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 *
  8 * Bus Glue for AMD Alchemy Au1xxx
  9 *
 10 * Written by Christopher Hoover <ch@hpl.hp.com>
 11 * Based on fragments of previous driver by Russell King et al.
 12 *
 13 * Modified for LH7A404 from ohci-sa1111.c
 14 *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
 15 * Modified for AMD Alchemy Au1xxx
 16 *  by Matt Porter <mporter@kernel.crashing.org>
 17 *
 18 * This file is licenced under the GPL.
 19 */
 20
 21#include <linux/platform_device.h>
 22#include <linux/signal.h>
 23
 24#include <asm/mach-au1x00/au1000.h>
 25
 26
 27extern int usb_disabled(void);
 28
 29static int __devinit ohci_au1xxx_start(struct usb_hcd *hcd)
 30{
 31	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
 32	int ret;
 33
 34	ohci_dbg(ohci, "ohci_au1xxx_start, ohci:%p", ohci);
 35
 36	if ((ret = ohci_init(ohci)) < 0)
 37		return ret;
 38
 39	if ((ret = ohci_run(ohci)) < 0) {
 40		dev_err(hcd->self.controller, "can't start %s",
 41			hcd->self.bus_name);
 42		ohci_stop(hcd);
 43		return ret;
 44	}
 45
 46	return 0;
 47}
 48
 49static const struct hc_driver ohci_au1xxx_hc_driver = {
 50	.description =		hcd_name,
 51	.product_desc =		"Au1xxx OHCI",
 52	.hcd_priv_size =	sizeof(struct ohci_hcd),
 53
 54	/*
 55	 * generic hardware linkage
 56	 */
 57	.irq =			ohci_irq,
 58	.flags =		HCD_USB11 | HCD_MEMORY,
 59
 60	/*
 61	 * basic lifecycle operations
 62	 */
 63	.start =		ohci_au1xxx_start,
 64	.stop =			ohci_stop,
 65	.shutdown =		ohci_shutdown,
 66
 67	/*
 68	 * managing i/o requests and associated device resources
 69	 */
 70	.urb_enqueue =		ohci_urb_enqueue,
 71	.urb_dequeue =		ohci_urb_dequeue,
 72	.endpoint_disable =	ohci_endpoint_disable,
 73
 74	/*
 75	 * scheduling support
 76	 */
 77	.get_frame_number =	ohci_get_frame,
 78
 79	/*
 80	 * root hub support
 81	 */
 82	.hub_status_data =	ohci_hub_status_data,
 83	.hub_control =		ohci_hub_control,
 84#ifdef	CONFIG_PM
 85	.bus_suspend =		ohci_bus_suspend,
 86	.bus_resume =		ohci_bus_resume,
 87#endif
 88	.start_port_reset =	ohci_start_port_reset,
 89};
 90
 91static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
 92{
 93	int ret, unit;
 94	struct usb_hcd *hcd;
 95
 96	if (usb_disabled())
 97		return -ENODEV;
 98
 99	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
100		pr_debug("resource[1] is not IORESOURCE_IRQ\n");
101		return -ENOMEM;
102	}
103
104	hcd = usb_create_hcd(&ohci_au1xxx_hc_driver, &pdev->dev, "au1xxx");
105	if (!hcd)
106		return -ENOMEM;
107
108	hcd->rsrc_start = pdev->resource[0].start;
109	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
110
111	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
112		pr_debug("request_mem_region failed\n");
113		ret = -EBUSY;
114		goto err1;
115	}
116
117	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
118	if (!hcd->regs) {
119		pr_debug("ioremap failed\n");
120		ret = -ENOMEM;
121		goto err2;
122	}
123
124	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
125			ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
126	if (alchemy_usb_control(unit, 1)) {
127		printk(KERN_INFO "%s: controller init failed!\n", pdev->name);
128		ret = -ENODEV;
129		goto err3;
130	}
131
132	ohci_hcd_init(hcd_to_ohci(hcd));
133
134	ret = usb_add_hcd(hcd, pdev->resource[1].start,
135			  IRQF_SHARED);
136	if (ret == 0) {
137		platform_set_drvdata(pdev, hcd);
138		return ret;
139	}
140
141	alchemy_usb_control(unit, 0);
142err3:
143	iounmap(hcd->regs);
144err2:
145	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
146err1:
147	usb_put_hcd(hcd);
148	return ret;
149}
150
151static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
152{
153	struct usb_hcd *hcd = platform_get_drvdata(pdev);
154	int unit;
155
156	unit = (hcd->rsrc_start == AU1300_USB_OHCI1_PHYS_ADDR) ?
157			ALCHEMY_USB_OHCI1 : ALCHEMY_USB_OHCI0;
158	usb_remove_hcd(hcd);
159	alchemy_usb_control(unit, 0);
160	iounmap(hcd->regs);
161	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
162	usb_put_hcd(hcd);
163	platform_set_drvdata(pdev, NULL);
164
165	return 0;
166}
167
168#ifdef CONFIG_PM
169static int ohci_hcd_au1xxx_drv_suspend(struct device *dev)
170{
171	struct usb_hcd *hcd = dev_get_drvdata(dev);
172	struct ohci_hcd	*ohci = hcd_to_ohci(hcd);
173	unsigned long flags;
174	int rc;
175
176	rc = 0;
177
178	/* Root hub was already suspended. Disable irq emission and
179	 * mark HW unaccessible, bail out if RH has been resumed. Use
180	 * the spinlock to properly synchronize with possible pending
181	 * RH suspend or resume activity.
182	 */
183	spin_lock_irqsave(&ohci->lock, flags);
184	if (ohci->rh_state != OHCI_RH_SUSPENDED) {
185		rc = -EINVAL;
186		goto bail;
187	}
188	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
189	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
190
191	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
192
193	alchemy_usb_control(ALCHEMY_USB_OHCI0, 0);
194bail:
195	spin_unlock_irqrestore(&ohci->lock, flags);
196
197	return rc;
198}
199
200static int ohci_hcd_au1xxx_drv_resume(struct device *dev)
201{
202	struct usb_hcd *hcd = dev_get_drvdata(dev);
203
204	alchemy_usb_control(ALCHEMY_USB_OHCI0, 1);
205
206	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
207	ohci_finish_controller_resume(hcd);
208
209	return 0;
210}
211
212static const struct dev_pm_ops au1xxx_ohci_pmops = {
213	.suspend	= ohci_hcd_au1xxx_drv_suspend,
214	.resume		= ohci_hcd_au1xxx_drv_resume,
215};
216
217#define AU1XXX_OHCI_PMOPS &au1xxx_ohci_pmops
218
219#else
220#define AU1XXX_OHCI_PMOPS NULL
221#endif
222
223static struct platform_driver ohci_hcd_au1xxx_driver = {
224	.probe		= ohci_hcd_au1xxx_drv_probe,
225	.remove		= ohci_hcd_au1xxx_drv_remove,
226	.shutdown	= usb_hcd_platform_shutdown,
227	.driver		= {
228		.name	= "au1xxx-ohci",
229		.owner	= THIS_MODULE,
230		.pm	= AU1XXX_OHCI_PMOPS,
231	},
232};
233
234MODULE_ALIAS("platform:au1xxx-ohci");