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Subject[PATCH 2/7] ASoC: neo1973_wm8753: Move lm4857 specefic code to its own module
Date
This patch moves the code for the lm4857 AMP from the neo1973_wm8753 sound
board driver to its own module.
The lm4857 is a generic AMP IC and not specific to the neo1973.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
sound/soc/codecs/Kconfig | 3 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/lm4857.c | 236 ++++++++++++++++++++++++++++++++++++
sound/soc/codecs/lm4857.h | 23 ++++
sound/soc/samsung/Kconfig | 1 +
sound/soc/samsung/lm4857.h | 32 -----
sound/soc/samsung/neo1973_wm8753.c | 195 +-----------------------------
7 files changed, 267 insertions(+), 225 deletions(-)
create mode 100644 sound/soc/codecs/lm4857.c
create mode 100644 sound/soc/codecs/lm4857.h
delete mode 100644 sound/soc/samsung/lm4857.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index e239345..3e10344 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -338,6 +338,9 @@ config SND_SOC_WM9713
tristate

# Amp
+config SND_SOC_LM4857
+ tristate
+
config SND_SOC_MAX9877
tristate

diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index ae10507..87ce9bd 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -75,6 +75,7 @@ snd-soc-wm-hubs-objs := wm_hubs.o
snd-soc-jz4740-codec-objs := jz4740.o

# Amp
+snd-soc-lm4857-objs := lm4857.o
snd-soc-max9877-objs := max9877.o
snd-soc-tpa6130a2-objs := tpa6130a2.o
snd-soc-wm2000-objs := wm2000.o
@@ -157,6 +158,7 @@ obj-$(CONFIG_SND_SOC_WM9713) += snd-soc-wm9713.o
obj-$(CONFIG_SND_SOC_WM_HUBS) += snd-soc-wm-hubs.o

# Amp
+obj-$(CONFIG_SND_SOC_LM4857) += snd-soc-lm4857.o
obj-$(CONFIG_SND_SOC_MAX9877) += snd-soc-max9877.o
obj-$(CONFIG_SND_SOC_TPA6130A2) += snd-soc-tpa6130a2.o
obj-$(CONFIG_SND_SOC_WM2000) += snd-soc-wm2000.o
diff --git a/sound/soc/codecs/lm4857.c b/sound/soc/codecs/lm4857.c
new file mode 100644
index 0000000..2d726c0
--- /dev/null
+++ b/sound/soc/codecs/lm4857.c
@@ -0,0 +1,236 @@
+/*
+ * LM4857 AMP driver
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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/i2c.h>
+
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#include "lm4857.h"
+
+static struct {
+ struct i2c_client *i2c;
+ uint8_t regs[4];
+ uint8_t state;
+} lm4857 = {
+ .regs = {0x00, 0x40, 0x80, 0xC0},
+};
+
+/* The register offsets in the cache array */
+#define LM4857_MVOL 0
+#define LM4857_LVOL 1
+#define LM4857_RVOL 2
+#define LM4857_CTRL 3
+
+/* the shifts required to set these bits */
+#define LM4857_3D 5
+#define LM4857_WAKEUP 5
+#define LM4857_EPGAIN 4
+
+static void lm4857_write_regs(void)
+{
+ if (!lm4857.i2c)
+ return;
+
+ if (i2c_master_send(lm4857.i2c, lm4857.regs, 4) != 4)
+ dev_err(&lm4857.i2c->dev, "lm4857: i2c write failed\n");
+}
+
+static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ int reg = mc->reg;
+ int shift = mc->shift;
+ int mask = mc->max;
+
+ ucontrol->value.integer.value[0] = (lm4857.regs[reg] >> shift) & mask;
+ return 0;
+}
+
+static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct soc_mixer_control *mc =
+ (struct soc_mixer_control *)kcontrol->private_value;
+ int reg = mc->reg;
+ int shift = mc->shift;
+ int mask = mc->max;
+
+ if (((lm4857.regs[reg] >> shift) & mask) ==
+ ucontrol->value.integer.value[0])
+ return 0;
+
+ lm4857.regs[reg] &= ~(mask << shift);
+ lm4857.regs[reg] |= ucontrol->value.integer.value[0] << shift;
+
+ lm4857_write_regs();
+
+ return 1;
+}
+
+static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ uint8_t value = lm4857.regs[LM4857_CTRL] & 0x0F;
+
+ if (value)
+ value -= 5;
+
+ ucontrol->value.integer.value[0] = value;
+
+ return 0;
+}
+
+static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ uint8_t value = ucontrol->value.integer.value[0];
+
+ if (value)
+ value += 5;
+
+ if ((lm4857.regs[LM4857_CTRL] & 0x0F) == value)
+ return 0;
+
+ lm4857.regs[LM4857_CTRL] &= 0xF0;
+ lm4857.regs[LM4857_CTRL] |= value;
+ lm4857_write_regs();
+ return 1;
+}
+
+static const char *lm4857_mode[] = {
+ "Off",
+ "Call Speaker",
+ "Stereo Speakers",
+ "Stereo Speakers + Headphones",
+ "Headphones"
+};
+
+static const struct soc_enum lm4857_mode_enum[] = {
+ SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
+};
+
+static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
+static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
+
+static const struct snd_kcontrol_new lm4857_controls[] = {
+ SOC_SINGLE_EXT_TLV("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
+ lm4857_get_reg, lm4857_set_reg, stereo_tlv),
+ SOC_SINGLE_EXT_TLV("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
+ lm4857_get_reg, lm4857_set_reg, stereo_tlv),
+ SOC_SINGLE_EXT_TLV("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
+ lm4857_get_reg, lm4857_set_reg, mono_tlv),
+ SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
+ lm4857_get_mode, lm4857_set_mode),
+ SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
+ lm4857_get_reg, lm4857_set_reg),
+ SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
+ lm4857_get_reg, lm4857_set_reg),
+ SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
+ lm4857_get_reg, lm4857_set_reg),
+ SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
+ lm4857_get_reg, lm4857_set_reg),
+};
+
+int lm4857_add_controls(struct snd_soc_codec *codec)
+{
+ return snd_soc_add_controls(codec, lm4857_controls,
+ ARRAY_SIZE(lm4857_controls));
+}
+EXPORT_SYMBOL_GPL(lm4857_add_controls);
+
+static int __devinit lm4857_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ lm4857.i2c = client;
+ lm4857_write_regs();
+ return 0;
+}
+
+static int __devexit lm4857_remove(struct i2c_client *client)
+{
+ lm4857.i2c = NULL;
+ return 0;
+}
+
+static void lm4857_shutdown(struct i2c_client *client)
+{
+ lm4857.regs[LM4857_CTRL] &= 0xF0;
+ lm4857_write_regs();
+}
+
+#ifdef CONFIG_PM
+
+static int lm4857_suspend(struct i2c_client *client, pm_message_t state)
+{
+ lm4857.state = lm4857.regs[LM4857_CTRL] & 0xF;
+
+ if (lm4857.state)
+ lm4857_shutdown(lm4857.i2c);
+
+ return 0;
+}
+
+static int lm4857_resume(struct i2c_client *dev)
+{
+ if (lm4857.state) {
+ lm4857.regs[LM4857_CTRL] |= (lm4857.state & 0x0F);
+ lm4857_write_regs();
+ }
+ return 0;
+}
+
+#else
+#define lm4857_suspend NULL
+#define lm4857_resume NULL
+#endif
+
+static const struct i2c_device_id lm4857_i2c_id[] = {
+ { "lm4857", 0 },
+ { }
+};
+
+static struct i2c_driver lm4857_i2c_driver = {
+ .driver = {
+ .name = "LM4857 I2C Amp",
+ .owner = THIS_MODULE,
+ },
+ .probe = lm4857_probe,
+ .remove = __devexit_p(lm4857_remove),
+ .suspend = lm4857_suspend,
+ .resume = lm4857_resume,
+ .shutdown = lm4857_shutdown,
+ .id_table = lm4857_i2c_id,
+};
+
+static int __init lm4857_init(void)
+{
+ return i2c_add_driver(&lm4857_i2c_driver);
+}
+module_init(lm4857_init);
+
+static void __exit lm4857_exit(void)
+{
+ i2c_del_driver(&lm4857_i2c_driver);
+}
+module_exit(lm4857_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("LM4857 amplifier driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/lm4857.h b/sound/soc/codecs/lm4857.h
new file mode 100644
index 0000000..9b28457
--- /dev/null
+++ b/sound/soc/codecs/lm4857.h
@@ -0,0 +1,23 @@
+/*
+ * lm4857.h -- ALSA Soc Audio Layer
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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
+ * 18th Jun 2007 Initial version.
+ */
+
+#ifndef LM4857_H_
+#define LM4857_H_
+
+int lm4857_add_controls(struct snd_soc_codec *codec);
+
+#endif /*LM4857_H_*/
+
diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig
index a6a6b5f..ba78e26 100644
--- a/sound/soc/samsung/Kconfig
+++ b/sound/soc/samsung/Kconfig
@@ -39,6 +39,7 @@ config SND_SOC_SAMSUNG_NEO1973_WM8753
depends on SND_SOC_SAMSUNG && MACH_NEO1973_GTA01
select SND_S3C24XX_I2S
select SND_SOC_WM8753
+ select SND_SOC_LM4857
help
Say Y if you want to add support for SoC audio on smdk2440
with the WM8753.
diff --git a/sound/soc/samsung/lm4857.h b/sound/soc/samsung/lm4857.h
deleted file mode 100644
index 0cf5b70..0000000
--- a/sound/soc/samsung/lm4857.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * lm4857.h -- ALSA Soc Audio Layer
- *
- * Copyright 2007 Wolfson Microelectronics PLC.
- * Author: Graeme Gregory
- * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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
- * 18th Jun 2007 Initial version.
- */
-
-#ifndef LM4857_H_
-#define LM4857_H_
-
-/* The register offsets in the cache array */
-#define LM4857_MVOL 0
-#define LM4857_LVOL 1
-#define LM4857_RVOL 2
-#define LM4857_CTRL 3
-
-/* the shifts required to set these bits */
-#define LM4857_3D 5
-#define LM4857_WAKEUP 5
-#define LM4857_EPGAIN 4
-
-#endif /*LM4857_H_*/
-
diff --git a/sound/soc/samsung/neo1973_wm8753.c b/sound/soc/samsung/neo1973_wm8753.c
index 1ea6e61..21e85b0 100644
--- a/sound/soc/samsung/neo1973_wm8753.c
+++ b/sound/soc/samsung/neo1973_wm8753.c
@@ -17,11 +17,9 @@
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
-#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
-#include <sound/tlv.h>

#include <asm/mach-types.h>
#include <mach/regs-clock.h>
@@ -33,12 +31,11 @@
#include <plat/regs-iis.h>

#include "../codecs/wm8753.h"
-#include "lm4857.h"
+#include "../codecs/lm4857.h"
#include "dma.h"
#include "s3c24xx-i2s.h"

static struct snd_soc_card neo1973;
-static struct i2c_client *i2c;

static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
@@ -213,83 +210,6 @@ static struct snd_soc_ops neo1973_voice_ops = {
.hw_free = neo1973_voice_hw_free,
};

-static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
-
-static void lm4857_write_regs(void)
-{
- pr_debug("Entered %s\n", __func__);
-
- if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
- printk(KERN_ERR "lm4857: i2c write failed\n");
-}
-
-static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct soc_mixer_control *mc =
- (struct soc_mixer_control *)kcontrol->private_value;
- int reg = mc->reg;
- int shift = mc->shift;
- int mask = mc->max;
-
- pr_debug("Entered %s\n", __func__);
-
- ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
- return 0;
-}
-
-static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct soc_mixer_control *mc =
- (struct soc_mixer_control *)kcontrol->private_value;
- int reg = mc->reg;
- int shift = mc->shift;
- int mask = mc->max;
-
- if (((lm4857_regs[reg] >> shift) & mask) ==
- ucontrol->value.integer.value[0])
- return 0;
-
- lm4857_regs[reg] &= ~(mask << shift);
- lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
- lm4857_write_regs();
- return 1;
-}
-
-static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
-
- pr_debug("Entered %s\n", __func__);
-
- if (value)
- value -= 5;
-
- ucontrol->value.integer.value[0] = value;
- return 0;
-}
-
-static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- u8 value = ucontrol->value.integer.value[0];
-
- pr_debug("Entered %s\n", __func__);
-
- if (value)
- value += 5;
-
- if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
- return 0;
-
- lm4857_regs[LM4857_CTRL] &= 0xF0;
- lm4857_regs[LM4857_CTRL] |= value;
- lm4857_write_regs();
- return 1;
-}
-
static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Audio Out", NULL),
SND_SOC_DAPM_LINE("GSM Line Out", NULL),
@@ -324,40 +244,6 @@ static const struct snd_soc_dapm_route dapm_routes[] = {
{"ACIN", NULL, "ACOP"},
};

-static const char *lm4857_mode[] = {
- "Off",
- "Call Speaker",
- "Stereo Speakers",
- "Stereo Speakers + Headphones",
- "Headphones"
-};
-
-static const struct soc_enum lm4857_mode_enum[] = {
- SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
-};
-
-static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
-static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
-
-static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
- SOC_SINGLE_EXT_TLV("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
- lm4857_get_reg, lm4857_set_reg, stereo_tlv),
- SOC_SINGLE_EXT_TLV("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
- lm4857_get_reg, lm4857_set_reg, stereo_tlv),
- SOC_SINGLE_EXT_TLV("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
- lm4857_get_reg, lm4857_set_reg, mono_tlv),
- SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
- lm4857_get_mode, lm4857_set_mode),
- SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
- lm4857_get_reg, lm4857_set_reg),
- SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
- lm4857_get_reg, lm4857_set_reg),
- SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
- lm4857_get_reg, lm4857_set_reg),
- SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
- lm4857_get_reg, lm4857_set_reg),
-};
-
/*
* This is an example machine initialisation for a wm8753 connected to a
* neo1973 II. It is missing logic to detect hp/mic insertions and logic
@@ -391,8 +277,7 @@ static int neo1973_wm8753_init(struct snd_soc_pcm_runtime *rtd)
snd_soc_dapm_disable_pin(codec, "Call Mic");

/* add neo1973 specific controls */
- err = snd_soc_add_controls(codec, wm8753_neo1973_controls,
- ARRAY_SIZE(8753_neo1973_controls));
+ err = lm4857_add_controls(codec);
if (err < 0)
return err;

@@ -449,79 +334,6 @@ static struct snd_soc_card neo1973 = {
.num_links = ARRAY_SIZE(neo1973_dai),
};

-static int lm4857_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- pr_debug("Entered %s\n", __func__);
-
- i2c = client;
-
- lm4857_write_regs();
- return 0;
-}
-
-static int lm4857_i2c_remove(struct i2c_client *client)
-{
- pr_debug("Entered %s\n", __func__);
-
- i2c = NULL;
-
- return 0;
-}
-
-static u8 lm4857_state;
-
-static int lm4857_suspend(struct i2c_client *dev, pm_message_t state)
-{
- pr_debug("Entered %s\n", __func__);
-
- dev_dbg(&dev->dev, "lm4857_suspend\n");
- lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf;
- if (lm4857_state) {
- lm4857_regs[LM4857_CTRL] &= 0xf0;
- lm4857_write_regs();
- }
- return 0;
-}
-
-static int lm4857_resume(struct i2c_client *dev)
-{
- pr_debug("Entered %s\n", __func__);
-
- if (lm4857_state) {
- lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f);
- lm4857_write_regs();
- }
- return 0;
-}
-
-static void lm4857_shutdown(struct i2c_client *dev)
-{
- pr_debug("Entered %s\n", __func__);
-
- dev_dbg(&dev->dev, "lm4857_shutdown\n");
- lm4857_regs[LM4857_CTRL] &= 0xf0;
- lm4857_write_regs();
-}
-
-static const struct i2c_device_id lm4857_i2c_id[] = {
- { "neo1973_lm4857", 0 },
- { }
-};
-
-static struct i2c_driver lm4857_i2c_driver = {
- .driver = {
- .name = "LM4857 I2C Amp",
- .owner = THIS_MODULE,
- },
- .suspend = lm4857_suspend,
- .resume = lm4857_resume,
- .shutdown = lm4857_shutdown,
- .probe = lm4857_i2c_probe,
- .remove = lm4857_i2c_remove,
- .id_table = lm4857_i2c_id,
-};
-
static struct platform_device *neo1973_snd_device;

static int __init neo1973_init(void)
@@ -548,8 +360,6 @@ static int __init neo1973_init(void)
return ret;
}

- ret = i2c_add_driver(&lm4857_i2c_driver);
-
if (ret != 0)
platform_device_unregister(neo1973_snd_device);

@@ -560,7 +370,6 @@ static void __exit neo1973_exit(void)
{
pr_debug("Entered %s\n", __func__);

- i2c_del_driver(&lm4857_i2c_driver);
platform_device_unregister(neo1973_snd_device);
}

--
1.7.2.3


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