1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * imx274.c - IMX274 CMOS Image Sensor driver 4 * 5 * Copyright (C) 2017, Leopard Imaging, Inc. 6 * 7 * Leon Luo <leonl@leopardimaging.com> 8 * Edwin Zou <edwinz@leopardimaging.com> 9 * Luca Ceresoli <luca@lucaceresoli.net> 10 */ 11 12 #include <linux/clk.h> 13 #include <linux/delay.h> 14 #include <linux/gpio.h> 15 #include <linux/gpio/consumer.h> 16 #include <linux/i2c.h> 17 #include <linux/init.h> 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/of_gpio.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/regmap.h> 23 #include <linux/regulator/consumer.h> 24 #include <linux/slab.h> 25 #include <linux/v4l2-mediabus.h> 26 #include <linux/videodev2.h> 27 28 #include <media/v4l2-ctrls.h> 29 #include <media/v4l2-device.h> 30 #include <media/v4l2-subdev.h> 31 32 /* 33 * See "SHR, SVR Setting" in datasheet 34 */ 35 #define IMX274_DEFAULT_FRAME_LENGTH (4550) 36 #define IMX274_MAX_FRAME_LENGTH (0x000fffff) 37 38 /* 39 * See "Frame Rate Adjustment" in datasheet 40 */ 41 #define IMX274_PIXCLK_CONST1 (72000000) 42 #define IMX274_PIXCLK_CONST2 (1000000) 43 44 /* 45 * The input gain is shifted by IMX274_GAIN_SHIFT to get 46 * decimal number. The real gain is 47 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) 48 */ 49 #define IMX274_GAIN_SHIFT (8) 50 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) 51 52 /* 53 * See "Analog Gain" and "Digital Gain" in datasheet 54 * min gain is 1X 55 * max gain is calculated based on IMX274_GAIN_REG_MAX 56 */ 57 #define IMX274_GAIN_REG_MAX (1957) 58 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) 59 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ 60 / (2048 - IMX274_GAIN_REG_MAX)) 61 #define IMX274_MAX_DIGITAL_GAIN (8) 62 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) 63 #define IMX274_GAIN_CONST (2048) /* for gain formula */ 64 65 /* 66 * 1 line time in us = (HMAX / 72), minimal is 4 lines 67 */ 68 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) 69 70 #define IMX274_MAX_WIDTH (3840) 71 #define IMX274_MAX_HEIGHT (2160) 72 #define IMX274_MAX_FRAME_RATE (120) 73 #define IMX274_MIN_FRAME_RATE (5) 74 #define IMX274_DEF_FRAME_RATE (60) 75 76 /* 77 * register SHR is limited to (SVR value + 1) x VMAX value - 4 78 */ 79 #define IMX274_SHR_LIMIT_CONST (4) 80 81 /* 82 * Min and max sensor reset delay (microseconds) 83 */ 84 #define IMX274_RESET_DELAY1 (2000) 85 #define IMX274_RESET_DELAY2 (2200) 86 87 /* 88 * shift and mask constants 89 */ 90 #define IMX274_SHIFT_8_BITS (8) 91 #define IMX274_SHIFT_16_BITS (16) 92 #define IMX274_MASK_LSB_2_BITS (0x03) 93 #define IMX274_MASK_LSB_3_BITS (0x07) 94 #define IMX274_MASK_LSB_4_BITS (0x0f) 95 #define IMX274_MASK_LSB_8_BITS (0x00ff) 96 97 #define DRIVER_NAME "IMX274" 98 99 /* 100 * IMX274 register definitions 101 */ 102 #define IMX274_SHR_REG_MSB 0x300D /* SHR */ 103 #define IMX274_SHR_REG_LSB 0x300C /* SHR */ 104 #define IMX274_SVR_REG_MSB 0x300F /* SVR */ 105 #define IMX274_SVR_REG_LSB 0x300E /* SVR */ 106 #define IMX274_HTRIM_EN_REG 0x3037 107 #define IMX274_HTRIM_START_REG_LSB 0x3038 108 #define IMX274_HTRIM_START_REG_MSB 0x3039 109 #define IMX274_HTRIM_END_REG_LSB 0x303A 110 #define IMX274_HTRIM_END_REG_MSB 0x303B 111 #define IMX274_VWIDCUTEN_REG 0x30DD 112 #define IMX274_VWIDCUT_REG_LSB 0x30DE 113 #define IMX274_VWIDCUT_REG_MSB 0x30DF 114 #define IMX274_VWINPOS_REG_LSB 0x30E0 115 #define IMX274_VWINPOS_REG_MSB 0x30E1 116 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130 117 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131 118 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132 119 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133 120 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */ 121 #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */ 122 #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */ 123 #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ 124 #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ 125 #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */ 126 #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */ 127 #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */ 128 #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ 129 #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */ 130 #define IMX274_STANDBY_REG 0x3000 /* STANDBY */ 131 132 #define IMX274_TABLE_WAIT_MS 0 133 #define IMX274_TABLE_END 1 134 135 /* regulator supplies */ 136 static const char * const imx274_supply_names[] = { 137 "vddl", /* IF (1.2V) supply */ 138 "vdig", /* Digital Core (1.8V) supply */ 139 "vana", /* Analog (2.8V) supply */ 140 }; 141 142 #define IMX274_NUM_SUPPLIES ARRAY_SIZE(imx274_supply_names) 143 144 /* 145 * imx274 I2C operation related structure 146 */ 147 struct reg_8 { 148 u16 addr; 149 u8 val; 150 }; 151 152 static const struct regmap_config imx274_regmap_config = { 153 .reg_bits = 16, 154 .val_bits = 8, 155 .cache_type = REGCACHE_RBTREE, 156 }; 157 158 /* 159 * Parameters for each imx274 readout mode. 160 * 161 * These are the values to configure the sensor in one of the 162 * implemented modes. 163 * 164 * @init_regs: registers to initialize the mode 165 * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280) 166 * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720) 167 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate 168 * Adjustment (CSI-2)" in the datasheet) 169 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the 170 * datasheet) 171 * @max_fps: Maximum frames per second 172 * @nocpiop: Number of clocks per internal offset period (see "Integration Time 173 * in Each Readout Drive Mode (CSI-2)" in the datasheet) 174 */ 175 struct imx274_mode { 176 const struct reg_8 *init_regs; 177 u8 wbin_ratio; 178 u8 hbin_ratio; 179 int min_frame_len; 180 int min_SHR; 181 int max_fps; 182 int nocpiop; 183 }; 184 185 /* 186 * imx274 test pattern related structure 187 */ 188 enum { 189 TEST_PATTERN_DISABLED = 0, 190 TEST_PATTERN_ALL_000H, 191 TEST_PATTERN_ALL_FFFH, 192 TEST_PATTERN_ALL_555H, 193 TEST_PATTERN_ALL_AAAH, 194 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ 195 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ 196 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ 197 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ 198 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ 199 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ 200 TEST_PATTERN_H_COLOR_BARS, 201 TEST_PATTERN_V_COLOR_BARS, 202 }; 203 204 static const char * const tp_qmenu[] = { 205 "Disabled", 206 "All 000h Pattern", 207 "All FFFh Pattern", 208 "All 555h Pattern", 209 "All AAAh Pattern", 210 "Vertical Stripe (555h / AAAh)", 211 "Vertical Stripe (AAAh / 555h)", 212 "Vertical Stripe (000h / 555h)", 213 "Vertical Stripe (555h / 000h)", 214 "Vertical Stripe (000h / FFFh)", 215 "Vertical Stripe (FFFh / 000h)", 216 "Vertical Color Bars", 217 "Horizontal Color Bars", 218 }; 219 220 /* 221 * All-pixel scan mode (10-bit) 222 * imx274 mode1(refer to datasheet) register configuration with 223 * 3840x2160 resolution, raw10 data and mipi four lane output 224 */ 225 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { 226 {0x3004, 0x01}, 227 {0x3005, 0x01}, 228 {0x3006, 0x00}, 229 {0x3007, 0xa2}, 230 231 {0x3018, 0xA2}, /* output XVS, HVS */ 232 233 {0x306B, 0x05}, 234 {0x30E2, 0x01}, 235 236 {0x30EE, 0x01}, 237 {0x3342, 0x0A}, 238 {0x3343, 0x00}, 239 {0x3344, 0x16}, 240 {0x3345, 0x00}, 241 {0x33A6, 0x01}, 242 {0x3528, 0x0E}, 243 {0x3554, 0x1F}, 244 {0x3555, 0x01}, 245 {0x3556, 0x01}, 246 {0x3557, 0x01}, 247 {0x3558, 0x01}, 248 {0x3559, 0x00}, 249 {0x355A, 0x00}, 250 {0x35BA, 0x0E}, 251 {0x366A, 0x1B}, 252 {0x366B, 0x1A}, 253 {0x366C, 0x19}, 254 {0x366D, 0x17}, 255 {0x3A41, 0x08}, 256 257 {IMX274_TABLE_END, 0x00} 258 }; 259 260 /* 261 * Horizontal/vertical 2/2-line binning 262 * (Horizontal and vertical weightedbinning, 10-bit) 263 * imx274 mode3(refer to datasheet) register configuration with 264 * 1920x1080 resolution, raw10 data and mipi four lane output 265 */ 266 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { 267 {0x3004, 0x02}, 268 {0x3005, 0x21}, 269 {0x3006, 0x00}, 270 {0x3007, 0xb1}, 271 272 {0x3018, 0xA2}, /* output XVS, HVS */ 273 274 {0x306B, 0x05}, 275 {0x30E2, 0x02}, 276 277 {0x30EE, 0x01}, 278 {0x3342, 0x0A}, 279 {0x3343, 0x00}, 280 {0x3344, 0x1A}, 281 {0x3345, 0x00}, 282 {0x33A6, 0x01}, 283 {0x3528, 0x0E}, 284 {0x3554, 0x00}, 285 {0x3555, 0x01}, 286 {0x3556, 0x01}, 287 {0x3557, 0x01}, 288 {0x3558, 0x01}, 289 {0x3559, 0x00}, 290 {0x355A, 0x00}, 291 {0x35BA, 0x0E}, 292 {0x366A, 0x1B}, 293 {0x366B, 0x1A}, 294 {0x366C, 0x19}, 295 {0x366D, 0x17}, 296 {0x3A41, 0x08}, 297 298 {IMX274_TABLE_END, 0x00} 299 }; 300 301 /* 302 * Vertical 2/3 subsampling binning horizontal 3 binning 303 * imx274 mode5(refer to datasheet) register configuration with 304 * 1280x720 resolution, raw10 data and mipi four lane output 305 */ 306 static const struct reg_8 imx274_mode5_1280x720_raw10[] = { 307 {0x3004, 0x03}, 308 {0x3005, 0x31}, 309 {0x3006, 0x00}, 310 {0x3007, 0xa9}, 311 312 {0x3018, 0xA2}, /* output XVS, HVS */ 313 314 {0x306B, 0x05}, 315 {0x30E2, 0x03}, 316 317 {0x30EE, 0x01}, 318 {0x3342, 0x0A}, 319 {0x3343, 0x00}, 320 {0x3344, 0x1B}, 321 {0x3345, 0x00}, 322 {0x33A6, 0x01}, 323 {0x3528, 0x0E}, 324 {0x3554, 0x00}, 325 {0x3555, 0x01}, 326 {0x3556, 0x01}, 327 {0x3557, 0x01}, 328 {0x3558, 0x01}, 329 {0x3559, 0x00}, 330 {0x355A, 0x00}, 331 {0x35BA, 0x0E}, 332 {0x366A, 0x1B}, 333 {0x366B, 0x19}, 334 {0x366C, 0x17}, 335 {0x366D, 0x17}, 336 {0x3A41, 0x04}, 337 338 {IMX274_TABLE_END, 0x00} 339 }; 340 341 /* 342 * Vertical 2/8 subsampling horizontal 3 binning 343 * imx274 mode6(refer to datasheet) register configuration with 344 * 1280x540 resolution, raw10 data and mipi four lane output 345 */ 346 static const struct reg_8 imx274_mode6_1280x540_raw10[] = { 347 {0x3004, 0x04}, /* mode setting */ 348 {0x3005, 0x31}, 349 {0x3006, 0x00}, 350 {0x3007, 0x02}, /* mode setting */ 351 352 {0x3018, 0xA2}, /* output XVS, HVS */ 353 354 {0x306B, 0x05}, 355 {0x30E2, 0x04}, /* mode setting */ 356 357 {0x30EE, 0x01}, 358 {0x3342, 0x0A}, 359 {0x3343, 0x00}, 360 {0x3344, 0x16}, 361 {0x3345, 0x00}, 362 {0x33A6, 0x01}, 363 {0x3528, 0x0E}, 364 {0x3554, 0x1F}, 365 {0x3555, 0x01}, 366 {0x3556, 0x01}, 367 {0x3557, 0x01}, 368 {0x3558, 0x01}, 369 {0x3559, 0x00}, 370 {0x355A, 0x00}, 371 {0x35BA, 0x0E}, 372 {0x366A, 0x1B}, 373 {0x366B, 0x1A}, 374 {0x366C, 0x19}, 375 {0x366D, 0x17}, 376 {0x3A41, 0x04}, 377 378 {IMX274_TABLE_END, 0x00} 379 }; 380 381 /* 382 * imx274 first step register configuration for 383 * starting stream 384 */ 385 static const struct reg_8 imx274_start_1[] = { 386 {IMX274_STANDBY_REG, 0x12}, 387 388 /* PLRD: clock settings */ 389 {0x3120, 0xF0}, 390 {0x3121, 0x00}, 391 {0x3122, 0x02}, 392 {0x3129, 0x9C}, 393 {0x312A, 0x02}, 394 {0x312D, 0x02}, 395 396 {0x310B, 0x00}, 397 398 /* PLSTMG */ 399 {0x304C, 0x00}, /* PLSTMG01 */ 400 {0x304D, 0x03}, 401 {0x331C, 0x1A}, 402 {0x331D, 0x00}, 403 {0x3502, 0x02}, 404 {0x3529, 0x0E}, 405 {0x352A, 0x0E}, 406 {0x352B, 0x0E}, 407 {0x3538, 0x0E}, 408 {0x3539, 0x0E}, 409 {0x3553, 0x00}, 410 {0x357D, 0x05}, 411 {0x357F, 0x05}, 412 {0x3581, 0x04}, 413 {0x3583, 0x76}, 414 {0x3587, 0x01}, 415 {0x35BB, 0x0E}, 416 {0x35BC, 0x0E}, 417 {0x35BD, 0x0E}, 418 {0x35BE, 0x0E}, 419 {0x35BF, 0x0E}, 420 {0x366E, 0x00}, 421 {0x366F, 0x00}, 422 {0x3670, 0x00}, 423 {0x3671, 0x00}, 424 425 /* PSMIPI */ 426 {0x3304, 0x32}, /* PSMIPI1 */ 427 {0x3305, 0x00}, 428 {0x3306, 0x32}, 429 {0x3307, 0x00}, 430 {0x3590, 0x32}, 431 {0x3591, 0x00}, 432 {0x3686, 0x32}, 433 {0x3687, 0x00}, 434 435 {IMX274_TABLE_END, 0x00} 436 }; 437 438 /* 439 * imx274 second step register configuration for 440 * starting stream 441 */ 442 static const struct reg_8 imx274_start_2[] = { 443 {IMX274_STANDBY_REG, 0x00}, 444 {0x303E, 0x02}, /* SYS_MODE = 2 */ 445 {IMX274_TABLE_END, 0x00} 446 }; 447 448 /* 449 * imx274 third step register configuration for 450 * starting stream 451 */ 452 static const struct reg_8 imx274_start_3[] = { 453 {0x30F4, 0x00}, 454 {0x3018, 0xA2}, /* XHS VHS OUTPUT */ 455 {IMX274_TABLE_END, 0x00} 456 }; 457 458 /* 459 * imx274 register configuration for stopping stream 460 */ 461 static const struct reg_8 imx274_stop[] = { 462 {IMX274_STANDBY_REG, 0x01}, 463 {IMX274_TABLE_END, 0x00} 464 }; 465 466 /* 467 * imx274 disable test pattern register configuration 468 */ 469 static const struct reg_8 imx274_tp_disabled[] = { 470 {0x303C, 0x00}, 471 {0x377F, 0x00}, 472 {0x3781, 0x00}, 473 {0x370B, 0x00}, 474 {IMX274_TABLE_END, 0x00} 475 }; 476 477 /* 478 * imx274 test pattern register configuration 479 * reg 0x303D defines the test pattern modes 480 */ 481 static const struct reg_8 imx274_tp_regs[] = { 482 {0x303C, 0x11}, 483 {0x370E, 0x01}, 484 {0x377F, 0x01}, 485 {0x3781, 0x01}, 486 {0x370B, 0x11}, 487 {IMX274_TABLE_END, 0x00} 488 }; 489 490 /* nocpiop happens to be the same number for the implemented modes */ 491 static const struct imx274_mode imx274_modes[] = { 492 { 493 /* mode 1, 4K */ 494 .wbin_ratio = 1, /* 3840 */ 495 .hbin_ratio = 1, /* 2160 */ 496 .init_regs = imx274_mode1_3840x2160_raw10, 497 .min_frame_len = 4550, 498 .min_SHR = 12, 499 .max_fps = 60, 500 .nocpiop = 112, 501 }, 502 { 503 /* mode 3, 1080p */ 504 .wbin_ratio = 2, /* 1920 */ 505 .hbin_ratio = 2, /* 1080 */ 506 .init_regs = imx274_mode3_1920x1080_raw10, 507 .min_frame_len = 2310, 508 .min_SHR = 8, 509 .max_fps = 120, 510 .nocpiop = 112, 511 }, 512 { 513 /* mode 5, 720p */ 514 .wbin_ratio = 3, /* 1280 */ 515 .hbin_ratio = 3, /* 720 */ 516 .init_regs = imx274_mode5_1280x720_raw10, 517 .min_frame_len = 2310, 518 .min_SHR = 8, 519 .max_fps = 120, 520 .nocpiop = 112, 521 }, 522 { 523 /* mode 6, 540p */ 524 .wbin_ratio = 3, /* 1280 */ 525 .hbin_ratio = 4, /* 540 */ 526 .init_regs = imx274_mode6_1280x540_raw10, 527 .min_frame_len = 2310, 528 .min_SHR = 4, 529 .max_fps = 120, 530 .nocpiop = 112, 531 }, 532 }; 533 534 /* 535 * struct imx274_ctrls - imx274 ctrl structure 536 * @handler: V4L2 ctrl handler structure 537 * @exposure: Pointer to expsure ctrl structure 538 * @gain: Pointer to gain ctrl structure 539 * @vflip: Pointer to vflip ctrl structure 540 * @test_pattern: Pointer to test pattern ctrl structure 541 */ 542 struct imx274_ctrls { 543 struct v4l2_ctrl_handler handler; 544 struct v4l2_ctrl *exposure; 545 struct v4l2_ctrl *gain; 546 struct v4l2_ctrl *vflip; 547 struct v4l2_ctrl *test_pattern; 548 }; 549 550 /* 551 * struct stim274 - imx274 device structure 552 * @sd: V4L2 subdevice structure 553 * @pad: Media pad structure 554 * @client: Pointer to I2C client 555 * @ctrls: imx274 control structure 556 * @crop: rect to be captured 557 * @compose: compose rect, i.e. output resolution 558 * @format: V4L2 media bus frame format structure 559 * (width and height are in sync with the compose rect) 560 * @frame_rate: V4L2 frame rate structure 561 * @regmap: Pointer to regmap structure 562 * @reset_gpio: Pointer to reset gpio 563 * @supplies: List of analog and digital supply regulators 564 * @inck: Pointer to sensor input clock 565 * @lock: Mutex structure 566 * @mode: Parameters for the selected readout mode 567 */ 568 struct stimx274 { 569 struct v4l2_subdev sd; 570 struct media_pad pad; 571 struct i2c_client *client; 572 struct imx274_ctrls ctrls; 573 struct v4l2_rect crop; 574 struct v4l2_mbus_framefmt format; 575 struct v4l2_fract frame_interval; 576 struct regmap *regmap; 577 struct gpio_desc *reset_gpio; 578 struct regulator_bulk_data supplies[IMX274_NUM_SUPPLIES]; 579 struct clk *inck; 580 struct mutex lock; /* mutex lock for operations */ 581 const struct imx274_mode *mode; 582 }; 583 584 #define IMX274_ROUND(dim, step, flags) \ 585 ((flags) & V4L2_SEL_FLAG_GE \ 586 ? roundup((dim), (step)) \ 587 : ((flags) & V4L2_SEL_FLAG_LE \ 588 ? rounddown((dim), (step)) \ 589 : rounddown((dim) + (step) / 2, (step)))) 590 591 /* 592 * Function declaration 593 */ 594 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); 595 static int imx274_set_exposure(struct stimx274 *priv, int val); 596 static int imx274_set_vflip(struct stimx274 *priv, int val); 597 static int imx274_set_test_pattern(struct stimx274 *priv, int val); 598 static int imx274_set_frame_interval(struct stimx274 *priv, 599 struct v4l2_fract frame_interval); 600 601 static inline void msleep_range(unsigned int delay_base) 602 { 603 usleep_range(delay_base * 1000, delay_base * 1000 + 500); 604 } 605 606 /* 607 * v4l2_ctrl and v4l2_subdev related operations 608 */ 609 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 610 { 611 return &container_of(ctrl->handler, 612 struct stimx274, ctrls.handler)->sd; 613 } 614 615 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) 616 { 617 return container_of(sd, struct stimx274, sd); 618 } 619 620 /* 621 * Writing a register table 622 * 623 * @priv: Pointer to device 624 * @table: Table containing register values (with optional delays) 625 * 626 * This is used to write register table into sensor's reg map. 627 * 628 * Return: 0 on success, errors otherwise 629 */ 630 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) 631 { 632 struct regmap *regmap = priv->regmap; 633 int err = 0; 634 const struct reg_8 *next; 635 u8 val; 636 637 int range_start = -1; 638 int range_count = 0; 639 u8 range_vals[16]; 640 int max_range_vals = ARRAY_SIZE(range_vals); 641 642 for (next = table;; next++) { 643 if ((next->addr != range_start + range_count) || 644 (next->addr == IMX274_TABLE_END) || 645 (next->addr == IMX274_TABLE_WAIT_MS) || 646 (range_count == max_range_vals)) { 647 if (range_count == 1) 648 err = regmap_write(regmap, 649 range_start, range_vals[0]); 650 else if (range_count > 1) 651 err = regmap_bulk_write(regmap, range_start, 652 &range_vals[0], 653 range_count); 654 else 655 err = 0; 656 657 if (err) 658 return err; 659 660 range_start = -1; 661 range_count = 0; 662 663 /* Handle special address values */ 664 if (next->addr == IMX274_TABLE_END) 665 break; 666 667 if (next->addr == IMX274_TABLE_WAIT_MS) { 668 msleep_range(next->val); 669 continue; 670 } 671 } 672 673 val = next->val; 674 675 if (range_start == -1) 676 range_start = next->addr; 677 678 range_vals[range_count++] = val; 679 } 680 return 0; 681 } 682 683 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) 684 { 685 int err; 686 687 err = regmap_write(priv->regmap, addr, val); 688 if (err) 689 dev_err(&priv->client->dev, 690 "%s : i2c write failed, %x = %x\n", __func__, 691 addr, val); 692 else 693 dev_dbg(&priv->client->dev, 694 "%s : addr 0x%x, val=0x%x\n", __func__, 695 addr, val); 696 return err; 697 } 698 699 /** 700 * Read a multibyte register. 701 * 702 * Uses a bulk read where possible. 703 * 704 * @priv: Pointer to device structure 705 * @addr: Address of the LSB register. Other registers must be 706 * consecutive, least-to-most significant. 707 * @val: Pointer to store the register value (cpu endianness) 708 * @nbytes: Number of bytes to read (range: [1..3]). 709 * Other bytes are zet to 0. 710 * 711 * Return: 0 on success, errors otherwise 712 */ 713 static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val, 714 size_t nbytes) 715 { 716 __le32 val_le = 0; 717 int err; 718 719 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes); 720 if (err) { 721 dev_err(&priv->client->dev, 722 "%s : i2c bulk read failed, %x (%zu bytes)\n", 723 __func__, addr, nbytes); 724 } else { 725 *val = le32_to_cpu(val_le); 726 dev_dbg(&priv->client->dev, 727 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 728 __func__, addr, *val, nbytes); 729 } 730 731 return err; 732 } 733 734 /** 735 * Write a multibyte register. 736 * 737 * Uses a bulk write where possible. 738 * 739 * @priv: Pointer to device structure 740 * @addr: Address of the LSB register. Other registers must be 741 * consecutive, least-to-most significant. 742 * @val: Value to be written to the register (cpu endianness) 743 * @nbytes: Number of bytes to write (range: [1..3]) 744 */ 745 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, 746 size_t nbytes) 747 { 748 __le32 val_le = cpu_to_le32(val); 749 int err; 750 751 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); 752 if (err) 753 dev_err(&priv->client->dev, 754 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", 755 __func__, addr, val, nbytes); 756 else 757 dev_dbg(&priv->client->dev, 758 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 759 __func__, addr, val, nbytes); 760 return err; 761 } 762 763 /* 764 * Set mode registers to start stream. 765 * @priv: Pointer to device structure 766 * 767 * Return: 0 on success, errors otherwise 768 */ 769 static int imx274_mode_regs(struct stimx274 *priv) 770 { 771 int err = 0; 772 773 err = imx274_write_table(priv, imx274_start_1); 774 if (err) 775 return err; 776 777 err = imx274_write_table(priv, priv->mode->init_regs); 778 779 return err; 780 } 781 782 /* 783 * imx274_start_stream - Function for starting stream per mode index 784 * @priv: Pointer to device structure 785 * 786 * Return: 0 on success, errors otherwise 787 */ 788 static int imx274_start_stream(struct stimx274 *priv) 789 { 790 int err = 0; 791 792 err = __v4l2_ctrl_handler_setup(&priv->ctrls.handler); 793 if (err) { 794 dev_err(&priv->client->dev, "Error %d setup controls\n", err); 795 return err; 796 } 797 798 /* 799 * Refer to "Standby Cancel Sequence when using CSI-2" in 800 * imx274 datasheet, it should wait 10ms or more here. 801 * give it 1 extra ms for margin 802 */ 803 msleep_range(11); 804 err = imx274_write_table(priv, imx274_start_2); 805 if (err) 806 return err; 807 808 /* 809 * Refer to "Standby Cancel Sequence when using CSI-2" in 810 * imx274 datasheet, it should wait 7ms or more here. 811 * give it 1 extra ms for margin 812 */ 813 msleep_range(8); 814 err = imx274_write_table(priv, imx274_start_3); 815 if (err) 816 return err; 817 818 return 0; 819 } 820 821 /* 822 * imx274_reset - Function called to reset the sensor 823 * @priv: Pointer to device structure 824 * @rst: Input value for determining the sensor's end state after reset 825 * 826 * Set the senor in reset and then 827 * if rst = 0, keep it in reset; 828 * if rst = 1, bring it out of reset. 829 * 830 */ 831 static void imx274_reset(struct stimx274 *priv, int rst) 832 { 833 gpiod_set_value_cansleep(priv->reset_gpio, 0); 834 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 835 gpiod_set_value_cansleep(priv->reset_gpio, !!rst); 836 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 837 } 838 839 static int imx274_power_on(struct device *dev) 840 { 841 struct i2c_client *client = to_i2c_client(dev); 842 struct v4l2_subdev *sd = i2c_get_clientdata(client); 843 struct stimx274 *imx274 = to_imx274(sd); 844 int ret; 845 846 /* keep sensor in reset before power on */ 847 imx274_reset(imx274, 0); 848 849 ret = clk_prepare_enable(imx274->inck); 850 if (ret) { 851 dev_err(&imx274->client->dev, 852 "Failed to enable input clock: %d\n", ret); 853 return ret; 854 } 855 856 ret = regulator_bulk_enable(IMX274_NUM_SUPPLIES, imx274->supplies); 857 if (ret) { 858 dev_err(&imx274->client->dev, 859 "Failed to enable regulators: %d\n", ret); 860 goto fail_reg; 861 } 862 863 udelay(2); 864 imx274_reset(imx274, 1); 865 866 return 0; 867 868 fail_reg: 869 clk_disable_unprepare(imx274->inck); 870 return ret; 871 } 872 873 static int imx274_power_off(struct device *dev) 874 { 875 struct i2c_client *client = to_i2c_client(dev); 876 struct v4l2_subdev *sd = i2c_get_clientdata(client); 877 struct stimx274 *imx274 = to_imx274(sd); 878 879 imx274_reset(imx274, 0); 880 881 regulator_bulk_disable(IMX274_NUM_SUPPLIES, imx274->supplies); 882 883 clk_disable_unprepare(imx274->inck); 884 885 return 0; 886 } 887 888 static int imx274_regulators_get(struct device *dev, struct stimx274 *imx274) 889 { 890 unsigned int i; 891 892 for (i = 0; i < IMX274_NUM_SUPPLIES; i++) 893 imx274->supplies[i].supply = imx274_supply_names[i]; 894 895 return devm_regulator_bulk_get(dev, IMX274_NUM_SUPPLIES, 896 imx274->supplies); 897 } 898 899 /** 900 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls 901 * @ctrl: V4L2 control to be set 902 * 903 * This function is used to set the V4L2 controls for the imx274 sensor. 904 * 905 * Return: 0 on success, errors otherwise 906 */ 907 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) 908 { 909 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 910 struct stimx274 *imx274 = to_imx274(sd); 911 int ret = -EINVAL; 912 913 if (!pm_runtime_get_if_in_use(&imx274->client->dev)) 914 return 0; 915 916 dev_dbg(&imx274->client->dev, 917 "%s : s_ctrl: %s, value: %d\n", __func__, 918 ctrl->name, ctrl->val); 919 920 switch (ctrl->id) { 921 case V4L2_CID_EXPOSURE: 922 dev_dbg(&imx274->client->dev, 923 "%s : set V4L2_CID_EXPOSURE\n", __func__); 924 ret = imx274_set_exposure(imx274, ctrl->val); 925 break; 926 927 case V4L2_CID_GAIN: 928 dev_dbg(&imx274->client->dev, 929 "%s : set V4L2_CID_GAIN\n", __func__); 930 ret = imx274_set_gain(imx274, ctrl); 931 break; 932 933 case V4L2_CID_VFLIP: 934 dev_dbg(&imx274->client->dev, 935 "%s : set V4L2_CID_VFLIP\n", __func__); 936 ret = imx274_set_vflip(imx274, ctrl->val); 937 break; 938 939 case V4L2_CID_TEST_PATTERN: 940 dev_dbg(&imx274->client->dev, 941 "%s : set V4L2_CID_TEST_PATTERN\n", __func__); 942 ret = imx274_set_test_pattern(imx274, ctrl->val); 943 break; 944 } 945 946 pm_runtime_put(&imx274->client->dev); 947 948 return ret; 949 } 950 951 static int imx274_binning_goodness(struct stimx274 *imx274, 952 int w, int ask_w, 953 int h, int ask_h, u32 flags) 954 { 955 struct device *dev = &imx274->client->dev; 956 const int goodness = 100000; 957 int val = 0; 958 959 if (flags & V4L2_SEL_FLAG_GE) { 960 if (w < ask_w) 961 val -= goodness; 962 if (h < ask_h) 963 val -= goodness; 964 } 965 966 if (flags & V4L2_SEL_FLAG_LE) { 967 if (w > ask_w) 968 val -= goodness; 969 if (h > ask_h) 970 val -= goodness; 971 } 972 973 val -= abs(w - ask_w); 974 val -= abs(h - ask_h); 975 976 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", 977 __func__, ask_w, ask_h, w, h, val); 978 979 return val; 980 } 981 982 /** 983 * Helper function to change binning and set both compose and format. 984 * 985 * We have two entry points to change binning: set_fmt and 986 * set_selection(COMPOSE). Both have to compute the new output size 987 * and set it in both the compose rect and the frame format size. We 988 * also need to do the same things after setting cropping to restore 989 * 1:1 binning. 990 * 991 * This function contains the common code for these three cases, it 992 * has many arguments in order to accommodate the needs of all of 993 * them. 994 * 995 * Must be called with imx274->lock locked. 996 * 997 * @imx274: The device object 998 * @cfg: The pad config we are editing for TRY requests 999 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller 1000 * @width: Input-output parameter: set to the desired width before 1001 * the call, contains the chosen value after returning successfully 1002 * @height: Input-output parameter for height (see @width) 1003 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not 1004 * available (when called from set_fmt) 1005 */ 1006 static int __imx274_change_compose(struct stimx274 *imx274, 1007 struct v4l2_subdev_pad_config *cfg, 1008 u32 which, 1009 u32 *width, 1010 u32 *height, 1011 u32 flags) 1012 { 1013 struct device *dev = &imx274->client->dev; 1014 const struct v4l2_rect *cur_crop; 1015 struct v4l2_mbus_framefmt *tgt_fmt; 1016 unsigned int i; 1017 const struct imx274_mode *best_mode = &imx274_modes[0]; 1018 int best_goodness = INT_MIN; 1019 1020 if (which == V4L2_SUBDEV_FORMAT_TRY) { 1021 cur_crop = &cfg->try_crop; 1022 tgt_fmt = &cfg->try_fmt; 1023 } else { 1024 cur_crop = &imx274->crop; 1025 tgt_fmt = &imx274->format; 1026 } 1027 1028 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) { 1029 u8 wratio = imx274_modes[i].wbin_ratio; 1030 u8 hratio = imx274_modes[i].hbin_ratio; 1031 1032 int goodness = imx274_binning_goodness( 1033 imx274, 1034 cur_crop->width / wratio, *width, 1035 cur_crop->height / hratio, *height, 1036 flags); 1037 1038 if (goodness >= best_goodness) { 1039 best_goodness = goodness; 1040 best_mode = &imx274_modes[i]; 1041 } 1042 } 1043 1044 *width = cur_crop->width / best_mode->wbin_ratio; 1045 *height = cur_crop->height / best_mode->hbin_ratio; 1046 1047 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) 1048 imx274->mode = best_mode; 1049 1050 dev_dbg(dev, "%s: selected %ux%u binning\n", 1051 __func__, best_mode->wbin_ratio, best_mode->hbin_ratio); 1052 1053 tgt_fmt->width = *width; 1054 tgt_fmt->height = *height; 1055 tgt_fmt->field = V4L2_FIELD_NONE; 1056 1057 return 0; 1058 } 1059 1060 /** 1061 * imx274_get_fmt - Get the pad format 1062 * @sd: Pointer to V4L2 Sub device structure 1063 * @cfg: Pointer to sub device pad information structure 1064 * @fmt: Pointer to pad level media bus format 1065 * 1066 * This function is used to get the pad format information. 1067 * 1068 * Return: 0 on success 1069 */ 1070 static int imx274_get_fmt(struct v4l2_subdev *sd, 1071 struct v4l2_subdev_pad_config *cfg, 1072 struct v4l2_subdev_format *fmt) 1073 { 1074 struct stimx274 *imx274 = to_imx274(sd); 1075 1076 mutex_lock(&imx274->lock); 1077 fmt->format = imx274->format; 1078 mutex_unlock(&imx274->lock); 1079 return 0; 1080 } 1081 1082 /** 1083 * imx274_set_fmt - This is used to set the pad format 1084 * @sd: Pointer to V4L2 Sub device structure 1085 * @cfg: Pointer to sub device pad information structure 1086 * @format: Pointer to pad level media bus format 1087 * 1088 * This function is used to set the pad format. 1089 * 1090 * Return: 0 on success 1091 */ 1092 static int imx274_set_fmt(struct v4l2_subdev *sd, 1093 struct v4l2_subdev_pad_config *cfg, 1094 struct v4l2_subdev_format *format) 1095 { 1096 struct v4l2_mbus_framefmt *fmt = &format->format; 1097 struct stimx274 *imx274 = to_imx274(sd); 1098 int err = 0; 1099 1100 mutex_lock(&imx274->lock); 1101 1102 err = __imx274_change_compose(imx274, cfg, format->which, 1103 &fmt->width, &fmt->height, 0); 1104 1105 if (err) 1106 goto out; 1107 1108 /* 1109 * __imx274_change_compose already set width and height in the 1110 * applicable format, but we need to keep all other format 1111 * values, so do a full copy here 1112 */ 1113 fmt->field = V4L2_FIELD_NONE; 1114 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 1115 cfg->try_fmt = *fmt; 1116 else 1117 imx274->format = *fmt; 1118 1119 out: 1120 mutex_unlock(&imx274->lock); 1121 1122 return err; 1123 } 1124 1125 static int imx274_get_selection(struct v4l2_subdev *sd, 1126 struct v4l2_subdev_pad_config *cfg, 1127 struct v4l2_subdev_selection *sel) 1128 { 1129 struct stimx274 *imx274 = to_imx274(sd); 1130 const struct v4l2_rect *src_crop; 1131 const struct v4l2_mbus_framefmt *src_fmt; 1132 int ret = 0; 1133 1134 if (sel->pad != 0) 1135 return -EINVAL; 1136 1137 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { 1138 sel->r.left = 0; 1139 sel->r.top = 0; 1140 sel->r.width = IMX274_MAX_WIDTH; 1141 sel->r.height = IMX274_MAX_HEIGHT; 1142 return 0; 1143 } 1144 1145 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1146 src_crop = &cfg->try_crop; 1147 src_fmt = &cfg->try_fmt; 1148 } else { 1149 src_crop = &imx274->crop; 1150 src_fmt = &imx274->format; 1151 } 1152 1153 mutex_lock(&imx274->lock); 1154 1155 switch (sel->target) { 1156 case V4L2_SEL_TGT_CROP: 1157 sel->r = *src_crop; 1158 break; 1159 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1160 sel->r.top = 0; 1161 sel->r.left = 0; 1162 sel->r.width = src_crop->width; 1163 sel->r.height = src_crop->height; 1164 break; 1165 case V4L2_SEL_TGT_COMPOSE: 1166 sel->r.top = 0; 1167 sel->r.left = 0; 1168 sel->r.width = src_fmt->width; 1169 sel->r.height = src_fmt->height; 1170 break; 1171 default: 1172 ret = -EINVAL; 1173 } 1174 1175 mutex_unlock(&imx274->lock); 1176 1177 return ret; 1178 } 1179 1180 static int imx274_set_selection_crop(struct stimx274 *imx274, 1181 struct v4l2_subdev_pad_config *cfg, 1182 struct v4l2_subdev_selection *sel) 1183 { 1184 struct v4l2_rect *tgt_crop; 1185 struct v4l2_rect new_crop; 1186 bool size_changed; 1187 1188 /* 1189 * h_step could be 12 or 24 depending on the binning. But we 1190 * won't know the binning until we choose the mode later in 1191 * __imx274_change_compose(). Thus let's be safe and use the 1192 * most conservative value in all cases. 1193 */ 1194 const u32 h_step = 24; 1195 1196 new_crop.width = min_t(u32, 1197 IMX274_ROUND(sel->r.width, h_step, sel->flags), 1198 IMX274_MAX_WIDTH); 1199 1200 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ 1201 if (new_crop.width < 144) 1202 new_crop.width = 144; 1203 1204 new_crop.left = min_t(u32, 1205 IMX274_ROUND(sel->r.left, h_step, 0), 1206 IMX274_MAX_WIDTH - new_crop.width); 1207 1208 new_crop.height = min_t(u32, 1209 IMX274_ROUND(sel->r.height, 2, sel->flags), 1210 IMX274_MAX_HEIGHT); 1211 1212 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), 1213 IMX274_MAX_HEIGHT - new_crop.height); 1214 1215 sel->r = new_crop; 1216 1217 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1218 tgt_crop = &cfg->try_crop; 1219 else 1220 tgt_crop = &imx274->crop; 1221 1222 mutex_lock(&imx274->lock); 1223 1224 size_changed = (new_crop.width != tgt_crop->width || 1225 new_crop.height != tgt_crop->height); 1226 1227 /* __imx274_change_compose needs the new size in *tgt_crop */ 1228 *tgt_crop = new_crop; 1229 1230 /* if crop size changed then reset the output image size */ 1231 if (size_changed) 1232 __imx274_change_compose(imx274, cfg, sel->which, 1233 &new_crop.width, &new_crop.height, 1234 sel->flags); 1235 1236 mutex_unlock(&imx274->lock); 1237 1238 return 0; 1239 } 1240 1241 static int imx274_set_selection(struct v4l2_subdev *sd, 1242 struct v4l2_subdev_pad_config *cfg, 1243 struct v4l2_subdev_selection *sel) 1244 { 1245 struct stimx274 *imx274 = to_imx274(sd); 1246 1247 if (sel->pad != 0) 1248 return -EINVAL; 1249 1250 if (sel->target == V4L2_SEL_TGT_CROP) 1251 return imx274_set_selection_crop(imx274, cfg, sel); 1252 1253 if (sel->target == V4L2_SEL_TGT_COMPOSE) { 1254 int err; 1255 1256 mutex_lock(&imx274->lock); 1257 err = __imx274_change_compose(imx274, cfg, sel->which, 1258 &sel->r.width, &sel->r.height, 1259 sel->flags); 1260 mutex_unlock(&imx274->lock); 1261 1262 /* 1263 * __imx274_change_compose already set width and 1264 * height in set->r, we still need to set top-left 1265 */ 1266 if (!err) { 1267 sel->r.top = 0; 1268 sel->r.left = 0; 1269 } 1270 1271 return err; 1272 } 1273 1274 return -EINVAL; 1275 } 1276 1277 static int imx274_apply_trimming(struct stimx274 *imx274) 1278 { 1279 u32 h_start; 1280 u32 h_end; 1281 u32 hmax; 1282 u32 v_cut; 1283 s32 v_pos; 1284 u32 write_v_size; 1285 u32 y_out_size; 1286 int err; 1287 1288 h_start = imx274->crop.left + 12; 1289 h_end = h_start + imx274->crop.width; 1290 1291 /* Use the minimum allowed value of HMAX */ 1292 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ 1293 /* Note: 260 is the minimum HMAX in all implemented modes */ 1294 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); 1295 1296 /* invert v_pos if VFLIP */ 1297 v_pos = imx274->ctrls.vflip->cur.val ? 1298 (-imx274->crop.top / 2) : (imx274->crop.top / 2); 1299 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; 1300 write_v_size = imx274->crop.height + 22; 1301 y_out_size = imx274->crop.height; 1302 1303 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); 1304 if (!err) 1305 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); 1306 if (!err) 1307 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, 1308 h_start, 2); 1309 if (!err) 1310 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, 1311 h_end, 2); 1312 if (!err) 1313 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); 1314 if (!err) 1315 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, 1316 v_cut, 2); 1317 if (!err) 1318 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, 1319 v_pos, 2); 1320 if (!err) 1321 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, 1322 write_v_size, 2); 1323 if (!err) 1324 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, 1325 y_out_size, 2); 1326 1327 return err; 1328 } 1329 1330 /** 1331 * imx274_g_frame_interval - Get the frame interval 1332 * @sd: Pointer to V4L2 Sub device structure 1333 * @fi: Pointer to V4l2 Sub device frame interval structure 1334 * 1335 * This function is used to get the frame interval. 1336 * 1337 * Return: 0 on success 1338 */ 1339 static int imx274_g_frame_interval(struct v4l2_subdev *sd, 1340 struct v4l2_subdev_frame_interval *fi) 1341 { 1342 struct stimx274 *imx274 = to_imx274(sd); 1343 1344 fi->interval = imx274->frame_interval; 1345 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", 1346 __func__, imx274->frame_interval.numerator, 1347 imx274->frame_interval.denominator); 1348 1349 return 0; 1350 } 1351 1352 /** 1353 * imx274_s_frame_interval - Set the frame interval 1354 * @sd: Pointer to V4L2 Sub device structure 1355 * @fi: Pointer to V4l2 Sub device frame interval structure 1356 * 1357 * This function is used to set the frame intervavl. 1358 * 1359 * Return: 0 on success 1360 */ 1361 static int imx274_s_frame_interval(struct v4l2_subdev *sd, 1362 struct v4l2_subdev_frame_interval *fi) 1363 { 1364 struct stimx274 *imx274 = to_imx274(sd); 1365 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; 1366 int min, max, def; 1367 int ret; 1368 1369 mutex_lock(&imx274->lock); 1370 ret = imx274_set_frame_interval(imx274, fi->interval); 1371 1372 if (!ret) { 1373 fi->interval = imx274->frame_interval; 1374 1375 /* 1376 * exposure time range is decided by frame interval 1377 * need to update it after frame interval changes 1378 */ 1379 min = IMX274_MIN_EXPOSURE_TIME; 1380 max = fi->interval.numerator * 1000000 1381 / fi->interval.denominator; 1382 def = max; 1383 if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) { 1384 dev_err(&imx274->client->dev, 1385 "Exposure ctrl range update failed\n"); 1386 goto unlock; 1387 } 1388 1389 /* update exposure time accordingly */ 1390 imx274_set_exposure(imx274, ctrl->val); 1391 1392 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", 1393 fi->interval.numerator * 1000000 1394 / fi->interval.denominator); 1395 } 1396 1397 unlock: 1398 mutex_unlock(&imx274->lock); 1399 1400 return ret; 1401 } 1402 1403 /** 1404 * imx274_load_default - load default control values 1405 * @priv: Pointer to device structure 1406 * 1407 * Return: 0 on success, errors otherwise 1408 */ 1409 static void imx274_load_default(struct stimx274 *priv) 1410 { 1411 /* load default control values */ 1412 priv->frame_interval.numerator = 1; 1413 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1414 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; 1415 priv->ctrls.gain->val = IMX274_DEF_GAIN; 1416 priv->ctrls.vflip->val = 0; 1417 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; 1418 } 1419 1420 /** 1421 * imx274_s_stream - It is used to start/stop the streaming. 1422 * @sd: V4L2 Sub device 1423 * @on: Flag (True / False) 1424 * 1425 * This function controls the start or stop of streaming for the 1426 * imx274 sensor. 1427 * 1428 * Return: 0 on success, errors otherwise 1429 */ 1430 static int imx274_s_stream(struct v4l2_subdev *sd, int on) 1431 { 1432 struct stimx274 *imx274 = to_imx274(sd); 1433 int ret = 0; 1434 1435 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, 1436 on ? "Stream Start" : "Stream Stop", 1437 imx274->mode - &imx274_modes[0]); 1438 1439 mutex_lock(&imx274->lock); 1440 1441 if (on) { 1442 ret = pm_runtime_get_sync(&imx274->client->dev); 1443 if (ret < 0) { 1444 pm_runtime_put_noidle(&imx274->client->dev); 1445 mutex_unlock(&imx274->lock); 1446 return ret; 1447 } 1448 1449 /* load mode registers */ 1450 ret = imx274_mode_regs(imx274); 1451 if (ret) 1452 goto fail; 1453 1454 ret = imx274_apply_trimming(imx274); 1455 if (ret) 1456 goto fail; 1457 1458 /* 1459 * update frame rate & expsoure. if the last mode is different, 1460 * HMAX could be changed. As the result, frame rate & exposure 1461 * are changed. 1462 * gain is not affected. 1463 */ 1464 ret = imx274_set_frame_interval(imx274, 1465 imx274->frame_interval); 1466 if (ret) 1467 goto fail; 1468 1469 /* start stream */ 1470 ret = imx274_start_stream(imx274); 1471 if (ret) 1472 goto fail; 1473 } else { 1474 /* stop stream */ 1475 ret = imx274_write_table(imx274, imx274_stop); 1476 if (ret) 1477 goto fail; 1478 1479 pm_runtime_put(&imx274->client->dev); 1480 } 1481 1482 mutex_unlock(&imx274->lock); 1483 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); 1484 return 0; 1485 1486 fail: 1487 pm_runtime_put(&imx274->client->dev); 1488 mutex_unlock(&imx274->lock); 1489 dev_err(&imx274->client->dev, "s_stream failed\n"); 1490 return ret; 1491 } 1492 1493 /* 1494 * imx274_get_frame_length - Function for obtaining current frame length 1495 * @priv: Pointer to device structure 1496 * @val: Pointer to obainted value 1497 * 1498 * frame_length = vmax x (svr + 1), in unit of hmax. 1499 * 1500 * Return: 0 on success 1501 */ 1502 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) 1503 { 1504 int err; 1505 u32 svr; 1506 u32 vmax; 1507 1508 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1509 if (err) 1510 goto fail; 1511 1512 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3); 1513 if (err) 1514 goto fail; 1515 1516 *val = vmax * (svr + 1); 1517 1518 return 0; 1519 1520 fail: 1521 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1522 return err; 1523 } 1524 1525 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, 1526 u32 *frame_length) 1527 { 1528 int err; 1529 1530 err = imx274_get_frame_length(priv, frame_length); 1531 if (err) 1532 return err; 1533 1534 if (*frame_length < priv->mode->min_frame_len) 1535 *frame_length = priv->mode->min_frame_len; 1536 1537 *val = *frame_length - *val; /* convert to raw shr */ 1538 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) 1539 *val = *frame_length - IMX274_SHR_LIMIT_CONST; 1540 else if (*val < priv->mode->min_SHR) 1541 *val = priv->mode->min_SHR; 1542 1543 return 0; 1544 } 1545 1546 /* 1547 * imx274_set_digital gain - Function called when setting digital gain 1548 * @priv: Pointer to device structure 1549 * @dgain: Value of digital gain. 1550 * 1551 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x 1552 * 1553 * Return: 0 on success 1554 */ 1555 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) 1556 { 1557 u8 reg_val; 1558 1559 reg_val = ffs(dgain); 1560 1561 if (reg_val) 1562 reg_val--; 1563 1564 reg_val = clamp(reg_val, (u8)0, (u8)3); 1565 1566 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, 1567 reg_val & IMX274_MASK_LSB_4_BITS); 1568 } 1569 1570 /* 1571 * imx274_set_gain - Function called when setting gain 1572 * @priv: Pointer to device structure 1573 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; 1574 * @ctrl: v4l2 control pointer 1575 * 1576 * Set the gain based on input value. 1577 * The caller should hold the mutex lock imx274->lock if necessary 1578 * 1579 * Return: 0 on success 1580 */ 1581 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) 1582 { 1583 int err; 1584 u32 gain, analog_gain, digital_gain, gain_reg; 1585 1586 gain = (u32)(ctrl->val); 1587 1588 dev_dbg(&priv->client->dev, 1589 "%s : input gain = %d.%d\n", __func__, 1590 gain >> IMX274_GAIN_SHIFT, 1591 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); 1592 1593 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) 1594 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; 1595 else if (gain < IMX274_MIN_GAIN) 1596 gain = IMX274_MIN_GAIN; 1597 1598 if (gain <= IMX274_MAX_ANALOG_GAIN) 1599 digital_gain = 1; 1600 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) 1601 digital_gain = 2; 1602 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) 1603 digital_gain = 4; 1604 else 1605 digital_gain = IMX274_MAX_DIGITAL_GAIN; 1606 1607 analog_gain = gain / digital_gain; 1608 1609 dev_dbg(&priv->client->dev, 1610 "%s : digital gain = %d, analog gain = %d.%d\n", 1611 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, 1612 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) 1613 >> IMX274_GAIN_SHIFT); 1614 1615 err = imx274_set_digital_gain(priv, digital_gain); 1616 if (err) 1617 goto fail; 1618 1619 /* convert to register value, refer to imx274 datasheet */ 1620 gain_reg = (u32)IMX274_GAIN_CONST - 1621 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; 1622 if (gain_reg > IMX274_GAIN_REG_MAX) 1623 gain_reg = IMX274_GAIN_REG_MAX; 1624 1625 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 1626 2); 1627 if (err) 1628 goto fail; 1629 1630 if (IMX274_GAIN_CONST - gain_reg == 0) { 1631 err = -EINVAL; 1632 goto fail; 1633 } 1634 1635 /* convert register value back to gain value */ 1636 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) 1637 / (IMX274_GAIN_CONST - gain_reg) * digital_gain; 1638 1639 dev_dbg(&priv->client->dev, 1640 "%s : GAIN control success, gain_reg = %d, new gain = %d\n", 1641 __func__, gain_reg, ctrl->val); 1642 1643 return 0; 1644 1645 fail: 1646 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1647 return err; 1648 } 1649 1650 /* 1651 * imx274_set_coarse_time - Function called when setting SHR value 1652 * @priv: Pointer to device structure 1653 * @val: Value for exposure time in number of line_length, or [HMAX] 1654 * 1655 * Set SHR value based on input value. 1656 * 1657 * Return: 0 on success 1658 */ 1659 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) 1660 { 1661 int err; 1662 u32 coarse_time, frame_length; 1663 1664 coarse_time = *val; 1665 1666 /* convert exposure_time to appropriate SHR value */ 1667 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); 1668 if (err) 1669 goto fail; 1670 1671 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); 1672 if (err) 1673 goto fail; 1674 1675 *val = frame_length - coarse_time; 1676 return 0; 1677 1678 fail: 1679 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1680 return err; 1681 } 1682 1683 /* 1684 * imx274_set_exposure - Function called when setting exposure time 1685 * @priv: Pointer to device structure 1686 * @val: Variable for exposure time, in the unit of micro-second 1687 * 1688 * Set exposure time based on input value. 1689 * The caller should hold the mutex lock imx274->lock if necessary 1690 * 1691 * Return: 0 on success 1692 */ 1693 static int imx274_set_exposure(struct stimx274 *priv, int val) 1694 { 1695 int err; 1696 u32 hmax; 1697 u32 coarse_time; /* exposure time in unit of line (HMAX)*/ 1698 1699 dev_dbg(&priv->client->dev, 1700 "%s : EXPOSURE control input = %d\n", __func__, val); 1701 1702 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ 1703 1704 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1705 if (err) 1706 goto fail; 1707 1708 if (hmax == 0) { 1709 err = -EINVAL; 1710 goto fail; 1711 } 1712 1713 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val 1714 - priv->mode->nocpiop) / hmax; 1715 1716 /* step 2: convert exposure_time into SHR value */ 1717 1718 /* set SHR */ 1719 err = imx274_set_coarse_time(priv, &coarse_time); 1720 if (err) 1721 goto fail; 1722 1723 priv->ctrls.exposure->val = 1724 (coarse_time * hmax + priv->mode->nocpiop) 1725 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); 1726 1727 dev_dbg(&priv->client->dev, 1728 "%s : EXPOSURE control success\n", __func__); 1729 return 0; 1730 1731 fail: 1732 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1733 1734 return err; 1735 } 1736 1737 /* 1738 * imx274_set_vflip - Function called when setting vertical flip 1739 * @priv: Pointer to device structure 1740 * @val: Value for vflip setting 1741 * 1742 * Set vertical flip based on input value. 1743 * val = 0: normal, no vertical flip 1744 * val = 1: vertical flip enabled 1745 * The caller should hold the mutex lock imx274->lock if necessary 1746 * 1747 * Return: 0 on success 1748 */ 1749 static int imx274_set_vflip(struct stimx274 *priv, int val) 1750 { 1751 int err; 1752 1753 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); 1754 if (err) { 1755 dev_err(&priv->client->dev, "VFLIP control error\n"); 1756 return err; 1757 } 1758 1759 dev_dbg(&priv->client->dev, 1760 "%s : VFLIP control success\n", __func__); 1761 1762 return 0; 1763 } 1764 1765 /* 1766 * imx274_set_test_pattern - Function called when setting test pattern 1767 * @priv: Pointer to device structure 1768 * @val: Variable for test pattern 1769 * 1770 * Set to different test patterns based on input value. 1771 * 1772 * Return: 0 on success 1773 */ 1774 static int imx274_set_test_pattern(struct stimx274 *priv, int val) 1775 { 1776 int err = 0; 1777 1778 if (val == TEST_PATTERN_DISABLED) { 1779 err = imx274_write_table(priv, imx274_tp_disabled); 1780 } else if (val <= TEST_PATTERN_V_COLOR_BARS) { 1781 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); 1782 if (!err) 1783 err = imx274_write_table(priv, imx274_tp_regs); 1784 } else { 1785 err = -EINVAL; 1786 } 1787 1788 if (!err) 1789 dev_dbg(&priv->client->dev, 1790 "%s : TEST PATTERN control success\n", __func__); 1791 else 1792 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1793 1794 return err; 1795 } 1796 1797 /* 1798 * imx274_set_frame_length - Function called when setting frame length 1799 * @priv: Pointer to device structure 1800 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) 1801 * 1802 * Set frame length based on input value. 1803 * 1804 * Return: 0 on success 1805 */ 1806 static int imx274_set_frame_length(struct stimx274 *priv, u32 val) 1807 { 1808 int err; 1809 u32 frame_length; 1810 1811 dev_dbg(&priv->client->dev, "%s : input length = %d\n", 1812 __func__, val); 1813 1814 frame_length = (u32)val; 1815 1816 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); 1817 if (err) 1818 goto fail; 1819 1820 return 0; 1821 1822 fail: 1823 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1824 return err; 1825 } 1826 1827 /* 1828 * imx274_set_frame_interval - Function called when setting frame interval 1829 * @priv: Pointer to device structure 1830 * @frame_interval: Variable for frame interval 1831 * 1832 * Change frame interval by updating VMAX value 1833 * The caller should hold the mutex lock imx274->lock if necessary 1834 * 1835 * Return: 0 on success 1836 */ 1837 static int imx274_set_frame_interval(struct stimx274 *priv, 1838 struct v4l2_fract frame_interval) 1839 { 1840 int err; 1841 u32 frame_length, req_frame_rate; 1842 u32 svr; 1843 u32 hmax; 1844 1845 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", 1846 __func__, frame_interval.numerator, 1847 frame_interval.denominator); 1848 1849 if (frame_interval.numerator == 0 || frame_interval.denominator == 0) { 1850 frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1851 frame_interval.numerator = 1; 1852 } 1853 1854 req_frame_rate = (u32)(frame_interval.denominator 1855 / frame_interval.numerator); 1856 1857 /* boundary check */ 1858 if (req_frame_rate > priv->mode->max_fps) { 1859 frame_interval.numerator = 1; 1860 frame_interval.denominator = priv->mode->max_fps; 1861 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { 1862 frame_interval.numerator = 1; 1863 frame_interval.denominator = IMX274_MIN_FRAME_RATE; 1864 } 1865 1866 /* 1867 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX 1868 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX 1869 */ 1870 1871 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1872 if (err) 1873 goto fail; 1874 1875 dev_dbg(&priv->client->dev, 1876 "%s : register SVR = %d\n", __func__, svr); 1877 1878 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1879 if (err) 1880 goto fail; 1881 1882 dev_dbg(&priv->client->dev, 1883 "%s : register HMAX = %d\n", __func__, hmax); 1884 1885 if (hmax == 0 || frame_interval.denominator == 0) { 1886 err = -EINVAL; 1887 goto fail; 1888 } 1889 1890 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax 1891 * frame_interval.numerator 1892 / frame_interval.denominator; 1893 1894 err = imx274_set_frame_length(priv, frame_length); 1895 if (err) 1896 goto fail; 1897 1898 priv->frame_interval = frame_interval; 1899 return 0; 1900 1901 fail: 1902 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1903 return err; 1904 } 1905 1906 static const struct v4l2_subdev_pad_ops imx274_pad_ops = { 1907 .get_fmt = imx274_get_fmt, 1908 .set_fmt = imx274_set_fmt, 1909 .get_selection = imx274_get_selection, 1910 .set_selection = imx274_set_selection, 1911 }; 1912 1913 static const struct v4l2_subdev_video_ops imx274_video_ops = { 1914 .g_frame_interval = imx274_g_frame_interval, 1915 .s_frame_interval = imx274_s_frame_interval, 1916 .s_stream = imx274_s_stream, 1917 }; 1918 1919 static const struct v4l2_subdev_ops imx274_subdev_ops = { 1920 .pad = &imx274_pad_ops, 1921 .video = &imx274_video_ops, 1922 }; 1923 1924 static const struct v4l2_ctrl_ops imx274_ctrl_ops = { 1925 .s_ctrl = imx274_s_ctrl, 1926 }; 1927 1928 static const struct of_device_id imx274_of_id_table[] = { 1929 { .compatible = "sony,imx274" }, 1930 { } 1931 }; 1932 MODULE_DEVICE_TABLE(of, imx274_of_id_table); 1933 1934 static const struct i2c_device_id imx274_id[] = { 1935 { "IMX274", 0 }, 1936 { } 1937 }; 1938 MODULE_DEVICE_TABLE(i2c, imx274_id); 1939 1940 static int imx274_probe(struct i2c_client *client) 1941 { 1942 struct v4l2_subdev *sd; 1943 struct stimx274 *imx274; 1944 int ret; 1945 1946 /* initialize imx274 */ 1947 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL); 1948 if (!imx274) 1949 return -ENOMEM; 1950 1951 mutex_init(&imx274->lock); 1952 1953 imx274->inck = devm_clk_get_optional(&client->dev, "inck"); 1954 if (IS_ERR(imx274->inck)) 1955 return PTR_ERR(imx274->inck); 1956 1957 ret = imx274_regulators_get(&client->dev, imx274); 1958 if (ret) { 1959 dev_err(&client->dev, 1960 "Failed to get power regulators, err: %d\n", ret); 1961 return ret; 1962 } 1963 1964 /* initialize format */ 1965 imx274->mode = &imx274_modes[0]; 1966 imx274->crop.width = IMX274_MAX_WIDTH; 1967 imx274->crop.height = IMX274_MAX_HEIGHT; 1968 imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio; 1969 imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio; 1970 imx274->format.field = V4L2_FIELD_NONE; 1971 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; 1972 imx274->format.colorspace = V4L2_COLORSPACE_SRGB; 1973 imx274->frame_interval.numerator = 1; 1974 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1975 1976 /* initialize regmap */ 1977 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); 1978 if (IS_ERR(imx274->regmap)) { 1979 dev_err(&client->dev, 1980 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); 1981 ret = -ENODEV; 1982 goto err_regmap; 1983 } 1984 1985 /* initialize subdevice */ 1986 imx274->client = client; 1987 sd = &imx274->sd; 1988 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); 1989 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1990 1991 /* initialize subdev media pad */ 1992 imx274->pad.flags = MEDIA_PAD_FL_SOURCE; 1993 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1994 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); 1995 if (ret < 0) { 1996 dev_err(&client->dev, 1997 "%s : media entity init Failed %d\n", __func__, ret); 1998 goto err_regmap; 1999 } 2000 2001 /* initialize sensor reset gpio */ 2002 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 2003 GPIOD_OUT_HIGH); 2004 if (IS_ERR(imx274->reset_gpio)) { 2005 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) 2006 dev_err(&client->dev, "Reset GPIO not setup in DT"); 2007 ret = PTR_ERR(imx274->reset_gpio); 2008 goto err_me; 2009 } 2010 2011 /* power on the sensor */ 2012 ret = imx274_power_on(&client->dev); 2013 if (ret < 0) { 2014 dev_err(&client->dev, 2015 "%s : imx274 power on failed\n", __func__); 2016 goto err_me; 2017 } 2018 2019 /* initialize controls */ 2020 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 4); 2021 if (ret < 0) { 2022 dev_err(&client->dev, 2023 "%s : ctrl handler init Failed\n", __func__); 2024 goto err_power_off; 2025 } 2026 2027 imx274->ctrls.handler.lock = &imx274->lock; 2028 2029 /* add new controls */ 2030 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( 2031 &imx274->ctrls.handler, &imx274_ctrl_ops, 2032 V4L2_CID_TEST_PATTERN, 2033 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); 2034 2035 imx274->ctrls.gain = v4l2_ctrl_new_std( 2036 &imx274->ctrls.handler, 2037 &imx274_ctrl_ops, 2038 V4L2_CID_GAIN, IMX274_MIN_GAIN, 2039 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, 2040 IMX274_DEF_GAIN); 2041 2042 imx274->ctrls.exposure = v4l2_ctrl_new_std( 2043 &imx274->ctrls.handler, 2044 &imx274_ctrl_ops, 2045 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 2046 1000000 / IMX274_DEF_FRAME_RATE, 1, 2047 IMX274_MIN_EXPOSURE_TIME); 2048 2049 imx274->ctrls.vflip = v4l2_ctrl_new_std( 2050 &imx274->ctrls.handler, 2051 &imx274_ctrl_ops, 2052 V4L2_CID_VFLIP, 0, 1, 1, 0); 2053 2054 imx274->sd.ctrl_handler = &imx274->ctrls.handler; 2055 if (imx274->ctrls.handler.error) { 2056 ret = imx274->ctrls.handler.error; 2057 goto err_ctrls; 2058 } 2059 2060 /* load default control values */ 2061 imx274_load_default(imx274); 2062 2063 /* register subdevice */ 2064 ret = v4l2_async_register_subdev(sd); 2065 if (ret < 0) { 2066 dev_err(&client->dev, 2067 "%s : v4l2_async_register_subdev failed %d\n", 2068 __func__, ret); 2069 goto err_ctrls; 2070 } 2071 2072 pm_runtime_set_active(&client->dev); 2073 pm_runtime_enable(&client->dev); 2074 pm_runtime_idle(&client->dev); 2075 2076 dev_info(&client->dev, "imx274 : imx274 probe success !\n"); 2077 return 0; 2078 2079 err_ctrls: 2080 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 2081 err_power_off: 2082 imx274_power_off(&client->dev); 2083 err_me: 2084 media_entity_cleanup(&sd->entity); 2085 err_regmap: 2086 mutex_destroy(&imx274->lock); 2087 return ret; 2088 } 2089 2090 static int imx274_remove(struct i2c_client *client) 2091 { 2092 struct v4l2_subdev *sd = i2c_get_clientdata(client); 2093 struct stimx274 *imx274 = to_imx274(sd); 2094 2095 pm_runtime_disable(&client->dev); 2096 if (!pm_runtime_status_suspended(&client->dev)) 2097 imx274_power_off(&client->dev); 2098 pm_runtime_set_suspended(&client->dev); 2099 2100 v4l2_async_unregister_subdev(sd); 2101 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 2102 2103 media_entity_cleanup(&sd->entity); 2104 mutex_destroy(&imx274->lock); 2105 return 0; 2106 } 2107 2108 static const struct dev_pm_ops imx274_pm_ops = { 2109 SET_RUNTIME_PM_OPS(imx274_power_off, imx274_power_on, NULL) 2110 }; 2111 2112 static struct i2c_driver imx274_i2c_driver = { 2113 .driver = { 2114 .name = DRIVER_NAME, 2115 .pm = &imx274_pm_ops, 2116 .of_match_table = imx274_of_id_table, 2117 }, 2118 .probe_new = imx274_probe, 2119 .remove = imx274_remove, 2120 .id_table = imx274_id, 2121 }; 2122 2123 module_i2c_driver(imx274_i2c_driver); 2124 2125 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); 2126 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); 2127 MODULE_LICENSE("GPL v2"); 2128