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kernel-fxtec-pro1x/sound/soc/codecs/jz4740.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

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/*
* Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc-dapm.h>
#include <sound/soc.h>
#define JZ4740_REG_CODEC_1 0x0
#define JZ4740_REG_CODEC_2 0x1
#define JZ4740_CODEC_1_LINE_ENABLE BIT(29)
#define JZ4740_CODEC_1_MIC_ENABLE BIT(28)
#define JZ4740_CODEC_1_SW1_ENABLE BIT(27)
#define JZ4740_CODEC_1_ADC_ENABLE BIT(26)
#define JZ4740_CODEC_1_SW2_ENABLE BIT(25)
#define JZ4740_CODEC_1_DAC_ENABLE BIT(24)
#define JZ4740_CODEC_1_VREF_DISABLE BIT(20)
#define JZ4740_CODEC_1_VREF_AMP_DISABLE BIT(19)
#define JZ4740_CODEC_1_VREF_PULLDOWN BIT(18)
#define JZ4740_CODEC_1_VREF_LOW_CURRENT BIT(17)
#define JZ4740_CODEC_1_VREF_HIGH_CURRENT BIT(16)
#define JZ4740_CODEC_1_HEADPHONE_DISABLE BIT(14)
#define JZ4740_CODEC_1_HEADPHONE_AMP_CHANGE_ANY BIT(13)
#define JZ4740_CODEC_1_HEADPHONE_CHARGE BIT(12)
#define JZ4740_CODEC_1_HEADPHONE_PULLDOWN (BIT(11) | BIT(10))
#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M BIT(9)
#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN BIT(8)
#define JZ4740_CODEC_1_SUSPEND BIT(1)
#define JZ4740_CODEC_1_RESET BIT(0)
#define JZ4740_CODEC_1_LINE_ENABLE_OFFSET 29
#define JZ4740_CODEC_1_MIC_ENABLE_OFFSET 28
#define JZ4740_CODEC_1_SW1_ENABLE_OFFSET 27
#define JZ4740_CODEC_1_ADC_ENABLE_OFFSET 26
#define JZ4740_CODEC_1_SW2_ENABLE_OFFSET 25
#define JZ4740_CODEC_1_DAC_ENABLE_OFFSET 24
#define JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET 14
#define JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET 8
#define JZ4740_CODEC_2_INPUT_VOLUME_MASK 0x1f0000
#define JZ4740_CODEC_2_SAMPLE_RATE_MASK 0x000f00
#define JZ4740_CODEC_2_MIC_BOOST_GAIN_MASK 0x000030
#define JZ4740_CODEC_2_HEADPHONE_VOLUME_MASK 0x000003
#define JZ4740_CODEC_2_INPUT_VOLUME_OFFSET 16
#define JZ4740_CODEC_2_SAMPLE_RATE_OFFSET 8
#define JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET 4
#define JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET 0
static const uint32_t jz4740_codec_regs[] = {
0x021b2302, 0x00170803,
};
struct jz4740_codec {
void __iomem *base;
struct resource *mem;
};
static unsigned int jz4740_codec_read(struct snd_soc_codec *codec,
unsigned int reg)
{
struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
return readl(jz4740_codec->base + (reg << 2));
}
static int jz4740_codec_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int val)
{
struct jz4740_codec *jz4740_codec = snd_soc_codec_get_drvdata(codec);
u32 *cache = codec->reg_cache;
cache[reg] = val;
writel(val, jz4740_codec->base + (reg << 2));
return 0;
}
static const struct snd_kcontrol_new jz4740_codec_controls[] = {
SOC_SINGLE("Master Playback Volume", JZ4740_REG_CODEC_2,
JZ4740_CODEC_2_HEADPHONE_VOLUME_OFFSET, 3, 0),
SOC_SINGLE("Master Capture Volume", JZ4740_REG_CODEC_2,
JZ4740_CODEC_2_INPUT_VOLUME_OFFSET, 31, 0),
SOC_SINGLE("Master Playback Switch", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_HEADPHONE_DISABLE_OFFSET, 1, 1),
SOC_SINGLE("Mic Capture Volume", JZ4740_REG_CODEC_2,
JZ4740_CODEC_2_MIC_BOOST_GAIN_OFFSET, 3, 0),
};
static const struct snd_kcontrol_new jz4740_codec_output_controls[] = {
SOC_DAPM_SINGLE("Bypass Switch", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SW1_ENABLE_OFFSET, 1, 0),
SOC_DAPM_SINGLE("DAC Switch", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SW2_ENABLE_OFFSET, 1, 0),
};
static const struct snd_kcontrol_new jz4740_codec_input_controls[] = {
SOC_DAPM_SINGLE("Line Capture Switch", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_LINE_ENABLE_OFFSET, 1, 0),
SOC_DAPM_SINGLE("Mic Capture Switch", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_MIC_ENABLE_OFFSET, 1, 0),
};
static const struct snd_soc_dapm_widget jz4740_codec_dapm_widgets[] = {
SND_SOC_DAPM_ADC("ADC", "Capture", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_ADC_ENABLE_OFFSET, 0),
SND_SOC_DAPM_DAC("DAC", "Playback", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_DAC_ENABLE_OFFSET, 0),
SND_SOC_DAPM_MIXER("Output Mixer", JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_OFFSET, 1,
jz4740_codec_output_controls,
ARRAY_SIZE(jz4740_codec_output_controls)),
SND_SOC_DAPM_MIXER_NAMED_CTL("Input Mixer", SND_SOC_NOPM, 0, 0,
jz4740_codec_input_controls,
ARRAY_SIZE(jz4740_codec_input_controls)),
SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_INPUT("MIC"),
SND_SOC_DAPM_INPUT("LIN"),
SND_SOC_DAPM_INPUT("RIN"),
};
static const struct snd_soc_dapm_route jz4740_codec_dapm_routes[] = {
{"Line Input", NULL, "LIN"},
{"Line Input", NULL, "RIN"},
{"Input Mixer", "Line Capture Switch", "Line Input"},
{"Input Mixer", "Mic Capture Switch", "MIC"},
{"ADC", NULL, "Input Mixer"},
{"Output Mixer", "Bypass Switch", "Input Mixer"},
{"Output Mixer", "DAC Switch", "DAC"},
{"LOUT", NULL, "Output Mixer"},
{"ROUT", NULL, "Output Mixer"},
};
static int jz4740_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
uint32_t val;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec =rtd->codec;
switch (params_rate(params)) {
case 8000:
val = 0;
break;
case 11025:
val = 1;
break;
case 12000:
val = 2;
break;
case 16000:
val = 3;
break;
case 22050:
val = 4;
break;
case 24000:
val = 5;
break;
case 32000:
val = 6;
break;
case 44100:
val = 7;
break;
case 48000:
val = 8;
break;
default:
return -EINVAL;
}
val <<= JZ4740_CODEC_2_SAMPLE_RATE_OFFSET;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_2,
JZ4740_CODEC_2_SAMPLE_RATE_MASK, val);
return 0;
}
static struct snd_soc_dai_ops jz4740_codec_dai_ops = {
.hw_params = jz4740_codec_hw_params,
};
static struct snd_soc_dai_driver jz4740_codec_dai = {
.name = "jz4740-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
},
.ops = &jz4740_codec_dai_ops,
.symmetric_rates = 1,
};
static void jz4740_codec_wakeup(struct snd_soc_codec *codec)
{
int i;
uint32_t *cache = codec->reg_cache;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_RESET, JZ4740_CODEC_1_RESET);
udelay(2);
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SUSPEND | JZ4740_CODEC_1_RESET, 0);
for (i = 0; i < ARRAY_SIZE(jz4740_codec_regs); ++i)
jz4740_codec_write(codec, i, cache[i]);
}
static int jz4740_codec_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
unsigned int mask;
unsigned int value;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
mask = JZ4740_CODEC_1_VREF_DISABLE |
JZ4740_CODEC_1_VREF_AMP_DISABLE |
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
value = 0;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
break;
case SND_SOC_BIAS_STANDBY:
/* The only way to clear the suspend flag is to reset the codec */
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
jz4740_codec_wakeup(codec);
mask = JZ4740_CODEC_1_VREF_DISABLE |
JZ4740_CODEC_1_VREF_AMP_DISABLE |
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
value = JZ4740_CODEC_1_VREF_DISABLE |
JZ4740_CODEC_1_VREF_AMP_DISABLE |
JZ4740_CODEC_1_HEADPHONE_POWERDOWN_M;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
break;
case SND_SOC_BIAS_OFF:
mask = JZ4740_CODEC_1_SUSPEND;
value = JZ4740_CODEC_1_SUSPEND;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1, mask, value);
break;
default:
break;
}
codec->dapm.bias_level = level;
return 0;
}
static int jz4740_codec_dev_probe(struct snd_soc_codec *codec)
{
struct snd_soc_dapm_context *dapm = &codec->dapm;
snd_soc_update_bits(codec, JZ4740_REG_CODEC_1,
JZ4740_CODEC_1_SW2_ENABLE, JZ4740_CODEC_1_SW2_ENABLE);
snd_soc_add_controls(codec, jz4740_codec_controls,
ARRAY_SIZE(jz4740_codec_controls));
snd_soc_dapm_new_controls(dapm, jz4740_codec_dapm_widgets,
ARRAY_SIZE(jz4740_codec_dapm_widgets));
snd_soc_dapm_add_routes(dapm, jz4740_codec_dapm_routes,
ARRAY_SIZE(jz4740_codec_dapm_routes));
snd_soc_dapm_new_widgets(codec);
jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int jz4740_codec_dev_remove(struct snd_soc_codec *codec)
{
jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int jz4740_codec_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_OFF);
}
static int jz4740_codec_resume(struct snd_soc_codec *codec)
{
return jz4740_codec_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
}
#else
#define jz4740_codec_suspend NULL
#define jz4740_codec_resume NULL
#endif
static struct snd_soc_codec_driver soc_codec_dev_jz4740_codec = {
.probe = jz4740_codec_dev_probe,
.remove = jz4740_codec_dev_remove,
.suspend = jz4740_codec_suspend,
.resume = jz4740_codec_resume,
.read = jz4740_codec_read,
.write = jz4740_codec_write,
.set_bias_level = jz4740_codec_set_bias_level,
.reg_cache_default = jz4740_codec_regs,
.reg_word_size = sizeof(u32),
.reg_cache_size = 2,
};
static int __devinit jz4740_codec_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_codec *jz4740_codec;
struct resource *mem;
jz4740_codec = kzalloc(sizeof(*jz4740_codec), GFP_KERNEL);
if (!jz4740_codec)
return -ENOMEM;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
ret = -ENOENT;
goto err_free_codec;
}
mem = request_mem_region(mem->start, resource_size(mem), pdev->name);
if (!mem) {
dev_err(&pdev->dev, "Failed to request mmio memory region\n");
ret = -EBUSY;
goto err_free_codec;
}
jz4740_codec->base = ioremap(mem->start, resource_size(mem));
if (!jz4740_codec->base) {
dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
ret = -EBUSY;
goto err_release_mem_region;
}
jz4740_codec->mem = mem;
platform_set_drvdata(pdev, jz4740_codec);
ret = snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_jz4740_codec, &jz4740_codec_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Failed to register codec\n");
goto err_iounmap;
}
return 0;
err_iounmap:
iounmap(jz4740_codec->base);
err_release_mem_region:
release_mem_region(mem->start, resource_size(mem));
err_free_codec:
kfree(jz4740_codec);
return ret;
}
static int __devexit jz4740_codec_remove(struct platform_device *pdev)
{
struct jz4740_codec *jz4740_codec = platform_get_drvdata(pdev);
struct resource *mem = jz4740_codec->mem;
snd_soc_unregister_codec(&pdev->dev);
iounmap(jz4740_codec->base);
release_mem_region(mem->start, resource_size(mem));
platform_set_drvdata(pdev, NULL);
kfree(jz4740_codec);
return 0;
}
static struct platform_driver jz4740_codec_driver = {
.probe = jz4740_codec_probe,
.remove = __devexit_p(jz4740_codec_remove),
.driver = {
.name = "jz4740-codec",
.owner = THIS_MODULE,
},
};
static int __init jz4740_codec_init(void)
{
return platform_driver_register(&jz4740_codec_driver);
}
module_init(jz4740_codec_init);
static void __exit jz4740_codec_exit(void)
{
platform_driver_unregister(&jz4740_codec_driver);
}
module_exit(jz4740_codec_exit);
MODULE_DESCRIPTION("JZ4740 SoC internal codec driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:jz4740-codec");
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