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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
42struct omap2430_glue {
43 struct device *dev;
44 struct platform_device *musb;
45};
46#define glue_to_musb(g) platform_get_drvdata(g->musb)
47
48static struct timer_list musb_idle_timer;
49
50static void musb_do_idle(unsigned long _musb)
51{
52 struct musb *musb = (void *)_musb;
53 unsigned long flags;
54 u8 power;
55 u8 devctl;
56
57 spin_lock_irqsave(&musb->lock, flags);
58
59 switch (musb->xceiv->state) {
60 case OTG_STATE_A_WAIT_BCON:
61
62 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
63 if (devctl & MUSB_DEVCTL_BDEVICE) {
64 musb->xceiv->state = OTG_STATE_B_IDLE;
65 MUSB_DEV_MODE(musb);
66 } else {
67 musb->xceiv->state = OTG_STATE_A_IDLE;
68 MUSB_HST_MODE(musb);
69 }
70 break;
71 case OTG_STATE_A_SUSPEND:
72 /* finish RESUME signaling? */
73 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
74 power = musb_readb(musb->mregs, MUSB_POWER);
75 power &= ~MUSB_POWER_RESUME;
76 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
77 musb_writeb(musb->mregs, MUSB_POWER, power);
78 musb->is_active = 1;
79 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
80 | MUSB_PORT_STAT_RESUME);
81 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
82 usb_hcd_poll_rh_status(musb_to_hcd(musb));
83 /* NOTE: it might really be A_WAIT_BCON ... */
84 musb->xceiv->state = OTG_STATE_A_HOST;
85 }
86 break;
87 case OTG_STATE_A_HOST:
88 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
89 if (devctl & MUSB_DEVCTL_BDEVICE)
90 musb->xceiv->state = OTG_STATE_B_IDLE;
91 else
92 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
93 default:
94 break;
95 }
96 spin_unlock_irqrestore(&musb->lock, flags);
97}
98
99
100static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
101{
102 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
103 static unsigned long last_timer;
104
105 if (timeout == 0)
106 timeout = default_timeout;
107
108 /* Never idle if active, or when VBUS timeout is not set as host */
109 if (musb->is_active || ((musb->a_wait_bcon == 0)
110 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
111 dev_dbg(musb->controller, "%s active, deleting timer\n",
112 otg_state_string(musb->xceiv->state));
113 del_timer(&musb_idle_timer);
114 last_timer = jiffies;
115 return;
116 }
117
118 if (time_after(last_timer, timeout)) {
119 if (!timer_pending(&musb_idle_timer))
120 last_timer = timeout;
121 else {
122 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
123 return;
124 }
125 }
126 last_timer = timeout;
127
128 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
129 otg_state_string(musb->xceiv->state),
130 (unsigned long)jiffies_to_msecs(timeout - jiffies));
131 mod_timer(&musb_idle_timer, timeout);
132}
133
134static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
135{
136 u8 devctl;
137 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
138 int ret = 1;
139 /* HDRC controls CPEN, but beware current surges during device
140 * connect. They can trigger transient overcurrent conditions
141 * that must be ignored.
142 */
143
144 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
145
146 if (is_on) {
147 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
148 /* start the session */
149 devctl |= MUSB_DEVCTL_SESSION;
150 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
151 /*
152 * Wait for the musb to set as A device to enable the
153 * VBUS
154 */
155 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
156
157 cpu_relax();
158
159 if (time_after(jiffies, timeout)) {
160 dev_err(musb->controller,
161 "configured as A device timeout");
162 ret = -EINVAL;
163 break;
164 }
165 }
166
167 if (ret && musb->xceiv->set_vbus)
168 otg_set_vbus(musb->xceiv, 1);
169 } else {
170 musb->is_active = 1;
171 musb->xceiv->default_a = 1;
172 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
173 devctl |= MUSB_DEVCTL_SESSION;
174 MUSB_HST_MODE(musb);
175 }
176 } else {
177 musb->is_active = 0;
178
179 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
180 * jumping right to B_IDLE...
181 */
182
183 musb->xceiv->default_a = 0;
184 musb->xceiv->state = OTG_STATE_B_IDLE;
185 devctl &= ~MUSB_DEVCTL_SESSION;
186
187 MUSB_DEV_MODE(musb);
188 }
189 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
190
191 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
192 /* otg %3x conf %08x prcm %08x */ "\n",
193 otg_state_string(musb->xceiv->state),
194 musb_readb(musb->mregs, MUSB_DEVCTL));
195}
196
197static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
198{
199 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
200
201 devctl |= MUSB_DEVCTL_SESSION;
202 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
203
204 return 0;
205}
206
207static inline void omap2430_low_level_exit(struct musb *musb)
208{
209 u32 l;
210
211 /* in any role */
212 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
213 l |= ENABLEFORCE; /* enable MSTANDBY */
214 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
215}
216
217static inline void omap2430_low_level_init(struct musb *musb)
218{
219 u32 l;
220
221 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
222 l &= ~ENABLEFORCE; /* disable MSTANDBY */
223 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
224}
225
226/* blocking notifier support */
227static int musb_otg_notifications(struct notifier_block *nb,
228 unsigned long event, void *unused)
229{
230 struct musb *musb = container_of(nb, struct musb, nb);
231 struct device *dev = musb->controller;
232 struct musb_hdrc_platform_data *pdata = dev->platform_data;
233 struct omap_musb_board_data *data = pdata->board_data;
234
235 switch (event) {
236 case USB_EVENT_ID:
237 dev_dbg(musb->controller, "ID GND\n");
238
239 if (is_otg_enabled(musb)) {
240 if (musb->gadget_driver) {
241 pm_runtime_get_sync(musb->controller);
242 otg_init(musb->xceiv);
243 omap2430_musb_set_vbus(musb, 1);
244 }
245 } else {
246 pm_runtime_get_sync(musb->controller);
247 otg_init(musb->xceiv);
248 omap2430_musb_set_vbus(musb, 1);
249 }
250 break;
251
252 case USB_EVENT_VBUS:
253 dev_dbg(musb->controller, "VBUS Connect\n");
254
255 if (musb->gadget_driver)
256 pm_runtime_get_sync(musb->controller);
257 otg_init(musb->xceiv);
258 break;
259
260 case USB_EVENT_NONE:
261 dev_dbg(musb->controller, "VBUS Disconnect\n");
262
263 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
264 if (musb->gadget_driver) {
265 pm_runtime_mark_last_busy(musb->controller);
266 pm_runtime_put_autosuspend(musb->controller);
267 }
268
269 if (data->interface_type == MUSB_INTERFACE_UTMI) {
270 if (musb->xceiv->set_vbus)
271 otg_set_vbus(musb->xceiv, 0);
272 }
273 otg_shutdown(musb->xceiv);
274 break;
275 default:
276 dev_dbg(musb->controller, "ID float\n");
277 return NOTIFY_DONE;
278 }
279
280 return NOTIFY_OK;
281}
282
283static int omap2430_musb_init(struct musb *musb)
284{
285 u32 l, status = 0;
286 struct device *dev = musb->controller;
287 struct musb_hdrc_platform_data *plat = dev->platform_data;
288 struct omap_musb_board_data *data = plat->board_data;
289
290 /* We require some kind of external transceiver, hooked
291 * up through ULPI. TWL4030-family PMICs include one,
292 * which needs a driver, drivers aren't always needed.
293 */
294 musb->xceiv = otg_get_transceiver();
295 if (!musb->xceiv) {
296 pr_err("HS USB OTG: no transceiver configured\n");
297 return -ENODEV;
298 }
299
300 status = pm_runtime_get_sync(dev);
301 if (status < 0) {
302 dev_err(dev, "pm_runtime_get_sync FAILED");
303 goto err1;
304 }
305
306 l = musb_readl(musb->mregs, OTG_INTERFSEL);
307
308 if (data->interface_type == MUSB_INTERFACE_UTMI) {
309 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
310 l &= ~ULPI_12PIN; /* Disable ULPI */
311 l |= UTMI_8BIT; /* Enable UTMI */
312 } else {
313 l |= ULPI_12PIN;
314 }
315
316 musb_writel(musb->mregs, OTG_INTERFSEL, l);
317
318 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
319 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
320 musb_readl(musb->mregs, OTG_REVISION),
321 musb_readl(musb->mregs, OTG_SYSCONFIG),
322 musb_readl(musb->mregs, OTG_SYSSTATUS),
323 musb_readl(musb->mregs, OTG_INTERFSEL),
324 musb_readl(musb->mregs, OTG_SIMENABLE));
325
326 musb->nb.notifier_call = musb_otg_notifications;
327 status = otg_register_notifier(musb->xceiv, &musb->nb);
328
329 if (status)
330 dev_dbg(musb->controller, "notification register failed\n");
331
332 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
333
334 return 0;
335
336err1:
337 pm_runtime_disable(dev);
338 return status;
339}
340
341static void omap2430_musb_enable(struct musb *musb)
342{
343 u8 devctl;
344 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
345 struct device *dev = musb->controller;
346 struct musb_hdrc_platform_data *pdata = dev->platform_data;
347 struct omap_musb_board_data *data = pdata->board_data;
348
349 switch (musb->xceiv->last_event) {
350
351 case USB_EVENT_ID:
352 otg_init(musb->xceiv);
353 if (data->interface_type == MUSB_INTERFACE_UTMI) {
354 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
355 /* start the session */
356 devctl |= MUSB_DEVCTL_SESSION;
357 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
358 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
359 MUSB_DEVCTL_BDEVICE) {
360 cpu_relax();
361
362 if (time_after(jiffies, timeout)) {
363 dev_err(musb->controller,
364 "configured as A device timeout");
365 break;
366 }
367 }
368 }
369 break;
370
371 case USB_EVENT_VBUS:
372 otg_init(musb->xceiv);
373 break;
374
375 default:
376 break;
377 }
378}
379
380static void omap2430_musb_disable(struct musb *musb)
381{
382 if (musb->xceiv->last_event)
383 otg_shutdown(musb->xceiv);
384}
385
386static int omap2430_musb_exit(struct musb *musb)
387{
388 del_timer_sync(&musb_idle_timer);
389
390 omap2430_low_level_exit(musb);
391 otg_put_transceiver(musb->xceiv);
392
393 return 0;
394}
395
396static const struct musb_platform_ops omap2430_ops = {
397 .init = omap2430_musb_init,
398 .exit = omap2430_musb_exit,
399
400 .set_mode = omap2430_musb_set_mode,
401 .try_idle = omap2430_musb_try_idle,
402
403 .set_vbus = omap2430_musb_set_vbus,
404
405 .enable = omap2430_musb_enable,
406 .disable = omap2430_musb_disable,
407};
408
409static u64 omap2430_dmamask = DMA_BIT_MASK(32);
410
411static int __init omap2430_probe(struct platform_device *pdev)
412{
413 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
414 struct platform_device *musb;
415 struct omap2430_glue *glue;
416 int ret = -ENOMEM;
417
418 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
419 if (!glue) {
420 dev_err(&pdev->dev, "failed to allocate glue context\n");
421 goto err0;
422 }
423
424 musb = platform_device_alloc("musb-hdrc", -1);
425 if (!musb) {
426 dev_err(&pdev->dev, "failed to allocate musb device\n");
427 goto err1;
428 }
429
430 musb->dev.parent = &pdev->dev;
431 musb->dev.dma_mask = &omap2430_dmamask;
432 musb->dev.coherent_dma_mask = omap2430_dmamask;
433
434 glue->dev = &pdev->dev;
435 glue->musb = musb;
436
437 pdata->platform_ops = &omap2430_ops;
438
439 platform_set_drvdata(pdev, glue);
440
441 ret = platform_device_add_resources(musb, pdev->resource,
442 pdev->num_resources);
443 if (ret) {
444 dev_err(&pdev->dev, "failed to add resources\n");
445 goto err2;
446 }
447
448 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
449 if (ret) {
450 dev_err(&pdev->dev, "failed to add platform_data\n");
451 goto err2;
452 }
453
454 ret = platform_device_add(musb);
455 if (ret) {
456 dev_err(&pdev->dev, "failed to register musb device\n");
457 goto err2;
458 }
459
460 pm_runtime_enable(&pdev->dev);
461
462 return 0;
463
464err2:
465 platform_device_put(musb);
466
467err1:
468 kfree(glue);
469
470err0:
471 return ret;
472}
473
474static int __exit omap2430_remove(struct platform_device *pdev)
475{
476 struct omap2430_glue *glue = platform_get_drvdata(pdev);
477
478 platform_device_del(glue->musb);
479 platform_device_put(glue->musb);
480 pm_runtime_put(&pdev->dev);
481 pm_runtime_disable(&pdev->dev);
482 kfree(glue);
483
484 return 0;
485}
486
487#ifdef CONFIG_PM
488
489static int omap2430_runtime_suspend(struct device *dev)
490{
491 struct omap2430_glue *glue = dev_get_drvdata(dev);
492 struct musb *musb = glue_to_musb(glue);
493
494 omap2430_low_level_exit(musb);
495 otg_set_suspend(musb->xceiv, 1);
496
497 return 0;
498}
499
500static int omap2430_runtime_resume(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_init(musb);
506 otg_set_suspend(musb->xceiv, 0);
507
508 return 0;
509}
510
511static struct dev_pm_ops omap2430_pm_ops = {
512 .runtime_suspend = omap2430_runtime_suspend,
513 .runtime_resume = omap2430_runtime_resume,
514};
515
516#define DEV_PM_OPS (&omap2430_pm_ops)
517#else
518#define DEV_PM_OPS NULL
519#endif
520
521static struct platform_driver omap2430_driver = {
522 .remove = __exit_p(omap2430_remove),
523 .driver = {
524 .name = "musb-omap2430",
525 .pm = DEV_PM_OPS,
526 },
527};
528
529MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
530MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
531MODULE_LICENSE("GPL v2");
532
533static int __init omap2430_init(void)
534{
535 return platform_driver_probe(&omap2430_driver, omap2430_probe);
536}
537subsys_initcall(omap2430_init);
538
539static void __exit omap2430_exit(void)
540{
541 platform_driver_unregister(&omap2430_driver);
542}
543module_exit(omap2430_exit);
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/io.h>
33#include <linux/platform_device.h>
34#include <linux/dma-mapping.h>
35#include <linux/pm_runtime.h>
36#include <linux/err.h>
37
38#include "musb_core.h"
39#include "omap2430.h"
40
41struct omap2430_glue {
42 struct device *dev;
43 struct platform_device *musb;
44};
45#define glue_to_musb(g) platform_get_drvdata(g->musb)
46
47static struct timer_list musb_idle_timer;
48
49static void musb_do_idle(unsigned long _musb)
50{
51 struct musb *musb = (void *)_musb;
52 unsigned long flags;
53 u8 power;
54 u8 devctl;
55
56 spin_lock_irqsave(&musb->lock, flags);
57
58 switch (musb->xceiv->state) {
59 case OTG_STATE_A_WAIT_BCON:
60
61 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
62 if (devctl & MUSB_DEVCTL_BDEVICE) {
63 musb->xceiv->state = OTG_STATE_B_IDLE;
64 MUSB_DEV_MODE(musb);
65 } else {
66 musb->xceiv->state = OTG_STATE_A_IDLE;
67 MUSB_HST_MODE(musb);
68 }
69 break;
70 case OTG_STATE_A_SUSPEND:
71 /* finish RESUME signaling? */
72 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
73 power = musb_readb(musb->mregs, MUSB_POWER);
74 power &= ~MUSB_POWER_RESUME;
75 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
76 musb_writeb(musb->mregs, MUSB_POWER, power);
77 musb->is_active = 1;
78 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
79 | MUSB_PORT_STAT_RESUME);
80 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
81 usb_hcd_poll_rh_status(musb_to_hcd(musb));
82 /* NOTE: it might really be A_WAIT_BCON ... */
83 musb->xceiv->state = OTG_STATE_A_HOST;
84 }
85 break;
86 case OTG_STATE_A_HOST:
87 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
88 if (devctl & MUSB_DEVCTL_BDEVICE)
89 musb->xceiv->state = OTG_STATE_B_IDLE;
90 else
91 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
92 default:
93 break;
94 }
95 spin_unlock_irqrestore(&musb->lock, flags);
96}
97
98
99static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
100{
101 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
102 static unsigned long last_timer;
103
104 if (timeout == 0)
105 timeout = default_timeout;
106
107 /* Never idle if active, or when VBUS timeout is not set as host */
108 if (musb->is_active || ((musb->a_wait_bcon == 0)
109 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
110 dev_dbg(musb->controller, "%s active, deleting timer\n",
111 otg_state_string(musb->xceiv->state));
112 del_timer(&musb_idle_timer);
113 last_timer = jiffies;
114 return;
115 }
116
117 if (time_after(last_timer, timeout)) {
118 if (!timer_pending(&musb_idle_timer))
119 last_timer = timeout;
120 else {
121 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
122 return;
123 }
124 }
125 last_timer = timeout;
126
127 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
128 otg_state_string(musb->xceiv->state),
129 (unsigned long)jiffies_to_msecs(timeout - jiffies));
130 mod_timer(&musb_idle_timer, timeout);
131}
132
133static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
134{
135 struct usb_otg *otg = musb->xceiv->otg;
136 u8 devctl;
137 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
138 int ret = 1;
139 /* HDRC controls CPEN, but beware current surges during device
140 * connect. They can trigger transient overcurrent conditions
141 * that must be ignored.
142 */
143
144 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
145
146 if (is_on) {
147 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
148 /* start the session */
149 devctl |= MUSB_DEVCTL_SESSION;
150 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
151 /*
152 * Wait for the musb to set as A device to enable the
153 * VBUS
154 */
155 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
156
157 cpu_relax();
158
159 if (time_after(jiffies, timeout)) {
160 dev_err(musb->controller,
161 "configured as A device timeout");
162 ret = -EINVAL;
163 break;
164 }
165 }
166
167 if (ret && otg->set_vbus)
168 otg_set_vbus(otg, 1);
169 } else {
170 musb->is_active = 1;
171 otg->default_a = 1;
172 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
173 devctl |= MUSB_DEVCTL_SESSION;
174 MUSB_HST_MODE(musb);
175 }
176 } else {
177 musb->is_active = 0;
178
179 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
180 * jumping right to B_IDLE...
181 */
182
183 otg->default_a = 0;
184 musb->xceiv->state = OTG_STATE_B_IDLE;
185 devctl &= ~MUSB_DEVCTL_SESSION;
186
187 MUSB_DEV_MODE(musb);
188 }
189 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
190
191 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
192 /* otg %3x conf %08x prcm %08x */ "\n",
193 otg_state_string(musb->xceiv->state),
194 musb_readb(musb->mregs, MUSB_DEVCTL));
195}
196
197static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
198{
199 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
200
201 devctl |= MUSB_DEVCTL_SESSION;
202 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
203
204 return 0;
205}
206
207static inline void omap2430_low_level_exit(struct musb *musb)
208{
209 u32 l;
210
211 /* in any role */
212 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
213 l |= ENABLEFORCE; /* enable MSTANDBY */
214 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
215}
216
217static inline void omap2430_low_level_init(struct musb *musb)
218{
219 u32 l;
220
221 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
222 l &= ~ENABLEFORCE; /* disable MSTANDBY */
223 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
224}
225
226static int musb_otg_notifications(struct notifier_block *nb,
227 unsigned long event, void *unused)
228{
229 struct musb *musb = container_of(nb, struct musb, nb);
230
231 musb->xceiv_event = event;
232 schedule_work(&musb->otg_notifier_work);
233
234 return NOTIFY_OK;
235}
236
237static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
238{
239 struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
240 struct device *dev = musb->controller;
241 struct musb_hdrc_platform_data *pdata = dev->platform_data;
242 struct omap_musb_board_data *data = pdata->board_data;
243
244 switch (musb->xceiv_event) {
245 case USB_EVENT_ID:
246 dev_dbg(musb->controller, "ID GND\n");
247
248 if (!is_otg_enabled(musb) || musb->gadget_driver) {
249 pm_runtime_get_sync(musb->controller);
250 usb_phy_init(musb->xceiv);
251 omap2430_musb_set_vbus(musb, 1);
252 }
253 break;
254
255 case USB_EVENT_VBUS:
256 dev_dbg(musb->controller, "VBUS Connect\n");
257
258 if (musb->gadget_driver)
259 pm_runtime_get_sync(musb->controller);
260 usb_phy_init(musb->xceiv);
261 break;
262
263 case USB_EVENT_NONE:
264 dev_dbg(musb->controller, "VBUS Disconnect\n");
265
266 if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
267 if (musb->gadget_driver) {
268 pm_runtime_mark_last_busy(musb->controller);
269 pm_runtime_put_autosuspend(musb->controller);
270 }
271
272 if (data->interface_type == MUSB_INTERFACE_UTMI) {
273 if (musb->xceiv->otg->set_vbus)
274 otg_set_vbus(musb->xceiv->otg, 0);
275 }
276 usb_phy_shutdown(musb->xceiv);
277 break;
278 default:
279 dev_dbg(musb->controller, "ID float\n");
280 }
281}
282
283static int omap2430_musb_init(struct musb *musb)
284{
285 u32 l;
286 int status = 0;
287 struct device *dev = musb->controller;
288 struct musb_hdrc_platform_data *plat = dev->platform_data;
289 struct omap_musb_board_data *data = plat->board_data;
290
291 /* We require some kind of external transceiver, hooked
292 * up through ULPI. TWL4030-family PMICs include one,
293 * which needs a driver, drivers aren't always needed.
294 */
295 musb->xceiv = usb_get_transceiver();
296 if (!musb->xceiv) {
297 pr_err("HS USB OTG: no transceiver configured\n");
298 return -ENODEV;
299 }
300
301 INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);
302
303 status = pm_runtime_get_sync(dev);
304 if (status < 0) {
305 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
306 goto err1;
307 }
308
309 l = musb_readl(musb->mregs, OTG_INTERFSEL);
310
311 if (data->interface_type == MUSB_INTERFACE_UTMI) {
312 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
313 l &= ~ULPI_12PIN; /* Disable ULPI */
314 l |= UTMI_8BIT; /* Enable UTMI */
315 } else {
316 l |= ULPI_12PIN;
317 }
318
319 musb_writel(musb->mregs, OTG_INTERFSEL, l);
320
321 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
322 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
323 musb_readl(musb->mregs, OTG_REVISION),
324 musb_readl(musb->mregs, OTG_SYSCONFIG),
325 musb_readl(musb->mregs, OTG_SYSSTATUS),
326 musb_readl(musb->mregs, OTG_INTERFSEL),
327 musb_readl(musb->mregs, OTG_SIMENABLE));
328
329 musb->nb.notifier_call = musb_otg_notifications;
330 status = usb_register_notifier(musb->xceiv, &musb->nb);
331
332 if (status)
333 dev_dbg(musb->controller, "notification register failed\n");
334
335 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
336
337 pm_runtime_put_noidle(musb->controller);
338 return 0;
339
340err1:
341 return status;
342}
343
344static void omap2430_musb_enable(struct musb *musb)
345{
346 u8 devctl;
347 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
348 struct device *dev = musb->controller;
349 struct musb_hdrc_platform_data *pdata = dev->platform_data;
350 struct omap_musb_board_data *data = pdata->board_data;
351
352 switch (musb->xceiv->last_event) {
353
354 case USB_EVENT_ID:
355 usb_phy_init(musb->xceiv);
356 if (data->interface_type != MUSB_INTERFACE_UTMI)
357 break;
358 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
359 /* start the session */
360 devctl |= MUSB_DEVCTL_SESSION;
361 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
362 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
363 MUSB_DEVCTL_BDEVICE) {
364 cpu_relax();
365
366 if (time_after(jiffies, timeout)) {
367 dev_err(dev, "configured as A device timeout");
368 break;
369 }
370 }
371 break;
372
373 case USB_EVENT_VBUS:
374 usb_phy_init(musb->xceiv);
375 break;
376
377 default:
378 break;
379 }
380}
381
382static void omap2430_musb_disable(struct musb *musb)
383{
384 if (musb->xceiv->last_event)
385 usb_phy_shutdown(musb->xceiv);
386}
387
388static int omap2430_musb_exit(struct musb *musb)
389{
390 del_timer_sync(&musb_idle_timer);
391 cancel_work_sync(&musb->otg_notifier_work);
392
393 omap2430_low_level_exit(musb);
394 usb_put_transceiver(musb->xceiv);
395
396 return 0;
397}
398
399static const struct musb_platform_ops omap2430_ops = {
400 .init = omap2430_musb_init,
401 .exit = omap2430_musb_exit,
402
403 .set_mode = omap2430_musb_set_mode,
404 .try_idle = omap2430_musb_try_idle,
405
406 .set_vbus = omap2430_musb_set_vbus,
407
408 .enable = omap2430_musb_enable,
409 .disable = omap2430_musb_disable,
410};
411
412static u64 omap2430_dmamask = DMA_BIT_MASK(32);
413
414static int __devinit omap2430_probe(struct platform_device *pdev)
415{
416 struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
417 struct platform_device *musb;
418 struct omap2430_glue *glue;
419 int ret = -ENOMEM;
420
421 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
422 if (!glue) {
423 dev_err(&pdev->dev, "failed to allocate glue context\n");
424 goto err0;
425 }
426
427 musb = platform_device_alloc("musb-hdrc", -1);
428 if (!musb) {
429 dev_err(&pdev->dev, "failed to allocate musb device\n");
430 goto err1;
431 }
432
433 musb->dev.parent = &pdev->dev;
434 musb->dev.dma_mask = &omap2430_dmamask;
435 musb->dev.coherent_dma_mask = omap2430_dmamask;
436
437 glue->dev = &pdev->dev;
438 glue->musb = musb;
439
440 pdata->platform_ops = &omap2430_ops;
441
442 platform_set_drvdata(pdev, glue);
443
444 ret = platform_device_add_resources(musb, pdev->resource,
445 pdev->num_resources);
446 if (ret) {
447 dev_err(&pdev->dev, "failed to add resources\n");
448 goto err2;
449 }
450
451 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
452 if (ret) {
453 dev_err(&pdev->dev, "failed to add platform_data\n");
454 goto err2;
455 }
456
457 pm_runtime_enable(&pdev->dev);
458
459 ret = platform_device_add(musb);
460 if (ret) {
461 dev_err(&pdev->dev, "failed to register musb device\n");
462 goto err2;
463 }
464
465 return 0;
466
467err2:
468 platform_device_put(musb);
469
470err1:
471 kfree(glue);
472
473err0:
474 return ret;
475}
476
477static int __devexit omap2430_remove(struct platform_device *pdev)
478{
479 struct omap2430_glue *glue = platform_get_drvdata(pdev);
480
481 platform_device_del(glue->musb);
482 platform_device_put(glue->musb);
483 kfree(glue);
484
485 return 0;
486}
487
488#ifdef CONFIG_PM
489
490static int omap2430_runtime_suspend(struct device *dev)
491{
492 struct omap2430_glue *glue = dev_get_drvdata(dev);
493 struct musb *musb = glue_to_musb(glue);
494
495 if (musb) {
496 musb->context.otg_interfsel = musb_readl(musb->mregs,
497 OTG_INTERFSEL);
498
499 omap2430_low_level_exit(musb);
500 usb_phy_set_suspend(musb->xceiv, 1);
501 }
502
503 return 0;
504}
505
506static int omap2430_runtime_resume(struct device *dev)
507{
508 struct omap2430_glue *glue = dev_get_drvdata(dev);
509 struct musb *musb = glue_to_musb(glue);
510
511 if (musb) {
512 omap2430_low_level_init(musb);
513 musb_writel(musb->mregs, OTG_INTERFSEL,
514 musb->context.otg_interfsel);
515
516 usb_phy_set_suspend(musb->xceiv, 0);
517 }
518
519 return 0;
520}
521
522static 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
532static struct platform_driver omap2430_driver = {
533 .probe = omap2430_probe,
534 .remove = __devexit_p(omap2430_remove),
535 .driver = {
536 .name = "musb-omap2430",
537 .pm = DEV_PM_OPS,
538 },
539};
540
541MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
542MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
543MODULE_LICENSE("GPL v2");
544
545static int __init omap2430_init(void)
546{
547 return platform_driver_register(&omap2430_driver);
548}
549module_init(omap2430_init);
550
551static void __exit omap2430_exit(void)
552{
553 platform_driver_unregister(&omap2430_driver);
554}
555module_exit(omap2430_exit);