Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

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.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 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->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 
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->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 
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->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 
208 static 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 
218 static 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 
228 static 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 
237 static 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 
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 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 
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         /*
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 
442 err1:
443         return status;
444 }
445 
446 static 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 
485 static 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 
495 static 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 
506 static 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 
526 static u64 omap2430_dmamask = DMA_BIT_MASK(32);
527 
528 static 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 
656 err2:
657         platform_device_put(musb);
658 
659 err0:
660         return ret;
661 }
662 
663 static 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 
678 static 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 
693 static 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 
708 static 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
719 static const struct of_device_id omap2430_id_table[] = {
720         {
721                 .compatible = "ti,omap4-musb"
722         },
723         {
724                 .compatible = "ti,omap3-musb"
725         },
726         {},
727 };
728 MODULE_DEVICE_TABLE(of, omap2430_id_table);
729 #endif
730 
731 static 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 
741 MODULE_DESCRIPTION("OMAP2PLUS MUSB Glue Layer");
742 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
743 MODULE_LICENSE("GPL v2");
744 
745 static int __init omap2430_init(void)
746 {
747         return platform_driver_register(&omap2430_driver);
748 }
749 subsys_initcall(omap2430_init);
750 
751 static void __exit omap2430_exit(void)
752 {
753         platform_driver_unregister(&omap2430_driver);
754 }
755 module_exit(omap2430_exit);
756 

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