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/* Copyright 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __UTIL_CROS_EC_DEV_H
#define __UTIL_CROS_EC_DEV_H
#include <linux/ioctl.h>
#include <linux/types.h>
#include "ec_commands.h"
#ifdef __cplusplus
extern "C" {
#endif
#define CROS_EC_DEV_NAME "cros_ec"
#define CROS_EC_DEV_VERSION "1.0.0"
/*
* @version: Command version number (often 0)
* @command: Command to send (EC_CMD_...)
* @outdata: Outgoing data to EC
* @outsize: Outgoing length in bytes
* @indata: Where to put the incoming data from EC
* @insize: On call, how much we can accept. On return, how much we got.
* @result: EC's response to the command (separate from communication failure)
* ioctl returns zero on success, negative on error
*/
struct cros_ec_command {
uint32_t version;
uint32_t command;
uint8_t *outdata;
uint32_t outsize;
uint8_t *indata;
uint32_t insize;
uint32_t result;
};
/*
* @offset: within EC_LPC_ADDR_MEMMAP region
* @bytes: number of bytes to read. zero means "read a string" (including '\0')
* (at most only EC_MEMMAP_SIZE bytes can be read)
* @buffer: where to store the result
* ioctl returns the number of bytes read, negative on error
*/
struct cros_ec_readmem {
uint32_t offset;
uint32_t bytes;
char *buffer;
};
#define CROS_EC_DEV_IOC ':'
#define CROS_EC_DEV_IOCXCMD _IOWR(':', 0, struct cros_ec_command)
#define CROS_EC_DEV_IOCRDMEM _IOWR(':', 1, struct cros_ec_readmem)
/*
* @version: Command version number (often 0)
* @command: Command to send (EC_CMD_...)
* @outsize: Outgoing length in bytes
* @insize: Max number of bytes to accept from EC
* @result: EC's response to the command (separate from communication failure)
* @data: Where to put the incoming data from EC and outgoing data to EC
*/
struct cros_ec_command_v2 {
uint32_t version;
uint32_t command;
uint32_t outsize;
uint32_t insize;
uint32_t result;
uint8_t data[0];
};
/*
* @offset: within EC_LPC_ADDR_MEMMAP region
* @bytes: number of bytes to read. zero means "read a string" (including '\0')
* (at most only EC_MEMMAP_SIZE bytes can be read)
* @buffer: where to store the result
* ioctl returns the number of bytes read, negative on error
*/
struct cros_ec_readmem_v2 {
uint32_t offset;
uint32_t bytes;
uint8_t buffer[EC_MEMMAP_SIZE];
};
#define CROS_EC_DEV_IOC_V2 0xEC
#define CROS_EC_DEV_IOCXCMD_V2 _IOWR(CROS_EC_DEV_IOC_V2, 0, \
struct cros_ec_command_v2)
#define CROS_EC_DEV_IOCRDMEM_V2 _IOWR(CROS_EC_DEV_IOC_V2, 1, \
struct cros_ec_readmem_v2)
#define CROS_EC_DEV_IOCEVENTMASK_V2 _IO(CROS_EC_DEV_IOC_V2, 2)
#ifdef __cplusplus
}
#endif
#endif /* __UTIL_CROS_EC_DEV_H */
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