276 lines
6.4 KiB
C
276 lines
6.4 KiB
C
/*
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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 <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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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 "pxa2xx-ac97.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(rtd->codec_dai, 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 = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int pll_out = 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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int width = snd_pcm_format_physical_width(params_format(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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/* Add 1 to the width for the leading clock cycle */
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pll_out = rate * (width + 1) * 8;
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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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ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, pll_out);
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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 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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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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.codec_name = "wm9713-codec",
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.platform_name = "pxa-pcm-audio",
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.cpu_dai_name = "pxa2xx-ac97",
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.codec_dai_name = "wm9713-hifi",
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.init = zylonite_wm9713_init,
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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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.codec_name = "wm9713-codec",
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.platform_name = "pxa-pcm-audio",
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.cpu_dai_name = "pxa2xx-ac97-aux",
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.codec_dai_name = "wm9713-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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.codec_name = "wm9713-codec",
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.platform_name = "pxa-pcm-audio",
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.cpu_dai_name = "pxa-ssp-dai.2",
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.codec_dai_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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},
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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 <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("ALSA SoC WM9713 Zylonite");
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MODULE_LICENSE("GPL");
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