c501uart.h

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/* -*-C-*-
 *
 * $Revision:  $
 *   $Author:  $
 *     $Date:  $
 *
 * Copyright (c) 1996 Advanced RISC Machines Limited.
 * All Rights Reserved.
 *
 *   Project: ANGEL
 *
 *     Title: KS32C50100 UART register definitions
 */

#ifndef c501uart_h
#define c501uart_h

/* A and B correspond to UART0 and UART1, but B is the default angel
   port. This affects most of the files in this target directory */

#define C501UART_IDENT_A        1
#define C501UART_IDENT_B        0

/*
 * Layout of the Serial controller
 */

typedef struct C501UARTReg
{
    volatile unsigned int ulcon;  /* R/W */
    volatile unsigned int ucon;   /* R/W */
    volatile unsigned int ustat;  /* RO */
    volatile unsigned int utxbuf; /* WO */
    volatile unsigned int urxbuf; /* RO */
    volatile unsigned int ubrdiv; /* R/W */
} C501UARTReg;

/*
 * the Interrupt Enables are shared with other control functions:
 * be careful when playing with them!
 */

/* Note: the uart will not function (transmit or receive) if not enabled for
   interrupt or DMA */
#define IER_set(u, f)   ((u)->ucon |= (f))
#define IER_clr(u, f)   ((u)->ucon &= ~(f))
#define IER_reset(u)    ((u)->ucon &= ~(UCRRxSI | UCRTxM | UCRRxM))

/*
 * macros to control Interrupt Enable Register in various sensible ways
 */
#define c501uart_EnableTxInterrupt(u)  (IER_set((u), UCRTxM))
#define c501uart_DisableTxInterrupt(u) (IER_clr((u), UCRTxM))
#define c501uart_EnableRxInterrupt(u)  (IER_set((u), UCRRxM | UCRRxSI))
#define c501uart_DisableRxInterrupt(u) (IER_clr((u), UCRRxM | UCRRxSI))

/*
 * macros to get and put serial characters
 */

#define c501uart_SerGetChar(u)     ((u)->urxbuf)
#define c501uart_SerPutChar(u, c)  ((u)->utxbuf = (c))
#define c501uart_GetStatus(u)      ((u)->ustat)
#define c501uart_GetControlReg(u) ((u)->ucon)
#define c501uart_SetControlReg(u, v) ((u)->ucon = (v))
#define c501uart_SetLineControl(u, v) ((u)->ulcon = (v))
#define c501uart_GetInterruptStatus(u) (c501uart_GetStatus(u) & (~USRDTR))
#define c501uart_GetLineStatus(u)  (c501uart_GetStatus(u) & (USROverrun | USRFraming | USRBreak))
#define c501uart_SetBaudRate(u, v) ((u)->ubrdiv = (v))

#define c501uart_ClearIntStatus(u) (NOT_DEFINED)
#define c501uart_ClearModemInterrupt(u) (NOT_DEFINED)
#define c501uart_GetFlags(u)       (NOT_DEFINED)

#define	C501_BAUD_1200		(1301 << 4)
#define	C501_BAUD_2400		(650 << 4)
#define	C501_BAUD_4800		(324 << 4)
#define	C501_BAUD_9600		BAUD_9600
#define	C501_BAUD_19200		(80 << 4)
#define	C501_BAUD_38400		(40 << 4)
#define	C501_BAUD_57600		(26 << 4)
#define	C501_BAUD_115200	(13 << 4)

#endif /* c501uart_h */