[ALSA] soc - tlv320aic3x - add GPIO support

This patch adds support for AIC3x GPIO lines. They can be configured for
many possible functions as well as be driven manually. I also introduced
i2c read functionality since the GPIO state register has to be read from
hardware every time and can not be served from cache.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 48 insertions, 1 deletions

diff --git a/sound/soc/codecs/tlv320aic3x.h b/sound/soc/codecs/tlv320aic3x.h
index d49d001e6e4c..c1dd1ac0ceac 100644
--- a/sound/soc/codecs/tlv320aic3x.h
+++ b/sound/soc/codecs/tlv320aic3x.h
@@ -108,8 +108,14 @@
 #define DACR1_2_RLOPM_VOL               92
 #define LLOPM_CTRL                      86
 #define RLOPM_CTRL                      93
-/* Clock generation control register */
+/* GPIO/IRQ registers */
+#define AIC3X_STICKY_IRQ_FLAGS_REG      96
+#define AIC3X_RT_IRQ_FLAGS_REG          97
+#define AIC3X_GPIO1_REG                 98
+#define AIC3X_GPIO2_REG                 99
+#define AIC3X_GPIOA_REG                 100
 #define AIC3X_GPIOB_REG                 101
+/* Clock generation control register */
 #define AIC3X_CLKGEN_CTRL_REG           102
 
 /* Page select register bits */
@@ -175,8 +181,49 @@
 /* Default input volume */
 #define DEFAULT_GAIN    0x20
 
+/* GPIO API */
+enum {
+        AIC3X_GPIO1_FUNC_DISABLED               = 0,
+        AIC3X_GPIO1_FUNC_AUDIO_WORDCLK_ADC      = 1,
+        AIC3X_GPIO1_FUNC_CLOCK_MUX              = 2,
+        AIC3X_GPIO1_FUNC_CLOCK_MUX_DIV2         = 3,
+        AIC3X_GPIO1_FUNC_CLOCK_MUX_DIV4         = 4,
+        AIC3X_GPIO1_FUNC_CLOCK_MUX_DIV8         = 5,
+        AIC3X_GPIO1_FUNC_SHORT_CIRCUIT_IRQ      = 6,
+        AIC3X_GPIO1_FUNC_AGC_NOISE_IRQ          = 7,
+        AIC3X_GPIO1_FUNC_INPUT                  = 8,
+        AIC3X_GPIO1_FUNC_OUTPUT                 = 9,
+        AIC3X_GPIO1_FUNC_DIGITAL_MIC_MODCLK     = 10,
+        AIC3X_GPIO1_FUNC_AUDIO_WORDCLK          = 11,
+        AIC3X_GPIO1_FUNC_BUTTON_IRQ             = 12,
+        AIC3X_GPIO1_FUNC_HEADSET_DETECT_IRQ     = 13,
+        AIC3X_GPIO1_FUNC_HEADSET_DETECT_OR_BUTTON_IRQ   = 14,
+        AIC3X_GPIO1_FUNC_ALL_IRQ                = 16
+};
+
+enum {
+        AIC3X_GPIO2_FUNC_DISABLED               = 0,
+        AIC3X_GPIO2_FUNC_HEADSET_DETECT_IRQ     = 2,
+        AIC3X_GPIO2_FUNC_INPUT                  = 3,
+        AIC3X_GPIO2_FUNC_OUTPUT                 = 4,
+        AIC3X_GPIO2_FUNC_DIGITAL_MIC_INPUT      = 5,
+        AIC3X_GPIO2_FUNC_AUDIO_BITCLK           = 8,
+        AIC3X_GPIO2_FUNC_HEADSET_DETECT_OR_BUTTON_IRQ = 9,
+        AIC3X_GPIO2_FUNC_ALL_IRQ                = 10,
+        AIC3X_GPIO2_FUNC_SHORT_CIRCUIT_OR_AGC_IRQ = 11,
+        AIC3X_GPIO2_FUNC_HEADSET_OR_BUTTON_PRESS_OR_SHORT_CIRCUIT_IRQ = 12,
+        AIC3X_GPIO2_FUNC_SHORT_CIRCUIT_IRQ      = 13,
+        AIC3X_GPIO2_FUNC_AGC_NOISE_IRQ          = 14,
+        AIC3X_GPIO2_FUNC_BUTTON_PRESS_IRQ       = 15
+};
+
+void aic3x_set_gpio(struct snd_soc_codec *codec, int gpio, int state);
+int aic3x_get_gpio(struct snd_soc_codec *codec, int gpio);
+int aic3x_headset_detected(struct snd_soc_codec *codec);
+
 struct aic3x_setup_data {
         unsigned short i2c_address;
+        unsigned int gpio_func[2];
 };
 
 extern struct snd_soc_codec_dai aic3x_dai;