/* * WM8750 audio CODEC. * * Copyright (c) 2006 Openedhand Ltd. * Written by Andrzej Zaborowski * * This file is licensed under GNU GPL. */ #include "qemu/osdep.h" #include "hw/i2c/i2c.h" #include "migration/vmstate.h" #include "qemu/module.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 = AUDIO_FORMAT_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 = AUDIO_FORMAT_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 samples 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 AUDIO_FORMAT_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)