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https://github.com/Telecominfraproject/OpenCellular.git
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2730daa567
The maximum packet / param size differs depending on interface and protocol version. Commands can now ask the comm interface what the limits are, and can use preallocated buffers to avoid needless malloc/free. BUG=chrome-os-partner:20571 BRANCH=none TEST=the following all work on link burn_my_ec ectool version ectool chargedump ectool console ectool i2cxfer 5 0x41 2 Change-Id: Ib847994da3f79721e7fb4e347231b9147a3f485f Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/60275
48 lines
1.4 KiB
C
48 lines
1.4 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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* For hysterical raisins, there are several mechanisms for communicating with
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* the EC. This abstracts them.
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*/
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#ifndef COMM_HOST_H
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#define COMM_HOST_H
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#include "common.h"
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#include "ec_commands.h"
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/* Maximum output and input sizes for EC command, in bytes */
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extern int ec_max_outsize, ec_max_insize;
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/*
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* Maximum-size output and input buffers, for use by callers. This saves each
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* caller needing to allocate/free its own buffers.
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*/
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extern void *ec_outbuf;
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extern void *ec_inbuf;
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/**
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* Perform initializations needed for subsequent requests
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*
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* returns 0 in case of success or error code. */
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int comm_init(void);
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/**
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* Send a command to the EC. Returns the length of output data returned (0 if
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* none), or negative on error.
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*/
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extern int (*ec_command)(int command, int version,
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const void *outdata, int outsize, /* to the EC */
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void *indata, int insize); /* from the EC */
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/**
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* Return the content of the EC information area mapped as "memory".
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* The offsets are defined by the EC_MEMMAP_ constants. Returns the number
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* of bytes read, or negative on error. Specifying bytes=0 will read a
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* string (always including the trailing '\0').
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*/
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extern int (*ec_readmem)(int offset, int bytes, void *dest);
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#endif /* COMM_HOST_H */
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