| | 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 | * struct cros_ec_readmem - Struct used to read mapped memory. |
| | 31 | * @offset: Within EC_LPC_ADDR_MEMMAP region. |
| | 32 | * @bytes: Number of bytes to read. Zero means "read a string" (including '\0') |
| | 33 | * At most only EC_MEMMAP_SIZE bytes can be read. |
| | 34 | * @buffer: Where to store the result. The ioctl returns the number of bytes |
| | 35 | * read or negative on error. |
| | 36 | */ |
| | 37 | struct cros_ec_readmem { |
| | 38 | uint32_t offset; |
| | 39 | uint32_t bytes; |
| | 40 | uint8_t buffer[EC_MEMMAP_SIZE]; |
| | 41 | }; |
| | 42 | |
| | 43 | #define CROS_EC_DEV_IOC 0xEC |
| | 44 | #define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command) |
| | 45 | #define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem) |
| | 46 | |
| | 47 | /* Lightbar utilities */ |
| | 48 | extern bool ec_has_lightbar(struct cros_ec_dev *ec); |
| | 49 | extern int lb_manual_suspend_ctrl(struct cros_ec_dev *ec, uint8_t enable); |
| | 50 | extern int lb_suspend(struct cros_ec_dev *ec); |
| | 51 | extern int lb_resume(struct cros_ec_dev *ec); |
| | 52 | |
| | 53 | #endif /* _CROS_EC_DEV_H_ */ |
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