1 #ifndef MOCK_I3C_TARGET_H_ 2 #define MOCK_I3C_TARGET_H_ 3 4 /* 5 * Mock I3C Device 6 * 7 * Copyright (c) 2025 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 * SPDX-License-Identifier: GPL-2.0-or-later 23 */ 24 25 #include "qemu/osdep.h" 26 #include "qemu/timer.h" 27 #include "hw/i3c/i3c.h" 28 29 #define TYPE_MOCK_I3C_TARGET "mock-i3c-target" 30 OBJECT_DECLARE_SIMPLE_TYPE(MockI3cTargetState, MOCK_I3C_TARGET) 31 32 struct MockI3cTargetState { 33 I3CTarget i3c; 34 35 /* General device state */ 36 bool can_ibi; 37 QEMUTimer qtimer; 38 size_t p_buf; 39 uint8_t *buf; 40 41 /* For Handing CCCs. */ 42 bool in_ccc; 43 I3CCCC curr_ccc; 44 uint8_t ccc_byte_offset; 45 46 struct { 47 uint32_t buf_size; 48 uint8_t ibi_magic; 49 } cfg; 50 }; 51 52 #endif 53