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         /* assert soft reset */
 161         cx25840_and_or(client, 0x810, ~0x1, 0x01);
 162
 163         /* stop microcontroller */
 164         cx25840_and_or(client, 0x803, ~0x10, 0);
 165
 166         /* Mute everything to prevent the PFFT! */
 167         cx25840_write(client, 0x8d3, 0x1f);
 168
 169         if (state->aud_input == CX25840_AUDIO_SERIAL) {
 170                 /* Set Path1 to Serial Audio Input */
 171                 cx25840_write4(client, 0x8d0, 0x12100101);
 172
 173                 /* The microcontroller should not be started for the
 174                  * non-tuner inputs: autodetection is specific for
 175                  * TV audio. */
 176         } else {
 177                 /* Set Path1 to Analog Demod Main Channel */
 178                 cx25840_write4(client, 0x8d0, 0x7038061f);
 179         }
 180
 181         set_audclk_freq(client, state->audclk_freq);
 182
 183         if (state->aud_input != CX25840_AUDIO_SERIAL) {
 184                 /* When the microcontroller detects the
 185                  * audio format, it will unmute the lines */
 186                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 187         }
 188
 189         /* deassert soft reset */
 190         cx25840_and_or(client, 0x810, ~0x1, 0x00);
 191 }
 192
 193 static int get_volume(struct i2c_client *client)
 194 {
 195         struct cx25840_state *state = i2c_get_clientdata(client);
 196         int vol;
 197
 198         if (state->unmute_volume >= 0)
 199                 return state->unmute_volume;
 200
 201         /* Volume runs +18dB to -96dB in 1/2dB steps
 202          * change to fit the msp3400 -114dB to +12dB range */
 203
 204         /* check PATH1_VOLUME */
 205         vol = 228 - cx25840_read(client, 0x8d4);
 206         vol = (vol / 2) + 23;
 207         return vol << 9;
 208 }
 209
 210 static void set_volume(struct i2c_client *client, int volume)
 211 {
 212         struct cx25840_state *state = i2c_get_clientdata(client);
 213         int vol;
 214
 215         if (state->unmute_volume >= 0) {
 216                 state->unmute_volume = volume;
 217                 return;
 218         }
 219
 220         /* Convert the volume to msp3400 values (0-127) */
 221         vol = volume >> 9;
 222
 223         /* now scale it up to cx25840 values
 224          * -114dB to -96dB maps to 0
 225          * this should be 19, but in my testing that was 4dB too loud */
 226         if (vol <= 23) {
 227                 vol = 0;
 228         } else {
 229                 vol -= 23;
 230         }
 231
 232         /* PATH1_VOLUME */
 233         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 234 }
 235
 236 static int get_bass(struct i2c_client *client)
 237 {
 238         /* bass is 49 steps +12dB to -12dB */
 239
 240         /* check PATH1_EQ_BASS_VOL */
 241         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 242         bass = (((48 - bass) * 0xffff) + 47) / 48;
 243         return bass;
 244 }
 245
 246 static void set_bass(struct i2c_client *client, int bass)
 247 {
 248         /* PATH1_EQ_BASS_VOL */
 249         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 250 }
 251
 252 static int get_treble(struct i2c_client *client)
 253 {
 254         /* treble is 49 steps +12dB to -12dB */
 255
 256         /* check PATH1_EQ_TREBLE_VOL */
 257         int treble = cx25840_read(client, 0x8db) & 0x3f;
 258         treble = (((48 - treble) * 0xffff) + 47) / 48;
 259         return treble;
 260 }
 261
 262 static void set_treble(struct i2c_client *client, int treble)
 263 {
 264         /* PATH1_EQ_TREBLE_VOL */
 265         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 266 }
 267
 268 static int get_balance(struct i2c_client *client)
 269 {
 270         /* balance is 7 bit, 0 to -96dB */
 271
 272         /* check PATH1_BAL_LEVEL */
 273         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 274         /* check PATH1_BAL_LEFT */
 275         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 276                 balance = 0x80 - balance;
 277         else
 278                 balance = 0x80 + balance;
 279         return balance << 8;
 280 }
 281
 282 static void set_balance(struct i2c_client *client, int balance)
 283 {
 284         int bal = balance >> 8;
 285         if (bal > 0x80) {
 286                 /* PATH1_BAL_LEFT */
 287                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 288                 /* PATH1_BAL_LEVEL */
 289                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 290         } else {
 291                 /* PATH1_BAL_LEFT */
 292                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 293                 /* PATH1_BAL_LEVEL */
 294                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 295         }
 296 }
 297
 298 static int get_mute(struct i2c_client *client)
 299 {
 300         struct cx25840_state *state = i2c_get_clientdata(client);
 301
 302         return state->unmute_volume >= 0;
 303 }
 304
 305 static void set_mute(struct i2c_client *client, int mute)
 306 {
 307         struct cx25840_state *state = i2c_get_clientdata(client);
 308
 309         if (mute && state->unmute_volume == -1) {
 310                 int vol = get_volume(client);
 311
 312                 set_volume(client, 0);
 313                 state->unmute_volume = vol;
 314         }
 315         else if (!mute && state->unmute_volume != -1) {
 316                 int vol = state->unmute_volume;
 317
 318                 state->unmute_volume = -1;
 319                 set_volume(client, vol);
 320         }
 321 }
 322
 323 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 324 {
 325         struct cx25840_state *state = i2c_get_clientdata(client);
 326         struct v4l2_control *ctrl = arg;
 327         int retval;
 328
 329         switch (cmd) {
 330         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 331                 if (!state->is_cx25836)
 332                         cx25840_and_or(client, 0x810, ~0x1, 1);
 333                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 334                         cx25840_and_or(client, 0x803, ~0x10, 0);
 335                         cx25840_write(client, 0x8d3, 0x1f);
 336                 }
 337                 retval = set_audclk_freq(client, *(u32 *)arg);
 338                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
 339                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 340                 }
 341                 if (!state->is_cx25836)
 342                         cx25840_and_or(client, 0x810, ~0x1, 0);
 343                 return retval;
 344
 345         case VIDIOC_G_CTRL:
 346                 switch (ctrl->id) {
 347                 case V4L2_CID_AUDIO_VOLUME:
 348                         ctrl->value = get_volume(client);
 349                         break;
 350                 case V4L2_CID_AUDIO_BASS:
 351                         ctrl->value = get_bass(client);
 352                         break;
 353                 case V4L2_CID_AUDIO_TREBLE:
 354                         ctrl->value = get_treble(client);
 355                         break;
 356                 case V4L2_CID_AUDIO_BALANCE:
 357                         ctrl->value = get_balance(client);
 358                         break;
 359                 case V4L2_CID_AUDIO_MUTE:
 360                         ctrl->value = get_mute(client);
 361                         break;
 362                 default:
 363                         return -EINVAL;
 364                 }
 365                 break;
 366
 367         case VIDIOC_S_CTRL:
 368                 switch (ctrl->id) {
 369                 case V4L2_CID_AUDIO_VOLUME:
 370                         set_volume(client, ctrl->value);
 371                         break;
 372                 case V4L2_CID_AUDIO_BASS:
 373                         set_bass(client, ctrl->value);
 374                         break;
 375                 case V4L2_CID_AUDIO_TREBLE:
 376                         set_treble(client, ctrl->value);
 377                         break;
 378                 case V4L2_CID_AUDIO_BALANCE:
 379                         set_balance(client, ctrl->value);
 380                         break;
 381                 case V4L2_CID_AUDIO_MUTE:
 382                         set_mute(client, ctrl->value);
 383                         break;
 384                 default:
 385                         return -EINVAL;
 386                 }
 387                 break;
 388
 389         default:
 390                 return -EINVAL;
 391         }
 392
 393         return 0;
 394 }