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/* Copyright 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.
*/
/* ADC module for Chrome EC */
#include "adc.h"
#include "common.h"
#include "console.h"
#include "ec_commands.h"
#include "host_command.h"
#include "util.h"
/* 'adc' console command is not supported in continuous mode */
#ifndef CONFIG_ADC_PROFILE_FAST_CONTINUOUS
static enum adc_channel find_adc_channel_by_name(const char *name)
{
const struct adc_t *ch = adc_channels;
int i;
if (!name || !*name)
return ADC_CH_COUNT;
for (i = 0; i < ADC_CH_COUNT; i++, ch++) {
if (!strcasecmp(name, ch->name))
return i;
}
return ADC_CH_COUNT;
}
static int print_one_adc(int channel)
{
int v;
v = adc_read_channel(channel);
if (v == ADC_READ_ERROR)
return EC_ERROR_UNKNOWN;
ccprintf(" %s = %d mV\n", adc_channels[channel].name, v);
return EC_SUCCESS;
}
static int command_adc(int argc, char **argv)
{
int i, ret;
/* If a channel is specified, read only that one */
if (argc == 2) {
i = find_adc_channel_by_name(argv[1]);
if (i == ADC_CH_COUNT)
return EC_ERROR_PARAM1;
return print_one_adc(i);
} else {
/* Otherwise print them all */
for (i = 0; i < ADC_CH_COUNT; ++i) {
ret = print_one_adc(i);
if (ret)
return ret;
}
return EC_SUCCESS;
}
}
DECLARE_CONSOLE_COMMAND(adc, command_adc,
"[name]",
"Print ADC channel(s)");
static enum ec_status hc_adc_read(struct host_cmd_handler_args *args)
{
const struct ec_params_adc_read *params = args->params;
struct ec_response_adc_read *resp = args->response;
enum adc_channel ch = (enum adc_channel)params->adc_channel;
int32_t adc_value;
if (ch >= ADC_CH_COUNT)
return EC_RES_INVALID_PARAM;
adc_value = adc_read_channel(ch);
if (adc_value == ADC_READ_ERROR)
return EC_RES_ERROR;
resp->adc_value = adc_value;
args->response_size = sizeof(*resp);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_ADC_READ, hc_adc_read, EC_VER_MASK(0));
#endif /* CONFIG_ADC_PROFILE_FAST_CONTINUOUS */
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