1 /*********************************************************************
2 *
3 * Filename: ircomm_tty_ioctl.c
4 * Version:
5 * Description:
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Thu Jun 10 14:39:09 1999
9 * Modified at: Wed Jan 5 14:45:43 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * MA 02111-1307 USA
28 *
29 ********************************************************************/
30
31 #include <linux/init.h>
32 #include <linux/fs.h>
33 #include <linux/termios.h>
34 #include <linux/tty.h>
35 #include <linux/serial.h>
36
37 #include <asm/uaccess.h>
38
39 #include <net/irda/irda.h>
40 #include <net/irda/irmod.h>
41
42 #include <net/irda/ircomm_core.h>
43 #include <net/irda/ircomm_param.h>
44 #include <net/irda/ircomm_tty_attach.h>
45 #include <net/irda/ircomm_tty.h>
46
47 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
48
49 /*
50 * Function ircomm_tty_change_speed (driver)
51 *
52 * Change speed of the driver. If the remote device is a DCE, then this
53 * should make it change the speed of its serial port
54 */
ircomm_tty_change_speed(struct ircomm_tty_cb * self,struct tty_struct * tty)55 static void ircomm_tty_change_speed(struct ircomm_tty_cb *self,
56 struct tty_struct *tty)
57 {
58 unsigned int cflag, cval;
59 int baud;
60
61 IRDA_DEBUG(2, "%s()\n", __func__ );
62
63 if (!self->ircomm)
64 return;
65
66 cflag = tty->termios.c_cflag;
67
68 /* byte size and parity */
69 switch (cflag & CSIZE) {
70 case CS5: cval = IRCOMM_WSIZE_5; break;
71 case CS6: cval = IRCOMM_WSIZE_6; break;
72 case CS7: cval = IRCOMM_WSIZE_7; break;
73 case CS8: cval = IRCOMM_WSIZE_8; break;
74 default: cval = IRCOMM_WSIZE_5; break;
75 }
76 if (cflag & CSTOPB)
77 cval |= IRCOMM_2_STOP_BIT;
78
79 if (cflag & PARENB)
80 cval |= IRCOMM_PARITY_ENABLE;
81 if (!(cflag & PARODD))
82 cval |= IRCOMM_PARITY_EVEN;
83
84 /* Determine divisor based on baud rate */
85 baud = tty_get_baud_rate(tty);
86 if (!baud)
87 baud = 9600; /* B0 transition handled in rs_set_termios */
88
89 self->settings.data_rate = baud;
90 ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE);
91
92 /* CTS flow control flag and modem status interrupts */
93 if (cflag & CRTSCTS) {
94 self->port.flags |= ASYNC_CTS_FLOW;
95 self->settings.flow_control |= IRCOMM_RTS_CTS_IN;
96 /* This got me. Bummer. Jean II */
97 if (self->service_type == IRCOMM_3_WIRE_RAW)
98 IRDA_WARNING("%s(), enabling RTS/CTS on link that doesn't support it (3-wire-raw)\n", __func__);
99 } else {
100 self->port.flags &= ~ASYNC_CTS_FLOW;
101 self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN;
102 }
103 if (cflag & CLOCAL)
104 self->port.flags &= ~ASYNC_CHECK_CD;
105 else
106 self->port.flags |= ASYNC_CHECK_CD;
107 #if 0
108 /*
109 * Set up parity check flag
110 */
111
112 if (I_INPCK(self->tty))
113 driver->read_status_mask |= LSR_FE | LSR_PE;
114 if (I_BRKINT(driver->tty) || I_PARMRK(driver->tty))
115 driver->read_status_mask |= LSR_BI;
116
117 /*
118 * Characters to ignore
119 */
120 driver->ignore_status_mask = 0;
121 if (I_IGNPAR(driver->tty))
122 driver->ignore_status_mask |= LSR_PE | LSR_FE;
123
124 if (I_IGNBRK(self->tty)) {
125 self->ignore_status_mask |= LSR_BI;
126 /*
127 * If we're ignore parity and break indicators, ignore
128 * overruns too. (For real raw support).
129 */
130 if (I_IGNPAR(self->tty))
131 self->ignore_status_mask |= LSR_OE;
132 }
133 #endif
134 self->settings.data_format = cval;
135
136 ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
137 ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE);
138 }
139
140 /*
141 * Function ircomm_tty_set_termios (tty, old_termios)
142 *
143 * This routine allows the tty driver to be notified when device's
144 * termios settings have changed. Note that a well-designed tty driver
145 * should be prepared to accept the case where old == NULL, and try to
146 * do something rational.
147 */
ircomm_tty_set_termios(struct tty_struct * tty,struct ktermios * old_termios)148 void ircomm_tty_set_termios(struct tty_struct *tty,
149 struct ktermios *old_termios)
150 {
151 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
152 unsigned int cflag = tty->termios.c_cflag;
153
154 IRDA_DEBUG(2, "%s()\n", __func__ );
155
156 if ((cflag == old_termios->c_cflag) &&
157 (RELEVANT_IFLAG(tty->termios.c_iflag) ==
158 RELEVANT_IFLAG(old_termios->c_iflag)))
159 {
160 return;
161 }
162
163 ircomm_tty_change_speed(self, tty);
164
165 /* Handle transition to B0 status */
166 if ((old_termios->c_cflag & CBAUD) &&
167 !(cflag & CBAUD)) {
168 self->settings.dte &= ~(IRCOMM_DTR|IRCOMM_RTS);
169 ircomm_param_request(self, IRCOMM_DTE, TRUE);
170 }
171
172 /* Handle transition away from B0 status */
173 if (!(old_termios->c_cflag & CBAUD) &&
174 (cflag & CBAUD)) {
175 self->settings.dte |= IRCOMM_DTR;
176 if (!(tty->termios.c_cflag & CRTSCTS) ||
177 !test_bit(TTY_THROTTLED, &tty->flags)) {
178 self->settings.dte |= IRCOMM_RTS;
179 }
180 ircomm_param_request(self, IRCOMM_DTE, TRUE);
181 }
182
183 /* Handle turning off CRTSCTS */
184 if ((old_termios->c_cflag & CRTSCTS) &&
185 !(tty->termios.c_cflag & CRTSCTS))
186 {
187 tty->hw_stopped = 0;
188 ircomm_tty_start(tty);
189 }
190 }
191
192 /*
193 * Function ircomm_tty_tiocmget (tty)
194 *
195 *
196 *
197 */
ircomm_tty_tiocmget(struct tty_struct * tty)198 int ircomm_tty_tiocmget(struct tty_struct *tty)
199 {
200 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
201 unsigned int result;
202
203 IRDA_DEBUG(2, "%s()\n", __func__ );
204
205 if (tty->flags & (1 << TTY_IO_ERROR))
206 return -EIO;
207
208 result = ((self->settings.dte & IRCOMM_RTS) ? TIOCM_RTS : 0)
209 | ((self->settings.dte & IRCOMM_DTR) ? TIOCM_DTR : 0)
210 | ((self->settings.dce & IRCOMM_CD) ? TIOCM_CAR : 0)
211 | ((self->settings.dce & IRCOMM_RI) ? TIOCM_RNG : 0)
212 | ((self->settings.dce & IRCOMM_DSR) ? TIOCM_DSR : 0)
213 | ((self->settings.dce & IRCOMM_CTS) ? TIOCM_CTS : 0);
214 return result;
215 }
216
217 /*
218 * Function ircomm_tty_tiocmset (tty, set, clear)
219 *
220 *
221 *
222 */
ircomm_tty_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)223 int ircomm_tty_tiocmset(struct tty_struct *tty,
224 unsigned int set, unsigned int clear)
225 {
226 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
227
228 IRDA_DEBUG(2, "%s()\n", __func__ );
229
230 if (tty->flags & (1 << TTY_IO_ERROR))
231 return -EIO;
232
233 IRDA_ASSERT(self != NULL, return -1;);
234 IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
235
236 if (set & TIOCM_RTS)
237 self->settings.dte |= IRCOMM_RTS;
238 if (set & TIOCM_DTR)
239 self->settings.dte |= IRCOMM_DTR;
240
241 if (clear & TIOCM_RTS)
242 self->settings.dte &= ~IRCOMM_RTS;
243 if (clear & TIOCM_DTR)
244 self->settings.dte &= ~IRCOMM_DTR;
245
246 if ((set|clear) & TIOCM_RTS)
247 self->settings.dte |= IRCOMM_DELTA_RTS;
248 if ((set|clear) & TIOCM_DTR)
249 self->settings.dte |= IRCOMM_DELTA_DTR;
250
251 ircomm_param_request(self, IRCOMM_DTE, TRUE);
252
253 return 0;
254 }
255
256 /*
257 * Function get_serial_info (driver, retinfo)
258 *
259 *
260 *
261 */
ircomm_tty_get_serial_info(struct ircomm_tty_cb * self,struct serial_struct __user * retinfo)262 static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self,
263 struct serial_struct __user *retinfo)
264 {
265 struct serial_struct info;
266
267 if (!retinfo)
268 return -EFAULT;
269
270 IRDA_DEBUG(2, "%s()\n", __func__ );
271
272 memset(&info, 0, sizeof(info));
273 info.line = self->line;
274 info.flags = self->port.flags;
275 info.baud_base = self->settings.data_rate;
276 info.close_delay = self->port.close_delay;
277 info.closing_wait = self->port.closing_wait;
278
279 /* For compatibility */
280 info.type = PORT_16550A;
281 info.port = 0;
282 info.irq = 0;
283 info.xmit_fifo_size = 0;
284 info.hub6 = 0;
285 info.custom_divisor = 0;
286
287 if (copy_to_user(retinfo, &info, sizeof(*retinfo)))
288 return -EFAULT;
289
290 return 0;
291 }
292
293 /*
294 * Function set_serial_info (driver, new_info)
295 *
296 *
297 *
298 */
ircomm_tty_set_serial_info(struct ircomm_tty_cb * self,struct serial_struct __user * new_info)299 static int ircomm_tty_set_serial_info(struct ircomm_tty_cb *self,
300 struct serial_struct __user *new_info)
301 {
302 #if 0
303 struct serial_struct new_serial;
304 struct ircomm_tty_cb old_state, *state;
305
306 IRDA_DEBUG(0, "%s()\n", __func__ );
307
308 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
309 return -EFAULT;
310
311
312 state = self
313 old_state = *self;
314
315 if (!capable(CAP_SYS_ADMIN)) {
316 if ((new_serial.baud_base != state->settings.data_rate) ||
317 (new_serial.close_delay != state->close_delay) ||
318 ((new_serial.flags & ~ASYNC_USR_MASK) !=
319 (self->flags & ~ASYNC_USR_MASK)))
320 return -EPERM;
321 state->flags = ((state->flags & ~ASYNC_USR_MASK) |
322 (new_serial.flags & ASYNC_USR_MASK));
323 self->flags = ((self->flags & ~ASYNC_USR_MASK) |
324 (new_serial.flags & ASYNC_USR_MASK));
325 /* self->custom_divisor = new_serial.custom_divisor; */
326 goto check_and_exit;
327 }
328
329 /*
330 * OK, past this point, all the error checking has been done.
331 * At this point, we start making changes.....
332 */
333
334 if (self->settings.data_rate != new_serial.baud_base) {
335 self->settings.data_rate = new_serial.baud_base;
336 ircomm_param_request(self, IRCOMM_DATA_RATE, TRUE);
337 }
338
339 self->close_delay = new_serial.close_delay * HZ/100;
340 self->closing_wait = new_serial.closing_wait * HZ/100;
341 /* self->custom_divisor = new_serial.custom_divisor; */
342
343 self->flags = ((self->flags & ~ASYNC_FLAGS) |
344 (new_serial.flags & ASYNC_FLAGS));
345 self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
346
347 check_and_exit:
348
349 if (self->flags & ASYNC_INITIALIZED) {
350 if (((old_state.flags & ASYNC_SPD_MASK) !=
351 (self->flags & ASYNC_SPD_MASK)) ||
352 (old_driver.custom_divisor != driver->custom_divisor)) {
353 if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
354 driver->tty->alt_speed = 57600;
355 if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
356 driver->tty->alt_speed = 115200;
357 if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
358 driver->tty->alt_speed = 230400;
359 if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
360 driver->tty->alt_speed = 460800;
361 ircomm_tty_change_speed(driver);
362 }
363 }
364 #endif
365 return 0;
366 }
367
368 /*
369 * Function ircomm_tty_ioctl (tty, cmd, arg)
370 *
371 *
372 *
373 */
ircomm_tty_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)374 int ircomm_tty_ioctl(struct tty_struct *tty,
375 unsigned int cmd, unsigned long arg)
376 {
377 struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
378 int ret = 0;
379
380 IRDA_DEBUG(2, "%s()\n", __func__ );
381
382 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
383 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
384 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
385 if (tty->flags & (1 << TTY_IO_ERROR))
386 return -EIO;
387 }
388
389 switch (cmd) {
390 case TIOCGSERIAL:
391 ret = ircomm_tty_get_serial_info(self, (struct serial_struct __user *) arg);
392 break;
393 case TIOCSSERIAL:
394 ret = ircomm_tty_set_serial_info(self, (struct serial_struct __user *) arg);
395 break;
396 case TIOCMIWAIT:
397 IRDA_DEBUG(0, "(), TIOCMIWAIT, not impl!\n");
398 break;
399
400 case TIOCGICOUNT:
401 IRDA_DEBUG(0, "%s(), TIOCGICOUNT not impl!\n", __func__ );
402 #if 0
403 save_flags(flags); cli();
404 cnow = driver->icount;
405 restore_flags(flags);
406 p_cuser = (struct serial_icounter_struct __user *) arg;
407 if (put_user(cnow.cts, &p_cuser->cts) ||
408 put_user(cnow.dsr, &p_cuser->dsr) ||
409 put_user(cnow.rng, &p_cuser->rng) ||
410 put_user(cnow.dcd, &p_cuser->dcd) ||
411 put_user(cnow.rx, &p_cuser->rx) ||
412 put_user(cnow.tx, &p_cuser->tx) ||
413 put_user(cnow.frame, &p_cuser->frame) ||
414 put_user(cnow.overrun, &p_cuser->overrun) ||
415 put_user(cnow.parity, &p_cuser->parity) ||
416 put_user(cnow.brk, &p_cuser->brk) ||
417 put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
418 return -EFAULT;
419 #endif
420 return 0;
421 default:
422 ret = -ENOIOCTLCMD; /* ioctls which we must ignore */
423 }
424 return ret;
425 }
426
427
428
429