154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/*
|
|
* Generic UHCI HCD (Host Controller Driver) for Platform Devices
|
|
*
|
|
* Copyright (c) 2011 Tony Prisk <linux@prisktech.co.nz>
|
|
*
|
|
* This file is based on uhci-grlib.c
|
|
* (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
|
|
*/
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
static int uhci_platform_init(struct usb_hcd *hcd)
|
|
{
|
|
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
|
|
|
|
uhci->rh_numports = uhci_count_ports(hcd);
|
|
|
|
/* Set up pointers to to generic functions */
|
|
uhci->reset_hc = uhci_generic_reset_hc;
|
|
uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
|
|
|
|
/* No special actions need to be taken for the functions below */
|
|
uhci->configure_hc = NULL;
|
|
uhci->resume_detect_interrupts_are_broken = NULL;
|
|
uhci->global_suspend_mode_is_broken = NULL;
|
|
|
|
/* Reset if the controller isn't already safely quiescent. */
|
|
check_and_reset_hc(uhci);
|
|
return 0;
|
|
}
|
|
|
|
static const struct hc_driver uhci_platform_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "Generic UHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct uhci_hcd),
|
|
|
|
/* Generic hardware linkage */
|
|
.irq = uhci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB11,
|
|
|
|
/* Basic lifecycle operations */
|
|
.reset = uhci_platform_init,
|
|
.start = uhci_start,
|
|
#ifdef CONFIG_PM
|
|
.pci_suspend = NULL,
|
|
.pci_resume = NULL,
|
|
.bus_suspend = uhci_rh_suspend,
|
|
.bus_resume = uhci_rh_resume,
|
|
#endif
|
|
.stop = uhci_stop,
|
|
|
|
.urb_enqueue = uhci_urb_enqueue,
|
|
.urb_dequeue = uhci_urb_dequeue,
|
|
|
|
.endpoint_disable = uhci_hcd_endpoint_disable,
|
|
.get_frame_number = uhci_hcd_get_frame_number,
|
|
|
|
.hub_status_data = uhci_hub_status_data,
|
|
.hub_control = uhci_hub_control,
|
|
};
|
|
|
|
static int uhci_hcd_platform_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct uhci_hcd *uhci;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Right now device-tree probed devices don't get dma_mask set.
|
|
* Since shared usb code relies on it, set it here for now.
|
|
* Once we have dma capability bindings this can go away.
|
|
*/
|
|
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
|
|
pdev->name);
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(hcd->regs)) {
|
|
ret = PTR_ERR(hcd->regs);
|
|
goto err_rmr;
|
|
}
|
|
hcd->rsrc_start = res->start;
|
|
hcd->rsrc_len = resource_size(res);
|
|
|
|
uhci = hcd_to_uhci(hcd);
|
|
|
|
uhci->regs = hcd->regs;
|
|
|
|
ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
|
|
if (ret)
|
|
goto err_rmr;
|
|
|
|
device_wakeup_enable(hcd->self.controller);
|
|
return 0;
|
|
|
|
err_rmr:
|
|
usb_put_hcd(hcd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int uhci_hcd_platform_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_hcd(hcd);
|
|
usb_put_hcd(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure the controller is quiescent and that we're not using it
|
|
* any more. This is mainly for the benefit of programs which, like kexec,
|
|
* expect the hardware to be idle: not doing DMA or generating IRQs.
|
|
*
|
|
* This routine may be called in a damaged or failing kernel. Hence we
|
|
* do not acquire the spinlock before shutting down the controller.
|
|
*/
|
|
static void uhci_hcd_platform_shutdown(struct platform_device *op)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(op);
|
|
|
|
uhci_hc_died(hcd_to_uhci(hcd));
|
|
}
|
|
|
|
static const struct of_device_id platform_uhci_ids[] = {
|
|
{ .compatible = "generic-uhci", },
|
|
{ .compatible = "platform-uhci", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, platform_uhci_ids);
|
|
|
|
static struct platform_driver uhci_platform_driver = {
|
|
.probe = uhci_hcd_platform_probe,
|
|
.remove = uhci_hcd_platform_remove,
|
|
.shutdown = uhci_hcd_platform_shutdown,
|
|
.driver = {
|
|
.name = "platform-uhci",
|
|
.of_match_table = platform_uhci_ids,
|
|
},
|
|
};
|