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/*
* Bus Glue for Realtek rtl819x built-in EHCI controller.
*
* Copyright (C) 2008-2010 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);
/**
* usb_hcd_rtl819x_probe - initialize FSL-based HCDs
* @drvier: Driver to be used for this HCD
* @pdev: USB Host Controller being probed
* Context: !in_interrupt()
*
* Allocates basic resources for this USB host controller.
*
*/
static int ehci_rtl819x_probe(const struct hc_driver *driver,
struct usb_hcd **hcd_out,
struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int ret;
pr_debug("initializing RTL-SOC USB Controller\n");
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;
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));
return -ENODEV;
}
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd)
return -ENOMEM;
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;
}
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (ret)
goto err_iounmap;
return 0;
err_iounmap:
iounmap(hcd->regs);
err_release_region:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
/**
* usb_hcd_rtl819x_remove - shutdown processing for FSL-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_hcd_rtl8652_probe().
*
*/
static void usb_hcd_rtl819x_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 int synopsys_usb_setup(struct ehci_hcd *ehci)
{
#if 1 //tony: patch for synopsys
printk("read synopsys=%x\n",readl (&ehci->regs->command+0x84));
writel(0x01fd0020,&ehci->regs->command+0x84);
printk("read synopsys2=%x\n",readl (&ehci->regs->command+0x84));
#endif
return 0;
}
static int ehci_rtl819x_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int ret;
ehci->big_endian_desc = 1;
ehci->big_endian_mmio = 1;
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
ehci->sbrn = 0x20;
//ehci->has_synopsys_hc_bug = 1;
ehci_reset(ehci);
ret = ehci_init(hcd);
if (ret)
return ret;
ehci_port_power(ehci, 0);
return 0;
}
static const struct hc_driver ehci_rtl819x_hc_driver = {
.description = hcd_name,
.product_desc = "Realtek rtl819x On-Chip EHCI Host Controller",
.hcd_priv_size = sizeof(struct ehci_hcd),
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
//.flags = HCD_USB2,
.reset = ehci_rtl819x_setup,
.start = ehci_run,
.stop = ehci_stop,
.shutdown = ehci_shutdown,
.urb_enqueue = ehci_urb_enqueue,
.urb_dequeue = ehci_urb_dequeue,
.endpoint_disable = ehci_endpoint_disable,
.endpoint_reset = ehci_endpoint_reset,
.get_frame_number = ehci_get_frame,
.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
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static int ehci_rtl819x_driver_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd = NULL;
int ret;
if (usb_disabled())
return -ENODEV;
ret = ehci_rtl819x_probe(&ehci_rtl819x_hc_driver, &hcd, pdev);
//ret = usb_hcd_rtl8652_probe(&ehci_rtl819x_hc_driver, pdev);
return ret;
}
static int ehci_rtl819x_driver_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_hcd_rtl819x_remove(hcd, pdev);
return 0;
}
MODULE_ALIAS("platform:rtl819x-ehci");
static struct platform_driver ehci_rtl819x_driver = {
.probe = ehci_rtl819x_driver_probe,
.remove = ehci_rtl819x_driver_remove,
.driver = {
.name = "rtl819x-ehci",
}
};
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