1/*
  2 *  OHCI HCD (Host Controller Driver) for USB.
  3 *
  4 *  Bus Glue for Atheros AR71XX/AR724X built-in OHCI controller.
  5 *
  6 *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
  7 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  8 *
  9 *  Parts of this file are based on Atheros' 2.6.15 BSP
 10 *	Copyright (C) 2007 Atheros Communications, Inc.
 11 *
 12 *  This program is free software; you can redistribute it and/or modify it
 13 *  under the terms of the GNU General Public License version 2 as published
 14 *  by the Free Software Foundation.
 15 */
 16
 17#include <linux/platform_device.h>
 18
 19static int __devinit ohci_ath79_start(struct usb_hcd *hcd)
 20{
 21	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
 22	int ret;
 23
 24	ret = ohci_init(ohci);
 25	if (ret < 0)
 26		return ret;
 27
 28	ret = ohci_run(ohci);
 29	if (ret < 0)
 30		goto err;
 31
 32	return 0;
 33
 34err:
 35	ohci_stop(hcd);
 36	return ret;
 37}
 38
 39static const struct hc_driver ohci_ath79_hc_driver = {
 40	.description		= hcd_name,
 41	.product_desc		= "Atheros built-in OHCI controller",
 42	.hcd_priv_size		= sizeof(struct ohci_hcd),
 43
 44	.irq			= ohci_irq,
 45	.flags			= HCD_USB11 | HCD_MEMORY,
 46
 47	.start			= ohci_ath79_start,
 48	.stop			= ohci_stop,
 49	.shutdown		= ohci_shutdown,
 50
 51	.urb_enqueue		= ohci_urb_enqueue,
 52	.urb_dequeue		= ohci_urb_dequeue,
 53	.endpoint_disable	= ohci_endpoint_disable,
 54
 55	/*
 56	 * scheduling support
 57	 */
 58	.get_frame_number	= ohci_get_frame,
 59
 60	/*
 61	 * root hub support
 62	 */
 63	.hub_status_data	= ohci_hub_status_data,
 64	.hub_control		= ohci_hub_control,
 65	.start_port_reset	= ohci_start_port_reset,
 66};
 67
 68static int ohci_ath79_probe(struct platform_device *pdev)
 69{
 70	struct usb_hcd *hcd;
 71	struct resource *res;
 72	int irq;
 73	int ret;
 74
 75	if (usb_disabled())
 76		return -ENODEV;
 77
 78	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 79	if (!res) {
 80		dev_dbg(&pdev->dev, "no IRQ specified\n");
 81		return -ENODEV;
 82	}
 83	irq = res->start;
 84
 85	hcd = usb_create_hcd(&ohci_ath79_hc_driver, &pdev->dev,
 86			     dev_name(&pdev->dev));
 87	if (!hcd)
 88		return -ENOMEM;
 89
 90	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 91	if (!res) {
 92		dev_dbg(&pdev->dev, "no base address specified\n");
 93		ret = -ENODEV;
 94		goto err_put_hcd;
 95	}
 96	hcd->rsrc_start = res->start;
 97	hcd->rsrc_len = resource_size(res);
 98
 99	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
100		dev_dbg(&pdev->dev, "controller already in use\n");
101		ret = -EBUSY;
102		goto err_put_hcd;
103	}
104
105	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
106	if (!hcd->regs) {
107		dev_dbg(&pdev->dev, "error mapping memory\n");
108		ret = -EFAULT;
109		goto err_release_region;
110	}
111
112	ohci_hcd_init(hcd_to_ohci(hcd));
113
114	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
115	if (ret)
116		goto err_stop_hcd;
117
118	return 0;
119
120err_stop_hcd:
121	iounmap(hcd->regs);
122err_release_region:
123	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
124err_put_hcd:
125	usb_put_hcd(hcd);
126	return ret;
127}
128
129static int ohci_ath79_remove(struct platform_device *pdev)
130{
131	struct usb_hcd *hcd = platform_get_drvdata(pdev);
132
133	usb_remove_hcd(hcd);
134	iounmap(hcd->regs);
135	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
136	usb_put_hcd(hcd);
137
138	return 0;
139}
140
141static struct platform_driver ohci_hcd_ath79_driver = {
142	.probe		= ohci_ath79_probe,
143	.remove		= ohci_ath79_remove,
144	.shutdown	= usb_hcd_platform_shutdown,
145	.driver		= {
146		.name	= "ath79-ohci",
147		.owner	= THIS_MODULE,
148	},
149};
150
151MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ohci");