d413984ae9
This teaches OHCI to use the root hub status change (RHSC) IRQ, bypassing root hub timers most of the time and switching over to the "new" root hub polling scheme. It's complicated by the fact that implementations of OHCI trigger and ack that IRQ differently (the spec is vague there). Avoiding root hub timers helps mechanisms like "dynamic tick" leave the CPU in lowpower modes for longer intervals. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
287 lines
7 KiB
C
287 lines
7 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
|
|
*
|
|
* SA1111 Bus Glue
|
|
*
|
|
* Written by Christopher Hoover <ch@hpl.hp.com>
|
|
* Based on fragments of previous driver by Rusell King et al.
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <asm/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/arch/assabet.h>
|
|
#include <asm/arch/badge4.h>
|
|
#include <asm/hardware/sa1111.h>
|
|
|
|
#ifndef CONFIG_SA1111
|
|
#error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined."
|
|
#endif
|
|
|
|
extern int usb_disabled(void);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void sa1111_start_hc(struct sa1111_dev *dev)
|
|
{
|
|
unsigned int usb_rst = 0;
|
|
|
|
printk(KERN_DEBUG __FILE__
|
|
": starting SA-1111 OHCI USB Controller\n");
|
|
|
|
#ifdef CONFIG_SA1100_BADGE4
|
|
if (machine_is_badge4()) {
|
|
badge4_set_5V(BADGE4_5V_USB, 1);
|
|
}
|
|
#endif
|
|
|
|
if (machine_is_xp860() ||
|
|
machine_has_neponset() ||
|
|
machine_is_pfs168() ||
|
|
machine_is_badge4())
|
|
usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
|
|
|
|
/*
|
|
* Configure the power sense and control lines. Place the USB
|
|
* host controller in reset.
|
|
*/
|
|
sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
|
|
dev->mapbase + SA1111_USB_RESET);
|
|
|
|
/*
|
|
* Now, carefully enable the USB clock, and take
|
|
* the USB host controller out of reset.
|
|
*/
|
|
sa1111_enable_device(dev);
|
|
udelay(11);
|
|
sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET);
|
|
}
|
|
|
|
static void sa1111_stop_hc(struct sa1111_dev *dev)
|
|
{
|
|
unsigned int usb_rst;
|
|
printk(KERN_DEBUG __FILE__
|
|
": stopping SA-1111 OHCI USB Controller\n");
|
|
|
|
/*
|
|
* Put the USB host controller into reset.
|
|
*/
|
|
usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET);
|
|
sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
|
|
dev->mapbase + SA1111_USB_RESET);
|
|
|
|
/*
|
|
* Stop the USB clock.
|
|
*/
|
|
sa1111_disable_device(dev);
|
|
|
|
#ifdef CONFIG_SA1100_BADGE4
|
|
if (machine_is_badge4()) {
|
|
/* Disable power to the USB bus */
|
|
badge4_set_5V(BADGE4_5V_USB, 0);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#if 0
|
|
static void dump_hci_status(struct usb_hcd *hcd, const char *label)
|
|
{
|
|
unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS);
|
|
|
|
dbg ("%s USB_STATUS = { %s%s%s%s%s}", label,
|
|
((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
|
|
((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
|
|
((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
|
|
((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
|
|
((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
|
|
}
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* configure so an HC device and id are always provided */
|
|
/* always called with process context; sleeping is OK */
|
|
|
|
|
|
/**
|
|
* usb_hcd_sa1111_probe - initialize SA-1111-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.
|
|
*
|
|
* Store this function in the HCD's struct pci_driver as probe().
|
|
*/
|
|
int usb_hcd_sa1111_probe (const struct hc_driver *driver,
|
|
struct sa1111_dev *dev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
int retval;
|
|
|
|
hcd = usb_create_hcd (driver, &dev->dev, "sa1111");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
hcd->rsrc_start = dev->res.start;
|
|
hcd->rsrc_len = dev->res.end - dev->res.start + 1;
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
dbg("request_mem_region failed");
|
|
retval = -EBUSY;
|
|
goto err1;
|
|
}
|
|
hcd->regs = dev->mapbase;
|
|
|
|
sa1111_start_hc(dev);
|
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
|
|
|
retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED);
|
|
if (retval == 0)
|
|
return retval;
|
|
|
|
sa1111_stop_hc(dev);
|
|
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_sa1111_remove - shutdown processing for SA-1111-based HCDs
|
|
* @dev: USB Host Controller being removed
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Reverses the effect of usb_hcd_sa1111_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_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev)
|
|
{
|
|
usb_remove_hcd(hcd);
|
|
sa1111_stop_hc(dev);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int __devinit
|
|
ohci_sa1111_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", hcd->self.bus_name);
|
|
ohci_stop (hcd);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static const struct hc_driver ohci_sa1111_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "SA-1111 OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.start = ohci_sa1111_start,
|
|
.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,
|
|
.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_sa1111_drv_probe(struct sa1111_dev *dev)
|
|
{
|
|
int ret;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev);
|
|
return ret;
|
|
}
|
|
|
|
static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev)
|
|
{
|
|
struct usb_hcd *hcd = sa1111_get_drvdata(dev);
|
|
|
|
usb_hcd_sa1111_remove(hcd, dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct sa1111_driver ohci_hcd_sa1111_driver = {
|
|
.drv = {
|
|
.name = "sa1111-ohci",
|
|
},
|
|
.devid = SA1111_DEVID_USB,
|
|
.probe = ohci_hcd_sa1111_drv_probe,
|
|
.remove = ohci_hcd_sa1111_drv_remove,
|
|
};
|
|
|
|
static int __init ohci_hcd_sa1111_init (void)
|
|
{
|
|
dbg (DRIVER_INFO " (SA-1111)");
|
|
dbg ("block sizes: ed %d td %d",
|
|
sizeof (struct ed), sizeof (struct td));
|
|
|
|
return sa1111_driver_register(&ohci_hcd_sa1111_driver);
|
|
}
|
|
|
|
static void __exit ohci_hcd_sa1111_cleanup (void)
|
|
{
|
|
sa1111_driver_unregister(&ohci_hcd_sa1111_driver);
|
|
}
|
|
|
|
module_init (ohci_hcd_sa1111_init);
|
|
module_exit (ohci_hcd_sa1111_cleanup);
|