/*
* 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 2005 Embedded Alley Solutions, Inc.
*
* Bus Glue for PNX8550
*
* 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 PNX8550 from ohci-sa1111.c and sa-omap.c
* by Vitaly Wool <vitalywool@gmail.com>
*
* This file is licenced under the GPL.
*/
#include <linux/device.h>
#include <linux/platform_device.h>
#include <asm/mach-pnx8550/usb.h>
#include <asm/mach-pnx8550/int.h>
#include <asm/mach-pnx8550/pci.h>
#ifndef CONFIG_PNX8550
#error "This file is PNX8550 bus glue. CONFIG_PNX8550 must be defined."
#endif
extern int usb_disabled(void);
/*-------------------------------------------------------------------------*/
static void pnx8550_start_hc(struct platform_device *dev)
{
/*
* Set register CLK48CTL to enable and 48MHz
*/
outl(0x00000003, PCI_BASE | 0x0004770c);
/*
* Set register CLK12CTL to enable and 48MHz
*/
outl(0x00000003, PCI_BASE | 0x00047710);
udelay(100);
}
static void pnx8550_stop_hc(struct platform_device *dev)
{
udelay(10);
}
/*-------------------------------------------------------------------------*/
/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */
/**
* usb_hcd_pnx8550_probe - initialize pnx8550-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_pnx8550_probe (const struct hc_driver *driver,
struct platform_device *dev)
{
int retval;
struct usb_hcd *hcd;
if (dev->resource[0].flags != IORESOURCE_MEM ||
dev->resource[1].flags != IORESOURCE_IRQ) {
dev_err (&dev->dev,"invalid resource type\n");
return -ENOMEM;
}
hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");
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)) {
dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "
"failed\n", hcd->rsrc_start, hcd->rsrc_len);
retval = -EBUSY;
goto err1;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",
hcd->rsrc_start, hcd->rsrc_len);
retval = -ENOMEM;
goto err2;
}
pnx8550_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;
pnx8550_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_pnx8550_remove - shutdown processing for pnx8550-based HCDs
* @dev: USB Host Controller being removed
* Context: !in_interrupt()
*
* Reverses the effect of usb_hcd_pnx8550_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_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev)
{
usb_remove_hcd(hcd);
pnx8550_stop_hc(dev);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
/*-------------------------------------------------------------------------*/
static int __devinit
ohci_pnx8550_start (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int ret;
ohci_dbg (ohci, "ohci_pnx8550_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_pnx8550_hc_driver = {
.description = hcd_name,
.product_desc = "PNX8550 OHCI",
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = ohci_pnx8550_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_pnx8550_drv_probe(struct platform_device *pdev)
{
int ret;
if (usb_disabled())
return -ENODEV;
ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
return ret;
}
static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_hcd_pnx8550_remove(hcd, pdev);
return 0;
}
MODULE_ALIAS("platform:pnx8550-ohci");
static struct platform_driver ohci_hcd_pnx8550_driver = {
.driver = {
.name = "pnx8550-ohci",
.owner = THIS_MODULE,
},
.probe = ohci_hcd_pnx8550_drv_probe,
.remove = ohci_hcd_pnx8550_drv_remove,
};
