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 * @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 35 */ 36 struct cros_ec_readmem { 37 uint32_t offset; 38 uint32_t bytes; 39 uint8_t buffer[EC_MEMMAP_SIZE]; 40 }; 41 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) 45 46 /* Lightbar utilities */ 47 extern bool ec_has_lightbar(struct cros_ec_dev *ec); 48 extern int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable); 49 extern int lb_suspend(struct cros_ec_dev *ec); 50 extern int lb_resume(struct cros_ec_dev *ec); 51 52 #endif /* _CROS_EC_DEV_H_ */ 53