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