1 /*********************************************************************
3 * Filename: ircomm_param.c
5 * Description: Parameter handling for the IrCOMM protocol
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Mon Jun 7 10:25:11 1999
9 * Modified at: Sun Jan 30 14:32:03 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
12 * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
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.
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.
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,
29 ********************************************************************/
31 #include <linux/sched.h>
32 #include <linux/workqueue.h>
33 #include <linux/interrupt.h>
35 #include <net/irda/irda.h>
36 #include <net/irda/parameters.h>
38 #include <net/irda/ircomm_core.h>
39 #include <net/irda/ircomm_tty_attach.h>
40 #include <net/irda/ircomm_tty.h>
42 #include <net/irda/ircomm_param.h>
44 static int ircomm_param_service_type(void *instance
, irda_param_t
*param
,
46 static int ircomm_param_port_type(void *instance
, irda_param_t
*param
,
48 static int ircomm_param_port_name(void *instance
, irda_param_t
*param
,
50 static int ircomm_param_service_type(void *instance
, irda_param_t
*param
,
52 static int ircomm_param_data_rate(void *instance
, irda_param_t
*param
,
54 static int ircomm_param_data_format(void *instance
, irda_param_t
*param
,
56 static int ircomm_param_flow_control(void *instance
, irda_param_t
*param
,
58 static int ircomm_param_xon_xoff(void *instance
, irda_param_t
*param
, int get
);
59 static int ircomm_param_enq_ack(void *instance
, irda_param_t
*param
, int get
);
60 static int ircomm_param_line_status(void *instance
, irda_param_t
*param
,
62 static int ircomm_param_dte(void *instance
, irda_param_t
*param
, int get
);
63 static int ircomm_param_dce(void *instance
, irda_param_t
*param
, int get
);
64 static int ircomm_param_poll(void *instance
, irda_param_t
*param
, int get
);
66 static pi_minor_info_t pi_minor_call_table_common
[] = {
67 { ircomm_param_service_type
, PV_INT_8_BITS
},
68 { ircomm_param_port_type
, PV_INT_8_BITS
},
69 { ircomm_param_port_name
, PV_STRING
}
71 static pi_minor_info_t pi_minor_call_table_non_raw
[] = {
72 { ircomm_param_data_rate
, PV_INT_32_BITS
| PV_BIG_ENDIAN
},
73 { ircomm_param_data_format
, PV_INT_8_BITS
},
74 { ircomm_param_flow_control
, PV_INT_8_BITS
},
75 { ircomm_param_xon_xoff
, PV_INT_16_BITS
},
76 { ircomm_param_enq_ack
, PV_INT_16_BITS
},
77 { ircomm_param_line_status
, PV_INT_8_BITS
}
79 static pi_minor_info_t pi_minor_call_table_9_wire
[] = {
80 { ircomm_param_dte
, PV_INT_8_BITS
},
81 { ircomm_param_dce
, PV_INT_8_BITS
},
82 { ircomm_param_poll
, PV_NO_VALUE
},
85 static pi_major_info_t pi_major_call_table
[] = {
86 { pi_minor_call_table_common
, 3 },
87 { pi_minor_call_table_non_raw
, 6 },
88 { pi_minor_call_table_9_wire
, 3 }
89 /* { pi_minor_call_table_centronics } */
92 pi_param_info_t ircomm_param_info
= { pi_major_call_table
, 3, 0x0f, 4 };
95 * Function ircomm_param_flush (self)
97 * Flush (send) out all queued parameters
100 int ircomm_param_flush(struct ircomm_tty_cb
*self
)
102 /* we should lock here, but I guess this function is unused...
104 if (self
->ctrl_skb
) {
105 ircomm_control_request(self
->ircomm
, self
->ctrl_skb
);
106 self
->ctrl_skb
= NULL
;
112 * Function ircomm_param_request (self, pi, flush)
114 * Queue a parameter for the control channel
117 int ircomm_param_request(struct ircomm_tty_cb
*self
, __u8 pi
, int flush
)
119 struct tty_struct
*tty
;
124 IRDA_DEBUG(2, "%s()\n", __FUNCTION__
);
126 ASSERT(self
!= NULL
, return -1;);
127 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
133 /* Make sure we don't send parameters for raw mode */
134 if (self
->service_type
== IRCOMM_3_WIRE_RAW
)
137 spin_lock_irqsave(&self
->spinlock
, flags
);
139 skb
= self
->ctrl_skb
;
141 skb
= dev_alloc_skb(256);
143 spin_unlock_irqrestore(&self
->spinlock
, flags
);
147 skb_reserve(skb
, self
->max_header_size
);
148 self
->ctrl_skb
= skb
;
151 * Inserting is a little bit tricky since we don't know how much
152 * room we will need. But this should hopefully work OK
154 count
= irda_param_insert(self
, pi
, skb
->tail
, skb_tailroom(skb
),
157 WARNING("%s(), no room for parameter!\n", __FUNCTION__
);
158 spin_unlock_irqrestore(&self
->spinlock
, flags
);
163 spin_unlock_irqrestore(&self
->spinlock
, flags
);
165 IRDA_DEBUG(2, "%s(), skb->len=%d\n", __FUNCTION__
, skb
->len
);
168 /* ircomm_tty_do_softint will take care of the rest */
169 schedule_work(&self
->tqueue
);
176 * Function ircomm_param_service_type (self, buf, len)
178 * Handle service type, this function will both be called after the LM-IAS
179 * query and then the remote device sends its initial parameters
182 static int ircomm_param_service_type(void *instance
, irda_param_t
*param
,
185 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
186 __u8 service_type
= (__u8
) param
->pv
.i
;
188 ASSERT(self
!= NULL
, return -1;);
189 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
192 param
->pv
.i
= self
->settings
.service_type
;
196 /* Find all common service types */
197 service_type
&= self
->service_type
;
200 "%s(), No common service type to use!\n", __FUNCTION__
);
203 IRDA_DEBUG(0, "%s(), services in common=%02x\n", __FUNCTION__
,
207 * Now choose a preferred service type of those available
209 if (service_type
& IRCOMM_CENTRONICS
)
210 self
->settings
.service_type
= IRCOMM_CENTRONICS
;
211 else if (service_type
& IRCOMM_9_WIRE
)
212 self
->settings
.service_type
= IRCOMM_9_WIRE
;
213 else if (service_type
& IRCOMM_3_WIRE
)
214 self
->settings
.service_type
= IRCOMM_3_WIRE
;
215 else if (service_type
& IRCOMM_3_WIRE_RAW
)
216 self
->settings
.service_type
= IRCOMM_3_WIRE_RAW
;
218 IRDA_DEBUG(0, "%s(), resulting service type=0x%02x\n", __FUNCTION__
,
219 self
->settings
.service_type
);
222 * Now the line is ready for some communication. Check if we are a
223 * server, and send over some initial parameters.
224 * Client do it in ircomm_tty_state_setup().
225 * Note : we may get called from ircomm_tty_getvalue_confirm(),
226 * therefore before we even have open any socket. And self->client
227 * is initialised to TRUE only later. So, we check if the link is
228 * really initialised. - Jean II
230 if ((self
->max_header_size
!= IRCOMM_TTY_HDR_UNINITIALISED
) &&
232 (self
->settings
.service_type
!= IRCOMM_3_WIRE_RAW
))
234 /* Init connection */
235 ircomm_tty_send_initial_parameters(self
);
236 ircomm_tty_link_established(self
);
243 * Function ircomm_param_port_type (self, param)
245 * The port type parameter tells if the devices are serial or parallel.
246 * Since we only advertise serial service, this parameter should only
247 * be equal to IRCOMM_SERIAL.
249 static int ircomm_param_port_type(void *instance
, irda_param_t
*param
, int get
)
251 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
253 ASSERT(self
!= NULL
, return -1;);
254 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
257 param
->pv
.i
= IRCOMM_SERIAL
;
259 self
->settings
.port_type
= (__u8
) param
->pv
.i
;
261 IRDA_DEBUG(0, "%s(), port type=%d\n", __FUNCTION__
,
262 self
->settings
.port_type
);
268 * Function ircomm_param_port_name (self, param)
273 static int ircomm_param_port_name(void *instance
, irda_param_t
*param
, int get
)
275 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
277 ASSERT(self
!= NULL
, return -1;);
278 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
281 IRDA_DEBUG(0, "%s(), not imp!\n", __FUNCTION__
);
283 IRDA_DEBUG(0, "%s(), port-name=%s\n", __FUNCTION__
, param
->pv
.c
);
284 strncpy(self
->settings
.port_name
, param
->pv
.c
, 32);
291 * Function ircomm_param_data_rate (self, param)
293 * Exchange data rate to be used in this settings
296 static int ircomm_param_data_rate(void *instance
, irda_param_t
*param
, int get
)
298 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
300 ASSERT(self
!= NULL
, return -1;);
301 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
304 param
->pv
.i
= self
->settings
.data_rate
;
306 self
->settings
.data_rate
= param
->pv
.i
;
308 IRDA_DEBUG(2, "%s(), data rate = %d\n", __FUNCTION__
, param
->pv
.i
);
314 * Function ircomm_param_data_format (self, param)
316 * Exchange data format to be used in this settings
319 static int ircomm_param_data_format(void *instance
, irda_param_t
*param
,
322 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
324 ASSERT(self
!= NULL
, return -1;);
325 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
328 param
->pv
.i
= self
->settings
.data_format
;
330 self
->settings
.data_format
= (__u8
) param
->pv
.i
;
336 * Function ircomm_param_flow_control (self, param)
338 * Exchange flow control settings to be used in this settings
341 static int ircomm_param_flow_control(void *instance
, irda_param_t
*param
,
344 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
346 ASSERT(self
!= NULL
, return -1;);
347 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
350 param
->pv
.i
= self
->settings
.flow_control
;
352 self
->settings
.flow_control
= (__u8
) param
->pv
.i
;
354 IRDA_DEBUG(1, "%s(), flow control = 0x%02x\n", __FUNCTION__
, (__u8
) param
->pv
.i
);
360 * Function ircomm_param_xon_xoff (self, param)
362 * Exchange XON/XOFF characters
365 static int ircomm_param_xon_xoff(void *instance
, irda_param_t
*param
, int get
)
367 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
369 ASSERT(self
!= NULL
, return -1;);
370 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
373 param
->pv
.i
= self
->settings
.xonxoff
[0];
374 param
->pv
.i
|= self
->settings
.xonxoff
[1] << 8;
376 self
->settings
.xonxoff
[0] = (__u16
) param
->pv
.i
& 0xff;
377 self
->settings
.xonxoff
[1] = (__u16
) param
->pv
.i
>> 8;
380 IRDA_DEBUG(0, "%s(), XON/XOFF = 0x%02x,0x%02x\n", __FUNCTION__
,
381 param
->pv
.i
& 0xff, param
->pv
.i
>> 8);
387 * Function ircomm_param_enq_ack (self, param)
389 * Exchange ENQ/ACK characters
392 static int ircomm_param_enq_ack(void *instance
, irda_param_t
*param
, int get
)
394 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
396 ASSERT(self
!= NULL
, return -1;);
397 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
400 param
->pv
.i
= self
->settings
.enqack
[0];
401 param
->pv
.i
|= self
->settings
.enqack
[1] << 8;
403 self
->settings
.enqack
[0] = (__u16
) param
->pv
.i
& 0xff;
404 self
->settings
.enqack
[1] = (__u16
) param
->pv
.i
>> 8;
407 IRDA_DEBUG(0, "%s(), ENQ/ACK = 0x%02x,0x%02x\n", __FUNCTION__
,
408 param
->pv
.i
& 0xff, param
->pv
.i
>> 8);
414 * Function ircomm_param_line_status (self, param)
419 static int ircomm_param_line_status(void *instance
, irda_param_t
*param
,
422 IRDA_DEBUG(2, "%s(), not impl.\n", __FUNCTION__
);
428 * Function ircomm_param_dte (instance, param)
430 * If we get here, there must be some sort of null-modem connection, and
431 * we are probably working in server mode as well.
433 static int ircomm_param_dte(void *instance
, irda_param_t
*param
, int get
)
435 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
438 ASSERT(self
!= NULL
, return -1;);
439 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
442 param
->pv
.i
= self
->settings
.dte
;
444 dte
= (__u8
) param
->pv
.i
;
446 self
->settings
.dce
= 0;
448 if (dte
& IRCOMM_DELTA_DTR
)
449 self
->settings
.dce
|= (IRCOMM_DELTA_DSR
|
452 if (dte
& IRCOMM_DTR
)
453 self
->settings
.dce
|= (IRCOMM_DSR
|
457 if (dte
& IRCOMM_DELTA_RTS
)
458 self
->settings
.dce
|= IRCOMM_DELTA_CTS
;
459 if (dte
& IRCOMM_RTS
)
460 self
->settings
.dce
|= IRCOMM_CTS
;
462 /* Take appropriate actions */
463 ircomm_tty_check_modem_status(self
);
465 /* Null modem cable emulator */
466 self
->settings
.null_modem
= TRUE
;
473 * Function ircomm_param_dce (instance, param)
478 static int ircomm_param_dce(void *instance
, irda_param_t
*param
, int get
)
480 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
483 IRDA_DEBUG(1, "%s(), dce = 0x%02x\n", __FUNCTION__
, (__u8
) param
->pv
.i
);
485 dce
= (__u8
) param
->pv
.i
;
487 ASSERT(self
!= NULL
, return -1;);
488 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
490 self
->settings
.dce
= dce
;
492 /* Check if any of the settings have changed */
494 if (dce
& IRCOMM_DELTA_CTS
) {
495 IRDA_DEBUG(2, "%s(), CTS \n", __FUNCTION__
);
499 ircomm_tty_check_modem_status(self
);
505 * Function ircomm_param_poll (instance, param)
507 * Called when the peer device is polling for the line settings
510 static int ircomm_param_poll(void *instance
, irda_param_t
*param
, int get
)
512 struct ircomm_tty_cb
*self
= (struct ircomm_tty_cb
*) instance
;
514 ASSERT(self
!= NULL
, return -1;);
515 ASSERT(self
->magic
== IRCOMM_TTY_MAGIC
, return -1;);
517 /* Poll parameters are always of lenght 0 (just a signal) */
519 /* Respond with DTE line settings */
520 ircomm_param_request(self
, IRCOMM_DTE
, TRUE
);