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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / media / usb / cpia2 / cpia2_usb.c
blob3ab80a7b44985d7b694a99accdad6fc374f2a9ae
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /****************************************************************************
3 *
4 * Filename: cpia2_usb.c
5 *
6 * Copyright 2001, STMicrolectronics, Inc.
7 * Contact: steve.miller@st.com
8 *
9 * Description:
10 * This is a USB driver for CPia2 based video cameras.
11 * The infrastructure of this driver is based on the cpia usb driver by
12 * Jochen Scharrlach and Johannes Erdfeldt.
13 *
14 * Stripped of 2.4 stuff ready for main kernel submit by
15 * Alan Cox <alan@lxorguk.ukuu.org.uk>
16 ****************************************************************************/
17
18 #include <linux/kernel.h>
19 #include <linux/slab.h>
20 #include <linux/usb.h>
21 #include <linux/module.h>
22
23 #include "cpia2.h"
24
25 static int frame_sizes[] = {
26 0, // USBIF_CMDONLY
27 0, // USBIF_BULK
28 128, // USBIF_ISO_1
29 384, // USBIF_ISO_2
30 640, // USBIF_ISO_3
31 768, // USBIF_ISO_4
32 896, // USBIF_ISO_5
33 1023, // USBIF_ISO_6
34 };
35
36 #define FRAMES_PER_DESC 10
37 #define FRAME_SIZE_PER_DESC frame_sizes[cam->cur_alt]
38
39 static void process_frame(struct camera_data *cam);
40 static void cpia2_usb_complete(struct urb *urb);
41 static int cpia2_usb_probe(struct usb_interface *intf,
42 const struct usb_device_id *id);
43 static void cpia2_usb_disconnect(struct usb_interface *intf);
44 static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message);
45 static int cpia2_usb_resume(struct usb_interface *intf);
46
47 static void free_sbufs(struct camera_data *cam);
48 static void add_APPn(struct camera_data *cam);
49 static void add_COM(struct camera_data *cam);
50 static int submit_urbs(struct camera_data *cam);
51 static int set_alternate(struct camera_data *cam, unsigned int alt);
52 static int configure_transfer_mode(struct camera_data *cam, unsigned int alt);
53
54 static const struct usb_device_id cpia2_id_table[] = {
55 {USB_DEVICE(0x0553, 0x0100)},
56 {USB_DEVICE(0x0553, 0x0140)},
57 {USB_DEVICE(0x0553, 0x0151)}, /* STV0676 */
58 {} /* Terminating entry */
59 };
60 MODULE_DEVICE_TABLE(usb, cpia2_id_table);
61
62 static struct usb_driver cpia2_driver = {
63 .name = "cpia2",
64 .probe = cpia2_usb_probe,
65 .disconnect = cpia2_usb_disconnect,
66 .suspend = cpia2_usb_suspend,
67 .resume = cpia2_usb_resume,
68 .reset_resume = cpia2_usb_resume,
69 .id_table = cpia2_id_table
70 };
71
72
73 /******************************************************************************
74 *
75 * process_frame
76 *
77 *****************************************************************************/
78 static void process_frame(struct camera_data *cam)
79 {
80 static int frame_count;
81
82 unsigned char *inbuff = cam->workbuff->data;
83
84 DBG("Processing frame #%d, current:%d\n",
85 cam->workbuff->num, cam->curbuff->num);
86
87 if(cam->workbuff->length > cam->workbuff->max_length)
88 cam->workbuff->max_length = cam->workbuff->length;
89
90 if ((inbuff[0] == 0xFF) && (inbuff[1] == 0xD8)) {
91 frame_count++;
92 } else {
93 cam->workbuff->status = FRAME_ERROR;
94 DBG("Start of frame not found\n");
95 return;
96 }
97
98 /***
99 * Now the output buffer should have a JPEG image in it.
100 ***/
101 if(!cam->first_image_seen) {
102 /* Always skip the first image after streaming
103 * starts. It is almost certainly corrupt. */
104 cam->first_image_seen = 1;
105 cam->workbuff->status = FRAME_EMPTY;
106 return;
107 }
108 if (cam->workbuff->length > 3) {
109 if(cam->mmapped &&
110 cam->workbuff->length < cam->workbuff->max_length) {
111 /* No junk in the buffers */
112 memset(cam->workbuff->data+cam->workbuff->length,
113 0, cam->workbuff->max_length-
114 cam->workbuff->length);
115 }
116 cam->workbuff->max_length = cam->workbuff->length;
117 cam->workbuff->status = FRAME_READY;
118
119 if(!cam->mmapped && cam->num_frames > 2) {
120 /* During normal reading, the most recent
121 * frame will be read. If the current frame
122 * hasn't started reading yet, it will never
123 * be read, so mark it empty. If the buffer is
124 * mmapped, or we have few buffers, we need to
125 * wait for the user to free the buffer.
126 *
127 * NOTE: This is not entirely foolproof with 3
128 * buffers, but it would take an EXTREMELY
129 * overloaded system to cause problems (possible
130 * image data corruption). Basically, it would
131 * need to take more time to execute cpia2_read
132 * than it would for the camera to send
133 * cam->num_frames-2 frames before problems
134 * could occur.
135 */
136 cam->curbuff->status = FRAME_EMPTY;
137 }
138 cam->curbuff = cam->workbuff;
139 cam->workbuff = cam->workbuff->next;
140 DBG("Changed buffers, work:%d, current:%d\n",
141 cam->workbuff->num, cam->curbuff->num);
142 return;
143 } else {
144 DBG("Not enough data for an image.\n");
145 }
146
147 cam->workbuff->status = FRAME_ERROR;
148 return;
149 }
150
151 /******************************************************************************
152 *
153 * add_APPn
154 *
155 * Adds a user specified APPn record
156 *****************************************************************************/
157 static void add_APPn(struct camera_data *cam)
158 {
159 if(cam->APP_len > 0) {
160 cam->workbuff->data[cam->workbuff->length++] = 0xFF;
161 cam->workbuff->data[cam->workbuff->length++] = 0xE0+cam->APPn;
162 cam->workbuff->data[cam->workbuff->length++] = 0;
163 cam->workbuff->data[cam->workbuff->length++] = cam->APP_len+2;
164 memcpy(cam->workbuff->data+cam->workbuff->length,
165 cam->APP_data, cam->APP_len);
166 cam->workbuff->length += cam->APP_len;
167 }
168 }
169
170 /******************************************************************************
171 *
172 * add_COM
173 *
174 * Adds a user specified COM record
175 *****************************************************************************/
176 static void add_COM(struct camera_data *cam)
177 {
178 if(cam->COM_len > 0) {
179 cam->workbuff->data[cam->workbuff->length++] = 0xFF;
180 cam->workbuff->data[cam->workbuff->length++] = 0xFE;
181 cam->workbuff->data[cam->workbuff->length++] = 0;
182 cam->workbuff->data[cam->workbuff->length++] = cam->COM_len+2;
183 memcpy(cam->workbuff->data+cam->workbuff->length,
184 cam->COM_data, cam->COM_len);
185 cam->workbuff->length += cam->COM_len;
186 }
187 }
188
189 /******************************************************************************
190 *
191 * cpia2_usb_complete
192 *
193 * callback when incoming packet is received
194 *****************************************************************************/
195 static void cpia2_usb_complete(struct urb *urb)
196 {
197 int i;
198 unsigned char *cdata;
199 static bool frame_ready = false;
200 struct camera_data *cam = (struct camera_data *) urb->context;
201
202 if (urb->status!=0) {
203 if (!(urb->status == -ENOENT ||
204 urb->status == -ECONNRESET ||
205 urb->status == -ESHUTDOWN))
206 {
207 DBG("urb->status = %d!\n", urb->status);
208 }
209 DBG("Stopping streaming\n");
210 return;
211 }
212
213 if (!cam->streaming || !video_is_registered(&cam->vdev)) {
214 LOG("Will now stop the streaming: streaming = %d, present=%d\n",
215 cam->streaming, video_is_registered(&cam->vdev));
216 return;
217 }
218
219 /***
220 * Packet collater
221 ***/
222 //DBG("Collating %d packets\n", urb->number_of_packets);
223 for (i = 0; i < urb->number_of_packets; i++) {
224 u16 checksum, iso_checksum;
225 int j;
226 int n = urb->iso_frame_desc[i].actual_length;
227 int st = urb->iso_frame_desc[i].status;
228
229 if(cam->workbuff->status == FRAME_READY) {
230 struct framebuf *ptr;
231 /* Try to find an available buffer */
232 DBG("workbuff full, searching\n");
233 for (ptr = cam->workbuff->next;
234 ptr != cam->workbuff;
235 ptr = ptr->next)
236 {
237 if (ptr->status == FRAME_EMPTY) {
238 ptr->status = FRAME_READING;
239 ptr->length = 0;
240 break;
241 }
242 }
243 if (ptr == cam->workbuff)
244 break; /* No READING or EMPTY buffers left */
245
246 cam->workbuff = ptr;
247 }
248
249 if (cam->workbuff->status == FRAME_EMPTY ||
250 cam->workbuff->status == FRAME_ERROR) {
251 cam->workbuff->status = FRAME_READING;
252 cam->workbuff->length = 0;
253 }
254
255 //DBG(" Packet %d length = %d, status = %d\n", i, n, st);
256 cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
257
258 if (st) {
259 LOG("cpia2 data error: [%d] len=%d, status = %d\n",
260 i, n, st);
261 if(!ALLOW_CORRUPT)
262 cam->workbuff->status = FRAME_ERROR;
263 continue;
264 }
265
266 if(n<=2)
267 continue;
268
269 checksum = 0;
270 for(j=0; j<n-2; ++j)
271 checksum += cdata[j];
272 iso_checksum = cdata[j] + cdata[j+1]*256;
273 if(checksum != iso_checksum) {
274 LOG("checksum mismatch: [%d] len=%d, calculated = %x, checksum = %x\n",
275 i, n, (int)checksum, (int)iso_checksum);
276 if(!ALLOW_CORRUPT) {
277 cam->workbuff->status = FRAME_ERROR;
278 continue;
279 }
280 }
281 n -= 2;
282
283 if(cam->workbuff->status != FRAME_READING) {
284 if((0xFF == cdata[0] && 0xD8 == cdata[1]) ||
285 (0xD8 == cdata[0] && 0xFF == cdata[1] &&
286 0 != cdata[2])) {
287 /* frame is skipped, but increment total
288 * frame count anyway */
289 cam->frame_count++;
290 }
291 DBG("workbuff not reading, status=%d\n",
292 cam->workbuff->status);
293 continue;
294 }
295
296 if (cam->frame_size < cam->workbuff->length + n) {
297 ERR("buffer overflow! length: %d, n: %d\n",
298 cam->workbuff->length, n);
299 cam->workbuff->status = FRAME_ERROR;
300 if(cam->workbuff->length > cam->workbuff->max_length)
301 cam->workbuff->max_length =
302 cam->workbuff->length;
303 continue;
304 }
305
306 if (cam->workbuff->length == 0) {
307 int data_offset;
308 if ((0xD8 == cdata[0]) && (0xFF == cdata[1])) {
309 data_offset = 1;
310 } else if((0xFF == cdata[0]) && (0xD8 == cdata[1])
311 && (0xFF == cdata[2])) {
312 data_offset = 2;
313 } else {
314 DBG("Ignoring packet, not beginning!\n");
315 continue;
316 }
317 DBG("Start of frame pattern found\n");
318 cam->workbuff->ts = ktime_get_ns();
319 cam->workbuff->seq = cam->frame_count++;
320 cam->workbuff->data[0] = 0xFF;
321 cam->workbuff->data[1] = 0xD8;
322 cam->workbuff->length = 2;
323 add_APPn(cam);
324 add_COM(cam);
325 memcpy(cam->workbuff->data+cam->workbuff->length,
326 cdata+data_offset, n-data_offset);
327 cam->workbuff->length += n-data_offset;
328 } else if (cam->workbuff->length > 0) {
329 memcpy(cam->workbuff->data + cam->workbuff->length,
330 cdata, n);
331 cam->workbuff->length += n;
332 }
333
334 if ((cam->workbuff->length >= 3) &&
335 (cam->workbuff->data[cam->workbuff->length - 3] == 0xFF) &&
336 (cam->workbuff->data[cam->workbuff->length - 2] == 0xD9) &&
337 (cam->workbuff->data[cam->workbuff->length - 1] == 0xFF)) {
338 frame_ready = true;
339 cam->workbuff->data[cam->workbuff->length - 1] = 0;
340 cam->workbuff->length -= 1;
341 } else if ((cam->workbuff->length >= 2) &&
342 (cam->workbuff->data[cam->workbuff->length - 2] == 0xFF) &&
343 (cam->workbuff->data[cam->workbuff->length - 1] == 0xD9)) {
344 frame_ready = true;
345 }
346
347 if (frame_ready) {
348 DBG("Workbuff image size = %d\n",cam->workbuff->length);
349 process_frame(cam);
350
351 frame_ready = false;
352
353 if (waitqueue_active(&cam->wq_stream))
354 wake_up_interruptible(&cam->wq_stream);
355 }
356 }
357
358 if(cam->streaming) {
359 /* resubmit */
360 urb->dev = cam->dev;
361 if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0)
362 ERR("%s: usb_submit_urb ret %d!\n", __func__, i);
363 }
364 }
365
366 /******************************************************************************
367 *
368 * configure_transfer_mode
369 *
370 *****************************************************************************/
371 static int configure_transfer_mode(struct camera_data *cam, unsigned int alt)
372 {
373 static unsigned char iso_regs[8][4] = {
374 {0x00, 0x00, 0x00, 0x00},
375 {0x00, 0x00, 0x00, 0x00},
376 {0xB9, 0x00, 0x00, 0x7E},
377 {0xB9, 0x00, 0x01, 0x7E},
378 {0xB9, 0x00, 0x02, 0x7E},
379 {0xB9, 0x00, 0x02, 0xFE},
380 {0xB9, 0x00, 0x03, 0x7E},
381 {0xB9, 0x00, 0x03, 0xFD}
382 };
383 struct cpia2_command cmd;
384 unsigned char reg;
385
386 if (!video_is_registered(&cam->vdev))
387 return -ENODEV;
388
389 /***
390 * Write the isoc registers according to the alternate selected
391 ***/
392 cmd.direction = TRANSFER_WRITE;
393 cmd.buffer.block_data[0] = iso_regs[alt][0];
394 cmd.buffer.block_data[1] = iso_regs[alt][1];
395 cmd.buffer.block_data[2] = iso_regs[alt][2];
396 cmd.buffer.block_data[3] = iso_regs[alt][3];
397 cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
398 cmd.start = CPIA2_VC_USB_ISOLIM;
399 cmd.reg_count = 4;
400 cpia2_send_command(cam, &cmd);
401
402 /***
403 * Enable relevant streams before starting polling.
404 * First read USB Stream Config Register.
405 ***/
406 cmd.direction = TRANSFER_READ;
407 cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
408 cmd.start = CPIA2_VC_USB_STRM;
409 cmd.reg_count = 1;
410 cpia2_send_command(cam, &cmd);
411 reg = cmd.buffer.block_data[0];
412
413 /* Clear iso, bulk, and int */
414 reg &= ~(CPIA2_VC_USB_STRM_BLK_ENABLE |
415 CPIA2_VC_USB_STRM_ISO_ENABLE |
416 CPIA2_VC_USB_STRM_INT_ENABLE);
417
418 if (alt == USBIF_BULK) {
419 DBG("Enabling bulk xfer\n");
420 reg |= CPIA2_VC_USB_STRM_BLK_ENABLE; /* Enable Bulk */
421 cam->xfer_mode = XFER_BULK;
422 } else if (alt >= USBIF_ISO_1) {
423 DBG("Enabling ISOC xfer\n");
424 reg |= CPIA2_VC_USB_STRM_ISO_ENABLE;
425 cam->xfer_mode = XFER_ISOC;
426 }
427
428 cmd.buffer.block_data[0] = reg;
429 cmd.direction = TRANSFER_WRITE;
430 cmd.start = CPIA2_VC_USB_STRM;
431 cmd.reg_count = 1;
432 cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
433 cpia2_send_command(cam, &cmd);
434
435 return 0;
436 }
437
438 /******************************************************************************
439 *
440 * cpia2_usb_change_streaming_alternate
441 *
442 *****************************************************************************/
443 int cpia2_usb_change_streaming_alternate(struct camera_data *cam,
444 unsigned int alt)
445 {
446 int ret = 0;
447
448 if(alt < USBIF_ISO_1 || alt > USBIF_ISO_6)
449 return -EINVAL;
450
451 if(alt == cam->params.camera_state.stream_mode)
452 return 0;
453
454 cpia2_usb_stream_pause(cam);
455
456 configure_transfer_mode(cam, alt);
457
458 cam->params.camera_state.stream_mode = alt;
459
460 /* Reset the camera to prevent image quality degradation */
461 cpia2_reset_camera(cam);
462
463 cpia2_usb_stream_resume(cam);
464
465 return ret;
466 }
467
468 /******************************************************************************
469 *
470 * set_alternate
471 *
472 *****************************************************************************/
473 static int set_alternate(struct camera_data *cam, unsigned int alt)
474 {
475 int ret = 0;
476
477 if(alt == cam->cur_alt)
478 return 0;
479
480 if (cam->cur_alt != USBIF_CMDONLY) {
481 DBG("Changing from alt %d to %d\n", cam->cur_alt, USBIF_CMDONLY);
482 ret = usb_set_interface(cam->dev, cam->iface, USBIF_CMDONLY);
483 if (ret != 0)
484 return ret;
485 }
486 if (alt != USBIF_CMDONLY) {
487 DBG("Changing from alt %d to %d\n", USBIF_CMDONLY, alt);
488 ret = usb_set_interface(cam->dev, cam->iface, alt);
489 if (ret != 0)
490 return ret;
491 }
492
493 cam->old_alt = cam->cur_alt;
494 cam->cur_alt = alt;
495
496 return ret;
497 }
498
499 /******************************************************************************
500 *
501 * free_sbufs
502 *
503 * Free all cam->sbuf[]. All non-NULL .data and .urb members that are non-NULL
504 * are assumed to be allocated. Non-NULL .urb members are also assumed to be
505 * submitted (and must therefore be killed before they are freed).
506 *****************************************************************************/
507 static void free_sbufs(struct camera_data *cam)
508 {
509 int i;
510
511 for (i = 0; i < NUM_SBUF; i++) {
512 if(cam->sbuf[i].urb) {
513 usb_kill_urb(cam->sbuf[i].urb);
514 usb_free_urb(cam->sbuf[i].urb);
515 cam->sbuf[i].urb = NULL;
516 }
517 if(cam->sbuf[i].data) {
518 kfree(cam->sbuf[i].data);
519 cam->sbuf[i].data = NULL;
520 }
521 }
522 }
523
524 /*******
525 * Convenience functions
526 *******/
527 /****************************************************************************
528 *
529 * write_packet
530 *
531 ***************************************************************************/
532 static int write_packet(struct usb_device *udev,
533 u8 request, u8 * registers, u16 start, size_t size)
534 {
535 unsigned char *buf;
536 int ret;
537
538 if (!registers || size <= 0)
539 return -EINVAL;
540
541 buf = kmemdup(registers, size, GFP_KERNEL);
542 if (!buf)
543 return -ENOMEM;
544
545 ret = usb_control_msg(udev,
546 usb_sndctrlpipe(udev, 0),
547 request,
548 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
549 start, /* value */
550 0, /* index */
551 buf, /* buffer */
552 size,
553 HZ);
554
555 kfree(buf);
556 return ret;
557 }
558
559 /****************************************************************************
560 *
561 * read_packet
562 *
563 ***************************************************************************/
564 static int read_packet(struct usb_device *udev,
565 u8 request, u8 * registers, u16 start, size_t size)
566 {
567 unsigned char *buf;
568 int ret;
569
570 if (!registers || size <= 0)
571 return -EINVAL;
572
573 buf = kmalloc(size, GFP_KERNEL);
574 if (!buf)
575 return -ENOMEM;
576
577 ret = usb_control_msg(udev,
578 usb_rcvctrlpipe(udev, 0),
579 request,
580 USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_DEVICE,
581 start, /* value */
582 0, /* index */
583 buf, /* buffer */
584 size,
585 HZ);
586
587 if (ret >= 0)
588 memcpy(registers, buf, size);
589
590 kfree(buf);
591
592 return ret;
593 }
594
595 /******************************************************************************
596 *
597 * cpia2_usb_transfer_cmd
598 *
599 *****************************************************************************/
600 int cpia2_usb_transfer_cmd(struct camera_data *cam,
601 void *registers,
602 u8 request, u8 start, u8 count, u8 direction)
603 {
604 int err = 0;
605 struct usb_device *udev = cam->dev;
606
607 if (!udev) {
608 ERR("%s: Internal driver error: udev is NULL\n", __func__);
609 return -EINVAL;
610 }
611
612 if (!registers) {
613 ERR("%s: Internal driver error: register array is NULL\n", __func__);
614 return -EINVAL;
615 }
616
617 if (direction == TRANSFER_READ) {
618 err = read_packet(udev, request, (u8 *)registers, start, count);
619 if (err > 0)
620 err = 0;
621 } else if (direction == TRANSFER_WRITE) {
622 err =write_packet(udev, request, (u8 *)registers, start, count);
623 if (err < 0) {
624 LOG("Control message failed, err val = %d\n", err);
625 LOG("Message: request = 0x%0X, start = 0x%0X\n",
626 request, start);
627 LOG("Message: count = %d, register[0] = 0x%0X\n",
628 count, ((unsigned char *) registers)[0]);
629 } else
630 err=0;
631 } else {
632 LOG("Unexpected first byte of direction: %d\n",
633 direction);
634 return -EINVAL;
635 }
636
637 if(err != 0)
638 LOG("Unexpected error: %d\n", err);
639 return err;
640 }
641
642
643 /******************************************************************************
644 *
645 * submit_urbs
646 *
647 *****************************************************************************/
648 static int submit_urbs(struct camera_data *cam)
649 {
650 struct urb *urb;
651 int fx, err, i, j;
652
653 for(i=0; i<NUM_SBUF; ++i) {
654 if (cam->sbuf[i].data)
655 continue;
656 cam->sbuf[i].data =
657 kmalloc_array(FRAME_SIZE_PER_DESC, FRAMES_PER_DESC,
658 GFP_KERNEL);
659 if (!cam->sbuf[i].data) {
660 while (--i >= 0) {
661 kfree(cam->sbuf[i].data);
662 cam->sbuf[i].data = NULL;
663 }
664 return -ENOMEM;
665 }
666 }
667
668 /* We double buffer the Isoc lists, and also know the polling
669 * interval is every frame (1 == (1 << (bInterval -1))).
670 */
671 for(i=0; i<NUM_SBUF; ++i) {
672 if(cam->sbuf[i].urb) {
673 continue;
674 }
675 urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
676 if (!urb) {
677 for (j = 0; j < i; j++)
678 usb_free_urb(cam->sbuf[j].urb);
679 for (j = 0; j < NUM_SBUF; j++) {
680 kfree(cam->sbuf[j].data);
681 cam->sbuf[j].data = NULL;
682 }
683 return -ENOMEM;
684 }
685
686 cam->sbuf[i].urb = urb;
687 urb->dev = cam->dev;
688 urb->context = cam;
689 urb->pipe = usb_rcvisocpipe(cam->dev, 1 /*ISOC endpoint*/);
690 urb->transfer_flags = URB_ISO_ASAP;
691 urb->transfer_buffer = cam->sbuf[i].data;
692 urb->complete = cpia2_usb_complete;
693 urb->number_of_packets = FRAMES_PER_DESC;
694 urb->interval = 1;
695 urb->transfer_buffer_length =
696 FRAME_SIZE_PER_DESC * FRAMES_PER_DESC;
697
698 for (fx = 0; fx < FRAMES_PER_DESC; fx++) {
699 urb->iso_frame_desc[fx].offset =
700 FRAME_SIZE_PER_DESC * fx;
701 urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC;
702 }
703 }
704
705
706 /* Queue the ISO urbs, and resubmit in the completion handler */
707 for(i=0; i<NUM_SBUF; ++i) {
708 err = usb_submit_urb(cam->sbuf[i].urb, GFP_KERNEL);
709 if (err) {
710 ERR("usb_submit_urb[%d]() = %d\n", i, err);
711 return err;
712 }
713 }
714
715 return 0;
716 }
717
718 /******************************************************************************
719 *
720 * cpia2_usb_stream_start
721 *
722 *****************************************************************************/
723 int cpia2_usb_stream_start(struct camera_data *cam, unsigned int alternate)
724 {
725 int ret;
726 int old_alt;
727
728 if(cam->streaming)
729 return 0;
730
731 if (cam->flush) {
732 int i;
733 DBG("Flushing buffers\n");
734 for(i=0; i<cam->num_frames; ++i) {
735 cam->buffers[i].status = FRAME_EMPTY;
736 cam->buffers[i].length = 0;
737 }
738 cam->curbuff = &cam->buffers[0];
739 cam->workbuff = cam->curbuff->next;
740 cam->flush = false;
741 }
742
743 old_alt = cam->params.camera_state.stream_mode;
744 cam->params.camera_state.stream_mode = 0;
745 ret = cpia2_usb_change_streaming_alternate(cam, alternate);
746 if (ret < 0) {
747 int ret2;
748 ERR("cpia2_usb_change_streaming_alternate() = %d!\n", ret);
749 cam->params.camera_state.stream_mode = old_alt;
750 ret2 = set_alternate(cam, USBIF_CMDONLY);
751 if (ret2 < 0) {
752 ERR("cpia2_usb_change_streaming_alternate(%d) =%d has already failed. Then tried to call set_alternate(USBIF_CMDONLY) = %d.\n",
753 alternate, ret, ret2);
754 }
755 } else {
756 cam->frame_count = 0;
757 cam->streaming = 1;
758 ret = cpia2_usb_stream_resume(cam);
759 }
760 return ret;
761 }
762
763 /******************************************************************************
764 *
765 * cpia2_usb_stream_pause
766 *
767 *****************************************************************************/
768 int cpia2_usb_stream_pause(struct camera_data *cam)
769 {
770 int ret = 0;
771 if(cam->streaming) {
772 free_sbufs(cam);
773 ret = set_alternate(cam, USBIF_CMDONLY);
774 }
775 return ret;
776 }
777
778 /******************************************************************************
779 *
780 * cpia2_usb_stream_resume
781 *
782 *****************************************************************************/
783 int cpia2_usb_stream_resume(struct camera_data *cam)
784 {
785 int ret = 0;
786 if(cam->streaming) {
787 cam->first_image_seen = 0;
788 ret = set_alternate(cam, cam->params.camera_state.stream_mode);
789 if(ret == 0) {
790 /* for some reason the user effects need to be set
791 again when starting streaming. */
792 cpia2_do_command(cam, CPIA2_CMD_SET_USER_EFFECTS, TRANSFER_WRITE,
793 cam->params.vp_params.user_effects);
794 ret = submit_urbs(cam);
795 }
796 }
797 return ret;
798 }
799
800 /******************************************************************************
801 *
802 * cpia2_usb_stream_stop
803 *
804 *****************************************************************************/
805 int cpia2_usb_stream_stop(struct camera_data *cam)
806 {
807 int ret;
808
809 ret = cpia2_usb_stream_pause(cam);
810 cam->streaming = 0;
811 configure_transfer_mode(cam, 0);
812 return ret;
813 }
814
815 /******************************************************************************
816 *
817 * cpia2_usb_probe
818 *
819 * Probe and initialize.
820 *****************************************************************************/
821 static int cpia2_usb_probe(struct usb_interface *intf,
822 const struct usb_device_id *id)
823 {
824 struct usb_device *udev = interface_to_usbdev(intf);
825 struct usb_interface_descriptor *interface;
826 struct camera_data *cam;
827 int ret;
828
829 /* A multi-config CPiA2 camera? */
830 if (udev->descriptor.bNumConfigurations != 1)
831 return -ENODEV;
832 interface = &intf->cur_altsetting->desc;
833
834 /* If we get to this point, we found a CPiA2 camera */
835 LOG("CPiA2 USB camera found\n");
836
837 cam = cpia2_init_camera_struct(intf);
838 if (cam == NULL)
839 return -ENOMEM;
840
841 cam->dev = udev;
842 cam->iface = interface->bInterfaceNumber;
843
844 ret = set_alternate(cam, USBIF_CMDONLY);
845 if (ret < 0) {
846 ERR("%s: usb_set_interface error (ret = %d)\n", __func__, ret);
847 kfree(cam);
848 return ret;
849 }
850
851
852 if((ret = cpia2_init_camera(cam)) < 0) {
853 ERR("%s: failed to initialize cpia2 camera (ret = %d)\n", __func__, ret);
854 kfree(cam);
855 return ret;
856 }
857 LOG(" CPiA Version: %d.%02d (%d.%d)\n",
858 cam->params.version.firmware_revision_hi,
859 cam->params.version.firmware_revision_lo,
860 cam->params.version.asic_id,
861 cam->params.version.asic_rev);
862 LOG(" CPiA PnP-ID: %04x:%04x:%04x\n",
863 cam->params.pnp_id.vendor,
864 cam->params.pnp_id.product,
865 cam->params.pnp_id.device_revision);
866 LOG(" SensorID: %d.(version %d)\n",
867 cam->params.version.sensor_flags,
868 cam->params.version.sensor_rev);
869
870 usb_set_intfdata(intf, cam);
871
872 ret = cpia2_register_camera(cam);
873 if (ret < 0) {
874 ERR("%s: Failed to register cpia2 camera (ret = %d)\n", __func__, ret);
875 kfree(cam);
876 return ret;
877 }
878
879 return 0;
880 }
881
882 /******************************************************************************
883 *
884 * cpia2_disconnect
885 *
886 *****************************************************************************/
887 static void cpia2_usb_disconnect(struct usb_interface *intf)
888 {
889 struct camera_data *cam = usb_get_intfdata(intf);
890 usb_set_intfdata(intf, NULL);
891
892 DBG("Stopping stream\n");
893 cpia2_usb_stream_stop(cam);
894
895 mutex_lock(&cam->v4l2_lock);
896 DBG("Unregistering camera\n");
897 cpia2_unregister_camera(cam);
898 v4l2_device_disconnect(&cam->v4l2_dev);
899 mutex_unlock(&cam->v4l2_lock);
900
901 if(cam->buffers) {
902 DBG("Wakeup waiting processes\n");
903 cam->curbuff->status = FRAME_READY;
904 cam->curbuff->length = 0;
905 wake_up_interruptible(&cam->wq_stream);
906 }
907
908 v4l2_device_put(&cam->v4l2_dev);
909
910 LOG("CPiA2 camera disconnected.\n");
911 }
912
913 static int cpia2_usb_suspend(struct usb_interface *intf, pm_message_t message)
914 {
915 struct camera_data *cam = usb_get_intfdata(intf);
916
917 mutex_lock(&cam->v4l2_lock);
918 if (cam->streaming) {
919 cpia2_usb_stream_stop(cam);
920 cam->streaming = 1;
921 }
922 mutex_unlock(&cam->v4l2_lock);
923
924 dev_info(&intf->dev, "going into suspend..\n");
925 return 0;
926 }
927
928 /* Resume device - start device. */
929 static int cpia2_usb_resume(struct usb_interface *intf)
930 {
931 struct camera_data *cam = usb_get_intfdata(intf);
932
933 mutex_lock(&cam->v4l2_lock);
934 v4l2_ctrl_handler_setup(&cam->hdl);
935 if (cam->streaming) {
936 cam->streaming = 0;
937 cpia2_usb_stream_start(cam,
938 cam->params.camera_state.stream_mode);
939 }
940 mutex_unlock(&cam->v4l2_lock);
941
942 dev_info(&intf->dev, "coming out of suspend..\n");
943 return 0;
944 }
945
946 /******************************************************************************
947 *
948 * usb_cpia2_init
949 *
950 *****************************************************************************/
951 int cpia2_usb_init(void)
952 {
953 return usb_register(&cpia2_driver);
954 }
955
956 /******************************************************************************
957 *
958 * usb_cpia_cleanup
959 *
960 *****************************************************************************/
961 void cpia2_usb_cleanup(void)
962 {
963 schedule_timeout(2 * HZ);
964 usb_deregister(&cpia2_driver);
965 }
Linux with added FPC-III support