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