pckbd: add QEMU interface comment for I8042_MMIO device
This describes the I8042_MMIO device interface implemented within QEMU. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-Id: <20220624134109.881989-51-mark.cave-ayland@ilande.co.uk> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
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@ -52,6 +52,17 @@ struct ISAKBDState {
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uint8_t mouse_irq;
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};
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/*
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* QEMU interface:
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* + sysbus MMIO region 0: MemoryRegion defining the command/status/data
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* registers (access determined by mask property and access type)
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* + Named GPIO input "ps2-kbd-input-irq": set to 1 if the downstream PS2
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* keyboard device has asserted its irq
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* + Named GPIO input "ps2-mouse-input-irq": set to 1 if the downstream PS2
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* mouse device has asserted its irq
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* + Unnamed GPIO output 0-1: i8042 output irqs for keyboard (0) or mouse (1)
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*/
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#define TYPE_I8042_MMIO "i8042-mmio"
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OBJECT_DECLARE_SIMPLE_TYPE(MMIOKBDState, I8042_MMIO)
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