diff options
Diffstat (limited to 'hw/audio/wm8750.c')
| -rw-r--r-- | hw/audio/wm8750.c | 716 |
1 files changed, 716 insertions, 0 deletions
diff --git a/hw/audio/wm8750.c b/hw/audio/wm8750.c new file mode 100644 index 0000000000..6b5a3499bb --- /dev/null +++ b/hw/audio/wm8750.c @@ -0,0 +1,716 @@ +/* + * WM8750 audio CODEC. + * + * Copyright (c) 2006 Openedhand Ltd. + * Written by Andrzej Zaborowski <balrog@zabor.org> + * + * This file is licensed under GNU GPL. + */ + +#include "hw/hw.h" +#include "hw/i2c/i2c.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; + +typedef struct { + I2CSlave i2c; + 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 = (WM8750State *) 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 void wm8750_event(I2CSlave *i2c, enum i2c_event event) +{ + WM8750State *s = (WM8750State *) 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", + __FUNCTION__, s->i2c_len); +#endif + break; + default: + break; + } +} + +#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 = (WM8750State *) 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(&s->i2c); + break; + +#ifdef VERBOSE + default: + printf("%s: unknown register %02x\n", __FUNCTION__, cmd); +#endif + } + + return 0; +} + +static int wm8750_rx(I2CSlave *i2c) +{ + return 0x00; +} + +static void wm8750_pre_save(void *opaque) +{ + WM8750State *s = opaque; + + s->rate_vmstate = s->rate - wm_rate_table; +} + +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, + .minimum_version_id_old = 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(i2c, WM8750State), + VMSTATE_END_OF_LIST() + } +}; + +static int wm8750_init(I2CSlave *i2c) +{ + WM8750State *s = FROM_I2C_SLAVE(WM8750State, i2c); + + AUD_register_card(CODEC, &s->card); + wm8750_reset(&s->i2c); + + return 0; +} + +#if 0 +static void wm8750_fini(I2CSlave *i2c) +{ + WM8750State *s = (WM8750State *) i2c; + wm8750_reset(&s->i2c); + AUD_remove_card(&s->card); + g_free(s); +} +#endif + +void wm8750_data_req_set(DeviceState *dev, + void (*data_req)(void *, int, int), void *opaque) +{ + WM8750State *s = FROM_I2C_SLAVE(WM8750State, I2C_SLAVE(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); + + 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); + + sc->init = wm8750_init; + sc->event = wm8750_event; + sc->recv = wm8750_rx; + sc->send = wm8750_tx; + dc->vmsd = &vmstate_wm8750; +} + +static const TypeInfo wm8750_info = { + .name = "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) |