1 /* 2 * Omnivision OV9650/OV9652 CMOS Image Sensor driver 3 * 4 * Copyright (C) 2013, Sylwester Nawrocki <sylvester.nawrocki@gmail.com> 5 * 6 * Register definitions and initial settings based on a driver written 7 * by Vladimir Fonov. 8 * Copyright (c) 2010, Vladimir Fonov 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 #include <linux/clk.h> 15 #include <linux/delay.h> 16 #include <linux/gpio.h> 17 #include <linux/gpio/consumer.h> 18 #include <linux/i2c.h> 19 #include <linux/kernel.h> 20 #include <linux/media.h> 21 #include <linux/module.h> 22 #include <linux/ratelimit.h> 23 #include <linux/regmap.h> 24 #include <linux/slab.h> 25 #include <linux/string.h> 26 #include <linux/videodev2.h> 27 28 #include <media/media-entity.h> 29 #include <media/v4l2-async.h> 30 #include <media/v4l2-ctrls.h> 31 #include <media/v4l2-device.h> 32 #include <media/v4l2-event.h> 33 #include <media/v4l2-image-sizes.h> 34 #include <media/v4l2-subdev.h> 35 #include <media/v4l2-mediabus.h> 36 #include <media/i2c/ov9650.h> 37 38 static int debug; 39 module_param(debug, int, 0644); 40 MODULE_PARM_DESC(debug, "Debug level (0-2)"); 41 42 #define DRIVER_NAME "OV9650" 43 44 /* 45 * OV9650/OV9652 register definitions 46 */ 47 #define REG_GAIN 0x00 /* Gain control, AGC[7:0] */ 48 #define REG_BLUE 0x01 /* AWB - Blue chanel gain */ 49 #define REG_RED 0x02 /* AWB - Red chanel gain */ 50 #define REG_VREF 0x03 /* [7:6] - AGC[9:8], [5:3]/[2:0] */ 51 #define VREF_GAIN_MASK 0xc0 /* - VREF end/start low 3 bits */ 52 #define REG_COM1 0x04 53 #define COM1_CCIR656 0x40 54 #define REG_B_AVE 0x05 55 #define REG_GB_AVE 0x06 56 #define REG_GR_AVE 0x07 57 #define REG_R_AVE 0x08 58 #define REG_COM2 0x09 59 #define REG_PID 0x0a /* Product ID MSB */ 60 #define REG_VER 0x0b /* Product ID LSB */ 61 #define REG_COM3 0x0c 62 #define COM3_SWAP 0x40 63 #define COM3_VARIOPIXEL1 0x04 64 #define REG_COM4 0x0d /* Vario Pixels */ 65 #define COM4_VARIOPIXEL2 0x80 66 #define REG_COM5 0x0e /* System clock options */ 67 #define COM5_SLAVE_MODE 0x10 68 #define COM5_SYSTEMCLOCK48MHZ 0x80 69 #define REG_COM6 0x0f /* HREF & ADBLC options */ 70 #define REG_AECH 0x10 /* Exposure value, AEC[9:2] */ 71 #define REG_CLKRC 0x11 /* Clock control */ 72 #define CLK_EXT 0x40 /* Use external clock directly */ 73 #define CLK_SCALE 0x3f /* Mask for internal clock scale */ 74 #define REG_COM7 0x12 /* SCCB reset, output format */ 75 #define COM7_RESET 0x80 76 #define COM7_FMT_MASK 0x38 77 #define COM7_FMT_VGA 0x40 78 #define COM7_FMT_CIF 0x20 79 #define COM7_FMT_QVGA 0x10 80 #define COM7_FMT_QCIF 0x08 81 #define COM7_RGB 0x04 82 #define COM7_YUV 0x00 83 #define COM7_BAYER 0x01 84 #define COM7_PBAYER 0x05 85 #define REG_COM8 0x13 /* AGC/AEC options */ 86 #define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ 87 #define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ 88 #define COM8_BFILT 0x20 /* Band filter enable */ 89 #define COM8_AGC 0x04 /* Auto gain enable */ 90 #define COM8_AWB 0x02 /* White balance enable */ 91 #define COM8_AEC 0x01 /* Auto exposure enable */ 92 #define REG_COM9 0x14 /* Gain ceiling */ 93 #define COM9_GAIN_CEIL_MASK 0x70 /* */ 94 #define REG_COM10 0x15 /* PCLK, HREF, HSYNC signals polarity */ 95 #define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ 96 #define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ 97 #define COM10_HREF_REV 0x08 /* Reverse HREF */ 98 #define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ 99 #define COM10_VS_NEG 0x02 /* VSYNC negative */ 100 #define COM10_HS_NEG 0x01 /* HSYNC negative */ 101 #define REG_HSTART 0x17 /* Horiz start high bits */ 102 #define REG_HSTOP 0x18 /* Horiz stop high bits */ 103 #define REG_VSTART 0x19 /* Vert start high bits */ 104 #define REG_VSTOP 0x1a /* Vert stop high bits */ 105 #define REG_PSHFT 0x1b /* Pixel delay after HREF */ 106 #define REG_MIDH 0x1c /* Manufacturer ID MSB */ 107 #define REG_MIDL 0x1d /* Manufufacturer ID LSB */ 108 #define REG_MVFP 0x1e /* Image mirror/flip */ 109 #define MVFP_MIRROR 0x20 /* Mirror image */ 110 #define MVFP_FLIP 0x10 /* Vertical flip */ 111 #define REG_BOS 0x20 /* B channel Offset */ 112 #define REG_GBOS 0x21 /* Gb channel Offset */ 113 #define REG_GROS 0x22 /* Gr channel Offset */ 114 #define REG_ROS 0x23 /* R channel Offset */ 115 #define REG_AEW 0x24 /* AGC upper limit */ 116 #define REG_AEB 0x25 /* AGC lower limit */ 117 #define REG_VPT 0x26 /* AGC/AEC fast mode op region */ 118 #define REG_BBIAS 0x27 /* B channel output bias */ 119 #define REG_GBBIAS 0x28 /* Gb channel output bias */ 120 #define REG_GRCOM 0x29 /* Analog BLC & regulator */ 121 #define REG_EXHCH 0x2a /* Dummy pixel insert MSB */ 122 #define REG_EXHCL 0x2b /* Dummy pixel insert LSB */ 123 #define REG_RBIAS 0x2c /* R channel output bias */ 124 #define REG_ADVFL 0x2d /* LSB of dummy line insert */ 125 #define REG_ADVFH 0x2e /* MSB of dummy line insert */ 126 #define REG_YAVE 0x2f /* Y/G channel average value */ 127 #define REG_HSYST 0x30 /* HSYNC rising edge delay LSB*/ 128 #define REG_HSYEN 0x31 /* HSYNC falling edge delay LSB*/ 129 #define REG_HREF 0x32 /* HREF pieces */ 130 #define REG_CHLF 0x33 /* reserved */ 131 #define REG_ADC 0x37 /* reserved */ 132 #define REG_ACOM 0x38 /* reserved */ 133 #define REG_OFON 0x39 /* Power down register */ 134 #define OFON_PWRDN 0x08 /* Power down bit */ 135 #define REG_TSLB 0x3a /* YUVU format */ 136 #define TSLB_YUYV_MASK 0x0c /* UYVY or VYUY - see com13 */ 137 #define REG_COM11 0x3b /* Night mode, banding filter enable */ 138 #define COM11_NIGHT 0x80 /* Night mode enable */ 139 #define COM11_NMFR 0x60 /* Two bit NM frame rate */ 140 #define COM11_BANDING 0x01 /* Banding filter */ 141 #define COM11_AEC_REF_MASK 0x18 /* AEC reference area selection */ 142 #define REG_COM12 0x3c /* HREF option, UV average */ 143 #define COM12_HREF 0x80 /* HREF always */ 144 #define REG_COM13 0x3d /* Gamma selection, Color matrix en. */ 145 #define COM13_GAMMA 0x80 /* Gamma enable */ 146 #define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ 147 #define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ 148 #define REG_COM14 0x3e /* Edge enhancement options */ 149 #define COM14_EDGE_EN 0x02 150 #define COM14_EEF_X2 0x01 151 #define REG_EDGE 0x3f /* Edge enhancement factor */ 152 #define EDGE_FACTOR_MASK 0x0f 153 #define REG_COM15 0x40 /* Output range, RGB 555/565 */ 154 #define COM15_R10F0 0x00 /* Data range 10 to F0 */ 155 #define COM15_R01FE 0x80 /* 01 to FE */ 156 #define COM15_R00FF 0xc0 /* 00 to FF */ 157 #define COM15_RGB565 0x10 /* RGB565 output */ 158 #define COM15_RGB555 0x30 /* RGB555 output */ 159 #define COM15_SWAPRB 0x04 /* Swap R&B */ 160 #define REG_COM16 0x41 /* Color matrix coeff options */ 161 #define REG_COM17 0x42 /* Single frame out, banding filter */ 162 /* n = 1...9, 0x4f..0x57 */ 163 #define REG_MTX(__n) (0x4f + (__n) - 1) 164 #define REG_MTXS 0x58 165 /* Lens Correction Option 1...5, __n = 0...5 */ 166 #define REG_LCC(__n) (0x62 + (__n) - 1) 167 #define LCC5_LCC_ENABLE 0x01 /* LCC5, enable lens correction */ 168 #define LCC5_LCC_COLOR 0x04 169 #define REG_MANU 0x67 /* Manual U value */ 170 #define REG_MANV 0x68 /* Manual V value */ 171 #define REG_HV 0x69 /* Manual banding filter MSB */ 172 #define REG_MBD 0x6a /* Manual banding filter value */ 173 #define REG_DBLV 0x6b /* reserved */ 174 #define REG_GSP 0x6c /* Gamma curve */ 175 #define GSP_LEN 15 176 #define REG_GST 0x7c /* Gamma curve */ 177 #define GST_LEN 15 178 #define REG_COM21 0x8b 179 #define REG_COM22 0x8c /* Edge enhancement, denoising */ 180 #define COM22_WHTPCOR 0x02 /* White pixel correction enable */ 181 #define COM22_WHTPCOROPT 0x01 /* White pixel correction option */ 182 #define COM22_DENOISE 0x10 /* White pixel correction option */ 183 #define REG_COM23 0x8d /* Color bar test, color gain */ 184 #define COM23_TEST_MODE 0x10 185 #define REG_DBLC1 0x8f /* Digital BLC */ 186 #define REG_DBLC_B 0x90 /* Digital BLC B channel offset */ 187 #define REG_DBLC_R 0x91 /* Digital BLC R channel offset */ 188 #define REG_DM_LNL 0x92 /* Dummy line low 8 bits */ 189 #define REG_DM_LNH 0x93 /* Dummy line high 8 bits */ 190 #define REG_LCCFB 0x9d /* Lens Correction B channel */ 191 #define REG_LCCFR 0x9e /* Lens Correction R channel */ 192 #define REG_DBLC_GB 0x9f /* Digital BLC GB chan offset */ 193 #define REG_DBLC_GR 0xa0 /* Digital BLC GR chan offset */ 194 #define REG_AECHM 0xa1 /* Exposure value - bits AEC[15:10] */ 195 #define REG_BD50ST 0xa2 /* Banding filter value for 50Hz */ 196 #define REG_BD60ST 0xa3 /* Banding filter value for 60Hz */ 197 #define REG_NULL 0xff /* Array end token */ 198 199 #define DEF_CLKRC 0x80 200 201 #define OV965X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) 202 #define OV9650_ID 0x9650 203 #define OV9652_ID 0x9652 204 205 struct ov965x_ctrls { 206 struct v4l2_ctrl_handler handler; 207 struct { 208 struct v4l2_ctrl *auto_exp; 209 struct v4l2_ctrl *exposure; 210 }; 211 struct { 212 struct v4l2_ctrl *auto_wb; 213 struct v4l2_ctrl *blue_balance; 214 struct v4l2_ctrl *red_balance; 215 }; 216 struct { 217 struct v4l2_ctrl *hflip; 218 struct v4l2_ctrl *vflip; 219 }; 220 struct { 221 struct v4l2_ctrl *auto_gain; 222 struct v4l2_ctrl *gain; 223 }; 224 struct v4l2_ctrl *brightness; 225 struct v4l2_ctrl *saturation; 226 struct v4l2_ctrl *sharpness; 227 struct v4l2_ctrl *light_freq; 228 u8 update; 229 }; 230 231 struct ov965x_framesize { 232 u16 width; 233 u16 height; 234 u16 max_exp_lines; 235 const u8 *regs; 236 }; 237 238 struct ov965x_interval { 239 struct v4l2_fract interval; 240 /* Maximum resolution for this interval */ 241 struct v4l2_frmsize_discrete size; 242 u8 clkrc_div; 243 }; 244 245 enum gpio_id { 246 GPIO_PWDN, 247 GPIO_RST, 248 NUM_GPIOS, 249 }; 250 251 struct ov965x { 252 struct v4l2_subdev sd; 253 struct media_pad pad; 254 enum v4l2_mbus_type bus_type; 255 struct gpio_desc *gpios[NUM_GPIOS]; 256 /* External master clock frequency */ 257 unsigned long mclk_frequency; 258 struct clk *clk; 259 260 /* Protects the struct fields below */ 261 struct mutex lock; 262 263 struct regmap *regmap; 264 265 /* Exposure row interval in us */ 266 unsigned int exp_row_interval; 267 268 unsigned short id; 269 const struct ov965x_framesize *frame_size; 270 /* YUYV sequence (pixel format) control register */ 271 u8 tslb_reg; 272 struct v4l2_mbus_framefmt format; 273 274 struct ov965x_ctrls ctrls; 275 /* Pointer to frame rate control data structure */ 276 const struct ov965x_interval *fiv; 277 278 int streaming; 279 int power; 280 281 u8 apply_frame_fmt; 282 }; 283 284 struct i2c_rv { 285 u8 addr; 286 u8 value; 287 }; 288 289 static const struct i2c_rv ov965x_init_regs[] = { 290 { REG_COM2, 0x10 }, /* Set soft sleep mode */ 291 { REG_COM5, 0x00 }, /* System clock options */ 292 { REG_COM2, 0x01 }, /* Output drive, soft sleep mode */ 293 { REG_COM10, 0x00 }, /* Slave mode, HREF vs HSYNC, signals negate */ 294 { REG_EDGE, 0xa6 }, /* Edge enhancement treshhold and factor */ 295 { REG_COM16, 0x02 }, /* Color matrix coeff double option */ 296 { REG_COM17, 0x08 }, /* Single frame out, banding filter */ 297 { 0x16, 0x06 }, 298 { REG_CHLF, 0xc0 }, /* Reserved */ 299 { 0x34, 0xbf }, 300 { 0xa8, 0x80 }, 301 { 0x96, 0x04 }, 302 { 0x8e, 0x00 }, 303 { REG_COM12, 0x77 }, /* HREF option, UV average */ 304 { 0x8b, 0x06 }, 305 { 0x35, 0x91 }, 306 { 0x94, 0x88 }, 307 { 0x95, 0x88 }, 308 { REG_COM15, 0xc1 }, /* Output range, RGB 555/565 */ 309 { REG_GRCOM, 0x2f }, /* Analog BLC & regulator */ 310 { REG_COM6, 0x43 }, /* HREF & ADBLC options */ 311 { REG_COM8, 0xe5 }, /* AGC/AEC options */ 312 { REG_COM13, 0x90 }, /* Gamma selection, colour matrix, UV delay */ 313 { REG_HV, 0x80 }, /* Manual banding filter MSB */ 314 { 0x5c, 0x96 }, /* Reserved up to 0xa5 */ 315 { 0x5d, 0x96 }, 316 { 0x5e, 0x10 }, 317 { 0x59, 0xeb }, 318 { 0x5a, 0x9c }, 319 { 0x5b, 0x55 }, 320 { 0x43, 0xf0 }, 321 { 0x44, 0x10 }, 322 { 0x45, 0x55 }, 323 { 0x46, 0x86 }, 324 { 0x47, 0x64 }, 325 { 0x48, 0x86 }, 326 { 0x5f, 0xe0 }, 327 { 0x60, 0x8c }, 328 { 0x61, 0x20 }, 329 { 0xa5, 0xd9 }, 330 { 0xa4, 0x74 }, /* reserved */ 331 { REG_COM23, 0x02 }, /* Color gain analog/_digital_ */ 332 { REG_COM8, 0xe7 }, /* Enable AEC, AWB, AEC */ 333 { REG_COM22, 0x23 }, /* Edge enhancement, denoising */ 334 { 0xa9, 0xb8 }, 335 { 0xaa, 0x92 }, 336 { 0xab, 0x0a }, 337 { REG_DBLC1, 0xdf }, /* Digital BLC */ 338 { REG_DBLC_B, 0x00 }, /* Digital BLC B chan offset */ 339 { REG_DBLC_R, 0x00 }, /* Digital BLC R chan offset */ 340 { REG_DBLC_GB, 0x00 }, /* Digital BLC GB chan offset */ 341 { REG_DBLC_GR, 0x00 }, 342 { REG_COM9, 0x3a }, /* Gain ceiling 16x */ 343 { REG_NULL, 0 } 344 }; 345 346 #define NUM_FMT_REGS 14 347 /* 348 * COM7, COM3, COM4, HSTART, HSTOP, HREF, VSTART, VSTOP, VREF, 349 * EXHCH, EXHCL, ADC, OCOM, OFON 350 */ 351 static const u8 frame_size_reg_addr[NUM_FMT_REGS] = { 352 0x12, 0x0c, 0x0d, 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03, 353 0x2a, 0x2b, 0x37, 0x38, 0x39, 354 }; 355 356 static const u8 ov965x_sxga_regs[NUM_FMT_REGS] = { 357 0x00, 0x00, 0x00, 0x1e, 0xbe, 0xbf, 0x01, 0x81, 0x12, 358 0x10, 0x34, 0x81, 0x93, 0x51, 359 }; 360 361 static const u8 ov965x_vga_regs[NUM_FMT_REGS] = { 362 0x40, 0x04, 0x80, 0x26, 0xc6, 0xed, 0x01, 0x3d, 0x00, 363 0x10, 0x40, 0x91, 0x12, 0x43, 364 }; 365 366 /* Determined empirically. */ 367 static const u8 ov965x_qvga_regs[NUM_FMT_REGS] = { 368 0x10, 0x04, 0x80, 0x25, 0xc5, 0xbf, 0x00, 0x80, 0x12, 369 0x10, 0x40, 0x91, 0x12, 0x43, 370 }; 371 372 static const struct ov965x_framesize ov965x_framesizes[] = { 373 { 374 .width = SXGA_WIDTH, 375 .height = SXGA_HEIGHT, 376 .regs = ov965x_sxga_regs, 377 .max_exp_lines = 1048, 378 }, { 379 .width = VGA_WIDTH, 380 .height = VGA_HEIGHT, 381 .regs = ov965x_vga_regs, 382 .max_exp_lines = 498, 383 }, { 384 .width = QVGA_WIDTH, 385 .height = QVGA_HEIGHT, 386 .regs = ov965x_qvga_regs, 387 .max_exp_lines = 248, 388 }, 389 }; 390 391 struct ov965x_pixfmt { 392 u32 code; 393 u32 colorspace; 394 /* REG_TSLB value, only bits [3:2] may be set. */ 395 u8 tslb_reg; 396 }; 397 398 static const struct ov965x_pixfmt ov965x_formats[] = { 399 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 0x00}, 400 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG, 0x04}, 401 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG, 0x0c}, 402 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 0x08}, 403 }; 404 405 /* 406 * This table specifies possible frame resolution and interval 407 * combinations. Default CLKRC[5:0] divider values are valid 408 * only for 24 MHz external clock frequency. 409 */ 410 static struct ov965x_interval ov965x_intervals[] = { 411 {{ 100, 625 }, { SXGA_WIDTH, SXGA_HEIGHT }, 0 }, /* 6.25 fps */ 412 {{ 10, 125 }, { VGA_WIDTH, VGA_HEIGHT }, 1 }, /* 12.5 fps */ 413 {{ 10, 125 }, { QVGA_WIDTH, QVGA_HEIGHT }, 3 }, /* 12.5 fps */ 414 {{ 1, 25 }, { VGA_WIDTH, VGA_HEIGHT }, 0 }, /* 25 fps */ 415 {{ 1, 25 }, { QVGA_WIDTH, QVGA_HEIGHT }, 1 }, /* 25 fps */ 416 }; 417 418 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 419 { 420 return &container_of(ctrl->handler, struct ov965x, ctrls.handler)->sd; 421 } 422 423 static inline struct ov965x *to_ov965x(struct v4l2_subdev *sd) 424 { 425 return container_of(sd, struct ov965x, sd); 426 } 427 428 static int ov965x_read(struct ov965x *ov965x, u8 addr, u8 *val) 429 { 430 int ret; 431 unsigned int buf; 432 433 ret = regmap_read(ov965x->regmap, addr, &buf); 434 if (!ret) 435 *val = buf; 436 else 437 *val = -1; 438 439 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02x. (%d)\n", 440 __func__, *val, addr, ret); 441 442 return ret; 443 } 444 445 static int ov965x_write(struct ov965x *ov965x, u8 addr, u8 val) 446 { 447 int ret; 448 449 ret = regmap_write(ov965x->regmap, addr, val); 450 451 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02X (%d)\n", 452 __func__, val, addr, ret); 453 454 return ret; 455 } 456 457 static int ov965x_write_array(struct ov965x *ov965x, 458 const struct i2c_rv *regs) 459 { 460 int i, ret = 0; 461 462 for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) 463 ret = ov965x_write(ov965x, regs[i].addr, regs[i].value); 464 465 return ret; 466 } 467 468 static int ov965x_set_default_gamma_curve(struct ov965x *ov965x) 469 { 470 static const u8 gamma_curve[] = { 471 /* Values taken from OV application note. */ 472 0x40, 0x30, 0x4b, 0x60, 0x70, 0x70, 0x70, 0x70, 473 0x60, 0x60, 0x50, 0x48, 0x3a, 0x2e, 0x28, 0x22, 474 0x04, 0x07, 0x10, 0x28, 0x36, 0x44, 0x52, 0x60, 475 0x6c, 0x78, 0x8c, 0x9e, 0xbb, 0xd2, 0xe6 476 }; 477 u8 addr = REG_GSP; 478 unsigned int i; 479 480 for (i = 0; i < ARRAY_SIZE(gamma_curve); i++) { 481 int ret = ov965x_write(ov965x, addr, gamma_curve[i]); 482 483 if (ret < 0) 484 return ret; 485 addr++; 486 } 487 488 return 0; 489 }; 490 491 static int ov965x_set_color_matrix(struct ov965x *ov965x) 492 { 493 static const u8 mtx[] = { 494 /* MTX1..MTX9, MTXS */ 495 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38, 0x40, 0x40, 0x40, 0x0d 496 }; 497 u8 addr = REG_MTX(1); 498 unsigned int i; 499 500 for (i = 0; i < ARRAY_SIZE(mtx); i++) { 501 int ret = ov965x_write(ov965x, addr, mtx[i]); 502 503 if (ret < 0) 504 return ret; 505 addr++; 506 } 507 508 return 0; 509 } 510 511 static int __ov965x_set_power(struct ov965x *ov965x, int on) 512 { 513 if (on) { 514 int ret = clk_prepare_enable(ov965x->clk); 515 516 if (ret) 517 return ret; 518 519 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 0); 520 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 0); 521 msleep(25); 522 } else { 523 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 1); 524 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 1); 525 526 clk_disable_unprepare(ov965x->clk); 527 } 528 529 ov965x->streaming = 0; 530 531 return 0; 532 } 533 534 static int ov965x_s_power(struct v4l2_subdev *sd, int on) 535 { 536 struct ov965x *ov965x = to_ov965x(sd); 537 int ret = 0; 538 539 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on); 540 541 mutex_lock(&ov965x->lock); 542 if (ov965x->power == !on) { 543 ret = __ov965x_set_power(ov965x, on); 544 if (!ret && on) { 545 ret = ov965x_write_array(ov965x, 546 ov965x_init_regs); 547 ov965x->apply_frame_fmt = 1; 548 ov965x->ctrls.update = 1; 549 } 550 } 551 if (!ret) 552 ov965x->power += on ? 1 : -1; 553 554 WARN_ON(ov965x->power < 0); 555 mutex_unlock(&ov965x->lock); 556 return ret; 557 } 558 559 /* 560 * V4L2 controls 561 */ 562 563 static void ov965x_update_exposure_ctrl(struct ov965x *ov965x) 564 { 565 struct v4l2_ctrl *ctrl = ov965x->ctrls.exposure; 566 unsigned long fint, trow; 567 int min, max, def; 568 u8 clkrc; 569 570 mutex_lock(&ov965x->lock); 571 if (WARN_ON(!ctrl || !ov965x->frame_size)) { 572 mutex_unlock(&ov965x->lock); 573 return; 574 } 575 clkrc = DEF_CLKRC + ov965x->fiv->clkrc_div; 576 /* Calculate internal clock frequency */ 577 fint = ov965x->mclk_frequency * ((clkrc >> 7) + 1) / 578 ((2 * ((clkrc & 0x3f) + 1))); 579 /* and the row interval (in us). */ 580 trow = (2 * 1520 * 1000000UL) / fint; 581 max = ov965x->frame_size->max_exp_lines * trow; 582 ov965x->exp_row_interval = trow; 583 mutex_unlock(&ov965x->lock); 584 585 v4l2_dbg(1, debug, &ov965x->sd, "clkrc: %#x, fi: %lu, tr: %lu, %d\n", 586 clkrc, fint, trow, max); 587 588 /* Update exposure time range to match current frame format. */ 589 min = (trow + 100) / 100; 590 max = (max - 100) / 100; 591 def = min + (max - min) / 2; 592 593 if (v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) 594 v4l2_err(&ov965x->sd, "Exposure ctrl range update failed\n"); 595 } 596 597 static int ov965x_set_banding_filter(struct ov965x *ov965x, int value) 598 { 599 unsigned long mbd, light_freq; 600 int ret; 601 u8 reg; 602 603 ret = ov965x_read(ov965x, REG_COM8, ®); 604 if (!ret) { 605 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) 606 reg &= ~COM8_BFILT; 607 else 608 reg |= COM8_BFILT; 609 ret = ov965x_write(ov965x, REG_COM8, reg); 610 } 611 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) 612 return 0; 613 if (WARN_ON(!ov965x->fiv)) 614 return -EINVAL; 615 /* Set minimal exposure time for 50/60 HZ lighting */ 616 if (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) 617 light_freq = 50; 618 else 619 light_freq = 60; 620 mbd = (1000UL * ov965x->fiv->interval.denominator * 621 ov965x->frame_size->max_exp_lines) / 622 ov965x->fiv->interval.numerator; 623 mbd = ((mbd / (light_freq * 2)) + 500) / 1000UL; 624 625 return ov965x_write(ov965x, REG_MBD, mbd); 626 } 627 628 static int ov965x_set_white_balance(struct ov965x *ov965x, int awb) 629 { 630 int ret; 631 u8 reg; 632 633 ret = ov965x_read(ov965x, REG_COM8, ®); 634 if (!ret) { 635 reg = awb ? reg | REG_COM8 : reg & ~REG_COM8; 636 ret = ov965x_write(ov965x, REG_COM8, reg); 637 } 638 if (!ret && !awb) { 639 ret = ov965x_write(ov965x, REG_BLUE, 640 ov965x->ctrls.blue_balance->val); 641 if (ret < 0) 642 return ret; 643 ret = ov965x_write(ov965x, REG_RED, 644 ov965x->ctrls.red_balance->val); 645 } 646 return ret; 647 } 648 649 #define NUM_BR_LEVELS 7 650 #define NUM_BR_REGS 3 651 652 static int ov965x_set_brightness(struct ov965x *ov965x, int val) 653 { 654 static const u8 regs[NUM_BR_LEVELS + 1][NUM_BR_REGS] = { 655 { REG_AEW, REG_AEB, REG_VPT }, 656 { 0x1c, 0x12, 0x50 }, /* -3 */ 657 { 0x3d, 0x30, 0x71 }, /* -2 */ 658 { 0x50, 0x44, 0x92 }, /* -1 */ 659 { 0x70, 0x64, 0xc3 }, /* 0 */ 660 { 0x90, 0x84, 0xd4 }, /* +1 */ 661 { 0xc4, 0xbf, 0xf9 }, /* +2 */ 662 { 0xd8, 0xd0, 0xfa }, /* +3 */ 663 }; 664 int i, ret = 0; 665 666 val += (NUM_BR_LEVELS / 2 + 1); 667 if (val > NUM_BR_LEVELS) 668 return -EINVAL; 669 670 for (i = 0; i < NUM_BR_REGS && !ret; i++) 671 ret = ov965x_write(ov965x, regs[0][i], 672 regs[val][i]); 673 return ret; 674 } 675 676 static int ov965x_set_gain(struct ov965x *ov965x, int auto_gain) 677 { 678 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 679 int ret = 0; 680 u8 reg; 681 /* 682 * For manual mode we need to disable AGC first, so 683 * gain value in REG_VREF, REG_GAIN is not overwritten. 684 */ 685 if (ctrls->auto_gain->is_new) { 686 ret = ov965x_read(ov965x, REG_COM8, ®); 687 if (ret < 0) 688 return ret; 689 if (ctrls->auto_gain->val) 690 reg |= COM8_AGC; 691 else 692 reg &= ~COM8_AGC; 693 ret = ov965x_write(ov965x, REG_COM8, reg); 694 if (ret < 0) 695 return ret; 696 } 697 698 if (ctrls->gain->is_new && !auto_gain) { 699 unsigned int gain = ctrls->gain->val; 700 unsigned int rgain; 701 int m; 702 /* 703 * Convert gain control value to the sensor's gain 704 * registers (VREF[7:6], GAIN[7:0]) format. 705 */ 706 for (m = 6; m >= 0; m--) 707 if (gain >= (1 << m) * 16) 708 break; 709 rgain = (gain - ((1 << m) * 16)) / (1 << m); 710 rgain |= (((1 << m) - 1) << 4); 711 712 ret = ov965x_write(ov965x, REG_GAIN, rgain & 0xff); 713 if (ret < 0) 714 return ret; 715 ret = ov965x_read(ov965x, REG_VREF, ®); 716 if (ret < 0) 717 return ret; 718 reg &= ~VREF_GAIN_MASK; 719 reg |= (((rgain >> 8) & 0x3) << 6); 720 ret = ov965x_write(ov965x, REG_VREF, reg); 721 if (ret < 0) 722 return ret; 723 /* Return updated control's value to userspace */ 724 ctrls->gain->val = (1 << m) * (16 + (rgain & 0xf)); 725 } 726 727 return ret; 728 } 729 730 static int ov965x_set_sharpness(struct ov965x *ov965x, unsigned int value) 731 { 732 u8 com14, edge; 733 int ret; 734 735 ret = ov965x_read(ov965x, REG_COM14, &com14); 736 if (ret < 0) 737 return ret; 738 ret = ov965x_read(ov965x, REG_EDGE, &edge); 739 if (ret < 0) 740 return ret; 741 com14 = value ? com14 | COM14_EDGE_EN : com14 & ~COM14_EDGE_EN; 742 value--; 743 if (value > 0x0f) { 744 com14 |= COM14_EEF_X2; 745 value >>= 1; 746 } else { 747 com14 &= ~COM14_EEF_X2; 748 } 749 ret = ov965x_write(ov965x, REG_COM14, com14); 750 if (ret < 0) 751 return ret; 752 753 edge &= ~EDGE_FACTOR_MASK; 754 edge |= ((u8)value & 0x0f); 755 756 return ov965x_write(ov965x, REG_EDGE, edge); 757 } 758 759 static int ov965x_set_exposure(struct ov965x *ov965x, int exp) 760 { 761 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 762 bool auto_exposure = (exp == V4L2_EXPOSURE_AUTO); 763 int ret; 764 u8 reg; 765 766 if (ctrls->auto_exp->is_new) { 767 ret = ov965x_read(ov965x, REG_COM8, ®); 768 if (ret < 0) 769 return ret; 770 if (auto_exposure) 771 reg |= (COM8_AEC | COM8_AGC); 772 else 773 reg &= ~(COM8_AEC | COM8_AGC); 774 ret = ov965x_write(ov965x, REG_COM8, reg); 775 if (ret < 0) 776 return ret; 777 } 778 779 if (!auto_exposure && ctrls->exposure->is_new) { 780 unsigned int exposure = (ctrls->exposure->val * 100) 781 / ov965x->exp_row_interval; 782 /* 783 * Manual exposure value 784 * [b15:b0] - AECHM (b15:b10), AECH (b9:b2), COM1 (b1:b0) 785 */ 786 ret = ov965x_write(ov965x, REG_COM1, exposure & 0x3); 787 if (!ret) 788 ret = ov965x_write(ov965x, REG_AECH, 789 (exposure >> 2) & 0xff); 790 if (!ret) 791 ret = ov965x_write(ov965x, REG_AECHM, 792 (exposure >> 10) & 0x3f); 793 /* Update the value to minimize rounding errors */ 794 ctrls->exposure->val = ((exposure * ov965x->exp_row_interval) 795 + 50) / 100; 796 if (ret < 0) 797 return ret; 798 } 799 800 v4l2_ctrl_activate(ov965x->ctrls.brightness, !exp); 801 return 0; 802 } 803 804 static int ov965x_set_flip(struct ov965x *ov965x) 805 { 806 u8 mvfp = 0; 807 808 if (ov965x->ctrls.hflip->val) 809 mvfp |= MVFP_MIRROR; 810 811 if (ov965x->ctrls.vflip->val) 812 mvfp |= MVFP_FLIP; 813 814 return ov965x_write(ov965x, REG_MVFP, mvfp); 815 } 816 817 #define NUM_SAT_LEVELS 5 818 #define NUM_SAT_REGS 6 819 820 static int ov965x_set_saturation(struct ov965x *ov965x, int val) 821 { 822 static const u8 regs[NUM_SAT_LEVELS][NUM_SAT_REGS] = { 823 /* MTX(1)...MTX(6) */ 824 { 0x1d, 0x1f, 0x02, 0x09, 0x13, 0x1c }, /* -2 */ 825 { 0x2e, 0x31, 0x02, 0x0e, 0x1e, 0x2d }, /* -1 */ 826 { 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38 }, /* 0 */ 827 { 0x46, 0x49, 0x04, 0x16, 0x2e, 0x43 }, /* +1 */ 828 { 0x57, 0x5c, 0x05, 0x1b, 0x39, 0x54 }, /* +2 */ 829 }; 830 u8 addr = REG_MTX(1); 831 int i, ret = 0; 832 833 val += (NUM_SAT_LEVELS / 2); 834 if (val >= NUM_SAT_LEVELS) 835 return -EINVAL; 836 837 for (i = 0; i < NUM_SAT_REGS && !ret; i++) 838 ret = ov965x_write(ov965x, addr + i, regs[val][i]); 839 840 return ret; 841 } 842 843 static int ov965x_set_test_pattern(struct ov965x *ov965x, int value) 844 { 845 int ret; 846 u8 reg; 847 848 ret = ov965x_read(ov965x, REG_COM23, ®); 849 if (ret < 0) 850 return ret; 851 reg = value ? reg | COM23_TEST_MODE : reg & ~COM23_TEST_MODE; 852 return ov965x_write(ov965x, REG_COM23, reg); 853 } 854 855 static int __g_volatile_ctrl(struct ov965x *ov965x, struct v4l2_ctrl *ctrl) 856 { 857 unsigned int exposure, gain, m; 858 u8 reg0, reg1, reg2; 859 int ret; 860 861 if (!ov965x->power) 862 return 0; 863 864 switch (ctrl->id) { 865 case V4L2_CID_AUTOGAIN: 866 if (!ctrl->val) 867 return 0; 868 ret = ov965x_read(ov965x, REG_GAIN, ®0); 869 if (ret < 0) 870 return ret; 871 ret = ov965x_read(ov965x, REG_VREF, ®1); 872 if (ret < 0) 873 return ret; 874 gain = ((reg1 >> 6) << 8) | reg0; 875 m = 0x01 << fls(gain >> 4); 876 ov965x->ctrls.gain->val = m * (16 + (gain & 0xf)); 877 break; 878 879 case V4L2_CID_EXPOSURE_AUTO: 880 if (ctrl->val == V4L2_EXPOSURE_MANUAL) 881 return 0; 882 ret = ov965x_read(ov965x, REG_COM1, ®0); 883 if (ret < 0) 884 return ret; 885 ret = ov965x_read(ov965x, REG_AECH, ®1); 886 if (ret < 0) 887 return ret; 888 ret = ov965x_read(ov965x, REG_AECHM, ®2); 889 if (ret < 0) 890 return ret; 891 exposure = ((reg2 & 0x3f) << 10) | (reg1 << 2) | 892 (reg0 & 0x3); 893 ov965x->ctrls.exposure->val = ((exposure * 894 ov965x->exp_row_interval) + 50) / 100; 895 break; 896 } 897 898 return 0; 899 } 900 901 static int ov965x_g_volatile_ctrl(struct v4l2_ctrl *ctrl) 902 { 903 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 904 struct ov965x *ov965x = to_ov965x(sd); 905 int ret; 906 907 v4l2_dbg(1, debug, sd, "g_ctrl: %s\n", ctrl->name); 908 909 mutex_lock(&ov965x->lock); 910 ret = __g_volatile_ctrl(ov965x, ctrl); 911 mutex_unlock(&ov965x->lock); 912 return ret; 913 } 914 915 static int ov965x_s_ctrl(struct v4l2_ctrl *ctrl) 916 { 917 struct v4l2_subdev *sd = ctrl_to_sd(ctrl); 918 struct ov965x *ov965x = to_ov965x(sd); 919 int ret = -EINVAL; 920 921 v4l2_dbg(1, debug, sd, "s_ctrl: %s, value: %d. power: %d\n", 922 ctrl->name, ctrl->val, ov965x->power); 923 924 mutex_lock(&ov965x->lock); 925 /* 926 * If the device is not powered up now postpone applying control's 927 * value to the hardware, until it is ready to accept commands. 928 */ 929 if (ov965x->power == 0) { 930 mutex_unlock(&ov965x->lock); 931 return 0; 932 } 933 934 switch (ctrl->id) { 935 case V4L2_CID_AUTO_WHITE_BALANCE: 936 ret = ov965x_set_white_balance(ov965x, ctrl->val); 937 break; 938 939 case V4L2_CID_BRIGHTNESS: 940 ret = ov965x_set_brightness(ov965x, ctrl->val); 941 break; 942 943 case V4L2_CID_EXPOSURE_AUTO: 944 ret = ov965x_set_exposure(ov965x, ctrl->val); 945 break; 946 947 case V4L2_CID_AUTOGAIN: 948 ret = ov965x_set_gain(ov965x, ctrl->val); 949 break; 950 951 case V4L2_CID_HFLIP: 952 ret = ov965x_set_flip(ov965x); 953 break; 954 955 case V4L2_CID_POWER_LINE_FREQUENCY: 956 ret = ov965x_set_banding_filter(ov965x, ctrl->val); 957 break; 958 959 case V4L2_CID_SATURATION: 960 ret = ov965x_set_saturation(ov965x, ctrl->val); 961 break; 962 963 case V4L2_CID_SHARPNESS: 964 ret = ov965x_set_sharpness(ov965x, ctrl->val); 965 break; 966 967 case V4L2_CID_TEST_PATTERN: 968 ret = ov965x_set_test_pattern(ov965x, ctrl->val); 969 break; 970 } 971 972 mutex_unlock(&ov965x->lock); 973 return ret; 974 } 975 976 static const struct v4l2_ctrl_ops ov965x_ctrl_ops = { 977 .g_volatile_ctrl = ov965x_g_volatile_ctrl, 978 .s_ctrl = ov965x_s_ctrl, 979 }; 980 981 static const char * const test_pattern_menu[] = { 982 "Disabled", 983 "Color bars", 984 }; 985 986 static int ov965x_initialize_controls(struct ov965x *ov965x) 987 { 988 const struct v4l2_ctrl_ops *ops = &ov965x_ctrl_ops; 989 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 990 struct v4l2_ctrl_handler *hdl = &ctrls->handler; 991 int ret; 992 993 ret = v4l2_ctrl_handler_init(hdl, 16); 994 if (ret < 0) 995 return ret; 996 997 /* Auto/manual white balance */ 998 ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops, 999 V4L2_CID_AUTO_WHITE_BALANCE, 1000 0, 1, 1, 1); 1001 ctrls->blue_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE, 1002 0, 0xff, 1, 0x80); 1003 ctrls->red_balance = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE, 1004 0, 0xff, 1, 0x80); 1005 /* Auto/manual exposure */ 1006 ctrls->auto_exp = 1007 v4l2_ctrl_new_std_menu(hdl, ops, 1008 V4L2_CID_EXPOSURE_AUTO, 1009 V4L2_EXPOSURE_MANUAL, 0, 1010 V4L2_EXPOSURE_AUTO); 1011 /* Exposure time, in 100 us units. min/max is updated dynamically. */ 1012 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, 1013 V4L2_CID_EXPOSURE_ABSOLUTE, 1014 2, 1500, 1, 500); 1015 /* Auto/manual gain */ 1016 ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN, 1017 0, 1, 1, 1); 1018 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 1019 16, 64 * (16 + 15), 1, 64 * 16); 1020 1021 ctrls->saturation = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, 1022 -2, 2, 1, 0); 1023 ctrls->brightness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, 1024 -3, 3, 1, 0); 1025 ctrls->sharpness = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, 1026 0, 32, 1, 6); 1027 1028 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); 1029 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); 1030 1031 ctrls->light_freq = 1032 v4l2_ctrl_new_std_menu(hdl, ops, 1033 V4L2_CID_POWER_LINE_FREQUENCY, 1034 V4L2_CID_POWER_LINE_FREQUENCY_60HZ, ~0x7, 1035 V4L2_CID_POWER_LINE_FREQUENCY_50HZ); 1036 1037 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN, 1038 ARRAY_SIZE(test_pattern_menu) - 1, 0, 0, 1039 test_pattern_menu); 1040 if (hdl->error) { 1041 ret = hdl->error; 1042 v4l2_ctrl_handler_free(hdl); 1043 return ret; 1044 } 1045 1046 ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; 1047 ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; 1048 1049 v4l2_ctrl_auto_cluster(3, &ctrls->auto_wb, 0, false); 1050 v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true); 1051 v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true); 1052 v4l2_ctrl_cluster(2, &ctrls->hflip); 1053 1054 ov965x->sd.ctrl_handler = hdl; 1055 return 0; 1056 } 1057 1058 /* 1059 * V4L2 subdev video and pad level operations 1060 */ 1061 static void ov965x_get_default_format(struct v4l2_mbus_framefmt *mf) 1062 { 1063 mf->width = ov965x_framesizes[0].width; 1064 mf->height = ov965x_framesizes[0].height; 1065 mf->colorspace = ov965x_formats[0].colorspace; 1066 mf->code = ov965x_formats[0].code; 1067 mf->field = V4L2_FIELD_NONE; 1068 } 1069 1070 static int ov965x_enum_mbus_code(struct v4l2_subdev *sd, 1071 struct v4l2_subdev_pad_config *cfg, 1072 struct v4l2_subdev_mbus_code_enum *code) 1073 { 1074 if (code->index >= ARRAY_SIZE(ov965x_formats)) 1075 return -EINVAL; 1076 1077 code->code = ov965x_formats[code->index].code; 1078 return 0; 1079 } 1080 1081 static int ov965x_enum_frame_sizes(struct v4l2_subdev *sd, 1082 struct v4l2_subdev_pad_config *cfg, 1083 struct v4l2_subdev_frame_size_enum *fse) 1084 { 1085 int i = ARRAY_SIZE(ov965x_formats); 1086 1087 if (fse->index >= ARRAY_SIZE(ov965x_framesizes)) 1088 return -EINVAL; 1089 1090 while (--i) 1091 if (fse->code == ov965x_formats[i].code) 1092 break; 1093 1094 fse->code = ov965x_formats[i].code; 1095 1096 fse->min_width = ov965x_framesizes[fse->index].width; 1097 fse->max_width = fse->min_width; 1098 fse->max_height = ov965x_framesizes[fse->index].height; 1099 fse->min_height = fse->max_height; 1100 1101 return 0; 1102 } 1103 1104 static int ov965x_g_frame_interval(struct v4l2_subdev *sd, 1105 struct v4l2_subdev_frame_interval *fi) 1106 { 1107 struct ov965x *ov965x = to_ov965x(sd); 1108 1109 mutex_lock(&ov965x->lock); 1110 fi->interval = ov965x->fiv->interval; 1111 mutex_unlock(&ov965x->lock); 1112 1113 return 0; 1114 } 1115 1116 static int __ov965x_set_frame_interval(struct ov965x *ov965x, 1117 struct v4l2_subdev_frame_interval *fi) 1118 { 1119 struct v4l2_mbus_framefmt *mbus_fmt = &ov965x->format; 1120 const struct ov965x_interval *fiv = &ov965x_intervals[0]; 1121 u64 req_int, err, min_err = ~0ULL; 1122 unsigned int i; 1123 1124 if (fi->interval.denominator == 0) 1125 return -EINVAL; 1126 1127 req_int = (u64)fi->interval.numerator * 10000; 1128 do_div(req_int, fi->interval.denominator); 1129 1130 for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) { 1131 const struct ov965x_interval *iv = &ov965x_intervals[i]; 1132 1133 if (mbus_fmt->width != iv->size.width || 1134 mbus_fmt->height != iv->size.height) 1135 continue; 1136 err = abs((u64)(iv->interval.numerator * 10000) / 1137 iv->interval.denominator - req_int); 1138 if (err < min_err) { 1139 fiv = iv; 1140 min_err = err; 1141 } 1142 } 1143 ov965x->fiv = fiv; 1144 1145 v4l2_dbg(1, debug, &ov965x->sd, "Changed frame interval to %u us\n", 1146 fiv->interval.numerator * 1000000 / fiv->interval.denominator); 1147 1148 return 0; 1149 } 1150 1151 static int ov965x_s_frame_interval(struct v4l2_subdev *sd, 1152 struct v4l2_subdev_frame_interval *fi) 1153 { 1154 struct ov965x *ov965x = to_ov965x(sd); 1155 int ret; 1156 1157 v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n", 1158 fi->interval.numerator, fi->interval.denominator); 1159 1160 mutex_lock(&ov965x->lock); 1161 ret = __ov965x_set_frame_interval(ov965x, fi); 1162 ov965x->apply_frame_fmt = 1; 1163 mutex_unlock(&ov965x->lock); 1164 return ret; 1165 } 1166 1167 static int ov965x_get_fmt(struct v4l2_subdev *sd, 1168 struct v4l2_subdev_pad_config *cfg, 1169 struct v4l2_subdev_format *fmt) 1170 { 1171 struct ov965x *ov965x = to_ov965x(sd); 1172 struct v4l2_mbus_framefmt *mf; 1173 1174 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1175 mf = v4l2_subdev_get_try_format(sd, cfg, 0); 1176 fmt->format = *mf; 1177 return 0; 1178 } 1179 1180 mutex_lock(&ov965x->lock); 1181 fmt->format = ov965x->format; 1182 mutex_unlock(&ov965x->lock); 1183 1184 return 0; 1185 } 1186 1187 static void __ov965x_try_frame_size(struct v4l2_mbus_framefmt *mf, 1188 const struct ov965x_framesize **size) 1189 { 1190 const struct ov965x_framesize *fsize = &ov965x_framesizes[0], 1191 *match = NULL; 1192 int i = ARRAY_SIZE(ov965x_framesizes); 1193 unsigned int min_err = UINT_MAX; 1194 1195 while (i--) { 1196 int err = abs(fsize->width - mf->width) 1197 + abs(fsize->height - mf->height); 1198 if (err < min_err) { 1199 min_err = err; 1200 match = fsize; 1201 } 1202 fsize++; 1203 } 1204 if (!match) 1205 match = &ov965x_framesizes[0]; 1206 mf->width = match->width; 1207 mf->height = match->height; 1208 if (size) 1209 *size = match; 1210 } 1211 1212 static int ov965x_set_fmt(struct v4l2_subdev *sd, 1213 struct v4l2_subdev_pad_config *cfg, 1214 struct v4l2_subdev_format *fmt) 1215 { 1216 unsigned int index = ARRAY_SIZE(ov965x_formats); 1217 struct v4l2_mbus_framefmt *mf = &fmt->format; 1218 struct ov965x *ov965x = to_ov965x(sd); 1219 const struct ov965x_framesize *size = NULL; 1220 int ret = 0; 1221 1222 __ov965x_try_frame_size(mf, &size); 1223 1224 while (--index) 1225 if (ov965x_formats[index].code == mf->code) 1226 break; 1227 1228 mf->colorspace = V4L2_COLORSPACE_JPEG; 1229 mf->code = ov965x_formats[index].code; 1230 mf->field = V4L2_FIELD_NONE; 1231 1232 mutex_lock(&ov965x->lock); 1233 1234 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1235 if (cfg) { 1236 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); 1237 *mf = fmt->format; 1238 } 1239 } else { 1240 if (ov965x->streaming) { 1241 ret = -EBUSY; 1242 } else { 1243 ov965x->frame_size = size; 1244 ov965x->format = fmt->format; 1245 ov965x->tslb_reg = ov965x_formats[index].tslb_reg; 1246 ov965x->apply_frame_fmt = 1; 1247 } 1248 } 1249 1250 if (!ret && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 1251 struct v4l2_subdev_frame_interval fiv = { 1252 .interval = { 0, 1 } 1253 }; 1254 /* Reset to minimum possible frame interval */ 1255 __ov965x_set_frame_interval(ov965x, &fiv); 1256 } 1257 mutex_unlock(&ov965x->lock); 1258 1259 if (!ret) 1260 ov965x_update_exposure_ctrl(ov965x); 1261 1262 return ret; 1263 } 1264 1265 static int ov965x_set_frame_size(struct ov965x *ov965x) 1266 { 1267 int i, ret = 0; 1268 1269 for (i = 0; ret == 0 && i < NUM_FMT_REGS; i++) 1270 ret = ov965x_write(ov965x, frame_size_reg_addr[i], 1271 ov965x->frame_size->regs[i]); 1272 return ret; 1273 } 1274 1275 static int __ov965x_set_params(struct ov965x *ov965x) 1276 { 1277 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 1278 int ret = 0; 1279 u8 reg; 1280 1281 if (ov965x->apply_frame_fmt) { 1282 reg = DEF_CLKRC + ov965x->fiv->clkrc_div; 1283 ret = ov965x_write(ov965x, REG_CLKRC, reg); 1284 if (ret < 0) 1285 return ret; 1286 ret = ov965x_set_frame_size(ov965x); 1287 if (ret < 0) 1288 return ret; 1289 ret = ov965x_read(ov965x, REG_TSLB, ®); 1290 if (ret < 0) 1291 return ret; 1292 reg &= ~TSLB_YUYV_MASK; 1293 reg |= ov965x->tslb_reg; 1294 ret = ov965x_write(ov965x, REG_TSLB, reg); 1295 if (ret < 0) 1296 return ret; 1297 } 1298 ret = ov965x_set_default_gamma_curve(ov965x); 1299 if (ret < 0) 1300 return ret; 1301 ret = ov965x_set_color_matrix(ov965x); 1302 if (ret < 0) 1303 return ret; 1304 /* 1305 * Select manual banding filter, the filter will 1306 * be enabled further if required. 1307 */ 1308 ret = ov965x_read(ov965x, REG_COM11, ®); 1309 if (!ret) 1310 reg |= COM11_BANDING; 1311 ret = ov965x_write(ov965x, REG_COM11, reg); 1312 if (ret < 0) 1313 return ret; 1314 /* 1315 * Banding filter (REG_MBD value) needs to match selected 1316 * resolution and frame rate, so it's always updated here. 1317 */ 1318 return ov965x_set_banding_filter(ov965x, ctrls->light_freq->val); 1319 } 1320 1321 static int ov965x_s_stream(struct v4l2_subdev *sd, int on) 1322 { 1323 struct ov965x *ov965x = to_ov965x(sd); 1324 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 1325 int ret = 0; 1326 1327 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on); 1328 1329 mutex_lock(&ov965x->lock); 1330 if (ov965x->streaming == !on) { 1331 if (on) 1332 ret = __ov965x_set_params(ov965x); 1333 1334 if (!ret && ctrls->update) { 1335 /* 1336 * ov965x_s_ctrl callback takes the mutex 1337 * so it needs to be released here. 1338 */ 1339 mutex_unlock(&ov965x->lock); 1340 ret = v4l2_ctrl_handler_setup(&ctrls->handler); 1341 1342 mutex_lock(&ov965x->lock); 1343 if (!ret) 1344 ctrls->update = 0; 1345 } 1346 if (!ret) 1347 ret = ov965x_write(ov965x, REG_COM2, 1348 on ? 0x01 : 0x11); 1349 } 1350 if (!ret) 1351 ov965x->streaming += on ? 1 : -1; 1352 1353 WARN_ON(ov965x->streaming < 0); 1354 mutex_unlock(&ov965x->lock); 1355 1356 return ret; 1357 } 1358 1359 /* 1360 * V4L2 subdev internal operations 1361 */ 1362 static int ov965x_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1363 { 1364 struct v4l2_mbus_framefmt *mf = 1365 v4l2_subdev_get_try_format(sd, fh->pad, 0); 1366 1367 ov965x_get_default_format(mf); 1368 return 0; 1369 } 1370 1371 static const struct v4l2_subdev_pad_ops ov965x_pad_ops = { 1372 .enum_mbus_code = ov965x_enum_mbus_code, 1373 .enum_frame_size = ov965x_enum_frame_sizes, 1374 .get_fmt = ov965x_get_fmt, 1375 .set_fmt = ov965x_set_fmt, 1376 }; 1377 1378 static const struct v4l2_subdev_video_ops ov965x_video_ops = { 1379 .s_stream = ov965x_s_stream, 1380 .g_frame_interval = ov965x_g_frame_interval, 1381 .s_frame_interval = ov965x_s_frame_interval, 1382 1383 }; 1384 1385 static const struct v4l2_subdev_internal_ops ov965x_sd_internal_ops = { 1386 .open = ov965x_open, 1387 }; 1388 1389 static const struct v4l2_subdev_core_ops ov965x_core_ops = { 1390 .s_power = ov965x_s_power, 1391 .log_status = v4l2_ctrl_subdev_log_status, 1392 .subscribe_event = v4l2_ctrl_subdev_subscribe_event, 1393 .unsubscribe_event = v4l2_event_subdev_unsubscribe, 1394 }; 1395 1396 static const struct v4l2_subdev_ops ov965x_subdev_ops = { 1397 .core = &ov965x_core_ops, 1398 .pad = &ov965x_pad_ops, 1399 .video = &ov965x_video_ops, 1400 }; 1401 1402 /* 1403 * Reset and power down GPIOs configuration 1404 */ 1405 static int ov965x_configure_gpios_pdata(struct ov965x *ov965x, 1406 const struct ov9650_platform_data *pdata) 1407 { 1408 int ret, i; 1409 int gpios[NUM_GPIOS]; 1410 struct device *dev = regmap_get_device(ov965x->regmap); 1411 1412 gpios[GPIO_PWDN] = pdata->gpio_pwdn; 1413 gpios[GPIO_RST] = pdata->gpio_reset; 1414 1415 for (i = 0; i < ARRAY_SIZE(ov965x->gpios); i++) { 1416 int gpio = gpios[i]; 1417 1418 if (!gpio_is_valid(gpio)) 1419 continue; 1420 ret = devm_gpio_request_one(dev, gpio, 1421 GPIOF_OUT_INIT_HIGH, "OV965X"); 1422 if (ret < 0) 1423 return ret; 1424 v4l2_dbg(1, debug, &ov965x->sd, "set gpio %d to 1\n", gpio); 1425 1426 gpio_set_value_cansleep(gpio, 1); 1427 gpio_export(gpio, 0); 1428 ov965x->gpios[i] = gpio_to_desc(gpio); 1429 } 1430 1431 return 0; 1432 } 1433 1434 static int ov965x_configure_gpios(struct ov965x *ov965x) 1435 { 1436 struct device *dev = regmap_get_device(ov965x->regmap); 1437 1438 ov965x->gpios[GPIO_PWDN] = devm_gpiod_get_optional(dev, "powerdown", 1439 GPIOD_OUT_HIGH); 1440 if (IS_ERR(ov965x->gpios[GPIO_PWDN])) { 1441 dev_info(dev, "can't get %s GPIO\n", "powerdown"); 1442 return PTR_ERR(ov965x->gpios[GPIO_PWDN]); 1443 } 1444 1445 ov965x->gpios[GPIO_RST] = devm_gpiod_get_optional(dev, "reset", 1446 GPIOD_OUT_HIGH); 1447 if (IS_ERR(ov965x->gpios[GPIO_RST])) { 1448 dev_info(dev, "can't get %s GPIO\n", "reset"); 1449 return PTR_ERR(ov965x->gpios[GPIO_RST]); 1450 } 1451 1452 return 0; 1453 } 1454 1455 static int ov965x_detect_sensor(struct v4l2_subdev *sd) 1456 { 1457 struct ov965x *ov965x = to_ov965x(sd); 1458 u8 pid, ver; 1459 int ret; 1460 1461 mutex_lock(&ov965x->lock); 1462 ret = __ov965x_set_power(ov965x, 1); 1463 if (ret) 1464 goto out; 1465 1466 msleep(25); 1467 1468 /* Check sensor revision */ 1469 ret = ov965x_read(ov965x, REG_PID, &pid); 1470 if (!ret) 1471 ret = ov965x_read(ov965x, REG_VER, &ver); 1472 1473 __ov965x_set_power(ov965x, 0); 1474 1475 if (!ret) { 1476 ov965x->id = OV965X_ID(pid, ver); 1477 if (ov965x->id == OV9650_ID || ov965x->id == OV9652_ID) { 1478 v4l2_info(sd, "Found OV%04X sensor\n", ov965x->id); 1479 } else { 1480 v4l2_err(sd, "Sensor detection failed (%04X, %d)\n", 1481 ov965x->id, ret); 1482 ret = -ENODEV; 1483 } 1484 } 1485 out: 1486 mutex_unlock(&ov965x->lock); 1487 1488 return ret; 1489 } 1490 1491 static int ov965x_probe(struct i2c_client *client, 1492 const struct i2c_device_id *id) 1493 { 1494 const struct ov9650_platform_data *pdata = client->dev.platform_data; 1495 struct v4l2_subdev *sd; 1496 struct ov965x *ov965x; 1497 int ret; 1498 static const struct regmap_config ov965x_regmap_config = { 1499 .reg_bits = 8, 1500 .val_bits = 8, 1501 .max_register = 0xab, 1502 }; 1503 1504 ov965x = devm_kzalloc(&client->dev, sizeof(*ov965x), GFP_KERNEL); 1505 if (!ov965x) 1506 return -ENOMEM; 1507 1508 ov965x->regmap = devm_regmap_init_sccb(client, &ov965x_regmap_config); 1509 if (IS_ERR(ov965x->regmap)) { 1510 dev_err(&client->dev, "Failed to allocate register map\n"); 1511 return PTR_ERR(ov965x->regmap); 1512 } 1513 1514 if (pdata) { 1515 if (pdata->mclk_frequency == 0) { 1516 dev_err(&client->dev, "MCLK frequency not specified\n"); 1517 return -EINVAL; 1518 } 1519 ov965x->mclk_frequency = pdata->mclk_frequency; 1520 1521 ret = ov965x_configure_gpios_pdata(ov965x, pdata); 1522 if (ret < 0) 1523 return ret; 1524 } else if (dev_fwnode(&client->dev)) { 1525 ov965x->clk = devm_clk_get(&client->dev, NULL); 1526 if (IS_ERR(ov965x->clk)) 1527 return PTR_ERR(ov965x->clk); 1528 ov965x->mclk_frequency = clk_get_rate(ov965x->clk); 1529 1530 ret = ov965x_configure_gpios(ov965x); 1531 if (ret < 0) 1532 return ret; 1533 } else { 1534 dev_err(&client->dev, 1535 "Neither platform data nor device property specified\n"); 1536 1537 return -EINVAL; 1538 } 1539 1540 mutex_init(&ov965x->lock); 1541 1542 sd = &ov965x->sd; 1543 v4l2_i2c_subdev_init(sd, client, &ov965x_subdev_ops); 1544 strscpy(sd->name, DRIVER_NAME, sizeof(sd->name)); 1545 1546 sd->internal_ops = &ov965x_sd_internal_ops; 1547 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | 1548 V4L2_SUBDEV_FL_HAS_EVENTS; 1549 1550 ov965x->pad.flags = MEDIA_PAD_FL_SOURCE; 1551 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1552 ret = media_entity_pads_init(&sd->entity, 1, &ov965x->pad); 1553 if (ret < 0) 1554 goto err_mutex; 1555 1556 ret = ov965x_initialize_controls(ov965x); 1557 if (ret < 0) 1558 goto err_me; 1559 1560 ov965x_get_default_format(&ov965x->format); 1561 ov965x->frame_size = &ov965x_framesizes[0]; 1562 ov965x->fiv = &ov965x_intervals[0]; 1563 1564 ret = ov965x_detect_sensor(sd); 1565 if (ret < 0) 1566 goto err_ctrls; 1567 1568 /* Update exposure time min/max to match frame format */ 1569 ov965x_update_exposure_ctrl(ov965x); 1570 1571 ret = v4l2_async_register_subdev(sd); 1572 if (ret < 0) 1573 goto err_ctrls; 1574 1575 return 0; 1576 err_ctrls: 1577 v4l2_ctrl_handler_free(sd->ctrl_handler); 1578 err_me: 1579 media_entity_cleanup(&sd->entity); 1580 err_mutex: 1581 mutex_destroy(&ov965x->lock); 1582 return ret; 1583 } 1584 1585 static int ov965x_remove(struct i2c_client *client) 1586 { 1587 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1588 struct ov965x *ov965x = to_ov965x(sd); 1589 1590 v4l2_async_unregister_subdev(sd); 1591 v4l2_ctrl_handler_free(sd->ctrl_handler); 1592 media_entity_cleanup(&sd->entity); 1593 mutex_destroy(&ov965x->lock); 1594 1595 return 0; 1596 } 1597 1598 static const struct i2c_device_id ov965x_id[] = { 1599 { "OV9650", 0 }, 1600 { "OV9652", 0 }, 1601 { /* sentinel */ } 1602 }; 1603 MODULE_DEVICE_TABLE(i2c, ov965x_id); 1604 1605 #if IS_ENABLED(CONFIG_OF) 1606 static const struct of_device_id ov965x_of_match[] = { 1607 { .compatible = "ovti,ov9650", }, 1608 { .compatible = "ovti,ov9652", }, 1609 { /* sentinel */ } 1610 }; 1611 MODULE_DEVICE_TABLE(of, ov965x_of_match); 1612 #endif 1613 1614 static struct i2c_driver ov965x_i2c_driver = { 1615 .driver = { 1616 .name = DRIVER_NAME, 1617 .of_match_table = of_match_ptr(ov965x_of_match), 1618 }, 1619 .probe = ov965x_probe, 1620 .remove = ov965x_remove, 1621 .id_table = ov965x_id, 1622 }; 1623 1624 module_i2c_driver(ov965x_i2c_driver); 1625 1626 MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>"); 1627 MODULE_DESCRIPTION("OV9650/OV9652 CMOS Image Sensor driver"); 1628 MODULE_LICENSE("GPL"); 1629