};
|
|
|
|
static int ehci_hcd_ar71xx_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = NULL;
|
|
int ret;
|
|
|
|
ret = -ENODEV;
|
|
if (!usb_disabled())
|
|
ret = usb_ehci_ar71xx_probe(&ehci_ar71xx_hc_driver, &hcd, pdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ehci_hcd_ar71xx_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_ehci_ar71xx_remove(hcd, pdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ehci_hcd_ar71xx_driver = {
|
|
.probe = ehci_hcd_ar71xx_drv_probe,
|
|
.remove = ehci_hcd_ar71xx_drv_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
.driver = {
|
|
.name = "ar71xx-ehci",
|
|
.bus = &platform_bus_type
|
|
}
|
|
};
|
|
|
|
MODULE_ALIAS("ar71xx-ehci");
|