summaryrefslogtreecommitdiff
path: root/net/irda/ircomm/ircomm_tty_ioctl.c
blob: 197e3e7ed7e2d3aa2b7cbd39034d0744faf9c768 (plain)
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/*********************************************************************
 *                
 * Filename:      ircomm_tty_ioctl.c
 * Version:       
 * Description:   
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Thu Jun 10 14:39:09 1999
 * Modified at:   Wed Jan  5 14:45:43 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * 
 *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
 *     
 *     This program is free software; you can redistribute it and/or 
 *     modify it under the terms of the GNU General Public License as 
 *     published by the Free Software Foundation; either version 2 of 
 *     the License, or (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License 
 *     along with this program; if not, write to the Free Software 
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 *     MA 02111-1307 USA
 *     
 ********************************************************************/

#include <linux/init.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/termios.h>
#include <linux/tty.h>
#include <linux/serial.h>

#include <asm/uaccess.h>

#include <net/irda/irda.h>
#include <net/irda/irmod.h>

#include <net/irda/ircomm_core.h>
#include <net/irda/ircomm_param.h>
#include <net/irda/ircomm_tty_attach.h>
#include <net/irda/ircomm_tty.h>

#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))

/*
 * Function ircomm_tty_change_speed (driver)
 *
 *    Change speed of the driver. If the remote device is a DCE, then this
 *    should make it change the speed of its serial port
 */
static void ircomm_tty_change_speed(struct ircomm_tty_cb *self)
{
	unsigned cflag, cval;
	int baud;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	if (!self->tty || !self->tty->termios || !self->ircomm)
		return;

	cflag = self->tty->termios->c_cflag;

	/*  byte size and parity */
	switch (cflag & CSIZE) {
	case CS5: cval = IRCOMM_WSIZE_5; break;
	case CS6: cval = IRCOMM_WSIZE_6; break;
	case CS7: cval = IRCOMM_WSIZE_7; break;
	case CS8: cval = IRCOMM_WSIZE_8; break;
	default:  cval = IRCOMM_WSIZE_5; break;
	}
	if (cflag & CSTOPB)
		cval |= IRCOMM_2_STOP_BIT;
	
	if (cflag & PARENB)
		cval |= IRCOMM_PARITY_ENABLE;
	if (!(cflag & PARODD))
		cval |= IRCOMM_PARITY_EVEN;

	/* Determine divisor based on baud rate */
	baud = tty_get_baud_rate(self->tty);
	if (!baud)
		baud = 9600;	/* B0 transition handled in rs_set_termios */

	self->settings.data_rate = baud;
	ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE);
	
	/* CTS flow control flag and modem status interrupts */
	if (cflag & CRTSCTS) {
		self->flags |= ASYNC_CTS_FLOW;
		self->settings.flow_control |= IRCOMM_RTS_CTS_IN;
		/* This got me. Bummer. Jean II */
		if (self->service_type == IRCOMM_3_WIRE_RAW)
			IRDA_WARNING("%s(), enabling RTS/CTS on link that doesn't support it (3-wire-raw)\n", __FUNCTION__);
	} else {
		self->flags &= ~ASYNC_CTS_FLOW;
		self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN;
	}
	if (cflag & CLOCAL)
		self->flags &= ~ASYNC_CHECK_CD;
	else
		self->flags |= ASYNC_CHECK_CD;
#if 0	
	/*
	 * Set up parity check flag
	 */

	if (I_INPCK(self->tty))
		driver->read_status_mask |= LSR_FE | LSR_PE;
	if (I_BRKINT(driver->tty) || I_PARMRK(driver->tty))
		driver->read_status_mask |= LSR_BI;
	
	/*
	 * Characters to ignore
	 */
	driver->ignore_status_mask = 0;
	if (I_IGNPAR(driver->tty))
		driver->ignore_status_mask |= LSR_PE | LSR_FE;

	if (I_IGNBRK(self->tty)) {
		self->ignore_status_mask |= LSR_BI;
		/*
		 * If we're ignore parity and break indicators, ignore 
		 * overruns too. (For real raw support).
		 */
		if (I_IGNPAR(self->tty)) 
			self->ignore_status_mask |= LSR_OE;
	}
#endif
	self->settings.data_format = cval;

	ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
 	ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE);
}

/*
 * Function ircomm_tty_set_termios (tty, old_termios)
 *
 *    This routine allows the tty driver to be notified when device's
 *    termios settings have changed.  Note that a well-designed tty driver
 *    should be prepared to accept the case where old == NULL, and try to
 *    do something rational.
 */
void ircomm_tty_set_termios(struct tty_struct *tty, 
			    struct termios *old_termios)
{
	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
	unsigned int cflag = tty->termios->c_cflag;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	if ((cflag == old_termios->c_cflag) && 
	    (RELEVANT_IFLAG(tty->termios->c_iflag) == 
	     RELEVANT_IFLAG(old_termios->c_iflag)))
	{
		return;
	}

	ircomm_tty_change_speed(self);

	/* Handle transition to B0 status */
	if ((old_termios->c_cflag & CBAUD) &&
	    !(cflag & CBAUD)) {
		self->settings.dte &= ~(IRCOMM_DTR|IRCOMM_RTS);
		ircomm_param_request(self, IRCOMM_DTE, TRUE);
	}
	
	/* Handle transition away from B0 status */
	if (!(old_termios->c_cflag & CBAUD) &&
	    (cflag & CBAUD)) {
		self->settings.dte |= IRCOMM_DTR;
		if (!(tty->termios->c_cflag & CRTSCTS) || 
		    !test_bit(TTY_THROTTLED, &tty->flags)) {
			self->settings.dte |= IRCOMM_RTS;
		}
		ircomm_param_request(self, IRCOMM_DTE, TRUE);
	}
	
	/* Handle turning off CRTSCTS */
	if ((old_termios->c_cflag & CRTSCTS) &&
	    !(tty->termios->c_cflag & CRTSCTS)) 
	{
		tty->hw_stopped = 0;
		ircomm_tty_start(tty);
	}
}

/*
 * Function ircomm_tty_tiocmget (tty, file)
 *
 *    
 *
 */
int ircomm_tty_tiocmget(struct tty_struct *tty, struct file *file)
{
	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
	unsigned int result;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	if (tty->flags & (1 << TTY_IO_ERROR))
		return -EIO;

	result =  ((self->settings.dte & IRCOMM_RTS) ? TIOCM_RTS : 0)
		| ((self->settings.dte & IRCOMM_DTR) ? TIOCM_DTR : 0)
		| ((self->settings.dce & IRCOMM_CD)  ? TIOCM_CAR : 0)
		| ((self->settings.dce & IRCOMM_RI)  ? TIOCM_RNG : 0)
		| ((self->settings.dce & IRCOMM_DSR) ? TIOCM_DSR : 0)
		| ((self->settings.dce & IRCOMM_CTS) ? TIOCM_CTS : 0);
	return result;
}

/*
 * Function ircomm_tty_tiocmset (tty, file, set, clear)
 *
 *    
 *
 */
int ircomm_tty_tiocmset(struct tty_struct *tty, struct file *file,
			unsigned int set, unsigned int clear)
{ 
	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	if (tty->flags & (1 << TTY_IO_ERROR))
		return -EIO;

	IRDA_ASSERT(self != NULL, return -1;);
	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);

	if (set & TIOCM_RTS)
		self->settings.dte |= IRCOMM_RTS;
	if (set & TIOCM_DTR)
		self->settings.dte |= IRCOMM_DTR;

	if (clear & TIOCM_RTS)
		self->settings.dte &= ~IRCOMM_RTS;
	if (clear & TIOCM_DTR)
		self->settings.dte &= ~IRCOMM_DTR;

	if ((set|clear) & TIOCM_RTS)
		self->settings.dte |= IRCOMM_DELTA_RTS;
	if ((set|clear) & TIOCM_DTR)
		self->settings.dte |= IRCOMM_DELTA_DTR;

	ircomm_param_request(self, IRCOMM_DTE, TRUE);
	
	return 0;
}

/*
 * Function get_serial_info (driver, retinfo)
 *
 *    
 *
 */
static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self,
				      struct serial_struct __user *retinfo)
{
	struct serial_struct info;
   
	if (!retinfo)
		return -EFAULT;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	memset(&info, 0, sizeof(info));
	info.line = self->line;
	info.flags = self->flags;
	info.baud_base = self->settings.data_rate;
	info.close_delay = self->close_delay;
	info.closing_wait = self->closing_wait;

	/* For compatibility  */
 	info.type = PORT_16550A;
 	info.port = 0;
 	info.irq = 0;
	info.xmit_fifo_size = 0;
	info.hub6 = 0;   
	info.custom_divisor = 0;

	if (copy_to_user(retinfo, &info, sizeof(*retinfo)))
		return -EFAULT;

	return 0;
}

/*
 * Function set_serial_info (driver, new_info)
 *
 *    
 *
 */
static int ircomm_tty_set_serial_info(struct ircomm_tty_cb *self,
				      struct serial_struct __user *new_info)
{
#if 0
	struct serial_struct new_serial;
	struct ircomm_tty_cb old_state, *state;

	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );

	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
		return -EFAULT;


	state = self
	old_state = *self;
  
	if (!capable(CAP_SYS_ADMIN)) {
		if ((new_serial.baud_base != state->settings.data_rate) ||
		    (new_serial.close_delay != state->close_delay) ||
		    ((new_serial.flags & ~ASYNC_USR_MASK) !=
		     (self->flags & ~ASYNC_USR_MASK)))
			return -EPERM;
		state->flags = ((state->flags & ~ASYNC_USR_MASK) |
				 (new_serial.flags & ASYNC_USR_MASK));
		self->flags = ((self->flags & ~ASYNC_USR_MASK) |
			       (new_serial.flags & ASYNC_USR_MASK));
		/* self->custom_divisor = new_serial.custom_divisor; */
		goto check_and_exit;
	}

	/*
	 * OK, past this point, all the error checking has been done.
	 * At this point, we start making changes.....
	 */

	if (self->settings.data_rate != new_serial.baud_base) {
		self->settings.data_rate = new_serial.baud_base;
		ircomm_param_request(self, IRCOMM_DATA_RATE, TRUE);
	}

	self->close_delay = new_serial.close_delay * HZ/100;
	self->closing_wait = new_serial.closing_wait * HZ/100;
	/* self->custom_divisor = new_serial.custom_divisor; */

	self->flags = ((self->flags & ~ASYNC_FLAGS) |
		       (new_serial.flags & ASYNC_FLAGS));
	self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;

 check_and_exit:

	if (self->flags & ASYNC_INITIALIZED) {
		if (((old_state.flags & ASYNC_SPD_MASK) !=
		     (self->flags & ASYNC_SPD_MASK)) ||
		    (old_driver.custom_divisor != driver->custom_divisor)) {
			if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
				driver->tty->alt_speed = 57600;
			if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
				driver->tty->alt_speed = 115200;
			if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
				driver->tty->alt_speed = 230400;
			if ((driver->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
				driver->tty->alt_speed = 460800;
			ircomm_tty_change_speed(driver);
		}
	}
#endif
	return 0;
}

/*
 * Function ircomm_tty_ioctl (tty, file, cmd, arg)
 *
 *    
 *
 */
int ircomm_tty_ioctl(struct tty_struct *tty, struct file *file, 
		     unsigned int cmd, unsigned long arg)
{
	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
	int ret = 0;

	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );

	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
	    (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
		if (tty->flags & (1 << TTY_IO_ERROR))
		    return -EIO;
	}

	switch (cmd) {
	case TIOCGSERIAL:
		ret = ircomm_tty_get_serial_info(self, (struct serial_struct __user *) arg);
		break;
	case TIOCSSERIAL:
		ret = ircomm_tty_set_serial_info(self, (struct serial_struct __user *) arg);
		break;
	case TIOCMIWAIT:
		IRDA_DEBUG(0, "(), TIOCMIWAIT, not impl!\n");
		break;

	case TIOCGICOUNT:
		IRDA_DEBUG(0, "%s(), TIOCGICOUNT not impl!\n", __FUNCTION__ );
#if 0
		save_flags(flags); cli();
		cnow = driver->icount;
		restore_flags(flags);
		p_cuser = (struct serial_icounter_struct __user *) arg;
		if (put_user(cnow.cts, &p_cuser->cts) ||
		    put_user(cnow.dsr, &p_cuser->dsr) ||
		    put_user(cnow.rng, &p_cuser->rng) ||
		    put_user(cnow.dcd, &p_cuser->dcd) ||
		    put_user(cnow.rx, &p_cuser->rx) ||
		    put_user(cnow.tx, &p_cuser->tx) ||
		    put_user(cnow.frame, &p_cuser->frame) ||
		    put_user(cnow.overrun, &p_cuser->overrun) ||
		    put_user(cnow.parity, &p_cuser->parity) ||
		    put_user(cnow.brk, &p_cuser->brk) ||
		    put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
			return -EFAULT;
#endif		
		return 0;
	default:
		ret = -ENOIOCTLCMD;  /* ioctls which we must ignore */
	}
	return ret;
}