1 /* 2 * imx274.c - IMX274 CMOS Image Sensor driver 3 * 4 * Copyright (C) 2017, Leopard Imaging, Inc. 5 * 6 * Leon Luo <leonl@leopardimaging.com> 7 * Edwin Zou <edwinz@leopardimaging.com> 8 * Luca Ceresoli <luca@lucaceresoli.net> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms and conditions of the GNU General Public License, 12 * version 2, as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 17 * more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program. If not, see <http://www.gnu.org/licenses/>. 21 */ 22 23 #include <linux/clk.h> 24 #include <linux/delay.h> 25 #include <linux/gpio.h> 26 #include <linux/gpio/consumer.h> 27 #include <linux/i2c.h> 28 #include <linux/init.h> 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/of_gpio.h> 32 #include <linux/regmap.h> 33 #include <linux/slab.h> 34 #include <linux/v4l2-mediabus.h> 35 #include <linux/videodev2.h> 36 37 #include <media/v4l2-ctrls.h> 38 #include <media/v4l2-device.h> 39 #include <media/v4l2-subdev.h> 40 41 /* 42 * See "SHR, SVR Setting" in datasheet 43 */ 44 #define IMX274_DEFAULT_FRAME_LENGTH (4550) 45 #define IMX274_MAX_FRAME_LENGTH (0x000fffff) 46 47 /* 48 * See "Frame Rate Adjustment" in datasheet 49 */ 50 #define IMX274_PIXCLK_CONST1 (72000000) 51 #define IMX274_PIXCLK_CONST2 (1000000) 52 53 /* 54 * The input gain is shifted by IMX274_GAIN_SHIFT to get 55 * decimal number. The real gain is 56 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) 57 */ 58 #define IMX274_GAIN_SHIFT (8) 59 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) 60 61 /* 62 * See "Analog Gain" and "Digital Gain" in datasheet 63 * min gain is 1X 64 * max gain is calculated based on IMX274_GAIN_REG_MAX 65 */ 66 #define IMX274_GAIN_REG_MAX (1957) 67 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) 68 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ 69 / (2048 - IMX274_GAIN_REG_MAX)) 70 #define IMX274_MAX_DIGITAL_GAIN (8) 71 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) 72 #define IMX274_GAIN_CONST (2048) /* for gain formula */ 73 74 /* 75 * 1 line time in us = (HMAX / 72), minimal is 4 lines 76 */ 77 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) 78 79 #define IMX274_DEFAULT_MODE IMX274_BINNING_OFF 80 #define IMX274_MAX_WIDTH (3840) 81 #define IMX274_MAX_HEIGHT (2160) 82 #define IMX274_MAX_FRAME_RATE (120) 83 #define IMX274_MIN_FRAME_RATE (5) 84 #define IMX274_DEF_FRAME_RATE (60) 85 86 /* 87 * register SHR is limited to (SVR value + 1) x VMAX value - 4 88 */ 89 #define IMX274_SHR_LIMIT_CONST (4) 90 91 /* 92 * Min and max sensor reset delay (microseconds) 93 */ 94 #define IMX274_RESET_DELAY1 (2000) 95 #define IMX274_RESET_DELAY2 (2200) 96 97 /* 98 * shift and mask constants 99 */ 100 #define IMX274_SHIFT_8_BITS (8) 101 #define IMX274_SHIFT_16_BITS (16) 102 #define IMX274_MASK_LSB_2_BITS (0x03) 103 #define IMX274_MASK_LSB_3_BITS (0x07) 104 #define IMX274_MASK_LSB_4_BITS (0x0f) 105 #define IMX274_MASK_LSB_8_BITS (0x00ff) 106 107 #define DRIVER_NAME "IMX274" 108 109 /* 110 * IMX274 register definitions 111 */ 112 #define IMX274_SHR_REG_MSB 0x300D /* SHR */ 113 #define IMX274_SHR_REG_LSB 0x300C /* SHR */ 114 #define IMX274_SVR_REG_MSB 0x300F /* SVR */ 115 #define IMX274_SVR_REG_LSB 0x300E /* SVR */ 116 #define IMX274_HTRIM_EN_REG 0x3037 117 #define IMX274_HTRIM_START_REG_LSB 0x3038 118 #define IMX274_HTRIM_START_REG_MSB 0x3039 119 #define IMX274_HTRIM_END_REG_LSB 0x303A 120 #define IMX274_HTRIM_END_REG_MSB 0x303B 121 #define IMX274_VWIDCUTEN_REG 0x30DD 122 #define IMX274_VWIDCUT_REG_LSB 0x30DE 123 #define IMX274_VWIDCUT_REG_MSB 0x30DF 124 #define IMX274_VWINPOS_REG_LSB 0x30E0 125 #define IMX274_VWINPOS_REG_MSB 0x30E1 126 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130 127 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131 128 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132 129 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133 130 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */ 131 #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */ 132 #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */ 133 #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ 134 #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ 135 #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */ 136 #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */ 137 #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */ 138 #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ 139 #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */ 140 #define IMX274_STANDBY_REG 0x3000 /* STANDBY */ 141 142 #define IMX274_TABLE_WAIT_MS 0 143 #define IMX274_TABLE_END 1 144 145 /* 146 * imx274 I2C operation related structure 147 */ 148 struct reg_8 { 149 u16 addr; 150 u8 val; 151 }; 152 153 static const struct regmap_config imx274_regmap_config = { 154 .reg_bits = 16, 155 .val_bits = 8, 156 .cache_type = REGCACHE_RBTREE, 157 }; 158 159 enum imx274_binning { 160 IMX274_BINNING_OFF, 161 IMX274_BINNING_2_1, 162 IMX274_BINNING_3_1, 163 }; 164 165 /* 166 * Parameters for each imx274 readout mode. 167 * 168 * These are the values to configure the sensor in one of the 169 * implemented modes. 170 * 171 * @init_regs: registers to initialize the mode 172 * @bin_ratio: downscale factor (e.g. 3 for 3:1 binning) 173 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate 174 * Adjustment (CSI-2)" in the datasheet) 175 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the 176 * datasheet) 177 * @max_fps: Maximum frames per second 178 * @nocpiop: Number of clocks per internal offset period (see "Integration Time 179 * in Each Readout Drive Mode (CSI-2)" in the datasheet) 180 */ 181 struct imx274_frmfmt { 182 const struct reg_8 *init_regs; 183 unsigned int bin_ratio; 184 int min_frame_len; 185 int min_SHR; 186 int max_fps; 187 int nocpiop; 188 }; 189 190 /* 191 * imx274 test pattern related structure 192 */ 193 enum { 194 TEST_PATTERN_DISABLED = 0, 195 TEST_PATTERN_ALL_000H, 196 TEST_PATTERN_ALL_FFFH, 197 TEST_PATTERN_ALL_555H, 198 TEST_PATTERN_ALL_AAAH, 199 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ 200 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ 201 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ 202 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ 203 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ 204 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ 205 TEST_PATTERN_H_COLOR_BARS, 206 TEST_PATTERN_V_COLOR_BARS, 207 }; 208 209 static const char * const tp_qmenu[] = { 210 "Disabled", 211 "All 000h Pattern", 212 "All FFFh Pattern", 213 "All 555h Pattern", 214 "All AAAh Pattern", 215 "Vertical Stripe (555h / AAAh)", 216 "Vertical Stripe (AAAh / 555h)", 217 "Vertical Stripe (000h / 555h)", 218 "Vertical Stripe (555h / 000h)", 219 "Vertical Stripe (000h / FFFh)", 220 "Vertical Stripe (FFFh / 000h)", 221 "Horizontal Color Bars", 222 "Vertical Color Bars", 223 }; 224 225 /* 226 * All-pixel scan mode (10-bit) 227 * imx274 mode1(refer to datasheet) register configuration with 228 * 3840x2160 resolution, raw10 data and mipi four lane output 229 */ 230 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { 231 {0x3004, 0x01}, 232 {0x3005, 0x01}, 233 {0x3006, 0x00}, 234 {0x3007, 0xa2}, 235 236 {0x3018, 0xA2}, /* output XVS, HVS */ 237 238 {0x306B, 0x05}, 239 {0x30E2, 0x01}, 240 241 {0x30EE, 0x01}, 242 {0x3342, 0x0A}, 243 {0x3343, 0x00}, 244 {0x3344, 0x16}, 245 {0x3345, 0x00}, 246 {0x33A6, 0x01}, 247 {0x3528, 0x0E}, 248 {0x3554, 0x1F}, 249 {0x3555, 0x01}, 250 {0x3556, 0x01}, 251 {0x3557, 0x01}, 252 {0x3558, 0x01}, 253 {0x3559, 0x00}, 254 {0x355A, 0x00}, 255 {0x35BA, 0x0E}, 256 {0x366A, 0x1B}, 257 {0x366B, 0x1A}, 258 {0x366C, 0x19}, 259 {0x366D, 0x17}, 260 {0x3A41, 0x08}, 261 262 {IMX274_TABLE_END, 0x00} 263 }; 264 265 /* 266 * Horizontal/vertical 2/2-line binning 267 * (Horizontal and vertical weightedbinning, 10-bit) 268 * imx274 mode3(refer to datasheet) register configuration with 269 * 1920x1080 resolution, raw10 data and mipi four lane output 270 */ 271 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { 272 {0x3004, 0x02}, 273 {0x3005, 0x21}, 274 {0x3006, 0x00}, 275 {0x3007, 0xb1}, 276 277 {0x3018, 0xA2}, /* output XVS, HVS */ 278 279 {0x306B, 0x05}, 280 {0x30E2, 0x02}, 281 282 {0x30EE, 0x01}, 283 {0x3342, 0x0A}, 284 {0x3343, 0x00}, 285 {0x3344, 0x1A}, 286 {0x3345, 0x00}, 287 {0x33A6, 0x01}, 288 {0x3528, 0x0E}, 289 {0x3554, 0x00}, 290 {0x3555, 0x01}, 291 {0x3556, 0x01}, 292 {0x3557, 0x01}, 293 {0x3558, 0x01}, 294 {0x3559, 0x00}, 295 {0x355A, 0x00}, 296 {0x35BA, 0x0E}, 297 {0x366A, 0x1B}, 298 {0x366B, 0x1A}, 299 {0x366C, 0x19}, 300 {0x366D, 0x17}, 301 {0x3A41, 0x08}, 302 303 {IMX274_TABLE_END, 0x00} 304 }; 305 306 /* 307 * Vertical 2/3 subsampling binning horizontal 3 binning 308 * imx274 mode5(refer to datasheet) register configuration with 309 * 1280x720 resolution, raw10 data and mipi four lane output 310 */ 311 static const struct reg_8 imx274_mode5_1280x720_raw10[] = { 312 {0x3004, 0x03}, 313 {0x3005, 0x31}, 314 {0x3006, 0x00}, 315 {0x3007, 0xa9}, 316 317 {0x3018, 0xA2}, /* output XVS, HVS */ 318 319 {0x306B, 0x05}, 320 {0x30E2, 0x03}, 321 322 {0x30EE, 0x01}, 323 {0x3342, 0x0A}, 324 {0x3343, 0x00}, 325 {0x3344, 0x1B}, 326 {0x3345, 0x00}, 327 {0x33A6, 0x01}, 328 {0x3528, 0x0E}, 329 {0x3554, 0x00}, 330 {0x3555, 0x01}, 331 {0x3556, 0x01}, 332 {0x3557, 0x01}, 333 {0x3558, 0x01}, 334 {0x3559, 0x00}, 335 {0x355A, 0x00}, 336 {0x35BA, 0x0E}, 337 {0x366A, 0x1B}, 338 {0x366B, 0x19}, 339 {0x366C, 0x17}, 340 {0x366D, 0x17}, 341 {0x3A41, 0x04}, 342 343 {IMX274_TABLE_END, 0x00} 344 }; 345 346 /* 347 * imx274 first step register configuration for 348 * starting stream 349 */ 350 static const struct reg_8 imx274_start_1[] = { 351 {IMX274_STANDBY_REG, 0x12}, 352 {IMX274_TABLE_END, 0x00} 353 }; 354 355 /* 356 * imx274 second step register configuration for 357 * starting stream 358 */ 359 static const struct reg_8 imx274_start_2[] = { 360 {0x3120, 0xF0}, /* clock settings */ 361 {0x3121, 0x00}, /* clock settings */ 362 {0x3122, 0x02}, /* clock settings */ 363 {0x3129, 0x9C}, /* clock settings */ 364 {0x312A, 0x02}, /* clock settings */ 365 {0x312D, 0x02}, /* clock settings */ 366 367 {0x310B, 0x00}, 368 369 /* PLSTMG */ 370 {0x304C, 0x00}, /* PLSTMG01 */ 371 {0x304D, 0x03}, 372 {0x331C, 0x1A}, 373 {0x331D, 0x00}, 374 {0x3502, 0x02}, 375 {0x3529, 0x0E}, 376 {0x352A, 0x0E}, 377 {0x352B, 0x0E}, 378 {0x3538, 0x0E}, 379 {0x3539, 0x0E}, 380 {0x3553, 0x00}, 381 {0x357D, 0x05}, 382 {0x357F, 0x05}, 383 {0x3581, 0x04}, 384 {0x3583, 0x76}, 385 {0x3587, 0x01}, 386 {0x35BB, 0x0E}, 387 {0x35BC, 0x0E}, 388 {0x35BD, 0x0E}, 389 {0x35BE, 0x0E}, 390 {0x35BF, 0x0E}, 391 {0x366E, 0x00}, 392 {0x366F, 0x00}, 393 {0x3670, 0x00}, 394 {0x3671, 0x00}, 395 396 /* PSMIPI */ 397 {0x3304, 0x32}, /* PSMIPI1 */ 398 {0x3305, 0x00}, 399 {0x3306, 0x32}, 400 {0x3307, 0x00}, 401 {0x3590, 0x32}, 402 {0x3591, 0x00}, 403 {0x3686, 0x32}, 404 {0x3687, 0x00}, 405 406 {IMX274_TABLE_END, 0x00} 407 }; 408 409 /* 410 * imx274 third step register configuration for 411 * starting stream 412 */ 413 static const struct reg_8 imx274_start_3[] = { 414 {IMX274_STANDBY_REG, 0x00}, 415 {0x303E, 0x02}, /* SYS_MODE = 2 */ 416 {IMX274_TABLE_END, 0x00} 417 }; 418 419 /* 420 * imx274 forth step register configuration for 421 * starting stream 422 */ 423 static const struct reg_8 imx274_start_4[] = { 424 {0x30F4, 0x00}, 425 {0x3018, 0xA2}, /* XHS VHS OUTUPT */ 426 {IMX274_TABLE_END, 0x00} 427 }; 428 429 /* 430 * imx274 register configuration for stoping stream 431 */ 432 static const struct reg_8 imx274_stop[] = { 433 {IMX274_STANDBY_REG, 0x01}, 434 {IMX274_TABLE_END, 0x00} 435 }; 436 437 /* 438 * imx274 disable test pattern register configuration 439 */ 440 static const struct reg_8 imx274_tp_disabled[] = { 441 {0x303C, 0x00}, 442 {0x377F, 0x00}, 443 {0x3781, 0x00}, 444 {0x370B, 0x00}, 445 {IMX274_TABLE_END, 0x00} 446 }; 447 448 /* 449 * imx274 test pattern register configuration 450 * reg 0x303D defines the test pattern modes 451 */ 452 static const struct reg_8 imx274_tp_regs[] = { 453 {0x303C, 0x11}, 454 {0x370E, 0x01}, 455 {0x377F, 0x01}, 456 {0x3781, 0x01}, 457 {0x370B, 0x11}, 458 {IMX274_TABLE_END, 0x00} 459 }; 460 461 /* nocpiop happens to be the same number for the implemented modes */ 462 static const struct imx274_frmfmt imx274_formats[] = { 463 { 464 /* mode 1, 4K */ 465 .bin_ratio = 1, 466 .init_regs = imx274_mode1_3840x2160_raw10, 467 .min_frame_len = 4550, 468 .min_SHR = 12, 469 .max_fps = 60, 470 .nocpiop = 112, 471 }, 472 { 473 /* mode 3, 1080p */ 474 .bin_ratio = 2, 475 .init_regs = imx274_mode3_1920x1080_raw10, 476 .min_frame_len = 2310, 477 .min_SHR = 8, 478 .max_fps = 120, 479 .nocpiop = 112, 480 }, 481 { 482 /* mode 5, 720p */ 483 .bin_ratio = 3, 484 .init_regs = imx274_mode5_1280x720_raw10, 485 .min_frame_len = 2310, 486 .min_SHR = 8, 487 .max_fps = 120, 488 .nocpiop = 112, 489 }, 490 }; 491 492 /* 493 * struct imx274_ctrls - imx274 ctrl structure 494 * @handler: V4L2 ctrl handler structure 495 * @exposure: Pointer to expsure ctrl structure 496 * @gain: Pointer to gain ctrl structure 497 * @vflip: Pointer to vflip ctrl structure 498 * @test_pattern: Pointer to test pattern ctrl structure 499 */ 500 struct imx274_ctrls { 501 struct v4l2_ctrl_handler handler; 502 struct v4l2_ctrl *exposure; 503 struct v4l2_ctrl *gain; 504 struct v4l2_ctrl *vflip; 505 struct v4l2_ctrl *test_pattern; 506 }; 507 508 /* 509 * struct stim274 - imx274 device structure 510 * @sd: V4L2 subdevice structure 511 * @pad: Media pad structure 512 * @client: Pointer to I2C client 513 * @ctrls: imx274 control structure 514 * @crop: rect to be captured 515 * @compose: compose rect, i.e. output resolution 516 * @format: V4L2 media bus frame format structure 517 * (width and height are in sync with the compose rect) 518 * @frame_rate: V4L2 frame rate structure 519 * @regmap: Pointer to regmap structure 520 * @reset_gpio: Pointer to reset gpio 521 * @lock: Mutex structure 522 * @mode: Parameters for the selected readout mode 523 */ 524 struct stimx274 { 525 struct v4l2_subdev sd; 526 struct media_pad pad; 527 struct i2c_client *client; 528 struct imx274_ctrls ctrls; 529 struct v4l2_rect crop; 530 struct v4l2_mbus_framefmt format; 531 struct v4l2_fract frame_interval; 532 struct regmap *regmap; 533 struct gpio_desc *reset_gpio; 534 struct mutex lock; /* mutex lock for operations */ 535 const struct imx274_frmfmt *mode; 536 }; 537 538 #define IMX274_ROUND(dim, step, flags) \ 539 ((flags) & V4L2_SEL_FLAG_GE \ 540 ? roundup((dim), (step)) \ 541 : ((flags) & V4L2_SEL_FLAG_LE \ 542 ? rounddown((dim), (step)) \ 543 : rounddown((dim) + (step) / 2, (step)))) 544 545 /* 546 * Function declaration 547 */ 548 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); 549 static int imx274_set_exposure(struct stimx274 *priv, int val); 550 static int imx274_set_vflip(struct stimx274 *priv, int val); 551 static int imx274_set_test_pattern(struct stimx274 *priv, int val); 552 static int imx274_set_frame_interval(struct stimx274 *priv, 553 struct v4l2_fract frame_interval); 554 555 static inline void msleep_range(unsigned int delay_base) 556 { 557 usleep_range(delay_base * 1000, delay_base * 1000 + 500); 558 } 559 560 /* 561 * v4l2_ctrl and v4l2_subdev related operations 562 */ 563 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 564 { 565 return &container_of(ctrl->handler, 566 struct stimx274, ctrls.handler)->sd; 567 } 568 569 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) 570 { 571 return container_of(sd, struct stimx274, sd); 572 } 573 574 /* 575 * Writing a register table 576 * 577 * @priv: Pointer to device 578 * @table: Table containing register values (with optional delays) 579 * 580 * This is used to write register table into sensor's reg map. 581 * 582 * Return: 0 on success, errors otherwise 583 */ 584 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) 585 { 586 struct regmap *regmap = priv->regmap; 587 int err = 0; 588 const struct reg_8 *next; 589 u8 val; 590 591 int range_start = -1; 592 int range_count = 0; 593 u8 range_vals[16]; 594 int max_range_vals = ARRAY_SIZE(range_vals); 595 596 for (next = table;; next++) { 597 if ((next->addr != range_start + range_count) || 598 (next->addr == IMX274_TABLE_END) || 599 (next->addr == IMX274_TABLE_WAIT_MS) || 600 (range_count == max_range_vals)) { 601 if (range_count == 1) 602 err = regmap_write(regmap, 603 range_start, range_vals[0]); 604 else if (range_count > 1) 605 err = regmap_bulk_write(regmap, range_start, 606 &range_vals[0], 607 range_count); 608 else 609 err = 0; 610 611 if (err) 612 return err; 613 614 range_start = -1; 615 range_count = 0; 616 617 /* Handle special address values */ 618 if (next->addr == IMX274_TABLE_END) 619 break; 620 621 if (next->addr == IMX274_TABLE_WAIT_MS) { 622 msleep_range(next->val); 623 continue; 624 } 625 } 626 627 val = next->val; 628 629 if (range_start == -1) 630 range_start = next->addr; 631 632 range_vals[range_count++] = val; 633 } 634 return 0; 635 } 636 637 static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val) 638 { 639 int err; 640 641 err = regmap_read(priv->regmap, addr, (unsigned int *)val); 642 if (err) 643 dev_err(&priv->client->dev, 644 "%s : i2c read failed, addr = %x\n", __func__, addr); 645 else 646 dev_dbg(&priv->client->dev, 647 "%s : addr 0x%x, val=0x%x\n", __func__, 648 addr, *val); 649 return err; 650 } 651 652 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) 653 { 654 int err; 655 656 err = regmap_write(priv->regmap, addr, val); 657 if (err) 658 dev_err(&priv->client->dev, 659 "%s : i2c write failed, %x = %x\n", __func__, 660 addr, val); 661 else 662 dev_dbg(&priv->client->dev, 663 "%s : addr 0x%x, val=0x%x\n", __func__, 664 addr, val); 665 return err; 666 } 667 668 /** 669 * Write a multibyte register. 670 * 671 * Uses a bulk write where possible. 672 * 673 * @priv: Pointer to device structure 674 * @addr: Address of the LSB register. Other registers must be 675 * consecutive, least-to-most significant. 676 * @val: Value to be written to the register (cpu endianness) 677 * @nbytes: Number of bits to write (range: [1..3]) 678 */ 679 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, 680 size_t nbytes) 681 { 682 __le32 val_le = cpu_to_le32(val); 683 int err; 684 685 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); 686 if (err) 687 dev_err(&priv->client->dev, 688 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", 689 __func__, addr, val, nbytes); 690 else 691 dev_dbg(&priv->client->dev, 692 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 693 __func__, addr, val, nbytes); 694 return err; 695 } 696 697 /* 698 * Set mode registers to start stream. 699 * @priv: Pointer to device structure 700 * 701 * Return: 0 on success, errors otherwise 702 */ 703 static int imx274_mode_regs(struct stimx274 *priv) 704 { 705 int err = 0; 706 707 err = imx274_write_table(priv, imx274_start_1); 708 if (err) 709 return err; 710 711 err = imx274_write_table(priv, imx274_start_2); 712 if (err) 713 return err; 714 715 err = imx274_write_table(priv, priv->mode->init_regs); 716 717 return err; 718 } 719 720 /* 721 * imx274_start_stream - Function for starting stream per mode index 722 * @priv: Pointer to device structure 723 * 724 * Return: 0 on success, errors otherwise 725 */ 726 static int imx274_start_stream(struct stimx274 *priv) 727 { 728 int err = 0; 729 730 /* 731 * Refer to "Standby Cancel Sequence when using CSI-2" in 732 * imx274 datasheet, it should wait 10ms or more here. 733 * give it 1 extra ms for margin 734 */ 735 msleep_range(11); 736 err = imx274_write_table(priv, imx274_start_3); 737 if (err) 738 return err; 739 740 /* 741 * Refer to "Standby Cancel Sequence when using CSI-2" in 742 * imx274 datasheet, it should wait 7ms or more here. 743 * give it 1 extra ms for margin 744 */ 745 msleep_range(8); 746 err = imx274_write_table(priv, imx274_start_4); 747 if (err) 748 return err; 749 750 return 0; 751 } 752 753 /* 754 * imx274_reset - Function called to reset the sensor 755 * @priv: Pointer to device structure 756 * @rst: Input value for determining the sensor's end state after reset 757 * 758 * Set the senor in reset and then 759 * if rst = 0, keep it in reset; 760 * if rst = 1, bring it out of reset. 761 * 762 */ 763 static void imx274_reset(struct stimx274 *priv, int rst) 764 { 765 gpiod_set_value_cansleep(priv->reset_gpio, 0); 766 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 767 gpiod_set_value_cansleep(priv->reset_gpio, !!rst); 768 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 769 } 770 771 /** 772 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls 773 * @ctrl: V4L2 control to be set 774 * 775 * This function is used to set the V4L2 controls for the imx274 sensor. 776 * 777 * Return: 0 on success, errors otherwise 778 */ 779 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) 780 { 781 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 782 struct stimx274 *imx274 = to_imx274(sd); 783 int ret = -EINVAL; 784 785 dev_dbg(&imx274->client->dev, 786 "%s : s_ctrl: %s, value: %d\n", __func__, 787 ctrl->name, ctrl->val); 788 789 switch (ctrl->id) { 790 case V4L2_CID_EXPOSURE: 791 dev_dbg(&imx274->client->dev, 792 "%s : set V4L2_CID_EXPOSURE\n", __func__); 793 ret = imx274_set_exposure(imx274, ctrl->val); 794 break; 795 796 case V4L2_CID_GAIN: 797 dev_dbg(&imx274->client->dev, 798 "%s : set V4L2_CID_GAIN\n", __func__); 799 ret = imx274_set_gain(imx274, ctrl); 800 break; 801 802 case V4L2_CID_VFLIP: 803 dev_dbg(&imx274->client->dev, 804 "%s : set V4L2_CID_VFLIP\n", __func__); 805 ret = imx274_set_vflip(imx274, ctrl->val); 806 break; 807 808 case V4L2_CID_TEST_PATTERN: 809 dev_dbg(&imx274->client->dev, 810 "%s : set V4L2_CID_TEST_PATTERN\n", __func__); 811 ret = imx274_set_test_pattern(imx274, ctrl->val); 812 break; 813 } 814 815 return ret; 816 } 817 818 static int imx274_binning_goodness(struct stimx274 *imx274, 819 int w, int ask_w, 820 int h, int ask_h, u32 flags) 821 { 822 struct device *dev = &imx274->client->dev; 823 const int goodness = 100000; 824 int val = 0; 825 826 if (flags & V4L2_SEL_FLAG_GE) { 827 if (w < ask_w) 828 val -= goodness; 829 if (h < ask_h) 830 val -= goodness; 831 } 832 833 if (flags & V4L2_SEL_FLAG_LE) { 834 if (w > ask_w) 835 val -= goodness; 836 if (h > ask_h) 837 val -= goodness; 838 } 839 840 val -= abs(w - ask_w); 841 val -= abs(h - ask_h); 842 843 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", 844 __func__, ask_w, ask_h, w, h, val); 845 846 return val; 847 } 848 849 /** 850 * Helper function to change binning and set both compose and format. 851 * 852 * We have two entry points to change binning: set_fmt and 853 * set_selection(COMPOSE). Both have to compute the new output size 854 * and set it in both the compose rect and the frame format size. We 855 * also need to do the same things after setting cropping to restore 856 * 1:1 binning. 857 * 858 * This function contains the common code for these three cases, it 859 * has many arguments in order to accommodate the needs of all of 860 * them. 861 * 862 * Must be called with imx274->lock locked. 863 * 864 * @imx274: The device object 865 * @cfg: The pad config we are editing for TRY requests 866 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller 867 * @width: Input-output parameter: set to the desired width before 868 * the call, contains the chosen value after returning successfully 869 * @height: Input-output parameter for height (see @width) 870 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not 871 * available (when called from set_fmt) 872 */ 873 static int __imx274_change_compose(struct stimx274 *imx274, 874 struct v4l2_subdev_pad_config *cfg, 875 u32 which, 876 u32 *width, 877 u32 *height, 878 u32 flags) 879 { 880 struct device *dev = &imx274->client->dev; 881 const struct v4l2_rect *cur_crop; 882 struct v4l2_mbus_framefmt *tgt_fmt; 883 unsigned int i; 884 const struct imx274_frmfmt *best_mode = &imx274_formats[0]; 885 int best_goodness = INT_MIN; 886 887 if (which == V4L2_SUBDEV_FORMAT_TRY) { 888 cur_crop = &cfg->try_crop; 889 tgt_fmt = &cfg->try_fmt; 890 } else { 891 cur_crop = &imx274->crop; 892 tgt_fmt = &imx274->format; 893 } 894 895 for (i = 0; i < ARRAY_SIZE(imx274_formats); i++) { 896 unsigned int ratio = imx274_formats[i].bin_ratio; 897 898 int goodness = imx274_binning_goodness( 899 imx274, 900 cur_crop->width / ratio, *width, 901 cur_crop->height / ratio, *height, 902 flags); 903 904 if (goodness >= best_goodness) { 905 best_goodness = goodness; 906 best_mode = &imx274_formats[i]; 907 } 908 } 909 910 *width = cur_crop->width / best_mode->bin_ratio; 911 *height = cur_crop->height / best_mode->bin_ratio; 912 913 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) 914 imx274->mode = best_mode; 915 916 dev_dbg(dev, "%s: selected %u:1 binning\n", 917 __func__, best_mode->bin_ratio); 918 919 tgt_fmt->width = *width; 920 tgt_fmt->height = *height; 921 tgt_fmt->field = V4L2_FIELD_NONE; 922 923 return 0; 924 } 925 926 /** 927 * imx274_get_fmt - Get the pad format 928 * @sd: Pointer to V4L2 Sub device structure 929 * @cfg: Pointer to sub device pad information structure 930 * @fmt: Pointer to pad level media bus format 931 * 932 * This function is used to get the pad format information. 933 * 934 * Return: 0 on success 935 */ 936 static int imx274_get_fmt(struct v4l2_subdev *sd, 937 struct v4l2_subdev_pad_config *cfg, 938 struct v4l2_subdev_format *fmt) 939 { 940 struct stimx274 *imx274 = to_imx274(sd); 941 942 mutex_lock(&imx274->lock); 943 fmt->format = imx274->format; 944 mutex_unlock(&imx274->lock); 945 return 0; 946 } 947 948 /** 949 * imx274_set_fmt - This is used to set the pad format 950 * @sd: Pointer to V4L2 Sub device structure 951 * @cfg: Pointer to sub device pad information structure 952 * @format: Pointer to pad level media bus format 953 * 954 * This function is used to set the pad format. 955 * 956 * Return: 0 on success 957 */ 958 static int imx274_set_fmt(struct v4l2_subdev *sd, 959 struct v4l2_subdev_pad_config *cfg, 960 struct v4l2_subdev_format *format) 961 { 962 struct v4l2_mbus_framefmt *fmt = &format->format; 963 struct stimx274 *imx274 = to_imx274(sd); 964 int err = 0; 965 966 mutex_lock(&imx274->lock); 967 968 err = __imx274_change_compose(imx274, cfg, format->which, 969 &fmt->width, &fmt->height, 0); 970 971 if (err) 972 goto out; 973 974 /* 975 * __imx274_change_compose already set width and height in the 976 * applicable format, but we need to keep all other format 977 * values, so do a full copy here 978 */ 979 fmt->field = V4L2_FIELD_NONE; 980 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 981 cfg->try_fmt = *fmt; 982 else 983 imx274->format = *fmt; 984 985 out: 986 mutex_unlock(&imx274->lock); 987 988 return err; 989 } 990 991 static int imx274_get_selection(struct v4l2_subdev *sd, 992 struct v4l2_subdev_pad_config *cfg, 993 struct v4l2_subdev_selection *sel) 994 { 995 struct stimx274 *imx274 = to_imx274(sd); 996 const struct v4l2_rect *src_crop; 997 const struct v4l2_mbus_framefmt *src_fmt; 998 int ret = 0; 999 1000 if (sel->pad != 0) 1001 return -EINVAL; 1002 1003 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { 1004 sel->r.left = 0; 1005 sel->r.top = 0; 1006 sel->r.width = IMX274_MAX_WIDTH; 1007 sel->r.height = IMX274_MAX_HEIGHT; 1008 return 0; 1009 } 1010 1011 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1012 src_crop = &cfg->try_crop; 1013 src_fmt = &cfg->try_fmt; 1014 } else { 1015 src_crop = &imx274->crop; 1016 src_fmt = &imx274->format; 1017 } 1018 1019 mutex_lock(&imx274->lock); 1020 1021 switch (sel->target) { 1022 case V4L2_SEL_TGT_CROP: 1023 sel->r = *src_crop; 1024 break; 1025 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1026 sel->r.top = 0; 1027 sel->r.left = 0; 1028 sel->r.width = src_crop->width; 1029 sel->r.height = src_crop->height; 1030 break; 1031 case V4L2_SEL_TGT_COMPOSE: 1032 sel->r.top = 0; 1033 sel->r.left = 0; 1034 sel->r.width = src_fmt->width; 1035 sel->r.height = src_fmt->height; 1036 break; 1037 default: 1038 ret = -EINVAL; 1039 } 1040 1041 mutex_unlock(&imx274->lock); 1042 1043 return ret; 1044 } 1045 1046 static int imx274_set_selection_crop(struct stimx274 *imx274, 1047 struct v4l2_subdev_pad_config *cfg, 1048 struct v4l2_subdev_selection *sel) 1049 { 1050 struct v4l2_rect *tgt_crop; 1051 struct v4l2_rect new_crop; 1052 bool size_changed; 1053 1054 /* 1055 * h_step could be 12 or 24 depending on the binning. But we 1056 * won't know the binning until we choose the mode later in 1057 * __imx274_change_compose(). Thus let's be safe and use the 1058 * most conservative value in all cases. 1059 */ 1060 const u32 h_step = 24; 1061 1062 new_crop.width = min_t(u32, 1063 IMX274_ROUND(sel->r.width, h_step, sel->flags), 1064 IMX274_MAX_WIDTH); 1065 1066 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ 1067 if (new_crop.width < 144) 1068 new_crop.width = 144; 1069 1070 new_crop.left = min_t(u32, 1071 IMX274_ROUND(sel->r.left, h_step, 0), 1072 IMX274_MAX_WIDTH - new_crop.width); 1073 1074 new_crop.height = min_t(u32, 1075 IMX274_ROUND(sel->r.height, 2, sel->flags), 1076 IMX274_MAX_HEIGHT); 1077 1078 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), 1079 IMX274_MAX_HEIGHT - new_crop.height); 1080 1081 sel->r = new_crop; 1082 1083 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1084 tgt_crop = &cfg->try_crop; 1085 else 1086 tgt_crop = &imx274->crop; 1087 1088 mutex_lock(&imx274->lock); 1089 1090 size_changed = (new_crop.width != tgt_crop->width || 1091 new_crop.height != tgt_crop->height); 1092 1093 /* __imx274_change_compose needs the new size in *tgt_crop */ 1094 *tgt_crop = new_crop; 1095 1096 /* if crop size changed then reset the output image size */ 1097 if (size_changed) 1098 __imx274_change_compose(imx274, cfg, sel->which, 1099 &new_crop.width, &new_crop.height, 1100 sel->flags); 1101 1102 mutex_unlock(&imx274->lock); 1103 1104 return 0; 1105 } 1106 1107 static int imx274_set_selection(struct v4l2_subdev *sd, 1108 struct v4l2_subdev_pad_config *cfg, 1109 struct v4l2_subdev_selection *sel) 1110 { 1111 struct stimx274 *imx274 = to_imx274(sd); 1112 1113 if (sel->pad != 0) 1114 return -EINVAL; 1115 1116 if (sel->target == V4L2_SEL_TGT_CROP) 1117 return imx274_set_selection_crop(imx274, cfg, sel); 1118 1119 if (sel->target == V4L2_SEL_TGT_COMPOSE) { 1120 int err; 1121 1122 mutex_lock(&imx274->lock); 1123 err = __imx274_change_compose(imx274, cfg, sel->which, 1124 &sel->r.width, &sel->r.height, 1125 sel->flags); 1126 mutex_unlock(&imx274->lock); 1127 1128 /* 1129 * __imx274_change_compose already set width and 1130 * height in set->r, we still need to set top-left 1131 */ 1132 if (!err) { 1133 sel->r.top = 0; 1134 sel->r.left = 0; 1135 } 1136 1137 return err; 1138 } 1139 1140 return -EINVAL; 1141 } 1142 1143 static int imx274_apply_trimming(struct stimx274 *imx274) 1144 { 1145 u32 h_start; 1146 u32 h_end; 1147 u32 hmax; 1148 u32 v_cut; 1149 s32 v_pos; 1150 u32 write_v_size; 1151 u32 y_out_size; 1152 int err; 1153 1154 h_start = imx274->crop.left + 12; 1155 h_end = h_start + imx274->crop.width; 1156 1157 /* Use the minimum allowed value of HMAX */ 1158 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ 1159 /* Note: 260 is the minimum HMAX in all implemented modes */ 1160 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); 1161 1162 /* invert v_pos if VFLIP */ 1163 v_pos = imx274->ctrls.vflip->cur.val ? 1164 (-imx274->crop.top / 2) : (imx274->crop.top / 2); 1165 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; 1166 write_v_size = imx274->crop.height + 22; 1167 y_out_size = imx274->crop.height + 14; 1168 1169 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); 1170 if (!err) 1171 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); 1172 if (!err) 1173 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, 1174 h_start, 2); 1175 if (!err) 1176 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, 1177 h_end, 2); 1178 if (!err) 1179 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); 1180 if (!err) 1181 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, 1182 v_cut, 2); 1183 if (!err) 1184 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, 1185 v_pos, 2); 1186 if (!err) 1187 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, 1188 write_v_size, 2); 1189 if (!err) 1190 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, 1191 y_out_size, 2); 1192 1193 return err; 1194 } 1195 1196 /** 1197 * imx274_g_frame_interval - Get the frame interval 1198 * @sd: Pointer to V4L2 Sub device structure 1199 * @fi: Pointer to V4l2 Sub device frame interval structure 1200 * 1201 * This function is used to get the frame interval. 1202 * 1203 * Return: 0 on success 1204 */ 1205 static int imx274_g_frame_interval(struct v4l2_subdev *sd, 1206 struct v4l2_subdev_frame_interval *fi) 1207 { 1208 struct stimx274 *imx274 = to_imx274(sd); 1209 1210 fi->interval = imx274->frame_interval; 1211 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", 1212 __func__, imx274->frame_interval.numerator, 1213 imx274->frame_interval.denominator); 1214 1215 return 0; 1216 } 1217 1218 /** 1219 * imx274_s_frame_interval - Set the frame interval 1220 * @sd: Pointer to V4L2 Sub device structure 1221 * @fi: Pointer to V4l2 Sub device frame interval structure 1222 * 1223 * This function is used to set the frame intervavl. 1224 * 1225 * Return: 0 on success 1226 */ 1227 static int imx274_s_frame_interval(struct v4l2_subdev *sd, 1228 struct v4l2_subdev_frame_interval *fi) 1229 { 1230 struct stimx274 *imx274 = to_imx274(sd); 1231 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; 1232 int min, max, def; 1233 int ret; 1234 1235 mutex_lock(&imx274->lock); 1236 ret = imx274_set_frame_interval(imx274, fi->interval); 1237 1238 if (!ret) { 1239 /* 1240 * exposure time range is decided by frame interval 1241 * need to update it after frame interval changes 1242 */ 1243 min = IMX274_MIN_EXPOSURE_TIME; 1244 max = fi->interval.numerator * 1000000 1245 / fi->interval.denominator; 1246 def = max; 1247 if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) { 1248 dev_err(&imx274->client->dev, 1249 "Exposure ctrl range update failed\n"); 1250 goto unlock; 1251 } 1252 1253 /* update exposure time accordingly */ 1254 imx274_set_exposure(imx274, ctrl->val); 1255 1256 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", 1257 fi->interval.numerator * 1000000 1258 / fi->interval.denominator); 1259 } 1260 1261 unlock: 1262 mutex_unlock(&imx274->lock); 1263 1264 return ret; 1265 } 1266 1267 /** 1268 * imx274_load_default - load default control values 1269 * @priv: Pointer to device structure 1270 * 1271 * Return: 0 on success, errors otherwise 1272 */ 1273 static int imx274_load_default(struct stimx274 *priv) 1274 { 1275 int ret; 1276 1277 /* load default control values */ 1278 priv->frame_interval.numerator = 1; 1279 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1280 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; 1281 priv->ctrls.gain->val = IMX274_DEF_GAIN; 1282 priv->ctrls.vflip->val = 0; 1283 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; 1284 1285 /* update frame rate */ 1286 ret = imx274_set_frame_interval(priv, 1287 priv->frame_interval); 1288 if (ret) 1289 return ret; 1290 1291 /* update exposure time */ 1292 ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val); 1293 if (ret) 1294 return ret; 1295 1296 /* update gain */ 1297 ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val); 1298 if (ret) 1299 return ret; 1300 1301 /* update vflip */ 1302 ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val); 1303 if (ret) 1304 return ret; 1305 1306 return 0; 1307 } 1308 1309 /** 1310 * imx274_s_stream - It is used to start/stop the streaming. 1311 * @sd: V4L2 Sub device 1312 * @on: Flag (True / False) 1313 * 1314 * This function controls the start or stop of streaming for the 1315 * imx274 sensor. 1316 * 1317 * Return: 0 on success, errors otherwise 1318 */ 1319 static int imx274_s_stream(struct v4l2_subdev *sd, int on) 1320 { 1321 struct stimx274 *imx274 = to_imx274(sd); 1322 int ret = 0; 1323 1324 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, 1325 on ? "Stream Start" : "Stream Stop", 1326 imx274->mode - &imx274_formats[0]); 1327 1328 mutex_lock(&imx274->lock); 1329 1330 if (on) { 1331 /* load mode registers */ 1332 ret = imx274_mode_regs(imx274); 1333 if (ret) 1334 goto fail; 1335 1336 ret = imx274_apply_trimming(imx274); 1337 if (ret) 1338 goto fail; 1339 1340 /* 1341 * update frame rate & expsoure. if the last mode is different, 1342 * HMAX could be changed. As the result, frame rate & exposure 1343 * are changed. 1344 * gain is not affected. 1345 */ 1346 ret = imx274_set_frame_interval(imx274, 1347 imx274->frame_interval); 1348 if (ret) 1349 goto fail; 1350 1351 /* update exposure time */ 1352 ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure, 1353 imx274->ctrls.exposure->val); 1354 if (ret) 1355 goto fail; 1356 1357 /* start stream */ 1358 ret = imx274_start_stream(imx274); 1359 if (ret) 1360 goto fail; 1361 } else { 1362 /* stop stream */ 1363 ret = imx274_write_table(imx274, imx274_stop); 1364 if (ret) 1365 goto fail; 1366 } 1367 1368 mutex_unlock(&imx274->lock); 1369 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); 1370 return 0; 1371 1372 fail: 1373 mutex_unlock(&imx274->lock); 1374 dev_err(&imx274->client->dev, "s_stream failed\n"); 1375 return ret; 1376 } 1377 1378 /* 1379 * imx274_get_frame_length - Function for obtaining current frame length 1380 * @priv: Pointer to device structure 1381 * @val: Pointer to obainted value 1382 * 1383 * frame_length = vmax x (svr + 1), in unit of hmax. 1384 * 1385 * Return: 0 on success 1386 */ 1387 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) 1388 { 1389 int err; 1390 u16 svr; 1391 u32 vmax; 1392 u8 reg_val[3]; 1393 1394 /* svr */ 1395 err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, ®_val[0]); 1396 if (err) 1397 goto fail; 1398 1399 err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_val[1]); 1400 if (err) 1401 goto fail; 1402 1403 svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; 1404 1405 /* vmax */ 1406 err = imx274_read_reg(priv, IMX274_VMAX_REG_3, ®_val[0]); 1407 if (err) 1408 goto fail; 1409 1410 err = imx274_read_reg(priv, IMX274_VMAX_REG_2, ®_val[1]); 1411 if (err) 1412 goto fail; 1413 1414 err = imx274_read_reg(priv, IMX274_VMAX_REG_1, ®_val[2]); 1415 if (err) 1416 goto fail; 1417 1418 vmax = ((reg_val[2] & IMX274_MASK_LSB_3_BITS) << IMX274_SHIFT_16_BITS) 1419 + (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; 1420 1421 *val = vmax * (svr + 1); 1422 1423 return 0; 1424 1425 fail: 1426 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1427 return err; 1428 } 1429 1430 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, 1431 u32 *frame_length) 1432 { 1433 int err; 1434 1435 err = imx274_get_frame_length(priv, frame_length); 1436 if (err) 1437 return err; 1438 1439 if (*frame_length < priv->mode->min_frame_len) 1440 *frame_length = priv->mode->min_frame_len; 1441 1442 *val = *frame_length - *val; /* convert to raw shr */ 1443 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) 1444 *val = *frame_length - IMX274_SHR_LIMIT_CONST; 1445 else if (*val < priv->mode->min_SHR) 1446 *val = priv->mode->min_SHR; 1447 1448 return 0; 1449 } 1450 1451 /* 1452 * imx274_set_digital gain - Function called when setting digital gain 1453 * @priv: Pointer to device structure 1454 * @dgain: Value of digital gain. 1455 * 1456 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x 1457 * 1458 * Return: 0 on success 1459 */ 1460 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) 1461 { 1462 u8 reg_val; 1463 1464 reg_val = ffs(dgain); 1465 1466 if (reg_val) 1467 reg_val--; 1468 1469 reg_val = clamp(reg_val, (u8)0, (u8)3); 1470 1471 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, 1472 reg_val & IMX274_MASK_LSB_4_BITS); 1473 } 1474 1475 /* 1476 * imx274_set_gain - Function called when setting gain 1477 * @priv: Pointer to device structure 1478 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; 1479 * @ctrl: v4l2 control pointer 1480 * 1481 * Set the gain based on input value. 1482 * The caller should hold the mutex lock imx274->lock if necessary 1483 * 1484 * Return: 0 on success 1485 */ 1486 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) 1487 { 1488 int err; 1489 u32 gain, analog_gain, digital_gain, gain_reg; 1490 1491 gain = (u32)(ctrl->val); 1492 1493 dev_dbg(&priv->client->dev, 1494 "%s : input gain = %d.%d\n", __func__, 1495 gain >> IMX274_GAIN_SHIFT, 1496 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); 1497 1498 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) 1499 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; 1500 else if (gain < IMX274_MIN_GAIN) 1501 gain = IMX274_MIN_GAIN; 1502 1503 if (gain <= IMX274_MAX_ANALOG_GAIN) 1504 digital_gain = 1; 1505 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) 1506 digital_gain = 2; 1507 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) 1508 digital_gain = 4; 1509 else 1510 digital_gain = IMX274_MAX_DIGITAL_GAIN; 1511 1512 analog_gain = gain / digital_gain; 1513 1514 dev_dbg(&priv->client->dev, 1515 "%s : digital gain = %d, analog gain = %d.%d\n", 1516 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, 1517 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) 1518 >> IMX274_GAIN_SHIFT); 1519 1520 err = imx274_set_digital_gain(priv, digital_gain); 1521 if (err) 1522 goto fail; 1523 1524 /* convert to register value, refer to imx274 datasheet */ 1525 gain_reg = (u32)IMX274_GAIN_CONST - 1526 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; 1527 if (gain_reg > IMX274_GAIN_REG_MAX) 1528 gain_reg = IMX274_GAIN_REG_MAX; 1529 1530 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 1531 2); 1532 if (err) 1533 goto fail; 1534 1535 if (IMX274_GAIN_CONST - gain_reg == 0) { 1536 err = -EINVAL; 1537 goto fail; 1538 } 1539 1540 /* convert register value back to gain value */ 1541 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) 1542 / (IMX274_GAIN_CONST - gain_reg) * digital_gain; 1543 1544 dev_dbg(&priv->client->dev, 1545 "%s : GAIN control success, gain_reg = %d, new gain = %d\n", 1546 __func__, gain_reg, ctrl->val); 1547 1548 return 0; 1549 1550 fail: 1551 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1552 return err; 1553 } 1554 1555 /* 1556 * imx274_set_coarse_time - Function called when setting SHR value 1557 * @priv: Pointer to device structure 1558 * @val: Value for exposure time in number of line_length, or [HMAX] 1559 * 1560 * Set SHR value based on input value. 1561 * 1562 * Return: 0 on success 1563 */ 1564 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) 1565 { 1566 int err; 1567 u32 coarse_time, frame_length; 1568 1569 coarse_time = *val; 1570 1571 /* convert exposure_time to appropriate SHR value */ 1572 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); 1573 if (err) 1574 goto fail; 1575 1576 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); 1577 if (err) 1578 goto fail; 1579 1580 *val = frame_length - coarse_time; 1581 return 0; 1582 1583 fail: 1584 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1585 return err; 1586 } 1587 1588 /* 1589 * imx274_set_exposure - Function called when setting exposure time 1590 * @priv: Pointer to device structure 1591 * @val: Variable for exposure time, in the unit of micro-second 1592 * 1593 * Set exposure time based on input value. 1594 * The caller should hold the mutex lock imx274->lock if necessary 1595 * 1596 * Return: 0 on success 1597 */ 1598 static int imx274_set_exposure(struct stimx274 *priv, int val) 1599 { 1600 int err; 1601 u16 hmax; 1602 u8 reg_val[2]; 1603 u32 coarse_time; /* exposure time in unit of line (HMAX)*/ 1604 1605 dev_dbg(&priv->client->dev, 1606 "%s : EXPOSURE control input = %d\n", __func__, val); 1607 1608 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ 1609 1610 /* obtain HMAX value */ 1611 err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, ®_val[0]); 1612 if (err) 1613 goto fail; 1614 err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, ®_val[1]); 1615 if (err) 1616 goto fail; 1617 hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; 1618 if (hmax == 0) { 1619 err = -EINVAL; 1620 goto fail; 1621 } 1622 1623 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val 1624 - priv->mode->nocpiop) / hmax; 1625 1626 /* step 2: convert exposure_time into SHR value */ 1627 1628 /* set SHR */ 1629 err = imx274_set_coarse_time(priv, &coarse_time); 1630 if (err) 1631 goto fail; 1632 1633 priv->ctrls.exposure->val = 1634 (coarse_time * hmax + priv->mode->nocpiop) 1635 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); 1636 1637 dev_dbg(&priv->client->dev, 1638 "%s : EXPOSURE control success\n", __func__); 1639 return 0; 1640 1641 fail: 1642 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1643 1644 return err; 1645 } 1646 1647 /* 1648 * imx274_set_vflip - Function called when setting vertical flip 1649 * @priv: Pointer to device structure 1650 * @val: Value for vflip setting 1651 * 1652 * Set vertical flip based on input value. 1653 * val = 0: normal, no vertical flip 1654 * val = 1: vertical flip enabled 1655 * The caller should hold the mutex lock imx274->lock if necessary 1656 * 1657 * Return: 0 on success 1658 */ 1659 static int imx274_set_vflip(struct stimx274 *priv, int val) 1660 { 1661 int err; 1662 1663 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); 1664 if (err) { 1665 dev_err(&priv->client->dev, "VFLIP control error\n"); 1666 return err; 1667 } 1668 1669 dev_dbg(&priv->client->dev, 1670 "%s : VFLIP control success\n", __func__); 1671 1672 return 0; 1673 } 1674 1675 /* 1676 * imx274_set_test_pattern - Function called when setting test pattern 1677 * @priv: Pointer to device structure 1678 * @val: Variable for test pattern 1679 * 1680 * Set to different test patterns based on input value. 1681 * 1682 * Return: 0 on success 1683 */ 1684 static int imx274_set_test_pattern(struct stimx274 *priv, int val) 1685 { 1686 int err = 0; 1687 1688 if (val == TEST_PATTERN_DISABLED) { 1689 err = imx274_write_table(priv, imx274_tp_disabled); 1690 } else if (val <= TEST_PATTERN_V_COLOR_BARS) { 1691 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); 1692 if (!err) 1693 err = imx274_write_table(priv, imx274_tp_regs); 1694 } else { 1695 err = -EINVAL; 1696 } 1697 1698 if (!err) 1699 dev_dbg(&priv->client->dev, 1700 "%s : TEST PATTERN control success\n", __func__); 1701 else 1702 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1703 1704 return err; 1705 } 1706 1707 /* 1708 * imx274_set_frame_length - Function called when setting frame length 1709 * @priv: Pointer to device structure 1710 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) 1711 * 1712 * Set frame length based on input value. 1713 * 1714 * Return: 0 on success 1715 */ 1716 static int imx274_set_frame_length(struct stimx274 *priv, u32 val) 1717 { 1718 int err; 1719 u32 frame_length; 1720 1721 dev_dbg(&priv->client->dev, "%s : input length = %d\n", 1722 __func__, val); 1723 1724 frame_length = (u32)val; 1725 1726 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); 1727 if (err) 1728 goto fail; 1729 1730 return 0; 1731 1732 fail: 1733 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1734 return err; 1735 } 1736 1737 /* 1738 * imx274_set_frame_interval - Function called when setting frame interval 1739 * @priv: Pointer to device structure 1740 * @frame_interval: Variable for frame interval 1741 * 1742 * Change frame interval by updating VMAX value 1743 * The caller should hold the mutex lock imx274->lock if necessary 1744 * 1745 * Return: 0 on success 1746 */ 1747 static int imx274_set_frame_interval(struct stimx274 *priv, 1748 struct v4l2_fract frame_interval) 1749 { 1750 int err; 1751 u32 frame_length, req_frame_rate; 1752 u16 svr; 1753 u16 hmax; 1754 u8 reg_val[2]; 1755 1756 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", 1757 __func__, frame_interval.numerator, 1758 frame_interval.denominator); 1759 1760 if (frame_interval.numerator == 0) { 1761 err = -EINVAL; 1762 goto fail; 1763 } 1764 1765 req_frame_rate = (u32)(frame_interval.denominator 1766 / frame_interval.numerator); 1767 1768 /* boundary check */ 1769 if (req_frame_rate > priv->mode->max_fps) { 1770 frame_interval.numerator = 1; 1771 frame_interval.denominator = priv->mode->max_fps; 1772 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { 1773 frame_interval.numerator = 1; 1774 frame_interval.denominator = IMX274_MIN_FRAME_RATE; 1775 } 1776 1777 /* 1778 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX 1779 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX 1780 */ 1781 1782 /* SVR */ 1783 err = imx274_read_reg(priv, IMX274_SVR_REG_LSB, ®_val[0]); 1784 if (err) 1785 goto fail; 1786 err = imx274_read_reg(priv, IMX274_SVR_REG_MSB, ®_val[1]); 1787 if (err) 1788 goto fail; 1789 svr = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; 1790 dev_dbg(&priv->client->dev, 1791 "%s : register SVR = %d\n", __func__, svr); 1792 1793 /* HMAX */ 1794 err = imx274_read_reg(priv, IMX274_HMAX_REG_LSB, ®_val[0]); 1795 if (err) 1796 goto fail; 1797 err = imx274_read_reg(priv, IMX274_HMAX_REG_MSB, ®_val[1]); 1798 if (err) 1799 goto fail; 1800 hmax = (reg_val[1] << IMX274_SHIFT_8_BITS) + reg_val[0]; 1801 dev_dbg(&priv->client->dev, 1802 "%s : register HMAX = %d\n", __func__, hmax); 1803 1804 if (hmax == 0 || frame_interval.denominator == 0) { 1805 err = -EINVAL; 1806 goto fail; 1807 } 1808 1809 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax 1810 * frame_interval.numerator 1811 / frame_interval.denominator; 1812 1813 err = imx274_set_frame_length(priv, frame_length); 1814 if (err) 1815 goto fail; 1816 1817 priv->frame_interval = frame_interval; 1818 return 0; 1819 1820 fail: 1821 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1822 return err; 1823 } 1824 1825 static const struct v4l2_subdev_pad_ops imx274_pad_ops = { 1826 .get_fmt = imx274_get_fmt, 1827 .set_fmt = imx274_set_fmt, 1828 .get_selection = imx274_get_selection, 1829 .set_selection = imx274_set_selection, 1830 }; 1831 1832 static const struct v4l2_subdev_video_ops imx274_video_ops = { 1833 .g_frame_interval = imx274_g_frame_interval, 1834 .s_frame_interval = imx274_s_frame_interval, 1835 .s_stream = imx274_s_stream, 1836 }; 1837 1838 static const struct v4l2_subdev_ops imx274_subdev_ops = { 1839 .pad = &imx274_pad_ops, 1840 .video = &imx274_video_ops, 1841 }; 1842 1843 static const struct v4l2_ctrl_ops imx274_ctrl_ops = { 1844 .s_ctrl = imx274_s_ctrl, 1845 }; 1846 1847 static const struct of_device_id imx274_of_id_table[] = { 1848 { .compatible = "sony,imx274" }, 1849 { } 1850 }; 1851 MODULE_DEVICE_TABLE(of, imx274_of_id_table); 1852 1853 static const struct i2c_device_id imx274_id[] = { 1854 { "IMX274", 0 }, 1855 { } 1856 }; 1857 MODULE_DEVICE_TABLE(i2c, imx274_id); 1858 1859 static int imx274_probe(struct i2c_client *client, 1860 const struct i2c_device_id *id) 1861 { 1862 struct v4l2_subdev *sd; 1863 struct stimx274 *imx274; 1864 int ret; 1865 1866 /* initialize imx274 */ 1867 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL); 1868 if (!imx274) 1869 return -ENOMEM; 1870 1871 mutex_init(&imx274->lock); 1872 1873 /* initialize format */ 1874 imx274->mode = &imx274_formats[IMX274_DEFAULT_MODE]; 1875 imx274->crop.width = IMX274_MAX_WIDTH; 1876 imx274->crop.height = IMX274_MAX_HEIGHT; 1877 imx274->format.width = imx274->crop.width / imx274->mode->bin_ratio; 1878 imx274->format.height = imx274->crop.height / imx274->mode->bin_ratio; 1879 imx274->format.field = V4L2_FIELD_NONE; 1880 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; 1881 imx274->format.colorspace = V4L2_COLORSPACE_SRGB; 1882 imx274->frame_interval.numerator = 1; 1883 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1884 1885 /* initialize regmap */ 1886 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); 1887 if (IS_ERR(imx274->regmap)) { 1888 dev_err(&client->dev, 1889 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); 1890 ret = -ENODEV; 1891 goto err_regmap; 1892 } 1893 1894 /* initialize subdevice */ 1895 imx274->client = client; 1896 sd = &imx274->sd; 1897 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); 1898 strlcpy(sd->name, DRIVER_NAME, sizeof(sd->name)); 1899 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1900 1901 /* initialize subdev media pad */ 1902 imx274->pad.flags = MEDIA_PAD_FL_SOURCE; 1903 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1904 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); 1905 if (ret < 0) { 1906 dev_err(&client->dev, 1907 "%s : media entity init Failed %d\n", __func__, ret); 1908 goto err_regmap; 1909 } 1910 1911 /* initialize sensor reset gpio */ 1912 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 1913 GPIOD_OUT_HIGH); 1914 if (IS_ERR(imx274->reset_gpio)) { 1915 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) 1916 dev_err(&client->dev, "Reset GPIO not setup in DT"); 1917 ret = PTR_ERR(imx274->reset_gpio); 1918 goto err_me; 1919 } 1920 1921 /* pull sensor out of reset */ 1922 imx274_reset(imx274, 1); 1923 1924 /* initialize controls */ 1925 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 2); 1926 if (ret < 0) { 1927 dev_err(&client->dev, 1928 "%s : ctrl handler init Failed\n", __func__); 1929 goto err_me; 1930 } 1931 1932 imx274->ctrls.handler.lock = &imx274->lock; 1933 1934 /* add new controls */ 1935 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( 1936 &imx274->ctrls.handler, &imx274_ctrl_ops, 1937 V4L2_CID_TEST_PATTERN, 1938 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); 1939 1940 imx274->ctrls.gain = v4l2_ctrl_new_std( 1941 &imx274->ctrls.handler, 1942 &imx274_ctrl_ops, 1943 V4L2_CID_GAIN, IMX274_MIN_GAIN, 1944 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, 1945 IMX274_DEF_GAIN); 1946 1947 imx274->ctrls.exposure = v4l2_ctrl_new_std( 1948 &imx274->ctrls.handler, 1949 &imx274_ctrl_ops, 1950 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 1951 1000000 / IMX274_DEF_FRAME_RATE, 1, 1952 IMX274_MIN_EXPOSURE_TIME); 1953 1954 imx274->ctrls.vflip = v4l2_ctrl_new_std( 1955 &imx274->ctrls.handler, 1956 &imx274_ctrl_ops, 1957 V4L2_CID_VFLIP, 0, 1, 1, 0); 1958 1959 imx274->sd.ctrl_handler = &imx274->ctrls.handler; 1960 if (imx274->ctrls.handler.error) { 1961 ret = imx274->ctrls.handler.error; 1962 goto err_ctrls; 1963 } 1964 1965 /* setup default controls */ 1966 ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler); 1967 if (ret) { 1968 dev_err(&client->dev, 1969 "Error %d setup default controls\n", ret); 1970 goto err_ctrls; 1971 } 1972 1973 /* load default control values */ 1974 ret = imx274_load_default(imx274); 1975 if (ret) { 1976 dev_err(&client->dev, 1977 "%s : imx274_load_default failed %d\n", 1978 __func__, ret); 1979 goto err_ctrls; 1980 } 1981 1982 /* register subdevice */ 1983 ret = v4l2_async_register_subdev(sd); 1984 if (ret < 0) { 1985 dev_err(&client->dev, 1986 "%s : v4l2_async_register_subdev failed %d\n", 1987 __func__, ret); 1988 goto err_ctrls; 1989 } 1990 1991 dev_info(&client->dev, "imx274 : imx274 probe success !\n"); 1992 return 0; 1993 1994 err_ctrls: 1995 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 1996 err_me: 1997 media_entity_cleanup(&sd->entity); 1998 err_regmap: 1999 mutex_destroy(&imx274->lock); 2000 return ret; 2001 } 2002 2003 static int imx274_remove(struct i2c_client *client) 2004 { 2005 struct v4l2_subdev *sd = i2c_get_clientdata(client); 2006 struct stimx274 *imx274 = to_imx274(sd); 2007 2008 /* stop stream */ 2009 imx274_write_table(imx274, imx274_stop); 2010 2011 v4l2_async_unregister_subdev(sd); 2012 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 2013 media_entity_cleanup(&sd->entity); 2014 mutex_destroy(&imx274->lock); 2015 return 0; 2016 } 2017 2018 static struct i2c_driver imx274_i2c_driver = { 2019 .driver = { 2020 .name = DRIVER_NAME, 2021 .of_match_table = imx274_of_id_table, 2022 }, 2023 .probe = imx274_probe, 2024 .remove = imx274_remove, 2025 .id_table = imx274_id, 2026 }; 2027 2028 module_i2c_driver(imx274_i2c_driver); 2029 2030 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); 2031 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); 2032 MODULE_LICENSE("GPL v2"); 2033