305 lines
8.8 KiB
C
305 lines
8.8 KiB
C
/****************************************************************************
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* boards/mips/pic32mz/chipkit-wifire/src/pic32mz_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 <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 "mips_internal.h"
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#include "pic32mz_gpio.h"
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#include "chipkit-wifire.h"
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#ifdef CONFIG_PIC32MZ_SPI
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pic32mz_spidev_initialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the PIC32MZ board.
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*
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****************************************************************************/
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void weak_function pic32mz_spidev_initialize(void)
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{
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}
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/****************************************************************************
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* Name: pic32mz_spiNselect, pic32mz_spiNstatus, and pic32mz_spiNcmddata
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*
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* Description:
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* These external functions must be provided by board-specific logic.
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* They are implementations of the select, status, and cmddata methods of
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* the SPI interface defined by struct spi_ops_s
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* (see include/nuttx/spi/spi.h).
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* All other methods including pic32mz_spibus_initialize()) are provided by
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* common PIC32MZ logic.
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* To use this common SPI logic on your board:
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*
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* 1. Provide logic in pic32mz_boardinitialize() to configure SPI/SPI chip
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* select pins.
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* 2. Provide pic32mz_spiNselect() and pic32mz_spiNstatus() functions
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* in your board-specific logic. These functions will perform chip
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* selection and status operations using GPIOs in the way your board is
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* configured.
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* 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
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* pic32mz_spiNcmddata() functions in your board-specific logic. These
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* functions will perform cmd/data selection operations using GPIOs in
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* the way your board is configured.
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* 3. Add a call to pic32mz_spibus_initialize() in your low level
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* application initialization logic
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* 4. The handle returned by pic32mz_spibus_initialize() may then be used
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* to 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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struct spi_dev_s;
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#ifdef CONFIG_PIC32MZ_SPI1
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void pic32mz_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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}
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uint8_t pic32mz_spi1status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi1cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI1 */
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#ifdef CONFIG_PIC32MZ_SPI2
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void pic32mz_spi2select(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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}
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uint8_t pic32mz_spi2status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi2cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI2 */
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#ifdef CONFIG_PIC32MZ_SPI3
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void pic32mz_spi3select(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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}
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uint8_t pic32mz_spi3status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi3cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI3 */
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#ifdef CONFIG_PIC32MZ_SPI4
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void pic32mz_spi4select(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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}
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uint8_t pic32mz_spi4status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi4cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI4 */
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#ifdef CONFIG_PIC32MZ_SPI5
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void pic32mz_spi5select(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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}
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uint8_t pic32mz_spi5status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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#warning "Missing logic"
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi5cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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#warning "Missing logic"
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI5 */
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#ifdef CONFIG_PIC32MZ_SPI6
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void pic32mz_spi6select(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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#warning "Missing logic"
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}
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uint8_t pic32mz_spi6status(struct spi_dev_s *dev, uint32_t devid)
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{
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spiinfo("Returning nothing\n");
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#warning "Missing logic"
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return 0;
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}
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#ifdef CONFIG_SPI_CMDDATA
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int pic32mz_spi6cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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#warning "Missing logic"
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return 0;
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}
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#endif
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#endif /* CONFIG_PIC32MZ_SPI6 */
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/****************************************************************************
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* Name: pic32mz_spi1/2/...register
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*
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* Description:
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* If the board supports a card detect callback to inform the SPI-based
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* MMC/SD driver when an SD card is inserted or removed, then
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* CONFIG_SPI_CALLBACK should be defined and the following function(s)
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* must be implemented. These functions implements the registercallback
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* method of the SPI interface (see include/nuttx/spi/spi.h for details)
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*
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* Input Parameters:
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* dev - Device-specific state data
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* callback - The function to call on the media change
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* arg - A caller provided value to return with the callback
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*
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* Returned Value:
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* 0 on success; negated errno on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_SPI_CALLBACK
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#ifdef CONFIG_PIC32MZ_SPI1
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int pic32mz_spi1register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI1 */
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#ifdef CONFIG_PIC32MZ_SPI2
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int pic32mz_spi2register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI2 */
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#ifdef CONFIG_PIC32MZ_SPI3
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int pic32mz_spi3register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI3 */
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#ifdef CONFIG_PIC32MZ_SPI4
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int pic32mz_spi4register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI4 */
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#ifdef CONFIG_PIC32MZ_SPI5
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int pic32mz_spi5register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI5 */
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#ifdef CONFIG_PIC32MZ_SPI6
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int pic32mz_spi6register(struct spi_dev_s *dev,
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spi_mediachange_t callback, void *arg)
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{
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#warning Missing logic
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return -ENOSYS;
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}
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#endif /* CONFIG_PIC32MZ_SPI6 */
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#endif /* CONFIG_SPI_CALLBACK */
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#endif /* CONFIG_PIC32MZ_SPI */
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