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(MO_AUD_DMACNTRL, 0x0000);
 127         msleep(100);
 128         //cx_write(AUD_CTL, 0x0000);
 129         cx_write(AUD_INIT, mode);
 130         cx_write(AUD_INIT_LD, 0x0001);
 131         cx_write(AUD_SOFT_RESET, 0x0001);
 132 }
 133
 134 static void set_audio_finish(struct cx88_core *core, u32 ctl)
 135 {
 136         u32 volume;
 137
 138         if (cx88_boards[core->board].blackbird) {
 139                 // sets sound input from external adc
 140                 cx_set(AUD_CTL, EN_I2SIN_ENABLE);
 141                 //cx_write(AUD_I2SINPUTCNTL, 0);
 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         } else {
 150                 ctl |= EN_DAC_ENABLE;
 151                 cx_write(AUD_CTL, ctl);
 152         }
 153
 154         /* finish programming */
 155         cx_write(AUD_SOFT_RESET, 0x0000);
 156         cx_write(MO_AUD_DMACNTRL, 0x0003);
 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_DMD_RA_DDS,        0x00c0d5ce },
 317                 {AUD_ERRLOGPERIOD_R, 0x00000fff},
 318                 {AUD_ERRINTRPTTHSHLD1_R, 0x000003ff},
 319                 {AUD_ERRINTRPTTHSHLD2_R, 0x000000ff},
 320                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000003f},
 321                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 322                 {AUD_DEEMPHGAIN_R, 0x000023c2},
 323                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 324                 {AUD_DEEMPHNUMER2_R, 0x0003023e},
 325                 {AUD_DEEMPHDENOM1_R, 0x0000f3d0},
 326                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 327                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 328                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 329                 {AUD_QAM_MODE, 0x05},
 330                 { /* end of list */ },
 331         };
 332
 333         static const struct rlist nicam_i[] = {
 334                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 335                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 336                 {AUD_PHACC_FREQ_8LSB, 0x93},
 337                 { /* end of list */ },
 338         };
 339
 340         static const struct rlist nicam_default[] = {
 341                 {AUD_PDF_DDS_CNST_BYTE0, 0x16},
 342                 {AUD_PHACC_FREQ_8MSB, 0x34},
 343                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 344                 { /* end of list */ },
 345         };
 346
 347         set_audio_start(core,SEL_NICAM);
 348         switch (core->tvaudio) {
 349         case WW_L:
 350                 dprintk("%s SECAM-L NICAM (status: devel)\n", __FUNCTION__);
 351                 set_audio_registers(core, nicam_l);
 352                 break;
 353         case WW_I:
 354                 dprintk("%s PAL-I NICAM (status: devel)\n", __FUNCTION__);
 355                 set_audio_registers(core, nicam_bgdki_common);
 356                 set_audio_registers(core, nicam_i);
 357                 break;
 358         default:
 359                 dprintk("%s PAL-BGDK NICAM (status: unknown)\n", __FUNCTION__);
 360                 set_audio_registers(core, nicam_bgdki_common);
 361                 set_audio_registers(core, nicam_default);
 362                 break;
 363         };
 364
 365         mode |= EN_DMTRX_LR | EN_DMTRX_BYPASS;
 366         set_audio_finish(core, mode);
 367 }
 368
 369 static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
 370 {
 371         static const struct rlist a2_bgdk_common[] = {
 372                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 373                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 374                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 375                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 376                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 377                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 378                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 379                 {AUD_QAM_MODE, 0x05},
 380                 {AUD_PHACC_FREQ_8MSB, 0x34},
 381                 {AUD_PHACC_FREQ_8LSB, 0x4c},
 382                 {AUD_RATE_ADJ1, 0x00000100},
 383                 {AUD_RATE_ADJ2, 0x00000200},
 384                 {AUD_RATE_ADJ3, 0x00000300},
 385                 {AUD_RATE_ADJ4, 0x00000400},
 386                 {AUD_RATE_ADJ5, 0x00000500},
 387                 {AUD_THR_FR, 0x00000000},
 388                 {AAGC_HYST, 0x0000001a},
 389                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 390                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 391                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 392                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 393                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 394                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 395                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 396                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 397                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 398                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 399                 {AUD_MODE_CHG_TIMER, 0x00000040},
 400                 {AUD_AFE_12DB_EN, 0x00000001},
 401                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 402                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 403                 {AUD_DEEMPH0_G0, 0x00000380},
 404                 {AUD_DEEMPH1_G0, 0x00000380},
 405                 {AUD_DCOC_0_SRC, 0x0000001a},
 406                 {AUD_DCOC0_SHIFT, 0x00000000},
 407                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 408                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 409                 {AUD_DCOC_PASS_IN, 0x00000003},
 410                 {AUD_IIR3_0_SEL, 0x00000021},
 411                 {AUD_DN2_AFC, 0x00000002},
 412                 {AUD_DCOC_1_SRC, 0x0000001b},
 413                 {AUD_DCOC1_SHIFT, 0x00000000},
 414                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 415                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 416                 {AUD_IIR3_1_SEL, 0x00000023},
 417                 {AUD_RDSI_SEL, 0x00000017},
 418                 {AUD_RDSI_SHIFT, 0x00000000},
 419                 {AUD_RDSQ_SEL, 0x00000017},
 420                 {AUD_RDSQ_SHIFT, 0x00000000},
 421                 {AUD_PLL_INT, 0x0000001e},
 422                 {AUD_PLL_DDS, 0x00000000},
 423                 {AUD_PLL_FRAC, 0x0000e542},
 424                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 425                 {AUD_START_TIMER, 0x00000000},
 426                 { /* end of list */ },
 427         };
 428
 429         static const struct rlist a2_bg[] = {
 430                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 431                 {AUD_C1_UP_THR, 0x00007000},
 432                 {AUD_C1_LO_THR, 0x00005400},
 433                 {AUD_C2_UP_THR, 0x00005400},
 434                 {AUD_C2_LO_THR, 0x00003000},
 435                 { /* end of list */ },
 436         };
 437
 438         static const struct rlist a2_dk[] = {
 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                 {AUD_DN0_FREQ, 0x00003a1c},
 445                 {AUD_DN2_FREQ, 0x0000d2e0},
 446                 { /* end of list */ },
 447         };
 448
 449         static const struct rlist a1_i[] = {
 450                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 451                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000fff},
 452                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001f},
 453                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000f},
 454                 {AUD_PDF_DDS_CNST_BYTE2, 0x06},
 455                 {AUD_PDF_DDS_CNST_BYTE1, 0x82},
 456                 {AUD_PDF_DDS_CNST_BYTE0, 0x12},
 457                 {AUD_QAM_MODE, 0x05},
 458                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 459                 {AUD_PHACC_FREQ_8LSB, 0x93},
 460                 {AUD_DMD_RA_DDS, 0x002a4f2f},
 461                 {AUD_PLL_INT, 0x0000001e},
 462                 {AUD_PLL_DDS, 0x00000004},
 463                 {AUD_PLL_FRAC, 0x0000e542},
 464                 {AUD_RATE_ADJ1, 0x00000100},
 465                 {AUD_RATE_ADJ2, 0x00000200},
 466                 {AUD_RATE_ADJ3, 0x00000300},
 467                 {AUD_RATE_ADJ4, 0x00000400},
 468                 {AUD_RATE_ADJ5, 0x00000500},
 469                 {AUD_THR_FR, 0x00000000},
 470                 {AUD_PILOT_BQD_1_K0, 0x0000755b},
 471                 {AUD_PILOT_BQD_1_K1, 0x00551340},
 472                 {AUD_PILOT_BQD_1_K2, 0x006d30be},
 473                 {AUD_PILOT_BQD_1_K3, 0xffd394af},
 474                 {AUD_PILOT_BQD_1_K4, 0x00400000},
 475                 {AUD_PILOT_BQD_2_K0, 0x00040000},
 476                 {AUD_PILOT_BQD_2_K1, 0x002a4841},
 477                 {AUD_PILOT_BQD_2_K2, 0x00400000},
 478                 {AUD_PILOT_BQD_2_K3, 0x00000000},
 479                 {AUD_PILOT_BQD_2_K4, 0x00000000},
 480                 {AUD_MODE_CHG_TIMER, 0x00000060},
 481                 {AUD_AFE_12DB_EN, 0x00000001},
 482                 {AAGC_HYST, 0x0000000a},
 483                 {AUD_CORDIC_SHIFT_0, 0x00000007},
 484                 {AUD_CORDIC_SHIFT_1, 0x00000007},
 485                 {AUD_C1_UP_THR, 0x00007000},
 486                 {AUD_C1_LO_THR, 0x00005400},
 487                 {AUD_C2_UP_THR, 0x00005400},
 488                 {AUD_C2_LO_THR, 0x00003000},
 489                 {AUD_DCOC_0_SRC, 0x0000001a},
 490                 {AUD_DCOC0_SHIFT, 0x00000000},
 491                 {AUD_DCOC_0_SHIFT_IN0, 0x0000000a},
 492                 {AUD_DCOC_0_SHIFT_IN1, 0x00000008},
 493                 {AUD_DCOC_PASS_IN, 0x00000003},
 494                 {AUD_IIR3_0_SEL, 0x00000021},
 495                 {AUD_DN2_AFC, 0x00000002},
 496                 {AUD_DCOC_1_SRC, 0x0000001b},
 497                 {AUD_DCOC1_SHIFT, 0x00000000},
 498                 {AUD_DCOC_1_SHIFT_IN0, 0x0000000a},
 499                 {AUD_DCOC_1_SHIFT_IN1, 0x00000008},
 500                 {AUD_IIR3_1_SEL, 0x00000023},
 501                 {AUD_DN0_FREQ, 0x000035a3},
 502                 {AUD_DN2_FREQ, 0x000029c7},
 503                 {AUD_CRDC0_SRC_SEL, 0x00000511},
 504                 {AUD_IIR1_0_SEL, 0x00000001},
 505                 {AUD_IIR1_1_SEL, 0x00000000},
 506                 {AUD_IIR3_2_SEL, 0x00000003},
 507                 {AUD_IIR3_2_SHIFT, 0x00000000},
 508                 {AUD_IIR3_0_SEL, 0x00000002},
 509                 {AUD_IIR2_0_SEL, 0x00000021},
 510                 {AUD_IIR2_0_SHIFT, 0x00000002},
 511                 {AUD_DEEMPH0_SRC_SEL, 0x0000000b},
 512                 {AUD_DEEMPH1_SRC_SEL, 0x0000000b},
 513                 {AUD_POLYPH80SCALEFAC, 0x00000001},
 514                 {AUD_START_TIMER, 0x00000000},
 515                 { /* end of list */ },
 516         };
 517
 518         static const struct rlist am_l[] = {
 519                 {AUD_ERRLOGPERIOD_R, 0x00000064},
 520                 {AUD_ERRINTRPTTHSHLD1_R, 0x00000FFF},
 521                 {AUD_ERRINTRPTTHSHLD2_R, 0x0000001F},
 522                 {AUD_ERRINTRPTTHSHLD3_R, 0x0000000F},
 523                 {AUD_PDF_DDS_CNST_BYTE2, 0x48},
 524                 {AUD_PDF_DDS_CNST_BYTE1, 0x3D},
 525                 {AUD_QAM_MODE, 0x00},
 526                 {AUD_PDF_DDS_CNST_BYTE0, 0xf5},
 527                 {AUD_PHACC_FREQ_8MSB, 0x3a},
 528                 {AUD_PHACC_FREQ_8LSB, 0x4a},
 529                 {AUD_DEEMPHGAIN_R, 0x00006680},
 530                 {AUD_DEEMPHNUMER1_R, 0x000353DE},
 531                 {AUD_DEEMPHNUMER2_R, 0x000001B1},
 532                 {AUD_DEEMPHDENOM1_R, 0x0000F3D0},
 533                 {AUD_DEEMPHDENOM2_R, 0x00000000},
 534                 {AUD_FM_MODE_ENABLE, 0x00000007},
 535                 {AUD_POLYPH80SCALEFAC, 0x00000003},
 536                 {AUD_AFE_12DB_EN, 0x00000001},
 537                 {AAGC_GAIN, 0x00000000},
 538                 {AAGC_HYST, 0x00000018},
 539                 {AAGC_DEF, 0x00000020},
 540                 {AUD_DN0_FREQ, 0x00000000},
 541                 {AUD_POLY0_DDS_CONSTANT, 0x000E4DB2},
 542                 {AUD_DCOC_0_SRC, 0x00000021},
 543                 {AUD_IIR1_0_SEL, 0x00000000},
 544                 {AUD_IIR1_0_SHIFT, 0x00000007},
 545                 {AUD_IIR1_1_SEL, 0x00000002},
 546                 {AUD_IIR1_1_SHIFT, 0x00000000},
 547                 {AUD_DCOC_1_SRC, 0x00000003},
 548                 {AUD_DCOC1_SHIFT, 0x00000000},
 549                 {AUD_DCOC_PASS_IN, 0x00000000},
 550                 {AUD_IIR1_2_SEL, 0x00000023},
 551                 {AUD_IIR1_2_SHIFT, 0x00000000},
 552                 {AUD_IIR1_3_SEL, 0x00000004},
 553                 {AUD_IIR1_3_SHIFT, 0x00000007},
 554                 {AUD_IIR1_4_SEL, 0x00000005},
 555                 {AUD_IIR1_4_SHIFT, 0x00000007},
 556                 {AUD_IIR3_0_SEL, 0x00000007},
 557                 {AUD_IIR3_0_SHIFT, 0x00000000},
 558                 {AUD_DEEMPH0_SRC_SEL, 0x00000011},
 559                 {AUD_DEEMPH0_SHIFT, 0x00000000},
 560                 {AUD_DEEMPH0_G0, 0x00007000},
 561                 {AUD_DEEMPH0_A0, 0x00000000},
 562                 {AUD_DEEMPH0_B0, 0x00000000},
 563                 {AUD_DEEMPH0_A1, 0x00000000},
 564                 {AUD_DEEMPH0_B1, 0x00000000},
 565                 {AUD_DEEMPH1_SRC_SEL, 0x00000011},
 566                 {AUD_DEEMPH1_SHIFT, 0x00000000},
 567                 {AUD_DEEMPH1_G0, 0x00007000},
 568                 {AUD_DEEMPH1_A0, 0x00000000},
 569                 {AUD_DEEMPH1_B0, 0x00000000},
 570                 {AUD_DEEMPH1_A1, 0x00000000},
 571                 {AUD_DEEMPH1_B1, 0x00000000},
 572                 {AUD_OUT0_SEL, 0x0000003F},
 573                 {AUD_OUT1_SEL, 0x0000003F},
 574                 {AUD_DMD_RA_DDS, 0x00F5C285},
 575                 {AUD_PLL_INT, 0x0000001E},
 576                 {AUD_PLL_DDS, 0x00000000},
 577                 {AUD_PLL_FRAC, 0x0000E542},
 578                 {AUD_RATE_ADJ1, 0x00000100},
 579                 {AUD_RATE_ADJ2, 0x00000200},
 580                 {AUD_RATE_ADJ3, 0x00000300},
 581                 {AUD_RATE_ADJ4, 0x00000400},
 582                 {AUD_RATE_ADJ5, 0x00000500},
 583                 {AUD_RATE_THRES_DMD, 0x000000C0},
 584                 { /* end of list */ },
 585         };
 586
 587         static const struct rlist a2_deemph50[] = {
 588                 {AUD_DEEMPH0_G0, 0x00000380},
 589                 {AUD_DEEMPH1_G0, 0x00000380},
 590                 {AUD_DEEMPHGAIN_R, 0x000011e1},
 591                 {AUD_DEEMPHNUMER1_R, 0x0002a7bc},
 592                 {AUD_DEEMPHNUMER2_R, 0x0003023c},
 593                 { /* end of list */ },
 594         };
 595
 596         set_audio_start(core, SEL_A2);
 597         switch (core->tvaudio) {
 598         case WW_BG:
 599                 dprintk("%s PAL-BG A1/2 (status: known-good)\n", __FUNCTION__);
 600                 set_audio_registers(core, a2_bgdk_common);
 601                 set_audio_registers(core, a2_bg);
 602                 set_audio_registers(core, a2_deemph50);
 603                 break;
 604         case WW_DK:
 605                 dprintk("%s PAL-DK A1/2 (status: known-good)\n", __FUNCTION__);
 606                 set_audio_registers(core, a2_bgdk_common);
 607                 set_audio_registers(core, a2_dk);
 608                 set_audio_registers(core, a2_deemph50);
 609                 break;
 610         case WW_I:
 611                 dprintk("%s PAL-I A1 (status: known-good)\n", __FUNCTION__);
 612                 set_audio_registers(core, a1_i);
 613                 set_audio_registers(core, a2_deemph50);
 614                 break;
 615         case WW_L:
 616                 dprintk("%s AM-L (status: devel)\n", __FUNCTION__);
 617                 set_audio_registers(core, am_l);
 618                 break;
 619         default:
 620                 dprintk("%s Warning: wrong value\n", __FUNCTION__);
 621                 return;
 622                 break;
 623         };
 624
 625         mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
 626         set_audio_finish(core, mode);
 627 }
 628
 629 static void set_audio_standard_EIAJ(struct cx88_core *core)
 630 {
 631         static const struct rlist eiaj[] = {
 632                 /* TODO: eiaj register settings are not there yet ... */
 633
 634                 { /* end of list */ },
 635         };
 636         dprintk("%s (status: unknown)\n", __FUNCTION__);
 637
 638         set_audio_start(core, SEL_EIAJ);
 639         set_audio_registers(core, eiaj);
 640         set_audio_finish(core, EN_EIAJ_AUTO_STEREO);
 641 }
 642
 643 static void set_audio_standard_FM(struct cx88_core *core,
 644                                   enum cx88_deemph_type deemph)
 645 {
 646         static const struct rlist fm_deemph_50[] = {
 647                 {AUD_DEEMPH0_G0, 0x0C45},
 648                 {AUD_DEEMPH0_A0, 0x6262},
 649                 {AUD_DEEMPH0_B0, 0x1C29},
 650                 {AUD_DEEMPH0_A1, 0x3FC66},
 651                 {AUD_DEEMPH0_B1, 0x399A},
 652
 653                 {AUD_DEEMPH1_G0, 0x0D80},
 654                 {AUD_DEEMPH1_A0, 0x6262},
 655                 {AUD_DEEMPH1_B0, 0x1C29},
 656                 {AUD_DEEMPH1_A1, 0x3FC66},
 657                 {AUD_DEEMPH1_B1, 0x399A},
 658
 659                 {AUD_POLYPH80SCALEFAC, 0x0003},
 660                 { /* end of list */ },
 661         };
 662         static const struct rlist fm_deemph_75[] = {
 663                 {AUD_DEEMPH0_G0, 0x091B},
 664                 {AUD_DEEMPH0_A0, 0x6B68},
 665                 {AUD_DEEMPH0_B0, 0x11EC},
 666                 {AUD_DEEMPH0_A1, 0x3FC66},
 667                 {AUD_DEEMPH0_B1, 0x399A},
 668
 669                 {AUD_DEEMPH1_G0, 0x0AA0},
 670                 {AUD_DEEMPH1_A0, 0x6B68},
 671                 {AUD_DEEMPH1_B0, 0x11EC},
 672                 {AUD_DEEMPH1_A1, 0x3FC66},
 673                 {AUD_DEEMPH1_B1, 0x399A},
 674
 675                 {AUD_POLYPH80SCALEFAC, 0x0003},
 676                 { /* end of list */ },
 677         };
 678
 679         /* It is enough to leave default values? */
 680         static const struct rlist fm_no_deemph[] = {
 681
 682                 {AUD_POLYPH80SCALEFAC, 0x0003},
 683                 { /* end of list */ },
 684         };
 685
 686         dprintk("%s (status: unknown)\n", __FUNCTION__);
 687         set_audio_start(core, SEL_FMRADIO);
 688
 689         switch (deemph) {
 690         case FM_NO_DEEMPH:
 691                 set_audio_registers(core, fm_no_deemph);
 692                 break;
 693
 694         case FM_DEEMPH_50:
 695                 set_audio_registers(core, fm_deemph_50);
 696                 break;
 697
 698         case FM_DEEMPH_75:
 699                 set_audio_registers(core, fm_deemph_75);
 700                 break;
 701         }
 702
 703         set_audio_finish(core, EN_FMRADIO_AUTO_STEREO);
 704 }
 705
 706 /* ----------------------------------------------------------- */
 707
 708 int cx88_detect_nicam(struct cx88_core *core)
 709 {
 710         int i, j = 0;
 711
 712         dprintk("start nicam autodetect.\n");
 713
 714         for (i = 0; i < 6; i++) {
 715                 /* if bit1=1 then nicam is detected */
 716                 j += ((cx_read(AUD_NICAM_STATUS2) & 0x02) >> 1);
 717
 718                 /* 3x detected: absolutly sure now */
 719                 if (j == 3) {
 720                         dprintk("nicam is detected.\n");
 721                         return 1;
 722                 }
 723
 724                 /* wait a little bit for next reading status */
 725                 msleep(10);
 726         }
 727
 728         dprintk("nicam is not detected.\n");
 729         return 0;
 730 }
 731
 732 void cx88_set_tvaudio(struct cx88_core *core)
 733 {
 734         switch (core->tvaudio) {
 735         case WW_BTSC:
 736                 set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 737                 break;
 738         case WW_BG:
 739         case WW_DK:
 740         case WW_I:
 741         case WW_L:
 742                 /* prepare all dsp registers */
 743                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 744
 745                 /* set nicam mode - otherwise
 746                    AUD_NICAM_STATUS2 contains wrong values */
 747                 set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
 748                 if (0 == cx88_detect_nicam(core)) {
 749                         /* fall back to fm / am mono */
 750                         set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 751                         core->use_nicam = 0;
 752                 } else {
 753                         core->use_nicam = 1;
 754                 }
 755                 break;
 756         case WW_EIAJ:
 757                 set_audio_standard_EIAJ(core);
 758                 break;
 759         case WW_FM:
 760                 set_audio_standard_FM(core, FM_NO_DEEMPH);
 761                 break;
 762         case WW_NONE:
 763         default:
 764                 printk("%s/0: unknown tv audio mode [%d]\n",
 765                        core->name, core->tvaudio);
 766                 break;
 767         }
 768         return;
 769 }
 770
 771 void cx88_newstation(struct cx88_core *core)
 772 {
 773         core->audiomode_manual = UNSET;
 774 }
 775
 776 void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
 777 {
 778         static char *m[] = { "stereo", "dual mono", "mono", "sap" };
 779         static char *p[] = { "no pilot", "pilot c1", "pilot c2", "?" };
 780         u32 reg, mode, pilot;
 781
 782         reg = cx_read(AUD_STATUS);
 783         mode = reg & 0x03;
 784         pilot = (reg >> 2) & 0x03;
 785
 786         if (core->astat != reg)
 787                 dprintk("AUD_STATUS: 0x%x [%s/%s] ctl=%s\n",
 788                         reg, m[mode], p[pilot],
 789                         aud_ctl_names[cx_read(AUD_CTL) & 63]);
 790         core->astat = reg;
 791
 792 /* TODO
 793        Reading from AUD_STATUS is not enough
 794        for auto-detecting sap/dual-fm/nicam.
 795        Add some code here later.
 796 */
 797
 798 # if 0
 799         t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP |
 800             V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
 801         t->rxsubchans = V4L2_TUNER_SUB_MONO;
 802         t->audmode = V4L2_TUNER_MODE_MONO;
 803
 804         switch (core->tvaudio) {
 805         case WW_BTSC:
 806                 t->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_SAP;
 807                 t->rxsubchans = V4L2_TUNER_SUB_STEREO;
 808                 if (1 == pilot) {
 809                         /* SAP */
 810                         t->rxsubchans |= V4L2_TUNER_SUB_SAP;
 811                 }
 812                 break;
 813         case WW_A2_BG:
 814         case WW_A2_DK:
 815         case WW_A2_M:
 816                 if (1 == pilot) {
 817                         /* stereo */
 818                         t->rxsubchans =
 819                             V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
 820                         if (0 == mode)
 821                                 t->audmode = V4L2_TUNER_MODE_STEREO;
 822                 }
 823                 if (2 == pilot) {
 824                         /* dual language -- FIXME */
 825                         t->rxsubchans =
 826                             V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
 827                         t->audmode = V4L2_TUNER_MODE_LANG1;
 828                 }
 829                 break;
 830         case WW_NICAM_BGDKL:
 831                 if (0 == mode) {
 832                         t->audmode = V4L2_TUNER_MODE_STEREO;
 833                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 834                 }
 835                 break;
 836         case WW_SYSTEM_L_AM:
 837                 if (0x0 == mode && !(cx_read(AUD_INIT) & 0x04)) {
 838                         t->audmode = V4L2_TUNER_MODE_STEREO;
 839                         t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
 840                 }
 841                 break;
 842         default:
 843                 /* nothing */
 844                 break;
 845         }
 846 # endif
 847         return;
 848 }
 849
 850 void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
 851 {
 852         u32 ctl = UNSET;
 853         u32 mask = UNSET;
 854
 855         if (manual) {
 856                 core->audiomode_manual = mode;
 857         } else {
 858                 if (UNSET != core->audiomode_manual)
 859                         return;
 860         }
 861         core->audiomode_current = mode;
 862
 863         switch (core->tvaudio) {
 864         case WW_BTSC:
 865                 switch (mode) {
 866                 case V4L2_TUNER_MODE_MONO:
 867                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_MONO);
 868                         break;
 869                 case V4L2_TUNER_MODE_LANG1:
 870                         set_audio_standard_BTSC(core, 0, EN_BTSC_AUTO_STEREO);
 871                         break;
 872                 case V4L2_TUNER_MODE_LANG2:
 873                         set_audio_standard_BTSC(core, 1, EN_BTSC_FORCE_SAP);
 874                         break;
 875                 case V4L2_TUNER_MODE_STEREO:
 876                         set_audio_standard_BTSC(core, 0, EN_BTSC_FORCE_STEREO);
 877                         break;
 878                 }
 879                 break;
 880         case WW_BG:
 881         case WW_DK:
 882         case WW_I:
 883         case WW_L:
 884                 if (1 == core->use_nicam) {
 885                         switch (mode) {
 886                         case V4L2_TUNER_MODE_MONO:
 887                         case V4L2_TUNER_MODE_LANG1:
 888                                 set_audio_standard_NICAM(core,
 889                                                          EN_NICAM_FORCE_MONO1);
 890                                 break;
 891                         case V4L2_TUNER_MODE_LANG2:
 892                                 set_audio_standard_NICAM(core,
 893                                                          EN_NICAM_FORCE_MONO2);
 894                                 break;
 895                         case V4L2_TUNER_MODE_STEREO:
 896                                 set_audio_standard_NICAM(core,
 897                                                          EN_NICAM_FORCE_STEREO);
 898                                 break;
 899                         }
 900                 } else {
 901                         if ((core->tvaudio == WW_I) || (core->tvaudio == WW_L)) {
 902                                 /* fall back to fm / am mono */
 903                                 set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
 904                         } else {
 905                                 /* TODO: Add A2 autodection */
 906                                 switch (mode) {
 907                                 case V4L2_TUNER_MODE_MONO:
 908                                 case V4L2_TUNER_MODE_LANG1:
 909                                         set_audio_standard_A2(core,
 910                                                               EN_A2_FORCE_MONO1);
 911                                         break;
 912                                 case V4L2_TUNER_MODE_LANG2:
 913                                         set_audio_standard_A2(core,
 914                                                               EN_A2_FORCE_MONO2);
 915                                         break;
 916                                 case V4L2_TUNER_MODE_STEREO:
 917                                         set_audio_standard_A2(core,
 918                                                               EN_A2_FORCE_STEREO);
 919                                         break;
 920                                 }
 921                         }
 922                 }
 923                 break;
 924         case WW_FM:
 925                 switch (mode) {
 926                 case V4L2_TUNER_MODE_MONO:
 927                         ctl = EN_FMRADIO_FORCE_MONO;
 928                         mask = 0x3f;
 929                         break;
 930                 case V4L2_TUNER_MODE_STEREO:
 931                         ctl = EN_FMRADIO_AUTO_STEREO;
 932                         mask = 0x3f;
 933                         break;
 934                 }
 935                 break;
 936         }
 937
 938         if (UNSET != ctl) {
 939                 dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x "
 940                         "[status=0x%x,ctl=0x%x,vol=0x%x]\n",
 941                         mask, ctl, cx_read(AUD_STATUS),
 942                         cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
 943                 cx_andor(AUD_CTL, mask, ctl);
 944         }
 945         return;
 946 }
 947
 948 int cx88_audio_thread(void *data)
 949 {
 950         struct cx88_core *core = data;
 951         struct v4l2_tuner t;
 952         u32 mode = 0;
 953
 954         dprintk("cx88: tvaudio thread started\n");
 955         for (;;) {
 956                 msleep_interruptible(1000);
 957                 if (kthread_should_stop())
 958                         break;
 959
 960                 /* just monitor the audio status for now ... */
 961                 memset(&t, 0, sizeof(t));
 962                 cx88_get_stereo(core, &t);
 963
 964                 if (UNSET != core->audiomode_manual)
 965                         /* manually set, don't do anything. */
 966                         continue;
 967
 968                 /* monitor signal */
 969                 if (t.rxsubchans & V4L2_TUNER_SUB_STEREO)
 970                         mode = V4L2_TUNER_MODE_STEREO;
 971                 else
 972                         mode = V4L2_TUNER_MODE_MONO;
 973                 if (mode == core->audiomode_current)
 974                         continue;
 975
 976                 /* automatically switch to best available mode */
 977                 cx88_set_stereo(core, mode, 0);
 978         }
 979
 980         dprintk("cx88: tvaudio thread exiting\n");
 981         return 0;
 982 }
 983
 984 /* ----------------------------------------------------------- */
 985
 986 EXPORT_SYMBOL(cx88_set_tvaudio);
 987 EXPORT_SYMBOL(cx88_newstation);
 988 EXPORT_SYMBOL(cx88_set_stereo);
 989 EXPORT_SYMBOL(cx88_get_stereo);
 990 EXPORT_SYMBOL(cx88_audio_thread);
 991
 992 /*
 993  * Local variables:
 994  * c-basic-offset: 8
 995  * End:
 996  * 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
 997  */