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drivers: spi: esp32c3: add DMA support

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Add SPI DMA support for esp32c3.

Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>
This commit is contained in:
Lucas Tamborrino 2022-09-15 11:06:32 -03:00 committed by Carles Cufí
parent af47b9b34b
commit a29ebef6ce
3 changed files with 24 additions and 2 deletions
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18
drivers/spi/spi_esp32_spim.c
View file

@ -19,6 +19,8 @@ LOG_MODULE_REGISTER(esp32_spi, CONFIG_SPI_LOG_LEVEL);
#ifndef CONFIG_SOC_ESP32C3
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#else
#include <hal/gdma_hal.h>
#include <hal/gdma_ll.h>
#include <zephyr/drivers/interrupt_controller/intc_esp32c3.h>
#endif
#include <zephyr/drivers/clock_control.h>
@ -150,6 +152,7 @@ static int spi_esp32_init_dma(const struct device *dev)
{
const struct spi_esp32_config *cfg = dev->config;
struct spi_esp32_data *data = dev->data;
uint8_t channel_offset;
LOG_ERR("DMA");
if (clock_control_on(cfg->clock_dev, (clock_control_subsys_t)cfg->dma_clk_src)) {
@ -157,6 +160,17 @@ static int spi_esp32_init_dma(const struct device *dev)
return -EIO;
}
#ifdef CONFIG_SOC_ESP32C3
gdma_hal_init(&data->hal_gdma, 0);
gdma_ll_enable_clock(data->hal_gdma.dev, true);
gdma_ll_tx_reset_channel(data->hal_gdma.dev, cfg->dma_host);
gdma_ll_rx_reset_channel(data->hal_gdma.dev, cfg->dma_host);
gdma_ll_tx_connect_to_periph(data->hal_gdma.dev, cfg->dma_host, 0);
gdma_ll_rx_connect_to_periph(data->hal_gdma.dev, cfg->dma_host, 0);
channel_offset = 0;
#else
channel_offset = 1;
#endif /* CONFIG_SOC_ESP32C3 */
#ifdef CONFIG_SOC_ESP32
/*Connect SPI and DMA*/
DPORT_SET_PERI_REG_BITS(DPORT_SPI_DMA_CHAN_SEL_REG, 3, cfg->dma_host + 1,
@ -166,8 +180,8 @@ static int spi_esp32_init_dma(const struct device *dev)
data->hal_config.dma_in = (spi_dma_dev_t *)cfg->spi;
data->hal_config.dma_out = (spi_dma_dev_t *)cfg->spi;
data->hal_config.dma_enabled = true;
data->hal_config.tx_dma_chan = cfg->dma_host + 1;
data->hal_config.rx_dma_chan = cfg->dma_host + 1;
data->hal_config.tx_dma_chan = cfg->dma_host + channel_offset;
data->hal_config.rx_dma_chan = cfg->dma_host + channel_offset;
data->hal_config.dmadesc_n = 1;
data->hal_config.dmadesc_rx = &data->dma_desc_rx;
data->hal_config.dmadesc_tx = &data->dma_desc_tx;

6
drivers/spi/spi_esp32_spim.h
View file

@ -9,6 +9,9 @@
#include <zephyr/drivers/pinctrl.h>
#include <hal/spi_hal.h>
#ifdef CONFIG_SOC_ESP32C3
#include <hal/gdma_hal.h>
#endif
#define SPI_MASTER_FREQ_8M (APB_CLK_FREQ/10)
#define SPI_MASTER_FREQ_9M (APB_CLK_FREQ/9) /* 8.89MHz */
@ -39,6 +42,9 @@ struct spi_esp32_data {
struct spi_context ctx;
spi_hal_context_t hal;
spi_hal_config_t hal_config;
#ifdef CONFIG_SOC_ESP32C3
gdma_hal_context_t hal_gdma;
#endif
spi_hal_timing_conf_t timing_config;
spi_hal_dev_config_t dev_config;
spi_hal_trans_config_t trans_config;

2
dts/riscv/espressif/esp32c3.dtsi
View file

@ -189,6 +189,8 @@
interrupts = <SPI2_INTR_SOURCE>;
interrupt-parent = <&intc>;
clocks = <&rtc ESP32_SPI2_MODULE>;
dma-clk = <ESP32_GDMA_MODULE>;
dma-host = <1>;
status = "disabled";
};