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sfc: Don't use enums as a bitmask.
[zen-stable.git] / drivers / usb / musb / omap2430.c
blob25cb8b0003b152c751087251a593c39e482c326e
1 /*
2 * Copyright (C) 2005-2007 by Texas Instruments
3 * Some code has been taken from tusb6010.c
4 * Copyrights for that are attributable to:
5 * Copyright (C) 2006 Nokia Corporation
6 * Tony Lindgren <tony@atomide.com>
7 *
8 * This file is part of the Inventra Controller Driver for Linux.
9 *
10 * The Inventra Controller Driver for Linux is free software; you
11 * can redistribute it and/or modify it under the terms of the GNU
12 * General Public License version 2 as published by the Free Software
13 * Foundation.
14 *
15 * The Inventra Controller Driver for Linux is distributed in
16 * the hope that it will be useful, but WITHOUT ANY WARRANTY;
17 * without even the implied warranty of MERCHANTABILITY or
18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 * License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with The Inventra Controller Driver for Linux ; if not,
23 * write to the Free Software Foundation, Inc., 59 Temple Place,
24 * Suite 330, Boston, MA 02111-1307 USA
25 *
26 */
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/sched.h>
30 #include <linux/init.h>
31 #include <linux/list.h>
32 #include <linux/clk.h>
33 #include <linux/io.h>
34 #include <linux/platform_device.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/err.h>
38
39 #include "musb_core.h"
40 #include "omap2430.h"
41
42 struct omap2430_glue {
43 struct device *dev;
44 struct platform_device *musb;
45 };
46 #define glue_to_musb(g) platform_get_drvdata(g->musb)
47
48 static struct timer_list musb_idle_timer;
49
50 static void musb_do_idle(unsigned long _musb)
51 {
52 struct musb *musb = (void *)_musb;
53 unsigned long flags;
54 #ifdef CONFIG_USB_MUSB_HDRC_HCD
55 u8 power;
56 #endif
57 u8 devctl;
58
59 spin_lock_irqsave(&musb->lock, flags);
60
61 switch (musb->xceiv->state) {
62 case OTG_STATE_A_WAIT_BCON:
63
64 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
65 if (devctl & MUSB_DEVCTL_BDEVICE) {
66 musb->xceiv->state = OTG_STATE_B_IDLE;
67 MUSB_DEV_MODE(musb);
68 } else {
69 musb->xceiv->state = OTG_STATE_A_IDLE;
70 MUSB_HST_MODE(musb);
71 }
72 break;
73 #ifdef CONFIG_USB_MUSB_HDRC_HCD
74 case OTG_STATE_A_SUSPEND:
75 /* finish RESUME signaling? */
76 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
77 power = musb_readb(musb->mregs, MUSB_POWER);
78 power &= ~MUSB_POWER_RESUME;
79 DBG(1, "root port resume stopped, power %02x\n", power);
80 musb_writeb(musb->mregs, MUSB_POWER, power);
81 musb->is_active = 1;
82 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
83 | MUSB_PORT_STAT_RESUME);
84 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
85 usb_hcd_poll_rh_status(musb_to_hcd(musb));
86 /* NOTE: it might really be A_WAIT_BCON ... */
87 musb->xceiv->state = OTG_STATE_A_HOST;
88 }
89 break;
90 #endif
91 #ifdef CONFIG_USB_MUSB_HDRC_HCD
92 case OTG_STATE_A_HOST:
93 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
94 if (devctl & MUSB_DEVCTL_BDEVICE)
95 musb->xceiv->state = OTG_STATE_B_IDLE;
96 else
97 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
98 #endif
99 default:
100 break;
101 }
102 spin_unlock_irqrestore(&musb->lock, flags);
103 }
104
105
106 static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
107 {
108 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
109 static unsigned long last_timer;
110
111 if (timeout == 0)
112 timeout = default_timeout;
113
114 /* Never idle if active, or when VBUS timeout is not set as host */
115 if (musb->is_active || ((musb->a_wait_bcon == 0)
116 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
117 DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
118 del_timer(&musb_idle_timer);
119 last_timer = jiffies;
120 return;
121 }
122
123 if (time_after(last_timer, timeout)) {
124 if (!timer_pending(&musb_idle_timer))
125 last_timer = timeout;
126 else {
127 DBG(4, "Longer idle timer already pending, ignoring\n");
128 return;
129 }
130 }
131 last_timer = timeout;
132
133 DBG(4, "%s inactive, for idle timer for %lu ms\n",
134 otg_state_string(musb),
135 (unsigned long)jiffies_to_msecs(timeout - jiffies));
136 mod_timer(&musb_idle_timer, timeout);
137 }
138
139 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
140 {
141 u8 devctl;
142 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
143 int ret = 1;
144 /* HDRC controls CPEN, but beware current surges during device
145 * connect. They can trigger transient overcurrent conditions
146 * that must be ignored.
147 */
148
149 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
150
151 if (is_on) {
152 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
153 /* start the session */
154 devctl |= MUSB_DEVCTL_SESSION;
155 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
156 /*
157 * Wait for the musb to set as A device to enable the
158 * VBUS
159 */
160 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
161
162 cpu_relax();
163
164 if (time_after(jiffies, timeout)) {
165 dev_err(musb->controller,
166 "configured as A device timeout");
167 ret = -EINVAL;
168 break;
169 }
170 }
171
172 if (ret && musb->xceiv->set_vbus)
173 otg_set_vbus(musb->xceiv, 1);
174 } else {
175 musb->is_active = 1;
176 musb->xceiv->default_a = 1;
177 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
178 devctl |= MUSB_DEVCTL_SESSION;
179 MUSB_HST_MODE(musb);
180 }
181 } else {
182 musb->is_active = 0;
183
184 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
185 * jumping right to B_IDLE...
186 */
187
188 musb->xceiv->default_a = 0;
189 musb->xceiv->state = OTG_STATE_B_IDLE;
190 devctl &= ~MUSB_DEVCTL_SESSION;
191
192 MUSB_DEV_MODE(musb);
193 }
194 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
195
196 DBG(1, "VBUS %s, devctl %02x "
197 /* otg %3x conf %08x prcm %08x */ "\n",
198 otg_state_string(musb),
199 musb_readb(musb->mregs, MUSB_DEVCTL));
200 }
201
202 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
203 {
204 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
205
206 devctl |= MUSB_DEVCTL_SESSION;
207 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
208
209 return 0;
210 }
211
212 static inline void omap2430_low_level_exit(struct musb *musb)
213 {
214 u32 l;
215
216 /* in any role */
217 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
218 l |= ENABLEFORCE; /* enable MSTANDBY */
219 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
220 }
221
222 static inline void omap2430_low_level_init(struct musb *musb)
223 {
224 u32 l;
225
226 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
227 l &= ~ENABLEFORCE; /* disable MSTANDBY */
228 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
229 }
230
231 /* blocking notifier support */
232 static int musb_otg_notifications(struct notifier_block *nb,
233 unsigned long event, void *unused)
234 {
235 struct musb *musb = container_of(nb, struct musb, nb);
236 struct device *dev = musb->controller;
237 struct musb_hdrc_platform_data *pdata = dev->platform_data;
238 struct omap_musb_board_data *data = pdata->board_data;
239
240 switch (event) {
241 case USB_EVENT_ID:
242 DBG(4, "ID GND\n");
243
244 if (is_otg_enabled(musb)) {
245 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
246 if (musb->gadget_driver) {
247 pm_runtime_get_sync(musb->controller);
248 otg_init(musb->xceiv);
249 omap2430_musb_set_vbus(musb, 1);
250 }
251 #endif
252 } else {
253 pm_runtime_get_sync(musb->controller);
254 otg_init(musb->xceiv);
255 omap2430_musb_set_vbus(musb, 1);
256 }
257 break;
258
259 case USB_EVENT_VBUS:
260 DBG(4, "VBUS Connect\n");
261
262 if (musb->gadget_driver)
263 pm_runtime_get_sync(musb->controller);
264
265 otg_init(musb->xceiv);
266 break;
267
268 case USB_EVENT_NONE:
269 DBG(4, "VBUS Disconnect\n");
270
271 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
272 if (is_otg_enabled(musb))
273 if (musb->gadget_driver)
274 #endif
275 {
276 pm_runtime_mark_last_busy(musb->controller);
277 pm_runtime_put_autosuspend(musb->controller);
278 }
279
280 if (data->interface_type == MUSB_INTERFACE_UTMI) {
281 if (musb->xceiv->set_vbus)
282 otg_set_vbus(musb->xceiv, 0);
283 }
284 otg_shutdown(musb->xceiv);
285 break;
286 default:
287 DBG(4, "ID float\n");
288 return NOTIFY_DONE;
289 }
290
291 return NOTIFY_OK;
292 }
293
294 static int omap2430_musb_init(struct musb *musb)
295 {
296 u32 l, status = 0;
297 struct device *dev = musb->controller;
298 struct musb_hdrc_platform_data *plat = dev->platform_data;
299 struct omap_musb_board_data *data = plat->board_data;
300
301 /* We require some kind of external transceiver, hooked
302 * up through ULPI. TWL4030-family PMICs include one,
303 * which needs a driver, drivers aren't always needed.
304 */
305 musb->xceiv = otg_get_transceiver();
306 if (!musb->xceiv) {
307 pr_err("HS USB OTG: no transceiver configured\n");
308 return -ENODEV;
309 }
310
311 status = pm_runtime_get_sync(dev);
312 if (status < 0) {
313 dev_err(dev, "pm_runtime_get_sync FAILED");
314 goto err1;
315 }
316
317 l = musb_readl(musb->mregs, OTG_INTERFSEL);
318
319 if (data->interface_type == MUSB_INTERFACE_UTMI) {
320 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
321 l &= ~ULPI_12PIN; /* Disable ULPI */
322 l |= UTMI_8BIT; /* Enable UTMI */
323 } else {
324 l |= ULPI_12PIN;
325 }
326
327 musb_writel(musb->mregs, OTG_INTERFSEL, l);
328
329 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
330 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
331 musb_readl(musb->mregs, OTG_REVISION),
332 musb_readl(musb->mregs, OTG_SYSCONFIG),
333 musb_readl(musb->mregs, OTG_SYSSTATUS),
334 musb_readl(musb->mregs, OTG_INTERFSEL),
335 musb_readl(musb->mregs, OTG_SIMENABLE));
336
337 musb->nb.notifier_call = musb_otg_notifications;
338 status = otg_register_notifier(musb->xceiv, &musb->nb);
339
340 if (status)
341 DBG(1, "notification register failed\n");
342
343 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
344
345 return 0;
346
347 err1:
348 pm_runtime_disable(dev);
349 return status;
350 }
351
352 static void omap2430_musb_enable(struct musb *musb)
353 {
354 u8 devctl;
355 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
356 struct device *dev = musb->controller;
357 struct musb_hdrc_platform_data *pdata = dev->platform_data;
358 struct omap_musb_board_data *data = pdata->board_data;
359
360 switch (musb->xceiv->last_event) {
361
362 case USB_EVENT_ID:
363 otg_init(musb->xceiv);
364 if (data->interface_type == MUSB_INTERFACE_UTMI) {
365 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
366 /* start the session */
367 devctl |= MUSB_DEVCTL_SESSION;
368 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
369 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
370 MUSB_DEVCTL_BDEVICE) {
371 cpu_relax();
372
373 if (time_after(jiffies, timeout)) {
374 dev_err(musb->controller,
375 "configured as A device timeout");
376 break;
377 }
378 }
379 }
380 break;
381
382 case USB_EVENT_VBUS:
383 otg_init(musb->xceiv);
384 break;
385
386 default:
387 break;
388 }
389 }
390
391 static void omap2430_musb_disable(struct musb *musb)
392 {
393 if (musb->xceiv->last_event)
394 otg_shutdown(musb->xceiv);
395 }
396
397 static int omap2430_musb_exit(struct musb *musb)
398 {
399 del_timer_sync(&musb_idle_timer);
400
401 omap2430_low_level_exit(musb);
402 otg_put_transceiver(musb->xceiv);
403
404 return 0;
405 }
406
407 static const struct musb_platform_ops omap2430_ops = {
408 .init = omap2430_musb_init,
409 .exit = omap2430_musb_exit,
410
411 .set_mode = omap2430_musb_set_mode,
412 .try_idle = omap2430_musb_try_idle,
413
414 .set_vbus = omap2430_musb_set_vbus,
415
416 .enable = omap2430_musb_enable,
417 .disable = omap2430_musb_disable,
418 };
419
420 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
421
422 static int __init omap2430_probe(struct platform_device *pdev)
423 {
424 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
425 struct platform_device *musb;
426 struct omap2430_glue *glue;
427 int ret = -ENOMEM;
428
429 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
430 if (!glue) {
431 dev_err(&pdev->dev, "failed to allocate glue context\n");
432 goto err0;
433 }
434
435 musb = platform_device_alloc("musb-hdrc", -1);
436 if (!musb) {
437 dev_err(&pdev->dev, "failed to allocate musb device\n");
438 goto err1;
439 }
440
441 musb->dev.parent = &pdev->dev;
442 musb->dev.dma_mask = &omap2430_dmamask;
443 musb->dev.coherent_dma_mask = omap2430_dmamask;
444
445 glue->dev = &pdev->dev;
446 glue->musb = musb;
447
448 pdata->platform_ops = &omap2430_ops;
449
450 platform_set_drvdata(pdev, glue);
451
452 ret = platform_device_add_resources(musb, pdev->resource,
453 pdev->num_resources);
454 if (ret) {
455 dev_err(&pdev->dev, "failed to add resources\n");
456 goto err2;
457 }
458
459 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
460 if (ret) {
461 dev_err(&pdev->dev, "failed to add platform_data\n");
462 goto err2;
463 }
464
465 ret = platform_device_add(musb);
466 if (ret) {
467 dev_err(&pdev->dev, "failed to register musb device\n");
468 goto err2;
469 }
470
471 pm_runtime_enable(&pdev->dev);
472
473 return 0;
474
475 err2:
476 platform_device_put(musb);
477
478 err1:
479 kfree(glue);
480
481 err0:
482 return ret;
483 }
484
485 static int __exit omap2430_remove(struct platform_device *pdev)
486 {
487 struct omap2430_glue *glue = platform_get_drvdata(pdev);
488
489 platform_device_del(glue->musb);
490 platform_device_put(glue->musb);
491 pm_runtime_put(&pdev->dev);
492 pm_runtime_disable(&pdev->dev);
493 kfree(glue);
494
495 return 0;
496 }
497
498 #ifdef CONFIG_PM
499
500 static int omap2430_runtime_suspend(struct device *dev)
501 {
502 struct omap2430_glue *glue = dev_get_drvdata(dev);
503 struct musb *musb = glue_to_musb(glue);
504
505 omap2430_low_level_exit(musb);
506 otg_set_suspend(musb->xceiv, 1);
507
508 return 0;
509 }
510
511 static int omap2430_runtime_resume(struct device *dev)
512 {
513 struct omap2430_glue *glue = dev_get_drvdata(dev);
514 struct musb *musb = glue_to_musb(glue);
515
516 omap2430_low_level_init(musb);
517 otg_set_suspend(musb->xceiv, 0);
518
519 return 0;
520 }
521
522 static struct dev_pm_ops omap2430_pm_ops = {
523 .runtime_suspend = omap2430_runtime_suspend,
524 .runtime_resume = omap2430_runtime_resume,
525 };
526
527 #define DEV_PM_OPS (&omap2430_pm_ops)
528 #else
529 #define DEV_PM_OPS NULL
530 #endif
531
532 static struct platform_driver omap2430_driver = {
533 .remove = __exit_p(omap2430_remove),
534 .driver = {
535 .name = "musb-omap2430",
536 .pm = DEV_PM_OPS,
537 },
538 };
539
540 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
541 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
542 MODULE_LICENSE("GPL v2");
543
544 static int __init omap2430_init(void)
545 {
546 return platform_driver_probe(&omap2430_driver, omap2430_probe);
547 }
548 subsys_initcall(omap2430_init);
549
550 static void __exit omap2430_exit(void)
551 {
552 platform_driver_unregister(&omap2430_driver);
553 }
554 module_exit(omap2430_exit);