73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* adc-ti-adc108s102.h - Private */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ADC108S102_PRIV_H__
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#define __ADC108S102_PRIV_H__
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#include <spi.h>
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#include <adc.h>
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#include <misc/byteorder.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Internal return code */
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#define ADC108S102_DONE (-1)
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/* 8 chans maximum + 1 dummy, 16 bits per-chans -> 18 bytes */
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#define ADC108S102_CMD_BUFFER_SIZE 9
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/* 1 dummy + 8 results maximum, 16 bits per-chans -> 18 bytes */
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#define ADC108S102_SAMPLING_BUFFER_SIZE 9
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#define ADC108S102_CHANNELS 8
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#define ADC108S102_CHANNELS_SIZE \
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(ADC108S102_CHANNELS * sizeof(uint32_t))
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#define ADC108S102_CHANNEL_CMD(_channel_) \
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sys_cpu_to_be16((_channel_ << 8) << 3)
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#define ADC108S102_RESULT_MASK 0xfff /* 12 bits resolution */
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#define ADC108S102_RESULT(_res_) \
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(sys_be16_to_cpu(_res_) & ADC108S102_RESULT_MASK)
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struct ti_adc108s102_config {
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const char *spi_port;
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uint32_t spi_config_flags;
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uint32_t spi_freq;
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uint32_t spi_slave;
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};
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struct ti_adc108s102_chan {
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uint32_t buf_idx;
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};
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struct ti_adc108s102_data {
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uint16_t cmd_buffer[ADC108S102_CMD_BUFFER_SIZE];
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uint16_t sampling_buffer[ADC108S102_SAMPLING_BUFFER_SIZE];
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struct device *spi;
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struct ti_adc108s102_chan chans[ADC108S102_CHANNELS];
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struct adc_seq_table *seq_table;
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uint8_t cmd_buf_len;
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uint8_t sampling_buf_len;
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uint8_t stride[2];
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ADC108S102_PRIV_H__ */
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