Merge remote-tracking branch 'remotes/rth/tags/pull-arm-20211021' into staging
[qemu.git] / include / hw / adc / max111x.h
1 /*
2 * Maxim MAX1110/1111 ADC chip emulation.
3 *
4 * Copyright (c) 2006 Openedhand Ltd.
5 * Written by Andrzej Zaborowski <balrog@zabor.org>
6 *
7 * This code is licensed under the GNU GPLv2.
8 *
9 * Contributions after 2012-01-13 are licensed under the terms of the
10 * GNU GPL, version 2 or (at your option) any later version.
11 */
12
13 #ifndef HW_MISC_MAX111X_H
14 #define HW_MISC_MAX111X_H
15
16 #include "hw/ssi/ssi.h"
17 #include "qom/object.h"
18
19 /*
20 * This is a model of the Maxim MAX1110/1111 ADC chip, which for QEMU
21 * is an SSI slave device. It has either 4 (max1110) or 8 (max1111)
22 * 8-bit ADC channels.
23 *
24 * QEMU interface:
25 * + GPIO inputs 0..3 (for max1110) or 0..7 (for max1111): set the value
26 * of each ADC input, as an unsigned 8-bit value
27 * + GPIO output 0: interrupt line
28 * + Properties "input0" to "input3" (max1110) or "input0" to "input7"
29 * (max1111): initial reset values for ADC inputs.
30 *
31 * Known bugs:
32 * + the interrupt line is not correctly implemented, and will never
33 * be lowered once it has been asserted.
34 */
35 struct MAX111xState {
36 SSIPeripheral parent_obj;
37
38 qemu_irq interrupt;
39 /* Values of inputs at system reset (settable by QOM property) */
40 uint8_t reset_input[8];
41
42 uint8_t tb1, rb2, rb3;
43 int cycle;
44
45 uint8_t input[8];
46 int inputs, com;
47 };
48
49 #define TYPE_MAX_111X "max111x"
50
51 OBJECT_DECLARE_SIMPLE_TYPE(MAX111xState, MAX_111X)
52
53 #define TYPE_MAX_1110 "max1110"
54 #define TYPE_MAX_1111 "max1111"
55
56 #endif