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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> | |
22 | #include <linux/init.h> | |
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/system.h> |
38 | #include <asm/unaligned.h> | |
39 | ||
40 | #include "mv_udc.h" | |
41 | ||
42 | #define DRIVER_DESC "Marvell PXA USB Device Controller driver" | |
43 | #define DRIVER_VERSION "8 Nov 2010" | |
44 | ||
45 | #define ep_dir(ep) (((ep)->ep_num == 0) ? \ | |
46 | ((ep)->udc->ep0_dir) : ((ep)->direction)) | |
47 | ||
48 | /* timeout value -- usec */ | |
49 | #define RESET_TIMEOUT 10000 | |
50 | #define FLUSH_TIMEOUT 10000 | |
51 | #define EPSTATUS_TIMEOUT 10000 | |
52 | #define PRIME_TIMEOUT 10000 | |
53 | #define READSAFE_TIMEOUT 1000 | |
54 | #define DTD_TIMEOUT 1000 | |
55 | ||
56 | #define LOOPS_USEC_SHIFT 4 | |
57 | #define LOOPS_USEC (1 << LOOPS_USEC_SHIFT) | |
58 | #define LOOPS(timeout) ((timeout) >> LOOPS_USEC_SHIFT) | |
59 | ||
dde34cc5 NZ |
60 | static DECLARE_COMPLETION(release_done); |
61 | ||
e7cddda4 | 62 | static const char driver_name[] = "mv_udc"; |
63 | static const char driver_desc[] = DRIVER_DESC; | |
64 | ||
65 | /* controller device global variable */ | |
66 | static struct mv_udc *the_controller; | |
67 | int mv_usb_otgsc; | |
68 | ||
69 | static void nuke(struct mv_ep *ep, int status); | |
1aec033b | 70 | static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver); |
e7cddda4 | 71 | |
72 | /* for endpoint 0 operations */ | |
73 | static const struct usb_endpoint_descriptor mv_ep0_desc = { | |
74 | .bLength = USB_DT_ENDPOINT_SIZE, | |
75 | .bDescriptorType = USB_DT_ENDPOINT, | |
76 | .bEndpointAddress = 0, | |
77 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
78 | .wMaxPacketSize = EP0_MAX_PKT_SIZE, | |
79 | }; | |
80 | ||
81 | static void ep0_reset(struct mv_udc *udc) | |
82 | { | |
83 | struct mv_ep *ep; | |
84 | u32 epctrlx; | |
85 | int i = 0; | |
86 | ||
87 | /* ep0 in and out */ | |
88 | for (i = 0; i < 2; i++) { | |
89 | ep = &udc->eps[i]; | |
90 | ep->udc = udc; | |
91 | ||
92 | /* ep0 dQH */ | |
93 | ep->dqh = &udc->ep_dqh[i]; | |
94 | ||
95 | /* configure ep0 endpoint capabilities in dQH */ | |
96 | ep->dqh->max_packet_length = | |
97 | (EP0_MAX_PKT_SIZE << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) | |
98 | | EP_QUEUE_HEAD_IOS; | |
99 | ||
fbebe1f0 NZ |
100 | ep->dqh->next_dtd_ptr = EP_QUEUE_HEAD_NEXT_TERMINATE; |
101 | ||
e7cddda4 | 102 | epctrlx = readl(&udc->op_regs->epctrlx[0]); |
103 | if (i) { /* TX */ | |
43ad9f3f | 104 | epctrlx |= EPCTRL_TX_ENABLE |
e7cddda4 | 105 | | (USB_ENDPOINT_XFER_CONTROL |
106 | << EPCTRL_TX_EP_TYPE_SHIFT); | |
107 | ||
108 | } else { /* RX */ | |
43ad9f3f | 109 | epctrlx |= EPCTRL_RX_ENABLE |
e7cddda4 | 110 | | (USB_ENDPOINT_XFER_CONTROL |
111 | << EPCTRL_RX_EP_TYPE_SHIFT); | |
112 | } | |
113 | ||
114 | writel(epctrlx, &udc->op_regs->epctrlx[0]); | |
115 | } | |
116 | } | |
117 | ||
118 | /* protocol ep0 stall, will automatically be cleared on new transaction */ | |
119 | static void ep0_stall(struct mv_udc *udc) | |
120 | { | |
121 | u32 epctrlx; | |
122 | ||
123 | /* set TX and RX to stall */ | |
124 | epctrlx = readl(&udc->op_regs->epctrlx[0]); | |
125 | epctrlx |= EPCTRL_RX_EP_STALL | EPCTRL_TX_EP_STALL; | |
126 | writel(epctrlx, &udc->op_regs->epctrlx[0]); | |
127 | ||
128 | /* update ep0 state */ | |
129 | udc->ep0_state = WAIT_FOR_SETUP; | |
130 | udc->ep0_dir = EP_DIR_OUT; | |
131 | } | |
132 | ||
133 | static int process_ep_req(struct mv_udc *udc, int index, | |
134 | struct mv_req *curr_req) | |
135 | { | |
136 | struct mv_dtd *curr_dtd; | |
137 | struct mv_dqh *curr_dqh; | |
138 | int td_complete, actual, remaining_length; | |
139 | int i, direction; | |
140 | int retval = 0; | |
141 | u32 errors; | |
daec765d | 142 | u32 bit_pos; |
e7cddda4 | 143 | |
144 | curr_dqh = &udc->ep_dqh[index]; | |
145 | direction = index % 2; | |
146 | ||
147 | curr_dtd = curr_req->head; | |
148 | td_complete = 0; | |
149 | actual = curr_req->req.length; | |
150 | ||
151 | for (i = 0; i < curr_req->dtd_count; i++) { | |
152 | if (curr_dtd->size_ioc_sts & DTD_STATUS_ACTIVE) { | |
153 | dev_dbg(&udc->dev->dev, "%s, dTD not completed\n", | |
154 | udc->eps[index].name); | |
155 | return 1; | |
156 | } | |
157 | ||
158 | errors = curr_dtd->size_ioc_sts & DTD_ERROR_MASK; | |
159 | if (!errors) { | |
daec765d | 160 | remaining_length = |
e7cddda4 | 161 | (curr_dtd->size_ioc_sts & DTD_PACKET_SIZE) |
162 | >> DTD_LENGTH_BIT_POS; | |
163 | actual -= remaining_length; | |
daec765d NZ |
164 | |
165 | if (remaining_length) { | |
166 | if (direction) { | |
167 | dev_dbg(&udc->dev->dev, | |
168 | "TX dTD remains data\n"); | |
169 | retval = -EPROTO; | |
170 | break; | |
171 | } else | |
172 | break; | |
173 | } | |
e7cddda4 | 174 | } else { |
175 | dev_info(&udc->dev->dev, | |
176 | "complete_tr error: ep=%d %s: error = 0x%x\n", | |
177 | index >> 1, direction ? "SEND" : "RECV", | |
178 | errors); | |
179 | if (errors & DTD_STATUS_HALTED) { | |
180 | /* Clear the errors and Halt condition */ | |
181 | curr_dqh->size_ioc_int_sts &= ~errors; | |
182 | retval = -EPIPE; | |
183 | } else if (errors & DTD_STATUS_DATA_BUFF_ERR) { | |
184 | retval = -EPROTO; | |
185 | } else if (errors & DTD_STATUS_TRANSACTION_ERR) { | |
186 | retval = -EILSEQ; | |
187 | } | |
188 | } | |
189 | if (i != curr_req->dtd_count - 1) | |
190 | curr_dtd = (struct mv_dtd *)curr_dtd->next_dtd_virt; | |
191 | } | |
192 | if (retval) | |
193 | return retval; | |
194 | ||
daec765d NZ |
195 | if (direction == EP_DIR_OUT) |
196 | bit_pos = 1 << curr_req->ep->ep_num; | |
197 | else | |
198 | bit_pos = 1 << (16 + curr_req->ep->ep_num); | |
199 | ||
200 | while ((curr_dqh->curr_dtd_ptr == curr_dtd->td_dma)) { | |
201 | if (curr_dtd->dtd_next == EP_QUEUE_HEAD_NEXT_TERMINATE) { | |
202 | while (readl(&udc->op_regs->epstatus) & bit_pos) | |
203 | udelay(1); | |
204 | break; | |
205 | } | |
206 | udelay(1); | |
207 | } | |
208 | ||
e7cddda4 | 209 | curr_req->req.actual = actual; |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
214 | /* | |
215 | * done() - retire a request; caller blocked irqs | |
216 | * @status : request status to be set, only works when | |
217 | * request is still in progress. | |
218 | */ | |
219 | static void done(struct mv_ep *ep, struct mv_req *req, int status) | |
220 | { | |
221 | struct mv_udc *udc = NULL; | |
222 | unsigned char stopped = ep->stopped; | |
223 | struct mv_dtd *curr_td, *next_td; | |
224 | int j; | |
225 | ||
226 | udc = (struct mv_udc *)ep->udc; | |
227 | /* Removed the req from fsl_ep->queue */ | |
228 | list_del_init(&req->queue); | |
229 | ||
230 | /* req.status should be set as -EINPROGRESS in ep_queue() */ | |
231 | if (req->req.status == -EINPROGRESS) | |
232 | req->req.status = status; | |
233 | else | |
234 | status = req->req.status; | |
235 | ||
236 | /* Free dtd for the request */ | |
237 | next_td = req->head; | |
238 | for (j = 0; j < req->dtd_count; j++) { | |
239 | curr_td = next_td; | |
240 | if (j != req->dtd_count - 1) | |
241 | next_td = curr_td->next_dtd_virt; | |
242 | dma_pool_free(udc->dtd_pool, curr_td, curr_td->td_dma); | |
243 | } | |
244 | ||
245 | if (req->mapped) { | |
246 | dma_unmap_single(ep->udc->gadget.dev.parent, | |
247 | req->req.dma, req->req.length, | |
248 | ((ep_dir(ep) == EP_DIR_IN) ? | |
249 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
250 | req->req.dma = DMA_ADDR_INVALID; | |
251 | req->mapped = 0; | |
252 | } else | |
253 | dma_sync_single_for_cpu(ep->udc->gadget.dev.parent, | |
254 | req->req.dma, req->req.length, | |
255 | ((ep_dir(ep) == EP_DIR_IN) ? | |
256 | DMA_TO_DEVICE : DMA_FROM_DEVICE)); | |
257 | ||
258 | if (status && (status != -ESHUTDOWN)) | |
259 | dev_info(&udc->dev->dev, "complete %s req %p stat %d len %u/%u", | |
260 | ep->ep.name, &req->req, status, | |
261 | req->req.actual, req->req.length); | |
262 | ||
263 | ep->stopped = 1; | |
264 | ||
265 | spin_unlock(&ep->udc->lock); | |
266 | /* | |
267 | * complete() is from gadget layer, | |
268 | * eg fsg->bulk_in_complete() | |
269 | */ | |
270 | if (req->req.complete) | |
271 | req->req.complete(&ep->ep, &req->req); | |
272 | ||
273 | spin_lock(&ep->udc->lock); | |
274 | ep->stopped = stopped; | |
275 | } | |
276 | ||
277 | static int queue_dtd(struct mv_ep *ep, struct mv_req *req) | |
278 | { | |
279 | u32 tmp, epstatus, bit_pos, direction; | |
280 | struct mv_udc *udc; | |
281 | struct mv_dqh *dqh; | |
282 | unsigned int loops; | |
283 | int readsafe, retval = 0; | |
284 | ||
285 | udc = ep->udc; | |
286 | direction = ep_dir(ep); | |
287 | dqh = &(udc->ep_dqh[ep->ep_num * 2 + direction]); | |
288 | bit_pos = 1 << (((direction == EP_DIR_OUT) ? 0 : 16) + ep->ep_num); | |
289 | ||
290 | /* check if the pipe is empty */ | |
291 | if (!(list_empty(&ep->queue))) { | |
292 | struct mv_req *lastreq; | |
293 | lastreq = list_entry(ep->queue.prev, struct mv_req, queue); | |
294 | lastreq->tail->dtd_next = | |
295 | req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK; | |
296 | if (readl(&udc->op_regs->epprime) & bit_pos) { | |
297 | loops = LOOPS(PRIME_TIMEOUT); | |
298 | while (readl(&udc->op_regs->epprime) & bit_pos) { | |
299 | if (loops == 0) { | |
300 | retval = -ETIME; | |
301 | goto done; | |
302 | } | |
303 | udelay(LOOPS_USEC); | |
304 | loops--; | |
305 | } | |
306 | if (readl(&udc->op_regs->epstatus) & bit_pos) | |
307 | goto done; | |
308 | } | |
309 | readsafe = 0; | |
310 | loops = LOOPS(READSAFE_TIMEOUT); | |
311 | while (readsafe == 0) { | |
312 | if (loops == 0) { | |
313 | retval = -ETIME; | |
314 | goto done; | |
315 | } | |
316 | /* start with setting the semaphores */ | |
317 | tmp = readl(&udc->op_regs->usbcmd); | |
318 | tmp |= USBCMD_ATDTW_TRIPWIRE_SET; | |
319 | writel(tmp, &udc->op_regs->usbcmd); | |
320 | ||
321 | /* read the endpoint status */ | |
322 | epstatus = readl(&udc->op_regs->epstatus) & bit_pos; | |
323 | ||
324 | /* | |
325 | * Reread the ATDTW semaphore bit to check if it is | |
326 | * cleared. When hardware see a hazard, it will clear | |
327 | * the bit or else we remain set to 1 and we can | |
328 | * proceed with priming of endpoint if not already | |
329 | * primed. | |
330 | */ | |
331 | if (readl(&udc->op_regs->usbcmd) | |
332 | & USBCMD_ATDTW_TRIPWIRE_SET) { | |
333 | readsafe = 1; | |
334 | } | |
335 | loops--; | |
336 | udelay(LOOPS_USEC); | |
337 | } | |
338 | ||
339 | /* Clear the semaphore */ | |
340 | tmp = readl(&udc->op_regs->usbcmd); | |
341 | tmp &= USBCMD_ATDTW_TRIPWIRE_CLEAR; | |
342 | writel(tmp, &udc->op_regs->usbcmd); | |
343 | ||
344 | /* If endpoint is not active, we activate it now. */ | |
345 | if (!epstatus) { | |
346 | if (direction == EP_DIR_IN) { | |
347 | struct mv_dtd *curr_dtd = dma_to_virt( | |
348 | &udc->dev->dev, dqh->curr_dtd_ptr); | |
349 | ||
350 | loops = LOOPS(DTD_TIMEOUT); | |
351 | while (curr_dtd->size_ioc_sts | |
352 | & DTD_STATUS_ACTIVE) { | |
353 | if (loops == 0) { | |
354 | retval = -ETIME; | |
355 | goto done; | |
356 | } | |
357 | loops--; | |
358 | udelay(LOOPS_USEC); | |
359 | } | |
360 | } | |
361 | /* No other transfers on the queue */ | |
362 | ||
363 | /* Write dQH next pointer and terminate bit to 0 */ | |
364 | dqh->next_dtd_ptr = req->head->td_dma | |
365 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK; | |
366 | dqh->size_ioc_int_sts = 0; | |
367 | ||
368 | /* | |
369 | * Ensure that updates to the QH will | |
25985edc | 370 | * occur before priming. |
e7cddda4 | 371 | */ |
372 | wmb(); | |
373 | ||
374 | /* Prime the Endpoint */ | |
375 | writel(bit_pos, &udc->op_regs->epprime); | |
376 | } | |
377 | } else { | |
378 | /* Write dQH next pointer and terminate bit to 0 */ | |
379 | dqh->next_dtd_ptr = req->head->td_dma | |
69932487 | 380 | & EP_QUEUE_HEAD_NEXT_POINTER_MASK; |
e7cddda4 | 381 | dqh->size_ioc_int_sts = 0; |
382 | ||
25985edc | 383 | /* Ensure that updates to the QH will occur before priming. */ |
e7cddda4 | 384 | wmb(); |
385 | ||
386 | /* Prime the Endpoint */ | |
387 | writel(bit_pos, &udc->op_regs->epprime); | |
388 | ||
389 | if (direction == EP_DIR_IN) { | |
390 | /* FIXME add status check after prime the IN ep */ | |
391 | int prime_again; | |
392 | u32 curr_dtd_ptr = dqh->curr_dtd_ptr; | |
393 | ||
394 | loops = LOOPS(DTD_TIMEOUT); | |
395 | prime_again = 0; | |
396 | while ((curr_dtd_ptr != req->head->td_dma)) { | |
397 | curr_dtd_ptr = dqh->curr_dtd_ptr; | |
398 | if (loops == 0) { | |
399 | dev_err(&udc->dev->dev, | |
400 | "failed to prime %s\n", | |
401 | ep->name); | |
402 | retval = -ETIME; | |
403 | goto done; | |
404 | } | |
405 | loops--; | |
406 | udelay(LOOPS_USEC); | |
407 | ||
408 | if (loops == (LOOPS(DTD_TIMEOUT) >> 2)) { | |
409 | if (prime_again) | |
410 | goto done; | |
411 | dev_info(&udc->dev->dev, | |
412 | "prime again\n"); | |
413 | writel(bit_pos, | |
414 | &udc->op_regs->epprime); | |
415 | prime_again = 1; | |
416 | } | |
417 | } | |
418 | } | |
419 | } | |
420 | done: | |
69932487 | 421 | return retval; |
e7cddda4 | 422 | } |
423 | ||
424 | static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length, | |
425 | dma_addr_t *dma, int *is_last) | |
426 | { | |
427 | u32 temp; | |
428 | struct mv_dtd *dtd; | |
429 | struct mv_udc *udc; | |
430 | ||
431 | /* how big will this transfer be? */ | |
432 | *length = min(req->req.length - req->req.actual, | |
433 | (unsigned)EP_MAX_LENGTH_TRANSFER); | |
434 | ||
435 | udc = req->ep->udc; | |
436 | ||
437 | /* | |
438 | * Be careful that no _GFP_HIGHMEM is set, | |
439 | * or we can not use dma_to_virt | |
440 | */ | |
441 | dtd = dma_pool_alloc(udc->dtd_pool, GFP_KERNEL, dma); | |
442 | if (dtd == NULL) | |
443 | return dtd; | |
444 | ||
445 | dtd->td_dma = *dma; | |
446 | /* initialize buffer page pointers */ | |
447 | temp = (u32)(req->req.dma + req->req.actual); | |
448 | dtd->buff_ptr0 = cpu_to_le32(temp); | |
449 | temp &= ~0xFFF; | |
450 | dtd->buff_ptr1 = cpu_to_le32(temp + 0x1000); | |
451 | dtd->buff_ptr2 = cpu_to_le32(temp + 0x2000); | |
452 | dtd->buff_ptr3 = cpu_to_le32(temp + 0x3000); | |
453 | dtd->buff_ptr4 = cpu_to_le32(temp + 0x4000); | |
454 | ||
455 | req->req.actual += *length; | |
456 | ||
457 | /* zlp is needed if req->req.zero is set */ | |
458 | if (req->req.zero) { | |
459 | if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) | |
460 | *is_last = 1; | |
461 | else | |
462 | *is_last = 0; | |
463 | } else if (req->req.length == req->req.actual) | |
464 | *is_last = 1; | |
465 | else | |
466 | *is_last = 0; | |
467 | ||
468 | /* Fill in the transfer size; set active bit */ | |
469 | temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE); | |
470 | ||
471 | /* Enable interrupt for the last dtd of a request */ | |
472 | if (*is_last && !req->req.no_interrupt) | |
473 | temp |= DTD_IOC; | |
474 | ||
475 | dtd->size_ioc_sts = temp; | |
476 | ||
477 | mb(); | |
478 | ||
479 | return dtd; | |
480 | } | |
481 | ||
482 | /* generate dTD linked list for a request */ | |
483 | static int req_to_dtd(struct mv_req *req) | |
484 | { | |
485 | unsigned count; | |
486 | int is_last, is_first = 1; | |
487 | struct mv_dtd *dtd, *last_dtd = NULL; | |
488 | struct mv_udc *udc; | |
489 | dma_addr_t dma; | |
490 | ||
491 | udc = req->ep->udc; | |
492 | ||
493 | do { | |
494 | dtd = build_dtd(req, &count, &dma, &is_last); | |
495 | if (dtd == NULL) | |
496 | return -ENOMEM; | |
497 | ||
498 | if (is_first) { | |
499 | is_first = 0; | |
500 | req->head = dtd; | |
501 | } else { | |
502 | last_dtd->dtd_next = dma; | |
503 | last_dtd->next_dtd_virt = dtd; | |
504 | } | |
505 | last_dtd = dtd; | |
506 | req->dtd_count++; | |
507 | } while (!is_last); | |
508 | ||
509 | /* set terminate bit to 1 for the last dTD */ | |
510 | dtd->dtd_next = DTD_NEXT_TERMINATE; | |
511 | ||
512 | req->tail = dtd; | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static int mv_ep_enable(struct usb_ep *_ep, | |
518 | const struct usb_endpoint_descriptor *desc) | |
519 | { | |
520 | struct mv_udc *udc; | |
521 | struct mv_ep *ep; | |
522 | struct mv_dqh *dqh; | |
523 | u16 max = 0; | |
524 | u32 bit_pos, epctrlx, direction; | |
525 | unsigned char zlt = 0, ios = 0, mult = 0; | |
27cec2b2 | 526 | unsigned long flags; |
e7cddda4 | 527 | |
528 | ep = container_of(_ep, struct mv_ep, ep); | |
529 | udc = ep->udc; | |
530 | ||
531 | if (!_ep || !desc || ep->desc | |
532 | || desc->bDescriptorType != USB_DT_ENDPOINT) | |
533 | return -EINVAL; | |
534 | ||
535 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) | |
536 | return -ESHUTDOWN; | |
537 | ||
538 | direction = ep_dir(ep); | |
29cc8897 | 539 | max = usb_endpoint_maxp(desc); |
e7cddda4 | 540 | |
541 | /* | |
542 | * disable HW zero length termination select | |
543 | * driver handles zero length packet through req->req.zero | |
544 | */ | |
545 | zlt = 1; | |
546 | ||
e7cddda4 | 547 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); |
548 | ||
549 | /* Check if the Endpoint is Primed */ | |
550 | if ((readl(&udc->op_regs->epprime) & bit_pos) | |
551 | || (readl(&udc->op_regs->epstatus) & bit_pos)) { | |
552 | dev_info(&udc->dev->dev, | |
553 | "ep=%d %s: Init ERROR: ENDPTPRIME=0x%x," | |
554 | " ENDPTSTATUS=0x%x, bit_pos=0x%x\n", | |
555 | (unsigned)ep->ep_num, direction ? "SEND" : "RECV", | |
556 | (unsigned)readl(&udc->op_regs->epprime), | |
557 | (unsigned)readl(&udc->op_regs->epstatus), | |
558 | (unsigned)bit_pos); | |
559 | goto en_done; | |
560 | } | |
561 | /* Set the max packet length, interrupt on Setup and Mult fields */ | |
562 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
563 | case USB_ENDPOINT_XFER_BULK: | |
564 | zlt = 1; | |
565 | mult = 0; | |
566 | break; | |
567 | case USB_ENDPOINT_XFER_CONTROL: | |
568 | ios = 1; | |
569 | case USB_ENDPOINT_XFER_INT: | |
570 | mult = 0; | |
571 | break; | |
572 | case USB_ENDPOINT_XFER_ISOC: | |
573 | /* Calculate transactions needed for high bandwidth iso */ | |
574 | mult = (unsigned char)(1 + ((max >> 11) & 0x03)); | |
bedcff97 | 575 | max = max & 0x7ff; /* bit 0~10 */ |
e7cddda4 | 576 | /* 3 transactions at most */ |
577 | if (mult > 3) | |
578 | goto en_done; | |
579 | break; | |
580 | default: | |
581 | goto en_done; | |
582 | } | |
27cec2b2 NZ |
583 | |
584 | spin_lock_irqsave(&udc->lock, flags); | |
585 | /* Get the endpoint queue head address */ | |
586 | dqh = ep->dqh; | |
e7cddda4 | 587 | dqh->max_packet_length = (max << EP_QUEUE_HEAD_MAX_PKT_LEN_POS) |
588 | | (mult << EP_QUEUE_HEAD_MULT_POS) | |
589 | | (zlt ? EP_QUEUE_HEAD_ZLT_SEL : 0) | |
590 | | (ios ? EP_QUEUE_HEAD_IOS : 0); | |
591 | dqh->next_dtd_ptr = 1; | |
592 | dqh->size_ioc_int_sts = 0; | |
593 | ||
594 | ep->ep.maxpacket = max; | |
595 | ep->desc = desc; | |
596 | ep->stopped = 0; | |
597 | ||
598 | /* Enable the endpoint for Rx or Tx and set the endpoint type */ | |
599 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
600 | if (direction == EP_DIR_IN) { | |
601 | epctrlx &= ~EPCTRL_TX_ALL_MASK; | |
602 | epctrlx |= EPCTRL_TX_ENABLE | EPCTRL_TX_DATA_TOGGLE_RST | |
603 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
604 | << EPCTRL_TX_EP_TYPE_SHIFT); | |
605 | } else { | |
606 | epctrlx &= ~EPCTRL_RX_ALL_MASK; | |
607 | epctrlx |= EPCTRL_RX_ENABLE | EPCTRL_RX_DATA_TOGGLE_RST | |
608 | | ((desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
609 | << EPCTRL_RX_EP_TYPE_SHIFT); | |
610 | } | |
611 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
612 | ||
613 | /* | |
614 | * Implement Guideline (GL# USB-7) The unused endpoint type must | |
615 | * be programmed to bulk. | |
616 | */ | |
617 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
618 | if ((epctrlx & EPCTRL_RX_ENABLE) == 0) { | |
615268b0 | 619 | epctrlx |= (USB_ENDPOINT_XFER_BULK |
e7cddda4 | 620 | << EPCTRL_RX_EP_TYPE_SHIFT); |
621 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
622 | } | |
623 | ||
624 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
625 | if ((epctrlx & EPCTRL_TX_ENABLE) == 0) { | |
615268b0 | 626 | epctrlx |= (USB_ENDPOINT_XFER_BULK |
e7cddda4 | 627 | << EPCTRL_TX_EP_TYPE_SHIFT); |
628 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
629 | } | |
630 | ||
27cec2b2 NZ |
631 | spin_unlock_irqrestore(&udc->lock, flags); |
632 | ||
e7cddda4 | 633 | return 0; |
634 | en_done: | |
635 | return -EINVAL; | |
636 | } | |
637 | ||
638 | static int mv_ep_disable(struct usb_ep *_ep) | |
639 | { | |
640 | struct mv_udc *udc; | |
641 | struct mv_ep *ep; | |
642 | struct mv_dqh *dqh; | |
643 | u32 bit_pos, epctrlx, direction; | |
27cec2b2 | 644 | unsigned long flags; |
e7cddda4 | 645 | |
646 | ep = container_of(_ep, struct mv_ep, ep); | |
647 | if ((_ep == NULL) || !ep->desc) | |
648 | return -EINVAL; | |
649 | ||
650 | udc = ep->udc; | |
651 | ||
652 | /* Get the endpoint queue head address */ | |
653 | dqh = ep->dqh; | |
654 | ||
27cec2b2 NZ |
655 | spin_lock_irqsave(&udc->lock, flags); |
656 | ||
e7cddda4 | 657 | direction = ep_dir(ep); |
658 | bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); | |
659 | ||
660 | /* Reset the max packet length and the interrupt on Setup */ | |
661 | dqh->max_packet_length = 0; | |
662 | ||
663 | /* Disable the endpoint for Rx or Tx and reset the endpoint type */ | |
664 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
665 | epctrlx &= ~((direction == EP_DIR_IN) | |
666 | ? (EPCTRL_TX_ENABLE | EPCTRL_TX_TYPE) | |
667 | : (EPCTRL_RX_ENABLE | EPCTRL_RX_TYPE)); | |
668 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
669 | ||
670 | /* nuke all pending requests (does flush) */ | |
671 | nuke(ep, -ESHUTDOWN); | |
672 | ||
673 | ep->desc = NULL; | |
674 | ep->stopped = 1; | |
27cec2b2 NZ |
675 | |
676 | spin_unlock_irqrestore(&udc->lock, flags); | |
677 | ||
e7cddda4 | 678 | return 0; |
679 | } | |
680 | ||
681 | static struct usb_request * | |
682 | mv_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) | |
683 | { | |
684 | struct mv_req *req = NULL; | |
685 | ||
686 | req = kzalloc(sizeof *req, gfp_flags); | |
687 | if (!req) | |
688 | return NULL; | |
689 | ||
690 | req->req.dma = DMA_ADDR_INVALID; | |
691 | INIT_LIST_HEAD(&req->queue); | |
692 | ||
693 | return &req->req; | |
694 | } | |
695 | ||
696 | static void mv_free_request(struct usb_ep *_ep, struct usb_request *_req) | |
697 | { | |
698 | struct mv_req *req = NULL; | |
699 | ||
700 | req = container_of(_req, struct mv_req, req); | |
701 | ||
702 | if (_req) | |
703 | kfree(req); | |
704 | } | |
705 | ||
706 | static void mv_ep_fifo_flush(struct usb_ep *_ep) | |
707 | { | |
708 | struct mv_udc *udc; | |
709 | u32 bit_pos, direction; | |
0c70840b | 710 | struct mv_ep *ep; |
e7cddda4 | 711 | unsigned int loops; |
712 | ||
0c70840b NZ |
713 | if (!_ep) |
714 | return; | |
715 | ||
716 | ep = container_of(_ep, struct mv_ep, ep); | |
717 | if (!ep->desc) | |
718 | return; | |
719 | ||
e7cddda4 | 720 | udc = ep->udc; |
721 | direction = ep_dir(ep); | |
e7cddda4 | 722 | |
0c70840b NZ |
723 | if (ep->ep_num == 0) |
724 | bit_pos = (1 << 16) | 1; | |
725 | else if (direction == EP_DIR_OUT) | |
726 | bit_pos = 1 << ep->ep_num; | |
727 | else | |
728 | bit_pos = 1 << (16 + ep->ep_num); | |
729 | ||
e7cddda4 | 730 | loops = LOOPS(EPSTATUS_TIMEOUT); |
0c70840b | 731 | do { |
e7cddda4 | 732 | unsigned int inter_loops; |
733 | ||
734 | if (loops == 0) { | |
735 | dev_err(&udc->dev->dev, | |
736 | "TIMEOUT for ENDPTSTATUS=0x%x, bit_pos=0x%x\n", | |
737 | (unsigned)readl(&udc->op_regs->epstatus), | |
738 | (unsigned)bit_pos); | |
739 | return; | |
740 | } | |
741 | /* Write 1 to the Flush register */ | |
742 | writel(bit_pos, &udc->op_regs->epflush); | |
743 | ||
744 | /* Wait until flushing completed */ | |
745 | inter_loops = LOOPS(FLUSH_TIMEOUT); | |
0c70840b | 746 | while (readl(&udc->op_regs->epflush)) { |
e7cddda4 | 747 | /* |
748 | * ENDPTFLUSH bit should be cleared to indicate this | |
749 | * operation is complete | |
750 | */ | |
751 | if (inter_loops == 0) { | |
752 | dev_err(&udc->dev->dev, | |
753 | "TIMEOUT for ENDPTFLUSH=0x%x," | |
754 | "bit_pos=0x%x\n", | |
755 | (unsigned)readl(&udc->op_regs->epflush), | |
756 | (unsigned)bit_pos); | |
757 | return; | |
758 | } | |
759 | inter_loops--; | |
760 | udelay(LOOPS_USEC); | |
761 | } | |
762 | loops--; | |
0c70840b | 763 | } while (readl(&udc->op_regs->epstatus) & bit_pos); |
e7cddda4 | 764 | } |
765 | ||
766 | /* queues (submits) an I/O request to an endpoint */ | |
767 | static int | |
768 | mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) | |
769 | { | |
770 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); | |
771 | struct mv_req *req = container_of(_req, struct mv_req, req); | |
772 | struct mv_udc *udc = ep->udc; | |
773 | unsigned long flags; | |
774 | ||
775 | /* catch various bogus parameters */ | |
776 | if (!_req || !req->req.complete || !req->req.buf | |
777 | || !list_empty(&req->queue)) { | |
778 | dev_err(&udc->dev->dev, "%s, bad params", __func__); | |
779 | return -EINVAL; | |
780 | } | |
781 | if (unlikely(!_ep || !ep->desc)) { | |
782 | dev_err(&udc->dev->dev, "%s, bad ep", __func__); | |
783 | return -EINVAL; | |
784 | } | |
785 | if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { | |
786 | if (req->req.length > ep->ep.maxpacket) | |
787 | return -EMSGSIZE; | |
788 | } | |
789 | ||
790 | udc = ep->udc; | |
791 | if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) | |
792 | return -ESHUTDOWN; | |
793 | ||
794 | req->ep = ep; | |
795 | ||
796 | /* map virtual address to hardware */ | |
797 | if (req->req.dma == DMA_ADDR_INVALID) { | |
798 | req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, | |
799 | req->req.buf, | |
800 | req->req.length, ep_dir(ep) | |
801 | ? DMA_TO_DEVICE | |
802 | : DMA_FROM_DEVICE); | |
803 | req->mapped = 1; | |
804 | } else { | |
805 | dma_sync_single_for_device(ep->udc->gadget.dev.parent, | |
806 | req->req.dma, req->req.length, | |
807 | ep_dir(ep) | |
808 | ? DMA_TO_DEVICE | |
809 | : DMA_FROM_DEVICE); | |
810 | req->mapped = 0; | |
811 | } | |
812 | ||
813 | req->req.status = -EINPROGRESS; | |
814 | req->req.actual = 0; | |
815 | req->dtd_count = 0; | |
816 | ||
817 | spin_lock_irqsave(&udc->lock, flags); | |
818 | ||
819 | /* build dtds and push them to device queue */ | |
820 | if (!req_to_dtd(req)) { | |
821 | int retval; | |
822 | retval = queue_dtd(ep, req); | |
823 | if (retval) { | |
824 | spin_unlock_irqrestore(&udc->lock, flags); | |
825 | return retval; | |
826 | } | |
827 | } else { | |
828 | spin_unlock_irqrestore(&udc->lock, flags); | |
829 | return -ENOMEM; | |
830 | } | |
831 | ||
832 | /* Update ep0 state */ | |
833 | if (ep->ep_num == 0) | |
834 | udc->ep0_state = DATA_STATE_XMIT; | |
835 | ||
836 | /* irq handler advances the queue */ | |
837 | if (req != NULL) | |
838 | list_add_tail(&req->queue, &ep->queue); | |
839 | spin_unlock_irqrestore(&udc->lock, flags); | |
840 | ||
841 | return 0; | |
842 | } | |
843 | ||
844 | /* dequeues (cancels, unlinks) an I/O request from an endpoint */ | |
845 | static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) | |
846 | { | |
847 | struct mv_ep *ep = container_of(_ep, struct mv_ep, ep); | |
848 | struct mv_req *req; | |
849 | struct mv_udc *udc = ep->udc; | |
850 | unsigned long flags; | |
851 | int stopped, ret = 0; | |
852 | u32 epctrlx; | |
853 | ||
854 | if (!_ep || !_req) | |
855 | return -EINVAL; | |
856 | ||
857 | spin_lock_irqsave(&ep->udc->lock, flags); | |
858 | stopped = ep->stopped; | |
859 | ||
860 | /* Stop the ep before we deal with the queue */ | |
861 | ep->stopped = 1; | |
862 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
863 | if (ep_dir(ep) == EP_DIR_IN) | |
864 | epctrlx &= ~EPCTRL_TX_ENABLE; | |
865 | else | |
866 | epctrlx &= ~EPCTRL_RX_ENABLE; | |
867 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
868 | ||
869 | /* make sure it's actually queued on this endpoint */ | |
870 | list_for_each_entry(req, &ep->queue, queue) { | |
871 | if (&req->req == _req) | |
872 | break; | |
873 | } | |
874 | if (&req->req != _req) { | |
875 | ret = -EINVAL; | |
876 | goto out; | |
877 | } | |
878 | ||
879 | /* The request is in progress, or completed but not dequeued */ | |
880 | if (ep->queue.next == &req->queue) { | |
881 | _req->status = -ECONNRESET; | |
882 | mv_ep_fifo_flush(_ep); /* flush current transfer */ | |
883 | ||
884 | /* The request isn't the last request in this ep queue */ | |
885 | if (req->queue.next != &ep->queue) { | |
886 | struct mv_dqh *qh; | |
887 | struct mv_req *next_req; | |
888 | ||
889 | qh = ep->dqh; | |
890 | next_req = list_entry(req->queue.next, struct mv_req, | |
891 | queue); | |
892 | ||
893 | /* Point the QH to the first TD of next request */ | |
894 | writel((u32) next_req->head, &qh->curr_dtd_ptr); | |
895 | } else { | |
896 | struct mv_dqh *qh; | |
897 | ||
898 | qh = ep->dqh; | |
899 | qh->next_dtd_ptr = 1; | |
900 | qh->size_ioc_int_sts = 0; | |
901 | } | |
902 | ||
903 | /* The request hasn't been processed, patch up the TD chain */ | |
904 | } else { | |
905 | struct mv_req *prev_req; | |
906 | ||
907 | prev_req = list_entry(req->queue.prev, struct mv_req, queue); | |
908 | writel(readl(&req->tail->dtd_next), | |
909 | &prev_req->tail->dtd_next); | |
910 | ||
911 | } | |
912 | ||
913 | done(ep, req, -ECONNRESET); | |
914 | ||
915 | /* Enable EP */ | |
916 | out: | |
917 | epctrlx = readl(&udc->op_regs->epctrlx[ep->ep_num]); | |
918 | if (ep_dir(ep) == EP_DIR_IN) | |
919 | epctrlx |= EPCTRL_TX_ENABLE; | |
920 | else | |
921 | epctrlx |= EPCTRL_RX_ENABLE; | |
922 | writel(epctrlx, &udc->op_regs->epctrlx[ep->ep_num]); | |
923 | ep->stopped = stopped; | |
924 | ||
925 | spin_unlock_irqrestore(&ep->udc->lock, flags); | |
926 | return ret; | |
927 | } | |
928 | ||
929 | static void ep_set_stall(struct mv_udc *udc, u8 ep_num, u8 direction, int stall) | |
930 | { | |
931 | u32 epctrlx; | |
932 | ||
933 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); | |
934 | ||
935 | if (stall) { | |
936 | if (direction == EP_DIR_IN) | |
937 | epctrlx |= EPCTRL_TX_EP_STALL; | |
938 | else | |
939 | epctrlx |= EPCTRL_RX_EP_STALL; | |
940 | } else { | |
941 | if (direction == EP_DIR_IN) { | |
942 | epctrlx &= ~EPCTRL_TX_EP_STALL; | |
943 | epctrlx |= EPCTRL_TX_DATA_TOGGLE_RST; | |
944 | } else { | |
945 | epctrlx &= ~EPCTRL_RX_EP_STALL; | |
946 | epctrlx |= EPCTRL_RX_DATA_TOGGLE_RST; | |
947 | } | |
948 | } | |
949 | writel(epctrlx, &udc->op_regs->epctrlx[ep_num]); | |
950 | } | |
951 | ||
952 | static int ep_is_stall(struct mv_udc *udc, u8 ep_num, u8 direction) | |
953 | { | |
954 | u32 epctrlx; | |
955 | ||
956 | epctrlx = readl(&udc->op_regs->epctrlx[ep_num]); | |
957 | ||
958 | if (direction == EP_DIR_OUT) | |
959 | return (epctrlx & EPCTRL_RX_EP_STALL) ? 1 : 0; | |
960 | else | |
961 | return (epctrlx & EPCTRL_TX_EP_STALL) ? 1 : 0; | |
962 | } | |
963 | ||
964 | static int mv_ep_set_halt_wedge(struct usb_ep *_ep, int halt, int wedge) | |
965 | { | |
966 | struct mv_ep *ep; | |
967 | unsigned long flags = 0; | |
968 | int status = 0; | |
969 | struct mv_udc *udc; | |
970 | ||
971 | ep = container_of(_ep, struct mv_ep, ep); | |
972 | udc = ep->udc; | |
973 | if (!_ep || !ep->desc) { | |
974 | status = -EINVAL; | |
975 | goto out; | |
976 | } | |
977 | ||
978 | if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) { | |
979 | status = -EOPNOTSUPP; | |
980 | goto out; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Attempt to halt IN ep will fail if any transfer requests | |
985 | * are still queue | |
986 | */ | |
987 | if (halt && (ep_dir(ep) == EP_DIR_IN) && !list_empty(&ep->queue)) { | |
988 | status = -EAGAIN; | |
989 | goto out; | |
990 | } | |
991 | ||
992 | spin_lock_irqsave(&ep->udc->lock, flags); | |
993 | ep_set_stall(udc, ep->ep_num, ep_dir(ep), halt); | |
994 | if (halt && wedge) | |
995 | ep->wedge = 1; | |
996 | else if (!halt) | |
997 | ep->wedge = 0; | |
998 | spin_unlock_irqrestore(&ep->udc->lock, flags); | |
999 | ||
1000 | if (ep->ep_num == 0) { | |
1001 | udc->ep0_state = WAIT_FOR_SETUP; | |
1002 | udc->ep0_dir = EP_DIR_OUT; | |
1003 | } | |
1004 | out: | |
1005 | return status; | |
1006 | } | |
1007 | ||
1008 | static int mv_ep_set_halt(struct usb_ep *_ep, int halt) | |
1009 | { | |
1010 | return mv_ep_set_halt_wedge(_ep, halt, 0); | |
1011 | } | |
1012 | ||
1013 | static int mv_ep_set_wedge(struct usb_ep *_ep) | |
1014 | { | |
1015 | return mv_ep_set_halt_wedge(_ep, 1, 1); | |
1016 | } | |
1017 | ||
1018 | static struct usb_ep_ops mv_ep_ops = { | |
1019 | .enable = mv_ep_enable, | |
1020 | .disable = mv_ep_disable, | |
1021 | ||
1022 | .alloc_request = mv_alloc_request, | |
1023 | .free_request = mv_free_request, | |
1024 | ||
1025 | .queue = mv_ep_queue, | |
1026 | .dequeue = mv_ep_dequeue, | |
1027 | ||
1028 | .set_wedge = mv_ep_set_wedge, | |
1029 | .set_halt = mv_ep_set_halt, | |
1030 | .fifo_flush = mv_ep_fifo_flush, /* flush fifo */ | |
1031 | }; | |
1032 | ||
dde34cc5 NZ |
1033 | static void udc_clock_enable(struct mv_udc *udc) |
1034 | { | |
1035 | unsigned int i; | |
1036 | ||
1037 | for (i = 0; i < udc->clknum; i++) | |
1038 | clk_enable(udc->clk[i]); | |
1039 | } | |
1040 | ||
1041 | static void udc_clock_disable(struct mv_udc *udc) | |
1042 | { | |
1043 | unsigned int i; | |
1044 | ||
1045 | for (i = 0; i < udc->clknum; i++) | |
1046 | clk_disable(udc->clk[i]); | |
1047 | } | |
1048 | ||
e7cddda4 | 1049 | static void udc_stop(struct mv_udc *udc) |
1050 | { | |
1051 | u32 tmp; | |
1052 | ||
1053 | /* Disable interrupts */ | |
1054 | tmp = readl(&udc->op_regs->usbintr); | |
1055 | tmp &= ~(USBINTR_INT_EN | USBINTR_ERR_INT_EN | | |
1056 | USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN); | |
1057 | writel(tmp, &udc->op_regs->usbintr); | |
1058 | ||
309d6d2b NZ |
1059 | udc->stopped = 1; |
1060 | ||
e7cddda4 | 1061 | /* Reset the Run the bit in the command register to stop VUSB */ |
1062 | tmp = readl(&udc->op_regs->usbcmd); | |
1063 | tmp &= ~USBCMD_RUN_STOP; | |
1064 | writel(tmp, &udc->op_regs->usbcmd); | |
1065 | } | |
1066 | ||
1067 | static void udc_start(struct mv_udc *udc) | |
1068 | { | |
1069 | u32 usbintr; | |
1070 | ||
1071 | usbintr = USBINTR_INT_EN | USBINTR_ERR_INT_EN | |
1072 | | USBINTR_PORT_CHANGE_DETECT_EN | |
1073 | | USBINTR_RESET_EN | USBINTR_DEVICE_SUSPEND; | |
1074 | /* Enable interrupts */ | |
1075 | writel(usbintr, &udc->op_regs->usbintr); | |
1076 | ||
309d6d2b NZ |
1077 | udc->stopped = 0; |
1078 | ||
e7cddda4 | 1079 | /* Set the Run bit in the command register */ |
1080 | writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd); | |
1081 | } | |
1082 | ||
1083 | static int udc_reset(struct mv_udc *udc) | |
1084 | { | |
1085 | unsigned int loops; | |
1086 | u32 tmp, portsc; | |
1087 | ||
1088 | /* Stop the controller */ | |
1089 | tmp = readl(&udc->op_regs->usbcmd); | |
1090 | tmp &= ~USBCMD_RUN_STOP; | |
1091 | writel(tmp, &udc->op_regs->usbcmd); | |
1092 | ||
1093 | /* Reset the controller to get default values */ | |
1094 | writel(USBCMD_CTRL_RESET, &udc->op_regs->usbcmd); | |
1095 | ||
1096 | /* wait for reset to complete */ | |
1097 | loops = LOOPS(RESET_TIMEOUT); | |
1098 | while (readl(&udc->op_regs->usbcmd) & USBCMD_CTRL_RESET) { | |
1099 | if (loops == 0) { | |
1100 | dev_err(&udc->dev->dev, | |
1101 | "Wait for RESET completed TIMEOUT\n"); | |
1102 | return -ETIMEDOUT; | |
1103 | } | |
1104 | loops--; | |
1105 | udelay(LOOPS_USEC); | |
1106 | } | |
1107 | ||
1108 | /* set controller to device mode */ | |
1109 | tmp = readl(&udc->op_regs->usbmode); | |
1110 | tmp |= USBMODE_CTRL_MODE_DEVICE; | |
1111 | ||
1112 | /* turn setup lockout off, require setup tripwire in usbcmd */ | |
1113 | tmp |= USBMODE_SETUP_LOCK_OFF | USBMODE_STREAM_DISABLE; | |
1114 | ||
1115 | writel(tmp, &udc->op_regs->usbmode); | |
1116 | ||
1117 | writel(0x0, &udc->op_regs->epsetupstat); | |
1118 | ||
1119 | /* Configure the Endpoint List Address */ | |
1120 | writel(udc->ep_dqh_dma & USB_EP_LIST_ADDRESS_MASK, | |
1121 | &udc->op_regs->eplistaddr); | |
1122 | ||
1123 | portsc = readl(&udc->op_regs->portsc[0]); | |
1124 | if (readl(&udc->cap_regs->hcsparams) & HCSPARAMS_PPC) | |
1125 | portsc &= (~PORTSCX_W1C_BITS | ~PORTSCX_PORT_POWER); | |
1126 | ||
1127 | if (udc->force_fs) | |
1128 | portsc |= PORTSCX_FORCE_FULL_SPEED_CONNECT; | |
1129 | else | |
1130 | portsc &= (~PORTSCX_FORCE_FULL_SPEED_CONNECT); | |
1131 | ||
1132 | writel(portsc, &udc->op_regs->portsc[0]); | |
1133 | ||
1134 | tmp = readl(&udc->op_regs->epctrlx[0]); | |
1135 | tmp &= ~(EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL); | |
1136 | writel(tmp, &udc->op_regs->epctrlx[0]); | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
85ff7bfb | 1141 | static int mv_udc_enable_internal(struct mv_udc *udc) |
1aec033b NZ |
1142 | { |
1143 | int retval; | |
1144 | ||
85ff7bfb | 1145 | if (udc->active) |
1aec033b NZ |
1146 | return 0; |
1147 | ||
1148 | dev_dbg(&udc->dev->dev, "enable udc\n"); | |
1149 | udc_clock_enable(udc); | |
1150 | if (udc->pdata->phy_init) { | |
1151 | retval = udc->pdata->phy_init(udc->phy_regs); | |
1152 | if (retval) { | |
1153 | dev_err(&udc->dev->dev, | |
1154 | "init phy error %d\n", retval); | |
1155 | udc_clock_disable(udc); | |
1156 | return retval; | |
1157 | } | |
1158 | } | |
1159 | udc->active = 1; | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
85ff7bfb | 1164 | static int mv_udc_enable(struct mv_udc *udc) |
1aec033b | 1165 | { |
85ff7bfb NZ |
1166 | if (udc->clock_gating) |
1167 | return mv_udc_enable_internal(udc); | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static void mv_udc_disable_internal(struct mv_udc *udc) | |
1173 | { | |
1174 | if (udc->active) { | |
1aec033b NZ |
1175 | dev_dbg(&udc->dev->dev, "disable udc\n"); |
1176 | if (udc->pdata->phy_deinit) | |
1177 | udc->pdata->phy_deinit(udc->phy_regs); | |
1178 | udc_clock_disable(udc); | |
1179 | udc->active = 0; | |
1180 | } | |
1181 | } | |
1182 | ||
85ff7bfb NZ |
1183 | static void mv_udc_disable(struct mv_udc *udc) |
1184 | { | |
1185 | if (udc->clock_gating) | |
1186 | mv_udc_disable_internal(udc); | |
1187 | } | |
1188 | ||
e7cddda4 | 1189 | static int mv_udc_get_frame(struct usb_gadget *gadget) |
1190 | { | |
1191 | struct mv_udc *udc; | |
1192 | u16 retval; | |
1193 | ||
1194 | if (!gadget) | |
1195 | return -ENODEV; | |
1196 | ||
1197 | udc = container_of(gadget, struct mv_udc, gadget); | |
1198 | ||
86bb7028 | 1199 | retval = readl(&udc->op_regs->frindex) & USB_FRINDEX_MASKS; |
e7cddda4 | 1200 | |
1201 | return retval; | |
1202 | } | |
1203 | ||
1204 | /* Tries to wake up the host connected to this gadget */ | |
1205 | static int mv_udc_wakeup(struct usb_gadget *gadget) | |
1206 | { | |
1207 | struct mv_udc *udc = container_of(gadget, struct mv_udc, gadget); | |
1208 | u32 portsc; | |
1209 | ||
1210 | /* Remote wakeup feature not enabled by host */ | |
1211 | if (!udc->remote_wakeup) | |
1212 | return -ENOTSUPP; | |
1213 | ||
1214 | portsc = readl(&udc->op_regs->portsc); | |
1215 | /* not suspended? */ | |
1216 | if (!(portsc & PORTSCX_PORT_SUSPEND)) | |
1217 | return 0; | |
1218 | /* trigger force resume */ | |
1219 | portsc |= PORTSCX_PORT_FORCE_RESUME; | |
1220 | writel(portsc, &udc->op_regs->portsc[0]); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1aec033b NZ |
1224 | static int mv_udc_vbus_session(struct usb_gadget *gadget, int is_active) |
1225 | { | |
1226 | struct mv_udc *udc; | |
1227 | unsigned long flags; | |
1228 | int retval = 0; | |
1229 | ||
1230 | udc = container_of(gadget, struct mv_udc, gadget); | |
1231 | spin_lock_irqsave(&udc->lock, flags); | |
1232 | ||
2bcb7514 NZ |
1233 | udc->vbus_active = (is_active != 0); |
1234 | ||
1aec033b NZ |
1235 | dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n", |
1236 | __func__, udc->softconnect, udc->vbus_active); | |
1237 | ||
1aec033b NZ |
1238 | if (udc->driver && udc->softconnect && udc->vbus_active) { |
1239 | retval = mv_udc_enable(udc); | |
1240 | if (retval == 0) { | |
1241 | /* Clock is disabled, need re-init registers */ | |
1242 | udc_reset(udc); | |
1243 | ep0_reset(udc); | |
1244 | udc_start(udc); | |
1245 | } | |
1246 | } else if (udc->driver && udc->softconnect) { | |
1247 | /* stop all the transfer in queue*/ | |
1248 | stop_activity(udc, udc->driver); | |
1249 | udc_stop(udc); | |
1250 | mv_udc_disable(udc); | |
1251 | } | |
1252 | ||
1253 | spin_unlock_irqrestore(&udc->lock, flags); | |
1254 | return retval; | |
1255 | } | |
1256 | ||
e7cddda4 | 1257 | static int mv_udc_pullup(struct usb_gadget *gadget, int is_on) |
1258 | { | |
1259 | struct mv_udc *udc; | |
1260 | unsigned long flags; | |
1aec033b | 1261 | int retval = 0; |
e7cddda4 | 1262 | |
1263 | udc = container_of(gadget, struct mv_udc, gadget); | |
1264 | spin_lock_irqsave(&udc->lock, flags); | |
1265 | ||
2bcb7514 NZ |
1266 | udc->softconnect = (is_on != 0); |
1267 | ||
1aec033b NZ |
1268 | dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n", |
1269 | __func__, udc->softconnect, udc->vbus_active); | |
1270 | ||
1aec033b NZ |
1271 | if (udc->driver && udc->softconnect && udc->vbus_active) { |
1272 | retval = mv_udc_enable(udc); | |
1273 | if (retval == 0) { | |
1274 | /* Clock is disabled, need re-init registers */ | |
1275 | udc_reset(udc); | |
1276 | ep0_reset(udc); | |
1277 | udc_start(udc); | |
1278 | } | |
1279 | } else if (udc->driver && udc->vbus_active) { | |
1280 | /* stop all the transfer in queue*/ | |
1281 | stop_activity(udc, udc->driver); | |
e7cddda4 | 1282 | udc_stop(udc); |
1aec033b NZ |
1283 | mv_udc_disable(udc); |
1284 | } | |
e7cddda4 | 1285 | |
1286 | spin_unlock_irqrestore(&udc->lock, flags); | |
1aec033b | 1287 | return retval; |
e7cddda4 | 1288 | } |
1289 | ||
0f91349b SAS |
1290 | static int mv_udc_start(struct usb_gadget_driver *driver, |
1291 | int (*bind)(struct usb_gadget *)); | |
1292 | static int mv_udc_stop(struct usb_gadget_driver *driver); | |
e7cddda4 | 1293 | /* device controller usb_gadget_ops structure */ |
1294 | static const struct usb_gadget_ops mv_ops = { | |
1295 | ||
1296 | /* returns the current frame number */ | |
1297 | .get_frame = mv_udc_get_frame, | |
1298 | ||
1299 | /* tries to wake up the host connected to this gadget */ | |
1300 | .wakeup = mv_udc_wakeup, | |
1301 | ||
1aec033b NZ |
1302 | /* notify controller that VBUS is powered or not */ |
1303 | .vbus_session = mv_udc_vbus_session, | |
1304 | ||
e7cddda4 | 1305 | /* D+ pullup, software-controlled connect/disconnect to USB host */ |
1306 | .pullup = mv_udc_pullup, | |
0f91349b SAS |
1307 | .start = mv_udc_start, |
1308 | .stop = mv_udc_stop, | |
e7cddda4 | 1309 | }; |
1310 | ||
e7cddda4 | 1311 | static int eps_init(struct mv_udc *udc) |
1312 | { | |
1313 | struct mv_ep *ep; | |
1314 | char name[14]; | |
1315 | int i; | |
1316 | ||
1317 | /* initialize ep0 */ | |
1318 | ep = &udc->eps[0]; | |
1319 | ep->udc = udc; | |
1320 | strncpy(ep->name, "ep0", sizeof(ep->name)); | |
1321 | ep->ep.name = ep->name; | |
1322 | ep->ep.ops = &mv_ep_ops; | |
1323 | ep->wedge = 0; | |
1324 | ep->stopped = 0; | |
1325 | ep->ep.maxpacket = EP0_MAX_PKT_SIZE; | |
1326 | ep->ep_num = 0; | |
1327 | ep->desc = &mv_ep0_desc; | |
1328 | INIT_LIST_HEAD(&ep->queue); | |
1329 | ||
1330 | ep->ep_type = USB_ENDPOINT_XFER_CONTROL; | |
1331 | ||
1332 | /* initialize other endpoints */ | |
1333 | for (i = 2; i < udc->max_eps * 2; i++) { | |
1334 | ep = &udc->eps[i]; | |
1335 | if (i % 2) { | |
1336 | snprintf(name, sizeof(name), "ep%din", i / 2); | |
1337 | ep->direction = EP_DIR_IN; | |
1338 | } else { | |
1339 | snprintf(name, sizeof(name), "ep%dout", i / 2); | |
1340 | ep->direction = EP_DIR_OUT; | |
1341 | } | |
1342 | ep->udc = udc; | |
1343 | strncpy(ep->name, name, sizeof(ep->name)); | |
1344 | ep->ep.name = ep->name; | |
1345 | ||
1346 | ep->ep.ops = &mv_ep_ops; | |
1347 | ep->stopped = 0; | |
1348 | ep->ep.maxpacket = (unsigned short) ~0; | |
1349 | ep->ep_num = i / 2; | |
1350 | ||
1351 | INIT_LIST_HEAD(&ep->queue); | |
1352 | list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); | |
1353 | ||
1354 | ep->dqh = &udc->ep_dqh[i]; | |
1355 | } | |
1356 | ||
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | /* delete all endpoint requests, called with spinlock held */ | |
1361 | static void nuke(struct mv_ep *ep, int status) | |
1362 | { | |
1363 | /* called with spinlock held */ | |
1364 | ep->stopped = 1; | |
1365 | ||
1366 | /* endpoint fifo flush */ | |
1367 | mv_ep_fifo_flush(&ep->ep); | |
1368 | ||
1369 | while (!list_empty(&ep->queue)) { | |
1370 | struct mv_req *req = NULL; | |
1371 | req = list_entry(ep->queue.next, struct mv_req, queue); | |
1372 | done(ep, req, status); | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | /* stop all USB activities */ | |
1377 | static void stop_activity(struct mv_udc *udc, struct usb_gadget_driver *driver) | |
1378 | { | |
1379 | struct mv_ep *ep; | |
1380 | ||
1381 | nuke(&udc->eps[0], -ESHUTDOWN); | |
1382 | ||
1383 | list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { | |
1384 | nuke(ep, -ESHUTDOWN); | |
1385 | } | |
1386 | ||
1387 | /* report disconnect; the driver is already quiesced */ | |
1388 | if (driver) { | |
1389 | spin_unlock(&udc->lock); | |
1390 | driver->disconnect(&udc->gadget); | |
1391 | spin_lock(&udc->lock); | |
1392 | } | |
1393 | } | |
1394 | ||
0f91349b | 1395 | static int mv_udc_start(struct usb_gadget_driver *driver, |
e7cddda4 | 1396 | int (*bind)(struct usb_gadget *)) |
1397 | { | |
1398 | struct mv_udc *udc = the_controller; | |
1399 | int retval = 0; | |
1400 | unsigned long flags; | |
1401 | ||
1402 | if (!udc) | |
1403 | return -ENODEV; | |
1404 | ||
1405 | if (udc->driver) | |
1406 | return -EBUSY; | |
1407 | ||
1408 | spin_lock_irqsave(&udc->lock, flags); | |
1409 | ||
1410 | /* hook up the driver ... */ | |
1411 | driver->driver.bus = NULL; | |
1412 | udc->driver = driver; | |
1413 | udc->gadget.dev.driver = &driver->driver; | |
1414 | ||
1415 | udc->usb_state = USB_STATE_ATTACHED; | |
1416 | udc->ep0_state = WAIT_FOR_SETUP; | |
1aec033b | 1417 | udc->ep0_dir = EP_DIR_OUT; |
e7cddda4 | 1418 | |
1419 | spin_unlock_irqrestore(&udc->lock, flags); | |
1420 | ||
1421 | retval = bind(&udc->gadget); | |
1422 | if (retval) { | |
1423 | dev_err(&udc->dev->dev, "bind to driver %s --> %d\n", | |
1424 | driver->driver.name, retval); | |
1425 | udc->driver = NULL; | |
1426 | udc->gadget.dev.driver = NULL; | |
1427 | return retval; | |
1428 | } | |
1aec033b | 1429 | |
487d54d1 NZ |
1430 | if (udc->transceiver) { |
1431 | retval = otg_set_peripheral(udc->transceiver, &udc->gadget); | |
1432 | if (retval) { | |
1433 | dev_err(&udc->dev->dev, | |
1434 | "unable to register peripheral to otg\n"); | |
1435 | if (driver->unbind) { | |
1436 | driver->unbind(&udc->gadget); | |
1437 | udc->gadget.dev.driver = NULL; | |
1438 | udc->driver = NULL; | |
1439 | } | |
1440 | return retval; | |
1441 | } | |
1442 | } | |
1443 | ||
1aec033b NZ |
1444 | /* pullup is always on */ |
1445 | mv_udc_pullup(&udc->gadget, 1); | |
1446 | ||
1447 | /* When boot with cable attached, there will be no vbus irq occurred */ | |
1448 | if (udc->qwork) | |
1449 | queue_work(udc->qwork, &udc->vbus_work); | |
e7cddda4 | 1450 | |
1451 | return 0; | |
1452 | } | |
e7cddda4 | 1453 | |
0f91349b | 1454 | static int mv_udc_stop(struct usb_gadget_driver *driver) |
e7cddda4 | 1455 | { |
1456 | struct mv_udc *udc = the_controller; | |
1457 | unsigned long flags; | |
1458 | ||
1459 | if (!udc) | |
1460 | return -ENODEV; | |
1461 | ||
e7cddda4 | 1462 | spin_lock_irqsave(&udc->lock, flags); |
1463 | ||
1aec033b NZ |
1464 | mv_udc_enable(udc); |
1465 | udc_stop(udc); | |
1466 | ||
e7cddda4 | 1467 | /* stop all usb activities */ |
1468 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
1469 | stop_activity(udc, driver); | |
1aec033b NZ |
1470 | mv_udc_disable(udc); |
1471 | ||
e7cddda4 | 1472 | spin_unlock_irqrestore(&udc->lock, flags); |
1473 | ||
1474 | /* unbind gadget driver */ | |
1475 | driver->unbind(&udc->gadget); | |
1476 | udc->gadget.dev.driver = NULL; | |
1477 | udc->driver = NULL; | |
1478 | ||
1479 | return 0; | |
1480 | } | |
e7cddda4 | 1481 | |
fb22cbac NZ |
1482 | static void mv_set_ptc(struct mv_udc *udc, u32 mode) |
1483 | { | |
1484 | u32 portsc; | |
1485 | ||
1486 | portsc = readl(&udc->op_regs->portsc[0]); | |
1487 | portsc |= mode << 16; | |
1488 | writel(portsc, &udc->op_regs->portsc[0]); | |
1489 | } | |
1490 | ||
1491 | static void prime_status_complete(struct usb_ep *ep, struct usb_request *_req) | |
1492 | { | |
1493 | struct mv_udc *udc = the_controller; | |
1494 | struct mv_req *req = container_of(_req, struct mv_req, req); | |
1495 | unsigned long flags; | |
1496 | ||
1497 | dev_info(&udc->dev->dev, "switch to test mode %d\n", req->test_mode); | |
1498 | ||
1499 | spin_lock_irqsave(&udc->lock, flags); | |
1500 | if (req->test_mode) { | |
1501 | mv_set_ptc(udc, req->test_mode); | |
1502 | req->test_mode = 0; | |
1503 | } | |
1504 | spin_unlock_irqrestore(&udc->lock, flags); | |
1505 | } | |
1506 | ||
e7cddda4 | 1507 | static int |
1508 | udc_prime_status(struct mv_udc *udc, u8 direction, u16 status, bool empty) | |
1509 | { | |
1510 | int retval = 0; | |
1511 | struct mv_req *req; | |
1512 | struct mv_ep *ep; | |
1513 | ||
1514 | ep = &udc->eps[0]; | |
1515 | udc->ep0_dir = direction; | |
36616224 | 1516 | udc->ep0_state = WAIT_FOR_OUT_STATUS; |
e7cddda4 | 1517 | |
1518 | req = udc->status_req; | |
1519 | ||
1520 | /* fill in the reqest structure */ | |
1521 | if (empty == false) { | |
1522 | *((u16 *) req->req.buf) = cpu_to_le16(status); | |
1523 | req->req.length = 2; | |
1524 | } else | |
1525 | req->req.length = 0; | |
1526 | ||
1527 | req->ep = ep; | |
1528 | req->req.status = -EINPROGRESS; | |
1529 | req->req.actual = 0; | |
fb22cbac NZ |
1530 | if (udc->test_mode) { |
1531 | req->req.complete = prime_status_complete; | |
1532 | req->test_mode = udc->test_mode; | |
1533 | udc->test_mode = 0; | |
1534 | } else | |
1535 | req->req.complete = NULL; | |
e7cddda4 | 1536 | req->dtd_count = 0; |
1537 | ||
46e172df NZ |
1538 | if (req->req.dma == DMA_ADDR_INVALID) { |
1539 | req->req.dma = dma_map_single(ep->udc->gadget.dev.parent, | |
1540 | req->req.buf, req->req.length, | |
1541 | ep_dir(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
1542 | req->mapped = 1; | |
1543 | } | |
1544 | ||
e7cddda4 | 1545 | /* prime the data phase */ |
1546 | if (!req_to_dtd(req)) | |
1547 | retval = queue_dtd(ep, req); | |
1548 | else{ /* no mem */ | |
1549 | retval = -ENOMEM; | |
1550 | goto out; | |
1551 | } | |
1552 | ||
1553 | if (retval) { | |
1554 | dev_err(&udc->dev->dev, "response error on GET_STATUS request\n"); | |
1555 | goto out; | |
1556 | } | |
1557 | ||
1558 | list_add_tail(&req->queue, &ep->queue); | |
1559 | ||
1560 | return 0; | |
1561 | out: | |
1562 | return retval; | |
1563 | } | |
1564 | ||
fb22cbac NZ |
1565 | static void mv_udc_testmode(struct mv_udc *udc, u16 index) |
1566 | { | |
1567 | if (index <= TEST_FORCE_EN) { | |
1568 | udc->test_mode = index; | |
1569 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) | |
1570 | ep0_stall(udc); | |
1571 | } else | |
1572 | dev_err(&udc->dev->dev, | |
1573 | "This test mode(%d) is not supported\n", index); | |
1574 | } | |
1575 | ||
e7cddda4 | 1576 | static void ch9setaddress(struct mv_udc *udc, struct usb_ctrlrequest *setup) |
1577 | { | |
1578 | udc->dev_addr = (u8)setup->wValue; | |
1579 | ||
1580 | /* update usb state */ | |
1581 | udc->usb_state = USB_STATE_ADDRESS; | |
1582 | ||
1583 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) | |
1584 | ep0_stall(udc); | |
1585 | } | |
1586 | ||
1587 | static void ch9getstatus(struct mv_udc *udc, u8 ep_num, | |
1588 | struct usb_ctrlrequest *setup) | |
1589 | { | |
431879a7 | 1590 | u16 status = 0; |
e7cddda4 | 1591 | int retval; |
1592 | ||
1593 | if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) | |
1594 | != (USB_DIR_IN | USB_TYPE_STANDARD)) | |
1595 | return; | |
1596 | ||
1597 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { | |
1598 | status = 1 << USB_DEVICE_SELF_POWERED; | |
1599 | status |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP; | |
1600 | } else if ((setup->bRequestType & USB_RECIP_MASK) | |
1601 | == USB_RECIP_INTERFACE) { | |
1602 | /* get interface status */ | |
1603 | status = 0; | |
1604 | } else if ((setup->bRequestType & USB_RECIP_MASK) | |
1605 | == USB_RECIP_ENDPOINT) { | |
1606 | u8 ep_num, direction; | |
1607 | ||
1608 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; | |
1609 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) | |
1610 | ? EP_DIR_IN : EP_DIR_OUT; | |
1611 | status = ep_is_stall(udc, ep_num, direction) | |
1612 | << USB_ENDPOINT_HALT; | |
1613 | } | |
1614 | ||
1615 | retval = udc_prime_status(udc, EP_DIR_IN, status, false); | |
1616 | if (retval) | |
1617 | ep0_stall(udc); | |
36616224 NZ |
1618 | else |
1619 | udc->ep0_state = DATA_STATE_XMIT; | |
e7cddda4 | 1620 | } |
1621 | ||
1622 | static void ch9clearfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) | |
1623 | { | |
1624 | u8 ep_num; | |
1625 | u8 direction; | |
1626 | struct mv_ep *ep; | |
1627 | ||
1628 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) | |
1629 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { | |
1630 | switch (setup->wValue) { | |
1631 | case USB_DEVICE_REMOTE_WAKEUP: | |
1632 | udc->remote_wakeup = 0; | |
1633 | break; | |
e7cddda4 | 1634 | default: |
1635 | goto out; | |
1636 | } | |
1637 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) | |
1638 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { | |
1639 | switch (setup->wValue) { | |
1640 | case USB_ENDPOINT_HALT: | |
1641 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; | |
1642 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) | |
1643 | ? EP_DIR_IN : EP_DIR_OUT; | |
1644 | if (setup->wValue != 0 || setup->wLength != 0 | |
1645 | || ep_num > udc->max_eps) | |
1646 | goto out; | |
1647 | ep = &udc->eps[ep_num * 2 + direction]; | |
1648 | if (ep->wedge == 1) | |
1649 | break; | |
1650 | spin_unlock(&udc->lock); | |
1651 | ep_set_stall(udc, ep_num, direction, 0); | |
1652 | spin_lock(&udc->lock); | |
1653 | break; | |
1654 | default: | |
1655 | goto out; | |
1656 | } | |
1657 | } else | |
1658 | goto out; | |
1659 | ||
1660 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) | |
1661 | ep0_stall(udc); | |
e7cddda4 | 1662 | out: |
1663 | return; | |
1664 | } | |
1665 | ||
1666 | static void ch9setfeature(struct mv_udc *udc, struct usb_ctrlrequest *setup) | |
1667 | { | |
1668 | u8 ep_num; | |
1669 | u8 direction; | |
1670 | ||
1671 | if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) | |
1672 | == ((USB_TYPE_STANDARD | USB_RECIP_DEVICE))) { | |
1673 | switch (setup->wValue) { | |
1674 | case USB_DEVICE_REMOTE_WAKEUP: | |
1675 | udc->remote_wakeup = 1; | |
1676 | break; | |
1677 | case USB_DEVICE_TEST_MODE: | |
1678 | if (setup->wIndex & 0xFF | |
fb22cbac NZ |
1679 | || udc->gadget.speed != USB_SPEED_HIGH) |
1680 | ep0_stall(udc); | |
1681 | ||
1682 | if (udc->usb_state != USB_STATE_CONFIGURED | |
1683 | && udc->usb_state != USB_STATE_ADDRESS | |
1684 | && udc->usb_state != USB_STATE_DEFAULT) | |
1685 | ep0_stall(udc); | |
1686 | ||
1687 | mv_udc_testmode(udc, (setup->wIndex >> 8)); | |
1688 | goto out; | |
e7cddda4 | 1689 | default: |
1690 | goto out; | |
1691 | } | |
1692 | } else if ((setup->bRequestType & (USB_TYPE_MASK | USB_RECIP_MASK)) | |
1693 | == ((USB_TYPE_STANDARD | USB_RECIP_ENDPOINT))) { | |
1694 | switch (setup->wValue) { | |
1695 | case USB_ENDPOINT_HALT: | |
1696 | ep_num = setup->wIndex & USB_ENDPOINT_NUMBER_MASK; | |
1697 | direction = (setup->wIndex & USB_ENDPOINT_DIR_MASK) | |
1698 | ? EP_DIR_IN : EP_DIR_OUT; | |
1699 | if (setup->wValue != 0 || setup->wLength != 0 | |
1700 | || ep_num > udc->max_eps) | |
1701 | goto out; | |
1702 | spin_unlock(&udc->lock); | |
1703 | ep_set_stall(udc, ep_num, direction, 1); | |
1704 | spin_lock(&udc->lock); | |
1705 | break; | |
1706 | default: | |
1707 | goto out; | |
1708 | } | |
1709 | } else | |
1710 | goto out; | |
1711 | ||
1712 | if (udc_prime_status(udc, EP_DIR_IN, 0, true)) | |
1713 | ep0_stall(udc); | |
1714 | out: | |
1715 | return; | |
1716 | } | |
1717 | ||
1718 | static void handle_setup_packet(struct mv_udc *udc, u8 ep_num, | |
1719 | struct usb_ctrlrequest *setup) | |
1720 | { | |
1721 | bool delegate = false; | |
1722 | ||
1723 | nuke(&udc->eps[ep_num * 2 + EP_DIR_OUT], -ESHUTDOWN); | |
1724 | ||
1725 | dev_dbg(&udc->dev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", | |
1726 | setup->bRequestType, setup->bRequest, | |
1727 | setup->wValue, setup->wIndex, setup->wLength); | |
1728 | /* We process some stardard setup requests here */ | |
1729 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1730 | switch (setup->bRequest) { | |
1731 | case USB_REQ_GET_STATUS: | |
1732 | ch9getstatus(udc, ep_num, setup); | |
1733 | break; | |
1734 | ||
1735 | case USB_REQ_SET_ADDRESS: | |
1736 | ch9setaddress(udc, setup); | |
1737 | break; | |
1738 | ||
1739 | case USB_REQ_CLEAR_FEATURE: | |
1740 | ch9clearfeature(udc, setup); | |
1741 | break; | |
1742 | ||
1743 | case USB_REQ_SET_FEATURE: | |
1744 | ch9setfeature(udc, setup); | |
1745 | break; | |
1746 | ||
1747 | default: | |
1748 | delegate = true; | |
1749 | } | |
1750 | } else | |
1751 | delegate = true; | |
1752 | ||
1753 | /* delegate USB standard requests to the gadget driver */ | |
1754 | if (delegate == true) { | |
1755 | /* USB requests handled by gadget */ | |
1756 | if (setup->wLength) { | |
1757 | /* DATA phase from gadget, STATUS phase from udc */ | |
1758 | udc->ep0_dir = (setup->bRequestType & USB_DIR_IN) | |
1759 | ? EP_DIR_IN : EP_DIR_OUT; | |
1760 | spin_unlock(&udc->lock); | |
1761 | if (udc->driver->setup(&udc->gadget, | |
1762 | &udc->local_setup_buff) < 0) | |
1763 | ep0_stall(udc); | |
1764 | spin_lock(&udc->lock); | |
1765 | udc->ep0_state = (setup->bRequestType & USB_DIR_IN) | |
1766 | ? DATA_STATE_XMIT : DATA_STATE_RECV; | |
1767 | } else { | |
1768 | /* no DATA phase, IN STATUS phase from gadget */ | |
1769 | udc->ep0_dir = EP_DIR_IN; | |
1770 | spin_unlock(&udc->lock); | |
1771 | if (udc->driver->setup(&udc->gadget, | |
1772 | &udc->local_setup_buff) < 0) | |
1773 | ep0_stall(udc); | |
1774 | spin_lock(&udc->lock); | |
1775 | udc->ep0_state = WAIT_FOR_OUT_STATUS; | |
1776 | } | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | /* complete DATA or STATUS phase of ep0 prime status phase if needed */ | |
1781 | static void ep0_req_complete(struct mv_udc *udc, | |
1782 | struct mv_ep *ep0, struct mv_req *req) | |
1783 | { | |
1784 | u32 new_addr; | |
1785 | ||
1786 | if (udc->usb_state == USB_STATE_ADDRESS) { | |
1787 | /* set the new address */ | |
1788 | new_addr = (u32)udc->dev_addr; | |
1789 | writel(new_addr << USB_DEVICE_ADDRESS_BIT_SHIFT, | |
1790 | &udc->op_regs->deviceaddr); | |
1791 | } | |
1792 | ||
1793 | done(ep0, req, 0); | |
1794 | ||
1795 | switch (udc->ep0_state) { | |
1796 | case DATA_STATE_XMIT: | |
1797 | /* receive status phase */ | |
1798 | if (udc_prime_status(udc, EP_DIR_OUT, 0, true)) | |
1799 | ep0_stall(udc); | |
1800 | break; | |
1801 | case DATA_STATE_RECV: | |
1802 | /* send status phase */ | |
1803 | if (udc_prime_status(udc, EP_DIR_IN, 0 , true)) | |
1804 | ep0_stall(udc); | |
1805 | break; | |
1806 | case WAIT_FOR_OUT_STATUS: | |
1807 | udc->ep0_state = WAIT_FOR_SETUP; | |
1808 | break; | |
1809 | case WAIT_FOR_SETUP: | |
1810 | dev_err(&udc->dev->dev, "unexpect ep0 packets\n"); | |
1811 | break; | |
1812 | default: | |
1813 | ep0_stall(udc); | |
1814 | break; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | static void get_setup_data(struct mv_udc *udc, u8 ep_num, u8 *buffer_ptr) | |
1819 | { | |
1820 | u32 temp; | |
1821 | struct mv_dqh *dqh; | |
1822 | ||
1823 | dqh = &udc->ep_dqh[ep_num * 2 + EP_DIR_OUT]; | |
1824 | ||
1825 | /* Clear bit in ENDPTSETUPSTAT */ | |
96c2bbb0 | 1826 | writel((1 << ep_num), &udc->op_regs->epsetupstat); |
e7cddda4 | 1827 | |
1828 | /* while a hazard exists when setup package arrives */ | |
1829 | do { | |
1830 | /* Set Setup Tripwire */ | |
1831 | temp = readl(&udc->op_regs->usbcmd); | |
1832 | writel(temp | USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); | |
1833 | ||
1834 | /* Copy the setup packet to local buffer */ | |
1835 | memcpy(buffer_ptr, (u8 *) dqh->setup_buffer, 8); | |
1836 | } while (!(readl(&udc->op_regs->usbcmd) & USBCMD_SETUP_TRIPWIRE_SET)); | |
1837 | ||
1838 | /* Clear Setup Tripwire */ | |
1839 | temp = readl(&udc->op_regs->usbcmd); | |
1840 | writel(temp & ~USBCMD_SETUP_TRIPWIRE_SET, &udc->op_regs->usbcmd); | |
1841 | } | |
1842 | ||
1843 | static void irq_process_tr_complete(struct mv_udc *udc) | |
1844 | { | |
1845 | u32 tmp, bit_pos; | |
1846 | int i, ep_num = 0, direction = 0; | |
1847 | struct mv_ep *curr_ep; | |
1848 | struct mv_req *curr_req, *temp_req; | |
1849 | int status; | |
1850 | ||
1851 | /* | |
1852 | * We use separate loops for ENDPTSETUPSTAT and ENDPTCOMPLETE | |
1853 | * because the setup packets are to be read ASAP | |
1854 | */ | |
1855 | ||
1856 | /* Process all Setup packet received interrupts */ | |
1857 | tmp = readl(&udc->op_regs->epsetupstat); | |
1858 | ||
1859 | if (tmp) { | |
1860 | for (i = 0; i < udc->max_eps; i++) { | |
1861 | if (tmp & (1 << i)) { | |
1862 | get_setup_data(udc, i, | |
1863 | (u8 *)(&udc->local_setup_buff)); | |
1864 | handle_setup_packet(udc, i, | |
1865 | &udc->local_setup_buff); | |
1866 | } | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | /* Don't clear the endpoint setup status register here. | |
1871 | * It is cleared as a setup packet is read out of the buffer | |
1872 | */ | |
1873 | ||
1874 | /* Process non-setup transaction complete interrupts */ | |
1875 | tmp = readl(&udc->op_regs->epcomplete); | |
1876 | ||
1877 | if (!tmp) | |
1878 | return; | |
1879 | ||
1880 | writel(tmp, &udc->op_regs->epcomplete); | |
1881 | ||
1882 | for (i = 0; i < udc->max_eps * 2; i++) { | |
1883 | ep_num = i >> 1; | |
1884 | direction = i % 2; | |
1885 | ||
1886 | bit_pos = 1 << (ep_num + 16 * direction); | |
1887 | ||
1888 | if (!(bit_pos & tmp)) | |
1889 | continue; | |
1890 | ||
1891 | if (i == 1) | |
1892 | curr_ep = &udc->eps[0]; | |
1893 | else | |
1894 | curr_ep = &udc->eps[i]; | |
1895 | /* process the req queue until an uncomplete request */ | |
1896 | list_for_each_entry_safe(curr_req, temp_req, | |
1897 | &curr_ep->queue, queue) { | |
1898 | status = process_ep_req(udc, i, curr_req); | |
1899 | if (status) | |
1900 | break; | |
1901 | ||
1902 | /* write back status to req */ | |
1903 | curr_req->req.status = status; | |
1904 | ||
1905 | /* ep0 request completion */ | |
1906 | if (ep_num == 0) { | |
1907 | ep0_req_complete(udc, curr_ep, curr_req); | |
1908 | break; | |
1909 | } else { | |
1910 | done(curr_ep, curr_req, status); | |
1911 | } | |
1912 | } | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | void irq_process_reset(struct mv_udc *udc) | |
1917 | { | |
1918 | u32 tmp; | |
1919 | unsigned int loops; | |
1920 | ||
1921 | udc->ep0_dir = EP_DIR_OUT; | |
1922 | udc->ep0_state = WAIT_FOR_SETUP; | |
1923 | udc->remote_wakeup = 0; /* default to 0 on reset */ | |
1924 | ||
1925 | /* The address bits are past bit 25-31. Set the address */ | |
1926 | tmp = readl(&udc->op_regs->deviceaddr); | |
1927 | tmp &= ~(USB_DEVICE_ADDRESS_MASK); | |
1928 | writel(tmp, &udc->op_regs->deviceaddr); | |
1929 | ||
1930 | /* Clear all the setup token semaphores */ | |
1931 | tmp = readl(&udc->op_regs->epsetupstat); | |
1932 | writel(tmp, &udc->op_regs->epsetupstat); | |
1933 | ||
1934 | /* Clear all the endpoint complete status bits */ | |
1935 | tmp = readl(&udc->op_regs->epcomplete); | |
1936 | writel(tmp, &udc->op_regs->epcomplete); | |
1937 | ||
1938 | /* wait until all endptprime bits cleared */ | |
1939 | loops = LOOPS(PRIME_TIMEOUT); | |
1940 | while (readl(&udc->op_regs->epprime) & 0xFFFFFFFF) { | |
1941 | if (loops == 0) { | |
1942 | dev_err(&udc->dev->dev, | |
1943 | "Timeout for ENDPTPRIME = 0x%x\n", | |
1944 | readl(&udc->op_regs->epprime)); | |
1945 | break; | |
1946 | } | |
1947 | loops--; | |
1948 | udelay(LOOPS_USEC); | |
1949 | } | |
1950 | ||
1951 | /* Write 1s to the Flush register */ | |
1952 | writel((u32)~0, &udc->op_regs->epflush); | |
1953 | ||
1954 | if (readl(&udc->op_regs->portsc[0]) & PORTSCX_PORT_RESET) { | |
1955 | dev_info(&udc->dev->dev, "usb bus reset\n"); | |
1956 | udc->usb_state = USB_STATE_DEFAULT; | |
1957 | /* reset all the queues, stop all USB activities */ | |
1958 | stop_activity(udc, udc->driver); | |
1959 | } else { | |
1960 | dev_info(&udc->dev->dev, "USB reset portsc 0x%x\n", | |
1961 | readl(&udc->op_regs->portsc)); | |
1962 | ||
1963 | /* | |
1964 | * re-initialize | |
1965 | * controller reset | |
1966 | */ | |
1967 | udc_reset(udc); | |
1968 | ||
1969 | /* reset all the queues, stop all USB activities */ | |
1970 | stop_activity(udc, udc->driver); | |
1971 | ||
1972 | /* reset ep0 dQH and endptctrl */ | |
1973 | ep0_reset(udc); | |
1974 | ||
1975 | /* enable interrupt and set controller to run state */ | |
1976 | udc_start(udc); | |
1977 | ||
1978 | udc->usb_state = USB_STATE_ATTACHED; | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | static void handle_bus_resume(struct mv_udc *udc) | |
1983 | { | |
1984 | udc->usb_state = udc->resume_state; | |
1985 | udc->resume_state = 0; | |
1986 | ||
1987 | /* report resume to the driver */ | |
1988 | if (udc->driver) { | |
1989 | if (udc->driver->resume) { | |
1990 | spin_unlock(&udc->lock); | |
1991 | udc->driver->resume(&udc->gadget); | |
1992 | spin_lock(&udc->lock); | |
1993 | } | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | static void irq_process_suspend(struct mv_udc *udc) | |
1998 | { | |
1999 | udc->resume_state = udc->usb_state; | |
2000 | udc->usb_state = USB_STATE_SUSPENDED; | |
2001 | ||
2002 | if (udc->driver->suspend) { | |
2003 | spin_unlock(&udc->lock); | |
2004 | udc->driver->suspend(&udc->gadget); | |
2005 | spin_lock(&udc->lock); | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | static void irq_process_port_change(struct mv_udc *udc) | |
2010 | { | |
2011 | u32 portsc; | |
2012 | ||
2013 | portsc = readl(&udc->op_regs->portsc[0]); | |
2014 | if (!(portsc & PORTSCX_PORT_RESET)) { | |
2015 | /* Get the speed */ | |
2016 | u32 speed = portsc & PORTSCX_PORT_SPEED_MASK; | |
2017 | switch (speed) { | |
2018 | case PORTSCX_PORT_SPEED_HIGH: | |
2019 | udc->gadget.speed = USB_SPEED_HIGH; | |
2020 | break; | |
2021 | case PORTSCX_PORT_SPEED_FULL: | |
2022 | udc->gadget.speed = USB_SPEED_FULL; | |
2023 | break; | |
2024 | case PORTSCX_PORT_SPEED_LOW: | |
2025 | udc->gadget.speed = USB_SPEED_LOW; | |
2026 | break; | |
2027 | default: | |
2028 | udc->gadget.speed = USB_SPEED_UNKNOWN; | |
2029 | break; | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | if (portsc & PORTSCX_PORT_SUSPEND) { | |
2034 | udc->resume_state = udc->usb_state; | |
2035 | udc->usb_state = USB_STATE_SUSPENDED; | |
2036 | if (udc->driver->suspend) { | |
2037 | spin_unlock(&udc->lock); | |
2038 | udc->driver->suspend(&udc->gadget); | |
2039 | spin_lock(&udc->lock); | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | if (!(portsc & PORTSCX_PORT_SUSPEND) | |
2044 | && udc->usb_state == USB_STATE_SUSPENDED) { | |
2045 | handle_bus_resume(udc); | |
2046 | } | |
2047 | ||
2048 | if (!udc->resume_state) | |
2049 | udc->usb_state = USB_STATE_DEFAULT; | |
2050 | } | |
2051 | ||
2052 | static void irq_process_error(struct mv_udc *udc) | |
2053 | { | |
2054 | /* Increment the error count */ | |
2055 | udc->errors++; | |
2056 | } | |
2057 | ||
2058 | static irqreturn_t mv_udc_irq(int irq, void *dev) | |
2059 | { | |
2060 | struct mv_udc *udc = (struct mv_udc *)dev; | |
2061 | u32 status, intr; | |
2062 | ||
309d6d2b NZ |
2063 | /* Disable ISR when stopped bit is set */ |
2064 | if (udc->stopped) | |
2065 | return IRQ_NONE; | |
2066 | ||
e7cddda4 | 2067 | spin_lock(&udc->lock); |
2068 | ||
2069 | status = readl(&udc->op_regs->usbsts); | |
2070 | intr = readl(&udc->op_regs->usbintr); | |
2071 | status &= intr; | |
2072 | ||
2073 | if (status == 0) { | |
2074 | spin_unlock(&udc->lock); | |
2075 | return IRQ_NONE; | |
2076 | } | |
2077 | ||
25985edc | 2078 | /* Clear all the interrupts occurred */ |
e7cddda4 | 2079 | writel(status, &udc->op_regs->usbsts); |
2080 | ||
2081 | if (status & USBSTS_ERR) | |
2082 | irq_process_error(udc); | |
2083 | ||
2084 | if (status & USBSTS_RESET) | |
2085 | irq_process_reset(udc); | |
2086 | ||
2087 | if (status & USBSTS_PORT_CHANGE) | |
2088 | irq_process_port_change(udc); | |
2089 | ||
2090 | if (status & USBSTS_INT) | |
2091 | irq_process_tr_complete(udc); | |
2092 | ||
2093 | if (status & USBSTS_SUSPEND) | |
2094 | irq_process_suspend(udc); | |
2095 | ||
2096 | spin_unlock(&udc->lock); | |
2097 | ||
2098 | return IRQ_HANDLED; | |
2099 | } | |
2100 | ||
1aec033b NZ |
2101 | static irqreturn_t mv_udc_vbus_irq(int irq, void *dev) |
2102 | { | |
2103 | struct mv_udc *udc = (struct mv_udc *)dev; | |
2104 | ||
2105 | /* polling VBUS and init phy may cause too much time*/ | |
2106 | if (udc->qwork) | |
2107 | queue_work(udc->qwork, &udc->vbus_work); | |
2108 | ||
2109 | return IRQ_HANDLED; | |
2110 | } | |
2111 | ||
2112 | static void mv_udc_vbus_work(struct work_struct *work) | |
2113 | { | |
2114 | struct mv_udc *udc; | |
2115 | unsigned int vbus; | |
2116 | ||
2117 | udc = container_of(work, struct mv_udc, vbus_work); | |
2118 | if (!udc->pdata->vbus) | |
2119 | return; | |
2120 | ||
2121 | vbus = udc->pdata->vbus->poll(); | |
2122 | dev_info(&udc->dev->dev, "vbus is %d\n", vbus); | |
2123 | ||
2124 | if (vbus == VBUS_HIGH) | |
2125 | mv_udc_vbus_session(&udc->gadget, 1); | |
2126 | else if (vbus == VBUS_LOW) | |
2127 | mv_udc_vbus_session(&udc->gadget, 0); | |
2128 | } | |
2129 | ||
e7cddda4 | 2130 | /* release device structure */ |
2131 | static void gadget_release(struct device *_dev) | |
2132 | { | |
2133 | struct mv_udc *udc = the_controller; | |
2134 | ||
2135 | complete(udc->done); | |
e7cddda4 | 2136 | } |
2137 | ||
5d0b8d0f | 2138 | static int __devexit mv_udc_remove(struct platform_device *dev) |
e7cddda4 | 2139 | { |
2140 | struct mv_udc *udc = the_controller; | |
dde34cc5 | 2141 | int clk_i; |
e7cddda4 | 2142 | |
0f91349b SAS |
2143 | usb_del_gadget_udc(&udc->gadget); |
2144 | ||
1aec033b NZ |
2145 | if (udc->qwork) { |
2146 | flush_workqueue(udc->qwork); | |
2147 | destroy_workqueue(udc->qwork); | |
2148 | } | |
2149 | ||
487d54d1 NZ |
2150 | /* |
2151 | * If we have transceiver inited, | |
2152 | * then vbus irq will not be requested in udc driver. | |
2153 | */ | |
2154 | if (udc->pdata && udc->pdata->vbus | |
2155 | && udc->clock_gating && udc->transceiver == NULL) | |
1aec033b | 2156 | free_irq(udc->pdata->vbus->irq, &dev->dev); |
e7cddda4 | 2157 | |
2158 | /* free memory allocated in probe */ | |
2159 | if (udc->dtd_pool) | |
2160 | dma_pool_destroy(udc->dtd_pool); | |
2161 | ||
2162 | if (udc->ep_dqh) | |
2163 | dma_free_coherent(&dev->dev, udc->ep_dqh_size, | |
2164 | udc->ep_dqh, udc->ep_dqh_dma); | |
2165 | ||
2166 | kfree(udc->eps); | |
2167 | ||
2168 | if (udc->irq) | |
2169 | free_irq(udc->irq, &dev->dev); | |
2170 | ||
1aec033b NZ |
2171 | mv_udc_disable(udc); |
2172 | ||
e7cddda4 | 2173 | if (udc->cap_regs) |
2174 | iounmap(udc->cap_regs); | |
2175 | udc->cap_regs = NULL; | |
2176 | ||
2177 | if (udc->phy_regs) | |
2178 | iounmap((void *)udc->phy_regs); | |
2179 | udc->phy_regs = 0; | |
2180 | ||
2181 | if (udc->status_req) { | |
2182 | kfree(udc->status_req->req.buf); | |
2183 | kfree(udc->status_req); | |
2184 | } | |
2185 | ||
dde34cc5 NZ |
2186 | for (clk_i = 0; clk_i <= udc->clknum; clk_i++) |
2187 | clk_put(udc->clk[clk_i]); | |
2188 | ||
e7cddda4 | 2189 | device_unregister(&udc->gadget.dev); |
2190 | ||
2191 | /* free dev, wait for the release() finished */ | |
dde34cc5 NZ |
2192 | wait_for_completion(udc->done); |
2193 | kfree(udc); | |
e7cddda4 | 2194 | |
2195 | the_controller = NULL; | |
2196 | ||
2197 | return 0; | |
2198 | } | |
2199 | ||
5d0b8d0f | 2200 | static int __devinit mv_udc_probe(struct platform_device *dev) |
e7cddda4 | 2201 | { |
dde34cc5 | 2202 | struct mv_usb_platform_data *pdata = dev->dev.platform_data; |
e7cddda4 | 2203 | struct mv_udc *udc; |
2204 | int retval = 0; | |
dde34cc5 | 2205 | int clk_i = 0; |
e7cddda4 | 2206 | struct resource *r; |
2207 | size_t size; | |
2208 | ||
dde34cc5 NZ |
2209 | if (pdata == NULL) { |
2210 | dev_err(&dev->dev, "missing platform_data\n"); | |
2211 | return -ENODEV; | |
2212 | } | |
2213 | ||
2214 | size = sizeof(*udc) + sizeof(struct clk *) * pdata->clknum; | |
2215 | udc = kzalloc(size, GFP_KERNEL); | |
e7cddda4 | 2216 | if (udc == NULL) { |
2217 | dev_err(&dev->dev, "failed to allocate memory for udc\n"); | |
dde34cc5 | 2218 | return -ENOMEM; |
e7cddda4 | 2219 | } |
2220 | ||
dde34cc5 NZ |
2221 | the_controller = udc; |
2222 | udc->done = &release_done; | |
2223 | udc->pdata = dev->dev.platform_data; | |
e7cddda4 | 2224 | spin_lock_init(&udc->lock); |
2225 | ||
2226 | udc->dev = dev; | |
2227 | ||
487d54d1 NZ |
2228 | #ifdef CONFIG_USB_OTG_UTILS |
2229 | if (pdata->mode == MV_USB_MODE_OTG) | |
2230 | udc->transceiver = otg_get_transceiver(); | |
2231 | #endif | |
2232 | ||
dde34cc5 NZ |
2233 | udc->clknum = pdata->clknum; |
2234 | for (clk_i = 0; clk_i < udc->clknum; clk_i++) { | |
2235 | udc->clk[clk_i] = clk_get(&dev->dev, pdata->clkname[clk_i]); | |
2236 | if (IS_ERR(udc->clk[clk_i])) { | |
2237 | retval = PTR_ERR(udc->clk[clk_i]); | |
2238 | goto err_put_clk; | |
2239 | } | |
e7cddda4 | 2240 | } |
2241 | ||
dde34cc5 | 2242 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "capregs"); |
e7cddda4 | 2243 | if (r == NULL) { |
2244 | dev_err(&dev->dev, "no I/O memory resource defined\n"); | |
2245 | retval = -ENODEV; | |
dde34cc5 | 2246 | goto err_put_clk; |
e7cddda4 | 2247 | } |
2248 | ||
2249 | udc->cap_regs = (struct mv_cap_regs __iomem *) | |
2250 | ioremap(r->start, resource_size(r)); | |
2251 | if (udc->cap_regs == NULL) { | |
2252 | dev_err(&dev->dev, "failed to map I/O memory\n"); | |
2253 | retval = -EBUSY; | |
dde34cc5 | 2254 | goto err_put_clk; |
e7cddda4 | 2255 | } |
2256 | ||
dde34cc5 | 2257 | r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "phyregs"); |
e7cddda4 | 2258 | if (r == NULL) { |
2259 | dev_err(&dev->dev, "no phy I/O memory resource defined\n"); | |
2260 | retval = -ENODEV; | |
dde34cc5 | 2261 | goto err_iounmap_capreg; |
e7cddda4 | 2262 | } |
2263 | ||
2264 | udc->phy_regs = (unsigned int)ioremap(r->start, resource_size(r)); | |
2265 | if (udc->phy_regs == 0) { | |
2266 | dev_err(&dev->dev, "failed to map phy I/O memory\n"); | |
2267 | retval = -EBUSY; | |
dde34cc5 | 2268 | goto err_iounmap_capreg; |
e7cddda4 | 2269 | } |
2270 | ||
2271 | /* we will acces controller register, so enable the clk */ | |
85ff7bfb NZ |
2272 | retval = mv_udc_enable_internal(udc); |
2273 | if (retval) | |
2274 | goto err_iounmap_phyreg; | |
e7cddda4 | 2275 | |
2276 | udc->op_regs = (struct mv_op_regs __iomem *)((u32)udc->cap_regs | |
2277 | + (readl(&udc->cap_regs->caplength_hciversion) | |
2278 | & CAPLENGTH_MASK)); | |
2279 | udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK; | |
2280 | ||
4540a9ab NZ |
2281 | /* |
2282 | * some platform will use usb to download image, it may not disconnect | |
2283 | * usb gadget before loading kernel. So first stop udc here. | |
2284 | */ | |
2285 | udc_stop(udc); | |
2286 | writel(0xFFFFFFFF, &udc->op_regs->usbsts); | |
2287 | ||
e7cddda4 | 2288 | size = udc->max_eps * sizeof(struct mv_dqh) *2; |
2289 | size = (size + DQH_ALIGNMENT - 1) & ~(DQH_ALIGNMENT - 1); | |
2290 | udc->ep_dqh = dma_alloc_coherent(&dev->dev, size, | |
2291 | &udc->ep_dqh_dma, GFP_KERNEL); | |
2292 | ||
2293 | if (udc->ep_dqh == NULL) { | |
2294 | dev_err(&dev->dev, "allocate dQH memory failed\n"); | |
2295 | retval = -ENOMEM; | |
dde34cc5 | 2296 | goto err_disable_clock; |
e7cddda4 | 2297 | } |
2298 | udc->ep_dqh_size = size; | |
2299 | ||
2300 | /* create dTD dma_pool resource */ | |
2301 | udc->dtd_pool = dma_pool_create("mv_dtd", | |
2302 | &dev->dev, | |
2303 | sizeof(struct mv_dtd), | |
2304 | DTD_ALIGNMENT, | |
2305 | DMA_BOUNDARY); | |
2306 | ||
2307 | if (!udc->dtd_pool) { | |
2308 | retval = -ENOMEM; | |
dde34cc5 | 2309 | goto err_free_dma; |
e7cddda4 | 2310 | } |
2311 | ||
2312 | size = udc->max_eps * sizeof(struct mv_ep) *2; | |
2313 | udc->eps = kzalloc(size, GFP_KERNEL); | |
2314 | if (udc->eps == NULL) { | |
2315 | dev_err(&dev->dev, "allocate ep memory failed\n"); | |
2316 | retval = -ENOMEM; | |
dde34cc5 | 2317 | goto err_destroy_dma; |
e7cddda4 | 2318 | } |
2319 | ||
2320 | /* initialize ep0 status request structure */ | |
2321 | udc->status_req = kzalloc(sizeof(struct mv_req), GFP_KERNEL); | |
2322 | if (!udc->status_req) { | |
2323 | dev_err(&dev->dev, "allocate status_req memory failed\n"); | |
2324 | retval = -ENOMEM; | |
dde34cc5 | 2325 | goto err_free_eps; |
e7cddda4 | 2326 | } |
2327 | INIT_LIST_HEAD(&udc->status_req->queue); | |
2328 | ||
2329 | /* allocate a small amount of memory to get valid address */ | |
2330 | udc->status_req->req.buf = kzalloc(8, GFP_KERNEL); | |
46e172df | 2331 | udc->status_req->req.dma = DMA_ADDR_INVALID; |
e7cddda4 | 2332 | |
2333 | udc->resume_state = USB_STATE_NOTATTACHED; | |
2334 | udc->usb_state = USB_STATE_POWERED; | |
2335 | udc->ep0_dir = EP_DIR_OUT; | |
2336 | udc->remote_wakeup = 0; | |
2337 | ||
2338 | r = platform_get_resource(udc->dev, IORESOURCE_IRQ, 0); | |
2339 | if (r == NULL) { | |
2340 | dev_err(&dev->dev, "no IRQ resource defined\n"); | |
2341 | retval = -ENODEV; | |
dde34cc5 | 2342 | goto err_free_status_req; |
e7cddda4 | 2343 | } |
2344 | udc->irq = r->start; | |
2345 | if (request_irq(udc->irq, mv_udc_irq, | |
b5dd18d8 | 2346 | IRQF_SHARED, driver_name, udc)) { |
e7cddda4 | 2347 | dev_err(&dev->dev, "Request irq %d for UDC failed\n", |
2348 | udc->irq); | |
2349 | retval = -ENODEV; | |
dde34cc5 | 2350 | goto err_free_status_req; |
e7cddda4 | 2351 | } |
2352 | ||
2353 | /* initialize gadget structure */ | |
2354 | udc->gadget.ops = &mv_ops; /* usb_gadget_ops */ | |
2355 | udc->gadget.ep0 = &udc->eps[0].ep; /* gadget ep0 */ | |
2356 | INIT_LIST_HEAD(&udc->gadget.ep_list); /* ep_list */ | |
2357 | udc->gadget.speed = USB_SPEED_UNKNOWN; /* speed */ | |
d327ab5b | 2358 | udc->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */ |
e7cddda4 | 2359 | |
2360 | /* the "gadget" abstracts/virtualizes the controller */ | |
2361 | dev_set_name(&udc->gadget.dev, "gadget"); | |
2362 | udc->gadget.dev.parent = &dev->dev; | |
2363 | udc->gadget.dev.dma_mask = dev->dev.dma_mask; | |
2364 | udc->gadget.dev.release = gadget_release; | |
2365 | udc->gadget.name = driver_name; /* gadget name */ | |
2366 | ||
2367 | retval = device_register(&udc->gadget.dev); | |
2368 | if (retval) | |
dde34cc5 | 2369 | goto err_free_irq; |
e7cddda4 | 2370 | |
2371 | eps_init(udc); | |
2372 | ||
1aec033b | 2373 | /* VBUS detect: we can disable/enable clock on demand.*/ |
487d54d1 NZ |
2374 | if (udc->transceiver) |
2375 | udc->clock_gating = 1; | |
2376 | else if (pdata->vbus) { | |
1aec033b NZ |
2377 | udc->clock_gating = 1; |
2378 | retval = request_threaded_irq(pdata->vbus->irq, NULL, | |
2379 | mv_udc_vbus_irq, IRQF_ONESHOT, "vbus", udc); | |
2380 | if (retval) { | |
2381 | dev_info(&dev->dev, | |
2382 | "Can not request irq for VBUS, " | |
2383 | "disable clock gating\n"); | |
2384 | udc->clock_gating = 0; | |
2385 | } | |
2386 | ||
2387 | udc->qwork = create_singlethread_workqueue("mv_udc_queue"); | |
2388 | if (!udc->qwork) { | |
2389 | dev_err(&dev->dev, "cannot create workqueue\n"); | |
2390 | retval = -ENOMEM; | |
2391 | goto err_unregister; | |
2392 | } | |
2393 | ||
2394 | INIT_WORK(&udc->vbus_work, mv_udc_vbus_work); | |
2395 | } | |
2396 | ||
2397 | /* | |
2398 | * When clock gating is supported, we can disable clk and phy. | |
2399 | * If not, it means that VBUS detection is not supported, we | |
2400 | * have to enable vbus active all the time to let controller work. | |
2401 | */ | |
85ff7bfb NZ |
2402 | if (udc->clock_gating) |
2403 | mv_udc_disable_internal(udc); | |
2404 | else | |
1aec033b | 2405 | udc->vbus_active = 1; |
e7cddda4 | 2406 | |
0f91349b | 2407 | retval = usb_add_gadget_udc(&dev->dev, &udc->gadget); |
dde34cc5 NZ |
2408 | if (retval) |
2409 | goto err_unregister; | |
2410 | ||
1aec033b NZ |
2411 | dev_info(&dev->dev, "successful probe UDC device %s clock gating.\n", |
2412 | udc->clock_gating ? "with" : "without"); | |
2413 | ||
dde34cc5 NZ |
2414 | return 0; |
2415 | ||
2416 | err_unregister: | |
487d54d1 NZ |
2417 | if (udc->pdata && udc->pdata->vbus |
2418 | && udc->clock_gating && udc->transceiver == NULL) | |
1aec033b | 2419 | free_irq(pdata->vbus->irq, &dev->dev); |
dde34cc5 NZ |
2420 | device_unregister(&udc->gadget.dev); |
2421 | err_free_irq: | |
2422 | free_irq(udc->irq, &dev->dev); | |
2423 | err_free_status_req: | |
2424 | kfree(udc->status_req->req.buf); | |
2425 | kfree(udc->status_req); | |
2426 | err_free_eps: | |
2427 | kfree(udc->eps); | |
2428 | err_destroy_dma: | |
2429 | dma_pool_destroy(udc->dtd_pool); | |
2430 | err_free_dma: | |
2431 | dma_free_coherent(&dev->dev, udc->ep_dqh_size, | |
2432 | udc->ep_dqh, udc->ep_dqh_dma); | |
2433 | err_disable_clock: | |
85ff7bfb | 2434 | mv_udc_disable_internal(udc); |
dde34cc5 NZ |
2435 | err_iounmap_phyreg: |
2436 | iounmap((void *)udc->phy_regs); | |
2437 | err_iounmap_capreg: | |
2438 | iounmap(udc->cap_regs); | |
2439 | err_put_clk: | |
2440 | for (clk_i--; clk_i >= 0; clk_i--) | |
2441 | clk_put(udc->clk[clk_i]); | |
2442 | the_controller = NULL; | |
2443 | kfree(udc); | |
e7cddda4 | 2444 | return retval; |
2445 | } | |
2446 | ||
2447 | #ifdef CONFIG_PM | |
cb424473 | 2448 | static int mv_udc_suspend(struct device *_dev) |
e7cddda4 | 2449 | { |
2450 | struct mv_udc *udc = the_controller; | |
2451 | ||
5076ae55 NZ |
2452 | /* if OTG is enabled, the following will be done in OTG driver*/ |
2453 | if (udc->transceiver) | |
2454 | return 0; | |
2455 | ||
2456 | if (udc->pdata->vbus && udc->pdata->vbus->poll) | |
2457 | if (udc->pdata->vbus->poll() == VBUS_HIGH) { | |
2458 | dev_info(&udc->dev->dev, "USB cable is connected!\n"); | |
2459 | return -EAGAIN; | |
2460 | } | |
2461 | ||
2462 | /* | |
2463 | * only cable is unplugged, udc can suspend. | |
2464 | * So do not care about clock_gating == 1. | |
2465 | */ | |
2466 | if (!udc->clock_gating) { | |
2467 | udc_stop(udc); | |
2468 | ||
2469 | spin_lock_irq(&udc->lock); | |
2470 | /* stop all usb activities */ | |
2471 | stop_activity(udc, udc->driver); | |
2472 | spin_unlock_irq(&udc->lock); | |
2473 | ||
2474 | mv_udc_disable_internal(udc); | |
2475 | } | |
e7cddda4 | 2476 | |
2477 | return 0; | |
2478 | } | |
2479 | ||
cb424473 | 2480 | static int mv_udc_resume(struct device *_dev) |
e7cddda4 | 2481 | { |
2482 | struct mv_udc *udc = the_controller; | |
2483 | int retval; | |
2484 | ||
5076ae55 NZ |
2485 | /* if OTG is enabled, the following will be done in OTG driver*/ |
2486 | if (udc->transceiver) | |
2487 | return 0; | |
2488 | ||
2489 | if (!udc->clock_gating) { | |
2490 | retval = mv_udc_enable_internal(udc); | |
2491 | if (retval) | |
dde34cc5 | 2492 | return retval; |
5076ae55 NZ |
2493 | |
2494 | if (udc->driver && udc->softconnect) { | |
2495 | udc_reset(udc); | |
2496 | ep0_reset(udc); | |
2497 | udc_start(udc); | |
dde34cc5 | 2498 | } |
e7cddda4 | 2499 | } |
dde34cc5 | 2500 | |
e7cddda4 | 2501 | return 0; |
2502 | } | |
2503 | ||
2504 | static const struct dev_pm_ops mv_udc_pm_ops = { | |
2505 | .suspend = mv_udc_suspend, | |
2506 | .resume = mv_udc_resume, | |
2507 | }; | |
2508 | #endif | |
2509 | ||
046b07ac NZ |
2510 | static void mv_udc_shutdown(struct platform_device *dev) |
2511 | { | |
2512 | struct mv_udc *udc = the_controller; | |
2513 | u32 mode; | |
2514 | ||
2515 | /* reset controller mode to IDLE */ | |
2516 | mode = readl(&udc->op_regs->usbmode); | |
2517 | mode &= ~3; | |
2518 | writel(mode, &udc->op_regs->usbmode); | |
2519 | } | |
2520 | ||
e7cddda4 | 2521 | static struct platform_driver udc_driver = { |
2522 | .probe = mv_udc_probe, | |
2523 | .remove = __exit_p(mv_udc_remove), | |
046b07ac | 2524 | .shutdown = mv_udc_shutdown, |
e7cddda4 | 2525 | .driver = { |
2526 | .owner = THIS_MODULE, | |
2527 | .name = "pxa-u2o", | |
2528 | #ifdef CONFIG_PM | |
cb424473 | 2529 | .pm = &mv_udc_pm_ops, |
e7cddda4 | 2530 | #endif |
2531 | }, | |
2532 | }; | |
86081d7b | 2533 | MODULE_ALIAS("platform:pxa-u2o"); |
e7cddda4 | 2534 | |
2535 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2536 | MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>"); | |
2537 | MODULE_VERSION(DRIVER_VERSION); | |
2538 | MODULE_LICENSE("GPL"); | |
2539 | ||
2540 | ||
2541 | static int __init init(void) | |
2542 | { | |
2543 | return platform_driver_register(&udc_driver); | |
2544 | } | |
2545 | module_init(init); | |
2546 | ||
2547 | ||
2548 | static void __exit cleanup(void) | |
2549 | { | |
2550 | platform_driver_unregister(&udc_driver); | |
2551 | } | |
2552 | module_exit(cleanup); | |
2553 |