net_bsp.c

ucosII在DRAGONBALL MX21上的移植 开发环境为IAR

/*
*********************************************************************************************************
*                                              uC/TCP-IP
*                                      The Embedded TCP/IP Stack
*
*                            (c) Copyright 2004; Micrium, Inc.; Weston, FL
*
*                   All rights reserved.  Protected by international copyright laws.
*                   Knowledge of the source code may not be used to write a similar
*                   product.  This file may only be used in accordance with a license
*                   and should not be redistributed in any way.
*********************************************************************************************************
*
*                                BOARD SUPPORT PACKAGE (BSP) FUNCTIONS
*
*                                          Freescale i.MX21
*
* Filename   : net_bsp.c
* Programmer : Eric Shufro
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                            INCLUDE FILES
*********************************************************************************************************
*/

#include <includes.h>
#include <net_nic.h>

/*
*********************************************************************************************************
*                                            LOCAL DEFINES
*********************************************************************************************************
*/

#define  CS8900ABaseAddress               (*((INT16U *)0xCC000000))   /* 16 bytes long                                           */
#define  INT_ARM_PortE                                          8     /* ARM IRQ 8 is internally mapped to GPIO Interrupts       */
#define  INT_GPIO_Pin_Mask                               (1 << 11)    /* GPIO Port E, pin 11 is attached to the cs8900 INTRQ pin */
#define  PortE_Edge_Sel                                  (1 << 23)    /* Set pin 11 to high level sensitive. Bits 23:22 = 1:0    */

/*
*********************************************************************************************************
*                                            PROTOTYPES
*********************************************************************************************************
*/

extern void  NetNIC_ISR_Handler(void);

/*$PAGE*/
/*
*********************************************************************************************************
*********************************************************************************************************
*                                  NETWORK INTERFACE CARD FUNCTIONS
*********************************************************************************************************
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*                                        NETWORK INTERRUPT INITIALIZATION
*
* Description : This function is called by CS8900_Init() to to initialize the interrupt structure for the NIC.
*
* Arguments   : none
*
* Note(s)     : 1) The CS8900A is connected to external interrupt #4 on the LogicPD board because it
*                  passes through the I/O board.
*********************************************************************************************************
*/

void  NetNIC_IntInit (void)
{
     BSP_Set_IRQ_Vector(INT_ARM_PortE, NetNIC_ISR_Handler);     /* Insert the CS8900A ISR Handler into the interrupt table */
     BSP_IntEn(INT_ARM_PortE);                                  /* Enable GPIO Port E interrupts                           */
     PTE_ICR1    =   PortE_Edge_Sel;                            /* Set port E pin 11 interrupt to trigger on high level    */
     PTE_IMR     =   INT_GPIO_Pin_Mask;                         /* Unmask Port E, pin 11 interrupts                        */
}


/*
*********************************************************************************************************
*                                    INITIALIZE INTERRUPT CONTROLLER
*
* Description : This function is called to clear the interrupt controller associated with the NIC.
*
* Arguments   : none
*********************************************************************************************************
*/

void  NetNIC_IntClr (void)
{
    PTE_ISR |= INT_GPIO_Pin_Mask;                               /* Clear the port E, pin 11 interrupt flag                 */
}


/*$PAGE*/
/*
*********************************************************************************************************
*                                           NetNIC_Rd16()
*
* Description : Read 16-bit data value from the Ethernet chip.
*
* Argument(s) : reg_offset      Register address offset.
*
* Return(s)   : 16-bit data read from register.
*
* Caller(s)   : CS8900A_RegRd().
*
* Notes(s)    : 1) You need to know the actual physical address or location of the NIC.  From that, you
*                  simply add the offset passed to this function to this 'base' address.
*********************************************************************************************************
*/

CPU_INT16U  NetNIC_Rd16 (CPU_INT16U reg_offset)
{
   INT16U *CS8900Addr;

   CS8900Addr = &CS8900ABaseAddress;                                 /* Set a pointer to the CS8900 Base Address                */
   return CS8900Addr[reg_offset/2];                                  /* Get the data from the specified offset                  */
                                                                     /* Offset / 2 to make the offset type (8 bit) the same as  */
                                                                     /* the register type (16 bit)                              */
}


/*
*********************************************************************************************************
*                                           NetNIC_Wr16()
*
* Description : Write 16-bit data value to the NIC
*
* Argument(s) : reg_offset      Register address offset.
*
*               val             16-bit data to write to register.
*
* Return(s)   : none.
*
* Caller(s)   : CS8900A_RegRd(),
*               CS8900A_RegWr().
*
* Notes(s)    : 1) You need to know the actual physical address or location of the NIC.  From that, you
*                  simply add the offset passed to this function to this 'base' address.
*********************************************************************************************************
*/

void  NetNIC_Wr16 (CPU_INT16U reg_offset, CPU_INT16U val)
{
   INT16U *targetRegister;

   targetRegister = &CS8900ABaseAddress;                             /* declare a pointer to the cs8900 base address            */
   targetRegister[reg_offset/2] = val;                               /* Write the value to the register                         */
                                                                     /* Offset / 2 to make the offset type (8 bit) the same as  */
                                                                     /* the register type (16 bit)                              */
}


/*$PAGE*/
/*
*********************************************************************************************************
*                                         CS8900A_PwrCtrl()
*
* Description : Control power to the CS8900A, if supported by your application's hardware.  This feature
*               would be provided if power consumption is an issue in your application.
*
* Argument(s) : pwr         Control power to the CS8900A :
*
*						        NET_ON              Apply  power to   the CS8900A
*						        NET_OFF             Remove power from the CS8900A
*
* Return(s)   : none.
*
* Caller(s)   : none.
*
* Note(s)     : Not supported on the Freescale i.MX21ADS
*********************************************************************************************************
*/

void  CS8900A_PwrCtrl (CPU_BOOLEAN  pwr)
{
}


/*
*********************************************************************************************************
*                                         CS8900A_Reset_Delay()
*
* Description : Delays the CS8900 initialization task for approximately 10 or more ms while the
*               CS8900 stabilizes after reset.
*
* Argument(s) : None
*
* Return(s)   : none.
*
* Caller(s)   : net_nic.c
*
* Notes       : This functiond does not require the presence of an OS. Spinning a loop for
*             : 10ms or more will suffice.
*********************************************************************************************************
*/

void  NET_BSP_CS8900A_Reset_Delay (void)
{
    OSTimeDlyHMSM(0,0,0,20);                                         /* Delay 20ms while the CS8900 resets                        */
}


/*$PAGE*/
/*
*********************************************************************************************************
*********************************************************************************************************
*                                      NETWORK MODULE FUNCTIONS
*********************************************************************************************************
*********************************************************************************************************