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 <asm/uaccess.h>
  32 #include <linux/i2c.h>
  33 #include <linux/videodev2.h>
  34 #include <media/v4l2-device.h>
  35 #include <media/v4l2-chip-ident.h>
  36
  37 MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  38 MODULE_AUTHOR("Dave Perks");
  39 MODULE_LICENSE("GPL");
  40
  41 #define   I2C_ADV7175        0xd4
  42 #define   I2C_ADV7176        0x54
  43
  44
  45 static int debug;
  46 module_param(debug, int, 0);
  47 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  48
  49 /* ----------------------------------------------------------------------- */
  50
  51 struct adv7175 {
  52         struct v4l2_subdev sd;
  53         v4l2_std_id norm;
  54         int input;
  55 };
  56
  57 static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  58 {
  59         return container_of(sd, struct adv7175, sd);
  60 }
  61
  62 static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  63
  64 static enum v4l2_mbus_pixelcode adv7175_codes[] = {
  65         V4L2_MBUS_FMT_UYVY8_2X8,
  66         V4L2_MBUS_FMT_UYVY8_1X16,
  67 };
  68
  69 /* ----------------------------------------------------------------------- */
  70
  71 static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  72 {
  73         struct i2c_client *client = v4l2_get_subdevdata(sd);
  74
  75         return i2c_smbus_write_byte_data(client, reg, value);
  76 }
  77
  78 static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  79 {
  80         struct i2c_client *client = v4l2_get_subdevdata(sd);
  81
  82         return i2c_smbus_read_byte_data(client, reg);
  83 }
  84
  85 static int adv7175_write_block(struct v4l2_subdev *sd,
  86                      const u8 *data, unsigned int len)
  87 {
  88         struct i2c_client *client = v4l2_get_subdevdata(sd);
  89         int ret = -1;
  90         u8 reg;
  91
  92         /* the adv7175 has an autoincrement function, use it if
  93          * the adapter understands raw I2C */
  94         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  95                 /* do raw I2C, not smbus compatible */
  96                 u8 block_data[32];
  97                 int block_len;
  98
  99                 while (len >= 2) {
 100                         block_len = 0;
 101                         block_data[block_len++] = reg = data[0];
 102                         do {
 103                                 block_data[block_len++] = data[1];
 104                                 reg++;
 105                                 len -= 2;
 106                                 data += 2;
 107                         } while (len >= 2 && data[0] == reg && block_len < 32);
 108                         ret = i2c_master_send(client, block_data, block_len);
 109                         if (ret < 0)
 110                                 break;
 111                 }
 112         } else {
 113                 /* do some slow I2C emulation kind of thing */
 114                 while (len >= 2) {
 115                         reg = *data++;
 116                         ret = adv7175_write(sd, reg, *data++);
 117                         if (ret < 0)
 118                                 break;
 119                         len -= 2;
 120                 }
 121         }
 122
 123         return ret;
 124 }
 125
 126 static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 127 {
 128         /* for some reason pass_through NTSC needs
 129          * a different sub-carrier freq to remain stable. */
 130         if (pass_through)
 131                 adv7175_write(sd, 0x02, 0x00);
 132         else
 133                 adv7175_write(sd, 0x02, 0x55);
 134
 135         adv7175_write(sd, 0x03, 0x55);
 136         adv7175_write(sd, 0x04, 0x55);
 137         adv7175_write(sd, 0x05, 0x25);
 138 }
 139
 140 /* ----------------------------------------------------------------------- */
 141 /* Output filter:  S-Video  Composite */
 142
 143 #define MR050       0x11        /* 0x09 */
 144 #define MR060       0x14        /* 0x0c */
 145
 146 /* ----------------------------------------------------------------------- */
 147
 148 #define TR0MODE     0x46
 149 #define TR0RST      0x80
 150
 151 #define TR1CAPT     0x80
 152 #define TR1PLAY     0x00
 153
 154 static const unsigned char init_common[] = {
 155
 156         0x00, MR050,            /* MR0, PAL enabled */
 157         0x01, 0x00,             /* MR1 */
 158         0x02, 0x0c,             /* subc. freq. */
 159         0x03, 0x8c,             /* subc. freq. */
 160         0x04, 0x79,             /* subc. freq. */
 161         0x05, 0x26,             /* subc. freq. */
 162         0x06, 0x40,             /* subc. phase */
 163
 164         0x07, TR0MODE,          /* TR0, 16bit */
 165         0x08, 0x21,             /*  */
 166         0x09, 0x00,             /*  */
 167         0x0a, 0x00,             /*  */
 168         0x0b, 0x00,             /*  */
 169         0x0c, TR1CAPT,          /* TR1 */
 170         0x0d, 0x4f,             /* MR2 */
 171         0x0e, 0x00,             /*  */
 172         0x0f, 0x00,             /*  */
 173         0x10, 0x00,             /*  */
 174         0x11, 0x00,             /*  */
 175 };
 176
 177 static const unsigned char init_pal[] = {
 178         0x00, MR050,            /* MR0, PAL enabled */
 179         0x01, 0x00,             /* MR1 */
 180         0x02, 0x0c,             /* subc. freq. */
 181         0x03, 0x8c,             /* subc. freq. */
 182         0x04, 0x79,             /* subc. freq. */
 183         0x05, 0x26,             /* subc. freq. */
 184         0x06, 0x40,             /* subc. phase */
 185 };
 186
 187 static const unsigned char init_ntsc[] = {
 188         0x00, MR060,            /* MR0, NTSC enabled */
 189         0x01, 0x00,             /* MR1 */
 190         0x02, 0x55,             /* subc. freq. */
 191         0x03, 0x55,             /* subc. freq. */
 192         0x04, 0x55,             /* subc. freq. */
 193         0x05, 0x25,             /* subc. freq. */
 194         0x06, 0x1a,             /* subc. phase */
 195 };
 196
 197 static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 198 {
 199         /* This is just for testing!!! */
 200         adv7175_write_block(sd, init_common, sizeof(init_common));
 201         adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 202         adv7175_write(sd, 0x07, TR0MODE);
 203         return 0;
 204 }
 205
 206 static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 207 {
 208         struct adv7175 *encoder = to_adv7175(sd);
 209
 210         if (std & V4L2_STD_NTSC) {
 211                 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 212                 if (encoder->input == 0)
 213                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 214                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 215                 adv7175_write(sd, 0x07, TR0MODE);
 216         } else if (std & V4L2_STD_PAL) {
 217                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 218                 if (encoder->input == 0)
 219                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 220                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 221                 adv7175_write(sd, 0x07, TR0MODE);
 222         } else if (std & V4L2_STD_SECAM) {
 223                 /* This is an attempt to convert
 224                  * SECAM->PAL (typically it does not work
 225                  * due to genlock: when decoder is in SECAM
 226                  * and encoder in in PAL the subcarrier can
 227                  * not be syncronized with horizontal
 228                  * quency) */
 229                 adv7175_write_block(sd, init_pal, sizeof(init_pal));
 230                 if (encoder->input == 0)
 231                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 232                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 233                 adv7175_write(sd, 0x07, TR0MODE);
 234         } else {
 235                 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 236                                 (unsigned long long)std);
 237                 return -EINVAL;
 238         }
 239         v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 240         encoder->norm = std;
 241         return 0;
 242 }
 243
 244 static int adv7175_s_routing(struct v4l2_subdev *sd,
 245                              u32 input, u32 output, u32 config)
 246 {
 247         struct adv7175 *encoder = to_adv7175(sd);
 248
 249         /* RJ: input = 0: input is from decoder
 250            input = 1: input is from ZR36060
 251            input = 2: color bar */
 252
 253         switch (input) {
 254         case 0:
 255                 adv7175_write(sd, 0x01, 0x00);
 256
 257                 if (encoder->norm & V4L2_STD_NTSC)
 258                         set_subcarrier_freq(sd, 1);
 259
 260                 adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 261                 if (encoder->norm & V4L2_STD_SECAM)
 262                         adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 263                 else
 264                         adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 265                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 266                 adv7175_write(sd, 0x07, TR0MODE);
 267                 /*udelay(10);*/
 268                 break;
 269
 270         case 1:
 271                 adv7175_write(sd, 0x01, 0x00);
 272
 273                 if (encoder->norm & V4L2_STD_NTSC)
 274                         set_subcarrier_freq(sd, 0);
 275
 276                 adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 277                 adv7175_write(sd, 0x0d, 0x49);
 278                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 279                 adv7175_write(sd, 0x07, TR0MODE);
 280                 /* udelay(10); */
 281                 break;
 282
 283         case 2:
 284                 adv7175_write(sd, 0x01, 0x80);
 285
 286                 if (encoder->norm & V4L2_STD_NTSC)
 287                         set_subcarrier_freq(sd, 0);
 288
 289                 adv7175_write(sd, 0x0d, 0x49);
 290                 adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 291                 adv7175_write(sd, 0x07, TR0MODE);
 292                 /* udelay(10); */
 293                 break;
 294
 295         default:
 296                 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 297                 return -EINVAL;
 298         }
 299         v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 300         encoder->input = input;
 301         return 0;
 302 }
 303
 304 static int adv7175_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 305                                 enum v4l2_mbus_pixelcode *code)
 306 {
 307         if (index >= ARRAY_SIZE(adv7175_codes))
 308                 return -EINVAL;
 309
 310         *code = adv7175_codes[index];
 311         return 0;
 312 }
 313
 314 static int adv7175_g_fmt(struct v4l2_subdev *sd,
 315                                 struct v4l2_mbus_framefmt *mf)
 316 {
 317         u8 val = adv7175_read(sd, 0x7);
 318
 319         if ((val & 0x40) == (1 << 6))
 320                 mf->code = V4L2_MBUS_FMT_UYVY8_1X16;
 321         else
 322                 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
 323
 324         mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 325         mf->width       = 0;
 326         mf->height      = 0;
 327         mf->field       = V4L2_FIELD_ANY;
 328
 329         return 0;
 330 }
 331
 332 static int adv7175_s_fmt(struct v4l2_subdev *sd,
 333                                 struct v4l2_mbus_framefmt *mf)
 334 {
 335         u8 val = adv7175_read(sd, 0x7);
 336         int ret;
 337
 338         switch (mf->code) {
 339         case V4L2_MBUS_FMT_UYVY8_2X8:
 340                 val &= ~0x40;
 341                 break;
 342
 343         case V4L2_MBUS_FMT_UYVY8_1X16:
 344                 val |= 0x40;
 345                 break;
 346
 347         default:
 348                 v4l2_dbg(1, debug, sd,
 349                         "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 350                 return -EINVAL;
 351         }
 352
 353         ret = adv7175_write(sd, 0x7, val);
 354
 355         return ret;
 356 }
 357
 358 static int adv7175_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 359 {
 360         struct i2c_client *client = v4l2_get_subdevdata(sd);
 361
 362         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_ADV7175, 0);
 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         .g_chip_ident = adv7175_g_chip_ident,
 379         .init = adv7175_init,
 380         .s_power = adv7175_s_power,
 381 };
 382
 383 static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 384         .s_std_output = adv7175_s_std_output,
 385         .s_routing = adv7175_s_routing,
 386         .s_mbus_fmt = adv7175_s_fmt,
 387         .g_mbus_fmt = adv7175_g_fmt,
 388         .enum_mbus_fmt  = adv7175_enum_fmt,
 389 };
 390
 391 static const struct v4l2_subdev_ops adv7175_ops = {
 392         .core = &adv7175_core_ops,
 393         .video = &adv7175_video_ops,
 394 };
 395
 396 /* ----------------------------------------------------------------------- */
 397
 398 static int adv7175_probe(struct i2c_client *client,
 399                         const struct i2c_device_id *id)
 400 {
 401         int i;
 402         struct adv7175 *encoder;
 403         struct v4l2_subdev *sd;
 404
 405         /* Check if the adapter supports the needed features */
 406         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 407                 return -ENODEV;
 408
 409         v4l_info(client, "chip found @ 0x%x (%s)\n",
 410                         client->addr << 1, client->adapter->name);
 411
 412         encoder = kzalloc(sizeof(struct adv7175), GFP_KERNEL);
 413         if (encoder == NULL)
 414                 return -ENOMEM;
 415         sd = &encoder->sd;
 416         v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 417         encoder->norm = V4L2_STD_NTSC;
 418         encoder->input = 0;
 419
 420         i = adv7175_write_block(sd, init_common, sizeof(init_common));
 421         if (i >= 0) {
 422                 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 423                 i = adv7175_write(sd, 0x07, TR0MODE);
 424                 i = adv7175_read(sd, 0x12);
 425                 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 426         }
 427         if (i < 0)
 428                 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 429         return 0;
 430 }
 431
 432 static int adv7175_remove(struct i2c_client *client)
 433 {
 434         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 435
 436         v4l2_device_unregister_subdev(sd);
 437         kfree(to_adv7175(sd));
 438         return 0;
 439 }
 440
 441 /* ----------------------------------------------------------------------- */
 442
 443 static const struct i2c_device_id adv7175_id[] = {
 444         { "adv7175", 0 },
 445         { "adv7176", 0 },
 446         { }
 447 };
 448 MODULE_DEVICE_TABLE(i2c, adv7175_id);
 449
 450 static struct i2c_driver adv7175_driver = {
 451         .driver = {
 452                 .owner  = THIS_MODULE,
 453                 .name   = "adv7175",
 454         },
 455         .probe          = adv7175_probe,
 456         .remove         = adv7175_remove,
 457         .id_table       = adv7175_id,
 458 };
 459
 460 module_i2c_driver(adv7175_driver);