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d0d1564434
This is preparation for the common userspace EC interface. If/when that appears, this will be ready. BUG=chromium:239197 BRANCH=all TEST=manual Build, install, run it. Shouldn't be any change. Change-Id: I9fa78515ec5443ba659f10a66bbaadcb7f4802b0 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/56131
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef _CROS_EC_DEV_H_
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#define _CROS_EC_DEV_H_
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#define CROS_EC_DEV_NAME "cros_ec"
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#define CROS_EC_DEV_VERSION "1.0.0"
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/*
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* @version: Command version number (often 0)
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* @command: Command to send (EC_CMD_...)
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* @outdata: Outgoing data to EC
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* @outsize: Outgoing length in bytes
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* @indata: Where to put the incoming data from EC
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* @insize: Incoming length in bytes (filled in by EC)
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* @result: EC's response to the command (separate from communication failure)
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* ioctl returns zero on success, negative on error
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*/
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struct cros_ec_command {
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uint32_t version;
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uint32_t command;
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uint8_t *outdata;
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uint32_t outsize;
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uint8_t *indata;
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uint32_t insize;
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uint32_t result;
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};
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/*
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* @offset: within EC_LPC_ADDR_MEMMAP region
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* @bytes: number of bytes to read. zero means "read a string" (including '\0')
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* (at most only EC_MEMMAP_SIZE bytes can be read)
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* @buffer: where to store the result
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* ioctl returns the number of bytes read, negative on error
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*/
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struct cros_ec_readmem {
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uint32_t offset;
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uint32_t bytes;
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char *buffer;
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};
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#define CROS_EC_DEV_IOC ':'
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#define CROS_EC_DEV_IOCXCMD _IOWR(':', 0, struct cros_ec_command)
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#define CROS_EC_DEV_IOCRDMEM _IOWR(':', 1, struct cros_ec_readmem)
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#endif /* _CROS_EC_DEV_H_ */
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