mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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c1e02ca220
Almost done. Comment changes only. BUG=chrome-os-partner:18343 BRANCH=none TEST=build all platforms Change-Id: I974dfc12aa264e2035b3bae35a089c19344e7d45 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/175484 Reviewed-by: Bill Richardson <wfrichar@chromium.org>
122 lines
2.8 KiB
C
122 lines
2.8 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 <fcntl.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 <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "cros_ec_dev.h"
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#include "comm-host.h"
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#include "ec_commands.h"
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static int fd = -1;
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static int ec_command_dev(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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{
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struct cros_ec_command s_cmd;
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int r;
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s_cmd.command = command;
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s_cmd.version = version;
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s_cmd.result = 0xff;
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s_cmd.outsize = outsize;
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s_cmd.outdata = (uint8_t *)outdata;
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s_cmd.insize = insize;
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s_cmd.indata = indata;
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r = ioctl(fd, CROS_EC_DEV_IOCXCMD, &s_cmd);
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if (r < 0) {
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fprintf(stderr, "ioctl %d, errno %d (%s), EC result %d\n",
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r, errno, strerror(errno), s_cmd.result);
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if (errno == EAGAIN && s_cmd.result == EC_RES_IN_PROGRESS) {
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s_cmd.command = EC_CMD_RESEND_RESPONSE;
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r = ioctl(fd, CROS_EC_DEV_IOCXCMD, &s_cmd);
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fprintf(stderr,
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"ioctl %d, errno %d (%s), EC result %d\n",
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r, errno, strerror(errno), s_cmd.result);
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}
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} else if (s_cmd.result != EC_RES_SUCCESS) {
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fprintf(stderr, "EC result %d\n", s_cmd.result);
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return -EECRESULT - s_cmd.result;
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}
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return r;
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}
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static int ec_readmem_dev(int offset, int bytes, void *dest)
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{
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struct cros_ec_readmem s_mem;
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struct ec_params_read_memmap r_mem;
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int r;
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static int fake_it;
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if (!fake_it) {
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s_mem.offset = offset;
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s_mem.bytes = bytes;
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s_mem.buffer = dest;
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r = ioctl(fd, CROS_EC_DEV_IOCRDMEM, &s_mem);
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if (r < 0 && errno == ENOTTY)
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fake_it = 1;
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else
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return r;
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}
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r_mem.offset = offset;
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r_mem.size = bytes;
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return ec_command_dev(EC_CMD_READ_MEMMAP, 0,
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&r_mem, sizeof(r_mem),
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dest, bytes);
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}
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int comm_init_dev(void)
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{
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char version[80];
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int r;
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char *s;
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fd = open("/dev/" CROS_EC_DEV_NAME, O_RDWR);
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if (fd < 0)
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return 1;
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r = read(fd, version, sizeof(version)-1);
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if (r <= 0) {
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close(fd);
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return 2;
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}
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version[r] = '\0';
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s = strchr(version, '\n');
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if (s)
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*s = '\0';
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if (strcmp(version, CROS_EC_DEV_VERSION)) {
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close(fd);
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return 3;
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}
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ec_command = ec_command_dev;
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if (ec_readmem_dev(EC_MEMMAP_ID, 2, version) == 2 &&
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version[0] == 'E' && version[1] == 'C')
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ec_readmem = ec_readmem_dev;
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/*
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* TODO(crosbug.com/p/23823): Need a way to get this from the driver
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* and EC. For now, pick a magic lowest common denominator value. The
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* ec_max_outsize is set to handle v3 EC protocol. The ec_max_insize
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* needs to be set to the largest value that can be returned from the
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* EC, EC_PROTO2_MAX_PARAM_SIZE.
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*/
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ec_max_outsize = EC_PROTO2_MAX_PARAM_SIZE - 8;
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ec_max_insize = EC_PROTO2_MAX_PARAM_SIZE;
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return 0;
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}
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