936df1bcb5
Squashed commit of the following:
Change all calls to usleep() in the OS proper to calls to nxsig_usleep()
sched/signal: Add a new OS internal function nxsig_usleep() that is functionally equivalent to usleep() but does not cause a cancellaption point and does not modify the errno variable.
sched/signal: Add a new OS internal function nxsig_sleep() that is functionally equivalent to sleep() but does not cause a cancellaption point.
220 lines
6.8 KiB
C
220 lines
6.8 KiB
C
/*****************************************************************************
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* configs/stm32butterfly2/src/stm32_mmcsd.c
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*
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* Copyright (C) 2016-2017 Michał Łyszczek. All rights reserved.
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* Author: Michał Łyszczek <michal.lyszczek@gmail.com>
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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 <pthread.h>
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#include <sched.h>
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#include <semaphore.h>
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#include <time.h>
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#include <unistd.h>
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#include <debug.h>
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#include <nuttx/mmcsd.h>
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#include <nuttx/signal.h>
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#include <nuttx/spi/spi.h>
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#include "stm32.h"
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#include "stm32_butterfly2.h"
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#include "stm32_spi.h"
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/*****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_STM32_SPI1
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# error "SD driver requires CONFIG_STM32_SPI1 to be enabled"
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#endif
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#ifdef CONFIG_DISABLE_MOUNTPOINT
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# error "SD driver requires CONFIG_DISABLE_MOUNTPOINT to be disabled"
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#endif
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/*****************************************************************************
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* Private Definitions
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****************************************************************************/
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static const int SD_SPI_PORT = 1; /* SD is connected to SPI1 port */
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static const int SD_SLOT_NO = 0; /* There is only one SD slot */
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/* Media changed callback */
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static spi_mediachange_t g_chmediaclbk;
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/* Argument for media changed callback */
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static void *g_chmediaarg;
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/* Semafor to inform stm32_cd_thread that card was inserted or pulled out */
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static sem_t g_cdsem;
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/*****************************************************************************
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* Private Functions
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****************************************************************************/
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/*****************************************************************************
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* Name: stm32_cd_thread
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*
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* Description:
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* Working thread to call mediachanged function when card is inserted or
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* pulled out.
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****************************************************************************/
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static void *stm32_cd_thread(void *arg)
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{
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(void)arg;
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spiinfo("INFO: Runnig card detect thread\n");
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while (1)
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{
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nxsem_wait(&g_cdsem);
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spiinfo("INFO: Card has been inserted, initializing\n");
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if (g_chmediaclbk)
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{
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/* Card doesn't seem to initialize properly without letting it to
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* rest for a millsecond or so.
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*/
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nxsig_usleep(1 * 1000);
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g_chmediaclbk(g_chmediaarg);
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}
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}
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return NULL;
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}
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/*****************************************************************************
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* Name: stm32_cd
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*
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* Description:
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* Card detect interrupt handler.
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****************************************************************************/
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static int stm32_cd(int irq, void *context, void *arg)
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{
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static const int debounce_time = 100; /* [ms] */
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static uint32_t now = 0;
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static uint32_t prev = 0;
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struct timespec tp;
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clock_gettime(CLOCK_MONOTONIC, &tp);
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now = tp.tv_sec * 1000 + tp.tv_nsec / 1000000;
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/* When inserting card, card detect plate might bounce causing this
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* interrupt to be called many time on single card insert/deinsert. Thus
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* we are allowing only one interrupt every 100ms.
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*/
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if (now - debounce_time > prev)
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{
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prev = now;
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nxsem_post(&g_cdsem);
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}
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return OK;
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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: stm32_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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int stm32_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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g_chmediaclbk = callback;
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g_chmediaarg = arg;
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return OK;
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}
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/*****************************************************************************
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* Name: stm32_mmcsd_initialize
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*
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* Description:
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* Initialize SPI-based SD card and card detect thread.
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****************************************************************************/
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int stm32_mmcsd_initialize(int minor)
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{
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struct spi_dev_s *spi;
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struct sched_param schparam;
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pthread_attr_t pattr;
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int rv;
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spiinfo("INFO: Initializing mmcsd card\n");
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if ((spi = stm32_spibus_initialize(SD_SPI_PORT)) == NULL)
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{
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ferr("failed to initialize SPI port %d\n", SD_SPI_PORT);
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return -ENODEV;
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}
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if ((rv = mmcsd_spislotinitialize(minor, SD_SLOT_NO, spi)) < 0)
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{
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ferr("failed to bind SPI port %d to SD slot %d\n", SD_SPI_PORT,
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SD_SLOT_NO);
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return rv;
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}
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(void)stm32_gpiosetevent(GPIO_SD_CD, true, true, true, stm32_cd, NULL);
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nxsem_init(&g_cdsem, 0, 0);
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pthread_attr_init(&pattr);
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#ifdef CONFIG_DEBUG_FS
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pthread_attr_setstacksize(&pattr, 1024);
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#else
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pthread_attr_setstacksize(&pattr, 256);
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#endif
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schparam.sched_priority = 50;
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pthread_attr_setschedparam(&pattr, &schparam);
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pthread_create(NULL, &pattr, stm32_cd_thread, NULL);
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spiinfo("INFO: mmcsd card has been initialized successfully\n");
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return OK;
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}
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