1/*
  2 * EHCI HCD for Netlogic XLS processors.
  3 *
  4 * (C) Copyright 2011 Netlogic Microsystems Inc.
  5 *
  6 *  Based on various ehci-*.c drivers
  7 *
  8 * This file is subject to the terms and conditions of the GNU General Public
  9 * License.  See the file COPYING in the main directory of this archive for
 10 * more details.
 11 */
 12
 13#include <linux/platform_device.h>
 14
 15static int ehci_xls_setup(struct usb_hcd *hcd)
 16{
 17	int	retval;
 18	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 19
 20	ehci->caps = hcd->regs;
 21	ehci->regs = hcd->regs +
 22		HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 23	dbg_hcs_params(ehci, "reset");
 24	dbg_hcc_params(ehci, "reset");
 25
 26	/* cache this readonly data; minimize chip reads */
 27	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 28
 29	retval = ehci_halt(ehci);
 30	if (retval)
 31		return retval;
 32
 33	/* data structure init */
 34	retval = ehci_init(hcd);
 35	if (retval)
 36		return retval;
 37
 38	ehci_reset(ehci);
 39
 40	return retval;
 41}
 42
 43int ehci_xls_probe_internal(const struct hc_driver *driver,
 44	struct platform_device *pdev)
 45{
 46	struct usb_hcd  *hcd;
 47	struct resource *res;
 48	int retval, irq;
 49
 50	/* Get our IRQ from an earlier registered Platform Resource */
 51	irq = platform_get_irq(pdev, 0);
 52	if (irq < 0) {
 53		dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n",
 54				dev_name(&pdev->dev));
 55		return -ENODEV;
 56	}
 57
 58	/* Get our Memory Handle */
 59	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 60	if (!res) {
 61		dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n",
 62				dev_name(&pdev->dev));
 63		return -ENODEV;
 64	}
 65	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
 66	if (!hcd) {
 67		retval = -ENOMEM;
 68		goto err1;
 69	}
 70
 71	hcd->rsrc_start = res->start;
 72	hcd->rsrc_len = resource_size(res);
 73
 74	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 75				driver->description)) {
 76		dev_dbg(&pdev->dev, "controller already in use\n");
 77		retval = -EBUSY;
 78		goto err2;
 79	}
 80	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 81
 82	if (hcd->regs == NULL) {
 83		dev_dbg(&pdev->dev, "error mapping memory\n");
 84		retval = -EFAULT;
 85		goto err3;
 86	}
 87
 88	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 89	if (retval != 0)
 90		goto err4;
 91	return retval;
 92
 93err4:
 94	iounmap(hcd->regs);
 95err3:
 96	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 97err2:
 98	usb_put_hcd(hcd);
 99err1:
100	dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev),
101			retval);
102	return retval;
103}
104
105static struct hc_driver ehci_xls_hc_driver = {
106	.description	= hcd_name,
107	.product_desc	= "XLS EHCI Host Controller",
108	.hcd_priv_size	= sizeof(struct ehci_hcd),
109	.irq		= ehci_irq,
110	.flags		= HCD_USB2 | HCD_MEMORY,
111	.reset		= ehci_xls_setup,
112	.start		= ehci_run,
113	.stop		= ehci_stop,
114	.shutdown	= ehci_shutdown,
115
116	.urb_enqueue	= ehci_urb_enqueue,
117	.urb_dequeue	= ehci_urb_dequeue,
118	.endpoint_disable = ehci_endpoint_disable,
119	.endpoint_reset	= ehci_endpoint_reset,
120
121	.get_frame_number = ehci_get_frame,
122
123	.hub_status_data = ehci_hub_status_data,
124	.hub_control	= ehci_hub_control,
125	.bus_suspend	= ehci_bus_suspend,
126	.bus_resume	= ehci_bus_resume,
127	.relinquish_port = ehci_relinquish_port,
128	.port_handed_over = ehci_port_handed_over,
129
130	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
131};
132
133static int ehci_xls_probe(struct platform_device *pdev)
134{
135	if (usb_disabled())
136		return -ENODEV;
137
138	return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev);
139}
140
141static int ehci_xls_remove(struct platform_device *pdev)
142{
143	struct usb_hcd *hcd = platform_get_drvdata(pdev);
144
145	usb_remove_hcd(hcd);
146	iounmap(hcd->regs);
147	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
148	usb_put_hcd(hcd);
149	return 0;
150}
151
152MODULE_ALIAS("ehci-xls");
153
154static struct platform_driver ehci_xls_driver = {
155	.probe		= ehci_xls_probe,
156	.remove		= ehci_xls_remove,
157	.shutdown	= usb_hcd_platform_shutdown,
158	.driver		= {
159		.name = "ehci-xls",
160	},
161};