drivers/mfd/cros_ec_dev.h

   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 #endif /* _CROS_EC_DEV_H_ */