2012-09-13 20:32:24 +02:00
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/************************************************************************************
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2015-03-21 17:58:58 +01:00
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* configs/lm3s6965-ek/src/lm_ssi.c
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2012-09-13 20:32:24 +02:00
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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2013-07-01 16:11:54 +02:00
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#include <nuttx/spi/spi.h>
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2012-09-13 20:32:24 +02:00
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "chip.h"
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2014-03-08 20:29:09 +01:00
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#include "tiva_gpio.h"
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2015-12-29 22:44:56 +01:00
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#include "lm3s6965-ek.h"
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2012-09-13 20:32:24 +02:00
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/* The LM3S6965 Eval Kit microSD CS is on SSI0 */
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2014-12-21 22:23:37 +01:00
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#if defined(CONFIG_TIVA_SSI0) /* || defined(CONFIG_TIVA_SSI1) */
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2012-09-13 20:32:24 +02:00
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/************************************************************************************
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2015-03-21 17:58:58 +01:00
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* Pre-processor Definitions
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2012-09-13 20:32:24 +02:00
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************************************************************************************/
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2016-06-13 17:44:12 +02:00
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/* CONFIG_DEBUG_SPI enables debug output from this file */
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2012-09-13 20:32:24 +02:00
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2016-06-13 17:44:12 +02:00
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#ifdef CONFIG_DEBUG_SPI
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# define ssi_dumpgpio(m) tiva_dumpgpio(SDCCS_GPIO, m)
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2012-09-13 20:32:24 +02:00
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#else
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# define ssi_dumpgpio(m)
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/************************************************************************************
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2016-02-04 17:41:41 +01:00
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* Name: lm_ssidev_initialize
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2012-09-13 20:32:24 +02:00
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the LM3S6965 Eval Kit.
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*
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************************************************************************************/
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2016-02-04 17:41:41 +01:00
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void weak_function lm_ssidev_initialize(void)
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2012-09-13 20:32:24 +02:00
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{
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/* Configure the SPI-based microSD CS GPIO */
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2016-02-04 17:41:41 +01:00
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ssi_dumpgpio("lm_ssidev_initialize() Entry)");
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2014-03-08 20:29:09 +01:00
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tiva_configgpio(SDCCS_GPIO);
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2012-09-13 20:32:24 +02:00
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#ifdef CONFIG_NX_LCDDRIVER
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2014-03-08 20:29:09 +01:00
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tiva_configgpio(OLEDCS_GPIO);
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2012-09-13 20:32:24 +02:00
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#endif
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2016-02-04 17:41:41 +01:00
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ssi_dumpgpio("lm_ssidev_initialize() Exit");
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2012-09-13 20:32:24 +02:00
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}
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/****************************************************************************
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2016-02-04 17:36:39 +01:00
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* The external functions, tiva_ssiselect and tiva_ssistatus must be provided
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2012-09-13 20:32:24 +02:00
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* by board-specific logic. The are implementations of the select and status
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2013-07-01 16:11:54 +02:00
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* methods SPI interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
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2016-02-04 17:36:39 +01:00
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* All othermethods (including tiva_ssibus_initialize()) are provided by common
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2012-09-13 20:32:24 +02:00
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* logic. To use this common SPI logic on your board:
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*
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2016-02-04 17:36:39 +01:00
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* 1. Provide tiva_ssiselect() and tiva_ssistatus() functions in your
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2012-09-13 20:32:24 +02:00
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* board-specific logic. This function will perform chip selection and
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* status operations using GPIOs in the way your board is configured.
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2016-02-04 17:36:39 +01:00
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* 2. Add a call to tiva_ssibus_initialize() in your low level initialization
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2012-09-13 20:32:24 +02:00
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* logic
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2016-02-04 17:36:39 +01:00
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* 3. The handle returned by tiva_ssibus_initialize() may then be used to bind the
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2014-04-14 00:22:22 +02:00
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* SPI driver to higher level logic (e.g., calling
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2012-09-13 20:32:24 +02:00
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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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2017-04-28 18:28:09 +02:00
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void tiva_ssiselect(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
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2012-09-13 20:32:24 +02:00
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{
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2016-06-15 18:41:13 +02:00
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spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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2016-02-04 17:36:39 +01:00
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ssi_dumpgpio("tiva_ssiselect() Entry");
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2012-09-13 20:32:24 +02:00
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if (devid == SPIDEV_MMCSD)
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{
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/* Assert the CS pin to the card */
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2014-03-08 20:29:09 +01:00
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tiva_gpiowrite(SDCCS_GPIO, !selected);
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2012-09-13 20:32:24 +02:00
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}
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#ifdef CONFIG_NX_LCDDRIVER
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else if (devid == SPIDEV_DISPLAY)
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{
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/* Assert the CS pin to the display */
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2014-03-08 20:29:09 +01:00
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tiva_gpiowrite(OLEDCS_GPIO, !selected);
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2012-09-13 20:32:24 +02:00
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}
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#endif
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2016-02-04 17:36:39 +01:00
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ssi_dumpgpio("tiva_ssiselect() Exit");
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2012-09-13 20:32:24 +02:00
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}
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2017-04-28 18:28:09 +02:00
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uint8_t tiva_ssistatus(FAR struct spi_dev_s *dev, uint32_t devid)
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2012-09-13 20:32:24 +02:00
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{
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2016-06-15 18:41:13 +02:00
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spiinfo("Returning SPI_STATUS_PRESENT\n");
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2012-09-13 20:32:24 +02:00
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return SPI_STATUS_PRESENT;
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}
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2014-12-21 22:23:37 +01:00
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#endif /* CONFIG_TIVA_SSI0 || CONFIG_TIVA_SSI1 */
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