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- /*
- * sam9263_wm8974 -- SoC audio for AT91SAM9263-based
- * ATMEL AT91SAM9263ek board.
- *
- * Copyright (C) 2005 SAN People
- * Copyright (C) 2008 Atmel
- * Copyright (C) 2011 FEW Bauer GmbH
- *
- * Authors: Matthias Wieloch <matthias.wieloch@few-bauer.de>
- *
- * Based on sam9g20_wm8974.c by:
- * Sedji Gaouaou <sedji.gaouaou@atmel.com>
- * Copyright 2008 Atmel
- * Based on ati_b1_wm8731.c by:
- * Frank Mandarino <fmandarino@endrelia.com>
- * Copyright 2006 Endrelia Technologies Inc.
- * Based on corgi.c by:
- * Copyright 2005 Wolfson Microelectronics PLC.
- * Copyright 2005 Openedhand Ltd.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/kernel.h>
- #include <linux/clk.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/platform_device.h>
- #include <linux/i2c.h>
- #include <linux/atmel-ssc.h>
- #include <sound/core.h>
- #include <sound/pcm.h>
- #include <sound/pcm_params.h>
- #include <sound/soc.h>
- #include <asm/mach-types.h>
- #include <mach/hardware.h>
- #include <mach/gpio.h>
- #include "../codecs/wm8974.h"
- #include "atmel-pcm.h"
- #include "atmel_ssc_dai.h"
- #define MCLK_RATE 12288000
- /*
- * As shipped the board does not have inputs. However, it is relatively
- * straightforward to modify the board to hook them up so support is left
- * in the driver.
- */
- #define ENABLE_MIC_INPUT 1
- //static struct clk *mclk;
- static int at91sam9263ek_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
- {
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_dai *codec_dai = rtd->codec_dai;
- struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
- int ret;
- /* set codec DAI configuration */
- ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
- if (ret < 0)
- return ret;
- /* set cpu DAI configuration */
- ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
- if (ret < 0)
- return ret;
- return 0;
- }
- static struct snd_soc_ops at91sam9263ek_ops = {
- .hw_params = at91sam9263ek_hw_params,
- };
- static int at91sam9263ek_set_bias_level(struct snd_soc_card *card,
- enum snd_soc_bias_level level)
- {
- //static int mclk_on;
- int ret = 0;
- switch (level) {
- case SND_SOC_BIAS_ON:
- case SND_SOC_BIAS_PREPARE:
- /*if (!mclk_on)
- ret = clk_enable(mclk);
- if (ret == 0)
- mclk_on = 1;*/
- break;
- case SND_SOC_BIAS_OFF:
- case SND_SOC_BIAS_STANDBY:
- /*if (mclk_on)
- clk_disable(mclk);
- mclk_on = 0;*/
- break;
- }
- return ret;
- }
- static const struct snd_soc_dapm_widget at91sam9263ek_dapm_widgets[] = {
- SND_SOC_DAPM_MIC("Int Mic", NULL),
- SND_SOC_DAPM_SPK("Ext Spk", NULL),
- };
- static const struct snd_soc_dapm_route intercon[] = {
- /* Speaker output mixer */
- {"Speaker Mixer", "PCM Playback Switch", "DAC"},
- {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
- {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
- /* speaker connected to SPKOUTP */
- {"SpkN Out", NULL, "Speaker Mixer"},
- {"SpkP Out", NULL, "Speaker Mixer"},
- {"SPKOUTN", NULL, "SpkN Out"},
- {"SPKOUTP", NULL, "SpkP Out"},
- /* Input PGA */
- {"Input PGA", "Aux Switch", "Aux Input"},
- {"Input PGA", "MicN Switch", "MICN"},
- {"Input PGA", "MicP Switch", "MICP"},
- };
- /*
- * Logic for a wm8974 as connected on a at91sam9263ek board.
- */
- static int at91sam9263ek_wm8974_init(struct snd_soc_pcm_runtime *rtd)
- {
- struct snd_soc_codec *codec = rtd->codec;
- struct snd_soc_dapm_context *dapm = &codec->dapm;
- //int ret;
- printk(KERN_DEBUG
- "at91sam9263ek_wm8974 "
- ": at91sam9263ek_wm8974_init() called\n");
- /*ret = snd_soc_dai_set_sysclk(codec_dai, WM8974_MCLKDIV,
- MCLK_RATE, SND_SOC_CLOCK_IN);
- if (ret < 0) {
- printk(KERN_ERR "Failed to set WM8974 SYSCLK: %d\n", ret);
- return ret;
- }*/
- /* Add specific widgets */
- snd_soc_dapm_new_controls(dapm, at91sam9263ek_dapm_widgets,
- ARRAY_SIZE(at91sam9263ek_dapm_widgets));
- /* Set up specific audio path interconnects */
- snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
- /* not connected */
- snd_soc_dapm_nc_pin(dapm, "MONOOUT");
- snd_soc_dapm_nc_pin(dapm, "AUX");
- #ifdef ENABLE_MIC_INPUT
- snd_soc_dapm_enable_pin(dapm, "Int Mic");
- #else
- snd_soc_dapm_nc_pin(dapm, "Int Mic");
- #endif
- /* always connected */
- snd_soc_dapm_enable_pin(dapm, "Ext Spk");
- snd_soc_dapm_sync(dapm);
- return 0;
- }
- static struct snd_soc_dai_link at91sam9263ek_dai = {
- .name = "WM8974",
- .stream_name = "WM8974 PCM",
- .cpu_dai_name = "atmel-ssc-dai.1",
- .codec_dai_name = "wm8974-hifi",
- .init = at91sam9263ek_wm8974_init,
- .platform_name = "atmel-pcm-audio",
- .codec_name = "wm8974-codec.0-001a",
- .ops = &at91sam9263ek_ops,
- };
- static struct snd_soc_card snd_soc_at91sam9263ek = {
- .name = "AT91SAM263-EK",
- .dai_link = &at91sam9263ek_dai,
- .num_links = 1,
- .set_bias_level = at91sam9263ek_set_bias_level,
- };
- static struct platform_device *at91sam9263ek_snd_device;
- static int __init at91sam9263ek_init(void)
- {
- struct ssc_device *ssc = NULL;
- //struct clk *pllb;
- int ret;
- if (!(machine_is_at91sam9263ek()))
- return -ENODEV;
- ret = atmel_ssc_set_audio(1);
- if (ret != 0) {
- pr_err("Failed to set SSC 1 for audio: %d\n", ret);
- return ret;
- }
- /*
- * Codec MCLK is supplied by PCK0 - set it up.
- */
- /*mclk = clk_get(NULL, "pck0");
- if (IS_ERR(mclk)) {
- printk(KERN_ERR "ASoC: Failed to get MCLK\n");
- ret = PTR_ERR(mclk);
- goto err;
- }
- pllb = clk_get(NULL, "pllb");
- if (IS_ERR(pllb)) {
- printk(KERN_ERR "ASoC: Failed to get PLLB\n");
- ret = PTR_ERR(pllb);
- goto err_mclk;
- }
- ret = clk_set_parent(mclk, pllb);
- clk_put(pllb);
- if (ret != 0) {
- printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
- goto err_mclk;
- }
- clk_set_rate(mclk, MCLK_RATE);*/
- /*ssc = ssc_request(1);
- if (IS_ERR(ssc)) {
- printk(KERN_ERR "ASoC: Failed to request SSC 1\n");
- ret = PTR_ERR(ssc);
- ssc = NULL;
- goto err_ssc;
- }*/
- at91sam9263ek_snd_device = platform_device_alloc("soc-audio", -1);
- if (!at91sam9263ek_snd_device) {
- printk(KERN_ERR "ASoC: Platform device allocation failed\n");
- ret = -ENOMEM;
- goto err_mclk;
- }
- platform_set_drvdata(at91sam9263ek_snd_device,
- &snd_soc_at91sam9263ek);
- ret = platform_device_add(at91sam9263ek_snd_device);
- if (ret) {
- printk(KERN_ERR "ASoC: Platform device allocation failed\n");
- goto err_device_add;
- }
- return ret;
- err_device_add:
- platform_device_put(at91sam9263ek_snd_device);
- /*err_ssc:
- ssc_free(ssc);*/
- err_mclk:
- /*clk_put(mclk);
- mclk = NULL;*/
- //err:
- return ret;
- }
- static void __exit at91sam9263ek_exit(void)
- {
- platform_device_unregister(at91sam9263ek_snd_device);
- at91sam9263ek_snd_device = NULL;
- //clk_put(mclk);
- //mclk = NULL;
- }
- module_init(at91sam9263ek_init);
- module_exit(at91sam9263ek_exit);
- /* Module information */
- MODULE_AUTHOR("Matthias Wieloch <matthias.wieloch@few-bauer.de>");
- MODULE_DESCRIPTION("ALSA SoC AT91SAM9263EK_WM8974");
- MODULE_LICENSE("GPL");
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