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Diffstat (limited to 'nuttx/configs/mirtoo/src/up_spi2.c')
| -rw-r--r-- | nuttx/configs/mirtoo/src/up_spi2.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/nuttx/configs/mirtoo/src/up_spi2.c b/nuttx/configs/mirtoo/src/up_spi2.c new file mode 100644 index 000000000..785eadb80 --- /dev/null +++ b/nuttx/configs/mirtoo/src/up_spi2.c @@ -0,0 +1,200 @@ +/************************************************************************************ + * configs/mirtoo/src/up_spi2.c + * arch/arm/src/board/up_spi2.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> +#include <stdbool.h> +#include <debug.h> + +#include <nuttx/spi.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "chip.h" +#include "pic32mx-internal.h" +#include "pic32mx-pps.h" +#include "mirtoo_internal.h" + +#ifdef CONFIG_PIC32MX_SPI2 + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/* The Mirtoo module as two on-board SPI devices: + * + * SST25VF032B - 32-Mbit SPI Serial FLASH + * + * PGA117 - Zero drift programmable gain amplifier with MUX. The PGA117 offers 10 + * analog inputs, a four-pin SPI interface with daisy-chain capability, and hardware + * and software shutdown in a TSSOP-20 package. Only 8 of the analog inputs (PORT0-7) + * are used on the Mirtoo module. + * + * Chip selects: + * + * ------ -------- ------------------------- -------------------------------- + * PIN SIGNAL BOARD CONNECTION NOTES + * ------ -------- ------------------------- -------------------------------- + * RPA1 SI PGA117 and SST25VF032B SPI2 data OUT (SDO2) + * RPA2 SO PGA117 and SST25VF032B SPI2 data IN (SDI2) + * SCK2 SCK PGA117 and SST25VF032B SPI2 clock + * + * RB7 ~CSAI PGA117 PGA117 chip select (active low) + * RB13 ~CSM SST25VF032B SST25VF032B chip select (active low) + */ + +#define GPIO_SI (GPIO_OUTPUT|GPIO_PORTA|GPIO_PIN1) +#define GPIO_SO (GPIO_INPUT|GPIO_PORTA|GPIO_PIN1) +#define GPIO_SCK (GPIO_OUTPUT|GPIO_PORTA|GPIO_PIN1) + +#define GPIO_PGA117_CS (GPIO_OUTPUT|GPIO_VALUE_ONE|GPIO_PORTB|GPIO_PIN7) +#define GPIO_SST25VF032B_CS (GPIO_OUTPUT|GPIO_VALUE_ONE|GPIO_PORTB|GPIO_PIN13) + +/* The following enable debug output from this file (needs CONFIG_DEBUG too). + * + * CONFIG_DEBUG_SPI - Define to enable basic SPI debug + */ + +#ifdef CONFIG_DEBUG_SPI +# define spidbg lldbg +# define spivdbg llvdbg +#else +# define spidbg(x...) +# define spivdbg(x...) +#endif + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: pic32mx_spi2initialize + * + * Description: + * Called to configure SPI2 chip select GPIO pins for the Mirtoo module. + * + ************************************************************************************/ + +void weak_function pic32mx_spi2initialize(void) +{ + uint32_t regval; + + /* Make sure that TRIS pins are set correctly. Configure the SPI pins as digital + * inputs and outputs first. + */ + + pic32mx_configgpio(GPIO_SI); + pic32mx_configgpio(GPIO_SO); + pic32mx_configgpio(GPIO_SCK); + + /* Configure SPI2 data in and data out to use RPA2 and 1, respectively */ + + putreg32(PPS_INSEL_RPA2, PIC32MX_PPS_SDI2R); + putreg32(PPS_OUTSEL_SDO2, PIC32MX_PPS_RPA1R); + + /* Configure the SPI chip select GPIOs */ + + pic32mx_configgpio(GPIO_PGA117_CS); + pic32mx_configgpio(GPIO_SST25VF032B_CS); +} + +/************************************************************************************ + * Name: pic32mx_spi2select, pic32mx_spi2status, and pic32mx_spi2cmddata + * + * Description: + * These external functions must be provided by board-specific logic. They are + * implementations of the select, status, and cmddata methods of the SPI interface + * defined by struct spi_ops_s (see include/nuttx/spi.h). All other methods + * including up_spiinitialize()) are provided by common PIC32MX logic. To use + * this common SPI logic on your board: + * + * 1. Provide logic in pic32mx_boardinitialize() to configure SPI chip select + * pins. + * 2. Provide pic32mx_spiNselect() and pic32mx_spiNstatus() functions + * in your board-specific logic. These functions will perform chip selection + * and status operations using GPIOs in the way your board is configured. + * 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide + * pic32mx_spiNcmddata() functions in your board-specific logic. These + * functions will perform cmd/data selection operations using GPIOs in the way + * your board is configured. + * 3. Add a call to up_spiinitialize() in your low level application + * initialization logic + * 4. The handle returned by up_spiinitialize() may then be used to bind the + * SPI driver to higher level logic (e.g., calling + * mmcsd_spislotinitialize(), for example, will bind the SPI driver to + * the SPI MMC/SD driver). + * + ************************************************************************************/ + +struct spi_dev_s; +enum spi_dev_e; + +void pic31mx_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected) +{ + spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); + + if (devid == SPIDEV_FLASH) + { + pic32mx_gpiowrite(GPIO_SST25VF032B_CS, !selected); + } + else if (devid == SPIDEV_MUX) + { + pic32mx_gpiowrite(GPIO_PGA117_CS, !selected); + } +} + +uint8_t pic31mx_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid) +{ + return 0; +} + +#ifdef CONFIG_SPI_CMDDATA +int pic31mx_spi2cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd) +{ + return 0; +} +#endif + +#endif /* CONFIG_PIC32MX_SPI2 */ |