fragments of MCI driver

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2551 42af7a65-404d-4744-a932-0658087f49c3

arch/arm/src/sam3u/chip.h

 /************************************************************************************
  * arch/arm/src/sam3u/chip.h
  *
- *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,7 +52,7 @@
 #  define CONFIG_SAM3U_SRAM0_SIZE   0x00008000  /* 32Kb */
 #  define CONFIG_SAM3U_SRAM1_SIZE   0x00004000  /* 16Kb */
 #  define CONFIG_SAM3U_NFCSRAM_SIZE 0x00001000  /*  4Kb */
-
+#  define CONFIG_SAM3U_MCI2         1
 #else
 #  error "Unknown SAM3U chip type"
 #endif

arch/arm/src/sam3u/sam3u_hsmci.h

@@ -132,6 +132,7 @@
 
 #define HSMCI_DTOR_DTOCYC_SHIFT     (0)       /* Bits 0-3: Data Timeout Cycle Number */
 #define HSMCI_DTOR_DTOCYC_MASK      (15 << HSMCI_DTOR_DTOCYC_SHIFT)
+#  define HSMCI_DTOR_DTOCYC_MAX     (15 << HSMCI_DTOR_DTOCYC_SHIFT)
 #define HSMCI_DTOR_DTOMUL_SHIFT     (4)       /* Bits 4-6: Data Timeout Multiplier */
 #define HSMCI_DTOR_DTOMUL_MASK      (7 << HSMCI_DTOR_DTOMUL_SHIFT)
 #  define HSMCI_DTOR_DTOMUL_1       (0 << HSMCI_DTOR_DTOMUL_SHIFT)
@@ -142,6 +143,7 @@
 #  define HSMCI_DTOR_DTOMUL_4096    (5 << HSMCI_DTOR_DTOMUL_SHIFT)
 #  define HSMCI_DTOR_DTOMUL_65536   (6 << HSMCI_DTOR_DTOMUL_SHIFT)
 #  define HSMCI_DTOR_DTOMUL_1048576 (7 << HSMCI_DTOR_DTOMUL_SHIFT)
+#  define HSMCI_DTOR_DTOMUL_MAX     (7 << HSMCI_DTOR_DTOMUL_SHIFT)
 
 /* HSMCI SDCard/SDIO Register */
 

arch/arm/src/sam3u/sam3u_internal.h

@@ -231,6 +231,7 @@
 #define GPIO_MCI_DAT7             (GPIO_PERIPHA|GPIO_CFG_PULLUP|GPIO_PORT_PIOB|GPIO_PIN31)
 #define GPIO_MCI_CK               (GPIO_PERIPHA|GPIO_CFG_DEFAULT|GPIO_PORT_PIOA|GPIO_PIN3)
 #define GPIO_MCI_DA               (GPIO_PERIPHA|GPIO_CFG_PULLUP|GPIO_PORT_PIOA|GPIO_PIN4)
+#define GPIO_MCI_DAT0IN           (GPIO_INPUT|GPIO_CFG_PULLUP|GPIO_PORT_PIOA|GPIO_PIN5)
 
 #define GPIO_PWMC_PWMH0           (GPIO_PERIPHA|GPIO_CFG_DEFAULT|GPIO_PORT_PIOB|GPIO_PIN0)
 #define GPIO_PWMC_PWML0           (GPIO_PERIPHB|GPIO_CFG_DEFAULT|GPIO_PORT_PIOA|GPIO_PIN7)
@@ -293,6 +294,9 @@
  * Public Types
  ************************************************************************************/
 
+typedef FAR void *DMA_HANDLE;
+typedef void (*dma_callback_t)(DMA_HANDLE handle, uint8_t isr, void *arg);
+
 /************************************************************************************
  * Inline Functions
  ************************************************************************************/
@@ -428,6 +432,85 @@ EXTERN void sam3u_gpioirqdisable(int irq);
 #  define sam3u_gpioirqdisable(irq)
 #endif
 
+/****************************************************************************
+ * Name: sam3u_dmachannel
+ *
+ * Description:
+ *   Allocate a DMA channel.  This function sets aside a DMA channel and
+ *   gives the caller mutually exclusive access to the DMA channel.
+ *
+ * Returned Value:
+ *   One success, this function ALWAYS will return a non-NULL, DMA channel
+ *   handle.
+ *
+ ****************************************************************************/
+
+EXTERN DMA_HANDLE sam3u_dmachannel(void);
+
+/****************************************************************************
+ * Name: sam3u_dmafree
+ *
+ * Description:
+ *   Release a DMA channel.  NOTE:  The 'handle' used in this argument must
+ *   NEVER be used again until sam3u_dmachannel() is called again to
+ *   re-allocate the channel.
+ *
+ * Returned Value:
+ *   None
+ *
+ * Assumptions:
+ *   - The caller holds the DMA channel.
+ *   - There is no DMA in progress
+ *
+ ****************************************************************************/
+
+EXTERN void sam3u_dmafree(DMA_HANDLE handle);
+
+/****************************************************************************
+ * Name: sam3u_dmasetup
+ *
+ * Description:
+ *   Configure DMA before using
+ *
+ * Assumptions:
+ *   - DMA handle allocated by sam3u_dmachannel()
+ *   - No DMA in progress
+ *
+ ****************************************************************************/
+
+EXTERN void sam3u_dmasetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr,
+                           size_t ntransfers, uint32_t ccr);
+
+/****************************************************************************
+ * Name: sam3u_dmastart
+ *
+ * Description:
+ *   Start the DMA transfer
+ *
+ * Assumptions:
+ *   - DMA handle allocated by sam3u_dmachannel()
+ *   - No DMA in progress
+ *
+ ****************************************************************************/
+
+EXTERN void sam3u_dmastart(DMA_HANDLE handle, dma_callback_t callback,
+                           void *arg, bool half);
+
+/****************************************************************************
+ * Name: sam3u_dmastop
+ *
+ * Description:
+ *   Cancel the DMA.  After sam3u_dmastop() is called, the DMA channel is
+ *   reset and sam3u_dmasetup() must be called before sam3u_dmastart() can be
+ *   called again
+ *
+ * Assumptions:
+ *   - DMA handle allocated by sam3u_dmachannel()
+ *
+ ****************************************************************************/
+
+EXTERN void sam3u_dmastop(DMA_HANDLE handle);
+
 #undef EXTERN
 #if defined(__cplusplus)
 }

configs/sam3u-ek/include/board.h

@@ -2,7 +2,7 @@
  * configs/sam3u-ek/include/board.h
  * include/arch/board/board.h
  *
- *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without

configs/sam3u-ek/src/sam3uek_internal.h

@@ -2,7 +2,7 @@
  * configs/sam3uek_eval/src/sam3uek_internal.h
  * arch/arm/src/board/sam3uek_internal.n
  *
- *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -65,14 +65,13 @@
 #define GPIO_BUTTON1 (GPIO_INPUT|GPIO_CFG_PULLUP|GPIO_CFG_DEGLITCH|GPIO_PORT_PIOA|GPIO_PIN18)
 #define GPIO_BUTTON2 (GPIO_INPUT|GPIO_CFG_PULLUP|GPIO_CFG_DEGLITCH|GPIO_PORT_PIOA|GPIO_PIN19)
 
+#define IRQ_BUTTON1  SAM3U_IRQ_PA18
+#define IRQ_BUTTON2  SAM3U_IRQ_PA19
+
 /* SD Card Detect */
 
 #define GPIO_MCI_CD  (GPIO_INPUT|GPIO_CFG_PULLUP|GPIO_PORT_PIOA|GPIO_PIN25)
 
-
-#define IRQ_BUTTON1  SAM3U_IRQ_PA18
-#define IRQ_BUTTON2  SAM3U_IRQ_PA19
-
 /* SPI Chip Selects */
 
 /************************************************************************************