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1ccea77e | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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2 | /* |
3 | * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace | |
4 | * | |
5 | * Copyright (C) 2014 Google, Inc. | |
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6 | */ |
7 | ||
8 | #ifndef _CROS_EC_DEV_H_ | |
9 | #define _CROS_EC_DEV_H_ | |
10 | ||
11 | #include <linux/ioctl.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/mfd/cros_ec.h> | |
14 | ||
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15 | #define CROS_EC_DEV_VERSION "1.0.0" |
16 | ||
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17 | /** |
18 | * struct cros_ec_readmem - Struct used to read mapped memory. | |
19 | * @offset: Within EC_LPC_ADDR_MEMMAP region. | |
20 | * @bytes: Number of bytes to read. Zero means "read a string" (including '\0') | |
21 | * At most only EC_MEMMAP_SIZE bytes can be read. | |
22 | * @buffer: Where to store the result. The ioctl returns the number of bytes | |
23 | * read or negative on error. | |
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24 | */ |
25 | struct cros_ec_readmem { | |
26 | uint32_t offset; | |
27 | uint32_t bytes; | |
28 | uint8_t buffer[EC_MEMMAP_SIZE]; | |
29 | }; | |
30 | ||
31 | #define CROS_EC_DEV_IOC 0xEC | |
32 | #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command) | |
33 | #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem) | |
34 | ||
35 | #endif /* _CROS_EC_DEV_H_ */ |