1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
4  */
5 
6 #ifndef __MESON_SM_H__
7 #define __MESON_SM_H__
8 
9 /**
10  * meson_sm_read_efuse - read efuse memory into buffer
11  *
12  * @offset: offset from the start efuse memory
13  * @buffer: pointer to buffer
14  * @size: number of bytes to read
15  * @return: number of bytes read
16  */
17 ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size);
18 
19 /**
20  * meson_sm_write_efuse - write into efuse memory from buffer
21  *
22  * @offset: offset from the start efuse memory
23  * @buffer: pointer to buffer
24  * @size: number of bytes to write
25  * @return: number of bytes written
26  */
27 ssize_t meson_sm_write_efuse(uintptr_t offset, void *buffer, size_t size);
28 
29 #define SM_SERIAL_SIZE	12
30 
31 /**
32  * meson_sm_get_serial - read chip unique id into buffer
33  *
34  * @buffer: pointer to buffer
35  * @size: buffer size.
36  * @return: zero on success or -errno on failure
37  */
38 int meson_sm_get_serial(void *buffer, size_t size);
39 
40 enum {
41 	REBOOT_REASON_COLD = 0,
42 	REBOOT_REASON_NORMAL = 1,
43 	REBOOT_REASON_RECOVERY = 2,
44 	REBOOT_REASON_UPDATE = 3,
45 	REBOOT_REASON_FASTBOOT = 4,
46 	REBOOT_REASON_SUSPEND_OFF = 5,
47 	REBOOT_REASON_HIBERNATE = 6,
48 	REBOOT_REASON_BOOTLOADER = 7,
49 	REBOOT_REASON_SHUTDOWN_REBOOT = 8,
50 	REBOOT_REASON_RPMBP = 9,
51 	REBOOT_REASON_CRASH_DUMP = 11,
52 	REBOOT_REASON_KERNEL_PANIC = 12,
53 	REBOOT_REASON_WATCHDOG_REBOOT = 13,
54 };
55 
56 /**
57  * meson_sm_get_reboot_reason - get reboot reason
58  */
59 int meson_sm_get_reboot_reason(void);
60 
61 #endif /* __MESON_SM_H__ */
62