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/*
* OHCI HCD (Host Controller Driver) for USB.
*
* Bus Glue for Realtek rtl819x built-in OHCI controller.
*
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
*
* Parts of this file are based on Realtek' 2.6.30 BSP
* Copyright (C) 2013 Realtek Semiconductor, Corp.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/platform_device.h>
#include <linux/delay.h>
extern int usb_disabled(void);
static int usb_hcd_rtl819x_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
struct ohci_hcd *ohci;
int irq;
int ret;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
dev_name(&pdev->dev));
return -ENODEV;
}
irq = res->start;
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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",
dev_name(&pdev->dev));
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;
}
ohci = hcd_to_ohci(hcd);
ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
ohci_hcd_init(ohci);
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto err_stop_hcd;
return 0;
err_stop_hcd:
iounmap(hcd->regs);
err_release_region:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
void usb_hcd_rtl819x_remove(struct usb_hcd *hcd, struct platform_device *pdev)
{
usb_remove_hcd(hcd);
//rtl8652_stop_hc(&pdev->dev);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static int __devinit ohci_rtl819x_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
unsigned int fminterval;
ret = ohci_init(ohci);
if (ret < 0)
return ret;
#if 1
fminterval = 0x2edf;
ohci_writel (ohci,(fminterval * 9) / 10, &ohci->regs->periodicstart);
fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
ohci_writel (ohci, fminterval, &ohci->regs->fminterval);
ohci_writel (ohci, 0x0628, &ohci->regs->lsthresh); /* default value from datasheet */
ohci_writel (ohci, 0x3e67, &ohci->regs->periodicstart); /* default value from datasheet */
#endif
ret = ohci_run(ohci);
if (ret < 0)
goto err;
return 0;
err:
ohci_stop(hcd);
return ret;
}
static const struct hc_driver ohci_rtl819x_hc_driver = {
.description = hcd_name,
.product_desc = "Realtek rtl819x built-in OHCI controller",
.hcd_priv_size = sizeof(struct ohci_hcd),
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
.start = ohci_rtl819x_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
.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,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
static int ohci_hcd_rtl819x_drv_probe(struct platform_device *pdev)
{
if (usb_disabled())
return -ENODEV;
return usb_hcd_rtl819x_probe(&ohci_rtl819x_hc_driver, pdev);
}
static int ohci_hcd_rtl819x_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_hcd_rtl819x_remove(hcd, pdev);
return 0;
}
#ifdef CONFIG_PM
static int ohci_hcd_rtl8652_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
//rtl8652_stop_hc(&pdev->dev);
hcd->state = HC_STATE_SUSPENDED;
pdev->dev.power.power_state = PMSG_SUSPEND;
return 0;
}
static int ohci_hcd_rtl8652_drv_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int status;
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
//rtl8652_start_hc(&pdev->dev);
pdev->dev.power.power_state = PMSG_ON;
usb_hcd_resume_root_hub(hcd);
return 0;
}
#endif
MODULE_ALIAS("platform:rtl819x-ohci");
static struct platform_driver ohci_hcd_rtl819x_driver = {
.probe = ohci_hcd_rtl819x_drv_probe,
.remove = ohci_hcd_rtl819x_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
.suspend = ohci_hcd_rtl8652_drv_suspend,
.resume = ohci_hcd_rtl8652_drv_resume,
#endif
.driver = {
.name = "rtl819x-ohci",
.owner = THIS_MODULE,
},
};
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