cros_ec_chardev.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * ChromeOS EC device interface.
 4 *
 5 * Copyright (C) 2014 Google, Inc.
 6 */
 7
 8#ifndef _UAPI_LINUX_CROS_EC_DEV_H_
 9#define _UAPI_LINUX_CROS_EC_DEV_H_
10
11#include <linux/bits.h>
12#include <linux/ioctl.h>
13#include <linux/types.h>
14
15#include <linux/platform_data/cros_ec_commands.h>
16
17#define CROS_EC_DEV_VERSION "1.0.0"
18
19/**
20 * struct cros_ec_readmem - Struct used to read mapped memory.
21 * @offset: Within EC_LPC_ADDR_MEMMAP region.
22 * @bytes: Number of bytes to read. Zero means "read a string" (including '\0')
23 *         At most only EC_MEMMAP_SIZE bytes can be read.
24 * @buffer: Where to store the result. The ioctl returns the number of bytes
25 *         read or negative on error.
26 */
27struct cros_ec_readmem {
28	uint32_t offset;
29	uint32_t bytes;
30	uint8_t buffer[EC_MEMMAP_SIZE];
31};
32
33#define CROS_EC_DEV_IOC       0xEC
34#define CROS_EC_DEV_IOCXCMD   _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
35#define CROS_EC_DEV_IOCRDMEM  _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
36#define CROS_EC_DEV_IOCEVENTMASK _IO(CROS_EC_DEV_IOC, 2)
37
38#endif /* _CROS_EC_DEV_H_ */