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USB: fsl_qe_udc: Fix oops on QE UDC probe failure
[linux-2.6/libata-dev.git] / drivers / usb / gadget / fsl_qe_udc.c
blobe8f7862acb3dcf0657575c09c53acb0235321f1b
1 /*
2 * driver/usb/gadget/fsl_qe_udc.c
3 *
4 * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved.
5 *
6 * Xie Xiaobo <X.Xie@freescale.com>
7 * Li Yang <leoli@freescale.com>
8 * Based on bareboard code from Shlomi Gridish.
9 *
10 * Description:
11 * Freescle QE/CPM USB Pheripheral Controller Driver
12 * The controller can be found on MPC8360, MPC8272, and etc.
13 * MPC8360 Rev 1.1 may need QE mircocode update
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 */
20
21 #undef USB_TRACE
22
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/init.h>
26 #include <linux/ioport.h>
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/err.h>
30 #include <linux/slab.h>
31 #include <linux/list.h>
32 #include <linux/interrupt.h>
33 #include <linux/io.h>
34 #include <linux/moduleparam.h>
35 #include <linux/of_platform.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/usb/ch9.h>
38 #include <linux/usb/gadget.h>
39 #include <linux/usb/otg.h>
40 #include <asm/qe.h>
41 #include <asm/cpm.h>
42 #include <asm/dma.h>
43 #include <asm/reg.h>
44 #include "fsl_qe_udc.h"
45
46 #define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver"
47 #define DRIVER_AUTHOR "Xie XiaoBo"
48 #define DRIVER_VERSION "1.0"
49
50 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
51
52 static const char driver_name[] = "fsl_qe_udc";
53 static const char driver_desc[] = DRIVER_DESC;
54
55 /*ep name is important in gadget, it should obey the convention of ep_match()*/
56 static const char *const ep_name[] = {
57 "ep0-control", /* everyone has ep0 */
58 /* 3 configurable endpoints */
59 "ep1",
60 "ep2",
61 "ep3",
62 };
63
64 static struct usb_endpoint_descriptor qe_ep0_desc = {
65 .bLength = USB_DT_ENDPOINT_SIZE,
66 .bDescriptorType = USB_DT_ENDPOINT,
67
68 .bEndpointAddress = 0,
69 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
70 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
71 };
72
73 /* it is initialized in probe() */
74 static struct qe_udc *udc_controller;
75
76 /********************************************************************
77 * Internal Used Function Start
78 ********************************************************************/
79 /*-----------------------------------------------------------------
80 * done() - retire a request; caller blocked irqs
81 *--------------------------------------------------------------*/
82 static void done(struct qe_ep *ep, struct qe_req *req, int status)
83 {
84 struct qe_udc *udc = ep->udc;
85 unsigned char stopped = ep->stopped;
86
87 /* the req->queue pointer is used by ep_queue() func, in which
88 * the request will be added into a udc_ep->queue 'd tail
89 * so here the req will be dropped from the ep->queue
90 */
91 list_del_init(&req->queue);
92
93 /* req.status should be set as -EINPROGRESS in ep_queue() */
94 if (req->req.status == -EINPROGRESS)
95 req->req.status = status;
96 else
97 status = req->req.status;
98
99 if (req->mapped) {
100 dma_unmap_single(udc->gadget.dev.parent,
101 req->req.dma, req->req.length,
102 ep_is_in(ep)
103 ? DMA_TO_DEVICE
104 : DMA_FROM_DEVICE);
105 req->req.dma = DMA_ADDR_INVALID;
106 req->mapped = 0;
107 } else
108 dma_sync_single_for_cpu(udc->gadget.dev.parent,
109 req->req.dma, req->req.length,
110 ep_is_in(ep)
111 ? DMA_TO_DEVICE
112 : DMA_FROM_DEVICE);
113
114 if (status && (status != -ESHUTDOWN))
115 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
116 ep->ep.name, &req->req, status,
117 req->req.actual, req->req.length);
118
119 /* don't modify queue heads during completion callback */
120 ep->stopped = 1;
121 spin_unlock(&udc->lock);
122
123 /* this complete() should a func implemented by gadget layer,
124 * eg fsg->bulk_in_complete() */
125 if (req->req.complete)
126 req->req.complete(&ep->ep, &req->req);
127
128 spin_lock(&udc->lock);
129
130 ep->stopped = stopped;
131 }
132
133 /*-----------------------------------------------------------------
134 * nuke(): delete all requests related to this ep
135 *--------------------------------------------------------------*/
136 static void nuke(struct qe_ep *ep, int status)
137 {
138 /* Whether this eq has request linked */
139 while (!list_empty(&ep->queue)) {
140 struct qe_req *req = NULL;
141 req = list_entry(ep->queue.next, struct qe_req, queue);
142
143 done(ep, req, status);
144 }
145 }
146
147 /*---------------------------------------------------------------------------*
148 * USB and Endpoint manipulate process, include parameter and register *
149 *---------------------------------------------------------------------------*/
150 /* @value: 1--set stall 0--clean stall */
151 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
152 {
153 u16 tem_usep;
154 u8 epnum = ep->epnum;
155 struct qe_udc *udc = ep->udc;
156
157 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
158 tem_usep = tem_usep & ~USB_RHS_MASK;
159 if (value == 1)
160 tem_usep |= USB_RHS_STALL;
161 else if (ep->dir == USB_DIR_IN)
162 tem_usep |= USB_RHS_IGNORE_OUT;
163
164 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
165 return 0;
166 }
167
168 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
169 {
170 u16 tem_usep;
171 u8 epnum = ep->epnum;
172 struct qe_udc *udc = ep->udc;
173
174 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
175 tem_usep = tem_usep & ~USB_THS_MASK;
176 if (value == 1)
177 tem_usep |= USB_THS_STALL;
178 else if (ep->dir == USB_DIR_OUT)
179 tem_usep |= USB_THS_IGNORE_IN;
180
181 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
182
183 return 0;
184 }
185
186 static int qe_ep0_stall(struct qe_udc *udc)
187 {
188 qe_eptx_stall_change(&udc->eps[0], 1);
189 qe_eprx_stall_change(&udc->eps[0], 1);
190 udc_controller->ep0_state = WAIT_FOR_SETUP;
191 udc_controller->ep0_dir = 0;
192 return 0;
193 }
194
195 static int qe_eprx_nack(struct qe_ep *ep)
196 {
197 u8 epnum = ep->epnum;
198 struct qe_udc *udc = ep->udc;
199
200 if (ep->state == EP_STATE_IDLE) {
201 /* Set the ep's nack */
202 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
203 USB_RHS_MASK, USB_RHS_NACK);
204
205 /* Mask Rx and Busy interrupts */
206 clrbits16(&udc->usb_regs->usb_usbmr,
207 (USB_E_RXB_MASK | USB_E_BSY_MASK));
208
209 ep->state = EP_STATE_NACK;
210 }
211 return 0;
212 }
213
214 static int qe_eprx_normal(struct qe_ep *ep)
215 {
216 struct qe_udc *udc = ep->udc;
217
218 if (ep->state == EP_STATE_NACK) {
219 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
220 USB_RTHS_MASK, USB_THS_IGNORE_IN);
221
222 /* Unmask RX interrupts */
223 out_be16(&udc->usb_regs->usb_usber,
224 USB_E_BSY_MASK | USB_E_RXB_MASK);
225 setbits16(&udc->usb_regs->usb_usbmr,
226 (USB_E_RXB_MASK | USB_E_BSY_MASK));
227
228 ep->state = EP_STATE_IDLE;
229 ep->has_data = 0;
230 }
231
232 return 0;
233 }
234
235 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
236 {
237 if (ep->udc->soc_type == PORT_CPM)
238 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
239 CPM_USB_STOP_TX_OPCODE);
240 else
241 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
242 ep->epnum, 0);
243
244 return 0;
245 }
246
247 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
248 {
249 if (ep->udc->soc_type == PORT_CPM)
250 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
251 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
252 else
253 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
254 ep->epnum, 0);
255
256 return 0;
257 }
258
259 static int qe_ep_flushtxfifo(struct qe_ep *ep)
260 {
261 struct qe_udc *udc = ep->udc;
262 int i;
263
264 i = (int)ep->epnum;
265
266 qe_ep_cmd_stoptx(ep);
267 out_8(&udc->usb_regs->usb_uscom,
268 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
269 out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
270 out_be32(&udc->ep_param[i]->tstate, 0);
271 out_be16(&udc->ep_param[i]->tbcnt, 0);
272
273 ep->c_txbd = ep->txbase;
274 ep->n_txbd = ep->txbase;
275 qe_ep_cmd_restarttx(ep);
276 return 0;
277 }
278
279 static int qe_ep_filltxfifo(struct qe_ep *ep)
280 {
281 struct qe_udc *udc = ep->udc;
282
283 out_8(&udc->usb_regs->usb_uscom,
284 USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
285 return 0;
286 }
287
288 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
289 {
290 struct qe_ep *ep;
291 u32 bdring_len;
292 struct qe_bd __iomem *bd;
293 int i;
294
295 ep = &udc->eps[pipe_num];
296
297 if (ep->dir == USB_DIR_OUT)
298 bdring_len = USB_BDRING_LEN_RX;
299 else
300 bdring_len = USB_BDRING_LEN;
301
302 bd = ep->rxbase;
303 for (i = 0; i < (bdring_len - 1); i++) {
304 out_be32((u32 __iomem *)bd, R_E | R_I);
305 bd++;
306 }
307 out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
308
309 bd = ep->txbase;
310 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
311 out_be32(&bd->buf, 0);
312 out_be32((u32 __iomem *)bd, 0);
313 bd++;
314 }
315 out_be32((u32 __iomem *)bd, T_W);
316
317 return 0;
318 }
319
320 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
321 {
322 struct qe_ep *ep;
323 u16 tmpusep;
324
325 ep = &udc->eps[pipe_num];
326 tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
327 tmpusep &= ~USB_RTHS_MASK;
328
329 switch (ep->dir) {
330 case USB_DIR_BOTH:
331 qe_ep_flushtxfifo(ep);
332 break;
333 case USB_DIR_OUT:
334 tmpusep |= USB_THS_IGNORE_IN;
335 break;
336 case USB_DIR_IN:
337 qe_ep_flushtxfifo(ep);
338 tmpusep |= USB_RHS_IGNORE_OUT;
339 break;
340 default:
341 break;
342 }
343 out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
344
345 qe_epbds_reset(udc, pipe_num);
346
347 return 0;
348 }
349
350 static int qe_ep_toggledata01(struct qe_ep *ep)
351 {
352 ep->data01 ^= 0x1;
353 return 0;
354 }
355
356 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
357 {
358 struct qe_ep *ep = &udc->eps[pipe_num];
359 unsigned long tmp_addr = 0;
360 struct usb_ep_para __iomem *epparam;
361 int i;
362 struct qe_bd __iomem *bd;
363 int bdring_len;
364
365 if (ep->dir == USB_DIR_OUT)
366 bdring_len = USB_BDRING_LEN_RX;
367 else
368 bdring_len = USB_BDRING_LEN;
369
370 epparam = udc->ep_param[pipe_num];
371 /* alloc multi-ram for BD rings and set the ep parameters */
372 tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
373 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
374 if (IS_ERR_VALUE(tmp_addr))
375 return -ENOMEM;
376
377 out_be16(&epparam->rbase, (u16)tmp_addr);
378 out_be16(&epparam->tbase, (u16)(tmp_addr +
379 (sizeof(struct qe_bd) * bdring_len)));
380
381 out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
382 out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
383
384 ep->rxbase = cpm_muram_addr(tmp_addr);
385 ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
386 * bdring_len));
387 ep->n_rxbd = ep->rxbase;
388 ep->e_rxbd = ep->rxbase;
389 ep->n_txbd = ep->txbase;
390 ep->c_txbd = ep->txbase;
391 ep->data01 = 0; /* data0 */
392
393 /* Init TX and RX bds */
394 bd = ep->rxbase;
395 for (i = 0; i < bdring_len - 1; i++) {
396 out_be32(&bd->buf, 0);
397 out_be32((u32 __iomem *)bd, 0);
398 bd++;
399 }
400 out_be32(&bd->buf, 0);
401 out_be32((u32 __iomem *)bd, R_W);
402
403 bd = ep->txbase;
404 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
405 out_be32(&bd->buf, 0);
406 out_be32((u32 __iomem *)bd, 0);
407 bd++;
408 }
409 out_be32(&bd->buf, 0);
410 out_be32((u32 __iomem *)bd, T_W);
411
412 return 0;
413 }
414
415 static int qe_ep_rxbd_update(struct qe_ep *ep)
416 {
417 unsigned int size;
418 int i;
419 unsigned int tmp;
420 struct qe_bd __iomem *bd;
421 unsigned int bdring_len;
422
423 if (ep->rxbase == NULL)
424 return -EINVAL;
425
426 bd = ep->rxbase;
427
428 ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
429 if (ep->rxframe == NULL) {
430 dev_err(ep->udc->dev, "malloc rxframe failed\n");
431 return -ENOMEM;
432 }
433
434 qe_frame_init(ep->rxframe);
435
436 if (ep->dir == USB_DIR_OUT)
437 bdring_len = USB_BDRING_LEN_RX;
438 else
439 bdring_len = USB_BDRING_LEN;
440
441 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
442 ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
443 if (ep->rxbuffer == NULL) {
444 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
445 size);
446 kfree(ep->rxframe);
447 return -ENOMEM;
448 }
449
450 ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
451 if (ep->rxbuf_d == DMA_ADDR_INVALID) {
452 ep->rxbuf_d = dma_map_single(udc_controller->gadget.dev.parent,
453 ep->rxbuffer,
454 size,
455 DMA_FROM_DEVICE);
456 ep->rxbufmap = 1;
457 } else {
458 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
459 ep->rxbuf_d, size,
460 DMA_FROM_DEVICE);
461 ep->rxbufmap = 0;
462 }
463
464 size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
465 tmp = ep->rxbuf_d;
466 tmp = (u32)(((tmp >> 2) << 2) + 4);
467
468 for (i = 0; i < bdring_len - 1; i++) {
469 out_be32(&bd->buf, tmp);
470 out_be32((u32 __iomem *)bd, (R_E | R_I));
471 tmp = tmp + size;
472 bd++;
473 }
474 out_be32(&bd->buf, tmp);
475 out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
476
477 return 0;
478 }
479
480 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
481 {
482 struct qe_ep *ep = &udc->eps[pipe_num];
483 struct usb_ep_para __iomem *epparam;
484 u16 usep, logepnum;
485 u16 tmp;
486 u8 rtfcr = 0;
487
488 epparam = udc->ep_param[pipe_num];
489
490 usep = 0;
491 logepnum = (ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
492 usep |= (logepnum << USB_EPNUM_SHIFT);
493
494 switch (ep->desc->bmAttributes & 0x03) {
495 case USB_ENDPOINT_XFER_BULK:
496 usep |= USB_TRANS_BULK;
497 break;
498 case USB_ENDPOINT_XFER_ISOC:
499 usep |= USB_TRANS_ISO;
500 break;
501 case USB_ENDPOINT_XFER_INT:
502 usep |= USB_TRANS_INT;
503 break;
504 default:
505 usep |= USB_TRANS_CTR;
506 break;
507 }
508
509 switch (ep->dir) {
510 case USB_DIR_OUT:
511 usep |= USB_THS_IGNORE_IN;
512 break;
513 case USB_DIR_IN:
514 usep |= USB_RHS_IGNORE_OUT;
515 break;
516 default:
517 break;
518 }
519 out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
520
521 rtfcr = 0x30;
522 out_8(&epparam->rbmr, rtfcr);
523 out_8(&epparam->tbmr, rtfcr);
524
525 tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
526 /* MRBLR must be divisble by 4 */
527 tmp = (u16)(((tmp >> 2) << 2) + 4);
528 out_be16(&epparam->mrblr, tmp);
529
530 return 0;
531 }
532
533 static int qe_ep_init(struct qe_udc *udc,
534 unsigned char pipe_num,
535 const struct usb_endpoint_descriptor *desc)
536 {
537 struct qe_ep *ep = &udc->eps[pipe_num];
538 unsigned long flags;
539 int reval = 0;
540 u16 max = 0;
541
542 max = le16_to_cpu(desc->wMaxPacketSize);
543
544 /* check the max package size validate for this endpoint */
545 /* Refer to USB2.0 spec table 9-13,
546 */
547 if (pipe_num != 0) {
548 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
549 case USB_ENDPOINT_XFER_BULK:
550 if (strstr(ep->ep.name, "-iso")
551 || strstr(ep->ep.name, "-int"))
552 goto en_done;
553 switch (udc->gadget.speed) {
554 case USB_SPEED_HIGH:
555 if ((max == 128) || (max == 256) || (max == 512))
556 break;
557 default:
558 switch (max) {
559 case 4:
560 case 8:
561 case 16:
562 case 32:
563 case 64:
564 break;
565 default:
566 case USB_SPEED_LOW:
567 goto en_done;
568 }
569 }
570 break;
571 case USB_ENDPOINT_XFER_INT:
572 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
573 goto en_done;
574 switch (udc->gadget.speed) {
575 case USB_SPEED_HIGH:
576 if (max <= 1024)
577 break;
578 case USB_SPEED_FULL:
579 if (max <= 64)
580 break;
581 default:
582 if (max <= 8)
583 break;
584 goto en_done;
585 }
586 break;
587 case USB_ENDPOINT_XFER_ISOC:
588 if (strstr(ep->ep.name, "-bulk")
589 || strstr(ep->ep.name, "-int"))
590 goto en_done;
591 switch (udc->gadget.speed) {
592 case USB_SPEED_HIGH:
593 if (max <= 1024)
594 break;
595 case USB_SPEED_FULL:
596 if (max <= 1023)
597 break;
598 default:
599 goto en_done;
600 }
601 break;
602 case USB_ENDPOINT_XFER_CONTROL:
603 if (strstr(ep->ep.name, "-iso")
604 || strstr(ep->ep.name, "-int"))
605 goto en_done;
606 switch (udc->gadget.speed) {
607 case USB_SPEED_HIGH:
608 case USB_SPEED_FULL:
609 switch (max) {
610 case 1:
611 case 2:
612 case 4:
613 case 8:
614 case 16:
615 case 32:
616 case 64:
617 break;
618 default:
619 goto en_done;
620 }
621 case USB_SPEED_LOW:
622 switch (max) {
623 case 1:
624 case 2:
625 case 4:
626 case 8:
627 break;
628 default:
629 goto en_done;
630 }
631 default:
632 goto en_done;
633 }
634 break;
635
636 default:
637 goto en_done;
638 }
639 } /* if ep0*/
640
641 spin_lock_irqsave(&udc->lock, flags);
642
643 /* initialize ep structure */
644 ep->ep.maxpacket = max;
645 ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
646 ep->desc = desc;
647 ep->stopped = 0;
648 ep->init = 1;
649
650 if (pipe_num == 0) {
651 ep->dir = USB_DIR_BOTH;
652 udc->ep0_dir = USB_DIR_OUT;
653 udc->ep0_state = WAIT_FOR_SETUP;
654 } else {
655 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
656 case USB_DIR_OUT:
657 ep->dir = USB_DIR_OUT;
658 break;
659 case USB_DIR_IN:
660 ep->dir = USB_DIR_IN;
661 default:
662 break;
663 }
664 }
665
666 /* hardware special operation */
667 qe_ep_bd_init(udc, pipe_num);
668 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
669 reval = qe_ep_rxbd_update(ep);
670 if (reval)
671 goto en_done1;
672 }
673
674 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
675 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
676 if (ep->txframe == NULL) {
677 dev_err(udc->dev, "malloc txframe failed\n");
678 goto en_done2;
679 }
680 qe_frame_init(ep->txframe);
681 }
682
683 qe_ep_register_init(udc, pipe_num);
684
685 /* Now HW will be NAKing transfers to that EP,
686 * until a buffer is queued to it. */
687 spin_unlock_irqrestore(&udc->lock, flags);
688
689 return 0;
690 en_done2:
691 kfree(ep->rxbuffer);
692 kfree(ep->rxframe);
693 en_done1:
694 spin_unlock_irqrestore(&udc->lock, flags);
695 en_done:
696 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
697 return -ENODEV;
698 }
699
700 static inline void qe_usb_enable(void)
701 {
702 setbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
703 }
704
705 static inline void qe_usb_disable(void)
706 {
707 clrbits8(&udc_controller->usb_regs->usb_usmod, USB_MODE_EN);
708 }
709
710 /*----------------------------------------------------------------------------*
711 * USB and EP basic manipulate function end *
712 *----------------------------------------------------------------------------*/
713
714
715 /******************************************************************************
716 UDC transmit and receive process
717 ******************************************************************************/
718 static void recycle_one_rxbd(struct qe_ep *ep)
719 {
720 u32 bdstatus;
721
722 bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
723 bdstatus = R_I | R_E | (bdstatus & R_W);
724 out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
725
726 if (bdstatus & R_W)
727 ep->e_rxbd = ep->rxbase;
728 else
729 ep->e_rxbd++;
730 }
731
732 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
733 {
734 u32 bdstatus;
735 struct qe_bd __iomem *bd, *nextbd;
736 unsigned char stop = 0;
737
738 nextbd = ep->n_rxbd;
739 bd = ep->e_rxbd;
740 bdstatus = in_be32((u32 __iomem *)bd);
741
742 while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
743 bdstatus = R_E | R_I | (bdstatus & R_W);
744 out_be32((u32 __iomem *)bd, bdstatus);
745
746 if (bdstatus & R_W)
747 bd = ep->rxbase;
748 else
749 bd++;
750
751 bdstatus = in_be32((u32 __iomem *)bd);
752 if (stopatnext && (bd == nextbd))
753 stop = 1;
754 }
755
756 ep->e_rxbd = bd;
757 }
758
759 static void ep_recycle_rxbds(struct qe_ep *ep)
760 {
761 struct qe_bd __iomem *bd = ep->n_rxbd;
762 u32 bdstatus;
763 u8 epnum = ep->epnum;
764 struct qe_udc *udc = ep->udc;
765
766 bdstatus = in_be32((u32 __iomem *)bd);
767 if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
768 bd = ep->rxbase +
769 ((in_be16(&udc->ep_param[epnum]->rbptr) -
770 in_be16(&udc->ep_param[epnum]->rbase))
771 >> 3);
772 bdstatus = in_be32((u32 __iomem *)bd);
773
774 if (bdstatus & R_W)
775 bd = ep->rxbase;
776 else
777 bd++;
778
779 ep->e_rxbd = bd;
780 recycle_rxbds(ep, 0);
781 ep->e_rxbd = ep->n_rxbd;
782 } else
783 recycle_rxbds(ep, 1);
784
785 if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
786 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
787
788 if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
789 qe_eprx_normal(ep);
790
791 ep->localnack = 0;
792 }
793
794 static void setup_received_handle(struct qe_udc *udc,
795 struct usb_ctrlrequest *setup);
796 static int qe_ep_rxframe_handle(struct qe_ep *ep);
797 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
798 /* when BD PID is setup, handle the packet */
799 static int ep0_setup_handle(struct qe_udc *udc)
800 {
801 struct qe_ep *ep = &udc->eps[0];
802 struct qe_frame *pframe;
803 unsigned int fsize;
804 u8 *cp;
805
806 pframe = ep->rxframe;
807 if ((frame_get_info(pframe) & PID_SETUP)
808 && (udc->ep0_state == WAIT_FOR_SETUP)) {
809 fsize = frame_get_length(pframe);
810 if (unlikely(fsize != 8))
811 return -EINVAL;
812 cp = (u8 *)&udc->local_setup_buff;
813 memcpy(cp, pframe->data, fsize);
814 ep->data01 = 1;
815
816 /* handle the usb command base on the usb_ctrlrequest */
817 setup_received_handle(udc, &udc->local_setup_buff);
818 return 0;
819 }
820 return -EINVAL;
821 }
822
823 static int qe_ep0_rx(struct qe_udc *udc)
824 {
825 struct qe_ep *ep = &udc->eps[0];
826 struct qe_frame *pframe;
827 struct qe_bd __iomem *bd;
828 u32 bdstatus, length;
829 u32 vaddr;
830
831 pframe = ep->rxframe;
832
833 if (ep->dir == USB_DIR_IN) {
834 dev_err(udc->dev, "ep0 not a control endpoint\n");
835 return -EINVAL;
836 }
837
838 bd = ep->n_rxbd;
839 bdstatus = in_be32((u32 __iomem *)bd);
840 length = bdstatus & BD_LENGTH_MASK;
841
842 while (!(bdstatus & R_E) && length) {
843 if ((bdstatus & R_F) && (bdstatus & R_L)
844 && !(bdstatus & R_ERROR)) {
845 if (length == USB_CRC_SIZE) {
846 udc->ep0_state = WAIT_FOR_SETUP;
847 dev_vdbg(udc->dev,
848 "receive a ZLP in status phase\n");
849 } else {
850 qe_frame_clean(pframe);
851 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
852 frame_set_data(pframe, (u8 *)vaddr);
853 frame_set_length(pframe,
854 (length - USB_CRC_SIZE));
855 frame_set_status(pframe, FRAME_OK);
856 switch (bdstatus & R_PID) {
857 case R_PID_SETUP:
858 frame_set_info(pframe, PID_SETUP);
859 break;
860 case R_PID_DATA1:
861 frame_set_info(pframe, PID_DATA1);
862 break;
863 default:
864 frame_set_info(pframe, PID_DATA0);
865 break;
866 }
867
868 if ((bdstatus & R_PID) == R_PID_SETUP)
869 ep0_setup_handle(udc);
870 else
871 qe_ep_rxframe_handle(ep);
872 }
873 } else {
874 dev_err(udc->dev, "The receive frame with error!\n");
875 }
876
877 /* note: don't clear the rxbd's buffer address */
878 recycle_one_rxbd(ep);
879
880 /* Get next BD */
881 if (bdstatus & R_W)
882 bd = ep->rxbase;
883 else
884 bd++;
885
886 bdstatus = in_be32((u32 __iomem *)bd);
887 length = bdstatus & BD_LENGTH_MASK;
888
889 }
890
891 ep->n_rxbd = bd;
892
893 return 0;
894 }
895
896 static int qe_ep_rxframe_handle(struct qe_ep *ep)
897 {
898 struct qe_frame *pframe;
899 u8 framepid = 0;
900 unsigned int fsize;
901 u8 *cp;
902 struct qe_req *req;
903
904 pframe = ep->rxframe;
905
906 if (frame_get_info(pframe) & PID_DATA1)
907 framepid = 0x1;
908
909 if (framepid != ep->data01) {
910 dev_err(ep->udc->dev, "the data01 error!\n");
911 return -EIO;
912 }
913
914 fsize = frame_get_length(pframe);
915 if (list_empty(&ep->queue)) {
916 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
917 } else {
918 req = list_entry(ep->queue.next, struct qe_req, queue);
919
920 cp = (u8 *)(req->req.buf) + req->req.actual;
921 if (cp) {
922 memcpy(cp, pframe->data, fsize);
923 req->req.actual += fsize;
924 if ((fsize < ep->ep.maxpacket) ||
925 (req->req.actual >= req->req.length)) {
926 if (ep->epnum == 0)
927 ep0_req_complete(ep->udc, req);
928 else
929 done(ep, req, 0);
930 if (list_empty(&ep->queue) && ep->epnum != 0)
931 qe_eprx_nack(ep);
932 }
933 }
934 }
935
936 qe_ep_toggledata01(ep);
937
938 return 0;
939 }
940
941 static void ep_rx_tasklet(unsigned long data)
942 {
943 struct qe_udc *udc = (struct qe_udc *)data;
944 struct qe_ep *ep;
945 struct qe_frame *pframe;
946 struct qe_bd __iomem *bd;
947 unsigned long flags;
948 u32 bdstatus, length;
949 u32 vaddr, i;
950
951 spin_lock_irqsave(&udc->lock, flags);
952
953 for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
954 ep = &udc->eps[i];
955
956 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
957 dev_dbg(udc->dev,
958 "This is a transmit ep or disable tasklet!\n");
959 continue;
960 }
961
962 pframe = ep->rxframe;
963 bd = ep->n_rxbd;
964 bdstatus = in_be32((u32 __iomem *)bd);
965 length = bdstatus & BD_LENGTH_MASK;
966
967 while (!(bdstatus & R_E) && length) {
968 if (list_empty(&ep->queue)) {
969 qe_eprx_nack(ep);
970 dev_dbg(udc->dev,
971 "The rxep have noreq %d\n",
972 ep->has_data);
973 break;
974 }
975
976 if ((bdstatus & R_F) && (bdstatus & R_L)
977 && !(bdstatus & R_ERROR)) {
978 qe_frame_clean(pframe);
979 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
980 frame_set_data(pframe, (u8 *)vaddr);
981 frame_set_length(pframe,
982 (length - USB_CRC_SIZE));
983 frame_set_status(pframe, FRAME_OK);
984 switch (bdstatus & R_PID) {
985 case R_PID_DATA1:
986 frame_set_info(pframe, PID_DATA1);
987 break;
988 case R_PID_SETUP:
989 frame_set_info(pframe, PID_SETUP);
990 break;
991 default:
992 frame_set_info(pframe, PID_DATA0);
993 break;
994 }
995 /* handle the rx frame */
996 qe_ep_rxframe_handle(ep);
997 } else {
998 dev_err(udc->dev,
999 "error in received frame\n");
1000 }
1001 /* note: don't clear the rxbd's buffer address */
1002 /*clear the length */
1003 out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1004 ep->has_data--;
1005 if (!(ep->localnack))
1006 recycle_one_rxbd(ep);
1007
1008 /* Get next BD */
1009 if (bdstatus & R_W)
1010 bd = ep->rxbase;
1011 else
1012 bd++;
1013
1014 bdstatus = in_be32((u32 __iomem *)bd);
1015 length = bdstatus & BD_LENGTH_MASK;
1016 }
1017
1018 ep->n_rxbd = bd;
1019
1020 if (ep->localnack)
1021 ep_recycle_rxbds(ep);
1022
1023 ep->enable_tasklet = 0;
1024 } /* for i=1 */
1025
1026 spin_unlock_irqrestore(&udc->lock, flags);
1027 }
1028
1029 static int qe_ep_rx(struct qe_ep *ep)
1030 {
1031 struct qe_udc *udc;
1032 struct qe_frame *pframe;
1033 struct qe_bd __iomem *bd;
1034 u16 swoffs, ucoffs, emptybds;
1035
1036 udc = ep->udc;
1037 pframe = ep->rxframe;
1038
1039 if (ep->dir == USB_DIR_IN) {
1040 dev_err(udc->dev, "transmit ep in rx function\n");
1041 return -EINVAL;
1042 }
1043
1044 bd = ep->n_rxbd;
1045
1046 swoffs = (u16)(bd - ep->rxbase);
1047 ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1048 in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1049 if (swoffs < ucoffs)
1050 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1051 else
1052 emptybds = swoffs - ucoffs;
1053
1054 if (emptybds < MIN_EMPTY_BDS) {
1055 qe_eprx_nack(ep);
1056 ep->localnack = 1;
1057 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1058 }
1059 ep->has_data = USB_BDRING_LEN_RX - emptybds;
1060
1061 if (list_empty(&ep->queue)) {
1062 qe_eprx_nack(ep);
1063 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1064 ep->has_data);
1065 return 0;
1066 }
1067
1068 tasklet_schedule(&udc->rx_tasklet);
1069 ep->enable_tasklet = 1;
1070
1071 return 0;
1072 }
1073
1074 /* send data from a frame, no matter what tx_req */
1075 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1076 {
1077 struct qe_udc *udc = ep->udc;
1078 struct qe_bd __iomem *bd;
1079 u16 saveusbmr;
1080 u32 bdstatus, pidmask;
1081 u32 paddr;
1082
1083 if (ep->dir == USB_DIR_OUT) {
1084 dev_err(udc->dev, "receive ep passed to tx function\n");
1085 return -EINVAL;
1086 }
1087
1088 /* Disable the Tx interrupt */
1089 saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1090 out_be16(&udc->usb_regs->usb_usbmr,
1091 saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1092
1093 bd = ep->n_txbd;
1094 bdstatus = in_be32((u32 __iomem *)bd);
1095
1096 if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1097 if (frame_get_length(frame) == 0) {
1098 frame_set_data(frame, udc->nullbuf);
1099 frame_set_length(frame, 2);
1100 frame->info |= (ZLP | NO_CRC);
1101 dev_vdbg(udc->dev, "the frame size = 0\n");
1102 }
1103 paddr = virt_to_phys((void *)frame->data);
1104 out_be32(&bd->buf, paddr);
1105 bdstatus = (bdstatus&T_W);
1106 if (!(frame_get_info(frame) & NO_CRC))
1107 bdstatus |= T_R | T_I | T_L | T_TC
1108 | frame_get_length(frame);
1109 else
1110 bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1111
1112 /* if the packet is a ZLP in status phase */
1113 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1114 ep->data01 = 0x1;
1115
1116 if (ep->data01) {
1117 pidmask = T_PID_DATA1;
1118 frame->info |= PID_DATA1;
1119 } else {
1120 pidmask = T_PID_DATA0;
1121 frame->info |= PID_DATA0;
1122 }
1123 bdstatus |= T_CNF;
1124 bdstatus |= pidmask;
1125 out_be32((u32 __iomem *)bd, bdstatus);
1126 qe_ep_filltxfifo(ep);
1127
1128 /* enable the TX interrupt */
1129 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1130
1131 qe_ep_toggledata01(ep);
1132 if (bdstatus & T_W)
1133 ep->n_txbd = ep->txbase;
1134 else
1135 ep->n_txbd++;
1136
1137 return 0;
1138 } else {
1139 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1140 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1141 return -EBUSY;
1142 }
1143 }
1144
1145 /* when a bd was transmitted, the function can
1146 * handle the tx_req, not include ep0 */
1147 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1148 {
1149 if (ep->tx_req != NULL) {
1150 if (!restart) {
1151 int asent = ep->last;
1152 ep->sent += asent;
1153 ep->last -= asent;
1154 } else {
1155 ep->last = 0;
1156 }
1157
1158 /* a request already were transmitted completely */
1159 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1160 ep->tx_req->req.actual = (unsigned int)ep->sent;
1161 done(ep, ep->tx_req, 0);
1162 ep->tx_req = NULL;
1163 ep->last = 0;
1164 ep->sent = 0;
1165 }
1166 }
1167
1168 /* we should gain a new tx_req fot this endpoint */
1169 if (ep->tx_req == NULL) {
1170 if (!list_empty(&ep->queue)) {
1171 ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1172 queue);
1173 ep->last = 0;
1174 ep->sent = 0;
1175 }
1176 }
1177
1178 return 0;
1179 }
1180
1181 /* give a frame and a tx_req, send some data */
1182 static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1183 {
1184 unsigned int size;
1185 u8 *buf;
1186
1187 qe_frame_clean(frame);
1188 size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1189 ep->ep.maxpacket);
1190 buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1191 if (buf && size) {
1192 ep->last = size;
1193 frame_set_data(frame, buf);
1194 frame_set_length(frame, size);
1195 frame_set_status(frame, FRAME_OK);
1196 frame_set_info(frame, 0);
1197 return qe_ep_tx(ep, frame);
1198 }
1199 return -EIO;
1200 }
1201
1202 /* give a frame struct,send a ZLP */
1203 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1204 {
1205 struct qe_udc *udc = ep->udc;
1206
1207 if (frame == NULL)
1208 return -ENODEV;
1209
1210 qe_frame_clean(frame);
1211 frame_set_data(frame, (u8 *)udc->nullbuf);
1212 frame_set_length(frame, 2);
1213 frame_set_status(frame, FRAME_OK);
1214 frame_set_info(frame, (ZLP | NO_CRC | infor));
1215
1216 return qe_ep_tx(ep, frame);
1217 }
1218
1219 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1220 {
1221 struct qe_req *req = ep->tx_req;
1222 int reval;
1223
1224 if (req == NULL)
1225 return -ENODEV;
1226
1227 if ((req->req.length - ep->sent) > 0)
1228 reval = qe_usb_senddata(ep, frame);
1229 else
1230 reval = sendnulldata(ep, frame, 0);
1231
1232 return reval;
1233 }
1234
1235 /* if direction is DIR_IN, the status is Device->Host
1236 * if direction is DIR_OUT, the status transaction is Device<-Host
1237 * in status phase, udc create a request and gain status */
1238 static int ep0_prime_status(struct qe_udc *udc, int direction)
1239 {
1240
1241 struct qe_ep *ep = &udc->eps[0];
1242
1243 if (direction == USB_DIR_IN) {
1244 udc->ep0_state = DATA_STATE_NEED_ZLP;
1245 udc->ep0_dir = USB_DIR_IN;
1246 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1247 } else {
1248 udc->ep0_dir = USB_DIR_OUT;
1249 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1250 }
1251
1252 return 0;
1253 }
1254
1255 /* a request complete in ep0, whether gadget request or udc request */
1256 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1257 {
1258 struct qe_ep *ep = &udc->eps[0];
1259 /* because usb and ep's status already been set in ch9setaddress() */
1260
1261 switch (udc->ep0_state) {
1262 case DATA_STATE_XMIT:
1263 done(ep, req, 0);
1264 /* receive status phase */
1265 if (ep0_prime_status(udc, USB_DIR_OUT))
1266 qe_ep0_stall(udc);
1267 break;
1268
1269 case DATA_STATE_NEED_ZLP:
1270 done(ep, req, 0);
1271 udc->ep0_state = WAIT_FOR_SETUP;
1272 break;
1273
1274 case DATA_STATE_RECV:
1275 done(ep, req, 0);
1276 /* send status phase */
1277 if (ep0_prime_status(udc, USB_DIR_IN))
1278 qe_ep0_stall(udc);
1279 break;
1280
1281 case WAIT_FOR_OUT_STATUS:
1282 done(ep, req, 0);
1283 udc->ep0_state = WAIT_FOR_SETUP;
1284 break;
1285
1286 case WAIT_FOR_SETUP:
1287 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1288 break;
1289
1290 default:
1291 qe_ep0_stall(udc);
1292 break;
1293 }
1294 }
1295
1296 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1297 {
1298 struct qe_req *tx_req = NULL;
1299 struct qe_frame *frame = ep->txframe;
1300
1301 if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1302 if (!restart)
1303 ep->udc->ep0_state = WAIT_FOR_SETUP;
1304 else
1305 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1306 return 0;
1307 }
1308
1309 tx_req = ep->tx_req;
1310 if (tx_req != NULL) {
1311 if (!restart) {
1312 int asent = ep->last;
1313 ep->sent += asent;
1314 ep->last -= asent;
1315 } else {
1316 ep->last = 0;
1317 }
1318
1319 /* a request already were transmitted completely */
1320 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1321 ep->tx_req->req.actual = (unsigned int)ep->sent;
1322 ep0_req_complete(ep->udc, ep->tx_req);
1323 ep->tx_req = NULL;
1324 ep->last = 0;
1325 ep->sent = 0;
1326 }
1327 } else {
1328 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1329 }
1330
1331 return 0;
1332 }
1333
1334 static int ep0_txframe_handle(struct qe_ep *ep)
1335 {
1336 /* if have error, transmit again */
1337 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1338 qe_ep_flushtxfifo(ep);
1339 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1340 if (frame_get_info(ep->txframe) & PID_DATA0)
1341 ep->data01 = 0;
1342 else
1343 ep->data01 = 1;
1344
1345 ep0_txcomplete(ep, 1);
1346 } else
1347 ep0_txcomplete(ep, 0);
1348
1349 frame_create_tx(ep, ep->txframe);
1350 return 0;
1351 }
1352
1353 static int qe_ep0_txconf(struct qe_ep *ep)
1354 {
1355 struct qe_bd __iomem *bd;
1356 struct qe_frame *pframe;
1357 u32 bdstatus;
1358
1359 bd = ep->c_txbd;
1360 bdstatus = in_be32((u32 __iomem *)bd);
1361 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1362 pframe = ep->txframe;
1363
1364 /* clear and recycle the BD */
1365 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1366 out_be32(&bd->buf, 0);
1367 if (bdstatus & T_W)
1368 ep->c_txbd = ep->txbase;
1369 else
1370 ep->c_txbd++;
1371
1372 if (ep->c_txbd == ep->n_txbd) {
1373 if (bdstatus & DEVICE_T_ERROR) {
1374 frame_set_status(pframe, FRAME_ERROR);
1375 if (bdstatus & T_TO)
1376 pframe->status |= TX_ER_TIMEOUT;
1377 if (bdstatus & T_UN)
1378 pframe->status |= TX_ER_UNDERUN;
1379 }
1380 ep0_txframe_handle(ep);
1381 }
1382
1383 bd = ep->c_txbd;
1384 bdstatus = in_be32((u32 __iomem *)bd);
1385 }
1386
1387 return 0;
1388 }
1389
1390 static int ep_txframe_handle(struct qe_ep *ep)
1391 {
1392 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1393 qe_ep_flushtxfifo(ep);
1394 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1395 if (frame_get_info(ep->txframe) & PID_DATA0)
1396 ep->data01 = 0;
1397 else
1398 ep->data01 = 1;
1399
1400 txcomplete(ep, 1);
1401 } else
1402 txcomplete(ep, 0);
1403
1404 frame_create_tx(ep, ep->txframe); /* send the data */
1405 return 0;
1406 }
1407
1408 /* confirm the already trainsmited bd */
1409 static int qe_ep_txconf(struct qe_ep *ep)
1410 {
1411 struct qe_bd __iomem *bd;
1412 struct qe_frame *pframe = NULL;
1413 u32 bdstatus;
1414 unsigned char breakonrxinterrupt = 0;
1415
1416 bd = ep->c_txbd;
1417 bdstatus = in_be32((u32 __iomem *)bd);
1418 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1419 pframe = ep->txframe;
1420 if (bdstatus & DEVICE_T_ERROR) {
1421 frame_set_status(pframe, FRAME_ERROR);
1422 if (bdstatus & T_TO)
1423 pframe->status |= TX_ER_TIMEOUT;
1424 if (bdstatus & T_UN)
1425 pframe->status |= TX_ER_UNDERUN;
1426 }
1427
1428 /* clear and recycle the BD */
1429 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1430 out_be32(&bd->buf, 0);
1431 if (bdstatus & T_W)
1432 ep->c_txbd = ep->txbase;
1433 else
1434 ep->c_txbd++;
1435
1436 /* handle the tx frame */
1437 ep_txframe_handle(ep);
1438 bd = ep->c_txbd;
1439 bdstatus = in_be32((u32 __iomem *)bd);
1440 }
1441 if (breakonrxinterrupt)
1442 return -EIO;
1443 else
1444 return 0;
1445 }
1446
1447 /* Add a request in queue, and try to transmit a packet */
1448 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1449 {
1450 int reval = 0;
1451
1452 if (ep->tx_req == NULL) {
1453 ep->sent = 0;
1454 ep->last = 0;
1455 txcomplete(ep, 0); /* can gain a new tx_req */
1456 reval = frame_create_tx(ep, ep->txframe);
1457 }
1458 return reval;
1459 }
1460
1461 /* Maybe this is a good ideal */
1462 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1463 {
1464 struct qe_udc *udc = ep->udc;
1465 struct qe_frame *pframe = NULL;
1466 struct qe_bd __iomem *bd;
1467 u32 bdstatus, length;
1468 u32 vaddr, fsize;
1469 u8 *cp;
1470 u8 finish_req = 0;
1471 u8 framepid;
1472
1473 if (list_empty(&ep->queue)) {
1474 dev_vdbg(udc->dev, "the req already finish!\n");
1475 return 0;
1476 }
1477 pframe = ep->rxframe;
1478
1479 bd = ep->n_rxbd;
1480 bdstatus = in_be32((u32 __iomem *)bd);
1481 length = bdstatus & BD_LENGTH_MASK;
1482
1483 while (!(bdstatus & R_E) && length) {
1484 if (finish_req)
1485 break;
1486 if ((bdstatus & R_F) && (bdstatus & R_L)
1487 && !(bdstatus & R_ERROR)) {
1488 qe_frame_clean(pframe);
1489 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1490 frame_set_data(pframe, (u8 *)vaddr);
1491 frame_set_length(pframe, (length - USB_CRC_SIZE));
1492 frame_set_status(pframe, FRAME_OK);
1493 switch (bdstatus & R_PID) {
1494 case R_PID_DATA1:
1495 frame_set_info(pframe, PID_DATA1); break;
1496 default:
1497 frame_set_info(pframe, PID_DATA0); break;
1498 }
1499 /* handle the rx frame */
1500
1501 if (frame_get_info(pframe) & PID_DATA1)
1502 framepid = 0x1;
1503 else
1504 framepid = 0;
1505
1506 if (framepid != ep->data01) {
1507 dev_vdbg(udc->dev, "the data01 error!\n");
1508 } else {
1509 fsize = frame_get_length(pframe);
1510
1511 cp = (u8 *)(req->req.buf) + req->req.actual;
1512 if (cp) {
1513 memcpy(cp, pframe->data, fsize);
1514 req->req.actual += fsize;
1515 if ((fsize < ep->ep.maxpacket)
1516 || (req->req.actual >=
1517 req->req.length)) {
1518 finish_req = 1;
1519 done(ep, req, 0);
1520 if (list_empty(&ep->queue))
1521 qe_eprx_nack(ep);
1522 }
1523 }
1524 qe_ep_toggledata01(ep);
1525 }
1526 } else {
1527 dev_err(udc->dev, "The receive frame with error!\n");
1528 }
1529
1530 /* note: don't clear the rxbd's buffer address *
1531 * only Clear the length */
1532 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1533 ep->has_data--;
1534
1535 /* Get next BD */
1536 if (bdstatus & R_W)
1537 bd = ep->rxbase;
1538 else
1539 bd++;
1540
1541 bdstatus = in_be32((u32 __iomem *)bd);
1542 length = bdstatus & BD_LENGTH_MASK;
1543 }
1544
1545 ep->n_rxbd = bd;
1546 ep_recycle_rxbds(ep);
1547
1548 return 0;
1549 }
1550
1551 /* only add the request in queue */
1552 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1553 {
1554 if (ep->state == EP_STATE_NACK) {
1555 if (ep->has_data <= 0) {
1556 /* Enable rx and unmask rx interrupt */
1557 qe_eprx_normal(ep);
1558 } else {
1559 /* Copy the exist BD data */
1560 ep_req_rx(ep, req);
1561 }
1562 }
1563
1564 return 0;
1565 }
1566
1567 /********************************************************************
1568 Internal Used Function End
1569 ********************************************************************/
1570
1571 /*-----------------------------------------------------------------------
1572 Endpoint Management Functions For Gadget
1573 -----------------------------------------------------------------------*/
1574 static int qe_ep_enable(struct usb_ep *_ep,
1575 const struct usb_endpoint_descriptor *desc)
1576 {
1577 struct qe_udc *udc;
1578 struct qe_ep *ep;
1579 int retval = 0;
1580 unsigned char epnum;
1581
1582 ep = container_of(_ep, struct qe_ep, ep);
1583
1584 /* catch various bogus parameters */
1585 if (!_ep || !desc || ep->desc || _ep->name == ep_name[0] ||
1586 (desc->bDescriptorType != USB_DT_ENDPOINT))
1587 return -EINVAL;
1588
1589 udc = ep->udc;
1590 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1591 return -ESHUTDOWN;
1592
1593 epnum = (u8)desc->bEndpointAddress & 0xF;
1594
1595 retval = qe_ep_init(udc, epnum, desc);
1596 if (retval != 0) {
1597 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1598 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1599 return -EINVAL;
1600 }
1601 dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1602 return 0;
1603 }
1604
1605 static int qe_ep_disable(struct usb_ep *_ep)
1606 {
1607 struct qe_udc *udc;
1608 struct qe_ep *ep;
1609 unsigned long flags;
1610 unsigned int size;
1611
1612 ep = container_of(_ep, struct qe_ep, ep);
1613 udc = ep->udc;
1614
1615 if (!_ep || !ep->desc) {
1616 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1617 return -EINVAL;
1618 }
1619
1620 spin_lock_irqsave(&udc->lock, flags);
1621 /* Nuke all pending requests (does flush) */
1622 nuke(ep, -ESHUTDOWN);
1623 ep->desc = NULL;
1624 ep->stopped = 1;
1625 spin_unlock_irqrestore(&udc->lock, flags);
1626
1627 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1628
1629 if (ep->dir == USB_DIR_OUT)
1630 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1631 (USB_BDRING_LEN_RX + 1);
1632 else
1633 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1634 (USB_BDRING_LEN + 1);
1635
1636 if (ep->dir != USB_DIR_IN) {
1637 kfree(ep->rxframe);
1638 if (ep->rxbufmap) {
1639 dma_unmap_single(udc_controller->gadget.dev.parent,
1640 ep->rxbuf_d, size,
1641 DMA_FROM_DEVICE);
1642 ep->rxbuf_d = DMA_ADDR_INVALID;
1643 } else {
1644 dma_sync_single_for_cpu(
1645 udc_controller->gadget.dev.parent,
1646 ep->rxbuf_d, size,
1647 DMA_FROM_DEVICE);
1648 }
1649 kfree(ep->rxbuffer);
1650 }
1651
1652 if (ep->dir != USB_DIR_OUT)
1653 kfree(ep->txframe);
1654
1655 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1656 return 0;
1657 }
1658
1659 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1660 {
1661 struct qe_req *req;
1662
1663 req = kzalloc(sizeof(*req), gfp_flags);
1664 if (!req)
1665 return NULL;
1666
1667 req->req.dma = DMA_ADDR_INVALID;
1668
1669 INIT_LIST_HEAD(&req->queue);
1670
1671 return &req->req;
1672 }
1673
1674 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1675 {
1676 struct qe_req *req;
1677
1678 req = container_of(_req, struct qe_req, req);
1679
1680 if (_req)
1681 kfree(req);
1682 }
1683
1684 /* queues (submits) an I/O request to an endpoint */
1685 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1686 gfp_t gfp_flags)
1687 {
1688 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1689 struct qe_req *req = container_of(_req, struct qe_req, req);
1690 struct qe_udc *udc;
1691 unsigned long flags;
1692 int reval;
1693
1694 udc = ep->udc;
1695 /* catch various bogus parameters */
1696 if (!_req || !req->req.complete || !req->req.buf
1697 || !list_empty(&req->queue)) {
1698 dev_dbg(udc->dev, "bad params\n");
1699 return -EINVAL;
1700 }
1701 if (!_ep || (!ep->desc && ep_index(ep))) {
1702 dev_dbg(udc->dev, "bad ep\n");
1703 return -EINVAL;
1704 }
1705
1706 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1707 return -ESHUTDOWN;
1708
1709 req->ep = ep;
1710
1711 /* map virtual address to hardware */
1712 if (req->req.dma == DMA_ADDR_INVALID) {
1713 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1714 req->req.buf,
1715 req->req.length,
1716 ep_is_in(ep)
1717 ? DMA_TO_DEVICE :
1718 DMA_FROM_DEVICE);
1719 req->mapped = 1;
1720 } else {
1721 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1722 req->req.dma, req->req.length,
1723 ep_is_in(ep)
1724 ? DMA_TO_DEVICE :
1725 DMA_FROM_DEVICE);
1726 req->mapped = 0;
1727 }
1728
1729 req->req.status = -EINPROGRESS;
1730 req->req.actual = 0;
1731
1732 list_add_tail(&req->queue, &ep->queue);
1733 dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1734 ep->name, req->req.length);
1735 spin_lock_irqsave(&udc->lock, flags);
1736 /* push the request to device */
1737 if (ep_is_in(ep))
1738 reval = ep_req_send(ep, req);
1739
1740 /* EP0 */
1741 if (ep_index(ep) == 0 && req->req.length > 0) {
1742 if (ep_is_in(ep))
1743 udc->ep0_state = DATA_STATE_XMIT;
1744 else
1745 udc->ep0_state = DATA_STATE_RECV;
1746 }
1747
1748 if (ep->dir == USB_DIR_OUT)
1749 reval = ep_req_receive(ep, req);
1750
1751 spin_unlock_irqrestore(&udc->lock, flags);
1752
1753 return 0;
1754 }
1755
1756 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1757 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1758 {
1759 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1760 struct qe_req *req;
1761 unsigned long flags;
1762
1763 if (!_ep || !_req)
1764 return -EINVAL;
1765
1766 spin_lock_irqsave(&ep->udc->lock, flags);
1767
1768 /* make sure it's actually queued on this endpoint */
1769 list_for_each_entry(req, &ep->queue, queue) {
1770 if (&req->req == _req)
1771 break;
1772 }
1773
1774 if (&req->req != _req) {
1775 spin_unlock_irqrestore(&ep->udc->lock, flags);
1776 return -EINVAL;
1777 }
1778
1779 done(ep, req, -ECONNRESET);
1780
1781 spin_unlock_irqrestore(&ep->udc->lock, flags);
1782 return 0;
1783 }
1784
1785 /*-----------------------------------------------------------------
1786 * modify the endpoint halt feature
1787 * @ep: the non-isochronous endpoint being stalled
1788 * @value: 1--set halt 0--clear halt
1789 * Returns zero, or a negative error code.
1790 *----------------------------------------------------------------*/
1791 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1792 {
1793 struct qe_ep *ep;
1794 unsigned long flags;
1795 int status = -EOPNOTSUPP;
1796 struct qe_udc *udc;
1797
1798 ep = container_of(_ep, struct qe_ep, ep);
1799 if (!_ep || !ep->desc) {
1800 status = -EINVAL;
1801 goto out;
1802 }
1803
1804 udc = ep->udc;
1805 /* Attempt to halt IN ep will fail if any transfer requests
1806 * are still queue */
1807 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1808 status = -EAGAIN;
1809 goto out;
1810 }
1811
1812 status = 0;
1813 spin_lock_irqsave(&ep->udc->lock, flags);
1814 qe_eptx_stall_change(ep, value);
1815 qe_eprx_stall_change(ep, value);
1816 spin_unlock_irqrestore(&ep->udc->lock, flags);
1817
1818 if (ep->epnum == 0) {
1819 udc->ep0_state = WAIT_FOR_SETUP;
1820 udc->ep0_dir = 0;
1821 }
1822
1823 /* set data toggle to DATA0 on clear halt */
1824 if (value == 0)
1825 ep->data01 = 0;
1826 out:
1827 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1828 value ? "set" : "clear", status);
1829
1830 return status;
1831 }
1832
1833 static struct usb_ep_ops qe_ep_ops = {
1834 .enable = qe_ep_enable,
1835 .disable = qe_ep_disable,
1836
1837 .alloc_request = qe_alloc_request,
1838 .free_request = qe_free_request,
1839
1840 .queue = qe_ep_queue,
1841 .dequeue = qe_ep_dequeue,
1842
1843 .set_halt = qe_ep_set_halt,
1844 };
1845
1846 /*------------------------------------------------------------------------
1847 Gadget Driver Layer Operations
1848 ------------------------------------------------------------------------*/
1849
1850 /* Get the current frame number */
1851 static int qe_get_frame(struct usb_gadget *gadget)
1852 {
1853 u16 tmp;
1854
1855 tmp = in_be16(&udc_controller->usb_param->frame_n);
1856 if (tmp & 0x8000)
1857 tmp = tmp & 0x07ff;
1858 else
1859 tmp = -EINVAL;
1860
1861 return (int)tmp;
1862 }
1863
1864 /* Tries to wake up the host connected to this gadget
1865 *
1866 * Return : 0-success
1867 * Negative-this feature not enabled by host or not supported by device hw
1868 */
1869 static int qe_wakeup(struct usb_gadget *gadget)
1870 {
1871 return -ENOTSUPP;
1872 }
1873
1874 /* Notify controller that VBUS is powered, Called by whatever
1875 detects VBUS sessions */
1876 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1877 {
1878 return -ENOTSUPP;
1879 }
1880
1881 /* constrain controller's VBUS power usage
1882 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1883 * reporting how much power the device may consume. For example, this
1884 * could affect how quickly batteries are recharged.
1885 *
1886 * Returns zero on success, else negative errno.
1887 */
1888 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1889 {
1890 return -ENOTSUPP;
1891 }
1892
1893 /* Change Data+ pullup status
1894 * this func is used by usb_gadget_connect/disconnect
1895 */
1896 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1897 {
1898 return -ENOTSUPP;
1899 }
1900
1901 /* defined in usb_gadget.h */
1902 static struct usb_gadget_ops qe_gadget_ops = {
1903 .get_frame = qe_get_frame,
1904 .wakeup = qe_wakeup,
1905 /* .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1906 .vbus_session = qe_vbus_session,
1907 .vbus_draw = qe_vbus_draw,
1908 .pullup = qe_pullup,
1909 };
1910
1911 /*-------------------------------------------------------------------------
1912 USB ep0 Setup process in BUS Enumeration
1913 -------------------------------------------------------------------------*/
1914 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1915 {
1916 struct qe_ep *ep = &udc->eps[pipe];
1917
1918 nuke(ep, -ECONNRESET);
1919 ep->tx_req = NULL;
1920 return 0;
1921 }
1922
1923 static int reset_queues(struct qe_udc *udc)
1924 {
1925 u8 pipe;
1926
1927 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1928 udc_reset_ep_queue(udc, pipe);
1929
1930 /* report disconnect; the driver is already quiesced */
1931 spin_unlock(&udc->lock);
1932 udc->driver->disconnect(&udc->gadget);
1933 spin_lock(&udc->lock);
1934
1935 return 0;
1936 }
1937
1938 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1939 u16 length)
1940 {
1941 /* Save the new address to device struct */
1942 udc->device_address = (u8) value;
1943 /* Update usb state */
1944 udc->usb_state = USB_STATE_ADDRESS;
1945
1946 /* Status phase , send a ZLP */
1947 if (ep0_prime_status(udc, USB_DIR_IN))
1948 qe_ep0_stall(udc);
1949 }
1950
1951 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1952 {
1953 struct qe_req *req = container_of(_req, struct qe_req, req);
1954
1955 req->req.buf = NULL;
1956 kfree(req);
1957 }
1958
1959 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1960 u16 index, u16 length)
1961 {
1962 u16 usb_status = 0;
1963 struct qe_req *req;
1964 struct qe_ep *ep;
1965 int status = 0;
1966
1967 ep = &udc->eps[0];
1968 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1969 /* Get device status */
1970 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1971 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1972 /* Get interface status */
1973 /* We don't have interface information in udc driver */
1974 usb_status = 0;
1975 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1976 /* Get endpoint status */
1977 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1978 struct qe_ep *target_ep = &udc->eps[pipe];
1979 u16 usep;
1980
1981 /* stall if endpoint doesn't exist */
1982 if (!target_ep->desc)
1983 goto stall;
1984
1985 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1986 if (index & USB_DIR_IN) {
1987 if (target_ep->dir != USB_DIR_IN)
1988 goto stall;
1989 if ((usep & USB_THS_MASK) == USB_THS_STALL)
1990 usb_status = 1 << USB_ENDPOINT_HALT;
1991 } else {
1992 if (target_ep->dir != USB_DIR_OUT)
1993 goto stall;
1994 if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
1995 usb_status = 1 << USB_ENDPOINT_HALT;
1996 }
1997 }
1998
1999 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2000 struct qe_req, req);
2001 req->req.length = 2;
2002 req->req.buf = udc->statusbuf;
2003 *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2004 req->req.status = -EINPROGRESS;
2005 req->req.actual = 0;
2006 req->req.complete = ownercomplete;
2007
2008 udc->ep0_dir = USB_DIR_IN;
2009
2010 /* data phase */
2011 status = qe_ep_queue(&ep->ep, &req->req, GFP_ATOMIC);
2012
2013 if (status == 0)
2014 return;
2015 stall:
2016 dev_err(udc->dev, "Can't respond to getstatus request \n");
2017 qe_ep0_stall(udc);
2018 }
2019
2020 /* only handle the setup request, suppose the device in normal status */
2021 static void setup_received_handle(struct qe_udc *udc,
2022 struct usb_ctrlrequest *setup)
2023 {
2024 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2025 u16 wValue = le16_to_cpu(setup->wValue);
2026 u16 wIndex = le16_to_cpu(setup->wIndex);
2027 u16 wLength = le16_to_cpu(setup->wLength);
2028
2029 /* clear the previous request in the ep0 */
2030 udc_reset_ep_queue(udc, 0);
2031
2032 if (setup->bRequestType & USB_DIR_IN)
2033 udc->ep0_dir = USB_DIR_IN;
2034 else
2035 udc->ep0_dir = USB_DIR_OUT;
2036
2037 switch (setup->bRequest) {
2038 case USB_REQ_GET_STATUS:
2039 /* Data+Status phase form udc */
2040 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2041 != (USB_DIR_IN | USB_TYPE_STANDARD))
2042 break;
2043 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2044 wLength);
2045 return;
2046
2047 case USB_REQ_SET_ADDRESS:
2048 /* Status phase from udc */
2049 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2050 USB_RECIP_DEVICE))
2051 break;
2052 ch9setaddress(udc, wValue, wIndex, wLength);
2053 return;
2054
2055 case USB_REQ_CLEAR_FEATURE:
2056 case USB_REQ_SET_FEATURE:
2057 /* Requests with no data phase, status phase from udc */
2058 if ((setup->bRequestType & USB_TYPE_MASK)
2059 != USB_TYPE_STANDARD)
2060 break;
2061
2062 if ((setup->bRequestType & USB_RECIP_MASK)
2063 == USB_RECIP_ENDPOINT) {
2064 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2065 struct qe_ep *ep;
2066
2067 if (wValue != 0 || wLength != 0
2068 || pipe > USB_MAX_ENDPOINTS)
2069 break;
2070 ep = &udc->eps[pipe];
2071
2072 spin_unlock(&udc->lock);
2073 qe_ep_set_halt(&ep->ep,
2074 (setup->bRequest == USB_REQ_SET_FEATURE)
2075 ? 1 : 0);
2076 spin_lock(&udc->lock);
2077 }
2078
2079 ep0_prime_status(udc, USB_DIR_IN);
2080
2081 return;
2082
2083 default:
2084 break;
2085 }
2086
2087 if (wLength) {
2088 /* Data phase from gadget, status phase from udc */
2089 if (setup->bRequestType & USB_DIR_IN) {
2090 udc->ep0_state = DATA_STATE_XMIT;
2091 udc->ep0_dir = USB_DIR_IN;
2092 } else {
2093 udc->ep0_state = DATA_STATE_RECV;
2094 udc->ep0_dir = USB_DIR_OUT;
2095 }
2096 spin_unlock(&udc->lock);
2097 if (udc->driver->setup(&udc->gadget,
2098 &udc->local_setup_buff) < 0)
2099 qe_ep0_stall(udc);
2100 spin_lock(&udc->lock);
2101 } else {
2102 /* No data phase, IN status from gadget */
2103 udc->ep0_dir = USB_DIR_IN;
2104 spin_unlock(&udc->lock);
2105 if (udc->driver->setup(&udc->gadget,
2106 &udc->local_setup_buff) < 0)
2107 qe_ep0_stall(udc);
2108 spin_lock(&udc->lock);
2109 udc->ep0_state = DATA_STATE_NEED_ZLP;
2110 }
2111 }
2112
2113 /*-------------------------------------------------------------------------
2114 USB Interrupt handlers
2115 -------------------------------------------------------------------------*/
2116 static void suspend_irq(struct qe_udc *udc)
2117 {
2118 udc->resume_state = udc->usb_state;
2119 udc->usb_state = USB_STATE_SUSPENDED;
2120
2121 /* report suspend to the driver ,serial.c not support this*/
2122 if (udc->driver->suspend)
2123 udc->driver->suspend(&udc->gadget);
2124 }
2125
2126 static void resume_irq(struct qe_udc *udc)
2127 {
2128 udc->usb_state = udc->resume_state;
2129 udc->resume_state = 0;
2130
2131 /* report resume to the driver , serial.c not support this*/
2132 if (udc->driver->resume)
2133 udc->driver->resume(&udc->gadget);
2134 }
2135
2136 static void idle_irq(struct qe_udc *udc)
2137 {
2138 u8 usbs;
2139
2140 usbs = in_8(&udc->usb_regs->usb_usbs);
2141 if (usbs & USB_IDLE_STATUS_MASK) {
2142 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2143 suspend_irq(udc);
2144 } else {
2145 if (udc->usb_state == USB_STATE_SUSPENDED)
2146 resume_irq(udc);
2147 }
2148 }
2149
2150 static int reset_irq(struct qe_udc *udc)
2151 {
2152 unsigned char i;
2153
2154 qe_usb_disable();
2155 out_8(&udc->usb_regs->usb_usadr, 0);
2156
2157 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2158 if (udc->eps[i].init)
2159 qe_ep_reset(udc, i);
2160 }
2161
2162 reset_queues(udc);
2163 udc->usb_state = USB_STATE_DEFAULT;
2164 udc->ep0_state = WAIT_FOR_SETUP;
2165 udc->ep0_dir = USB_DIR_OUT;
2166 qe_usb_enable();
2167 return 0;
2168 }
2169
2170 static int bsy_irq(struct qe_udc *udc)
2171 {
2172 return 0;
2173 }
2174
2175 static int txe_irq(struct qe_udc *udc)
2176 {
2177 return 0;
2178 }
2179
2180 /* ep0 tx interrupt also in here */
2181 static int tx_irq(struct qe_udc *udc)
2182 {
2183 struct qe_ep *ep;
2184 struct qe_bd __iomem *bd;
2185 int i, res = 0;
2186
2187 if ((udc->usb_state == USB_STATE_ADDRESS)
2188 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2189 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2190
2191 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2192 ep = &udc->eps[i];
2193 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2194 bd = ep->c_txbd;
2195 if (!(in_be32((u32 __iomem *)bd) & T_R)
2196 && (in_be32(&bd->buf))) {
2197 /* confirm the transmitted bd */
2198 if (ep->epnum == 0)
2199 res = qe_ep0_txconf(ep);
2200 else
2201 res = qe_ep_txconf(ep);
2202 }
2203 }
2204 }
2205 return res;
2206 }
2207
2208
2209 /* setup packect's rx is handle in the function too */
2210 static void rx_irq(struct qe_udc *udc)
2211 {
2212 struct qe_ep *ep;
2213 struct qe_bd __iomem *bd;
2214 int i;
2215
2216 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2217 ep = &udc->eps[i];
2218 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2219 bd = ep->n_rxbd;
2220 if (!(in_be32((u32 __iomem *)bd) & R_E)
2221 && (in_be32(&bd->buf))) {
2222 if (ep->epnum == 0) {
2223 qe_ep0_rx(udc);
2224 } else {
2225 /*non-setup package receive*/
2226 qe_ep_rx(ep);
2227 }
2228 }
2229 }
2230 }
2231 }
2232
2233 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2234 {
2235 struct qe_udc *udc = (struct qe_udc *)_udc;
2236 u16 irq_src;
2237 irqreturn_t status = IRQ_NONE;
2238 unsigned long flags;
2239
2240 spin_lock_irqsave(&udc->lock, flags);
2241
2242 irq_src = in_be16(&udc->usb_regs->usb_usber) &
2243 in_be16(&udc->usb_regs->usb_usbmr);
2244 /* Clear notification bits */
2245 out_be16(&udc->usb_regs->usb_usber, irq_src);
2246 /* USB Interrupt */
2247 if (irq_src & USB_E_IDLE_MASK) {
2248 idle_irq(udc);
2249 irq_src &= ~USB_E_IDLE_MASK;
2250 status = IRQ_HANDLED;
2251 }
2252
2253 if (irq_src & USB_E_TXB_MASK) {
2254 tx_irq(udc);
2255 irq_src &= ~USB_E_TXB_MASK;
2256 status = IRQ_HANDLED;
2257 }
2258
2259 if (irq_src & USB_E_RXB_MASK) {
2260 rx_irq(udc);
2261 irq_src &= ~USB_E_RXB_MASK;
2262 status = IRQ_HANDLED;
2263 }
2264
2265 if (irq_src & USB_E_RESET_MASK) {
2266 reset_irq(udc);
2267 irq_src &= ~USB_E_RESET_MASK;
2268 status = IRQ_HANDLED;
2269 }
2270
2271 if (irq_src & USB_E_BSY_MASK) {
2272 bsy_irq(udc);
2273 irq_src &= ~USB_E_BSY_MASK;
2274 status = IRQ_HANDLED;
2275 }
2276
2277 if (irq_src & USB_E_TXE_MASK) {
2278 txe_irq(udc);
2279 irq_src &= ~USB_E_TXE_MASK;
2280 status = IRQ_HANDLED;
2281 }
2282
2283 spin_unlock_irqrestore(&udc->lock, flags);
2284
2285 return status;
2286 }
2287
2288 /*-------------------------------------------------------------------------
2289 Gadget driver register and unregister.
2290 --------------------------------------------------------------------------*/
2291 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2292 {
2293 int retval;
2294 unsigned long flags = 0;
2295
2296 /* standard operations */
2297 if (!udc_controller)
2298 return -ENODEV;
2299
2300 if (!driver || (driver->speed != USB_SPEED_FULL
2301 && driver->speed != USB_SPEED_HIGH)
2302 || !driver->bind || !driver->disconnect
2303 || !driver->setup)
2304 return -EINVAL;
2305
2306 if (udc_controller->driver)
2307 return -EBUSY;
2308
2309 /* lock is needed but whether should use this lock or another */
2310 spin_lock_irqsave(&udc_controller->lock, flags);
2311
2312 driver->driver.bus = NULL;
2313 /* hook up the driver */
2314 udc_controller->driver = driver;
2315 udc_controller->gadget.dev.driver = &driver->driver;
2316 udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2317 spin_unlock_irqrestore(&udc_controller->lock, flags);
2318
2319 retval = driver->bind(&udc_controller->gadget);
2320 if (retval) {
2321 dev_err(udc_controller->dev, "bind to %s --> %d",
2322 driver->driver.name, retval);
2323 udc_controller->gadget.dev.driver = NULL;
2324 udc_controller->driver = NULL;
2325 return retval;
2326 }
2327
2328 /* Enable IRQ reg and Set usbcmd reg EN bit */
2329 qe_usb_enable();
2330
2331 out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2332 out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2333 udc_controller->usb_state = USB_STATE_ATTACHED;
2334 udc_controller->ep0_state = WAIT_FOR_SETUP;
2335 udc_controller->ep0_dir = USB_DIR_OUT;
2336 dev_info(udc_controller->dev, "%s bind to driver %s \n",
2337 udc_controller->gadget.name, driver->driver.name);
2338 return 0;
2339 }
2340 EXPORT_SYMBOL(usb_gadget_register_driver);
2341
2342 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2343 {
2344 struct qe_ep *loop_ep;
2345 unsigned long flags;
2346
2347 if (!udc_controller)
2348 return -ENODEV;
2349
2350 if (!driver || driver != udc_controller->driver)
2351 return -EINVAL;
2352
2353 /* stop usb controller, disable intr */
2354 qe_usb_disable();
2355
2356 /* in fact, no needed */
2357 udc_controller->usb_state = USB_STATE_ATTACHED;
2358 udc_controller->ep0_state = WAIT_FOR_SETUP;
2359 udc_controller->ep0_dir = 0;
2360
2361 /* stand operation */
2362 spin_lock_irqsave(&udc_controller->lock, flags);
2363 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2364 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2365 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2366 ep.ep_list)
2367 nuke(loop_ep, -ESHUTDOWN);
2368 spin_unlock_irqrestore(&udc_controller->lock, flags);
2369
2370 /* report disconnect; the controller is already quiesced */
2371 driver->disconnect(&udc_controller->gadget);
2372
2373 /* unbind gadget and unhook driver. */
2374 driver->unbind(&udc_controller->gadget);
2375 udc_controller->gadget.dev.driver = NULL;
2376 udc_controller->driver = NULL;
2377
2378 dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2379 driver->driver.name);
2380 return 0;
2381 }
2382 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2383
2384 /* udc structure's alloc and setup, include ep-param alloc */
2385 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2386 {
2387 struct qe_udc *udc;
2388 struct device_node *np = ofdev->node;
2389 unsigned int tmp_addr = 0;
2390 struct usb_device_para __iomem *usbpram;
2391 unsigned int i;
2392 u64 size;
2393 u32 offset;
2394
2395 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2396 if (udc == NULL) {
2397 dev_err(&ofdev->dev, "malloc udc failed\n");
2398 goto cleanup;
2399 }
2400
2401 udc->dev = &ofdev->dev;
2402
2403 /* get default address of usb parameter in MURAM from device tree */
2404 offset = *of_get_address(np, 1, &size, NULL);
2405 udc->usb_param = cpm_muram_addr(offset);
2406 memset_io(udc->usb_param, 0, size);
2407
2408 usbpram = udc->usb_param;
2409 out_be16(&usbpram->frame_n, 0);
2410 out_be32(&usbpram->rstate, 0);
2411
2412 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2413 sizeof(struct usb_ep_para)),
2414 USB_EP_PARA_ALIGNMENT);
2415 if (IS_ERR_VALUE(tmp_addr))
2416 goto cleanup;
2417
2418 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2419 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2420 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2421 tmp_addr += 32;
2422 }
2423
2424 memset_io(udc->ep_param[0], 0,
2425 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2426
2427 udc->resume_state = USB_STATE_NOTATTACHED;
2428 udc->usb_state = USB_STATE_POWERED;
2429 udc->ep0_dir = 0;
2430
2431 spin_lock_init(&udc->lock);
2432 return udc;
2433
2434 cleanup:
2435 kfree(udc);
2436 return NULL;
2437 }
2438
2439 /* USB Controller register init */
2440 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2441 {
2442 struct usb_ctlr __iomem *qe_usbregs;
2443 qe_usbregs = udc->usb_regs;
2444
2445 /* Init the usb register */
2446 out_8(&qe_usbregs->usb_usmod, 0x01);
2447 out_be16(&qe_usbregs->usb_usbmr, 0);
2448 out_8(&qe_usbregs->usb_uscom, 0);
2449 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2450
2451 return 0;
2452 }
2453
2454 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2455 {
2456 struct qe_ep *ep = &udc->eps[pipe_num];
2457
2458 ep->udc = udc;
2459 strcpy(ep->name, ep_name[pipe_num]);
2460 ep->ep.name = ep_name[pipe_num];
2461
2462 ep->ep.ops = &qe_ep_ops;
2463 ep->stopped = 1;
2464 ep->ep.maxpacket = (unsigned short) ~0;
2465 ep->desc = NULL;
2466 ep->dir = 0xff;
2467 ep->epnum = (u8)pipe_num;
2468 ep->sent = 0;
2469 ep->last = 0;
2470 ep->init = 0;
2471 ep->rxframe = NULL;
2472 ep->txframe = NULL;
2473 ep->tx_req = NULL;
2474 ep->state = EP_STATE_IDLE;
2475 ep->has_data = 0;
2476
2477 /* the queue lists any req for this ep */
2478 INIT_LIST_HEAD(&ep->queue);
2479
2480 /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2481 if (pipe_num != 0)
2482 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2483
2484 ep->gadget = &udc->gadget;
2485
2486 return 0;
2487 }
2488
2489 /*-----------------------------------------------------------------------
2490 * UDC device Driver operation functions *
2491 *----------------------------------------------------------------------*/
2492 static void qe_udc_release(struct device *dev)
2493 {
2494 int i = 0;
2495
2496 complete(udc_controller->done);
2497 cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2498 for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2499 udc_controller->ep_param[i] = NULL;
2500
2501 kfree(udc_controller);
2502 udc_controller = NULL;
2503 }
2504
2505 /* Driver probe functions */
2506 static int __devinit qe_udc_probe(struct of_device *ofdev,
2507 const struct of_device_id *match)
2508 {
2509 struct device_node *np = ofdev->node;
2510 struct qe_ep *ep;
2511 unsigned int ret = 0;
2512 unsigned int i;
2513 const void *prop;
2514
2515 prop = of_get_property(np, "mode", NULL);
2516 if (!prop || strcmp(prop, "peripheral"))
2517 return -ENODEV;
2518
2519 /* Initialize the udc structure including QH member and other member */
2520 udc_controller = qe_udc_config(ofdev);
2521 if (!udc_controller) {
2522 dev_err(&ofdev->dev, "failed to initialize\n");
2523 return -ENOMEM;
2524 }
2525
2526 udc_controller->soc_type = (unsigned long)match->data;
2527 udc_controller->usb_regs = of_iomap(np, 0);
2528 if (!udc_controller->usb_regs) {
2529 ret = -ENOMEM;
2530 goto err1;
2531 }
2532
2533 /* initialize usb hw reg except for regs for EP,
2534 * leave usbintr reg untouched*/
2535 qe_udc_reg_init(udc_controller);
2536
2537 /* here comes the stand operations for probe
2538 * set the qe_udc->gadget.xxx */
2539 udc_controller->gadget.ops = &qe_gadget_ops;
2540
2541 /* gadget.ep0 is a pointer */
2542 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2543
2544 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2545
2546 /* modify in register gadget process */
2547 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2548
2549 /* name: Identifies the controller hardware type. */
2550 udc_controller->gadget.name = driver_name;
2551
2552 device_initialize(&udc_controller->gadget.dev);
2553
2554 dev_set_name(&udc_controller->gadget.dev, "gadget");
2555
2556 udc_controller->gadget.dev.release = qe_udc_release;
2557 udc_controller->gadget.dev.parent = &ofdev->dev;
2558
2559 /* initialize qe_ep struct */
2560 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2561 /* because the ep type isn't decide here so
2562 * qe_ep_init() should be called in ep_enable() */
2563
2564 /* setup the qe_ep struct and link ep.ep.list
2565 * into gadget.ep_list */
2566 qe_ep_config(udc_controller, (unsigned char)i);
2567 }
2568
2569 /* ep0 initialization in here */
2570 ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2571 if (ret)
2572 goto err2;
2573
2574 /* create a buf for ZLP send, need to remain zeroed */
2575 udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2576 if (udc_controller->nullbuf == NULL) {
2577 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2578 ret = -ENOMEM;
2579 goto err3;
2580 }
2581
2582 /* buffer for data of get_status request */
2583 udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2584 if (udc_controller->statusbuf == NULL) {
2585 ret = -ENOMEM;
2586 goto err4;
2587 }
2588
2589 udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2590 if (udc_controller->nullp == DMA_ADDR_INVALID) {
2591 udc_controller->nullp = dma_map_single(
2592 udc_controller->gadget.dev.parent,
2593 udc_controller->nullbuf,
2594 256,
2595 DMA_TO_DEVICE);
2596 udc_controller->nullmap = 1;
2597 } else {
2598 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2599 udc_controller->nullp, 256,
2600 DMA_TO_DEVICE);
2601 }
2602
2603 tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2604 (unsigned long)udc_controller);
2605 /* request irq and disable DR */
2606 udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2607 if (!udc_controller->usb_irq) {
2608 ret = -EINVAL;
2609 goto err_noirq;
2610 }
2611
2612 ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2613 driver_name, udc_controller);
2614 if (ret) {
2615 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2616 udc_controller->usb_irq, ret);
2617 goto err5;
2618 }
2619
2620 ret = device_add(&udc_controller->gadget.dev);
2621 if (ret)
2622 goto err6;
2623
2624 dev_info(udc_controller->dev,
2625 "%s USB controller initialized as device\n",
2626 (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2627 return 0;
2628
2629 err6:
2630 free_irq(udc_controller->usb_irq, udc_controller);
2631 err5:
2632 irq_dispose_mapping(udc_controller->usb_irq);
2633 err_noirq:
2634 if (udc_controller->nullmap) {
2635 dma_unmap_single(udc_controller->gadget.dev.parent,
2636 udc_controller->nullp, 256,
2637 DMA_TO_DEVICE);
2638 udc_controller->nullp = DMA_ADDR_INVALID;
2639 } else {
2640 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2641 udc_controller->nullp, 256,
2642 DMA_TO_DEVICE);
2643 }
2644 kfree(udc_controller->statusbuf);
2645 err4:
2646 kfree(udc_controller->nullbuf);
2647 err3:
2648 ep = &udc_controller->eps[0];
2649 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2650 kfree(ep->rxframe);
2651 kfree(ep->rxbuffer);
2652 kfree(ep->txframe);
2653 err2:
2654 iounmap(udc_controller->usb_regs);
2655 err1:
2656 kfree(udc_controller);
2657 udc_controller = NULL;
2658 return ret;
2659 }
2660
2661 #ifdef CONFIG_PM
2662 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2663 {
2664 return -ENOTSUPP;
2665 }
2666
2667 static int qe_udc_resume(struct of_device *dev)
2668 {
2669 return -ENOTSUPP;
2670 }
2671 #endif
2672
2673 static int __devexit qe_udc_remove(struct of_device *ofdev)
2674 {
2675 struct qe_ep *ep;
2676 unsigned int size;
2677
2678 DECLARE_COMPLETION(done);
2679
2680 if (!udc_controller)
2681 return -ENODEV;
2682
2683 udc_controller->done = &done;
2684 tasklet_disable(&udc_controller->rx_tasklet);
2685
2686 if (udc_controller->nullmap) {
2687 dma_unmap_single(udc_controller->gadget.dev.parent,
2688 udc_controller->nullp, 256,
2689 DMA_TO_DEVICE);
2690 udc_controller->nullp = DMA_ADDR_INVALID;
2691 } else {
2692 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2693 udc_controller->nullp, 256,
2694 DMA_TO_DEVICE);
2695 }
2696 kfree(udc_controller->statusbuf);
2697 kfree(udc_controller->nullbuf);
2698
2699 ep = &udc_controller->eps[0];
2700 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2701 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2702
2703 kfree(ep->rxframe);
2704 if (ep->rxbufmap) {
2705 dma_unmap_single(udc_controller->gadget.dev.parent,
2706 ep->rxbuf_d, size,
2707 DMA_FROM_DEVICE);
2708 ep->rxbuf_d = DMA_ADDR_INVALID;
2709 } else {
2710 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2711 ep->rxbuf_d, size,
2712 DMA_FROM_DEVICE);
2713 }
2714
2715 kfree(ep->rxbuffer);
2716 kfree(ep->txframe);
2717
2718 free_irq(udc_controller->usb_irq, udc_controller);
2719 irq_dispose_mapping(udc_controller->usb_irq);
2720
2721 tasklet_kill(&udc_controller->rx_tasklet);
2722
2723 iounmap(udc_controller->usb_regs);
2724
2725 device_unregister(&udc_controller->gadget.dev);
2726 /* wait for release() of gadget.dev to free udc */
2727 wait_for_completion(&done);
2728
2729 return 0;
2730 }
2731
2732 /*-------------------------------------------------------------------------*/
2733 static struct of_device_id __devinitdata qe_udc_match[] = {
2734 {
2735 .compatible = "fsl,mpc8360-qe-usb",
2736 .data = (void *)PORT_QE,
2737 },
2738 {
2739 .compatible = "fsl,mpc8272-cpm-usb",
2740 .data = (void *)PORT_CPM,
2741 },
2742 {},
2743 };
2744
2745 MODULE_DEVICE_TABLE(of, qe_udc_match);
2746
2747 static struct of_platform_driver udc_driver = {
2748 .name = (char *)driver_name,
2749 .match_table = qe_udc_match,
2750 .probe = qe_udc_probe,
2751 .remove = __devexit_p(qe_udc_remove),
2752 #ifdef CONFIG_PM
2753 .suspend = qe_udc_suspend,
2754 .resume = qe_udc_resume,
2755 #endif
2756 };
2757
2758 static int __init qe_udc_init(void)
2759 {
2760 printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2761 DRIVER_VERSION);
2762 return of_register_platform_driver(&udc_driver);
2763 }
2764
2765 static void __exit qe_udc_exit(void)
2766 {
2767 of_unregister_platform_driver(&udc_driver);
2768 }
2769
2770 module_init(qe_udc_init);
2771 module_exit(qe_udc_exit);
2772
2773 MODULE_DESCRIPTION(DRIVER_DESC);
2774 MODULE_AUTHOR(DRIVER_AUTHOR);
2775 MODULE_LICENSE("GPL");
2776
Linux 2.6 libata-dev (mirror)