kernel_optimize_test/sound/soc/sh/migor.c
Liam Girdwood ce6120cca2 ASoC: Decouple DAPM from CODECs
Decoupling Dynamic Audio Power Management (DAPM) from codec devices is
required when developing ASoC further. Such as for other ASoC components to
have DAPM widgets or when extending DAPM to handle cross-device paths.

This patch decouples DAPM related variables from struct snd_soc_codec and
moves them to new struct snd_soc_dapm_context that is used to encapsulate
DAPM context of a device. ASoC core and API of DAPM functions are modified
to use DAPM context instead of codec.

This patch does not change current functionality and a large part of changes
come because of structure and internal API changes.

Core implementation is from Liam Girdwood <lrg@slimlogic.co.uk> with some
minor core changes, codecs and machine driver conversions from
Jarkko Nikula <jhnikula@gmail.com>.

Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Mike Frysinger <vapier.adi@gmail.com>
Cc: Cliff Cai <cliff.cai@analog.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Ryan Mallon <ryan@bluewatersys.com>
Cc: Timur Tabi <timur@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jassi Brar <jassi.brar@samsung.com>
Cc: Daniel Gloeckner <dg@emlix.com>
Cc: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2010-11-06 11:28:29 -04:00

226 lines
5.3 KiB
C

/*
* ALSA SoC driver for Migo-R
*
* Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <asm/clkdev.h>
#include <asm/clock.h>
#include <cpu/sh7722.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "../codecs/wm8978.h"
#include "siu.h"
/* Default 8000Hz sampling frequency */
static unsigned long codec_freq = 8000 * 512;
static unsigned int use_count;
/* External clock, sourced from the codec at the SIUMCKB pin */
static unsigned long siumckb_recalc(struct clk *clk)
{
return codec_freq;
}
static struct clk_ops siumckb_clk_ops = {
.recalc = siumckb_recalc,
};
static struct clk siumckb_clk = {
.ops = &siumckb_clk_ops,
.rate = 0, /* initialised at run-time */
};
static struct clk_lookup *siumckb_lookup;
static int migor_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;
int ret;
unsigned int rate = params_rate(params);
ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_NB_IF |
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(rtd->cpu_dai, SND_SOC_DAIFMT_NB_IF |
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
codec_freq = rate * 512;
/*
* This propagates the parent frequency change to children and
* recalculates the frequency table
*/
clk_set_rate(&siumckb_clk, codec_freq);
dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);
ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, SIU_CLKB_EXT,
codec_freq / 2, SND_SOC_CLOCK_IN);
if (!ret)
use_count++;
return ret;
}
static int migor_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
if (use_count) {
use_count--;
if (!use_count)
snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,
SND_SOC_CLOCK_IN);
} else {
dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");
}
return 0;
}
static struct snd_soc_ops migor_dai_ops = {
.hw_params = migor_hw_params,
.hw_free = migor_hw_free,
};
static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("Onboard Microphone", NULL),
SND_SOC_DAPM_MIC("External Microphone", NULL),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Headphone output connected to LHP/RHP, enable OUT4 for VMID */
{ "Headphone", NULL, "OUT4 VMID" },
{ "OUT4 VMID", NULL, "LHP" },
{ "OUT4 VMID", NULL, "RHP" },
/* On-board microphone */
{ "RMICN", NULL, "Mic Bias" },
{ "RMICP", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "Onboard Microphone" },
/* External microphone */
{ "LMICN", NULL, "Mic Bias" },
{ "LMICP", NULL, "Mic Bias" },
{ "Mic Bias", NULL, "External Microphone" },
};
static int migor_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
snd_soc_dapm_new_controls(dapm, migor_dapm_widgets,
ARRAY_SIZE(migor_dapm_widgets));
snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
return 0;
}
/* migor digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link migor_dai = {
.name = "wm8978",
.stream_name = "WM8978",
.cpu_dai_name = "siu-i2s-dai",
.codec_dai_name = "wm8978-hifi",
.platform_name = "siu-pcm-audio",
.codec_name = "wm8978.0-001a",
.ops = &migor_dai_ops,
.init = migor_dai_init,
};
/* migor audio machine driver */
static struct snd_soc_card snd_soc_migor = {
.name = "Migo-R",
.dai_link = &migor_dai,
.num_links = 1,
};
static struct platform_device *migor_snd_device;
static int __init migor_init(void)
{
int ret;
ret = clk_register(&siumckb_clk);
if (ret < 0)
return ret;
siumckb_lookup = clkdev_alloc(&siumckb_clk, "siumckb_clk", NULL);
if (!siumckb_lookup) {
ret = -ENOMEM;
goto eclkdevalloc;
}
clkdev_add(siumckb_lookup);
/* Port number used on this machine: port B */
migor_snd_device = platform_device_alloc("soc-audio", 1);
if (!migor_snd_device) {
ret = -ENOMEM;
goto epdevalloc;
}
platform_set_drvdata(migor_snd_device, &snd_soc_migor);
ret = platform_device_add(migor_snd_device);
if (ret)
goto epdevadd;
return 0;
epdevadd:
platform_device_put(migor_snd_device);
epdevalloc:
clkdev_drop(siumckb_lookup);
eclkdevalloc:
clk_unregister(&siumckb_clk);
return ret;
}
static void __exit migor_exit(void)
{
clkdev_drop(siumckb_lookup);
clk_unregister(&siumckb_clk);
platform_device_unregister(migor_snd_device);
}
module_init(migor_init);
module_exit(migor_exit);
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_DESCRIPTION("ALSA SoC Migor");
MODULE_LICENSE("GPL v2");