1/* 2 * Driver for MT9V022 CMOS Image Sensor from Micron 3 * 4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/videodev2.h> 12#include <linux/slab.h> 13#include <linux/i2c.h> 14#include <linux/delay.h> 15#include <linux/log2.h> 16#include <linux/module.h> 17 18#include <media/soc_camera.h> 19#include <media/soc_mediabus.h> 20#include <media/v4l2-subdev.h> 21#include <media/v4l2-chip-ident.h> 22#include <media/v4l2-ctrls.h> 23 24/* 25 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c 26 * The platform has to define ctruct i2c_board_info objects and link to them 27 * from struct soc_camera_link 28 */ 29 30static char *sensor_type; 31module_param(sensor_type, charp, S_IRUGO); 32MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\""); 33 34/* mt9v022 selected register addresses */ 35#define MT9V022_CHIP_VERSION 0x00 36#define MT9V022_COLUMN_START 0x01 37#define MT9V022_ROW_START 0x02 38#define MT9V022_WINDOW_HEIGHT 0x03 39#define MT9V022_WINDOW_WIDTH 0x04 40#define MT9V022_HORIZONTAL_BLANKING 0x05 41#define MT9V022_VERTICAL_BLANKING 0x06 42#define MT9V022_CHIP_CONTROL 0x07 43#define MT9V022_SHUTTER_WIDTH1 0x08 44#define MT9V022_SHUTTER_WIDTH2 0x09 45#define MT9V022_SHUTTER_WIDTH_CTRL 0x0a 46#define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b 47#define MT9V022_RESET 0x0c 48#define MT9V022_READ_MODE 0x0d 49#define MT9V022_MONITOR_MODE 0x0e 50#define MT9V022_PIXEL_OPERATION_MODE 0x0f 51#define MT9V022_LED_OUT_CONTROL 0x1b 52#define MT9V022_ADC_MODE_CONTROL 0x1c 53#define MT9V022_ANALOG_GAIN 0x35 54#define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47 55#define MT9V022_PIXCLK_FV_LV 0x74 56#define MT9V022_DIGITAL_TEST_PATTERN 0x7f 57#define MT9V022_AEC_AGC_ENABLE 0xAF 58#define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD 59 60/* Progressive scan, master, defaults */ 61#define MT9V022_CHIP_CONTROL_DEFAULT 0x188 62 63#define MT9V022_MAX_WIDTH 752 64#define MT9V022_MAX_HEIGHT 480 65#define MT9V022_MIN_WIDTH 48 66#define MT9V022_MIN_HEIGHT 32 67#define MT9V022_COLUMN_SKIP 1 68#define MT9V022_ROW_SKIP 4 69 70/* MT9V022 has only one fixed colorspace per pixelcode */ 71struct mt9v022_datafmt { 72 enum v4l2_mbus_pixelcode code; 73 enum v4l2_colorspace colorspace; 74}; 75 76/* Find a data format by a pixel code in an array */ 77static const struct mt9v022_datafmt *mt9v022_find_datafmt( 78 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt, 79 int n) 80{ 81 int i; 82 for (i = 0; i < n; i++) 83 if (fmt[i].code == code) 84 return fmt + i; 85 86 return NULL; 87} 88 89static const struct mt9v022_datafmt mt9v022_colour_fmts[] = { 90 /* 91 * Order important: first natively supported, 92 * second supported with a GPIO extender 93 */ 94 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, 95 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB}, 96}; 97 98static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = { 99 /* Order important - see above */ 100 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG}, 101 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG}, 102}; 103 104struct mt9v022 { 105 struct v4l2_subdev subdev; 106 struct v4l2_ctrl_handler hdl; 107 struct { 108 /* exposure/auto-exposure cluster */ 109 struct v4l2_ctrl *autoexposure; 110 struct v4l2_ctrl *exposure; 111 }; 112 struct { 113 /* gain/auto-gain cluster */ 114 struct v4l2_ctrl *autogain; 115 struct v4l2_ctrl *gain; 116 }; 117 struct v4l2_rect rect; /* Sensor window */ 118 const struct mt9v022_datafmt *fmt; 119 const struct mt9v022_datafmt *fmts; 120 int num_fmts; 121 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */ 122 u16 chip_control; 123 unsigned short y_skip_top; /* Lines to skip at the top */ 124}; 125 126static struct mt9v022 *to_mt9v022(const struct i2c_client *client) 127{ 128 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev); 129} 130 131static int reg_read(struct i2c_client *client, const u8 reg) 132{ 133 return i2c_smbus_read_word_swapped(client, reg); 134} 135 136static int reg_write(struct i2c_client *client, const u8 reg, 137 const u16 data) 138{ 139 return i2c_smbus_write_word_swapped(client, reg, data); 140} 141 142static int reg_set(struct i2c_client *client, const u8 reg, 143 const u16 data) 144{ 145 int ret; 146 147 ret = reg_read(client, reg); 148 if (ret < 0) 149 return ret; 150 return reg_write(client, reg, ret | data); 151} 152 153static int reg_clear(struct i2c_client *client, const u8 reg, 154 const u16 data) 155{ 156 int ret; 157 158 ret = reg_read(client, reg); 159 if (ret < 0) 160 return ret; 161 return reg_write(client, reg, ret & ~data); 162} 163 164static int mt9v022_init(struct i2c_client *client) 165{ 166 struct mt9v022 *mt9v022 = to_mt9v022(client); 167 int ret; 168 169 /* 170 * Almost the default mode: master, parallel, simultaneous, and an 171 * undocumented bit 0x200, which is present in table 7, but not in 8, 172 * plus snapshot mode to disable scan for now 173 */ 174 mt9v022->chip_control |= 0x10; 175 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control); 176 if (!ret) 177 ret = reg_write(client, MT9V022_READ_MODE, 0x300); 178 179 /* All defaults */ 180 if (!ret) 181 /* AEC, AGC on */ 182 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3); 183 if (!ret) 184 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16); 185 if (!ret) 186 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480); 187 if (!ret) 188 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480); 189 if (!ret) 190 /* default - auto */ 191 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1); 192 if (!ret) 193 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0); 194 if (!ret) 195 return v4l2_ctrl_handler_setup(&mt9v022->hdl); 196 197 return ret; 198} 199 200static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable) 201{ 202 struct i2c_client *client = v4l2_get_subdevdata(sd); 203 struct mt9v022 *mt9v022 = to_mt9v022(client); 204 205 if (enable) 206 /* Switch to master "normal" mode */ 207 mt9v022->chip_control &= ~0x10; 208 else 209 /* Switch to snapshot mode */ 210 mt9v022->chip_control |= 0x10; 211 212 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0) 213 return -EIO; 214 return 0; 215} 216 217static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) 218{ 219 struct i2c_client *client = v4l2_get_subdevdata(sd); 220 struct mt9v022 *mt9v022 = to_mt9v022(client); 221 struct v4l2_rect rect = a->c; 222 int ret; 223 224 /* Bayer format - even size lengths */ 225 if (mt9v022->fmts == mt9v022_colour_fmts) { 226 rect.width = ALIGN(rect.width, 2); 227 rect.height = ALIGN(rect.height, 2); 228 /* Let the user play with the starting pixel */ 229 } 230 231 soc_camera_limit_side(&rect.left, &rect.width, 232 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH); 233 234 soc_camera_limit_side(&rect.top, &rect.height, 235 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT); 236 237 /* Like in example app. Contradicts the datasheet though */ 238 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE); 239 if (ret >= 0) { 240 if (ret & 1) /* Autoexposure */ 241 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 242 rect.height + mt9v022->y_skip_top + 43); 243 else 244 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 245 rect.height + mt9v022->y_skip_top + 43); 246 } 247 /* Setup frame format: defaults apart from width and height */ 248 if (!ret) 249 ret = reg_write(client, MT9V022_COLUMN_START, rect.left); 250 if (!ret) 251 ret = reg_write(client, MT9V022_ROW_START, rect.top); 252 if (!ret) 253 /* 254 * Default 94, Phytec driver says: 255 * "width + horizontal blank >= 660" 256 */ 257 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING, 258 rect.width > 660 - 43 ? 43 : 259 660 - rect.width); 260 if (!ret) 261 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45); 262 if (!ret) 263 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width); 264 if (!ret) 265 ret = reg_write(client, MT9V022_WINDOW_HEIGHT, 266 rect.height + mt9v022->y_skip_top); 267 268 if (ret < 0) 269 return ret; 270 271 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height); 272 273 mt9v022->rect = rect; 274 275 return 0; 276} 277 278static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) 279{ 280 struct i2c_client *client = v4l2_get_subdevdata(sd); 281 struct mt9v022 *mt9v022 = to_mt9v022(client); 282 283 a->c = mt9v022->rect; 284 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 285 286 return 0; 287} 288 289static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) 290{ 291 a->bounds.left = MT9V022_COLUMN_SKIP; 292 a->bounds.top = MT9V022_ROW_SKIP; 293 a->bounds.width = MT9V022_MAX_WIDTH; 294 a->bounds.height = MT9V022_MAX_HEIGHT; 295 a->defrect = a->bounds; 296 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 297 a->pixelaspect.numerator = 1; 298 a->pixelaspect.denominator = 1; 299 300 return 0; 301} 302 303static int mt9v022_g_fmt(struct v4l2_subdev *sd, 304 struct v4l2_mbus_framefmt *mf) 305{ 306 struct i2c_client *client = v4l2_get_subdevdata(sd); 307 struct mt9v022 *mt9v022 = to_mt9v022(client); 308 309 mf->width = mt9v022->rect.width; 310 mf->height = mt9v022->rect.height; 311 mf->code = mt9v022->fmt->code; 312 mf->colorspace = mt9v022->fmt->colorspace; 313 mf->field = V4L2_FIELD_NONE; 314 315 return 0; 316} 317 318static int mt9v022_s_fmt(struct v4l2_subdev *sd, 319 struct v4l2_mbus_framefmt *mf) 320{ 321 struct i2c_client *client = v4l2_get_subdevdata(sd); 322 struct mt9v022 *mt9v022 = to_mt9v022(client); 323 struct v4l2_crop a = { 324 .c = { 325 .left = mt9v022->rect.left, 326 .top = mt9v022->rect.top, 327 .width = mf->width, 328 .height = mf->height, 329 }, 330 }; 331 int ret; 332 333 /* 334 * The caller provides a supported format, as verified per call to 335 * .try_mbus_fmt(), datawidth is from our supported format list 336 */ 337 switch (mf->code) { 338 case V4L2_MBUS_FMT_Y8_1X8: 339 case V4L2_MBUS_FMT_Y10_1X10: 340 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM) 341 return -EINVAL; 342 break; 343 case V4L2_MBUS_FMT_SBGGR8_1X8: 344 case V4L2_MBUS_FMT_SBGGR10_1X10: 345 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC) 346 return -EINVAL; 347 break; 348 default: 349 return -EINVAL; 350 } 351 352 /* No support for scaling on this camera, just crop. */ 353 ret = mt9v022_s_crop(sd, &a); 354 if (!ret) { 355 mf->width = mt9v022->rect.width; 356 mf->height = mt9v022->rect.height; 357 mt9v022->fmt = mt9v022_find_datafmt(mf->code, 358 mt9v022->fmts, mt9v022->num_fmts); 359 mf->colorspace = mt9v022->fmt->colorspace; 360 } 361 362 return ret; 363} 364 365static int mt9v022_try_fmt(struct v4l2_subdev *sd, 366 struct v4l2_mbus_framefmt *mf) 367{ 368 struct i2c_client *client = v4l2_get_subdevdata(sd); 369 struct mt9v022 *mt9v022 = to_mt9v022(client); 370 const struct mt9v022_datafmt *fmt; 371 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 || 372 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10; 373 374 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH, 375 MT9V022_MAX_WIDTH, align, 376 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top, 377 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0); 378 379 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts, 380 mt9v022->num_fmts); 381 if (!fmt) { 382 fmt = mt9v022->fmt; 383 mf->code = fmt->code; 384 } 385 386 mf->colorspace = fmt->colorspace; 387 388 return 0; 389} 390 391static int mt9v022_g_chip_ident(struct v4l2_subdev *sd, 392 struct v4l2_dbg_chip_ident *id) 393{ 394 struct i2c_client *client = v4l2_get_subdevdata(sd); 395 struct mt9v022 *mt9v022 = to_mt9v022(client); 396 397 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) 398 return -EINVAL; 399 400 if (id->match.addr != client->addr) 401 return -ENODEV; 402 403 id->ident = mt9v022->model; 404 id->revision = 0; 405 406 return 0; 407} 408 409#ifdef CONFIG_VIDEO_ADV_DEBUG 410static int mt9v022_g_register(struct v4l2_subdev *sd, 411 struct v4l2_dbg_register *reg) 412{ 413 struct i2c_client *client = v4l2_get_subdevdata(sd); 414 415 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) 416 return -EINVAL; 417 418 if (reg->match.addr != client->addr) 419 return -ENODEV; 420 421 reg->size = 2; 422 reg->val = reg_read(client, reg->reg); 423 424 if (reg->val > 0xffff) 425 return -EIO; 426 427 return 0; 428} 429 430static int mt9v022_s_register(struct v4l2_subdev *sd, 431 struct v4l2_dbg_register *reg) 432{ 433 struct i2c_client *client = v4l2_get_subdevdata(sd); 434 435 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff) 436 return -EINVAL; 437 438 if (reg->match.addr != client->addr) 439 return -ENODEV; 440 441 if (reg_write(client, reg->reg, reg->val) < 0) 442 return -EIO; 443 444 return 0; 445} 446#endif 447 448static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 449{ 450 struct mt9v022 *mt9v022 = container_of(ctrl->handler, 451 struct mt9v022, hdl); 452 struct v4l2_subdev *sd = &mt9v022->subdev; 453 struct i2c_client *client = v4l2_get_subdevdata(sd); 454 struct v4l2_ctrl *gain = mt9v022->gain; 455 struct v4l2_ctrl *exp = mt9v022->exposure; 456 unsigned long range; 457 int data; 458 459 switch (ctrl->id) { 460 case V4L2_CID_AUTOGAIN: 461 data = reg_read(client, MT9V022_ANALOG_GAIN); 462 if (data < 0) 463 return -EIO; 464 465 range = gain->maximum - gain->minimum; 466 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum; 467 return 0; 468 case V4L2_CID_EXPOSURE_AUTO: 469 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH); 470 if (data < 0) 471 return -EIO; 472 473 range = exp->maximum - exp->minimum; 474 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum; 475 return 0; 476 } 477 return -EINVAL; 478} 479 480static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl) 481{ 482 struct mt9v022 *mt9v022 = container_of(ctrl->handler, 483 struct mt9v022, hdl); 484 struct v4l2_subdev *sd = &mt9v022->subdev; 485 struct i2c_client *client = v4l2_get_subdevdata(sd); 486 int data; 487 488 switch (ctrl->id) { 489 case V4L2_CID_VFLIP: 490 if (ctrl->val) 491 data = reg_set(client, MT9V022_READ_MODE, 0x10); 492 else 493 data = reg_clear(client, MT9V022_READ_MODE, 0x10); 494 if (data < 0) 495 return -EIO; 496 return 0; 497 case V4L2_CID_HFLIP: 498 if (ctrl->val) 499 data = reg_set(client, MT9V022_READ_MODE, 0x20); 500 else 501 data = reg_clear(client, MT9V022_READ_MODE, 0x20); 502 if (data < 0) 503 return -EIO; 504 return 0; 505 case V4L2_CID_AUTOGAIN: 506 if (ctrl->val) { 507 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0) 508 return -EIO; 509 } else { 510 struct v4l2_ctrl *gain = mt9v022->gain; 511 /* mt9v022 has minimum == default */ 512 unsigned long range = gain->maximum - gain->minimum; 513 /* Valid values 16 to 64, 32 to 64 must be even. */ 514 unsigned long gain_val = ((gain->val - gain->minimum) * 515 48 + range / 2) / range + 16; 516 517 if (gain_val >= 32) 518 gain_val &= ~1; 519 520 /* 521 * The user wants to set gain manually, hope, she 522 * knows, what she's doing... Switch AGC off. 523 */ 524 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0) 525 return -EIO; 526 527 dev_dbg(&client->dev, "Setting gain from %d to %lu\n", 528 reg_read(client, MT9V022_ANALOG_GAIN), gain_val); 529 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0) 530 return -EIO; 531 } 532 return 0; 533 case V4L2_CID_EXPOSURE_AUTO: 534 if (ctrl->val == V4L2_EXPOSURE_AUTO) { 535 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1); 536 } else { 537 struct v4l2_ctrl *exp = mt9v022->exposure; 538 unsigned long range = exp->maximum - exp->minimum; 539 unsigned long shutter = ((exp->val - exp->minimum) * 540 479 + range / 2) / range + 1; 541 542 /* 543 * The user wants to set shutter width manually, hope, 544 * she knows, what she's doing... Switch AEC off. 545 */ 546 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1); 547 if (data < 0) 548 return -EIO; 549 dev_dbg(&client->dev, "Shutter width from %d to %lu\n", 550 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH), 551 shutter); 552 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 553 shutter) < 0) 554 return -EIO; 555 } 556 return 0; 557 } 558 return -EINVAL; 559} 560 561/* 562 * Interface active, can use i2c. If it fails, it can indeed mean, that 563 * this wasn't our capture interface, so, we wait for the right one 564 */ 565static int mt9v022_video_probe(struct i2c_client *client) 566{ 567 struct mt9v022 *mt9v022 = to_mt9v022(client); 568 struct soc_camera_link *icl = soc_camera_i2c_to_link(client); 569 s32 data; 570 int ret; 571 unsigned long flags; 572 573 /* Read out the chip version register */ 574 data = reg_read(client, MT9V022_CHIP_VERSION); 575 576 /* must be 0x1311 or 0x1313 */ 577 if (data != 0x1311 && data != 0x1313) { 578 ret = -ENODEV; 579 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n", 580 data); 581 goto ei2c; 582 } 583 584 /* Soft reset */ 585 ret = reg_write(client, MT9V022_RESET, 1); 586 if (ret < 0) 587 goto ei2c; 588 /* 15 clock cycles */ 589 udelay(200); 590 if (reg_read(client, MT9V022_RESET)) { 591 dev_err(&client->dev, "Resetting MT9V022 failed!\n"); 592 if (ret > 0) 593 ret = -EIO; 594 goto ei2c; 595 } 596 597 /* Set monochrome or colour sensor type */ 598 if (sensor_type && (!strcmp("colour", sensor_type) || 599 !strcmp("color", sensor_type))) { 600 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11); 601 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC; 602 mt9v022->fmts = mt9v022_colour_fmts; 603 } else { 604 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11); 605 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM; 606 mt9v022->fmts = mt9v022_monochrome_fmts; 607 } 608 609 if (ret < 0) 610 goto ei2c; 611 612 mt9v022->num_fmts = 0; 613 614 /* 615 * This is a 10bit sensor, so by default we only allow 10bit. 616 * The platform may support different bus widths due to 617 * different routing of the data lines. 618 */ 619 if (icl->query_bus_param) 620 flags = icl->query_bus_param(icl); 621 else 622 flags = SOCAM_DATAWIDTH_10; 623 624 if (flags & SOCAM_DATAWIDTH_10) 625 mt9v022->num_fmts++; 626 else 627 mt9v022->fmts++; 628 629 if (flags & SOCAM_DATAWIDTH_8) 630 mt9v022->num_fmts++; 631 632 mt9v022->fmt = &mt9v022->fmts[0]; 633 634 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n", 635 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ? 636 "monochrome" : "colour"); 637 638 ret = mt9v022_init(client); 639 if (ret < 0) 640 dev_err(&client->dev, "Failed to initialise the camera\n"); 641 642ei2c: 643 return ret; 644} 645 646static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) 647{ 648 struct i2c_client *client = v4l2_get_subdevdata(sd); 649 struct mt9v022 *mt9v022 = to_mt9v022(client); 650 651 *lines = mt9v022->y_skip_top; 652 653 return 0; 654} 655 656static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = { 657 .g_volatile_ctrl = mt9v022_g_volatile_ctrl, 658 .s_ctrl = mt9v022_s_ctrl, 659}; 660 661static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = { 662 .g_chip_ident = mt9v022_g_chip_ident, 663#ifdef CONFIG_VIDEO_ADV_DEBUG 664 .g_register = mt9v022_g_register, 665 .s_register = mt9v022_s_register, 666#endif 667}; 668 669static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index, 670 enum v4l2_mbus_pixelcode *code) 671{ 672 struct i2c_client *client = v4l2_get_subdevdata(sd); 673 struct mt9v022 *mt9v022 = to_mt9v022(client); 674 675 if (index >= mt9v022->num_fmts) 676 return -EINVAL; 677 678 *code = mt9v022->fmts[index].code; 679 return 0; 680} 681 682static int mt9v022_g_mbus_config(struct v4l2_subdev *sd, 683 struct v4l2_mbus_config *cfg) 684{ 685 struct i2c_client *client = v4l2_get_subdevdata(sd); 686 struct soc_camera_link *icl = soc_camera_i2c_to_link(client); 687 688 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE | 689 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | 690 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW | 691 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | 692 V4L2_MBUS_DATA_ACTIVE_HIGH; 693 cfg->type = V4L2_MBUS_PARALLEL; 694 cfg->flags = soc_camera_apply_board_flags(icl, cfg); 695 696 return 0; 697} 698 699static int mt9v022_s_mbus_config(struct v4l2_subdev *sd, 700 const struct v4l2_mbus_config *cfg) 701{ 702 struct i2c_client *client = v4l2_get_subdevdata(sd); 703 struct soc_camera_link *icl = soc_camera_i2c_to_link(client); 704 struct mt9v022 *mt9v022 = to_mt9v022(client); 705 unsigned long flags = soc_camera_apply_board_flags(icl, cfg); 706 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample; 707 int ret; 708 u16 pixclk = 0; 709 710 if (icl->set_bus_param) { 711 ret = icl->set_bus_param(icl, 1 << (bps - 1)); 712 if (ret) 713 return ret; 714 } else if (bps != 10) { 715 /* 716 * Without board specific bus width settings we only support the 717 * sensors native bus width 718 */ 719 return -EINVAL; 720 } 721 722 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) 723 pixclk |= 0x10; 724 725 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)) 726 pixclk |= 0x1; 727 728 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)) 729 pixclk |= 0x2; 730 731 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk); 732 if (ret < 0) 733 return ret; 734 735 if (!(flags & V4L2_MBUS_MASTER)) 736 mt9v022->chip_control &= ~0x8; 737 738 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control); 739 if (ret < 0) 740 return ret; 741 742 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n", 743 pixclk, mt9v022->chip_control); 744 745 return 0; 746} 747 748static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = { 749 .s_stream = mt9v022_s_stream, 750 .s_mbus_fmt = mt9v022_s_fmt, 751 .g_mbus_fmt = mt9v022_g_fmt, 752 .try_mbus_fmt = mt9v022_try_fmt, 753 .s_crop = mt9v022_s_crop, 754 .g_crop = mt9v022_g_crop, 755 .cropcap = mt9v022_cropcap, 756 .enum_mbus_fmt = mt9v022_enum_fmt, 757 .g_mbus_config = mt9v022_g_mbus_config, 758 .s_mbus_config = mt9v022_s_mbus_config, 759}; 760 761static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = { 762 .g_skip_top_lines = mt9v022_g_skip_top_lines, 763}; 764 765static struct v4l2_subdev_ops mt9v022_subdev_ops = { 766 .core = &mt9v022_subdev_core_ops, 767 .video = &mt9v022_subdev_video_ops, 768 .sensor = &mt9v022_subdev_sensor_ops, 769}; 770 771static int mt9v022_probe(struct i2c_client *client, 772 const struct i2c_device_id *did) 773{ 774 struct mt9v022 *mt9v022; 775 struct soc_camera_link *icl = soc_camera_i2c_to_link(client); 776 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); 777 int ret; 778 779 if (!icl) { 780 dev_err(&client->dev, "MT9V022 driver needs platform data\n"); 781 return -EINVAL; 782 } 783 784 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { 785 dev_warn(&adapter->dev, 786 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); 787 return -EIO; 788 } 789 790 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL); 791 if (!mt9v022) 792 return -ENOMEM; 793 794 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops); 795 v4l2_ctrl_handler_init(&mt9v022->hdl, 6); 796 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops, 797 V4L2_CID_VFLIP, 0, 1, 1, 0); 798 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops, 799 V4L2_CID_HFLIP, 0, 1, 1, 0); 800 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops, 801 V4L2_CID_AUTOGAIN, 0, 1, 1, 1); 802 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops, 803 V4L2_CID_GAIN, 0, 127, 1, 64); 804 805 /* 806 * Simulated autoexposure. If enabled, we calculate shutter width 807 * ourselves in the driver based on vertical blanking and frame width 808 */ 809 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl, 810 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, 811 V4L2_EXPOSURE_AUTO); 812 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops, 813 V4L2_CID_EXPOSURE, 1, 255, 1, 255); 814 815 mt9v022->subdev.ctrl_handler = &mt9v022->hdl; 816 if (mt9v022->hdl.error) { 817 int err = mt9v022->hdl.error; 818 819 kfree(mt9v022); 820 return err; 821 } 822 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure, 823 V4L2_EXPOSURE_MANUAL, true); 824 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true); 825 826 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT; 827 828 /* 829 * MT9V022 _really_ corrupts the first read out line. 830 * TODO: verify on i.MX31 831 */ 832 mt9v022->y_skip_top = 1; 833 mt9v022->rect.left = MT9V022_COLUMN_SKIP; 834 mt9v022->rect.top = MT9V022_ROW_SKIP; 835 mt9v022->rect.width = MT9V022_MAX_WIDTH; 836 mt9v022->rect.height = MT9V022_MAX_HEIGHT; 837 838 ret = mt9v022_video_probe(client); 839 if (ret) { 840 v4l2_ctrl_handler_free(&mt9v022->hdl); 841 kfree(mt9v022); 842 } 843 844 return ret; 845} 846 847static int mt9v022_remove(struct i2c_client *client) 848{ 849 struct mt9v022 *mt9v022 = to_mt9v022(client); 850 struct soc_camera_link *icl = soc_camera_i2c_to_link(client); 851 852 v4l2_device_unregister_subdev(&mt9v022->subdev); 853 if (icl->free_bus) 854 icl->free_bus(icl); 855 v4l2_ctrl_handler_free(&mt9v022->hdl); 856 kfree(mt9v022); 857 858 return 0; 859} 860static const struct i2c_device_id mt9v022_id[] = { 861 { "mt9v022", 0 }, 862 { } 863}; 864MODULE_DEVICE_TABLE(i2c, mt9v022_id); 865 866static struct i2c_driver mt9v022_i2c_driver = { 867 .driver = { 868 .name = "mt9v022", 869 }, 870 .probe = mt9v022_probe, 871 .remove = mt9v022_remove, 872 .id_table = mt9v022_id, 873}; 874 875module_i2c_driver(mt9v022_i2c_driver); 876 877MODULE_DESCRIPTION("Micron MT9V022 Camera driver"); 878MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); 879MODULE_LICENSE("GPL"); 880