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/* Copyright (c) 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.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "cros_ec_dev.h"
#include "comm-host.h"
#include "ec_commands.h"
static int fd = -1;
static int ec_command_dev(int command, int version,
const void *outdata, int outsize,
void *indata, int insize)
{
struct cros_ec_command s_cmd;
int r;
s_cmd.command = command;
s_cmd.version = version;
s_cmd.result = 0xff;
s_cmd.outsize = outsize;
s_cmd.outdata = (uint8_t *)outdata;
s_cmd.insize = insize;
s_cmd.indata = indata;
r = ioctl(fd, CROS_EC_DEV_IOCXCMD, &s_cmd);
if (r < 0) {
fprintf(stderr, "ioctl %d, errno %d (%s), EC result %d\n",
r, errno, strerror(errno), s_cmd.result);
return r;
}
if (s_cmd.result != EC_RES_SUCCESS)
fprintf(stderr, "EC result %d\n", s_cmd.result);
return s_cmd.insize;
}
static int ec_readmem_dev(int offset, int bytes, void *dest)
{
struct cros_ec_readmem s_mem;
s_mem.offset = offset;
s_mem.bytes = bytes;
s_mem.buffer = dest;
return ioctl(fd, CROS_EC_DEV_IOCRDMEM, &s_mem);
}
int comm_init_dev(void)
{
char version[80];
int r;
char *s;
fd = open("/dev/" CROS_EC_DEV_NAME, O_RDWR);
if (fd < 0)
return 1;
r = read(fd, version, sizeof(version)-1);
if (r <= 0) {
close(fd);
return 2;
}
version[r] = '\0';
s = strchr(version, '\n');
if (s)
*s = '\0';
if (strcmp(version, CROS_EC_DEV_VERSION)) {
close(fd);
return 3;
}
ec_command = ec_command_dev;
if (ec_readmem_dev(EC_MEMMAP_ID, 2, version) == 2)
ec_readmem = ec_readmem_dev;
return 0;
}
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