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/*
* Generic UART Serial driver for Motorola Coldfire processors definitions
*
* Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russian Fed.
* Author: Victor V. Vengerov <vvv@oktet.ru>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef __MCFUART_H__
#define __MCFUART_H__
#include <termios.h>
#include "bsp.h"
#include "mcf5206e.h"
/*
* The MCF5206e System Clock Frequency; 54MHz default
*/
#ifndef SYSTEM_CLOCK_FREQUENCY
#define SYSTEM_CLOCK_FREQUENCY BSP_SYSTEM_FREQUENCY
#endif
/*
* The following structure is a descriptor of single UART channel.
* It contains the initialization information about channel and
* current operating values
*/
typedef struct mcfuart {
uint32_t chn; /* UART channel number */
uint8_t intvec; /* UART interrupt vector number, or
0 if polled I/O */
void *tty; /* termios channel descriptor */
volatile const uint8_t *tx_buf; /* Transmit buffer from termios */
volatile uint32_t tx_buf_len; /* Transmit buffer length */
volatile uint32_t tx_ptr; /* Index of next char to transmit*/
rtems_isr_entry old_handler; /* Saved interrupt handler */
tcflag_t c_iflag; /* termios input mode flags */
bool parerr_mark_flag; /* Parity error processing
state */
} mcfuart;
/* mcfuart_init --
* This function verifies the input parameters and perform initialization
* of the Motorola Coldfire on-chip UART descriptor structure.
*
*/
rtems_status_code
mcfuart_init(mcfuart *uart, void *tty, uint8_t intvec,
uint32_t chn);
/* mcfuart_reset --
* This function perform the hardware initialization of Motorola
* Coldfire processor on-chip UART controller using parameters
* filled by the mcfuart_init function.
*/
rtems_status_code
mcfuart_reset(mcfuart *uart);
/* mcfuart_disable --
* This function disable the operations on Motorola Coldfire UART
* controller
*/
rtems_status_code
mcfuart_disable(mcfuart *uart);
/* mcfuart_set_attributes --
* This function parse the termios attributes structure and perform
* the appropriate settings in hardware.
*/
int
mcfuart_set_attributes(mcfuart *mcf, const struct termios *t);
/* mcfuart_poll_read --
* This function tried to read character from MCF UART and perform
* error handling.
*/
int
mcfuart_poll_read(mcfuart *uart);
/* mcfuart_interrupt_write --
* This function initiate transmitting of the buffer in interrupt mode.
*/
ssize_t
mcfuart_interrupt_write(mcfuart *uart, const char *buf, size_t len);
/* mcfuart_poll_write --
* This function transmit buffer byte-by-byte in polling mode.
*/
ssize_t
mcfuart_poll_write(mcfuart *uart, const char *buf, size_t len);
/* mcfuart_stop_remote_tx --
* This function stop data flow from remote device.
*/
int
mcfuart_stop_remote_tx(mcfuart *uart);
/* mcfuart_start_remote_tx --
* This function resume data flow from remote device.
*/
int
mcfuart_start_remote_tx(mcfuart *uart);
#endif
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