configs/makerlisp/src/ez80_lowinit.c: Remove redundant SPI GPIO setup. This is already done in the SPI driver.
configs/makerlisp/src/ez80_spi.c: Add hooks needed by SPI driver. Move SPI MMC/SD chip selected configuration from ez80_lowinit.c to here as it done in other NuttX architectures. This enables support for multiple devices on the SPI bus.
This commit is contained in:
Gregory Nutt
parent
900c32c021
commit
cf8268f7d8
@ -99,7 +99,7 @@ extern "C"
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* Public Functions
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************************************************************************************/
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/****************************************************************************
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/************************************************************************************
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* Name: ez80_spibus_initialize
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*
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* Description:
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@ -119,24 +119,24 @@ extern "C"
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* Returned Value:
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* Valid SPI device structre reference on succcess; a NULL on failure
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*
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****************************************************************************/
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************************************************************************************/
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FAR struct spi_dev_s *ez80_spibus_initialize(int port);
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/************************************************************************************
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* The external functions, ez80_spiselect, ez80_spistatus, ans ez80_spicmddata must
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* The external functions, ez80_spiselect, ez80_spistatus, and ez80_spicmddata must
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* be provided by board-specific logic. These are implementations of the select,
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* status, and cmddata methods of the SPI interface defined by struct spi_ops_s (see
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* include/nuttx/spi/spi.h). All other methods (including ez80_spibus_initialize()) are
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* provided by common logic. To use this common SPI logic on your board:
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* include/nuttx/spi/spi.h). All other methods (including ez80_spibus_initialize())
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* are provided by common logic. To use this common SPI logic on your board:
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*
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* 1. Provide ez80_spiselect() and ez80_spistatus() functions in your board-specific
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* logic. This function will perform chip selection and status operations using
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* GPIOs in the way your board is configured.
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* 1. Provide ez80_spiselect() and ez80_spistatus() functions in your board-
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* specific logic. This function will perform chip selection and status
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* operations using GPIOs in the way your board is configured.
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* 2. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide the
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* ez80_spiscmddata() function in your board-specific logic. This function will
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* perform cmd/data selection operations using GPIOs in the way your board is
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* configured.
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* ez80_spiscmddata() function in your board-specific logic. This function
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* will perform cmd/data selection operations using GPIOs in the way your board
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* is configured.
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* 3. Add a call to ez80_spibus_initialize() in your low level initialization logic
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* 4. The handle returned by ez80_spibus_initialize() may then be used to bind the
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* SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
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@ -46,8 +46,9 @@ ifeq ($(CONFIG_ARCH_LEDS),y)
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CSRCS += ez80_leds.c
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endif
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ifeq ($(CONFIG_MMCSD_SPI),y)
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ifeq ($(CONFIG_EZ80_SPI),y)
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CSRCS += ez80_spi.c
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ifeq ($(CONFIG_MMCSD_SPI),y)
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CSRCS += ez80_spimmcsd.c
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endif
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endif
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@ -157,35 +157,13 @@ void ez80_lowinit(void)
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regval &= ~EZ80_GPIOD5;
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outp(EZ80_PB_DDR, regval);
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/* Set port B pins 7 (MOSI), 6 (MISO), 3 (SCK), 2 (/SS) to SPI */
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#ifdef CONFIG_EZ80_SPI
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/* Initialize SPI chip selects */
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regval = inp(EZ80_PB_ALT1);
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regval &= ~(EZ80_GPIOD2 | EZ80_GPIOD3 | EZ80_GPIOD6 | EZ80_GPIOD7);
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outp(EZ80_PB_ALT1, regval);
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ez80_spidev_initialize();
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#endif
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regval = inp(EZ80_PB_ALT2);
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regval &= ~(EZ80_GPIOD2 | EZ80_GPIOD3 | EZ80_GPIOD6 | EZ80_GPIOD7);
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outp(EZ80_PB_ALT2, regval);
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/* Set port B pin 4 as output, high - use for /CS */
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regval = inp(EZ80_PB_DR);
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regval |= EZ80_GPIOD4;
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outp(EZ80_PB_DR, regval);
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regval = inp(EZ80_PB_ALT1);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_ALT1, regval);
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regval = inp(EZ80_PB_ALT2);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_ALT2, regval);
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regval = inp(EZ80_PB_DDR);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_DDR, regval);
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/* Leave /sysreset asserted for a while */
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/* Leave /sysreset asserted for awhile longer */
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up_udelay(150);
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167
configs/makerlisp/src/ez80_spi.c
Normal file
167
configs/makerlisp/src/ez80_spi.c
Normal file
@ -0,0 +1,167 @@
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/*****************************************************************************
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* configs/makerlisp/src/ez80_spi.c
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*
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* Copyright (C) 2019 Greg 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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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <arch/chip/io.h>
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#include "chip.h"
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#include "up_internal.h"
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#include "ez80f91_spi.h"
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#include "makerlisp.h"
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/*****************************************************************************
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* Private Functions
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****************************************************************************/
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/* NOTE: We are using a SDCard adapter/module without Card Detect pin!
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* Then we don't need to Card Detect callback here.
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*/
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/*****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ez80_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 MakerLisp board.
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*
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****************************************************************************/
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int ez80_mmcsd_initialize(void)
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{
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#ifdef HAVE_MMCSD
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uint8_t regval;
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/* MMC/SD CS: Port B pin 4 as output */
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regval = inp(EZ80_PB_DR);
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regval |= EZ80_GPIOD4;
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outp(EZ80_PB_DR, regval);
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regval = inp(EZ80_PB_ALT1);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_ALT1, regval);
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regval = inp(EZ80_PB_ALT2);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_ALT2, regval);
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regval = inp(EZ80_PB_DDR);
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regval &= ~EZ80_GPIOD4;
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outp(EZ80_PB_DDR, regval);
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#endif
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}
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/*****************************************************************************
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* The external functions, ez80_spiselect, ez80_spistatus, and
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* ez80_spicmddata must be provided by board-specific logic. These are
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* implementations of the select, status, and cmddata methods of the SPI
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* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h). All
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* other methods (including ez80_spibus_initialize()) are provided by common
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* logic. To use this common SPI logic on your board:
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*
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* 1. Provide ez80_spiselect() and ez80_spistatus() functions in your
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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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* 2. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide
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* the ez80_spiscmddata() function in your board-specific logic. This
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* function 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 ez80_spibus_initialize() in your low level
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* initialization logic
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* 4. The handle returned by ez80_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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void ez80_spiselect(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
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{
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#ifdef HAVE_MMCSD
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if (devid == SPIDEV_MMCSD(0))
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{
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uint8_t regval;
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/* Set port B pin 4 output */
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regval = inp(EZ80_PB_DR);
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if (selected)
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{
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regval &= ~EZ80_GPIOD4;
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}
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else
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{
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regval |= EZ80_GPIOD4;
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}
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outp(EZ80_PB_DR, regval);
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}
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#endif
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}
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uint8_t ez80_spistatus(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t status = 0;
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#ifdef HAVE_MMCSD_SPI
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if (devid == SPIDEV_MMCSD(0))
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{
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/* No card detect pin.. Always claim that the card is present in
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* slot 0
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*/
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status |= SPI_STATUS_PRESENT;
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}
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#endif
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return status;
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}
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int ez80_spicmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
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{
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return -ENODEV;
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}
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#endif /* HAVE_MMCSD */
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@ -58,29 +58,17 @@
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* Private Functions
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****************************************************************************/
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/* NOTE: We are using a SDCard adapter/module without Card Detect pin!
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* Then we don't need to Card Detect callback here.
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/* NOTES:
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*
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* 1. We are using a SDCard adapter/module without Card Detect pin!
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* Then we don't need to Card Detect callback here.
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* 2. Media Change callbacks are not yet implemented in the SPI driver.
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*/
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/*****************************************************************************
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* Public Functions
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****************************************************************************/
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/*****************************************************************************
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* Name: ez80_spi1register
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*
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* Description:
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* Registers media change callback
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*
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****************************************************************************/
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int ez80_spi1register(struct spi_dev_s *dev, spi_mediachange_t callback,
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void *arg)
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{
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spiinfo("INFO: Registering spi1 device\n");
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return OK;
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}
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/*****************************************************************************
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* Name: ez80_mmcsd_initialize
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*
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@ -157,6 +157,18 @@ int ez80_bringup(void);
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int ez80_mmcsd_initialize(void);
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#endif
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/****************************************************************************
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* Name: ez80_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 MakerLisp board.
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*
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****************************************************************************/
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#ifdef CONFIG_EZ80_SPI
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void ez80_spidev_initialize(void);
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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