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266 lines
6.3 KiB
266 lines
6.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* zylonite.c -- SoC audio for Zylonite |
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* |
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* Copyright 2008 Wolfson Microelectronics PLC. |
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* Author: Mark Brown <[email protected]> |
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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/device.h> |
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#include <linux/clk.h> |
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#include <linux/i2c.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 "../codecs/wm9713.h" |
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#include "pxa-ssp.h" |
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/* |
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* There is a physical switch SW15 on the board which changes the MCLK |
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* for the WM9713 between the standard AC97 master clock and the |
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* output of the CLK_POUT signal from the PXA. |
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*/ |
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static int clk_pout; |
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module_param(clk_pout, int, 0); |
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MODULE_PARM_DESC(clk_pout, "Use CLK_POUT as WM9713 MCLK (SW15 on board)."); |
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static struct clk *pout; |
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static struct snd_soc_card zylonite; |
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static const struct snd_soc_dapm_widget zylonite_dapm_widgets[] = { |
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SND_SOC_DAPM_HP("Headphone", NULL), |
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SND_SOC_DAPM_MIC("Headset Microphone", NULL), |
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SND_SOC_DAPM_MIC("Handset Microphone", NULL), |
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SND_SOC_DAPM_SPK("Multiactor", NULL), |
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SND_SOC_DAPM_SPK("Headset Earpiece", NULL), |
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}; |
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/* Currently supported audio map */ |
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static const struct snd_soc_dapm_route audio_map[] = { |
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/* Headphone output connected to HPL/HPR */ |
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{ "Headphone", NULL, "HPL" }, |
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{ "Headphone", NULL, "HPR" }, |
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/* On-board earpiece */ |
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{ "Headset Earpiece", NULL, "OUT3" }, |
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/* Headphone mic */ |
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{ "MIC2A", NULL, "Mic Bias" }, |
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{ "Mic Bias", NULL, "Headset Microphone" }, |
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/* On-board mic */ |
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{ "MIC1", NULL, "Mic Bias" }, |
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{ "Mic Bias", NULL, "Handset Microphone" }, |
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/* Multiactor differentially connected over SPKL/SPKR */ |
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{ "Multiactor", NULL, "SPKL" }, |
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{ "Multiactor", NULL, "SPKR" }, |
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}; |
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static int zylonite_wm9713_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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if (clk_pout) |
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snd_soc_dai_set_pll(asoc_rtd_to_codec(rtd, 0), 0, 0, |
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clk_get_rate(pout), 0); |
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return 0; |
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} |
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static int zylonite_voice_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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unsigned int wm9713_div = 0; |
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int ret = 0; |
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int rate = params_rate(params); |
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/* Only support ratios that we can generate neatly from the AC97 |
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* based master clock - in particular, this excludes 44.1kHz. |
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* In most applications the voice DAC will be used for telephony |
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* data so multiples of 8kHz will be the common case. |
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*/ |
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switch (rate) { |
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case 8000: |
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wm9713_div = 12; |
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break; |
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case 16000: |
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wm9713_div = 6; |
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break; |
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case 48000: |
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wm9713_div = 2; |
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break; |
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default: |
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/* Don't support OSS emulation */ |
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return -EINVAL; |
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} |
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_AUDIO, 0, 1); |
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if (ret < 0) |
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return ret; |
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if (clk_pout) |
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ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_PLL_DIV, |
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WM9713_PCMDIV(wm9713_div)); |
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else |
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ret = snd_soc_dai_set_clkdiv(codec_dai, WM9713_PCMCLK_DIV, |
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WM9713_PCMDIV(wm9713_div)); |
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if (ret < 0) |
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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 zylonite_voice_ops = { |
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.hw_params = zylonite_voice_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(ac97, |
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DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-ac97")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("wm9713-codec", "wm9713-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio"))); |
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SND_SOC_DAILINK_DEFS(ac97_aux, |
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DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-ac97-aux")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("wm9713-codec", "wm9713-aux")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio"))); |
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SND_SOC_DAILINK_DEFS(voice, |
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DAILINK_COMP_ARRAY(COMP_CPU("pxa-ssp-dai.2")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("wm9713-codec", "wm9713-voice")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio"))); |
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static struct snd_soc_dai_link zylonite_dai[] = { |
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{ |
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.name = "AC97", |
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.stream_name = "AC97 HiFi", |
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.init = zylonite_wm9713_init, |
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SND_SOC_DAILINK_REG(ac97), |
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}, |
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{ |
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.name = "AC97 Aux", |
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.stream_name = "AC97 Aux", |
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SND_SOC_DAILINK_REG(ac97_aux), |
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}, |
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{ |
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.name = "WM9713 Voice", |
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.stream_name = "WM9713 Voice", |
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBS_CFS, |
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.ops = &zylonite_voice_ops, |
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SND_SOC_DAILINK_REG(voice), |
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}, |
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}; |
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static int zylonite_probe(struct snd_soc_card *card) |
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{ |
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int ret; |
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if (clk_pout) { |
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pout = clk_get(NULL, "CLK_POUT"); |
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if (IS_ERR(pout)) { |
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dev_err(card->dev, "Unable to obtain CLK_POUT: %ld\n", |
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PTR_ERR(pout)); |
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return PTR_ERR(pout); |
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} |
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ret = clk_enable(pout); |
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if (ret != 0) { |
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dev_err(card->dev, "Unable to enable CLK_POUT: %d\n", |
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ret); |
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clk_put(pout); |
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return ret; |
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} |
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dev_dbg(card->dev, "MCLK enabled at %luHz\n", |
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clk_get_rate(pout)); |
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} |
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return 0; |
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} |
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static int zylonite_remove(struct snd_soc_card *card) |
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{ |
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if (clk_pout) { |
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clk_disable(pout); |
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clk_put(pout); |
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} |
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return 0; |
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} |
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static int zylonite_suspend_post(struct snd_soc_card *card) |
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{ |
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if (clk_pout) |
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clk_disable(pout); |
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return 0; |
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} |
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static int zylonite_resume_pre(struct snd_soc_card *card) |
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{ |
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int ret = 0; |
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if (clk_pout) { |
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ret = clk_enable(pout); |
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if (ret != 0) |
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dev_err(card->dev, "Unable to enable CLK_POUT: %d\n", |
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ret); |
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} |
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return ret; |
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} |
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static struct snd_soc_card zylonite = { |
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.name = "Zylonite", |
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.owner = THIS_MODULE, |
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.probe = &zylonite_probe, |
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.remove = &zylonite_remove, |
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.suspend_post = &zylonite_suspend_post, |
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.resume_pre = &zylonite_resume_pre, |
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.dai_link = zylonite_dai, |
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.num_links = ARRAY_SIZE(zylonite_dai), |
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.dapm_widgets = zylonite_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(zylonite_dapm_widgets), |
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.dapm_routes = audio_map, |
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.num_dapm_routes = ARRAY_SIZE(audio_map), |
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}; |
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static struct platform_device *zylonite_snd_ac97_device; |
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static int __init zylonite_init(void) |
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{ |
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int ret; |
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zylonite_snd_ac97_device = platform_device_alloc("soc-audio", -1); |
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if (!zylonite_snd_ac97_device) |
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return -ENOMEM; |
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platform_set_drvdata(zylonite_snd_ac97_device, &zylonite); |
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ret = platform_device_add(zylonite_snd_ac97_device); |
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if (ret != 0) |
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platform_device_put(zylonite_snd_ac97_device); |
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return ret; |
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} |
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static void __exit zylonite_exit(void) |
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{ |
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platform_device_unregister(zylonite_snd_ac97_device); |
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} |
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module_init(zylonite_init); |
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module_exit(zylonite_exit); |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite"); |
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MODULE_LICENSE("GPL");
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