1/*
  2 * IXP4XX EHCI Host Controller Driver
  3 *
  4 * Author: Vladimir Barinov <vbarinov@embeddedalley.com>
  5 *
  6 * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
  7 *
  8 * 2007 (c) MontaVista Software, Inc. This file is licensed under
  9 * the terms of the GNU General Public License version 2. This program
 10 * is licensed "as is" without any warranty of any kind, whether express
 11 * or implied.
 12 */
 13
 14#include <linux/platform_device.h>
 15
 16static int ixp4xx_ehci_init(struct usb_hcd *hcd)
 17{
 18	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 19	int retval = 0;
 20
 21	ehci->big_endian_desc = 1;
 22	ehci->big_endian_mmio = 1;
 23
 24	ehci->caps = hcd->regs + 0x100;
 25	ehci->regs = hcd->regs + 0x100
 26		+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 27	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 28
 29	hcd->has_tt = 1;
 30	ehci_reset(ehci);
 31
 32	retval = ehci_init(hcd);
 33	if (retval)
 34		return retval;
 35
 36	ehci_port_power(ehci, 0);
 37
 38	return retval;
 39}
 40
 41static const struct hc_driver ixp4xx_ehci_hc_driver = {
 42	.description		= hcd_name,
 43	.product_desc		= "IXP4XX EHCI Host Controller",
 44	.hcd_priv_size		= sizeof(struct ehci_hcd),
 45	.irq			= ehci_irq,
 46	.flags			= HCD_MEMORY | HCD_USB2,
 47	.reset			= ixp4xx_ehci_init,
 48	.start			= ehci_run,
 49	.stop			= ehci_stop,
 50	.shutdown		= ehci_shutdown,
 51	.urb_enqueue		= ehci_urb_enqueue,
 52	.urb_dequeue		= ehci_urb_dequeue,
 53	.endpoint_disable	= ehci_endpoint_disable,
 54	.endpoint_reset		= ehci_endpoint_reset,
 55	.get_frame_number	= ehci_get_frame,
 56	.hub_status_data	= ehci_hub_status_data,
 57	.hub_control		= ehci_hub_control,
 58#if defined(CONFIG_PM)
 59	.bus_suspend		= ehci_bus_suspend,
 60	.bus_resume		= ehci_bus_resume,
 61#endif
 62	.relinquish_port	= ehci_relinquish_port,
 63	.port_handed_over	= ehci_port_handed_over,
 64
 65	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
 66};
 67
 68static int ixp4xx_ehci_probe(struct platform_device *pdev)
 69{
 70	struct usb_hcd *hcd;
 71	const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
 72	struct resource *res;
 73	int irq;
 74	int retval;
 75
 76	if (usb_disabled())
 77		return -ENODEV;
 78
 79	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 80	if (!res) {
 81		dev_err(&pdev->dev,
 82			"Found HC with no IRQ. Check %s setup!\n",
 83			dev_name(&pdev->dev));
 84		return -ENODEV;
 85	}
 86	irq = res->start;
 87
 88	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 89	if (!hcd) {
 90		retval = -ENOMEM;
 91		goto fail_create_hcd;
 92	}
 93
 94	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 95	if (!res) {
 96		dev_err(&pdev->dev,
 97			"Found HC with no register addr. Check %s setup!\n",
 98			dev_name(&pdev->dev));
 99		retval = -ENODEV;
100		goto fail_request_resource;
101	}
102	hcd->rsrc_start = res->start;
103	hcd->rsrc_len = resource_size(res);
104
105	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
106				driver->description)) {
107		dev_dbg(&pdev->dev, "controller already in use\n");
108		retval = -EBUSY;
109		goto fail_request_resource;
110	}
111
112	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
113	if (hcd->regs == NULL) {
114		dev_dbg(&pdev->dev, "error mapping memory\n");
115		retval = -EFAULT;
116		goto fail_ioremap;
117	}
118
119	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
120	if (retval)
121		goto fail_add_hcd;
122
123	return retval;
124
125fail_add_hcd:
126	iounmap(hcd->regs);
127fail_ioremap:
128	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
129fail_request_resource:
130	usb_put_hcd(hcd);
131fail_create_hcd:
132	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
133	return retval;
134}
135
136static int ixp4xx_ehci_remove(struct platform_device *pdev)
137{
138	struct usb_hcd *hcd = platform_get_drvdata(pdev);
139
140	usb_remove_hcd(hcd);
141	iounmap(hcd->regs);
142	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
143	usb_put_hcd(hcd);
144
145	return 0;
146}
147
148MODULE_ALIAS("platform:ixp4xx-ehci");
149
150static struct platform_driver ixp4xx_ehci_driver = {
151	.probe = ixp4xx_ehci_probe,
152	.remove = ixp4xx_ehci_remove,
153	.driver = {
154		.name = "ixp4xx-ehci",
155	},
156};