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