drivers/media/video/cx25840/cx25840-audio.c

   1 /* cx25840 audio functions
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License
   5  * as published by the Free Software Foundation; either version 2
   6  * of the License, or (at your option) any later version.
   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
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16  */
  17
  18
  19 #include <linux/videodev2.h>
  20 #include <linux/i2c.h>
  21 #include <media/v4l2-common.h>
  22 #include <media/cx25840.h>
  23
  24 #include "cx25840-core.h"
  25
  26 static int set_audclk_freq(struct i2c_client *client, u32 freq)
  27 {
  28         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
  29
  30         if (freq != 32000 && freq != 44100 && freq != 48000)
  31                 return -EINVAL;
  32
  33         /* common for all inputs and rates */
  34         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  35         if (!state->is_cx23885 && !state->is_cx231xx)
  36                 cx25840_write(client, 0x127, 0x50);
  37
  38         if (state->aud_input != CX25840_AUDIO_SERIAL) {
  39                 switch (freq) {
  40                 case 32000:
  41                         if (state->is_cx23885) {
  42                                 /* We don't have register values
  43                                  * so avoid destroying registers. */
  44                                 break;
  45                         }
  46
  47                         if (!state->is_cx231xx) {
  48                                 /* VID_PLL and AUX_PLL */
  49                                 cx25840_write4(client, 0x108, 0x1006040f);
  50
  51                                 /* AUX_PLL_FRAC */
  52                                 cx25840_write4(client, 0x110, 0x01bb39ee);
  53                         }
  54
  55                         if (state->is_cx25836)
  56                                 break;
  57
  58                         /* src3/4/6_ctl = 0x0801f77f */
  59                         cx25840_write4(client, 0x900, 0x0801f77f);
  60                         cx25840_write4(client, 0x904, 0x0801f77f);
  61                         cx25840_write4(client, 0x90c, 0x0801f77f);
  62                         break;
  63
  64                 case 44100:
  65                         if (state->is_cx23885) {
  66                                 /* We don't have register values
  67                                  * so avoid destroying registers. */
  68                                 break;
  69                         }
  70
  71                         if (!state->is_cx231xx) {
  72                                 /* VID_PLL and AUX_PLL */
  73                                 cx25840_write4(client, 0x108, 0x1009040f);
  74
  75                                 /* AUX_PLL_FRAC */
  76                                 cx25840_write4(client, 0x110, 0x00ec6bd6);
  77                         }
  78
  79                         if (state->is_cx25836)
  80                                 break;
  81
  82                         /* src3/4/6_ctl = 0x08016d59 */
  83                         cx25840_write4(client, 0x900, 0x08016d59);
  84                         cx25840_write4(client, 0x904, 0x08016d59);
  85                         cx25840_write4(client, 0x90c, 0x08016d59);
  86                         break;
  87
  88                 case 48000:
  89                         if (state->is_cx23885) {
  90                                 /* We don't have register values
  91                                  * so avoid destroying registers. */
  92                                 break;
  93                         }
  94
  95                         if (!state->is_cx231xx) {
  96                                 /* VID_PLL and AUX_PLL */
  97                                 cx25840_write4(client, 0x108, 0x100a040f);
  98
  99                                 /* AUX_PLL_FRAC */
 100                                 cx25840_write4(client, 0x110, 0x0098d6e5);
 101                         }
 102
 103                         if (state->is_cx25836)
 104                                 break;
 105
 106                         /* src3/4/6_ctl = 0x08014faa */
 107                         cx25840_write4(client, 0x900, 0x08014faa);
 108                         cx25840_write4(client, 0x904, 0x08014faa);
 109                         cx25840_write4(client, 0x90c, 0x08014faa);
 110                         break;
 111                 }
 112         } else {
 113                 switch (freq) {
 114                 case 32000:
 115                         if (state->is_cx23885) {
 116                                 /* We don't have register values
 117                                  * so avoid destroying registers. */
 118                                 break;
 119                         }
 120
 121                         if (!state->is_cx231xx) {
 122                                 /* VID_PLL and AUX_PLL */
 123                                 cx25840_write4(client, 0x108, 0x1e08040f);
 124
 125                                 /* AUX_PLL_FRAC */
 126                                 cx25840_write4(client, 0x110, 0x012a0869);
 127                         }
 128
 129                         if (state->is_cx25836)
 130                                 break;
 131
 132                         /* src1_ctl = 0x08010000 */
 133                         cx25840_write4(client, 0x8f8, 0x08010000);
 134
 135                         /* src3/4/6_ctl = 0x08020000 */
 136                         cx25840_write4(client, 0x900, 0x08020000);
 137                         cx25840_write4(client, 0x904, 0x08020000);
 138                         cx25840_write4(client, 0x90c, 0x08020000);
 139
 140                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 141                         cx25840_write(client, 0x127, 0x54);
 142                         break;
 143
 144                 case 44100:
 145                         if (state->is_cx23885) {
 146                                 /* We don't have register values
 147                                  * so avoid destroying registers. */
 148                                 break;
 149                         }
 150
 151
 152                         if (!state->is_cx231xx) {
 153                                 /* VID_PLL and AUX_PLL */
 154                                 cx25840_write4(client, 0x108, 0x1809040f);
 155
 156                                 /* AUX_PLL_FRAC */
 157                                 cx25840_write4(client, 0x110, 0x00ec6bd6);
 158                         }
 159
 160                         if (state->is_cx25836)
 161                                 break;
 162
 163                         /* src1_ctl = 0x08010000 */
 164                         cx25840_write4(client, 0x8f8, 0x080160cd);
 165
 166                         /* src3/4/6_ctl = 0x08020000 */
 167                         cx25840_write4(client, 0x900, 0x08017385);
 168                         cx25840_write4(client, 0x904, 0x08017385);
 169                         cx25840_write4(client, 0x90c, 0x08017385);
 170                         break;
 171
 172                 case 48000:
 173                         if (!state->is_cx23885 && !state->is_cx231xx) {
 174                                 /* VID_PLL and AUX_PLL */
 175                                 cx25840_write4(client, 0x108, 0x180a040f);
 176
 177                                 /* AUX_PLL_FRAC */
 178                                 cx25840_write4(client, 0x110, 0x0098d6e5);
 179                         }
 180
 181                         if (state->is_cx25836)
 182                                 break;
 183
 184                         if (!state->is_cx23885 && !state->is_cx231xx) {
 185                                 /* src1_ctl */
 186                                 cx25840_write4(client, 0x8f8, 0x08018000);
 187
 188                                 /* src3/4/6_ctl */
 189                                 cx25840_write4(client, 0x900, 0x08015555);
 190                                 cx25840_write4(client, 0x904, 0x08015555);
 191                                 cx25840_write4(client, 0x90c, 0x08015555);
 192                         } else {
 193
 194                                 cx25840_write4(client, 0x8f8, 0x0801867c);
 195
 196                                 cx25840_write4(client, 0x900, 0x08014faa);
 197                                 cx25840_write4(client, 0x904, 0x08014faa);
 198                                 cx25840_write4(client, 0x90c, 0x08014faa);
 199                         }
 200                         break;
 201                 }
 202         }
 203
 204         state->audclk_freq = freq;
 205
 206         return 0;
 207 }
 208
 209 void cx25840_audio_set_path(struct i2c_client *client)
 210 {
 211         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 212
 213         /* assert soft reset */
 214         cx25840_and_or(client, 0x810, ~0x1, 0x01);
 215
 216         /* stop microcontroller */
 217         cx25840_and_or(client, 0x803, ~0x10, 0);
 218
 219         /* Mute everything to prevent the PFFT! */
 220         cx25840_write(client, 0x8d3, 0x1f);
 221
 222         if (state->aud_input == CX25840_AUDIO_SERIAL) {
 223                 /* Set Path1 to Serial Audio Input */
 224                 cx25840_write4(client, 0x8d0, 0x01011012);
 225
 226                 /* The microcontroller should not be started for the
 227                  * non-tuner inputs: autodetection is specific for
 228                  * TV audio. */
 229         } else {
 230                 /* Set Path1 to Analog Demod Main Channel */
 231                 cx25840_write4(client, 0x8d0, 0x1f063870);
 232         }
 233
 234         set_audclk_freq(client, state->audclk_freq);
 235
 236         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 237                 /* When the microcontroller detects the
 238                  * audio format, it will unmute the lines */
 239                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 240         }
 241
 242         /* deassert soft reset */
 243         cx25840_and_or(client, 0x810, ~0x1, 0x00);
 244
 245         /* Ensure the controller is running when we exit */
 246         if (state->is_cx23885 || state->is_cx231xx)
 247                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 248 }
 249
 250 static int get_volume(struct i2c_client *client)
 251 {
 252         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 253         int vol;
 254
 255         if (state->unmute_volume >= 0)
 256                 return state->unmute_volume;
 257
 258         /* Volume runs +18dB to -96dB in 1/2dB steps
 259          * change to fit the msp3400 -114dB to +12dB range */
 260
 261         /* check PATH1_VOLUME */
 262         vol = 228 - cx25840_read(client, 0x8d4);
 263         vol = (vol / 2) + 23;
 264         return vol << 9;
 265 }
 266
 267 static void set_volume(struct i2c_client *client, int volume)
 268 {
 269         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 270         int vol;
 271
 272         if (state->unmute_volume >= 0) {
 273                 state->unmute_volume = volume;
 274                 return;
 275         }
 276
 277         /* Convert the volume to msp3400 values (0-127) */
 278         vol = volume >> 9;
 279
 280         /* now scale it up to cx25840 values
 281          * -114dB to -96dB maps to 0
 282          * this should be 19, but in my testing that was 4dB too loud */
 283         if (vol <= 23) {
 284                 vol = 0;
 285         } else {
 286                 vol -= 23;
 287         }
 288
 289         /* PATH1_VOLUME */
 290         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 291 }
 292
 293 static int get_bass(struct i2c_client *client)
 294 {
 295         /* bass is 49 steps +12dB to -12dB */
 296
 297         /* check PATH1_EQ_BASS_VOL */
 298         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 299         bass = (((48 - bass) * 0xffff) + 47) / 48;
 300         return bass;
 301 }
 302
 303 static void set_bass(struct i2c_client *client, int bass)
 304 {
 305         /* PATH1_EQ_BASS_VOL */
 306         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 307 }
 308
 309 static int get_treble(struct i2c_client *client)
 310 {
 311         /* treble is 49 steps +12dB to -12dB */
 312
 313         /* check PATH1_EQ_TREBLE_VOL */
 314         int treble = cx25840_read(client, 0x8db) & 0x3f;
 315         treble = (((48 - treble) * 0xffff) + 47) / 48;
 316         return treble;
 317 }
 318
 319 static void set_treble(struct i2c_client *client, int treble)
 320 {
 321         /* PATH1_EQ_TREBLE_VOL */
 322         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 323 }
 324
 325 static int get_balance(struct i2c_client *client)
 326 {
 327         /* balance is 7 bit, 0 to -96dB */
 328
 329         /* check PATH1_BAL_LEVEL */
 330         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 331         /* check PATH1_BAL_LEFT */
 332         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 333                 balance = 0x80 - balance;
 334         else
 335                 balance = 0x80 + balance;
 336         return balance << 8;
 337 }
 338
 339 static void set_balance(struct i2c_client *client, int balance)
 340 {
 341         int bal = balance >> 8;
 342         if (bal > 0x80) {
 343                 /* PATH1_BAL_LEFT */
 344                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 345                 /* PATH1_BAL_LEVEL */
 346                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 347         } else {
 348                 /* PATH1_BAL_LEFT */
 349                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 350                 /* PATH1_BAL_LEVEL */
 351                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 352         }
 353 }
 354
 355 static int get_mute(struct i2c_client *client)
 356 {
 357         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 358
 359         return state->unmute_volume >= 0;
 360 }
 361
 362 static void set_mute(struct i2c_client *client, int mute)
 363 {
 364         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
 365
 366         if (mute && state->unmute_volume == -1) {
 367                 int vol = get_volume(client);
 368
 369                 set_volume(client, 0);
 370                 state->unmute_volume = vol;
 371         }
 372         else if (!mute && state->unmute_volume != -1) {
 373                 int vol = state->unmute_volume;
 374
 375                 state->unmute_volume = -1;
 376                 set_volume(client, vol);
 377         }
 378 }
 379
 380 int cx25840_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
 381 {
 382         struct i2c_client *client = v4l2_get_subdevdata(sd);
 383         struct cx25840_state *state = to_state(sd);
 384         int retval;
 385
 386         if (!state->is_cx25836)
 387                 cx25840_and_or(client, 0x810, ~0x1, 1);
 388         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 389                 cx25840_and_or(client, 0x803, ~0x10, 0);
 390                 cx25840_write(client, 0x8d3, 0x1f);
 391         }
 392         retval = set_audclk_freq(client, freq);
 393         if (state->aud_input != CX25840_AUDIO_SERIAL)
 394                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 395         if (!state->is_cx25836)
 396                 cx25840_and_or(client, 0x810, ~0x1, 0);
 397         return retval;
 398 }
 399
 400 int cx25840_audio_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 401 {
 402         struct i2c_client *client = v4l2_get_subdevdata(sd);
 403
 404         switch (ctrl->id) {
 405         case V4L2_CID_AUDIO_VOLUME:
 406                 ctrl->value = get_volume(client);
 407                 break;
 408         case V4L2_CID_AUDIO_BASS:
 409                 ctrl->value = get_bass(client);
 410                 break;
 411         case V4L2_CID_AUDIO_TREBLE:
 412                 ctrl->value = get_treble(client);
 413                 break;
 414         case V4L2_CID_AUDIO_BALANCE:
 415                 ctrl->value = get_balance(client);
 416                 break;
 417         case V4L2_CID_AUDIO_MUTE:
 418                 ctrl->value = get_mute(client);
 419                 break;
 420         default:
 421                 return -EINVAL;
 422         }
 423         return 0;
 424 }
 425
 426 int cx25840_audio_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 427 {
 428         struct i2c_client *client = v4l2_get_subdevdata(sd);
 429
 430         switch (ctrl->id) {
 431         case V4L2_CID_AUDIO_VOLUME:
 432                 set_volume(client, ctrl->value);
 433                 break;
 434         case V4L2_CID_AUDIO_BASS:
 435                 set_bass(client, ctrl->value);
 436                 break;
 437         case V4L2_CID_AUDIO_TREBLE:
 438                 set_treble(client, ctrl->value);
 439                 break;
 440         case V4L2_CID_AUDIO_BALANCE:
 441                 set_balance(client, ctrl->value);
 442                 break;
 443         case V4L2_CID_AUDIO_MUTE:
 444                 set_mute(client, ctrl->value);
 445                 break;
 446         default:
 447                 return -EINVAL;
 448         }
 449         return 0;
 450 }