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/i2c-compat.h>
  23 #include <media/v4l2-common.h>
  24
  25 #include "cx25840.h"
  26
  27 inline static int set_audclk_freq(struct i2c_client *client,
  28                                  enum v4l2_audio_clock_freq freq)
  29 {
  30         struct cx25840_state *state = i2c_get_clientdata(client);
  31
  32         /* assert soft reset */
  33         cx25840_and_or(client, 0x810, ~0x1, 0x01);
  34
  35         /* common for all inputs and rates */
  36         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
  37         cx25840_write(client, 0x127, 0x50);
  38
  39         switch (state->audio_input) {
  40         case AUDIO_TUNER:
  41                 switch (freq) {
  42                 case V4L2_AUDCLK_32_KHZ:
  43                         /* VID_PLL and AUX_PLL */
  44                         cx25840_write4(client, 0x108, 0x0f040610);
  45
  46                         /* AUX_PLL_FRAC */
  47                         cx25840_write4(client, 0x110, 0xee39bb01);
  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 V4L2_AUDCLK_441_KHZ:
  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                         /* src3/4/6_ctl = 0x08016d59 */
  63                         cx25840_write4(client, 0x900, 0x596d0108);
  64                         cx25840_write4(client, 0x904, 0x596d0108);
  65                         cx25840_write4(client, 0x90c, 0x596d0108);
  66                         break;
  67
  68                 case V4L2_AUDCLK_48_KHZ:
  69                         /* VID_PLL and AUX_PLL */
  70                         cx25840_write4(client, 0x108, 0x0f040a10);
  71
  72                         /* AUX_PLL_FRAC */
  73                         cx25840_write4(client, 0x110, 0xe5d69800);
  74
  75                         /* src3/4/6_ctl = 0x08014faa */
  76                         cx25840_write4(client, 0x900, 0xaa4f0108);
  77                         cx25840_write4(client, 0x904, 0xaa4f0108);
  78                         cx25840_write4(client, 0x90c, 0xaa4f0108);
  79                         break;
  80                 }
  81                 break;
  82
  83         case AUDIO_EXTERN_1:
  84         case AUDIO_EXTERN_2:
  85         case AUDIO_INTERN:
  86         case AUDIO_RADIO:
  87                 switch (freq) {
  88                 case V4L2_AUDCLK_32_KHZ:
  89                         /* VID_PLL and AUX_PLL */
  90                         cx25840_write4(client, 0x108, 0x0f04081e);
  91
  92                         /* AUX_PLL_FRAC */
  93                         cx25840_write4(client, 0x110, 0x69082a01);
  94
  95                         /* src1_ctl = 0x08010000 */
  96                         cx25840_write4(client, 0x8f8, 0x00000108);
  97
  98                         /* src3/4/6_ctl = 0x08020000 */
  99                         cx25840_write4(client, 0x900, 0x00000208);
 100                         cx25840_write4(client, 0x904, 0x00000208);
 101                         cx25840_write4(client, 0x90c, 0x00000208);
 102
 103                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
 104                         cx25840_write(client, 0x127, 0x54);
 105                         break;
 106
 107                 case V4L2_AUDCLK_441_KHZ:
 108                         /* VID_PLL and AUX_PLL */
 109                         cx25840_write4(client, 0x108, 0x0f040918);
 110
 111                         /* AUX_PLL_FRAC */
 112                         cx25840_write4(client, 0x110, 0xd66bec00);
 113
 114                         /* src1_ctl = 0x08010000 */
 115                         cx25840_write4(client, 0x8f8, 0xcd600108);
 116
 117                         /* src3/4/6_ctl = 0x08020000 */
 118                         cx25840_write4(client, 0x900, 0x85730108);
 119                         cx25840_write4(client, 0x904, 0x85730108);
 120                         cx25840_write4(client, 0x90c, 0x85730108);
 121                         break;
 122
 123                 case V4L2_AUDCLK_48_KHZ:
 124                         /* VID_PLL and AUX_PLL */
 125                         cx25840_write4(client, 0x108, 0x0f040a18);
 126
 127                         /* AUX_PLL_FRAC */
 128                         cx25840_write4(client, 0x110, 0xe5d69800);
 129
 130                         /* src1_ctl = 0x08010000 */
 131                         cx25840_write4(client, 0x8f8, 0x00800108);
 132
 133                         /* src3/4/6_ctl = 0x08020000 */
 134                         cx25840_write4(client, 0x900, 0x55550108);
 135                         cx25840_write4(client, 0x904, 0x55550108);
 136                         cx25840_write4(client, 0x90c, 0x55550108);
 137                         break;
 138                 }
 139                 break;
 140         }
 141
 142         /* deassert soft reset */
 143         cx25840_and_or(client, 0x810, ~0x1, 0x00);
 144
 145         state->audclk_freq = freq;
 146
 147         return 0;
 148 }
 149
 150 static int set_input(struct i2c_client *client, int audio_input)
 151 {
 152         struct cx25840_state *state = i2c_get_clientdata(client);
 153
 154         cx25840_dbg("set audio input (%d)\n", audio_input);
 155
 156         /* stop microcontroller */
 157         cx25840_and_or(client, 0x803, ~0x10, 0);
 158
 159         /* Mute everything to prevent the PFFT! */
 160         cx25840_write(client, 0x8d3, 0x1f);
 161
 162         switch (audio_input) {
 163         case AUDIO_TUNER:
 164                 /* Set Path1 to Analog Demod Main Channel */
 165                 cx25840_write4(client, 0x8d0, 0x7038061f);
 166
 167                 /* When the microcontroller detects the
 168                  * audio format, it will unmute the lines */
 169                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
 170                 break;
 171
 172         case AUDIO_EXTERN_1:
 173         case AUDIO_EXTERN_2:
 174         case AUDIO_INTERN:
 175         case AUDIO_RADIO:
 176                 /* Set Path1 to Serial Audio Input */
 177                 cx25840_write4(client, 0x8d0, 0x12100101);
 178
 179                 /* The microcontroller should not be started for the
 180                  * non-tuner inputs: autodetection is specific for
 181                  * TV audio. */
 182                 break;
 183
 184         default:
 185                 cx25840_dbg("Invalid audio input selection %d\n", audio_input);
 186                 return -EINVAL;
 187         }
 188
 189         state->audio_input = audio_input;
 190
 191         return set_audclk_freq(client, state->audclk_freq);
 192 }
 193
 194 inline static int get_volume(struct i2c_client *client)
 195 {
 196         /* Volume runs +18dB to -96dB in 1/2dB steps
 197          * change to fit the msp3400 -114dB to +12dB range */
 198
 199         /* check PATH1_VOLUME */
 200         int vol = 228 - cx25840_read(client, 0x8d4);
 201         vol = (vol / 2) + 23;
 202         return vol << 9;
 203 }
 204
 205 inline static void set_volume(struct i2c_client *client, int volume)
 206 {
 207         /* First convert the volume to msp3400 values (0-127) */
 208         int vol = volume >> 9;
 209         /* now scale it up to cx25840 values
 210          * -114dB to -96dB maps to 0
 211          * this should be 19, but in my testing that was 4dB too loud */
 212         if (vol <= 23) {
 213                 vol = 0;
 214         } else {
 215                 vol -= 23;
 216         }
 217
 218         /* PATH1_VOLUME */
 219         cx25840_write(client, 0x8d4, 228 - (vol * 2));
 220 }
 221
 222 inline static int get_bass(struct i2c_client *client)
 223 {
 224         /* bass is 49 steps +12dB to -12dB */
 225
 226         /* check PATH1_EQ_BASS_VOL */
 227         int bass = cx25840_read(client, 0x8d9) & 0x3f;
 228         bass = (((48 - bass) * 0xffff) + 47) / 48;
 229         return bass;
 230 }
 231
 232 inline static void set_bass(struct i2c_client *client, int bass)
 233 {
 234         /* PATH1_EQ_BASS_VOL */
 235         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
 236 }
 237
 238 inline static int get_treble(struct i2c_client *client)
 239 {
 240         /* treble is 49 steps +12dB to -12dB */
 241
 242         /* check PATH1_EQ_TREBLE_VOL */
 243         int treble = cx25840_read(client, 0x8db) & 0x3f;
 244         treble = (((48 - treble) * 0xffff) + 47) / 48;
 245         return treble;
 246 }
 247
 248 inline static void set_treble(struct i2c_client *client, int treble)
 249 {
 250         /* PATH1_EQ_TREBLE_VOL */
 251         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
 252 }
 253
 254 inline static int get_balance(struct i2c_client *client)
 255 {
 256         /* balance is 7 bit, 0 to -96dB */
 257
 258         /* check PATH1_BAL_LEVEL */
 259         int balance = cx25840_read(client, 0x8d5) & 0x7f;
 260         /* check PATH1_BAL_LEFT */
 261         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
 262                 balance = 0x80 - balance;
 263         else
 264                 balance = 0x80 + balance;
 265         return balance << 8;
 266 }
 267
 268 inline static void set_balance(struct i2c_client *client, int balance)
 269 {
 270         int bal = balance >> 8;
 271         if (bal > 0x80) {
 272                 /* PATH1_BAL_LEFT */
 273                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
 274                 /* PATH1_BAL_LEVEL */
 275                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
 276         } else {
 277                 /* PATH1_BAL_LEFT */
 278                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
 279                 /* PATH1_BAL_LEVEL */
 280                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
 281         }
 282 }
 283
 284 inline static int get_mute(struct i2c_client *client)
 285 {
 286         /* check SRC1_MUTE_EN */
 287         return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
 288 }
 289
 290 inline static void set_mute(struct i2c_client *client, int mute)
 291 {
 292         struct cx25840_state *state = i2c_get_clientdata(client);
 293
 294         if (state->audio_input == AUDIO_TUNER) {
 295                 /* Must turn off microcontroller in order to mute sound.
 296                  * Not sure if this is the best method, but it does work.
 297                  * If the microcontroller is running, then it will undo any
 298                  * changes to the mute register. */
 299                 if (mute) {
 300                         /* disable microcontroller */
 301                         cx25840_and_or(client, 0x803, ~0x10, 0x00);
 302                         cx25840_write(client, 0x8d3, 0x1f);
 303                 } else {
 304                         /* enable microcontroller */
 305                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
 306                 }
 307         } else {
 308                 /* SRC1_MUTE_EN */
 309                 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
 310         }
 311 }
 312
 313 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 314 {
 315         struct v4l2_control *ctrl = arg;
 316
 317         switch (cmd) {
 318         case AUDC_SET_INPUT:
 319                 return set_input(client, *(int *)arg);
 320         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 321                 return set_audclk_freq(client, *(enum v4l2_audio_clock_freq *)arg);
 322         case VIDIOC_G_CTRL:
 323                 switch (ctrl->id) {
 324                 case V4L2_CID_AUDIO_VOLUME:
 325                         ctrl->value = get_volume(client);
 326                         break;
 327                 case V4L2_CID_AUDIO_BASS:
 328                         ctrl->value = get_bass(client);
 329                         break;
 330                 case V4L2_CID_AUDIO_TREBLE:
 331                         ctrl->value = get_treble(client);
 332                         break;
 333                 case V4L2_CID_AUDIO_BALANCE:
 334                         ctrl->value = get_balance(client);
 335                         break;
 336                 case V4L2_CID_AUDIO_MUTE:
 337                         ctrl->value = get_mute(client);
 338                         break;
 339                 default:
 340                         return -EINVAL;
 341                 }
 342                 break;
 343         case VIDIOC_S_CTRL:
 344                 switch (ctrl->id) {
 345                 case V4L2_CID_AUDIO_VOLUME:
 346                         set_volume(client, ctrl->value);
 347                         break;
 348                 case V4L2_CID_AUDIO_BASS:
 349                         set_bass(client, ctrl->value);
 350                         break;
 351                 case V4L2_CID_AUDIO_TREBLE:
 352                         set_treble(client, ctrl->value);
 353                         break;
 354                 case V4L2_CID_AUDIO_BALANCE:
 355                         set_balance(client, ctrl->value);
 356                         break;
 357                 case V4L2_CID_AUDIO_MUTE:
 358                         set_mute(client, ctrl->value);
 359                         break;
 360                 default:
 361                         return -EINVAL;
 362                 }
 363                 break;
 364         default:
 365                 return -EINVAL;
 366         }
 367
 368         return 0;
 369 }