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_code(struct v4l2_subdev *sd,
 195                 struct v4l2_subdev_pad_config *cfg,
 196                 struct v4l2_subdev_mbus_code_enum *code)
 197 {
 198         if (code->pad || code->index > 0)
 199                 return -EINVAL;
 200
 201         code->code = MEDIA_BUS_FMT_YUYV8_2X8;
 202
 203         return 0;
 204 }
 205
 206 static int ml86v7667_fill_fmt(struct v4l2_subdev *sd,
 207                 struct v4l2_subdev_pad_config *cfg,
 208                 struct v4l2_subdev_format *format)
 209 {
 210         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 211         struct v4l2_mbus_framefmt *fmt = &format->format;
 212
 213         if (format->pad)
 214                 return -EINVAL;
 215
 216         fmt->code = MEDIA_BUS_FMT_YUYV8_2X8;
 217         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 218         /* The top field is always transferred first by the chip */
 219         fmt->field = V4L2_FIELD_INTERLACED_TB;
 220         fmt->width = 720;
 221         fmt->height = priv->std & V4L2_STD_525_60 ? 480 : 576;
 222
 223         return 0;
 224 }
 225
 226 static int ml86v7667_g_mbus_config(struct v4l2_subdev *sd,
 227                                    struct v4l2_mbus_config *cfg)
 228 {
 229         cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
 230                      V4L2_MBUS_DATA_ACTIVE_HIGH;
 231         cfg->type = V4L2_MBUS_BT656;
 232
 233         return 0;
 234 }
 235
 236 static int ml86v7667_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 237 {
 238         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 239         struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
 240         int ret;
 241         u8 mode;
 242
 243         /* PAL/NTSC ITU-R BT.601 input mode */
 244         mode = std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601;
 245         ret = ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, mode);
 246         if (ret < 0)
 247                 return ret;
 248
 249         priv->std = std;
 250
 251         return 0;
 252 }
 253
 254 #ifdef CONFIG_VIDEO_ADV_DEBUG
 255 static int ml86v7667_g_register(struct v4l2_subdev *sd,
 256                                 struct v4l2_dbg_register *reg)
 257 {
 258         struct i2c_client *client = v4l2_get_subdevdata(sd);
 259         int ret;
 260
 261         ret = i2c_smbus_read_byte_data(client, (u8)reg->reg);
 262         if (ret < 0)
 263                 return ret;
 264
 265         reg->val = ret;
 266         reg->size = sizeof(u8);
 267
 268         return 0;
 269 }
 270
 271 static int ml86v7667_s_register(struct v4l2_subdev *sd,
 272                                 const struct v4l2_dbg_register *reg)
 273 {
 274         struct i2c_client *client = v4l2_get_subdevdata(sd);
 275
 276         return i2c_smbus_write_byte_data(client, (u8)reg->reg, (u8)reg->val);
 277 }
 278 #endif
 279
 280 static const struct v4l2_ctrl_ops ml86v7667_ctrl_ops = {
 281         .s_ctrl = ml86v7667_s_ctrl,
 282 };
 283
 284 static struct v4l2_subdev_video_ops ml86v7667_subdev_video_ops = {
 285         .s_std = ml86v7667_s_std,
 286         .querystd = ml86v7667_querystd,
 287         .g_input_status = ml86v7667_g_input_status,
 288         .g_mbus_config = ml86v7667_g_mbus_config,
 289 };
 290
 291 static const struct v4l2_subdev_pad_ops ml86v7667_subdev_pad_ops = {
 292         .enum_mbus_code = ml86v7667_enum_mbus_code,
 293         .get_fmt = ml86v7667_fill_fmt,
 294         .set_fmt = ml86v7667_fill_fmt,
 295 };
 296
 297 static struct v4l2_subdev_core_ops ml86v7667_subdev_core_ops = {
 298 #ifdef CONFIG_VIDEO_ADV_DEBUG
 299         .g_register = ml86v7667_g_register,
 300         .s_register = ml86v7667_s_register,
 301 #endif
 302 };
 303
 304 static struct v4l2_subdev_ops ml86v7667_subdev_ops = {
 305         .core = &ml86v7667_subdev_core_ops,
 306         .video = &ml86v7667_subdev_video_ops,
 307         .pad = &ml86v7667_subdev_pad_ops,
 308 };
 309
 310 static int ml86v7667_init(struct ml86v7667_priv *priv)
 311 {
 312         struct i2c_client *client = v4l2_get_subdevdata(&priv->sd);
 313         int val;
 314         int ret;
 315
 316         /* BT.656-4 output mode, register mode */
 317         ret = ml86v7667_mask_set(client, MRA_REG,
 318                                  MRA_OUTPUT_MODE_MASK | MRA_REGISTER_MODE,
 319                                  MRA_ITUR_BT656 | MRA_REGISTER_MODE);
 320
 321         /* PLL circuit fixed clock, 32MHz */
 322         ret |= ml86v7667_mask_set(client, PLLR1_REG, PLLR1_FIXED_CLOCK,
 323                                   PLLR1_FIXED_CLOCK);
 324
 325         /* ADC2 clamping voltage maximum  */
 326         ret |= ml86v7667_mask_set(client, ADC2_REG, ADC2_CLAMP_VOLTAGE_MASK,
 327                                   ADC2_CLAMP_VOLTAGE(7));
 328
 329         /* enable luminance function */
 330         ret |= ml86v7667_mask_set(client, SSEPL_REG, SSEPL_LUMINANCE_ONOFF,
 331                                   SSEPL_LUMINANCE_ONOFF);
 332
 333         /* enable contrast function */
 334         ret |= ml86v7667_mask_set(client, CLC_REG, CLC_CONTRAST_ONOFF, 0);
 335
 336         /*
 337          * PAL/NTSC autodetection is enabled after reset,
 338          * set the autodetected std in manual std mode and
 339          * disable autodetection
 340          */
 341         val = i2c_smbus_read_byte_data(client, STATUS_REG);
 342         if (val < 0)
 343                 return val;
 344
 345         priv->std = val & STATUS_NTSCPAL ? V4L2_STD_625_50 : V4L2_STD_525_60;
 346         ret |= ml86v7667_mask_set(client, MRC_REG, MRC_AUTOSELECT, 0);
 347
 348         val = priv->std & V4L2_STD_525_60 ? MRA_NTSC_BT601 : MRA_PAL_BT601;
 349         ret |= ml86v7667_mask_set(client, MRA_REG, MRA_INPUT_MODE_MASK, val);
 350
 351         return ret;
 352 }
 353
 354 static int ml86v7667_probe(struct i2c_client *client,
 355                            const struct i2c_device_id *did)
 356 {
 357         struct ml86v7667_priv *priv;
 358         int ret;
 359
 360         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 361                 return -EIO;
 362
 363         priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 364         if (!priv)
 365                 return -ENOMEM;
 366
 367         v4l2_i2c_subdev_init(&priv->sd, client, &ml86v7667_subdev_ops);
 368
 369         v4l2_ctrl_handler_init(&priv->hdl, 8);
 370         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 371                           V4L2_CID_BRIGHTNESS, -64, 63, 1, 0);
 372         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 373                           V4L2_CID_CONTRAST, -8, 7, 1, 0);
 374         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 375                           V4L2_CID_CHROMA_GAIN, -32, 31, 1, 0);
 376         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 377                           V4L2_CID_HUE, -128, 127, 1, 0);
 378         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 379                           V4L2_CID_RED_BALANCE, -4, 3, 1, 0);
 380         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 381                           V4L2_CID_BLUE_BALANCE, -4, 3, 1, 0);
 382         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 383                           V4L2_CID_SHARPNESS, 0, 1, 1, 0);
 384         v4l2_ctrl_new_std(&priv->hdl, &ml86v7667_ctrl_ops,
 385                           V4L2_CID_COLOR_KILLER, 0, 1, 1, 0);
 386         priv->sd.ctrl_handler = &priv->hdl;
 387
 388         ret = priv->hdl.error;
 389         if (ret)
 390                 goto cleanup;
 391
 392         v4l2_ctrl_handler_setup(&priv->hdl);
 393
 394         ret = ml86v7667_init(priv);
 395         if (ret)
 396                 goto cleanup;
 397
 398         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 399                  client->addr, client->adapter->name);
 400         return 0;
 401
 402 cleanup:
 403         v4l2_ctrl_handler_free(&priv->hdl);
 404         v4l2_device_unregister_subdev(&priv->sd);
 405         v4l_err(client, "failed to probe @ 0x%02x (%s)\n",
 406                 client->addr, client->adapter->name);
 407         return ret;
 408 }
 409
 410 static int ml86v7667_remove(struct i2c_client *client)
 411 {
 412         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 413         struct ml86v7667_priv *priv = to_ml86v7667(sd);
 414
 415         v4l2_ctrl_handler_free(&priv->hdl);
 416         v4l2_device_unregister_subdev(&priv->sd);
 417
 418         return 0;
 419 }
 420
 421 static const struct i2c_device_id ml86v7667_id[] = {
 422         {DRV_NAME, 0},
 423         {},
 424 };
 425 MODULE_DEVICE_TABLE(i2c, ml86v7667_id);
 426
 427 static struct i2c_driver ml86v7667_i2c_driver = {
 428         .driver = {
 429                 .name   = DRV_NAME,
 430                 .owner  = THIS_MODULE,
 431         },
 432         .probe          = ml86v7667_probe,
 433         .remove         = ml86v7667_remove,
 434         .id_table       = ml86v7667_id,
 435 };
 436
 437 module_i2c_driver(ml86v7667_i2c_driver);
 438
 439 MODULE_DESCRIPTION("OKI Semiconductor ML86V7667 video decoder driver");
 440 MODULE_AUTHOR("Vladimir Barinov");
 441 MODULE_LICENSE("GPL");