ce6120cca2
Decoupling Dynamic Audio Power Management (DAPM) from codec devices is required when developing ASoC further. Such as for other ASoC components to have DAPM widgets or when extending DAPM to handle cross-device paths. This patch decouples DAPM related variables from struct snd_soc_codec and moves them to new struct snd_soc_dapm_context that is used to encapsulate DAPM context of a device. ASoC core and API of DAPM functions are modified to use DAPM context instead of codec. This patch does not change current functionality and a large part of changes come because of structure and internal API changes. Core implementation is from Liam Girdwood <lrg@slimlogic.co.uk> with some minor core changes, codecs and machine driver conversions from Jarkko Nikula <jhnikula@gmail.com>. Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Manuel Lauss <manuel.lauss@googlemail.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Cc: Cliff Cai <cliff.cai@analog.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Ryan Mallon <ryan@bluewatersys.com> Cc: Timur Tabi <timur@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Eric Miao <eric.y.miao@gmail.com> Cc: Jassi Brar <jassi.brar@samsung.com> Cc: Daniel Gloeckner <dg@emlix.com> Cc: Kuninori Morimoto <morimoto.kuninori@renesas.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
279 lines
6.8 KiB
C
279 lines
6.8 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/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 <sound/soc-dapm.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/gpio.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_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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int ret;
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/* set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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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 at91sam9g20ek_ops = {
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.hw_params = at91sam9g20ek_hw_params,
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};
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static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
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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 */
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{"Ext Spk", NULL, "LHPOUT"},
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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_codec *codec = rtd->codec;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dapm_context *dapm = &codec->dapm;
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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_XTAL,
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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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/* Add specific widgets */
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snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
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ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
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/* Set up specific audio path interconnects */
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snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
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/* not connected */
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snd_soc_dapm_nc_pin(dapm, "RLINEIN");
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snd_soc_dapm_nc_pin(dapm, "LLINEIN");
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#ifdef ENABLE_MIC_INPUT
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snd_soc_dapm_enable_pin(dapm, "Int Mic");
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#else
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snd_soc_dapm_nc_pin(dapm, "Int Mic");
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#endif
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/* always connected */
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snd_soc_dapm_enable_pin(dapm, "Ext Spk");
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snd_soc_dapm_sync(dapm);
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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 = "atmel-ssc-dai.0",
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.codec_dai_name = "wm8731-hifi",
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.init = at91sam9g20ek_wm8731_init,
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.platform_name = "atmel-pcm-audio",
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.codec_name = "wm8731-codec.0-001b",
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.ops = &at91sam9g20ek_ops,
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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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.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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};
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static struct platform_device *at91sam9g20ek_snd_device;
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static int __init at91sam9g20ek_init(void)
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{
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struct clk *pllb;
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int ret;
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if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
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return -ENODEV;
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ret = atmel_ssc_set_audio(0);
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if (ret != 0) {
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pr_err("Failed to set SSC 0 for audio: %d\n", ret);
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return ret;
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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(mclk)) {
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printk(KERN_ERR "ASoC: Failed to get PLLB\n");
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ret = PTR_ERR(mclk);
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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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at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
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if (!at91sam9g20ek_snd_device) {
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printk(KERN_ERR "ASoC: Platform device allocation failed\n");
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ret = -ENOMEM;
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}
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platform_set_drvdata(at91sam9g20ek_snd_device,
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&snd_soc_at91sam9g20ek);
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ret = platform_device_add(at91sam9g20ek_snd_device);
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if (ret) {
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printk(KERN_ERR "ASoC: Platform device allocation failed\n");
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platform_device_put(at91sam9g20ek_snd_device);
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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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return ret;
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}
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static void __exit at91sam9g20ek_exit(void)
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{
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platform_device_unregister(at91sam9g20ek_snd_device);
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at91sam9g20ek_snd_device = NULL;
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clk_put(mclk);
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mclk = NULL;
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}
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module_init(at91sam9g20ek_init);
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module_exit(at91sam9g20ek_exit);
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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_LICENSE("GPL");
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