drivers/media/i2c/sony-btf-mpx.c

   1 /*
   2  * Copyright (C) 2005-2006 Micronas USA Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License (Version 2) as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/i2c.h>
  21 #include <linux/videodev2.h>
  22 #include <media/tuner.h>
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-device.h>
  26 #include <linux/slab.h>
  27
  28 MODULE_DESCRIPTION("sony-btf-mpx driver");
  29 MODULE_LICENSE("GPL v2");
  30
  31 static int debug;
  32 module_param(debug, int, 0644);
  33 MODULE_PARM_DESC(debug, "debug level 0=off(default) 1=on");
  34
  35 /* #define MPX_DEBUG */
  36
  37 /*
  38  * Note:
  39  *
  40  * AS(IF/MPX) pin:      LOW      HIGH/OPEN
  41  * IF/MPX address:   0x42/0x40   0x43/0x44
  42  */
  43
  44
  45 static int force_mpx_mode = -1;
  46 module_param(force_mpx_mode, int, 0644);
  47
  48 struct sony_btf_mpx {
  49         struct v4l2_subdev sd;
  50         int mpxmode;
  51         u32 audmode;
  52 };
  53
  54 static inline struct sony_btf_mpx *to_state(struct v4l2_subdev *sd)
  55 {
  56         return container_of(sd, struct sony_btf_mpx, sd);
  57 }
  58
  59 static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
  60 {
  61         u8 buffer[5];
  62         struct i2c_msg msg;
  63
  64         buffer[0] = dev;
  65         buffer[1] = addr >> 8;
  66         buffer[2] = addr & 0xff;
  67         buffer[3] = val >> 8;
  68         buffer[4] = val & 0xff;
  69         msg.addr = client->addr;
  70         msg.flags = 0;
  71         msg.len = 5;
  72         msg.buf = buffer;
  73         i2c_transfer(client->adapter, &msg, 1);
  74         return 0;
  75 }
  76
  77 /*
  78  * MPX register values for the BTF-PG472Z:
  79  *
  80  *                                 FM_     NICAM_  SCART_
  81  *          MODUS  SOURCE    ACB   PRESCAL PRESCAL PRESCAL SYSTEM  VOLUME
  82  *         10/0030 12/0008 12/0013 12/000E 12/0010 12/0000 10/0020 12/0000
  83  *         ---------------------------------------------------------------
  84  * Auto     1003    0020    0100    2603    5000    XXXX    0001    7500
  85  *
  86  * B/G
  87  *  Mono    1003    0020    0100    2603    5000    XXXX    0003    7500
  88  *  A2      1003    0020    0100    2601    5000    XXXX    0003    7500
  89  *  NICAM   1003    0120    0100    2603    5000    XXXX    0008    7500
  90  *
  91  * I
  92  *  Mono    1003    0020    0100    2603    7900    XXXX    000A    7500
  93  *  NICAM   1003    0120    0100    2603    7900    XXXX    000A    7500
  94  *
  95  * D/K
  96  *  Mono    1003    0020    0100    2603    5000    XXXX    0004    7500
  97  *  A2-1    1003    0020    0100    2601    5000    XXXX    0004    7500
  98  *  A2-2    1003    0020    0100    2601    5000    XXXX    0005    7500
  99  *  A2-3    1003    0020    0100    2601    5000    XXXX    0007    7500
 100  *  NICAM   1003    0120    0100    2603    5000    XXXX    000B    7500
 101  *
 102  * L/L'
 103  *  Mono    0003    0200    0100    7C03    5000    2200    0009    7500
 104  *  NICAM   0003    0120    0100    7C03    5000    XXXX    0009    7500
 105  *
 106  * M
 107  *  Mono    1003    0200    0100    2B03    5000    2B00    0002    7500
 108  *
 109  * For Asia, replace the 0x26XX in FM_PRESCALE with 0x14XX.
 110  *
 111  * Bilingual selection in A2/NICAM:
 112  *
 113  *         High byte of SOURCE     Left chan   Right chan
 114  *                 0x01              MAIN         SUB
 115  *                 0x03              MAIN         MAIN
 116  *                 0x04              SUB          SUB
 117  *
 118  * Force mono in NICAM by setting the high byte of SOURCE to 0x02 (L/L') or
 119  * 0x00 (all other bands).  Force mono in A2 with FMONO_A2:
 120  *
 121  *                      FMONO_A2
 122  *                      10/0022
 123  *                      --------
 124  *     Forced mono ON     07F0
 125  *     Forced mono OFF    0190
 126  */
 127
 128 static const struct {
 129         enum { AUD_MONO, AUD_A2, AUD_NICAM, AUD_NICAM_L } audio_mode;
 130         u16 modus;
 131         u16 source;
 132         u16 acb;
 133         u16 fm_prescale;
 134         u16 nicam_prescale;
 135         u16 scart_prescale;
 136         u16 system;
 137         u16 volume;
 138 } mpx_audio_modes[] = {
 139         /* Auto */      { AUD_MONO,     0x1003, 0x0020, 0x0100, 0x2603,
 140                                         0x5000, 0x0000, 0x0001, 0x7500 },
 141         /* B/G Mono */  { AUD_MONO,     0x1003, 0x0020, 0x0100, 0x2603,
 142                                         0x5000, 0x0000, 0x0003, 0x7500 },
 143         /* B/G A2 */    { AUD_A2,       0x1003, 0x0020, 0x0100, 0x2601,
 144                                         0x5000, 0x0000, 0x0003, 0x7500 },
 145         /* B/G NICAM */ { AUD_NICAM,    0x1003, 0x0120, 0x0100, 0x2603,
 146                                         0x5000, 0x0000, 0x0008, 0x7500 },
 147         /* I Mono */    { AUD_MONO,     0x1003, 0x0020, 0x0100, 0x2603,
 148                                         0x7900, 0x0000, 0x000A, 0x7500 },
 149         /* I NICAM */   { AUD_NICAM,    0x1003, 0x0120, 0x0100, 0x2603,
 150                                         0x7900, 0x0000, 0x000A, 0x7500 },
 151         /* D/K Mono */  { AUD_MONO,     0x1003, 0x0020, 0x0100, 0x2603,
 152                                         0x5000, 0x0000, 0x0004, 0x7500 },
 153         /* D/K A2-1 */  { AUD_A2,       0x1003, 0x0020, 0x0100, 0x2601,
 154                                         0x5000, 0x0000, 0x0004, 0x7500 },
 155         /* D/K A2-2 */  { AUD_A2,       0x1003, 0x0020, 0x0100, 0x2601,
 156                                         0x5000, 0x0000, 0x0005, 0x7500 },
 157         /* D/K A2-3 */  { AUD_A2,       0x1003, 0x0020, 0x0100, 0x2601,
 158                                         0x5000, 0x0000, 0x0007, 0x7500 },
 159         /* D/K NICAM */ { AUD_NICAM,    0x1003, 0x0120, 0x0100, 0x2603,
 160                                         0x5000, 0x0000, 0x000B, 0x7500 },
 161         /* L/L' Mono */ { AUD_MONO,     0x0003, 0x0200, 0x0100, 0x7C03,
 162                                         0x5000, 0x2200, 0x0009, 0x7500 },
 163         /* L/L' NICAM */{ AUD_NICAM_L,  0x0003, 0x0120, 0x0100, 0x7C03,
 164                                         0x5000, 0x0000, 0x0009, 0x7500 },
 165 };
 166
 167 #define MPX_NUM_MODES   ARRAY_SIZE(mpx_audio_modes)
 168
 169 static int mpx_setup(struct sony_btf_mpx *t)
 170 {
 171         struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
 172         u16 source = 0;
 173         u8 buffer[3];
 174         struct i2c_msg msg;
 175         int mode = t->mpxmode;
 176
 177         /* reset MPX */
 178         buffer[0] = 0x00;
 179         buffer[1] = 0x80;
 180         buffer[2] = 0x00;
 181         msg.addr = client->addr;
 182         msg.flags = 0;
 183         msg.len = 3;
 184         msg.buf = buffer;
 185         i2c_transfer(client->adapter, &msg, 1);
 186         buffer[1] = 0x00;
 187         i2c_transfer(client->adapter, &msg, 1);
 188
 189         if (t->audmode != V4L2_TUNER_MODE_MONO)
 190                 mode++;
 191
 192         if (mpx_audio_modes[mode].audio_mode != AUD_MONO) {
 193                 switch (t->audmode) {
 194                 case V4L2_TUNER_MODE_MONO:
 195                         switch (mpx_audio_modes[mode].audio_mode) {
 196                         case AUD_A2:
 197                                 source = mpx_audio_modes[mode].source;
 198                                 break;
 199                         case AUD_NICAM:
 200                                 source = 0x0000;
 201                                 break;
 202                         case AUD_NICAM_L:
 203                                 source = 0x0200;
 204                                 break;
 205                         default:
 206                                 break;
 207                         }
 208                         break;
 209                 case V4L2_TUNER_MODE_STEREO:
 210                         source = mpx_audio_modes[mode].source;
 211                         break;
 212                 case V4L2_TUNER_MODE_LANG1:
 213                         source = 0x0300;
 214                         break;
 215                 case V4L2_TUNER_MODE_LANG2:
 216                         source = 0x0400;
 217                         break;
 218                 }
 219                 source |= mpx_audio_modes[mode].source & 0x00ff;
 220         } else
 221                 source = mpx_audio_modes[mode].source;
 222
 223         mpx_write(client, 0x10, 0x0030, mpx_audio_modes[mode].modus);
 224         mpx_write(client, 0x12, 0x0008, source);
 225         mpx_write(client, 0x12, 0x0013, mpx_audio_modes[mode].acb);
 226         mpx_write(client, 0x12, 0x000e,
 227                         mpx_audio_modes[mode].fm_prescale);
 228         mpx_write(client, 0x12, 0x0010,
 229                         mpx_audio_modes[mode].nicam_prescale);
 230         mpx_write(client, 0x12, 0x000d,
 231                         mpx_audio_modes[mode].scart_prescale);
 232         mpx_write(client, 0x10, 0x0020, mpx_audio_modes[mode].system);
 233         mpx_write(client, 0x12, 0x0000, mpx_audio_modes[mode].volume);
 234         if (mpx_audio_modes[mode].audio_mode == AUD_A2)
 235                 mpx_write(client, 0x10, 0x0022,
 236                         t->audmode == V4L2_TUNER_MODE_MONO ? 0x07f0 : 0x0190);
 237
 238 #ifdef MPX_DEBUG
 239         {
 240                 u8 buf1[3], buf2[2];
 241                 struct i2c_msg msgs[2];
 242
 243                 v4l2_info(client,
 244                         "MPX registers: %04x %04x %04x %04x %04x %04x %04x %04x\n",
 245                         mpx_audio_modes[mode].modus,
 246                         source,
 247                         mpx_audio_modes[mode].acb,
 248                         mpx_audio_modes[mode].fm_prescale,
 249                         mpx_audio_modes[mode].nicam_prescale,
 250                         mpx_audio_modes[mode].scart_prescale,
 251                         mpx_audio_modes[mode].system,
 252                         mpx_audio_modes[mode].volume);
 253                 buf1[0] = 0x11;
 254                 buf1[1] = 0x00;
 255                 buf1[2] = 0x7e;
 256                 msgs[0].addr = client->addr;
 257                 msgs[0].flags = 0;
 258                 msgs[0].len = 3;
 259                 msgs[0].buf = buf1;
 260                 msgs[1].addr = client->addr;
 261                 msgs[1].flags = I2C_M_RD;
 262                 msgs[1].len = 2;
 263                 msgs[1].buf = buf2;
 264                 i2c_transfer(client->adapter, msgs, 2);
 265                 v4l2_info(client, "MPX system: %02x%02x\n",
 266                                 buf2[0], buf2[1]);
 267                 buf1[0] = 0x11;
 268                 buf1[1] = 0x02;
 269                 buf1[2] = 0x00;
 270                 i2c_transfer(client->adapter, msgs, 2);
 271                 v4l2_info(client, "MPX status: %02x%02x\n",
 272                                 buf2[0], buf2[1]);
 273         }
 274 #endif
 275         return 0;
 276 }
 277
 278
 279 static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 280 {
 281         struct sony_btf_mpx *t = to_state(sd);
 282         int default_mpx_mode = 0;
 283
 284         if (std & V4L2_STD_PAL_BG)
 285                 default_mpx_mode = 1;
 286         else if (std & V4L2_STD_PAL_I)
 287                 default_mpx_mode = 4;
 288         else if (std & V4L2_STD_PAL_DK)
 289                 default_mpx_mode = 6;
 290         else if (std & V4L2_STD_SECAM_L)
 291                 default_mpx_mode = 11;
 292
 293         if (default_mpx_mode != t->mpxmode) {
 294                 t->mpxmode = default_mpx_mode;
 295                 mpx_setup(t);
 296         }
 297         return 0;
 298 }
 299
 300 static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
 301 {
 302         struct sony_btf_mpx *t = to_state(sd);
 303
 304         vt->capability = V4L2_TUNER_CAP_NORM |
 305                 V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
 306                 V4L2_TUNER_CAP_LANG2;
 307         vt->rxsubchans = V4L2_TUNER_SUB_MONO |
 308                 V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_LANG1 |
 309                 V4L2_TUNER_SUB_LANG2;
 310         vt->audmode = t->audmode;
 311         return 0;
 312 }
 313
 314 static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
 315 {
 316         struct sony_btf_mpx *t = to_state(sd);
 317
 318         if (vt->type != V4L2_TUNER_ANALOG_TV)
 319                 return -EINVAL;
 320
 321         if (vt->audmode != t->audmode) {
 322                 t->audmode = vt->audmode;
 323                 mpx_setup(t);
 324         }
 325         return 0;
 326 }
 327
 328 /* --------------------------------------------------------------------------*/
 329
 330 static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = {
 331         .s_tuner = sony_btf_mpx_s_tuner,
 332         .g_tuner = sony_btf_mpx_g_tuner,
 333 };
 334
 335 static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = {
 336         .s_std = sony_btf_mpx_s_std,
 337 };
 338
 339 static const struct v4l2_subdev_ops sony_btf_mpx_ops = {
 340         .tuner = &sony_btf_mpx_tuner_ops,
 341         .video = &sony_btf_mpx_video_ops,
 342 };
 343
 344 /* --------------------------------------------------------------------------*/
 345
 346 static int sony_btf_mpx_probe(struct i2c_client *client,
 347                                 const struct i2c_device_id *id)
 348 {
 349         struct sony_btf_mpx *t;
 350         struct v4l2_subdev *sd;
 351
 352         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
 353                 return -ENODEV;
 354
 355         v4l_info(client, "chip found @ 0x%x (%s)\n",
 356                         client->addr << 1, client->adapter->name);
 357
 358         t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
 359         if (t == NULL)
 360                 return -ENOMEM;
 361
 362         sd = &t->sd;
 363         v4l2_i2c_subdev_init(sd, client, &sony_btf_mpx_ops);
 364
 365         /* Initialize sony_btf_mpx */
 366         t->mpxmode = 0;
 367         t->audmode = V4L2_TUNER_MODE_STEREO;
 368
 369         return 0;
 370 }
 371
 372 static int sony_btf_mpx_remove(struct i2c_client *client)
 373 {
 374         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 375
 376         v4l2_device_unregister_subdev(sd);
 377
 378         return 0;
 379 }
 380
 381 /* ----------------------------------------------------------------------- */
 382
 383 static const struct i2c_device_id sony_btf_mpx_id[] = {
 384         { "sony-btf-mpx", 0 },
 385         { }
 386 };
 387 MODULE_DEVICE_TABLE(i2c, sony_btf_mpx_id);
 388
 389 static struct i2c_driver sony_btf_mpx_driver = {
 390         .driver = {
 391                 .name   = "sony-btf-mpx",
 392         },
 393         .probe = sony_btf_mpx_probe,
 394         .remove = sony_btf_mpx_remove,
 395         .id_table = sony_btf_mpx_id,
 396 };
 397 module_i2c_driver(sony_btf_mpx_driver);