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/hw.h"
  11 #include "hw/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 typedef struct {
  20     int adc;
  21     int adc_hz;
  22     int dac;
  23     int dac_hz;
  24 } WMRate;
  25
  26 typedef struct {
  27     I2CSlave i2c;
  28     uint8_t i2c_data[2];
  29     int i2c_len;
  30     QEMUSoundCard card;
  31     SWVoiceIn *adc_voice[IN_PORT_N];
  32     SWVoiceOut *dac_voice[OUT_PORT_N];
  33     int enable;
  34     void (*data_req)(void *, int, int);
  35     void *opaque;
  36     uint8_t data_in[4096];
  37     uint8_t data_out[4096];
  38     int idx_in, req_in;
  39     int idx_out, req_out;
  40
  41     SWVoiceOut **out[2];
  42     uint8_t outvol[7], outmute[2];
  43     SWVoiceIn **in[2];
  44     uint8_t invol[4], inmute[2];
  45
  46     uint8_t diff[2], pol, ds, monomix[2], alc, mute;
  47     uint8_t path[4], mpath[2], power, format;
  48     const WMRate *rate;
  49     uint8_t rate_vmstate;
  50     int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
  51 } WM8750State;
  52
  53 /* pow(10.0, -i / 20.0) * 255, i = 0..42 */
  54 static const uint8_t wm8750_vol_db_table[] = {
  55     255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
  56     40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
  57     4, 4, 3, 3, 3, 2, 2
  58 };
  59
  60 #define WM8750_OUTVOL_TRANSFORM(x)      wm8750_vol_db_table[(0x7f - x) / 3]
  61 #define WM8750_INVOL_TRANSFORM(x)       (x << 2)
  62
  63 static inline void wm8750_in_load(WM8750State *s)
  64 {
  65     if (s->idx_in + s->req_in <= sizeof(s->data_in))
  66         return;
  67     s->idx_in = audio_MAX(0, (int) sizeof(s->data_in) - s->req_in);
  68     AUD_read(*s->in[0], s->data_in + s->idx_in,
  69              sizeof(s->data_in) - s->idx_in);
  70 }
  71
  72 static inline void wm8750_out_flush(WM8750State *s)
  73 {
  74     int sent = 0;
  75     while (sent < s->idx_out)
  76         sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
  77                 ?: s->idx_out;
  78     s->idx_out = 0;
  79 }
  80
  81 static void wm8750_audio_in_cb(void *opaque, int avail_b)
  82 {
  83     WM8750State *s = (WM8750State *) opaque;
  84     s->req_in = avail_b;
  85     s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
  86 }
  87
  88 static void wm8750_audio_out_cb(void *opaque, int free_b)
  89 {
  90     WM8750State *s = (WM8750State *) opaque;
  91
  92     if (s->idx_out >= free_b) {
  93         s->idx_out = free_b;
  94         s->req_out = 0;
  95         wm8750_out_flush(s);
  96     } else
  97         s->req_out = free_b - s->idx_out;
  98
  99     s->data_req(s->opaque, s->req_out >> 2, s->req_in >> 2);
 100 }
 101
 102 static const WMRate wm_rate_table[] = {
 103     {  256, 48000,  256, 48000 },       /* SR: 00000 */
 104     {  384, 48000,  384, 48000 },       /* SR: 00001 */
 105     {  256, 48000, 1536,  8000 },       /* SR: 00010 */
 106     {  384, 48000, 2304,  8000 },       /* SR: 00011 */
 107     { 1536,  8000,  256, 48000 },       /* SR: 00100 */
 108     { 2304,  8000,  384, 48000 },       /* SR: 00101 */
 109     { 1536,  8000, 1536,  8000 },       /* SR: 00110 */
 110     { 2304,  8000, 2304,  8000 },       /* SR: 00111 */
 111     { 1024, 12000, 1024, 12000 },       /* SR: 01000 */
 112     { 1526, 12000, 1536, 12000 },       /* SR: 01001 */
 113     {  768, 16000,  768, 16000 },       /* SR: 01010 */
 114     { 1152, 16000, 1152, 16000 },       /* SR: 01011 */
 115     {  384, 32000,  384, 32000 },       /* SR: 01100 */
 116     {  576, 32000,  576, 32000 },       /* SR: 01101 */
 117     {  128, 96000,  128, 96000 },       /* SR: 01110 */
 118     {  192, 96000,  192, 96000 },       /* SR: 01111 */
 119     {  256, 44100,  256, 44100 },       /* SR: 10000 */
 120     {  384, 44100,  384, 44100 },       /* SR: 10001 */
 121     {  256, 44100, 1408,  8018 },       /* SR: 10010 */
 122     {  384, 44100, 2112,  8018 },       /* SR: 10011 */
 123     { 1408,  8018,  256, 44100 },       /* SR: 10100 */
 124     { 2112,  8018,  384, 44100 },       /* SR: 10101 */
 125     { 1408,  8018, 1408,  8018 },       /* SR: 10110 */
 126     { 2112,  8018, 2112,  8018 },       /* SR: 10111 */
 127     { 1024, 11025, 1024, 11025 },       /* SR: 11000 */
 128     { 1536, 11025, 1536, 11025 },       /* SR: 11001 */
 129     {  512, 22050,  512, 22050 },       /* SR: 11010 */
 130     {  768, 22050,  768, 22050 },       /* SR: 11011 */
 131     {  512, 24000,  512, 24000 },       /* SR: 11100 */
 132     {  768, 24000,  768, 24000 },       /* SR: 11101 */
 133     {  128, 88200,  128, 88200 },       /* SR: 11110 */
 134     {  192, 88200,  192, 88200 },       /* SR: 11111 */
 135 };
 136
 137 static void wm8750_vol_update(WM8750State *s)
 138 {
 139     /* FIXME: multiply all volumes by s->invol[2], s->invol[3] */
 140
 141     AUD_set_volume_in(s->adc_voice[0], s->mute,
 142                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 143                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 144     AUD_set_volume_in(s->adc_voice[1], s->mute,
 145                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 146                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 147     AUD_set_volume_in(s->adc_voice[2], s->mute,
 148                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 149                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 150
 151     /* FIXME: multiply all volumes by s->outvol[0], s->outvol[1] */
 152
 153     /* Speaker: LOUT2VOL ROUT2VOL */
 154     AUD_set_volume_out(s->dac_voice[0], s->mute,
 155                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
 156                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
 157
 158     /* Headphone: LOUT1VOL ROUT1VOL */
 159     AUD_set_volume_out(s->dac_voice[1], s->mute,
 160                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[2]),
 161                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[3]));
 162
 163     /* MONOOUT: MONOVOL MONOVOL */
 164     AUD_set_volume_out(s->dac_voice[2], s->mute,
 165                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
 166                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]));
 167 }
 168
 169 static void wm8750_set_format(WM8750State *s)
 170 {
 171     int i;
 172     struct audsettings in_fmt;
 173     struct audsettings out_fmt;
 174
 175     wm8750_out_flush(s);
 176
 177     if (s->in[0] && *s->in[0])
 178         AUD_set_active_in(*s->in[0], 0);
 179     if (s->out[0] && *s->out[0])
 180         AUD_set_active_out(*s->out[0], 0);
 181
 182     for (i = 0; i < IN_PORT_N; i ++)
 183         if (s->adc_voice[i]) {
 184             AUD_close_in(&s->card, s->adc_voice[i]);
 185             s->adc_voice[i] = NULL;
 186         }
 187     for (i = 0; i < OUT_PORT_N; i ++)
 188         if (s->dac_voice[i]) {
 189             AUD_close_out(&s->card, s->dac_voice[i]);
 190             s->dac_voice[i] = NULL;
 191         }
 192
 193     if (!s->enable)
 194         return;
 195
 196     /* Setup input */
 197     in_fmt.endianness = 0;
 198     in_fmt.nchannels = 2;
 199     in_fmt.freq = s->adc_hz;
 200     in_fmt.fmt = AUD_FMT_S16;
 201
 202     s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
 203                     CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
 204     s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
 205                     CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
 206     s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
 207                     CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
 208
 209     /* Setup output */
 210     out_fmt.endianness = 0;
 211     out_fmt.nchannels = 2;
 212     out_fmt.freq = s->dac_hz;
 213     out_fmt.fmt = AUD_FMT_S16;
 214
 215     s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
 216                     CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
 217     s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
 218                     CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
 219     /* MONOMIX is also in stereo for simplicity */
 220     s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
 221                     CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
 222     /* no sense emulating OUT3 which is a mix of other outputs */
 223
 224     wm8750_vol_update(s);
 225
 226     /* We should connect the left and right channels to their
 227      * respective inputs/outputs but we have completely no need
 228      * for mixing or combining paths to different ports, so we
 229      * connect both channels to where the left channel is routed.  */
 230     if (s->in[0] && *s->in[0])
 231         AUD_set_active_in(*s->in[0], 1);
 232     if (s->out[0] && *s->out[0])
 233         AUD_set_active_out(*s->out[0], 1);
 234 }
 235
 236 static void wm8750_clk_update(WM8750State *s, int ext)
 237 {
 238     if (s->master || !s->ext_dac_hz)
 239         s->dac_hz = s->rate->dac_hz;
 240     else
 241         s->dac_hz = s->ext_dac_hz;
 242
 243     if (s->master || !s->ext_adc_hz)
 244         s->adc_hz = s->rate->adc_hz;
 245     else
 246         s->adc_hz = s->ext_adc_hz;
 247
 248     if (s->master || (!s->ext_dac_hz && !s->ext_adc_hz)) {
 249         if (!ext)
 250             wm8750_set_format(s);
 251     } else {
 252         if (ext)
 253             wm8750_set_format(s);
 254     }
 255 }
 256
 257 static void wm8750_reset(I2CSlave *i2c)
 258 {
 259     WM8750State *s = (WM8750State *) i2c;
 260     s->rate = &wm_rate_table[0];
 261     s->enable = 0;
 262     wm8750_clk_update(s, 1);
 263     s->diff[0] = 0;
 264     s->diff[1] = 0;
 265     s->ds = 0;
 266     s->alc = 0;
 267     s->in[0] = &s->adc_voice[0];
 268     s->invol[0] = 0x17;
 269     s->invol[1] = 0x17;
 270     s->invol[2] = 0xc3;
 271     s->invol[3] = 0xc3;
 272     s->out[0] = &s->dac_voice[0];
 273     s->outvol[0] = 0xff;
 274     s->outvol[1] = 0xff;
 275     s->outvol[2] = 0x79;
 276     s->outvol[3] = 0x79;
 277     s->outvol[4] = 0x79;
 278     s->outvol[5] = 0x79;
 279     s->outvol[6] = 0x79;
 280     s->inmute[0] = 0;
 281     s->inmute[1] = 0;
 282     s->outmute[0] = 0;
 283     s->outmute[1] = 0;
 284     s->mute = 1;
 285     s->path[0] = 0;
 286     s->path[1] = 0;
 287     s->path[2] = 0;
 288     s->path[3] = 0;
 289     s->mpath[0] = 0;
 290     s->mpath[1] = 0;
 291     s->format = 0x0a;
 292     s->idx_in = sizeof(s->data_in);
 293     s->req_in = 0;
 294     s->idx_out = 0;
 295     s->req_out = 0;
 296     wm8750_vol_update(s);
 297     s->i2c_len = 0;
 298 }
 299
 300 static void wm8750_event(I2CSlave *i2c, enum i2c_event event)
 301 {
 302     WM8750State *s = (WM8750State *) i2c;
 303
 304     switch (event) {
 305     case I2C_START_SEND:
 306         s->i2c_len = 0;
 307         break;
 308     case I2C_FINISH:
 309 #ifdef VERBOSE
 310         if (s->i2c_len < 2)
 311             printf("%s: message too short (%i bytes)\n",
 312                             __FUNCTION__, s->i2c_len);
 313 #endif
 314         break;
 315     default:
 316         break;
 317     }
 318 }
 319
 320 #define WM8750_LINVOL   0x00
 321 #define WM8750_RINVOL   0x01
 322 #define WM8750_LOUT1V   0x02
 323 #define WM8750_ROUT1V   0x03
 324 #define WM8750_ADCDAC   0x05
 325 #define WM8750_IFACE    0x07
 326 #define WM8750_SRATE    0x08
 327 #define WM8750_LDAC     0x0a
 328 #define WM8750_RDAC     0x0b
 329 #define WM8750_BASS     0x0c
 330 #define WM8750_TREBLE   0x0d
 331 #define WM8750_RESET    0x0f
 332 #define WM8750_3D       0x10
 333 #define WM8750_ALC1     0x11
 334 #define WM8750_ALC2     0x12
 335 #define WM8750_ALC3     0x13
 336 #define WM8750_NGATE    0x14
 337 #define WM8750_LADC     0x15
 338 #define WM8750_RADC     0x16
 339 #define WM8750_ADCTL1   0x17
 340 #define WM8750_ADCTL2   0x18
 341 #define WM8750_PWR1     0x19
 342 #define WM8750_PWR2     0x1a
 343 #define WM8750_ADCTL3   0x1b
 344 #define WM8750_ADCIN    0x1f
 345 #define WM8750_LADCIN   0x20
 346 #define WM8750_RADCIN   0x21
 347 #define WM8750_LOUTM1   0x22
 348 #define WM8750_LOUTM2   0x23
 349 #define WM8750_ROUTM1   0x24
 350 #define WM8750_ROUTM2   0x25
 351 #define WM8750_MOUTM1   0x26
 352 #define WM8750_MOUTM2   0x27
 353 #define WM8750_LOUT2V   0x28
 354 #define WM8750_ROUT2V   0x29
 355 #define WM8750_MOUTV    0x2a
 356
 357 static int wm8750_tx(I2CSlave *i2c, uint8_t data)
 358 {
 359     WM8750State *s = (WM8750State *) i2c;
 360     uint8_t cmd;
 361     uint16_t value;
 362
 363     if (s->i2c_len >= 2) {
 364 #ifdef VERBOSE
 365         printf("%s: long message (%i bytes)\n", __func__, s->i2c_len);
 366 #endif
 367         return 1;
 368     }
 369     s->i2c_data[s->i2c_len ++] = data;
 370     if (s->i2c_len != 2)
 371         return 0;
 372
 373     cmd = s->i2c_data[0] >> 1;
 374     value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
 375
 376     switch (cmd) {
 377     case WM8750_LADCIN: /* ADC Signal Path Control (Left) */
 378         s->diff[0] = (((value >> 6) & 3) == 3); /* LINSEL */
 379         if (s->diff[0])
 380             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 381         else
 382             s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 383         break;
 384
 385     case WM8750_RADCIN: /* ADC Signal Path Control (Right) */
 386         s->diff[1] = (((value >> 6) & 3) == 3); /* RINSEL */
 387         if (s->diff[1])
 388             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 389         else
 390             s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 391         break;
 392
 393     case WM8750_ADCIN:  /* ADC Input Mode */
 394         s->ds = (value >> 8) & 1;       /* DS */
 395         if (s->diff[0])
 396             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 397         if (s->diff[1])
 398             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 399         s->monomix[0] = (value >> 6) & 3;       /* MONOMIX */
 400         break;
 401
 402     case WM8750_ADCTL1: /* Additional Control (1) */
 403         s->monomix[1] = (value >> 1) & 1;       /* DMONOMIX */
 404         break;
 405
 406     case WM8750_PWR1:   /* Power Management (1) */
 407         s->enable = ((value >> 6) & 7) == 3;    /* VMIDSEL, VREF */
 408         wm8750_set_format(s);
 409         break;
 410
 411     case WM8750_LINVOL: /* Left Channel PGA */
 412         s->invol[0] = value & 0x3f;             /* LINVOL */
 413         s->inmute[0] = (value >> 7) & 1;        /* LINMUTE */
 414         wm8750_vol_update(s);
 415         break;
 416
 417     case WM8750_RINVOL: /* Right Channel PGA */
 418         s->invol[1] = value & 0x3f;             /* RINVOL */
 419         s->inmute[1] = (value >> 7) & 1;        /* RINMUTE */
 420         wm8750_vol_update(s);
 421         break;
 422
 423     case WM8750_ADCDAC: /* ADC and DAC Control */
 424         s->pol = (value >> 5) & 3;              /* ADCPOL */
 425         s->mute = (value >> 3) & 1;             /* DACMU */
 426         wm8750_vol_update(s);
 427         break;
 428
 429     case WM8750_ADCTL3: /* Additional Control (3) */
 430         break;
 431
 432     case WM8750_LADC:   /* Left ADC Digital Volume */
 433         s->invol[2] = value & 0xff;             /* LADCVOL */
 434         wm8750_vol_update(s);
 435         break;
 436
 437     case WM8750_RADC:   /* Right ADC Digital Volume */
 438         s->invol[3] = value & 0xff;             /* RADCVOL */
 439         wm8750_vol_update(s);
 440         break;
 441
 442     case WM8750_ALC1:   /* ALC Control (1) */
 443         s->alc = (value >> 7) & 3;              /* ALCSEL */
 444         break;
 445
 446     case WM8750_NGATE:  /* Noise Gate Control */
 447     case WM8750_3D:     /* 3D enhance */
 448         break;
 449
 450     case WM8750_LDAC:   /* Left Channel Digital Volume */
 451         s->outvol[0] = value & 0xff;            /* LDACVOL */
 452         wm8750_vol_update(s);
 453         break;
 454
 455     case WM8750_RDAC:   /* Right Channel Digital Volume */
 456         s->outvol[1] = value & 0xff;            /* RDACVOL */
 457         wm8750_vol_update(s);
 458         break;
 459
 460     case WM8750_BASS:   /* Bass Control */
 461         break;
 462
 463     case WM8750_LOUTM1: /* Left Mixer Control (1) */
 464         s->path[0] = (value >> 8) & 1;          /* LD2LO */
 465         /* TODO: mute/unmute respective paths */
 466         wm8750_vol_update(s);
 467         break;
 468
 469     case WM8750_LOUTM2: /* Left Mixer Control (2) */
 470         s->path[1] = (value >> 8) & 1;          /* RD2LO */
 471         /* TODO: mute/unmute respective paths */
 472         wm8750_vol_update(s);
 473         break;
 474
 475     case WM8750_ROUTM1: /* Right Mixer Control (1) */
 476         s->path[2] = (value >> 8) & 1;          /* LD2RO */
 477         /* TODO: mute/unmute respective paths */
 478         wm8750_vol_update(s);
 479         break;
 480
 481     case WM8750_ROUTM2: /* Right Mixer Control (2) */
 482         s->path[3] = (value >> 8) & 1;          /* RD2RO */
 483         /* TODO: mute/unmute respective paths */
 484         wm8750_vol_update(s);
 485         break;
 486
 487     case WM8750_MOUTM1: /* Mono Mixer Control (1) */
 488         s->mpath[0] = (value >> 8) & 1;         /* LD2MO */
 489         /* TODO: mute/unmute respective paths */
 490         wm8750_vol_update(s);
 491         break;
 492
 493     case WM8750_MOUTM2: /* Mono Mixer Control (2) */
 494         s->mpath[1] = (value >> 8) & 1;         /* RD2MO */
 495         /* TODO: mute/unmute respective paths */
 496         wm8750_vol_update(s);
 497         break;
 498
 499     case WM8750_LOUT1V: /* LOUT1 Volume */
 500         s->outvol[2] = value & 0x7f;            /* LOUT1VOL */
 501         wm8750_vol_update(s);
 502         break;
 503
 504     case WM8750_LOUT2V: /* LOUT2 Volume */
 505         s->outvol[4] = value & 0x7f;            /* LOUT2VOL */
 506         wm8750_vol_update(s);
 507         break;
 508
 509     case WM8750_ROUT1V: /* ROUT1 Volume */
 510         s->outvol[3] = value & 0x7f;            /* ROUT1VOL */
 511         wm8750_vol_update(s);
 512         break;
 513
 514     case WM8750_ROUT2V: /* ROUT2 Volume */
 515         s->outvol[5] = value & 0x7f;            /* ROUT2VOL */
 516         wm8750_vol_update(s);
 517         break;
 518
 519     case WM8750_MOUTV:  /* MONOOUT Volume */
 520         s->outvol[6] = value & 0x7f;            /* MONOOUTVOL */
 521         wm8750_vol_update(s);
 522         break;
 523
 524     case WM8750_ADCTL2: /* Additional Control (2) */
 525         break;
 526
 527     case WM8750_PWR2:   /* Power Management (2) */
 528         s->power = value & 0x7e;
 529         /* TODO: mute/unmute respective paths */
 530         wm8750_vol_update(s);
 531         break;
 532
 533     case WM8750_IFACE:  /* Digital Audio Interface Format */
 534         s->format = value;
 535         s->master = (value >> 6) & 1;                   /* MS */
 536         wm8750_clk_update(s, s->master);
 537         break;
 538
 539     case WM8750_SRATE:  /* Clocking and Sample Rate Control */
 540         s->rate = &wm_rate_table[(value >> 1) & 0x1f];
 541         wm8750_clk_update(s, 0);
 542         break;
 543
 544     case WM8750_RESET:  /* Reset */
 545         wm8750_reset(&s->i2c);
 546         break;
 547
 548 #ifdef VERBOSE
 549     default:
 550         printf("%s: unknown register %02x\n", __FUNCTION__, cmd);
 551 #endif
 552     }
 553
 554     return 0;
 555 }
 556
 557 static int wm8750_rx(I2CSlave *i2c)
 558 {
 559     return 0x00;
 560 }
 561
 562 static void wm8750_pre_save(void *opaque)
 563 {
 564     WM8750State *s = opaque;
 565
 566     s->rate_vmstate = s->rate - wm_rate_table;
 567 }
 568
 569 static int wm8750_post_load(void *opaque, int version_id)
 570 {
 571     WM8750State *s = opaque;
 572
 573     s->rate = &wm_rate_table[s->rate_vmstate & 0x1f];
 574     return 0;
 575 }
 576
 577 static const VMStateDescription vmstate_wm8750 = {
 578     .name = CODEC,
 579     .version_id = 0,
 580     .minimum_version_id = 0,
 581     .minimum_version_id_old = 0,
 582     .pre_save = wm8750_pre_save,
 583     .post_load = wm8750_post_load,
 584     .fields      = (VMStateField []) {
 585         VMSTATE_UINT8_ARRAY(i2c_data, WM8750State, 2),
 586         VMSTATE_INT32(i2c_len, WM8750State),
 587         VMSTATE_INT32(enable, WM8750State),
 588         VMSTATE_INT32(idx_in, WM8750State),
 589         VMSTATE_INT32(req_in, WM8750State),
 590         VMSTATE_INT32(idx_out, WM8750State),
 591         VMSTATE_INT32(req_out, WM8750State),
 592         VMSTATE_UINT8_ARRAY(outvol, WM8750State, 7),
 593         VMSTATE_UINT8_ARRAY(outmute, WM8750State, 2),
 594         VMSTATE_UINT8_ARRAY(invol, WM8750State, 4),
 595         VMSTATE_UINT8_ARRAY(inmute, WM8750State, 2),
 596         VMSTATE_UINT8_ARRAY(diff, WM8750State, 2),
 597         VMSTATE_UINT8(pol, WM8750State),
 598         VMSTATE_UINT8(ds, WM8750State),
 599         VMSTATE_UINT8_ARRAY(monomix, WM8750State, 2),
 600         VMSTATE_UINT8(alc, WM8750State),
 601         VMSTATE_UINT8(mute, WM8750State),
 602         VMSTATE_UINT8_ARRAY(path, WM8750State, 4),
 603         VMSTATE_UINT8_ARRAY(mpath, WM8750State, 2),
 604         VMSTATE_UINT8(format, WM8750State),
 605         VMSTATE_UINT8(power, WM8750State),
 606         VMSTATE_UINT8(rate_vmstate, WM8750State),
 607         VMSTATE_I2C_SLAVE(i2c, WM8750State),
 608         VMSTATE_END_OF_LIST()
 609     }
 610 };
 611
 612 static int wm8750_init(I2CSlave *i2c)
 613 {
 614     WM8750State *s = FROM_I2C_SLAVE(WM8750State, i2c);
 615
 616     AUD_register_card(CODEC, &s->card);
 617     wm8750_reset(&s->i2c);
 618
 619     return 0;
 620 }
 621
 622 #if 0
 623 static void wm8750_fini(I2CSlave *i2c)
 624 {
 625     WM8750State *s = (WM8750State *) i2c;
 626     wm8750_reset(&s->i2c);
 627     AUD_remove_card(&s->card);
 628     g_free(s);
 629 }
 630 #endif
 631
 632 void wm8750_data_req_set(DeviceState *dev,
 633                 void (*data_req)(void *, int, int), void *opaque)
 634 {
 635     WM8750State *s = FROM_I2C_SLAVE(WM8750State, I2C_SLAVE(dev));
 636     s->data_req = data_req;
 637     s->opaque = opaque;
 638 }
 639
 640 void wm8750_dac_dat(void *opaque, uint32_t sample)
 641 {
 642     WM8750State *s = (WM8750State *) opaque;
 643
 644     *(uint32_t *) &s->data_out[s->idx_out] = sample;
 645     s->req_out -= 4;
 646     s->idx_out += 4;
 647     if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
 648         wm8750_out_flush(s);
 649 }
 650
 651 void *wm8750_dac_buffer(void *opaque, int samples)
 652 {
 653     WM8750State *s = (WM8750State *) opaque;
 654     /* XXX: Should check if there are <i>samples</i> free samples available */
 655     void *ret = s->data_out + s->idx_out;
 656
 657     s->idx_out += samples << 2;
 658     s->req_out -= samples << 2;
 659     return ret;
 660 }
 661
 662 void wm8750_dac_commit(void *opaque)
 663 {
 664     WM8750State *s = (WM8750State *) opaque;
 665
 666     wm8750_out_flush(s);
 667 }
 668
 669 uint32_t wm8750_adc_dat(void *opaque)
 670 {
 671     WM8750State *s = (WM8750State *) opaque;
 672     uint32_t *data;
 673
 674     if (s->idx_in >= sizeof(s->data_in))
 675         wm8750_in_load(s);
 676
 677     data = (uint32_t *) &s->data_in[s->idx_in];
 678     s->req_in -= 4;
 679     s->idx_in += 4;
 680     return *data;
 681 }
 682
 683 void wm8750_set_bclk_in(void *opaque, int new_hz)
 684 {
 685     WM8750State *s = (WM8750State *) opaque;
 686
 687     s->ext_adc_hz = new_hz;
 688     s->ext_dac_hz = new_hz;
 689     wm8750_clk_update(s, 1);
 690 }
 691
 692 static void wm8750_class_init(ObjectClass *klass, void *data)
 693 {
 694     DeviceClass *dc = DEVICE_CLASS(klass);
 695     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 696
 697     sc->init = wm8750_init;
 698     sc->event = wm8750_event;
 699     sc->recv = wm8750_rx;
 700     sc->send = wm8750_tx;
 701     dc->vmsd = &vmstate_wm8750;
 702 }
 703
 704 static const TypeInfo wm8750_info = {
 705     .name          = "wm8750",
 706     .parent        = TYPE_I2C_SLAVE,
 707     .instance_size = sizeof(WM8750State),
 708     .class_init    = wm8750_class_init,
 709 };
 710
 711 static void wm8750_register_types(void)
 712 {
 713     type_register_static(&wm8750_info);
 714 }
 715
 716 type_init(wm8750_register_types)