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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Tim Schmielau4e57b682005-10-30 15:03:48 -080023#include <linux/signal.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010024#include <linux/platform_device.h>
Linus Torvalds4fd5f822005-10-31 07:32:56 -080025
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <asm/mach-types.h>
27#include <asm/hardware.h>
28#include <asm/arch/pxa-regs.h>
29
30
31#define PMM_NPS_MODE 1
32#define PMM_GLOBAL_MODE 2
33#define PMM_PERPORT_MODE 3
34
35#define PXA_UHC_MAX_PORTNUM 3
36
37#define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 )
38
39static int pxa27x_ohci_pmm_state;
40
41/*
42 PMM_NPS_MODE -- PMM Non-power switching mode
43 Ports are powered continuously.
44
45 PMM_GLOBAL_MODE -- PMM global switching mode
46 All ports are powered at the same time.
47
48 PMM_PERPORT_MODE -- PMM per port switching mode
49 Ports are powered individually.
50 */
51static int pxa27x_ohci_select_pmm( int mode )
52{
53 pxa27x_ohci_pmm_state = mode;
54
55 switch ( mode ) {
56 case PMM_NPS_MODE:
57 UHCRHDA |= RH_A_NPS;
58 break;
59 case PMM_GLOBAL_MODE:
60 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM);
61 break;
62 case PMM_PERPORT_MODE:
63 UHCRHDA &= ~(RH_A_NPS);
64 UHCRHDA |= RH_A_PSM;
65
66 /* Set port power control mask bits, only 3 ports. */
67 UHCRHDB |= (0x7<<17);
68 break;
69 default:
70 printk( KERN_ERR
71 "Invalid mode %d, set to non-power switch mode.\n",
72 mode );
73
74 pxa27x_ohci_pmm_state = PMM_NPS_MODE;
75 UHCRHDA |= RH_A_NPS;
76 }
77
78 return 0;
79}
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081extern int usb_disabled(void);
82
83/*-------------------------------------------------------------------------*/
84
85static void pxa27x_start_hc(struct platform_device *dev)
86{
87 pxa_set_cken(CKEN10_USBHOST, 1);
88
89 UHCHR |= UHCHR_FHR;
90 udelay(11);
91 UHCHR &= ~UHCHR_FHR;
92
93 UHCHR |= UHCHR_FSBIR;
94 while (UHCHR & UHCHR_FSBIR)
95 cpu_relax();
96
97 /* This could be properly abstracted away through the
98 device data the day more machines are supported and
99 their differences can be figured out correctly. */
100 if (machine_is_mainstone()) {
101 /* setup Port1 GPIO pin. */
102 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */
103 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
104
105 /* Set the Power Control Polarity Low and Power Sense
106 Polarity Low to active low. Supply power to USB ports. */
107 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
108 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
David Brownell155faf52005-08-31 11:54:09 -0700109
110 pxa27x_ohci_pmm_state = PMM_PERPORT_MODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112
113 UHCHR &= ~UHCHR_SSE;
114
115 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE);
David Brownell155faf52005-08-31 11:54:09 -0700116
117 /* Clear any OTG Pin Hold */
118 if (PSSR & PSSR_OTGPH)
119 PSSR |= PSSR_OTGPH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120}
121
122static void pxa27x_stop_hc(struct platform_device *dev)
123{
124 UHCHR |= UHCHR_FHR;
125 udelay(11);
126 UHCHR &= ~UHCHR_FHR;
127
128 UHCCOMS |= 1;
129 udelay(10);
130
131 pxa_set_cken(CKEN10_USBHOST, 0);
132}
133
134
135/*-------------------------------------------------------------------------*/
136
137/* configure so an HC device and id are always provided */
138/* always called with process context; sleeping is OK */
139
140
141/**
142 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs
143 * Context: !in_interrupt()
144 *
145 * Allocates basic resources for this USB host controller, and
146 * then invokes the start() method for the HCD associated with it
147 * through the hotplug entry's driver_data.
148 *
149 */
150int usb_hcd_pxa27x_probe (const struct hc_driver *driver,
151 struct platform_device *dev)
152{
153 int retval;
154 struct usb_hcd *hcd;
155
156 if (dev->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, &dev->dev, "pxa27x");
162 if (!hcd)
163 return -ENOMEM;
164 hcd->rsrc_start = dev->resource[0].start;
165 hcd->rsrc_len = dev->resource[0].end - dev->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 pxa27x_start_hc(dev);
181
182 /* Select Power Management Mode */
David Brownell155faf52005-08-31 11:54:09 -0700183 pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185 ohci_hcd_init(hcd_to_ohci(hcd));
186
187 retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
188 if (retval == 0)
189 return retval;
190
191 pxa27x_stop_hc(dev);
192 iounmap(hcd->regs);
193 err2:
194 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
195 err1:
196 usb_put_hcd(hcd);
197 return retval;
198}
199
200
201/* may be called without controller electrically present */
202/* may be called with controller, bus, and devices active */
203
204/**
205 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs
206 * @dev: USB Host Controller being removed
207 * Context: !in_interrupt()
208 *
209 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking
210 * the HCD's stop() method. It is always called from a thread
211 * context, normally "rmmod", "apmd", or something similar.
212 *
213 */
214void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev)
215{
216 usb_remove_hcd(hcd);
217 pxa27x_stop_hc(dev);
218 iounmap(hcd->regs);
219 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
220 usb_put_hcd(hcd);
221}
222
223/*-------------------------------------------------------------------------*/
224
225static int __devinit
226ohci_pxa27x_start (struct usb_hcd *hcd)
227{
228 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
229 int ret;
230
231 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci);
232
David Brownellfdd13b32005-08-31 11:52:57 -0700233 /* The value of NDP in roothub_a is incorrect on this hardware */
234 ohci->num_ports = 3;
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 if ((ret = ohci_init(ohci)) < 0)
237 return ret;
238
239 if ((ret = ohci_run (ohci)) < 0) {
240 err ("can't start %s", hcd->self.bus_name);
241 ohci_stop (hcd);
242 return ret;
243 }
244
245 return 0;
246}
247
248/*-------------------------------------------------------------------------*/
249
250static const struct hc_driver ohci_pxa27x_hc_driver = {
251 .description = hcd_name,
252 .product_desc = "PXA27x OHCI",
253 .hcd_priv_size = sizeof(struct ohci_hcd),
254
255 /*
256 * generic hardware linkage
257 */
258 .irq = ohci_irq,
259 .flags = HCD_USB11 | HCD_MEMORY,
260
261 /*
262 * basic lifecycle operations
263 */
264 .start = ohci_pxa27x_start,
265 .stop = ohci_stop,
266
267 /*
268 * managing i/o requests and associated device resources
269 */
270 .urb_enqueue = ohci_urb_enqueue,
271 .urb_dequeue = ohci_urb_dequeue,
272 .endpoint_disable = ohci_endpoint_disable,
273
274 /*
275 * scheduling support
276 */
277 .get_frame_number = ohci_get_frame,
278
279 /*
280 * root hub support
281 */
282 .hub_status_data = ohci_hub_status_data,
283 .hub_control = ohci_hub_control,
David Brownell8ad7fe12005-09-13 19:59:11 -0700284#ifdef CONFIG_PM
Alan Stern0c0382e2005-10-13 17:08:02 -0400285 .bus_suspend = ohci_bus_suspend,
286 .bus_resume = ohci_bus_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287#endif
David Brownell92936772005-09-22 22:32:11 -0700288 .start_port_reset = ohci_start_port_reset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289};
290
291/*-------------------------------------------------------------------------*/
292
293static int ohci_hcd_pxa27x_drv_probe(struct device *dev)
294{
295 struct platform_device *pdev = to_platform_device(dev);
296 int ret;
297
298 pr_debug ("In ohci_hcd_pxa27x_drv_probe");
299
300 if (usb_disabled())
301 return -ENODEV;
302
303 ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
304 return ret;
305}
306
307static int ohci_hcd_pxa27x_drv_remove(struct device *dev)
308{
309 struct platform_device *pdev = to_platform_device(dev);
310 struct usb_hcd *hcd = dev_get_drvdata(dev);
311
312 usb_hcd_pxa27x_remove(hcd, pdev);
313 return 0;
314}
315
Russell King9480e302005-10-28 09:52:56 -0700316static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317{
318// struct platform_device *pdev = to_platform_device(dev);
319// struct usb_hcd *hcd = dev_get_drvdata(dev);
320 printk("%s: not implemented yet\n", __FUNCTION__);
321
322 return 0;
323}
324
Russell King9480e302005-10-28 09:52:56 -0700325static int ohci_hcd_pxa27x_drv_resume(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
327// struct platform_device *pdev = to_platform_device(dev);
328// struct usb_hcd *hcd = dev_get_drvdata(dev);
329 printk("%s: not implemented yet\n", __FUNCTION__);
330
331 return 0;
332}
333
334
335static struct device_driver ohci_hcd_pxa27x_driver = {
336 .name = "pxa27x-ohci",
337 .bus = &platform_bus_type,
338 .probe = ohci_hcd_pxa27x_drv_probe,
339 .remove = ohci_hcd_pxa27x_drv_remove,
340 .suspend = ohci_hcd_pxa27x_drv_suspend,
341 .resume = ohci_hcd_pxa27x_drv_resume,
342};
343
344static int __init ohci_hcd_pxa27x_init (void)
345{
346 pr_debug (DRIVER_INFO " (pxa27x)");
347 pr_debug ("block sizes: ed %d td %d\n",
348 sizeof (struct ed), sizeof (struct td));
349
350 return driver_register(&ohci_hcd_pxa27x_driver);
351}
352
353static void __exit ohci_hcd_pxa27x_cleanup (void)
354{
355 driver_unregister(&ohci_hcd_pxa27x_driver);
356}
357
358module_init (ohci_hcd_pxa27x_init);
359module_exit (ohci_hcd_pxa27x_cleanup);