ALSA: oxygen: add UART I/O functions

Add functions to allow model drivers to communicate with external chips
by doing I/O with the not-used-for-MIDI UART.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index f82a96290f72..19107c6307e5 100644
--- a/sound/pci/oxygen/oxygen.h
+++ b/sound/pci/oxygen/oxygen.h
@@ -79,6 +79,7 @@ struct oxygen_model {
         void (*update_dac_volume)(struct oxygen *chip);
         void (*update_dac_mute)(struct oxygen *chip);
         void (*gpio_changed)(struct oxygen *chip);
+        void (*uart_input)(struct oxygen *chip);
         void (*ac97_switch)(struct oxygen *chip,
                             unsigned int reg, unsigned int mute);
         const unsigned int *dac_tlv;
@@ -125,6 +126,8 @@ struct oxygen {
                 __le32 _32[OXYGEN_IO_SIZE / 4];
         } saved_registers;
         u16 saved_ac97_registers[2][0x40];
+        unsigned int uart_input_count;
+        u8 uart_input[32];
         struct oxygen_model model;
 };
 
@@ -174,6 +177,9 @@ void oxygen_write_ac97_masked(struct oxygen *chip, unsigned int codec,
 void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data);
 void oxygen_write_i2c(struct oxygen *chip, u8 device, u8 map, u8 data);
 
+void oxygen_reset_uart(struct oxygen *chip);
+void oxygen_write_uart(struct oxygen *chip, u8 data);
+
 static inline void oxygen_set_bits8(struct oxygen *chip,
                                     unsigned int reg, u8 value)
 {