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Commit 2ccafed4 authored by javier Martin's avatar javier Martin Committed by Mark Brown
Browse files

ASoC: add machine driver for i.mx27_visstrim_m10 board 



This adds support for i.mx27_visstrim_sm10 board machine driver which
uses an i.mx27 processor plus a wm8974 codec.

It has been tested on a visstrim_sm10 board.

Signed-off-by: default avatarJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 9d8bc296

sound/soc/imx/Kconfig

+8 −0
Original line number Original line Diff line number Diff line
@@ -9,5 +9,13 @@ config SND_MX1_MX2_SOC 
config SND_MXC_SOC_SSI

config SND_MXC_SOC_SSI

	tristate

	tristate





config SND_SOC_MX27VIS_WM8974

	tristate "SoC Audio support for MX27 - WM8974 Visstrim_sm10 board"

	depends on SND_MX1_MX2_SOC && MACH_MX27 && MACH_IMX27_VISSTRIM_M10

	select SND_MXC_SOC_SSI

	select SND_SOC_WM8974

	help

	  Say Y if you want to add support for SoC audio on Visstrim SM10

	  board with WM8974.

sound/soc/imx/Makefile

+4 −0
Original line number Original line Diff line number Diff line
@@ -4,3 +4,7 @@ snd-soc-mxc-ssi-objs := mxc-ssi.o 




obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o

obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o

obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o

obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o



# i.MX Machine Support

snd-soc-mx27vis-wm8974-objs := mx27vis_wm8974.o

obj-$(CONFIG_SND_SOC_MX27VIS_WM8974) += snd-soc-mx27vis-wm8974.o

sound/soc/imx/mx27vis_wm8974.c

0 → 100644
+317 −0
Original line number Original line Diff line number Diff line 
/*

 * mx27vis_wm8974.c  --  SoC audio for mx27vis

 *

 * Copyright 2009 Vista Silicon S.L.

 * Author: Javier Martin

 *         javier.martin@vista-silicon.com

 *

 *  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.

 *

 */



#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/device.h>

#include <linux/i2c.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>





#include "../codecs/wm8974.h"

#include "mx1_mx2-pcm.h"

#include "mxc-ssi.h"

#include <mach/gpio.h>

#include <mach/iomux.h>



#define IGNORED_ARG 0





static struct snd_soc_card mx27vis;



/**

  * This function connects SSI1 (HPCR1) as slave to

  * SSI1 external signals (PPCR1)

  * As slave, HPCR1 must set TFSDIR and TCLKDIR as inputs from

  * port 4

  */

void audmux_connect_1_4(void)

{

	pr_debug("AUDMUX: normal operation mode\n");

	/* Reset HPCR1 and PPCR1 */



	DAM_HPCR1 = 0x00000000;

	DAM_PPCR1 = 0x00000000;



	/* set to synchronous */

	DAM_HPCR1 |= AUDMUX_HPCR_SYN;

	DAM_PPCR1 |= AUDMUX_PPCR_SYN;





	/* set Rx sources 1 <--> 4 */

	DAM_HPCR1 |= AUDMUX_HPCR_RXDSEL(3); /* port 4 */

	DAM_PPCR1 |= AUDMUX_PPCR_RXDSEL(0); /* port 1 */



	/* set Tx frame and Clock direction and source  4 --> 1 output */

	DAM_HPCR1 |= AUDMUX_HPCR_TFSDIR | AUDMUX_HPCR_TCLKDIR;

	DAM_HPCR1 |= AUDMUX_HPCR_TFCSEL(3); /* TxDS and TxCclk from port 4 */



	return;

}



static int mx27vis_hifi_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->dai->codec_dai;

	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	unsigned int pll_out = 0, bclk = 0, fmt = 0, mclk = 0;

	int ret = 0;



	/*

	 * The WM8974 is better at generating accurate audio clocks than the

	 * MX27 SSI controller, so we will use it as master when we can.

	 */

	switch (params_rate(params)) {

	case 8000:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		mclk = WM8974_MCLKDIV_12;

		pll_out = 24576000;

		break;

	case 16000:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		pll_out = 12288000;

		break;

	case 48000:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_4;

		pll_out = 12288000;

		break;

	case 96000:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_2;

		pll_out = 12288000;

		break;

	case 11025:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_16;

		pll_out = 11289600;

		break;

	case 22050:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_8;

		pll_out = 11289600;

		break;

	case 44100:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_4;

		mclk = WM8974_MCLKDIV_2;

		pll_out = 11289600;

		break;

	case 88200:

		fmt = SND_SOC_DAIFMT_CBM_CFM;

		bclk = WM8974_BCLKDIV_2;

		pll_out = 11289600;

		break;

	}



	/* set codec DAI configuration */

	ret = codec_dai->ops->set_fmt(codec_dai,

		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |

		SND_SOC_DAIFMT_SYNC | fmt);

	if (ret < 0) {

		printk(KERN_ERR "Error from codec DAI configuration\n");

		return ret;

	}



	/* set cpu DAI configuration */

	ret = cpu_dai->ops->set_fmt(cpu_dai,

		SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |

		SND_SOC_DAIFMT_SYNC | fmt);

	if (ret < 0) {

		printk(KERN_ERR "Error from cpu DAI configuration\n");

		return ret;

	}



	/* Put DC field of STCCR to 1 (not zero) */

	ret = cpu_dai->ops->set_tdm_slot(cpu_dai, 0, 2);



	/* set the SSI system clock as input */

	ret = cpu_dai->ops->set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,

		SND_SOC_CLOCK_IN);

	if (ret < 0) {

		printk(KERN_ERR "Error when setting system SSI clk\n");

		return ret;

	}



	/* set codec BCLK division for sample rate */

	ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_BCLKDIV, bclk);

	if (ret < 0) {

		printk(KERN_ERR "Error when setting BCLK division\n");

		return ret;

	}





	/* codec PLL input is 25 MHz */

	ret = codec_dai->ops->set_pll(codec_dai, IGNORED_ARG,

					25000000, pll_out);

	if (ret < 0) {

		printk(KERN_ERR "Error when setting PLL input\n");

		return ret;

	}



	/*set codec MCLK division for sample rate */

	ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_MCLKDIV, mclk);

	if (ret < 0) {

		printk(KERN_ERR "Error when setting MCLK division\n");

		return ret;

	}



	return 0;

}



static int mx27vis_hifi_hw_free(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;



	/* disable the PLL */

	return codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, 0, 0);

}



/*

 * mx27vis WM8974 HiFi DAI opserations.

 */

static struct snd_soc_ops mx27vis_hifi_ops = {

	.hw_params = mx27vis_hifi_hw_params,

	.hw_free = mx27vis_hifi_hw_free,

};





static int mx27vis_suspend(struct platform_device *pdev, pm_message_t state)

{

	return 0;

}



static int mx27vis_resume(struct platform_device *pdev)

{

	return 0;

}



static int mx27vis_probe(struct platform_device *pdev)

{

	int ret = 0;



	ret = get_ssi_clk(0, &pdev->dev);



	if (ret < 0) {

		printk(KERN_ERR "%s: cant get ssi clock\n", __func__);

		return ret;

	}





	return 0;

}



static int mx27vis_remove(struct platform_device *pdev)

{

	put_ssi_clk(0);

	return 0;

}



static struct snd_soc_dai_link mx27vis_dai[] = {

{ /* Hifi Playback*/

	.name = "WM8974",

	.stream_name = "WM8974 HiFi",

	.cpu_dai = &imx_ssi_pcm_dai[0],

	.codec_dai = &wm8974_dai,

	.ops = &mx27vis_hifi_ops,

},

};



static struct snd_soc_card mx27vis = {

	.name = "mx27vis",

	.platform = &mx1_mx2_soc_platform,

	.probe = mx27vis_probe,

	.remove = mx27vis_remove,

	.suspend_pre = mx27vis_suspend,

	.resume_post = mx27vis_resume,

	.dai_link = mx27vis_dai,

	.num_links = ARRAY_SIZE(mx27vis_dai),

};



static struct snd_soc_device mx27vis_snd_devdata = {

	.card = &mx27vis,

	.codec_dev = &soc_codec_dev_wm8974,

};



static struct platform_device *mx27vis_snd_device;



/* Temporal definition of board specific behaviour */

void gpio_ssi_active(int ssi_num)

{

	int ret = 0;



	unsigned int ssi1_pins[] = {

		PC20_PF_SSI1_FS,

		PC21_PF_SSI1_RXD,

		PC22_PF_SSI1_TXD,

		PC23_PF_SSI1_CLK,

	};

	unsigned int ssi2_pins[] = {

		PC24_PF_SSI2_FS,

		PC25_PF_SSI2_RXD,

		PC26_PF_SSI2_TXD,

		PC27_PF_SSI2_CLK,

	};

	if (ssi_num == 0)

		ret = mxc_gpio_setup_multiple_pins(ssi1_pins,

				ARRAY_SIZE(ssi1_pins), "USB OTG");

	else

		ret = mxc_gpio_setup_multiple_pins(ssi2_pins,

				ARRAY_SIZE(ssi2_pins), "USB OTG");

	if (ret)

		printk(KERN_ERR "Error requesting ssi %x pins\n", ssi_num);

}





static int __init mx27vis_init(void)

{

	int ret;



	mx27vis_snd_device = platform_device_alloc("soc-audio", -1);

	if (!mx27vis_snd_device)

		return -ENOMEM;



	platform_set_drvdata(mx27vis_snd_device, &mx27vis_snd_devdata);

	mx27vis_snd_devdata.dev = &mx27vis_snd_device->dev;

	ret = platform_device_add(mx27vis_snd_device);



	if (ret) {

		printk(KERN_ERR "ASoC: Platform device allocation failed\n");

		platform_device_put(mx27vis_snd_device);

	}



	/* WM8974 uses SSI1 (HPCR1) via AUDMUX port 4 for audio (PPCR1) */

	gpio_ssi_active(0);

	audmux_connect_1_4();



	return ret;

}



static void __exit mx27vis_exit(void)

{

	/* We should call some "ssi_gpio_inactive()" properly */

}



module_init(mx27vis_init);

module_exit(mx27vis_exit);





MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com");

MODULE_DESCRIPTION("ALSA SoC WM8974 mx27vis");

MODULE_LICENSE("GPL");