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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-04-12 00:00:36 -0700
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-04-13 10:02:06 -0700
commit68688e78ed4bc8d1a811ca29e2f8681561706db3 (patch)
tree1dabf09546d81a792b19e1b6b3874539afae06a2 /sound/soc/samsung
parentea3e98e75a6f38522450b66e22e34267977915ef (diff)
downloadop-kernel-dev-68688e78ed4bc8d1a811ca29e2f8681561706db3.zip
op-kernel-dev-68688e78ed4bc8d1a811ca29e2f8681561706db3.tar.gz
ASoC: Add Speyside headset jack detection support
Speyside makes use of support the WM8915 has for detecting the polarity of the microphone and ground connections on headsets, using a GPIO to control the polarity of the ground connection and switching between the two microphone bias supplies available on the device in order to do so. As a result of this the detection support is more involved than for most other CODECs, using a callback to configure the current polarity of the jack and translate this into the board-specific connections required for the current scenario. On Android some additional work is required to hook this up to the application layer as the Android HeadsetObserver monitors a custom drivers/switch API rather than the standard Linux APIs. This can be done by either updating HeadsetObserver or modifying the ALSA core to report via drivers/switch as well. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Liam Girdwood <lrg@ti.com>
Diffstat (limited to 'sound/soc/samsung')
-rw-r--r--sound/soc/samsung/speyside.c78
1 files changed, 77 insertions, 1 deletions
diff --git a/sound/soc/samsung/speyside.c b/sound/soc/samsung/speyside.c
index 0adaf7f..612a39e 100644
--- a/sound/soc/samsung/speyside.c
+++ b/sound/soc/samsung/speyside.c
@@ -11,10 +11,14 @@
#include <sound/soc.h>
#include <sound/soc-dapm.h>
+#include <sound/jack.h>
+#include <linux/gpio.h>
#include "../codecs/wm8915.h"
#include "../codecs/wm9081.h"
+#define WM8915_HPSEL_GPIO 214
+
static int speyside_set_bias_level(struct snd_soc_card *card,
enum snd_soc_bias_level level)
{
@@ -79,11 +83,74 @@ static struct snd_soc_ops speyside_ops = {
.hw_params = speyside_hw_params,
};
+static struct snd_soc_jack speyside_headset;
+
+/* Headset jack detection DAPM pins */
+static struct snd_soc_jack_pin speyside_headset_pins[] = {
+ {
+ .pin = "Headset Mic",
+ .mask = SND_JACK_MICROPHONE,
+ },
+ {
+ .pin = "Headphone",
+ .mask = SND_JACK_HEADPHONE,
+ },
+};
+
+/* Default the headphone selection to active high */
+static int speyside_jack_polarity;
+
+static int speyside_get_micbias(struct snd_soc_dapm_widget *source,
+ struct snd_soc_dapm_widget *sink)
+{
+ if (speyside_jack_polarity && (strcmp(source->name, "MICB1") == 0))
+ return 1;
+ if (!speyside_jack_polarity && (strcmp(source->name, "MICB2") == 0))
+ return 1;
+
+ return 0;
+}
+
+static void speyside_set_polarity(struct snd_soc_codec *codec,
+ int polarity)
+{
+ speyside_jack_polarity = !polarity;
+ gpio_direction_output(WM8915_HPSEL_GPIO, speyside_jack_polarity);
+
+ /* Re-run DAPM to make sure we're using the correct mic bias */
+ snd_soc_dapm_sync(&codec->dapm);
+}
+
static int speyside_wm8915_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dai *dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = rtd->codec;
+ int ret;
+
+ ret = snd_soc_dai_set_sysclk(dai, WM8915_SYSCLK_MCLK1, 32768, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = gpio_request(WM8915_HPSEL_GPIO, "HP_SEL");
+ if (ret != 0)
+ pr_err("Failed to request HP_SEL GPIO: %d\n", ret);
+ gpio_direction_output(WM8915_HPSEL_GPIO, speyside_jack_polarity);
- return snd_soc_dai_set_sysclk(dai, WM8915_SYSCLK_MCLK1, 32768, 0);
+ ret = snd_soc_jack_new(codec, "Headset",
+ SND_JACK_HEADSET | SND_JACK_BTN_0,
+ &speyside_headset);
+ if (ret)
+ return ret;
+
+ ret = snd_soc_jack_add_pins(&speyside_headset,
+ ARRAY_SIZE(speyside_headset_pins),
+ speyside_headset_pins);
+ if (ret)
+ return ret;
+
+ wm8915_detect(codec, &speyside_headset, speyside_set_polarity);
+
+ return 0;
}
static struct snd_soc_dai_link speyside_dai[] = {
@@ -125,6 +192,7 @@ static struct snd_soc_codec_conf speyside_codec_conf[] = {
static struct snd_soc_dapm_widget widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
+ SND_SOC_DAPM_MIC("Headset Mic", NULL),
SND_SOC_DAPM_SPK("Main Speaker", NULL),
@@ -133,7 +201,15 @@ static struct snd_soc_dapm_widget widgets[] = {
};
static struct snd_soc_dapm_route audio_paths[] = {
+ { "IN1RN", NULL, "MICB1" },
+ { "IN1RP", NULL, "MICB1" },
+ { "IN1RN", NULL, "MICB2" },
+ { "IN1RP", NULL, "MICB2" },
+ { "MICB1", NULL, "Headset Mic", speyside_get_micbias },
+ { "MICB2", NULL, "Headset Mic", speyside_get_micbias },
+
{ "IN1LP", NULL, "MICB2" },
+ { "IN1RN", NULL, "MICB1" },
{ "MICB2", NULL, "Main AMIC" },
{ "DMIC1DAT", NULL, "MICB1" },
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