2.3-InternetRadio/nutos/nut/arch/cm3/dev/stm/stm32_spi6.c

/*
 * Copyright (C) 2010 by Ulrich Prinz (uprinz2@netscape.net)
 * Copyright (C) 2010 by Nikolaj Zamotaev. All rights reserved.
 * Copyright (C) 2014 by Uwe Bonnes.
 *
 * 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 of the copyright holders nor the names of
 *    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.
 *
 * For additional information see http://www.ethernut.de/
 *
 */

/*
 * \verbatim
 * $Id: stm32_spi6.c 5716 2014-05-23 14:55:45Z u_bonnes $
 * \endverbatim
 */

#include <arch/cm3.h>
#include <sys/timer.h>
#include <cfg/spi.h>
#include <cfg/arch/gpio.h>
#include <dev/spibus.h>
#include <dev/gpio.h>

#include <arch/cm3/stm/stm32_gpio.h>
#include <arch/cm3/stm/stm32_spi.h>
#include <dev/irqreg.h>
#include <sys/event.h>
#include <sys/nutdebug.h>

#include <stdlib.h>
#include <errno.h>

/* Handle the PIN remap possibilities
 * F4
 *        NSS:  PG8
 *        SCK:  PG13
 *        MISO: PG12
 *        MOSI: PG14
 *
 * For function pins, we use PG8/12/13/14 as default
 */

#if !defined( SPIBUS6_NO_CS)
#if !defined(SPIBUS6_CS0_PORT) && !defined(SPIBUS6_CS0_PIN)
#define SPIBUS_CS0_PORT NUTGPIO_PORTG
#define SPIBUS_CS0_PIN  8
#elif !defined(SPIBUS6_CS0_PORT) || !defined(SPIBUS6_CS0_PIN)
#warning "SPIBUS6 uncomplete chip select"
#else
#define SPIBUS_CS0_PORT SPIBUS6_CS0_PORT
#define SPIBUS_CS0_PIN  SPIBUS6_CS0_PIN
#endif

#if defined(SPIBUS6_CS1_PORT)
#define SPIBUS_CS1_PORT SPIBUS6_CS1_PORT
#endif
#if defined(SPIBUS6_CS2_PORT)
#define SPIBUS_CS2_PORT SPIBUS6_CS2_PORT
#endif
#if defined(SPIBUS6_CS3_PORT)
#define SPIBUS_CS3_PORT SPIBUS6_CS3_PORT
#endif
#if defined(SPIBUS6_CS1_PIN)
#define SPIBUS_CS1_PIN  SPIBUS6_CS1_PIN
#endif
#if defined(SPIBUS6_CS2_PIN)
#define SPIBUS_CS2_PIN  SPIBUS6_CS2_PIN
#endif
#if defined(PIBUS6_CS2_PIN)
#define SPIBUS_CS3_PIN  SPIBUS6_CS3_PIN
#endif

#endif

#define SPIBUS_SCK_PORT  NUTGPIO_PORTG
#define SPIBUS_SCK_PIN 13
#define SPIBUS_MISO_PORT NUTGPIO_PORTG
#define SPIBUS_MISO_PIN 12
#define SPIBUS_MOSI_PORT NUTGPIO_PORTG
#define SPIBUS_MOSI_PIN 14

#define SPI_GPIO_AF GPIO_AF_SPI6
#define SPI_ENABLE_CLK_SET() CM3BBSET(RCC_BASE, RCC_TypeDef, APB2ENR, _BI32(RCC_APB2ENR_SPI6EN))
#define SPI_ENABLE_CLK_GET() CM3BBGET(RCC_BASE, RCC_TypeDef, APB2ENR, _BI32(RCC_APB2ENR_SPI6EN))
#define sig_SPI             sig_SPI6
#define SPI_BASE            SPI6_BASE

#if !defined(SPIBUS6_MODE)
#define SPIBUS_MODE IRQ_MODE
#else
#define SPIBUS_MODE SPIBUS6_MODE
#endif

#if SPIBUS_MODE == DMA_MODE
 #define SPI_DMA_TX_CHANNEL SPI6_TX_DMA
 #define sig_SPI_DMA_TX     SPI6_TX_DMA_IRQ
 #define SPI_DMA_RX_CHANNEL SPI6_RX_DMA
 #define sig_SPI_DMA_RX     SPI6_RX_DMA_IRQ
#endif

NUTSPIBUS spiBus6Stm32 = {
    NULL,                       /*!< Bus mutex semaphore (bus_mutex). */
    NULL,                       /*!< Bus ready signal (bus_ready). */
    SPI6_BASE,                  /*!< Bus base address (bus_base). */
    NULL,                       /*!< Bus interrupt handler (bus_sig). */
    Stm32SpiBusNodeInit,         /*!< Initialize the bus (bus_initnode). */
    Stm32SpiBusSelect,          /*!< Select the specified device (bus_alloc). */
    Stm32SpiBusDeselect,        /*!< Deselect the specified device (bus_release). */
    Stm32SpiBusTransfer,
    NutSpiBusWait,
    NutSpiBusSetMode,           /*!< Set SPI mode of a specified device (bus_set_mode). */
    NutSpiBusSetRate,           /*!< Set clock rate of a specified device (bus_set_rate). */
    NutSpiBusSetBits            /*!< Set number of data bits of a specified device (bus_set_bits). */
};

#include "stm32_spi.c"