examples/platform/silabs/efr32/spi_multiplex.h

/*
 *
 *    Copyright (c) 2022 Project CHIP Authors
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

/*
 * This file contains all the functions specific to the MG24 family for
 * multiplexing the SPI port with WiFi NCP and other WSTK
 * devices such as External Flash and LCD.
 * That can be extended to other families as well.
 */

#pragma once

#ifndef SL_LCDCTRL_MUX
#define SL_LCDCTRL_MUX (EFR32MG24 && SL_WIFI && DISPLAY_ENABLED)
#endif // SL_LCDCTRL_MUX

#ifndef SL_UARTCTRL_MUX
#define SL_UARTCTRL_MUX (EFR32MG24 && WF200_WIFI && ENABLE_CHIP_SHELL)
#endif // SL_UARTCTRL_MUX

#ifndef SL_MX25CTRL_MUX
#define SL_MX25CTRL_MUX (EFR32MG24 && SL_WIFI && CONFIG_USE_EXTERNAL_FLASH)
#endif // SL_MX25CTRL_MUX

#ifndef SL_BTLCTRL_MUX
#define SL_BTLCTRL_MUX (EFR32MG24 && SL_WIFI && CONFIG_USE_EXTERNAL_FLASH)
#endif // SL_BTLCTRL_MUX

#ifndef SL_SPICTRL_MUX
#define SL_SPICTRL_MUX (EFR32MG24 && SL_WIFI && (SL_LCDCTRL_MUX || SL_UARTCTRL_MUX || SL_MX25CTRL_MUX || SL_BTLCTRL_MUX))
#endif // SL_SPICTRL_MUX

#if SL_SPICTRL_MUX
#ifdef __cplusplus
extern "C" {
#endif

#if SL_SPICTRL_MUX
/****************************************************************************
 * @fn  void SPIDRV_SetBaudrate()
 * @brief
 *     Sets the SPI driver to required baudrate
 * @param[in] None
 * @return returns void
 *****************************************************************************/
void SPIDRV_SetBaudrate(uint32_t);

#if defined(RS911X_WIFI)
/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_spi_cs_assert()
 * @brief
 *     Assert chip select.
 * @param[in] None
 * @return returns SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_spi_cs_assert(void);

/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_spi_cs_deassert()
 * @brief
 *     De-Assert chip select.
 * @param[in] None
 * @return returns SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_spi_cs_deassert(void);
#endif /* RS911X_WIFI */
#endif // SL_SPICTRL_MUX

#if SL_MUX25CTRL_MUX
/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_spiflash_cs_assert()
 * @brief
 *     Assert SPI flash chip select.
 * @param[in] None
 * @return returns SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_spiflash_cs_assert(void);

/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_spiflash_cs_deassert()
 * @brief
 *     De-Assert SPI flash chip select.
 * @param[in] None
 * @return returns SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_spiflash_cs_deassert(void);
#endif // SL_MUX25CTRL_MUX

#if SL_BTLCTRL_MUX
/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_pre_bootloader_spi_transfer()
 * @brief
 *     Take a semaphore and controlling CS pin for EXP header and SPI flash
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_pre_bootloader_spi_transfer(void);

/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_post_bootloader_spi_transfer()
 * @brief
 *     De-Assert EXT SPI flash CS pin and release semaphore
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_post_bootloader_spi_transfer(void);
#endif // SL_BTLCTRL_MUX

#if SL_LCDCTRL_MUX
/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_pre_lcd_spi_transfer()
 * @brief
 *     Take a semaphore and setting LCD baudrate
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_pre_lcd_spi_transfer(void);

/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_post_lcd_spi_transfer()
 * @brief
 *     Release semaphore
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_post_lcd_spi_transfer(void);
#endif // SL_LCDCTRL_MUX

#if SL_UARTCTRL_MUX
/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_pre_uart_transfer()
 * @brief
 *     Take a semaphore and setting GPIO, disable IRQ
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_pre_uart_transfer(void);

/****************************************************************************
 * @fn  sl_status_t sl_wfx_host_post_uart_transfer()
 * @brief
 *     Reset GPIO, enabled IRQ, release semaphore
 * @param[in] None
 * @return SL_STATUS_OK
 *****************************************************************************/
sl_status_t sl_wfx_host_post_uart_transfer(void);
#endif // SL_UARTCTRL_MUX

#ifdef __cplusplus
}
#endif
#endif // SL_SPICTRL_MUX