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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / usb / gadget / fsl_qe_udc.c
blob7881f12413c40386924629ad0f5a3ff30ea09440
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 ep->tx_req = NULL;
1626 qe_ep_reset(udc, ep->epnum);
1627 spin_unlock_irqrestore(&udc->lock, flags);
1628
1629 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1630
1631 if (ep->dir == USB_DIR_OUT)
1632 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1633 (USB_BDRING_LEN_RX + 1);
1634 else
1635 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1636 (USB_BDRING_LEN + 1);
1637
1638 if (ep->dir != USB_DIR_IN) {
1639 kfree(ep->rxframe);
1640 if (ep->rxbufmap) {
1641 dma_unmap_single(udc_controller->gadget.dev.parent,
1642 ep->rxbuf_d, size,
1643 DMA_FROM_DEVICE);
1644 ep->rxbuf_d = DMA_ADDR_INVALID;
1645 } else {
1646 dma_sync_single_for_cpu(
1647 udc_controller->gadget.dev.parent,
1648 ep->rxbuf_d, size,
1649 DMA_FROM_DEVICE);
1650 }
1651 kfree(ep->rxbuffer);
1652 }
1653
1654 if (ep->dir != USB_DIR_OUT)
1655 kfree(ep->txframe);
1656
1657 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1658 return 0;
1659 }
1660
1661 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1662 {
1663 struct qe_req *req;
1664
1665 req = kzalloc(sizeof(*req), gfp_flags);
1666 if (!req)
1667 return NULL;
1668
1669 req->req.dma = DMA_ADDR_INVALID;
1670
1671 INIT_LIST_HEAD(&req->queue);
1672
1673 return &req->req;
1674 }
1675
1676 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1677 {
1678 struct qe_req *req;
1679
1680 req = container_of(_req, struct qe_req, req);
1681
1682 if (_req)
1683 kfree(req);
1684 }
1685
1686 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
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 int reval;
1692
1693 udc = ep->udc;
1694 /* catch various bogus parameters */
1695 if (!_req || !req->req.complete || !req->req.buf
1696 || !list_empty(&req->queue)) {
1697 dev_dbg(udc->dev, "bad params\n");
1698 return -EINVAL;
1699 }
1700 if (!_ep || (!ep->desc && ep_index(ep))) {
1701 dev_dbg(udc->dev, "bad ep\n");
1702 return -EINVAL;
1703 }
1704
1705 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1706 return -ESHUTDOWN;
1707
1708 req->ep = ep;
1709
1710 /* map virtual address to hardware */
1711 if (req->req.dma == DMA_ADDR_INVALID) {
1712 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1713 req->req.buf,
1714 req->req.length,
1715 ep_is_in(ep)
1716 ? DMA_TO_DEVICE :
1717 DMA_FROM_DEVICE);
1718 req->mapped = 1;
1719 } else {
1720 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1721 req->req.dma, req->req.length,
1722 ep_is_in(ep)
1723 ? DMA_TO_DEVICE :
1724 DMA_FROM_DEVICE);
1725 req->mapped = 0;
1726 }
1727
1728 req->req.status = -EINPROGRESS;
1729 req->req.actual = 0;
1730
1731 list_add_tail(&req->queue, &ep->queue);
1732 dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1733 ep->name, req->req.length);
1734
1735 /* push the request to device */
1736 if (ep_is_in(ep))
1737 reval = ep_req_send(ep, req);
1738
1739 /* EP0 */
1740 if (ep_index(ep) == 0 && req->req.length > 0) {
1741 if (ep_is_in(ep))
1742 udc->ep0_state = DATA_STATE_XMIT;
1743 else
1744 udc->ep0_state = DATA_STATE_RECV;
1745 }
1746
1747 if (ep->dir == USB_DIR_OUT)
1748 reval = ep_req_receive(ep, req);
1749
1750 return 0;
1751 }
1752
1753 /* queues (submits) an I/O request to an endpoint */
1754 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1755 gfp_t gfp_flags)
1756 {
1757 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1758 struct qe_udc *udc = ep->udc;
1759 unsigned long flags;
1760 int ret;
1761
1762 spin_lock_irqsave(&udc->lock, flags);
1763 ret = __qe_ep_queue(_ep, _req);
1764 spin_unlock_irqrestore(&udc->lock, flags);
1765 return ret;
1766 }
1767
1768 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1769 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1770 {
1771 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1772 struct qe_req *req;
1773 unsigned long flags;
1774
1775 if (!_ep || !_req)
1776 return -EINVAL;
1777
1778 spin_lock_irqsave(&ep->udc->lock, flags);
1779
1780 /* make sure it's actually queued on this endpoint */
1781 list_for_each_entry(req, &ep->queue, queue) {
1782 if (&req->req == _req)
1783 break;
1784 }
1785
1786 if (&req->req != _req) {
1787 spin_unlock_irqrestore(&ep->udc->lock, flags);
1788 return -EINVAL;
1789 }
1790
1791 done(ep, req, -ECONNRESET);
1792
1793 spin_unlock_irqrestore(&ep->udc->lock, flags);
1794 return 0;
1795 }
1796
1797 /*-----------------------------------------------------------------
1798 * modify the endpoint halt feature
1799 * @ep: the non-isochronous endpoint being stalled
1800 * @value: 1--set halt 0--clear halt
1801 * Returns zero, or a negative error code.
1802 *----------------------------------------------------------------*/
1803 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1804 {
1805 struct qe_ep *ep;
1806 unsigned long flags;
1807 int status = -EOPNOTSUPP;
1808 struct qe_udc *udc;
1809
1810 ep = container_of(_ep, struct qe_ep, ep);
1811 if (!_ep || !ep->desc) {
1812 status = -EINVAL;
1813 goto out;
1814 }
1815
1816 udc = ep->udc;
1817 /* Attempt to halt IN ep will fail if any transfer requests
1818 * are still queue */
1819 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1820 status = -EAGAIN;
1821 goto out;
1822 }
1823
1824 status = 0;
1825 spin_lock_irqsave(&ep->udc->lock, flags);
1826 qe_eptx_stall_change(ep, value);
1827 qe_eprx_stall_change(ep, value);
1828 spin_unlock_irqrestore(&ep->udc->lock, flags);
1829
1830 if (ep->epnum == 0) {
1831 udc->ep0_state = WAIT_FOR_SETUP;
1832 udc->ep0_dir = 0;
1833 }
1834
1835 /* set data toggle to DATA0 on clear halt */
1836 if (value == 0)
1837 ep->data01 = 0;
1838 out:
1839 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1840 value ? "set" : "clear", status);
1841
1842 return status;
1843 }
1844
1845 static struct usb_ep_ops qe_ep_ops = {
1846 .enable = qe_ep_enable,
1847 .disable = qe_ep_disable,
1848
1849 .alloc_request = qe_alloc_request,
1850 .free_request = qe_free_request,
1851
1852 .queue = qe_ep_queue,
1853 .dequeue = qe_ep_dequeue,
1854
1855 .set_halt = qe_ep_set_halt,
1856 };
1857
1858 /*------------------------------------------------------------------------
1859 Gadget Driver Layer Operations
1860 ------------------------------------------------------------------------*/
1861
1862 /* Get the current frame number */
1863 static int qe_get_frame(struct usb_gadget *gadget)
1864 {
1865 u16 tmp;
1866
1867 tmp = in_be16(&udc_controller->usb_param->frame_n);
1868 if (tmp & 0x8000)
1869 tmp = tmp & 0x07ff;
1870 else
1871 tmp = -EINVAL;
1872
1873 return (int)tmp;
1874 }
1875
1876 /* Tries to wake up the host connected to this gadget
1877 *
1878 * Return : 0-success
1879 * Negative-this feature not enabled by host or not supported by device hw
1880 */
1881 static int qe_wakeup(struct usb_gadget *gadget)
1882 {
1883 return -ENOTSUPP;
1884 }
1885
1886 /* Notify controller that VBUS is powered, Called by whatever
1887 detects VBUS sessions */
1888 static int qe_vbus_session(struct usb_gadget *gadget, int is_active)
1889 {
1890 return -ENOTSUPP;
1891 }
1892
1893 /* constrain controller's VBUS power usage
1894 * This call is used by gadget drivers during SET_CONFIGURATION calls,
1895 * reporting how much power the device may consume. For example, this
1896 * could affect how quickly batteries are recharged.
1897 *
1898 * Returns zero on success, else negative errno.
1899 */
1900 static int qe_vbus_draw(struct usb_gadget *gadget, unsigned mA)
1901 {
1902 return -ENOTSUPP;
1903 }
1904
1905 /* Change Data+ pullup status
1906 * this func is used by usb_gadget_connect/disconnect
1907 */
1908 static int qe_pullup(struct usb_gadget *gadget, int is_on)
1909 {
1910 return -ENOTSUPP;
1911 }
1912
1913 /* defined in usb_gadget.h */
1914 static struct usb_gadget_ops qe_gadget_ops = {
1915 .get_frame = qe_get_frame,
1916 .wakeup = qe_wakeup,
1917 /* .set_selfpowered = qe_set_selfpowered,*/ /* always selfpowered */
1918 .vbus_session = qe_vbus_session,
1919 .vbus_draw = qe_vbus_draw,
1920 .pullup = qe_pullup,
1921 };
1922
1923 /*-------------------------------------------------------------------------
1924 USB ep0 Setup process in BUS Enumeration
1925 -------------------------------------------------------------------------*/
1926 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1927 {
1928 struct qe_ep *ep = &udc->eps[pipe];
1929
1930 nuke(ep, -ECONNRESET);
1931 ep->tx_req = NULL;
1932 return 0;
1933 }
1934
1935 static int reset_queues(struct qe_udc *udc)
1936 {
1937 u8 pipe;
1938
1939 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1940 udc_reset_ep_queue(udc, pipe);
1941
1942 /* report disconnect; the driver is already quiesced */
1943 spin_unlock(&udc->lock);
1944 udc->driver->disconnect(&udc->gadget);
1945 spin_lock(&udc->lock);
1946
1947 return 0;
1948 }
1949
1950 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1951 u16 length)
1952 {
1953 /* Save the new address to device struct */
1954 udc->device_address = (u8) value;
1955 /* Update usb state */
1956 udc->usb_state = USB_STATE_ADDRESS;
1957
1958 /* Status phase , send a ZLP */
1959 if (ep0_prime_status(udc, USB_DIR_IN))
1960 qe_ep0_stall(udc);
1961 }
1962
1963 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1964 {
1965 struct qe_req *req = container_of(_req, struct qe_req, req);
1966
1967 req->req.buf = NULL;
1968 kfree(req);
1969 }
1970
1971 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1972 u16 index, u16 length)
1973 {
1974 u16 usb_status = 0;
1975 struct qe_req *req;
1976 struct qe_ep *ep;
1977 int status = 0;
1978
1979 ep = &udc->eps[0];
1980 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1981 /* Get device status */
1982 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1983 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1984 /* Get interface status */
1985 /* We don't have interface information in udc driver */
1986 usb_status = 0;
1987 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1988 /* Get endpoint status */
1989 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1990 struct qe_ep *target_ep = &udc->eps[pipe];
1991 u16 usep;
1992
1993 /* stall if endpoint doesn't exist */
1994 if (!target_ep->desc)
1995 goto stall;
1996
1997 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1998 if (index & USB_DIR_IN) {
1999 if (target_ep->dir != USB_DIR_IN)
2000 goto stall;
2001 if ((usep & USB_THS_MASK) == USB_THS_STALL)
2002 usb_status = 1 << USB_ENDPOINT_HALT;
2003 } else {
2004 if (target_ep->dir != USB_DIR_OUT)
2005 goto stall;
2006 if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
2007 usb_status = 1 << USB_ENDPOINT_HALT;
2008 }
2009 }
2010
2011 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
2012 struct qe_req, req);
2013 req->req.length = 2;
2014 req->req.buf = udc->statusbuf;
2015 *(u16 *)req->req.buf = cpu_to_le16(usb_status);
2016 req->req.status = -EINPROGRESS;
2017 req->req.actual = 0;
2018 req->req.complete = ownercomplete;
2019
2020 udc->ep0_dir = USB_DIR_IN;
2021
2022 /* data phase */
2023 status = __qe_ep_queue(&ep->ep, &req->req);
2024
2025 if (status == 0)
2026 return;
2027 stall:
2028 dev_err(udc->dev, "Can't respond to getstatus request \n");
2029 qe_ep0_stall(udc);
2030 }
2031
2032 /* only handle the setup request, suppose the device in normal status */
2033 static void setup_received_handle(struct qe_udc *udc,
2034 struct usb_ctrlrequest *setup)
2035 {
2036 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2037 u16 wValue = le16_to_cpu(setup->wValue);
2038 u16 wIndex = le16_to_cpu(setup->wIndex);
2039 u16 wLength = le16_to_cpu(setup->wLength);
2040
2041 /* clear the previous request in the ep0 */
2042 udc_reset_ep_queue(udc, 0);
2043
2044 if (setup->bRequestType & USB_DIR_IN)
2045 udc->ep0_dir = USB_DIR_IN;
2046 else
2047 udc->ep0_dir = USB_DIR_OUT;
2048
2049 switch (setup->bRequest) {
2050 case USB_REQ_GET_STATUS:
2051 /* Data+Status phase form udc */
2052 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2053 != (USB_DIR_IN | USB_TYPE_STANDARD))
2054 break;
2055 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2056 wLength);
2057 return;
2058
2059 case USB_REQ_SET_ADDRESS:
2060 /* Status phase from udc */
2061 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2062 USB_RECIP_DEVICE))
2063 break;
2064 ch9setaddress(udc, wValue, wIndex, wLength);
2065 return;
2066
2067 case USB_REQ_CLEAR_FEATURE:
2068 case USB_REQ_SET_FEATURE:
2069 /* Requests with no data phase, status phase from udc */
2070 if ((setup->bRequestType & USB_TYPE_MASK)
2071 != USB_TYPE_STANDARD)
2072 break;
2073
2074 if ((setup->bRequestType & USB_RECIP_MASK)
2075 == USB_RECIP_ENDPOINT) {
2076 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2077 struct qe_ep *ep;
2078
2079 if (wValue != 0 || wLength != 0
2080 || pipe > USB_MAX_ENDPOINTS)
2081 break;
2082 ep = &udc->eps[pipe];
2083
2084 spin_unlock(&udc->lock);
2085 qe_ep_set_halt(&ep->ep,
2086 (setup->bRequest == USB_REQ_SET_FEATURE)
2087 ? 1 : 0);
2088 spin_lock(&udc->lock);
2089 }
2090
2091 ep0_prime_status(udc, USB_DIR_IN);
2092
2093 return;
2094
2095 default:
2096 break;
2097 }
2098
2099 if (wLength) {
2100 /* Data phase from gadget, status phase from udc */
2101 if (setup->bRequestType & USB_DIR_IN) {
2102 udc->ep0_state = DATA_STATE_XMIT;
2103 udc->ep0_dir = USB_DIR_IN;
2104 } else {
2105 udc->ep0_state = DATA_STATE_RECV;
2106 udc->ep0_dir = USB_DIR_OUT;
2107 }
2108 spin_unlock(&udc->lock);
2109 if (udc->driver->setup(&udc->gadget,
2110 &udc->local_setup_buff) < 0)
2111 qe_ep0_stall(udc);
2112 spin_lock(&udc->lock);
2113 } else {
2114 /* No data phase, IN status from gadget */
2115 udc->ep0_dir = USB_DIR_IN;
2116 spin_unlock(&udc->lock);
2117 if (udc->driver->setup(&udc->gadget,
2118 &udc->local_setup_buff) < 0)
2119 qe_ep0_stall(udc);
2120 spin_lock(&udc->lock);
2121 udc->ep0_state = DATA_STATE_NEED_ZLP;
2122 }
2123 }
2124
2125 /*-------------------------------------------------------------------------
2126 USB Interrupt handlers
2127 -------------------------------------------------------------------------*/
2128 static void suspend_irq(struct qe_udc *udc)
2129 {
2130 udc->resume_state = udc->usb_state;
2131 udc->usb_state = USB_STATE_SUSPENDED;
2132
2133 /* report suspend to the driver ,serial.c not support this*/
2134 if (udc->driver->suspend)
2135 udc->driver->suspend(&udc->gadget);
2136 }
2137
2138 static void resume_irq(struct qe_udc *udc)
2139 {
2140 udc->usb_state = udc->resume_state;
2141 udc->resume_state = 0;
2142
2143 /* report resume to the driver , serial.c not support this*/
2144 if (udc->driver->resume)
2145 udc->driver->resume(&udc->gadget);
2146 }
2147
2148 static void idle_irq(struct qe_udc *udc)
2149 {
2150 u8 usbs;
2151
2152 usbs = in_8(&udc->usb_regs->usb_usbs);
2153 if (usbs & USB_IDLE_STATUS_MASK) {
2154 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2155 suspend_irq(udc);
2156 } else {
2157 if (udc->usb_state == USB_STATE_SUSPENDED)
2158 resume_irq(udc);
2159 }
2160 }
2161
2162 static int reset_irq(struct qe_udc *udc)
2163 {
2164 unsigned char i;
2165
2166 if (udc->usb_state == USB_STATE_DEFAULT)
2167 return 0;
2168
2169 qe_usb_disable();
2170 out_8(&udc->usb_regs->usb_usadr, 0);
2171
2172 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2173 if (udc->eps[i].init)
2174 qe_ep_reset(udc, i);
2175 }
2176
2177 reset_queues(udc);
2178 udc->usb_state = USB_STATE_DEFAULT;
2179 udc->ep0_state = WAIT_FOR_SETUP;
2180 udc->ep0_dir = USB_DIR_OUT;
2181 qe_usb_enable();
2182 return 0;
2183 }
2184
2185 static int bsy_irq(struct qe_udc *udc)
2186 {
2187 return 0;
2188 }
2189
2190 static int txe_irq(struct qe_udc *udc)
2191 {
2192 return 0;
2193 }
2194
2195 /* ep0 tx interrupt also in here */
2196 static int tx_irq(struct qe_udc *udc)
2197 {
2198 struct qe_ep *ep;
2199 struct qe_bd __iomem *bd;
2200 int i, res = 0;
2201
2202 if ((udc->usb_state == USB_STATE_ADDRESS)
2203 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2204 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2205
2206 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2207 ep = &udc->eps[i];
2208 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2209 bd = ep->c_txbd;
2210 if (!(in_be32((u32 __iomem *)bd) & T_R)
2211 && (in_be32(&bd->buf))) {
2212 /* confirm the transmitted bd */
2213 if (ep->epnum == 0)
2214 res = qe_ep0_txconf(ep);
2215 else
2216 res = qe_ep_txconf(ep);
2217 }
2218 }
2219 }
2220 return res;
2221 }
2222
2223
2224 /* setup packect's rx is handle in the function too */
2225 static void rx_irq(struct qe_udc *udc)
2226 {
2227 struct qe_ep *ep;
2228 struct qe_bd __iomem *bd;
2229 int i;
2230
2231 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2232 ep = &udc->eps[i];
2233 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2234 bd = ep->n_rxbd;
2235 if (!(in_be32((u32 __iomem *)bd) & R_E)
2236 && (in_be32(&bd->buf))) {
2237 if (ep->epnum == 0) {
2238 qe_ep0_rx(udc);
2239 } else {
2240 /*non-setup package receive*/
2241 qe_ep_rx(ep);
2242 }
2243 }
2244 }
2245 }
2246 }
2247
2248 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2249 {
2250 struct qe_udc *udc = (struct qe_udc *)_udc;
2251 u16 irq_src;
2252 irqreturn_t status = IRQ_NONE;
2253 unsigned long flags;
2254
2255 spin_lock_irqsave(&udc->lock, flags);
2256
2257 irq_src = in_be16(&udc->usb_regs->usb_usber) &
2258 in_be16(&udc->usb_regs->usb_usbmr);
2259 /* Clear notification bits */
2260 out_be16(&udc->usb_regs->usb_usber, irq_src);
2261 /* USB Interrupt */
2262 if (irq_src & USB_E_IDLE_MASK) {
2263 idle_irq(udc);
2264 irq_src &= ~USB_E_IDLE_MASK;
2265 status = IRQ_HANDLED;
2266 }
2267
2268 if (irq_src & USB_E_TXB_MASK) {
2269 tx_irq(udc);
2270 irq_src &= ~USB_E_TXB_MASK;
2271 status = IRQ_HANDLED;
2272 }
2273
2274 if (irq_src & USB_E_RXB_MASK) {
2275 rx_irq(udc);
2276 irq_src &= ~USB_E_RXB_MASK;
2277 status = IRQ_HANDLED;
2278 }
2279
2280 if (irq_src & USB_E_RESET_MASK) {
2281 reset_irq(udc);
2282 irq_src &= ~USB_E_RESET_MASK;
2283 status = IRQ_HANDLED;
2284 }
2285
2286 if (irq_src & USB_E_BSY_MASK) {
2287 bsy_irq(udc);
2288 irq_src &= ~USB_E_BSY_MASK;
2289 status = IRQ_HANDLED;
2290 }
2291
2292 if (irq_src & USB_E_TXE_MASK) {
2293 txe_irq(udc);
2294 irq_src &= ~USB_E_TXE_MASK;
2295 status = IRQ_HANDLED;
2296 }
2297
2298 spin_unlock_irqrestore(&udc->lock, flags);
2299
2300 return status;
2301 }
2302
2303 /*-------------------------------------------------------------------------
2304 Gadget driver register and unregister.
2305 --------------------------------------------------------------------------*/
2306 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
2307 {
2308 int retval;
2309 unsigned long flags = 0;
2310
2311 /* standard operations */
2312 if (!udc_controller)
2313 return -ENODEV;
2314
2315 if (!driver || (driver->speed != USB_SPEED_FULL
2316 && driver->speed != USB_SPEED_HIGH)
2317 || !driver->bind || !driver->disconnect
2318 || !driver->setup)
2319 return -EINVAL;
2320
2321 if (udc_controller->driver)
2322 return -EBUSY;
2323
2324 /* lock is needed but whether should use this lock or another */
2325 spin_lock_irqsave(&udc_controller->lock, flags);
2326
2327 driver->driver.bus = NULL;
2328 /* hook up the driver */
2329 udc_controller->driver = driver;
2330 udc_controller->gadget.dev.driver = &driver->driver;
2331 udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
2332 spin_unlock_irqrestore(&udc_controller->lock, flags);
2333
2334 retval = driver->bind(&udc_controller->gadget);
2335 if (retval) {
2336 dev_err(udc_controller->dev, "bind to %s --> %d",
2337 driver->driver.name, retval);
2338 udc_controller->gadget.dev.driver = NULL;
2339 udc_controller->driver = NULL;
2340 return retval;
2341 }
2342
2343 /* Enable IRQ reg and Set usbcmd reg EN bit */
2344 qe_usb_enable();
2345
2346 out_be16(&udc_controller->usb_regs->usb_usber, 0xffff);
2347 out_be16(&udc_controller->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2348 udc_controller->usb_state = USB_STATE_ATTACHED;
2349 udc_controller->ep0_state = WAIT_FOR_SETUP;
2350 udc_controller->ep0_dir = USB_DIR_OUT;
2351 dev_info(udc_controller->dev, "%s bind to driver %s \n",
2352 udc_controller->gadget.name, driver->driver.name);
2353 return 0;
2354 }
2355 EXPORT_SYMBOL(usb_gadget_register_driver);
2356
2357 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2358 {
2359 struct qe_ep *loop_ep;
2360 unsigned long flags;
2361
2362 if (!udc_controller)
2363 return -ENODEV;
2364
2365 if (!driver || driver != udc_controller->driver)
2366 return -EINVAL;
2367
2368 /* stop usb controller, disable intr */
2369 qe_usb_disable();
2370
2371 /* in fact, no needed */
2372 udc_controller->usb_state = USB_STATE_ATTACHED;
2373 udc_controller->ep0_state = WAIT_FOR_SETUP;
2374 udc_controller->ep0_dir = 0;
2375
2376 /* stand operation */
2377 spin_lock_irqsave(&udc_controller->lock, flags);
2378 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2379 nuke(&udc_controller->eps[0], -ESHUTDOWN);
2380 list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
2381 ep.ep_list)
2382 nuke(loop_ep, -ESHUTDOWN);
2383 spin_unlock_irqrestore(&udc_controller->lock, flags);
2384
2385 /* report disconnect; the controller is already quiesced */
2386 driver->disconnect(&udc_controller->gadget);
2387
2388 /* unbind gadget and unhook driver. */
2389 driver->unbind(&udc_controller->gadget);
2390 udc_controller->gadget.dev.driver = NULL;
2391 udc_controller->driver = NULL;
2392
2393 dev_info(udc_controller->dev, "unregistered gadget driver '%s'\r\n",
2394 driver->driver.name);
2395 return 0;
2396 }
2397 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2398
2399 /* udc structure's alloc and setup, include ep-param alloc */
2400 static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
2401 {
2402 struct qe_udc *udc;
2403 struct device_node *np = ofdev->node;
2404 unsigned int tmp_addr = 0;
2405 struct usb_device_para __iomem *usbpram;
2406 unsigned int i;
2407 u64 size;
2408 u32 offset;
2409
2410 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2411 if (udc == NULL) {
2412 dev_err(&ofdev->dev, "malloc udc failed\n");
2413 goto cleanup;
2414 }
2415
2416 udc->dev = &ofdev->dev;
2417
2418 /* get default address of usb parameter in MURAM from device tree */
2419 offset = *of_get_address(np, 1, &size, NULL);
2420 udc->usb_param = cpm_muram_addr(offset);
2421 memset_io(udc->usb_param, 0, size);
2422
2423 usbpram = udc->usb_param;
2424 out_be16(&usbpram->frame_n, 0);
2425 out_be32(&usbpram->rstate, 0);
2426
2427 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2428 sizeof(struct usb_ep_para)),
2429 USB_EP_PARA_ALIGNMENT);
2430 if (IS_ERR_VALUE(tmp_addr))
2431 goto cleanup;
2432
2433 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2434 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2435 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2436 tmp_addr += 32;
2437 }
2438
2439 memset_io(udc->ep_param[0], 0,
2440 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2441
2442 udc->resume_state = USB_STATE_NOTATTACHED;
2443 udc->usb_state = USB_STATE_POWERED;
2444 udc->ep0_dir = 0;
2445
2446 spin_lock_init(&udc->lock);
2447 return udc;
2448
2449 cleanup:
2450 kfree(udc);
2451 return NULL;
2452 }
2453
2454 /* USB Controller register init */
2455 static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2456 {
2457 struct usb_ctlr __iomem *qe_usbregs;
2458 qe_usbregs = udc->usb_regs;
2459
2460 /* Spec says that we must enable the USB controller to change mode. */
2461 out_8(&qe_usbregs->usb_usmod, 0x01);
2462 /* Mode changed, now disable it, since muram isn't initialized yet. */
2463 out_8(&qe_usbregs->usb_usmod, 0x00);
2464
2465 /* Initialize the rest. */
2466 out_be16(&qe_usbregs->usb_usbmr, 0);
2467 out_8(&qe_usbregs->usb_uscom, 0);
2468 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2469
2470 return 0;
2471 }
2472
2473 static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2474 {
2475 struct qe_ep *ep = &udc->eps[pipe_num];
2476
2477 ep->udc = udc;
2478 strcpy(ep->name, ep_name[pipe_num]);
2479 ep->ep.name = ep_name[pipe_num];
2480
2481 ep->ep.ops = &qe_ep_ops;
2482 ep->stopped = 1;
2483 ep->ep.maxpacket = (unsigned short) ~0;
2484 ep->desc = NULL;
2485 ep->dir = 0xff;
2486 ep->epnum = (u8)pipe_num;
2487 ep->sent = 0;
2488 ep->last = 0;
2489 ep->init = 0;
2490 ep->rxframe = NULL;
2491 ep->txframe = NULL;
2492 ep->tx_req = NULL;
2493 ep->state = EP_STATE_IDLE;
2494 ep->has_data = 0;
2495
2496 /* the queue lists any req for this ep */
2497 INIT_LIST_HEAD(&ep->queue);
2498
2499 /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2500 if (pipe_num != 0)
2501 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2502
2503 ep->gadget = &udc->gadget;
2504
2505 return 0;
2506 }
2507
2508 /*-----------------------------------------------------------------------
2509 * UDC device Driver operation functions *
2510 *----------------------------------------------------------------------*/
2511 static void qe_udc_release(struct device *dev)
2512 {
2513 int i = 0;
2514
2515 complete(udc_controller->done);
2516 cpm_muram_free(cpm_muram_offset(udc_controller->ep_param[0]));
2517 for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2518 udc_controller->ep_param[i] = NULL;
2519
2520 kfree(udc_controller);
2521 udc_controller = NULL;
2522 }
2523
2524 /* Driver probe functions */
2525 static int __devinit qe_udc_probe(struct of_device *ofdev,
2526 const struct of_device_id *match)
2527 {
2528 struct device_node *np = ofdev->node;
2529 struct qe_ep *ep;
2530 unsigned int ret = 0;
2531 unsigned int i;
2532 const void *prop;
2533
2534 prop = of_get_property(np, "mode", NULL);
2535 if (!prop || strcmp(prop, "peripheral"))
2536 return -ENODEV;
2537
2538 /* Initialize the udc structure including QH member and other member */
2539 udc_controller = qe_udc_config(ofdev);
2540 if (!udc_controller) {
2541 dev_err(&ofdev->dev, "failed to initialize\n");
2542 return -ENOMEM;
2543 }
2544
2545 udc_controller->soc_type = (unsigned long)match->data;
2546 udc_controller->usb_regs = of_iomap(np, 0);
2547 if (!udc_controller->usb_regs) {
2548 ret = -ENOMEM;
2549 goto err1;
2550 }
2551
2552 /* initialize usb hw reg except for regs for EP,
2553 * leave usbintr reg untouched*/
2554 qe_udc_reg_init(udc_controller);
2555
2556 /* here comes the stand operations for probe
2557 * set the qe_udc->gadget.xxx */
2558 udc_controller->gadget.ops = &qe_gadget_ops;
2559
2560 /* gadget.ep0 is a pointer */
2561 udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
2562
2563 INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
2564
2565 /* modify in register gadget process */
2566 udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
2567
2568 /* name: Identifies the controller hardware type. */
2569 udc_controller->gadget.name = driver_name;
2570
2571 device_initialize(&udc_controller->gadget.dev);
2572
2573 dev_set_name(&udc_controller->gadget.dev, "gadget");
2574
2575 udc_controller->gadget.dev.release = qe_udc_release;
2576 udc_controller->gadget.dev.parent = &ofdev->dev;
2577
2578 /* initialize qe_ep struct */
2579 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2580 /* because the ep type isn't decide here so
2581 * qe_ep_init() should be called in ep_enable() */
2582
2583 /* setup the qe_ep struct and link ep.ep.list
2584 * into gadget.ep_list */
2585 qe_ep_config(udc_controller, (unsigned char)i);
2586 }
2587
2588 /* ep0 initialization in here */
2589 ret = qe_ep_init(udc_controller, 0, &qe_ep0_desc);
2590 if (ret)
2591 goto err2;
2592
2593 /* create a buf for ZLP send, need to remain zeroed */
2594 udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
2595 if (udc_controller->nullbuf == NULL) {
2596 dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
2597 ret = -ENOMEM;
2598 goto err3;
2599 }
2600
2601 /* buffer for data of get_status request */
2602 udc_controller->statusbuf = kzalloc(2, GFP_KERNEL);
2603 if (udc_controller->statusbuf == NULL) {
2604 ret = -ENOMEM;
2605 goto err4;
2606 }
2607
2608 udc_controller->nullp = virt_to_phys((void *)udc_controller->nullbuf);
2609 if (udc_controller->nullp == DMA_ADDR_INVALID) {
2610 udc_controller->nullp = dma_map_single(
2611 udc_controller->gadget.dev.parent,
2612 udc_controller->nullbuf,
2613 256,
2614 DMA_TO_DEVICE);
2615 udc_controller->nullmap = 1;
2616 } else {
2617 dma_sync_single_for_device(udc_controller->gadget.dev.parent,
2618 udc_controller->nullp, 256,
2619 DMA_TO_DEVICE);
2620 }
2621
2622 tasklet_init(&udc_controller->rx_tasklet, ep_rx_tasklet,
2623 (unsigned long)udc_controller);
2624 /* request irq and disable DR */
2625 udc_controller->usb_irq = irq_of_parse_and_map(np, 0);
2626 if (!udc_controller->usb_irq) {
2627 ret = -EINVAL;
2628 goto err_noirq;
2629 }
2630
2631 ret = request_irq(udc_controller->usb_irq, qe_udc_irq, 0,
2632 driver_name, udc_controller);
2633 if (ret) {
2634 dev_err(udc_controller->dev, "cannot request irq %d err %d \n",
2635 udc_controller->usb_irq, ret);
2636 goto err5;
2637 }
2638
2639 ret = device_add(&udc_controller->gadget.dev);
2640 if (ret)
2641 goto err6;
2642
2643 dev_info(udc_controller->dev,
2644 "%s USB controller initialized as device\n",
2645 (udc_controller->soc_type == PORT_QE) ? "QE" : "CPM");
2646 return 0;
2647
2648 err6:
2649 free_irq(udc_controller->usb_irq, udc_controller);
2650 err5:
2651 irq_dispose_mapping(udc_controller->usb_irq);
2652 err_noirq:
2653 if (udc_controller->nullmap) {
2654 dma_unmap_single(udc_controller->gadget.dev.parent,
2655 udc_controller->nullp, 256,
2656 DMA_TO_DEVICE);
2657 udc_controller->nullp = DMA_ADDR_INVALID;
2658 } else {
2659 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2660 udc_controller->nullp, 256,
2661 DMA_TO_DEVICE);
2662 }
2663 kfree(udc_controller->statusbuf);
2664 err4:
2665 kfree(udc_controller->nullbuf);
2666 err3:
2667 ep = &udc_controller->eps[0];
2668 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2669 kfree(ep->rxframe);
2670 kfree(ep->rxbuffer);
2671 kfree(ep->txframe);
2672 err2:
2673 iounmap(udc_controller->usb_regs);
2674 err1:
2675 kfree(udc_controller);
2676 udc_controller = NULL;
2677 return ret;
2678 }
2679
2680 #ifdef CONFIG_PM
2681 static int qe_udc_suspend(struct of_device *dev, pm_message_t state)
2682 {
2683 return -ENOTSUPP;
2684 }
2685
2686 static int qe_udc_resume(struct of_device *dev)
2687 {
2688 return -ENOTSUPP;
2689 }
2690 #endif
2691
2692 static int __devexit qe_udc_remove(struct of_device *ofdev)
2693 {
2694 struct qe_ep *ep;
2695 unsigned int size;
2696
2697 DECLARE_COMPLETION(done);
2698
2699 if (!udc_controller)
2700 return -ENODEV;
2701
2702 udc_controller->done = &done;
2703 tasklet_disable(&udc_controller->rx_tasklet);
2704
2705 if (udc_controller->nullmap) {
2706 dma_unmap_single(udc_controller->gadget.dev.parent,
2707 udc_controller->nullp, 256,
2708 DMA_TO_DEVICE);
2709 udc_controller->nullp = DMA_ADDR_INVALID;
2710 } else {
2711 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2712 udc_controller->nullp, 256,
2713 DMA_TO_DEVICE);
2714 }
2715 kfree(udc_controller->statusbuf);
2716 kfree(udc_controller->nullbuf);
2717
2718 ep = &udc_controller->eps[0];
2719 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2720 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2721
2722 kfree(ep->rxframe);
2723 if (ep->rxbufmap) {
2724 dma_unmap_single(udc_controller->gadget.dev.parent,
2725 ep->rxbuf_d, size,
2726 DMA_FROM_DEVICE);
2727 ep->rxbuf_d = DMA_ADDR_INVALID;
2728 } else {
2729 dma_sync_single_for_cpu(udc_controller->gadget.dev.parent,
2730 ep->rxbuf_d, size,
2731 DMA_FROM_DEVICE);
2732 }
2733
2734 kfree(ep->rxbuffer);
2735 kfree(ep->txframe);
2736
2737 free_irq(udc_controller->usb_irq, udc_controller);
2738 irq_dispose_mapping(udc_controller->usb_irq);
2739
2740 tasklet_kill(&udc_controller->rx_tasklet);
2741
2742 iounmap(udc_controller->usb_regs);
2743
2744 device_unregister(&udc_controller->gadget.dev);
2745 /* wait for release() of gadget.dev to free udc */
2746 wait_for_completion(&done);
2747
2748 return 0;
2749 }
2750
2751 /*-------------------------------------------------------------------------*/
2752 static struct of_device_id __devinitdata qe_udc_match[] = {
2753 {
2754 .compatible = "fsl,mpc8323-qe-usb",
2755 .data = (void *)PORT_QE,
2756 },
2757 {
2758 .compatible = "fsl,mpc8360-qe-usb",
2759 .data = (void *)PORT_QE,
2760 },
2761 {
2762 .compatible = "fsl,mpc8272-cpm-usb",
2763 .data = (void *)PORT_CPM,
2764 },
2765 {},
2766 };
2767
2768 MODULE_DEVICE_TABLE(of, qe_udc_match);
2769
2770 static struct of_platform_driver udc_driver = {
2771 .name = (char *)driver_name,
2772 .match_table = qe_udc_match,
2773 .probe = qe_udc_probe,
2774 .remove = __devexit_p(qe_udc_remove),
2775 #ifdef CONFIG_PM
2776 .suspend = qe_udc_suspend,
2777 .resume = qe_udc_resume,
2778 #endif
2779 };
2780
2781 static int __init qe_udc_init(void)
2782 {
2783 printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
2784 DRIVER_VERSION);
2785 return of_register_platform_driver(&udc_driver);
2786 }
2787
2788 static void __exit qe_udc_exit(void)
2789 {
2790 of_unregister_platform_driver(&udc_driver);
2791 }
2792
2793 module_init(qe_udc_init);
2794 module_exit(qe_udc_exit);
2795
2796 MODULE_DESCRIPTION(DRIVER_DESC);
2797 MODULE_AUTHOR(DRIVER_AUTHOR);
2798 MODULE_LICENSE("GPL");
2799
Linux for Ginger Game Console