1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Omnivision OV9650/OV9652 CMOS Image Sensor driver 4 * 5 * Copyright (C) 2013, Sylwester Nawrocki <sylvester.nawrocki@gmail.com> 6 * 7 * Register definitions and initial settings based on a driver written 8 * by Vladimir Fonov. 9 * Copyright (c) 2010, Vladimir Fonov 10 */ 11#include <linux/clk.h> 12#include <linux/delay.h> 13#include <linux/gpio/consumer.h> 14#include <linux/i2c.h> 15#include <linux/kernel.h> 16#include <linux/media.h> 17#include <linux/module.h> 18#include <linux/ratelimit.h> 19#include <linux/regmap.h> 20#include <linux/slab.h> 21#include <linux/string.h> 22#include <linux/videodev2.h> 23 24#include <media/media-entity.h> 25#include <media/v4l2-async.h> 26#include <media/v4l2-ctrls.h> 27#include <media/v4l2-device.h> 28#include <media/v4l2-event.h> 29#include <media/v4l2-image-sizes.h> 30#include <media/v4l2-subdev.h> 31#include <media/v4l2-mediabus.h> 32 33static int debug; 34module_param(debug, int, 0644); 35MODULE_PARM_DESC(debug, "Debug level (0-2)"); 36 37#define DRIVER_NAME "OV9650" 38 39/* 40 * OV9650/OV9652 register definitions 41 */ 42#define REG_GAIN 0x00 /* Gain control, AGC[7:0] */ 43#define REG_BLUE 0x01 /* AWB - Blue channel gain */ 44#define REG_RED 0x02 /* AWB - Red channel gain */ 45#define REG_VREF 0x03 /* [7:6] - AGC[9:8], [5:3]/[2:0] */ 46#define VREF_GAIN_MASK 0xc0 /* - VREF end/start low 3 bits */ 47#define REG_COM1 0x04 48#define COM1_CCIR656 0x40 49#define REG_B_AVE 0x05 50#define REG_GB_AVE 0x06 51#define REG_GR_AVE 0x07 52#define REG_R_AVE 0x08 53#define REG_COM2 0x09 54#define REG_PID 0x0a /* Product ID MSB */ 55#define REG_VER 0x0b /* Product ID LSB */ 56#define REG_COM3 0x0c 57#define COM3_SWAP 0x40 58#define COM3_VARIOPIXEL1 0x04 59#define REG_COM4 0x0d /* Vario Pixels */ 60#define COM4_VARIOPIXEL2 0x80 61#define REG_COM5 0x0e /* System clock options */ 62#define COM5_SLAVE_MODE 0x10 63#define COM5_SYSTEMCLOCK48MHZ 0x80 64#define REG_COM6 0x0f /* HREF & ADBLC options */ 65#define REG_AECH 0x10 /* Exposure value, AEC[9:2] */ 66#define REG_CLKRC 0x11 /* Clock control */ 67#define CLK_EXT 0x40 /* Use external clock directly */ 68#define CLK_SCALE 0x3f /* Mask for internal clock scale */ 69#define REG_COM7 0x12 /* SCCB reset, output format */ 70#define COM7_RESET 0x80 71#define COM7_FMT_MASK 0x38 72#define COM7_FMT_VGA 0x40 73#define COM7_FMT_CIF 0x20 74#define COM7_FMT_QVGA 0x10 75#define COM7_FMT_QCIF 0x08 76#define COM7_RGB 0x04 77#define COM7_YUV 0x00 78#define COM7_BAYER 0x01 79#define COM7_PBAYER 0x05 80#define REG_COM8 0x13 /* AGC/AEC options */ 81#define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ 82#define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ 83#define COM8_BFILT 0x20 /* Band filter enable */ 84#define COM8_AGC 0x04 /* Auto gain enable */ 85#define COM8_AWB 0x02 /* White balance enable */ 86#define COM8_AEC 0x01 /* Auto exposure enable */ 87#define REG_COM9 0x14 /* Gain ceiling */ 88#define COM9_GAIN_CEIL_MASK 0x70 /* */ 89#define REG_COM10 0x15 /* PCLK, HREF, HSYNC signals polarity */ 90#define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ 91#define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ 92#define COM10_HREF_REV 0x08 /* Reverse HREF */ 93#define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ 94#define COM10_VS_NEG 0x02 /* VSYNC negative */ 95#define COM10_HS_NEG 0x01 /* HSYNC negative */ 96#define REG_HSTART 0x17 /* Horiz start high bits */ 97#define REG_HSTOP 0x18 /* Horiz stop high bits */ 98#define REG_VSTART 0x19 /* Vert start high bits */ 99#define REG_VSTOP 0x1a /* Vert stop high bits */ 100#define REG_PSHFT 0x1b /* Pixel delay after HREF */ 101#define REG_MIDH 0x1c /* Manufacturer ID MSB */ 102#define REG_MIDL 0x1d /* Manufufacturer ID LSB */ 103#define REG_MVFP 0x1e /* Image mirror/flip */ 104#define MVFP_MIRROR 0x20 /* Mirror image */ 105#define MVFP_FLIP 0x10 /* Vertical flip */ 106#define REG_BOS 0x20 /* B channel Offset */ 107#define REG_GBOS 0x21 /* Gb channel Offset */ 108#define REG_GROS 0x22 /* Gr channel Offset */ 109#define REG_ROS 0x23 /* R channel Offset */ 110#define REG_AEW 0x24 /* AGC upper limit */ 111#define REG_AEB 0x25 /* AGC lower limit */ 112#define REG_VPT 0x26 /* AGC/AEC fast mode op region */ 113#define REG_BBIAS 0x27 /* B channel output bias */ 114#define REG_GBBIAS 0x28 /* Gb channel output bias */ 115#define REG_GRCOM 0x29 /* Analog BLC & regulator */ 116#define REG_EXHCH 0x2a /* Dummy pixel insert MSB */ 117#define REG_EXHCL 0x2b /* Dummy pixel insert LSB */ 118#define REG_RBIAS 0x2c /* R channel output bias */ 119#define REG_ADVFL 0x2d /* LSB of dummy line insert */ 120#define REG_ADVFH 0x2e /* MSB of dummy line insert */ 121#define REG_YAVE 0x2f /* Y/G channel average value */ 122#define REG_HSYST 0x30 /* HSYNC rising edge delay LSB*/ 123#define REG_HSYEN 0x31 /* HSYNC falling edge delay LSB*/ 124#define REG_HREF 0x32 /* HREF pieces */ 125#define REG_CHLF 0x33 /* reserved */ 126#define REG_ADC 0x37 /* reserved */ 127#define REG_ACOM 0x38 /* reserved */ 128#define REG_OFON 0x39 /* Power down register */ 129#define OFON_PWRDN 0x08 /* Power down bit */ 130#define REG_TSLB 0x3a /* YUVU format */ 131#define TSLB_YUYV_MASK 0x0c /* UYVY or VYUY - see com13 */ 132#define REG_COM11 0x3b /* Night mode, banding filter enable */ 133#define COM11_NIGHT 0x80 /* Night mode enable */ 134#define COM11_NMFR 0x60 /* Two bit NM frame rate */ 135#define COM11_BANDING 0x01 /* Banding filter */ 136#define COM11_AEC_REF_MASK 0x18 /* AEC reference area selection */ 137#define REG_COM12 0x3c /* HREF option, UV average */ 138#define COM12_HREF 0x80 /* HREF always */ 139#define REG_COM13 0x3d /* Gamma selection, Color matrix en. */ 140#define COM13_GAMMA 0x80 /* Gamma enable */ 141#define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ 142#define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ 143#define REG_COM14 0x3e /* Edge enhancement options */ 144#define COM14_EDGE_EN 0x02 145#define COM14_EEF_X2 0x01 146#define REG_EDGE 0x3f /* Edge enhancement factor */ 147#define EDGE_FACTOR_MASK 0x0f 148#define REG_COM15 0x40 /* Output range, RGB 555/565 */ 149#define COM15_R10F0 0x00 /* Data range 10 to F0 */ 150#define COM15_R01FE 0x80 /* 01 to FE */ 151#define COM15_R00FF 0xc0 /* 00 to FF */ 152#define COM15_RGB565 0x10 /* RGB565 output */ 153#define COM15_RGB555 0x30 /* RGB555 output */ 154#define COM15_SWAPRB 0x04 /* Swap R&B */ 155#define REG_COM16 0x41 /* Color matrix coeff options */ 156#define REG_COM17 0x42 /* Single frame out, banding filter */ 157/* n = 1...9, 0x4f..0x57 */ 158#define REG_MTX(__n) (0x4f + (__n) - 1) 159#define REG_MTXS 0x58 160/* Lens Correction Option 1...5, __n = 0...5 */ 161#define REG_LCC(__n) (0x62 + (__n) - 1) 162#define LCC5_LCC_ENABLE 0x01 /* LCC5, enable lens correction */ 163#define LCC5_LCC_COLOR 0x04 164#define REG_MANU 0x67 /* Manual U value */ 165#define REG_MANV 0x68 /* Manual V value */ 166#define REG_HV 0x69 /* Manual banding filter MSB */ 167#define REG_MBD 0x6a /* Manual banding filter value */ 168#define REG_DBLV 0x6b /* reserved */ 169#define REG_GSP 0x6c /* Gamma curve */ 170#define GSP_LEN 15 171#define REG_GST 0x7c /* Gamma curve */ 172#define GST_LEN 15 173#define REG_COM21 0x8b 174#define REG_COM22 0x8c /* Edge enhancement, denoising */ 175#define COM22_WHTPCOR 0x02 /* White pixel correction enable */ 176#define COM22_WHTPCOROPT 0x01 /* White pixel correction option */ 177#define COM22_DENOISE 0x10 /* White pixel correction option */ 178#define REG_COM23 0x8d /* Color bar test, color gain */ 179#define COM23_TEST_MODE 0x10 180#define REG_DBLC1 0x8f /* Digital BLC */ 181#define REG_DBLC_B 0x90 /* Digital BLC B channel offset */ 182#define REG_DBLC_R 0x91 /* Digital BLC R channel offset */ 183#define REG_DM_LNL 0x92 /* Dummy line low 8 bits */ 184#define REG_DM_LNH 0x93 /* Dummy line high 8 bits */ 185#define REG_LCCFB 0x9d /* Lens Correction B channel */ 186#define REG_LCCFR 0x9e /* Lens Correction R channel */ 187#define REG_DBLC_GB 0x9f /* Digital BLC GB chan offset */ 188#define REG_DBLC_GR 0xa0 /* Digital BLC GR chan offset */ 189#define REG_AECHM 0xa1 /* Exposure value - bits AEC[15:10] */ 190#define REG_BD50ST 0xa2 /* Banding filter value for 50Hz */ 191#define REG_BD60ST 0xa3 /* Banding filter value for 60Hz */ 192#define REG_NULL 0xff /* Array end token */ 193 194#define DEF_CLKRC 0x80 195 196#define OV965X_ID(_msb, _lsb) ((_msb) << 8 | (_lsb)) 197#define OV9650_ID 0x9650 198#define OV9652_ID 0x9652 199 200struct ov965x_ctrls { 201 struct v4l2_ctrl_handler handler; 202 struct { 203 struct v4l2_ctrl *auto_exp; 204 struct v4l2_ctrl *exposure; 205 }; 206 struct { 207 struct v4l2_ctrl *auto_wb; 208 struct v4l2_ctrl *blue_balance; 209 struct v4l2_ctrl *red_balance; 210 }; 211 struct { 212 struct v4l2_ctrl *hflip; 213 struct v4l2_ctrl *vflip; 214 }; 215 struct { 216 struct v4l2_ctrl *auto_gain; 217 struct v4l2_ctrl *gain; 218 }; 219 struct v4l2_ctrl *brightness; 220 struct v4l2_ctrl *saturation; 221 struct v4l2_ctrl *sharpness; 222 struct v4l2_ctrl *light_freq; 223 u8 update; 224}; 225 226struct ov965x_framesize { 227 u16 width; 228 u16 height; 229 u16 max_exp_lines; 230 const u8 *regs; 231}; 232 233struct ov965x_interval { 234 struct v4l2_fract interval; 235 /* Maximum resolution for this interval */ 236 struct v4l2_frmsize_discrete size; 237 u8 clkrc_div; 238}; 239 240enum gpio_id { 241 GPIO_PWDN, 242 GPIO_RST, 243 NUM_GPIOS, 244}; 245 246struct ov965x { 247 struct v4l2_subdev sd; 248 struct media_pad pad; 249 enum v4l2_mbus_type bus_type; 250 struct gpio_desc *gpios[NUM_GPIOS]; 251 /* External master clock frequency */ 252 unsigned long mclk_frequency; 253 struct clk *clk; 254 255 /* Protects the struct fields below */ 256 struct mutex lock; 257 258 struct regmap *regmap; 259 260 /* Exposure row interval in us */ 261 unsigned int exp_row_interval; 262 263 unsigned short id; 264 const struct ov965x_framesize *frame_size; 265 /* YUYV sequence (pixel format) control register */ 266 u8 tslb_reg; 267 struct v4l2_mbus_framefmt format; 268 269 struct ov965x_ctrls ctrls; 270 /* Pointer to frame rate control data structure */ 271 const struct ov965x_interval *fiv; 272 273 int streaming; 274 int power; 275 276 u8 apply_frame_fmt; 277}; 278 279struct i2c_rv { 280 u8 addr; 281 u8 value; 282}; 283 284static const struct i2c_rv ov965x_init_regs[] = { 285 { REG_COM2, 0x10 }, /* Set soft sleep mode */ 286 { REG_COM5, 0x00 }, /* System clock options */ 287 { REG_COM2, 0x01 }, /* Output drive, soft sleep mode */ 288 { REG_COM10, 0x00 }, /* Slave mode, HREF vs HSYNC, signals negate */ 289 { REG_EDGE, 0xa6 }, /* Edge enhancement treshhold and factor */ 290 { REG_COM16, 0x02 }, /* Color matrix coeff double option */ 291 { REG_COM17, 0x08 }, /* Single frame out, banding filter */ 292 { 0x16, 0x06 }, 293 { REG_CHLF, 0xc0 }, /* Reserved */ 294 { 0x34, 0xbf }, 295 { 0xa8, 0x80 }, 296 { 0x96, 0x04 }, 297 { 0x8e, 0x00 }, 298 { REG_COM12, 0x77 }, /* HREF option, UV average */ 299 { 0x8b, 0x06 }, 300 { 0x35, 0x91 }, 301 { 0x94, 0x88 }, 302 { 0x95, 0x88 }, 303 { REG_COM15, 0xc1 }, /* Output range, RGB 555/565 */ 304 { REG_GRCOM, 0x2f }, /* Analog BLC & regulator */ 305 { REG_COM6, 0x43 }, /* HREF & ADBLC options */ 306 { REG_COM8, 0xe5 }, /* AGC/AEC options */ 307 { REG_COM13, 0x90 }, /* Gamma selection, colour matrix, UV delay */ 308 { REG_HV, 0x80 }, /* Manual banding filter MSB */ 309 { 0x5c, 0x96 }, /* Reserved up to 0xa5 */ 310 { 0x5d, 0x96 }, 311 { 0x5e, 0x10 }, 312 { 0x59, 0xeb }, 313 { 0x5a, 0x9c }, 314 { 0x5b, 0x55 }, 315 { 0x43, 0xf0 }, 316 { 0x44, 0x10 }, 317 { 0x45, 0x55 }, 318 { 0x46, 0x86 }, 319 { 0x47, 0x64 }, 320 { 0x48, 0x86 }, 321 { 0x5f, 0xe0 }, 322 { 0x60, 0x8c }, 323 { 0x61, 0x20 }, 324 { 0xa5, 0xd9 }, 325 { 0xa4, 0x74 }, /* reserved */ 326 { REG_COM23, 0x02 }, /* Color gain analog/_digital_ */ 327 { REG_COM8, 0xe7 }, /* Enable AEC, AWB, AEC */ 328 { REG_COM22, 0x23 }, /* Edge enhancement, denoising */ 329 { 0xa9, 0xb8 }, 330 { 0xaa, 0x92 }, 331 { 0xab, 0x0a }, 332 { REG_DBLC1, 0xdf }, /* Digital BLC */ 333 { REG_DBLC_B, 0x00 }, /* Digital BLC B chan offset */ 334 { REG_DBLC_R, 0x00 }, /* Digital BLC R chan offset */ 335 { REG_DBLC_GB, 0x00 }, /* Digital BLC GB chan offset */ 336 { REG_DBLC_GR, 0x00 }, 337 { REG_COM9, 0x3a }, /* Gain ceiling 16x */ 338 { REG_NULL, 0 } 339}; 340 341#define NUM_FMT_REGS 14 342/* 343 * COM7, COM3, COM4, HSTART, HSTOP, HREF, VSTART, VSTOP, VREF, 344 * EXHCH, EXHCL, ADC, OCOM, OFON 345 */ 346static const u8 frame_size_reg_addr[NUM_FMT_REGS] = { 347 0x12, 0x0c, 0x0d, 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03, 348 0x2a, 0x2b, 0x37, 0x38, 0x39, 349}; 350 351static const u8 ov965x_sxga_regs[NUM_FMT_REGS] = { 352 0x00, 0x00, 0x00, 0x1e, 0xbe, 0xbf, 0x01, 0x81, 0x12, 353 0x10, 0x34, 0x81, 0x93, 0x51, 354}; 355 356static const u8 ov965x_vga_regs[NUM_FMT_REGS] = { 357 0x40, 0x04, 0x80, 0x26, 0xc6, 0xed, 0x01, 0x3d, 0x00, 358 0x10, 0x40, 0x91, 0x12, 0x43, 359}; 360 361/* Determined empirically. */ 362static const u8 ov965x_qvga_regs[NUM_FMT_REGS] = { 363 0x10, 0x04, 0x80, 0x25, 0xc5, 0xbf, 0x00, 0x80, 0x12, 364 0x10, 0x40, 0x91, 0x12, 0x43, 365}; 366 367static const struct ov965x_framesize ov965x_framesizes[] = { 368 { 369 .width = SXGA_WIDTH, 370 .height = SXGA_HEIGHT, 371 .regs = ov965x_sxga_regs, 372 .max_exp_lines = 1048, 373 }, { 374 .width = VGA_WIDTH, 375 .height = VGA_HEIGHT, 376 .regs = ov965x_vga_regs, 377 .max_exp_lines = 498, 378 }, { 379 .width = QVGA_WIDTH, 380 .height = QVGA_HEIGHT, 381 .regs = ov965x_qvga_regs, 382 .max_exp_lines = 248, 383 }, 384}; 385 386struct ov965x_pixfmt { 387 u32 code; 388 u32 colorspace; 389 /* REG_TSLB value, only bits [3:2] may be set. */ 390 u8 tslb_reg; 391}; 392 393static const struct ov965x_pixfmt ov965x_formats[] = { 394 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG, 0x00}, 395 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG, 0x04}, 396 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG, 0x0c}, 397 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 0x08}, 398}; 399 400/* 401 * This table specifies possible frame resolution and interval 402 * combinations. Default CLKRC[5:0] divider values are valid 403 * only for 24 MHz external clock frequency. 404 */ 405static struct ov965x_interval ov965x_intervals[] = { 406 {{ 100, 625 }, { SXGA_WIDTH, SXGA_HEIGHT }, 0 }, /* 6.25 fps */ 407 {{ 10, 125 }, { VGA_WIDTH, VGA_HEIGHT }, 1 }, /* 12.5 fps */ 408 {{ 10, 125 }, { QVGA_WIDTH, QVGA_HEIGHT }, 3 }, /* 12.5 fps */ 409 {{ 1, 25 }, { VGA_WIDTH, VGA_HEIGHT }, 0 }, /* 25 fps */ 410 {{ 1, 25 }, { QVGA_WIDTH, QVGA_HEIGHT }, 1 }, /* 25 fps */ 411}; 412 413static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) 414{ 415 return &container_of(ctrl->handler, struct ov965x, ctrls.handler)->sd; 416} 417 418static inline struct ov965x *to_ov965x(struct v4l2_subdev *sd) 419{ 420 return container_of(sd, struct ov965x, sd); 421} 422 423static int ov965x_read(struct ov965x *ov965x, u8 addr, u8 *val) 424{ 425 int ret; 426 unsigned int buf; 427 428 ret = regmap_read(ov965x->regmap, addr, &buf); 429 if (!ret) 430 *val = buf; 431 else 432 *val = -1; 433 434 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02x. (%d)\n", 435 __func__, *val, addr, ret); 436 437 return ret; 438} 439 440static int ov965x_write(struct ov965x *ov965x, u8 addr, u8 val) 441{ 442 int ret; 443 444 ret = regmap_write(ov965x->regmap, addr, val); 445 446 v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02X (%d)\n", 447 __func__, val, addr, ret); 448 449 return ret; 450} 451 452static int ov965x_write_array(struct ov965x *ov965x, 453 const struct i2c_rv *regs) 454{ 455 int i, ret = 0; 456 457 for (i = 0; ret == 0 && regs[i].addr != REG_NULL; i++) 458 ret = ov965x_write(ov965x, regs[i].addr, regs[i].value); 459 460 return ret; 461} 462 463static int ov965x_set_default_gamma_curve(struct ov965x *ov965x) 464{ 465 static const u8 gamma_curve[] = { 466 /* Values taken from OV application note. */ 467 0x40, 0x30, 0x4b, 0x60, 0x70, 0x70, 0x70, 0x70, 468 0x60, 0x60, 0x50, 0x48, 0x3a, 0x2e, 0x28, 0x22, 469 0x04, 0x07, 0x10, 0x28, 0x36, 0x44, 0x52, 0x60, 470 0x6c, 0x78, 0x8c, 0x9e, 0xbb, 0xd2, 0xe6 471 }; 472 u8 addr = REG_GSP; 473 unsigned int i; 474 475 for (i = 0; i < ARRAY_SIZE(gamma_curve); i++) { 476 int ret = ov965x_write(ov965x, addr, gamma_curve[i]); 477 478 if (ret < 0) 479 return ret; 480 addr++; 481 } 482 483 return 0; 484}; 485 486static int ov965x_set_color_matrix(struct ov965x *ov965x) 487{ 488 static const u8 mtx[] = { 489 /* MTX1..MTX9, MTXS */ 490 0x3a, 0x3d, 0x03, 0x12, 0x26, 0x38, 0x40, 0x40, 0x40, 0x0d 491 }; 492 u8 addr = REG_MTX(1); 493 unsigned int i; 494 495 for (i = 0; i < ARRAY_SIZE(mtx); i++) { 496 int ret = ov965x_write(ov965x, addr, mtx[i]); 497 498 if (ret < 0) 499 return ret; 500 addr++; 501 } 502 503 return 0; 504} 505 506static int __ov965x_set_power(struct ov965x *ov965x, int on) 507{ 508 if (on) { 509 int ret = clk_prepare_enable(ov965x->clk); 510 511 if (ret) 512 return ret; 513 514 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 0); 515 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 0); 516 msleep(25); 517 } else { 518 gpiod_set_value_cansleep(ov965x->gpios[GPIO_RST], 1); 519 gpiod_set_value_cansleep(ov965x->gpios[GPIO_PWDN], 1); 520 521 clk_disable_unprepare(ov965x->clk); 522 } 523 524 ov965x->streaming = 0; 525 526 return 0; 527} 528 529static int ov965x_s_power(struct v4l2_subdev *sd, int on) 530{ 531 struct ov965x *ov965x = to_ov965x(sd); 532 int ret = 0; 533 534 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on); 535 536 mutex_lock(&ov965x->lock); 537 if (ov965x->power == !on) { 538 ret = __ov965x_set_power(ov965x, on); 539 if (!ret && on) { 540 ret = ov965x_write_array(ov965x, 541 ov965x_init_regs); 542 ov965x->apply_frame_fmt = 1; 543 ov965x->ctrls.update = 1; 544 } 545 } 546 if (!ret) 547 ov965x->power += on ? 1 : -1; 548 549 WARN_ON(ov965x->power < 0); 550 mutex_unlock(&ov965x->lock); 551 return ret; 552} 553 554/* 555 * V4L2 controls 556 */ 557 558static void ov965x_update_exposure_ctrl(struct ov965x *ov965x) 559{ 560 struct v4l2_ctrl *ctrl = ov965x->ctrls.exposure; 561 unsigned long fint, trow; 562 int min, max, def; 563 u8 clkrc; 564 565 mutex_lock(&ov965x->lock); 566 if (WARN_ON(!ctrl || !ov965x->frame_size)) { 567 mutex_unlock(&ov965x->lock); 568 return; 569 } 570 clkrc = DEF_CLKRC + ov965x->fiv->clkrc_div; 571 /* Calculate internal clock frequency */ 572 fint = ov965x->mclk_frequency * ((clkrc >> 7) + 1) / 573 ((2 * ((clkrc & 0x3f) + 1))); 574 /* and the row interval (in us). */ 575 trow = (2 * 1520 * 1000000UL) / fint; 576 max = ov965x->frame_size->max_exp_lines * trow; 577 ov965x->exp_row_interval = trow; 578 mutex_unlock(&ov965x->lock); 579 580 v4l2_dbg(1, debug, &ov965x->sd, "clkrc: %#x, fi: %lu, tr: %lu, %d\n", 581 clkrc, fint, trow, max); 582 583 /* Update exposure time range to match current frame format. */ 584 min = (trow + 100) / 100; 585 max = (max - 100) / 100; 586 def = min + (max - min) / 2; 587 588 if (v4l2_ctrl_modify_range(ctrl, min, max, 1, def)) 589 v4l2_err(&ov965x->sd, "Exposure ctrl range update failed\n"); 590} 591 592static int ov965x_set_banding_filter(struct ov965x *ov965x, int value) 593{ 594 unsigned long mbd, light_freq; 595 int ret; 596 u8 reg; 597 598 ret = ov965x_read(ov965x, REG_COM8, ®); 599 if (!ret) { 600 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) 601 reg &= ~COM8_BFILT; 602 else 603 reg |= COM8_BFILT; 604 ret = ov965x_write(ov965x, REG_COM8, reg); 605 } 606 if (value == V4L2_CID_POWER_LINE_FREQUENCY_DISABLED) 607 return 0; 608 if (WARN_ON(!ov965x->fiv)) 609 return -EINVAL; 610 /* Set minimal exposure time for 50/60 HZ lighting */ 611 if (value == V4L2_CID_POWER_LINE_FREQUENCY_50HZ) 612 light_freq = 50; 613 else 614 light_freq = 60; 615 mbd = (1000UL * ov965x->fiv->interval.denominator * 616 ov965x->frame_size->max_exp_lines) / 617 ov965x->fiv->interval.numerator; 618 mbd = ((mbd / (light_freq * 2)) + 500) / 1000UL; 619 620 return ov965x_write(ov965x, REG_MBD, mbd); 621} 622 623static int ov965x_set_white_balance(struct ov965x *ov965x, int awb) 624{ 625 int ret; 626 u8 reg; 627 628 ret = ov965x_read(ov965x, REG_COM8, ®); 629 if (!ret) { 630 reg = awb ? reg | REG_COM8 : reg & ~REG_COM8; 631 ret = ov965x_write(ov965x, REG_COM8, reg); 632 } 633 if (!ret && !awb) { 634 ret = ov965x_write(ov965x, REG_BLUE, 635 ov965x->ctrls.blue_balance->val); 636 if (ret < 0) 637 return ret; 638 ret = ov965x_write(ov965x, REG_RED, 639 ov965x->ctrls.red_balance->val); 640 } 641 return ret; 642} 643 644#define NUM_BR_LEVELS 7 645#define NUM_BR_REGS 3 646 647static int ov965x_set_brightness(struct ov965x *ov965x, int val) 648{ 649 static const u8 regs[NUM_BR_LEVELS + 1][NUM_BR_REGS] = { 650 { REG_AEW, REG_AEB, REG_VPT }, 651 { 0x1c, 0x12, 0x50 }, /* -3 */ 652 { 0x3d, 0x30, 0x71 }, /* -2 */ 653 { 0x50, 0x44, 0x92 }, /* -1 */ 654 { 0x70, 0x64, 0xc3 }, /* 0 */ 655 { 0x90, 0x84, 0xd4 }, /* +1 */ 656 { 0xc4, 0xbf, 0xf9 }, /* +2 */ 657 { 0xd8, 0xd0, 0xfa }, /* +3 */ 658 }; 659 int i, ret = 0; 660 661 val += (NUM_BR_LEVELS / 2 + 1); 662 if (val > NUM_BR_LEVELS) 663 return -EINVAL; 664 665 for (i = 0; i < NUM_BR_REGS && !ret; i++) 666 ret = ov965x_write(ov965x, regs[0][i], 667 regs[val][i]); 668 return ret; 669} 670 671static int ov965x_set_gain(struct ov965x *ov965x, int auto_gain) 672{ 673 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 674 int ret = 0; 675 u8 reg; 676 /* 677 * For manual mode we need to disable AGC first, so 678 * gain value in REG_VREF, REG_GAIN is not overwritten. 679 */ 680 if (ctrls->auto_gain->is_new) { 681 ret = ov965x_read(ov965x, REG_COM8, ®); 682 if (ret < 0) 683 return ret; 684 if (ctrls->auto_gain->val) 685 reg |= COM8_AGC; 686 else 687 reg &= ~COM8_AGC; 688 ret = ov965x_write(ov965x, REG_COM8, reg); 689 if (ret < 0) 690 return ret; 691 } 692 693 if (ctrls->gain->is_new && !auto_gain) { 694 unsigned int gain = ctrls->gain->val; 695 unsigned int rgain; 696 int m; 697 /* 698 * Convert gain control value to the sensor's gain 699 * registers (VREF[7:6], GAIN[7:0]) format. 700 */ 701 for (m = 6; m >= 0; m--) 702 if (gain >= (1 << m) * 16) 703 break; 704 705 /* Sanity check: don't adjust the gain with a negative value */ 706 if (m < 0) 707 return -EINVAL; 708 709 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 730static 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 759static 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 804static 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 820static 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 843static 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 855static 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 901static 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 915static 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 976static const struct v4l2_ctrl_ops ov965x_ctrl_ops = { 977 .g_volatile_ctrl = ov965x_g_volatile_ctrl, 978 .s_ctrl = ov965x_s_ctrl, 979}; 980 981static const char * const test_pattern_menu[] = { 982 "Disabled", 983 "Color bars", 984}; 985 986static 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 */ 1061static 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 1070static int ov965x_enum_mbus_code(struct v4l2_subdev *sd, 1071 struct v4l2_subdev_state *sd_state, 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 1081static int ov965x_enum_frame_sizes(struct v4l2_subdev *sd, 1082 struct v4l2_subdev_state *sd_state, 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 1104static int ov965x_get_frame_interval(struct v4l2_subdev *sd, 1105 struct v4l2_subdev_state *sd_state, 1106 struct v4l2_subdev_frame_interval *fi) 1107{ 1108 struct ov965x *ov965x = to_ov965x(sd); 1109 1110 /* 1111 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1112 * subdev active state API. 1113 */ 1114 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1115 return -EINVAL; 1116 1117 mutex_lock(&ov965x->lock); 1118 fi->interval = ov965x->fiv->interval; 1119 mutex_unlock(&ov965x->lock); 1120 1121 return 0; 1122} 1123 1124static int __ov965x_set_frame_interval(struct ov965x *ov965x, 1125 struct v4l2_subdev_frame_interval *fi) 1126{ 1127 struct v4l2_mbus_framefmt *mbus_fmt = &ov965x->format; 1128 const struct ov965x_interval *fiv = &ov965x_intervals[0]; 1129 u64 req_int, err, min_err = ~0ULL; 1130 unsigned int i; 1131 1132 if (fi->interval.denominator == 0) 1133 return -EINVAL; 1134 1135 req_int = (u64)fi->interval.numerator * 10000; 1136 do_div(req_int, fi->interval.denominator); 1137 1138 for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) { 1139 const struct ov965x_interval *iv = &ov965x_intervals[i]; 1140 1141 if (mbus_fmt->width != iv->size.width || 1142 mbus_fmt->height != iv->size.height) 1143 continue; 1144 err = abs((u64)(iv->interval.numerator * 10000) / 1145 iv->interval.denominator - req_int); 1146 if (err < min_err) { 1147 fiv = iv; 1148 min_err = err; 1149 } 1150 } 1151 ov965x->fiv = fiv; 1152 1153 v4l2_dbg(1, debug, &ov965x->sd, "Changed frame interval to %u us\n", 1154 fiv->interval.numerator * 1000000 / fiv->interval.denominator); 1155 1156 return 0; 1157} 1158 1159static int ov965x_set_frame_interval(struct v4l2_subdev *sd, 1160 struct v4l2_subdev_state *sd_state, 1161 struct v4l2_subdev_frame_interval *fi) 1162{ 1163 struct ov965x *ov965x = to_ov965x(sd); 1164 int ret; 1165 1166 /* 1167 * FIXME: Implement support for V4L2_SUBDEV_FORMAT_TRY, using the V4L2 1168 * subdev active state API. 1169 */ 1170 if (fi->which != V4L2_SUBDEV_FORMAT_ACTIVE) 1171 return -EINVAL; 1172 1173 v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n", 1174 fi->interval.numerator, fi->interval.denominator); 1175 1176 mutex_lock(&ov965x->lock); 1177 ret = __ov965x_set_frame_interval(ov965x, fi); 1178 ov965x->apply_frame_fmt = 1; 1179 mutex_unlock(&ov965x->lock); 1180 return ret; 1181} 1182 1183static int ov965x_get_fmt(struct v4l2_subdev *sd, 1184 struct v4l2_subdev_state *sd_state, 1185 struct v4l2_subdev_format *fmt) 1186{ 1187 struct ov965x *ov965x = to_ov965x(sd); 1188 struct v4l2_mbus_framefmt *mf; 1189 1190 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1191 mf = v4l2_subdev_state_get_format(sd_state, 0); 1192 fmt->format = *mf; 1193 return 0; 1194 } 1195 1196 mutex_lock(&ov965x->lock); 1197 fmt->format = ov965x->format; 1198 mutex_unlock(&ov965x->lock); 1199 1200 return 0; 1201} 1202 1203static void __ov965x_try_frame_size(struct v4l2_mbus_framefmt *mf, 1204 const struct ov965x_framesize **size) 1205{ 1206 const struct ov965x_framesize *fsize = &ov965x_framesizes[0], 1207 *match = NULL; 1208 int i = ARRAY_SIZE(ov965x_framesizes); 1209 unsigned int min_err = UINT_MAX; 1210 1211 while (i--) { 1212 int err = abs(fsize->width - mf->width) 1213 + abs(fsize->height - mf->height); 1214 if (err < min_err) { 1215 min_err = err; 1216 match = fsize; 1217 } 1218 fsize++; 1219 } 1220 if (!match) 1221 match = &ov965x_framesizes[0]; 1222 mf->width = match->width; 1223 mf->height = match->height; 1224 if (size) 1225 *size = match; 1226} 1227 1228static int ov965x_set_fmt(struct v4l2_subdev *sd, 1229 struct v4l2_subdev_state *sd_state, 1230 struct v4l2_subdev_format *fmt) 1231{ 1232 unsigned int index = ARRAY_SIZE(ov965x_formats); 1233 struct v4l2_mbus_framefmt *mf = &fmt->format; 1234 struct ov965x *ov965x = to_ov965x(sd); 1235 const struct ov965x_framesize *size = NULL; 1236 int ret = 0; 1237 1238 __ov965x_try_frame_size(mf, &size); 1239 1240 while (--index) 1241 if (ov965x_formats[index].code == mf->code) 1242 break; 1243 1244 mf->colorspace = V4L2_COLORSPACE_JPEG; 1245 mf->code = ov965x_formats[index].code; 1246 mf->field = V4L2_FIELD_NONE; 1247 1248 mutex_lock(&ov965x->lock); 1249 1250 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { 1251 if (sd_state) { 1252 mf = v4l2_subdev_state_get_format(sd_state, fmt->pad); 1253 *mf = fmt->format; 1254 } 1255 } else { 1256 if (ov965x->streaming) { 1257 ret = -EBUSY; 1258 } else { 1259 ov965x->frame_size = size; 1260 ov965x->format = fmt->format; 1261 ov965x->tslb_reg = ov965x_formats[index].tslb_reg; 1262 ov965x->apply_frame_fmt = 1; 1263 } 1264 } 1265 1266 if (!ret && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) { 1267 struct v4l2_subdev_frame_interval fiv = { 1268 .interval = { 0, 1 } 1269 }; 1270 /* Reset to minimum possible frame interval */ 1271 __ov965x_set_frame_interval(ov965x, &fiv); 1272 } 1273 mutex_unlock(&ov965x->lock); 1274 1275 if (!ret) 1276 ov965x_update_exposure_ctrl(ov965x); 1277 1278 return ret; 1279} 1280 1281static int ov965x_set_frame_size(struct ov965x *ov965x) 1282{ 1283 int i, ret = 0; 1284 1285 for (i = 0; ret == 0 && i < NUM_FMT_REGS; i++) 1286 ret = ov965x_write(ov965x, frame_size_reg_addr[i], 1287 ov965x->frame_size->regs[i]); 1288 return ret; 1289} 1290 1291static int __ov965x_set_params(struct ov965x *ov965x) 1292{ 1293 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 1294 int ret = 0; 1295 u8 reg; 1296 1297 if (ov965x->apply_frame_fmt) { 1298 reg = DEF_CLKRC + ov965x->fiv->clkrc_div; 1299 ret = ov965x_write(ov965x, REG_CLKRC, reg); 1300 if (ret < 0) 1301 return ret; 1302 ret = ov965x_set_frame_size(ov965x); 1303 if (ret < 0) 1304 return ret; 1305 ret = ov965x_read(ov965x, REG_TSLB, ®); 1306 if (ret < 0) 1307 return ret; 1308 reg &= ~TSLB_YUYV_MASK; 1309 reg |= ov965x->tslb_reg; 1310 ret = ov965x_write(ov965x, REG_TSLB, reg); 1311 if (ret < 0) 1312 return ret; 1313 } 1314 ret = ov965x_set_default_gamma_curve(ov965x); 1315 if (ret < 0) 1316 return ret; 1317 ret = ov965x_set_color_matrix(ov965x); 1318 if (ret < 0) 1319 return ret; 1320 /* 1321 * Select manual banding filter, the filter will 1322 * be enabled further if required. 1323 */ 1324 ret = ov965x_read(ov965x, REG_COM11, ®); 1325 if (!ret) 1326 reg |= COM11_BANDING; 1327 ret = ov965x_write(ov965x, REG_COM11, reg); 1328 if (ret < 0) 1329 return ret; 1330 /* 1331 * Banding filter (REG_MBD value) needs to match selected 1332 * resolution and frame rate, so it's always updated here. 1333 */ 1334 return ov965x_set_banding_filter(ov965x, ctrls->light_freq->val); 1335} 1336 1337static int ov965x_s_stream(struct v4l2_subdev *sd, int on) 1338{ 1339 struct ov965x *ov965x = to_ov965x(sd); 1340 struct ov965x_ctrls *ctrls = &ov965x->ctrls; 1341 int ret = 0; 1342 1343 v4l2_dbg(1, debug, sd, "%s: on: %d\n", __func__, on); 1344 1345 mutex_lock(&ov965x->lock); 1346 if (ov965x->streaming == !on) { 1347 if (on) 1348 ret = __ov965x_set_params(ov965x); 1349 1350 if (!ret && ctrls->update) { 1351 /* 1352 * ov965x_s_ctrl callback takes the mutex 1353 * so it needs to be released here. 1354 */ 1355 mutex_unlock(&ov965x->lock); 1356 ret = v4l2_ctrl_handler_setup(&ctrls->handler); 1357 1358 mutex_lock(&ov965x->lock); 1359 if (!ret) 1360 ctrls->update = 0; 1361 } 1362 if (!ret) 1363 ret = ov965x_write(ov965x, REG_COM2, 1364 on ? 0x01 : 0x11); 1365 } 1366 if (!ret) 1367 ov965x->streaming += on ? 1 : -1; 1368 1369 WARN_ON(ov965x->streaming < 0); 1370 mutex_unlock(&ov965x->lock); 1371 1372 return ret; 1373} 1374 1375/* 1376 * V4L2 subdev internal operations 1377 */ 1378static int ov965x_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) 1379{ 1380 struct v4l2_mbus_framefmt *mf = 1381 v4l2_subdev_state_get_format(fh->state, 0); 1382 1383 ov965x_get_default_format(mf); 1384 return 0; 1385} 1386 1387static const struct v4l2_subdev_pad_ops ov965x_pad_ops = { 1388 .enum_mbus_code = ov965x_enum_mbus_code, 1389 .enum_frame_size = ov965x_enum_frame_sizes, 1390 .get_fmt = ov965x_get_fmt, 1391 .set_fmt = ov965x_set_fmt, 1392 .get_frame_interval = ov965x_get_frame_interval, 1393 .set_frame_interval = ov965x_set_frame_interval, 1394}; 1395 1396static const struct v4l2_subdev_video_ops ov965x_video_ops = { 1397 .s_stream = ov965x_s_stream, 1398 1399}; 1400 1401static const struct v4l2_subdev_internal_ops ov965x_sd_internal_ops = { 1402 .open = ov965x_open, 1403}; 1404 1405static const struct v4l2_subdev_core_ops ov965x_core_ops = { 1406 .s_power = ov965x_s_power, 1407 .log_status = v4l2_ctrl_subdev_log_status, 1408 .subscribe_event = v4l2_ctrl_subdev_subscribe_event, 1409 .unsubscribe_event = v4l2_event_subdev_unsubscribe, 1410}; 1411 1412static const struct v4l2_subdev_ops ov965x_subdev_ops = { 1413 .core = &ov965x_core_ops, 1414 .pad = &ov965x_pad_ops, 1415 .video = &ov965x_video_ops, 1416}; 1417 1418static int ov965x_configure_gpios(struct ov965x *ov965x) 1419{ 1420 struct device *dev = regmap_get_device(ov965x->regmap); 1421 1422 ov965x->gpios[GPIO_PWDN] = devm_gpiod_get_optional(dev, "powerdown", 1423 GPIOD_OUT_HIGH); 1424 if (IS_ERR(ov965x->gpios[GPIO_PWDN])) { 1425 dev_info(dev, "can't get %s GPIO\n", "powerdown"); 1426 return PTR_ERR(ov965x->gpios[GPIO_PWDN]); 1427 } 1428 1429 ov965x->gpios[GPIO_RST] = devm_gpiod_get_optional(dev, "reset", 1430 GPIOD_OUT_HIGH); 1431 if (IS_ERR(ov965x->gpios[GPIO_RST])) { 1432 dev_info(dev, "can't get %s GPIO\n", "reset"); 1433 return PTR_ERR(ov965x->gpios[GPIO_RST]); 1434 } 1435 1436 return 0; 1437} 1438 1439static int ov965x_detect_sensor(struct v4l2_subdev *sd) 1440{ 1441 struct ov965x *ov965x = to_ov965x(sd); 1442 u8 pid, ver; 1443 int ret; 1444 1445 mutex_lock(&ov965x->lock); 1446 ret = __ov965x_set_power(ov965x, 1); 1447 if (ret) 1448 goto out; 1449 1450 msleep(25); 1451 1452 /* Check sensor revision */ 1453 ret = ov965x_read(ov965x, REG_PID, &pid); 1454 if (!ret) 1455 ret = ov965x_read(ov965x, REG_VER, &ver); 1456 1457 __ov965x_set_power(ov965x, 0); 1458 1459 if (!ret) { 1460 ov965x->id = OV965X_ID(pid, ver); 1461 if (ov965x->id == OV9650_ID || ov965x->id == OV9652_ID) { 1462 v4l2_info(sd, "Found OV%04X sensor\n", ov965x->id); 1463 } else { 1464 v4l2_err(sd, "Sensor detection failed (%04X)\n", 1465 ov965x->id); 1466 ret = -ENODEV; 1467 } 1468 } 1469out: 1470 mutex_unlock(&ov965x->lock); 1471 1472 return ret; 1473} 1474 1475static int ov965x_probe(struct i2c_client *client) 1476{ 1477 struct v4l2_subdev *sd; 1478 struct ov965x *ov965x; 1479 int ret; 1480 static const struct regmap_config ov965x_regmap_config = { 1481 .reg_bits = 8, 1482 .val_bits = 8, 1483 .max_register = 0xab, 1484 }; 1485 1486 ov965x = devm_kzalloc(&client->dev, sizeof(*ov965x), GFP_KERNEL); 1487 if (!ov965x) 1488 return -ENOMEM; 1489 1490 ov965x->regmap = devm_regmap_init_sccb(client, &ov965x_regmap_config); 1491 if (IS_ERR(ov965x->regmap)) { 1492 dev_err(&client->dev, "Failed to allocate register map\n"); 1493 return PTR_ERR(ov965x->regmap); 1494 } 1495 1496 if (dev_fwnode(&client->dev)) { 1497 ov965x->clk = devm_clk_get(&client->dev, NULL); 1498 if (IS_ERR(ov965x->clk)) 1499 return PTR_ERR(ov965x->clk); 1500 ov965x->mclk_frequency = clk_get_rate(ov965x->clk); 1501 1502 ret = ov965x_configure_gpios(ov965x); 1503 if (ret < 0) 1504 return ret; 1505 } else { 1506 dev_err(&client->dev, 1507 "No device properties specified\n"); 1508 1509 return -EINVAL; 1510 } 1511 1512 mutex_init(&ov965x->lock); 1513 1514 sd = &ov965x->sd; 1515 v4l2_i2c_subdev_init(sd, client, &ov965x_subdev_ops); 1516 strscpy(sd->name, DRIVER_NAME, sizeof(sd->name)); 1517 1518 sd->internal_ops = &ov965x_sd_internal_ops; 1519 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | 1520 V4L2_SUBDEV_FL_HAS_EVENTS; 1521 1522 ov965x->pad.flags = MEDIA_PAD_FL_SOURCE; 1523 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; 1524 ret = media_entity_pads_init(&sd->entity, 1, &ov965x->pad); 1525 if (ret < 0) 1526 goto err_mutex; 1527 1528 ret = ov965x_initialize_controls(ov965x); 1529 if (ret < 0) 1530 goto err_me; 1531 1532 ov965x_get_default_format(&ov965x->format); 1533 ov965x->frame_size = &ov965x_framesizes[0]; 1534 ov965x->fiv = &ov965x_intervals[0]; 1535 1536 ret = ov965x_detect_sensor(sd); 1537 if (ret < 0) 1538 goto err_ctrls; 1539 1540 /* Update exposure time min/max to match frame format */ 1541 ov965x_update_exposure_ctrl(ov965x); 1542 1543 ret = v4l2_async_register_subdev(sd); 1544 if (ret < 0) 1545 goto err_ctrls; 1546 1547 return 0; 1548err_ctrls: 1549 v4l2_ctrl_handler_free(sd->ctrl_handler); 1550err_me: 1551 media_entity_cleanup(&sd->entity); 1552err_mutex: 1553 mutex_destroy(&ov965x->lock); 1554 return ret; 1555} 1556 1557static void ov965x_remove(struct i2c_client *client) 1558{ 1559 struct v4l2_subdev *sd = i2c_get_clientdata(client); 1560 struct ov965x *ov965x = to_ov965x(sd); 1561 1562 v4l2_async_unregister_subdev(sd); 1563 v4l2_ctrl_handler_free(sd->ctrl_handler); 1564 media_entity_cleanup(&sd->entity); 1565 mutex_destroy(&ov965x->lock); 1566} 1567 1568static const struct i2c_device_id ov965x_id[] = { 1569 { "OV9650", 0 }, 1570 { "OV9652", 0 }, 1571 { /* sentinel */ } 1572}; 1573MODULE_DEVICE_TABLE(i2c, ov965x_id); 1574 1575#if IS_ENABLED(CONFIG_OF) 1576static const struct of_device_id ov965x_of_match[] = { 1577 { .compatible = "ovti,ov9650", }, 1578 { .compatible = "ovti,ov9652", }, 1579 { /* sentinel */ } 1580}; 1581MODULE_DEVICE_TABLE(of, ov965x_of_match); 1582#endif 1583 1584static struct i2c_driver ov965x_i2c_driver = { 1585 .driver = { 1586 .name = DRIVER_NAME, 1587 .of_match_table = of_match_ptr(ov965x_of_match), 1588 }, 1589 .probe = ov965x_probe, 1590 .remove = ov965x_remove, 1591 .id_table = ov965x_id, 1592}; 1593 1594module_i2c_driver(ov965x_i2c_driver); 1595 1596MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>"); 1597MODULE_DESCRIPTION("OV9650/OV9652 CMOS Image Sensor driver"); 1598MODULE_LICENSE("GPL"); 1599