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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/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 struct timer_list musb_idle_timer;
58
59static void musb_do_idle(unsigned long _musb)
60{
61 struct musb *musb = (void *)_musb;
62 unsigned long flags;
63 u8 power;
64 u8 devctl;
65
66 spin_lock_irqsave(&musb->lock, flags);
67
68 switch (musb->xceiv->otg->state) {
69 case OTG_STATE_A_WAIT_BCON:
70
71 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
72 if (devctl & MUSB_DEVCTL_BDEVICE) {
73 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
74 MUSB_DEV_MODE(musb);
75 } else {
76 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
77 MUSB_HST_MODE(musb);
78 }
79 break;
80 case OTG_STATE_A_SUSPEND:
81 /* finish RESUME signaling? */
82 if (musb->port1_status & MUSB_PORT_STAT_RESUME) {
83 power = musb_readb(musb->mregs, MUSB_POWER);
84 power &= ~MUSB_POWER_RESUME;
85 dev_dbg(musb->controller, "root port resume stopped, power %02x\n", power);
86 musb_writeb(musb->mregs, MUSB_POWER, power);
87 musb->is_active = 1;
88 musb->port1_status &= ~(USB_PORT_STAT_SUSPEND
89 | MUSB_PORT_STAT_RESUME);
90 musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
91 usb_hcd_poll_rh_status(musb->hcd);
92 /* NOTE: it might really be A_WAIT_BCON ... */
93 musb->xceiv->otg->state = OTG_STATE_A_HOST;
94 }
95 break;
96 case OTG_STATE_A_HOST:
97 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
98 if (devctl & MUSB_DEVCTL_BDEVICE)
99 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
100 else
101 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
102 default:
103 break;
104 }
105 spin_unlock_irqrestore(&musb->lock, flags);
106}
107
108
109static void omap2430_musb_try_idle(struct musb *musb, unsigned long timeout)
110{
111 unsigned long default_timeout = jiffies + msecs_to_jiffies(3);
112 static unsigned long last_timer;
113
114 if (timeout == 0)
115 timeout = default_timeout;
116
117 /* Never idle if active, or when VBUS timeout is not set as host */
118 if (musb->is_active || ((musb->a_wait_bcon == 0)
119 && (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
120 dev_dbg(musb->controller, "%s active, deleting timer\n",
121 usb_otg_state_string(musb->xceiv->otg->state));
122 del_timer(&musb_idle_timer);
123 last_timer = jiffies;
124 return;
125 }
126
127 if (time_after(last_timer, timeout)) {
128 if (!timer_pending(&musb_idle_timer))
129 last_timer = timeout;
130 else {
131 dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
132 return;
133 }
134 }
135 last_timer = timeout;
136
137 dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
138 usb_otg_state_string(musb->xceiv->otg->state),
139 (unsigned long)jiffies_to_msecs(timeout - jiffies));
140 mod_timer(&musb_idle_timer, timeout);
141}
142
143static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
144{
145 struct usb_otg *otg = musb->xceiv->otg;
146 u8 devctl;
147 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
148 /* HDRC controls CPEN, but beware current surges during device
149 * connect. They can trigger transient overcurrent conditions
150 * that must be ignored.
151 */
152
153 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
154
155 if (is_on) {
156 if (musb->xceiv->otg->state == OTG_STATE_A_IDLE) {
157 int loops = 100;
158 /* start the session */
159 devctl |= MUSB_DEVCTL_SESSION;
160 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
161 /*
162 * Wait for the musb to set as A device to enable the
163 * VBUS
164 */
165 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
166 MUSB_DEVCTL_BDEVICE) {
167
168 mdelay(5);
169 cpu_relax();
170
171 if (time_after(jiffies, timeout)
172 || loops-- <= 0) {
173 dev_err(musb->controller,
174 "configured as A device timeout");
175 break;
176 }
177 }
178
179 otg_set_vbus(otg, 1);
180 } else {
181 musb->is_active = 1;
182 otg->default_a = 1;
183 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
184 devctl |= MUSB_DEVCTL_SESSION;
185 MUSB_HST_MODE(musb);
186 }
187 } else {
188 musb->is_active = 0;
189
190 /* NOTE: we're skipping A_WAIT_VFALL -> A_IDLE and
191 * jumping right to B_IDLE...
192 */
193
194 otg->default_a = 0;
195 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
196 devctl &= ~MUSB_DEVCTL_SESSION;
197
198 MUSB_DEV_MODE(musb);
199 }
200 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
201
202 dev_dbg(musb->controller, "VBUS %s, devctl %02x "
203 /* otg %3x conf %08x prcm %08x */ "\n",
204 usb_otg_state_string(musb->xceiv->otg->state),
205 musb_readb(musb->mregs, MUSB_DEVCTL));
206}
207
208static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
209{
210 u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
211
212 devctl |= MUSB_DEVCTL_SESSION;
213 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
214
215 return 0;
216}
217
218static inline void omap2430_low_level_exit(struct musb *musb)
219{
220 u32 l;
221
222 /* in any role */
223 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
224 l |= ENABLEFORCE; /* enable MSTANDBY */
225 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
226}
227
228static inline void omap2430_low_level_init(struct musb *musb)
229{
230 u32 l;
231
232 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
233 l &= ~ENABLEFORCE; /* disable MSTANDBY */
234 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
235}
236
237static void omap2430_musb_mailbox(enum musb_vbus_id_status status)
238{
239 struct omap2430_glue *glue = _glue;
240
241 if (!glue) {
242 pr_err("%s: musb core is not yet initialized\n", __func__);
243 return;
244 }
245 glue->status = status;
246
247 if (!glue_to_musb(glue)) {
248 pr_err("%s: musb core is not yet ready\n", __func__);
249 return;
250 }
251
252 schedule_work(&glue->omap_musb_mailbox_work);
253}
254
255static void omap_musb_set_mailbox(struct omap2430_glue *glue)
256{
257 struct musb *musb = glue_to_musb(glue);
258 struct device *dev = musb->controller;
259 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
260 struct omap_musb_board_data *data = pdata->board_data;
261 struct usb_otg *otg = musb->xceiv->otg;
262
263 switch (glue->status) {
264 case MUSB_ID_GROUND:
265 dev_dbg(dev, "ID GND\n");
266
267 otg->default_a = true;
268 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
269 musb->xceiv->last_event = USB_EVENT_ID;
270 if (musb->gadget_driver) {
271 pm_runtime_get_sync(dev);
272 omap_control_usb_set_mode(glue->control_otghs,
273 USB_MODE_HOST);
274 omap2430_musb_set_vbus(musb, 1);
275 }
276 break;
277
278 case MUSB_VBUS_VALID:
279 dev_dbg(dev, "VBUS Connect\n");
280
281 otg->default_a = false;
282 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
283 musb->xceiv->last_event = USB_EVENT_VBUS;
284 if (musb->gadget_driver)
285 pm_runtime_get_sync(dev);
286 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
287 break;
288
289 case MUSB_ID_FLOAT:
290 case MUSB_VBUS_OFF:
291 dev_dbg(dev, "VBUS Disconnect\n");
292
293 musb->xceiv->last_event = USB_EVENT_NONE;
294 if (musb->gadget_driver) {
295 omap2430_musb_set_vbus(musb, 0);
296 pm_runtime_mark_last_busy(dev);
297 pm_runtime_put_autosuspend(dev);
298 }
299
300 if (data->interface_type == MUSB_INTERFACE_UTMI)
301 otg_set_vbus(musb->xceiv->otg, 0);
302
303 omap_control_usb_set_mode(glue->control_otghs,
304 USB_MODE_DISCONNECT);
305 break;
306 default:
307 dev_dbg(dev, "ID float\n");
308 }
309
310 atomic_notifier_call_chain(&musb->xceiv->notifier,
311 musb->xceiv->last_event, NULL);
312}
313
314
315static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
316{
317 struct omap2430_glue *glue = container_of(mailbox_work,
318 struct omap2430_glue, omap_musb_mailbox_work);
319 struct musb *musb = glue_to_musb(glue);
320 struct device *dev = musb->controller;
321
322 pm_runtime_get_sync(dev);
323 omap_musb_set_mailbox(glue);
324 pm_runtime_mark_last_busy(dev);
325 pm_runtime_put_autosuspend(dev);
326}
327
328static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
329{
330 unsigned long flags;
331 irqreturn_t retval = IRQ_NONE;
332 struct musb *musb = __hci;
333
334 spin_lock_irqsave(&musb->lock, flags);
335
336 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
337 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
338 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
339
340 if (musb->int_usb || musb->int_tx || musb->int_rx)
341 retval = musb_interrupt(musb);
342
343 spin_unlock_irqrestore(&musb->lock, flags);
344
345 return retval;
346}
347
348static int omap2430_musb_init(struct musb *musb)
349{
350 u32 l;
351 int status = 0;
352 struct device *dev = musb->controller;
353 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
354 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
355 struct omap_musb_board_data *data = plat->board_data;
356
357 /* We require some kind of external transceiver, hooked
358 * up through ULPI. TWL4030-family PMICs include one,
359 * which needs a driver, drivers aren't always needed.
360 */
361 if (dev->parent->of_node) {
362 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
363
364 /* We can't totally remove musb->xceiv as of now because
365 * musb core uses xceiv.state and xceiv.otg. Once we have
366 * a separate state machine to handle otg, these can be moved
367 * out of xceiv and then we can start using the generic PHY
368 * framework
369 */
370 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent,
371 "usb-phy", 0);
372 } else {
373 musb->xceiv = devm_usb_get_phy_dev(dev, 0);
374 musb->phy = devm_phy_get(dev, "usb");
375 }
376
377 if (IS_ERR(musb->xceiv)) {
378 status = PTR_ERR(musb->xceiv);
379
380 if (status == -ENXIO)
381 return status;
382
383 pr_err("HS USB OTG: no transceiver configured\n");
384 return -EPROBE_DEFER;
385 }
386
387 if (IS_ERR(musb->phy)) {
388 pr_err("HS USB OTG: no PHY configured\n");
389 return PTR_ERR(musb->phy);
390 }
391 musb->isr = omap2430_musb_interrupt;
392
393 /*
394 * Enable runtime PM for musb parent (this driver). We can't
395 * do it earlier as struct musb is not yet allocated and we
396 * need to touch the musb registers for runtime PM.
397 */
398 pm_runtime_enable(glue->dev);
399 status = pm_runtime_get_sync(glue->dev);
400 if (status < 0)
401 goto err1;
402
403 status = pm_runtime_get_sync(dev);
404 if (status < 0) {
405 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
406 pm_runtime_put_sync(glue->dev);
407 goto err1;
408 }
409
410 l = musb_readl(musb->mregs, OTG_INTERFSEL);
411
412 if (data->interface_type == MUSB_INTERFACE_UTMI) {
413 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
414 l &= ~ULPI_12PIN; /* Disable ULPI */
415 l |= UTMI_8BIT; /* Enable UTMI */
416 } else {
417 l |= ULPI_12PIN;
418 }
419
420 musb_writel(musb->mregs, OTG_INTERFSEL, l);
421
422 pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
423 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
424 musb_readl(musb->mregs, OTG_REVISION),
425 musb_readl(musb->mregs, OTG_SYSCONFIG),
426 musb_readl(musb->mregs, OTG_SYSSTATUS),
427 musb_readl(musb->mregs, OTG_INTERFSEL),
428 musb_readl(musb->mregs, OTG_SIMENABLE));
429
430 setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
431
432 if (glue->status != MUSB_UNKNOWN)
433 omap_musb_set_mailbox(glue);
434
435 phy_init(musb->phy);
436 phy_power_on(musb->phy);
437
438 pm_runtime_put_noidle(musb->controller);
439 pm_runtime_put_noidle(glue->dev);
440 return 0;
441
442err1:
443 return status;
444}
445
446static void omap2430_musb_enable(struct musb *musb)
447{
448 u8 devctl;
449 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
450 struct device *dev = musb->controller;
451 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
452 struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
453 struct omap_musb_board_data *data = pdata->board_data;
454
455 switch (glue->status) {
456
457 case MUSB_ID_GROUND:
458 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
459 if (data->interface_type != MUSB_INTERFACE_UTMI)
460 break;
461 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
462 /* start the session */
463 devctl |= MUSB_DEVCTL_SESSION;
464 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
465 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
466 MUSB_DEVCTL_BDEVICE) {
467 cpu_relax();
468
469 if (time_after(jiffies, timeout)) {
470 dev_err(dev, "configured as A device timeout");
471 break;
472 }
473 }
474 break;
475
476 case MUSB_VBUS_VALID:
477 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
478 break;
479
480 default:
481 break;
482 }
483}
484
485static void omap2430_musb_disable(struct musb *musb)
486{
487 struct device *dev = musb->controller;
488 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
489
490 if (glue->status != MUSB_UNKNOWN)
491 omap_control_usb_set_mode(glue->control_otghs,
492 USB_MODE_DISCONNECT);
493}
494
495static int omap2430_musb_exit(struct musb *musb)
496{
497 del_timer_sync(&musb_idle_timer);
498
499 omap2430_low_level_exit(musb);
500 phy_power_off(musb->phy);
501 phy_exit(musb->phy);
502
503 return 0;
504}
505
506static const struct musb_platform_ops omap2430_ops = {
507 .quirks = MUSB_DMA_INVENTRA,
508#ifdef CONFIG_USB_INVENTRA_DMA
509 .dma_init = musbhs_dma_controller_create,
510 .dma_exit = musbhs_dma_controller_destroy,
511#endif
512 .init = omap2430_musb_init,
513 .exit = omap2430_musb_exit,
514
515 .set_mode = omap2430_musb_set_mode,
516 .try_idle = omap2430_musb_try_idle,
517
518 .set_vbus = omap2430_musb_set_vbus,
519
520 .enable = omap2430_musb_enable,
521 .disable = omap2430_musb_disable,
522
523 .phy_callback = omap2430_musb_mailbox,
524};
525
526static u64 omap2430_dmamask = DMA_BIT_MASK(32);
527
528static int omap2430_probe(struct platform_device *pdev)
529{
530 struct resource musb_resources[3];
531 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
532 struct omap_musb_board_data *data;
533 struct platform_device *musb;
534 struct omap2430_glue *glue;
535 struct device_node *np = pdev->dev.of_node;
536 struct musb_hdrc_config *config;
537 int ret = -ENOMEM, val;
538
539 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
540 if (!glue)
541 goto err0;
542
543 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
544 if (!musb) {
545 dev_err(&pdev->dev, "failed to allocate musb device\n");
546 goto err0;
547 }
548
549 musb->dev.parent = &pdev->dev;
550 musb->dev.dma_mask = &omap2430_dmamask;
551 musb->dev.coherent_dma_mask = omap2430_dmamask;
552
553 glue->dev = &pdev->dev;
554 glue->musb = musb;
555 glue->status = MUSB_UNKNOWN;
556 glue->control_otghs = ERR_PTR(-ENODEV);
557
558 if (np) {
559 struct device_node *control_node;
560 struct platform_device *control_pdev;
561
562 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
563 if (!pdata)
564 goto err2;
565
566 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
567 if (!data)
568 goto err2;
569
570 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
571 if (!config)
572 goto err2;
573
574 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
575 of_property_read_u32(np, "interface-type",
576 (u32 *)&data->interface_type);
577 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
578 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
579 of_property_read_u32(np, "power", (u32 *)&pdata->power);
580
581 ret = of_property_read_u32(np, "multipoint", &val);
582 if (!ret && val)
583 config->multipoint = true;
584
585 pdata->board_data = data;
586 pdata->config = config;
587
588 control_node = of_parse_phandle(np, "ctrl-module", 0);
589 if (control_node) {
590 control_pdev = of_find_device_by_node(control_node);
591 if (!control_pdev) {
592 dev_err(&pdev->dev, "Failed to get control device\n");
593 ret = -EINVAL;
594 goto err2;
595 }
596 glue->control_otghs = &control_pdev->dev;
597 }
598 }
599 pdata->platform_ops = &omap2430_ops;
600
601 platform_set_drvdata(pdev, glue);
602
603 /*
604 * REVISIT if we ever have two instances of the wrapper, we will be
605 * in big trouble
606 */
607 _glue = glue;
608
609 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
610
611 memset(musb_resources, 0x00, sizeof(*musb_resources) *
612 ARRAY_SIZE(musb_resources));
613
614 musb_resources[0].name = pdev->resource[0].name;
615 musb_resources[0].start = pdev->resource[0].start;
616 musb_resources[0].end = pdev->resource[0].end;
617 musb_resources[0].flags = pdev->resource[0].flags;
618
619 musb_resources[1].name = pdev->resource[1].name;
620 musb_resources[1].start = pdev->resource[1].start;
621 musb_resources[1].end = pdev->resource[1].end;
622 musb_resources[1].flags = pdev->resource[1].flags;
623
624 musb_resources[2].name = pdev->resource[2].name;
625 musb_resources[2].start = pdev->resource[2].start;
626 musb_resources[2].end = pdev->resource[2].end;
627 musb_resources[2].flags = pdev->resource[2].flags;
628
629 ret = platform_device_add_resources(musb, musb_resources,
630 ARRAY_SIZE(musb_resources));
631 if (ret) {
632 dev_err(&pdev->dev, "failed to add resources\n");
633 goto err2;
634 }
635
636 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
637 if (ret) {
638 dev_err(&pdev->dev, "failed to add platform_data\n");
639 goto err2;
640 }
641
642 /*
643 * Note that we cannot enable PM runtime yet for this
644 * driver as we need struct musb initialized first.
645 * See omap2430_musb_init above.
646 */
647
648 ret = platform_device_add(musb);
649 if (ret) {
650 dev_err(&pdev->dev, "failed to register musb device\n");
651 goto err2;
652 }
653
654 return 0;
655
656err2:
657 platform_device_put(musb);
658
659err0:
660 return ret;
661}
662
663static int omap2430_remove(struct platform_device *pdev)
664{
665 struct omap2430_glue *glue = platform_get_drvdata(pdev);
666
667 pm_runtime_get_sync(glue->dev);
668 cancel_work_sync(&glue->omap_musb_mailbox_work);
669 platform_device_unregister(glue->musb);
670 pm_runtime_put_sync(glue->dev);
671 pm_runtime_disable(glue->dev);
672
673 return 0;
674}
675
676#ifdef CONFIG_PM
677
678static int omap2430_runtime_suspend(struct device *dev)
679{
680 struct omap2430_glue *glue = dev_get_drvdata(dev);
681 struct musb *musb = glue_to_musb(glue);
682
683 if (musb) {
684 musb->context.otg_interfsel = musb_readl(musb->mregs,
685 OTG_INTERFSEL);
686
687 omap2430_low_level_exit(musb);
688 }
689
690 return 0;
691}
692
693static int omap2430_runtime_resume(struct device *dev)
694{
695 struct omap2430_glue *glue = dev_get_drvdata(dev);
696 struct musb *musb = glue_to_musb(glue);
697
698 if (!musb)
699 return -EPROBE_DEFER;
700
701 omap2430_low_level_init(musb);
702 musb_writel(musb->mregs, OTG_INTERFSEL,
703 musb->context.otg_interfsel);
704
705 return 0;
706}
707
708static struct dev_pm_ops omap2430_pm_ops = {
709 .runtime_suspend = omap2430_runtime_suspend,
710 .runtime_resume = omap2430_runtime_resume,
711};
712
713#define DEV_PM_OPS (&omap2430_pm_ops)
714#else
715#define DEV_PM_OPS NULL
716#endif
717
718#ifdef CONFIG_OF
719static const struct of_device_id omap2430_id_table[] = {
720 {
721 .compatible = "ti,omap4-musb"
722 },
723 {
724 .compatible = "ti,omap3-musb"
725 },
726 {},
727};
728MODULE_DEVICE_TABLE(of, omap2430_id_table);
729#endif
730
731static struct platform_driver omap2430_driver = {
732 .probe = omap2430_probe,
733 .remove = omap2430_remove,
734 .driver = {
735 .name = "musb-omap2430",
736 .pm = DEV_PM_OPS,
737 .of_match_table = of_match_ptr(omap2430_id_table),
738 },
739};
740
741MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
742MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
743MODULE_LICENSE("GPL v2");
744
745static int __init omap2430_init(void)
746{
747 return platform_driver_register(&omap2430_driver);
748}
749subsys_initcall(omap2430_init);
750
751static void __exit omap2430_exit(void)
752{
753 platform_driver_unregister(&omap2430_driver);
754}
755module_exit(omap2430_exit);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2005-2007 by Texas Instruments
4 * Some code has been taken from tusb6010.c
5 * Copyrights for that are attributable to:
6 * Copyright (C) 2006 Nokia Corporation
7 * Tony Lindgren <tony@atomide.com>
8 *
9 * This file is part of the Inventra Controller Driver for Linux.
10 */
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 inline void omap2430_low_level_exit(struct musb *musb)
42{
43 u32 l;
44
45 /* in any role */
46 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
47 l |= ENABLEFORCE; /* enable MSTANDBY */
48 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
49}
50
51static inline void omap2430_low_level_init(struct musb *musb)
52{
53 u32 l;
54
55 l = musb_readl(musb->mregs, OTG_FORCESTDBY);
56 l &= ~ENABLEFORCE; /* disable MSTANDBY */
57 musb_writel(musb->mregs, OTG_FORCESTDBY, l);
58}
59
60static int omap2430_musb_mailbox(enum musb_vbus_id_status status)
61{
62 struct omap2430_glue *glue = _glue;
63
64 if (!glue) {
65 pr_err("%s: musb core is not yet initialized\n", __func__);
66 return -EPROBE_DEFER;
67 }
68 glue->status = status;
69
70 if (!glue_to_musb(glue)) {
71 pr_err("%s: musb core is not yet ready\n", __func__);
72 return -EPROBE_DEFER;
73 }
74
75 schedule_work(&glue->omap_musb_mailbox_work);
76
77 return 0;
78}
79
80/*
81 * HDRC controls CPEN, but beware current surges during device connect.
82 * They can trigger transient overcurrent conditions that must be ignored.
83 *
84 * Note that we're skipping A_WAIT_VFALL -> A_IDLE and jumping right to B_IDLE
85 * as set by musb_set_peripheral().
86 */
87static void omap_musb_set_mailbox(struct omap2430_glue *glue)
88{
89 struct musb *musb = glue_to_musb(glue);
90 int error;
91
92 pm_runtime_get_sync(musb->controller);
93
94 dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",
95 usb_otg_state_string(musb->xceiv->otg->state),
96 musb_readb(musb->mregs, MUSB_DEVCTL));
97
98 switch (glue->status) {
99 case MUSB_ID_GROUND:
100 dev_dbg(musb->controller, "ID GND\n");
101 switch (musb->xceiv->otg->state) {
102 case OTG_STATE_A_IDLE:
103 error = musb_set_host(musb);
104 if (error)
105 break;
106 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
107 fallthrough;
108 case OTG_STATE_A_WAIT_VRISE:
109 case OTG_STATE_A_WAIT_BCON:
110 case OTG_STATE_A_HOST:
111 /*
112 * On multiple ID ground interrupts just keep enabling
113 * VBUS. At least cpcap VBUS shuts down otherwise.
114 */
115 otg_set_vbus(musb->xceiv->otg, 1);
116 break;
117 default:
118 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
119 musb->xceiv->last_event = USB_EVENT_ID;
120 if (musb->gadget_driver) {
121 omap_control_usb_set_mode(glue->control_otghs,
122 USB_MODE_HOST);
123 otg_set_vbus(musb->xceiv->otg, 1);
124 }
125 break;
126 }
127 break;
128
129 case MUSB_VBUS_VALID:
130 dev_dbg(musb->controller, "VBUS Connect\n");
131
132 musb->xceiv->otg->state = OTG_STATE_B_IDLE;
133 musb->xceiv->last_event = USB_EVENT_VBUS;
134 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
135 break;
136
137 case MUSB_ID_FLOAT:
138 case MUSB_VBUS_OFF:
139 dev_dbg(musb->controller, "VBUS Disconnect\n");
140
141 musb->xceiv->last_event = USB_EVENT_NONE;
142 musb_set_peripheral(musb);
143 otg_set_vbus(musb->xceiv->otg, 0);
144 omap_control_usb_set_mode(glue->control_otghs,
145 USB_MODE_DISCONNECT);
146 break;
147 default:
148 dev_dbg(musb->controller, "ID float\n");
149 }
150 pm_runtime_mark_last_busy(musb->controller);
151 pm_runtime_put_autosuspend(musb->controller);
152 atomic_notifier_call_chain(&musb->xceiv->notifier,
153 musb->xceiv->last_event, NULL);
154}
155
156
157static void omap_musb_mailbox_work(struct work_struct *mailbox_work)
158{
159 struct omap2430_glue *glue = container_of(mailbox_work,
160 struct omap2430_glue, omap_musb_mailbox_work);
161
162 omap_musb_set_mailbox(glue);
163}
164
165static irqreturn_t omap2430_musb_interrupt(int irq, void *__hci)
166{
167 unsigned long flags;
168 irqreturn_t retval = IRQ_NONE;
169 struct musb *musb = __hci;
170
171 spin_lock_irqsave(&musb->lock, flags);
172
173 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
174 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
175 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
176
177 if (musb->int_usb || musb->int_tx || musb->int_rx)
178 retval = musb_interrupt(musb);
179
180 spin_unlock_irqrestore(&musb->lock, flags);
181
182 return retval;
183}
184
185static int omap2430_musb_init(struct musb *musb)
186{
187 u32 l;
188 int status = 0;
189 struct device *dev = musb->controller;
190 struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
191 struct omap_musb_board_data *data = plat->board_data;
192
193 /* We require some kind of external transceiver, hooked
194 * up through ULPI. TWL4030-family PMICs include one,
195 * which needs a driver, drivers aren't always needed.
196 */
197 musb->phy = devm_phy_get(dev->parent, "usb2-phy");
198
199 /* We can't totally remove musb->xceiv as of now because
200 * musb core uses xceiv.state and xceiv.otg. Once we have
201 * a separate state machine to handle otg, these can be moved
202 * out of xceiv and then we can start using the generic PHY
203 * framework
204 */
205 musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "usb-phy", 0);
206
207 if (IS_ERR(musb->xceiv)) {
208 status = PTR_ERR(musb->xceiv);
209
210 if (status == -ENXIO)
211 return status;
212
213 dev_dbg(dev, "HS USB OTG: no transceiver configured\n");
214 return -EPROBE_DEFER;
215 }
216
217 if (IS_ERR(musb->phy)) {
218 dev_err(dev, "HS USB OTG: no PHY configured\n");
219 return PTR_ERR(musb->phy);
220 }
221 musb->isr = omap2430_musb_interrupt;
222 phy_init(musb->phy);
223 phy_power_on(musb->phy);
224
225 l = musb_readl(musb->mregs, OTG_INTERFSEL);
226
227 if (data->interface_type == MUSB_INTERFACE_UTMI) {
228 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
229 l &= ~ULPI_12PIN; /* Disable ULPI */
230 l |= UTMI_8BIT; /* Enable UTMI */
231 } else {
232 l |= ULPI_12PIN;
233 }
234
235 musb_writel(musb->mregs, OTG_INTERFSEL, l);
236
237 dev_dbg(dev, "HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
238 "sysstatus 0x%x, intrfsel 0x%x, simenable 0x%x\n",
239 musb_readl(musb->mregs, OTG_REVISION),
240 musb_readl(musb->mregs, OTG_SYSCONFIG),
241 musb_readl(musb->mregs, OTG_SYSSTATUS),
242 musb_readl(musb->mregs, OTG_INTERFSEL),
243 musb_readl(musb->mregs, OTG_SIMENABLE));
244
245 return 0;
246}
247
248static void omap2430_musb_enable(struct musb *musb)
249{
250 struct device *dev = musb->controller;
251 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
252
253 if (glue->status == MUSB_UNKNOWN)
254 glue->status = MUSB_VBUS_OFF;
255 omap_musb_set_mailbox(glue);
256}
257
258static void omap2430_musb_disable(struct musb *musb)
259{
260 struct device *dev = musb->controller;
261 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
262
263 if (glue->status != MUSB_UNKNOWN)
264 omap_control_usb_set_mode(glue->control_otghs,
265 USB_MODE_DISCONNECT);
266}
267
268static int omap2430_musb_exit(struct musb *musb)
269{
270 struct device *dev = musb->controller;
271 struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
272
273 omap2430_low_level_exit(musb);
274 phy_power_off(musb->phy);
275 phy_exit(musb->phy);
276 musb->phy = NULL;
277 cancel_work_sync(&glue->omap_musb_mailbox_work);
278
279 return 0;
280}
281
282static const struct musb_platform_ops omap2430_ops = {
283 .quirks = MUSB_DMA_INVENTRA,
284#ifdef CONFIG_USB_INVENTRA_DMA
285 .dma_init = musbhs_dma_controller_create,
286 .dma_exit = musbhs_dma_controller_destroy,
287#endif
288 .init = omap2430_musb_init,
289 .exit = omap2430_musb_exit,
290
291 .enable = omap2430_musb_enable,
292 .disable = omap2430_musb_disable,
293
294 .phy_callback = omap2430_musb_mailbox,
295};
296
297static u64 omap2430_dmamask = DMA_BIT_MASK(32);
298
299static int omap2430_probe(struct platform_device *pdev)
300{
301 struct resource musb_resources[3];
302 struct musb_hdrc_platform_data *pdata = dev_get_platdata(&pdev->dev);
303 struct omap_musb_board_data *data;
304 struct platform_device *musb;
305 struct omap2430_glue *glue;
306 struct device_node *np = pdev->dev.of_node;
307 struct musb_hdrc_config *config;
308 struct device_node *control_node;
309 struct platform_device *control_pdev;
310 int ret = -ENOMEM, val;
311
312 if (!np)
313 return -ENODEV;
314
315 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
316 if (!glue)
317 goto err0;
318
319 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
320 if (!musb) {
321 dev_err(&pdev->dev, "failed to allocate musb device\n");
322 goto err0;
323 }
324
325 musb->dev.parent = &pdev->dev;
326 musb->dev.dma_mask = &omap2430_dmamask;
327 musb->dev.coherent_dma_mask = omap2430_dmamask;
328
329 glue->dev = &pdev->dev;
330 glue->musb = musb;
331 glue->status = MUSB_UNKNOWN;
332 glue->control_otghs = ERR_PTR(-ENODEV);
333
334 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
335 if (!pdata)
336 goto err2;
337
338 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
339 if (!data)
340 goto err2;
341
342 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
343 if (!config)
344 goto err2;
345
346 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
347 of_property_read_u32(np, "interface-type",
348 (u32 *)&data->interface_type);
349 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
350 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
351 of_property_read_u32(np, "power", (u32 *)&pdata->power);
352
353 ret = of_property_read_u32(np, "multipoint", &val);
354 if (!ret && val)
355 config->multipoint = true;
356
357 pdata->board_data = data;
358 pdata->config = config;
359
360 control_node = of_parse_phandle(np, "ctrl-module", 0);
361 if (control_node) {
362 control_pdev = of_find_device_by_node(control_node);
363 if (!control_pdev) {
364 dev_err(&pdev->dev, "Failed to get control device\n");
365 ret = -EINVAL;
366 goto err2;
367 }
368 glue->control_otghs = &control_pdev->dev;
369 }
370
371 pdata->platform_ops = &omap2430_ops;
372
373 platform_set_drvdata(pdev, glue);
374
375 /*
376 * REVISIT if we ever have two instances of the wrapper, we will be
377 * in big trouble
378 */
379 _glue = glue;
380
381 INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
382
383 memset(musb_resources, 0x00, sizeof(*musb_resources) *
384 ARRAY_SIZE(musb_resources));
385
386 musb_resources[0].name = pdev->resource[0].name;
387 musb_resources[0].start = pdev->resource[0].start;
388 musb_resources[0].end = pdev->resource[0].end;
389 musb_resources[0].flags = pdev->resource[0].flags;
390
391 musb_resources[1].name = pdev->resource[1].name;
392 musb_resources[1].start = pdev->resource[1].start;
393 musb_resources[1].end = pdev->resource[1].end;
394 musb_resources[1].flags = pdev->resource[1].flags;
395
396 musb_resources[2].name = pdev->resource[2].name;
397 musb_resources[2].start = pdev->resource[2].start;
398 musb_resources[2].end = pdev->resource[2].end;
399 musb_resources[2].flags = pdev->resource[2].flags;
400
401 ret = platform_device_add_resources(musb, musb_resources,
402 ARRAY_SIZE(musb_resources));
403 if (ret) {
404 dev_err(&pdev->dev, "failed to add resources\n");
405 goto err2;
406 }
407
408 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
409 if (ret) {
410 dev_err(&pdev->dev, "failed to add platform_data\n");
411 goto err2;
412 }
413
414 pm_runtime_enable(glue->dev);
415
416 ret = platform_device_add(musb);
417 if (ret) {
418 dev_err(&pdev->dev, "failed to register musb device\n");
419 goto err3;
420 }
421
422 return 0;
423
424err3:
425 pm_runtime_disable(glue->dev);
426
427err2:
428 platform_device_put(musb);
429
430err0:
431 return ret;
432}
433
434static int omap2430_remove(struct platform_device *pdev)
435{
436 struct omap2430_glue *glue = platform_get_drvdata(pdev);
437
438 platform_device_unregister(glue->musb);
439 pm_runtime_disable(glue->dev);
440
441 return 0;
442}
443
444#ifdef CONFIG_PM
445
446static int omap2430_runtime_suspend(struct device *dev)
447{
448 struct omap2430_glue *glue = dev_get_drvdata(dev);
449 struct musb *musb = glue_to_musb(glue);
450
451 if (!musb)
452 return 0;
453
454 musb->context.otg_interfsel = musb_readl(musb->mregs,
455 OTG_INTERFSEL);
456
457 omap2430_low_level_exit(musb);
458
459 phy_power_off(musb->phy);
460 phy_exit(musb->phy);
461
462 return 0;
463}
464
465static int omap2430_runtime_resume(struct device *dev)
466{
467 struct omap2430_glue *glue = dev_get_drvdata(dev);
468 struct musb *musb = glue_to_musb(glue);
469
470 if (!musb)
471 return 0;
472
473 phy_init(musb->phy);
474 phy_power_on(musb->phy);
475
476 omap2430_low_level_init(musb);
477 musb_writel(musb->mregs, OTG_INTERFSEL,
478 musb->context.otg_interfsel);
479
480 /* Wait for musb to get oriented. Otherwise we can get babble */
481 usleep_range(200000, 250000);
482
483 return 0;
484}
485
486static const struct dev_pm_ops omap2430_pm_ops = {
487 .runtime_suspend = omap2430_runtime_suspend,
488 .runtime_resume = omap2430_runtime_resume,
489};
490
491#define DEV_PM_OPS (&omap2430_pm_ops)
492#else
493#define DEV_PM_OPS NULL
494#endif
495
496#ifdef CONFIG_OF
497static const struct of_device_id omap2430_id_table[] = {
498 {
499 .compatible = "ti,omap4-musb"
500 },
501 {
502 .compatible = "ti,omap3-musb"
503 },
504 {},
505};
506MODULE_DEVICE_TABLE(of, omap2430_id_table);
507#endif
508
509static struct platform_driver omap2430_driver = {
510 .probe = omap2430_probe,
511 .remove = omap2430_remove,
512 .driver = {
513 .name = "musb-omap2430",
514 .pm = DEV_PM_OPS,
515 .of_match_table = of_match_ptr(omap2430_id_table),
516 },
517};
518
519module_platform_driver(omap2430_driver);
520
521MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
522MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
523MODULE_LICENSE("GPL v2");