drivers/media/i2c/adv7183.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * adv7183.c Analog Devices ADV7183 video decoder driver
   4  *
   5  * Copyright (c) 2011 Analog Devices Inc.
   6  */
   7
   8 #include <linux/delay.h>
   9 #include <linux/errno.h>
  10 #include <linux/gpio/consumer.h>
  11 #include <linux/i2c.h>
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/slab.h>
  15 #include <linux/types.h>
  16 #include <linux/videodev2.h>
  17
  18 #include <media/i2c/adv7183.h>
  19 #include <media/v4l2-ctrls.h>
  20 #include <media/v4l2-device.h>
  21
  22 #include "adv7183_regs.h"
  23
  24 struct adv7183 {
  25         struct v4l2_subdev sd;
  26         struct v4l2_ctrl_handler hdl;
  27
  28         v4l2_std_id std; /* Current set standard */
  29         u32 input;
  30         u32 output;
  31         struct gpio_desc *reset_pin;
  32         struct gpio_desc *oe_pin;
  33         struct v4l2_mbus_framefmt fmt;
  34 };
  35
  36 /* EXAMPLES USING 27 MHz CLOCK
  37  * Mode 1 CVBS Input (Composite Video on AIN5)
  38  * All standards are supported through autodetect, 8-bit, 4:2:2, ITU-R BT.656 output on P15 to P8.
  39  */
  40 static const unsigned char adv7183_init_regs[] = {
  41         ADV7183_IN_CTRL, 0x04,           /* CVBS input on AIN5 */
  42         ADV7183_DIGI_CLAMP_CTRL_1, 0x00, /* Slow down digital clamps */
  43         ADV7183_SHAP_FILT_CTRL, 0x41,    /* Set CSFM to SH1 */
  44         ADV7183_ADC_CTRL, 0x16,          /* Power down ADC 1 and ADC 2 */
  45         ADV7183_CTI_DNR_CTRL_4, 0x04,    /* Set DNR threshold to 4 for flat response */
  46         /* ADI recommended programming sequence */
  47         ADV7183_ADI_CTRL, 0x80,
  48         ADV7183_CTI_DNR_CTRL_4, 0x20,
  49         0x52, 0x18,
  50         0x58, 0xED,
  51         0x77, 0xC5,
  52         0x7C, 0x93,
  53         0x7D, 0x00,
  54         0xD0, 0x48,
  55         0xD5, 0xA0,
  56         0xD7, 0xEA,
  57         ADV7183_SD_SATURATION_CR, 0x3E,
  58         ADV7183_PAL_V_END, 0x3E,
  59         ADV7183_PAL_F_TOGGLE, 0x0F,
  60         ADV7183_ADI_CTRL, 0x00,
  61 };
  62
  63 static inline struct adv7183 *to_adv7183(struct v4l2_subdev *sd)
  64 {
  65         return container_of(sd, struct adv7183, sd);
  66 }
  67 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
  68 {
  69         return &container_of(ctrl->handler, struct adv7183, hdl)->sd;
  70 }
  71
  72 static inline int adv7183_read(struct v4l2_subdev *sd, unsigned char reg)
  73 {
  74         struct i2c_client *client = v4l2_get_subdevdata(sd);
  75
  76         return i2c_smbus_read_byte_data(client, reg);
  77 }
  78
  79 static inline int adv7183_write(struct v4l2_subdev *sd, unsigned char reg,
  80                                 unsigned char value)
  81 {
  82         struct i2c_client *client = v4l2_get_subdevdata(sd);
  83
  84         return i2c_smbus_write_byte_data(client, reg, value);
  85 }
  86
  87 static int adv7183_writeregs(struct v4l2_subdev *sd,
  88                 const unsigned char *regs, unsigned int num)
  89 {
  90         unsigned char reg, data;
  91         unsigned int cnt = 0;
  92
  93         if (num & 0x1) {
  94                 v4l2_err(sd, "invalid regs array\n");
  95                 return -1;
  96         }
  97
  98         while (cnt < num) {
  99                 reg = *regs++;
 100                 data = *regs++;
 101                 cnt += 2;
 102
 103                 adv7183_write(sd, reg, data);
 104         }
 105         return 0;
 106 }
 107
 108 static int adv7183_log_status(struct v4l2_subdev *sd)
 109 {
 110         struct adv7183 *decoder = to_adv7183(sd);
 111
 112         v4l2_info(sd, "adv7183: Input control = 0x%02x\n",
 113                         adv7183_read(sd, ADV7183_IN_CTRL));
 114         v4l2_info(sd, "adv7183: Video selection = 0x%02x\n",
 115                         adv7183_read(sd, ADV7183_VD_SEL));
 116         v4l2_info(sd, "adv7183: Output control = 0x%02x\n",
 117                         adv7183_read(sd, ADV7183_OUT_CTRL));
 118         v4l2_info(sd, "adv7183: Extended output control = 0x%02x\n",
 119                         adv7183_read(sd, ADV7183_EXT_OUT_CTRL));
 120         v4l2_info(sd, "adv7183: Autodetect enable = 0x%02x\n",
 121                         adv7183_read(sd, ADV7183_AUTO_DET_EN));
 122         v4l2_info(sd, "adv7183: Contrast = 0x%02x\n",
 123                         adv7183_read(sd, ADV7183_CONTRAST));
 124         v4l2_info(sd, "adv7183: Brightness = 0x%02x\n",
 125                         adv7183_read(sd, ADV7183_BRIGHTNESS));
 126         v4l2_info(sd, "adv7183: Hue = 0x%02x\n",
 127                         adv7183_read(sd, ADV7183_HUE));
 128         v4l2_info(sd, "adv7183: Default value Y = 0x%02x\n",
 129                         adv7183_read(sd, ADV7183_DEF_Y));
 130         v4l2_info(sd, "adv7183: Default value C = 0x%02x\n",
 131                         adv7183_read(sd, ADV7183_DEF_C));
 132         v4l2_info(sd, "adv7183: ADI control = 0x%02x\n",
 133                         adv7183_read(sd, ADV7183_ADI_CTRL));
 134         v4l2_info(sd, "adv7183: Power Management = 0x%02x\n",
 135                         adv7183_read(sd, ADV7183_POW_MANAGE));
 136         v4l2_info(sd, "adv7183: Status 1 2 and 3 = 0x%02x 0x%02x 0x%02x\n",
 137                         adv7183_read(sd, ADV7183_STATUS_1),
 138                         adv7183_read(sd, ADV7183_STATUS_2),
 139                         adv7183_read(sd, ADV7183_STATUS_3));
 140         v4l2_info(sd, "adv7183: Ident = 0x%02x\n",
 141                         adv7183_read(sd, ADV7183_IDENT));
 142         v4l2_info(sd, "adv7183: Analog clamp control = 0x%02x\n",
 143                         adv7183_read(sd, ADV7183_ANAL_CLAMP_CTRL));
 144         v4l2_info(sd, "adv7183: Digital clamp control 1 = 0x%02x\n",
 145                         adv7183_read(sd, ADV7183_DIGI_CLAMP_CTRL_1));
 146         v4l2_info(sd, "adv7183: Shaping filter control 1 and 2 = 0x%02x 0x%02x\n",
 147                         adv7183_read(sd, ADV7183_SHAP_FILT_CTRL),
 148                         adv7183_read(sd, ADV7183_SHAP_FILT_CTRL_2));
 149         v4l2_info(sd, "adv7183: Comb filter control = 0x%02x\n",
 150                         adv7183_read(sd, ADV7183_COMB_FILT_CTRL));
 151         v4l2_info(sd, "adv7183: ADI control 2 = 0x%02x\n",
 152                         adv7183_read(sd, ADV7183_ADI_CTRL_2));
 153         v4l2_info(sd, "adv7183: Pixel delay control = 0x%02x\n",
 154                         adv7183_read(sd, ADV7183_PIX_DELAY_CTRL));
 155         v4l2_info(sd, "adv7183: Misc gain control = 0x%02x\n",
 156                         adv7183_read(sd, ADV7183_MISC_GAIN_CTRL));
 157         v4l2_info(sd, "adv7183: AGC mode control = 0x%02x\n",
 158                         adv7183_read(sd, ADV7183_AGC_MODE_CTRL));
 159         v4l2_info(sd, "adv7183: Chroma gain control 1 and 2 = 0x%02x 0x%02x\n",
 160                         adv7183_read(sd, ADV7183_CHRO_GAIN_CTRL_1),
 161                         adv7183_read(sd, ADV7183_CHRO_GAIN_CTRL_2));
 162         v4l2_info(sd, "adv7183: Luma gain control 1 and 2 = 0x%02x 0x%02x\n",
 163                         adv7183_read(sd, ADV7183_LUMA_GAIN_CTRL_1),
 164                         adv7183_read(sd, ADV7183_LUMA_GAIN_CTRL_2));
 165         v4l2_info(sd, "adv7183: Vsync field control 1 2 and 3 = 0x%02x 0x%02x 0x%02x\n",
 166                         adv7183_read(sd, ADV7183_VS_FIELD_CTRL_1),
 167                         adv7183_read(sd, ADV7183_VS_FIELD_CTRL_2),
 168                         adv7183_read(sd, ADV7183_VS_FIELD_CTRL_3));
 169         v4l2_info(sd, "adv7183: Hsync position control 1 2 and 3 = 0x%02x 0x%02x 0x%02x\n",
 170                         adv7183_read(sd, ADV7183_HS_POS_CTRL_1),
 171                         adv7183_read(sd, ADV7183_HS_POS_CTRL_2),
 172                         adv7183_read(sd, ADV7183_HS_POS_CTRL_3));
 173         v4l2_info(sd, "adv7183: Polarity = 0x%02x\n",
 174                         adv7183_read(sd, ADV7183_POLARITY));
 175         v4l2_info(sd, "adv7183: ADC control = 0x%02x\n",
 176                         adv7183_read(sd, ADV7183_ADC_CTRL));
 177         v4l2_info(sd, "adv7183: SD offset Cb and Cr = 0x%02x 0x%02x\n",
 178                         adv7183_read(sd, ADV7183_SD_OFFSET_CB),
 179                         adv7183_read(sd, ADV7183_SD_OFFSET_CR));
 180         v4l2_info(sd, "adv7183: SD saturation Cb and Cr = 0x%02x 0x%02x\n",
 181                         adv7183_read(sd, ADV7183_SD_SATURATION_CB),
 182                         adv7183_read(sd, ADV7183_SD_SATURATION_CR));
 183         v4l2_info(sd, "adv7183: Drive strength = 0x%02x\n",
 184                         adv7183_read(sd, ADV7183_DRIVE_STR));
 185         v4l2_ctrl_handler_log_status(&decoder->hdl, sd->name);
 186         return 0;
 187 }
 188
 189 static int adv7183_g_std(struct v4l2_subdev *sd, v4l2_std_id *std)
 190 {
 191         struct adv7183 *decoder = to_adv7183(sd);
 192
 193         *std = decoder->std;
 194         return 0;
 195 }
 196
 197 static int adv7183_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 198 {
 199         struct adv7183 *decoder = to_adv7183(sd);
 200         int reg;
 201
 202         reg = adv7183_read(sd, ADV7183_IN_CTRL) & 0xF;
 203         if (std == V4L2_STD_PAL_60)
 204                 reg |= 0x60;
 205         else if (std == V4L2_STD_NTSC_443)
 206                 reg |= 0x70;
 207         else if (std == V4L2_STD_PAL_N)
 208                 reg |= 0x90;
 209         else if (std == V4L2_STD_PAL_M)
 210                 reg |= 0xA0;
 211         else if (std == V4L2_STD_PAL_Nc)
 212                 reg |= 0xC0;
 213         else if (std & V4L2_STD_PAL)
 214                 reg |= 0x80;
 215         else if (std & V4L2_STD_NTSC)
 216                 reg |= 0x50;
 217         else if (std & V4L2_STD_SECAM)
 218                 reg |= 0xE0;
 219         else
 220                 return -EINVAL;
 221         adv7183_write(sd, ADV7183_IN_CTRL, reg);
 222
 223         decoder->std = std;
 224
 225         return 0;
 226 }
 227
 228 static int adv7183_reset(struct v4l2_subdev *sd, u32 val)
 229 {
 230         int reg;
 231
 232         reg = adv7183_read(sd, ADV7183_POW_MANAGE) | 0x80;
 233         adv7183_write(sd, ADV7183_POW_MANAGE, reg);
 234         /* wait 5ms before any further i2c writes are performed */
 235         usleep_range(5000, 10000);
 236         return 0;
 237 }
 238
 239 static int adv7183_s_routing(struct v4l2_subdev *sd,
 240                                 u32 input, u32 output, u32 config)
 241 {
 242         struct adv7183 *decoder = to_adv7183(sd);
 243         int reg;
 244
 245         if ((input > ADV7183_COMPONENT1) || (output > ADV7183_16BIT_OUT))
 246                 return -EINVAL;
 247
 248         if (input != decoder->input) {
 249                 decoder->input = input;
 250                 reg = adv7183_read(sd, ADV7183_IN_CTRL) & 0xF0;
 251                 switch (input) {
 252                 case ADV7183_COMPOSITE1:
 253                         reg |= 0x1;
 254                         break;
 255                 case ADV7183_COMPOSITE2:
 256                         reg |= 0x2;
 257                         break;
 258                 case ADV7183_COMPOSITE3:
 259                         reg |= 0x3;
 260                         break;
 261                 case ADV7183_COMPOSITE4:
 262                         reg |= 0x4;
 263                         break;
 264                 case ADV7183_COMPOSITE5:
 265                         reg |= 0x5;
 266                         break;
 267                 case ADV7183_COMPOSITE6:
 268                         reg |= 0xB;
 269                         break;
 270                 case ADV7183_COMPOSITE7:
 271                         reg |= 0xC;
 272                         break;
 273                 case ADV7183_COMPOSITE8:
 274                         reg |= 0xD;
 275                         break;
 276                 case ADV7183_COMPOSITE9:
 277                         reg |= 0xE;
 278                         break;
 279                 case ADV7183_COMPOSITE10:
 280                         reg |= 0xF;
 281                         break;
 282                 case ADV7183_SVIDEO0:
 283                         reg |= 0x6;
 284                         break;
 285                 case ADV7183_SVIDEO1:
 286                         reg |= 0x7;
 287                         break;
 288                 case ADV7183_SVIDEO2:
 289                         reg |= 0x8;
 290                         break;
 291                 case ADV7183_COMPONENT0:
 292                         reg |= 0x9;
 293                         break;
 294                 case ADV7183_COMPONENT1:
 295                         reg |= 0xA;
 296                         break;
 297                 default:
 298                         break;
 299                 }
 300                 adv7183_write(sd, ADV7183_IN_CTRL, reg);
 301         }
 302
 303         if (output != decoder->output) {
 304                 decoder->output = output;
 305                 reg = adv7183_read(sd, ADV7183_OUT_CTRL) & 0xC0;
 306                 switch (output) {
 307                 case ADV7183_16BIT_OUT:
 308                         reg |= 0x9;
 309                         break;
 310                 default:
 311                         reg |= 0xC;
 312                         break;
 313                 }
 314                 adv7183_write(sd, ADV7183_OUT_CTRL, reg);
 315         }
 316
 317         return 0;
 318 }
 319
 320 static int adv7183_s_ctrl(struct v4l2_ctrl *ctrl)
 321 {
 322         struct v4l2_subdev *sd = to_sd(ctrl);
 323         int val = ctrl->val;
 324
 325         switch (ctrl->id) {
 326         case V4L2_CID_BRIGHTNESS:
 327                 if (val < 0)
 328                         val = 127 - val;
 329                 adv7183_write(sd, ADV7183_BRIGHTNESS, val);
 330                 break;
 331         case V4L2_CID_CONTRAST:
 332                 adv7183_write(sd, ADV7183_CONTRAST, val);
 333                 break;
 334         case V4L2_CID_SATURATION:
 335                 adv7183_write(sd, ADV7183_SD_SATURATION_CB, val >> 8);
 336                 adv7183_write(sd, ADV7183_SD_SATURATION_CR, (val & 0xFF));
 337                 break;
 338         case V4L2_CID_HUE:
 339                 adv7183_write(sd, ADV7183_SD_OFFSET_CB, val >> 8);
 340                 adv7183_write(sd, ADV7183_SD_OFFSET_CR, (val & 0xFF));
 341                 break;
 342         default:
 343                 return -EINVAL;
 344         }
 345
 346         return 0;
 347 }
 348
 349 static int adv7183_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 350 {
 351         struct adv7183 *decoder = to_adv7183(sd);
 352         int reg;
 353
 354         /* enable autodetection block */
 355         reg = adv7183_read(sd, ADV7183_IN_CTRL) & 0xF;
 356         adv7183_write(sd, ADV7183_IN_CTRL, reg);
 357
 358         /* wait autodetection switch */
 359         mdelay(10);
 360
 361         /* get autodetection result */
 362         reg = adv7183_read(sd, ADV7183_STATUS_1);
 363         switch ((reg >> 0x4) & 0x7) {
 364         case 0:
 365                 *std &= V4L2_STD_NTSC;
 366                 break;
 367         case 1:
 368                 *std &= V4L2_STD_NTSC_443;
 369                 break;
 370         case 2:
 371                 *std &= V4L2_STD_PAL_M;
 372                 break;
 373         case 3:
 374                 *std &= V4L2_STD_PAL_60;
 375                 break;
 376         case 4:
 377                 *std &= V4L2_STD_PAL;
 378                 break;
 379         case 5:
 380                 *std &= V4L2_STD_SECAM;
 381                 break;
 382         case 6:
 383                 *std &= V4L2_STD_PAL_Nc;
 384                 break;
 385         case 7:
 386                 *std &= V4L2_STD_SECAM;
 387                 break;
 388         default:
 389                 *std = V4L2_STD_UNKNOWN;
 390                 break;
 391         }
 392
 393         /* after std detection, write back user set std */
 394         adv7183_s_std(sd, decoder->std);
 395         return 0;
 396 }
 397
 398 static int adv7183_g_input_status(struct v4l2_subdev *sd, u32 *status)
 399 {
 400         int reg;
 401
 402         *status = V4L2_IN_ST_NO_SIGNAL;
 403         reg = adv7183_read(sd, ADV7183_STATUS_1);
 404         if (reg < 0)
 405                 return reg;
 406         if (reg & 0x1)
 407                 *status = 0;
 408         return 0;
 409 }
 410
 411 static int adv7183_enum_mbus_code(struct v4l2_subdev *sd,
 412                 struct v4l2_subdev_state *sd_state,
 413                 struct v4l2_subdev_mbus_code_enum *code)
 414 {
 415         if (code->pad || code->index > 0)
 416                 return -EINVAL;
 417
 418         code->code = MEDIA_BUS_FMT_UYVY8_2X8;
 419         return 0;
 420 }
 421
 422 static int adv7183_set_fmt(struct v4l2_subdev *sd,
 423                 struct v4l2_subdev_state *sd_state,
 424                 struct v4l2_subdev_format *format)
 425 {
 426         struct adv7183 *decoder = to_adv7183(sd);
 427         struct v4l2_mbus_framefmt *fmt = &format->format;
 428
 429         if (format->pad)
 430                 return -EINVAL;
 431
 432         fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
 433         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 434         if (decoder->std & V4L2_STD_525_60) {
 435                 fmt->field = V4L2_FIELD_SEQ_TB;
 436                 fmt->width = 720;
 437                 fmt->height = 480;
 438         } else {
 439                 fmt->field = V4L2_FIELD_SEQ_BT;
 440                 fmt->width = 720;
 441                 fmt->height = 576;
 442         }
 443         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 444                 decoder->fmt = *fmt;
 445         return 0;
 446 }
 447
 448 static int adv7183_get_fmt(struct v4l2_subdev *sd,
 449                 struct v4l2_subdev_state *sd_state,
 450                 struct v4l2_subdev_format *format)
 451 {
 452         struct adv7183 *decoder = to_adv7183(sd);
 453
 454         if (format->pad)
 455                 return -EINVAL;
 456
 457         format->format = decoder->fmt;
 458         return 0;
 459 }
 460
 461 static int adv7183_s_stream(struct v4l2_subdev *sd, int enable)
 462 {
 463         struct adv7183 *decoder = to_adv7183(sd);
 464
 465         if (enable)
 466                 gpiod_set_value(decoder->oe_pin, 1);
 467         else
 468                 gpiod_set_value(decoder->oe_pin, 0);
 469         udelay(1);
 470         return 0;
 471 }
 472
 473 #ifdef CONFIG_VIDEO_ADV_DEBUG
 474 static int adv7183_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
 475 {
 476         reg->val = adv7183_read(sd, reg->reg & 0xff);
 477         reg->size = 1;
 478         return 0;
 479 }
 480
 481 static int adv7183_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
 482 {
 483         adv7183_write(sd, reg->reg & 0xff, reg->val & 0xff);
 484         return 0;
 485 }
 486 #endif
 487
 488 static const struct v4l2_ctrl_ops adv7183_ctrl_ops = {
 489         .s_ctrl = adv7183_s_ctrl,
 490 };
 491
 492 static const struct v4l2_subdev_core_ops adv7183_core_ops = {
 493         .log_status = adv7183_log_status,
 494         .reset = adv7183_reset,
 495 #ifdef CONFIG_VIDEO_ADV_DEBUG
 496         .g_register = adv7183_g_register,
 497         .s_register = adv7183_s_register,
 498 #endif
 499 };
 500
 501 static const struct v4l2_subdev_video_ops adv7183_video_ops = {
 502         .g_std = adv7183_g_std,
 503         .s_std = adv7183_s_std,
 504         .s_routing = adv7183_s_routing,
 505         .querystd = adv7183_querystd,
 506         .g_input_status = adv7183_g_input_status,
 507         .s_stream = adv7183_s_stream,
 508 };
 509
 510 static const struct v4l2_subdev_pad_ops adv7183_pad_ops = {
 511         .enum_mbus_code = adv7183_enum_mbus_code,
 512         .get_fmt = adv7183_get_fmt,
 513         .set_fmt = adv7183_set_fmt,
 514 };
 515
 516 static const struct v4l2_subdev_ops adv7183_ops = {
 517         .core = &adv7183_core_ops,
 518         .video = &adv7183_video_ops,
 519         .pad = &adv7183_pad_ops,
 520 };
 521
 522 static int adv7183_probe(struct i2c_client *client)
 523 {
 524         struct adv7183 *decoder;
 525         struct v4l2_subdev *sd;
 526         struct v4l2_ctrl_handler *hdl;
 527         int ret;
 528         struct v4l2_subdev_format fmt = {
 529                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 530         };
 531
 532         /* Check if the adapter supports the needed features */
 533         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 534                 return -EIO;
 535
 536         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 537                         client->addr << 1, client->adapter->name);
 538
 539         decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
 540         if (decoder == NULL)
 541                 return -ENOMEM;
 542
 543         /*
 544          * Requesting high will assert reset, the line should be
 545          * flagged as active low in descriptor table or machine description.
 546          */
 547         decoder->reset_pin = devm_gpiod_get(&client->dev, "reset",
 548                                             GPIOD_OUT_HIGH);
 549         if (IS_ERR(decoder->reset_pin))
 550                 return PTR_ERR(decoder->reset_pin);
 551         gpiod_set_consumer_name(decoder->reset_pin, "ADV7183 Reset");
 552         /*
 553          * Requesting low will start with output disabled, the line should be
 554          * flagged as active low in descriptor table or machine description.
 555          */
 556         decoder->oe_pin = devm_gpiod_get(&client->dev, "oe",
 557                                          GPIOD_OUT_LOW);
 558         if (IS_ERR(decoder->oe_pin))
 559                 return PTR_ERR(decoder->oe_pin);
 560         gpiod_set_consumer_name(decoder->reset_pin, "ADV7183 Output Enable");
 561
 562         sd = &decoder->sd;
 563         v4l2_i2c_subdev_init(sd, client, &adv7183_ops);
 564
 565         hdl = &decoder->hdl;
 566         v4l2_ctrl_handler_init(hdl, 4);
 567         v4l2_ctrl_new_std(hdl, &adv7183_ctrl_ops,
 568                         V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
 569         v4l2_ctrl_new_std(hdl, &adv7183_ctrl_ops,
 570                         V4L2_CID_CONTRAST, 0, 0xFF, 1, 0x80);
 571         v4l2_ctrl_new_std(hdl, &adv7183_ctrl_ops,
 572                         V4L2_CID_SATURATION, 0, 0xFFFF, 1, 0x8080);
 573         v4l2_ctrl_new_std(hdl, &adv7183_ctrl_ops,
 574                         V4L2_CID_HUE, 0, 0xFFFF, 1, 0x8080);
 575         /* hook the control handler into the driver */
 576         sd->ctrl_handler = hdl;
 577         if (hdl->error) {
 578                 ret = hdl->error;
 579
 580                 v4l2_ctrl_handler_free(hdl);
 581                 return ret;
 582         }
 583
 584         /* v4l2 doesn't support an autodetect standard, pick PAL as default */
 585         decoder->std = V4L2_STD_PAL;
 586         decoder->input = ADV7183_COMPOSITE4;
 587         decoder->output = ADV7183_8BIT_OUT;
 588
 589         /* reset chip */
 590         /* reset pulse width at least 5ms */
 591         mdelay(10);
 592         /* De-assert reset line (descriptor tagged active low) */
 593         gpiod_set_value(decoder->reset_pin, 0);
 594         /* wait 5ms before any further i2c writes are performed */
 595         mdelay(5);
 596
 597         adv7183_writeregs(sd, adv7183_init_regs, ARRAY_SIZE(adv7183_init_regs));
 598         adv7183_s_std(sd, decoder->std);
 599         fmt.format.width = 720;
 600         fmt.format.height = 576;
 601         adv7183_set_fmt(sd, NULL, &fmt);
 602
 603         /* initialize the hardware to the default control values */
 604         ret = v4l2_ctrl_handler_setup(hdl);
 605         if (ret) {
 606                 v4l2_ctrl_handler_free(hdl);
 607                 return ret;
 608         }
 609
 610         return 0;
 611 }
 612
 613 static void adv7183_remove(struct i2c_client *client)
 614 {
 615         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 616
 617         v4l2_device_unregister_subdev(sd);
 618         v4l2_ctrl_handler_free(sd->ctrl_handler);
 619 }
 620
 621 static const struct i2c_device_id adv7183_id[] = {
 622         {"adv7183", 0},
 623         {},
 624 };
 625
 626 MODULE_DEVICE_TABLE(i2c, adv7183_id);
 627
 628 static struct i2c_driver adv7183_driver = {
 629         .driver = {
 630                 .name   = "adv7183",
 631         },
 632         .probe          = adv7183_probe,
 633         .remove         = adv7183_remove,
 634         .id_table       = adv7183_id,
 635 };
 636
 637 module_i2c_driver(adv7183_driver);
 638
 639 MODULE_DESCRIPTION("Analog Devices ADV7183 video decoder driver");
 640 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
 641 MODULE_LICENSE("GPL v2");