Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/usb/musb/omap2430.c

  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-omap.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 
 46 struct omap2430_glue {
 47         struct device           *dev;
 48         struct platform_device  *musb;
 49         enum omap_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 
 55 static struct omap2430_glue     *_glue;
 56 
 57 static struct timer_list musb_idle_timer;
 58 
 59 static 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->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->state = OTG_STATE_B_IDLE;
 74                         MUSB_DEV_MODE(musb);
 75                 } else {
 76                         musb->xceiv->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->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->state = OTG_STATE_B_IDLE;
100                 else
101                         musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
102         default:
103                 break;
104         }
105         spin_unlock_irqrestore(&musb->lock, flags);
106 }
107 
108 
109 static 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->state == OTG_STATE_A_WAIT_BCON))) {
120                 dev_dbg(musb->controller, "%s active, deleting timer\n",
121                         usb_otg_state_string(musb->xceiv->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->state),
139                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
140         mod_timer(&musb_idle_timer, timeout);
141 }
142 
143 static 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->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) & 0x80) {
166 
167                                 mdelay(5);
168                                 cpu_relax();
169 
170                                 if (time_after(jiffies, timeout)
171                                     || loops-- <= 0) {
172                                         dev_err(musb->controller,
173                                         "configured as A device timeout");
174                                         break;
175                                 }
176                         }
177 
178                         otg_set_vbus(otg, 1);
179                 } else {
180                         musb->is_active = 1;
181                         otg->default_a = 1;
182                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
183                         devctl |= MUSB_DEVCTL_SESSION;
184                         MUSB_HST_MODE(musb);
185                 }
186         } else {
187                 musb->is_active = 0;
188 
189                 /* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
190                  * jumping right to B_IDLE...
191                  */
192 
193                 otg->default_a = 0;
194                 musb->xceiv->state = OTG_STATE_B_IDLE;
195                 devctl &= ~MUSB_DEVCTL_SESSION;
196 
197                 MUSB_DEV_MODE(musb);
198         }
199         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
200 
201         dev_dbg(musb->controller, "VBUS %s, devctl %02x "
202                 /* otg %3x conf %08x prcm %08x */ "\n",
203                 usb_otg_state_string(musb->xceiv->state),
204                 musb_readb(musb->mregs, MUSB_DEVCTL));
205 }
206 
207 static int omap2430_musb_set_mode(struct musb *musb, u8 musb_mode)
208 {
209         u8      devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
210 
211         devctl |= MUSB_DEVCTL_SESSION;
212         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
213 
214         return 0;
215 }
216 
217 static inline void omap2430_low_level_exit(struct musb *musb)
218 {
219         u32 l;
220 
221         /* in any role */
222         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
223         l |= ENABLEFORCE;       /* enable MSTANDBY */
224         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
225 }
226 
227 static inline void omap2430_low_level_init(struct musb *musb)
228 {
229         u32 l;
230 
231         l = musb_readl(musb->mregs, OTG_FORCESTDBY);
232         l &= ~ENABLEFORCE;      /* disable MSTANDBY */
233         musb_writel(musb->mregs, OTG_FORCESTDBY, l);
234 }
235 
236 void omap_musb_mailbox(enum omap_musb_vbus_id_status status)
237 {
238         struct omap2430_glue    *glue = _glue;
239 
240         if (!glue) {
241                 pr_err("%s: musb core is not yet initialized\n", __func__);
242                 return;
243         }
244         glue->status = status;
245 
246         if (!glue_to_musb(glue)) {
247                 pr_err("%s: musb core is not yet ready\n", __func__);
248                 return;
249         }
250 
251         schedule_work(&glue->omap_musb_mailbox_work);
252 }
253 EXPORT_SYMBOL_GPL(omap_musb_mailbox);
254 
255 static 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 OMAP_MUSB_ID_GROUND:
265                 dev_dbg(dev, "ID GND\n");
266 
267                 otg->default_a = true;
268                 musb->xceiv->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 OMAP_MUSB_VBUS_VALID:
279                 dev_dbg(dev, "VBUS Connect\n");
280 
281                 otg->default_a = false;
282                 musb->xceiv->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 OMAP_MUSB_ID_FLOAT:
290         case OMAP_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 
315 static 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 
328 static 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 
348 static 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         status = pm_runtime_get_sync(dev);
394         if (status < 0) {
395                 dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
396                 goto err1;
397         }
398 
399         l = musb_readl(musb->mregs, OTG_INTERFSEL);
400 
401         if (data->interface_type == MUSB_INTERFACE_UTMI) {
402                 /* OMAP4 uses Internal PHY GS70 which uses UTMI interface */
403                 l &= ~ULPI_12PIN;       /* Disable ULPI */
404                 l |= UTMI_8BIT;         /* Enable UTMI  */
405         } else {
406                 l |= ULPI_12PIN;
407         }
408 
409         musb_writel(musb->mregs, OTG_INTERFSEL, l);
410 
411         pr_debug("HS USB OTG: revision 0x%x, sysconfig 0x%02x, "
412                         "sysstatus 0x%x, intrfsel 0x%x, simenable  0x%x\n",
413                         musb_readl(musb->mregs, OTG_REVISION),
414                         musb_readl(musb->mregs, OTG_SYSCONFIG),
415                         musb_readl(musb->mregs, OTG_SYSSTATUS),
416                         musb_readl(musb->mregs, OTG_INTERFSEL),
417                         musb_readl(musb->mregs, OTG_SIMENABLE));
418 
419         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
420 
421         if (glue->status != OMAP_MUSB_UNKNOWN)
422                 omap_musb_set_mailbox(glue);
423 
424         phy_init(musb->phy);
425         phy_power_on(musb->phy);
426 
427         pm_runtime_put_noidle(musb->controller);
428         return 0;
429 
430 err1:
431         return status;
432 }
433 
434 static void omap2430_musb_enable(struct musb *musb)
435 {
436         u8              devctl;
437         unsigned long timeout = jiffies + msecs_to_jiffies(1000);
438         struct device *dev = musb->controller;
439         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
440         struct musb_hdrc_platform_data *pdata = dev_get_platdata(dev);
441         struct omap_musb_board_data *data = pdata->board_data;
442 
443         switch (glue->status) {
444 
445         case OMAP_MUSB_ID_GROUND:
446                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
447                 if (data->interface_type != MUSB_INTERFACE_UTMI)
448                         break;
449                 devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
450                 /* start the session */
451                 devctl |= MUSB_DEVCTL_SESSION;
452                 musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
453                 while (musb_readb(musb->mregs, MUSB_DEVCTL) &
454                                 MUSB_DEVCTL_BDEVICE) {
455                         cpu_relax();
456 
457                         if (time_after(jiffies, timeout)) {
458                                 dev_err(dev, "configured as A device timeout");
459                                 break;
460                         }
461                 }
462                 break;
463 
464         case OMAP_MUSB_VBUS_VALID:
465                 omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
466                 break;
467 
468         default:
469                 break;
470         }
471 }
472 
473 static void omap2430_musb_disable(struct musb *musb)
474 {
475         struct device *dev = musb->controller;
476         struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
477 
478         if (glue->status != OMAP_MUSB_UNKNOWN)
479                 omap_control_usb_set_mode(glue->control_otghs,
480                         USB_MODE_DISCONNECT);
481 }
482 
483 static int omap2430_musb_exit(struct musb *musb)
484 {
485         del_timer_sync(&musb_idle_timer);
486 
487         omap2430_low_level_exit(musb);
488         phy_power_off(musb->phy);
489         phy_exit(musb->phy);
490 
491         return 0;
492 }
493 
494 static const struct musb_platform_ops omap2430_ops = {
495         .init           = omap2430_musb_init,
496         .exit           = omap2430_musb_exit,
497 
498         .set_mode       = omap2430_musb_set_mode,
499         .try_idle       = omap2430_musb_try_idle,
500 
501         .set_vbus       = omap2430_musb_set_vbus,
502 
503         .enable         = omap2430_musb_enable,
504         .disable        = omap2430_musb_disable,
505 };
506 
507 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
508 
509 static int omap2430_probe(struct platform_device *pdev)
510 {
511         struct resource                 musb_resources[3];
512         struct musb_hdrc_platform_data  *pdata = dev_get_platdata(&pdev->dev);
513         struct omap_musb_board_data     *data;
514         struct platform_device          *musb;
515         struct omap2430_glue            *glue;
516         struct device_node              *np = pdev->dev.of_node;
517         struct musb_hdrc_config         *config;
518         int                             ret = -ENOMEM;
519 
520         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
521         if (!glue) {
522                 dev_err(&pdev->dev, "failed to allocate glue context\n");
523                 goto err0;
524         }
525 
526         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
527         if (!musb) {
528                 dev_err(&pdev->dev, "failed to allocate musb device\n");
529                 goto err0;
530         }
531 
532         musb->dev.parent                = &pdev->dev;
533         musb->dev.dma_mask              = &omap2430_dmamask;
534         musb->dev.coherent_dma_mask     = omap2430_dmamask;
535 
536         glue->dev                       = &pdev->dev;
537         glue->musb                      = musb;
538         glue->status                    = OMAP_MUSB_UNKNOWN;
539         glue->control_otghs = ERR_PTR(-ENODEV);
540 
541         if (np) {
542                 struct device_node *control_node;
543                 struct platform_device *control_pdev;
544 
545                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
546                 if (!pdata) {
547                         dev_err(&pdev->dev,
548                                 "failed to allocate musb platform data\n");
549                         goto err2;
550                 }
551 
552                 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
553                 if (!data) {
554                         dev_err(&pdev->dev,
555                                 "failed to allocate musb board data\n");
556                         goto err2;
557                 }
558 
559                 config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
560                 if (!config) {
561                         dev_err(&pdev->dev,
562                                 "failed to allocate musb hdrc config\n");
563                         goto err2;
564                 }
565 
566                 of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
567                 of_property_read_u32(np, "interface-type",
568                                                 (u32 *)&data->interface_type);
569                 of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
570                 of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
571                 of_property_read_u32(np, "power", (u32 *)&pdata->power);
572                 config->multipoint = of_property_read_bool(np, "multipoint");
573 
574                 pdata->board_data       = data;
575                 pdata->config           = config;
576 
577                 control_node = of_parse_phandle(np, "ctrl-module", 0);
578                 if (control_node) {
579                         control_pdev = of_find_device_by_node(control_node);
580                         if (!control_pdev) {
581                                 dev_err(&pdev->dev, "Failed to get control device\n");
582                                 ret = -EINVAL;
583                                 goto err2;
584                         }
585                         glue->control_otghs = &control_pdev->dev;
586                 }
587         }
588         pdata->platform_ops             = &omap2430_ops;
589 
590         platform_set_drvdata(pdev, glue);
591 
592         /*
593          * REVISIT if we ever have two instances of the wrapper, we will be
594          * in big trouble
595          */
596         _glue   = glue;
597 
598         INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
599 
600         memset(musb_resources, 0x00, sizeof(*musb_resources) *
601                         ARRAY_SIZE(musb_resources));
602 
603         musb_resources[0].name = pdev->resource[0].name;
604         musb_resources[0].start = pdev->resource[0].start;
605         musb_resources[0].end = pdev->resource[0].end;
606         musb_resources[0].flags = pdev->resource[0].flags;
607 
608         musb_resources[1].name = pdev->resource[1].name;
609         musb_resources[1].start = pdev->resource[1].start;
610         musb_resources[1].end = pdev->resource[1].end;
611         musb_resources[1].flags = pdev->resource[1].flags;
612 
613         musb_resources[2].name = pdev->resource[2].name;
614         musb_resources[2].start = pdev->resource[2].start;
615         musb_resources[2].end = pdev->resource[2].end;
616         musb_resources[2].flags = pdev->resource[2].flags;
617 
618         ret = platform_device_add_resources(musb, musb_resources,
619                         ARRAY_SIZE(musb_resources));
620         if (ret) {
621                 dev_err(&pdev->dev, "failed to add resources\n");
622                 goto err2;
623         }
624 
625         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
626         if (ret) {
627                 dev_err(&pdev->dev, "failed to add platform_data\n");
628                 goto err2;
629         }
630 
631         pm_runtime_enable(&pdev->dev);
632 
633         ret = platform_device_add(musb);
634         if (ret) {
635                 dev_err(&pdev->dev, "failed to register musb device\n");
636                 goto err2;
637         }
638 
639         return 0;
640 
641 err2:
642         platform_device_put(musb);
643 
644 err0:
645         return ret;
646 }
647 
648 static int omap2430_remove(struct platform_device *pdev)
649 {
650         struct omap2430_glue            *glue = platform_get_drvdata(pdev);
651 
652         cancel_work_sync(&glue->omap_musb_mailbox_work);
653         platform_device_unregister(glue->musb);
654 
655         return 0;
656 }
657 
658 #ifdef CONFIG_PM
659 
660 static int omap2430_runtime_suspend(struct device *dev)
661 {
662         struct omap2430_glue            *glue = dev_get_drvdata(dev);
663         struct musb                     *musb = glue_to_musb(glue);
664 
665         if (musb) {
666                 musb->context.otg_interfsel = musb_readl(musb->mregs,
667                                 OTG_INTERFSEL);
668 
669                 omap2430_low_level_exit(musb);
670         }
671 
672         return 0;
673 }
674 
675 static int omap2430_runtime_resume(struct device *dev)
676 {
677         struct omap2430_glue            *glue = dev_get_drvdata(dev);
678         struct musb                     *musb = glue_to_musb(glue);
679 
680         if (musb) {
681                 omap2430_low_level_init(musb);
682                 musb_writel(musb->mregs, OTG_INTERFSEL,
683                                 musb->context.otg_interfsel);
684         }
685 
686         return 0;
687 }
688 
689 static struct dev_pm_ops omap2430_pm_ops = {
690         .runtime_suspend = omap2430_runtime_suspend,
691         .runtime_resume = omap2430_runtime_resume,
692 };
693 
694 #define DEV_PM_OPS      (&omap2430_pm_ops)
695 #else
696 #define DEV_PM_OPS      NULL
697 #endif
698 
699 #ifdef CONFIG_OF
700 static const struct of_device_id omap2430_id_table[] = {
701         {
702                 .compatible = "ti,omap4-musb"
703         },
704         {
705                 .compatible = "ti,omap3-musb"
706         },
707         {},
708 };
709 MODULE_DEVICE_TABLE(of, omap2430_id_table);
710 #endif
711 
712 static struct platform_driver omap2430_driver = {
713         .probe          = omap2430_probe,
714         .remove         = omap2430_remove,
715         .driver         = {
716                 .name   = "musb-omap2430",
717                 .pm     = DEV_PM_OPS,
718                 .of_match_table = of_match_ptr(omap2430_id_table),
719         },
720 };
721 
722 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
723 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
724 MODULE_LICENSE("GPL v2");
725 
726 static int __init omap2430_init(void)
727 {
728         return platform_driver_register(&omap2430_driver);
729 }
730 subsys_initcall(omap2430_init);
731 
732 static void __exit omap2430_exit(void)
733 {
734         platform_driver_unregister(&omap2430_driver);
735 }
736 module_exit(omap2430_exit);
737 

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