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_VERSION "1.0.0"
28
29/**
30 * struct cros_ec_readmem - Struct used to read mapped memory.
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. The ioctl returns the number of bytes
35 * read or negative on error.
36 */
37struct 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_ */
48