SD fixes from Rommel + SD card detect GPIO logic for Open1788

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5737 42af7a65-404d-4744-a932-0658087f49c3

configs/open1788/include/board.h

@@ -152,21 +152,21 @@
  */
 
 #define SDCARD_CLKDIV_INIT         74   /* 400Khz  */
-#define SDCARD_INIT_CLKDIV         (BOARD_PCLK_FREQUENCY/(2*(SDCARD_CLKDIV_INIT+1)))
+#define SDCARD_INIT_CLKDIV         (SDCARD_CLKDIV_INIT+1)
 
 #define SDCARD_NORMAL_CLKDIV       1    /* DMA ON:  SDCARD_CLOCK=15MHz */
 #define SDCARD_SLOW_CLKDIV         2    /* DMA OFF: SDCARD_CLOCK=10MHz */
 
 #ifdef CONFIG_SDIO_DMA
-#  define SDCARD_MMCXFR_CLKDIV     (BOARD_PCLK_FREQUENCY/(2*(SDCARD_NORMAL_CLKDIV+1)))
+#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_NORMAL_CLKDIV+1)
 #else
-#  define SDCARD_MMCXFR_CLKDIV     (BOARD_PCLK_FREQUENCY/(2*(SDCARD_SLOW_CLKDIV+1)))
+#  define SDCARD_MMCXFR_CLKDIV     (SDCARD_SLOW_CLKDIV+1)
 #endif
 
 #ifdef CONFIG_SDIO_DMA
-#  define SDCARD_SDXFR_CLKDIV      (BOARD_PCLK_FREQUENCY/(2*(SDCARD_NORMAL_CLKDIV+1)))
+#  define SDCARD_SDXFR_CLKDIV      (SDCARD_NORMAL_CLKDIV+1)
 #else
-#  define SDCARD_SDXFR_CLKDIV      (BOARD_PCLK_FREQUENCY/(2*(SDCARD_SLOW_CLKDIV+1)))
+#  define SDCARD_SDXFR_CLKDIV      (SDCARD_SLOW_CLKDIV+1)
 #endif
 
 /* Set EMC delay values:

configs/open1788/knsh/defconfig

@@ -137,7 +137,7 @@ CONFIG_LPC17_PLL1=y
 # CONFIG_LPC17_LCD is not set
 # CONFIG_LPC17_USBHOST is not set
 # CONFIG_LPC17_USBDEV is not set
-# CONFIG_LPC17_SDCARD=y
+CONFIG_LPC17_SDCARD=y
 CONFIG_LPC17_UART0=y
 # CONFIG_LPC17_UART1 is not set
 # CONFIG_LPC17_UART2 is not set
@@ -191,7 +191,7 @@ CONFIG_LPC17_GPDMA=y
 #
 # SDIO Configuration
 #
-CONFIG_SDIO_DMA=y
+# CONFIG_SDIO_DMA=y
 CONFIG_SDIO_DMAPRIO=0x0
 # CONFIG_SDIO_WIDTH_D1_ONLY is not set
 

configs/open1788/nsh/defconfig

@@ -131,7 +131,7 @@ CONFIG_LPC17_PLL1=y
 # CONFIG_LPC17_LCD is not set
 # CONFIG_LPC17_USBHOST is not set
 # CONFIG_LPC17_USBDEV is not set
-# CONFIG_LPC17_SDCARD=y
+CONFIG_LPC17_SDCARD=y
 CONFIG_LPC17_UART0=y
 # CONFIG_LPC17_UART1 is not set
 # CONFIG_LPC17_UART2 is not set
@@ -185,7 +185,7 @@ CONFIG_LPC17_GPDMA=y
 #
 # SDIO Configuration
 #
-CONFIG_SDIO_DMA=y
+# CONFIG_SDIO_DMA=y
 CONFIG_SDIO_DMAPRIO=0x0
 # CONFIG_SDIO_WIDTH_D1_ONLY is not set
 

configs/open1788/src/lpc17_nsh.c

@@ -50,17 +50,20 @@
 #include <nuttx/usb/usbhost.h>
 
 #include "lpc17_gpio.h"
+#include "lpc17_sdcard.h"
 #include "open1788.h"
 
 /****************************************************************************
  * Pre-Processor Definitions
  ****************************************************************************/
-
 /* Configuration ************************************************************/
 
-#define NSH_HAVE_MMCSD    1
+#define NSH_HAVE_MMCSD      1
-#define NSH_HAVE_USBHOST  1
+#define NSH_HAVE_USBHOST    1
-#define NSH_HAVE_USBHDEV  1
+#define NSH_HAVE_USBHDEV    1
+
+#undef NSH_HAVE_MMCSD_CD
+#undef NSH_HAVE_MMCSD_CDINT
 
 /* MMC/SD support */
 
@@ -90,6 +93,25 @@
 #  endif
 #endif
 
+/* The SD card detect (CD) signal is on P0[13].  This signal is shared.  It is also
+ * used for MOSI1 and USB_UP_LED.  The CD pin may be disconnected.  There is a jumper
+ * on board that enables the CD pin.
+ */
+
+#ifdef NSH_HAVE_MMCSD
+#  ifdef CONFIG_MMCSD_HAVECARDDETECT
+#    define NSH_HAVE_MMCSD_CD 1
+#    ifdef CONFIG_GPIO_IRQ
+#      define NSH_HAVE_MMCSD_CDINT 1
+#    endif
+#  endif
+#endif
+
+#if defined(NSH_HAVE_MMCSD_CD) && \
+    (defined(CONFIG_LPC17_SSP1) || defined(CONFIG_LPC17_USBDEV))
+#  warning "Use of SD Card Detect pin conflicts with SSP1 and/or USB device"
+#endif
+
 /* USB Host */
 
 #ifndef CONFIG_USBHOST
@@ -188,6 +210,31 @@ static int nsh_waiter(int argc, char *argv[])
 }
 #endif
 
+/****************************************************************************
+ * Name: nsh_cdinterrupt
+ *
+ * Description:
+ *   Card detect interrupt handler.
+ *
+ ****************************************************************************/
+
+#ifdef NSH_HAVE_MMCSD_CDINT
+static int nsh_cdinterrupt(int irq, FAR void *context)
+{
+  static bool inserted = 0xff; /* Impossible value */
+  bool present;
+
+  present = !lpc17_gpioread(GPIO_SD_CD);
+  if (present != inserted)
+    {
+      sdio_mediachange(sdio, preset);
+      inserted = present;
+    }
+
+  return OK;
+}
+#endif
+
 /****************************************************************************
  * Name: nsh_sdinitialize
  *
@@ -202,6 +249,23 @@ static int nsh_sdinitialize(void)
   FAR struct sdio_dev_s *sdio;
   int ret;
 
+#ifdef NSH_HAVE_MMCSD_CD
+  /* Configure the SD card detect GPIO */
+
+  lpc17_configgpio(GPIO_SD_CD);
+
+  /* Attach an interrupt handler to get notifications when a card is
+   * inserted or deleted.
+   */
+
+#if NSH_HAVE_MMCSD_CDINT
+
+   (void)irq_attach(LPC17_IRQ_P0p13, nsh_cdinterrupt);
+   up_enable_irq(LPC17_IRQ_P0p13);
+
+#endif
+#endif
+
   /* First, get an instance of the SDIO interface */
 
   sdio = sdio_initialize(CONFIG_NSH_MMCSDSLOTNO);
@@ -217,16 +281,24 @@ static int nsh_sdinitialize(void)
   ret = mmcsd_slotinitialize(CONFIG_NSH_MMCSDMINOR, sdio);
   if (ret != OK)
     {
-      message("nsh_archinitialize: Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
+      message("nsh_archinitialize: "
+              "Failed to bind SDIO to the MMC/SD driver: %d\n",
+              ret);
+
       return ret;
     }
 
-  /* Then let's guess and say that there is a card in the slot.  I need to check to
+  /* Check if there is a card in the slot and inform the SDCARD driver.  If
-   * see if the STM3240G-EVAL board supports a GPIO to detect if there is a card in
+   * we do not support the card  detect, then let's assume that there is
-   * the slot.
+   * one.
    */
 
-   sdio_mediachange(sdio, true);
+#ifdef NSH_HAVE_MMCSD_CD
+  sdio_mediachange(sdio, !lpc17_gpioread(GPIO_SD_CD));
+#else
+  sdio_mediachange(sdio, true);
+#endif
+  return OK;
 }
 #else
 #  define nsh_sdinitialize() (OK)

configs/open1788/src/open1788.h

@@ -101,6 +101,18 @@
 #define GPIO_JOY_D   (GPIO_INTBOTH | GPIO_FLOAT | GPIO_PORT2 | GPIO_PIN19)
 #define GPIO_JOY_CTR (GPIO_INTBOTH | GPIO_FLOAT | GPIO_PORT0 | GPIO_PIN14)
 
+/* SD Card **************************************************************************/
+/* The SD card detect (CD) signal is on P0[13].  This signal is shared.  It is also
+ * used for MOSI1 and USB_UP_LED.  The CD pin may be disconnected.  There is a jumper
+ * on board that enables the CD pin.
+ */
+
+#if 0 /* The CD pin may be interrupting */
+#  define GPIO_SD_CD (GPIO_INTBOTH | GPIO_PULLUP | GPIO_PORT0 | GPIO_PIN13)
+#else
+#  define GPIO_SD_CD (GPIO_INPUT | GPIO_PULLUP | GPIO_PORT0 | GPIO_PIN13)
+#endif
+
 /************************************************************************************
  * Public Types
  ************************************************************************************/