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/**
* @file
*
*/
/*
* COPYRIGHT (c) 1998 by Radstone Technology
*
*
* THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY
* KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK
* AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU.
*
* You are hereby granted permission to use, copy, modify, and distribute
* this file, provided that this notice, plus the above copyright notice
* and disclaimer, appears in all copies. Radstone Technology will provide
* no support for this code.
*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#ifndef _NS16550_P_H_
#define _NS16550_P_H_
#ifdef __cplusplus
extern "C" {
#endif
/*
* Define NS16550_STATIC to nothing while debugging so the entry points
* will show up in the symbol table.
*/
#define NS16550_STATIC
#define NS16550_RECEIVE_BUFFER 0
#define NS16550_TRANSMIT_BUFFER 0
#define NS16550_INTERRUPT_ENABLE 1
#define NS16550_INTERRUPT_ID 2
#define NS16550_FIFO_CONTROL 2
#define NS16550_LINE_CONTROL 3
#define NS16550_MODEM_CONTROL 4
#define NS16550_LINE_STATUS 5
#define NS16550_MODEM_STATUS 6
#define NS16550_SCRATCH_PAD 7
/*
* Define serial port interrupt enable register structure.
*/
#define SP_INT_RX_ENABLE 0x01
#define SP_INT_TX_ENABLE 0x02
#define SP_INT_LS_ENABLE 0x04
#define SP_INT_MS_ENABLE 0x08
#define NS16550_ENABLE_ALL_INTR (SP_INT_RX_ENABLE | SP_INT_TX_ENABLE)
#define NS16550_DISABLE_ALL_INTR 0x00
#define NS16550_ENABLE_ALL_INTR_EXCEPT_TX (SP_INT_RX_ENABLE)
/*
* Define serial port interrupt ID register structure.
*/
#define SP_IID_0 0x01
#define SP_IID_1 0x02
#define SP_IID_2 0x04
#define SP_IID_3 0x08
/*
* Define serial port fifo control register structure.
*/
#define SP_FIFO_ENABLE 0x01
#define SP_FIFO_RXRST 0x02
#define SP_FIFO_TXRST 0x04
#define SP_FIFO_DMA 0x08
#define SP_FIFO_RXLEVEL 0xc0
#define SP_FIFO_SIZE 16
/*
* Define serial port line control register structure.
*/
#define SP_LINE_SIZE 0x03
#define SP_LINE_STOP 0x04
#define SP_LINE_PAR 0x08
#define SP_LINE_ODD 0x10
#define SP_LINE_STICK 0x20
#define SP_LINE_BREAK 0x40
#define SP_LINE_DLAB 0x80
/*
* Line status register character size definitions.
*/
#define FIVE_BITS 0x0 /* five bits per character */
#define SIX_BITS 0x1 /* six bits per character */
#define SEVEN_BITS 0x2 /* seven bits per character */
#define EIGHT_BITS 0x3 /* eight bits per character */
/*
* Line speed divisor definition.
*/
#define NS16550_Baud(_clock, _baud_rate) \
((((_clock) == 0) ? 115200 : (_clock))/(_baud_rate*16))
/*
* Define serial port modem control register structure.
*/
#define SP_MODEM_DTR 0x01
#define SP_MODEM_RTS 0x02
#define SP_MODEM_IRQ 0x08
#define SP_MODEM_LOOP 0x10
#define SP_MODEM_DIV4 0x80
/*
* Define serial port line status register structure.
*/
#define SP_LSR_RDY 0x01
#define SP_LSR_EOVRUN 0x02
#define SP_LSR_EPAR 0x04
#define SP_LSR_EFRAME 0x08
#define SP_LSR_BREAK 0x10
#define SP_LSR_THOLD 0x20
#define SP_LSR_TX 0x40
#define SP_LSR_EFIFO 0x80
typedef struct {
uint8_t ucModemCtrl;
int transmitFifoChars;
} ns16550_context;
/*
* Driver functions
*/
NS16550_STATIC void ns16550_init(int minor);
NS16550_STATIC int ns16550_open(
int major,
int minor,
void * arg
);
NS16550_STATIC int ns16550_close(
int major,
int minor,
void * arg
);
NS16550_STATIC void ns16550_write_polled(
int minor,
char cChar
);
NS16550_STATIC int ns16550_assert_RTS(
int minor
);
NS16550_STATIC int ns16550_negate_RTS(
int minor
);
NS16550_STATIC int ns16550_assert_DTR(
int minor
);
NS16550_STATIC int ns16550_negate_DTR(
int minor
);
NS16550_STATIC void ns16550_initialize_interrupts(int minor);
NS16550_STATIC void ns16550_cleanup_interrupts(int minor);
NS16550_STATIC ssize_t ns16550_write_support_int(
int minor,
const char *buf,
size_t len
);
NS16550_STATIC ssize_t ns16550_write_support_polled(
int minor,
const char *buf,
size_t len
);
NS16550_STATIC int ns16550_inbyte_nonblocking_polled(
int minor
);
NS16550_STATIC void ns16550_enable_interrupts(
console_tbl *c,
int mask
);
NS16550_STATIC int ns16550_set_attributes(
int minor,
const struct termios *t
);
#ifdef __cplusplus
}
#endif
#endif /* _NS16550_P_H_ */
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