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xemu/hw/audio/wm8750.c
Corey Minyard 2ac4c5f4d2 i2c: have I2C receive operation return uint8_t 
It is never supposed to fail and cannot return an error, so just
have it return the proper type.  Have it return 0xff on nothing
available, since that's what would happen on a real bus.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-02-27 21:06:08 -06:00

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/*
* WM8750 audio CODEC.
*
* Copyright (c) 2006 Openedhand Ltd.
* Written by Andrzej Zaborowski <balrog@zabor.org>
*
* This file is licensed under GNU GPL.
*/
#include "qemu/osdep.h"
#include "hw/i2c/i2c.h"
#include "hw/audio/wm8750.h"
#include "audio/audio.h"
#define IN_PORT_N 3
#define OUT_PORT_N 3
#define CODEC "wm8750"
typedef struct {
int adc;
int adc_hz;
int dac;
int dac_hz;
} WMRate;
#define WM8750(obj) OBJECT_CHECK(WM8750State, (obj), TYPE_WM8750)
typedef struct WM8750State {
I2CSlave parent_obj;
uint8_t i2c_data[2];
int i2c_len;
QEMUSoundCard card;
SWVoiceIn *adc_voice[IN_PORT_N];
SWVoiceOut *dac_voice[OUT_PORT_N];
int enable;
void (*data_req)(void *, int, int);
void *opaque;
uint8_t data_in[4096];
uint8_t data_out[4096];
int idx_in, req_in;
int idx_out, req_out;
SWVoiceOut **out[2];
uint8_t outvol[7], outmute[2];
SWVoiceIn **in[2];
uint8_t invol[4], inmute[2];
uint8_t diff[2], pol, ds, monomix[2], alc, mute;
uint8_t path[4], mpath[2], power, format;
const WMRate *rate;
uint8_t rate_vmstate;
int adc_hz, dac_hz, ext_adc_hz, ext_dac_hz, master;
} WM8750State;
/* pow(10.0, -i / 20.0) * 255, i = 0..42 */
static const uint8_t wm8750_vol_db_table[] = {
255, 227, 203, 181, 161, 143, 128, 114, 102, 90, 81, 72, 64, 57, 51, 45,
40, 36, 32, 29, 26, 23, 20, 18, 16, 14, 13, 11, 10, 9, 8, 7, 6, 6, 5, 5,
4, 4, 3, 3, 3, 2, 2
};
#define WM8750_OUTVOL_TRANSFORM(x) wm8750_vol_db_table[(0x7f - x) / 3]
#define WM8750_INVOL_TRANSFORM(x) (x << 2)
static inline void wm8750_in_load(WM8750State *s)
{
if (s->idx_in + s->req_in <= sizeof(s->data_in))
return;
s->idx_in = audio_MAX(0, (int) sizeof(s->data_in) - s->req_in);
AUD_read(*s->in[0], s->data_in + s->idx_in,
sizeof(s->data_in) - s->idx_in);
}
static inline void wm8750_out_flush(WM8750State *s)
{
int sent = 0;
while (sent < s->idx_out)
sent += AUD_write(*s->out[0], s->data_out + sent, s->idx_out - sent)
?: s->idx_out;
s->idx_out = 0;
}
static void wm8750_audio_in_cb(void *opaque, int avail_b)
{
WM8750State *s = (WM8750State *) opaque;
s->req_in = avail_b;
s->data_req(s->opaque, s->req_out >> 2, avail_b >> 2);
}
static void wm8750_audio_out_cb(void *opaque, int free_b)
{
WM8750State *s = (WM8750State *) opaque;
if (s->idx_out >= free_b) {
s->idx_out = free_b;
s->req_out = 0;
wm8750_out_flush(s);
} else
s->req_out = free_b - s->idx_out;
s->data_req(s->opaque, s->req_out >> 2, s->req_in >> 2);
}
static const WMRate wm_rate_table[] = {
{ 256, 48000, 256, 48000 }, /* SR: 00000 */
{ 384, 48000, 384, 48000 }, /* SR: 00001 */
{ 256, 48000, 1536, 8000 }, /* SR: 00010 */
{ 384, 48000, 2304, 8000 }, /* SR: 00011 */
{ 1536, 8000, 256, 48000 }, /* SR: 00100 */
{ 2304, 8000, 384, 48000 }, /* SR: 00101 */
{ 1536, 8000, 1536, 8000 }, /* SR: 00110 */
{ 2304, 8000, 2304, 8000 }, /* SR: 00111 */
{ 1024, 12000, 1024, 12000 }, /* SR: 01000 */
{ 1526, 12000, 1536, 12000 }, /* SR: 01001 */
{ 768, 16000, 768, 16000 }, /* SR: 01010 */
{ 1152, 16000, 1152, 16000 }, /* SR: 01011 */
{ 384, 32000, 384, 32000 }, /* SR: 01100 */
{ 576, 32000, 576, 32000 }, /* SR: 01101 */
{ 128, 96000, 128, 96000 }, /* SR: 01110 */
{ 192, 96000, 192, 96000 }, /* SR: 01111 */
{ 256, 44100, 256, 44100 }, /* SR: 10000 */
{ 384, 44100, 384, 44100 }, /* SR: 10001 */
{ 256, 44100, 1408, 8018 }, /* SR: 10010 */
{ 384, 44100, 2112, 8018 }, /* SR: 10011 */
{ 1408, 8018, 256, 44100 }, /* SR: 10100 */
{ 2112, 8018, 384, 44100 }, /* SR: 10101 */
{ 1408, 8018, 1408, 8018 }, /* SR: 10110 */
{ 2112, 8018, 2112, 8018 }, /* SR: 10111 */
{ 1024, 11025, 1024, 11025 }, /* SR: 11000 */
{ 1536, 11025, 1536, 11025 }, /* SR: 11001 */
{ 512, 22050, 512, 22050 }, /* SR: 11010 */
{ 768, 22050, 768, 22050 }, /* SR: 11011 */
{ 512, 24000, 512, 24000 }, /* SR: 11100 */
{ 768, 24000, 768, 24000 }, /* SR: 11101 */
{ 128, 88200, 128, 88200 }, /* SR: 11110 */
{ 192, 88200, 192, 88200 }, /* SR: 11111 */
};
static void wm8750_vol_update(WM8750State *s)
{
/* FIXME: multiply all volumes by s->invol[2], s->invol[3] */
AUD_set_volume_in(s->adc_voice[0], s->mute,
s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
AUD_set_volume_in(s->adc_voice[1], s->mute,
s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
AUD_set_volume_in(s->adc_voice[2], s->mute,
s->inmute[0] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[0]),
s->inmute[1] ? 0 : WM8750_INVOL_TRANSFORM(s->invol[1]));
/* FIXME: multiply all volumes by s->outvol[0], s->outvol[1] */
/* Speaker: LOUT2VOL ROUT2VOL */
AUD_set_volume_out(s->dac_voice[0], s->mute,
s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[4]),
s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[5]));
/* Headphone: LOUT1VOL ROUT1VOL */
AUD_set_volume_out(s->dac_voice[1], s->mute,
s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[2]),
s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[3]));
/* MONOOUT: MONOVOL MONOVOL */
AUD_set_volume_out(s->dac_voice[2], s->mute,
s->outmute[0] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]),
s->outmute[1] ? 0 : WM8750_OUTVOL_TRANSFORM(s->outvol[6]));
}
static void wm8750_set_format(WM8750State *s)
{
int i;
struct audsettings in_fmt;
struct audsettings out_fmt;
wm8750_out_flush(s);
if (s->in[0] && *s->in[0])
AUD_set_active_in(*s->in[0], 0);
if (s->out[0] && *s->out[0])
AUD_set_active_out(*s->out[0], 0);
for (i = 0; i < IN_PORT_N; i ++)
if (s->adc_voice[i]) {
AUD_close_in(&s->card, s->adc_voice[i]);
s->adc_voice[i] = NULL;
}
for (i = 0; i < OUT_PORT_N; i ++)
if (s->dac_voice[i]) {
AUD_close_out(&s->card, s->dac_voice[i]);
s->dac_voice[i] = NULL;
}
if (!s->enable)
return;
/* Setup input */
in_fmt.endianness = 0;
in_fmt.nchannels = 2;
in_fmt.freq = s->adc_hz;
in_fmt.fmt = AUD_FMT_S16;
s->adc_voice[0] = AUD_open_in(&s->card, s->adc_voice[0],
CODEC ".input1", s, wm8750_audio_in_cb, &in_fmt);
s->adc_voice[1] = AUD_open_in(&s->card, s->adc_voice[1],
CODEC ".input2", s, wm8750_audio_in_cb, &in_fmt);
s->adc_voice[2] = AUD_open_in(&s->card, s->adc_voice[2],
CODEC ".input3", s, wm8750_audio_in_cb, &in_fmt);
/* Setup output */
out_fmt.endianness = 0;
out_fmt.nchannels = 2;
out_fmt.freq = s->dac_hz;
out_fmt.fmt = AUD_FMT_S16;
s->dac_voice[0] = AUD_open_out(&s->card, s->dac_voice[0],
CODEC ".speaker", s, wm8750_audio_out_cb, &out_fmt);
s->dac_voice[1] = AUD_open_out(&s->card, s->dac_voice[1],
CODEC ".headphone", s, wm8750_audio_out_cb, &out_fmt);
/* MONOMIX is also in stereo for simplicity */
s->dac_voice[2] = AUD_open_out(&s->card, s->dac_voice[2],
CODEC ".monomix", s, wm8750_audio_out_cb, &out_fmt);
/* no sense emulating OUT3 which is a mix of other outputs */
wm8750_vol_update(s);
/* We should connect the left and right channels to their
* respective inputs/outputs but we have completely no need
* for mixing or combining paths to different ports, so we
* connect both channels to where the left channel is routed. */
if (s->in[0] && *s->in[0])
AUD_set_active_in(*s->in[0], 1);
if (s->out[0] && *s->out[0])
AUD_set_active_out(*s->out[0], 1);
}
static void wm8750_clk_update(WM8750State *s, int ext)
{
if (s->master || !s->ext_dac_hz)
s->dac_hz = s->rate->dac_hz;
else
s->dac_hz = s->ext_dac_hz;
if (s->master || !s->ext_adc_hz)
s->adc_hz = s->rate->adc_hz;
else
s->adc_hz = s->ext_adc_hz;
if (s->master || (!s->ext_dac_hz && !s->ext_adc_hz)) {
if (!ext)
wm8750_set_format(s);
} else {
if (ext)
wm8750_set_format(s);
}
}
static void wm8750_reset(I2CSlave *i2c)
{
WM8750State *s = WM8750(i2c);
s->rate = &wm_rate_table[0];
s->enable = 0;
wm8750_clk_update(s, 1);
s->diff[0] = 0;
s->diff[1] = 0;
s->ds = 0;
s->alc = 0;
s->in[0] = &s->adc_voice[0];
s->invol[0] = 0x17;
s->invol[1] = 0x17;
s->invol[2] = 0xc3;
s->invol[3] = 0xc3;
s->out[0] = &s->dac_voice[0];
s->outvol[0] = 0xff;
s->outvol[1] = 0xff;
s->outvol[2] = 0x79;
s->outvol[3] = 0x79;
s->outvol[4] = 0x79;
s->outvol[5] = 0x79;
s->outvol[6] = 0x79;
s->inmute[0] = 0;
s->inmute[1] = 0;
s->outmute[0] = 0;
s->outmute[1] = 0;
s->mute = 1;
s->path[0] = 0;
s->path[1] = 0;
s->path[2] = 0;
s->path[3] = 0;
s->mpath[0] = 0;
s->mpath[1] = 0;
s->format = 0x0a;
s->idx_in = sizeof(s->data_in);
s->req_in = 0;
s->idx_out = 0;
s->req_out = 0;
wm8750_vol_update(s);
s->i2c_len = 0;
}
static int wm8750_event(I2CSlave *i2c, enum i2c_event event)
{
WM8750State *s = WM8750(i2c);
switch (event) {
case I2C_START_SEND:
s->i2c_len = 0;
break;
case I2C_FINISH:
#ifdef VERBOSE
if (s->i2c_len < 2)
printf("%s: message too short (%i bytes)\n",
__func__, s->i2c_len);
#endif
break;
default:
break;
}
return 0;
}
#define WM8750_LINVOL 0x00
#define WM8750_RINVOL 0x01
#define WM8750_LOUT1V 0x02
#define WM8750_ROUT1V 0x03
#define WM8750_ADCDAC 0x05
#define WM8750_IFACE 0x07
#define WM8750_SRATE 0x08
#define WM8750_LDAC 0x0a
#define WM8750_RDAC 0x0b
#define WM8750_BASS 0x0c
#define WM8750_TREBLE 0x0d
#define WM8750_RESET 0x0f
#define WM8750_3D 0x10
#define WM8750_ALC1 0x11
#define WM8750_ALC2 0x12
#define WM8750_ALC3 0x13
#define WM8750_NGATE 0x14
#define WM8750_LADC 0x15
#define WM8750_RADC 0x16
#define WM8750_ADCTL1 0x17
#define WM8750_ADCTL2 0x18
#define WM8750_PWR1 0x19
#define WM8750_PWR2 0x1a
#define WM8750_ADCTL3 0x1b
#define WM8750_ADCIN 0x1f
#define WM8750_LADCIN 0x20
#define WM8750_RADCIN 0x21
#define WM8750_LOUTM1 0x22
#define WM8750_LOUTM2 0x23
#define WM8750_ROUTM1 0x24
#define WM8750_ROUTM2 0x25
#define WM8750_MOUTM1 0x26
#define WM8750_MOUTM2 0x27
#define WM8750_LOUT2V 0x28
#define WM8750_ROUT2V 0x29
#define WM8750_MOUTV 0x2a
static int wm8750_tx(I2CSlave *i2c, uint8_t data)
{
WM8750State *s = WM8750(i2c);
uint8_t cmd;
uint16_t value;
if (s->i2c_len >= 2) {
#ifdef VERBOSE
printf("%s: long message (%i bytes)\n", __func__, s->i2c_len);
#endif
return 1;
}
s->i2c_data[s->i2c_len ++] = data;
if (s->i2c_len != 2)
return 0;
cmd = s->i2c_data[0] >> 1;
value = ((s->i2c_data[0] << 8) | s->i2c_data[1]) & 0x1ff;
switch (cmd) {
case WM8750_LADCIN: /* ADC Signal Path Control (Left) */
s->diff[0] = (((value >> 6) & 3) == 3); /* LINSEL */
if (s->diff[0])
s->in[0] = &s->adc_voice[0 + s->ds * 1];
else
s->in[0] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
break;
case WM8750_RADCIN: /* ADC Signal Path Control (Right) */
s->diff[1] = (((value >> 6) & 3) == 3); /* RINSEL */
if (s->diff[1])
s->in[1] = &s->adc_voice[0 + s->ds * 1];
else
s->in[1] = &s->adc_voice[((value >> 6) & 3) * 1 + 0];
break;
case WM8750_ADCIN: /* ADC Input Mode */
s->ds = (value >> 8) & 1; /* DS */
if (s->diff[0])
s->in[0] = &s->adc_voice[0 + s->ds * 1];
if (s->diff[1])
s->in[1] = &s->adc_voice[0 + s->ds * 1];
s->monomix[0] = (value >> 6) & 3; /* MONOMIX */
break;
case WM8750_ADCTL1: /* Additional Control (1) */
s->monomix[1] = (value >> 1) & 1; /* DMONOMIX */
break;
case WM8750_PWR1: /* Power Management (1) */
s->enable = ((value >> 6) & 7) == 3; /* VMIDSEL, VREF */
wm8750_set_format(s);
break;
case WM8750_LINVOL: /* Left Channel PGA */
s->invol[0] = value & 0x3f; /* LINVOL */
s->inmute[0] = (value >> 7) & 1; /* LINMUTE */
wm8750_vol_update(s);
break;
case WM8750_RINVOL: /* Right Channel PGA */
s->invol[1] = value & 0x3f; /* RINVOL */
s->inmute[1] = (value >> 7) & 1; /* RINMUTE */
wm8750_vol_update(s);
break;
case WM8750_ADCDAC: /* ADC and DAC Control */
s->pol = (value >> 5) & 3; /* ADCPOL */
s->mute = (value >> 3) & 1; /* DACMU */
wm8750_vol_update(s);
break;
case WM8750_ADCTL3: /* Additional Control (3) */
break;
case WM8750_LADC: /* Left ADC Digital Volume */
s->invol[2] = value & 0xff; /* LADCVOL */
wm8750_vol_update(s);
break;
case WM8750_RADC: /* Right ADC Digital Volume */
s->invol[3] = value & 0xff; /* RADCVOL */
wm8750_vol_update(s);
break;
case WM8750_ALC1: /* ALC Control (1) */
s->alc = (value >> 7) & 3; /* ALCSEL */
break;
case WM8750_NGATE: /* Noise Gate Control */
case WM8750_3D: /* 3D enhance */
break;
case WM8750_LDAC: /* Left Channel Digital Volume */
s->outvol[0] = value & 0xff; /* LDACVOL */
wm8750_vol_update(s);
break;
case WM8750_RDAC: /* Right Channel Digital Volume */
s->outvol[1] = value & 0xff; /* RDACVOL */
wm8750_vol_update(s);
break;
case WM8750_BASS: /* Bass Control */
break;
case WM8750_LOUTM1: /* Left Mixer Control (1) */
s->path[0] = (value >> 8) & 1; /* LD2LO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_LOUTM2: /* Left Mixer Control (2) */
s->path[1] = (value >> 8) & 1; /* RD2LO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_ROUTM1: /* Right Mixer Control (1) */
s->path[2] = (value >> 8) & 1; /* LD2RO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_ROUTM2: /* Right Mixer Control (2) */
s->path[3] = (value >> 8) & 1; /* RD2RO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_MOUTM1: /* Mono Mixer Control (1) */
s->mpath[0] = (value >> 8) & 1; /* LD2MO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_MOUTM2: /* Mono Mixer Control (2) */
s->mpath[1] = (value >> 8) & 1; /* RD2MO */
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_LOUT1V: /* LOUT1 Volume */
s->outvol[2] = value & 0x7f; /* LOUT1VOL */
wm8750_vol_update(s);
break;
case WM8750_LOUT2V: /* LOUT2 Volume */
s->outvol[4] = value & 0x7f; /* LOUT2VOL */
wm8750_vol_update(s);
break;
case WM8750_ROUT1V: /* ROUT1 Volume */
s->outvol[3] = value & 0x7f; /* ROUT1VOL */
wm8750_vol_update(s);
break;
case WM8750_ROUT2V: /* ROUT2 Volume */
s->outvol[5] = value & 0x7f; /* ROUT2VOL */
wm8750_vol_update(s);
break;
case WM8750_MOUTV: /* MONOOUT Volume */
s->outvol[6] = value & 0x7f; /* MONOOUTVOL */
wm8750_vol_update(s);
break;
case WM8750_ADCTL2: /* Additional Control (2) */
break;
case WM8750_PWR2: /* Power Management (2) */
s->power = value & 0x7e;
/* TODO: mute/unmute respective paths */
wm8750_vol_update(s);
break;
case WM8750_IFACE: /* Digital Audio Interface Format */
s->format = value;
s->master = (value >> 6) & 1; /* MS */
wm8750_clk_update(s, s->master);
break;
case WM8750_SRATE: /* Clocking and Sample Rate Control */
s->rate = &wm_rate_table[(value >> 1) & 0x1f];
wm8750_clk_update(s, 0);
break;
case WM8750_RESET: /* Reset */
wm8750_reset(I2C_SLAVE(s));
break;
#ifdef VERBOSE
default:
printf("%s: unknown register %02x\n", __func__, cmd);
#endif
}
return 0;
}
static uint8_t wm8750_rx(I2CSlave *i2c)
{
return 0x00;
}
static int wm8750_pre_save(void *opaque)
{
WM8750State *s = opaque;
s->rate_vmstate = s->rate - wm_rate_table;
return 0;
}
static int wm8750_post_load(void *opaque, int version_id)
{
WM8750State *s = opaque;
s->rate = &wm_rate_table[s->rate_vmstate & 0x1f];
return 0;
}
static const VMStateDescription vmstate_wm8750 = {
.name = CODEC,
.version_id = 0,
.minimum_version_id = 0,
.pre_save = wm8750_pre_save,
.post_load = wm8750_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(i2c_data, WM8750State, 2),
VMSTATE_INT32(i2c_len, WM8750State),
VMSTATE_INT32(enable, WM8750State),
VMSTATE_INT32(idx_in, WM8750State),
VMSTATE_INT32(req_in, WM8750State),
VMSTATE_INT32(idx_out, WM8750State),
VMSTATE_INT32(req_out, WM8750State),
VMSTATE_UINT8_ARRAY(outvol, WM8750State, 7),
VMSTATE_UINT8_ARRAY(outmute, WM8750State, 2),
VMSTATE_UINT8_ARRAY(invol, WM8750State, 4),
VMSTATE_UINT8_ARRAY(inmute, WM8750State, 2),
VMSTATE_UINT8_ARRAY(diff, WM8750State, 2),
VMSTATE_UINT8(pol, WM8750State),
VMSTATE_UINT8(ds, WM8750State),
VMSTATE_UINT8_ARRAY(monomix, WM8750State, 2),
VMSTATE_UINT8(alc, WM8750State),
VMSTATE_UINT8(mute, WM8750State),
VMSTATE_UINT8_ARRAY(path, WM8750State, 4),
VMSTATE_UINT8_ARRAY(mpath, WM8750State, 2),
VMSTATE_UINT8(format, WM8750State),
VMSTATE_UINT8(power, WM8750State),
VMSTATE_UINT8(rate_vmstate, WM8750State),
VMSTATE_I2C_SLAVE(parent_obj, WM8750State),
VMSTATE_END_OF_LIST()
}
};
static void wm8750_realize(DeviceState *dev, Error **errp)
{
WM8750State *s = WM8750(dev);
AUD_register_card(CODEC, &s->card);
wm8750_reset(I2C_SLAVE(s));
}
#if 0
static void wm8750_fini(I2CSlave *i2c)
{
WM8750State *s = WM8750(i2c);
wm8750_reset(I2C_SLAVE(s));
AUD_remove_card(&s->card);
g_free(s);
}
#endif
void wm8750_data_req_set(DeviceState *dev, data_req_cb *data_req, void *opaque)
{
WM8750State *s = WM8750(dev);
s->data_req = data_req;
s->opaque = opaque;
}
void wm8750_dac_dat(void *opaque, uint32_t sample)
{
WM8750State *s = (WM8750State *) opaque;
*(uint32_t *) &s->data_out[s->idx_out] = sample;
s->req_out -= 4;
s->idx_out += 4;
if (s->idx_out >= sizeof(s->data_out) || s->req_out <= 0)
wm8750_out_flush(s);
}
void *wm8750_dac_buffer(void *opaque, int samples)
{
WM8750State *s = (WM8750State *) opaque;
/* XXX: Should check if there are <i>samples</i> free samples available */
void *ret = s->data_out + s->idx_out;
s->idx_out += samples << 2;
s->req_out -= samples << 2;
return ret;
}
void wm8750_dac_commit(void *opaque)
{
WM8750State *s = (WM8750State *) opaque;
wm8750_out_flush(s);
}
uint32_t wm8750_adc_dat(void *opaque)
{
WM8750State *s = (WM8750State *) opaque;
uint32_t *data;
if (s->idx_in >= sizeof(s->data_in)) {
wm8750_in_load(s);
if (s->idx_in >= sizeof(s->data_in)) {
return 0x80008000; /* silence in AUD_FMT_S16 sample format */
}
}
data = (uint32_t *) &s->data_in[s->idx_in];
s->req_in -= 4;
s->idx_in += 4;
return *data;
}
void wm8750_set_bclk_in(void *opaque, int new_hz)
{
WM8750State *s = (WM8750State *) opaque;
s->ext_adc_hz = new_hz;
s->ext_dac_hz = new_hz;
wm8750_clk_update(s, 1);
}
static void wm8750_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
dc->realize = wm8750_realize;
sc->event = wm8750_event;
sc->recv = wm8750_rx;
sc->send = wm8750_tx;
dc->vmsd = &vmstate_wm8750;
}
static const TypeInfo wm8750_info = {
.name = TYPE_WM8750,
.parent = TYPE_I2C_SLAVE,
.instance_size = sizeof(WM8750State),
.class_init = wm8750_class_init,
};
static void wm8750_register_types(void)
{
type_register_static(&wm8750_info);
}
type_init(wm8750_register_types)
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