max111x.h (1461B)
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