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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: Javier Martin <javier.martin@vista-silicon.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
javier Martin
Mark Brown
parent
9d8bc2968c
commit
2ccafed43a
3 changed files with 329 additions and 0 deletions
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@ -9,5 +9,13 @@ config SND_MX1_MX2_SOC
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config SND_MXC_SOC_SSI
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tristate
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config SND_SOC_MX27VIS_WM8974
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tristate "SoC Audio support for MX27 - WM8974 Visstrim_sm10 board"
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depends on SND_MX1_MX2_SOC && MACH_MX27 && MACH_IMX27_VISSTRIM_M10
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select SND_MXC_SOC_SSI
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select SND_SOC_WM8974
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help
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Say Y if you want to add support for SoC audio on Visstrim SM10
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board with WM8974.
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@ -4,3 +4,7 @@ snd-soc-mxc-ssi-objs := mxc-ssi.o
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obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o
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obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o
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# i.MX Machine Support
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snd-soc-mx27vis-wm8974-objs := mx27vis_wm8974.o
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obj-$(CONFIG_SND_SOC_MX27VIS_WM8974) += snd-soc-mx27vis-wm8974.o
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317
sound/soc/imx/mx27vis_wm8974.c
Normal file
317
sound/soc/imx/mx27vis_wm8974.c
Normal file
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@ -0,0 +1,317 @@
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/*
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* mx27vis_wm8974.c -- SoC audio for mx27vis
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*
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* Copyright 2009 Vista Silicon S.L.
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* Author: Javier Martin
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* javier.martin@vista-silicon.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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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/device.h>
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#include <linux/i2c.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include "../codecs/wm8974.h"
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#include "mx1_mx2-pcm.h"
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#include "mxc-ssi.h"
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#include <mach/gpio.h>
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#include <mach/iomux.h>
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#define IGNORED_ARG 0
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static struct snd_soc_card mx27vis;
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/**
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* This function connects SSI1 (HPCR1) as slave to
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* SSI1 external signals (PPCR1)
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* As slave, HPCR1 must set TFSDIR and TCLKDIR as inputs from
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* port 4
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*/
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void audmux_connect_1_4(void)
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{
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pr_debug("AUDMUX: normal operation mode\n");
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/* Reset HPCR1 and PPCR1 */
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DAM_HPCR1 = 0x00000000;
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DAM_PPCR1 = 0x00000000;
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/* set to synchronous */
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DAM_HPCR1 |= AUDMUX_HPCR_SYN;
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DAM_PPCR1 |= AUDMUX_PPCR_SYN;
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/* set Rx sources 1 <--> 4 */
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DAM_HPCR1 |= AUDMUX_HPCR_RXDSEL(3); /* port 4 */
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DAM_PPCR1 |= AUDMUX_PPCR_RXDSEL(0); /* port 1 */
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/* set Tx frame and Clock direction and source 4 --> 1 output */
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DAM_HPCR1 |= AUDMUX_HPCR_TFSDIR | AUDMUX_HPCR_TCLKDIR;
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DAM_HPCR1 |= AUDMUX_HPCR_TFCSEL(3); /* TxDS and TxCclk from port 4 */
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return;
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}
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static int mx27vis_hifi_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->dai->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
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unsigned int pll_out = 0, bclk = 0, fmt = 0, mclk = 0;
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int ret = 0;
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/*
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* The WM8974 is better at generating accurate audio clocks than the
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* MX27 SSI controller, so we will use it as master when we can.
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*/
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switch (params_rate(params)) {
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case 8000:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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mclk = WM8974_MCLKDIV_12;
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pll_out = 24576000;
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break;
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case 16000:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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pll_out = 12288000;
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break;
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case 48000:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_4;
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pll_out = 12288000;
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break;
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case 96000:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_2;
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pll_out = 12288000;
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break;
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case 11025:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_16;
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pll_out = 11289600;
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break;
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case 22050:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_8;
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pll_out = 11289600;
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break;
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case 44100:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_4;
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mclk = WM8974_MCLKDIV_2;
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pll_out = 11289600;
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break;
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case 88200:
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fmt = SND_SOC_DAIFMT_CBM_CFM;
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bclk = WM8974_BCLKDIV_2;
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pll_out = 11289600;
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break;
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}
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/* set codec DAI configuration */
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ret = codec_dai->ops->set_fmt(codec_dai,
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SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
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SND_SOC_DAIFMT_SYNC | fmt);
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if (ret < 0) {
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printk(KERN_ERR "Error from codec DAI configuration\n");
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return ret;
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}
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/* set cpu DAI configuration */
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ret = cpu_dai->ops->set_fmt(cpu_dai,
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SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_SYNC | fmt);
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if (ret < 0) {
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printk(KERN_ERR "Error from cpu DAI configuration\n");
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return ret;
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}
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/* Put DC field of STCCR to 1 (not zero) */
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ret = cpu_dai->ops->set_tdm_slot(cpu_dai, 0, 2);
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/* set the SSI system clock as input */
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ret = cpu_dai->ops->set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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printk(KERN_ERR "Error when setting system SSI clk\n");
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return ret;
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}
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/* set codec BCLK division for sample rate */
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ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_BCLKDIV, bclk);
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if (ret < 0) {
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printk(KERN_ERR "Error when setting BCLK division\n");
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return ret;
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}
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/* codec PLL input is 25 MHz */
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ret = codec_dai->ops->set_pll(codec_dai, IGNORED_ARG,
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25000000, pll_out);
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if (ret < 0) {
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printk(KERN_ERR "Error when setting PLL input\n");
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return ret;
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}
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/*set codec MCLK division for sample rate */
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ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_MCLKDIV, mclk);
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if (ret < 0) {
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printk(KERN_ERR "Error when setting MCLK division\n");
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return ret;
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}
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return 0;
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}
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static int mx27vis_hifi_hw_free(struct snd_pcm_substream *substream)
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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->dai->codec_dai;
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/* disable the PLL */
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return codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, 0, 0);
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}
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/*
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* mx27vis WM8974 HiFi DAI opserations.
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*/
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static struct snd_soc_ops mx27vis_hifi_ops = {
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.hw_params = mx27vis_hifi_hw_params,
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.hw_free = mx27vis_hifi_hw_free,
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};
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static int mx27vis_suspend(struct platform_device *pdev, pm_message_t state)
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{
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return 0;
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}
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static int mx27vis_resume(struct platform_device *pdev)
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{
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return 0;
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}
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static int mx27vis_probe(struct platform_device *pdev)
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{
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int ret = 0;
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ret = get_ssi_clk(0, &pdev->dev);
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if (ret < 0) {
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printk(KERN_ERR "%s: cant get ssi clock\n", __func__);
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return ret;
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}
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return 0;
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}
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static int mx27vis_remove(struct platform_device *pdev)
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{
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put_ssi_clk(0);
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return 0;
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}
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static struct snd_soc_dai_link mx27vis_dai[] = {
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{ /* Hifi Playback*/
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.name = "WM8974",
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.stream_name = "WM8974 HiFi",
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.cpu_dai = &imx_ssi_pcm_dai[0],
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.codec_dai = &wm8974_dai,
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.ops = &mx27vis_hifi_ops,
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},
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};
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static struct snd_soc_card mx27vis = {
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.name = "mx27vis",
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.platform = &mx1_mx2_soc_platform,
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.probe = mx27vis_probe,
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.remove = mx27vis_remove,
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.suspend_pre = mx27vis_suspend,
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.resume_post = mx27vis_resume,
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.dai_link = mx27vis_dai,
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.num_links = ARRAY_SIZE(mx27vis_dai),
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};
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static struct snd_soc_device mx27vis_snd_devdata = {
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.card = &mx27vis,
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.codec_dev = &soc_codec_dev_wm8974,
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};
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static struct platform_device *mx27vis_snd_device;
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/* Temporal definition of board specific behaviour */
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void gpio_ssi_active(int ssi_num)
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{
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int ret = 0;
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unsigned int ssi1_pins[] = {
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PC20_PF_SSI1_FS,
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PC21_PF_SSI1_RXD,
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PC22_PF_SSI1_TXD,
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PC23_PF_SSI1_CLK,
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};
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unsigned int ssi2_pins[] = {
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PC24_PF_SSI2_FS,
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PC25_PF_SSI2_RXD,
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PC26_PF_SSI2_TXD,
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PC27_PF_SSI2_CLK,
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};
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if (ssi_num == 0)
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ret = mxc_gpio_setup_multiple_pins(ssi1_pins,
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ARRAY_SIZE(ssi1_pins), "USB OTG");
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else
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ret = mxc_gpio_setup_multiple_pins(ssi2_pins,
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ARRAY_SIZE(ssi2_pins), "USB OTG");
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if (ret)
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printk(KERN_ERR "Error requesting ssi %x pins\n", ssi_num);
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}
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static int __init mx27vis_init(void)
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{
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int ret;
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mx27vis_snd_device = platform_device_alloc("soc-audio", -1);
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if (!mx27vis_snd_device)
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return -ENOMEM;
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platform_set_drvdata(mx27vis_snd_device, &mx27vis_snd_devdata);
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mx27vis_snd_devdata.dev = &mx27vis_snd_device->dev;
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ret = platform_device_add(mx27vis_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(mx27vis_snd_device);
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}
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/* WM8974 uses SSI1 (HPCR1) via AUDMUX port 4 for audio (PPCR1) */
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gpio_ssi_active(0);
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audmux_connect_1_4();
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return ret;
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}
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static void __exit mx27vis_exit(void)
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{
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/* We should call some "ssi_gpio_inactive()" properly */
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}
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module_init(mx27vis_init);
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module_exit(mx27vis_exit);
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MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com");
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MODULE_DESCRIPTION("ALSA SoC WM8974 mx27vis");
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MODULE_LICENSE("GPL");
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