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