zaptel-uclinux

/* * Zapata Telephony Interface Driver * * Written by Mark Spencer <markster@linux-support.net> * Based on previous works, designs, and architectures conceived and * written by Jim Dixon <jim@lambdatel.com>. * * Special thanks to Steve Underwood <steve@coppice.org> * for substantial contributions to signal processing functions * in zaptel and the zapata library. * * Yury Bokhoncovich <byg@cf1.ru> * Adaptation for 2.4.20+ kernels (HDLC API was changed) * The work has been performed as a part of our move * from Cisco 3620 to IBM x305 here in F1 Group * * Copyright (C) 2001 Jim Dixon / Zapata Telephony. * Copyright (C) 2001 Linux Support Services, Inc. * * 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. * * $Id: zaptel1.c 2959 2007-03-30 04:02:22Z cooloney $ */ #include "zconfig.h" #include <linux/kernel.h> #include <linux/errno.h> #include <linux/module.h> #include <linux/proc_fs.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/version.h> #include <linux/kmod.h> #ifdef CONFIG_DEVFS_FS #include <linux/devfs_fs_kernel.h> #endif /* CONFIG_DEVFS_FS */ #ifdef CONFIG_ZAPATA_NET #include <linux/netdevice.h> #endif /* CONFIG_ZAPATA_NET */ #include <linux/ppp_defs.h> #ifdef CONFIG_ZAPATA_PPP #include <linux/netdevice.h> #include <linux/if.h> #include <linux/if_ppp.h> #endif #ifndef CONFIG_OLD_HDLC_API #define NEW_HDLC_INTERFACE #endif #define __ECHO_STATE_MUTE (1 << 8) #define ECHO_STATE_IDLE (0) #define ECHO_STATE_PRETRAINING (1 | (__ECHO_STATE_MUTE)) #define ECHO_STATE_STARTTRAINING (2 | (__ECHO_STATE_MUTE)) #define ECHO_STATE_AWAITINGECHO (3 | (__ECHO_STATE_MUTE)) #define ECHO_STATE_TRAINING (4 | (__ECHO_STATE_MUTE)) #define ECHO_STATE_ACTIVE (5) /* #define BUF_MUNGE */ /* Grab fasthdlc with tables */ #define FAST_HDLC_NEED_TABLES #include "fasthdlc.h" #define STANDALONE_ZAPATA #ifdef STANDALONE_ZAPATA #include "zaptel.h" #else #include <linux/zaptel.h> #endif #ifdef LINUX26 #include <linux/moduleparam.h> #endif /* Get helper arithmetic */ #include "arith.h" #if defined(CONFIG_ZAPTEL_MMX) || defined(ECHO_CAN_FP) #include <asm/i387.h> #endif #define hdlc_to_ztchan(h) (((struct zt_hdlc *)(h))->chan) #define dev_to_ztchan(h) (((struct zt_hdlc *)(dev_to_hdlc(h)->priv))->chan) #ifdef LINUX26 #define ztchan_to_dev(h) ((h)->hdlcnetdev->netdev) #else #define ztchan_to_dev(h) (&((h)->hdlcnetdev->netdev.netdev)) #endif /* macro-oni for determining a unit (channel) number */ #define UNIT(file) MINOR(file->f_dentry->d_inode->i_rdev) /* 0 -- not print debug info; 1 -- print debug info */ #define CONFIG_ZAPATA_DEBUG 0 /* names of tx level settings */ static char *zt_txlevelnames[] = { "0 db (CSU)/0-133 feet (DSX-1)", "133-266 feet (DSX-1)", "266-399 feet (DSX-1)", "399-533 feet (DSX-1)", "533-655 feet (DSX-1)", "-7.5db (CSU)", "-15db (CSU)", "-22.5db (CSU)" } ; EXPORT_SYMBOL(zt_init_tone_state); EXPORT_SYMBOL(zt_dtmf_tone); EXPORT_SYMBOL(zt_register); EXPORT_SYMBOL(zt_unregister); EXPORT_SYMBOL(__zt_mulaw); EXPORT_SYMBOL(__zt_alaw); #ifdef CONFIG_CALC_XLAW EXPORT_SYMBOL(__zt_lineartoulaw); EXPORT_SYMBOL(__zt_lineartoalaw); #else EXPORT_SYMBOL(__zt_lin2mu); EXPORT_SYMBOL(__zt_lin2a); #endif EXPORT_SYMBOL(zt_lboname); EXPORT_SYMBOL(zt_transmit); EXPORT_SYMBOL(zt_receive); EXPORT_SYMBOL(zt_rbsbits); EXPORT_SYMBOL(zt_qevent_nolock); EXPORT_SYMBOL(zt_qevent_lock); EXPORT_SYMBOL(zt_hooksig); EXPORT_SYMBOL(zt_alarm_notify); EXPORT_SYMBOL(zt_set_dynamic_ioctl); EXPORT_SYMBOL(zt_ec_chunk); EXPORT_SYMBOL(zt_ec_span); #ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_entries[ZT_MAX_SPANS]; #endif /* Here are a couple important little additions for devfs */ #ifdef CONFIG_DEVFS_FS static devfs_handle_t zaptel_devfs_dir; static devfs_handle_t channel; static devfs_handle_t pseudo; static devfs_handle_t ctl; static devfs_handle_t timer; #endif /* udev necessary data structures. Yeah! */ #ifdef CONFIG_ZAP_UDEV #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13) static struct class *zap_class = NULL; #else static struct class_simple *zap_class = NULL; #define class_create class_simple_create #define class_destroy class_simple_destroy #define class_device_create class_simple_device_add #define class_device_destroy(a, b) class_simple_device_remove(b) #endif #endif /* There is a table like this in the PPP driver, too */ static int deftaps = 64; static __u16 fcstab[256] = { 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 }; static int debug; /* states for transmit signalling */ typedef enum {ZT_TXSTATE_ONHOOK,ZT_TXSTATE_OFFHOOK,ZT_TXSTATE_START, ZT_TXSTATE_PREWINK,ZT_TXSTATE_WINK,ZT_TXSTATE_PREFLASH, ZT_TXSTATE_FLASH,ZT_TXSTATE_DEBOUNCE,ZT_TXSTATE_AFTERSTART, ZT_TXSTATE_RINGON,ZT_TXSTATE_RINGOFF,ZT_TXSTATE_KEWL, ZT_TXSTATE_AFTERKEWL,ZT_TXSTATE_PULSEBREAK,ZT_TXSTATE_PULSEMAKE, ZT_TXSTATE_PULSEAFTER } ZT_TXSTATE_t; typedef short sumtype[ZT_MAX_CHUNKSIZE]; static sumtype sums[(ZT_MAX_CONF + 1) * 3]; #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15) #define CLASS_DEV_CREATE(class, devt, device, name) \ class_device_create(class, NULL, devt, device, name) #else #define CLASS_DEV_CREATE(class, devt, device, name) \ class_device_create(class, devt, device, name) #endif /* Translate conference aliases into actual conferences and vice-versa */ s