net_phy.c

一个uc/os下tcp/ip协议栈的完整源代码

/*
*********************************************************************************************************
*                                              uC/TCP-IP
*                                      The Embedded TCP/IP Stack
*
*                          (c) Copyright 2003-2004; 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.
*********************************************************************************************************
*/

/*
*********************************************************************************************************
*
*                                        NETWORK INTERFACE CARD
*
*                                               LXT971A
*
* Filename      : net_phy.c
* Version       : V1.05
* Programmer(S) : JDH
*********************************************************************************************************
* Note(s)    : (1) Supports Intel LXT971A '3.3V Dual-Speed Fast Ethernet Transceiver' as described in
*
*                      Intel Corporation (INTEL; http://www.intel.com)
*                      (a) LXT971A       (INTEL LXT971A; Revision 249414-002)
*********************************************************************************************************
*/

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

#include  <net.h>
#include  <net_nic.h>
#include  <net_phy.h>


/*
*********************************************************************************************************
*                                         NetNIC_PhyInit()
*
* Description : Initialize phyter (ethernet link controller)
*               This instance configure the Intel LXT971A Phyter
*
* Argument(s) : none.
*
* Return(s)   : none.
*
* Caller(s)   : ???_Init.
*
* Note(s)     : none.
*********************************************************************************************************
*/

void  NetNIC_PhyInit (void)
{
                                                                /* LXT971A register 0x00: Control Register              */
                                                                /* BIT 15: Reset                                        */
                                                                /* BIT 09: Restart Auto-negotiation                     */
    NetNIC_PhyRegWr(0, 0x00, DEF_BIT_15 | DEF_BIT_09);

    LXT971A_DlyReset();


                                                                /* Clear pending interrupts                             */
    NetNIC_PhyRegRd(0, 0x13);

                                                                /* LXT971A register 0x12: Interrupt Enable Register     */
                                                                /* BIT 04: Link Status Interrupt                        */
                                                                /* BIT 01: Enable Interrupts                            */
    NetNIC_PhyRegWr(0, 0x12, DEF_BIT_04 | DEF_BIT_01);

                                                                /* LXT971A register 0x14: LED Configuration Register    */
                                                                /* LED 1: Display Speed Status (Continuous, Default)    */
                                                                /* LED 2: Display Link and Activity Status combined (Stretched) */
                                                                /* LED 3: Display Collision Status                      */
                                                                /* Stretch LED events to 100 ms                         */
                                                                /* Enable pulse stretching of all LEDs                  */
    NetNIC_PhyRegWr(0, 0x14, 0x0D3A);


    NetNIC_PhyIntInit();                                        /* Initialize external interrupt controller             */

    NetNIC_PhyAutoNeg();                                        /* Do link auto-negotiation                             */


    NetNIC_ConnStatus = NetNIC_PhyLinkState();                  /* Set NetNIC_ConnStatus according to link state        */

    if (NetNIC_ConnStatus == DEF_ON) {
        NetNIC_LinkUp();
    } else {
        NetNIC_LinkDown();
    }
}


/*
*********************************************************************************************************
*                                        NetNIC_PhyAutoNeg()
*
* Description : Do link auto-negotiation
*
* Argument(s) : none.
*
* Return(s)   : none.
*
* Caller(s)   : NetNIC_PhyInit.
*
* Note(s)     : none.
*********************************************************************************************************
*/

void  NetNIC_PhyAutoNeg (void)
{
    CPU_INT16U   i;
    CPU_BOOLEAN  link;


    i = LXT971A_INIT_AUTO_NEG_RETRIES;
    link = NetNIC_PhyAutoNegState();

    while ((link != DEF_ON) && (i > 0)) {
        LXT971A_DlyAutoNegAck();
        link = NetNIC_PhyAutoNegState();
        i--;
    }
}


/*
*********************************************************************************************************
*                                    NetNIC_PhyAutoNegState()
*
* Description : Returns state of auto-negotiation
*               This instance probe the Intel LXT971A '3.3V Dual-Speed Fast Ethernet Transceiver'
*
* Argument(s) : none.
*
* Return(s)   : State of auto-negociation (DEF_OFF = not completed, DEF_ON = completed).
*
* Caller(s)   : NetNIC_PhyInit.
*
* Note(s)     : none.
*********************************************************************************************************
*/

CPU_BOOLEAN  NetNIC_PhyAutoNegState (void)
{
    CPU_INT32U  reg_val;

                                                                /* LXT971A register 0x11: Status Register #2            */
                                                                /* BIT 07: Auto-negotiation complete                    */
    reg_val = NetNIC_PhyRegRd(0, 0x11);
    if ((reg_val & DEF_BIT_07) == DEF_BIT_07) {
        return (DEF_ON);
    } else {
        return (DEF_OFF);
    }
}


/*
*********************************************************************************************************
*                                     NetNIC_PhyLinkState()
*
* Description : Returns state of ethernet link
*               This instance probe the Intel LXT971A '3.3V Dual-Speed Fast Ethernet Transceiver'
*
* Argument(s) : none.
*
* Return(s)   : State of ethernet link (DEF_OFF = link down, DEF_ON = link up).
*
* Caller(s)   : NetNIC_PhyISR_Handler.
*
* Note(s)     : none.
*********************************************************************************************************
*/

CPU_BOOLEAN  NetNIC_PhyLinkState (void)
{
    CPU_INT32U  reg_val;

                                                                /* LXT971A register 0x11: Status Register #2            */
                                                                /* BIT 10: Link status                                  */
    reg_val = NetNIC_PhyRegRd(0, 0x11);

    if ((reg_val & DEF_BIT_10) == DEF_BIT_10) {
        return (DEF_ON);
    } else {
        return (DEF_OFF);
    }
}


/*
*********************************************************************************************************
*                                        NetNIC_ISR_Handler()
*
* Description : (1) Update NetNIC_ConnStatus according to link state
*
* Argument(s) : none.
*
* Return(s)   : none.
*
* Caller(s)   : NetNIC_ISR() [see Note #2].
*
* Note(s)     : (2) LXT971A ISR  MUST call NetNIC_PhyISR_Handler() & MUST be developer-implemented in
*
*                       \<Your Product Application>\net_isr*.*
*
*                           where
*                                   <Your Product Application>    directory path for Your Product's Application
*
*               (3) This function clears the interrupt source(s) on an external interrupt controller &, if
*                   ENABLED, MUST be developer-implemented in
*
*                       \<Your Product Application>\net_isr.c
*
*                           where
*                                   <Your Product Application>    directory path for Your Product's Application
*********************************************************************************************************
*/
void  NetNIC_PhyISR_Handler (void)
{
    NetNIC_ConnStatus = NetNIC_PhyLinkState();                  /* Set NetNIC_ConnStatus according to link state        */

    if (NetNIC_ConnStatus == DEF_ON) {
        NetNIC_LinkUp();
    } else {
        NetNIC_LinkDown();
    }

    NetNIC_PhyRegRd(0, 0x13);

    NetNIC_PhyIntClr();
}