1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Driver for the OV7251 camera sensor. 4 * 5 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. 6 * Copyright (c) 2017-2018, Linaro Ltd. 7 */ 8 9 #include <linux/bitops.h> 10 #include <linux/clk.h> 11 #include <linux/delay.h> 12 #include <linux/device.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/i2c.h> 15 #include <linux/init.h> 16 #include <linux/module.h> 17 #include <linux/mod_devicetable.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/regulator/consumer.h> 20 #include <linux/slab.h> 21 #include <linux/types.h> 22 #include <media/v4l2-ctrls.h> 23 #include <media/v4l2-fwnode.h> 24 #include <media/v4l2-subdev.h> 25 26 #define OV7251_SC_MODE_SELECT 0x0100 27 #define OV7251_SC_MODE_SELECT_SW_STANDBY 0x0 28 #define OV7251_SC_MODE_SELECT_STREAMING 0x1 29 30 #define OV7251_CHIP_ID_HIGH 0x300a 31 #define OV7251_CHIP_ID_HIGH_BYTE 0x77 32 #define OV7251_CHIP_ID_LOW 0x300b 33 #define OV7251_CHIP_ID_LOW_BYTE 0x50 34 #define OV7251_SC_GP_IO_IN1 0x3029 35 #define OV7251_AEC_EXPO_0 0x3500 36 #define OV7251_AEC_EXPO_1 0x3501 37 #define OV7251_AEC_EXPO_2 0x3502 38 #define OV7251_AEC_AGC_ADJ_0 0x350a 39 #define OV7251_AEC_AGC_ADJ_1 0x350b 40 #define OV7251_TIMING_FORMAT1 0x3820 41 #define OV7251_TIMING_FORMAT1_VFLIP BIT(2) 42 #define OV7251_TIMING_FORMAT2 0x3821 43 #define OV7251_TIMING_FORMAT2_MIRROR BIT(2) 44 #define OV7251_PRE_ISP_00 0x5e00 45 #define OV7251_PRE_ISP_00_TEST_PATTERN BIT(7) 46 #define OV7251_PLL1_PRE_DIV_REG 0x30b4 47 #define OV7251_PLL1_MULT_REG 0x30b3 48 #define OV7251_PLL1_DIVIDER_REG 0x30b1 49 #define OV7251_PLL1_PIX_DIV_REG 0x30b0 50 #define OV7251_PLL1_MIPI_DIV_REG 0x30b5 51 #define OV7251_PLL2_PRE_DIV_REG 0x3098 52 #define OV7251_PLL2_MULT_REG 0x3099 53 #define OV7251_PLL2_DIVIDER_REG 0x309d 54 #define OV7251_PLL2_SYS_DIV_REG 0x309a 55 #define OV7251_PLL2_ADC_DIV_REG 0x309b 56 57 #define OV7251_NATIVE_WIDTH 656 58 #define OV7251_NATIVE_HEIGHT 496 59 #define OV7251_ACTIVE_START_LEFT 4 60 #define OV7251_ACTIVE_START_TOP 4 61 #define OV7251_ACTIVE_WIDTH 648 62 #define OV7251_ACTIVE_HEIGHT 488 63 64 #define OV7251_FIXED_PPL 928 65 #define OV7251_TIMING_VTS_REG 0x380e 66 #define OV7251_TIMING_MIN_VTS 1 67 #define OV7251_TIMING_MAX_VTS 0xffff 68 #define OV7251_INTEGRATION_MARGIN 20 69 70 struct reg_value { 71 u16 reg; 72 u8 val; 73 }; 74 75 struct ov7251_mode_info { 76 u32 width; 77 u32 height; 78 u32 vts; 79 const struct reg_value *data; 80 u32 data_size; 81 u32 pixel_clock; 82 u32 link_freq; 83 u16 exposure_max; 84 u16 exposure_def; 85 struct v4l2_fract timeperframe; 86 }; 87 88 struct ov7251_pll1_cfg { 89 unsigned int pre_div; 90 unsigned int mult; 91 unsigned int div; 92 unsigned int pix_div; 93 unsigned int mipi_div; 94 }; 95 96 struct ov7251_pll2_cfg { 97 unsigned int pre_div; 98 unsigned int mult; 99 unsigned int div; 100 unsigned int sys_div; 101 unsigned int adc_div; 102 }; 103 104 /* 105 * Rubbish ordering, but only PLL1 needs to have a separate configuration per 106 * link frequency and the array member needs to be last. 107 */ 108 struct ov7251_pll_cfgs { 109 const struct ov7251_pll2_cfg *pll2; 110 const struct ov7251_pll1_cfg *pll1[]; 111 }; 112 113 enum xclk_rate { 114 OV7251_19_2_MHZ, 115 OV7251_24_MHZ, 116 OV7251_NUM_SUPPORTED_RATES 117 }; 118 119 enum supported_link_freqs { 120 OV7251_LINK_FREQ_240_MHZ, 121 OV7251_LINK_FREQ_319_2_MHZ, 122 OV7251_NUM_SUPPORTED_LINK_FREQS 123 }; 124 125 struct ov7251 { 126 struct i2c_client *i2c_client; 127 struct device *dev; 128 struct v4l2_subdev sd; 129 struct media_pad pad; 130 struct v4l2_fwnode_endpoint ep; 131 struct v4l2_mbus_framefmt fmt; 132 struct v4l2_rect crop; 133 struct clk *xclk; 134 u32 xclk_freq; 135 136 struct regulator *io_regulator; 137 struct regulator *core_regulator; 138 struct regulator *analog_regulator; 139 140 const struct ov7251_pll_cfgs *pll_cfgs; 141 enum supported_link_freqs link_freq_idx; 142 const struct ov7251_mode_info *current_mode; 143 144 struct v4l2_ctrl_handler ctrls; 145 struct v4l2_ctrl *pixel_clock; 146 struct v4l2_ctrl *link_freq; 147 struct v4l2_ctrl *exposure; 148 struct v4l2_ctrl *gain; 149 struct v4l2_ctrl *hblank; 150 struct v4l2_ctrl *vblank; 151 152 /* Cached register values */ 153 u8 aec_pk_manual; 154 u8 pre_isp_00; 155 u8 timing_format1; 156 u8 timing_format2; 157 158 struct mutex lock; /* lock to protect power state, ctrls and mode */ 159 bool power_on; 160 161 struct gpio_desc *enable_gpio; 162 }; 163 164 static inline struct ov7251 *to_ov7251(struct v4l2_subdev *sd) 165 { 166 return container_of(sd, struct ov7251, sd); 167 } 168 169 static const struct ov7251_pll1_cfg ov7251_pll1_cfg_19_2_mhz_240_mhz = { 170 .pre_div = 0x03, 171 .mult = 0x4b, 172 .div = 0x01, 173 .pix_div = 0x0a, 174 .mipi_div = 0x05, 175 }; 176 177 static const struct ov7251_pll1_cfg ov7251_pll1_cfg_19_2_mhz_319_2_mhz = { 178 .pre_div = 0x01, 179 .mult = 0x85, 180 .div = 0x04, 181 .pix_div = 0x0a, 182 .mipi_div = 0x05, 183 }; 184 185 static const struct ov7251_pll1_cfg ov7251_pll1_cfg_24_mhz_240_mhz = { 186 .pre_div = 0x03, 187 .mult = 0x64, 188 .div = 0x01, 189 .pix_div = 0x0a, 190 .mipi_div = 0x05, 191 }; 192 193 static const struct ov7251_pll1_cfg ov7251_pll1_cfg_24_mhz_319_2_mhz = { 194 .pre_div = 0x05, 195 .mult = 0x85, 196 .div = 0x02, 197 .pix_div = 0x0a, 198 .mipi_div = 0x05, 199 }; 200 201 static const struct ov7251_pll2_cfg ov7251_pll2_cfg_19_2_mhz = { 202 .pre_div = 0x04, 203 .mult = 0x32, 204 .div = 0x00, 205 .sys_div = 0x05, 206 .adc_div = 0x04, 207 }; 208 209 static const struct ov7251_pll2_cfg ov7251_pll2_cfg_24_mhz = { 210 .pre_div = 0x04, 211 .mult = 0x28, 212 .div = 0x00, 213 .sys_div = 0x05, 214 .adc_div = 0x04, 215 }; 216 217 static const struct ov7251_pll_cfgs ov7251_pll_cfgs_19_2_mhz = { 218 .pll2 = &ov7251_pll2_cfg_19_2_mhz, 219 .pll1 = { 220 [OV7251_LINK_FREQ_240_MHZ] = &ov7251_pll1_cfg_19_2_mhz_240_mhz, 221 [OV7251_LINK_FREQ_319_2_MHZ] = &ov7251_pll1_cfg_19_2_mhz_319_2_mhz, 222 }, 223 }; 224 225 static const struct ov7251_pll_cfgs ov7251_pll_cfgs_24_mhz = { 226 .pll2 = &ov7251_pll2_cfg_24_mhz, 227 .pll1 = { 228 [OV7251_LINK_FREQ_240_MHZ] = &ov7251_pll1_cfg_24_mhz_240_mhz, 229 [OV7251_LINK_FREQ_319_2_MHZ] = &ov7251_pll1_cfg_24_mhz_319_2_mhz, 230 }, 231 }; 232 233 static const struct ov7251_pll_cfgs *ov7251_pll_cfgs[] = { 234 [OV7251_19_2_MHZ] = &ov7251_pll_cfgs_19_2_mhz, 235 [OV7251_24_MHZ] = &ov7251_pll_cfgs_24_mhz, 236 }; 237 238 static const struct reg_value ov7251_global_init_setting[] = { 239 { 0x0103, 0x01 }, 240 { 0x303b, 0x02 }, 241 }; 242 243 static const struct reg_value ov7251_setting_vga_30fps[] = { 244 { 0x3005, 0x00 }, 245 { 0x3012, 0xc0 }, 246 { 0x3013, 0xd2 }, 247 { 0x3014, 0x04 }, 248 { 0x3016, 0xf0 }, 249 { 0x3017, 0xf0 }, 250 { 0x3018, 0xf0 }, 251 { 0x301a, 0xf0 }, 252 { 0x301b, 0xf0 }, 253 { 0x301c, 0xf0 }, 254 { 0x3023, 0x05 }, 255 { 0x3037, 0xf0 }, 256 { 0x3106, 0xda }, 257 { 0x3503, 0x07 }, 258 { 0x3509, 0x10 }, 259 { 0x3600, 0x1c }, 260 { 0x3602, 0x62 }, 261 { 0x3620, 0xb7 }, 262 { 0x3622, 0x04 }, 263 { 0x3626, 0x21 }, 264 { 0x3627, 0x30 }, 265 { 0x3630, 0x44 }, 266 { 0x3631, 0x35 }, 267 { 0x3634, 0x60 }, 268 { 0x3636, 0x00 }, 269 { 0x3662, 0x01 }, 270 { 0x3663, 0x70 }, 271 { 0x3664, 0x50 }, 272 { 0x3666, 0x0a }, 273 { 0x3669, 0x1a }, 274 { 0x366a, 0x00 }, 275 { 0x366b, 0x50 }, 276 { 0x3673, 0x01 }, 277 { 0x3674, 0xff }, 278 { 0x3675, 0x03 }, 279 { 0x3705, 0xc1 }, 280 { 0x3709, 0x40 }, 281 { 0x373c, 0x08 }, 282 { 0x3742, 0x00 }, 283 { 0x3757, 0xb3 }, 284 { 0x3788, 0x00 }, 285 { 0x37a8, 0x01 }, 286 { 0x37a9, 0xc0 }, 287 { 0x3800, 0x00 }, 288 { 0x3801, 0x04 }, 289 { 0x3802, 0x00 }, 290 { 0x3803, 0x04 }, 291 { 0x3804, 0x02 }, 292 { 0x3805, 0x8b }, 293 { 0x3806, 0x01 }, 294 { 0x3807, 0xeb }, 295 { 0x3808, 0x02 }, /* width high */ 296 { 0x3809, 0x80 }, /* width low */ 297 { 0x380a, 0x01 }, /* height high */ 298 { 0x380b, 0xe0 }, /* height low */ 299 { 0x380c, 0x03 }, /* total horiz timing high */ 300 { 0x380d, 0xa0 }, /* total horiz timing low */ 301 { 0x380e, 0x06 }, /* total vertical timing high */ 302 { 0x380f, 0xbc }, /* total vertical timing low */ 303 { 0x3810, 0x00 }, 304 { 0x3811, 0x04 }, 305 { 0x3812, 0x00 }, 306 { 0x3813, 0x05 }, 307 { 0x3814, 0x11 }, 308 { 0x3815, 0x11 }, 309 { 0x3820, 0x40 }, 310 { 0x3821, 0x00 }, 311 { 0x382f, 0x0e }, 312 { 0x3832, 0x00 }, 313 { 0x3833, 0x05 }, 314 { 0x3834, 0x00 }, 315 { 0x3835, 0x0c }, 316 { 0x3837, 0x00 }, 317 { 0x3b80, 0x00 }, 318 { 0x3b81, 0xa5 }, 319 { 0x3b82, 0x10 }, 320 { 0x3b83, 0x00 }, 321 { 0x3b84, 0x08 }, 322 { 0x3b85, 0x00 }, 323 { 0x3b86, 0x01 }, 324 { 0x3b87, 0x00 }, 325 { 0x3b88, 0x00 }, 326 { 0x3b89, 0x00 }, 327 { 0x3b8a, 0x00 }, 328 { 0x3b8b, 0x05 }, 329 { 0x3b8c, 0x00 }, 330 { 0x3b8d, 0x00 }, 331 { 0x3b8e, 0x00 }, 332 { 0x3b8f, 0x1a }, 333 { 0x3b94, 0x05 }, 334 { 0x3b95, 0xf2 }, 335 { 0x3b96, 0x40 }, 336 { 0x3c00, 0x89 }, 337 { 0x3c01, 0x63 }, 338 { 0x3c02, 0x01 }, 339 { 0x3c03, 0x00 }, 340 { 0x3c04, 0x00 }, 341 { 0x3c05, 0x03 }, 342 { 0x3c06, 0x00 }, 343 { 0x3c07, 0x06 }, 344 { 0x3c0c, 0x01 }, 345 { 0x3c0d, 0xd0 }, 346 { 0x3c0e, 0x02 }, 347 { 0x3c0f, 0x0a }, 348 { 0x4001, 0x42 }, 349 { 0x4004, 0x04 }, 350 { 0x4005, 0x00 }, 351 { 0x404e, 0x01 }, 352 { 0x4300, 0xff }, 353 { 0x4301, 0x00 }, 354 { 0x4315, 0x00 }, 355 { 0x4501, 0x48 }, 356 { 0x4600, 0x00 }, 357 { 0x4601, 0x4e }, 358 { 0x4801, 0x0f }, 359 { 0x4806, 0x0f }, 360 { 0x4819, 0xaa }, 361 { 0x4823, 0x3e }, 362 { 0x4837, 0x19 }, 363 { 0x4a0d, 0x00 }, 364 { 0x4a47, 0x7f }, 365 { 0x4a49, 0xf0 }, 366 { 0x4a4b, 0x30 }, 367 { 0x5000, 0x85 }, 368 { 0x5001, 0x80 }, 369 }; 370 371 static const struct reg_value ov7251_setting_vga_60fps[] = { 372 { 0x3005, 0x00 }, 373 { 0x3012, 0xc0 }, 374 { 0x3013, 0xd2 }, 375 { 0x3014, 0x04 }, 376 { 0x3016, 0x10 }, 377 { 0x3017, 0x00 }, 378 { 0x3018, 0x00 }, 379 { 0x301a, 0x00 }, 380 { 0x301b, 0x00 }, 381 { 0x301c, 0x00 }, 382 { 0x3023, 0x05 }, 383 { 0x3037, 0xf0 }, 384 { 0x3106, 0xda }, 385 { 0x3503, 0x07 }, 386 { 0x3509, 0x10 }, 387 { 0x3600, 0x1c }, 388 { 0x3602, 0x62 }, 389 { 0x3620, 0xb7 }, 390 { 0x3622, 0x04 }, 391 { 0x3626, 0x21 }, 392 { 0x3627, 0x30 }, 393 { 0x3630, 0x44 }, 394 { 0x3631, 0x35 }, 395 { 0x3634, 0x60 }, 396 { 0x3636, 0x00 }, 397 { 0x3662, 0x01 }, 398 { 0x3663, 0x70 }, 399 { 0x3664, 0x50 }, 400 { 0x3666, 0x0a }, 401 { 0x3669, 0x1a }, 402 { 0x366a, 0x00 }, 403 { 0x366b, 0x50 }, 404 { 0x3673, 0x01 }, 405 { 0x3674, 0xff }, 406 { 0x3675, 0x03 }, 407 { 0x3705, 0xc1 }, 408 { 0x3709, 0x40 }, 409 { 0x373c, 0x08 }, 410 { 0x3742, 0x00 }, 411 { 0x3757, 0xb3 }, 412 { 0x3788, 0x00 }, 413 { 0x37a8, 0x01 }, 414 { 0x37a9, 0xc0 }, 415 { 0x3800, 0x00 }, 416 { 0x3801, 0x04 }, 417 { 0x3802, 0x00 }, 418 { 0x3803, 0x04 }, 419 { 0x3804, 0x02 }, 420 { 0x3805, 0x8b }, 421 { 0x3806, 0x01 }, 422 { 0x3807, 0xeb }, 423 { 0x3808, 0x02 }, /* width high */ 424 { 0x3809, 0x80 }, /* width low */ 425 { 0x380a, 0x01 }, /* height high */ 426 { 0x380b, 0xe0 }, /* height low */ 427 { 0x380c, 0x03 }, /* total horiz timing high */ 428 { 0x380d, 0xa0 }, /* total horiz timing low */ 429 { 0x380e, 0x03 }, /* total vertical timing high */ 430 { 0x380f, 0x5c }, /* total vertical timing low */ 431 { 0x3810, 0x00 }, 432 { 0x3811, 0x04 }, 433 { 0x3812, 0x00 }, 434 { 0x3813, 0x05 }, 435 { 0x3814, 0x11 }, 436 { 0x3815, 0x11 }, 437 { 0x3820, 0x40 }, 438 { 0x3821, 0x00 }, 439 { 0x382f, 0x0e }, 440 { 0x3832, 0x00 }, 441 { 0x3833, 0x05 }, 442 { 0x3834, 0x00 }, 443 { 0x3835, 0x0c }, 444 { 0x3837, 0x00 }, 445 { 0x3b80, 0x00 }, 446 { 0x3b81, 0xa5 }, 447 { 0x3b82, 0x10 }, 448 { 0x3b83, 0x00 }, 449 { 0x3b84, 0x08 }, 450 { 0x3b85, 0x00 }, 451 { 0x3b86, 0x01 }, 452 { 0x3b87, 0x00 }, 453 { 0x3b88, 0x00 }, 454 { 0x3b89, 0x00 }, 455 { 0x3b8a, 0x00 }, 456 { 0x3b8b, 0x05 }, 457 { 0x3b8c, 0x00 }, 458 { 0x3b8d, 0x00 }, 459 { 0x3b8e, 0x00 }, 460 { 0x3b8f, 0x1a }, 461 { 0x3b94, 0x05 }, 462 { 0x3b95, 0xf2 }, 463 { 0x3b96, 0x40 }, 464 { 0x3c00, 0x89 }, 465 { 0x3c01, 0x63 }, 466 { 0x3c02, 0x01 }, 467 { 0x3c03, 0x00 }, 468 { 0x3c04, 0x00 }, 469 { 0x3c05, 0x03 }, 470 { 0x3c06, 0x00 }, 471 { 0x3c07, 0x06 }, 472 { 0x3c0c, 0x01 }, 473 { 0x3c0d, 0xd0 }, 474 { 0x3c0e, 0x02 }, 475 { 0x3c0f, 0x0a }, 476 { 0x4001, 0x42 }, 477 { 0x4004, 0x04 }, 478 { 0x4005, 0x00 }, 479 { 0x404e, 0x01 }, 480 { 0x4300, 0xff }, 481 { 0x4301, 0x00 }, 482 { 0x4315, 0x00 }, 483 { 0x4501, 0x48 }, 484 { 0x4600, 0x00 }, 485 { 0x4601, 0x4e }, 486 { 0x4801, 0x0f }, 487 { 0x4806, 0x0f }, 488 { 0x4819, 0xaa }, 489 { 0x4823, 0x3e }, 490 { 0x4837, 0x19 }, 491 { 0x4a0d, 0x00 }, 492 { 0x4a47, 0x7f }, 493 { 0x4a49, 0xf0 }, 494 { 0x4a4b, 0x30 }, 495 { 0x5000, 0x85 }, 496 { 0x5001, 0x80 }, 497 }; 498 499 static const struct reg_value ov7251_setting_vga_90fps[] = { 500 { 0x3005, 0x00 }, 501 { 0x3012, 0xc0 }, 502 { 0x3013, 0xd2 }, 503 { 0x3014, 0x04 }, 504 { 0x3016, 0x10 }, 505 { 0x3017, 0x00 }, 506 { 0x3018, 0x00 }, 507 { 0x301a, 0x00 }, 508 { 0x301b, 0x00 }, 509 { 0x301c, 0x00 }, 510 { 0x3023, 0x05 }, 511 { 0x3037, 0xf0 }, 512 { 0x3106, 0xda }, 513 { 0x3503, 0x07 }, 514 { 0x3509, 0x10 }, 515 { 0x3600, 0x1c }, 516 { 0x3602, 0x62 }, 517 { 0x3620, 0xb7 }, 518 { 0x3622, 0x04 }, 519 { 0x3626, 0x21 }, 520 { 0x3627, 0x30 }, 521 { 0x3630, 0x44 }, 522 { 0x3631, 0x35 }, 523 { 0x3634, 0x60 }, 524 { 0x3636, 0x00 }, 525 { 0x3662, 0x01 }, 526 { 0x3663, 0x70 }, 527 { 0x3664, 0x50 }, 528 { 0x3666, 0x0a }, 529 { 0x3669, 0x1a }, 530 { 0x366a, 0x00 }, 531 { 0x366b, 0x50 }, 532 { 0x3673, 0x01 }, 533 { 0x3674, 0xff }, 534 { 0x3675, 0x03 }, 535 { 0x3705, 0xc1 }, 536 { 0x3709, 0x40 }, 537 { 0x373c, 0x08 }, 538 { 0x3742, 0x00 }, 539 { 0x3757, 0xb3 }, 540 { 0x3788, 0x00 }, 541 { 0x37a8, 0x01 }, 542 { 0x37a9, 0xc0 }, 543 { 0x3800, 0x00 }, 544 { 0x3801, 0x04 }, 545 { 0x3802, 0x00 }, 546 { 0x3803, 0x04 }, 547 { 0x3804, 0x02 }, 548 { 0x3805, 0x8b }, 549 { 0x3806, 0x01 }, 550 { 0x3807, 0xeb }, 551 { 0x3808, 0x02 }, /* width high */ 552 { 0x3809, 0x80 }, /* width low */ 553 { 0x380a, 0x01 }, /* height high */ 554 { 0x380b, 0xe0 }, /* height low */ 555 { 0x380c, 0x03 }, /* total horiz timing high */ 556 { 0x380d, 0xa0 }, /* total horiz timing low */ 557 { 0x380e, 0x02 }, /* total vertical timing high */ 558 { 0x380f, 0x3c }, /* total vertical timing low */ 559 { 0x3810, 0x00 }, 560 { 0x3811, 0x04 }, 561 { 0x3812, 0x00 }, 562 { 0x3813, 0x05 }, 563 { 0x3814, 0x11 }, 564 { 0x3815, 0x11 }, 565 { 0x3820, 0x40 }, 566 { 0x3821, 0x00 }, 567 { 0x382f, 0x0e }, 568 { 0x3832, 0x00 }, 569 { 0x3833, 0x05 }, 570 { 0x3834, 0x00 }, 571 { 0x3835, 0x0c }, 572 { 0x3837, 0x00 }, 573 { 0x3b80, 0x00 }, 574 { 0x3b81, 0xa5 }, 575 { 0x3b82, 0x10 }, 576 { 0x3b83, 0x00 }, 577 { 0x3b84, 0x08 }, 578 { 0x3b85, 0x00 }, 579 { 0x3b86, 0x01 }, 580 { 0x3b87, 0x00 }, 581 { 0x3b88, 0x00 }, 582 { 0x3b89, 0x00 }, 583 { 0x3b8a, 0x00 }, 584 { 0x3b8b, 0x05 }, 585 { 0x3b8c, 0x00 }, 586 { 0x3b8d, 0x00 }, 587 { 0x3b8e, 0x00 }, 588 { 0x3b8f, 0x1a }, 589 { 0x3b94, 0x05 }, 590 { 0x3b95, 0xf2 }, 591 { 0x3b96, 0x40 }, 592 { 0x3c00, 0x89 }, 593 { 0x3c01, 0x63 }, 594 { 0x3c02, 0x01 }, 595 { 0x3c03, 0x00 }, 596 { 0x3c04, 0x00 }, 597 { 0x3c05, 0x03 }, 598 { 0x3c06, 0x00 }, 599 { 0x3c07, 0x06 }, 600 { 0x3c0c, 0x01 }, 601 { 0x3c0d, 0xd0 }, 602 { 0x3c0e, 0x02 }, 603 { 0x3c0f, 0x0a }, 604 { 0x4001, 0x42 }, 605 { 0x4004, 0x04 }, 606 { 0x4005, 0x00 }, 607 { 0x404e, 0x01 }, 608 { 0x4300, 0xff }, 609 { 0x4301, 0x00 }, 610 { 0x4315, 0x00 }, 611 { 0x4501, 0x48 }, 612 { 0x4600, 0x00 }, 613 { 0x4601, 0x4e }, 614 { 0x4801, 0x0f }, 615 { 0x4806, 0x0f }, 616 { 0x4819, 0xaa }, 617 { 0x4823, 0x3e }, 618 { 0x4837, 0x19 }, 619 { 0x4a0d, 0x00 }, 620 { 0x4a47, 0x7f }, 621 { 0x4a49, 0xf0 }, 622 { 0x4a4b, 0x30 }, 623 { 0x5000, 0x85 }, 624 { 0x5001, 0x80 }, 625 }; 626 627 static const unsigned long supported_xclk_rates[] = { 628 [OV7251_19_2_MHZ] = 19200000, 629 [OV7251_24_MHZ] = 24000000, 630 }; 631 632 static const s64 link_freq[] = { 633 [OV7251_LINK_FREQ_240_MHZ] = 240000000, 634 [OV7251_LINK_FREQ_319_2_MHZ] = 319200000, 635 }; 636 637 static const s64 pixel_rates[] = { 638 [OV7251_LINK_FREQ_240_MHZ] = 48000000, 639 [OV7251_LINK_FREQ_319_2_MHZ] = 63840000, 640 }; 641 642 static const struct ov7251_mode_info ov7251_mode_info_data[] = { 643 { 644 .width = 640, 645 .height = 480, 646 .vts = 1724, 647 .data = ov7251_setting_vga_30fps, 648 .data_size = ARRAY_SIZE(ov7251_setting_vga_30fps), 649 .exposure_max = 1704, 650 .exposure_def = 504, 651 .timeperframe = { 652 .numerator = 100, 653 .denominator = 3000 654 } 655 }, 656 { 657 .width = 640, 658 .height = 480, 659 .vts = 860, 660 .data = ov7251_setting_vga_60fps, 661 .data_size = ARRAY_SIZE(ov7251_setting_vga_60fps), 662 .exposure_max = 840, 663 .exposure_def = 504, 664 .timeperframe = { 665 .numerator = 100, 666 .denominator = 6014 667 } 668 }, 669 { 670 .width = 640, 671 .height = 480, 672 .vts = 572, 673 .data = ov7251_setting_vga_90fps, 674 .data_size = ARRAY_SIZE(ov7251_setting_vga_90fps), 675 .exposure_max = 552, 676 .exposure_def = 504, 677 .timeperframe = { 678 .numerator = 100, 679 .denominator = 9043 680 } 681 }, 682 }; 683 684 static int ov7251_regulators_enable(struct ov7251 *ov7251) 685 { 686 int ret; 687 688 /* OV7251 power up sequence requires core regulator 689 * to be enabled not earlier than io regulator 690 */ 691 692 ret = regulator_enable(ov7251->io_regulator); 693 if (ret < 0) { 694 dev_err(ov7251->dev, "set io voltage failed\n"); 695 return ret; 696 } 697 698 ret = regulator_enable(ov7251->analog_regulator); 699 if (ret) { 700 dev_err(ov7251->dev, "set analog voltage failed\n"); 701 goto err_disable_io; 702 } 703 704 ret = regulator_enable(ov7251->core_regulator); 705 if (ret) { 706 dev_err(ov7251->dev, "set core voltage failed\n"); 707 goto err_disable_analog; 708 } 709 710 return 0; 711 712 err_disable_analog: 713 regulator_disable(ov7251->analog_regulator); 714 715 err_disable_io: 716 regulator_disable(ov7251->io_regulator); 717 718 return ret; 719 } 720 721 static void ov7251_regulators_disable(struct ov7251 *ov7251) 722 { 723 int ret; 724 725 ret = regulator_disable(ov7251->core_regulator); 726 if (ret < 0) 727 dev_err(ov7251->dev, "core regulator disable failed\n"); 728 729 ret = regulator_disable(ov7251->analog_regulator); 730 if (ret < 0) 731 dev_err(ov7251->dev, "analog regulator disable failed\n"); 732 733 ret = regulator_disable(ov7251->io_regulator); 734 if (ret < 0) 735 dev_err(ov7251->dev, "io regulator disable failed\n"); 736 } 737 738 static int ov7251_write_reg(struct ov7251 *ov7251, u16 reg, u8 val) 739 { 740 u8 regbuf[3]; 741 int ret; 742 743 regbuf[0] = reg >> 8; 744 regbuf[1] = reg & 0xff; 745 regbuf[2] = val; 746 747 ret = i2c_master_send(ov7251->i2c_client, regbuf, 3); 748 if (ret < 0) { 749 dev_err(ov7251->dev, "%s: write reg error %d: reg=%x, val=%x\n", 750 __func__, ret, reg, val); 751 return ret; 752 } 753 754 return 0; 755 } 756 757 static int ov7251_write_seq_regs(struct ov7251 *ov7251, u16 reg, u8 *val, 758 u8 num) 759 { 760 u8 regbuf[5]; 761 u8 nregbuf = sizeof(reg) + num * sizeof(*val); 762 int ret = 0; 763 764 if (nregbuf > sizeof(regbuf)) 765 return -EINVAL; 766 767 regbuf[0] = reg >> 8; 768 regbuf[1] = reg & 0xff; 769 770 memcpy(regbuf + 2, val, num); 771 772 ret = i2c_master_send(ov7251->i2c_client, regbuf, nregbuf); 773 if (ret < 0) { 774 dev_err(ov7251->dev, 775 "%s: write seq regs error %d: first reg=%x\n", 776 __func__, ret, reg); 777 return ret; 778 } 779 780 return 0; 781 } 782 783 static int ov7251_read_reg(struct ov7251 *ov7251, u16 reg, u8 *val) 784 { 785 u8 regbuf[2]; 786 int ret; 787 788 regbuf[0] = reg >> 8; 789 regbuf[1] = reg & 0xff; 790 791 ret = i2c_master_send(ov7251->i2c_client, regbuf, 2); 792 if (ret < 0) { 793 dev_err(ov7251->dev, "%s: write reg error %d: reg=%x\n", 794 __func__, ret, reg); 795 return ret; 796 } 797 798 ret = i2c_master_recv(ov7251->i2c_client, val, 1); 799 if (ret < 0) { 800 dev_err(ov7251->dev, "%s: read reg error %d: reg=%x\n", 801 __func__, ret, reg); 802 return ret; 803 } 804 805 return 0; 806 } 807 808 static int ov7251_pll_configure(struct ov7251 *ov7251) 809 { 810 const struct ov7251_pll_cfgs *configs; 811 int ret; 812 813 configs = ov7251->pll_cfgs; 814 815 ret = ov7251_write_reg(ov7251, OV7251_PLL1_PRE_DIV_REG, 816 configs->pll1[ov7251->link_freq_idx]->pre_div); 817 if (ret < 0) 818 return ret; 819 820 ret = ov7251_write_reg(ov7251, OV7251_PLL1_MULT_REG, 821 configs->pll1[ov7251->link_freq_idx]->mult); 822 if (ret < 0) 823 return ret; 824 ret = ov7251_write_reg(ov7251, OV7251_PLL1_DIVIDER_REG, 825 configs->pll1[ov7251->link_freq_idx]->div); 826 if (ret < 0) 827 return ret; 828 829 ret = ov7251_write_reg(ov7251, OV7251_PLL1_PIX_DIV_REG, 830 configs->pll1[ov7251->link_freq_idx]->pix_div); 831 if (ret < 0) 832 return ret; 833 834 ret = ov7251_write_reg(ov7251, OV7251_PLL1_MIPI_DIV_REG, 835 configs->pll1[ov7251->link_freq_idx]->mipi_div); 836 if (ret < 0) 837 return ret; 838 839 ret = ov7251_write_reg(ov7251, OV7251_PLL2_PRE_DIV_REG, 840 configs->pll2->pre_div); 841 if (ret < 0) 842 return ret; 843 844 ret = ov7251_write_reg(ov7251, OV7251_PLL2_MULT_REG, 845 configs->pll2->mult); 846 if (ret < 0) 847 return ret; 848 849 ret = ov7251_write_reg(ov7251, OV7251_PLL2_DIVIDER_REG, 850 configs->pll2->div); 851 if (ret < 0) 852 return ret; 853 854 ret = ov7251_write_reg(ov7251, OV7251_PLL2_SYS_DIV_REG, 855 configs->pll2->sys_div); 856 if (ret < 0) 857 return ret; 858 859 ret = ov7251_write_reg(ov7251, OV7251_PLL2_ADC_DIV_REG, 860 configs->pll2->adc_div); 861 862 return ret; 863 } 864 865 static int ov7251_set_exposure(struct ov7251 *ov7251, s32 exposure) 866 { 867 u16 reg; 868 u8 val[3]; 869 870 reg = OV7251_AEC_EXPO_0; 871 val[0] = (exposure & 0xf000) >> 12; /* goes to OV7251_AEC_EXPO_0 */ 872 val[1] = (exposure & 0x0ff0) >> 4; /* goes to OV7251_AEC_EXPO_1 */ 873 val[2] = (exposure & 0x000f) << 4; /* goes to OV7251_AEC_EXPO_2 */ 874 875 return ov7251_write_seq_regs(ov7251, reg, val, 3); 876 } 877 878 static int ov7251_set_gain(struct ov7251 *ov7251, s32 gain) 879 { 880 u16 reg; 881 u8 val[2]; 882 883 reg = OV7251_AEC_AGC_ADJ_0; 884 val[0] = (gain & 0x0300) >> 8; /* goes to OV7251_AEC_AGC_ADJ_0 */ 885 val[1] = gain & 0xff; /* goes to OV7251_AEC_AGC_ADJ_1 */ 886 887 return ov7251_write_seq_regs(ov7251, reg, val, 2); 888 } 889 890 static int ov7251_set_register_array(struct ov7251 *ov7251, 891 const struct reg_value *settings, 892 unsigned int num_settings) 893 { 894 unsigned int i; 895 int ret; 896 897 for (i = 0; i < num_settings; ++i, ++settings) { 898 ret = ov7251_write_reg(ov7251, settings->reg, settings->val); 899 if (ret < 0) 900 return ret; 901 } 902 903 return 0; 904 } 905 906 static int ov7251_set_power_on(struct device *dev) 907 { 908 struct i2c_client *client = container_of(dev, struct i2c_client, dev); 909 struct v4l2_subdev *sd = i2c_get_clientdata(client); 910 struct ov7251 *ov7251 = to_ov7251(sd); 911 int ret; 912 u32 wait_us; 913 914 ret = ov7251_regulators_enable(ov7251); 915 if (ret < 0) 916 return ret; 917 918 ret = clk_prepare_enable(ov7251->xclk); 919 if (ret < 0) { 920 dev_err(ov7251->dev, "clk prepare enable failed\n"); 921 ov7251_regulators_disable(ov7251); 922 return ret; 923 } 924 925 gpiod_set_value_cansleep(ov7251->enable_gpio, 1); 926 927 /* wait at least 65536 external clock cycles */ 928 wait_us = DIV_ROUND_UP(65536 * 1000, 929 DIV_ROUND_UP(ov7251->xclk_freq, 1000)); 930 usleep_range(wait_us, wait_us + 1000); 931 932 ret = ov7251_set_register_array(ov7251, 933 ov7251_global_init_setting, 934 ARRAY_SIZE(ov7251_global_init_setting)); 935 if (ret < 0) { 936 dev_err(ov7251->dev, "error during global init\n"); 937 gpiod_set_value_cansleep(ov7251->enable_gpio, 0); 938 clk_disable_unprepare(ov7251->xclk); 939 ov7251_regulators_disable(ov7251); 940 return ret; 941 } 942 943 return ret; 944 } 945 946 static int ov7251_set_power_off(struct device *dev) 947 { 948 struct i2c_client *client = container_of(dev, struct i2c_client, dev); 949 struct v4l2_subdev *sd = i2c_get_clientdata(client); 950 struct ov7251 *ov7251 = to_ov7251(sd); 951 952 clk_disable_unprepare(ov7251->xclk); 953 gpiod_set_value_cansleep(ov7251->enable_gpio, 0); 954 ov7251_regulators_disable(ov7251); 955 956 return 0; 957 } 958 959 static int ov7251_set_hflip(struct ov7251 *ov7251, s32 value) 960 { 961 u8 val = ov7251->timing_format2; 962 int ret; 963 964 if (value) 965 val |= OV7251_TIMING_FORMAT2_MIRROR; 966 else 967 val &= ~OV7251_TIMING_FORMAT2_MIRROR; 968 969 ret = ov7251_write_reg(ov7251, OV7251_TIMING_FORMAT2, val); 970 if (!ret) 971 ov7251->timing_format2 = val; 972 973 return ret; 974 } 975 976 static int ov7251_set_vflip(struct ov7251 *ov7251, s32 value) 977 { 978 u8 val = ov7251->timing_format1; 979 int ret; 980 981 if (value) 982 val |= OV7251_TIMING_FORMAT1_VFLIP; 983 else 984 val &= ~OV7251_TIMING_FORMAT1_VFLIP; 985 986 ret = ov7251_write_reg(ov7251, OV7251_TIMING_FORMAT1, val); 987 if (!ret) 988 ov7251->timing_format1 = val; 989 990 return ret; 991 } 992 993 static int ov7251_set_test_pattern(struct ov7251 *ov7251, s32 value) 994 { 995 u8 val = ov7251->pre_isp_00; 996 int ret; 997 998 if (value) 999 val |= OV7251_PRE_ISP_00_TEST_PATTERN; 1000 else 1001 val &= ~OV7251_PRE_ISP_00_TEST_PATTERN; 1002 1003 ret = ov7251_write_reg(ov7251, OV7251_PRE_ISP_00, val); 1004 if (!ret) 1005 ov7251->pre_isp_00 = val; 1006 1007 return ret; 1008 } 1009 1010 static const char * const ov7251_test_pattern_menu[] = { 1011 "Disabled", 1012 "Vertical Pattern Bars", 1013 }; 1014 1015 static int ov7251_vts_configure(struct ov7251 *ov7251, s32 vblank) 1016 { 1017 u8 vts[2]; 1018 1019 vts[0] = ((ov7251->current_mode->height + vblank) & 0xff00) >> 8; 1020 vts[1] = ((ov7251->current_mode->height + vblank) & 0x00ff); 1021 1022 return ov7251_write_seq_regs(ov7251, OV7251_TIMING_VTS_REG, vts, 2); 1023 } 1024 1025 static int ov7251_s_ctrl(struct v4l2_ctrl *ctrl) 1026 { 1027 struct ov7251 *ov7251 = container_of(ctrl->handler, 1028 struct ov7251, ctrls); 1029 int ret; 1030 1031 /* If VBLANK is altered we need to update exposure to compensate */ 1032 if (ctrl->id == V4L2_CID_VBLANK) { 1033 int exposure_max; 1034 1035 exposure_max = ov7251->current_mode->height + ctrl->val - 1036 OV7251_INTEGRATION_MARGIN; 1037 __v4l2_ctrl_modify_range(ov7251->exposure, 1038 ov7251->exposure->minimum, 1039 exposure_max, 1040 ov7251->exposure->step, 1041 min(ov7251->exposure->val, 1042 exposure_max)); 1043 } 1044 1045 /* v4l2_ctrl_lock() locks our mutex */ 1046 1047 if (!pm_runtime_get_if_in_use(ov7251->dev)) 1048 return 0; 1049 1050 switch (ctrl->id) { 1051 case V4L2_CID_EXPOSURE: 1052 ret = ov7251_set_exposure(ov7251, ctrl->val); 1053 break; 1054 case V4L2_CID_GAIN: 1055 ret = ov7251_set_gain(ov7251, ctrl->val); 1056 break; 1057 case V4L2_CID_TEST_PATTERN: 1058 ret = ov7251_set_test_pattern(ov7251, ctrl->val); 1059 break; 1060 case V4L2_CID_HFLIP: 1061 ret = ov7251_set_hflip(ov7251, ctrl->val); 1062 break; 1063 case V4L2_CID_VFLIP: 1064 ret = ov7251_set_vflip(ov7251, ctrl->val); 1065 break; 1066 case V4L2_CID_VBLANK: 1067 ret = ov7251_vts_configure(ov7251, ctrl->val); 1068 break; 1069 default: 1070 ret = -EINVAL; 1071 break; 1072 } 1073 1074 pm_runtime_put(ov7251->dev); 1075 1076 return ret; 1077 } 1078 1079 static const struct v4l2_ctrl_ops ov7251_ctrl_ops = { 1080 .s_ctrl = ov7251_s_ctrl, 1081 }; 1082 1083 static int ov7251_enum_mbus_code(struct v4l2_subdev *sd, 1084 struct v4l2_subdev_state *sd_state, 1085 struct v4l2_subdev_mbus_code_enum *code) 1086 { 1087 if (code->index > 0) 1088 return -EINVAL; 1089 1090 code->code = MEDIA_BUS_FMT_Y10_1X10; 1091 1092 return 0; 1093 } 1094 1095 static int ov7251_enum_frame_size(struct v4l2_subdev *subdev, 1096 struct v4l2_subdev_state *sd_state, 1097 struct v4l2_subdev_frame_size_enum *fse) 1098 { 1099 if (fse->code != MEDIA_BUS_FMT_Y10_1X10) 1100 return -EINVAL; 1101 1102 if (fse->index >= ARRAY_SIZE(ov7251_mode_info_data)) 1103 return -EINVAL; 1104 1105 fse->min_width = ov7251_mode_info_data[fse->index].width; 1106 fse->max_width = ov7251_mode_info_data[fse->index].width; 1107 fse->min_height = ov7251_mode_info_data[fse->index].height; 1108 fse->max_height = ov7251_mode_info_data[fse->index].height; 1109 1110 return 0; 1111 } 1112 1113 static int ov7251_enum_frame_ival(struct v4l2_subdev *subdev, 1114 struct v4l2_subdev_state *sd_state, 1115 struct v4l2_subdev_frame_interval_enum *fie) 1116 { 1117 unsigned int index = fie->index; 1118 unsigned int i; 1119 1120 for (i = 0; i < ARRAY_SIZE(ov7251_mode_info_data); i++) { 1121 if (fie->width != ov7251_mode_info_data[i].width || 1122 fie->height != ov7251_mode_info_data[i].height) 1123 continue; 1124 1125 if (index-- == 0) { 1126 fie->interval = ov7251_mode_info_data[i].timeperframe; 1127 return 0; 1128 } 1129 } 1130 1131 return -EINVAL; 1132 } 1133 1134 static struct v4l2_mbus_framefmt * 1135 __ov7251_get_pad_format(struct ov7251 *ov7251, 1136 struct v4l2_subdev_state *sd_state, 1137 unsigned int pad, 1138 enum v4l2_subdev_format_whence which) 1139 { 1140 switch (which) { 1141 case V4L2_SUBDEV_FORMAT_TRY: 1142 return v4l2_subdev_state_get_format(sd_state, pad); 1143 case V4L2_SUBDEV_FORMAT_ACTIVE: 1144 return &ov7251->fmt; 1145 default: 1146 return NULL; 1147 } 1148 } 1149 1150 static int ov7251_get_format(struct v4l2_subdev *sd, 1151 struct v4l2_subdev_state *sd_state, 1152 struct v4l2_subdev_format *format) 1153 { 1154 struct ov7251 *ov7251 = to_ov7251(sd); 1155 1156 mutex_lock(&ov7251->lock); 1157 format->format = *__ov7251_get_pad_format(ov7251, sd_state, 1158 format->pad, 1159 format->which); 1160 mutex_unlock(&ov7251->lock); 1161 1162 return 0; 1163 } 1164 1165 static struct v4l2_rect * 1166 __ov7251_get_pad_crop(struct ov7251 *ov7251, 1167 struct v4l2_subdev_state *sd_state, 1168 unsigned int pad, enum v4l2_subdev_format_whence which) 1169 { 1170 switch (which) { 1171 case V4L2_SUBDEV_FORMAT_TRY: 1172 return v4l2_subdev_state_get_crop(sd_state, pad); 1173 case V4L2_SUBDEV_FORMAT_ACTIVE: 1174 return &ov7251->crop; 1175 default: 1176 return NULL; 1177 } 1178 } 1179 1180 static inline u32 avg_fps(const struct v4l2_fract *t) 1181 { 1182 return (t->denominator + (t->numerator >> 1)) / t->numerator; 1183 } 1184 1185 static const struct ov7251_mode_info * 1186 ov7251_find_mode_by_ival(struct ov7251 *ov7251, struct v4l2_fract *timeperframe) 1187 { 1188 const struct ov7251_mode_info *mode = ov7251->current_mode; 1189 unsigned int fps_req = avg_fps(timeperframe); 1190 unsigned int max_dist_match = (unsigned int) -1; 1191 unsigned int i, n = 0; 1192 1193 for (i = 0; i < ARRAY_SIZE(ov7251_mode_info_data); i++) { 1194 unsigned int dist; 1195 unsigned int fps_tmp; 1196 1197 if (mode->width != ov7251_mode_info_data[i].width || 1198 mode->height != ov7251_mode_info_data[i].height) 1199 continue; 1200 1201 fps_tmp = avg_fps(&ov7251_mode_info_data[i].timeperframe); 1202 1203 dist = abs(fps_req - fps_tmp); 1204 1205 if (dist < max_dist_match) { 1206 n = i; 1207 max_dist_match = dist; 1208 } 1209 } 1210 1211 return &ov7251_mode_info_data[n]; 1212 } 1213 1214 static int ov7251_set_format(struct v4l2_subdev *sd, 1215 struct v4l2_subdev_state *sd_state, 1216 struct v4l2_subdev_format *format) 1217 { 1218 struct ov7251 *ov7251 = to_ov7251(sd); 1219 struct v4l2_mbus_framefmt *__format; 1220 int vblank_max, vblank_def; 1221 struct v4l2_rect *__crop; 1222 const struct ov7251_mode_info *new_mode; 1223 int ret = 0; 1224 1225 mutex_lock(&ov7251->lock); 1226 1227 __crop = __ov7251_get_pad_crop(ov7251, sd_state, format->pad, 1228 format->which); 1229 1230 new_mode = v4l2_find_nearest_size(ov7251_mode_info_data, 1231 ARRAY_SIZE(ov7251_mode_info_data), 1232 width, height, 1233 format->format.width, format->format.height); 1234 1235 __crop->width = new_mode->width; 1236 __crop->height = new_mode->height; 1237 1238 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 1239 ret = __v4l2_ctrl_modify_range(ov7251->exposure, 1240 1, new_mode->exposure_max, 1241 1, new_mode->exposure_def); 1242 if (ret < 0) 1243 goto exit; 1244 1245 ret = __v4l2_ctrl_s_ctrl(ov7251->exposure, 1246 new_mode->exposure_def); 1247 if (ret < 0) 1248 goto exit; 1249 1250 ret = __v4l2_ctrl_s_ctrl(ov7251->gain, 16); 1251 if (ret < 0) 1252 goto exit; 1253 1254 vblank_max = OV7251_TIMING_MAX_VTS - new_mode->height; 1255 vblank_def = new_mode->vts - new_mode->height; 1256 ret = __v4l2_ctrl_modify_range(ov7251->vblank, 1257 OV7251_TIMING_MIN_VTS, 1258 vblank_max, 1, vblank_def); 1259 if (ret < 0) 1260 goto exit; 1261 1262 ov7251->current_mode = new_mode; 1263 } 1264 1265 __format = __ov7251_get_pad_format(ov7251, sd_state, format->pad, 1266 format->which); 1267 __format->width = __crop->width; 1268 __format->height = __crop->height; 1269 __format->code = MEDIA_BUS_FMT_Y10_1X10; 1270 __format->field = V4L2_FIELD_NONE; 1271 __format->colorspace = V4L2_COLORSPACE_SRGB; 1272 __format->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(__format->colorspace); 1273 __format->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, 1274 __format->colorspace, __format->ycbcr_enc); 1275 __format->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(__format->colorspace); 1276 1277 format->format = *__format; 1278 1279 exit: 1280 mutex_unlock(&ov7251->lock); 1281 1282 return ret; 1283 } 1284 1285 static int ov7251_init_state(struct v4l2_subdev *subdev, 1286 struct v4l2_subdev_state *sd_state) 1287 { 1288 struct v4l2_subdev_format fmt = { 1289 .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY 1290 : V4L2_SUBDEV_FORMAT_ACTIVE, 1291 .format = { 1292 .width = 640, 1293 .height = 480 1294 } 1295 }; 1296 1297 ov7251_set_format(subdev, sd_state, &fmt); 1298 1299 return 0; 1300 } 1301 1302 static int ov7251_get_selection(struct v4l2_subdev *sd, 1303 struct v4l2_subdev_state *sd_state, 1304 struct v4l2_subdev_selection *sel) 1305 { 1306 struct ov7251 *ov7251 = to_ov7251(sd); 1307 1308 switch (sel->target) { 1309 case V4L2_SEL_TGT_CROP_DEFAULT: 1310 case V4L2_SEL_TGT_CROP: 1311 mutex_lock(&ov7251->lock); 1312 sel->r = *__ov7251_get_pad_crop(ov7251, sd_state, sel->pad, 1313 sel->which); 1314 mutex_unlock(&ov7251->lock); 1315 break; 1316 case V4L2_SEL_TGT_NATIVE_SIZE: 1317 sel->r.top = 0; 1318 sel->r.left = 0; 1319 sel->r.width = OV7251_NATIVE_WIDTH; 1320 sel->r.height = OV7251_NATIVE_HEIGHT; 1321 break; 1322 case V4L2_SEL_TGT_CROP_BOUNDS: 1323 sel->r.top = OV7251_ACTIVE_START_TOP; 1324 sel->r.left = OV7251_ACTIVE_START_LEFT; 1325 sel->r.width = OV7251_ACTIVE_WIDTH; 1326 sel->r.height = OV7251_ACTIVE_HEIGHT; 1327 break; 1328 default: 1329 return -EINVAL; 1330 } 1331 1332 return 0; 1333 } 1334 1335 static int ov7251_s_stream(struct v4l2_subdev *subdev, int enable) 1336 { 1337 struct ov7251 *ov7251 = to_ov7251(subdev); 1338 int ret; 1339 1340 mutex_lock(&ov7251->lock); 1341 1342 if (enable) { 1343 ret = pm_runtime_resume_and_get(ov7251->dev); 1344 if (ret) { 1345 mutex_unlock(&ov7251->lock); 1346 return ret; 1347 } 1348 1349 ret = ov7251_pll_configure(ov7251); 1350 if (ret) { 1351 dev_err(ov7251->dev, "error configuring PLLs\n"); 1352 goto err_power_down; 1353 } 1354 1355 ret = ov7251_set_register_array(ov7251, 1356 ov7251->current_mode->data, 1357 ov7251->current_mode->data_size); 1358 if (ret < 0) { 1359 dev_err(ov7251->dev, "could not set mode %dx%d\n", 1360 ov7251->current_mode->width, 1361 ov7251->current_mode->height); 1362 goto err_power_down; 1363 } 1364 ret = __v4l2_ctrl_handler_setup(&ov7251->ctrls); 1365 if (ret < 0) { 1366 dev_err(ov7251->dev, "could not sync v4l2 controls\n"); 1367 goto err_power_down; 1368 } 1369 ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT, 1370 OV7251_SC_MODE_SELECT_STREAMING); 1371 if (ret) 1372 goto err_power_down; 1373 } else { 1374 ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT, 1375 OV7251_SC_MODE_SELECT_SW_STANDBY); 1376 pm_runtime_put(ov7251->dev); 1377 } 1378 1379 mutex_unlock(&ov7251->lock); 1380 return ret; 1381 1382 err_power_down: 1383 pm_runtime_put(ov7251->dev); 1384 mutex_unlock(&ov7251->lock); 1385 return ret; 1386 } 1387 1388 static int ov7251_get_frame_interval(struct v4l2_subdev *subdev, 1389 struct v4l2_subdev_state *sd_state, 1390 struct v4l2_subdev_frame_interval *fi) 1391 { 1392 struct ov7251 *ov7251 = to_ov7251(subdev); 1393 1394 /* 1395 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1396 * subdev active state API. 1397 */ 1398 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1399 return -EINVAL; 1400 1401 mutex_lock(&ov7251->lock); 1402 fi->interval = ov7251->current_mode->timeperframe; 1403 mutex_unlock(&ov7251->lock); 1404 1405 return 0; 1406 } 1407 1408 static int ov7251_set_frame_interval(struct v4l2_subdev *subdev, 1409 struct v4l2_subdev_state *sd_state, 1410 struct v4l2_subdev_frame_interval *fi) 1411 { 1412 struct ov7251 *ov7251 = to_ov7251(subdev); 1413 const struct ov7251_mode_info *new_mode; 1414 int ret = 0; 1415 1416 /* 1417 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1418 * subdev active state API. 1419 */ 1420 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1421 return -EINVAL; 1422 1423 mutex_lock(&ov7251->lock); 1424 new_mode = ov7251_find_mode_by_ival(ov7251, &fi->interval); 1425 1426 if (new_mode != ov7251->current_mode) { 1427 ret = __v4l2_ctrl_modify_range(ov7251->exposure, 1428 1, new_mode->exposure_max, 1429 1, new_mode->exposure_def); 1430 if (ret < 0) 1431 goto exit; 1432 1433 ret = __v4l2_ctrl_s_ctrl(ov7251->exposure, 1434 new_mode->exposure_def); 1435 if (ret < 0) 1436 goto exit; 1437 1438 ret = __v4l2_ctrl_s_ctrl(ov7251->gain, 16); 1439 if (ret < 0) 1440 goto exit; 1441 1442 ov7251->current_mode = new_mode; 1443 } 1444 1445 fi->interval = ov7251->current_mode->timeperframe; 1446 1447 exit: 1448 mutex_unlock(&ov7251->lock); 1449 1450 return ret; 1451 } 1452 1453 static const struct v4l2_subdev_video_ops ov7251_video_ops = { 1454 .s_stream = ov7251_s_stream, 1455 }; 1456 1457 static const struct v4l2_subdev_pad_ops ov7251_subdev_pad_ops = { 1458 .enum_mbus_code = ov7251_enum_mbus_code, 1459 .enum_frame_size = ov7251_enum_frame_size, 1460 .enum_frame_interval = ov7251_enum_frame_ival, 1461 .get_fmt = ov7251_get_format, 1462 .set_fmt = ov7251_set_format, 1463 .get_selection = ov7251_get_selection, 1464 .get_frame_interval = ov7251_get_frame_interval, 1465 .set_frame_interval = ov7251_set_frame_interval, 1466 }; 1467 1468 static const struct v4l2_subdev_ops ov7251_subdev_ops = { 1469 .video = &ov7251_video_ops, 1470 .pad = &ov7251_subdev_pad_ops, 1471 }; 1472 1473 static const struct v4l2_subdev_internal_ops ov7251_internal_ops = { 1474 .init_state = ov7251_init_state, 1475 }; 1476 1477 static int ov7251_check_hwcfg(struct ov7251 *ov7251) 1478 { 1479 struct fwnode_handle *fwnode = dev_fwnode(ov7251->dev); 1480 struct v4l2_fwnode_endpoint bus_cfg = { 1481 .bus_type = V4L2_MBUS_CSI2_DPHY, 1482 }; 1483 struct fwnode_handle *endpoint; 1484 unsigned int i, j; 1485 int ret; 1486 1487 endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); 1488 if (!endpoint) 1489 return -EPROBE_DEFER; /* could be provided by cio2-bridge */ 1490 1491 ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &bus_cfg); 1492 fwnode_handle_put(endpoint); 1493 if (ret) 1494 return dev_err_probe(ov7251->dev, ret, 1495 "parsing endpoint node failed\n"); 1496 1497 if (!bus_cfg.nr_of_link_frequencies) { 1498 ret = dev_err_probe(ov7251->dev, -EINVAL, 1499 "no link frequencies defined\n"); 1500 goto out_free_bus_cfg; 1501 } 1502 1503 for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) { 1504 for (j = 0; j < ARRAY_SIZE(link_freq); j++) 1505 if (bus_cfg.link_frequencies[i] == link_freq[j]) 1506 break; 1507 1508 if (j < ARRAY_SIZE(link_freq)) 1509 break; 1510 } 1511 1512 if (i == bus_cfg.nr_of_link_frequencies) { 1513 ret = dev_err_probe(ov7251->dev, -EINVAL, 1514 "no supported link freq found\n"); 1515 goto out_free_bus_cfg; 1516 } 1517 1518 ov7251->link_freq_idx = i; 1519 1520 out_free_bus_cfg: 1521 v4l2_fwnode_endpoint_free(&bus_cfg); 1522 1523 return ret; 1524 } 1525 1526 static int ov7251_detect_chip(struct ov7251 *ov7251) 1527 { 1528 u8 chip_id_high, chip_id_low, chip_rev; 1529 int ret; 1530 1531 ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_HIGH, &chip_id_high); 1532 if (ret < 0 || chip_id_high != OV7251_CHIP_ID_HIGH_BYTE) 1533 return dev_err_probe(ov7251->dev, -ENODEV, 1534 "could not read ID high\n"); 1535 1536 ret = ov7251_read_reg(ov7251, OV7251_CHIP_ID_LOW, &chip_id_low); 1537 if (ret < 0 || chip_id_low != OV7251_CHIP_ID_LOW_BYTE) 1538 return dev_err_probe(ov7251->dev, -ENODEV, 1539 "could not read ID low\n"); 1540 1541 ret = ov7251_read_reg(ov7251, OV7251_SC_GP_IO_IN1, &chip_rev); 1542 if (ret < 0) 1543 return dev_err_probe(ov7251->dev, -ENODEV, 1544 "could not read revision\n"); 1545 chip_rev >>= 4; 1546 1547 dev_info(ov7251->dev, 1548 "OV7251 revision %x (%s) detected at address 0x%02x\n", 1549 chip_rev, 1550 chip_rev == 0x4 ? "1A / 1B" : 1551 chip_rev == 0x5 ? "1C / 1D" : 1552 chip_rev == 0x6 ? "1E" : 1553 chip_rev == 0x7 ? "1F" : "unknown", 1554 ov7251->i2c_client->addr); 1555 1556 return 0; 1557 } 1558 1559 static int ov7251_init_ctrls(struct ov7251 *ov7251) 1560 { 1561 int vblank_max, vblank_def; 1562 s64 pixel_rate; 1563 int hblank; 1564 1565 v4l2_ctrl_handler_init(&ov7251->ctrls, 7); 1566 ov7251->ctrls.lock = &ov7251->lock; 1567 1568 v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1569 V4L2_CID_HFLIP, 0, 1, 1, 0); 1570 v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1571 V4L2_CID_VFLIP, 0, 1, 1, 0); 1572 ov7251->exposure = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1573 V4L2_CID_EXPOSURE, 1, 32, 1, 32); 1574 ov7251->gain = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1575 V4L2_CID_GAIN, 16, 1023, 1, 16); 1576 v4l2_ctrl_new_std_menu_items(&ov7251->ctrls, &ov7251_ctrl_ops, 1577 V4L2_CID_TEST_PATTERN, 1578 ARRAY_SIZE(ov7251_test_pattern_menu) - 1, 1579 0, 0, ov7251_test_pattern_menu); 1580 1581 pixel_rate = pixel_rates[ov7251->link_freq_idx]; 1582 ov7251->pixel_clock = v4l2_ctrl_new_std(&ov7251->ctrls, 1583 &ov7251_ctrl_ops, 1584 V4L2_CID_PIXEL_RATE, 1585 pixel_rate, INT_MAX, 1586 pixel_rate, pixel_rate); 1587 ov7251->link_freq = v4l2_ctrl_new_int_menu(&ov7251->ctrls, 1588 &ov7251_ctrl_ops, 1589 V4L2_CID_LINK_FREQ, 1590 ARRAY_SIZE(link_freq) - 1, 1591 ov7251->link_freq_idx, 1592 link_freq); 1593 if (ov7251->link_freq) 1594 ov7251->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1595 if (ov7251->pixel_clock) 1596 ov7251->pixel_clock->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1597 1598 hblank = OV7251_FIXED_PPL - ov7251->current_mode->width; 1599 ov7251->hblank = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1600 V4L2_CID_HBLANK, hblank, hblank, 1, 1601 hblank); 1602 if (ov7251->hblank) 1603 ov7251->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY; 1604 1605 vblank_max = OV7251_TIMING_MAX_VTS - ov7251->current_mode->height; 1606 vblank_def = ov7251->current_mode->vts - ov7251->current_mode->height; 1607 ov7251->vblank = v4l2_ctrl_new_std(&ov7251->ctrls, &ov7251_ctrl_ops, 1608 V4L2_CID_VBLANK, 1609 OV7251_TIMING_MIN_VTS, vblank_max, 1, 1610 vblank_def); 1611 1612 ov7251->sd.ctrl_handler = &ov7251->ctrls; 1613 1614 if (ov7251->ctrls.error) { 1615 v4l2_ctrl_handler_free(&ov7251->ctrls); 1616 return ov7251->ctrls.error; 1617 } 1618 1619 return 0; 1620 } 1621 1622 static int ov7251_probe(struct i2c_client *client) 1623 { 1624 struct device *dev = &client->dev; 1625 struct ov7251 *ov7251; 1626 unsigned int rate = 0, clk_rate = 0; 1627 int ret; 1628 int i; 1629 1630 ov7251 = devm_kzalloc(dev, sizeof(struct ov7251), GFP_KERNEL); 1631 if (!ov7251) 1632 return -ENOMEM; 1633 1634 ov7251->i2c_client = client; 1635 ov7251->dev = dev; 1636 1637 ret = ov7251_check_hwcfg(ov7251); 1638 if (ret) 1639 return ret; 1640 1641 /* get system clock (xclk) */ 1642 ov7251->xclk = devm_clk_get_optional(dev, NULL); 1643 if (IS_ERR(ov7251->xclk)) 1644 return dev_err_probe(dev, PTR_ERR(ov7251->xclk), 1645 "could not get xclk"); 1646 1647 /* 1648 * We could have either a 24MHz or 19.2MHz clock rate from either DT or 1649 * ACPI. We also need to support the IPU3 case which will have both an 1650 * external clock AND a clock-frequency property. 1651 */ 1652 ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", 1653 &rate); 1654 if (ret && !ov7251->xclk) 1655 return dev_err_probe(dev, ret, "invalid clock config\n"); 1656 1657 clk_rate = clk_get_rate(ov7251->xclk); 1658 ov7251->xclk_freq = clk_rate ? clk_rate : rate; 1659 1660 if (ov7251->xclk_freq == 0) 1661 return dev_err_probe(dev, -EINVAL, "invalid clock frequency\n"); 1662 1663 if (!ret && ov7251->xclk) { 1664 ret = clk_set_rate(ov7251->xclk, rate); 1665 if (ret) 1666 return dev_err_probe(dev, ret, 1667 "failed to set clock rate\n"); 1668 } 1669 1670 for (i = 0; i < ARRAY_SIZE(supported_xclk_rates); i++) 1671 if (ov7251->xclk_freq == supported_xclk_rates[i]) 1672 break; 1673 1674 if (i == ARRAY_SIZE(supported_xclk_rates)) 1675 return dev_err_probe(dev, -EINVAL, 1676 "clock rate %u Hz is unsupported\n", 1677 ov7251->xclk_freq); 1678 1679 ov7251->pll_cfgs = ov7251_pll_cfgs[i]; 1680 1681 ov7251->io_regulator = devm_regulator_get(dev, "vdddo"); 1682 if (IS_ERR(ov7251->io_regulator)) { 1683 dev_err(dev, "cannot get io regulator\n"); 1684 return PTR_ERR(ov7251->io_regulator); 1685 } 1686 1687 ov7251->core_regulator = devm_regulator_get(dev, "vddd"); 1688 if (IS_ERR(ov7251->core_regulator)) { 1689 dev_err(dev, "cannot get core regulator\n"); 1690 return PTR_ERR(ov7251->core_regulator); 1691 } 1692 1693 ov7251->analog_regulator = devm_regulator_get(dev, "vdda"); 1694 if (IS_ERR(ov7251->analog_regulator)) { 1695 dev_err(dev, "cannot get analog regulator\n"); 1696 return PTR_ERR(ov7251->analog_regulator); 1697 } 1698 1699 ov7251->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH); 1700 if (IS_ERR(ov7251->enable_gpio)) { 1701 dev_err(dev, "cannot get enable gpio\n"); 1702 return PTR_ERR(ov7251->enable_gpio); 1703 } 1704 1705 mutex_init(&ov7251->lock); 1706 1707 ov7251->current_mode = &ov7251_mode_info_data[0]; 1708 ret = ov7251_init_ctrls(ov7251); 1709 if (ret) { 1710 dev_err_probe(dev, ret, "error during v4l2 ctrl init\n"); 1711 goto destroy_mutex; 1712 } 1713 1714 v4l2_i2c_subdev_init(&ov7251->sd, client, &ov7251_subdev_ops); 1715 ov7251->sd.internal_ops = &ov7251_internal_ops; 1716 ov7251->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 1717 ov7251->pad.flags = MEDIA_PAD_FL_SOURCE; 1718 ov7251->sd.dev = &client->dev; 1719 ov7251->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; 1720 1721 ret = media_entity_pads_init(&ov7251->sd.entity, 1, &ov7251->pad); 1722 if (ret < 0) { 1723 dev_err(dev, "could not register media entity\n"); 1724 goto free_ctrl; 1725 } 1726 1727 ret = ov7251_set_power_on(ov7251->dev); 1728 if (ret) 1729 goto free_entity; 1730 1731 ret = ov7251_detect_chip(ov7251); 1732 if (ret) 1733 goto power_down; 1734 1735 pm_runtime_set_active(&client->dev); 1736 pm_runtime_get_noresume(&client->dev); 1737 pm_runtime_enable(&client->dev); 1738 1739 ret = ov7251_read_reg(ov7251, OV7251_PRE_ISP_00, 1740 &ov7251->pre_isp_00); 1741 if (ret < 0) { 1742 dev_err(dev, "could not read test pattern value\n"); 1743 ret = -ENODEV; 1744 goto err_pm_runtime; 1745 } 1746 1747 ret = ov7251_read_reg(ov7251, OV7251_TIMING_FORMAT1, 1748 &ov7251->timing_format1); 1749 if (ret < 0) { 1750 dev_err(dev, "could not read vflip value\n"); 1751 ret = -ENODEV; 1752 goto err_pm_runtime; 1753 } 1754 1755 ret = ov7251_read_reg(ov7251, OV7251_TIMING_FORMAT2, 1756 &ov7251->timing_format2); 1757 if (ret < 0) { 1758 dev_err(dev, "could not read hflip value\n"); 1759 ret = -ENODEV; 1760 goto err_pm_runtime; 1761 } 1762 1763 pm_runtime_set_autosuspend_delay(&client->dev, 1000); 1764 pm_runtime_use_autosuspend(&client->dev); 1765 pm_runtime_put_autosuspend(&client->dev); 1766 1767 ret = v4l2_async_register_subdev(&ov7251->sd); 1768 if (ret < 0) { 1769 dev_err(dev, "could not register v4l2 device\n"); 1770 goto free_entity; 1771 } 1772 1773 ov7251_init_state(&ov7251->sd, NULL); 1774 1775 return 0; 1776 1777 err_pm_runtime: 1778 pm_runtime_disable(ov7251->dev); 1779 pm_runtime_put_noidle(ov7251->dev); 1780 power_down: 1781 ov7251_set_power_off(ov7251->dev); 1782 free_entity: 1783 media_entity_cleanup(&ov7251->sd.entity); 1784 free_ctrl: 1785 v4l2_ctrl_handler_free(&ov7251->ctrls); 1786 destroy_mutex: 1787 mutex_destroy(&ov7251->lock); 1788 1789 return ret; 1790 } 1791 1792 static void ov7251_remove(struct i2c_client *client) 1793 { 1794 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1795 struct ov7251 *ov7251 = to_ov7251(sd); 1796 1797 v4l2_async_unregister_subdev(&ov7251->sd); 1798 media_entity_cleanup(&ov7251->sd.entity); 1799 v4l2_ctrl_handler_free(&ov7251->ctrls); 1800 mutex_destroy(&ov7251->lock); 1801 1802 pm_runtime_disable(ov7251->dev); 1803 if (!pm_runtime_status_suspended(ov7251->dev)) 1804 ov7251_set_power_off(ov7251->dev); 1805 pm_runtime_set_suspended(ov7251->dev); 1806 } 1807 1808 static const struct dev_pm_ops ov7251_pm_ops = { 1809 SET_RUNTIME_PM_OPS(ov7251_set_power_off, ov7251_set_power_on, NULL) 1810 }; 1811 1812 static const struct of_device_id ov7251_of_match[] = { 1813 { .compatible = "ovti,ov7251" }, 1814 { /* sentinel */ } 1815 }; 1816 MODULE_DEVICE_TABLE(of, ov7251_of_match); 1817 1818 static const struct acpi_device_id ov7251_acpi_match[] = { 1819 { "INT347E" }, 1820 { } 1821 }; 1822 MODULE_DEVICE_TABLE(acpi, ov7251_acpi_match); 1823 1824 static struct i2c_driver ov7251_i2c_driver = { 1825 .driver = { 1826 .of_match_table = ov7251_of_match, 1827 .acpi_match_table = ov7251_acpi_match, 1828 .name = "ov7251", 1829 .pm = &ov7251_pm_ops, 1830 }, 1831 .probe = ov7251_probe, 1832 .remove = ov7251_remove, 1833 }; 1834 1835 module_i2c_driver(ov7251_i2c_driver); 1836 1837 MODULE_DESCRIPTION("Omnivision OV7251 Camera Driver"); 1838 MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>"); 1839 MODULE_LICENSE("GPL v2"); 1840