From 38f426b8af844c8243b1cd5e6d883c176c527c3b Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Fri, 24 Jun 2022 14:41:08 +0100 Subject: [PATCH] pckbd: add QEMU interface comment for I8042 device This describes the I8042 device interface implemented within QEMU. Signed-off-by: Mark Cave-Ayland Message-Id: <20220624134109.881989-54-mark.cave-ayland@ilande.co.uk> Reviewed-by: Peter Maydell --- 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)