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18#ifndef __UBOOT__
19#include <linux/init.h>
20#include <linux/io.h>
21#include <linux/err.h>
22#include <linux/platform_device.h>
23#include <linux/dma-mapping.h>
24#include <linux/pm_runtime.h>
25#include <linux/module.h>
26
27#include <linux/of.h>
28#include <linux/of_device.h>
29#include <linux/of_address.h>
30
31#include <plat/usb.h>
32#else
33#include <common.h>
34#include <asm/omap_musb.h>
35#include "linux-compat.h"
36#endif
37
38#include "musb_core.h"
39
40
41
42
43
44static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
45 { return __raw_readb(addr + offset); }
46
47static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
48 { return __raw_readl(addr + offset); }
49
50static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
51 { __raw_writeb(data, addr + offset); }
52
53static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
54 { __raw_writel(data, addr + offset); }
55
56
57
58
59
60
61struct dsps_musb_wrapper {
62 u16 revision;
63 u16 control;
64 u16 status;
65 u16 eoi;
66 u16 epintr_set;
67 u16 epintr_clear;
68 u16 epintr_status;
69 u16 coreintr_set;
70 u16 coreintr_clear;
71 u16 coreintr_status;
72 u16 phy_utmi;
73 u16 mode;
74
75
76 unsigned reset:5;
77
78
79 unsigned usb_shift:5;
80 u32 usb_mask;
81 u32 usb_bitmap;
82 unsigned drvvbus:5;
83
84 unsigned txep_shift:5;
85 u32 txep_mask;
86 u32 txep_bitmap;
87
88 unsigned rxep_shift:5;
89 u32 rxep_mask;
90 u32 rxep_bitmap;
91
92
93 unsigned otg_disable:5;
94
95
96 unsigned iddig:5;
97
98 u32 musb_core_offset;
99 u8 poll_seconds;
100};
101
102static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = {
103 .revision = 0x00,
104 .control = 0x14,
105 .status = 0x18,
106 .eoi = 0x24,
107 .epintr_set = 0x38,
108 .epintr_clear = 0x40,
109 .epintr_status = 0x30,
110 .coreintr_set = 0x3c,
111 .coreintr_clear = 0x44,
112 .coreintr_status = 0x34,
113 .phy_utmi = 0xe0,
114 .mode = 0xe8,
115 .reset = 0,
116 .otg_disable = 21,
117 .iddig = 8,
118 .usb_shift = 0,
119 .usb_mask = 0x1ff,
120 .usb_bitmap = (0x1ff << 0),
121 .drvvbus = 8,
122 .txep_shift = 0,
123 .txep_mask = 0xffff,
124 .txep_bitmap = (0xffff << 0),
125 .rxep_shift = 16,
126 .rxep_mask = 0xfffe,
127 .rxep_bitmap = (0xfffe << 16),
128 .musb_core_offset = 0x400,
129 .poll_seconds = 2,
130};
131
132
133
134
135struct dsps_glue {
136 struct device *dev;
137 struct platform_device *musb;
138 const struct dsps_musb_wrapper *wrp;
139 struct timer_list timer;
140};
141
142
143
144
145#ifndef __UBOOT__
146static void dsps_musb_enable(struct musb *musb)
147#else
148static int dsps_musb_enable(struct musb *musb)
149#endif
150{
151#ifndef __UBOOT__
152 struct device *dev = musb->controller;
153 struct platform_device *pdev = to_platform_device(dev->parent);
154 struct dsps_glue *glue = platform_get_drvdata(pdev);
155 const struct dsps_musb_wrapper *wrp = glue->wrp;
156#else
157 const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
158#endif
159 void __iomem *reg_base = musb->ctrl_base;
160 u32 epmask, coremask;
161
162
163 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
164 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
165 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
166
167 dsps_writel(reg_base, wrp->epintr_set, epmask);
168 dsps_writel(reg_base, wrp->coreintr_set, coremask);
169
170#ifndef __UBOOT__
171 if (is_otg_enabled(musb))
172 dsps_writel(reg_base, wrp->coreintr_set,
173 (1 << wrp->drvvbus) << wrp->usb_shift);
174#else
175 return 0;
176#endif
177}
178
179
180
181
182static void dsps_musb_disable(struct musb *musb)
183{
184#ifndef __UBOOT__
185 struct device *dev = musb->controller;
186 struct platform_device *pdev = to_platform_device(dev->parent);
187 struct dsps_glue *glue = platform_get_drvdata(pdev);
188 const struct dsps_musb_wrapper *wrp = glue->wrp;
189 void __iomem *reg_base = musb->ctrl_base;
190
191 dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
192 dsps_writel(reg_base, wrp->epintr_clear,
193 wrp->txep_bitmap | wrp->rxep_bitmap);
194 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
195 dsps_writel(reg_base, wrp->eoi, 0);
196#endif
197}
198
199#ifndef __UBOOT__
200static void otg_timer(unsigned long _musb)
201{
202 struct musb *musb = (void *)_musb;
203 void __iomem *mregs = musb->mregs;
204 struct device *dev = musb->controller;
205 struct platform_device *pdev = to_platform_device(dev->parent);
206 struct dsps_glue *glue = platform_get_drvdata(pdev);
207 const struct dsps_musb_wrapper *wrp = glue->wrp;
208 u8 devctl;
209 unsigned long flags;
210
211
212
213
214
215 devctl = dsps_readb(mregs, MUSB_DEVCTL);
216 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
217 otg_state_string(musb->xceiv->state));
218
219 spin_lock_irqsave(&musb->lock, flags);
220 switch (musb->xceiv->state) {
221 case OTG_STATE_A_WAIT_BCON:
222 devctl &= ~MUSB_DEVCTL_SESSION;
223 dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);
224
225 devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
226 if (devctl & MUSB_DEVCTL_BDEVICE) {
227 musb->xceiv->state = OTG_STATE_B_IDLE;
228 MUSB_DEV_MODE(musb);
229 } else {
230 musb->xceiv->state = OTG_STATE_A_IDLE;
231 MUSB_HST_MODE(musb);
232 }
233 break;
234 case OTG_STATE_A_WAIT_VFALL:
235 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
236 dsps_writel(musb->ctrl_base, wrp->coreintr_set,
237 MUSB_INTR_VBUSERROR << wrp->usb_shift);
238 break;
239 case OTG_STATE_B_IDLE:
240 if (!is_peripheral_enabled(musb))
241 break;
242
243 devctl = dsps_readb(mregs, MUSB_DEVCTL);
244 if (devctl & MUSB_DEVCTL_BDEVICE)
245 mod_timer(&glue->timer,
246 jiffies + wrp->poll_seconds * HZ);
247 else
248 musb->xceiv->state = OTG_STATE_A_IDLE;
249 break;
250 default:
251 break;
252 }
253 spin_unlock_irqrestore(&musb->lock, flags);
254}
255
256static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
257{
258 struct device *dev = musb->controller;
259 struct platform_device *pdev = to_platform_device(dev->parent);
260 struct dsps_glue *glue = platform_get_drvdata(pdev);
261 static unsigned long last_timer;
262
263 if (!is_otg_enabled(musb))
264 return;
265
266 if (timeout == 0)
267 timeout = jiffies + msecs_to_jiffies(3);
268
269
270 if (musb->is_active || (musb->a_wait_bcon == 0 &&
271 musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
272 dev_dbg(musb->controller, "%s active, deleting timer\n",
273 otg_state_string(musb->xceiv->state));
274 del_timer(&glue->timer);
275 last_timer = jiffies;
276 return;
277 }
278
279 if (time_after(last_timer, timeout) && timer_pending(&glue->timer)) {
280 dev_dbg(musb->controller,
281 "Longer idle timer already pending, ignoring...\n");
282 return;
283 }
284 last_timer = timeout;
285
286 dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
287 otg_state_string(musb->xceiv->state),
288 jiffies_to_msecs(timeout - jiffies));
289 mod_timer(&glue->timer, timeout);
290}
291#endif
292
293static irqreturn_t dsps_interrupt(int irq, void *hci)
294{
295 struct musb *musb = hci;
296 void __iomem *reg_base = musb->ctrl_base;
297#ifndef __UBOOT__
298 struct device *dev = musb->controller;
299 struct platform_device *pdev = to_platform_device(dev->parent);
300 struct dsps_glue *glue = platform_get_drvdata(pdev);
301 const struct dsps_musb_wrapper *wrp = glue->wrp;
302#else
303 const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
304#endif
305 unsigned long flags;
306 irqreturn_t ret = IRQ_NONE;
307 u32 epintr, usbintr;
308
309 spin_lock_irqsave(&musb->lock, flags);
310
311
312 epintr = dsps_readl(reg_base, wrp->epintr_status);
313 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
314 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
315
316 if (epintr)
317 dsps_writel(reg_base, wrp->epintr_status, epintr);
318
319
320 usbintr = dsps_readl(reg_base, wrp->coreintr_status);
321 if (!usbintr && !epintr)
322 goto eoi;
323
324 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
325 if (usbintr)
326 dsps_writel(reg_base, wrp->coreintr_status, usbintr);
327
328 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
329 usbintr, epintr);
330#ifndef __UBOOT__
331
332
333
334
335
336
337
338
339 if ((usbintr & MUSB_INTR_BABBLE) && is_host_enabled(musb))
340 pr_info("CAUTION: musb: Babble Interrupt Occured\n");
341
342 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
343 int drvvbus = dsps_readl(reg_base, wrp->status);
344 void __iomem *mregs = musb->mregs;
345 u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
346 int err;
347
348 err = is_host_enabled(musb) && (musb->int_usb &
349 MUSB_INTR_VBUSERROR);
350 if (err) {
351
352
353
354
355
356
357
358
359
360
361
362 musb->int_usb &= ~MUSB_INTR_VBUSERROR;
363 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
364 mod_timer(&glue->timer,
365 jiffies + wrp->poll_seconds * HZ);
366 WARNING("VBUS error workaround (delay coming)\n");
367 } else if (is_host_enabled(musb) && drvvbus) {
368 musb->is_active = 1;
369 MUSB_HST_MODE(musb);
370 musb->xceiv->otg->default_a = 1;
371 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
372 del_timer(&glue->timer);
373 } else {
374 musb->is_active = 0;
375 MUSB_DEV_MODE(musb);
376 musb->xceiv->otg->default_a = 0;
377 musb->xceiv->state = OTG_STATE_B_IDLE;
378 }
379
380
381 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
382 drvvbus ? "on" : "off",
383 otg_state_string(musb->xceiv->state),
384 err ? " ERROR" : "",
385 devctl);
386 ret = IRQ_HANDLED;
387 }
388#endif
389
390 if (musb->int_tx || musb->int_rx || musb->int_usb)
391 ret |= musb_interrupt(musb);
392
393 eoi:
394
395 if (ret == IRQ_HANDLED || epintr || usbintr)
396 dsps_writel(reg_base, wrp->eoi, 1);
397
398#ifndef __UBOOT__
399
400 if (is_otg_enabled(musb) && musb->xceiv->state == OTG_STATE_B_IDLE)
401 mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ);
402#endif
403
404 spin_unlock_irqrestore(&musb->lock, flags);
405
406 return ret;
407}
408
409static int dsps_musb_init(struct musb *musb)
410{
411#ifndef __UBOOT__
412 struct device *dev = musb->controller;
413 struct musb_hdrc_platform_data *plat = dev->platform_data;
414 struct platform_device *pdev = to_platform_device(dev->parent);
415 struct dsps_glue *glue = platform_get_drvdata(pdev);
416 const struct dsps_musb_wrapper *wrp = glue->wrp;
417 struct omap_musb_board_data *data = plat->board_data;
418#else
419 struct omap_musb_board_data *data =
420 (struct omap_musb_board_data *)musb->controller;
421 const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
422#endif
423 void __iomem *reg_base = musb->ctrl_base;
424 u32 rev, val;
425 int status;
426
427
428 musb->mregs += wrp->musb_core_offset;
429
430#ifndef __UBOOT__
431
432 usb_nop_xceiv_register();
433 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
434 if (IS_ERR_OR_NULL(musb->xceiv))
435 return -ENODEV;
436#endif
437
438
439 rev = dsps_readl(reg_base, wrp->revision);
440 if (!rev) {
441 status = -ENODEV;
442 goto err0;
443 }
444
445#ifndef __UBOOT__
446 if (is_host_enabled(musb))
447 setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
448#endif
449
450
451 dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
452
453
454 if (data->set_phy_power)
455 data->set_phy_power(1);
456
457 musb->isr = dsps_interrupt;
458
459
460 val = dsps_readl(reg_base, wrp->phy_utmi);
461 val &= ~(1 << wrp->otg_disable);
462 dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
463
464
465 dsps_writel(reg_base, wrp->eoi, 0);
466
467 return 0;
468err0:
469#ifndef __UBOOT__
470 usb_put_phy(musb->xceiv);
471 usb_nop_xceiv_unregister();
472#endif
473 return status;
474}
475
476static int dsps_musb_exit(struct musb *musb)
477{
478#ifndef __UBOOT__
479 struct device *dev = musb->controller;
480 struct musb_hdrc_platform_data *plat = dev->platform_data;
481 struct omap_musb_board_data *data = plat->board_data;
482 struct platform_device *pdev = to_platform_device(dev->parent);
483 struct dsps_glue *glue = platform_get_drvdata(pdev);
484#else
485 struct omap_musb_board_data *data =
486 (struct omap_musb_board_data *)musb->controller;
487#endif
488
489#ifndef __UBOOT__
490 if (is_host_enabled(musb))
491 del_timer_sync(&glue->timer);
492#endif
493
494
495 if (data->set_phy_power)
496 data->set_phy_power(0);
497
498#ifndef __UBOOT__
499
500 usb_put_phy(musb->xceiv);
501 usb_nop_xceiv_unregister();
502#endif
503
504 return 0;
505}
506
507#ifndef __UBOOT__
508static struct musb_platform_ops dsps_ops = {
509#else
510struct musb_platform_ops musb_dsps_ops = {
511#endif
512 .init = dsps_musb_init,
513 .exit = dsps_musb_exit,
514
515 .enable = dsps_musb_enable,
516 .disable = dsps_musb_disable,
517
518#ifndef __UBOOT__
519 .try_idle = dsps_musb_try_idle,
520#endif
521};
522
523#ifndef __UBOOT__
524static u64 musb_dmamask = DMA_BIT_MASK(32);
525#endif
526
527#ifndef __UBOOT__
528static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
529{
530 struct device *dev = glue->dev;
531 struct platform_device *pdev = to_platform_device(dev);
532 struct musb_hdrc_platform_data *pdata = dev->platform_data;
533 struct platform_device *musb;
534 struct resource *res;
535 struct resource resources[2];
536 char res_name[10];
537 int ret;
538
539
540 sprintf(res_name, "musb%d", id);
541 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name);
542 if (!res) {
543 dev_err(dev, "%s get mem resource failed\n", res_name);
544 ret = -ENODEV;
545 goto err0;
546 }
547 res->parent = NULL;
548 resources[0] = *res;
549
550
551 sprintf(res_name, "musb%d-irq", id);
552 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name);
553 if (!res) {
554 dev_err(dev, "%s get irq resource failed\n", res_name);
555 ret = -ENODEV;
556 goto err0;
557 }
558 res->parent = NULL;
559 resources[1] = *res;
560 resources[1].name = "mc";
561
562
563 musb = platform_device_alloc("musb-hdrc", -1);
564 if (!musb) {
565 dev_err(dev, "failed to allocate musb device\n");
566 ret = -ENOMEM;
567 goto err0;
568 }
569
570 musb->dev.parent = dev;
571 musb->dev.dma_mask = &musb_dmamask;
572 musb->dev.coherent_dma_mask = musb_dmamask;
573
574 glue->musb = musb;
575
576 pdata->platform_ops = &dsps_ops;
577
578 ret = platform_device_add_resources(musb, resources, 2);
579 if (ret) {
580 dev_err(dev, "failed to add resources\n");
581 goto err1;
582 }
583
584 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
585 if (ret) {
586 dev_err(dev, "failed to add platform_data\n");
587 goto err1;
588 }
589
590 ret = platform_device_add(musb);
591 if (ret) {
592 dev_err(dev, "failed to register musb device\n");
593 goto err1;
594 }
595
596 return 0;
597
598err1:
599 platform_device_put(musb);
600err0:
601 return ret;
602}
603
604static void __devexit dsps_delete_musb_pdev(struct dsps_glue *glue)
605{
606 platform_device_del(glue->musb);
607 platform_device_put(glue->musb);
608}
609
610static int __devinit dsps_probe(struct platform_device *pdev)
611{
612 const struct platform_device_id *id = platform_get_device_id(pdev);
613 const struct dsps_musb_wrapper *wrp =
614 (struct dsps_musb_wrapper *)id->driver_data;
615 struct dsps_glue *glue;
616 struct resource *iomem;
617 int ret;
618
619
620 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
621 if (!glue) {
622 dev_err(&pdev->dev, "unable to allocate glue memory\n");
623 ret = -ENOMEM;
624 goto err0;
625 }
626
627
628 iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
629 if (!iomem) {
630 dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
631 ret = -ENODEV;
632 goto err1;
633 }
634
635 glue->dev = &pdev->dev;
636
637 glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
638 if (!glue->wrp) {
639 dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
640 ret = -ENOMEM;
641 goto err1;
642 }
643 platform_set_drvdata(pdev, glue);
644
645
646 pm_runtime_enable(&pdev->dev);
647
648 ret = pm_runtime_get_sync(&pdev->dev);
649 if (ret < 0) {
650 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
651 goto err2;
652 }
653
654
655 ret = dsps_create_musb_pdev(glue, 0);
656 if (ret != 0) {
657 dev_err(&pdev->dev, "failed to create child pdev\n");
658 goto err3;
659 }
660
661 return 0;
662
663err3:
664 pm_runtime_put(&pdev->dev);
665err2:
666 pm_runtime_disable(&pdev->dev);
667 kfree(glue->wrp);
668err1:
669 kfree(glue);
670err0:
671 return ret;
672}
673static int __devexit dsps_remove(struct platform_device *pdev)
674{
675 struct dsps_glue *glue = platform_get_drvdata(pdev);
676
677
678 dsps_delete_musb_pdev(glue);
679
680
681 pm_runtime_put(&pdev->dev);
682 pm_runtime_disable(&pdev->dev);
683 kfree(glue->wrp);
684 kfree(glue);
685 return 0;
686}
687
688#ifdef CONFIG_PM_SLEEP
689static int dsps_suspend(struct device *dev)
690{
691 struct musb_hdrc_platform_data *plat = dev->platform_data;
692 struct omap_musb_board_data *data = plat->board_data;
693
694
695 if (data->set_phy_power)
696 data->set_phy_power(0);
697
698 return 0;
699}
700
701static int dsps_resume(struct device *dev)
702{
703 struct musb_hdrc_platform_data *plat = dev->platform_data;
704 struct omap_musb_board_data *data = plat->board_data;
705
706
707 if (data->set_phy_power)
708 data->set_phy_power(1);
709
710 return 0;
711}
712#endif
713
714static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
715#endif
716
717#ifndef __UBOOT__
718static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
719 {
720 .name = "musb-ti81xx",
721 .driver_data = (kernel_ulong_t) &ti81xx_driver_data,
722 },
723 { },
724};
725MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
726
727static const struct of_device_id musb_dsps_of_match[] __devinitconst = {
728 { .compatible = "musb-ti81xx", },
729 { .compatible = "ti,ti81xx-musb", },
730 { .compatible = "ti,am335x-musb", },
731 { },
732};
733MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
734
735static struct platform_driver dsps_usbss_driver = {
736 .probe = dsps_probe,
737 .remove = __devexit_p(dsps_remove),
738 .driver = {
739 .name = "musb-dsps",
740 .pm = &dsps_pm_ops,
741 .of_match_table = musb_dsps_of_match,
742 },
743 .id_table = musb_dsps_id_table,
744};
745
746MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
747MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
748MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
749MODULE_LICENSE("GPL v2");
750
751static int __init dsps_init(void)
752{
753 return platform_driver_register(&dsps_usbss_driver);
754}
755subsys_initcall(dsps_init);
756
757static void __exit dsps_exit(void)
758{
759 platform_driver_unregister(&dsps_usbss_driver);
760}
761module_exit(dsps_exit);
762#endif
763