2 * cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
4 * Copyright (C) 2014 Google, Inc.
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.
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.
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/>.
20 #ifndef _CROS_EC_DEV_H_
21 #define _CROS_EC_DEV_H_
23 #include <linux/ioctl.h>
24 #include <linux/types.h>
25 #include <linux/mfd/cros_ec.h>
27 #define CROS_EC_DEV_VERSION "1.0.0"
30 * @offset: within EC_LPC_ADDR_MEMMAP region
31 * @bytes: number of bytes to read. zero means "read a string" (including '\0')
32 * (at most only EC_MEMMAP_SIZE bytes can be read)
33 * @buffer: where to store the result
34 * ioctl returns the number of bytes read, negative on error
36 struct cros_ec_readmem {
39 uint8_t buffer[EC_MEMMAP_SIZE];
42 #define CROS_EC_DEV_IOC 0xEC
43 #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
44 #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
46 #endif /* _CROS_EC_DEV_H_ */