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/audiochip.h>
  22 #include <media/v4l2-common.h>
  23
  24 #include "cx25840.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         /* assert soft reset */
  34         cx25840_and_or(client, 0x810, ~0x1, 0x01);
  35
  36         /* common for all inputs and rates */
  37         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  38         cx25840_write(client, 0x127, 0x50);
  39
  40         switch (state->audio_input) {
  41         case AUDIO_TUNER:
  42                 switch (freq) {
  43                 case 32000:
  44                         /* VID_PLL and AUX_PLL */
  45                         cx25840_write4(client, 0x108, 0x0f040610);
  46
  47                         /* AUX_PLL_FRAC */
  48                         cx25840_write4(client, 0x110, 0xee39bb01);
  49
  50                         /* src3/4/6_ctl = 0x0801f77f */
  51                         cx25840_write4(client, 0x900, 0x7ff70108);
  52                         cx25840_write4(client, 0x904, 0x7ff70108);
  53                         cx25840_write4(client, 0x90c, 0x7ff70108);
  54                         break;
  55
  56                 case 44100:
  57                         /* VID_PLL and AUX_PLL */
  58                         cx25840_write4(client, 0x108, 0x0f040910);
  59
  60                         /* AUX_PLL_FRAC */
  61                         cx25840_write4(client, 0x110, 0xd66bec00);
  62
  63                         /* src3/4/6_ctl = 0x08016d59 */
  64                         cx25840_write4(client, 0x900, 0x596d0108);
  65                         cx25840_write4(client, 0x904, 0x596d0108);
  66                         cx25840_write4(client, 0x90c, 0x596d0108);
  67                         break;
  68
  69                 case 48000:
  70                         /* VID_PLL and AUX_PLL */
  71                         cx25840_write4(client, 0x108, 0x0f040a10);
  72
  73                         /* AUX_PLL_FRAC */
  74                         cx25840_write4(client, 0x110, 0xe5d69800);
  75
  76                         /* src3/4/6_ctl = 0x08014faa */
  77                         cx25840_write4(client, 0x900, 0xaa4f0108);
  78                         cx25840_write4(client, 0x904, 0xaa4f0108);
  79                         cx25840_write4(client, 0x90c, 0xaa4f0108);
  80                         break;
  81                 }
  82                 break;
  83
  84         case AUDIO_EXTERN_1:
  85         case AUDIO_EXTERN_2:
  86         case AUDIO_INTERN:
  87         case AUDIO_RADIO:
  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                         /* src1_ctl = 0x08010000 */
  97                         cx25840_write4(client, 0x8f8, 0x00000108);
  98
  99                         /* src3/4/6_ctl = 0x08020000 */
 100                         cx25840_write4(client, 0x900, 0x00000208);
 101                         cx25840_write4(client, 0x904, 0x00000208);
 102                         cx25840_write4(client, 0x90c, 0x00000208);
 103
 104                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 105                         cx25840_write(client, 0x127, 0x54);
 106                         break;
 107
 108                 case 44100:
 109                         /* VID_PLL and AUX_PLL */
 110                         cx25840_write4(client, 0x108, 0x0f040918);
 111
 112                         /* AUX_PLL_FRAC */
 113                         cx25840_write4(client, 0x110, 0xd66bec00);
 114
 115                         /* src1_ctl = 0x08010000 */
 116                         cx25840_write4(client, 0x8f8, 0xcd600108);
 117
 118                         /* src3/4/6_ctl = 0x08020000 */
 119                         cx25840_write4(client, 0x900, 0x85730108);
 120                         cx25840_write4(client, 0x904, 0x85730108);
 121                         cx25840_write4(client, 0x90c, 0x85730108);
 122                         break;
 123
 124                 case 48000:
 125                         /* VID_PLL and AUX_PLL */
 126                         cx25840_write4(client, 0x108, 0x0f040a18);
 127
 128                         /* AUX_PLL_FRAC */
 129                         cx25840_write4(client, 0x110, 0xe5d69800);
 130
 131                         /* src1_ctl = 0x08010000 */
 132                         cx25840_write4(client, 0x8f8, 0x00800108);
 133
 134                         /* src3/4/6_ctl = 0x08020000 */
 135                         cx25840_write4(client, 0x900, 0x55550108);
 136                         cx25840_write4(client, 0x904, 0x55550108);
 137                         cx25840_write4(client, 0x90c, 0x55550108);
 138                         break;
 139                 }
 140                 break;
 141         }
 142
 143         /* deassert soft reset */
 144         cx25840_and_or(client, 0x810, ~0x1, 0x00);
 145
 146         state->audclk_freq = freq;
 147
 148         return 0;
 149 }
 150
 151 static int set_input(struct i2c_client *client, int audio_input)
 152 {
 153         struct cx25840_state *state = i2c_get_clientdata(client);
 154
 155         cx25840_dbg("set audio input (%d)\n", audio_input);
 156
 157         /* stop microcontroller */
 158         cx25840_and_or(client, 0x803, ~0x10, 0);
 159
 160         /* Mute everything to prevent the PFFT! */
 161         cx25840_write(client, 0x8d3, 0x1f);
 162
 163         switch (audio_input) {
 164         case AUDIO_TUNER:
 165                 /* Set Path1 to Analog Demod Main Channel */
 166                 cx25840_write4(client, 0x8d0, 0x7038061f);
 167
 168                 /* When the microcontroller detects the
 169                  * audio format, it will unmute the lines */
 170                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 171                 break;
 172
 173         case AUDIO_EXTERN_1:
 174         case AUDIO_EXTERN_2:
 175         case AUDIO_INTERN:
 176         case AUDIO_RADIO:
 177                 /* Set Path1 to Serial Audio Input */
 178                 cx25840_write4(client, 0x8d0, 0x12100101);
 179
 180                 /* The microcontroller should not be started for the
 181                  * non-tuner inputs: autodetection is specific for
 182                  * TV audio. */
 183                 break;
 184
 185         default:
 186                 cx25840_dbg("Invalid audio input selection %d\n", audio_input);
 187                 return -EINVAL;
 188         }
 189
 190         state->audio_input = audio_input;
 191
 192         return set_audclk_freq(client, state->audclk_freq);
 193 }
 194
 195 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline 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 inline static void set_mute(struct i2c_client *client, int mute)
 292 {
 293         struct cx25840_state *state = i2c_get_clientdata(client);
 294
 295         if (state->audio_input == AUDIO_TUNER) {
 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 v4l2_control *ctrl = arg;
 317
 318         switch (cmd) {
 319         case AUDC_SET_INPUT:
 320                 return set_input(client, *(int *)arg);
 321         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 322                 return set_audclk_freq(client, *(u32 *)arg);
 323         case VIDIOC_G_CTRL:
 324                 switch (ctrl->id) {
 325                 case V4L2_CID_AUDIO_VOLUME:
 326                         ctrl->value = get_volume(client);
 327                         break;
 328                 case V4L2_CID_AUDIO_BASS:
 329                         ctrl->value = get_bass(client);
 330                         break;
 331                 case V4L2_CID_AUDIO_TREBLE:
 332                         ctrl->value = get_treble(client);
 333                         break;
 334                 case V4L2_CID_AUDIO_BALANCE:
 335                         ctrl->value = get_balance(client);
 336                         break;
 337                 case V4L2_CID_AUDIO_MUTE:
 338                         ctrl->value = get_mute(client);
 339                         break;
 340                 default:
 341                         return -EINVAL;
 342                 }
 343                 break;
 344         case VIDIOC_S_CTRL:
 345                 switch (ctrl->id) {
 346                 case V4L2_CID_AUDIO_VOLUME:
 347                         set_volume(client, ctrl->value);
 348                         break;
 349                 case V4L2_CID_AUDIO_BASS:
 350                         set_bass(client, ctrl->value);
 351                         break;
 352                 case V4L2_CID_AUDIO_TREBLE:
 353                         set_treble(client, ctrl->value);
 354                         break;
 355                 case V4L2_CID_AUDIO_BALANCE:
 356                         set_balance(client, ctrl->value);
 357                         break;
 358                 case V4L2_CID_AUDIO_MUTE:
 359                         set_mute(client, ctrl->value);
 360                         break;
 361                 default:
 362                         return -EINVAL;
 363                 }
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368
 369         return 0;
 370 }