Add SDCard support over SPI on STM32F103-Minimum board

configs/stm32f103-minimum/src/Makefile

@@ -61,6 +61,10 @@ ifeq ($(CONFIG_RGBLED),y)
 CSRCS += stm32_rgbled.c
 endif
 
+ifeq ($(CONFIG_MMCSD),y)
+CSRCS += stm32_mmcsd.c
+endif
+
 ifeq ($(CONFIG_AUDIO_TONE),y)
 CSRCS += stm32_tone.c
 endif

configs/stm32f103-minimum/src/stm32_bringup.c

@@ -81,6 +81,12 @@
 #  include "stm32_rtc.h"
 #endif
 
+#ifdef CONFIG_NSH_MMCSDMINOR
+#  define MMCSD_MINOR CONFIG_NSH_MMCSDMINOR
+#else
+#  define MMCSD_MINOR 0
+#endif
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -106,6 +112,15 @@ int stm32_bringup(void)
 #endif
   int ret = OK;
 
+#ifdef CONFIG_MMCSD
+  ret = stm32_mmcsd_initialize(MMCSD_MINOR);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "Failed to initialize SD slot %d: %d\n", ret);
+      return ret;
+    }
+#endif
+
 #ifdef CONFIG_PWM
   /* Initialize PWM and register the PWM device. */
 

configs/stm32f103-minimum/src/stm32_mmcsd.c

@@ -0,0 +1,129 @@
+/*****************************************************************************
+ * configs/stm32f103-minimum/src/stm32_mmcsd.c
+ *
+ *   Copyright (C) 2017 Greg Nutt. All rights reserved.
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *
+ * 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 <debug.h>
+#include <nuttx/config.h>
+#include <nuttx/mmcsd.h>
+#include <nuttx/spi/spi.h>
+#include <pthread.h>
+#include <sched.h>
+#include <semaphore.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "stm32.h"
+#include "stm32f103_minimum.h"
+#include "stm32_spi.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef CONFIG_STM32_SPI1
+#  error "SD driver requires CONFIG_STM32_SPI1 to be enabled"
+#endif
+
+#ifdef CONFIG_DISABLE_MOUNTPOINT
+#  error "SD driver requires CONFIG_DISABLE_MOUNTPOINT to be disabled"
+#endif
+
+/*****************************************************************************
+ * Private Definitions
+ ****************************************************************************/
+
+static const int SD_SPI_PORT = 1; /* SD is connected to SPI1 port */
+static const int SD_SLOT_NO  = 0; /* There is only one SD slot */
+
+/*****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/* NOTE:  We are using a SDCard adapter/module without Card Detect pin!
+ * Then we don't need to Card Detect callback here.
+ */
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: stm32_spi1register
+ *
+ * Description:
+ *   Registers media change callback
+ ****************************************************************************/
+
+int stm32_spi1register(struct spi_dev_s *dev, spi_mediachange_t callback,
+                       void *arg)
+{
+  spiinfo("INFO: Registering spi1 device\n");
+  return OK;
+}
+
+/*****************************************************************************
+ * Name: stm32_mmcsd_initialize
+ *
+ * Description:
+ *   Initialize SPI-based SD card and card detect thread.
+ ****************************************************************************/
+
+int stm32_mmcsd_initialize(int minor)
+{
+  struct spi_dev_s *spi;
+  int rv;
+
+  mcinfo("INFO: Initializing mmcsd card\n");
+
+  spi = stm32_spibus_initialize(SD_SPI_PORT);
+  if (spi == NULL)
+    {
+      mcerr("ERROR: Failed to initialize SPI port %d\n", SD_SPI_PORT);
+      return -ENODEV;
+    }
+
+  rv = mmcsd_spislotinitialize(minor, SD_SLOT_NO, spi);
+  if (rv < 0)
+    {
+      mcerr("ERROR: Failed to bind SPI port %d to SD slot %d\n",
+            SD_SPI_PORT, SD_SLOT_NO);
+      return rv;
+    }
+
+  spiinfo("INFO: mmcsd card has been initialized successfully\n");
+  return OK;
+}

configs/stm32f103-minimum/src/stm32_spi.c

@@ -85,6 +85,10 @@ void stm32_spidev_initialize(void)
 #ifdef CONFIG_WL_NRF24L01
   stm32_configgpio(GPIO_NRF24L01_CS);         /* nRF24L01 chip select */
 #endif
+
+#ifdef CONFIG_MMCSD_SPI
+  stm32_configgpio(GPIO_SDCARD_CS);           /* SD/MMC Card chip select */
+#endif
 }
 
 /****************************************************************************
@@ -136,6 +140,13 @@ void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid,
       stm32_gpiowrite(GPIO_NRF24L01_CS, !selected);
     }
 #endif
+
+#ifdef CONFIG_MMCSD_SPI
+  if (devid == SPIDEV_MMCSD)
+    {
+      stm32_gpiowrite(GPIO_SDCARD_CS, !selected);
+    }
+#endif
 }
 
 uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
@@ -149,6 +160,13 @@ uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
     }
 #endif
 
+#ifdef CONFIG_MMCSD_SPI
+  if (devid == SPIDEV_MMCSD)
+    {
+       status |= SPI_STATUS_PRESENT;
+    }
+#endif
+
   return status;
 }
 #endif

configs/stm32f103-minimum/src/stm32f103_minimum.h

@@ -89,6 +89,9 @@
 #define GPIO_NRF24L01_CS  (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
                            GPIO_OUTPUT_SET|GPIO_PORTA|GPIO_PIN4)
 
+#define GPIO_SDCARD_CS    (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
+                           GPIO_OUTPUT_SET|GPIO_PORTA|GPIO_PIN4)
+
 #define STM32_LCD_RST     (GPIO_OUTPUT|GPIO_CNF_OUTPP|GPIO_MODE_50MHz|\
                            GPIO_OUTPUT_SET|GPIO_PORTA|GPIO_PIN3)