276 lines
7.2 KiB
C
276 lines
7.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ASoC driver for TI DAVINCI EVM platform
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*
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* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
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* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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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/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <linux/of_platform.h>
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#include <linux/clk.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/dma.h>
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#include <asm/mach-types.h>
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struct snd_soc_card_drvdata_davinci {
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struct clk *mclk;
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unsigned sysclk;
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};
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static int evm_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_card *soc_card = rtd->card;
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struct snd_soc_card_drvdata_davinci *drvdata =
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snd_soc_card_get_drvdata(soc_card);
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if (drvdata->mclk)
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return clk_prepare_enable(drvdata->mclk);
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return 0;
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}
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static void evm_shutdown(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_card *soc_card = rtd->card;
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struct snd_soc_card_drvdata_davinci *drvdata =
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snd_soc_card_get_drvdata(soc_card);
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clk_disable_unprepare(drvdata->mclk);
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}
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static int evm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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struct snd_soc_card *soc_card = rtd->card;
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int ret = 0;
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unsigned sysclk = ((struct snd_soc_card_drvdata_davinci *)
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snd_soc_card_get_drvdata(soc_card))->sysclk;
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/* set the codec system clock */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
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if (ret < 0)
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return ret;
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/* set the CPU system clock */
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
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if (ret < 0 && ret != -ENOTSUPP)
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return ret;
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return 0;
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}
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static const struct snd_soc_ops evm_ops = {
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.startup = evm_startup,
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.shutdown = evm_shutdown,
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.hw_params = evm_hw_params,
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};
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/* davinci-evm machine dapm widgets */
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static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
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SND_SOC_DAPM_HP("Headphone Jack", NULL),
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SND_SOC_DAPM_LINE("Line Out", NULL),
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SND_SOC_DAPM_MIC("Mic Jack", NULL),
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SND_SOC_DAPM_LINE("Line In", NULL),
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};
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/* davinci-evm machine audio_mapnections to the codec pins */
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static const struct snd_soc_dapm_route audio_map[] = {
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/* Headphone connected to HPLOUT, HPROUT */
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{"Headphone Jack", NULL, "HPLOUT"},
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{"Headphone Jack", NULL, "HPROUT"},
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/* Line Out connected to LLOUT, RLOUT */
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{"Line Out", NULL, "LLOUT"},
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{"Line Out", NULL, "RLOUT"},
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/* Mic connected to (MIC3L | MIC3R) */
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{"MIC3L", NULL, "Mic Bias"},
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{"MIC3R", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Mic Jack"},
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/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
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{"LINE1L", NULL, "Line In"},
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{"LINE2L", NULL, "Line In"},
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{"LINE1R", NULL, "Line In"},
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{"LINE2R", NULL, "Line In"},
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};
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/* Logic for a aic3x as connected on a davinci-evm */
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static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct snd_soc_card *card = rtd->card;
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struct device_node *np = card->dev->of_node;
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int ret;
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/* Add davinci-evm specific widgets */
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snd_soc_dapm_new_controls(&card->dapm, aic3x_dapm_widgets,
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ARRAY_SIZE(aic3x_dapm_widgets));
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if (np) {
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ret = snd_soc_of_parse_audio_routing(card, "ti,audio-routing");
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if (ret)
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return ret;
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} else {
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/* Set up davinci-evm specific audio path audio_map */
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snd_soc_dapm_add_routes(&card->dapm, audio_map,
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ARRAY_SIZE(audio_map));
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}
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/* not connected */
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snd_soc_dapm_nc_pin(&card->dapm, "MONO_LOUT");
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snd_soc_dapm_nc_pin(&card->dapm, "HPLCOM");
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snd_soc_dapm_nc_pin(&card->dapm, "HPRCOM");
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return 0;
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}
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/*
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* The struct is used as place holder. It will be completely
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* filled with data from dt node.
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*/
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SND_SOC_DAILINK_DEFS(evm,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic3x-hifi")),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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static struct snd_soc_dai_link evm_dai_tlv320aic3x = {
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.name = "TLV320AIC3X",
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.stream_name = "AIC3X",
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.ops = &evm_ops,
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.init = evm_aic3x_init,
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.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM |
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SND_SOC_DAIFMT_IB_NF,
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SND_SOC_DAILINK_REG(evm),
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};
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static const struct of_device_id davinci_evm_dt_ids[] = {
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{
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.compatible = "ti,da830-evm-audio",
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.data = (void *) &evm_dai_tlv320aic3x,
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, davinci_evm_dt_ids);
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/* davinci evm audio machine driver */
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static struct snd_soc_card evm_soc_card = {
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.owner = THIS_MODULE,
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.num_links = 1,
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};
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static int davinci_evm_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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const struct of_device_id *match;
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struct snd_soc_dai_link *dai;
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struct snd_soc_card_drvdata_davinci *drvdata = NULL;
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struct clk *mclk;
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int ret = 0;
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match = of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev);
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if (!match) {
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dev_err(&pdev->dev, "Error: No device match found\n");
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return -ENODEV;
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}
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dai = (struct snd_soc_dai_link *) match->data;
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evm_soc_card.dai_link = dai;
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dai->codecs->of_node = of_parse_phandle(np, "ti,audio-codec", 0);
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if (!dai->codecs->of_node)
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return -EINVAL;
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dai->cpus->of_node = of_parse_phandle(np, "ti,mcasp-controller", 0);
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if (!dai->cpus->of_node)
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return -EINVAL;
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dai->platforms->of_node = dai->cpus->of_node;
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evm_soc_card.dev = &pdev->dev;
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ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model");
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if (ret)
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return ret;
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mclk = devm_clk_get(&pdev->dev, "mclk");
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if (PTR_ERR(mclk) == -EPROBE_DEFER) {
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return -EPROBE_DEFER;
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} else if (IS_ERR(mclk)) {
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dev_dbg(&pdev->dev, "mclk not found.\n");
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mclk = NULL;
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}
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drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
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if (!drvdata)
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return -ENOMEM;
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drvdata->mclk = mclk;
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ret = of_property_read_u32(np, "ti,codec-clock-rate", &drvdata->sysclk);
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if (ret < 0) {
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if (!drvdata->mclk) {
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dev_err(&pdev->dev,
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"No clock or clock rate defined.\n");
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return -EINVAL;
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}
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drvdata->sysclk = clk_get_rate(drvdata->mclk);
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} else if (drvdata->mclk) {
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unsigned int requestd_rate = drvdata->sysclk;
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clk_set_rate(drvdata->mclk, drvdata->sysclk);
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drvdata->sysclk = clk_get_rate(drvdata->mclk);
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if (drvdata->sysclk != requestd_rate)
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dev_warn(&pdev->dev,
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"Could not get requested rate %u using %u.\n",
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requestd_rate, drvdata->sysclk);
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}
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snd_soc_card_set_drvdata(&evm_soc_card, drvdata);
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ret = devm_snd_soc_register_card(&pdev->dev, &evm_soc_card);
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if (ret)
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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return ret;
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}
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static struct platform_driver davinci_evm_driver = {
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.probe = davinci_evm_probe,
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.driver = {
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.name = "davinci_evm",
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.pm = &snd_soc_pm_ops,
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.of_match_table = davinci_evm_dt_ids,
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},
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};
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static int __init evm_init(void)
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{
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return platform_driver_register(&davinci_evm_driver);
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}
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static void __exit evm_exit(void)
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{
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platform_driver_unregister(&davinci_evm_driver);
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}
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module_init(evm_init);
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module_exit(evm_exit);
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MODULE_AUTHOR("Vladimir Barinov");
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MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
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MODULE_LICENSE("GPL");
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