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/moduleparam.h>
  40 #include <linux/errno.h>
  41 #include <linux/kernel.h>
  42 #include <linux/slab.h>
  43 #include <linux/mm.h>
  44 #include <linux/poll.h>
  45 #include <linux/pci.h>
  46 #include <linux/signal.h>
  47 #include <linux/ioport.h>
  48 #include <linux/sched.h>
  49 #include <linux/types.h>
  50 #include <linux/interrupt.h>
  51 #include <linux/vmalloc.h>
  52 #include <linux/init.h>
  53 #include <linux/smp_lock.h>
  54 #include <linux/delay.h>
  55 #include <linux/kthread.h>
  56
  57 #include "cx88.h"
  58
  59 static unsigned int audio_debug = 0;
  60 module_param(audio_debug, int, 0644);
  61 MODULE_PARM_DESC(audio_debug, "enable debug messages [audio]");
  62
  63 #define dprintk(fmt, arg...)    if (audio_debug) \
  64         printk(KERN_DEBUG "%s/0: " fmt, core->name , ## arg)
  65
  66 /* ----------------------------------------------------------- */
  67
  68 static char *aud_ctl_names[64] = {
  69         [EN_BTSC_FORCE_MONO] = "BTSC_FORCE_MONO",
  70         [EN_BTSC_FORCE_STEREO] = "BTSC_FORCE_STEREO",
  71         [EN_BTSC_FORCE_SAP] = "BTSC_FORCE_SAP",
  72         [EN_BTSC_AUTO_STEREO] = "BTSC_AUTO_STEREO",
  73         [EN_BTSC_AUTO_SAP] = "BTSC_AUTO_SAP",
  74         [EN_A2_FORCE_MONO1] = "A2_FORCE_MONO1",
  75         [EN_A2_FORCE_MONO2] = "A2_FORCE_MONO2",
  76         [EN_A2_FORCE_STEREO] = "A2_FORCE_STEREO",
  77         [EN_A2_AUTO_MONO2] = "A2_AUTO_MONO2",
  78         [EN_A2_AUTO_STEREO] = "A2_AUTO_STEREO",
  79         [EN_EIAJ_FORCE_MONO1] = "EIAJ_FORCE_MONO1",
  80         [EN_EIAJ_FORCE_MONO2] = "EIAJ_FORCE_MONO2",
  81         [EN_EIAJ_FORCE_STEREO] = "EIAJ_FORCE_STEREO",
  82         [EN_EIAJ_AUTO_MONO2] = "EIAJ_AUTO_MONO2",
  83         [EN_EIAJ_AUTO_STEREO] = "EIAJ_AUTO_STEREO",
  84         [EN_NICAM_FORCE_MONO1] = "NICAM_FORCE_MONO1",
  85         [EN_NICAM_FORCE_MONO2] = "NICAM_FORCE_MONO2",
  86         [EN_NICAM_FORCE_STEREO] = "NICAM_FORCE_STEREO",
  87         [EN_NICAM_AUTO_MONO2] = "NICAM_AUTO_MONO2",
  88         [EN_NICAM_AUTO_STEREO] = "NICAM_AUTO_STEREO",
  89         [EN_FMRADIO_FORCE_MONO] = "FMRADIO_FORCE_MONO",
  90         [EN_FMRADIO_FORCE_STEREO] = "FMRADIO_FORCE_STEREO",
  91         [EN_FMRADIO_AUTO_STEREO] = "FMRADIO_AUTO_STEREO",
  92 };
  93
  94 struct rlist {
  95         u32 reg;
  96         u32 val;
  97 };
  98
  99 static void set_audio_registers(struct cx88_core *core, const struct rlist *l)
 100 {
 101         int i;
 102
 103         for (i = 0; l[i].reg; i++) {
 104                 switch (l[i].reg) {
 105                 case AUD_PDF_DDS_CNST_BYTE2:
 106                 case AUD_PDF_DDS_CNST_BYTE1:
 107                 case AUD_PDF_DDS_CNST_BYTE0:
 108                 case AUD_QAM_MODE:
 109                 case AUD_PHACC_FREQ_8MSB:
 110                 case AUD_PHACC_FREQ_8LSB:
 111                         cx_writeb(l[i].reg, l[i].val);
 112                         break;
 113                 default:
 114                         cx_write(l[i].reg, l[i].val);
 115                         break;
 116                 }
 117         }
 118 }
 119
 120 static void set_audio_start(struct cx88_core *core, u32 mode)
 121 {
 122         /* mute */
 123         cx_write(AUD_VOL_CTL, (1 << 6));
 124
 125         /* start programming */
 126         cx_write(AUD_INIT, mode);
 127         cx_write(AUD_INIT_LD, 0x0001);
 128         cx_write(AUD_SOFT_RESET, 0x0001);
 129 }
 130
 131 static void set_audio_finish(struct cx88_core *core, u32 ctl)
 132 {
 133         u32 volume;
 134
 135         /* restart dma; This avoids buzz in NICAM and is good in others  */
 136         cx88_stop_audio_dma(core);
 137         cx_write(AUD_RATE_THRES_DMD, 0x000000C0);
 138         cx88_start_audio_dma(core);
 139
 140         if (cx88_boards[core->board].blackbird) {
 141                 /* sets sound input from external adc */
 142                 cx_set(AUD_CTL, EN_I2SIN_ENABLE);
 143                 cx_write(AUD_I2SINPUTCNTL, 4);
 144                 cx_write(AUD_BAUDRATE, 1);
 145                 /* 'pass-thru mode': this enables the i2s output to the mpeg encoder */
 146                 cx_set(AUD_CTL, EN_I2SOUT_ENABLE);
 147                 cx_write(AUD_I2SOUTPUTCNTL, 1);
 148                 cx_write(AUD_I2SCNTL, 0);
 149                 /* cx_write(AUD_APB_IN_RATE_ADJ, 0); */
 150         } else {
 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
 163 /* ----------------------------------------------------------- */
 164
 165 static void set_audio_standard_BTSC(struct cx88_core *core, unsigned int sap,
 166                                     u32 mode)
 167 {
 168         static const struct rlist btsc[] = {
 169                 {AUD_AFE_12DB_EN, 0x00000001},
 170                 {AUD_OUT1_SEL, 0x00000013},
 171                 {AUD_OUT1_SHIFT, 0x00000000},
 172                 {AUD_POLY0_DDS_CONSTANT, 0x0012010c},
 173                 {AUD_DMD_RA_DDS, 0x00c3e7aa},
 174                 {AUD_DBX_IN_GAIN, 0x00004734},
 175                 {AUD_DBX_WBE_GAIN, 0x00004640},
 176                 {AUD_DBX_SE_GAIN, 0x00008d31},
 177                 {AUD_DCOC_0_SRC, 0x0000001a},
 178                 {AUD_IIR1_4_SEL, 0x00000021},
 179                 {AUD_DCOC_PASS_IN, 0x00000003},
 180                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 181                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 182                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 183                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 184                 {AUD_DN0_FREQ, 0x0000283b},
 185                 {AUD_DN2_SRC_SEL, 0x00000008},
 186                 {AUD_DN2_FREQ, 0x00003000},
 187                 {AUD_DN2_AFC, 0x00000002},
 188                 {AUD_DN2_SHFT, 0x00000000},
 189                 {AUD_IIR2_2_SEL, 0x00000020},
 190                 {AUD_IIR2_2_SHIFT, 0x00000000},
 191                 {AUD_IIR2_3_SEL, 0x0000001f},
 192                 {AUD_IIR2_3_SHIFT, 0x00000000},
 193                 {AUD_CRDC1_SRC_SEL, 0x000003ce},
 194                 {AUD_CRDC1_SHIFT, 0x00000000},
 195                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 196                 {AUD_DCOC_1_SRC, 0x0000001b},
 197                 {AUD_DCOC1_SHIFT, 0x00000000},
 198                 {AUD_RDSI_SEL, 0x00000008},
 199                 {AUD_RDSQ_SEL, 0x00000008},
 200                 {AUD_RDSI_SHIFT, 0x00000000},
 201                 {AUD_RDSQ_SHIFT, 0x00000000},
 202                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 203                 { /* end of list */ },
 204         };
 205         static const struct rlist btsc_sap[] = {
 206                 {AUD_AFE_12DB_EN, 0x00000001},
 207                 {AUD_DBX_IN_GAIN, 0x00007200},
 208                 {AUD_DBX_WBE_GAIN, 0x00006200},
 209                 {AUD_DBX_SE_GAIN, 0x00006200},
 210                 {AUD_IIR1_1_SEL, 0x00000000},
 211                 {AUD_IIR1_3_SEL, 0x00000001},
 212                 {AUD_DN1_SRC_SEL, 0x00000007},
 213                 {AUD_IIR1_4_SHIFT, 0x00000006},
 214                 {AUD_IIR2_1_SHIFT, 0x00000000},
 215                 {AUD_IIR2_2_SHIFT, 0x00000000},
 216                 {AUD_IIR3_0_SHIFT, 0x00000000},
 217                 {AUD_IIR3_1_SHIFT, 0x00000000},
 218                 {AUD_IIR3_0_SEL, 0x0000000d},
 219                 {AUD_IIR3_1_SEL, 0x0000000e},
 220                 {AUD_DEEMPH1_SRC_SEL, 0x00000014},
 221                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 222                 {AUD_DEEMPH1_G0, 0x00004000},
 223                 {AUD_DEEMPH1_A0, 0x00000000},
 224                 {AUD_DEEMPH1_B0, 0x00000000},
 225                 {AUD_DEEMPH1_A1, 0x00000000},
 226                 {AUD_DEEMPH1_B1, 0x00000000},
 227                 {AUD_OUT0_SEL, 0x0000003f},
 228                 {AUD_OUT1_SEL, 0x0000003f},
 229                 {AUD_DN1_AFC, 0x00000002},
 230                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 231                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 232                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 233                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 234                 {AUD_IIR1_0_SEL, 0x0000001d},
 235                 {AUD_IIR1_2_SEL, 0x0000001e},
 236                 {AUD_IIR2_1_SEL, 0x00000002},
 237                 {AUD_IIR2_2_SEL, 0x00000004},
 238                 {AUD_IIR3_2_SEL, 0x0000000f},
 239                 {AUD_DCOC2_SHIFT, 0x00000001},
 240                 {AUD_IIR3_2_SHIFT, 0x00000001},
 241                 {AUD_DEEMPH0_SRC_SEL, 0x00000014},
 242                 {AUD_CORDIC_SHIFT_1, 0x00000006},
 243                 {AUD_POLY0_DDS_CONSTANT, 0x000e4db2},
 244                 {AUD_DMD_RA_DDS, 0x00f696e6},
 245                 {AUD_IIR2_3_SEL, 0x00000025},
 246                 {AUD_IIR1_4_SEL, 0x00000021},
 247                 {AUD_DN1_FREQ, 0x0000c965},
 248                 {AUD_DCOC_PASS_IN, 0x00000003},
 249                 {AUD_DCOC_0_SRC, 0x0000001a},
 250                 {AUD_DCOC_1_SRC, 0x0000001b},
 251                 {AUD_DCOC1_SHIFT, 0x00000000},
 252                 {AUD_RDSI_SEL, 0x00000009},
 253                 {AUD_RDSQ_SEL, 0x00000009},
 254                 {AUD_RDSI_SHIFT, 0x00000000},
 255                 {AUD_RDSQ_SHIFT, 0x00000000},
 256                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 257                 { /* end of list */ },
 258         };
 259
 260         mode |= EN_FMRADIO_EN_RDS;
 261
 262         if (sap) {
 263                 dprintk("%s SAP (status: unknown)\n", __FUNCTION__);
 264                 set_audio_start(core, SEL_SAP);
 265                 set_audio_registers(core, btsc_sap);
 266                 set_audio_finish(core, mode);
 267         } else {
 268                 dprintk("%s (status: known-good)\n", __FUNCTION__);
 269                 set_audio_start(core, SEL_BTSC);
 270                 set_audio_registers(core, btsc);
 271                 set_audio_finish(core, mode);
 272         }
 273 }
 274
 275 static void set_audio_standard_NICAM(struct cx88_core *core, u32 mode)
 276 {
 277         static const struct rlist nicam_l[] = {
 278                 {AUD_AFE_12DB_EN, 0x00000001},
 279                 {AUD_RATE_ADJ1, 0x00000060},
 280                 {AUD_RATE_ADJ2, 0x000000F9},
 281                 {AUD_RATE_ADJ3, 0x000001CC},
 282                 {AUD_RATE_ADJ4, 0x000002B3},
 283                 {AUD_RATE_ADJ5, 0x00000726},
 284                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 285                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 286                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 287                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 288                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 289                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 290                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 291                 {AUD_DMD_RA_DDS, 0x00C00000},
 292                 {AUD_PLL_INT, 0x0000001E},
 293                 {AUD_PLL_DDS, 0x00000000},
 294                 {AUD_PLL_FRAC, 0x0000E542},
 295                 {AUD_START_TIMER, 0x00000000},
 296                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 297                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 298                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 299                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 300                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 301                 {AUD_QAM_MODE, 0x05},
 302                 {AUD_PHACC_FREQ_8MSB, 0x34},
 303                 {AUD_PHACC_FREQ_8LSB, 0x4C},
 304                 {AUD_DEEMPHGAIN_R, 0x00006680},
 305                 {AUD_RATE_THRES_DMD, 0x000000C0},
 306                 { /* end of list */ },
 307         };
 308
 309         static const struct rlist nicam_bgdki_common[] = {
 310                 {AUD_AFE_12DB_EN, 0x00000001},
 311                 {AUD_RATE_ADJ1, 0x00000010},
 312                 {AUD_RATE_ADJ2, 0x00000040},
 313                 {AUD_RATE_ADJ3, 0x00000100},
 314                 {AUD_RATE_ADJ4, 0x00000400},
 315                 {AUD_RATE_ADJ5, 0x00001000},
 316                 {AUD_ERRLOGPERIOD_R, 0x00000fff},
 317                 {AUD_ERRINTRPTTHSHLD1_R, 0x000003ff},
 318                 {AUD_ERRINTRPTTHSHLD2_R, 0x000000ff},
 319                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000003f},
 320                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 321                 {AUD_DEEMPHGAIN_R, 0x000023c2},
 322                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 323                 {AUD_DEEMPHNUMER2_R, 0x0003023e},
 324                 {AUD_DEEMPHDENOM1_R, 0x0000f3d0},
 325                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 326                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 327                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 328                 {AUD_QAM_MODE, 0x05},
 329                 { /* end of list */ },
 330         };
 331
 332         static const struct rlist nicam_i[] = {
 333                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 334                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 335                 {AUD_PHACC_FREQ_8LSB, 0x93},
 336                 { /* end of list */ },
 337         };
 338
 339         static const struct rlist nicam_default[] = {
 340                 {AUD_PDF_DDS_CNST_BYTE0, 0x16},
 341                 {AUD_PHACC_FREQ_8MSB, 0x34},
 342                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 343                 { /* end of list */ },
 344         };
 345
 346         set_audio_start(core,SEL_NICAM);
 347         switch (core->tvaudio) {
 348         case WW_L:
 349                 dprintk("%s SECAM-L NICAM (status: devel)\n", __FUNCTION__);
 350                 set_audio_registers(core, nicam_l);
 351                 break;
 352         case WW_I:
 353                 dprintk("%s PAL-I NICAM (status: known-good)\n", __FUNCTION__);
 354                 set_audio_registers(core, nicam_bgdki_common);
 355                 set_audio_registers(core, nicam_i);
 356                 break;
 357         default:
 358                 dprintk("%s PAL-BGDK NICAM (status: known-good)\n", __FUNCTION__);
 359                 set_audio_registers(core, nicam_bgdki_common);
 360                 set_audio_registers(core, nicam_default);
 361                 break;
 362         };
 363
 364         mode |= EN_DMTRX_LR | EN_DMTRX_BYPASS;
 365         set_audio_finish(core, mode);
 366 }
 367
 368 static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
 369 {
 370         static const struct rlist a2_bgdk_common[] = {
 371                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 372                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 373                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 374                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 375                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 376                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 377                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 378                 {AUD_QAM_MODE, 0x05},
 379                 {AUD_PHACC_FREQ_8MSB, 0x34},
 380                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 381                 {AUD_RATE_ADJ1, 0x00000100},
 382                 {AUD_RATE_ADJ2, 0x00000200},
 383                 {AUD_RATE_ADJ3, 0x00000300},
 384                 {AUD_RATE_ADJ4, 0x00000400},
 385                 {AUD_RATE_ADJ5, 0x00000500},
 386                 {AUD_THR_FR, 0x00000000},
 387                 {AAGC_HYST, 0x0000001a},
 388                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 389                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 390                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 391                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 392                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 393                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 394                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 395                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 396                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 397                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 398                 {AUD_MODE_CHG_TIMER, 0x00000040},
 399                 {AUD_AFE_12DB_EN, 0x00000001},
 400                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 401                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 402                 {AUD_DEEMPH0_G0, 0x00000380},
 403                 {AUD_DEEMPH1_G0, 0x00000380},
 404                 {AUD_DCOC_0_SRC, 0x0000001a},
 405                 {AUD_DCOC0_SHIFT, 0x00000000},
 406                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 407                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 408                 {AUD_DCOC_PASS_IN, 0x00000003},
 409                 {AUD_IIR3_0_SEL, 0x00000021},
 410                 {AUD_DN2_AFC, 0x00000002},
 411                 {AUD_DCOC_1_SRC, 0x0000001b},
 412                 {AUD_DCOC1_SHIFT, 0x00000000},
 413                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 414                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 415                 {AUD_IIR3_1_SEL, 0x00000023},
 416                 {AUD_RDSI_SEL, 0x00000017},
 417                 {AUD_RDSI_SHIFT, 0x00000000},
 418                 {AUD_RDSQ_SEL, 0x00000017},
 419                 {AUD_RDSQ_SHIFT, 0x00000000},
 420                 {AUD_PLL_INT, 0x0000001e},
 421                 {AUD_PLL_DDS, 0x00000000},
 422                 {AUD_PLL_FRAC, 0x0000e542},
 423                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 424                 {AUD_START_TIMER, 0x00000000},
 425                 { /* end of list */ },
 426         };
 427
 428         static const struct rlist a2_bg[] = {
 429                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 430                 {AUD_C1_UP_THR, 0x00007000},
 431                 {AUD_C1_LO_THR, 0x00005400},
 432                 {AUD_C2_UP_THR, 0x00005400},
 433                 {AUD_C2_LO_THR, 0x00003000},
 434                 { /* end of list */ },
 435         };
 436
 437         static const struct rlist a2_dk[] = {
 438                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 439                 {AUD_C1_UP_THR, 0x00007000},
 440                 {AUD_C1_LO_THR, 0x00005400},
 441                 {AUD_C2_UP_THR, 0x00005400},
 442                 {AUD_C2_LO_THR, 0x00003000},
 443                 {AUD_DN0_FREQ, 0x00003a1c},
 444                 {AUD_DN2_FREQ, 0x0000d2e0},
 445                 { /* end of list */ },
 446         };
 447
 448         static const struct rlist a1_i[] = {
 449                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 450                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 451                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 452                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 453                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 454                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 455                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 456                 {AUD_QAM_MODE, 0x05},
 457                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 458                 {AUD_PHACC_FREQ_8LSB, 0x93},
 459                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 460                 {AUD_PLL_INT, 0x0000001e},
 461                 {AUD_PLL_DDS, 0x00000004},
 462                 {AUD_PLL_FRAC, 0x0000e542},
 463                 {AUD_RATE_ADJ1, 0x00000100},
 464                 {AUD_RATE_ADJ2, 0x00000200},
 465                 {AUD_RATE_ADJ3, 0x00000300},
 466                 {AUD_RATE_ADJ4, 0x00000400},
 467                 {AUD_RATE_ADJ5, 0x00000500},
 468                 {AUD_THR_FR, 0x00000000},
 469                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 470                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 471                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 472                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 473                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 474                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 475                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 476                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 477                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 478                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 479                 {AUD_MODE_CHG_TIMER, 0x00000060},
 480                 {AUD_AFE_12DB_EN, 0x00000001},
 481                 {AAGC_HYST, 0x0000000a},
 482                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 483                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 484                 {AUD_C1_UP_THR, 0x00007000},
 485                 {AUD_C1_LO_THR, 0x00005400},
 486                 {AUD_C2_UP_THR, 0x00005400},
 487                 {AUD_C2_LO_THR, 0x00003000},
 488                 {AUD_DCOC_0_SRC, 0x0000001a},
 489                 {AUD_DCOC0_SHIFT, 0x00000000},
 490                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 491                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 492                 {AUD_DCOC_PASS_IN, 0x00000003},
 493                 {AUD_IIR3_0_SEL, 0x00000021},
 494                 {AUD_DN2_AFC, 0x00000002},
 495                 {AUD_DCOC_1_SRC, 0x0000001b},
 496                 {AUD_DCOC1_SHIFT, 0x00000000},
 497                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 498                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 499                 {AUD_IIR3_1_SEL, 0x00000023},
 500                 {AUD_DN0_FREQ, 0x000035a3},
 501                 {AUD_DN2_FREQ, 0x000029c7},
 502                 {AUD_CRDC0_SRC_SEL, 0x00000511},
 503                 {AUD_IIR1_0_SEL, 0x00000001},
 504                 {AUD_IIR1_1_SEL, 0x00000000},
 505                 {AUD_IIR3_2_SEL, 0x00000003},
 506                 {AUD_IIR3_2_SHIFT, 0x00000000},
 507                 {AUD_IIR3_0_SEL, 0x00000002},
 508                 {AUD_IIR2_0_SEL, 0x00000021},
 509                 {AUD_IIR2_0_SHIFT, 0x00000002},
 510                 {AUD_DEEMPH0_SRC_SEL, 0x0000000b},
 511                 {AUD_DEEMPH1_SRC_SEL, 0x0000000b},
 512                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 513                 {AUD_START_TIMER, 0x00000000},
 514                 { /* end of list */ },
 515         };
 516
 517         static const struct rlist am_l[] = {
 518                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 519                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 520                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 521                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 522                 {AUD_PDF_DDS_CNST_BYTE2, 0x48},
 523                 {AUD_PDF_DDS_CNST_BYTE1, 0x3D},
 524                 {AUD_QAM_MODE, 0x00},
 525                 {AUD_PDF_DDS_CNST_BYTE0, 0xf5},
 526                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 527                 {AUD_PHACC_FREQ_8LSB, 0x4a},
 528                 {AUD_DEEMPHGAIN_R, 0x00006680},
 529                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 530                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 531                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 532                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 533                 {AUD_FM_MODE_ENABLE, 0x00000007},
 534                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 535                 {AUD_AFE_12DB_EN, 0x00000001},
 536                 {AAGC_GAIN, 0x00000000},
 537                 {AAGC_HYST, 0x00000018},
 538                 {AAGC_DEF, 0x00000020},
 539                 {AUD_DN0_FREQ, 0x00000000},
 540                 {AUD_POLY0_DDS_CONSTANT, 0x000E4DB2},
 541                 {AUD_DCOC_0_SRC, 0x00000021},
 542                 {AUD_IIR1_0_SEL, 0x00000000},
 543                 {AUD_IIR1_0_SHIFT, 0x00000007},
 544                 {AUD_IIR1_1_SEL, 0x00000002},
 545                 {AUD_IIR1_1_SHIFT, 0x00000000},
 546                 {AUD_DCOC_1_SRC, 0x00000003},
 547                 {AUD_DCOC1_SHIFT, 0x00000000},
 548                 {AUD_DCOC_PASS_IN, 0x00000000},
 549                 {AUD_IIR1_2_SEL, 0x00000023},
 550                 {AUD_IIR1_2_SHIFT, 0x00000000},
 551                 {AUD_IIR1_3_SEL, 0x00000004},
 552                 {AUD_IIR1_3_SHIFT, 0x00000007},
 553                 {AUD_IIR1_4_SEL, 0x00000005},
 554                 {AUD_IIR1_4_SHIFT, 0x00000007},
 555                 {AUD_IIR3_0_SEL, 0x00000007},
 556                 {AUD_IIR3_0_SHIFT, 0x00000000},
 557                 {AUD_DEEMPH0_SRC_SEL, 0x00000011},
 558                 {AUD_DEEMPH0_SHIFT, 0x00000000},
 559                 {AUD_DEEMPH0_G0, 0x00007000},
 560                 {AUD_DEEMPH0_A0, 0x00000000},
 561                 {AUD_DEEMPH0_B0, 0x00000000},
 562                 {AUD_DEEMPH0_A1, 0x00000000},
 563                 {AUD_DEEMPH0_B1, 0x00000000},
 564                 {AUD_DEEMPH1_SRC_SEL, 0x00000011},
 565                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 566                 {AUD_DEEMPH1_G0, 0x00007000},
 567                 {AUD_DEEMPH1_A0, 0x00000000},
 568                 {AUD_DEEMPH1_B0, 0x00000000},
 569                 {AUD_DEEMPH1_A1, 0x00000000},
 570                 {AUD_DEEMPH1_B1, 0x00000000},
 571                 {AUD_OUT0_SEL, 0x0000003F},
 572                 {AUD_OUT1_SEL, 0x0000003F},
 573                 {AUD_DMD_RA_DDS, 0x00F5C285},
 574                 {AUD_PLL_INT, 0x0000001E},
 575                 {AUD_PLL_DDS, 0x00000000},
 576                 {AUD_PLL_FRAC, 0x0000E542},
 577                 {AUD_RATE_ADJ1, 0x00000100},
 578                 {AUD_RATE_ADJ2, 0x00000200},
 579                 {AUD_RATE_ADJ3, 0x00000300},
 580                 {AUD_RATE_ADJ4, 0x00000400},
 581                 {AUD_RATE_ADJ5, 0x00000500},
 582                 {AUD_RATE_THRES_DMD, 0x000000C0},
 583                 { /* end of list */ },
 584         };
 585
 586         static const struct rlist a2_deemph50[] = {
 587                 {AUD_DEEMPH0_G0, 0x00000380},
 588                 {AUD_DEEMPH1_G0, 0x00000380},
 589                 {AUD_DEEMPHGAIN_R, 0x000011e1},
 590                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 591                 {AUD_DEEMPHNUMER2_R, 0x0003023c},
 592                 { /* end of list */ },
 593         };
 594
 595         set_audio_start(core, SEL_A2);
 596         switch (core->tvaudio) {
 597         case WW_BG:
 598                 dprintk("%s PAL-BG A1/2 (status: known-good)\n", __FUNCTION__);
 599                 set_audio_registers(core, a2_bgdk_common);
 600                 set_audio_registers(core, a2_bg);
 601                 set_audio_registers(core, a2_deemph50);
 602                 break;
 603         case WW_DK:
 604                 dprintk("%s PAL-DK A1/2 (status: known-good)\n", __FUNCTION__);
 605                 set_audio_registers(core, a2_bgdk_common);
 606                 set_audio_registers(core, a2_dk);
 607                 set_audio_registers(core, a2_deemph50);
 608                 break;
 609         case WW_I:
 610                 dprintk("%s PAL-I A1 (status: known-good)\n", __FUNCTION__);
 611                 set_audio_registers(core, a1_i);
 612                 set_audio_registers(core, a2_deemph50);
 613                 break;
 614         case WW_L:
 615                 dprintk("%s AM-L (status: devel)\n", __FUNCTION__);
 616                 set_audio_registers(core, am_l);
 617                 break;
 618         default:
 619                 dprintk("%s Warning: wrong value\n", __FUNCTION__);
 620                 return;
 621                 break;
 622         };
 623
 624         mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
 625         set_audio_finish(core, mode);
 626 }
 627
 628 static void set_audio_standard_EIAJ(struct cx88_core *core)
 629 {
 630         static const struct rlist eiaj[] = {
 631                 /* TODO: eiaj register settings are not there yet ... */
 632
 633                 { /* end of list */ },
 634         };
 635         dprintk("%s (status: unknown)\n", __FUNCTION__);
 636
 637         set_audio_start(core, SEL_EIAJ);
 638         set_audio_registers(core, eiaj);
 639         set_audio_finish(core, EN_EIAJ_AUTO_STEREO);
 640 }
 641
 642 static void set_audio_standard_FM(struct cx88_core *core,
 643                                   enum cx88_deemph_type deemph)
 644 {
 645         static const struct rlist fm_deemph_50[] = {
 646                 {AUD_DEEMPH0_G0, 0x0C45},
 647                 {AUD_DEEMPH0_A0, 0x6262},
 648                 {AUD_DEEMPH0_B0, 0x1C29},
 649                 {AUD_DEEMPH0_A1, 0x3FC66},
 650                 {AUD_DEEMPH0_B1, 0x399A},
 651
 652                 {AUD_DEEMPH1_G0, 0x0D80},
 653                 {AUD_DEEMPH1_A0, 0x6262},
 654                 {AUD_DEEMPH1_B0, 0x1C29},
 655                 {AUD_DEEMPH1_A1, 0x3FC66},
 656                 {AUD_DEEMPH1_B1, 0x399A},
 657
 658                 {AUD_POLYPH80SCALEFAC, 0x0003},
 659                 { /* end of list */ },
 660         };
 661         static const struct rlist fm_deemph_75[] = {
 662                 {AUD_DEEMPH0_G0, 0x091B},
 663                 {AUD_DEEMPH0_A0, 0x6B68},
 664                 {AUD_DEEMPH0_B0, 0x11EC},
 665                 {AUD_DEEMPH0_A1, 0x3FC66},
 666                 {AUD_DEEMPH0_B1, 0x399A},
 667
 668                 {AUD_DEEMPH1_G0, 0x0AA0},
 669                 {AUD_DEEMPH1_A0, 0x6B68},
 670                 {AUD_DEEMPH1_B0, 0x11EC},
 671                 {AUD_DEEMPH1_A1, 0x3FC66},
 672                 {AUD_DEEMPH1_B1, 0x399A},
 673
 674                 {AUD_POLYPH80SCALEFAC, 0x0003},
 675                 { /* end of list */ },
 676         };
 677
 678         /* It is enough to leave default values? */
 679         static const struct rlist fm_no_deemph[] = {
 680
 681                 {AUD_POLYPH80SCALEFAC, 0x0003},
 682                 { /* end of list */ },
 683         };
 684
 685         dprintk("%s (status: unknown)\n", __FUNCTION__);
 686         set_audio_start(core, SEL_FMRADIO);
 687
 688         switch (deemph) {
 689         case FM_NO_DEEMPH:
 690                 set_audio_registers(core, fm_no_deemph);
 691                 break;
 692
 693         case FM_DEEMPH_50:
 694                 set_audio_registers(core, fm_deemph_50);
 695                 break;
 696
 697         case FM_DEEMPH_75:
 698                 set_audio_registers(core, fm_deemph_75);
 699                 break;
 700         }
 701
 702         set_audio_finish(core, EN_FMRADIO_AUTO_STEREO);
 703 }
 704
 705 /* ----------------------------------------------------------- */
 706
 707 int cx88_detect_nicam(struct cx88_core *core)
 708 {
 709         int i, j = 0;
 710
 711         dprintk("start nicam autodetect.\n");
 712
 713         for (i = 0; i < 6; i++) {
 714                 /* if bit1=1 then nicam is detected */
 715                 j += ((cx_read(AUD_NICAM_STATUS2) & 0x02) >> 1);
 716
 717                 if (j == 1) {
 718                         dprintk("nicam is detected.\n");
 719                         return 1;
 720                 }
 721
 722                 /* wait a little bit for next reading status */
 723                 msleep(10);
 724         }
 725
 726         dprintk("nicam is not detected.\n");
 727         return 0;
 728 }
 729
 730 void cx88_set_tvaudio(struct cx88_core *core)
 731 {
 732         switch (core->tvaudio) {
 733         case WW_BTSC:
 734                 set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 735                 break;
 736         case WW_BG:
 737         case WW_DK:
 738         case WW_I:
 739         case WW_L:
 740                 /* prepare all dsp registers */
 741                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 742
 743                 /* set nicam mode - otherwise
 744                    AUD_NICAM_STATUS2 contains wrong values */
 745                 set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
 746                 if (0 == cx88_detect_nicam(core)) {
 747                         /* fall back to fm / am mono */
 748                         set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 749                         core->use_nicam = 0;
 750                 } else {
 751                         core->use_nicam = 1;
 752                 }
 753                 break;
 754         case WW_EIAJ:
 755                 set_audio_standard_EIAJ(core);
 756                 break;
 757         case WW_FM:
 758                 set_audio_standard_FM(core, FM_NO_DEEMPH);
 759                 break;
 760         case WW_NONE:
 761         default:
 762                 printk("%s/0: unknown tv audio mode [%d]\n",
 763                        core->name, core->tvaudio);
 764                 break;
 765         }
 766         return;
 767 }
 768
 769 void cx88_newstation(struct cx88_core *core)
 770 {
 771         core->audiomode_manual = UNSET;
 772 }
 773
 774 void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
 775 {
 776         static char *m[] = { "stereo", "dual mono", "mono", "sap" };
 777         static char *p[] = { "no pilot", "pilot c1", "pilot c2", "?" };
 778         u32 reg, mode, pilot;
 779
 780         reg = cx_read(AUD_STATUS);
 781         mode = reg & 0x03;
 782         pilot = (reg >> 2) & 0x03;
 783
 784         if (core->astat != reg)
 785                 dprintk("AUD_STATUS: 0x%x [%s/%s] ctl=%s\n",
 786                         reg, m[mode], p[pilot],
 787                         aud_ctl_names[cx_read(AUD_CTL) & 63]);
 788         core->astat = reg;
 789
 790 /* TODO
 791        Reading from AUD_STATUS is not enough
 792        for auto-detecting sap/dual-fm/nicam.
 793        Add some code here later.
 794 */
 795
 796 # if 0
 797         t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP |
 798             V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
 799         t->rxsubchans = V4L2_TUNER_SUB_MONO;
 800         t->audmode = V4L2_TUNER_MODE_MONO;
 801
 802         switch (core->tvaudio) {
 803         case WW_BTSC:
 804                 t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP;
 805                 t->rxsubchans = V4L2_TUNER_SUB_STEREO;
 806                 if (1 == pilot) {
 807                         /* SAP */
 808                         t->rxsubchans |= V4L2_TUNER_SUB_SAP;
 809                 }
 810                 break;
 811         case WW_A2_BG:
 812         case WW_A2_DK:
 813         case WW_A2_M:
 814                 if (1 == pilot) {
 815                         /* stereo */
 816                         t->rxsubchans =
 817                             V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
 818                         if (0 == mode)
 819                                 t->audmode = V4L2_TUNER_MODE_STEREO;
 820                 }
 821                 if (2 == pilot) {
 822                         /* dual language -- FIXME */
 823                         t->rxsubchans =
 824                             V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
 825                         t->audmode = V4L2_TUNER_MODE_LANG1;
 826                 }
 827                 break;
 828         case WW_NICAM_BGDKL:
 829                 if (0 == mode) {
 830                         t->audmode = V4L2_TUNER_MODE_STEREO;
 831                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 832                 }
 833                 break;
 834         case WW_SYSTEM_L_AM:
 835                 if (0x0 == mode && !(cx_read(AUD_INIT) & 0x04)) {
 836                         t->audmode = V4L2_TUNER_MODE_STEREO;
 837                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 838                 }
 839                 break;
 840         default:
 841                 /* nothing */
 842                 break;
 843         }
 844 # endif
 845         return;
 846 }
 847
 848 void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
 849 {
 850         u32 ctl = UNSET;
 851         u32 mask = UNSET;
 852
 853         if (manual) {
 854                 core->audiomode_manual = mode;
 855         } else {
 856                 if (UNSET != core->audiomode_manual)
 857                         return;
 858         }
 859         core->audiomode_current = mode;
 860
 861         switch (core->tvaudio) {
 862         case WW_BTSC:
 863                 switch (mode) {
 864                 case V4L2_TUNER_MODE_MONO:
 865                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_MONO);
 866                         break;
 867                 case V4L2_TUNER_MODE_LANG1:
 868                         set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 869                         break;
 870                 case V4L2_TUNER_MODE_LANG2:
 871                         set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
 872                         break;
 873                 case V4L2_TUNER_MODE_STEREO:
 874                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
 875                         break;
 876                 }
 877                 break;
 878         case WW_BG:
 879         case WW_DK:
 880         case WW_I:
 881         case WW_L:
 882                 if (1 == core->use_nicam) {
 883                         switch (mode) {
 884                         case V4L2_TUNER_MODE_MONO:
 885                         case V4L2_TUNER_MODE_LANG1:
 886                                 set_audio_standard_NICAM(core,
 887                                                          EN_NICAM_FORCE_MONO1);
 888                                 break;
 889                         case V4L2_TUNER_MODE_LANG2:
 890                                 set_audio_standard_NICAM(core,
 891                                                          EN_NICAM_FORCE_MONO2);
 892                                 break;
 893                         case V4L2_TUNER_MODE_STEREO:
 894                                 set_audio_standard_NICAM(core,
 895                                                          EN_NICAM_FORCE_STEREO);
 896                                 break;
 897                         }
 898                 } else {
 899                         if ((core->tvaudio == WW_I) || (core->tvaudio == WW_L)) {
 900                                 /* fall back to fm / am mono */
 901                                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 902                         } else {
 903                                 /* TODO: Add A2 autodection */
 904                                 switch (mode) {
 905                                 case V4L2_TUNER_MODE_MONO:
 906                                 case V4L2_TUNER_MODE_LANG1:
 907                                         set_audio_standard_A2(core,
 908                                                               EN_A2_FORCE_MONO1);
 909                                         break;
 910                                 case V4L2_TUNER_MODE_LANG2:
 911                                         set_audio_standard_A2(core,
 912                                                               EN_A2_FORCE_MONO2);
 913                                         break;
 914                                 case V4L2_TUNER_MODE_STEREO:
 915                                         set_audio_standard_A2(core,
 916                                                               EN_A2_FORCE_STEREO);
 917                                         break;
 918                                 }
 919                         }
 920                 }
 921                 break;
 922         case WW_FM:
 923                 switch (mode) {
 924                 case V4L2_TUNER_MODE_MONO:
 925                         ctl = EN_FMRADIO_FORCE_MONO;
 926                         mask = 0x3f;
 927                         break;
 928                 case V4L2_TUNER_MODE_STEREO:
 929                         ctl = EN_FMRADIO_AUTO_STEREO;
 930                         mask = 0x3f;
 931                         break;
 932                 }
 933                 break;
 934         }
 935
 936         if (UNSET != ctl) {
 937                 dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x "
 938                         "[status=0x%x,ctl=0x%x,vol=0x%x]\n",
 939                         mask, ctl, cx_read(AUD_STATUS),
 940                         cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
 941                 cx_andor(AUD_CTL, mask, ctl);
 942         }
 943         return;
 944 }
 945
 946 int cx88_audio_thread(void *data)
 947 {
 948         struct cx88_core *core = data;
 949         struct v4l2_tuner t;
 950         u32 mode = 0;
 951
 952         dprintk("cx88: tvaudio thread started\n");
 953         for (;;) {
 954                 msleep_interruptible(1000);
 955                 if (kthread_should_stop())
 956                         break;
 957
 958                 /* just monitor the audio status for now ... */
 959                 memset(&t, 0, sizeof(t));
 960                 cx88_get_stereo(core, &t);
 961
 962                 if (UNSET != core->audiomode_manual)
 963                         /* manually set, don't do anything. */
 964                         continue;
 965
 966                 /* monitor signal */
 967                 if (t.rxsubchans & V4L2_TUNER_SUB_STEREO)
 968                         mode = V4L2_TUNER_MODE_STEREO;
 969                 else
 970                         mode = V4L2_TUNER_MODE_MONO;
 971                 if (mode == core->audiomode_current)
 972                         continue;
 973
 974                 /* automatically switch to best available mode */
 975                 cx88_set_stereo(core, mode, 0);
 976         }
 977
 978         dprintk("cx88: tvaudio thread exiting\n");
 979         return 0;
 980 }
 981
 982 /* ----------------------------------------------------------- */
 983
 984 EXPORT_SYMBOL(cx88_set_tvaudio);
 985 EXPORT_SYMBOL(cx88_newstation);
 986 EXPORT_SYMBOL(cx88_set_stereo);
 987 EXPORT_SYMBOL(cx88_get_stereo);
 988 EXPORT_SYMBOL(cx88_audio_thread);
 989
 990 /*
 991  * Local variables:
 992  * c-basic-offset: 8
 993  * End:
 994  * 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
 995  */