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[linux-rt-nao.git] / drivers / media / video / gspca / stv06xx / stv06xx.c
blob13a021e3cbb7b5d5f613688ca7880a8dac232bae
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 (IS_850(sd)) {
96 struct usb_device *udev = sd->gspca_dev.dev;
97 __u8 *buf = sd->gspca_dev.usb_buf;
98
99 /* Quickam Web needs an extra packet */
100 buf[0] = 0;
101 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
102 0x04, 0x40, 0x1704, 0, buf, 1,
103 STV06XX_URB_MSG_TIMEOUT);
104 }
105
106 return (err < 0) ? err : 0;
107 }
108
109 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
110 {
111 int err, i, j;
112 struct usb_device *udev = sd->gspca_dev.dev;
113 __u8 *buf = sd->gspca_dev.usb_buf;
114
115 PDEBUG(D_USBO, "I2C: Command buffer contains %d entries", len);
116 for (i = 0; i < len;) {
117 /* Build the command buffer */
118 memset(buf, 0, I2C_BUFFER_LENGTH);
119 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
120 buf[j] = data[2*i];
121 buf[0x10 + j] = data[2*i+1];
122 PDEBUG(D_USBO, "I2C: Writing 0x%02x to reg 0x%02x",
123 data[2*i+1], data[2*i]);
124 }
125 buf[0x20] = sd->sensor->i2c_addr;
126 buf[0x21] = j - 1; /* Number of commands to send - 1 */
127 buf[0x22] = I2C_WRITE_CMD;
128 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
129 0x04, 0x40, 0x0400, 0, buf,
130 I2C_BUFFER_LENGTH,
131 STV06XX_URB_MSG_TIMEOUT);
132 if (err < 0)
133 return err;
134 }
135 return stv06xx_write_sensor_finish(sd);
136 }
137
138 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
139 {
140 int err, i, j;
141 struct usb_device *udev = sd->gspca_dev.dev;
142 __u8 *buf = sd->gspca_dev.usb_buf;
143
144 PDEBUG(D_USBO, "I2C: Command buffer contains %d entries", len);
145
146 for (i = 0; i < len;) {
147 /* Build the command buffer */
148 memset(buf, 0, I2C_BUFFER_LENGTH);
149 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
150 buf[j] = data[2*i];
151 buf[0x10 + j * 2] = data[2*i+1];
152 buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
153 PDEBUG(D_USBO, "I2C: Writing 0x%04x to reg 0x%02x",
154 data[2*i+1], data[2*i]);
155 }
156 buf[0x20] = sd->sensor->i2c_addr;
157 buf[0x21] = j - 1; /* Number of commands to send - 1 */
158 buf[0x22] = I2C_WRITE_CMD;
159 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
160 0x04, 0x40, 0x0400, 0, buf,
161 I2C_BUFFER_LENGTH,
162 STV06XX_URB_MSG_TIMEOUT);
163 if (err < 0)
164 return err;
165 }
166 return stv06xx_write_sensor_finish(sd);
167 }
168
169 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
170 {
171 int err;
172 struct usb_device *udev = sd->gspca_dev.dev;
173 __u8 *buf = sd->gspca_dev.usb_buf;
174
175 err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
176 if (err < 0)
177 return err;
178
179 /* Clear mem */
180 memset(buf, 0, I2C_BUFFER_LENGTH);
181
182 buf[0] = address;
183 buf[0x20] = sd->sensor->i2c_addr;
184 buf[0x21] = 0;
185
186 /* Read I2C register */
187 buf[0x22] = I2C_READ_CMD;
188
189 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
190 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
191 STV06XX_URB_MSG_TIMEOUT);
192 if (err < 0) {
193 PDEBUG(D_ERR, "I2C Read: error writing address: %d", err);
194 return err;
195 }
196
197 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
198 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
199 STV06XX_URB_MSG_TIMEOUT);
200 if (sd->sensor->i2c_len == 2)
201 *value = buf[0] | (buf[1] << 8);
202 else
203 *value = buf[0];
204
205 PDEBUG(D_USBO, "I2C: Read 0x%x from address 0x%x, status: %d",
206 *value, address, err);
207
208 return (err < 0) ? err : 0;
209 }
210
211 /* Dumps all bridge registers */
212 static void stv06xx_dump_bridge(struct sd *sd)
213 {
214 int i;
215 u8 data, buf;
216
217 info("Dumping all stv06xx bridge registers");
218 for (i = 0x1400; i < 0x160f; i++) {
219 stv06xx_read_bridge(sd, i, &data);
220
221 info("Read 0x%x from address 0x%x", data, i);
222 }
223
224 for (i = 0x1400; i < 0x160f; i++) {
225 stv06xx_read_bridge(sd, i, &data);
226 buf = data;
227
228 stv06xx_write_bridge(sd, i, 0xff);
229 stv06xx_read_bridge(sd, i, &data);
230 if (data == 0xff)
231 info("Register 0x%x is read/write", i);
232 else if (data != buf)
233 info("Register 0x%x is read/write,"
234 "but only partially", i);
235 else
236 info("Register 0x%x is read-only", i);
237
238 stv06xx_write_bridge(sd, i, buf);
239 }
240 }
241
242 /* this function is called at probe and resume time */
243 static int stv06xx_init(struct gspca_dev *gspca_dev)
244 {
245 struct sd *sd = (struct sd *) gspca_dev;
246 int err;
247
248 PDEBUG(D_PROBE, "Initializing camera");
249
250 /* Let the usb init settle for a bit
251 before performing the initialization */
252 msleep(250);
253
254 err = sd->sensor->init(sd);
255
256 if (dump_sensor)
257 sd->sensor->dump(sd);
258
259 return (err < 0) ? err : 0;
260 }
261
262 /* Start the camera */
263 static int stv06xx_start(struct gspca_dev *gspca_dev)
264 {
265 struct sd *sd = (struct sd *) gspca_dev;
266 int err;
267
268 /* Prepare the sensor for start */
269 err = sd->sensor->start(sd);
270 if (err < 0)
271 goto out;
272
273 /* Start isochronous streaming */
274 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
275
276 out:
277 if (err < 0)
278 PDEBUG(D_STREAM, "Starting stream failed");
279 else
280 PDEBUG(D_STREAM, "Started streaming");
281
282 return (err < 0) ? err : 0;
283 }
284
285 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
286 {
287 int err;
288 struct sd *sd = (struct sd *) gspca_dev;
289
290 /* stop ISO-streaming */
291 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
292 if (err < 0)
293 goto out;
294
295 err = sd->sensor->stop(sd);
296 if (err < 0)
297 goto out;
298
299 out:
300 if (err < 0)
301 PDEBUG(D_STREAM, "Failed to stop stream");
302 else
303 PDEBUG(D_STREAM, "Stopped streaming");
304 }
305
306 /*
307 * Analyse an USB packet of the data stream and store it appropriately.
308 * Each packet contains an integral number of chunks. Each chunk has
309 * 2-bytes identification, followed by 2-bytes that describe the chunk
310 * length. Known/guessed chunk identifications are:
311 * 8001/8005/C001/C005 - Begin new frame
312 * 8002/8006/C002/C006 - End frame
313 * 0200/4200 - Contains actual image data, bayer or compressed
314 * 0005 - 11 bytes of unknown data
315 * 0100 - 2 bytes of unknown data
316 * The 0005 and 0100 chunks seem to appear only in compressed stream.
317 */
318 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
319 struct gspca_frame *frame, /* target */
320 __u8 *data, /* isoc packet */
321 int len) /* iso packet length */
322 {
323 PDEBUG(D_PACK, "Packet of length %d arrived", len);
324
325 /* A packet may contain several frames
326 loop until the whole packet is reached */
327 while (len) {
328 int id, chunk_len;
329
330 if (len < 4) {
331 PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
332 return;
333 }
334
335 /* Capture the id */
336 id = (data[0] << 8) | data[1];
337
338 /* Capture the chunk length */
339 chunk_len = (data[2] << 8) | data[3];
340 PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
341
342 data += 4;
343 len -= 4;
344
345 if (len < chunk_len) {
346 PDEBUG(D_ERR, "URB packet length is smaller"
347 " than the specified chunk length");
348 return;
349 }
350
351 switch (id) {
352 case 0x0200:
353 case 0x4200:
354 PDEBUG(D_PACK, "Frame data packet detected");
355
356 gspca_frame_add(gspca_dev, INTER_PACKET, frame,
357 data, chunk_len);
358 break;
359
360 case 0x8001:
361 case 0x8005:
362 case 0xc001:
363 case 0xc005:
364 PDEBUG(D_PACK, "Starting new frame");
365
366 /* Create a new frame, chunk length should be zero */
367 gspca_frame_add(gspca_dev, FIRST_PACKET,
368 frame, data, 0);
369
370 if (chunk_len)
371 PDEBUG(D_ERR, "Chunk length is "
372 "non-zero on a SOF");
373 break;
374
375 case 0x8002:
376 case 0x8006:
377 case 0xc002:
378 PDEBUG(D_PACK, "End of frame detected");
379
380 /* Complete the last frame (if any) */
381 gspca_frame_add(gspca_dev, LAST_PACKET, frame, data, 0);
382
383 if (chunk_len)
384 PDEBUG(D_ERR, "Chunk length is "
385 "non-zero on a EOF");
386 break;
387
388 case 0x0005:
389 PDEBUG(D_PACK, "Chunk 0x005 detected");
390 /* Unknown chunk with 11 bytes of data,
391 occurs just before end of each frame
392 in compressed mode */
393 break;
394
395 case 0x0100:
396 PDEBUG(D_PACK, "Chunk 0x0100 detected");
397 /* Unknown chunk with 2 bytes of data,
398 occurs 2-3 times per USB interrupt */
399 break;
400 default:
401 PDEBUG(D_PACK, "Unknown chunk %d detected", id);
402 /* Unknown chunk */
403 }
404 data += chunk_len;
405 len -= chunk_len;
406 }
407 }
408
409 static int stv06xx_config(struct gspca_dev *gspca_dev,
410 const struct usb_device_id *id);
411
412 /* sub-driver description */
413 static const struct sd_desc sd_desc = {
414 .name = MODULE_NAME,
415 .config = stv06xx_config,
416 .init = stv06xx_init,
417 .start = stv06xx_start,
418 .stopN = stv06xx_stopN,
419 .pkt_scan = stv06xx_pkt_scan
420 };
421
422 /* This function is called at probe time */
423 static int stv06xx_config(struct gspca_dev *gspca_dev,
424 const struct usb_device_id *id)
425 {
426 struct sd *sd = (struct sd *) gspca_dev;
427 struct cam *cam;
428
429 PDEBUG(D_PROBE, "Configuring camera");
430
431 cam = &gspca_dev->cam;
432 cam->epaddr = STV_ISOC_ENDPOINT_ADDR;
433 sd->desc = sd_desc;
434 gspca_dev->sd_desc = &sd->desc;
435
436 if (dump_bridge)
437 stv06xx_dump_bridge(sd);
438
439 sd->sensor = &stv06xx_sensor_vv6410;
440 if (!sd->sensor->probe(sd))
441 return 0;
442
443 sd->sensor = &stv06xx_sensor_hdcs1x00;
444 if (!sd->sensor->probe(sd))
445 return 0;
446
447 sd->sensor = &stv06xx_sensor_hdcs1020;
448 if (!sd->sensor->probe(sd))
449 return 0;
450
451 sd->sensor = &stv06xx_sensor_pb0100;
452 if (!sd->sensor->probe(sd))
453 return 0;
454
455 sd->sensor = NULL;
456 return -ENODEV;
457 }
458
459
460
461 /* -- module initialisation -- */
462 static const __devinitdata struct usb_device_id device_table[] = {
463 {USB_DEVICE(0x046d, 0x0840)}, /* QuickCam Express */
464 {USB_DEVICE(0x046d, 0x0850)}, /* LEGO cam / QuickCam Web */
465 {USB_DEVICE(0x046d, 0x0870)}, /* Dexxa WebCam USB */
466 {}
467 };
468 MODULE_DEVICE_TABLE(usb, device_table);
469
470 /* -- device connect -- */
471 static int sd_probe(struct usb_interface *intf,
472 const struct usb_device_id *id)
473 {
474 PDEBUG(D_PROBE, "Probing for a stv06xx device");
475 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
476 THIS_MODULE);
477 }
478
479 static void sd_disconnect(struct usb_interface *intf)
480 {
481 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
482 struct sd *sd = (struct sd *) gspca_dev;
483 PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
484
485 if (sd->sensor->disconnect)
486 sd->sensor->disconnect(sd);
487 gspca_disconnect(intf);
488 }
489
490 static struct usb_driver sd_driver = {
491 .name = MODULE_NAME,
492 .id_table = device_table,
493 .probe = sd_probe,
494 .disconnect = sd_disconnect,
495 #ifdef CONFIG_PM
496 .suspend = gspca_suspend,
497 .resume = gspca_resume,
498 #endif
499 };
500
501 /* -- module insert / remove -- */
502 static int __init sd_mod_init(void)
503 {
504 if (usb_register(&sd_driver) < 0)
505 return -1;
506 PDEBUG(D_PROBE, "registered");
507 return 0;
508 }
509 static void __exit sd_mod_exit(void)
510 {
511 usb_deregister(&sd_driver);
512 PDEBUG(D_PROBE, "deregistered");
513 }
514
515 module_init(sd_mod_init);
516 module_exit(sd_mod_exit);
517
518 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
519 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
520
521 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
522 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");
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