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hwmon: (pmbus) Auto-detect temp2 and temp3 registers/attributes
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / musb / omap2430.c
blobc5d4c44d0ffa334246e801c131862bf318ba29cc
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 dev_dbg(musb->controller, "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 dev_dbg(musb->controller, "%s active, deleting timer\n",
118 otg_state_string(musb->xceiv->state));
119 del_timer(&musb_idle_timer);
120 last_timer = jiffies;
121 return;
122 }
123
124 if (time_after(last_timer, timeout)) {
125 if (!timer_pending(&musb_idle_timer))
126 last_timer = timeout;
127 else {
128 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
129 return;
130 }
131 }
132 last_timer = timeout;
133
134 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
135 otg_state_string(musb->xceiv->state),
136 (unsigned long)jiffies_to_msecs(timeout - jiffies));
137 mod_timer(&musb_idle_timer, timeout);
138 }
139
140 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
141 {
142 u8 devctl;
143 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
144 int ret = 1;
145 /* HDRC controls CPEN, but beware current surges during device
146 * connect. They can trigger transient overcurrent conditions
147 * that must be ignored.
148 */
149
150 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
151
152 if (is_on) {
153 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
154 /* start the session */
155 devctl |= MUSB_DEVCTL_SESSION;
156 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
157 /*
158 * Wait for the musb to set as A device to enable the
159 * VBUS
160 */
161 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
162
163 cpu_relax();
164
165 if (time_after(jiffies, timeout)) {
166 dev_err(musb->controller,
167 "configured as A device timeout");
168 ret = -EINVAL;
169 break;
170 }
171 }
172
173 if (ret && musb->xceiv->set_vbus)
174 otg_set_vbus(musb->xceiv, 1);
175 } else {
176 musb->is_active = 1;
177 musb->xceiv->default_a = 1;
178 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
179 devctl |= MUSB_DEVCTL_SESSION;
180 MUSB_HST_MODE(musb);
181 }
182 } else {
183 musb->is_active = 0;
184
185 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
186 * jumping right to B_IDLE...
187 */
188
189 musb->xceiv->default_a = 0;
190 musb->xceiv->state = OTG_STATE_B_IDLE;
191 devctl &= ~MUSB_DEVCTL_SESSION;
192
193 MUSB_DEV_MODE(musb);
194 }
195 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
196
197 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
198 /* otg %3x conf %08x prcm %08x */ "\n",
199 otg_state_string(musb->xceiv->state),
200 musb_readb(musb->mregs, MUSB_DEVCTL));
201 }
202
203 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
204 {
205 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
206
207 devctl |= MUSB_DEVCTL_SESSION;
208 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
209
210 return 0;
211 }
212
213 static inline void omap2430_low_level_exit(struct musb *musb)
214 {
215 u32 l;
216
217 /* in any role */
218 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
219 l |= ENABLEFORCE; /* enable MSTANDBY */
220 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
221 }
222
223 static inline void omap2430_low_level_init(struct musb *musb)
224 {
225 u32 l;
226
227 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
228 l &= ~ENABLEFORCE; /* disable MSTANDBY */
229 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
230 }
231
232 /* blocking notifier support */
233 static int musb_otg_notifications(struct notifier_block *nb,
234 unsigned long event, void *unused)
235 {
236 struct musb *musb = container_of(nb, struct musb, nb);
237 struct device *dev = musb->controller;
238 struct musb_hdrc_platform_data *pdata = dev->platform_data;
239 struct omap_musb_board_data *data = pdata->board_data;
240
241 switch (event) {
242 case USB_EVENT_ID:
243 dev_dbg(musb->controller, "ID GND\n");
244
245 if (is_otg_enabled(musb)) {
246 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
247 if (musb->gadget_driver) {
248 pm_runtime_get_sync(musb->controller);
249 otg_init(musb->xceiv);
250 omap2430_musb_set_vbus(musb, 1);
251 }
252 #endif
253 } else {
254 pm_runtime_get_sync(musb->controller);
255 otg_init(musb->xceiv);
256 omap2430_musb_set_vbus(musb, 1);
257 }
258 break;
259
260 case USB_EVENT_VBUS:
261 dev_dbg(musb->controller, "VBUS Connect\n");
262
263 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
264 if (musb->gadget_driver)
265 pm_runtime_get_sync(musb->controller);
266 #endif
267 otg_init(musb->xceiv);
268 break;
269
270 case USB_EVENT_NONE:
271 dev_dbg(musb->controller, "VBUS Disconnect\n");
272
273 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
274 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
275 if (musb->gadget_driver)
276 #endif
277 {
278 pm_runtime_mark_last_busy(musb->controller);
279 pm_runtime_put_autosuspend(musb->controller);
280 }
281
282 if (data->interface_type == MUSB_INTERFACE_UTMI) {
283 if (musb->xceiv->set_vbus)
284 otg_set_vbus(musb->xceiv, 0);
285 }
286 otg_shutdown(musb->xceiv);
287 break;
288 default:
289 dev_dbg(musb->controller, "ID float\n");
290 return NOTIFY_DONE;
291 }
292
293 return NOTIFY_OK;
294 }
295
296 static int omap2430_musb_init(struct musb *musb)
297 {
298 u32 l, status = 0;
299 struct device *dev = musb->controller;
300 struct musb_hdrc_platform_data *plat = dev->platform_data;
301 struct omap_musb_board_data *data = plat->board_data;
302
303 /* We require some kind of external transceiver, hooked
304 * up through ULPI. TWL4030-family PMICs include one,
305 * which needs a driver, drivers aren't always needed.
306 */
307 musb->xceiv = otg_get_transceiver();
308 if (!musb->xceiv) {
309 pr_err("HS USB OTG: no transceiver configured\n");
310 return -ENODEV;
311 }
312
313 status = pm_runtime_get_sync(dev);
314 if (status < 0) {
315 dev_err(dev, "pm_runtime_get_sync FAILED");
316 goto err1;
317 }
318
319 l = musb_readl(musb->mregs, OTG_INTERFSEL);
320
321 if (data->interface_type == MUSB_INTERFACE_UTMI) {
322 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
323 l &= ~ULPI_12PIN; /* Disable ULPI */
324 l |= UTMI_8BIT; /* Enable UTMI */
325 } else {
326 l |= ULPI_12PIN;
327 }
328
329 musb_writel(musb->mregs, OTG_INTERFSEL, l);
330
331 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
332 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
333 musb_readl(musb->mregs, OTG_REVISION),
334 musb_readl(musb->mregs, OTG_SYSCONFIG),
335 musb_readl(musb->mregs, OTG_SYSSTATUS),
336 musb_readl(musb->mregs, OTG_INTERFSEL),
337 musb_readl(musb->mregs, OTG_SIMENABLE));
338
339 musb->nb.notifier_call = musb_otg_notifications;
340 status = otg_register_notifier(musb->xceiv, &musb->nb);
341
342 if (status)
343 dev_dbg(musb->controller, "notification register failed\n");
344
345 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
346
347 return 0;
348
349 err1:
350 pm_runtime_disable(dev);
351 return status;
352 }
353
354 static void omap2430_musb_enable(struct musb *musb)
355 {
356 u8 devctl;
357 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
358 struct device *dev = musb->controller;
359 struct musb_hdrc_platform_data *pdata = dev->platform_data;
360 struct omap_musb_board_data *data = pdata->board_data;
361
362 switch (musb->xceiv->last_event) {
363
364 case USB_EVENT_ID:
365 otg_init(musb->xceiv);
366 if (data->interface_type == MUSB_INTERFACE_UTMI) {
367 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
368 /* start the session */
369 devctl |= MUSB_DEVCTL_SESSION;
370 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
371 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
372 MUSB_DEVCTL_BDEVICE) {
373 cpu_relax();
374
375 if (time_after(jiffies, timeout)) {
376 dev_err(musb->controller,
377 "configured as A device timeout");
378 break;
379 }
380 }
381 }
382 break;
383
384 case USB_EVENT_VBUS:
385 otg_init(musb->xceiv);
386 break;
387
388 default:
389 break;
390 }
391 }
392
393 static void omap2430_musb_disable(struct musb *musb)
394 {
395 if (musb->xceiv->last_event)
396 otg_shutdown(musb->xceiv);
397 }
398
399 static int omap2430_musb_exit(struct musb *musb)
400 {
401 del_timer_sync(&musb_idle_timer);
402
403 omap2430_low_level_exit(musb);
404 otg_put_transceiver(musb->xceiv);
405
406 return 0;
407 }
408
409 static const struct musb_platform_ops omap2430_ops = {
410 .init = omap2430_musb_init,
411 .exit = omap2430_musb_exit,
412
413 .set_mode = omap2430_musb_set_mode,
414 .try_idle = omap2430_musb_try_idle,
415
416 .set_vbus = omap2430_musb_set_vbus,
417
418 .enable = omap2430_musb_enable,
419 .disable = omap2430_musb_disable,
420 };
421
422 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
423
424 static int __init omap2430_probe(struct platform_device *pdev)
425 {
426 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
427 struct platform_device *musb;
428 struct omap2430_glue *glue;
429 int ret = -ENOMEM;
430
431 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
432 if (!glue) {
433 dev_err(&pdev->dev, "failed to allocate glue context\n");
434 goto err0;
435 }
436
437 musb = platform_device_alloc("musb-hdrc", -1);
438 if (!musb) {
439 dev_err(&pdev->dev, "failed to allocate musb device\n");
440 goto err1;
441 }
442
443 musb->dev.parent = &pdev->dev;
444 musb->dev.dma_mask = &omap2430_dmamask;
445 musb->dev.coherent_dma_mask = omap2430_dmamask;
446
447 glue->dev = &pdev->dev;
448 glue->musb = musb;
449
450 pdata->platform_ops = &omap2430_ops;
451
452 platform_set_drvdata(pdev, glue);
453
454 ret = platform_device_add_resources(musb, pdev->resource,
455 pdev->num_resources);
456 if (ret) {
457 dev_err(&pdev->dev, "failed to add resources\n");
458 goto err2;
459 }
460
461 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
462 if (ret) {
463 dev_err(&pdev->dev, "failed to add platform_data\n");
464 goto err2;
465 }
466
467 ret = platform_device_add(musb);
468 if (ret) {
469 dev_err(&pdev->dev, "failed to register musb device\n");
470 goto err2;
471 }
472
473 pm_runtime_enable(&pdev->dev);
474
475 return 0;
476
477 err2:
478 platform_device_put(musb);
479
480 err1:
481 kfree(glue);
482
483 err0:
484 return ret;
485 }
486
487 static int __exit omap2430_remove(struct platform_device *pdev)
488 {
489 struct omap2430_glue *glue = platform_get_drvdata(pdev);
490
491 platform_device_del(glue->musb);
492 platform_device_put(glue->musb);
493 pm_runtime_put(&pdev->dev);
494 pm_runtime_disable(&pdev->dev);
495 kfree(glue);
496
497 return 0;
498 }
499
500 #ifdef CONFIG_PM
501
502 static int omap2430_runtime_suspend(struct device *dev)
503 {
504 struct omap2430_glue *glue = dev_get_drvdata(dev);
505 struct musb *musb = glue_to_musb(glue);
506
507 omap2430_low_level_exit(musb);
508 otg_set_suspend(musb->xceiv, 1);
509
510 return 0;
511 }
512
513 static int omap2430_runtime_resume(struct device *dev)
514 {
515 struct omap2430_glue *glue = dev_get_drvdata(dev);
516 struct musb *musb = glue_to_musb(glue);
517
518 omap2430_low_level_init(musb);
519 otg_set_suspend(musb->xceiv, 0);
520
521 return 0;
522 }
523
524 static struct dev_pm_ops omap2430_pm_ops = {
525 .runtime_suspend = omap2430_runtime_suspend,
526 .runtime_resume = omap2430_runtime_resume,
527 };
528
529 #define DEV_PM_OPS (&omap2430_pm_ops)
530 #else
531 #define DEV_PM_OPS NULL
532 #endif
533
534 static struct platform_driver omap2430_driver = {
535 .remove = __exit_p(omap2430_remove),
536 .driver = {
537 .name = "musb-omap2430",
538 .pm = DEV_PM_OPS,
539 },
540 };
541
542 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
543 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
544 MODULE_LICENSE("GPL v2");
545
546 static int __init omap2430_init(void)
547 {
548 return platform_driver_probe(&omap2430_driver, omap2430_probe);
549 }
550 subsys_initcall(omap2430_init);
551
552 static void __exit omap2430_exit(void)
553 {
554 platform_driver_unregister(&omap2430_driver);
555 }
556 module_exit(omap2430_exit);
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