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  */
27 struct 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_ */
39