Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
4 *
5 * Copyright (C) 2014 Google, Inc.
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
15#define CROS_EC_DEV_VERSION "1.0.0"
16
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.
24 */
25struct 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_ */