summaryrefslogtreecommitdiff
path: root/net/irda/ircomm/ircomm_param.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/irda/ircomm/ircomm_param.c')
-rw-r--r--net/irda/ircomm/ircomm_param.c502
1 files changed, 502 insertions, 0 deletions
diff --git a/net/irda/ircomm/ircomm_param.c b/net/irda/ircomm/ircomm_param.c
new file mode 100644
index 000000000..3c4caa60c
--- /dev/null
+++ b/net/irda/ircomm/ircomm_param.c
@@ -0,0 +1,502 @@
+/*********************************************************************
+ *
+ * Filename: ircomm_param.c
+ * Version: 1.0
+ * Description: Parameter handling for the IrCOMM protocol
+ * Status: Experimental.
+ * Author: Dag Brattli <dagb@cs.uit.no>
+ * Created at: Mon Jun 7 10:25:11 1999
+ * Modified at: Sun Jan 30 14:32:03 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, see <http://www.gnu.org/licenses/>.
+ *
+ ********************************************************************/
+
+#include <linux/gfp.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+
+#include <net/irda/irda.h>
+#include <net/irda/parameters.h>
+
+#include <net/irda/ircomm_core.h>
+#include <net/irda/ircomm_tty_attach.h>
+#include <net/irda/ircomm_tty.h>
+
+#include <net/irda/ircomm_param.h>
+
+static int ircomm_param_service_type(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_port_type(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_port_name(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_service_type(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_data_rate(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_data_format(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_flow_control(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_xon_xoff(void *instance, irda_param_t *param, int get);
+static int ircomm_param_enq_ack(void *instance, irda_param_t *param, int get);
+static int ircomm_param_line_status(void *instance, irda_param_t *param,
+ int get);
+static int ircomm_param_dte(void *instance, irda_param_t *param, int get);
+static int ircomm_param_dce(void *instance, irda_param_t *param, int get);
+static int ircomm_param_poll(void *instance, irda_param_t *param, int get);
+
+static const pi_minor_info_t pi_minor_call_table_common[] = {
+ { ircomm_param_service_type, PV_INT_8_BITS },
+ { ircomm_param_port_type, PV_INT_8_BITS },
+ { ircomm_param_port_name, PV_STRING }
+};
+static const pi_minor_info_t pi_minor_call_table_non_raw[] = {
+ { ircomm_param_data_rate, PV_INT_32_BITS | PV_BIG_ENDIAN },
+ { ircomm_param_data_format, PV_INT_8_BITS },
+ { ircomm_param_flow_control, PV_INT_8_BITS },
+ { ircomm_param_xon_xoff, PV_INT_16_BITS },
+ { ircomm_param_enq_ack, PV_INT_16_BITS },
+ { ircomm_param_line_status, PV_INT_8_BITS }
+};
+static const pi_minor_info_t pi_minor_call_table_9_wire[] = {
+ { ircomm_param_dte, PV_INT_8_BITS },
+ { ircomm_param_dce, PV_INT_8_BITS },
+ { ircomm_param_poll, PV_NO_VALUE },
+};
+
+static const pi_major_info_t pi_major_call_table[] = {
+ { pi_minor_call_table_common, 3 },
+ { pi_minor_call_table_non_raw, 6 },
+ { pi_minor_call_table_9_wire, 3 }
+/* { pi_minor_call_table_centronics } */
+};
+
+pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 };
+
+/*
+ * Function ircomm_param_request (self, pi, flush)
+ *
+ * Queue a parameter for the control channel
+ *
+ */
+int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+ int count;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ /* Make sure we don't send parameters for raw mode */
+ if (self->service_type == IRCOMM_3_WIRE_RAW)
+ return 0;
+
+ spin_lock_irqsave(&self->spinlock, flags);
+
+ skb = self->ctrl_skb;
+ if (!skb) {
+ skb = alloc_skb(256, GFP_ATOMIC);
+ if (!skb) {
+ spin_unlock_irqrestore(&self->spinlock, flags);
+ return -ENOMEM;
+ }
+
+ skb_reserve(skb, self->max_header_size);
+ self->ctrl_skb = skb;
+ }
+ /*
+ * Inserting is a little bit tricky since we don't know how much
+ * room we will need. But this should hopefully work OK
+ */
+ count = irda_param_insert(self, pi, skb_tail_pointer(skb),
+ skb_tailroom(skb), &ircomm_param_info);
+ if (count < 0) {
+ net_warn_ratelimited("%s(), no room for parameter!\n",
+ __func__);
+ spin_unlock_irqrestore(&self->spinlock, flags);
+ return -1;
+ }
+ skb_put(skb, count);
+
+ spin_unlock_irqrestore(&self->spinlock, flags);
+
+ pr_debug("%s(), skb->len=%d\n", __func__ , skb->len);
+
+ if (flush) {
+ /* ircomm_tty_do_softint will take care of the rest */
+ schedule_work(&self->tqueue);
+ }
+
+ return count;
+}
+
+/*
+ * Function ircomm_param_service_type (self, buf, len)
+ *
+ * Handle service type, this function will both be called after the LM-IAS
+ * query and then the remote device sends its initial parameters
+ *
+ */
+static int ircomm_param_service_type(void *instance, irda_param_t *param,
+ int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+ __u8 service_type = (__u8) param->pv.i;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get) {
+ param->pv.i = self->settings.service_type;
+ return 0;
+ }
+
+ /* Find all common service types */
+ service_type &= self->service_type;
+ if (!service_type) {
+ pr_debug("%s(), No common service type to use!\n", __func__);
+ return -1;
+ }
+ pr_debug("%s(), services in common=%02x\n", __func__ ,
+ service_type);
+
+ /*
+ * Now choose a preferred service type of those available
+ */
+ if (service_type & IRCOMM_CENTRONICS)
+ self->settings.service_type = IRCOMM_CENTRONICS;
+ else if (service_type & IRCOMM_9_WIRE)
+ self->settings.service_type = IRCOMM_9_WIRE;
+ else if (service_type & IRCOMM_3_WIRE)
+ self->settings.service_type = IRCOMM_3_WIRE;
+ else if (service_type & IRCOMM_3_WIRE_RAW)
+ self->settings.service_type = IRCOMM_3_WIRE_RAW;
+
+ pr_debug("%s(), resulting service type=0x%02x\n", __func__ ,
+ self->settings.service_type);
+
+ /*
+ * Now the line is ready for some communication. Check if we are a
+ * server, and send over some initial parameters.
+ * Client do it in ircomm_tty_state_setup().
+ * Note : we may get called from ircomm_tty_getvalue_confirm(),
+ * therefore before we even have open any socket. And self->client
+ * is initialised to TRUE only later. So, we check if the link is
+ * really initialised. - Jean II
+ */
+ if ((self->max_header_size != IRCOMM_TTY_HDR_UNINITIALISED) &&
+ (!self->client) &&
+ (self->settings.service_type != IRCOMM_3_WIRE_RAW))
+ {
+ /* Init connection */
+ ircomm_tty_send_initial_parameters(self);
+ ircomm_tty_link_established(self);
+ }
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_port_type (self, param)
+ *
+ * The port type parameter tells if the devices are serial or parallel.
+ * Since we only advertise serial service, this parameter should only
+ * be equal to IRCOMM_SERIAL.
+ */
+static int ircomm_param_port_type(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get)
+ param->pv.i = IRCOMM_SERIAL;
+ else {
+ self->settings.port_type = (__u8) param->pv.i;
+
+ pr_debug("%s(), port type=%d\n", __func__ ,
+ self->settings.port_type);
+ }
+ return 0;
+}
+
+/*
+ * Function ircomm_param_port_name (self, param)
+ *
+ * Exchange port name
+ *
+ */
+static int ircomm_param_port_name(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get) {
+ pr_debug("%s(), not imp!\n", __func__);
+ } else {
+ pr_debug("%s(), port-name=%s\n", __func__ , param->pv.c);
+ strncpy(self->settings.port_name, param->pv.c, 32);
+ }
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_data_rate (self, param)
+ *
+ * Exchange data rate to be used in this settings
+ *
+ */
+static int ircomm_param_data_rate(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get)
+ param->pv.i = self->settings.data_rate;
+ else
+ self->settings.data_rate = param->pv.i;
+
+ pr_debug("%s(), data rate = %d\n", __func__ , param->pv.i);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_data_format (self, param)
+ *
+ * Exchange data format to be used in this settings
+ *
+ */
+static int ircomm_param_data_format(void *instance, irda_param_t *param,
+ int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get)
+ param->pv.i = self->settings.data_format;
+ else
+ self->settings.data_format = (__u8) param->pv.i;
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_flow_control (self, param)
+ *
+ * Exchange flow control settings to be used in this settings
+ *
+ */
+static int ircomm_param_flow_control(void *instance, irda_param_t *param,
+ int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get)
+ param->pv.i = self->settings.flow_control;
+ else
+ self->settings.flow_control = (__u8) param->pv.i;
+
+ pr_debug("%s(), flow control = 0x%02x\n", __func__ , (__u8)param->pv.i);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_xon_xoff (self, param)
+ *
+ * Exchange XON/XOFF characters
+ *
+ */
+static int ircomm_param_xon_xoff(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get) {
+ param->pv.i = self->settings.xonxoff[0];
+ param->pv.i |= self->settings.xonxoff[1] << 8;
+ } else {
+ self->settings.xonxoff[0] = (__u16) param->pv.i & 0xff;
+ self->settings.xonxoff[1] = (__u16) param->pv.i >> 8;
+ }
+
+ pr_debug("%s(), XON/XOFF = 0x%02x,0x%02x\n", __func__ ,
+ param->pv.i & 0xff, param->pv.i >> 8);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_enq_ack (self, param)
+ *
+ * Exchange ENQ/ACK characters
+ *
+ */
+static int ircomm_param_enq_ack(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get) {
+ param->pv.i = self->settings.enqack[0];
+ param->pv.i |= self->settings.enqack[1] << 8;
+ } else {
+ self->settings.enqack[0] = (__u16) param->pv.i & 0xff;
+ self->settings.enqack[1] = (__u16) param->pv.i >> 8;
+ }
+
+ pr_debug("%s(), ENQ/ACK = 0x%02x,0x%02x\n", __func__ ,
+ param->pv.i & 0xff, param->pv.i >> 8);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_line_status (self, param)
+ *
+ *
+ *
+ */
+static int ircomm_param_line_status(void *instance, irda_param_t *param,
+ int get)
+{
+ pr_debug("%s(), not impl.\n", __func__);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_dte (instance, param)
+ *
+ * If we get here, there must be some sort of null-modem connection, and
+ * we are probably working in server mode as well.
+ */
+static int ircomm_param_dte(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+ __u8 dte;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ if (get)
+ param->pv.i = self->settings.dte;
+ else {
+ dte = (__u8) param->pv.i;
+
+ self->settings.dce = 0;
+
+ if (dte & IRCOMM_DELTA_DTR)
+ self->settings.dce |= (IRCOMM_DELTA_DSR|
+ IRCOMM_DELTA_RI |
+ IRCOMM_DELTA_CD);
+ if (dte & IRCOMM_DTR)
+ self->settings.dce |= (IRCOMM_DSR|
+ IRCOMM_RI |
+ IRCOMM_CD);
+
+ if (dte & IRCOMM_DELTA_RTS)
+ self->settings.dce |= IRCOMM_DELTA_CTS;
+ if (dte & IRCOMM_RTS)
+ self->settings.dce |= IRCOMM_CTS;
+
+ /* Take appropriate actions */
+ ircomm_tty_check_modem_status(self);
+
+ /* Null modem cable emulator */
+ self->settings.null_modem = TRUE;
+ }
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_dce (instance, param)
+ *
+ *
+ *
+ */
+static int ircomm_param_dce(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+ __u8 dce;
+
+ pr_debug("%s(), dce = 0x%02x\n", __func__ , (__u8)param->pv.i);
+
+ dce = (__u8) param->pv.i;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ self->settings.dce = dce;
+
+ /* Check if any of the settings have changed */
+ if (dce & 0x0f) {
+ if (dce & IRCOMM_DELTA_CTS) {
+ pr_debug("%s(), CTS\n", __func__);
+ }
+ }
+
+ ircomm_tty_check_modem_status(self);
+
+ return 0;
+}
+
+/*
+ * Function ircomm_param_poll (instance, param)
+ *
+ * Called when the peer device is polling for the line settings
+ *
+ */
+static int ircomm_param_poll(void *instance, irda_param_t *param, int get)
+{
+ struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+
+ IRDA_ASSERT(self != NULL, return -1;);
+ IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+ /* Poll parameters are always of length 0 (just a signal) */
+ if (!get) {
+ /* Respond with DTE line settings */
+ ircomm_param_request(self, IRCOMM_DTE, TRUE);
+ }
+ return 0;
+}
+
+
+
+
+
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 01:08:22 +0000