1/*
  2 * OHCI HCD (Host Controller Driver) for USB.
  3 *
  4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
  5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
  6 * (C) Copyright 2002 Hewlett-Packard Company
  7 * (C) Copyright 2003-2005 MontaVista Software Inc.
  8 *
  9 * Bus Glue for PPC On-Chip OHCI driver
 10 * Tested on Freescale MPC5200 and IBM STB04xxx
 11 *
 12 * Modified by Dale Farnsworth <dale@farnsworth.org> from ohci-sa1111.c
 13 *
 14 * This file is licenced under the GPL.
 15 */
 16
 17#include <linux/platform_device.h>
 18#include <linux/signal.h>
 19
 20/* configure so an HC device and id are always provided */
 21/* always called with process context; sleeping is OK */
 22
 23/**
 24 * usb_hcd_ppc_soc_probe - initialize On-Chip HCDs
 25 * Context: !in_interrupt()
 26 *
 27 * Allocates basic resources for this USB host controller.
 28 *
 29 * Store this function in the HCD's struct pci_driver as probe().
 30 */
 31static int usb_hcd_ppc_soc_probe(const struct hc_driver *driver,
 32			  struct platform_device *pdev)
 33{
 34	int retval;
 35	struct usb_hcd *hcd;
 36	struct ohci_hcd	*ohci;
 37	struct resource *res;
 38	int irq;
 39
 40	pr_debug("initializing PPC-SOC USB Controller\n");
 41
 42	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 43	if (!res) {
 44		pr_debug("%s: no irq\n", __FILE__);
 45		return -ENODEV;
 46	}
 47	irq = res->start;
 48
 49	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 50	if (!res) {
 51		pr_debug("%s: no reg addr\n", __FILE__);
 52		return -ENODEV;
 53	}
 54
 55	hcd = usb_create_hcd(driver, &pdev->dev, "PPC-SOC USB");
 56	if (!hcd)
 57		return -ENOMEM;
 58	hcd->rsrc_start = res->start;
 59	hcd->rsrc_len = resource_size(res);
 60
 61	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 62		pr_debug("%s: request_mem_region failed\n", __FILE__);
 63		retval = -EBUSY;
 64		goto err1;
 65	}
 66
 67	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 68	if (!hcd->regs) {
 69		pr_debug("%s: ioremap failed\n", __FILE__);
 70		retval = -ENOMEM;
 71		goto err2;
 72	}
 73
 74	ohci = hcd_to_ohci(hcd);
 75	ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
 76
 77#ifdef CONFIG_PPC_MPC52xx
 78	/* MPC52xx doesn't need frame_no shift */
 79	ohci->flags |= OHCI_QUIRK_FRAME_NO;
 80#endif
 81	ohci_hcd_init(ohci);
 82
 83	retval = usb_add_hcd(hcd, irq, IRQF_DISABLED);
 84	if (retval == 0)
 85		return retval;
 86
 87	pr_debug("Removing PPC-SOC USB Controller\n");
 88
 89	iounmap(hcd->regs);
 90 err2:
 91	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 92 err1:
 93	usb_put_hcd(hcd);
 94	return retval;
 95}
 96
 97
 98/* may be called without controller electrically present */
 99/* may be called with controller, bus, and devices active */
100
101/**
102 * usb_hcd_ppc_soc_remove - shutdown processing for On-Chip HCDs
103 * @pdev: USB Host Controller being removed
104 * Context: !in_interrupt()
105 *
106 * Reverses the effect of usb_hcd_ppc_soc_probe().
107 * It is always called from a thread
108 * context, normally "rmmod", "apmd", or something similar.
109 *
110 */
111static void usb_hcd_ppc_soc_remove(struct usb_hcd *hcd,
112		struct platform_device *pdev)
113{
114	usb_remove_hcd(hcd);
115
116	pr_debug("stopping PPC-SOC USB Controller\n");
117
118	iounmap(hcd->regs);
119	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
120	usb_put_hcd(hcd);
121}
122
123static int __devinit
124ohci_ppc_soc_start(struct usb_hcd *hcd)
125{
126	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
127	int		ret;
128
129	if ((ret = ohci_init(ohci)) < 0)
130		return ret;
131
132	if ((ret = ohci_run(ohci)) < 0) {
133		err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
134		ohci_stop(hcd);
135		return ret;
136	}
137
138	return 0;
139}
140
141static const struct hc_driver ohci_ppc_soc_hc_driver = {
142	.description =		hcd_name,
143	.hcd_priv_size =	sizeof(struct ohci_hcd),
144
145	/*
146	 * generic hardware linkage
147	 */
148	.irq =			ohci_irq,
149	.flags =		HCD_USB11 | HCD_MEMORY,
150
151	/*
152	 * basic lifecycle operations
153	 */
154	.start =		ohci_ppc_soc_start,
155	.stop =			ohci_stop,
156	.shutdown =		ohci_shutdown,
157
158	/*
159	 * managing i/o requests and associated device resources
160	 */
161	.urb_enqueue =		ohci_urb_enqueue,
162	.urb_dequeue =		ohci_urb_dequeue,
163	.endpoint_disable =	ohci_endpoint_disable,
164
165	/*
166	 * scheduling support
167	 */
168	.get_frame_number =	ohci_get_frame,
169
170	/*
171	 * root hub support
172	 */
173	.hub_status_data =	ohci_hub_status_data,
174	.hub_control =		ohci_hub_control,
175#ifdef	CONFIG_PM
176	.bus_suspend =		ohci_bus_suspend,
177	.bus_resume =		ohci_bus_resume,
178#endif
179	.start_port_reset =	ohci_start_port_reset,
180};
181
182static int ohci_hcd_ppc_soc_drv_probe(struct platform_device *pdev)
183{
184	int ret;
185
186	if (usb_disabled())
187		return -ENODEV;
188
189	ret = usb_hcd_ppc_soc_probe(&ohci_ppc_soc_hc_driver, pdev);
190	return ret;
191}
192
193static int ohci_hcd_ppc_soc_drv_remove(struct platform_device *pdev)
194{
195	struct usb_hcd *hcd = platform_get_drvdata(pdev);
196
197	usb_hcd_ppc_soc_remove(hcd, pdev);
198	return 0;
199}
200
201static struct platform_driver ohci_hcd_ppc_soc_driver = {
202	.probe		= ohci_hcd_ppc_soc_drv_probe,
203	.remove		= ohci_hcd_ppc_soc_drv_remove,
204	.shutdown	= usb_hcd_platform_shutdown,
205#ifdef	CONFIG_PM
206	/*.suspend	= ohci_hcd_ppc_soc_drv_suspend,*/
207	/*.resume	= ohci_hcd_ppc_soc_drv_resume,*/
208#endif
209	.driver		= {
210		.name	= "ppc-soc-ohci",
211		.owner	= THIS_MODULE,
212	},
213};
214
215MODULE_ALIAS("platform:ppc-soc-ohci");