This describes the I8042 device interface implemented within QEMU.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayl...@ilande.co.uk>
Message-Id: <20220624134109.881989-54-mark.cave-ayl...@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
include/hw/input/i8042.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h
index d4747b62b8..ca933d8e1b 100644
--- a/include/hw/input/i8042.h
+++ b/include/hw/input/i8042.h
@@ -39,6 +39,16 @@ typedef struct KBDState {
hwaddr mask;
} KBDState;
+/*
+ * QEMU interface:
+ * + Named GPIO input "ps2-kbd-input-irq": set to 1 if the downstream PS2
+ * keyboard device has asserted its irq
+ * + Named GPIO input "ps2-mouse-input-irq": set to 1 if the downstream PS2
+ * mouse device has asserted its irq
+ * + Named GPIO output "a20": A20 line for x86 PCs
+ * + Unnamed GPIO output 0-1: i8042 output irqs for keyboard (0) or mouse (1)
+ */
+
#define TYPE_I8042 "i8042"
OBJECT_DECLARE_SIMPLE_TYPE(ISAKBDState, I8042)
--
2.30.2
