| 1 |
1026 |
ivang |
/*
|
| 2 |
|
|
* TERMIOS serial line support
|
| 3 |
|
|
*
|
| 4 |
|
|
* Author:
|
| 5 |
|
|
* W. Eric Norum
|
| 6 |
|
|
* Saskatchewan Accelerator Laboratory
|
| 7 |
|
|
* University of Saskatchewan
|
| 8 |
|
|
* Saskatoon, Saskatchewan, CANADA
|
| 9 |
|
|
* eric@skatter.usask.ca
|
| 10 |
|
|
*
|
| 11 |
|
|
* The license and distribution terms for this file may be
|
| 12 |
|
|
* found in the file LICENSE in this distribution or at
|
| 13 |
|
|
* http://www.OARcorp.com/rtems/license.html.
|
| 14 |
|
|
*
|
| 15 |
|
|
* termios.c,v 1.38 2002/01/31 21:42:36 joel Exp
|
| 16 |
|
|
*/
|
| 17 |
|
|
|
| 18 |
|
|
#if HAVE_CONFIG_H
|
| 19 |
|
|
#include "config.h"
|
| 20 |
|
|
#endif
|
| 21 |
|
|
|
| 22 |
|
|
#include <rtems.h>
|
| 23 |
|
|
#include <rtems/libio.h>
|
| 24 |
|
|
#include <ctype.h>
|
| 25 |
|
|
#include <errno.h>
|
| 26 |
|
|
#include <stdio.h>
|
| 27 |
|
|
#include <stdlib.h>
|
| 28 |
|
|
#include <termios.h>
|
| 29 |
|
|
#include <unistd.h>
|
| 30 |
|
|
#include <sys/ttycom.h>
|
| 31 |
|
|
|
| 32 |
|
|
#include <rtems/termiostypes.h>
|
| 33 |
|
|
|
| 34 |
|
|
/*
|
| 35 |
|
|
* FreeBSD does not support a full POSIX termios so we have to help it out
|
| 36 |
|
|
*/
|
| 37 |
|
|
|
| 38 |
|
|
#if defined(__FreeBSD__)
|
| 39 |
|
|
#define XTABS 0
|
| 40 |
|
|
#define ONLRET 0
|
| 41 |
|
|
#define ONOCR 0
|
| 42 |
|
|
#define TABDLY 0
|
| 43 |
|
|
#define OLCUC 0
|
| 44 |
|
|
#define ILCUC 0
|
| 45 |
|
|
#define OCRNL 0
|
| 46 |
|
|
#define IUCLC 0
|
| 47 |
|
|
#endif
|
| 48 |
|
|
|
| 49 |
|
|
/*
|
| 50 |
|
|
* Cygwin does not define these
|
| 51 |
|
|
*/
|
| 52 |
|
|
|
| 53 |
|
|
#if defined(__CYGWIN__)
|
| 54 |
|
|
#define ECHOPRT 0
|
| 55 |
|
|
#endif
|
| 56 |
|
|
|
| 57 |
|
|
/*
|
| 58 |
|
|
* The size of the cooked buffer
|
| 59 |
|
|
*/
|
| 60 |
|
|
#define CBUFSIZE 256
|
| 61 |
|
|
|
| 62 |
|
|
/*
|
| 63 |
|
|
* The sizes of the raw message buffers.
|
| 64 |
|
|
* On most architectures it is quite a bit more
|
| 65 |
|
|
* efficient if these are powers of two.
|
| 66 |
|
|
*/
|
| 67 |
|
|
#define RAW_INPUT_BUFFER_SIZE 128
|
| 68 |
|
|
#define RAW_OUTPUT_BUFFER_SIZE 64
|
| 69 |
|
|
|
| 70 |
|
|
/* fields for "flow_ctrl" status */
|
| 71 |
|
|
#define FL_IREQXOF 1 /* input queue requests stop of incoming data */
|
| 72 |
|
|
#define FL_ISNTXOF 2 /* XOFF has been sent to other side of line */
|
| 73 |
|
|
#define FL_IRTSOFF 4 /* RTS has been turned off for other side.. */
|
| 74 |
|
|
|
| 75 |
|
|
#define FL_ORCVXOF 0x10 /* XOFF has been received */
|
| 76 |
|
|
#define FL_OSTOP 0x20 /* output has been stopped due to XOFF */
|
| 77 |
|
|
|
| 78 |
|
|
#define FL_MDRTS 0x100 /* input controlled with RTS/CTS handshake */
|
| 79 |
|
|
#define FL_MDXON 0x200 /* input controlled with XON/XOFF protocol */
|
| 80 |
|
|
#define FL_MDXOF 0x400 /* output controlled with XON/XOFF protocol */
|
| 81 |
|
|
|
| 82 |
|
|
#define NODISC(n) \
|
| 83 |
|
|
{ NULL, NULL, NULL, NULL, \
|
| 84 |
|
|
NULL, NULL, NULL, NULL }
|
| 85 |
|
|
/*
|
| 86 |
|
|
* FIXME: change linesw entries consistant with linesw entry usage...
|
| 87 |
|
|
*/
|
| 88 |
|
|
struct linesw linesw[MAXLDISC] =
|
| 89 |
|
|
{
|
| 90 |
|
|
NODISC(0), /* 0- termios-built-in */
|
| 91 |
|
|
NODISC(1), /* 1- defunct */
|
| 92 |
|
|
NODISC(2), /* 2- NTTYDISC */
|
| 93 |
|
|
NODISC(3), /* TABLDISC */
|
| 94 |
|
|
NODISC(4), /* SLIPDISC */
|
| 95 |
|
|
NODISC(5), /* PPPDISC */
|
| 96 |
|
|
NODISC(6), /* loadable */
|
| 97 |
|
|
NODISC(7), /* loadable */
|
| 98 |
|
|
};
|
| 99 |
|
|
|
| 100 |
|
|
int nlinesw = sizeof (linesw) / sizeof (linesw[0]);
|
| 101 |
|
|
|
| 102 |
|
|
extern struct rtems_termios_tty *rtems_termios_ttyHead;
|
| 103 |
|
|
extern struct rtems_termios_tty *rtems_termios_ttyTail;
|
| 104 |
|
|
extern rtems_id rtems_termios_ttyMutex;
|
| 105 |
|
|
|
| 106 |
|
|
static rtems_task rtems_termios_rxdaemon(rtems_task_argument argument);
|
| 107 |
|
|
static rtems_task rtems_termios_txdaemon(rtems_task_argument argument);
|
| 108 |
|
|
/*
|
| 109 |
|
|
* some constants for I/O daemon task creation
|
| 110 |
|
|
*/
|
| 111 |
|
|
#define TERMIOS_TXTASK_PRIO 10
|
| 112 |
|
|
#define TERMIOS_RXTASK_PRIO 9
|
| 113 |
|
|
#define TERMIOS_TXTASK_STACKSIZE 1024
|
| 114 |
|
|
#define TERMIOS_RXTASK_STACKSIZE 1024
|
| 115 |
|
|
/*
|
| 116 |
|
|
* some events to be sent to the I/O tasks
|
| 117 |
|
|
*/
|
| 118 |
|
|
#define TERMIOS_TX_START_EVENT RTEMS_EVENT_1
|
| 119 |
|
|
#define TERMIOS_TX_TERMINATE_EVENT RTEMS_EVENT_0
|
| 120 |
|
|
|
| 121 |
|
|
#define TERMIOS_RX_PROC_EVENT RTEMS_EVENT_1
|
| 122 |
|
|
#define TERMIOS_RX_TERMINATE_EVENT RTEMS_EVENT_0
|
| 123 |
|
|
|
| 124 |
|
|
/*
|
| 125 |
|
|
* Open a termios device
|
| 126 |
|
|
*/
|
| 127 |
|
|
rtems_status_code
|
| 128 |
|
|
rtems_termios_open (
|
| 129 |
|
|
rtems_device_major_number major,
|
| 130 |
|
|
rtems_device_minor_number minor,
|
| 131 |
|
|
void *arg,
|
| 132 |
|
|
const rtems_termios_callbacks *callbacks
|
| 133 |
|
|
)
|
| 134 |
|
|
{
|
| 135 |
|
|
rtems_status_code sc;
|
| 136 |
|
|
rtems_libio_open_close_args_t *args = arg;
|
| 137 |
|
|
struct rtems_termios_tty *tty;
|
| 138 |
|
|
|
| 139 |
|
|
/*
|
| 140 |
|
|
* See if the device has already been opened
|
| 141 |
|
|
*/
|
| 142 |
|
|
sc = rtems_semaphore_obtain (rtems_termios_ttyMutex,
|
| 143 |
|
|
RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 144 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 145 |
|
|
return sc;
|
| 146 |
|
|
for (tty = rtems_termios_ttyHead ; tty != NULL ; tty = tty->forw) {
|
| 147 |
|
|
if ((tty->major == major) && (tty->minor == minor))
|
| 148 |
|
|
break;
|
| 149 |
|
|
}
|
| 150 |
|
|
if (tty == NULL) {
|
| 151 |
|
|
static char c = 'a';
|
| 152 |
|
|
|
| 153 |
|
|
/*
|
| 154 |
|
|
* Create a new device
|
| 155 |
|
|
*/
|
| 156 |
|
|
tty = calloc (1, sizeof (struct rtems_termios_tty));
|
| 157 |
|
|
if (tty == NULL) {
|
| 158 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 159 |
|
|
return RTEMS_NO_MEMORY;
|
| 160 |
|
|
}
|
| 161 |
|
|
/*
|
| 162 |
|
|
* allocate raw input buffer
|
| 163 |
|
|
*/
|
| 164 |
|
|
tty->rawInBuf.Size = RAW_INPUT_BUFFER_SIZE;
|
| 165 |
|
|
tty->rawInBuf.theBuf = malloc (tty->rawInBuf.Size);
|
| 166 |
|
|
if (tty->rawInBuf.theBuf == NULL) {
|
| 167 |
|
|
free(tty);
|
| 168 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 169 |
|
|
return RTEMS_NO_MEMORY;
|
| 170 |
|
|
}
|
| 171 |
|
|
/*
|
| 172 |
|
|
* allocate raw output buffer
|
| 173 |
|
|
*/
|
| 174 |
|
|
tty->rawOutBuf.Size = RAW_OUTPUT_BUFFER_SIZE;
|
| 175 |
|
|
tty->rawOutBuf.theBuf = malloc (tty->rawOutBuf.Size);
|
| 176 |
|
|
if (tty->rawInBuf.theBuf == NULL) {
|
| 177 |
|
|
free((void *)(tty->rawInBuf.theBuf));
|
| 178 |
|
|
free(tty);
|
| 179 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 180 |
|
|
return RTEMS_NO_MEMORY;
|
| 181 |
|
|
}
|
| 182 |
|
|
/*
|
| 183 |
|
|
* allocate cooked buffer
|
| 184 |
|
|
*/
|
| 185 |
|
|
tty->cbuf = malloc (CBUFSIZE);
|
| 186 |
|
|
if (tty->cbuf == NULL) {
|
| 187 |
|
|
free((void *)(tty->rawOutBuf.theBuf));
|
| 188 |
|
|
free((void *)(tty->rawInBuf.theBuf));
|
| 189 |
|
|
free(tty);
|
| 190 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 191 |
|
|
return RTEMS_NO_MEMORY;
|
| 192 |
|
|
}
|
| 193 |
|
|
/*
|
| 194 |
|
|
* Initialize wakeup callbacks
|
| 195 |
|
|
*/
|
| 196 |
|
|
tty->tty_snd.sw_pfn = NULL;
|
| 197 |
|
|
tty->tty_snd.sw_arg = NULL;
|
| 198 |
|
|
tty->tty_rcv.sw_pfn = NULL;
|
| 199 |
|
|
tty->tty_rcv.sw_arg = NULL;
|
| 200 |
|
|
tty->tty_rcvwakeup = 0;
|
| 201 |
|
|
|
| 202 |
|
|
/*
|
| 203 |
|
|
* link tty
|
| 204 |
|
|
*/
|
| 205 |
|
|
tty->forw = rtems_termios_ttyHead;
|
| 206 |
|
|
tty->back = NULL;
|
| 207 |
|
|
if (rtems_termios_ttyHead != NULL)
|
| 208 |
|
|
rtems_termios_ttyHead->back = tty;
|
| 209 |
|
|
rtems_termios_ttyHead = tty;
|
| 210 |
|
|
if (rtems_termios_ttyTail == NULL)
|
| 211 |
|
|
rtems_termios_ttyTail = tty;
|
| 212 |
|
|
|
| 213 |
|
|
tty->minor = minor;
|
| 214 |
|
|
tty->major = major;
|
| 215 |
|
|
|
| 216 |
|
|
/*
|
| 217 |
|
|
* Set up mutex semaphores
|
| 218 |
|
|
*/
|
| 219 |
|
|
sc = rtems_semaphore_create (
|
| 220 |
|
|
rtems_build_name ('T', 'R', 'i', c),
|
| 221 |
|
|
1,
|
| 222 |
|
|
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
|
| 223 |
|
|
RTEMS_NO_PRIORITY,
|
| 224 |
|
|
&tty->isem);
|
| 225 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 226 |
|
|
rtems_fatal_error_occurred (sc);
|
| 227 |
|
|
sc = rtems_semaphore_create (
|
| 228 |
|
|
rtems_build_name ('T', 'R', 'o', c),
|
| 229 |
|
|
1,
|
| 230 |
|
|
RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
|
| 231 |
|
|
RTEMS_NO_PRIORITY,
|
| 232 |
|
|
&tty->osem);
|
| 233 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 234 |
|
|
rtems_fatal_error_occurred (sc);
|
| 235 |
|
|
sc = rtems_semaphore_create (
|
| 236 |
|
|
rtems_build_name ('T', 'R', 'x', c),
|
| 237 |
|
|
0,
|
| 238 |
|
|
RTEMS_SIMPLE_BINARY_SEMAPHORE | RTEMS_FIFO,
|
| 239 |
|
|
RTEMS_NO_PRIORITY,
|
| 240 |
|
|
&tty->rawOutBuf.Semaphore);
|
| 241 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 242 |
|
|
rtems_fatal_error_occurred (sc);
|
| 243 |
|
|
tty->rawOutBufState = rob_idle;
|
| 244 |
|
|
|
| 245 |
|
|
/*
|
| 246 |
|
|
* Set callbacks
|
| 247 |
|
|
*/
|
| 248 |
|
|
tty->device = *callbacks;
|
| 249 |
|
|
|
| 250 |
|
|
/*
|
| 251 |
|
|
* Create I/O tasks
|
| 252 |
|
|
*/
|
| 253 |
|
|
if (tty->device.outputUsesInterrupts == TERMIOS_TASK_DRIVEN) {
|
| 254 |
|
|
sc = rtems_task_create (
|
| 255 |
|
|
rtems_build_name ('T', 'x', 'T', c),
|
| 256 |
|
|
TERMIOS_TXTASK_PRIO,
|
| 257 |
|
|
TERMIOS_TXTASK_STACKSIZE,
|
| 258 |
|
|
RTEMS_NO_PREEMPT | RTEMS_NO_TIMESLICE |
|
| 259 |
|
|
RTEMS_NO_ASR,
|
| 260 |
|
|
RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL,
|
| 261 |
|
|
&tty->txTaskId);
|
| 262 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 263 |
|
|
rtems_fatal_error_occurred (sc);
|
| 264 |
|
|
sc = rtems_task_create (
|
| 265 |
|
|
rtems_build_name ('R', 'x', 'T', c),
|
| 266 |
|
|
TERMIOS_RXTASK_PRIO,
|
| 267 |
|
|
TERMIOS_RXTASK_STACKSIZE,
|
| 268 |
|
|
RTEMS_NO_PREEMPT | RTEMS_NO_TIMESLICE |
|
| 269 |
|
|
RTEMS_NO_ASR,
|
| 270 |
|
|
RTEMS_NO_FLOATING_POINT | RTEMS_LOCAL,
|
| 271 |
|
|
&tty->rxTaskId);
|
| 272 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 273 |
|
|
rtems_fatal_error_occurred (sc);
|
| 274 |
|
|
|
| 275 |
|
|
}
|
| 276 |
|
|
if ((tty->device.pollRead == NULL) ||
|
| 277 |
|
|
(tty->device.outputUsesInterrupts == TERMIOS_TASK_DRIVEN)){
|
| 278 |
|
|
sc = rtems_semaphore_create (
|
| 279 |
|
|
rtems_build_name ('T', 'R', 'r', c),
|
| 280 |
|
|
0,
|
| 281 |
|
|
RTEMS_COUNTING_SEMAPHORE | RTEMS_PRIORITY,
|
| 282 |
|
|
RTEMS_NO_PRIORITY,
|
| 283 |
|
|
&tty->rawInBuf.Semaphore);
|
| 284 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 285 |
|
|
rtems_fatal_error_occurred (sc);
|
| 286 |
|
|
}
|
| 287 |
|
|
|
| 288 |
|
|
/*
|
| 289 |
|
|
* Set default parameters
|
| 290 |
|
|
*/
|
| 291 |
|
|
tty->termios.c_iflag = BRKINT | ICRNL | IXON | IMAXBEL;
|
| 292 |
|
|
tty->termios.c_oflag = OPOST | ONLCR | XTABS;
|
| 293 |
|
|
tty->termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL;
|
| 294 |
|
|
tty->termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOK | ECHOE | ECHOCTL;
|
| 295 |
|
|
|
| 296 |
|
|
tty->termios.c_cc[VINTR] = '\003';
|
| 297 |
|
|
tty->termios.c_cc[VQUIT] = '\034';
|
| 298 |
|
|
tty->termios.c_cc[VERASE] = '\177';
|
| 299 |
|
|
tty->termios.c_cc[VKILL] = '\025';
|
| 300 |
|
|
tty->termios.c_cc[VEOF] = '\004';
|
| 301 |
|
|
tty->termios.c_cc[VEOL] = '\000';
|
| 302 |
|
|
tty->termios.c_cc[VEOL2] = '\000';
|
| 303 |
|
|
tty->termios.c_cc[VSTART] = '\021';
|
| 304 |
|
|
tty->termios.c_cc[VSTOP] = '\023';
|
| 305 |
|
|
tty->termios.c_cc[VSUSP] = '\032';
|
| 306 |
|
|
tty->termios.c_cc[VREPRINT] = '\022';
|
| 307 |
|
|
tty->termios.c_cc[VDISCARD] = '\017';
|
| 308 |
|
|
tty->termios.c_cc[VWERASE] = '\027';
|
| 309 |
|
|
tty->termios.c_cc[VLNEXT] = '\026';
|
| 310 |
|
|
|
| 311 |
|
|
/* start with no flow control, clear flow control flags */
|
| 312 |
|
|
tty->flow_ctrl = 0;
|
| 313 |
|
|
/*
|
| 314 |
|
|
* set low/highwater mark for XON/XOFF support
|
| 315 |
|
|
*/
|
| 316 |
|
|
tty->lowwater = tty->rawInBuf.Size * 1/2;
|
| 317 |
|
|
tty->highwater = tty->rawInBuf.Size * 3/4;
|
| 318 |
|
|
/*
|
| 319 |
|
|
* Bump name characer
|
| 320 |
|
|
*/
|
| 321 |
|
|
if (c++ == 'z')
|
| 322 |
|
|
c = 'a';
|
| 323 |
|
|
|
| 324 |
|
|
}
|
| 325 |
|
|
args->iop->data1 = tty;
|
| 326 |
|
|
if (!tty->refcount++) {
|
| 327 |
|
|
if (tty->device.firstOpen)
|
| 328 |
|
|
(*tty->device.firstOpen)(major, minor, arg);
|
| 329 |
|
|
/*
|
| 330 |
|
|
* start I/O tasks, if needed
|
| 331 |
|
|
*/
|
| 332 |
|
|
if (tty->device.outputUsesInterrupts == TERMIOS_TASK_DRIVEN) {
|
| 333 |
|
|
sc = rtems_task_start(tty->rxTaskId,
|
| 334 |
|
|
rtems_termios_rxdaemon,
|
| 335 |
|
|
(rtems_task_argument)tty);
|
| 336 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 337 |
|
|
rtems_fatal_error_occurred (sc);
|
| 338 |
|
|
|
| 339 |
|
|
sc = rtems_task_start(tty->txTaskId,
|
| 340 |
|
|
rtems_termios_txdaemon,
|
| 341 |
|
|
(rtems_task_argument)tty);
|
| 342 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 343 |
|
|
rtems_fatal_error_occurred (sc);
|
| 344 |
|
|
}
|
| 345 |
|
|
}
|
| 346 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 347 |
|
|
return RTEMS_SUCCESSFUL;
|
| 348 |
|
|
}
|
| 349 |
|
|
|
| 350 |
|
|
/*
|
| 351 |
|
|
* Drain output queue
|
| 352 |
|
|
*/
|
| 353 |
|
|
static void
|
| 354 |
|
|
drainOutput (struct rtems_termios_tty *tty)
|
| 355 |
|
|
{
|
| 356 |
|
|
rtems_interrupt_level level;
|
| 357 |
|
|
rtems_status_code sc;
|
| 358 |
|
|
|
| 359 |
|
|
if (tty->device.outputUsesInterrupts != TERMIOS_POLLED) {
|
| 360 |
|
|
rtems_interrupt_disable (level);
|
| 361 |
|
|
while (tty->rawOutBuf.Tail != tty->rawOutBuf.Head) {
|
| 362 |
|
|
tty->rawOutBufState = rob_wait;
|
| 363 |
|
|
rtems_interrupt_enable (level);
|
| 364 |
|
|
sc = rtems_semaphore_obtain (tty->rawOutBuf.Semaphore,
|
| 365 |
|
|
RTEMS_WAIT,
|
| 366 |
|
|
RTEMS_NO_TIMEOUT);
|
| 367 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 368 |
|
|
rtems_fatal_error_occurred (sc);
|
| 369 |
|
|
rtems_interrupt_disable (level);
|
| 370 |
|
|
}
|
| 371 |
|
|
rtems_interrupt_enable (level);
|
| 372 |
|
|
}
|
| 373 |
|
|
}
|
| 374 |
|
|
|
| 375 |
|
|
rtems_status_code
|
| 376 |
|
|
rtems_termios_close (void *arg)
|
| 377 |
|
|
{
|
| 378 |
|
|
rtems_libio_open_close_args_t *args = arg;
|
| 379 |
|
|
struct rtems_termios_tty *tty = args->iop->data1;
|
| 380 |
|
|
rtems_status_code sc;
|
| 381 |
|
|
|
| 382 |
|
|
sc = rtems_semaphore_obtain (rtems_termios_ttyMutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 383 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 384 |
|
|
rtems_fatal_error_occurred (sc);
|
| 385 |
|
|
if (--tty->refcount == 0) {
|
| 386 |
|
|
if (linesw[tty->t_line].l_close != NULL) {
|
| 387 |
|
|
/*
|
| 388 |
|
|
* call discipline-specific close
|
| 389 |
|
|
*/
|
| 390 |
|
|
sc = linesw[tty->t_line].l_close(tty);
|
| 391 |
|
|
}
|
| 392 |
|
|
else {
|
| 393 |
|
|
/*
|
| 394 |
|
|
* default: just flush output buffer
|
| 395 |
|
|
*/
|
| 396 |
|
|
drainOutput (tty);
|
| 397 |
|
|
}
|
| 398 |
|
|
|
| 399 |
|
|
if (tty->device.outputUsesInterrupts
|
| 400 |
|
|
== TERMIOS_TASK_DRIVEN) {
|
| 401 |
|
|
/*
|
| 402 |
|
|
* send "terminate" to I/O tasks
|
| 403 |
|
|
*/
|
| 404 |
|
|
sc = rtems_event_send(
|
| 405 |
|
|
tty->rxTaskId,
|
| 406 |
|
|
TERMIOS_RX_TERMINATE_EVENT);
|
| 407 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 408 |
|
|
rtems_fatal_error_occurred (sc);
|
| 409 |
|
|
sc = rtems_event_send(
|
| 410 |
|
|
tty->txTaskId,
|
| 411 |
|
|
TERMIOS_TX_TERMINATE_EVENT);
|
| 412 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 413 |
|
|
rtems_fatal_error_occurred (sc);
|
| 414 |
|
|
}
|
| 415 |
|
|
if (tty->device.lastClose)
|
| 416 |
|
|
(*tty->device.lastClose)(tty->major, tty->minor, arg);
|
| 417 |
|
|
if (tty->forw == NULL) {
|
| 418 |
|
|
rtems_termios_ttyTail = tty->back;
|
| 419 |
|
|
if ( rtems_termios_ttyTail != NULL ) {
|
| 420 |
|
|
rtems_termios_ttyTail->forw = NULL;
|
| 421 |
|
|
}
|
| 422 |
|
|
}
|
| 423 |
|
|
else {
|
| 424 |
|
|
tty->forw->back = tty->back;
|
| 425 |
|
|
}
|
| 426 |
|
|
if (tty->back == NULL) {
|
| 427 |
|
|
rtems_termios_ttyHead = tty->forw;
|
| 428 |
|
|
if ( rtems_termios_ttyHead != NULL ) {
|
| 429 |
|
|
rtems_termios_ttyHead->back = NULL;
|
| 430 |
|
|
}
|
| 431 |
|
|
}
|
| 432 |
|
|
else {
|
| 433 |
|
|
tty->back->forw = tty->forw;
|
| 434 |
|
|
}
|
| 435 |
|
|
rtems_semaphore_delete (tty->isem);
|
| 436 |
|
|
rtems_semaphore_delete (tty->osem);
|
| 437 |
|
|
rtems_semaphore_delete (tty->rawOutBuf.Semaphore);
|
| 438 |
|
|
if ((tty->device.pollRead == NULL) ||
|
| 439 |
|
|
(tty->device.outputUsesInterrupts == TERMIOS_TASK_DRIVEN))
|
| 440 |
|
|
rtems_semaphore_delete (tty->rawInBuf.Semaphore);
|
| 441 |
|
|
free (tty->rawInBuf.theBuf);
|
| 442 |
|
|
free (tty->rawOutBuf.theBuf);
|
| 443 |
|
|
free (tty->cbuf);
|
| 444 |
|
|
free (tty);
|
| 445 |
|
|
}
|
| 446 |
|
|
rtems_semaphore_release (rtems_termios_ttyMutex);
|
| 447 |
|
|
return RTEMS_SUCCESSFUL;
|
| 448 |
|
|
}
|
| 449 |
|
|
|
| 450 |
|
|
static void
|
| 451 |
|
|
termios_set_flowctrl(struct rtems_termios_tty *tty)
|
| 452 |
|
|
{
|
| 453 |
|
|
rtems_interrupt_level level;
|
| 454 |
|
|
/*
|
| 455 |
|
|
* check for flow control options to be switched off
|
| 456 |
|
|
*/
|
| 457 |
|
|
|
| 458 |
|
|
/* check for outgoing XON/XOFF flow control switched off */
|
| 459 |
|
|
if (( tty->flow_ctrl & FL_MDXON) &&
|
| 460 |
|
|
!(tty->termios.c_iflag & IXON)) {
|
| 461 |
|
|
/* clear related flags in flow_ctrl */
|
| 462 |
|
|
tty->flow_ctrl &= ~(FL_MDXON | FL_ORCVXOF);
|
| 463 |
|
|
|
| 464 |
|
|
/* has output been stopped due to received XOFF? */
|
| 465 |
|
|
if (tty->flow_ctrl & FL_OSTOP) {
|
| 466 |
|
|
/* disable interrupts */
|
| 467 |
|
|
rtems_interrupt_disable(level);
|
| 468 |
|
|
tty->flow_ctrl &= ~FL_OSTOP;
|
| 469 |
|
|
/* check for chars in output buffer (or rob_state?) */
|
| 470 |
|
|
if (tty->rawOutBufState != rob_idle) {
|
| 471 |
|
|
/* if chars available, call write function... */
|
| 472 |
|
|
(*tty->device.write)(tty->minor,
|
| 473 |
|
|
(char *)&tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail],1);
|
| 474 |
|
|
}
|
| 475 |
|
|
/* reenable interrupts */
|
| 476 |
|
|
rtems_interrupt_enable(level);
|
| 477 |
|
|
}
|
| 478 |
|
|
}
|
| 479 |
|
|
/* check for incoming XON/XOFF flow control switched off */
|
| 480 |
|
|
if (( tty->flow_ctrl & FL_MDXOF) &&
|
| 481 |
|
|
!(tty->termios.c_iflag & IXOFF)) {
|
| 482 |
|
|
/* clear related flags in flow_ctrl */
|
| 483 |
|
|
tty->flow_ctrl &= ~(FL_MDXOF);
|
| 484 |
|
|
/* FIXME: what happens, if we had sent XOFF but not yet XON? */
|
| 485 |
|
|
tty->flow_ctrl &= ~(FL_ISNTXOF);
|
| 486 |
|
|
}
|
| 487 |
|
|
|
| 488 |
|
|
/* check for incoming RTS/CTS flow control switched off */
|
| 489 |
|
|
if (( tty->flow_ctrl & FL_MDRTS) &&
|
| 490 |
|
|
!(tty->termios.c_cflag & CRTSCTS)) {
|
| 491 |
|
|
/* clear related flags in flow_ctrl */
|
| 492 |
|
|
tty->flow_ctrl &= ~(FL_MDRTS);
|
| 493 |
|
|
|
| 494 |
|
|
/* restart remote Tx, if it was stopped */
|
| 495 |
|
|
if ((tty->flow_ctrl & FL_IRTSOFF) &&
|
| 496 |
|
|
(tty->device.startRemoteTx != NULL)) {
|
| 497 |
|
|
tty->device.startRemoteTx(tty->minor);
|
| 498 |
|
|
}
|
| 499 |
|
|
tty->flow_ctrl &= ~(FL_IRTSOFF);
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
/*
|
| 503 |
|
|
* check for flow control options to be switched on
|
| 504 |
|
|
*/
|
| 505 |
|
|
/* check for incoming RTS/CTS flow control switched on */
|
| 506 |
|
|
if (tty->termios.c_cflag & CRTSCTS) {
|
| 507 |
|
|
tty->flow_ctrl |= FL_MDRTS;
|
| 508 |
|
|
}
|
| 509 |
|
|
/* check for incoming XON/XOF flow control switched on */
|
| 510 |
|
|
if (tty->termios.c_iflag & IXOFF) {
|
| 511 |
|
|
tty->flow_ctrl |= FL_MDXOF;
|
| 512 |
|
|
}
|
| 513 |
|
|
/* check for outgoing XON/XOF flow control switched on */
|
| 514 |
|
|
if (tty->termios.c_iflag & IXON) {
|
| 515 |
|
|
tty->flow_ctrl |= FL_MDXON;
|
| 516 |
|
|
}
|
| 517 |
|
|
}
|
| 518 |
|
|
|
| 519 |
|
|
rtems_status_code
|
| 520 |
|
|
rtems_termios_ioctl (void *arg)
|
| 521 |
|
|
{
|
| 522 |
|
|
rtems_libio_ioctl_args_t *args = arg;
|
| 523 |
|
|
struct rtems_termios_tty *tty = args->iop->data1;
|
| 524 |
|
|
struct ttywakeup *wakeup = (struct ttywakeup *)args->buffer;
|
| 525 |
|
|
rtems_status_code sc;
|
| 526 |
|
|
|
| 527 |
|
|
args->ioctl_return = 0;
|
| 528 |
|
|
sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 529 |
|
|
if (sc != RTEMS_SUCCESSFUL) {
|
| 530 |
|
|
args->ioctl_return = sc;
|
| 531 |
|
|
return sc;
|
| 532 |
|
|
}
|
| 533 |
|
|
switch (args->command) {
|
| 534 |
|
|
default:
|
| 535 |
|
|
if (linesw[tty->t_line].l_ioctl != NULL) {
|
| 536 |
|
|
sc = linesw[tty->t_line].l_ioctl(tty,args);
|
| 537 |
|
|
}
|
| 538 |
|
|
else {
|
| 539 |
|
|
sc = RTEMS_INVALID_NUMBER;
|
| 540 |
|
|
}
|
| 541 |
|
|
break;
|
| 542 |
|
|
|
| 543 |
|
|
case RTEMS_IO_GET_ATTRIBUTES:
|
| 544 |
|
|
*(struct termios *)args->buffer = tty->termios;
|
| 545 |
|
|
break;
|
| 546 |
|
|
|
| 547 |
|
|
case RTEMS_IO_SET_ATTRIBUTES:
|
| 548 |
|
|
tty->termios = *(struct termios *)args->buffer;
|
| 549 |
|
|
|
| 550 |
|
|
/* check for and process change in flow control options */
|
| 551 |
|
|
termios_set_flowctrl(tty);
|
| 552 |
|
|
|
| 553 |
|
|
if (tty->termios.c_lflag & ICANON) {
|
| 554 |
|
|
tty->rawInBufSemaphoreOptions = RTEMS_WAIT;
|
| 555 |
|
|
tty->rawInBufSemaphoreTimeout = RTEMS_NO_TIMEOUT;
|
| 556 |
|
|
tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT;
|
| 557 |
|
|
}
|
| 558 |
|
|
else {
|
| 559 |
|
|
rtems_interval ticksPerSecond;
|
| 560 |
|
|
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &ticksPerSecond);
|
| 561 |
|
|
tty->vtimeTicks = tty->termios.c_cc[VTIME] * ticksPerSecond / 10;
|
| 562 |
|
|
if (tty->termios.c_cc[VTIME]) {
|
| 563 |
|
|
tty->rawInBufSemaphoreOptions = RTEMS_WAIT;
|
| 564 |
|
|
tty->rawInBufSemaphoreTimeout = tty->vtimeTicks;
|
| 565 |
|
|
if (tty->termios.c_cc[VMIN])
|
| 566 |
|
|
tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT;
|
| 567 |
|
|
else
|
| 568 |
|
|
tty->rawInBufSemaphoreFirstTimeout = tty->vtimeTicks;
|
| 569 |
|
|
}
|
| 570 |
|
|
else {
|
| 571 |
|
|
if (tty->termios.c_cc[VMIN]) {
|
| 572 |
|
|
tty->rawInBufSemaphoreOptions = RTEMS_WAIT;
|
| 573 |
|
|
tty->rawInBufSemaphoreTimeout = RTEMS_NO_TIMEOUT;
|
| 574 |
|
|
tty->rawInBufSemaphoreFirstTimeout = RTEMS_NO_TIMEOUT;
|
| 575 |
|
|
}
|
| 576 |
|
|
else {
|
| 577 |
|
|
tty->rawInBufSemaphoreOptions = RTEMS_NO_WAIT;
|
| 578 |
|
|
}
|
| 579 |
|
|
}
|
| 580 |
|
|
}
|
| 581 |
|
|
if (tty->device.setAttributes)
|
| 582 |
|
|
(*tty->device.setAttributes)(tty->minor, &tty->termios);
|
| 583 |
|
|
break;
|
| 584 |
|
|
|
| 585 |
|
|
case RTEMS_IO_TCDRAIN:
|
| 586 |
|
|
drainOutput (tty);
|
| 587 |
|
|
break;
|
| 588 |
|
|
|
| 589 |
|
|
case RTEMS_IO_SNDWAKEUP:
|
| 590 |
|
|
tty->tty_snd = *wakeup;
|
| 591 |
|
|
break;
|
| 592 |
|
|
|
| 593 |
|
|
case RTEMS_IO_RCVWAKEUP:
|
| 594 |
|
|
tty->tty_rcv = *wakeup;
|
| 595 |
|
|
break;
|
| 596 |
|
|
|
| 597 |
|
|
/*
|
| 598 |
|
|
* FIXME: add various ioctl code handlers
|
| 599 |
|
|
*/
|
| 600 |
|
|
|
| 601 |
|
|
#if 1 /* FIXME */
|
| 602 |
|
|
case TIOCSETD:
|
| 603 |
|
|
/*
|
| 604 |
|
|
* close old line discipline
|
| 605 |
|
|
*/
|
| 606 |
|
|
if (linesw[tty->t_line].l_close != NULL) {
|
| 607 |
|
|
sc = linesw[tty->t_line].l_close(tty);
|
| 608 |
|
|
}
|
| 609 |
|
|
tty->t_line=*(int*)(args->buffer);
|
| 610 |
|
|
tty->t_sc = NULL; /* ensure that no more valid data */
|
| 611 |
|
|
/*
|
| 612 |
|
|
* open new line discipline
|
| 613 |
|
|
*/
|
| 614 |
|
|
if (linesw[tty->t_line].l_open != NULL) {
|
| 615 |
|
|
sc = linesw[tty->t_line].l_open(tty);
|
| 616 |
|
|
}
|
| 617 |
|
|
break;
|
| 618 |
|
|
case TIOCGETD:
|
| 619 |
|
|
*(int*)(args->buffer)=tty->t_line;
|
| 620 |
|
|
break;
|
| 621 |
|
|
#endif
|
| 622 |
|
|
case FIONREAD:
|
| 623 |
|
|
/* Half guess that this is the right operation */
|
| 624 |
|
|
*(int *)args->buffer = tty->ccount - tty->cindex;
|
| 625 |
|
|
break;
|
| 626 |
|
|
}
|
| 627 |
|
|
rtems_semaphore_release (tty->osem);
|
| 628 |
|
|
args->ioctl_return = sc;
|
| 629 |
|
|
return sc;
|
| 630 |
|
|
}
|
| 631 |
|
|
|
| 632 |
|
|
/*
|
| 633 |
|
|
* Send characters to device-specific code
|
| 634 |
|
|
*/
|
| 635 |
|
|
void
|
| 636 |
|
|
rtems_termios_puts (const char *buf, int len, struct rtems_termios_tty *tty)
|
| 637 |
|
|
{
|
| 638 |
|
|
unsigned int newHead;
|
| 639 |
|
|
rtems_interrupt_level level;
|
| 640 |
|
|
rtems_status_code sc;
|
| 641 |
|
|
|
| 642 |
|
|
if (tty->device.outputUsesInterrupts == TERMIOS_POLLED) {
|
| 643 |
|
|
(*tty->device.write)(tty->minor, buf, len);
|
| 644 |
|
|
return;
|
| 645 |
|
|
}
|
| 646 |
|
|
newHead = tty->rawOutBuf.Head;
|
| 647 |
|
|
while (len) {
|
| 648 |
|
|
/*
|
| 649 |
|
|
* Performance improvement could be made here.
|
| 650 |
|
|
* Copy multiple bytes to raw buffer:
|
| 651 |
|
|
* if (len > 1) && (space to buffer end, or tail > 1)
|
| 652 |
|
|
* ncopy = MIN (len, space to buffer end or tail)
|
| 653 |
|
|
* memcpy (raw buffer, buf, ncopy)
|
| 654 |
|
|
* buf += ncopy
|
| 655 |
|
|
* len -= ncopy
|
| 656 |
|
|
*
|
| 657 |
|
|
* To minimize latency, the memcpy should be done
|
| 658 |
|
|
* with interrupts enabled.
|
| 659 |
|
|
*/
|
| 660 |
|
|
newHead = (newHead + 1) % tty->rawOutBuf.Size;
|
| 661 |
|
|
rtems_interrupt_disable (level);
|
| 662 |
|
|
while (newHead == tty->rawOutBuf.Tail) {
|
| 663 |
|
|
tty->rawOutBufState = rob_wait;
|
| 664 |
|
|
rtems_interrupt_enable (level);
|
| 665 |
|
|
sc = rtems_semaphore_obtain (tty->rawOutBuf.Semaphore,
|
| 666 |
|
|
RTEMS_WAIT,
|
| 667 |
|
|
RTEMS_NO_TIMEOUT);
|
| 668 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 669 |
|
|
rtems_fatal_error_occurred (sc);
|
| 670 |
|
|
rtems_interrupt_disable (level);
|
| 671 |
|
|
}
|
| 672 |
|
|
tty->rawOutBuf.theBuf[tty->rawOutBuf.Head] = *buf++;
|
| 673 |
|
|
tty->rawOutBuf.Head = newHead;
|
| 674 |
|
|
if (tty->rawOutBufState == rob_idle) {
|
| 675 |
|
|
/* check, whether XOFF has been received */
|
| 676 |
|
|
if (!(tty->flow_ctrl & FL_ORCVXOF)) {
|
| 677 |
|
|
(*tty->device.write)(tty->minor,
|
| 678 |
|
|
(char *)&tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail],1);
|
| 679 |
|
|
}
|
| 680 |
|
|
else {
|
| 681 |
|
|
/* remember that output has been stopped due to flow ctrl*/
|
| 682 |
|
|
tty->flow_ctrl |= FL_OSTOP;
|
| 683 |
|
|
}
|
| 684 |
|
|
tty->rawOutBufState = rob_busy;
|
| 685 |
|
|
}
|
| 686 |
|
|
rtems_interrupt_enable (level);
|
| 687 |
|
|
len--;
|
| 688 |
|
|
}
|
| 689 |
|
|
}
|
| 690 |
|
|
|
| 691 |
|
|
/*
|
| 692 |
|
|
* Handle output processing
|
| 693 |
|
|
*/
|
| 694 |
|
|
static void
|
| 695 |
|
|
oproc (unsigned char c, struct rtems_termios_tty *tty)
|
| 696 |
|
|
{
|
| 697 |
|
|
int i;
|
| 698 |
|
|
|
| 699 |
|
|
if (tty->termios.c_oflag & OPOST) {
|
| 700 |
|
|
switch (c) {
|
| 701 |
|
|
case '\n':
|
| 702 |
|
|
if (tty->termios.c_oflag & ONLRET)
|
| 703 |
|
|
tty->column = 0;
|
| 704 |
|
|
if (tty->termios.c_oflag & ONLCR) {
|
| 705 |
|
|
rtems_termios_puts ("\r", 1, tty);
|
| 706 |
|
|
tty->column = 0;
|
| 707 |
|
|
}
|
| 708 |
|
|
break;
|
| 709 |
|
|
|
| 710 |
|
|
case '\r':
|
| 711 |
|
|
if ((tty->termios.c_oflag & ONOCR) && (tty->column == 0))
|
| 712 |
|
|
return;
|
| 713 |
|
|
if (tty->termios.c_oflag & OCRNL) {
|
| 714 |
|
|
c = '\n';
|
| 715 |
|
|
if (tty->termios.c_oflag & ONLRET)
|
| 716 |
|
|
tty->column = 0;
|
| 717 |
|
|
break;
|
| 718 |
|
|
}
|
| 719 |
|
|
tty->column = 0;
|
| 720 |
|
|
break;
|
| 721 |
|
|
|
| 722 |
|
|
case '\t':
|
| 723 |
|
|
i = 8 - (tty->column & 7);
|
| 724 |
|
|
if ((tty->termios.c_oflag & TABDLY) == XTABS) {
|
| 725 |
|
|
tty->column += i;
|
| 726 |
|
|
rtems_termios_puts ( " ", i, tty);
|
| 727 |
|
|
return;
|
| 728 |
|
|
}
|
| 729 |
|
|
tty->column += i;
|
| 730 |
|
|
break;
|
| 731 |
|
|
|
| 732 |
|
|
case '\b':
|
| 733 |
|
|
if (tty->column > 0)
|
| 734 |
|
|
tty->column--;
|
| 735 |
|
|
break;
|
| 736 |
|
|
|
| 737 |
|
|
default:
|
| 738 |
|
|
if (tty->termios.c_oflag & OLCUC)
|
| 739 |
|
|
c = toupper(c);
|
| 740 |
|
|
if (!iscntrl(c))
|
| 741 |
|
|
tty->column++;
|
| 742 |
|
|
break;
|
| 743 |
|
|
}
|
| 744 |
|
|
}
|
| 745 |
|
|
rtems_termios_puts (&c, 1, tty);
|
| 746 |
|
|
}
|
| 747 |
|
|
|
| 748 |
|
|
rtems_status_code
|
| 749 |
|
|
rtems_termios_write (void *arg)
|
| 750 |
|
|
{
|
| 751 |
|
|
rtems_libio_rw_args_t *args = arg;
|
| 752 |
|
|
struct rtems_termios_tty *tty = args->iop->data1;
|
| 753 |
|
|
rtems_status_code sc;
|
| 754 |
|
|
|
| 755 |
|
|
sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 756 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 757 |
|
|
return sc;
|
| 758 |
|
|
if (linesw[tty->t_line].l_write != NULL) {
|
| 759 |
|
|
sc = linesw[tty->t_line].l_write(tty,args);
|
| 760 |
|
|
rtems_semaphore_release (tty->osem);
|
| 761 |
|
|
return sc;
|
| 762 |
|
|
}
|
| 763 |
|
|
if (tty->termios.c_oflag & OPOST) {
|
| 764 |
|
|
unsigned32 count = args->count;
|
| 765 |
|
|
unsigned8 *buffer = args->buffer;
|
| 766 |
|
|
while (count--)
|
| 767 |
|
|
oproc (*buffer++, tty);
|
| 768 |
|
|
args->bytes_moved = args->count;
|
| 769 |
|
|
}
|
| 770 |
|
|
else {
|
| 771 |
|
|
rtems_termios_puts (args->buffer, args->count, tty);
|
| 772 |
|
|
args->bytes_moved = args->count;
|
| 773 |
|
|
}
|
| 774 |
|
|
rtems_semaphore_release (tty->osem);
|
| 775 |
|
|
return sc;
|
| 776 |
|
|
}
|
| 777 |
|
|
|
| 778 |
|
|
/*
|
| 779 |
|
|
* Echo a typed character
|
| 780 |
|
|
*/
|
| 781 |
|
|
static void
|
| 782 |
|
|
echo (unsigned char c, struct rtems_termios_tty *tty)
|
| 783 |
|
|
{
|
| 784 |
|
|
if ((tty->termios.c_lflag & ECHOCTL) && iscntrl(c) && (c != '\t') && (c != '\n')) {
|
| 785 |
|
|
char echobuf[2];
|
| 786 |
|
|
|
| 787 |
|
|
echobuf[0] = '^';
|
| 788 |
|
|
echobuf[1] = c ^ 0x40;
|
| 789 |
|
|
rtems_termios_puts (echobuf, 2, tty);
|
| 790 |
|
|
tty->column += 2;
|
| 791 |
|
|
}
|
| 792 |
|
|
else {
|
| 793 |
|
|
oproc (c, tty);
|
| 794 |
|
|
}
|
| 795 |
|
|
}
|
| 796 |
|
|
|
| 797 |
|
|
/*
|
| 798 |
|
|
* Erase a character or line
|
| 799 |
|
|
* FIXME: Needs support for WERASE and ECHOPRT.
|
| 800 |
|
|
* FIXME: Some of the tests should check for IEXTEN, too.
|
| 801 |
|
|
*/
|
| 802 |
|
|
static void
|
| 803 |
|
|
erase (struct rtems_termios_tty *tty, int lineFlag)
|
| 804 |
|
|
{
|
| 805 |
|
|
if (tty->ccount == 0)
|
| 806 |
|
|
return;
|
| 807 |
|
|
if (lineFlag) {
|
| 808 |
|
|
if (!(tty->termios.c_lflag & ECHO)) {
|
| 809 |
|
|
tty->ccount = 0;
|
| 810 |
|
|
return;
|
| 811 |
|
|
}
|
| 812 |
|
|
if (!(tty->termios.c_lflag & ECHOE)) {
|
| 813 |
|
|
tty->ccount = 0;
|
| 814 |
|
|
echo (tty->termios.c_cc[VKILL], tty);
|
| 815 |
|
|
if (tty->termios.c_lflag & ECHOK)
|
| 816 |
|
|
echo ('\n', tty);
|
| 817 |
|
|
return;
|
| 818 |
|
|
}
|
| 819 |
|
|
}
|
| 820 |
|
|
while (tty->ccount) {
|
| 821 |
|
|
unsigned char c = tty->cbuf[--tty->ccount];
|
| 822 |
|
|
|
| 823 |
|
|
if (tty->termios.c_lflag & ECHO) {
|
| 824 |
|
|
if (!lineFlag && !(tty->termios.c_lflag & ECHOE)) {
|
| 825 |
|
|
echo (tty->termios.c_cc[VERASE], tty);
|
| 826 |
|
|
}
|
| 827 |
|
|
else if (c == '\t') {
|
| 828 |
|
|
int col = tty->read_start_column;
|
| 829 |
|
|
int i = 0;
|
| 830 |
|
|
|
| 831 |
|
|
/*
|
| 832 |
|
|
* Find the character before the tab
|
| 833 |
|
|
*/
|
| 834 |
|
|
while (i != tty->ccount) {
|
| 835 |
|
|
c = tty->cbuf[i++];
|
| 836 |
|
|
if (c == '\t') {
|
| 837 |
|
|
col = (col | 7) + 1;
|
| 838 |
|
|
}
|
| 839 |
|
|
else if (iscntrl (c)) {
|
| 840 |
|
|
if (tty->termios.c_lflag & ECHOCTL)
|
| 841 |
|
|
col += 2;
|
| 842 |
|
|
}
|
| 843 |
|
|
else {
|
| 844 |
|
|
col++;
|
| 845 |
|
|
}
|
| 846 |
|
|
}
|
| 847 |
|
|
|
| 848 |
|
|
/*
|
| 849 |
|
|
* Back up over the tab
|
| 850 |
|
|
*/
|
| 851 |
|
|
while (tty->column > col) {
|
| 852 |
|
|
rtems_termios_puts ("\b", 1, tty);
|
| 853 |
|
|
tty->column--;
|
| 854 |
|
|
}
|
| 855 |
|
|
}
|
| 856 |
|
|
else {
|
| 857 |
|
|
if (iscntrl (c) && (tty->termios.c_lflag & ECHOCTL)) {
|
| 858 |
|
|
rtems_termios_puts ("\b \b", 3, tty);
|
| 859 |
|
|
if (tty->column)
|
| 860 |
|
|
tty->column--;
|
| 861 |
|
|
}
|
| 862 |
|
|
if (!iscntrl (c) || (tty->termios.c_lflag & ECHOCTL)) {
|
| 863 |
|
|
rtems_termios_puts ("\b \b", 3, tty);
|
| 864 |
|
|
if (tty->column)
|
| 865 |
|
|
tty->column--;
|
| 866 |
|
|
}
|
| 867 |
|
|
}
|
| 868 |
|
|
}
|
| 869 |
|
|
if (!lineFlag)
|
| 870 |
|
|
break;
|
| 871 |
|
|
}
|
| 872 |
|
|
}
|
| 873 |
|
|
|
| 874 |
|
|
/*
|
| 875 |
|
|
* Process a single input character
|
| 876 |
|
|
*/
|
| 877 |
|
|
static int
|
| 878 |
|
|
iproc (unsigned char c, struct rtems_termios_tty *tty)
|
| 879 |
|
|
{
|
| 880 |
|
|
if (tty->termios.c_iflag & ISTRIP)
|
| 881 |
|
|
c &= 0x7f;
|
| 882 |
|
|
if (tty->termios.c_iflag & IUCLC)
|
| 883 |
|
|
c = tolower (c);
|
| 884 |
|
|
if (c == '\r') {
|
| 885 |
|
|
if (tty->termios.c_iflag & IGNCR)
|
| 886 |
|
|
return 0;
|
| 887 |
|
|
if (tty->termios.c_iflag & ICRNL)
|
| 888 |
|
|
c = '\n';
|
| 889 |
|
|
}
|
| 890 |
|
|
else if ((c == '\n') && (tty->termios.c_iflag & INLCR)) {
|
| 891 |
|
|
c = '\r';
|
| 892 |
|
|
}
|
| 893 |
|
|
if ((c != '\0') && (tty->termios.c_lflag & ICANON)) {
|
| 894 |
|
|
if (c == tty->termios.c_cc[VERASE]) {
|
| 895 |
|
|
erase (tty, 0);
|
| 896 |
|
|
return 0;
|
| 897 |
|
|
}
|
| 898 |
|
|
else if (c == tty->termios.c_cc[VKILL]) {
|
| 899 |
|
|
erase (tty, 1);
|
| 900 |
|
|
return 0;
|
| 901 |
|
|
}
|
| 902 |
|
|
else if (c == tty->termios.c_cc[VEOF]) {
|
| 903 |
|
|
return 1;
|
| 904 |
|
|
}
|
| 905 |
|
|
else if (c == '\n') {
|
| 906 |
|
|
if (tty->termios.c_lflag & (ECHO | ECHONL))
|
| 907 |
|
|
echo (c, tty);
|
| 908 |
|
|
tty->cbuf[tty->ccount++] = c;
|
| 909 |
|
|
return 1;
|
| 910 |
|
|
}
|
| 911 |
|
|
else if ((c == tty->termios.c_cc[VEOL])
|
| 912 |
|
|
|| (c == tty->termios.c_cc[VEOL2])) {
|
| 913 |
|
|
if (tty->termios.c_lflag & ECHO)
|
| 914 |
|
|
echo (c, tty);
|
| 915 |
|
|
tty->cbuf[tty->ccount++] = c;
|
| 916 |
|
|
return 1;
|
| 917 |
|
|
}
|
| 918 |
|
|
}
|
| 919 |
|
|
|
| 920 |
|
|
/*
|
| 921 |
|
|
* FIXME: Should do IMAXBEL handling somehow
|
| 922 |
|
|
*/
|
| 923 |
|
|
if (tty->ccount < (CBUFSIZE-1)) {
|
| 924 |
|
|
if (tty->termios.c_lflag & ECHO)
|
| 925 |
|
|
echo (c, tty);
|
| 926 |
|
|
tty->cbuf[tty->ccount++] = c;
|
| 927 |
|
|
}
|
| 928 |
|
|
return 0;
|
| 929 |
|
|
}
|
| 930 |
|
|
|
| 931 |
|
|
/*
|
| 932 |
|
|
* Process input character, with semaphore.
|
| 933 |
|
|
*/
|
| 934 |
|
|
static int
|
| 935 |
|
|
siproc (unsigned char c, struct rtems_termios_tty *tty)
|
| 936 |
|
|
{
|
| 937 |
|
|
int i;
|
| 938 |
|
|
|
| 939 |
|
|
/*
|
| 940 |
|
|
* Obtain output semaphore if character will be echoed
|
| 941 |
|
|
*/
|
| 942 |
|
|
if (tty->termios.c_lflag & (ECHO|ECHOE|ECHOK|ECHONL|ECHOPRT|ECHOCTL|ECHOKE)) {
|
| 943 |
|
|
rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 944 |
|
|
i = iproc (c, tty);
|
| 945 |
|
|
rtems_semaphore_release (tty->osem);
|
| 946 |
|
|
}
|
| 947 |
|
|
else {
|
| 948 |
|
|
i = iproc (c, tty);
|
| 949 |
|
|
}
|
| 950 |
|
|
return i;
|
| 951 |
|
|
}
|
| 952 |
|
|
|
| 953 |
|
|
/*
|
| 954 |
|
|
* Fill the input buffer by polling the device
|
| 955 |
|
|
*/
|
| 956 |
|
|
static rtems_status_code
|
| 957 |
|
|
fillBufferPoll (struct rtems_termios_tty *tty)
|
| 958 |
|
|
{
|
| 959 |
|
|
int n;
|
| 960 |
|
|
|
| 961 |
|
|
if (tty->termios.c_lflag & ICANON) {
|
| 962 |
|
|
for (;;) {
|
| 963 |
|
|
n = (*tty->device.pollRead)(tty->minor);
|
| 964 |
|
|
if (n < 0) {
|
| 965 |
|
|
rtems_task_wake_after (1);
|
| 966 |
|
|
}
|
| 967 |
|
|
else {
|
| 968 |
|
|
if (siproc (n, tty))
|
| 969 |
|
|
break;
|
| 970 |
|
|
}
|
| 971 |
|
|
}
|
| 972 |
|
|
}
|
| 973 |
|
|
else {
|
| 974 |
|
|
rtems_interval then, now;
|
| 975 |
|
|
if (!tty->termios.c_cc[VMIN] && tty->termios.c_cc[VTIME])
|
| 976 |
|
|
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &then);
|
| 977 |
|
|
for (;;) {
|
| 978 |
|
|
n = (*tty->device.pollRead)(tty->minor);
|
| 979 |
|
|
if (n < 0) {
|
| 980 |
|
|
if (tty->termios.c_cc[VMIN]) {
|
| 981 |
|
|
if (tty->termios.c_cc[VTIME] && tty->ccount) {
|
| 982 |
|
|
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now);
|
| 983 |
|
|
if ((now - then) > tty->vtimeTicks) {
|
| 984 |
|
|
break;
|
| 985 |
|
|
}
|
| 986 |
|
|
}
|
| 987 |
|
|
}
|
| 988 |
|
|
else {
|
| 989 |
|
|
if (!tty->termios.c_cc[VTIME])
|
| 990 |
|
|
break;
|
| 991 |
|
|
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now);
|
| 992 |
|
|
if ((now - then) > tty->vtimeTicks) {
|
| 993 |
|
|
break;
|
| 994 |
|
|
}
|
| 995 |
|
|
}
|
| 996 |
|
|
rtems_task_wake_after (1);
|
| 997 |
|
|
}
|
| 998 |
|
|
else {
|
| 999 |
|
|
siproc (n, tty);
|
| 1000 |
|
|
if (tty->ccount >= tty->termios.c_cc[VMIN])
|
| 1001 |
|
|
break;
|
| 1002 |
|
|
if (tty->termios.c_cc[VMIN] && tty->termios.c_cc[VTIME])
|
| 1003 |
|
|
rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &then);
|
| 1004 |
|
|
}
|
| 1005 |
|
|
}
|
| 1006 |
|
|
}
|
| 1007 |
|
|
return RTEMS_SUCCESSFUL;
|
| 1008 |
|
|
}
|
| 1009 |
|
|
|
| 1010 |
|
|
/*
|
| 1011 |
|
|
* Fill the input buffer from the raw input queue
|
| 1012 |
|
|
*/
|
| 1013 |
|
|
static rtems_status_code
|
| 1014 |
|
|
fillBufferQueue (struct rtems_termios_tty *tty)
|
| 1015 |
|
|
{
|
| 1016 |
|
|
rtems_interval timeout = tty->rawInBufSemaphoreFirstTimeout;
|
| 1017 |
|
|
rtems_status_code sc;
|
| 1018 |
|
|
int wait = (int)1;
|
| 1019 |
|
|
|
| 1020 |
|
|
while ( wait ) {
|
| 1021 |
|
|
/*
|
| 1022 |
|
|
* Process characters read from raw queue
|
| 1023 |
|
|
*/
|
| 1024 |
|
|
while (tty->rawInBuf.Head != tty->rawInBuf.Tail) {
|
| 1025 |
|
|
unsigned char c;
|
| 1026 |
|
|
unsigned int newHead;
|
| 1027 |
|
|
|
| 1028 |
|
|
newHead = (tty->rawInBuf.Head + 1) % tty->rawInBuf.Size;
|
| 1029 |
|
|
c = tty->rawInBuf.theBuf[newHead];
|
| 1030 |
|
|
tty->rawInBuf.Head = newHead;
|
| 1031 |
|
|
if(((tty->rawInBuf.Tail-newHead+tty->rawInBuf.Size)
|
| 1032 |
|
|
% tty->rawInBuf.Size)
|
| 1033 |
|
|
< tty->lowwater) {
|
| 1034 |
|
|
tty->flow_ctrl &= ~FL_IREQXOF;
|
| 1035 |
|
|
/* if tx stopped and XON should be sent... */
|
| 1036 |
|
|
if (((tty->flow_ctrl & (FL_MDXON | FL_ISNTXOF))
|
| 1037 |
|
|
== (FL_MDXON | FL_ISNTXOF))
|
| 1038 |
|
|
&& ((tty->rawOutBufState == rob_idle)
|
| 1039 |
|
|
|| (tty->flow_ctrl & FL_OSTOP))) {
|
| 1040 |
|
|
/* XON should be sent now... */
|
| 1041 |
|
|
(*tty->device.write)(tty->minor,
|
| 1042 |
|
|
&(tty->termios.c_cc[VSTART]),
|
| 1043 |
|
|
1);
|
| 1044 |
|
|
}
|
| 1045 |
|
|
else if (tty->flow_ctrl & FL_MDRTS) {
|
| 1046 |
|
|
tty->flow_ctrl &= ~FL_IRTSOFF;
|
| 1047 |
|
|
/* activate RTS line */
|
| 1048 |
|
|
if (tty->device.startRemoteTx != NULL) {
|
| 1049 |
|
|
tty->device.startRemoteTx(tty->minor);
|
| 1050 |
|
|
}
|
| 1051 |
|
|
}
|
| 1052 |
|
|
}
|
| 1053 |
|
|
|
| 1054 |
|
|
/* continue processing new character */
|
| 1055 |
|
|
if (tty->termios.c_lflag & ICANON) {
|
| 1056 |
|
|
if (siproc (c, tty))
|
| 1057 |
|
|
wait = 0;
|
| 1058 |
|
|
}
|
| 1059 |
|
|
else {
|
| 1060 |
|
|
siproc (c, tty);
|
| 1061 |
|
|
if (tty->ccount >= tty->termios.c_cc[VMIN])
|
| 1062 |
|
|
wait = 0;
|
| 1063 |
|
|
}
|
| 1064 |
|
|
timeout = tty->rawInBufSemaphoreTimeout;
|
| 1065 |
|
|
}
|
| 1066 |
|
|
|
| 1067 |
|
|
/*
|
| 1068 |
|
|
* Wait for characters
|
| 1069 |
|
|
*/
|
| 1070 |
|
|
if ( wait ) {
|
| 1071 |
|
|
sc = rtems_semaphore_obtain (tty->rawInBuf.Semaphore,
|
| 1072 |
|
|
tty->rawInBufSemaphoreOptions,
|
| 1073 |
|
|
timeout);
|
| 1074 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 1075 |
|
|
break;
|
| 1076 |
|
|
}
|
| 1077 |
|
|
}
|
| 1078 |
|
|
return RTEMS_SUCCESSFUL;
|
| 1079 |
|
|
}
|
| 1080 |
|
|
|
| 1081 |
|
|
rtems_status_code
|
| 1082 |
|
|
rtems_termios_read (void *arg)
|
| 1083 |
|
|
{
|
| 1084 |
|
|
rtems_libio_rw_args_t *args = arg;
|
| 1085 |
|
|
struct rtems_termios_tty *tty = args->iop->data1;
|
| 1086 |
|
|
unsigned32 count = args->count;
|
| 1087 |
|
|
unsigned8 *buffer = args->buffer;
|
| 1088 |
|
|
rtems_status_code sc;
|
| 1089 |
|
|
|
| 1090 |
|
|
sc = rtems_semaphore_obtain (tty->isem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
|
| 1091 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 1092 |
|
|
return sc;
|
| 1093 |
|
|
if (linesw[tty->t_line].l_read != NULL) {
|
| 1094 |
|
|
sc = linesw[tty->t_line].l_read(tty,args);
|
| 1095 |
|
|
tty->tty_rcvwakeup = 0;
|
| 1096 |
|
|
rtems_semaphore_release (tty->isem);
|
| 1097 |
|
|
return sc;
|
| 1098 |
|
|
}
|
| 1099 |
|
|
if (tty->cindex == tty->ccount) {
|
| 1100 |
|
|
tty->cindex = tty->ccount = 0;
|
| 1101 |
|
|
tty->read_start_column = tty->column;
|
| 1102 |
|
|
if (tty->device.pollRead != NULL
|
| 1103 |
|
|
&& tty->device.outputUsesInterrupts == TERMIOS_POLLED)
|
| 1104 |
|
|
sc = fillBufferPoll (tty);
|
| 1105 |
|
|
else
|
| 1106 |
|
|
sc = fillBufferQueue (tty);
|
| 1107 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 1108 |
|
|
tty->cindex = tty->ccount = 0;
|
| 1109 |
|
|
}
|
| 1110 |
|
|
while (count && (tty->cindex < tty->ccount)) {
|
| 1111 |
|
|
*buffer++ = tty->cbuf[tty->cindex++];
|
| 1112 |
|
|
count--;
|
| 1113 |
|
|
}
|
| 1114 |
|
|
args->bytes_moved = args->count - count;
|
| 1115 |
|
|
tty->tty_rcvwakeup = 0;
|
| 1116 |
|
|
rtems_semaphore_release (tty->isem);
|
| 1117 |
|
|
return sc;
|
| 1118 |
|
|
}
|
| 1119 |
|
|
|
| 1120 |
|
|
/*
|
| 1121 |
|
|
* signal receive interrupt to rx daemon
|
| 1122 |
|
|
* NOTE: This routine runs in the context of the
|
| 1123 |
|
|
* device receive interrupt handler.
|
| 1124 |
|
|
*/
|
| 1125 |
|
|
void rtems_termios_rxirq_occured(struct rtems_termios_tty *tty)
|
| 1126 |
|
|
{
|
| 1127 |
|
|
/*
|
| 1128 |
|
|
* send event to rx daemon task
|
| 1129 |
|
|
*/
|
| 1130 |
|
|
rtems_event_send(tty->rxTaskId,TERMIOS_RX_PROC_EVENT);
|
| 1131 |
|
|
}
|
| 1132 |
|
|
|
| 1133 |
|
|
/*
|
| 1134 |
|
|
* Place characters on raw queue.
|
| 1135 |
|
|
* NOTE: This routine runs in the context of the
|
| 1136 |
|
|
* device receive interrupt handler.
|
| 1137 |
|
|
* Returns the number of characters dropped because of overflow.
|
| 1138 |
|
|
*/
|
| 1139 |
|
|
int
|
| 1140 |
|
|
rtems_termios_enqueue_raw_characters (void *ttyp, char *buf, int len)
|
| 1141 |
|
|
{
|
| 1142 |
|
|
struct rtems_termios_tty *tty = ttyp;
|
| 1143 |
|
|
unsigned int newTail;
|
| 1144 |
|
|
char c;
|
| 1145 |
|
|
int dropped = 0;
|
| 1146 |
|
|
boolean flow_rcv = FALSE; /* TRUE, if flow control char received */
|
| 1147 |
|
|
rtems_interrupt_level level;
|
| 1148 |
|
|
|
| 1149 |
|
|
if (linesw[tty->t_line].l_rint != NULL) {
|
| 1150 |
|
|
while (len--) {
|
| 1151 |
|
|
c = *buf++;
|
| 1152 |
|
|
linesw[tty->t_line].l_rint(c,tty);
|
| 1153 |
|
|
}
|
| 1154 |
|
|
|
| 1155 |
|
|
/*
|
| 1156 |
|
|
* check to see if rcv wakeup callback was set
|
| 1157 |
|
|
*/
|
| 1158 |
|
|
if (( !tty->tty_rcvwakeup ) && ( tty->tty_rcv.sw_pfn != NULL )) {
|
| 1159 |
|
|
(*tty->tty_rcv.sw_pfn)(&tty->termios, tty->tty_rcv.sw_arg);
|
| 1160 |
|
|
tty->tty_rcvwakeup = 1;
|
| 1161 |
|
|
}
|
| 1162 |
|
|
return 0;
|
| 1163 |
|
|
}
|
| 1164 |
|
|
|
| 1165 |
|
|
while (len--) {
|
| 1166 |
|
|
c = *buf++;
|
| 1167 |
|
|
/* FIXME: implement IXANY: any character restarts output */
|
| 1168 |
|
|
/* if incoming XON/XOFF controls outgoing stream: */
|
| 1169 |
|
|
if (tty->flow_ctrl & FL_MDXON) {
|
| 1170 |
|
|
/* if received char is V_STOP and V_START (both are equal value) */
|
| 1171 |
|
|
if (c == tty->termios.c_cc[VSTOP]) {
|
| 1172 |
|
|
if (c == tty->termios.c_cc[VSTART]) {
|
| 1173 |
|
|
/* received VSTOP and VSTART==VSTOP? */
|
| 1174 |
|
|
/* then toggle "stop output" status */
|
| 1175 |
|
|
tty->flow_ctrl = tty->flow_ctrl ^ FL_ORCVXOF;
|
| 1176 |
|
|
}
|
| 1177 |
|
|
else {
|
| 1178 |
|
|
/* VSTOP received (other code than VSTART) */
|
| 1179 |
|
|
/* stop output */
|
| 1180 |
|
|
tty->flow_ctrl |= FL_ORCVXOF;
|
| 1181 |
|
|
}
|
| 1182 |
|
|
flow_rcv = TRUE;
|
| 1183 |
|
|
}
|
| 1184 |
|
|
else if (c == tty->termios.c_cc[VSTART]) {
|
| 1185 |
|
|
/* VSTART received */
|
| 1186 |
|
|
/* restart output */
|
| 1187 |
|
|
tty->flow_ctrl &= ~FL_ORCVXOF;
|
| 1188 |
|
|
flow_rcv = TRUE;
|
| 1189 |
|
|
}
|
| 1190 |
|
|
}
|
| 1191 |
|
|
if (flow_rcv) {
|
| 1192 |
|
|
/* restart output according to FL_ORCVXOF flag */
|
| 1193 |
|
|
if ((tty->flow_ctrl & (FL_ORCVXOF | FL_OSTOP)) == FL_OSTOP) {
|
| 1194 |
|
|
/* disable interrupts */
|
| 1195 |
|
|
rtems_interrupt_disable(level);
|
| 1196 |
|
|
tty->flow_ctrl &= ~FL_OSTOP;
|
| 1197 |
|
|
/* check for chars in output buffer (or rob_state?) */
|
| 1198 |
|
|
if (tty->rawOutBufState != rob_idle) {
|
| 1199 |
|
|
/* if chars available, call write function... */
|
| 1200 |
|
|
(*tty->device.write)(tty->minor,
|
| 1201 |
|
|
(char *)&tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail], 1);
|
| 1202 |
|
|
}
|
| 1203 |
|
|
/* reenable interrupts */
|
| 1204 |
|
|
rtems_interrupt_enable(level);
|
| 1205 |
|
|
}
|
| 1206 |
|
|
}
|
| 1207 |
|
|
else {
|
| 1208 |
|
|
newTail = (tty->rawInBuf.Tail + 1) % tty->rawInBuf.Size;
|
| 1209 |
|
|
/* if chars_in_buffer > highwater */
|
| 1210 |
|
|
rtems_interrupt_disable(level);
|
| 1211 |
|
|
if ((((newTail - tty->rawInBuf.Head + tty->rawInBuf.Size)
|
| 1212 |
|
|
% tty->rawInBuf.Size)
|
| 1213 |
|
|
> tty->highwater) &&
|
| 1214 |
|
|
!(tty->flow_ctrl & FL_IREQXOF)) {
|
| 1215 |
|
|
/* incoming data stream should be stopped */
|
| 1216 |
|
|
tty->flow_ctrl |= FL_IREQXOF;
|
| 1217 |
|
|
if ((tty->flow_ctrl & (FL_MDXOF | FL_ISNTXOF))
|
| 1218 |
|
|
== (FL_MDXOF ) ){
|
| 1219 |
|
|
if ((tty->flow_ctrl & FL_OSTOP) ||
|
| 1220 |
|
|
(tty->rawOutBufState == rob_idle)) {
|
| 1221 |
|
|
/* if tx is stopped due to XOFF or out of data */
|
| 1222 |
|
|
/* call write function here */
|
| 1223 |
|
|
tty->flow_ctrl |= FL_ISNTXOF;
|
| 1224 |
|
|
(*tty->device.write)(tty->minor,
|
| 1225 |
|
|
&(tty->termios.c_cc[VSTOP]),
|
| 1226 |
|
|
1);
|
| 1227 |
|
|
}
|
| 1228 |
|
|
}
|
| 1229 |
|
|
else if ((tty->flow_ctrl & (FL_MDRTS | FL_IRTSOFF))
|
| 1230 |
|
|
== (FL_MDRTS ) ) {
|
| 1231 |
|
|
tty->flow_ctrl |= FL_IRTSOFF;
|
| 1232 |
|
|
/* deactivate RTS line */
|
| 1233 |
|
|
if (tty->device.stopRemoteTx != NULL) {
|
| 1234 |
|
|
tty->device.stopRemoteTx(tty->minor);
|
| 1235 |
|
|
}
|
| 1236 |
|
|
}
|
| 1237 |
|
|
}
|
| 1238 |
|
|
/* reenable interrupts */
|
| 1239 |
|
|
rtems_interrupt_enable(level);
|
| 1240 |
|
|
|
| 1241 |
|
|
if (newTail == tty->rawInBuf.Head) {
|
| 1242 |
|
|
dropped++;
|
| 1243 |
|
|
}
|
| 1244 |
|
|
else {
|
| 1245 |
|
|
tty->rawInBuf.theBuf[newTail] = c;
|
| 1246 |
|
|
tty->rawInBuf.Tail = newTail;
|
| 1247 |
|
|
|
| 1248 |
|
|
/*
|
| 1249 |
|
|
* check to see if rcv wakeup callback was set
|
| 1250 |
|
|
*/
|
| 1251 |
|
|
if (( !tty->tty_rcvwakeup ) && ( tty->tty_rcv.sw_pfn != NULL )) {
|
| 1252 |
|
|
(*tty->tty_rcv.sw_pfn)(&tty->termios, tty->tty_rcv.sw_arg);
|
| 1253 |
|
|
tty->tty_rcvwakeup = 1;
|
| 1254 |
|
|
}
|
| 1255 |
|
|
}
|
| 1256 |
|
|
}
|
| 1257 |
|
|
}
|
| 1258 |
|
|
tty->rawInBufDropped += dropped;
|
| 1259 |
|
|
rtems_semaphore_release (tty->rawInBuf.Semaphore);
|
| 1260 |
|
|
return dropped;
|
| 1261 |
|
|
}
|
| 1262 |
|
|
|
| 1263 |
|
|
/*
|
| 1264 |
|
|
* in task-driven mode, this function is called in Tx task context
|
| 1265 |
|
|
* in interrupt-driven mode, this function is called in TxIRQ context
|
| 1266 |
|
|
*/
|
| 1267 |
|
|
int
|
| 1268 |
|
|
rtems_termios_refill_transmitter (struct rtems_termios_tty *tty)
|
| 1269 |
|
|
{
|
| 1270 |
|
|
unsigned int newTail;
|
| 1271 |
|
|
int nToSend;
|
| 1272 |
|
|
rtems_interrupt_level level;
|
| 1273 |
|
|
int len;
|
| 1274 |
|
|
|
| 1275 |
|
|
/* check for XOF/XON to send */
|
| 1276 |
|
|
if ((tty->flow_ctrl & (FL_MDXOF | FL_IREQXOF | FL_ISNTXOF))
|
| 1277 |
|
|
== (FL_MDXOF | FL_IREQXOF)) {
|
| 1278 |
|
|
/* XOFF should be sent now... */
|
| 1279 |
|
|
(*tty->device.write)(tty->minor,
|
| 1280 |
|
|
&(tty->termios.c_cc[VSTOP]), 1);
|
| 1281 |
|
|
|
| 1282 |
|
|
rtems_interrupt_disable(level);
|
| 1283 |
|
|
tty->t_dqlen--;
|
| 1284 |
|
|
tty->flow_ctrl |= FL_ISNTXOF;
|
| 1285 |
|
|
rtems_interrupt_enable(level);
|
| 1286 |
|
|
|
| 1287 |
|
|
nToSend = 1;
|
| 1288 |
|
|
}
|
| 1289 |
|
|
else if ((tty->flow_ctrl & (FL_IREQXOF | FL_ISNTXOF))
|
| 1290 |
|
|
== FL_ISNTXOF) {
|
| 1291 |
|
|
/* NOTE: send XON even, if no longer in XON/XOFF mode... */
|
| 1292 |
|
|
/* XON should be sent now... */
|
| 1293 |
|
|
/*
|
| 1294 |
|
|
* FIXME: this .write call will generate another
|
| 1295 |
|
|
* dequeue callback. This will advance the "Tail" in the data
|
| 1296 |
|
|
* buffer, although the corresponding data is not yet out!
|
| 1297 |
|
|
* Therefore the dequeue "length" should be reduced by 1
|
| 1298 |
|
|
*/
|
| 1299 |
|
|
(*tty->device.write)(tty->minor,
|
| 1300 |
|
|
&(tty->termios.c_cc[VSTART]), 1);
|
| 1301 |
|
|
|
| 1302 |
|
|
rtems_interrupt_disable(level);
|
| 1303 |
|
|
tty->t_dqlen--;
|
| 1304 |
|
|
tty->flow_ctrl &= ~FL_ISNTXOF;
|
| 1305 |
|
|
rtems_interrupt_enable(level);
|
| 1306 |
|
|
|
| 1307 |
|
|
nToSend = 1;
|
| 1308 |
|
|
}
|
| 1309 |
|
|
else {
|
| 1310 |
|
|
if ( tty->rawOutBuf.Head == tty->rawOutBuf.Tail ) {
|
| 1311 |
|
|
/*
|
| 1312 |
|
|
* buffer was empty
|
| 1313 |
|
|
*/
|
| 1314 |
|
|
if (tty->rawOutBufState == rob_wait) {
|
| 1315 |
|
|
/*
|
| 1316 |
|
|
* this should never happen...
|
| 1317 |
|
|
*/
|
| 1318 |
|
|
rtems_semaphore_release (tty->rawOutBuf.Semaphore);
|
| 1319 |
|
|
}
|
| 1320 |
|
|
return 0;
|
| 1321 |
|
|
}
|
| 1322 |
|
|
|
| 1323 |
|
|
rtems_interrupt_disable(level);
|
| 1324 |
|
|
len = tty->t_dqlen;
|
| 1325 |
|
|
tty->t_dqlen = 0;
|
| 1326 |
|
|
rtems_interrupt_enable(level);
|
| 1327 |
|
|
|
| 1328 |
|
|
newTail = (tty->rawOutBuf.Tail + len) % tty->rawOutBuf.Size;
|
| 1329 |
|
|
tty->rawOutBuf.Tail = newTail;
|
| 1330 |
|
|
if (tty->rawOutBufState == rob_wait) {
|
| 1331 |
|
|
/*
|
| 1332 |
|
|
* wake up any pending writer task
|
| 1333 |
|
|
*/
|
| 1334 |
|
|
rtems_semaphore_release (tty->rawOutBuf.Semaphore);
|
| 1335 |
|
|
}
|
| 1336 |
|
|
if (newTail == tty->rawOutBuf.Head) {
|
| 1337 |
|
|
/*
|
| 1338 |
|
|
* Buffer has become empty
|
| 1339 |
|
|
*/
|
| 1340 |
|
|
tty->rawOutBufState = rob_idle;
|
| 1341 |
|
|
nToSend = 0;
|
| 1342 |
|
|
|
| 1343 |
|
|
/*
|
| 1344 |
|
|
* check to see if snd wakeup callback was set
|
| 1345 |
|
|
*/
|
| 1346 |
|
|
if ( tty->tty_snd.sw_pfn != NULL) {
|
| 1347 |
|
|
(*tty->tty_snd.sw_pfn)(&tty->termios, tty->tty_snd.sw_arg);
|
| 1348 |
|
|
}
|
| 1349 |
|
|
}
|
| 1350 |
|
|
/* check, whether output should stop due to received XOFF */
|
| 1351 |
|
|
else if ((tty->flow_ctrl & (FL_MDXON | FL_ORCVXOF))
|
| 1352 |
|
|
== (FL_MDXON | FL_ORCVXOF)) {
|
| 1353 |
|
|
/* Buffer not empty, but output stops due to XOFF */
|
| 1354 |
|
|
/* set flag, that output has been stopped */
|
| 1355 |
|
|
rtems_interrupt_disable(level);
|
| 1356 |
|
|
tty->flow_ctrl |= FL_OSTOP;
|
| 1357 |
|
|
tty->rawOutBufState = rob_busy; /*apm*/
|
| 1358 |
|
|
rtems_interrupt_enable(level);
|
| 1359 |
|
|
nToSend = 0;
|
| 1360 |
|
|
}
|
| 1361 |
|
|
else {
|
| 1362 |
|
|
/*
|
| 1363 |
|
|
* Buffer not empty, start tranmitter
|
| 1364 |
|
|
*/
|
| 1365 |
|
|
if (newTail > tty->rawOutBuf.Head)
|
| 1366 |
|
|
nToSend = tty->rawOutBuf.Size - newTail;
|
| 1367 |
|
|
else
|
| 1368 |
|
|
nToSend = tty->rawOutBuf.Head - newTail;
|
| 1369 |
|
|
/* when flow control XON or XOF, don't send blocks of data */
|
| 1370 |
|
|
/* to allow fast reaction on incoming flow ctrl and low latency*/
|
| 1371 |
|
|
/* for outgoing flow control */
|
| 1372 |
|
|
if (tty->flow_ctrl & (FL_MDXON | FL_MDXOF)) {
|
| 1373 |
|
|
nToSend = 1;
|
| 1374 |
|
|
}
|
| 1375 |
|
|
tty->rawOutBufState = rob_busy; /*apm*/
|
| 1376 |
|
|
(*tty->device.write)(tty->minor,
|
| 1377 |
|
|
(char *)&tty->rawOutBuf.theBuf[newTail],
|
| 1378 |
|
|
nToSend);
|
| 1379 |
|
|
}
|
| 1380 |
|
|
tty->rawOutBuf.Tail = newTail; /*apm*/
|
| 1381 |
|
|
}
|
| 1382 |
|
|
return nToSend;
|
| 1383 |
|
|
}
|
| 1384 |
|
|
|
| 1385 |
|
|
/*
|
| 1386 |
|
|
* Characters have been transmitted
|
| 1387 |
|
|
* NOTE: This routine runs in the context of the
|
| 1388 |
|
|
* device transmit interrupt handler.
|
| 1389 |
|
|
* The second argument is the number of characters transmitted so far.
|
| 1390 |
|
|
* This value will always be 1 for devices which generate an interrupt
|
| 1391 |
|
|
* for each transmitted character.
|
| 1392 |
|
|
* It returns number of characters left to transmit
|
| 1393 |
|
|
*/
|
| 1394 |
|
|
int
|
| 1395 |
|
|
rtems_termios_dequeue_characters (void *ttyp, int len)
|
| 1396 |
|
|
{
|
| 1397 |
|
|
struct rtems_termios_tty *tty = ttyp;
|
| 1398 |
|
|
rtems_status_code sc;
|
| 1399 |
|
|
|
| 1400 |
|
|
/*
|
| 1401 |
|
|
* sum up character count already sent
|
| 1402 |
|
|
*/
|
| 1403 |
|
|
tty->t_dqlen += len;
|
| 1404 |
|
|
|
| 1405 |
|
|
if (tty->device.outputUsesInterrupts == TERMIOS_TASK_DRIVEN) {
|
| 1406 |
|
|
/*
|
| 1407 |
|
|
* send wake up to transmitter task
|
| 1408 |
|
|
*/
|
| 1409 |
|
|
sc = rtems_event_send(tty->txTaskId,
|
| 1410 |
|
|
TERMIOS_TX_START_EVENT);
|
| 1411 |
|
|
if (sc != RTEMS_SUCCESSFUL)
|
| 1412 |
|
|
rtems_fatal_error_occurred (sc);
|
| 1413 |
|
|
return 0; /* nothing to output in IRQ... */
|
| 1414 |
|
|
}
|
| 1415 |
|
|
else if (tty->t_line == PPPDISC ) {
|
| 1416 |
|
|
/*
|
| 1417 |
|
|
* call any line discipline start function
|
| 1418 |
|
|
*/
|
| 1419 |
|
|
if (linesw[tty->t_line].l_start != NULL) {
|
| 1420 |
|
|
linesw[tty->t_line].l_start(tty);
|
| 1421 |
|
|
}
|
| 1422 |
|
|
return 0; /* nothing to output in IRQ... */
|
| 1423 |
|
|
}
|
| 1424 |
|
|
else {
|
| 1425 |
|
|
return rtems_termios_refill_transmitter(tty);
|
| 1426 |
|
|
}
|
| 1427 |
|
|
}
|
| 1428 |
|
|
|
| 1429 |
|
|
/*
|
| 1430 |
|
|
* this task actually processes any transmit events
|
| 1431 |
|
|
*/
|
| 1432 |
|
|
static rtems_task rtems_termios_txdaemon(rtems_task_argument argument)
|
| 1433 |
|
|
{
|
| 1434 |
|
|
struct rtems_termios_tty *tty = (struct rtems_termios_tty *)argument;
|
| 1435 |
|
|
rtems_event_set the_event;
|
| 1436 |
|
|
|
| 1437 |
|
|
while (1) {
|
| 1438 |
|
|
/*
|
| 1439 |
|
|
* wait for rtems event
|
| 1440 |
|
|
*/
|
| 1441 |
|
|
rtems_event_receive((TERMIOS_TX_START_EVENT |
|
| 1442 |
|
|
TERMIOS_TX_TERMINATE_EVENT),
|
| 1443 |
|
|
RTEMS_EVENT_ANY | RTEMS_WAIT,
|
| 1444 |
|
|
RTEMS_NO_TIMEOUT,
|
| 1445 |
|
|
&the_event);
|
| 1446 |
|
|
if ((the_event & TERMIOS_TX_TERMINATE_EVENT) != 0) {
|
| 1447 |
|
|
tty->txTaskId = 0;
|
| 1448 |
|
|
rtems_task_delete(RTEMS_SELF);
|
| 1449 |
|
|
}
|
| 1450 |
|
|
else {
|
| 1451 |
|
|
/*
|
| 1452 |
|
|
* call any line discipline start function
|
| 1453 |
|
|
*/
|
| 1454 |
|
|
if (linesw[tty->t_line].l_start != NULL) {
|
| 1455 |
|
|
linesw[tty->t_line].l_start(tty);
|
| 1456 |
|
|
}
|
| 1457 |
|
|
/*
|
| 1458 |
|
|
* try to push further characters to device
|
| 1459 |
|
|
*/
|
| 1460 |
|
|
rtems_termios_refill_transmitter(tty);
|
| 1461 |
|
|
}
|
| 1462 |
|
|
}
|
| 1463 |
|
|
}
|
| 1464 |
|
|
|
| 1465 |
|
|
/*
|
| 1466 |
|
|
* this task actually processes any receive events
|
| 1467 |
|
|
*/
|
| 1468 |
|
|
static rtems_task rtems_termios_rxdaemon(rtems_task_argument argument)
|
| 1469 |
|
|
{
|
| 1470 |
|
|
struct rtems_termios_tty *tty = (struct rtems_termios_tty *)argument;
|
| 1471 |
|
|
rtems_event_set the_event;
|
| 1472 |
|
|
int c;
|
| 1473 |
|
|
char c_buf;
|
| 1474 |
|
|
while (1) {
|
| 1475 |
|
|
/*
|
| 1476 |
|
|
* wait for rtems event
|
| 1477 |
|
|
*/
|
| 1478 |
|
|
rtems_event_receive((TERMIOS_RX_PROC_EVENT |
|
| 1479 |
|
|
TERMIOS_RX_TERMINATE_EVENT),
|
| 1480 |
|
|
RTEMS_EVENT_ANY | RTEMS_WAIT,
|
| 1481 |
|
|
RTEMS_NO_TIMEOUT,
|
| 1482 |
|
|
&the_event);
|
| 1483 |
|
|
if ((the_event & TERMIOS_RX_TERMINATE_EVENT) != 0) {
|
| 1484 |
|
|
tty->rxTaskId = 0;
|
| 1485 |
|
|
rtems_task_delete(RTEMS_SELF);
|
| 1486 |
|
|
}
|
| 1487 |
|
|
else {
|
| 1488 |
|
|
/*
|
| 1489 |
|
|
* do something
|
| 1490 |
|
|
*/
|
| 1491 |
|
|
c = tty->device.pollRead(tty->minor);
|
| 1492 |
|
|
if (c != EOF) {
|
| 1493 |
|
|
/*
|
| 1494 |
|
|
* pollRead did call enqueue on its own
|
| 1495 |
|
|
*/
|
| 1496 |
|
|
c_buf = c;
|
| 1497 |
|
|
rtems_termios_enqueue_raw_characters (
|
| 1498 |
|
|
tty,&c_buf,1);
|
| 1499 |
|
|
}
|
| 1500 |
|
|
}
|
| 1501 |
|
|
}
|
| 1502 |
|
|
}
|
