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Merge tag 'omap-cleanup-a-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / usb / gadget / omap_udc.c
1 /*
2 * omap_udc.c -- for OMAP full speed udc; most chips support OTG.
3 *
4 * Copyright (C) 2004 Texas Instruments, Inc.
5 * Copyright (C) 2004-2005 David Brownell
6 *
7 * OMAP2 & DMA support by Kyungmin Park <kyungmin.park@samsung.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 */
14
15 #undef DEBUG
16 #undef VERBOSE
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/ioport.h>
21 #include <linux/types.h>
22 #include <linux/errno.h>
23 #include <linux/delay.h>
24 #include <linux/slab.h>
25 #include <linux/init.h>
26 #include <linux/timer.h>
27 #include <linux/list.h>
28 #include <linux/interrupt.h>
29 #include <linux/proc_fs.h>
30 #include <linux/mm.h>
31 #include <linux/moduleparam.h>
32 #include <linux/platform_device.h>
33 #include <linux/usb/ch9.h>
34 #include <linux/usb/gadget.h>
35 #include <linux/usb/otg.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/clk.h>
38 #include <linux/prefetch.h>
39
40 #include <asm/byteorder.h>
41 #include <asm/io.h>
42 #include <asm/irq.h>
43 #include <asm/unaligned.h>
44 #include <asm/mach-types.h>
45
46 #include <plat/dma.h>
47 #include <plat/usb.h>
48
49 #include "omap_udc.h"
50
51 #undef USB_TRACE
52
53 /* bulk DMA seems to be behaving for both IN and OUT */
54 #define USE_DMA
55
56 /* ISO too */
57 #define USE_ISO
58
59 #define DRIVER_DESC "OMAP UDC driver"
60 #define DRIVER_VERSION "4 October 2004"
61
62 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
63
64 #define OMAP2_DMA_CH(ch) (((ch) - 1) << 1)
65 #define OMAP24XX_DMA(name, ch) (OMAP24XX_DMA_##name + OMAP2_DMA_CH(ch))
66
67 /*
68 * The OMAP UDC needs _very_ early endpoint setup: before enabling the
69 * D+ pullup to allow enumeration. That's too early for the gadget
70 * framework to use from usb_endpoint_enable(), which happens after
71 * enumeration as part of activating an interface. (But if we add an
72 * optional new "UDC not yet running" state to the gadget driver model,
73 * even just during driver binding, the endpoint autoconfig logic is the
74 * natural spot to manufacture new endpoints.)
75 *
76 * So instead of using endpoint enable calls to control the hardware setup,
77 * this driver defines a "fifo mode" parameter. It's used during driver
78 * initialization to choose among a set of pre-defined endpoint configs.
79 * See omap_udc_setup() for available modes, or to add others. That code
80 * lives in an init section, so use this driver as a module if you need
81 * to change the fifo mode after the kernel boots.
82 *
83 * Gadget drivers normally ignore endpoints they don't care about, and
84 * won't include them in configuration descriptors. That means only
85 * misbehaving hosts would even notice they exist.
86 */
87 #ifdef USE_ISO
88 static unsigned fifo_mode = 3;
89 #else
90 static unsigned fifo_mode = 0;
91 #endif
92
93 /* "modprobe omap_udc fifo_mode=42", or else as a kernel
94 * boot parameter "omap_udc:fifo_mode=42"
95 */
96 module_param (fifo_mode, uint, 0);
97 MODULE_PARM_DESC (fifo_mode, "endpoint configuration");
98
99 #ifdef USE_DMA
100 static bool use_dma = 1;
101
102 /* "modprobe omap_udc use_dma=y", or else as a kernel
103 * boot parameter "omap_udc:use_dma=y"
104 */
105 module_param (use_dma, bool, 0);
106 MODULE_PARM_DESC (use_dma, "enable/disable DMA");
107 #else /* !USE_DMA */
108
109 /* save a bit of code */
110 #define use_dma 0
111 #endif /* !USE_DMA */
112
113
114 static const char driver_name [] = "omap_udc";
115 static const char driver_desc [] = DRIVER_DESC;
116
117 /*-------------------------------------------------------------------------*/
118
119 /* there's a notion of "current endpoint" for modifying endpoint
120 * state, and PIO access to its FIFO.
121 */
122
123 static void use_ep(struct omap_ep *ep, u16 select)
124 {
125 u16 num = ep->bEndpointAddress & 0x0f;
126
127 if (ep->bEndpointAddress & USB_DIR_IN)
128 num |= UDC_EP_DIR;
129 omap_writew(num | select, UDC_EP_NUM);
130 /* when select, MUST deselect later !! */
131 }
132
133 static inline void deselect_ep(void)
134 {
135 u16 w;
136
137 w = omap_readw(UDC_EP_NUM);
138 w &= ~UDC_EP_SEL;
139 omap_writew(w, UDC_EP_NUM);
140 /* 6 wait states before TX will happen */
141 }
142
143 static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);
144
145 /*-------------------------------------------------------------------------*/
146
147 static int omap_ep_enable(struct usb_ep *_ep,
148 const struct usb_endpoint_descriptor *desc)
149 {
150 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
151 struct omap_udc *udc;
152 unsigned long flags;
153 u16 maxp;
154
155 /* catch various bogus parameters */
156 if (!_ep || !desc
157 || desc->bDescriptorType != USB_DT_ENDPOINT
158 || ep->bEndpointAddress != desc->bEndpointAddress
159 || ep->maxpacket < usb_endpoint_maxp(desc)) {
160 DBG("%s, bad ep or descriptor\n", __func__);
161 return -EINVAL;
162 }
163 maxp = usb_endpoint_maxp(desc);
164 if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
165 && maxp != ep->maxpacket)
166 || usb_endpoint_maxp(desc) > ep->maxpacket
167 || !desc->wMaxPacketSize) {
168 DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
169 return -ERANGE;
170 }
171
172 #ifdef USE_ISO
173 if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
174 && desc->bInterval != 1)) {
175 /* hardware wants period = 1; USB allows 2^(Interval-1) */
176 DBG("%s, unsupported ISO period %dms\n", _ep->name,
177 1 << (desc->bInterval - 1));
178 return -EDOM;
179 }
180 #else
181 if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
182 DBG("%s, ISO nyet\n", _ep->name);
183 return -EDOM;
184 }
185 #endif
186
187 /* xfer types must match, except that interrupt ~= bulk */
188 if (ep->bmAttributes != desc->bmAttributes
189 && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
190 && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
191 DBG("%s, %s type mismatch\n", __func__, _ep->name);
192 return -EINVAL;
193 }
194
195 udc = ep->udc;
196 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
197 DBG("%s, bogus device state\n", __func__);
198 return -ESHUTDOWN;
199 }
200
201 spin_lock_irqsave(&udc->lock, flags);
202
203 ep->ep.desc = desc;
204 ep->irqs = 0;
205 ep->stopped = 0;
206 ep->ep.maxpacket = maxp;
207
208 /* set endpoint to initial state */
209 ep->dma_channel = 0;
210 ep->has_dma = 0;
211 ep->lch = -1;
212 use_ep(ep, UDC_EP_SEL);
213 omap_writew(udc->clr_halt, UDC_CTRL);
214 ep->ackwait = 0;
215 deselect_ep();
216
217 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
218 list_add(&ep->iso, &udc->iso);
219
220 /* maybe assign a DMA channel to this endpoint */
221 if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK)
222 /* FIXME ISO can dma, but prefers first channel */
223 dma_channel_claim(ep, 0);
224
225 /* PIO OUT may RX packets */
226 if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
227 && !ep->has_dma
228 && !(ep->bEndpointAddress & USB_DIR_IN)) {
229 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
230 ep->ackwait = 1 + ep->double_buf;
231 }
232
233 spin_unlock_irqrestore(&udc->lock, flags);
234 VDBG("%s enabled\n", _ep->name);
235 return 0;
236 }
237
238 static void nuke(struct omap_ep *, int status);
239
240 static int omap_ep_disable(struct usb_ep *_ep)
241 {
242 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
243 unsigned long flags;
244
245 if (!_ep || !ep->ep.desc) {
246 DBG("%s, %s not enabled\n", __func__,
247 _ep ? ep->ep.name : NULL);
248 return -EINVAL;
249 }
250
251 spin_lock_irqsave(&ep->udc->lock, flags);
252 ep->ep.desc = NULL;
253 nuke (ep, -ESHUTDOWN);
254 ep->ep.maxpacket = ep->maxpacket;
255 ep->has_dma = 0;
256 omap_writew(UDC_SET_HALT, UDC_CTRL);
257 list_del_init(&ep->iso);
258 del_timer(&ep->timer);
259
260 spin_unlock_irqrestore(&ep->udc->lock, flags);
261
262 VDBG("%s disabled\n", _ep->name);
263 return 0;
264 }
265
266 /*-------------------------------------------------------------------------*/
267
268 static struct usb_request *
269 omap_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
270 {
271 struct omap_req *req;
272
273 req = kzalloc(sizeof(*req), gfp_flags);
274 if (req) {
275 req->req.dma = DMA_ADDR_INVALID;
276 INIT_LIST_HEAD (&req->queue);
277 }
278 return &req->req;
279 }
280
281 static void
282 omap_free_request(struct usb_ep *ep, struct usb_request *_req)
283 {
284 struct omap_req *req = container_of(_req, struct omap_req, req);
285
286 if (_req)
287 kfree (req);
288 }
289
290 /*-------------------------------------------------------------------------*/
291
292 static void
293 done(struct omap_ep *ep, struct omap_req *req, int status)
294 {
295 unsigned stopped = ep->stopped;
296
297 list_del_init(&req->queue);
298
299 if (req->req.status == -EINPROGRESS)
300 req->req.status = status;
301 else
302 status = req->req.status;
303
304 if (use_dma && ep->has_dma) {
305 if (req->mapped) {
306 dma_unmap_single(ep->udc->gadget.dev.parent,
307 req->req.dma, req->req.length,
308 (ep->bEndpointAddress & USB_DIR_IN)
309 ? DMA_TO_DEVICE
310 : DMA_FROM_DEVICE);
311 req->req.dma = DMA_ADDR_INVALID;
312 req->mapped = 0;
313 } else
314 dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
315 req->req.dma, req->req.length,
316 (ep->bEndpointAddress & USB_DIR_IN)
317 ? DMA_TO_DEVICE
318 : DMA_FROM_DEVICE);
319 }
320
321 #ifndef USB_TRACE
322 if (status && status != -ESHUTDOWN)
323 #endif
324 VDBG("complete %s req %p stat %d len %u/%u\n",
325 ep->ep.name, &req->req, status,
326 req->req.actual, req->req.length);
327
328 /* don't modify queue heads during completion callback */
329 ep->stopped = 1;
330 spin_unlock(&ep->udc->lock);
331 req->req.complete(&ep->ep, &req->req);
332 spin_lock(&ep->udc->lock);
333 ep->stopped = stopped;
334 }
335
336 /*-------------------------------------------------------------------------*/
337
338 #define UDC_FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
339 #define UDC_FIFO_UNWRITABLE (UDC_EP_HALTED | UDC_FIFO_FULL)
340
341 #define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
342 #define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
343
344 static inline int
345 write_packet(u8 *buf, struct omap_req *req, unsigned max)
346 {
347 unsigned len;
348 u16 *wp;
349
350 len = min(req->req.length - req->req.actual, max);
351 req->req.actual += len;
352
353 max = len;
354 if (likely((((int)buf) & 1) == 0)) {
355 wp = (u16 *)buf;
356 while (max >= 2) {
357 omap_writew(*wp++, UDC_DATA);
358 max -= 2;
359 }
360 buf = (u8 *)wp;
361 }
362 while (max--)
363 omap_writeb(*buf++, UDC_DATA);
364 return len;
365 }
366
367 // FIXME change r/w fifo calling convention
368
369
370 // return: 0 = still running, 1 = completed, negative = errno
371 static int write_fifo(struct omap_ep *ep, struct omap_req *req)
372 {
373 u8 *buf;
374 unsigned count;
375 int is_last;
376 u16 ep_stat;
377
378 buf = req->req.buf + req->req.actual;
379 prefetch(buf);
380
381 /* PIO-IN isn't double buffered except for iso */
382 ep_stat = omap_readw(UDC_STAT_FLG);
383 if (ep_stat & UDC_FIFO_UNWRITABLE)
384 return 0;
385
386 count = ep->ep.maxpacket;
387 count = write_packet(buf, req, count);
388 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
389 ep->ackwait = 1;
390
391 /* last packet is often short (sometimes a zlp) */
392 if (count != ep->ep.maxpacket)
393 is_last = 1;
394 else if (req->req.length == req->req.actual
395 && !req->req.zero)
396 is_last = 1;
397 else
398 is_last = 0;
399
400 /* NOTE: requests complete when all IN data is in a
401 * FIFO (or sometimes later, if a zlp was needed).
402 * Use usb_ep_fifo_status() where needed.
403 */
404 if (is_last)
405 done(ep, req, 0);
406 return is_last;
407 }
408
409 static inline int
410 read_packet(u8 *buf, struct omap_req *req, unsigned avail)
411 {
412 unsigned len;
413 u16 *wp;
414
415 len = min(req->req.length - req->req.actual, avail);
416 req->req.actual += len;
417 avail = len;
418
419 if (likely((((int)buf) & 1) == 0)) {
420 wp = (u16 *)buf;
421 while (avail >= 2) {
422 *wp++ = omap_readw(UDC_DATA);
423 avail -= 2;
424 }
425 buf = (u8 *)wp;
426 }
427 while (avail--)
428 *buf++ = omap_readb(UDC_DATA);
429 return len;
430 }
431
432 // return: 0 = still running, 1 = queue empty, negative = errno
433 static int read_fifo(struct omap_ep *ep, struct omap_req *req)
434 {
435 u8 *buf;
436 unsigned count, avail;
437 int is_last;
438
439 buf = req->req.buf + req->req.actual;
440 prefetchw(buf);
441
442 for (;;) {
443 u16 ep_stat = omap_readw(UDC_STAT_FLG);
444
445 is_last = 0;
446 if (ep_stat & FIFO_EMPTY) {
447 if (!ep->double_buf)
448 break;
449 ep->fnf = 1;
450 }
451 if (ep_stat & UDC_EP_HALTED)
452 break;
453
454 if (ep_stat & UDC_FIFO_FULL)
455 avail = ep->ep.maxpacket;
456 else {
457 avail = omap_readw(UDC_RXFSTAT);
458 ep->fnf = ep->double_buf;
459 }
460 count = read_packet(buf, req, avail);
461
462 /* partial packet reads may not be errors */
463 if (count < ep->ep.maxpacket) {
464 is_last = 1;
465 /* overflowed this request? flush extra data */
466 if (count != avail) {
467 req->req.status = -EOVERFLOW;
468 avail -= count;
469 while (avail--)
470 omap_readw(UDC_DATA);
471 }
472 } else if (req->req.length == req->req.actual)
473 is_last = 1;
474 else
475 is_last = 0;
476
477 if (!ep->bEndpointAddress)
478 break;
479 if (is_last)
480 done(ep, req, 0);
481 break;
482 }
483 return is_last;
484 }
485
486 /*-------------------------------------------------------------------------*/
487
488 static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
489 {
490 dma_addr_t end;
491
492 /* IN-DMA needs this on fault/cancel paths, so 15xx misreports
493 * the last transfer's bytecount by more than a FIFO's worth.
494 */
495 if (cpu_is_omap15xx())
496 return 0;
497
498 end = omap_get_dma_src_pos(ep->lch);
499 if (end == ep->dma_counter)
500 return 0;
501
502 end |= start & (0xffff << 16);
503 if (end < start)
504 end += 0x10000;
505 return end - start;
506 }
507
508 static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
509 {
510 dma_addr_t end;
511
512 end = omap_get_dma_dst_pos(ep->lch);
513 if (end == ep->dma_counter)
514 return 0;
515
516 end |= start & (0xffff << 16);
517 if (cpu_is_omap15xx())
518 end++;
519 if (end < start)
520 end += 0x10000;
521 return end - start;
522 }
523
524
525 /* Each USB transfer request using DMA maps to one or more DMA transfers.
526 * When DMA completion isn't request completion, the UDC continues with
527 * the next DMA transfer for that USB transfer.
528 */
529
530 static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
531 {
532 u16 txdma_ctrl, w;
533 unsigned length = req->req.length - req->req.actual;
534 const int sync_mode = cpu_is_omap15xx()
535 ? OMAP_DMA_SYNC_FRAME
536 : OMAP_DMA_SYNC_ELEMENT;
537 int dma_trigger = 0;
538
539 if (cpu_is_omap24xx())
540 dma_trigger = OMAP24XX_DMA(USB_W2FC_TX0, ep->dma_channel);
541
542 /* measure length in either bytes or packets */
543 if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
544 || (cpu_is_omap24xx() && length < ep->maxpacket)
545 || (cpu_is_omap15xx() && length < ep->maxpacket)) {
546 txdma_ctrl = UDC_TXN_EOT | length;
547 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
548 length, 1, sync_mode, dma_trigger, 0);
549 } else {
550 length = min(length / ep->maxpacket,
551 (unsigned) UDC_TXN_TSC + 1);
552 txdma_ctrl = length;
553 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
554 ep->ep.maxpacket >> 1, length, sync_mode,
555 dma_trigger, 0);
556 length *= ep->maxpacket;
557 }
558 omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
559 OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
560 0, 0);
561
562 omap_start_dma(ep->lch);
563 ep->dma_counter = omap_get_dma_src_pos(ep->lch);
564 w = omap_readw(UDC_DMA_IRQ_EN);
565 w |= UDC_TX_DONE_IE(ep->dma_channel);
566 omap_writew(w, UDC_DMA_IRQ_EN);
567 omap_writew(UDC_TXN_START | txdma_ctrl, UDC_TXDMA(ep->dma_channel));
568 req->dma_bytes = length;
569 }
570
571 static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
572 {
573 u16 w;
574
575 if (status == 0) {
576 req->req.actual += req->dma_bytes;
577
578 /* return if this request needs to send data or zlp */
579 if (req->req.actual < req->req.length)
580 return;
581 if (req->req.zero
582 && req->dma_bytes != 0
583 && (req->req.actual % ep->maxpacket) == 0)
584 return;
585 } else
586 req->req.actual += dma_src_len(ep, req->req.dma
587 + req->req.actual);
588
589 /* tx completion */
590 omap_stop_dma(ep->lch);
591 w = omap_readw(UDC_DMA_IRQ_EN);
592 w &= ~UDC_TX_DONE_IE(ep->dma_channel);
593 omap_writew(w, UDC_DMA_IRQ_EN);
594 done(ep, req, status);
595 }
596
597 static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
598 {
599 unsigned packets = req->req.length - req->req.actual;
600 int dma_trigger = 0;
601 u16 w;
602
603 if (cpu_is_omap24xx())
604 dma_trigger = OMAP24XX_DMA(USB_W2FC_RX0, ep->dma_channel);
605
606 /* NOTE: we filtered out "short reads" before, so we know
607 * the buffer has only whole numbers of packets.
608 * except MODE SELECT(6) sent the 24 bytes data in OMAP24XX DMA mode
609 */
610 if (cpu_is_omap24xx() && packets < ep->maxpacket) {
611 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
612 packets, 1, OMAP_DMA_SYNC_ELEMENT,
613 dma_trigger, 0);
614 req->dma_bytes = packets;
615 } else {
616 /* set up this DMA transfer, enable the fifo, start */
617 packets /= ep->ep.maxpacket;
618 packets = min(packets, (unsigned)UDC_RXN_TC + 1);
619 req->dma_bytes = packets * ep->ep.maxpacket;
620 omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
621 ep->ep.maxpacket >> 1, packets,
622 OMAP_DMA_SYNC_ELEMENT,
623 dma_trigger, 0);
624 }
625 omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
626 OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
627 0, 0);
628 ep->dma_counter = omap_get_dma_dst_pos(ep->lch);
629
630 omap_writew(UDC_RXN_STOP | (packets - 1), UDC_RXDMA(ep->dma_channel));
631 w = omap_readw(UDC_DMA_IRQ_EN);
632 w |= UDC_RX_EOT_IE(ep->dma_channel);
633 omap_writew(w, UDC_DMA_IRQ_EN);
634 omap_writew(ep->bEndpointAddress & 0xf, UDC_EP_NUM);
635 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
636
637 omap_start_dma(ep->lch);
638 }
639
640 static void
641 finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status, int one)
642 {
643 u16 count, w;
644
645 if (status == 0)
646 ep->dma_counter = (u16) (req->req.dma + req->req.actual);
647 count = dma_dest_len(ep, req->req.dma + req->req.actual);
648 count += req->req.actual;
649 if (one)
650 count--;
651 if (count <= req->req.length)
652 req->req.actual = count;
653
654 if (count != req->dma_bytes || status)
655 omap_stop_dma(ep->lch);
656
657 /* if this wasn't short, request may need another transfer */
658 else if (req->req.actual < req->req.length)
659 return;
660
661 /* rx completion */
662 w = omap_readw(UDC_DMA_IRQ_EN);
663 w &= ~UDC_RX_EOT_IE(ep->dma_channel);
664 omap_writew(w, UDC_DMA_IRQ_EN);
665 done(ep, req, status);
666 }
667
668 static void dma_irq(struct omap_udc *udc, u16 irq_src)
669 {
670 u16 dman_stat = omap_readw(UDC_DMAN_STAT);
671 struct omap_ep *ep;
672 struct omap_req *req;
673
674 /* IN dma: tx to host */
675 if (irq_src & UDC_TXN_DONE) {
676 ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
677 ep->irqs++;
678 /* can see TXN_DONE after dma abort */
679 if (!list_empty(&ep->queue)) {
680 req = container_of(ep->queue.next,
681 struct omap_req, queue);
682 finish_in_dma(ep, req, 0);
683 }
684 omap_writew(UDC_TXN_DONE, UDC_IRQ_SRC);
685
686 if (!list_empty (&ep->queue)) {
687 req = container_of(ep->queue.next,
688 struct omap_req, queue);
689 next_in_dma(ep, req);
690 }
691 }
692
693 /* OUT dma: rx from host */
694 if (irq_src & UDC_RXN_EOT) {
695 ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
696 ep->irqs++;
697 /* can see RXN_EOT after dma abort */
698 if (!list_empty(&ep->queue)) {
699 req = container_of(ep->queue.next,
700 struct omap_req, queue);
701 finish_out_dma(ep, req, 0, dman_stat & UDC_DMA_RX_SB);
702 }
703 omap_writew(UDC_RXN_EOT, UDC_IRQ_SRC);
704
705 if (!list_empty (&ep->queue)) {
706 req = container_of(ep->queue.next,
707 struct omap_req, queue);
708 next_out_dma(ep, req);
709 }
710 }
711
712 if (irq_src & UDC_RXN_CNT) {
713 ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
714 ep->irqs++;
715 /* omap15xx does this unasked... */
716 VDBG("%s, RX_CNT irq?\n", ep->ep.name);
717 omap_writew(UDC_RXN_CNT, UDC_IRQ_SRC);
718 }
719 }
720
721 static void dma_error(int lch, u16 ch_status, void *data)
722 {
723 struct omap_ep *ep = data;
724
725 /* if ch_status & OMAP_DMA_DROP_IRQ ... */
726 /* if ch_status & OMAP1_DMA_TOUT_IRQ ... */
727 ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);
728
729 /* complete current transfer ... */
730 }
731
732 static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
733 {
734 u16 reg;
735 int status, restart, is_in;
736 int dma_channel;
737
738 is_in = ep->bEndpointAddress & USB_DIR_IN;
739 if (is_in)
740 reg = omap_readw(UDC_TXDMA_CFG);
741 else
742 reg = omap_readw(UDC_RXDMA_CFG);
743 reg |= UDC_DMA_REQ; /* "pulse" activated */
744
745 ep->dma_channel = 0;
746 ep->lch = -1;
747 if (channel == 0 || channel > 3) {
748 if ((reg & 0x0f00) == 0)
749 channel = 3;
750 else if ((reg & 0x00f0) == 0)
751 channel = 2;
752 else if ((reg & 0x000f) == 0) /* preferred for ISO */
753 channel = 1;
754 else {
755 status = -EMLINK;
756 goto just_restart;
757 }
758 }
759 reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
760 ep->dma_channel = channel;
761
762 if (is_in) {
763 if (cpu_is_omap24xx())
764 dma_channel = OMAP24XX_DMA(USB_W2FC_TX0, channel);
765 else
766 dma_channel = OMAP_DMA_USB_W2FC_TX0 - 1 + channel;
767 status = omap_request_dma(dma_channel,
768 ep->ep.name, dma_error, ep, &ep->lch);
769 if (status == 0) {
770 omap_writew(reg, UDC_TXDMA_CFG);
771 /* EMIFF or SDRC */
772 omap_set_dma_src_burst_mode(ep->lch,
773 OMAP_DMA_DATA_BURST_4);
774 omap_set_dma_src_data_pack(ep->lch, 1);
775 /* TIPB */
776 omap_set_dma_dest_params(ep->lch,
777 OMAP_DMA_PORT_TIPB,
778 OMAP_DMA_AMODE_CONSTANT,
779 UDC_DATA_DMA,
780 0, 0);
781 }
782 } else {
783 if (cpu_is_omap24xx())
784 dma_channel = OMAP24XX_DMA(USB_W2FC_RX0, channel);
785 else
786 dma_channel = OMAP_DMA_USB_W2FC_RX0 - 1 + channel;
787
788 status = omap_request_dma(dma_channel,
789 ep->ep.name, dma_error, ep, &ep->lch);
790 if (status == 0) {
791 omap_writew(reg, UDC_RXDMA_CFG);
792 /* TIPB */
793 omap_set_dma_src_params(ep->lch,
794 OMAP_DMA_PORT_TIPB,
795 OMAP_DMA_AMODE_CONSTANT,
796 UDC_DATA_DMA,
797 0, 0);
798 /* EMIFF or SDRC */
799 omap_set_dma_dest_burst_mode(ep->lch,
800 OMAP_DMA_DATA_BURST_4);
801 omap_set_dma_dest_data_pack(ep->lch, 1);
802 }
803 }
804 if (status)
805 ep->dma_channel = 0;
806 else {
807 ep->has_dma = 1;
808 omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);
809
810 /* channel type P: hw synch (fifo) */
811 if (cpu_class_is_omap1() && !cpu_is_omap15xx())
812 omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
813 }
814
815 just_restart:
816 /* restart any queue, even if the claim failed */
817 restart = !ep->stopped && !list_empty(&ep->queue);
818
819 if (status)
820 DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
821 restart ? " (restart)" : "");
822 else
823 DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
824 is_in ? 't' : 'r',
825 ep->dma_channel - 1, ep->lch,
826 restart ? " (restart)" : "");
827
828 if (restart) {
829 struct omap_req *req;
830 req = container_of(ep->queue.next, struct omap_req, queue);
831 if (ep->has_dma)
832 (is_in ? next_in_dma : next_out_dma)(ep, req);
833 else {
834 use_ep(ep, UDC_EP_SEL);
835 (is_in ? write_fifo : read_fifo)(ep, req);
836 deselect_ep();
837 if (!is_in) {
838 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
839 ep->ackwait = 1 + ep->double_buf;
840 }
841 /* IN: 6 wait states before it'll tx */
842 }
843 }
844 }
845
846 static void dma_channel_release(struct omap_ep *ep)
847 {
848 int shift = 4 * (ep->dma_channel - 1);
849 u16 mask = 0x0f << shift;
850 struct omap_req *req;
851 int active;
852
853 /* abort any active usb transfer request */
854 if (!list_empty(&ep->queue))
855 req = container_of(ep->queue.next, struct omap_req, queue);
856 else
857 req = NULL;
858
859 active = omap_get_dma_active_status(ep->lch);
860
861 DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
862 active ? "active" : "idle",
863 (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
864 ep->dma_channel - 1, req);
865
866 /* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
867 * OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
868 */
869
870 /* wait till current packet DMA finishes, and fifo empties */
871 if (ep->bEndpointAddress & USB_DIR_IN) {
872 omap_writew((omap_readw(UDC_TXDMA_CFG) & ~mask) | UDC_DMA_REQ,
873 UDC_TXDMA_CFG);
874
875 if (req) {
876 finish_in_dma(ep, req, -ECONNRESET);
877
878 /* clear FIFO; hosts probably won't empty it */
879 use_ep(ep, UDC_EP_SEL);
880 omap_writew(UDC_CLR_EP, UDC_CTRL);
881 deselect_ep();
882 }
883 while (omap_readw(UDC_TXDMA_CFG) & mask)
884 udelay(10);
885 } else {
886 omap_writew((omap_readw(UDC_RXDMA_CFG) & ~mask) | UDC_DMA_REQ,
887 UDC_RXDMA_CFG);
888
889 /* dma empties the fifo */
890 while (omap_readw(UDC_RXDMA_CFG) & mask)
891 udelay(10);
892 if (req)
893 finish_out_dma(ep, req, -ECONNRESET, 0);
894 }
895 omap_free_dma(ep->lch);
896 ep->dma_channel = 0;
897 ep->lch = -1;
898 /* has_dma still set, till endpoint is fully quiesced */
899 }
900
901
902 /*-------------------------------------------------------------------------*/
903
904 static int
905 omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
906 {
907 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
908 struct omap_req *req = container_of(_req, struct omap_req, req);
909 struct omap_udc *udc;
910 unsigned long flags;
911 int is_iso = 0;
912
913 /* catch various bogus parameters */
914 if (!_req || !req->req.complete || !req->req.buf
915 || !list_empty(&req->queue)) {
916 DBG("%s, bad params\n", __func__);
917 return -EINVAL;
918 }
919 if (!_ep || (!ep->ep.desc && ep->bEndpointAddress)) {
920 DBG("%s, bad ep\n", __func__);
921 return -EINVAL;
922 }
923 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
924 if (req->req.length > ep->ep.maxpacket)
925 return -EMSGSIZE;
926 is_iso = 1;
927 }
928
929 /* this isn't bogus, but OMAP DMA isn't the only hardware to
930 * have a hard time with partial packet reads... reject it.
931 * Except OMAP2 can handle the small packets.
932 */
933 if (use_dma
934 && ep->has_dma
935 && ep->bEndpointAddress != 0
936 && (ep->bEndpointAddress & USB_DIR_IN) == 0
937 && !cpu_class_is_omap2()
938 && (req->req.length % ep->ep.maxpacket) != 0) {
939 DBG("%s, no partial packet OUT reads\n", __func__);
940 return -EMSGSIZE;
941 }
942
943 udc = ep->udc;
944 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
945 return -ESHUTDOWN;
946
947 if (use_dma && ep->has_dma) {
948 if (req->req.dma == DMA_ADDR_INVALID) {
949 req->req.dma = dma_map_single(
950 ep->udc->gadget.dev.parent,
951 req->req.buf,
952 req->req.length,
953 (ep->bEndpointAddress & USB_DIR_IN)
954 ? DMA_TO_DEVICE
955 : DMA_FROM_DEVICE);
956 req->mapped = 1;
957 } else {
958 dma_sync_single_for_device(
959 ep->udc->gadget.dev.parent,
960 req->req.dma, req->req.length,
961 (ep->bEndpointAddress & USB_DIR_IN)
962 ? DMA_TO_DEVICE
963 : DMA_FROM_DEVICE);
964 req->mapped = 0;
965 }
966 }
967
968 VDBG("%s queue req %p, len %d buf %p\n",
969 ep->ep.name, _req, _req->length, _req->buf);
970
971 spin_lock_irqsave(&udc->lock, flags);
972
973 req->req.status = -EINPROGRESS;
974 req->req.actual = 0;
975
976 /* maybe kickstart non-iso i/o queues */
977 if (is_iso) {
978 u16 w;
979
980 w = omap_readw(UDC_IRQ_EN);
981 w |= UDC_SOF_IE;
982 omap_writew(w, UDC_IRQ_EN);
983 } else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
984 int is_in;
985
986 if (ep->bEndpointAddress == 0) {
987 if (!udc->ep0_pending || !list_empty (&ep->queue)) {
988 spin_unlock_irqrestore(&udc->lock, flags);
989 return -EL2HLT;
990 }
991
992 /* empty DATA stage? */
993 is_in = udc->ep0_in;
994 if (!req->req.length) {
995
996 /* chip became CONFIGURED or ADDRESSED
997 * earlier; drivers may already have queued
998 * requests to non-control endpoints
999 */
1000 if (udc->ep0_set_config) {
1001 u16 irq_en = omap_readw(UDC_IRQ_EN);
1002
1003 irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
1004 if (!udc->ep0_reset_config)
1005 irq_en |= UDC_EPN_RX_IE
1006 | UDC_EPN_TX_IE;
1007 omap_writew(irq_en, UDC_IRQ_EN);
1008 }
1009
1010 /* STATUS for zero length DATA stages is
1011 * always an IN ... even for IN transfers,
1012 * a weird case which seem to stall OMAP.
1013 */
1014 omap_writew(UDC_EP_SEL | UDC_EP_DIR, UDC_EP_NUM);
1015 omap_writew(UDC_CLR_EP, UDC_CTRL);
1016 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1017 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1018
1019 /* cleanup */
1020 udc->ep0_pending = 0;
1021 done(ep, req, 0);
1022 req = NULL;
1023
1024 /* non-empty DATA stage */
1025 } else if (is_in) {
1026 omap_writew(UDC_EP_SEL | UDC_EP_DIR, UDC_EP_NUM);
1027 } else {
1028 if (udc->ep0_setup)
1029 goto irq_wait;
1030 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
1031 }
1032 } else {
1033 is_in = ep->bEndpointAddress & USB_DIR_IN;
1034 if (!ep->has_dma)
1035 use_ep(ep, UDC_EP_SEL);
1036 /* if ISO: SOF IRQs must be enabled/disabled! */
1037 }
1038
1039 if (ep->has_dma)
1040 (is_in ? next_in_dma : next_out_dma)(ep, req);
1041 else if (req) {
1042 if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
1043 req = NULL;
1044 deselect_ep();
1045 if (!is_in) {
1046 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1047 ep->ackwait = 1 + ep->double_buf;
1048 }
1049 /* IN: 6 wait states before it'll tx */
1050 }
1051 }
1052
1053 irq_wait:
1054 /* irq handler advances the queue */
1055 if (req != NULL)
1056 list_add_tail(&req->queue, &ep->queue);
1057 spin_unlock_irqrestore(&udc->lock, flags);
1058
1059 return 0;
1060 }
1061
1062 static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1063 {
1064 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
1065 struct omap_req *req;
1066 unsigned long flags;
1067
1068 if (!_ep || !_req)
1069 return -EINVAL;
1070
1071 spin_lock_irqsave(&ep->udc->lock, flags);
1072
1073 /* make sure it's actually queued on this endpoint */
1074 list_for_each_entry (req, &ep->queue, queue) {
1075 if (&req->req == _req)
1076 break;
1077 }
1078 if (&req->req != _req) {
1079 spin_unlock_irqrestore(&ep->udc->lock, flags);
1080 return -EINVAL;
1081 }
1082
1083 if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
1084 int channel = ep->dma_channel;
1085
1086 /* releasing the channel cancels the request,
1087 * reclaiming the channel restarts the queue
1088 */
1089 dma_channel_release(ep);
1090 dma_channel_claim(ep, channel);
1091 } else
1092 done(ep, req, -ECONNRESET);
1093 spin_unlock_irqrestore(&ep->udc->lock, flags);
1094 return 0;
1095 }
1096
1097 /*-------------------------------------------------------------------------*/
1098
1099 static int omap_ep_set_halt(struct usb_ep *_ep, int value)
1100 {
1101 struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
1102 unsigned long flags;
1103 int status = -EOPNOTSUPP;
1104
1105 spin_lock_irqsave(&ep->udc->lock, flags);
1106
1107 /* just use protocol stalls for ep0; real halts are annoying */
1108 if (ep->bEndpointAddress == 0) {
1109 if (!ep->udc->ep0_pending)
1110 status = -EINVAL;
1111 else if (value) {
1112 if (ep->udc->ep0_set_config) {
1113 WARNING("error changing config?\n");
1114 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
1115 }
1116 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
1117 ep->udc->ep0_pending = 0;
1118 status = 0;
1119 } else /* NOP */
1120 status = 0;
1121
1122 /* otherwise, all active non-ISO endpoints can halt */
1123 } else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->ep.desc) {
1124
1125 /* IN endpoints must already be idle */
1126 if ((ep->bEndpointAddress & USB_DIR_IN)
1127 && !list_empty(&ep->queue)) {
1128 status = -EAGAIN;
1129 goto done;
1130 }
1131
1132 if (value) {
1133 int channel;
1134
1135 if (use_dma && ep->dma_channel
1136 && !list_empty(&ep->queue)) {
1137 channel = ep->dma_channel;
1138 dma_channel_release(ep);
1139 } else
1140 channel = 0;
1141
1142 use_ep(ep, UDC_EP_SEL);
1143 if (omap_readw(UDC_STAT_FLG) & UDC_NON_ISO_FIFO_EMPTY) {
1144 omap_writew(UDC_SET_HALT, UDC_CTRL);
1145 status = 0;
1146 } else
1147 status = -EAGAIN;
1148 deselect_ep();
1149
1150 if (channel)
1151 dma_channel_claim(ep, channel);
1152 } else {
1153 use_ep(ep, 0);
1154 omap_writew(ep->udc->clr_halt, UDC_CTRL);
1155 ep->ackwait = 0;
1156 if (!(ep->bEndpointAddress & USB_DIR_IN)) {
1157 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1158 ep->ackwait = 1 + ep->double_buf;
1159 }
1160 }
1161 }
1162 done:
1163 VDBG("%s %s halt stat %d\n", ep->ep.name,
1164 value ? "set" : "clear", status);
1165
1166 spin_unlock_irqrestore(&ep->udc->lock, flags);
1167 return status;
1168 }
1169
1170 static struct usb_ep_ops omap_ep_ops = {
1171 .enable = omap_ep_enable,
1172 .disable = omap_ep_disable,
1173
1174 .alloc_request = omap_alloc_request,
1175 .free_request = omap_free_request,
1176
1177 .queue = omap_ep_queue,
1178 .dequeue = omap_ep_dequeue,
1179
1180 .set_halt = omap_ep_set_halt,
1181 // fifo_status ... report bytes in fifo
1182 // fifo_flush ... flush fifo
1183 };
1184
1185 /*-------------------------------------------------------------------------*/
1186
1187 static int omap_get_frame(struct usb_gadget *gadget)
1188 {
1189 u16 sof = omap_readw(UDC_SOF);
1190 return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
1191 }
1192
1193 static int omap_wakeup(struct usb_gadget *gadget)
1194 {
1195 struct omap_udc *udc;
1196 unsigned long flags;
1197 int retval = -EHOSTUNREACH;
1198
1199 udc = container_of(gadget, struct omap_udc, gadget);
1200
1201 spin_lock_irqsave(&udc->lock, flags);
1202 if (udc->devstat & UDC_SUS) {
1203 /* NOTE: OTG spec erratum says that OTG devices may
1204 * issue wakeups without host enable.
1205 */
1206 if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
1207 DBG("remote wakeup...\n");
1208 omap_writew(UDC_RMT_WKP, UDC_SYSCON2);
1209 retval = 0;
1210 }
1211
1212 /* NOTE: non-OTG systems may use SRP TOO... */
1213 } else if (!(udc->devstat & UDC_ATT)) {
1214 if (udc->transceiver)
1215 retval = otg_start_srp(udc->transceiver->otg);
1216 }
1217 spin_unlock_irqrestore(&udc->lock, flags);
1218
1219 return retval;
1220 }
1221
1222 static int
1223 omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
1224 {
1225 struct omap_udc *udc;
1226 unsigned long flags;
1227 u16 syscon1;
1228
1229 udc = container_of(gadget, struct omap_udc, gadget);
1230 spin_lock_irqsave(&udc->lock, flags);
1231 syscon1 = omap_readw(UDC_SYSCON1);
1232 if (is_selfpowered)
1233 syscon1 |= UDC_SELF_PWR;
1234 else
1235 syscon1 &= ~UDC_SELF_PWR;
1236 omap_writew(syscon1, UDC_SYSCON1);
1237 spin_unlock_irqrestore(&udc->lock, flags);
1238
1239 return 0;
1240 }
1241
1242 static int can_pullup(struct omap_udc *udc)
1243 {
1244 return udc->driver && udc->softconnect && udc->vbus_active;
1245 }
1246
1247 static void pullup_enable(struct omap_udc *udc)
1248 {
1249 u16 w;
1250
1251 w = omap_readw(UDC_SYSCON1);
1252 w |= UDC_PULLUP_EN;
1253 omap_writew(w, UDC_SYSCON1);
1254 if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
1255 u32 l;
1256
1257 l = omap_readl(OTG_CTRL);
1258 l |= OTG_BSESSVLD;
1259 omap_writel(l, OTG_CTRL);
1260 }
1261 omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
1262 }
1263
1264 static void pullup_disable(struct omap_udc *udc)
1265 {
1266 u16 w;
1267
1268 if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
1269 u32 l;
1270
1271 l = omap_readl(OTG_CTRL);
1272 l &= ~OTG_BSESSVLD;
1273 omap_writel(l, OTG_CTRL);
1274 }
1275 omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
1276 w = omap_readw(UDC_SYSCON1);
1277 w &= ~UDC_PULLUP_EN;
1278 omap_writew(w, UDC_SYSCON1);
1279 }
1280
1281 static struct omap_udc *udc;
1282
1283 static void omap_udc_enable_clock(int enable)
1284 {
1285 if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
1286 return;
1287
1288 if (enable) {
1289 clk_enable(udc->dc_clk);
1290 clk_enable(udc->hhc_clk);
1291 udelay(100);
1292 } else {
1293 clk_disable(udc->hhc_clk);
1294 clk_disable(udc->dc_clk);
1295 }
1296 }
1297
1298 /*
1299 * Called by whatever detects VBUS sessions: external transceiver
1300 * driver, or maybe GPIO0 VBUS IRQ. May request 48 MHz clock.
1301 */
1302 static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
1303 {
1304 struct omap_udc *udc;
1305 unsigned long flags;
1306 u32 l;
1307
1308 udc = container_of(gadget, struct omap_udc, gadget);
1309 spin_lock_irqsave(&udc->lock, flags);
1310 VDBG("VBUS %s\n", is_active ? "on" : "off");
1311 udc->vbus_active = (is_active != 0);
1312 if (cpu_is_omap15xx()) {
1313 /* "software" detect, ignored if !VBUS_MODE_1510 */
1314 l = omap_readl(FUNC_MUX_CTRL_0);
1315 if (is_active)
1316 l |= VBUS_CTRL_1510;
1317 else
1318 l &= ~VBUS_CTRL_1510;
1319 omap_writel(l, FUNC_MUX_CTRL_0);
1320 }
1321 if (udc->dc_clk != NULL && is_active) {
1322 if (!udc->clk_requested) {
1323 omap_udc_enable_clock(1);
1324 udc->clk_requested = 1;
1325 }
1326 }
1327 if (can_pullup(udc))
1328 pullup_enable(udc);
1329 else
1330 pullup_disable(udc);
1331 if (udc->dc_clk != NULL && !is_active) {
1332 if (udc->clk_requested) {
1333 omap_udc_enable_clock(0);
1334 udc->clk_requested = 0;
1335 }
1336 }
1337 spin_unlock_irqrestore(&udc->lock, flags);
1338 return 0;
1339 }
1340
1341 static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1342 {
1343 struct omap_udc *udc;
1344
1345 udc = container_of(gadget, struct omap_udc, gadget);
1346 if (udc->transceiver)
1347 return usb_phy_set_power(udc->transceiver, mA);
1348 return -EOPNOTSUPP;
1349 }
1350
1351 static int omap_pullup(struct usb_gadget *gadget, int is_on)
1352 {
1353 struct omap_udc *udc;
1354 unsigned long flags;
1355
1356 udc = container_of(gadget, struct omap_udc, gadget);
1357 spin_lock_irqsave(&udc->lock, flags);
1358 udc->softconnect = (is_on != 0);
1359 if (can_pullup(udc))
1360 pullup_enable(udc);
1361 else
1362 pullup_disable(udc);
1363 spin_unlock_irqrestore(&udc->lock, flags);
1364 return 0;
1365 }
1366
1367 static int omap_udc_start(struct usb_gadget_driver *driver,
1368 int (*bind)(struct usb_gadget *));
1369 static int omap_udc_stop(struct usb_gadget_driver *driver);
1370
1371 static struct usb_gadget_ops omap_gadget_ops = {
1372 .get_frame = omap_get_frame,
1373 .wakeup = omap_wakeup,
1374 .set_selfpowered = omap_set_selfpowered,
1375 .vbus_session = omap_vbus_session,
1376 .vbus_draw = omap_vbus_draw,
1377 .pullup = omap_pullup,
1378 .start = omap_udc_start,
1379 .stop = omap_udc_stop,
1380 };
1381
1382 /*-------------------------------------------------------------------------*/
1383
1384 /* dequeue ALL requests; caller holds udc->lock */
1385 static void nuke(struct omap_ep *ep, int status)
1386 {
1387 struct omap_req *req;
1388
1389 ep->stopped = 1;
1390
1391 if (use_dma && ep->dma_channel)
1392 dma_channel_release(ep);
1393
1394 use_ep(ep, 0);
1395 omap_writew(UDC_CLR_EP, UDC_CTRL);
1396 if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
1397 omap_writew(UDC_SET_HALT, UDC_CTRL);
1398
1399 while (!list_empty(&ep->queue)) {
1400 req = list_entry(ep->queue.next, struct omap_req, queue);
1401 done(ep, req, status);
1402 }
1403 }
1404
1405 /* caller holds udc->lock */
1406 static void udc_quiesce(struct omap_udc *udc)
1407 {
1408 struct omap_ep *ep;
1409
1410 udc->gadget.speed = USB_SPEED_UNKNOWN;
1411 nuke(&udc->ep[0], -ESHUTDOWN);
1412 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list)
1413 nuke(ep, -ESHUTDOWN);
1414 }
1415
1416 /*-------------------------------------------------------------------------*/
1417
1418 static void update_otg(struct omap_udc *udc)
1419 {
1420 u16 devstat;
1421
1422 if (!gadget_is_otg(&udc->gadget))
1423 return;
1424
1425 if (omap_readl(OTG_CTRL) & OTG_ID)
1426 devstat = omap_readw(UDC_DEVSTAT);
1427 else
1428 devstat = 0;
1429
1430 udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
1431 udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
1432 udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);
1433
1434 /* Enable HNP early, avoiding races on suspend irq path.
1435 * ASSUMES OTG state machine B_BUS_REQ input is true.
1436 */
1437 if (udc->gadget.b_hnp_enable) {
1438 u32 l;
1439
1440 l = omap_readl(OTG_CTRL);
1441 l |= OTG_B_HNPEN | OTG_B_BUSREQ;
1442 l &= ~OTG_PULLUP;
1443 omap_writel(l, OTG_CTRL);
1444 }
1445 }
1446
1447 static void ep0_irq(struct omap_udc *udc, u16 irq_src)
1448 {
1449 struct omap_ep *ep0 = &udc->ep[0];
1450 struct omap_req *req = NULL;
1451
1452 ep0->irqs++;
1453
1454 /* Clear any pending requests and then scrub any rx/tx state
1455 * before starting to handle the SETUP request.
1456 */
1457 if (irq_src & UDC_SETUP) {
1458 u16 ack = irq_src & (UDC_EP0_TX|UDC_EP0_RX);
1459
1460 nuke(ep0, 0);
1461 if (ack) {
1462 omap_writew(ack, UDC_IRQ_SRC);
1463 irq_src = UDC_SETUP;
1464 }
1465 }
1466
1467 /* IN/OUT packets mean we're in the DATA or STATUS stage.
1468 * This driver uses only uses protocol stalls (ep0 never halts),
1469 * and if we got this far the gadget driver already had a
1470 * chance to stall. Tries to be forgiving of host oddities.
1471 *
1472 * NOTE: the last chance gadget drivers have to stall control
1473 * requests is during their request completion callback.
1474 */
1475 if (!list_empty(&ep0->queue))
1476 req = container_of(ep0->queue.next, struct omap_req, queue);
1477
1478 /* IN == TX to host */
1479 if (irq_src & UDC_EP0_TX) {
1480 int stat;
1481
1482 omap_writew(UDC_EP0_TX, UDC_IRQ_SRC);
1483 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1484 stat = omap_readw(UDC_STAT_FLG);
1485 if (stat & UDC_ACK) {
1486 if (udc->ep0_in) {
1487 /* write next IN packet from response,
1488 * or set up the status stage.
1489 */
1490 if (req)
1491 stat = write_fifo(ep0, req);
1492 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1493 if (!req && udc->ep0_pending) {
1494 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
1495 omap_writew(UDC_CLR_EP, UDC_CTRL);
1496 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1497 omap_writew(0, UDC_EP_NUM);
1498 udc->ep0_pending = 0;
1499 } /* else: 6 wait states before it'll tx */
1500 } else {
1501 /* ack status stage of OUT transfer */
1502 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1503 if (req)
1504 done(ep0, req, 0);
1505 }
1506 req = NULL;
1507 } else if (stat & UDC_STALL) {
1508 omap_writew(UDC_CLR_HALT, UDC_CTRL);
1509 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1510 } else {
1511 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1512 }
1513 }
1514
1515 /* OUT == RX from host */
1516 if (irq_src & UDC_EP0_RX) {
1517 int stat;
1518
1519 omap_writew(UDC_EP0_RX, UDC_IRQ_SRC);
1520 omap_writew(UDC_EP_SEL, UDC_EP_NUM);
1521 stat = omap_readw(UDC_STAT_FLG);
1522 if (stat & UDC_ACK) {
1523 if (!udc->ep0_in) {
1524 stat = 0;
1525 /* read next OUT packet of request, maybe
1526 * reactiviting the fifo; stall on errors.
1527 */
1528 if (!req || (stat = read_fifo(ep0, req)) < 0) {
1529 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
1530 udc->ep0_pending = 0;
1531 stat = 0;
1532 } else if (stat == 0)
1533 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1534 omap_writew(0, UDC_EP_NUM);
1535
1536 /* activate status stage */
1537 if (stat == 1) {
1538 done(ep0, req, 0);
1539 /* that may have STALLed ep0... */
1540 omap_writew(UDC_EP_SEL | UDC_EP_DIR,
1541 UDC_EP_NUM);
1542 omap_writew(UDC_CLR_EP, UDC_CTRL);
1543 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1544 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1545 udc->ep0_pending = 0;
1546 }
1547 } else {
1548 /* ack status stage of IN transfer */
1549 omap_writew(0, UDC_EP_NUM);
1550 if (req)
1551 done(ep0, req, 0);
1552 }
1553 } else if (stat & UDC_STALL) {
1554 omap_writew(UDC_CLR_HALT, UDC_CTRL);
1555 omap_writew(0, UDC_EP_NUM);
1556 } else {
1557 omap_writew(0, UDC_EP_NUM);
1558 }
1559 }
1560
1561 /* SETUP starts all control transfers */
1562 if (irq_src & UDC_SETUP) {
1563 union u {
1564 u16 word[4];
1565 struct usb_ctrlrequest r;
1566 } u;
1567 int status = -EINVAL;
1568 struct omap_ep *ep;
1569
1570 /* read the (latest) SETUP message */
1571 do {
1572 omap_writew(UDC_SETUP_SEL, UDC_EP_NUM);
1573 /* two bytes at a time */
1574 u.word[0] = omap_readw(UDC_DATA);
1575 u.word[1] = omap_readw(UDC_DATA);
1576 u.word[2] = omap_readw(UDC_DATA);
1577 u.word[3] = omap_readw(UDC_DATA);
1578 omap_writew(0, UDC_EP_NUM);
1579 } while (omap_readw(UDC_IRQ_SRC) & UDC_SETUP);
1580
1581 #define w_value le16_to_cpu(u.r.wValue)
1582 #define w_index le16_to_cpu(u.r.wIndex)
1583 #define w_length le16_to_cpu(u.r.wLength)
1584
1585 /* Delegate almost all control requests to the gadget driver,
1586 * except for a handful of ch9 status/feature requests that
1587 * hardware doesn't autodecode _and_ the gadget API hides.
1588 */
1589 udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
1590 udc->ep0_set_config = 0;
1591 udc->ep0_pending = 1;
1592 ep0->stopped = 0;
1593 ep0->ackwait = 0;
1594 switch (u.r.bRequest) {
1595 case USB_REQ_SET_CONFIGURATION:
1596 /* udc needs to know when ep != 0 is valid */
1597 if (u.r.bRequestType != USB_RECIP_DEVICE)
1598 goto delegate;
1599 if (w_length != 0)
1600 goto do_stall;
1601 udc->ep0_set_config = 1;
1602 udc->ep0_reset_config = (w_value == 0);
1603 VDBG("set config %d\n", w_value);
1604
1605 /* update udc NOW since gadget driver may start
1606 * queueing requests immediately; clear config
1607 * later if it fails the request.
1608 */
1609 if (udc->ep0_reset_config)
1610 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
1611 else
1612 omap_writew(UDC_DEV_CFG, UDC_SYSCON2);
1613 update_otg(udc);
1614 goto delegate;
1615 case USB_REQ_CLEAR_FEATURE:
1616 /* clear endpoint halt */
1617 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1618 goto delegate;
1619 if (w_value != USB_ENDPOINT_HALT
1620 || w_length != 0)
1621 goto do_stall;
1622 ep = &udc->ep[w_index & 0xf];
1623 if (ep != ep0) {
1624 if (w_index & USB_DIR_IN)
1625 ep += 16;
1626 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
1627 || !ep->ep.desc)
1628 goto do_stall;
1629 use_ep(ep, 0);
1630 omap_writew(udc->clr_halt, UDC_CTRL);
1631 ep->ackwait = 0;
1632 if (!(ep->bEndpointAddress & USB_DIR_IN)) {
1633 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1634 ep->ackwait = 1 + ep->double_buf;
1635 }
1636 /* NOTE: assumes the host behaves sanely,
1637 * only clearing real halts. Else we may
1638 * need to kill pending transfers and then
1639 * restart the queue... very messy for DMA!
1640 */
1641 }
1642 VDBG("%s halt cleared by host\n", ep->name);
1643 goto ep0out_status_stage;
1644 case USB_REQ_SET_FEATURE:
1645 /* set endpoint halt */
1646 if (u.r.bRequestType != USB_RECIP_ENDPOINT)
1647 goto delegate;
1648 if (w_value != USB_ENDPOINT_HALT
1649 || w_length != 0)
1650 goto do_stall;
1651 ep = &udc->ep[w_index & 0xf];
1652 if (w_index & USB_DIR_IN)
1653 ep += 16;
1654 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
1655 || ep == ep0 || !ep->ep.desc)
1656 goto do_stall;
1657 if (use_dma && ep->has_dma) {
1658 /* this has rude side-effects (aborts) and
1659 * can't really work if DMA-IN is active
1660 */
1661 DBG("%s host set_halt, NYET \n", ep->name);
1662 goto do_stall;
1663 }
1664 use_ep(ep, 0);
1665 /* can't halt if fifo isn't empty... */
1666 omap_writew(UDC_CLR_EP, UDC_CTRL);
1667 omap_writew(UDC_SET_HALT, UDC_CTRL);
1668 VDBG("%s halted by host\n", ep->name);
1669 ep0out_status_stage:
1670 status = 0;
1671 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1672 omap_writew(UDC_CLR_EP, UDC_CTRL);
1673 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1674 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1675 udc->ep0_pending = 0;
1676 break;
1677 case USB_REQ_GET_STATUS:
1678 /* USB_ENDPOINT_HALT status? */
1679 if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
1680 goto intf_status;
1681
1682 /* ep0 never stalls */
1683 if (!(w_index & 0xf))
1684 goto zero_status;
1685
1686 /* only active endpoints count */
1687 ep = &udc->ep[w_index & 0xf];
1688 if (w_index & USB_DIR_IN)
1689 ep += 16;
1690 if (!ep->ep.desc)
1691 goto do_stall;
1692
1693 /* iso never stalls */
1694 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
1695 goto zero_status;
1696
1697 /* FIXME don't assume non-halted endpoints!! */
1698 ERR("%s status, can't report\n", ep->ep.name);
1699 goto do_stall;
1700
1701 intf_status:
1702 /* return interface status. if we were pedantic,
1703 * we'd detect non-existent interfaces, and stall.
1704 */
1705 if (u.r.bRequestType
1706 != (USB_DIR_IN|USB_RECIP_INTERFACE))
1707 goto delegate;
1708
1709 zero_status:
1710 /* return two zero bytes */
1711 omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
1712 omap_writew(0, UDC_DATA);
1713 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1714 omap_writew(UDC_EP_DIR, UDC_EP_NUM);
1715 status = 0;
1716 VDBG("GET_STATUS, interface %d\n", w_index);
1717 /* next, status stage */
1718 break;
1719 default:
1720 delegate:
1721 /* activate the ep0out fifo right away */
1722 if (!udc->ep0_in && w_length) {
1723 omap_writew(0, UDC_EP_NUM);
1724 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1725 }
1726
1727 /* gadget drivers see class/vendor specific requests,
1728 * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
1729 * and more
1730 */
1731 VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
1732 u.r.bRequestType, u.r.bRequest,
1733 w_value, w_index, w_length);
1734
1735 #undef w_value
1736 #undef w_index
1737 #undef w_length
1738
1739 /* The gadget driver may return an error here,
1740 * causing an immediate protocol stall.
1741 *
1742 * Else it must issue a response, either queueing a
1743 * response buffer for the DATA stage, or halting ep0
1744 * (causing a protocol stall, not a real halt). A
1745 * zero length buffer means no DATA stage.
1746 *
1747 * It's fine to issue that response after the setup()
1748 * call returns, and this IRQ was handled.
1749 */
1750 udc->ep0_setup = 1;
1751 spin_unlock(&udc->lock);
1752 status = udc->driver->setup (&udc->gadget, &u.r);
1753 spin_lock(&udc->lock);
1754 udc->ep0_setup = 0;
1755 }
1756
1757 if (status < 0) {
1758 do_stall:
1759 VDBG("req %02x.%02x protocol STALL; stat %d\n",
1760 u.r.bRequestType, u.r.bRequest, status);
1761 if (udc->ep0_set_config) {
1762 if (udc->ep0_reset_config)
1763 WARNING("error resetting config?\n");
1764 else
1765 omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
1766 }
1767 omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
1768 udc->ep0_pending = 0;
1769 }
1770 }
1771 }
1772
1773 /*-------------------------------------------------------------------------*/
1774
1775 #define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)
1776
1777 static void devstate_irq(struct omap_udc *udc, u16 irq_src)
1778 {
1779 u16 devstat, change;
1780
1781 devstat = omap_readw(UDC_DEVSTAT);
1782 change = devstat ^ udc->devstat;
1783 udc->devstat = devstat;
1784
1785 if (change & (UDC_USB_RESET|UDC_ATT)) {
1786 udc_quiesce(udc);
1787
1788 if (change & UDC_ATT) {
1789 /* driver for any external transceiver will
1790 * have called omap_vbus_session() already
1791 */
1792 if (devstat & UDC_ATT) {
1793 udc->gadget.speed = USB_SPEED_FULL;
1794 VDBG("connect\n");
1795 if (!udc->transceiver)
1796 pullup_enable(udc);
1797 // if (driver->connect) call it
1798 } else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1799 udc->gadget.speed = USB_SPEED_UNKNOWN;
1800 if (!udc->transceiver)
1801 pullup_disable(udc);
1802 DBG("disconnect, gadget %s\n",
1803 udc->driver->driver.name);
1804 if (udc->driver->disconnect) {
1805 spin_unlock(&udc->lock);
1806 udc->driver->disconnect(&udc->gadget);
1807 spin_lock(&udc->lock);
1808 }
1809 }
1810 change &= ~UDC_ATT;
1811 }
1812
1813 if (change & UDC_USB_RESET) {
1814 if (devstat & UDC_USB_RESET) {
1815 VDBG("RESET=1\n");
1816 } else {
1817 udc->gadget.speed = USB_SPEED_FULL;
1818 INFO("USB reset done, gadget %s\n",
1819 udc->driver->driver.name);
1820 /* ep0 traffic is legal from now on */
1821 omap_writew(UDC_DS_CHG_IE | UDC_EP0_IE,
1822 UDC_IRQ_EN);
1823 }
1824 change &= ~UDC_USB_RESET;
1825 }
1826 }
1827 if (change & UDC_SUS) {
1828 if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1829 // FIXME tell isp1301 to suspend/resume (?)
1830 if (devstat & UDC_SUS) {
1831 VDBG("suspend\n");
1832 update_otg(udc);
1833 /* HNP could be under way already */
1834 if (udc->gadget.speed == USB_SPEED_FULL
1835 && udc->driver->suspend) {
1836 spin_unlock(&udc->lock);
1837 udc->driver->suspend(&udc->gadget);
1838 spin_lock(&udc->lock);
1839 }
1840 if (udc->transceiver)
1841 usb_phy_set_suspend(
1842 udc->transceiver, 1);
1843 } else {
1844 VDBG("resume\n");
1845 if (udc->transceiver)
1846 usb_phy_set_suspend(
1847 udc->transceiver, 0);
1848 if (udc->gadget.speed == USB_SPEED_FULL
1849 && udc->driver->resume) {
1850 spin_unlock(&udc->lock);
1851 udc->driver->resume(&udc->gadget);
1852 spin_lock(&udc->lock);
1853 }
1854 }
1855 }
1856 change &= ~UDC_SUS;
1857 }
1858 if (!cpu_is_omap15xx() && (change & OTG_FLAGS)) {
1859 update_otg(udc);
1860 change &= ~OTG_FLAGS;
1861 }
1862
1863 change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
1864 if (change)
1865 VDBG("devstat %03x, ignore change %03x\n",
1866 devstat, change);
1867
1868 omap_writew(UDC_DS_CHG, UDC_IRQ_SRC);
1869 }
1870
1871 static irqreturn_t omap_udc_irq(int irq, void *_udc)
1872 {
1873 struct omap_udc *udc = _udc;
1874 u16 irq_src;
1875 irqreturn_t status = IRQ_NONE;
1876 unsigned long flags;
1877
1878 spin_lock_irqsave(&udc->lock, flags);
1879 irq_src = omap_readw(UDC_IRQ_SRC);
1880
1881 /* Device state change (usb ch9 stuff) */
1882 if (irq_src & UDC_DS_CHG) {
1883 devstate_irq(_udc, irq_src);
1884 status = IRQ_HANDLED;
1885 irq_src &= ~UDC_DS_CHG;
1886 }
1887
1888 /* EP0 control transfers */
1889 if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
1890 ep0_irq(_udc, irq_src);
1891 status = IRQ_HANDLED;
1892 irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
1893 }
1894
1895 /* DMA transfer completion */
1896 if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
1897 dma_irq(_udc, irq_src);
1898 status = IRQ_HANDLED;
1899 irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
1900 }
1901
1902 irq_src &= ~(UDC_IRQ_SOF | UDC_EPN_TX|UDC_EPN_RX);
1903 if (irq_src)
1904 DBG("udc_irq, unhandled %03x\n", irq_src);
1905 spin_unlock_irqrestore(&udc->lock, flags);
1906
1907 return status;
1908 }
1909
1910 /* workaround for seemingly-lost IRQs for RX ACKs... */
1911 #define PIO_OUT_TIMEOUT (jiffies + HZ/3)
1912 #define HALF_FULL(f) (!((f)&(UDC_NON_ISO_FIFO_FULL|UDC_NON_ISO_FIFO_EMPTY)))
1913
1914 static void pio_out_timer(unsigned long _ep)
1915 {
1916 struct omap_ep *ep = (void *) _ep;
1917 unsigned long flags;
1918 u16 stat_flg;
1919
1920 spin_lock_irqsave(&ep->udc->lock, flags);
1921 if (!list_empty(&ep->queue) && ep->ackwait) {
1922 use_ep(ep, UDC_EP_SEL);
1923 stat_flg = omap_readw(UDC_STAT_FLG);
1924
1925 if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
1926 || (ep->double_buf && HALF_FULL(stat_flg)))) {
1927 struct omap_req *req;
1928
1929 VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
1930 req = container_of(ep->queue.next,
1931 struct omap_req, queue);
1932 (void) read_fifo(ep, req);
1933 omap_writew(ep->bEndpointAddress, UDC_EP_NUM);
1934 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1935 ep->ackwait = 1 + ep->double_buf;
1936 } else
1937 deselect_ep();
1938 }
1939 mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
1940 spin_unlock_irqrestore(&ep->udc->lock, flags);
1941 }
1942
1943 static irqreturn_t omap_udc_pio_irq(int irq, void *_dev)
1944 {
1945 u16 epn_stat, irq_src;
1946 irqreturn_t status = IRQ_NONE;
1947 struct omap_ep *ep;
1948 int epnum;
1949 struct omap_udc *udc = _dev;
1950 struct omap_req *req;
1951 unsigned long flags;
1952
1953 spin_lock_irqsave(&udc->lock, flags);
1954 epn_stat = omap_readw(UDC_EPN_STAT);
1955 irq_src = omap_readw(UDC_IRQ_SRC);
1956
1957 /* handle OUT first, to avoid some wasteful NAKs */
1958 if (irq_src & UDC_EPN_RX) {
1959 epnum = (epn_stat >> 8) & 0x0f;
1960 omap_writew(UDC_EPN_RX, UDC_IRQ_SRC);
1961 status = IRQ_HANDLED;
1962 ep = &udc->ep[epnum];
1963 ep->irqs++;
1964
1965 omap_writew(epnum | UDC_EP_SEL, UDC_EP_NUM);
1966 ep->fnf = 0;
1967 if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
1968 ep->ackwait--;
1969 if (!list_empty(&ep->queue)) {
1970 int stat;
1971 req = container_of(ep->queue.next,
1972 struct omap_req, queue);
1973 stat = read_fifo(ep, req);
1974 if (!ep->double_buf)
1975 ep->fnf = 1;
1976 }
1977 }
1978 /* min 6 clock delay before clearing EP_SEL ... */
1979 epn_stat = omap_readw(UDC_EPN_STAT);
1980 epn_stat = omap_readw(UDC_EPN_STAT);
1981 omap_writew(epnum, UDC_EP_NUM);
1982
1983 /* enabling fifo _after_ clearing ACK, contrary to docs,
1984 * reduces lossage; timer still needed though (sigh).
1985 */
1986 if (ep->fnf) {
1987 omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
1988 ep->ackwait = 1 + ep->double_buf;
1989 }
1990 mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
1991 }
1992
1993 /* then IN transfers */
1994 else if (irq_src & UDC_EPN_TX) {
1995 epnum = epn_stat & 0x0f;
1996 omap_writew(UDC_EPN_TX, UDC_IRQ_SRC);
1997 status = IRQ_HANDLED;
1998 ep = &udc->ep[16 + epnum];
1999 ep->irqs++;
2000
2001 omap_writew(epnum | UDC_EP_DIR | UDC_EP_SEL, UDC_EP_NUM);
2002 if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
2003 ep->ackwait = 0;
2004 if (!list_empty(&ep->queue)) {
2005 req = container_of(ep->queue.next,
2006 struct omap_req, queue);
2007 (void) write_fifo(ep, req);
2008 }
2009 }
2010 /* min 6 clock delay before clearing EP_SEL ... */
2011 epn_stat = omap_readw(UDC_EPN_STAT);
2012 epn_stat = omap_readw(UDC_EPN_STAT);
2013 omap_writew(epnum | UDC_EP_DIR, UDC_EP_NUM);
2014 /* then 6 clocks before it'd tx */
2015 }
2016
2017 spin_unlock_irqrestore(&udc->lock, flags);
2018 return status;
2019 }
2020
2021 #ifdef USE_ISO
2022 static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
2023 {
2024 struct omap_udc *udc = _dev;
2025 struct omap_ep *ep;
2026 int pending = 0;
2027 unsigned long flags;
2028
2029 spin_lock_irqsave(&udc->lock, flags);
2030
2031 /* handle all non-DMA ISO transfers */
2032 list_for_each_entry (ep, &udc->iso, iso) {
2033 u16 stat;
2034 struct omap_req *req;
2035
2036 if (ep->has_dma || list_empty(&ep->queue))
2037 continue;
2038 req = list_entry(ep->queue.next, struct omap_req, queue);
2039
2040 use_ep(ep, UDC_EP_SEL);
2041 stat = omap_readw(UDC_STAT_FLG);
2042
2043 /* NOTE: like the other controller drivers, this isn't
2044 * currently reporting lost or damaged frames.
2045 */
2046 if (ep->bEndpointAddress & USB_DIR_IN) {
2047 if (stat & UDC_MISS_IN)
2048 /* done(ep, req, -EPROTO) */;
2049 else
2050 write_fifo(ep, req);
2051 } else {
2052 int status = 0;
2053
2054 if (stat & UDC_NO_RXPACKET)
2055 status = -EREMOTEIO;
2056 else if (stat & UDC_ISO_ERR)
2057 status = -EILSEQ;
2058 else if (stat & UDC_DATA_FLUSH)
2059 status = -ENOSR;
2060
2061 if (status)
2062 /* done(ep, req, status) */;
2063 else
2064 read_fifo(ep, req);
2065 }
2066 deselect_ep();
2067 /* 6 wait states before next EP */
2068
2069 ep->irqs++;
2070 if (!list_empty(&ep->queue))
2071 pending = 1;
2072 }
2073 if (!pending) {
2074 u16 w;
2075
2076 w = omap_readw(UDC_IRQ_EN);
2077 w &= ~UDC_SOF_IE;
2078 omap_writew(w, UDC_IRQ_EN);
2079 }
2080 omap_writew(UDC_IRQ_SOF, UDC_IRQ_SRC);
2081
2082 spin_unlock_irqrestore(&udc->lock, flags);
2083 return IRQ_HANDLED;
2084 }
2085 #endif
2086
2087 /*-------------------------------------------------------------------------*/
2088
2089 static inline int machine_without_vbus_sense(void)
2090 {
2091 return (machine_is_omap_innovator()
2092 || machine_is_omap_osk()
2093 || machine_is_omap_apollon()
2094 #ifndef CONFIG_MACH_OMAP_H4_OTG
2095 || machine_is_omap_h4()
2096 #endif
2097 || machine_is_sx1()
2098 || cpu_is_omap7xx() /* No known omap7xx boards with vbus sense */
2099 );
2100 }
2101
2102 static int omap_udc_start(struct usb_gadget_driver *driver,
2103 int (*bind)(struct usb_gadget *))
2104 {
2105 int status = -ENODEV;
2106 struct omap_ep *ep;
2107 unsigned long flags;
2108
2109 /* basic sanity tests */
2110 if (!udc)
2111 return -ENODEV;
2112 if (!driver
2113 // FIXME if otg, check: driver->is_otg
2114 || driver->max_speed < USB_SPEED_FULL
2115 || !bind || !driver->setup)
2116 return -EINVAL;
2117
2118 spin_lock_irqsave(&udc->lock, flags);
2119 if (udc->driver) {
2120 spin_unlock_irqrestore(&udc->lock, flags);
2121 return -EBUSY;
2122 }
2123
2124 /* reset state */
2125 list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
2126 ep->irqs = 0;
2127 if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
2128 continue;
2129 use_ep(ep, 0);
2130 omap_writew(UDC_SET_HALT, UDC_CTRL);
2131 }
2132 udc->ep0_pending = 0;
2133 udc->ep[0].irqs = 0;
2134 udc->softconnect = 1;
2135
2136 /* hook up the driver */
2137 driver->driver.bus = NULL;
2138 udc->driver = driver;
2139 udc->gadget.dev.driver = &driver->driver;
2140 spin_unlock_irqrestore(&udc->lock, flags);
2141
2142 if (udc->dc_clk != NULL)
2143 omap_udc_enable_clock(1);
2144
2145 status = bind(&udc->gadget);
2146 if (status) {
2147 DBG("bind to %s --> %d\n", driver->driver.name, status);
2148 udc->gadget.dev.driver = NULL;
2149 udc->driver = NULL;
2150 goto done;
2151 }
2152 DBG("bound to driver %s\n", driver->driver.name);
2153
2154 omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
2155
2156 /* connect to bus through transceiver */
2157 if (udc->transceiver) {
2158 status = otg_set_peripheral(udc->transceiver->otg,
2159 &udc->gadget);
2160 if (status < 0) {
2161 ERR("can't bind to transceiver\n");
2162 if (driver->unbind) {
2163 driver->unbind (&udc->gadget);
2164 udc->gadget.dev.driver = NULL;
2165 udc->driver = NULL;
2166 }
2167 goto done;
2168 }
2169 } else {
2170 if (can_pullup(udc))
2171 pullup_enable (udc);
2172 else
2173 pullup_disable (udc);
2174 }
2175
2176 /* boards that don't have VBUS sensing can't autogate 48MHz;
2177 * can't enter deep sleep while a gadget driver is active.
2178 */
2179 if (machine_without_vbus_sense())
2180 omap_vbus_session(&udc->gadget, 1);
2181
2182 done:
2183 if (udc->dc_clk != NULL)
2184 omap_udc_enable_clock(0);
2185 return status;
2186 }
2187
2188 static int omap_udc_stop(struct usb_gadget_driver *driver)
2189 {
2190 unsigned long flags;
2191 int status = -ENODEV;
2192
2193 if (!udc)
2194 return -ENODEV;
2195 if (!driver || driver != udc->driver || !driver->unbind)
2196 return -EINVAL;
2197
2198 if (udc->dc_clk != NULL)
2199 omap_udc_enable_clock(1);
2200
2201 if (machine_without_vbus_sense())
2202 omap_vbus_session(&udc->gadget, 0);
2203
2204 if (udc->transceiver)
2205 (void) otg_set_peripheral(udc->transceiver->otg, NULL);
2206 else
2207 pullup_disable(udc);
2208
2209 spin_lock_irqsave(&udc->lock, flags);
2210 udc_quiesce(udc);
2211 spin_unlock_irqrestore(&udc->lock, flags);
2212
2213 driver->unbind(&udc->gadget);
2214 udc->gadget.dev.driver = NULL;
2215 udc->driver = NULL;
2216
2217 if (udc->dc_clk != NULL)
2218 omap_udc_enable_clock(0);
2219 DBG("unregistered driver '%s'\n", driver->driver.name);
2220 return status;
2221 }
2222
2223 /*-------------------------------------------------------------------------*/
2224
2225 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2226
2227 #include <linux/seq_file.h>
2228
2229 static const char proc_filename[] = "driver/udc";
2230
2231 #define FOURBITS "%s%s%s%s"
2232 #define EIGHTBITS FOURBITS FOURBITS
2233
2234 static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
2235 {
2236 u16 stat_flg;
2237 struct omap_req *req;
2238 char buf[20];
2239
2240 use_ep(ep, 0);
2241
2242 if (use_dma && ep->has_dma)
2243 snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
2244 (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
2245 ep->dma_channel - 1, ep->lch);
2246 else
2247 buf[0] = 0;
2248
2249 stat_flg = omap_readw(UDC_STAT_FLG);
2250 seq_printf(s,
2251 "\n%s %s%s%sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
2252 ep->name, buf,
2253 ep->double_buf ? "dbuf " : "",
2254 ({char *s; switch(ep->ackwait){
2255 case 0: s = ""; break;
2256 case 1: s = "(ackw) "; break;
2257 case 2: s = "(ackw2) "; break;
2258 default: s = "(?) "; break;
2259 } s;}),
2260 ep->irqs, stat_flg,
2261 (stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
2262 (stat_flg & UDC_MISS_IN) ? "miss_in " : "",
2263 (stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
2264 (stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
2265 (stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
2266 (stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
2267 (stat_flg & UDC_EP_HALTED) ? "HALT " : "",
2268 (stat_flg & UDC_STALL) ? "STALL " : "",
2269 (stat_flg & UDC_NAK) ? "NAK " : "",
2270 (stat_flg & UDC_ACK) ? "ACK " : "",
2271 (stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
2272 (stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
2273 (stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");
2274
2275 if (list_empty (&ep->queue))
2276 seq_printf(s, "\t(queue empty)\n");
2277 else
2278 list_for_each_entry (req, &ep->queue, queue) {
2279 unsigned length = req->req.actual;
2280
2281 if (use_dma && buf[0]) {
2282 length += ((ep->bEndpointAddress & USB_DIR_IN)
2283 ? dma_src_len : dma_dest_len)
2284 (ep, req->req.dma + length);
2285 buf[0] = 0;
2286 }
2287 seq_printf(s, "\treq %p len %d/%d buf %p\n",
2288 &req->req, length,
2289 req->req.length, req->req.buf);
2290 }
2291 }
2292
2293 static char *trx_mode(unsigned m, int enabled)
2294 {
2295 switch (m) {
2296 case 0: return enabled ? "*6wire" : "unused";
2297 case 1: return "4wire";
2298 case 2: return "3wire";
2299 case 3: return "6wire";
2300 default: return "unknown";
2301 }
2302 }
2303
2304 static int proc_otg_show(struct seq_file *s)
2305 {
2306 u32 tmp;
2307 u32 trans = 0;
2308 char *ctrl_name = "(UNKNOWN)";
2309
2310 /* XXX This needs major revision for OMAP2+ */
2311 tmp = omap_readl(OTG_REV);
2312 if (cpu_class_is_omap1()) {
2313 ctrl_name = "tranceiver_ctrl";
2314 trans = omap_readw(USB_TRANSCEIVER_CTRL);
2315 }
2316 seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
2317 tmp >> 4, tmp & 0xf, ctrl_name, trans);
2318 tmp = omap_readw(OTG_SYSCON_1);
2319 seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
2320 FOURBITS "\n", tmp,
2321 trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
2322 trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
2323 (USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
2324 ? "internal"
2325 : trx_mode(USB0_TRX_MODE(tmp), 1),
2326 (tmp & OTG_IDLE_EN) ? " !otg" : "",
2327 (tmp & HST_IDLE_EN) ? " !host" : "",
2328 (tmp & DEV_IDLE_EN) ? " !dev" : "",
2329 (tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
2330 tmp = omap_readl(OTG_SYSCON_2);
2331 seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
2332 " b_ase_brst=%d hmc=%d\n", tmp,
2333 (tmp & OTG_EN) ? " otg_en" : "",
2334 (tmp & USBX_SYNCHRO) ? " synchro" : "",
2335 // much more SRP stuff
2336 (tmp & SRP_DATA) ? " srp_data" : "",
2337 (tmp & SRP_VBUS) ? " srp_vbus" : "",
2338 (tmp & OTG_PADEN) ? " otg_paden" : "",
2339 (tmp & HMC_PADEN) ? " hmc_paden" : "",
2340 (tmp & UHOST_EN) ? " uhost_en" : "",
2341 (tmp & HMC_TLLSPEED) ? " tllspeed" : "",
2342 (tmp & HMC_TLLATTACH) ? " tllattach" : "",
2343 B_ASE_BRST(tmp),
2344 OTG_HMC(tmp));
2345 tmp = omap_readl(OTG_CTRL);
2346 seq_printf(s, "otg_ctrl %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
2347 (tmp & OTG_ASESSVLD) ? " asess" : "",
2348 (tmp & OTG_BSESSEND) ? " bsess_end" : "",
2349 (tmp & OTG_BSESSVLD) ? " bsess" : "",
2350 (tmp & OTG_VBUSVLD) ? " vbus" : "",
2351 (tmp & OTG_ID) ? " id" : "",
2352 (tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
2353 (tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
2354 (tmp & OTG_A_BUSREQ) ? " a_bus" : "",
2355 (tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
2356 (tmp & OTG_B_BUSREQ) ? " b_bus" : "",
2357 (tmp & OTG_BUSDROP) ? " busdrop" : "",
2358 (tmp & OTG_PULLDOWN) ? " down" : "",
2359 (tmp & OTG_PULLUP) ? " up" : "",
2360 (tmp & OTG_DRV_VBUS) ? " drv" : "",
2361 (tmp & OTG_PD_VBUS) ? " pd_vb" : "",
2362 (tmp & OTG_PU_VBUS) ? " pu_vb" : "",
2363 (tmp & OTG_PU_ID) ? " pu_id" : ""
2364 );
2365 tmp = omap_readw(OTG_IRQ_EN);
2366 seq_printf(s, "otg_irq_en %04x" "\n", tmp);
2367 tmp = omap_readw(OTG_IRQ_SRC);
2368 seq_printf(s, "otg_irq_src %04x" "\n", tmp);
2369 tmp = omap_readw(OTG_OUTCTRL);
2370 seq_printf(s, "otg_outctrl %04x" "\n", tmp);
2371 tmp = omap_readw(OTG_TEST);
2372 seq_printf(s, "otg_test %04x" "\n", tmp);
2373 return 0;
2374 }
2375
2376 static int proc_udc_show(struct seq_file *s, void *_)
2377 {
2378 u32 tmp;
2379 struct omap_ep *ep;
2380 unsigned long flags;
2381
2382 spin_lock_irqsave(&udc->lock, flags);
2383
2384 seq_printf(s, "%s, version: " DRIVER_VERSION
2385 #ifdef USE_ISO
2386 " (iso)"
2387 #endif
2388 "%s\n",
2389 driver_desc,
2390 use_dma ? " (dma)" : "");
2391
2392 tmp = omap_readw(UDC_REV) & 0xff;
2393 seq_printf(s,
2394 "UDC rev %d.%d, fifo mode %d, gadget %s\n"
2395 "hmc %d, transceiver %s\n",
2396 tmp >> 4, tmp & 0xf,
2397 fifo_mode,
2398 udc->driver ? udc->driver->driver.name : "(none)",
2399 HMC,
2400 udc->transceiver
2401 ? udc->transceiver->label
2402 : ((cpu_is_omap1710() || cpu_is_omap24xx())
2403 ? "external" : "(none)"));
2404 if (cpu_class_is_omap1()) {
2405 seq_printf(s, "ULPD control %04x req %04x status %04x\n",
2406 omap_readw(ULPD_CLOCK_CTRL),
2407 omap_readw(ULPD_SOFT_REQ),
2408 omap_readw(ULPD_STATUS_REQ));
2409 }
2410
2411 /* OTG controller registers */
2412 if (!cpu_is_omap15xx())
2413 proc_otg_show(s);
2414
2415 tmp = omap_readw(UDC_SYSCON1);
2416 seq_printf(s, "\nsyscon1 %04x" EIGHTBITS "\n", tmp,
2417 (tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
2418 (tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
2419 (tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
2420 (tmp & UDC_NAK_EN) ? " nak" : "",
2421 (tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
2422 (tmp & UDC_SELF_PWR) ? " self_pwr" : "",
2423 (tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
2424 (tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
2425 // syscon2 is write-only
2426
2427 /* UDC controller registers */
2428 if (!(tmp & UDC_PULLUP_EN)) {
2429 seq_printf(s, "(suspended)\n");
2430 spin_unlock_irqrestore(&udc->lock, flags);
2431 return 0;
2432 }
2433
2434 tmp = omap_readw(UDC_DEVSTAT);
2435 seq_printf(s, "devstat %04x" EIGHTBITS "%s%s\n", tmp,
2436 (tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
2437 (tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
2438 (tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
2439 (tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
2440 (tmp & UDC_USB_RESET) ? " usb_reset" : "",
2441 (tmp & UDC_SUS) ? " SUS" : "",
2442 (tmp & UDC_CFG) ? " CFG" : "",
2443 (tmp & UDC_ADD) ? " ADD" : "",
2444 (tmp & UDC_DEF) ? " DEF" : "",
2445 (tmp & UDC_ATT) ? " ATT" : "");
2446 seq_printf(s, "sof %04x\n", omap_readw(UDC_SOF));
2447 tmp = omap_readw(UDC_IRQ_EN);
2448 seq_printf(s, "irq_en %04x" FOURBITS "%s\n", tmp,
2449 (tmp & UDC_SOF_IE) ? " sof" : "",
2450 (tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
2451 (tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
2452 (tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
2453 (tmp & UDC_EP0_IE) ? " ep0" : "");
2454 tmp = omap_readw(UDC_IRQ_SRC);
2455 seq_printf(s, "irq_src %04x" EIGHTBITS "%s%s\n", tmp,
2456 (tmp & UDC_TXN_DONE) ? " txn_done" : "",
2457 (tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
2458 (tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
2459 (tmp & UDC_IRQ_SOF) ? " sof" : "",
2460 (tmp & UDC_EPN_RX) ? " epn_rx" : "",
2461 (tmp & UDC_EPN_TX) ? " epn_tx" : "",
2462 (tmp & UDC_DS_CHG) ? " ds_chg" : "",
2463 (tmp & UDC_SETUP) ? " setup" : "",
2464 (tmp & UDC_EP0_RX) ? " ep0out" : "",
2465 (tmp & UDC_EP0_TX) ? " ep0in" : "");
2466 if (use_dma) {
2467 unsigned i;
2468
2469 tmp = omap_readw(UDC_DMA_IRQ_EN);
2470 seq_printf(s, "dma_irq_en %04x%s" EIGHTBITS "\n", tmp,
2471 (tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
2472 (tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
2473 (tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",
2474
2475 (tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
2476 (tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
2477 (tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",
2478
2479 (tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
2480 (tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
2481 (tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");
2482
2483 tmp = omap_readw(UDC_RXDMA_CFG);
2484 seq_printf(s, "rxdma_cfg %04x\n", tmp);
2485 if (tmp) {
2486 for (i = 0; i < 3; i++) {
2487 if ((tmp & (0x0f << (i * 4))) == 0)
2488 continue;
2489 seq_printf(s, "rxdma[%d] %04x\n", i,
2490 omap_readw(UDC_RXDMA(i + 1)));
2491 }
2492 }
2493 tmp = omap_readw(UDC_TXDMA_CFG);
2494 seq_printf(s, "txdma_cfg %04x\n", tmp);
2495 if (tmp) {
2496 for (i = 0; i < 3; i++) {
2497 if (!(tmp & (0x0f << (i * 4))))
2498 continue;
2499 seq_printf(s, "txdma[%d] %04x\n", i,
2500 omap_readw(UDC_TXDMA(i + 1)));
2501 }
2502 }
2503 }
2504
2505 tmp = omap_readw(UDC_DEVSTAT);
2506 if (tmp & UDC_ATT) {
2507 proc_ep_show(s, &udc->ep[0]);
2508 if (tmp & UDC_ADD) {
2509 list_for_each_entry (ep, &udc->gadget.ep_list,
2510 ep.ep_list) {
2511 if (ep->ep.desc)
2512 proc_ep_show(s, ep);
2513 }
2514 }
2515 }
2516 spin_unlock_irqrestore(&udc->lock, flags);
2517 return 0;
2518 }
2519
2520 static int proc_udc_open(struct inode *inode, struct file *file)
2521 {
2522 return single_open(file, proc_udc_show, NULL);
2523 }
2524
2525 static const struct file_operations proc_ops = {
2526 .owner = THIS_MODULE,
2527 .open = proc_udc_open,
2528 .read = seq_read,
2529 .llseek = seq_lseek,
2530 .release = single_release,
2531 };
2532
2533 static void create_proc_file(void)
2534 {
2535 proc_create(proc_filename, 0, NULL, &proc_ops);
2536 }
2537
2538 static void remove_proc_file(void)
2539 {
2540 remove_proc_entry(proc_filename, NULL);
2541 }
2542
2543 #else
2544
2545 static inline void create_proc_file(void) {}
2546 static inline void remove_proc_file(void) {}
2547
2548 #endif
2549
2550 /*-------------------------------------------------------------------------*/
2551
2552 /* Before this controller can enumerate, we need to pick an endpoint
2553 * configuration, or "fifo_mode" That involves allocating 2KB of packet
2554 * buffer space among the endpoints we'll be operating.
2555 *
2556 * NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
2557 * UDC_SYSCON_1.CFG_LOCK is set can now work. We won't use that
2558 * capability yet though.
2559 */
2560 static unsigned __init
2561 omap_ep_setup(char *name, u8 addr, u8 type,
2562 unsigned buf, unsigned maxp, int dbuf)
2563 {
2564 struct omap_ep *ep;
2565 u16 epn_rxtx = 0;
2566
2567 /* OUT endpoints first, then IN */
2568 ep = &udc->ep[addr & 0xf];
2569 if (addr & USB_DIR_IN)
2570 ep += 16;
2571
2572 /* in case of ep init table bugs */
2573 BUG_ON(ep->name[0]);
2574
2575 /* chip setup ... bit values are same for IN, OUT */
2576 if (type == USB_ENDPOINT_XFER_ISOC) {
2577 switch (maxp) {
2578 case 8: epn_rxtx = 0 << 12; break;
2579 case 16: epn_rxtx = 1 << 12; break;
2580 case 32: epn_rxtx = 2 << 12; break;
2581 case 64: epn_rxtx = 3 << 12; break;
2582 case 128: epn_rxtx = 4 << 12; break;
2583 case 256: epn_rxtx = 5 << 12; break;
2584 case 512: epn_rxtx = 6 << 12; break;
2585 default: BUG();
2586 }
2587 epn_rxtx |= UDC_EPN_RX_ISO;
2588 dbuf = 1;
2589 } else {
2590 /* double-buffering "not supported" on 15xx,
2591 * and ignored for PIO-IN on newer chips
2592 * (for more reliable behavior)
2593 */
2594 if (!use_dma || cpu_is_omap15xx() || cpu_is_omap24xx())
2595 dbuf = 0;
2596
2597 switch (maxp) {
2598 case 8: epn_rxtx = 0 << 12; break;
2599 case 16: epn_rxtx = 1 << 12; break;
2600 case 32: epn_rxtx = 2 << 12; break;
2601 case 64: epn_rxtx = 3 << 12; break;
2602 default: BUG();
2603 }
2604 if (dbuf && addr)
2605 epn_rxtx |= UDC_EPN_RX_DB;
2606 init_timer(&ep->timer);
2607 ep->timer.function = pio_out_timer;
2608 ep->timer.data = (unsigned long) ep;
2609 }
2610 if (addr)
2611 epn_rxtx |= UDC_EPN_RX_VALID;
2612 BUG_ON(buf & 0x07);
2613 epn_rxtx |= buf >> 3;
2614
2615 DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
2616 name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);
2617
2618 if (addr & USB_DIR_IN)
2619 omap_writew(epn_rxtx, UDC_EP_TX(addr & 0xf));
2620 else
2621 omap_writew(epn_rxtx, UDC_EP_RX(addr));
2622
2623 /* next endpoint's buffer starts after this one's */
2624 buf += maxp;
2625 if (dbuf)
2626 buf += maxp;
2627 BUG_ON(buf > 2048);
2628
2629 /* set up driver data structures */
2630 BUG_ON(strlen(name) >= sizeof ep->name);
2631 strlcpy(ep->name, name, sizeof ep->name);
2632 INIT_LIST_HEAD(&ep->queue);
2633 INIT_LIST_HEAD(&ep->iso);
2634 ep->bEndpointAddress = addr;
2635 ep->bmAttributes = type;
2636 ep->double_buf = dbuf;
2637 ep->udc = udc;
2638
2639 ep->ep.name = ep->name;
2640 ep->ep.ops = &omap_ep_ops;
2641 ep->ep.maxpacket = ep->maxpacket = maxp;
2642 list_add_tail (&ep->ep.ep_list, &udc->gadget.ep_list);
2643
2644 return buf;
2645 }
2646
2647 static void omap_udc_release(struct device *dev)
2648 {
2649 complete(udc->done);
2650 kfree (udc);
2651 udc = NULL;
2652 }
2653
2654 static int __init
2655 omap_udc_setup(struct platform_device *odev, struct usb_phy *xceiv)
2656 {
2657 unsigned tmp, buf;
2658
2659 /* abolish any previous hardware state */
2660 omap_writew(0, UDC_SYSCON1);
2661 omap_writew(0, UDC_IRQ_EN);
2662 omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
2663 omap_writew(0, UDC_DMA_IRQ_EN);
2664 omap_writew(0, UDC_RXDMA_CFG);
2665 omap_writew(0, UDC_TXDMA_CFG);
2666
2667 /* UDC_PULLUP_EN gates the chip clock */
2668 // OTG_SYSCON_1 |= DEV_IDLE_EN;
2669
2670 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2671 if (!udc)
2672 return -ENOMEM;
2673
2674 spin_lock_init (&udc->lock);
2675
2676 udc->gadget.ops = &omap_gadget_ops;
2677 udc->gadget.ep0 = &udc->ep[0].ep;
2678 INIT_LIST_HEAD(&udc->gadget.ep_list);
2679 INIT_LIST_HEAD(&udc->iso);
2680 udc->gadget.speed = USB_SPEED_UNKNOWN;
2681 udc->gadget.max_speed = USB_SPEED_FULL;
2682 udc->gadget.name = driver_name;
2683
2684 device_initialize(&udc->gadget.dev);
2685 dev_set_name(&udc->gadget.dev, "gadget");
2686 udc->gadget.dev.release = omap_udc_release;
2687 udc->gadget.dev.parent = &odev->dev;
2688 if (use_dma)
2689 udc->gadget.dev.dma_mask = odev->dev.dma_mask;
2690
2691 udc->transceiver = xceiv;
2692
2693 /* ep0 is special; put it right after the SETUP buffer */
2694 buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
2695 8 /* after SETUP */, 64 /* maxpacket */, 0);
2696 list_del_init(&udc->ep[0].ep.ep_list);
2697
2698 /* initially disable all non-ep0 endpoints */
2699 for (tmp = 1; tmp < 15; tmp++) {
2700 omap_writew(0, UDC_EP_RX(tmp));
2701 omap_writew(0, UDC_EP_TX(tmp));
2702 }
2703
2704 #define OMAP_BULK_EP(name,addr) \
2705 buf = omap_ep_setup(name "-bulk", addr, \
2706 USB_ENDPOINT_XFER_BULK, buf, 64, 1);
2707 #define OMAP_INT_EP(name,addr, maxp) \
2708 buf = omap_ep_setup(name "-int", addr, \
2709 USB_ENDPOINT_XFER_INT, buf, maxp, 0);
2710 #define OMAP_ISO_EP(name,addr, maxp) \
2711 buf = omap_ep_setup(name "-iso", addr, \
2712 USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);
2713
2714 switch (fifo_mode) {
2715 case 0:
2716 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2717 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
2718 OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
2719 break;
2720 case 1:
2721 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2722 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
2723 OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
2724
2725 OMAP_BULK_EP("ep3in", USB_DIR_IN | 3);
2726 OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
2727 OMAP_INT_EP("ep10in", USB_DIR_IN | 10, 16);
2728
2729 OMAP_BULK_EP("ep5in", USB_DIR_IN | 5);
2730 OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
2731 OMAP_INT_EP("ep11in", USB_DIR_IN | 11, 16);
2732
2733 OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
2734 OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
2735 OMAP_INT_EP("ep12in", USB_DIR_IN | 12, 16);
2736
2737 OMAP_BULK_EP("ep7in", USB_DIR_IN | 7);
2738 OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
2739 OMAP_INT_EP("ep13in", USB_DIR_IN | 13, 16);
2740 OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);
2741
2742 OMAP_BULK_EP("ep8in", USB_DIR_IN | 8);
2743 OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
2744 OMAP_INT_EP("ep14in", USB_DIR_IN | 14, 16);
2745 OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);
2746
2747 OMAP_BULK_EP("ep15in", USB_DIR_IN | 15);
2748 OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);
2749
2750 break;
2751
2752 #ifdef USE_ISO
2753 case 2: /* mixed iso/bulk */
2754 OMAP_ISO_EP("ep1in", USB_DIR_IN | 1, 256);
2755 OMAP_ISO_EP("ep2out", USB_DIR_OUT | 2, 256);
2756 OMAP_ISO_EP("ep3in", USB_DIR_IN | 3, 128);
2757 OMAP_ISO_EP("ep4out", USB_DIR_OUT | 4, 128);
2758
2759 OMAP_INT_EP("ep5in", USB_DIR_IN | 5, 16);
2760
2761 OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
2762 OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
2763 OMAP_INT_EP("ep8in", USB_DIR_IN | 8, 16);
2764 break;
2765 case 3: /* mixed bulk/iso */
2766 OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
2767 OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
2768 OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
2769
2770 OMAP_BULK_EP("ep4in", USB_DIR_IN | 4);
2771 OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
2772 OMAP_INT_EP("ep6in", USB_DIR_IN | 6, 16);
2773
2774 OMAP_ISO_EP("ep7in", USB_DIR_IN | 7, 256);
2775 OMAP_ISO_EP("ep8out", USB_DIR_OUT | 8, 256);
2776 OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
2777 break;
2778 #endif
2779
2780 /* add more modes as needed */
2781
2782 default:
2783 ERR("unsupported fifo_mode #%d\n", fifo_mode);
2784 return -ENODEV;
2785 }
2786 omap_writew(UDC_CFG_LOCK|UDC_SELF_PWR, UDC_SYSCON1);
2787 INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
2788 return 0;
2789 }
2790
2791 static int __init omap_udc_probe(struct platform_device *pdev)
2792 {
2793 int status = -ENODEV;
2794 int hmc;
2795 struct usb_phy *xceiv = NULL;
2796 const char *type = NULL;
2797 struct omap_usb_config *config = pdev->dev.platform_data;
2798 struct clk *dc_clk;
2799 struct clk *hhc_clk;
2800
2801 /* NOTE: "knows" the order of the resources! */
2802 if (!request_mem_region(pdev->resource[0].start,
2803 pdev->resource[0].end - pdev->resource[0].start + 1,
2804 driver_name)) {
2805 DBG("request_mem_region failed\n");
2806 return -EBUSY;
2807 }
2808
2809 if (cpu_is_omap16xx()) {
2810 dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
2811 hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
2812 BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
2813 /* can't use omap_udc_enable_clock yet */
2814 clk_enable(dc_clk);
2815 clk_enable(hhc_clk);
2816 udelay(100);
2817 }
2818
2819 if (cpu_is_omap24xx()) {
2820 dc_clk = clk_get(&pdev->dev, "usb_fck");
2821 hhc_clk = clk_get(&pdev->dev, "usb_l4_ick");
2822 BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
2823 /* can't use omap_udc_enable_clock yet */
2824 clk_enable(dc_clk);
2825 clk_enable(hhc_clk);
2826 udelay(100);
2827 }
2828
2829 if (cpu_is_omap7xx()) {
2830 dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
2831 hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
2832 BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
2833 /* can't use omap_udc_enable_clock yet */
2834 clk_enable(dc_clk);
2835 clk_enable(hhc_clk);
2836 udelay(100);
2837 }
2838
2839 INFO("OMAP UDC rev %d.%d%s\n",
2840 omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
2841 config->otg ? ", Mini-AB" : "");
2842
2843 /* use the mode given to us by board init code */
2844 if (cpu_is_omap15xx()) {
2845 hmc = HMC_1510;
2846 type = "(unknown)";
2847
2848 if (machine_without_vbus_sense()) {
2849 /* just set up software VBUS detect, and then
2850 * later rig it so we always report VBUS.
2851 * FIXME without really sensing VBUS, we can't
2852 * know when to turn PULLUP_EN on/off; and that
2853 * means we always "need" the 48MHz clock.
2854 */
2855 u32 tmp = omap_readl(FUNC_MUX_CTRL_0);
2856 tmp &= ~VBUS_CTRL_1510;
2857 omap_writel(tmp, FUNC_MUX_CTRL_0);
2858 tmp |= VBUS_MODE_1510;
2859 tmp &= ~VBUS_CTRL_1510;
2860 omap_writel(tmp, FUNC_MUX_CTRL_0);
2861 }
2862 } else {
2863 /* The transceiver may package some GPIO logic or handle
2864 * loopback and/or transceiverless setup; if we find one,
2865 * use it. Except for OTG, we don't _need_ to talk to one;
2866 * but not having one probably means no VBUS detection.
2867 */
2868 xceiv = usb_get_transceiver();
2869 if (xceiv)
2870 type = xceiv->label;
2871 else if (config->otg) {
2872 DBG("OTG requires external transceiver!\n");
2873 goto cleanup0;
2874 }
2875
2876 hmc = HMC_1610;
2877
2878 if (cpu_is_omap24xx()) {
2879 /* this could be transceiverless in one of the
2880 * "we don't need to know" modes.
2881 */
2882 type = "external";
2883 goto known;
2884 }
2885
2886 switch (hmc) {
2887 case 0: /* POWERUP DEFAULT == 0 */
2888 case 4:
2889 case 12:
2890 case 20:
2891 if (!cpu_is_omap1710()) {
2892 type = "integrated";
2893 break;
2894 }
2895 /* FALL THROUGH */
2896 case 3:
2897 case 11:
2898 case 16:
2899 case 19:
2900 case 25:
2901 if (!xceiv) {
2902 DBG("external transceiver not registered!\n");
2903 type = "unknown";
2904 }
2905 break;
2906 case 21: /* internal loopback */
2907 type = "loopback";
2908 break;
2909 case 14: /* transceiverless */
2910 if (cpu_is_omap1710())
2911 goto bad_on_1710;
2912 /* FALL THROUGH */
2913 case 13:
2914 case 15:
2915 type = "no";
2916 break;
2917
2918 default:
2919 bad_on_1710:
2920 ERR("unrecognized UDC HMC mode %d\n", hmc);
2921 goto cleanup0;
2922 }
2923 }
2924 known:
2925 INFO("hmc mode %d, %s transceiver\n", hmc, type);
2926
2927 /* a "gadget" abstracts/virtualizes the controller */
2928 status = omap_udc_setup(pdev, xceiv);
2929 if (status) {
2930 goto cleanup0;
2931 }
2932 xceiv = NULL;
2933 // "udc" is now valid
2934 pullup_disable(udc);
2935 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
2936 udc->gadget.is_otg = (config->otg != 0);
2937 #endif
2938
2939 /* starting with omap1710 es2.0, clear toggle is a separate bit */
2940 if (omap_readw(UDC_REV) >= 0x61)
2941 udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
2942 else
2943 udc->clr_halt = UDC_RESET_EP;
2944
2945 /* USB general purpose IRQ: ep0, state changes, dma, etc */
2946 status = request_irq(pdev->resource[1].start, omap_udc_irq,
2947 IRQF_SAMPLE_RANDOM, driver_name, udc);
2948 if (status != 0) {
2949 ERR("can't get irq %d, err %d\n",
2950 (int) pdev->resource[1].start, status);
2951 goto cleanup1;
2952 }
2953
2954 /* USB "non-iso" IRQ (PIO for all but ep0) */
2955 status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
2956 IRQF_SAMPLE_RANDOM, "omap_udc pio", udc);
2957 if (status != 0) {
2958 ERR("can't get irq %d, err %d\n",
2959 (int) pdev->resource[2].start, status);
2960 goto cleanup2;
2961 }
2962 #ifdef USE_ISO
2963 status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
2964 0, "omap_udc iso", udc);
2965 if (status != 0) {
2966 ERR("can't get irq %d, err %d\n",
2967 (int) pdev->resource[3].start, status);
2968 goto cleanup3;
2969 }
2970 #endif
2971 if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
2972 udc->dc_clk = dc_clk;
2973 udc->hhc_clk = hhc_clk;
2974 clk_disable(hhc_clk);
2975 clk_disable(dc_clk);
2976 }
2977
2978 if (cpu_is_omap24xx()) {
2979 udc->dc_clk = dc_clk;
2980 udc->hhc_clk = hhc_clk;
2981 /* FIXME OMAP2 don't release hhc & dc clock */
2982 #if 0
2983 clk_disable(hhc_clk);
2984 clk_disable(dc_clk);
2985 #endif
2986 }
2987
2988 create_proc_file();
2989 status = device_add(&udc->gadget.dev);
2990 if (status)
2991 goto cleanup4;
2992
2993 status = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
2994 if (!status)
2995 return status;
2996 /* If fail, fall through */
2997 cleanup4:
2998 remove_proc_file();
2999
3000 #ifdef USE_ISO
3001 cleanup3:
3002 free_irq(pdev->resource[2].start, udc);
3003 #endif
3004
3005 cleanup2:
3006 free_irq(pdev->resource[1].start, udc);
3007
3008 cleanup1:
3009 kfree (udc);
3010 udc = NULL;
3011
3012 cleanup0:
3013 if (xceiv)
3014 usb_put_transceiver(xceiv);
3015
3016 if (cpu_is_omap16xx() || cpu_is_omap24xx() || cpu_is_omap7xx()) {
3017 clk_disable(hhc_clk);
3018 clk_disable(dc_clk);
3019 clk_put(hhc_clk);
3020 clk_put(dc_clk);
3021 }
3022
3023 release_mem_region(pdev->resource[0].start,
3024 pdev->resource[0].end - pdev->resource[0].start + 1);
3025
3026 return status;
3027 }
3028
3029 static int __exit omap_udc_remove(struct platform_device *pdev)
3030 {
3031 DECLARE_COMPLETION_ONSTACK(done);
3032
3033 if (!udc)
3034 return -ENODEV;
3035
3036 usb_del_gadget_udc(&udc->gadget);
3037 if (udc->driver)
3038 return -EBUSY;
3039
3040 udc->done = &done;
3041
3042 pullup_disable(udc);
3043 if (udc->transceiver) {
3044 usb_put_transceiver(udc->transceiver);
3045 udc->transceiver = NULL;
3046 }
3047 omap_writew(0, UDC_SYSCON1);
3048
3049 remove_proc_file();
3050
3051 #ifdef USE_ISO
3052 free_irq(pdev->resource[3].start, udc);
3053 #endif
3054 free_irq(pdev->resource[2].start, udc);
3055 free_irq(pdev->resource[1].start, udc);
3056
3057 if (udc->dc_clk) {
3058 if (udc->clk_requested)
3059 omap_udc_enable_clock(0);
3060 clk_put(udc->hhc_clk);
3061 clk_put(udc->dc_clk);
3062 }
3063
3064 release_mem_region(pdev->resource[0].start,
3065 pdev->resource[0].end - pdev->resource[0].start + 1);
3066
3067 device_unregister(&udc->gadget.dev);
3068 wait_for_completion(&done);
3069
3070 return 0;
3071 }
3072
3073 /* suspend/resume/wakeup from sysfs (echo > power/state) or when the
3074 * system is forced into deep sleep
3075 *
3076 * REVISIT we should probably reject suspend requests when there's a host
3077 * session active, rather than disconnecting, at least on boards that can
3078 * report VBUS irqs (UDC_DEVSTAT.UDC_ATT). And in any case, we need to
3079 * make host resumes and VBUS detection trigger OMAP wakeup events; that
3080 * may involve talking to an external transceiver (e.g. isp1301).
3081 */
3082
3083 static int omap_udc_suspend(struct platform_device *dev, pm_message_t message)
3084 {
3085 u32 devstat;
3086
3087 devstat = omap_readw(UDC_DEVSTAT);
3088
3089 /* we're requesting 48 MHz clock if the pullup is enabled
3090 * (== we're attached to the host) and we're not suspended,
3091 * which would prevent entry to deep sleep...
3092 */
3093 if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
3094 WARNING("session active; suspend requires disconnect\n");
3095 omap_pullup(&udc->gadget, 0);
3096 }
3097
3098 return 0;
3099 }
3100
3101 static int omap_udc_resume(struct platform_device *dev)
3102 {
3103 DBG("resume + wakeup/SRP\n");
3104 omap_pullup(&udc->gadget, 1);
3105
3106 /* maybe the host would enumerate us if we nudged it */
3107 msleep(100);
3108 return omap_wakeup(&udc->gadget);
3109 }
3110
3111 /*-------------------------------------------------------------------------*/
3112
3113 static struct platform_driver udc_driver = {
3114 .remove = __exit_p(omap_udc_remove),
3115 .suspend = omap_udc_suspend,
3116 .resume = omap_udc_resume,
3117 .driver = {
3118 .owner = THIS_MODULE,
3119 .name = (char *) driver_name,
3120 },
3121 };
3122
3123 static int __init udc_init(void)
3124 {
3125 /* Disable DMA for omap7xx -- it doesn't work right. */
3126 if (cpu_is_omap7xx())
3127 use_dma = 0;
3128
3129 INFO("%s, version: " DRIVER_VERSION
3130 #ifdef USE_ISO
3131 " (iso)"
3132 #endif
3133 "%s\n", driver_desc,
3134 use_dma ? " (dma)" : "");
3135 return platform_driver_probe(&udc_driver, omap_udc_probe);
3136 }
3137 module_init(udc_init);
3138
3139 static void __exit udc_exit(void)
3140 {
3141 platform_driver_unregister(&udc_driver);
3142 }
3143 module_exit(udc_exit);
3144
3145 MODULE_DESCRIPTION(DRIVER_DESC);
3146 MODULE_LICENSE("GPL");
3147 MODULE_ALIAS("platform:omap_udc");
Linux kernel - Deliverables
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