1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019 Intel Corporation. 3 4 #include <linux/unaligned.h> 5 #include <linux/acpi.h> 6 #include <linux/clk.h> 7 #include <linux/delay.h> 8 #include <linux/gpio/consumer.h> 9 #include <linux/i2c.h> 10 #include <linux/module.h> 11 #include <linux/pm_runtime.h> 12 #include <linux/regulator/consumer.h> 13 #include <media/v4l2-ctrls.h> 14 #include <media/v4l2-device.h> 15 #include <media/v4l2-fwnode.h> 16 17 #define HI556_REG_VALUE_08BIT 1 18 #define HI556_REG_VALUE_16BIT 2 19 #define HI556_REG_VALUE_24BIT 3 20 21 #define HI556_LINK_FREQ_437MHZ 437000000ULL 22 #define HI556_MCLK 19200000 23 #define HI556_DATA_LANES 2 24 #define HI556_RGB_DEPTH 10 25 26 #define HI556_REG_CHIP_ID 0x0f16 27 #define HI556_CHIP_ID 0x0556 28 29 #define HI556_REG_MODE_SELECT 0x0a00 30 #define HI556_MODE_STANDBY 0x0000 31 #define HI556_MODE_STREAMING 0x0100 32 33 /* vertical-timings from sensor */ 34 #define HI556_REG_FLL 0x0006 35 #define HI556_FLL_30FPS 0x0814 36 #define HI556_FLL_30FPS_MIN 0x0814 37 #define HI556_FLL_MAX 0x7fff 38 39 /* horizontal-timings from sensor */ 40 #define HI556_REG_LLP 0x0008 41 42 /* Exposure controls from sensor */ 43 #define HI556_REG_EXPOSURE 0x0074 44 #define HI556_EXPOSURE_MIN 6 45 #define HI556_EXPOSURE_MAX_MARGIN 2 46 #define HI556_EXPOSURE_STEP 1 47 48 /* Analog gain controls from sensor */ 49 #define HI556_REG_ANALOG_GAIN 0x0077 50 #define HI556_ANAL_GAIN_MIN 0 51 #define HI556_ANAL_GAIN_MAX 240 52 #define HI556_ANAL_GAIN_STEP 1 53 54 /* Digital gain controls from sensor */ 55 #define HI556_REG_MWB_GR_GAIN 0x0078 56 #define HI556_REG_MWB_GB_GAIN 0x007a 57 #define HI556_REG_MWB_R_GAIN 0x007c 58 #define HI556_REG_MWB_B_GAIN 0x007e 59 #define HI556_DGTL_GAIN_MIN 0 60 #define HI556_DGTL_GAIN_MAX 2048 61 #define HI556_DGTL_GAIN_STEP 1 62 #define HI556_DGTL_GAIN_DEFAULT 256 63 64 /* Test Pattern Control */ 65 #define HI556_REG_ISP 0X0a05 66 #define HI556_REG_ISP_TPG_EN 0x01 67 #define HI556_REG_TEST_PATTERN 0x0201 68 69 /* HI556 native and active pixel array size. */ 70 #define HI556_NATIVE_WIDTH 2592U 71 #define HI556_NATIVE_HEIGHT 1944U 72 #define HI556_PIXEL_ARRAY_LEFT 0U 73 #define HI556_PIXEL_ARRAY_TOP 0U 74 #define HI556_PIXEL_ARRAY_WIDTH 2592U 75 #define HI556_PIXEL_ARRAY_HEIGHT 1944U 76 77 enum { 78 HI556_LINK_FREQ_437MHZ_INDEX, 79 }; 80 81 struct hi556_reg { 82 u16 address; 83 u16 val; 84 }; 85 86 struct hi556_reg_list { 87 u32 num_of_regs; 88 const struct hi556_reg *regs; 89 }; 90 91 struct hi556_link_freq_config { 92 const struct hi556_reg_list reg_list; 93 }; 94 95 struct hi556_mode { 96 /* Frame width in pixels */ 97 u32 width; 98 99 /* Frame height in pixels */ 100 u32 height; 101 102 /* Analog crop rectangle. */ 103 struct v4l2_rect crop; 104 105 /* Horizontal timining size */ 106 u32 llp; 107 108 /* Default vertical timining size */ 109 u32 fll_def; 110 111 /* Min vertical timining size */ 112 u32 fll_min; 113 114 /* Link frequency needed for this resolution */ 115 u32 link_freq_index; 116 117 /* Sensor register settings for this resolution */ 118 const struct hi556_reg_list reg_list; 119 }; 120 121 #define to_hi556(_sd) container_of(_sd, struct hi556, sd) 122 123 //SENSOR_INITIALIZATION 124 static const struct hi556_reg mipi_data_rate_874mbps[] = { 125 {0x0e00, 0x0102}, 126 {0x0e02, 0x0102}, 127 {0x0e0c, 0x0100}, 128 {0x2000, 0x7400}, 129 {0x2002, 0x001c}, 130 {0x2004, 0x0242}, 131 {0x2006, 0x0942}, 132 {0x2008, 0x7007}, 133 {0x200a, 0x0fd9}, 134 {0x200c, 0x0259}, 135 {0x200e, 0x7008}, 136 {0x2010, 0x160e}, 137 {0x2012, 0x0047}, 138 {0x2014, 0x2118}, 139 {0x2016, 0x0041}, 140 {0x2018, 0x00d8}, 141 {0x201a, 0x0145}, 142 {0x201c, 0x0006}, 143 {0x201e, 0x0181}, 144 {0x2020, 0x13cc}, 145 {0x2022, 0x2057}, 146 {0x2024, 0x7001}, 147 {0x2026, 0x0fca}, 148 {0x2028, 0x00cb}, 149 {0x202a, 0x009f}, 150 {0x202c, 0x7002}, 151 {0x202e, 0x13cc}, 152 {0x2030, 0x019b}, 153 {0x2032, 0x014d}, 154 {0x2034, 0x2987}, 155 {0x2036, 0x2766}, 156 {0x2038, 0x0020}, 157 {0x203a, 0x2060}, 158 {0x203c, 0x0e5d}, 159 {0x203e, 0x181d}, 160 {0x2040, 0x2066}, 161 {0x2042, 0x20c4}, 162 {0x2044, 0x5000}, 163 {0x2046, 0x0005}, 164 {0x2048, 0x0000}, 165 {0x204a, 0x01db}, 166 {0x204c, 0x025a}, 167 {0x204e, 0x00c0}, 168 {0x2050, 0x0005}, 169 {0x2052, 0x0006}, 170 {0x2054, 0x0ad9}, 171 {0x2056, 0x0259}, 172 {0x2058, 0x0618}, 173 {0x205a, 0x0258}, 174 {0x205c, 0x2266}, 175 {0x205e, 0x20c8}, 176 {0x2060, 0x2060}, 177 {0x2062, 0x707b}, 178 {0x2064, 0x0fdd}, 179 {0x2066, 0x81b8}, 180 {0x2068, 0x5040}, 181 {0x206a, 0x0020}, 182 {0x206c, 0x5060}, 183 {0x206e, 0x3143}, 184 {0x2070, 0x5081}, 185 {0x2072, 0x025c}, 186 {0x2074, 0x7800}, 187 {0x2076, 0x7400}, 188 {0x2078, 0x001c}, 189 {0x207a, 0x0242}, 190 {0x207c, 0x0942}, 191 {0x207e, 0x0bd9}, 192 {0x2080, 0x0259}, 193 {0x2082, 0x7008}, 194 {0x2084, 0x160e}, 195 {0x2086, 0x0047}, 196 {0x2088, 0x2118}, 197 {0x208a, 0x0041}, 198 {0x208c, 0x00d8}, 199 {0x208e, 0x0145}, 200 {0x2090, 0x0006}, 201 {0x2092, 0x0181}, 202 {0x2094, 0x13cc}, 203 {0x2096, 0x2057}, 204 {0x2098, 0x7001}, 205 {0x209a, 0x0fca}, 206 {0x209c, 0x00cb}, 207 {0x209e, 0x009f}, 208 {0x20a0, 0x7002}, 209 {0x20a2, 0x13cc}, 210 {0x20a4, 0x019b}, 211 {0x20a6, 0x014d}, 212 {0x20a8, 0x2987}, 213 {0x20aa, 0x2766}, 214 {0x20ac, 0x0020}, 215 {0x20ae, 0x2060}, 216 {0x20b0, 0x0e5d}, 217 {0x20b2, 0x181d}, 218 {0x20b4, 0x2066}, 219 {0x20b6, 0x20c4}, 220 {0x20b8, 0x50a0}, 221 {0x20ba, 0x0005}, 222 {0x20bc, 0x0000}, 223 {0x20be, 0x01db}, 224 {0x20c0, 0x025a}, 225 {0x20c2, 0x00c0}, 226 {0x20c4, 0x0005}, 227 {0x20c6, 0x0006}, 228 {0x20c8, 0x0ad9}, 229 {0x20ca, 0x0259}, 230 {0x20cc, 0x0618}, 231 {0x20ce, 0x0258}, 232 {0x20d0, 0x2266}, 233 {0x20d2, 0x20c8}, 234 {0x20d4, 0x2060}, 235 {0x20d6, 0x707b}, 236 {0x20d8, 0x0fdd}, 237 {0x20da, 0x86b8}, 238 {0x20dc, 0x50e0}, 239 {0x20de, 0x0020}, 240 {0x20e0, 0x5100}, 241 {0x20e2, 0x3143}, 242 {0x20e4, 0x5121}, 243 {0x20e6, 0x7800}, 244 {0x20e8, 0x3140}, 245 {0x20ea, 0x01c4}, 246 {0x20ec, 0x01c1}, 247 {0x20ee, 0x01c0}, 248 {0x20f0, 0x01c4}, 249 {0x20f2, 0x2700}, 250 {0x20f4, 0x3d40}, 251 {0x20f6, 0x7800}, 252 {0x20f8, 0xffff}, 253 {0x27fe, 0xe000}, 254 {0x3000, 0x60f8}, 255 {0x3002, 0x187f}, 256 {0x3004, 0x7060}, 257 {0x3006, 0x0114}, 258 {0x3008, 0x60b0}, 259 {0x300a, 0x1473}, 260 {0x300c, 0x0013}, 261 {0x300e, 0x140f}, 262 {0x3010, 0x0040}, 263 {0x3012, 0x100f}, 264 {0x3014, 0x60f8}, 265 {0x3016, 0x187f}, 266 {0x3018, 0x7060}, 267 {0x301a, 0x0114}, 268 {0x301c, 0x60b0}, 269 {0x301e, 0x1473}, 270 {0x3020, 0x0013}, 271 {0x3022, 0x140f}, 272 {0x3024, 0x0040}, 273 {0x3026, 0x000f}, 274 275 {0x0b00, 0x0000}, 276 {0x0b02, 0x0045}, 277 {0x0b04, 0xb405}, 278 {0x0b06, 0xc403}, 279 {0x0b08, 0x0081}, 280 {0x0b0a, 0x8252}, 281 {0x0b0c, 0xf814}, 282 {0x0b0e, 0xc618}, 283 {0x0b10, 0xa828}, 284 {0x0b12, 0x004c}, 285 {0x0b14, 0x4068}, 286 {0x0b16, 0x0000}, 287 {0x0f30, 0x5b15}, 288 {0x0f32, 0x7067}, 289 {0x0954, 0x0009}, 290 {0x0956, 0x0000}, 291 {0x0958, 0xbb80}, 292 {0x095a, 0x5140}, 293 {0x0c00, 0x1110}, 294 {0x0c02, 0x0011}, 295 {0x0c04, 0x0000}, 296 {0x0c06, 0x0200}, 297 {0x0c10, 0x0040}, 298 {0x0c12, 0x0040}, 299 {0x0c14, 0x0040}, 300 {0x0c16, 0x0040}, 301 {0x0a10, 0x4000}, 302 {0x3068, 0xf800}, 303 {0x306a, 0xf876}, 304 {0x006c, 0x0000}, 305 {0x005e, 0x0200}, 306 {0x000e, 0x0100}, 307 {0x0e0a, 0x0001}, 308 {0x004a, 0x0100}, 309 {0x004c, 0x0000}, 310 {0x004e, 0x0100}, 311 {0x000c, 0x0022}, 312 {0x0008, 0x0b00}, 313 {0x005a, 0x0202}, 314 {0x0012, 0x000e}, 315 {0x0018, 0x0a33}, 316 {0x0022, 0x0008}, 317 {0x0028, 0x0017}, 318 {0x0024, 0x0028}, 319 {0x002a, 0x002d}, 320 {0x0026, 0x0030}, 321 {0x002c, 0x07c9}, 322 {0x002e, 0x1111}, 323 {0x0030, 0x1111}, 324 {0x0032, 0x1111}, 325 {0x0006, 0x07bc}, 326 {0x0a22, 0x0000}, 327 {0x0a12, 0x0a20}, 328 {0x0a14, 0x0798}, 329 {0x003e, 0x0000}, 330 {0x0074, 0x080e}, 331 {0x0070, 0x0407}, 332 {0x0002, 0x0000}, 333 {0x0a02, 0x0100}, 334 {0x0a24, 0x0100}, 335 {0x0046, 0x0000}, 336 {0x0076, 0x0000}, 337 {0x0060, 0x0000}, 338 {0x0062, 0x0530}, 339 {0x0064, 0x0500}, 340 {0x0066, 0x0530}, 341 {0x0068, 0x0500}, 342 {0x0122, 0x0300}, 343 {0x015a, 0xff08}, 344 {0x0804, 0x0300}, 345 {0x0806, 0x0100}, 346 {0x005c, 0x0102}, 347 {0x0a1a, 0x0800}, 348 }; 349 350 static const struct hi556_reg mode_2592x1944_regs[] = { 351 {0x0a00, 0x0000}, 352 {0x0b0a, 0x8252}, 353 {0x0f30, 0x5b15}, 354 {0x0f32, 0x7067}, 355 {0x004a, 0x0100}, 356 {0x004c, 0x0000}, 357 {0x004e, 0x0100}, 358 {0x000c, 0x0022}, 359 {0x0008, 0x0b00}, 360 {0x005a, 0x0202}, 361 {0x0012, 0x000e}, 362 {0x0018, 0x0a33}, 363 {0x0022, 0x0008}, 364 {0x0028, 0x0017}, 365 {0x0024, 0x0028}, 366 {0x002a, 0x002d}, 367 {0x0026, 0x0030}, 368 {0x002c, 0x07c9}, 369 {0x002e, 0x1111}, 370 {0x0030, 0x1111}, 371 {0x0032, 0x1111}, 372 {0x0006, 0x0814}, 373 {0x0a22, 0x0000}, 374 {0x0a12, 0x0a20}, 375 {0x0a14, 0x0798}, 376 {0x003e, 0x0000}, 377 {0x0074, 0x0812}, 378 {0x0070, 0x0409}, 379 {0x0804, 0x0300}, 380 {0x0806, 0x0100}, 381 {0x0a04, 0x014a}, 382 {0x090c, 0x0fdc}, 383 {0x090e, 0x002d}, 384 385 {0x0902, 0x4319}, 386 {0x0914, 0xc10a}, 387 {0x0916, 0x071f}, 388 {0x0918, 0x0408}, 389 {0x091a, 0x0c0d}, 390 {0x091c, 0x0f09}, 391 {0x091e, 0x0a00}, 392 {0x0958, 0xbb80}, 393 }; 394 395 static const struct hi556_reg mode_2592x1444_regs[] = { 396 {0x0a00, 0x0000}, 397 {0x0b0a, 0x8252}, 398 {0x0f30, 0xe545}, 399 {0x0f32, 0x7067}, 400 {0x004a, 0x0100}, 401 {0x004c, 0x0000}, 402 {0x000c, 0x0022}, 403 {0x0008, 0x0b00}, 404 {0x005a, 0x0202}, 405 {0x0012, 0x000e}, 406 {0x0018, 0x0a33}, 407 {0x0022, 0x0008}, 408 {0x0028, 0x0017}, 409 {0x0024, 0x0122}, 410 {0x002a, 0x0127}, 411 {0x0026, 0x012a}, 412 {0x002c, 0x06cf}, 413 {0x002e, 0x1111}, 414 {0x0030, 0x1111}, 415 {0x0032, 0x1111}, 416 {0x0006, 0x0821}, 417 {0x0a22, 0x0000}, 418 {0x0a12, 0x0a20}, 419 {0x0a14, 0x05a4}, 420 {0x003e, 0x0000}, 421 {0x0074, 0x081f}, 422 {0x0070, 0x040f}, 423 {0x0804, 0x0300}, 424 {0x0806, 0x0100}, 425 {0x0a04, 0x014a}, 426 {0x090c, 0x0fdc}, 427 {0x090e, 0x002d}, 428 {0x0902, 0x4319}, 429 {0x0914, 0xc10a}, 430 {0x0916, 0x071f}, 431 {0x0918, 0x0408}, 432 {0x091a, 0x0c0d}, 433 {0x091c, 0x0f09}, 434 {0x091e, 0x0a00}, 435 {0x0958, 0xbb80}, 436 }; 437 438 static const struct hi556_reg mode_1296x972_regs[] = { 439 {0x0a00, 0x0000}, 440 {0x0b0a, 0x8259}, 441 {0x0f30, 0x5b15}, 442 {0x0f32, 0x7167}, 443 {0x004a, 0x0100}, 444 {0x004c, 0x0000}, 445 {0x004e, 0x0100}, 446 {0x000c, 0x0122}, 447 {0x0008, 0x0b00}, 448 {0x005a, 0x0404}, 449 {0x0012, 0x000c}, 450 {0x0018, 0x0a33}, 451 {0x0022, 0x0008}, 452 {0x0028, 0x0017}, 453 {0x0024, 0x0022}, 454 {0x002a, 0x002b}, 455 {0x0026, 0x0030}, 456 {0x002c, 0x07c9}, 457 {0x002e, 0x3311}, 458 {0x0030, 0x3311}, 459 {0x0032, 0x3311}, 460 {0x0006, 0x0814}, 461 {0x0a22, 0x0000}, 462 {0x0a12, 0x0510}, 463 {0x0a14, 0x03cc}, 464 {0x003e, 0x0000}, 465 {0x0074, 0x0812}, 466 {0x0070, 0x0409}, 467 {0x0804, 0x0308}, 468 {0x0806, 0x0100}, 469 {0x0a04, 0x016a}, 470 {0x090e, 0x0010}, 471 {0x090c, 0x09c0}, 472 473 {0x0902, 0x4319}, 474 {0x0914, 0xc106}, 475 {0x0916, 0x040e}, 476 {0x0918, 0x0304}, 477 {0x091a, 0x0708}, 478 {0x091c, 0x0e06}, 479 {0x091e, 0x0300}, 480 {0x0958, 0xbb80}, 481 }; 482 483 static const struct hi556_reg mode_1296x722_regs[] = { 484 {0x0a00, 0x0000}, 485 {0x0b0a, 0x8259}, 486 {0x0f30, 0x5b15}, 487 {0x0f32, 0x7167}, 488 {0x004a, 0x0100}, 489 {0x004c, 0x0000}, 490 {0x004e, 0x0100}, 491 {0x000c, 0x0122}, 492 {0x0008, 0x0b00}, 493 {0x005a, 0x0404}, 494 {0x0012, 0x000c}, 495 {0x0018, 0x0a33}, 496 {0x0022, 0x0008}, 497 {0x0028, 0x0017}, 498 {0x0024, 0x0022}, 499 {0x002a, 0x002b}, 500 {0x0026, 0x012a}, 501 {0x002c, 0x06cf}, 502 {0x002e, 0x3311}, 503 {0x0030, 0x3311}, 504 {0x0032, 0x3311}, 505 {0x0006, 0x0814}, 506 {0x0a22, 0x0000}, 507 {0x0a12, 0x0510}, 508 {0x0a14, 0x02d2}, 509 {0x003e, 0x0000}, 510 {0x0074, 0x0812}, 511 {0x0070, 0x0409}, 512 {0x0804, 0x0308}, 513 {0x0806, 0x0100}, 514 {0x0a04, 0x016a}, 515 {0x090c, 0x09c0}, 516 {0x090e, 0x0010}, 517 {0x0902, 0x4319}, 518 {0x0914, 0xc106}, 519 {0x0916, 0x040e}, 520 {0x0918, 0x0304}, 521 {0x091a, 0x0708}, 522 {0x091c, 0x0e06}, 523 {0x091e, 0x0300}, 524 {0x0958, 0xbb80}, 525 }; 526 527 static const char * const hi556_test_pattern_menu[] = { 528 "Disabled", 529 "Solid Colour", 530 "100% Colour Bars", 531 "Fade To Grey Colour Bars", 532 "PN9", 533 "Gradient Horizontal", 534 "Gradient Vertical", 535 "Check Board", 536 "Slant Pattern", 537 }; 538 539 static const s64 link_freq_menu_items[] = { 540 HI556_LINK_FREQ_437MHZ, 541 }; 542 543 static const struct hi556_link_freq_config link_freq_configs[] = { 544 [HI556_LINK_FREQ_437MHZ_INDEX] = { 545 .reg_list = { 546 .num_of_regs = ARRAY_SIZE(mipi_data_rate_874mbps), 547 .regs = mipi_data_rate_874mbps, 548 } 549 } 550 }; 551 552 static const struct hi556_mode supported_modes[] = { 553 { 554 .width = HI556_PIXEL_ARRAY_WIDTH, 555 .height = HI556_PIXEL_ARRAY_HEIGHT, 556 .crop = { 557 .left = HI556_PIXEL_ARRAY_LEFT, 558 .top = HI556_PIXEL_ARRAY_TOP, 559 .width = HI556_PIXEL_ARRAY_WIDTH, 560 .height = HI556_PIXEL_ARRAY_HEIGHT 561 }, 562 .fll_def = HI556_FLL_30FPS, 563 .fll_min = HI556_FLL_30FPS_MIN, 564 .llp = 0x0b00, 565 .reg_list = { 566 .num_of_regs = ARRAY_SIZE(mode_2592x1944_regs), 567 .regs = mode_2592x1944_regs, 568 }, 569 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX, 570 }, 571 { 572 .width = HI556_PIXEL_ARRAY_WIDTH, 573 .height = 1444, 574 .crop = { 575 .left = HI556_PIXEL_ARRAY_LEFT, 576 .top = 250, 577 .width = HI556_PIXEL_ARRAY_WIDTH, 578 .height = 1444 579 }, 580 .fll_def = 0x821, 581 .fll_min = 0x821, 582 .llp = 0x0b00, 583 .reg_list = { 584 .num_of_regs = ARRAY_SIZE(mode_2592x1444_regs), 585 .regs = mode_2592x1444_regs, 586 }, 587 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX, 588 }, 589 { 590 .width = 1296, 591 .height = 972, 592 .crop = { 593 .left = HI556_PIXEL_ARRAY_LEFT, 594 .top = HI556_PIXEL_ARRAY_TOP, 595 .width = HI556_PIXEL_ARRAY_WIDTH, 596 .height = HI556_PIXEL_ARRAY_HEIGHT 597 }, 598 .fll_def = HI556_FLL_30FPS, 599 .fll_min = HI556_FLL_30FPS_MIN, 600 .llp = 0x0b00, 601 .reg_list = { 602 .num_of_regs = ARRAY_SIZE(mode_1296x972_regs), 603 .regs = mode_1296x972_regs, 604 }, 605 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX, 606 }, 607 { 608 .width = 1296, 609 .height = 722, 610 .crop = { 611 .left = HI556_PIXEL_ARRAY_LEFT, 612 .top = 250, 613 .width = HI556_PIXEL_ARRAY_WIDTH, 614 .height = 1444 615 }, 616 .fll_def = HI556_FLL_30FPS, 617 .fll_min = HI556_FLL_30FPS_MIN, 618 .llp = 0x0b00, 619 .reg_list = { 620 .num_of_regs = ARRAY_SIZE(mode_1296x722_regs), 621 .regs = mode_1296x722_regs, 622 }, 623 .link_freq_index = HI556_LINK_FREQ_437MHZ_INDEX, 624 }, 625 }; 626 627 struct hi556 { 628 struct v4l2_subdev sd; 629 struct media_pad pad; 630 struct v4l2_ctrl_handler ctrl_handler; 631 632 /* V4L2 Controls */ 633 struct v4l2_ctrl *link_freq; 634 struct v4l2_ctrl *pixel_rate; 635 struct v4l2_ctrl *vblank; 636 struct v4l2_ctrl *hblank; 637 struct v4l2_ctrl *exposure; 638 639 /* GPIOs, clocks, etc. */ 640 struct gpio_desc *reset_gpio; 641 struct clk *clk; 642 struct regulator *avdd; 643 644 /* Current mode */ 645 const struct hi556_mode *cur_mode; 646 647 /* To serialize asynchronous callbacks */ 648 struct mutex mutex; 649 650 /* True if the device has been identified */ 651 bool identified; 652 }; 653 654 static u64 to_pixel_rate(u32 f_index) 655 { 656 u64 pixel_rate = link_freq_menu_items[f_index] * 2 * HI556_DATA_LANES; 657 658 do_div(pixel_rate, HI556_RGB_DEPTH); 659 660 return pixel_rate; 661 } 662 663 static int hi556_read_reg(struct hi556 *hi556, u16 reg, u16 len, u32 *val) 664 { 665 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 666 struct i2c_msg msgs[2]; 667 u8 addr_buf[2]; 668 u8 data_buf[4] = {0}; 669 int ret; 670 671 if (len > 4) 672 return -EINVAL; 673 674 put_unaligned_be16(reg, addr_buf); 675 msgs[0].addr = client->addr; 676 msgs[0].flags = 0; 677 msgs[0].len = sizeof(addr_buf); 678 msgs[0].buf = addr_buf; 679 msgs[1].addr = client->addr; 680 msgs[1].flags = I2C_M_RD; 681 msgs[1].len = len; 682 msgs[1].buf = &data_buf[4 - len]; 683 684 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); 685 if (ret != ARRAY_SIZE(msgs)) 686 return -EIO; 687 688 *val = get_unaligned_be32(data_buf); 689 690 return 0; 691 } 692 693 static int hi556_write_reg(struct hi556 *hi556, u16 reg, u16 len, u32 val) 694 { 695 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 696 u8 buf[6]; 697 698 if (len > 4) 699 return -EINVAL; 700 701 put_unaligned_be16(reg, buf); 702 put_unaligned_be32(val << 8 * (4 - len), buf + 2); 703 if (i2c_master_send(client, buf, len + 2) != len + 2) 704 return -EIO; 705 706 return 0; 707 } 708 709 static int hi556_write_reg_list(struct hi556 *hi556, 710 const struct hi556_reg_list *r_list) 711 { 712 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 713 unsigned int i; 714 int ret; 715 716 for (i = 0; i < r_list->num_of_regs; i++) { 717 ret = hi556_write_reg(hi556, r_list->regs[i].address, 718 HI556_REG_VALUE_16BIT, 719 r_list->regs[i].val); 720 if (ret) { 721 dev_err_ratelimited(&client->dev, 722 "failed to write reg 0x%4.4x. error = %d", 723 r_list->regs[i].address, ret); 724 return ret; 725 } 726 } 727 728 return 0; 729 } 730 731 static int hi556_update_digital_gain(struct hi556 *hi556, u32 d_gain) 732 { 733 int ret; 734 735 ret = hi556_write_reg(hi556, HI556_REG_MWB_GR_GAIN, 736 HI556_REG_VALUE_16BIT, d_gain); 737 if (ret) 738 return ret; 739 740 ret = hi556_write_reg(hi556, HI556_REG_MWB_GB_GAIN, 741 HI556_REG_VALUE_16BIT, d_gain); 742 if (ret) 743 return ret; 744 745 ret = hi556_write_reg(hi556, HI556_REG_MWB_R_GAIN, 746 HI556_REG_VALUE_16BIT, d_gain); 747 if (ret) 748 return ret; 749 750 return hi556_write_reg(hi556, HI556_REG_MWB_B_GAIN, 751 HI556_REG_VALUE_16BIT, d_gain); 752 } 753 754 static int hi556_test_pattern(struct hi556 *hi556, u32 pattern) 755 { 756 int ret; 757 u32 val; 758 759 if (pattern) { 760 ret = hi556_read_reg(hi556, HI556_REG_ISP, 761 HI556_REG_VALUE_08BIT, &val); 762 if (ret) 763 return ret; 764 765 ret = hi556_write_reg(hi556, HI556_REG_ISP, 766 HI556_REG_VALUE_08BIT, 767 val | HI556_REG_ISP_TPG_EN); 768 if (ret) 769 return ret; 770 } 771 772 return hi556_write_reg(hi556, HI556_REG_TEST_PATTERN, 773 HI556_REG_VALUE_08BIT, pattern); 774 } 775 776 static int hi556_set_ctrl(struct v4l2_ctrl *ctrl) 777 { 778 struct hi556 *hi556 = container_of(ctrl->handler, 779 struct hi556, ctrl_handler); 780 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 781 s64 exposure_max; 782 int ret = 0; 783 784 /* Propagate change of current control to all related controls */ 785 if (ctrl->id == V4L2_CID_VBLANK) { 786 /* Update max exposure while meeting expected vblanking */ 787 exposure_max = hi556->cur_mode->height + ctrl->val - 788 HI556_EXPOSURE_MAX_MARGIN; 789 __v4l2_ctrl_modify_range(hi556->exposure, 790 hi556->exposure->minimum, 791 exposure_max, hi556->exposure->step, 792 exposure_max); 793 } 794 795 /* V4L2 controls values will be applied only when power is already up */ 796 if (!pm_runtime_get_if_in_use(&client->dev)) 797 return 0; 798 799 switch (ctrl->id) { 800 case V4L2_CID_ANALOGUE_GAIN: 801 ret = hi556_write_reg(hi556, HI556_REG_ANALOG_GAIN, 802 HI556_REG_VALUE_16BIT, ctrl->val); 803 break; 804 805 case V4L2_CID_DIGITAL_GAIN: 806 ret = hi556_update_digital_gain(hi556, ctrl->val); 807 break; 808 809 case V4L2_CID_EXPOSURE: 810 ret = hi556_write_reg(hi556, HI556_REG_EXPOSURE, 811 HI556_REG_VALUE_16BIT, ctrl->val); 812 break; 813 814 case V4L2_CID_VBLANK: 815 /* Update FLL that meets expected vertical blanking */ 816 ret = hi556_write_reg(hi556, HI556_REG_FLL, 817 HI556_REG_VALUE_16BIT, 818 hi556->cur_mode->height + ctrl->val); 819 break; 820 821 case V4L2_CID_TEST_PATTERN: 822 ret = hi556_test_pattern(hi556, ctrl->val); 823 break; 824 825 default: 826 ret = -EINVAL; 827 break; 828 } 829 830 pm_runtime_put(&client->dev); 831 832 return ret; 833 } 834 835 static const struct v4l2_ctrl_ops hi556_ctrl_ops = { 836 .s_ctrl = hi556_set_ctrl, 837 }; 838 839 static int hi556_init_controls(struct hi556 *hi556) 840 { 841 struct v4l2_ctrl_handler *ctrl_hdlr; 842 s64 exposure_max, h_blank; 843 int ret; 844 845 ctrl_hdlr = &hi556->ctrl_handler; 846 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8); 847 if (ret) 848 return ret; 849 850 ctrl_hdlr->lock = &hi556->mutex; 851 hi556->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &hi556_ctrl_ops, 852 V4L2_CID_LINK_FREQ, 853 ARRAY_SIZE(link_freq_menu_items) - 1, 854 0, link_freq_menu_items); 855 if (hi556->link_freq) 856 hi556->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 857 858 hi556->pixel_rate = v4l2_ctrl_new_std 859 (ctrl_hdlr, &hi556_ctrl_ops, 860 V4L2_CID_PIXEL_RATE, 0, 861 to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX), 862 1, 863 to_pixel_rate(HI556_LINK_FREQ_437MHZ_INDEX)); 864 hi556->vblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, 865 V4L2_CID_VBLANK, 866 hi556->cur_mode->fll_min - 867 hi556->cur_mode->height, 868 HI556_FLL_MAX - 869 hi556->cur_mode->height, 1, 870 hi556->cur_mode->fll_def - 871 hi556->cur_mode->height); 872 873 h_blank = hi556->cur_mode->llp - hi556->cur_mode->width; 874 875 hi556->hblank = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, 876 V4L2_CID_HBLANK, h_blank, h_blank, 1, 877 h_blank); 878 if (hi556->hblank) 879 hi556->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; 880 881 v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_ANALOGUE_GAIN, 882 HI556_ANAL_GAIN_MIN, HI556_ANAL_GAIN_MAX, 883 HI556_ANAL_GAIN_STEP, HI556_ANAL_GAIN_MIN); 884 v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, V4L2_CID_DIGITAL_GAIN, 885 HI556_DGTL_GAIN_MIN, HI556_DGTL_GAIN_MAX, 886 HI556_DGTL_GAIN_STEP, HI556_DGTL_GAIN_DEFAULT); 887 exposure_max = hi556->cur_mode->fll_def - HI556_EXPOSURE_MAX_MARGIN; 888 hi556->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &hi556_ctrl_ops, 889 V4L2_CID_EXPOSURE, 890 HI556_EXPOSURE_MIN, exposure_max, 891 HI556_EXPOSURE_STEP, 892 exposure_max); 893 v4l2_ctrl_new_std_menu_items(ctrl_hdlr, &hi556_ctrl_ops, 894 V4L2_CID_TEST_PATTERN, 895 ARRAY_SIZE(hi556_test_pattern_menu) - 1, 896 0, 0, hi556_test_pattern_menu); 897 if (ctrl_hdlr->error) 898 return ctrl_hdlr->error; 899 900 hi556->sd.ctrl_handler = ctrl_hdlr; 901 902 return 0; 903 } 904 905 static void hi556_assign_pad_format(const struct hi556_mode *mode, 906 struct v4l2_mbus_framefmt *fmt) 907 { 908 fmt->width = mode->width; 909 fmt->height = mode->height; 910 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; 911 fmt->field = V4L2_FIELD_NONE; 912 } 913 914 static int hi556_identify_module(struct hi556 *hi556) 915 { 916 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 917 int ret; 918 u32 val; 919 920 if (hi556->identified) 921 return 0; 922 923 ret = hi556_read_reg(hi556, HI556_REG_CHIP_ID, 924 HI556_REG_VALUE_16BIT, &val); 925 if (ret) 926 return ret; 927 928 if (val != HI556_CHIP_ID) { 929 dev_err(&client->dev, "chip id mismatch: %x!=%x", 930 HI556_CHIP_ID, val); 931 return -ENXIO; 932 } 933 934 hi556->identified = true; 935 936 return 0; 937 } 938 939 static const struct v4l2_rect * 940 __hi556_get_pad_crop(struct hi556 *hi556, 941 struct v4l2_subdev_state *sd_state, 942 unsigned int pad, enum v4l2_subdev_format_whence which) 943 { 944 switch (which) { 945 case V4L2_SUBDEV_FORMAT_TRY: 946 return v4l2_subdev_state_get_crop(sd_state, pad); 947 case V4L2_SUBDEV_FORMAT_ACTIVE: 948 return &hi556->cur_mode->crop; 949 } 950 951 return NULL; 952 } 953 954 static int hi556_get_selection(struct v4l2_subdev *sd, 955 struct v4l2_subdev_state *sd_state, 956 struct v4l2_subdev_selection *sel) 957 { 958 switch (sel->target) { 959 case V4L2_SEL_TGT_CROP: { 960 struct hi556 *hi556 = to_hi556(sd); 961 962 mutex_lock(&hi556->mutex); 963 sel->r = *__hi556_get_pad_crop(hi556, sd_state, sel->pad, 964 sel->which); 965 mutex_unlock(&hi556->mutex); 966 967 return 0; 968 } 969 970 case V4L2_SEL_TGT_NATIVE_SIZE: 971 sel->r.top = 0; 972 sel->r.left = 0; 973 sel->r.width = HI556_NATIVE_WIDTH; 974 sel->r.height = HI556_NATIVE_HEIGHT; 975 976 return 0; 977 978 case V4L2_SEL_TGT_CROP_DEFAULT: 979 case V4L2_SEL_TGT_CROP_BOUNDS: 980 sel->r.top = HI556_PIXEL_ARRAY_TOP; 981 sel->r.left = HI556_PIXEL_ARRAY_LEFT; 982 sel->r.width = HI556_PIXEL_ARRAY_WIDTH; 983 sel->r.height = HI556_PIXEL_ARRAY_HEIGHT; 984 985 return 0; 986 } 987 988 return -EINVAL; 989 } 990 991 static int hi556_start_streaming(struct hi556 *hi556) 992 { 993 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 994 const struct hi556_reg_list *reg_list; 995 int link_freq_index, ret; 996 997 ret = hi556_identify_module(hi556); 998 if (ret) 999 return ret; 1000 1001 link_freq_index = hi556->cur_mode->link_freq_index; 1002 reg_list = &link_freq_configs[link_freq_index].reg_list; 1003 ret = hi556_write_reg_list(hi556, reg_list); 1004 if (ret) { 1005 dev_err(&client->dev, "failed to set plls"); 1006 return ret; 1007 } 1008 1009 reg_list = &hi556->cur_mode->reg_list; 1010 ret = hi556_write_reg_list(hi556, reg_list); 1011 if (ret) { 1012 dev_err(&client->dev, "failed to set mode"); 1013 return ret; 1014 } 1015 1016 ret = __v4l2_ctrl_handler_setup(hi556->sd.ctrl_handler); 1017 if (ret) 1018 return ret; 1019 1020 ret = hi556_write_reg(hi556, HI556_REG_MODE_SELECT, 1021 HI556_REG_VALUE_16BIT, HI556_MODE_STREAMING); 1022 1023 if (ret) { 1024 dev_err(&client->dev, "failed to set stream"); 1025 return ret; 1026 } 1027 1028 return 0; 1029 } 1030 1031 static void hi556_stop_streaming(struct hi556 *hi556) 1032 { 1033 struct i2c_client *client = v4l2_get_subdevdata(&hi556->sd); 1034 1035 if (hi556_write_reg(hi556, HI556_REG_MODE_SELECT, 1036 HI556_REG_VALUE_16BIT, HI556_MODE_STANDBY)) 1037 dev_err(&client->dev, "failed to set stream"); 1038 } 1039 1040 static int hi556_set_stream(struct v4l2_subdev *sd, int enable) 1041 { 1042 struct hi556 *hi556 = to_hi556(sd); 1043 struct i2c_client *client = v4l2_get_subdevdata(sd); 1044 int ret = 0; 1045 1046 mutex_lock(&hi556->mutex); 1047 if (enable) { 1048 ret = pm_runtime_resume_and_get(&client->dev); 1049 if (ret < 0) { 1050 mutex_unlock(&hi556->mutex); 1051 return ret; 1052 } 1053 1054 ret = hi556_start_streaming(hi556); 1055 if (ret) { 1056 enable = 0; 1057 hi556_stop_streaming(hi556); 1058 pm_runtime_put(&client->dev); 1059 } 1060 } else { 1061 hi556_stop_streaming(hi556); 1062 pm_runtime_put(&client->dev); 1063 } 1064 1065 mutex_unlock(&hi556->mutex); 1066 1067 return ret; 1068 } 1069 1070 static int hi556_set_format(struct v4l2_subdev *sd, 1071 struct v4l2_subdev_state *sd_state, 1072 struct v4l2_subdev_format *fmt) 1073 { 1074 struct hi556 *hi556 = to_hi556(sd); 1075 const struct hi556_mode *mode; 1076 s32 vblank_def, h_blank; 1077 1078 mode = v4l2_find_nearest_size(supported_modes, 1079 ARRAY_SIZE(supported_modes), width, 1080 height, fmt->format.width, 1081 fmt->format.height); 1082 1083 mutex_lock(&hi556->mutex); 1084 hi556_assign_pad_format(mode, &fmt->format); 1085 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1086 *v4l2_subdev_state_get_format(sd_state, fmt->pad) = fmt->format; 1087 } else { 1088 hi556->cur_mode = mode; 1089 __v4l2_ctrl_s_ctrl(hi556->link_freq, mode->link_freq_index); 1090 __v4l2_ctrl_s_ctrl_int64(hi556->pixel_rate, 1091 to_pixel_rate(mode->link_freq_index)); 1092 1093 /* Update limits and set FPS to default */ 1094 vblank_def = mode->fll_def - mode->height; 1095 __v4l2_ctrl_modify_range(hi556->vblank, 1096 mode->fll_min - mode->height, 1097 HI556_FLL_MAX - mode->height, 1, 1098 vblank_def); 1099 __v4l2_ctrl_s_ctrl(hi556->vblank, vblank_def); 1100 1101 h_blank = hi556->cur_mode->llp - hi556->cur_mode->width; 1102 1103 __v4l2_ctrl_modify_range(hi556->hblank, h_blank, h_blank, 1, 1104 h_blank); 1105 } 1106 1107 mutex_unlock(&hi556->mutex); 1108 1109 return 0; 1110 } 1111 1112 static int hi556_get_format(struct v4l2_subdev *sd, 1113 struct v4l2_subdev_state *sd_state, 1114 struct v4l2_subdev_format *fmt) 1115 { 1116 struct hi556 *hi556 = to_hi556(sd); 1117 1118 mutex_lock(&hi556->mutex); 1119 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) 1120 fmt->format = *v4l2_subdev_state_get_format(sd_state, 1121 fmt->pad); 1122 else 1123 hi556_assign_pad_format(hi556->cur_mode, &fmt->format); 1124 1125 mutex_unlock(&hi556->mutex); 1126 1127 return 0; 1128 } 1129 1130 static int hi556_enum_mbus_code(struct v4l2_subdev *sd, 1131 struct v4l2_subdev_state *sd_state, 1132 struct v4l2_subdev_mbus_code_enum *code) 1133 { 1134 if (code->index > 0) 1135 return -EINVAL; 1136 1137 code->code = MEDIA_BUS_FMT_SGRBG10_1X10; 1138 1139 return 0; 1140 } 1141 1142 static int hi556_enum_frame_size(struct v4l2_subdev *sd, 1143 struct v4l2_subdev_state *sd_state, 1144 struct v4l2_subdev_frame_size_enum *fse) 1145 { 1146 if (fse->index >= ARRAY_SIZE(supported_modes)) 1147 return -EINVAL; 1148 1149 if (fse->code != MEDIA_BUS_FMT_SGRBG10_1X10) 1150 return -EINVAL; 1151 1152 fse->min_width = supported_modes[fse->index].width; 1153 fse->max_width = fse->min_width; 1154 fse->min_height = supported_modes[fse->index].height; 1155 fse->max_height = fse->min_height; 1156 1157 return 0; 1158 } 1159 1160 static int hi556_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1161 { 1162 struct hi556 *hi556 = to_hi556(sd); 1163 struct v4l2_rect *try_crop; 1164 1165 mutex_lock(&hi556->mutex); 1166 hi556_assign_pad_format(&supported_modes[0], 1167 v4l2_subdev_state_get_format(fh->state, 0)); 1168 1169 /* Initialize try_crop rectangle. */ 1170 try_crop = v4l2_subdev_state_get_crop(fh->state, 0); 1171 try_crop->top = HI556_PIXEL_ARRAY_TOP; 1172 try_crop->left = HI556_PIXEL_ARRAY_LEFT; 1173 try_crop->width = HI556_PIXEL_ARRAY_WIDTH; 1174 try_crop->height = HI556_PIXEL_ARRAY_HEIGHT; 1175 1176 mutex_unlock(&hi556->mutex); 1177 1178 return 0; 1179 } 1180 1181 static const struct v4l2_subdev_video_ops hi556_video_ops = { 1182 .s_stream = hi556_set_stream, 1183 }; 1184 1185 static const struct v4l2_subdev_pad_ops hi556_pad_ops = { 1186 .set_fmt = hi556_set_format, 1187 .get_fmt = hi556_get_format, 1188 .get_selection = hi556_get_selection, 1189 .enum_mbus_code = hi556_enum_mbus_code, 1190 .enum_frame_size = hi556_enum_frame_size, 1191 }; 1192 1193 static const struct v4l2_subdev_ops hi556_subdev_ops = { 1194 .video = &hi556_video_ops, 1195 .pad = &hi556_pad_ops, 1196 }; 1197 1198 static const struct media_entity_operations hi556_subdev_entity_ops = { 1199 .link_validate = v4l2_subdev_link_validate, 1200 }; 1201 1202 static const struct v4l2_subdev_internal_ops hi556_internal_ops = { 1203 .open = hi556_open, 1204 }; 1205 1206 static int hi556_check_hwcfg(struct device *dev) 1207 { 1208 struct fwnode_handle *ep; 1209 struct fwnode_handle *fwnode = dev_fwnode(dev); 1210 struct v4l2_fwnode_endpoint bus_cfg = { 1211 .bus_type = V4L2_MBUS_CSI2_DPHY 1212 }; 1213 u32 mclk; 1214 int ret = 0; 1215 unsigned int i, j; 1216 1217 /* 1218 * Sometimes the fwnode graph is initialized by the bridge driver, 1219 * wait for this. 1220 */ 1221 ep = fwnode_graph_get_next_endpoint(fwnode, NULL); 1222 if (!ep) 1223 return -EPROBE_DEFER; 1224 1225 ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); 1226 fwnode_handle_put(ep); 1227 if (ret) 1228 return ret; 1229 1230 ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk); 1231 if (ret) { 1232 dev_err(dev, "can't get clock frequency"); 1233 return ret; 1234 } 1235 1236 if (mclk != HI556_MCLK) { 1237 dev_err(dev, "external clock %d is not supported", mclk); 1238 return -EINVAL; 1239 } 1240 1241 if (bus_cfg.bus.mipi_csi2.num_data_lanes != 2) { 1242 dev_err(dev, "number of CSI2 data lanes %d is not supported", 1243 bus_cfg.bus.mipi_csi2.num_data_lanes); 1244 ret = -EINVAL; 1245 goto check_hwcfg_error; 1246 } 1247 1248 if (!bus_cfg.nr_of_link_frequencies) { 1249 dev_err(dev, "no link frequencies defined"); 1250 ret = -EINVAL; 1251 goto check_hwcfg_error; 1252 } 1253 1254 for (i = 0; i < ARRAY_SIZE(link_freq_menu_items); i++) { 1255 for (j = 0; j < bus_cfg.nr_of_link_frequencies; j++) { 1256 if (link_freq_menu_items[i] == 1257 bus_cfg.link_frequencies[j]) 1258 break; 1259 } 1260 1261 if (j == bus_cfg.nr_of_link_frequencies) { 1262 dev_err(dev, "no link frequency %lld supported", 1263 link_freq_menu_items[i]); 1264 ret = -EINVAL; 1265 goto check_hwcfg_error; 1266 } 1267 } 1268 1269 check_hwcfg_error: 1270 v4l2_fwnode_endpoint_free(&bus_cfg); 1271 1272 return ret; 1273 } 1274 1275 static void hi556_remove(struct i2c_client *client) 1276 { 1277 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1278 struct hi556 *hi556 = to_hi556(sd); 1279 1280 v4l2_async_unregister_subdev(sd); 1281 media_entity_cleanup(&sd->entity); 1282 v4l2_ctrl_handler_free(sd->ctrl_handler); 1283 pm_runtime_disable(&client->dev); 1284 mutex_destroy(&hi556->mutex); 1285 } 1286 1287 static int hi556_suspend(struct device *dev) 1288 { 1289 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1290 struct hi556 *hi556 = to_hi556(sd); 1291 int ret; 1292 1293 gpiod_set_value_cansleep(hi556->reset_gpio, 1); 1294 1295 ret = regulator_disable(hi556->avdd); 1296 if (ret) { 1297 dev_err(dev, "failed to disable avdd: %d\n", ret); 1298 gpiod_set_value_cansleep(hi556->reset_gpio, 0); 1299 return ret; 1300 } 1301 1302 clk_disable_unprepare(hi556->clk); 1303 return 0; 1304 } 1305 1306 static int hi556_resume(struct device *dev) 1307 { 1308 struct v4l2_subdev *sd = dev_get_drvdata(dev); 1309 struct hi556 *hi556 = to_hi556(sd); 1310 int ret; 1311 1312 ret = clk_prepare_enable(hi556->clk); 1313 if (ret) 1314 return ret; 1315 1316 ret = regulator_enable(hi556->avdd); 1317 if (ret) { 1318 dev_err(dev, "failed to enable avdd: %d\n", ret); 1319 clk_disable_unprepare(hi556->clk); 1320 return ret; 1321 } 1322 1323 gpiod_set_value_cansleep(hi556->reset_gpio, 0); 1324 usleep_range(5000, 5500); 1325 return 0; 1326 } 1327 1328 static int hi556_probe(struct i2c_client *client) 1329 { 1330 struct hi556 *hi556; 1331 bool full_power; 1332 int ret; 1333 1334 ret = hi556_check_hwcfg(&client->dev); 1335 if (ret) { 1336 dev_err(&client->dev, "failed to check HW configuration: %d", 1337 ret); 1338 return ret; 1339 } 1340 1341 hi556 = devm_kzalloc(&client->dev, sizeof(*hi556), GFP_KERNEL); 1342 if (!hi556) 1343 return -ENOMEM; 1344 1345 v4l2_i2c_subdev_init(&hi556->sd, client, &hi556_subdev_ops); 1346 1347 hi556->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", 1348 GPIOD_OUT_HIGH); 1349 if (IS_ERR(hi556->reset_gpio)) 1350 return dev_err_probe(&client->dev, PTR_ERR(hi556->reset_gpio), 1351 "failed to get reset GPIO\n"); 1352 1353 hi556->clk = devm_clk_get_optional(&client->dev, "clk"); 1354 if (IS_ERR(hi556->clk)) 1355 return dev_err_probe(&client->dev, PTR_ERR(hi556->clk), 1356 "failed to get clock\n"); 1357 1358 /* The regulator core will provide a "dummy" regulator if necessary */ 1359 hi556->avdd = devm_regulator_get(&client->dev, "avdd"); 1360 if (IS_ERR(hi556->avdd)) 1361 return dev_err_probe(&client->dev, PTR_ERR(hi556->avdd), 1362 "failed to get avdd regulator\n"); 1363 1364 full_power = acpi_dev_state_d0(&client->dev); 1365 if (full_power) { 1366 /* Ensure non ACPI managed resources are enabled */ 1367 ret = hi556_resume(&client->dev); 1368 if (ret) 1369 return dev_err_probe(&client->dev, ret, 1370 "failed to power on sensor\n"); 1371 1372 ret = hi556_identify_module(hi556); 1373 if (ret) { 1374 dev_err(&client->dev, "failed to find sensor: %d", ret); 1375 goto probe_error_power_off; 1376 } 1377 } 1378 1379 mutex_init(&hi556->mutex); 1380 hi556->cur_mode = &supported_modes[0]; 1381 ret = hi556_init_controls(hi556); 1382 if (ret) { 1383 dev_err(&client->dev, "failed to init controls: %d", ret); 1384 goto probe_error_v4l2_ctrl_handler_free; 1385 } 1386 1387 hi556->sd.internal_ops = &hi556_internal_ops; 1388 hi556->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1389 hi556->sd.entity.ops = &hi556_subdev_entity_ops; 1390 hi556->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1391 hi556->pad.flags = MEDIA_PAD_FL_SOURCE; 1392 ret = media_entity_pads_init(&hi556->sd.entity, 1, &hi556->pad); 1393 if (ret) { 1394 dev_err(&client->dev, "failed to init entity pads: %d", ret); 1395 goto probe_error_v4l2_ctrl_handler_free; 1396 } 1397 1398 ret = v4l2_async_register_subdev_sensor(&hi556->sd); 1399 if (ret < 0) { 1400 dev_err(&client->dev, "failed to register V4L2 subdev: %d", 1401 ret); 1402 goto probe_error_media_entity_cleanup; 1403 } 1404 1405 /* Set the device's state to active if it's in D0 state. */ 1406 if (full_power) 1407 pm_runtime_set_active(&client->dev); 1408 pm_runtime_enable(&client->dev); 1409 pm_runtime_idle(&client->dev); 1410 1411 return 0; 1412 1413 probe_error_media_entity_cleanup: 1414 media_entity_cleanup(&hi556->sd.entity); 1415 1416 probe_error_v4l2_ctrl_handler_free: 1417 v4l2_ctrl_handler_free(hi556->sd.ctrl_handler); 1418 mutex_destroy(&hi556->mutex); 1419 1420 probe_error_power_off: 1421 if (full_power) 1422 hi556_suspend(&client->dev); 1423 1424 return ret; 1425 } 1426 1427 static DEFINE_RUNTIME_DEV_PM_OPS(hi556_pm_ops, hi556_suspend, hi556_resume, 1428 NULL); 1429 1430 #ifdef CONFIG_ACPI 1431 static const struct acpi_device_id hi556_acpi_ids[] = { 1432 {"INT3537"}, 1433 {} 1434 }; 1435 1436 MODULE_DEVICE_TABLE(acpi, hi556_acpi_ids); 1437 #endif 1438 1439 static struct i2c_driver hi556_i2c_driver = { 1440 .driver = { 1441 .name = "hi556", 1442 .acpi_match_table = ACPI_PTR(hi556_acpi_ids), 1443 .pm = pm_sleep_ptr(&hi556_pm_ops), 1444 }, 1445 .probe = hi556_probe, 1446 .remove = hi556_remove, 1447 .flags = I2C_DRV_ACPI_WAIVE_D0_PROBE, 1448 }; 1449 1450 module_i2c_driver(hi556_i2c_driver); 1451 1452 MODULE_AUTHOR("Shawn Tu"); 1453 MODULE_DESCRIPTION("Hynix HI556 sensor driver"); 1454 MODULE_LICENSE("GPL v2"); 1455