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 = 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         cx25840_write(client, 0x127, 0x50);
  36
  37         if (state->aud_input != CX25840_AUDIO_SERIAL) {
  38                 switch (freq) {
  39                 case 32000:
  40                         /* VID_PLL and AUX_PLL */
  41                         cx25840_write4(client, 0x108, 0x0f040610);
  42
  43                         /* AUX_PLL_FRAC */
  44                         cx25840_write4(client, 0x110, 0xee39bb01);
  45
  46                         if (state->is_cx25836)
  47                                 break;
  48
  49                         /* src3/4/6_ctl = 0x0801f77f */
  50                         cx25840_write4(client, 0x900, 0x7ff70108);
  51                         cx25840_write4(client, 0x904, 0x7ff70108);
  52                         cx25840_write4(client, 0x90c, 0x7ff70108);
  53                         break;
  54
  55                 case 44100:
  56                         /* VID_PLL and AUX_PLL */
  57                         cx25840_write4(client, 0x108, 0x0f040910);
  58
  59                         /* AUX_PLL_FRAC */
  60                         cx25840_write4(client, 0x110, 0xd66bec00);
  61
  62                         if (state->is_cx25836)
  63                                 break;
  64
  65                         /* src3/4/6_ctl = 0x08016d59 */
  66                         cx25840_write4(client, 0x900, 0x596d0108);
  67                         cx25840_write4(client, 0x904, 0x596d0108);
  68                         cx25840_write4(client, 0x90c, 0x596d0108);
  69                         break;
  70
  71                 case 48000:
  72                         /* VID_PLL and AUX_PLL */
  73                         cx25840_write4(client, 0x108, 0x0f040a10);
  74
  75                         /* AUX_PLL_FRAC */
  76                         cx25840_write4(client, 0x110, 0xe5d69800);
  77
  78                         if (state->is_cx25836)
  79                                 break;
  80
  81                         /* src3/4/6_ctl = 0x08014faa */
  82                         cx25840_write4(client, 0x900, 0xaa4f0108);
  83                         cx25840_write4(client, 0x904, 0xaa4f0108);
  84                         cx25840_write4(client, 0x90c, 0xaa4f0108);
  85                         break;
  86                 }
  87         } else {
  88                 switch (freq) {
  89                 case 32000:
  90                         /* VID_PLL and AUX_PLL */
  91                         cx25840_write4(client, 0x108, 0x0f04081e);
  92
  93                         /* AUX_PLL_FRAC */
  94                         cx25840_write4(client, 0x110, 0x69082a01);
  95
  96                         if (state->is_cx25836)
  97                                 break;
  98
  99                         /* src1_ctl = 0x08010000 */
 100                         cx25840_write4(client, 0x8f8, 0x00000108);
 101
 102                         /* src3/4/6_ctl = 0x08020000 */
 103                         cx25840_write4(client, 0x900, 0x00000208);
 104                         cx25840_write4(client, 0x904, 0x00000208);
 105                         cx25840_write4(client, 0x90c, 0x00000208);
 106
 107                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 108                         cx25840_write(client, 0x127, 0x54);
 109                         break;
 110
 111                 case 44100:
 112                         /* VID_PLL and AUX_PLL */
 113                         cx25840_write4(client, 0x108, 0x0f040918);
 114
 115                         /* AUX_PLL_FRAC */
 116                         cx25840_write4(client, 0x110, 0xd66bec00);
 117
 118                         if (state->is_cx25836)
 119                                 break;
 120
 121                         /* src1_ctl = 0x08010000 */
 122                         cx25840_write4(client, 0x8f8, 0xcd600108);
 123
 124                         /* src3/4/6_ctl = 0x08020000 */
 125                         cx25840_write4(client, 0x900, 0x85730108);
 126                         cx25840_write4(client, 0x904, 0x85730108);
 127                         cx25840_write4(client, 0x90c, 0x85730108);
 128                         break;
 129
 130                 case 48000:
 131                         /* VID_PLL and AUX_PLL */
 132                         cx25840_write4(client, 0x108, 0x0f040a18);
 133
 134                         /* AUX_PLL_FRAC */
 135                         cx25840_write4(client, 0x110, 0xe5d69800);
 136
 137                         if (state->is_cx25836)
 138                                 break;
 139
 140                         /* src1_ctl = 0x08010000 */
 141                         cx25840_write4(client, 0x8f8, 0x00800108);
 142
 143                         /* src3/4/6_ctl = 0x08020000 */
 144                         cx25840_write4(client, 0x900, 0x55550108);
 145                         cx25840_write4(client, 0x904, 0x55550108);
 146                         cx25840_write4(client, 0x90c, 0x55550108);
 147                         break;
 148                 }
 149         }
 150
 151         state->audclk_freq = freq;
 152
 153         return 0;
 154 }
 155
 156 void cx25840_audio_set_path(struct i2c_client *client)
 157 {
 158         struct cx25840_state *state = i2c_get_clientdata(client);
 159
 160         /* stop microcontroller */
 161         cx25840_and_or(client, 0x803, ~0x10, 0);
 162
 163         /* assert soft reset */
 164         if (!state->is_cx25836)
 165                 cx25840_and_or(client, 0x810, ~0x1, 0x01);
 166
 167         /* Mute everything to prevent the PFFT! */
 168         cx25840_write(client, 0x8d3, 0x1f);
 169
 170         if (state->aud_input == CX25840_AUDIO_SERIAL) {
 171                 /* Set Path1 to Serial Audio Input */
 172                 cx25840_write4(client, 0x8d0, 0x12100101);
 173
 174                 /* The microcontroller should not be started for the
 175                  * non-tuner inputs: autodetection is specific for
 176                  * TV audio. */
 177         } else {
 178                 /* Set Path1 to Analog Demod Main Channel */
 179                 cx25840_write4(client, 0x8d0, 0x7038061f);
 180         }
 181
 182         set_audclk_freq(client, state->audclk_freq);
 183
 184         /* deassert soft reset */
 185         if (!state->is_cx25836)
 186                 cx25840_and_or(client, 0x810, ~0x1, 0x00);
 187
 188         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 189                 /* When the microcontroller detects the
 190                  * audio format, it will unmute the lines */
 191                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 192         }
 193 }
 194
 195 static int get_volume(struct i2c_client *client)
 196 {
 197         struct cx25840_state *state = i2c_get_clientdata(client);
 198         int vol;
 199
 200         if (state->unmute_volume >= 0)
 201                 return state->unmute_volume;
 202
 203         /* Volume runs +18dB to -96dB in 1/2dB steps
 204          * change to fit the msp3400 -114dB to +12dB range */
 205
 206         /* check PATH1_VOLUME */
 207         vol = 228 - cx25840_read(client, 0x8d4);
 208         vol = (vol / 2) + 23;
 209         return vol << 9;
 210 }
 211
 212 static void set_volume(struct i2c_client *client, int volume)
 213 {
 214         struct cx25840_state *state = i2c_get_clientdata(client);
 215         int vol;
 216
 217         if (state->unmute_volume >= 0) {
 218                 state->unmute_volume = volume;
 219                 return;
 220         }
 221
 222         /* Convert the volume to msp3400 values (0-127) */
 223         vol = volume >> 9;
 224
 225         /* now scale it up to cx25840 values
 226          * -114dB to -96dB maps to 0
 227          * this should be 19, but in my testing that was 4dB too loud */
 228         if (vol <= 23) {
 229                 vol = 0;
 230         } else {
 231                 vol -= 23;
 232         }
 233
 234         /* PATH1_VOLUME */
 235         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 236 }
 237
 238 static int get_bass(struct i2c_client *client)
 239 {
 240         /* bass is 49 steps +12dB to -12dB */
 241
 242         /* check PATH1_EQ_BASS_VOL */
 243         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 244         bass = (((48 - bass) * 0xffff) + 47) / 48;
 245         return bass;
 246 }
 247
 248 static void set_bass(struct i2c_client *client, int bass)
 249 {
 250         /* PATH1_EQ_BASS_VOL */
 251         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 252 }
 253
 254 static int get_treble(struct i2c_client *client)
 255 {
 256         /* treble is 49 steps +12dB to -12dB */
 257
 258         /* check PATH1_EQ_TREBLE_VOL */
 259         int treble = cx25840_read(client, 0x8db) & 0x3f;
 260         treble = (((48 - treble) * 0xffff) + 47) / 48;
 261         return treble;
 262 }
 263
 264 static void set_treble(struct i2c_client *client, int treble)
 265 {
 266         /* PATH1_EQ_TREBLE_VOL */
 267         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 268 }
 269
 270 static int get_balance(struct i2c_client *client)
 271 {
 272         /* balance is 7 bit, 0 to -96dB */
 273
 274         /* check PATH1_BAL_LEVEL */
 275         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 276         /* check PATH1_BAL_LEFT */
 277         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 278                 balance = 0x80 - balance;
 279         else
 280                 balance = 0x80 + balance;
 281         return balance << 8;
 282 }
 283
 284 static void set_balance(struct i2c_client *client, int balance)
 285 {
 286         int bal = balance >> 8;
 287         if (bal > 0x80) {
 288                 /* PATH1_BAL_LEFT */
 289                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 290                 /* PATH1_BAL_LEVEL */
 291                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 292         } else {
 293                 /* PATH1_BAL_LEFT */
 294                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 295                 /* PATH1_BAL_LEVEL */
 296                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 297         }
 298 }
 299
 300 static int get_mute(struct i2c_client *client)
 301 {
 302         struct cx25840_state *state = i2c_get_clientdata(client);
 303
 304         return state->unmute_volume >= 0;
 305 }
 306
 307 static void set_mute(struct i2c_client *client, int mute)
 308 {
 309         struct cx25840_state *state = i2c_get_clientdata(client);
 310
 311         if (mute && state->unmute_volume == -1) {
 312                 int vol = get_volume(client);
 313
 314                 set_volume(client, 0);
 315                 state->unmute_volume = vol;
 316         }
 317         else if (!mute && state->unmute_volume != -1) {
 318                 int vol = state->unmute_volume;
 319
 320                 state->unmute_volume = -1;
 321                 set_volume(client, vol);
 322         }
 323 }
 324
 325 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 326 {
 327         struct cx25840_state *state = i2c_get_clientdata(client);
 328         struct v4l2_control *ctrl = arg;
 329         int retval;
 330
 331         switch (cmd) {
 332         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 333                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 334                         cx25840_and_or(client, 0x803, ~0x10, 0);
 335                         cx25840_write(client, 0x8d3, 0x1f);
 336                 }
 337                 if (!state->is_cx25836)
 338                         cx25840_and_or(client, 0x810, ~0x1, 1);
 339                 retval = set_audclk_freq(client, *(u32 *)arg);
 340                 if (!state->is_cx25836)
 341                         cx25840_and_or(client, 0x810, ~0x1, 0);
 342                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 343                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 344                 }
 345                 return retval;
 346
 347         case VIDIOC_G_CTRL:
 348                 switch (ctrl->id) {
 349                 case V4L2_CID_AUDIO_VOLUME:
 350                         ctrl->value = get_volume(client);
 351                         break;
 352                 case V4L2_CID_AUDIO_BASS:
 353                         ctrl->value = get_bass(client);
 354                         break;
 355                 case V4L2_CID_AUDIO_TREBLE:
 356                         ctrl->value = get_treble(client);
 357                         break;
 358                 case V4L2_CID_AUDIO_BALANCE:
 359                         ctrl->value = get_balance(client);
 360                         break;
 361                 case V4L2_CID_AUDIO_MUTE:
 362                         ctrl->value = get_mute(client);
 363                         break;
 364                 default:
 365                         return -EINVAL;
 366                 }
 367                 break;
 368
 369         case VIDIOC_S_CTRL:
 370                 switch (ctrl->id) {
 371                 case V4L2_CID_AUDIO_VOLUME:
 372                         set_volume(client, ctrl->value);
 373                         break;
 374                 case V4L2_CID_AUDIO_BASS:
 375                         set_bass(client, ctrl->value);
 376                         break;
 377                 case V4L2_CID_AUDIO_TREBLE:
 378                         set_treble(client, ctrl->value);
 379                         break;
 380                 case V4L2_CID_AUDIO_BALANCE:
 381                         set_balance(client, ctrl->value);
 382                         break;
 383                 case V4L2_CID_AUDIO_MUTE:
 384                         set_mute(client, ctrl->value);
 385                         break;
 386                 default:
 387                         return -EINVAL;
 388                 }
 389                 break;
 390
 391         default:
 392                 return -EINVAL;
 393         }
 394
 395         return 0;
 396 }