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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * ASoC driver for TI DAVINCI EVM platform4 *5 * Author: Vladimir Barinov, <vbarinov@embeddedalley.com>6 * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>7 */8 9#include <linux/module.h>10#include <linux/moduleparam.h>11#include <linux/timer.h>12#include <linux/interrupt.h>13#include <linux/platform_device.h>14#include <linux/i2c.h>15#include <linux/of_platform.h>16#include <linux/clk.h>17#include <sound/core.h>18#include <sound/pcm.h>19#include <sound/soc.h>20 21#include <asm/dma.h>22#include <asm/mach-types.h>23 24struct snd_soc_card_drvdata_davinci {25 struct clk *mclk;26 unsigned sysclk;27};28 29static int evm_startup(struct snd_pcm_substream *substream)30{31 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);32 struct snd_soc_card *soc_card = rtd->card;33 struct snd_soc_card_drvdata_davinci *drvdata =34 snd_soc_card_get_drvdata(soc_card);35 36 if (drvdata->mclk)37 return clk_prepare_enable(drvdata->mclk);38 39 return 0;40}41 42static void evm_shutdown(struct snd_pcm_substream *substream)43{44 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);45 struct snd_soc_card *soc_card = rtd->card;46 struct snd_soc_card_drvdata_davinci *drvdata =47 snd_soc_card_get_drvdata(soc_card);48 49 clk_disable_unprepare(drvdata->mclk);50}51 52static int evm_hw_params(struct snd_pcm_substream *substream,53 struct snd_pcm_hw_params *params)54{55 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);56 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);57 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);58 struct snd_soc_card *soc_card = rtd->card;59 int ret = 0;60 unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)61 snd_soc_card_get_drvdata(soc_card))->sysclk;62 63 /* set the codec system clock */64 ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);65 if (ret < 0)66 return ret;67 68 /* set the CPU system clock */69 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);70 if (ret < 0 && ret != -ENOTSUPP)71 return ret;72 73 return 0;74}75 76static const struct snd_soc_ops evm_ops = {77 .startup = evm_startup,78 .shutdown = evm_shutdown,79 .hw_params = evm_hw_params,80};81 82/* davinci-evm machine dapm widgets */83static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {84 SND_SOC_DAPM_HP("Headphone Jack", NULL),85 SND_SOC_DAPM_LINE("Line Out", NULL),86 SND_SOC_DAPM_MIC("Mic Jack", NULL),87 SND_SOC_DAPM_LINE("Line In", NULL),88};89 90/* davinci-evm machine audio_mapnections to the codec pins */91static const struct snd_soc_dapm_route audio_map[] = {92 /* Headphone connected to HPLOUT, HPROUT */93 {"Headphone Jack", NULL, "HPLOUT"},94 {"Headphone Jack", NULL, "HPROUT"},95 96 /* Line Out connected to LLOUT, RLOUT */97 {"Line Out", NULL, "LLOUT"},98 {"Line Out", NULL, "RLOUT"},99 100 /* Mic connected to (MIC3L | MIC3R) */101 {"MIC3L", NULL, "Mic Bias"},102 {"MIC3R", NULL, "Mic Bias"},103 {"Mic Bias", NULL, "Mic Jack"},104 105 /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */106 {"LINE1L", NULL, "Line In"},107 {"LINE2L", NULL, "Line In"},108 {"LINE1R", NULL, "Line In"},109 {"LINE2R", NULL, "Line In"},110};111 112/* Logic for a aic3x as connected on a davinci-evm */113static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)114{115 struct snd_soc_card *card = rtd->card;116 struct device_node *np = card->dev->of_node;117 int ret;118 119 /* Add davinci-evm specific widgets */120 snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,121 ARRAY_SIZE(aic3x_dapm_widgets));122 123 if (np) {124 ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");125 if (ret)126 return ret;127 } else {128 /* Set up davinci-evm specific audio path audio_map */129 snd_soc_dapm_add_routes(&card->dapm, audio_map,130 ARRAY_SIZE(audio_map));131 }132 133 /* not connected */134 snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");135 snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");136 snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");137 138 return 0;139}140 141/*142 * The struct is used as place holder. It will be completely143 * filled with data from dt node.144 */145SND_SOC_DAILINK_DEFS(evm,146 DAILINK_COMP_ARRAY(COMP_EMPTY()),147 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),148 DAILINK_COMP_ARRAY(COMP_EMPTY()));149 150static struct snd_soc_dai_link evm_dai_tlv320aic3x = {151 .name = "TLV320AIC3X",152 .stream_name = "AIC3X",153 .ops = &evm_ops,154 .init = evm_aic3x_init,155 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |156 SND_SOC_DAIFMT_IB_NF,157 SND_SOC_DAILINK_REG(evm),158};159 160static const struct of_device_id davinci_evm_dt_ids[] = {161 {162 .compatible = "ti,da830-evm-audio",163 .data = (void *) &evm_dai_tlv320aic3x,164 },165 { /* sentinel */ }166};167MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);168 169/* davinci evm audio machine driver */170static struct snd_soc_card evm_soc_card = {171 .owner = THIS_MODULE,172 .num_links = 1,173};174 175static int davinci_evm_probe(struct platform_device *pdev)176{177 struct device_node *np = pdev->dev.of_node;178 struct snd_soc_dai_link *dai;179 struct snd_soc_card_drvdata_davinci *drvdata = NULL;180 struct clk *mclk;181 int ret = 0;182 183 dai = (struct snd_soc_dai_link *) device_get_match_data(&pdev->dev);184 if (!dai) {185 dev_err(&pdev->dev, "Error: No device match found\n");186 return -ENODEV;187 }188 189 evm_soc_card.dai_link = dai;190 191 dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);192 if (!dai->codecs->of_node)193 return -EINVAL;194 195 dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);196 if (!dai->cpus->of_node)197 return -EINVAL;198 199 dai->platforms->of_node = dai->cpus->of_node;200 201 evm_soc_card.dev = &pdev->dev;202 ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");203 if (ret)204 return ret;205 206 mclk = devm_clk_get(&pdev->dev, "mclk");207 if (PTR_ERR(mclk) == -EPROBE_DEFER) {208 return -EPROBE_DEFER;209 } else if (IS_ERR(mclk)) {210 dev_dbg(&pdev->dev, "mclk not found.\n");211 mclk = NULL;212 }213 214 drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);215 if (!drvdata)216 return -ENOMEM;217 218 drvdata->mclk = mclk;219 220 ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);221 222 if (ret < 0) {223 if (!drvdata->mclk) {224 dev_err(&pdev->dev,225 "No clock or clock rate defined.\n");226 return -EINVAL;227 }228 drvdata->sysclk = clk_get_rate(drvdata->mclk);229 } else if (drvdata->mclk) {230 unsigned int requestd_rate = drvdata->sysclk;231 clk_set_rate(drvdata->mclk, drvdata->sysclk);232 drvdata->sysclk = clk_get_rate(drvdata->mclk);233 if (drvdata->sysclk != requestd_rate)234 dev_warn(&pdev->dev,235 "Could not get requested rate %u using %u.\n",236 requestd_rate, drvdata->sysclk);237 }238 239 snd_soc_card_set_drvdata(&evm_soc_card, drvdata);240 ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);241 242 if (ret)243 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);244 245 return ret;246}247 248static struct platform_driver davinci_evm_driver = {249 .probe = davinci_evm_probe,250 .driver = {251 .name = "davinci_evm",252 .pm = &snd_soc_pm_ops,253 .of_match_table = davinci_evm_dt_ids,254 },255};256 257module_platform_driver(davinci_evm_driver);258 259MODULE_AUTHOR("Vladimir Barinov");260MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");261MODULE_LICENSE("GPL");262