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Message-ID: <1331849267-30710-1-git-send-email-rklein@nvidia.com>
Date: Thu, 15 Mar 2012 15:07:47 -0700
From: Rhyland Klein <rklein@...dia.com>
To: Liam Girdwood <lrg@...com>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
<alsa-devel@...a-project.org>
CC: Peter Hsiang <cdefgab1288@...il.com>,
<linux-kernel@...r.kernel.org>, Rhyland Klein <rklein@...dia.com>
Subject: [PATCH v2] ASoC: max98095: add jack detection
This change adds the logic to support using the jack detect mechanism built
in to the codec to detect both when a jack was inserted and what type of
jack is present.
This change also supports the use of an external mechanism for headphone
detection. If this mechanism exists, when the max98095_jack_detect function
is called, the hp_jack is simply passed NULL.
This change supports both simple headphones, powered headphones, microphones
and headsets with both headphones and a mic.
v2:
- Removed useless function for irq_handler
- removed enable/disable irq
- Added pdata entry for jack detections slew rate
- get irq directly from dev
Signed-off-by: Rhyland Klein <rklein@...dia.com>
---
include/sound/max98095.h | 12 +++
sound/soc/codecs/max98095.c | 158 ++++++++++++++++++++++++++++++++++++++++++-
sound/soc/codecs/max98095.h | 22 ++++++
3 files changed, 191 insertions(+), 1 deletions(-)
diff --git a/include/sound/max98095.h b/include/sound/max98095.h
index 7513a42..65b1c90 100644
--- a/include/sound/max98095.h
+++ b/include/sound/max98095.h
@@ -49,6 +49,18 @@ struct max98095_pdata {
*/
unsigned int digmic_left_mode:1;
unsigned int digmic_right_mode:1;
+
+ /* Pin5 is the mechanical method of sensing jack insertion
+ * but it is something that might not be supported.
+ * 0 = PIN5 not supported
+ * 1 = PIN5 supported
+ */
+ int jack_detect_pin5en:1;
+
+ /* Slew amount for jack detection. Calculated as 4 * (delay + 1).
+ * Default delay is 24 to get a time of 100ms.
+ */
+ unsigned int jack_detect_delay;
};
#endif
diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c
index 0bb511a..0752840 100644
--- a/sound/soc/codecs/max98095.c
+++ b/sound/soc/codecs/max98095.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <asm/div64.h>
#include <sound/max98095.h>
+#include <sound/jack.h>
#include "max98095.h"
enum max98095_type {
@@ -51,6 +52,8 @@ struct max98095_priv {
u8 lin_state;
unsigned int mic1pre;
unsigned int mic2pre;
+ struct snd_soc_jack *headphone_jack;
+ struct snd_soc_jack *mic_jack;
};
static const u8 max98095_reg_def[M98095_REG_CNT] = {
@@ -2173,9 +2176,125 @@ static void max98095_handle_pdata(struct snd_soc_codec *codec)
max98095_handle_bq_pdata(codec);
}
+static irqreturn_t max98095_report_jack(int irq, void *data)
+{
+ struct snd_soc_codec *codec = data;
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+ unsigned int value;
+ int hp_report = 0;
+ int mic_report = 0;
+
+ /* Read the Jack Status Register */
+ value = snd_soc_read(codec, M98095_007_JACK_AUTO_STS);
+
+ /* If ddone is not set, then detection isn't finished yet */
+ if ((value & M98095_DDONE) == 0)
+ return IRQ_NONE;
+
+ /* if hp, check its bit, and if set, clear it */
+ if ((value & M98095_HP_IN || value & M98095_LO_IN) &&
+ max98095->headphone_jack)
+ hp_report |= SND_JACK_HEADPHONE;
+
+ /* if mic, check its bit, and if set, clear it */
+ if ((value & M98095_MIC_IN) && max98095->mic_jack)
+ mic_report |= SND_JACK_MICROPHONE;
+
+ if (max98095->headphone_jack == max98095->mic_jack) {
+ snd_soc_jack_report(max98095->headphone_jack,
+ hp_report | mic_report,
+ SND_JACK_HEADSET);
+ } else {
+ if (max98095->headphone_jack)
+ snd_soc_jack_report(max98095->headphone_jack,
+ hp_report, SND_JACK_HEADPHONE);
+ if (max98095->mic_jack)
+ snd_soc_jack_report(max98095->mic_jack,
+ mic_report, SND_JACK_MICROPHONE);
+ }
+
+ return IRQ_HANDLED;
+}
+
+int max98095_jack_detect_enable(struct snd_soc_codec *codec)
+{
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+ int ret = 0;
+ int detect_enable = M98095_JDEN;
+ unsigned int slew = M98095_DEFAULT_SLEW_DELAY;
+
+ if (max98095->pdata->jack_detect_pin5en)
+ detect_enable |= M98095_PIN5EN;
+
+ if (max98095->jack_detect_delay)
+ slew = max98095->jack_detect_delay;
+
+ ret = snd_soc_write(codec, M98095_08E_JACK_DC_SLEW, slew);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to cfg auto detect %d\n", ret);
+ return ret;
+ }
+
+ /* configure auto detection to be enabled */
+ ret = snd_soc_write(codec, M98095_089_JACK_DET_AUTO, detect_enable);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to cfg auto detect %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+int max98095_jack_detect_disable(struct snd_soc_codec *codec)
+{
+ int ret = 0;
+
+ /* configure auto detection to be disabled */
+ ret = snd_soc_write(codec, M98095_089_JACK_DET_AUTO, 0x0);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to cfg auto detect %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+int max98095_jack_detect(struct snd_soc_codec *codec,
+ struct snd_soc_jack *hp_jack, struct snd_soc_jack *mic_jack)
+{
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+ struct i2c_client *client = to_i2c_client(codec->dev);
+ int ret = 0;
+
+ max98095->headphone_jack = hp_jack;
+ max98095->mic_jack = mic_jack;
+
+ /* only progress if we have at least 1 jack pointer */
+ if (!hp_jack && !mic_jack)
+ return -EINVAL;
+
+ max98095_jack_detect_enable(codec);
+
+ /* enable interrupts for headphone jack detection */
+ ret = snd_soc_update_bits(codec, M98095_013_JACK_INT_EN,
+ M98095_IDDONE, M98095_IDDONE);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to cfg jack irqs %d\n", ret);
+ return ret;
+ }
+
+ max98095_report_jack(client->irq, codec);
+ return 0;
+}
+
#ifdef CONFIG_PM
static int max98095_suspend(struct snd_soc_codec *codec)
{
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+
+ if (max98095->headphone_jack || max98095->mic_jack)
+ max98095_jack_detect_disable(codec);
+
max98095_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
@@ -2183,8 +2302,16 @@ static int max98095_suspend(struct snd_soc_codec *codec)
static int max98095_resume(struct snd_soc_codec *codec)
{
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+ struct i2c_client *client = to_i2c_client(codec->dev);
+
max98095_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ if (max98095->headphone_jack || max98095->mic_jack) {
+ max98095_jack_detect_enable(codec);
+ max98095_report_jack(client->irq, codec);
+ }
+
return 0;
}
#else
@@ -2227,6 +2354,7 @@ static int max98095_probe(struct snd_soc_codec *codec)
{
struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
struct max98095_cdata *cdata;
+ struct i2c_client *client;
int ret = 0;
ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
@@ -2238,6 +2366,8 @@ static int max98095_probe(struct snd_soc_codec *codec)
/* reset the codec, the DSP core, and disable all interrupts */
max98095_reset(codec);
+ client = to_i2c_client(codec->dev);
+
/* initialize private data */
max98095->sysclk = (unsigned)-1;
@@ -2266,11 +2396,23 @@ static int max98095_probe(struct snd_soc_codec *codec)
max98095->mic1pre = 0;
max98095->mic2pre = 0;
+ if (client->irq) {
+ /* register an audio interrupt */
+ ret = request_threaded_irq(client->irq, NULL,
+ max98095_report_jack,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "max98095", codec);
+ if (ret) {
+ dev_err(codec->dev, "Failed to request IRQ: %d\n", ret);
+ goto err_access;
+ }
+ }
+
ret = snd_soc_read(codec, M98095_0FF_REV_ID);
if (ret < 0) {
dev_err(codec->dev, "Failure reading hardware revision: %d\n",
ret);
- goto err_access;
+ goto err_irq;
}
dev_info(codec->dev, "Hardware revision: %c\n", ret - 0x40 + 'A');
@@ -2306,14 +2448,28 @@ static int max98095_probe(struct snd_soc_codec *codec)
max98095_add_widgets(codec);
+ return 0;
+
+err_irq:
+ if (client->irq)
+ free_irq(client->irq, codec);
err_access:
return ret;
}
static int max98095_remove(struct snd_soc_codec *codec)
{
+ struct max98095_priv *max98095 = snd_soc_codec_get_drvdata(codec);
+ struct i2c_client *client = to_i2c_client(codec->dev);
+
max98095_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ if (max98095->headphone_jack || max98095->mic_jack)
+ max98095_jack_detect_disable(codec);
+
+ if (client->irq)
+ free_irq(client->irq, codec);
+
return 0;
}
diff --git a/sound/soc/codecs/max98095.h b/sound/soc/codecs/max98095.h
index 891584a..2ebbe4e 100644
--- a/sound/soc/codecs/max98095.h
+++ b/sound/soc/codecs/max98095.h
@@ -175,11 +175,23 @@
/* MAX98095 Registers Bit Fields */
+/* M98095_007_JACK_AUTO_STS */
+ #define M98095_MIC_IN (1<<3)
+ #define M98095_LO_IN (1<<5)
+ #define M98095_HP_IN (1<<6)
+ #define M98095_DDONE (1<<7)
+
/* M98095_00F_HOST_CFG */
#define M98095_SEG (1<<0)
#define M98095_XTEN (1<<1)
#define M98095_MDLLEN (1<<2)
+/* M98095_013_JACK_INT_EN */
+ #define M98095_IMIC_IN (1<<3)
+ #define M98095_ILO_IN (1<<5)
+ #define M98095_IHP_IN (1<<6)
+ #define M98095_IDDONE (1<<7)
+
/* M98095_027_DAI1_CLKMODE, M98095_031_DAI2_CLKMODE, M98095_03B_DAI3_CLKMODE */
#define M98095_CLKMODE_MASK 0xFF
@@ -255,6 +267,10 @@
#define M98095_EQ2EN (1<<1)
#define M98095_EQ1EN (1<<0)
+/* M98095_089_JACK_DET_AUTO */
+ #define M98095_PIN5EN (1<<2)
+ #define M98095_JDEN (1<<7)
+
/* M98095_090_PWR_EN_IN */
#define M98095_INEN (1<<7)
#define M98095_MB2EN (1<<3)
@@ -296,4 +312,10 @@
#define M98095_174_DAI1_BQ_BASE 0x74
#define M98095_17E_DAI2_BQ_BASE 0x7E
+/* Default Delay used in Slew Rate Calculation for Jack detection */
+#define M98095_DEFAULT_SLEW_DELAY 0x18
+
+extern int max98095_jack_detect(struct snd_soc_codec *codec,
+ struct snd_soc_jack *hp_jack, struct snd_soc_jack *mic_jack);
+
#endif
--
1.7.0.4
--
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