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Commit a2252286 authored by Linus Torvalds's avatar Linus Torvalds
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Merge http://gkernel.bkbits.net/irda-2.5 

into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux
parents eee79d4f b4093065
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Showing with 3119 additions and 43 deletions
drivers/net/irda/Kconfig
View file @ a2252286
......@@ -9,7 +9,7 @@ config IRTTY_SIR
depends on IRDA
help
Say Y here if you want to build support for the IrTTY line
discipline. If you want to compile it as a module (irtty.o), say M
discipline. If you want to compile it as a module (irtty-sir.o), say M
here and read <file:Documentation/modules.txt>. IrTTY makes it
possible to use Linux's own serial driver for all IrDA ports that
are 16550 compatible. Most IrDA chips are 16550 compatible so you
......@@ -18,6 +18,69 @@ config IRTTY_SIR
If unsure, say Y.
comment "Dongle support"
config DONGLE
bool "Serial dongle support"
help
Say Y here if you have an infrared device that connects to your
computer's serial port. These devices are called dongles. Then say Y
or M to the driver for your particular dongle below.
Note that the answer to this question won't directly affect the
kernel: saying N will just cause the configurator to skip all
the questions about serial dongles.
config ESI_DONGLE
tristate "ESI JetEye PC dongle"
depends on DONGLE && IRDA
help
Say Y here if you want to build support for the Extended Systems
JetEye PC dongle. If you want to compile it as a module, say M here
and read <file:Documentation/modules.txt>. The ESI dongle attaches
to the normal 9-pin serial port connector, and can currently only be
used by IrTTY. To activate support for ESI dongles you will have to
start irattach like this: "irattach -d esi".
config ACTISYS_DONGLE
tristate "ACTiSYS IR-220L and IR220L+ dongle"
depends on DONGLE && IRDA
help
Say Y here if you want to build support for the ACTiSYS IR-220L and
IR220L+ dongles. If you want to compile it as a module, say M here
and read <file:Documentation/modules.txt>. The ACTiSYS dongles
attaches to the normal 9-pin serial port connector, and can
currently only be used by IrTTY. To activate support for ACTiSYS
dongles you will have to start irattach like this:
"irattach -d actisys" or "irattach -d actisys+".
config TEKRAM_DONGLE
tristate "Tekram IrMate 210B dongle"
depends on DONGLE && IRDA
help
Say Y here if you want to build support for the Tekram IrMate 210B
dongle. If you want to compile it as a module, say M here and read
<file:Documentation/modules.txt>. The Tekram dongle attaches to the
normal 9-pin serial port connector, and can currently only be used
by IrTTY. To activate support for Tekram dongles you will have to
start irattach like this: "irattach -d tekram".
comment "Old SIR device drivers"
config IRTTY_OLD
tristate "Old IrTTY (broken)"
depends on IRDA
help
Say Y here if you want to build support for the IrTTY line
discipline. If you want to compile it as a module (irtty.o), say M
here and read <file:Documentation/modules.txt>. IrTTY makes it
possible to use Linux's own serial driver for all IrDA ports that
are 16550 compatible. Most IrDA chips are 16550 compatible so you
should probably say Y to this option. Using IrTTY will however
limit the speed of the connection to 115200 bps (IrDA SIR mode).
If unsure, say N.
config IRPORT_SIR
tristate "IrPORT (IrDA serial driver)"
depends on IRDA
......@@ -35,10 +98,10 @@ config IRPORT_SIR
If unsure, say Y.
comment "Dongle support"
comment "Old Serial dongle support"
config DONGLE
bool "Serial dongle support"
config DONGLE_OLD
bool "Old Serial dongle support"
help
Say Y here if you have an infrared device that connects to your
computer's serial port. These devices are called dongles. Then say Y
......@@ -48,9 +111,9 @@ config DONGLE
kernel: saying N will just cause the configurator to skip all
the questions about serial dongles.
config ESI_DONGLE
config ESI_DONGLE_OLD
tristate "ESI JetEye PC dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Extended Systems
JetEye PC dongle. If you want to compile it as a module, say M here
......@@ -59,9 +122,9 @@ config ESI_DONGLE
used by IrTTY. To activate support for ESI dongles you will have to
start irattach like this: "irattach -d esi".
config ACTISYS_DONGLE
config ACTISYS_DONGLE_OLD
tristate "ACTiSYS IR-220L and IR220L+ dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the ACTiSYS IR-220L and
IR220L+ dongles. If you want to compile it as a module, say M here
......@@ -71,9 +134,9 @@ config ACTISYS_DONGLE
dongles you will have to start irattach like this:
"irattach -d actisys" or "irattach -d actisys+".
config TEKRAM_DONGLE
config TEKRAM_DONGLE_OLD
tristate "Tekram IrMate 210B dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Tekram IrMate 210B
dongle. If you want to compile it as a module, say M here and read
......@@ -84,7 +147,7 @@ config TEKRAM_DONGLE
config GIRBIL_DONGLE
tristate "Greenwich GIrBIL dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Greenwich GIrBIL
dongle. If you want to compile it as a module, say M here and read
......@@ -95,7 +158,7 @@ config GIRBIL_DONGLE
config LITELINK_DONGLE
tristate "Parallax LiteLink dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Parallax Litelink
dongle. If you want to compile it as a module, say M here and read
......@@ -106,7 +169,7 @@ config LITELINK_DONGLE
config MCP2120_DONGLE
tristate "Microchip MCP2120"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Microchip MCP2120
dongle. If you want to compile it as a module, say M here and read
......@@ -120,7 +183,7 @@ config MCP2120_DONGLE
config OLD_BELKIN_DONGLE
tristate "Old Belkin dongle"
depends on DONGLE && IRDA
depends on DONGLE_OLD && IRDA
help
Say Y here if you want to build support for the Adaptec Airport 1000
and 2000 dongles. If you want to compile it as a module, say M here
......@@ -130,11 +193,11 @@ config OLD_BELKIN_DONGLE
config EP7211_IR
tristate "EP7211 I/R support"
depends on DONGLE && ARCH_EP7211 && IRDA
depends on DONGLE_OLD && ARCH_EP7211 && IRDA
config ACT200L_DONGLE
tristate "ACTiSYS IR-200L dongle (EXPERIMENTAL)"
depends on DONGLE && EXPERIMENTAL && IRDA
depends on DONGLE_OLD && EXPERIMENTAL && IRDA
help
Say Y here if you want to build support for the ACTiSYS IR-200L
dongle. If you want to compile it as a module, say M here and read
......@@ -145,7 +208,7 @@ config ACT200L_DONGLE
config MA600_DONGLE
tristate "Mobile Action MA600 dongle (EXPERIMENTAL)"
depends on DONGLE && EXPERIMENTAL && IRDA
depends on DONGLE_OLD && EXPERIMENTAL && IRDA
---help---
Say Y here if you want to build support for the Mobile Action MA600
dongle. If you want to compile it as a module, say M here and read
......
drivers/net/irda/Makefile
View file @ a2252286
......@@ -5,10 +5,12 @@
# Rewritten to use lists instead of if-statements.
#
export-objs = irport.o
export-objs = irport.o sir_core.o
obj-$(CONFIG_IRTTY_SIR) += irtty.o
# Old SIR drivers (irtty is broken)
obj-$(CONFIG_IRTTY_OLD) += irtty.o
obj-$(CONFIG_IRPORT_SIR) += irport.o
# FIR drivers
obj-$(CONFIG_USB_IRDA) += irda-usb.o
obj-$(CONFIG_NSC_FIR) += nsc-ircc.o
obj-$(CONFIG_WINBOND_FIR) += w83977af_ir.o
......@@ -18,9 +20,10 @@ obj-$(CONFIG_TOSHIBA_FIR) += donauboe.o
obj-$(CONFIG_SMC_IRCC_FIR) += smc-ircc.o irport.o
obj-$(CONFIG_ALI_FIR) += ali-ircc.o
obj-$(CONFIG_VLSI_FIR) += vlsi_ir.o
obj-$(CONFIG_ESI_DONGLE) += esi.o
obj-$(CONFIG_TEKRAM_DONGLE) += tekram.o
obj-$(CONFIG_ACTISYS_DONGLE) += actisys.o
# Old dongle drivers for old SIR drivers
obj-$(CONFIG_ESI_OLD) += esi.o
obj-$(CONFIG_TEKRAM_OLD) += tekram.o
obj-$(CONFIG_ACTISYS_OLD) += actisys.o
obj-$(CONFIG_GIRBIL_DONGLE) += girbil.o
obj-$(CONFIG_LITELINK_DONGLE) += litelink.o
obj-$(CONFIG_OLD_BELKIN_DONGLE) += old_belkin.o
......@@ -28,5 +31,14 @@ obj-$(CONFIG_EP7211_IR) += ep7211_ir.o
obj-$(CONFIG_MCP2120_DONGLE) += mcp2120.o
obj-$(CONFIG_ACT200L_DONGLE) += act200l.o
obj-$(CONFIG_MA600_DONGLE) += ma600.o
# New SIR drivers
obj-$(CONFIG_IRTTY_SIR) += irtty-sir.o sir-dev.o
# New dongles drivers for new SIR drivers
obj-$(CONFIG_ESI_DONGLE) += esi-sir.o
obj-$(CONFIG_TEKRAM_DONGLE) += tekram-sir.o
obj-$(CONFIG_ACTISYS_DONGLE) += actisys-sir.o
# The SIR helper module
sir-dev-objs := sir_core.o sir_dev.o sir_dongle.o sir_kthread.o
include $(TOPDIR)/Rules.make
drivers/net/irda/actisys-sir.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* Filename: actisys.c
* Version: 1.1
* Description: Implementation for the ACTiSYS IR-220L and IR-220L+
* dongles
* Status: Beta.
* Authors: Dag Brattli <dagb@cs.uit.no> (initially)
* Jean Tourrilhes <jt@hpl.hp.com> (new version)
* Martin Diehl <mad@mdiehl.de> (new version for sir_dev)
* Created at: Wed Oct 21 20:02:35 1998
* Modified at: Sun Oct 27 22:02:13 2002
* Modified by: Martin Diehl <mad@mdiehl.de>
*
* Copyright (c) 1998-1999 Dag Brattli, All Rights Reserved.
* Copyright (c) 1999 Jean Tourrilhes
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
/*
* Changelog
*
* 0.8 -> 0.9999 - Jean
* o New initialisation procedure : much safer and correct
* o New procedure the change speed : much faster and simpler
* o Other cleanups & comments
* Thanks to Lichen Wang @ Actisys for his excellent help...
*
* 1.0 -> 1.1 - Martin Diehl
* modified for new sir infrastructure
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
/*
* Define the timing of the pulses we send to the dongle (to reset it, and
* to toggle speeds). Basically, the limit here is the propagation speed of
* the signals through the serial port, the dongle being much faster. Any
* serial port support 115 kb/s, so we are sure that pulses 8.5 us wide can
* go through cleanly . If you are on the wild side, you can try to lower
* this value (Actisys recommended me 2 us, and 0 us work for me on a P233!)
*/
#define MIN_DELAY 10 /* 10 us to be on the conservative side */
static int actisys_open(struct sir_dev *);
static int actisys_close(struct sir_dev *);
static int actisys_change_speed(struct sir_dev *, unsigned);
static int actisys_reset(struct sir_dev *);
/* These are the baudrates supported, in the order available */
/* Note : the 220L doesn't support 38400, but we will fix that below */
static __u32 baud_rates[] = { 9600, 19200, 57600, 115200, 38400 };
#define MAX_SPEEDS (sizeof(baud_rates)/sizeof(baud_rates[0]))
static struct dongle_driver act220l = {
.owner = THIS_MODULE,
.driver_name = "Actisys ACT-220L",
.type = IRDA_ACTISYS_DONGLE,
.open = actisys_open,
.close = actisys_close,
.reset = actisys_reset,
.set_speed = actisys_change_speed,
};
static struct dongle_driver act220l_plus = {
.owner = THIS_MODULE,
.driver_name = "Actisys ACT-220L+",
.type = IRDA_ACTISYS_PLUS_DONGLE,
.open = actisys_open,
.close = actisys_close,
.reset = actisys_reset,
.set_speed = actisys_change_speed,
};
int __init actisys_sir_init(void)
{
int ret;
/* First, register an Actisys 220L dongle */
ret = irda_register_dongle(&act220l);
if (ret < 0)
return ret;
/* Now, register an Actisys 220L+ dongle */
ret = irda_register_dongle(&act220l_plus);
if (ret < 0) {
irda_unregister_dongle(&act220l);
return ret;
}
return 0;
}
void __exit actisys_sir_cleanup(void)
{
/* We have to remove both dongles */
irda_unregister_dongle(&act220l_plus);
irda_unregister_dongle(&act220l);
}
static int actisys_open(struct sir_dev *dev)
{
struct qos_info *qos = &dev->qos;
dev->set_dtr_rts(dev, TRUE, TRUE);
/* Set the speeds we can accept */
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
/* Remove support for 38400 if this is not a 220L+ dongle */
if (dev->dongle_drv->type == IRDA_ACTISYS_DONGLE)
qos->baud_rate.bits &= ~IR_38400;
qos->min_turn_time.bits = 0x7f; /* Needs 0.01 ms */
irda_qos_bits_to_value(qos);
return 0;
}
static int actisys_close(struct sir_dev *dev)
{
/* Power off the dongle */
dev->set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function actisys_change_speed (task)
*
* Change speed of the ACTiSYS IR-220L and IR-220L+ type IrDA dongles.
* To cycle through the available baud rates, pulse RTS low for a few us.
*
* First, we reset the dongle to always start from a known state.
* Then, we cycle through the speeds by pulsing RTS low and then up.
* The dongle allow us to pulse quite fast, se we can set speed in one go,
* which is must faster ( < 100 us) and less complex than what is found
* in some other dongle drivers...
* Note that even if the new speed is the same as the current speed,
* we reassert the speed. This make sure that things are all right,
* and it's fast anyway...
* By the way, this function will work for both type of dongles,
* because the additional speed is at the end of the sequence...
*/
static int actisys_change_speed(struct sir_dev *dev, unsigned speed)
{
int ret = 0;
int i = 0;
IRDA_DEBUG(4, "%s(), speed=%d (was %d)\n", __FUNCTION__,
speed, dev->speed);
/* dongle was already resetted from irda_request state machine,
* we are in known state (dongle default)
*/
/*
* Now, we can set the speed requested. Send RTS pulses until we
* reach the target speed
*/
for (i=0; i<MAX_SPEEDS; i++) {
if (speed == baud_rates[i]) {
dev->speed = baud_rates[i];
break;
}
/* Set RTS low for 10 us */
dev->set_dtr_rts(dev, TRUE, FALSE);
udelay(MIN_DELAY);
/* Set RTS high for 10 us */
dev->set_dtr_rts(dev, TRUE, TRUE);
udelay(MIN_DELAY);
}
/* Check if life is sweet... */
if (i >= MAX_SPEEDS)
ret = -1; /* This should not happen */
/* Basta lavoro, on se casse d'ici... */
return ret;
}
/*
* Function actisys_reset (task)
*
* Reset the Actisys type dongle. Warning, this function must only be
* called with a process context!
*
* We need to do two things in this function :
* o first make sure that the dongle is in a state where it can operate
* o second put the dongle in a know state
*
* The dongle is powered of the RTS and DTR lines. In the dongle, there
* is a big capacitor to accomodate the current spikes. This capacitor
* takes a least 50 ms to be charged. In theory, the Bios set those lines
* up, so by the time we arrive here we should be set. It doesn't hurt
* to be on the conservative side, so we will wait...
* <Martin : move above comment to irda_config_fsm>
* Then, we set the speed to 9600 b/s to get in a known state (see in
* change_speed for details). It is needed because the IrDA stack
* has tried to set the speed immediately after our first return,
* so before we can be sure the dongle is up and running.
*/
static int actisys_reset(struct sir_dev *dev)
{
/* Reset the dongle : set DTR low for 10 us */
dev->set_dtr_rts(dev, FALSE, TRUE);
udelay(MIN_DELAY);
/* Go back to normal mode */
dev->set_dtr_rts(dev, TRUE, TRUE);
dev->speed = 9600; /* That's the default */
return 0;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no> - Jean Tourrilhes <jt@hpl.hp.com>");
MODULE_DESCRIPTION("ACTiSYS IR-220L and IR-220L+ dongle driver");
MODULE_LICENSE("GPL");
module_init(actisys_sir_init);
module_exit(actisys_sir_cleanup);
drivers/net/irda/donauboe.c
View file @ a2252286
......@@ -1825,26 +1825,26 @@ toshoboe_wakeup (struct pci_dev *pci_dev)
return 0;
}
static struct pci_driver toshoboe_pci_driver = {
name : "toshoboe",
id_table : toshoboe_pci_tbl,
probe : toshoboe_open,
remove : toshoboe_close,
suspend : toshoboe_gotosleep,
resume : toshoboe_wakeup
static struct pci_driver donauboe_pci_driver = {
.name = "donauboe",
.id_table = toshoboe_pci_tbl,
.probe = toshoboe_open,
.remove = toshoboe_close,
.suspend = toshoboe_gotosleep,
.resume = toshoboe_wakeup
};
int __init
toshoboe_init (void)
static int __init
donauboe_init (void)
{
return pci_module_init(&toshoboe_pci_driver);
return pci_module_init(&donauboe_pci_driver);
}
STATIC void __exit
toshoboe_cleanup (void)
static void __exit
donauboe_cleanup (void)
{
pci_unregister_driver(&toshoboe_pci_driver);
pci_unregister_driver(&donauboe_pci_driver);
}
module_init(toshoboe_init);
module_exit(toshoboe_cleanup);
module_init(donauboe_init);
module_exit(donauboe_cleanup);
drivers/net/irda/esi-sir.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* Filename: esi.c
* Version: 1.6
* Description: Driver for the Extended Systems JetEye PC dongle
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sat Feb 21 18:54:38 1998
* Modified at: Sun Oct 27 22:01:04 2002
* Modified by: Martin Diehl <mad@mdiehl.de>
*
* Copyright (c) 1999 Dag Brattli, <dagb@cs.uit.no>,
* Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
* Copyright (c) 2002 Martin Diehl, <mad@mdiehl.de>,
* 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/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
static int esi_open(struct sir_dev *);
static int esi_close(struct sir_dev *);
static int esi_change_speed(struct sir_dev *, unsigned);
static int esi_reset(struct sir_dev *);
static struct dongle_driver esi = {
.owner = THIS_MODULE,
.driver_name = "JetEye PC ESI-9680 PC",
.type = IRDA_ESI_DONGLE,
.open = esi_open,
.close = esi_close,
.reset = esi_reset,
.set_speed = esi_change_speed,
};
static int __init esi_sir_init(void)
{
return irda_register_dongle(&esi);
}
static void __exit esi_sir_cleanup(void)
{
irda_unregister_dongle(&esi);
}
static int esi_open(struct sir_dev *dev)
{
struct qos_info *qos = &dev->qos;
qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
irda_qos_bits_to_value(qos);
/* shouldn't we do set_dtr_rts(FALSE, TRUE) here (power up at 9600)? */
return 0;
}
static int esi_close(struct sir_dev *dev)
{
/* Power off dongle */
dev->set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function esi_change_speed (task)
*
* Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
*
*/
static int esi_change_speed(struct sir_dev *dev, unsigned speed)
{
int dtr, rts;
switch (speed) {
case 19200:
dtr = TRUE;
rts = FALSE;
break;
case 115200:
dtr = rts = TRUE;
break;
default:
speed = 9600;
/* fall through */
case 9600:
dtr = FALSE;
rts = TRUE;
break;
}
/* Change speed of dongle */
dev->set_dtr_rts(dev, dtr, rts);
dev->speed = speed;
/* do we need some delay for power stabilization? */
return 0;
}
/*
* Function esi_reset (task)
*
* Reset dongle;
*
*/
static int esi_reset(struct sir_dev *dev)
{
dev->set_dtr_rts(dev, FALSE, FALSE);
/* Hm, probably repower to 9600 and some delays? */
return 0;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
MODULE_LICENSE("GPL");
module_init(esi_sir_init);
module_exit(esi_sir_cleanup);
drivers/net/irda/irtty-sir.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* Filename: irtty-sir.c
* Version: 2.0
* Description: IrDA line discipline implementation
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Tue Dec 9 21:18:38 1997
* Modified at: Sun Oct 27 22:13:30 2002
* Modified by: Martin Diehl <mad@mdiehl.de>
* Sources: slip.c by Laurence Culhane, <loz@holmes.demon.co.uk>
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*
* Copyright (c) 1998-2000 Dag Brattli,
* Copyright (c) 2002 Martin Diehl,
* 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.
*
* Neither Dag Brattli nor University of Troms admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/smp_lock.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include "sir-dev.h"
#include "irtty-sir.h"
MODULE_PARM(qos_mtt_bits, "i");
MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
static int qos_mtt_bits = 0x03; /* 5 ms or more */
/* ------------------------------------------------------- */
/* device configuration callbacks always invoked with irda-thread context */
/* find out, how many chars we have in buffers below us
* this is allowed to lie, i.e. return less chars than we
* actually have. The returned value is used to determine
* how long the irdathread should wait before doing the
* real blocking wait_until_sent()
*/
static int irtty_chars_in_buffer(struct sir_dev *dev)
{
struct sirtty_cb *priv = dev->priv;
ASSERT(priv != NULL, return -1;);
ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
return priv->tty->driver.chars_in_buffer(priv->tty);
}
/* Wait (sleep) until underlaying hardware finished transmission
* i.e. hardware buffers are drained
* this must block and not return before all characters are really sent
*
* If the tty sits on top of a 16550A-like uart, there are typically
* up to 16 bytes in the fifo - f.e. 9600 bps 8N1 needs 16.7 msec
*
* With usbserial the uart-fifo is basically replaced by the converter's
* outgoing endpoint buffer, which can usually hold 64 bytes (at least).
* With pl2303 it appears we are safe with 60msec here.
*
* I really wish all serial drivers would provide
* correct implementation of wait_until_sent()
*/
#define USBSERIAL_TX_DONE_DELAY 60
static void irtty_wait_until_sent(struct sir_dev *dev)
{
struct sirtty_cb *priv = dev->priv;
struct tty_struct *tty;
ASSERT(priv != NULL, return;);
ASSERT(priv->magic == IRTTY_MAGIC, return;);
tty = priv->tty;
if (tty->driver.wait_until_sent) {
lock_kernel();
tty->driver.wait_until_sent(tty, MSECS_TO_JIFFIES(100));
unlock_kernel();
}
else {
set_task_state(current, TASK_UNINTERRUPTIBLE);
schedule_timeout(MSECS_TO_JIFFIES(USBSERIAL_TX_DONE_DELAY));
}
}
/*
* Function irtty_change_speed (dev, speed)
*
* Change the speed of the serial port.
*
* This may sleep in set_termios (usbserial driver f.e.) and must
* not be called from interrupt/timer/tasklet therefore.
* All such invocations are deferred to kIrDAd now so we can sleep there.
*/
static int irtty_change_speed(struct sir_dev *dev, unsigned speed)
{
struct sirtty_cb *priv = dev->priv;
struct tty_struct *tty;
struct termios old_termios;
int cflag;
ASSERT(priv != NULL, return -1;);
ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
tty = priv->tty;
lock_kernel();
old_termios = *(tty->termios);
cflag = tty->termios->c_cflag;
cflag &= ~CBAUD;
IRDA_DEBUG(2, "%s(), Setting speed to %d\n", __FUNCTION__, speed);
switch (speed) {
case 1200:
cflag |= B1200;
break;
case 2400:
cflag |= B2400;
break;
case 4800:
cflag |= B4800;
break;
case 19200:
cflag |= B19200;
break;
case 38400:
cflag |= B38400;
break;
case 57600:
cflag |= B57600;
break;
case 115200:
cflag |= B115200;
break;
case 9600:
default:
cflag |= B9600;
break;
}
tty->termios->c_cflag = cflag;
if (tty->driver.set_termios)
tty->driver.set_termios(tty, &old_termios);
unlock_kernel();
priv->io.speed = speed;
return 0;
}
/*
* Function irtty_set_dtr_rts (dev, dtr, rts)
*
* This function can be used by dongles etc. to set or reset the status
* of the dtr and rts lines
*/
static int irtty_set_dtr_rts(struct sir_dev *dev, int dtr, int rts)
{
struct sirtty_cb *priv = dev->priv;
int arg = 0;
ASSERT(priv != NULL, return -1;);
ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
#ifdef TIOCM_OUT2 /* Not defined for ARM */
arg = TIOCM_OUT2;
#endif
if (rts)
arg |= TIOCM_RTS;
if (dtr)
arg |= TIOCM_DTR;
/*
* The ioctl() function, or actually set_modem_info() in serial.c
* expects a pointer to the argument in user space. This is working
* here because we are always called from the kIrDAd thread which
* has set_fs(KERNEL_DS) permanently set. Therefore copy_from_user()
* is happy with our arg-parameter being local here in kernel space.
*/
lock_kernel();
if (priv->tty->driver.ioctl(priv->tty, NULL, TIOCMSET, (unsigned long) &arg)) {
IRDA_DEBUG(2, "%s(), error doing ioctl!\n", __FUNCTION__);
}
unlock_kernel();
return 0;
}
/* ------------------------------------------------------- */
/* called from sir_dev when there is more data to send
* context is either netdev->hard_xmit or some transmit-completion bh
* i.e. we are under spinlock here and must not sleep.
*
* Note: as of 2.5.44 the usb-serial driver calls down() on a semaphore
* hence we are hitting the might_sleep bugcatcher. IMHO the whole tty-api
* would be pretty pointless if write_room/write would be allowed to sleep.
* Furthermore other tty ldiscs (like ppp) do also require the driver not
* to sleep there. Hence this is considered a current limitation of
* usb-serial.
*/
static int irtty_do_write(struct sir_dev *dev, const unsigned char *ptr, size_t len)
{
struct sirtty_cb *priv = dev->priv;
struct tty_struct *tty;
int writelen;
ASSERT(priv != NULL, return -1;);
ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
tty = priv->tty;
if (!tty->driver.write)
return 0;
tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
if (tty->driver.write_room) {
writelen = tty->driver.write_room(tty);
if (writelen > len)
writelen = len;
}
else
writelen = len;
return tty->driver.write(tty, 0, ptr, writelen);
}
/* ------------------------------------------------------- */
/* irda line discipline callbacks */
/*
* Function irtty_receive_buf( tty, cp, count)
*
* Handle the 'receiver data ready' interrupt. This function is called
* by the 'tty_io' module in the kernel when a block of IrDA data has
* been received, which can now be decapsulated and delivered for
* further processing
*
* calling context depends on underlying driver and tty->low_latency!
* for example (low_latency: 1 / 0):
* serial.c: uart-interrupt / softint
* usbserial: urb-complete-interrupt / softint
*/
static void irtty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
char *fp, int count)
{
struct sir_dev *dev;
struct sirtty_cb *priv = tty->disc_data;
int i;
if (unlikely(!priv || priv->magic!=IRTTY_MAGIC))
return;
/* Please use ASSERT - Fix ASSERT as needed - Jean II */
if (unlikely(count==0)) /* yes, this happens */
return;
dev = priv->dev;
if (!dev) {
printk(KERN_ERR "%s(), not ready yet!\n", __FUNCTION__);
return;
}
for (i = 0; i < count; i++) {
/*
* Characters received with a parity error, etc?
*/
if (fp && *fp++) {
IRDA_DEBUG(0, "Framing or parity error!\n");
sirdev_receive(dev, NULL, 0); /* notify sir_dev (updating stats) */
return;
}
}
sirdev_receive(dev, cp, count);
}
/*
* Function irtty_receive_room (tty)
*
* Used by the TTY to find out how much data we can receive at a time
*
*/
static int irtty_receive_room(struct tty_struct *tty)
{
struct sirtty_cb *priv = tty->disc_data;
if (unlikely(!priv || priv->magic!=IRTTY_MAGIC))
return 0;
return 65536; /* We can handle an infinite amount of data. :-) */
}
/*
* Function irtty_write_wakeup (tty)
*
* Called by the driver when there's room for more data. If we have
* more packets to send, we send them here.
*
*/
static void irtty_write_wakeup(struct tty_struct *tty)
{
struct sirtty_cb *priv = tty->disc_data;
if (unlikely(!priv || priv->magic!=IRTTY_MAGIC))
return;
tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
if (priv->dev)
sirdev_write_complete(priv->dev);
}
/* ------------------------------------------------------- */
/*
* Function irtty_stop_receiver (tty, stop)
*
*/
static inline void irtty_stop_receiver(struct tty_struct *tty, int stop)
{
struct termios old_termios;
int cflag;
lock_kernel();
old_termios = *(tty->termios);
cflag = tty->termios->c_cflag;
if (stop)
cflag &= ~CREAD;
else
cflag |= CREAD;
tty->termios->c_cflag = cflag;
if (tty->driver.set_termios)
tty->driver.set_termios(tty, &old_termios);
unlock_kernel();
}
/*****************************************************************/
DECLARE_MUTEX(irtty_sem); /* serialize ldisc open/close with sir_dev */
/* notifier from sir_dev when irda% device gets opened (ifup) */
static int irtty_start_dev(struct sir_dev *dev)
{
struct sirtty_cb *priv;
struct tty_struct *tty;
/* serialize with ldisc open/close */
down(&irtty_sem);
priv = dev->priv;
if (unlikely(!priv || priv->magic!=IRTTY_MAGIC)) {
up(&irtty_sem);
return -ESTALE;
}
tty = priv->tty;
if (tty->driver.start)
tty->driver.start(tty);
/* Make sure we can receive more data */
irtty_stop_receiver(tty, FALSE);
up(&irtty_sem);
return 0;
}
/* notifier from sir_dev when irda% device gets closed (ifdown) */
static int irtty_stop_dev(struct sir_dev *dev)
{
struct sirtty_cb *priv;
struct tty_struct *tty;
/* serialize with ldisc open/close */
down(&irtty_sem);
priv = dev->priv;
if (unlikely(!priv || priv->magic!=IRTTY_MAGIC)) {
up(&irtty_sem);
return -ESTALE;
}
tty = priv->tty;
/* Make sure we don't receive more data */
irtty_stop_receiver(tty, TRUE);
if (tty->driver.stop)
tty->driver.stop(tty);
up(&irtty_sem);
return 0;
}
/* ------------------------------------------------------- */
struct sir_driver sir_tty_drv = {
.owner = THIS_MODULE,
.driver_name = "sir_tty",
.start_dev = irtty_start_dev,
.stop_dev = irtty_stop_dev,
.do_write = irtty_do_write,
.chars_in_buffer = irtty_chars_in_buffer,
.wait_until_sent = irtty_wait_until_sent,
.set_speed = irtty_change_speed,
.set_dtr_rts = irtty_set_dtr_rts,
};
/* ------------------------------------------------------- */
/*
* Function irtty_ioctl (tty, file, cmd, arg)
*
* The Swiss army knife of system calls :-)
*
*/
static int irtty_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
struct irtty_info { char name[6]; } info;
struct sir_dev *dev;
struct sirtty_cb *priv = tty->disc_data;
int size = _IOC_SIZE(cmd);
int err = 0;
ASSERT(priv != NULL, return -ENODEV;);
ASSERT(priv->magic == IRTTY_MAGIC, return -EBADR;);
IRDA_DEBUG(3, "%s(cmd=0x%X)\n", __FUNCTION__, cmd);
dev = priv->dev;
ASSERT(dev != NULL, return -1;);
if (_IOC_DIR(cmd) & _IOC_READ)
err = verify_area(VERIFY_WRITE, (void *) arg, size);
else if (_IOC_DIR(cmd) & _IOC_WRITE)
err = verify_area(VERIFY_READ, (void *) arg, size);
if (err)
return err;
switch (cmd) {
case TCGETS:
case TCGETA:
err = n_tty_ioctl(tty, file, cmd, arg);
break;
case IRTTY_IOCTDONGLE:
/* this call blocks for completion */
err = sirdev_set_dongle(dev, (IRDA_DONGLE) arg);
break;
case IRTTY_IOCGET:
ASSERT(dev->netdev != NULL, return -1;);
memset(&info, 0, sizeof(info));
strncpy(info.name, dev->netdev->name, sizeof(info.name)-1);
if (copy_to_user((void *)arg, &info, sizeof(info)))
err = -EFAULT;
break;
default:
err = -ENOIOCTLCMD;
break;
}
return err;
}
/*
* Function irtty_open(tty)
*
* This function is called by the TTY module when the IrDA line
* discipline is called for. Because we are sure the tty line exists,
* we only have to link it to a free IrDA channel.
*/
static int irtty_open(struct tty_struct *tty)
{
struct sir_dev *dev;
struct sirtty_cb *priv;
char hwname[16];
int ret = 0;
/* unfortunately, there's no tty_ldisc->owner field
* so there is some window for SMP race with rmmod
*/
MOD_INC_USE_COUNT;
/* First make sure we're not already connected. */
if (tty->disc_data != NULL) {
priv = tty->disc_data;
if (priv && priv->magic == IRTTY_MAGIC) {
ret = -EEXIST;
goto out;
}
tty->disc_data = NULL; /* ### */
}
/* stop the underlying driver */
irtty_stop_receiver(tty, TRUE);
if (tty->driver.stop)
tty->driver.stop(tty);
if (tty->driver.flush_buffer)
tty->driver.flush_buffer(tty);
/* from old irtty - but what is it good for?
* we _are_ the ldisc and we _dont_ implement flush_buffer!
*
* if (tty->ldisc.flush_buffer)
* tty->ldisc.flush_buffer(tty);
*/
/* create device name - could we use tty_name() here? */
if (strchr(tty->driver.name, '%')) {
sprintf(hwname, tty->driver.name,
minor(tty->device) - tty->driver.minor_start +
tty->driver.name_base);
}
else {
sprintf(hwname, "%s%d", tty->driver.name,
minor(tty->device) - tty->driver.minor_start +
tty->driver.name_base);
}
/* apply mtt override */
sir_tty_drv.qos_mtt_bits = qos_mtt_bits;
/* get a sir device instance for this driver */
dev = sirdev_get_instance(&sir_tty_drv, hwname);
if (!dev) {
ret = -ENODEV;
goto out;
}
/* allocate private device info block */
priv = kmalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
goto out_put;
memset(priv, 0, sizeof(*priv));
priv->magic = IRTTY_MAGIC;
priv->tty = tty;
priv->dev = dev;
/* serialize with start_dev - in case we were racing with ifup */
down(&irtty_sem);
dev->priv = priv;
tty->disc_data = priv;
up(&irtty_sem);
printk(KERN_INFO "%s - done\n", __FUNCTION__);
return 0;
out_put:
sirdev_put_instance(dev);
out:
MOD_DEC_USE_COUNT;
return ret;
}
/*
* Function irtty_close (tty)
*
* Close down a IrDA channel. This means flushing out any pending queues,
* and then restoring the TTY line discipline to what it was before it got
* hooked to IrDA (which usually is TTY again).
*/
static void irtty_close(struct tty_struct *tty)
{
struct sirtty_cb *priv = tty->disc_data;
if (!priv || priv->magic != IRTTY_MAGIC)
return;
/* Hm, with a dongle attached the dongle driver wants
* to close the dongle - which requires the use of
* some tty write and/or termios or ioctl operations.
* Are we allowed to call those when already requested
* to shutdown the ldisc?
* If not, we should somehow mark the dev being staled.
* Question remains, how to close the dongle in this case...
* For now let's assume we are granted to issue tty driver calls
* until we return here from the ldisc close. I'm just wondering
* how this behaves with hotpluggable serial hardware like
* rs232-pcmcia card or usb-serial...
*
* priv->tty = NULL?;
*/
/* we are dead now */
tty->disc_data = 0;
sirdev_put_instance(priv->dev);
/* Stop tty */
irtty_stop_receiver(tty, TRUE);
tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
if (tty->driver.stop)
tty->driver.stop(tty);
kfree(priv);
MOD_DEC_USE_COUNT;
}
/* ------------------------------------------------------- */
static struct tty_ldisc irda_ldisc = {
.magic = TTY_LDISC_MAGIC,
.name = "irda",
.flags = 0,
.open = irtty_open,
.close = irtty_close,
.read = NULL,
.write = NULL,
.ioctl = irtty_ioctl,
.poll = NULL,
.receive_buf = irtty_receive_buf,
.receive_room = irtty_receive_room,
.write_wakeup = irtty_write_wakeup,
};
/* ------------------------------------------------------- */
static int __init irtty_sir_init(void)
{
int err;
if ((err = tty_register_ldisc(N_IRDA, &irda_ldisc)) != 0)
ERROR("IrDA: can't register line discipline (err = %d)\n",
err);
return err;
}
static void __exit irtty_sir_cleanup(void)
{
int err;
if ((err = tty_register_ldisc(N_IRDA, NULL))) {
ERROR("%s(), can't unregister line discipline (err = %d)\n",
__FUNCTION__, err);
}
}
module_init(irtty_sir_init);
module_exit(irtty_sir_cleanup);
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("IrDA TTY device driver");
MODULE_LICENSE("GPL");
drivers/net/irda/irtty-sir.h 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir_tty.h: definitions for the irtty_sir client driver (former irtty)
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#ifndef IRTTYSIR_H
#define IRTTYSIR_H
#include <net/irda/irda.h>
#include <net/irda/irda_device.h> // chipio_t
#define IRTTY_IOC_MAGIC 'e'
#define IRTTY_IOCTDONGLE _IO(IRTTY_IOC_MAGIC, 1)
#define IRTTY_IOCGET _IOR(IRTTY_IOC_MAGIC, 2, struct irtty_info)
#define IRTTY_IOC_MAXNR 2
struct sirtty_cb {
magic_t magic;
struct sir_dev *dev;
struct tty_struct *tty;
chipio_t io; /* IrDA controller information */
};
#endif
drivers/net/irda/sir-dev.h 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir.h: include file for irda-sir device abstraction layer
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#ifndef IRDA_SIR_H
#define IRDA_SIR_H
#include <linux/netdevice.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h> // iobuff_t
/* FIXME: unify irda_request with sir_fsm! */
struct irda_request {
struct list_head lh_request;
unsigned long pending;
void (*func)(void *);
void *data;
struct timer_list timer;
};
struct sir_fsm {
struct semaphore sem;
struct irda_request rq;
unsigned state, substate;
int param;
int result;
};
#define SIRDEV_STATE_WAIT_TX_COMPLETE 0x0100
/* substates for wait_tx_complete */
#define SIRDEV_STATE_WAIT_XMIT 0x0101
#define SIRDEV_STATE_WAIT_UNTIL_SENT 0x0102
#define SIRDEV_STATE_TX_DONE 0x0103
#define SIRDEV_STATE_DONGLE_OPEN 0x0300
/* 0x0301-0x03ff reserved for individual dongle substates */
#define SIRDEV_STATE_DONGLE_CLOSE 0x0400
/* 0x0401-0x04ff reserved for individual dongle substates */
#define SIRDEV_STATE_SET_DTR_RTS 0x0500
#define SIRDEV_STATE_SET_SPEED 0x0700
#define SIRDEV_STATE_DONGLE_CHECK 0x0800
#define SIRDEV_STATE_DONGLE_RESET 0x0900
/* 0x0901-0x09ff reserved for individual dongle substates */
#define SIRDEV_STATE_DONGLE_SPEED 0x0a00
/* 0x0a01-0x0aff reserved for individual dongle substates */
#define SIRDEV_STATE_PORT_SPEED 0x0b00
#define SIRDEV_STATE_DONE 0x0c00
#define SIRDEV_STATE_ERROR 0x0d00
#define SIRDEV_STATE_COMPLETE 0x0e00
#define SIRDEV_STATE_DEAD 0xffff
struct sir_dev;
struct dongle_driver {
struct module *owner;
const char *driver_name;
IRDA_DONGLE type;
int (*open)(struct sir_dev *dev);
int (*close)(struct sir_dev *dev);
int (*reset)(struct sir_dev *dev);
int (*set_speed)(struct sir_dev *dev, unsigned speed);
struct list_head dongle_list;
};
struct sir_driver {
struct module *owner;
const char *driver_name;
int qos_mtt_bits;
int (*chars_in_buffer)(struct sir_dev *dev);
void (*wait_until_sent)(struct sir_dev *dev);
int (*set_speed)(struct sir_dev *dev, unsigned speed);
int (*set_dtr_rts)(struct sir_dev *dev, int dtr, int rts);
int (*do_write)(struct sir_dev *dev, const unsigned char *ptr, size_t len);
int (*start_dev)(struct sir_dev *dev);
int (*stop_dev)(struct sir_dev *dev);
};
/* exported */
extern int irda_register_dongle(struct dongle_driver *new);
extern int irda_unregister_dongle(struct dongle_driver *drv);
extern struct sir_dev * sirdev_get_instance(const struct sir_driver *drv, const char *name);
extern int sirdev_put_instance(struct sir_dev *self);
extern int sirdev_set_dongle(struct sir_dev *dev, IRDA_DONGLE type);
extern void sirdev_write_complete(struct sir_dev *dev);
extern int sirdev_receive(struct sir_dev *dev, const unsigned char *cp, size_t count);
/* not exported */
extern int sirdev_get_dongle(struct sir_dev *self, IRDA_DONGLE type);
extern int sirdev_put_dongle(struct sir_dev *self);
extern int sirdev_raw_write(struct sir_dev *dev, const char *buf, int len);
extern int sirdev_raw_read(struct sir_dev *dev, char *buf, int len);
extern void sirdev_enable_rx(struct sir_dev *dev);
extern int sirdev_schedule_request(struct sir_dev *dev, int state, unsigned param);
extern int __init irda_thread_create(void);
extern void __exit irda_thread_join(void);
/* inline helpers */
static inline int sirdev_schedule_speed(struct sir_dev *dev, unsigned speed)
{
return sirdev_schedule_request(dev, SIRDEV_STATE_SET_SPEED, speed);
}
static inline int sirdev_schedule_dongle_open(struct sir_dev *dev, int dongle_id)
{
return sirdev_schedule_request(dev, SIRDEV_STATE_DONGLE_OPEN, dongle_id);
}
static inline int sirdev_schedule_dongle_close(struct sir_dev *dev)
{
return sirdev_schedule_request(dev, SIRDEV_STATE_DONGLE_CLOSE, 0);
}
static inline int sirdev_schedule_dtr_rts(struct sir_dev *dev, int dtr, int rts)
{
int dtrrts;
dtrrts = ((dtr) ? 0x02 : 0x00) | ((rts) ? 0x01 : 0x00);
return sirdev_schedule_request(dev, SIRDEV_STATE_SET_DTR_RTS, dtrrts);
}
#if 0
static inline int sirdev_schedule_mode(struct sir_dev *dev, int mode)
{
return sirdev_schedule_request(dev, SIRDEV_STATE_SET_MODE, mode);
}
#endif
struct sir_dev {
struct net_device *netdev;
struct net_device_stats stats;
struct irlap_cb *irlap;
struct qos_info qos;
char hwname[32];
struct sir_fsm fsm;
atomic_t enable_rx;
spinlock_t tx_lock;
u32 new_speed;
u32 flags;
unsigned speed;
iobuff_t tx_buff; /* Transmit buffer */
iobuff_t rx_buff; /* Receive buffer */
struct sk_buff *tx_skb;
const struct dongle_driver * dongle_drv;
const struct sir_driver * drv;
void *priv;
/* dongle callbacks to the SIR device */
int (*read)(struct sir_dev *, char *buf, int len);
int (*write)(struct sir_dev *, const char *buf, int len);
int (*set_dtr_rts)(struct sir_dev *, int dtr, int rts);
};
#endif /* IRDA_SIR_H */
drivers/net/irda/sir_core.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir_core.c: module core for irda-sir abstraction layer
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
/***************************************************************************/
MODULE_AUTHOR("Martin Diehl <info@mdiehl.de>");
MODULE_DESCRIPTION("IrDA SIR core");
MODULE_LICENSE("GPL");
/***************************************************************************/
EXPORT_SYMBOL(irda_register_dongle);
EXPORT_SYMBOL(irda_unregister_dongle);
EXPORT_SYMBOL(sirdev_get_instance);
EXPORT_SYMBOL(sirdev_put_instance);
EXPORT_SYMBOL(sirdev_set_dongle);
EXPORT_SYMBOL(sirdev_write_complete);
EXPORT_SYMBOL(sirdev_receive);
static int __init sir_core_init(void)
{
return irda_thread_create();
}
static void __exit sir_core_exit(void)
{
irda_thread_join();
}
module_init(sir_core_init);
module_exit(sir_core_exit);
drivers/net/irda/sir_dev.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir_dev.c: irda sir network device
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <net/irda/irda.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda_device.h>
#include "sir-dev.h"
/***************************************************************************/
void sirdev_enable_rx(struct sir_dev *dev)
{
if (unlikely(atomic_read(&dev->enable_rx)))
return;
/* flush rx-buffer - should also help in case of problems with echo cancelation */
dev->rx_buff.data = dev->rx_buff.head;
dev->tx_buff.len = 0;
atomic_set(&dev->enable_rx, 1);
}
static int sirdev_is_receiving(struct sir_dev *dev)
{
if (!atomic_read(&dev->enable_rx))
return 0;
return (dev->rx_buff.state != OUTSIDE_FRAME);
}
int sirdev_set_dongle(struct sir_dev *dev, IRDA_DONGLE type)
{
int err;
IRDA_DEBUG(3, "%s : requesting dongle %d.\n", __FUNCTION__, type);
err = sirdev_schedule_dongle_open(dev, type);
if (unlikely(err))
return err;
down(&dev->fsm.sem); /* block until config change completed */
err = dev->fsm.result;
up(&dev->fsm.sem);
return err;
}
/* used by dongle drivers for dongle programming */
int sirdev_raw_write(struct sir_dev *dev, const char *buf, int len)
{
int ret;
if (unlikely(len > dev->tx_buff.truesize))
return -ENOSPC;
spin_lock_bh(&dev->tx_lock); /* serialize with other tx operations */
while (dev->tx_buff.len > 0) { /* wait until tx idle */
spin_unlock_bh(&dev->tx_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(MSECS_TO_JIFFIES(10));
spin_lock_bh(&dev->tx_lock);
}
dev->tx_buff.data = dev->tx_buff.head;
memcpy(dev->tx_buff.data, buf, len);
ret = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
spin_unlock_bh(&dev->tx_lock);
return ret;
}
/* seems some dongle drivers may need this */
int sirdev_raw_read(struct sir_dev *dev, char *buf, int len)
{
int count;
if (atomic_read(&dev->enable_rx))
return -EIO; /* fail if we expect irda-frames */
count = (len < dev->rx_buff.len) ? len : dev->rx_buff.len;
if (count > 0)
memcpy(buf, dev->rx_buff.head, count);
/* forget trailing stuff */
dev->rx_buff.data = dev->rx_buff.head;
dev->rx_buff.len = 0;
dev->rx_buff.state = OUTSIDE_FRAME;
return count;
}
/**********************************************************************/
/* called from client driver - likely with bh-context - to indicate
* it made some progress with transmission. Hence we send the next
* chunk, if any, or complete the skb otherwise
*/
void sirdev_write_complete(struct sir_dev *dev)
{
struct sk_buff *skb;
int actual = 0;
int err;
spin_lock_bh(&dev->tx_lock);
IRDA_DEBUG(3, "%s() - dev->tx_buff.len = %d\n",
__FUNCTION__, dev->tx_buff.len);
if (likely(dev->tx_buff.len > 0)) {
/* Write data left in transmit buffer */
actual = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
if (likely(actual>0)) {
dev->tx_buff.data += actual;
dev->tx_buff.len -= actual;
}
else if (unlikely(actual<0)) {
/* could be dropped later when we have tx_timeout to recover */
ERROR("%s: drv->do_write failed (%d)\n", __FUNCTION__, actual);
if ((skb=dev->tx_skb) != NULL) {
dev->tx_skb = NULL;
dev_kfree_skb_any(skb);
dev->stats.tx_errors++;
dev->stats.tx_dropped++;
}
dev->tx_buff.len = 0;
}
if (dev->tx_buff.len > 0) {
spin_unlock_bh(&dev->tx_lock);
return;
}
}
/* we have finished now sending this skb.
* update statistics and free the skb.
* finally we check and trigger a pending speed change, if any.
* if not we switch to rx mode and wake the queue for further
* packets.
* note the scheduled speed request blocks until the lower
* client driver and the corresponding hardware has really
* finished sending all data (xmit fifo drained f.e.)
* before the speed change gets finally done and the queue
* re-activated.
*/
IRDA_DEBUG(5, "%s(), finished with frame!\n", __FUNCTION__);
if ((skb=dev->tx_skb) != NULL) {
dev->tx_skb = NULL;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
dev_kfree_skb_any(skb);
}
if (unlikely(dev->new_speed > 0)) {
IRDA_DEBUG(5, "%s(), Changing speed!\n", __FUNCTION__);
err = sirdev_schedule_speed(dev, dev->new_speed);
if (unlikely(err)) {
/* should never happen
* forget the speed change and hope the stack recovers
*/
ERROR("%s - schedule speed change failed: %d\n", __FUNCTION__, err);
netif_wake_queue(dev->netdev);
}
/* else: success
* speed change in progress now
* on completion dev->new_speed gets cleared,
* rx-reenabled and the queue restarted
*/
}
else {
sirdev_enable_rx(dev);
netif_wake_queue(dev->netdev);
}
spin_unlock_bh(&dev->tx_lock);
}
/* called from client driver - likely with bh-context - to give us
* some more received bytes. We put them into the rx-buffer,
* normally unwrapping and building LAP-skb's (unless rx disabled)
*/
int sirdev_receive(struct sir_dev *dev, const unsigned char *cp, size_t count)
{
if (!dev || !dev->netdev) {
IRDA_DEBUG(0, "%s(), not ready yet!\n", __FUNCTION__);
/* Use WARNING instead of IRDA_DEBUG */
return -1;
}
if (!dev->irlap) {
IRDA_DEBUG(0, "%s - too early: %p / %d!\n", __FUNCTION__, cp, count);
/* Use WARNING instead of IRDA_DEBUG */
return -1;
}
if (cp==NULL) {
/* error already at lower level receive
* just update stats and set media busy
*/
irda_device_set_media_busy(dev->netdev, TRUE);
dev->stats.rx_dropped++;
printk(KERN_INFO "%s; rx-drop: %d\n", __FUNCTION__, count);
return 0;
}
/* Read the characters into the buffer */
while (count--) {
if (likely(atomic_read(&dev->enable_rx))) {
/* Unwrap and destuff one byte */
async_unwrap_char(dev->netdev, &dev->stats,
&dev->rx_buff, *cp++);
}
else {
/* rx not enabled: save the raw bytes and never
* trigger any netif_rx. The received bytes are flushed
* later when we re-enable rx but might be read meanwhile
* by the dongle driver.
*/
dev->rx_buff.data[dev->rx_buff.len++] = *cp++;
}
/* What should we do when the buffer is full? */
if (unlikely(dev->rx_buff.len == dev->rx_buff.truesize))
dev->rx_buff.len = 0;
}
return 0;
}
/**********************************************************************/
/* callbacks from network layer */
static struct net_device_stats *sirdev_get_stats(struct net_device *ndev)
{
struct sir_dev *dev = ndev->priv;
return (dev) ? &dev->stats : NULL;
}
static int sirdev_hard_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct sir_dev *dev = ndev->priv;
int actual = 0;
int err;
s32 speed;
ASSERT(dev != NULL, return 0;);
netif_stop_queue(ndev);
IRDA_DEBUG(3, "%s(), skb->len = %d\n", __FUNCTION__, skb->len);
speed = irda_get_next_speed(skb);
if ((speed != dev->speed) && (speed != -1)) {
if (!skb->len) {
err = sirdev_schedule_speed(dev, speed);
if (unlikely(err == -EWOULDBLOCK)) {
/* Failed to initiate the speed change, likely the fsm
* is still busy (pretty unlikely, but...)
* We refuse to accept the skb and return with the queue
* stopped so the network layer will retry after the
* fsm completes and wakes the queue.
*/
return 1;
}
else if (unlikely(err)) {
/* other fatal error - forget the speed change and
* hope the stack will recover somehow
*/
netif_start_queue(ndev);
}
/* else: success
* speed change in progress now
* on completion the queue gets restarted
*/
dev_kfree_skb_any(skb);
return 0;
} else
dev->new_speed = speed;
}
/* Init tx buffer*/
dev->tx_buff.data = dev->tx_buff.head;
/* Check problems */
if(spin_is_locked(&dev->tx_lock)) {
IRDA_DEBUG(3, "%s(), write not completed\n", __FUNCTION__);
}
/* serialize with write completion */
spin_lock_bh(&dev->tx_lock);
/* Copy skb to tx_buff while wrapping, stuffing and making CRC */
dev->tx_buff.len = async_wrap_skb(skb, dev->tx_buff.data, dev->tx_buff.truesize);
/* transmission will start now - disable receive.
* if we are just in the middle of an incoming frame,
* treat it as collision. probably it's a good idea to
* reset the rx_buf OUTSIDE_FRAME in this case too?
*/
atomic_set(&dev->enable_rx, 0);
if (unlikely(sirdev_is_receiving(dev)))
dev->stats.collisions++;
actual = dev->drv->do_write(dev, dev->tx_buff.data, dev->tx_buff.len);
if (likely(actual > 0)) {
dev->tx_skb = skb;
ndev->trans_start = jiffies;
dev->tx_buff.data += actual;
dev->tx_buff.len -= actual;
}
else if (unlikely(actual < 0)) {
/* could be dropped later when we have tx_timeout to recover */
ERROR("%s: drv->do_write failed (%d)\n", __FUNCTION__, actual);
dev_kfree_skb_any(skb);
dev->stats.tx_errors++;
dev->stats.tx_dropped++;
netif_wake_queue(ndev);
}
spin_unlock_bh(&dev->tx_lock);
return 0;
}
/* called from network layer with rtnl hold */
static int sirdev_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
{
struct if_irda_req *irq = (struct if_irda_req *) rq;
struct sir_dev *dev = ndev->priv;
int ret = 0;
ASSERT(dev != NULL, return -1;);
IRDA_DEBUG(3, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, ndev->name, cmd);
switch (cmd) {
case SIOCSBANDWIDTH: /* Set bandwidth */
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else
ret = sirdev_schedule_speed(dev, irq->ifr_baudrate);
/* cannot sleep here for completion
* we are called from network layer with rtnl hold
*/
break;
case SIOCSDONGLE: /* Set dongle */
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else
ret = sirdev_schedule_dongle_open(dev, irq->ifr_dongle);
/* cannot sleep here for completion
* we are called from network layer with rtnl hold
*/
break;
case SIOCSMEDIABUSY: /* Set media busy */
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else
irda_device_set_media_busy(dev->netdev, TRUE);
break;
case SIOCGRECEIVING: /* Check if we are receiving right now */
irq->ifr_receiving = sirdev_is_receiving(dev);
break;
case SIOCSDTRRTS:
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else
ret = sirdev_schedule_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
/* cannot sleep here for completion
* we are called from network layer with rtnl hold
*/
break;
case SIOCSMODE:
#if 0
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else
ret = sirdev_schedule_mode(dev, irq->ifr_mode);
/* cannot sleep here for completion
* we are called from network layer with rtnl hold
*/
break;
#endif
default:
ret = -EOPNOTSUPP;
}
return ret;
}
/* ----------------------------------------------------------------------------- */
#define SIRBUF_ALLOCSIZE 4269 /* worst case size of a wrapped IrLAP frame */
static int sirdev_alloc_buffers(struct sir_dev *dev)
{
dev->rx_buff.truesize = SIRBUF_ALLOCSIZE;
dev->tx_buff.truesize = SIRBUF_ALLOCSIZE;
dev->rx_buff.head = kmalloc(dev->rx_buff.truesize, GFP_KERNEL);
if (dev->rx_buff.head == NULL)
return -ENOMEM;
memset(dev->rx_buff.head, 0, dev->rx_buff.truesize);
dev->tx_buff.head = kmalloc(dev->tx_buff.truesize, GFP_KERNEL);
if (dev->tx_buff.head == NULL) {
kfree(dev->rx_buff.head);
dev->rx_buff.head = NULL;
return -ENOMEM;
memset(dev->tx_buff.head, 0, dev->tx_buff.truesize);
}
dev->tx_buff.data = dev->tx_buff.head;
dev->rx_buff.data = dev->rx_buff.head;
dev->tx_buff.len = 0;
dev->rx_buff.len = 0;
dev->rx_buff.in_frame = FALSE;
dev->rx_buff.state = OUTSIDE_FRAME;
return 0;
};
static void sirdev_free_buffers(struct sir_dev *dev)
{
if (dev->rx_buff.head)
kfree(dev->rx_buff.head);
if (dev->tx_buff.head)
kfree(dev->tx_buff.head);
dev->rx_buff.head = dev->tx_buff.head = NULL;
}
static int sirdev_open(struct net_device *ndev)
{
struct sir_dev *dev = ndev->priv;
const struct sir_driver *drv = dev->drv;
if (!drv)
return -ENODEV;
lock_kernel(); /* serialize with rmmod */
/* increase the reference count of the driver module before doing serious stuff */
if (drv->owner && !try_inc_mod_count(drv->owner)) {
unlock_kernel();
return -ESTALE;
}
unlock_kernel();
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
if (sirdev_alloc_buffers(dev))
goto errout_dec;
if (!dev->drv->start_dev || dev->drv->start_dev(dev))
goto errout_free;
sirdev_enable_rx(dev);
netif_start_queue(ndev);
dev->irlap = irlap_open(ndev, &dev->qos, dev->hwname);
if (!dev->irlap)
goto errout_stop;
netif_wake_queue(ndev);
printk(KERN_INFO "%s - done, speed = %d\n", __FUNCTION__, dev->speed);
return 0;
errout_stop:
atomic_set(&dev->enable_rx, 0);
if (dev->drv->stop_dev)
dev->drv->stop_dev(dev);
errout_free:
sirdev_free_buffers(dev);
errout_dec:
if (drv->owner)
__MOD_DEC_USE_COUNT(drv->owner);
return -EAGAIN;
}
static int sirdev_close(struct net_device *ndev)
{
struct sir_dev *dev = ndev->priv;
const struct sir_driver *drv;
printk(KERN_INFO "%s\n", __FUNCTION__);
netif_stop_queue(ndev);
down(&dev->fsm.sem); /* block on pending config completion */
atomic_set(&dev->enable_rx, 0);
if (unlikely(!dev->irlap))
goto out;
irlap_close(dev->irlap);
dev->irlap = NULL;
drv = dev->drv;
if (unlikely(!drv || !dev->priv))
goto out;
if (drv->stop_dev)
drv->stop_dev(dev);
sirdev_free_buffers(dev);
lock_kernel();
if (drv->owner)
__MOD_DEC_USE_COUNT(drv->owner);
unlock_kernel();
out:
dev->speed = 0;
up(&dev->fsm.sem);
return 0;
}
/* ----------------------------------------------------------------------------- */
static int sirdev_init(struct net_device *ndev)
{
struct sir_dev *dev = ndev->priv;
SET_MODULE_OWNER(ndev);
/* Set up to be a normal IrDA network device driver */
irda_device_setup(ndev);
dev->flags = IFF_SIR | IFF_PIO;
/* Override the network functions we need to use */
ndev->hard_start_xmit = sirdev_hard_xmit;
ndev->open = sirdev_open;
ndev->stop = sirdev_close;
ndev->get_stats = sirdev_get_stats;
ndev->do_ioctl = sirdev_ioctl;
return 0;
}
struct sir_dev * sirdev_get_instance(const struct sir_driver *drv, const char *name)
{
struct net_device *ndev;
struct sir_dev *dev;
printk(KERN_INFO "%s - %s\n", __FUNCTION__, name);
/* instead of adding tests to protect against drv->do_write==NULL
* at several places we refuse to create a sir_dev instance for
* drivers which dont implement do_write.
*/
if (!drv || !drv->do_write)
return NULL;
/*
* Allocate new instance of the device
*/
dev = kmalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
printk(KERN_ERR "IrDA: Can't allocate memory for "
"IrDA control block!\n");
goto out;
}
memset(dev, 0, sizeof(*dev));
irda_init_max_qos_capabilies(&dev->qos);
dev->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
dev->qos.min_turn_time.bits = drv->qos_mtt_bits;
irda_qos_bits_to_value(&dev->qos);
strncpy(dev->hwname, name, sizeof(dev->hwname)-1);
ndev = kmalloc(sizeof(*ndev), GFP_KERNEL);
if (ndev == NULL)
goto out_freedev;
memset(ndev, 0, sizeof(*ndev));
atomic_set(&dev->enable_rx, 0);
dev->tx_skb = NULL;
spin_lock_init(&dev->tx_lock);
init_MUTEX(&dev->fsm.sem);
INIT_LIST_HEAD(&dev->fsm.rq.lh_request);
dev->fsm.rq.pending = 0;
init_timer(&dev->fsm.rq.timer);
dev->drv = drv;
dev->netdev = ndev;
ndev->priv = (void *) dev;
ndev->init = sirdev_init;
strcpy(ndev->name, "irda%d");
if (register_netdev(ndev)) {
ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
goto out_freenetdev;
}
return dev;
out_freenetdev:
kfree(ndev);
out_freedev:
kfree(dev);
out:
return NULL;
}
int sirdev_put_instance(struct sir_dev *dev)
{
int err = 0;
printk(KERN_INFO "%s\n", __FUNCTION__);
atomic_set(&dev->enable_rx, 0);
netif_carrier_off(dev->netdev);
netif_device_detach(dev->netdev);
if (dev->dongle_drv)
err = sirdev_schedule_dongle_close(dev);
if (err)
ERROR("%s - error %d\n", __FUNCTION__, err);
sirdev_close(dev->netdev);
down(&dev->fsm.sem);
dev->fsm.state = SIRDEV_STATE_DEAD; /* mark staled */
dev->dongle_drv = NULL;
dev->priv = NULL;
up(&dev->fsm.sem);
/* Remove netdevice */
if (dev->netdev)
unregister_netdev(dev->netdev);
kfree(dev);
return 0;
}
drivers/net/irda/sir_dongle.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir_dongle.c: manager for serial dongle protocol drivers
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/kmod.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
/**************************************************************************
*
* dongle registration and attachment
*
*/
static LIST_HEAD(dongle_list); /* list of registered dongle drivers */
static DECLARE_MUTEX(dongle_list_lock); /* protects the list */
int irda_register_dongle(struct dongle_driver *new)
{
struct list_head *entry;
struct dongle_driver *drv;
IRDA_DEBUG(0, "%s : registering dongle \"%s\" (%d).\n",
__FUNCTION__, new->driver_name, new->type);
down(&dongle_list_lock);
list_for_each(entry, &dongle_list) {
drv = list_entry(entry, struct dongle_driver, dongle_list);
if (new->type == drv->type) {
up(&dongle_list_lock);
return -EEXIST;
}
}
list_add(&new->dongle_list, &dongle_list);
up(&dongle_list_lock);
return 0;
}
int irda_unregister_dongle(struct dongle_driver *drv)
{
down(&dongle_list_lock);
list_del(&drv->dongle_list);
up(&dongle_list_lock);
return 0;
}
int sirdev_get_dongle(struct sir_dev *dev, IRDA_DONGLE type)
{
struct list_head *entry;
const struct dongle_driver *drv = NULL;
int err = -EINVAL;
#ifdef CONFIG_KMOD
char modname[30];
sprintf(modname, "irda-dongle-%d", type);
request_module(modname);
#endif
if (dev->dongle_drv != NULL)
return -EBUSY;
/* serialize access to the list of registered dongles */
down(&dongle_list_lock);
list_for_each(entry, &dongle_list) {
drv = list_entry(entry, struct dongle_driver, dongle_list);
if (drv->type == type)
break;
else
drv = NULL;
}
if (!drv) {
err = -ENODEV;
goto out_unlock; /* no such dongle */
}
/* handling of SMP races with dongle module removal - three cases:
* 1) dongle driver was already unregistered - then we haven't found the
* requested dongle above and are already out here
* 2) the module is already marked deleted but the driver is still
* registered - then the try_inc_mod_count() below will fail
* 3) the try_inc_mod_count() below succeeds before the module is marked
* deleted - then sys_delete_module() fails and prevents the removal
* because the module is in use.
*/
if (drv->owner && !try_inc_mod_count(drv->owner)) {
err = -ESTALE;
goto out_unlock; /* rmmod already pending */
}
/* Initialize dongle driver callbacks */
dev->read = sirdev_raw_read;
dev->write = sirdev_raw_write;
dev->set_dtr_rts = dev->drv->set_dtr_rts;
dev->dongle_drv = drv;
if (!drv->open || (err=drv->open(dev))!=0)
goto out_reject; /* failed to open driver */
up(&dongle_list_lock);
return 0;
out_reject:
dev->dongle_drv = NULL;
if (drv->owner)
__MOD_DEC_USE_COUNT(drv->owner);
out_unlock:
up(&dongle_list_lock);
return err;
}
int sirdev_put_dongle(struct sir_dev *dev)
{
const struct dongle_driver *drv = dev->dongle_drv;
if (drv) {
if (drv->close)
drv->close(dev); /* close this dongle instance */
dev->dongle_drv = NULL; /* unlink the dongle driver */
if (drv->owner)
__MOD_DEC_USE_COUNT(drv->owner);/* decrement driver's module refcount */
}
return 0;
}
drivers/net/irda/sir_kthread.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* sir_kthread.c: dedicated thread to process scheduled
* sir device setup requests
*
* Copyright (c) 2002 Martin Diehl
*
* 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/init.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
/**************************************************************************
*
* kIrDAd kernel thread and config state machine
*
*/
struct irda_request_queue {
struct list_head request_list;
spinlock_t lock;
task_t *thread;
struct completion exit;
wait_queue_head_t kick, done;
atomic_t num_pending;
};
static struct irda_request_queue irda_rq_queue;
static int irda_queue_request(struct irda_request *rq)
{
int ret = 0;
unsigned long flags;
if (!test_and_set_bit(0, &rq->pending)) {
spin_lock_irqsave(&irda_rq_queue.lock, flags);
list_add_tail(&rq->lh_request, &irda_rq_queue.request_list);
wake_up(&irda_rq_queue.kick);
atomic_inc(&irda_rq_queue.num_pending);
spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
ret = 1;
}
return ret;
}
static void irda_request_timer(unsigned long data)
{
struct irda_request *rq = (struct irda_request *)data;
unsigned long flags;
spin_lock_irqsave(&irda_rq_queue.lock, flags);
list_add_tail(&rq->lh_request, &irda_rq_queue.request_list);
wake_up(&irda_rq_queue.kick);
spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
}
static int irda_queue_delayed_request(struct irda_request *rq, unsigned long delay)
{
int ret = 0;
struct timer_list *timer = &rq->timer;
if (!test_and_set_bit(0, &rq->pending)) {
timer->expires = jiffies + delay;
timer->function = irda_request_timer;
timer->data = (unsigned long)rq;
atomic_inc(&irda_rq_queue.num_pending);
add_timer(timer);
ret = 1;
}
return ret;
}
static void run_irda_queue(void)
{
unsigned long flags;
struct list_head *entry, *tmp;
struct irda_request *rq;
spin_lock_irqsave(&irda_rq_queue.lock, flags);
list_for_each_safe(entry, tmp, &irda_rq_queue.request_list) {
rq = list_entry(entry, struct irda_request, lh_request);
list_del_init(entry);
spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
clear_bit(0, &rq->pending);
rq->func(rq->data);
if (atomic_dec_and_test(&irda_rq_queue.num_pending))
wake_up(&irda_rq_queue.done);
spin_lock_irqsave(&irda_rq_queue.lock, flags);
}
spin_unlock_irqrestore(&irda_rq_queue.lock, flags);
}
static int irda_rt_prio = 0; /* MODULE_PARM? */
static int irda_thread(void *startup)
{
DECLARE_WAITQUEUE(wait, current);
daemonize();
strcpy(current->comm, "kIrDAd");
spin_lock_irq(&current->sig->siglock);
sigfillset(&current->blocked);
recalc_sigpending();
spin_unlock_irq(&current->sig->siglock);
set_fs(KERNEL_DS);
if (irda_rt_prio > 0) {
#if 0 /* works but requires EXPORT_SYMBOL(setscheduler) */
struct sched_param param;
param.sched_priority = irda_rt_prio;
setscheduler(0, SCHED_FIFO, &param);
#endif
#if 0 /* doesn't work - has some tendency to trigger instant reboot!
* looks like we would have to deactivate current on the
* runqueue - which is only possible inside of kernel/sched.h
*/
/* runqueues are per-cpu and we are current on this cpu. Hence
* The tasklist_lock with irq-off protects our runqueue too
* and we don't have to lock it (which would be impossible,
* because it is private in kernel/sched.c)
*/
read_lock_irq(&tasklist_lock);
current->rt_priority = (irda_rt_prio<MAX_RT_PRIO)
? irda_rt_prio : MAX_RT_PRIO-1;
current->policy = SCHED_FIFO;
current->prio = MAX_USER_RT_PRIO-1 - irda_rt_prio;
read_unlock_irq(&tasklist_lock);
#endif
}
irda_rq_queue.thread = current;
complete((struct completion *)startup);
while (irda_rq_queue.thread != NULL) {
set_task_state(current, TASK_UNINTERRUPTIBLE);
add_wait_queue(&irda_rq_queue.kick, &wait);
if (list_empty(&irda_rq_queue.request_list))
schedule();
else
set_task_state(current, TASK_RUNNING);
remove_wait_queue(&irda_rq_queue.kick, &wait);
run_irda_queue();
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,35)
reparent_to_init();
#endif
complete_and_exit(&irda_rq_queue.exit, 0);
/* never reached */
return 0;
}
static void flush_irda_queue(void)
{
if (atomic_read(&irda_rq_queue.num_pending)) {
DECLARE_WAITQUEUE(wait, current);
if (!list_empty(&irda_rq_queue.request_list))
run_irda_queue();
set_task_state(current, TASK_UNINTERRUPTIBLE);
add_wait_queue(&irda_rq_queue.done, &wait);
if (atomic_read(&irda_rq_queue.num_pending))
schedule();
else
set_task_state(current, TASK_RUNNING);
remove_wait_queue(&irda_rq_queue.done, &wait);
}
}
/* substate handler of the config-fsm to handle the cases where we want
* to wait for transmit completion before changing the port configuration
*/
static int irda_tx_complete_fsm(struct sir_dev *dev)
{
struct sir_fsm *fsm = &dev->fsm;
unsigned next_state, delay;
unsigned bytes_left;
do {
next_state = fsm->substate; /* default: stay in current substate */
delay = 0;
switch(fsm->substate) {
case SIRDEV_STATE_WAIT_XMIT:
if (dev->drv->chars_in_buffer)
bytes_left = dev->drv->chars_in_buffer(dev);
else
bytes_left = 0;
if (!bytes_left) {
next_state = SIRDEV_STATE_WAIT_UNTIL_SENT;
break;
}
if (dev->speed > 115200)
delay = (bytes_left*8*10000) / (dev->speed/100);
else if (dev->speed > 0)
delay = (bytes_left*10*10000) / (dev->speed/100);
else
delay = 0;
/* expected delay (usec) until remaining bytes are sent */
if (delay < 100) {
udelay(delay);
delay = 0;
break;
}
/* sleep some longer delay (msec) */
delay = (delay+999) / 1000;
break;
case SIRDEV_STATE_WAIT_UNTIL_SENT:
/* block until underlaying hardware buffer are empty */
if (dev->drv->wait_until_sent)
dev->drv->wait_until_sent(dev);
next_state = SIRDEV_STATE_TX_DONE;
break;
case SIRDEV_STATE_TX_DONE:
return 0;
default:
ERROR("%s - undefined state\n", __FUNCTION__);
return -EINVAL;
}
fsm->substate = next_state;
} while (delay == 0);
return delay;
}
/*
* Function irda_config_fsm
*
* State machine to handle the configuration of the device (and attached dongle, if any).
* This handler is scheduled for execution in kIrDAd context, so we can sleep.
* however, kIrDAd is shared by all sir_dev devices so we better don't sleep there too
* long. Instead, for longer delays we start a timer to reschedule us later.
* On entry, fsm->sem is always locked and the netdev xmit queue stopped.
* Both must be unlocked/restarted on completion - but only on final exit.
*/
static void irda_config_fsm(void *data)
{
struct sir_dev *dev = data;
struct sir_fsm *fsm = &dev->fsm;
int next_state;
int ret = -1;
unsigned delay;
IRDA_DEBUG(2, "%s(), <%ld>\n", __FUNCTION__, jiffies);
do {
IRDA_DEBUG(3, "%s - state=0x%04x / substate=0x%04x\n",
__FUNCTION__, fsm->state, fsm->substate);
next_state = fsm->state;
delay = 0;
switch(fsm->state) {
case SIRDEV_STATE_DONGLE_OPEN:
if (dev->dongle_drv != NULL) {
ret = sirdev_put_dongle(dev);
if (ret) {
fsm->result = -EINVAL;
next_state = SIRDEV_STATE_ERROR;
break;
}
}
/* Initialize dongle */
ret = sirdev_get_dongle(dev, fsm->param);
if (ret) {
fsm->result = ret;
next_state = SIRDEV_STATE_ERROR;
break;
}
/* Dongles are powered through the modem control lines which
* were just set during open. Before resetting, let's wait for
* the power to stabilize. This is what some dongle drivers did
* in open before, while others didn't - should be safe anyway.
*/
delay = 50;
fsm->substate = SIRDEV_STATE_DONGLE_RESET;
next_state = SIRDEV_STATE_DONGLE_RESET;
fsm->param = 9600;
break;
case SIRDEV_STATE_DONGLE_CLOSE:
/* shouldn't we just treat this as success=? */
if (dev->dongle_drv == NULL) {
fsm->result = -EINVAL;
next_state = SIRDEV_STATE_ERROR;
break;
}
ret = sirdev_put_dongle(dev);
if (ret) {
fsm->result = ret;
next_state = SIRDEV_STATE_ERROR;
break;
}
next_state = SIRDEV_STATE_DONE;
break;
case SIRDEV_STATE_SET_DTR_RTS:
if (dev->drv->set_dtr_rts) {
int dtr, rts;
dtr = (fsm->param&0x02) ? TRUE : FALSE;
rts = (fsm->param&0x01) ? TRUE : FALSE;
ret = dev->drv->set_dtr_rts(dev,dtr,rts);
}
else
ret = -EINVAL;
next_state = SIRDEV_STATE_DONE;
break;
case SIRDEV_STATE_SET_SPEED:
fsm->substate = SIRDEV_STATE_WAIT_XMIT;
next_state = SIRDEV_STATE_DONGLE_CHECK;
break;
case SIRDEV_STATE_DONGLE_CHECK:
ret = irda_tx_complete_fsm(dev);
if (ret < 0) {
fsm->result = ret;
next_state = SIRDEV_STATE_ERROR;
break;
}
if ((delay=ret) != 0)
break;
if (dev->dongle_drv) {
fsm->substate = SIRDEV_STATE_DONGLE_RESET;
next_state = SIRDEV_STATE_DONGLE_RESET;
}
else {
dev->speed = fsm->param;
next_state = SIRDEV_STATE_PORT_SPEED;
}
break;
case SIRDEV_STATE_DONGLE_RESET:
if (dev->dongle_drv->reset) {
ret = dev->dongle_drv->reset(dev);
if (ret < 0) {
fsm->result = ret;
next_state = SIRDEV_STATE_ERROR;
break;
}
}
else
ret = 0;
if ((delay=ret) == 0) {
/* set serial port according to dongle default speed */
if (dev->drv->set_speed)
dev->drv->set_speed(dev, dev->speed);
fsm->substate = SIRDEV_STATE_DONGLE_SPEED;
next_state = SIRDEV_STATE_DONGLE_SPEED;
}
break;
case SIRDEV_STATE_DONGLE_SPEED:
if (dev->dongle_drv->reset) {
ret = dev->dongle_drv->set_speed(dev, fsm->param);
if (ret < 0) {
fsm->result = ret;
next_state = SIRDEV_STATE_ERROR;
break;
}
}
else
ret = 0;
if ((delay=ret) == 0)
next_state = SIRDEV_STATE_PORT_SPEED;
break;
case SIRDEV_STATE_PORT_SPEED:
/* Finally we are ready to change the serial port speed */
if (dev->drv->set_speed)
dev->drv->set_speed(dev, dev->speed);
dev->new_speed = 0;
next_state = SIRDEV_STATE_DONE;
break;
case SIRDEV_STATE_DONE:
/* Signal network layer so it can send more frames */
netif_wake_queue(dev->netdev);
next_state = SIRDEV_STATE_COMPLETE;
break;
default:
ERROR("%s - undefined state\n", __FUNCTION__);
fsm->result = -EINVAL;
/* fall thru */
case SIRDEV_STATE_ERROR:
ERROR("%s - error: %d\n", __FUNCTION__, fsm->result);
#if 0 /* don't enable this before we have netdev->tx_timeout to recover */
netif_stop_queue(dev->netdev);
#else
netif_wake_queue(dev->netdev);
#endif
/* fall thru */
case SIRDEV_STATE_COMPLETE:
/* config change finished, so we are not busy any longer */
sirdev_enable_rx(dev);
printk(KERN_INFO "%s - up\n", __FUNCTION__);
up(&fsm->sem);
return;
}
fsm->state = next_state;
} while(!delay);
irda_queue_delayed_request(&fsm->rq, MSECS_TO_JIFFIES(delay));
}
/* schedule some device configuration task for execution by kIrDAd
* on behalf of the above state machine.
* can be called from process or interrupt/tasklet context.
*/
int sirdev_schedule_request(struct sir_dev *dev, int initial_state, unsigned param)
{
struct sir_fsm *fsm = &dev->fsm;
int xmit_was_down;
// IRDA_DEBUG(2, "%s - state=0x%04x / param=%u\n", __FUNCTION__, initial_state, param);
printk(KERN_INFO "%s - state=0x%04x / param=%u\n", __FUNCTION__, initial_state, param);
if (in_interrupt()) {
if (down_trylock(&fsm->sem)) {
IRDA_DEBUG(1, "%s(), state machine busy!\n", __FUNCTION__);
return -EWOULDBLOCK;
}
}
else
down(&fsm->sem);
printk(KERN_INFO "%s - down\n", __FUNCTION__);
if (fsm->state == SIRDEV_STATE_DEAD) {
/* race with sirdev_close should never happen */
ERROR("%s(), instance staled!\n", __FUNCTION__);
printk(KERN_INFO "%s - up\n", __FUNCTION__);
up(&fsm->sem);
return -ESTALE; /* or better EPIPE? */
}
xmit_was_down = netif_queue_stopped(dev->netdev);
netif_stop_queue(dev->netdev);
atomic_set(&dev->enable_rx, 0);
fsm->state = initial_state;
fsm->param = param;
fsm->result = 0;
INIT_LIST_HEAD(&fsm->rq.lh_request);
fsm->rq.pending = 0;
fsm->rq.func = irda_config_fsm;
fsm->rq.data = dev;
if (!irda_queue_request(&fsm->rq)) { /* returns 0 on error! */
atomic_set(&dev->enable_rx, 1);
if (!xmit_was_down)
netif_wake_queue(dev->netdev);
printk(KERN_INFO "%s - up\n", __FUNCTION__);
up(&fsm->sem);
return -EAGAIN;
}
return 0;
}
int __init irda_thread_create(void)
{
struct completion startup;
int pid;
spin_lock_init(&irda_rq_queue.lock);
irda_rq_queue.thread = NULL;
INIT_LIST_HEAD(&irda_rq_queue.request_list);
init_waitqueue_head(&irda_rq_queue.kick);
init_waitqueue_head(&irda_rq_queue.done);
atomic_set(&irda_rq_queue.num_pending, 0);
init_completion(&startup);
pid = kernel_thread(irda_thread, &startup, CLONE_FS|CLONE_FILES);
if (pid <= 0)
return -EAGAIN;
else
wait_for_completion(&startup);
return 0;
}
void __exit irda_thread_join(void)
{
if (irda_rq_queue.thread) {
flush_irda_queue();
init_completion(&irda_rq_queue.exit);
irda_rq_queue.thread = NULL;
wake_up(&irda_rq_queue.kick);
wait_for_completion(&irda_rq_queue.exit);
}
}
drivers/net/irda/tekram-sir.c 0 → 100644
View file @ a2252286
/*********************************************************************
*
* Filename: tekram.c
* Version: 1.3
* Description: Implementation of the Tekram IrMate IR-210B dongle
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Wed Oct 21 20:02:35 1998
* Modified at: Sun Oct 27 22:02:38 2002
* Modified by: Martin Diehl <mad@mdiehl.de>
*
* Copyright (c) 1998-1999 Dag Brattli,
* Copyright (c) 2002 Martin Diehl,
* 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.
*
* Neither Dag Brattli nor University of Troms admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
MODULE_PARM(tekram_delay, "i");
MODULE_PARM_DESC(tekram_delay, "tekram dongle write complete delay");
static int tekram_delay = 50; /* default is 50 ms */
static int tekram_open(struct sir_dev *);
static int tekram_close(struct sir_dev *);
static int tekram_change_speed(struct sir_dev *, unsigned);
static int tekram_reset(struct sir_dev *);
#define TEKRAM_115200 0x00
#define TEKRAM_57600 0x01
#define TEKRAM_38400 0x02
#define TEKRAM_19200 0x03
#define TEKRAM_9600 0x04
#define TEKRAM_PW 0x10 /* Pulse select bit */
static struct dongle_driver tekram = {
.owner = THIS_MODULE,
.driver_name = "Tekram IR-210B",
.type = IRDA_TEKRAM_DONGLE,
.open = tekram_open,
.close = tekram_close,
.reset = tekram_reset,
.set_speed = tekram_change_speed,
};
int __init tekram_sir_init(void)
{
if (tekram_delay < 1 || tekram_delay>500)
tekram_delay = 200;
return irda_register_dongle(&tekram);
}
void __exit tekram_sir_cleanup(void)
{
irda_unregister_dongle(&tekram);
}
#define TEKRAM_STATE_POWERED (SIRDEV_STATE_DONGLE_OPEN + 1)
static int tekram_open(struct sir_dev *dev)
{
unsigned delay = 0;
unsigned next_state = dev->fsm.substate;
struct qos_info *qos = &dev->qos;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
switch(dev->fsm.substate) {
case SIRDEV_STATE_DONGLE_OPEN:
dev->set_dtr_rts(dev, TRUE, TRUE);
next_state = TEKRAM_STATE_POWERED;
delay = 50;
break;
case TEKRAM_STATE_POWERED:
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
irda_qos_bits_to_value(qos);
return 0;
default:
ERROR("%s - undefined state\n", __FUNCTION__);
return -EINVAL;
}
dev->fsm.substate = next_state;
return delay;
}
static int tekram_close(struct sir_dev *dev)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
/* Power off dongle */
dev->set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function tekram_change_speed (dev, state, speed)
*
* Set the speed for the Tekram IRMate 210 type dongle. Warning, this
* function must be called with a process context!
*
* Algorithm
* 1. clear DTR
* 2. set RTS, and wait at least 7 us
* 3. send Control Byte to the IR-210 through TXD to set new baud rate
* wait until the stop bit of Control Byte is sent (for 9600 baud rate,
* it takes about 100 msec)
*
* [oops, why 100 msec? sending 1 byte (10 bits) takes 1.05 msec
* - is this probably to compensate for delays in tty layer?]
*
* 5. clear RTS (return to NORMAL Operation)
* 6. wait at least 50 us, new setting (baud rate, etc) takes effect here
* after
*/
#define TEKRAM_STATE_WAIT_SPEED (SIRDEV_STATE_DONGLE_SPEED + 1)
static int tekram_change_speed(struct sir_dev *dev, unsigned speed)
{
unsigned delay = 0;
unsigned next_state = dev->fsm.substate;
u8 byte;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
switch(dev->fsm.substate) {
case SIRDEV_STATE_DONGLE_SPEED:
switch (speed) {
default:
speed = 9600;
/* fall thru */
case 9600:
byte = TEKRAM_PW|TEKRAM_9600;
break;
case 19200:
byte = TEKRAM_PW|TEKRAM_19200;
break;
case 38400:
byte = TEKRAM_PW|TEKRAM_38400;
break;
case 57600:
byte = TEKRAM_PW|TEKRAM_57600;
break;
case 115200:
byte = TEKRAM_115200;
break;
}
/* Set DTR, Clear RTS */
dev->set_dtr_rts(dev, TRUE, FALSE);
/* Wait at least 7us */
udelay(14);
/* Write control byte */
dev->write(dev, &byte, 1);
dev->speed = speed;
next_state = TEKRAM_STATE_WAIT_SPEED;
delay = tekram_delay; /* default: 50 ms */
break;
case TEKRAM_STATE_WAIT_SPEED:
/* Set DTR, Set RTS */
dev->set_dtr_rts(dev, TRUE, TRUE);
udelay(50);
return 0;
default:
ERROR("%s - undefined state\n", __FUNCTION__);
return -EINVAL;
}
dev->fsm.substate = next_state;
return delay;
}
/*
* Function tekram_reset (driver)
*
* This function resets the tekram dongle. Warning, this function
* must be called with a process context!!
*
* Algorithm:
* 0. Clear RTS and DTR, and wait 50 ms (power off the IR-210 )
* 1. clear RTS
* 2. set DTR, and wait at least 1 ms
* 3. clear DTR to SPACE state, wait at least 50 us for further
* operation
*/
#define TEKRAM_STATE_WAIT_RESET (SIRDEV_STATE_DONGLE_RESET + 1)
static int tekram_reset(struct sir_dev *dev)
{
unsigned delay = 0;
unsigned next_state = dev->fsm.substate;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
switch(dev->fsm.substate) {
case SIRDEV_STATE_DONGLE_RESET:
/* Clear DTR, Set RTS */
dev->set_dtr_rts(dev, FALSE, TRUE);
next_state = TEKRAM_STATE_WAIT_RESET;
delay = 1; /* Should sleep 1 ms */
break;
case TEKRAM_STATE_WAIT_RESET:
/* Set DTR, Set RTS */
dev->set_dtr_rts(dev, TRUE, TRUE);
/* Wait at least 50 us */
udelay(75);
return 0;
default:
ERROR("%s - undefined state\n", __FUNCTION__);
return -EINVAL;
}
dev->fsm.substate = next_state;
return delay;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("Tekram IrMate IR-210B dongle driver");
MODULE_LICENSE("GPL");
module_init(tekram_sir_init);
module_exit(tekram_sir_cleanup);
net/irda/irlap_frame.c
View file @ a2252286
......@@ -1280,6 +1280,20 @@ int irlap_driver_rcv(struct sk_buff *skb, struct net_device *dev,
return -1;
}
/* We are no longer an "old" protocol, so we need to handle
* share and non linear skbs. This should never happen, so
* we don't need to be clever about it. Jean II */
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
ERROR("%s: can't clone shared skb!\n", __FUNCTION__);
return -1;
}
if (skb_is_nonlinear(skb))
if (skb_linearize(skb, GFP_ATOMIC) != 0) {
ERROR("%s: can't linearize skb!\n", __FUNCTION__);
dev_kfree_skb(skb);
return -1;
}
/* Check if frame is large enough for parsing */
if (skb->len < 2) {
ERROR("%s: frame to short!\n", __FUNCTION__);
......
net/irda/irsyms.c
View file @ a2252286
......@@ -180,13 +180,16 @@ EXPORT_SYMBOL(irtty_set_packet_mode);
__u32 irda_debug = IRDA_DEBUG_LEVEL;
#endif
/* Packet type handler.
* Tell the kernel how IrDA packets should be handled.
*/
static struct packet_type irda_packet_type =
{
0, /* MUTTER ntohs(ETH_P_IRDA),*/
NULL,
irlap_driver_rcv,
NULL,
NULL,
.type = __constant_htons(ETH_P_IRDA),
.dev = NULL, /* Wildcard : All devices */
.func = irlap_driver_rcv, /* Packet type handler irlap_frame.c */
.data = (void*) 1, /* Understand shared skbs */
//.next = NULL,
};
/*
......@@ -267,7 +270,6 @@ int __init irda_init(void)
irsock_init();
/* Add IrDA packet type (Start receiving packets) */
irda_packet_type.type = htons(ETH_P_IRDA);
dev_add_pack(&irda_packet_type);
/* Notifier for Interface changes */
......
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