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26#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28#include <linux/input.h>
29#include "stv06xx_sensor.h"
30
31MODULE_AUTHOR("Erik Andrén");
32MODULE_DESCRIPTION("STV06XX USB Camera Driver");
33MODULE_LICENSE("GPL");
34
35static bool dump_bridge;
36static bool dump_sensor;
37
38int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
39{
40 int err;
41 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
42 struct usb_device *udev = sd->gspca_dev.dev;
43 __u8 *buf = sd->gspca_dev.usb_buf;
44
45 u8 len = (i2c_data > 0xff) ? 2 : 1;
46
47 buf[0] = i2c_data & 0xff;
48 buf[1] = (i2c_data >> 8) & 0xff;
49
50 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
51 0x04, 0x40, address, 0, buf, len,
52 STV06XX_URB_MSG_TIMEOUT);
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
60int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
61{
62 int err;
63 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
64 struct usb_device *udev = sd->gspca_dev.dev;
65 __u8 *buf = sd->gspca_dev.usb_buf;
66
67 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
68 0x04, 0xc0, address, 0, buf, 1,
69 STV06XX_URB_MSG_TIMEOUT);
70
71 *i2c_data = buf[0];
72
73 PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
74 *i2c_data, address, err);
75
76 return (err < 0) ? err : 0;
77}
78
79
80
81int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
82{
83 if (sd->sensor->i2c_len == 2) {
84 u16 data[2] = { address, value };
85 return stv06xx_write_sensor_words(sd, data, 1);
86 } else {
87 u8 data[2] = { address, value };
88 return stv06xx_write_sensor_bytes(sd, data, 1);
89 }
90}
91
92static int stv06xx_write_sensor_finish(struct sd *sd)
93{
94 int err = 0;
95
96 if (sd->bridge == BRIDGE_STV610) {
97 struct usb_device *udev = sd->gspca_dev.dev;
98 __u8 *buf = sd->gspca_dev.usb_buf;
99
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
109int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
110{
111 int err, i, j;
112 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
113 struct usb_device *udev = sd->gspca_dev.dev;
114 __u8 *buf = sd->gspca_dev.usb_buf;
115
116 PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
117 for (i = 0; i < len;) {
118
119 memset(buf, 0, I2C_BUFFER_LENGTH);
120 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
121 buf[j] = data[2*i];
122 buf[0x10 + j] = data[2*i+1];
123 PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
124 data[2*i+1], data[2*i]);
125 }
126 buf[0x20] = sd->sensor->i2c_addr;
127 buf[0x21] = j - 1;
128 buf[0x22] = I2C_WRITE_CMD;
129 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
130 0x04, 0x40, 0x0400, 0, buf,
131 I2C_BUFFER_LENGTH,
132 STV06XX_URB_MSG_TIMEOUT);
133 if (err < 0)
134 return err;
135 }
136 return stv06xx_write_sensor_finish(sd);
137}
138
139int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
140{
141 int err, i, j;
142 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
143 struct usb_device *udev = sd->gspca_dev.dev;
144 __u8 *buf = sd->gspca_dev.usb_buf;
145
146 PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
147
148 for (i = 0; i < len;) {
149
150 memset(buf, 0, I2C_BUFFER_LENGTH);
151 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
152 buf[j] = data[2*i];
153 buf[0x10 + j * 2] = data[2*i+1];
154 buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
155 PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
156 data[2*i+1], data[2*i]);
157 }
158 buf[0x20] = sd->sensor->i2c_addr;
159 buf[0x21] = j - 1;
160 buf[0x22] = I2C_WRITE_CMD;
161 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
162 0x04, 0x40, 0x0400, 0, buf,
163 I2C_BUFFER_LENGTH,
164 STV06XX_URB_MSG_TIMEOUT);
165 if (err < 0)
166 return err;
167 }
168 return stv06xx_write_sensor_finish(sd);
169}
170
171int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
172{
173 int err;
174 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
175 struct usb_device *udev = sd->gspca_dev.dev;
176 __u8 *buf = sd->gspca_dev.usb_buf;
177
178 err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
179 if (err < 0)
180 return err;
181
182
183 memset(buf, 0, I2C_BUFFER_LENGTH);
184
185 buf[0] = address;
186 buf[0x20] = sd->sensor->i2c_addr;
187 buf[0x21] = 0;
188
189
190 buf[0x22] = I2C_READ_CMD;
191
192 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
193 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
194 STV06XX_URB_MSG_TIMEOUT);
195 if (err < 0) {
196 pr_err("I2C: Read error writing address: %d\n", err);
197 return err;
198 }
199
200 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
201 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
202 STV06XX_URB_MSG_TIMEOUT);
203 if (sd->sensor->i2c_len == 2)
204 *value = buf[0] | (buf[1] << 8);
205 else
206 *value = buf[0];
207
208 PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
209 *value, address, err);
210
211 return (err < 0) ? err : 0;
212}
213
214
215static void stv06xx_dump_bridge(struct sd *sd)
216{
217 int i;
218 u8 data, buf;
219
220 pr_info("Dumping all stv06xx bridge registers\n");
221 for (i = 0x1400; i < 0x160f; i++) {
222 stv06xx_read_bridge(sd, i, &data);
223
224 pr_info("Read 0x%x from address 0x%x\n", data, i);
225 }
226
227 pr_info("Testing stv06xx bridge registers for writability\n");
228 for (i = 0x1400; i < 0x160f; i++) {
229 stv06xx_read_bridge(sd, i, &data);
230 buf = data;
231
232 stv06xx_write_bridge(sd, i, 0xff);
233 stv06xx_read_bridge(sd, i, &data);
234 if (data == 0xff)
235 pr_info("Register 0x%x is read/write\n", i);
236 else if (data != buf)
237 pr_info("Register 0x%x is read/write, but only partially\n",
238 i);
239 else
240 pr_info("Register 0x%x is read-only\n", i);
241
242 stv06xx_write_bridge(sd, i, buf);
243 }
244}
245
246
247static int stv06xx_init(struct gspca_dev *gspca_dev)
248{
249 struct sd *sd = (struct sd *) gspca_dev;
250 int err;
251
252 PDEBUG(D_PROBE, "Initializing camera");
253
254
255
256 msleep(250);
257
258 err = sd->sensor->init(sd);
259
260 if (dump_sensor && sd->sensor->dump)
261 sd->sensor->dump(sd);
262
263 return (err < 0) ? err : 0;
264}
265
266
267static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
268{
269 struct sd *sd = (struct sd *) gspca_dev;
270
271 PDEBUG(D_PROBE, "Initializing controls");
272
273 gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
274 return sd->sensor->init_controls(sd);
275}
276
277
278static int stv06xx_start(struct gspca_dev *gspca_dev)
279{
280 struct sd *sd = (struct sd *) gspca_dev;
281 struct usb_host_interface *alt;
282 struct usb_interface *intf;
283 int err, packet_size;
284
285 intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
286 alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
287 if (!alt) {
288 PERR("Couldn't get altsetting");
289 return -EIO;
290 }
291
292 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
293 err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
294 if (err < 0)
295 return err;
296
297
298 err = sd->sensor->start(sd);
299 if (err < 0)
300 goto out;
301
302
303 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
304
305out:
306 if (err < 0)
307 PDEBUG(D_STREAM, "Starting stream failed");
308 else
309 PDEBUG(D_STREAM, "Started streaming");
310
311 return (err < 0) ? err : 0;
312}
313
314static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
315{
316 struct usb_host_interface *alt;
317 struct sd *sd = (struct sd *) gspca_dev;
318
319
320 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
321 alt->endpoint[0].desc.wMaxPacketSize =
322 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
323
324 return 0;
325}
326
327static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
328{
329 int ret, packet_size, min_packet_size;
330 struct usb_host_interface *alt;
331 struct sd *sd = (struct sd *) gspca_dev;
332
333 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
334 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
335 min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
336 if (packet_size <= min_packet_size)
337 return -EIO;
338
339 packet_size -= 100;
340 if (packet_size < min_packet_size)
341 packet_size = min_packet_size;
342 alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
343
344 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
345 if (ret < 0)
346 PERR("set alt 1 err %d", ret);
347
348 return ret;
349}
350
351static void stv06xx_stopN(struct gspca_dev *gspca_dev)
352{
353 int err;
354 struct sd *sd = (struct sd *) gspca_dev;
355
356
357 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
358 if (err < 0)
359 goto out;
360
361 err = sd->sensor->stop(sd);
362
363out:
364 if (err < 0)
365 PDEBUG(D_STREAM, "Failed to stop stream");
366 else
367 PDEBUG(D_STREAM, "Stopped streaming");
368}
369
370
371
372
373
374
375
376
377
378
379
380
381
382static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
383 u8 *data,
384 int len)
385{
386 struct sd *sd = (struct sd *) gspca_dev;
387
388 PDEBUG(D_PACK, "Packet of length %d arrived", len);
389
390
391
392 while (len) {
393 int id, chunk_len;
394
395 if (len < 4) {
396 PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
397 return;
398 }
399
400
401 id = (data[0] << 8) | data[1];
402
403
404 chunk_len = (data[2] << 8) | data[3];
405 PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
406
407 data += 4;
408 len -= 4;
409
410 if (len < chunk_len) {
411 PERR("URB packet length is smaller than the specified chunk length");
412 gspca_dev->last_packet_type = DISCARD_PACKET;
413 return;
414 }
415
416
417 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
418 goto frame_data;
419
420 switch (id) {
421 case 0x0200:
422 case 0x4200:
423frame_data:
424 PDEBUG(D_PACK, "Frame data packet detected");
425
426 if (sd->to_skip) {
427 int skip = (sd->to_skip < chunk_len) ?
428 sd->to_skip : chunk_len;
429 data += skip;
430 len -= skip;
431 chunk_len -= skip;
432 sd->to_skip -= skip;
433 }
434
435 gspca_frame_add(gspca_dev, INTER_PACKET,
436 data, chunk_len);
437 break;
438
439 case 0x8001:
440 case 0x8005:
441 case 0xc001:
442 case 0xc005:
443 PDEBUG(D_PACK, "Starting new frame");
444
445
446 gspca_frame_add(gspca_dev, FIRST_PACKET,
447 NULL, 0);
448
449 if (sd->bridge == BRIDGE_ST6422)
450 sd->to_skip = gspca_dev->pixfmt.width * 4;
451
452 if (chunk_len)
453 PERR("Chunk length is non-zero on a SOF");
454 break;
455
456 case 0x8002:
457 case 0x8006:
458 case 0xc002:
459 PDEBUG(D_PACK, "End of frame detected");
460
461
462 gspca_frame_add(gspca_dev, LAST_PACKET,
463 NULL, 0);
464
465 if (chunk_len)
466 PERR("Chunk length is non-zero on a EOF");
467 break;
468
469 case 0x0005:
470 PDEBUG(D_PACK, "Chunk 0x005 detected");
471
472
473
474 break;
475
476 case 0x0100:
477 PDEBUG(D_PACK, "Chunk 0x0100 detected");
478
479
480 break;
481 case 0x42ff:
482 PDEBUG(D_PACK, "Chunk 0x42ff detected");
483
484 break;
485 default:
486 PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
487
488 }
489 data += chunk_len;
490 len -= chunk_len;
491 }
492}
493
494#if IS_ENABLED(CONFIG_INPUT)
495static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
496 u8 *data,
497 int len)
498{
499 int ret = -EINVAL;
500
501 if (len == 1 && (data[0] == 0x80 || data[0] == 0x10)) {
502 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
503 input_sync(gspca_dev->input_dev);
504 ret = 0;
505 }
506
507 if (len == 1 && (data[0] == 0x88 || data[0] == 0x11)) {
508 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
509 input_sync(gspca_dev->input_dev);
510 ret = 0;
511 }
512
513 return ret;
514}
515#endif
516
517static int stv06xx_config(struct gspca_dev *gspca_dev,
518 const struct usb_device_id *id);
519
520
521static const struct sd_desc sd_desc = {
522 .name = MODULE_NAME,
523 .config = stv06xx_config,
524 .init = stv06xx_init,
525 .init_controls = stv06xx_init_controls,
526 .start = stv06xx_start,
527 .stopN = stv06xx_stopN,
528 .pkt_scan = stv06xx_pkt_scan,
529 .isoc_init = stv06xx_isoc_init,
530 .isoc_nego = stv06xx_isoc_nego,
531#if IS_ENABLED(CONFIG_INPUT)
532 .int_pkt_scan = sd_int_pkt_scan,
533#endif
534};
535
536
537static int stv06xx_config(struct gspca_dev *gspca_dev,
538 const struct usb_device_id *id)
539{
540 struct sd *sd = (struct sd *) gspca_dev;
541
542 PDEBUG(D_PROBE, "Configuring camera");
543
544 sd->bridge = id->driver_info;
545 gspca_dev->sd_desc = &sd_desc;
546
547 if (dump_bridge)
548 stv06xx_dump_bridge(sd);
549
550 sd->sensor = &stv06xx_sensor_st6422;
551 if (!sd->sensor->probe(sd))
552 return 0;
553
554 sd->sensor = &stv06xx_sensor_vv6410;
555 if (!sd->sensor->probe(sd))
556 return 0;
557
558 sd->sensor = &stv06xx_sensor_hdcs1x00;
559 if (!sd->sensor->probe(sd))
560 return 0;
561
562 sd->sensor = &stv06xx_sensor_hdcs1020;
563 if (!sd->sensor->probe(sd))
564 return 0;
565
566 sd->sensor = &stv06xx_sensor_pb0100;
567 if (!sd->sensor->probe(sd))
568 return 0;
569
570 sd->sensor = NULL;
571 return -ENODEV;
572}
573
574
575
576
577static const struct usb_device_id device_table[] = {
578 {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
579 {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
580 {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
581 {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
582 {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
583 {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
584 {}
585};
586MODULE_DEVICE_TABLE(usb, device_table);
587
588
589static int sd_probe(struct usb_interface *intf,
590 const struct usb_device_id *id)
591{
592 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
593 THIS_MODULE);
594}
595
596static void sd_disconnect(struct usb_interface *intf)
597{
598 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
599 struct sd *sd = (struct sd *) gspca_dev;
600 void *priv = sd->sensor_priv;
601 PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
602
603 sd->sensor = NULL;
604 gspca_disconnect(intf);
605 kfree(priv);
606}
607
608static struct usb_driver sd_driver = {
609 .name = MODULE_NAME,
610 .id_table = device_table,
611 .probe = sd_probe,
612 .disconnect = sd_disconnect,
613#ifdef CONFIG_PM
614 .suspend = gspca_suspend,
615 .resume = gspca_resume,
616 .reset_resume = gspca_resume,
617#endif
618};
619
620module_usb_driver(sd_driver);
621
622module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
623MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
624
625module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
626MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");
627
