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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_address.h>
36#include <linux/of_platform.h>
37#include <linux/dma-mapping.h>
38#include <linux/usb/ch9.h>
39#include <linux/usb/gadget.h>
40#include <linux/usb/otg.h>
41#include <asm/qe.h>
42#include <asm/cpm.h>
43#include <asm/dma.h>
44#include <asm/reg.h>
45#include "fsl_qe_udc.h"
46
47#define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver"
48#define DRIVER_AUTHOR "Xie XiaoBo"
49#define DRIVER_VERSION "1.0"
50
51#define DMA_ADDR_INVALID (~(dma_addr_t)0)
52
53static const char driver_name[] = "fsl_qe_udc";
54static const char driver_desc[] = DRIVER_DESC;
55
56/*ep name is important in gadget, it should obey the convention of ep_match()*/
57static const char *const ep_name[] = {
58 "ep0-control", /* everyone has ep0 */
59 /* 3 configurable endpoints */
60 "ep1",
61 "ep2",
62 "ep3",
63};
64
65static struct usb_endpoint_descriptor qe_ep0_desc = {
66 .bLength = USB_DT_ENDPOINT_SIZE,
67 .bDescriptorType = USB_DT_ENDPOINT,
68
69 .bEndpointAddress = 0,
70 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
71 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
72};
73
74/********************************************************************
75 * Internal Used Function Start
76********************************************************************/
77/*-----------------------------------------------------------------
78 * done() - retire a request; caller blocked irqs
79 *--------------------------------------------------------------*/
80static void done(struct qe_ep *ep, struct qe_req *req, int status)
81{
82 struct qe_udc *udc = ep->udc;
83 unsigned char stopped = ep->stopped;
84
85 /* the req->queue pointer is used by ep_queue() func, in which
86 * the request will be added into a udc_ep->queue 'd tail
87 * so here the req will be dropped from the ep->queue
88 */
89 list_del_init(&req->queue);
90
91 /* req.status should be set as -EINPROGRESS in ep_queue() */
92 if (req->req.status == -EINPROGRESS)
93 req->req.status = status;
94 else
95 status = req->req.status;
96
97 if (req->mapped) {
98 dma_unmap_single(udc->gadget.dev.parent,
99 req->req.dma, req->req.length,
100 ep_is_in(ep)
101 ? DMA_TO_DEVICE
102 : DMA_FROM_DEVICE);
103 req->req.dma = DMA_ADDR_INVALID;
104 req->mapped = 0;
105 } else
106 dma_sync_single_for_cpu(udc->gadget.dev.parent,
107 req->req.dma, req->req.length,
108 ep_is_in(ep)
109 ? DMA_TO_DEVICE
110 : DMA_FROM_DEVICE);
111
112 if (status && (status != -ESHUTDOWN))
113 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
114 ep->ep.name, &req->req, status,
115 req->req.actual, req->req.length);
116
117 /* don't modify queue heads during completion callback */
118 ep->stopped = 1;
119 spin_unlock(&udc->lock);
120
121 /* this complete() should a func implemented by gadget layer,
122 * eg fsg->bulk_in_complete() */
123 if (req->req.complete)
124 req->req.complete(&ep->ep, &req->req);
125
126 spin_lock(&udc->lock);
127
128 ep->stopped = stopped;
129}
130
131/*-----------------------------------------------------------------
132 * nuke(): delete all requests related to this ep
133 *--------------------------------------------------------------*/
134static void nuke(struct qe_ep *ep, int status)
135{
136 /* Whether this eq has request linked */
137 while (!list_empty(&ep->queue)) {
138 struct qe_req *req = NULL;
139 req = list_entry(ep->queue.next, struct qe_req, queue);
140
141 done(ep, req, status);
142 }
143}
144
145/*---------------------------------------------------------------------------*
146 * USB and Endpoint manipulate process, include parameter and register *
147 *---------------------------------------------------------------------------*/
148/* @value: 1--set stall 0--clean stall */
149static int qe_eprx_stall_change(struct qe_ep *ep, int value)
150{
151 u16 tem_usep;
152 u8 epnum = ep->epnum;
153 struct qe_udc *udc = ep->udc;
154
155 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
156 tem_usep = tem_usep & ~USB_RHS_MASK;
157 if (value == 1)
158 tem_usep |= USB_RHS_STALL;
159 else if (ep->dir == USB_DIR_IN)
160 tem_usep |= USB_RHS_IGNORE_OUT;
161
162 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
163 return 0;
164}
165
166static int qe_eptx_stall_change(struct qe_ep *ep, int value)
167{
168 u16 tem_usep;
169 u8 epnum = ep->epnum;
170 struct qe_udc *udc = ep->udc;
171
172 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
173 tem_usep = tem_usep & ~USB_THS_MASK;
174 if (value == 1)
175 tem_usep |= USB_THS_STALL;
176 else if (ep->dir == USB_DIR_OUT)
177 tem_usep |= USB_THS_IGNORE_IN;
178
179 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
180
181 return 0;
182}
183
184static int qe_ep0_stall(struct qe_udc *udc)
185{
186 qe_eptx_stall_change(&udc->eps[0], 1);
187 qe_eprx_stall_change(&udc->eps[0], 1);
188 udc->ep0_state = WAIT_FOR_SETUP;
189 udc->ep0_dir = 0;
190 return 0;
191}
192
193static int qe_eprx_nack(struct qe_ep *ep)
194{
195 u8 epnum = ep->epnum;
196 struct qe_udc *udc = ep->udc;
197
198 if (ep->state == EP_STATE_IDLE) {
199 /* Set the ep's nack */
200 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
201 USB_RHS_MASK, USB_RHS_NACK);
202
203 /* Mask Rx and Busy interrupts */
204 clrbits16(&udc->usb_regs->usb_usbmr,
205 (USB_E_RXB_MASK | USB_E_BSY_MASK));
206
207 ep->state = EP_STATE_NACK;
208 }
209 return 0;
210}
211
212static int qe_eprx_normal(struct qe_ep *ep)
213{
214 struct qe_udc *udc = ep->udc;
215
216 if (ep->state == EP_STATE_NACK) {
217 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
218 USB_RTHS_MASK, USB_THS_IGNORE_IN);
219
220 /* Unmask RX interrupts */
221 out_be16(&udc->usb_regs->usb_usber,
222 USB_E_BSY_MASK | USB_E_RXB_MASK);
223 setbits16(&udc->usb_regs->usb_usbmr,
224 (USB_E_RXB_MASK | USB_E_BSY_MASK));
225
226 ep->state = EP_STATE_IDLE;
227 ep->has_data = 0;
228 }
229
230 return 0;
231}
232
233static int qe_ep_cmd_stoptx(struct qe_ep *ep)
234{
235 if (ep->udc->soc_type == PORT_CPM)
236 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
237 CPM_USB_STOP_TX_OPCODE);
238 else
239 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
240 ep->epnum, 0);
241
242 return 0;
243}
244
245static int qe_ep_cmd_restarttx(struct qe_ep *ep)
246{
247 if (ep->udc->soc_type == PORT_CPM)
248 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
249 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
250 else
251 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
252 ep->epnum, 0);
253
254 return 0;
255}
256
257static int qe_ep_flushtxfifo(struct qe_ep *ep)
258{
259 struct qe_udc *udc = ep->udc;
260 int i;
261
262 i = (int)ep->epnum;
263
264 qe_ep_cmd_stoptx(ep);
265 out_8(&udc->usb_regs->usb_uscom,
266 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
267 out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
268 out_be32(&udc->ep_param[i]->tstate, 0);
269 out_be16(&udc->ep_param[i]->tbcnt, 0);
270
271 ep->c_txbd = ep->txbase;
272 ep->n_txbd = ep->txbase;
273 qe_ep_cmd_restarttx(ep);
274 return 0;
275}
276
277static int qe_ep_filltxfifo(struct qe_ep *ep)
278{
279 struct qe_udc *udc = ep->udc;
280
281 out_8(&udc->usb_regs->usb_uscom,
282 USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
283 return 0;
284}
285
286static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
287{
288 struct qe_ep *ep;
289 u32 bdring_len;
290 struct qe_bd __iomem *bd;
291 int i;
292
293 ep = &udc->eps[pipe_num];
294
295 if (ep->dir == USB_DIR_OUT)
296 bdring_len = USB_BDRING_LEN_RX;
297 else
298 bdring_len = USB_BDRING_LEN;
299
300 bd = ep->rxbase;
301 for (i = 0; i < (bdring_len - 1); i++) {
302 out_be32((u32 __iomem *)bd, R_E | R_I);
303 bd++;
304 }
305 out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
306
307 bd = ep->txbase;
308 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
309 out_be32(&bd->buf, 0);
310 out_be32((u32 __iomem *)bd, 0);
311 bd++;
312 }
313 out_be32((u32 __iomem *)bd, T_W);
314
315 return 0;
316}
317
318static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
319{
320 struct qe_ep *ep;
321 u16 tmpusep;
322
323 ep = &udc->eps[pipe_num];
324 tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
325 tmpusep &= ~USB_RTHS_MASK;
326
327 switch (ep->dir) {
328 case USB_DIR_BOTH:
329 qe_ep_flushtxfifo(ep);
330 break;
331 case USB_DIR_OUT:
332 tmpusep |= USB_THS_IGNORE_IN;
333 break;
334 case USB_DIR_IN:
335 qe_ep_flushtxfifo(ep);
336 tmpusep |= USB_RHS_IGNORE_OUT;
337 break;
338 default:
339 break;
340 }
341 out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
342
343 qe_epbds_reset(udc, pipe_num);
344
345 return 0;
346}
347
348static int qe_ep_toggledata01(struct qe_ep *ep)
349{
350 ep->data01 ^= 0x1;
351 return 0;
352}
353
354static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
355{
356 struct qe_ep *ep = &udc->eps[pipe_num];
357 unsigned long tmp_addr = 0;
358 struct usb_ep_para __iomem *epparam;
359 int i;
360 struct qe_bd __iomem *bd;
361 int bdring_len;
362
363 if (ep->dir == USB_DIR_OUT)
364 bdring_len = USB_BDRING_LEN_RX;
365 else
366 bdring_len = USB_BDRING_LEN;
367
368 epparam = udc->ep_param[pipe_num];
369 /* alloc multi-ram for BD rings and set the ep parameters */
370 tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
371 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
372 if (IS_ERR_VALUE(tmp_addr))
373 return -ENOMEM;
374
375 out_be16(&epparam->rbase, (u16)tmp_addr);
376 out_be16(&epparam->tbase, (u16)(tmp_addr +
377 (sizeof(struct qe_bd) * bdring_len)));
378
379 out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
380 out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
381
382 ep->rxbase = cpm_muram_addr(tmp_addr);
383 ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
384 * bdring_len));
385 ep->n_rxbd = ep->rxbase;
386 ep->e_rxbd = ep->rxbase;
387 ep->n_txbd = ep->txbase;
388 ep->c_txbd = ep->txbase;
389 ep->data01 = 0; /* data0 */
390
391 /* Init TX and RX bds */
392 bd = ep->rxbase;
393 for (i = 0; i < bdring_len - 1; i++) {
394 out_be32(&bd->buf, 0);
395 out_be32((u32 __iomem *)bd, 0);
396 bd++;
397 }
398 out_be32(&bd->buf, 0);
399 out_be32((u32 __iomem *)bd, R_W);
400
401 bd = ep->txbase;
402 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
403 out_be32(&bd->buf, 0);
404 out_be32((u32 __iomem *)bd, 0);
405 bd++;
406 }
407 out_be32(&bd->buf, 0);
408 out_be32((u32 __iomem *)bd, T_W);
409
410 return 0;
411}
412
413static int qe_ep_rxbd_update(struct qe_ep *ep)
414{
415 unsigned int size;
416 int i;
417 unsigned int tmp;
418 struct qe_bd __iomem *bd;
419 unsigned int bdring_len;
420
421 if (ep->rxbase == NULL)
422 return -EINVAL;
423
424 bd = ep->rxbase;
425
426 ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
427 if (ep->rxframe == NULL) {
428 dev_err(ep->udc->dev, "malloc rxframe failed\n");
429 return -ENOMEM;
430 }
431
432 qe_frame_init(ep->rxframe);
433
434 if (ep->dir == USB_DIR_OUT)
435 bdring_len = USB_BDRING_LEN_RX;
436 else
437 bdring_len = USB_BDRING_LEN;
438
439 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
440 ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
441 if (ep->rxbuffer == NULL) {
442 dev_err(ep->udc->dev, "malloc rxbuffer failed,size=%d\n",
443 size);
444 kfree(ep->rxframe);
445 return -ENOMEM;
446 }
447
448 ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
449 if (ep->rxbuf_d == DMA_ADDR_INVALID) {
450 ep->rxbuf_d = dma_map_single(ep->udc->gadget.dev.parent,
451 ep->rxbuffer,
452 size,
453 DMA_FROM_DEVICE);
454 ep->rxbufmap = 1;
455 } else {
456 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
457 ep->rxbuf_d, size,
458 DMA_FROM_DEVICE);
459 ep->rxbufmap = 0;
460 }
461
462 size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
463 tmp = ep->rxbuf_d;
464 tmp = (u32)(((tmp >> 2) << 2) + 4);
465
466 for (i = 0; i < bdring_len - 1; i++) {
467 out_be32(&bd->buf, tmp);
468 out_be32((u32 __iomem *)bd, (R_E | R_I));
469 tmp = tmp + size;
470 bd++;
471 }
472 out_be32(&bd->buf, tmp);
473 out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
474
475 return 0;
476}
477
478static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
479{
480 struct qe_ep *ep = &udc->eps[pipe_num];
481 struct usb_ep_para __iomem *epparam;
482 u16 usep, logepnum;
483 u16 tmp;
484 u8 rtfcr = 0;
485
486 epparam = udc->ep_param[pipe_num];
487
488 usep = 0;
489 logepnum = (ep->ep.desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
490 usep |= (logepnum << USB_EPNUM_SHIFT);
491
492 switch (ep->ep.desc->bmAttributes & 0x03) {
493 case USB_ENDPOINT_XFER_BULK:
494 usep |= USB_TRANS_BULK;
495 break;
496 case USB_ENDPOINT_XFER_ISOC:
497 usep |= USB_TRANS_ISO;
498 break;
499 case USB_ENDPOINT_XFER_INT:
500 usep |= USB_TRANS_INT;
501 break;
502 default:
503 usep |= USB_TRANS_CTR;
504 break;
505 }
506
507 switch (ep->dir) {
508 case USB_DIR_OUT:
509 usep |= USB_THS_IGNORE_IN;
510 break;
511 case USB_DIR_IN:
512 usep |= USB_RHS_IGNORE_OUT;
513 break;
514 default:
515 break;
516 }
517 out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
518
519 rtfcr = 0x30;
520 out_8(&epparam->rbmr, rtfcr);
521 out_8(&epparam->tbmr, rtfcr);
522
523 tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
524 /* MRBLR must be divisble by 4 */
525 tmp = (u16)(((tmp >> 2) << 2) + 4);
526 out_be16(&epparam->mrblr, tmp);
527
528 return 0;
529}
530
531static int qe_ep_init(struct qe_udc *udc,
532 unsigned char pipe_num,
533 const struct usb_endpoint_descriptor *desc)
534{
535 struct qe_ep *ep = &udc->eps[pipe_num];
536 unsigned long flags;
537 int reval = 0;
538 u16 max = 0;
539
540 max = usb_endpoint_maxp(desc);
541
542 /* check the max package size validate for this endpoint */
543 /* Refer to USB2.0 spec table 9-13,
544 */
545 if (pipe_num != 0) {
546 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
547 case USB_ENDPOINT_XFER_BULK:
548 if (strstr(ep->ep.name, "-iso")
549 || strstr(ep->ep.name, "-int"))
550 goto en_done;
551 switch (udc->gadget.speed) {
552 case USB_SPEED_HIGH:
553 if ((max == 128) || (max == 256) || (max == 512))
554 break;
555 default:
556 switch (max) {
557 case 4:
558 case 8:
559 case 16:
560 case 32:
561 case 64:
562 break;
563 default:
564 case USB_SPEED_LOW:
565 goto en_done;
566 }
567 }
568 break;
569 case USB_ENDPOINT_XFER_INT:
570 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
571 goto en_done;
572 switch (udc->gadget.speed) {
573 case USB_SPEED_HIGH:
574 if (max <= 1024)
575 break;
576 case USB_SPEED_FULL:
577 if (max <= 64)
578 break;
579 default:
580 if (max <= 8)
581 break;
582 goto en_done;
583 }
584 break;
585 case USB_ENDPOINT_XFER_ISOC:
586 if (strstr(ep->ep.name, "-bulk")
587 || strstr(ep->ep.name, "-int"))
588 goto en_done;
589 switch (udc->gadget.speed) {
590 case USB_SPEED_HIGH:
591 if (max <= 1024)
592 break;
593 case USB_SPEED_FULL:
594 if (max <= 1023)
595 break;
596 default:
597 goto en_done;
598 }
599 break;
600 case USB_ENDPOINT_XFER_CONTROL:
601 if (strstr(ep->ep.name, "-iso")
602 || strstr(ep->ep.name, "-int"))
603 goto en_done;
604 switch (udc->gadget.speed) {
605 case USB_SPEED_HIGH:
606 case USB_SPEED_FULL:
607 switch (max) {
608 case 1:
609 case 2:
610 case 4:
611 case 8:
612 case 16:
613 case 32:
614 case 64:
615 break;
616 default:
617 goto en_done;
618 }
619 case USB_SPEED_LOW:
620 switch (max) {
621 case 1:
622 case 2:
623 case 4:
624 case 8:
625 break;
626 default:
627 goto en_done;
628 }
629 default:
630 goto en_done;
631 }
632 break;
633
634 default:
635 goto en_done;
636 }
637 } /* if ep0*/
638
639 spin_lock_irqsave(&udc->lock, flags);
640
641 /* initialize ep structure */
642 ep->ep.maxpacket = max;
643 ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
644 ep->ep.desc = desc;
645 ep->stopped = 0;
646 ep->init = 1;
647
648 if (pipe_num == 0) {
649 ep->dir = USB_DIR_BOTH;
650 udc->ep0_dir = USB_DIR_OUT;
651 udc->ep0_state = WAIT_FOR_SETUP;
652 } else {
653 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
654 case USB_DIR_OUT:
655 ep->dir = USB_DIR_OUT;
656 break;
657 case USB_DIR_IN:
658 ep->dir = USB_DIR_IN;
659 default:
660 break;
661 }
662 }
663
664 /* hardware special operation */
665 qe_ep_bd_init(udc, pipe_num);
666 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
667 reval = qe_ep_rxbd_update(ep);
668 if (reval)
669 goto en_done1;
670 }
671
672 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
673 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
674 if (ep->txframe == NULL) {
675 dev_err(udc->dev, "malloc txframe failed\n");
676 goto en_done2;
677 }
678 qe_frame_init(ep->txframe);
679 }
680
681 qe_ep_register_init(udc, pipe_num);
682
683 /* Now HW will be NAKing transfers to that EP,
684 * until a buffer is queued to it. */
685 spin_unlock_irqrestore(&udc->lock, flags);
686
687 return 0;
688en_done2:
689 kfree(ep->rxbuffer);
690 kfree(ep->rxframe);
691en_done1:
692 spin_unlock_irqrestore(&udc->lock, flags);
693en_done:
694 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
695 return -ENODEV;
696}
697
698static inline void qe_usb_enable(struct qe_udc *udc)
699{
700 setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
701}
702
703static inline void qe_usb_disable(struct qe_udc *udc)
704{
705 clrbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
706}
707
708/*----------------------------------------------------------------------------*
709 * USB and EP basic manipulate function end *
710 *----------------------------------------------------------------------------*/
711
712
713/******************************************************************************
714 UDC transmit and receive process
715 ******************************************************************************/
716static void recycle_one_rxbd(struct qe_ep *ep)
717{
718 u32 bdstatus;
719
720 bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
721 bdstatus = R_I | R_E | (bdstatus & R_W);
722 out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
723
724 if (bdstatus & R_W)
725 ep->e_rxbd = ep->rxbase;
726 else
727 ep->e_rxbd++;
728}
729
730static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
731{
732 u32 bdstatus;
733 struct qe_bd __iomem *bd, *nextbd;
734 unsigned char stop = 0;
735
736 nextbd = ep->n_rxbd;
737 bd = ep->e_rxbd;
738 bdstatus = in_be32((u32 __iomem *)bd);
739
740 while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
741 bdstatus = R_E | R_I | (bdstatus & R_W);
742 out_be32((u32 __iomem *)bd, bdstatus);
743
744 if (bdstatus & R_W)
745 bd = ep->rxbase;
746 else
747 bd++;
748
749 bdstatus = in_be32((u32 __iomem *)bd);
750 if (stopatnext && (bd == nextbd))
751 stop = 1;
752 }
753
754 ep->e_rxbd = bd;
755}
756
757static void ep_recycle_rxbds(struct qe_ep *ep)
758{
759 struct qe_bd __iomem *bd = ep->n_rxbd;
760 u32 bdstatus;
761 u8 epnum = ep->epnum;
762 struct qe_udc *udc = ep->udc;
763
764 bdstatus = in_be32((u32 __iomem *)bd);
765 if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
766 bd = ep->rxbase +
767 ((in_be16(&udc->ep_param[epnum]->rbptr) -
768 in_be16(&udc->ep_param[epnum]->rbase))
769 >> 3);
770 bdstatus = in_be32((u32 __iomem *)bd);
771
772 if (bdstatus & R_W)
773 bd = ep->rxbase;
774 else
775 bd++;
776
777 ep->e_rxbd = bd;
778 recycle_rxbds(ep, 0);
779 ep->e_rxbd = ep->n_rxbd;
780 } else
781 recycle_rxbds(ep, 1);
782
783 if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
784 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
785
786 if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
787 qe_eprx_normal(ep);
788
789 ep->localnack = 0;
790}
791
792static void setup_received_handle(struct qe_udc *udc,
793 struct usb_ctrlrequest *setup);
794static int qe_ep_rxframe_handle(struct qe_ep *ep);
795static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
796/* when BD PID is setup, handle the packet */
797static int ep0_setup_handle(struct qe_udc *udc)
798{
799 struct qe_ep *ep = &udc->eps[0];
800 struct qe_frame *pframe;
801 unsigned int fsize;
802 u8 *cp;
803
804 pframe = ep->rxframe;
805 if ((frame_get_info(pframe) & PID_SETUP)
806 && (udc->ep0_state == WAIT_FOR_SETUP)) {
807 fsize = frame_get_length(pframe);
808 if (unlikely(fsize != 8))
809 return -EINVAL;
810 cp = (u8 *)&udc->local_setup_buff;
811 memcpy(cp, pframe->data, fsize);
812 ep->data01 = 1;
813
814 /* handle the usb command base on the usb_ctrlrequest */
815 setup_received_handle(udc, &udc->local_setup_buff);
816 return 0;
817 }
818 return -EINVAL;
819}
820
821static int qe_ep0_rx(struct qe_udc *udc)
822{
823 struct qe_ep *ep = &udc->eps[0];
824 struct qe_frame *pframe;
825 struct qe_bd __iomem *bd;
826 u32 bdstatus, length;
827 u32 vaddr;
828
829 pframe = ep->rxframe;
830
831 if (ep->dir == USB_DIR_IN) {
832 dev_err(udc->dev, "ep0 not a control endpoint\n");
833 return -EINVAL;
834 }
835
836 bd = ep->n_rxbd;
837 bdstatus = in_be32((u32 __iomem *)bd);
838 length = bdstatus & BD_LENGTH_MASK;
839
840 while (!(bdstatus & R_E) && length) {
841 if ((bdstatus & R_F) && (bdstatus & R_L)
842 && !(bdstatus & R_ERROR)) {
843 if (length == USB_CRC_SIZE) {
844 udc->ep0_state = WAIT_FOR_SETUP;
845 dev_vdbg(udc->dev,
846 "receive a ZLP in status phase\n");
847 } else {
848 qe_frame_clean(pframe);
849 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
850 frame_set_data(pframe, (u8 *)vaddr);
851 frame_set_length(pframe,
852 (length - USB_CRC_SIZE));
853 frame_set_status(pframe, FRAME_OK);
854 switch (bdstatus & R_PID) {
855 case R_PID_SETUP:
856 frame_set_info(pframe, PID_SETUP);
857 break;
858 case R_PID_DATA1:
859 frame_set_info(pframe, PID_DATA1);
860 break;
861 default:
862 frame_set_info(pframe, PID_DATA0);
863 break;
864 }
865
866 if ((bdstatus & R_PID) == R_PID_SETUP)
867 ep0_setup_handle(udc);
868 else
869 qe_ep_rxframe_handle(ep);
870 }
871 } else {
872 dev_err(udc->dev, "The receive frame with error!\n");
873 }
874
875 /* note: don't clear the rxbd's buffer address */
876 recycle_one_rxbd(ep);
877
878 /* Get next BD */
879 if (bdstatus & R_W)
880 bd = ep->rxbase;
881 else
882 bd++;
883
884 bdstatus = in_be32((u32 __iomem *)bd);
885 length = bdstatus & BD_LENGTH_MASK;
886
887 }
888
889 ep->n_rxbd = bd;
890
891 return 0;
892}
893
894static int qe_ep_rxframe_handle(struct qe_ep *ep)
895{
896 struct qe_frame *pframe;
897 u8 framepid = 0;
898 unsigned int fsize;
899 u8 *cp;
900 struct qe_req *req;
901
902 pframe = ep->rxframe;
903
904 if (frame_get_info(pframe) & PID_DATA1)
905 framepid = 0x1;
906
907 if (framepid != ep->data01) {
908 dev_err(ep->udc->dev, "the data01 error!\n");
909 return -EIO;
910 }
911
912 fsize = frame_get_length(pframe);
913 if (list_empty(&ep->queue)) {
914 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
915 } else {
916 req = list_entry(ep->queue.next, struct qe_req, queue);
917
918 cp = (u8 *)(req->req.buf) + req->req.actual;
919 if (cp) {
920 memcpy(cp, pframe->data, fsize);
921 req->req.actual += fsize;
922 if ((fsize < ep->ep.maxpacket) ||
923 (req->req.actual >= req->req.length)) {
924 if (ep->epnum == 0)
925 ep0_req_complete(ep->udc, req);
926 else
927 done(ep, req, 0);
928 if (list_empty(&ep->queue) && ep->epnum != 0)
929 qe_eprx_nack(ep);
930 }
931 }
932 }
933
934 qe_ep_toggledata01(ep);
935
936 return 0;
937}
938
939static void ep_rx_tasklet(unsigned long data)
940{
941 struct qe_udc *udc = (struct qe_udc *)data;
942 struct qe_ep *ep;
943 struct qe_frame *pframe;
944 struct qe_bd __iomem *bd;
945 unsigned long flags;
946 u32 bdstatus, length;
947 u32 vaddr, i;
948
949 spin_lock_irqsave(&udc->lock, flags);
950
951 for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
952 ep = &udc->eps[i];
953
954 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
955 dev_dbg(udc->dev,
956 "This is a transmit ep or disable tasklet!\n");
957 continue;
958 }
959
960 pframe = ep->rxframe;
961 bd = ep->n_rxbd;
962 bdstatus = in_be32((u32 __iomem *)bd);
963 length = bdstatus & BD_LENGTH_MASK;
964
965 while (!(bdstatus & R_E) && length) {
966 if (list_empty(&ep->queue)) {
967 qe_eprx_nack(ep);
968 dev_dbg(udc->dev,
969 "The rxep have noreq %d\n",
970 ep->has_data);
971 break;
972 }
973
974 if ((bdstatus & R_F) && (bdstatus & R_L)
975 && !(bdstatus & R_ERROR)) {
976 qe_frame_clean(pframe);
977 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
978 frame_set_data(pframe, (u8 *)vaddr);
979 frame_set_length(pframe,
980 (length - USB_CRC_SIZE));
981 frame_set_status(pframe, FRAME_OK);
982 switch (bdstatus & R_PID) {
983 case R_PID_DATA1:
984 frame_set_info(pframe, PID_DATA1);
985 break;
986 case R_PID_SETUP:
987 frame_set_info(pframe, PID_SETUP);
988 break;
989 default:
990 frame_set_info(pframe, PID_DATA0);
991 break;
992 }
993 /* handle the rx frame */
994 qe_ep_rxframe_handle(ep);
995 } else {
996 dev_err(udc->dev,
997 "error in received frame\n");
998 }
999 /* note: don't clear the rxbd's buffer address */
1000 /*clear the length */
1001 out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
1002 ep->has_data--;
1003 if (!(ep->localnack))
1004 recycle_one_rxbd(ep);
1005
1006 /* Get next BD */
1007 if (bdstatus & R_W)
1008 bd = ep->rxbase;
1009 else
1010 bd++;
1011
1012 bdstatus = in_be32((u32 __iomem *)bd);
1013 length = bdstatus & BD_LENGTH_MASK;
1014 }
1015
1016 ep->n_rxbd = bd;
1017
1018 if (ep->localnack)
1019 ep_recycle_rxbds(ep);
1020
1021 ep->enable_tasklet = 0;
1022 } /* for i=1 */
1023
1024 spin_unlock_irqrestore(&udc->lock, flags);
1025}
1026
1027static int qe_ep_rx(struct qe_ep *ep)
1028{
1029 struct qe_udc *udc;
1030 struct qe_frame *pframe;
1031 struct qe_bd __iomem *bd;
1032 u16 swoffs, ucoffs, emptybds;
1033
1034 udc = ep->udc;
1035 pframe = ep->rxframe;
1036
1037 if (ep->dir == USB_DIR_IN) {
1038 dev_err(udc->dev, "transmit ep in rx function\n");
1039 return -EINVAL;
1040 }
1041
1042 bd = ep->n_rxbd;
1043
1044 swoffs = (u16)(bd - ep->rxbase);
1045 ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1046 in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1047 if (swoffs < ucoffs)
1048 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1049 else
1050 emptybds = swoffs - ucoffs;
1051
1052 if (emptybds < MIN_EMPTY_BDS) {
1053 qe_eprx_nack(ep);
1054 ep->localnack = 1;
1055 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1056 }
1057 ep->has_data = USB_BDRING_LEN_RX - emptybds;
1058
1059 if (list_empty(&ep->queue)) {
1060 qe_eprx_nack(ep);
1061 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1062 ep->has_data);
1063 return 0;
1064 }
1065
1066 tasklet_schedule(&udc->rx_tasklet);
1067 ep->enable_tasklet = 1;
1068
1069 return 0;
1070}
1071
1072/* send data from a frame, no matter what tx_req */
1073static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1074{
1075 struct qe_udc *udc = ep->udc;
1076 struct qe_bd __iomem *bd;
1077 u16 saveusbmr;
1078 u32 bdstatus, pidmask;
1079 u32 paddr;
1080
1081 if (ep->dir == USB_DIR_OUT) {
1082 dev_err(udc->dev, "receive ep passed to tx function\n");
1083 return -EINVAL;
1084 }
1085
1086 /* Disable the Tx interrupt */
1087 saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1088 out_be16(&udc->usb_regs->usb_usbmr,
1089 saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1090
1091 bd = ep->n_txbd;
1092 bdstatus = in_be32((u32 __iomem *)bd);
1093
1094 if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1095 if (frame_get_length(frame) == 0) {
1096 frame_set_data(frame, udc->nullbuf);
1097 frame_set_length(frame, 2);
1098 frame->info |= (ZLP | NO_CRC);
1099 dev_vdbg(udc->dev, "the frame size = 0\n");
1100 }
1101 paddr = virt_to_phys((void *)frame->data);
1102 out_be32(&bd->buf, paddr);
1103 bdstatus = (bdstatus&T_W);
1104 if (!(frame_get_info(frame) & NO_CRC))
1105 bdstatus |= T_R | T_I | T_L | T_TC
1106 | frame_get_length(frame);
1107 else
1108 bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1109
1110 /* if the packet is a ZLP in status phase */
1111 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1112 ep->data01 = 0x1;
1113
1114 if (ep->data01) {
1115 pidmask = T_PID_DATA1;
1116 frame->info |= PID_DATA1;
1117 } else {
1118 pidmask = T_PID_DATA0;
1119 frame->info |= PID_DATA0;
1120 }
1121 bdstatus |= T_CNF;
1122 bdstatus |= pidmask;
1123 out_be32((u32 __iomem *)bd, bdstatus);
1124 qe_ep_filltxfifo(ep);
1125
1126 /* enable the TX interrupt */
1127 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1128
1129 qe_ep_toggledata01(ep);
1130 if (bdstatus & T_W)
1131 ep->n_txbd = ep->txbase;
1132 else
1133 ep->n_txbd++;
1134
1135 return 0;
1136 } else {
1137 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1138 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1139 return -EBUSY;
1140 }
1141}
1142
1143/* when a bd was transmitted, the function can
1144 * handle the tx_req, not include ep0 */
1145static int txcomplete(struct qe_ep *ep, unsigned char restart)
1146{
1147 if (ep->tx_req != NULL) {
1148 struct qe_req *req = ep->tx_req;
1149 unsigned zlp = 0, last_len = 0;
1150
1151 last_len = min_t(unsigned, req->req.length - ep->sent,
1152 ep->ep.maxpacket);
1153
1154 if (!restart) {
1155 int asent = ep->last;
1156 ep->sent += asent;
1157 ep->last -= asent;
1158 } else {
1159 ep->last = 0;
1160 }
1161
1162 /* zlp needed when req->re.zero is set */
1163 if (req->req.zero) {
1164 if (last_len == 0 ||
1165 (req->req.length % ep->ep.maxpacket) != 0)
1166 zlp = 0;
1167 else
1168 zlp = 1;
1169 } else
1170 zlp = 0;
1171
1172 /* a request already were transmitted completely */
1173 if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) {
1174 done(ep, ep->tx_req, 0);
1175 ep->tx_req = NULL;
1176 ep->last = 0;
1177 ep->sent = 0;
1178 }
1179 }
1180
1181 /* we should gain a new tx_req fot this endpoint */
1182 if (ep->tx_req == NULL) {
1183 if (!list_empty(&ep->queue)) {
1184 ep->tx_req = list_entry(ep->queue.next, struct qe_req,
1185 queue);
1186 ep->last = 0;
1187 ep->sent = 0;
1188 }
1189 }
1190
1191 return 0;
1192}
1193
1194/* give a frame and a tx_req, send some data */
1195static int qe_usb_senddata(struct qe_ep *ep, struct qe_frame *frame)
1196{
1197 unsigned int size;
1198 u8 *buf;
1199
1200 qe_frame_clean(frame);
1201 size = min_t(u32, (ep->tx_req->req.length - ep->sent),
1202 ep->ep.maxpacket);
1203 buf = (u8 *)ep->tx_req->req.buf + ep->sent;
1204 if (buf && size) {
1205 ep->last = size;
1206 ep->tx_req->req.actual += size;
1207 frame_set_data(frame, buf);
1208 frame_set_length(frame, size);
1209 frame_set_status(frame, FRAME_OK);
1210 frame_set_info(frame, 0);
1211 return qe_ep_tx(ep, frame);
1212 }
1213 return -EIO;
1214}
1215
1216/* give a frame struct,send a ZLP */
1217static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1218{
1219 struct qe_udc *udc = ep->udc;
1220
1221 if (frame == NULL)
1222 return -ENODEV;
1223
1224 qe_frame_clean(frame);
1225 frame_set_data(frame, (u8 *)udc->nullbuf);
1226 frame_set_length(frame, 2);
1227 frame_set_status(frame, FRAME_OK);
1228 frame_set_info(frame, (ZLP | NO_CRC | infor));
1229
1230 return qe_ep_tx(ep, frame);
1231}
1232
1233static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1234{
1235 struct qe_req *req = ep->tx_req;
1236 int reval;
1237
1238 if (req == NULL)
1239 return -ENODEV;
1240
1241 if ((req->req.length - ep->sent) > 0)
1242 reval = qe_usb_senddata(ep, frame);
1243 else
1244 reval = sendnulldata(ep, frame, 0);
1245
1246 return reval;
1247}
1248
1249/* if direction is DIR_IN, the status is Device->Host
1250 * if direction is DIR_OUT, the status transaction is Device<-Host
1251 * in status phase, udc create a request and gain status */
1252static int ep0_prime_status(struct qe_udc *udc, int direction)
1253{
1254
1255 struct qe_ep *ep = &udc->eps[0];
1256
1257 if (direction == USB_DIR_IN) {
1258 udc->ep0_state = DATA_STATE_NEED_ZLP;
1259 udc->ep0_dir = USB_DIR_IN;
1260 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1261 } else {
1262 udc->ep0_dir = USB_DIR_OUT;
1263 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1264 }
1265
1266 return 0;
1267}
1268
1269/* a request complete in ep0, whether gadget request or udc request */
1270static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1271{
1272 struct qe_ep *ep = &udc->eps[0];
1273 /* because usb and ep's status already been set in ch9setaddress() */
1274
1275 switch (udc->ep0_state) {
1276 case DATA_STATE_XMIT:
1277 done(ep, req, 0);
1278 /* receive status phase */
1279 if (ep0_prime_status(udc, USB_DIR_OUT))
1280 qe_ep0_stall(udc);
1281 break;
1282
1283 case DATA_STATE_NEED_ZLP:
1284 done(ep, req, 0);
1285 udc->ep0_state = WAIT_FOR_SETUP;
1286 break;
1287
1288 case DATA_STATE_RECV:
1289 done(ep, req, 0);
1290 /* send status phase */
1291 if (ep0_prime_status(udc, USB_DIR_IN))
1292 qe_ep0_stall(udc);
1293 break;
1294
1295 case WAIT_FOR_OUT_STATUS:
1296 done(ep, req, 0);
1297 udc->ep0_state = WAIT_FOR_SETUP;
1298 break;
1299
1300 case WAIT_FOR_SETUP:
1301 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1302 break;
1303
1304 default:
1305 qe_ep0_stall(udc);
1306 break;
1307 }
1308}
1309
1310static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1311{
1312 struct qe_req *tx_req = NULL;
1313 struct qe_frame *frame = ep->txframe;
1314
1315 if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1316 if (!restart)
1317 ep->udc->ep0_state = WAIT_FOR_SETUP;
1318 else
1319 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1320 return 0;
1321 }
1322
1323 tx_req = ep->tx_req;
1324 if (tx_req != NULL) {
1325 if (!restart) {
1326 int asent = ep->last;
1327 ep->sent += asent;
1328 ep->last -= asent;
1329 } else {
1330 ep->last = 0;
1331 }
1332
1333 /* a request already were transmitted completely */
1334 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1335 ep->tx_req->req.actual = (unsigned int)ep->sent;
1336 ep0_req_complete(ep->udc, ep->tx_req);
1337 ep->tx_req = NULL;
1338 ep->last = 0;
1339 ep->sent = 0;
1340 }
1341 } else {
1342 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1343 }
1344
1345 return 0;
1346}
1347
1348static int ep0_txframe_handle(struct qe_ep *ep)
1349{
1350 /* if have error, transmit again */
1351 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1352 qe_ep_flushtxfifo(ep);
1353 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1354 if (frame_get_info(ep->txframe) & PID_DATA0)
1355 ep->data01 = 0;
1356 else
1357 ep->data01 = 1;
1358
1359 ep0_txcomplete(ep, 1);
1360 } else
1361 ep0_txcomplete(ep, 0);
1362
1363 frame_create_tx(ep, ep->txframe);
1364 return 0;
1365}
1366
1367static int qe_ep0_txconf(struct qe_ep *ep)
1368{
1369 struct qe_bd __iomem *bd;
1370 struct qe_frame *pframe;
1371 u32 bdstatus;
1372
1373 bd = ep->c_txbd;
1374 bdstatus = in_be32((u32 __iomem *)bd);
1375 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1376 pframe = ep->txframe;
1377
1378 /* clear and recycle the BD */
1379 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1380 out_be32(&bd->buf, 0);
1381 if (bdstatus & T_W)
1382 ep->c_txbd = ep->txbase;
1383 else
1384 ep->c_txbd++;
1385
1386 if (ep->c_txbd == ep->n_txbd) {
1387 if (bdstatus & DEVICE_T_ERROR) {
1388 frame_set_status(pframe, FRAME_ERROR);
1389 if (bdstatus & T_TO)
1390 pframe->status |= TX_ER_TIMEOUT;
1391 if (bdstatus & T_UN)
1392 pframe->status |= TX_ER_UNDERUN;
1393 }
1394 ep0_txframe_handle(ep);
1395 }
1396
1397 bd = ep->c_txbd;
1398 bdstatus = in_be32((u32 __iomem *)bd);
1399 }
1400
1401 return 0;
1402}
1403
1404static int ep_txframe_handle(struct qe_ep *ep)
1405{
1406 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1407 qe_ep_flushtxfifo(ep);
1408 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1409 if (frame_get_info(ep->txframe) & PID_DATA0)
1410 ep->data01 = 0;
1411 else
1412 ep->data01 = 1;
1413
1414 txcomplete(ep, 1);
1415 } else
1416 txcomplete(ep, 0);
1417
1418 frame_create_tx(ep, ep->txframe); /* send the data */
1419 return 0;
1420}
1421
1422/* confirm the already trainsmited bd */
1423static int qe_ep_txconf(struct qe_ep *ep)
1424{
1425 struct qe_bd __iomem *bd;
1426 struct qe_frame *pframe = NULL;
1427 u32 bdstatus;
1428 unsigned char breakonrxinterrupt = 0;
1429
1430 bd = ep->c_txbd;
1431 bdstatus = in_be32((u32 __iomem *)bd);
1432 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1433 pframe = ep->txframe;
1434 if (bdstatus & DEVICE_T_ERROR) {
1435 frame_set_status(pframe, FRAME_ERROR);
1436 if (bdstatus & T_TO)
1437 pframe->status |= TX_ER_TIMEOUT;
1438 if (bdstatus & T_UN)
1439 pframe->status |= TX_ER_UNDERUN;
1440 }
1441
1442 /* clear and recycle the BD */
1443 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1444 out_be32(&bd->buf, 0);
1445 if (bdstatus & T_W)
1446 ep->c_txbd = ep->txbase;
1447 else
1448 ep->c_txbd++;
1449
1450 /* handle the tx frame */
1451 ep_txframe_handle(ep);
1452 bd = ep->c_txbd;
1453 bdstatus = in_be32((u32 __iomem *)bd);
1454 }
1455 if (breakonrxinterrupt)
1456 return -EIO;
1457 else
1458 return 0;
1459}
1460
1461/* Add a request in queue, and try to transmit a packet */
1462static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1463{
1464 int reval = 0;
1465
1466 if (ep->tx_req == NULL) {
1467 ep->sent = 0;
1468 ep->last = 0;
1469 txcomplete(ep, 0); /* can gain a new tx_req */
1470 reval = frame_create_tx(ep, ep->txframe);
1471 }
1472 return reval;
1473}
1474
1475/* Maybe this is a good ideal */
1476static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1477{
1478 struct qe_udc *udc = ep->udc;
1479 struct qe_frame *pframe = NULL;
1480 struct qe_bd __iomem *bd;
1481 u32 bdstatus, length;
1482 u32 vaddr, fsize;
1483 u8 *cp;
1484 u8 finish_req = 0;
1485 u8 framepid;
1486
1487 if (list_empty(&ep->queue)) {
1488 dev_vdbg(udc->dev, "the req already finish!\n");
1489 return 0;
1490 }
1491 pframe = ep->rxframe;
1492
1493 bd = ep->n_rxbd;
1494 bdstatus = in_be32((u32 __iomem *)bd);
1495 length = bdstatus & BD_LENGTH_MASK;
1496
1497 while (!(bdstatus & R_E) && length) {
1498 if (finish_req)
1499 break;
1500 if ((bdstatus & R_F) && (bdstatus & R_L)
1501 && !(bdstatus & R_ERROR)) {
1502 qe_frame_clean(pframe);
1503 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1504 frame_set_data(pframe, (u8 *)vaddr);
1505 frame_set_length(pframe, (length - USB_CRC_SIZE));
1506 frame_set_status(pframe, FRAME_OK);
1507 switch (bdstatus & R_PID) {
1508 case R_PID_DATA1:
1509 frame_set_info(pframe, PID_DATA1); break;
1510 default:
1511 frame_set_info(pframe, PID_DATA0); break;
1512 }
1513 /* handle the rx frame */
1514
1515 if (frame_get_info(pframe) & PID_DATA1)
1516 framepid = 0x1;
1517 else
1518 framepid = 0;
1519
1520 if (framepid != ep->data01) {
1521 dev_vdbg(udc->dev, "the data01 error!\n");
1522 } else {
1523 fsize = frame_get_length(pframe);
1524
1525 cp = (u8 *)(req->req.buf) + req->req.actual;
1526 if (cp) {
1527 memcpy(cp, pframe->data, fsize);
1528 req->req.actual += fsize;
1529 if ((fsize < ep->ep.maxpacket)
1530 || (req->req.actual >=
1531 req->req.length)) {
1532 finish_req = 1;
1533 done(ep, req, 0);
1534 if (list_empty(&ep->queue))
1535 qe_eprx_nack(ep);
1536 }
1537 }
1538 qe_ep_toggledata01(ep);
1539 }
1540 } else {
1541 dev_err(udc->dev, "The receive frame with error!\n");
1542 }
1543
1544 /* note: don't clear the rxbd's buffer address *
1545 * only Clear the length */
1546 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1547 ep->has_data--;
1548
1549 /* Get next BD */
1550 if (bdstatus & R_W)
1551 bd = ep->rxbase;
1552 else
1553 bd++;
1554
1555 bdstatus = in_be32((u32 __iomem *)bd);
1556 length = bdstatus & BD_LENGTH_MASK;
1557 }
1558
1559 ep->n_rxbd = bd;
1560 ep_recycle_rxbds(ep);
1561
1562 return 0;
1563}
1564
1565/* only add the request in queue */
1566static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1567{
1568 if (ep->state == EP_STATE_NACK) {
1569 if (ep->has_data <= 0) {
1570 /* Enable rx and unmask rx interrupt */
1571 qe_eprx_normal(ep);
1572 } else {
1573 /* Copy the exist BD data */
1574 ep_req_rx(ep, req);
1575 }
1576 }
1577
1578 return 0;
1579}
1580
1581/********************************************************************
1582 Internal Used Function End
1583********************************************************************/
1584
1585/*-----------------------------------------------------------------------
1586 Endpoint Management Functions For Gadget
1587 -----------------------------------------------------------------------*/
1588static int qe_ep_enable(struct usb_ep *_ep,
1589 const struct usb_endpoint_descriptor *desc)
1590{
1591 struct qe_udc *udc;
1592 struct qe_ep *ep;
1593 int retval = 0;
1594 unsigned char epnum;
1595
1596 ep = container_of(_ep, struct qe_ep, ep);
1597
1598 /* catch various bogus parameters */
1599 if (!_ep || !desc || _ep->name == ep_name[0] ||
1600 (desc->bDescriptorType != USB_DT_ENDPOINT))
1601 return -EINVAL;
1602
1603 udc = ep->udc;
1604 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1605 return -ESHUTDOWN;
1606
1607 epnum = (u8)desc->bEndpointAddress & 0xF;
1608
1609 retval = qe_ep_init(udc, epnum, desc);
1610 if (retval != 0) {
1611 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1612 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1613 return -EINVAL;
1614 }
1615 dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1616 return 0;
1617}
1618
1619static int qe_ep_disable(struct usb_ep *_ep)
1620{
1621 struct qe_udc *udc;
1622 struct qe_ep *ep;
1623 unsigned long flags;
1624 unsigned int size;
1625
1626 ep = container_of(_ep, struct qe_ep, ep);
1627 udc = ep->udc;
1628
1629 if (!_ep || !ep->ep.desc) {
1630 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1631 return -EINVAL;
1632 }
1633
1634 spin_lock_irqsave(&udc->lock, flags);
1635 /* Nuke all pending requests (does flush) */
1636 nuke(ep, -ESHUTDOWN);
1637 ep->ep.desc = NULL;
1638 ep->stopped = 1;
1639 ep->tx_req = NULL;
1640 qe_ep_reset(udc, ep->epnum);
1641 spin_unlock_irqrestore(&udc->lock, flags);
1642
1643 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1644
1645 if (ep->dir == USB_DIR_OUT)
1646 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1647 (USB_BDRING_LEN_RX + 1);
1648 else
1649 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1650 (USB_BDRING_LEN + 1);
1651
1652 if (ep->dir != USB_DIR_IN) {
1653 kfree(ep->rxframe);
1654 if (ep->rxbufmap) {
1655 dma_unmap_single(udc->gadget.dev.parent,
1656 ep->rxbuf_d, size,
1657 DMA_FROM_DEVICE);
1658 ep->rxbuf_d = DMA_ADDR_INVALID;
1659 } else {
1660 dma_sync_single_for_cpu(
1661 udc->gadget.dev.parent,
1662 ep->rxbuf_d, size,
1663 DMA_FROM_DEVICE);
1664 }
1665 kfree(ep->rxbuffer);
1666 }
1667
1668 if (ep->dir != USB_DIR_OUT)
1669 kfree(ep->txframe);
1670
1671 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1672 return 0;
1673}
1674
1675static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1676{
1677 struct qe_req *req;
1678
1679 req = kzalloc(sizeof(*req), gfp_flags);
1680 if (!req)
1681 return NULL;
1682
1683 req->req.dma = DMA_ADDR_INVALID;
1684
1685 INIT_LIST_HEAD(&req->queue);
1686
1687 return &req->req;
1688}
1689
1690static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1691{
1692 struct qe_req *req;
1693
1694 req = container_of(_req, struct qe_req, req);
1695
1696 if (_req)
1697 kfree(req);
1698}
1699
1700static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
1701{
1702 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1703 struct qe_req *req = container_of(_req, struct qe_req, req);
1704 struct qe_udc *udc;
1705 int reval;
1706
1707 udc = ep->udc;
1708 /* catch various bogus parameters */
1709 if (!_req || !req->req.complete || !req->req.buf
1710 || !list_empty(&req->queue)) {
1711 dev_dbg(udc->dev, "bad params\n");
1712 return -EINVAL;
1713 }
1714 if (!_ep || (!ep->ep.desc && ep_index(ep))) {
1715 dev_dbg(udc->dev, "bad ep\n");
1716 return -EINVAL;
1717 }
1718
1719 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1720 return -ESHUTDOWN;
1721
1722 req->ep = ep;
1723
1724 /* map virtual address to hardware */
1725 if (req->req.dma == DMA_ADDR_INVALID) {
1726 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1727 req->req.buf,
1728 req->req.length,
1729 ep_is_in(ep)
1730 ? DMA_TO_DEVICE :
1731 DMA_FROM_DEVICE);
1732 req->mapped = 1;
1733 } else {
1734 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1735 req->req.dma, req->req.length,
1736 ep_is_in(ep)
1737 ? DMA_TO_DEVICE :
1738 DMA_FROM_DEVICE);
1739 req->mapped = 0;
1740 }
1741
1742 req->req.status = -EINPROGRESS;
1743 req->req.actual = 0;
1744
1745 list_add_tail(&req->queue, &ep->queue);
1746 dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1747 ep->name, req->req.length);
1748
1749 /* push the request to device */
1750 if (ep_is_in(ep))
1751 reval = ep_req_send(ep, req);
1752
1753 /* EP0 */
1754 if (ep_index(ep) == 0 && req->req.length > 0) {
1755 if (ep_is_in(ep))
1756 udc->ep0_state = DATA_STATE_XMIT;
1757 else
1758 udc->ep0_state = DATA_STATE_RECV;
1759 }
1760
1761 if (ep->dir == USB_DIR_OUT)
1762 reval = ep_req_receive(ep, req);
1763
1764 return 0;
1765}
1766
1767/* queues (submits) an I/O request to an endpoint */
1768static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1769 gfp_t gfp_flags)
1770{
1771 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1772 struct qe_udc *udc = ep->udc;
1773 unsigned long flags;
1774 int ret;
1775
1776 spin_lock_irqsave(&udc->lock, flags);
1777 ret = __qe_ep_queue(_ep, _req);
1778 spin_unlock_irqrestore(&udc->lock, flags);
1779 return ret;
1780}
1781
1782/* dequeues (cancels, unlinks) an I/O request from an endpoint */
1783static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1784{
1785 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1786 struct qe_req *req;
1787 unsigned long flags;
1788
1789 if (!_ep || !_req)
1790 return -EINVAL;
1791
1792 spin_lock_irqsave(&ep->udc->lock, flags);
1793
1794 /* make sure it's actually queued on this endpoint */
1795 list_for_each_entry(req, &ep->queue, queue) {
1796 if (&req->req == _req)
1797 break;
1798 }
1799
1800 if (&req->req != _req) {
1801 spin_unlock_irqrestore(&ep->udc->lock, flags);
1802 return -EINVAL;
1803 }
1804
1805 done(ep, req, -ECONNRESET);
1806
1807 spin_unlock_irqrestore(&ep->udc->lock, flags);
1808 return 0;
1809}
1810
1811/*-----------------------------------------------------------------
1812 * modify the endpoint halt feature
1813 * @ep: the non-isochronous endpoint being stalled
1814 * @value: 1--set halt 0--clear halt
1815 * Returns zero, or a negative error code.
1816*----------------------------------------------------------------*/
1817static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1818{
1819 struct qe_ep *ep;
1820 unsigned long flags;
1821 int status = -EOPNOTSUPP;
1822 struct qe_udc *udc;
1823
1824 ep = container_of(_ep, struct qe_ep, ep);
1825 if (!_ep || !ep->ep.desc) {
1826 status = -EINVAL;
1827 goto out;
1828 }
1829
1830 udc = ep->udc;
1831 /* Attempt to halt IN ep will fail if any transfer requests
1832 * are still queue */
1833 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1834 status = -EAGAIN;
1835 goto out;
1836 }
1837
1838 status = 0;
1839 spin_lock_irqsave(&ep->udc->lock, flags);
1840 qe_eptx_stall_change(ep, value);
1841 qe_eprx_stall_change(ep, value);
1842 spin_unlock_irqrestore(&ep->udc->lock, flags);
1843
1844 if (ep->epnum == 0) {
1845 udc->ep0_state = WAIT_FOR_SETUP;
1846 udc->ep0_dir = 0;
1847 }
1848
1849 /* set data toggle to DATA0 on clear halt */
1850 if (value == 0)
1851 ep->data01 = 0;
1852out:
1853 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1854 value ? "set" : "clear", status);
1855
1856 return status;
1857}
1858
1859static struct usb_ep_ops qe_ep_ops = {
1860 .enable = qe_ep_enable,
1861 .disable = qe_ep_disable,
1862
1863 .alloc_request = qe_alloc_request,
1864 .free_request = qe_free_request,
1865
1866 .queue = qe_ep_queue,
1867 .dequeue = qe_ep_dequeue,
1868
1869 .set_halt = qe_ep_set_halt,
1870};
1871
1872/*------------------------------------------------------------------------
1873 Gadget Driver Layer Operations
1874 ------------------------------------------------------------------------*/
1875
1876/* Get the current frame number */
1877static int qe_get_frame(struct usb_gadget *gadget)
1878{
1879 struct qe_udc *udc = container_of(gadget, struct qe_udc, gadget);
1880 u16 tmp;
1881
1882 tmp = in_be16(&udc->usb_param->frame_n);
1883 if (tmp & 0x8000)
1884 tmp = tmp & 0x07ff;
1885 else
1886 tmp = -EINVAL;
1887
1888 return (int)tmp;
1889}
1890
1891static int fsl_qe_start(struct usb_gadget *gadget,
1892 struct usb_gadget_driver *driver);
1893static int fsl_qe_stop(struct usb_gadget *gadget,
1894 struct usb_gadget_driver *driver);
1895
1896/* defined in usb_gadget.h */
1897static struct usb_gadget_ops qe_gadget_ops = {
1898 .get_frame = qe_get_frame,
1899 .udc_start = fsl_qe_start,
1900 .udc_stop = fsl_qe_stop,
1901};
1902
1903/*-------------------------------------------------------------------------
1904 USB ep0 Setup process in BUS Enumeration
1905 -------------------------------------------------------------------------*/
1906static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1907{
1908 struct qe_ep *ep = &udc->eps[pipe];
1909
1910 nuke(ep, -ECONNRESET);
1911 ep->tx_req = NULL;
1912 return 0;
1913}
1914
1915static int reset_queues(struct qe_udc *udc)
1916{
1917 u8 pipe;
1918
1919 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1920 udc_reset_ep_queue(udc, pipe);
1921
1922 /* report disconnect; the driver is already quiesced */
1923 spin_unlock(&udc->lock);
1924 udc->driver->disconnect(&udc->gadget);
1925 spin_lock(&udc->lock);
1926
1927 return 0;
1928}
1929
1930static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1931 u16 length)
1932{
1933 /* Save the new address to device struct */
1934 udc->device_address = (u8) value;
1935 /* Update usb state */
1936 udc->usb_state = USB_STATE_ADDRESS;
1937
1938 /* Status phase , send a ZLP */
1939 if (ep0_prime_status(udc, USB_DIR_IN))
1940 qe_ep0_stall(udc);
1941}
1942
1943static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1944{
1945 struct qe_req *req = container_of(_req, struct qe_req, req);
1946
1947 req->req.buf = NULL;
1948 kfree(req);
1949}
1950
1951static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1952 u16 index, u16 length)
1953{
1954 u16 usb_status = 0;
1955 struct qe_req *req;
1956 struct qe_ep *ep;
1957 int status = 0;
1958
1959 ep = &udc->eps[0];
1960 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1961 /* Get device status */
1962 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1963 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1964 /* Get interface status */
1965 /* We don't have interface information in udc driver */
1966 usb_status = 0;
1967 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1968 /* Get endpoint status */
1969 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1970 struct qe_ep *target_ep = &udc->eps[pipe];
1971 u16 usep;
1972
1973 /* stall if endpoint doesn't exist */
1974 if (!target_ep->ep.desc)
1975 goto stall;
1976
1977 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1978 if (index & USB_DIR_IN) {
1979 if (target_ep->dir != USB_DIR_IN)
1980 goto stall;
1981 if ((usep & USB_THS_MASK) == USB_THS_STALL)
1982 usb_status = 1 << USB_ENDPOINT_HALT;
1983 } else {
1984 if (target_ep->dir != USB_DIR_OUT)
1985 goto stall;
1986 if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
1987 usb_status = 1 << USB_ENDPOINT_HALT;
1988 }
1989 }
1990
1991 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
1992 struct qe_req, req);
1993 req->req.length = 2;
1994 req->req.buf = udc->statusbuf;
1995 *(u16 *)req->req.buf = cpu_to_le16(usb_status);
1996 req->req.status = -EINPROGRESS;
1997 req->req.actual = 0;
1998 req->req.complete = ownercomplete;
1999
2000 udc->ep0_dir = USB_DIR_IN;
2001
2002 /* data phase */
2003 status = __qe_ep_queue(&ep->ep, &req->req);
2004
2005 if (status == 0)
2006 return;
2007stall:
2008 dev_err(udc->dev, "Can't respond to getstatus request \n");
2009 qe_ep0_stall(udc);
2010}
2011
2012/* only handle the setup request, suppose the device in normal status */
2013static void setup_received_handle(struct qe_udc *udc,
2014 struct usb_ctrlrequest *setup)
2015{
2016 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2017 u16 wValue = le16_to_cpu(setup->wValue);
2018 u16 wIndex = le16_to_cpu(setup->wIndex);
2019 u16 wLength = le16_to_cpu(setup->wLength);
2020
2021 /* clear the previous request in the ep0 */
2022 udc_reset_ep_queue(udc, 0);
2023
2024 if (setup->bRequestType & USB_DIR_IN)
2025 udc->ep0_dir = USB_DIR_IN;
2026 else
2027 udc->ep0_dir = USB_DIR_OUT;
2028
2029 switch (setup->bRequest) {
2030 case USB_REQ_GET_STATUS:
2031 /* Data+Status phase form udc */
2032 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2033 != (USB_DIR_IN | USB_TYPE_STANDARD))
2034 break;
2035 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2036 wLength);
2037 return;
2038
2039 case USB_REQ_SET_ADDRESS:
2040 /* Status phase from udc */
2041 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2042 USB_RECIP_DEVICE))
2043 break;
2044 ch9setaddress(udc, wValue, wIndex, wLength);
2045 return;
2046
2047 case USB_REQ_CLEAR_FEATURE:
2048 case USB_REQ_SET_FEATURE:
2049 /* Requests with no data phase, status phase from udc */
2050 if ((setup->bRequestType & USB_TYPE_MASK)
2051 != USB_TYPE_STANDARD)
2052 break;
2053
2054 if ((setup->bRequestType & USB_RECIP_MASK)
2055 == USB_RECIP_ENDPOINT) {
2056 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2057 struct qe_ep *ep;
2058
2059 if (wValue != 0 || wLength != 0
2060 || pipe > USB_MAX_ENDPOINTS)
2061 break;
2062 ep = &udc->eps[pipe];
2063
2064 spin_unlock(&udc->lock);
2065 qe_ep_set_halt(&ep->ep,
2066 (setup->bRequest == USB_REQ_SET_FEATURE)
2067 ? 1 : 0);
2068 spin_lock(&udc->lock);
2069 }
2070
2071 ep0_prime_status(udc, USB_DIR_IN);
2072
2073 return;
2074
2075 default:
2076 break;
2077 }
2078
2079 if (wLength) {
2080 /* Data phase from gadget, status phase from udc */
2081 if (setup->bRequestType & USB_DIR_IN) {
2082 udc->ep0_state = DATA_STATE_XMIT;
2083 udc->ep0_dir = USB_DIR_IN;
2084 } else {
2085 udc->ep0_state = DATA_STATE_RECV;
2086 udc->ep0_dir = USB_DIR_OUT;
2087 }
2088 spin_unlock(&udc->lock);
2089 if (udc->driver->setup(&udc->gadget,
2090 &udc->local_setup_buff) < 0)
2091 qe_ep0_stall(udc);
2092 spin_lock(&udc->lock);
2093 } else {
2094 /* No data phase, IN status from gadget */
2095 udc->ep0_dir = USB_DIR_IN;
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 udc->ep0_state = DATA_STATE_NEED_ZLP;
2102 }
2103}
2104
2105/*-------------------------------------------------------------------------
2106 USB Interrupt handlers
2107 -------------------------------------------------------------------------*/
2108static void suspend_irq(struct qe_udc *udc)
2109{
2110 udc->resume_state = udc->usb_state;
2111 udc->usb_state = USB_STATE_SUSPENDED;
2112
2113 /* report suspend to the driver ,serial.c not support this*/
2114 if (udc->driver->suspend)
2115 udc->driver->suspend(&udc->gadget);
2116}
2117
2118static void resume_irq(struct qe_udc *udc)
2119{
2120 udc->usb_state = udc->resume_state;
2121 udc->resume_state = 0;
2122
2123 /* report resume to the driver , serial.c not support this*/
2124 if (udc->driver->resume)
2125 udc->driver->resume(&udc->gadget);
2126}
2127
2128static void idle_irq(struct qe_udc *udc)
2129{
2130 u8 usbs;
2131
2132 usbs = in_8(&udc->usb_regs->usb_usbs);
2133 if (usbs & USB_IDLE_STATUS_MASK) {
2134 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2135 suspend_irq(udc);
2136 } else {
2137 if (udc->usb_state == USB_STATE_SUSPENDED)
2138 resume_irq(udc);
2139 }
2140}
2141
2142static int reset_irq(struct qe_udc *udc)
2143{
2144 unsigned char i;
2145
2146 if (udc->usb_state == USB_STATE_DEFAULT)
2147 return 0;
2148
2149 qe_usb_disable(udc);
2150 out_8(&udc->usb_regs->usb_usadr, 0);
2151
2152 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2153 if (udc->eps[i].init)
2154 qe_ep_reset(udc, i);
2155 }
2156
2157 reset_queues(udc);
2158 udc->usb_state = USB_STATE_DEFAULT;
2159 udc->ep0_state = WAIT_FOR_SETUP;
2160 udc->ep0_dir = USB_DIR_OUT;
2161 qe_usb_enable(udc);
2162 return 0;
2163}
2164
2165static int bsy_irq(struct qe_udc *udc)
2166{
2167 return 0;
2168}
2169
2170static int txe_irq(struct qe_udc *udc)
2171{
2172 return 0;
2173}
2174
2175/* ep0 tx interrupt also in here */
2176static int tx_irq(struct qe_udc *udc)
2177{
2178 struct qe_ep *ep;
2179 struct qe_bd __iomem *bd;
2180 int i, res = 0;
2181
2182 if ((udc->usb_state == USB_STATE_ADDRESS)
2183 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2184 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2185
2186 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2187 ep = &udc->eps[i];
2188 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2189 bd = ep->c_txbd;
2190 if (!(in_be32((u32 __iomem *)bd) & T_R)
2191 && (in_be32(&bd->buf))) {
2192 /* confirm the transmitted bd */
2193 if (ep->epnum == 0)
2194 res = qe_ep0_txconf(ep);
2195 else
2196 res = qe_ep_txconf(ep);
2197 }
2198 }
2199 }
2200 return res;
2201}
2202
2203
2204/* setup packect's rx is handle in the function too */
2205static void rx_irq(struct qe_udc *udc)
2206{
2207 struct qe_ep *ep;
2208 struct qe_bd __iomem *bd;
2209 int i;
2210
2211 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2212 ep = &udc->eps[i];
2213 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2214 bd = ep->n_rxbd;
2215 if (!(in_be32((u32 __iomem *)bd) & R_E)
2216 && (in_be32(&bd->buf))) {
2217 if (ep->epnum == 0) {
2218 qe_ep0_rx(udc);
2219 } else {
2220 /*non-setup package receive*/
2221 qe_ep_rx(ep);
2222 }
2223 }
2224 }
2225 }
2226}
2227
2228static irqreturn_t qe_udc_irq(int irq, void *_udc)
2229{
2230 struct qe_udc *udc = (struct qe_udc *)_udc;
2231 u16 irq_src;
2232 irqreturn_t status = IRQ_NONE;
2233 unsigned long flags;
2234
2235 spin_lock_irqsave(&udc->lock, flags);
2236
2237 irq_src = in_be16(&udc->usb_regs->usb_usber) &
2238 in_be16(&udc->usb_regs->usb_usbmr);
2239 /* Clear notification bits */
2240 out_be16(&udc->usb_regs->usb_usber, irq_src);
2241 /* USB Interrupt */
2242 if (irq_src & USB_E_IDLE_MASK) {
2243 idle_irq(udc);
2244 irq_src &= ~USB_E_IDLE_MASK;
2245 status = IRQ_HANDLED;
2246 }
2247
2248 if (irq_src & USB_E_TXB_MASK) {
2249 tx_irq(udc);
2250 irq_src &= ~USB_E_TXB_MASK;
2251 status = IRQ_HANDLED;
2252 }
2253
2254 if (irq_src & USB_E_RXB_MASK) {
2255 rx_irq(udc);
2256 irq_src &= ~USB_E_RXB_MASK;
2257 status = IRQ_HANDLED;
2258 }
2259
2260 if (irq_src & USB_E_RESET_MASK) {
2261 reset_irq(udc);
2262 irq_src &= ~USB_E_RESET_MASK;
2263 status = IRQ_HANDLED;
2264 }
2265
2266 if (irq_src & USB_E_BSY_MASK) {
2267 bsy_irq(udc);
2268 irq_src &= ~USB_E_BSY_MASK;
2269 status = IRQ_HANDLED;
2270 }
2271
2272 if (irq_src & USB_E_TXE_MASK) {
2273 txe_irq(udc);
2274 irq_src &= ~USB_E_TXE_MASK;
2275 status = IRQ_HANDLED;
2276 }
2277
2278 spin_unlock_irqrestore(&udc->lock, flags);
2279
2280 return status;
2281}
2282
2283/*-------------------------------------------------------------------------
2284 Gadget driver probe and unregister.
2285 --------------------------------------------------------------------------*/
2286static int fsl_qe_start(struct usb_gadget *gadget,
2287 struct usb_gadget_driver *driver)
2288{
2289 struct qe_udc *udc;
2290 unsigned long flags;
2291
2292 udc = container_of(gadget, struct qe_udc, gadget);
2293 /* lock is needed but whether should use this lock or another */
2294 spin_lock_irqsave(&udc->lock, flags);
2295
2296 driver->driver.bus = NULL;
2297 /* hook up the driver */
2298 udc->driver = driver;
2299 udc->gadget.dev.driver = &driver->driver;
2300 udc->gadget.speed = driver->max_speed;
2301
2302 /* Enable IRQ reg and Set usbcmd reg EN bit */
2303 qe_usb_enable(udc);
2304
2305 out_be16(&udc->usb_regs->usb_usber, 0xffff);
2306 out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2307 udc->usb_state = USB_STATE_ATTACHED;
2308 udc->ep0_state = WAIT_FOR_SETUP;
2309 udc->ep0_dir = USB_DIR_OUT;
2310 spin_unlock_irqrestore(&udc->lock, flags);
2311
2312 dev_info(udc->dev, "%s bind to driver %s\n", udc->gadget.name,
2313 driver->driver.name);
2314 return 0;
2315}
2316
2317static int fsl_qe_stop(struct usb_gadget *gadget,
2318 struct usb_gadget_driver *driver)
2319{
2320 struct qe_udc *udc;
2321 struct qe_ep *loop_ep;
2322 unsigned long flags;
2323
2324 udc = container_of(gadget, struct qe_udc, gadget);
2325 /* stop usb controller, disable intr */
2326 qe_usb_disable(udc);
2327
2328 /* in fact, no needed */
2329 udc->usb_state = USB_STATE_ATTACHED;
2330 udc->ep0_state = WAIT_FOR_SETUP;
2331 udc->ep0_dir = 0;
2332
2333 /* stand operation */
2334 spin_lock_irqsave(&udc->lock, flags);
2335 udc->gadget.speed = USB_SPEED_UNKNOWN;
2336 nuke(&udc->eps[0], -ESHUTDOWN);
2337 list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list)
2338 nuke(loop_ep, -ESHUTDOWN);
2339 spin_unlock_irqrestore(&udc->lock, flags);
2340
2341 udc->gadget.dev.driver = NULL;
2342 udc->driver = NULL;
2343
2344 dev_info(udc->dev, "unregistered gadget driver '%s'\r\n",
2345 driver->driver.name);
2346 return 0;
2347}
2348
2349/* udc structure's alloc and setup, include ep-param alloc */
2350static struct qe_udc __devinit *qe_udc_config(struct platform_device *ofdev)
2351{
2352 struct qe_udc *udc;
2353 struct device_node *np = ofdev->dev.of_node;
2354 unsigned int tmp_addr = 0;
2355 struct usb_device_para __iomem *usbpram;
2356 unsigned int i;
2357 u64 size;
2358 u32 offset;
2359
2360 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2361 if (udc == NULL) {
2362 dev_err(&ofdev->dev, "malloc udc failed\n");
2363 goto cleanup;
2364 }
2365
2366 udc->dev = &ofdev->dev;
2367
2368 /* get default address of usb parameter in MURAM from device tree */
2369 offset = *of_get_address(np, 1, &size, NULL);
2370 udc->usb_param = cpm_muram_addr(offset);
2371 memset_io(udc->usb_param, 0, size);
2372
2373 usbpram = udc->usb_param;
2374 out_be16(&usbpram->frame_n, 0);
2375 out_be32(&usbpram->rstate, 0);
2376
2377 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2378 sizeof(struct usb_ep_para)),
2379 USB_EP_PARA_ALIGNMENT);
2380 if (IS_ERR_VALUE(tmp_addr))
2381 goto cleanup;
2382
2383 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2384 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2385 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2386 tmp_addr += 32;
2387 }
2388
2389 memset_io(udc->ep_param[0], 0,
2390 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2391
2392 udc->resume_state = USB_STATE_NOTATTACHED;
2393 udc->usb_state = USB_STATE_POWERED;
2394 udc->ep0_dir = 0;
2395
2396 spin_lock_init(&udc->lock);
2397 return udc;
2398
2399cleanup:
2400 kfree(udc);
2401 return NULL;
2402}
2403
2404/* USB Controller register init */
2405static int __devinit qe_udc_reg_init(struct qe_udc *udc)
2406{
2407 struct usb_ctlr __iomem *qe_usbregs;
2408 qe_usbregs = udc->usb_regs;
2409
2410 /* Spec says that we must enable the USB controller to change mode. */
2411 out_8(&qe_usbregs->usb_usmod, 0x01);
2412 /* Mode changed, now disable it, since muram isn't initialized yet. */
2413 out_8(&qe_usbregs->usb_usmod, 0x00);
2414
2415 /* Initialize the rest. */
2416 out_be16(&qe_usbregs->usb_usbmr, 0);
2417 out_8(&qe_usbregs->usb_uscom, 0);
2418 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2419
2420 return 0;
2421}
2422
2423static int __devinit qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2424{
2425 struct qe_ep *ep = &udc->eps[pipe_num];
2426
2427 ep->udc = udc;
2428 strcpy(ep->name, ep_name[pipe_num]);
2429 ep->ep.name = ep_name[pipe_num];
2430
2431 ep->ep.ops = &qe_ep_ops;
2432 ep->stopped = 1;
2433 ep->ep.maxpacket = (unsigned short) ~0;
2434 ep->ep.desc = NULL;
2435 ep->dir = 0xff;
2436 ep->epnum = (u8)pipe_num;
2437 ep->sent = 0;
2438 ep->last = 0;
2439 ep->init = 0;
2440 ep->rxframe = NULL;
2441 ep->txframe = NULL;
2442 ep->tx_req = NULL;
2443 ep->state = EP_STATE_IDLE;
2444 ep->has_data = 0;
2445
2446 /* the queue lists any req for this ep */
2447 INIT_LIST_HEAD(&ep->queue);
2448
2449 /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2450 if (pipe_num != 0)
2451 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2452
2453 ep->gadget = &udc->gadget;
2454
2455 return 0;
2456}
2457
2458/*-----------------------------------------------------------------------
2459 * UDC device Driver operation functions *
2460 *----------------------------------------------------------------------*/
2461static void qe_udc_release(struct device *dev)
2462{
2463 struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev);
2464 int i;
2465
2466 complete(udc->done);
2467 cpm_muram_free(cpm_muram_offset(udc->ep_param[0]));
2468 for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2469 udc->ep_param[i] = NULL;
2470
2471 kfree(udc);
2472}
2473
2474/* Driver probe functions */
2475static const struct of_device_id qe_udc_match[];
2476static int __devinit qe_udc_probe(struct platform_device *ofdev)
2477{
2478 struct qe_udc *udc;
2479 const struct of_device_id *match;
2480 struct device_node *np = ofdev->dev.of_node;
2481 struct qe_ep *ep;
2482 unsigned int ret = 0;
2483 unsigned int i;
2484 const void *prop;
2485
2486 match = of_match_device(qe_udc_match, &ofdev->dev);
2487 if (!match)
2488 return -EINVAL;
2489
2490 prop = of_get_property(np, "mode", NULL);
2491 if (!prop || strcmp(prop, "peripheral"))
2492 return -ENODEV;
2493
2494 /* Initialize the udc structure including QH member and other member */
2495 udc = qe_udc_config(ofdev);
2496 if (!udc) {
2497 dev_err(&ofdev->dev, "failed to initialize\n");
2498 return -ENOMEM;
2499 }
2500
2501 udc->soc_type = (unsigned long)match->data;
2502 udc->usb_regs = of_iomap(np, 0);
2503 if (!udc->usb_regs) {
2504 ret = -ENOMEM;
2505 goto err1;
2506 }
2507
2508 /* initialize usb hw reg except for regs for EP,
2509 * leave usbintr reg untouched*/
2510 qe_udc_reg_init(udc);
2511
2512 /* here comes the stand operations for probe
2513 * set the qe_udc->gadget.xxx */
2514 udc->gadget.ops = &qe_gadget_ops;
2515
2516 /* gadget.ep0 is a pointer */
2517 udc->gadget.ep0 = &udc->eps[0].ep;
2518
2519 INIT_LIST_HEAD(&udc->gadget.ep_list);
2520
2521 /* modify in register gadget process */
2522 udc->gadget.speed = USB_SPEED_UNKNOWN;
2523
2524 /* name: Identifies the controller hardware type. */
2525 udc->gadget.name = driver_name;
2526
2527 device_initialize(&udc->gadget.dev);
2528
2529 dev_set_name(&udc->gadget.dev, "gadget");
2530
2531 udc->gadget.dev.release = qe_udc_release;
2532 udc->gadget.dev.parent = &ofdev->dev;
2533
2534 /* initialize qe_ep struct */
2535 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2536 /* because the ep type isn't decide here so
2537 * qe_ep_init() should be called in ep_enable() */
2538
2539 /* setup the qe_ep struct and link ep.ep.list
2540 * into gadget.ep_list */
2541 qe_ep_config(udc, (unsigned char)i);
2542 }
2543
2544 /* ep0 initialization in here */
2545 ret = qe_ep_init(udc, 0, &qe_ep0_desc);
2546 if (ret)
2547 goto err2;
2548
2549 /* create a buf for ZLP send, need to remain zeroed */
2550 udc->nullbuf = kzalloc(256, GFP_KERNEL);
2551 if (udc->nullbuf == NULL) {
2552 dev_err(udc->dev, "cannot alloc nullbuf\n");
2553 ret = -ENOMEM;
2554 goto err3;
2555 }
2556
2557 /* buffer for data of get_status request */
2558 udc->statusbuf = kzalloc(2, GFP_KERNEL);
2559 if (udc->statusbuf == NULL) {
2560 ret = -ENOMEM;
2561 goto err4;
2562 }
2563
2564 udc->nullp = virt_to_phys((void *)udc->nullbuf);
2565 if (udc->nullp == DMA_ADDR_INVALID) {
2566 udc->nullp = dma_map_single(
2567 udc->gadget.dev.parent,
2568 udc->nullbuf,
2569 256,
2570 DMA_TO_DEVICE);
2571 udc->nullmap = 1;
2572 } else {
2573 dma_sync_single_for_device(udc->gadget.dev.parent,
2574 udc->nullp, 256,
2575 DMA_TO_DEVICE);
2576 }
2577
2578 tasklet_init(&udc->rx_tasklet, ep_rx_tasklet,
2579 (unsigned long)udc);
2580 /* request irq and disable DR */
2581 udc->usb_irq = irq_of_parse_and_map(np, 0);
2582 if (!udc->usb_irq) {
2583 ret = -EINVAL;
2584 goto err_noirq;
2585 }
2586
2587 ret = request_irq(udc->usb_irq, qe_udc_irq, 0,
2588 driver_name, udc);
2589 if (ret) {
2590 dev_err(udc->dev, "cannot request irq %d err %d\n",
2591 udc->usb_irq, ret);
2592 goto err5;
2593 }
2594
2595 ret = device_add(&udc->gadget.dev);
2596 if (ret)
2597 goto err6;
2598
2599 ret = usb_add_gadget_udc(&ofdev->dev, &udc->gadget);
2600 if (ret)
2601 goto err7;
2602
2603 dev_set_drvdata(&ofdev->dev, udc);
2604 dev_info(udc->dev,
2605 "%s USB controller initialized as device\n",
2606 (udc->soc_type == PORT_QE) ? "QE" : "CPM");
2607 return 0;
2608
2609err7:
2610 device_unregister(&udc->gadget.dev);
2611err6:
2612 free_irq(udc->usb_irq, udc);
2613err5:
2614 irq_dispose_mapping(udc->usb_irq);
2615err_noirq:
2616 if (udc->nullmap) {
2617 dma_unmap_single(udc->gadget.dev.parent,
2618 udc->nullp, 256,
2619 DMA_TO_DEVICE);
2620 udc->nullp = DMA_ADDR_INVALID;
2621 } else {
2622 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2623 udc->nullp, 256,
2624 DMA_TO_DEVICE);
2625 }
2626 kfree(udc->statusbuf);
2627err4:
2628 kfree(udc->nullbuf);
2629err3:
2630 ep = &udc->eps[0];
2631 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2632 kfree(ep->rxframe);
2633 kfree(ep->rxbuffer);
2634 kfree(ep->txframe);
2635err2:
2636 iounmap(udc->usb_regs);
2637err1:
2638 kfree(udc);
2639 return ret;
2640}
2641
2642#ifdef CONFIG_PM
2643static int qe_udc_suspend(struct platform_device *dev, pm_message_t state)
2644{
2645 return -ENOTSUPP;
2646}
2647
2648static int qe_udc_resume(struct platform_device *dev)
2649{
2650 return -ENOTSUPP;
2651}
2652#endif
2653
2654static int __devexit qe_udc_remove(struct platform_device *ofdev)
2655{
2656 struct qe_udc *udc = dev_get_drvdata(&ofdev->dev);
2657 struct qe_ep *ep;
2658 unsigned int size;
2659 DECLARE_COMPLETION(done);
2660
2661 usb_del_gadget_udc(&udc->gadget);
2662
2663 udc->done = &done;
2664 tasklet_disable(&udc->rx_tasklet);
2665
2666 if (udc->nullmap) {
2667 dma_unmap_single(udc->gadget.dev.parent,
2668 udc->nullp, 256,
2669 DMA_TO_DEVICE);
2670 udc->nullp = DMA_ADDR_INVALID;
2671 } else {
2672 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2673 udc->nullp, 256,
2674 DMA_TO_DEVICE);
2675 }
2676 kfree(udc->statusbuf);
2677 kfree(udc->nullbuf);
2678
2679 ep = &udc->eps[0];
2680 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2681 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2682
2683 kfree(ep->rxframe);
2684 if (ep->rxbufmap) {
2685 dma_unmap_single(udc->gadget.dev.parent,
2686 ep->rxbuf_d, size,
2687 DMA_FROM_DEVICE);
2688 ep->rxbuf_d = DMA_ADDR_INVALID;
2689 } else {
2690 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2691 ep->rxbuf_d, size,
2692 DMA_FROM_DEVICE);
2693 }
2694
2695 kfree(ep->rxbuffer);
2696 kfree(ep->txframe);
2697
2698 free_irq(udc->usb_irq, udc);
2699 irq_dispose_mapping(udc->usb_irq);
2700
2701 tasklet_kill(&udc->rx_tasklet);
2702
2703 iounmap(udc->usb_regs);
2704
2705 device_unregister(&udc->gadget.dev);
2706 /* wait for release() of gadget.dev to free udc */
2707 wait_for_completion(&done);
2708
2709 return 0;
2710}
2711
2712/*-------------------------------------------------------------------------*/
2713static const struct of_device_id qe_udc_match[] __devinitconst = {
2714 {
2715 .compatible = "fsl,mpc8323-qe-usb",
2716 .data = (void *)PORT_QE,
2717 },
2718 {
2719 .compatible = "fsl,mpc8360-qe-usb",
2720 .data = (void *)PORT_QE,
2721 },
2722 {
2723 .compatible = "fsl,mpc8272-cpm-usb",
2724 .data = (void *)PORT_CPM,
2725 },
2726 {},
2727};
2728
2729MODULE_DEVICE_TABLE(of, qe_udc_match);
2730
2731static struct platform_driver udc_driver = {
2732 .driver = {
2733 .name = (char *)driver_name,
2734 .owner = THIS_MODULE,
2735 .of_match_table = qe_udc_match,
2736 },
2737 .probe = qe_udc_probe,
2738 .remove = __devexit_p(qe_udc_remove),
2739#ifdef CONFIG_PM
2740 .suspend = qe_udc_suspend,
2741 .resume = qe_udc_resume,
2742#endif
2743};
2744
2745module_platform_driver(udc_driver);
2746
2747MODULE_DESCRIPTION(DRIVER_DESC);
2748MODULE_AUTHOR(DRIVER_AUTHOR);
2749MODULE_LICENSE("GPL");
2750