RTEMS: bsps/include/libchip/ns16550.h Source File

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ns16550.h
Go to the documentation of this file.
1
6/*
7 * COPYRIGHT (c) 1998 by Radstone Technology
8 *
9 * THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY
10 * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
11 * IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK
12 * AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU.
13 *
14 * You are hereby granted permission to use, copy, modify, and distribute
15 * this file, provided that this notice, plus the above copyright notice
16 * and disclaimer, appears in all copies. Radstone Technology will provide
17 * no support for this code.
18 *
19 * COPYRIGHT (c) 1989-2012.
20 * On-Line Applications Research Corporation (OAR).
21 *
22 * The license and distribution terms for this file may be
23 * found in the file LICENSE in this distribution or at
24 * http://www.rtems.org/license/LICENSE.
25 */
26
27#ifndef _NS16550_H_
28#define _NS16550_H_
29
30#include <rtems/termiostypes.h>
31#include <libchip/serial.h>
32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
37/*
38 * Driver function table
39 */
40
41extern const console_fns ns16550_fns;
42extern const console_fns ns16550_fns_polled;
43
44/*
45 * Flow control function tables
46 */
47
48extern const console_flow ns16550_flow_RTSCTS;
49extern const console_flow ns16550_flow_DTRCTS;
50
51/*
52 * Helpers for printk
53 */
54void ns16550_outch_polled(console_tbl *c, char out);
55int ns16550_inch_polled(console_tbl *c);
56
57/* Alternative NS16550 driver using the Termios device context */
58
59typedef uint8_t (*ns16550_get_reg)(uintptr_t port, uint8_t reg);
60
61typedef void (*ns16550_set_reg)(uintptr_t port, uint8_t reg, uint8_t value);
62
63typedef struct ns16550_context ns16550_context;
64
65typedef uint32_t (*ns16550_calculate_baud_divisor)(ns16550_context *ctx, uint32_t baud);
66
67 struct ns16550_context{
68 rtems_termios_device_context base;
69 ns16550_get_reg get_reg;
70 ns16550_set_reg set_reg;
71 uintptr_t port;
72 rtems_vector_number irq;
73 uint32_t clock;
74 uint32_t initial_baud;
75 bool has_fractional_divider_register;
76 bool has_precision_clock_synthesizer;
77 uint8_t modem_control;
78 uint8_t line_control;
79 uint32_t baud_divisor;
80 size_t out_total;
81 size_t out_remaining;
82 size_t out_current;
83 const char *out_buf;
84 rtems_termios_tty *tty;
85 ns16550_calculate_baud_divisor calculate_baud_divisor;
86};
87
88extern const rtems_termios_device_handler ns16550_handler_interrupt;
89extern const rtems_termios_device_handler ns16550_handler_polled;
90extern const rtems_termios_device_handler ns16550_handler_task;
91
92extern const rtems_termios_device_flow ns16550_flow_rtscts;
93extern const rtems_termios_device_flow ns16550_flow_dtrcts;
94
95void ns16550_polled_putchar(rtems_termios_device_context *base, char out);
96
97int ns16550_polled_getchar(rtems_termios_device_context *base);
98
99bool ns16550_probe(rtems_termios_device_context *base);
100
101#ifdef __cplusplus
102}
103#endif
104
105#endif /* _NS16550_H_ */
rtems_vector_number
ISR_Vector_number rtems_vector_number
Control block type used to manage the vectors.
Definition: intr.h:47
ns16550_outch_polled
void ns16550_outch_polled(console_tbl *c, char out)
Polled write for NS16550.
Definition: ns16550.c:348
ns16550_polled_putchar
void ns16550_polled_putchar(rtems_termios_device_context *base, char out)
Polled write for NS16550.
Definition: ns16550-context.c:500
serial.h
The generic libchip serial driver interface.
_console_flow
Definition: serial.h:94
_console_fns
Definition: serial.h:76
_console_tbl
Definition: serial.h:117
ns16550_context
Definition: ns16550.h:67
rtems_termios_device_context
Termios device context.
Definition: termiostypes.h:75
rtems_termios_device_flow
Termios device flow control handler.
Definition: termiostypes.h:248
rtems_termios_device_handler
Termios device handler.
Definition: termiostypes.h:141
rtems_termios_tty
Definition: termiostypes.h:283
termiostypes.h