forked from Imagelibrary/rtems
a7cd4b737c
Set the FIFO control register while DLAB == 1 in the line control register. At least on the QorIQ T4240 the driver still works with the re-ordered FIFO control register access.
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/**
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* @file
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*
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*/
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/*
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* COPYRIGHT (c) 1998 by Radstone Technology
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*
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* THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY
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* KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK
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* AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU.
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*
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* You are hereby granted permission to use, copy, modify, and distribute
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* this file, provided that this notice, plus the above copyright notice
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* and disclaimer, appears in all copies. Radstone Technology will provide
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* no support for this code.
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*
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* COPYRIGHT (c) 1989-2012.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef _NS16550_H_
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#define _NS16550_H_
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#include <rtems/termiostypes.h>
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#include <libchip/serial.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Driver function table
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*/
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extern const console_fns ns16550_fns;
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extern const console_fns ns16550_fns_polled;
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/*
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* Flow control function tables
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*/
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extern const console_flow ns16550_flow_RTSCTS;
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extern const console_flow ns16550_flow_DTRCTS;
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/*
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* Helpers for printk
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*/
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void ns16550_outch_polled(console_tbl *c, char out);
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int ns16550_inch_polled(console_tbl *c);
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/* Alternative NS16550 driver using the Termios device context */
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typedef uint8_t (*ns16550_get_reg)(uintptr_t port, uint8_t reg);
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typedef void (*ns16550_set_reg)(uintptr_t port, uint8_t reg, uint8_t value);
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typedef struct {
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rtems_termios_device_context base;
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ns16550_get_reg get_reg;
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ns16550_set_reg set_reg;
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uintptr_t port;
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rtems_vector_number irq;
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uint32_t clock;
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uint32_t initial_baud;
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bool has_fractional_divider_register;
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bool has_precision_clock_synthesizer;
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uint8_t modem_control;
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uint8_t line_control;
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uint32_t baud_divisor;
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size_t out_total;
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size_t out_remaining;
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size_t out_current;
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const char *out_buf;
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rtems_termios_tty *tty;
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} ns16550_context;
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extern const rtems_termios_device_handler ns16550_handler_interrupt;
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extern const rtems_termios_device_handler ns16550_handler_polled;
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extern const rtems_termios_device_handler ns16550_handler_task;
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extern const rtems_termios_device_flow ns16550_flow_rtscts;
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extern const rtems_termios_device_flow ns16550_flow_dtrcts;
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void ns16550_polled_putchar(rtems_termios_device_context *base, char out);
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int ns16550_polled_getchar(rtems_termios_device_context *base);
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bool ns16550_probe(rtems_termios_device_context *base);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _NS16550_H_ */
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