/* * wm8958-dsp2.c -- WM8958 DSP2 support * * Copyright 2011 Wolfson Microelectronics plc * * Author: Mark Brown * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "wm8994.h" static void wm8958_mbc_apply(struct snd_soc_codec *codec, int mbc, int start) { struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); struct wm8994_pdata *pdata = wm8994->pdata; int pwr_reg = snd_soc_read(codec, WM8994_POWER_MANAGEMENT_5); int ena, reg, aif, i; switch (mbc) { case 0: pwr_reg &= (WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA); aif = 0; break; case 1: pwr_reg &= (WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA); aif = 0; break; case 2: pwr_reg &= (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA); aif = 1; break; default: BUG(); return; } /* We can only enable the MBC if the AIF is enabled and we * want it to be enabled. */ ena = pwr_reg && wm8994->mbc_ena[mbc]; reg = snd_soc_read(codec, WM8958_DSP2_PROGRAM); dev_dbg(codec->dev, "MBC %d startup: %d, power: %x, DSP: %x\n", mbc, start, pwr_reg, reg); if (start && ena) { /* If the DSP is already running then noop */ if (reg & WM8958_DSP2_ENA) return; /* Switch the clock over to the appropriate AIF */ snd_soc_update_bits(codec, WM8994_CLOCKING_1, WM8958_DSP2CLK_SRC | WM8958_DSP2CLK_ENA, aif << WM8958_DSP2CLK_SRC_SHIFT | WM8958_DSP2CLK_ENA); snd_soc_update_bits(codec, WM8958_DSP2_PROGRAM, WM8958_DSP2_ENA, WM8958_DSP2_ENA); /* If we've got user supplied MBC settings use them */ if (pdata && pdata->num_mbc_cfgs) { struct wm8958_mbc_cfg *cfg = &pdata->mbc_cfgs[wm8994->mbc_cfg]; for (i = 0; i < ARRAY_SIZE(cfg->coeff_regs); i++) snd_soc_write(codec, i + WM8958_MBC_BAND_1_K_1, cfg->coeff_regs[i]); for (i = 0; i < ARRAY_SIZE(cfg->cutoff_regs); i++) snd_soc_write(codec, i + WM8958_MBC_BAND_2_LOWER_CUTOFF_C1_1, cfg->cutoff_regs[i]); } /* Run the DSP */ snd_soc_write(codec, WM8958_DSP2_EXECCONTROL, WM8958_DSP2_RUNR); /* And we're off! */ snd_soc_update_bits(codec, WM8958_DSP2_CONFIG, WM8958_MBC_ENA | WM8958_MBC_SEL_MASK, mbc << WM8958_MBC_SEL_SHIFT | WM8958_MBC_ENA); } else { /* If the DSP is already stopped then noop */ if (!(reg & WM8958_DSP2_ENA)) return; snd_soc_update_bits(codec, WM8958_DSP2_CONFIG, WM8958_MBC_ENA, 0); snd_soc_update_bits(codec, WM8958_DSP2_PROGRAM, WM8958_DSP2_ENA, 0); snd_soc_update_bits(codec, WM8994_CLOCKING_1, WM8958_DSP2CLK_ENA, 0); } } int wm8958_aif_ev(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_codec *codec = w->codec; int mbc; switch (w->shift) { case 13: case 12: mbc = 2; break; case 11: case 10: mbc = 1; break; case 9: case 8: mbc = 0; break; default: BUG(); return -EINVAL; } switch (event) { case SND_SOC_DAPM_POST_PMU: wm8958_mbc_apply(codec, mbc, 1); break; case SND_SOC_DAPM_POST_PMD: wm8958_mbc_apply(codec, mbc, 0); break; } return 0; } static int wm8958_put_mbc_enum(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); struct wm8994_pdata *pdata = wm8994->pdata; int value = ucontrol->value.integer.value[0]; int reg; /* Don't allow on the fly reconfiguration */ reg = snd_soc_read(codec, WM8994_CLOCKING_1); if (reg < 0 || reg & WM8958_DSP2CLK_ENA) return -EBUSY; if (value >= pdata->num_mbc_cfgs) return -EINVAL; wm8994->mbc_cfg = value; return 0; } static int wm8958_get_mbc_enum(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); ucontrol->value.enumerated.item[0] = wm8994->mbc_cfg; return 0; } static int wm8958_mbc_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; uinfo->count = 1; uinfo->value.integer.min = 0; uinfo->value.integer.max = 1; return 0; } static int wm8958_mbc_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { int mbc = kcontrol->private_value; struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); ucontrol->value.integer.value[0] = wm8994->mbc_ena[mbc]; return 0; } static int wm8958_mbc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { int mbc = kcontrol->private_value; int i; struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); if (ucontrol->value.integer.value[0] > 1) return -EINVAL; for (i = 0; i < ARRAY_SIZE(wm8994->mbc_ena); i++) { if (mbc != i && wm8994->mbc_ena[i]) { dev_dbg(codec->dev, "MBC %d active already\n", mbc); return -EBUSY; } } wm8994->mbc_ena[mbc] = ucontrol->value.integer.value[0]; wm8958_mbc_apply(codec, mbc, wm8994->mbc_ena[mbc]); return 0; } #define WM8958_MBC_SWITCH(xname, xval) {\ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,\ .info = wm8958_mbc_info, \ .get = wm8958_mbc_get, .put = wm8958_mbc_put, \ .private_value = xval } static const struct snd_kcontrol_new wm8958_mbc_snd_controls[] = { WM8958_MBC_SWITCH("AIF1DAC1 MBC Switch", 0), WM8958_MBC_SWITCH("AIF1DAC2 MBC Switch", 1), WM8958_MBC_SWITCH("AIF2DAC MBC Switch", 2), }; void wm8958_dsp2_init(struct snd_soc_codec *codec) { struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec); struct wm8994_pdata *pdata = wm8994->pdata; int ret, i; snd_soc_add_controls(codec, wm8958_mbc_snd_controls, ARRAY_SIZE(wm8958_mbc_snd_controls)); if (!pdata) return; if (pdata->num_mbc_cfgs) { struct snd_kcontrol_new control[] = { SOC_ENUM_EXT("MBC Mode", wm8994->mbc_enum, wm8958_get_mbc_enum, wm8958_put_mbc_enum), }; /* We need an array of texts for the enum API */ wm8994->mbc_texts = kmalloc(sizeof(char *) * pdata->num_mbc_cfgs, GFP_KERNEL); if (!wm8994->mbc_texts) { dev_err(wm8994->codec->dev, "Failed to allocate %d MBC config texts\n", pdata->num_mbc_cfgs); return; } for (i = 0; i < pdata->num_mbc_cfgs; i++) wm8994->mbc_texts[i] = pdata->mbc_cfgs[i].name; wm8994->mbc_enum.max = pdata->num_mbc_cfgs; wm8994->mbc_enum.texts = wm8994->mbc_texts; ret = snd_soc_add_controls(wm8994->codec, control, 1); if (ret != 0) dev_err(wm8994->codec->dev, "Failed to add MBC mode controls: %d\n", ret); } }