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perf python: Do not force closing original perf descriptor in evlist.get_pollfd()
[linux/fpc-iii.git] / drivers / usb / gadget / udc / fsl_qe_udc.c
blob2707be6282988f281e134139ea7e60d181176091
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * driver/usb/gadget/fsl_qe_udc.c
4 *
5 * Copyright (c) 2006-2008 Freescale Semiconductor, Inc. All rights reserved.
6 *
7 * Xie Xiaobo <X.Xie@freescale.com>
8 * Li Yang <leoli@freescale.com>
9 * Based on bareboard code from Shlomi Gridish.
10 *
11 * Description:
12 * Freescle QE/CPM USB Pheripheral Controller Driver
13 * The controller can be found on MPC8360, MPC8272, and etc.
14 * MPC8360 Rev 1.1 may need QE mircocode update
15 */
16
17 #undef USB_TRACE
18
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/ioport.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/err.h>
25 #include <linux/slab.h>
26 #include <linux/list.h>
27 #include <linux/interrupt.h>
28 #include <linux/io.h>
29 #include <linux/moduleparam.h>
30 #include <linux/of_address.h>
31 #include <linux/of_irq.h>
32 #include <linux/of_platform.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/usb/ch9.h>
35 #include <linux/usb/gadget.h>
36 #include <linux/usb/otg.h>
37 #include <soc/fsl/qe/qe.h>
38 #include <asm/cpm.h>
39 #include <asm/dma.h>
40 #include <asm/reg.h>
41 #include "fsl_qe_udc.h"
42
43 #define DRIVER_DESC "Freescale QE/CPM USB Device Controller driver"
44 #define DRIVER_AUTHOR "Xie XiaoBo"
45 #define DRIVER_VERSION "1.0"
46
47 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
48
49 static const char driver_name[] = "fsl_qe_udc";
50 static const char driver_desc[] = DRIVER_DESC;
51
52 /*ep name is important in gadget, it should obey the convention of ep_match()*/
53 static const char *const ep_name[] = {
54 "ep0-control", /* everyone has ep0 */
55 /* 3 configurable endpoints */
56 "ep1",
57 "ep2",
58 "ep3",
59 };
60
61 static const struct usb_endpoint_descriptor qe_ep0_desc = {
62 .bLength = USB_DT_ENDPOINT_SIZE,
63 .bDescriptorType = USB_DT_ENDPOINT,
64
65 .bEndpointAddress = 0,
66 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
67 .wMaxPacketSize = USB_MAX_CTRL_PAYLOAD,
68 };
69
70 /********************************************************************
71 * Internal Used Function Start
72 ********************************************************************/
73 /*-----------------------------------------------------------------
74 * done() - retire a request; caller blocked irqs
75 *--------------------------------------------------------------*/
76 static void done(struct qe_ep *ep, struct qe_req *req, int status)
77 {
78 struct qe_udc *udc = ep->udc;
79 unsigned char stopped = ep->stopped;
80
81 /* the req->queue pointer is used by ep_queue() func, in which
82 * the request will be added into a udc_ep->queue 'd tail
83 * so here the req will be dropped from the ep->queue
84 */
85 list_del_init(&req->queue);
86
87 /* req.status should be set as -EINPROGRESS in ep_queue() */
88 if (req->req.status == -EINPROGRESS)
89 req->req.status = status;
90 else
91 status = req->req.status;
92
93 if (req->mapped) {
94 dma_unmap_single(udc->gadget.dev.parent,
95 req->req.dma, req->req.length,
96 ep_is_in(ep)
97 ? DMA_TO_DEVICE
98 : DMA_FROM_DEVICE);
99 req->req.dma = DMA_ADDR_INVALID;
100 req->mapped = 0;
101 } else
102 dma_sync_single_for_cpu(udc->gadget.dev.parent,
103 req->req.dma, req->req.length,
104 ep_is_in(ep)
105 ? DMA_TO_DEVICE
106 : DMA_FROM_DEVICE);
107
108 if (status && (status != -ESHUTDOWN))
109 dev_vdbg(udc->dev, "complete %s req %p stat %d len %u/%u\n",
110 ep->ep.name, &req->req, status,
111 req->req.actual, req->req.length);
112
113 /* don't modify queue heads during completion callback */
114 ep->stopped = 1;
115 spin_unlock(&udc->lock);
116
117 usb_gadget_giveback_request(&ep->ep, &req->req);
118
119 spin_lock(&udc->lock);
120
121 ep->stopped = stopped;
122 }
123
124 /*-----------------------------------------------------------------
125 * nuke(): delete all requests related to this ep
126 *--------------------------------------------------------------*/
127 static void nuke(struct qe_ep *ep, int status)
128 {
129 /* Whether this eq has request linked */
130 while (!list_empty(&ep->queue)) {
131 struct qe_req *req = NULL;
132 req = list_entry(ep->queue.next, struct qe_req, queue);
133
134 done(ep, req, status);
135 }
136 }
137
138 /*---------------------------------------------------------------------------*
139 * USB and Endpoint manipulate process, include parameter and register *
140 *---------------------------------------------------------------------------*/
141 /* @value: 1--set stall 0--clean stall */
142 static int qe_eprx_stall_change(struct qe_ep *ep, int value)
143 {
144 u16 tem_usep;
145 u8 epnum = ep->epnum;
146 struct qe_udc *udc = ep->udc;
147
148 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
149 tem_usep = tem_usep & ~USB_RHS_MASK;
150 if (value == 1)
151 tem_usep |= USB_RHS_STALL;
152 else if (ep->dir == USB_DIR_IN)
153 tem_usep |= USB_RHS_IGNORE_OUT;
154
155 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
156 return 0;
157 }
158
159 static int qe_eptx_stall_change(struct qe_ep *ep, int value)
160 {
161 u16 tem_usep;
162 u8 epnum = ep->epnum;
163 struct qe_udc *udc = ep->udc;
164
165 tem_usep = in_be16(&udc->usb_regs->usb_usep[epnum]);
166 tem_usep = tem_usep & ~USB_THS_MASK;
167 if (value == 1)
168 tem_usep |= USB_THS_STALL;
169 else if (ep->dir == USB_DIR_OUT)
170 tem_usep |= USB_THS_IGNORE_IN;
171
172 out_be16(&udc->usb_regs->usb_usep[epnum], tem_usep);
173
174 return 0;
175 }
176
177 static int qe_ep0_stall(struct qe_udc *udc)
178 {
179 qe_eptx_stall_change(&udc->eps[0], 1);
180 qe_eprx_stall_change(&udc->eps[0], 1);
181 udc->ep0_state = WAIT_FOR_SETUP;
182 udc->ep0_dir = 0;
183 return 0;
184 }
185
186 static int qe_eprx_nack(struct qe_ep *ep)
187 {
188 u8 epnum = ep->epnum;
189 struct qe_udc *udc = ep->udc;
190
191 if (ep->state == EP_STATE_IDLE) {
192 /* Set the ep's nack */
193 clrsetbits_be16(&udc->usb_regs->usb_usep[epnum],
194 USB_RHS_MASK, USB_RHS_NACK);
195
196 /* Mask Rx and Busy interrupts */
197 clrbits16(&udc->usb_regs->usb_usbmr,
198 (USB_E_RXB_MASK | USB_E_BSY_MASK));
199
200 ep->state = EP_STATE_NACK;
201 }
202 return 0;
203 }
204
205 static int qe_eprx_normal(struct qe_ep *ep)
206 {
207 struct qe_udc *udc = ep->udc;
208
209 if (ep->state == EP_STATE_NACK) {
210 clrsetbits_be16(&udc->usb_regs->usb_usep[ep->epnum],
211 USB_RTHS_MASK, USB_THS_IGNORE_IN);
212
213 /* Unmask RX interrupts */
214 out_be16(&udc->usb_regs->usb_usber,
215 USB_E_BSY_MASK | USB_E_RXB_MASK);
216 setbits16(&udc->usb_regs->usb_usbmr,
217 (USB_E_RXB_MASK | USB_E_BSY_MASK));
218
219 ep->state = EP_STATE_IDLE;
220 ep->has_data = 0;
221 }
222
223 return 0;
224 }
225
226 static int qe_ep_cmd_stoptx(struct qe_ep *ep)
227 {
228 if (ep->udc->soc_type == PORT_CPM)
229 cpm_command(CPM_USB_STOP_TX | (ep->epnum << CPM_USB_EP_SHIFT),
230 CPM_USB_STOP_TX_OPCODE);
231 else
232 qe_issue_cmd(QE_USB_STOP_TX, QE_CR_SUBBLOCK_USB,
233 ep->epnum, 0);
234
235 return 0;
236 }
237
238 static int qe_ep_cmd_restarttx(struct qe_ep *ep)
239 {
240 if (ep->udc->soc_type == PORT_CPM)
241 cpm_command(CPM_USB_RESTART_TX | (ep->epnum <<
242 CPM_USB_EP_SHIFT), CPM_USB_RESTART_TX_OPCODE);
243 else
244 qe_issue_cmd(QE_USB_RESTART_TX, QE_CR_SUBBLOCK_USB,
245 ep->epnum, 0);
246
247 return 0;
248 }
249
250 static int qe_ep_flushtxfifo(struct qe_ep *ep)
251 {
252 struct qe_udc *udc = ep->udc;
253 int i;
254
255 i = (int)ep->epnum;
256
257 qe_ep_cmd_stoptx(ep);
258 out_8(&udc->usb_regs->usb_uscom,
259 USB_CMD_FLUSH_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
260 out_be16(&udc->ep_param[i]->tbptr, in_be16(&udc->ep_param[i]->tbase));
261 out_be32(&udc->ep_param[i]->tstate, 0);
262 out_be16(&udc->ep_param[i]->tbcnt, 0);
263
264 ep->c_txbd = ep->txbase;
265 ep->n_txbd = ep->txbase;
266 qe_ep_cmd_restarttx(ep);
267 return 0;
268 }
269
270 static int qe_ep_filltxfifo(struct qe_ep *ep)
271 {
272 struct qe_udc *udc = ep->udc;
273
274 out_8(&udc->usb_regs->usb_uscom,
275 USB_CMD_STR_FIFO | (USB_CMD_EP_MASK & (ep->epnum)));
276 return 0;
277 }
278
279 static int qe_epbds_reset(struct qe_udc *udc, int pipe_num)
280 {
281 struct qe_ep *ep;
282 u32 bdring_len;
283 struct qe_bd __iomem *bd;
284 int i;
285
286 ep = &udc->eps[pipe_num];
287
288 if (ep->dir == USB_DIR_OUT)
289 bdring_len = USB_BDRING_LEN_RX;
290 else
291 bdring_len = USB_BDRING_LEN;
292
293 bd = ep->rxbase;
294 for (i = 0; i < (bdring_len - 1); i++) {
295 out_be32((u32 __iomem *)bd, R_E | R_I);
296 bd++;
297 }
298 out_be32((u32 __iomem *)bd, R_E | R_I | R_W);
299
300 bd = ep->txbase;
301 for (i = 0; i < USB_BDRING_LEN_TX - 1; i++) {
302 out_be32(&bd->buf, 0);
303 out_be32((u32 __iomem *)bd, 0);
304 bd++;
305 }
306 out_be32((u32 __iomem *)bd, T_W);
307
308 return 0;
309 }
310
311 static int qe_ep_reset(struct qe_udc *udc, int pipe_num)
312 {
313 struct qe_ep *ep;
314 u16 tmpusep;
315
316 ep = &udc->eps[pipe_num];
317 tmpusep = in_be16(&udc->usb_regs->usb_usep[pipe_num]);
318 tmpusep &= ~USB_RTHS_MASK;
319
320 switch (ep->dir) {
321 case USB_DIR_BOTH:
322 qe_ep_flushtxfifo(ep);
323 break;
324 case USB_DIR_OUT:
325 tmpusep |= USB_THS_IGNORE_IN;
326 break;
327 case USB_DIR_IN:
328 qe_ep_flushtxfifo(ep);
329 tmpusep |= USB_RHS_IGNORE_OUT;
330 break;
331 default:
332 break;
333 }
334 out_be16(&udc->usb_regs->usb_usep[pipe_num], tmpusep);
335
336 qe_epbds_reset(udc, pipe_num);
337
338 return 0;
339 }
340
341 static int qe_ep_toggledata01(struct qe_ep *ep)
342 {
343 ep->data01 ^= 0x1;
344 return 0;
345 }
346
347 static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
348 {
349 struct qe_ep *ep = &udc->eps[pipe_num];
350 unsigned long tmp_addr = 0;
351 struct usb_ep_para __iomem *epparam;
352 int i;
353 struct qe_bd __iomem *bd;
354 int bdring_len;
355
356 if (ep->dir == USB_DIR_OUT)
357 bdring_len = USB_BDRING_LEN_RX;
358 else
359 bdring_len = USB_BDRING_LEN;
360
361 epparam = udc->ep_param[pipe_num];
362 /* alloc multi-ram for BD rings and set the ep parameters */
363 tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
364 USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
365 if (IS_ERR_VALUE(tmp_addr))
366 return -ENOMEM;
367
368 out_be16(&epparam->rbase, (u16)tmp_addr);
369 out_be16(&epparam->tbase, (u16)(tmp_addr +
370 (sizeof(struct qe_bd) * bdring_len)));
371
372 out_be16(&epparam->rbptr, in_be16(&epparam->rbase));
373 out_be16(&epparam->tbptr, in_be16(&epparam->tbase));
374
375 ep->rxbase = cpm_muram_addr(tmp_addr);
376 ep->txbase = cpm_muram_addr(tmp_addr + (sizeof(struct qe_bd)
377 * bdring_len));
378 ep->n_rxbd = ep->rxbase;
379 ep->e_rxbd = ep->rxbase;
380 ep->n_txbd = ep->txbase;
381 ep->c_txbd = ep->txbase;
382 ep->data01 = 0; /* data0 */
383
384 /* Init TX and RX bds */
385 bd = ep->rxbase;
386 for (i = 0; i < bdring_len - 1; i++) {
387 out_be32(&bd->buf, 0);
388 out_be32((u32 __iomem *)bd, 0);
389 bd++;
390 }
391 out_be32(&bd->buf, 0);
392 out_be32((u32 __iomem *)bd, R_W);
393
394 bd = ep->txbase;
395 for (i = 0; i < USB_BDRING_LEN_TX - 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, T_W);
402
403 return 0;
404 }
405
406 static int qe_ep_rxbd_update(struct qe_ep *ep)
407 {
408 unsigned int size;
409 int i;
410 unsigned int tmp;
411 struct qe_bd __iomem *bd;
412 unsigned int bdring_len;
413
414 if (ep->rxbase == NULL)
415 return -EINVAL;
416
417 bd = ep->rxbase;
418
419 ep->rxframe = kmalloc(sizeof(*ep->rxframe), GFP_ATOMIC);
420 if (!ep->rxframe)
421 return -ENOMEM;
422
423 qe_frame_init(ep->rxframe);
424
425 if (ep->dir == USB_DIR_OUT)
426 bdring_len = USB_BDRING_LEN_RX;
427 else
428 bdring_len = USB_BDRING_LEN;
429
430 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (bdring_len + 1);
431 ep->rxbuffer = kzalloc(size, GFP_ATOMIC);
432 if (!ep->rxbuffer) {
433 kfree(ep->rxframe);
434 return -ENOMEM;
435 }
436
437 ep->rxbuf_d = virt_to_phys((void *)ep->rxbuffer);
438 if (ep->rxbuf_d == DMA_ADDR_INVALID) {
439 ep->rxbuf_d = dma_map_single(ep->udc->gadget.dev.parent,
440 ep->rxbuffer,
441 size,
442 DMA_FROM_DEVICE);
443 ep->rxbufmap = 1;
444 } else {
445 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
446 ep->rxbuf_d, size,
447 DMA_FROM_DEVICE);
448 ep->rxbufmap = 0;
449 }
450
451 size = ep->ep.maxpacket + USB_CRC_SIZE + 2;
452 tmp = ep->rxbuf_d;
453 tmp = (u32)(((tmp >> 2) << 2) + 4);
454
455 for (i = 0; i < bdring_len - 1; i++) {
456 out_be32(&bd->buf, tmp);
457 out_be32((u32 __iomem *)bd, (R_E | R_I));
458 tmp = tmp + size;
459 bd++;
460 }
461 out_be32(&bd->buf, tmp);
462 out_be32((u32 __iomem *)bd, (R_E | R_I | R_W));
463
464 return 0;
465 }
466
467 static int qe_ep_register_init(struct qe_udc *udc, unsigned char pipe_num)
468 {
469 struct qe_ep *ep = &udc->eps[pipe_num];
470 struct usb_ep_para __iomem *epparam;
471 u16 usep, logepnum;
472 u16 tmp;
473 u8 rtfcr = 0;
474
475 epparam = udc->ep_param[pipe_num];
476
477 usep = 0;
478 logepnum = (ep->ep.desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
479 usep |= (logepnum << USB_EPNUM_SHIFT);
480
481 switch (ep->ep.desc->bmAttributes & 0x03) {
482 case USB_ENDPOINT_XFER_BULK:
483 usep |= USB_TRANS_BULK;
484 break;
485 case USB_ENDPOINT_XFER_ISOC:
486 usep |= USB_TRANS_ISO;
487 break;
488 case USB_ENDPOINT_XFER_INT:
489 usep |= USB_TRANS_INT;
490 break;
491 default:
492 usep |= USB_TRANS_CTR;
493 break;
494 }
495
496 switch (ep->dir) {
497 case USB_DIR_OUT:
498 usep |= USB_THS_IGNORE_IN;
499 break;
500 case USB_DIR_IN:
501 usep |= USB_RHS_IGNORE_OUT;
502 break;
503 default:
504 break;
505 }
506 out_be16(&udc->usb_regs->usb_usep[pipe_num], usep);
507
508 rtfcr = 0x30;
509 out_8(&epparam->rbmr, rtfcr);
510 out_8(&epparam->tbmr, rtfcr);
511
512 tmp = (u16)(ep->ep.maxpacket + USB_CRC_SIZE);
513 /* MRBLR must be divisble by 4 */
514 tmp = (u16)(((tmp >> 2) << 2) + 4);
515 out_be16(&epparam->mrblr, tmp);
516
517 return 0;
518 }
519
520 static int qe_ep_init(struct qe_udc *udc,
521 unsigned char pipe_num,
522 const struct usb_endpoint_descriptor *desc)
523 {
524 struct qe_ep *ep = &udc->eps[pipe_num];
525 unsigned long flags;
526 int reval = 0;
527 u16 max = 0;
528
529 max = usb_endpoint_maxp(desc);
530
531 /* check the max package size validate for this endpoint */
532 /* Refer to USB2.0 spec table 9-13,
533 */
534 if (pipe_num != 0) {
535 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
536 case USB_ENDPOINT_XFER_BULK:
537 if (strstr(ep->ep.name, "-iso")
538 || strstr(ep->ep.name, "-int"))
539 goto en_done;
540 switch (udc->gadget.speed) {
541 case USB_SPEED_HIGH:
542 if ((max == 128) || (max == 256) || (max == 512))
543 break;
544 default:
545 switch (max) {
546 case 4:
547 case 8:
548 case 16:
549 case 32:
550 case 64:
551 break;
552 default:
553 case USB_SPEED_LOW:
554 goto en_done;
555 }
556 }
557 break;
558 case USB_ENDPOINT_XFER_INT:
559 if (strstr(ep->ep.name, "-iso")) /* bulk is ok */
560 goto en_done;
561 switch (udc->gadget.speed) {
562 case USB_SPEED_HIGH:
563 if (max <= 1024)
564 break;
565 case USB_SPEED_FULL:
566 if (max <= 64)
567 break;
568 default:
569 if (max <= 8)
570 break;
571 goto en_done;
572 }
573 break;
574 case USB_ENDPOINT_XFER_ISOC:
575 if (strstr(ep->ep.name, "-bulk")
576 || strstr(ep->ep.name, "-int"))
577 goto en_done;
578 switch (udc->gadget.speed) {
579 case USB_SPEED_HIGH:
580 if (max <= 1024)
581 break;
582 case USB_SPEED_FULL:
583 if (max <= 1023)
584 break;
585 default:
586 goto en_done;
587 }
588 break;
589 case USB_ENDPOINT_XFER_CONTROL:
590 if (strstr(ep->ep.name, "-iso")
591 || strstr(ep->ep.name, "-int"))
592 goto en_done;
593 switch (udc->gadget.speed) {
594 case USB_SPEED_HIGH:
595 case USB_SPEED_FULL:
596 switch (max) {
597 case 1:
598 case 2:
599 case 4:
600 case 8:
601 case 16:
602 case 32:
603 case 64:
604 break;
605 default:
606 goto en_done;
607 }
608 case USB_SPEED_LOW:
609 switch (max) {
610 case 1:
611 case 2:
612 case 4:
613 case 8:
614 break;
615 default:
616 goto en_done;
617 }
618 default:
619 goto en_done;
620 }
621 break;
622
623 default:
624 goto en_done;
625 }
626 } /* if ep0*/
627
628 spin_lock_irqsave(&udc->lock, flags);
629
630 /* initialize ep structure */
631 ep->ep.maxpacket = max;
632 ep->tm = (u8)(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
633 ep->ep.desc = desc;
634 ep->stopped = 0;
635 ep->init = 1;
636
637 if (pipe_num == 0) {
638 ep->dir = USB_DIR_BOTH;
639 udc->ep0_dir = USB_DIR_OUT;
640 udc->ep0_state = WAIT_FOR_SETUP;
641 } else {
642 switch (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
643 case USB_DIR_OUT:
644 ep->dir = USB_DIR_OUT;
645 break;
646 case USB_DIR_IN:
647 ep->dir = USB_DIR_IN;
648 default:
649 break;
650 }
651 }
652
653 /* hardware special operation */
654 qe_ep_bd_init(udc, pipe_num);
655 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_OUT)) {
656 reval = qe_ep_rxbd_update(ep);
657 if (reval)
658 goto en_done1;
659 }
660
661 if ((ep->tm == USBP_TM_CTL) || (ep->dir == USB_DIR_IN)) {
662 ep->txframe = kmalloc(sizeof(*ep->txframe), GFP_ATOMIC);
663 if (!ep->txframe)
664 goto en_done2;
665 qe_frame_init(ep->txframe);
666 }
667
668 qe_ep_register_init(udc, pipe_num);
669
670 /* Now HW will be NAKing transfers to that EP,
671 * until a buffer is queued to it. */
672 spin_unlock_irqrestore(&udc->lock, flags);
673
674 return 0;
675 en_done2:
676 kfree(ep->rxbuffer);
677 kfree(ep->rxframe);
678 en_done1:
679 spin_unlock_irqrestore(&udc->lock, flags);
680 en_done:
681 dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
682 return -ENODEV;
683 }
684
685 static inline void qe_usb_enable(struct qe_udc *udc)
686 {
687 setbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
688 }
689
690 static inline void qe_usb_disable(struct qe_udc *udc)
691 {
692 clrbits8(&udc->usb_regs->usb_usmod, USB_MODE_EN);
693 }
694
695 /*----------------------------------------------------------------------------*
696 * USB and EP basic manipulate function end *
697 *----------------------------------------------------------------------------*/
698
699
700 /******************************************************************************
701 UDC transmit and receive process
702 ******************************************************************************/
703 static void recycle_one_rxbd(struct qe_ep *ep)
704 {
705 u32 bdstatus;
706
707 bdstatus = in_be32((u32 __iomem *)ep->e_rxbd);
708 bdstatus = R_I | R_E | (bdstatus & R_W);
709 out_be32((u32 __iomem *)ep->e_rxbd, bdstatus);
710
711 if (bdstatus & R_W)
712 ep->e_rxbd = ep->rxbase;
713 else
714 ep->e_rxbd++;
715 }
716
717 static void recycle_rxbds(struct qe_ep *ep, unsigned char stopatnext)
718 {
719 u32 bdstatus;
720 struct qe_bd __iomem *bd, *nextbd;
721 unsigned char stop = 0;
722
723 nextbd = ep->n_rxbd;
724 bd = ep->e_rxbd;
725 bdstatus = in_be32((u32 __iomem *)bd);
726
727 while (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK) && !stop) {
728 bdstatus = R_E | R_I | (bdstatus & R_W);
729 out_be32((u32 __iomem *)bd, bdstatus);
730
731 if (bdstatus & R_W)
732 bd = ep->rxbase;
733 else
734 bd++;
735
736 bdstatus = in_be32((u32 __iomem *)bd);
737 if (stopatnext && (bd == nextbd))
738 stop = 1;
739 }
740
741 ep->e_rxbd = bd;
742 }
743
744 static void ep_recycle_rxbds(struct qe_ep *ep)
745 {
746 struct qe_bd __iomem *bd = ep->n_rxbd;
747 u32 bdstatus;
748 u8 epnum = ep->epnum;
749 struct qe_udc *udc = ep->udc;
750
751 bdstatus = in_be32((u32 __iomem *)bd);
752 if (!(bdstatus & R_E) && !(bdstatus & BD_LENGTH_MASK)) {
753 bd = ep->rxbase +
754 ((in_be16(&udc->ep_param[epnum]->rbptr) -
755 in_be16(&udc->ep_param[epnum]->rbase))
756 >> 3);
757 bdstatus = in_be32((u32 __iomem *)bd);
758
759 if (bdstatus & R_W)
760 bd = ep->rxbase;
761 else
762 bd++;
763
764 ep->e_rxbd = bd;
765 recycle_rxbds(ep, 0);
766 ep->e_rxbd = ep->n_rxbd;
767 } else
768 recycle_rxbds(ep, 1);
769
770 if (in_be16(&udc->usb_regs->usb_usber) & USB_E_BSY_MASK)
771 out_be16(&udc->usb_regs->usb_usber, USB_E_BSY_MASK);
772
773 if (ep->has_data <= 0 && (!list_empty(&ep->queue)))
774 qe_eprx_normal(ep);
775
776 ep->localnack = 0;
777 }
778
779 static void setup_received_handle(struct qe_udc *udc,
780 struct usb_ctrlrequest *setup);
781 static int qe_ep_rxframe_handle(struct qe_ep *ep);
782 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req);
783 /* when BD PID is setup, handle the packet */
784 static int ep0_setup_handle(struct qe_udc *udc)
785 {
786 struct qe_ep *ep = &udc->eps[0];
787 struct qe_frame *pframe;
788 unsigned int fsize;
789 u8 *cp;
790
791 pframe = ep->rxframe;
792 if ((frame_get_info(pframe) & PID_SETUP)
793 && (udc->ep0_state == WAIT_FOR_SETUP)) {
794 fsize = frame_get_length(pframe);
795 if (unlikely(fsize != 8))
796 return -EINVAL;
797 cp = (u8 *)&udc->local_setup_buff;
798 memcpy(cp, pframe->data, fsize);
799 ep->data01 = 1;
800
801 /* handle the usb command base on the usb_ctrlrequest */
802 setup_received_handle(udc, &udc->local_setup_buff);
803 return 0;
804 }
805 return -EINVAL;
806 }
807
808 static int qe_ep0_rx(struct qe_udc *udc)
809 {
810 struct qe_ep *ep = &udc->eps[0];
811 struct qe_frame *pframe;
812 struct qe_bd __iomem *bd;
813 u32 bdstatus, length;
814 u32 vaddr;
815
816 pframe = ep->rxframe;
817
818 if (ep->dir == USB_DIR_IN) {
819 dev_err(udc->dev, "ep0 not a control endpoint\n");
820 return -EINVAL;
821 }
822
823 bd = ep->n_rxbd;
824 bdstatus = in_be32((u32 __iomem *)bd);
825 length = bdstatus & BD_LENGTH_MASK;
826
827 while (!(bdstatus & R_E) && length) {
828 if ((bdstatus & R_F) && (bdstatus & R_L)
829 && !(bdstatus & R_ERROR)) {
830 if (length == USB_CRC_SIZE) {
831 udc->ep0_state = WAIT_FOR_SETUP;
832 dev_vdbg(udc->dev,
833 "receive a ZLP in status phase\n");
834 } else {
835 qe_frame_clean(pframe);
836 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
837 frame_set_data(pframe, (u8 *)vaddr);
838 frame_set_length(pframe,
839 (length - USB_CRC_SIZE));
840 frame_set_status(pframe, FRAME_OK);
841 switch (bdstatus & R_PID) {
842 case R_PID_SETUP:
843 frame_set_info(pframe, PID_SETUP);
844 break;
845 case R_PID_DATA1:
846 frame_set_info(pframe, PID_DATA1);
847 break;
848 default:
849 frame_set_info(pframe, PID_DATA0);
850 break;
851 }
852
853 if ((bdstatus & R_PID) == R_PID_SETUP)
854 ep0_setup_handle(udc);
855 else
856 qe_ep_rxframe_handle(ep);
857 }
858 } else {
859 dev_err(udc->dev, "The receive frame with error!\n");
860 }
861
862 /* note: don't clear the rxbd's buffer address */
863 recycle_one_rxbd(ep);
864
865 /* Get next BD */
866 if (bdstatus & R_W)
867 bd = ep->rxbase;
868 else
869 bd++;
870
871 bdstatus = in_be32((u32 __iomem *)bd);
872 length = bdstatus & BD_LENGTH_MASK;
873
874 }
875
876 ep->n_rxbd = bd;
877
878 return 0;
879 }
880
881 static int qe_ep_rxframe_handle(struct qe_ep *ep)
882 {
883 struct qe_frame *pframe;
884 u8 framepid = 0;
885 unsigned int fsize;
886 u8 *cp;
887 struct qe_req *req;
888
889 pframe = ep->rxframe;
890
891 if (frame_get_info(pframe) & PID_DATA1)
892 framepid = 0x1;
893
894 if (framepid != ep->data01) {
895 dev_err(ep->udc->dev, "the data01 error!\n");
896 return -EIO;
897 }
898
899 fsize = frame_get_length(pframe);
900 if (list_empty(&ep->queue)) {
901 dev_err(ep->udc->dev, "the %s have no requeue!\n", ep->name);
902 } else {
903 req = list_entry(ep->queue.next, struct qe_req, queue);
904
905 cp = (u8 *)(req->req.buf) + req->req.actual;
906 if (cp) {
907 memcpy(cp, pframe->data, fsize);
908 req->req.actual += fsize;
909 if ((fsize < ep->ep.maxpacket) ||
910 (req->req.actual >= req->req.length)) {
911 if (ep->epnum == 0)
912 ep0_req_complete(ep->udc, req);
913 else
914 done(ep, req, 0);
915 if (list_empty(&ep->queue) && ep->epnum != 0)
916 qe_eprx_nack(ep);
917 }
918 }
919 }
920
921 qe_ep_toggledata01(ep);
922
923 return 0;
924 }
925
926 static void ep_rx_tasklet(unsigned long data)
927 {
928 struct qe_udc *udc = (struct qe_udc *)data;
929 struct qe_ep *ep;
930 struct qe_frame *pframe;
931 struct qe_bd __iomem *bd;
932 unsigned long flags;
933 u32 bdstatus, length;
934 u32 vaddr, i;
935
936 spin_lock_irqsave(&udc->lock, flags);
937
938 for (i = 1; i < USB_MAX_ENDPOINTS; i++) {
939 ep = &udc->eps[i];
940
941 if (ep->dir == USB_DIR_IN || ep->enable_tasklet == 0) {
942 dev_dbg(udc->dev,
943 "This is a transmit ep or disable tasklet!\n");
944 continue;
945 }
946
947 pframe = ep->rxframe;
948 bd = ep->n_rxbd;
949 bdstatus = in_be32((u32 __iomem *)bd);
950 length = bdstatus & BD_LENGTH_MASK;
951
952 while (!(bdstatus & R_E) && length) {
953 if (list_empty(&ep->queue)) {
954 qe_eprx_nack(ep);
955 dev_dbg(udc->dev,
956 "The rxep have noreq %d\n",
957 ep->has_data);
958 break;
959 }
960
961 if ((bdstatus & R_F) && (bdstatus & R_L)
962 && !(bdstatus & R_ERROR)) {
963 qe_frame_clean(pframe);
964 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
965 frame_set_data(pframe, (u8 *)vaddr);
966 frame_set_length(pframe,
967 (length - USB_CRC_SIZE));
968 frame_set_status(pframe, FRAME_OK);
969 switch (bdstatus & R_PID) {
970 case R_PID_DATA1:
971 frame_set_info(pframe, PID_DATA1);
972 break;
973 case R_PID_SETUP:
974 frame_set_info(pframe, PID_SETUP);
975 break;
976 default:
977 frame_set_info(pframe, PID_DATA0);
978 break;
979 }
980 /* handle the rx frame */
981 qe_ep_rxframe_handle(ep);
982 } else {
983 dev_err(udc->dev,
984 "error in received frame\n");
985 }
986 /* note: don't clear the rxbd's buffer address */
987 /*clear the length */
988 out_be32((u32 __iomem *)bd, bdstatus & BD_STATUS_MASK);
989 ep->has_data--;
990 if (!(ep->localnack))
991 recycle_one_rxbd(ep);
992
993 /* Get next BD */
994 if (bdstatus & R_W)
995 bd = ep->rxbase;
996 else
997 bd++;
998
999 bdstatus = in_be32((u32 __iomem *)bd);
1000 length = bdstatus & BD_LENGTH_MASK;
1001 }
1002
1003 ep->n_rxbd = bd;
1004
1005 if (ep->localnack)
1006 ep_recycle_rxbds(ep);
1007
1008 ep->enable_tasklet = 0;
1009 } /* for i=1 */
1010
1011 spin_unlock_irqrestore(&udc->lock, flags);
1012 }
1013
1014 static int qe_ep_rx(struct qe_ep *ep)
1015 {
1016 struct qe_udc *udc;
1017 struct qe_frame *pframe;
1018 struct qe_bd __iomem *bd;
1019 u16 swoffs, ucoffs, emptybds;
1020
1021 udc = ep->udc;
1022 pframe = ep->rxframe;
1023
1024 if (ep->dir == USB_DIR_IN) {
1025 dev_err(udc->dev, "transmit ep in rx function\n");
1026 return -EINVAL;
1027 }
1028
1029 bd = ep->n_rxbd;
1030
1031 swoffs = (u16)(bd - ep->rxbase);
1032 ucoffs = (u16)((in_be16(&udc->ep_param[ep->epnum]->rbptr) -
1033 in_be16(&udc->ep_param[ep->epnum]->rbase)) >> 3);
1034 if (swoffs < ucoffs)
1035 emptybds = USB_BDRING_LEN_RX - ucoffs + swoffs;
1036 else
1037 emptybds = swoffs - ucoffs;
1038
1039 if (emptybds < MIN_EMPTY_BDS) {
1040 qe_eprx_nack(ep);
1041 ep->localnack = 1;
1042 dev_vdbg(udc->dev, "%d empty bds, send NACK\n", emptybds);
1043 }
1044 ep->has_data = USB_BDRING_LEN_RX - emptybds;
1045
1046 if (list_empty(&ep->queue)) {
1047 qe_eprx_nack(ep);
1048 dev_vdbg(udc->dev, "The rxep have no req queued with %d BDs\n",
1049 ep->has_data);
1050 return 0;
1051 }
1052
1053 tasklet_schedule(&udc->rx_tasklet);
1054 ep->enable_tasklet = 1;
1055
1056 return 0;
1057 }
1058
1059 /* send data from a frame, no matter what tx_req */
1060 static int qe_ep_tx(struct qe_ep *ep, struct qe_frame *frame)
1061 {
1062 struct qe_udc *udc = ep->udc;
1063 struct qe_bd __iomem *bd;
1064 u16 saveusbmr;
1065 u32 bdstatus, pidmask;
1066 u32 paddr;
1067
1068 if (ep->dir == USB_DIR_OUT) {
1069 dev_err(udc->dev, "receive ep passed to tx function\n");
1070 return -EINVAL;
1071 }
1072
1073 /* Disable the Tx interrupt */
1074 saveusbmr = in_be16(&udc->usb_regs->usb_usbmr);
1075 out_be16(&udc->usb_regs->usb_usbmr,
1076 saveusbmr & ~(USB_E_TXB_MASK | USB_E_TXE_MASK));
1077
1078 bd = ep->n_txbd;
1079 bdstatus = in_be32((u32 __iomem *)bd);
1080
1081 if (!(bdstatus & (T_R | BD_LENGTH_MASK))) {
1082 if (frame_get_length(frame) == 0) {
1083 frame_set_data(frame, udc->nullbuf);
1084 frame_set_length(frame, 2);
1085 frame->info |= (ZLP | NO_CRC);
1086 dev_vdbg(udc->dev, "the frame size = 0\n");
1087 }
1088 paddr = virt_to_phys((void *)frame->data);
1089 out_be32(&bd->buf, paddr);
1090 bdstatus = (bdstatus&T_W);
1091 if (!(frame_get_info(frame) & NO_CRC))
1092 bdstatus |= T_R | T_I | T_L | T_TC
1093 | frame_get_length(frame);
1094 else
1095 bdstatus |= T_R | T_I | T_L | frame_get_length(frame);
1096
1097 /* if the packet is a ZLP in status phase */
1098 if ((ep->epnum == 0) && (udc->ep0_state == DATA_STATE_NEED_ZLP))
1099 ep->data01 = 0x1;
1100
1101 if (ep->data01) {
1102 pidmask = T_PID_DATA1;
1103 frame->info |= PID_DATA1;
1104 } else {
1105 pidmask = T_PID_DATA0;
1106 frame->info |= PID_DATA0;
1107 }
1108 bdstatus |= T_CNF;
1109 bdstatus |= pidmask;
1110 out_be32((u32 __iomem *)bd, bdstatus);
1111 qe_ep_filltxfifo(ep);
1112
1113 /* enable the TX interrupt */
1114 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1115
1116 qe_ep_toggledata01(ep);
1117 if (bdstatus & T_W)
1118 ep->n_txbd = ep->txbase;
1119 else
1120 ep->n_txbd++;
1121
1122 return 0;
1123 } else {
1124 out_be16(&udc->usb_regs->usb_usbmr, saveusbmr);
1125 dev_vdbg(udc->dev, "The tx bd is not ready!\n");
1126 return -EBUSY;
1127 }
1128 }
1129
1130 /* when a bd was transmitted, the function can
1131 * handle the tx_req, not include ep0 */
1132 static int txcomplete(struct qe_ep *ep, unsigned char restart)
1133 {
1134 if (ep->tx_req != NULL) {
1135 struct qe_req *req = ep->tx_req;
1136 unsigned zlp = 0, last_len = 0;
1137
1138 last_len = min_t(unsigned, req->req.length - ep->sent,
1139 ep->ep.maxpacket);
1140
1141 if (!restart) {
1142 int asent = ep->last;
1143 ep->sent += asent;
1144 ep->last -= asent;
1145 } else {
1146 ep->last = 0;
1147 }
1148
1149 /* zlp needed when req->re.zero is set */
1150 if (req->req.zero) {
1151 if (last_len == 0 ||
1152 (req->req.length % ep->ep.maxpacket) != 0)
1153 zlp = 0;
1154 else
1155 zlp = 1;
1156 } else
1157 zlp = 0;
1158
1159 /* a request already were transmitted completely */
1160 if (((ep->tx_req->req.length - ep->sent) <= 0) && !zlp) {
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 ep->tx_req->req.actual += size;
1194 frame_set_data(frame, buf);
1195 frame_set_length(frame, size);
1196 frame_set_status(frame, FRAME_OK);
1197 frame_set_info(frame, 0);
1198 return qe_ep_tx(ep, frame);
1199 }
1200 return -EIO;
1201 }
1202
1203 /* give a frame struct,send a ZLP */
1204 static int sendnulldata(struct qe_ep *ep, struct qe_frame *frame, uint infor)
1205 {
1206 struct qe_udc *udc = ep->udc;
1207
1208 if (frame == NULL)
1209 return -ENODEV;
1210
1211 qe_frame_clean(frame);
1212 frame_set_data(frame, (u8 *)udc->nullbuf);
1213 frame_set_length(frame, 2);
1214 frame_set_status(frame, FRAME_OK);
1215 frame_set_info(frame, (ZLP | NO_CRC | infor));
1216
1217 return qe_ep_tx(ep, frame);
1218 }
1219
1220 static int frame_create_tx(struct qe_ep *ep, struct qe_frame *frame)
1221 {
1222 struct qe_req *req = ep->tx_req;
1223 int reval;
1224
1225 if (req == NULL)
1226 return -ENODEV;
1227
1228 if ((req->req.length - ep->sent) > 0)
1229 reval = qe_usb_senddata(ep, frame);
1230 else
1231 reval = sendnulldata(ep, frame, 0);
1232
1233 return reval;
1234 }
1235
1236 /* if direction is DIR_IN, the status is Device->Host
1237 * if direction is DIR_OUT, the status transaction is Device<-Host
1238 * in status phase, udc create a request and gain status */
1239 static int ep0_prime_status(struct qe_udc *udc, int direction)
1240 {
1241
1242 struct qe_ep *ep = &udc->eps[0];
1243
1244 if (direction == USB_DIR_IN) {
1245 udc->ep0_state = DATA_STATE_NEED_ZLP;
1246 udc->ep0_dir = USB_DIR_IN;
1247 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1248 } else {
1249 udc->ep0_dir = USB_DIR_OUT;
1250 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1251 }
1252
1253 return 0;
1254 }
1255
1256 /* a request complete in ep0, whether gadget request or udc request */
1257 static void ep0_req_complete(struct qe_udc *udc, struct qe_req *req)
1258 {
1259 struct qe_ep *ep = &udc->eps[0];
1260 /* because usb and ep's status already been set in ch9setaddress() */
1261
1262 switch (udc->ep0_state) {
1263 case DATA_STATE_XMIT:
1264 done(ep, req, 0);
1265 /* receive status phase */
1266 if (ep0_prime_status(udc, USB_DIR_OUT))
1267 qe_ep0_stall(udc);
1268 break;
1269
1270 case DATA_STATE_NEED_ZLP:
1271 done(ep, req, 0);
1272 udc->ep0_state = WAIT_FOR_SETUP;
1273 break;
1274
1275 case DATA_STATE_RECV:
1276 done(ep, req, 0);
1277 /* send status phase */
1278 if (ep0_prime_status(udc, USB_DIR_IN))
1279 qe_ep0_stall(udc);
1280 break;
1281
1282 case WAIT_FOR_OUT_STATUS:
1283 done(ep, req, 0);
1284 udc->ep0_state = WAIT_FOR_SETUP;
1285 break;
1286
1287 case WAIT_FOR_SETUP:
1288 dev_vdbg(udc->dev, "Unexpected interrupt\n");
1289 break;
1290
1291 default:
1292 qe_ep0_stall(udc);
1293 break;
1294 }
1295 }
1296
1297 static int ep0_txcomplete(struct qe_ep *ep, unsigned char restart)
1298 {
1299 struct qe_req *tx_req = NULL;
1300 struct qe_frame *frame = ep->txframe;
1301
1302 if ((frame_get_info(frame) & (ZLP | NO_REQ)) == (ZLP | NO_REQ)) {
1303 if (!restart)
1304 ep->udc->ep0_state = WAIT_FOR_SETUP;
1305 else
1306 sendnulldata(ep, ep->txframe, SETUP_STATUS | NO_REQ);
1307 return 0;
1308 }
1309
1310 tx_req = ep->tx_req;
1311 if (tx_req != NULL) {
1312 if (!restart) {
1313 int asent = ep->last;
1314 ep->sent += asent;
1315 ep->last -= asent;
1316 } else {
1317 ep->last = 0;
1318 }
1319
1320 /* a request already were transmitted completely */
1321 if ((ep->tx_req->req.length - ep->sent) <= 0) {
1322 ep->tx_req->req.actual = (unsigned int)ep->sent;
1323 ep0_req_complete(ep->udc, ep->tx_req);
1324 ep->tx_req = NULL;
1325 ep->last = 0;
1326 ep->sent = 0;
1327 }
1328 } else {
1329 dev_vdbg(ep->udc->dev, "the ep0_controller have no req\n");
1330 }
1331
1332 return 0;
1333 }
1334
1335 static int ep0_txframe_handle(struct qe_ep *ep)
1336 {
1337 /* if have error, transmit again */
1338 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1339 qe_ep_flushtxfifo(ep);
1340 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1341 if (frame_get_info(ep->txframe) & PID_DATA0)
1342 ep->data01 = 0;
1343 else
1344 ep->data01 = 1;
1345
1346 ep0_txcomplete(ep, 1);
1347 } else
1348 ep0_txcomplete(ep, 0);
1349
1350 frame_create_tx(ep, ep->txframe);
1351 return 0;
1352 }
1353
1354 static int qe_ep0_txconf(struct qe_ep *ep)
1355 {
1356 struct qe_bd __iomem *bd;
1357 struct qe_frame *pframe;
1358 u32 bdstatus;
1359
1360 bd = ep->c_txbd;
1361 bdstatus = in_be32((u32 __iomem *)bd);
1362 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1363 pframe = ep->txframe;
1364
1365 /* clear and recycle the BD */
1366 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1367 out_be32(&bd->buf, 0);
1368 if (bdstatus & T_W)
1369 ep->c_txbd = ep->txbase;
1370 else
1371 ep->c_txbd++;
1372
1373 if (ep->c_txbd == ep->n_txbd) {
1374 if (bdstatus & DEVICE_T_ERROR) {
1375 frame_set_status(pframe, FRAME_ERROR);
1376 if (bdstatus & T_TO)
1377 pframe->status |= TX_ER_TIMEOUT;
1378 if (bdstatus & T_UN)
1379 pframe->status |= TX_ER_UNDERUN;
1380 }
1381 ep0_txframe_handle(ep);
1382 }
1383
1384 bd = ep->c_txbd;
1385 bdstatus = in_be32((u32 __iomem *)bd);
1386 }
1387
1388 return 0;
1389 }
1390
1391 static int ep_txframe_handle(struct qe_ep *ep)
1392 {
1393 if (frame_get_status(ep->txframe) & FRAME_ERROR) {
1394 qe_ep_flushtxfifo(ep);
1395 dev_vdbg(ep->udc->dev, "The EP0 transmit data have error!\n");
1396 if (frame_get_info(ep->txframe) & PID_DATA0)
1397 ep->data01 = 0;
1398 else
1399 ep->data01 = 1;
1400
1401 txcomplete(ep, 1);
1402 } else
1403 txcomplete(ep, 0);
1404
1405 frame_create_tx(ep, ep->txframe); /* send the data */
1406 return 0;
1407 }
1408
1409 /* confirm the already trainsmited bd */
1410 static int qe_ep_txconf(struct qe_ep *ep)
1411 {
1412 struct qe_bd __iomem *bd;
1413 struct qe_frame *pframe = NULL;
1414 u32 bdstatus;
1415 unsigned char breakonrxinterrupt = 0;
1416
1417 bd = ep->c_txbd;
1418 bdstatus = in_be32((u32 __iomem *)bd);
1419 while (!(bdstatus & T_R) && (bdstatus & ~T_W)) {
1420 pframe = ep->txframe;
1421 if (bdstatus & DEVICE_T_ERROR) {
1422 frame_set_status(pframe, FRAME_ERROR);
1423 if (bdstatus & T_TO)
1424 pframe->status |= TX_ER_TIMEOUT;
1425 if (bdstatus & T_UN)
1426 pframe->status |= TX_ER_UNDERUN;
1427 }
1428
1429 /* clear and recycle the BD */
1430 out_be32((u32 __iomem *)bd, bdstatus & T_W);
1431 out_be32(&bd->buf, 0);
1432 if (bdstatus & T_W)
1433 ep->c_txbd = ep->txbase;
1434 else
1435 ep->c_txbd++;
1436
1437 /* handle the tx frame */
1438 ep_txframe_handle(ep);
1439 bd = ep->c_txbd;
1440 bdstatus = in_be32((u32 __iomem *)bd);
1441 }
1442 if (breakonrxinterrupt)
1443 return -EIO;
1444 else
1445 return 0;
1446 }
1447
1448 /* Add a request in queue, and try to transmit a packet */
1449 static int ep_req_send(struct qe_ep *ep, struct qe_req *req)
1450 {
1451 int reval = 0;
1452
1453 if (ep->tx_req == NULL) {
1454 ep->sent = 0;
1455 ep->last = 0;
1456 txcomplete(ep, 0); /* can gain a new tx_req */
1457 reval = frame_create_tx(ep, ep->txframe);
1458 }
1459 return reval;
1460 }
1461
1462 /* Maybe this is a good ideal */
1463 static int ep_req_rx(struct qe_ep *ep, struct qe_req *req)
1464 {
1465 struct qe_udc *udc = ep->udc;
1466 struct qe_frame *pframe = NULL;
1467 struct qe_bd __iomem *bd;
1468 u32 bdstatus, length;
1469 u32 vaddr, fsize;
1470 u8 *cp;
1471 u8 finish_req = 0;
1472 u8 framepid;
1473
1474 if (list_empty(&ep->queue)) {
1475 dev_vdbg(udc->dev, "the req already finish!\n");
1476 return 0;
1477 }
1478 pframe = ep->rxframe;
1479
1480 bd = ep->n_rxbd;
1481 bdstatus = in_be32((u32 __iomem *)bd);
1482 length = bdstatus & BD_LENGTH_MASK;
1483
1484 while (!(bdstatus & R_E) && length) {
1485 if (finish_req)
1486 break;
1487 if ((bdstatus & R_F) && (bdstatus & R_L)
1488 && !(bdstatus & R_ERROR)) {
1489 qe_frame_clean(pframe);
1490 vaddr = (u32)phys_to_virt(in_be32(&bd->buf));
1491 frame_set_data(pframe, (u8 *)vaddr);
1492 frame_set_length(pframe, (length - USB_CRC_SIZE));
1493 frame_set_status(pframe, FRAME_OK);
1494 switch (bdstatus & R_PID) {
1495 case R_PID_DATA1:
1496 frame_set_info(pframe, PID_DATA1); break;
1497 default:
1498 frame_set_info(pframe, PID_DATA0); break;
1499 }
1500 /* handle the rx frame */
1501
1502 if (frame_get_info(pframe) & PID_DATA1)
1503 framepid = 0x1;
1504 else
1505 framepid = 0;
1506
1507 if (framepid != ep->data01) {
1508 dev_vdbg(udc->dev, "the data01 error!\n");
1509 } else {
1510 fsize = frame_get_length(pframe);
1511
1512 cp = (u8 *)(req->req.buf) + req->req.actual;
1513 if (cp) {
1514 memcpy(cp, pframe->data, fsize);
1515 req->req.actual += fsize;
1516 if ((fsize < ep->ep.maxpacket)
1517 || (req->req.actual >=
1518 req->req.length)) {
1519 finish_req = 1;
1520 done(ep, req, 0);
1521 if (list_empty(&ep->queue))
1522 qe_eprx_nack(ep);
1523 }
1524 }
1525 qe_ep_toggledata01(ep);
1526 }
1527 } else {
1528 dev_err(udc->dev, "The receive frame with error!\n");
1529 }
1530
1531 /* note: don't clear the rxbd's buffer address *
1532 * only Clear the length */
1533 out_be32((u32 __iomem *)bd, (bdstatus & BD_STATUS_MASK));
1534 ep->has_data--;
1535
1536 /* Get next BD */
1537 if (bdstatus & R_W)
1538 bd = ep->rxbase;
1539 else
1540 bd++;
1541
1542 bdstatus = in_be32((u32 __iomem *)bd);
1543 length = bdstatus & BD_LENGTH_MASK;
1544 }
1545
1546 ep->n_rxbd = bd;
1547 ep_recycle_rxbds(ep);
1548
1549 return 0;
1550 }
1551
1552 /* only add the request in queue */
1553 static int ep_req_receive(struct qe_ep *ep, struct qe_req *req)
1554 {
1555 if (ep->state == EP_STATE_NACK) {
1556 if (ep->has_data <= 0) {
1557 /* Enable rx and unmask rx interrupt */
1558 qe_eprx_normal(ep);
1559 } else {
1560 /* Copy the exist BD data */
1561 ep_req_rx(ep, req);
1562 }
1563 }
1564
1565 return 0;
1566 }
1567
1568 /********************************************************************
1569 Internal Used Function End
1570 ********************************************************************/
1571
1572 /*-----------------------------------------------------------------------
1573 Endpoint Management Functions For Gadget
1574 -----------------------------------------------------------------------*/
1575 static int qe_ep_enable(struct usb_ep *_ep,
1576 const struct usb_endpoint_descriptor *desc)
1577 {
1578 struct qe_udc *udc;
1579 struct qe_ep *ep;
1580 int retval = 0;
1581 unsigned char epnum;
1582
1583 ep = container_of(_ep, struct qe_ep, ep);
1584
1585 /* catch various bogus parameters */
1586 if (!_ep || !desc || _ep->name == ep_name[0] ||
1587 (desc->bDescriptorType != USB_DT_ENDPOINT))
1588 return -EINVAL;
1589
1590 udc = ep->udc;
1591 if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
1592 return -ESHUTDOWN;
1593
1594 epnum = (u8)desc->bEndpointAddress & 0xF;
1595
1596 retval = qe_ep_init(udc, epnum, desc);
1597 if (retval != 0) {
1598 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1599 dev_dbg(udc->dev, "enable ep%d failed\n", ep->epnum);
1600 return -EINVAL;
1601 }
1602 dev_dbg(udc->dev, "enable ep%d successful\n", ep->epnum);
1603 return 0;
1604 }
1605
1606 static int qe_ep_disable(struct usb_ep *_ep)
1607 {
1608 struct qe_udc *udc;
1609 struct qe_ep *ep;
1610 unsigned long flags;
1611 unsigned int size;
1612
1613 ep = container_of(_ep, struct qe_ep, ep);
1614 udc = ep->udc;
1615
1616 if (!_ep || !ep->ep.desc) {
1617 dev_dbg(udc->dev, "%s not enabled\n", _ep ? ep->ep.name : NULL);
1618 return -EINVAL;
1619 }
1620
1621 spin_lock_irqsave(&udc->lock, flags);
1622 /* Nuke all pending requests (does flush) */
1623 nuke(ep, -ESHUTDOWN);
1624 ep->ep.desc = NULL;
1625 ep->stopped = 1;
1626 ep->tx_req = NULL;
1627 qe_ep_reset(udc, ep->epnum);
1628 spin_unlock_irqrestore(&udc->lock, flags);
1629
1630 cpm_muram_free(cpm_muram_offset(ep->rxbase));
1631
1632 if (ep->dir == USB_DIR_OUT)
1633 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1634 (USB_BDRING_LEN_RX + 1);
1635 else
1636 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) *
1637 (USB_BDRING_LEN + 1);
1638
1639 if (ep->dir != USB_DIR_IN) {
1640 kfree(ep->rxframe);
1641 if (ep->rxbufmap) {
1642 dma_unmap_single(udc->gadget.dev.parent,
1643 ep->rxbuf_d, size,
1644 DMA_FROM_DEVICE);
1645 ep->rxbuf_d = DMA_ADDR_INVALID;
1646 } else {
1647 dma_sync_single_for_cpu(
1648 udc->gadget.dev.parent,
1649 ep->rxbuf_d, size,
1650 DMA_FROM_DEVICE);
1651 }
1652 kfree(ep->rxbuffer);
1653 }
1654
1655 if (ep->dir != USB_DIR_OUT)
1656 kfree(ep->txframe);
1657
1658 dev_dbg(udc->dev, "disabled %s OK\n", _ep->name);
1659 return 0;
1660 }
1661
1662 static struct usb_request *qe_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
1663 {
1664 struct qe_req *req;
1665
1666 req = kzalloc(sizeof(*req), gfp_flags);
1667 if (!req)
1668 return NULL;
1669
1670 req->req.dma = DMA_ADDR_INVALID;
1671
1672 INIT_LIST_HEAD(&req->queue);
1673
1674 return &req->req;
1675 }
1676
1677 static void qe_free_request(struct usb_ep *_ep, struct usb_request *_req)
1678 {
1679 struct qe_req *req;
1680
1681 req = container_of(_req, struct qe_req, req);
1682
1683 if (_req)
1684 kfree(req);
1685 }
1686
1687 static int __qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req)
1688 {
1689 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1690 struct qe_req *req = container_of(_req, struct qe_req, req);
1691 struct qe_udc *udc;
1692 int reval;
1693
1694 udc = ep->udc;
1695 /* catch various bogus parameters */
1696 if (!_req || !req->req.complete || !req->req.buf
1697 || !list_empty(&req->queue)) {
1698 dev_dbg(udc->dev, "bad params\n");
1699 return -EINVAL;
1700 }
1701 if (!_ep || (!ep->ep.desc && ep_index(ep))) {
1702 dev_dbg(udc->dev, "bad ep\n");
1703 return -EINVAL;
1704 }
1705
1706 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
1707 return -ESHUTDOWN;
1708
1709 req->ep = ep;
1710
1711 /* map virtual address to hardware */
1712 if (req->req.dma == DMA_ADDR_INVALID) {
1713 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1714 req->req.buf,
1715 req->req.length,
1716 ep_is_in(ep)
1717 ? DMA_TO_DEVICE :
1718 DMA_FROM_DEVICE);
1719 req->mapped = 1;
1720 } else {
1721 dma_sync_single_for_device(ep->udc->gadget.dev.parent,
1722 req->req.dma, req->req.length,
1723 ep_is_in(ep)
1724 ? DMA_TO_DEVICE :
1725 DMA_FROM_DEVICE);
1726 req->mapped = 0;
1727 }
1728
1729 req->req.status = -EINPROGRESS;
1730 req->req.actual = 0;
1731
1732 list_add_tail(&req->queue, &ep->queue);
1733 dev_vdbg(udc->dev, "gadget have request in %s! %d\n",
1734 ep->name, req->req.length);
1735
1736 /* push the request to device */
1737 if (ep_is_in(ep))
1738 reval = ep_req_send(ep, req);
1739
1740 /* EP0 */
1741 if (ep_index(ep) == 0 && req->req.length > 0) {
1742 if (ep_is_in(ep))
1743 udc->ep0_state = DATA_STATE_XMIT;
1744 else
1745 udc->ep0_state = DATA_STATE_RECV;
1746 }
1747
1748 if (ep->dir == USB_DIR_OUT)
1749 reval = ep_req_receive(ep, req);
1750
1751 return 0;
1752 }
1753
1754 /* queues (submits) an I/O request to an endpoint */
1755 static int qe_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1756 gfp_t gfp_flags)
1757 {
1758 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1759 struct qe_udc *udc = ep->udc;
1760 unsigned long flags;
1761 int ret;
1762
1763 spin_lock_irqsave(&udc->lock, flags);
1764 ret = __qe_ep_queue(_ep, _req);
1765 spin_unlock_irqrestore(&udc->lock, flags);
1766 return ret;
1767 }
1768
1769 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
1770 static int qe_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1771 {
1772 struct qe_ep *ep = container_of(_ep, struct qe_ep, ep);
1773 struct qe_req *req;
1774 unsigned long flags;
1775
1776 if (!_ep || !_req)
1777 return -EINVAL;
1778
1779 spin_lock_irqsave(&ep->udc->lock, flags);
1780
1781 /* make sure it's actually queued on this endpoint */
1782 list_for_each_entry(req, &ep->queue, queue) {
1783 if (&req->req == _req)
1784 break;
1785 }
1786
1787 if (&req->req != _req) {
1788 spin_unlock_irqrestore(&ep->udc->lock, flags);
1789 return -EINVAL;
1790 }
1791
1792 done(ep, req, -ECONNRESET);
1793
1794 spin_unlock_irqrestore(&ep->udc->lock, flags);
1795 return 0;
1796 }
1797
1798 /*-----------------------------------------------------------------
1799 * modify the endpoint halt feature
1800 * @ep: the non-isochronous endpoint being stalled
1801 * @value: 1--set halt 0--clear halt
1802 * Returns zero, or a negative error code.
1803 *----------------------------------------------------------------*/
1804 static int qe_ep_set_halt(struct usb_ep *_ep, int value)
1805 {
1806 struct qe_ep *ep;
1807 unsigned long flags;
1808 int status = -EOPNOTSUPP;
1809 struct qe_udc *udc;
1810
1811 ep = container_of(_ep, struct qe_ep, ep);
1812 if (!_ep || !ep->ep.desc) {
1813 status = -EINVAL;
1814 goto out;
1815 }
1816
1817 udc = ep->udc;
1818 /* Attempt to halt IN ep will fail if any transfer requests
1819 * are still queue */
1820 if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
1821 status = -EAGAIN;
1822 goto out;
1823 }
1824
1825 status = 0;
1826 spin_lock_irqsave(&ep->udc->lock, flags);
1827 qe_eptx_stall_change(ep, value);
1828 qe_eprx_stall_change(ep, value);
1829 spin_unlock_irqrestore(&ep->udc->lock, flags);
1830
1831 if (ep->epnum == 0) {
1832 udc->ep0_state = WAIT_FOR_SETUP;
1833 udc->ep0_dir = 0;
1834 }
1835
1836 /* set data toggle to DATA0 on clear halt */
1837 if (value == 0)
1838 ep->data01 = 0;
1839 out:
1840 dev_vdbg(udc->dev, "%s %s halt stat %d\n", ep->ep.name,
1841 value ? "set" : "clear", status);
1842
1843 return status;
1844 }
1845
1846 static const struct usb_ep_ops qe_ep_ops = {
1847 .enable = qe_ep_enable,
1848 .disable = qe_ep_disable,
1849
1850 .alloc_request = qe_alloc_request,
1851 .free_request = qe_free_request,
1852
1853 .queue = qe_ep_queue,
1854 .dequeue = qe_ep_dequeue,
1855
1856 .set_halt = qe_ep_set_halt,
1857 };
1858
1859 /*------------------------------------------------------------------------
1860 Gadget Driver Layer Operations
1861 ------------------------------------------------------------------------*/
1862
1863 /* Get the current frame number */
1864 static int qe_get_frame(struct usb_gadget *gadget)
1865 {
1866 struct qe_udc *udc = container_of(gadget, struct qe_udc, gadget);
1867 u16 tmp;
1868
1869 tmp = in_be16(&udc->usb_param->frame_n);
1870 if (tmp & 0x8000)
1871 return tmp & 0x07ff;
1872 return -EINVAL;
1873 }
1874
1875 static int fsl_qe_start(struct usb_gadget *gadget,
1876 struct usb_gadget_driver *driver);
1877 static int fsl_qe_stop(struct usb_gadget *gadget);
1878
1879 /* defined in usb_gadget.h */
1880 static const struct usb_gadget_ops qe_gadget_ops = {
1881 .get_frame = qe_get_frame,
1882 .udc_start = fsl_qe_start,
1883 .udc_stop = fsl_qe_stop,
1884 };
1885
1886 /*-------------------------------------------------------------------------
1887 USB ep0 Setup process in BUS Enumeration
1888 -------------------------------------------------------------------------*/
1889 static int udc_reset_ep_queue(struct qe_udc *udc, u8 pipe)
1890 {
1891 struct qe_ep *ep = &udc->eps[pipe];
1892
1893 nuke(ep, -ECONNRESET);
1894 ep->tx_req = NULL;
1895 return 0;
1896 }
1897
1898 static int reset_queues(struct qe_udc *udc)
1899 {
1900 u8 pipe;
1901
1902 for (pipe = 0; pipe < USB_MAX_ENDPOINTS; pipe++)
1903 udc_reset_ep_queue(udc, pipe);
1904
1905 /* report disconnect; the driver is already quiesced */
1906 spin_unlock(&udc->lock);
1907 usb_gadget_udc_reset(&udc->gadget, udc->driver);
1908 spin_lock(&udc->lock);
1909
1910 return 0;
1911 }
1912
1913 static void ch9setaddress(struct qe_udc *udc, u16 value, u16 index,
1914 u16 length)
1915 {
1916 /* Save the new address to device struct */
1917 udc->device_address = (u8) value;
1918 /* Update usb state */
1919 udc->usb_state = USB_STATE_ADDRESS;
1920
1921 /* Status phase , send a ZLP */
1922 if (ep0_prime_status(udc, USB_DIR_IN))
1923 qe_ep0_stall(udc);
1924 }
1925
1926 static void ownercomplete(struct usb_ep *_ep, struct usb_request *_req)
1927 {
1928 struct qe_req *req = container_of(_req, struct qe_req, req);
1929
1930 req->req.buf = NULL;
1931 kfree(req);
1932 }
1933
1934 static void ch9getstatus(struct qe_udc *udc, u8 request_type, u16 value,
1935 u16 index, u16 length)
1936 {
1937 u16 usb_status = 0;
1938 struct qe_req *req;
1939 struct qe_ep *ep;
1940 int status = 0;
1941
1942 ep = &udc->eps[0];
1943 if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1944 /* Get device status */
1945 usb_status = 1 << USB_DEVICE_SELF_POWERED;
1946 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
1947 /* Get interface status */
1948 /* We don't have interface information in udc driver */
1949 usb_status = 0;
1950 } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
1951 /* Get endpoint status */
1952 int pipe = index & USB_ENDPOINT_NUMBER_MASK;
1953 struct qe_ep *target_ep = &udc->eps[pipe];
1954 u16 usep;
1955
1956 /* stall if endpoint doesn't exist */
1957 if (!target_ep->ep.desc)
1958 goto stall;
1959
1960 usep = in_be16(&udc->usb_regs->usb_usep[pipe]);
1961 if (index & USB_DIR_IN) {
1962 if (target_ep->dir != USB_DIR_IN)
1963 goto stall;
1964 if ((usep & USB_THS_MASK) == USB_THS_STALL)
1965 usb_status = 1 << USB_ENDPOINT_HALT;
1966 } else {
1967 if (target_ep->dir != USB_DIR_OUT)
1968 goto stall;
1969 if ((usep & USB_RHS_MASK) == USB_RHS_STALL)
1970 usb_status = 1 << USB_ENDPOINT_HALT;
1971 }
1972 }
1973
1974 req = container_of(qe_alloc_request(&ep->ep, GFP_KERNEL),
1975 struct qe_req, req);
1976 req->req.length = 2;
1977 req->req.buf = udc->statusbuf;
1978 *(u16 *)req->req.buf = cpu_to_le16(usb_status);
1979 req->req.status = -EINPROGRESS;
1980 req->req.actual = 0;
1981 req->req.complete = ownercomplete;
1982
1983 udc->ep0_dir = USB_DIR_IN;
1984
1985 /* data phase */
1986 status = __qe_ep_queue(&ep->ep, &req->req);
1987
1988 if (status == 0)
1989 return;
1990 stall:
1991 dev_err(udc->dev, "Can't respond to getstatus request \n");
1992 qe_ep0_stall(udc);
1993 }
1994
1995 /* only handle the setup request, suppose the device in normal status */
1996 static void setup_received_handle(struct qe_udc *udc,
1997 struct usb_ctrlrequest *setup)
1998 {
1999 /* Fix Endian (udc->local_setup_buff is cpu Endian now)*/
2000 u16 wValue = le16_to_cpu(setup->wValue);
2001 u16 wIndex = le16_to_cpu(setup->wIndex);
2002 u16 wLength = le16_to_cpu(setup->wLength);
2003
2004 /* clear the previous request in the ep0 */
2005 udc_reset_ep_queue(udc, 0);
2006
2007 if (setup->bRequestType & USB_DIR_IN)
2008 udc->ep0_dir = USB_DIR_IN;
2009 else
2010 udc->ep0_dir = USB_DIR_OUT;
2011
2012 switch (setup->bRequest) {
2013 case USB_REQ_GET_STATUS:
2014 /* Data+Status phase form udc */
2015 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
2016 != (USB_DIR_IN | USB_TYPE_STANDARD))
2017 break;
2018 ch9getstatus(udc, setup->bRequestType, wValue, wIndex,
2019 wLength);
2020 return;
2021
2022 case USB_REQ_SET_ADDRESS:
2023 /* Status phase from udc */
2024 if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
2025 USB_RECIP_DEVICE))
2026 break;
2027 ch9setaddress(udc, wValue, wIndex, wLength);
2028 return;
2029
2030 case USB_REQ_CLEAR_FEATURE:
2031 case USB_REQ_SET_FEATURE:
2032 /* Requests with no data phase, status phase from udc */
2033 if ((setup->bRequestType & USB_TYPE_MASK)
2034 != USB_TYPE_STANDARD)
2035 break;
2036
2037 if ((setup->bRequestType & USB_RECIP_MASK)
2038 == USB_RECIP_ENDPOINT) {
2039 int pipe = wIndex & USB_ENDPOINT_NUMBER_MASK;
2040 struct qe_ep *ep;
2041
2042 if (wValue != 0 || wLength != 0
2043 || pipe >= USB_MAX_ENDPOINTS)
2044 break;
2045 ep = &udc->eps[pipe];
2046
2047 spin_unlock(&udc->lock);
2048 qe_ep_set_halt(&ep->ep,
2049 (setup->bRequest == USB_REQ_SET_FEATURE)
2050 ? 1 : 0);
2051 spin_lock(&udc->lock);
2052 }
2053
2054 ep0_prime_status(udc, USB_DIR_IN);
2055
2056 return;
2057
2058 default:
2059 break;
2060 }
2061
2062 if (wLength) {
2063 /* Data phase from gadget, status phase from udc */
2064 if (setup->bRequestType & USB_DIR_IN) {
2065 udc->ep0_state = DATA_STATE_XMIT;
2066 udc->ep0_dir = USB_DIR_IN;
2067 } else {
2068 udc->ep0_state = DATA_STATE_RECV;
2069 udc->ep0_dir = USB_DIR_OUT;
2070 }
2071 spin_unlock(&udc->lock);
2072 if (udc->driver->setup(&udc->gadget,
2073 &udc->local_setup_buff) < 0)
2074 qe_ep0_stall(udc);
2075 spin_lock(&udc->lock);
2076 } else {
2077 /* No data phase, IN status from gadget */
2078 udc->ep0_dir = USB_DIR_IN;
2079 spin_unlock(&udc->lock);
2080 if (udc->driver->setup(&udc->gadget,
2081 &udc->local_setup_buff) < 0)
2082 qe_ep0_stall(udc);
2083 spin_lock(&udc->lock);
2084 udc->ep0_state = DATA_STATE_NEED_ZLP;
2085 }
2086 }
2087
2088 /*-------------------------------------------------------------------------
2089 USB Interrupt handlers
2090 -------------------------------------------------------------------------*/
2091 static void suspend_irq(struct qe_udc *udc)
2092 {
2093 udc->resume_state = udc->usb_state;
2094 udc->usb_state = USB_STATE_SUSPENDED;
2095
2096 /* report suspend to the driver ,serial.c not support this*/
2097 if (udc->driver->suspend)
2098 udc->driver->suspend(&udc->gadget);
2099 }
2100
2101 static void resume_irq(struct qe_udc *udc)
2102 {
2103 udc->usb_state = udc->resume_state;
2104 udc->resume_state = 0;
2105
2106 /* report resume to the driver , serial.c not support this*/
2107 if (udc->driver->resume)
2108 udc->driver->resume(&udc->gadget);
2109 }
2110
2111 static void idle_irq(struct qe_udc *udc)
2112 {
2113 u8 usbs;
2114
2115 usbs = in_8(&udc->usb_regs->usb_usbs);
2116 if (usbs & USB_IDLE_STATUS_MASK) {
2117 if ((udc->usb_state) != USB_STATE_SUSPENDED)
2118 suspend_irq(udc);
2119 } else {
2120 if (udc->usb_state == USB_STATE_SUSPENDED)
2121 resume_irq(udc);
2122 }
2123 }
2124
2125 static int reset_irq(struct qe_udc *udc)
2126 {
2127 unsigned char i;
2128
2129 if (udc->usb_state == USB_STATE_DEFAULT)
2130 return 0;
2131
2132 qe_usb_disable(udc);
2133 out_8(&udc->usb_regs->usb_usadr, 0);
2134
2135 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2136 if (udc->eps[i].init)
2137 qe_ep_reset(udc, i);
2138 }
2139
2140 reset_queues(udc);
2141 udc->usb_state = USB_STATE_DEFAULT;
2142 udc->ep0_state = WAIT_FOR_SETUP;
2143 udc->ep0_dir = USB_DIR_OUT;
2144 qe_usb_enable(udc);
2145 return 0;
2146 }
2147
2148 static int bsy_irq(struct qe_udc *udc)
2149 {
2150 return 0;
2151 }
2152
2153 static int txe_irq(struct qe_udc *udc)
2154 {
2155 return 0;
2156 }
2157
2158 /* ep0 tx interrupt also in here */
2159 static int tx_irq(struct qe_udc *udc)
2160 {
2161 struct qe_ep *ep;
2162 struct qe_bd __iomem *bd;
2163 int i, res = 0;
2164
2165 if ((udc->usb_state == USB_STATE_ADDRESS)
2166 && (in_8(&udc->usb_regs->usb_usadr) == 0))
2167 out_8(&udc->usb_regs->usb_usadr, udc->device_address);
2168
2169 for (i = (USB_MAX_ENDPOINTS-1); ((i >= 0) && (res == 0)); i--) {
2170 ep = &udc->eps[i];
2171 if (ep && ep->init && (ep->dir != USB_DIR_OUT)) {
2172 bd = ep->c_txbd;
2173 if (!(in_be32((u32 __iomem *)bd) & T_R)
2174 && (in_be32(&bd->buf))) {
2175 /* confirm the transmitted bd */
2176 if (ep->epnum == 0)
2177 res = qe_ep0_txconf(ep);
2178 else
2179 res = qe_ep_txconf(ep);
2180 }
2181 }
2182 }
2183 return res;
2184 }
2185
2186
2187 /* setup packect's rx is handle in the function too */
2188 static void rx_irq(struct qe_udc *udc)
2189 {
2190 struct qe_ep *ep;
2191 struct qe_bd __iomem *bd;
2192 int i;
2193
2194 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2195 ep = &udc->eps[i];
2196 if (ep && ep->init && (ep->dir != USB_DIR_IN)) {
2197 bd = ep->n_rxbd;
2198 if (!(in_be32((u32 __iomem *)bd) & R_E)
2199 && (in_be32(&bd->buf))) {
2200 if (ep->epnum == 0) {
2201 qe_ep0_rx(udc);
2202 } else {
2203 /*non-setup package receive*/
2204 qe_ep_rx(ep);
2205 }
2206 }
2207 }
2208 }
2209 }
2210
2211 static irqreturn_t qe_udc_irq(int irq, void *_udc)
2212 {
2213 struct qe_udc *udc = (struct qe_udc *)_udc;
2214 u16 irq_src;
2215 irqreturn_t status = IRQ_NONE;
2216 unsigned long flags;
2217
2218 spin_lock_irqsave(&udc->lock, flags);
2219
2220 irq_src = in_be16(&udc->usb_regs->usb_usber) &
2221 in_be16(&udc->usb_regs->usb_usbmr);
2222 /* Clear notification bits */
2223 out_be16(&udc->usb_regs->usb_usber, irq_src);
2224 /* USB Interrupt */
2225 if (irq_src & USB_E_IDLE_MASK) {
2226 idle_irq(udc);
2227 irq_src &= ~USB_E_IDLE_MASK;
2228 status = IRQ_HANDLED;
2229 }
2230
2231 if (irq_src & USB_E_TXB_MASK) {
2232 tx_irq(udc);
2233 irq_src &= ~USB_E_TXB_MASK;
2234 status = IRQ_HANDLED;
2235 }
2236
2237 if (irq_src & USB_E_RXB_MASK) {
2238 rx_irq(udc);
2239 irq_src &= ~USB_E_RXB_MASK;
2240 status = IRQ_HANDLED;
2241 }
2242
2243 if (irq_src & USB_E_RESET_MASK) {
2244 reset_irq(udc);
2245 irq_src &= ~USB_E_RESET_MASK;
2246 status = IRQ_HANDLED;
2247 }
2248
2249 if (irq_src & USB_E_BSY_MASK) {
2250 bsy_irq(udc);
2251 irq_src &= ~USB_E_BSY_MASK;
2252 status = IRQ_HANDLED;
2253 }
2254
2255 if (irq_src & USB_E_TXE_MASK) {
2256 txe_irq(udc);
2257 irq_src &= ~USB_E_TXE_MASK;
2258 status = IRQ_HANDLED;
2259 }
2260
2261 spin_unlock_irqrestore(&udc->lock, flags);
2262
2263 return status;
2264 }
2265
2266 /*-------------------------------------------------------------------------
2267 Gadget driver probe and unregister.
2268 --------------------------------------------------------------------------*/
2269 static int fsl_qe_start(struct usb_gadget *gadget,
2270 struct usb_gadget_driver *driver)
2271 {
2272 struct qe_udc *udc;
2273 unsigned long flags;
2274
2275 udc = container_of(gadget, struct qe_udc, gadget);
2276 /* lock is needed but whether should use this lock or another */
2277 spin_lock_irqsave(&udc->lock, flags);
2278
2279 driver->driver.bus = NULL;
2280 /* hook up the driver */
2281 udc->driver = driver;
2282 udc->gadget.speed = driver->max_speed;
2283
2284 /* Enable IRQ reg and Set usbcmd reg EN bit */
2285 qe_usb_enable(udc);
2286
2287 out_be16(&udc->usb_regs->usb_usber, 0xffff);
2288 out_be16(&udc->usb_regs->usb_usbmr, USB_E_DEFAULT_DEVICE);
2289 udc->usb_state = USB_STATE_ATTACHED;
2290 udc->ep0_state = WAIT_FOR_SETUP;
2291 udc->ep0_dir = USB_DIR_OUT;
2292 spin_unlock_irqrestore(&udc->lock, flags);
2293
2294 return 0;
2295 }
2296
2297 static int fsl_qe_stop(struct usb_gadget *gadget)
2298 {
2299 struct qe_udc *udc;
2300 struct qe_ep *loop_ep;
2301 unsigned long flags;
2302
2303 udc = container_of(gadget, struct qe_udc, gadget);
2304 /* stop usb controller, disable intr */
2305 qe_usb_disable(udc);
2306
2307 /* in fact, no needed */
2308 udc->usb_state = USB_STATE_ATTACHED;
2309 udc->ep0_state = WAIT_FOR_SETUP;
2310 udc->ep0_dir = 0;
2311
2312 /* stand operation */
2313 spin_lock_irqsave(&udc->lock, flags);
2314 udc->gadget.speed = USB_SPEED_UNKNOWN;
2315 nuke(&udc->eps[0], -ESHUTDOWN);
2316 list_for_each_entry(loop_ep, &udc->gadget.ep_list, ep.ep_list)
2317 nuke(loop_ep, -ESHUTDOWN);
2318 spin_unlock_irqrestore(&udc->lock, flags);
2319
2320 udc->driver = NULL;
2321
2322 return 0;
2323 }
2324
2325 /* udc structure's alloc and setup, include ep-param alloc */
2326 static struct qe_udc *qe_udc_config(struct platform_device *ofdev)
2327 {
2328 struct qe_udc *udc;
2329 struct device_node *np = ofdev->dev.of_node;
2330 unsigned long tmp_addr = 0;
2331 struct usb_device_para __iomem *usbpram;
2332 unsigned int i;
2333 u64 size;
2334 u32 offset;
2335
2336 udc = kzalloc(sizeof(*udc), GFP_KERNEL);
2337 if (!udc)
2338 goto cleanup;
2339
2340 udc->dev = &ofdev->dev;
2341
2342 /* get default address of usb parameter in MURAM from device tree */
2343 offset = *of_get_address(np, 1, &size, NULL);
2344 udc->usb_param = cpm_muram_addr(offset);
2345 memset_io(udc->usb_param, 0, size);
2346
2347 usbpram = udc->usb_param;
2348 out_be16(&usbpram->frame_n, 0);
2349 out_be32(&usbpram->rstate, 0);
2350
2351 tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
2352 sizeof(struct usb_ep_para)),
2353 USB_EP_PARA_ALIGNMENT);
2354 if (IS_ERR_VALUE(tmp_addr))
2355 goto cleanup;
2356
2357 for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
2358 out_be16(&usbpram->epptr[i], (u16)tmp_addr);
2359 udc->ep_param[i] = cpm_muram_addr(tmp_addr);
2360 tmp_addr += 32;
2361 }
2362
2363 memset_io(udc->ep_param[0], 0,
2364 USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para));
2365
2366 udc->resume_state = USB_STATE_NOTATTACHED;
2367 udc->usb_state = USB_STATE_POWERED;
2368 udc->ep0_dir = 0;
2369
2370 spin_lock_init(&udc->lock);
2371 return udc;
2372
2373 cleanup:
2374 kfree(udc);
2375 return NULL;
2376 }
2377
2378 /* USB Controller register init */
2379 static int qe_udc_reg_init(struct qe_udc *udc)
2380 {
2381 struct usb_ctlr __iomem *qe_usbregs;
2382 qe_usbregs = udc->usb_regs;
2383
2384 /* Spec says that we must enable the USB controller to change mode. */
2385 out_8(&qe_usbregs->usb_usmod, 0x01);
2386 /* Mode changed, now disable it, since muram isn't initialized yet. */
2387 out_8(&qe_usbregs->usb_usmod, 0x00);
2388
2389 /* Initialize the rest. */
2390 out_be16(&qe_usbregs->usb_usbmr, 0);
2391 out_8(&qe_usbregs->usb_uscom, 0);
2392 out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
2393
2394 return 0;
2395 }
2396
2397 static int qe_ep_config(struct qe_udc *udc, unsigned char pipe_num)
2398 {
2399 struct qe_ep *ep = &udc->eps[pipe_num];
2400
2401 ep->udc = udc;
2402 strcpy(ep->name, ep_name[pipe_num]);
2403 ep->ep.name = ep_name[pipe_num];
2404
2405 if (pipe_num == 0) {
2406 ep->ep.caps.type_control = true;
2407 } else {
2408 ep->ep.caps.type_iso = true;
2409 ep->ep.caps.type_bulk = true;
2410 ep->ep.caps.type_int = true;
2411 }
2412
2413 ep->ep.caps.dir_in = true;
2414 ep->ep.caps.dir_out = true;
2415
2416 ep->ep.ops = &qe_ep_ops;
2417 ep->stopped = 1;
2418 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
2419 ep->ep.desc = NULL;
2420 ep->dir = 0xff;
2421 ep->epnum = (u8)pipe_num;
2422 ep->sent = 0;
2423 ep->last = 0;
2424 ep->init = 0;
2425 ep->rxframe = NULL;
2426 ep->txframe = NULL;
2427 ep->tx_req = NULL;
2428 ep->state = EP_STATE_IDLE;
2429 ep->has_data = 0;
2430
2431 /* the queue lists any req for this ep */
2432 INIT_LIST_HEAD(&ep->queue);
2433
2434 /* gagdet.ep_list used for ep_autoconfig so no ep0*/
2435 if (pipe_num != 0)
2436 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
2437
2438 ep->gadget = &udc->gadget;
2439
2440 return 0;
2441 }
2442
2443 /*-----------------------------------------------------------------------
2444 * UDC device Driver operation functions *
2445 *----------------------------------------------------------------------*/
2446 static void qe_udc_release(struct device *dev)
2447 {
2448 struct qe_udc *udc = container_of(dev, struct qe_udc, gadget.dev);
2449 int i;
2450
2451 complete(udc->done);
2452 cpm_muram_free(cpm_muram_offset(udc->ep_param[0]));
2453 for (i = 0; i < USB_MAX_ENDPOINTS; i++)
2454 udc->ep_param[i] = NULL;
2455
2456 kfree(udc);
2457 }
2458
2459 /* Driver probe functions */
2460 static const struct of_device_id qe_udc_match[];
2461 static int qe_udc_probe(struct platform_device *ofdev)
2462 {
2463 struct qe_udc *udc;
2464 const struct of_device_id *match;
2465 struct device_node *np = ofdev->dev.of_node;
2466 struct qe_ep *ep;
2467 unsigned int ret = 0;
2468 unsigned int i;
2469 const void *prop;
2470
2471 match = of_match_device(qe_udc_match, &ofdev->dev);
2472 if (!match)
2473 return -EINVAL;
2474
2475 prop = of_get_property(np, "mode", NULL);
2476 if (!prop || strcmp(prop, "peripheral"))
2477 return -ENODEV;
2478
2479 /* Initialize the udc structure including QH member and other member */
2480 udc = qe_udc_config(ofdev);
2481 if (!udc) {
2482 dev_err(&ofdev->dev, "failed to initialize\n");
2483 return -ENOMEM;
2484 }
2485
2486 udc->soc_type = (unsigned long)match->data;
2487 udc->usb_regs = of_iomap(np, 0);
2488 if (!udc->usb_regs) {
2489 ret = -ENOMEM;
2490 goto err1;
2491 }
2492
2493 /* initialize usb hw reg except for regs for EP,
2494 * leave usbintr reg untouched*/
2495 qe_udc_reg_init(udc);
2496
2497 /* here comes the stand operations for probe
2498 * set the qe_udc->gadget.xxx */
2499 udc->gadget.ops = &qe_gadget_ops;
2500
2501 /* gadget.ep0 is a pointer */
2502 udc->gadget.ep0 = &udc->eps[0].ep;
2503
2504 INIT_LIST_HEAD(&udc->gadget.ep_list);
2505
2506 /* modify in register gadget process */
2507 udc->gadget.speed = USB_SPEED_UNKNOWN;
2508
2509 /* name: Identifies the controller hardware type. */
2510 udc->gadget.name = driver_name;
2511 udc->gadget.dev.parent = &ofdev->dev;
2512
2513 /* initialize qe_ep struct */
2514 for (i = 0; i < USB_MAX_ENDPOINTS ; i++) {
2515 /* because the ep type isn't decide here so
2516 * qe_ep_init() should be called in ep_enable() */
2517
2518 /* setup the qe_ep struct and link ep.ep.list
2519 * into gadget.ep_list */
2520 qe_ep_config(udc, (unsigned char)i);
2521 }
2522
2523 /* ep0 initialization in here */
2524 ret = qe_ep_init(udc, 0, &qe_ep0_desc);
2525 if (ret)
2526 goto err2;
2527
2528 /* create a buf for ZLP send, need to remain zeroed */
2529 udc->nullbuf = devm_kzalloc(&ofdev->dev, 256, GFP_KERNEL);
2530 if (udc->nullbuf == NULL) {
2531 ret = -ENOMEM;
2532 goto err3;
2533 }
2534
2535 /* buffer for data of get_status request */
2536 udc->statusbuf = devm_kzalloc(&ofdev->dev, 2, GFP_KERNEL);
2537 if (udc->statusbuf == NULL) {
2538 ret = -ENOMEM;
2539 goto err3;
2540 }
2541
2542 udc->nullp = virt_to_phys((void *)udc->nullbuf);
2543 if (udc->nullp == DMA_ADDR_INVALID) {
2544 udc->nullp = dma_map_single(
2545 udc->gadget.dev.parent,
2546 udc->nullbuf,
2547 256,
2548 DMA_TO_DEVICE);
2549 udc->nullmap = 1;
2550 } else {
2551 dma_sync_single_for_device(udc->gadget.dev.parent,
2552 udc->nullp, 256,
2553 DMA_TO_DEVICE);
2554 }
2555
2556 tasklet_init(&udc->rx_tasklet, ep_rx_tasklet,
2557 (unsigned long)udc);
2558 /* request irq and disable DR */
2559 udc->usb_irq = irq_of_parse_and_map(np, 0);
2560 if (!udc->usb_irq) {
2561 ret = -EINVAL;
2562 goto err_noirq;
2563 }
2564
2565 ret = request_irq(udc->usb_irq, qe_udc_irq, 0,
2566 driver_name, udc);
2567 if (ret) {
2568 dev_err(udc->dev, "cannot request irq %d err %d\n",
2569 udc->usb_irq, ret);
2570 goto err4;
2571 }
2572
2573 ret = usb_add_gadget_udc_release(&ofdev->dev, &udc->gadget,
2574 qe_udc_release);
2575 if (ret)
2576 goto err5;
2577
2578 platform_set_drvdata(ofdev, udc);
2579 dev_info(udc->dev,
2580 "%s USB controller initialized as device\n",
2581 (udc->soc_type == PORT_QE) ? "QE" : "CPM");
2582 return 0;
2583
2584 err5:
2585 free_irq(udc->usb_irq, udc);
2586 err4:
2587 irq_dispose_mapping(udc->usb_irq);
2588 err_noirq:
2589 if (udc->nullmap) {
2590 dma_unmap_single(udc->gadget.dev.parent,
2591 udc->nullp, 256,
2592 DMA_TO_DEVICE);
2593 udc->nullp = DMA_ADDR_INVALID;
2594 } else {
2595 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2596 udc->nullp, 256,
2597 DMA_TO_DEVICE);
2598 }
2599 err3:
2600 ep = &udc->eps[0];
2601 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2602 kfree(ep->rxframe);
2603 kfree(ep->rxbuffer);
2604 kfree(ep->txframe);
2605 err2:
2606 iounmap(udc->usb_regs);
2607 err1:
2608 kfree(udc);
2609 return ret;
2610 }
2611
2612 #ifdef CONFIG_PM
2613 static int qe_udc_suspend(struct platform_device *dev, pm_message_t state)
2614 {
2615 return -ENOTSUPP;
2616 }
2617
2618 static int qe_udc_resume(struct platform_device *dev)
2619 {
2620 return -ENOTSUPP;
2621 }
2622 #endif
2623
2624 static int qe_udc_remove(struct platform_device *ofdev)
2625 {
2626 struct qe_udc *udc = platform_get_drvdata(ofdev);
2627 struct qe_ep *ep;
2628 unsigned int size;
2629 DECLARE_COMPLETION_ONSTACK(done);
2630
2631 usb_del_gadget_udc(&udc->gadget);
2632
2633 udc->done = &done;
2634 tasklet_disable(&udc->rx_tasklet);
2635
2636 if (udc->nullmap) {
2637 dma_unmap_single(udc->gadget.dev.parent,
2638 udc->nullp, 256,
2639 DMA_TO_DEVICE);
2640 udc->nullp = DMA_ADDR_INVALID;
2641 } else {
2642 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2643 udc->nullp, 256,
2644 DMA_TO_DEVICE);
2645 }
2646
2647 ep = &udc->eps[0];
2648 cpm_muram_free(cpm_muram_offset(ep->rxbase));
2649 size = (ep->ep.maxpacket + USB_CRC_SIZE + 2) * (USB_BDRING_LEN + 1);
2650
2651 kfree(ep->rxframe);
2652 if (ep->rxbufmap) {
2653 dma_unmap_single(udc->gadget.dev.parent,
2654 ep->rxbuf_d, size,
2655 DMA_FROM_DEVICE);
2656 ep->rxbuf_d = DMA_ADDR_INVALID;
2657 } else {
2658 dma_sync_single_for_cpu(udc->gadget.dev.parent,
2659 ep->rxbuf_d, size,
2660 DMA_FROM_DEVICE);
2661 }
2662
2663 kfree(ep->rxbuffer);
2664 kfree(ep->txframe);
2665
2666 free_irq(udc->usb_irq, udc);
2667 irq_dispose_mapping(udc->usb_irq);
2668
2669 tasklet_kill(&udc->rx_tasklet);
2670
2671 iounmap(udc->usb_regs);
2672
2673 /* wait for release() of gadget.dev to free udc */
2674 wait_for_completion(&done);
2675
2676 return 0;
2677 }
2678
2679 /*-------------------------------------------------------------------------*/
2680 static const struct of_device_id qe_udc_match[] = {
2681 {
2682 .compatible = "fsl,mpc8323-qe-usb",
2683 .data = (void *)PORT_QE,
2684 },
2685 {
2686 .compatible = "fsl,mpc8360-qe-usb",
2687 .data = (void *)PORT_QE,
2688 },
2689 {
2690 .compatible = "fsl,mpc8272-cpm-usb",
2691 .data = (void *)PORT_CPM,
2692 },
2693 {},
2694 };
2695
2696 MODULE_DEVICE_TABLE(of, qe_udc_match);
2697
2698 static struct platform_driver udc_driver = {
2699 .driver = {
2700 .name = driver_name,
2701 .of_match_table = qe_udc_match,
2702 },
2703 .probe = qe_udc_probe,
2704 .remove = qe_udc_remove,
2705 #ifdef CONFIG_PM
2706 .suspend = qe_udc_suspend,
2707 .resume = qe_udc_resume,
2708 #endif
2709 };
2710
2711 module_platform_driver(udc_driver);
2712
2713 MODULE_DESCRIPTION(DRIVER_DESC);
2714 MODULE_AUTHOR(DRIVER_AUTHOR);
2715 MODULE_LICENSE("GPL");
Linux with added FPC-III support