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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.h>
40#include <linux/phy/omap_control_phy.h>
41#include <linux/of_platform.h>
42
43#include "musb_core.h"
44#include "omap2430.h"
45
46struct omap2430_glue {
47 struct device *dev;
48 struct platform_device *musb;
49 enum musb_vbus_id_status status;
50 struct work_struct omap_musb_mailbox_work;
51 struct device *control_otghs;
52};
53#define glue_to_musb(g) platform_get_drvdata(g->musb)
54
55static struct omap2430_glue *_glue;
56
57static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
58{
59 struct usb_otg *otg = musb->xceiv->otg;
60 u8 devctl;
61 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
62
63
64
65
66
67 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
68
69 if (is_on) {
70 if (musb->xceiv->otg->state == OTG_STATE_A_IDLE) {
71 int loops = 100;
72
73 devctl |= MUSB_DEVCTL_SESSION;
74 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
75
76
77
78
79 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
80 MUSB_DEVCTL_BDEVICE) {
81
82 mdelay(5);
83 cpu_relax();
84
85 if (time_after(jiffies, timeout)
86 || loops-- <= 0) {
87 dev_err(musb->controller,
88 "configured as A device timeout");
89 break;
90 }
91 }
92
93 otg_set_vbus(otg, 1);
94 } else {
95 musb->is_active = 1;
96 otg->default_a = 1;
97 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
98 devctl |= MUSB_DEVCTL_SESSION;
99 MUSB_HST_MODE(musb);
100 }
101 } else {
102 musb->is_active = 0;
103
104
105
106
107
108 otg->default_a = 0;
109 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
110 devctl &= ~MUSB_DEVCTL_SESSION;
111
112 MUSB_DEV_MODE(musb);
113 }
114 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
115
116 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
117 "\n",
118 usb_otg_state_string(musb->xceiv->otg->state),
119 musb_readb(musb->mregs, MUSB_DEVCTL));
120}
121
122static inline void omap2430_low_level_exit(struct musb *musb)
123{
124 u32 l;
125
126
127 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
128 l |= ENABLEFORCE;
129 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
130}
131
132static inline void omap2430_low_level_init(struct musb *musb)
133{
134 u32 l;
135
136 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
137 l &= ~ENABLEFORCE;
138 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
139}
140
141static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
142{
143 struct omap2430_glue *glue = _glue;
144
145 if (!glue) {
146 pr_err("%s: musb core is not yet initialized\n", __func__);
147 return -EPROBE_DEFER;
148 }
149 glue->status = status;
150
151 if (!glue_to_musb(glue)) {
152 pr_err("%s: musb core is not yet ready\n", __func__);
153 return -EPROBE_DEFER;
154 }
155
156 schedule_work(&glue->omap_musb_mailbox_work);
157
158 return 0;
159}
160
161static void omap_musb_set_mailbox(struct omap2430_glue *glue)
162{
163 struct musb *musb = glue_to_musb(glue);
164 struct musb_hdrc_platform_data *pdata =
165 dev_get_platdata(musb->controller);
166 struct omap_musb_board_data *data = pdata->board_data;
167 struct usb_otg *otg = musb->xceiv->otg;
168
169 pm_runtime_get_sync(musb->controller);
170 switch (glue->status) {
171 case MUSB_ID_GROUND:
172 dev_dbg(musb->controller, "ID GND\n");
173
174 otg->default_a = true;
175 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
176 musb->xceiv->last_event = USB_EVENT_ID;
177 if (musb->gadget_driver) {
178 omap_control_usb_set_mode(glue->control_otghs,
179 USB_MODE_HOST);
180 omap2430_musb_set_vbus(musb, 1);
181 }
182 break;
183
184 case MUSB_VBUS_VALID:
185 dev_dbg(musb->controller, "VBUS Connect\n");
186
187 otg->default_a = false;
188 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
189 musb->xceiv->last_event = USB_EVENT_VBUS;
190 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
191 break;
192
193 case MUSB_ID_FLOAT:
194 case MUSB_VBUS_OFF:
195 dev_dbg(musb->controller, "VBUS Disconnect\n");
196
197 musb->xceiv->last_event = USB_EVENT_NONE;
198 if (musb->gadget_driver)
199 omap2430_musb_set_vbus(musb, 0);
200
201 if (data->interface_type == MUSB_INTERFACE_UTMI)
202 otg_set_vbus(musb->xceiv->otg, 0);
203
204 omap_control_usb_set_mode(glue->control_otghs,
205 USB_MODE_DISCONNECT);
206 break;
207 default:
208 dev_dbg(musb->controller, "ID float\n");
209 }
210 pm_runtime_mark_last_busy(musb->controller);
211 pm_runtime_put_autosuspend(musb->controller);
212 atomic_notifier_call_chain(&musb->xceiv->notifier,
213 musb->xceiv->last_event, NULL);
214}
215
216
217static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
218{
219 struct omap2430_glue *glue = container_of(mailbox_work,
220 struct omap2430_glue, omap_musb_mailbox_work);
221
222 omap_musb_set_mailbox(glue);
223}
224
225static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
226{
227 unsigned long flags;
228 irqreturn_t retval = IRQ_NONE;
229 struct musb *musb = __hci;
230
231 spin_lock_irqsave(&musb->lock, flags);
232
233 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
234 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
235 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
236
237 if (musb->int_usb || musb->int_tx || musb->int_rx)
238 retval = musb_interrupt(musb);
239
240 spin_unlock_irqrestore(&musb->lock, flags);
241
242 return retval;
243}
244
245static int omap2430_musb_init(struct musb *musb)
246{
247 u32 l;
248 int status = 0;
249 struct device *dev = musb->controller;
250 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
251 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
252 struct omap_musb_board_data *data = plat->board_data;
253
254
255
256
257
258 if (dev->parent->of_node) {
259 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
260
261
262
263
264
265
266
267 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
268 "usb-phy", 0);
269 } else {
270 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
271 musb->phy = devm_phy_get(dev, "usb");
272 }
273
274 if (IS_ERR(musb->xceiv)) {
275 status = PTR_ERR(musb->xceiv);
276
277 if (status == -ENXIO)
278 return status;
279
280 dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
281 return -EPROBE_DEFER;
282 }
283
284 if (IS_ERR(musb->phy)) {
285 dev_err(dev, "HS USB OTG: no PHY configured\n");
286 return PTR_ERR(musb->phy);
287 }
288 musb->isr = omap2430_musb_interrupt;
289 phy_init(musb->phy);
290 phy_power_on(musb->phy);
291
292 l = musb_readl(musb->mregs, OTG_INTERFSEL);
293
294 if (data->interface_type == MUSB_INTERFACE_UTMI) {
295
296 l &= ~ULPI_12PIN;
297 l |= UTMI_8BIT;
298 } else {
299 l |= ULPI_12PIN;
300 }
301
302 musb_writel(musb->mregs, OTG_INTERFSEL, l);
303
304 dev_dbg(dev, "HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
305 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
306 musb_readl(musb->mregs, OTG_REVISION),
307 musb_readl(musb->mregs, OTG_SYSCONFIG),
308 musb_readl(musb->mregs, OTG_SYSSTATUS),
309 musb_readl(musb->mregs, OTG_INTERFSEL),
310 musb_readl(musb->mregs, OTG_SIMENABLE));
311
312 if (glue->status != MUSB_UNKNOWN)
313 omap_musb_set_mailbox(glue);
314
315 return 0;
316}
317
318static void omap2430_musb_enable(struct musb *musb)
319{
320 u8 devctl;
321 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
322 struct device *dev = musb->controller;
323 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
324 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
325 struct omap_musb_board_data *data = pdata->board_data;
326
327
328 switch (glue->status) {
329
330 case MUSB_ID_GROUND:
331 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
332 if (data->interface_type != MUSB_INTERFACE_UTMI)
333 break;
334 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
335
336 devctl |= MUSB_DEVCTL_SESSION;
337 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
338 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
339 MUSB_DEVCTL_BDEVICE) {
340 cpu_relax();
341
342 if (time_after(jiffies, timeout)) {
343 dev_err(dev, "configured as A device timeout");
344 break;
345 }
346 }
347 break;
348
349 case MUSB_VBUS_VALID:
350 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
351 break;
352
353 default:
354 break;
355 }
356}
357
358static void omap2430_musb_disable(struct musb *musb)
359{
360 struct device *dev = musb->controller;
361 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
362
363 if (glue->status != MUSB_UNKNOWN)
364 omap_control_usb_set_mode(glue->control_otghs,
365 USB_MODE_DISCONNECT);
366}
367
368static int omap2430_musb_exit(struct musb *musb)
369{
370 struct device *dev = musb->controller;
371 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
372
373 omap2430_low_level_exit(musb);
374 phy_power_off(musb->phy);
375 phy_exit(musb->phy);
376 musb->phy = NULL;
377 cancel_work_sync(&glue->omap_musb_mailbox_work);
378
379 return 0;
380}
381
382static const struct musb_platform_ops omap2430_ops = {
383 .quirks = MUSB_DMA_INVENTRA,
384#ifdef CONFIG_USB_INVENTRA_DMA
385 .dma_init = musbhs_dma_controller_create,
386 .dma_exit = musbhs_dma_controller_destroy,
387#endif
388 .init = omap2430_musb_init,
389 .exit = omap2430_musb_exit,
390
391 .set_vbus = omap2430_musb_set_vbus,
392
393 .enable = omap2430_musb_enable,
394 .disable = omap2430_musb_disable,
395
396 .phy_callback = omap2430_musb_mailbox,
397};
398
399static u64 omap2430_dmamask = DMA_BIT_MASK(32);
400
401static int omap2430_probe(struct platform_device *pdev)
402{
403 struct resource musb_resources[3];
404 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
405 struct omap_musb_board_data *data;
406 struct platform_device *musb;
407 struct omap2430_glue *glue;
408 struct device_node *np = pdev->dev.of_node;
409 struct musb_hdrc_config *config;
410 int ret = -ENOMEM, val;
411
412 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
413 if (!glue)
414 goto err0;
415
416 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
417 if (!musb) {
418 dev_err(&pdev->dev, "failed to allocate musb device\n");
419 goto err0;
420 }
421
422 musb->dev.parent = &pdev->dev;
423 musb->dev.dma_mask = &omap2430_dmamask;
424 musb->dev.coherent_dma_mask = omap2430_dmamask;
425
426 glue->dev = &pdev->dev;
427 glue->musb = musb;
428 glue->status = MUSB_UNKNOWN;
429 glue->control_otghs = ERR_PTR(-ENODEV);
430
431 if (np) {
432 struct device_node *control_node;
433 struct platform_device *control_pdev;
434
435 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
436 if (!pdata)
437 goto err2;
438
439 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
440 if (!data)
441 goto err2;
442
443 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
444 if (!config)
445 goto err2;
446
447 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
448 of_property_read_u32(np, "interface-type",
449 (u32 *)&data->interface_type);
450 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
451 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
452 of_property_read_u32(np, "power", (u32 *)&pdata->power);
453
454 ret = of_property_read_u32(np, "multipoint", &val);
455 if (!ret && val)
456 config->multipoint = true;
457
458 pdata->board_data = data;
459 pdata->config = config;
460
461 control_node = of_parse_phandle(np, "ctrl-module", 0);
462 if (control_node) {
463 control_pdev = of_find_device_by_node(control_node);
464 if (!control_pdev) {
465 dev_err(&pdev->dev, "Failed to get control device\n");
466 ret = -EINVAL;
467 goto err2;
468 }
469 glue->control_otghs = &control_pdev->dev;
470 }
471 }
472 pdata->platform_ops = &omap2430_ops;
473
474 platform_set_drvdata(pdev, glue);
475
476
477
478
479
480 _glue = glue;
481
482 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
483
484 memset(musb_resources, 0x00, sizeof(*musb_resources) *
485 ARRAY_SIZE(musb_resources));
486
487 musb_resources[0].name = pdev->resource[0].name;
488 musb_resources[0].start = pdev->resource[0].start;
489 musb_resources[0].end = pdev->resource[0].end;
490 musb_resources[0].flags = pdev->resource[0].flags;
491
492 musb_resources[1].name = pdev->resource[1].name;
493 musb_resources[1].start = pdev->resource[1].start;
494 musb_resources[1].end = pdev->resource[1].end;
495 musb_resources[1].flags = pdev->resource[1].flags;
496
497 musb_resources[2].name = pdev->resource[2].name;
498 musb_resources[2].start = pdev->resource[2].start;
499 musb_resources[2].end = pdev->resource[2].end;
500 musb_resources[2].flags = pdev->resource[2].flags;
501
502 ret = platform_device_add_resources(musb, musb_resources,
503 ARRAY_SIZE(musb_resources));
504 if (ret) {
505 dev_err(&pdev->dev, "failed to add resources\n");
506 goto err2;
507 }
508
509 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
510 if (ret) {
511 dev_err(&pdev->dev, "failed to add platform_data\n");
512 goto err2;
513 }
514
515 pm_runtime_enable(glue->dev);
516
517 ret = platform_device_add(musb);
518 if (ret) {
519 dev_err(&pdev->dev, "failed to register musb device\n");
520 goto err3;
521 }
522
523 return 0;
524
525err3:
526 pm_runtime_disable(glue->dev);
527
528err2:
529 platform_device_put(musb);
530
531err0:
532 return ret;
533}
534
535static int omap2430_remove(struct platform_device *pdev)
536{
537 struct omap2430_glue *glue = platform_get_drvdata(pdev);
538
539 platform_device_unregister(glue->musb);
540 pm_runtime_disable(glue->dev);
541
542 return 0;
543}
544
545#ifdef CONFIG_PM
546
547static int omap2430_runtime_suspend(struct device *dev)
548{
549 struct omap2430_glue *glue = dev_get_drvdata(dev);
550 struct musb *musb = glue_to_musb(glue);
551
552 if (!musb)
553 return 0;
554
555 musb->context.otg_interfsel = musb_readl(musb->mregs,
556 OTG_INTERFSEL);
557
558 omap2430_low_level_exit(musb);
559
560 return 0;
561}
562
563static int omap2430_runtime_resume(struct device *dev)
564{
565 struct omap2430_glue *glue = dev_get_drvdata(dev);
566 struct musb *musb = glue_to_musb(glue);
567
568 if (!musb)
569 return 0;
570
571 omap2430_low_level_init(musb);
572 musb_writel(musb->mregs, OTG_INTERFSEL,
573 musb->context.otg_interfsel);
574
575 return 0;
576}
577
578static const struct dev_pm_ops omap2430_pm_ops = {
579 .runtime_suspend = omap2430_runtime_suspend,
580 .runtime_resume = omap2430_runtime_resume,
581};
582
583#define DEV_PM_OPS (&omap2430_pm_ops)
584#else
585#define DEV_PM_OPS NULL
586#endif
587
588#ifdef CONFIG_OF
589static const struct of_device_id omap2430_id_table[] = {
590 {
591 .compatible = "ti,omap4-musb"
592 },
593 {
594 .compatible = "ti,omap3-musb"
595 },
596 {},
597};
598MODULE_DEVICE_TABLE(of, omap2430_id_table);
599#endif
600
601static struct platform_driver omap2430_driver = {
602 .probe = omap2430_probe,
603 .remove = omap2430_remove,
604 .driver = {
605 .name = "musb-omap2430",
606 .pm = DEV_PM_OPS,
607 .of_match_table = of_match_ptr(omap2430_id_table),
608 },
609};
610
611module_platform_driver(omap2430_driver);
612
613MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
614MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
615MODULE_LICENSE("GPL v2");
616
