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/*
* linux/driver/usb/host/ehci-w90x900.c
*
* Copyright (c) 2008 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#include <linux/platform_device.h>
/* enable phy0 and phy1 for w90p910 */
#define ENPHY (0x01<<8)
#define PHY0_CTR (0xA4)
#define PHY1_CTR (0xA8)
static int usb_w90x900_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
int retval = 0, irq;
unsigned long val;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
retval = -ENXIO;
goto err1;
}
hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
if (!hcd) {
retval = -ENOMEM;
goto err1;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
retval = -EBUSY;
goto err2;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (hcd->regs == NULL) {
retval = -EFAULT;
goto err3;
}
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
/* enable PHY 0,1,the regs only apply to w90p910
* 0xA4,0xA8 were offsets of PHY0 and PHY1 controller of
* w90p910 IC relative to ehci->regs.
*/
val = __raw_readl(ehci->regs+PHY0_CTR);
val |= ENPHY;
__raw_writel(val, ehci->regs+PHY0_CTR);
val = __raw_readl(ehci->regs+PHY1_CTR);
val |= ENPHY;
__raw_writel(val, ehci->regs+PHY1_CTR);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
goto err4;
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval != 0)
goto err4;
return retval;
err4:
iounmap(hcd->regs);
err3:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err2:
usb_put_hcd(hcd);
err1:
return retval;
}
static
void usb_w90x900_remove(struct usb_hcd *hcd, struct platform_device *pdev)
{
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static const struct hc_driver ehci_w90x900_hc_driver = {
.description = hcd_name,
.product_desc = "Nuvoton w90x900 EHCI Host Controller",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_USB2|HCD_MEMORY|HCD_BH,
/*
* basic lifecycle operations
*/
.reset = ehci_setup,
.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,
.endpoint_reset = ehci_endpoint_reset,
/*
* 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
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
#endif
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static int ehci_w90x900_probe(struct platform_device *pdev)
{
if (usb_disabled())
return -ENODEV;
return usb_w90x900_probe(&ehci_w90x900_hc_driver, pdev);
}
static int ehci_w90x900_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_w90x900_remove(hcd, pdev);
return 0;
}
static struct platform_driver ehci_hcd_w90x900_driver = {
.probe = ehci_w90x900_probe,
.remove = ehci_w90x900_remove,
.driver = {
.name = "w90x900-ehci",
.owner = THIS_MODULE,
},
};
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
MODULE_DESCRIPTION("w90p910 usb ehci driver!");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:w90p910-ehci");
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