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driver: adc16 dma support async and repeat sample

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add support for async call and repeat sample test

1. change the DMA req to 2 byte each
2. increase the buffer pre-dma
3. add protection on invalid buffer

depends on: PR #56104
fixing: issue #56070

Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
This commit is contained in:
Hake Huang 2023-03-22 23:21:13 +08:00 • committed by Carles Cufí
commit e01586a03a
1 changed files with 19 additions and 8 deletions
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27
drivers/adc/adc_mcux_adc16.c
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@ -82,6 +82,7 @@ static void adc_dma_callback(const struct device *dma_dev, void *callback_arg,
struct mcux_adc16_data *data = dev->data;
LOG_DBG("DMA done");
data->buffer++;
adc_context_on_sampling_done(&data->ctx, dev);
}
#endif
@ -196,6 +197,19 @@ static int start_read(const struct device *dev,
}
ADC16_SetHardwareAverage(config->base, mode);
if (sequence->buffer_size < 2) {
LOG_ERR("sequence buffer size too small %d < 2", sequence->buffer_size);
return -EINVAL;
}
if (sequence->options) {
if (sequence->buffer_size <
2 * (sequence->options->extra_samplings + 1)) {
LOG_ERR("sequence buffer size too small < 2 * extra + 2");
return -EINVAL;
}
}
data->buffer = sequence->buffer;
adc_context_start_read(&data->ctx, sequence);
@ -271,8 +285,7 @@ static void adc_context_start_sampling(struct adc_context *ctx)
#ifdef CONFIG_ADC_MCUX_ADC16_ENABLE_EDMA
LOG_DBG("config dma");
data->buffer = ctx->sequence.buffer;
data->adc_dma_config.dma_block.block_size = ctx->sequence.buffer_size;
data->adc_dma_config.dma_block.block_size = 2;
data->adc_dma_config.dma_block.dest_address = (uint32_t)data->buffer;
data->adc_dma_config.dma_cfg.head_block =
&(data->adc_dma_config.dma_block);
@ -380,21 +393,19 @@ static int mcux_adc16_init(const struct device *dev)
#ifdef CONFIG_ADC_MCUX_ADC16_ENABLE_EDMA
/* Enable DMA. */
ADC16_EnableDMA(base, true);
data->adc_dma_config.dma_cfg.block_count = 1U;
data->adc_dma_config.dma_cfg.dma_slot = config->dma_slot;
data->adc_dma_config.dma_cfg.channel_direction = PERIPHERAL_TO_MEMORY;
data->adc_dma_config.dma_cfg.source_burst_length = 4U;
data->adc_dma_config.dma_cfg.dest_burst_length = 4U;
data->adc_dma_config.dma_cfg.source_burst_length = 2U;
data->adc_dma_config.dma_cfg.dest_burst_length = 2U;
data->adc_dma_config.dma_cfg.channel_priority = 0U;
data->adc_dma_config.dma_cfg.dma_callback = adc_dma_callback;
data->adc_dma_config.dma_cfg.user_data = (void *)dev;
data->adc_dma_config.dma_cfg.source_data_size = 4U;
data->adc_dma_config.dma_cfg.dest_data_size = 4U;
data->adc_dma_config.dma_cfg.source_data_size = 2U;
data->adc_dma_config.dma_cfg.dest_data_size = 2U;
data->adc_dma_config.dma_block.source_address = (uint32_t)&base->R[0];
if (data->dev_dma == NULL || !device_is_ready(data->dev_dma)) {
LOG_ERR("dma binding fail");
return -EINVAL;