drivers/media/i2c/ml86v7667.c

   1 /*
   2  * OKI Semiconductor ML86V7667 video decoder driver
   3  *
   4  * Author: Vladimir Barinov <source@cogentembedded.com>
   5  * Copyright (C) 2013 Cogent Embedded, Inc.
   6  * Copyright (C) 2013 Renesas Solutions Corp.
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/init.h>
  15 #include <linux/module.h>
  16 #include <linux/i2c.h>
  17 #include <linux/slab.h>
  18 #include <linux/videodev2.h>
  19 #include <media/v4l2-subdev.h>
  20 #include <media/v4l2-device.h>
  21 #include <media/v4l2-ioctl.h>
  22 #include <media/v4l2-ctrls.h>
  23
  24 #define DRV_NAME "ml86v7667"
  25
  26 /* Subaddresses */
  27 #define MRA_REG                 0x00 /* Mode Register A */
  28 #define MRC_REG                 0x02 /* Mode Register C */
  29 #define LUMC_REG                0x0C /* Luminance Control */
  30 #define CLC_REG                 0x10 /* Contrast level control */
  31 #define SSEPL_REG               0x11 /* Sync separation level */
  32 #define CHRCA_REG               0x12 /* Chrominance Control A */
  33 #define ACCC_REG                0x14 /* ACC Loop filter & Chrominance control */
  34 #define ACCRC_REG               0x15 /* ACC Reference level control */
  35 #define HUE_REG                 0x16 /* Hue control */
  36 #define ADC2_REG                0x1F /* ADC Register 2 */
  37 #define PLLR1_REG               0x20 /* PLL Register 1 */
  38 #define STATUS_REG              0x2C /* STATUS Register */
  39
  40 /* Mode Register A register bits */
  41 #define MRA_OUTPUT_MODE_MASK    (3 << 6)
  42 #define MRA_ITUR_BT601          (1 << 6)
  43 #define MRA_ITUR_BT656          (0 << 6)
  44 #define MRA_INPUT_MODE_MASK     (7 << 3)
  45 #define MRA_PAL_BT601           (4 << 3)
  46 #define MRA_NTSC_BT601          (0 << 3)
  47 #define MRA_REGISTER_MODE       (1 << 0)
  48
  49 /* Mode Register C register bits */
  50 #define MRC_AUTOSELECT          (1 << 7)
  51
  52 /* Luminance Control register bits */
  53 #define LUMC_ONOFF_SHIFT        7
  54 #define LUMC_ONOFF_MASK         (1 << 7)
  55
  56 /* Contrast level control register bits */
  57 #define CLC_CONTRAST_ONOFF      (1 << 7)
  58 #define CLC_CONTRAST_MASK       0x0F
  59
  60 /* Sync separation level register bits */
  61 #define SSEPL_LUMINANCE_ONOFF   (1 << 7)
  62 #define SSEPL_LUMINANCE_MASK    0x7F
  63
  64 /* Chrominance Control A register bits */
  65 #define CHRCA_MODE_SHIFT        6
  66 #define CHRCA_MODE_MASK         (1 << 6)
  67
  68 /* ACC Loop filter & Chrominance control register bits */
  69 #define ACCC_CHROMA_CR_SHIFT    3
  70 #define ACCC_CHROMA_CR_MASK     (7 << 3)
  71 #define ACCC_CHROMA_CB_SHIFT    0
  72 #define ACCC_CHROMA_CB_MASK     (7 << 0)
  73
  74 /* ACC Reference level control register bits */
  75 #define ACCRC_CHROMA_MASK       0xfc
  76 #define ACCRC_CHROMA_SHIFT      2
  77
  78 /* ADC Register 2 register bits */
  79 #define ADC2_CLAMP_VOLTAGE_MASK (7 << 1)
  80 #define ADC2_CLAMP_VOLTAGE(n)   ((n & 7) << 1)
  81
  82 /* PLL Register 1 register bits */
  83 #define PLLR1_FIXED_CLOCK       (1 << 7)
  84
  85 /* STATUS Register register bits */
  86 #define STATUS_HLOCK_DETECT     (1 << 3)
  87 #define STATUS_NTSCPAL          (1 << 2)
  88
  89 struct ml86v7667_priv {
  90         struct v4l2_subdev              sd;
  91         struct v4l2_ctrl_handler        hdl;
  92         v4l2_std_id                     std;
  93 };
  94
  95 static inline struct ml86v7667_priv *to_ml86v7667(struct v4l2_subdev *subdev)
  96 {
  97         return container_of(subdev, struct ml86v7667_priv, sd);
  98 }
  99
 100 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 101 {
 102         return &container_of(ctrl->handler, struct ml86v7667_priv, hdl)->sd;
 103 }
 104
 105 static int ml86v7667_mask_set(struct i2c_client *client, const u8 reg,
 106                               const u8 mask, const u8 data)
 107 {
 108         int val = i2c_smbus_read_byte_data(client, reg);
 109         if (val < 0)
 110                 return val;
 111
 112         val = (val & ~mask) | (data & mask);
 113         return i2c_smbus_write_byte_data(client, reg, val);
 114 }
 115
 116 static int ml86v7667_s_ctrl(struct v4l2_ctrl *ctrl)
 117 {
 118         struct v4l2_subdev *sd = to_sd(ctrl);
 119         struct i2c_client *client = v4l2_get_subdevdata(sd);
 120         int ret = -EINVAL;
 121
 122         switch (ctrl->id) {
 123         case V4L2_CID_BRIGHTNESS:
 124                 ret = ml86v7667_mask_set(client, SSEPL_REG,
 125                                          SSEPL_LUMINANCE_MASK, ctrl->val);
 126                 break;
 127         case V4L2_CID_CONTRAST:
 128                 ret = ml86v7667_mask_set(client, CLC_REG,
 129                                          CLC_CONTRAST_MASK, ctrl->val);
 130                 break;
 131         case V4L2_CID_CHROMA_GAIN:
 132                 ret = ml86v7667_mask_set(client, ACCRC_REG, ACCRC_CHROMA_MASK,
 133                                          ctrl->val << ACCRC_CHROMA_SHIFT);
 134                 break;
 135         case V4L2_CID_HUE:
 136                 ret = ml86v7667_mask_set(client, HUE_REG, ~0, ctrl->val);
 137                 break;
 138         case V4L2_CID_RED_BALANCE:
 139                 ret = ml86v7667_mask_set(client, ACCC_REG,
 140                                          ACCC_CHROMA_CR_MASK,
 141                                          ctrl->val << ACCC_CHROMA_CR_SHIFT);
 142                 break;
 143         case V4L2_CID_BLUE_BALANCE:
 144                 ret = ml86v7667_mask_set(client, ACCC_REG,
 145                                          ACCC_CHROMA_CB_MASK,
 146                                          ctrl->val << ACCC_CHROMA_CB_SHIFT);
 147                 break;
 148         case V4L2_CID_SHARPNESS:
 149                 ret = ml86v7667_mask_set(client, LUMC_REG,
 150                                          LUMC_ONOFF_MASK,
 151                                          ctrl->val << LUMC_ONOFF_SHIFT);
 152                 break;
 153         case V4L2_CID_COLOR_KILLER:
 154                 ret = ml86v7667_mask_set(client, CHRCA_REG,
 155                                          CHRCA_MODE_MASK,
 156                                          ctrl->val << CHRCA_MODE_SHIFT);
 157                 break;
 158         }
 159
 160         return ret;
 161 }
 162
 163 static int ml86v7667_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 164 {
 165         struct i2c_client *client = v4l2_get_subdevdata(sd);
 166         int status;
 167
 168         status = i2c_smbus_read_byte_data(client, STATUS_REG);
 169         if (status < 0)
 170                 return status;
 171
 172         if (status & STATUS_HLOCK_DETECT)
 173                 *std &= status & STATUS_NTSCPAL ? V4L2_STD_625_50 : V4L2_STD_525_60;
 174         else
 175                 *std = V4L2_STD_UNKNOWN;
 176
 177         return 0;
 178 }
 179
 180 static int ml86v7667_g_input_status(struct v4l2_subdev *sd, u32 *status)
 181 {
 182         struct i2c_client *client = v4l2_get_subdevdata(sd);
 183         int status_reg;
 184
 185         status_reg = i2c_smbus_read_byte_data(client, STATUS_REG);
 186         if (status_reg < 0)
 187                 return status_reg;
 188
 189         *status = status_reg & STATUS_HLOCK_DETECT ? 0 : V4L2_IN_ST_NO_SIGNAL;
 190
 191         return 0;
 192 }
 193
 194 static int ml86v7667_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index,
 195                                    enum v4l2_mbus_pixelcode *code)
 196 {
 197         if (index > 0)
 198                 return -EINVAL;
 199
 200         *code = V4L2_MBUS_FMT_YUYV8_2X8;
 201
 202         return 0;
 203 }
 204
 205 static int ml86v7667_mbus_fmt(struct v4l2_subdev *sd,
 206                               struct v4l2_mbus_framefmt *fmt)
 207 {
 208         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 209
 210         fmt->code = V4L2_MBUS_FMT_YUYV8_2X8;
 211         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 212         /* The top field is always transferred first by the chip */
 213         fmt->field = V4L2_FIELD_INTERLACED_TB;
 214         fmt->width = 720;
 215         fmt->height = priv->std & V4L2_STD_525_60 ? 480 : 576;
 216
 217         return 0;
 218 }
 219
 220 static int ml86v7667_g_mbus_config(struct v4l2_subdev *sd,
 221                                    struct v4l2_mbus_config *cfg)
 222 {
 223         cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
 224                      V4L2_MBUS_DATA_ACTIVE_HIGH;
 225         cfg->type = V4L2_MBUS_BT656;
 226
 227         return 0;
 228 }
 229
 230 static int ml86v7667_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 231 {
 232         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 233         struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
 234         int ret;
 235         u8 mode;
 236
 237         /* PAL/NTSC ITU-R BT.601 input mode */
 238         mode = std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601;
 239         ret = ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, mode);
 240         if (ret < 0)
 241                 return ret;
 242
 243         priv->std = std;
 244
 245         return 0;
 246 }
 247
 248 #ifdef CONFIG_VIDEO_ADV_DEBUG
 249 static int ml86v7667_g_register(struct v4l2_subdev *sd,
 250                                 struct v4l2_dbg_register *reg)
 251 {
 252         struct i2c_client *client = v4l2_get_subdevdata(sd);
 253         int ret;
 254
 255         ret = i2c_smbus_read_byte_data(client, (u8)reg->reg);
 256         if (ret < 0)
 257                 return ret;
 258
 259         reg->val = ret;
 260         reg->size = sizeof(u8);
 261
 262         return 0;
 263 }
 264
 265 static int ml86v7667_s_register(struct v4l2_subdev *sd,
 266                                 const struct v4l2_dbg_register *reg)
 267 {
 268         struct i2c_client *client = v4l2_get_subdevdata(sd);
 269
 270         return i2c_smbus_write_byte_data(client, (u8)reg->reg, (u8)reg->val);
 271 }
 272 #endif
 273
 274 static const struct v4l2_ctrl_ops ml86v7667_ctrl_ops = {
 275         .s_ctrl = ml86v7667_s_ctrl,
 276 };
 277
 278 static struct v4l2_subdev_video_ops ml86v7667_subdev_video_ops = {
 279         .querystd = ml86v7667_querystd,
 280         .g_input_status = ml86v7667_g_input_status,
 281         .enum_mbus_fmt = ml86v7667_enum_mbus_fmt,
 282         .try_mbus_fmt = ml86v7667_mbus_fmt,
 283         .g_mbus_fmt = ml86v7667_mbus_fmt,
 284         .s_mbus_fmt = ml86v7667_mbus_fmt,
 285         .g_mbus_config = ml86v7667_g_mbus_config,
 286 };
 287
 288 static struct v4l2_subdev_core_ops ml86v7667_subdev_core_ops = {
 289         .s_std = ml86v7667_s_std,
 290 #ifdef CONFIG_VIDEO_ADV_DEBUG
 291         .g_register = ml86v7667_g_register,
 292         .s_register = ml86v7667_s_register,
 293 #endif
 294 };
 295
 296 static struct v4l2_subdev_ops ml86v7667_subdev_ops = {
 297         .core = &ml86v7667_subdev_core_ops,
 298         .video = &ml86v7667_subdev_video_ops,
 299 };
 300
 301 static int ml86v7667_init(struct ml86v7667_priv *priv)
 302 {
 303         struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
 304         int val;
 305         int ret;
 306
 307         /* BT.656-4 output mode, register mode */
 308         ret = ml86v7667_mask_set(client, MRA_REG,
 309                                  MRA_OUTPUT_MODE_MASK | MRA_REGISTER_MODE,
 310                                  MRA_ITUR_BT656 | MRA_REGISTER_MODE);
 311
 312         /* PLL circuit fixed clock, 32MHz */
 313         ret |= ml86v7667_mask_set(client, PLLR1_REG, PLLR1_FIXED_CLOCK,
 314                                   PLLR1_FIXED_CLOCK);
 315
 316         /* ADC2 clamping voltage maximum  */
 317         ret |= ml86v7667_mask_set(client, ADC2_REG, ADC2_CLAMP_VOLTAGE_MASK,
 318                                   ADC2_CLAMP_VOLTAGE(7));
 319
 320         /* enable luminance function */
 321         ret |= ml86v7667_mask_set(client, SSEPL_REG, SSEPL_LUMINANCE_ONOFF,
 322                                   SSEPL_LUMINANCE_ONOFF);
 323
 324         /* enable contrast function */
 325         ret |= ml86v7667_mask_set(client, CLC_REG, CLC_CONTRAST_ONOFF, 0);
 326
 327         /*
 328          * PAL/NTSC autodetection is enabled after reset,
 329          * set the autodetected std in manual std mode and
 330          * disable autodetection
 331          */
 332         val = i2c_smbus_read_byte_data(client, STATUS_REG);
 333         if (val < 0)
 334                 return val;
 335
 336         priv->std = val & STATUS_NTSCPAL ? V4L2_STD_625_50 : V4L2_STD_525_60;
 337         ret |= ml86v7667_mask_set(client, MRC_REG, MRC_AUTOSELECT, 0);
 338
 339         val = priv->std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601;
 340         ret |= ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, val);
 341
 342         return ret;
 343 }
 344
 345 static int ml86v7667_probe(struct i2c_client *client,
 346                            const struct i2c_device_id *did)
 347 {
 348         struct ml86v7667_priv *priv;
 349         int ret;
 350
 351         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 352                 return -EIO;
 353
 354         priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 355         if (!priv)
 356                 return -ENOMEM;
 357
 358         v4l2_i2c_subdev_init(&priv->sd, client, &ml86v7667_subdev_ops);
 359
 360         v4l2_ctrl_handler_init(&priv->hdl, 8);
 361         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 362                           V4L2_CID_BRIGHTNESS, -64, 63, 1, 0);
 363         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 364                           V4L2_CID_CONTRAST, -8, 7, 1, 0);
 365         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 366                           V4L2_CID_CHROMA_GAIN, -32, 31, 1, 0);
 367         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 368                           V4L2_CID_HUE, -128, 127, 1, 0);
 369         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 370                           V4L2_CID_RED_BALANCE, -4, 3, 1, 0);
 371         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 372                           V4L2_CID_BLUE_BALANCE, -4, 3, 1, 0);
 373         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 374                           V4L2_CID_SHARPNESS, 0, 1, 1, 0);
 375         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 376                           V4L2_CID_COLOR_KILLER, 0, 1, 1, 0);
 377         priv->sd.ctrl_handler = &priv->hdl;
 378
 379         ret = priv->hdl.error;
 380         if (ret)
 381                 goto cleanup;
 382
 383         v4l2_ctrl_handler_setup(&priv->hdl);
 384
 385         ret = ml86v7667_init(priv);
 386         if (ret)
 387                 goto cleanup;
 388
 389         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 390                  client->addr, client->adapter->name);
 391         return 0;
 392
 393 cleanup:
 394         v4l2_ctrl_handler_free(&priv->hdl);
 395         v4l2_device_unregister_subdev(&priv->sd);
 396         v4l_err(client, "failed to probe @ 0x%02x (%s)\n",
 397                 client->addr, client->adapter->name);
 398         return ret;
 399 }
 400
 401 static int ml86v7667_remove(struct i2c_client *client)
 402 {
 403         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 404         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 405
 406         v4l2_ctrl_handler_free(&priv->hdl);
 407         v4l2_device_unregister_subdev(&priv->sd);
 408
 409         return 0;
 410 }
 411
 412 static const struct i2c_device_id ml86v7667_id[] = {
 413         {DRV_NAME, 0},
 414         {},
 415 };
 416 MODULE_DEVICE_TABLE(i2c, ml86v7667_id);
 417
 418 static struct i2c_driver ml86v7667_i2c_driver = {
 419         .driver = {
 420                 .name   = DRV_NAME,
 421                 .owner  = THIS_MODULE,
 422         },
 423         .probe          = ml86v7667_probe,
 424         .remove         = ml86v7667_remove,
 425         .id_table       = ml86v7667_id,
 426 };
 427
 428 module_i2c_driver(ml86v7667_i2c_driver);
 429
 430 MODULE_DESCRIPTION("OKI Semiconductor ML86V7667 video decoder driver");
 431 MODULE_AUTHOR("Vladimir Barinov");
 432 MODULE_LICENSE("GPL");