149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
|
|
* 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/dma-mapping.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/hcd.h>
|
|
|
|
#include "ehci.h"
|
|
|
|
/* enable phy0 and phy1 for w90p910 */
|
|
#define ENPHY (0x01<<8)
|
|
#define PHY0_CTR (0xA4)
|
|
#define PHY1_CTR (0xA8)
|
|
|
|
#define DRIVER_DESC "EHCI w90x900 driver"
|
|
|
|
static const char hcd_name[] = "ehci-w90x900 ";
|
|
|
|
static struct hc_driver __read_mostly ehci_w90x900_hc_driver;
|
|
|
|
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;
|
|
|
|
hcd = usb_create_hcd(driver, &pdev->dev, "w90x900 EHCI");
|
|
if (!hcd) {
|
|
retval = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(hcd->regs)) {
|
|
retval = PTR_ERR(hcd->regs);
|
|
goto err2;
|
|
}
|
|
hcd->rsrc_start = res->start;
|
|
hcd->rsrc_len = resource_size(res);
|
|
|
|
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) {
|
|
retval = irq;
|
|
goto err2;
|
|
}
|
|
|
|
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
if (retval != 0)
|
|
goto err2;
|
|
|
|
device_wakeup_enable(hcd->self.controller);
|
|
return retval;
|
|
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);
|
|
usb_put_hcd(hcd);
|
|
}
|
|
|
|
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",
|
|
},
|
|
};
|
|
|
|
static int __init ehci_w90X900_init(void)
|
|
{
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
|
|
|
|
ehci_init_driver(&ehci_w90x900_hc_driver, NULL);
|
|
return platform_driver_register(&ehci_hcd_w90x900_driver);
|
|
}
|
|
module_init(ehci_w90X900_init);
|
|
|
|
static void __exit ehci_w90X900_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&ehci_hcd_w90x900_driver);
|
|
}
|
|
module_exit(ehci_w90X900_cleanup);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
|
|
MODULE_ALIAS("platform:w90p910-ehci");
|
|
MODULE_LICENSE("GPL v2");
|