sio.c

ADAM2 sources (modified by Oleg)

/*-----------------------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------*/

#include "_stdio.h"
#include "support.h"
#include "env.h"
#include "hw.h"
#include "shell.h"

//wwzh add for tftp server
#ifdef TFTP_SERVER_SUPPORT
extern int tftp_update;
#endif

#if defined(DHCP_SUPPORT) || defined(FTP_SERVER_SUPPORT) || defined(TFTP_SERVER_SUPPORT)
#include "tinyip.h"
#endif

#if defined(AR7DB) || defined(AR7RD) || defined(AR7WRD)
extern unsigned int _SysFrequency;
#endif
		
#ifdef EB
#define BEO 3
#else
#define BEO 0
#endif

#define SIO0__BASE    	UARTB_BASE 
#define SIO0__OFFSET   	4
#define SIO0__EN       	1
#define SIO0__FDEN     	1
#define SIO0__RSTMASK  	0x42
#define SIO1__BASE     	UARTA_BASE
#define SIO1__OFFSET   	4
#define SIO1__EN       	1
#define SIO1__FDEN     	0
#define SIO1__RSTMASK  	0x01

#define SIO0_RDAT (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*0)+BEO))
#define SIO0_TDAT (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*0)+BEO))
#define SIO0_IE   (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*1)+BEO))
#define SIO0_IIR  (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*2)+BEO))
#define SIO0_LC   (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*3)+BEO))
#define SIO0_MC   (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*4)+BEO))
#define SIO0_LS   (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*5)+BEO))
#define SIO0_MS   (*(volatile char *)(SIO0__BASE+(SIO0__OFFSET*6)+BEO))

#define SIO1_RDAT (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*0)+BEO))
#define SIO1_TDAT (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*0)+BEO))
#define SIO1_IE   (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*1)+BEO))
#define SIO1_IIR  (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*2)+BEO))
#define SIO1_LC   (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*3)+BEO))
#define SIO1_MC   (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*4)+BEO))
#define SIO1_LS   (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*5)+BEO))
#define SIO1_MS   (*(volatile char *)(SIO1__BASE+(SIO1__OFFSET*6)+BEO))

/* LSR status */
#define SIO_LS_RX            0x01    /* Character ready             */
#define SIO_LS_OE            0x02    /* RX-ERROR: Overrun           */
#define SIO_LS_PE            0x04    /* RX-ERROR: Parity            */
#define SIO_LS_FE            0x08    /* RX-ERROR: Framing (stop bit)*/
#define SIO_LS_BI            0x10    /* 'BREAK' detected            */
#define SIO_LS_TE            0x20    /* Transmit Holding empty      */
#define SIO_LS_TI            0x40    /* Transmitter empty (IDLE)    */
#define SIO_LS_FIFOERR       0x80    /* RX-ERROR: FIFO              */

/* MSR status */
#define SIO_MS_CTS           0x10    /* Clear to send               */
#define SIO_MS_DSR           0x20    /* Data Set Ready              */
#define SIO_MS_RI            0x40    /* Ring Indicator              */
#define SIO_MS_DCD           0x80    /* Data carrier detect         */

int AvSio0Inited = 0;
int AvSio1Inited = 0;
int sflow = 0;
int siolock = 0;
int siolast = 0;

void main_Handler (void);

int SioVersion(void) 
  { 
  return(0x01); 
  } 

void SioLock(int lock)
  {
  siolock=lock;
  }

int SioGetBaud(char *str,int *rb)
  {
  char *cp,sbaud[30];
  int i,baudtmp,commas;

  baudtmp=0;
  commas=0;
  cp=sys_getenv(str);
  if (cp)
    { 
    for(i=0;(*cp)&&(i<((sizeof sbaud)-1));i++,cp++)
      sbaud[i]=*cp;
    sbaud[i]=0;
    for(cp=sbaud;*cp;cp++)
      if (*cp==',')
        {
        *cp=0;
        commas++;
        }
    baudtmp=atoui(sbaud);
    }
  if (baudtmp)
    *rb=baudtmp;
  return((baudtmp)&&(commas==4));
  }

void SioReset(void)
  {
  AvSio0Inited=0;
  AvSio1Inited=0;
  }

void SioInit(void)
  {
  int baud,avbaud,requested_baud0,requested_baud1,cpufreq;
  char ctmp;

  siolast=0;
  siolock=FALSE;
  
#if defined(AR7DB) || defined(AR7RD) || defined(AR7WRD)
  {
    int mips_async;
    mips_async = REG32_R(0xa8611a00, 25, 25);
    if(mips_async == 0)
       cpufreq=_CpuFrequency/2;
    else
       cpufreq=_SysFrequency/2;
  }
#else
  cpufreq=_PbusFrequency;
#endif

  requested_baud0=38400;
  requested_baud1=38400;
  SioGetBaud("modetty0",&requested_baud0);
  SioGetBaud("modetty1",&requested_baud1);

  if (cpufreq<500000)   //Deal with QuickTurn slowness
   {
   requested_baud0=1200;
   requested_baud1=1200;
   }

  /* Try our best to get as close to the baud rate as possible */

  AvSio0Inited=0;
  AvSio1Inited=0;
  sflow=0;

  CLK_PDCR=0;

  baud=(3686400/requested_baud0);
  if ((baud%16)>7) baud+=8;
  baud/=16;

  avbaud=((cpufreq)/requested_baud0);
  if ((avbaud%16)>7) avbaud+=8;
  avbaud/=16;

  if (SIO0__EN)
    {
    RESET_PRCR|=SIO0__RSTMASK;
    if ( ((SIO0_LS&0x60)==0x60) && ((SIO0_MC&0xc0)==0) )
      {
      if (SIO0__RSTMASK&0x40)
        GPIO_EN&=0xffffff00;   /*Enable Uart B pins to output                */
      SIO0_LC=0x03;      /*Clear Divisor latch                               */
      SIO0_IE=0x00;      /*Disable all interrupts                            */
      SIO0_MC=0x00;      /*Set modem control                                 */
      SIO0_IIR=0x00;     /*Set fifo disabled                                 */
      SIO0_LC=0x83;      /*Set divisor latch                                 */
      if (SIO0__RSTMASK)
        {
        SIO0_RDAT=avbaud;  /*Set baud rate LSB                               */
        SIO0_IE=avbaud>>8; /*Set baud rate MSB                               */
        }
       else
        {
        SIO0_RDAT=baud;  /*Set baud rate LSB                                 */
        SIO0_IE=baud>>8; /*Set baud rate MSB                                 */
        }
      SIO0_LC=0x03;      /*Set word length                                   */
      SIO0_MC=0x0f;      /*Set modem control                                 */
      SIO0_IIR=0x41;     /*Set fifo enabled(Signal at 4 bytes)               */
      AvSio0Inited=1;      

      ctmp =SIO0_LS;
      ctmp|=SIO0_RDAT;
      ctmp|=SIO0_MS;
      ctmp|=SIO0_IIR;

      if ((SIO0_MS&SIO_MS_CTS)&&(SIO0__FDEN))
        {
        SIO0_MC=0x2f;    /*Set modem control, enable AutoFlowControl         */
        sflow=1;
        }
      }
    }

  baud=(3686400/requested_baud1);
  if ((baud%16)>7) baud+=8;
  baud/=16;

  avbaud=((cpufreq)/requested_baud1);
  if ((avbaud%16)>7) avbaud+=8;
  avbaud/=16;

  if (SIO1__EN)
    {
    RESET_PRCR|=SIO1__RSTMASK;
    if ( ((SIO1_LS&0x60)==0x60) && ((SIO1_MC&0xc0)==0) )
      {
      if (SIO1__RSTMASK&0x40)
        GPIO_EN&=0xffffff00;   /*Enable Uart B pins to output                */
      SIO1_LC=0x03;      /*Clear Divisor latch                               */
      SIO1_IE=0x00;      /*Disable all interrupts                            */
      SIO1_MC=0x00;      /*Set modem control                                 */
      SIO1_IIR=0x00;     /*Set fifo disabled                                 */
      SIO1_LC=0x83;      /*Set divisor latch                                 */