3029681235
Create a header file for the hw/misc/max111x device, in the usual modern style for QOM devices: * definition of the TYPE_ constants and macros * definition of the device's state struct so that it can be embedded in other structs if desired * documentation of the interface This allows us to use TYPE_MAX_1111 in the spitz.c code rather than the string "max1111". Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20200628142429.17111-12-peter.maydell@linaro.org
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* Maxim MAX1110/1111 ADC chip emulation.
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*
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* Copyright (c) 2006 Openedhand Ltd.
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* Written by Andrzej Zaborowski <balrog@zabor.org>
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*
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* This code is licensed under the GNU GPLv2.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#ifndef HW_MISC_MAX111X_H
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#define HW_MISC_MAX111X_H
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#include "hw/ssi/ssi.h"
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/*
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* This is a model of the Maxim MAX1110/1111 ADC chip, which for QEMU
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* is an SSI slave device. It has either 4 (max1110) or 8 (max1111)
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* 8-bit ADC channels.
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*
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* QEMU interface:
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* + GPIO inputs 0..3 (for max1110) or 0..7 (for max1111): set the value
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* of each ADC input, as an unsigned 8-bit value
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* + GPIO output 0: interrupt line
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* + Properties "input0" to "input3" (max1110) or "input0" to "input7"
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* (max1111): initial reset values for ADC inputs.
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*
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* Known bugs:
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* + the interrupt line is not correctly implemented, and will never
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* be lowered once it has been asserted.
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*/
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typedef struct {
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SSISlave parent_obj;
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qemu_irq interrupt;
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/* Values of inputs at system reset (settable by QOM property) */
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uint8_t reset_input[8];
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uint8_t tb1, rb2, rb3;
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int cycle;
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uint8_t input[8];
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int inputs, com;
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} MAX111xState;
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#define TYPE_MAX_111X "max111x"
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#define MAX_111X(obj) \
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OBJECT_CHECK(MAX111xState, (obj), TYPE_MAX_111X)
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#define TYPE_MAX_1110 "max1110"
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#define TYPE_MAX_1111 "max1111"
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#endif
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