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1// SPDX-License-Identifier: GPL-2.02//3// Lochnagar sound card driver4//5// Copyright (c) 2017-2019 Cirrus Logic, Inc. and6// Cirrus Logic International Semiconductor Ltd.7//8// Author: Charles Keepax <ckeepax@opensource.cirrus.com>9// Piotr Stankiewicz <piotrs@opensource.cirrus.com>10 11#include <linux/clk.h>12#include <linux/module.h>13#include <sound/soc.h>14 15#include <linux/mfd/lochnagar.h>16#include <linux/mfd/lochnagar1_regs.h>17#include <linux/mfd/lochnagar2_regs.h>18 19struct lochnagar_sc_priv {20 struct clk *mclk;21};22 23static const struct snd_soc_dapm_widget lochnagar_sc_widgets[] = {24 SND_SOC_DAPM_LINE("Line Jack", NULL),25 SND_SOC_DAPM_LINE("USB Audio", NULL),26};27 28static const struct snd_soc_dapm_route lochnagar_sc_routes[] = {29 { "Line Jack", NULL, "AIF1 Playback" },30 { "AIF1 Capture", NULL, "Line Jack" },31 32 { "USB Audio", NULL, "USB1 Playback" },33 { "USB Audio", NULL, "USB2 Playback" },34 { "USB1 Capture", NULL, "USB Audio" },35 { "USB2 Capture", NULL, "USB Audio" },36};37 38static const unsigned int lochnagar_sc_chan_vals[] = {39 4, 8,40};41 42static const struct snd_pcm_hw_constraint_list lochnagar_sc_chan_constraint = {43 .count = ARRAY_SIZE(lochnagar_sc_chan_vals),44 .list = lochnagar_sc_chan_vals,45};46 47static const unsigned int lochnagar_sc_rate_vals[] = {48 8000, 16000, 24000, 32000, 48000, 96000, 192000,49 22050, 44100, 88200, 176400,50};51 52static const struct snd_pcm_hw_constraint_list lochnagar_sc_rate_constraint = {53 .count = ARRAY_SIZE(lochnagar_sc_rate_vals),54 .list = lochnagar_sc_rate_vals,55};56 57static int lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params *params,58 struct snd_pcm_hw_rule *rule)59{60 struct snd_interval range = {61 .min = 8000,62 .max = 24576000 / hw_param_interval(params, rule->deps[0])->max,63 };64 65 return snd_interval_refine(hw_param_interval(params, rule->var),66 &range);67}68 69static int lochnagar_sc_startup(struct snd_pcm_substream *substream,70 struct snd_soc_dai *dai)71{72 struct snd_soc_component *comp = dai->component;73 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);74 int ret;75 76 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,77 SNDRV_PCM_HW_PARAM_RATE,78 &lochnagar_sc_rate_constraint);79 if (ret)80 return ret;81 82 return snd_pcm_hw_rule_add(substream->runtime, 0,83 SNDRV_PCM_HW_PARAM_RATE,84 lochnagar_sc_hw_rule_rate, priv,85 SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);86}87 88static int lochnagar_sc_line_startup(struct snd_pcm_substream *substream,89 struct snd_soc_dai *dai)90{91 struct snd_soc_component *comp = dai->component;92 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);93 int ret;94 95 ret = clk_prepare_enable(priv->mclk);96 if (ret < 0) {97 dev_err(dai->dev, "Failed to enable MCLK: %d\n", ret);98 return ret;99 }100 101 ret = lochnagar_sc_startup(substream, dai);102 if (ret)103 return ret;104 105 return snd_pcm_hw_constraint_list(substream->runtime, 0,106 SNDRV_PCM_HW_PARAM_CHANNELS,107 &lochnagar_sc_chan_constraint);108}109 110static void lochnagar_sc_line_shutdown(struct snd_pcm_substream *substream,111 struct snd_soc_dai *dai)112{113 struct snd_soc_component *comp = dai->component;114 struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);115 116 clk_disable_unprepare(priv->mclk);117}118 119static int lochnagar_sc_check_fmt(struct snd_soc_dai *dai, unsigned int fmt,120 unsigned int tar)121{122 tar |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;123 124 if ((fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) != tar)125 return -EINVAL;126 127 return 0;128}129 130static int lochnagar_sc_set_line_fmt(struct snd_soc_dai *dai, unsigned int fmt)131{132 return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBS_CFS);133}134 135static int lochnagar_sc_set_usb_fmt(struct snd_soc_dai *dai, unsigned int fmt)136{137 return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBM_CFM);138}139 140static const struct snd_soc_dai_ops lochnagar_sc_line_ops = {141 .startup = lochnagar_sc_line_startup,142 .shutdown = lochnagar_sc_line_shutdown,143 .set_fmt = lochnagar_sc_set_line_fmt,144};145 146static const struct snd_soc_dai_ops lochnagar_sc_usb_ops = {147 .startup = lochnagar_sc_startup,148 .set_fmt = lochnagar_sc_set_usb_fmt,149};150 151static struct snd_soc_dai_driver lochnagar_sc_dai[] = {152 {153 .name = "lochnagar-line",154 .playback = {155 .stream_name = "AIF1 Playback",156 .channels_min = 4,157 .channels_max = 8,158 .rates = SNDRV_PCM_RATE_KNOT,159 .formats = SNDRV_PCM_FMTBIT_S32_LE,160 },161 .capture = {162 .stream_name = "AIF1 Capture",163 .channels_min = 4,164 .channels_max = 8,165 .rates = SNDRV_PCM_RATE_KNOT,166 .formats = SNDRV_PCM_FMTBIT_S32_LE,167 },168 .ops = &lochnagar_sc_line_ops,169 .symmetric_rate = true,170 .symmetric_sample_bits = true,171 },172 {173 .name = "lochnagar-usb1",174 .playback = {175 .stream_name = "USB1 Playback",176 .channels_min = 1,177 .channels_max = 8,178 .rates = SNDRV_PCM_RATE_KNOT,179 .formats = SNDRV_PCM_FMTBIT_S32_LE,180 },181 .capture = {182 .stream_name = "USB1 Capture",183 .channels_min = 1,184 .channels_max = 8,185 .rates = SNDRV_PCM_RATE_KNOT,186 .formats = SNDRV_PCM_FMTBIT_S32_LE,187 },188 .ops = &lochnagar_sc_usb_ops,189 .symmetric_rate = true,190 .symmetric_sample_bits = true,191 },192 {193 .name = "lochnagar-usb2",194 .playback = {195 .stream_name = "USB2 Playback",196 .channels_min = 1,197 .channels_max = 8,198 .rates = SNDRV_PCM_RATE_KNOT,199 .formats = SNDRV_PCM_FMTBIT_S32_LE,200 },201 .capture = {202 .stream_name = "USB2 Capture",203 .channels_min = 1,204 .channels_max = 8,205 .rates = SNDRV_PCM_RATE_KNOT,206 .formats = SNDRV_PCM_FMTBIT_S32_LE,207 },208 .ops = &lochnagar_sc_usb_ops,209 .symmetric_rate = true,210 .symmetric_sample_bits = true,211 },212};213 214static const struct snd_soc_component_driver lochnagar_sc_driver = {215 .dapm_widgets = lochnagar_sc_widgets,216 .num_dapm_widgets = ARRAY_SIZE(lochnagar_sc_widgets),217 .dapm_routes = lochnagar_sc_routes,218 .num_dapm_routes = ARRAY_SIZE(lochnagar_sc_routes),219 220 .endianness = 1,221};222 223static int lochnagar_sc_probe(struct platform_device *pdev)224{225 struct lochnagar_sc_priv *priv;226 int ret;227 228 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);229 if (!priv)230 return -ENOMEM;231 232 priv->mclk = devm_clk_get(&pdev->dev, "mclk");233 if (IS_ERR(priv->mclk)) {234 ret = PTR_ERR(priv->mclk);235 dev_err(&pdev->dev, "Failed to get MCLK: %d\n", ret);236 return ret;237 }238 239 platform_set_drvdata(pdev, priv);240 241 return devm_snd_soc_register_component(&pdev->dev,242 &lochnagar_sc_driver,243 lochnagar_sc_dai,244 ARRAY_SIZE(lochnagar_sc_dai));245}246 247static const struct of_device_id lochnagar_of_match[] = {248 { .compatible = "cirrus,lochnagar2-soundcard" },249 {}250};251MODULE_DEVICE_TABLE(of, lochnagar_of_match);252 253static struct platform_driver lochnagar_sc_codec_driver = {254 .driver = {255 .name = "lochnagar-soundcard",256 .of_match_table = lochnagar_of_match,257 },258 259 .probe = lochnagar_sc_probe,260};261module_platform_driver(lochnagar_sc_codec_driver);262 263MODULE_DESCRIPTION("ASoC Lochnagar Sound Card Driver");264MODULE_AUTHOR("Piotr Stankiewicz <piotrs@opensource.cirrus.com>");265MODULE_LICENSE("GPL v2");266MODULE_ALIAS("platform:lochnagar-soundcard");267