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/*
* ADM5120 HCD (Host Controller Driver) for USB
*
* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
*
* This file was derived from: drivers/usb/host/ohci-au1xxx.c
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
* (C) Copyright 2002 Hewlett-Packard Company
*
* Written by Christopher Hoover <ch@hpl.hp.com>
* Based on fragments of previous driver by Russell King et al.
*
* Modified for LH7A404 from ahcd-sa1111.c
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
* Modified for AMD Alchemy Au1xxx
* by Matt Porter <mporter@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <asm/bootinfo.h>
#include <asm/mach-adm5120/adm5120_defs.h>
#ifdef DEBUG
#define HCD_DBG(f, a...) printk(KERN_DEBUG "%s: " f, hcd_name, ## a)
#else
#define HCD_DBG(f, a...) do {} while (0)
#endif
#define HCD_ERR(f, a...) printk(KERN_ERR "%s: " f, hcd_name, ## a)
#define HCD_INFO(f, a...) printk(KERN_INFO "%s: " f, hcd_name, ## a)
/*-------------------------------------------------------------------------*/
static int admhc_adm5120_probe(const struct hc_driver *driver,
struct platform_device *dev)
{
int retval;
struct usb_hcd *hcd;
int irq;
struct resource *regs;
/* sanity checks */
regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!regs) {
HCD_DBG("no IOMEM resource found\n");
return -ENODEV;
}
irq = platform_get_irq(dev, 0);
if (irq < 0) {
HCD_DBG("no IRQ resource found\n");
return -ENODEV;
}
hcd = usb_create_hcd(driver, &dev->dev, "ADM5120");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = regs->start;
hcd->rsrc_len = regs->end - regs->start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
HCD_DBG("request_mem_region failed\n");
retval = -EBUSY;
goto err_dev;
}
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
if (!hcd->regs) {
HCD_DBG("ioremap failed\n");
retval = -ENOMEM;
goto err_mem;
}
admhc_hcd_init(hcd_to_admhcd(hcd));
retval = usb_add_hcd(hcd, irq, 0);
if (retval)
goto err_io;
return 0;
err_io:
iounmap(hcd->regs);
err_mem:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
err_dev:
usb_put_hcd(hcd);
return retval;
}
/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */
static void admhc_adm5120_remove(struct usb_hcd *hcd,
struct platform_device *dev)
{
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
}
static int admhc_adm5120_start(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int ret;
ret = admhc_init(ahcd);
if (ret < 0) {
HCD_ERR("unable to init %s\n", hcd->self.bus_name);
goto err;
}
ret = admhc_run(ahcd);
if (ret < 0) {
HCD_ERR("unable to run %s\n", hcd->self.bus_name);
goto err_stop;
}
return 0;
err_stop:
admhc_stop(hcd);
err:
return ret;
}
static const struct hc_driver adm5120_hc_driver = {
.description = hcd_name,
.product_desc = "ADM5120 built-in USB 1.1 Host Controller",
.hcd_priv_size = sizeof(struct admhcd),
/*
* generic hardware linkage
*/
.irq = admhc_irq,
.flags = HCD_USB11 | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = admhc_adm5120_start,
.stop = admhc_stop,
.shutdown = admhc_shutdown,
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = admhc_urb_enqueue,
.urb_dequeue = admhc_urb_dequeue,
.endpoint_disable = admhc_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = admhc_get_frame_number,
/*
* root hub support
*/
.hub_status_data = admhc_hub_status_data,
.hub_control = admhc_hub_control,
#ifdef CONFIG_PM
.bus_suspend = admhc_bus_suspend,
.bus_resume = admhc_bus_resume,
#endif
.start_port_reset = admhc_start_port_reset,
};
static int usb_hcd_adm5120_probe(struct platform_device *pdev)
{
int ret;
ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev);
return ret;
}
static int usb_hcd_adm5120_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
admhc_adm5120_remove(hcd, pdev);
return 0;
}
#ifdef CONFIG_PM
/* TODO */
static int usb_hcd_adm5120_suspend(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
return 0;
}
static int usb_hcd_adm5120_resume(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
return 0;
}
#else
#define usb_hcd_adm5120_suspend NULL
#define usb_hcd_adm5120_resume NULL
#endif /* CONFIG_PM */
static struct platform_driver usb_hcd_adm5120_driver = {
.probe = usb_hcd_adm5120_probe,
.remove = usb_hcd_adm5120_remove,
.shutdown = usb_hcd_platform_shutdown,
.suspend = usb_hcd_adm5120_suspend,
.resume = usb_hcd_adm5120_resume,
.driver = {
.name = "adm5120-hcd",
.owner = THIS_MODULE,
},
};
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