// SPDX-License-Identifier: GPL-2.0 /* * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver * * Copyright 2017 NXP */ #include #include #include #include #include #include #include "fsl_audmix.h" #define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \ SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts) static const char *tdm_sel[] = { "TDM1", "TDM2", }, *mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", }, *width_sel[] = { "16b", "18b", "20b", "24b", "32b", }, *endis_sel[] = { "Disabled", "Enabled", }, *updn_sel[] = { "Downward", "Upward", }, *mask_sel[] = { "Unmask", "Mask", }; static const struct soc_enum fsl_audmix_enum[] = { /* FSL_AUDMIX_CTR enums */ SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MIXCLK_SHIFT, tdm_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTSRC_SHIFT, mode_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTWIDTH_SHIFT, width_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKRTDF_SHIFT, mask_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKCKDF_SHIFT, mask_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCMODE_SHIFT, endis_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCSRC_SHIFT, tdm_sel), /* FSL_AUDMIX_ATCR0 enums */ SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 0, endis_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 1, updn_sel), /* FSL_AUDMIX_ATCR1 enums */ SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 0, endis_sel), SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 1, updn_sel), }; struct fsl_audmix_state { u8 tdms; u8 clk; char msg[64]; }; static const struct fsl_audmix_state prms[4][4] = {{ /* DIS->DIS, do nothing */ { .tdms = 0, .clk = 0, .msg = "" }, /* DIS->TDM1*/ { .tdms = 1, .clk = 1, .msg = "DIS->TDM1: TDM1 not started!\n" }, /* DIS->TDM2*/ { .tdms = 2, .clk = 2, .msg = "DIS->TDM2: TDM2 not started!\n" }, /* DIS->MIX */ { .tdms = 3, .clk = 0, .msg = "DIS->MIX: Please start both TDMs!\n" } }, { /* TDM1->DIS */ { .tdms = 1, .clk = 0, .msg = "TDM1->DIS: TDM1 not started!\n" }, /* TDM1->TDM1, do nothing */ { .tdms = 0, .clk = 0, .msg = "" }, /* TDM1->TDM2 */ { .tdms = 3, .clk = 2, .msg = "TDM1->TDM2: Please start both TDMs!\n" }, /* TDM1->MIX */ { .tdms = 3, .clk = 0, .msg = "TDM1->MIX: Please start both TDMs!\n" } }, { /* TDM2->DIS */ { .tdms = 2, .clk = 0, .msg = "TDM2->DIS: TDM2 not started!\n" }, /* TDM2->TDM1 */ { .tdms = 3, .clk = 1, .msg = "TDM2->TDM1: Please start both TDMs!\n" }, /* TDM2->TDM2, do nothing */ { .tdms = 0, .clk = 0, .msg = "" }, /* TDM2->MIX */ { .tdms = 3, .clk = 0, .msg = "TDM2->MIX: Please start both TDMs!\n" } }, { /* MIX->DIS */ { .tdms = 3, .clk = 0, .msg = "MIX->DIS: Please start both TDMs!\n" }, /* MIX->TDM1 */ { .tdms = 3, .clk = 1, .msg = "MIX->TDM1: Please start both TDMs!\n" }, /* MIX->TDM2 */ { .tdms = 3, .clk = 2, .msg = "MIX->TDM2: Please start both TDMs!\n" }, /* MIX->MIX, do nothing */ { .tdms = 0, .clk = 0, .msg = "" } }, }; static int fsl_audmix_state_trans(struct snd_soc_component *comp, unsigned int *mask, unsigned int *ctr, const struct fsl_audmix_state prm) { struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); /* Enforce all required TDMs are started */ if ((priv->tdms & prm.tdms) != prm.tdms) { dev_dbg(comp->dev, "%s", prm.msg); return -EINVAL; } switch (prm.clk) { case 1: case 2: /* Set mix clock */ (*mask) |= FSL_AUDMIX_CTR_MIXCLK_MASK; (*ctr) |= FSL_AUDMIX_CTR_MIXCLK(prm.clk - 1); break; default: break; } return 0; } static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int *item = ucontrol->value.enumerated.item; unsigned int reg_val, val, mix_clk; /* Get current state */ reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR); mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK) >> FSL_AUDMIX_CTR_MIXCLK_SHIFT); val = snd_soc_enum_item_to_val(e, item[0]); dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val); /** * Ensure the current selected mixer clock is available * for configuration propagation */ if (!(priv->tdms & BIT(mix_clk))) { dev_err(comp->dev, "Started TDM%d needed for config propagation!\n", mix_clk + 1); return -EINVAL; } if (!(priv->tdms & BIT(val))) { dev_err(comp->dev, "The selected clock source has no TDM%d enabled!\n", val + 1); return -EINVAL; } return snd_soc_put_enum_double(kcontrol, ucontrol); } static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol); struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp); struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; unsigned int *item = ucontrol->value.enumerated.item; u32 out_src, mix_clk; unsigned int reg_val, val, mask = 0, ctr = 0; int ret; /* Get current state */ reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR); /* "From" state */ out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK) >> FSL_AUDMIX_CTR_OUTSRC_SHIFT); mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK) >> FSL_AUDMIX_CTR_MIXCLK_SHIFT); /* "To" state */ val = snd_soc_enum_item_to_val(e, item[0]); dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val); /* Check if state is changing ... */ if (out_src == val) return 0; /** * Ensure the current selected mixer clock is available * for configuration propagation */ if (!(priv->tdms & BIT(mix_clk))) { dev_err(comp->dev, "Started TDM%d needed for config propagation!\n", mix_clk + 1); return -EINVAL; } /* Check state transition constraints */ ret = fsl_audmix_state_trans(comp, &mask, &ctr, prms[out_src][val]); if (ret) return ret; /* Complete transition to new state */ mask |= FSL_AUDMIX_CTR_OUTSRC_MASK; ctr |= FSL_AUDMIX_CTR_OUTSRC(val); return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr); } static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = { /* FSL_AUDMIX_CTR controls */ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Mixing Clock Source", .info = snd_soc_info_enum_double, .access = SNDRV_CTL_ELEM_ACCESS_WRITE, .put = fsl_audmix_put_mix_clk_src, .private_value = (unsigned long)&fsl_audmix_enum[0] }, { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Output Source", .info = snd_soc_info_enum_double, .access = SNDRV_CTL_ELEM_ACCESS_WRITE, .put = fsl_audmix_put_out_src, .private_value = (unsigned long)&fsl_audmix_enum[1] }, SOC_ENUM("Output Width", fsl_audmix_enum[2]), SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]), SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]), SOC_ENUM("Sync Mode Config", fsl_audmix_enum[5]), SOC_ENUM("Sync Mode Clk Source", fsl_audmix_enum[6]), /* TDM1 Attenuation controls */ SOC_ENUM("TDM1 Attenuation", fsl_audmix_enum[7]), SOC_ENUM("TDM1 Attenuation Direction", fsl_audmix_enum[8]), SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AUDMIX_ATCR0, 2, 0x00fff, 0), SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AUDMIX_ATIVAL0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN0, 0, 0x3ffff, 0), SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT0, 0, 0x3ffff, 0), /* TDM2 Attenuation controls */ SOC_ENUM("TDM2 Attenuation", fsl_audmix_enum[9]), SOC_ENUM("TDM2 Attenuation Direction", fsl_audmix_enum[10]), SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AUDMIX_ATCR1, 2, 0x00fff, 0), SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AUDMIX_ATIVAL1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN1, 0, 0x3ffff, 0), SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT1, 0, 0x3ffff, 0), }; static int fsl_audmix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct snd_soc_component *comp = dai->component; u32 mask = 0, ctr = 0; /* AUDMIX is working in DSP_A format only */ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIFMT_DSP_A: break; default: return -EINVAL; } /* For playback the AUDMIX is consumer, and for record is provider */ switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { case SND_SOC_DAIFMT_BC_FC: case SND_SOC_DAIFMT_BP_FP: break; default: return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_INV_MASK) { case SND_SOC_DAIFMT_IB_NF: /* Output data will be written on positive edge of the clock */ ctr |= FSL_AUDMIX_CTR_OUTCKPOL(0); break; case SND_SOC_DAIFMT_NB_NF: /* Output data will be written on negative edge of the clock */ ctr |= FSL_AUDMIX_CTR_OUTCKPOL(1); break; default: return -EINVAL; } mask |= FSL_AUDMIX_CTR_OUTCKPOL_MASK; return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr); } static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd, struct snd_soc_dai *dai) { struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai); unsigned long lock_flags; /* Capture stream shall not be handled */ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) return 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: spin_lock_irqsave(&priv->lock, lock_flags); priv->tdms |= BIT(dai->driver->id); spin_unlock_irqrestore(&priv->lock, lock_flags); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: spin_lock_irqsave(&priv->lock, lock_flags); priv->tdms &= ~BIT(dai->driver->id); spin_unlock_irqrestore(&priv->lock, lock_flags); break; default: return -EINVAL; } return 0; } static const struct snd_soc_dai_ops fsl_audmix_dai_ops = { .set_fmt_new = fsl_audmix_dai_set_fmt, .trigger = fsl_audmix_dai_trigger, }; static struct snd_soc_dai_driver fsl_audmix_dai[] = { { .id = 0, .name = "audmix-0", .playback = { .stream_name = "AUDMIX-Playback-0", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AUDMIX_FORMATS, }, .capture = { .stream_name = "AUDMIX-Capture-0", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AUDMIX_FORMATS, }, .ops = &fsl_audmix_dai_ops, }, { .id = 1, .name = "audmix-1", .playback = { .stream_name = "AUDMIX-Playback-1", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AUDMIX_FORMATS, }, .capture = { .stream_name = "AUDMIX-Capture-1", .channels_min = 8, .channels_max = 8, .rate_min = 8000, .rate_max = 96000, .rates = SNDRV_PCM_RATE_8000_96000, .formats = FSL_AUDMIX_FORMATS, }, .ops = &fsl_audmix_dai_ops, }, }; static const struct snd_soc_component_driver fsl_audmix_component = { .name = "fsl-audmix-dai", .controls = fsl_audmix_snd_controls, .num_controls = ARRAY_SIZE(fsl_audmix_snd_controls), }; static bool fsl_audmix_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { case FSL_AUDMIX_CTR: case FSL_AUDMIX_STR: case FSL_AUDMIX_ATCR0: case FSL_AUDMIX_ATIVAL0: case FSL_AUDMIX_ATSTPUP0: case FSL_AUDMIX_ATSTPDN0: case FSL_AUDMIX_ATSTPTGT0: case FSL_AUDMIX_ATTNVAL0: case FSL_AUDMIX_ATSTP0: case FSL_AUDMIX_ATCR1: case FSL_AUDMIX_ATIVAL1: case FSL_AUDMIX_ATSTPUP1: case FSL_AUDMIX_ATSTPDN1: case FSL_AUDMIX_ATSTPTGT1: case FSL_AUDMIX_ATTNVAL1: case FSL_AUDMIX_ATSTP1: return true; default: return false; } } static bool fsl_audmix_writeable_reg(struct device *dev, unsigned int reg) { switch (reg) { case FSL_AUDMIX_CTR: case FSL_AUDMIX_ATCR0: case FSL_AUDMIX_ATIVAL0: case FSL_AUDMIX_ATSTPUP0: case FSL_AUDMIX_ATSTPDN0: case FSL_AUDMIX_ATSTPTGT0: case FSL_AUDMIX_ATCR1: case FSL_AUDMIX_ATIVAL1: case FSL_AUDMIX_ATSTPUP1: case FSL_AUDMIX_ATSTPDN1: case FSL_AUDMIX_ATSTPTGT1: return true; default: return false; } } static const struct reg_default fsl_audmix_reg[] = { { FSL_AUDMIX_CTR, 0x00060 }, { FSL_AUDMIX_STR, 0x00003 }, { FSL_AUDMIX_ATCR0, 0x00000 }, { FSL_AUDMIX_ATIVAL0, 0x3FFFF }, { FSL_AUDMIX_ATSTPUP0, 0x2AAAA }, { FSL_AUDMIX_ATSTPDN0, 0x30000 }, { FSL_AUDMIX_ATSTPTGT0, 0x00010 }, { FSL_AUDMIX_ATTNVAL0, 0x00000 }, { FSL_AUDMIX_ATSTP0, 0x00000 }, { FSL_AUDMIX_ATCR1, 0x00000 }, { FSL_AUDMIX_ATIVAL1, 0x3FFFF }, { FSL_AUDMIX_ATSTPUP1, 0x2AAAA }, { FSL_AUDMIX_ATSTPDN1, 0x30000 }, { FSL_AUDMIX_ATSTPTGT1, 0x00010 }, { FSL_AUDMIX_ATTNVAL1, 0x00000 }, { FSL_AUDMIX_ATSTP1, 0x00000 }, }; static const struct regmap_config fsl_audmix_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, .max_register = FSL_AUDMIX_ATSTP1, .reg_defaults = fsl_audmix_reg, .num_reg_defaults = ARRAY_SIZE(fsl_audmix_reg), .readable_reg = fsl_audmix_readable_reg, .writeable_reg = fsl_audmix_writeable_reg, .cache_type = REGCACHE_FLAT, }; static const struct of_device_id fsl_audmix_ids[] = { { .compatible = "fsl,imx8qm-audmix", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, fsl_audmix_ids); static int fsl_audmix_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fsl_audmix *priv; void __iomem *regs; int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; /* Get the addresses */ regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(regs)) return PTR_ERR(regs); priv->regmap = devm_regmap_init_mmio(dev, regs, &fsl_audmix_regmap_config); if (IS_ERR(priv->regmap)) { dev_err(dev, "failed to init regmap\n"); return PTR_ERR(priv->regmap); } priv->ipg_clk = devm_clk_get(dev, "ipg"); if (IS_ERR(priv->ipg_clk)) { dev_err(dev, "failed to get ipg clock\n"); return PTR_ERR(priv->ipg_clk); } spin_lock_init(&priv->lock); platform_set_drvdata(pdev, priv); pm_runtime_enable(dev); ret = devm_snd_soc_register_component(dev, &fsl_audmix_component, fsl_audmix_dai, ARRAY_SIZE(fsl_audmix_dai)); if (ret) { dev_err(dev, "failed to register ASoC DAI\n"); goto err_disable_pm; } priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0); if (IS_ERR(priv->pdev)) { ret = PTR_ERR(priv->pdev); dev_err(dev, "failed to register platform: %d\n", ret); goto err_disable_pm; } return 0; err_disable_pm: pm_runtime_disable(dev); return ret; } static int fsl_audmix_remove(struct platform_device *pdev) { struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev); pm_runtime_disable(&pdev->dev); if (priv->pdev) platform_device_unregister(priv->pdev); return 0; } #ifdef CONFIG_PM static int fsl_audmix_runtime_resume(struct device *dev) { struct fsl_audmix *priv = dev_get_drvdata(dev); int ret; ret = clk_prepare_enable(priv->ipg_clk); if (ret) { dev_err(dev, "Failed to enable IPG clock: %d\n", ret); return ret; } regcache_cache_only(priv->regmap, false); regcache_mark_dirty(priv->regmap); return regcache_sync(priv->regmap); } static int fsl_audmix_runtime_suspend(struct device *dev) { struct fsl_audmix *priv = dev_get_drvdata(dev); regcache_cache_only(priv->regmap, true); clk_disable_unprepare(priv->ipg_clk); return 0; } #endif /* CONFIG_PM */ static const struct dev_pm_ops fsl_audmix_pm = { SET_RUNTIME_PM_OPS(fsl_audmix_runtime_suspend, fsl_audmix_runtime_resume, NULL) SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) }; static struct platform_driver fsl_audmix_driver = { .probe = fsl_audmix_probe, .remove = fsl_audmix_remove, .driver = { .name = "fsl-audmix", .of_match_table = fsl_audmix_ids, .pm = &fsl_audmix_pm, }, }; module_platform_driver(fsl_audmix_driver); MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver"); MODULE_AUTHOR("Viorel Suman "); MODULE_ALIAS("platform:fsl-audmix"); MODULE_LICENSE("GPL v2");