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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #include <linux/input.h> 33 #include "stv06xx_sensor.h" 34 35 MODULE_AUTHOR("Erik Andrén"); 36 MODULE_DESCRIPTION("STV06XX USB Camera Driver"); 37 MODULE_LICENSE("GPL"); 38 39 static bool dump_bridge; 40 static bool dump_sensor; 41 42 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data) 43 { 44 int err; 45 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 46 struct usb_device *udev = sd->gspca_dev.dev; 47 __u8 *buf = sd->gspca_dev.usb_buf; 48 49 u8 len = (i2c_data > 0xff) ? 2 : 1; 50 51 buf[0] = i2c_data & 0xff; 52 buf[1] = (i2c_data >> 8) & 0xff; 53 54 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 55 0x04, 0x40, address, 0, buf, len, 56 STV06XX_URB_MSG_TIMEOUT); 57 58 PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d", 59 i2c_data, address, err); 60 61 return (err < 0) ? err : 0; 62 } 63 64 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data) 65 { 66 int err; 67 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 68 struct usb_device *udev = sd->gspca_dev.dev; 69 __u8 *buf = sd->gspca_dev.usb_buf; 70 71 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 72 0x04, 0xc0, address, 0, buf, 1, 73 STV06XX_URB_MSG_TIMEOUT); 74 75 *i2c_data = buf[0]; 76 77 PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d", 78 *i2c_data, address, err); 79 80 return (err < 0) ? err : 0; 81 } 82 83 /* Wraps the normal write sensor bytes / words functions for writing a 84 single value */ 85 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value) 86 { 87 if (sd->sensor->i2c_len == 2) { 88 u16 data[2] = { address, value }; 89 return stv06xx_write_sensor_words(sd, data, 1); 90 } else { 91 u8 data[2] = { address, value }; 92 return stv06xx_write_sensor_bytes(sd, data, 1); 93 } 94 } 95 96 static int stv06xx_write_sensor_finish(struct sd *sd) 97 { 98 int err = 0; 99 100 if (sd->bridge == BRIDGE_STV610) { 101 struct usb_device *udev = sd->gspca_dev.dev; 102 __u8 *buf = sd->gspca_dev.usb_buf; 103 104 buf[0] = 0; 105 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 106 0x04, 0x40, 0x1704, 0, buf, 1, 107 STV06XX_URB_MSG_TIMEOUT); 108 } 109 110 return (err < 0) ? err : 0; 111 } 112 113 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len) 114 { 115 int err, i, j; 116 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 117 struct usb_device *udev = sd->gspca_dev.dev; 118 __u8 *buf = sd->gspca_dev.usb_buf; 119 120 PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len); 121 for (i = 0; i < len;) { 122 /* Build the command buffer */ 123 memset(buf, 0, I2C_BUFFER_LENGTH); 124 for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) { 125 buf[j] = data[2*i]; 126 buf[0x10 + j] = data[2*i+1]; 127 PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x", 128 data[2*i+1], data[2*i]); 129 } 130 buf[0x20] = sd->sensor->i2c_addr; 131 buf[0x21] = j - 1; /* Number of commands to send - 1 */ 132 buf[0x22] = I2C_WRITE_CMD; 133 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 134 0x04, 0x40, 0x0400, 0, buf, 135 I2C_BUFFER_LENGTH, 136 STV06XX_URB_MSG_TIMEOUT); 137 if (err < 0) 138 return err; 139 } 140 return stv06xx_write_sensor_finish(sd); 141 } 142 143 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len) 144 { 145 int err, i, j; 146 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 147 struct usb_device *udev = sd->gspca_dev.dev; 148 __u8 *buf = sd->gspca_dev.usb_buf; 149 150 PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len); 151 152 for (i = 0; i < len;) { 153 /* Build the command buffer */ 154 memset(buf, 0, I2C_BUFFER_LENGTH); 155 for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) { 156 buf[j] = data[2*i]; 157 buf[0x10 + j * 2] = data[2*i+1]; 158 buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8; 159 PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x", 160 data[2*i+1], data[2*i]); 161 } 162 buf[0x20] = sd->sensor->i2c_addr; 163 buf[0x21] = j - 1; /* Number of commands to send - 1 */ 164 buf[0x22] = I2C_WRITE_CMD; 165 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 166 0x04, 0x40, 0x0400, 0, buf, 167 I2C_BUFFER_LENGTH, 168 STV06XX_URB_MSG_TIMEOUT); 169 if (err < 0) 170 return err; 171 } 172 return stv06xx_write_sensor_finish(sd); 173 } 174 175 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value) 176 { 177 int err; 178 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd; 179 struct usb_device *udev = sd->gspca_dev.dev; 180 __u8 *buf = sd->gspca_dev.usb_buf; 181 182 err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush); 183 if (err < 0) 184 return err; 185 186 /* Clear mem */ 187 memset(buf, 0, I2C_BUFFER_LENGTH); 188 189 buf[0] = address; 190 buf[0x20] = sd->sensor->i2c_addr; 191 buf[0x21] = 0; 192 193 /* Read I2C register */ 194 buf[0x22] = I2C_READ_CMD; 195 196 err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 197 0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH, 198 STV06XX_URB_MSG_TIMEOUT); 199 if (err < 0) { 200 pr_err("I2C: Read error writing address: %d\n", err); 201 return err; 202 } 203 204 err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 205 0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len, 206 STV06XX_URB_MSG_TIMEOUT); 207 if (sd->sensor->i2c_len == 2) 208 *value = buf[0] | (buf[1] << 8); 209 else 210 *value = buf[0]; 211 212 PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d", 213 *value, address, err); 214 215 return (err < 0) ? err : 0; 216 } 217 218 /* Dumps all bridge registers */ 219 static void stv06xx_dump_bridge(struct sd *sd) 220 { 221 int i; 222 u8 data, buf; 223 224 pr_info("Dumping all stv06xx bridge registers\n"); 225 for (i = 0x1400; i < 0x160f; i++) { 226 stv06xx_read_bridge(sd, i, &data); 227 228 pr_info("Read 0x%x from address 0x%x\n", data, i); 229 } 230 231 pr_info("Testing stv06xx bridge registers for writability\n"); 232 for (i = 0x1400; i < 0x160f; i++) { 233 stv06xx_read_bridge(sd, i, &data); 234 buf = data; 235 236 stv06xx_write_bridge(sd, i, 0xff); 237 stv06xx_read_bridge(sd, i, &data); 238 if (data == 0xff) 239 pr_info("Register 0x%x is read/write\n", i); 240 else if (data != buf) 241 pr_info("Register 0x%x is read/write, but only partially\n", 242 i); 243 else 244 pr_info("Register 0x%x is read-only\n", i); 245 246 stv06xx_write_bridge(sd, i, buf); 247 } 248 } 249 250 /* this function is called at probe and resume time */ 251 static int stv06xx_init(struct gspca_dev *gspca_dev) 252 { 253 struct sd *sd = (struct sd *) gspca_dev; 254 int err; 255 256 PDEBUG(D_PROBE, "Initializing camera"); 257 258 /* Let the usb init settle for a bit 259 before performing the initialization */ 260 msleep(250); 261 262 err = sd->sensor->init(sd); 263 264 if (dump_sensor && sd->sensor->dump) 265 sd->sensor->dump(sd); 266 267 return (err < 0) ? err : 0; 268 } 269 270 /* this function is called at probe time */ 271 static int stv06xx_init_controls(struct gspca_dev *gspca_dev) 272 { 273 struct sd *sd = (struct sd *) gspca_dev; 274 275 PDEBUG(D_PROBE, "Initializing controls"); 276 277 gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler; 278 return sd->sensor->init_controls(sd); 279 } 280 281 /* Start the camera */ 282 static int stv06xx_start(struct gspca_dev *gspca_dev) 283 { 284 struct sd *sd = (struct sd *) gspca_dev; 285 struct usb_host_interface *alt; 286 struct usb_interface *intf; 287 int err, packet_size; 288 289 intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface); 290 alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt); 291 if (!alt) { 292 PERR("Couldn't get altsetting"); 293 return -EIO; 294 } 295 296 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); 297 err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size); 298 if (err < 0) 299 return err; 300 301 /* Prepare the sensor for start */ 302 err = sd->sensor->start(sd); 303 if (err < 0) 304 goto out; 305 306 /* Start isochronous streaming */ 307 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1); 308 309 out: 310 if (err < 0) 311 PDEBUG(D_STREAM, "Starting stream failed"); 312 else 313 PDEBUG(D_STREAM, "Started streaming"); 314 315 return (err < 0) ? err : 0; 316 } 317 318 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev) 319 { 320 struct usb_host_interface *alt; 321 struct sd *sd = (struct sd *) gspca_dev; 322 323 /* Start isoc bandwidth "negotiation" at max isoc bandwidth */ 324 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1]; 325 alt->endpoint[0].desc.wMaxPacketSize = 326 cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]); 327 328 return 0; 329 } 330 331 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev) 332 { 333 int ret, packet_size, min_packet_size; 334 struct usb_host_interface *alt; 335 struct sd *sd = (struct sd *) gspca_dev; 336 337 alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1]; 338 packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize); 339 min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode]; 340 if (packet_size <= min_packet_size) 341 return -EIO; 342 343 packet_size -= 100; 344 if (packet_size < min_packet_size) 345 packet_size = min_packet_size; 346 alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size); 347 348 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1); 349 if (ret < 0) 350 PERR("set alt 1 err %d", ret); 351 352 return ret; 353 } 354 355 static void stv06xx_stopN(struct gspca_dev *gspca_dev) 356 { 357 int err; 358 struct sd *sd = (struct sd *) gspca_dev; 359 360 /* stop ISO-streaming */ 361 err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0); 362 if (err < 0) 363 goto out; 364 365 err = sd->sensor->stop(sd); 366 367 out: 368 if (err < 0) 369 PDEBUG(D_STREAM, "Failed to stop stream"); 370 else 371 PDEBUG(D_STREAM, "Stopped streaming"); 372 } 373 374 /* 375 * Analyse an USB packet of the data stream and store it appropriately. 376 * Each packet contains an integral number of chunks. Each chunk has 377 * 2-bytes identification, followed by 2-bytes that describe the chunk 378 * length. Known/guessed chunk identifications are: 379 * 8001/8005/C001/C005 - Begin new frame 380 * 8002/8006/C002/C006 - End frame 381 * 0200/4200 - Contains actual image data, bayer or compressed 382 * 0005 - 11 bytes of unknown data 383 * 0100 - 2 bytes of unknown data 384 * The 0005 and 0100 chunks seem to appear only in compressed stream. 385 */ 386 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev, 387 u8 *data, /* isoc packet */ 388 int len) /* iso packet length */ 389 { 390 struct sd *sd = (struct sd *) gspca_dev; 391 392 PDEBUG(D_PACK, "Packet of length %d arrived", len); 393 394 /* A packet may contain several frames 395 loop until the whole packet is reached */ 396 while (len) { 397 int id, chunk_len; 398 399 if (len < 4) { 400 PDEBUG(D_PACK, "Packet is smaller than 4 bytes"); 401 return; 402 } 403 404 /* Capture the id */ 405 id = (data[0] << 8) | data[1]; 406 407 /* Capture the chunk length */ 408 chunk_len = (data[2] << 8) | data[3]; 409 PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len); 410 411 data += 4; 412 len -= 4; 413 414 if (len < chunk_len) { 415 PERR("URB packet length is smaller" 416 " than the specified chunk length"); 417 gspca_dev->last_packet_type = DISCARD_PACKET; 418 return; 419 } 420 421 /* First byte seem to be 02=data 2nd byte is unknown??? */ 422 if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200) 423 goto frame_data; 424 425 switch (id) { 426 case 0x0200: 427 case 0x4200: 428 frame_data: 429 PDEBUG(D_PACK, "Frame data packet detected"); 430 431 if (sd->to_skip) { 432 int skip = (sd->to_skip < chunk_len) ? 433 sd->to_skip : chunk_len; 434 data += skip; 435 len -= skip; 436 chunk_len -= skip; 437 sd->to_skip -= skip; 438 } 439 440 gspca_frame_add(gspca_dev, INTER_PACKET, 441 data, chunk_len); 442 break; 443 444 case 0x8001: 445 case 0x8005: 446 case 0xc001: 447 case 0xc005: 448 PDEBUG(D_PACK, "Starting new frame"); 449 450 /* Create a new frame, chunk length should be zero */ 451 gspca_frame_add(gspca_dev, FIRST_PACKET, 452 NULL, 0); 453 454 if (sd->bridge == BRIDGE_ST6422) 455 sd->to_skip = gspca_dev->pixfmt.width * 4; 456 457 if (chunk_len) 458 PERR("Chunk length is " 459 "non-zero on a SOF"); 460 break; 461 462 case 0x8002: 463 case 0x8006: 464 case 0xc002: 465 PDEBUG(D_PACK, "End of frame detected"); 466 467 /* Complete the last frame (if any) */ 468 gspca_frame_add(gspca_dev, LAST_PACKET, 469 NULL, 0); 470 471 if (chunk_len) 472 PERR("Chunk length is " 473 "non-zero on a EOF"); 474 break; 475 476 case 0x0005: 477 PDEBUG(D_PACK, "Chunk 0x005 detected"); 478 /* Unknown chunk with 11 bytes of data, 479 occurs just before end of each frame 480 in compressed mode */ 481 break; 482 483 case 0x0100: 484 PDEBUG(D_PACK, "Chunk 0x0100 detected"); 485 /* Unknown chunk with 2 bytes of data, 486 occurs 2-3 times per USB interrupt */ 487 break; 488 case 0x42ff: 489 PDEBUG(D_PACK, "Chunk 0x42ff detected"); 490 /* Special chunk seen sometimes on the ST6422 */ 491 break; 492 default: 493 PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id); 494 /* Unknown chunk */ 495 } 496 data += chunk_len; 497 len -= chunk_len; 498 } 499 } 500 501 #if IS_ENABLED(CONFIG_INPUT) 502 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, 503 u8 *data, /* interrupt packet data */ 504 int len) /* interrupt packet length */ 505 { 506 int ret = -EINVAL; 507 508 if (len == 1 && data[0] == 0x80) { 509 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1); 510 input_sync(gspca_dev->input_dev); 511 ret = 0; 512 } 513 514 if (len == 1 && data[0] == 0x88) { 515 input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0); 516 input_sync(gspca_dev->input_dev); 517 ret = 0; 518 } 519 520 return ret; 521 } 522 #endif 523 524 static int stv06xx_config(struct gspca_dev *gspca_dev, 525 const struct usb_device_id *id); 526 527 /* sub-driver description */ 528 static const struct sd_desc sd_desc = { 529 .name = MODULE_NAME, 530 .config = stv06xx_config, 531 .init = stv06xx_init, 532 .init_controls = stv06xx_init_controls, 533 .start = stv06xx_start, 534 .stopN = stv06xx_stopN, 535 .pkt_scan = stv06xx_pkt_scan, 536 .isoc_init = stv06xx_isoc_init, 537 .isoc_nego = stv06xx_isoc_nego, 538 #if IS_ENABLED(CONFIG_INPUT) 539 .int_pkt_scan = sd_int_pkt_scan, 540 #endif 541 }; 542 543 /* This function is called at probe time */ 544 static int stv06xx_config(struct gspca_dev *gspca_dev, 545 const struct usb_device_id *id) 546 { 547 struct sd *sd = (struct sd *) gspca_dev; 548 549 PDEBUG(D_PROBE, "Configuring camera"); 550 551 sd->bridge = id->driver_info; 552 gspca_dev->sd_desc = &sd_desc; 553 554 if (dump_bridge) 555 stv06xx_dump_bridge(sd); 556 557 sd->sensor = &stv06xx_sensor_st6422; 558 if (!sd->sensor->probe(sd)) 559 return 0; 560 561 sd->sensor = &stv06xx_sensor_vv6410; 562 if (!sd->sensor->probe(sd)) 563 return 0; 564 565 sd->sensor = &stv06xx_sensor_hdcs1x00; 566 if (!sd->sensor->probe(sd)) 567 return 0; 568 569 sd->sensor = &stv06xx_sensor_hdcs1020; 570 if (!sd->sensor->probe(sd)) 571 return 0; 572 573 sd->sensor = &stv06xx_sensor_pb0100; 574 if (!sd->sensor->probe(sd)) 575 return 0; 576 577 sd->sensor = NULL; 578 return -ENODEV; 579 } 580 581 582 583 /* -- module initialisation -- */ 584 static const struct usb_device_id device_table[] = { 585 /* QuickCam Express */ 586 {USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 }, 587 /* LEGO cam / QuickCam Web */ 588 {USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 }, 589 /* Dexxa WebCam USB */ 590 {USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 }, 591 /* QuickCam Messenger */ 592 {USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 }, 593 /* QuickCam Communicate */ 594 {USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 }, 595 /* QuickCam Messenger (new) */ 596 {USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 }, 597 {} 598 }; 599 MODULE_DEVICE_TABLE(usb, device_table); 600 601 /* -- device connect -- */ 602 static int sd_probe(struct usb_interface *intf, 603 const struct usb_device_id *id) 604 { 605 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 606 THIS_MODULE); 607 } 608 609 static void sd_disconnect(struct usb_interface *intf) 610 { 611 struct gspca_dev *gspca_dev = usb_get_intfdata(intf); 612 struct sd *sd = (struct sd *) gspca_dev; 613 void *priv = sd->sensor_priv; 614 PDEBUG(D_PROBE, "Disconnecting the stv06xx device"); 615 616 sd->sensor = NULL; 617 gspca_disconnect(intf); 618 kfree(priv); 619 } 620 621 static struct usb_driver sd_driver = { 622 .name = MODULE_NAME, 623 .id_table = device_table, 624 .probe = sd_probe, 625 .disconnect = sd_disconnect, 626 #ifdef CONFIG_PM 627 .suspend = gspca_suspend, 628 .resume = gspca_resume, 629 .reset_resume = gspca_resume, 630 #endif 631 }; 632 633 module_usb_driver(sd_driver); 634 635 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR); 636 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup"); 637 638 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR); 639 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup"); 640