1/* 2 * Copyright (C) 2005-2006 Micronas USA Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License (Version 2) as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. 16 */ 17 18#include <linux/module.h> 19#include <linux/init.h> 20#include <linux/delay.h> 21#include <linux/sched.h> 22#include <linux/spinlock.h> 23#include <linux/unistd.h> 24#include <linux/time.h> 25#include <linux/mm.h> 26#include <linux/vmalloc.h> 27#include <linux/device.h> 28#include <linux/i2c.h> 29#include <linux/firmware.h> 30#include <linux/mutex.h> 31#include <linux/uaccess.h> 32#include <linux/slab.h> 33#include <asm/system.h> 34#include <linux/videodev2.h> 35#include <media/tuner.h> 36#include <media/v4l2-common.h> 37 38#include "go7007-priv.h" 39#include "wis-i2c.h" 40 41/* 42 * Wait for an interrupt to be delivered from the GO7007SB and return 43 * the associated value and data. 44 * 45 * Must be called with the hw_lock held. 46 */ 47int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data) 48{ 49 go->interrupt_available = 0; 50 go->hpi_ops->read_interrupt(go); 51 if (wait_event_timeout(go->interrupt_waitq, 52 go->interrupt_available, 5*HZ) < 0) { 53 v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n"); 54 return -1; 55 } 56 if (!go->interrupt_available) 57 return -1; 58 go->interrupt_available = 0; 59 *value = go->interrupt_value & 0xfffe; 60 *data = go->interrupt_data; 61 return 0; 62} 63EXPORT_SYMBOL(go7007_read_interrupt); 64 65/* 66 * Read a register/address on the GO7007SB. 67 * 68 * Must be called with the hw_lock held. 69 */ 70int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data) 71{ 72 int count = 100; 73 u16 value; 74 75 if (go7007_write_interrupt(go, 0x0010, addr) < 0) 76 return -EIO; 77 while (count-- > 0) { 78 if (go7007_read_interrupt(go, &value, data) == 0 && 79 value == 0xa000) 80 return 0; 81 } 82 return -EIO; 83} 84EXPORT_SYMBOL(go7007_read_addr); 85 86/* 87 * Send the boot firmware to the encoder, which just wakes it up and lets 88 * us talk to the GPIO pins and on-board I2C adapter. 89 * 90 * Must be called with the hw_lock held. 91 */ 92static int go7007_load_encoder(struct go7007 *go) 93{ 94 const struct firmware *fw_entry; 95 char fw_name[] = "go7007fw.bin"; 96 void *bounce; 97 int fw_len, rv = 0; 98 u16 intr_val, intr_data; 99 100 if (request_firmware(&fw_entry, fw_name, go->dev)) { 101 v4l2_err(go, "unable to load firmware from file " 102 "\"%s\"\n", fw_name); 103 return -1; 104 } 105 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) { 106 v4l2_err(go, "file \"%s\" does not appear to be " 107 "go7007 firmware\n", fw_name); 108 release_firmware(fw_entry); 109 return -1; 110 } 111 fw_len = fw_entry->size - 16; 112 bounce = kmalloc(fw_len, GFP_KERNEL); 113 if (bounce == NULL) { 114 v4l2_err(go, "unable to allocate %d bytes for " 115 "firmware transfer\n", fw_len); 116 release_firmware(fw_entry); 117 return -1; 118 } 119 memcpy(bounce, fw_entry->data + 16, fw_len); 120 release_firmware(fw_entry); 121 if (go7007_interface_reset(go) < 0 || 122 go7007_send_firmware(go, bounce, fw_len) < 0 || 123 go7007_read_interrupt(go, &intr_val, &intr_data) < 0 || 124 (intr_val & ~0x1) != 0x5a5a) { 125 v4l2_err(go, "error transferring firmware\n"); 126 rv = -1; 127 } 128 kfree(bounce); 129 return rv; 130} 131 132MODULE_FIRMWARE("go7007fw.bin"); 133 134/* 135 * Boot the encoder and register the I2C adapter if requested. Do the 136 * minimum initialization necessary, since the board-specific code may 137 * still need to probe the board ID. 138 * 139 * Must NOT be called with the hw_lock held. 140 */ 141int go7007_boot_encoder(struct go7007 *go, int init_i2c) 142{ 143 int ret; 144 145 mutex_lock(&go->hw_lock); 146 ret = go7007_load_encoder(go); 147 mutex_unlock(&go->hw_lock); 148 if (ret < 0) 149 return -1; 150 if (!init_i2c) 151 return 0; 152 if (go7007_i2c_init(go) < 0) 153 return -1; 154 go->i2c_adapter_online = 1; 155 return 0; 156} 157EXPORT_SYMBOL(go7007_boot_encoder); 158 159/* 160 * Configure any hardware-related registers in the GO7007, such as GPIO 161 * pins and bus parameters, which are board-specific. This assumes 162 * the boot firmware has already been downloaded. 163 * 164 * Must be called with the hw_lock held. 165 */ 166static int go7007_init_encoder(struct go7007 *go) 167{ 168 if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) { 169 go7007_write_addr(go, 0x1000, 0x0811); 170 go7007_write_addr(go, 0x1000, 0x0c11); 171 } 172 if (go->board_id == GO7007_BOARDID_MATRIX_REV) { 173 /* Set GPIO pin 0 to be an output (audio clock control) */ 174 go7007_write_addr(go, 0x3c82, 0x0001); 175 go7007_write_addr(go, 0x3c80, 0x00fe); 176 } 177 return 0; 178} 179 180/* 181 * Send the boot firmware to the GO7007 and configure the registers. This 182 * is the only way to stop the encoder once it has started streaming video. 183 * 184 * Must be called with the hw_lock held. 185 */ 186int go7007_reset_encoder(struct go7007 *go) 187{ 188 if (go7007_load_encoder(go) < 0) 189 return -1; 190 return go7007_init_encoder(go); 191} 192 193/* 194 * Attempt to instantiate an I2C client by ID, probably loading a module. 195 */ 196static int init_i2c_module(struct i2c_adapter *adapter, const char *type, 197 int id, int addr) 198{ 199 struct go7007 *go = i2c_get_adapdata(adapter); 200 struct v4l2_device *v4l2_dev = &go->v4l2_dev; 201 char *modname; 202 203 switch (id) { 204 case I2C_DRIVERID_WIS_SAA7115: 205 modname = "wis-saa7115"; 206 break; 207 case I2C_DRIVERID_WIS_SAA7113: 208 modname = "wis-saa7113"; 209 break; 210 case I2C_DRIVERID_WIS_UDA1342: 211 modname = "wis-uda1342"; 212 break; 213 case I2C_DRIVERID_WIS_SONY_TUNER: 214 modname = "wis-sony-tuner"; 215 break; 216 case I2C_DRIVERID_WIS_TW9903: 217 modname = "wis-tw9903"; 218 break; 219 case I2C_DRIVERID_WIS_TW2804: 220 modname = "wis-tw2804"; 221 break; 222 case I2C_DRIVERID_WIS_OV7640: 223 modname = "wis-ov7640"; 224 break; 225 case I2C_DRIVERID_S2250: 226 modname = "s2250"; 227 break; 228 default: 229 modname = NULL; 230 break; 231 } 232 233 if (v4l2_i2c_new_subdev(v4l2_dev, adapter, modname, type, addr, NULL)) 234 return 0; 235 236 if (modname != NULL) 237 printk(KERN_INFO 238 "go7007: probing for module %s failed\n", modname); 239 else 240 printk(KERN_INFO 241 "go7007: sensor %u seems to be unsupported!\n", id); 242 return -1; 243} 244 245/* 246 * Finalize the GO7007 hardware setup, register the on-board I2C adapter 247 * (if used on this board), load the I2C client driver for the sensor 248 * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2 249 * interfaces. 250 * 251 * Must NOT be called with the hw_lock held. 252 */ 253int go7007_register_encoder(struct go7007 *go) 254{ 255 int i, ret; 256 257 printk(KERN_INFO "go7007: registering new %s\n", go->name); 258 259 mutex_lock(&go->hw_lock); 260 ret = go7007_init_encoder(go); 261 mutex_unlock(&go->hw_lock); 262 if (ret < 0) 263 return -1; 264 265 /* v4l2 init must happen before i2c subdevs */ 266 ret = go7007_v4l2_init(go); 267 if (ret < 0) 268 return ret; 269 270 if (!go->i2c_adapter_online && 271 go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) { 272 if (go7007_i2c_init(go) < 0) 273 return -1; 274 go->i2c_adapter_online = 1; 275 } 276 if (go->i2c_adapter_online) { 277 for (i = 0; i < go->board_info->num_i2c_devs; ++i) 278 init_i2c_module(&go->i2c_adapter, 279 go->board_info->i2c_devs[i].type, 280 go->board_info->i2c_devs[i].id, 281 go->board_info->i2c_devs[i].addr); 282 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24) 283 i2c_clients_command(&go->i2c_adapter, 284 DECODER_SET_CHANNEL, &go->channel_number); 285 } 286 if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) { 287 go->audio_enabled = 1; 288 go7007_snd_init(go); 289 } 290 return 0; 291} 292EXPORT_SYMBOL(go7007_register_encoder); 293 294/* 295 * Send the encode firmware to the encoder, which will cause it 296 * to immediately start delivering the video and audio streams. 297 * 298 * Must be called with the hw_lock held. 299 */ 300int go7007_start_encoder(struct go7007 *go) 301{ 302 u8 *fw; 303 int fw_len, rv = 0, i; 304 u16 intr_val, intr_data; 305 306 go->modet_enable = 0; 307 if (!go->dvd_mode) 308 for (i = 0; i < 4; ++i) { 309 if (go->modet[i].enable) { 310 go->modet_enable = 1; 311 continue; 312 } 313 go->modet[i].pixel_threshold = 32767; 314 go->modet[i].motion_threshold = 32767; 315 go->modet[i].mb_threshold = 32767; 316 } 317 318 if (go7007_construct_fw_image(go, &fw, &fw_len) < 0) 319 return -1; 320 321 if (go7007_send_firmware(go, fw, fw_len) < 0 || 322 go7007_read_interrupt(go, &intr_val, &intr_data) < 0) { 323 v4l2_err(&go->v4l2_dev, "error transferring firmware\n"); 324 rv = -1; 325 goto start_error; 326 } 327 328 go->state = STATE_DATA; 329 go->parse_length = 0; 330 go->seen_frame = 0; 331 if (go7007_stream_start(go) < 0) { 332 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n"); 333 rv = -1; 334 goto start_error; 335 } 336 337start_error: 338 kfree(fw); 339 return rv; 340} 341 342/* 343 * Store a byte in the current video buffer, if there is one. 344 */ 345static inline void store_byte(struct go7007_buffer *gobuf, u8 byte) 346{ 347 if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) { 348 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT; 349 unsigned int pgoff = gobuf->offset & ~PAGE_MASK; 350 351 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte; 352 ++gobuf->offset; 353 ++gobuf->bytesused; 354 } 355} 356 357/* 358 * Deliver the last video buffer and get a new one to start writing to. 359 */ 360static void frame_boundary(struct go7007 *go) 361{ 362 struct go7007_buffer *gobuf; 363 int i; 364 365 if (go->active_buf) { 366 if (go->active_buf->modet_active) { 367 if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) { 368 for (i = 0; i < 216; ++i) 369 store_byte(go->active_buf, 370 go->active_map[i]); 371 go->active_buf->bytesused -= 216; 372 } else 373 go->active_buf->modet_active = 0; 374 } 375 go->active_buf->state = BUF_STATE_DONE; 376 wake_up_interruptible(&go->frame_waitq); 377 go->active_buf = NULL; 378 } 379 list_for_each_entry(gobuf, &go->stream, stream) 380 if (gobuf->state == BUF_STATE_QUEUED) { 381 gobuf->seq = go->next_seq; 382 do_gettimeofday(&gobuf->timestamp); 383 go->active_buf = gobuf; 384 break; 385 } 386 ++go->next_seq; 387} 388 389static void write_bitmap_word(struct go7007 *go) 390{ 391 int x, y, i, stride = ((go->width >> 4) + 7) >> 3; 392 393 for (i = 0; i < 16; ++i) { 394 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4); 395 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4); 396 go->active_map[stride * y + (x >> 3)] |= 397 (go->modet_word & 1) << (x & 0x7); 398 go->modet_word >>= 1; 399 } 400} 401 402/* 403 * Parse a chunk of the video stream into frames. The frames are not 404 * delimited by the hardware, so we have to parse the frame boundaries 405 * based on the type of video stream we're receiving. 406 */ 407void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length) 408{ 409 int i, seq_start_code = -1, frame_start_code = -1; 410 411 spin_lock(&go->spinlock); 412 413 switch (go->format) { 414 case GO7007_FORMAT_MPEG4: 415 seq_start_code = 0xB0; 416 frame_start_code = 0xB6; 417 break; 418 case GO7007_FORMAT_MPEG1: 419 case GO7007_FORMAT_MPEG2: 420 seq_start_code = 0xB3; 421 frame_start_code = 0x00; 422 break; 423 } 424 425 for (i = 0; i < length; ++i) { 426 if (go->active_buf != NULL && 427 go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) { 428 v4l2_info(&go->v4l2_dev, "dropping oversized frame\n"); 429 go->active_buf->offset -= go->active_buf->bytesused; 430 go->active_buf->bytesused = 0; 431 go->active_buf->modet_active = 0; 432 go->active_buf = NULL; 433 } 434 435 switch (go->state) { 436 case STATE_DATA: 437 switch (buf[i]) { 438 case 0x00: 439 go->state = STATE_00; 440 break; 441 case 0xFF: 442 go->state = STATE_FF; 443 break; 444 default: 445 store_byte(go->active_buf, buf[i]); 446 break; 447 } 448 break; 449 case STATE_00: 450 switch (buf[i]) { 451 case 0x00: 452 go->state = STATE_00_00; 453 break; 454 case 0xFF: 455 store_byte(go->active_buf, 0x00); 456 go->state = STATE_FF; 457 break; 458 default: 459 store_byte(go->active_buf, 0x00); 460 store_byte(go->active_buf, buf[i]); 461 go->state = STATE_DATA; 462 break; 463 } 464 break; 465 case STATE_00_00: 466 switch (buf[i]) { 467 case 0x00: 468 store_byte(go->active_buf, 0x00); 469 /* go->state remains STATE_00_00 */ 470 break; 471 case 0x01: 472 go->state = STATE_00_00_01; 473 break; 474 case 0xFF: 475 store_byte(go->active_buf, 0x00); 476 store_byte(go->active_buf, 0x00); 477 go->state = STATE_FF; 478 break; 479 default: 480 store_byte(go->active_buf, 0x00); 481 store_byte(go->active_buf, 0x00); 482 store_byte(go->active_buf, buf[i]); 483 go->state = STATE_DATA; 484 break; 485 } 486 break; 487 case STATE_00_00_01: 488 /* If this is the start of a new MPEG frame, 489 * get a new buffer */ 490 if ((go->format == GO7007_FORMAT_MPEG1 || 491 go->format == GO7007_FORMAT_MPEG2 || 492 go->format == GO7007_FORMAT_MPEG4) && 493 (buf[i] == seq_start_code || 494 buf[i] == 0xB8 || /* GOP code */ 495 buf[i] == frame_start_code)) { 496 if (go->active_buf == NULL || go->seen_frame) 497 frame_boundary(go); 498 if (buf[i] == frame_start_code) { 499 if (go->active_buf != NULL) 500 go->active_buf->frame_offset = 501 go->active_buf->offset; 502 go->seen_frame = 1; 503 } else { 504 go->seen_frame = 0; 505 } 506 } 507 /* Handle any special chunk types, or just write the 508 * start code to the (potentially new) buffer */ 509 switch (buf[i]) { 510 case 0xF5: /* timestamp */ 511 go->parse_length = 12; 512 go->state = STATE_UNPARSED; 513 break; 514 case 0xF6: /* vbi */ 515 go->state = STATE_VBI_LEN_A; 516 break; 517 case 0xF8: /* MD map */ 518 go->parse_length = 0; 519 memset(go->active_map, 0, 520 sizeof(go->active_map)); 521 go->state = STATE_MODET_MAP; 522 break; 523 case 0xFF: /* Potential JPEG start code */ 524 store_byte(go->active_buf, 0x00); 525 store_byte(go->active_buf, 0x00); 526 store_byte(go->active_buf, 0x01); 527 go->state = STATE_FF; 528 break; 529 default: 530 store_byte(go->active_buf, 0x00); 531 store_byte(go->active_buf, 0x00); 532 store_byte(go->active_buf, 0x01); 533 store_byte(go->active_buf, buf[i]); 534 go->state = STATE_DATA; 535 break; 536 } 537 break; 538 case STATE_FF: 539 switch (buf[i]) { 540 case 0x00: 541 store_byte(go->active_buf, 0xFF); 542 go->state = STATE_00; 543 break; 544 case 0xFF: 545 store_byte(go->active_buf, 0xFF); 546 /* go->state remains STATE_FF */ 547 break; 548 case 0xD8: 549 if (go->format == GO7007_FORMAT_MJPEG) 550 frame_boundary(go); 551 /* fall through */ 552 default: 553 store_byte(go->active_buf, 0xFF); 554 store_byte(go->active_buf, buf[i]); 555 go->state = STATE_DATA; 556 break; 557 } 558 break; 559 case STATE_VBI_LEN_A: 560 go->parse_length = buf[i] << 8; 561 go->state = STATE_VBI_LEN_B; 562 break; 563 case STATE_VBI_LEN_B: 564 go->parse_length |= buf[i]; 565 if (go->parse_length > 0) 566 go->state = STATE_UNPARSED; 567 else 568 go->state = STATE_DATA; 569 break; 570 case STATE_MODET_MAP: 571 if (go->parse_length < 204) { 572 if (go->parse_length & 1) { 573 go->modet_word |= buf[i]; 574 write_bitmap_word(go); 575 } else 576 go->modet_word = buf[i] << 8; 577 } else if (go->parse_length == 207 && go->active_buf) { 578 go->active_buf->modet_active = buf[i]; 579 } 580 if (++go->parse_length == 208) 581 go->state = STATE_DATA; 582 break; 583 case STATE_UNPARSED: 584 if (--go->parse_length == 0) 585 go->state = STATE_DATA; 586 break; 587 } 588 } 589 590 spin_unlock(&go->spinlock); 591} 592EXPORT_SYMBOL(go7007_parse_video_stream); 593 594/* 595 * Allocate a new go7007 struct. Used by the hardware-specific probe. 596 */ 597struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev) 598{ 599 struct go7007 *go; 600 int i; 601 602 go = kmalloc(sizeof(struct go7007), GFP_KERNEL); 603 if (go == NULL) 604 return NULL; 605 go->dev = dev; 606 go->board_info = board; 607 go->board_id = 0; 608 go->tuner_type = -1; 609 go->channel_number = 0; 610 go->name[0] = 0; 611 mutex_init(&go->hw_lock); 612 init_waitqueue_head(&go->frame_waitq); 613 spin_lock_init(&go->spinlock); 614 go->video_dev = NULL; 615 go->ref_count = 0; 616 go->status = STATUS_INIT; 617 memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter)); 618 go->i2c_adapter_online = 0; 619 go->interrupt_available = 0; 620 init_waitqueue_head(&go->interrupt_waitq); 621 go->in_use = 0; 622 go->input = 0; 623 if (board->sensor_flags & GO7007_SENSOR_TV) { 624 go->standard = GO7007_STD_NTSC; 625 go->width = 720; 626 go->height = 480; 627 go->sensor_framerate = 30000; 628 } else { 629 go->standard = GO7007_STD_OTHER; 630 go->width = board->sensor_width; 631 go->height = board->sensor_height; 632 go->sensor_framerate = board->sensor_framerate; 633 } 634 go->encoder_v_offset = board->sensor_v_offset; 635 go->encoder_h_offset = board->sensor_h_offset; 636 go->encoder_h_halve = 0; 637 go->encoder_v_halve = 0; 638 go->encoder_subsample = 0; 639 go->streaming = 0; 640 go->format = GO7007_FORMAT_MJPEG; 641 go->bitrate = 1500000; 642 go->fps_scale = 1; 643 go->pali = 0; 644 go->aspect_ratio = GO7007_RATIO_1_1; 645 go->gop_size = 0; 646 go->ipb = 0; 647 go->closed_gop = 0; 648 go->repeat_seqhead = 0; 649 go->seq_header_enable = 0; 650 go->gop_header_enable = 0; 651 go->dvd_mode = 0; 652 go->interlace_coding = 0; 653 for (i = 0; i < 4; ++i) 654 go->modet[i].enable = 0;; 655 for (i = 0; i < 1624; ++i) 656 go->modet_map[i] = 0; 657 go->audio_deliver = NULL; 658 go->audio_enabled = 0; 659 INIT_LIST_HEAD(&go->stream); 660 661 return go; 662} 663EXPORT_SYMBOL(go7007_alloc); 664 665/* 666 * Detach and unregister the encoder. The go7007 struct won't be freed 667 * until v4l2 finishes releasing its resources and all associated fds are 668 * closed by applications. 669 */ 670void go7007_remove(struct go7007 *go) 671{ 672 if (go->i2c_adapter_online) { 673 if (i2c_del_adapter(&go->i2c_adapter) == 0) 674 go->i2c_adapter_online = 0; 675 else 676 v4l2_err(&go->v4l2_dev, 677 "error removing I2C adapter!\n"); 678 } 679 680 if (go->audio_enabled) 681 go7007_snd_remove(go); 682 go7007_v4l2_remove(go); 683} 684EXPORT_SYMBOL(go7007_remove); 685 686MODULE_LICENSE("GPL v2"); 687