+++ /dev/null
-/*********************************************************************
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- ********************************************************************/
-
-#include <linux/init.h>
-#include <linux/sched.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);
-
-const char *const 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 *** ",
-};
-
-static const char *const ircomm_tty_event[] __maybe_unused = {
- "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 ****",
-};
-
-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)
-{
- struct tty_struct *tty;
-
- 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)) {
- pr_debug("%s(), already connected!\n", __func__);
- return 0;
- }
-
- /* Make sure nobody tries to write before the link is up */
- tty = tty_port_tty_get(&self->port);
- if (tty) {
- tty->hw_stopped = 1;
- tty_kref_put(tty);
- }
-
- 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_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_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
- */
- pr_debug("%s(), data-rate = %d\n", __func__ ,
- self->settings.data_rate);
- if (!self->settings.data_rate)
- self->settings.data_rate = 9600;
- pr_debug("%s(), data-format = %d\n", __func__ ,
- self->settings.data_format);
- if (!self->settings.data_format)
- self->settings.data_format = IRCOMM_WSIZE_8; /* 8N1 */
-
- pr_debug("%s(), flow-control = %d\n", __func__ ,
- 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;
-
- /* 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;
-
- self = priv;
- ircomm_tty_do_event(self, IRCOMM_TTY_DISCOVERY_INDICATION,
- NULL, &info);
-}
-
-/*
- * 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;
- struct tty_struct *tty;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
- tty = tty_port_tty_get(&self->port);
- if (!tty)
- return;
-
- /* This will stop control data transfers */
- self->flow = FLOW_STOP;
-
- /* Stop data transfers */
- tty->hw_stopped = 1;
-
- ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL,
- NULL);
- tty_kref_put(tty);
-}
-
-/*
- * 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_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) {
- pr_debug("%s(), got NULL value!\n", __func__);
- return;
- }
-
- switch (value->type) {
- case IAS_OCT_SEQ:
- pr_debug("%s(), got octet sequence\n", __func__);
-
- 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 */
- pr_debug("%s(), got lsapsel = %d\n", __func__ ,
- value->t.integer);
-
- if (value->t.integer == -1) {
- pr_debug("%s(), invalid value!\n", __func__);
- } else
- self->dlsap_sel = value->t.integer;
-
- ircomm_tty_do_event(self, IRCOMM_TTY_GOT_LSAPSEL, NULL, NULL);
- break;
- case IAS_MISSING:
- pr_debug("%s(), got IAS_MISSING\n", __func__);
- break;
- default:
- pr_debug("%s(), got unknown type!\n", __func__);
- 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_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_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)
-{
- struct tty_struct *tty;
-
- IRDA_ASSERT(self != NULL, return;);
- IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
- tty = tty_port_tty_get(&self->port);
- if (!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 (tty_port_cts_enabled(&self->port) &&
- ((self->settings.dce & IRCOMM_CTS) == 0)) {
- pr_debug("%s(), waiting for CTS ...\n", __func__);
- goto put;
- } else {
- pr_debug("%s(), starting hardware!\n", __func__);
-
- tty->hw_stopped = 0;
-
- /* Wake up processes blocked on open */
- wake_up_interruptible(&self->port.open_wait);
- }
-
- schedule_work(&self->tqueue);
-put:
- tty_kref_put(tty);
-}
-
-/*
- * 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_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;);
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- 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;);
-
- pr_debug("%s: next state=%s, service type=%d\n", __func__ ,
- 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;
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- 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) {
- net_warn_ratelimited("%s(), busy with a previous query\n",
- __func__);
- 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:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- 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;
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- 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) {
- net_warn_ratelimited("%s(), busy with a previous query\n",
- __func__);
- 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:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- 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;
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- ircomm_tty_state[self->state], ircomm_tty_event[event]);
-
- switch (event) {
- case IRCOMM_TTY_GOT_PARAMETERS:
- if (self->iriap) {
- net_warn_ratelimited("%s(), busy with a previous query\n",
- __func__);
- 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:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- 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;
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- 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:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- 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;
-
- pr_debug("%s: state=%s, event=%s\n", __func__ ,
- 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:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- 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 (tty_port_check_carrier(&self->port)) {
- /* Drop carrier */
- self->settings.dce = IRCOMM_DELTA_CD;
- ircomm_tty_check_modem_status(self);
- } else {
- pr_debug("%s(), hanging up!\n", __func__);
- tty_port_tty_hangup(&self->port, false);
- }
- break;
- default:
- pr_debug("%s(), unknown event: %s\n", __func__ ,
- ircomm_tty_event[event]);
- ret = -EINVAL;
- }
- return ret;
-}
-
projects / linux-2.6-block.git / blobdiff