mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-29 18:11:05 +00:00
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
94 lines
1.9 KiB
C
94 lines
1.9 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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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "comm-host.h"
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#include "ec_commands.h"
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int (*ec_command)(int command, int version,
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const void *outdata, int outsize,
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void *indata, int insize);
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int (*ec_readmem)(int offset, int bytes, void *dest);
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int ec_max_outsize, ec_max_insize;
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void *ec_outbuf;
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void *ec_inbuf;
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int comm_init_dev(void) __attribute__((weak));
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int comm_init_lpc(void) __attribute__((weak));
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int comm_init_i2c(void) __attribute__((weak));
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static int fake_readmem(int offset, int bytes, void *dest)
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{
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struct ec_params_read_memmap p;
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int c;
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char *buf;
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p.offset = offset;
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if (bytes) {
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p.size = bytes;
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c = ec_command(EC_CMD_READ_MEMMAP, 0, &p, sizeof(p),
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dest, p.size);
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if (c < 0)
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return c;
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return p.size;
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}
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p.size = EC_MEMMAP_TEXT_MAX;
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c = ec_command(EC_CMD_READ_MEMMAP, 0, &p, sizeof(p), dest, p.size);
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if (c < 0)
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return c;
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buf = dest;
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for (c = 0; c < EC_MEMMAP_TEXT_MAX; c++) {
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if (buf[c] == 0)
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return c;
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}
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buf[EC_MEMMAP_TEXT_MAX - 1] = 0;
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return EC_MEMMAP_TEXT_MAX - 1;
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}
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int comm_init(void)
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{
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/* Default memmap access */
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ec_readmem = fake_readmem;
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/* Prefer new /dev method */
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if (comm_init_dev && !comm_init_dev())
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goto init_ok;
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/* Fallback to direct LPC on x86 */
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if (comm_init_lpc && !comm_init_lpc())
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goto init_ok;
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/* Fallback to direct i2c on ARM */
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if (comm_init_i2c && !comm_init_i2c())
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goto init_ok;
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/* Give up */
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fprintf(stderr, "Unable to establish host communication\n");
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return 1;
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init_ok:
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/* Allocate shared I/O buffers */
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ec_outbuf = malloc(ec_max_outsize);
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ec_inbuf = malloc(ec_max_insize);
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if (!ec_outbuf || !ec_inbuf) {
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fprintf(stderr, "Unable to allocate buffers\n");
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return 1;
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}
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return 0;
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}
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