1*c6fd2f5fSJoe Komlodi #ifndef MOCK_TARGET_H_ 2*c6fd2f5fSJoe Komlodi #define MOCK_TARGET_H_ 3*c6fd2f5fSJoe Komlodi 4*c6fd2f5fSJoe Komlodi /* 5*c6fd2f5fSJoe Komlodi * Mock I3C Device 6*c6fd2f5fSJoe Komlodi * 7*c6fd2f5fSJoe Komlodi * Copyright (c) 2023 Google LLC 8*c6fd2f5fSJoe Komlodi * 9*c6fd2f5fSJoe Komlodi * The mock I3C device can be thought of as a simple EEPROM. It has a buffer, 10*c6fd2f5fSJoe Komlodi * and the pointer in the buffer is reset to 0 on an I3C STOP. 11*c6fd2f5fSJoe Komlodi * To write to the buffer, issue a private write and send data. 12*c6fd2f5fSJoe Komlodi * To read from the buffer, issue a private read. 13*c6fd2f5fSJoe Komlodi * 14*c6fd2f5fSJoe Komlodi * The mock target also supports sending target interrupt IBIs. 15*c6fd2f5fSJoe Komlodi * To issue an IBI, set the 'ibi-magic-num' property to a non-zero number, and 16*c6fd2f5fSJoe Komlodi * send that number in a private transaction. The mock target will issue an IBI 17*c6fd2f5fSJoe Komlodi * after 1 second. 18*c6fd2f5fSJoe Komlodi * 19*c6fd2f5fSJoe Komlodi * It also supports a handful of CCCs that are typically used when probing I3C 20*c6fd2f5fSJoe Komlodi * devices. 21*c6fd2f5fSJoe Komlodi * 22*c6fd2f5fSJoe Komlodi * This program is free software; you can redistribute it and/or modify it 23*c6fd2f5fSJoe Komlodi * under the terms of the GNU General Public License as published by the 24*c6fd2f5fSJoe Komlodi * Free Software Foundation; either version 2 of the License, or 25*c6fd2f5fSJoe Komlodi * (at your option) any later version. 26*c6fd2f5fSJoe Komlodi * 27*c6fd2f5fSJoe Komlodi * This program is distributed in the hope that it will be useful, but WITHOUT 28*c6fd2f5fSJoe Komlodi * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 29*c6fd2f5fSJoe Komlodi * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 30*c6fd2f5fSJoe Komlodi * for more details. 31*c6fd2f5fSJoe Komlodi */ 32*c6fd2f5fSJoe Komlodi 33*c6fd2f5fSJoe Komlodi #include "qemu/osdep.h" 34*c6fd2f5fSJoe Komlodi #include "qemu/timer.h" 35*c6fd2f5fSJoe Komlodi #include "hw/i3c/i3c.h" 36*c6fd2f5fSJoe Komlodi 37*c6fd2f5fSJoe Komlodi #define TYPE_MOCK_TARGET "mock-target" 38*c6fd2f5fSJoe Komlodi OBJECT_DECLARE_SIMPLE_TYPE(MockTargetState, MOCK_TARGET) 39*c6fd2f5fSJoe Komlodi 40*c6fd2f5fSJoe Komlodi struct MockTargetState { 41*c6fd2f5fSJoe Komlodi I3CTarget i3c; 42*c6fd2f5fSJoe Komlodi 43*c6fd2f5fSJoe Komlodi /* General device state */ 44*c6fd2f5fSJoe Komlodi bool can_ibi; 45*c6fd2f5fSJoe Komlodi QEMUTimer qtimer; 46*c6fd2f5fSJoe Komlodi size_t p_buf; 47*c6fd2f5fSJoe Komlodi uint8_t *buf; 48*c6fd2f5fSJoe Komlodi 49*c6fd2f5fSJoe Komlodi /* For Handing CCCs. */ 50*c6fd2f5fSJoe Komlodi bool in_ccc; 51*c6fd2f5fSJoe Komlodi I3CCCC curr_ccc; 52*c6fd2f5fSJoe Komlodi uint8_t ccc_byte_offset; 53*c6fd2f5fSJoe Komlodi 54*c6fd2f5fSJoe Komlodi struct { 55*c6fd2f5fSJoe Komlodi uint32_t buf_size; 56*c6fd2f5fSJoe Komlodi uint8_t ibi_magic; 57*c6fd2f5fSJoe Komlodi } cfg; 58*c6fd2f5fSJoe Komlodi }; 59*c6fd2f5fSJoe Komlodi 60*c6fd2f5fSJoe Komlodi #endif 61