hw/audio/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/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 #define TYPE_WM8750 "wm8750"
  27 #define WM8750(obj) OBJECT_CHECK(WM8750State, (obj), TYPE_WM8750)
  28
  29 typedef struct WM8750State {
  30     I2CSlave parent_obj;
  31
  32     uint8_t i2c_data[2];
  33     int i2c_len;
  34     QEMUSoundCard card;
  35     SWVoiceIn *adc_voice[IN_PORT_N];
  36     SWVoiceOut *dac_voice[OUT_PORT_N];
  37     int enable;
  38     void (*data_req)(void *, int, int);
  39     void *opaque;
  40     uint8_t data_in[4096];
  41     uint8_t data_out[4096];
  42     int idx_in, req_in;
  43     int idx_out, req_out;
  44
  45     SWVoiceOut **out[2];
  46     uint8_t outvol[7], outmute[2];
  47     SWVoiceIn **in[2];
  48     uint8_t invol[4], inmute[2];
  49
  50     uint8_t diff[2], pol, ds, monomix[2], alc, mute;
  51     uint8_t path[4], mpath[2], power, format;
  52     const WMRate *rate;
  53     uint8_t rate_vmstate;
  54     int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
  55 } WM8750State;
  56
  57 /* pow(10.0, -i / 20.0) * 255, i = 0..42 */
  58 static const uint8_t wm8750_vol_db_table[] = {
  59     255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
  60     40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
  61     4, 4, 3, 3, 3, 2, 2
  62 };
  63
  64 #define WM8750_OUTVOL_TRANSFORM(x)      wm8750_vol_db_table[(0x7f - x) / 3]
  65 #define WM8750_INVOL_TRANSFORM(x)       (x << 2)
  66
  67 static inline void wm8750_in_load(WM8750State *s)
  68 {
  69     if (s->idx_in + s->req_in <= sizeof(s->data_in))
  70         return;
  71     s->idx_in = audio_MAX(0, (int) sizeof(s->data_in) - s->req_in);
  72     AUD_read(*s->in[0], s->data_in + s->idx_in,
  73              sizeof(s->data_in) - s->idx_in);
  74 }
  75
  76 static inline void wm8750_out_flush(WM8750State *s)
  77 {
  78     int sent = 0;
  79     while (sent < s->idx_out)
  80         sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
  81                 ?: s->idx_out;
  82     s->idx_out = 0;
  83 }
  84
  85 static void wm8750_audio_in_cb(void *opaque, int avail_b)
  86 {
  87     WM8750State *s = (WM8750State *) opaque;
  88     s->req_in = avail_b;
  89     s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
  90 }
  91
  92 static void wm8750_audio_out_cb(void *opaque, int free_b)
  93 {
  94     WM8750State *s = (WM8750State *) opaque;
  95
  96     if (s->idx_out >= free_b) {
  97         s->idx_out = free_b;
  98         s->req_out = 0;
  99         wm8750_out_flush(s);
 100     } else
 101         s->req_out = free_b - s->idx_out;
 102
 103     s->data_req(s->opaque, s->req_out >> 2, s->req_in >> 2);
 104 }
 105
 106 static const WMRate wm_rate_table[] = {
 107     {  256, 48000,  256, 48000 },       /* SR: 00000 */
 108     {  384, 48000,  384, 48000 },       /* SR: 00001 */
 109     {  256, 48000, 1536,  8000 },       /* SR: 00010 */
 110     {  384, 48000, 2304,  8000 },       /* SR: 00011 */
 111     { 1536,  8000,  256, 48000 },       /* SR: 00100 */
 112     { 2304,  8000,  384, 48000 },       /* SR: 00101 */
 113     { 1536,  8000, 1536,  8000 },       /* SR: 00110 */
 114     { 2304,  8000, 2304,  8000 },       /* SR: 00111 */
 115     { 1024, 12000, 1024, 12000 },       /* SR: 01000 */
 116     { 1526, 12000, 1536, 12000 },       /* SR: 01001 */
 117     {  768, 16000,  768, 16000 },       /* SR: 01010 */
 118     { 1152, 16000, 1152, 16000 },       /* SR: 01011 */
 119     {  384, 32000,  384, 32000 },       /* SR: 01100 */
 120     {  576, 32000,  576, 32000 },       /* SR: 01101 */
 121     {  128, 96000,  128, 96000 },       /* SR: 01110 */
 122     {  192, 96000,  192, 96000 },       /* SR: 01111 */
 123     {  256, 44100,  256, 44100 },       /* SR: 10000 */
 124     {  384, 44100,  384, 44100 },       /* SR: 10001 */
 125     {  256, 44100, 1408,  8018 },       /* SR: 10010 */
 126     {  384, 44100, 2112,  8018 },       /* SR: 10011 */
 127     { 1408,  8018,  256, 44100 },       /* SR: 10100 */
 128     { 2112,  8018,  384, 44100 },       /* SR: 10101 */
 129     { 1408,  8018, 1408,  8018 },       /* SR: 10110 */
 130     { 2112,  8018, 2112,  8018 },       /* SR: 10111 */
 131     { 1024, 11025, 1024, 11025 },       /* SR: 11000 */
 132     { 1536, 11025, 1536, 11025 },       /* SR: 11001 */
 133     {  512, 22050,  512, 22050 },       /* SR: 11010 */
 134     {  768, 22050,  768, 22050 },       /* SR: 11011 */
 135     {  512, 24000,  512, 24000 },       /* SR: 11100 */
 136     {  768, 24000,  768, 24000 },       /* SR: 11101 */
 137     {  128, 88200,  128, 88200 },       /* SR: 11110 */
 138     {  192, 88200,  192, 88200 },       /* SR: 11111 */
 139 };
 140
 141 static void wm8750_vol_update(WM8750State *s)
 142 {
 143     /* FIXME: multiply all volumes by s->invol[2], s->invol[3] */
 144
 145     AUD_set_volume_in(s->adc_voice[0], 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[1], 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     AUD_set_volume_in(s->adc_voice[2], s->mute,
 152                     s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
 153                     s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
 154
 155     /* FIXME: multiply all volumes by s->outvol[0], s->outvol[1] */
 156
 157     /* Speaker: LOUT2VOL ROUT2VOL */
 158     AUD_set_volume_out(s->dac_voice[0], s->mute,
 159                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
 160                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
 161
 162     /* Headphone: LOUT1VOL ROUT1VOL */
 163     AUD_set_volume_out(s->dac_voice[1], s->mute,
 164                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[2]),
 165                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[3]));
 166
 167     /* MONOOUT: MONOVOL MONOVOL */
 168     AUD_set_volume_out(s->dac_voice[2], s->mute,
 169                     s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
 170                     s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]));
 171 }
 172
 173 static void wm8750_set_format(WM8750State *s)
 174 {
 175     int i;
 176     struct audsettings in_fmt;
 177     struct audsettings out_fmt;
 178
 179     wm8750_out_flush(s);
 180
 181     if (s->in[0] && *s->in[0])
 182         AUD_set_active_in(*s->in[0], 0);
 183     if (s->out[0] && *s->out[0])
 184         AUD_set_active_out(*s->out[0], 0);
 185
 186     for (i = 0; i < IN_PORT_N; i ++)
 187         if (s->adc_voice[i]) {
 188             AUD_close_in(&s->card, s->adc_voice[i]);
 189             s->adc_voice[i] = NULL;
 190         }
 191     for (i = 0; i < OUT_PORT_N; i ++)
 192         if (s->dac_voice[i]) {
 193             AUD_close_out(&s->card, s->dac_voice[i]);
 194             s->dac_voice[i] = NULL;
 195         }
 196
 197     if (!s->enable)
 198         return;
 199
 200     /* Setup input */
 201     in_fmt.endianness = 0;
 202     in_fmt.nchannels = 2;
 203     in_fmt.freq = s->adc_hz;
 204     in_fmt.fmt = AUD_FMT_S16;
 205
 206     s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
 207                     CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
 208     s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
 209                     CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
 210     s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
 211                     CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
 212
 213     /* Setup output */
 214     out_fmt.endianness = 0;
 215     out_fmt.nchannels = 2;
 216     out_fmt.freq = s->dac_hz;
 217     out_fmt.fmt = AUD_FMT_S16;
 218
 219     s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
 220                     CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
 221     s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
 222                     CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
 223     /* MONOMIX is also in stereo for simplicity */
 224     s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
 225                     CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
 226     /* no sense emulating OUT3 which is a mix of other outputs */
 227
 228     wm8750_vol_update(s);
 229
 230     /* We should connect the left and right channels to their
 231      * respective inputs/outputs but we have completely no need
 232      * for mixing or combining paths to different ports, so we
 233      * connect both channels to where the left channel is routed.  */
 234     if (s->in[0] && *s->in[0])
 235         AUD_set_active_in(*s->in[0], 1);
 236     if (s->out[0] && *s->out[0])
 237         AUD_set_active_out(*s->out[0], 1);
 238 }
 239
 240 static void wm8750_clk_update(WM8750State *s, int ext)
 241 {
 242     if (s->master || !s->ext_dac_hz)
 243         s->dac_hz = s->rate->dac_hz;
 244     else
 245         s->dac_hz = s->ext_dac_hz;
 246
 247     if (s->master || !s->ext_adc_hz)
 248         s->adc_hz = s->rate->adc_hz;
 249     else
 250         s->adc_hz = s->ext_adc_hz;
 251
 252     if (s->master || (!s->ext_dac_hz && !s->ext_adc_hz)) {
 253         if (!ext)
 254             wm8750_set_format(s);
 255     } else {
 256         if (ext)
 257             wm8750_set_format(s);
 258     }
 259 }
 260
 261 static void wm8750_reset(I2CSlave *i2c)
 262 {
 263     WM8750State *s = WM8750(i2c);
 264
 265     s->rate = &wm_rate_table[0];
 266     s->enable = 0;
 267     wm8750_clk_update(s, 1);
 268     s->diff[0] = 0;
 269     s->diff[1] = 0;
 270     s->ds = 0;
 271     s->alc = 0;
 272     s->in[0] = &s->adc_voice[0];
 273     s->invol[0] = 0x17;
 274     s->invol[1] = 0x17;
 275     s->invol[2] = 0xc3;
 276     s->invol[3] = 0xc3;
 277     s->out[0] = &s->dac_voice[0];
 278     s->outvol[0] = 0xff;
 279     s->outvol[1] = 0xff;
 280     s->outvol[2] = 0x79;
 281     s->outvol[3] = 0x79;
 282     s->outvol[4] = 0x79;
 283     s->outvol[5] = 0x79;
 284     s->outvol[6] = 0x79;
 285     s->inmute[0] = 0;
 286     s->inmute[1] = 0;
 287     s->outmute[0] = 0;
 288     s->outmute[1] = 0;
 289     s->mute = 1;
 290     s->path[0] = 0;
 291     s->path[1] = 0;
 292     s->path[2] = 0;
 293     s->path[3] = 0;
 294     s->mpath[0] = 0;
 295     s->mpath[1] = 0;
 296     s->format = 0x0a;
 297     s->idx_in = sizeof(s->data_in);
 298     s->req_in = 0;
 299     s->idx_out = 0;
 300     s->req_out = 0;
 301     wm8750_vol_update(s);
 302     s->i2c_len = 0;
 303 }
 304
 305 static void wm8750_event(I2CSlave *i2c, enum i2c_event event)
 306 {
 307     WM8750State *s = WM8750(i2c);
 308
 309     switch (event) {
 310     case I2C_START_SEND:
 311         s->i2c_len = 0;
 312         break;
 313     case I2C_FINISH:
 314 #ifdef VERBOSE
 315         if (s->i2c_len < 2)
 316             printf("%s: message too short (%i bytes)\n",
 317                             __FUNCTION__, s->i2c_len);
 318 #endif
 319         break;
 320     default:
 321         break;
 322     }
 323 }
 324
 325 #define WM8750_LINVOL   0x00
 326 #define WM8750_RINVOL   0x01
 327 #define WM8750_LOUT1V   0x02
 328 #define WM8750_ROUT1V   0x03
 329 #define WM8750_ADCDAC   0x05
 330 #define WM8750_IFACE    0x07
 331 #define WM8750_SRATE    0x08
 332 #define WM8750_LDAC     0x0a
 333 #define WM8750_RDAC     0x0b
 334 #define WM8750_BASS     0x0c
 335 #define WM8750_TREBLE   0x0d
 336 #define WM8750_RESET    0x0f
 337 #define WM8750_3D       0x10
 338 #define WM8750_ALC1     0x11
 339 #define WM8750_ALC2     0x12
 340 #define WM8750_ALC3     0x13
 341 #define WM8750_NGATE    0x14
 342 #define WM8750_LADC     0x15
 343 #define WM8750_RADC     0x16
 344 #define WM8750_ADCTL1   0x17
 345 #define WM8750_ADCTL2   0x18
 346 #define WM8750_PWR1     0x19
 347 #define WM8750_PWR2     0x1a
 348 #define WM8750_ADCTL3   0x1b
 349 #define WM8750_ADCIN    0x1f
 350 #define WM8750_LADCIN   0x20
 351 #define WM8750_RADCIN   0x21
 352 #define WM8750_LOUTM1   0x22
 353 #define WM8750_LOUTM2   0x23
 354 #define WM8750_ROUTM1   0x24
 355 #define WM8750_ROUTM2   0x25
 356 #define WM8750_MOUTM1   0x26
 357 #define WM8750_MOUTM2   0x27
 358 #define WM8750_LOUT2V   0x28
 359 #define WM8750_ROUT2V   0x29
 360 #define WM8750_MOUTV    0x2a
 361
 362 static int wm8750_tx(I2CSlave *i2c, uint8_t data)
 363 {
 364     WM8750State *s = WM8750(i2c);
 365     uint8_t cmd;
 366     uint16_t value;
 367
 368     if (s->i2c_len >= 2) {
 369 #ifdef VERBOSE
 370         printf("%s: long message (%i bytes)\n", __func__, s->i2c_len);
 371 #endif
 372         return 1;
 373     }
 374     s->i2c_data[s->i2c_len ++] = data;
 375     if (s->i2c_len != 2)
 376         return 0;
 377
 378     cmd = s->i2c_data[0] >> 1;
 379     value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
 380
 381     switch (cmd) {
 382     case WM8750_LADCIN: /* ADC Signal Path Control (Left) */
 383         s->diff[0] = (((value >> 6) & 3) == 3); /* LINSEL */
 384         if (s->diff[0])
 385             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 386         else
 387             s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 388         break;
 389
 390     case WM8750_RADCIN: /* ADC Signal Path Control (Right) */
 391         s->diff[1] = (((value >> 6) & 3) == 3); /* RINSEL */
 392         if (s->diff[1])
 393             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 394         else
 395             s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
 396         break;
 397
 398     case WM8750_ADCIN:  /* ADC Input Mode */
 399         s->ds = (value >> 8) & 1;       /* DS */
 400         if (s->diff[0])
 401             s->in[0] = &s->adc_voice[0 + s->ds * 1];
 402         if (s->diff[1])
 403             s->in[1] = &s->adc_voice[0 + s->ds * 1];
 404         s->monomix[0] = (value >> 6) & 3;       /* MONOMIX */
 405         break;
 406
 407     case WM8750_ADCTL1: /* Additional Control (1) */
 408         s->monomix[1] = (value >> 1) & 1;       /* DMONOMIX */
 409         break;
 410
 411     case WM8750_PWR1:   /* Power Management (1) */
 412         s->enable = ((value >> 6) & 7) == 3;    /* VMIDSEL, VREF */
 413         wm8750_set_format(s);
 414         break;
 415
 416     case WM8750_LINVOL: /* Left Channel PGA */
 417         s->invol[0] = value & 0x3f;             /* LINVOL */
 418         s->inmute[0] = (value >> 7) & 1;        /* LINMUTE */
 419         wm8750_vol_update(s);
 420         break;
 421
 422     case WM8750_RINVOL: /* Right Channel PGA */
 423         s->invol[1] = value & 0x3f;             /* RINVOL */
 424         s->inmute[1] = (value >> 7) & 1;        /* RINMUTE */
 425         wm8750_vol_update(s);
 426         break;
 427
 428     case WM8750_ADCDAC: /* ADC and DAC Control */
 429         s->pol = (value >> 5) & 3;              /* ADCPOL */
 430         s->mute = (value >> 3) & 1;             /* DACMU */
 431         wm8750_vol_update(s);
 432         break;
 433
 434     case WM8750_ADCTL3: /* Additional Control (3) */
 435         break;
 436
 437     case WM8750_LADC:   /* Left ADC Digital Volume */
 438         s->invol[2] = value & 0xff;             /* LADCVOL */
 439         wm8750_vol_update(s);
 440         break;
 441
 442     case WM8750_RADC:   /* Right ADC Digital Volume */
 443         s->invol[3] = value & 0xff;             /* RADCVOL */
 444         wm8750_vol_update(s);
 445         break;
 446
 447     case WM8750_ALC1:   /* ALC Control (1) */
 448         s->alc = (value >> 7) & 3;              /* ALCSEL */
 449         break;
 450
 451     case WM8750_NGATE:  /* Noise Gate Control */
 452     case WM8750_3D:     /* 3D enhance */
 453         break;
 454
 455     case WM8750_LDAC:   /* Left Channel Digital Volume */
 456         s->outvol[0] = value & 0xff;            /* LDACVOL */
 457         wm8750_vol_update(s);
 458         break;
 459
 460     case WM8750_RDAC:   /* Right Channel Digital Volume */
 461         s->outvol[1] = value & 0xff;            /* RDACVOL */
 462         wm8750_vol_update(s);
 463         break;
 464
 465     case WM8750_BASS:   /* Bass Control */
 466         break;
 467
 468     case WM8750_LOUTM1: /* Left Mixer Control (1) */
 469         s->path[0] = (value >> 8) & 1;          /* LD2LO */
 470         /* TODO: mute/unmute respective paths */
 471         wm8750_vol_update(s);
 472         break;
 473
 474     case WM8750_LOUTM2: /* Left Mixer Control (2) */
 475         s->path[1] = (value >> 8) & 1;          /* RD2LO */
 476         /* TODO: mute/unmute respective paths */
 477         wm8750_vol_update(s);
 478         break;
 479
 480     case WM8750_ROUTM1: /* Right Mixer Control (1) */
 481         s->path[2] = (value >> 8) & 1;          /* LD2RO */
 482         /* TODO: mute/unmute respective paths */
 483         wm8750_vol_update(s);
 484         break;
 485
 486     case WM8750_ROUTM2: /* Right Mixer Control (2) */
 487         s->path[3] = (value >> 8) & 1;          /* RD2RO */
 488         /* TODO: mute/unmute respective paths */
 489         wm8750_vol_update(s);
 490         break;
 491
 492     case WM8750_MOUTM1: /* Mono Mixer Control (1) */
 493         s->mpath[0] = (value >> 8) & 1;         /* LD2MO */
 494         /* TODO: mute/unmute respective paths */
 495         wm8750_vol_update(s);
 496         break;
 497
 498     case WM8750_MOUTM2: /* Mono Mixer Control (2) */
 499         s->mpath[1] = (value >> 8) & 1;         /* RD2MO */
 500         /* TODO: mute/unmute respective paths */
 501         wm8750_vol_update(s);
 502         break;
 503
 504     case WM8750_LOUT1V: /* LOUT1 Volume */
 505         s->outvol[2] = value & 0x7f;            /* LOUT1VOL */
 506         wm8750_vol_update(s);
 507         break;
 508
 509     case WM8750_LOUT2V: /* LOUT2 Volume */
 510         s->outvol[4] = value & 0x7f;            /* LOUT2VOL */
 511         wm8750_vol_update(s);
 512         break;
 513
 514     case WM8750_ROUT1V: /* ROUT1 Volume */
 515         s->outvol[3] = value & 0x7f;            /* ROUT1VOL */
 516         wm8750_vol_update(s);
 517         break;
 518
 519     case WM8750_ROUT2V: /* ROUT2 Volume */
 520         s->outvol[5] = value & 0x7f;            /* ROUT2VOL */
 521         wm8750_vol_update(s);
 522         break;
 523
 524     case WM8750_MOUTV:  /* MONOOUT Volume */
 525         s->outvol[6] = value & 0x7f;            /* MONOOUTVOL */
 526         wm8750_vol_update(s);
 527         break;
 528
 529     case WM8750_ADCTL2: /* Additional Control (2) */
 530         break;
 531
 532     case WM8750_PWR2:   /* Power Management (2) */
 533         s->power = value & 0x7e;
 534         /* TODO: mute/unmute respective paths */
 535         wm8750_vol_update(s);
 536         break;
 537
 538     case WM8750_IFACE:  /* Digital Audio Interface Format */
 539         s->format = value;
 540         s->master = (value >> 6) & 1;                   /* MS */
 541         wm8750_clk_update(s, s->master);
 542         break;
 543
 544     case WM8750_SRATE:  /* Clocking and Sample Rate Control */
 545         s->rate = &wm_rate_table[(value >> 1) & 0x1f];
 546         wm8750_clk_update(s, 0);
 547         break;
 548
 549     case WM8750_RESET:  /* Reset */
 550         wm8750_reset(I2C_SLAVE(s));
 551         break;
 552
 553 #ifdef VERBOSE
 554     default:
 555         printf("%s: unknown register %02x\n", __FUNCTION__, cmd);
 556 #endif
 557     }
 558
 559     return 0;
 560 }
 561
 562 static int wm8750_rx(I2CSlave *i2c)
 563 {
 564     return 0x00;
 565 }
 566
 567 static void wm8750_pre_save(void *opaque)
 568 {
 569     WM8750State *s = opaque;
 570
 571     s->rate_vmstate = s->rate - wm_rate_table;
 572 }
 573
 574 static int wm8750_post_load(void *opaque, int version_id)
 575 {
 576     WM8750State *s = opaque;
 577
 578     s->rate = &wm_rate_table[s->rate_vmstate & 0x1f];
 579     return 0;
 580 }
 581
 582 static const VMStateDescription vmstate_wm8750 = {
 583     .name = CODEC,
 584     .version_id = 0,
 585     .minimum_version_id = 0,
 586     .pre_save = wm8750_pre_save,
 587     .post_load = wm8750_post_load,
 588     .fields = (VMStateField[]) {
 589         VMSTATE_UINT8_ARRAY(i2c_data, WM8750State, 2),
 590         VMSTATE_INT32(i2c_len, WM8750State),
 591         VMSTATE_INT32(enable, WM8750State),
 592         VMSTATE_INT32(idx_in, WM8750State),
 593         VMSTATE_INT32(req_in, WM8750State),
 594         VMSTATE_INT32(idx_out, WM8750State),
 595         VMSTATE_INT32(req_out, WM8750State),
 596         VMSTATE_UINT8_ARRAY(outvol, WM8750State, 7),
 597         VMSTATE_UINT8_ARRAY(outmute, WM8750State, 2),
 598         VMSTATE_UINT8_ARRAY(invol, WM8750State, 4),
 599         VMSTATE_UINT8_ARRAY(inmute, WM8750State, 2),
 600         VMSTATE_UINT8_ARRAY(diff, WM8750State, 2),
 601         VMSTATE_UINT8(pol, WM8750State),
 602         VMSTATE_UINT8(ds, WM8750State),
 603         VMSTATE_UINT8_ARRAY(monomix, WM8750State, 2),
 604         VMSTATE_UINT8(alc, WM8750State),
 605         VMSTATE_UINT8(mute, WM8750State),
 606         VMSTATE_UINT8_ARRAY(path, WM8750State, 4),
 607         VMSTATE_UINT8_ARRAY(mpath, WM8750State, 2),
 608         VMSTATE_UINT8(format, WM8750State),
 609         VMSTATE_UINT8(power, WM8750State),
 610         VMSTATE_UINT8(rate_vmstate, WM8750State),
 611         VMSTATE_I2C_SLAVE(parent_obj, WM8750State),
 612         VMSTATE_END_OF_LIST()
 613     }
 614 };
 615
 616 static int wm8750_init(I2CSlave *i2c)
 617 {
 618     WM8750State *s = WM8750(i2c);
 619
 620     AUD_register_card(CODEC, &s->card);
 621     wm8750_reset(I2C_SLAVE(s));
 622
 623     return 0;
 624 }
 625
 626 #if 0
 627 static void wm8750_fini(I2CSlave *i2c)
 628 {
 629     WM8750State *s = WM8750(i2c);
 630
 631     wm8750_reset(I2C_SLAVE(s));
 632     AUD_remove_card(&s->card);
 633     g_free(s);
 634 }
 635 #endif
 636
 637 void wm8750_data_req_set(DeviceState *dev,
 638                 void (*data_req)(void *, int, int), void *opaque)
 639 {
 640     WM8750State *s = WM8750(dev);
 641
 642     s->data_req = data_req;
 643     s->opaque = opaque;
 644 }
 645
 646 void wm8750_dac_dat(void *opaque, uint32_t sample)
 647 {
 648     WM8750State *s = (WM8750State *) opaque;
 649
 650     *(uint32_t *) &s->data_out[s->idx_out] = sample;
 651     s->req_out -= 4;
 652     s->idx_out += 4;
 653     if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
 654         wm8750_out_flush(s);
 655 }
 656
 657 void *wm8750_dac_buffer(void *opaque, int samples)
 658 {
 659     WM8750State *s = (WM8750State *) opaque;
 660     /* XXX: Should check if there are <i>samples</i> free samples available */
 661     void *ret = s->data_out + s->idx_out;
 662
 663     s->idx_out += samples << 2;
 664     s->req_out -= samples << 2;
 665     return ret;
 666 }
 667
 668 void wm8750_dac_commit(void *opaque)
 669 {
 670     WM8750State *s = (WM8750State *) opaque;
 671
 672     wm8750_out_flush(s);
 673 }
 674
 675 uint32_t wm8750_adc_dat(void *opaque)
 676 {
 677     WM8750State *s = (WM8750State *) opaque;
 678     uint32_t *data;
 679
 680     if (s->idx_in >= sizeof(s->data_in))
 681         wm8750_in_load(s);
 682
 683     data = (uint32_t *) &s->data_in[s->idx_in];
 684     s->req_in -= 4;
 685     s->idx_in += 4;
 686     return *data;
 687 }
 688
 689 void wm8750_set_bclk_in(void *opaque, int new_hz)
 690 {
 691     WM8750State *s = (WM8750State *) opaque;
 692
 693     s->ext_adc_hz = new_hz;
 694     s->ext_dac_hz = new_hz;
 695     wm8750_clk_update(s, 1);
 696 }
 697
 698 static void wm8750_class_init(ObjectClass *klass, void *data)
 699 {
 700     DeviceClass *dc = DEVICE_CLASS(klass);
 701     I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
 702
 703     sc->init = wm8750_init;
 704     sc->event = wm8750_event;
 705     sc->recv = wm8750_rx;
 706     sc->send = wm8750_tx;
 707     dc->vmsd = &vmstate_wm8750;
 708 }
 709
 710 static const TypeInfo wm8750_info = {
 711     .name          = TYPE_WM8750,
 712     .parent        = TYPE_I2C_SLAVE,
 713     .instance_size = sizeof(WM8750State),
 714     .class_init    = wm8750_class_init,
 715 };
 716
 717 static void wm8750_register_types(void)
 718 {
 719     type_register_static(&wm8750_info);
 720 }
 721
 722 type_init(wm8750_register_types)