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275 lines
6.3 KiB
275 lines
6.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based |
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* ATMEL AT91SAM9G20ek board. |
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* |
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* Copyright (C) 2005 SAN People |
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* Copyright (C) 2008 Atmel |
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* |
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* Authors: Sedji Gaouaou <[email protected]> |
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* |
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* Based on ati_b1_wm8731.c by: |
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* Frank Mandarino <[email protected]> |
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* Copyright 2006 Endrelia Technologies Inc. |
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* Based on corgi.c by: |
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* Copyright 2005 Wolfson Microelectronics PLC. |
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* Copyright 2005 Openedhand Ltd. |
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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/kernel.h> |
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#include <linux/clk.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.h> |
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#include <linux/atmel-ssc.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/wm8731.h" |
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#include "atmel-pcm.h" |
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#include "atmel_ssc_dai.h" |
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#define MCLK_RATE 12000000 |
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/* |
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* As shipped the board does not have inputs. However, it is relatively |
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* straightforward to modify the board to hook them up so support is left |
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* in the driver. |
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*/ |
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#undef ENABLE_MIC_INPUT |
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static struct clk *mclk; |
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static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, |
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struct snd_soc_dapm_context *dapm, |
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enum snd_soc_bias_level level) |
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{ |
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static int mclk_on; |
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int ret = 0; |
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switch (level) { |
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case SND_SOC_BIAS_ON: |
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case SND_SOC_BIAS_PREPARE: |
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if (!mclk_on) |
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ret = clk_enable(mclk); |
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if (ret == 0) |
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mclk_on = 1; |
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break; |
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case SND_SOC_BIAS_OFF: |
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case SND_SOC_BIAS_STANDBY: |
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if (mclk_on) |
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clk_disable(mclk); |
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mclk_on = 0; |
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break; |
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} |
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return ret; |
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} |
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static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { |
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SND_SOC_DAPM_MIC("Int Mic", NULL), |
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SND_SOC_DAPM_SPK("Ext Spk", NULL), |
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}; |
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static const struct snd_soc_dapm_route intercon[] = { |
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/* speaker connected to LHPOUT/RHPOUT */ |
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{"Ext Spk", NULL, "LHPOUT"}, |
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{"Ext Spk", NULL, "RHPOUT"}, |
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/* mic is connected to Mic Jack, with WM8731 Mic Bias */ |
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{"MICIN", NULL, "Mic Bias"}, |
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{"Mic Bias", NULL, "Int Mic"}, |
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}; |
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/* |
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* Logic for a wm8731 as connected on a at91sam9g20ek board. |
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*/ |
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static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) |
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{ |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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struct device *dev = rtd->dev; |
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int ret; |
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dev_dbg(dev, "%s called\n", __func__); |
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, |
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MCLK_RATE, SND_SOC_CLOCK_IN); |
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if (ret < 0) { |
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dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); |
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return ret; |
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} |
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#ifndef ENABLE_MIC_INPUT |
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snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); |
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#endif |
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return 0; |
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} |
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SND_SOC_DAILINK_DEFS(pcm, |
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DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0"))); |
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static struct snd_soc_dai_link at91sam9g20ek_dai = { |
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.name = "WM8731", |
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.stream_name = "WM8731 PCM", |
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.init = at91sam9g20ek_wm8731_init, |
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
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SND_SOC_DAIFMT_CBM_CFM, |
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SND_SOC_DAILINK_REG(pcm), |
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}; |
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static struct snd_soc_card snd_soc_at91sam9g20ek = { |
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.name = "AT91SAMG20-EK", |
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.owner = THIS_MODULE, |
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.dai_link = &at91sam9g20ek_dai, |
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.num_links = 1, |
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.set_bias_level = at91sam9g20ek_set_bias_level, |
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.dapm_widgets = at91sam9g20ek_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), |
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.dapm_routes = intercon, |
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.num_dapm_routes = ARRAY_SIZE(intercon), |
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.fully_routed = true, |
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}; |
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static int at91sam9g20ek_audio_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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struct device_node *codec_np, *cpu_np; |
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struct clk *pllb; |
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struct snd_soc_card *card = &snd_soc_at91sam9g20ek; |
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int ret; |
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if (!np) { |
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return -ENODEV; |
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} |
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ret = atmel_ssc_set_audio(0); |
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if (ret) { |
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dev_err(&pdev->dev, "ssc channel is not valid\n"); |
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return -EINVAL; |
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} |
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/* |
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* Codec MCLK is supplied by PCK0 - set it up. |
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*/ |
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mclk = clk_get(NULL, "pck0"); |
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if (IS_ERR(mclk)) { |
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dev_err(&pdev->dev, "Failed to get MCLK\n"); |
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ret = PTR_ERR(mclk); |
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goto err; |
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} |
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pllb = clk_get(NULL, "pllb"); |
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if (IS_ERR(pllb)) { |
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dev_err(&pdev->dev, "Failed to get PLLB\n"); |
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ret = PTR_ERR(pllb); |
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goto err_mclk; |
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} |
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ret = clk_set_parent(mclk, pllb); |
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clk_put(pllb); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "Failed to set MCLK parent\n"); |
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goto err_mclk; |
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} |
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clk_set_rate(mclk, MCLK_RATE); |
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card->dev = &pdev->dev; |
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/* Parse device node info */ |
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ret = snd_soc_of_parse_card_name(card, "atmel,model"); |
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if (ret) |
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goto err; |
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ret = snd_soc_of_parse_audio_routing(card, |
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"atmel,audio-routing"); |
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if (ret) |
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goto err; |
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/* Parse codec info */ |
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at91sam9g20ek_dai.codecs->name = NULL; |
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codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); |
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if (!codec_np) { |
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dev_err(&pdev->dev, "codec info missing\n"); |
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return -EINVAL; |
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} |
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at91sam9g20ek_dai.codecs->of_node = codec_np; |
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/* Parse dai and platform info */ |
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at91sam9g20ek_dai.cpus->dai_name = NULL; |
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at91sam9g20ek_dai.platforms->name = NULL; |
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cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); |
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if (!cpu_np) { |
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dev_err(&pdev->dev, "dai and pcm info missing\n"); |
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return -EINVAL; |
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} |
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at91sam9g20ek_dai.cpus->of_node = cpu_np; |
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at91sam9g20ek_dai.platforms->of_node = cpu_np; |
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of_node_put(codec_np); |
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of_node_put(cpu_np); |
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ret = snd_soc_register_card(card); |
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if (ret) { |
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dev_err(&pdev->dev, "snd_soc_register_card() failed\n"); |
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} |
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return ret; |
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err_mclk: |
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clk_put(mclk); |
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mclk = NULL; |
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err: |
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atmel_ssc_put_audio(0); |
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return ret; |
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} |
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static int at91sam9g20ek_audio_remove(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = platform_get_drvdata(pdev); |
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clk_disable(mclk); |
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mclk = NULL; |
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snd_soc_unregister_card(card); |
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atmel_ssc_put_audio(0); |
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return 0; |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { |
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{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); |
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#endif |
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static struct platform_driver at91sam9g20ek_audio_driver = { |
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.driver = { |
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.name = "at91sam9g20ek-audio", |
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.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), |
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}, |
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.probe = at91sam9g20ek_audio_probe, |
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.remove = at91sam9g20ek_audio_remove, |
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}; |
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module_platform_driver(at91sam9g20ek_audio_driver); |
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/* Module information */ |
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MODULE_AUTHOR("Sedji Gaouaou <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); |
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MODULE_ALIAS("platform:at91sam9g20ek-audio"); |
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MODULE_LICENSE("GPL");
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