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         /* Volume runs +18dB to -96dB in 1/2dB steps
 198          * change to fit the msp3400 -114dB to +12dB range */
 199
 200         /* check PATH1_VOLUME */
 201         int vol = 228 - cx25840_read(client, 0x8d4);
 202         vol = (vol / 2) + 23;
 203         return vol << 9;
 204 }
 205
 206 static void set_volume(struct i2c_client *client, int volume)
 207 {
 208         /* First convert the volume to msp3400 values (0-127) */
 209         int vol = volume >> 9;
 210         /* now scale it up to cx25840 values
 211          * -114dB to -96dB maps to 0
 212          * this should be 19, but in my testing that was 4dB too loud */
 213         if (vol <= 23) {
 214                 vol = 0;
 215         } else {
 216                 vol -= 23;
 217         }
 218
 219         /* PATH1_VOLUME */
 220         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 221 }
 222
 223 static int get_bass(struct i2c_client *client)
 224 {
 225         /* bass is 49 steps +12dB to -12dB */
 226
 227         /* check PATH1_EQ_BASS_VOL */
 228         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 229         bass = (((48 - bass) * 0xffff) + 47) / 48;
 230         return bass;
 231 }
 232
 233 static void set_bass(struct i2c_client *client, int bass)
 234 {
 235         /* PATH1_EQ_BASS_VOL */
 236         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 237 }
 238
 239 static int get_treble(struct i2c_client *client)
 240 {
 241         /* treble is 49 steps +12dB to -12dB */
 242
 243         /* check PATH1_EQ_TREBLE_VOL */
 244         int treble = cx25840_read(client, 0x8db) & 0x3f;
 245         treble = (((48 - treble) * 0xffff) + 47) / 48;
 246         return treble;
 247 }
 248
 249 static void set_treble(struct i2c_client *client, int treble)
 250 {
 251         /* PATH1_EQ_TREBLE_VOL */
 252         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 253 }
 254
 255 static int get_balance(struct i2c_client *client)
 256 {
 257         /* balance is 7 bit, 0 to -96dB */
 258
 259         /* check PATH1_BAL_LEVEL */
 260         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 261         /* check PATH1_BAL_LEFT */
 262         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 263                 balance = 0x80 - balance;
 264         else
 265                 balance = 0x80 + balance;
 266         return balance << 8;
 267 }
 268
 269 static void set_balance(struct i2c_client *client, int balance)
 270 {
 271         int bal = balance >> 8;
 272         if (bal > 0x80) {
 273                 /* PATH1_BAL_LEFT */
 274                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 275                 /* PATH1_BAL_LEVEL */
 276                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 277         } else {
 278                 /* PATH1_BAL_LEFT */
 279                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 280                 /* PATH1_BAL_LEVEL */
 281                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 282         }
 283 }
 284
 285 static int get_mute(struct i2c_client *client)
 286 {
 287         /* check SRC1_MUTE_EN */
 288         return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
 289 }
 290
 291 static void set_mute(struct i2c_client *client, int mute)
 292 {
 293         struct cx25840_state *state = i2c_get_clientdata(client);
 294
 295         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 296                 /* Must turn off microcontroller in order to mute sound.
 297                  * Not sure if this is the best method, but it does work.
 298                  * If the microcontroller is running, then it will undo any
 299                  * changes to the mute register. */
 300                 if (mute) {
 301                         /* disable microcontroller */
 302                         cx25840_and_or(client, 0x803, ~0x10, 0x00);
 303                         cx25840_write(client, 0x8d3, 0x1f);
 304                 } else {
 305                         /* enable microcontroller */
 306                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 307                 }
 308         } else {
 309                 /* SRC1_MUTE_EN */
 310                 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
 311         }
 312 }
 313
 314 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 315 {
 316         struct cx25840_state *state = i2c_get_clientdata(client);
 317         struct v4l2_control *ctrl = arg;
 318         int retval;
 319
 320         switch (cmd) {
 321         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 322                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 323                         cx25840_and_or(client, 0x803, ~0x10, 0);
 324                         cx25840_write(client, 0x8d3, 0x1f);
 325                 }
 326                 if (!state->is_cx25836)
 327                         cx25840_and_or(client, 0x810, ~0x1, 1);
 328                 retval = set_audclk_freq(client, *(u32 *)arg);
 329                 if (!state->is_cx25836)
 330                         cx25840_and_or(client, 0x810, ~0x1, 0);
 331                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 332                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 333                 }
 334                 return retval;
 335
 336         case VIDIOC_G_CTRL:
 337                 switch (ctrl->id) {
 338                 case V4L2_CID_AUDIO_VOLUME:
 339                         ctrl->value = get_volume(client);
 340                         break;
 341                 case V4L2_CID_AUDIO_BASS:
 342                         ctrl->value = get_bass(client);
 343                         break;
 344                 case V4L2_CID_AUDIO_TREBLE:
 345                         ctrl->value = get_treble(client);
 346                         break;
 347                 case V4L2_CID_AUDIO_BALANCE:
 348                         ctrl->value = get_balance(client);
 349                         break;
 350                 case V4L2_CID_AUDIO_MUTE:
 351                         ctrl->value = get_mute(client);
 352                         break;
 353                 default:
 354                         return -EINVAL;
 355                 }
 356                 break;
 357
 358         case VIDIOC_S_CTRL:
 359                 switch (ctrl->id) {
 360                 case V4L2_CID_AUDIO_VOLUME:
 361                         set_volume(client, ctrl->value);
 362                         break;
 363                 case V4L2_CID_AUDIO_BASS:
 364                         set_bass(client, ctrl->value);
 365                         break;
 366                 case V4L2_CID_AUDIO_TREBLE:
 367                         set_treble(client, ctrl->value);
 368                         break;
 369                 case V4L2_CID_AUDIO_BALANCE:
 370                         set_balance(client, ctrl->value);
 371                         break;
 372                 case V4L2_CID_AUDIO_MUTE:
 373                         set_mute(client, ctrl->value);
 374                         break;
 375                 default:
 376                         return -EINVAL;
 377                 }
 378                 break;
 379
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         return 0;
 385 }