| /* 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 "adc_chip.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\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 int 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 */ |