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254 lines
6.2 KiB
254 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* wm8524.c -- WM8524 ALSA SoC Audio driver |
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* |
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* Copyright 2009 Wolfson Microelectronics plc |
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* Copyright 2017 NXP |
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* |
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* Based on WM8523 ALSA SoC Audio driver written by Mark Brown |
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*/ |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/slab.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/of_device.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/initval.h> |
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#define WM8524_NUM_RATES 7 |
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/* codec private data */ |
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struct wm8524_priv { |
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struct gpio_desc *mute; |
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unsigned int sysclk; |
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unsigned int rate_constraint_list[WM8524_NUM_RATES]; |
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struct snd_pcm_hw_constraint_list rate_constraint; |
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}; |
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static const struct snd_soc_dapm_widget wm8524_dapm_widgets[] = { |
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SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_OUTPUT("LINEVOUTL"), |
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SND_SOC_DAPM_OUTPUT("LINEVOUTR"), |
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}; |
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static const struct snd_soc_dapm_route wm8524_dapm_routes[] = { |
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{ "LINEVOUTL", NULL, "DAC" }, |
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{ "LINEVOUTR", NULL, "DAC" }, |
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}; |
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static const struct { |
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int value; |
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int ratio; |
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} lrclk_ratios[WM8524_NUM_RATES] = { |
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{ 1, 128 }, |
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{ 2, 192 }, |
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{ 3, 256 }, |
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{ 4, 384 }, |
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{ 5, 512 }, |
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{ 6, 768 }, |
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{ 7, 1152 }, |
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}; |
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static int wm8524_startup(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct wm8524_priv *wm8524 = snd_soc_component_get_drvdata(component); |
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/* The set of sample rates that can be supported depends on the |
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* MCLK supplied to the CODEC - enforce this. |
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*/ |
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if (!wm8524->sysclk) { |
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dev_err(component->dev, |
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"No MCLK configured, call set_sysclk() on init\n"); |
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return -EINVAL; |
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} |
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snd_pcm_hw_constraint_list(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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&wm8524->rate_constraint); |
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gpiod_set_value_cansleep(wm8524->mute, 1); |
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return 0; |
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} |
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static void wm8524_shutdown(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct wm8524_priv *wm8524 = snd_soc_component_get_drvdata(component); |
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gpiod_set_value_cansleep(wm8524->mute, 0); |
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} |
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static int wm8524_set_dai_sysclk(struct snd_soc_dai *codec_dai, |
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int clk_id, unsigned int freq, int dir) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct wm8524_priv *wm8524 = snd_soc_component_get_drvdata(component); |
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unsigned int val; |
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int i, j = 0; |
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wm8524->sysclk = freq; |
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wm8524->rate_constraint.count = 0; |
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for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { |
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val = freq / lrclk_ratios[i].ratio; |
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/* Check that it's a standard rate since core can't |
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* cope with others and having the odd rates confuses |
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* constraint matching. |
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*/ |
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switch (val) { |
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case 8000: |
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case 32000: |
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case 44100: |
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case 48000: |
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case 88200: |
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case 96000: |
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case 176400: |
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case 192000: |
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dev_dbg(component->dev, "Supported sample rate: %dHz\n", |
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val); |
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wm8524->rate_constraint_list[j++] = val; |
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wm8524->rate_constraint.count++; |
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break; |
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default: |
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dev_dbg(component->dev, "Skipping sample rate: %dHz\n", |
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val); |
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} |
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} |
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/* Need at least one supported rate... */ |
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if (wm8524->rate_constraint.count == 0) |
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return -EINVAL; |
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return 0; |
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} |
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static int wm8524_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) |
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{ |
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fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK | |
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SND_SOC_DAIFMT_MASTER_MASK); |
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if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBS_CFS)) { |
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dev_err(codec_dai->dev, "Invalid DAI format\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int wm8524_mute_stream(struct snd_soc_dai *dai, int mute, int stream) |
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{ |
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struct wm8524_priv *wm8524 = snd_soc_component_get_drvdata(dai->component); |
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if (wm8524->mute) |
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gpiod_set_value_cansleep(wm8524->mute, mute); |
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return 0; |
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} |
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#define WM8524_RATES SNDRV_PCM_RATE_8000_192000 |
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#define WM8524_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\ |
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SNDRV_PCM_FMTBIT_S24_LE |\ |
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SNDRV_PCM_FMTBIT_S32_LE) |
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static const struct snd_soc_dai_ops wm8524_dai_ops = { |
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.startup = wm8524_startup, |
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.shutdown = wm8524_shutdown, |
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.set_sysclk = wm8524_set_dai_sysclk, |
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.set_fmt = wm8524_set_fmt, |
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.mute_stream = wm8524_mute_stream, |
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}; |
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static struct snd_soc_dai_driver wm8524_dai = { |
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.name = "wm8524-hifi", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = WM8524_RATES, |
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.formats = WM8524_FORMATS, |
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}, |
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.ops = &wm8524_dai_ops, |
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}; |
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static int wm8524_probe(struct snd_soc_component *component) |
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{ |
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struct wm8524_priv *wm8524 = snd_soc_component_get_drvdata(component); |
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wm8524->rate_constraint.list = &wm8524->rate_constraint_list[0]; |
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wm8524->rate_constraint.count = |
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ARRAY_SIZE(wm8524->rate_constraint_list); |
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return 0; |
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} |
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static const struct snd_soc_component_driver soc_component_dev_wm8524 = { |
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.probe = wm8524_probe, |
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.dapm_widgets = wm8524_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wm8524_dapm_widgets), |
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.dapm_routes = wm8524_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(wm8524_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static const struct of_device_id wm8524_of_match[] = { |
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{ .compatible = "wlf,wm8524" }, |
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{ /* sentinel*/ } |
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}; |
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MODULE_DEVICE_TABLE(of, wm8524_of_match); |
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static int wm8524_codec_probe(struct platform_device *pdev) |
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{ |
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struct wm8524_priv *wm8524; |
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int ret; |
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wm8524 = devm_kzalloc(&pdev->dev, sizeof(struct wm8524_priv), |
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GFP_KERNEL); |
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if (wm8524 == NULL) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, wm8524); |
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wm8524->mute = devm_gpiod_get(&pdev->dev, "wlf,mute", GPIOD_OUT_LOW); |
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if (IS_ERR(wm8524->mute)) { |
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ret = PTR_ERR(wm8524->mute); |
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dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret); |
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return ret; |
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} |
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ret = devm_snd_soc_register_component(&pdev->dev, |
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&soc_component_dev_wm8524, &wm8524_dai, 1); |
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if (ret < 0) |
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dev_err(&pdev->dev, "Failed to register component: %d\n", ret); |
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return ret; |
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} |
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static struct platform_driver wm8524_codec_driver = { |
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.probe = wm8524_codec_probe, |
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.driver = { |
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.name = "wm8524-codec", |
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.of_match_table = wm8524_of_match, |
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}, |
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}; |
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module_platform_driver(wm8524_codec_driver); |
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MODULE_DESCRIPTION("ASoC WM8524 driver"); |
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MODULE_AUTHOR("Mihai Serban <[email protected]>"); |
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MODULE_ALIAS("platform:wm8524-codec"); |
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MODULE_LICENSE("GPL");
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