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/*
* drivers/usb/host/ehci-vt8500.c
*
* Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
*
* Based on ehci-au1xxx.c
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/platform_device.h>
static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int rc = 0;
if (!udev->parent) /* udev is root hub itself, impossible */
rc = -1;
/* we only support lpm device connected to root hub yet */
if (ehci->has_lpm && !udev->parent->parent) {
rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
if (!rc)
rc = ehci_lpm_check(ehci, udev->portnum);
}
return rc;
}
static const struct hc_driver vt8500_ehci_hc_driver = {
.description = hcd_name,
.product_desc = "VT8500 EHCI",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_init,
.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,
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
/*
* call back when device connected and addressed
*/
.update_device = ehci_update_device,
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};
static int vt8500_ehci_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
struct resource *res;
int ret;
if (usb_disabled())
return -ENODEV;
if (pdev->resource[1].flags != IORESOURCE_IRQ) {
pr_debug("resource[1] is not IORESOURCE_IRQ");
return -ENOMEM;
}
hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500");
if (!hcd)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
pr_debug("request_mem_region failed");
ret = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
pr_debug("ioremap failed");
ret = -ENOMEM;
goto err2;
}
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs;
ehci->regs = hcd->regs +
HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
dbg_hcs_params(ehci, "reset");
dbg_hcc_params(ehci, "reset");
/* cache this readonly data; minimize chip reads */
ehci->hcs_params = readl(&ehci->caps->hcs_params);
ehci_port_power(ehci, 1);
ehci_reset(ehci);
ret = usb_add_hcd(hcd, pdev->resource[1].start,
IRQF_SHARED);
if (ret == 0) {
platform_set_drvdata(pdev, hcd);
return ret;
}
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
return ret;
}
static int vt8500_ehci_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
platform_set_drvdata(pdev, NULL);
return 0;
}
static struct platform_driver vt8500_ehci_driver = {
.probe = vt8500_ehci_drv_probe,
.remove = vt8500_ehci_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "vt8500-ehci",
.owner = THIS_MODULE,
}
};
MODULE_ALIAS("platform:vt8500-ehci");
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