ohci-pxa27x.c revision 2e1dcc1600c1d83b26479edd076866595bbd3523 
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 pxa27x
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 *
16 * Modified for pxa27x from ohci-lh7a404.c
17 *  by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
18 *
19 * This file is licenced under the GPL.
20 */
21
22#include <linux/device.h>
23#include <linux/signal.h>
24#include <linux/platform_device.h>
25
26#include <asm/mach-types.h>
27#include <asm/hardware.h>
28#include <asm/arch/pxa-regs.h>
29#include <asm/arch/ohci.h>
30
31#define PXA_UHC_MAX_PORTNUM    3
32
33#define UHCRHPS(x)              __REG2( 0x4C000050, (x)<<2 )
34
35/*
36  PMM_NPS_MODE -- PMM Non-power switching mode
37      Ports are powered continuously.
38
39  PMM_GLOBAL_MODE -- PMM global switching mode
40      All ports are powered at the same time.
41
42  PMM_PERPORT_MODE -- PMM per port switching mode
43      Ports are powered individually.
44 */
45static int pxa27x_ohci_select_pmm( int mode )
46{
47	switch ( mode ) {
48	case PMM_NPS_MODE:
49		UHCRHDA |= RH_A_NPS;
50		break;
51	case PMM_GLOBAL_MODE:
52		UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
53		break;
54	case PMM_PERPORT_MODE:
55		UHCRHDA &= ~(RH_A_NPS);
56		UHCRHDA |= RH_A_PSM;
57
58		/* Set port power control mask bits, only 3 ports. */
59		UHCRHDB |= (0x7<<17);
60		break;
61	default:
62		printk( KERN_ERR
63			"Invalid mode %d, set to non-power switch mode.\n",
64			mode );
65
66		UHCRHDA |= RH_A_NPS;
67	}
68
69	return 0;
70}
71
72extern int usb_disabled(void);
73
74/*-------------------------------------------------------------------------*/
75
76static int pxa27x_start_hc(struct device *dev)
77{
78	int retval = 0;
79	struct pxaohci_platform_data *inf;
80
81	inf = dev->platform_data;
82
83	pxa_set_cken(CKEN10_USBHOST, 1);
84
85	UHCHR |= UHCHR_FHR;
86	udelay(11);
87	UHCHR &= ~UHCHR_FHR;
88
89	UHCHR |= UHCHR_FSBIR;
90	while (UHCHR & UHCHR_FSBIR)
91		cpu_relax();
92
93	if (inf->init)
94		retval = inf->init(dev);
95
96	if (retval < 0)
97		return retval;
98
99	UHCHR &= ~UHCHR_SSE;
100
101	UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
102
103	/* Clear any OTG Pin Hold */
104	if (PSSR & PSSR_OTGPH)
105		PSSR |= PSSR_OTGPH;
106
107	return 0;
108}
109
110static void pxa27x_stop_hc(struct device *dev)
111{
112	struct pxaohci_platform_data *inf;
113
114	inf = dev->platform_data;
115
116	if (inf->exit)
117		inf->exit(dev);
118
119	UHCHR |= UHCHR_FHR;
120	udelay(11);
121	UHCHR &= ~UHCHR_FHR;
122
123	UHCCOMS |= 1;
124	udelay(10);
125
126	pxa_set_cken(CKEN10_USBHOST, 0);
127}
128
129
130/*-------------------------------------------------------------------------*/
131
132/* configure so an HC device and id are always provided */
133/* always called with process context; sleeping is OK */
134
135
136/**
137 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
138 * Context: !in_interrupt()
139 *
140 * Allocates basic resources for this USB host controller, and
141 * then invokes the start() method for the HCD associated with it
142 * through the hotplug entry's driver_data.
143 *
144 */
145int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
146{
147	int retval;
148	struct usb_hcd *hcd;
149	struct pxaohci_platform_data *inf;
150
151	inf = pdev->dev.platform_data;
152
153	if (!inf)
154		return -ENODEV;
155
156	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
157		pr_debug ("resource[1] is not IORESOURCE_IRQ");
158		return -ENOMEM;
159	}
160
161	hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
162	if (!hcd)
163		return -ENOMEM;
164	hcd->rsrc_start = pdev->resource[0].start;
165	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
166
167	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
168		pr_debug("request_mem_region failed");
169		retval = -EBUSY;
170		goto err1;
171	}
172
173	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
174	if (!hcd->regs) {
175		pr_debug("ioremap failed");
176		retval = -ENOMEM;
177		goto err2;
178	}
179
180	if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) {
181		pr_debug("pxa27x_start_hc failed");
182		goto err3;
183	}
184
185	/* Select Power Management Mode */
186	pxa27x_ohci_select_pmm(inf->port_mode);
187
188	ohci_hcd_init(hcd_to_ohci(hcd));
189
190	retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
191	if (retval == 0)
192		return retval;
193
194	pxa27x_stop_hc(&pdev->dev);
195 err3:
196	iounmap(hcd->regs);
197 err2:
198	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199 err1:
200	usb_put_hcd(hcd);
201	return retval;
202}
203
204
205/* may be called without controller electrically present */
206/* may be called with controller, bus, and devices active */
207
208/**
209 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
210 * @dev: USB Host Controller being removed
211 * Context: !in_interrupt()
212 *
213 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
214 * the HCD's stop() method.  It is always called from a thread
215 * context, normally "rmmod", "apmd", or something similar.
216 *
217 */
218void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
219{
220	usb_remove_hcd(hcd);
221	pxa27x_stop_hc(&pdev->dev);
222	iounmap(hcd->regs);
223	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
224	usb_put_hcd(hcd);
225}
226
227/*-------------------------------------------------------------------------*/
228
229static int __devinit
230ohci_pxa27x_start (struct usb_hcd *hcd)
231{
232	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
233	int		ret;
234
235	ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
236
237	/* The value of NDP in roothub_a is incorrect on this hardware */
238	ohci->num_ports = 3;
239
240	if ((ret = ohci_init(ohci)) < 0)
241		return ret;
242
243	if ((ret = ohci_run (ohci)) < 0) {
244		err ("can't start %s", hcd->self.bus_name);
245		ohci_stop (hcd);
246		return ret;
247	}
248
249	return 0;
250}
251
252/*-------------------------------------------------------------------------*/
253
254static const struct hc_driver ohci_pxa27x_hc_driver = {
255	.description =		hcd_name,
256	.product_desc =		"PXA27x OHCI",
257	.hcd_priv_size =	sizeof(struct ohci_hcd),
258
259	/*
260	 * generic hardware linkage
261	 */
262	.irq =			ohci_irq,
263	.flags =		HCD_USB11 | HCD_MEMORY,
264
265	/*
266	 * basic lifecycle operations
267	 */
268	.start =		ohci_pxa27x_start,
269	.stop =			ohci_stop,
270
271	/*
272	 * managing i/o requests and associated device resources
273	 */
274	.urb_enqueue =		ohci_urb_enqueue,
275	.urb_dequeue =		ohci_urb_dequeue,
276	.endpoint_disable =	ohci_endpoint_disable,
277
278	/*
279	 * scheduling support
280	 */
281	.get_frame_number =	ohci_get_frame,
282
283	/*
284	 * root hub support
285	 */
286	.hub_status_data =	ohci_hub_status_data,
287	.hub_control =		ohci_hub_control,
288#ifdef  CONFIG_PM
289	.bus_suspend =		ohci_bus_suspend,
290	.bus_resume =		ohci_bus_resume,
291#endif
292	.start_port_reset =	ohci_start_port_reset,
293};
294
295/*-------------------------------------------------------------------------*/
296
297static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
298{
299	pr_debug ("In ohci_hcd_pxa27x_drv_probe");
300
301	if (usb_disabled())
302		return -ENODEV;
303
304	return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
305}
306
307static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
308{
309	struct usb_hcd *hcd = platform_get_drvdata(pdev);
310
311	usb_hcd_pxa27x_remove(hcd, pdev);
312	return 0;
313}
314
315#ifdef	CONFIG_PM
316static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state)
317{
318	struct ohci_hcd *ohci = platform_get_drvdata(pdev);
319
320	if (time_before(jiffies, ohci->next_statechange))
321		msleep(5);
322	ohci->next_statechange = jiffies;
323
324	pxa27x_stop_hc(&pdev->dev);
325	ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
326	pdev->dev.power.power_state = PMSG_SUSPEND;
327
328	return 0;
329}
330
331static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev)
332{
333	struct ohci_hcd	*ohci = platform_get_drvdata(pdev);
334	int status;
335
336	if (time_before(jiffies, ohci->next_statechange))
337		msleep(5);
338	ohci->next_statechange = jiffies;
339
340	if ((status = pxa27x_start_hc(&pdev->dev)) < 0)
341		return status;
342
343	pdev->dev.power.power_state = PMSG_ON;
344	usb_hcd_resume_root_hub(platform_get_drvdata(pdev));
345
346	return 0;
347}
348#endif
349
350
351static struct platform_driver ohci_hcd_pxa27x_driver = {
352	.probe		= ohci_hcd_pxa27x_drv_probe,
353	.remove		= ohci_hcd_pxa27x_drv_remove,
354#ifdef CONFIG_PM
355	.suspend	= ohci_hcd_pxa27x_drv_suspend,
356	.resume		= ohci_hcd_pxa27x_drv_resume,
357#endif
358	.driver		= {
359		.name	= "pxa27x-ohci",
360	},
361};
362
363static int __init ohci_hcd_pxa27x_init (void)
364{
365	pr_debug (DRIVER_INFO " (pxa27x)");
366	pr_debug ("block sizes: ed %d td %d\n",
367		sizeof (struct ed), sizeof (struct td));
368
369	return platform_driver_register(&ohci_hcd_pxa27x_driver);
370}
371
372static void __exit ohci_hcd_pxa27x_cleanup (void)
373{
374	platform_driver_unregister(&ohci_hcd_pxa27x_driver);
375}
376
377module_init (ohci_hcd_pxa27x_init);
378module_exit (ohci_hcd_pxa27x_cleanup);
379