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/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
* (C) Copyright 2002 Hewlett-Packard Company
* (C) Copyright 2003-2005 MontaVista Software Inc.
*
* Bus Glue for PPC On-Chip OHCI driver
* Tested on Freescale MPC5200 and IBM STB04xxx
*
* Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
*
* This file is licenced under the GPL.
*/
#include <linux/platform_device.h>
#include <linux/signal.h>
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
/**
* usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
* Context: !in_interrupt()
*
* Allocates basic resources for this USB host controller.
*
* Store this function in the HCD's struct pci_driver as probe().
*/
static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
struct platform_device *pdev)
{
int retval;
struct usb_hcd *hcd;
struct ohci_hcd *ohci;
struct resource *res;
int irq;
pr_debug("initializing PPC-SOC USB Controller\n");
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
pr_debug(__FILE__ ": no irq\n");
return -ENODEV;
}
irq = res->start;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
pr_debug(__FILE__ ": no reg addr\n");
return -ENODEV;
}
hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
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)) {
pr_debug(__FILE__ ": request_mem_region failed\n");
retval = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
pr_debug(__FILE__ ": ioremap failed\n");
retval = -ENOMEM;
goto err2;
}
ohci = hcd_to_ohci(hcd);
ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
#ifdef CONFIG_PPC_MPC52xx
/* MPC52xx doesn't need frame_no shift */
ohci->flags |= OHCI_QUIRK_FRAME_NO;
#endif
ohci_hcd_init(ohci);
retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
if (retval == 0)
return retval;
pr_debug("Removing PPC-SOC USB Controller\n");
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err1:
usb_put_hcd(hcd);
return retval;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
/**
* usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
* @pdev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_hcd_ppc_soc_probe().
* It is always called from a thread
* context, normally "rmmod", "apmd", or something similar.
*
*/
static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
struct platform_device *pdev)
{
usb_remove_hcd(hcd);
pr_debug("stopping PPC-SOC USB Controller\n");
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static int __devinit
ohci_ppc_soc_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
if ((ret = ohci_init(ohci)) < 0)
return ret;
if ((ret = ohci_run(ohci)) < 0) {
err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
ohci_stop(hcd);
return ret;
}
return 0;
}
static const struct hc_driver ohci_ppc_soc_hc_driver = {
.description = hcd_name,
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = ohci_ppc_soc_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
.hub_irq_enable = ohci_rhsc_enable,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
{
int ret;
if (usb_disabled())
return -ENODEV;
ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
return ret;
}
static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_hcd_ppc_soc_remove(hcd, pdev);
return 0;
}
static struct platform_driver ohci_hcd_ppc_soc_driver = {
.probe = ohci_hcd_ppc_soc_drv_probe,
.remove = ohci_hcd_ppc_soc_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
/*.suspend = ohci_hcd_ppc_soc_drv_suspend,*/
/*.resume = ohci_hcd_ppc_soc_drv_resume,*/
#endif
.driver = {
.name = "ppc-soc-ohci",
.owner = THIS_MODULE,
},
};
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