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usb: gadget: udc: mv_u3d: do not rely on 'driver' argument
[linux-block.git] / drivers / usb / gadget / udc / mv_udc_core.c
CommitLineData
dde34cc5
NZ		 1/*
2 * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
3 * Author: Chao Xie <chao.xie@marvell.com>
4 * Neil Zhang <zhangwm@marvell.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
e7cddda4 12#include <linux/module.h>
13#include <linux/pci.h>
14#include <linux/dma-mapping.h>
15#include <linux/dmapool.h>
16#include <linux/kernel.h>
17#include <linux/delay.h>
18#include <linux/ioport.h>
19#include <linux/sched.h>
20#include <linux/slab.h>
21#include <linux/errno.h>
ded017ee 22#include <linux/err.h>
e7cddda4 23#include <linux/timer.h>
24#include <linux/list.h>
25#include <linux/interrupt.h>
26#include <linux/moduleparam.h>
27#include <linux/device.h>
28#include <linux/usb/ch9.h>
29#include <linux/usb/gadget.h>
30#include <linux/usb/otg.h>
31#include <linux/pm.h>
32#include <linux/io.h>
33#include <linux/irq.h>
34#include <linux/platform_device.h>
35#include <linux/clk.h>
dde34cc5 36#include <linux/platform_data/mv_usb.h>
e7cddda4 37#include <asm/unaligned.h>
38
39#include "mv_udc.h"
40
41#define DRIVER_DESC "Marvell PXA USB Device Controller driver"
42#define DRIVER_VERSION "8 Nov 2010"
43
44#define ep_dir(ep) (((ep)->ep_num == 0) ? \
45 ((ep)->udc->ep0_dir) : ((ep)->direction))
46
47/* timeout value -- usec */
48#define RESET_TIMEOUT 10000
49#define FLUSH_TIMEOUT 10000
50#define EPSTATUS_TIMEOUT 10000
51#define PRIME_TIMEOUT 10000
52#define READSAFE_TIMEOUT 1000
e7cddda4 53
9b2035a0 54#define LOOPS_USEC_SHIFT 1
e7cddda4 55#define LOOPS_USEC (1 << LOOPS_USEC_SHIFT)
56#define LOOPS(timeout) ((timeout) >> LOOPS_USEC_SHIFT)
57
dde34cc5
NZ		 58static DECLARE_COMPLETION(release_done);
59
e7cddda4 60static const char driver_name[] = "mv_udc";
61static const char driver_desc[] = DRIVER_DESC;
62
e7cddda4 63static void nuke(struct mv_ep *ep, int status);
1aec033b 64static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver);
e7cddda4 65
66/* for endpoint 0 operations */
67static const struct usb_endpoint_descriptor mv_ep0_desc = {
68 .bLength = USB_DT_ENDPOINT_SIZE,
69 .bDescriptorType = USB_DT_ENDPOINT,
70 .bEndpointAddress = 0,
71 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
72 .wMaxPacketSize = EP0_MAX_PKT_SIZE,
73};
74
75static void ep0_reset(struct mv_udc *udc)
76{
77 struct mv_ep *ep;
78 u32 epctrlx;
79 int i = 0;
80
81 /* ep0 in and out */
82 for (i = 0; i < 2; i++) {
83 ep = &udc->eps[i];
84 ep->udc = udc;
85
86 /* ep0 dQH */
87 ep->dqh = &udc->ep_dqh[i];
88
89 /* configure ep0 endpoint capabilities in dQH */
90 ep->dqh->max_packet_length =
91 (EP0_MAX_PKT_SIZE << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
92 | EP_QUEUE_HEAD_IOS;
93
fbebe1f0
NZ		 94 ep->dqh->next_dtd_ptr = EP_QUEUE_HEAD_NEXT_TERMINATE;
95
e7cddda4 96 epctrlx = readl(&udc->op_regs->epctrlx[0]);
97 if (i) { /* TX */
43ad9f3f 98 epctrlx |= EPCTRL_TX_ENABLE
e7cddda4 99 | (USB_ENDPOINT_XFER_CONTROL
100 << EPCTRL_TX_EP_TYPE_SHIFT);
101
102 } else { /* RX */
43ad9f3f 103 epctrlx |= EPCTRL_RX_ENABLE
e7cddda4 104 | (USB_ENDPOINT_XFER_CONTROL
105 << EPCTRL_RX_EP_TYPE_SHIFT);
106 }
107
108 writel(epctrlx, &udc->op_regs->epctrlx[0]);
109 }
110}
111
112/* protocol ep0 stall, will automatically be cleared on new transaction */
113static void ep0_stall(struct mv_udc *udc)
114{
115 u32 epctrlx;
116
117 /* set TX and RX to stall */
118 epctrlx = readl(&udc->op_regs->epctrlx[0]);
119 epctrlx |= EPCTRL_RX_EP_STALL | EPCTRL_TX_EP_STALL;
120 writel(epctrlx, &udc->op_regs->epctrlx[0]);
121
122 /* update ep0 state */
123 udc->ep0_state = WAIT_FOR_SETUP;
124 udc->ep0_dir = EP_DIR_OUT;
125}
126
127static int process_ep_req(struct mv_udc *udc, int index,
128 struct mv_req *curr_req)
129{
130 struct mv_dtd *curr_dtd;
131 struct mv_dqh *curr_dqh;
132 int td_complete, actual, remaining_length;
133 int i, direction;
134 int retval = 0;
135 u32 errors;
daec765d 136 u32 bit_pos;
e7cddda4 137
138 curr_dqh = &udc->ep_dqh[index];
139 direction = index % 2;
140
141 curr_dtd = curr_req->head;
142 td_complete = 0;
143 actual = curr_req->req.length;
144
145 for (i = 0; i < curr_req->dtd_count; i++) {
146 if (curr_dtd->size_ioc_sts & DTD_STATUS_ACTIVE) {
147 dev_dbg(&udc->dev->dev, "%s, dTD not completed\n",
148 udc->eps[index].name);
149 return 1;
150 }
151
152 errors = curr_dtd->size_ioc_sts & DTD_ERROR_MASK;
153 if (!errors) {
daec765d 154 remaining_length =
e7cddda4 155 (curr_dtd->size_ioc_sts & DTD_PACKET_SIZE)
156 >> DTD_LENGTH_BIT_POS;
157 actual -= remaining_length;
daec765d
NZ		 158
159 if (remaining_length) {
160 if (direction) {
161 dev_dbg(&udc->dev->dev,
162 "TX dTD remains data\n");
163 retval = -EPROTO;
164 break;
165 } else
166 break;
167 }
e7cddda4 168 } else {
169 dev_info(&udc->dev->dev,
170 "complete_tr error: ep=%d %s: error = 0x%x\n",
171 index >> 1, direction ? "SEND" : "RECV",
172 errors);
173 if (errors & DTD_STATUS_HALTED) {
174 /* Clear the errors and Halt condition */
175 curr_dqh->size_ioc_int_sts &= ~errors;
176 retval = -EPIPE;
177 } else if (errors & DTD_STATUS_DATA_BUFF_ERR) {
178 retval = -EPROTO;
179 } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
180 retval = -EILSEQ;
181 }
182 }
183 if (i != curr_req->dtd_count - 1)
184 curr_dtd = (struct mv_dtd *)curr_dtd->next_dtd_virt;
185 }
186 if (retval)
187 return retval;
188
daec765d
NZ		 189 if (direction == EP_DIR_OUT)
190 bit_pos = 1 << curr_req->ep->ep_num;
191 else
192 bit_pos = 1 << (16 + curr_req->ep->ep_num);
193
194 while ((curr_dqh->curr_dtd_ptr == curr_dtd->td_dma)) {
195 if (curr_dtd->dtd_next == EP_QUEUE_HEAD_NEXT_TERMINATE) {
196 while (readl(&udc->op_regs->epstatus) & bit_pos)
197 udelay(1);
198 break;
199 }
200 udelay(1);
201 }
202
e7cddda4 203 curr_req->req.actual = actual;
204
205 return 0;
206}
207
208/*
209 * done() - retire a request; caller blocked irqs
210 * @status : request status to be set, only works when
211 * request is still in progress.
212 */
213static void done(struct mv_ep *ep, struct mv_req *req, int status)
94a06018
FB		 214 __releases(&ep->udc->lock)
215 __acquires(&ep->udc->lock)
e7cddda4 216{
217 struct mv_udc *udc = NULL;
218 unsigned char stopped = ep->stopped;
219 struct mv_dtd *curr_td, *next_td;
220 int j;
221
222 udc = (struct mv_udc *)ep->udc;
223 /* Removed the req from fsl_ep->queue */
224 list_del_init(&req->queue);
225
226 /* req.status should be set as -EINPROGRESS in ep_queue() */
227 if (req->req.status == -EINPROGRESS)
228 req->req.status = status;
229 else
230 status = req->req.status;
231
232 /* Free dtd for the request */
233 next_td = req->head;
234 for (j = 0; j < req->dtd_count; j++) {
235 curr_td = next_td;
236 if (j != req->dtd_count - 1)
237 next_td = curr_td->next_dtd_virt;
238 dma_pool_free(udc->dtd_pool, curr_td, curr_td->td_dma);
239 }
240
4c0c6d00 241 usb_gadget_unmap_request(&udc->gadget, &req->req, ep_dir(ep));
e7cddda4 242
243 if (status && (status != -ESHUTDOWN))
244 dev_info(&udc->dev->dev, "complete %s req %p stat %d len %u/%u",
245 ep->ep.name, &req->req, status,
246 req->req.actual, req->req.length);
247
248 ep->stopped = 1;
249
250 spin_unlock(&ep->udc->lock);
304f7e5e
MS		 251
252 usb_gadget_giveback_request(&ep->ep, &req->req);
e7cddda4 253
254 spin_lock(&ep->udc->lock);
255 ep->stopped = stopped;
256}
257
258static int queue_dtd(struct mv_ep *ep, struct mv_req *req)
259{
e7cddda4 260 struct mv_udc *udc;
261 struct mv_dqh *dqh;
91d959d8
NZ		 262 u32 bit_pos, direction;
263 u32 usbcmd, epstatus;
e7cddda4 264 unsigned int loops;
91d959d8 265 int retval = 0;
e7cddda4 266
267 udc = ep->udc;
268 direction = ep_dir(ep);
269 dqh = &(udc->ep_dqh[ep->ep_num * 2 + direction]);
270 bit_pos = 1 << (((direction == EP_DIR_OUT) ? 0 : 16) + ep->ep_num);
271
272 /* check if the pipe is empty */
273 if (!(list_empty(&ep->queue))) {
274 struct mv_req *lastreq;
275 lastreq = list_entry(ep->queue.prev, struct mv_req, queue);
276 lastreq->tail->dtd_next =
277 req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
91d959d8
NZ		 278
279 wmb();
280
281 if (readl(&udc->op_regs->epprime) & bit_pos)
282 goto done;
283
e7cddda4 284 loops = LOOPS(READSAFE_TIMEOUT);
91d959d8 285 while (1) {
e7cddda4 286 /* start with setting the semaphores */
91d959d8
NZ		 287 usbcmd = readl(&udc->op_regs->usbcmd);
288 usbcmd |= USBCMD_ATDTW_TRIPWIRE_SET;
289 writel(usbcmd, &udc->op_regs->usbcmd);
e7cddda4 290
291 /* read the endpoint status */
292 epstatus = readl(&udc->op_regs->epstatus) & bit_pos;
293
294 /*
295 * Reread the ATDTW semaphore bit to check if it is
296 * cleared. When hardware see a hazard, it will clear
297 * the bit or else we remain set to 1 and we can
298 * proceed with priming of endpoint if not already
299 * primed.
300 */
301 if (readl(&udc->op_regs->usbcmd)
91d959d8
NZ		 302 & USBCMD_ATDTW_TRIPWIRE_SET)
303 break;
304
e7cddda4 305 loops--;
91d959d8
NZ		 306 if (loops == 0) {
307 dev_err(&udc->dev->dev,
308 "Timeout for ATDTW_TRIPWIRE...\n");
309 retval = -ETIME;
310 goto done;
311 }
e7cddda4 312 udelay(LOOPS_USEC);
313 }
314
315 /* Clear the semaphore */
91d959d8
NZ		 316 usbcmd = readl(&udc->op_regs->usbcmd);
317 usbcmd &= USBCMD_ATDTW_TRIPWIRE_CLEAR;
318 writel(usbcmd, &udc->op_regs->usbcmd);
e7cddda4 319
91d959d8
NZ		 320 if (epstatus)
321 goto done;
322 }
e7cddda4 323
91d959d8
NZ		 324 /* Write dQH next pointer and terminate bit to 0 */
325 dqh->next_dtd_ptr = req->head->td_dma
e7cddda4 326 & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
e7cddda4 327
91d959d8
NZ		 328 /* clear active and halt bit, in case set from a previous error */
329 dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED);
e7cddda4 330
f6d9d89f 331 /* Ensure that updates to the QH will occur before priming. */
91d959d8 332 wmb();
e7cddda4 333
91d959d8
NZ		 334 /* Prime the Endpoint */
335 writel(bit_pos, &udc->op_regs->epprime);
e7cddda4 336
e7cddda4 337done:
69932487 338 return retval;
e7cddda4 339}
340
341static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length,
342 dma_addr_t *dma, int *is_last)
343{
e7cddda4 344 struct mv_dtd *dtd;
345 struct mv_udc *udc;
60326ce3
CX		 346 struct mv_dqh *dqh;
347 u32 temp, mult = 0;
e7cddda4 348
349 /* how big will this transfer be? */
60326ce3
CX		 350 if (usb_endpoint_xfer_isoc(req->ep->ep.desc)) {
351 dqh = req->ep->dqh;
352 mult = (dqh->max_packet_length >> EP_QUEUE_HEAD_MULT_POS)
353 & 0x3;
354 *length = min(req->req.length - req->req.actual,
355 (unsigned)(mult * req->ep->ep.maxpacket));
356 } else
357 *length = min(req->req.length - req->req.actual,
358 (unsigned)EP_MAX_LENGTH_TRANSFER);
e7cddda4 359
360 udc = req->ep->udc;
361
362 /*
363 * Be careful that no _GFP_HIGHMEM is set,
364 * or we can not use dma_to_virt
365 */
0344606b 366 dtd = dma_pool_alloc(udc->dtd_pool, GFP_ATOMIC, dma);
e7cddda4 367 if (dtd == NULL)
368 return dtd;
369
370 dtd->td_dma = *dma;
371 /* initialize buffer page pointers */
372 temp = (u32)(req->req.dma + req->req.actual);
373 dtd->buff_ptr0 = cpu_to_le32(temp);
374 temp &= ~0xFFF;
375 dtd->buff_ptr1 = cpu_to_le32(temp + 0x1000);
376 dtd->buff_ptr2 = cpu_to_le32(temp + 0x2000);
377 dtd->buff_ptr3 = cpu_to_le32(temp + 0x3000);
378 dtd->buff_ptr4 = cpu_to_le32(temp + 0x4000);
379
380 req->req.actual += *length;
381
382 /* zlp is needed if req->req.zero is set */
383 if (req->req.zero) {
384 if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
385 *is_last = 1;
386 else
387 *is_last = 0;
388 } else if (req->req.length == req->req.actual)
389 *is_last = 1;
390 else
391 *is_last = 0;
392
393 /* Fill in the transfer size; set active bit */
394 temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
395
396 /* Enable interrupt for the last dtd of a request */
397 if (*is_last && !req->req.no_interrupt)
398 temp |= DTD_IOC;
399
60326ce3
CX		 400 temp |= mult << 10;
401
e7cddda4 402 dtd->size_ioc_sts = temp;
403
404 mb();
405
406 return dtd;
407}
408
409/* generate dTD linked list for a request */
410static int req_to_dtd(struct mv_req *req)
411{
412 unsigned count;
413 int is_last, is_first = 1;
414 struct mv_dtd *dtd, *last_dtd = NULL;
415 struct mv_udc *udc;
416 dma_addr_t dma;
417
418 udc = req->ep->udc;
419
420 do {
421 dtd = build_dtd(req, &count, &dma, &is_last);
422 if (dtd == NULL)
423 return -ENOMEM;
424
425 if (is_first) {
426 is_first = 0;
427 req->head = dtd;
428 } else {
429 last_dtd->dtd_next = dma;
430 last_dtd->next_dtd_virt = dtd;
431 }
432 last_dtd = dtd;
433 req->dtd_count++;
434 } while (!is_last);
435
436 /* set terminate bit to 1 for the last dTD */
437 dtd->dtd_next = DTD_NEXT_TERMINATE;
438
439 req->tail = dtd;
440
441 return 0;
442}
443
444static int mv_ep_enable(struct usb_ep *_ep,
445 const struct usb_endpoint_descriptor *desc)
446{
447 struct mv_udc *udc;
448 struct mv_ep *ep;
449 struct mv_dqh *dqh;
450 u16 max = 0;
451 u32 bit_pos, epctrlx, direction;
452 unsigned char zlt = 0, ios = 0, mult = 0;
27cec2b2 453 unsigned long flags;
e7cddda4 454
455 ep = container_of(_ep, struct mv_ep, ep);
456 udc = ep->udc;
457
e0f4f9d4 458 if (!_ep || !desc
e7cddda4 459 || desc->bDescriptorType != USB_DT_ENDPOINT)
460 return -EINVAL;
461
462 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
463 return -ESHUTDOWN;
464
465 direction = ep_dir(ep);
29cc8897 466 max = usb_endpoint_maxp(desc);
e7cddda4 467
468 /*
469 * disable HW zero length termination select
470 * driver handles zero length packet through req->req.zero
471 */
472 zlt = 1;
473
e7cddda4 474 bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num);
475
476 /* Check if the Endpoint is Primed */
477 if ((readl(&udc->op_regs->epprime) & bit_pos)
478 || (readl(&udc->op_regs->epstatus) & bit_pos)) {
479 dev_info(&udc->dev->dev,
480 "ep=%d %s: Init ERROR: ENDPTPRIME=0x%x,"
481 " ENDPTSTATUS=0x%x, bit_pos=0x%x\n",
482 (unsigned)ep->ep_num, direction ? "SEND" : "RECV",
483 (unsigned)readl(&udc->op_regs->epprime),
484 (unsigned)readl(&udc->op_regs->epstatus),
485 (unsigned)bit_pos);
486 goto en_done;
487 }
488 /* Set the max packet length, interrupt on Setup and Mult fields */
489 switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
490 case USB_ENDPOINT_XFER_BULK:
491 zlt = 1;
492 mult = 0;
493 break;
494 case USB_ENDPOINT_XFER_CONTROL:
495 ios = 1;
496 case USB_ENDPOINT_XFER_INT:
497 mult = 0;
498 break;
499 case USB_ENDPOINT_XFER_ISOC:
500 /* Calculate transactions needed for high bandwidth iso */
501 mult = (unsigned char)(1 + ((max >> 11) & 0x03));
bedcff97 502 max = max & 0x7ff; /* bit 0~10 */
e7cddda4 503 /* 3 transactions at most */
504 if (mult > 3)
505 goto en_done;
506 break;
507 default:
508 goto en_done;
509 }
27cec2b2
NZ		 510
511 spin_lock_irqsave(&udc->lock, flags);
512 /* Get the endpoint queue head address */
513 dqh = ep->dqh;
e7cddda4 514 dqh->max_packet_length = (max << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
515 | (mult << EP_QUEUE_HEAD_MULT_POS)
516 | (zlt ? EP_QUEUE_HEAD_ZLT_SEL : 0)
517 | (ios ? EP_QUEUE_HEAD_IOS : 0);
518 dqh->next_dtd_ptr = 1;
519 dqh->size_ioc_int_sts = 0;
520
521 ep->ep.maxpacket = max;
b1371d16 522 ep->ep.desc = desc;
e7cddda4 523 ep->stopped = 0;
524
525 /* Enable the endpoint for Rx or Tx and set the endpoint type */
526 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
527 if (direction == EP_DIR_IN) {
528 epctrlx &= ~EPCTRL_TX_ALL_MASK;
529 epctrlx |= EPCTRL_TX_ENABLE | EPCTRL_TX_DATA_TOGGLE_RST
530 | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
531 << EPCTRL_TX_EP_TYPE_SHIFT);
532 } else {
533 epctrlx &= ~EPCTRL_RX_ALL_MASK;
534 epctrlx |= EPCTRL_RX_ENABLE | EPCTRL_RX_DATA_TOGGLE_RST
535 | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
536 << EPCTRL_RX_EP_TYPE_SHIFT);
537 }
538 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
539
540 /*
541 * Implement Guideline (GL# USB-7) The unused endpoint type must
542 * be programmed to bulk.
543 */
544 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
545 if ((epctrlx & EPCTRL_RX_ENABLE) == 0) {
615268b0 546 epctrlx |= (USB_ENDPOINT_XFER_BULK
e7cddda4 547 << EPCTRL_RX_EP_TYPE_SHIFT);
548 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
549 }
550
551 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
552 if ((epctrlx & EPCTRL_TX_ENABLE) == 0) {
615268b0 553 epctrlx |= (USB_ENDPOINT_XFER_BULK
e7cddda4 554 << EPCTRL_TX_EP_TYPE_SHIFT);
555 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
556 }
557
27cec2b2
NZ		 558 spin_unlock_irqrestore(&udc->lock, flags);
559
e7cddda4 560 return 0;
561en_done:
562 return -EINVAL;
563}
564
565static int mv_ep_disable(struct usb_ep *_ep)
566{
567 struct mv_udc *udc;
568 struct mv_ep *ep;
569 struct mv_dqh *dqh;
570 u32 bit_pos, epctrlx, direction;
27cec2b2 571 unsigned long flags;
e7cddda4 572
573 ep = container_of(_ep, struct mv_ep, ep);
b1371d16 574 if ((_ep == NULL) || !ep->ep.desc)
e7cddda4 575 return -EINVAL;
576
577 udc = ep->udc;
578
579 /* Get the endpoint queue head address */
580 dqh = ep->dqh;
581
27cec2b2
NZ		 582 spin_lock_irqsave(&udc->lock, flags);
583
e7cddda4 584 direction = ep_dir(ep);
585 bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num);
586
587 /* Reset the max packet length and the interrupt on Setup */
588 dqh->max_packet_length = 0;
589
590 /* Disable the endpoint for Rx or Tx and reset the endpoint type */
591 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
592 epctrlx &= ~((direction == EP_DIR_IN)
593 ? (EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE)
594 : (EPCTRL_RX_ENABLE | EPCTRL_RX_TYPE));
595 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
596
597 /* nuke all pending requests (does flush) */
598 nuke(ep, -ESHUTDOWN);
599
f9c56cdd 600 ep->ep.desc = NULL;
e7cddda4 601 ep->stopped = 1;
27cec2b2
NZ		 602
603 spin_unlock_irqrestore(&udc->lock, flags);
604
e7cddda4 605 return 0;
606}
607
608static struct usb_request *
609mv_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
610{
611 struct mv_req *req = NULL;
612
613 req = kzalloc(sizeof *req, gfp_flags);
614 if (!req)
615 return NULL;
616
617 req->req.dma = DMA_ADDR_INVALID;
618 INIT_LIST_HEAD(&req->queue);
619
620 return &req->req;
621}
622
623static void mv_free_request(struct usb_ep *_ep, struct usb_request *_req)
624{
625 struct mv_req *req = NULL;
626
627 req = container_of(_req, struct mv_req, req);
628
629 if (_req)
630 kfree(req);
631}
632
633static void mv_ep_fifo_flush(struct usb_ep *_ep)
634{
635 struct mv_udc *udc;
636 u32 bit_pos, direction;
0c70840b 637 struct mv_ep *ep;
e7cddda4 638 unsigned int loops;
639
0c70840b
NZ		 640 if (!_ep)
641 return;
642
643 ep = container_of(_ep, struct mv_ep, ep);
b1371d16 644 if (!ep->ep.desc)
0c70840b
NZ		 645 return;
646
e7cddda4 647 udc = ep->udc;
648 direction = ep_dir(ep);
e7cddda4 649
0c70840b
NZ		 650 if (ep->ep_num == 0)
651 bit_pos = (1 << 16) | 1;
652 else if (direction == EP_DIR_OUT)
653 bit_pos = 1 << ep->ep_num;
654 else
655 bit_pos = 1 << (16 + ep->ep_num);
656
e7cddda4 657 loops = LOOPS(EPSTATUS_TIMEOUT);
0c70840b 658 do {
e7cddda4 659 unsigned int inter_loops;
660
661 if (loops == 0) {
662 dev_err(&udc->dev->dev,
663 "TIMEOUT for ENDPTSTATUS=0x%x, bit_pos=0x%x\n",
664 (unsigned)readl(&udc->op_regs->epstatus),
665 (unsigned)bit_pos);
666 return;
667 }
668 /* Write 1 to the Flush register */
669 writel(bit_pos, &udc->op_regs->epflush);
670
671 /* Wait until flushing completed */
672 inter_loops = LOOPS(FLUSH_TIMEOUT);
0c70840b 673 while (readl(&udc->op_regs->epflush)) {
e7cddda4 674 /*
675 * ENDPTFLUSH bit should be cleared to indicate this
676 * operation is complete
677 */
678 if (inter_loops == 0) {
679 dev_err(&udc->dev->dev,
680 "TIMEOUT for ENDPTFLUSH=0x%x,"
681 "bit_pos=0x%x\n",
682 (unsigned)readl(&udc->op_regs->epflush),
683 (unsigned)bit_pos);
684 return;
685 }
686 inter_loops--;
687 udelay(LOOPS_USEC);
688 }
689 loops--;
0c70840b 690 } while (readl(&udc->op_regs->epstatus) & bit_pos);
e7cddda4 691}
692
693/* queues (submits) an I/O request to an endpoint */
694static int
695mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
696{
697 struct mv_ep *ep = container_of(_ep, struct mv_ep, ep);
698 struct mv_req *req = container_of(_req, struct mv_req, req);
699 struct mv_udc *udc = ep->udc;
700 unsigned long flags;
0344606b 701 int retval;
e7cddda4 702
703 /* catch various bogus parameters */
704 if (!_req || !req->req.complete || !req->req.buf
705 || !list_empty(&req->queue)) {
706 dev_err(&udc->dev->dev, "%s, bad params", __func__);
707 return -EINVAL;
708 }
b1371d16 709 if (unlikely(!_ep || !ep->ep.desc)) {
e7cddda4 710 dev_err(&udc->dev->dev, "%s, bad ep", __func__);
711 return -EINVAL;
712 }
e7cddda4 713
714 udc = ep->udc;
715 if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
716 return -ESHUTDOWN;
717
718 req->ep = ep;
719
720 /* map virtual address to hardware */
4c0c6d00
FB		 721 retval = usb_gadget_map_request(&udc->gadget, _req, ep_dir(ep));
722 if (retval)
723 return retval;
e7cddda4 724
725 req->req.status = -EINPROGRESS;
726 req->req.actual = 0;
727 req->dtd_count = 0;
728
729 spin_lock_irqsave(&udc->lock, flags);
730
731 /* build dtds and push them to device queue */
732 if (!req_to_dtd(req)) {
e7cddda4 733 retval = queue_dtd(ep, req);
734 if (retval) {
735 spin_unlock_irqrestore(&udc->lock, flags);
0344606b
NZ		 736 dev_err(&udc->dev->dev, "Failed to queue dtd\n");
737 goto err_unmap_dma;
e7cddda4 738 }
739 } else {
740 spin_unlock_irqrestore(&udc->lock, flags);
0344606b
NZ		 741 dev_err(&udc->dev->dev, "Failed to dma_pool_alloc\n");
742 retval = -ENOMEM;
743 goto err_unmap_dma;
e7cddda4 744 }
745
746 /* Update ep0 state */
747 if (ep->ep_num == 0)
748 udc->ep0_state = DATA_STATE_XMIT;
749
750 /* irq handler advances the queue */
10800f2c 751 list_add_tail(&req->queue, &ep->queue);
e7cddda4 752 spin_unlock_irqrestore(&udc->lock, flags);
753
754 return 0;
0344606b
NZ		 755
756err_unmap_dma:
4c0c6d00 757 usb_gadget_unmap_request(&udc->gadget, _req, ep_dir(ep));
0344606b
NZ		 758
759 return retval;
e7cddda4 760}
761
c2bbd16b
NZ		 762static void mv_prime_ep(struct mv_ep *ep, struct mv_req *req)
763{
764 struct mv_dqh *dqh = ep->dqh;
765 u32 bit_pos;
766
767 /* Write dQH next pointer and terminate bit to 0 */
768 dqh->next_dtd_ptr = req->head->td_dma
769 & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
770
771 /* clear active and halt bit, in case set from a previous error */
772 dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED);
773
774 /* Ensure that updates to the QH will occure before priming. */
775 wmb();
776
777 bit_pos = 1 << (((ep_dir(ep) == EP_DIR_OUT) ? 0 : 16) + ep->ep_num);
778
779 /* Prime the Endpoint */
780 writel(bit_pos, &ep->udc->op_regs->epprime);
781}
782
e7cddda4 783/* dequeues (cancels, unlinks) an I/O request from an endpoint */
784static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
785{
786 struct mv_ep *ep = container_of(_ep, struct mv_ep, ep);
787 struct mv_req *req;
788 struct mv_udc *udc = ep->udc;
789 unsigned long flags;
790 int stopped, ret = 0;
791 u32 epctrlx;
792
793 if (!_ep || !_req)
794 return -EINVAL;
795
796 spin_lock_irqsave(&ep->udc->lock, flags);
797 stopped = ep->stopped;
798
799 /* Stop the ep before we deal with the queue */
800 ep->stopped = 1;
801 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
802 if (ep_dir(ep) == EP_DIR_IN)
803 epctrlx &= ~EPCTRL_TX_ENABLE;
804 else
805 epctrlx &= ~EPCTRL_RX_ENABLE;
806 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
807
808 /* make sure it's actually queued on this endpoint */
809 list_for_each_entry(req, &ep->queue, queue) {
810 if (&req->req == _req)
811 break;
812 }
813 if (&req->req != _req) {
814 ret = -EINVAL;
815 goto out;
816 }
817
818 /* The request is in progress, or completed but not dequeued */
819 if (ep->queue.next == &req->queue) {
820 _req->status = -ECONNRESET;
821 mv_ep_fifo_flush(_ep); /* flush current transfer */
822
823 /* The request isn't the last request in this ep queue */
824 if (req->queue.next != &ep->queue) {
e7cddda4 825 struct mv_req *next_req;
826
c2bbd16b
NZ		 827 next_req = list_entry(req->queue.next,
828 struct mv_req, queue);
e7cddda4 829
830 /* Point the QH to the first TD of next request */
c2bbd16b 831 mv_prime_ep(ep, next_req);
e7cddda4 832 } else {
833 struct mv_dqh *qh;
834
835 qh = ep->dqh;
836 qh->next_dtd_ptr = 1;
837 qh->size_ioc_int_sts = 0;
838 }
839
840 /* The request hasn't been processed, patch up the TD chain */
841 } else {
842 struct mv_req *prev_req;
843
844 prev_req = list_entry(req->queue.prev, struct mv_req, queue);
845 writel(readl(&req->tail->dtd_next),
846 &prev_req->tail->dtd_next);
847
848 }
849
850 done(ep, req, -ECONNRESET);
851
852 /* Enable EP */
853out:
854 epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]);
855 if (ep_dir(ep) == EP_DIR_IN)
856 epctrlx |= EPCTRL_TX_ENABLE;
857 else
858 epctrlx |= EPCTRL_RX_ENABLE;
859 writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]);
860 ep->stopped = stopped;
861
862 spin_unlock_irqrestore(&ep->udc->lock, flags);
863 return ret;
864}
865
866static void ep_set_stall(struct mv_udc *udc, u8 ep_num, u8 direction, int stall)
867{
868 u32 epctrlx;
869
870 epctrlx = readl(&udc->op_regs->epctrlx[ep_num]);
871
872 if (stall) {
873 if (direction == EP_DIR_IN)
874 epctrlx |= EPCTRL_TX_EP_STALL;
875 else
876 epctrlx |= EPCTRL_RX_EP_STALL;
877 } else {
878 if (direction == EP_DIR_IN) {
879 epctrlx &= ~EPCTRL_TX_EP_STALL;
880 epctrlx |= EPCTRL_TX_DATA_TOGGLE_RST;
881 } else {
882 epctrlx &= ~EPCTRL_RX_EP_STALL;
883 epctrlx |= EPCTRL_RX_DATA_TOGGLE_RST;
884 }
885 }
886 writel(epctrlx, &udc->op_regs->epctrlx[ep_num]);
887}
888
889static int ep_is_stall(struct mv_udc *udc, u8 ep_num, u8 direction)
890{
891 u32 epctrlx;
892
893 epctrlx = readl(&udc->op_regs->epctrlx[ep_num]);
894
895 if (direction == EP_DIR_OUT)
896 return (epctrlx & EPCTRL_RX_EP_STALL) ? 1 : 0;
897 else
898 return (epctrlx & EPCTRL_TX_EP_STALL) ? 1 : 0;
899}
900
901static int mv_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge)
902{
903 struct mv_ep *ep;
904 unsigned long flags = 0;
905 int status = 0;
906 struct mv_udc *udc;
907
908 ep = container_of(_ep, struct mv_ep, ep);
909 udc = ep->udc;
b1371d16 910 if (!_ep || !ep->ep.desc) {
e7cddda4 911 status = -EINVAL;
912 goto out;
913 }
914
b1371d16 915 if (ep->ep.desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
e7cddda4 916 status = -EOPNOTSUPP;
917 goto out;
918 }
919
920 /*
921 * Attempt to halt IN ep will fail if any transfer requests
922 * are still queue
923 */
924 if (halt && (ep_dir(ep) == EP_DIR_IN) && !list_empty(&ep->queue)) {
925 status = -EAGAIN;
926 goto out;
927 }
928
929 spin_lock_irqsave(&ep->udc->lock, flags);
930 ep_set_stall(udc, ep->ep_num, ep_dir(ep), halt);
931 if (halt && wedge)
932 ep->wedge = 1;
933 else if (!halt)
934 ep->wedge = 0;
935 spin_unlock_irqrestore(&ep->udc->lock, flags);
936
937 if (ep->ep_num == 0) {
938 udc->ep0_state = WAIT_FOR_SETUP;
939 udc->ep0_dir = EP_DIR_OUT;
940 }
941out:
942 return status;
943}
944
945static int mv_ep_set_halt(struct usb_ep *_ep, int halt)
946{
947 return mv_ep_set_halt_wedge(_ep, halt, 0);
948}
949
950static int mv_ep_set_wedge(struct usb_ep *_ep)
951{
952 return mv_ep_set_halt_wedge(_ep, 1, 1);
953}
954
955static struct usb_ep_ops mv_ep_ops = {
956 .enable = mv_ep_enable,
957 .disable = mv_ep_disable,
958
959 .alloc_request = mv_alloc_request,
960 .free_request = mv_free_request,
961
962 .queue = mv_ep_queue,
963 .dequeue = mv_ep_dequeue,
964
965 .set_wedge = mv_ep_set_wedge,
966 .set_halt = mv_ep_set_halt,
967 .fifo_flush = mv_ep_fifo_flush, /* flush fifo */
968};
969
dde34cc5
NZ		 970static void udc_clock_enable(struct mv_udc *udc)
971{
1919811f 972 clk_prepare_enable(udc->clk);
dde34cc5
NZ		 973}
974
975static void udc_clock_disable(struct mv_udc *udc)
976{
1919811f 977 clk_disable_unprepare(udc->clk);
dde34cc5
NZ		 978}
979
e7cddda4 980static void udc_stop(struct mv_udc *udc)
981{
982 u32 tmp;
983
984 /* Disable interrupts */
985 tmp = readl(&udc->op_regs->usbintr);
986 tmp &= ~(USBINTR_INT_EN | USBINTR_ERR_INT_EN |
987 USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN);
988 writel(tmp, &udc->op_regs->usbintr);
989
309d6d2b
NZ		 990 udc->stopped = 1;
991
e7cddda4 992 /* Reset the Run the bit in the command register to stop VUSB */
993 tmp = readl(&udc->op_regs->usbcmd);
994 tmp &= ~USBCMD_RUN_STOP;
995 writel(tmp, &udc->op_regs->usbcmd);
996}
997
998static void udc_start(struct mv_udc *udc)
999{
1000 u32 usbintr;
1001
1002 usbintr = USBINTR_INT_EN | USBINTR_ERR_INT_EN
1003 | USBINTR_PORT_CHANGE_DETECT_EN
1004 | USBINTR_RESET_EN | USBINTR_DEVICE_SUSPEND;
1005 /* Enable interrupts */
1006 writel(usbintr, &udc->op_regs->usbintr);
1007
309d6d2b
NZ		 1008 udc->stopped = 0;
1009
e7cddda4 1010 /* Set the Run bit in the command register */
1011 writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd);
1012}
1013
1014static int udc_reset(struct mv_udc *udc)
1015{
1016 unsigned int loops;
1017 u32 tmp, portsc;
1018
1019 /* Stop the controller */
1020 tmp = readl(&udc->op_regs->usbcmd);
1021 tmp &= ~USBCMD_RUN_STOP;
1022 writel(tmp, &udc->op_regs->usbcmd);
1023
1024 /* Reset the controller to get default values */
1025 writel(USBCMD_CTRL_RESET, &udc->op_regs->usbcmd);
1026
1027 /* wait for reset to complete */
1028 loops = LOOPS(RESET_TIMEOUT);
1029 while (readl(&udc->op_regs->usbcmd) & USBCMD_CTRL_RESET) {
1030 if (loops == 0) {
1031 dev_err(&udc->dev->dev,
1032 "Wait for RESET completed TIMEOUT\n");
1033 return -ETIMEDOUT;
1034 }
1035 loops--;
1036 udelay(LOOPS_USEC);
1037 }
1038
1039 /* set controller to device mode */
1040 tmp = readl(&udc->op_regs->usbmode);
1041 tmp |= USBMODE_CTRL_MODE_DEVICE;
1042
1043 /* turn setup lockout off, require setup tripwire in usbcmd */
583a7263 1044 tmp |= USBMODE_SETUP_LOCK_OFF;
e7cddda4 1045
1046 writel(tmp, &udc->op_regs->usbmode);
1047
1048 writel(0x0, &udc->op_regs->epsetupstat);
1049
1050 /* Configure the Endpoint List Address */
1051 writel(udc->ep_dqh_dma & USB_EP_LIST_ADDRESS_MASK,
1052 &udc->op_regs->eplistaddr);
1053
1054 portsc = readl(&udc->op_regs->portsc[0]);
1055 if (readl(&udc->cap_regs->hcsparams) & HCSPARAMS_PPC)
1056 portsc &= (~PORTSCX_W1C_BITS | ~PORTSCX_PORT_POWER);
1057
1058 if (udc->force_fs)
1059 portsc |= PORTSCX_FORCE_FULL_SPEED_CONNECT;
1060 else
1061 portsc &= (~PORTSCX_FORCE_FULL_SPEED_CONNECT);
1062
1063 writel(portsc, &udc->op_regs->portsc[0]);
1064
1065 tmp = readl(&udc->op_regs->epctrlx[0]);
1066 tmp &= ~(EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL);
1067 writel(tmp, &udc->op_regs->epctrlx[0]);
1068
1069 return 0;
1070}
1071
85ff7bfb 1072static int mv_udc_enable_internal(struct mv_udc *udc)
1aec033b
NZ		 1073{
1074 int retval;
1075
85ff7bfb 1076 if (udc->active)
1aec033b
NZ		 1077 return 0;
1078
1079 dev_dbg(&udc->dev->dev, "enable udc\n");
1080 udc_clock_enable(udc);
1081 if (udc->pdata->phy_init) {
1082 retval = udc->pdata->phy_init(udc->phy_regs);
1083 if (retval) {
1084 dev_err(&udc->dev->dev,
1085 "init phy error %d\n", retval);
1086 udc_clock_disable(udc);
1087 return retval;
1088 }
1089 }
1090 udc->active = 1;
1091
1092 return 0;
1093}
1094
85ff7bfb 1095static int mv_udc_enable(struct mv_udc *udc)
1aec033b 1096{
85ff7bfb
NZ		 1097 if (udc->clock_gating)
1098 return mv_udc_enable_internal(udc);
1099
1100 return 0;
1101}
1102
1103static void mv_udc_disable_internal(struct mv_udc *udc)
1104{
1105 if (udc->active) {
1aec033b
NZ		 1106 dev_dbg(&udc->dev->dev, "disable udc\n");
1107 if (udc->pdata->phy_deinit)
1108 udc->pdata->phy_deinit(udc->phy_regs);
1109 udc_clock_disable(udc);
1110 udc->active = 0;
1111 }
1112}
1113
85ff7bfb
NZ		 1114static void mv_udc_disable(struct mv_udc *udc)
1115{
1116 if (udc->clock_gating)
1117 mv_udc_disable_internal(udc);
1118}
1119
e7cddda4 1120static int mv_udc_get_frame(struct usb_gadget *gadget)
1121{
1122 struct mv_udc *udc;
1123 u16 retval;
1124
1125 if (!gadget)
1126 return -ENODEV;
1127
1128 udc = container_of(gadget, struct mv_udc, gadget);
1129
86bb7028 1130 retval = readl(&udc->op_regs->frindex) & USB_FRINDEX_MASKS;
e7cddda4 1131
1132 return retval;
1133}
1134
1135/* Tries to wake up the host connected to this gadget */
1136static int mv_udc_wakeup(struct usb_gadget *gadget)
1137{
1138 struct mv_udc *udc = container_of(gadget, struct mv_udc, gadget);
1139 u32 portsc;
1140
1141 /* Remote wakeup feature not enabled by host */
1142 if (!udc->remote_wakeup)
1143 return -ENOTSUPP;
1144
1145 portsc = readl(&udc->op_regs->portsc);
1146 /* not suspended? */
1147 if (!(portsc & PORTSCX_PORT_SUSPEND))
1148 return 0;
1149 /* trigger force resume */
1150 portsc |= PORTSCX_PORT_FORCE_RESUME;
1151 writel(portsc, &udc->op_regs->portsc[0]);
1152 return 0;
1153}
1154
1aec033b
NZ		 1155static int mv_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1156{
1157 struct mv_udc *udc;
1158 unsigned long flags;
1159 int retval = 0;
1160
1161 udc = container_of(gadget, struct mv_udc, gadget);
1162 spin_lock_irqsave(&udc->lock, flags);
1163
2bcb7514
NZ		 1164 udc->vbus_active = (is_active != 0);
1165
1aec033b
NZ		 1166 dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n",
1167 __func__, udc->softconnect, udc->vbus_active);
1168
1aec033b
NZ		 1169 if (udc->driver && udc->softconnect && udc->vbus_active) {
1170 retval = mv_udc_enable(udc);
1171 if (retval == 0) {
1172 /* Clock is disabled, need re-init registers */
1173 udc_reset(udc);
1174 ep0_reset(udc);
1175 udc_start(udc);
1176 }
1177 } else if (udc->driver && udc->softconnect) {
11c37c8b
NZ		 1178 if (!udc->active)
1179 goto out;
1180
1aec033b
NZ		 1181 /* stop all the transfer in queue*/
1182 stop_activity(udc, udc->driver);
1183 udc_stop(udc);
1184 mv_udc_disable(udc);
1185 }
1186
11c37c8b 1187out:
1aec033b
NZ		 1188 spin_unlock_irqrestore(&udc->lock, flags);
1189 return retval;
1190}
1191
e7cddda4 1192static int mv_udc_pullup(struct usb_gadget *gadget, int is_on)
1193{
1194 struct mv_udc *udc;
1195 unsigned long flags;
1aec033b 1196 int retval = 0;
e7cddda4 1197
1198 udc = container_of(gadget, struct mv_udc, gadget);
1199 spin_lock_irqsave(&udc->lock, flags);
1200
2bcb7514
NZ		 1201 udc->softconnect = (is_on != 0);
1202
1aec033b
NZ		 1203 dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n",
1204 __func__, udc->softconnect, udc->vbus_active);
1205
1aec033b
NZ		 1206 if (udc->driver && udc->softconnect && udc->vbus_active) {
1207 retval = mv_udc_enable(udc);
1208 if (retval == 0) {
1209 /* Clock is disabled, need re-init registers */
1210 udc_reset(udc);
1211 ep0_reset(udc);
1212 udc_start(udc);
1213 }
1214 } else if (udc->driver && udc->vbus_active) {
1215 /* stop all the transfer in queue*/
1216 stop_activity(udc, udc->driver);
e7cddda4 1217 udc_stop(udc);
1aec033b
NZ		 1218 mv_udc_disable(udc);
1219 }
e7cddda4 1220
1221 spin_unlock_irqrestore(&udc->lock, flags);
1aec033b 1222 return retval;
e7cddda4 1223}
1224
aac16b63
CX		 1225static int mv_udc_start(struct usb_gadget *, struct usb_gadget_driver *);
1226static int mv_udc_stop(struct usb_gadget *, struct usb_gadget_driver *);
e7cddda4 1227/* device controller usb_gadget_ops structure */
1228static const struct usb_gadget_ops mv_ops = {
1229
1230 /* returns the current frame number */
1231 .get_frame = mv_udc_get_frame,
1232
1233 /* tries to wake up the host connected to this gadget */
1234 .wakeup = mv_udc_wakeup,
1235
1aec033b
NZ		 1236 /* notify controller that VBUS is powered or not */
1237 .vbus_session = mv_udc_vbus_session,
1238
e7cddda4 1239 /* D+ pullup, software-controlled connect/disconnect to USB host */
1240 .pullup = mv_udc_pullup,
aac16b63
CX		 1241 .udc_start = mv_udc_start,
1242 .udc_stop = mv_udc_stop,
e7cddda4 1243};
1244
e7cddda4 1245static int eps_init(struct mv_udc *udc)
1246{
1247 struct mv_ep *ep;
1248 char name[14];
1249 int i;
1250
1251 /* initialize ep0 */
1252 ep = &udc->eps[0];
1253 ep->udc = udc;
1254 strncpy(ep->name, "ep0", sizeof(ep->name));
1255 ep->ep.name = ep->name;
1256 ep->ep.ops = &mv_ep_ops;
1257 ep->wedge = 0;
1258 ep->stopped = 0;
e117e742 1259 usb_ep_set_maxpacket_limit(&ep->ep, EP0_MAX_PKT_SIZE);
e7cddda4 1260 ep->ep_num = 0;
b1371d16 1261 ep->ep.desc = &mv_ep0_desc;
e7cddda4 1262 INIT_LIST_HEAD(&ep->queue);
1263
1264 ep->ep_type = USB_ENDPOINT_XFER_CONTROL;
1265
1266 /* initialize other endpoints */
1267 for (i = 2; i < udc->max_eps * 2; i++) {
1268 ep = &udc->eps[i];
1269 if (i % 2) {
1270 snprintf(name, sizeof(name), "ep%din", i / 2);
1271 ep->direction = EP_DIR_IN;
1272 } else {
1273 snprintf(name, sizeof(name), "ep%dout", i / 2);
1274 ep->direction = EP_DIR_OUT;
1275 }
1276 ep->udc = udc;
1277 strncpy(ep->name, name, sizeof(ep->name));
1278 ep->ep.name = ep->name;
1279
1280 ep->ep.ops = &mv_ep_ops;
1281 ep->stopped = 0;
e117e742 1282 usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0);
e7cddda4 1283 ep->ep_num = i / 2;
1284
1285 INIT_LIST_HEAD(&ep->queue);
1286 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
1287
1288 ep->dqh = &udc->ep_dqh[i];
1289 }
1290
1291 return 0;
1292}
1293
1294/* delete all endpoint requests, called with spinlock held */
1295static void nuke(struct mv_ep *ep, int status)
1296{
1297 /* called with spinlock held */
1298 ep->stopped = 1;
1299
1300 /* endpoint fifo flush */
1301 mv_ep_fifo_flush(&ep->ep);
1302
1303 while (!list_empty(&ep->queue)) {
1304 struct mv_req *req = NULL;
1305 req = list_entry(ep->queue.next, struct mv_req, queue);
1306 done(ep, req, status);
1307 }
1308}
1309
1310/* stop all USB activities */
1311static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver)
1312{
1313 struct mv_ep *ep;
1314
1315 nuke(&udc->eps[0], -ESHUTDOWN);
1316
1317 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
1318 nuke(ep, -ESHUTDOWN);
1319 }
1320
1321 /* report disconnect; the driver is already quiesced */
1322 if (driver) {
1323 spin_unlock(&udc->lock);
1324 driver->disconnect(&udc->gadget);
1325 spin_lock(&udc->lock);
1326 }
1327}
1328
aac16b63
CX		 1329static int mv_udc_start(struct usb_gadget *gadget,
1330 struct usb_gadget_driver *driver)
e7cddda4 1331{
aac16b63 1332 struct mv_udc *udc;
e7cddda4 1333 int retval = 0;
1334 unsigned long flags;
1335
aac16b63 1336 udc = container_of(gadget, struct mv_udc, gadget);
e7cddda4 1337
1338 if (udc->driver)
1339 return -EBUSY;
1340
1341 spin_lock_irqsave(&udc->lock, flags);
1342
1343 /* hook up the driver ... */
1344 driver->driver.bus = NULL;
1345 udc->driver = driver;
e7cddda4 1346
1347 udc->usb_state = USB_STATE_ATTACHED;
1348 udc->ep0_state = WAIT_FOR_SETUP;
1aec033b 1349 udc->ep0_dir = EP_DIR_OUT;
e7cddda4 1350
1351 spin_unlock_irqrestore(&udc->lock, flags);
1352
449d04a9 1353 if (udc->transceiver) {
6e13c650
HK		 1354 retval = otg_set_peripheral(udc->transceiver->otg,
1355 &udc->gadget);
487d54d1
NZ		 1356 if (retval) {
1357 dev_err(&udc->dev->dev,
1358 "unable to register peripheral to otg\n");
aac16b63 1359 udc->driver = NULL;
487d54d1
NZ		 1360 return retval;
1361 }
1362 }
1363
1aec033b
NZ		 1364 /* pullup is always on */
1365 mv_udc_pullup(&udc->gadget, 1);
1366
1367 /* When boot with cable attached, there will be no vbus irq occurred */
1368 if (udc->qwork)
1369 queue_work(udc->qwork, &udc->vbus_work);
e7cddda4 1370
1371 return 0;
1372}
e7cddda4 1373
aac16b63
CX		 1374static int mv_udc_stop(struct usb_gadget *gadget,
1375 struct usb_gadget_driver *driver)
e7cddda4 1376{
aac16b63 1377 struct mv_udc *udc;
e7cddda4 1378 unsigned long flags;
1379
aac16b63 1380 udc = container_of(gadget, struct mv_udc, gadget);
e7cddda4 1381
e7cddda4 1382 spin_lock_irqsave(&udc->lock, flags);
1383
1aec033b
NZ		 1384 mv_udc_enable(udc);
1385 udc_stop(udc);
1386
e7cddda4 1387 /* stop all usb activities */
1388 udc->gadget.speed = USB_SPEED_UNKNOWN;
1389 stop_activity(udc, driver);
1aec033b
NZ		 1390 mv_udc_disable(udc);
1391
e7cddda4 1392 spin_unlock_irqrestore(&udc->lock, flags);
1393
1394 /* unbind gadget driver */
e7cddda4 1395 udc->driver = NULL;
1396
1397 return 0;
1398}
e7cddda4 1399
fb22cbac
NZ		 1400static void mv_set_ptc(struct mv_udc *udc, u32 mode)
1401{
1402 u32 portsc;
1403
1404 portsc = readl(&udc->op_regs->portsc[0]);
1405 portsc |= mode << 16;
1406 writel(portsc, &udc->op_regs->portsc[0]);
1407}
1408
1409static void prime_status_complete(struct usb_ep *ep, struct usb_request *_req)
1410{
aac16b63 1411 struct mv_ep *mvep = container_of(ep, struct mv_ep, ep);
fb22cbac 1412 struct mv_req *req = container_of(_req, struct mv_req, req);
aac16b63 1413 struct mv_udc *udc;
fb22cbac
NZ		 1414 unsigned long flags;
1415
aac16b63
CX		 1416 udc = mvep->udc;
1417
fb22cbac
NZ		 1418 dev_info(&udc->dev->dev, "switch to test mode %d\n", req->test_mode);
1419
1420 spin_lock_irqsave(&udc->lock, flags);
1421 if (req->test_mode) {
1422 mv_set_ptc(udc, req->test_mode);
1423 req->test_mode = 0;
1424 }
1425 spin_unlock_irqrestore(&udc->lock, flags);
1426}
1427
e7cddda4 1428static int
1429udc_prime_status(struct mv_udc *udc, u8 direction, u16 status, bool empty)
1430{
1431 int retval = 0;
1432 struct mv_req *req;
1433 struct mv_ep *ep;
1434
1435 ep = &udc->eps[0];
1436 udc->ep0_dir = direction;
36616224 1437 udc->ep0_state = WAIT_FOR_OUT_STATUS;
e7cddda4 1438
1439 req = udc->status_req;
1440
1441 /* fill in the reqest structure */
1442 if (empty == false) {
1443 *((u16 *) req->req.buf) = cpu_to_le16(status);
1444 req->req.length = 2;
1445 } else
1446 req->req.length = 0;
1447
1448 req->ep = ep;
1449 req->req.status = -EINPROGRESS;
1450 req->req.actual = 0;
fb22cbac
NZ		 1451 if (udc->test_mode) {
1452 req->req.complete = prime_status_complete;
1453 req->test_mode = udc->test_mode;
1454 udc->test_mode = 0;
1455 } else
1456 req->req.complete = NULL;
e7cddda4 1457 req->dtd_count = 0;
1458
46e172df
NZ		 1459 if (req->req.dma == DMA_ADDR_INVALID) {
1460 req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
1461 req->req.buf, req->req.length,
1462 ep_dir(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1463 req->mapped = 1;
1464 }
1465
e7cddda4 1466 /* prime the data phase */
0344606b 1467 if (!req_to_dtd(req)) {
e7cddda4 1468 retval = queue_dtd(ep, req);
0344606b
NZ		 1469 if (retval) {
1470 dev_err(&udc->dev->dev,
1471 "Failed to queue dtd when prime status\n");
1472 goto out;
1473 }
1474 } else{ /* no mem */
e7cddda4 1475 retval = -ENOMEM;
0344606b
NZ		 1476 dev_err(&udc->dev->dev,
1477 "Failed to dma_pool_alloc when prime status\n");
e7cddda4 1478 goto out;
1479 }
1480
1481 list_add_tail(&req->queue, &ep->queue);
1482
1483 return 0;
1484out:
4c0c6d00 1485 usb_gadget_unmap_request(&udc->gadget, &req->req, ep_dir(ep));
0344606b 1486
e7cddda4 1487 return retval;
1488}
1489
fb22cbac
NZ		 1490static void mv_udc_testmode(struct mv_udc *udc, u16 index)
1491{
1492 if (index <= TEST_FORCE_EN) {
1493 udc->test_mode = index;
1494 if (udc_prime_status(udc, EP_DIR_IN, 0, true))
1495 ep0_stall(udc);
1496 } else
1497 dev_err(&udc->dev->dev,
1498 "This test mode(%d) is not supported\n", index);
1499}
1500
e7cddda4 1501static void ch9setaddress(struct mv_udc *udc, struct usb_ctrlrequest *setup)
1502{
1503 udc->dev_addr = (u8)setup->wValue;
1504
1505 /* update usb state */
1506 udc->usb_state = USB_STATE_ADDRESS;
1507
1508 if (udc_prime_status(udc, EP_DIR_IN, 0, true))
1509 ep0_stall(udc);
1510}
1511
1512static void ch9getstatus(struct mv_udc *udc, u8 ep_num,
1513 struct usb_ctrlrequest *setup)
1514{
431879a7 1515 u16 status = 0;
e7cddda4 1516 int retval;
1517
1518 if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
1519 != (USB_DIR_IN | USB_TYPE_STANDARD))
1520 return;
1521
1522 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1523 status = 1 << USB_DEVICE_SELF_POWERED;
1524 status |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
1525 } else if ((setup->bRequestType & USB_RECIP_MASK)
1526 == USB_RECIP_INTERFACE) {
1527 /* get interface status */
1528 status = 0;
1529 } else if ((setup->bRequestType & USB_RECIP_MASK)
1530 == USB_RECIP_ENDPOINT) {
1531 u8 ep_num, direction;
1532
1533 ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK;
1534 direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK)
1535 ? EP_DIR_IN : EP_DIR_OUT;
1536 status = ep_is_stall(udc, ep_num, direction)
1537 << USB_ENDPOINT_HALT;
1538 }
1539
1540 retval = udc_prime_status(udc, EP_DIR_IN, status, false);
1541 if (retval)
1542 ep0_stall(udc);
36616224
NZ		 1543 else
1544 udc->ep0_state = DATA_STATE_XMIT;
e7cddda4 1545}
1546
1547static void ch9clearfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup)
1548{
1549 u8 ep_num;
1550 u8 direction;
1551 struct mv_ep *ep;
1552
1553 if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK))
1554 == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) {
1555 switch (setup->wValue) {
1556 case USB_DEVICE_REMOTE_WAKEUP:
1557 udc->remote_wakeup = 0;
1558 break;
e7cddda4 1559 default:
1560 goto out;
1561 }
1562 } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK))
1563 == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) {
1564 switch (setup->wValue) {
1565 case USB_ENDPOINT_HALT:
1566 ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK;
1567 direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK)
1568 ? EP_DIR_IN : EP_DIR_OUT;
1569 if (setup->wValue != 0 || setup->wLength != 0
1570 || ep_num > udc->max_eps)
1571 goto out;
1572 ep = &udc->eps[ep_num * 2 + direction];
1573 if (ep->wedge == 1)
1574 break;
1575 spin_unlock(&udc->lock);
1576 ep_set_stall(udc, ep_num, direction, 0);
1577 spin_lock(&udc->lock);
1578 break;
1579 default:
1580 goto out;
1581 }
1582 } else
1583 goto out;
1584
1585 if (udc_prime_status(udc, EP_DIR_IN, 0, true))
1586 ep0_stall(udc);
e7cddda4 1587out:
1588 return;
1589}
1590
1591static void ch9setfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup)
1592{
1593 u8 ep_num;
1594 u8 direction;
1595
1596 if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK))
1597 == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) {
1598 switch (setup->wValue) {
1599 case USB_DEVICE_REMOTE_WAKEUP:
1600 udc->remote_wakeup = 1;
1601 break;
1602 case USB_DEVICE_TEST_MODE:
1603 if (setup->wIndex & 0xFF
fb22cbac
NZ		 1604 || udc->gadget.speed != USB_SPEED_HIGH)
1605 ep0_stall(udc);
1606
1607 if (udc->usb_state != USB_STATE_CONFIGURED
1608 && udc->usb_state != USB_STATE_ADDRESS
1609 && udc->usb_state != USB_STATE_DEFAULT)
1610 ep0_stall(udc);
1611
1612 mv_udc_testmode(udc, (setup->wIndex >> 8));
1613 goto out;
e7cddda4 1614 default:
1615 goto out;
1616 }
1617 } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK))
1618 == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) {
1619 switch (setup->wValue) {
1620 case USB_ENDPOINT_HALT:
1621 ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK;
1622 direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK)
1623 ? EP_DIR_IN : EP_DIR_OUT;
1624 if (setup->wValue != 0 || setup->wLength != 0
1625 || ep_num > udc->max_eps)
1626 goto out;
1627 spin_unlock(&udc->lock);
1628 ep_set_stall(udc, ep_num, direction, 1);
1629 spin_lock(&udc->lock);
1630 break;
1631 default:
1632 goto out;
1633 }
1634 } else
1635 goto out;
1636
1637 if (udc_prime_status(udc, EP_DIR_IN, 0, true))
1638 ep0_stall(udc);
1639out:
1640 return;
1641}
1642
1643static void handle_setup_packet(struct mv_udc *udc, u8 ep_num,
1644 struct usb_ctrlrequest *setup)
94a06018
FB		 1645 __releases(&ep->udc->lock)
1646 __acquires(&ep->udc->lock)
e7cddda4 1647{
1648 bool delegate = false;
1649
1650 nuke(&udc->eps[ep_num * 2 + EP_DIR_OUT], -ESHUTDOWN);
1651
1652 dev_dbg(&udc->dev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n",
1653 setup->bRequestType, setup->bRequest,
1654 setup->wValue, setup->wIndex, setup->wLength);
f6d9d89f 1655 /* We process some standard setup requests here */
e7cddda4 1656 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1657 switch (setup->bRequest) {
1658 case USB_REQ_GET_STATUS:
1659 ch9getstatus(udc, ep_num, setup);
1660 break;
1661
1662 case USB_REQ_SET_ADDRESS:
1663 ch9setaddress(udc, setup);
1664 break;
1665
1666 case USB_REQ_CLEAR_FEATURE:
1667 ch9clearfeature(udc, setup);
1668 break;
1669
1670 case USB_REQ_SET_FEATURE:
1671 ch9setfeature(udc, setup);
1672 break;
1673
1674 default:
1675 delegate = true;
1676 }
1677 } else
1678 delegate = true;
1679
1680 /* delegate USB standard requests to the gadget driver */
1681 if (delegate == true) {
1682 /* USB requests handled by gadget */
1683 if (setup->wLength) {
1684 /* DATA phase from gadget, STATUS phase from udc */
1685 udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
1686 ? EP_DIR_IN : EP_DIR_OUT;
1687 spin_unlock(&udc->lock);
1688 if (udc->driver->setup(&udc->gadget,
1689 &udc->local_setup_buff) < 0)
1690 ep0_stall(udc);
1691 spin_lock(&udc->lock);
1692 udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
1693 ? DATA_STATE_XMIT : DATA_STATE_RECV;
1694 } else {
1695 /* no DATA phase, IN STATUS phase from gadget */
1696 udc->ep0_dir = EP_DIR_IN;
1697 spin_unlock(&udc->lock);
1698 if (udc->driver->setup(&udc->gadget,
1699 &udc->local_setup_buff) < 0)
1700 ep0_stall(udc);
1701 spin_lock(&udc->lock);
1702 udc->ep0_state = WAIT_FOR_OUT_STATUS;
1703 }
1704 }
1705}
1706
1707/* complete DATA or STATUS phase of ep0 prime status phase if needed */
1708static void ep0_req_complete(struct mv_udc *udc,
1709 struct mv_ep *ep0, struct mv_req *req)
1710{
1711 u32 new_addr;
1712
1713 if (udc->usb_state == USB_STATE_ADDRESS) {
1714 /* set the new address */
1715 new_addr = (u32)udc->dev_addr;
1716 writel(new_addr << USB_DEVICE_ADDRESS_BIT_SHIFT,
1717 &udc->op_regs->deviceaddr);
1718 }
1719
1720 done(ep0, req, 0);
1721
1722 switch (udc->ep0_state) {
1723 case DATA_STATE_XMIT:
1724 /* receive status phase */
1725 if (udc_prime_status(udc, EP_DIR_OUT, 0, true))
1726 ep0_stall(udc);
1727 break;
1728 case DATA_STATE_RECV:
1729 /* send status phase */
1730 if (udc_prime_status(udc, EP_DIR_IN, 0 , true))
1731 ep0_stall(udc);
1732 break;
1733 case WAIT_FOR_OUT_STATUS:
1734 udc->ep0_state = WAIT_FOR_SETUP;
1735 break;
1736 case WAIT_FOR_SETUP:
1737 dev_err(&udc->dev->dev, "unexpect ep0 packets\n");
1738 break;
1739 default:
1740 ep0_stall(udc);
1741 break;
1742 }
1743}
1744
1745static void get_setup_data(struct mv_udc *udc, u8 ep_num, u8 *buffer_ptr)
1746{
1747 u32 temp;
1748 struct mv_dqh *dqh;
1749
1750 dqh = &udc->ep_dqh[ep_num * 2 + EP_DIR_OUT];
1751
1752 /* Clear bit in ENDPTSETUPSTAT */
96c2bbb0 1753 writel((1 << ep_num), &udc->op_regs->epsetupstat);
e7cddda4 1754
1755 /* while a hazard exists when setup package arrives */
1756 do {
1757 /* Set Setup Tripwire */
1758 temp = readl(&udc->op_regs->usbcmd);
1759 writel(temp | USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd);
1760
1761 /* Copy the setup packet to local buffer */
1762 memcpy(buffer_ptr, (u8 *) dqh->setup_buffer, 8);
1763 } while (!(readl(&udc->op_regs->usbcmd) & USBCMD_SETUP_TRIPWIRE_SET));
1764
1765 /* Clear Setup Tripwire */
1766 temp = readl(&udc->op_regs->usbcmd);
1767 writel(temp & ~USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd);
1768}
1769
1770static void irq_process_tr_complete(struct mv_udc *udc)
1771{
1772 u32 tmp, bit_pos;
1773 int i, ep_num = 0, direction = 0;
1774 struct mv_ep *curr_ep;
1775 struct mv_req *curr_req, *temp_req;
1776 int status;
1777
1778 /*
1779 * We use separate loops for ENDPTSETUPSTAT and ENDPTCOMPLETE
1780 * because the setup packets are to be read ASAP
1781 */
1782
1783 /* Process all Setup packet received interrupts */
1784 tmp = readl(&udc->op_regs->epsetupstat);
1785
1786 if (tmp) {
1787 for (i = 0; i < udc->max_eps; i++) {
1788 if (tmp & (1 << i)) {
1789 get_setup_data(udc, i,
1790 (u8 *)(&udc->local_setup_buff));
1791 handle_setup_packet(udc, i,
1792 &udc->local_setup_buff);
1793 }
1794 }
1795 }
1796
1797 /* Don't clear the endpoint setup status register here.
1798 * It is cleared as a setup packet is read out of the buffer
1799 */
1800
1801 /* Process non-setup transaction complete interrupts */
1802 tmp = readl(&udc->op_regs->epcomplete);
1803
1804 if (!tmp)
1805 return;
1806
1807 writel(tmp, &udc->op_regs->epcomplete);
1808
1809 for (i = 0; i < udc->max_eps * 2; i++) {
1810 ep_num = i >> 1;
1811 direction = i % 2;
1812
1813 bit_pos = 1 << (ep_num + 16 * direction);
1814
1815 if (!(bit_pos & tmp))
1816 continue;
1817
1818 if (i == 1)
1819 curr_ep = &udc->eps[0];
1820 else
1821 curr_ep = &udc->eps[i];
1822 /* process the req queue until an uncomplete request */
1823 list_for_each_entry_safe(curr_req, temp_req,
1824 &curr_ep->queue, queue) {
1825 status = process_ep_req(udc, i, curr_req);
1826 if (status)
1827 break;
1828
1829 /* write back status to req */
1830 curr_req->req.status = status;
1831
1832 /* ep0 request completion */
1833 if (ep_num == 0) {
1834 ep0_req_complete(udc, curr_ep, curr_req);
1835 break;
1836 } else {
1837 done(curr_ep, curr_req, status);
1838 }
1839 }
1840 }
1841}
1842
94a06018 1843static void irq_process_reset(struct mv_udc *udc)
e7cddda4 1844{
1845 u32 tmp;
1846 unsigned int loops;
1847
1848 udc->ep0_dir = EP_DIR_OUT;
1849 udc->ep0_state = WAIT_FOR_SETUP;
1850 udc->remote_wakeup = 0; /* default to 0 on reset */
1851
1852 /* The address bits are past bit 25-31. Set the address */
1853 tmp = readl(&udc->op_regs->deviceaddr);
1854 tmp &= ~(USB_DEVICE_ADDRESS_MASK);
1855 writel(tmp, &udc->op_regs->deviceaddr);
1856
1857 /* Clear all the setup token semaphores */
1858 tmp = readl(&udc->op_regs->epsetupstat);
1859 writel(tmp, &udc->op_regs->epsetupstat);
1860
1861 /* Clear all the endpoint complete status bits */
1862 tmp = readl(&udc->op_regs->epcomplete);
1863 writel(tmp, &udc->op_regs->epcomplete);
1864
1865 /* wait until all endptprime bits cleared */
1866 loops = LOOPS(PRIME_TIMEOUT);
1867 while (readl(&udc->op_regs->epprime) & 0xFFFFFFFF) {
1868 if (loops == 0) {
1869 dev_err(&udc->dev->dev,
1870 "Timeout for ENDPTPRIME = 0x%x\n",
1871 readl(&udc->op_regs->epprime));
1872 break;
1873 }
1874 loops--;
1875 udelay(LOOPS_USEC);
1876 }
1877
1878 /* Write 1s to the Flush register */
1879 writel((u32)~0, &udc->op_regs->epflush);
1880
1881 if (readl(&udc->op_regs->portsc[0]) & PORTSCX_PORT_RESET) {
1882 dev_info(&udc->dev->dev, "usb bus reset\n");
1883 udc->usb_state = USB_STATE_DEFAULT;
1884 /* reset all the queues, stop all USB activities */
1885 stop_activity(udc, udc->driver);
1886 } else {
1887 dev_info(&udc->dev->dev, "USB reset portsc 0x%x\n",
1888 readl(&udc->op_regs->portsc));
1889
1890 /*
1891 * re-initialize
1892 * controller reset
1893 */
1894 udc_reset(udc);
1895
1896 /* reset all the queues, stop all USB activities */
1897 stop_activity(udc, udc->driver);
1898
1899 /* reset ep0 dQH and endptctrl */
1900 ep0_reset(udc);
1901
1902 /* enable interrupt and set controller to run state */
1903 udc_start(udc);
1904
1905 udc->usb_state = USB_STATE_ATTACHED;
1906 }
1907}
1908
1909static void handle_bus_resume(struct mv_udc *udc)
1910{
1911 udc->usb_state = udc->resume_state;
1912 udc->resume_state = 0;
1913
1914 /* report resume to the driver */
1915 if (udc->driver) {
1916 if (udc->driver->resume) {
1917 spin_unlock(&udc->lock);
1918 udc->driver->resume(&udc->gadget);
1919 spin_lock(&udc->lock);
1920 }
1921 }
1922}
1923
1924static void irq_process_suspend(struct mv_udc *udc)
1925{
1926 udc->resume_state = udc->usb_state;
1927 udc->usb_state = USB_STATE_SUSPENDED;
1928
1929 if (udc->driver->suspend) {
1930 spin_unlock(&udc->lock);
1931 udc->driver->suspend(&udc->gadget);
1932 spin_lock(&udc->lock);
1933 }
1934}
1935
1936static void irq_process_port_change(struct mv_udc *udc)
1937{
1938 u32 portsc;
1939
1940 portsc = readl(&udc->op_regs->portsc[0]);
1941 if (!(portsc & PORTSCX_PORT_RESET)) {
1942 /* Get the speed */
1943 u32 speed = portsc & PORTSCX_PORT_SPEED_MASK;
1944 switch (speed) {
1945 case PORTSCX_PORT_SPEED_HIGH:
1946 udc->gadget.speed = USB_SPEED_HIGH;
1947 break;
1948 case PORTSCX_PORT_SPEED_FULL:
1949 udc->gadget.speed = USB_SPEED_FULL;
1950 break;
1951 case PORTSCX_PORT_SPEED_LOW:
1952 udc->gadget.speed = USB_SPEED_LOW;
1953 break;
1954 default:
1955 udc->gadget.speed = USB_SPEED_UNKNOWN;
1956 break;
1957 }
1958 }
1959
1960 if (portsc & PORTSCX_PORT_SUSPEND) {
1961 udc->resume_state = udc->usb_state;
1962 udc->usb_state = USB_STATE_SUSPENDED;
1963 if (udc->driver->suspend) {
1964 spin_unlock(&udc->lock);
1965 udc->driver->suspend(&udc->gadget);
1966 spin_lock(&udc->lock);
1967 }
1968 }
1969
1970 if (!(portsc & PORTSCX_PORT_SUSPEND)
1971 && udc->usb_state == USB_STATE_SUSPENDED) {
1972 handle_bus_resume(udc);
1973 }
1974
1975 if (!udc->resume_state)
1976 udc->usb_state = USB_STATE_DEFAULT;
1977}
1978
1979static void irq_process_error(struct mv_udc *udc)
1980{
1981 /* Increment the error count */
1982 udc->errors++;
1983}
1984
1985static irqreturn_t mv_udc_irq(int irq, void *dev)
1986{
1987 struct mv_udc *udc = (struct mv_udc *)dev;
1988 u32 status, intr;
1989
309d6d2b
NZ		 1990 /* Disable ISR when stopped bit is set */
1991 if (udc->stopped)
1992 return IRQ_NONE;
1993
e7cddda4 1994 spin_lock(&udc->lock);
1995
1996 status = readl(&udc->op_regs->usbsts);
1997 intr = readl(&udc->op_regs->usbintr);
1998 status &= intr;
1999
2000 if (status == 0) {
2001 spin_unlock(&udc->lock);
2002 return IRQ_NONE;
2003 }
2004
25985edc 2005 /* Clear all the interrupts occurred */
e7cddda4 2006 writel(status, &udc->op_regs->usbsts);
2007
2008 if (status & USBSTS_ERR)
2009 irq_process_error(udc);
2010
2011 if (status & USBSTS_RESET)
2012 irq_process_reset(udc);
2013
2014 if (status & USBSTS_PORT_CHANGE)
2015 irq_process_port_change(udc);
2016
2017 if (status & USBSTS_INT)
2018 irq_process_tr_complete(udc);
2019
2020 if (status & USBSTS_SUSPEND)
2021 irq_process_suspend(udc);
2022
2023 spin_unlock(&udc->lock);
2024
2025 return IRQ_HANDLED;
2026}
2027
1aec033b
NZ		 2028static irqreturn_t mv_udc_vbus_irq(int irq, void *dev)
2029{
2030 struct mv_udc *udc = (struct mv_udc *)dev;
2031
2032 /* polling VBUS and init phy may cause too much time*/
2033 if (udc->qwork)
2034 queue_work(udc->qwork, &udc->vbus_work);
2035
2036 return IRQ_HANDLED;
2037}
2038
2039static void mv_udc_vbus_work(struct work_struct *work)
2040{
2041 struct mv_udc *udc;
2042 unsigned int vbus;
2043
2044 udc = container_of(work, struct mv_udc, vbus_work);
2045 if (!udc->pdata->vbus)
2046 return;
2047
2048 vbus = udc->pdata->vbus->poll();
2049 dev_info(&udc->dev->dev, "vbus is %d\n", vbus);
2050
2051 if (vbus == VBUS_HIGH)
2052 mv_udc_vbus_session(&udc->gadget, 1);
2053 else if (vbus == VBUS_LOW)
2054 mv_udc_vbus_session(&udc->gadget, 0);
2055}
2056
e7cddda4 2057/* release device structure */
2058static void gadget_release(struct device *_dev)
2059{
aac16b63
CX		 2060 struct mv_udc *udc;
2061
2062 udc = dev_get_drvdata(_dev);
e7cddda4 2063
2064 complete(udc->done);
e7cddda4 2065}
2066
3517c31a 2067static int mv_udc_remove(struct platform_device *pdev)
e7cddda4 2068{
aac16b63 2069 struct mv_udc *udc;
e7cddda4 2070
3517c31a 2071 udc = platform_get_drvdata(pdev);
e7cddda4 2072
0f91349b
SAS		 2073 usb_del_gadget_udc(&udc->gadget);
2074
1aec033b
NZ		 2075 if (udc->qwork) {
2076 flush_workqueue(udc->qwork);
2077 destroy_workqueue(udc->qwork);
2078 }
2079
e7cddda4 2080 /* free memory allocated in probe */
2081 if (udc->dtd_pool)
2082 dma_pool_destroy(udc->dtd_pool);
2083
2084 if (udc->ep_dqh)
3517c31a 2085 dma_free_coherent(&pdev->dev, udc->ep_dqh_size,
e7cddda4 2086 udc->ep_dqh, udc->ep_dqh_dma);
2087
1aec033b
NZ		 2088 mv_udc_disable(udc);
2089
e7cddda4 2090 /* free dev, wait for the release() finished */
dde34cc5 2091 wait_for_completion(udc->done);
e7cddda4 2092
2093 return 0;
2094}
2095
3517c31a 2096static int mv_udc_probe(struct platform_device *pdev)
e7cddda4 2097{
e01ee9f5 2098 struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
e7cddda4 2099 struct mv_udc *udc;
2100 int retval = 0;
2101 struct resource *r;
2102 size_t size;
2103
dde34cc5 2104 if (pdata == NULL) {
3517c31a 2105 dev_err(&pdev->dev, "missing platform_data\n");
dde34cc5
NZ		 2106 return -ENODEV;
2107 }
2108
1919811f 2109 udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);
d6163f2c 2110 if (udc == NULL)
dde34cc5 2111 return -ENOMEM;
e7cddda4 2112
dde34cc5 2113 udc->done = &release_done;
e01ee9f5 2114 udc->pdata = dev_get_platdata(&pdev->dev);
e7cddda4 2115 spin_lock_init(&udc->lock);
2116
3517c31a 2117 udc->dev = pdev;
e7cddda4 2118
449d04a9 2119 if (pdata->mode == MV_USB_MODE_OTG) {
3517c31a
CX		 2120 udc->transceiver = devm_usb_get_phy(&pdev->dev,
2121 USB_PHY_TYPE_USB2);
4dbb7161
FB		 2122 if (IS_ERR(udc->transceiver)) {
2123 retval = PTR_ERR(udc->transceiver);
2124
2125 if (retval == -ENXIO)
2126 return retval;
2127
449d04a9 2128 udc->transceiver = NULL;
4dbb7161 2129 return -EPROBE_DEFER;
449d04a9
CX		 2130 }
2131 }
487d54d1 2132
1919811f
CX		 2133 /* udc only have one sysclk. */
2134 udc->clk = devm_clk_get(&pdev->dev, NULL);
2135 if (IS_ERR(udc->clk))
2136 return PTR_ERR(udc->clk);
e7cddda4 2137
dde34cc5 2138 r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "capregs");
e7cddda4 2139 if (r == NULL) {
3517c31a
CX		 2140 dev_err(&pdev->dev, "no I/O memory resource defined\n");
2141 return -ENODEV;
e7cddda4 2142 }
2143
2144 udc->cap_regs = (struct mv_cap_regs __iomem *)
3517c31a 2145 devm_ioremap(&pdev->dev, r->start, resource_size(r));
e7cddda4 2146 if (udc->cap_regs == NULL) {
3517c31a
CX		 2147 dev_err(&pdev->dev, "failed to map I/O memory\n");
2148 return -EBUSY;
e7cddda4 2149 }
2150
dde34cc5 2151 r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "phyregs");
e7cddda4 2152 if (r == NULL) {
3517c31a
CX		 2153 dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
2154 return -ENODEV;
e7cddda4 2155 }
2156
5e6c86b0
NZ		 2157 udc->phy_regs = ioremap(r->start, resource_size(r));
2158 if (udc->phy_regs == NULL) {
3517c31a
CX		 2159 dev_err(&pdev->dev, "failed to map phy I/O memory\n");
2160 return -EBUSY;
e7cddda4 2161 }
2162
2163 /* we will acces controller register, so enable the clk */
85ff7bfb
NZ		 2164 retval = mv_udc_enable_internal(udc);
2165 if (retval)
3517c31a 2166 return retval;
e7cddda4 2167
5e6c86b0
NZ		 2168 udc->op_regs =
2169 (struct mv_op_regs __iomem *)((unsigned long)udc->cap_regs
e7cddda4 2170 + (readl(&udc->cap_regs->caplength_hciversion)
2171 & CAPLENGTH_MASK));
2172 udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK;
2173
4540a9ab
NZ		 2174 /*
2175 * some platform will use usb to download image, it may not disconnect
2176 * usb gadget before loading kernel. So first stop udc here.
2177 */
2178 udc_stop(udc);
2179 writel(0xFFFFFFFF, &udc->op_regs->usbsts);
2180
e7cddda4 2181 size = udc->max_eps * sizeof(struct mv_dqh) *2;
2182 size = (size + DQH_ALIGNMENT - 1) & ~(DQH_ALIGNMENT - 1);
3517c31a 2183 udc->ep_dqh = dma_alloc_coherent(&pdev->dev, size,
e7cddda4 2184 &udc->ep_dqh_dma, GFP_KERNEL);
2185
2186 if (udc->ep_dqh == NULL) {
3517c31a 2187 dev_err(&pdev->dev, "allocate dQH memory failed\n");
e7cddda4 2188 retval = -ENOMEM;
dde34cc5 2189 goto err_disable_clock;
e7cddda4 2190 }
2191 udc->ep_dqh_size = size;
2192
2193 /* create dTD dma_pool resource */
2194 udc->dtd_pool = dma_pool_create("mv_dtd",
3517c31a 2195 &pdev->dev,
e7cddda4 2196 sizeof(struct mv_dtd),
2197 DTD_ALIGNMENT,
2198 DMA_BOUNDARY);
2199
2200 if (!udc->dtd_pool) {
2201 retval = -ENOMEM;
dde34cc5 2202 goto err_free_dma;
e7cddda4 2203 }
2204
2205 size = udc->max_eps * sizeof(struct mv_ep) *2;
3517c31a 2206 udc->eps = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
e7cddda4 2207 if (udc->eps == NULL) {
e7cddda4 2208 retval = -ENOMEM;
dde34cc5 2209 goto err_destroy_dma;
e7cddda4 2210 }
2211
2212 /* initialize ep0 status request structure */
3517c31a
CX		 2213 udc->status_req = devm_kzalloc(&pdev->dev, sizeof(struct mv_req),
2214 GFP_KERNEL);
e7cddda4 2215 if (!udc->status_req) {
e7cddda4 2216 retval = -ENOMEM;
3517c31a 2217 goto err_destroy_dma;
e7cddda4 2218 }
2219 INIT_LIST_HEAD(&udc->status_req->queue);
2220
2221 /* allocate a small amount of memory to get valid address */
2222 udc->status_req->req.buf = kzalloc(8, GFP_KERNEL);
46e172df 2223 udc->status_req->req.dma = DMA_ADDR_INVALID;
e7cddda4 2224
2225 udc->resume_state = USB_STATE_NOTATTACHED;
2226 udc->usb_state = USB_STATE_POWERED;
2227 udc->ep0_dir = EP_DIR_OUT;
2228 udc->remote_wakeup = 0;
2229
2230 r = platform_get_resource(udc->dev, IORESOURCE_IRQ, 0);
2231 if (r == NULL) {
3517c31a 2232 dev_err(&pdev->dev, "no IRQ resource defined\n");
e7cddda4 2233 retval = -ENODEV;
3517c31a 2234 goto err_destroy_dma;
e7cddda4 2235 }
2236 udc->irq = r->start;
3517c31a 2237 if (devm_request_irq(&pdev->dev, udc->irq, mv_udc_irq,
b5dd18d8 2238 IRQF_SHARED, driver_name, udc)) {
3517c31a 2239 dev_err(&pdev->dev, "Request irq %d for UDC failed\n",
e7cddda4 2240 udc->irq);
2241 retval = -ENODEV;
3517c31a 2242 goto err_destroy_dma;
e7cddda4 2243 }
2244
2245 /* initialize gadget structure */
2246 udc->gadget.ops = &mv_ops; /* usb_gadget_ops */
2247 udc->gadget.ep0 = &udc->eps[0].ep; /* gadget ep0 */
2248 INIT_LIST_HEAD(&udc->gadget.ep_list); /* ep_list */
2249 udc->gadget.speed = USB_SPEED_UNKNOWN; /* speed */
d327ab5b 2250 udc->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */
e7cddda4 2251
2252 /* the "gadget" abstracts/virtualizes the controller */
e7cddda4 2253 udc->gadget.name = driver_name; /* gadget name */
e7cddda4 2254
2255 eps_init(udc);
2256
1aec033b 2257 /* VBUS detect: we can disable/enable clock on demand.*/
449d04a9 2258 if (udc->transceiver)
487d54d1
NZ		 2259 udc->clock_gating = 1;
2260 else if (pdata->vbus) {
1aec033b 2261 udc->clock_gating = 1;
3517c31a
CX		 2262 retval = devm_request_threaded_irq(&pdev->dev,
2263 pdata->vbus->irq, NULL,
1aec033b
NZ		 2264 mv_udc_vbus_irq, IRQF_ONESHOT, "vbus", udc);
2265 if (retval) {
3517c31a 2266 dev_info(&pdev->dev,
1aec033b
NZ		 2267 "Can not request irq for VBUS, "
2268 "disable clock gating\n");
2269 udc->clock_gating = 0;
2270 }
2271
2272 udc->qwork = create_singlethread_workqueue("mv_udc_queue");
2273 if (!udc->qwork) {
3517c31a 2274 dev_err(&pdev->dev, "cannot create workqueue\n");
1aec033b 2275 retval = -ENOMEM;
5dc7b773 2276 goto err_destroy_dma;
1aec033b
NZ		 2277 }
2278
2279 INIT_WORK(&udc->vbus_work, mv_udc_vbus_work);
2280 }
2281
2282 /*
2283 * When clock gating is supported, we can disable clk and phy.
2284 * If not, it means that VBUS detection is not supported, we
2285 * have to enable vbus active all the time to let controller work.
2286 */
85ff7bfb
NZ		 2287 if (udc->clock_gating)
2288 mv_udc_disable_internal(udc);
2289 else
1aec033b 2290 udc->vbus_active = 1;
e7cddda4 2291
e861c768
FB		 2292 retval = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
2293 gadget_release);
dde34cc5 2294 if (retval)
3517c31a 2295 goto err_create_workqueue;
dde34cc5 2296
3517c31a
CX		 2297 platform_set_drvdata(pdev, udc);
2298 dev_info(&pdev->dev, "successful probe UDC device %s clock gating.\n",
1aec033b
NZ		 2299 udc->clock_gating ? "with" : "without");
2300
dde34cc5
NZ		 2301 return 0;
2302
3517c31a
CX		 2303err_create_workqueue:
2304 destroy_workqueue(udc->qwork);
dde34cc5
NZ		 2305err_destroy_dma:
2306 dma_pool_destroy(udc->dtd_pool);
2307err_free_dma:
3517c31a 2308 dma_free_coherent(&pdev->dev, udc->ep_dqh_size,
dde34cc5
NZ		 2309 udc->ep_dqh, udc->ep_dqh_dma);
2310err_disable_clock:
85ff7bfb 2311 mv_udc_disable_internal(udc);
3517c31a 2312
e7cddda4 2313 return retval;
2314}
2315
2316#ifdef CONFIG_PM
aac16b63 2317static int mv_udc_suspend(struct device *dev)
e7cddda4 2318{
aac16b63
CX		 2319 struct mv_udc *udc;
2320
2321 udc = dev_get_drvdata(dev);
e7cddda4 2322
5076ae55 2323 /* if OTG is enabled, the following will be done in OTG driver*/
449d04a9 2324 if (udc->transceiver)
5076ae55
NZ		 2325 return 0;
2326
2327 if (udc->pdata->vbus && udc->pdata->vbus->poll)
2328 if (udc->pdata->vbus->poll() == VBUS_HIGH) {
2329 dev_info(&udc->dev->dev, "USB cable is connected!\n");
2330 return -EAGAIN;
2331 }
2332
2333 /*
2334 * only cable is unplugged, udc can suspend.
2335 * So do not care about clock_gating == 1.
2336 */
2337 if (!udc->clock_gating) {
2338 udc_stop(udc);
2339
2340 spin_lock_irq(&udc->lock);
2341 /* stop all usb activities */
2342 stop_activity(udc, udc->driver);
2343 spin_unlock_irq(&udc->lock);
2344
2345 mv_udc_disable_internal(udc);
2346 }
e7cddda4 2347
2348 return 0;
2349}
2350
aac16b63 2351static int mv_udc_resume(struct device *dev)
e7cddda4 2352{
aac16b63 2353 struct mv_udc *udc;
e7cddda4 2354 int retval;
2355
aac16b63
CX		 2356 udc = dev_get_drvdata(dev);
2357
5076ae55 2358 /* if OTG is enabled, the following will be done in OTG driver*/
449d04a9 2359 if (udc->transceiver)
5076ae55
NZ		 2360 return 0;
2361
2362 if (!udc->clock_gating) {
2363 retval = mv_udc_enable_internal(udc);
2364 if (retval)
dde34cc5 2365 return retval;
5076ae55
NZ		 2366
2367 if (udc->driver && udc->softconnect) {
2368 udc_reset(udc);
2369 ep0_reset(udc);
2370 udc_start(udc);
dde34cc5 2371 }
e7cddda4 2372 }
dde34cc5 2373
e7cddda4 2374 return 0;
2375}
2376
2377static const struct dev_pm_ops mv_udc_pm_ops = {
2378 .suspend = mv_udc_suspend,
2379 .resume = mv_udc_resume,
2380};
2381#endif
2382
3517c31a 2383static void mv_udc_shutdown(struct platform_device *pdev)
046b07ac 2384{
aac16b63 2385 struct mv_udc *udc;
046b07ac
NZ		 2386 u32 mode;
2387
3517c31a 2388 udc = platform_get_drvdata(pdev);
046b07ac 2389 /* reset controller mode to IDLE */
1dcaa252 2390 mv_udc_enable(udc);
046b07ac
NZ		 2391 mode = readl(&udc->op_regs->usbmode);
2392 mode &= ~3;
2393 writel(mode, &udc->op_regs->usbmode);
1dcaa252 2394 mv_udc_disable(udc);
046b07ac
NZ		 2395}
2396
e7cddda4 2397static struct platform_driver udc_driver = {
2398 .probe = mv_udc_probe,
6a6f05f0 2399 .remove = mv_udc_remove,
046b07ac 2400 .shutdown = mv_udc_shutdown,
e7cddda4 2401 .driver = {
2402 .owner = THIS_MODULE,
5e6c86b0 2403 .name = "mv-udc",
e7cddda4 2404#ifdef CONFIG_PM
cb424473 2405 .pm = &mv_udc_pm_ops,
e7cddda4 2406#endif
2407 },
2408};
cc27c96c
AL		 2409
2410module_platform_driver(udc_driver);
ee0db58a 2411MODULE_ALIAS("platform:mv-udc");
e7cddda4 2412MODULE_DESCRIPTION(DRIVER_DESC);
2413MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>");
2414MODULE_VERSION(DRIVER_VERSION);
2415MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)