mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-13 23:34:05 +08:00
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
@ -9,5 +9,13 @@ config SND_MX1_MX2_SOC
|
||||
config SND_MXC_SOC_SSI
|
||||
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.
|
||||
|
||||
|
||||
|
||||
@ -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_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
|
||||
|
||||
317
sound/soc/imx/mx27vis_wm8974.c
Normal file
317
sound/soc/imx/mx27vis_wm8974.c
Normal file
@ -0,0 +1,317 @@
|
||||
/*
|
||||
* 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");
|
||||
Loading…
Reference in New Issue
Block a user