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/*
* 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");
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