f30cdbcb2e
Use ehci_setup() in ehci_ls1x_reset(). The Loongson1x SoCs have a built-in EHCI controller. This patch adds the necessary glue code to make the generic EHCI driver usable for them. Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
159 lines
3.4 KiB
C
159 lines
3.4 KiB
C
/*
|
|
* 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);
|
|
|
|
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 == NULL) {
|
|
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 ret;
|
|
|
|
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_hcd_ls1x_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);
|
|
|
|
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");
|