mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-19 01:47:19 +02:00
5b5e6922c6
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30652 3c298f89-4303-0410-b956-a3cf2f4a3e73
163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
/*
|
|
* Bus Glue for the built-in EHCI controller of the Ralink RT3662/RT3883 SoCs
|
|
*
|
|
* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
|
|
*
|
|
* Parts of this file are based on Ralink's 2.6.21 BSP
|
|
*
|
|
* 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 <asm/mach-ralink/rt3883.h>
|
|
#include <asm/mach-ralink/rt3883_ehci_platform.h>
|
|
|
|
static int ehci_rt3883_init(struct usb_hcd *hcd)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
int ret;
|
|
|
|
ehci->caps = hcd->regs;
|
|
ehci->regs = hcd->regs +
|
|
HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
|
|
dbg_hcs_params(ehci, "reset");
|
|
dbg_hcc_params(ehci, "reset");
|
|
|
|
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
|
|
ehci->sbrn = 0x20;
|
|
|
|
ehci_reset(ehci);
|
|
|
|
ret = ehci_init(hcd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ehci_port_power(ehci, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hc_driver ehci_rt3883_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "Ralink RT3883 built-in EHCI controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
.reset = ehci_rt3883_init,
|
|
.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,
|
|
.relinquish_port = ehci_relinquish_port,
|
|
.port_handed_over = ehci_port_handed_over,
|
|
|
|
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
};
|
|
|
|
static int ehci_rt3883_probe(struct platform_device *pdev)
|
|
{
|
|
struct rt3883_ehci_platform_data *pdata;
|
|
struct usb_hcd *hcd;
|
|
struct resource *res;
|
|
int irq;
|
|
int ret;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
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(&ehci_rt3883_hc_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;
|
|
}
|
|
|
|
pdata = pdev->dev.platform_data;
|
|
if (pdata && pdata->start_hw)
|
|
pdata->start_hw();
|
|
|
|
ret = usb_add_hcd(hcd, irq, 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;
|
|
}
|
|
|
|
static int ehci_rt3883_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
struct rt3883_ehci_platform_data *pdata;
|
|
|
|
usb_remove_hcd(hcd);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
|
|
pdata = pdev->dev.platform_data;
|
|
if (pdata && pdata->stop_hw)
|
|
pdata->stop_hw();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ehci_rt3883_driver = {
|
|
.probe = ehci_rt3883_probe,
|
|
.remove = ehci_rt3883_remove,
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "rt3883-ehci",
|
|
}
|
|
};
|
|
|
|
MODULE_ALIAS("platform:rt3883-ehci");
|