From 5b68efc40a339a8ae3d9d137c7b9af809c3f5519 Mon Sep 17 00:00:00 2001 From: tzafrir Date: Thu, 17 May 2007 19:34:32 +0000 Subject: * Tested with zaptel-1.2.17.1 * Add D-Channel TX, RX and BAD frames count in /proc/xpp/XBUS-*/XPD-*/bri_info * Adjust output of xpp_sync script. Pad for 8 port BRI. * Added a debugging module parport_debug (not compiled by default). * Added an optional patch to zaptel: - compiles only if ZAPTEL_SYNC_TICK is defined - Allow interested driver to register for "sync" notification. - Does not affect drivers that do not use this feature. * Added external synchronization feature: - Only if ZAPTEL_SYNC_TICK feature is compiled in - Than XPP may be synchronized by another card (e.g: an Astribank with FXS can be synchronized by a Digium PRI card). - May be enabled/disabled in runtime via the 'sync_tick_active' module parameter to the xpp.ko module. * Fixed a potential bug in D-Channel hexdump printing. * New visual indications in BRI leds: - Constant ON RED/GREEN: Shows the port type -- NT/TE. - Very fast "double blink": Layer1 work, no D-Channel yet. - Steady blinking (1/2 sec): D-Channel trafic detected. * xpp_fxloader moved to /usr/share/zaptel . * adj_clock removed: never really used. * Debugfs code now disabled by default. * Now we have Zaptel::Hardware and a sample zaptel_hardware script (not (installed by default). * We also have a sample perl zapconf (not installed by default) which aims at replacing genzaptelconf (sans the modules detection). git-svn-id: http://svn.digium.com/svn/zaptel/branches/1.2@2529 5390a7c7-147a-4af0-8ec9-7488f05a26cb --- xpp/parport_debug.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 xpp/parport_debug.c (limited to 'xpp/parport_debug.c') diff --git a/xpp/parport_debug.c b/xpp/parport_debug.c new file mode 100644 index 0000000..93049ef --- /dev/null +++ b/xpp/parport_debug.c @@ -0,0 +1,113 @@ +/* + * Written by Oron Peled + * Copyright (C) 2007, Xorcom + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ +#include + +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0) +# warning "This module is tested only with 2.6 kernels" +#endif + +#include +#include +#include +#include "parport_debug.h" + +static struct parport *debug_sync_parport = NULL; +static int parport_toggles[8]; /* 8 bit flip-flop */ + +void flip_parport_bit(unsigned char bitnum) +{ + static unsigned char last_value; + spinlock_t lock = SPIN_LOCK_UNLOCKED; + unsigned long flags; + unsigned char mask; + unsigned char value; + + if(!debug_sync_parport) { + if(printk_ratelimit()) { + printk(KERN_NOTICE "%s: no debug parallel port\n", + THIS_MODULE->name); + } + return; + } + BUG_ON(bitnum > 7); + mask = 1 << bitnum; + spin_lock_irqsave(&lock, flags); + value = last_value & ~mask; + if(parport_toggles[bitnum] % 2) /* square wave */ + value |= mask; + last_value = value; + parport_toggles[bitnum]++; + spin_unlock_irqrestore(&lock, flags); + parport_write_data(debug_sync_parport, value); +} +EXPORT_SYMBOL(flip_parport_bit); + +static void parport_attach(struct parport *port) +{ + printk(KERN_INFO "%s: Using %s for debugging\n", THIS_MODULE->name, port->name); + if(debug_sync_parport) { + printk(KERN_ERR "%s: Using %s, ignore new attachment %s\n", + THIS_MODULE->name, debug_sync_parport->name, port->name); + return; + } + parport_get_port(port); + debug_sync_parport = port; +} + +static void parport_detach(struct parport *port) +{ + printk(KERN_INFO "%s: Releasing %s\n", THIS_MODULE->name, port->name); + if(debug_sync_parport != port) { + printk(KERN_ERR "%s: Using %s, ignore new detachment %s\n", + THIS_MODULE->name, debug_sync_parport->name, port->name); + return; + } + parport_put_port(debug_sync_parport); + debug_sync_parport = NULL; +} + +static struct parport_driver debug_parport_driver = { + .name = "parport_debug", + .attach = parport_attach, + .detach = parport_detach, +}; + +int __init parallel_dbg_init(void) +{ + int ret; + + ret = parport_register_driver(&debug_parport_driver); + return ret; +} + +void __exit parallel_dbg_cleanup(void) +{ + parport_unregister_driver(&debug_parport_driver); +} + +MODULE_DESCRIPTION("Use parallel port to debug drivers"); +MODULE_AUTHOR("Oron Peled "); +MODULE_LICENSE("GPL"); +MODULE_VERSION("$Id:"); + +module_init(parallel_dbg_init); +module_exit(parallel_dbg_cleanup); -- cgit v1.2.3