![Thomas Gleixner](/assets/img/avatar_default.png)
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
271 lines
6.4 KiB
C
271 lines
6.4 KiB
C
/*
|
|
* 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
|
|
*
|
|
* Bus Glue for Sharp LH7A404
|
|
*
|
|
* Written by Christopher Hoover <ch@hpl.hp.com>
|
|
* Based on fragments of previous driver by Rusell King et al.
|
|
*
|
|
* Modified for LH7A404 from ohci-sa1111.c
|
|
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/signal.h>
|
|
|
|
#include <asm/hardware.h>
|
|
|
|
|
|
extern int usb_disabled(void);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void lh7a404_start_hc(struct platform_device *dev)
|
|
{
|
|
printk(KERN_DEBUG __FILE__
|
|
": starting LH7A404 OHCI USB Controller\n");
|
|
|
|
/*
|
|
* Now, carefully enable the USB clock, and take
|
|
* the USB host controller out of reset.
|
|
*/
|
|
CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */
|
|
udelay(1000);
|
|
USBH_CMDSTATUS = OHCI_HCR;
|
|
|
|
printk(KERN_DEBUG __FILE__
|
|
": Clock to USB host has been enabled \n");
|
|
}
|
|
|
|
static void lh7a404_stop_hc(struct platform_device *dev)
|
|
{
|
|
printk(KERN_DEBUG __FILE__
|
|
": stopping LH7A404 OHCI USB Controller\n");
|
|
|
|
CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* configure so an HC device and id are always provided */
|
|
/* always called with process context; sleeping is OK */
|
|
|
|
|
|
/**
|
|
* usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Allocates basic resources for this USB host controller, and
|
|
* then invokes the start() method for the HCD associated with it
|
|
* through the hotplug entry's driver_data.
|
|
*
|
|
*/
|
|
int usb_hcd_lh7a404_probe (const struct hc_driver *driver,
|
|
struct platform_device *dev)
|
|
{
|
|
int retval;
|
|
struct usb_hcd *hcd;
|
|
|
|
if (dev->resource[1].flags != IORESOURCE_IRQ) {
|
|
pr_debug("resource[1] is not IORESOURCE_IRQ");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hcd = usb_create_hcd(driver, &dev->dev, "lh7a404");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
hcd->rsrc_start = dev->resource[0].start;
|
|
hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
pr_debug("request_mem_region failed");
|
|
retval = -EBUSY;
|
|
goto err1;
|
|
}
|
|
|
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (!hcd->regs) {
|
|
pr_debug("ioremap failed");
|
|
retval = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
lh7a404_start_hc(dev);
|
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
|
|
|
retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED);
|
|
if (retval == 0)
|
|
return retval;
|
|
|
|
lh7a404_stop_hc(dev);
|
|
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_lh7a404_remove - shutdown processing for LH7A404-based HCDs
|
|
* @dev: USB Host Controller being removed
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Reverses the effect of usb_hcd_lh7a404_probe(), first invoking
|
|
* the HCD's stop() method. It is always called from a thread
|
|
* context, normally "rmmod", "apmd", or something similar.
|
|
*
|
|
*/
|
|
void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev)
|
|
{
|
|
usb_remove_hcd(hcd);
|
|
lh7a404_stop_hc(dev);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int __devinit
|
|
ohci_lh7a404_start (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
int ret;
|
|
|
|
ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci);
|
|
if ((ret = ohci_init(ohci)) < 0)
|
|
return ret;
|
|
|
|
if ((ret = ohci_run (ohci)) < 0) {
|
|
err ("can't start %s", hcd->self.bus_name);
|
|
ohci_stop (hcd);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ohci_lh7a404_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "LH7A404 OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.start = ohci_lh7a404_start,
|
|
#ifdef CONFIG_PM
|
|
/* suspend: ohci_lh7a404_suspend, -- tbd */
|
|
/* resume: ohci_lh7a404_resume, -- tbd */
|
|
#endif /*CONFIG_PM*/
|
|
.stop = ohci_stop,
|
|
|
|
/*
|
|
* 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,
|
|
#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_lh7a404_drv_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
|
|
pr_debug ("In ohci_hcd_lh7a404_drv_probe");
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev);
|
|
return ret;
|
|
}
|
|
|
|
static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_hcd_lh7a404_remove(hcd, pdev);
|
|
return 0;
|
|
}
|
|
/*TBD*/
|
|
/*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
|
|
return 0;
|
|
}
|
|
static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
|
|
|
|
return 0;
|
|
}
|
|
*/
|
|
|
|
static struct platform_driver ohci_hcd_lh7a404_driver = {
|
|
.probe = ohci_hcd_lh7a404_drv_probe,
|
|
.remove = ohci_hcd_lh7a404_drv_remove,
|
|
/*.suspend = ohci_hcd_lh7a404_drv_suspend, */
|
|
/*.resume = ohci_hcd_lh7a404_drv_resume, */
|
|
.driver = {
|
|
.name = "lh7a404-ohci",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init ohci_hcd_lh7a404_init (void)
|
|
{
|
|
pr_debug (DRIVER_INFO " (LH7A404)");
|
|
pr_debug ("block sizes: ed %d td %d\n",
|
|
sizeof (struct ed), sizeof (struct td));
|
|
|
|
return platform_driver_register(&ohci_hcd_lh7a404_driver);
|
|
}
|
|
|
|
static void __exit ohci_hcd_lh7a404_cleanup (void)
|
|
{
|
|
platform_driver_unregister(&ohci_hcd_lh7a404_driver);
|
|
}
|
|
|
|
module_init (ohci_hcd_lh7a404_init);
|
|
module_exit (ohci_hcd_lh7a404_cleanup);
|