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

   1 /*
   2
   3     cx88x-audio.c - Conexant CX23880/23881 audio downstream driver driver
   4
   5      (c) 2001 Michael Eskin, Tom Zakrajsek [Windows version]
   6      (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
   7      (c) 2003 Gerd Knorr <kraxel@bytesex.org>
   8
   9     -----------------------------------------------------------------------
  10
  11     Lot of voodoo here.  Even the data sheet doesn't help to
  12     understand what is going on here, the documentation for the audio
  13     part of the cx2388x chip is *very* bad.
  14
  15     Some of this comes from party done linux driver sources I got from
  16     [undocumented].
  17
  18     Some comes from the dscaler sources, one of the dscaler driver guy works
  19     for Conexant ...
  20
  21     -----------------------------------------------------------------------
  22
  23     This program is free software; you can redistribute it and/or modify
  24     it under the terms of the GNU General Public License as published by
  25     the Free Software Foundation; either version 2 of the License, or
  26     (at your option) any later version.
  27
  28     This program is distributed in the hope that it will be useful,
  29     but WITHOUT ANY WARRANTY; without even the implied warranty of
  30     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31     GNU General Public License for more details.
  32
  33     You should have received a copy of the GNU General Public License
  34     along with this program; if not, write to the Free Software
  35     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  36 */
  37
  38 #include <linux/module.h>
  39 #include <linux/errno.h>
  40 #include <linux/freezer.h>
  41 #include <linux/kernel.h>
  42 #include <linux/mm.h>
  43 #include <linux/poll.h>
  44 #include <linux/signal.h>
  45 #include <linux/ioport.h>
  46 #include <linux/types.h>
  47 #include <linux/interrupt.h>
  48 #include <linux/vmalloc.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/kthread.h>
  52
  53 #include "cx88.h"
  54
  55 static unsigned int audio_debug;
  56 module_param(audio_debug, int, 0644);
  57 MODULE_PARM_DESC(audio_debug, "enable debug messages [audio]");
  58
  59 static unsigned int always_analog;
  60 module_param(always_analog,int,0644);
  61 MODULE_PARM_DESC(always_analog,"force analog audio out");
  62
  63 static unsigned int radio_deemphasis;
  64 module_param(radio_deemphasis,int,0644);
  65 MODULE_PARM_DESC(radio_deemphasis, "Radio deemphasis time constant, "
  66                  "0=None, 1=50us (elsewhere), 2=75us (USA)");
  67
  68 #define dprintk(fmt, arg...)    if (audio_debug) \
  69         printk(KERN_DEBUG "%s/0: " fmt, core->name , ## arg)
  70
  71 /* ----------------------------------------------------------- */
  72
  73 static const char * const aud_ctl_names[64] = {
  74         [EN_BTSC_FORCE_MONO] = "BTSC_FORCE_MONO",
  75         [EN_BTSC_FORCE_STEREO] = "BTSC_FORCE_STEREO",
  76         [EN_BTSC_FORCE_SAP] = "BTSC_FORCE_SAP",
  77         [EN_BTSC_AUTO_STEREO] = "BTSC_AUTO_STEREO",
  78         [EN_BTSC_AUTO_SAP] = "BTSC_AUTO_SAP",
  79         [EN_A2_FORCE_MONO1] = "A2_FORCE_MONO1",
  80         [EN_A2_FORCE_MONO2] = "A2_FORCE_MONO2",
  81         [EN_A2_FORCE_STEREO] = "A2_FORCE_STEREO",
  82         [EN_A2_AUTO_MONO2] = "A2_AUTO_MONO2",
  83         [EN_A2_AUTO_STEREO] = "A2_AUTO_STEREO",
  84         [EN_EIAJ_FORCE_MONO1] = "EIAJ_FORCE_MONO1",
  85         [EN_EIAJ_FORCE_MONO2] = "EIAJ_FORCE_MONO2",
  86         [EN_EIAJ_FORCE_STEREO] = "EIAJ_FORCE_STEREO",
  87         [EN_EIAJ_AUTO_MONO2] = "EIAJ_AUTO_MONO2",
  88         [EN_EIAJ_AUTO_STEREO] = "EIAJ_AUTO_STEREO",
  89         [EN_NICAM_FORCE_MONO1] = "NICAM_FORCE_MONO1",
  90         [EN_NICAM_FORCE_MONO2] = "NICAM_FORCE_MONO2",
  91         [EN_NICAM_FORCE_STEREO] = "NICAM_FORCE_STEREO",
  92         [EN_NICAM_AUTO_MONO2] = "NICAM_AUTO_MONO2",
  93         [EN_NICAM_AUTO_STEREO] = "NICAM_AUTO_STEREO",
  94         [EN_FMRADIO_FORCE_MONO] = "FMRADIO_FORCE_MONO",
  95         [EN_FMRADIO_FORCE_STEREO] = "FMRADIO_FORCE_STEREO",
  96         [EN_FMRADIO_AUTO_STEREO] = "FMRADIO_AUTO_STEREO",
  97 };
  98
  99 struct rlist {
 100         u32 reg;
 101         u32 val;
 102 };
 103
 104 static void set_audio_registers(struct cx88_core *core, const struct rlist *l)
 105 {
 106         int i;
 107
 108         for (i = 0; l[i].reg; i++) {
 109                 switch (l[i].reg) {
 110                 case AUD_PDF_DDS_CNST_BYTE2:
 111                 case AUD_PDF_DDS_CNST_BYTE1:
 112                 case AUD_PDF_DDS_CNST_BYTE0:
 113                 case AUD_QAM_MODE:
 114                 case AUD_PHACC_FREQ_8MSB:
 115                 case AUD_PHACC_FREQ_8LSB:
 116                         cx_writeb(l[i].reg, l[i].val);
 117                         break;
 118                 default:
 119                         cx_write(l[i].reg, l[i].val);
 120                         break;
 121                 }
 122         }
 123 }
 124
 125 static void set_audio_start(struct cx88_core *core, u32 mode)
 126 {
 127         /* mute */
 128         cx_write(AUD_VOL_CTL, (1 << 6));
 129
 130         /* start programming */
 131         cx_write(AUD_INIT, mode);
 132         cx_write(AUD_INIT_LD, 0x0001);
 133         cx_write(AUD_SOFT_RESET, 0x0001);
 134 }
 135
 136 static void set_audio_finish(struct cx88_core *core, u32 ctl)
 137 {
 138         u32 volume;
 139
 140         /* restart dma; This avoids buzz in NICAM and is good in others  */
 141         cx88_stop_audio_dma(core);
 142         cx_write(AUD_RATE_THRES_DMD, 0x000000C0);
 143         cx88_start_audio_dma(core);
 144
 145         if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
 146                 cx_write(AUD_I2SINPUTCNTL, 4);
 147                 cx_write(AUD_BAUDRATE, 1);
 148                 /* 'pass-thru mode': this enables the i2s output to the mpeg encoder */
 149                 cx_set(AUD_CTL, EN_I2SOUT_ENABLE);
 150                 cx_write(AUD_I2SOUTPUTCNTL, 1);
 151                 cx_write(AUD_I2SCNTL, 0);
 152                 /* cx_write(AUD_APB_IN_RATE_ADJ, 0); */
 153         }
 154         if ((always_analog) || (!(core->board.mpeg & CX88_MPEG_BLACKBIRD))) {
 155                 ctl |= EN_DAC_ENABLE;
 156                 cx_write(AUD_CTL, ctl);
 157         }
 158
 159         /* finish programming */
 160         cx_write(AUD_SOFT_RESET, 0x0000);
 161
 162         /* unmute */
 163         volume = cx_sread(SHADOW_AUD_VOL_CTL);
 164         cx_swrite(SHADOW_AUD_VOL_CTL, AUD_VOL_CTL, volume);
 165
 166         core->last_change = jiffies;
 167 }
 168
 169 /* ----------------------------------------------------------- */
 170
 171 static void set_audio_standard_BTSC(struct cx88_core *core, unsigned int sap,
 172                                     u32 mode)
 173 {
 174         static const struct rlist btsc[] = {
 175                 {AUD_AFE_12DB_EN, 0x00000001},
 176                 {AUD_OUT1_SEL, 0x00000013},
 177                 {AUD_OUT1_SHIFT, 0x00000000},
 178                 {AUD_POLY0_DDS_CONSTANT, 0x0012010c},
 179                 {AUD_DMD_RA_DDS, 0x00c3e7aa},
 180                 {AUD_DBX_IN_GAIN, 0x00004734},
 181                 {AUD_DBX_WBE_GAIN, 0x00004640},
 182                 {AUD_DBX_SE_GAIN, 0x00008d31},
 183                 {AUD_DCOC_0_SRC, 0x0000001a},
 184                 {AUD_IIR1_4_SEL, 0x00000021},
 185                 {AUD_DCOC_PASS_IN, 0x00000003},
 186                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 187                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 188                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 189                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 190                 {AUD_DN0_FREQ, 0x0000283b},
 191                 {AUD_DN2_SRC_SEL, 0x00000008},
 192                 {AUD_DN2_FREQ, 0x00003000},
 193                 {AUD_DN2_AFC, 0x00000002},
 194                 {AUD_DN2_SHFT, 0x00000000},
 195                 {AUD_IIR2_2_SEL, 0x00000020},
 196                 {AUD_IIR2_2_SHIFT, 0x00000000},
 197                 {AUD_IIR2_3_SEL, 0x0000001f},
 198                 {AUD_IIR2_3_SHIFT, 0x00000000},
 199                 {AUD_CRDC1_SRC_SEL, 0x000003ce},
 200                 {AUD_CRDC1_SHIFT, 0x00000000},
 201                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 202                 {AUD_DCOC_1_SRC, 0x0000001b},
 203                 {AUD_DCOC1_SHIFT, 0x00000000},
 204                 {AUD_RDSI_SEL, 0x00000008},
 205                 {AUD_RDSQ_SEL, 0x00000008},
 206                 {AUD_RDSI_SHIFT, 0x00000000},
 207                 {AUD_RDSQ_SHIFT, 0x00000000},
 208                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 209                 { /* end of list */ },
 210         };
 211         static const struct rlist btsc_sap[] = {
 212                 {AUD_AFE_12DB_EN, 0x00000001},
 213                 {AUD_DBX_IN_GAIN, 0x00007200},
 214                 {AUD_DBX_WBE_GAIN, 0x00006200},
 215                 {AUD_DBX_SE_GAIN, 0x00006200},
 216                 {AUD_IIR1_1_SEL, 0x00000000},
 217                 {AUD_IIR1_3_SEL, 0x00000001},
 218                 {AUD_DN1_SRC_SEL, 0x00000007},
 219                 {AUD_IIR1_4_SHIFT, 0x00000006},
 220                 {AUD_IIR2_1_SHIFT, 0x00000000},
 221                 {AUD_IIR2_2_SHIFT, 0x00000000},
 222                 {AUD_IIR3_0_SHIFT, 0x00000000},
 223                 {AUD_IIR3_1_SHIFT, 0x00000000},
 224                 {AUD_IIR3_0_SEL, 0x0000000d},
 225                 {AUD_IIR3_1_SEL, 0x0000000e},
 226                 {AUD_DEEMPH1_SRC_SEL, 0x00000014},
 227                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 228                 {AUD_DEEMPH1_G0, 0x00004000},
 229                 {AUD_DEEMPH1_A0, 0x00000000},
 230                 {AUD_DEEMPH1_B0, 0x00000000},
 231                 {AUD_DEEMPH1_A1, 0x00000000},
 232                 {AUD_DEEMPH1_B1, 0x00000000},
 233                 {AUD_OUT0_SEL, 0x0000003f},
 234                 {AUD_OUT1_SEL, 0x0000003f},
 235                 {AUD_DN1_AFC, 0x00000002},
 236                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 237                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 238                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 239                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 240                 {AUD_IIR1_0_SEL, 0x0000001d},
 241                 {AUD_IIR1_2_SEL, 0x0000001e},
 242                 {AUD_IIR2_1_SEL, 0x00000002},
 243                 {AUD_IIR2_2_SEL, 0x00000004},
 244                 {AUD_IIR3_2_SEL, 0x0000000f},
 245                 {AUD_DCOC2_SHIFT, 0x00000001},
 246                 {AUD_IIR3_2_SHIFT, 0x00000001},
 247                 {AUD_DEEMPH0_SRC_SEL, 0x00000014},
 248                 {AUD_CORDIC_SHIFT_1, 0x00000006},
 249                 {AUD_POLY0_DDS_CONSTANT, 0x000e4db2},
 250                 {AUD_DMD_RA_DDS, 0x00f696e6},
 251                 {AUD_IIR2_3_SEL, 0x00000025},
 252                 {AUD_IIR1_4_SEL, 0x00000021},
 253                 {AUD_DN1_FREQ, 0x0000c965},
 254                 {AUD_DCOC_PASS_IN, 0x00000003},
 255                 {AUD_DCOC_0_SRC, 0x0000001a},
 256                 {AUD_DCOC_1_SRC, 0x0000001b},
 257                 {AUD_DCOC1_SHIFT, 0x00000000},
 258                 {AUD_RDSI_SEL, 0x00000009},
 259                 {AUD_RDSQ_SEL, 0x00000009},
 260                 {AUD_RDSI_SHIFT, 0x00000000},
 261                 {AUD_RDSQ_SHIFT, 0x00000000},
 262                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 263                 { /* end of list */ },
 264         };
 265
 266         mode |= EN_FMRADIO_EN_RDS;
 267
 268         if (sap) {
 269                 dprintk("%s SAP (status: unknown)\n", __func__);
 270                 set_audio_start(core, SEL_SAP);
 271                 set_audio_registers(core, btsc_sap);
 272                 set_audio_finish(core, mode);
 273         } else {
 274                 dprintk("%s (status: known-good)\n", __func__);
 275                 set_audio_start(core, SEL_BTSC);
 276                 set_audio_registers(core, btsc);
 277                 set_audio_finish(core, mode);
 278         }
 279 }
 280
 281 static void set_audio_standard_NICAM(struct cx88_core *core, u32 mode)
 282 {
 283         static const struct rlist nicam_l[] = {
 284                 {AUD_AFE_12DB_EN, 0x00000001},
 285                 {AUD_RATE_ADJ1, 0x00000060},
 286                 {AUD_RATE_ADJ2, 0x000000F9},
 287                 {AUD_RATE_ADJ3, 0x000001CC},
 288                 {AUD_RATE_ADJ4, 0x000002B3},
 289                 {AUD_RATE_ADJ5, 0x00000726},
 290                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 291                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 292                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 293                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 294                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 295                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 296                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 297                 {AUD_DMD_RA_DDS, 0x00C00000},
 298                 {AUD_PLL_INT, 0x0000001E},
 299                 {AUD_PLL_DDS, 0x00000000},
 300                 {AUD_PLL_FRAC, 0x0000E542},
 301                 {AUD_START_TIMER, 0x00000000},
 302                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 303                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 304                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 305                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 306                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 307                 {AUD_QAM_MODE, 0x05},
 308                 {AUD_PHACC_FREQ_8MSB, 0x34},
 309                 {AUD_PHACC_FREQ_8LSB, 0x4C},
 310                 {AUD_DEEMPHGAIN_R, 0x00006680},
 311                 {AUD_RATE_THRES_DMD, 0x000000C0},
 312                 { /* end of list */ },
 313         };
 314
 315         static const struct rlist nicam_bgdki_common[] = {
 316                 {AUD_AFE_12DB_EN, 0x00000001},
 317                 {AUD_RATE_ADJ1, 0x00000010},
 318                 {AUD_RATE_ADJ2, 0x00000040},
 319                 {AUD_RATE_ADJ3, 0x00000100},
 320                 {AUD_RATE_ADJ4, 0x00000400},
 321                 {AUD_RATE_ADJ5, 0x00001000},
 322                 {AUD_ERRLOGPERIOD_R, 0x00000fff},
 323                 {AUD_ERRINTRPTTHSHLD1_R, 0x000003ff},
 324                 {AUD_ERRINTRPTTHSHLD2_R, 0x000000ff},
 325                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000003f},
 326                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 327                 {AUD_DEEMPHGAIN_R, 0x000023c2},
 328                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 329                 {AUD_DEEMPHNUMER2_R, 0x0003023e},
 330                 {AUD_DEEMPHDENOM1_R, 0x0000f3d0},
 331                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 332                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 333                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 334                 {AUD_QAM_MODE, 0x05},
 335                 { /* end of list */ },
 336         };
 337
 338         static const struct rlist nicam_i[] = {
 339                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 340                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 341                 {AUD_PHACC_FREQ_8LSB, 0x93},
 342                 { /* end of list */ },
 343         };
 344
 345         static const struct rlist nicam_default[] = {
 346                 {AUD_PDF_DDS_CNST_BYTE0, 0x16},
 347                 {AUD_PHACC_FREQ_8MSB, 0x34},
 348                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 349                 { /* end of list */ },
 350         };
 351
 352         set_audio_start(core,SEL_NICAM);
 353         switch (core->tvaudio) {
 354         case WW_L:
 355                 dprintk("%s SECAM-L NICAM (status: devel)\n", __func__);
 356                 set_audio_registers(core, nicam_l);
 357                 break;
 358         case WW_I:
 359                 dprintk("%s PAL-I NICAM (status: known-good)\n", __func__);
 360                 set_audio_registers(core, nicam_bgdki_common);
 361                 set_audio_registers(core, nicam_i);
 362                 break;
 363         case WW_NONE:
 364         case WW_BTSC:
 365         case WW_BG:
 366         case WW_DK:
 367         case WW_EIAJ:
 368         case WW_I2SPT:
 369         case WW_FM:
 370         case WW_I2SADC:
 371         case WW_M:
 372                 dprintk("%s PAL-BGDK NICAM (status: known-good)\n", __func__);
 373                 set_audio_registers(core, nicam_bgdki_common);
 374                 set_audio_registers(core, nicam_default);
 375                 break;
 376         };
 377
 378         mode |= EN_DMTRX_LR | EN_DMTRX_BYPASS;
 379         set_audio_finish(core, mode);
 380 }
 381
 382 static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
 383 {
 384         static const struct rlist a2_bgdk_common[] = {
 385                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 386                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 387                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 388                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 389                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 390                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 391                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 392                 {AUD_QAM_MODE, 0x05},
 393                 {AUD_PHACC_FREQ_8MSB, 0x34},
 394                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 395                 {AUD_RATE_ADJ1, 0x00000100},
 396                 {AUD_RATE_ADJ2, 0x00000200},
 397                 {AUD_RATE_ADJ3, 0x00000300},
 398                 {AUD_RATE_ADJ4, 0x00000400},
 399                 {AUD_RATE_ADJ5, 0x00000500},
 400                 {AUD_THR_FR, 0x00000000},
 401                 {AAGC_HYST, 0x0000001a},
 402                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 403                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 404                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 405                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 406                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 407                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 408                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 409                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 410                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 411                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 412                 {AUD_MODE_CHG_TIMER, 0x00000040},
 413                 {AUD_AFE_12DB_EN, 0x00000001},
 414                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 415                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 416                 {AUD_DEEMPH0_G0, 0x00000380},
 417                 {AUD_DEEMPH1_G0, 0x00000380},
 418                 {AUD_DCOC_0_SRC, 0x0000001a},
 419                 {AUD_DCOC0_SHIFT, 0x00000000},
 420                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 421                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 422                 {AUD_DCOC_PASS_IN, 0x00000003},
 423                 {AUD_IIR3_0_SEL, 0x00000021},
 424                 {AUD_DN2_AFC, 0x00000002},
 425                 {AUD_DCOC_1_SRC, 0x0000001b},
 426                 {AUD_DCOC1_SHIFT, 0x00000000},
 427                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 428                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 429                 {AUD_IIR3_1_SEL, 0x00000023},
 430                 {AUD_RDSI_SEL, 0x00000017},
 431                 {AUD_RDSI_SHIFT, 0x00000000},
 432                 {AUD_RDSQ_SEL, 0x00000017},
 433                 {AUD_RDSQ_SHIFT, 0x00000000},
 434                 {AUD_PLL_INT, 0x0000001e},
 435                 {AUD_PLL_DDS, 0x00000000},
 436                 {AUD_PLL_FRAC, 0x0000e542},
 437                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 438                 {AUD_START_TIMER, 0x00000000},
 439                 { /* end of list */ },
 440         };
 441
 442         static const struct rlist a2_bg[] = {
 443                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 444                 {AUD_C1_UP_THR, 0x00007000},
 445                 {AUD_C1_LO_THR, 0x00005400},
 446                 {AUD_C2_UP_THR, 0x00005400},
 447                 {AUD_C2_LO_THR, 0x00003000},
 448                 { /* end of list */ },
 449         };
 450
 451         static const struct rlist a2_dk[] = {
 452                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 453                 {AUD_C1_UP_THR, 0x00007000},
 454                 {AUD_C1_LO_THR, 0x00005400},
 455                 {AUD_C2_UP_THR, 0x00005400},
 456                 {AUD_C2_LO_THR, 0x00003000},
 457                 {AUD_DN0_FREQ, 0x00003a1c},
 458                 {AUD_DN2_FREQ, 0x0000d2e0},
 459                 { /* end of list */ },
 460         };
 461
 462         static const struct rlist a1_i[] = {
 463                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 464                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 465                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 466                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 467                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 468                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 469                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 470                 {AUD_QAM_MODE, 0x05},
 471                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 472                 {AUD_PHACC_FREQ_8LSB, 0x93},
 473                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 474                 {AUD_PLL_INT, 0x0000001e},
 475                 {AUD_PLL_DDS, 0x00000004},
 476                 {AUD_PLL_FRAC, 0x0000e542},
 477                 {AUD_RATE_ADJ1, 0x00000100},
 478                 {AUD_RATE_ADJ2, 0x00000200},
 479                 {AUD_RATE_ADJ3, 0x00000300},
 480                 {AUD_RATE_ADJ4, 0x00000400},
 481                 {AUD_RATE_ADJ5, 0x00000500},
 482                 {AUD_THR_FR, 0x00000000},
 483                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 484                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 485                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 486                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 487                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 488                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 489                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 490                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 491                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 492                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 493                 {AUD_MODE_CHG_TIMER, 0x00000060},
 494                 {AUD_AFE_12DB_EN, 0x00000001},
 495                 {AAGC_HYST, 0x0000000a},
 496                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 497                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 498                 {AUD_C1_UP_THR, 0x00007000},
 499                 {AUD_C1_LO_THR, 0x00005400},
 500                 {AUD_C2_UP_THR, 0x00005400},
 501                 {AUD_C2_LO_THR, 0x00003000},
 502                 {AUD_DCOC_0_SRC, 0x0000001a},
 503                 {AUD_DCOC0_SHIFT, 0x00000000},
 504                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 505                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 506                 {AUD_DCOC_PASS_IN, 0x00000003},
 507                 {AUD_IIR3_0_SEL, 0x00000021},
 508                 {AUD_DN2_AFC, 0x00000002},
 509                 {AUD_DCOC_1_SRC, 0x0000001b},
 510                 {AUD_DCOC1_SHIFT, 0x00000000},
 511                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 512                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 513                 {AUD_IIR3_1_SEL, 0x00000023},
 514                 {AUD_DN0_FREQ, 0x000035a3},
 515                 {AUD_DN2_FREQ, 0x000029c7},
 516                 {AUD_CRDC0_SRC_SEL, 0x00000511},
 517                 {AUD_IIR1_0_SEL, 0x00000001},
 518                 {AUD_IIR1_1_SEL, 0x00000000},
 519                 {AUD_IIR3_2_SEL, 0x00000003},
 520                 {AUD_IIR3_2_SHIFT, 0x00000000},
 521                 {AUD_IIR3_0_SEL, 0x00000002},
 522                 {AUD_IIR2_0_SEL, 0x00000021},
 523                 {AUD_IIR2_0_SHIFT, 0x00000002},
 524                 {AUD_DEEMPH0_SRC_SEL, 0x0000000b},
 525                 {AUD_DEEMPH1_SRC_SEL, 0x0000000b},
 526                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 527                 {AUD_START_TIMER, 0x00000000},
 528                 { /* end of list */ },
 529         };
 530
 531         static const struct rlist am_l[] = {
 532                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 533                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 534                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 535                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 536                 {AUD_PDF_DDS_CNST_BYTE2, 0x48},
 537                 {AUD_PDF_DDS_CNST_BYTE1, 0x3D},
 538                 {AUD_QAM_MODE, 0x00},
 539                 {AUD_PDF_DDS_CNST_BYTE0, 0xf5},
 540                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 541                 {AUD_PHACC_FREQ_8LSB, 0x4a},
 542                 {AUD_DEEMPHGAIN_R, 0x00006680},
 543                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 544                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 545                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 546                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 547                 {AUD_FM_MODE_ENABLE, 0x00000007},
 548                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 549                 {AUD_AFE_12DB_EN, 0x00000001},
 550                 {AAGC_GAIN, 0x00000000},
 551                 {AAGC_HYST, 0x00000018},
 552                 {AAGC_DEF, 0x00000020},
 553                 {AUD_DN0_FREQ, 0x00000000},
 554                 {AUD_POLY0_DDS_CONSTANT, 0x000E4DB2},
 555                 {AUD_DCOC_0_SRC, 0x00000021},
 556                 {AUD_IIR1_0_SEL, 0x00000000},
 557                 {AUD_IIR1_0_SHIFT, 0x00000007},
 558                 {AUD_IIR1_1_SEL, 0x00000002},
 559                 {AUD_IIR1_1_SHIFT, 0x00000000},
 560                 {AUD_DCOC_1_SRC, 0x00000003},
 561                 {AUD_DCOC1_SHIFT, 0x00000000},
 562                 {AUD_DCOC_PASS_IN, 0x00000000},
 563                 {AUD_IIR1_2_SEL, 0x00000023},
 564                 {AUD_IIR1_2_SHIFT, 0x00000000},
 565                 {AUD_IIR1_3_SEL, 0x00000004},
 566                 {AUD_IIR1_3_SHIFT, 0x00000007},
 567                 {AUD_IIR1_4_SEL, 0x00000005},
 568                 {AUD_IIR1_4_SHIFT, 0x00000007},
 569                 {AUD_IIR3_0_SEL, 0x00000007},
 570                 {AUD_IIR3_0_SHIFT, 0x00000000},
 571                 {AUD_DEEMPH0_SRC_SEL, 0x00000011},
 572                 {AUD_DEEMPH0_SHIFT, 0x00000000},
 573                 {AUD_DEEMPH0_G0, 0x00007000},
 574                 {AUD_DEEMPH0_A0, 0x00000000},
 575                 {AUD_DEEMPH0_B0, 0x00000000},
 576                 {AUD_DEEMPH0_A1, 0x00000000},
 577                 {AUD_DEEMPH0_B1, 0x00000000},
 578                 {AUD_DEEMPH1_SRC_SEL, 0x00000011},
 579                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 580                 {AUD_DEEMPH1_G0, 0x00007000},
 581                 {AUD_DEEMPH1_A0, 0x00000000},
 582                 {AUD_DEEMPH1_B0, 0x00000000},
 583                 {AUD_DEEMPH1_A1, 0x00000000},
 584                 {AUD_DEEMPH1_B1, 0x00000000},
 585                 {AUD_OUT0_SEL, 0x0000003F},
 586                 {AUD_OUT1_SEL, 0x0000003F},
 587                 {AUD_DMD_RA_DDS, 0x00F5C285},
 588                 {AUD_PLL_INT, 0x0000001E},
 589                 {AUD_PLL_DDS, 0x00000000},
 590                 {AUD_PLL_FRAC, 0x0000E542},
 591                 {AUD_RATE_ADJ1, 0x00000100},
 592                 {AUD_RATE_ADJ2, 0x00000200},
 593                 {AUD_RATE_ADJ3, 0x00000300},
 594                 {AUD_RATE_ADJ4, 0x00000400},
 595                 {AUD_RATE_ADJ5, 0x00000500},
 596                 {AUD_RATE_THRES_DMD, 0x000000C0},
 597                 { /* end of list */ },
 598         };
 599
 600         static const struct rlist a2_deemph50[] = {
 601                 {AUD_DEEMPH0_G0, 0x00000380},
 602                 {AUD_DEEMPH1_G0, 0x00000380},
 603                 {AUD_DEEMPHGAIN_R, 0x000011e1},
 604                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 605                 {AUD_DEEMPHNUMER2_R, 0x0003023c},
 606                 { /* end of list */ },
 607         };
 608
 609         set_audio_start(core, SEL_A2);
 610         switch (core->tvaudio) {
 611         case WW_BG:
 612                 dprintk("%s PAL-BG A1/2 (status: known-good)\n", __func__);
 613                 set_audio_registers(core, a2_bgdk_common);
 614                 set_audio_registers(core, a2_bg);
 615                 set_audio_registers(core, a2_deemph50);
 616                 break;
 617         case WW_DK:
 618                 dprintk("%s PAL-DK A1/2 (status: known-good)\n", __func__);
 619                 set_audio_registers(core, a2_bgdk_common);
 620                 set_audio_registers(core, a2_dk);
 621                 set_audio_registers(core, a2_deemph50);
 622                 break;
 623         case WW_I:
 624                 dprintk("%s PAL-I A1 (status: known-good)\n", __func__);
 625                 set_audio_registers(core, a1_i);
 626                 set_audio_registers(core, a2_deemph50);
 627                 break;
 628         case WW_L:
 629                 dprintk("%s AM-L (status: devel)\n", __func__);
 630                 set_audio_registers(core, am_l);
 631                 break;
 632         case WW_NONE:
 633         case WW_BTSC:
 634         case WW_EIAJ:
 635         case WW_I2SPT:
 636         case WW_FM:
 637         case WW_I2SADC:
 638         case WW_M:
 639                 dprintk("%s Warning: wrong value\n", __func__);
 640                 return;
 641                 break;
 642         };
 643
 644         mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
 645         set_audio_finish(core, mode);
 646 }
 647
 648 static void set_audio_standard_EIAJ(struct cx88_core *core)
 649 {
 650         static const struct rlist eiaj[] = {
 651                 /* TODO: eiaj register settings are not there yet ... */
 652
 653                 { /* end of list */ },
 654         };
 655         dprintk("%s (status: unknown)\n", __func__);
 656
 657         set_audio_start(core, SEL_EIAJ);
 658         set_audio_registers(core, eiaj);
 659         set_audio_finish(core, EN_EIAJ_AUTO_STEREO);
 660 }
 661
 662 static void set_audio_standard_FM(struct cx88_core *core,
 663                                   enum cx88_deemph_type deemph)
 664 {
 665         static const struct rlist fm_deemph_50[] = {
 666                 {AUD_DEEMPH0_G0, 0x0C45},
 667                 {AUD_DEEMPH0_A0, 0x6262},
 668                 {AUD_DEEMPH0_B0, 0x1C29},
 669                 {AUD_DEEMPH0_A1, 0x3FC66},
 670                 {AUD_DEEMPH0_B1, 0x399A},
 671
 672                 {AUD_DEEMPH1_G0, 0x0D80},
 673                 {AUD_DEEMPH1_A0, 0x6262},
 674                 {AUD_DEEMPH1_B0, 0x1C29},
 675                 {AUD_DEEMPH1_A1, 0x3FC66},
 676                 {AUD_DEEMPH1_B1, 0x399A},
 677
 678                 {AUD_POLYPH80SCALEFAC, 0x0003},
 679                 { /* end of list */ },
 680         };
 681         static const struct rlist fm_deemph_75[] = {
 682                 {AUD_DEEMPH0_G0, 0x091B},
 683                 {AUD_DEEMPH0_A0, 0x6B68},
 684                 {AUD_DEEMPH0_B0, 0x11EC},
 685                 {AUD_DEEMPH0_A1, 0x3FC66},
 686                 {AUD_DEEMPH0_B1, 0x399A},
 687
 688                 {AUD_DEEMPH1_G0, 0x0AA0},
 689                 {AUD_DEEMPH1_A0, 0x6B68},
 690                 {AUD_DEEMPH1_B0, 0x11EC},
 691                 {AUD_DEEMPH1_A1, 0x3FC66},
 692                 {AUD_DEEMPH1_B1, 0x399A},
 693
 694                 {AUD_POLYPH80SCALEFAC, 0x0003},
 695                 { /* end of list */ },
 696         };
 697
 698         /* It is enough to leave default values? */
 699         /* No, it's not!  The deemphasis registers are reset to the 75us
 700          * values by default.  Analyzing the spectrum of the decoded audio
 701          * reveals that "no deemphasis" is the same as 75 us, while the 50 us
 702          * setting results in less deemphasis.  */
 703         static const struct rlist fm_no_deemph[] = {
 704
 705                 {AUD_POLYPH80SCALEFAC, 0x0003},
 706                 { /* end of list */ },
 707         };
 708
 709         dprintk("%s (status: unknown)\n", __func__);
 710         set_audio_start(core, SEL_FMRADIO);
 711
 712         switch (deemph) {
 713         default:
 714         case FM_NO_DEEMPH:
 715                 set_audio_registers(core, fm_no_deemph);
 716                 break;
 717
 718         case FM_DEEMPH_50:
 719                 set_audio_registers(core, fm_deemph_50);
 720                 break;
 721
 722         case FM_DEEMPH_75:
 723                 set_audio_registers(core, fm_deemph_75);
 724                 break;
 725         }
 726
 727         set_audio_finish(core, EN_FMRADIO_AUTO_STEREO);
 728 }
 729
 730 /* ----------------------------------------------------------- */
 731
 732 static int cx88_detect_nicam(struct cx88_core *core)
 733 {
 734         int i, j = 0;
 735
 736         dprintk("start nicam autodetect.\n");
 737
 738         for (i = 0; i < 6; i++) {
 739                 /* if bit1=1 then nicam is detected */
 740                 j += ((cx_read(AUD_NICAM_STATUS2) & 0x02) >> 1);
 741
 742                 if (j == 1) {
 743                         dprintk("nicam is detected.\n");
 744                         return 1;
 745                 }
 746
 747                 /* wait a little bit for next reading status */
 748                 msleep(10);
 749         }
 750
 751         dprintk("nicam is not detected.\n");
 752         return 0;
 753 }
 754
 755 void cx88_set_tvaudio(struct cx88_core *core)
 756 {
 757         switch (core->tvaudio) {
 758         case WW_BTSC:
 759                 set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 760                 break;
 761         case WW_BG:
 762         case WW_DK:
 763         case WW_M:
 764         case WW_I:
 765         case WW_L:
 766                 /* prepare all dsp registers */
 767                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 768
 769                 /* set nicam mode - otherwise
 770                    AUD_NICAM_STATUS2 contains wrong values */
 771                 set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
 772                 if (0 == cx88_detect_nicam(core)) {
 773                         /* fall back to fm / am mono */
 774                         set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 775                         core->audiomode_current = V4L2_TUNER_MODE_MONO;
 776                         core->use_nicam = 0;
 777                 } else {
 778                         core->use_nicam = 1;
 779                 }
 780                 break;
 781         case WW_EIAJ:
 782                 set_audio_standard_EIAJ(core);
 783                 break;
 784         case WW_FM:
 785                 set_audio_standard_FM(core, radio_deemphasis);
 786                 break;
 787         case WW_I2SADC:
 788                 set_audio_start(core, 0x01);
 789                 /* Slave/Philips/Autobaud */
 790                 cx_write(AUD_I2SINPUTCNTL, 0);
 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                 printk("%s/0: unknown tv audio mode [%d]\n",
 798                        core->name, core->tvaudio);
 799                 break;
 800         }
 801         return;
 802 }
 803
 804 void cx88_newstation(struct cx88_core *core)
 805 {
 806         core->audiomode_manual = UNSET;
 807         core->last_change = jiffies;
 808 }
 809
 810 void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
 811 {
 812         static const char * const m[] = { "stereo", "dual mono", "mono", "sap" };
 813         static const char * const p[] = { "no pilot", "pilot c1", "pilot c2", "?" };
 814         u32 reg, mode, pilot;
 815
 816         reg = cx_read(AUD_STATUS);
 817         mode = reg & 0x03;
 818         pilot = (reg >> 2) & 0x03;
 819
 820         if (core->astat != reg)
 821                 dprintk("AUD_STATUS: 0x%x [%s/%s] ctl=%s\n",
 822                         reg, m[mode], p[pilot],
 823                         aud_ctl_names[cx_read(AUD_CTL) & 63]);
 824         core->astat = reg;
 825
 826         t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP |
 827             V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
 828         t->rxsubchans = UNSET;
 829         t->audmode = V4L2_TUNER_MODE_MONO;
 830
 831         switch (mode) {
 832         case 0:
 833                 t->audmode = V4L2_TUNER_MODE_STEREO;
 834                 break;
 835         case 1:
 836                 t->audmode = V4L2_TUNER_MODE_LANG2;
 837                 break;
 838         case 2:
 839                 t->audmode = V4L2_TUNER_MODE_MONO;
 840                 break;
 841         case 3:
 842                 t->audmode = V4L2_TUNER_MODE_SAP;
 843                 break;
 844         }
 845
 846         switch (core->tvaudio) {
 847         case WW_BTSC:
 848         case WW_BG:
 849         case WW_DK:
 850         case WW_M:
 851         case WW_EIAJ:
 852                 if (!core->use_nicam) {
 853                         t->rxsubchans = cx88_dsp_detect_stereo_sap(core);
 854                         break;
 855                 }
 856                 break;
 857         case WW_NONE:
 858         case WW_I:
 859         case WW_L:
 860         case WW_I2SPT:
 861         case WW_FM:
 862         case WW_I2SADC:
 863                 /* nothing */
 864                 break;
 865         }
 866
 867         /* If software stereo detection is not supported... */
 868         if (UNSET == t->rxsubchans) {
 869                 t->rxsubchans = V4L2_TUNER_SUB_MONO;
 870                 /* If the hardware itself detected stereo, also return
 871                    stereo as an available subchannel */
 872                 if (V4L2_TUNER_MODE_STEREO == t->audmode)
 873                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 874         }
 875         return;
 876 }
 877
 878 void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
 879 {
 880         u32 ctl = UNSET;
 881         u32 mask = UNSET;
 882
 883         if (manual) {
 884                 core->audiomode_manual = mode;
 885         } else {
 886                 if (UNSET != core->audiomode_manual)
 887                         return;
 888         }
 889         core->audiomode_current = mode;
 890
 891         switch (core->tvaudio) {
 892         case WW_BTSC:
 893                 switch (mode) {
 894                 case V4L2_TUNER_MODE_MONO:
 895                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_MONO);
 896                         break;
 897                 case V4L2_TUNER_MODE_LANG1:
 898                         set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 899                         break;
 900                 case V4L2_TUNER_MODE_LANG2:
 901                         set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
 902                         break;
 903                 case V4L2_TUNER_MODE_STEREO:
 904                 case V4L2_TUNER_MODE_LANG1_LANG2:
 905                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
 906                         break;
 907                 }
 908                 break;
 909         case WW_BG:
 910         case WW_DK:
 911         case WW_M:
 912         case WW_I:
 913         case WW_L:
 914                 if (1 == core->use_nicam) {
 915                         switch (mode) {
 916                         case V4L2_TUNER_MODE_MONO:
 917                         case V4L2_TUNER_MODE_LANG1:
 918                                 set_audio_standard_NICAM(core,
 919                                                          EN_NICAM_FORCE_MONO1);
 920                                 break;
 921                         case V4L2_TUNER_MODE_LANG2:
 922                                 set_audio_standard_NICAM(core,
 923                                                          EN_NICAM_FORCE_MONO2);
 924                                 break;
 925                         case V4L2_TUNER_MODE_STEREO:
 926                         case V4L2_TUNER_MODE_LANG1_LANG2:
 927                                 set_audio_standard_NICAM(core,
 928                                                          EN_NICAM_FORCE_STEREO);
 929                                 break;
 930                         }
 931                 } else {
 932                         if ((core->tvaudio == WW_I) || (core->tvaudio == WW_L)) {
 933                                 /* fall back to fm / am mono */
 934                                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 935                         } else {
 936                                 /* TODO: Add A2 autodection */
 937                                 mask = 0x3f;
 938                                 switch (mode) {
 939                                 case V4L2_TUNER_MODE_MONO:
 940                                 case V4L2_TUNER_MODE_LANG1:
 941                                         ctl = EN_A2_FORCE_MONO1;
 942                                         break;
 943                                 case V4L2_TUNER_MODE_LANG2:
 944                                         ctl = EN_A2_FORCE_MONO2;
 945                                         break;
 946                                 case V4L2_TUNER_MODE_STEREO:
 947                                 case V4L2_TUNER_MODE_LANG1_LANG2:
 948                                         ctl = EN_A2_FORCE_STEREO;
 949                                         break;
 950                                 }
 951                         }
 952                 }
 953                 break;
 954         case WW_FM:
 955                 switch (mode) {
 956                 case V4L2_TUNER_MODE_MONO:
 957                         ctl = EN_FMRADIO_FORCE_MONO;
 958                         mask = 0x3f;
 959                         break;
 960                 case V4L2_TUNER_MODE_STEREO:
 961                         ctl = EN_FMRADIO_AUTO_STEREO;
 962                         mask = 0x3f;
 963                         break;
 964                 }
 965                 break;
 966         case WW_I2SADC:
 967         case WW_NONE:
 968         case WW_EIAJ:
 969         case WW_I2SPT:
 970                 /* DO NOTHING */
 971                 break;
 972         }
 973
 974         if (UNSET != ctl) {
 975                 dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x "
 976                         "[status=0x%x,ctl=0x%x,vol=0x%x]\n",
 977                         mask, ctl, cx_read(AUD_STATUS),
 978                         cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
 979                 cx_andor(AUD_CTL, mask, ctl);
 980         }
 981         return;
 982 }
 983
 984 int cx88_audio_thread(void *data)
 985 {
 986         struct cx88_core *core = data;
 987         struct v4l2_tuner t;
 988         u32 mode = 0;
 989
 990         dprintk("cx88: tvaudio thread started\n");
 991         set_freezable();
 992         for (;;) {
 993                 msleep_interruptible(1000);
 994                 if (kthread_should_stop())
 995                         break;
 996                 try_to_freeze();
 997
 998                 switch (core->tvaudio) {
 999                 case WW_BG:
1000                 case WW_DK:
1001                 case WW_M:
1002                 case WW_I:
1003                 case WW_L:
1004                         if (core->use_nicam)
1005                                 goto hw_autodetect;
1006
1007                         /* just monitor the audio status for now ... */
1008                         memset(&t, 0, sizeof(t));
1009                         cx88_get_stereo(core, &t);
1010
1011                         if (UNSET != core->audiomode_manual)
1012                                 /* manually set, don't do anything. */
1013                                 continue;
1014
1015                         /* monitor signal and set stereo if available */
1016                         if (t.rxsubchans & V4L2_TUNER_SUB_STEREO)
1017                                 mode = V4L2_TUNER_MODE_STEREO;
1018                         else
1019                                 mode = V4L2_TUNER_MODE_MONO;
1020                         if (mode == core->audiomode_current)
1021                                 continue;
1022                         /* automatically switch to best available mode */
1023                         cx88_set_stereo(core, mode, 0);
1024                         break;
1025                 case WW_NONE:
1026                 case WW_BTSC:
1027                 case WW_EIAJ:
1028                 case WW_I2SPT:
1029                 case WW_FM:
1030                 case WW_I2SADC:
1031 hw_autodetect:
1032                         /* stereo autodetection is supported by hardware so
1033                            we don't need to do it manually. Do nothing. */
1034                         break;
1035                 }
1036         }
1037
1038         dprintk("cx88: tvaudio thread exiting\n");
1039         return 0;
1040 }
1041
1042 /* ----------------------------------------------------------- */
1043
1044 EXPORT_SYMBOL(cx88_set_tvaudio);
1045 EXPORT_SYMBOL(cx88_newstation);
1046 EXPORT_SYMBOL(cx88_set_stereo);
1047 EXPORT_SYMBOL(cx88_get_stereo);
1048 EXPORT_SYMBOL(cx88_audio_thread);
1049
1050 /*
1051  * Local variables:
1052  * c-basic-offset: 8
1053  * End:
1054  * kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
1055  */