151 lines
4.8 KiB
C
151 lines
4.8 KiB
C
/****************************************************************************
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* boards/arm/rp2040/common/src/rp2040_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include <arch/board/board.h>
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#include "arm_internal.h"
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#include "chip.h"
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#include "rp2040_gpio.h"
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#include "hardware/rp2040_spi.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rp2040_spi0/1select and rp2040_spi0/1status
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*
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* Description:
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* The external functions, rp2040_spi0/1select and rp2040_spi0/1status
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* must be provided by board-specific logic.
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* They are implementations of the select and status methods of the SPI
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* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
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* All other methods (including rp2040_spibus_initialize()) are provided by
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* common RP2040 logic. To use this common SPI logic on your board:
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*
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* 1. Provide logic in rp2040_boardinitialize() to configure SPI chip
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* select pins.
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* 2. Provide rp2040_spi0/1select() and rp2040_spi0/1status()
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* functions in your board-specific logic.
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* These functions will perform chip selection and status operations
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* using GPIOs in the way your board is configured.
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* 3. Add a calls to rp2040_spibus_initialize() in your low level
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* application initialization logic
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* 4. The handle returned by rp2040_spibus_initialize() may then be used to
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* bind the SPI driver to higher level logic (e.g., calling
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* mmcsd_spislotinitialize(), for example, will bind the SPI driver to
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* the SPI MMC/SD driver).
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*
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****************************************************************************/
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#ifdef CONFIG_RP2040_SPI0
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void rp2040_spi0select(struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n", (int)devid,
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selected ? "assert" : "de-assert");
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rp2040_gpio_put(CONFIG_RP2040_SPI0_CS_GPIO, !selected);
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}
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uint8_t rp2040_spi0status(struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t ret = 0;
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# if defined(CONFIG_RP2040_SPISD) && (CONFIG_RP2040_SPISD_SPI_CH == 0)
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ret = board_spisd_status(dev, devid);
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# endif
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return ret;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int rp2040_spi0cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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#ifdef CONFIG_LCD_ST7789
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if (devid == SPIDEV_DISPLAY(0))
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{
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/* This is the Data/Command control pad which determines whether the
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* data bits are data or a command.
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*/
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rp2040_gpio_put(CONFIG_RP2040_SPI0_RX_GPIO, !cmd);
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return OK;
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}
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#endif
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return -ENODEV;
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}
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#endif
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#endif
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#ifdef CONFIG_RP2040_SPI1
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void rp2040_spi1select(struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n", (int)devid,
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selected ? "assert" : "de-assert");
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rp2040_gpio_put(CONFIG_RP2040_SPI1_CS_GPIO, !selected);
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}
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uint8_t rp2040_spi1status(struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t ret = 0;
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# if defined(CONFIG_RP2040_SPISD) && (CONFIG_RP2040_SPISD_SPI_CH == 1)
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ret = board_spisd_status(dev, devid);
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# endif
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return ret;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int rp2040_spi1cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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#if defined (CONFIG_LCD_ST7789) || defined (CONFIG_LCD_ST7735) || defined (CONFIG_LCD_GC9A01)
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if (devid == SPIDEV_DISPLAY(0))
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{
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/* This is the Data/Command control pad which determines whether the
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* data bits are data or a command.
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*/
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rp2040_gpio_put(CONFIG_RP2040_SPI1_RX_GPIO, !cmd);
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return OK;
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}
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#endif
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return -ENODEV;
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}
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#endif
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#endif
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