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Linux 4.2.1
[linux/fpc-iii.git] / drivers / usb / gadget / udc / mv_u3d_core.c
blobea35a248c8985fbc8ecc8b65fb4a02c1ab070738
1 /*
2 * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 */
8
9 #include <linux/module.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/dmapool.h>
12 #include <linux/kernel.h>
13 #include <linux/delay.h>
14 #include <linux/ioport.h>
15 #include <linux/sched.h>
16 #include <linux/slab.h>
17 #include <linux/errno.h>
18 #include <linux/timer.h>
19 #include <linux/list.h>
20 #include <linux/notifier.h>
21 #include <linux/interrupt.h>
22 #include <linux/moduleparam.h>
23 #include <linux/device.h>
24 #include <linux/usb/ch9.h>
25 #include <linux/usb/gadget.h>
26 #include <linux/pm.h>
27 #include <linux/io.h>
28 #include <linux/irq.h>
29 #include <linux/platform_device.h>
30 #include <linux/platform_data/mv_usb.h>
31 #include <linux/clk.h>
32
33 #include "mv_u3d.h"
34
35 #define DRIVER_DESC "Marvell PXA USB3.0 Device Controller driver"
36
37 static const char driver_name[] = "mv_u3d";
38 static const char driver_desc[] = DRIVER_DESC;
39
40 static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status);
41 static void mv_u3d_stop_activity(struct mv_u3d *u3d,
42 struct usb_gadget_driver *driver);
43
44 /* for endpoint 0 operations */
45 static const struct usb_endpoint_descriptor mv_u3d_ep0_desc = {
46 .bLength = USB_DT_ENDPOINT_SIZE,
47 .bDescriptorType = USB_DT_ENDPOINT,
48 .bEndpointAddress = 0,
49 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
50 .wMaxPacketSize = MV_U3D_EP0_MAX_PKT_SIZE,
51 };
52
53 static void mv_u3d_ep0_reset(struct mv_u3d *u3d)
54 {
55 struct mv_u3d_ep *ep;
56 u32 epxcr;
57 int i;
58
59 for (i = 0; i < 2; i++) {
60 ep = &u3d->eps[i];
61 ep->u3d = u3d;
62
63 /* ep0 ep context, ep0 in and out share the same ep context */
64 ep->ep_context = &u3d->ep_context[1];
65 }
66
67 /* reset ep state machine */
68 /* reset ep0 out */
69 epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
70 epxcr |= MV_U3D_EPXCR_EP_INIT;
71 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
72 udelay(5);
73 epxcr &= ~MV_U3D_EPXCR_EP_INIT;
74 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr0);
75
76 epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
77 << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
78 | (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
79 | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
80 | MV_U3D_EPXCR_EP_TYPE_CONTROL);
81 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxoutcr1);
82
83 /* reset ep0 in */
84 epxcr = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
85 epxcr |= MV_U3D_EPXCR_EP_INIT;
86 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
87 udelay(5);
88 epxcr &= ~MV_U3D_EPXCR_EP_INIT;
89 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr0);
90
91 epxcr = ((MV_U3D_EP0_MAX_PKT_SIZE
92 << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
93 | (1 << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
94 | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
95 | MV_U3D_EPXCR_EP_TYPE_CONTROL);
96 iowrite32(epxcr, &u3d->vuc_regs->epcr[0].epxincr1);
97 }
98
99 static void mv_u3d_ep0_stall(struct mv_u3d *u3d)
100 {
101 u32 tmp;
102 dev_dbg(u3d->dev, "%s\n", __func__);
103
104 /* set TX and RX to stall */
105 tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
106 tmp |= MV_U3D_EPXCR_EP_HALT;
107 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
108
109 tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
110 tmp |= MV_U3D_EPXCR_EP_HALT;
111 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
112
113 /* update ep0 state */
114 u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
115 u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
116 }
117
118 static int mv_u3d_process_ep_req(struct mv_u3d *u3d, int index,
119 struct mv_u3d_req *curr_req)
120 {
121 struct mv_u3d_trb *curr_trb;
122 dma_addr_t cur_deq_lo;
123 struct mv_u3d_ep_context *curr_ep_context;
124 int trb_complete, actual, remaining_length = 0;
125 int direction, ep_num;
126 int retval = 0;
127 u32 tmp, status, length;
128
129 curr_ep_context = &u3d->ep_context[index];
130 direction = index % 2;
131 ep_num = index / 2;
132
133 trb_complete = 0;
134 actual = curr_req->req.length;
135
136 while (!list_empty(&curr_req->trb_list)) {
137 curr_trb = list_entry(curr_req->trb_list.next,
138 struct mv_u3d_trb, trb_list);
139 if (!curr_trb->trb_hw->ctrl.own) {
140 dev_err(u3d->dev, "%s, TRB own error!\n",
141 u3d->eps[index].name);
142 return 1;
143 }
144
145 curr_trb->trb_hw->ctrl.own = 0;
146 if (direction == MV_U3D_EP_DIR_OUT) {
147 tmp = ioread32(&u3d->vuc_regs->rxst[ep_num].statuslo);
148 cur_deq_lo =
149 ioread32(&u3d->vuc_regs->rxst[ep_num].curdeqlo);
150 } else {
151 tmp = ioread32(&u3d->vuc_regs->txst[ep_num].statuslo);
152 cur_deq_lo =
153 ioread32(&u3d->vuc_regs->txst[ep_num].curdeqlo);
154 }
155
156 status = tmp >> MV_U3D_XFERSTATUS_COMPLETE_SHIFT;
157 length = tmp & MV_U3D_XFERSTATUS_TRB_LENGTH_MASK;
158
159 if (status == MV_U3D_COMPLETE_SUCCESS ||
160 (status == MV_U3D_COMPLETE_SHORT_PACKET &&
161 direction == MV_U3D_EP_DIR_OUT)) {
162 remaining_length += length;
163 actual -= remaining_length;
164 } else {
165 dev_err(u3d->dev,
166 "complete_tr error: ep=%d %s: error = 0x%x\n",
167 index >> 1, direction ? "SEND" : "RECV",
168 status);
169 retval = -EPROTO;
170 }
171
172 list_del_init(&curr_trb->trb_list);
173 }
174 if (retval)
175 return retval;
176
177 curr_req->req.actual = actual;
178 return 0;
179 }
180
181 /*
182 * mv_u3d_done() - retire a request; caller blocked irqs
183 * @status : request status to be set, only works when
184 * request is still in progress.
185 */
186 static
187 void mv_u3d_done(struct mv_u3d_ep *ep, struct mv_u3d_req *req, int status)
188 __releases(&ep->udc->lock)
189 __acquires(&ep->udc->lock)
190 {
191 struct mv_u3d *u3d = (struct mv_u3d *)ep->u3d;
192
193 dev_dbg(u3d->dev, "mv_u3d_done: remove req->queue\n");
194 /* Removed the req from ep queue */
195 list_del_init(&req->queue);
196
197 /* req.status should be set as -EINPROGRESS in ep_queue() */
198 if (req->req.status == -EINPROGRESS)
199 req->req.status = status;
200 else
201 status = req->req.status;
202
203 /* Free trb for the request */
204 if (!req->chain)
205 dma_pool_free(u3d->trb_pool,
206 req->trb_head->trb_hw, req->trb_head->trb_dma);
207 else {
208 dma_unmap_single(ep->u3d->gadget.dev.parent,
209 (dma_addr_t)req->trb_head->trb_dma,
210 req->trb_count * sizeof(struct mv_u3d_trb_hw),
211 DMA_BIDIRECTIONAL);
212 kfree(req->trb_head->trb_hw);
213 }
214 kfree(req->trb_head);
215
216 usb_gadget_unmap_request(&u3d->gadget, &req->req, mv_u3d_ep_dir(ep));
217
218 if (status && (status != -ESHUTDOWN)) {
219 dev_dbg(u3d->dev, "complete %s req %p stat %d len %u/%u",
220 ep->ep.name, &req->req, status,
221 req->req.actual, req->req.length);
222 }
223
224 spin_unlock(&ep->u3d->lock);
225
226 usb_gadget_giveback_request(&ep->ep, &req->req);
227
228 spin_lock(&ep->u3d->lock);
229 }
230
231 static int mv_u3d_queue_trb(struct mv_u3d_ep *ep, struct mv_u3d_req *req)
232 {
233 u32 tmp, direction;
234 struct mv_u3d *u3d;
235 struct mv_u3d_ep_context *ep_context;
236 int retval = 0;
237
238 u3d = ep->u3d;
239 direction = mv_u3d_ep_dir(ep);
240
241 /* ep0 in and out share the same ep context slot 1*/
242 if (ep->ep_num == 0)
243 ep_context = &(u3d->ep_context[1]);
244 else
245 ep_context = &(u3d->ep_context[ep->ep_num * 2 + direction]);
246
247 /* check if the pipe is empty or not */
248 if (!list_empty(&ep->queue)) {
249 dev_err(u3d->dev, "add trb to non-empty queue!\n");
250 retval = -ENOMEM;
251 WARN_ON(1);
252 } else {
253 ep_context->rsvd0 = cpu_to_le32(1);
254 ep_context->rsvd1 = 0;
255
256 /* Configure the trb address and set the DCS bit.
257 * Both DCS bit and own bit in trb should be set.
258 */
259 ep_context->trb_addr_lo =
260 cpu_to_le32(req->trb_head->trb_dma | DCS_ENABLE);
261 ep_context->trb_addr_hi = 0;
262
263 /* Ensure that updates to the EP Context will
264 * occure before Ring Bell.
265 */
266 wmb();
267
268 /* ring bell the ep */
269 if (ep->ep_num == 0)
270 tmp = 0x1;
271 else
272 tmp = ep->ep_num * 2
273 + ((direction == MV_U3D_EP_DIR_OUT) ? 0 : 1);
274
275 iowrite32(tmp, &u3d->op_regs->doorbell);
276 }
277 return retval;
278 }
279
280 static struct mv_u3d_trb *mv_u3d_build_trb_one(struct mv_u3d_req *req,
281 unsigned *length, dma_addr_t *dma)
282 {
283 u32 temp;
284 unsigned int direction;
285 struct mv_u3d_trb *trb;
286 struct mv_u3d_trb_hw *trb_hw;
287 struct mv_u3d *u3d;
288
289 /* how big will this transfer be? */
290 *length = req->req.length - req->req.actual;
291 BUG_ON(*length > (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
292
293 u3d = req->ep->u3d;
294
295 trb = kzalloc(sizeof(*trb), GFP_ATOMIC);
296 if (!trb)
297 return NULL;
298
299 /*
300 * Be careful that no _GFP_HIGHMEM is set,
301 * or we can not use dma_to_virt
302 * cannot use GFP_KERNEL in spin lock
303 */
304 trb_hw = dma_pool_alloc(u3d->trb_pool, GFP_ATOMIC, dma);
305 if (!trb_hw) {
306 kfree(trb);
307 dev_err(u3d->dev,
308 "%s, dma_pool_alloc fail\n", __func__);
309 return NULL;
310 }
311 trb->trb_dma = *dma;
312 trb->trb_hw = trb_hw;
313
314 /* initialize buffer page pointers */
315 temp = (u32)(req->req.dma + req->req.actual);
316
317 trb_hw->buf_addr_lo = cpu_to_le32(temp);
318 trb_hw->buf_addr_hi = 0;
319 trb_hw->trb_len = cpu_to_le32(*length);
320 trb_hw->ctrl.own = 1;
321
322 if (req->ep->ep_num == 0)
323 trb_hw->ctrl.type = TYPE_DATA;
324 else
325 trb_hw->ctrl.type = TYPE_NORMAL;
326
327 req->req.actual += *length;
328
329 direction = mv_u3d_ep_dir(req->ep);
330 if (direction == MV_U3D_EP_DIR_IN)
331 trb_hw->ctrl.dir = 1;
332 else
333 trb_hw->ctrl.dir = 0;
334
335 /* Enable interrupt for the last trb of a request */
336 if (!req->req.no_interrupt)
337 trb_hw->ctrl.ioc = 1;
338
339 trb_hw->ctrl.chain = 0;
340
341 wmb();
342 return trb;
343 }
344
345 static int mv_u3d_build_trb_chain(struct mv_u3d_req *req, unsigned *length,
346 struct mv_u3d_trb *trb, int *is_last)
347 {
348 u32 temp;
349 unsigned int direction;
350 struct mv_u3d *u3d;
351
352 /* how big will this transfer be? */
353 *length = min(req->req.length - req->req.actual,
354 (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER);
355
356 u3d = req->ep->u3d;
357
358 trb->trb_dma = 0;
359
360 /* initialize buffer page pointers */
361 temp = (u32)(req->req.dma + req->req.actual);
362
363 trb->trb_hw->buf_addr_lo = cpu_to_le32(temp);
364 trb->trb_hw->buf_addr_hi = 0;
365 trb->trb_hw->trb_len = cpu_to_le32(*length);
366 trb->trb_hw->ctrl.own = 1;
367
368 if (req->ep->ep_num == 0)
369 trb->trb_hw->ctrl.type = TYPE_DATA;
370 else
371 trb->trb_hw->ctrl.type = TYPE_NORMAL;
372
373 req->req.actual += *length;
374
375 direction = mv_u3d_ep_dir(req->ep);
376 if (direction == MV_U3D_EP_DIR_IN)
377 trb->trb_hw->ctrl.dir = 1;
378 else
379 trb->trb_hw->ctrl.dir = 0;
380
381 /* zlp is needed if req->req.zero is set */
382 if (req->req.zero) {
383 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
384 *is_last = 1;
385 else
386 *is_last = 0;
387 } else if (req->req.length == req->req.actual)
388 *is_last = 1;
389 else
390 *is_last = 0;
391
392 /* Enable interrupt for the last trb of a request */
393 if (*is_last && !req->req.no_interrupt)
394 trb->trb_hw->ctrl.ioc = 1;
395
396 if (*is_last)
397 trb->trb_hw->ctrl.chain = 0;
398 else {
399 trb->trb_hw->ctrl.chain = 1;
400 dev_dbg(u3d->dev, "chain trb\n");
401 }
402
403 wmb();
404
405 return 0;
406 }
407
408 /* generate TRB linked list for a request
409 * usb controller only supports continous trb chain,
410 * that trb structure physical address should be continous.
411 */
412 static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
413 {
414 unsigned count;
415 int is_last;
416 struct mv_u3d_trb *trb;
417 struct mv_u3d_trb_hw *trb_hw;
418 struct mv_u3d *u3d;
419 dma_addr_t dma;
420 unsigned length;
421 unsigned trb_num;
422
423 u3d = req->ep->u3d;
424
425 INIT_LIST_HEAD(&req->trb_list);
426
427 length = req->req.length - req->req.actual;
428 /* normally the request transfer length is less than 16KB.
429 * we use buil_trb_one() to optimize it.
430 */
431 if (length <= (unsigned)MV_U3D_EP_MAX_LENGTH_TRANSFER) {
432 trb = mv_u3d_build_trb_one(req, &count, &dma);
433 list_add_tail(&trb->trb_list, &req->trb_list);
434 req->trb_head = trb;
435 req->trb_count = 1;
436 req->chain = 0;
437 } else {
438 trb_num = length / MV_U3D_EP_MAX_LENGTH_TRANSFER;
439 if (length % MV_U3D_EP_MAX_LENGTH_TRANSFER)
440 trb_num++;
441
442 trb = kcalloc(trb_num, sizeof(*trb), GFP_ATOMIC);
443 if (!trb)
444 return -ENOMEM;
445
446 trb_hw = kcalloc(trb_num, sizeof(*trb_hw), GFP_ATOMIC);
447 if (!trb_hw) {
448 kfree(trb);
449 return -ENOMEM;
450 }
451
452 do {
453 trb->trb_hw = trb_hw;
454 if (mv_u3d_build_trb_chain(req, &count,
455 trb, &is_last)) {
456 dev_err(u3d->dev,
457 "%s, mv_u3d_build_trb_chain fail\n",
458 __func__);
459 return -EIO;
460 }
461
462 list_add_tail(&trb->trb_list, &req->trb_list);
463 req->trb_count++;
464 trb++;
465 trb_hw++;
466 } while (!is_last);
467
468 req->trb_head = list_entry(req->trb_list.next,
469 struct mv_u3d_trb, trb_list);
470 req->trb_head->trb_dma = dma_map_single(u3d->gadget.dev.parent,
471 req->trb_head->trb_hw,
472 trb_num * sizeof(*trb_hw),
473 DMA_BIDIRECTIONAL);
474
475 req->chain = 1;
476 }
477
478 return 0;
479 }
480
481 static int
482 mv_u3d_start_queue(struct mv_u3d_ep *ep)
483 {
484 struct mv_u3d *u3d = ep->u3d;
485 struct mv_u3d_req *req;
486 int ret;
487
488 if (!list_empty(&ep->req_list) && !ep->processing)
489 req = list_entry(ep->req_list.next, struct mv_u3d_req, list);
490 else
491 return 0;
492
493 ep->processing = 1;
494
495 /* set up dma mapping */
496 ret = usb_gadget_map_request(&u3d->gadget, &req->req,
497 mv_u3d_ep_dir(ep));
498 if (ret)
499 return ret;
500
501 req->req.status = -EINPROGRESS;
502 req->req.actual = 0;
503 req->trb_count = 0;
504
505 /* build trbs and push them to device queue */
506 if (!mv_u3d_req_to_trb(req)) {
507 ret = mv_u3d_queue_trb(ep, req);
508 if (ret) {
509 ep->processing = 0;
510 return ret;
511 }
512 } else {
513 ep->processing = 0;
514 dev_err(u3d->dev, "%s, mv_u3d_req_to_trb fail\n", __func__);
515 return -ENOMEM;
516 }
517
518 /* irq handler advances the queue */
519 if (req)
520 list_add_tail(&req->queue, &ep->queue);
521
522 return 0;
523 }
524
525 static int mv_u3d_ep_enable(struct usb_ep *_ep,
526 const struct usb_endpoint_descriptor *desc)
527 {
528 struct mv_u3d *u3d;
529 struct mv_u3d_ep *ep;
530 struct mv_u3d_ep_context *ep_context;
531 u16 max = 0;
532 unsigned maxburst = 0;
533 u32 epxcr, direction;
534
535 if (!_ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT)
536 return -EINVAL;
537
538 ep = container_of(_ep, struct mv_u3d_ep, ep);
539 u3d = ep->u3d;
540
541 if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN)
542 return -ESHUTDOWN;
543
544 direction = mv_u3d_ep_dir(ep);
545 max = le16_to_cpu(desc->wMaxPacketSize);
546
547 if (!_ep->maxburst)
548 _ep->maxburst = 1;
549 maxburst = _ep->maxburst;
550
551 /* Get the endpoint context address */
552 ep_context = (struct mv_u3d_ep_context *)ep->ep_context;
553
554 /* Set the max burst size */
555 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
556 case USB_ENDPOINT_XFER_BULK:
557 if (maxburst > 16) {
558 dev_dbg(u3d->dev,
559 "max burst should not be greater "
560 "than 16 on bulk ep\n");
561 maxburst = 1;
562 _ep->maxburst = maxburst;
563 }
564 dev_dbg(u3d->dev,
565 "maxburst: %d on bulk %s\n", maxburst, ep->name);
566 break;
567 case USB_ENDPOINT_XFER_CONTROL:
568 /* control transfer only supports maxburst as one */
569 maxburst = 1;
570 _ep->maxburst = maxburst;
571 break;
572 case USB_ENDPOINT_XFER_INT:
573 if (maxburst != 1) {
574 dev_dbg(u3d->dev,
575 "max burst should be 1 on int ep "
576 "if transfer size is not 1024\n");
577 maxburst = 1;
578 _ep->maxburst = maxburst;
579 }
580 break;
581 case USB_ENDPOINT_XFER_ISOC:
582 if (maxburst != 1) {
583 dev_dbg(u3d->dev,
584 "max burst should be 1 on isoc ep "
585 "if transfer size is not 1024\n");
586 maxburst = 1;
587 _ep->maxburst = maxburst;
588 }
589 break;
590 default:
591 goto en_done;
592 }
593
594 ep->ep.maxpacket = max;
595 ep->ep.desc = desc;
596 ep->enabled = 1;
597
598 /* Enable the endpoint for Rx or Tx and set the endpoint type */
599 if (direction == MV_U3D_EP_DIR_OUT) {
600 epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
601 epxcr |= MV_U3D_EPXCR_EP_INIT;
602 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
603 udelay(5);
604 epxcr &= ~MV_U3D_EPXCR_EP_INIT;
605 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
606
607 epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
608 | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
609 | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
610 | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
611 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
612 } else {
613 epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
614 epxcr |= MV_U3D_EPXCR_EP_INIT;
615 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
616 udelay(5);
617 epxcr &= ~MV_U3D_EPXCR_EP_INIT;
618 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
619
620 epxcr = ((max << MV_U3D_EPXCR_MAX_PACKET_SIZE_SHIFT)
621 | ((maxburst - 1) << MV_U3D_EPXCR_MAX_BURST_SIZE_SHIFT)
622 | (1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
623 | (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK));
624 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
625 }
626
627 return 0;
628 en_done:
629 return -EINVAL;
630 }
631
632 static int mv_u3d_ep_disable(struct usb_ep *_ep)
633 {
634 struct mv_u3d *u3d;
635 struct mv_u3d_ep *ep;
636 struct mv_u3d_ep_context *ep_context;
637 u32 epxcr, direction;
638 unsigned long flags;
639
640 if (!_ep)
641 return -EINVAL;
642
643 ep = container_of(_ep, struct mv_u3d_ep, ep);
644 if (!ep->ep.desc)
645 return -EINVAL;
646
647 u3d = ep->u3d;
648
649 /* Get the endpoint context address */
650 ep_context = ep->ep_context;
651
652 direction = mv_u3d_ep_dir(ep);
653
654 /* nuke all pending requests (does flush) */
655 spin_lock_irqsave(&u3d->lock, flags);
656 mv_u3d_nuke(ep, -ESHUTDOWN);
657 spin_unlock_irqrestore(&u3d->lock, flags);
658
659 /* Disable the endpoint for Rx or Tx and reset the endpoint type */
660 if (direction == MV_U3D_EP_DIR_OUT) {
661 epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
662 epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
663 | USB_ENDPOINT_XFERTYPE_MASK);
664 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr1);
665 } else {
666 epxcr = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
667 epxcr &= ~((1 << MV_U3D_EPXCR_EP_ENABLE_SHIFT)
668 | USB_ENDPOINT_XFERTYPE_MASK);
669 iowrite32(epxcr, &u3d->vuc_regs->epcr[ep->ep_num].epxincr1);
670 }
671
672 ep->enabled = 0;
673
674 ep->ep.desc = NULL;
675 return 0;
676 }
677
678 static struct usb_request *
679 mv_u3d_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
680 {
681 struct mv_u3d_req *req = NULL;
682
683 req = kzalloc(sizeof *req, gfp_flags);
684 if (!req)
685 return NULL;
686
687 INIT_LIST_HEAD(&req->queue);
688
689 return &req->req;
690 }
691
692 static void mv_u3d_free_request(struct usb_ep *_ep, struct usb_request *_req)
693 {
694 struct mv_u3d_req *req = container_of(_req, struct mv_u3d_req, req);
695
696 kfree(req);
697 }
698
699 static void mv_u3d_ep_fifo_flush(struct usb_ep *_ep)
700 {
701 struct mv_u3d *u3d;
702 u32 direction;
703 struct mv_u3d_ep *ep = container_of(_ep, struct mv_u3d_ep, ep);
704 unsigned int loops;
705 u32 tmp;
706
707 /* if endpoint is not enabled, cannot flush endpoint */
708 if (!ep->enabled)
709 return;
710
711 u3d = ep->u3d;
712 direction = mv_u3d_ep_dir(ep);
713
714 /* ep0 need clear bit after flushing fifo. */
715 if (!ep->ep_num) {
716 if (direction == MV_U3D_EP_DIR_OUT) {
717 tmp = ioread32(&u3d->vuc_regs->epcr[0].epxoutcr0);
718 tmp |= MV_U3D_EPXCR_EP_FLUSH;
719 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
720 udelay(10);
721 tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
722 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxoutcr0);
723 } else {
724 tmp = ioread32(&u3d->vuc_regs->epcr[0].epxincr0);
725 tmp |= MV_U3D_EPXCR_EP_FLUSH;
726 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
727 udelay(10);
728 tmp &= ~MV_U3D_EPXCR_EP_FLUSH;
729 iowrite32(tmp, &u3d->vuc_regs->epcr[0].epxincr0);
730 }
731 return;
732 }
733
734 if (direction == MV_U3D_EP_DIR_OUT) {
735 tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
736 tmp |= MV_U3D_EPXCR_EP_FLUSH;
737 iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
738
739 /* Wait until flushing completed */
740 loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
741 while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0) &
742 MV_U3D_EPXCR_EP_FLUSH) {
743 /*
744 * EP_FLUSH bit should be cleared to indicate this
745 * operation is complete
746 */
747 if (loops == 0) {
748 dev_dbg(u3d->dev,
749 "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
750 direction ? "in" : "out");
751 return;
752 }
753 loops--;
754 udelay(LOOPS_USEC);
755 }
756 } else { /* EP_DIR_IN */
757 tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
758 tmp |= MV_U3D_EPXCR_EP_FLUSH;
759 iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
760
761 /* Wait until flushing completed */
762 loops = LOOPS(MV_U3D_FLUSH_TIMEOUT);
763 while (ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0) &
764 MV_U3D_EPXCR_EP_FLUSH) {
765 /*
766 * EP_FLUSH bit should be cleared to indicate this
767 * operation is complete
768 */
769 if (loops == 0) {
770 dev_dbg(u3d->dev,
771 "EP FLUSH TIMEOUT for ep%d%s\n", ep->ep_num,
772 direction ? "in" : "out");
773 return;
774 }
775 loops--;
776 udelay(LOOPS_USEC);
777 }
778 }
779 }
780
781 /* queues (submits) an I/O request to an endpoint */
782 static int
783 mv_u3d_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
784 {
785 struct mv_u3d_ep *ep;
786 struct mv_u3d_req *req;
787 struct mv_u3d *u3d;
788 unsigned long flags;
789 int is_first_req = 0;
790
791 if (unlikely(!_ep || !_req))
792 return -EINVAL;
793
794 ep = container_of(_ep, struct mv_u3d_ep, ep);
795 u3d = ep->u3d;
796
797 req = container_of(_req, struct mv_u3d_req, req);
798
799 if (!ep->ep_num
800 && u3d->ep0_state == MV_U3D_STATUS_STAGE
801 && !_req->length) {
802 dev_dbg(u3d->dev, "ep0 status stage\n");
803 u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
804 return 0;
805 }
806
807 dev_dbg(u3d->dev, "%s: %s, req: 0x%p\n",
808 __func__, _ep->name, req);
809
810 /* catch various bogus parameters */
811 if (!req->req.complete || !req->req.buf
812 || !list_empty(&req->queue)) {
813 dev_err(u3d->dev,
814 "%s, bad params, _req: 0x%p,"
815 "req->req.complete: 0x%p, req->req.buf: 0x%p,"
816 "list_empty: 0x%x\n",
817 __func__, _req,
818 req->req.complete, req->req.buf,
819 list_empty(&req->queue));
820 return -EINVAL;
821 }
822 if (unlikely(!ep->ep.desc)) {
823 dev_err(u3d->dev, "%s, bad ep\n", __func__);
824 return -EINVAL;
825 }
826 if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
827 if (req->req.length > ep->ep.maxpacket)
828 return -EMSGSIZE;
829 }
830
831 if (!u3d->driver || u3d->gadget.speed == USB_SPEED_UNKNOWN) {
832 dev_err(u3d->dev,
833 "bad params of driver/speed\n");
834 return -ESHUTDOWN;
835 }
836
837 req->ep = ep;
838
839 /* Software list handles usb request. */
840 spin_lock_irqsave(&ep->req_lock, flags);
841 is_first_req = list_empty(&ep->req_list);
842 list_add_tail(&req->list, &ep->req_list);
843 spin_unlock_irqrestore(&ep->req_lock, flags);
844 if (!is_first_req) {
845 dev_dbg(u3d->dev, "list is not empty\n");
846 return 0;
847 }
848
849 dev_dbg(u3d->dev, "call mv_u3d_start_queue from usb_ep_queue\n");
850 spin_lock_irqsave(&u3d->lock, flags);
851 mv_u3d_start_queue(ep);
852 spin_unlock_irqrestore(&u3d->lock, flags);
853 return 0;
854 }
855
856 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
857 static int mv_u3d_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
858 {
859 struct mv_u3d_ep *ep;
860 struct mv_u3d_req *req;
861 struct mv_u3d *u3d;
862 struct mv_u3d_ep_context *ep_context;
863 struct mv_u3d_req *next_req;
864
865 unsigned long flags;
866 int ret = 0;
867
868 if (!_ep || !_req)
869 return -EINVAL;
870
871 ep = container_of(_ep, struct mv_u3d_ep, ep);
872 u3d = ep->u3d;
873
874 spin_lock_irqsave(&ep->u3d->lock, flags);
875
876 /* make sure it's actually queued on this endpoint */
877 list_for_each_entry(req, &ep->queue, queue) {
878 if (&req->req == _req)
879 break;
880 }
881 if (&req->req != _req) {
882 ret = -EINVAL;
883 goto out;
884 }
885
886 /* The request is in progress, or completed but not dequeued */
887 if (ep->queue.next == &req->queue) {
888 _req->status = -ECONNRESET;
889 mv_u3d_ep_fifo_flush(_ep);
890
891 /* The request isn't the last request in this ep queue */
892 if (req->queue.next != &ep->queue) {
893 dev_dbg(u3d->dev,
894 "it is the last request in this ep queue\n");
895 ep_context = ep->ep_context;
896 next_req = list_entry(req->queue.next,
897 struct mv_u3d_req, queue);
898
899 /* Point first TRB of next request to the EP context. */
900 iowrite32((unsigned long) next_req->trb_head,
901 &ep_context->trb_addr_lo);
902 } else {
903 struct mv_u3d_ep_context *ep_context;
904 ep_context = ep->ep_context;
905 ep_context->trb_addr_lo = 0;
906 ep_context->trb_addr_hi = 0;
907 }
908
909 } else
910 WARN_ON(1);
911
912 mv_u3d_done(ep, req, -ECONNRESET);
913
914 /* remove the req from the ep req list */
915 if (!list_empty(&ep->req_list)) {
916 struct mv_u3d_req *curr_req;
917 curr_req = list_entry(ep->req_list.next,
918 struct mv_u3d_req, list);
919 if (curr_req == req) {
920 list_del_init(&req->list);
921 ep->processing = 0;
922 }
923 }
924
925 out:
926 spin_unlock_irqrestore(&ep->u3d->lock, flags);
927 return ret;
928 }
929
930 static void
931 mv_u3d_ep_set_stall(struct mv_u3d *u3d, u8 ep_num, u8 direction, int stall)
932 {
933 u32 tmp;
934 struct mv_u3d_ep *ep = u3d->eps;
935
936 dev_dbg(u3d->dev, "%s\n", __func__);
937 if (direction == MV_U3D_EP_DIR_OUT) {
938 tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
939 if (stall)
940 tmp |= MV_U3D_EPXCR_EP_HALT;
941 else
942 tmp &= ~MV_U3D_EPXCR_EP_HALT;
943 iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxoutcr0);
944 } else {
945 tmp = ioread32(&u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
946 if (stall)
947 tmp |= MV_U3D_EPXCR_EP_HALT;
948 else
949 tmp &= ~MV_U3D_EPXCR_EP_HALT;
950 iowrite32(tmp, &u3d->vuc_regs->epcr[ep->ep_num].epxincr0);
951 }
952 }
953
954 static int mv_u3d_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge)
955 {
956 struct mv_u3d_ep *ep;
957 unsigned long flags = 0;
958 int status = 0;
959 struct mv_u3d *u3d;
960
961 ep = container_of(_ep, struct mv_u3d_ep, ep);
962 u3d = ep->u3d;
963 if (!ep->ep.desc) {
964 status = -EINVAL;
965 goto out;
966 }
967
968 if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
969 status = -EOPNOTSUPP;
970 goto out;
971 }
972
973 /*
974 * Attempt to halt IN ep will fail if any transfer requests
975 * are still queue
976 */
977 if (halt && (mv_u3d_ep_dir(ep) == MV_U3D_EP_DIR_IN)
978 && !list_empty(&ep->queue)) {
979 status = -EAGAIN;
980 goto out;
981 }
982
983 spin_lock_irqsave(&ep->u3d->lock, flags);
984 mv_u3d_ep_set_stall(u3d, ep->ep_num, mv_u3d_ep_dir(ep), halt);
985 if (halt && wedge)
986 ep->wedge = 1;
987 else if (!halt)
988 ep->wedge = 0;
989 spin_unlock_irqrestore(&ep->u3d->lock, flags);
990
991 if (ep->ep_num == 0)
992 u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
993 out:
994 return status;
995 }
996
997 static int mv_u3d_ep_set_halt(struct usb_ep *_ep, int halt)
998 {
999 return mv_u3d_ep_set_halt_wedge(_ep, halt, 0);
1000 }
1001
1002 static int mv_u3d_ep_set_wedge(struct usb_ep *_ep)
1003 {
1004 return mv_u3d_ep_set_halt_wedge(_ep, 1, 1);
1005 }
1006
1007 static struct usb_ep_ops mv_u3d_ep_ops = {
1008 .enable = mv_u3d_ep_enable,
1009 .disable = mv_u3d_ep_disable,
1010
1011 .alloc_request = mv_u3d_alloc_request,
1012 .free_request = mv_u3d_free_request,
1013
1014 .queue = mv_u3d_ep_queue,
1015 .dequeue = mv_u3d_ep_dequeue,
1016
1017 .set_wedge = mv_u3d_ep_set_wedge,
1018 .set_halt = mv_u3d_ep_set_halt,
1019 .fifo_flush = mv_u3d_ep_fifo_flush,
1020 };
1021
1022 static void mv_u3d_controller_stop(struct mv_u3d *u3d)
1023 {
1024 u32 tmp;
1025
1026 if (!u3d->clock_gating && u3d->vbus_valid_detect)
1027 iowrite32(MV_U3D_INTR_ENABLE_VBUS_VALID,
1028 &u3d->vuc_regs->intrenable);
1029 else
1030 iowrite32(0, &u3d->vuc_regs->intrenable);
1031 iowrite32(~0x0, &u3d->vuc_regs->endcomplete);
1032 iowrite32(~0x0, &u3d->vuc_regs->trbunderrun);
1033 iowrite32(~0x0, &u3d->vuc_regs->trbcomplete);
1034 iowrite32(~0x0, &u3d->vuc_regs->linkchange);
1035 iowrite32(0x1, &u3d->vuc_regs->setuplock);
1036
1037 /* Reset the RUN bit in the command register to stop USB */
1038 tmp = ioread32(&u3d->op_regs->usbcmd);
1039 tmp &= ~MV_U3D_CMD_RUN_STOP;
1040 iowrite32(tmp, &u3d->op_regs->usbcmd);
1041 dev_dbg(u3d->dev, "after u3d_stop, USBCMD 0x%x\n",
1042 ioread32(&u3d->op_regs->usbcmd));
1043 }
1044
1045 static void mv_u3d_controller_start(struct mv_u3d *u3d)
1046 {
1047 u32 usbintr;
1048 u32 temp;
1049
1050 /* enable link LTSSM state machine */
1051 temp = ioread32(&u3d->vuc_regs->ltssm);
1052 temp |= MV_U3D_LTSSM_PHY_INIT_DONE;
1053 iowrite32(temp, &u3d->vuc_regs->ltssm);
1054
1055 /* Enable interrupts */
1056 usbintr = MV_U3D_INTR_ENABLE_LINK_CHG | MV_U3D_INTR_ENABLE_TXDESC_ERR |
1057 MV_U3D_INTR_ENABLE_RXDESC_ERR | MV_U3D_INTR_ENABLE_TX_COMPLETE |
1058 MV_U3D_INTR_ENABLE_RX_COMPLETE | MV_U3D_INTR_ENABLE_SETUP |
1059 (u3d->vbus_valid_detect ? MV_U3D_INTR_ENABLE_VBUS_VALID : 0);
1060 iowrite32(usbintr, &u3d->vuc_regs->intrenable);
1061
1062 /* Enable ctrl ep */
1063 iowrite32(0x1, &u3d->vuc_regs->ctrlepenable);
1064
1065 /* Set the Run bit in the command register */
1066 iowrite32(MV_U3D_CMD_RUN_STOP, &u3d->op_regs->usbcmd);
1067 dev_dbg(u3d->dev, "after u3d_start, USBCMD 0x%x\n",
1068 ioread32(&u3d->op_regs->usbcmd));
1069 }
1070
1071 static int mv_u3d_controller_reset(struct mv_u3d *u3d)
1072 {
1073 unsigned int loops;
1074 u32 tmp;
1075
1076 /* Stop the controller */
1077 tmp = ioread32(&u3d->op_regs->usbcmd);
1078 tmp &= ~MV_U3D_CMD_RUN_STOP;
1079 iowrite32(tmp, &u3d->op_regs->usbcmd);
1080
1081 /* Reset the controller to get default values */
1082 iowrite32(MV_U3D_CMD_CTRL_RESET, &u3d->op_regs->usbcmd);
1083
1084 /* wait for reset to complete */
1085 loops = LOOPS(MV_U3D_RESET_TIMEOUT);
1086 while (ioread32(&u3d->op_regs->usbcmd) & MV_U3D_CMD_CTRL_RESET) {
1087 if (loops == 0) {
1088 dev_err(u3d->dev,
1089 "Wait for RESET completed TIMEOUT\n");
1090 return -ETIMEDOUT;
1091 }
1092 loops--;
1093 udelay(LOOPS_USEC);
1094 }
1095
1096 /* Configure the Endpoint Context Address */
1097 iowrite32(u3d->ep_context_dma, &u3d->op_regs->dcbaapl);
1098 iowrite32(0, &u3d->op_regs->dcbaaph);
1099
1100 return 0;
1101 }
1102
1103 static int mv_u3d_enable(struct mv_u3d *u3d)
1104 {
1105 struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
1106 int retval;
1107
1108 if (u3d->active)
1109 return 0;
1110
1111 if (!u3d->clock_gating) {
1112 u3d->active = 1;
1113 return 0;
1114 }
1115
1116 dev_dbg(u3d->dev, "enable u3d\n");
1117 clk_enable(u3d->clk);
1118 if (pdata->phy_init) {
1119 retval = pdata->phy_init(u3d->phy_regs);
1120 if (retval) {
1121 dev_err(u3d->dev,
1122 "init phy error %d\n", retval);
1123 clk_disable(u3d->clk);
1124 return retval;
1125 }
1126 }
1127 u3d->active = 1;
1128
1129 return 0;
1130 }
1131
1132 static void mv_u3d_disable(struct mv_u3d *u3d)
1133 {
1134 struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
1135 if (u3d->clock_gating && u3d->active) {
1136 dev_dbg(u3d->dev, "disable u3d\n");
1137 if (pdata->phy_deinit)
1138 pdata->phy_deinit(u3d->phy_regs);
1139 clk_disable(u3d->clk);
1140 u3d->active = 0;
1141 }
1142 }
1143
1144 static int mv_u3d_vbus_session(struct usb_gadget *gadget, int is_active)
1145 {
1146 struct mv_u3d *u3d;
1147 unsigned long flags;
1148 int retval = 0;
1149
1150 u3d = container_of(gadget, struct mv_u3d, gadget);
1151
1152 spin_lock_irqsave(&u3d->lock, flags);
1153
1154 u3d->vbus_active = (is_active != 0);
1155 dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
1156 __func__, u3d->softconnect, u3d->vbus_active);
1157 /*
1158 * 1. external VBUS detect: we can disable/enable clock on demand.
1159 * 2. UDC VBUS detect: we have to enable clock all the time.
1160 * 3. No VBUS detect: we have to enable clock all the time.
1161 */
1162 if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
1163 retval = mv_u3d_enable(u3d);
1164 if (retval == 0) {
1165 /*
1166 * after clock is disabled, we lost all the register
1167 * context. We have to re-init registers
1168 */
1169 mv_u3d_controller_reset(u3d);
1170 mv_u3d_ep0_reset(u3d);
1171 mv_u3d_controller_start(u3d);
1172 }
1173 } else if (u3d->driver && u3d->softconnect) {
1174 if (!u3d->active)
1175 goto out;
1176
1177 /* stop all the transfer in queue*/
1178 mv_u3d_stop_activity(u3d, u3d->driver);
1179 mv_u3d_controller_stop(u3d);
1180 mv_u3d_disable(u3d);
1181 }
1182
1183 out:
1184 spin_unlock_irqrestore(&u3d->lock, flags);
1185 return retval;
1186 }
1187
1188 /* constrain controller's VBUS power usage
1189 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1190 * reporting how much power the device may consume. For example, this
1191 * could affect how quickly batteries are recharged.
1192 *
1193 * Returns zero on success, else negative errno.
1194 */
1195 static int mv_u3d_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1196 {
1197 struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
1198
1199 u3d->power = mA;
1200
1201 return 0;
1202 }
1203
1204 static int mv_u3d_pullup(struct usb_gadget *gadget, int is_on)
1205 {
1206 struct mv_u3d *u3d = container_of(gadget, struct mv_u3d, gadget);
1207 unsigned long flags;
1208 int retval = 0;
1209
1210 spin_lock_irqsave(&u3d->lock, flags);
1211
1212 dev_dbg(u3d->dev, "%s: softconnect %d, vbus_active %d\n",
1213 __func__, u3d->softconnect, u3d->vbus_active);
1214 u3d->softconnect = (is_on != 0);
1215 if (u3d->driver && u3d->softconnect && u3d->vbus_active) {
1216 retval = mv_u3d_enable(u3d);
1217 if (retval == 0) {
1218 /*
1219 * after clock is disabled, we lost all the register
1220 * context. We have to re-init registers
1221 */
1222 mv_u3d_controller_reset(u3d);
1223 mv_u3d_ep0_reset(u3d);
1224 mv_u3d_controller_start(u3d);
1225 }
1226 } else if (u3d->driver && u3d->vbus_active) {
1227 /* stop all the transfer in queue*/
1228 mv_u3d_stop_activity(u3d, u3d->driver);
1229 mv_u3d_controller_stop(u3d);
1230 mv_u3d_disable(u3d);
1231 }
1232
1233 spin_unlock_irqrestore(&u3d->lock, flags);
1234
1235 return retval;
1236 }
1237
1238 static int mv_u3d_start(struct usb_gadget *g,
1239 struct usb_gadget_driver *driver)
1240 {
1241 struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
1242 struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
1243 unsigned long flags;
1244
1245 if (u3d->driver)
1246 return -EBUSY;
1247
1248 spin_lock_irqsave(&u3d->lock, flags);
1249
1250 if (!u3d->clock_gating) {
1251 clk_enable(u3d->clk);
1252 if (pdata->phy_init)
1253 pdata->phy_init(u3d->phy_regs);
1254 }
1255
1256 /* hook up the driver ... */
1257 driver->driver.bus = NULL;
1258 u3d->driver = driver;
1259
1260 u3d->ep0_dir = USB_DIR_OUT;
1261
1262 spin_unlock_irqrestore(&u3d->lock, flags);
1263
1264 u3d->vbus_valid_detect = 1;
1265
1266 return 0;
1267 }
1268
1269 static int mv_u3d_stop(struct usb_gadget *g)
1270 {
1271 struct mv_u3d *u3d = container_of(g, struct mv_u3d, gadget);
1272 struct mv_usb_platform_data *pdata = dev_get_platdata(u3d->dev);
1273 unsigned long flags;
1274
1275 u3d->vbus_valid_detect = 0;
1276 spin_lock_irqsave(&u3d->lock, flags);
1277
1278 /* enable clock to access controller register */
1279 clk_enable(u3d->clk);
1280 if (pdata->phy_init)
1281 pdata->phy_init(u3d->phy_regs);
1282
1283 mv_u3d_controller_stop(u3d);
1284 /* stop all usb activities */
1285 u3d->gadget.speed = USB_SPEED_UNKNOWN;
1286 mv_u3d_stop_activity(u3d, NULL);
1287 mv_u3d_disable(u3d);
1288
1289 if (pdata->phy_deinit)
1290 pdata->phy_deinit(u3d->phy_regs);
1291 clk_disable(u3d->clk);
1292
1293 spin_unlock_irqrestore(&u3d->lock, flags);
1294
1295 u3d->driver = NULL;
1296
1297 return 0;
1298 }
1299
1300 /* device controller usb_gadget_ops structure */
1301 static const struct usb_gadget_ops mv_u3d_ops = {
1302 /* notify controller that VBUS is powered or not */
1303 .vbus_session = mv_u3d_vbus_session,
1304
1305 /* constrain controller's VBUS power usage */
1306 .vbus_draw = mv_u3d_vbus_draw,
1307
1308 .pullup = mv_u3d_pullup,
1309 .udc_start = mv_u3d_start,
1310 .udc_stop = mv_u3d_stop,
1311 };
1312
1313 static int mv_u3d_eps_init(struct mv_u3d *u3d)
1314 {
1315 struct mv_u3d_ep *ep;
1316 char name[14];
1317 int i;
1318
1319 /* initialize ep0, ep0 in/out use eps[1] */
1320 ep = &u3d->eps[1];
1321 ep->u3d = u3d;
1322 strncpy(ep->name, "ep0", sizeof(ep->name));
1323 ep->ep.name = ep->name;
1324 ep->ep.ops = &mv_u3d_ep_ops;
1325 ep->wedge = 0;
1326 usb_ep_set_maxpacket_limit(&ep->ep, MV_U3D_EP0_MAX_PKT_SIZE);
1327 ep->ep_num = 0;
1328 ep->ep.desc = &mv_u3d_ep0_desc;
1329 INIT_LIST_HEAD(&ep->queue);
1330 INIT_LIST_HEAD(&ep->req_list);
1331 ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
1332
1333 /* add ep0 ep_context */
1334 ep->ep_context = &u3d->ep_context[1];
1335
1336 /* initialize other endpoints */
1337 for (i = 2; i < u3d->max_eps * 2; i++) {
1338 ep = &u3d->eps[i];
1339 if (i & 1) {
1340 snprintf(name, sizeof(name), "ep%din", i >> 1);
1341 ep->direction = MV_U3D_EP_DIR_IN;
1342 } else {
1343 snprintf(name, sizeof(name), "ep%dout", i >> 1);
1344 ep->direction = MV_U3D_EP_DIR_OUT;
1345 }
1346 ep->u3d = u3d;
1347 strncpy(ep->name, name, sizeof(ep->name));
1348 ep->ep.name = ep->name;
1349
1350 ep->ep.ops = &mv_u3d_ep_ops;
1351 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
1352 ep->ep_num = i / 2;
1353
1354 INIT_LIST_HEAD(&ep->queue);
1355 list_add_tail(&ep->ep.ep_list, &u3d->gadget.ep_list);
1356
1357 INIT_LIST_HEAD(&ep->req_list);
1358 spin_lock_init(&ep->req_lock);
1359 ep->ep_context = &u3d->ep_context[i];
1360 }
1361
1362 return 0;
1363 }
1364
1365 /* delete all endpoint requests, called with spinlock held */
1366 static void mv_u3d_nuke(struct mv_u3d_ep *ep, int status)
1367 {
1368 /* endpoint fifo flush */
1369 mv_u3d_ep_fifo_flush(&ep->ep);
1370
1371 while (!list_empty(&ep->queue)) {
1372 struct mv_u3d_req *req = NULL;
1373 req = list_entry(ep->queue.next, struct mv_u3d_req, queue);
1374 mv_u3d_done(ep, req, status);
1375 }
1376 }
1377
1378 /* stop all USB activities */
1379 static
1380 void mv_u3d_stop_activity(struct mv_u3d *u3d, struct usb_gadget_driver *driver)
1381 {
1382 struct mv_u3d_ep *ep;
1383
1384 mv_u3d_nuke(&u3d->eps[1], -ESHUTDOWN);
1385
1386 list_for_each_entry(ep, &u3d->gadget.ep_list, ep.ep_list) {
1387 mv_u3d_nuke(ep, -ESHUTDOWN);
1388 }
1389
1390 /* report disconnect; the driver is already quiesced */
1391 if (driver) {
1392 spin_unlock(&u3d->lock);
1393 driver->disconnect(&u3d->gadget);
1394 spin_lock(&u3d->lock);
1395 }
1396 }
1397
1398 static void mv_u3d_irq_process_error(struct mv_u3d *u3d)
1399 {
1400 /* Increment the error count */
1401 u3d->errors++;
1402 dev_err(u3d->dev, "%s\n", __func__);
1403 }
1404
1405 static void mv_u3d_irq_process_link_change(struct mv_u3d *u3d)
1406 {
1407 u32 linkchange;
1408
1409 linkchange = ioread32(&u3d->vuc_regs->linkchange);
1410 iowrite32(linkchange, &u3d->vuc_regs->linkchange);
1411
1412 dev_dbg(u3d->dev, "linkchange: 0x%x\n", linkchange);
1413
1414 if (linkchange & MV_U3D_LINK_CHANGE_LINK_UP) {
1415 dev_dbg(u3d->dev, "link up: ltssm state: 0x%x\n",
1416 ioread32(&u3d->vuc_regs->ltssmstate));
1417
1418 u3d->usb_state = USB_STATE_DEFAULT;
1419 u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
1420 u3d->ep0_state = MV_U3D_WAIT_FOR_SETUP;
1421
1422 /* set speed */
1423 u3d->gadget.speed = USB_SPEED_SUPER;
1424 }
1425
1426 if (linkchange & MV_U3D_LINK_CHANGE_SUSPEND) {
1427 dev_dbg(u3d->dev, "link suspend\n");
1428 u3d->resume_state = u3d->usb_state;
1429 u3d->usb_state = USB_STATE_SUSPENDED;
1430 }
1431
1432 if (linkchange & MV_U3D_LINK_CHANGE_RESUME) {
1433 dev_dbg(u3d->dev, "link resume\n");
1434 u3d->usb_state = u3d->resume_state;
1435 u3d->resume_state = 0;
1436 }
1437
1438 if (linkchange & MV_U3D_LINK_CHANGE_WRESET) {
1439 dev_dbg(u3d->dev, "warm reset\n");
1440 u3d->usb_state = USB_STATE_POWERED;
1441 }
1442
1443 if (linkchange & MV_U3D_LINK_CHANGE_HRESET) {
1444 dev_dbg(u3d->dev, "hot reset\n");
1445 u3d->usb_state = USB_STATE_DEFAULT;
1446 }
1447
1448 if (linkchange & MV_U3D_LINK_CHANGE_INACT)
1449 dev_dbg(u3d->dev, "inactive\n");
1450
1451 if (linkchange & MV_U3D_LINK_CHANGE_DISABLE_AFTER_U0)
1452 dev_dbg(u3d->dev, "ss.disabled\n");
1453
1454 if (linkchange & MV_U3D_LINK_CHANGE_VBUS_INVALID) {
1455 dev_dbg(u3d->dev, "vbus invalid\n");
1456 u3d->usb_state = USB_STATE_ATTACHED;
1457 u3d->vbus_valid_detect = 1;
1458 /* if external vbus detect is not supported,
1459 * we handle it here.
1460 */
1461 if (!u3d->vbus) {
1462 spin_unlock(&u3d->lock);
1463 mv_u3d_vbus_session(&u3d->gadget, 0);
1464 spin_lock(&u3d->lock);
1465 }
1466 }
1467 }
1468
1469 static void mv_u3d_ch9setaddress(struct mv_u3d *u3d,
1470 struct usb_ctrlrequest *setup)
1471 {
1472 u32 tmp;
1473
1474 if (u3d->usb_state != USB_STATE_DEFAULT) {
1475 dev_err(u3d->dev,
1476 "%s, cannot setaddr in this state (%d)\n",
1477 __func__, u3d->usb_state);
1478 goto err;
1479 }
1480
1481 u3d->dev_addr = (u8)setup->wValue;
1482
1483 dev_dbg(u3d->dev, "%s: 0x%x\n", __func__, u3d->dev_addr);
1484
1485 if (u3d->dev_addr > 127) {
1486 dev_err(u3d->dev,
1487 "%s, u3d address is wrong (out of range)\n", __func__);
1488 u3d->dev_addr = 0;
1489 goto err;
1490 }
1491
1492 /* update usb state */
1493 u3d->usb_state = USB_STATE_ADDRESS;
1494
1495 /* set the new address */
1496 tmp = ioread32(&u3d->vuc_regs->devaddrtiebrkr);
1497 tmp &= ~0x7F;
1498 tmp |= (u32)u3d->dev_addr;
1499 iowrite32(tmp, &u3d->vuc_regs->devaddrtiebrkr);
1500
1501 return;
1502 err:
1503 mv_u3d_ep0_stall(u3d);
1504 }
1505
1506 static int mv_u3d_is_set_configuration(struct usb_ctrlrequest *setup)
1507 {
1508 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
1509 if (setup->bRequest == USB_REQ_SET_CONFIGURATION)
1510 return 1;
1511
1512 return 0;
1513 }
1514
1515 static void mv_u3d_handle_setup_packet(struct mv_u3d *u3d, u8 ep_num,
1516 struct usb_ctrlrequest *setup)
1517 __releases(&u3c->lock)
1518 __acquires(&u3c->lock)
1519 {
1520 bool delegate = false;
1521
1522 mv_u3d_nuke(&u3d->eps[ep_num * 2 + MV_U3D_EP_DIR_IN], -ESHUTDOWN);
1523
1524 dev_dbg(u3d->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1525 setup->bRequestType, setup->bRequest,
1526 setup->wValue, setup->wIndex, setup->wLength);
1527
1528 /* We process some stardard setup requests here */
1529 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1530 switch (setup->bRequest) {
1531 case USB_REQ_GET_STATUS:
1532 delegate = true;
1533 break;
1534
1535 case USB_REQ_SET_ADDRESS:
1536 mv_u3d_ch9setaddress(u3d, setup);
1537 break;
1538
1539 case USB_REQ_CLEAR_FEATURE:
1540 delegate = true;
1541 break;
1542
1543 case USB_REQ_SET_FEATURE:
1544 delegate = true;
1545 break;
1546
1547 default:
1548 delegate = true;
1549 }
1550 } else
1551 delegate = true;
1552
1553 /* delegate USB standard requests to the gadget driver */
1554 if (delegate == true) {
1555 /* USB requests handled by gadget */
1556 if (setup->wLength) {
1557 /* DATA phase from gadget, STATUS phase from u3d */
1558 u3d->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1559 ? MV_U3D_EP_DIR_IN : MV_U3D_EP_DIR_OUT;
1560 spin_unlock(&u3d->lock);
1561 if (u3d->driver->setup(&u3d->gadget,
1562 &u3d->local_setup_buff) < 0) {
1563 dev_err(u3d->dev, "setup error!\n");
1564 mv_u3d_ep0_stall(u3d);
1565 }
1566 spin_lock(&u3d->lock);
1567 } else {
1568 /* no DATA phase, STATUS phase from gadget */
1569 u3d->ep0_dir = MV_U3D_EP_DIR_IN;
1570 u3d->ep0_state = MV_U3D_STATUS_STAGE;
1571 spin_unlock(&u3d->lock);
1572 if (u3d->driver->setup(&u3d->gadget,
1573 &u3d->local_setup_buff) < 0)
1574 mv_u3d_ep0_stall(u3d);
1575 spin_lock(&u3d->lock);
1576 }
1577
1578 if (mv_u3d_is_set_configuration(setup)) {
1579 dev_dbg(u3d->dev, "u3d configured\n");
1580 u3d->usb_state = USB_STATE_CONFIGURED;
1581 }
1582 }
1583 }
1584
1585 static void mv_u3d_get_setup_data(struct mv_u3d *u3d, u8 ep_num, u8 *buffer_ptr)
1586 {
1587 struct mv_u3d_ep_context *epcontext;
1588
1589 epcontext = &u3d->ep_context[ep_num * 2 + MV_U3D_EP_DIR_IN];
1590
1591 /* Copy the setup packet to local buffer */
1592 memcpy(buffer_ptr, (u8 *) &epcontext->setup_buffer, 8);
1593 }
1594
1595 static void mv_u3d_irq_process_setup(struct mv_u3d *u3d)
1596 {
1597 u32 tmp, i;
1598 /* Process all Setup packet received interrupts */
1599 tmp = ioread32(&u3d->vuc_regs->setuplock);
1600 if (tmp) {
1601 for (i = 0; i < u3d->max_eps; i++) {
1602 if (tmp & (1 << i)) {
1603 mv_u3d_get_setup_data(u3d, i,
1604 (u8 *)(&u3d->local_setup_buff));
1605 mv_u3d_handle_setup_packet(u3d, i,
1606 &u3d->local_setup_buff);
1607 }
1608 }
1609 }
1610
1611 iowrite32(tmp, &u3d->vuc_regs->setuplock);
1612 }
1613
1614 static void mv_u3d_irq_process_tr_complete(struct mv_u3d *u3d)
1615 {
1616 u32 tmp, bit_pos;
1617 int i, ep_num = 0, direction = 0;
1618 struct mv_u3d_ep *curr_ep;
1619 struct mv_u3d_req *curr_req, *temp_req;
1620 int status;
1621
1622 tmp = ioread32(&u3d->vuc_regs->endcomplete);
1623
1624 dev_dbg(u3d->dev, "tr_complete: ep: 0x%x\n", tmp);
1625 if (!tmp)
1626 return;
1627 iowrite32(tmp, &u3d->vuc_regs->endcomplete);
1628
1629 for (i = 0; i < u3d->max_eps * 2; i++) {
1630 ep_num = i >> 1;
1631 direction = i % 2;
1632
1633 bit_pos = 1 << (ep_num + 16 * direction);
1634
1635 if (!(bit_pos & tmp))
1636 continue;
1637
1638 if (i == 0)
1639 curr_ep = &u3d->eps[1];
1640 else
1641 curr_ep = &u3d->eps[i];
1642
1643 /* remove req out of ep request list after completion */
1644 dev_dbg(u3d->dev, "tr comp: check req_list\n");
1645 spin_lock(&curr_ep->req_lock);
1646 if (!list_empty(&curr_ep->req_list)) {
1647 struct mv_u3d_req *req;
1648 req = list_entry(curr_ep->req_list.next,
1649 struct mv_u3d_req, list);
1650 list_del_init(&req->list);
1651 curr_ep->processing = 0;
1652 }
1653 spin_unlock(&curr_ep->req_lock);
1654
1655 /* process the req queue until an uncomplete request */
1656 list_for_each_entry_safe(curr_req, temp_req,
1657 &curr_ep->queue, queue) {
1658 status = mv_u3d_process_ep_req(u3d, i, curr_req);
1659 if (status)
1660 break;
1661 /* write back status to req */
1662 curr_req->req.status = status;
1663
1664 /* ep0 request completion */
1665 if (ep_num == 0) {
1666 mv_u3d_done(curr_ep, curr_req, 0);
1667 break;
1668 } else {
1669 mv_u3d_done(curr_ep, curr_req, status);
1670 }
1671 }
1672
1673 dev_dbg(u3d->dev, "call mv_u3d_start_queue from ep complete\n");
1674 mv_u3d_start_queue(curr_ep);
1675 }
1676 }
1677
1678 static irqreturn_t mv_u3d_irq(int irq, void *dev)
1679 {
1680 struct mv_u3d *u3d = (struct mv_u3d *)dev;
1681 u32 status, intr;
1682 u32 bridgesetting;
1683 u32 trbunderrun;
1684
1685 spin_lock(&u3d->lock);
1686
1687 status = ioread32(&u3d->vuc_regs->intrcause);
1688 intr = ioread32(&u3d->vuc_regs->intrenable);
1689 status &= intr;
1690
1691 if (status == 0) {
1692 spin_unlock(&u3d->lock);
1693 dev_err(u3d->dev, "irq error!\n");
1694 return IRQ_NONE;
1695 }
1696
1697 if (status & MV_U3D_USBINT_VBUS_VALID) {
1698 bridgesetting = ioread32(&u3d->vuc_regs->bridgesetting);
1699 if (bridgesetting & MV_U3D_BRIDGE_SETTING_VBUS_VALID) {
1700 /* write vbus valid bit of bridge setting to clear */
1701 bridgesetting = MV_U3D_BRIDGE_SETTING_VBUS_VALID;
1702 iowrite32(bridgesetting, &u3d->vuc_regs->bridgesetting);
1703 dev_dbg(u3d->dev, "vbus valid\n");
1704
1705 u3d->usb_state = USB_STATE_POWERED;
1706 u3d->vbus_valid_detect = 0;
1707 /* if external vbus detect is not supported,
1708 * we handle it here.
1709 */
1710 if (!u3d->vbus) {
1711 spin_unlock(&u3d->lock);
1712 mv_u3d_vbus_session(&u3d->gadget, 1);
1713 spin_lock(&u3d->lock);
1714 }
1715 } else
1716 dev_err(u3d->dev, "vbus bit is not set\n");
1717 }
1718
1719 /* RX data is already in the 16KB FIFO.*/
1720 if (status & MV_U3D_USBINT_UNDER_RUN) {
1721 trbunderrun = ioread32(&u3d->vuc_regs->trbunderrun);
1722 dev_err(u3d->dev, "under run, ep%d\n", trbunderrun);
1723 iowrite32(trbunderrun, &u3d->vuc_regs->trbunderrun);
1724 mv_u3d_irq_process_error(u3d);
1725 }
1726
1727 if (status & (MV_U3D_USBINT_RXDESC_ERR | MV_U3D_USBINT_TXDESC_ERR)) {
1728 /* write one to clear */
1729 iowrite32(status & (MV_U3D_USBINT_RXDESC_ERR
1730 | MV_U3D_USBINT_TXDESC_ERR),
1731 &u3d->vuc_regs->intrcause);
1732 dev_err(u3d->dev, "desc err 0x%x\n", status);
1733 mv_u3d_irq_process_error(u3d);
1734 }
1735
1736 if (status & MV_U3D_USBINT_LINK_CHG)
1737 mv_u3d_irq_process_link_change(u3d);
1738
1739 if (status & MV_U3D_USBINT_TX_COMPLETE)
1740 mv_u3d_irq_process_tr_complete(u3d);
1741
1742 if (status & MV_U3D_USBINT_RX_COMPLETE)
1743 mv_u3d_irq_process_tr_complete(u3d);
1744
1745 if (status & MV_U3D_USBINT_SETUP)
1746 mv_u3d_irq_process_setup(u3d);
1747
1748 spin_unlock(&u3d->lock);
1749 return IRQ_HANDLED;
1750 }
1751
1752 static int mv_u3d_remove(struct platform_device *dev)
1753 {
1754 struct mv_u3d *u3d = platform_get_drvdata(dev);
1755
1756 BUG_ON(u3d == NULL);
1757
1758 usb_del_gadget_udc(&u3d->gadget);
1759
1760 /* free memory allocated in probe */
1761 if (u3d->trb_pool)
1762 dma_pool_destroy(u3d->trb_pool);
1763
1764 if (u3d->ep_context)
1765 dma_free_coherent(&dev->dev, u3d->ep_context_size,
1766 u3d->ep_context, u3d->ep_context_dma);
1767
1768 kfree(u3d->eps);
1769
1770 if (u3d->irq)
1771 free_irq(u3d->irq, u3d);
1772
1773 if (u3d->cap_regs)
1774 iounmap(u3d->cap_regs);
1775 u3d->cap_regs = NULL;
1776
1777 kfree(u3d->status_req);
1778
1779 clk_put(u3d->clk);
1780
1781 kfree(u3d);
1782
1783 return 0;
1784 }
1785
1786 static int mv_u3d_probe(struct platform_device *dev)
1787 {
1788 struct mv_u3d *u3d = NULL;
1789 struct mv_usb_platform_data *pdata = dev_get_platdata(&dev->dev);
1790 int retval = 0;
1791 struct resource *r;
1792 size_t size;
1793
1794 if (!dev_get_platdata(&dev->dev)) {
1795 dev_err(&dev->dev, "missing platform_data\n");
1796 retval = -ENODEV;
1797 goto err_pdata;
1798 }
1799
1800 u3d = kzalloc(sizeof(*u3d), GFP_KERNEL);
1801 if (!u3d) {
1802 retval = -ENOMEM;
1803 goto err_alloc_private;
1804 }
1805
1806 spin_lock_init(&u3d->lock);
1807
1808 platform_set_drvdata(dev, u3d);
1809
1810 u3d->dev = &dev->dev;
1811 u3d->vbus = pdata->vbus;
1812
1813 u3d->clk = clk_get(&dev->dev, NULL);
1814 if (IS_ERR(u3d->clk)) {
1815 retval = PTR_ERR(u3d->clk);
1816 goto err_get_clk;
1817 }
1818
1819 r = platform_get_resource_byname(dev, IORESOURCE_MEM, "capregs");
1820 if (!r) {
1821 dev_err(&dev->dev, "no I/O memory resource defined\n");
1822 retval = -ENODEV;
1823 goto err_get_cap_regs;
1824 }
1825
1826 u3d->cap_regs = (struct mv_u3d_cap_regs __iomem *)
1827 ioremap(r->start, resource_size(r));
1828 if (!u3d->cap_regs) {
1829 dev_err(&dev->dev, "failed to map I/O memory\n");
1830 retval = -EBUSY;
1831 goto err_map_cap_regs;
1832 } else {
1833 dev_dbg(&dev->dev, "cap_regs address: 0x%lx/0x%lx\n",
1834 (unsigned long) r->start,
1835 (unsigned long) u3d->cap_regs);
1836 }
1837
1838 /* we will access controller register, so enable the u3d controller */
1839 clk_enable(u3d->clk);
1840
1841 if (pdata->phy_init) {
1842 retval = pdata->phy_init(u3d->phy_regs);
1843 if (retval) {
1844 dev_err(&dev->dev, "init phy error %d\n", retval);
1845 goto err_u3d_enable;
1846 }
1847 }
1848
1849 u3d->op_regs = (struct mv_u3d_op_regs __iomem *)(u3d->cap_regs
1850 + MV_U3D_USB3_OP_REGS_OFFSET);
1851
1852 u3d->vuc_regs = (struct mv_u3d_vuc_regs __iomem *)(u3d->cap_regs
1853 + ioread32(&u3d->cap_regs->vuoff));
1854
1855 u3d->max_eps = 16;
1856
1857 /*
1858 * some platform will use usb to download image, it may not disconnect
1859 * usb gadget before loading kernel. So first stop u3d here.
1860 */
1861 mv_u3d_controller_stop(u3d);
1862 iowrite32(0xFFFFFFFF, &u3d->vuc_regs->intrcause);
1863
1864 if (pdata->phy_deinit)
1865 pdata->phy_deinit(u3d->phy_regs);
1866 clk_disable(u3d->clk);
1867
1868 size = u3d->max_eps * sizeof(struct mv_u3d_ep_context) * 2;
1869 size = (size + MV_U3D_EP_CONTEXT_ALIGNMENT - 1)
1870 & ~(MV_U3D_EP_CONTEXT_ALIGNMENT - 1);
1871 u3d->ep_context = dma_alloc_coherent(&dev->dev, size,
1872 &u3d->ep_context_dma, GFP_KERNEL);
1873 if (!u3d->ep_context) {
1874 dev_err(&dev->dev, "allocate ep context memory failed\n");
1875 retval = -ENOMEM;
1876 goto err_alloc_ep_context;
1877 }
1878 u3d->ep_context_size = size;
1879
1880 /* create TRB dma_pool resource */
1881 u3d->trb_pool = dma_pool_create("u3d_trb",
1882 &dev->dev,
1883 sizeof(struct mv_u3d_trb_hw),
1884 MV_U3D_TRB_ALIGNMENT,
1885 MV_U3D_DMA_BOUNDARY);
1886
1887 if (!u3d->trb_pool) {
1888 retval = -ENOMEM;
1889 goto err_alloc_trb_pool;
1890 }
1891
1892 size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2;
1893 u3d->eps = kzalloc(size, GFP_KERNEL);
1894 if (!u3d->eps) {
1895 retval = -ENOMEM;
1896 goto err_alloc_eps;
1897 }
1898
1899 /* initialize ep0 status request structure */
1900 u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL);
1901 if (!u3d->status_req) {
1902 retval = -ENOMEM;
1903 goto err_alloc_status_req;
1904 }
1905 INIT_LIST_HEAD(&u3d->status_req->queue);
1906
1907 /* allocate a small amount of memory to get valid address */
1908 u3d->status_req->req.buf = (char *)u3d->status_req
1909 + sizeof(struct mv_u3d_req);
1910 u3d->status_req->req.dma = virt_to_phys(u3d->status_req->req.buf);
1911
1912 u3d->resume_state = USB_STATE_NOTATTACHED;
1913 u3d->usb_state = USB_STATE_ATTACHED;
1914 u3d->ep0_dir = MV_U3D_EP_DIR_OUT;
1915 u3d->remote_wakeup = 0;
1916
1917 r = platform_get_resource(dev, IORESOURCE_IRQ, 0);
1918 if (!r) {
1919 dev_err(&dev->dev, "no IRQ resource defined\n");
1920 retval = -ENODEV;
1921 goto err_get_irq;
1922 }
1923 u3d->irq = r->start;
1924 if (request_irq(u3d->irq, mv_u3d_irq,
1925 IRQF_SHARED, driver_name, u3d)) {
1926 u3d->irq = 0;
1927 dev_err(&dev->dev, "Request irq %d for u3d failed\n",
1928 u3d->irq);
1929 retval = -ENODEV;
1930 goto err_request_irq;
1931 }
1932
1933 /* initialize gadget structure */
1934 u3d->gadget.ops = &mv_u3d_ops; /* usb_gadget_ops */
1935 u3d->gadget.ep0 = &u3d->eps[1].ep; /* gadget ep0 */
1936 INIT_LIST_HEAD(&u3d->gadget.ep_list); /* ep_list */
1937 u3d->gadget.speed = USB_SPEED_UNKNOWN; /* speed */
1938
1939 /* the "gadget" abstracts/virtualizes the controller */
1940 u3d->gadget.name = driver_name; /* gadget name */
1941
1942 mv_u3d_eps_init(u3d);
1943
1944 /* external vbus detection */
1945 if (u3d->vbus) {
1946 u3d->clock_gating = 1;
1947 dev_err(&dev->dev, "external vbus detection\n");
1948 }
1949
1950 if (!u3d->clock_gating)
1951 u3d->vbus_active = 1;
1952
1953 /* enable usb3 controller vbus detection */
1954 u3d->vbus_valid_detect = 1;
1955
1956 retval = usb_add_gadget_udc(&dev->dev, &u3d->gadget);
1957 if (retval)
1958 goto err_unregister;
1959
1960 dev_dbg(&dev->dev, "successful probe usb3 device %s clock gating.\n",
1961 u3d->clock_gating ? "with" : "without");
1962
1963 return 0;
1964
1965 err_unregister:
1966 free_irq(u3d->irq, u3d);
1967 err_request_irq:
1968 err_get_irq:
1969 kfree(u3d->status_req);
1970 err_alloc_status_req:
1971 kfree(u3d->eps);
1972 err_alloc_eps:
1973 dma_pool_destroy(u3d->trb_pool);
1974 err_alloc_trb_pool:
1975 dma_free_coherent(&dev->dev, u3d->ep_context_size,
1976 u3d->ep_context, u3d->ep_context_dma);
1977 err_alloc_ep_context:
1978 if (pdata->phy_deinit)
1979 pdata->phy_deinit(u3d->phy_regs);
1980 clk_disable(u3d->clk);
1981 err_u3d_enable:
1982 iounmap(u3d->cap_regs);
1983 err_map_cap_regs:
1984 err_get_cap_regs:
1985 err_get_clk:
1986 clk_put(u3d->clk);
1987 kfree(u3d);
1988 err_alloc_private:
1989 err_pdata:
1990 return retval;
1991 }
1992
1993 #ifdef CONFIG_PM_SLEEP
1994 static int mv_u3d_suspend(struct device *dev)
1995 {
1996 struct mv_u3d *u3d = dev_get_drvdata(dev);
1997
1998 /*
1999 * only cable is unplugged, usb can suspend.
2000 * So do not care about clock_gating == 1, it is handled by
2001 * vbus session.
2002 */
2003 if (!u3d->clock_gating) {
2004 mv_u3d_controller_stop(u3d);
2005
2006 spin_lock_irq(&u3d->lock);
2007 /* stop all usb activities */
2008 mv_u3d_stop_activity(u3d, u3d->driver);
2009 spin_unlock_irq(&u3d->lock);
2010
2011 mv_u3d_disable(u3d);
2012 }
2013
2014 return 0;
2015 }
2016
2017 static int mv_u3d_resume(struct device *dev)
2018 {
2019 struct mv_u3d *u3d = dev_get_drvdata(dev);
2020 int retval;
2021
2022 if (!u3d->clock_gating) {
2023 retval = mv_u3d_enable(u3d);
2024 if (retval)
2025 return retval;
2026
2027 if (u3d->driver && u3d->softconnect) {
2028 mv_u3d_controller_reset(u3d);
2029 mv_u3d_ep0_reset(u3d);
2030 mv_u3d_controller_start(u3d);
2031 }
2032 }
2033
2034 return 0;
2035 }
2036 #endif
2037
2038 static SIMPLE_DEV_PM_OPS(mv_u3d_pm_ops, mv_u3d_suspend, mv_u3d_resume);
2039
2040 static void mv_u3d_shutdown(struct platform_device *dev)
2041 {
2042 struct mv_u3d *u3d = platform_get_drvdata(dev);
2043 u32 tmp;
2044
2045 tmp = ioread32(&u3d->op_regs->usbcmd);
2046 tmp &= ~MV_U3D_CMD_RUN_STOP;
2047 iowrite32(tmp, &u3d->op_regs->usbcmd);
2048 }
2049
2050 static struct platform_driver mv_u3d_driver = {
2051 .probe = mv_u3d_probe,
2052 .remove = mv_u3d_remove,
2053 .shutdown = mv_u3d_shutdown,
2054 .driver = {
2055 .name = "mv-u3d",
2056 .pm = &mv_u3d_pm_ops,
2057 },
2058 };
2059
2060 module_platform_driver(mv_u3d_driver);
2061 MODULE_ALIAS("platform:mv-u3d");
2062 MODULE_DESCRIPTION(DRIVER_DESC);
2063 MODULE_AUTHOR("Yu Xu <yuxu@marvell.com>");
2064 MODULE_LICENSE("GPL");
Linux with added FPC-III support