/* * ALSA driver for ICEnsemble VT17xx * * Lowlevel functions for WM8776 codec * * Copyright (c) 2012 Ondrej Zary * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include "wm8776.h" /* low-level access */ static void snd_wm8776_write(struct snd_wm8776 *wm, u16 addr, u16 data) { u8 bus_addr = addr << 1 | data >> 8; /* addr + 9th data bit */ u8 bus_data = data & 0xff; /* remaining 8 data bits */ if (addr < WM8776_REG_RESET) wm->regs[addr] = data; wm->ops.write(wm, bus_addr, bus_data); } /* register-level functions */ static void snd_wm8776_activate_ctl(struct snd_wm8776 *wm, char *ctl_name, bool active) { struct snd_card *card = wm->card; struct snd_kcontrol *kctl; struct snd_kcontrol_volatile *vd; struct snd_ctl_elem_id elem_id; unsigned int index_offset; memset(&elem_id, 0, sizeof(elem_id)); strncpy(elem_id.name, ctl_name, sizeof(elem_id.name)); elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER; kctl = snd_ctl_find_id(card, &elem_id); if (!kctl) return; index_offset = snd_ctl_get_ioff(kctl, &kctl->id); vd = &kctl->vd[index_offset]; if (active) vd->access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE; else vd->access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO, &kctl->id); } static void snd_wm8776_update_agc_ctl(struct snd_wm8776 *wm) { int i, flags_on = 0, flags_off = 0; switch (wm->agc_mode) { case WM8776_AGC_OFF: flags_off = WM8776_FLAG_LIM | WM8776_FLAG_ALC; break; case WM8776_AGC_LIM: flags_off = WM8776_FLAG_ALC; flags_on = WM8776_FLAG_LIM; break; case WM8776_AGC_ALC_R: case WM8776_AGC_ALC_L: case WM8776_AGC_ALC_STEREO: flags_off = WM8776_FLAG_LIM; flags_on = WM8776_FLAG_ALC; break; } for (i = 0; i < WM8776_CTL_COUNT; i++) if (wm->ctl[i].flags & flags_off) snd_wm8776_activate_ctl(wm, wm->ctl[i].name, false); else if (wm->ctl[i].flags & flags_on) snd_wm8776_activate_ctl(wm, wm->ctl[i].name, true); } static void snd_wm8776_set_agc(struct snd_wm8776 *wm, u16 agc, u16 nothing) { u16 alc1 = wm->regs[WM8776_REG_ALCCTRL1] & ~WM8776_ALC1_LCT_MASK; u16 alc2 = wm->regs[WM8776_REG_ALCCTRL2] & ~WM8776_ALC2_LCEN; switch (agc) { case 0: /* Off */ wm->agc_mode = WM8776_AGC_OFF; break; case 1: /* Limiter */ alc2 |= WM8776_ALC2_LCEN; wm->agc_mode = WM8776_AGC_LIM; break; case 2: /* ALC Right */ alc1 |= WM8776_ALC1_LCSEL_ALCR; alc2 |= WM8776_ALC2_LCEN; wm->agc_mode = WM8776_AGC_ALC_R; break; case 3: /* ALC Left */ alc1 |= WM8776_ALC1_LCSEL_ALCL; alc2 |= WM8776_ALC2_LCEN; wm->agc_mode = WM8776_AGC_ALC_L; break; case 4: /* ALC Stereo */ alc1 |= WM8776_ALC1_LCSEL_ALCSTEREO; alc2 |= WM8776_ALC2_LCEN; wm->agc_mode = WM8776_AGC_ALC_STEREO; break; } snd_wm8776_write(wm, WM8776_REG_ALCCTRL1, alc1); snd_wm8776_write(wm, WM8776_REG_ALCCTRL2, alc2); snd_wm8776_update_agc_ctl(wm); } static void snd_wm8776_get_agc(struct snd_wm8776 *wm, u16 *mode, u16 *nothing) { *mode = wm->agc_mode; } /* mixer controls */ static const DECLARE_TLV_DB_SCALE(wm8776_hp_tlv, -7400, 100, 1); static const DECLARE_TLV_DB_SCALE(wm8776_dac_tlv, -12750, 50, 1); static const DECLARE_TLV_DB_SCALE(wm8776_adc_tlv, -10350, 50, 1); static const DECLARE_TLV_DB_SCALE(wm8776_lct_tlv, -1600, 100, 0); static const DECLARE_TLV_DB_SCALE(wm8776_maxgain_tlv, 0, 400, 0); static const DECLARE_TLV_DB_SCALE(wm8776_ngth_tlv, -7800, 600, 0); static const DECLARE_TLV_DB_SCALE(wm8776_maxatten_lim_tlv, -1200, 100, 0); static const DECLARE_TLV_DB_SCALE(wm8776_maxatten_alc_tlv, -2100, 400, 0); static struct snd_wm8776_ctl snd_wm8776_default_ctl[WM8776_CTL_COUNT] = { [WM8776_CTL_DAC_VOL] = { .name = "Master Playback Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_dac_tlv, .reg1 = WM8776_REG_DACLVOL, .reg2 = WM8776_REG_DACRVOL, .mask1 = WM8776_DACVOL_MASK, .mask2 = WM8776_DACVOL_MASK, .max = 0xff, .flags = WM8776_FLAG_STEREO | WM8776_FLAG_VOL_UPDATE, }, [WM8776_CTL_DAC_SW] = { .name = "Master Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_DACCTRL1, .reg2 = WM8776_REG_DACCTRL1, .mask1 = WM8776_DAC_PL_LL, .mask2 = WM8776_DAC_PL_RR, .flags = WM8776_FLAG_STEREO, }, [WM8776_CTL_DAC_ZC_SW] = { .name = "Master Zero Cross Detect Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_DACCTRL1, .mask1 = WM8776_DAC_DZCEN, }, [WM8776_CTL_HP_VOL] = { .name = "Headphone Playback Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_hp_tlv, .reg1 = WM8776_REG_HPLVOL, .reg2 = WM8776_REG_HPRVOL, .mask1 = WM8776_HPVOL_MASK, .mask2 = WM8776_HPVOL_MASK, .min = 0x2f, .max = 0x7f, .flags = WM8776_FLAG_STEREO | WM8776_FLAG_VOL_UPDATE, }, [WM8776_CTL_HP_SW] = { .name = "Headphone Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_PWRDOWN, .mask1 = WM8776_PWR_HPPD, .flags = WM8776_FLAG_INVERT, }, [WM8776_CTL_HP_ZC_SW] = { .name = "Headphone Zero Cross Detect Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_HPLVOL, .reg2 = WM8776_REG_HPRVOL, .mask1 = WM8776_VOL_HPZCEN, .mask2 = WM8776_VOL_HPZCEN, .flags = WM8776_FLAG_STEREO, }, [WM8776_CTL_AUX_SW] = { .name = "AUX Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_OUTMUX, .mask1 = WM8776_OUTMUX_AUX, }, [WM8776_CTL_BYPASS_SW] = { .name = "Bypass Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_OUTMUX, .mask1 = WM8776_OUTMUX_BYPASS, }, [WM8776_CTL_DAC_IZD_SW] = { .name = "Infinite Zero Detect Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_DACCTRL1, .mask1 = WM8776_DAC_IZD, }, [WM8776_CTL_PHASE_SW] = { .name = "Phase Invert Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_PHASESWAP, .reg2 = WM8776_REG_PHASESWAP, .mask1 = WM8776_PHASE_INVERTL, .mask2 = WM8776_PHASE_INVERTR, .flags = WM8776_FLAG_STEREO, }, [WM8776_CTL_DEEMPH_SW] = { .name = "Deemphasis Playback Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_DACCTRL2, .mask1 = WM8776_DAC2_DEEMPH, }, [WM8776_CTL_ADC_VOL] = { .name = "Input Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_adc_tlv, .reg1 = WM8776_REG_ADCLVOL, .reg2 = WM8776_REG_ADCRVOL, .mask1 = WM8776_ADC_GAIN_MASK, .mask2 = WM8776_ADC_GAIN_MASK, .max = 0xff, .flags = WM8776_FLAG_STEREO | WM8776_FLAG_VOL_UPDATE, }, [WM8776_CTL_ADC_SW] = { .name = "Input Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .reg2 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUTEL, .mask2 = WM8776_ADC_MUTER, .flags = WM8776_FLAG_STEREO | WM8776_FLAG_INVERT, }, [WM8776_CTL_INPUT1_SW] = { .name = "AIN1 Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUX_AIN1, }, [WM8776_CTL_INPUT2_SW] = { .name = "AIN2 Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUX_AIN2, }, [WM8776_CTL_INPUT3_SW] = { .name = "AIN3 Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUX_AIN3, }, [WM8776_CTL_INPUT4_SW] = { .name = "AIN4 Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUX_AIN4, }, [WM8776_CTL_INPUT5_SW] = { .name = "AIN5 Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_ADCMUX, .mask1 = WM8776_ADC_MUX_AIN5, }, [WM8776_CTL_AGC_SEL] = { .name = "AGC Select Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "Off", "Limiter", "ALC Right", "ALC Left", "ALC Stereo" }, .max = 5, /* .enum_names item count */ .set = snd_wm8776_set_agc, .get = snd_wm8776_get_agc, }, [WM8776_CTL_LIM_THR] = { .name = "Limiter Threshold Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_lct_tlv, .reg1 = WM8776_REG_ALCCTRL1, .mask1 = WM8776_ALC1_LCT_MASK, .max = 15, .flags = WM8776_FLAG_LIM, }, [WM8776_CTL_LIM_ATK] = { .name = "Limiter Attack Time Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "0.25 ms", "0.5 ms", "1 ms", "2 ms", "4 ms", "8 ms", "16 ms", "32 ms", "64 ms", "128 ms", "256 ms" }, .max = 11, /* .enum_names item count */ .reg1 = WM8776_REG_ALCCTRL3, .mask1 = WM8776_ALC3_ATK_MASK, .flags = WM8776_FLAG_LIM, }, [WM8776_CTL_LIM_DCY] = { .name = "Limiter Decay Time Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "1.2 ms", "2.4 ms", "4.8 ms", "9.6 ms", "19.2 ms", "38.4 ms", "76.8 ms", "154 ms", "307 ms", "614 ms", "1.23 s" }, .max = 11, /* .enum_names item count */ .reg1 = WM8776_REG_ALCCTRL3, .mask1 = WM8776_ALC3_DCY_MASK, .flags = WM8776_FLAG_LIM, }, [WM8776_CTL_LIM_TRANWIN] = { .name = "Limiter Transient Window Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "0 us", "62.5 us", "125 us", "250 us", "500 us", "1 ms", "2 ms", "4 ms" }, .max = 8, /* .enum_names item count */ .reg1 = WM8776_REG_LIMITER, .mask1 = WM8776_LIM_TRANWIN_MASK, .flags = WM8776_FLAG_LIM, }, [WM8776_CTL_LIM_MAXATTN] = { .name = "Limiter Maximum Attenuation Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_maxatten_lim_tlv, .reg1 = WM8776_REG_LIMITER, .mask1 = WM8776_LIM_MAXATTEN_MASK, .min = 3, .max = 12, .flags = WM8776_FLAG_LIM | WM8776_FLAG_INVERT, }, [WM8776_CTL_ALC_TGT] = { .name = "ALC Target Level Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_lct_tlv, .reg1 = WM8776_REG_ALCCTRL1, .mask1 = WM8776_ALC1_LCT_MASK, .max = 15, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_ALC_ATK] = { .name = "ALC Attack Time Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "8.40 ms", "16.8 ms", "33.6 ms", "67.2 ms", "134 ms", "269 ms", "538 ms", "1.08 s", "2.15 s", "4.3 s", "8.6 s" }, .max = 11, /* .enum_names item count */ .reg1 = WM8776_REG_ALCCTRL3, .mask1 = WM8776_ALC3_ATK_MASK, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_ALC_DCY] = { .name = "ALC Decay Time Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "33.5 ms", "67.0 ms", "134 ms", "268 ms", "536 ms", "1.07 s", "2.14 s", "4.29 s", "8.58 s", "17.2 s", "34.3 s" }, .max = 11, /* .enum_names item count */ .reg1 = WM8776_REG_ALCCTRL3, .mask1 = WM8776_ALC3_DCY_MASK, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_ALC_MAXGAIN] = { .name = "ALC Maximum Gain Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_maxgain_tlv, .reg1 = WM8776_REG_ALCCTRL1, .mask1 = WM8776_ALC1_MAXGAIN_MASK, .min = 1, .max = 7, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_ALC_MAXATTN] = { .name = "ALC Maximum Attenuation Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_maxatten_alc_tlv, .reg1 = WM8776_REG_LIMITER, .mask1 = WM8776_LIM_MAXATTEN_MASK, .min = 10, .max = 15, .flags = WM8776_FLAG_ALC | WM8776_FLAG_INVERT, }, [WM8776_CTL_ALC_HLD] = { .name = "ALC Hold Time Capture Enum", .type = SNDRV_CTL_ELEM_TYPE_ENUMERATED, .enum_names = { "0 ms", "2.67 ms", "5.33 ms", "10.6 ms", "21.3 ms", "42.7 ms", "85.3 ms", "171 ms", "341 ms", "683 ms", "1.37 s", "2.73 s", "5.46 s", "10.9 s", "21.8 s", "43.7 s" }, .max = 16, /* .enum_names item count */ .reg1 = WM8776_REG_ALCCTRL2, .mask1 = WM8776_ALC2_HOLD_MASK, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_NGT_SW] = { .name = "Noise Gate Capture Switch", .type = SNDRV_CTL_ELEM_TYPE_BOOLEAN, .reg1 = WM8776_REG_NOISEGATE, .mask1 = WM8776_NGAT_ENABLE, .flags = WM8776_FLAG_ALC, }, [WM8776_CTL_NGT_THR] = { .name = "Noise Gate Threshold Capture Volume", .type = SNDRV_CTL_ELEM_TYPE_INTEGER, .tlv = wm8776_ngth_tlv, .reg1 = WM8776_REG_NOISEGATE, .mask1 = WM8776_NGAT_THR_MASK, .max = 7, .flags = WM8776_FLAG_ALC, }, }; /* exported functions */ void snd_wm8776_init(struct snd_wm8776 *wm) { int i; static const u16 default_values[] = { 0x000, 0x100, 0x000, 0x000, 0x100, 0x000, 0x000, 0x090, 0x000, 0x000, 0x022, 0x022, 0x022, 0x008, 0x0cf, 0x0cf, 0x07b, 0x000, 0x032, 0x000, 0x0a6, 0x001, 0x001 }; memcpy(wm->ctl, snd_wm8776_default_ctl, sizeof(wm->ctl)); snd_wm8776_write(wm, WM8776_REG_RESET, 0x00); /* reset */ udelay(10); /* load defaults */ for (i = 0; i < ARRAY_SIZE(default_values); i++) snd_wm8776_write(wm, i, default_values[i]); } void snd_wm8776_resume(struct snd_wm8776 *wm) { int i; for (i = 0; i < WM8776_REG_COUNT; i++) snd_wm8776_write(wm, i, wm->regs[i]); } void snd_wm8776_set_dac_if(struct snd_wm8776 *wm, u16 dac) { snd_wm8776_write(wm, WM8776_REG_DACIFCTRL, dac); } void snd_wm8776_set_adc_if(struct snd_wm8776 *wm, u16 adc) { snd_wm8776_write(wm, WM8776_REG_ADCIFCTRL, adc); } void snd_wm8776_set_master_mode(struct snd_wm8776 *wm, u16 mode) { snd_wm8776_write(wm, WM8776_REG_MSTRCTRL, mode); } void snd_wm8776_set_power(struct snd_wm8776 *wm, u16 power) { snd_wm8776_write(wm, WM8776_REG_PWRDOWN, power); } void snd_wm8776_volume_restore(struct snd_wm8776 *wm) { u16 val = wm->regs[WM8776_REG_DACRVOL]; /* restore volume after MCLK stopped */ snd_wm8776_write(wm, WM8776_REG_DACRVOL, val | WM8776_VOL_UPDATE); } /* mixer callbacks */ static int snd_wm8776_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct snd_wm8776 *wm = snd_kcontrol_chip(kcontrol); int n = kcontrol->private_value; uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = (wm->ctl[n].flags & WM8776_FLAG_STEREO) ? 2 : 1; uinfo->value.integer.min = wm->ctl[n].min; uinfo->value.integer.max = wm->ctl[n].max; return 0; } static int snd_wm8776_enum_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct snd_wm8776 *wm = snd_kcontrol_chip(kcontrol); int n = kcontrol->private_value; return snd_ctl_enum_info(uinfo, 1, wm->ctl[n].max, wm->ctl[n].enum_names); } static int snd_wm8776_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_wm8776 *wm = snd_kcontrol_chip(kcontrol); int n = kcontrol->private_value; u16 val1, val2; if (wm->ctl[n].get) wm->ctl[n].get(wm, &val1, &val2); else { val1 = wm->regs[wm->ctl[n].reg1] & wm->ctl[n].mask1; val1 >>= __ffs(wm->ctl[n].mask1); if (wm->ctl[n].flags & WM8776_FLAG_STEREO) { val2 = wm->regs[wm->ctl[n].reg2] & wm->ctl[n].mask2; val2 >>= __ffs(wm->ctl[n].mask2); if (wm->ctl[n].flags & WM8776_FLAG_VOL_UPDATE) val2 &= ~WM8776_VOL_UPDATE; } } if (wm->ctl[n].flags & WM8776_FLAG_INVERT) { val1 = wm->ctl[n].max - (val1 - wm->ctl[n].min); val2 = wm->ctl[n].max - (val2 - wm->ctl[n].min); } ucontrol->value.integer.value[0] = val1; if (wm->ctl[n].flags & WM8776_FLAG_STEREO) ucontrol->value.integer.value[1] = val2; return 0; } static int snd_wm8776_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_wm8776 *wm = snd_kcontrol_chip(kcontrol); int n = kcontrol->private_value; u16 val, regval1, regval2; /* this also works for enum because value is an union */ regval1 = ucontrol->value.integer.value[0]; regval2 = ucontrol->value.integer.value[1]; if (wm->ctl[n].flags & WM8776_FLAG_INVERT) { regval1 = wm->ctl[n].max - (regval1 - wm->ctl[n].min); regval2 = wm->ctl[n].max - (regval2 - wm->ctl[n].min); } if (wm->ctl[n].set) wm->ctl[n].set(wm, regval1, regval2); else { val = wm->regs[wm->ctl[n].reg1] & ~wm->ctl[n].mask1; val |= regval1 << __ffs(wm->ctl[n].mask1); /* both stereo controls in one register */ if (wm->ctl[n].flags & WM8776_FLAG_STEREO && wm->ctl[n].reg1 == wm->ctl[n].reg2) { val &= ~wm->ctl[n].mask2; val |= regval2 << __ffs(wm->ctl[n].mask2); } snd_wm8776_write(wm, wm->ctl[n].reg1, val); /* stereo controls in different registers */ if (wm->ctl[n].flags & WM8776_FLAG_STEREO && wm->ctl[n].reg1 != wm->ctl[n].reg2) { val = wm->regs[wm->ctl[n].reg2] & ~wm->ctl[n].mask2; val |= regval2 << __ffs(wm->ctl[n].mask2); if (wm->ctl[n].flags & WM8776_FLAG_VOL_UPDATE) val |= WM8776_VOL_UPDATE; snd_wm8776_write(wm, wm->ctl[n].reg2, val); } } return 0; } static int snd_wm8776_add_control(struct snd_wm8776 *wm, int num) { struct snd_kcontrol_new cont; struct snd_kcontrol *ctl; memset(&cont, 0, sizeof(cont)); cont.iface = SNDRV_CTL_ELEM_IFACE_MIXER; cont.private_value = num; cont.name = wm->ctl[num].name; cont.access = SNDRV_CTL_ELEM_ACCESS_READWRITE; if (wm->ctl[num].flags & WM8776_FLAG_LIM || wm->ctl[num].flags & WM8776_FLAG_ALC) cont.access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE; cont.tlv.p = NULL; cont.get = snd_wm8776_ctl_get; cont.put = snd_wm8776_ctl_put; switch (wm->ctl[num].type) { case SNDRV_CTL_ELEM_TYPE_INTEGER: cont.info = snd_wm8776_volume_info; cont.access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ; cont.tlv.p = wm->ctl[num].tlv; break; case SNDRV_CTL_ELEM_TYPE_BOOLEAN: wm->ctl[num].max = 1; if (wm->ctl[num].flags & WM8776_FLAG_STEREO) cont.info = snd_ctl_boolean_stereo_info; else cont.info = snd_ctl_boolean_mono_info; break; case SNDRV_CTL_ELEM_TYPE_ENUMERATED: cont.info = snd_wm8776_enum_info; break; default: return -EINVAL; } ctl = snd_ctl_new1(&cont, wm); if (!ctl) return -ENOMEM; return snd_ctl_add(wm->card, ctl); } int snd_wm8776_build_controls(struct snd_wm8776 *wm) { int err, i; for (i = 0; i < WM8776_CTL_COUNT; i++) if (wm->ctl[i].name) { err = snd_wm8776_add_control(wm, i); if (err < 0) return err; } return 0; }