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/*
* eti_b1_wm8731 -- SoC audio for Endrelia ETI_B1.
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
* Created: Mar 29, 2006
*
* Based on corgi.c by:
*
* Copyright 2005 Wolfson Microelectronics PLC.
* Copyright 2005 Openedhand Ltd.
*
* Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
* Richard Purdie <richard@openedhand.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.
*
* Revision history
* 30th Nov 2005 Initial version.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/arch/at91rm9200.h>
#include <asm/arch/gpio.h>
#include <asm/arch/hardware.h>
#include "../codecs/wm8731.h"
#include "at91rm9200-pcm.h"
#if 0
#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x)
#else
#define DBG(x...)
#endif
static struct clk *pck1_clk;
static struct clk *pllb_clk;
static int eti_b1_startup(snd_pcm_substream_t *substream)
{
/* Start PCK1 clock. */
clk_enable(pck1_clk);
DBG("pck1 started\n");
return 0;
}
static void eti_b1_shutdown(snd_pcm_substream_t *substream)
{
/* Stop PCK1 clock. */
clk_disable(pck1_clk);
DBG("pck1 stopped\n");
}
static struct snd_soc_ops eti_b1_ops = {
.startup = eti_b1_startup,
.shutdown = eti_b1_shutdown,
};
static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
SND_SOC_DAPM_MIC("Int Mic", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
};
static const char *intercon[][3] = {
/* speaker connected to LHPOUT */
{"Ext Spk", NULL, "LHPOUT"},
/* mic is connected to Mic Jack, with WM8731 Mic Bias */
{"MICIN", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Int Mic"},
/* terminator */
{NULL, NULL, NULL},
};
/*
* Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
*/
static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
{
int i;
DBG("eti_b1_wm8731_init() called\n");
/* Add specific widgets */
for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
}
/* Set up specific audio path interconnects */
for(i = 0; intercon[i][0] != NULL; i++) {
snd_soc_dapm_connect_input(codec, intercon[i][0],
intercon[i][1], intercon[i][2]);
}
/* not connected */
snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
/* always connected */
snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);
snd_soc_dapm_sync_endpoints(codec);
return 0;
}
unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
struct snd_soc_clock_info *info)
{
if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
}
return 0;
}
static struct snd_soc_dai_link eti_b1_dai = {
.name = "WM8731",
.stream_name = "WM8731",
.cpu_dai = &at91rm9200_i2s_dai[1],
.codec_dai = &wm8731_dai,
.init = eti_b1_wm8731_init,
.config_sysclk = eti_b1_config_sysclk,
};
static struct snd_soc_machine snd_soc_machine_eti_b1 = {
.name = "ETI_B1",
.dai_link = &eti_b1_dai,
.num_links = 1,
.ops = &eti_b1_ops,
};
static struct wm8731_setup_data eti_b1_wm8731_setup = {
.i2c_address = 0x1a,
};
static struct snd_soc_device eti_b1_snd_devdata = {
.machine = &snd_soc_machine_eti_b1,
.platform = &at91rm9200_soc_platform,
.codec_dev = &soc_codec_dev_wm8731,
.codec_data = &eti_b1_wm8731_setup,
};
static struct platform_device *eti_b1_snd_device;
static int __init eti_b1_init(void)
{
int ret;
u32 ssc_pio_lines;
eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
if (!eti_b1_snd_device)
return -ENOMEM;
platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
ret = platform_device_add(eti_b1_snd_device);
if (ret) {
platform_device_put(eti_b1_snd_device);
return ret;
}
ssc_pio_lines = AT91_PB6_TF1 | AT91_PB7_TK1 | AT91_PB8_TD1
| AT91_PB9_RD1 /* | AT91_PB10_RK1 | AT91_PB11_RF1 */;
/* Reset all PIO registers and assign lines to peripheral A */
at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines);
at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
/*
* Set PCK1 parent to PLLB and its rate to 12 Mhz.
*/
pllb_clk = clk_get(NULL, "pllb");
pck1_clk = clk_get(NULL, "pck1");
clk_set_parent(pck1_clk, pllb_clk);
clk_set_rate(pck1_clk, 12000000);
DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
/* assign the GPIO pin to PCK1 */
at91_set_B_periph(AT91_PIN_PA24, 0);
return ret;
}
static void __exit eti_b1_exit(void)
{
clk_put(pck1_clk);
clk_put(pllb_clk);
platform_device_unregister(eti_b1_snd_device);
}
module_init(eti_b1_init);
module_exit(eti_b1_exit);
/* Module information */
MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
MODULE_LICENSE("GPL");
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