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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
30struct 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
39static struct omap2430_glue *_glue;
40
41static 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
104static 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
114static 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
123static 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
143static 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
196static 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
204static 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
224static 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
291static 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
331static 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
341static 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
355static 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 .set_vbus = omap2430_musb_set_vbus,
365
366 .enable = omap2430_musb_enable,
367 .disable = omap2430_musb_disable,
368
369 .phy_callback = omap2430_musb_mailbox,
370};
371
372static u64 omap2430_dmamask = DMA_BIT_MASK(32);
373
374static int omap2430_probe(struct platform_device *pdev)
375{
376 struct resource musb_resources[3];
377 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
378 struct omap_musb_board_data *data;
379 struct platform_device *musb;
380 struct omap2430_glue *glue;
381 struct device_node *np = pdev->dev.of_node;
382 struct musb_hdrc_config *config;
383 struct device_node *control_node;
384 struct platform_device *control_pdev;
385 int ret = -ENOMEM, val;
386
387 if (!np)
388 return -ENODEV;
389
390 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
391 if (!glue)
392 goto err0;
393
394 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
395 if (!musb) {
396 dev_err(&pdev->dev, "failed to allocate musb device\n");
397 goto err0;
398 }
399
400 musb->dev.parent = &pdev->dev;
401 musb->dev.dma_mask = &omap2430_dmamask;
402 musb->dev.coherent_dma_mask = omap2430_dmamask;
403
404 glue->dev = &pdev->dev;
405 glue->musb = musb;
406 glue->status = MUSB_UNKNOWN;
407 glue->control_otghs = ERR_PTR(-ENODEV);
408
409 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
410 if (!pdata)
411 goto err2;
412
413 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
414 if (!data)
415 goto err2;
416
417 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
418 if (!config)
419 goto err2;
420
421 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
422 of_property_read_u32(np, "interface-type",
423 (u32 *)&data->interface_type);
424 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
425 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
426 of_property_read_u32(np, "power", (u32 *)&pdata->power);
427
428 ret = of_property_read_u32(np, "multipoint", &val);
429 if (!ret && val)
430 config->multipoint = true;
431
432 pdata->board_data = data;
433 pdata->config = config;
434
435 control_node = of_parse_phandle(np, "ctrl-module", 0);
436 if (control_node) {
437 control_pdev = of_find_device_by_node(control_node);
438 if (!control_pdev) {
439 dev_err(&pdev->dev, "Failed to get control device\n");
440 ret = -EINVAL;
441 goto err2;
442 }
443 glue->control_otghs = &control_pdev->dev;
444 }
445
446 pdata->platform_ops = &omap2430_ops;
447
448 platform_set_drvdata(pdev, glue);
449
450
451
452
453
454 _glue = glue;
455
456 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
457
458 memset(musb_resources, 0x00, sizeof(*musb_resources) *
459 ARRAY_SIZE(musb_resources));
460
461 musb_resources[0].name = pdev->resource[0].name;
462 musb_resources[0].start = pdev->resource[0].start;
463 musb_resources[0].end = pdev->resource[0].end;
464 musb_resources[0].flags = pdev->resource[0].flags;
465
466 musb_resources[1].name = pdev->resource[1].name;
467 musb_resources[1].start = pdev->resource[1].start;
468 musb_resources[1].end = pdev->resource[1].end;
469 musb_resources[1].flags = pdev->resource[1].flags;
470
471 musb_resources[2].name = pdev->resource[2].name;
472 musb_resources[2].start = pdev->resource[2].start;
473 musb_resources[2].end = pdev->resource[2].end;
474 musb_resources[2].flags = pdev->resource[2].flags;
475
476 ret = platform_device_add_resources(musb, musb_resources,
477 ARRAY_SIZE(musb_resources));
478 if (ret) {
479 dev_err(&pdev->dev, "failed to add resources\n");
480 goto err2;
481 }
482
483 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
484 if (ret) {
485 dev_err(&pdev->dev, "failed to add platform_data\n");
486 goto err2;
487 }
488
489 pm_runtime_enable(glue->dev);
490
491 ret = platform_device_add(musb);
492 if (ret) {
493 dev_err(&pdev->dev, "failed to register musb device\n");
494 goto err3;
495 }
496
497 return 0;
498
499err3:
500 pm_runtime_disable(glue->dev);
501
502err2:
503 platform_device_put(musb);
504
505err0:
506 return ret;
507}
508
509static int omap2430_remove(struct platform_device *pdev)
510{
511 struct omap2430_glue *glue = platform_get_drvdata(pdev);
512
513 platform_device_unregister(glue->musb);
514 pm_runtime_disable(glue->dev);
515
516 return 0;
517}
518
519#ifdef CONFIG_PM
520
521static int omap2430_runtime_suspend(struct device *dev)
522{
523 struct omap2430_glue *glue = dev_get_drvdata(dev);
524 struct musb *musb = glue_to_musb(glue);
525
526 if (!musb)
527 return 0;
528
529 musb->context.otg_interfsel = musb_readl(musb->mregs,
530 OTG_INTERFSEL);
531
532 omap2430_low_level_exit(musb);
533
534 phy_power_off(musb->phy);
535 phy_exit(musb->phy);
536
537 return 0;
538}
539
540static int omap2430_runtime_resume(struct device *dev)
541{
542 struct omap2430_glue *glue = dev_get_drvdata(dev);
543 struct musb *musb = glue_to_musb(glue);
544
545 if (!musb)
546 return 0;
547
548 phy_init(musb->phy);
549 phy_power_on(musb->phy);
550
551 omap2430_low_level_init(musb);
552 musb_writel(musb->mregs, OTG_INTERFSEL,
553 musb->context.otg_interfsel);
554
555 return 0;
556}
557
558static const struct dev_pm_ops omap2430_pm_ops = {
559 .runtime_suspend = omap2430_runtime_suspend,
560 .runtime_resume = omap2430_runtime_resume,
561};
562
563#define DEV_PM_OPS (&omap2430_pm_ops)
564#else
565#define DEV_PM_OPS NULL
566#endif
567
568#ifdef CONFIG_OF
569static const struct of_device_id omap2430_id_table[] = {
570 {
571 .compatible = "ti,omap4-musb"
572 },
573 {
574 .compatible = "ti,omap3-musb"
575 },
576 {},
577};
578MODULE_DEVICE_TABLE(of, omap2430_id_table);
579#endif
580
581static struct platform_driver omap2430_driver = {
582 .probe = omap2430_probe,
583 .remove = omap2430_remove,
584 .driver = {
585 .name = "musb-omap2430",
586 .pm = DEV_PM_OPS,
587 .of_match_table = of_match_ptr(omap2430_id_table),
588 },
589};
590
591module_platform_driver(omap2430_driver);
592
593MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
594MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
595MODULE_LICENSE("GPL v2");
596
