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/*
* Bus Glue for Loongson LS1X built-in EHCI controller.
*
* Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com>
*
* 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>
static int ehci_ls1x_reset(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int ret;
ehci->caps = hcd->regs;
ret = ehci_setup(hcd);
if (ret)
return ret;
ehci_port_power(ehci, 0);
return 0;
}
static const struct hc_driver ehci_ls1x_hc_driver = {
.description = hcd_name,
.product_desc = "LOONGSON1 EHCI",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_ls1x_reset,
.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,
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static int ehci_hcd_ls1x_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int ret;
pr_debug("initializing loongson1 ehci USB Controller\n");
if (usb_disabled())
return -ENODEV;
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
dev_name(&pdev->dev));
return -ENODEV;
}
irq = res->start;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no register addr. Check %s setup!\n",
dev_name(&pdev->dev));
return -ENODEV;
}
hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev,
dev_name(&pdev->dev));
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
if (hcd->regs == NULL) {
dev_dbg(&pdev->dev, "error mapping memory\n");
ret = -EFAULT;
goto err_put_hcd;
}
ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
if (ret)
goto err_put_hcd;
return ret;
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
static int ehci_hcd_ls1x_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
return 0;
}
static struct platform_driver ehci_ls1x_driver = {
.probe = ehci_hcd_ls1x_probe,
.remove = ehci_hcd_ls1x_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "ls1x-ehci",
.owner = THIS_MODULE,
},
};
MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci");
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