Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1006 insertions, 0 deletions

diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c
new file mode 100644
index 000000000000..99f5eddbb4b7
--- /dev/null
+++ b/net/irda/ircomm/ircomm_tty_attach.c
@@ -0,0 +1,1006 @@
+/*********************************************************************
+ *                
+ * Filename:      ircomm_tty_attach.c
+ * Version:       
+ * Description:   Code for attaching the serial driver to IrCOMM
+ * Status:        Experimental.
+ * Author:        Dag Brattli <dagb@cs.uit.no>
+ * Created at:    Sat Jun  5 17:42:00 1999
+ * Modified at:   Tue Jan  4 14:20:49 2000
+ * Modified by:   Dag Brattli <dagb@cs.uit.no>
+ * 
+ *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
+ *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
+ *     
+ *     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/sched.h>
+#include <linux/init.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/irlmp.h>
+#include <net/irda/iriap.h>
+#include <net/irda/irttp.h>
+#include <net/irda/irias_object.h>
+#include <net/irda/parameters.h>
+
+#include <net/irda/ircomm_core.h>
+#include <net/irda/ircomm_param.h>
+#include <net/irda/ircomm_event.h>
+
+#include <net/irda/ircomm_tty.h>
+#include <net/irda/ircomm_tty_attach.h>
+
+static void ircomm_tty_ias_register(struct ircomm_tty_cb *self);
+static void ircomm_tty_discovery_indication(discinfo_t *discovery,
+					    DISCOVERY_MODE mode,
+					    void *priv);
+static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id, 
+					struct ias_value *value, void *priv);
+static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self,
+					    int timeout);
+static void ircomm_tty_watchdog_timer_expired(void *data);
+
+static int ircomm_tty_state_idle(struct ircomm_tty_cb *self, 
+				 IRCOMM_TTY_EVENT event, 
+				 struct sk_buff *skb, 
+				 struct ircomm_tty_info *info);
+static int ircomm_tty_state_search(struct ircomm_tty_cb *self, 
+				   IRCOMM_TTY_EVENT event, 
+				   struct sk_buff *skb, 
+				   struct ircomm_tty_info *info);
+static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self, 
+					     IRCOMM_TTY_EVENT event, 
+					     struct sk_buff *skb, 
+					     struct ircomm_tty_info *info);
+static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self, 
+					   IRCOMM_TTY_EVENT event, 
+					   struct sk_buff *skb, 
+					   struct ircomm_tty_info *info);
+static int ircomm_tty_state_setup(struct ircomm_tty_cb *self, 
+				  IRCOMM_TTY_EVENT event, 
+				  struct sk_buff *skb, 
+				  struct ircomm_tty_info *info);
+static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, 
+				  IRCOMM_TTY_EVENT event, 
+				  struct sk_buff *skb, 
+				  struct ircomm_tty_info *info);
+
+char *ircomm_tty_state[] = {
+	"IRCOMM_TTY_IDLE",
+	"IRCOMM_TTY_SEARCH",
+	"IRCOMM_TTY_QUERY_PARAMETERS",
+	"IRCOMM_TTY_QUERY_LSAP_SEL",
+	"IRCOMM_TTY_SETUP",
+	"IRCOMM_TTY_READY",
+	"*** ERROR *** ",
+};
+
+#ifdef CONFIG_IRDA_DEBUG
+static char *ircomm_tty_event[] = {
+	"IRCOMM_TTY_ATTACH_CABLE",
+	"IRCOMM_TTY_DETACH_CABLE",
+	"IRCOMM_TTY_DATA_REQUEST",
+	"IRCOMM_TTY_DATA_INDICATION",
+	"IRCOMM_TTY_DISCOVERY_REQUEST",
+	"IRCOMM_TTY_DISCOVERY_INDICATION",
+	"IRCOMM_TTY_CONNECT_CONFIRM",
+	"IRCOMM_TTY_CONNECT_INDICATION",
+	"IRCOMM_TTY_DISCONNECT_REQUEST",
+	"IRCOMM_TTY_DISCONNECT_INDICATION",
+	"IRCOMM_TTY_WD_TIMER_EXPIRED",
+	"IRCOMM_TTY_GOT_PARAMETERS",
+	"IRCOMM_TTY_GOT_LSAPSEL",
+	"*** ERROR ****",
+};
+#endif /* CONFIG_IRDA_DEBUG */
+
+static int (*state[])(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event,
+		      struct sk_buff *skb, struct ircomm_tty_info *info) = 
+{
+	ircomm_tty_state_idle,
+	ircomm_tty_state_search,
+	ircomm_tty_state_query_parameters,
+	ircomm_tty_state_query_lsap_sel,
+	ircomm_tty_state_setup,
+	ircomm_tty_state_ready,
+};
+
+/*
+ * Function ircomm_tty_attach_cable (driver)
+ *
+ *    Try to attach cable (IrCOMM link). This function will only return
+ *    when the link has been connected, or if an error condition occurs. 
+ *    If success, the return value is the resulting service type.
+ */
+int ircomm_tty_attach_cable(struct ircomm_tty_cb *self)
+{
+	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+       	/* Check if somebody has already connected to us */
+	if (ircomm_is_connected(self->ircomm)) {
+		IRDA_DEBUG(0, "%s(), already connected!\n", __FUNCTION__ );
+		return 0;
+	}
+
+	/* Make sure nobody tries to write before the link is up */
+	self->tty->hw_stopped = 1;
+
+	ircomm_tty_ias_register(self);
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_ATTACH_CABLE, NULL, NULL);
+
+	return 0;
+}
+
+/*
+ * Function ircomm_detach_cable (driver)
+ *
+ *    Detach cable, or cable has been detached by peer
+ *
+ */
+void ircomm_tty_detach_cable(struct ircomm_tty_cb *self)
+{
+	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	del_timer(&self->watchdog_timer);
+
+	/* Remove discovery handler */
+	if (self->ckey) {
+		irlmp_unregister_client(self->ckey);
+		self->ckey = NULL;
+	}
+	/* Remove IrCOMM hint bits */
+	if (self->skey) {
+		irlmp_unregister_service(self->skey);
+		self->skey = NULL;
+	}
+
+	if (self->iriap) { 
+		iriap_close(self->iriap);
+		self->iriap = NULL;
+	}
+
+	/* Remove LM-IAS object */
+	if (self->obj) {
+		irias_delete_object(self->obj);
+		self->obj = NULL;
+	}
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_DETACH_CABLE, NULL, NULL);
+
+	/* Reset some values */
+	self->daddr = self->saddr = 0;
+	self->dlsap_sel = self->slsap_sel = 0;
+
+	memset(&self->settings, 0, sizeof(struct ircomm_params));
+}
+
+/*
+ * Function ircomm_tty_ias_register (self)
+ *
+ *    Register with LM-IAS depending on which service type we are
+ *
+ */
+static void ircomm_tty_ias_register(struct ircomm_tty_cb *self)
+{
+	__u8 oct_seq[6];
+	__u16 hints;
+
+	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+	
+	/* Compute hint bits based on service */
+	hints = irlmp_service_to_hint(S_COMM);
+	if (self->service_type & IRCOMM_3_WIRE_RAW)
+		hints |= irlmp_service_to_hint(S_PRINTER);
+
+	/* Advertise IrCOMM hint bit in discovery */
+	if (!self->skey)
+		self->skey = irlmp_register_service(hints);
+	/* Set up a discovery handler */
+	if (!self->ckey)
+		self->ckey = irlmp_register_client(hints,
+						   ircomm_tty_discovery_indication,
+						   NULL, (void *) self);
+
+	/* If already done, no need to do it again */
+	if (self->obj)
+		return;
+
+	if (self->service_type & IRCOMM_3_WIRE_RAW) {
+		/* Register IrLPT with LM-IAS */
+		self->obj = irias_new_object("IrLPT", IAS_IRLPT_ID);
+		irias_add_integer_attrib(self->obj, "IrDA:IrLMP:LsapSel", 
+					 self->slsap_sel, IAS_KERNEL_ATTR);
+	} else {
+		/* Register IrCOMM with LM-IAS */
+		self->obj = irias_new_object("IrDA:IrCOMM", IAS_IRCOMM_ID);
+		irias_add_integer_attrib(self->obj, "IrDA:TinyTP:LsapSel", 
+					 self->slsap_sel, IAS_KERNEL_ATTR);
+		
+		/* Code the parameters into the buffer */
+		irda_param_pack(oct_seq, "bbbbbb", 
+				IRCOMM_SERVICE_TYPE, 1, self->service_type,
+				IRCOMM_PORT_TYPE,    1, IRCOMM_SERIAL);
+		
+		/* Register parameters with LM-IAS */
+		irias_add_octseq_attrib(self->obj, "Parameters", oct_seq, 6,
+					IAS_KERNEL_ATTR);
+	}
+	irias_insert_object(self->obj);
+}
+
+/*
+ * Function ircomm_tty_ias_unregister (self)
+ *
+ *    Remove our IAS object and client hook while connected.
+ *
+ */
+static void ircomm_tty_ias_unregister(struct ircomm_tty_cb *self)
+{
+	/* Remove LM-IAS object now so it is not reused.
+	 * IrCOMM deals very poorly with multiple incoming connections.
+	 * It should looks a lot more like IrNET, and "dup" a server TSAP
+	 * to the application TSAP (based on various rules).
+	 * This is a cheap workaround allowing multiple clients to
+	 * connect to us. It will not always work.
+	 * Each IrCOMM socket has an IAS entry. Incoming connection will
+	 * pick the first one found. So, when we are fully connected,
+	 * we remove our IAS entries so that the next IAS entry is used.
+	 * We do that for *both* client and server, because a server
+	 * can also create client instances.
+	 * Jean II */
+	if (self->obj) {
+		irias_delete_object(self->obj);
+		self->obj = NULL;
+	}
+
+#if 0
+	/* Remove discovery handler.
+	 * While we are connected, we no longer need to receive
+	 * discovery events. This would be the case if there is
+	 * multiple IrLAP interfaces. Jean II */
+	if (self->ckey) {
+		irlmp_unregister_client(self->ckey);
+		self->ckey = NULL;
+	}
+#endif
+}
+
+/*
+ * Function ircomm_send_initial_parameters (self)
+ *
+ *    Send initial parameters to the remote IrCOMM device. These parameters
+ *    must be sent before any data.
+ */
+int ircomm_tty_send_initial_parameters(struct ircomm_tty_cb *self)
+{
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	if (self->service_type & IRCOMM_3_WIRE_RAW) 
+		return 0;
+
+	/* 
+	 * Set default values, but only if the application for some reason 
+	 * haven't set them already
+	 */
+	IRDA_DEBUG(2, "%s(), data-rate = %d\n", __FUNCTION__ , 
+		   self->settings.data_rate);
+	if (!self->settings.data_rate)
+		self->settings.data_rate = 9600;
+	IRDA_DEBUG(2, "%s(), data-format = %d\n", __FUNCTION__ , 
+		   self->settings.data_format);
+	if (!self->settings.data_format)
+		self->settings.data_format = IRCOMM_WSIZE_8;  /* 8N1 */
+
+	IRDA_DEBUG(2, "%s(), flow-control = %d\n", __FUNCTION__ , 
+		   self->settings.flow_control);
+	/*self->settings.flow_control = IRCOMM_RTS_CTS_IN|IRCOMM_RTS_CTS_OUT;*/
+
+	/* Do not set delta values for the initial parameters */
+	self->settings.dte = IRCOMM_DTR | IRCOMM_RTS;
+
+	/* Only send service type parameter when we are the client */
+	if (self->client)
+		ircomm_param_request(self, IRCOMM_SERVICE_TYPE, FALSE);
+	ircomm_param_request(self, IRCOMM_DATA_RATE, FALSE);
+	ircomm_param_request(self, IRCOMM_DATA_FORMAT, FALSE);
+	
+	/* For a 3 wire service, we just flush the last parameter and return */
+	if (self->settings.service_type == IRCOMM_3_WIRE) {
+		ircomm_param_request(self, IRCOMM_FLOW_CONTROL, TRUE);
+		return 0;
+	}
+
+	/* Only 9-wire service types continue here */
+	ircomm_param_request(self, IRCOMM_FLOW_CONTROL, FALSE);
+#if 0
+	ircomm_param_request(self, IRCOMM_XON_XOFF, FALSE);
+	ircomm_param_request(self, IRCOMM_ENQ_ACK, FALSE);
+#endif	
+	/* Notify peer that we are ready to receive data */
+	ircomm_param_request(self, IRCOMM_DTE, TRUE);
+	
+	return 0;
+}
+
+/*
+ * Function ircomm_tty_discovery_indication (discovery)
+ *
+ *    Remote device is discovered, try query the remote IAS to see which
+ *    device it is, and which services it has.
+ *
+ */
+static void ircomm_tty_discovery_indication(discinfo_t *discovery,
+					    DISCOVERY_MODE mode,
+					    void *priv)
+{
+	struct ircomm_tty_cb *self;
+	struct ircomm_tty_info info;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	/* Important note :
+	 * We need to drop all passive discoveries.
+	 * The LSAP management of IrComm is deficient and doesn't deal
+	 * with the case of two instance connecting to each other
+	 * simultaneously (it will deadlock in LMP).
+	 * The proper fix would be to use the same technique as in IrNET,
+	 * to have one server socket and separate instances for the
+	 * connecting/connected socket.
+	 * The workaround is to drop passive discovery, which drastically
+	 * reduce the probability of this happening.
+	 * Jean II */
+	if(mode == DISCOVERY_PASSIVE)
+		return;
+
+	info.daddr = discovery->daddr;
+	info.saddr = discovery->saddr;
+
+	/* FIXME. We have a locking problem on the hashbin here.
+	 * We probably need to use hashbin_find_next(), but we first
+	 * need to ensure that "line" is unique. - Jean II */
+	self = (struct ircomm_tty_cb *) hashbin_get_first(ircomm_tty);
+	while (self != NULL) {
+		IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+		
+		ircomm_tty_do_event(self, IRCOMM_TTY_DISCOVERY_INDICATION, 
+				    NULL, &info);
+
+		self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
+	}
+}
+
+/*
+ * Function ircomm_tty_disconnect_indication (instance, sap, reason, skb)
+ *
+ *    Link disconnected
+ *
+ */
+void ircomm_tty_disconnect_indication(void *instance, void *sap, 
+				      LM_REASON reason,
+				      struct sk_buff *skb)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	if (!self->tty)
+		return;
+
+	/* This will stop control data transfers */
+	self->flow = FLOW_STOP;
+
+	/* Stop data transfers */
+	self->tty->hw_stopped = 1;
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL, 
+			    NULL);
+}
+
+/*
+ * Function ircomm_tty_getvalue_confirm (result, obj_id, value, priv)
+ *
+ *    Got result from the IAS query we make
+ *
+ */
+static void ircomm_tty_getvalue_confirm(int result, __u16 obj_id, 
+					struct ias_value *value, 
+					void *priv)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) priv;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	/* We probably don't need to make any more queries */
+	iriap_close(self->iriap);
+	self->iriap = NULL;
+
+	/* Check if request succeeded */
+	if (result != IAS_SUCCESS) {
+		IRDA_DEBUG(4, "%s(), got NULL value!\n", __FUNCTION__ );
+		return;
+	}
+
+	switch (value->type) {
+ 	case IAS_OCT_SEQ:
+		IRDA_DEBUG(2, "%s(), got octet sequence\n", __FUNCTION__ );
+
+		irda_param_extract_all(self, value->t.oct_seq, value->len,
+				       &ircomm_param_info);
+
+		ircomm_tty_do_event(self, IRCOMM_TTY_GOT_PARAMETERS, NULL, 
+				    NULL);
+		break;
+	case IAS_INTEGER:
+		/* Got LSAP selector */	
+		IRDA_DEBUG(2, "%s(), got lsapsel = %d\n", __FUNCTION__ , 
+			   value->t.integer);
+
+		if (value->t.integer == -1) {
+			IRDA_DEBUG(0, "%s(), invalid value!\n", __FUNCTION__ );
+		} else
+			self->dlsap_sel = value->t.integer;
+
+		ircomm_tty_do_event(self, IRCOMM_TTY_GOT_LSAPSEL, NULL, NULL);
+		break;
+	case IAS_MISSING:
+		IRDA_DEBUG(0, "%s(), got IAS_MISSING\n", __FUNCTION__ );
+		break;
+	default:
+		IRDA_DEBUG(0, "%s(), got unknown type!\n", __FUNCTION__ );
+		break;
+	}
+	irias_delete_value(value);
+}
+
+/*
+ * Function ircomm_tty_connect_confirm (instance, sap, qos, max_sdu_size, skb)
+ *
+ *    Connection confirmed
+ *
+ */
+void ircomm_tty_connect_confirm(void *instance, void *sap, 
+				struct qos_info *qos, 
+				__u32 max_data_size, 
+				__u8 max_header_size, 
+				struct sk_buff *skb)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	self->client = TRUE;
+	self->max_data_size = max_data_size;
+	self->max_header_size = max_header_size;
+	self->flow = FLOW_START;
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_CONFIRM, NULL, NULL);
+
+	/* No need to kfree_skb - see ircomm_ttp_connect_confirm() */
+}
+
+/*
+ * Function ircomm_tty_connect_indication (instance, sap, qos, max_sdu_size, 
+ *                                         skb)
+ *
+ *    we are discovered and being requested to connect by remote device !
+ *
+ */
+void ircomm_tty_connect_indication(void *instance, void *sap, 
+				   struct qos_info *qos, 
+				   __u32 max_data_size,
+				   __u8 max_header_size, 
+				   struct sk_buff *skb)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	int clen;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	self->client = FALSE;
+	self->max_data_size = max_data_size;
+	self->max_header_size = max_header_size;
+	self->flow = FLOW_START;
+
+	clen = skb->data[0];
+	if (clen)
+		irda_param_extract_all(self, skb->data+1, 
+				       IRDA_MIN(skb->len, clen), 
+				       &ircomm_param_info);
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_CONNECT_INDICATION, NULL, NULL);
+
+	/* No need to kfree_skb - see ircomm_ttp_connect_indication() */
+}
+
+/*
+ * Function ircomm_tty_link_established (self)
+ *
+ *    Called when the IrCOMM link is established
+ *
+ */
+void ircomm_tty_link_established(struct ircomm_tty_cb *self)
+{
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	if (!self->tty)
+		return;
+	
+	del_timer(&self->watchdog_timer);
+
+	/* 
+	 * IrCOMM link is now up, and if we are not using hardware
+	 * flow-control, then declare the hardware as running. Otherwise we
+	 * will have to wait for the peer device (DCE) to raise the CTS
+	 * line.  
+	 */
+	if ((self->flags & ASYNC_CTS_FLOW) && ((self->settings.dce & IRCOMM_CTS) == 0)) {
+		IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __FUNCTION__ );
+		return;
+	} else {
+		IRDA_DEBUG(1, "%s(), starting hardware!\n", __FUNCTION__ );
+
+		self->tty->hw_stopped = 0;
+	
+		/* Wake up processes blocked on open */
+		wake_up_interruptible(&self->open_wait);
+	}
+
+	schedule_work(&self->tqueue);
+}
+
+/*
+ * Function ircomm_tty_start_watchdog_timer (self, timeout)
+ *
+ *    Start the watchdog timer. This timer is used to make sure that any 
+ *    connection attempt is successful, and if not, we will retry after 
+ *    the timeout
+ */
+static void ircomm_tty_start_watchdog_timer(struct ircomm_tty_cb *self,
+					    int timeout)
+{
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
+			 ircomm_tty_watchdog_timer_expired);
+}
+
+/*
+ * Function ircomm_tty_watchdog_timer_expired (data)
+ *
+ *    Called when the connect procedure have taken to much time.
+ *
+ */
+static void ircomm_tty_watchdog_timer_expired(void *data)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) data;
+	
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	ircomm_tty_do_event(self, IRCOMM_TTY_WD_TIMER_EXPIRED, NULL, NULL);
+}
+
+
+/*
+ * Function ircomm_tty_do_event (self, event, skb)
+ *
+ *    Process event
+ *
+ */
+int ircomm_tty_do_event(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event,
+			struct sk_buff *skb, struct ircomm_tty_info *info) 
+{
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+	
+	return (*state[self->state])(self, event, skb, info);
+}
+
+/*
+ * Function ircomm_tty_next_state (self, state)
+ *
+ *    Switch state
+ *
+ */
+static inline void ircomm_tty_next_state(struct ircomm_tty_cb *self, IRCOMM_TTY_STATE state)
+{
+	/*
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	IRDA_DEBUG(2, "%s: next state=%s, service type=%d\n", __FUNCTION__ , 
+		   ircomm_tty_state[self->state], self->service_type);
+	*/
+	self->state = state;
+}
+
+/*
+ * Function ircomm_tty_state_idle (self, event, skb, info)
+ *
+ *    Just hanging around
+ *
+ */
+static int ircomm_tty_state_idle(struct ircomm_tty_cb *self, 
+				 IRCOMM_TTY_EVENT event, 
+				 struct sk_buff *skb, 
+				 struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+	switch (event) {
+	case IRCOMM_TTY_ATTACH_CABLE:
+		/* Try to discover any remote devices */		
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
+		
+		irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
+		break;
+	case IRCOMM_TTY_DISCOVERY_INDICATION:
+		self->daddr = info->daddr;
+		self->saddr = info->saddr;
+
+		if (self->iriap) {
+			IRDA_WARNING("%s(), busy with a previous query\n",
+				     __FUNCTION__);
+			return -EBUSY;
+		}
+
+		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
+					 ircomm_tty_getvalue_confirm);
+
+		iriap_getvaluebyclass_request(self->iriap,
+					      self->saddr, self->daddr,
+					      "IrDA:IrCOMM", "Parameters");
+		
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS);
+		break;
+	case IRCOMM_TTY_CONNECT_INDICATION:
+		del_timer(&self->watchdog_timer);
+
+		/* Accept connection */
+		ircomm_connect_response(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_WD_TIMER_EXPIRED:
+		/* Just stay idle */
+		break;
+	case IRCOMM_TTY_DETACH_CABLE:
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_tty_state_search (self, event, skb, info)
+ *
+ *    Trying to discover an IrCOMM device
+ *
+ */
+static int ircomm_tty_state_search(struct ircomm_tty_cb *self, 
+				   IRCOMM_TTY_EVENT event, 
+				   struct sk_buff *skb, 
+				   struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+
+	switch (event) {
+	case IRCOMM_TTY_DISCOVERY_INDICATION:
+		self->daddr = info->daddr;
+		self->saddr = info->saddr;
+
+		if (self->iriap) {
+			IRDA_WARNING("%s(), busy with a previous query\n",
+				     __FUNCTION__);
+			return -EBUSY;
+		}
+		
+		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
+					 ircomm_tty_getvalue_confirm);
+		
+		if (self->service_type == IRCOMM_3_WIRE_RAW) {
+			iriap_getvaluebyclass_request(self->iriap, self->saddr,
+						      self->daddr, "IrLPT", 
+						      "IrDA:IrLMP:LsapSel");
+			ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL);
+		} else {
+			iriap_getvaluebyclass_request(self->iriap, self->saddr,
+						      self->daddr, 
+						      "IrDA:IrCOMM", 
+						      "Parameters");
+
+			ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_PARAMETERS);
+		}
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		break;
+	case IRCOMM_TTY_CONNECT_INDICATION:
+		del_timer(&self->watchdog_timer);
+		ircomm_tty_ias_unregister(self);
+
+		/* Accept connection */
+		ircomm_connect_response(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_WD_TIMER_EXPIRED:
+#if 1
+		/* Give up */
+#else
+		/* Try to discover any remote devices */		
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		irlmp_discovery_request(DISCOVERY_DEFAULT_SLOTS);
+#endif
+		break;
+	case IRCOMM_TTY_DETACH_CABLE:
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_tty_state_query (self, event, skb, info)
+ *
+ *    Querying the remote LM-IAS for IrCOMM parameters
+ *
+ */
+static int ircomm_tty_state_query_parameters(struct ircomm_tty_cb *self, 
+					     IRCOMM_TTY_EVENT event, 
+					     struct sk_buff *skb, 
+					     struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+
+	switch (event) {
+	case IRCOMM_TTY_GOT_PARAMETERS:
+		if (self->iriap) {
+			IRDA_WARNING("%s(), busy with a previous query\n",
+				     __FUNCTION__);
+			return -EBUSY;
+		}
+		
+		self->iriap = iriap_open(LSAP_ANY, IAS_CLIENT, self,
+					 ircomm_tty_getvalue_confirm);
+
+		iriap_getvaluebyclass_request(self->iriap, self->saddr, 
+					      self->daddr, "IrDA:IrCOMM", 
+					      "IrDA:TinyTP:LsapSel");
+
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		ircomm_tty_next_state(self, IRCOMM_TTY_QUERY_LSAP_SEL);
+		break;
+	case IRCOMM_TTY_WD_TIMER_EXPIRED:
+		/* Go back to search mode */
+		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
+		ircomm_tty_start_watchdog_timer(self, 3*HZ); 
+		break;
+	case IRCOMM_TTY_CONNECT_INDICATION:
+		del_timer(&self->watchdog_timer);
+		ircomm_tty_ias_unregister(self);
+
+		/* Accept connection */
+		ircomm_connect_response(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_DETACH_CABLE:
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_tty_state_query_lsap_sel (self, event, skb, info)
+ *
+ *    Query remote LM-IAS for the LSAP selector which we can connect to
+ *
+ */
+static int ircomm_tty_state_query_lsap_sel(struct ircomm_tty_cb *self, 
+					   IRCOMM_TTY_EVENT event, 
+					   struct sk_buff *skb, 
+					   struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+
+	switch (event) {
+	case IRCOMM_TTY_GOT_LSAPSEL:
+		/* Connect to remote device */
+		ret = ircomm_connect_request(self->ircomm, self->dlsap_sel,
+					     self->saddr, self->daddr, 
+					     NULL, self->service_type);
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		ircomm_tty_next_state(self, IRCOMM_TTY_SETUP);
+		break;
+	case IRCOMM_TTY_WD_TIMER_EXPIRED:
+		/* Go back to search mode */
+		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		break;
+	case IRCOMM_TTY_CONNECT_INDICATION:
+		del_timer(&self->watchdog_timer);
+		ircomm_tty_ias_unregister(self);
+
+		/* Accept connection */
+		ircomm_connect_response(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_DETACH_CABLE:
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_tty_state_setup (self, event, skb, info)
+ *
+ *    Trying to connect
+ *
+ */
+static int ircomm_tty_state_setup(struct ircomm_tty_cb *self, 
+				  IRCOMM_TTY_EVENT event, 
+				  struct sk_buff *skb, 
+				  struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	IRDA_DEBUG(2, "%s: state=%s, event=%s\n", __FUNCTION__ ,
+		   ircomm_tty_state[self->state], ircomm_tty_event[event]);
+
+	switch (event) {
+	case IRCOMM_TTY_CONNECT_CONFIRM:
+		del_timer(&self->watchdog_timer);
+		ircomm_tty_ias_unregister(self);
+		
+		/* 
+		 * Send initial parameters. This will also send out queued
+		 * parameters waiting for the connection to come up 
+		 */
+		ircomm_tty_send_initial_parameters(self);
+		ircomm_tty_link_established(self);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_CONNECT_INDICATION:
+		del_timer(&self->watchdog_timer);
+		ircomm_tty_ias_unregister(self);
+		
+		/* Accept connection */
+		ircomm_connect_response(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_READY);
+		break;
+	case IRCOMM_TTY_WD_TIMER_EXPIRED:
+		/* Go back to search mode */
+		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+		break;
+	case IRCOMM_TTY_DETACH_CABLE:
+		/* ircomm_disconnect_request(self->ircomm, NULL); */
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * Function ircomm_tty_state_ready (self, event, skb, info)
+ *
+ *    IrCOMM is now connected
+ *
+ */
+static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, 
+				  IRCOMM_TTY_EVENT event, 
+				  struct sk_buff *skb, 
+				  struct ircomm_tty_info *info)
+{
+	int ret = 0;
+
+	switch (event) {
+	case IRCOMM_TTY_DATA_REQUEST:
+		ret = ircomm_data_request(self->ircomm, skb);
+		break;		
+	case IRCOMM_TTY_DETACH_CABLE:
+		ircomm_disconnect_request(self->ircomm, NULL);
+		ircomm_tty_next_state(self, IRCOMM_TTY_IDLE);
+		break;
+	case IRCOMM_TTY_DISCONNECT_INDICATION:
+		ircomm_tty_ias_register(self);
+		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
+		ircomm_tty_start_watchdog_timer(self, 3*HZ);
+
+		if (self->flags & ASYNC_CHECK_CD) {
+			/* Drop carrier */
+			self->settings.dce = IRCOMM_DELTA_CD;
+			ircomm_tty_check_modem_status(self);
+		} else {
+			IRDA_DEBUG(0, "%s(), hanging up!\n", __FUNCTION__ );
+			if (self->tty)
+				tty_hangup(self->tty);
+		}
+		break;
+	default:
+		IRDA_DEBUG(2, "%s(), unknown event: %s\n", __FUNCTION__ ,
+			   ircomm_tty_event[event]);
+		ret = -EINVAL;
+	}
+	return ret;
+}
+