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1 | /* |
2 | * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace | |
3 | * | |
4 | * Copyright (C) 2014 Google, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef _CROS_EC_DEV_H_ | |
21 | #define _CROS_EC_DEV_H_ | |
22 | ||
23 | #include <linux/ioctl.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/mfd/cros_ec.h> | |
26 | ||
27 | #define CROS_EC_DEV_NAME "cros_ec" | |
28 | #define CROS_EC_DEV_VERSION "1.0.0" | |
29 | ||
30 | /* | |
31 | * @offset: within EC_LPC_ADDR_MEMMAP region | |
32 | * @bytes: number of bytes to read. zero means "read a string" (including '\0') | |
33 | * (at most only EC_MEMMAP_SIZE bytes can be read) | |
34 | * @buffer: where to store the result | |
35 | * ioctl returns the number of bytes read, negative on error | |
36 | */ | |
37 | struct cros_ec_readmem { | |
38 | uint32_t offset; | |
39 | uint32_t bytes; | |
40 | uint8_t buffer[EC_MEMMAP_SIZE]; | |
41 | }; | |
42 | ||
43 | #define CROS_EC_DEV_IOC 0xEC | |
44 | #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command) | |
45 | #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem) | |
46 | ||
47 | #endif /* _CROS_EC_DEV_H_ */ |