1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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/of.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#include <linux/delay.h>
39#include <linux/usb/musb-omap.h>
40#include <linux/usb/omap_control_usb.h>
41
42#include "musb_core.h"
43#include "omap2430.h"
44
45struct omap2430_glue {
46 struct device *dev;
47 struct platform_device *musb;
48 enum omap_musb_vbus_id_status status;
49 struct work_struct omap_musb_mailbox_work;
50 struct device *control_otghs;
51};
52#define glue_to_musb(g) platform_get_drvdata(g->musb)
53
54static struct omap2430_glue *_glue;
55
56static struct timer_list musb_idle_timer;
57
58static void musb_do_idle(unsigned long _musb)
59{
60 struct musb *musb = (void *)_musb;
61 unsigned long flags;
62 u8 power;
63 u8 devctl;
64
65 spin_lock_irqsave(&musb->lock, flags);
66
67 switch (musb->xceiv->state) {
68 case OTG_STATE_A_WAIT_BCON:
69
70 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
71 if (devctl & MUSB_DEVCTL_BDEVICE) {
72 musb->xceiv->state = OTG_STATE_B_IDLE;
73 MUSB_DEV_MODE(musb);
74 } else {
75 musb->xceiv->state = OTG_STATE_A_IDLE;
76 MUSB_HST_MODE(musb);
77 }
78 break;
79 case OTG_STATE_A_SUSPEND:
80
81 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
82 power = musb_readb(musb->mregs, MUSB_POWER);
83 power &= ~MUSB_POWER_RESUME;
84 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
85 musb_writeb(musb->mregs, MUSB_POWER, power);
86 musb->is_active = 1;
87 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
88 | MUSB_PORT_STAT_RESUME);
89 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
90 usb_hcd_poll_rh_status(musb->hcd);
91
92 musb->xceiv->state = OTG_STATE_A_HOST;
93 }
94 break;
95 case OTG_STATE_A_HOST:
96 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
97 if (devctl & MUSB_DEVCTL_BDEVICE)
98 musb->xceiv->state = OTG_STATE_B_IDLE;
99 else
100 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
101 default:
102 break;
103 }
104 spin_unlock_irqrestore(&musb->lock, flags);
105}
106
107
108static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
109{
110 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
111 static unsigned long last_timer;
112
113 if (timeout == 0)
114 timeout = default_timeout;
115
116
117 if (musb->is_active || ((musb->a_wait_bcon == 0)
118 && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
119 dev_dbg(musb->controller, "%s active, deleting timer\n",
120 usb_otg_state_string(musb->xceiv->state));
121 del_timer(&musb_idle_timer);
122 last_timer = jiffies;
123 return;
124 }
125
126 if (time_after(last_timer, timeout)) {
127 if (!timer_pending(&musb_idle_timer))
128 last_timer = timeout;
129 else {
130 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
131 return;
132 }
133 }
134 last_timer = timeout;
135
136 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
137 usb_otg_state_string(musb->xceiv->state),
138 (unsigned long)jiffies_to_msecs(timeout - jiffies));
139 mod_timer(&musb_idle_timer, timeout);
140}
141
142static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
143{
144 struct usb_otg *otg = musb->xceiv->otg;
145 u8 devctl;
146 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
147
148
149
150
151
152 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
153
154 if (is_on) {
155 if (musb->xceiv->state == OTG_STATE_A_IDLE) {
156 int loops = 100;
157
158 devctl |= MUSB_DEVCTL_SESSION;
159 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
160
161
162
163
164 while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
165
166 mdelay(5);
167 cpu_relax();
168
169 if (time_after(jiffies, timeout)
170 || loops-- <= 0) {
171 dev_err(musb->controller,
172 "configured as A device timeout");
173 break;
174 }
175 }
176
177 otg_set_vbus(otg, 1);
178 } else {
179 musb->is_active = 1;
180 otg->default_a = 1;
181 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
182 devctl |= MUSB_DEVCTL_SESSION;
183 MUSB_HST_MODE(musb);
184 }
185 } else {
186 musb->is_active = 0;
187
188
189
190
191
192 otg->default_a = 0;
193 musb->xceiv->state = OTG_STATE_B_IDLE;
194 devctl &= ~MUSB_DEVCTL_SESSION;
195
196 MUSB_DEV_MODE(musb);
197 }
198 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
199
200 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
201 "\n",
202 usb_otg_state_string(musb->xceiv->state),
203 musb_readb(musb->mregs, MUSB_DEVCTL));
204}
205
206static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
207{
208 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
209
210 devctl |= MUSB_DEVCTL_SESSION;
211 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
212
213 return 0;
214}
215
216static inline void omap2430_low_level_exit(struct musb *musb)
217{
218 u32 l;
219
220
221 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
222 l |= ENABLEFORCE;
223 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
224}
225
226static inline void omap2430_low_level_init(struct musb *musb)
227{
228 u32 l;
229
230 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
231 l &= ~ENABLEFORCE;
232 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
233}
234
235void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
236{
237 struct omap2430_glue *glue = _glue;
238
239 if (!glue) {
240 pr_err("%s: musb core is not yet initialized\n", __func__);
241 return;
242 }
243 glue->status = status;
244
245 if (!glue_to_musb(glue)) {
246 pr_err("%s: musb core is not yet ready\n", __func__);
247 return;
248 }
249
250 schedule_work(&glue->omap_musb_mailbox_work);
251}
252EXPORT_SYMBOL_GPL(omap_musb_mailbox);
253
254static void omap_musb_set_mailbox(struct omap2430_glue *glue)
255{
256 struct musb *musb = glue_to_musb(glue);
257 struct device *dev = musb->controller;
258 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
259 struct omap_musb_board_data *data = pdata->board_data;
260 struct usb_otg *otg = musb->xceiv->otg;
261
262 switch (glue->status) {
263 case OMAP_MUSB_ID_GROUND:
264 dev_dbg(dev, "ID GND\n");
265
266 otg->default_a = true;
267 musb->xceiv->state = OTG_STATE_A_IDLE;
268 musb->xceiv->last_event = USB_EVENT_ID;
269 if (musb->gadget_driver) {
270 pm_runtime_get_sync(dev);
271 omap_control_usb_set_mode(glue->control_otghs,
272 USB_MODE_HOST);
273 omap2430_musb_set_vbus(musb, 1);
274 }
275 break;
276
277 case OMAP_MUSB_VBUS_VALID:
278 dev_dbg(dev, "VBUS Connect\n");
279
280 otg->default_a = false;
281 musb->xceiv->state = OTG_STATE_B_IDLE;
282 musb->xceiv->last_event = USB_EVENT_VBUS;
283 if (musb->gadget_driver)
284 pm_runtime_get_sync(dev);
285 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
286 break;
287
288 case OMAP_MUSB_ID_FLOAT:
289 case OMAP_MUSB_VBUS_OFF:
290 dev_dbg(dev, "VBUS Disconnect\n");
291
292 musb->xceiv->last_event = USB_EVENT_NONE;
293 if (musb->gadget_driver) {
294 omap2430_musb_set_vbus(musb, 0);
295 pm_runtime_mark_last_busy(dev);
296 pm_runtime_put_autosuspend(dev);
297 }
298
299 if (data->interface_type == MUSB_INTERFACE_UTMI)
300 otg_set_vbus(musb->xceiv->otg, 0);
301
302 omap_control_usb_set_mode(glue->control_otghs,
303 USB_MODE_DISCONNECT);
304 break;
305 default:
306 dev_dbg(dev, "ID float\n");
307 }
308}
309
310
311static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
312{
313 struct omap2430_glue *glue = container_of(mailbox_work,
314 struct omap2430_glue, omap_musb_mailbox_work);
315 omap_musb_set_mailbox(glue);
316}
317
318static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
319{
320 unsigned long flags;
321 irqreturn_t retval = IRQ_NONE;
322 struct musb *musb = __hci;
323
324 spin_lock_irqsave(&musb->lock, flags);
325
326 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
327 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
328 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
329
330 if (musb->int_usb || musb->int_tx || musb->int_rx)
331 retval = musb_interrupt(musb);
332
333 spin_unlock_irqrestore(&musb->lock, flags);
334
335 return retval;
336}
337
338static int omap2430_musb_init(struct musb *musb)
339{
340 u32 l;
341 int status = 0;
342 struct device *dev = musb->controller;
343 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
344 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
345 struct omap_musb_board_data *data = plat->board_data;
346
347
348
349
350
351 if (dev->parent->of_node)
352 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
353 "usb-phy", 0);
354 else
355 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
356
357 if (IS_ERR(musb->xceiv)) {
358 status = PTR_ERR(musb->xceiv);
359
360 if (status == -ENXIO)
361 return status;
362
363 pr_err("HS USB OTG: no transceiver configured\n");
364 return -EPROBE_DEFER;
365 }
366
367 musb->isr = omap2430_musb_interrupt;
368
369 status = pm_runtime_get_sync(dev);
370 if (status < 0) {
371 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
372 goto err1;
373 }
374
375 l = musb_readl(musb->mregs, OTG_INTERFSEL);
376
377 if (data->interface_type == MUSB_INTERFACE_UTMI) {
378
379 l &= ~ULPI_12PIN;
380 l |= UTMI_8BIT;
381 } else {
382 l |= ULPI_12PIN;
383 }
384
385 musb_writel(musb->mregs, OTG_INTERFSEL, l);
386
387 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
388 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
389 musb_readl(musb->mregs, OTG_REVISION),
390 musb_readl(musb->mregs, OTG_SYSCONFIG),
391 musb_readl(musb->mregs, OTG_SYSSTATUS),
392 musb_readl(musb->mregs, OTG_INTERFSEL),
393 musb_readl(musb->mregs, OTG_SIMENABLE));
394
395 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
396
397 if (glue->status != OMAP_MUSB_UNKNOWN)
398 omap_musb_set_mailbox(glue);
399
400 usb_phy_init(musb->xceiv);
401
402 pm_runtime_put_noidle(musb->controller);
403 return 0;
404
405err1:
406 return status;
407}
408
409static void omap2430_musb_enable(struct musb *musb)
410{
411 u8 devctl;
412 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
413 struct device *dev = musb->controller;
414 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
415 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
416 struct omap_musb_board_data *data = pdata->board_data;
417
418 switch (glue->status) {
419
420 case OMAP_MUSB_ID_GROUND:
421 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
422 if (data->interface_type != MUSB_INTERFACE_UTMI)
423 break;
424 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
425
426 devctl |= MUSB_DEVCTL_SESSION;
427 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
428 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
429 MUSB_DEVCTL_BDEVICE) {
430 cpu_relax();
431
432 if (time_after(jiffies, timeout)) {
433 dev_err(dev, "configured as A device timeout");
434 break;
435 }
436 }
437 break;
438
439 case OMAP_MUSB_VBUS_VALID:
440 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
441 break;
442
443 default:
444 break;
445 }
446}
447
448static void omap2430_musb_disable(struct musb *musb)
449{
450 struct device *dev = musb->controller;
451 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
452
453 if (glue->status != OMAP_MUSB_UNKNOWN)
454 omap_control_usb_set_mode(glue->control_otghs,
455 USB_MODE_DISCONNECT);
456}
457
458static int omap2430_musb_exit(struct musb *musb)
459{
460 del_timer_sync(&musb_idle_timer);
461
462 omap2430_low_level_exit(musb);
463
464 return 0;
465}
466
467static const struct musb_platform_ops omap2430_ops = {
468 .init = omap2430_musb_init,
469 .exit = omap2430_musb_exit,
470
471 .set_mode = omap2430_musb_set_mode,
472 .try_idle = omap2430_musb_try_idle,
473
474 .set_vbus = omap2430_musb_set_vbus,
475
476 .enable = omap2430_musb_enable,
477 .disable = omap2430_musb_disable,
478};
479
480static u64 omap2430_dmamask = DMA_BIT_MASK(32);
481
482static int omap2430_probe(struct platform_device *pdev)
483{
484 struct resource musb_resources[3];
485 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
486 struct omap_musb_board_data *data;
487 struct platform_device *musb;
488 struct omap2430_glue *glue;
489 struct device_node *np = pdev->dev.of_node;
490 struct musb_hdrc_config *config;
491 int ret = -ENOMEM;
492
493 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
494 if (!glue) {
495 dev_err(&pdev->dev, "failed to allocate glue context\n");
496 goto err0;
497 }
498
499 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
500 if (!musb) {
501 dev_err(&pdev->dev, "failed to allocate musb device\n");
502 goto err0;
503 }
504
505 musb->dev.parent = &pdev->dev;
506 musb->dev.dma_mask = &omap2430_dmamask;
507 musb->dev.coherent_dma_mask = omap2430_dmamask;
508
509 glue->dev = &pdev->dev;
510 glue->musb = musb;
511 glue->status = OMAP_MUSB_UNKNOWN;
512
513 if (np) {
514 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
515 if (!pdata) {
516 dev_err(&pdev->dev,
517 "failed to allocate musb platform data\n");
518 goto err2;
519 }
520
521 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
522 if (!data) {
523 dev_err(&pdev->dev,
524 "failed to allocate musb board data\n");
525 goto err2;
526 }
527
528 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
529 if (!config) {
530 dev_err(&pdev->dev,
531 "failed to allocate musb hdrc config\n");
532 goto err2;
533 }
534
535 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
536 of_property_read_u32(np, "interface-type",
537 (u32 *)&data->interface_type);
538 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
539 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
540 of_property_read_u32(np, "power", (u32 *)&pdata->power);
541 config->multipoint = of_property_read_bool(np, "multipoint");
542 pdata->has_mailbox = of_property_read_bool(np,
543 "ti,has-mailbox");
544
545 pdata->board_data = data;
546 pdata->config = config;
547 }
548
549 if (pdata->has_mailbox) {
550 glue->control_otghs = omap_get_control_dev();
551 if (IS_ERR(glue->control_otghs)) {
552 dev_vdbg(&pdev->dev, "Failed to get control device\n");
553 ret = PTR_ERR(glue->control_otghs);
554 goto err2;
555 }
556 } else {
557 glue->control_otghs = ERR_PTR(-ENODEV);
558 }
559 pdata->platform_ops = &omap2430_ops;
560
561 platform_set_drvdata(pdev, glue);
562
563
564
565
566
567 _glue = glue;
568
569 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
570
571 memset(musb_resources, 0x00, sizeof(*musb_resources) *
572 ARRAY_SIZE(musb_resources));
573
574 musb_resources[0].name = pdev->resource[0].name;
575 musb_resources[0].start = pdev->resource[0].start;
576 musb_resources[0].end = pdev->resource[0].end;
577 musb_resources[0].flags = pdev->resource[0].flags;
578
579 musb_resources[1].name = pdev->resource[1].name;
580 musb_resources[1].start = pdev->resource[1].start;
581 musb_resources[1].end = pdev->resource[1].end;
582 musb_resources[1].flags = pdev->resource[1].flags;
583
584 musb_resources[2].name = pdev->resource[2].name;
585 musb_resources[2].start = pdev->resource[2].start;
586 musb_resources[2].end = pdev->resource[2].end;
587 musb_resources[2].flags = pdev->resource[2].flags;
588
589 ret = platform_device_add_resources(musb, musb_resources,
590 ARRAY_SIZE(musb_resources));
591 if (ret) {
592 dev_err(&pdev->dev, "failed to add resources\n");
593 goto err2;
594 }
595
596 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
597 if (ret) {
598 dev_err(&pdev->dev, "failed to add platform_data\n");
599 goto err2;
600 }
601
602 pm_runtime_enable(&pdev->dev);
603
604 ret = platform_device_add(musb);
605 if (ret) {
606 dev_err(&pdev->dev, "failed to register musb device\n");
607 goto err2;
608 }
609
610 return 0;
611
612err2:
613 platform_device_put(musb);
614
615err0:
616 return ret;
617}
618
619static int omap2430_remove(struct platform_device *pdev)
620{
621 struct omap2430_glue *glue = platform_get_drvdata(pdev);
622
623 cancel_work_sync(&glue->omap_musb_mailbox_work);
624 platform_device_unregister(glue->musb);
625
626 return 0;
627}
628
629#ifdef CONFIG_PM
630
631static int omap2430_runtime_suspend(struct device *dev)
632{
633 struct omap2430_glue *glue = dev_get_drvdata(dev);
634 struct musb *musb = glue_to_musb(glue);
635
636 if (musb) {
637 musb->context.otg_interfsel = musb_readl(musb->mregs,
638 OTG_INTERFSEL);
639
640 omap2430_low_level_exit(musb);
641 usb_phy_set_suspend(musb->xceiv, 1);
642 }
643
644 return 0;
645}
646
647static int omap2430_runtime_resume(struct device *dev)
648{
649 struct omap2430_glue *glue = dev_get_drvdata(dev);
650 struct musb *musb = glue_to_musb(glue);
651
652 if (musb) {
653 omap2430_low_level_init(musb);
654 musb_writel(musb->mregs, OTG_INTERFSEL,
655 musb->context.otg_interfsel);
656
657 usb_phy_set_suspend(musb->xceiv, 0);
658 }
659
660 return 0;
661}
662
663static struct dev_pm_ops omap2430_pm_ops = {
664 .runtime_suspend = omap2430_runtime_suspend,
665 .runtime_resume = omap2430_runtime_resume,
666};
667
668#define DEV_PM_OPS (&omap2430_pm_ops)
669#else
670#define DEV_PM_OPS NULL
671#endif
672
673#ifdef CONFIG_OF
674static const struct of_device_id omap2430_id_table[] = {
675 {
676 .compatible = "ti,omap4-musb"
677 },
678 {
679 .compatible = "ti,omap3-musb"
680 },
681 {},
682};
683MODULE_DEVICE_TABLE(of, omap2430_id_table);
684#endif
685
686static struct platform_driver omap2430_driver = {
687 .probe = omap2430_probe,
688 .remove = omap2430_remove,
689 .driver = {
690 .name = "musb-omap2430",
691 .pm = DEV_PM_OPS,
692 .of_match_table = of_match_ptr(omap2430_id_table),
693 },
694};
695
696MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
697MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
698MODULE_LICENSE("GPL v2");
699
700static int __init omap2430_init(void)
701{
702 return platform_driver_register(&omap2430_driver);
703}
704subsys_initcall(omap2430_init);
705
706static void __exit omap2430_exit(void)
707{
708 platform_driver_unregister(&omap2430_driver);
709}
710module_exit(omap2430_exit);
711
