1/*
  2 * OHCI HCD for Netlogic XLS processors.
  3 *
  4 * (C) Copyright 2011 Netlogic Microsystems Inc.
  5 *
  6 *  Based on ohci-au1xxx.c, and other Linux OHCI 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#include <linux/signal.h>
 15
 16static int ohci_xls_probe_internal(const struct hc_driver *driver,
 17			struct platform_device *dev)
 18{
 19	struct resource *res;
 20	struct usb_hcd *hcd;
 21	int retval, irq;
 22
 23	/* Get our IRQ from an earlier registered Platform Resource */
 24	irq = platform_get_irq(dev, 0);
 25	if (irq < 0) {
 26		dev_err(&dev->dev, "Found HC with no IRQ\n");
 27		return -ENODEV;
 28	}
 29
 30	/* Get our Memory Handle */
 31	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
 32	if (!res) {
 33		dev_err(&dev->dev, "MMIO Handle incorrect!\n");
 34		return -ENODEV;
 35	}
 36
 37	hcd = usb_create_hcd(driver, &dev->dev, "XLS");
 38	if (!hcd) {
 39		retval = -ENOMEM;
 40		goto err1;
 41	}
 42	hcd->rsrc_start = res->start;
 43	hcd->rsrc_len = resource_size(res);
 44
 45	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 46			driver->description)) {
 47		dev_dbg(&dev->dev, "Controller already in use\n");
 48		retval = -EBUSY;
 49		goto err2;
 50	}
 51
 52	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 53	if (hcd->regs == NULL) {
 54		dev_dbg(&dev->dev, "error mapping memory\n");
 55		retval = -EFAULT;
 56		goto err3;
 57	}
 58
 59	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
 60	if (retval != 0)
 61		goto err4;
 62	return retval;
 63
 64err4:
 65	iounmap(hcd->regs);
 66err3:
 67	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 68err2:
 69	usb_put_hcd(hcd);
 70err1:
 71	dev_err(&dev->dev, "init fail, %d\n", retval);
 72	return retval;
 73}
 74
 75static int ohci_xls_reset(struct usb_hcd *hcd)
 76{
 77	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
 78
 79	ohci_hcd_init(ohci);
 80	return ohci_init(ohci);
 81}
 82
 83static int __devinit ohci_xls_start(struct usb_hcd *hcd)
 84{
 85	struct ohci_hcd *ohci;
 86	int ret;
 87
 88	ohci = hcd_to_ohci(hcd);
 89	ret = ohci_run(ohci);
 90	if (ret < 0) {
 91		dev_err(hcd->self.controller, "can't start %s\n",
 92			hcd->self.bus_name);
 93		ohci_stop(hcd);
 94		return ret;
 95	}
 96	return 0;
 97}
 98
 99static struct hc_driver ohci_xls_hc_driver = {
100	.description	= hcd_name,
101	.product_desc	= "XLS OHCI Host Controller",
102	.hcd_priv_size	= sizeof(struct ohci_hcd),
103	.irq		= ohci_irq,
104	.flags		= HCD_MEMORY | HCD_USB11,
105	.reset		= ohci_xls_reset,
106	.start		= ohci_xls_start,
107	.stop		= ohci_stop,
108	.shutdown	= ohci_shutdown,
109	.urb_enqueue	= ohci_urb_enqueue,
110	.urb_dequeue	= ohci_urb_dequeue,
111	.endpoint_disable = ohci_endpoint_disable,
112	.get_frame_number = ohci_get_frame,
113	.hub_status_data = ohci_hub_status_data,
114	.hub_control	= ohci_hub_control,
115#ifdef CONFIG_PM
116	.bus_suspend	= ohci_bus_suspend,
117	.bus_resume	= ohci_bus_resume,
118#endif
119	.start_port_reset = ohci_start_port_reset,
120};
121
122static int ohci_xls_probe(struct platform_device *dev)
123{
124	int ret;
125
126	pr_debug("In ohci_xls_probe");
127	if (usb_disabled())
128		return -ENODEV;
129	ret = ohci_xls_probe_internal(&ohci_xls_hc_driver, dev);
130	return ret;
131}
132
133static int ohci_xls_remove(struct platform_device *dev)
134{
135	struct usb_hcd *hcd = platform_get_drvdata(dev);
136
137	usb_remove_hcd(hcd);
138	iounmap(hcd->regs);
139	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
140	usb_put_hcd(hcd);
141	return 0;
142}
143
144static struct platform_driver ohci_xls_driver = {
145	.probe		= ohci_xls_probe,
146	.remove		= ohci_xls_remove,
147	.shutdown	= usb_hcd_platform_shutdown,
148	.driver		= {
149		.name	= "ohci-xls-0",
150		.owner	= THIS_MODULE,
151	},
152};