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18#include <linux/device.h>
19#include <linux/gpio.h>
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/ioport.h>
23#include <linux/types.h>
24#include <linux/errno.h>
25#include <linux/err.h>
26#include <linux/delay.h>
27#include <linux/slab.h>
28#include <linux/timer.h>
29#include <linux/list.h>
30#include <linux/interrupt.h>
31#include <linux/mm.h>
32#include <linux/platform_data/pxa2xx_udc.h>
33#include <linux/platform_device.h>
34#include <linux/dma-mapping.h>
35#include <linux/irq.h>
36#include <linux/clk.h>
37#include <linux/seq_file.h>
38#include <linux/debugfs.h>
39#include <linux/io.h>
40#include <linux/prefetch.h>
41
42#include <asm/byteorder.h>
43#include <asm/dma.h>
44#include <asm/mach-types.h>
45#include <asm/unaligned.h>
46
47#include <linux/usb/ch9.h>
48#include <linux/usb/gadget.h>
49#include <linux/usb/otg.h>
50
51
52
53
54#ifdef CONFIG_ARCH_PXA
55#include <mach/pxa25x-udc.h>
56#include <mach/hardware.h>
57#endif
58
59#ifdef CONFIG_ARCH_LUBBOCK
60#include <mach/lubbock.h>
61#endif
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87
88#define DRIVER_VERSION "30-June-2007"
89#define DRIVER_DESC "PXA 25x USB Device Controller driver"
90
91
92static const char driver_name [] = "pxa25x_udc";
93
94static const char ep0name [] = "ep0";
95
96
97#ifdef CONFIG_ARCH_IXP4XX
98
99
100#ifdef CONFIG_ARCH_PXA
101#error "Can't configure both IXP and PXA"
102#endif
103
104
105#define clk_get(dev,name) NULL
106#define clk_enable(clk) do { } while (0)
107#define clk_disable(clk) do { } while (0)
108#define clk_put(clk) do { } while (0)
109
110#endif
111
112#include "pxa25x_udc.h"
113
114
115#ifdef CONFIG_USB_PXA25X_SMALL
116#define SIZE_STR " (small)"
117#else
118#define SIZE_STR ""
119#endif
120
121
122
123
124
125
126
127static void pxa25x_ep_fifo_flush (struct usb_ep *ep);
128static void nuke (struct pxa25x_ep *, int status);
129
130
131static void pullup_off(void)
132{
133 struct pxa2xx_udc_mach_info *mach = the_controller->mach;
134 int off_level = mach->gpio_pullup_inverted;
135
136 if (gpio_is_valid(mach->gpio_pullup))
137 gpio_set_value(mach->gpio_pullup, off_level);
138 else if (mach->udc_command)
139 mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
140}
141
142static void pullup_on(void)
143{
144 struct pxa2xx_udc_mach_info *mach = the_controller->mach;
145 int on_level = !mach->gpio_pullup_inverted;
146
147 if (gpio_is_valid(mach->gpio_pullup))
148 gpio_set_value(mach->gpio_pullup, on_level);
149 else if (mach->udc_command)
150 mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
151}
152
153static void pio_irq_enable(int bEndpointAddress)
154{
155 bEndpointAddress &= 0xf;
156 if (bEndpointAddress < 8)
157 UICR0 &= ~(1 << bEndpointAddress);
158 else {
159 bEndpointAddress -= 8;
160 UICR1 &= ~(1 << bEndpointAddress);
161 }
162}
163
164static void pio_irq_disable(int bEndpointAddress)
165{
166 bEndpointAddress &= 0xf;
167 if (bEndpointAddress < 8)
168 UICR0 |= 1 << bEndpointAddress;
169 else {
170 bEndpointAddress -= 8;
171 UICR1 |= 1 << bEndpointAddress;
172 }
173}
174
175
176
177
178#define UDCCR_MASK_BITS (UDCCR_REM | UDCCR_SRM | UDCCR_UDE)
179
180static inline void udc_set_mask_UDCCR(int mask)
181{
182 UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS);
183}
184
185static inline void udc_clear_mask_UDCCR(int mask)
186{
187 UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS);
188}
189
190static inline void udc_ack_int_UDCCR(int mask)
191{
192
193 __u32 udccr = UDCCR & UDCCR_MASK_BITS;
194
195 UDCCR = udccr | (mask & ~UDCCR_MASK_BITS);
196}
197
198
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209
210
211
212static int pxa25x_ep_enable (struct usb_ep *_ep,
213 const struct usb_endpoint_descriptor *desc)
214{
215 struct pxa25x_ep *ep;
216 struct pxa25x_udc *dev;
217
218 ep = container_of (_ep, struct pxa25x_ep, ep);
219 if (!_ep || !desc || _ep->name == ep0name
220 || desc->bDescriptorType != USB_DT_ENDPOINT
221 || ep->bEndpointAddress != desc->bEndpointAddress
222 || ep->fifo_size < usb_endpoint_maxp (desc)) {
223 DMSG("%s, bad ep or descriptor\n", __func__);
224 return -EINVAL;
225 }
226
227
228 if (ep->bmAttributes != desc->bmAttributes
229 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
230 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
231 DMSG("%s, %s type mismatch\n", __func__, _ep->name);
232 return -EINVAL;
233 }
234
235
236 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
237 && usb_endpoint_maxp (desc)
238 != BULK_FIFO_SIZE)
239 || !desc->wMaxPacketSize) {
240 DMSG("%s, bad %s maxpacket\n", __func__, _ep->name);
241 return -ERANGE;
242 }
243
244 dev = ep->dev;
245 if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
246 DMSG("%s, bogus device state\n", __func__);
247 return -ESHUTDOWN;
248 }
249
250 ep->ep.desc = desc;
251 ep->stopped = 0;
252 ep->pio_irqs = 0;
253 ep->ep.maxpacket = usb_endpoint_maxp (desc);
254
255
256 pxa25x_ep_fifo_flush (_ep);
257
258
259
260 DBG(DBG_VERBOSE, "enabled %s\n", _ep->name);
261 return 0;
262}
263
264static int pxa25x_ep_disable (struct usb_ep *_ep)
265{
266 struct pxa25x_ep *ep;
267 unsigned long flags;
268
269 ep = container_of (_ep, struct pxa25x_ep, ep);
270 if (!_ep || !ep->ep.desc) {
271 DMSG("%s, %s not enabled\n", __func__,
272 _ep ? ep->ep.name : NULL);
273 return -EINVAL;
274 }
275 local_irq_save(flags);
276
277 nuke (ep, -ESHUTDOWN);
278
279
280 pxa25x_ep_fifo_flush (_ep);
281
282 ep->ep.desc = NULL;
283 ep->stopped = 1;
284
285 local_irq_restore(flags);
286 DBG(DBG_VERBOSE, "%s disabled\n", _ep->name);
287 return 0;
288}
289
290
291
292
293
294
295
296
297
298
299
300static struct usb_request *
301pxa25x_ep_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags)
302{
303 struct pxa25x_request *req;
304
305 req = kzalloc(sizeof(*req), gfp_flags);
306 if (!req)
307 return NULL;
308
309 INIT_LIST_HEAD (&req->queue);
310 return &req->req;
311}
312
313
314
315
316
317static void
318pxa25x_ep_free_request (struct usb_ep *_ep, struct usb_request *_req)
319{
320 struct pxa25x_request *req;
321
322 req = container_of (_req, struct pxa25x_request, req);
323 WARN_ON(!list_empty (&req->queue));
324 kfree(req);
325}
326
327
328
329
330
331
332static void done(struct pxa25x_ep *ep, struct pxa25x_request *req, int status)
333{
334 unsigned stopped = ep->stopped;
335
336 list_del_init(&req->queue);
337
338 if (likely (req->req.status == -EINPROGRESS))
339 req->req.status = status;
340 else
341 status = req->req.status;
342
343 if (status && status != -ESHUTDOWN)
344 DBG(DBG_VERBOSE, "complete %s req %p stat %d len %u/%u\n",
345 ep->ep.name, &req->req, status,
346 req->req.actual, req->req.length);
347
348
349 ep->stopped = 1;
350 usb_gadget_giveback_request(&ep->ep, &req->req);
351 ep->stopped = stopped;
352}
353
354
355static inline void ep0_idle (struct pxa25x_udc *dev)
356{
357 dev->ep0state = EP0_IDLE;
358}
359
360static int
361write_packet(volatile u32 *uddr, struct pxa25x_request *req, unsigned max)
362{
363 u8 *buf;
364 unsigned length, count;
365
366 buf = req->req.buf + req->req.actual;
367 prefetch(buf);
368
369
370 length = min(req->req.length - req->req.actual, max);
371 req->req.actual += length;
372
373 count = length;
374 while (likely(count--))
375 *uddr = *buf++;
376
377 return length;
378}
379
380
381
382
383
384
385static int
386write_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
387{
388 unsigned max;
389
390 max = usb_endpoint_maxp(ep->ep.desc);
391 do {
392 unsigned count;
393 int is_last, is_short;
394
395 count = write_packet(ep->reg_uddr, req, max);
396
397
398 if (unlikely (count != max))
399 is_last = is_short = 1;
400 else {
401 if (likely(req->req.length != req->req.actual)
402 || req->req.zero)
403 is_last = 0;
404 else
405 is_last = 1;
406
407 is_short = unlikely (max < ep->fifo_size);
408 }
409
410 DBG(DBG_VERY_NOISY, "wrote %s %d bytes%s%s %d left %p\n",
411 ep->ep.name, count,
412 is_last ? "/L" : "", is_short ? "/S" : "",
413 req->req.length - req->req.actual, req);
414
415
416
417
418
419 *ep->reg_udccs = UDCCS_BI_TPC;
420 if (is_short)
421 *ep->reg_udccs = UDCCS_BI_TSP;
422
423
424 if (is_last) {
425 done (ep, req, 0);
426 if (list_empty(&ep->queue))
427 pio_irq_disable (ep->bEndpointAddress);
428 return 1;
429 }
430
431
432
433
434
435 } while (*ep->reg_udccs & UDCCS_BI_TFS);
436 return 0;
437}
438
439
440
441
442static inline
443void ep0start(struct pxa25x_udc *dev, u32 flags, const char *tag)
444{
445 UDCCS0 = flags|UDCCS0_SA|UDCCS0_OPR;
446 USIR0 = USIR0_IR0;
447 dev->req_pending = 0;
448 DBG(DBG_VERY_NOISY, "%s %s, %02x/%02x\n",
449 __func__, tag, UDCCS0, flags);
450}
451
452static int
453write_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
454{
455 unsigned count;
456 int is_short;
457
458 count = write_packet(&UDDR0, req, EP0_FIFO_SIZE);
459 ep->dev->stats.write.bytes += count;
460
461
462 is_short = (count != EP0_FIFO_SIZE);
463
464 DBG(DBG_VERY_NOISY, "ep0in %d bytes %d left %p\n", count,
465 req->req.length - req->req.actual, req);
466
467 if (unlikely (is_short)) {
468 if (ep->dev->req_pending)
469 ep0start(ep->dev, UDCCS0_IPR, "short IN");
470 else
471 UDCCS0 = UDCCS0_IPR;
472
473 count = req->req.length;
474 done (ep, req, 0);
475 ep0_idle(ep->dev);
476#ifndef CONFIG_ARCH_IXP4XX
477#if 1
478
479
480
481
482
483
484 if (count >= EP0_FIFO_SIZE) {
485 count = 100;
486 do {
487 if ((UDCCS0 & UDCCS0_OPR) != 0) {
488
489 UDCCS0 = UDCCS0_OPR;
490 break;
491 }
492 count--;
493 udelay(1);
494 } while (count);
495 }
496#endif
497#endif
498 } else if (ep->dev->req_pending)
499 ep0start(ep->dev, 0, "IN");
500 return is_short;
501}
502
503
504
505
506
507
508
509
510
511
512static int
513read_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
514{
515 for (;;) {
516 u32 udccs;
517 u8 *buf;
518 unsigned bufferspace, count, is_short;
519
520
521
522
523
524 udccs = *ep->reg_udccs;
525 if (unlikely ((udccs & UDCCS_BO_RPC) == 0))
526 break;
527 buf = req->req.buf + req->req.actual;
528 prefetchw(buf);
529 bufferspace = req->req.length - req->req.actual;
530
531
532 if (likely (udccs & UDCCS_BO_RNE)) {
533 count = 1 + (0x0ff & *ep->reg_ubcr);
534 req->req.actual += min (count, bufferspace);
535 } else
536 count = 0;
537 is_short = (count < ep->ep.maxpacket);
538 DBG(DBG_VERY_NOISY, "read %s %02x, %d bytes%s req %p %d/%d\n",
539 ep->ep.name, udccs, count,
540 is_short ? "/S" : "",
541 req, req->req.actual, req->req.length);
542 while (likely (count-- != 0)) {
543 u8 byte = (u8) *ep->reg_uddr;
544
545 if (unlikely (bufferspace == 0)) {
546
547
548
549
550 if (req->req.status != -EOVERFLOW)
551 DMSG("%s overflow %d\n",
552 ep->ep.name, count);
553 req->req.status = -EOVERFLOW;
554 } else {
555 *buf++ = byte;
556 bufferspace--;
557 }
558 }
559 *ep->reg_udccs = UDCCS_BO_RPC;
560
561
562
563 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
564 if (udccs & UDCCS_IO_ROF)
565 req->req.status = -EHOSTUNREACH;
566
567 is_short = 1;
568 }
569
570
571 if (is_short || req->req.actual == req->req.length) {
572 done (ep, req, 0);
573 if (list_empty(&ep->queue))
574 pio_irq_disable (ep->bEndpointAddress);
575 return 1;
576 }
577
578
579 }
580 return 0;
581}
582
583
584
585
586
587
588
589static int
590read_ep0_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
591{
592 u8 *buf, byte;
593 unsigned bufferspace;
594
595 buf = req->req.buf + req->req.actual;
596 bufferspace = req->req.length - req->req.actual;
597
598 while (UDCCS0 & UDCCS0_RNE) {
599 byte = (u8) UDDR0;
600
601 if (unlikely (bufferspace == 0)) {
602
603
604
605
606 if (req->req.status != -EOVERFLOW)
607 DMSG("%s overflow\n", ep->ep.name);
608 req->req.status = -EOVERFLOW;
609 } else {
610 *buf++ = byte;
611 req->req.actual++;
612 bufferspace--;
613 }
614 }
615
616 UDCCS0 = UDCCS0_OPR | UDCCS0_IPR;
617
618
619 if (req->req.actual >= req->req.length)
620 return 1;
621
622
623 return 0;
624}
625
626
627
628static int
629pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
630{
631 struct pxa25x_request *req;
632 struct pxa25x_ep *ep;
633 struct pxa25x_udc *dev;
634 unsigned long flags;
635
636 req = container_of(_req, struct pxa25x_request, req);
637 if (unlikely (!_req || !_req->complete || !_req->buf
638 || !list_empty(&req->queue))) {
639 DMSG("%s, bad params\n", __func__);
640 return -EINVAL;
641 }
642
643 ep = container_of(_ep, struct pxa25x_ep, ep);
644 if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
645 DMSG("%s, bad ep\n", __func__);
646 return -EINVAL;
647 }
648
649 dev = ep->dev;
650 if (unlikely (!dev->driver
651 || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
652 DMSG("%s, bogus device state\n", __func__);
653 return -ESHUTDOWN;
654 }
655
656
657
658
659 if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
660 && req->req.length > usb_endpoint_maxp(ep->ep.desc)))
661 return -EMSGSIZE;
662
663 DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
664 _ep->name, _req, _req->length, _req->buf);
665
666 local_irq_save(flags);
667
668 _req->status = -EINPROGRESS;
669 _req->actual = 0;
670
671
672 if (list_empty(&ep->queue) && !ep->stopped) {
673 if (ep->ep.desc == NULL) {
674 unsigned length = _req->length;
675
676 switch (dev->ep0state) {
677 case EP0_IN_DATA_PHASE:
678 dev->stats.write.ops++;
679 if (write_ep0_fifo(ep, req))
680 req = NULL;
681 break;
682
683 case EP0_OUT_DATA_PHASE:
684 dev->stats.read.ops++;
685
686 if (dev->req_config) {
687 DBG(DBG_VERBOSE, "ep0 config ack%s\n",
688 dev->has_cfr ? "" : " raced");
689 if (dev->has_cfr)
690 UDCCFR = UDCCFR_AREN|UDCCFR_ACM
691 |UDCCFR_MB1;
692 done(ep, req, 0);
693 dev->ep0state = EP0_END_XFER;
694 local_irq_restore (flags);
695 return 0;
696 }
697 if (dev->req_pending)
698 ep0start(dev, UDCCS0_IPR, "OUT");
699 if (length == 0 || ((UDCCS0 & UDCCS0_RNE) != 0
700 && read_ep0_fifo(ep, req))) {
701 ep0_idle(dev);
702 done(ep, req, 0);
703 req = NULL;
704 }
705 break;
706
707 default:
708 DMSG("ep0 i/o, odd state %d\n", dev->ep0state);
709 local_irq_restore (flags);
710 return -EL2HLT;
711 }
712
713 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
714 if ((*ep->reg_udccs & UDCCS_BI_TFS) != 0
715 && write_fifo(ep, req))
716 req = NULL;
717 } else if ((*ep->reg_udccs & UDCCS_BO_RFS) != 0
718 && read_fifo(ep, req)) {
719 req = NULL;
720 }
721
722 if (likely(req && ep->ep.desc))
723 pio_irq_enable(ep->bEndpointAddress);
724 }
725
726
727 if (likely(req != NULL))
728 list_add_tail(&req->queue, &ep->queue);
729 local_irq_restore(flags);
730
731 return 0;
732}
733
734
735
736
737
738static void nuke(struct pxa25x_ep *ep, int status)
739{
740 struct pxa25x_request *req;
741
742
743 while (!list_empty(&ep->queue)) {
744 req = list_entry(ep->queue.next,
745 struct pxa25x_request,
746 queue);
747 done(ep, req, status);
748 }
749 if (ep->ep.desc)
750 pio_irq_disable (ep->bEndpointAddress);
751}
752
753
754
755static int pxa25x_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
756{
757 struct pxa25x_ep *ep;
758 struct pxa25x_request *req;
759 unsigned long flags;
760
761 ep = container_of(_ep, struct pxa25x_ep, ep);
762 if (!_ep || ep->ep.name == ep0name)
763 return -EINVAL;
764
765 local_irq_save(flags);
766
767
768 list_for_each_entry (req, &ep->queue, queue) {
769 if (&req->req == _req)
770 break;
771 }
772 if (&req->req != _req) {
773 local_irq_restore(flags);
774 return -EINVAL;
775 }
776
777 done(ep, req, -ECONNRESET);
778
779 local_irq_restore(flags);
780 return 0;
781}
782
783
784
785static int pxa25x_ep_set_halt(struct usb_ep *_ep, int value)
786{
787 struct pxa25x_ep *ep;
788 unsigned long flags;
789
790 ep = container_of(_ep, struct pxa25x_ep, ep);
791 if (unlikely (!_ep
792 || (!ep->ep.desc && ep->ep.name != ep0name))
793 || ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
794 DMSG("%s, bad ep\n", __func__);
795 return -EINVAL;
796 }
797 if (value == 0) {
798
799
800
801
802
803 DMSG("only host can clear %s halt\n", _ep->name);
804 return -EROFS;
805 }
806
807 local_irq_save(flags);
808
809 if ((ep->bEndpointAddress & USB_DIR_IN) != 0
810 && ((*ep->reg_udccs & UDCCS_BI_TFS) == 0
811 || !list_empty(&ep->queue))) {
812 local_irq_restore(flags);
813 return -EAGAIN;
814 }
815
816
817 *ep->reg_udccs = UDCCS_BI_FST|UDCCS_BI_FTF;
818
819
820 if (!ep->ep.desc) {
821 start_watchdog(ep->dev);
822 ep->dev->req_pending = 0;
823 ep->dev->ep0state = EP0_STALL;
824
825
826 } else {
827 unsigned i;
828 for (i = 0; i < 1000; i += 20) {
829 if (*ep->reg_udccs & UDCCS_BI_SST)
830 break;
831 udelay(20);
832 }
833 }
834 local_irq_restore(flags);
835
836 DBG(DBG_VERBOSE, "%s halt\n", _ep->name);
837 return 0;
838}
839
840static int pxa25x_ep_fifo_status(struct usb_ep *_ep)
841{
842 struct pxa25x_ep *ep;
843
844 ep = container_of(_ep, struct pxa25x_ep, ep);
845 if (!_ep) {
846 DMSG("%s, bad ep\n", __func__);
847 return -ENODEV;
848 }
849
850 if ((ep->bEndpointAddress & USB_DIR_IN) != 0)
851 return -EOPNOTSUPP;
852 if (ep->dev->gadget.speed == USB_SPEED_UNKNOWN
853 || (*ep->reg_udccs & UDCCS_BO_RFS) == 0)
854 return 0;
855 else
856 return (*ep->reg_ubcr & 0xfff) + 1;
857}
858
859static void pxa25x_ep_fifo_flush(struct usb_ep *_ep)
860{
861 struct pxa25x_ep *ep;
862
863 ep = container_of(_ep, struct pxa25x_ep, ep);
864 if (!_ep || ep->ep.name == ep0name || !list_empty(&ep->queue)) {
865 DMSG("%s, bad ep\n", __func__);
866 return;
867 }
868
869
870
871
872 if ((ep->bEndpointAddress & USB_DIR_IN) == 0) {
873 while (((*ep->reg_udccs) & UDCCS_BO_RNE) != 0)
874 (void) *ep->reg_uddr;
875 return;
876 }
877
878
879 *ep->reg_udccs = UDCCS_BI_TPC|UDCCS_BI_FTF|UDCCS_BI_TUR
880 | (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
881 ? 0 : UDCCS_BI_SST);
882}
883
884
885static struct usb_ep_ops pxa25x_ep_ops = {
886 .enable = pxa25x_ep_enable,
887 .disable = pxa25x_ep_disable,
888
889 .alloc_request = pxa25x_ep_alloc_request,
890 .free_request = pxa25x_ep_free_request,
891
892 .queue = pxa25x_ep_queue,
893 .dequeue = pxa25x_ep_dequeue,
894
895 .set_halt = pxa25x_ep_set_halt,
896 .fifo_status = pxa25x_ep_fifo_status,
897 .fifo_flush = pxa25x_ep_fifo_flush,
898};
899
900
901
902
903
904
905
906static int pxa25x_udc_get_frame(struct usb_gadget *_gadget)
907{
908 return ((UFNRH & 0x07) << 8) | (UFNRL & 0xff);
909}
910
911static int pxa25x_udc_wakeup(struct usb_gadget *_gadget)
912{
913
914 if ((UDCCS0 & UDCCS0_DRWF) == 0)
915 return -EHOSTUNREACH;
916 udc_set_mask_UDCCR(UDCCR_RSM);
917 return 0;
918}
919
920static void stop_activity(struct pxa25x_udc *, struct usb_gadget_driver *);
921static void udc_enable (struct pxa25x_udc *);
922static void udc_disable(struct pxa25x_udc *);
923
924
925
926
927static int pullup(struct pxa25x_udc *udc)
928{
929 int is_active = udc->vbus && udc->pullup && !udc->suspended;
930 DMSG("%s\n", is_active ? "active" : "inactive");
931 if (is_active) {
932 if (!udc->active) {
933 udc->active = 1;
934
935 clk_enable(udc->clk);
936 udc_enable(udc);
937 }
938 } else {
939 if (udc->active) {
940 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
941 DMSG("disconnect %s\n", udc->driver
942 ? udc->driver->driver.name
943 : "(no driver)");
944 stop_activity(udc, udc->driver);
945 }
946 udc_disable(udc);
947
948 clk_disable(udc->clk);
949 udc->active = 0;
950 }
951
952 }
953 return 0;
954}
955
956
957static int pxa25x_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
958{
959 struct pxa25x_udc *udc;
960
961 udc = container_of(_gadget, struct pxa25x_udc, gadget);
962 udc->vbus = is_active;
963 DMSG("vbus %s\n", is_active ? "supplied" : "inactive");
964 pullup(udc);
965 return 0;
966}
967
968
969static int pxa25x_udc_pullup(struct usb_gadget *_gadget, int is_active)
970{
971 struct pxa25x_udc *udc;
972
973 udc = container_of(_gadget, struct pxa25x_udc, gadget);
974
975
976 if (!gpio_is_valid(udc->mach->gpio_pullup) && !udc->mach->udc_command)
977 return -EOPNOTSUPP;
978
979 udc->pullup = (is_active != 0);
980 pullup(udc);
981 return 0;
982}
983
984
985
986
987
988static int pxa25x_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
989{
990 struct pxa25x_udc *udc;
991
992 udc = container_of(_gadget, struct pxa25x_udc, gadget);
993
994 if (!IS_ERR_OR_NULL(udc->transceiver))
995 return usb_phy_set_power(udc->transceiver, mA);
996 return -EOPNOTSUPP;
997}
998
999static int pxa25x_udc_start(struct usb_gadget *g,
1000 struct usb_gadget_driver *driver);
1001static int pxa25x_udc_stop(struct usb_gadget *g);
1002
1003static const struct usb_gadget_ops pxa25x_udc_ops = {
1004 .get_frame = pxa25x_udc_get_frame,
1005 .wakeup = pxa25x_udc_wakeup,
1006 .vbus_session = pxa25x_udc_vbus_session,
1007 .pullup = pxa25x_udc_pullup,
1008 .vbus_draw = pxa25x_udc_vbus_draw,
1009 .udc_start = pxa25x_udc_start,
1010 .udc_stop = pxa25x_udc_stop,
1011};
1012
1013
1014
1015#ifdef CONFIG_USB_GADGET_DEBUG_FS
1016
1017static int
1018udc_seq_show(struct seq_file *m, void *_d)
1019{
1020 struct pxa25x_udc *dev = m->private;
1021 unsigned long flags;
1022 int i;
1023 u32 tmp;
1024
1025 local_irq_save(flags);
1026
1027
1028 seq_printf(m, DRIVER_DESC "\n"
1029 "%s version: %s\nGadget driver: %s\nHost %s\n\n",
1030 driver_name, DRIVER_VERSION SIZE_STR "(pio)",
1031 dev->driver ? dev->driver->driver.name : "(none)",
1032 dev->gadget.speed == USB_SPEED_FULL ? "full speed" : "disconnected");
1033
1034
1035 seq_printf(m,
1036 "uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
1037 UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
1038
1039 tmp = UDCCR;
1040 seq_printf(m,
1041 "udccr %02X =%s%s%s%s%s%s%s%s\n", tmp,
1042 (tmp & UDCCR_REM) ? " rem" : "",
1043 (tmp & UDCCR_RSTIR) ? " rstir" : "",
1044 (tmp & UDCCR_SRM) ? " srm" : "",
1045 (tmp & UDCCR_SUSIR) ? " susir" : "",
1046 (tmp & UDCCR_RESIR) ? " resir" : "",
1047 (tmp & UDCCR_RSM) ? " rsm" : "",
1048 (tmp & UDCCR_UDA) ? " uda" : "",
1049 (tmp & UDCCR_UDE) ? " ude" : "");
1050
1051 tmp = UDCCS0;
1052 seq_printf(m,
1053 "udccs0 %02X =%s%s%s%s%s%s%s%s\n", tmp,
1054 (tmp & UDCCS0_SA) ? " sa" : "",
1055 (tmp & UDCCS0_RNE) ? " rne" : "",
1056 (tmp & UDCCS0_FST) ? " fst" : "",
1057 (tmp & UDCCS0_SST) ? " sst" : "",
1058 (tmp & UDCCS0_DRWF) ? " dwrf" : "",
1059 (tmp & UDCCS0_FTF) ? " ftf" : "",
1060 (tmp & UDCCS0_IPR) ? " ipr" : "",
1061 (tmp & UDCCS0_OPR) ? " opr" : "");
1062
1063 if (dev->has_cfr) {
1064 tmp = UDCCFR;
1065 seq_printf(m,
1066 "udccfr %02X =%s%s\n", tmp,
1067 (tmp & UDCCFR_AREN) ? " aren" : "",
1068 (tmp & UDCCFR_ACM) ? " acm" : "");
1069 }
1070
1071 if (dev->gadget.speed != USB_SPEED_FULL || !dev->driver)
1072 goto done;
1073
1074 seq_printf(m, "ep0 IN %lu/%lu, OUT %lu/%lu\nirqs %lu\n\n",
1075 dev->stats.write.bytes, dev->stats.write.ops,
1076 dev->stats.read.bytes, dev->stats.read.ops,
1077 dev->stats.irqs);
1078
1079
1080 for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
1081 struct pxa25x_ep *ep = &dev->ep [i];
1082 struct pxa25x_request *req;
1083
1084 if (i != 0) {
1085 const struct usb_endpoint_descriptor *desc;
1086
1087 desc = ep->ep.desc;
1088 if (!desc)
1089 continue;
1090 tmp = *dev->ep [i].reg_udccs;
1091 seq_printf(m,
1092 "%s max %d %s udccs %02x irqs %lu\n",
1093 ep->ep.name, usb_endpoint_maxp(desc),
1094 "pio", tmp, ep->pio_irqs);
1095
1096
1097 } else
1098 seq_printf(m, "ep0 max 16 pio irqs %lu\n",
1099 ep->pio_irqs);
1100
1101 if (list_empty(&ep->queue)) {
1102 seq_printf(m, "\t(nothing queued)\n");
1103 continue;
1104 }
1105 list_for_each_entry(req, &ep->queue, queue) {
1106 seq_printf(m,
1107 "\treq %p len %d/%d buf %p\n",
1108 &req->req, req->req.actual,
1109 req->req.length, req->req.buf);
1110 }
1111 }
1112
1113done:
1114 local_irq_restore(flags);
1115 return 0;
1116}
1117
1118static int
1119udc_debugfs_open(struct inode *inode, struct file *file)
1120{
1121 return single_open(file, udc_seq_show, inode->i_private);
1122}
1123
1124static const struct file_operations debug_fops = {
1125 .open = udc_debugfs_open,
1126 .read = seq_read,
1127 .llseek = seq_lseek,
1128 .release = single_release,
1129 .owner = THIS_MODULE,
1130};
1131
1132#define create_debug_files(dev) \
1133 do { \
1134 dev->debugfs_udc = debugfs_create_file(dev->gadget.name, \
1135 S_IRUGO, NULL, dev, &debug_fops); \
1136 } while (0)
1137#define remove_debug_files(dev) debugfs_remove(dev->debugfs_udc)
1138
1139#else
1140
1141#define create_debug_files(dev) do {} while (0)
1142#define remove_debug_files(dev) do {} while (0)
1143
1144#endif
1145
1146
1147
1148
1149
1150
1151static void udc_disable(struct pxa25x_udc *dev)
1152{
1153
1154 udc_set_mask_UDCCR(UDCCR_SRM|UDCCR_REM);
1155 UICR0 = UICR1 = 0xff;
1156 UFNRH = UFNRH_SIM;
1157
1158
1159 pullup_off();
1160
1161 udc_clear_mask_UDCCR(UDCCR_UDE);
1162
1163 ep0_idle (dev);
1164 dev->gadget.speed = USB_SPEED_UNKNOWN;
1165}
1166
1167
1168
1169
1170
1171static void udc_reinit(struct pxa25x_udc *dev)
1172{
1173 u32 i;
1174
1175
1176 INIT_LIST_HEAD (&dev->gadget.ep_list);
1177 INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1178 dev->ep0state = EP0_IDLE;
1179 dev->gadget.quirk_altset_not_supp = 1;
1180
1181
1182 for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
1183 struct pxa25x_ep *ep = &dev->ep[i];
1184
1185 if (i != 0)
1186 list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1187
1188 ep->ep.desc = NULL;
1189 ep->stopped = 0;
1190 INIT_LIST_HEAD (&ep->queue);
1191 ep->pio_irqs = 0;
1192 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1193 }
1194
1195
1196}
1197
1198
1199
1200
1201static void udc_enable (struct pxa25x_udc *dev)
1202{
1203 udc_clear_mask_UDCCR(UDCCR_UDE);
1204
1205
1206 udc_ack_int_UDCCR(UDCCR_SUSIR|UDCCR_RESIR);
1207
1208 ep0_idle(dev);
1209 dev->gadget.speed = USB_SPEED_UNKNOWN;
1210 dev->stats.irqs = 0;
1211
1212
1213
1214
1215
1216
1217
1218 udc_set_mask_UDCCR(UDCCR_UDE);
1219 if (!(UDCCR & UDCCR_UDA))
1220 udc_ack_int_UDCCR(UDCCR_RSTIR);
1221
1222 if (dev->has_cfr ) {
1223
1224
1225
1226 UDCCFR = UDCCFR_ACM | UDCCFR_MB1;
1227 } else {
1228
1229
1230
1231
1232
1233
1234 UDC_RES1 = 0x00;
1235 UDC_RES2 = 0x00;
1236 }
1237
1238
1239 udc_clear_mask_UDCCR(UDCCR_SRM | UDCCR_REM);
1240
1241
1242 UICR0 &= ~UICR0_IM0;
1243
1244
1245 pullup_on();
1246}
1247
1248
1249
1250
1251
1252
1253
1254
1255static int pxa25x_udc_start(struct usb_gadget *g,
1256 struct usb_gadget_driver *driver)
1257{
1258 struct pxa25x_udc *dev = to_pxa25x(g);
1259 int retval;
1260
1261
1262 dev->driver = driver;
1263 dev->pullup = 1;
1264
1265
1266
1267
1268
1269 if (!IS_ERR_OR_NULL(dev->transceiver)) {
1270 retval = otg_set_peripheral(dev->transceiver->otg,
1271 &dev->gadget);
1272 if (retval)
1273 goto bind_fail;
1274 }
1275
1276 dump_state(dev);
1277 return 0;
1278bind_fail:
1279 return retval;
1280}
1281
1282static void
1283reset_gadget(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
1284{
1285 int i;
1286
1287
1288 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1289 driver = NULL;
1290 dev->gadget.speed = USB_SPEED_UNKNOWN;
1291
1292
1293 for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
1294 struct pxa25x_ep *ep = &dev->ep[i];
1295
1296 ep->stopped = 1;
1297 nuke(ep, -ESHUTDOWN);
1298 }
1299 del_timer_sync(&dev->timer);
1300
1301
1302 if (driver)
1303 usb_gadget_udc_reset(&dev->gadget, driver);
1304
1305
1306 udc_reinit(dev);
1307}
1308
1309static void
1310stop_activity(struct pxa25x_udc *dev, struct usb_gadget_driver *driver)
1311{
1312 int i;
1313
1314
1315 if (dev->gadget.speed == USB_SPEED_UNKNOWN)
1316 driver = NULL;
1317 dev->gadget.speed = USB_SPEED_UNKNOWN;
1318
1319
1320 for (i = 0; i < PXA_UDC_NUM_ENDPOINTS; i++) {
1321 struct pxa25x_ep *ep = &dev->ep[i];
1322
1323 ep->stopped = 1;
1324 nuke(ep, -ESHUTDOWN);
1325 }
1326 del_timer_sync(&dev->timer);
1327
1328
1329 if (driver)
1330 driver->disconnect(&dev->gadget);
1331
1332
1333 udc_reinit(dev);
1334}
1335
1336static int pxa25x_udc_stop(struct usb_gadget*g)
1337{
1338 struct pxa25x_udc *dev = to_pxa25x(g);
1339
1340 local_irq_disable();
1341 dev->pullup = 0;
1342 stop_activity(dev, NULL);
1343 local_irq_enable();
1344
1345 if (!IS_ERR_OR_NULL(dev->transceiver))
1346 (void) otg_set_peripheral(dev->transceiver->otg, NULL);
1347
1348 dev->driver = NULL;
1349
1350 dump_state(dev);
1351
1352 return 0;
1353}
1354
1355
1356
1357#ifdef CONFIG_ARCH_LUBBOCK
1358
1359
1360
1361
1362
1363static irqreturn_t
1364lubbock_vbus_irq(int irq, void *_dev)
1365{
1366 struct pxa25x_udc *dev = _dev;
1367 int vbus;
1368
1369 dev->stats.irqs++;
1370 switch (irq) {
1371 case LUBBOCK_USB_IRQ:
1372 vbus = 1;
1373 disable_irq(LUBBOCK_USB_IRQ);
1374 enable_irq(LUBBOCK_USB_DISC_IRQ);
1375 break;
1376 case LUBBOCK_USB_DISC_IRQ:
1377 vbus = 0;
1378 disable_irq(LUBBOCK_USB_DISC_IRQ);
1379 enable_irq(LUBBOCK_USB_IRQ);
1380 break;
1381 default:
1382 return IRQ_NONE;
1383 }
1384
1385 pxa25x_udc_vbus_session(&dev->gadget, vbus);
1386 return IRQ_HANDLED;
1387}
1388
1389#endif
1390
1391
1392
1393
1394static inline void clear_ep_state (struct pxa25x_udc *dev)
1395{
1396 unsigned i;
1397
1398
1399
1400
1401 for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++)
1402 nuke(&dev->ep[i], -ECONNABORTED);
1403}
1404
1405static void udc_watchdog(unsigned long _dev)
1406{
1407 struct pxa25x_udc *dev = (void *)_dev;
1408
1409 local_irq_disable();
1410 if (dev->ep0state == EP0_STALL
1411 && (UDCCS0 & UDCCS0_FST) == 0
1412 && (UDCCS0 & UDCCS0_SST) == 0) {
1413 UDCCS0 = UDCCS0_FST|UDCCS0_FTF;
1414 DBG(DBG_VERBOSE, "ep0 re-stall\n");
1415 start_watchdog(dev);
1416 }
1417 local_irq_enable();
1418}
1419
1420static void handle_ep0 (struct pxa25x_udc *dev)
1421{
1422 u32 udccs0 = UDCCS0;
1423 struct pxa25x_ep *ep = &dev->ep [0];
1424 struct pxa25x_request *req;
1425 union {
1426 struct usb_ctrlrequest r;
1427 u8 raw [8];
1428 u32 word [2];
1429 } u;
1430
1431 if (list_empty(&ep->queue))
1432 req = NULL;
1433 else
1434 req = list_entry(ep->queue.next, struct pxa25x_request, queue);
1435
1436
1437 if (udccs0 & UDCCS0_SST) {
1438 nuke(ep, -EPIPE);
1439 UDCCS0 = UDCCS0_SST;
1440 del_timer(&dev->timer);
1441 ep0_idle(dev);
1442 }
1443
1444
1445 if ((udccs0 & UDCCS0_SA) != 0 && dev->ep0state != EP0_IDLE) {
1446 nuke(ep, 0);
1447 del_timer(&dev->timer);
1448 ep0_idle(dev);
1449 }
1450
1451 switch (dev->ep0state) {
1452 case EP0_IDLE:
1453
1454 udccs0 = UDCCS0;
1455
1456
1457 if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))
1458 == (UDCCS0_OPR|UDCCS0_SA|UDCCS0_RNE))) {
1459 int i;
1460
1461 nuke (ep, -EPROTO);
1462
1463
1464 for (i = 0; i < 8; i++) {
1465 if (unlikely(!(UDCCS0 & UDCCS0_RNE))) {
1466bad_setup:
1467 DMSG("SETUP %d!\n", i);
1468 goto stall;
1469 }
1470 u.raw [i] = (u8) UDDR0;
1471 }
1472 if (unlikely((UDCCS0 & UDCCS0_RNE) != 0))
1473 goto bad_setup;
1474
1475got_setup:
1476 DBG(DBG_VERBOSE, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1477 u.r.bRequestType, u.r.bRequest,
1478 le16_to_cpu(u.r.wValue),
1479 le16_to_cpu(u.r.wIndex),
1480 le16_to_cpu(u.r.wLength));
1481
1482
1483 dev->req_std = (u.r.bRequestType & USB_TYPE_MASK)
1484 == USB_TYPE_STANDARD;
1485 dev->req_config = 0;
1486 dev->req_pending = 1;
1487 switch (u.r.bRequest) {
1488
1489 case USB_REQ_SET_CONFIGURATION:
1490 if (u.r.bRequestType == USB_RECIP_DEVICE) {
1491
1492
1493
1494config_change:
1495 dev->req_config = 1;
1496 clear_ep_state(dev);
1497
1498
1499
1500
1501 }
1502 break;
1503
1504 case USB_REQ_SET_INTERFACE:
1505 if (u.r.bRequestType == USB_RECIP_INTERFACE) {
1506
1507
1508
1509
1510
1511 DMSG("broken set_interface (%d/%d)\n",
1512 le16_to_cpu(u.r.wIndex),
1513 le16_to_cpu(u.r.wValue));
1514 goto config_change;
1515 }
1516 break;
1517
1518 case USB_REQ_SET_ADDRESS:
1519 if (u.r.bRequestType == USB_RECIP_DEVICE) {
1520 ep0start(dev, 0, "address");
1521 return;
1522 }
1523 break;
1524 }
1525
1526 if (u.r.bRequestType & USB_DIR_IN)
1527 dev->ep0state = EP0_IN_DATA_PHASE;
1528 else
1529 dev->ep0state = EP0_OUT_DATA_PHASE;
1530
1531 i = dev->driver->setup(&dev->gadget, &u.r);
1532 if (i < 0) {
1533
1534 if (dev->req_config) {
1535
1536
1537
1538
1539 WARNING("config change %02x fail %d?\n",
1540 u.r.bRequest, i);
1541 return;
1542
1543
1544
1545
1546 }
1547 DBG(DBG_VERBOSE, "protocol STALL, "
1548 "%02x err %d\n", UDCCS0, i);
1549stall:
1550
1551
1552
1553
1554 ep0start(dev, UDCCS0_FST|UDCCS0_FTF, "stall");
1555 start_watchdog(dev);
1556 dev->ep0state = EP0_STALL;
1557
1558
1559 } else if (dev->req_pending) {
1560 if (likely(dev->ep0state == EP0_IN_DATA_PHASE
1561 || dev->req_std || u.r.wLength))
1562 ep0start(dev, 0, "defer");
1563 else
1564 ep0start(dev, UDCCS0_IPR, "defer/IPR");
1565 }
1566
1567
1568 return;
1569
1570 } else if (likely((udccs0 & (UDCCS0_OPR|UDCCS0_SA))
1571 == (UDCCS0_OPR|UDCCS0_SA))) {
1572 unsigned i;
1573
1574
1575
1576
1577 DBG(DBG_VERBOSE, "e131\n");
1578 nuke(ep, -EPROTO);
1579
1580
1581 for (i = 0; i < 8; i++)
1582 u.raw [i] = (u8) UDDR0;
1583 if ((u.r.bRequestType & USB_RECIP_MASK)
1584 > USB_RECIP_OTHER)
1585 goto stall;
1586 if (u.word [0] == 0 && u.word [1] == 0)
1587 goto stall;
1588 goto got_setup;
1589 } else {
1590
1591
1592
1593
1594
1595 UDCCS0 = udccs0 & (UDCCS0_SA|UDCCS0_OPR);
1596 }
1597 break;
1598 case EP0_IN_DATA_PHASE:
1599 if (udccs0 & UDCCS0_OPR) {
1600 UDCCS0 = UDCCS0_OPR|UDCCS0_FTF;
1601 DBG(DBG_VERBOSE, "ep0in premature status\n");
1602 if (req)
1603 done(ep, req, 0);
1604 ep0_idle(dev);
1605 } else {
1606 if (req) {
1607
1608 (void) write_ep0_fifo(ep, req);
1609 }
1610 }
1611 break;
1612 case EP0_OUT_DATA_PHASE:
1613 if (udccs0 & UDCCS0_OPR) {
1614 if (req) {
1615
1616 if (read_ep0_fifo(ep, req))
1617 done(ep, req, 0);
1618
1619 }
1620 } else {
1621 DBG(DBG_VERBOSE, "ep0out premature status\n");
1622 if (req)
1623 done(ep, req, 0);
1624 ep0_idle(dev);
1625 }
1626 break;
1627 case EP0_END_XFER:
1628 if (req)
1629 done(ep, req, 0);
1630
1631
1632
1633 if (udccs0 & UDCCS0_OPR)
1634 UDCCS0 = UDCCS0_OPR;
1635 ep0_idle(dev);
1636 break;
1637 case EP0_STALL:
1638 UDCCS0 = UDCCS0_FST;
1639 break;
1640 }
1641 USIR0 = USIR0_IR0;
1642}
1643
1644static void handle_ep(struct pxa25x_ep *ep)
1645{
1646 struct pxa25x_request *req;
1647 int is_in = ep->bEndpointAddress & USB_DIR_IN;
1648 int completed;
1649 u32 udccs, tmp;
1650
1651 do {
1652 completed = 0;
1653 if (likely (!list_empty(&ep->queue)))
1654 req = list_entry(ep->queue.next,
1655 struct pxa25x_request, queue);
1656 else
1657 req = NULL;
1658
1659
1660
1661 udccs = *ep->reg_udccs;
1662 if (unlikely(is_in)) {
1663 tmp = UDCCS_BI_TUR;
1664 if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
1665 tmp |= UDCCS_BI_SST;
1666 tmp &= udccs;
1667 if (likely (tmp))
1668 *ep->reg_udccs = tmp;
1669 if (req && likely ((udccs & UDCCS_BI_TFS) != 0))
1670 completed = write_fifo(ep, req);
1671
1672 } else {
1673 if (likely(ep->bmAttributes == USB_ENDPOINT_XFER_BULK))
1674 tmp = UDCCS_BO_SST | UDCCS_BO_DME;
1675 else
1676 tmp = UDCCS_IO_ROF | UDCCS_IO_DME;
1677 tmp &= udccs;
1678 if (likely(tmp))
1679 *ep->reg_udccs = tmp;
1680
1681
1682 if (likely(req)) {
1683 completed = read_fifo(ep, req);
1684 } else
1685 pio_irq_disable (ep->bEndpointAddress);
1686 }
1687 ep->pio_irqs++;
1688 } while (completed);
1689}
1690
1691
1692
1693
1694
1695
1696
1697
1698static irqreturn_t
1699pxa25x_udc_irq(int irq, void *_dev)
1700{
1701 struct pxa25x_udc *dev = _dev;
1702 int handled;
1703
1704 dev->stats.irqs++;
1705 do {
1706 u32 udccr = UDCCR;
1707
1708 handled = 0;
1709
1710
1711 if (unlikely(udccr & UDCCR_SUSIR)) {
1712 udc_ack_int_UDCCR(UDCCR_SUSIR);
1713 handled = 1;
1714 DBG(DBG_VERBOSE, "USB suspend\n");
1715
1716 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1717 && dev->driver
1718 && dev->driver->suspend)
1719 dev->driver->suspend(&dev->gadget);
1720 ep0_idle (dev);
1721 }
1722
1723
1724 if (unlikely(udccr & UDCCR_RESIR)) {
1725 udc_ack_int_UDCCR(UDCCR_RESIR);
1726 handled = 1;
1727 DBG(DBG_VERBOSE, "USB resume\n");
1728
1729 if (dev->gadget.speed != USB_SPEED_UNKNOWN
1730 && dev->driver
1731 && dev->driver->resume)
1732 dev->driver->resume(&dev->gadget);
1733 }
1734
1735
1736 if (unlikely(udccr & UDCCR_RSTIR)) {
1737 udc_ack_int_UDCCR(UDCCR_RSTIR);
1738 handled = 1;
1739
1740 if ((UDCCR & UDCCR_UDA) == 0) {
1741 DBG(DBG_VERBOSE, "USB reset start\n");
1742
1743
1744
1745
1746 reset_gadget(dev, dev->driver);
1747
1748 } else {
1749 DBG(DBG_VERBOSE, "USB reset end\n");
1750 dev->gadget.speed = USB_SPEED_FULL;
1751 memset(&dev->stats, 0, sizeof dev->stats);
1752
1753 }
1754
1755 } else {
1756 u32 usir0 = USIR0 & ~UICR0;
1757 u32 usir1 = USIR1 & ~UICR1;
1758 int i;
1759
1760 if (unlikely (!usir0 && !usir1))
1761 continue;
1762
1763 DBG(DBG_VERY_NOISY, "irq %02x.%02x\n", usir1, usir0);
1764
1765
1766 if (usir0 & USIR0_IR0) {
1767 dev->ep[0].pio_irqs++;
1768 handle_ep0(dev);
1769 handled = 1;
1770 }
1771
1772
1773 for (i = 0; i < 8; i++) {
1774 u32 tmp = 1 << i;
1775
1776 if (i && (usir0 & tmp)) {
1777 handle_ep(&dev->ep[i]);
1778 USIR0 |= tmp;
1779 handled = 1;
1780 }
1781#ifndef CONFIG_USB_PXA25X_SMALL
1782 if (usir1 & tmp) {
1783 handle_ep(&dev->ep[i+8]);
1784 USIR1 |= tmp;
1785 handled = 1;
1786 }
1787#endif
1788 }
1789 }
1790
1791
1792
1793 } while (handled);
1794 return IRQ_HANDLED;
1795}
1796
1797
1798
1799static void nop_release (struct device *dev)
1800{
1801 DMSG("%s %s\n", __func__, dev_name(dev));
1802}
1803
1804
1805
1806
1807
1808static struct pxa25x_udc memory = {
1809 .gadget = {
1810 .ops = &pxa25x_udc_ops,
1811 .ep0 = &memory.ep[0].ep,
1812 .name = driver_name,
1813 .dev = {
1814 .init_name = "gadget",
1815 .release = nop_release,
1816 },
1817 },
1818
1819
1820 .ep[0] = {
1821 .ep = {
1822 .name = ep0name,
1823 .ops = &pxa25x_ep_ops,
1824 .maxpacket = EP0_FIFO_SIZE,
1825 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1826 USB_EP_CAPS_DIR_ALL),
1827 },
1828 .dev = &memory,
1829 .reg_udccs = &UDCCS0,
1830 .reg_uddr = &UDDR0,
1831 },
1832
1833
1834 .ep[1] = {
1835 .ep = {
1836 .name = "ep1in-bulk",
1837 .ops = &pxa25x_ep_ops,
1838 .maxpacket = BULK_FIFO_SIZE,
1839 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1840 USB_EP_CAPS_DIR_IN),
1841 },
1842 .dev = &memory,
1843 .fifo_size = BULK_FIFO_SIZE,
1844 .bEndpointAddress = USB_DIR_IN | 1,
1845 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1846 .reg_udccs = &UDCCS1,
1847 .reg_uddr = &UDDR1,
1848 },
1849 .ep[2] = {
1850 .ep = {
1851 .name = "ep2out-bulk",
1852 .ops = &pxa25x_ep_ops,
1853 .maxpacket = BULK_FIFO_SIZE,
1854 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1855 USB_EP_CAPS_DIR_OUT),
1856 },
1857 .dev = &memory,
1858 .fifo_size = BULK_FIFO_SIZE,
1859 .bEndpointAddress = 2,
1860 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1861 .reg_udccs = &UDCCS2,
1862 .reg_ubcr = &UBCR2,
1863 .reg_uddr = &UDDR2,
1864 },
1865#ifndef CONFIG_USB_PXA25X_SMALL
1866 .ep[3] = {
1867 .ep = {
1868 .name = "ep3in-iso",
1869 .ops = &pxa25x_ep_ops,
1870 .maxpacket = ISO_FIFO_SIZE,
1871 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
1872 USB_EP_CAPS_DIR_IN),
1873 },
1874 .dev = &memory,
1875 .fifo_size = ISO_FIFO_SIZE,
1876 .bEndpointAddress = USB_DIR_IN | 3,
1877 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
1878 .reg_udccs = &UDCCS3,
1879 .reg_uddr = &UDDR3,
1880 },
1881 .ep[4] = {
1882 .ep = {
1883 .name = "ep4out-iso",
1884 .ops = &pxa25x_ep_ops,
1885 .maxpacket = ISO_FIFO_SIZE,
1886 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
1887 USB_EP_CAPS_DIR_OUT),
1888 },
1889 .dev = &memory,
1890 .fifo_size = ISO_FIFO_SIZE,
1891 .bEndpointAddress = 4,
1892 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
1893 .reg_udccs = &UDCCS4,
1894 .reg_ubcr = &UBCR4,
1895 .reg_uddr = &UDDR4,
1896 },
1897 .ep[5] = {
1898 .ep = {
1899 .name = "ep5in-int",
1900 .ops = &pxa25x_ep_ops,
1901 .maxpacket = INT_FIFO_SIZE,
1902 .caps = USB_EP_CAPS(0, 0),
1903 },
1904 .dev = &memory,
1905 .fifo_size = INT_FIFO_SIZE,
1906 .bEndpointAddress = USB_DIR_IN | 5,
1907 .bmAttributes = USB_ENDPOINT_XFER_INT,
1908 .reg_udccs = &UDCCS5,
1909 .reg_uddr = &UDDR5,
1910 },
1911
1912
1913 .ep[6] = {
1914 .ep = {
1915 .name = "ep6in-bulk",
1916 .ops = &pxa25x_ep_ops,
1917 .maxpacket = BULK_FIFO_SIZE,
1918 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1919 USB_EP_CAPS_DIR_IN),
1920 },
1921 .dev = &memory,
1922 .fifo_size = BULK_FIFO_SIZE,
1923 .bEndpointAddress = USB_DIR_IN | 6,
1924 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1925 .reg_udccs = &UDCCS6,
1926 .reg_uddr = &UDDR6,
1927 },
1928 .ep[7] = {
1929 .ep = {
1930 .name = "ep7out-bulk",
1931 .ops = &pxa25x_ep_ops,
1932 .maxpacket = BULK_FIFO_SIZE,
1933 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1934 USB_EP_CAPS_DIR_OUT),
1935 },
1936 .dev = &memory,
1937 .fifo_size = BULK_FIFO_SIZE,
1938 .bEndpointAddress = 7,
1939 .bmAttributes = USB_ENDPOINT_XFER_BULK,
1940 .reg_udccs = &UDCCS7,
1941 .reg_ubcr = &UBCR7,
1942 .reg_uddr = &UDDR7,
1943 },
1944 .ep[8] = {
1945 .ep = {
1946 .name = "ep8in-iso",
1947 .ops = &pxa25x_ep_ops,
1948 .maxpacket = ISO_FIFO_SIZE,
1949 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
1950 USB_EP_CAPS_DIR_IN),
1951 },
1952 .dev = &memory,
1953 .fifo_size = ISO_FIFO_SIZE,
1954 .bEndpointAddress = USB_DIR_IN | 8,
1955 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
1956 .reg_udccs = &UDCCS8,
1957 .reg_uddr = &UDDR8,
1958 },
1959 .ep[9] = {
1960 .ep = {
1961 .name = "ep9out-iso",
1962 .ops = &pxa25x_ep_ops,
1963 .maxpacket = ISO_FIFO_SIZE,
1964 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
1965 USB_EP_CAPS_DIR_OUT),
1966 },
1967 .dev = &memory,
1968 .fifo_size = ISO_FIFO_SIZE,
1969 .bEndpointAddress = 9,
1970 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
1971 .reg_udccs = &UDCCS9,
1972 .reg_ubcr = &UBCR9,
1973 .reg_uddr = &UDDR9,
1974 },
1975 .ep[10] = {
1976 .ep = {
1977 .name = "ep10in-int",
1978 .ops = &pxa25x_ep_ops,
1979 .maxpacket = INT_FIFO_SIZE,
1980 .caps = USB_EP_CAPS(0, 0),
1981 },
1982 .dev = &memory,
1983 .fifo_size = INT_FIFO_SIZE,
1984 .bEndpointAddress = USB_DIR_IN | 10,
1985 .bmAttributes = USB_ENDPOINT_XFER_INT,
1986 .reg_udccs = &UDCCS10,
1987 .reg_uddr = &UDDR10,
1988 },
1989
1990
1991 .ep[11] = {
1992 .ep = {
1993 .name = "ep11in-bulk",
1994 .ops = &pxa25x_ep_ops,
1995 .maxpacket = BULK_FIFO_SIZE,
1996 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1997 USB_EP_CAPS_DIR_IN),
1998 },
1999 .dev = &memory,
2000 .fifo_size = BULK_FIFO_SIZE,
2001 .bEndpointAddress = USB_DIR_IN | 11,
2002 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2003 .reg_udccs = &UDCCS11,
2004 .reg_uddr = &UDDR11,
2005 },
2006 .ep[12] = {
2007 .ep = {
2008 .name = "ep12out-bulk",
2009 .ops = &pxa25x_ep_ops,
2010 .maxpacket = BULK_FIFO_SIZE,
2011 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
2012 USB_EP_CAPS_DIR_OUT),
2013 },
2014 .dev = &memory,
2015 .fifo_size = BULK_FIFO_SIZE,
2016 .bEndpointAddress = 12,
2017 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2018 .reg_udccs = &UDCCS12,
2019 .reg_ubcr = &UBCR12,
2020 .reg_uddr = &UDDR12,
2021 },
2022 .ep[13] = {
2023 .ep = {
2024 .name = "ep13in-iso",
2025 .ops = &pxa25x_ep_ops,
2026 .maxpacket = ISO_FIFO_SIZE,
2027 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
2028 USB_EP_CAPS_DIR_IN),
2029 },
2030 .dev = &memory,
2031 .fifo_size = ISO_FIFO_SIZE,
2032 .bEndpointAddress = USB_DIR_IN | 13,
2033 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
2034 .reg_udccs = &UDCCS13,
2035 .reg_uddr = &UDDR13,
2036 },
2037 .ep[14] = {
2038 .ep = {
2039 .name = "ep14out-iso",
2040 .ops = &pxa25x_ep_ops,
2041 .maxpacket = ISO_FIFO_SIZE,
2042 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO,
2043 USB_EP_CAPS_DIR_OUT),
2044 },
2045 .dev = &memory,
2046 .fifo_size = ISO_FIFO_SIZE,
2047 .bEndpointAddress = 14,
2048 .bmAttributes = USB_ENDPOINT_XFER_ISOC,
2049 .reg_udccs = &UDCCS14,
2050 .reg_ubcr = &UBCR14,
2051 .reg_uddr = &UDDR14,
2052 },
2053 .ep[15] = {
2054 .ep = {
2055 .name = "ep15in-int",
2056 .ops = &pxa25x_ep_ops,
2057 .maxpacket = INT_FIFO_SIZE,
2058 .caps = USB_EP_CAPS(0, 0),
2059 },
2060 .dev = &memory,
2061 .fifo_size = INT_FIFO_SIZE,
2062 .bEndpointAddress = USB_DIR_IN | 15,
2063 .bmAttributes = USB_ENDPOINT_XFER_INT,
2064 .reg_udccs = &UDCCS15,
2065 .reg_uddr = &UDDR15,
2066 },
2067#endif
2068};
2069
2070#define CP15R0_VENDOR_MASK 0xffffe000
2071
2072#if defined(CONFIG_ARCH_PXA)
2073#define CP15R0_XSCALE_VALUE 0x69052000
2074
2075#elif defined(CONFIG_ARCH_IXP4XX)
2076#define CP15R0_XSCALE_VALUE 0x69054000
2077
2078#endif
2079
2080#define CP15R0_PROD_MASK 0x000003f0
2081#define PXA25x 0x00000100
2082#define PXA210 0x00000120
2083
2084#define CP15R0_REV_MASK 0x0000000f
2085
2086#define CP15R0_PRODREV_MASK (CP15R0_PROD_MASK | CP15R0_REV_MASK)
2087
2088#define PXA255_A0 0x00000106
2089#define PXA250_C0 0x00000105
2090#define PXA250_B2 0x00000104
2091#define PXA250_B1 0x00000103
2092#define PXA250_B0 0x00000102
2093#define PXA250_A1 0x00000101
2094#define PXA250_A0 0x00000100
2095
2096#define PXA210_C0 0x00000125
2097#define PXA210_B2 0x00000124
2098#define PXA210_B1 0x00000123
2099#define PXA210_B0 0x00000122
2100#define IXP425_A0 0x000001c1
2101#define IXP425_B0 0x000001f1
2102#define IXP465_AD 0x00000200
2103
2104
2105
2106
2107static int pxa25x_udc_probe(struct platform_device *pdev)
2108{
2109 struct pxa25x_udc *dev = &memory;
2110 int retval, irq;
2111 u32 chiprev;
2112
2113 pr_info("%s: version %s\n", driver_name, DRIVER_VERSION);
2114
2115
2116 asm("mrc%? p15, 0, %0, c0, c0" : "=r" (chiprev));
2117 if ((chiprev & CP15R0_VENDOR_MASK) != CP15R0_XSCALE_VALUE) {
2118 pr_err("%s: not XScale!\n", driver_name);
2119 return -ENODEV;
2120 }
2121
2122
2123 switch (chiprev & CP15R0_PRODREV_MASK) {
2124#if defined(CONFIG_ARCH_PXA)
2125 case PXA255_A0:
2126 dev->has_cfr = 1;
2127 break;
2128 case PXA250_A0:
2129 case PXA250_A1:
2130
2131
2132 case PXA250_B2: case PXA210_B2:
2133 case PXA250_B1: case PXA210_B1:
2134 case PXA250_B0: case PXA210_B0:
2135
2136
2137 case PXA250_C0: case PXA210_C0:
2138 break;
2139#elif defined(CONFIG_ARCH_IXP4XX)
2140 case IXP425_A0:
2141 case IXP425_B0:
2142 case IXP465_AD:
2143 dev->has_cfr = 1;
2144 break;
2145#endif
2146 default:
2147 pr_err("%s: unrecognized processor: %08x\n",
2148 driver_name, chiprev);
2149
2150 return -ENODEV;
2151 }
2152
2153 irq = platform_get_irq(pdev, 0);
2154 if (irq < 0)
2155 return -ENODEV;
2156
2157 dev->clk = devm_clk_get(&pdev->dev, NULL);
2158 if (IS_ERR(dev->clk))
2159 return PTR_ERR(dev->clk);
2160
2161 pr_debug("%s: IRQ %d%s%s\n", driver_name, irq,
2162 dev->has_cfr ? "" : " (!cfr)",
2163 SIZE_STR "(pio)"
2164 );
2165
2166
2167 dev->dev = &pdev->dev;
2168 dev->mach = dev_get_platdata(&pdev->dev);
2169
2170 dev->transceiver = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
2171
2172 if (gpio_is_valid(dev->mach->gpio_pullup)) {
2173 retval = devm_gpio_request(&pdev->dev, dev->mach->gpio_pullup,
2174 "pca25x_udc GPIO PULLUP");
2175 if (retval) {
2176 dev_dbg(&pdev->dev,
2177 "can't get pullup gpio %d, err: %d\n",
2178 dev->mach->gpio_pullup, retval);
2179 goto err;
2180 }
2181 gpio_direction_output(dev->mach->gpio_pullup, 0);
2182 }
2183
2184 init_timer(&dev->timer);
2185 dev->timer.function = udc_watchdog;
2186 dev->timer.data = (unsigned long) dev;
2187
2188 the_controller = dev;
2189 platform_set_drvdata(pdev, dev);
2190
2191 udc_disable(dev);
2192 udc_reinit(dev);
2193
2194 dev->vbus = 0;
2195
2196
2197 retval = devm_request_irq(&pdev->dev, irq, pxa25x_udc_irq, 0,
2198 driver_name, dev);
2199 if (retval != 0) {
2200 pr_err("%s: can't get irq %d, err %d\n",
2201 driver_name, irq, retval);
2202 goto err;
2203 }
2204 dev->got_irq = 1;
2205
2206#ifdef CONFIG_ARCH_LUBBOCK
2207 if (machine_is_lubbock()) {
2208 retval = devm_request_irq(&pdev->dev, LUBBOCK_USB_DISC_IRQ,
2209 lubbock_vbus_irq, 0, driver_name,
2210 dev);
2211 if (retval != 0) {
2212 pr_err("%s: can't get irq %i, err %d\n",
2213 driver_name, LUBBOCK_USB_DISC_IRQ, retval);
2214 goto err;
2215 }
2216 retval = devm_request_irq(&pdev->dev, LUBBOCK_USB_IRQ,
2217 lubbock_vbus_irq, 0, driver_name,
2218 dev);
2219 if (retval != 0) {
2220 pr_err("%s: can't get irq %i, err %d\n",
2221 driver_name, LUBBOCK_USB_IRQ, retval);
2222 goto err;
2223 }
2224 } else
2225#endif
2226 create_debug_files(dev);
2227
2228 retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget);
2229 if (!retval)
2230 return retval;
2231
2232 remove_debug_files(dev);
2233 err:
2234 if (!IS_ERR_OR_NULL(dev->transceiver))
2235 dev->transceiver = NULL;
2236 return retval;
2237}
2238
2239static void pxa25x_udc_shutdown(struct platform_device *_dev)
2240{
2241 pullup_off();
2242}
2243
2244static int pxa25x_udc_remove(struct platform_device *pdev)
2245{
2246 struct pxa25x_udc *dev = platform_get_drvdata(pdev);
2247
2248 if (dev->driver)
2249 return -EBUSY;
2250
2251 usb_del_gadget_udc(&dev->gadget);
2252 dev->pullup = 0;
2253 pullup(dev);
2254
2255 remove_debug_files(dev);
2256
2257 if (!IS_ERR_OR_NULL(dev->transceiver))
2258 dev->transceiver = NULL;
2259
2260 the_controller = NULL;
2261 return 0;
2262}
2263
2264
2265
2266#ifdef CONFIG_PM
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280static int pxa25x_udc_suspend(struct platform_device *dev, pm_message_t state)
2281{
2282 struct pxa25x_udc *udc = platform_get_drvdata(dev);
2283 unsigned long flags;
2284
2285 if (!gpio_is_valid(udc->mach->gpio_pullup) && !udc->mach->udc_command)
2286 WARNING("USB host won't detect disconnect!\n");
2287 udc->suspended = 1;
2288
2289 local_irq_save(flags);
2290 pullup(udc);
2291 local_irq_restore(flags);
2292
2293 return 0;
2294}
2295
2296static int pxa25x_udc_resume(struct platform_device *dev)
2297{
2298 struct pxa25x_udc *udc = platform_get_drvdata(dev);
2299 unsigned long flags;
2300
2301 udc->suspended = 0;
2302 local_irq_save(flags);
2303 pullup(udc);
2304 local_irq_restore(flags);
2305
2306 return 0;
2307}
2308
2309#else
2310#define pxa25x_udc_suspend NULL
2311#define pxa25x_udc_resume NULL
2312#endif
2313
2314
2315
2316static struct platform_driver udc_driver = {
2317 .shutdown = pxa25x_udc_shutdown,
2318 .probe = pxa25x_udc_probe,
2319 .remove = pxa25x_udc_remove,
2320 .suspend = pxa25x_udc_suspend,
2321 .resume = pxa25x_udc_resume,
2322 .driver = {
2323 .name = "pxa25x-udc",
2324 },
2325};
2326
2327module_platform_driver(udc_driver);
2328
2329MODULE_DESCRIPTION(DRIVER_DESC);
2330MODULE_AUTHOR("Frank Becker, Robert Schwebel, David Brownell");
2331MODULE_LICENSE("GPL");
2332MODULE_ALIAS("platform:pxa25x-udc");
2333