forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
|
|
* Maxim MAX1110/1111 ADC chip emulation.
|
|
*
|
|
* Copyright (c) 2006 Openedhand Ltd.
|
|
* Written by Andrzej Zaborowski <balrog@zabor.org>
|
|
*
|
|
* This code is licensed under the GNU GPLv2.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef HW_MISC_MAX111X_H
|
|
#define HW_MISC_MAX111X_H
|
|
|
|
#include "hw/ssi/ssi.h"
|
|
#include "qom/object.h"
|
|
|
|
/*
|
|
* This is a model of the Maxim MAX1110/1111 ADC chip, which for QEMU
|
|
* is an SSI slave device. It has either 4 (max1110) or 8 (max1111)
|
|
* 8-bit ADC channels.
|
|
*
|
|
* QEMU interface:
|
|
* + GPIO inputs 0..3 (for max1110) or 0..7 (for max1111): set the value
|
|
* of each ADC input, as an unsigned 8-bit value
|
|
* + GPIO output 0: interrupt line
|
|
* + Properties "input0" to "input3" (max1110) or "input0" to "input7"
|
|
* (max1111): initial reset values for ADC inputs.
|
|
*
|
|
* Known bugs:
|
|
* + the interrupt line is not correctly implemented, and will never
|
|
* be lowered once it has been asserted.
|
|
*/
|
|
struct MAX111xState {
|
|
SSIPeripheral parent_obj;
|
|
|
|
qemu_irq interrupt;
|
|
/* Values of inputs at system reset (settable by QOM property) */
|
|
uint8_t reset_input[8];
|
|
|
|
uint8_t tb1, rb2, rb3;
|
|
int cycle;
|
|
|
|
uint8_t input[8];
|
|
int inputs, com;
|
|
};
|
|
|
|
#define TYPE_MAX_111X "max111x"
|
|
|
|
OBJECT_DECLARE_SIMPLE_TYPE(MAX111xState, MAX_111X)
|
|
|
|
#define TYPE_MAX_1110 "max1110"
|
|
#define TYPE_MAX_1111 "max1111"
|
|
|
|
#endif
|