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/regmap.h> 22 #include <linux/slab.h> 23 #include <linux/v4l2-mediabus.h> 24 #include <linux/videodev2.h> 25 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-subdev.h> 29 30 /* 31 * See "SHR, SVR Setting" in datasheet 32 */ 33 #define IMX274_DEFAULT_FRAME_LENGTH (4550) 34 #define IMX274_MAX_FRAME_LENGTH (0x000fffff) 35 36 /* 37 * See "Frame Rate Adjustment" in datasheet 38 */ 39 #define IMX274_PIXCLK_CONST1 (72000000) 40 #define IMX274_PIXCLK_CONST2 (1000000) 41 42 /* 43 * The input gain is shifted by IMX274_GAIN_SHIFT to get 44 * decimal number. The real gain is 45 * (float)input_gain_value / (1 << IMX274_GAIN_SHIFT) 46 */ 47 #define IMX274_GAIN_SHIFT (8) 48 #define IMX274_GAIN_SHIFT_MASK ((1 << IMX274_GAIN_SHIFT) - 1) 49 50 /* 51 * See "Analog Gain" and "Digital Gain" in datasheet 52 * min gain is 1X 53 * max gain is calculated based on IMX274_GAIN_REG_MAX 54 */ 55 #define IMX274_GAIN_REG_MAX (1957) 56 #define IMX274_MIN_GAIN (0x01 << IMX274_GAIN_SHIFT) 57 #define IMX274_MAX_ANALOG_GAIN ((2048 << IMX274_GAIN_SHIFT)\ 58 / (2048 - IMX274_GAIN_REG_MAX)) 59 #define IMX274_MAX_DIGITAL_GAIN (8) 60 #define IMX274_DEF_GAIN (20 << IMX274_GAIN_SHIFT) 61 #define IMX274_GAIN_CONST (2048) /* for gain formula */ 62 63 /* 64 * 1 line time in us = (HMAX / 72), minimal is 4 lines 65 */ 66 #define IMX274_MIN_EXPOSURE_TIME (4 * 260 / 72) 67 68 #define IMX274_DEFAULT_BINNING IMX274_BINNING_OFF 69 #define IMX274_MAX_WIDTH (3840) 70 #define IMX274_MAX_HEIGHT (2160) 71 #define IMX274_MAX_FRAME_RATE (120) 72 #define IMX274_MIN_FRAME_RATE (5) 73 #define IMX274_DEF_FRAME_RATE (60) 74 75 /* 76 * register SHR is limited to (SVR value + 1) x VMAX value - 4 77 */ 78 #define IMX274_SHR_LIMIT_CONST (4) 79 80 /* 81 * Min and max sensor reset delay (microseconds) 82 */ 83 #define IMX274_RESET_DELAY1 (2000) 84 #define IMX274_RESET_DELAY2 (2200) 85 86 /* 87 * shift and mask constants 88 */ 89 #define IMX274_SHIFT_8_BITS (8) 90 #define IMX274_SHIFT_16_BITS (16) 91 #define IMX274_MASK_LSB_2_BITS (0x03) 92 #define IMX274_MASK_LSB_3_BITS (0x07) 93 #define IMX274_MASK_LSB_4_BITS (0x0f) 94 #define IMX274_MASK_LSB_8_BITS (0x00ff) 95 96 #define DRIVER_NAME "IMX274" 97 98 /* 99 * IMX274 register definitions 100 */ 101 #define IMX274_SHR_REG_MSB 0x300D /* SHR */ 102 #define IMX274_SHR_REG_LSB 0x300C /* SHR */ 103 #define IMX274_SVR_REG_MSB 0x300F /* SVR */ 104 #define IMX274_SVR_REG_LSB 0x300E /* SVR */ 105 #define IMX274_HTRIM_EN_REG 0x3037 106 #define IMX274_HTRIM_START_REG_LSB 0x3038 107 #define IMX274_HTRIM_START_REG_MSB 0x3039 108 #define IMX274_HTRIM_END_REG_LSB 0x303A 109 #define IMX274_HTRIM_END_REG_MSB 0x303B 110 #define IMX274_VWIDCUTEN_REG 0x30DD 111 #define IMX274_VWIDCUT_REG_LSB 0x30DE 112 #define IMX274_VWIDCUT_REG_MSB 0x30DF 113 #define IMX274_VWINPOS_REG_LSB 0x30E0 114 #define IMX274_VWINPOS_REG_MSB 0x30E1 115 #define IMX274_WRITE_VSIZE_REG_LSB 0x3130 116 #define IMX274_WRITE_VSIZE_REG_MSB 0x3131 117 #define IMX274_Y_OUT_SIZE_REG_LSB 0x3132 118 #define IMX274_Y_OUT_SIZE_REG_MSB 0x3133 119 #define IMX274_VMAX_REG_1 0x30FA /* VMAX, MSB */ 120 #define IMX274_VMAX_REG_2 0x30F9 /* VMAX */ 121 #define IMX274_VMAX_REG_3 0x30F8 /* VMAX, LSB */ 122 #define IMX274_HMAX_REG_MSB 0x30F7 /* HMAX */ 123 #define IMX274_HMAX_REG_LSB 0x30F6 /* HMAX */ 124 #define IMX274_ANALOG_GAIN_ADDR_LSB 0x300A /* ANALOG GAIN LSB */ 125 #define IMX274_ANALOG_GAIN_ADDR_MSB 0x300B /* ANALOG GAIN MSB */ 126 #define IMX274_DIGITAL_GAIN_REG 0x3012 /* Digital Gain */ 127 #define IMX274_VFLIP_REG 0x301A /* VERTICAL FLIP */ 128 #define IMX274_TEST_PATTERN_REG 0x303D /* TEST PATTERN */ 129 #define IMX274_STANDBY_REG 0x3000 /* STANDBY */ 130 131 #define IMX274_TABLE_WAIT_MS 0 132 #define IMX274_TABLE_END 1 133 134 /* 135 * imx274 I2C operation related structure 136 */ 137 struct reg_8 { 138 u16 addr; 139 u8 val; 140 }; 141 142 static const struct regmap_config imx274_regmap_config = { 143 .reg_bits = 16, 144 .val_bits = 8, 145 .cache_type = REGCACHE_RBTREE, 146 }; 147 148 enum imx274_binning { 149 IMX274_BINNING_OFF, 150 IMX274_BINNING_2_1, 151 IMX274_BINNING_3_1, 152 }; 153 154 /* 155 * Parameters for each imx274 readout mode. 156 * 157 * These are the values to configure the sensor in one of the 158 * implemented modes. 159 * 160 * @init_regs: registers to initialize the mode 161 * @bin_ratio: downscale factor (e.g. 3 for 3:1 binning) 162 * @min_frame_len: Minimum frame length for each mode (see "Frame Rate 163 * Adjustment (CSI-2)" in the datasheet) 164 * @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the 165 * datasheet) 166 * @max_fps: Maximum frames per second 167 * @nocpiop: Number of clocks per internal offset period (see "Integration Time 168 * in Each Readout Drive Mode (CSI-2)" in the datasheet) 169 */ 170 struct imx274_mode { 171 const struct reg_8 *init_regs; 172 unsigned int bin_ratio; 173 int min_frame_len; 174 int min_SHR; 175 int max_fps; 176 int nocpiop; 177 }; 178 179 /* 180 * imx274 test pattern related structure 181 */ 182 enum { 183 TEST_PATTERN_DISABLED = 0, 184 TEST_PATTERN_ALL_000H, 185 TEST_PATTERN_ALL_FFFH, 186 TEST_PATTERN_ALL_555H, 187 TEST_PATTERN_ALL_AAAH, 188 TEST_PATTERN_VSP_5AH, /* VERTICAL STRIPE PATTERN 555H/AAAH */ 189 TEST_PATTERN_VSP_A5H, /* VERTICAL STRIPE PATTERN AAAH/555H */ 190 TEST_PATTERN_VSP_05H, /* VERTICAL STRIPE PATTERN 000H/555H */ 191 TEST_PATTERN_VSP_50H, /* VERTICAL STRIPE PATTERN 555H/000H */ 192 TEST_PATTERN_VSP_0FH, /* VERTICAL STRIPE PATTERN 000H/FFFH */ 193 TEST_PATTERN_VSP_F0H, /* VERTICAL STRIPE PATTERN FFFH/000H */ 194 TEST_PATTERN_H_COLOR_BARS, 195 TEST_PATTERN_V_COLOR_BARS, 196 }; 197 198 static const char * const tp_qmenu[] = { 199 "Disabled", 200 "All 000h Pattern", 201 "All FFFh Pattern", 202 "All 555h Pattern", 203 "All AAAh Pattern", 204 "Vertical Stripe (555h / AAAh)", 205 "Vertical Stripe (AAAh / 555h)", 206 "Vertical Stripe (000h / 555h)", 207 "Vertical Stripe (555h / 000h)", 208 "Vertical Stripe (000h / FFFh)", 209 "Vertical Stripe (FFFh / 000h)", 210 "Horizontal Color Bars", 211 "Vertical Color Bars", 212 }; 213 214 /* 215 * All-pixel scan mode (10-bit) 216 * imx274 mode1(refer to datasheet) register configuration with 217 * 3840x2160 resolution, raw10 data and mipi four lane output 218 */ 219 static const struct reg_8 imx274_mode1_3840x2160_raw10[] = { 220 {0x3004, 0x01}, 221 {0x3005, 0x01}, 222 {0x3006, 0x00}, 223 {0x3007, 0xa2}, 224 225 {0x3018, 0xA2}, /* output XVS, HVS */ 226 227 {0x306B, 0x05}, 228 {0x30E2, 0x01}, 229 230 {0x30EE, 0x01}, 231 {0x3342, 0x0A}, 232 {0x3343, 0x00}, 233 {0x3344, 0x16}, 234 {0x3345, 0x00}, 235 {0x33A6, 0x01}, 236 {0x3528, 0x0E}, 237 {0x3554, 0x1F}, 238 {0x3555, 0x01}, 239 {0x3556, 0x01}, 240 {0x3557, 0x01}, 241 {0x3558, 0x01}, 242 {0x3559, 0x00}, 243 {0x355A, 0x00}, 244 {0x35BA, 0x0E}, 245 {0x366A, 0x1B}, 246 {0x366B, 0x1A}, 247 {0x366C, 0x19}, 248 {0x366D, 0x17}, 249 {0x3A41, 0x08}, 250 251 {IMX274_TABLE_END, 0x00} 252 }; 253 254 /* 255 * Horizontal/vertical 2/2-line binning 256 * (Horizontal and vertical weightedbinning, 10-bit) 257 * imx274 mode3(refer to datasheet) register configuration with 258 * 1920x1080 resolution, raw10 data and mipi four lane output 259 */ 260 static const struct reg_8 imx274_mode3_1920x1080_raw10[] = { 261 {0x3004, 0x02}, 262 {0x3005, 0x21}, 263 {0x3006, 0x00}, 264 {0x3007, 0xb1}, 265 266 {0x3018, 0xA2}, /* output XVS, HVS */ 267 268 {0x306B, 0x05}, 269 {0x30E2, 0x02}, 270 271 {0x30EE, 0x01}, 272 {0x3342, 0x0A}, 273 {0x3343, 0x00}, 274 {0x3344, 0x1A}, 275 {0x3345, 0x00}, 276 {0x33A6, 0x01}, 277 {0x3528, 0x0E}, 278 {0x3554, 0x00}, 279 {0x3555, 0x01}, 280 {0x3556, 0x01}, 281 {0x3557, 0x01}, 282 {0x3558, 0x01}, 283 {0x3559, 0x00}, 284 {0x355A, 0x00}, 285 {0x35BA, 0x0E}, 286 {0x366A, 0x1B}, 287 {0x366B, 0x1A}, 288 {0x366C, 0x19}, 289 {0x366D, 0x17}, 290 {0x3A41, 0x08}, 291 292 {IMX274_TABLE_END, 0x00} 293 }; 294 295 /* 296 * Vertical 2/3 subsampling binning horizontal 3 binning 297 * imx274 mode5(refer to datasheet) register configuration with 298 * 1280x720 resolution, raw10 data and mipi four lane output 299 */ 300 static const struct reg_8 imx274_mode5_1280x720_raw10[] = { 301 {0x3004, 0x03}, 302 {0x3005, 0x31}, 303 {0x3006, 0x00}, 304 {0x3007, 0xa9}, 305 306 {0x3018, 0xA2}, /* output XVS, HVS */ 307 308 {0x306B, 0x05}, 309 {0x30E2, 0x03}, 310 311 {0x30EE, 0x01}, 312 {0x3342, 0x0A}, 313 {0x3343, 0x00}, 314 {0x3344, 0x1B}, 315 {0x3345, 0x00}, 316 {0x33A6, 0x01}, 317 {0x3528, 0x0E}, 318 {0x3554, 0x00}, 319 {0x3555, 0x01}, 320 {0x3556, 0x01}, 321 {0x3557, 0x01}, 322 {0x3558, 0x01}, 323 {0x3559, 0x00}, 324 {0x355A, 0x00}, 325 {0x35BA, 0x0E}, 326 {0x366A, 0x1B}, 327 {0x366B, 0x19}, 328 {0x366C, 0x17}, 329 {0x366D, 0x17}, 330 {0x3A41, 0x04}, 331 332 {IMX274_TABLE_END, 0x00} 333 }; 334 335 /* 336 * imx274 first step register configuration for 337 * starting stream 338 */ 339 static const struct reg_8 imx274_start_1[] = { 340 {IMX274_STANDBY_REG, 0x12}, 341 342 /* PLRD: clock settings */ 343 {0x3120, 0xF0}, 344 {0x3121, 0x00}, 345 {0x3122, 0x02}, 346 {0x3129, 0x9C}, 347 {0x312A, 0x02}, 348 {0x312D, 0x02}, 349 350 {0x310B, 0x00}, 351 352 /* PLSTMG */ 353 {0x304C, 0x00}, /* PLSTMG01 */ 354 {0x304D, 0x03}, 355 {0x331C, 0x1A}, 356 {0x331D, 0x00}, 357 {0x3502, 0x02}, 358 {0x3529, 0x0E}, 359 {0x352A, 0x0E}, 360 {0x352B, 0x0E}, 361 {0x3538, 0x0E}, 362 {0x3539, 0x0E}, 363 {0x3553, 0x00}, 364 {0x357D, 0x05}, 365 {0x357F, 0x05}, 366 {0x3581, 0x04}, 367 {0x3583, 0x76}, 368 {0x3587, 0x01}, 369 {0x35BB, 0x0E}, 370 {0x35BC, 0x0E}, 371 {0x35BD, 0x0E}, 372 {0x35BE, 0x0E}, 373 {0x35BF, 0x0E}, 374 {0x366E, 0x00}, 375 {0x366F, 0x00}, 376 {0x3670, 0x00}, 377 {0x3671, 0x00}, 378 379 /* PSMIPI */ 380 {0x3304, 0x32}, /* PSMIPI1 */ 381 {0x3305, 0x00}, 382 {0x3306, 0x32}, 383 {0x3307, 0x00}, 384 {0x3590, 0x32}, 385 {0x3591, 0x00}, 386 {0x3686, 0x32}, 387 {0x3687, 0x00}, 388 389 {IMX274_TABLE_END, 0x00} 390 }; 391 392 /* 393 * imx274 second step register configuration for 394 * starting stream 395 */ 396 static const struct reg_8 imx274_start_2[] = { 397 {IMX274_STANDBY_REG, 0x00}, 398 {0x303E, 0x02}, /* SYS_MODE = 2 */ 399 {IMX274_TABLE_END, 0x00} 400 }; 401 402 /* 403 * imx274 third step register configuration for 404 * starting stream 405 */ 406 static const struct reg_8 imx274_start_3[] = { 407 {0x30F4, 0x00}, 408 {0x3018, 0xA2}, /* XHS VHS OUTUPT */ 409 {IMX274_TABLE_END, 0x00} 410 }; 411 412 /* 413 * imx274 register configuration for stoping stream 414 */ 415 static const struct reg_8 imx274_stop[] = { 416 {IMX274_STANDBY_REG, 0x01}, 417 {IMX274_TABLE_END, 0x00} 418 }; 419 420 /* 421 * imx274 disable test pattern register configuration 422 */ 423 static const struct reg_8 imx274_tp_disabled[] = { 424 {0x303C, 0x00}, 425 {0x377F, 0x00}, 426 {0x3781, 0x00}, 427 {0x370B, 0x00}, 428 {IMX274_TABLE_END, 0x00} 429 }; 430 431 /* 432 * imx274 test pattern register configuration 433 * reg 0x303D defines the test pattern modes 434 */ 435 static const struct reg_8 imx274_tp_regs[] = { 436 {0x303C, 0x11}, 437 {0x370E, 0x01}, 438 {0x377F, 0x01}, 439 {0x3781, 0x01}, 440 {0x370B, 0x11}, 441 {IMX274_TABLE_END, 0x00} 442 }; 443 444 /* nocpiop happens to be the same number for the implemented modes */ 445 static const struct imx274_mode imx274_modes[] = { 446 { 447 /* mode 1, 4K */ 448 .bin_ratio = 1, 449 .init_regs = imx274_mode1_3840x2160_raw10, 450 .min_frame_len = 4550, 451 .min_SHR = 12, 452 .max_fps = 60, 453 .nocpiop = 112, 454 }, 455 { 456 /* mode 3, 1080p */ 457 .bin_ratio = 2, 458 .init_regs = imx274_mode3_1920x1080_raw10, 459 .min_frame_len = 2310, 460 .min_SHR = 8, 461 .max_fps = 120, 462 .nocpiop = 112, 463 }, 464 { 465 /* mode 5, 720p */ 466 .bin_ratio = 3, 467 .init_regs = imx274_mode5_1280x720_raw10, 468 .min_frame_len = 2310, 469 .min_SHR = 8, 470 .max_fps = 120, 471 .nocpiop = 112, 472 }, 473 }; 474 475 /* 476 * struct imx274_ctrls - imx274 ctrl structure 477 * @handler: V4L2 ctrl handler structure 478 * @exposure: Pointer to expsure ctrl structure 479 * @gain: Pointer to gain ctrl structure 480 * @vflip: Pointer to vflip ctrl structure 481 * @test_pattern: Pointer to test pattern ctrl structure 482 */ 483 struct imx274_ctrls { 484 struct v4l2_ctrl_handler handler; 485 struct v4l2_ctrl *exposure; 486 struct v4l2_ctrl *gain; 487 struct v4l2_ctrl *vflip; 488 struct v4l2_ctrl *test_pattern; 489 }; 490 491 /* 492 * struct stim274 - imx274 device structure 493 * @sd: V4L2 subdevice structure 494 * @pad: Media pad structure 495 * @client: Pointer to I2C client 496 * @ctrls: imx274 control structure 497 * @crop: rect to be captured 498 * @compose: compose rect, i.e. output resolution 499 * @format: V4L2 media bus frame format structure 500 * (width and height are in sync with the compose rect) 501 * @frame_rate: V4L2 frame rate structure 502 * @regmap: Pointer to regmap structure 503 * @reset_gpio: Pointer to reset gpio 504 * @lock: Mutex structure 505 * @mode: Parameters for the selected readout mode 506 */ 507 struct stimx274 { 508 struct v4l2_subdev sd; 509 struct media_pad pad; 510 struct i2c_client *client; 511 struct imx274_ctrls ctrls; 512 struct v4l2_rect crop; 513 struct v4l2_mbus_framefmt format; 514 struct v4l2_fract frame_interval; 515 struct regmap *regmap; 516 struct gpio_desc *reset_gpio; 517 struct mutex lock; /* mutex lock for operations */ 518 const struct imx274_mode *mode; 519 }; 520 521 #define IMX274_ROUND(dim, step, flags) \ 522 ((flags) & V4L2_SEL_FLAG_GE \ 523 ? roundup((dim), (step)) \ 524 : ((flags) & V4L2_SEL_FLAG_LE \ 525 ? rounddown((dim), (step)) \ 526 : rounddown((dim) + (step) / 2, (step)))) 527 528 /* 529 * Function declaration 530 */ 531 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl); 532 static int imx274_set_exposure(struct stimx274 *priv, int val); 533 static int imx274_set_vflip(struct stimx274 *priv, int val); 534 static int imx274_set_test_pattern(struct stimx274 *priv, int val); 535 static int imx274_set_frame_interval(struct stimx274 *priv, 536 struct v4l2_fract frame_interval); 537 538 static inline void msleep_range(unsigned int delay_base) 539 { 540 usleep_range(delay_base * 1000, delay_base * 1000 + 500); 541 } 542 543 /* 544 * v4l2_ctrl and v4l2_subdev related operations 545 */ 546 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 547 { 548 return &container_of(ctrl->handler, 549 struct stimx274, ctrls.handler)->sd; 550 } 551 552 static inline struct stimx274 *to_imx274(struct v4l2_subdev *sd) 553 { 554 return container_of(sd, struct stimx274, sd); 555 } 556 557 /* 558 * Writing a register table 559 * 560 * @priv: Pointer to device 561 * @table: Table containing register values (with optional delays) 562 * 563 * This is used to write register table into sensor's reg map. 564 * 565 * Return: 0 on success, errors otherwise 566 */ 567 static int imx274_write_table(struct stimx274 *priv, const struct reg_8 table[]) 568 { 569 struct regmap *regmap = priv->regmap; 570 int err = 0; 571 const struct reg_8 *next; 572 u8 val; 573 574 int range_start = -1; 575 int range_count = 0; 576 u8 range_vals[16]; 577 int max_range_vals = ARRAY_SIZE(range_vals); 578 579 for (next = table;; next++) { 580 if ((next->addr != range_start + range_count) || 581 (next->addr == IMX274_TABLE_END) || 582 (next->addr == IMX274_TABLE_WAIT_MS) || 583 (range_count == max_range_vals)) { 584 if (range_count == 1) 585 err = regmap_write(regmap, 586 range_start, range_vals[0]); 587 else if (range_count > 1) 588 err = regmap_bulk_write(regmap, range_start, 589 &range_vals[0], 590 range_count); 591 else 592 err = 0; 593 594 if (err) 595 return err; 596 597 range_start = -1; 598 range_count = 0; 599 600 /* Handle special address values */ 601 if (next->addr == IMX274_TABLE_END) 602 break; 603 604 if (next->addr == IMX274_TABLE_WAIT_MS) { 605 msleep_range(next->val); 606 continue; 607 } 608 } 609 610 val = next->val; 611 612 if (range_start == -1) 613 range_start = next->addr; 614 615 range_vals[range_count++] = val; 616 } 617 return 0; 618 } 619 620 static inline int imx274_read_reg(struct stimx274 *priv, u16 addr, u8 *val) 621 { 622 int err; 623 624 err = regmap_read(priv->regmap, addr, (unsigned int *)val); 625 if (err) 626 dev_err(&priv->client->dev, 627 "%s : i2c read failed, addr = %x\n", __func__, addr); 628 else 629 dev_dbg(&priv->client->dev, 630 "%s : addr 0x%x, val=0x%x\n", __func__, 631 addr, *val); 632 return err; 633 } 634 635 static inline int imx274_write_reg(struct stimx274 *priv, u16 addr, u8 val) 636 { 637 int err; 638 639 err = regmap_write(priv->regmap, addr, val); 640 if (err) 641 dev_err(&priv->client->dev, 642 "%s : i2c write failed, %x = %x\n", __func__, 643 addr, val); 644 else 645 dev_dbg(&priv->client->dev, 646 "%s : addr 0x%x, val=0x%x\n", __func__, 647 addr, val); 648 return err; 649 } 650 651 /** 652 * Read a multibyte register. 653 * 654 * Uses a bulk read where possible. 655 * 656 * @priv: Pointer to device structure 657 * @addr: Address of the LSB register. Other registers must be 658 * consecutive, least-to-most significant. 659 * @val: Pointer to store the register value (cpu endianness) 660 * @nbytes: Number of bytes to read (range: [1..3]). 661 * Other bytes are zet to 0. 662 * 663 * Return: 0 on success, errors otherwise 664 */ 665 static int imx274_read_mbreg(struct stimx274 *priv, u16 addr, u32 *val, 666 size_t nbytes) 667 { 668 __le32 val_le = 0; 669 int err; 670 671 err = regmap_bulk_read(priv->regmap, addr, &val_le, nbytes); 672 if (err) { 673 dev_err(&priv->client->dev, 674 "%s : i2c bulk read failed, %x (%zu bytes)\n", 675 __func__, addr, nbytes); 676 } else { 677 *val = le32_to_cpu(val_le); 678 dev_dbg(&priv->client->dev, 679 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 680 __func__, addr, *val, nbytes); 681 } 682 683 return err; 684 } 685 686 /** 687 * Write a multibyte register. 688 * 689 * Uses a bulk write where possible. 690 * 691 * @priv: Pointer to device structure 692 * @addr: Address of the LSB register. Other registers must be 693 * consecutive, least-to-most significant. 694 * @val: Value to be written to the register (cpu endianness) 695 * @nbytes: Number of bytes to write (range: [1..3]) 696 */ 697 static int imx274_write_mbreg(struct stimx274 *priv, u16 addr, u32 val, 698 size_t nbytes) 699 { 700 __le32 val_le = cpu_to_le32(val); 701 int err; 702 703 err = regmap_bulk_write(priv->regmap, addr, &val_le, nbytes); 704 if (err) 705 dev_err(&priv->client->dev, 706 "%s : i2c bulk write failed, %x = %x (%zu bytes)\n", 707 __func__, addr, val, nbytes); 708 else 709 dev_dbg(&priv->client->dev, 710 "%s : addr 0x%x, val=0x%x (%zu bytes)\n", 711 __func__, addr, val, nbytes); 712 return err; 713 } 714 715 /* 716 * Set mode registers to start stream. 717 * @priv: Pointer to device structure 718 * 719 * Return: 0 on success, errors otherwise 720 */ 721 static int imx274_mode_regs(struct stimx274 *priv) 722 { 723 int err = 0; 724 725 err = imx274_write_table(priv, imx274_start_1); 726 if (err) 727 return err; 728 729 err = imx274_write_table(priv, priv->mode->init_regs); 730 731 return err; 732 } 733 734 /* 735 * imx274_start_stream - Function for starting stream per mode index 736 * @priv: Pointer to device structure 737 * 738 * Return: 0 on success, errors otherwise 739 */ 740 static int imx274_start_stream(struct stimx274 *priv) 741 { 742 int err = 0; 743 744 /* 745 * Refer to "Standby Cancel Sequence when using CSI-2" in 746 * imx274 datasheet, it should wait 10ms or more here. 747 * give it 1 extra ms for margin 748 */ 749 msleep_range(11); 750 err = imx274_write_table(priv, imx274_start_2); 751 if (err) 752 return err; 753 754 /* 755 * Refer to "Standby Cancel Sequence when using CSI-2" in 756 * imx274 datasheet, it should wait 7ms or more here. 757 * give it 1 extra ms for margin 758 */ 759 msleep_range(8); 760 err = imx274_write_table(priv, imx274_start_3); 761 if (err) 762 return err; 763 764 return 0; 765 } 766 767 /* 768 * imx274_reset - Function called to reset the sensor 769 * @priv: Pointer to device structure 770 * @rst: Input value for determining the sensor's end state after reset 771 * 772 * Set the senor in reset and then 773 * if rst = 0, keep it in reset; 774 * if rst = 1, bring it out of reset. 775 * 776 */ 777 static void imx274_reset(struct stimx274 *priv, int rst) 778 { 779 gpiod_set_value_cansleep(priv->reset_gpio, 0); 780 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 781 gpiod_set_value_cansleep(priv->reset_gpio, !!rst); 782 usleep_range(IMX274_RESET_DELAY1, IMX274_RESET_DELAY2); 783 } 784 785 /** 786 * imx274_s_ctrl - This is used to set the imx274 V4L2 controls 787 * @ctrl: V4L2 control to be set 788 * 789 * This function is used to set the V4L2 controls for the imx274 sensor. 790 * 791 * Return: 0 on success, errors otherwise 792 */ 793 static int imx274_s_ctrl(struct v4l2_ctrl *ctrl) 794 { 795 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 796 struct stimx274 *imx274 = to_imx274(sd); 797 int ret = -EINVAL; 798 799 dev_dbg(&imx274->client->dev, 800 "%s : s_ctrl: %s, value: %d\n", __func__, 801 ctrl->name, ctrl->val); 802 803 switch (ctrl->id) { 804 case V4L2_CID_EXPOSURE: 805 dev_dbg(&imx274->client->dev, 806 "%s : set V4L2_CID_EXPOSURE\n", __func__); 807 ret = imx274_set_exposure(imx274, ctrl->val); 808 break; 809 810 case V4L2_CID_GAIN: 811 dev_dbg(&imx274->client->dev, 812 "%s : set V4L2_CID_GAIN\n", __func__); 813 ret = imx274_set_gain(imx274, ctrl); 814 break; 815 816 case V4L2_CID_VFLIP: 817 dev_dbg(&imx274->client->dev, 818 "%s : set V4L2_CID_VFLIP\n", __func__); 819 ret = imx274_set_vflip(imx274, ctrl->val); 820 break; 821 822 case V4L2_CID_TEST_PATTERN: 823 dev_dbg(&imx274->client->dev, 824 "%s : set V4L2_CID_TEST_PATTERN\n", __func__); 825 ret = imx274_set_test_pattern(imx274, ctrl->val); 826 break; 827 } 828 829 return ret; 830 } 831 832 static int imx274_binning_goodness(struct stimx274 *imx274, 833 int w, int ask_w, 834 int h, int ask_h, u32 flags) 835 { 836 struct device *dev = &imx274->client->dev; 837 const int goodness = 100000; 838 int val = 0; 839 840 if (flags & V4L2_SEL_FLAG_GE) { 841 if (w < ask_w) 842 val -= goodness; 843 if (h < ask_h) 844 val -= goodness; 845 } 846 847 if (flags & V4L2_SEL_FLAG_LE) { 848 if (w > ask_w) 849 val -= goodness; 850 if (h > ask_h) 851 val -= goodness; 852 } 853 854 val -= abs(w - ask_w); 855 val -= abs(h - ask_h); 856 857 dev_dbg(dev, "%s: ask %dx%d, size %dx%d, goodness %d\n", 858 __func__, ask_w, ask_h, w, h, val); 859 860 return val; 861 } 862 863 /** 864 * Helper function to change binning and set both compose and format. 865 * 866 * We have two entry points to change binning: set_fmt and 867 * set_selection(COMPOSE). Both have to compute the new output size 868 * and set it in both the compose rect and the frame format size. We 869 * also need to do the same things after setting cropping to restore 870 * 1:1 binning. 871 * 872 * This function contains the common code for these three cases, it 873 * has many arguments in order to accommodate the needs of all of 874 * them. 875 * 876 * Must be called with imx274->lock locked. 877 * 878 * @imx274: The device object 879 * @cfg: The pad config we are editing for TRY requests 880 * @which: V4L2_SUBDEV_FORMAT_ACTIVE or V4L2_SUBDEV_FORMAT_TRY from the caller 881 * @width: Input-output parameter: set to the desired width before 882 * the call, contains the chosen value after returning successfully 883 * @height: Input-output parameter for height (see @width) 884 * @flags: Selection flags from struct v4l2_subdev_selection, or 0 if not 885 * available (when called from set_fmt) 886 */ 887 static int __imx274_change_compose(struct stimx274 *imx274, 888 struct v4l2_subdev_pad_config *cfg, 889 u32 which, 890 u32 *width, 891 u32 *height, 892 u32 flags) 893 { 894 struct device *dev = &imx274->client->dev; 895 const struct v4l2_rect *cur_crop; 896 struct v4l2_mbus_framefmt *tgt_fmt; 897 unsigned int i; 898 const struct imx274_mode *best_mode = &imx274_modes[0]; 899 int best_goodness = INT_MIN; 900 901 if (which == V4L2_SUBDEV_FORMAT_TRY) { 902 cur_crop = &cfg->try_crop; 903 tgt_fmt = &cfg->try_fmt; 904 } else { 905 cur_crop = &imx274->crop; 906 tgt_fmt = &imx274->format; 907 } 908 909 for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) { 910 unsigned int ratio = imx274_modes[i].bin_ratio; 911 912 int goodness = imx274_binning_goodness( 913 imx274, 914 cur_crop->width / ratio, *width, 915 cur_crop->height / ratio, *height, 916 flags); 917 918 if (goodness >= best_goodness) { 919 best_goodness = goodness; 920 best_mode = &imx274_modes[i]; 921 } 922 } 923 924 *width = cur_crop->width / best_mode->bin_ratio; 925 *height = cur_crop->height / best_mode->bin_ratio; 926 927 if (which == V4L2_SUBDEV_FORMAT_ACTIVE) 928 imx274->mode = best_mode; 929 930 dev_dbg(dev, "%s: selected %u:1 binning\n", 931 __func__, best_mode->bin_ratio); 932 933 tgt_fmt->width = *width; 934 tgt_fmt->height = *height; 935 tgt_fmt->field = V4L2_FIELD_NONE; 936 937 return 0; 938 } 939 940 /** 941 * imx274_get_fmt - Get the pad format 942 * @sd: Pointer to V4L2 Sub device structure 943 * @cfg: Pointer to sub device pad information structure 944 * @fmt: Pointer to pad level media bus format 945 * 946 * This function is used to get the pad format information. 947 * 948 * Return: 0 on success 949 */ 950 static int imx274_get_fmt(struct v4l2_subdev *sd, 951 struct v4l2_subdev_pad_config *cfg, 952 struct v4l2_subdev_format *fmt) 953 { 954 struct stimx274 *imx274 = to_imx274(sd); 955 956 mutex_lock(&imx274->lock); 957 fmt->format = imx274->format; 958 mutex_unlock(&imx274->lock); 959 return 0; 960 } 961 962 /** 963 * imx274_set_fmt - This is used to set the pad format 964 * @sd: Pointer to V4L2 Sub device structure 965 * @cfg: Pointer to sub device pad information structure 966 * @format: Pointer to pad level media bus format 967 * 968 * This function is used to set the pad format. 969 * 970 * Return: 0 on success 971 */ 972 static int imx274_set_fmt(struct v4l2_subdev *sd, 973 struct v4l2_subdev_pad_config *cfg, 974 struct v4l2_subdev_format *format) 975 { 976 struct v4l2_mbus_framefmt *fmt = &format->format; 977 struct stimx274 *imx274 = to_imx274(sd); 978 int err = 0; 979 980 mutex_lock(&imx274->lock); 981 982 err = __imx274_change_compose(imx274, cfg, format->which, 983 &fmt->width, &fmt->height, 0); 984 985 if (err) 986 goto out; 987 988 /* 989 * __imx274_change_compose already set width and height in the 990 * applicable format, but we need to keep all other format 991 * values, so do a full copy here 992 */ 993 fmt->field = V4L2_FIELD_NONE; 994 if (format->which == V4L2_SUBDEV_FORMAT_TRY) 995 cfg->try_fmt = *fmt; 996 else 997 imx274->format = *fmt; 998 999 out: 1000 mutex_unlock(&imx274->lock); 1001 1002 return err; 1003 } 1004 1005 static int imx274_get_selection(struct v4l2_subdev *sd, 1006 struct v4l2_subdev_pad_config *cfg, 1007 struct v4l2_subdev_selection *sel) 1008 { 1009 struct stimx274 *imx274 = to_imx274(sd); 1010 const struct v4l2_rect *src_crop; 1011 const struct v4l2_mbus_framefmt *src_fmt; 1012 int ret = 0; 1013 1014 if (sel->pad != 0) 1015 return -EINVAL; 1016 1017 if (sel->target == V4L2_SEL_TGT_CROP_BOUNDS) { 1018 sel->r.left = 0; 1019 sel->r.top = 0; 1020 sel->r.width = IMX274_MAX_WIDTH; 1021 sel->r.height = IMX274_MAX_HEIGHT; 1022 return 0; 1023 } 1024 1025 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) { 1026 src_crop = &cfg->try_crop; 1027 src_fmt = &cfg->try_fmt; 1028 } else { 1029 src_crop = &imx274->crop; 1030 src_fmt = &imx274->format; 1031 } 1032 1033 mutex_lock(&imx274->lock); 1034 1035 switch (sel->target) { 1036 case V4L2_SEL_TGT_CROP: 1037 sel->r = *src_crop; 1038 break; 1039 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1040 sel->r.top = 0; 1041 sel->r.left = 0; 1042 sel->r.width = src_crop->width; 1043 sel->r.height = src_crop->height; 1044 break; 1045 case V4L2_SEL_TGT_COMPOSE: 1046 sel->r.top = 0; 1047 sel->r.left = 0; 1048 sel->r.width = src_fmt->width; 1049 sel->r.height = src_fmt->height; 1050 break; 1051 default: 1052 ret = -EINVAL; 1053 } 1054 1055 mutex_unlock(&imx274->lock); 1056 1057 return ret; 1058 } 1059 1060 static int imx274_set_selection_crop(struct stimx274 *imx274, 1061 struct v4l2_subdev_pad_config *cfg, 1062 struct v4l2_subdev_selection *sel) 1063 { 1064 struct v4l2_rect *tgt_crop; 1065 struct v4l2_rect new_crop; 1066 bool size_changed; 1067 1068 /* 1069 * h_step could be 12 or 24 depending on the binning. But we 1070 * won't know the binning until we choose the mode later in 1071 * __imx274_change_compose(). Thus let's be safe and use the 1072 * most conservative value in all cases. 1073 */ 1074 const u32 h_step = 24; 1075 1076 new_crop.width = min_t(u32, 1077 IMX274_ROUND(sel->r.width, h_step, sel->flags), 1078 IMX274_MAX_WIDTH); 1079 1080 /* Constraint: HTRIMMING_END - HTRIMMING_START >= 144 */ 1081 if (new_crop.width < 144) 1082 new_crop.width = 144; 1083 1084 new_crop.left = min_t(u32, 1085 IMX274_ROUND(sel->r.left, h_step, 0), 1086 IMX274_MAX_WIDTH - new_crop.width); 1087 1088 new_crop.height = min_t(u32, 1089 IMX274_ROUND(sel->r.height, 2, sel->flags), 1090 IMX274_MAX_HEIGHT); 1091 1092 new_crop.top = min_t(u32, IMX274_ROUND(sel->r.top, 2, 0), 1093 IMX274_MAX_HEIGHT - new_crop.height); 1094 1095 sel->r = new_crop; 1096 1097 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) 1098 tgt_crop = &cfg->try_crop; 1099 else 1100 tgt_crop = &imx274->crop; 1101 1102 mutex_lock(&imx274->lock); 1103 1104 size_changed = (new_crop.width != tgt_crop->width || 1105 new_crop.height != tgt_crop->height); 1106 1107 /* __imx274_change_compose needs the new size in *tgt_crop */ 1108 *tgt_crop = new_crop; 1109 1110 /* if crop size changed then reset the output image size */ 1111 if (size_changed) 1112 __imx274_change_compose(imx274, cfg, sel->which, 1113 &new_crop.width, &new_crop.height, 1114 sel->flags); 1115 1116 mutex_unlock(&imx274->lock); 1117 1118 return 0; 1119 } 1120 1121 static int imx274_set_selection(struct v4l2_subdev *sd, 1122 struct v4l2_subdev_pad_config *cfg, 1123 struct v4l2_subdev_selection *sel) 1124 { 1125 struct stimx274 *imx274 = to_imx274(sd); 1126 1127 if (sel->pad != 0) 1128 return -EINVAL; 1129 1130 if (sel->target == V4L2_SEL_TGT_CROP) 1131 return imx274_set_selection_crop(imx274, cfg, sel); 1132 1133 if (sel->target == V4L2_SEL_TGT_COMPOSE) { 1134 int err; 1135 1136 mutex_lock(&imx274->lock); 1137 err = __imx274_change_compose(imx274, cfg, sel->which, 1138 &sel->r.width, &sel->r.height, 1139 sel->flags); 1140 mutex_unlock(&imx274->lock); 1141 1142 /* 1143 * __imx274_change_compose already set width and 1144 * height in set->r, we still need to set top-left 1145 */ 1146 if (!err) { 1147 sel->r.top = 0; 1148 sel->r.left = 0; 1149 } 1150 1151 return err; 1152 } 1153 1154 return -EINVAL; 1155 } 1156 1157 static int imx274_apply_trimming(struct stimx274 *imx274) 1158 { 1159 u32 h_start; 1160 u32 h_end; 1161 u32 hmax; 1162 u32 v_cut; 1163 s32 v_pos; 1164 u32 write_v_size; 1165 u32 y_out_size; 1166 int err; 1167 1168 h_start = imx274->crop.left + 12; 1169 h_end = h_start + imx274->crop.width; 1170 1171 /* Use the minimum allowed value of HMAX */ 1172 /* Note: except in mode 1, (width / 16 + 23) is always < hmax_min */ 1173 /* Note: 260 is the minimum HMAX in all implemented modes */ 1174 hmax = max_t(u32, 260, (imx274->crop.width) / 16 + 23); 1175 1176 /* invert v_pos if VFLIP */ 1177 v_pos = imx274->ctrls.vflip->cur.val ? 1178 (-imx274->crop.top / 2) : (imx274->crop.top / 2); 1179 v_cut = (IMX274_MAX_HEIGHT - imx274->crop.height) / 2; 1180 write_v_size = imx274->crop.height + 22; 1181 y_out_size = imx274->crop.height + 14; 1182 1183 err = imx274_write_mbreg(imx274, IMX274_HMAX_REG_LSB, hmax, 2); 1184 if (!err) 1185 err = imx274_write_mbreg(imx274, IMX274_HTRIM_EN_REG, 1, 1); 1186 if (!err) 1187 err = imx274_write_mbreg(imx274, IMX274_HTRIM_START_REG_LSB, 1188 h_start, 2); 1189 if (!err) 1190 err = imx274_write_mbreg(imx274, IMX274_HTRIM_END_REG_LSB, 1191 h_end, 2); 1192 if (!err) 1193 err = imx274_write_mbreg(imx274, IMX274_VWIDCUTEN_REG, 1, 1); 1194 if (!err) 1195 err = imx274_write_mbreg(imx274, IMX274_VWIDCUT_REG_LSB, 1196 v_cut, 2); 1197 if (!err) 1198 err = imx274_write_mbreg(imx274, IMX274_VWINPOS_REG_LSB, 1199 v_pos, 2); 1200 if (!err) 1201 err = imx274_write_mbreg(imx274, IMX274_WRITE_VSIZE_REG_LSB, 1202 write_v_size, 2); 1203 if (!err) 1204 err = imx274_write_mbreg(imx274, IMX274_Y_OUT_SIZE_REG_LSB, 1205 y_out_size, 2); 1206 1207 return err; 1208 } 1209 1210 /** 1211 * imx274_g_frame_interval - Get the frame interval 1212 * @sd: Pointer to V4L2 Sub device structure 1213 * @fi: Pointer to V4l2 Sub device frame interval structure 1214 * 1215 * This function is used to get the frame interval. 1216 * 1217 * Return: 0 on success 1218 */ 1219 static int imx274_g_frame_interval(struct v4l2_subdev *sd, 1220 struct v4l2_subdev_frame_interval *fi) 1221 { 1222 struct stimx274 *imx274 = to_imx274(sd); 1223 1224 fi->interval = imx274->frame_interval; 1225 dev_dbg(&imx274->client->dev, "%s frame rate = %d / %d\n", 1226 __func__, imx274->frame_interval.numerator, 1227 imx274->frame_interval.denominator); 1228 1229 return 0; 1230 } 1231 1232 /** 1233 * imx274_s_frame_interval - Set the frame interval 1234 * @sd: Pointer to V4L2 Sub device structure 1235 * @fi: Pointer to V4l2 Sub device frame interval structure 1236 * 1237 * This function is used to set the frame intervavl. 1238 * 1239 * Return: 0 on success 1240 */ 1241 static int imx274_s_frame_interval(struct v4l2_subdev *sd, 1242 struct v4l2_subdev_frame_interval *fi) 1243 { 1244 struct stimx274 *imx274 = to_imx274(sd); 1245 struct v4l2_ctrl *ctrl = imx274->ctrls.exposure; 1246 int min, max, def; 1247 int ret; 1248 1249 mutex_lock(&imx274->lock); 1250 ret = imx274_set_frame_interval(imx274, fi->interval); 1251 1252 if (!ret) { 1253 /* 1254 * exposure time range is decided by frame interval 1255 * need to update it after frame interval changes 1256 */ 1257 min = IMX274_MIN_EXPOSURE_TIME; 1258 max = fi->interval.numerator * 1000000 1259 / fi->interval.denominator; 1260 def = max; 1261 if (__v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) { 1262 dev_err(&imx274->client->dev, 1263 "Exposure ctrl range update failed\n"); 1264 goto unlock; 1265 } 1266 1267 /* update exposure time accordingly */ 1268 imx274_set_exposure(imx274, ctrl->val); 1269 1270 dev_dbg(&imx274->client->dev, "set frame interval to %uus\n", 1271 fi->interval.numerator * 1000000 1272 / fi->interval.denominator); 1273 } 1274 1275 unlock: 1276 mutex_unlock(&imx274->lock); 1277 1278 return ret; 1279 } 1280 1281 /** 1282 * imx274_load_default - load default control values 1283 * @priv: Pointer to device structure 1284 * 1285 * Return: 0 on success, errors otherwise 1286 */ 1287 static int imx274_load_default(struct stimx274 *priv) 1288 { 1289 int ret; 1290 1291 /* load default control values */ 1292 priv->frame_interval.numerator = 1; 1293 priv->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1294 priv->ctrls.exposure->val = 1000000 / IMX274_DEF_FRAME_RATE; 1295 priv->ctrls.gain->val = IMX274_DEF_GAIN; 1296 priv->ctrls.vflip->val = 0; 1297 priv->ctrls.test_pattern->val = TEST_PATTERN_DISABLED; 1298 1299 /* update frame rate */ 1300 ret = imx274_set_frame_interval(priv, 1301 priv->frame_interval); 1302 if (ret) 1303 return ret; 1304 1305 /* update exposure time */ 1306 ret = v4l2_ctrl_s_ctrl(priv->ctrls.exposure, priv->ctrls.exposure->val); 1307 if (ret) 1308 return ret; 1309 1310 /* update gain */ 1311 ret = v4l2_ctrl_s_ctrl(priv->ctrls.gain, priv->ctrls.gain->val); 1312 if (ret) 1313 return ret; 1314 1315 /* update vflip */ 1316 ret = v4l2_ctrl_s_ctrl(priv->ctrls.vflip, priv->ctrls.vflip->val); 1317 if (ret) 1318 return ret; 1319 1320 return 0; 1321 } 1322 1323 /** 1324 * imx274_s_stream - It is used to start/stop the streaming. 1325 * @sd: V4L2 Sub device 1326 * @on: Flag (True / False) 1327 * 1328 * This function controls the start or stop of streaming for the 1329 * imx274 sensor. 1330 * 1331 * Return: 0 on success, errors otherwise 1332 */ 1333 static int imx274_s_stream(struct v4l2_subdev *sd, int on) 1334 { 1335 struct stimx274 *imx274 = to_imx274(sd); 1336 int ret = 0; 1337 1338 dev_dbg(&imx274->client->dev, "%s : %s, mode index = %td\n", __func__, 1339 on ? "Stream Start" : "Stream Stop", 1340 imx274->mode - &imx274_modes[0]); 1341 1342 mutex_lock(&imx274->lock); 1343 1344 if (on) { 1345 /* load mode registers */ 1346 ret = imx274_mode_regs(imx274); 1347 if (ret) 1348 goto fail; 1349 1350 ret = imx274_apply_trimming(imx274); 1351 if (ret) 1352 goto fail; 1353 1354 /* 1355 * update frame rate & expsoure. if the last mode is different, 1356 * HMAX could be changed. As the result, frame rate & exposure 1357 * are changed. 1358 * gain is not affected. 1359 */ 1360 ret = imx274_set_frame_interval(imx274, 1361 imx274->frame_interval); 1362 if (ret) 1363 goto fail; 1364 1365 /* update exposure time */ 1366 ret = __v4l2_ctrl_s_ctrl(imx274->ctrls.exposure, 1367 imx274->ctrls.exposure->val); 1368 if (ret) 1369 goto fail; 1370 1371 /* start stream */ 1372 ret = imx274_start_stream(imx274); 1373 if (ret) 1374 goto fail; 1375 } else { 1376 /* stop stream */ 1377 ret = imx274_write_table(imx274, imx274_stop); 1378 if (ret) 1379 goto fail; 1380 } 1381 1382 mutex_unlock(&imx274->lock); 1383 dev_dbg(&imx274->client->dev, "%s : Done\n", __func__); 1384 return 0; 1385 1386 fail: 1387 mutex_unlock(&imx274->lock); 1388 dev_err(&imx274->client->dev, "s_stream failed\n"); 1389 return ret; 1390 } 1391 1392 /* 1393 * imx274_get_frame_length - Function for obtaining current frame length 1394 * @priv: Pointer to device structure 1395 * @val: Pointer to obainted value 1396 * 1397 * frame_length = vmax x (svr + 1), in unit of hmax. 1398 * 1399 * Return: 0 on success 1400 */ 1401 static int imx274_get_frame_length(struct stimx274 *priv, u32 *val) 1402 { 1403 int err; 1404 u32 svr; 1405 u32 vmax; 1406 1407 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1408 if (err) 1409 goto fail; 1410 1411 err = imx274_read_mbreg(priv, IMX274_VMAX_REG_3, &vmax, 3); 1412 if (err) 1413 goto fail; 1414 1415 *val = vmax * (svr + 1); 1416 1417 return 0; 1418 1419 fail: 1420 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1421 return err; 1422 } 1423 1424 static int imx274_clamp_coarse_time(struct stimx274 *priv, u32 *val, 1425 u32 *frame_length) 1426 { 1427 int err; 1428 1429 err = imx274_get_frame_length(priv, frame_length); 1430 if (err) 1431 return err; 1432 1433 if (*frame_length < priv->mode->min_frame_len) 1434 *frame_length = priv->mode->min_frame_len; 1435 1436 *val = *frame_length - *val; /* convert to raw shr */ 1437 if (*val > *frame_length - IMX274_SHR_LIMIT_CONST) 1438 *val = *frame_length - IMX274_SHR_LIMIT_CONST; 1439 else if (*val < priv->mode->min_SHR) 1440 *val = priv->mode->min_SHR; 1441 1442 return 0; 1443 } 1444 1445 /* 1446 * imx274_set_digital gain - Function called when setting digital gain 1447 * @priv: Pointer to device structure 1448 * @dgain: Value of digital gain. 1449 * 1450 * Digital gain has only 4 steps: 1x, 2x, 4x, and 8x 1451 * 1452 * Return: 0 on success 1453 */ 1454 static int imx274_set_digital_gain(struct stimx274 *priv, u32 dgain) 1455 { 1456 u8 reg_val; 1457 1458 reg_val = ffs(dgain); 1459 1460 if (reg_val) 1461 reg_val--; 1462 1463 reg_val = clamp(reg_val, (u8)0, (u8)3); 1464 1465 return imx274_write_reg(priv, IMX274_DIGITAL_GAIN_REG, 1466 reg_val & IMX274_MASK_LSB_4_BITS); 1467 } 1468 1469 /* 1470 * imx274_set_gain - Function called when setting gain 1471 * @priv: Pointer to device structure 1472 * @val: Value of gain. the real value = val << IMX274_GAIN_SHIFT; 1473 * @ctrl: v4l2 control pointer 1474 * 1475 * Set the gain based on input value. 1476 * The caller should hold the mutex lock imx274->lock if necessary 1477 * 1478 * Return: 0 on success 1479 */ 1480 static int imx274_set_gain(struct stimx274 *priv, struct v4l2_ctrl *ctrl) 1481 { 1482 int err; 1483 u32 gain, analog_gain, digital_gain, gain_reg; 1484 1485 gain = (u32)(ctrl->val); 1486 1487 dev_dbg(&priv->client->dev, 1488 "%s : input gain = %d.%d\n", __func__, 1489 gain >> IMX274_GAIN_SHIFT, 1490 ((gain & IMX274_GAIN_SHIFT_MASK) * 100) >> IMX274_GAIN_SHIFT); 1491 1492 if (gain > IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN) 1493 gain = IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN; 1494 else if (gain < IMX274_MIN_GAIN) 1495 gain = IMX274_MIN_GAIN; 1496 1497 if (gain <= IMX274_MAX_ANALOG_GAIN) 1498 digital_gain = 1; 1499 else if (gain <= IMX274_MAX_ANALOG_GAIN * 2) 1500 digital_gain = 2; 1501 else if (gain <= IMX274_MAX_ANALOG_GAIN * 4) 1502 digital_gain = 4; 1503 else 1504 digital_gain = IMX274_MAX_DIGITAL_GAIN; 1505 1506 analog_gain = gain / digital_gain; 1507 1508 dev_dbg(&priv->client->dev, 1509 "%s : digital gain = %d, analog gain = %d.%d\n", 1510 __func__, digital_gain, analog_gain >> IMX274_GAIN_SHIFT, 1511 ((analog_gain & IMX274_GAIN_SHIFT_MASK) * 100) 1512 >> IMX274_GAIN_SHIFT); 1513 1514 err = imx274_set_digital_gain(priv, digital_gain); 1515 if (err) 1516 goto fail; 1517 1518 /* convert to register value, refer to imx274 datasheet */ 1519 gain_reg = (u32)IMX274_GAIN_CONST - 1520 (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) / analog_gain; 1521 if (gain_reg > IMX274_GAIN_REG_MAX) 1522 gain_reg = IMX274_GAIN_REG_MAX; 1523 1524 err = imx274_write_mbreg(priv, IMX274_ANALOG_GAIN_ADDR_LSB, gain_reg, 1525 2); 1526 if (err) 1527 goto fail; 1528 1529 if (IMX274_GAIN_CONST - gain_reg == 0) { 1530 err = -EINVAL; 1531 goto fail; 1532 } 1533 1534 /* convert register value back to gain value */ 1535 ctrl->val = (IMX274_GAIN_CONST << IMX274_GAIN_SHIFT) 1536 / (IMX274_GAIN_CONST - gain_reg) * digital_gain; 1537 1538 dev_dbg(&priv->client->dev, 1539 "%s : GAIN control success, gain_reg = %d, new gain = %d\n", 1540 __func__, gain_reg, ctrl->val); 1541 1542 return 0; 1543 1544 fail: 1545 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1546 return err; 1547 } 1548 1549 /* 1550 * imx274_set_coarse_time - Function called when setting SHR value 1551 * @priv: Pointer to device structure 1552 * @val: Value for exposure time in number of line_length, or [HMAX] 1553 * 1554 * Set SHR value based on input value. 1555 * 1556 * Return: 0 on success 1557 */ 1558 static int imx274_set_coarse_time(struct stimx274 *priv, u32 *val) 1559 { 1560 int err; 1561 u32 coarse_time, frame_length; 1562 1563 coarse_time = *val; 1564 1565 /* convert exposure_time to appropriate SHR value */ 1566 err = imx274_clamp_coarse_time(priv, &coarse_time, &frame_length); 1567 if (err) 1568 goto fail; 1569 1570 err = imx274_write_mbreg(priv, IMX274_SHR_REG_LSB, coarse_time, 2); 1571 if (err) 1572 goto fail; 1573 1574 *val = frame_length - coarse_time; 1575 return 0; 1576 1577 fail: 1578 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1579 return err; 1580 } 1581 1582 /* 1583 * imx274_set_exposure - Function called when setting exposure time 1584 * @priv: Pointer to device structure 1585 * @val: Variable for exposure time, in the unit of micro-second 1586 * 1587 * Set exposure time based on input value. 1588 * The caller should hold the mutex lock imx274->lock if necessary 1589 * 1590 * Return: 0 on success 1591 */ 1592 static int imx274_set_exposure(struct stimx274 *priv, int val) 1593 { 1594 int err; 1595 u32 hmax; 1596 u32 coarse_time; /* exposure time in unit of line (HMAX)*/ 1597 1598 dev_dbg(&priv->client->dev, 1599 "%s : EXPOSURE control input = %d\n", __func__, val); 1600 1601 /* step 1: convert input exposure_time (val) into number of 1[HMAX] */ 1602 1603 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1604 if (err) 1605 goto fail; 1606 1607 if (hmax == 0) { 1608 err = -EINVAL; 1609 goto fail; 1610 } 1611 1612 coarse_time = (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2 * val 1613 - priv->mode->nocpiop) / hmax; 1614 1615 /* step 2: convert exposure_time into SHR value */ 1616 1617 /* set SHR */ 1618 err = imx274_set_coarse_time(priv, &coarse_time); 1619 if (err) 1620 goto fail; 1621 1622 priv->ctrls.exposure->val = 1623 (coarse_time * hmax + priv->mode->nocpiop) 1624 / (IMX274_PIXCLK_CONST1 / IMX274_PIXCLK_CONST2); 1625 1626 dev_dbg(&priv->client->dev, 1627 "%s : EXPOSURE control success\n", __func__); 1628 return 0; 1629 1630 fail: 1631 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1632 1633 return err; 1634 } 1635 1636 /* 1637 * imx274_set_vflip - Function called when setting vertical flip 1638 * @priv: Pointer to device structure 1639 * @val: Value for vflip setting 1640 * 1641 * Set vertical flip based on input value. 1642 * val = 0: normal, no vertical flip 1643 * val = 1: vertical flip enabled 1644 * The caller should hold the mutex lock imx274->lock if necessary 1645 * 1646 * Return: 0 on success 1647 */ 1648 static int imx274_set_vflip(struct stimx274 *priv, int val) 1649 { 1650 int err; 1651 1652 err = imx274_write_reg(priv, IMX274_VFLIP_REG, val); 1653 if (err) { 1654 dev_err(&priv->client->dev, "VFLIP control error\n"); 1655 return err; 1656 } 1657 1658 dev_dbg(&priv->client->dev, 1659 "%s : VFLIP control success\n", __func__); 1660 1661 return 0; 1662 } 1663 1664 /* 1665 * imx274_set_test_pattern - Function called when setting test pattern 1666 * @priv: Pointer to device structure 1667 * @val: Variable for test pattern 1668 * 1669 * Set to different test patterns based on input value. 1670 * 1671 * Return: 0 on success 1672 */ 1673 static int imx274_set_test_pattern(struct stimx274 *priv, int val) 1674 { 1675 int err = 0; 1676 1677 if (val == TEST_PATTERN_DISABLED) { 1678 err = imx274_write_table(priv, imx274_tp_disabled); 1679 } else if (val <= TEST_PATTERN_V_COLOR_BARS) { 1680 err = imx274_write_reg(priv, IMX274_TEST_PATTERN_REG, val - 1); 1681 if (!err) 1682 err = imx274_write_table(priv, imx274_tp_regs); 1683 } else { 1684 err = -EINVAL; 1685 } 1686 1687 if (!err) 1688 dev_dbg(&priv->client->dev, 1689 "%s : TEST PATTERN control success\n", __func__); 1690 else 1691 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1692 1693 return err; 1694 } 1695 1696 /* 1697 * imx274_set_frame_length - Function called when setting frame length 1698 * @priv: Pointer to device structure 1699 * @val: Variable for frame length (= VMAX, i.e. vertical drive period length) 1700 * 1701 * Set frame length based on input value. 1702 * 1703 * Return: 0 on success 1704 */ 1705 static int imx274_set_frame_length(struct stimx274 *priv, u32 val) 1706 { 1707 int err; 1708 u32 frame_length; 1709 1710 dev_dbg(&priv->client->dev, "%s : input length = %d\n", 1711 __func__, val); 1712 1713 frame_length = (u32)val; 1714 1715 err = imx274_write_mbreg(priv, IMX274_VMAX_REG_3, frame_length, 3); 1716 if (err) 1717 goto fail; 1718 1719 return 0; 1720 1721 fail: 1722 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1723 return err; 1724 } 1725 1726 /* 1727 * imx274_set_frame_interval - Function called when setting frame interval 1728 * @priv: Pointer to device structure 1729 * @frame_interval: Variable for frame interval 1730 * 1731 * Change frame interval by updating VMAX value 1732 * The caller should hold the mutex lock imx274->lock if necessary 1733 * 1734 * Return: 0 on success 1735 */ 1736 static int imx274_set_frame_interval(struct stimx274 *priv, 1737 struct v4l2_fract frame_interval) 1738 { 1739 int err; 1740 u32 frame_length, req_frame_rate; 1741 u32 svr; 1742 u32 hmax; 1743 1744 dev_dbg(&priv->client->dev, "%s: input frame interval = %d / %d", 1745 __func__, frame_interval.numerator, 1746 frame_interval.denominator); 1747 1748 if (frame_interval.numerator == 0) { 1749 err = -EINVAL; 1750 goto fail; 1751 } 1752 1753 req_frame_rate = (u32)(frame_interval.denominator 1754 / frame_interval.numerator); 1755 1756 /* boundary check */ 1757 if (req_frame_rate > priv->mode->max_fps) { 1758 frame_interval.numerator = 1; 1759 frame_interval.denominator = priv->mode->max_fps; 1760 } else if (req_frame_rate < IMX274_MIN_FRAME_RATE) { 1761 frame_interval.numerator = 1; 1762 frame_interval.denominator = IMX274_MIN_FRAME_RATE; 1763 } 1764 1765 /* 1766 * VMAX = 1/frame_rate x 72M / (SVR+1) / HMAX 1767 * frame_length (i.e. VMAX) = (frame_interval) x 72M /(SVR+1) / HMAX 1768 */ 1769 1770 err = imx274_read_mbreg(priv, IMX274_SVR_REG_LSB, &svr, 2); 1771 if (err) 1772 goto fail; 1773 1774 dev_dbg(&priv->client->dev, 1775 "%s : register SVR = %d\n", __func__, svr); 1776 1777 err = imx274_read_mbreg(priv, IMX274_HMAX_REG_LSB, &hmax, 2); 1778 if (err) 1779 goto fail; 1780 1781 dev_dbg(&priv->client->dev, 1782 "%s : register HMAX = %d\n", __func__, hmax); 1783 1784 if (hmax == 0 || frame_interval.denominator == 0) { 1785 err = -EINVAL; 1786 goto fail; 1787 } 1788 1789 frame_length = IMX274_PIXCLK_CONST1 / (svr + 1) / hmax 1790 * frame_interval.numerator 1791 / frame_interval.denominator; 1792 1793 err = imx274_set_frame_length(priv, frame_length); 1794 if (err) 1795 goto fail; 1796 1797 priv->frame_interval = frame_interval; 1798 return 0; 1799 1800 fail: 1801 dev_err(&priv->client->dev, "%s error = %d\n", __func__, err); 1802 return err; 1803 } 1804 1805 static const struct v4l2_subdev_pad_ops imx274_pad_ops = { 1806 .get_fmt = imx274_get_fmt, 1807 .set_fmt = imx274_set_fmt, 1808 .get_selection = imx274_get_selection, 1809 .set_selection = imx274_set_selection, 1810 }; 1811 1812 static const struct v4l2_subdev_video_ops imx274_video_ops = { 1813 .g_frame_interval = imx274_g_frame_interval, 1814 .s_frame_interval = imx274_s_frame_interval, 1815 .s_stream = imx274_s_stream, 1816 }; 1817 1818 static const struct v4l2_subdev_ops imx274_subdev_ops = { 1819 .pad = &imx274_pad_ops, 1820 .video = &imx274_video_ops, 1821 }; 1822 1823 static const struct v4l2_ctrl_ops imx274_ctrl_ops = { 1824 .s_ctrl = imx274_s_ctrl, 1825 }; 1826 1827 static const struct of_device_id imx274_of_id_table[] = { 1828 { .compatible = "sony,imx274" }, 1829 { } 1830 }; 1831 MODULE_DEVICE_TABLE(of, imx274_of_id_table); 1832 1833 static const struct i2c_device_id imx274_id[] = { 1834 { "IMX274", 0 }, 1835 { } 1836 }; 1837 MODULE_DEVICE_TABLE(i2c, imx274_id); 1838 1839 static int imx274_probe(struct i2c_client *client, 1840 const struct i2c_device_id *id) 1841 { 1842 struct v4l2_subdev *sd; 1843 struct stimx274 *imx274; 1844 int ret; 1845 1846 /* initialize imx274 */ 1847 imx274 = devm_kzalloc(&client->dev, sizeof(*imx274), GFP_KERNEL); 1848 if (!imx274) 1849 return -ENOMEM; 1850 1851 mutex_init(&imx274->lock); 1852 1853 /* initialize format */ 1854 imx274->mode = &imx274_modes[IMX274_DEFAULT_BINNING]; 1855 imx274->crop.width = IMX274_MAX_WIDTH; 1856 imx274->crop.height = IMX274_MAX_HEIGHT; 1857 imx274->format.width = imx274->crop.width / imx274->mode->bin_ratio; 1858 imx274->format.height = imx274->crop.height / imx274->mode->bin_ratio; 1859 imx274->format.field = V4L2_FIELD_NONE; 1860 imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10; 1861 imx274->format.colorspace = V4L2_COLORSPACE_SRGB; 1862 imx274->frame_interval.numerator = 1; 1863 imx274->frame_interval.denominator = IMX274_DEF_FRAME_RATE; 1864 1865 /* initialize regmap */ 1866 imx274->regmap = devm_regmap_init_i2c(client, &imx274_regmap_config); 1867 if (IS_ERR(imx274->regmap)) { 1868 dev_err(&client->dev, 1869 "regmap init failed: %ld\n", PTR_ERR(imx274->regmap)); 1870 ret = -ENODEV; 1871 goto err_regmap; 1872 } 1873 1874 /* initialize subdevice */ 1875 imx274->client = client; 1876 sd = &imx274->sd; 1877 v4l2_i2c_subdev_init(sd, client, &imx274_subdev_ops); 1878 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; 1879 1880 /* initialize subdev media pad */ 1881 imx274->pad.flags = MEDIA_PAD_FL_SOURCE; 1882 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1883 ret = media_entity_pads_init(&sd->entity, 1, &imx274->pad); 1884 if (ret < 0) { 1885 dev_err(&client->dev, 1886 "%s : media entity init Failed %d\n", __func__, ret); 1887 goto err_regmap; 1888 } 1889 1890 /* initialize sensor reset gpio */ 1891 imx274->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 1892 GPIOD_OUT_HIGH); 1893 if (IS_ERR(imx274->reset_gpio)) { 1894 if (PTR_ERR(imx274->reset_gpio) != -EPROBE_DEFER) 1895 dev_err(&client->dev, "Reset GPIO not setup in DT"); 1896 ret = PTR_ERR(imx274->reset_gpio); 1897 goto err_me; 1898 } 1899 1900 /* pull sensor out of reset */ 1901 imx274_reset(imx274, 1); 1902 1903 /* initialize controls */ 1904 ret = v4l2_ctrl_handler_init(&imx274->ctrls.handler, 2); 1905 if (ret < 0) { 1906 dev_err(&client->dev, 1907 "%s : ctrl handler init Failed\n", __func__); 1908 goto err_me; 1909 } 1910 1911 imx274->ctrls.handler.lock = &imx274->lock; 1912 1913 /* add new controls */ 1914 imx274->ctrls.test_pattern = v4l2_ctrl_new_std_menu_items( 1915 &imx274->ctrls.handler, &imx274_ctrl_ops, 1916 V4L2_CID_TEST_PATTERN, 1917 ARRAY_SIZE(tp_qmenu) - 1, 0, 0, tp_qmenu); 1918 1919 imx274->ctrls.gain = v4l2_ctrl_new_std( 1920 &imx274->ctrls.handler, 1921 &imx274_ctrl_ops, 1922 V4L2_CID_GAIN, IMX274_MIN_GAIN, 1923 IMX274_MAX_DIGITAL_GAIN * IMX274_MAX_ANALOG_GAIN, 1, 1924 IMX274_DEF_GAIN); 1925 1926 imx274->ctrls.exposure = v4l2_ctrl_new_std( 1927 &imx274->ctrls.handler, 1928 &imx274_ctrl_ops, 1929 V4L2_CID_EXPOSURE, IMX274_MIN_EXPOSURE_TIME, 1930 1000000 / IMX274_DEF_FRAME_RATE, 1, 1931 IMX274_MIN_EXPOSURE_TIME); 1932 1933 imx274->ctrls.vflip = v4l2_ctrl_new_std( 1934 &imx274->ctrls.handler, 1935 &imx274_ctrl_ops, 1936 V4L2_CID_VFLIP, 0, 1, 1, 0); 1937 1938 imx274->sd.ctrl_handler = &imx274->ctrls.handler; 1939 if (imx274->ctrls.handler.error) { 1940 ret = imx274->ctrls.handler.error; 1941 goto err_ctrls; 1942 } 1943 1944 /* setup default controls */ 1945 ret = v4l2_ctrl_handler_setup(&imx274->ctrls.handler); 1946 if (ret) { 1947 dev_err(&client->dev, 1948 "Error %d setup default controls\n", ret); 1949 goto err_ctrls; 1950 } 1951 1952 /* load default control values */ 1953 ret = imx274_load_default(imx274); 1954 if (ret) { 1955 dev_err(&client->dev, 1956 "%s : imx274_load_default failed %d\n", 1957 __func__, ret); 1958 goto err_ctrls; 1959 } 1960 1961 /* register subdevice */ 1962 ret = v4l2_async_register_subdev(sd); 1963 if (ret < 0) { 1964 dev_err(&client->dev, 1965 "%s : v4l2_async_register_subdev failed %d\n", 1966 __func__, ret); 1967 goto err_ctrls; 1968 } 1969 1970 dev_info(&client->dev, "imx274 : imx274 probe success !\n"); 1971 return 0; 1972 1973 err_ctrls: 1974 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 1975 err_me: 1976 media_entity_cleanup(&sd->entity); 1977 err_regmap: 1978 mutex_destroy(&imx274->lock); 1979 return ret; 1980 } 1981 1982 static int imx274_remove(struct i2c_client *client) 1983 { 1984 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1985 struct stimx274 *imx274 = to_imx274(sd); 1986 1987 /* stop stream */ 1988 imx274_write_table(imx274, imx274_stop); 1989 1990 v4l2_async_unregister_subdev(sd); 1991 v4l2_ctrl_handler_free(&imx274->ctrls.handler); 1992 media_entity_cleanup(&sd->entity); 1993 mutex_destroy(&imx274->lock); 1994 return 0; 1995 } 1996 1997 static struct i2c_driver imx274_i2c_driver = { 1998 .driver = { 1999 .name = DRIVER_NAME, 2000 .of_match_table = imx274_of_id_table, 2001 }, 2002 .probe = imx274_probe, 2003 .remove = imx274_remove, 2004 .id_table = imx274_id, 2005 }; 2006 2007 module_i2c_driver(imx274_i2c_driver); 2008 2009 MODULE_AUTHOR("Leon Luo <leonl@leopardimaging.com>"); 2010 MODULE_DESCRIPTION("IMX274 CMOS Image Sensor driver"); 2011 MODULE_LICENSE("GPL v2"); 2012