drivers/media/pci/cx88/cx88-tvaudio.c

   1 /*
   2  * cx88x-audio.c - Conexant CX23880/23881 audio downstream driver driver
   3  *
   4  *  (c) 2001 Michael Eskin, Tom Zakrajsek [Windows version]
   5  *  (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
   6  *  (c) 2003 Gerd Knorr <kraxel@bytesex.org>
   7  *
   8  * -----------------------------------------------------------------------
   9  *
  10  * Lot of voodoo here.  Even the data sheet doesn't help to
  11  * understand what is going on here, the documentation for the audio
  12  * part of the cx2388x chip is *very* bad.
  13  *
  14  * Some of this comes from party done linux driver sources I got from
  15  * [undocumented].
  16  *
  17  * Some comes from the dscaler sources, one of the dscaler driver guy works
  18  * for Conexant ...
  19  *
  20  * -----------------------------------------------------------------------
  21  *
  22  * This program is free software; you can redistribute it and/or modify
  23  * it under the terms of the GNU General Public License as published by
  24  * the Free Software Foundation; either version 2 of the License, or
  25  * (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  30  * GNU General Public License for more details.
  31  */
  32
  33 #include "cx88.h"
  34
  35 #include <linux/module.h>
  36 #include <linux/errno.h>
  37 #include <linux/freezer.h>
  38 #include <linux/kernel.h>
  39 #include <linux/mm.h>
  40 #include <linux/poll.h>
  41 #include <linux/signal.h>
  42 #include <linux/ioport.h>
  43 #include <linux/types.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/vmalloc.h>
  46 #include <linux/init.h>
  47 #include <linux/delay.h>
  48 #include <linux/kthread.h>
  49
  50 static unsigned int audio_debug;
  51 module_param(audio_debug, int, 0644);
  52 MODULE_PARM_DESC(audio_debug, "enable debug messages [audio]");
  53
  54 static unsigned int always_analog;
  55 module_param(always_analog, int, 0644);
  56 MODULE_PARM_DESC(always_analog, "force analog audio out");
  57
  58 static unsigned int radio_deemphasis;
  59 module_param(radio_deemphasis, int, 0644);
  60 MODULE_PARM_DESC(radio_deemphasis, "Radio deemphasis time constant, 0=None, 1=50us (elsewhere), 2=75us (USA)");
  61
  62 #define dprintk(fmt, arg...) do {                               \
  63         if (audio_debug)                                                \
  64                 printk(KERN_DEBUG pr_fmt("%s: tvaudio:" fmt),           \
  65                         __func__, ##arg);                               \
  66 } while (0)
  67 /* ----------------------------------------------------------- */
  68
  69 static const char * const aud_ctl_names[64] = {
  70         [EN_BTSC_FORCE_MONO] = "BTSC_FORCE_MONO",
  71         [EN_BTSC_FORCE_STEREO] = "BTSC_FORCE_STEREO",
  72         [EN_BTSC_FORCE_SAP] = "BTSC_FORCE_SAP",
  73         [EN_BTSC_AUTO_STEREO] = "BTSC_AUTO_STEREO",
  74         [EN_BTSC_AUTO_SAP] = "BTSC_AUTO_SAP",
  75         [EN_A2_FORCE_MONO1] = "A2_FORCE_MONO1",
  76         [EN_A2_FORCE_MONO2] = "A2_FORCE_MONO2",
  77         [EN_A2_FORCE_STEREO] = "A2_FORCE_STEREO",
  78         [EN_A2_AUTO_MONO2] = "A2_AUTO_MONO2",
  79         [EN_A2_AUTO_STEREO] = "A2_AUTO_STEREO",
  80         [EN_EIAJ_FORCE_MONO1] = "EIAJ_FORCE_MONO1",
  81         [EN_EIAJ_FORCE_MONO2] = "EIAJ_FORCE_MONO2",
  82         [EN_EIAJ_FORCE_STEREO] = "EIAJ_FORCE_STEREO",
  83         [EN_EIAJ_AUTO_MONO2] = "EIAJ_AUTO_MONO2",
  84         [EN_EIAJ_AUTO_STEREO] = "EIAJ_AUTO_STEREO",
  85         [EN_NICAM_FORCE_MONO1] = "NICAM_FORCE_MONO1",
  86         [EN_NICAM_FORCE_MONO2] = "NICAM_FORCE_MONO2",
  87         [EN_NICAM_FORCE_STEREO] = "NICAM_FORCE_STEREO",
  88         [EN_NICAM_AUTO_MONO2] = "NICAM_AUTO_MONO2",
  89         [EN_NICAM_AUTO_STEREO] = "NICAM_AUTO_STEREO",
  90         [EN_FMRADIO_FORCE_MONO] = "FMRADIO_FORCE_MONO",
  91         [EN_FMRADIO_FORCE_STEREO] = "FMRADIO_FORCE_STEREO",
  92         [EN_FMRADIO_AUTO_STEREO] = "FMRADIO_AUTO_STEREO",
  93 };
  94
  95 struct rlist {
  96         u32 reg;
  97         u32 val;
  98 };
  99
 100 static void set_audio_registers(struct cx88_core *core, const struct rlist *l)
 101 {
 102         int i;
 103
 104         for (i = 0; l[i].reg; i++) {
 105                 switch (l[i].reg) {
 106                 case AUD_PDF_DDS_CNST_BYTE2:
 107                 case AUD_PDF_DDS_CNST_BYTE1:
 108                 case AUD_PDF_DDS_CNST_BYTE0:
 109                 case AUD_QAM_MODE:
 110                 case AUD_PHACC_FREQ_8MSB:
 111                 case AUD_PHACC_FREQ_8LSB:
 112                         cx_writeb(l[i].reg, l[i].val);
 113                         break;
 114                 default:
 115                         cx_write(l[i].reg, l[i].val);
 116                         break;
 117                 }
 118         }
 119 }
 120
 121 static void set_audio_start(struct cx88_core *core, u32 mode)
 122 {
 123         /* mute */
 124         cx_write(AUD_VOL_CTL, (1 << 6));
 125
 126         /* start programming */
 127         cx_write(AUD_INIT, mode);
 128         cx_write(AUD_INIT_LD, 0x0001);
 129         cx_write(AUD_SOFT_RESET, 0x0001);
 130 }
 131
 132 static void set_audio_finish(struct cx88_core *core, u32 ctl)
 133 {
 134         u32 volume;
 135
 136         /* restart dma; This avoids buzz in NICAM and is good in others  */
 137         cx88_stop_audio_dma(core);
 138         cx_write(AUD_RATE_THRES_DMD, 0x000000C0);
 139         cx88_start_audio_dma(core);
 140
 141         if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
 142                 cx_write(AUD_I2SINPUTCNTL, 4);
 143                 cx_write(AUD_BAUDRATE, 1);
 144                 /* 'pass-thru mode': this enables the i2s output to the mpeg encoder */
 145                 cx_set(AUD_CTL, EN_I2SOUT_ENABLE);
 146                 cx_write(AUD_I2SOUTPUTCNTL, 1);
 147                 cx_write(AUD_I2SCNTL, 0);
 148                 /* cx_write(AUD_APB_IN_RATE_ADJ, 0); */
 149         }
 150         if ((always_analog) || (!(core->board.mpeg & CX88_MPEG_BLACKBIRD))) {
 151                 ctl |= EN_DAC_ENABLE;
 152                 cx_write(AUD_CTL, ctl);
 153         }
 154
 155         /* finish programming */
 156         cx_write(AUD_SOFT_RESET, 0x0000);
 157
 158         /* unmute */
 159         volume = cx_sread(SHADOW_AUD_VOL_CTL);
 160         cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, volume);
 161
 162         core->last_change = jiffies;
 163 }
 164
 165 /* ----------------------------------------------------------- */
 166
 167 static void set_audio_standard_BTSC(struct cx88_core *core, unsigned int sap,
 168                                     u32 mode)
 169 {
 170         static const struct rlist btsc[] = {
 171                 {AUD_AFE_12DB_EN, 0x00000001},
 172                 {AUD_OUT1_SEL, 0x00000013},
 173                 {AUD_OUT1_SHIFT, 0x00000000},
 174                 {AUD_POLY0_DDS_CONSTANT, 0x0012010c},
 175                 {AUD_DMD_RA_DDS, 0x00c3e7aa},
 176                 {AUD_DBX_IN_GAIN, 0x00004734},
 177                 {AUD_DBX_WBE_GAIN, 0x00004640},
 178                 {AUD_DBX_SE_GAIN, 0x00008d31},
 179                 {AUD_DCOC_0_SRC, 0x0000001a},
 180                 {AUD_IIR1_4_SEL, 0x00000021},
 181                 {AUD_DCOC_PASS_IN, 0x00000003},
 182                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 183                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 184                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 185                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 186                 {AUD_DN0_FREQ, 0x0000283b},
 187                 {AUD_DN2_SRC_SEL, 0x00000008},
 188                 {AUD_DN2_FREQ, 0x00003000},
 189                 {AUD_DN2_AFC, 0x00000002},
 190                 {AUD_DN2_SHFT, 0x00000000},
 191                 {AUD_IIR2_2_SEL, 0x00000020},
 192                 {AUD_IIR2_2_SHIFT, 0x00000000},
 193                 {AUD_IIR2_3_SEL, 0x0000001f},
 194                 {AUD_IIR2_3_SHIFT, 0x00000000},
 195                 {AUD_CRDC1_SRC_SEL, 0x000003ce},
 196                 {AUD_CRDC1_SHIFT, 0x00000000},
 197                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 198                 {AUD_DCOC_1_SRC, 0x0000001b},
 199                 {AUD_DCOC1_SHIFT, 0x00000000},
 200                 {AUD_RDSI_SEL, 0x00000008},
 201                 {AUD_RDSQ_SEL, 0x00000008},
 202                 {AUD_RDSI_SHIFT, 0x00000000},
 203                 {AUD_RDSQ_SHIFT, 0x00000000},
 204                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 205                 { /* end of list */ },
 206         };
 207         static const struct rlist btsc_sap[] = {
 208                 {AUD_AFE_12DB_EN, 0x00000001},
 209                 {AUD_DBX_IN_GAIN, 0x00007200},
 210                 {AUD_DBX_WBE_GAIN, 0x00006200},
 211                 {AUD_DBX_SE_GAIN, 0x00006200},
 212                 {AUD_IIR1_1_SEL, 0x00000000},
 213                 {AUD_IIR1_3_SEL, 0x00000001},
 214                 {AUD_DN1_SRC_SEL, 0x00000007},
 215                 {AUD_IIR1_4_SHIFT, 0x00000006},
 216                 {AUD_IIR2_1_SHIFT, 0x00000000},
 217                 {AUD_IIR2_2_SHIFT, 0x00000000},
 218                 {AUD_IIR3_0_SHIFT, 0x00000000},
 219                 {AUD_IIR3_1_SHIFT, 0x00000000},
 220                 {AUD_IIR3_0_SEL, 0x0000000d},
 221                 {AUD_IIR3_1_SEL, 0x0000000e},
 222                 {AUD_DEEMPH1_SRC_SEL, 0x00000014},
 223                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 224                 {AUD_DEEMPH1_G0, 0x00004000},
 225                 {AUD_DEEMPH1_A0, 0x00000000},
 226                 {AUD_DEEMPH1_B0, 0x00000000},
 227                 {AUD_DEEMPH1_A1, 0x00000000},
 228                 {AUD_DEEMPH1_B1, 0x00000000},
 229                 {AUD_OUT0_SEL, 0x0000003f},
 230                 {AUD_OUT1_SEL, 0x0000003f},
 231                 {AUD_DN1_AFC, 0x00000002},
 232                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 233                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 234                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 235                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 236                 {AUD_IIR1_0_SEL, 0x0000001d},
 237                 {AUD_IIR1_2_SEL, 0x0000001e},
 238                 {AUD_IIR2_1_SEL, 0x00000002},
 239                 {AUD_IIR2_2_SEL, 0x00000004},
 240                 {AUD_IIR3_2_SEL, 0x0000000f},
 241                 {AUD_DCOC2_SHIFT, 0x00000001},
 242                 {AUD_IIR3_2_SHIFT, 0x00000001},
 243                 {AUD_DEEMPH0_SRC_SEL, 0x00000014},
 244                 {AUD_CORDIC_SHIFT_1, 0x00000006},
 245                 {AUD_POLY0_DDS_CONSTANT, 0x000e4db2},
 246                 {AUD_DMD_RA_DDS, 0x00f696e6},
 247                 {AUD_IIR2_3_SEL, 0x00000025},
 248                 {AUD_IIR1_4_SEL, 0x00000021},
 249                 {AUD_DN1_FREQ, 0x0000c965},
 250                 {AUD_DCOC_PASS_IN, 0x00000003},
 251                 {AUD_DCOC_0_SRC, 0x0000001a},
 252                 {AUD_DCOC_1_SRC, 0x0000001b},
 253                 {AUD_DCOC1_SHIFT, 0x00000000},
 254                 {AUD_RDSI_SEL, 0x00000009},
 255                 {AUD_RDSQ_SEL, 0x00000009},
 256                 {AUD_RDSI_SHIFT, 0x00000000},
 257                 {AUD_RDSQ_SHIFT, 0x00000000},
 258                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 259                 { /* end of list */ },
 260         };
 261
 262         mode |= EN_FMRADIO_EN_RDS;
 263
 264         if (sap) {
 265                 dprintk("%s SAP (status: unknown)\n", __func__);
 266                 set_audio_start(core, SEL_SAP);
 267                 set_audio_registers(core, btsc_sap);
 268                 set_audio_finish(core, mode);
 269         } else {
 270                 dprintk("%s (status: known-good)\n", __func__);
 271                 set_audio_start(core, SEL_BTSC);
 272                 set_audio_registers(core, btsc);
 273                 set_audio_finish(core, mode);
 274         }
 275 }
 276
 277 static void set_audio_standard_NICAM(struct cx88_core *core, u32 mode)
 278 {
 279         static const struct rlist nicam_l[] = {
 280                 {AUD_AFE_12DB_EN, 0x00000001},
 281                 {AUD_RATE_ADJ1, 0x00000060},
 282                 {AUD_RATE_ADJ2, 0x000000F9},
 283                 {AUD_RATE_ADJ3, 0x000001CC},
 284                 {AUD_RATE_ADJ4, 0x000002B3},
 285                 {AUD_RATE_ADJ5, 0x00000726},
 286                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 287                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 288                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 289                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 290                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 291                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 292                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 293                 {AUD_DMD_RA_DDS, 0x00C00000},
 294                 {AUD_PLL_INT, 0x0000001E},
 295                 {AUD_PLL_DDS, 0x00000000},
 296                 {AUD_PLL_FRAC, 0x0000E542},
 297                 {AUD_START_TIMER, 0x00000000},
 298                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 299                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 300                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 301                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 302                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 303                 {AUD_QAM_MODE, 0x05},
 304                 {AUD_PHACC_FREQ_8MSB, 0x34},
 305                 {AUD_PHACC_FREQ_8LSB, 0x4C},
 306                 {AUD_DEEMPHGAIN_R, 0x00006680},
 307                 {AUD_RATE_THRES_DMD, 0x000000C0},
 308                 { /* end of list */ },
 309         };
 310
 311         static const struct rlist nicam_bgdki_common[] = {
 312                 {AUD_AFE_12DB_EN, 0x00000001},
 313                 {AUD_RATE_ADJ1, 0x00000010},
 314                 {AUD_RATE_ADJ2, 0x00000040},
 315                 {AUD_RATE_ADJ3, 0x00000100},
 316                 {AUD_RATE_ADJ4, 0x00000400},
 317                 {AUD_RATE_ADJ5, 0x00001000},
 318                 {AUD_ERRLOGPERIOD_R, 0x00000fff},
 319                 {AUD_ERRINTRPTTHSHLD1_R, 0x000003ff},
 320                 {AUD_ERRINTRPTTHSHLD2_R, 0x000000ff},
 321                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000003f},
 322                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 323                 {AUD_DEEMPHGAIN_R, 0x000023c2},
 324                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 325                 {AUD_DEEMPHNUMER2_R, 0x0003023e},
 326                 {AUD_DEEMPHDENOM1_R, 0x0000f3d0},
 327                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 328                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 329                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 330                 {AUD_QAM_MODE, 0x05},
 331                 { /* end of list */ },
 332         };
 333
 334         static const struct rlist nicam_i[] = {
 335                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 336                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 337                 {AUD_PHACC_FREQ_8LSB, 0x93},
 338                 { /* end of list */ },
 339         };
 340
 341         static const struct rlist nicam_default[] = {
 342                 {AUD_PDF_DDS_CNST_BYTE0, 0x16},
 343                 {AUD_PHACC_FREQ_8MSB, 0x34},
 344                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 345                 { /* end of list */ },
 346         };
 347
 348         set_audio_start(core, SEL_NICAM);
 349         switch (core->tvaudio) {
 350         case WW_L:
 351                 dprintk("%s SECAM-L NICAM (status: devel)\n", __func__);
 352                 set_audio_registers(core, nicam_l);
 353                 break;
 354         case WW_I:
 355                 dprintk("%s PAL-I NICAM (status: known-good)\n", __func__);
 356                 set_audio_registers(core, nicam_bgdki_common);
 357                 set_audio_registers(core, nicam_i);
 358                 break;
 359         case WW_NONE:
 360         case WW_BTSC:
 361         case WW_BG:
 362         case WW_DK:
 363         case WW_EIAJ:
 364         case WW_I2SPT:
 365         case WW_FM:
 366         case WW_I2SADC:
 367         case WW_M:
 368                 dprintk("%s PAL-BGDK NICAM (status: known-good)\n", __func__);
 369                 set_audio_registers(core, nicam_bgdki_common);
 370                 set_audio_registers(core, nicam_default);
 371                 break;
 372         }
 373
 374         mode |= EN_DMTRX_LR | EN_DMTRX_BYPASS;
 375         set_audio_finish(core, mode);
 376 }
 377
 378 static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
 379 {
 380         static const struct rlist a2_bgdk_common[] = {
 381                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 382                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 383                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 384                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 385                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 386                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 387                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 388                 {AUD_QAM_MODE, 0x05},
 389                 {AUD_PHACC_FREQ_8MSB, 0x34},
 390                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 391                 {AUD_RATE_ADJ1, 0x00000100},
 392                 {AUD_RATE_ADJ2, 0x00000200},
 393                 {AUD_RATE_ADJ3, 0x00000300},
 394                 {AUD_RATE_ADJ4, 0x00000400},
 395                 {AUD_RATE_ADJ5, 0x00000500},
 396                 {AUD_THR_FR, 0x00000000},
 397                 {AAGC_HYST, 0x0000001a},
 398                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 399                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 400                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 401                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 402                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 403                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 404                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 405                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 406                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 407                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 408                 {AUD_MODE_CHG_TIMER, 0x00000040},
 409                 {AUD_AFE_12DB_EN, 0x00000001},
 410                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 411                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 412                 {AUD_DEEMPH0_G0, 0x00000380},
 413                 {AUD_DEEMPH1_G0, 0x00000380},
 414                 {AUD_DCOC_0_SRC, 0x0000001a},
 415                 {AUD_DCOC0_SHIFT, 0x00000000},
 416                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 417                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 418                 {AUD_DCOC_PASS_IN, 0x00000003},
 419                 {AUD_IIR3_0_SEL, 0x00000021},
 420                 {AUD_DN2_AFC, 0x00000002},
 421                 {AUD_DCOC_1_SRC, 0x0000001b},
 422                 {AUD_DCOC1_SHIFT, 0x00000000},
 423                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 424                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 425                 {AUD_IIR3_1_SEL, 0x00000023},
 426                 {AUD_RDSI_SEL, 0x00000017},
 427                 {AUD_RDSI_SHIFT, 0x00000000},
 428                 {AUD_RDSQ_SEL, 0x00000017},
 429                 {AUD_RDSQ_SHIFT, 0x00000000},
 430                 {AUD_PLL_INT, 0x0000001e},
 431                 {AUD_PLL_DDS, 0x00000000},
 432                 {AUD_PLL_FRAC, 0x0000e542},
 433                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 434                 {AUD_START_TIMER, 0x00000000},
 435                 { /* end of list */ },
 436         };
 437
 438         static const struct rlist a2_bg[] = {
 439                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 440                 {AUD_C1_UP_THR, 0x00007000},
 441                 {AUD_C1_LO_THR, 0x00005400},
 442                 {AUD_C2_UP_THR, 0x00005400},
 443                 {AUD_C2_LO_THR, 0x00003000},
 444                 { /* end of list */ },
 445         };
 446
 447         static const struct rlist a2_dk[] = {
 448                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 449                 {AUD_C1_UP_THR, 0x00007000},
 450                 {AUD_C1_LO_THR, 0x00005400},
 451                 {AUD_C2_UP_THR, 0x00005400},
 452                 {AUD_C2_LO_THR, 0x00003000},
 453                 {AUD_DN0_FREQ, 0x00003a1c},
 454                 {AUD_DN2_FREQ, 0x0000d2e0},
 455                 { /* end of list */ },
 456         };
 457
 458         static const struct rlist a1_i[] = {
 459                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 460                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 461                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 462                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 463                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 464                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 465                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 466                 {AUD_QAM_MODE, 0x05},
 467                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 468                 {AUD_PHACC_FREQ_8LSB, 0x93},
 469                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 470                 {AUD_PLL_INT, 0x0000001e},
 471                 {AUD_PLL_DDS, 0x00000004},
 472                 {AUD_PLL_FRAC, 0x0000e542},
 473                 {AUD_RATE_ADJ1, 0x00000100},
 474                 {AUD_RATE_ADJ2, 0x00000200},
 475                 {AUD_RATE_ADJ3, 0x00000300},
 476                 {AUD_RATE_ADJ4, 0x00000400},
 477                 {AUD_RATE_ADJ5, 0x00000500},
 478                 {AUD_THR_FR, 0x00000000},
 479                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 480                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 481                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 482                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 483                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 484                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 485                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 486                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 487                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 488                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 489                 {AUD_MODE_CHG_TIMER, 0x00000060},
 490                 {AUD_AFE_12DB_EN, 0x00000001},
 491                 {AAGC_HYST, 0x0000000a},
 492                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 493                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 494                 {AUD_C1_UP_THR, 0x00007000},
 495                 {AUD_C1_LO_THR, 0x00005400},
 496                 {AUD_C2_UP_THR, 0x00005400},
 497                 {AUD_C2_LO_THR, 0x00003000},
 498                 {AUD_DCOC_0_SRC, 0x0000001a},
 499                 {AUD_DCOC0_SHIFT, 0x00000000},
 500                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 501                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 502                 {AUD_DCOC_PASS_IN, 0x00000003},
 503                 {AUD_IIR3_0_SEL, 0x00000021},
 504                 {AUD_DN2_AFC, 0x00000002},
 505                 {AUD_DCOC_1_SRC, 0x0000001b},
 506                 {AUD_DCOC1_SHIFT, 0x00000000},
 507                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 508                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 509                 {AUD_IIR3_1_SEL, 0x00000023},
 510                 {AUD_DN0_FREQ, 0x000035a3},
 511                 {AUD_DN2_FREQ, 0x000029c7},
 512                 {AUD_CRDC0_SRC_SEL, 0x00000511},
 513                 {AUD_IIR1_0_SEL, 0x00000001},
 514                 {AUD_IIR1_1_SEL, 0x00000000},
 515                 {AUD_IIR3_2_SEL, 0x00000003},
 516                 {AUD_IIR3_2_SHIFT, 0x00000000},
 517                 {AUD_IIR3_0_SEL, 0x00000002},
 518                 {AUD_IIR2_0_SEL, 0x00000021},
 519                 {AUD_IIR2_0_SHIFT, 0x00000002},
 520                 {AUD_DEEMPH0_SRC_SEL, 0x0000000b},
 521                 {AUD_DEEMPH1_SRC_SEL, 0x0000000b},
 522                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 523                 {AUD_START_TIMER, 0x00000000},
 524                 { /* end of list */ },
 525         };
 526
 527         static const struct rlist am_l[] = {
 528                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 529                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 530                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 531                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 532                 {AUD_PDF_DDS_CNST_BYTE2, 0x48},
 533                 {AUD_PDF_DDS_CNST_BYTE1, 0x3D},
 534                 {AUD_QAM_MODE, 0x00},
 535                 {AUD_PDF_DDS_CNST_BYTE0, 0xf5},
 536                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 537                 {AUD_PHACC_FREQ_8LSB, 0x4a},
 538                 {AUD_DEEMPHGAIN_R, 0x00006680},
 539                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 540                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 541                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 542                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 543                 {AUD_FM_MODE_ENABLE, 0x00000007},
 544                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 545                 {AUD_AFE_12DB_EN, 0x00000001},
 546                 {AAGC_GAIN, 0x00000000},
 547                 {AAGC_HYST, 0x00000018},
 548                 {AAGC_DEF, 0x00000020},
 549                 {AUD_DN0_FREQ, 0x00000000},
 550                 {AUD_POLY0_DDS_CONSTANT, 0x000E4DB2},
 551                 {AUD_DCOC_0_SRC, 0x00000021},
 552                 {AUD_IIR1_0_SEL, 0x00000000},
 553                 {AUD_IIR1_0_SHIFT, 0x00000007},
 554                 {AUD_IIR1_1_SEL, 0x00000002},
 555                 {AUD_IIR1_1_SHIFT, 0x00000000},
 556                 {AUD_DCOC_1_SRC, 0x00000003},
 557                 {AUD_DCOC1_SHIFT, 0x00000000},
 558                 {AUD_DCOC_PASS_IN, 0x00000000},
 559                 {AUD_IIR1_2_SEL, 0x00000023},
 560                 {AUD_IIR1_2_SHIFT, 0x00000000},
 561                 {AUD_IIR1_3_SEL, 0x00000004},
 562                 {AUD_IIR1_3_SHIFT, 0x00000007},
 563                 {AUD_IIR1_4_SEL, 0x00000005},
 564                 {AUD_IIR1_4_SHIFT, 0x00000007},
 565                 {AUD_IIR3_0_SEL, 0x00000007},
 566                 {AUD_IIR3_0_SHIFT, 0x00000000},
 567                 {AUD_DEEMPH0_SRC_SEL, 0x00000011},
 568                 {AUD_DEEMPH0_SHIFT, 0x00000000},
 569                 {AUD_DEEMPH0_G0, 0x00007000},
 570                 {AUD_DEEMPH0_A0, 0x00000000},
 571                 {AUD_DEEMPH0_B0, 0x00000000},
 572                 {AUD_DEEMPH0_A1, 0x00000000},
 573                 {AUD_DEEMPH0_B1, 0x00000000},
 574                 {AUD_DEEMPH1_SRC_SEL, 0x00000011},
 575                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 576                 {AUD_DEEMPH1_G0, 0x00007000},
 577                 {AUD_DEEMPH1_A0, 0x00000000},
 578                 {AUD_DEEMPH1_B0, 0x00000000},
 579                 {AUD_DEEMPH1_A1, 0x00000000},
 580                 {AUD_DEEMPH1_B1, 0x00000000},
 581                 {AUD_OUT0_SEL, 0x0000003F},
 582                 {AUD_OUT1_SEL, 0x0000003F},
 583                 {AUD_DMD_RA_DDS, 0x00F5C285},
 584                 {AUD_PLL_INT, 0x0000001E},
 585                 {AUD_PLL_DDS, 0x00000000},
 586                 {AUD_PLL_FRAC, 0x0000E542},
 587                 {AUD_RATE_ADJ1, 0x00000100},
 588                 {AUD_RATE_ADJ2, 0x00000200},
 589                 {AUD_RATE_ADJ3, 0x00000300},
 590                 {AUD_RATE_ADJ4, 0x00000400},
 591                 {AUD_RATE_ADJ5, 0x00000500},
 592                 {AUD_RATE_THRES_DMD, 0x000000C0},
 593                 { /* end of list */ },
 594         };
 595
 596         static const struct rlist a2_deemph50[] = {
 597                 {AUD_DEEMPH0_G0, 0x00000380},
 598                 {AUD_DEEMPH1_G0, 0x00000380},
 599                 {AUD_DEEMPHGAIN_R, 0x000011e1},
 600                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 601                 {AUD_DEEMPHNUMER2_R, 0x0003023c},
 602                 { /* end of list */ },
 603         };
 604
 605         set_audio_start(core, SEL_A2);
 606         switch (core->tvaudio) {
 607         case WW_BG:
 608                 dprintk("%s PAL-BG A1/2 (status: known-good)\n", __func__);
 609                 set_audio_registers(core, a2_bgdk_common);
 610                 set_audio_registers(core, a2_bg);
 611                 set_audio_registers(core, a2_deemph50);
 612                 break;
 613         case WW_DK:
 614                 dprintk("%s PAL-DK A1/2 (status: known-good)\n", __func__);
 615                 set_audio_registers(core, a2_bgdk_common);
 616                 set_audio_registers(core, a2_dk);
 617                 set_audio_registers(core, a2_deemph50);
 618                 break;
 619         case WW_I:
 620                 dprintk("%s PAL-I A1 (status: known-good)\n", __func__);
 621                 set_audio_registers(core, a1_i);
 622                 set_audio_registers(core, a2_deemph50);
 623                 break;
 624         case WW_L:
 625                 dprintk("%s AM-L (status: devel)\n", __func__);
 626                 set_audio_registers(core, am_l);
 627                 break;
 628         case WW_NONE:
 629         case WW_BTSC:
 630         case WW_EIAJ:
 631         case WW_I2SPT:
 632         case WW_FM:
 633         case WW_I2SADC:
 634         case WW_M:
 635                 dprintk("%s Warning: wrong value\n", __func__);
 636                 return;
 637                 break;
 638         }
 639
 640         mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
 641         set_audio_finish(core, mode);
 642 }
 643
 644 static void set_audio_standard_EIAJ(struct cx88_core *core)
 645 {
 646         static const struct rlist eiaj[] = {
 647                 /* TODO: eiaj register settings are not there yet ... */
 648
 649                 { /* end of list */ },
 650         };
 651         dprintk("%s (status: unknown)\n", __func__);
 652
 653         set_audio_start(core, SEL_EIAJ);
 654         set_audio_registers(core, eiaj);
 655         set_audio_finish(core, EN_EIAJ_AUTO_STEREO);
 656 }
 657
 658 static void set_audio_standard_FM(struct cx88_core *core,
 659                                   enum cx88_deemph_type deemph)
 660 {
 661         static const struct rlist fm_deemph_50[] = {
 662                 {AUD_DEEMPH0_G0, 0x0C45},
 663                 {AUD_DEEMPH0_A0, 0x6262},
 664                 {AUD_DEEMPH0_B0, 0x1C29},
 665                 {AUD_DEEMPH0_A1, 0x3FC66},
 666                 {AUD_DEEMPH0_B1, 0x399A},
 667
 668                 {AUD_DEEMPH1_G0, 0x0D80},
 669                 {AUD_DEEMPH1_A0, 0x6262},
 670                 {AUD_DEEMPH1_B0, 0x1C29},
 671                 {AUD_DEEMPH1_A1, 0x3FC66},
 672                 {AUD_DEEMPH1_B1, 0x399A},
 673
 674                 {AUD_POLYPH80SCALEFAC, 0x0003},
 675                 { /* end of list */ },
 676         };
 677         static const struct rlist fm_deemph_75[] = {
 678                 {AUD_DEEMPH0_G0, 0x091B},
 679                 {AUD_DEEMPH0_A0, 0x6B68},
 680                 {AUD_DEEMPH0_B0, 0x11EC},
 681                 {AUD_DEEMPH0_A1, 0x3FC66},
 682                 {AUD_DEEMPH0_B1, 0x399A},
 683
 684                 {AUD_DEEMPH1_G0, 0x0AA0},
 685                 {AUD_DEEMPH1_A0, 0x6B68},
 686                 {AUD_DEEMPH1_B0, 0x11EC},
 687                 {AUD_DEEMPH1_A1, 0x3FC66},
 688                 {AUD_DEEMPH1_B1, 0x399A},
 689
 690                 {AUD_POLYPH80SCALEFAC, 0x0003},
 691                 { /* end of list */ },
 692         };
 693
 694         /* It is enough to leave default values? */
 695         /* No, it's not!  The deemphasis registers are reset to the 75us
 696          * values by default.  Analyzing the spectrum of the decoded audio
 697          * reveals that "no deemphasis" is the same as 75 us, while the 50 us
 698          * setting results in less deemphasis.  */
 699         static const struct rlist fm_no_deemph[] = {
 700
 701                 {AUD_POLYPH80SCALEFAC, 0x0003},
 702                 { /* end of list */ },
 703         };
 704
 705         dprintk("%s (status: unknown)\n", __func__);
 706         set_audio_start(core, SEL_FMRADIO);
 707
 708         switch (deemph) {
 709         default:
 710         case FM_NO_DEEMPH:
 711                 set_audio_registers(core, fm_no_deemph);
 712                 break;
 713
 714         case FM_DEEMPH_50:
 715                 set_audio_registers(core, fm_deemph_50);
 716                 break;
 717
 718         case FM_DEEMPH_75:
 719                 set_audio_registers(core, fm_deemph_75);
 720                 break;
 721         }
 722
 723         set_audio_finish(core, EN_FMRADIO_AUTO_STEREO);
 724 }
 725
 726 /* ----------------------------------------------------------- */
 727
 728 static int cx88_detect_nicam(struct cx88_core *core)
 729 {
 730         int i, j = 0;
 731
 732         dprintk("start nicam autodetect.\n");
 733
 734         for (i = 0; i < 6; i++) {
 735                 /* if bit1=1 then nicam is detected */
 736                 j += ((cx_read(AUD_NICAM_STATUS2) & 0x02) >> 1);
 737
 738                 if (j == 1) {
 739                         dprintk("nicam is detected.\n");
 740                         return 1;
 741                 }
 742
 743                 /* wait a little bit for next reading status */
 744                 msleep(10);
 745         }
 746
 747         dprintk("nicam is not detected.\n");
 748         return 0;
 749 }
 750
 751 void cx88_set_tvaudio(struct cx88_core *core)
 752 {
 753         switch (core->tvaudio) {
 754         case WW_BTSC:
 755                 set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 756                 break;
 757         case WW_BG:
 758         case WW_DK:
 759         case WW_M:
 760         case WW_I:
 761         case WW_L:
 762                 /* prepare all dsp registers */
 763                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 764
 765                 /* set nicam mode - otherwise
 766                    AUD_NICAM_STATUS2 contains wrong values */
 767                 set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
 768                 if (cx88_detect_nicam(core) == 0) {
 769                         /* fall back to fm / am mono */
 770                         set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 771                         core->audiomode_current = V4L2_TUNER_MODE_MONO;
 772                         core->use_nicam = 0;
 773                 } else {
 774                         core->use_nicam = 1;
 775                 }
 776                 break;
 777         case WW_EIAJ:
 778                 set_audio_standard_EIAJ(core);
 779                 break;
 780         case WW_FM:
 781                 set_audio_standard_FM(core, radio_deemphasis);
 782                 break;
 783         case WW_I2SADC:
 784                 set_audio_start(core, 0x01);
 785                 /*
 786                  * Slave/Philips/Autobaud
 787                  * NB on Nova-S bit1 NPhilipsSony appears to be inverted:
 788                  *      0= Sony, 1=Philips
 789                  */
 790                 cx_write(AUD_I2SINPUTCNTL, core->board.i2sinputcntl);
 791                 /* Switch to "I2S ADC mode" */
 792                 cx_write(AUD_I2SCNTL, 0x1);
 793                 set_audio_finish(core, EN_I2SIN_ENABLE);
 794                 break;
 795         case WW_NONE:
 796         case WW_I2SPT:
 797                 pr_info("unknown tv audio mode [%d]\n", core->tvaudio);
 798                 break;
 799         }
 800         return;
 801 }
 802
 803 void cx88_newstation(struct cx88_core *core)
 804 {
 805         core->audiomode_manual = UNSET;
 806         core->last_change = jiffies;
 807 }
 808
 809 void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
 810 {
 811         static const char * const m[] = { "stereo", "dual mono", "mono", "sap" };
 812         static const char * const p[] = { "no pilot", "pilot c1", "pilot c2", "?" };
 813         u32 reg, mode, pilot;
 814
 815         reg = cx_read(AUD_STATUS);
 816         mode = reg & 0x03;
 817         pilot = (reg >> 2) & 0x03;
 818
 819         if (core->astat != reg)
 820                 dprintk("AUD_STATUS: 0x%x [%s/%s] ctl=%s\n",
 821                         reg, m[mode], p[pilot],
 822                         aud_ctl_names[cx_read(AUD_CTL) & 63]);
 823         core->astat = reg;
 824
 825         t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP |
 826             V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
 827         t->rxsubchans = UNSET;
 828         t->audmode = V4L2_TUNER_MODE_MONO;
 829
 830         switch (mode) {
 831         case 0:
 832                 t->audmode = V4L2_TUNER_MODE_STEREO;
 833                 break;
 834         case 1:
 835                 t->audmode = V4L2_TUNER_MODE_LANG2;
 836                 break;
 837         case 2:
 838                 t->audmode = V4L2_TUNER_MODE_MONO;
 839                 break;
 840         case 3:
 841                 t->audmode = V4L2_TUNER_MODE_SAP;
 842                 break;
 843         }
 844
 845         switch (core->tvaudio) {
 846         case WW_BTSC:
 847         case WW_BG:
 848         case WW_DK:
 849         case WW_M:
 850         case WW_EIAJ:
 851                 if (!core->use_nicam) {
 852                         t->rxsubchans = cx88_dsp_detect_stereo_sap(core);
 853                         break;
 854                 }
 855                 break;
 856         case WW_NONE:
 857         case WW_I:
 858         case WW_L:
 859         case WW_I2SPT:
 860         case WW_FM:
 861         case WW_I2SADC:
 862                 /* nothing */
 863                 break;
 864         }
 865
 866         /* If software stereo detection is not supported... */
 867         if (t->rxsubchans == UNSET) {
 868                 t->rxsubchans = V4L2_TUNER_SUB_MONO;
 869                 /* If the hardware itself detected stereo, also return
 870                    stereo as an available subchannel */
 871                 if (t->audmode == V4L2_TUNER_MODE_STEREO)
 872                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 873         }
 874         return;
 875 }
 876
 877 void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
 878 {
 879         u32 ctl = UNSET;
 880         u32 mask = UNSET;
 881
 882         if (manual) {
 883                 core->audiomode_manual = mode;
 884         } else {
 885                 if (core->audiomode_manual != UNSET)
 886                         return;
 887         }
 888         core->audiomode_current = mode;
 889
 890         switch (core->tvaudio) {
 891         case WW_BTSC:
 892                 switch (mode) {
 893                 case V4L2_TUNER_MODE_MONO:
 894                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_MONO);
 895                         break;
 896                 case V4L2_TUNER_MODE_LANG1:
 897                         set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 898                         break;
 899                 case V4L2_TUNER_MODE_LANG2:
 900                         set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
 901                         break;
 902                 case V4L2_TUNER_MODE_STEREO:
 903                 case V4L2_TUNER_MODE_LANG1_LANG2:
 904                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
 905                         break;
 906                 }
 907                 break;
 908         case WW_BG:
 909         case WW_DK:
 910         case WW_M:
 911         case WW_I:
 912         case WW_L:
 913                 if (core->use_nicam == 1) {
 914                         switch (mode) {
 915                         case V4L2_TUNER_MODE_MONO:
 916                         case V4L2_TUNER_MODE_LANG1:
 917                                 set_audio_standard_NICAM(core,
 918                                                          EN_NICAM_FORCE_MONO1);
 919                                 break;
 920                         case V4L2_TUNER_MODE_LANG2:
 921                                 set_audio_standard_NICAM(core,
 922                                                          EN_NICAM_FORCE_MONO2);
 923                                 break;
 924                         case V4L2_TUNER_MODE_STEREO:
 925                         case V4L2_TUNER_MODE_LANG1_LANG2:
 926                                 set_audio_standard_NICAM(core,
 927                                                          EN_NICAM_FORCE_STEREO);
 928                                 break;
 929                         }
 930                 } else {
 931                         if ((core->tvaudio == WW_I) || (core->tvaudio == WW_L)) {
 932                                 /* fall back to fm / am mono */
 933                                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 934                         } else {
 935                                 /* TODO: Add A2 autodection */
 936                                 mask = 0x3f;
 937                                 switch (mode) {
 938                                 case V4L2_TUNER_MODE_MONO:
 939                                 case V4L2_TUNER_MODE_LANG1:
 940                                         ctl = EN_A2_FORCE_MONO1;
 941                                         break;
 942                                 case V4L2_TUNER_MODE_LANG2:
 943                                         ctl = EN_A2_FORCE_MONO2;
 944                                         break;
 945                                 case V4L2_TUNER_MODE_STEREO:
 946                                 case V4L2_TUNER_MODE_LANG1_LANG2:
 947                                         ctl = EN_A2_FORCE_STEREO;
 948                                         break;
 949                                 }
 950                         }
 951                 }
 952                 break;
 953         case WW_FM:
 954                 switch (mode) {
 955                 case V4L2_TUNER_MODE_MONO:
 956                         ctl = EN_FMRADIO_FORCE_MONO;
 957                         mask = 0x3f;
 958                         break;
 959                 case V4L2_TUNER_MODE_STEREO:
 960                         ctl = EN_FMRADIO_AUTO_STEREO;
 961                         mask = 0x3f;
 962                         break;
 963                 }
 964                 break;
 965         case WW_I2SADC:
 966         case WW_NONE:
 967         case WW_EIAJ:
 968         case WW_I2SPT:
 969                 /* DO NOTHING */
 970                 break;
 971         }
 972
 973         if (ctl != UNSET) {
 974                 dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x [status=0x%x,ctl=0x%x,vol=0x%x]\n",
 975                         mask, ctl, cx_read(AUD_STATUS),
 976                         cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
 977                 cx_andor(AUD_CTL, mask, ctl);
 978         }
 979         return;
 980 }
 981
 982 int cx88_audio_thread(void *data)
 983 {
 984         struct cx88_core *core = data;
 985         struct v4l2_tuner t;
 986         u32 mode = 0;
 987
 988         dprintk("cx88: tvaudio thread started\n");
 989         set_freezable();
 990         for (;;) {
 991                 msleep_interruptible(1000);
 992                 if (kthread_should_stop())
 993                         break;
 994                 try_to_freeze();
 995
 996                 switch (core->tvaudio) {
 997                 case WW_BG:
 998                 case WW_DK:
 999                 case WW_M:
1000                 case WW_I:
1001                 case WW_L:
1002                         if (core->use_nicam)
1003                                 goto hw_autodetect;
1004
1005                         /* just monitor the audio status for now ... */
1006                         memset(&t, 0, sizeof(t));
1007                         cx88_get_stereo(core, &t);
1008
1009                         if (core->audiomode_manual != UNSET)
1010                                 /* manually set, don't do anything. */
1011                                 continue;
1012
1013                         /* monitor signal and set stereo if available */
1014                         if (t.rxsubchans & V4L2_TUNER_SUB_STEREO)
1015                                 mode = V4L2_TUNER_MODE_STEREO;
1016                         else
1017                                 mode = V4L2_TUNER_MODE_MONO;
1018                         if (mode == core->audiomode_current)
1019                                 continue;
1020                         /* automatically switch to best available mode */
1021                         cx88_set_stereo(core, mode, 0);
1022                         break;
1023                 case WW_NONE:
1024                 case WW_BTSC:
1025                 case WW_EIAJ:
1026                 case WW_I2SPT:
1027                 case WW_FM:
1028                 case WW_I2SADC:
1029 hw_autodetect:
1030                         /* stereo autodetection is supported by hardware so
1031                            we don't need to do it manually. Do nothing. */
1032                         break;
1033                 }
1034         }
1035
1036         dprintk("cx88: tvaudio thread exiting\n");
1037         return 0;
1038 }
1039
1040 /* ----------------------------------------------------------- */
1041
1042 EXPORT_SYMBOL(cx88_set_tvaudio);
1043 EXPORT_SYMBOL(cx88_newstation);
1044 EXPORT_SYMBOL(cx88_set_stereo);
1045 EXPORT_SYMBOL(cx88_get_stereo);
1046 EXPORT_SYMBOL(cx88_audio_thread);