fifo.h

RT-Thread是发展中的下一代微内核嵌入式实时操作系统

/*
 * File      : fifo.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://openlab.rt-thread.com/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-08-17     Vai          Nintendo DS(ARM7TDMI part) version
 */

#ifndef __FIFO_H__
#define __FIFO_H__

/**
 * @addtogroup NDS
 */
/*@{*/

/* 
 * Fifo commands are encoded as follows:
 * +--------------------------------------------------------------+
 * |3 bits FIFO_TYPE | 29 bits type data (subcommands, data, ...) |
 * +--------------------------------------------------------------+
 */
#define FIFO_FIRMWARE (0 << 29)
#define FIFO_BUTTONS  (1 << 29)
#define FIFO_TOUCH    (2 << 29)
#define FIFO_MIC      (3 << 29)
#define FIFO_WIFI     (4 << 29)
#define FIFO_SOUND    (5 << 29)
#define FIFO_POWER    (6 << 29)
#define FIFO_TIME     (7 << 29)
#define FIFO_GET_TYPE(x) (((x)) & 0xe0000000)
#define FIFO_GET_TYPE_DATA(x) ((x) & 0x1fffffff)

#define FIFO_HIGH_BITS  (1<<16)
#define FIFO_LOW_BITS   (1<<17)

/* 
 * Fifo commands for firmware dumper.
 * +-------------------------------------------------------------------------+
 * |3 bits FIFO_FIRMWARE | 5 bits FIFO_CMD_FIRMWARE_x | 24 bits command data |
 * +-------------------------------------------------------------------------+
 */
#define FIFO_FIRMWARE_CMD(c, d) (FIFO_FIRMWARE | ((c & 0x1f) << 24) | (d & 0x00ffffff))
#define FIFO_FIRMWARE_GET_CMD(c) ((c >> 24) & 0x1f)
#define FIFO_FIRMWARE_GET_DATA(d) (d & 0x00ffffff)
#define FIFO_FIRMWARE_DECODE_ADDRESS(a) ((a) + 0x02000000)

enum FIFO_FIRMWARE_CMDS {
    FIFO_FIRMWARE_CMD_BUFFER_ADDRESS,
    FIFO_FIRMWARE_CMD_READ
};
	
/* 
 * Fifo wifi commands are encoded as follows:
 * +-----------------------------------------------------------------+
 * |3 bits FIFO_WIFI | 5 bits FIFO_CMD_WIFI_x | 24 bits command data |
 * +-----------------------------------------------------------------+
 *  
 *  How command data is used depends on the command.
 *  Some commands, like recieve and transmit, send offsets into 0x02 RAM
 *  telling the other side where to read packet data from.
 *  Other commands, like those for setting WEP keys or the essid, further
 *  divide the command data into flags and actual data.
 */
#define FIFO_WIFI_CMD(c, d) (FIFO_WIFI | ((c & 0x1f) << 24) | (d & 0x00ffffff))
#define FIFO_WIFI_GET_CMD(c) ((c >> 24) & 0x1f)
#define FIFO_WIFI_GET_DATA(d) (d & 0x00ffffff)
#define FIFO_WIFI_DECODE_ADDRESS(a) ((a) + 0x02000000)

enum FIFO_WIFI_CMDS {
    FIFO_WIFI_CMD_UP,
    FIFO_WIFI_CMD_DOWN,
    FIFO_WIFI_CMD_MAC_QUERY,
    FIFO_WIFI_CMD_TX,
    FIFO_WIFI_CMD_TX_COMPLETE,
    FIFO_WIFI_CMD_RX,
    FIFO_WIFI_CMD_RX_COMPLETE,
    FIFO_WIFI_CMD_STATS_QUERY,
    FIFO_WIFI_CMD_SET_ESSID,
    FIFO_WIFI_CMD_SET_CHANNEL,
    FIFO_WIFI_CMD_SET_WEPKEY,
    FIFO_WIFI_CMD_SET_WEPKEYID,
    FIFO_WIFI_CMD_SET_WEPMODE,
    FIFO_WIFI_CMD_AP_QUERY,
    FIFO_WIFI_CMD_SCAN,
    FIFO_WIFI_CMD_SET_AP_MODE,
    FIFO_WIFI_CMD_GET_AP_MODE,
};

/* 
 * Sound driver commands
 * +-------------------------------------------------------+
 * |3 bits FIFO_SOUND | 1bit unused | 28 bits command data |
 * +-------------------------------------------------------+
 */
#define FIFO_SOUND_CHANNELS	(1<<24)
#define FIFO_SOUND_DMA_ADDRESS	(2<<24)
#define FIFO_SOUND_DMA_SIZE	(3<<24)
#define FIFO_SOUND_FORMAT	(4<<24)
#define FIFO_SOUND_RATE		(5<<24)
#define FIFO_SOUND_TRIGGER	(6<<24)
#define FIFO_SOUND_POWER	(7<<24)

/* FIFO registers */
#define NDS_REG_IPCFIFOSEND (*(volatile unsigned int*) 0x04000188)
#define NDS_REG_IPCFIFORECV (*(volatile unsigned int*) 0x04100000)
#define NDS_REG_IPCFIFOCNT  (*(volatile unsigned short*) 0x04000184)

/* bits in NDS_REG_IPCFIFOCNT */
#define FIFO_SEND_FULL	(1 << 1)
#define FIFO_CLEAR	(1 << 3)
#define FIFO_EMPTY	(1 << 8)
#define FIFO_IRQ_ENABLE (1 << 10)
#define FIFO_ERROR	(1 << 14)
#define FIFO_ENABLE	(1 << 15)

/*@}*/

#endif