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V4L/DVB (12471): stv06xx: fix bad whitespaces
[linux-2.6/linux-2.6-openrd.git] / drivers / media / video / gspca / stv06xx / stv06xx.c
blob7af511b5e9c26a849aa9db63b591e6b078cc2cbc
1 /*
2 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
3 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
4 * Copyright (c) 2002, 2003 Tuukka Toivonen
5 * Copyright (c) 2008 Erik Andrén
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * P/N 861037: Sensor HDCS1000 ASIC STV0600
22 * P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
23 * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
24 * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
25 * P/N 861075-0040: Sensor HDCS1000 ASIC
26 * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
27 * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
28 */
29
30 #include "stv06xx_sensor.h"
31
32 MODULE_AUTHOR("Erik Andrén");
33 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
34 MODULE_LICENSE("GPL");
35
36 static int dump_bridge;
37 static int dump_sensor;
38
39 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
40 {
41 int err;
42 struct usb_device *udev = sd->gspca_dev.dev;
43 __u8 *buf = sd->gspca_dev.usb_buf;
44 u8 len = (i2c_data > 0xff) ? 2 : 1;
45
46 buf[0] = i2c_data & 0xff;
47 buf[1] = (i2c_data >> 8) & 0xff;
48
49 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
50 0x04, 0x40, address, 0, buf, len,
51 STV06XX_URB_MSG_TIMEOUT);
52
53
54 PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
55 i2c_data, address, err);
56
57 return (err < 0) ? err : 0;
58 }
59
60 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
61 {
62 int err;
63 struct usb_device *udev = sd->gspca_dev.dev;
64 __u8 *buf = sd->gspca_dev.usb_buf;
65
66 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
67 0x04, 0xc0, address, 0, buf, 1,
68 STV06XX_URB_MSG_TIMEOUT);
69
70 *i2c_data = buf[0];
71
72 PDEBUG(D_CONF, "Read 0x%x from address 0x%x, status %d",
73 *i2c_data, address, err);
74
75 return (err < 0) ? err : 0;
76 }
77
78 /* Wraps the normal write sensor bytes / words functions for writing a
79 single value */
80 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
81 {
82 if (sd->sensor->i2c_len == 2) {
83 u16 data[2] = { address, value };
84 return stv06xx_write_sensor_words(sd, data, 1);
85 } else {
86 u8 data[2] = { address, value };
87 return stv06xx_write_sensor_bytes(sd, data, 1);
88 }
89 }
90
91 static int stv06xx_write_sensor_finish(struct sd *sd)
92 {
93 int err = 0;
94
95 if (sd->bridge == BRIDGE_STV610) {
96 struct usb_device *udev = sd->gspca_dev.dev;
97 __u8 *buf = sd->gspca_dev.usb_buf;
98
99 buf[0] = 0;
100 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
101 0x04, 0x40, 0x1704, 0, buf, 1,
102 STV06XX_URB_MSG_TIMEOUT);
103 }
104
105 return (err < 0) ? err : 0;
106 }
107
108 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
109 {
110 int err, i, j;
111 struct usb_device *udev = sd->gspca_dev.dev;
112 __u8 *buf = sd->gspca_dev.usb_buf;
113
114 PDEBUG(D_USBO, "I2C: Command buffer contains %d entries", len);
115 for (i = 0; i < len;) {
116 /* Build the command buffer */
117 memset(buf, 0, I2C_BUFFER_LENGTH);
118 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
119 buf[j] = data[2*i];
120 buf[0x10 + j] = data[2*i+1];
121 PDEBUG(D_USBO, "I2C: Writing 0x%02x to reg 0x%02x",
122 data[2*i+1], data[2*i]);
123 }
124 buf[0x20] = sd->sensor->i2c_addr;
125 buf[0x21] = j - 1; /* Number of commands to send - 1 */
126 buf[0x22] = I2C_WRITE_CMD;
127 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
128 0x04, 0x40, 0x0400, 0, buf,
129 I2C_BUFFER_LENGTH,
130 STV06XX_URB_MSG_TIMEOUT);
131 if (err < 0)
132 return err;
133 }
134 return stv06xx_write_sensor_finish(sd);
135 }
136
137 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
138 {
139 int err, i, j;
140 struct usb_device *udev = sd->gspca_dev.dev;
141 __u8 *buf = sd->gspca_dev.usb_buf;
142
143 PDEBUG(D_USBO, "I2C: Command buffer contains %d entries", len);
144
145 for (i = 0; i < len;) {
146 /* Build the command buffer */
147 memset(buf, 0, I2C_BUFFER_LENGTH);
148 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
149 buf[j] = data[2*i];
150 buf[0x10 + j * 2] = data[2*i+1];
151 buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
152 PDEBUG(D_USBO, "I2C: Writing 0x%04x to reg 0x%02x",
153 data[2*i+1], data[2*i]);
154 }
155 buf[0x20] = sd->sensor->i2c_addr;
156 buf[0x21] = j - 1; /* Number of commands to send - 1 */
157 buf[0x22] = I2C_WRITE_CMD;
158 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
159 0x04, 0x40, 0x0400, 0, buf,
160 I2C_BUFFER_LENGTH,
161 STV06XX_URB_MSG_TIMEOUT);
162 if (err < 0)
163 return err;
164 }
165 return stv06xx_write_sensor_finish(sd);
166 }
167
168 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
169 {
170 int err;
171 struct usb_device *udev = sd->gspca_dev.dev;
172 __u8 *buf = sd->gspca_dev.usb_buf;
173
174 err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
175 if (err < 0)
176 return err;
177
178 /* Clear mem */
179 memset(buf, 0, I2C_BUFFER_LENGTH);
180
181 buf[0] = address;
182 buf[0x20] = sd->sensor->i2c_addr;
183 buf[0x21] = 0;
184
185 /* Read I2C register */
186 buf[0x22] = I2C_READ_CMD;
187
188 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
189 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
190 STV06XX_URB_MSG_TIMEOUT);
191 if (err < 0) {
192 PDEBUG(D_ERR, "I2C Read: error writing address: %d", err);
193 return err;
194 }
195
196 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
197 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
198 STV06XX_URB_MSG_TIMEOUT);
199 if (sd->sensor->i2c_len == 2)
200 *value = buf[0] | (buf[1] << 8);
201 else
202 *value = buf[0];
203
204 PDEBUG(D_USBO, "I2C: Read 0x%x from address 0x%x, status: %d",
205 *value, address, err);
206
207 return (err < 0) ? err : 0;
208 }
209
210 /* Dumps all bridge registers */
211 static void stv06xx_dump_bridge(struct sd *sd)
212 {
213 int i;
214 u8 data, buf;
215
216 info("Dumping all stv06xx bridge registers");
217 for (i = 0x1400; i < 0x160f; i++) {
218 stv06xx_read_bridge(sd, i, &data);
219
220 info("Read 0x%x from address 0x%x", data, i);
221 }
222
223 for (i = 0x1400; i < 0x160f; i++) {
224 stv06xx_read_bridge(sd, i, &data);
225 buf = data;
226
227 stv06xx_write_bridge(sd, i, 0xff);
228 stv06xx_read_bridge(sd, i, &data);
229 if (data == 0xff)
230 info("Register 0x%x is read/write", i);
231 else if (data != buf)
232 info("Register 0x%x is read/write,"
233 "but only partially", i);
234 else
235 info("Register 0x%x is read-only", i);
236
237 stv06xx_write_bridge(sd, i, buf);
238 }
239 }
240
241 /* this function is called at probe and resume time */
242 static int stv06xx_init(struct gspca_dev *gspca_dev)
243 {
244 struct sd *sd = (struct sd *) gspca_dev;
245 int err;
246
247 PDEBUG(D_PROBE, "Initializing camera");
248
249 /* Let the usb init settle for a bit
250 before performing the initialization */
251 msleep(250);
252
253 err = sd->sensor->init(sd);
254
255 if (dump_sensor && sd->sensor->dump)
256 sd->sensor->dump(sd);
257
258 return (err < 0) ? err : 0;
259 }
260
261 /* Start the camera */
262 static int stv06xx_start(struct gspca_dev *gspca_dev)
263 {
264 struct sd *sd = (struct sd *) gspca_dev;
265 int err;
266
267 /* Prepare the sensor for start */
268 err = sd->sensor->start(sd);
269 if (err < 0)
270 goto out;
271
272 /* Start isochronous streaming */
273 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
274
275 out:
276 if (err < 0)
277 PDEBUG(D_STREAM, "Starting stream failed");
278 else
279 PDEBUG(D_STREAM, "Started streaming");
280
281 return (err < 0) ? err : 0;
282 }
283
284 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
285 {
286 int err;
287 struct sd *sd = (struct sd *) gspca_dev;
288
289 /* stop ISO-streaming */
290 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
291 if (err < 0)
292 goto out;
293
294 err = sd->sensor->stop(sd);
295
296 out:
297 if (err < 0)
298 PDEBUG(D_STREAM, "Failed to stop stream");
299 else
300 PDEBUG(D_STREAM, "Stopped streaming");
301 }
302
303 /*
304 * Analyse an USB packet of the data stream and store it appropriately.
305 * Each packet contains an integral number of chunks. Each chunk has
306 * 2-bytes identification, followed by 2-bytes that describe the chunk
307 * length. Known/guessed chunk identifications are:
308 * 8001/8005/C001/C005 - Begin new frame
309 * 8002/8006/C002/C006 - End frame
310 * 0200/4200 - Contains actual image data, bayer or compressed
311 * 0005 - 11 bytes of unknown data
312 * 0100 - 2 bytes of unknown data
313 * The 0005 and 0100 chunks seem to appear only in compressed stream.
314 */
315 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
316 struct gspca_frame *frame, /* target */
317 __u8 *data, /* isoc packet */
318 int len) /* iso packet length */
319 {
320 struct sd *sd = (struct sd *) gspca_dev;
321
322 PDEBUG(D_PACK, "Packet of length %d arrived", len);
323
324 /* A packet may contain several frames
325 loop until the whole packet is reached */
326 while (len) {
327 int id, chunk_len;
328
329 if (len < 4) {
330 PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
331 return;
332 }
333
334 /* Capture the id */
335 id = (data[0] << 8) | data[1];
336
337 /* Capture the chunk length */
338 chunk_len = (data[2] << 8) | data[3];
339 PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
340
341 data += 4;
342 len -= 4;
343
344 if (len < chunk_len) {
345 PDEBUG(D_ERR, "URB packet length is smaller"
346 " than the specified chunk length");
347 gspca_dev->last_packet_type = DISCARD_PACKET;
348 return;
349 }
350
351 /* First byte seem to be 02=data 2nd byte is unknown??? */
352 if (sd->bridge == BRIDGE_ST6422 && (id & 0xFF00) == 0x0200)
353 goto frame_data;
354
355 switch (id) {
356 case 0x0200:
357 case 0x4200:
358 frame_data:
359 PDEBUG(D_PACK, "Frame data packet detected");
360
361 if (sd->to_skip) {
362 int skip = (sd->to_skip < chunk_len) ?
363 sd->to_skip : chunk_len;
364 data += skip;
365 len -= skip;
366 chunk_len -= skip;
367 sd->to_skip -= skip;
368 }
369
370 gspca_frame_add(gspca_dev, INTER_PACKET, frame,
371 data, chunk_len);
372 break;
373
374 case 0x8001:
375 case 0x8005:
376 case 0xc001:
377 case 0xc005:
378 PDEBUG(D_PACK, "Starting new frame");
379
380 /* Create a new frame, chunk length should be zero */
381 gspca_frame_add(gspca_dev, FIRST_PACKET,
382 frame, data, 0);
383
384 if (sd->bridge == BRIDGE_ST6422)
385 sd->to_skip = gspca_dev->width * 4;
386
387 if (chunk_len)
388 PDEBUG(D_ERR, "Chunk length is "
389 "non-zero on a SOF");
390 break;
391
392 case 0x8002:
393 case 0x8006:
394 case 0xc002:
395 PDEBUG(D_PACK, "End of frame detected");
396
397 /* Complete the last frame (if any) */
398 gspca_frame_add(gspca_dev, LAST_PACKET, frame, data, 0);
399
400 if (chunk_len)
401 PDEBUG(D_ERR, "Chunk length is "
402 "non-zero on a EOF");
403 break;
404
405 case 0x0005:
406 PDEBUG(D_PACK, "Chunk 0x005 detected");
407 /* Unknown chunk with 11 bytes of data,
408 occurs just before end of each frame
409 in compressed mode */
410 break;
411
412 case 0x0100:
413 PDEBUG(D_PACK, "Chunk 0x0100 detected");
414 /* Unknown chunk with 2 bytes of data,
415 occurs 2-3 times per USB interrupt */
416 break;
417 case 0x42ff:
418 PDEBUG(D_PACK, "Chunk 0x42ff detected");
419 /* Special chunk seen sometimes on the ST6422 */
420 break;
421 default:
422 PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
423 /* Unknown chunk */
424 }
425 data += chunk_len;
426 len -= chunk_len;
427 }
428 }
429
430 static int stv06xx_config(struct gspca_dev *gspca_dev,
431 const struct usb_device_id *id);
432
433 /* sub-driver description */
434 static const struct sd_desc sd_desc = {
435 .name = MODULE_NAME,
436 .config = stv06xx_config,
437 .init = stv06xx_init,
438 .start = stv06xx_start,
439 .stopN = stv06xx_stopN,
440 .pkt_scan = stv06xx_pkt_scan
441 };
442
443 /* This function is called at probe time */
444 static int stv06xx_config(struct gspca_dev *gspca_dev,
445 const struct usb_device_id *id)
446 {
447 struct sd *sd = (struct sd *) gspca_dev;
448 struct cam *cam;
449
450 PDEBUG(D_PROBE, "Configuring camera");
451
452 cam = &gspca_dev->cam;
453 sd->desc = sd_desc;
454 sd->bridge = id->driver_info;
455 gspca_dev->sd_desc = &sd->desc;
456
457 if (dump_bridge)
458 stv06xx_dump_bridge(sd);
459
460 sd->sensor = &stv06xx_sensor_st6422;
461 if (!sd->sensor->probe(sd))
462 return 0;
463
464 sd->sensor = &stv06xx_sensor_vv6410;
465 if (!sd->sensor->probe(sd))
466 return 0;
467
468 sd->sensor = &stv06xx_sensor_hdcs1x00;
469 if (!sd->sensor->probe(sd))
470 return 0;
471
472 sd->sensor = &stv06xx_sensor_hdcs1020;
473 if (!sd->sensor->probe(sd))
474 return 0;
475
476 sd->sensor = &stv06xx_sensor_pb0100;
477 if (!sd->sensor->probe(sd))
478 return 0;
479
480 sd->sensor = NULL;
481 return -ENODEV;
482 }
483
484
485
486 /* -- module initialisation -- */
487 static const __devinitdata struct usb_device_id device_table[] = {
488 /* QuickCam Express */
489 {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
490 /* LEGO cam / QuickCam Web */
491 {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
492 /* Dexxa WebCam USB */
493 {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
494 /* QuickCam Messenger */
495 {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
496 /* QuickCam Communicate */
497 {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
498 /* QuickCam Messenger (new) */
499 {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
500 /* QuickCam Messenger (new) */
501 {USB_DEVICE(0x046D, 0x08DA), .driver_info = BRIDGE_ST6422 },
502 {}
503 };
504 MODULE_DEVICE_TABLE(usb, device_table);
505
506 /* -- device connect -- */
507 static int sd_probe(struct usb_interface *intf,
508 const struct usb_device_id *id)
509 {
510 PDEBUG(D_PROBE, "Probing for a stv06xx device");
511 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
512 THIS_MODULE);
513 }
514
515 static void sd_disconnect(struct usb_interface *intf)
516 {
517 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
518 struct sd *sd = (struct sd *) gspca_dev;
519 PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
520
521 if (sd->sensor->disconnect)
522 sd->sensor->disconnect(sd);
523 gspca_disconnect(intf);
524 }
525
526 static struct usb_driver sd_driver = {
527 .name = MODULE_NAME,
528 .id_table = device_table,
529 .probe = sd_probe,
530 .disconnect = sd_disconnect,
531 #ifdef CONFIG_PM
532 .suspend = gspca_suspend,
533 .resume = gspca_resume,
534 #endif
535 };
536
537 /* -- module insert / remove -- */
538 static int __init sd_mod_init(void)
539 {
540 int ret;
541 ret = usb_register(&sd_driver);
542 if (ret < 0)
543 return ret;
544 PDEBUG(D_PROBE, "registered");
545 return 0;
546 }
547 static void __exit sd_mod_exit(void)
548 {
549 usb_deregister(&sd_driver);
550 PDEBUG(D_PROBE, "deregistered");
551 }
552
553 module_init(sd_mod_init);
554 module_exit(sd_mod_exit);
555
556 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
557 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
558
559 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
560 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");
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