Beginnings of PIC32 build environment

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3619 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 428 insertions, 0 deletions

diff --git a/nuttx/arch/mips/src/pic32mx/pic32mx-internal.h b/nuttx/arch/mips/src/pic32mx/pic32mx-internal.h
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+/************************************************************************************
+ * arch/mips/src/pic32mx/pic32mx-internal.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_MIPS_SRC_PIC32MX_PIC32MX_INTERNAL_H
+#define __ARCH_MIPS_SRC_PIC32MX_PIC32MX_INTERNAL_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "up_internal.h"
+#include "chip.h"
+
+/************************************************************************************
+ * Definitions
+ ************************************************************************************/
+
+/* Configuration ********************************************************************/
+
+/* Bit-encoded input to pic32mx_configgpio() ****************************************/
+/* To be provided */
+
+/* GPIO pin definitions *************************************************************/
+/* To be provided */
+
+/************************************************************************************
+ * Public Types
+ ************************************************************************************/
+
+typedef FAR void *DMA_HANDLE;
+typedef void (*dma_callback_t)(DMA_HANDLE handle, void *arg, int result);
+
+/* The following is used for sampling DMA registers when CONFIG DEBUG_DMA is selected */
+
+#ifdef CONFIG_DEBUG_DMA
+struct pic32mx_dmaglobalregs_s
+{
+  /* Global Registers */
+#warning "Missing definitions"
+};
+
+struct pic32mx_dmachanregs_s
+{
+  /* Channel Registers */
+#warning "Missing definitions"
+};
+
+struct pic32mx_dmaregs_s
+{
+  /* Global Registers */
+
+  struct pic32mx_dmaglobalregs_s gbl;
+
+  /* Channel Registers */
+
+  struct pic32mx_dmachanregs_s   ch;
+};
+#endif
+
+/************************************************************************************
+ * Inline Functions
+ ************************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/************************************************************************************
+ * Public Data
+ ************************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/************************************************************************************
+ * Public Function Prototypes
+ ************************************************************************************/
+
+/************************************************************************************
+ * Name: pic32mx_clockconfig
+ *
+ * Description:
+ *   Called to initialize the PIC32MX.  This does whatever setup is needed to put the
+ *   MCU in a usable state.  This includes the initialization of clocking using the
+ *   settings in board.h.
+ *
+ ************************************************************************************/
+
+EXTERN void pic32mx_clockconfig(void);
+
+/************************************************************************************
+ * Name: pic32mx_lowsetup
+ *
+ * Description:
+ *   Called at the very beginning of _start.  Performs low level initialization
+ *   including setup of the console UART.  This UART done early so that the serial
+ *   console is available for debugging very early in the boot sequence.
+ *
+ ************************************************************************************/
+
+EXTERN void pic32mx_lowsetup(void);
+
+/************************************************************************************
+ * Name: pic32mx_gpioirqinitialize
+ *
+ * Description:
+ *   Initialize logic to support a second level of interrupt decoding for GPIO pins.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_GPIO_IRQ
+EXTERN void pic32mx_gpioirqinitialize(void);
+#else
+#  define pic32mx_gpioirqinitialize()
+#endif
+
+/************************************************************************************
+ * Name: pic32mx_configgpio
+ *
+ * Description:
+ *   Configure a GPIO pin based on bit-encoded description of the pin.
+ *
+ ************************************************************************************/
+
+EXTERN int pic32mx_configgpio(uint16_t cfgset);
+
+/************************************************************************************
+ * Name: pic32mx_gpiowrite
+ *
+ * Description:
+ *   Write one or zero to the selected GPIO pin
+ *
+ ************************************************************************************/
+
+EXTERN void pic32mx_gpiowrite(uint16_t pinset, bool value);
+
+/************************************************************************************
+ * Name: pic32mx_gpioread
+ *
+ * Description:
+ *   Read one or zero from the selected GPIO pin
+ *
+ ************************************************************************************/
+
+EXTERN bool pic32mx_gpioread(uint16_t pinset);
+
+/************************************************************************************
+ * Name: pic32mx_gpioirqenable
+ *
+ * Description:
+ *   Enable the interrupt for specified GPIO IRQ
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_GPIO_IRQ
+EXTERN void pic32mx_gpioirqenable(int irq);
+#else
+#  define pic32mx_gpioirqenable(irq)
+#endif
+
+/************************************************************************************
+ * Name: pic32mx_gpioirqdisable
+ *
+ * Description:
+ *   Disable the interrupt for specified GPIO IRQ
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_GPIO_IRQ
+EXTERN void pic32mx_gpioirqdisable(int irq);
+#else
+#  define pic32mx_gpioirqdisable(irq)
+#endif
+
+/************************************************************************************
+ * Function:  pic32mx_dumpgpio
+ *
+ * Description:
+ *   Dump all GPIO registers associated with the base address of the provided pinset.
+ *
+ ************************************************************************************/
+
+#ifdef CONFIG_DEBUG_GPIO
+EXTERN int pic32mx_dumpgpio(uint16_t pinset, const char *msg);
+#else
+#  define pic32mx_dumpgpio(p,m)
+#endif
+
+/************************************************************************************
+ * Name:  pic32mx_spiNselect, pic32mx_spiNstatus, and pic32mx_spiNcmddata
+ *
+ * Description:
+ *   These external functions must be provided by board-specific logic.  They are
+ *   implementations of the select, status, and cmddata methods of the SPI interface
+ *   defined by struct spi_ops_s (see include/nuttx/spi.h). All other methods 
+ *   including up_spiinitialize()) are provided by common PIC32MX logic.  To use
+ *   this common SPI logic on your board:
+ *
+ *   1. Provide logic in pic32mx_boardinitialize() to configure SPI/SSP chip select
+ *      pins.
+ *   2. Provide pic32mx_spiNselect() and pic32mx_spiNstatus() functions
+ *      in your board-specific logic.  These functions will perform chip selection
+ *      and status operations using GPIOs in the way your board is configured.
+ *   2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
+ *      pic32mx_spiNcmddata() functions in your board-specific logic.  These
+ *      functions will perform cmd/data selection operations using GPIOs in the way
+ *      your board is configured.
+ *   3. Add a call to up_spiinitialize() in your low level application
+ *      initialization logic
+ *   4. The handle returned by up_spiinitialize() may then be used to bind the
+ *      SPI driver to higher level logic (e.g., calling 
+ *      mmcsd_spislotinitialize(), for example, will bind the SPI driver to
+ *      the SPI MMC/SD driver).
+ *
+ ************************************************************************************/
+
+struct spi_dev_s;
+enum spi_dev_e;
+
+#ifdef CONFIG_PIC32MX_SPI1
+EXTERN void  pic32mx_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
+EXTERN uint8_t pic32mx_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
+#ifdef CONFIG_SPI_CMDDATA
+EXTERN int pic32mx_spi1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
+#endif
+#endif
+#ifdef CONFIG_PIC32MX_SPI2
+EXTERN void  pic32mx_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
+EXTERN uint8_t pic32mx_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
+#ifdef CONFIG_SPI_CMDDATA
+EXTERN int pic32mx_spi2cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
+#endif
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_spiflush
+ *
+ * Description:
+ *   Flush and discard any words left in the RX fifo.  This can be called
+ *   from ssp0/1select after a device is deselected (if you worry about such
+ *   things).
+ *
+ * Input Parameters:
+ *   dev - Device-specific state data
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+struct spi_dev_s;
+#if defined(CONFIG_PIC32MX_SPI1) || defined(CONFIG_PIC32MX_SPI2)
+EXTERN void pic32mx_spiflush(FAR struct spi_dev_s *dev);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmainitialize
+ *
+ * Description:
+ *   Initialize the GPDMA subsystem.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN void pic32mx_dmainitilaize(void);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmachannel
+ *
+ * Description:
+ *   Allocate a DMA channel.  This function sets aside a DMA channel and
+ *   gives the caller exclusive access to the DMA channel.
+ *
+ * Returned Value:
+ *   One success, this function returns a non-NULL, void* DMA channel
+ *   handle.  NULL is returned on any failure.  This function can fail only
+ *   if no DMA channel is available.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN DMA_HANDLE pic32mx_dmachannel(void);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmafree
+ *
+ * Description:
+ *   Release a DMA channel.  NOTE:  The 'handle' used in this argument must
+ *   NEVER be used again until pic32mx_dmachannel() is called again to re-gain
+ *   a valid handle.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN void pic32mx_dmafree(DMA_HANDLE handle);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmasetup
+ *
+ * Description:
+ *   Configure DMA for one transfer.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN int pic32mx_dmarxsetup(DMA_HANDLE handle,
+                            uint32_t control, uint32_t config,
+                            uint32_t srcaddr, uint32_t destaddr,
+                            size_t nbytes);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmastart
+ *
+ * Description:
+ *   Start the DMA transfer
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN int pic32mx_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmastop
+ *
+ * Description:
+ *   Cancel the DMA.  After pic32mx_dmastop() is called, the DMA channel is
+ *   reset and pic32mx_dmasetup() must be called before pic32mx_dmastart() can be
+ *   called again
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+EXTERN void pic32mx_dmastop(DMA_HANDLE handle);
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmasample
+ *
+ * Description:
+ *   Sample DMA register contents
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+#ifdef CONFIG_DEBUG_DMA
+EXTERN void pic32mx_dmasample(DMA_HANDLE handle, struct pic32mx_dmaregs_s *regs);
+#else
+#  define pic32mx_dmasample(handle,regs)
+#endif
+#endif
+
+/****************************************************************************
+ * Name: pic32mx_dmadump
+ *
+ * Description:
+ *   Dump previously sampled DMA register contents
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_pic32mx_GPDMA
+#ifdef CONFIG_DEBUG_DMA
+EXTERN void pic32mx_dmadump(DMA_HANDLE handle, const struct pic32mx_dmaregs_s *regs,
+                          const char *msg);
+#else
+#  define pic32mx_dmadump(handle,regs,msg)
+#endif
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ARCH_MIPS_SRC_PIC32MX_PIC32MX_INTERNAL_H */