xref: /qemu/hw/audio/wm8750.c (revision 333b3e5fab751cce9f077b827563296c797ff399)
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 "qemu/osdep.h"
11  #include "hw/i2c/i2c.h"
12  #include "migration/vmstate.h"
13  #include "qemu/module.h"
14  #include "hw/audio/wm8750.h"
15  #include "audio/audio.h"
16  #include "qom/object.h"
17  
18  #define IN_PORT_N	3
19  #define OUT_PORT_N	3
20  
21  #define CODEC		"wm8750"
22  
23  typedef struct {
24      int adc;
25      int adc_hz;
26      int dac;
27      int dac_hz;
28  } WMRate;
29  
30  OBJECT_DECLARE_SIMPLE_TYPE(WM8750State, WM8750)
31  
32  struct WM8750State {
33      I2CSlave parent_obj;
34  
35      uint8_t i2c_data[2];
36      int i2c_len;
37      QEMUSoundCard card;
38      SWVoiceIn *adc_voice[IN_PORT_N];
39      SWVoiceOut *dac_voice[OUT_PORT_N];
40      int enable;
41      void (*data_req)(void *, int, int);
42      void *opaque;
43      uint8_t data_in[4096];
44      uint8_t data_out[4096];
45      int idx_in, req_in;
46      int idx_out, req_out;
47  
48      SWVoiceOut **out[2];
49      uint8_t outvol[7], outmute[2];
50      SWVoiceIn **in[2];
51      uint8_t invol[4], inmute[2];
52  
53      uint8_t diff[2], pol, ds, monomix[2], alc, mute;
54      uint8_t path[4], mpath[2], power, format;
55      const WMRate *rate;
56      uint8_t rate_vmstate;
57      int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
58  };
59  
60  /* pow(10.0, -i / 20.0) * 255, i = 0..42 */
61  static const uint8_t wm8750_vol_db_table[] = {
62      255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
63      40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
64      4, 4, 3, 3, 3, 2, 2
65  };
66  
67  #define WM8750_OUTVOL_TRANSFORM(x)	wm8750_vol_db_table[(0x7f - x) / 3]
68  #define WM8750_INVOL_TRANSFORM(x)	(x << 2)
69  
70  static inline void wm8750_in_load(WM8750State *s)
71  {
72      if (s->idx_in + s->req_in <= sizeof(s->data_in))
73          return;
74      s->idx_in = MAX(0, (int) sizeof(s->data_in) - s->req_in);
75      AUD_read(*s->in[0], s->data_in + s->idx_in,
76               sizeof(s->data_in) - s->idx_in);
77  }
78  
79  static inline void wm8750_out_flush(WM8750State *s)
80  {
81      int sent = 0;
82      while (sent < s->idx_out)
83          sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
84                  ?: s->idx_out;
85      s->idx_out = 0;
86  }
87  
88  static void wm8750_audio_in_cb(void *opaque, int avail_b)
89  {
90      WM8750State *s = (WM8750State *) opaque;
91      s->req_in = avail_b;
92      s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
93  }
94  
95  static void wm8750_audio_out_cb(void *opaque, int free_b)
96  {
97      WM8750State *s = (WM8750State *) opaque;
98  
99      if (s->idx_out >= free_b) {
100          s->idx_out = free_b;
101          s->req_out = 0;
102          wm8750_out_flush(s);
103      } else
104          s->req_out = free_b - s->idx_out;
105  
106      s->data_req(s->opaque, s->req_out >> 2, s->req_in >> 2);
107  }
108  
109  static const WMRate wm_rate_table[] = {
110      {  256, 48000,  256, 48000 },	/* SR: 00000 */
111      {  384, 48000,  384, 48000 },	/* SR: 00001 */
112      {  256, 48000, 1536,  8000 },	/* SR: 00010 */
113      {  384, 48000, 2304,  8000 },	/* SR: 00011 */
114      { 1536,  8000,  256, 48000 },	/* SR: 00100 */
115      { 2304,  8000,  384, 48000 },	/* SR: 00101 */
116      { 1536,  8000, 1536,  8000 },	/* SR: 00110 */
117      { 2304,  8000, 2304,  8000 },	/* SR: 00111 */
118      { 1024, 12000, 1024, 12000 },	/* SR: 01000 */
119      { 1526, 12000, 1536, 12000 },	/* SR: 01001 */
120      {  768, 16000,  768, 16000 },	/* SR: 01010 */
121      { 1152, 16000, 1152, 16000 },	/* SR: 01011 */
122      {  384, 32000,  384, 32000 },	/* SR: 01100 */
123      {  576, 32000,  576, 32000 },	/* SR: 01101 */
124      {  128, 96000,  128, 96000 },	/* SR: 01110 */
125      {  192, 96000,  192, 96000 },	/* SR: 01111 */
126      {  256, 44100,  256, 44100 },	/* SR: 10000 */
127      {  384, 44100,  384, 44100 },	/* SR: 10001 */
128      {  256, 44100, 1408,  8018 },	/* SR: 10010 */
129      {  384, 44100, 2112,  8018 },	/* SR: 10011 */
130      { 1408,  8018,  256, 44100 },	/* SR: 10100 */
131      { 2112,  8018,  384, 44100 },	/* SR: 10101 */
132      { 1408,  8018, 1408,  8018 },	/* SR: 10110 */
133      { 2112,  8018, 2112,  8018 },	/* SR: 10111 */
134      { 1024, 11025, 1024, 11025 },	/* SR: 11000 */
135      { 1536, 11025, 1536, 11025 },	/* SR: 11001 */
136      {  512, 22050,  512, 22050 },	/* SR: 11010 */
137      {  768, 22050,  768, 22050 },	/* SR: 11011 */
138      {  512, 24000,  512, 24000 },	/* SR: 11100 */
139      {  768, 24000,  768, 24000 },	/* SR: 11101 */
140      {  128, 88200,  128, 88200 },	/* SR: 11110 */
141      {  192, 88200,  192, 88200 },	/* SR: 11111 */
142  };
143  
144  static void wm8750_vol_update(WM8750State *s)
145  {
146      /* FIXME: multiply all volumes by s->invol[2], s->invol[3] */
147  
148      AUD_set_volume_in(s->adc_voice[0], 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[1], 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      AUD_set_volume_in(s->adc_voice[2], s->mute,
155                      s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
156                      s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
157  
158      /* FIXME: multiply all volumes by s->outvol[0], s->outvol[1] */
159  
160      /* Speaker: LOUT2VOL ROUT2VOL */
161      AUD_set_volume_out(s->dac_voice[0], s->mute,
162                      s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
163                      s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
164  
165      /* Headphone: LOUT1VOL ROUT1VOL */
166      AUD_set_volume_out(s->dac_voice[1], s->mute,
167                      s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[2]),
168                      s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[3]));
169  
170      /* MONOOUT: MONOVOL MONOVOL */
171      AUD_set_volume_out(s->dac_voice[2], s->mute,
172                      s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
173                      s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]));
174  }
175  
176  static void wm8750_set_format(WM8750State *s)
177  {
178      int i;
179      struct audsettings in_fmt;
180      struct audsettings out_fmt;
181  
182      wm8750_out_flush(s);
183  
184      if (s->in[0] && *s->in[0])
185          AUD_set_active_in(*s->in[0], 0);
186      if (s->out[0] && *s->out[0])
187          AUD_set_active_out(*s->out[0], 0);
188  
189      for (i = 0; i < IN_PORT_N; i ++)
190          if (s->adc_voice[i]) {
191              AUD_close_in(&s->card, s->adc_voice[i]);
192              s->adc_voice[i] = NULL;
193          }
194      for (i = 0; i < OUT_PORT_N; i ++)
195          if (s->dac_voice[i]) {
196              AUD_close_out(&s->card, s->dac_voice[i]);
197              s->dac_voice[i] = NULL;
198          }
199  
200      if (!s->enable)
201          return;
202  
203      /* Setup input */
204      in_fmt.endianness = 0;
205      in_fmt.nchannels = 2;
206      in_fmt.freq = s->adc_hz;
207      in_fmt.fmt = AUDIO_FORMAT_S16;
208  
209      s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
210                      CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
211      s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
212                      CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
213      s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
214                      CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
215  
216      /* Setup output */
217      out_fmt.endianness = 0;
218      out_fmt.nchannels = 2;
219      out_fmt.freq = s->dac_hz;
220      out_fmt.fmt = AUDIO_FORMAT_S16;
221  
222      s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
223                      CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
224      s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
225                      CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
226      /* MONOMIX is also in stereo for simplicity */
227      s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
228                      CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
229      /* no sense emulating OUT3 which is a mix of other outputs */
230  
231      wm8750_vol_update(s);
232  
233      /* We should connect the left and right channels to their
234       * respective inputs/outputs but we have completely no need
235       * for mixing or combining paths to different ports, so we
236       * connect both channels to where the left channel is routed.  */
237      if (s->in[0] && *s->in[0])
238          AUD_set_active_in(*s->in[0], 1);
239      if (s->out[0] && *s->out[0])
240          AUD_set_active_out(*s->out[0], 1);
241  }
242  
243  static void wm8750_clk_update(WM8750State *s, int ext)
244  {
245      if (s->master || !s->ext_dac_hz)
246          s->dac_hz = s->rate->dac_hz;
247      else
248          s->dac_hz = s->ext_dac_hz;
249  
250      if (s->master || !s->ext_adc_hz)
251          s->adc_hz = s->rate->adc_hz;
252      else
253          s->adc_hz = s->ext_adc_hz;
254  
255      if (s->master || (!s->ext_dac_hz && !s->ext_adc_hz)) {
256          if (!ext)
257              wm8750_set_format(s);
258      } else {
259          if (ext)
260              wm8750_set_format(s);
261      }
262  }
263  
264  static void wm8750_reset(I2CSlave *i2c)
265  {
266      WM8750State *s = WM8750(i2c);
267  
268      s->rate = &wm_rate_table[0];
269      s->enable = 0;
270      wm8750_clk_update(s, 1);
271      s->diff[0] = 0;
272      s->diff[1] = 0;
273      s->ds = 0;
274      s->alc = 0;
275      s->in[0] = &s->adc_voice[0];
276      s->invol[0] = 0x17;
277      s->invol[1] = 0x17;
278      s->invol[2] = 0xc3;
279      s->invol[3] = 0xc3;
280      s->out[0] = &s->dac_voice[0];
281      s->outvol[0] = 0xff;
282      s->outvol[1] = 0xff;
283      s->outvol[2] = 0x79;
284      s->outvol[3] = 0x79;
285      s->outvol[4] = 0x79;
286      s->outvol[5] = 0x79;
287      s->outvol[6] = 0x79;
288      s->inmute[0] = 0;
289      s->inmute[1] = 0;
290      s->outmute[0] = 0;
291      s->outmute[1] = 0;
292      s->mute = 1;
293      s->path[0] = 0;
294      s->path[1] = 0;
295      s->path[2] = 0;
296      s->path[3] = 0;
297      s->mpath[0] = 0;
298      s->mpath[1] = 0;
299      s->format = 0x0a;
300      s->idx_in = sizeof(s->data_in);
301      s->req_in = 0;
302      s->idx_out = 0;
303      s->req_out = 0;
304      wm8750_vol_update(s);
305      s->i2c_len = 0;
306  }
307  
308  static int wm8750_event(I2CSlave *i2c, enum i2c_event event)
309  {
310      WM8750State *s = WM8750(i2c);
311  
312      switch (event) {
313      case I2C_START_SEND:
314          s->i2c_len = 0;
315          break;
316      case I2C_FINISH:
317  #ifdef VERBOSE
318          if (s->i2c_len < 2)
319              printf("%s: message too short (%i bytes)\n",
320                              __func__, s->i2c_len);
321  #endif
322          break;
323      default:
324          break;
325      }
326  
327      return 0;
328  }
329  
330  #define WM8750_LINVOL	0x00
331  #define WM8750_RINVOL	0x01
332  #define WM8750_LOUT1V	0x02
333  #define WM8750_ROUT1V	0x03
334  #define WM8750_ADCDAC	0x05
335  #define WM8750_IFACE	0x07
336  #define WM8750_SRATE	0x08
337  #define WM8750_LDAC	0x0a
338  #define WM8750_RDAC	0x0b
339  #define WM8750_BASS	0x0c
340  #define WM8750_TREBLE	0x0d
341  #define WM8750_RESET	0x0f
342  #define WM8750_3D	0x10
343  #define WM8750_ALC1	0x11
344  #define WM8750_ALC2	0x12
345  #define WM8750_ALC3	0x13
346  #define WM8750_NGATE	0x14
347  #define WM8750_LADC	0x15
348  #define WM8750_RADC	0x16
349  #define WM8750_ADCTL1	0x17
350  #define WM8750_ADCTL2	0x18
351  #define WM8750_PWR1	0x19
352  #define WM8750_PWR2	0x1a
353  #define WM8750_ADCTL3	0x1b
354  #define WM8750_ADCIN	0x1f
355  #define WM8750_LADCIN	0x20
356  #define WM8750_RADCIN	0x21
357  #define WM8750_LOUTM1	0x22
358  #define WM8750_LOUTM2	0x23
359  #define WM8750_ROUTM1	0x24
360  #define WM8750_ROUTM2	0x25
361  #define WM8750_MOUTM1	0x26
362  #define WM8750_MOUTM2	0x27
363  #define WM8750_LOUT2V	0x28
364  #define WM8750_ROUT2V	0x29
365  #define WM8750_MOUTV	0x2a
366  
367  static int wm8750_tx(I2CSlave *i2c, uint8_t data)
368  {
369      WM8750State *s = WM8750(i2c);
370      uint8_t cmd;
371      uint16_t value;
372  
373      if (s->i2c_len >= 2) {
374  #ifdef VERBOSE
375          printf("%s: long message (%i bytes)\n", __func__, s->i2c_len);
376  #endif
377          return 1;
378      }
379      s->i2c_data[s->i2c_len ++] = data;
380      if (s->i2c_len != 2)
381          return 0;
382  
383      cmd = s->i2c_data[0] >> 1;
384      value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
385  
386      switch (cmd) {
387      case WM8750_LADCIN:	/* ADC Signal Path Control (Left) */
388          s->diff[0] = (((value >> 6) & 3) == 3);	/* LINSEL */
389          if (s->diff[0])
390              s->in[0] = &s->adc_voice[0 + s->ds * 1];
391          else
392              s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
393          break;
394  
395      case WM8750_RADCIN:	/* ADC Signal Path Control (Right) */
396          s->diff[1] = (((value >> 6) & 3) == 3);	/* RINSEL */
397          if (s->diff[1])
398              s->in[1] = &s->adc_voice[0 + s->ds * 1];
399          else
400              s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
401          break;
402  
403      case WM8750_ADCIN:	/* ADC Input Mode */
404          s->ds = (value >> 8) & 1;	/* DS */
405          if (s->diff[0])
406              s->in[0] = &s->adc_voice[0 + s->ds * 1];
407          if (s->diff[1])
408              s->in[1] = &s->adc_voice[0 + s->ds * 1];
409          s->monomix[0] = (value >> 6) & 3;	/* MONOMIX */
410          break;
411  
412      case WM8750_ADCTL1:	/* Additional Control (1) */
413          s->monomix[1] = (value >> 1) & 1;	/* DMONOMIX */
414          break;
415  
416      case WM8750_PWR1:	/* Power Management (1) */
417          s->enable = ((value >> 6) & 7) == 3;	/* VMIDSEL, VREF */
418          wm8750_set_format(s);
419          break;
420  
421      case WM8750_LINVOL:	/* Left Channel PGA */
422          s->invol[0] = value & 0x3f;		/* LINVOL */
423          s->inmute[0] = (value >> 7) & 1;	/* LINMUTE */
424          wm8750_vol_update(s);
425          break;
426  
427      case WM8750_RINVOL:	/* Right Channel PGA */
428          s->invol[1] = value & 0x3f;		/* RINVOL */
429          s->inmute[1] = (value >> 7) & 1;	/* RINMUTE */
430          wm8750_vol_update(s);
431          break;
432  
433      case WM8750_ADCDAC:	/* ADC and DAC Control */
434          s->pol = (value >> 5) & 3;		/* ADCPOL */
435          s->mute = (value >> 3) & 1;		/* DACMU */
436          wm8750_vol_update(s);
437          break;
438  
439      case WM8750_ADCTL3:	/* Additional Control (3) */
440          break;
441  
442      case WM8750_LADC:	/* Left ADC Digital Volume */
443          s->invol[2] = value & 0xff;		/* LADCVOL */
444          wm8750_vol_update(s);
445          break;
446  
447      case WM8750_RADC:	/* Right ADC Digital Volume */
448          s->invol[3] = value & 0xff;		/* RADCVOL */
449          wm8750_vol_update(s);
450          break;
451  
452      case WM8750_ALC1:	/* ALC Control (1) */
453          s->alc = (value >> 7) & 3;		/* ALCSEL */
454          break;
455  
456      case WM8750_NGATE:	/* Noise Gate Control */
457      case WM8750_3D:	/* 3D enhance */
458          break;
459  
460      case WM8750_LDAC:	/* Left Channel Digital Volume */
461          s->outvol[0] = value & 0xff;		/* LDACVOL */
462          wm8750_vol_update(s);
463          break;
464  
465      case WM8750_RDAC:	/* Right Channel Digital Volume */
466          s->outvol[1] = value & 0xff;		/* RDACVOL */
467          wm8750_vol_update(s);
468          break;
469  
470      case WM8750_BASS:	/* Bass Control */
471          break;
472  
473      case WM8750_LOUTM1:	/* Left Mixer Control (1) */
474          s->path[0] = (value >> 8) & 1;		/* LD2LO */
475          /* TODO: mute/unmute respective paths */
476          wm8750_vol_update(s);
477          break;
478  
479      case WM8750_LOUTM2:	/* Left Mixer Control (2) */
480          s->path[1] = (value >> 8) & 1;		/* RD2LO */
481          /* TODO: mute/unmute respective paths */
482          wm8750_vol_update(s);
483          break;
484  
485      case WM8750_ROUTM1:	/* Right Mixer Control (1) */
486          s->path[2] = (value >> 8) & 1;		/* LD2RO */
487          /* TODO: mute/unmute respective paths */
488          wm8750_vol_update(s);
489          break;
490  
491      case WM8750_ROUTM2:	/* Right Mixer Control (2) */
492          s->path[3] = (value >> 8) & 1;		/* RD2RO */
493          /* TODO: mute/unmute respective paths */
494          wm8750_vol_update(s);
495          break;
496  
497      case WM8750_MOUTM1:	/* Mono Mixer Control (1) */
498          s->mpath[0] = (value >> 8) & 1;		/* LD2MO */
499          /* TODO: mute/unmute respective paths */
500          wm8750_vol_update(s);
501          break;
502  
503      case WM8750_MOUTM2:	/* Mono Mixer Control (2) */
504          s->mpath[1] = (value >> 8) & 1;		/* RD2MO */
505          /* TODO: mute/unmute respective paths */
506          wm8750_vol_update(s);
507          break;
508  
509      case WM8750_LOUT1V:	/* LOUT1 Volume */
510          s->outvol[2] = value & 0x7f;		/* LOUT1VOL */
511          wm8750_vol_update(s);
512          break;
513  
514      case WM8750_LOUT2V:	/* LOUT2 Volume */
515          s->outvol[4] = value & 0x7f;		/* LOUT2VOL */
516          wm8750_vol_update(s);
517          break;
518  
519      case WM8750_ROUT1V:	/* ROUT1 Volume */
520          s->outvol[3] = value & 0x7f;		/* ROUT1VOL */
521          wm8750_vol_update(s);
522          break;
523  
524      case WM8750_ROUT2V:	/* ROUT2 Volume */
525          s->outvol[5] = value & 0x7f;		/* ROUT2VOL */
526          wm8750_vol_update(s);
527          break;
528  
529      case WM8750_MOUTV:	/* MONOOUT Volume */
530          s->outvol[6] = value & 0x7f;		/* MONOOUTVOL */
531          wm8750_vol_update(s);
532          break;
533  
534      case WM8750_ADCTL2:	/* Additional Control (2) */
535          break;
536  
537      case WM8750_PWR2:	/* Power Management (2) */
538          s->power = value & 0x7e;
539          /* TODO: mute/unmute respective paths */
540          wm8750_vol_update(s);
541          break;
542  
543      case WM8750_IFACE:	/* Digital Audio Interface Format */
544          s->format = value;
545          s->master = (value >> 6) & 1;			/* MS */
546          wm8750_clk_update(s, s->master);
547          break;
548  
549      case WM8750_SRATE:	/* Clocking and Sample Rate Control */
550          s->rate = &wm_rate_table[(value >> 1) & 0x1f];
551          wm8750_clk_update(s, 0);
552          break;
553  
554      case WM8750_RESET:	/* Reset */
555          wm8750_reset(I2C_SLAVE(s));
556          break;
557  
558  #ifdef VERBOSE
559      default:
560          printf("%s: unknown register %02x\n", __func__, cmd);
561  #endif
562      }
563  
564      return 0;
565  }
566  
567  static uint8_t wm8750_rx(I2CSlave *i2c)
568  {
569      return 0x00;
570  }
571  
572  static int wm8750_pre_save(void *opaque)
573  {
574      WM8750State *s = opaque;
575  
576      s->rate_vmstate = s->rate - wm_rate_table;
577  
578      return 0;
579  }
580  
581  static int wm8750_post_load(void *opaque, int version_id)
582  {
583      WM8750State *s = opaque;
584  
585      s->rate = &wm_rate_table[s->rate_vmstate & 0x1f];
586      return 0;
587  }
588  
589  static const VMStateDescription vmstate_wm8750 = {
590      .name = CODEC,
591      .version_id = 0,
592      .minimum_version_id = 0,
593      .pre_save = wm8750_pre_save,
594      .post_load = wm8750_post_load,
595      .fields = (const VMStateField[]) {
596          VMSTATE_UINT8_ARRAY(i2c_data, WM8750State, 2),
597          VMSTATE_INT32(i2c_len, WM8750State),
598          VMSTATE_INT32(enable, WM8750State),
599          VMSTATE_INT32(idx_in, WM8750State),
600          VMSTATE_INT32(req_in, WM8750State),
601          VMSTATE_INT32(idx_out, WM8750State),
602          VMSTATE_INT32(req_out, WM8750State),
603          VMSTATE_UINT8_ARRAY(outvol, WM8750State, 7),
604          VMSTATE_UINT8_ARRAY(outmute, WM8750State, 2),
605          VMSTATE_UINT8_ARRAY(invol, WM8750State, 4),
606          VMSTATE_UINT8_ARRAY(inmute, WM8750State, 2),
607          VMSTATE_UINT8_ARRAY(diff, WM8750State, 2),
608          VMSTATE_UINT8(pol, WM8750State),
609          VMSTATE_UINT8(ds, WM8750State),
610          VMSTATE_UINT8_ARRAY(monomix, WM8750State, 2),
611          VMSTATE_UINT8(alc, WM8750State),
612          VMSTATE_UINT8(mute, WM8750State),
613          VMSTATE_UINT8_ARRAY(path, WM8750State, 4),
614          VMSTATE_UINT8_ARRAY(mpath, WM8750State, 2),
615          VMSTATE_UINT8(format, WM8750State),
616          VMSTATE_UINT8(power, WM8750State),
617          VMSTATE_UINT8(rate_vmstate, WM8750State),
618          VMSTATE_I2C_SLAVE(parent_obj, WM8750State),
619          VMSTATE_END_OF_LIST()
620      }
621  };
622  
623  static void wm8750_realize(DeviceState *dev, Error **errp)
624  {
625      WM8750State *s = WM8750(dev);
626  
627      if (!AUD_register_card(CODEC, &s->card, errp)) {
628          return;
629      }
630  
631      wm8750_reset(I2C_SLAVE(s));
632  }
633  
634  #if 0
635  static void wm8750_fini(I2CSlave *i2c)
636  {
637      WM8750State *s = WM8750(i2c);
638  
639      wm8750_reset(I2C_SLAVE(s));
640      AUD_remove_card(&s->card);
641      g_free(s);
642  }
643  #endif
644  
645  void wm8750_data_req_set(DeviceState *dev, data_req_cb *data_req, void *opaque)
646  {
647      WM8750State *s = WM8750(dev);
648  
649      s->data_req = data_req;
650      s->opaque = opaque;
651  }
652  
653  void wm8750_dac_dat(void *opaque, uint32_t sample)
654  {
655      WM8750State *s = (WM8750State *) opaque;
656  
657      *(uint32_t *) &s->data_out[s->idx_out] = sample;
658      s->req_out -= 4;
659      s->idx_out += 4;
660      if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
661          wm8750_out_flush(s);
662  }
663  
664  void *wm8750_dac_buffer(void *opaque, int samples)
665  {
666      WM8750State *s = (WM8750State *) opaque;
667      /* XXX: Should check if there are <i>samples</i> free samples available */
668      void *ret = s->data_out + s->idx_out;
669  
670      s->idx_out += samples << 2;
671      s->req_out -= samples << 2;
672      return ret;
673  }
674  
675  void wm8750_dac_commit(void *opaque)
676  {
677      WM8750State *s = (WM8750State *) opaque;
678  
679      wm8750_out_flush(s);
680  }
681  
682  uint32_t wm8750_adc_dat(void *opaque)
683  {
684      WM8750State *s = (WM8750State *) opaque;
685      uint32_t *data;
686  
687      if (s->idx_in >= sizeof(s->data_in)) {
688          wm8750_in_load(s);
689          if (s->idx_in >= sizeof(s->data_in)) {
690              return 0x80008000; /* silence in AUDIO_FORMAT_S16 sample format */
691          }
692      }
693  
694      data = (uint32_t *) &s->data_in[s->idx_in];
695      s->req_in -= 4;
696      s->idx_in += 4;
697      return *data;
698  }
699  
700  void wm8750_set_bclk_in(void *opaque, int new_hz)
701  {
702      WM8750State *s = (WM8750State *) opaque;
703  
704      s->ext_adc_hz = new_hz;
705      s->ext_dac_hz = new_hz;
706      wm8750_clk_update(s, 1);
707  }
708  
709  static Property wm8750_properties[] = {
710      DEFINE_AUDIO_PROPERTIES(WM8750State, card),
711      DEFINE_PROP_END_OF_LIST(),
712  };
713  
714  static void wm8750_class_init(ObjectClass *klass, void *data)
715  {
716      DeviceClass *dc = DEVICE_CLASS(klass);
717      I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
718  
719      dc->realize = wm8750_realize;
720      sc->event = wm8750_event;
721      sc->recv = wm8750_rx;
722      sc->send = wm8750_tx;
723      dc->vmsd = &vmstate_wm8750;
724      device_class_set_props(dc, wm8750_properties);
725  }
726  
727  static const TypeInfo wm8750_info = {
728      .name          = TYPE_WM8750,
729      .parent        = TYPE_I2C_SLAVE,
730      .instance_size = sizeof(WM8750State),
731      .class_init    = wm8750_class_init,
732  };
733  
734  static void wm8750_register_types(void)
735  {
736      type_register_static(&wm8750_info);
737  }
738  
739  type_init(wm8750_register_types)
740