1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/**
* @file rtems/termiostypes.h
*
* RTEMS termios device support internal data structures
*/
/*
* COPYRIGHT (c) 1989-2011.
* 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.
*/
#ifndef __TERMIOSTYPES_H
#define __TERMIOSTYPES_H
#include <rtems.h>
#include <rtems/libio.h>
#include <rtems/assoc.h>
#include <stdint.h>
#include <termios.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup TermiostypesSupport RTEMS Termios Device Support
*
* @ingroup libcsupport
*
* @brief RTEMS Termios Device Support Internal Data Structures
*/
/*
* Wakeup callback data structure
*/
struct ttywakeup {
void (*sw_pfn)(struct termios *tty, void *arg);
void *sw_arg;
};
/*
* Variables associated with the character buffer
*/
struct rtems_termios_rawbuf {
char *theBuf;
volatile unsigned int Head;
volatile unsigned int Tail;
volatile unsigned int Size;
rtems_id Semaphore;
};
/*
* Variables associated with each termios instance.
* One structure for each hardware I/O device.
*/
struct rtems_termios_tty {
/*
* Linked-list of active TERMIOS devices
*/
struct rtems_termios_tty *forw;
struct rtems_termios_tty *back;
/*
* How many times has this device been opened
*/
int refcount;
/*
* This device
*/
rtems_device_major_number major;
rtems_device_minor_number minor;
/*
* Mutual-exclusion semaphores
*/
rtems_id isem;
rtems_id osem;
/*
* The canonical (cooked) character buffer
*/
char *cbuf;
int ccount;
int cindex;
/*
* Keep track of cursor (printhead) position
*/
int column;
int read_start_column;
/*
* The ioctl settings
*/
struct termios termios;
rtems_interval vtimeTicks;
/*
* Raw input character buffer
*/
struct rtems_termios_rawbuf rawInBuf;
uint32_t rawInBufSemaphoreOptions;
rtems_interval rawInBufSemaphoreTimeout;
rtems_interval rawInBufSemaphoreFirstTimeout;
unsigned int rawInBufDropped; /* Statistics */
/*
* Raw output character buffer
*/
struct rtems_termios_rawbuf rawOutBuf;
int t_dqlen; /* count of characters dequeued from device */
enum {rob_idle, rob_busy, rob_wait } rawOutBufState;
/*
* Callbacks to device-specific routines
*/
rtems_termios_callbacks device;
volatile unsigned int flow_ctrl;
unsigned int lowwater,highwater;
/*
* I/O task IDs (for task-driven drivers)
*/
rtems_id rxTaskId;
rtems_id txTaskId;
/*
* line discipline related stuff
*/
int t_line; /* id of line discipline */
void *t_sc; /* hook for discipline-specific data structure */
/*
* Wakeup callback variables
*/
struct ttywakeup tty_snd;
struct ttywakeup tty_rcv;
int tty_rcvwakeup;
rtems_interrupt_lock interrupt_lock;
};
struct rtems_termios_linesw {
int (*l_open) (struct rtems_termios_tty *tp);
int (*l_close)(struct rtems_termios_tty *tp);
int (*l_read )(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args);
int (*l_write)(struct rtems_termios_tty *tp,rtems_libio_rw_args_t *args);
int (*l_rint )(int c,struct rtems_termios_tty *tp);
int (*l_start)(struct rtems_termios_tty *tp);
int (*l_ioctl)(struct rtems_termios_tty *tp,rtems_libio_ioctl_args_t *args);
int (*l_modem)(struct rtems_termios_tty *tp,int flags);
};
/*
* FIXME: this should move to libio.h!
* values for rtems_termios_callbacks.outputUsesInterrupts
*/
#define TERMIOS_POLLED 0
#define TERMIOS_IRQ_DRIVEN 1
#define TERMIOS_TASK_DRIVEN 2
/*
* FIXME: this should move to termios.h!
*/
void rtems_termios_rxirq_occured(struct rtems_termios_tty *tty);
/*
* FIXME: this should move to termios.h!
* put a string to output ring buffer
*/
void rtems_termios_puts (
const void *buf,
size_t len,
struct rtems_termios_tty *tty
);
/*
* global hooks for line disciplines
*/
extern struct rtems_termios_linesw rtems_termios_linesw[];
extern int rtems_termios_nlinesw;
#define TTYDISC 0 /* termios tty line discipline */
#define TABLDISC 3 /* tablet discipline */
#define SLIPDISC 4 /* serial IP discipline */
#define PPPDISC 5 /* PPP discipline */
#define MAXLDISC 8
/* baudrate xxx integer type */
typedef uint32_t rtems_termios_baud_t;
/**
* @brief RTEMS Termios Baud Table
*/
extern const rtems_assoc_t rtems_termios_baud_table [];
/**
* @brief Converts the Integral Baud value @a baud to the Termios Control Flag
* Representation
*
* @retval B0 Invalid baud value or a baud value of 0.
* @retval other Baud constant according to @a baud.
*/
tcflag_t rtems_termios_number_to_baud(rtems_termios_baud_t baud);
/**
* @brief Convert Baud Part of Termios control flags to an integral Baud Value
*
* There is no need to mask the @a c_cflag with @c CBAUD.
*
* @retval 0 Invalid baud value or a baud value of @c B0.
* @retval other Integral baud value.
*/
rtems_termios_baud_t rtems_termios_baud_to_number(tcflag_t c_cflag);
/**
* @brief Convert Bxxx Constant to Index
*/
int rtems_termios_baud_to_index(rtems_termios_baud_t termios_baud);
/**
* @brief Sets the initial @a baud in the Termios context @a tty.
*
* @retval 0 Successful operation.
* @retval -1 Invalid baud value.
*/
int rtems_termios_set_initial_baud(
struct rtems_termios_tty *tty,
rtems_termios_baud_t baud
);
#define rtems_termios_interrupt_lock_acquire(tty, level) \
rtems_interrupt_lock_acquire(&tty->interrupt_lock, level)
#define rtems_termios_interrupt_lock_release(tty, level) \
rtems_interrupt_lock_release(&tty->interrupt_lock, level)
#ifdef __cplusplus
}
#endif
#endif /* TERMIOSTYPES_H */
|
