summaryrefslogtreecommitdiffstats
path: root/drivers/extcon
diff options
context:
space:
mode:
authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-10 20:38:43 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-07 19:19:14 +0100
commitbbbd46e3d7fcdf1c8362bf1c83bcc08a93676cc9 (patch)
treee04d6a9cf0a59f0309d6eaae5a6be146bb5458de /drivers/extcon
parentextcon: arizona: Support additional configuration of microphone detection (diff)
downloadlinux-bbbd46e3d7fcdf1c8362bf1c83bcc08a93676cc9.tar.xz
linux-bbbd46e3d7fcdf1c8362bf1c83bcc08a93676cc9.zip
extcon: arizona: Use regulated mode for microphone supply when detecting
When starting microphone detection some headsets should be exposed to the fully regulated microphone bias in order to ensure that they behave in an optimal fashion. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/Kconfig2
-rw-r--r--drivers/extcon/extcon-arizona.c93
2 files changed, 94 insertions, 1 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 07122a9ef36e..9377050e5335 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -47,7 +47,7 @@ config EXTCON_MAX8997
config EXTCON_ARIZONA
tristate "Wolfson Arizona EXTCON support"
- depends on MFD_ARIZONA && INPUT
+ depends on MFD_ARIZONA && INPUT && SND_SOC
help
Say Y here to enable support for external accessory detection
with Wolfson Arizona devices. These are audio CODECs with
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index d7e1047ad68e..aa724314677a 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -27,6 +27,8 @@
#include <linux/regulator/consumer.h>
#include <linux/extcon.h>
+#include <sound/soc.h>
+
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
@@ -113,6 +115,52 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
}
+static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info)
+{
+ switch (info->micd_modes[0].bias >> ARIZONA_MICD_BIAS_SRC_SHIFT) {
+ case 1:
+ return "MICBIAS1";
+ case 2:
+ return "MICBIAS2";
+ case 3:
+ return "MICBIAS3";
+ default:
+ return "MICVDD";
+ }
+}
+
+static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
+ int ret;
+
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_force_enable_pin(dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to enable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+
+ if (!arizona->pdata.micd_force_micbias) {
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_disable_pin(arizona->dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to disable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+ }
+}
+
static void arizona_start_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
@@ -122,6 +170,15 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
/* Microphone detection can't use idle mode */
pm_runtime_get(info->dev);
+ if (info->detecting) {
+ ret = regulator_allow_bypass(info->micvdd, false);
+ if (ret != 0) {
+ dev_err(arizona->dev,
+ "Failed to regulate MICVDD: %d\n",
+ ret);
+ }
+ }
+
ret = regulator_enable(info->micvdd);
if (ret != 0) {
dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
@@ -138,6 +195,8 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
ARIZONA_ACCESSORY_DETECT_MODE_1,
ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
+ arizona_extcon_pulse_micbias(info);
+
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
&change);
@@ -150,18 +209,39 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
static void arizona_stop_mic(struct arizona_extcon_info *info)
{
struct arizona *arizona = info->arizona;
+ const char *widget = arizona_extcon_get_micbias(info);
+ struct snd_soc_dapm_context *dapm = arizona->dapm;
bool change;
+ int ret;
regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
ARIZONA_MICD_ENA, 0,
&change);
+ mutex_lock(&dapm->card->dapm_mutex);
+
+ ret = snd_soc_dapm_disable_pin(dapm, widget);
+ if (ret != 0)
+ dev_warn(arizona->dev,
+ "Failed to disable %s: %d\n",
+ widget, ret);
+
+ mutex_unlock(&dapm->card->dapm_mutex);
+
+ snd_soc_dapm_sync(dapm);
+
if (info->micd_reva) {
regmap_write(arizona->regmap, 0x80, 0x3);
regmap_write(arizona->regmap, 0x294, 2);
regmap_write(arizona->regmap, 0x80, 0x0);
}
+ ret = regulator_allow_bypass(info->micvdd, true);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
if (change) {
regulator_disable(info->micvdd);
pm_runtime_mark_last_busy(info->dev);
@@ -564,6 +644,8 @@ static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
info->hpdet_active = true;
+ arizona_extcon_pulse_micbias(info);
+
ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0x4000);
if (ret != 0)
dev_warn(arizona->dev, "Failed to do magic: %d\n", ret);
@@ -649,6 +731,13 @@ static irqreturn_t arizona_micdet(int irq, void *data)
dev_err(arizona->dev, "Headset report failed: %d\n",
ret);
+ /* Don't need to regulate for button detection */
+ ret = regulator_allow_bypass(info->micvdd, false);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
+ ret);
+ }
+
info->mic = true;
info->detecting = false;
goto handled;
@@ -716,6 +805,7 @@ static irqreturn_t arizona_micdet(int irq, void *data)
input_report_key(info->input,
arizona_lvl_to_key[i].report, 0);
input_sync(info->input);
+ arizona_extcon_pulse_micbias(info);
}
handled:
@@ -817,6 +907,9 @@ static int arizona_extcon_probe(struct platform_device *pdev)
int jack_irq_fall, jack_irq_rise;
int ret, mode, i;
+ if (!arizona->dapm || !arizona->dapm->card)
+ return -EPROBE_DEFER;
+
pdata = dev_get_platdata(arizona->dev);
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);