mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
2e1dcc1600
Add power management functions for the pxa27x USB OHCI host controller. This is a totally rewritten version of the patch by Nicolas Pitre and Todd Poynor which accounts for recent USB changes. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
379 lines
8.3 KiB
C
379 lines
8.3 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 pxa27x
|
|
*
|
|
* Written by Christopher Hoover <ch@hpl.hp.com>
|
|
* Based on fragments of previous driver by Russell King et al.
|
|
*
|
|
* Modified for LH7A404 from ohci-sa1111.c
|
|
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
|
|
*
|
|
* Modified for pxa27x from ohci-lh7a404.c
|
|
* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/arch/pxa-regs.h>
|
|
#include <asm/arch/ohci.h>
|
|
|
|
#define PXA_UHC_MAX_PORTNUM 3
|
|
|
|
#define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
|
|
|
|
/*
|
|
PMM_NPS_MODE -- PMM Non-power switching mode
|
|
Ports are powered continuously.
|
|
|
|
PMM_GLOBAL_MODE -- PMM global switching mode
|
|
All ports are powered at the same time.
|
|
|
|
PMM_PERPORT_MODE -- PMM per port switching mode
|
|
Ports are powered individually.
|
|
*/
|
|
static int pxa27x_ohci_select_pmm( int mode )
|
|
{
|
|
switch ( mode ) {
|
|
case PMM_NPS_MODE:
|
|
UHCRHDA |= RH_A_NPS;
|
|
break;
|
|
case PMM_GLOBAL_MODE:
|
|
UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
|
|
break;
|
|
case PMM_PERPORT_MODE:
|
|
UHCRHDA &= ~(RH_A_NPS);
|
|
UHCRHDA |= RH_A_PSM;
|
|
|
|
/* Set port power control mask bits, only 3 ports. */
|
|
UHCRHDB |= (0x7<<17);
|
|
break;
|
|
default:
|
|
printk( KERN_ERR
|
|
"Invalid mode %d, set to non-power switch mode.\n",
|
|
mode );
|
|
|
|
UHCRHDA |= RH_A_NPS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern int usb_disabled(void);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int pxa27x_start_hc(struct device *dev)
|
|
{
|
|
int retval = 0;
|
|
struct pxaohci_platform_data *inf;
|
|
|
|
inf = dev->platform_data;
|
|
|
|
pxa_set_cken(CKEN10_USBHOST, 1);
|
|
|
|
UHCHR |= UHCHR_FHR;
|
|
udelay(11);
|
|
UHCHR &= ~UHCHR_FHR;
|
|
|
|
UHCHR |= UHCHR_FSBIR;
|
|
while (UHCHR & UHCHR_FSBIR)
|
|
cpu_relax();
|
|
|
|
if (inf->init)
|
|
retval = inf->init(dev);
|
|
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
UHCHR &= ~UHCHR_SSE;
|
|
|
|
UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
|
|
|
|
/* Clear any OTG Pin Hold */
|
|
if (PSSR & PSSR_OTGPH)
|
|
PSSR |= PSSR_OTGPH;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pxa27x_stop_hc(struct device *dev)
|
|
{
|
|
struct pxaohci_platform_data *inf;
|
|
|
|
inf = dev->platform_data;
|
|
|
|
if (inf->exit)
|
|
inf->exit(dev);
|
|
|
|
UHCHR |= UHCHR_FHR;
|
|
udelay(11);
|
|
UHCHR &= ~UHCHR_FHR;
|
|
|
|
UHCCOMS |= 1;
|
|
udelay(10);
|
|
|
|
pxa_set_cken(CKEN10_USBHOST, 0);
|
|
}
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* configure so an HC device and id are always provided */
|
|
/* always called with process context; sleeping is OK */
|
|
|
|
|
|
/**
|
|
* usb_hcd_pxa27x_probe - initialize pxa27x-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_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
|
|
{
|
|
int retval;
|
|
struct usb_hcd *hcd;
|
|
struct pxaohci_platform_data *inf;
|
|
|
|
inf = pdev->dev.platform_data;
|
|
|
|
if (!inf)
|
|
return -ENODEV;
|
|
|
|
if (pdev->resource[1].flags != IORESOURCE_IRQ) {
|
|
pr_debug ("resource[1] is not IORESOURCE_IRQ");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
hcd->rsrc_start = pdev->resource[0].start;
|
|
hcd->rsrc_len = pdev->resource[0].end - pdev->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;
|
|
}
|
|
|
|
if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
|
|
pr_debug("pxa27x_start_hc failed");
|
|
goto err3;
|
|
}
|
|
|
|
/* Select Power Management Mode */
|
|
pxa27x_ohci_select_pmm(inf->port_mode);
|
|
|
|
ohci_hcd_init(hcd_to_ohci(hcd));
|
|
|
|
retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
|
|
if (retval == 0)
|
|
return retval;
|
|
|
|
pxa27x_stop_hc(&pdev->dev);
|
|
err3:
|
|
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_pxa27x_remove - shutdown processing for pxa27x-based HCDs
|
|
* @dev: USB Host Controller being removed
|
|
* Context: !in_interrupt()
|
|
*
|
|
* Reverses the effect of usb_hcd_pxa27x_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_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
|
|
{
|
|
usb_remove_hcd(hcd);
|
|
pxa27x_stop_hc(&pdev->dev);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int __devinit
|
|
ohci_pxa27x_start (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
int ret;
|
|
|
|
ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
|
|
|
|
/* The value of NDP in roothub_a is incorrect on this hardware */
|
|
ohci->num_ports = 3;
|
|
|
|
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_pxa27x_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "PXA27x OHCI",
|
|
.hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ohci_irq,
|
|
.flags = HCD_USB11 | HCD_MEMORY,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.start = ohci_pxa27x_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,
|
|
#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_pxa27x_drv_probe(struct platform_device *pdev)
|
|
{
|
|
pr_debug ("In ohci_hcd_pxa27x_drv_probe");
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
|
|
}
|
|
|
|
static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_hcd_pxa27x_remove(hcd, pdev);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct ohci_hcd *ohci = platform_get_drvdata(pdev);
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
pxa27x_stop_hc(&pdev->dev);
|
|
ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
|
|
pdev->dev.power.power_state = PMSG_SUSPEND;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
|
|
{
|
|
struct ohci_hcd *ohci = platform_get_drvdata(pdev);
|
|
int status;
|
|
|
|
if (time_before(jiffies, ohci->next_statechange))
|
|
msleep(5);
|
|
ohci->next_statechange = jiffies;
|
|
|
|
if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
|
|
return status;
|
|
|
|
pdev->dev.power.power_state = PMSG_ON;
|
|
usb_hcd_resume_root_hub(platform_get_drvdata(pdev));
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
static struct platform_driver ohci_hcd_pxa27x_driver = {
|
|
.probe = ohci_hcd_pxa27x_drv_probe,
|
|
.remove = ohci_hcd_pxa27x_drv_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ohci_hcd_pxa27x_drv_suspend,
|
|
.resume = ohci_hcd_pxa27x_drv_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = "pxa27x-ohci",
|
|
},
|
|
};
|
|
|
|
static int __init ohci_hcd_pxa27x_init (void)
|
|
{
|
|
pr_debug (DRIVER_INFO " (pxa27x)");
|
|
pr_debug ("block sizes: ed %d td %d\n",
|
|
sizeof (struct ed), sizeof (struct td));
|
|
|
|
return platform_driver_register(&ohci_hcd_pxa27x_driver);
|
|
}
|
|
|
|
static void __exit ohci_hcd_pxa27x_cleanup (void)
|
|
{
|
|
platform_driver_unregister(&ohci_hcd_pxa27x_driver);
|
|
}
|
|
|
|
module_init (ohci_hcd_pxa27x_init);
|
|
module_exit (ohci_hcd_pxa27x_cleanup);
|