hw/wm8750.c

   1 /*
   2  * WM8750 audio CODEC.
   3  *
   4  * Copyright (c) 2006 Openedhand Ltd.
   5  * Written by Andrzej Zaborowski <balrog@zabor.org>
   6  *
   7  * This file is licensed under GNU GPL.
   8  */
   9
  10 #include "hw.h"
  11 #include "i2c.h"
  12 #include "audio/audio.h"
  13
  14 #define IN_PORT_N       3
  15 #define OUT_PORT_N      3
  16
  17 #define CODEC           "wm8750"
  18
  19 struct wm_rate_s;
  20 struct wm8750_s {
  21     i2c_slave i2c;
  22     uint8_t i2c_data[2];
  23     int i2c_len;
  24     QEMUSoundCard card;
  25     SWVoiceIn *adc_voice[IN_PORT_N];
  26     SWVoiceOut *dac_voice[OUT_PORT_N];
  27     int enable;
  28     void (*data_req)(void *, int, int);
  29     void *opaque;
  30     uint8_t data_in[4096];
  31     uint8_t data_out[4096];
  32     int idx_in, req_in;
  33     int idx_out, req_out;
  34
  35     SWVoiceOut **out[2];
  36     uint8_t outvol[7], outmute[2];
  37     SWVoiceIn **in[2];
  38     uint8_t invol[4], inmute[2];
  39
  40     uint8_t diff[2], pol, ds, monomix[2], alc, mute;
  41     uint8_t path[4], mpath[2], power, format;
  42     const struct wm_rate_s *rate;
  43     int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
  44 };
  45
  46 /* pow(10.0, -i / 20.0) * 255, i = 0..42 */
  47 static const uint8_t wm8750_vol_db_table[] = {
  48     255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
  49     40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
  50     4, 4, 3, 3, 3, 2, 2
  51 };
  52
  53 #define WM8750_OUTVOL_TRANSFORM(x)      wm8750_vol_db_table[(0x7f - x) / 3]
  54 #define WM8750_INVOL_TRANSFORM(x)       (x << 2)
  55
  56 static inline void wm8750_in_load(struct wm8750_s *s)
  57 {
  58     int acquired;
  59     if (s->idx_in + s->req_in <= sizeof(s->data_in))
  60         return;
  61     s->idx_in = audio_MAX(0, (int) sizeof(s->data_in) - s->req_in);
  62     acquired = AUD_read(*s->in[0], s->data_in + s->idx_in,
  63                     sizeof(s->data_in) - s->idx_in);
  64 }
  65
  66 static inline void wm8750_out_flush(struct wm8750_s *s)
  67 {
  68     int sent = 0;
  69     while (sent < s->idx_out)
  70         sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
  71                 ?: s->idx_out;
  72     s->idx_out = 0;
  73 }
  74
  75 static void wm8750_audio_in_cb(void *opaque, int avail_b)
  76 {
  77     struct wm8750_s *s = (struct wm8750_s *) opaque;
  78     s->req_in = avail_b;
  79     s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
  80 }
  81
  82 static void wm8750_audio_out_cb(void *opaque, int free_b)
  83 {
  84     struct wm8750_s *s = (struct wm8750_s *) opaque;
  85
  86     if (s->idx_out >= free_b) {
  87         s->idx_out = free_b;
  88         s->req_out = 0;
  89         wm8750_out_flush(s);
  90     } else
  91         s->req_out = free_b - s->idx_out;
  92
  93     s->data_req(s->opaque, s->req_out >> 2, s->req_in >> 2);
  94 }
  95
  96 struct wm_rate_s {
  97     int adc;
  98     int adc_hz;
  99     int dac;
 100     int dac_hz;
 101 };
 102
 103 static const struct wm_rate_s wm_rate_table[] = {
 104     {  256, 48000,  256, 48000 },       /* SR: 00000 */
 105     {  384, 48000,  384, 48000 },       /* SR: 00001 */
 106     {  256, 48000, 1536,  8000 },       /* SR: 00010 */
 107     {  384, 48000, 2304,  8000 },       /* SR: 00011 */
 108     { 1536,  8000,  256, 48000 },       /* SR: 00100 */
 109     { 2304,  8000,  384, 48000 },       /* SR: 00101 */
 110     { 1536,  8000, 1536,  8000 },       /* SR: 00110 */
 111     { 2304,  8000, 2304,  8000 },       /* SR: 00111 */
 112     { 1024, 12000, 1024, 12000 },       /* SR: 01000 */
 113     { 1526, 12000, 1536, 12000 },       /* SR: 01001 */
 114     {  768, 16000,  768, 16000 },       /* SR: 01010 */
 115     { 1152, 16000, 1152, 16000 },       /* SR: 01011 */
 116     {  384, 32000,  384, 32000 },       /* SR: 01100 */
 117     {  576, 32000,  576, 32000 },       /* SR: 01101 */
 118     {  128, 96000,  128, 96000 },       /* SR: 01110 */
 119     {  192, 96000,  192, 96000 },       /* SR: 01111 */
 120     {  256, 44100,  256, 44100 },       /* SR: 10000 */
 121     {  384, 44100,  384, 44100 },       /* SR: 10001 */
 122     {  256, 44100, 1408,  8018 },       /* SR: 10010 */
 123     {  384, 44100, 2112,  8018 },       /* SR: 10011 */
 124     { 1408,  8018,  256, 44100 },       /* SR: 10100 */
 125     { 2112,  8018,  384, 44100 },       /* SR: 10101 */
 126     { 1408,  8018, 1408,  8018 },       /* SR: 10110 */
 127     { 2112,  8018, 2112,  8018 },       /* SR: 10111 */
 128     { 1024, 11025, 1024, 11025 },       /* SR: 11000 */
 129     { 1536, 11025, 1536, 11025 },       /* SR: 11001 */
 130     {  512, 22050,  512, 22050 },       /* SR: 11010 */
 131     {  768, 22050,  768, 22050 },       /* SR: 11011 */
 132     {  512, 24000,  512, 24000 },       /* SR: 11100 */
 133     {  768, 24000,  768, 24000 },       /* SR: 11101 */
 134     {  128, 88200,  128, 88200 },       /* SR: 11110 */
 135     {  192, 88200,  192, 88200 },       /* SR: 11111 */
 136 };
 137
 138 static void wm8750_vol_update(struct wm8750_s *s)
 139 {
 140     /* FIXME: multiply all volumes by s->invol[2], s->invol[3] */
 141
 142     AUD_set_volume_in(s->adc_voice[0], s->mute,
 143                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 144                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 145     AUD_set_volume_in(s->adc_voice[1], s->mute,
 146                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 147                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 148     AUD_set_volume_in(s->adc_voice[2], s->mute,
 149                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 150                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 151
 152     /* FIXME: multiply all volumes by s->outvol[0], s->outvol[1] */
 153
 154     /* Speaker: LOUT2VOL ROUT2VOL */
 155     AUD_set_volume_out(s->dac_voice[0], s->mute,
 156                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
 157                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
 158
 159     /* Headphone: LOUT1VOL ROUT1VOL */
 160     AUD_set_volume_out(s->dac_voice[1], s->mute,
 161                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[2]),
 162                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[3]));
 163
 164     /* MONOOUT: MONOVOL MONOVOL */
 165     AUD_set_volume_out(s->dac_voice[2], s->mute,
 166                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
 167                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]));
 168 }
 169
 170 static void wm8750_set_format(struct wm8750_s *s)
 171 {
 172     int i;
 173     struct audsettings in_fmt;
 174     struct audsettings out_fmt;
 175     struct audsettings monoout_fmt;
 176
 177     wm8750_out_flush(s);
 178
 179     if (s->in[0] && *s->in[0])
 180         AUD_set_active_in(*s->in[0], 0);
 181     if (s->out[0] && *s->out[0])
 182         AUD_set_active_out(*s->out[0], 0);
 183
 184     for (i = 0; i < IN_PORT_N; i ++)
 185         if (s->adc_voice[i]) {
 186             AUD_close_in(&s->card, s->adc_voice[i]);
 187             s->adc_voice[i] = 0;
 188         }
 189     for (i = 0; i < OUT_PORT_N; i ++)
 190         if (s->dac_voice[i]) {
 191             AUD_close_out(&s->card, s->dac_voice[i]);
 192             s->dac_voice[i] = 0;
 193         }
 194
 195     if (!s->enable)
 196         return;
 197
 198     /* Setup input */
 199     in_fmt.endianness = 0;
 200     in_fmt.nchannels = 2;
 201     in_fmt.freq = s->adc_hz;
 202     in_fmt.fmt = AUD_FMT_S16;
 203
 204     s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
 205                     CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
 206     s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
 207                     CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
 208     s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
 209                     CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
 210
 211     /* Setup output */
 212     out_fmt.endianness = 0;
 213     out_fmt.nchannels = 2;
 214     out_fmt.freq = s->dac_hz;
 215     out_fmt.fmt = AUD_FMT_S16;
 216     monoout_fmt.endianness = 0;
 217     monoout_fmt.nchannels = 1;
 218     monoout_fmt.freq = s->rate->dac_hz;
 219     monoout_fmt.fmt = AUD_FMT_S16;
 220
 221     s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
 222                     CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
 223     s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
 224                     CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
 225     /* MONOMIX is also in stereo for simplicity */
 226     s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
 227                     CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
 228     /* no sense emulating OUT3 which is a mix of other outputs */
 229
 230     wm8750_vol_update(s);
 231
 232     /* We should connect the left and right channels to their
 233      * respective inputs/outputs but we have completely no need
 234      * for mixing or combining paths to different ports, so we
 235      * connect both channels to where the left channel is routed.  */
 236     if (s->in[0] && *s->in[0])
 237         AUD_set_active_in(*s->in[0], 1);
 238     if (s->out[0] && *s->out[0])
 239         AUD_set_active_out(*s->out[0], 1);
 240 }
 241
 242 static void wm8750_clk_update(struct wm8750_s *s, int ext)
 243 {
 244     if (s->master || !s->ext_dac_hz)
 245         s->dac_hz = s->rate->dac_hz;
 246     else
 247         s->dac_hz = s->ext_dac_hz;
 248
 249     if (s->master || !s->ext_adc_hz)
 250         s->adc_hz = s->rate->adc_hz;
 251     else
 252         s->adc_hz = s->ext_adc_hz;
 253
 254     if (s->master || (!s->ext_dac_hz && !s->ext_adc_hz)) {
 255         if (!ext)
 256             wm8750_set_format(s);
 257     } else {
 258         if (ext)
 259             wm8750_set_format(s);
 260     }
 261 }
 262
 263 void wm8750_reset(i2c_slave *i2c)
 264 {
 265     struct wm8750_s *s = (struct wm8750_s *) i2c;
 266     s->rate = &wm_rate_table[0];
 267     s->enable = 0;
 268     wm8750_clk_update(s, 1);
 269     s->diff[0] = 0;
 270     s->diff[1] = 0;
 271     s->ds = 0;
 272     s->alc = 0;
 273     s->in[0] = &s->adc_voice[0];
 274     s->invol[0] = 0x17;
 275     s->invol[1] = 0x17;
 276     s->invol[2] = 0xc3;
 277     s->invol[3] = 0xc3;
 278     s->out[0] = &s->dac_voice[0];
 279     s->outvol[0] = 0xff;
 280     s->outvol[1] = 0xff;
 281     s->outvol[2] = 0x79;
 282     s->outvol[3] = 0x79;
 283     s->outvol[4] = 0x79;
 284     s->outvol[5] = 0x79;
 285     s->outvol[6] = 0x79;
 286     s->inmute[0] = 0;
 287     s->inmute[1] = 0;
 288     s->outmute[0] = 0;
 289     s->outmute[1] = 0;
 290     s->mute = 1;
 291     s->path[0] = 0;
 292     s->path[1] = 0;
 293     s->path[2] = 0;
 294     s->path[3] = 0;
 295     s->mpath[0] = 0;
 296     s->mpath[1] = 0;
 297     s->format = 0x0a;
 298     s->idx_in = sizeof(s->data_in);
 299     s->req_in = 0;
 300     s->idx_out = 0;
 301     s->req_out = 0;
 302     wm8750_vol_update(s);
 303     s->i2c_len = 0;
 304 }
 305
 306 static void wm8750_event(i2c_slave *i2c, enum i2c_event event)
 307 {
 308     struct wm8750_s *s = (struct wm8750_s *) i2c;
 309
 310     switch (event) {
 311     case I2C_START_SEND:
 312         s->i2c_len = 0;
 313         break;
 314     case I2C_FINISH:
 315 #ifdef VERBOSE
 316         if (s->i2c_len < 2)
 317             printf("%s: message too short (%i bytes)\n",
 318                             __FUNCTION__, s->i2c_len);
 319 #endif
 320         break;
 321     default:
 322         break;
 323     }
 324 }
 325
 326 #define WM8750_LINVOL   0x00
 327 #define WM8750_RINVOL   0x01
 328 #define WM8750_LOUT1V   0x02
 329 #define WM8750_ROUT1V   0x03
 330 #define WM8750_ADCDAC   0x05
 331 #define WM8750_IFACE    0x07
 332 #define WM8750_SRATE    0x08
 333 #define WM8750_LDAC     0x0a
 334 #define WM8750_RDAC     0x0b
 335 #define WM8750_BASS     0x0c
 336 #define WM8750_TREBLE   0x0d
 337 #define WM8750_RESET    0x0f
 338 #define WM8750_3D       0x10
 339 #define WM8750_ALC1     0x11
 340 #define WM8750_ALC2     0x12
 341 #define WM8750_ALC3     0x13
 342 #define WM8750_NGATE    0x14
 343 #define WM8750_LADC     0x15
 344 #define WM8750_RADC     0x16
 345 #define WM8750_ADCTL1   0x17
 346 #define WM8750_ADCTL2   0x18
 347 #define WM8750_PWR1     0x19
 348 #define WM8750_PWR2     0x1a
 349 #define WM8750_ADCTL3   0x1b
 350 #define WM8750_ADCIN    0x1f
 351 #define WM8750_LADCIN   0x20
 352 #define WM8750_RADCIN   0x21
 353 #define WM8750_LOUTM1   0x22
 354 #define WM8750_LOUTM2   0x23
 355 #define WM8750_ROUTM1   0x24
 356 #define WM8750_ROUTM2   0x25
 357 #define WM8750_MOUTM1   0x26
 358 #define WM8750_MOUTM2   0x27
 359 #define WM8750_LOUT2V   0x28
 360 #define WM8750_ROUT2V   0x29
 361 #define WM8750_MOUTV    0x2a
 362
 363 static int wm8750_tx(i2c_slave *i2c, uint8_t data)
 364 {
 365     struct wm8750_s *s = (struct wm8750_s *) i2c;
 366     uint8_t cmd;
 367     uint16_t value;
 368
 369     if (s->i2c_len >= 2) {
 370         printf("%s: long message (%i bytes)\n", __FUNCTION__, s->i2c_len);
 371 #ifdef VERBOSE
 372         return 1;
 373 #endif
 374     }
 375     s->i2c_data[s->i2c_len ++] = data;
 376     if (s->i2c_len != 2)
 377         return 0;
 378
 379     cmd = s->i2c_data[0] >> 1;
 380     value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
 381
 382     switch (cmd) {
 383     case WM8750_LADCIN: /* ADC Signal Path Control (Left) */
 384         s->diff[0] = (((value >> 6) & 3) == 3); /* LINSEL */
 385         if (s->diff[0])
 386             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 387         else
 388             s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 389         break;
 390
 391     case WM8750_RADCIN: /* ADC Signal Path Control (Right) */
 392         s->diff[1] = (((value >> 6) & 3) == 3); /* RINSEL */
 393         if (s->diff[1])
 394             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 395         else
 396             s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 397         break;
 398
 399     case WM8750_ADCIN:  /* ADC Input Mode */
 400         s->ds = (value >> 8) & 1;       /* DS */
 401         if (s->diff[0])
 402             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 403         if (s->diff[1])
 404             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 405         s->monomix[0] = (value >> 6) & 3;       /* MONOMIX */
 406         break;
 407
 408     case WM8750_ADCTL1: /* Additional Control (1) */
 409         s->monomix[1] = (value >> 1) & 1;       /* DMONOMIX */
 410         break;
 411
 412     case WM8750_PWR1:   /* Power Management (1) */
 413         s->enable = ((value >> 6) & 7) == 3;    /* VMIDSEL, VREF */
 414         wm8750_set_format(s);
 415         break;
 416
 417     case WM8750_LINVOL: /* Left Channel PGA */
 418         s->invol[0] = value & 0x3f;             /* LINVOL */
 419         s->inmute[0] = (value >> 7) & 1;        /* LINMUTE */
 420         wm8750_vol_update(s);
 421         break;
 422
 423     case WM8750_RINVOL: /* Right Channel PGA */
 424         s->invol[1] = value & 0x3f;             /* RINVOL */
 425         s->inmute[1] = (value >> 7) & 1;        /* RINMUTE */
 426         wm8750_vol_update(s);
 427         break;
 428
 429     case WM8750_ADCDAC: /* ADC and DAC Control */
 430         s->pol = (value >> 5) & 3;              /* ADCPOL */
 431         s->mute = (value >> 3) & 1;             /* DACMU */
 432         wm8750_vol_update(s);
 433         break;
 434
 435     case WM8750_ADCTL3: /* Additional Control (3) */
 436         break;
 437
 438     case WM8750_LADC:   /* Left ADC Digital Volume */
 439         s->invol[2] = value & 0xff;             /* LADCVOL */
 440         wm8750_vol_update(s);
 441         break;
 442
 443     case WM8750_RADC:   /* Right ADC Digital Volume */
 444         s->invol[3] = value & 0xff;             /* RADCVOL */
 445         wm8750_vol_update(s);
 446         break;
 447
 448     case WM8750_ALC1:   /* ALC Control (1) */
 449         s->alc = (value >> 7) & 3;              /* ALCSEL */
 450         break;
 451
 452     case WM8750_NGATE:  /* Noise Gate Control */
 453     case WM8750_3D:     /* 3D enhance */
 454         break;
 455
 456     case WM8750_LDAC:   /* Left Channel Digital Volume */
 457         s->outvol[0] = value & 0xff;            /* LDACVOL */
 458         wm8750_vol_update(s);
 459         break;
 460
 461     case WM8750_RDAC:   /* Right Channel Digital Volume */
 462         s->outvol[1] = value & 0xff;            /* RDACVOL */
 463         wm8750_vol_update(s);
 464         break;
 465
 466     case WM8750_BASS:   /* Bass Control */
 467         break;
 468
 469     case WM8750_LOUTM1: /* Left Mixer Control (1) */
 470         s->path[0] = (value >> 8) & 1;          /* LD2LO */
 471         /* TODO: mute/unmute respective paths */
 472         wm8750_vol_update(s);
 473         break;
 474
 475     case WM8750_LOUTM2: /* Left Mixer Control (2) */
 476         s->path[1] = (value >> 8) & 1;          /* RD2LO */
 477         /* TODO: mute/unmute respective paths */
 478         wm8750_vol_update(s);
 479         break;
 480
 481     case WM8750_ROUTM1: /* Right Mixer Control (1) */
 482         s->path[2] = (value >> 8) & 1;          /* LD2RO */
 483         /* TODO: mute/unmute respective paths */
 484         wm8750_vol_update(s);
 485         break;
 486
 487     case WM8750_ROUTM2: /* Right Mixer Control (2) */
 488         s->path[3] = (value >> 8) & 1;          /* RD2RO */
 489         /* TODO: mute/unmute respective paths */
 490         wm8750_vol_update(s);
 491         break;
 492
 493     case WM8750_MOUTM1: /* Mono Mixer Control (1) */
 494         s->mpath[0] = (value >> 8) & 1;         /* LD2MO */
 495         /* TODO: mute/unmute respective paths */
 496         wm8750_vol_update(s);
 497         break;
 498
 499     case WM8750_MOUTM2: /* Mono Mixer Control (2) */
 500         s->mpath[1] = (value >> 8) & 1;         /* RD2MO */
 501         /* TODO: mute/unmute respective paths */
 502         wm8750_vol_update(s);
 503         break;
 504
 505     case WM8750_LOUT1V: /* LOUT1 Volume */
 506         s->outvol[2] = value & 0x7f;            /* LOUT1VOL */
 507         wm8750_vol_update(s);
 508         break;
 509
 510     case WM8750_LOUT2V: /* LOUT2 Volume */
 511         s->outvol[4] = value & 0x7f;            /* LOUT2VOL */
 512         wm8750_vol_update(s);
 513         break;
 514
 515     case WM8750_ROUT1V: /* ROUT1 Volume */
 516         s->outvol[3] = value & 0x7f;            /* ROUT1VOL */
 517         wm8750_vol_update(s);
 518         break;
 519
 520     case WM8750_ROUT2V: /* ROUT2 Volume */
 521         s->outvol[5] = value & 0x7f;            /* ROUT2VOL */
 522         wm8750_vol_update(s);
 523         break;
 524
 525     case WM8750_MOUTV:  /* MONOOUT Volume */
 526         s->outvol[6] = value & 0x7f;            /* MONOOUTVOL */
 527         wm8750_vol_update(s);
 528         break;
 529
 530     case WM8750_ADCTL2: /* Additional Control (2) */
 531         break;
 532
 533     case WM8750_PWR2:   /* Power Management (2) */
 534         s->power = value & 0x7e;
 535         /* TODO: mute/unmute respective paths */
 536         wm8750_vol_update(s);
 537         break;
 538
 539     case WM8750_IFACE:  /* Digital Audio Interface Format */
 540         s->format = value;
 541         s->master = (value >> 6) & 1;                   /* MS */
 542         wm8750_clk_update(s, s->master);
 543         break;
 544
 545     case WM8750_SRATE:  /* Clocking and Sample Rate Control */
 546         s->rate = &wm_rate_table[(value >> 1) & 0x1f];
 547         wm8750_clk_update(s, 0);
 548         break;
 549
 550     case WM8750_RESET:  /* Reset */
 551         wm8750_reset(&s->i2c);
 552         break;
 553
 554 #ifdef VERBOSE
 555     default:
 556         printf("%s: unknown register %02x\n", __FUNCTION__, cmd);
 557 #endif
 558     }
 559
 560     return 0;
 561 }
 562
 563 static int wm8750_rx(i2c_slave *i2c)
 564 {
 565     return 0x00;
 566 }
 567
 568 static void wm8750_save(QEMUFile *f, void *opaque)
 569 {
 570     struct wm8750_s *s = (struct wm8750_s *) opaque;
 571     int i;
 572     qemu_put_8s(f, &s->i2c_data[0]);
 573     qemu_put_8s(f, &s->i2c_data[1]);
 574     qemu_put_be32(f, s->i2c_len);
 575     qemu_put_be32(f, s->enable);
 576     qemu_put_be32(f, s->idx_in);
 577     qemu_put_be32(f, s->req_in);
 578     qemu_put_be32(f, s->idx_out);
 579     qemu_put_be32(f, s->req_out);
 580
 581     for (i = 0; i < 7; i ++)
 582         qemu_put_8s(f, &s->outvol[i]);
 583     for (i = 0; i < 2; i ++)
 584         qemu_put_8s(f, &s->outmute[i]);
 585     for (i = 0; i < 4; i ++)
 586         qemu_put_8s(f, &s->invol[i]);
 587     for (i = 0; i < 2; i ++)
 588         qemu_put_8s(f, &s->inmute[i]);
 589
 590     for (i = 0; i < 2; i ++)
 591         qemu_put_8s(f, &s->diff[i]);
 592     qemu_put_8s(f, &s->pol);
 593     qemu_put_8s(f, &s->ds);
 594     for (i = 0; i < 2; i ++)
 595         qemu_put_8s(f, &s->monomix[i]);
 596     qemu_put_8s(f, &s->alc);
 597     qemu_put_8s(f, &s->mute);
 598     for (i = 0; i < 4; i ++)
 599         qemu_put_8s(f, &s->path[i]);
 600     for (i = 0; i < 2; i ++)
 601         qemu_put_8s(f, &s->mpath[i]);
 602     qemu_put_8s(f, &s->format);
 603     qemu_put_8s(f, &s->power);
 604     qemu_put_byte(f, (s->rate - wm_rate_table) / sizeof(*s->rate));
 605     i2c_slave_save(f, &s->i2c);
 606 }
 607
 608 static int wm8750_load(QEMUFile *f, void *opaque, int version_id)
 609 {
 610     struct wm8750_s *s = (struct wm8750_s *) opaque;
 611     int i;
 612     qemu_get_8s(f, &s->i2c_data[0]);
 613     qemu_get_8s(f, &s->i2c_data[1]);
 614     s->i2c_len = qemu_get_be32(f);
 615     s->enable = qemu_get_be32(f);
 616     s->idx_in = qemu_get_be32(f);
 617     s->req_in = qemu_get_be32(f);
 618     s->idx_out = qemu_get_be32(f);
 619     s->req_out = qemu_get_be32(f);
 620
 621     for (i = 0; i < 7; i ++)
 622         qemu_get_8s(f, &s->outvol[i]);
 623     for (i = 0; i < 2; i ++)
 624         qemu_get_8s(f, &s->outmute[i]);
 625     for (i = 0; i < 4; i ++)
 626         qemu_get_8s(f, &s->invol[i]);
 627     for (i = 0; i < 2; i ++)
 628         qemu_get_8s(f, &s->inmute[i]);
 629
 630     for (i = 0; i < 2; i ++)
 631         qemu_get_8s(f, &s->diff[i]);
 632     qemu_get_8s(f, &s->pol);
 633     qemu_get_8s(f, &s->ds);
 634     for (i = 0; i < 2; i ++)
 635         qemu_get_8s(f, &s->monomix[i]);
 636     qemu_get_8s(f, &s->alc);
 637     qemu_get_8s(f, &s->mute);
 638     for (i = 0; i < 4; i ++)
 639         qemu_get_8s(f, &s->path[i]);
 640     for (i = 0; i < 2; i ++)
 641         qemu_get_8s(f, &s->mpath[i]);
 642     qemu_get_8s(f, &s->format);
 643     qemu_get_8s(f, &s->power);
 644     s->rate = &wm_rate_table[(uint8_t) qemu_get_byte(f) & 0x1f];
 645     i2c_slave_load(f, &s->i2c);
 646     return 0;
 647 }
 648
 649 i2c_slave *wm8750_init(i2c_bus *bus, AudioState *audio)
 650 {
 651     struct wm8750_s *s = (struct wm8750_s *)
 652             i2c_slave_init(bus, 0, sizeof(struct wm8750_s));
 653     s->i2c.event = wm8750_event;
 654     s->i2c.recv = wm8750_rx;
 655     s->i2c.send = wm8750_tx;
 656
 657     AUD_register_card(audio, CODEC, &s->card);
 658     wm8750_reset(&s->i2c);
 659
 660     register_savevm(CODEC, -1, 0, wm8750_save, wm8750_load, s);
 661
 662     return &s->i2c;
 663 }
 664
 665 #if 0
 666 static void wm8750_fini(i2c_slave *i2c)
 667 {
 668     struct wm8750_s *s = (struct wm8750_s *) i2c;
 669     wm8750_reset(&s->i2c);
 670     AUD_remove_card(&s->card);
 671     qemu_free(s);
 672 }
 673 #endif
 674
 675 void wm8750_data_req_set(i2c_slave *i2c,
 676                 void (*data_req)(void *, int, int), void *opaque)
 677 {
 678     struct wm8750_s *s = (struct wm8750_s *) i2c;
 679     s->data_req = data_req;
 680     s->opaque = opaque;
 681 }
 682
 683 void wm8750_dac_dat(void *opaque, uint32_t sample)
 684 {
 685     struct wm8750_s *s = (struct wm8750_s *) opaque;
 686
 687     *(uint32_t *) &s->data_out[s->idx_out] = sample;
 688     s->req_out -= 4;
 689     s->idx_out += 4;
 690     if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
 691         wm8750_out_flush(s);
 692 }
 693
 694 void *wm8750_dac_buffer(void *opaque, int samples)
 695 {
 696     struct wm8750_s *s = (struct wm8750_s *) opaque;
 697     /* XXX: Should check if there are <i>samples</i> free samples available */
 698     void *ret = s->data_out + s->idx_out;
 699
 700     s->idx_out += samples << 2;
 701     s->req_out -= samples << 2;
 702     return ret;
 703 }
 704
 705 void wm8750_dac_commit(void *opaque)
 706 {
 707     struct wm8750_s *s = (struct wm8750_s *) opaque;
 708
 709     return wm8750_out_flush(s);
 710 }
 711
 712 uint32_t wm8750_adc_dat(void *opaque)
 713 {
 714     struct wm8750_s *s = (struct wm8750_s *) opaque;
 715     uint32_t *data;
 716
 717     if (s->idx_in >= sizeof(s->data_in))
 718         wm8750_in_load(s);
 719
 720     data = (uint32_t *) &s->data_in[s->idx_in];
 721     s->req_in -= 4;
 722     s->idx_in += 4;
 723     return *data;
 724 }
 725
 726 void wm8750_set_bclk_in(void *opaque, int new_hz)
 727 {
 728     struct wm8750_s *s = (struct wm8750_s *) opaque;
 729
 730     s->ext_adc_hz = new_hz;
 731     s->ext_dac_hz = new_hz;
 732     wm8750_clk_update(s, 1);
 733 }