/* ttyinit.c - ttyinit */

#include 

struct  ttycblk ttytab[Ntty];

/*------------------------------------------------------------------------
 *  ttyinit  -  Initialize buffers and modes for a tty line
 *------------------------------------------------------------------------
 */
devcall ttyinit(
          struct dentry *devptr         /* Entry in device switch table */
        )
{
        struct  ttycblk *typtr;         /* Pointer to ttytab entry      */
        struct  uart_csreg *uptr;       /* Address of UART's CSRs       */

        typtr = &ttytab[ devptr->dvminor ];

        /* Initialize values in the tty control block */

        typtr->tyihead = typtr->tyitail =       /* Set up input queue   */
                &typtr->tyibuff[0];             /*    as empty          */
        typtr->tyisem = semcreate(0);           /* Input semaphore      */
        typtr->tyohead = typtr->tyotail =       /* Set up output queue  */
                &typtr->tyobuff[0];             /*    as empty          */
        typtr->tyosem = semcreate(TY_OBUFLEN);  /* Output semaphore     */
        typtr->tyehead = typtr->tyetail =       /* Set up echo queue    */
                &typtr->tyebuff[0];             /*    as empty          */
        typtr->tyimode = TY_IMCOOKED;           /* Start in cooked mode */
        typtr->tyiecho = TRUE;                  /* Echo console input   */
        typtr->tyieback = TRUE;                 /* Honor erasing bksp   */
        typtr->tyevis = TRUE;                   /* Visual control chars */
        typtr->tyecrlf = TRUE;                  /* Echo CRLF for NEWLINE*/
        typtr->tyicrlf = TRUE;                  /* Map CR to NEWLINE    */
        typtr->tyierase = TRUE;                 /* Do erasing backspace */
        typtr->tyierasec = TY_BACKSP;           /* Primary erase char   */
        typtr->tyierasec2= TY_BACKSP2;          /* Alternate erase char */
        typtr->tyeof = TRUE;                    /* Honor eof on input   */
        typtr->tyeofch = TY_EOFCH;              /* End-of-file character*/
        typtr->tyikill = TRUE;                  /* Allow line kill      */
        typtr->tyikillc = TY_KILLCH;            /* Set line kill to ^U  */
        typtr->tyicursor = 0;                   /* Start of input line  */
        typtr->tyoflow = TRUE;                  /* Handle flow control  */
        typtr->tyoheld = FALSE;                 /* Output not held      */
        typtr->tyostop = TY_STOPCH;             /* Stop char is ^S      */
        typtr->tyostart = TY_STRTCH;            /* Start char is ^Q     */
        typtr->tyocrlf = TRUE;                  /* Send CRLF for NEWLINE*/
        typtr->tyifullc = TY_FULLCH;            /* Send ^G when buffer  */
                                                /*   is full            */

        /* Initialize the UART */

        uptr = (struct uart_csreg *)devptr->dvcsr;

        /* Set baud rate */
        io_outb(uptr->lcr, UART_LCR_DLAB);
        io_outb(uptr->dlm, 0x00);
        io_outb(uptr->dll, 0x18);

        io_outb(uptr->lcr,UART_LCR_8N1);/* 8 bit char, No Parity, 1 Stop*/
        io_outb(uptr->fcr, 0x00);       /* Disable FIFO for now         */

        /* Register the interrupt dispatcher for the tty device */

        set_evec( devptr->dvirq, (uint32)devptr->dvintr );

        /* Enable interrupts on the device: reset the transmit and      */
        /*   receive FIFOS, and set the interrupt trigger level         */

        io_outb(uptr->fcr, UART_FCR_EFIFO | UART_FCR_RRESET |
                           UART_FCR_TRESET | UART_FCR_TRIG2);

        /* Start the device */

        ttykickout(uptr);
        return OK;
}