mt9t031.c revision 9aea470b399d797e88be08985c489855759c6c60
1/* 2 * Driver for MT9T031 CMOS Image Sensor from Micron 3 * 4 * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.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/device.h> 12#include <linux/i2c.h> 13#include <linux/log2.h> 14#include <linux/pm.h> 15#include <linux/slab.h> 16#include <linux/v4l2-mediabus.h> 17#include <linux/videodev2.h> 18#include <linux/module.h> 19 20#include <media/soc_camera.h> 21#include <media/v4l2-clk.h> 22#include <media/v4l2-subdev.h> 23#include <media/v4l2-ctrls.h> 24 25/* 26 * ATTENTION: this driver still cannot be used outside of the soc-camera 27 * framework because of its PM implementation, using the video_device node. 28 * If hardware becomes available for testing, alternative PM approaches shall 29 * be considered and tested. 30 */ 31 32/* 33 * mt9t031 i2c address 0x5d 34 * The platform has to define struct i2c_board_info objects and link to them 35 * from struct soc_camera_host_desc 36 */ 37 38/* mt9t031 selected register addresses */ 39#define MT9T031_CHIP_VERSION 0x00 40#define MT9T031_ROW_START 0x01 41#define MT9T031_COLUMN_START 0x02 42#define MT9T031_WINDOW_HEIGHT 0x03 43#define MT9T031_WINDOW_WIDTH 0x04 44#define MT9T031_HORIZONTAL_BLANKING 0x05 45#define MT9T031_VERTICAL_BLANKING 0x06 46#define MT9T031_OUTPUT_CONTROL 0x07 47#define MT9T031_SHUTTER_WIDTH_UPPER 0x08 48#define MT9T031_SHUTTER_WIDTH 0x09 49#define MT9T031_PIXEL_CLOCK_CONTROL 0x0a 50#define MT9T031_FRAME_RESTART 0x0b 51#define MT9T031_SHUTTER_DELAY 0x0c 52#define MT9T031_RESET 0x0d 53#define MT9T031_READ_MODE_1 0x1e 54#define MT9T031_READ_MODE_2 0x20 55#define MT9T031_READ_MODE_3 0x21 56#define MT9T031_ROW_ADDRESS_MODE 0x22 57#define MT9T031_COLUMN_ADDRESS_MODE 0x23 58#define MT9T031_GLOBAL_GAIN 0x35 59#define MT9T031_CHIP_ENABLE 0xF8 60 61#define MT9T031_MAX_HEIGHT 1536 62#define MT9T031_MAX_WIDTH 2048 63#define MT9T031_MIN_HEIGHT 2 64#define MT9T031_MIN_WIDTH 18 65#define MT9T031_HORIZONTAL_BLANK 142 66#define MT9T031_VERTICAL_BLANK 25 67#define MT9T031_COLUMN_SKIP 32 68#define MT9T031_ROW_SKIP 20 69 70struct mt9t031 { 71 struct v4l2_subdev subdev; 72 struct v4l2_ctrl_handler hdl; 73 struct { 74 /* exposure/auto-exposure cluster */ 75 struct v4l2_ctrl *autoexposure; 76 struct v4l2_ctrl *exposure; 77 }; 78 struct v4l2_rect rect; /* Sensor window */ 79 struct v4l2_clk *clk; 80 u16 xskip; 81 u16 yskip; 82 unsigned int total_h; 83 unsigned short y_skip_top; /* Lines to skip at the top */ 84}; 85 86static struct mt9t031 *to_mt9t031(const struct i2c_client *client) 87{ 88 return container_of(i2c_get_clientdata(client), struct mt9t031, subdev); 89} 90 91static int reg_read(struct i2c_client *client, const u8 reg) 92{ 93 return i2c_smbus_read_word_swapped(client, reg); 94} 95 96static int reg_write(struct i2c_client *client, const u8 reg, 97 const u16 data) 98{ 99 return i2c_smbus_write_word_swapped(client, reg, data); 100} 101 102static int reg_set(struct i2c_client *client, const u8 reg, 103 const u16 data) 104{ 105 int ret; 106 107 ret = reg_read(client, reg); 108 if (ret < 0) 109 return ret; 110 return reg_write(client, reg, ret | data); 111} 112 113static int reg_clear(struct i2c_client *client, const u8 reg, 114 const u16 data) 115{ 116 int ret; 117 118 ret = reg_read(client, reg); 119 if (ret < 0) 120 return ret; 121 return reg_write(client, reg, ret & ~data); 122} 123 124static int set_shutter(struct i2c_client *client, const u32 data) 125{ 126 int ret; 127 128 ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16); 129 130 if (ret >= 0) 131 ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff); 132 133 return ret; 134} 135 136static int get_shutter(struct i2c_client *client, u32 *data) 137{ 138 int ret; 139 140 ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER); 141 *data = ret << 16; 142 143 if (ret >= 0) 144 ret = reg_read(client, MT9T031_SHUTTER_WIDTH); 145 *data |= ret & 0xffff; 146 147 return ret < 0 ? ret : 0; 148} 149 150static int mt9t031_idle(struct i2c_client *client) 151{ 152 int ret; 153 154 /* Disable chip output, synchronous option update */ 155 ret = reg_write(client, MT9T031_RESET, 1); 156 if (ret >= 0) 157 ret = reg_write(client, MT9T031_RESET, 0); 158 if (ret >= 0) 159 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); 160 161 return ret >= 0 ? 0 : -EIO; 162} 163 164static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable) 165{ 166 struct i2c_client *client = v4l2_get_subdevdata(sd); 167 int ret; 168 169 if (enable) 170 /* Switch to master "normal" mode */ 171 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2); 172 else 173 /* Stop sensor readout */ 174 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2); 175 176 if (ret < 0) 177 return -EIO; 178 179 return 0; 180} 181 182/* target must be _even_ */ 183static u16 mt9t031_skip(s32 *source, s32 target, s32 max) 184{ 185 unsigned int skip; 186 187 if (*source < target + target / 2) { 188 *source = target; 189 return 1; 190 } 191 192 skip = min(max, *source + target / 2) / target; 193 if (skip > 8) 194 skip = 8; 195 *source = target * skip; 196 197 return skip; 198} 199 200/* rect is the sensor rectangle, the caller guarantees parameter validity */ 201static int mt9t031_set_params(struct i2c_client *client, 202 struct v4l2_rect *rect, u16 xskip, u16 yskip) 203{ 204 struct mt9t031 *mt9t031 = to_mt9t031(client); 205 int ret; 206 u16 xbin, ybin; 207 const u16 hblank = MT9T031_HORIZONTAL_BLANK, 208 vblank = MT9T031_VERTICAL_BLANK; 209 210 xbin = min(xskip, (u16)3); 211 ybin = min(yskip, (u16)3); 212 213 /* 214 * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper. 215 * There is always a valid suitably aligned value. The worst case is 216 * xbin = 3, width = 2048. Then we will start at 36, the last read out 217 * pixel will be 2083, which is < 2085 - first black pixel. 218 * 219 * MT9T031 datasheet imposes window left border alignment, depending on 220 * the selected xskip. Failing to conform to this requirement produces 221 * dark horizontal stripes in the image. However, even obeying to this 222 * requirement doesn't eliminate the stripes in all configurations. They 223 * appear "locally reproducibly," but can differ between tests under 224 * different lighting conditions. 225 */ 226 switch (xbin) { 227 case 1: 228 rect->left &= ~1; 229 break; 230 case 2: 231 rect->left &= ~3; 232 break; 233 case 3: 234 rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ? 235 (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6); 236 } 237 238 rect->top &= ~1; 239 240 dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n", 241 xskip, yskip, rect->width, rect->height, rect->left, rect->top); 242 243 /* Disable register update, reconfigure atomically */ 244 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1); 245 if (ret < 0) 246 return ret; 247 248 /* Blanking and start values - default... */ 249 ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank); 250 if (ret >= 0) 251 ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank); 252 253 if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) { 254 /* Binning, skipping */ 255 if (ret >= 0) 256 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, 257 ((xbin - 1) << 4) | (xskip - 1)); 258 if (ret >= 0) 259 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, 260 ((ybin - 1) << 4) | (yskip - 1)); 261 } 262 dev_dbg(&client->dev, "new physical left %u, top %u\n", 263 rect->left, rect->top); 264 265 /* 266 * The caller provides a supported format, as guaranteed by 267 * .try_mbus_fmt(), soc_camera_s_crop() and soc_camera_cropcap() 268 */ 269 if (ret >= 0) 270 ret = reg_write(client, MT9T031_COLUMN_START, rect->left); 271 if (ret >= 0) 272 ret = reg_write(client, MT9T031_ROW_START, rect->top); 273 if (ret >= 0) 274 ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1); 275 if (ret >= 0) 276 ret = reg_write(client, MT9T031_WINDOW_HEIGHT, 277 rect->height + mt9t031->y_skip_top - 1); 278 if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) { 279 mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank; 280 281 ret = set_shutter(client, mt9t031->total_h); 282 } 283 284 /* Re-enable register update, commit all changes */ 285 if (ret >= 0) 286 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1); 287 288 if (ret >= 0) { 289 mt9t031->rect = *rect; 290 mt9t031->xskip = xskip; 291 mt9t031->yskip = yskip; 292 } 293 294 return ret < 0 ? ret : 0; 295} 296 297static int mt9t031_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a) 298{ 299 struct v4l2_rect rect = a->c; 300 struct i2c_client *client = v4l2_get_subdevdata(sd); 301 struct mt9t031 *mt9t031 = to_mt9t031(client); 302 303 rect.width = ALIGN(rect.width, 2); 304 rect.height = ALIGN(rect.height, 2); 305 306 soc_camera_limit_side(&rect.left, &rect.width, 307 MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH); 308 309 soc_camera_limit_side(&rect.top, &rect.height, 310 MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT); 311 312 return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip); 313} 314 315static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) 316{ 317 struct i2c_client *client = v4l2_get_subdevdata(sd); 318 struct mt9t031 *mt9t031 = to_mt9t031(client); 319 320 a->c = mt9t031->rect; 321 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 322 323 return 0; 324} 325 326static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) 327{ 328 a->bounds.left = MT9T031_COLUMN_SKIP; 329 a->bounds.top = MT9T031_ROW_SKIP; 330 a->bounds.width = MT9T031_MAX_WIDTH; 331 a->bounds.height = MT9T031_MAX_HEIGHT; 332 a->defrect = a->bounds; 333 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 334 a->pixelaspect.numerator = 1; 335 a->pixelaspect.denominator = 1; 336 337 return 0; 338} 339 340static int mt9t031_g_fmt(struct v4l2_subdev *sd, 341 struct v4l2_mbus_framefmt *mf) 342{ 343 struct i2c_client *client = v4l2_get_subdevdata(sd); 344 struct mt9t031 *mt9t031 = to_mt9t031(client); 345 346 mf->width = mt9t031->rect.width / mt9t031->xskip; 347 mf->height = mt9t031->rect.height / mt9t031->yskip; 348 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; 349 mf->colorspace = V4L2_COLORSPACE_SRGB; 350 mf->field = V4L2_FIELD_NONE; 351 352 return 0; 353} 354 355static int mt9t031_s_fmt(struct v4l2_subdev *sd, 356 struct v4l2_mbus_framefmt *mf) 357{ 358 struct i2c_client *client = v4l2_get_subdevdata(sd); 359 struct mt9t031 *mt9t031 = to_mt9t031(client); 360 u16 xskip, yskip; 361 struct v4l2_rect rect = mt9t031->rect; 362 363 /* 364 * try_fmt has put width and height within limits. 365 * S_FMT: use binning and skipping for scaling 366 */ 367 xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH); 368 yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT); 369 370 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; 371 mf->colorspace = V4L2_COLORSPACE_SRGB; 372 373 /* mt9t031_set_params() doesn't change width and height */ 374 return mt9t031_set_params(client, &rect, xskip, yskip); 375} 376 377/* 378 * If a user window larger than sensor window is requested, we'll increase the 379 * sensor window. 380 */ 381static int mt9t031_try_fmt(struct v4l2_subdev *sd, 382 struct v4l2_mbus_framefmt *mf) 383{ 384 v4l_bound_align_image( 385 &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1, 386 &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0); 387 388 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10; 389 mf->colorspace = V4L2_COLORSPACE_SRGB; 390 391 return 0; 392} 393 394#ifdef CONFIG_VIDEO_ADV_DEBUG 395static int mt9t031_g_register(struct v4l2_subdev *sd, 396 struct v4l2_dbg_register *reg) 397{ 398 struct i2c_client *client = v4l2_get_subdevdata(sd); 399 400 if (reg->reg > 0xff) 401 return -EINVAL; 402 403 reg->size = 1; 404 reg->val = reg_read(client, reg->reg); 405 406 if (reg->val > 0xffff) 407 return -EIO; 408 409 return 0; 410} 411 412static int mt9t031_s_register(struct v4l2_subdev *sd, 413 const struct v4l2_dbg_register *reg) 414{ 415 struct i2c_client *client = v4l2_get_subdevdata(sd); 416 417 if (reg->reg > 0xff) 418 return -EINVAL; 419 420 if (reg_write(client, reg->reg, reg->val) < 0) 421 return -EIO; 422 423 return 0; 424} 425#endif 426 427static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 428{ 429 struct mt9t031 *mt9t031 = container_of(ctrl->handler, 430 struct mt9t031, hdl); 431 const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK; 432 s32 min, max; 433 434 switch (ctrl->id) { 435 case V4L2_CID_EXPOSURE_AUTO: 436 min = mt9t031->exposure->minimum; 437 max = mt9t031->exposure->maximum; 438 mt9t031->exposure->val = 439 (shutter_max / 2 + (mt9t031->total_h - 1) * (max - min)) 440 / shutter_max + min; 441 break; 442 } 443 return 0; 444} 445 446static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl) 447{ 448 struct mt9t031 *mt9t031 = container_of(ctrl->handler, 449 struct mt9t031, hdl); 450 struct v4l2_subdev *sd = &mt9t031->subdev; 451 struct i2c_client *client = v4l2_get_subdevdata(sd); 452 struct v4l2_ctrl *exp = mt9t031->exposure; 453 int data; 454 455 switch (ctrl->id) { 456 case V4L2_CID_VFLIP: 457 if (ctrl->val) 458 data = reg_set(client, MT9T031_READ_MODE_2, 0x8000); 459 else 460 data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000); 461 if (data < 0) 462 return -EIO; 463 return 0; 464 case V4L2_CID_HFLIP: 465 if (ctrl->val) 466 data = reg_set(client, MT9T031_READ_MODE_2, 0x4000); 467 else 468 data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000); 469 if (data < 0) 470 return -EIO; 471 return 0; 472 case V4L2_CID_GAIN: 473 /* See Datasheet Table 7, Gain settings. */ 474 if (ctrl->val <= ctrl->default_value) { 475 /* Pack it into 0..1 step 0.125, register values 0..8 */ 476 unsigned long range = ctrl->default_value - ctrl->minimum; 477 data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range; 478 479 dev_dbg(&client->dev, "Setting gain %d\n", data); 480 data = reg_write(client, MT9T031_GLOBAL_GAIN, data); 481 if (data < 0) 482 return -EIO; 483 } else { 484 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */ 485 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ 486 unsigned long range = ctrl->maximum - ctrl->default_value - 1; 487 /* calculated gain: map 65..127 to 9..1024 step 0.125 */ 488 unsigned long gain = ((ctrl->val - ctrl->default_value - 1) * 489 1015 + range / 2) / range + 9; 490 491 if (gain <= 32) /* calculated gain 9..32 -> 9..32 */ 492 data = gain; 493 else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */ 494 data = ((gain - 32) * 16 + 16) / 32 + 80; 495 else 496 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */ 497 data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60; 498 499 dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n", 500 reg_read(client, MT9T031_GLOBAL_GAIN), data); 501 data = reg_write(client, MT9T031_GLOBAL_GAIN, data); 502 if (data < 0) 503 return -EIO; 504 } 505 return 0; 506 507 case V4L2_CID_EXPOSURE_AUTO: 508 if (ctrl->val == V4L2_EXPOSURE_MANUAL) { 509 unsigned int range = exp->maximum - exp->minimum; 510 unsigned int shutter = ((exp->val - exp->minimum) * 1048 + 511 range / 2) / range + 1; 512 u32 old; 513 514 get_shutter(client, &old); 515 dev_dbg(&client->dev, "Set shutter from %u to %u\n", 516 old, shutter); 517 if (set_shutter(client, shutter) < 0) 518 return -EIO; 519 } else { 520 const u16 vblank = MT9T031_VERTICAL_BLANK; 521 mt9t031->total_h = mt9t031->rect.height + 522 mt9t031->y_skip_top + vblank; 523 524 if (set_shutter(client, mt9t031->total_h) < 0) 525 return -EIO; 526 } 527 return 0; 528 default: 529 return -EINVAL; 530 } 531 return 0; 532} 533 534/* 535 * Power Management: 536 * This function does nothing for now but must be present for pm to work 537 */ 538static int mt9t031_runtime_suspend(struct device *dev) 539{ 540 return 0; 541} 542 543/* 544 * Power Management: 545 * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged 546 * they are however changed at reset if the platform hook is present 547 * thus we rewrite them with the values stored by the driver 548 */ 549static int mt9t031_runtime_resume(struct device *dev) 550{ 551 struct video_device *vdev = to_video_device(dev); 552 struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev); 553 struct i2c_client *client = v4l2_get_subdevdata(sd); 554 struct mt9t031 *mt9t031 = to_mt9t031(client); 555 556 int ret; 557 u16 xbin, ybin; 558 559 xbin = min(mt9t031->xskip, (u16)3); 560 ybin = min(mt9t031->yskip, (u16)3); 561 562 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE, 563 ((xbin - 1) << 4) | (mt9t031->xskip - 1)); 564 if (ret < 0) 565 return ret; 566 567 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE, 568 ((ybin - 1) << 4) | (mt9t031->yskip - 1)); 569 if (ret < 0) 570 return ret; 571 572 return 0; 573} 574 575static const struct dev_pm_ops mt9t031_dev_pm_ops = { 576 .runtime_suspend = mt9t031_runtime_suspend, 577 .runtime_resume = mt9t031_runtime_resume, 578}; 579 580static struct device_type mt9t031_dev_type = { 581 .name = "MT9T031", 582 .pm = &mt9t031_dev_pm_ops, 583}; 584 585static int mt9t031_s_power(struct v4l2_subdev *sd, int on) 586{ 587 struct i2c_client *client = v4l2_get_subdevdata(sd); 588 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); 589 struct video_device *vdev = soc_camera_i2c_to_vdev(client); 590 struct mt9t031 *mt9t031 = to_mt9t031(client); 591 int ret; 592 593 if (on) { 594 ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk); 595 if (ret < 0) 596 return ret; 597 vdev->dev.type = &mt9t031_dev_type; 598 } else { 599 vdev->dev.type = NULL; 600 soc_camera_power_off(&client->dev, ssdd, mt9t031->clk); 601 } 602 603 return 0; 604} 605 606/* 607 * Interface active, can use i2c. If it fails, it can indeed mean, that 608 * this wasn't our capture interface, so, we wait for the right one 609 */ 610static int mt9t031_video_probe(struct i2c_client *client) 611{ 612 struct mt9t031 *mt9t031 = to_mt9t031(client); 613 s32 data; 614 int ret; 615 616 ret = mt9t031_s_power(&mt9t031->subdev, 1); 617 if (ret < 0) 618 return ret; 619 620 ret = mt9t031_idle(client); 621 if (ret < 0) { 622 dev_err(&client->dev, "Failed to initialise the camera\n"); 623 goto done; 624 } 625 626 /* Read out the chip version register */ 627 data = reg_read(client, MT9T031_CHIP_VERSION); 628 629 switch (data) { 630 case 0x1621: 631 break; 632 default: 633 dev_err(&client->dev, 634 "No MT9T031 chip detected, register read %x\n", data); 635 ret = -ENODEV; 636 goto done; 637 } 638 639 dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data); 640 641 ret = v4l2_ctrl_handler_setup(&mt9t031->hdl); 642 643done: 644 mt9t031_s_power(&mt9t031->subdev, 0); 645 646 return ret; 647} 648 649static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) 650{ 651 struct i2c_client *client = v4l2_get_subdevdata(sd); 652 struct mt9t031 *mt9t031 = to_mt9t031(client); 653 654 *lines = mt9t031->y_skip_top; 655 656 return 0; 657} 658 659static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = { 660 .g_volatile_ctrl = mt9t031_g_volatile_ctrl, 661 .s_ctrl = mt9t031_s_ctrl, 662}; 663 664static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = { 665 .s_power = mt9t031_s_power, 666#ifdef CONFIG_VIDEO_ADV_DEBUG 667 .g_register = mt9t031_g_register, 668 .s_register = mt9t031_s_register, 669#endif 670}; 671 672static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index, 673 enum v4l2_mbus_pixelcode *code) 674{ 675 if (index) 676 return -EINVAL; 677 678 *code = V4L2_MBUS_FMT_SBGGR10_1X10; 679 return 0; 680} 681 682static int mt9t031_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_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); 687 688 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING | 689 V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH | 690 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH; 691 cfg->type = V4L2_MBUS_PARALLEL; 692 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg); 693 694 return 0; 695} 696 697static int mt9t031_s_mbus_config(struct v4l2_subdev *sd, 698 const struct v4l2_mbus_config *cfg) 699{ 700 struct i2c_client *client = v4l2_get_subdevdata(sd); 701 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); 702 703 if (soc_camera_apply_board_flags(ssdd, cfg) & 704 V4L2_MBUS_PCLK_SAMPLE_FALLING) 705 return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); 706 else 707 return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000); 708} 709 710static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = { 711 .s_stream = mt9t031_s_stream, 712 .s_mbus_fmt = mt9t031_s_fmt, 713 .g_mbus_fmt = mt9t031_g_fmt, 714 .try_mbus_fmt = mt9t031_try_fmt, 715 .s_crop = mt9t031_s_crop, 716 .g_crop = mt9t031_g_crop, 717 .cropcap = mt9t031_cropcap, 718 .enum_mbus_fmt = mt9t031_enum_fmt, 719 .g_mbus_config = mt9t031_g_mbus_config, 720 .s_mbus_config = mt9t031_s_mbus_config, 721}; 722 723static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = { 724 .g_skip_top_lines = mt9t031_g_skip_top_lines, 725}; 726 727static struct v4l2_subdev_ops mt9t031_subdev_ops = { 728 .core = &mt9t031_subdev_core_ops, 729 .video = &mt9t031_subdev_video_ops, 730 .sensor = &mt9t031_subdev_sensor_ops, 731}; 732 733static int mt9t031_probe(struct i2c_client *client, 734 const struct i2c_device_id *did) 735{ 736 struct mt9t031 *mt9t031; 737 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client); 738 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); 739 int ret; 740 741 if (!ssdd) { 742 dev_err(&client->dev, "MT9T031 driver needs platform data\n"); 743 return -EINVAL; 744 } 745 746 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) { 747 dev_warn(&adapter->dev, 748 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); 749 return -EIO; 750 } 751 752 mt9t031 = devm_kzalloc(&client->dev, sizeof(struct mt9t031), GFP_KERNEL); 753 if (!mt9t031) 754 return -ENOMEM; 755 756 v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops); 757 v4l2_ctrl_handler_init(&mt9t031->hdl, 5); 758 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, 759 V4L2_CID_VFLIP, 0, 1, 1, 0); 760 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, 761 V4L2_CID_HFLIP, 0, 1, 1, 0); 762 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, 763 V4L2_CID_GAIN, 0, 127, 1, 64); 764 765 /* 766 * Simulated autoexposure. If enabled, we calculate shutter width 767 * ourselves in the driver based on vertical blanking and frame width 768 */ 769 mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl, 770 &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, 771 V4L2_EXPOSURE_AUTO); 772 mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops, 773 V4L2_CID_EXPOSURE, 1, 255, 1, 255); 774 775 mt9t031->subdev.ctrl_handler = &mt9t031->hdl; 776 if (mt9t031->hdl.error) 777 return mt9t031->hdl.error; 778 779 v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure, 780 V4L2_EXPOSURE_MANUAL, true); 781 782 mt9t031->y_skip_top = 0; 783 mt9t031->rect.left = MT9T031_COLUMN_SKIP; 784 mt9t031->rect.top = MT9T031_ROW_SKIP; 785 mt9t031->rect.width = MT9T031_MAX_WIDTH; 786 mt9t031->rect.height = MT9T031_MAX_HEIGHT; 787 788 mt9t031->xskip = 1; 789 mt9t031->yskip = 1; 790 791 mt9t031->clk = v4l2_clk_get(&client->dev, "mclk"); 792 if (IS_ERR(mt9t031->clk)) { 793 ret = PTR_ERR(mt9t031->clk); 794 goto eclkget; 795 } 796 797 ret = mt9t031_video_probe(client); 798 if (ret) { 799 v4l2_clk_put(mt9t031->clk); 800eclkget: 801 v4l2_ctrl_handler_free(&mt9t031->hdl); 802 } 803 804 return ret; 805} 806 807static int mt9t031_remove(struct i2c_client *client) 808{ 809 struct mt9t031 *mt9t031 = to_mt9t031(client); 810 811 v4l2_clk_put(mt9t031->clk); 812 v4l2_device_unregister_subdev(&mt9t031->subdev); 813 v4l2_ctrl_handler_free(&mt9t031->hdl); 814 815 return 0; 816} 817 818static const struct i2c_device_id mt9t031_id[] = { 819 { "mt9t031", 0 }, 820 { } 821}; 822MODULE_DEVICE_TABLE(i2c, mt9t031_id); 823 824static struct i2c_driver mt9t031_i2c_driver = { 825 .driver = { 826 .name = "mt9t031", 827 }, 828 .probe = mt9t031_probe, 829 .remove = mt9t031_remove, 830 .id_table = mt9t031_id, 831}; 832 833module_i2c_driver(mt9t031_i2c_driver); 834 835MODULE_DESCRIPTION("Micron MT9T031 Camera driver"); 836MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); 837MODULE_LICENSE("GPL v2"); 838