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ab33d507 AC |
1 | /**************************************************************************** |
2 | * | |
3 | * Filename: cpia2_usb.c | |
4 | * | |
5 | * Copyright 2001, STMicrolectronics, Inc. | |
6 | * Contact: steve.miller@st.com | |
7 | * | |
8 | * Description: | |
9 | * This is a USB driver for CPia2 based video cameras. | |
10 | * The infrastructure of this driver is based on the cpia usb driver by | |
11 | * Jochen Scharrlach and Johannes Erdfeldt. | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
ab33d507 | 23 | * Stripped of 2.4 stuff ready for main kernel submit by |
d9b01449 | 24 | * Alan Cox <alan@lxorguk.ukuu.org.uk> |
ab33d507 AC |
25 | ****************************************************************************/ |
26 | ||
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/usb.h> | |
7a707b89 | 30 | #include <linux/module.h> |
ab33d507 AC |
31 | |
32 | #include "cpia2.h" | |
33 | ||
34 | static int frame_sizes[] = { | |
35 | 0, // USBIF_CMDONLY | |
6e6a8b5a MCC |
36 | 0, // USBIF_BULK |
37 | 128, // USBIF_ISO_1 | |
38 | 384, // USBIF_ISO_2 | |
39 | 640, // USBIF_ISO_3 | |
40 | 768, // USBIF_ISO_4 | |
41 | 896, // USBIF_ISO_5 | |
42 | 1023, // USBIF_ISO_6 | |
ab33d507 AC |
43 | }; |
44 | ||
45 | #define FRAMES_PER_DESC 10 | |
46 | #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt] | |
47 | ||
48 | static void process_frame(struct camera_data *cam); | |
7d12e780 | 49 | static void cpia2_usb_complete(struct urb *urb); |
ab33d507 AC |
50 | static int cpia2_usb_probe(struct usb_interface *intf, |
51 | const struct usb_device_id *id); | |
52 | static void cpia2_usb_disconnect(struct usb_interface *intf); | |
6c493f8b HV |
53 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message); |
54 | static int cpia2_usb_resume(struct usb_interface *intf); | |
ab33d507 AC |
55 | |
56 | static void free_sbufs(struct camera_data *cam); | |
57 | static void add_APPn(struct camera_data *cam); | |
58 | static void add_COM(struct camera_data *cam); | |
59 | static int submit_urbs(struct camera_data *cam); | |
60 | static int set_alternate(struct camera_data *cam, unsigned int alt); | |
61 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt); | |
62 | ||
7fb2e072 | 63 | static const struct usb_device_id cpia2_id_table[] = { |
ab33d507 AC |
64 | {USB_DEVICE(0x0553, 0x0100)}, |
65 | {USB_DEVICE(0x0553, 0x0140)}, | |
66 | {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */ | |
67 | {} /* Terminating entry */ | |
68 | }; | |
69 | MODULE_DEVICE_TABLE(usb, cpia2_id_table); | |
70 | ||
71 | static struct usb_driver cpia2_driver = { | |
72 | .name = "cpia2", | |
73 | .probe = cpia2_usb_probe, | |
74 | .disconnect = cpia2_usb_disconnect, | |
6c493f8b HV |
75 | .suspend = cpia2_usb_suspend, |
76 | .resume = cpia2_usb_resume, | |
77 | .reset_resume = cpia2_usb_resume, | |
ab33d507 AC |
78 | .id_table = cpia2_id_table |
79 | }; | |
80 | ||
81 | ||
82 | /****************************************************************************** | |
83 | * | |
84 | * process_frame | |
85 | * | |
86 | *****************************************************************************/ | |
87 | static void process_frame(struct camera_data *cam) | |
88 | { | |
ff699e6b | 89 | static int frame_count; |
ab33d507 AC |
90 | |
91 | unsigned char *inbuff = cam->workbuff->data; | |
92 | ||
93 | DBG("Processing frame #%d, current:%d\n", | |
94 | cam->workbuff->num, cam->curbuff->num); | |
95 | ||
96 | if(cam->workbuff->length > cam->workbuff->max_length) | |
97 | cam->workbuff->max_length = cam->workbuff->length; | |
98 | ||
99 | if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) { | |
100 | frame_count++; | |
101 | } else { | |
102 | cam->workbuff->status = FRAME_ERROR; | |
103 | DBG("Start of frame not found\n"); | |
104 | return; | |
105 | } | |
106 | ||
107 | /*** | |
108 | * Now the output buffer should have a JPEG image in it. | |
109 | ***/ | |
110 | if(!cam->first_image_seen) { | |
111 | /* Always skip the first image after streaming | |
112 | * starts. It is almost certainly corrupt. */ | |
113 | cam->first_image_seen = 1; | |
114 | cam->workbuff->status = FRAME_EMPTY; | |
115 | return; | |
116 | } | |
117 | if (cam->workbuff->length > 3) { | |
118 | if(cam->mmapped && | |
119 | cam->workbuff->length < cam->workbuff->max_length) { | |
120 | /* No junk in the buffers */ | |
121 | memset(cam->workbuff->data+cam->workbuff->length, | |
122 | 0, cam->workbuff->max_length- | |
123 | cam->workbuff->length); | |
124 | } | |
125 | cam->workbuff->max_length = cam->workbuff->length; | |
126 | cam->workbuff->status = FRAME_READY; | |
127 | ||
128 | if(!cam->mmapped && cam->num_frames > 2) { | |
129 | /* During normal reading, the most recent | |
130 | * frame will be read. If the current frame | |
131 | * hasn't started reading yet, it will never | |
132 | * be read, so mark it empty. If the buffer is | |
133 | * mmapped, or we have few buffers, we need to | |
134 | * wait for the user to free the buffer. | |
135 | * | |
136 | * NOTE: This is not entirely foolproof with 3 | |
137 | * buffers, but it would take an EXTREMELY | |
138 | * overloaded system to cause problems (possible | |
139 | * image data corruption). Basically, it would | |
140 | * need to take more time to execute cpia2_read | |
141 | * than it would for the camera to send | |
142 | * cam->num_frames-2 frames before problems | |
143 | * could occur. | |
144 | */ | |
145 | cam->curbuff->status = FRAME_EMPTY; | |
146 | } | |
147 | cam->curbuff = cam->workbuff; | |
148 | cam->workbuff = cam->workbuff->next; | |
149 | DBG("Changed buffers, work:%d, current:%d\n", | |
150 | cam->workbuff->num, cam->curbuff->num); | |
151 | return; | |
152 | } else { | |
153 | DBG("Not enough data for an image.\n"); | |
154 | } | |
155 | ||
156 | cam->workbuff->status = FRAME_ERROR; | |
157 | return; | |
158 | } | |
159 | ||
160 | /****************************************************************************** | |
161 | * | |
162 | * add_APPn | |
163 | * | |
164 | * Adds a user specified APPn record | |
165 | *****************************************************************************/ | |
166 | static void add_APPn(struct camera_data *cam) | |
167 | { | |
168 | if(cam->APP_len > 0) { | |
169 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
170 | cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn; | |
171 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
172 | cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2; | |
173 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
174 | cam->APP_data, cam->APP_len); | |
175 | cam->workbuff->length += cam->APP_len; | |
176 | } | |
177 | } | |
178 | ||
179 | /****************************************************************************** | |
180 | * | |
181 | * add_COM | |
182 | * | |
183 | * Adds a user specified COM record | |
184 | *****************************************************************************/ | |
185 | static void add_COM(struct camera_data *cam) | |
186 | { | |
187 | if(cam->COM_len > 0) { | |
188 | cam->workbuff->data[cam->workbuff->length++] = 0xFF; | |
189 | cam->workbuff->data[cam->workbuff->length++] = 0xFE; | |
190 | cam->workbuff->data[cam->workbuff->length++] = 0; | |
191 | cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2; | |
192 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
193 | cam->COM_data, cam->COM_len); | |
194 | cam->workbuff->length += cam->COM_len; | |
195 | } | |
196 | } | |
197 | ||
198 | /****************************************************************************** | |
199 | * | |
200 | * cpia2_usb_complete | |
201 | * | |
202 | * callback when incoming packet is received | |
203 | *****************************************************************************/ | |
7d12e780 | 204 | static void cpia2_usb_complete(struct urb *urb) |
ab33d507 AC |
205 | { |
206 | int i; | |
207 | unsigned char *cdata; | |
b5eee196 | 208 | static bool frame_ready = false; |
ab33d507 AC |
209 | struct camera_data *cam = (struct camera_data *) urb->context; |
210 | ||
211 | if (urb->status!=0) { | |
212 | if (!(urb->status == -ENOENT || | |
213 | urb->status == -ECONNRESET || | |
214 | urb->status == -ESHUTDOWN)) | |
215 | { | |
216 | DBG("urb->status = %d!\n", urb->status); | |
217 | } | |
218 | DBG("Stopping streaming\n"); | |
219 | return; | |
220 | } | |
221 | ||
6c493f8b HV |
222 | if (!cam->streaming || !video_is_registered(&cam->vdev)) { |
223 | LOG("Will now stop the streaming: streaming = %d, present=%d\n", | |
224 | cam->streaming, video_is_registered(&cam->vdev)); | |
ab33d507 AC |
225 | return; |
226 | } | |
227 | ||
228 | /*** | |
229 | * Packet collater | |
230 | ***/ | |
231 | //DBG("Collating %d packets\n", urb->number_of_packets); | |
232 | for (i = 0; i < urb->number_of_packets; i++) { | |
233 | u16 checksum, iso_checksum; | |
234 | int j; | |
235 | int n = urb->iso_frame_desc[i].actual_length; | |
236 | int st = urb->iso_frame_desc[i].status; | |
237 | ||
238 | if(cam->workbuff->status == FRAME_READY) { | |
239 | struct framebuf *ptr; | |
240 | /* Try to find an available buffer */ | |
241 | DBG("workbuff full, searching\n"); | |
242 | for (ptr = cam->workbuff->next; | |
243 | ptr != cam->workbuff; | |
244 | ptr = ptr->next) | |
245 | { | |
246 | if (ptr->status == FRAME_EMPTY) { | |
247 | ptr->status = FRAME_READING; | |
248 | ptr->length = 0; | |
249 | break; | |
250 | } | |
251 | } | |
252 | if (ptr == cam->workbuff) | |
253 | break; /* No READING or EMPTY buffers left */ | |
254 | ||
255 | cam->workbuff = ptr; | |
256 | } | |
257 | ||
258 | if (cam->workbuff->status == FRAME_EMPTY || | |
259 | cam->workbuff->status == FRAME_ERROR) { | |
260 | cam->workbuff->status = FRAME_READING; | |
261 | cam->workbuff->length = 0; | |
262 | } | |
263 | ||
264 | //DBG(" Packet %d length = %d, status = %d\n", i, n, st); | |
265 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; | |
266 | ||
267 | if (st) { | |
268 | LOG("cpia2 data error: [%d] len=%d, status = %d\n", | |
269 | i, n, st); | |
270 | if(!ALLOW_CORRUPT) | |
271 | cam->workbuff->status = FRAME_ERROR; | |
272 | continue; | |
273 | } | |
274 | ||
275 | if(n<=2) | |
276 | continue; | |
277 | ||
278 | checksum = 0; | |
279 | for(j=0; j<n-2; ++j) | |
280 | checksum += cdata[j]; | |
281 | iso_checksum = cdata[j] + cdata[j+1]*256; | |
282 | if(checksum != iso_checksum) { | |
283 | LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n", | |
284 | i, n, (int)checksum, (int)iso_checksum); | |
285 | if(!ALLOW_CORRUPT) { | |
286 | cam->workbuff->status = FRAME_ERROR; | |
287 | continue; | |
288 | } | |
289 | } | |
290 | n -= 2; | |
291 | ||
292 | if(cam->workbuff->status != FRAME_READING) { | |
293 | if((0xFF == cdata[0] && 0xD8 == cdata[1]) || | |
294 | (0xD8 == cdata[0] && 0xFF == cdata[1] && | |
295 | 0 != cdata[2])) { | |
296 | /* frame is skipped, but increment total | |
297 | * frame count anyway */ | |
298 | cam->frame_count++; | |
299 | } | |
300 | DBG("workbuff not reading, status=%d\n", | |
301 | cam->workbuff->status); | |
302 | continue; | |
303 | } | |
304 | ||
305 | if (cam->frame_size < cam->workbuff->length + n) { | |
306 | ERR("buffer overflow! length: %d, n: %d\n", | |
307 | cam->workbuff->length, n); | |
308 | cam->workbuff->status = FRAME_ERROR; | |
309 | if(cam->workbuff->length > cam->workbuff->max_length) | |
310 | cam->workbuff->max_length = | |
311 | cam->workbuff->length; | |
312 | continue; | |
313 | } | |
314 | ||
315 | if (cam->workbuff->length == 0) { | |
316 | int data_offset; | |
317 | if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) { | |
318 | data_offset = 1; | |
319 | } else if((0xFF == cdata[0]) && (0xD8 == cdata[1]) | |
320 | && (0xFF == cdata[2])) { | |
321 | data_offset = 2; | |
322 | } else { | |
323 | DBG("Ignoring packet, not beginning!\n"); | |
324 | continue; | |
325 | } | |
326 | DBG("Start of frame pattern found\n"); | |
8e6057b5 | 327 | v4l2_get_timestamp(&cam->workbuff->timestamp); |
ab33d507 AC |
328 | cam->workbuff->seq = cam->frame_count++; |
329 | cam->workbuff->data[0] = 0xFF; | |
330 | cam->workbuff->data[1] = 0xD8; | |
331 | cam->workbuff->length = 2; | |
332 | add_APPn(cam); | |
333 | add_COM(cam); | |
334 | memcpy(cam->workbuff->data+cam->workbuff->length, | |
335 | cdata+data_offset, n-data_offset); | |
336 | cam->workbuff->length += n-data_offset; | |
337 | } else if (cam->workbuff->length > 0) { | |
338 | memcpy(cam->workbuff->data + cam->workbuff->length, | |
339 | cdata, n); | |
340 | cam->workbuff->length += n; | |
341 | } | |
342 | ||
343 | if ((cam->workbuff->length >= 3) && | |
344 | (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) && | |
345 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) && | |
346 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) { | |
347 | frame_ready = true; | |
348 | cam->workbuff->data[cam->workbuff->length - 1] = 0; | |
349 | cam->workbuff->length -= 1; | |
350 | } else if ((cam->workbuff->length >= 2) && | |
351 | (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) && | |
352 | (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) { | |
353 | frame_ready = true; | |
354 | } | |
355 | ||
356 | if (frame_ready) { | |
357 | DBG("Workbuff image size = %d\n",cam->workbuff->length); | |
358 | process_frame(cam); | |
359 | ||
360 | frame_ready = false; | |
361 | ||
362 | if (waitqueue_active(&cam->wq_stream)) | |
363 | wake_up_interruptible(&cam->wq_stream); | |
364 | } | |
365 | } | |
366 | ||
367 | if(cam->streaming) { | |
368 | /* resubmit */ | |
369 | urb->dev = cam->dev; | |
370 | if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) | |
371 | ERR("%s: usb_submit_urb ret %d!\n", __func__, i); | |
372 | } | |
373 | } | |
374 | ||
375 | /****************************************************************************** | |
376 | * | |
377 | * configure_transfer_mode | |
378 | * | |
379 | *****************************************************************************/ | |
380 | static int configure_transfer_mode(struct camera_data *cam, unsigned int alt) | |
381 | { | |
382 | static unsigned char iso_regs[8][4] = { | |
383 | {0x00, 0x00, 0x00, 0x00}, | |
384 | {0x00, 0x00, 0x00, 0x00}, | |
385 | {0xB9, 0x00, 0x00, 0x7E}, | |
386 | {0xB9, 0x00, 0x01, 0x7E}, | |
387 | {0xB9, 0x00, 0x02, 0x7E}, | |
388 | {0xB9, 0x00, 0x02, 0xFE}, | |
389 | {0xB9, 0x00, 0x03, 0x7E}, | |
390 | {0xB9, 0x00, 0x03, 0xFD} | |
391 | }; | |
392 | struct cpia2_command cmd; | |
393 | unsigned char reg; | |
394 | ||
6c493f8b | 395 | if (!video_is_registered(&cam->vdev)) |
ab33d507 AC |
396 | return -ENODEV; |
397 | ||
398 | /*** | |
399 | * Write the isoc registers according to the alternate selected | |
400 | ***/ | |
401 | cmd.direction = TRANSFER_WRITE; | |
402 | cmd.buffer.block_data[0] = iso_regs[alt][0]; | |
403 | cmd.buffer.block_data[1] = iso_regs[alt][1]; | |
404 | cmd.buffer.block_data[2] = iso_regs[alt][2]; | |
405 | cmd.buffer.block_data[3] = iso_regs[alt][3]; | |
406 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
407 | cmd.start = CPIA2_VC_USB_ISOLIM; | |
408 | cmd.reg_count = 4; | |
409 | cpia2_send_command(cam, &cmd); | |
410 | ||
411 | /*** | |
412 | * Enable relevant streams before starting polling. | |
413 | * First read USB Stream Config Register. | |
414 | ***/ | |
415 | cmd.direction = TRANSFER_READ; | |
416 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
417 | cmd.start = CPIA2_VC_USB_STRM; | |
418 | cmd.reg_count = 1; | |
419 | cpia2_send_command(cam, &cmd); | |
420 | reg = cmd.buffer.block_data[0]; | |
421 | ||
422 | /* Clear iso, bulk, and int */ | |
423 | reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE | | |
424 | CPIA2_VC_USB_STRM_ISO_ENABLE | | |
425 | CPIA2_VC_USB_STRM_INT_ENABLE); | |
426 | ||
427 | if (alt == USBIF_BULK) { | |
428 | DBG("Enabling bulk xfer\n"); | |
429 | reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */ | |
430 | cam->xfer_mode = XFER_BULK; | |
431 | } else if (alt >= USBIF_ISO_1) { | |
432 | DBG("Enabling ISOC xfer\n"); | |
433 | reg |= CPIA2_VC_USB_STRM_ISO_ENABLE; | |
434 | cam->xfer_mode = XFER_ISOC; | |
435 | } | |
436 | ||
437 | cmd.buffer.block_data[0] = reg; | |
438 | cmd.direction = TRANSFER_WRITE; | |
439 | cmd.start = CPIA2_VC_USB_STRM; | |
440 | cmd.reg_count = 1; | |
441 | cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC; | |
442 | cpia2_send_command(cam, &cmd); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | /****************************************************************************** | |
448 | * | |
449 | * cpia2_usb_change_streaming_alternate | |
450 | * | |
451 | *****************************************************************************/ | |
452 | int cpia2_usb_change_streaming_alternate(struct camera_data *cam, | |
453 | unsigned int alt) | |
454 | { | |
455 | int ret = 0; | |
456 | ||
457 | if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6) | |
458 | return -EINVAL; | |
459 | ||
460 | if(alt == cam->params.camera_state.stream_mode) | |
461 | return 0; | |
462 | ||
463 | cpia2_usb_stream_pause(cam); | |
464 | ||
465 | configure_transfer_mode(cam, alt); | |
466 | ||
467 | cam->params.camera_state.stream_mode = alt; | |
468 | ||
469 | /* Reset the camera to prevent image quality degradation */ | |
470 | cpia2_reset_camera(cam); | |
471 | ||
472 | cpia2_usb_stream_resume(cam); | |
473 | ||
474 | return ret; | |
475 | } | |
476 | ||
477 | /****************************************************************************** | |
478 | * | |
479 | * set_alternate | |
480 | * | |
481 | *****************************************************************************/ | |
d45b9b8a | 482 | static int set_alternate(struct camera_data *cam, unsigned int alt) |
ab33d507 AC |
483 | { |
484 | int ret = 0; | |
485 | ||
486 | if(alt == cam->cur_alt) | |
487 | return 0; | |
488 | ||
489 | if (cam->cur_alt != USBIF_CMDONLY) { | |
490 | DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY); | |
491 | ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY); | |
492 | if (ret != 0) | |
493 | return ret; | |
494 | } | |
495 | if (alt != USBIF_CMDONLY) { | |
496 | DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt); | |
497 | ret = usb_set_interface(cam->dev, cam->iface, alt); | |
498 | if (ret != 0) | |
499 | return ret; | |
500 | } | |
501 | ||
502 | cam->old_alt = cam->cur_alt; | |
503 | cam->cur_alt = alt; | |
504 | ||
505 | return ret; | |
506 | } | |
507 | ||
508 | /****************************************************************************** | |
509 | * | |
510 | * free_sbufs | |
511 | * | |
512 | * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL | |
513 | * are assumed to be allocated. Non-NULL .urb members are also assumed to be | |
514 | * submitted (and must therefore be killed before they are freed). | |
515 | *****************************************************************************/ | |
516 | static void free_sbufs(struct camera_data *cam) | |
517 | { | |
518 | int i; | |
519 | ||
520 | for (i = 0; i < NUM_SBUF; i++) { | |
521 | if(cam->sbuf[i].urb) { | |
522 | usb_kill_urb(cam->sbuf[i].urb); | |
523 | usb_free_urb(cam->sbuf[i].urb); | |
524 | cam->sbuf[i].urb = NULL; | |
525 | } | |
526 | if(cam->sbuf[i].data) { | |
527 | kfree(cam->sbuf[i].data); | |
528 | cam->sbuf[i].data = NULL; | |
529 | } | |
530 | } | |
531 | } | |
532 | ||
533 | /******* | |
534 | * Convenience functions | |
535 | *******/ | |
536 | /**************************************************************************** | |
537 | * | |
538 | * write_packet | |
539 | * | |
540 | ***************************************************************************/ | |
541 | static int write_packet(struct usb_device *udev, | |
542 | u8 request, u8 * registers, u16 start, size_t size) | |
543 | { | |
45ae4a52 MCC |
544 | unsigned char *buf; |
545 | int ret; | |
546 | ||
ab33d507 AC |
547 | if (!registers || size <= 0) |
548 | return -EINVAL; | |
549 | ||
9945cf99 | 550 | buf = kmemdup(registers, size, GFP_KERNEL); |
45ae4a52 MCC |
551 | if (!buf) |
552 | return -ENOMEM; | |
553 | ||
45ae4a52 | 554 | ret = usb_control_msg(udev, |
ab33d507 AC |
555 | usb_sndctrlpipe(udev, 0), |
556 | request, | |
557 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, | |
558 | start, /* value */ | |
559 | 0, /* index */ | |
45ae4a52 | 560 | buf, /* buffer */ |
ab33d507 AC |
561 | size, |
562 | HZ); | |
45ae4a52 MCC |
563 | |
564 | kfree(buf); | |
565 | return ret; | |
ab33d507 AC |
566 | } |
567 | ||
568 | /**************************************************************************** | |
569 | * | |
570 | * read_packet | |
571 | * | |
572 | ***************************************************************************/ | |
573 | static int read_packet(struct usb_device *udev, | |
574 | u8 request, u8 * registers, u16 start, size_t size) | |
575 | { | |
45ae4a52 MCC |
576 | unsigned char *buf; |
577 | int ret; | |
578 | ||
ab33d507 AC |
579 | if (!registers || size <= 0) |
580 | return -EINVAL; | |
581 | ||
45ae4a52 MCC |
582 | buf = kmalloc(size, GFP_KERNEL); |
583 | if (!buf) | |
584 | return -ENOMEM; | |
585 | ||
586 | ret = usb_control_msg(udev, | |
ab33d507 AC |
587 | usb_rcvctrlpipe(udev, 0), |
588 | request, | |
589 | USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE, | |
590 | start, /* value */ | |
591 | 0, /* index */ | |
45ae4a52 | 592 | buf, /* buffer */ |
ab33d507 AC |
593 | size, |
594 | HZ); | |
45ae4a52 MCC |
595 | |
596 | if (ret >= 0) | |
597 | memcpy(registers, buf, size); | |
598 | ||
599 | kfree(buf); | |
600 | ||
601 | return ret; | |
ab33d507 AC |
602 | } |
603 | ||
604 | /****************************************************************************** | |
605 | * | |
606 | * cpia2_usb_transfer_cmd | |
607 | * | |
608 | *****************************************************************************/ | |
609 | int cpia2_usb_transfer_cmd(struct camera_data *cam, | |
610 | void *registers, | |
611 | u8 request, u8 start, u8 count, u8 direction) | |
612 | { | |
613 | int err = 0; | |
614 | struct usb_device *udev = cam->dev; | |
615 | ||
616 | if (!udev) { | |
617 | ERR("%s: Internal driver error: udev is NULL\n", __func__); | |
618 | return -EINVAL; | |
619 | } | |
620 | ||
621 | if (!registers) { | |
622 | ERR("%s: Internal driver error: register array is NULL\n", __func__); | |
623 | return -EINVAL; | |
624 | } | |
625 | ||
626 | if (direction == TRANSFER_READ) { | |
627 | err = read_packet(udev, request, (u8 *)registers, start, count); | |
628 | if (err > 0) | |
629 | err = 0; | |
630 | } else if (direction == TRANSFER_WRITE) { | |
631 | err =write_packet(udev, request, (u8 *)registers, start, count); | |
632 | if (err < 0) { | |
633 | LOG("Control message failed, err val = %d\n", err); | |
634 | LOG("Message: request = 0x%0X, start = 0x%0X\n", | |
635 | request, start); | |
636 | LOG("Message: count = %d, register[0] = 0x%0X\n", | |
637 | count, ((unsigned char *) registers)[0]); | |
638 | } else | |
639 | err=0; | |
640 | } else { | |
641 | LOG("Unexpected first byte of direction: %d\n", | |
642 | direction); | |
643 | return -EINVAL; | |
644 | } | |
645 | ||
646 | if(err != 0) | |
647 | LOG("Unexpected error: %d\n", err); | |
648 | return err; | |
649 | } | |
650 | ||
651 | ||
652 | /****************************************************************************** | |
653 | * | |
654 | * submit_urbs | |
655 | * | |
656 | *****************************************************************************/ | |
657 | static int submit_urbs(struct camera_data *cam) | |
658 | { | |
659 | struct urb *urb; | |
beeb82be | 660 | int fx, err, i, j; |
ab33d507 AC |
661 | |
662 | for(i=0; i<NUM_SBUF; ++i) { | |
663 | if (cam->sbuf[i].data) | |
664 | continue; | |
665 | cam->sbuf[i].data = | |
6da2ec56 KC |
666 | kmalloc_array(FRAME_SIZE_PER_DESC, FRAMES_PER_DESC, |
667 | GFP_KERNEL); | |
ab33d507 | 668 | if (!cam->sbuf[i].data) { |
d82d418a AC |
669 | while (--i >= 0) { |
670 | kfree(cam->sbuf[i].data); | |
671 | cam->sbuf[i].data = NULL; | |
672 | } | |
ab33d507 AC |
673 | return -ENOMEM; |
674 | } | |
675 | } | |
676 | ||
677 | /* We double buffer the Isoc lists, and also know the polling | |
678 | * interval is every frame (1 == (1 << (bInterval -1))). | |
679 | */ | |
680 | for(i=0; i<NUM_SBUF; ++i) { | |
681 | if(cam->sbuf[i].urb) { | |
682 | continue; | |
683 | } | |
684 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); | |
685 | if (!urb) { | |
beeb82be DSL |
686 | for (j = 0; j < i; j++) |
687 | usb_free_urb(cam->sbuf[j].urb); | |
ab33d507 AC |
688 | return -ENOMEM; |
689 | } | |
690 | ||
691 | cam->sbuf[i].urb = urb; | |
692 | urb->dev = cam->dev; | |
693 | urb->context = cam; | |
694 | urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/); | |
695 | urb->transfer_flags = URB_ISO_ASAP; | |
696 | urb->transfer_buffer = cam->sbuf[i].data; | |
697 | urb->complete = cpia2_usb_complete; | |
698 | urb->number_of_packets = FRAMES_PER_DESC; | |
699 | urb->interval = 1; | |
700 | urb->transfer_buffer_length = | |
701 | FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; | |
702 | ||
703 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { | |
704 | urb->iso_frame_desc[fx].offset = | |
705 | FRAME_SIZE_PER_DESC * fx; | |
706 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; | |
707 | } | |
708 | } | |
709 | ||
710 | ||
711 | /* Queue the ISO urbs, and resubmit in the completion handler */ | |
712 | for(i=0; i<NUM_SBUF; ++i) { | |
713 | err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL); | |
714 | if (err) { | |
715 | ERR("usb_submit_urb[%d]() = %d\n", i, err); | |
716 | return err; | |
717 | } | |
718 | } | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | /****************************************************************************** | |
724 | * | |
725 | * cpia2_usb_stream_start | |
726 | * | |
727 | *****************************************************************************/ | |
728 | int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate) | |
729 | { | |
730 | int ret; | |
731 | int old_alt; | |
732 | ||
733 | if(cam->streaming) | |
734 | return 0; | |
735 | ||
736 | if (cam->flush) { | |
737 | int i; | |
738 | DBG("Flushing buffers\n"); | |
739 | for(i=0; i<cam->num_frames; ++i) { | |
740 | cam->buffers[i].status = FRAME_EMPTY; | |
741 | cam->buffers[i].length = 0; | |
742 | } | |
743 | cam->curbuff = &cam->buffers[0]; | |
744 | cam->workbuff = cam->curbuff->next; | |
745 | cam->flush = false; | |
746 | } | |
747 | ||
748 | old_alt = cam->params.camera_state.stream_mode; | |
749 | cam->params.camera_state.stream_mode = 0; | |
750 | ret = cpia2_usb_change_streaming_alternate(cam, alternate); | |
751 | if (ret < 0) { | |
752 | int ret2; | |
753 | ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret); | |
754 | cam->params.camera_state.stream_mode = old_alt; | |
755 | ret2 = set_alternate(cam, USBIF_CMDONLY); | |
756 | if (ret2 < 0) { | |
ca852dcd | 757 | ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already failed. Then tried to call set_alternate(USBIF_CMDONLY) = %d.\n", |
ab33d507 AC |
758 | alternate, ret, ret2); |
759 | } | |
760 | } else { | |
761 | cam->frame_count = 0; | |
762 | cam->streaming = 1; | |
763 | ret = cpia2_usb_stream_resume(cam); | |
764 | } | |
765 | return ret; | |
766 | } | |
767 | ||
768 | /****************************************************************************** | |
769 | * | |
770 | * cpia2_usb_stream_pause | |
771 | * | |
772 | *****************************************************************************/ | |
773 | int cpia2_usb_stream_pause(struct camera_data *cam) | |
774 | { | |
775 | int ret = 0; | |
776 | if(cam->streaming) { | |
ab33d507 | 777 | free_sbufs(cam); |
6c493f8b | 778 | ret = set_alternate(cam, USBIF_CMDONLY); |
ab33d507 AC |
779 | } |
780 | return ret; | |
781 | } | |
782 | ||
783 | /****************************************************************************** | |
784 | * | |
785 | * cpia2_usb_stream_resume | |
786 | * | |
787 | *****************************************************************************/ | |
788 | int cpia2_usb_stream_resume(struct camera_data *cam) | |
789 | { | |
790 | int ret = 0; | |
791 | if(cam->streaming) { | |
792 | cam->first_image_seen = 0; | |
793 | ret = set_alternate(cam, cam->params.camera_state.stream_mode); | |
794 | if(ret == 0) { | |
6c493f8b HV |
795 | /* for some reason the user effects need to be set |
796 | again when starting streaming. */ | |
797 | cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE, | |
798 | cam->params.vp_params.user_effects); | |
ab33d507 AC |
799 | ret = submit_urbs(cam); |
800 | } | |
801 | } | |
802 | return ret; | |
803 | } | |
804 | ||
805 | /****************************************************************************** | |
806 | * | |
807 | * cpia2_usb_stream_stop | |
808 | * | |
809 | *****************************************************************************/ | |
810 | int cpia2_usb_stream_stop(struct camera_data *cam) | |
811 | { | |
812 | int ret; | |
6c493f8b | 813 | |
ab33d507 AC |
814 | ret = cpia2_usb_stream_pause(cam); |
815 | cam->streaming = 0; | |
816 | configure_transfer_mode(cam, 0); | |
817 | return ret; | |
818 | } | |
819 | ||
820 | /****************************************************************************** | |
821 | * | |
822 | * cpia2_usb_probe | |
823 | * | |
824 | * Probe and initialize. | |
825 | *****************************************************************************/ | |
826 | static int cpia2_usb_probe(struct usb_interface *intf, | |
827 | const struct usb_device_id *id) | |
828 | { | |
829 | struct usb_device *udev = interface_to_usbdev(intf); | |
830 | struct usb_interface_descriptor *interface; | |
831 | struct camera_data *cam; | |
832 | int ret; | |
833 | ||
834 | /* A multi-config CPiA2 camera? */ | |
835 | if (udev->descriptor.bNumConfigurations != 1) | |
836 | return -ENODEV; | |
837 | interface = &intf->cur_altsetting->desc; | |
838 | ||
839 | /* If we get to this point, we found a CPiA2 camera */ | |
840 | LOG("CPiA2 USB camera found\n"); | |
841 | ||
6c493f8b HV |
842 | cam = cpia2_init_camera_struct(intf); |
843 | if (cam == NULL) | |
ab33d507 AC |
844 | return -ENOMEM; |
845 | ||
846 | cam->dev = udev; | |
847 | cam->iface = interface->bInterfaceNumber; | |
848 | ||
849 | ret = set_alternate(cam, USBIF_CMDONLY); | |
850 | if (ret < 0) { | |
851 | ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret); | |
852 | kfree(cam); | |
853 | return ret; | |
854 | } | |
855 | ||
ab33d507 AC |
856 | |
857 | if((ret = cpia2_init_camera(cam)) < 0) { | |
858 | ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret); | |
ab33d507 AC |
859 | kfree(cam); |
860 | return ret; | |
861 | } | |
862 | LOG(" CPiA Version: %d.%02d (%d.%d)\n", | |
863 | cam->params.version.firmware_revision_hi, | |
864 | cam->params.version.firmware_revision_lo, | |
865 | cam->params.version.asic_id, | |
866 | cam->params.version.asic_rev); | |
867 | LOG(" CPiA PnP-ID: %04x:%04x:%04x\n", | |
868 | cam->params.pnp_id.vendor, | |
869 | cam->params.pnp_id.product, | |
870 | cam->params.pnp_id.device_revision); | |
871 | LOG(" SensorID: %d.(version %d)\n", | |
872 | cam->params.version.sensor_flags, | |
873 | cam->params.version.sensor_rev); | |
874 | ||
875 | usb_set_intfdata(intf, cam); | |
876 | ||
6c493f8b HV |
877 | ret = cpia2_register_camera(cam); |
878 | if (ret < 0) { | |
879 | ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret); | |
880 | kfree(cam); | |
881 | return ret; | |
882 | } | |
883 | ||
ab33d507 AC |
884 | return 0; |
885 | } | |
886 | ||
887 | /****************************************************************************** | |
888 | * | |
889 | * cpia2_disconnect | |
890 | * | |
891 | *****************************************************************************/ | |
892 | static void cpia2_usb_disconnect(struct usb_interface *intf) | |
893 | { | |
894 | struct camera_data *cam = usb_get_intfdata(intf); | |
895 | usb_set_intfdata(intf, NULL); | |
ab33d507 AC |
896 | |
897 | DBG("Stopping stream\n"); | |
898 | cpia2_usb_stream_stop(cam); | |
899 | ||
6c493f8b | 900 | mutex_lock(&cam->v4l2_lock); |
ab33d507 AC |
901 | DBG("Unregistering camera\n"); |
902 | cpia2_unregister_camera(cam); | |
6c493f8b HV |
903 | v4l2_device_disconnect(&cam->v4l2_dev); |
904 | mutex_unlock(&cam->v4l2_lock); | |
905 | v4l2_device_put(&cam->v4l2_dev); | |
ab33d507 AC |
906 | |
907 | if(cam->buffers) { | |
908 | DBG("Wakeup waiting processes\n"); | |
909 | cam->curbuff->status = FRAME_READY; | |
910 | cam->curbuff->length = 0; | |
5063452e | 911 | wake_up_interruptible(&cam->wq_stream); |
ab33d507 AC |
912 | } |
913 | ||
6c493f8b HV |
914 | LOG("CPiA2 camera disconnected.\n"); |
915 | } | |
916 | ||
917 | static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message) | |
918 | { | |
919 | struct camera_data *cam = usb_get_intfdata(intf); | |
920 | ||
921 | mutex_lock(&cam->v4l2_lock); | |
922 | if (cam->streaming) { | |
923 | cpia2_usb_stream_stop(cam); | |
924 | cam->streaming = 1; | |
ab33d507 | 925 | } |
6c493f8b | 926 | mutex_unlock(&cam->v4l2_lock); |
ab33d507 | 927 | |
6c493f8b HV |
928 | dev_info(&intf->dev, "going into suspend..\n"); |
929 | return 0; | |
ab33d507 AC |
930 | } |
931 | ||
6c493f8b HV |
932 | /* Resume device - start device. */ |
933 | static int cpia2_usb_resume(struct usb_interface *intf) | |
934 | { | |
935 | struct camera_data *cam = usb_get_intfdata(intf); | |
936 | ||
937 | mutex_lock(&cam->v4l2_lock); | |
938 | v4l2_ctrl_handler_setup(&cam->hdl); | |
939 | if (cam->streaming) { | |
940 | cam->streaming = 0; | |
941 | cpia2_usb_stream_start(cam, | |
942 | cam->params.camera_state.stream_mode); | |
943 | } | |
944 | mutex_unlock(&cam->v4l2_lock); | |
945 | ||
946 | dev_info(&intf->dev, "coming out of suspend..\n"); | |
947 | return 0; | |
948 | } | |
ab33d507 AC |
949 | |
950 | /****************************************************************************** | |
951 | * | |
952 | * usb_cpia2_init | |
953 | * | |
954 | *****************************************************************************/ | |
955 | int cpia2_usb_init(void) | |
956 | { | |
957 | return usb_register(&cpia2_driver); | |
958 | } | |
959 | ||
960 | /****************************************************************************** | |
961 | * | |
962 | * usb_cpia_cleanup | |
963 | * | |
964 | *****************************************************************************/ | |
965 | void cpia2_usb_cleanup(void) | |
966 | { | |
967 | schedule_timeout(2 * HZ); | |
968 | usb_deregister(&cpia2_driver); | |
969 | } |