drivers/media/i2c/adv7175.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  adv7175 - adv7175a video encoder driver version 0.0.3
   4  *
   5  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   6  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9  *
  10  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/slab.h>
  17 #include <linux/ioctl.h>
  18 #include <linux/uaccess.h>
  19 #include <linux/i2c.h>
  20 #include <linux/videodev2.h>
  21 #include <media/v4l2-device.h>
  22
  23 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  24 MODULE_AUTHOR("Dave Perks");
  25 MODULE_LICENSE("GPL");
  26
  27 #define   I2C_ADV7175        0xd4
  28 #define   I2C_ADV7176        0x54
  29
  30
  31 static int debug;
  32 module_param(debug, int, 0);
  33 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  34
  35 /* ----------------------------------------------------------------------- */
  36
  37 struct adv7175 {
  38         struct v4l2_subdev sd;
  39         v4l2_std_id norm;
  40         int input;
  41 };
  42
  43 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  44 {
  45         return container_of(sd, struct adv7175, sd);
  46 }
  47
  48 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  49
  50 static u32 adv7175_codes[] = {
  51         MEDIA_BUS_FMT_UYVY8_2X8,
  52         MEDIA_BUS_FMT_UYVY8_1X16,
  53 };
  54
  55 /* ----------------------------------------------------------------------- */
  56
  57 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  58 {
  59         struct i2c_client *client = v4l2_get_subdevdata(sd);
  60
  61         return i2c_smbus_write_byte_data(client, reg, value);
  62 }
  63
  64 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  65 {
  66         struct i2c_client *client = v4l2_get_subdevdata(sd);
  67
  68         return i2c_smbus_read_byte_data(client, reg);
  69 }
  70
  71 static int adv7175_write_block(struct v4l2_subdev *sd,
  72                      const u8 *data, unsigned int len)
  73 {
  74         struct i2c_client *client = v4l2_get_subdevdata(sd);
  75         int ret = -1;
  76         u8 reg;
  77
  78         /* the adv7175 has an autoincrement function, use it if
  79          * the adapter understands raw I2C */
  80         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  81                 /* do raw I2C, not smbus compatible */
  82                 u8 block_data[32];
  83                 int block_len;
  84
  85                 while (len >= 2) {
  86                         block_len = 0;
  87                         block_data[block_len++] = reg = data[0];
  88                         do {
  89                                 block_data[block_len++] = data[1];
  90                                 reg++;
  91                                 len -= 2;
  92                                 data += 2;
  93                         } while (len >= 2 && data[0] == reg && block_len < 32);
  94                         ret = i2c_master_send(client, block_data, block_len);
  95                         if (ret < 0)
  96                                 break;
  97                 }
  98         } else {
  99                 /* do some slow I2C emulation kind of thing */
 100                 while (len >= 2) {
 101                         reg = *data++;
 102                         ret = adv7175_write(sd, reg, *data++);
 103                         if (ret < 0)
 104                                 break;
 105                         len -= 2;
 106                 }
 107         }
 108
 109         return ret;
 110 }
 111
 112 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 113 {
 114         /* for some reason pass_through NTSC needs
 115          * a different sub-carrier freq to remain stable. */
 116         if (pass_through)
 117                 adv7175_write(sd, 0x02, 0x00);
 118         else
 119                 adv7175_write(sd, 0x02, 0x55);
 120
 121         adv7175_write(sd, 0x03, 0x55);
 122         adv7175_write(sd, 0x04, 0x55);
 123         adv7175_write(sd, 0x05, 0x25);
 124 }
 125
 126 /* ----------------------------------------------------------------------- */
 127 /* Output filter:  S-Video  Composite */
 128
 129 #define MR050       0x11        /* 0x09 */
 130 #define MR060       0x14        /* 0x0c */
 131
 132 /* ----------------------------------------------------------------------- */
 133
 134 #define TR0MODE     0x46
 135 #define TR0RST      0x80
 136
 137 #define TR1CAPT     0x80
 138 #define TR1PLAY     0x00
 139
 140 static const unsigned char init_common[] = {
 141
 142         0x00, MR050,            /* MR0, PAL enabled */
 143         0x01, 0x00,             /* MR1 */
 144         0x02, 0x0c,             /* subc. freq. */
 145         0x03, 0x8c,             /* subc. freq. */
 146         0x04, 0x79,             /* subc. freq. */
 147         0x05, 0x26,             /* subc. freq. */
 148         0x06, 0x40,             /* subc. phase */
 149
 150         0x07, TR0MODE,          /* TR0, 16bit */
 151         0x08, 0x21,             /*  */
 152         0x09, 0x00,             /*  */
 153         0x0a, 0x00,             /*  */
 154         0x0b, 0x00,             /*  */
 155         0x0c, TR1CAPT,          /* TR1 */
 156         0x0d, 0x4f,             /* MR2 */
 157         0x0e, 0x00,             /*  */
 158         0x0f, 0x00,             /*  */
 159         0x10, 0x00,             /*  */
 160         0x11, 0x00,             /*  */
 161 };
 162
 163 static const unsigned char init_pal[] = {
 164         0x00, MR050,            /* MR0, PAL enabled */
 165         0x01, 0x00,             /* MR1 */
 166         0x02, 0x0c,             /* subc. freq. */
 167         0x03, 0x8c,             /* subc. freq. */
 168         0x04, 0x79,             /* subc. freq. */
 169         0x05, 0x26,             /* subc. freq. */
 170         0x06, 0x40,             /* subc. phase */
 171 };
 172
 173 static const unsigned char init_ntsc[] = {
 174         0x00, MR060,            /* MR0, NTSC enabled */
 175         0x01, 0x00,             /* MR1 */
 176         0x02, 0x55,             /* subc. freq. */
 177         0x03, 0x55,             /* subc. freq. */
 178         0x04, 0x55,             /* subc. freq. */
 179         0x05, 0x25,             /* subc. freq. */
 180         0x06, 0x1a,             /* subc. phase */
 181 };
 182
 183 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 184 {
 185         /* This is just for testing!!! */
 186         adv7175_write_block(sd, init_common, sizeof(init_common));
 187         adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 188         adv7175_write(sd, 0x07, TR0MODE);
 189         return 0;
 190 }
 191
 192 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 193 {
 194         struct adv7175 *encoder = to_adv7175(sd);
 195
 196         if (std & V4L2_STD_NTSC) {
 197                 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 198                 if (encoder->input == 0)
 199                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 200                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 201                 adv7175_write(sd, 0x07, TR0MODE);
 202         } else if (std & V4L2_STD_PAL) {
 203                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 204                 if (encoder->input == 0)
 205                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 206                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 207                 adv7175_write(sd, 0x07, TR0MODE);
 208         } else if (std & V4L2_STD_SECAM) {
 209                 /* This is an attempt to convert
 210                  * SECAM->PAL (typically it does not work
 211                  * due to genlock: when decoder is in SECAM
 212                  * and encoder in in PAL the subcarrier can
 213                  * not be synchronized with horizontal
 214                  * quency) */
 215                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 216                 if (encoder->input == 0)
 217                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 218                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 219                 adv7175_write(sd, 0x07, TR0MODE);
 220         } else {
 221                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 222                                 (unsigned long long)std);
 223                 return -EINVAL;
 224         }
 225         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 226         encoder->norm = std;
 227         return 0;
 228 }
 229
 230 static int adv7175_s_routing(struct v4l2_subdev *sd,
 231                              u32 input, u32 output, u32 config)
 232 {
 233         struct adv7175 *encoder = to_adv7175(sd);
 234
 235         /* RJ: input = 0: input is from decoder
 236            input = 1: input is from ZR36060
 237            input = 2: color bar */
 238
 239         switch (input) {
 240         case 0:
 241                 adv7175_write(sd, 0x01, 0x00);
 242
 243                 if (encoder->norm & V4L2_STD_NTSC)
 244                         set_subcarrier_freq(sd, 1);
 245
 246                 adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 247                 if (encoder->norm & V4L2_STD_SECAM)
 248                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 249                 else
 250                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 251                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 252                 adv7175_write(sd, 0x07, TR0MODE);
 253                 /*udelay(10);*/
 254                 break;
 255
 256         case 1:
 257                 adv7175_write(sd, 0x01, 0x00);
 258
 259                 if (encoder->norm & V4L2_STD_NTSC)
 260                         set_subcarrier_freq(sd, 0);
 261
 262                 adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 263                 adv7175_write(sd, 0x0d, 0x49);
 264                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 265                 adv7175_write(sd, 0x07, TR0MODE);
 266                 /* udelay(10); */
 267                 break;
 268
 269         case 2:
 270                 adv7175_write(sd, 0x01, 0x80);
 271
 272                 if (encoder->norm & V4L2_STD_NTSC)
 273                         set_subcarrier_freq(sd, 0);
 274
 275                 adv7175_write(sd, 0x0d, 0x49);
 276                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 277                 adv7175_write(sd, 0x07, TR0MODE);
 278                 /* udelay(10); */
 279                 break;
 280
 281         default:
 282                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 283                 return -EINVAL;
 284         }
 285         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 286         encoder->input = input;
 287         return 0;
 288 }
 289
 290 static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
 291                 struct v4l2_subdev_pad_config *cfg,
 292                 struct v4l2_subdev_mbus_code_enum *code)
 293 {
 294         if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
 295                 return -EINVAL;
 296
 297         code->code = adv7175_codes[code->index];
 298         return 0;
 299 }
 300
 301 static int adv7175_get_fmt(struct v4l2_subdev *sd,
 302                 struct v4l2_subdev_pad_config *cfg,
 303                 struct v4l2_subdev_format *format)
 304 {
 305         struct v4l2_mbus_framefmt *mf = &format->format;
 306         u8 val = adv7175_read(sd, 0x7);
 307
 308         if (format->pad)
 309                 return -EINVAL;
 310
 311         if ((val & 0x40) == (1 << 6))
 312                 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 313         else
 314                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 315
 316         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 317         mf->width       = 0;
 318         mf->height      = 0;
 319         mf->field       = V4L2_FIELD_ANY;
 320
 321         return 0;
 322 }
 323
 324 static int adv7175_set_fmt(struct v4l2_subdev *sd,
 325                 struct v4l2_subdev_pad_config *cfg,
 326                 struct v4l2_subdev_format *format)
 327 {
 328         struct v4l2_mbus_framefmt *mf = &format->format;
 329         u8 val = adv7175_read(sd, 0x7);
 330         int ret = 0;
 331
 332         if (format->pad)
 333                 return -EINVAL;
 334
 335         switch (mf->code) {
 336         case MEDIA_BUS_FMT_UYVY8_2X8:
 337                 val &= ~0x40;
 338                 break;
 339
 340         case MEDIA_BUS_FMT_UYVY8_1X16:
 341                 val |= 0x40;
 342                 break;
 343
 344         default:
 345                 v4l2_dbg(1, debug, sd,
 346                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 347                 return -EINVAL;
 348         }
 349
 350         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 351                 ret = adv7175_write(sd, 0x7, val);
 352
 353         return ret;
 354 }
 355
 356 static int adv7175_s_power(struct v4l2_subdev *sd, int on)
 357 {
 358         if (on)
 359                 adv7175_write(sd, 0x01, 0x00);
 360         else
 361                 adv7175_write(sd, 0x01, 0x78);
 362
 363         return 0;
 364 }
 365
 366 /* ----------------------------------------------------------------------- */
 367
 368 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 369         .init = adv7175_init,
 370         .s_power = adv7175_s_power,
 371 };
 372
 373 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 374         .s_std_output = adv7175_s_std_output,
 375         .s_routing = adv7175_s_routing,
 376 };
 377
 378 static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
 379         .enum_mbus_code = adv7175_enum_mbus_code,
 380         .get_fmt = adv7175_get_fmt,
 381         .set_fmt = adv7175_set_fmt,
 382 };
 383
 384 static const struct v4l2_subdev_ops adv7175_ops = {
 385         .core = &adv7175_core_ops,
 386         .video = &adv7175_video_ops,
 387         .pad = &adv7175_pad_ops,
 388 };
 389
 390 /* ----------------------------------------------------------------------- */
 391
 392 static int adv7175_probe(struct i2c_client *client,
 393                         const struct i2c_device_id *id)
 394 {
 395         int i;
 396         struct adv7175 *encoder;
 397         struct v4l2_subdev *sd;
 398
 399         /* Check if the adapter supports the needed features */
 400         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 401                 return -ENODEV;
 402
 403         v4l_info(client, "chip found @ 0x%x (%s)\n",
 404                         client->addr << 1, client->adapter->name);
 405
 406         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 407         if (encoder == NULL)
 408                 return -ENOMEM;
 409         sd = &encoder->sd;
 410         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 411         encoder->norm = V4L2_STD_NTSC;
 412         encoder->input = 0;
 413
 414         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 415         if (i >= 0) {
 416                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 417                 i = adv7175_write(sd, 0x07, TR0MODE);
 418                 i = adv7175_read(sd, 0x12);
 419                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 420         }
 421         if (i < 0)
 422                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 423         return 0;
 424 }
 425
 426 static int adv7175_remove(struct i2c_client *client)
 427 {
 428         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 429
 430         v4l2_device_unregister_subdev(sd);
 431         return 0;
 432 }
 433
 434 /* ----------------------------------------------------------------------- */
 435
 436 static const struct i2c_device_id adv7175_id[] = {
 437         { "adv7175", 0 },
 438         { "adv7176", 0 },
 439         { }
 440 };
 441 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 442
 443 static struct i2c_driver adv7175_driver = {
 444         .driver = {
 445                 .name   = "adv7175",
 446         },
 447         .probe          = adv7175_probe,
 448         .remove         = adv7175_remove,
 449         .id_table       = adv7175_id,
 450 };
 451
 452 module_i2c_driver(adv7175_driver);