diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/fsl/fsl_mqs.c | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_mqs.c b/sound/soc/fsl/fsl_mqs.c new file mode 100644 index 000000000..32d20d351 --- /dev/null +++ b/sound/soc/fsl/fsl_mqs.c @@ -0,0 +1,371 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// ALSA SoC IMX MQS driver +// +// Copyright (C) 2014-2015 Freescale Semiconductor, Inc. +// Copyright 2019 NXP + +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/pm.h> +#include <linux/slab.h> +#include <sound/soc.h> +#include <sound/pcm.h> +#include <sound/initval.h> + +#define REG_MQS_CTRL 0x00 + +#define MQS_EN_MASK (0x1 << 28) +#define MQS_EN_SHIFT (28) +#define MQS_SW_RST_MASK (0x1 << 24) +#define MQS_SW_RST_SHIFT (24) +#define MQS_OVERSAMPLE_MASK (0x1 << 20) +#define MQS_OVERSAMPLE_SHIFT (20) +#define MQS_CLK_DIV_MASK (0xFF << 0) +#define MQS_CLK_DIV_SHIFT (0) + +/** + * struct fsl_mqs_soc_data - soc specific data + * + * @use_gpr: control register is in General Purpose Register group + * @ctrl_off: control register offset + * @en_mask: enable bit mask + * @en_shift: enable bit shift + * @rst_mask: reset bit mask + * @rst_shift: reset bit shift + * @osr_mask: oversample bit mask + * @osr_shift: oversample bit shift + * @div_mask: clock divider mask + * @div_shift: clock divider bit shift + */ +struct fsl_mqs_soc_data { + bool use_gpr; + int ctrl_off; + int en_mask; + int en_shift; + int rst_mask; + int rst_shift; + int osr_mask; + int osr_shift; + int div_mask; + int div_shift; +}; + +/* codec private data */ +struct fsl_mqs { + struct regmap *regmap; + struct clk *mclk; + struct clk *ipg; + const struct fsl_mqs_soc_data *soc; + + unsigned int reg_mqs_ctrl; +}; + +#define FSL_MQS_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) +#define FSL_MQS_FORMATS SNDRV_PCM_FMTBIT_S16_LE + +static int fsl_mqs_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct fsl_mqs *mqs_priv = snd_soc_component_get_drvdata(component); + unsigned long mclk_rate; + int div, res; + int lrclk; + + mclk_rate = clk_get_rate(mqs_priv->mclk); + lrclk = params_rate(params); + + /* + * mclk_rate / (oversample(32,64) * FS * 2 * divider ) = repeat_rate; + * if repeat_rate is 8, mqs can achieve better quality. + * oversample rate is fix to 32 currently. + */ + div = mclk_rate / (32 * lrclk * 2 * 8); + res = mclk_rate % (32 * lrclk * 2 * 8); + + if (res == 0 && div > 0 && div <= 256) { + regmap_update_bits(mqs_priv->regmap, mqs_priv->soc->ctrl_off, + mqs_priv->soc->div_mask, + (div - 1) << mqs_priv->soc->div_shift); + regmap_update_bits(mqs_priv->regmap, mqs_priv->soc->ctrl_off, + mqs_priv->soc->osr_mask, 0); + } else { + dev_err(component->dev, "can't get proper divider\n"); + } + + return 0; +} + +static int fsl_mqs_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + /* Only LEFT_J & SLAVE mode is supported. */ + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_LEFT_J: + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { + case SND_SOC_DAIFMT_CBC_CFC: + break; + default: + return -EINVAL; + } + + return 0; +} + +static int fsl_mqs_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct fsl_mqs *mqs_priv = snd_soc_component_get_drvdata(component); + + regmap_update_bits(mqs_priv->regmap, mqs_priv->soc->ctrl_off, + mqs_priv->soc->en_mask, + 1 << mqs_priv->soc->en_shift); + return 0; +} + +static void fsl_mqs_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct fsl_mqs *mqs_priv = snd_soc_component_get_drvdata(component); + + regmap_update_bits(mqs_priv->regmap, mqs_priv->soc->ctrl_off, + mqs_priv->soc->en_mask, 0); +} + +static const struct snd_soc_component_driver soc_codec_fsl_mqs = { + .idle_bias_on = 1, +}; + +static const struct snd_soc_dai_ops fsl_mqs_dai_ops = { + .startup = fsl_mqs_startup, + .shutdown = fsl_mqs_shutdown, + .hw_params = fsl_mqs_hw_params, + .set_fmt = fsl_mqs_set_dai_fmt, +}; + +static struct snd_soc_dai_driver fsl_mqs_dai = { + .name = "fsl-mqs-dai", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = FSL_MQS_RATES, + .formats = FSL_MQS_FORMATS, + }, + .ops = &fsl_mqs_dai_ops, +}; + +static const struct regmap_config fsl_mqs_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = REG_MQS_CTRL, + .cache_type = REGCACHE_NONE, +}; + +static int fsl_mqs_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device_node *gpr_np = NULL; + struct fsl_mqs *mqs_priv; + void __iomem *regs; + int ret; + + mqs_priv = devm_kzalloc(&pdev->dev, sizeof(*mqs_priv), GFP_KERNEL); + if (!mqs_priv) + return -ENOMEM; + + /* On i.MX6sx the MQS control register is in GPR domain + * But in i.MX8QM/i.MX8QXP the control register is moved + * to its own domain. + */ + mqs_priv->soc = of_device_get_match_data(&pdev->dev); + + if (mqs_priv->soc->use_gpr) { + gpr_np = of_parse_phandle(np, "gpr", 0); + if (!gpr_np) { + dev_err(&pdev->dev, "failed to get gpr node by phandle\n"); + return -EINVAL; + } + + mqs_priv->regmap = syscon_node_to_regmap(gpr_np); + of_node_put(gpr_np); + if (IS_ERR(mqs_priv->regmap)) { + dev_err(&pdev->dev, "failed to get gpr regmap\n"); + return PTR_ERR(mqs_priv->regmap); + } + } else { + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + mqs_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev, + "core", + regs, + &fsl_mqs_regmap_config); + if (IS_ERR(mqs_priv->regmap)) { + dev_err(&pdev->dev, "failed to init regmap: %ld\n", + PTR_ERR(mqs_priv->regmap)); + return PTR_ERR(mqs_priv->regmap); + } + + mqs_priv->ipg = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(mqs_priv->ipg)) { + dev_err(&pdev->dev, "failed to get the clock: %ld\n", + PTR_ERR(mqs_priv->ipg)); + return PTR_ERR(mqs_priv->ipg); + } + } + + mqs_priv->mclk = devm_clk_get(&pdev->dev, "mclk"); + if (IS_ERR(mqs_priv->mclk)) { + dev_err(&pdev->dev, "failed to get the clock: %ld\n", + PTR_ERR(mqs_priv->mclk)); + return PTR_ERR(mqs_priv->mclk); + } + + dev_set_drvdata(&pdev->dev, mqs_priv); + pm_runtime_enable(&pdev->dev); + + ret = devm_snd_soc_register_component(&pdev->dev, &soc_codec_fsl_mqs, + &fsl_mqs_dai, 1); + if (ret) + return ret; + + return 0; +} + +static int fsl_mqs_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + return 0; +} + +#ifdef CONFIG_PM +static int fsl_mqs_runtime_resume(struct device *dev) +{ + struct fsl_mqs *mqs_priv = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(mqs_priv->ipg); + if (ret) { + dev_err(dev, "failed to enable ipg clock\n"); + return ret; + } + + ret = clk_prepare_enable(mqs_priv->mclk); + if (ret) { + dev_err(dev, "failed to enable mclk clock\n"); + clk_disable_unprepare(mqs_priv->ipg); + return ret; + } + + regmap_write(mqs_priv->regmap, mqs_priv->soc->ctrl_off, mqs_priv->reg_mqs_ctrl); + return 0; +} + +static int fsl_mqs_runtime_suspend(struct device *dev) +{ + struct fsl_mqs *mqs_priv = dev_get_drvdata(dev); + + regmap_read(mqs_priv->regmap, mqs_priv->soc->ctrl_off, &mqs_priv->reg_mqs_ctrl); + + clk_disable_unprepare(mqs_priv->mclk); + clk_disable_unprepare(mqs_priv->ipg); + + return 0; +} +#endif + +static const struct dev_pm_ops fsl_mqs_pm_ops = { + SET_RUNTIME_PM_OPS(fsl_mqs_runtime_suspend, + fsl_mqs_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + +static const struct fsl_mqs_soc_data fsl_mqs_imx8qm_data = { + .use_gpr = false, + .ctrl_off = REG_MQS_CTRL, + .en_mask = MQS_EN_MASK, + .en_shift = MQS_EN_SHIFT, + .rst_mask = MQS_SW_RST_MASK, + .rst_shift = MQS_SW_RST_SHIFT, + .osr_mask = MQS_OVERSAMPLE_MASK, + .osr_shift = MQS_OVERSAMPLE_SHIFT, + .div_mask = MQS_CLK_DIV_MASK, + .div_shift = MQS_CLK_DIV_SHIFT, +}; + +static const struct fsl_mqs_soc_data fsl_mqs_imx6sx_data = { + .use_gpr = true, + .ctrl_off = IOMUXC_GPR2, + .en_mask = IMX6SX_GPR2_MQS_EN_MASK, + .en_shift = IMX6SX_GPR2_MQS_EN_SHIFT, + .rst_mask = IMX6SX_GPR2_MQS_SW_RST_MASK, + .rst_shift = IMX6SX_GPR2_MQS_SW_RST_SHIFT, + .osr_mask = IMX6SX_GPR2_MQS_OVERSAMPLE_MASK, + .osr_shift = IMX6SX_GPR2_MQS_OVERSAMPLE_SHIFT, + .div_mask = IMX6SX_GPR2_MQS_CLK_DIV_MASK, + .div_shift = IMX6SX_GPR2_MQS_CLK_DIV_SHIFT, +}; + +static const struct fsl_mqs_soc_data fsl_mqs_imx93_data = { + .use_gpr = true, + .ctrl_off = 0x20, + .en_mask = BIT(1), + .en_shift = 1, + .rst_mask = BIT(2), + .rst_shift = 2, + .osr_mask = BIT(3), + .osr_shift = 3, + .div_mask = GENMASK(15, 8), + .div_shift = 8, +}; + +static const struct of_device_id fsl_mqs_dt_ids[] = { + { .compatible = "fsl,imx8qm-mqs", .data = &fsl_mqs_imx8qm_data }, + { .compatible = "fsl,imx6sx-mqs", .data = &fsl_mqs_imx6sx_data }, + { .compatible = "fsl,imx93-mqs", .data = &fsl_mqs_imx93_data }, + {} +}; +MODULE_DEVICE_TABLE(of, fsl_mqs_dt_ids); + +static struct platform_driver fsl_mqs_driver = { + .probe = fsl_mqs_probe, + .remove = fsl_mqs_remove, + .driver = { + .name = "fsl-mqs", + .of_match_table = fsl_mqs_dt_ids, + .pm = &fsl_mqs_pm_ops, + }, +}; + +module_platform_driver(fsl_mqs_driver); + +MODULE_AUTHOR("Shengjiu Wang <Shengjiu.Wang@nxp.com>"); +MODULE_DESCRIPTION("MQS codec driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:fsl-mqs"); |