This source file includes following definitions.
- omap2430_musb_set_vbus
- omap2430_low_level_exit
- omap2430_low_level_init
- omap2430_musb_mailbox
- omap_musb_set_mailbox
- omap_musb_mailbox_work
- omap2430_musb_interrupt
- omap2430_musb_init
- omap2430_musb_enable
- omap2430_musb_disable
- omap2430_musb_exit
- omap2430_probe
- omap2430_remove
- omap2430_runtime_suspend
- omap2430_runtime_resume
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11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/sched.h>
14 #include <linux/init.h>
15 #include <linux/list.h>
16 #include <linux/io.h>
17 #include <linux/of.h>
18 #include <linux/platform_device.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/err.h>
22 #include <linux/delay.h>
23 #include <linux/usb/musb.h>
24 #include <linux/phy/omap_control_phy.h>
25 #include <linux/of_platform.h>
26
27 #include "musb_core.h"
28 #include "omap2430.h"
29
30 struct omap2430_glue {
31 struct device *dev;
32 struct platform_device *musb;
33 enum musb_vbus_id_status status;
34 struct work_struct omap_musb_mailbox_work;
35 struct device *control_otghs;
36 };
37 #define glue_to_musb(g) platform_get_drvdata(g->musb)
38
39 static struct omap2430_glue *_glue;
40
41 static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
42 {
43 struct usb_otg *otg = musb->xceiv->otg;
44 u8 devctl;
45 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
46
47
48
49
50
51 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
52
53 if (is_on) {
54 if (musb->xceiv->otg->state == OTG_STATE_A_IDLE) {
55 int loops = 100;
56
57 devctl |= MUSB_DEVCTL_SESSION;
58 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
59
60
61
62
63 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
64 MUSB_DEVCTL_BDEVICE) {
65
66 mdelay(5);
67 cpu_relax();
68
69 if (time_after(jiffies, timeout)
70 || loops-- <= 0) {
71 dev_err(musb->controller,
72 "configured as A device timeout");
73 break;
74 }
75 }
76
77 otg_set_vbus(otg, 1);
78 } else {
79 musb->is_active = 1;
80 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
81 devctl |= MUSB_DEVCTL_SESSION;
82 MUSB_HST_MODE(musb);
83 }
84 } else {
85 musb->is_active = 0;
86
87
88
89
90
91 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
92 devctl &= ~MUSB_DEVCTL_SESSION;
93
94 MUSB_DEV_MODE(musb);
95 }
96 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
97
98 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
99 "\n",
100 usb_otg_state_string(musb->xceiv->otg->state),
101 musb_readb(musb->mregs, MUSB_DEVCTL));
102 }
103
104 static inline void omap2430_low_level_exit(struct musb *musb)
105 {
106 u32 l;
107
108
109 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
110 l |= ENABLEFORCE;
111 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
112 }
113
114 static inline void omap2430_low_level_init(struct musb *musb)
115 {
116 u32 l;
117
118 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
119 l &= ~ENABLEFORCE;
120 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
121 }
122
123 static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
124 {
125 struct omap2430_glue *glue = _glue;
126
127 if (!glue) {
128 pr_err("%s: musb core is not yet initialized\n", __func__);
129 return -EPROBE_DEFER;
130 }
131 glue->status = status;
132
133 if (!glue_to_musb(glue)) {
134 pr_err("%s: musb core is not yet ready\n", __func__);
135 return -EPROBE_DEFER;
136 }
137
138 schedule_work(&glue->omap_musb_mailbox_work);
139
140 return 0;
141 }
142
143 static void omap_musb_set_mailbox(struct omap2430_glue *glue)
144 {
145 struct musb *musb = glue_to_musb(glue);
146 struct musb_hdrc_platform_data *pdata =
147 dev_get_platdata(musb->controller);
148 struct omap_musb_board_data *data = pdata->board_data;
149
150 pm_runtime_get_sync(musb->controller);
151 switch (glue->status) {
152 case MUSB_ID_GROUND:
153 dev_dbg(musb->controller, "ID GND\n");
154
155 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
156 musb->xceiv->last_event = USB_EVENT_ID;
157 if (musb->gadget_driver) {
158 omap_control_usb_set_mode(glue->control_otghs,
159 USB_MODE_HOST);
160 omap2430_musb_set_vbus(musb, 1);
161 }
162 break;
163
164 case MUSB_VBUS_VALID:
165 dev_dbg(musb->controller, "VBUS Connect\n");
166
167 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
168 musb->xceiv->last_event = USB_EVENT_VBUS;
169 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
170 break;
171
172 case MUSB_ID_FLOAT:
173 case MUSB_VBUS_OFF:
174 dev_dbg(musb->controller, "VBUS Disconnect\n");
175
176 musb->xceiv->last_event = USB_EVENT_NONE;
177 if (musb->gadget_driver)
178 omap2430_musb_set_vbus(musb, 0);
179
180 if (data->interface_type == MUSB_INTERFACE_UTMI)
181 otg_set_vbus(musb->xceiv->otg, 0);
182
183 omap_control_usb_set_mode(glue->control_otghs,
184 USB_MODE_DISCONNECT);
185 break;
186 default:
187 dev_dbg(musb->controller, "ID float\n");
188 }
189 pm_runtime_mark_last_busy(musb->controller);
190 pm_runtime_put_autosuspend(musb->controller);
191 atomic_notifier_call_chain(&musb->xceiv->notifier,
192 musb->xceiv->last_event, NULL);
193 }
194
195
196 static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
197 {
198 struct omap2430_glue *glue = container_of(mailbox_work,
199 struct omap2430_glue, omap_musb_mailbox_work);
200
201 omap_musb_set_mailbox(glue);
202 }
203
204 static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
205 {
206 unsigned long flags;
207 irqreturn_t retval = IRQ_NONE;
208 struct musb *musb = __hci;
209
210 spin_lock_irqsave(&musb->lock, flags);
211
212 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
213 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
214 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
215
216 if (musb->int_usb || musb->int_tx || musb->int_rx)
217 retval = musb_interrupt(musb);
218
219 spin_unlock_irqrestore(&musb->lock, flags);
220
221 return retval;
222 }
223
224 static int omap2430_musb_init(struct musb *musb)
225 {
226 u32 l;
227 int status = 0;
228 struct device *dev = musb->controller;
229 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
230 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
231 struct omap_musb_board_data *data = plat->board_data;
232
233
234
235
236
237 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
238
239
240
241
242
243
244
245 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);
246
247 if (IS_ERR(musb->xceiv)) {
248 status = PTR_ERR(musb->xceiv);
249
250 if (status == -ENXIO)
251 return status;
252
253 dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
254 return -EPROBE_DEFER;
255 }
256
257 if (IS_ERR(musb->phy)) {
258 dev_err(dev, "HS USB OTG: no PHY configured\n");
259 return PTR_ERR(musb->phy);
260 }
261 musb->isr = omap2430_musb_interrupt;
262 phy_init(musb->phy);
263 phy_power_on(musb->phy);
264
265 l = musb_readl(musb->mregs, OTG_INTERFSEL);
266
267 if (data->interface_type == MUSB_INTERFACE_UTMI) {
268
269 l &= ~ULPI_12PIN;
270 l |= UTMI_8BIT;
271 } else {
272 l |= ULPI_12PIN;
273 }
274
275 musb_writel(musb->mregs, OTG_INTERFSEL, l);
276
277 dev_dbg(dev, "HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
278 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
279 musb_readl(musb->mregs, OTG_REVISION),
280 musb_readl(musb->mregs, OTG_SYSCONFIG),
281 musb_readl(musb->mregs, OTG_SYSSTATUS),
282 musb_readl(musb->mregs, OTG_INTERFSEL),
283 musb_readl(musb->mregs, OTG_SIMENABLE));
284
285 if (glue->status != MUSB_UNKNOWN)
286 omap_musb_set_mailbox(glue);
287
288 return 0;
289 }
290
291 static void omap2430_musb_enable(struct musb *musb)
292 {
293 u8 devctl;
294 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
295 struct device *dev = musb->controller;
296 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
297 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
298 struct omap_musb_board_data *data = pdata->board_data;
299
300
301 switch (glue->status) {
302
303 case MUSB_ID_GROUND:
304 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
305 if (data->interface_type != MUSB_INTERFACE_UTMI)
306 break;
307 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
308
309 devctl |= MUSB_DEVCTL_SESSION;
310 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
311 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
312 MUSB_DEVCTL_BDEVICE) {
313 cpu_relax();
314
315 if (time_after(jiffies, timeout)) {
316 dev_err(dev, "configured as A device timeout");
317 break;
318 }
319 }
320 break;
321
322 case MUSB_VBUS_VALID:
323 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
324 break;
325
326 default:
327 break;
328 }
329 }
330
331 static void omap2430_musb_disable(struct musb *musb)
332 {
333 struct device *dev = musb->controller;
334 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
335
336 if (glue->status != MUSB_UNKNOWN)
337 omap_control_usb_set_mode(glue->control_otghs,
338 USB_MODE_DISCONNECT);
339 }
340
341 static int omap2430_musb_exit(struct musb *musb)
342 {
343 struct device *dev = musb->controller;
344 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
345
346 omap2430_low_level_exit(musb);
347 phy_power_off(musb->phy);
348 phy_exit(musb->phy);
349 musb->phy = NULL;
350 cancel_work_sync(&glue->omap_musb_mailbox_work);
351
352 return 0;
353 }
354
355 static const struct musb_platform_ops omap2430_ops = {
356 .quirks = MUSB_DMA_INVENTRA,
357 #ifdef CONFIG_USB_INVENTRA_DMA
358 .dma_init = musbhs_dma_controller_create,
359 .dma_exit = musbhs_dma_controller_destroy,
360 #endif
361 .init = omap2430_musb_init,
362 .exit = omap2430_musb_exit,
363
364 .enable = omap2430_musb_enable,
365 .disable = omap2430_musb_disable,
366
367 .phy_callback = omap2430_musb_mailbox,
368 };
369
370 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
371
372 static int omap2430_probe(struct platform_device *pdev)
373 {
374 struct resource musb_resources[3];
375 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
376 struct omap_musb_board_data *data;
377 struct platform_device *musb;
378 struct omap2430_glue *glue;
379 struct device_node *np = pdev->dev.of_node;
380 struct musb_hdrc_config *config;
381 struct device_node *control_node;
382 struct platform_device *control_pdev;
383 int ret = -ENOMEM, val;
384
385 if (!np)
386 return -ENODEV;
387
388 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
389 if (!glue)
390 goto err0;
391
392 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
393 if (!musb) {
394 dev_err(&pdev->dev, "failed to allocate musb device\n");
395 goto err0;
396 }
397
398 musb->dev.parent = &pdev->dev;
399 musb->dev.dma_mask = &omap2430_dmamask;
400 musb->dev.coherent_dma_mask = omap2430_dmamask;
401
402 glue->dev = &pdev->dev;
403 glue->musb = musb;
404 glue->status = MUSB_UNKNOWN;
405 glue->control_otghs = ERR_PTR(-ENODEV);
406
407 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
408 if (!pdata)
409 goto err2;
410
411 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
412 if (!data)
413 goto err2;
414
415 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
416 if (!config)
417 goto err2;
418
419 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
420 of_property_read_u32(np, "interface-type",
421 (u32 *)&data->interface_type);
422 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
423 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
424 of_property_read_u32(np, "power", (u32 *)&pdata->power);
425
426 ret = of_property_read_u32(np, "multipoint", &val);
427 if (!ret && val)
428 config->multipoint = true;
429
430 pdata->board_data = data;
431 pdata->config = config;
432
433 control_node = of_parse_phandle(np, "ctrl-module", 0);
434 if (control_node) {
435 control_pdev = of_find_device_by_node(control_node);
436 if (!control_pdev) {
437 dev_err(&pdev->dev, "Failed to get control device\n");
438 ret = -EINVAL;
439 goto err2;
440 }
441 glue->control_otghs = &control_pdev->dev;
442 }
443
444 pdata->platform_ops = &omap2430_ops;
445
446 platform_set_drvdata(pdev, glue);
447
448
449
450
451
452 _glue = glue;
453
454 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
455
456 memset(musb_resources, 0x00, sizeof(*musb_resources) *
457 ARRAY_SIZE(musb_resources));
458
459 musb_resources[0].name = pdev->resource[0].name;
460 musb_resources[0].start = pdev->resource[0].start;
461 musb_resources[0].end = pdev->resource[0].end;
462 musb_resources[0].flags = pdev->resource[0].flags;
463
464 musb_resources[1].name = pdev->resource[1].name;
465 musb_resources[1].start = pdev->resource[1].start;
466 musb_resources[1].end = pdev->resource[1].end;
467 musb_resources[1].flags = pdev->resource[1].flags;
468
469 musb_resources[2].name = pdev->resource[2].name;
470 musb_resources[2].start = pdev->resource[2].start;
471 musb_resources[2].end = pdev->resource[2].end;
472 musb_resources[2].flags = pdev->resource[2].flags;
473
474 ret = platform_device_add_resources(musb, musb_resources,
475 ARRAY_SIZE(musb_resources));
476 if (ret) {
477 dev_err(&pdev->dev, "failed to add resources\n");
478 goto err2;
479 }
480
481 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
482 if (ret) {
483 dev_err(&pdev->dev, "failed to add platform_data\n");
484 goto err2;
485 }
486
487 pm_runtime_enable(glue->dev);
488
489 ret = platform_device_add(musb);
490 if (ret) {
491 dev_err(&pdev->dev, "failed to register musb device\n");
492 goto err3;
493 }
494
495 return 0;
496
497 err3:
498 pm_runtime_disable(glue->dev);
499
500 err2:
501 platform_device_put(musb);
502
503 err0:
504 return ret;
505 }
506
507 static int omap2430_remove(struct platform_device *pdev)
508 {
509 struct omap2430_glue *glue = platform_get_drvdata(pdev);
510
511 platform_device_unregister(glue->musb);
512 pm_runtime_disable(glue->dev);
513
514 return 0;
515 }
516
517 #ifdef CONFIG_PM
518
519 static int omap2430_runtime_suspend(struct device *dev)
520 {
521 struct omap2430_glue *glue = dev_get_drvdata(dev);
522 struct musb *musb = glue_to_musb(glue);
523
524 if (!musb)
525 return 0;
526
527 musb->context.otg_interfsel = musb_readl(musb->mregs,
528 OTG_INTERFSEL);
529
530 omap2430_low_level_exit(musb);
531
532 phy_power_off(musb->phy);
533 phy_exit(musb->phy);
534
535 return 0;
536 }
537
538 static int omap2430_runtime_resume(struct device *dev)
539 {
540 struct omap2430_glue *glue = dev_get_drvdata(dev);
541 struct musb *musb = glue_to_musb(glue);
542
543 if (!musb)
544 return 0;
545
546 phy_init(musb->phy);
547 phy_power_on(musb->phy);
548
549 omap2430_low_level_init(musb);
550 musb_writel(musb->mregs, OTG_INTERFSEL,
551 musb->context.otg_interfsel);
552
553 return 0;
554 }
555
556 static const struct dev_pm_ops omap2430_pm_ops = {
557 .runtime_suspend = omap2430_runtime_suspend,
558 .runtime_resume = omap2430_runtime_resume,
559 };
560
561 #define DEV_PM_OPS (&omap2430_pm_ops)
562 #else
563 #define DEV_PM_OPS NULL
564 #endif
565
566 #ifdef CONFIG_OF
567 static const struct of_device_id omap2430_id_table[] = {
568 {
569 .compatible = "ti,omap4-musb"
570 },
571 {
572 .compatible = "ti,omap3-musb"
573 },
574 {},
575 };
576 MODULE_DEVICE_TABLE(of, omap2430_id_table);
577 #endif
578
579 static struct platform_driver omap2430_driver = {
580 .probe = omap2430_probe,
581 .remove = omap2430_remove,
582 .driver = {
583 .name = "musb-omap2430",
584 .pm = DEV_PM_OPS,
585 .of_match_table = of_match_ptr(omap2430_id_table),
586 },
587 };
588
589 module_platform_driver(omap2430_driver);
590
591 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
592 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
593 MODULE_LICENSE("GPL v2");