qemu

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"
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#include "audio/audio.h"
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#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 {
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    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;
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    uint8_t data_in[4096];
44
    uint8_t data_out[4096];
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    int idx_in, req_in;
46
    int idx_out, req_out;
47

48
    SWVoiceOut **out[2];
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    uint8_t outvol[7], outmute[2];
50
    SWVoiceIn **in[2];
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    uint8_t invol[4], inmute[2];
52

53
    uint8_t diff[2], pol, ds, monomix[2], alc, mute;
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    uint8_t path[4], mpath[2], power, format;
55
    const WMRate *rate;
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    uint8_t rate_vmstate;
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    int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
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};
59

60
/* pow(10.0, -i / 20.0) * 255, i = 0..42 */
61
static const uint8_t wm8750_vol_db_table[] = {
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    255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
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    40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
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    4, 4, 3, 3, 3, 2, 2
65
};
66

67
#define WM8750_OUTVOL_TRANSFORM(x)	wm8750_vol_db_table[(0x7f - x) / 3]
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#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,
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             sizeof(s->data_in) - s->idx_in);
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}
78

79
static inline void wm8750_out_flush(WM8750State *s)
80
{
81
    int sent = 0;
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    while (sent < s->idx_out)
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        sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
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                ?: s->idx_out;
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    s->idx_out = 0;
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}
87

88
static void wm8750_audio_in_cb(void *opaque, int avail_b)
89
{
90
    WM8750State *s = (WM8750State *) opaque;
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    s->req_in = avail_b;
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    s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
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}
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;
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        s->req_out = 0;
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        wm8750_out_flush(s);
103
    } else
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        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 */
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    {  384, 48000, 2304,  8000 },	/* SR: 00011 */
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    { 1536,  8000,  256, 48000 },	/* SR: 00100 */
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    { 2304,  8000,  384, 48000 },	/* SR: 00101 */
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    { 1536,  8000, 1536,  8000 },	/* SR: 00110 */
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    { 2304,  8000, 2304,  8000 },	/* SR: 00111 */
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    { 1024, 12000, 1024, 12000 },	/* SR: 01000 */
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    { 1526, 12000, 1536, 12000 },	/* SR: 01001 */
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    {  768, 16000,  768, 16000 },	/* SR: 01010 */
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    { 1152, 16000, 1152, 16000 },	/* SR: 01011 */
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    {  384, 32000,  384, 32000 },	/* SR: 01100 */
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    {  576, 32000,  576, 32000 },	/* SR: 01101 */
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    {  128, 96000,  128, 96000 },	/* SR: 01110 */
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    {  192, 96000,  192, 96000 },	/* SR: 01111 */
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    {  256, 44100,  256, 44100 },	/* SR: 10000 */
127
    {  384, 44100,  384, 44100 },	/* SR: 10001 */
128
    {  256, 44100, 1408,  8018 },	/* SR: 10010 */
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    {  384, 44100, 2112,  8018 },	/* SR: 10011 */
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    { 1408,  8018,  256, 44100 },	/* SR: 10100 */
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    { 2112,  8018,  384, 44100 },	/* SR: 10101 */
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    { 1408,  8018, 1408,  8018 },	/* SR: 10110 */
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    { 2112,  8018, 2112,  8018 },	/* SR: 10111 */
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    { 1024, 11025, 1024, 11025 },	/* SR: 11000 */
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    { 1536, 11025, 1536, 11025 },	/* SR: 11001 */
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    {  512, 22050,  512, 22050 },	/* SR: 11010 */
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    {  768, 22050,  768, 22050 },	/* SR: 11011 */
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    {  512, 24000,  512, 24000 },	/* SR: 11100 */
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    {  768, 24000,  768, 24000 },	/* SR: 11101 */
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    {  128, 88200,  128, 88200 },	/* SR: 11110 */
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    {  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]),
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                    s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
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    AUD_set_volume_in(s->adc_voice[1], s->mute,
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                    s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
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                    s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
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    AUD_set_volume_in(s->adc_voice[2], s->mute,
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                    s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
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                    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,
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                    s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
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                    s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
164

165
    /* Headphone: LOUT1VOL ROUT1VOL */
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    AUD_set_volume_out(s->dac_voice[1], s->mute,
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                    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 */
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    AUD_set_volume_out(s->dac_voice[2], s->mute,
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                    s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
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                    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);
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    s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
212
                    CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
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    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);
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    s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
225
                    CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
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    /* 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