| 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 parent_obj; |
| 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 |