LXR qemu/include/hw/misc/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 */
  35struct 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
  51OBJECT_DECLARE_SIMPLE_TYPE(MAX111xState, MAX_111X)
  52
  53#define TYPE_MAX_1110 "max1110"
  54#define TYPE_MAX_1111 "max1111"
  55
  56#endif
  57