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- // SPDX-License-Identifier: GPL-2.0
- /*
- * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver
- *
- * Copyright 2017 NXP
- */
- #include <linux/clk.h>
- #include <linux/module.h>
- #include <linux/of_platform.h>
- #include <linux/pm_runtime.h>
- #include <sound/soc.h>
- #include <sound/pcm_params.h>
- #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 */
- SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0],
- snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src),
- SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1],
- snd_soc_get_enum_double, fsl_audmix_put_out_src),
- 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 = 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 <[email protected]>");
- MODULE_ALIAS("platform:fsl-audmix");
- MODULE_LICENSE("GPL v2");
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