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esp32[s2|s3]: Add SPI bitbang support

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This commit is contained in:
Eren Terzioglu
2024-10-10 15:44:35 +03:00
committed by Xiang Xiao
parent 243a2adcaf
commit 3f77e97b03
11 changed files with 912 additions and 50 deletions
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boards/xtensa/esp32/common/src/esp32_board_spidev.c
+147 -17
View File
@@ -30,7 +30,105 @@
#include <nuttx/spi/spi_transfer.h>
#ifdef CONFIG_ESPRESSIF_SPI_PERIPH
#include "esp32_spi.h"
#endif
#ifdef CONFIG_ESPRESSIF_SPI_BITBANG
#include "espressif/esp_spi_bitbang.h"
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: spi_bitbang_driver_init
*
* Description:
* Initialize SPI bitbang driver and register the /dev/spi device.
*
* Input Parameters:
* port - The SPI bus number, used to build the device path as /dev/spiN
*
* Returned Value:
* Zero (OK) is returned on success; A negated errno value is returned
* to indicate the nature of any failure.
*
****************************************************************************/
#ifdef CONFIG_ESPRESSIF_SPI_BITBANG
static int spi_bitbang_driver_init(int port)
{
int ret;
struct spi_dev_s *spi;
syslog(LOG_INFO, "Initializing /dev/spi%d...\n", port);
/* Initialize SPI device */
spi = esp_spi_bitbang_init();
if (spi == NULL)
{
syslog(LOG_ERR, "Failed to initialize SPI%d.\n", port);
return -ENODEV;
}
ret = spi_register(spi, port);
if (ret < 0)
{
syslog(LOG_ERR, "Failed to register /dev/spi%d: %d\n", port, ret);
esp_spi_bitbang_uninitialize(spi);
}
return ret;
}
#endif
/****************************************************************************
* Name: spi_driver_init
*
* Description:
* Initialize SPI driver and register the /dev/spi device.
*
* Input Parameters:
* port - The SPI bus number, used to build the device path as /dev/spiN
*
* Returned Value:
* Zero (OK) is returned on success; A negated errno value is returned
* to indicate the nature of any failure.
*
****************************************************************************/
#ifdef CONFIG_ESPRESSIF_SPI_PERIPH
static int spi_driver_init(int port)
{
int ret = OK;
struct spi_dev_s *spi;
syslog(LOG_INFO, "Initializing /dev/spi%d...\n", port);
/* Initialize SPI device */
spi = esp32_spibus_initialize(port);
if (spi == NULL)
{
syslog(LOG_ERR, "Failed to initialize SPI%d.\n", port);
return -ENODEV;
}
ret = spi_register(spi, port);
if (ret < 0)
{
syslog(LOG_ERR, "Failed to register /dev/spi%d: %d\n", port, ret);
esp32_spibus_uninitialize(spi);
}
return ret;
}
#endif
/****************************************************************************
* Public Functions
@@ -40,32 +138,64 @@
* Name: board_spidev_initialize
*
* Description:
* Initialize and register SPI driver for the specified SPI port.
* Initialize SPI driver and register the /dev/spi device.
*
* Input Parameters:
* port - The SPI bus number, used to build the device path as /dev/spiN
*
* Returned Value:
* Zero (OK) is returned on success; A negated errno value is returned
* to indicate the nature of any failure.
*
****************************************************************************/
int board_spidev_initialize(int port)
{
int ret;
struct spi_dev_s *spi;
int ret = OK;
spiinfo("Initializing /dev/spi%d...\n", port);
/* Initialize SPI device */
spi = esp32_spibus_initialize(port);
if (spi == NULL)
switch (port)
{
spierr("Failed to initialize SPI%d.\n", port);
return -ENODEV;
}
#ifdef CONFIG_ESP32_SPI2
case ESP32_SPI2:
{
ret = spi_driver_init(ESP32_SPI2);
if (ret != OK)
{
return ret;
}
break;
}
#endif
ret = spi_register(spi, port);
if (ret < 0)
{
spierr("Failed to register /dev/spi%d: %d\n", port, ret);
#ifdef CONFIG_ESP32_SPI3
case ESP32_SPI3:
{
ret = spi_driver_init(ESP32_SPI3);
if (ret != OK)
{
return ret;
}
break;
}
#endif
esp32_spibus_uninitialize(spi);
#ifdef CONFIG_ESPRESSIF_SPI_BITBANG
case ESPRESSIF_SPI_BITBANG:
{
ret = spi_bitbang_driver_init(ESPRESSIF_SPI_BITBANG);
if (ret != OK)
{
return ret;
}
break;
}
#endif
default:
{
wderr("ERROR: unsupported SPI %d\n", port);
return ERROR;
}
}
return ret;