1 /* 2 * et8ek8_driver.c 3 * 4 * Copyright (C) 2008 Nokia Corporation 5 * 6 * Contact: Sakari Ailus <sakari.ailus@iki.fi> 7 * Tuukka Toivonen <tuukkat76@gmail.com> 8 * Pavel Machek <pavel@ucw.cz> 9 * 10 * Based on code from Toni Leinonen <toni.leinonen@offcode.fi>. 11 * 12 * This driver is based on the Micron MT9T012 camera imager driver 13 * (C) Texas Instruments. 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * version 2 as published by the Free Software Foundation. 18 * 19 * This program is distributed in the hope that it will be useful, but 20 * WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 * General Public License for more details. 23 */ 24 25 #include <linux/clk.h> 26 #include <linux/delay.h> 27 #include <linux/gpio/consumer.h> 28 #include <linux/i2c.h> 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/mutex.h> 32 #include <linux/regulator/consumer.h> 33 #include <linux/slab.h> 34 #include <linux/sort.h> 35 #include <linux/v4l2-mediabus.h> 36 37 #include <media/media-entity.h> 38 #include <media/v4l2-ctrls.h> 39 #include <media/v4l2-device.h> 40 #include <media/v4l2-subdev.h> 41 42 #include "et8ek8_reg.h" 43 44 #define ET8EK8_NAME "et8ek8" 45 #define ET8EK8_PRIV_MEM_SIZE 128 46 #define ET8EK8_MAX_MSG 48 47 48 struct et8ek8_sensor { 49 struct v4l2_subdev subdev; 50 struct media_pad pad; 51 struct v4l2_mbus_framefmt format; 52 struct gpio_desc *reset; 53 struct regulator *vana; 54 struct clk *ext_clk; 55 u32 xclk_freq; 56 57 u16 version; 58 59 struct v4l2_ctrl_handler ctrl_handler; 60 struct v4l2_ctrl *exposure; 61 struct v4l2_ctrl *pixel_rate; 62 struct et8ek8_reglist *current_reglist; 63 64 u8 priv_mem[ET8EK8_PRIV_MEM_SIZE]; 65 66 struct mutex power_lock; 67 int power_count; 68 }; 69 70 #define to_et8ek8_sensor(sd) container_of(sd, struct et8ek8_sensor, subdev) 71 72 enum et8ek8_versions { 73 ET8EK8_REV_1 = 0x0001, 74 ET8EK8_REV_2, 75 }; 76 77 /* 78 * This table describes what should be written to the sensor register 79 * for each gain value. The gain(index in the table) is in terms of 80 * 0.1EV, i.e. 10 indexes in the table give 2 time more gain [0] in 81 * the *analog gain, [1] in the digital gain 82 * 83 * Analog gain [dB] = 20*log10(regvalue/32); 0x20..0x100 84 */ 85 static struct et8ek8_gain { 86 u16 analog; 87 u16 digital; 88 } const et8ek8_gain_table[] = { 89 { 32, 0}, /* x1 */ 90 { 34, 0}, 91 { 37, 0}, 92 { 39, 0}, 93 { 42, 0}, 94 { 45, 0}, 95 { 49, 0}, 96 { 52, 0}, 97 { 56, 0}, 98 { 60, 0}, 99 { 64, 0}, /* x2 */ 100 { 69, 0}, 101 { 74, 0}, 102 { 79, 0}, 103 { 84, 0}, 104 { 91, 0}, 105 { 97, 0}, 106 {104, 0}, 107 {111, 0}, 108 {119, 0}, 109 {128, 0}, /* x4 */ 110 {137, 0}, 111 {147, 0}, 112 {158, 0}, 113 {169, 0}, 114 {181, 0}, 115 {194, 0}, 116 {208, 0}, 117 {223, 0}, 118 {239, 0}, 119 {256, 0}, /* x8 */ 120 {256, 73}, 121 {256, 152}, 122 {256, 236}, 123 {256, 327}, 124 {256, 424}, 125 {256, 528}, 126 {256, 639}, 127 {256, 758}, 128 {256, 886}, 129 {256, 1023}, /* x16 */ 130 }; 131 132 /* Register definitions */ 133 #define REG_REVISION_NUMBER_L 0x1200 134 #define REG_REVISION_NUMBER_H 0x1201 135 136 #define PRIV_MEM_START_REG 0x0008 137 #define PRIV_MEM_WIN_SIZE 8 138 139 #define ET8EK8_I2C_DELAY 3 /* msec delay b/w accesses */ 140 141 #define USE_CRC 1 142 143 /* 144 * Register access helpers 145 * 146 * Read a 8/16/32-bit i2c register. The value is returned in 'val'. 147 * Returns zero if successful, or non-zero otherwise. 148 */ 149 static int et8ek8_i2c_read_reg(struct i2c_client *client, u16 data_length, 150 u16 reg, u32 *val) 151 { 152 int r; 153 struct i2c_msg msg; 154 unsigned char data[4]; 155 156 if (!client->adapter) 157 return -ENODEV; 158 if (data_length != ET8EK8_REG_8BIT && data_length != ET8EK8_REG_16BIT) 159 return -EINVAL; 160 161 msg.addr = client->addr; 162 msg.flags = 0; 163 msg.len = 2; 164 msg.buf = data; 165 166 /* high byte goes out first */ 167 data[0] = (u8) (reg >> 8); 168 data[1] = (u8) (reg & 0xff); 169 r = i2c_transfer(client->adapter, &msg, 1); 170 if (r < 0) 171 goto err; 172 173 msg.len = data_length; 174 msg.flags = I2C_M_RD; 175 r = i2c_transfer(client->adapter, &msg, 1); 176 if (r < 0) 177 goto err; 178 179 *val = 0; 180 /* high byte comes first */ 181 if (data_length == ET8EK8_REG_8BIT) 182 *val = data[0]; 183 else 184 *val = (data[1] << 8) + data[0]; 185 186 return 0; 187 188 err: 189 dev_err(&client->dev, "read from offset 0x%x error %d\n", reg, r); 190 191 return r; 192 } 193 194 static void et8ek8_i2c_create_msg(struct i2c_client *client, u16 len, u16 reg, 195 u32 val, struct i2c_msg *msg, 196 unsigned char *buf) 197 { 198 msg->addr = client->addr; 199 msg->flags = 0; /* Write */ 200 msg->len = 2 + len; 201 msg->buf = buf; 202 203 /* high byte goes out first */ 204 buf[0] = (u8) (reg >> 8); 205 buf[1] = (u8) (reg & 0xff); 206 207 switch (len) { 208 case ET8EK8_REG_8BIT: 209 buf[2] = (u8) (val) & 0xff; 210 break; 211 case ET8EK8_REG_16BIT: 212 buf[2] = (u8) (val) & 0xff; 213 buf[3] = (u8) (val >> 8) & 0xff; 214 break; 215 default: 216 WARN_ONCE(1, ET8EK8_NAME ": %s: invalid message length.\n", 217 __func__); 218 } 219 } 220 221 /* 222 * A buffered write method that puts the wanted register write 223 * commands in a message list and passes the list to the i2c framework 224 */ 225 static int et8ek8_i2c_buffered_write_regs(struct i2c_client *client, 226 const struct et8ek8_reg *wnext, 227 int cnt) 228 { 229 struct i2c_msg msg[ET8EK8_MAX_MSG]; 230 unsigned char data[ET8EK8_MAX_MSG][6]; 231 int wcnt = 0; 232 u16 reg, data_length; 233 u32 val; 234 235 if (WARN_ONCE(cnt > ET8EK8_MAX_MSG, 236 ET8EK8_NAME ": %s: too many messages.\n", __func__)) { 237 return -EINVAL; 238 } 239 240 /* Create new write messages for all writes */ 241 while (wcnt < cnt) { 242 data_length = wnext->type; 243 reg = wnext->reg; 244 val = wnext->val; 245 wnext++; 246 247 et8ek8_i2c_create_msg(client, data_length, reg, 248 val, &msg[wcnt], &data[wcnt][0]); 249 250 /* Update write count */ 251 wcnt++; 252 } 253 254 /* Now we send everything ... */ 255 return i2c_transfer(client->adapter, msg, wcnt); 256 } 257 258 /* 259 * Write a list of registers to i2c device. 260 * 261 * The list of registers is terminated by ET8EK8_REG_TERM. 262 * Returns zero if successful, or non-zero otherwise. 263 */ 264 static int et8ek8_i2c_write_regs(struct i2c_client *client, 265 const struct et8ek8_reg *regs) 266 { 267 int r, cnt = 0; 268 const struct et8ek8_reg *next; 269 270 if (!client->adapter) 271 return -ENODEV; 272 273 if (!regs) 274 return -EINVAL; 275 276 /* Initialize list pointers to the start of the list */ 277 next = regs; 278 279 do { 280 /* 281 * We have to go through the list to figure out how 282 * many regular writes we have in a row 283 */ 284 while (next->type != ET8EK8_REG_TERM && 285 next->type != ET8EK8_REG_DELAY) { 286 /* 287 * Here we check that the actual length fields 288 * are valid 289 */ 290 if (WARN(next->type != ET8EK8_REG_8BIT && 291 next->type != ET8EK8_REG_16BIT, 292 "Invalid type = %d", next->type)) { 293 return -EINVAL; 294 } 295 /* 296 * Increment count of successive writes and 297 * read pointer 298 */ 299 cnt++; 300 next++; 301 } 302 303 /* Now we start writing ... */ 304 r = et8ek8_i2c_buffered_write_regs(client, regs, cnt); 305 306 /* ... and then check that everything was OK */ 307 if (r < 0) { 308 dev_err(&client->dev, "i2c transfer error!\n"); 309 return r; 310 } 311 312 /* 313 * If we ran into a sleep statement when going through 314 * the list, this is where we snooze for the required time 315 */ 316 if (next->type == ET8EK8_REG_DELAY) { 317 msleep(next->val); 318 /* 319 * ZZZ ... 320 * Update list pointers and cnt and start over ... 321 */ 322 next++; 323 regs = next; 324 cnt = 0; 325 } 326 } while (next->type != ET8EK8_REG_TERM); 327 328 return 0; 329 } 330 331 /* 332 * Write to a 8/16-bit register. 333 * Returns zero if successful, or non-zero otherwise. 334 */ 335 static int et8ek8_i2c_write_reg(struct i2c_client *client, u16 data_length, 336 u16 reg, u32 val) 337 { 338 int r; 339 struct i2c_msg msg; 340 unsigned char data[6]; 341 342 if (!client->adapter) 343 return -ENODEV; 344 if (data_length != ET8EK8_REG_8BIT && data_length != ET8EK8_REG_16BIT) 345 return -EINVAL; 346 347 et8ek8_i2c_create_msg(client, data_length, reg, val, &msg, data); 348 349 r = i2c_transfer(client->adapter, &msg, 1); 350 if (r < 0) { 351 dev_err(&client->dev, 352 "wrote 0x%x to offset 0x%x error %d\n", val, reg, r); 353 return r; 354 } 355 356 return 0; 357 } 358 359 static struct et8ek8_reglist *et8ek8_reglist_find_type( 360 struct et8ek8_meta_reglist *meta, 361 u16 type) 362 { 363 struct et8ek8_reglist **next = &meta->reglist[0].ptr; 364 365 while (*next) { 366 if ((*next)->type == type) 367 return *next; 368 369 next++; 370 } 371 372 return NULL; 373 } 374 375 static int et8ek8_i2c_reglist_find_write(struct i2c_client *client, 376 struct et8ek8_meta_reglist *meta, 377 u16 type) 378 { 379 struct et8ek8_reglist *reglist; 380 381 reglist = et8ek8_reglist_find_type(meta, type); 382 if (!reglist) 383 return -EINVAL; 384 385 return et8ek8_i2c_write_regs(client, reglist->regs); 386 } 387 388 static struct et8ek8_reglist **et8ek8_reglist_first( 389 struct et8ek8_meta_reglist *meta) 390 { 391 return &meta->reglist[0].ptr; 392 } 393 394 static void et8ek8_reglist_to_mbus(const struct et8ek8_reglist *reglist, 395 struct v4l2_mbus_framefmt *fmt) 396 { 397 fmt->width = reglist->mode.window_width; 398 fmt->height = reglist->mode.window_height; 399 fmt->code = reglist->mode.bus_format; 400 } 401 402 static struct et8ek8_reglist *et8ek8_reglist_find_mode_fmt( 403 struct et8ek8_meta_reglist *meta, 404 struct v4l2_mbus_framefmt *fmt) 405 { 406 struct et8ek8_reglist **list = et8ek8_reglist_first(meta); 407 struct et8ek8_reglist *best_match = NULL; 408 struct et8ek8_reglist *best_other = NULL; 409 struct v4l2_mbus_framefmt format; 410 unsigned int max_dist_match = (unsigned int)-1; 411 unsigned int max_dist_other = (unsigned int)-1; 412 413 /* 414 * Find the mode with the closest image size. The distance between 415 * image sizes is the size in pixels of the non-overlapping regions 416 * between the requested size and the frame-specified size. 417 * 418 * Store both the closest mode that matches the requested format, and 419 * the closest mode for all other formats. The best match is returned 420 * if found, otherwise the best mode with a non-matching format is 421 * returned. 422 */ 423 for (; *list; list++) { 424 unsigned int dist; 425 426 if ((*list)->type != ET8EK8_REGLIST_MODE) 427 continue; 428 429 et8ek8_reglist_to_mbus(*list, &format); 430 431 dist = min(fmt->width, format.width) 432 * min(fmt->height, format.height); 433 dist = format.width * format.height 434 + fmt->width * fmt->height - 2 * dist; 435 436 437 if (fmt->code == format.code) { 438 if (dist < max_dist_match || !best_match) { 439 best_match = *list; 440 max_dist_match = dist; 441 } 442 } else { 443 if (dist < max_dist_other || !best_other) { 444 best_other = *list; 445 max_dist_other = dist; 446 } 447 } 448 } 449 450 return best_match ? best_match : best_other; 451 } 452 453 #define TIMEPERFRAME_AVG_FPS(t) \ 454 (((t).denominator + ((t).numerator >> 1)) / (t).numerator) 455 456 static struct et8ek8_reglist *et8ek8_reglist_find_mode_ival( 457 struct et8ek8_meta_reglist *meta, 458 struct et8ek8_reglist *current_reglist, 459 struct v4l2_fract *timeperframe) 460 { 461 int fps = TIMEPERFRAME_AVG_FPS(*timeperframe); 462 struct et8ek8_reglist **list = et8ek8_reglist_first(meta); 463 struct et8ek8_mode *current_mode = ¤t_reglist->mode; 464 465 for (; *list; list++) { 466 struct et8ek8_mode *mode = &(*list)->mode; 467 468 if ((*list)->type != ET8EK8_REGLIST_MODE) 469 continue; 470 471 if (mode->window_width != current_mode->window_width || 472 mode->window_height != current_mode->window_height) 473 continue; 474 475 if (TIMEPERFRAME_AVG_FPS(mode->timeperframe) == fps) 476 return *list; 477 } 478 479 return NULL; 480 } 481 482 static int et8ek8_reglist_cmp(const void *a, const void *b) 483 { 484 const struct et8ek8_reglist **list1 = (const struct et8ek8_reglist **)a, 485 **list2 = (const struct et8ek8_reglist **)b; 486 487 /* Put real modes in the beginning. */ 488 if ((*list1)->type == ET8EK8_REGLIST_MODE && 489 (*list2)->type != ET8EK8_REGLIST_MODE) 490 return -1; 491 if ((*list1)->type != ET8EK8_REGLIST_MODE && 492 (*list2)->type == ET8EK8_REGLIST_MODE) 493 return 1; 494 495 /* Descending width. */ 496 if ((*list1)->mode.window_width > (*list2)->mode.window_width) 497 return -1; 498 if ((*list1)->mode.window_width < (*list2)->mode.window_width) 499 return 1; 500 501 if ((*list1)->mode.window_height > (*list2)->mode.window_height) 502 return -1; 503 if ((*list1)->mode.window_height < (*list2)->mode.window_height) 504 return 1; 505 506 return 0; 507 } 508 509 static int et8ek8_reglist_import(struct i2c_client *client, 510 struct et8ek8_meta_reglist *meta) 511 { 512 int nlists = 0, i; 513 514 dev_info(&client->dev, "meta_reglist version %s\n", meta->version); 515 516 while (meta->reglist[nlists].ptr) 517 nlists++; 518 519 if (!nlists) 520 return -EINVAL; 521 522 sort(&meta->reglist[0].ptr, nlists, sizeof(meta->reglist[0].ptr), 523 et8ek8_reglist_cmp, NULL); 524 525 i = nlists; 526 nlists = 0; 527 528 while (i--) { 529 struct et8ek8_reglist *list; 530 531 list = meta->reglist[nlists].ptr; 532 533 dev_dbg(&client->dev, 534 "%s: type %d\tw %d\th %d\tfmt %x\tival %d/%d\tptr %p\n", 535 __func__, 536 list->type, 537 list->mode.window_width, list->mode.window_height, 538 list->mode.bus_format, 539 list->mode.timeperframe.numerator, 540 list->mode.timeperframe.denominator, 541 (void *)meta->reglist[nlists].ptr); 542 543 nlists++; 544 } 545 546 return 0; 547 } 548 549 /* Called to change the V4L2 gain control value. This function 550 * rounds and clamps the given value and updates the V4L2 control value. 551 * If power is on, also updates the sensor analog and digital gains. 552 * gain is in 0.1 EV (exposure value) units. 553 */ 554 static int et8ek8_set_gain(struct et8ek8_sensor *sensor, s32 gain) 555 { 556 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); 557 struct et8ek8_gain new; 558 int r; 559 560 new = et8ek8_gain_table[gain]; 561 562 /* FIXME: optimise I2C writes! */ 563 r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 564 0x124a, new.analog >> 8); 565 if (r) 566 return r; 567 r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 568 0x1249, new.analog & 0xff); 569 if (r) 570 return r; 571 572 r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 573 0x124d, new.digital >> 8); 574 if (r) 575 return r; 576 r = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 577 0x124c, new.digital & 0xff); 578 579 return r; 580 } 581 582 static int et8ek8_set_test_pattern(struct et8ek8_sensor *sensor, s32 mode) 583 { 584 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); 585 int cbh_mode, cbv_mode, tp_mode, din_sw, r1420, rval; 586 587 /* Values for normal mode */ 588 cbh_mode = 0; 589 cbv_mode = 0; 590 tp_mode = 0; 591 din_sw = 0x00; 592 r1420 = 0xF0; 593 594 if (mode) { 595 /* Test pattern mode */ 596 if (mode < 5) { 597 cbh_mode = 1; 598 cbv_mode = 1; 599 tp_mode = mode + 3; 600 } else { 601 cbh_mode = 0; 602 cbv_mode = 0; 603 tp_mode = mode - 4 + 3; 604 } 605 606 din_sw = 0x01; 607 r1420 = 0xE0; 608 } 609 610 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x111B, 611 tp_mode << 4); 612 if (rval) 613 return rval; 614 615 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1121, 616 cbh_mode << 7); 617 if (rval) 618 return rval; 619 620 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1124, 621 cbv_mode << 7); 622 if (rval) 623 return rval; 624 625 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x112C, din_sw); 626 if (rval) 627 return rval; 628 629 return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1420, r1420); 630 } 631 632 /* ----------------------------------------------------------------------------- 633 * V4L2 controls 634 */ 635 636 static int et8ek8_set_ctrl(struct v4l2_ctrl *ctrl) 637 { 638 struct et8ek8_sensor *sensor = 639 container_of(ctrl->handler, struct et8ek8_sensor, ctrl_handler); 640 641 switch (ctrl->id) { 642 case V4L2_CID_GAIN: 643 return et8ek8_set_gain(sensor, ctrl->val); 644 645 case V4L2_CID_EXPOSURE: 646 { 647 struct i2c_client *client = 648 v4l2_get_subdevdata(&sensor->subdev); 649 650 return et8ek8_i2c_write_reg(client, ET8EK8_REG_16BIT, 0x1243, 651 ctrl->val); 652 } 653 654 case V4L2_CID_TEST_PATTERN: 655 return et8ek8_set_test_pattern(sensor, ctrl->val); 656 657 case V4L2_CID_PIXEL_RATE: 658 return 0; 659 660 default: 661 return -EINVAL; 662 } 663 } 664 665 static const struct v4l2_ctrl_ops et8ek8_ctrl_ops = { 666 .s_ctrl = et8ek8_set_ctrl, 667 }; 668 669 static const char * const et8ek8_test_pattern_menu[] = { 670 "Normal", 671 "Vertical colorbar", 672 "Horizontal colorbar", 673 "Scale", 674 "Ramp", 675 "Small vertical colorbar", 676 "Small horizontal colorbar", 677 "Small scale", 678 "Small ramp", 679 }; 680 681 static int et8ek8_init_controls(struct et8ek8_sensor *sensor) 682 { 683 s32 max_rows; 684 685 v4l2_ctrl_handler_init(&sensor->ctrl_handler, 4); 686 687 /* V4L2_CID_GAIN */ 688 v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops, 689 V4L2_CID_GAIN, 0, ARRAY_SIZE(et8ek8_gain_table) - 1, 690 1, 0); 691 692 max_rows = sensor->current_reglist->mode.max_exp; 693 { 694 u32 min = 1, max = max_rows; 695 696 sensor->exposure = 697 v4l2_ctrl_new_std(&sensor->ctrl_handler, 698 &et8ek8_ctrl_ops, V4L2_CID_EXPOSURE, 699 min, max, min, max); 700 } 701 702 /* V4L2_CID_PIXEL_RATE */ 703 sensor->pixel_rate = 704 v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops, 705 V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1); 706 707 /* V4L2_CID_TEST_PATTERN */ 708 v4l2_ctrl_new_std_menu_items(&sensor->ctrl_handler, 709 &et8ek8_ctrl_ops, V4L2_CID_TEST_PATTERN, 710 ARRAY_SIZE(et8ek8_test_pattern_menu) - 1, 711 0, 0, et8ek8_test_pattern_menu); 712 713 if (sensor->ctrl_handler.error) 714 return sensor->ctrl_handler.error; 715 716 sensor->subdev.ctrl_handler = &sensor->ctrl_handler; 717 718 return 0; 719 } 720 721 static void et8ek8_update_controls(struct et8ek8_sensor *sensor) 722 { 723 struct v4l2_ctrl *ctrl; 724 struct et8ek8_mode *mode = &sensor->current_reglist->mode; 725 726 u32 min, max, pixel_rate; 727 static const int S = 8; 728 729 ctrl = sensor->exposure; 730 731 min = 1; 732 max = mode->max_exp; 733 734 /* 735 * Calculate average pixel clock per line. Assume buffers can spread 736 * the data over horizontal blanking time. Rounding upwards. 737 * Formula taken from stock Nokia N900 kernel. 738 */ 739 pixel_rate = ((mode->pixel_clock + (1 << S) - 1) >> S) + mode->width; 740 pixel_rate = mode->window_width * (pixel_rate - 1) / mode->width; 741 742 __v4l2_ctrl_modify_range(ctrl, min, max, min, max); 743 __v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate, pixel_rate << S); 744 } 745 746 static int et8ek8_configure(struct et8ek8_sensor *sensor) 747 { 748 struct v4l2_subdev *subdev = &sensor->subdev; 749 struct i2c_client *client = v4l2_get_subdevdata(subdev); 750 int rval; 751 752 rval = et8ek8_i2c_write_regs(client, sensor->current_reglist->regs); 753 if (rval) 754 goto fail; 755 756 /* Controls set while the power to the sensor is turned off are saved 757 * but not applied to the hardware. Now that we're about to start 758 * streaming apply all the current values to the hardware. 759 */ 760 rval = v4l2_ctrl_handler_setup(&sensor->ctrl_handler); 761 if (rval) 762 goto fail; 763 764 return 0; 765 766 fail: 767 dev_err(&client->dev, "sensor configuration failed\n"); 768 769 return rval; 770 } 771 772 static int et8ek8_stream_on(struct et8ek8_sensor *sensor) 773 { 774 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); 775 776 return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1252, 0xb0); 777 } 778 779 static int et8ek8_stream_off(struct et8ek8_sensor *sensor) 780 { 781 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev); 782 783 return et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1252, 0x30); 784 } 785 786 static int et8ek8_s_stream(struct v4l2_subdev *subdev, int streaming) 787 { 788 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 789 int ret; 790 791 if (!streaming) 792 return et8ek8_stream_off(sensor); 793 794 ret = et8ek8_configure(sensor); 795 if (ret < 0) 796 return ret; 797 798 return et8ek8_stream_on(sensor); 799 } 800 801 /* -------------------------------------------------------------------------- 802 * V4L2 subdev operations 803 */ 804 805 static int et8ek8_power_off(struct et8ek8_sensor *sensor) 806 { 807 gpiod_set_value(sensor->reset, 0); 808 udelay(1); 809 810 clk_disable_unprepare(sensor->ext_clk); 811 812 return regulator_disable(sensor->vana); 813 } 814 815 static int et8ek8_power_on(struct et8ek8_sensor *sensor) 816 { 817 struct v4l2_subdev *subdev = &sensor->subdev; 818 struct i2c_client *client = v4l2_get_subdevdata(subdev); 819 unsigned int xclk_freq; 820 int val, rval; 821 822 rval = regulator_enable(sensor->vana); 823 if (rval) { 824 dev_err(&client->dev, "failed to enable vana regulator\n"); 825 return rval; 826 } 827 828 if (sensor->current_reglist) 829 xclk_freq = sensor->current_reglist->mode.ext_clock; 830 else 831 xclk_freq = sensor->xclk_freq; 832 833 rval = clk_set_rate(sensor->ext_clk, xclk_freq); 834 if (rval < 0) { 835 dev_err(&client->dev, "unable to set extclk clock freq to %u\n", 836 xclk_freq); 837 goto out; 838 } 839 rval = clk_prepare_enable(sensor->ext_clk); 840 if (rval < 0) { 841 dev_err(&client->dev, "failed to enable extclk\n"); 842 goto out; 843 } 844 845 if (rval) 846 goto out; 847 848 udelay(10); /* I wish this is a good value */ 849 850 gpiod_set_value(sensor->reset, 1); 851 852 msleep(5000 * 1000 / xclk_freq + 1); /* Wait 5000 cycles */ 853 854 rval = et8ek8_i2c_reglist_find_write(client, &meta_reglist, 855 ET8EK8_REGLIST_POWERON); 856 if (rval) 857 goto out; 858 859 #ifdef USE_CRC 860 rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, 0x1263, &val); 861 if (rval) 862 goto out; 863 #if USE_CRC /* TODO get crc setting from DT */ 864 val |= BIT(4); 865 #else 866 val &= ~BIT(4); 867 #endif 868 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x1263, val); 869 if (rval) 870 goto out; 871 #endif 872 873 out: 874 if (rval) 875 et8ek8_power_off(sensor); 876 877 return rval; 878 } 879 880 /* -------------------------------------------------------------------------- 881 * V4L2 subdev video operations 882 */ 883 #define MAX_FMTS 4 884 static int et8ek8_enum_mbus_code(struct v4l2_subdev *subdev, 885 struct v4l2_subdev_pad_config *cfg, 886 struct v4l2_subdev_mbus_code_enum *code) 887 { 888 struct et8ek8_reglist **list = 889 et8ek8_reglist_first(&meta_reglist); 890 u32 pixelformat[MAX_FMTS]; 891 int npixelformat = 0; 892 893 if (code->index >= MAX_FMTS) 894 return -EINVAL; 895 896 for (; *list; list++) { 897 struct et8ek8_mode *mode = &(*list)->mode; 898 int i; 899 900 if ((*list)->type != ET8EK8_REGLIST_MODE) 901 continue; 902 903 for (i = 0; i < npixelformat; i++) { 904 if (pixelformat[i] == mode->bus_format) 905 break; 906 } 907 if (i != npixelformat) 908 continue; 909 910 if (code->index == npixelformat) { 911 code->code = mode->bus_format; 912 return 0; 913 } 914 915 pixelformat[npixelformat] = mode->bus_format; 916 npixelformat++; 917 } 918 919 return -EINVAL; 920 } 921 922 static int et8ek8_enum_frame_size(struct v4l2_subdev *subdev, 923 struct v4l2_subdev_pad_config *cfg, 924 struct v4l2_subdev_frame_size_enum *fse) 925 { 926 struct et8ek8_reglist **list = 927 et8ek8_reglist_first(&meta_reglist); 928 struct v4l2_mbus_framefmt format; 929 int cmp_width = INT_MAX; 930 int cmp_height = INT_MAX; 931 int index = fse->index; 932 933 for (; *list; list++) { 934 if ((*list)->type != ET8EK8_REGLIST_MODE) 935 continue; 936 937 et8ek8_reglist_to_mbus(*list, &format); 938 if (fse->code != format.code) 939 continue; 940 941 /* Assume that the modes are grouped by frame size. */ 942 if (format.width == cmp_width && format.height == cmp_height) 943 continue; 944 945 cmp_width = format.width; 946 cmp_height = format.height; 947 948 if (index-- == 0) { 949 fse->min_width = format.width; 950 fse->min_height = format.height; 951 fse->max_width = format.width; 952 fse->max_height = format.height; 953 return 0; 954 } 955 } 956 957 return -EINVAL; 958 } 959 960 static int et8ek8_enum_frame_ival(struct v4l2_subdev *subdev, 961 struct v4l2_subdev_pad_config *cfg, 962 struct v4l2_subdev_frame_interval_enum *fie) 963 { 964 struct et8ek8_reglist **list = 965 et8ek8_reglist_first(&meta_reglist); 966 struct v4l2_mbus_framefmt format; 967 int index = fie->index; 968 969 for (; *list; list++) { 970 struct et8ek8_mode *mode = &(*list)->mode; 971 972 if ((*list)->type != ET8EK8_REGLIST_MODE) 973 continue; 974 975 et8ek8_reglist_to_mbus(*list, &format); 976 if (fie->code != format.code) 977 continue; 978 979 if (fie->width != format.width || fie->height != format.height) 980 continue; 981 982 if (index-- == 0) { 983 fie->interval = mode->timeperframe; 984 return 0; 985 } 986 } 987 988 return -EINVAL; 989 } 990 991 static struct v4l2_mbus_framefmt * 992 __et8ek8_get_pad_format(struct et8ek8_sensor *sensor, 993 struct v4l2_subdev_pad_config *cfg, 994 unsigned int pad, enum v4l2_subdev_format_whence which) 995 { 996 switch (which) { 997 case V4L2_SUBDEV_FORMAT_TRY: 998 return v4l2_subdev_get_try_format(&sensor->subdev, cfg, pad); 999 case V4L2_SUBDEV_FORMAT_ACTIVE: 1000 return &sensor->format; 1001 default: 1002 return NULL; 1003 } 1004 } 1005 1006 static int et8ek8_get_pad_format(struct v4l2_subdev *subdev, 1007 struct v4l2_subdev_pad_config *cfg, 1008 struct v4l2_subdev_format *fmt) 1009 { 1010 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1011 struct v4l2_mbus_framefmt *format; 1012 1013 format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which); 1014 if (!format) 1015 return -EINVAL; 1016 1017 fmt->format = *format; 1018 1019 return 0; 1020 } 1021 1022 static int et8ek8_set_pad_format(struct v4l2_subdev *subdev, 1023 struct v4l2_subdev_pad_config *cfg, 1024 struct v4l2_subdev_format *fmt) 1025 { 1026 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1027 struct v4l2_mbus_framefmt *format; 1028 struct et8ek8_reglist *reglist; 1029 1030 format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which); 1031 if (!format) 1032 return -EINVAL; 1033 1034 reglist = et8ek8_reglist_find_mode_fmt(&meta_reglist, &fmt->format); 1035 et8ek8_reglist_to_mbus(reglist, &fmt->format); 1036 *format = fmt->format; 1037 1038 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 1039 sensor->current_reglist = reglist; 1040 et8ek8_update_controls(sensor); 1041 } 1042 1043 return 0; 1044 } 1045 1046 static int et8ek8_get_frame_interval(struct v4l2_subdev *subdev, 1047 struct v4l2_subdev_frame_interval *fi) 1048 { 1049 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1050 1051 memset(fi, 0, sizeof(*fi)); 1052 fi->interval = sensor->current_reglist->mode.timeperframe; 1053 1054 return 0; 1055 } 1056 1057 static int et8ek8_set_frame_interval(struct v4l2_subdev *subdev, 1058 struct v4l2_subdev_frame_interval *fi) 1059 { 1060 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1061 struct et8ek8_reglist *reglist; 1062 1063 reglist = et8ek8_reglist_find_mode_ival(&meta_reglist, 1064 sensor->current_reglist, 1065 &fi->interval); 1066 1067 if (!reglist) 1068 return -EINVAL; 1069 1070 if (sensor->current_reglist->mode.ext_clock != reglist->mode.ext_clock) 1071 return -EINVAL; 1072 1073 sensor->current_reglist = reglist; 1074 et8ek8_update_controls(sensor); 1075 1076 return 0; 1077 } 1078 1079 static int et8ek8_g_priv_mem(struct v4l2_subdev *subdev) 1080 { 1081 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1082 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1083 unsigned int length = ET8EK8_PRIV_MEM_SIZE; 1084 unsigned int offset = 0; 1085 u8 *ptr = sensor->priv_mem; 1086 int rval = 0; 1087 1088 /* Read the EEPROM window-by-window, each window 8 bytes */ 1089 do { 1090 u8 buffer[PRIV_MEM_WIN_SIZE]; 1091 struct i2c_msg msg; 1092 int bytes, i; 1093 int ofs; 1094 1095 /* Set the current window */ 1096 rval = et8ek8_i2c_write_reg(client, ET8EK8_REG_8BIT, 0x0001, 1097 0xe0 | (offset >> 3)); 1098 if (rval < 0) 1099 return rval; 1100 1101 /* Wait for status bit */ 1102 for (i = 0; i < 1000; ++i) { 1103 u32 status; 1104 1105 rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, 1106 0x0003, &status); 1107 if (rval < 0) 1108 return rval; 1109 if (!(status & 0x08)) 1110 break; 1111 usleep_range(1000, 2000); 1112 } 1113 1114 if (i == 1000) 1115 return -EIO; 1116 1117 /* Read window, 8 bytes at once, and copy to user space */ 1118 ofs = offset & 0x07; /* Offset within this window */ 1119 bytes = length + ofs > 8 ? 8-ofs : length; 1120 msg.addr = client->addr; 1121 msg.flags = 0; 1122 msg.len = 2; 1123 msg.buf = buffer; 1124 ofs += PRIV_MEM_START_REG; 1125 buffer[0] = (u8)(ofs >> 8); 1126 buffer[1] = (u8)(ofs & 0xFF); 1127 1128 rval = i2c_transfer(client->adapter, &msg, 1); 1129 if (rval < 0) 1130 return rval; 1131 1132 mdelay(ET8EK8_I2C_DELAY); 1133 msg.addr = client->addr; 1134 msg.len = bytes; 1135 msg.flags = I2C_M_RD; 1136 msg.buf = buffer; 1137 memset(buffer, 0, sizeof(buffer)); 1138 1139 rval = i2c_transfer(client->adapter, &msg, 1); 1140 if (rval < 0) 1141 return rval; 1142 1143 rval = 0; 1144 memcpy(ptr, buffer, bytes); 1145 1146 length -= bytes; 1147 offset += bytes; 1148 ptr += bytes; 1149 } while (length > 0); 1150 1151 return rval; 1152 } 1153 1154 static int et8ek8_dev_init(struct v4l2_subdev *subdev) 1155 { 1156 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1157 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1158 int rval, rev_l, rev_h; 1159 1160 rval = et8ek8_power_on(sensor); 1161 if (rval) { 1162 dev_err(&client->dev, "could not power on\n"); 1163 return rval; 1164 } 1165 1166 rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, 1167 REG_REVISION_NUMBER_L, &rev_l); 1168 if (!rval) 1169 rval = et8ek8_i2c_read_reg(client, ET8EK8_REG_8BIT, 1170 REG_REVISION_NUMBER_H, &rev_h); 1171 if (rval) { 1172 dev_err(&client->dev, "no et8ek8 sensor detected\n"); 1173 goto out_poweroff; 1174 } 1175 1176 sensor->version = (rev_h << 8) + rev_l; 1177 if (sensor->version != ET8EK8_REV_1 && sensor->version != ET8EK8_REV_2) 1178 dev_info(&client->dev, 1179 "unknown version 0x%x detected, continuing anyway\n", 1180 sensor->version); 1181 1182 rval = et8ek8_reglist_import(client, &meta_reglist); 1183 if (rval) { 1184 dev_err(&client->dev, 1185 "invalid register list %s, import failed\n", 1186 ET8EK8_NAME); 1187 goto out_poweroff; 1188 } 1189 1190 sensor->current_reglist = et8ek8_reglist_find_type(&meta_reglist, 1191 ET8EK8_REGLIST_MODE); 1192 if (!sensor->current_reglist) { 1193 dev_err(&client->dev, 1194 "invalid register list %s, no mode found\n", 1195 ET8EK8_NAME); 1196 rval = -ENODEV; 1197 goto out_poweroff; 1198 } 1199 1200 et8ek8_reglist_to_mbus(sensor->current_reglist, &sensor->format); 1201 1202 rval = et8ek8_i2c_reglist_find_write(client, &meta_reglist, 1203 ET8EK8_REGLIST_POWERON); 1204 if (rval) { 1205 dev_err(&client->dev, 1206 "invalid register list %s, no POWERON mode found\n", 1207 ET8EK8_NAME); 1208 goto out_poweroff; 1209 } 1210 rval = et8ek8_stream_on(sensor); /* Needed to be able to read EEPROM */ 1211 if (rval) 1212 goto out_poweroff; 1213 rval = et8ek8_g_priv_mem(subdev); 1214 if (rval) 1215 dev_warn(&client->dev, 1216 "can not read OTP (EEPROM) memory from sensor\n"); 1217 rval = et8ek8_stream_off(sensor); 1218 if (rval) 1219 goto out_poweroff; 1220 1221 rval = et8ek8_power_off(sensor); 1222 if (rval) 1223 goto out_poweroff; 1224 1225 return 0; 1226 1227 out_poweroff: 1228 et8ek8_power_off(sensor); 1229 1230 return rval; 1231 } 1232 1233 /* -------------------------------------------------------------------------- 1234 * sysfs attributes 1235 */ 1236 static ssize_t 1237 et8ek8_priv_mem_read(struct device *dev, struct device_attribute *attr, 1238 char *buf) 1239 { 1240 struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev)); 1241 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1242 1243 #if PAGE_SIZE < ET8EK8_PRIV_MEM_SIZE 1244 #error PAGE_SIZE too small! 1245 #endif 1246 1247 memcpy(buf, sensor->priv_mem, ET8EK8_PRIV_MEM_SIZE); 1248 1249 return ET8EK8_PRIV_MEM_SIZE; 1250 } 1251 static DEVICE_ATTR(priv_mem, 0444, et8ek8_priv_mem_read, NULL); 1252 1253 /* -------------------------------------------------------------------------- 1254 * V4L2 subdev core operations 1255 */ 1256 1257 static int 1258 et8ek8_registered(struct v4l2_subdev *subdev) 1259 { 1260 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1261 struct i2c_client *client = v4l2_get_subdevdata(subdev); 1262 int rval; 1263 1264 dev_dbg(&client->dev, "registered!"); 1265 1266 rval = device_create_file(&client->dev, &dev_attr_priv_mem); 1267 if (rval) { 1268 dev_err(&client->dev, "could not register sysfs entry\n"); 1269 return rval; 1270 } 1271 1272 rval = et8ek8_dev_init(subdev); 1273 if (rval) 1274 goto err_file; 1275 1276 rval = et8ek8_init_controls(sensor); 1277 if (rval) { 1278 dev_err(&client->dev, "controls initialization failed\n"); 1279 goto err_file; 1280 } 1281 1282 __et8ek8_get_pad_format(sensor, NULL, 0, V4L2_SUBDEV_FORMAT_ACTIVE); 1283 1284 return 0; 1285 1286 err_file: 1287 device_remove_file(&client->dev, &dev_attr_priv_mem); 1288 1289 return rval; 1290 } 1291 1292 static int __et8ek8_set_power(struct et8ek8_sensor *sensor, bool on) 1293 { 1294 return on ? et8ek8_power_on(sensor) : et8ek8_power_off(sensor); 1295 } 1296 1297 static int et8ek8_set_power(struct v4l2_subdev *subdev, int on) 1298 { 1299 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1300 int ret = 0; 1301 1302 mutex_lock(&sensor->power_lock); 1303 1304 /* If the power count is modified from 0 to != 0 or from != 0 to 0, 1305 * update the power state. 1306 */ 1307 if (sensor->power_count == !on) { 1308 ret = __et8ek8_set_power(sensor, !!on); 1309 if (ret < 0) 1310 goto done; 1311 } 1312 1313 /* Update the power count. */ 1314 sensor->power_count += on ? 1 : -1; 1315 WARN_ON(sensor->power_count < 0); 1316 1317 done: 1318 mutex_unlock(&sensor->power_lock); 1319 1320 return ret; 1321 } 1322 1323 static int et8ek8_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1324 { 1325 struct et8ek8_sensor *sensor = to_et8ek8_sensor(sd); 1326 struct v4l2_mbus_framefmt *format; 1327 struct et8ek8_reglist *reglist; 1328 1329 reglist = et8ek8_reglist_find_type(&meta_reglist, ET8EK8_REGLIST_MODE); 1330 format = __et8ek8_get_pad_format(sensor, fh->pad, 0, 1331 V4L2_SUBDEV_FORMAT_TRY); 1332 et8ek8_reglist_to_mbus(reglist, format); 1333 1334 return et8ek8_set_power(sd, true); 1335 } 1336 1337 static int et8ek8_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1338 { 1339 return et8ek8_set_power(sd, false); 1340 } 1341 1342 static const struct v4l2_subdev_video_ops et8ek8_video_ops = { 1343 .s_stream = et8ek8_s_stream, 1344 .g_frame_interval = et8ek8_get_frame_interval, 1345 .s_frame_interval = et8ek8_set_frame_interval, 1346 }; 1347 1348 static const struct v4l2_subdev_core_ops et8ek8_core_ops = { 1349 .s_power = et8ek8_set_power, 1350 }; 1351 1352 static const struct v4l2_subdev_pad_ops et8ek8_pad_ops = { 1353 .enum_mbus_code = et8ek8_enum_mbus_code, 1354 .enum_frame_size = et8ek8_enum_frame_size, 1355 .enum_frame_interval = et8ek8_enum_frame_ival, 1356 .get_fmt = et8ek8_get_pad_format, 1357 .set_fmt = et8ek8_set_pad_format, 1358 }; 1359 1360 static const struct v4l2_subdev_ops et8ek8_ops = { 1361 .core = &et8ek8_core_ops, 1362 .video = &et8ek8_video_ops, 1363 .pad = &et8ek8_pad_ops, 1364 }; 1365 1366 static const struct v4l2_subdev_internal_ops et8ek8_internal_ops = { 1367 .registered = et8ek8_registered, 1368 .open = et8ek8_open, 1369 .close = et8ek8_close, 1370 }; 1371 1372 /* -------------------------------------------------------------------------- 1373 * I2C driver 1374 */ 1375 static int __maybe_unused et8ek8_suspend(struct device *dev) 1376 { 1377 struct i2c_client *client = to_i2c_client(dev); 1378 struct v4l2_subdev *subdev = i2c_get_clientdata(client); 1379 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1380 1381 if (!sensor->power_count) 1382 return 0; 1383 1384 return __et8ek8_set_power(sensor, false); 1385 } 1386 1387 static int __maybe_unused et8ek8_resume(struct device *dev) 1388 { 1389 struct i2c_client *client = to_i2c_client(dev); 1390 struct v4l2_subdev *subdev = i2c_get_clientdata(client); 1391 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1392 1393 if (!sensor->power_count) 1394 return 0; 1395 1396 return __et8ek8_set_power(sensor, true); 1397 } 1398 1399 static int et8ek8_probe(struct i2c_client *client, 1400 const struct i2c_device_id *devid) 1401 { 1402 struct et8ek8_sensor *sensor; 1403 struct device *dev = &client->dev; 1404 int ret; 1405 1406 sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL); 1407 if (!sensor) 1408 return -ENOMEM; 1409 1410 sensor->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); 1411 if (IS_ERR(sensor->reset)) { 1412 dev_dbg(&client->dev, "could not request reset gpio\n"); 1413 return PTR_ERR(sensor->reset); 1414 } 1415 1416 sensor->vana = devm_regulator_get(dev, "vana"); 1417 if (IS_ERR(sensor->vana)) { 1418 dev_err(&client->dev, "could not get regulator for vana\n"); 1419 return PTR_ERR(sensor->vana); 1420 } 1421 1422 sensor->ext_clk = devm_clk_get(dev, NULL); 1423 if (IS_ERR(sensor->ext_clk)) { 1424 dev_err(&client->dev, "could not get clock\n"); 1425 return PTR_ERR(sensor->ext_clk); 1426 } 1427 1428 ret = of_property_read_u32(dev->of_node, "clock-frequency", 1429 &sensor->xclk_freq); 1430 if (ret) { 1431 dev_warn(dev, "can't get clock-frequency\n"); 1432 return ret; 1433 } 1434 1435 mutex_init(&sensor->power_lock); 1436 1437 v4l2_i2c_subdev_init(&sensor->subdev, client, &et8ek8_ops); 1438 sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1439 sensor->subdev.internal_ops = &et8ek8_internal_ops; 1440 1441 sensor->pad.flags = MEDIA_PAD_FL_SOURCE; 1442 ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad); 1443 if (ret < 0) { 1444 dev_err(&client->dev, "media entity init failed!\n"); 1445 goto err_mutex; 1446 } 1447 1448 ret = v4l2_async_register_subdev(&sensor->subdev); 1449 if (ret < 0) 1450 goto err_entity; 1451 1452 dev_dbg(dev, "initialized!\n"); 1453 1454 return 0; 1455 1456 err_entity: 1457 media_entity_cleanup(&sensor->subdev.entity); 1458 err_mutex: 1459 mutex_destroy(&sensor->power_lock); 1460 return ret; 1461 } 1462 1463 static int __exit et8ek8_remove(struct i2c_client *client) 1464 { 1465 struct v4l2_subdev *subdev = i2c_get_clientdata(client); 1466 struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev); 1467 1468 if (sensor->power_count) { 1469 WARN_ON(1); 1470 et8ek8_power_off(sensor); 1471 sensor->power_count = 0; 1472 } 1473 1474 v4l2_device_unregister_subdev(&sensor->subdev); 1475 device_remove_file(&client->dev, &dev_attr_priv_mem); 1476 v4l2_ctrl_handler_free(&sensor->ctrl_handler); 1477 v4l2_async_unregister_subdev(&sensor->subdev); 1478 media_entity_cleanup(&sensor->subdev.entity); 1479 mutex_destroy(&sensor->power_lock); 1480 1481 return 0; 1482 } 1483 1484 static const struct of_device_id et8ek8_of_table[] = { 1485 { .compatible = "toshiba,et8ek8" }, 1486 { }, 1487 }; 1488 MODULE_DEVICE_TABLE(of, et8ek8_of_table); 1489 1490 static const struct i2c_device_id et8ek8_id_table[] = { 1491 { ET8EK8_NAME, 0 }, 1492 { } 1493 }; 1494 MODULE_DEVICE_TABLE(i2c, et8ek8_id_table); 1495 1496 static const struct dev_pm_ops et8ek8_pm_ops = { 1497 SET_SYSTEM_SLEEP_PM_OPS(et8ek8_suspend, et8ek8_resume) 1498 }; 1499 1500 static struct i2c_driver et8ek8_i2c_driver = { 1501 .driver = { 1502 .name = ET8EK8_NAME, 1503 .pm = &et8ek8_pm_ops, 1504 .of_match_table = et8ek8_of_table, 1505 }, 1506 .probe = et8ek8_probe, 1507 .remove = __exit_p(et8ek8_remove), 1508 .id_table = et8ek8_id_table, 1509 }; 1510 1511 module_i2c_driver(et8ek8_i2c_driver); 1512 1513 MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>, Pavel Machek <pavel@ucw.cz"); 1514 MODULE_DESCRIPTION("Toshiba ET8EK8 camera sensor driver"); 1515 MODULE_LICENSE("GPL"); 1516