forked from Minki/linux
a1677e3902
According to the schematics the both LHPOUT and RHPOUT are connected to the external connector. RHPOUT is missing from the DAPM routes, but otherwise they seem to be complete. This patch adds the missing route and then sets the fully_routed flag for the card. This allows to remove all the manual calls to snd_soc_dapm_nc_pin(). Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
288 lines
6.9 KiB
C
288 lines
6.9 KiB
C
/*
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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 <sedji.gaouaou@atmel.com>
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*
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* Based on ati_b1_wm8731.c by:
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* Frank Mandarino <fmandarino@endrelia.com>
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 = rtd->codec_dai;
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int ret;
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printk(KERN_DEBUG
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"at91sam9g20ek_wm8731 "
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": at91sam9g20ek_wm8731_init() called\n");
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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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printk(KERN_ERR "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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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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.cpu_dai_name = "at91rm9200_ssc.0",
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.codec_dai_name = "wm8731-hifi",
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.init = at91sam9g20ek_wm8731_init,
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.platform_name = "at91rm9200_ssc.0",
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.codec_name = "wm8731.0-001b",
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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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};
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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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printk(KERN_ERR "ASoC: 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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printk(KERN_ERR "ASoC: 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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printk(KERN_ERR "ASoC: 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.codec_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.codec_of_node = codec_np;
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/* Parse dai and platform info */
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at91sam9g20ek_dai.cpu_dai_name = NULL;
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at91sam9g20ek_dai.platform_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.cpu_of_node = cpu_np;
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at91sam9g20ek_dai.platform_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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printk(KERN_ERR "ASoC: 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 <sedji.gaouaou@atmel.com>");
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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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