drivers/media/i2c/adv7175.c

   1 /*
   2  *  adv7175 - adv7175a video encoder driver version 0.0.3
   3  *
   4  * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   6  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   7  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   8  *
   9  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10  *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/slab.h>
  30 #include <linux/ioctl.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/i2c.h>
  33 #include <linux/videodev2.h>
  34 #include <media/v4l2-device.h>
  35
  36 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  37 MODULE_AUTHOR("Dave Perks");
  38 MODULE_LICENSE("GPL");
  39
  40 #define   I2C_ADV7175        0xd4
  41 #define   I2C_ADV7176        0x54
  42
  43
  44 static int debug;
  45 module_param(debug, int, 0);
  46 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  47
  48 /* ----------------------------------------------------------------------- */
  49
  50 struct adv7175 {
  51         struct v4l2_subdev sd;
  52         v4l2_std_id norm;
  53         int input;
  54 };
  55
  56 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  57 {
  58         return container_of(sd, struct adv7175, sd);
  59 }
  60
  61 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  62
  63 static u32 adv7175_codes[] = {
  64         MEDIA_BUS_FMT_UYVY8_2X8,
  65         MEDIA_BUS_FMT_UYVY8_1X16,
  66 };
  67
  68 /* ----------------------------------------------------------------------- */
  69
  70 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71 {
  72         struct i2c_client *client = v4l2_get_subdevdata(sd);
  73
  74         return i2c_smbus_write_byte_data(client, reg, value);
  75 }
  76
  77 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  78 {
  79         struct i2c_client *client = v4l2_get_subdevdata(sd);
  80
  81         return i2c_smbus_read_byte_data(client, reg);
  82 }
  83
  84 static int adv7175_write_block(struct v4l2_subdev *sd,
  85                      const u8 *data, unsigned int len)
  86 {
  87         struct i2c_client *client = v4l2_get_subdevdata(sd);
  88         int ret = -1;
  89         u8 reg;
  90
  91         /* the adv7175 has an autoincrement function, use it if
  92          * the adapter understands raw I2C */
  93         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  94                 /* do raw I2C, not smbus compatible */
  95                 u8 block_data[32];
  96                 int block_len;
  97
  98                 while (len >= 2) {
  99                         block_len = 0;
 100                         block_data[block_len++] = reg = data[0];
 101                         do {
 102                                 block_data[block_len++] = data[1];
 103                                 reg++;
 104                                 len -= 2;
 105                                 data += 2;
 106                         } while (len >= 2 && data[0] == reg && block_len < 32);
 107                         ret = i2c_master_send(client, block_data, block_len);
 108                         if (ret < 0)
 109                                 break;
 110                 }
 111         } else {
 112                 /* do some slow I2C emulation kind of thing */
 113                 while (len >= 2) {
 114                         reg = *data++;
 115                         ret = adv7175_write(sd, reg, *data++);
 116                         if (ret < 0)
 117                                 break;
 118                         len -= 2;
 119                 }
 120         }
 121
 122         return ret;
 123 }
 124
 125 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 126 {
 127         /* for some reason pass_through NTSC needs
 128          * a different sub-carrier freq to remain stable. */
 129         if (pass_through)
 130                 adv7175_write(sd, 0x02, 0x00);
 131         else
 132                 adv7175_write(sd, 0x02, 0x55);
 133
 134         adv7175_write(sd, 0x03, 0x55);
 135         adv7175_write(sd, 0x04, 0x55);
 136         adv7175_write(sd, 0x05, 0x25);
 137 }
 138
 139 /* ----------------------------------------------------------------------- */
 140 /* Output filter:  S-Video  Composite */
 141
 142 #define MR050       0x11        /* 0x09 */
 143 #define MR060       0x14        /* 0x0c */
 144
 145 /* ----------------------------------------------------------------------- */
 146
 147 #define TR0MODE     0x46
 148 #define TR0RST      0x80
 149
 150 #define TR1CAPT     0x80
 151 #define TR1PLAY     0x00
 152
 153 static const unsigned char init_common[] = {
 154
 155         0x00, MR050,            /* MR0, PAL enabled */
 156         0x01, 0x00,             /* MR1 */
 157         0x02, 0x0c,             /* subc. freq. */
 158         0x03, 0x8c,             /* subc. freq. */
 159         0x04, 0x79,             /* subc. freq. */
 160         0x05, 0x26,             /* subc. freq. */
 161         0x06, 0x40,             /* subc. phase */
 162
 163         0x07, TR0MODE,          /* TR0, 16bit */
 164         0x08, 0x21,             /*  */
 165         0x09, 0x00,             /*  */
 166         0x0a, 0x00,             /*  */
 167         0x0b, 0x00,             /*  */
 168         0x0c, TR1CAPT,          /* TR1 */
 169         0x0d, 0x4f,             /* MR2 */
 170         0x0e, 0x00,             /*  */
 171         0x0f, 0x00,             /*  */
 172         0x10, 0x00,             /*  */
 173         0x11, 0x00,             /*  */
 174 };
 175
 176 static const unsigned char init_pal[] = {
 177         0x00, MR050,            /* MR0, PAL enabled */
 178         0x01, 0x00,             /* MR1 */
 179         0x02, 0x0c,             /* subc. freq. */
 180         0x03, 0x8c,             /* subc. freq. */
 181         0x04, 0x79,             /* subc. freq. */
 182         0x05, 0x26,             /* subc. freq. */
 183         0x06, 0x40,             /* subc. phase */
 184 };
 185
 186 static const unsigned char init_ntsc[] = {
 187         0x00, MR060,            /* MR0, NTSC enabled */
 188         0x01, 0x00,             /* MR1 */
 189         0x02, 0x55,             /* subc. freq. */
 190         0x03, 0x55,             /* subc. freq. */
 191         0x04, 0x55,             /* subc. freq. */
 192         0x05, 0x25,             /* subc. freq. */
 193         0x06, 0x1a,             /* subc. phase */
 194 };
 195
 196 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 197 {
 198         /* This is just for testing!!! */
 199         adv7175_write_block(sd, init_common, sizeof(init_common));
 200         adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 201         adv7175_write(sd, 0x07, TR0MODE);
 202         return 0;
 203 }
 204
 205 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 206 {
 207         struct adv7175 *encoder = to_adv7175(sd);
 208
 209         if (std & V4L2_STD_NTSC) {
 210                 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 211                 if (encoder->input == 0)
 212                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 213                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 214                 adv7175_write(sd, 0x07, TR0MODE);
 215         } else if (std & V4L2_STD_PAL) {
 216                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 217                 if (encoder->input == 0)
 218                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 219                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 220                 adv7175_write(sd, 0x07, TR0MODE);
 221         } else if (std & V4L2_STD_SECAM) {
 222                 /* This is an attempt to convert
 223                  * SECAM->PAL (typically it does not work
 224                  * due to genlock: when decoder is in SECAM
 225                  * and encoder in in PAL the subcarrier can
 226                  * not be syncronized with horizontal
 227                  * quency) */
 228                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 229                 if (encoder->input == 0)
 230                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 231                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 232                 adv7175_write(sd, 0x07, TR0MODE);
 233         } else {
 234                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 235                                 (unsigned long long)std);
 236                 return -EINVAL;
 237         }
 238         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 239         encoder->norm = std;
 240         return 0;
 241 }
 242
 243 static int adv7175_s_routing(struct v4l2_subdev *sd,
 244                              u32 input, u32 output, u32 config)
 245 {
 246         struct adv7175 *encoder = to_adv7175(sd);
 247
 248         /* RJ: input = 0: input is from decoder
 249            input = 1: input is from ZR36060
 250            input = 2: color bar */
 251
 252         switch (input) {
 253         case 0:
 254                 adv7175_write(sd, 0x01, 0x00);
 255
 256                 if (encoder->norm & V4L2_STD_NTSC)
 257                         set_subcarrier_freq(sd, 1);
 258
 259                 adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 260                 if (encoder->norm & V4L2_STD_SECAM)
 261                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 262                 else
 263                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 264                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 265                 adv7175_write(sd, 0x07, TR0MODE);
 266                 /*udelay(10);*/
 267                 break;
 268
 269         case 1:
 270                 adv7175_write(sd, 0x01, 0x00);
 271
 272                 if (encoder->norm & V4L2_STD_NTSC)
 273                         set_subcarrier_freq(sd, 0);
 274
 275                 adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 276                 adv7175_write(sd, 0x0d, 0x49);
 277                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 278                 adv7175_write(sd, 0x07, TR0MODE);
 279                 /* udelay(10); */
 280                 break;
 281
 282         case 2:
 283                 adv7175_write(sd, 0x01, 0x80);
 284
 285                 if (encoder->norm & V4L2_STD_NTSC)
 286                         set_subcarrier_freq(sd, 0);
 287
 288                 adv7175_write(sd, 0x0d, 0x49);
 289                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 290                 adv7175_write(sd, 0x07, TR0MODE);
 291                 /* udelay(10); */
 292                 break;
 293
 294         default:
 295                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 296                 return -EINVAL;
 297         }
 298         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 299         encoder->input = input;
 300         return 0;
 301 }
 302
 303 static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
 304                 struct v4l2_subdev_pad_config *cfg,
 305                 struct v4l2_subdev_mbus_code_enum *code)
 306 {
 307         if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
 308                 return -EINVAL;
 309
 310         code->code = adv7175_codes[code->index];
 311         return 0;
 312 }
 313
 314 static int adv7175_get_fmt(struct v4l2_subdev *sd,
 315                 struct v4l2_subdev_pad_config *cfg,
 316                 struct v4l2_subdev_format *format)
 317 {
 318         struct v4l2_mbus_framefmt *mf = &format->format;
 319         u8 val = adv7175_read(sd, 0x7);
 320
 321         if (format->pad)
 322                 return -EINVAL;
 323
 324         if ((val & 0x40) == (1 << 6))
 325                 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 326         else
 327                 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 328
 329         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 330         mf->width       = 0;
 331         mf->height      = 0;
 332         mf->field       = V4L2_FIELD_ANY;
 333
 334         return 0;
 335 }
 336
 337 static int adv7175_set_fmt(struct v4l2_subdev *sd,
 338                 struct v4l2_subdev_pad_config *cfg,
 339                 struct v4l2_subdev_format *format)
 340 {
 341         struct v4l2_mbus_framefmt *mf = &format->format;
 342         u8 val = adv7175_read(sd, 0x7);
 343         int ret = 0;
 344
 345         if (format->pad)
 346                 return -EINVAL;
 347
 348         switch (mf->code) {
 349         case MEDIA_BUS_FMT_UYVY8_2X8:
 350                 val &= ~0x40;
 351                 break;
 352
 353         case MEDIA_BUS_FMT_UYVY8_1X16:
 354                 val |= 0x40;
 355                 break;
 356
 357         default:
 358                 v4l2_dbg(1, debug, sd,
 359                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 360                 return -EINVAL;
 361         }
 362
 363         if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 364                 ret = adv7175_write(sd, 0x7, val);
 365
 366         return ret;
 367 }
 368
 369 static int adv7175_s_power(struct v4l2_subdev *sd, int on)
 370 {
 371         if (on)
 372                 adv7175_write(sd, 0x01, 0x00);
 373         else
 374                 adv7175_write(sd, 0x01, 0x78);
 375
 376         return 0;
 377 }
 378
 379 /* ----------------------------------------------------------------------- */
 380
 381 static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 382         .init = adv7175_init,
 383         .s_power = adv7175_s_power,
 384 };
 385
 386 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 387         .s_std_output = adv7175_s_std_output,
 388         .s_routing = adv7175_s_routing,
 389 };
 390
 391 static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
 392         .enum_mbus_code = adv7175_enum_mbus_code,
 393         .get_fmt = adv7175_get_fmt,
 394         .set_fmt = adv7175_set_fmt,
 395 };
 396
 397 static const struct v4l2_subdev_ops adv7175_ops = {
 398         .core = &adv7175_core_ops,
 399         .video = &adv7175_video_ops,
 400         .pad = &adv7175_pad_ops,
 401 };
 402
 403 /* ----------------------------------------------------------------------- */
 404
 405 static int adv7175_probe(struct i2c_client *client,
 406                         const struct i2c_device_id *id)
 407 {
 408         int i;
 409         struct adv7175 *encoder;
 410         struct v4l2_subdev *sd;
 411
 412         /* Check if the adapter supports the needed features */
 413         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 414                 return -ENODEV;
 415
 416         v4l_info(client, "chip found @ 0x%x (%s)\n",
 417                         client->addr << 1, client->adapter->name);
 418
 419         encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 420         if (encoder == NULL)
 421                 return -ENOMEM;
 422         sd = &encoder->sd;
 423         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 424         encoder->norm = V4L2_STD_NTSC;
 425         encoder->input = 0;
 426
 427         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 428         if (i >= 0) {
 429                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 430                 i = adv7175_write(sd, 0x07, TR0MODE);
 431                 i = adv7175_read(sd, 0x12);
 432                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 433         }
 434         if (i < 0)
 435                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 436         return 0;
 437 }
 438
 439 static int adv7175_remove(struct i2c_client *client)
 440 {
 441         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 442
 443         v4l2_device_unregister_subdev(sd);
 444         return 0;
 445 }
 446
 447 /* ----------------------------------------------------------------------- */
 448
 449 static const struct i2c_device_id adv7175_id[] = {
 450         { "adv7175", 0 },
 451         { "adv7176", 0 },
 452         { }
 453 };
 454 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 455
 456 static struct i2c_driver adv7175_driver = {
 457         .driver = {
 458                 .name   = "adv7175",
 459         },
 460         .probe          = adv7175_probe,
 461         .remove         = adv7175_remove,
 462         .id_table       = adv7175_id,
 463 };
 464
 465 module_i2c_driver(adv7175_driver);