ixj.c

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/****************************************************************************
 *    ixj.c
 *
 * Device Driver for Quicknet Technologies, Inc.'s Telephony cards
 * including the Internet PhoneJACK, Internet PhoneJACK Lite,
 * Internet PhoneJACK PCI, Internet LineJACK, Internet PhoneCARD and
 * SmartCABLE
 *
 *    (c) Copyright 1999-2001  Quicknet Technologies, Inc.
 *
 *    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.
 *
 * Author:          Ed Okerson, <[e-mail]>
 *
 * Contributors:    Greg Herlein, <[e-mail]>
 *                  David W. Erhart, <[e-mail]>
 *                  John Sellers, <[e-mail]>
 *                  Mike Preston, <[e-mail]>
 *    
 * Fixes:           David Huggins-Daines, <[e-mail]>
 *                  Fabio Ferrari, <[e-mail]>
 *                  Artis Kugevics, <[e-mail]>
 *
 * More information about the hardware related to this driver can be found  
 * at our website:    http://www.quicknet.net
 *
 * IN NO EVENT SHALL QUICKNET TECHNOLOGIES, INC. BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF QUICKNET
 * TECHNOLOGIES, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *    
 * QUICKNET TECHNOLOGIES, INC. SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND QUICKNET TECHNOLOGIES, INC. HAS NO OBLIGATION
 * TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 ***************************************************************************/

static char ixj_c_rcsid[] = "$Id: ixj.c,v 4.7 2001/08/13 06:19:33 craigs Exp $";
static char ixj_c_revision[] = "$Revision: 4.7 $";

/*
 * $Log: ixj.c,v $
 * Revision 4.7  2001/08/13 06:19:33  craigs
 * Added additional changes from Alan Cox and John Anderson for
 * 2.2 to 2.4 cleanup and bounds checking
 *
 * Revision 4.6  2001/08/13 01:05:05  craigs
 * Really fixed PHONE_QUERY_CODEC problem this time
 *
 * Revision 4.5  2001/08/13 00:11:03  craigs
 * Fixed problem in handling of PHONE_QUERY_CODEC, thanks to Shane Anderson
 *
 * Revision 4.4  2001/08/07 07:58:12  craigs
 * Changed back to three digit version numbers
 * Added tagbuild target to allow automatic and easy tagging of versions
 *
 * Revision 4.3  2001/08/07 07:24:47  craigs
 * Added ixj-ver.h to allow easy configuration management of driver
 * Added display of version number in /prox/ixj
 *
 * Revision 4.2  2001/08/06 07:07:19  craigs
 * Reverted IXJCTL_DSP_TYPE and IXJCTL_DSP_VERSION files to original
 * behaviour of returning int rather than short *
 *
 * Revision 4.1  2001/08/05 00:17:37  craigs
 * More changes for correct PCMCIA installation
 * Start of changes for backward Linux compatibility
 *
 * Revision 4.0  2001/08/04 12:33:12  craigs
 * New version using GNU autoconf
 *
 * Revision 3.105  2001/07/20 23:14:32  eokerson
 * More work on CallerID generation when using ring cadences.
 *
 * Revision 3.104  2001/07/06 01:33:55  eokerson
 * Some bugfixes from Robert Vojta <[e-mail]> and a few mods to the Makefile.
 *
 * Revision 3.103  2001/07/05 19:20:16  eokerson
 * Updated HOWTO
 * Changed mic gain to 30dB on Internet LineJACK mic/speaker port.
 *
 * Revision 3.102  2001/07/03 23:51:21  eokerson
 * Un-mute mic on Internet LineJACK when in speakerphone mode.
 *
 * Revision 3.101  2001/07/02 19:26:56  eokerson
 * Removed initialiazation of ixjdebug and ixj_convert_loaded so they will go in the .bss instead of the .data
 *
 * Revision 3.100  2001/07/02 19:18:27  eokerson
 * Changed driver to make dynamic allocation possible.  We now pass IXJ * between functions instead of array indexes.
 * Fixed the way the POTS and PSTN ports interact during a PSTN call to allow local answering.
 * Fixed speaker mode on Internet LineJACK.
 *
 * Revision 3.99  2001/05/09 14:11:16  eokerson
 * Fixed kmalloc error in ixj_build_filter_cadence.  Thanks David Chan <[e-mail]>.
 *
 * Revision 3.98  2001/05/08 19:55:33  eokerson
 * Fixed POTS hookstate detection while it is connected to PSTN port.
 *
 * Revision 3.97  2001/05/08 00:01:04  eokerson
 * Fixed kernel oops when sending caller ID data.
 *
 * Revision 3.96  2001/05/04 23:09:30  eokerson
 * Now uses one kernel timer for each card, instead of one for the entire driver.
 *
 * Revision 3.95  2001/04/25 22:06:47  eokerson
 * Fixed squawking at beginning of some G.723.1 calls.
 *
 * Revision 3.94  2001/04/03 23:42:00  eokerson
 * Added linear volume ioctls
 * Added raw filter load ioctl
 *
 * Revision 3.93  2001/02/27 01:00:06  eokerson
 * Fixed blocking in CallerID.
 * Reduced size of ixj structure for smaller driver footprint.
 *
 * Revision 3.92  2001/02/20 22:02:59  eokerson
 * Fixed isapnp and pcmcia module compatibility for 2.4.x kernels.
 * Improved PSTN ring detection.
 * Fixed wink generation on POTS ports.
 *
 * Revision 3.91  2001/02/13 00:55:44  eokerson
 * Turn AEC back on after changing frame sizes.
 *
 * Revision 3.90  2001/02/12 16:42:00  eokerson
 * Added ALAW codec, thanks to Fabio Ferrari for the table based converters to make ALAW from ULAW.
 *
 * Revision 3.89  2001/02/12 15:41:16  eokerson
 * Fix from Artis Kugevics - Tone gains were not being set correctly.
 *
 * Revision 3.88  2001/02/05 23:25:42  eokerson
 * Fixed lockup bugs with deregister.
 *
 * Revision 3.87  2001/01/29 21:00:39  eokerson
 * Fix from Fabio Ferrari <[e-mail]> to properly handle EAGAIN and EINTR during non-blocking write.
 * Updated copyright date.
 *
 * Revision 3.86  2001/01/23 23:53:46  eokerson
 * Fixes to G.729 compatibility.
 *
 * Revision 3.85  2001/01/23 21:30:36  eokerson
 * Added verbage about cards supported.
 * Removed commands that put the card in low power mode at some times that it should not be in low power mode.
 *
 * Revision 3.84  2001/01/22 23:32:10  eokerson
 * Some bugfixes from David Huggins-Daines, <[e-mail]> and other cleanups.
 *
 * Revision 3.83  2001/01/19 14:51:41  eokerson
 * Fixed ixj_WriteDSPCommand to decrement usage counter when command fails.
 *
 * Revision 3.82  2001/01/19 00:34:49  eokerson
 * Added verbosity to write overlap errors.
 *
 * Revision 3.81  2001/01/18 23:56:54  eokerson
 * Fixed PSTN line test functions.
 *
 * Revision 3.80  2001/01/18 22:29:27  eokerson
 * Updated AEC/AGC values for different cards.
 *
 * Revision 3.79  2001/01/17 02:58:54  eokerson
 * Fixed AEC reset after Caller ID.
 * Fixed Codec lockup after Caller ID on Call Waiting when not using 30ms frames.
 *
 * Revision 3.78  2001/01/16 19:43:09  eokerson
 * Added support for Linux 2.4.x kernels.
 *
 * Revision 3.77  2001/01/09 04:00:52  eokerson
 * Linetest will now test the line, even if it has previously succeded.
 *
 * Revision 3.76  2001/01/08 19:27:00  eokerson
 * Fixed problem with standard cable on Internet PhoneCARD.
 *
 * Revision 3.75  2000/12/22 16:52:14  eokerson
 * Modified to allow hookstate detection on the POTS port when the PSTN port is selected.
 *
 * Revision 3.74  2000/12/08 22:41:50  eokerson
 * Added capability for G729B.
 *
 * Revision 3.73  2000/12/07 23:35:16  eokerson
 * Added capability to have different ring pattern before CallerID data.
 * Added hookstate checks in CallerID routines to stop FSK.
 *
 * Revision 3.72  2000/12/06 19:31:31  eokerson
 * Modified signal behavior to only send one signal per event.
 *
 * Revision 3.71  2000/12/06 03:23:08  eokerson
 * Fixed CallerID on Call Waiting.
 *
 * Revision 3.70  2000/12/04 21:29:37  eokerson
 * Added checking to Smart Cable gain functions.
 *
 * Revision 3.69  2000/12/04 21:05:20  eokerson
 * Changed ixjdebug levels.
 * Added ioctls to change gains in Internet Phone CARD Smart Cable.
 *
 * Revision 3.68  2000/12/04 00:17:21  craigs
 * Changed mixer voice gain to +6dB rather than 0dB
 *
 * Revision 3.67  2000/11/30 21:25:51  eokerson
 * Fixed write signal errors.
 *
 * Revision 3.66  2000/11/29 22:42:44  eokerson
 * Fixed PSTN ring detect problems.
 *
 * Revision 3.65  2000/11/29 07:31:55  craigs
 * Added new 425Hz filter co-efficients
 * Added card-specific DTMF prescaler initialisation
 *
 * Revision 3.64  2000/11/28 14:03:32  craigs
 * Changed certain mixer initialisations to be 0dB rather than 12dB
 * Added additional information to /proc/ixj
 *
 * Revision 3.63  2000/11/28 11:38:41  craigs
 * Added display of AEC modes in AUTO and AGC mode
 *
 * Revision 3.62  2000/11/28 04:05:44  eokerson
 * Improved PSTN ring detection routine.
 *
 * Revision 3.61  2000/11/27 21:53:12  eokerson
 * Fixed flash detection.
 *
 * Revision 3.60  2000/11/27 15:57:29  eokerson
 * More work on G.729 load routines.
 *
 * Revision 3.59  2000/11/25 21:55:12  eokerson
 * Fixed errors in G.729 load routine.
 *
 * Revision 3.58  2000/11/25 04:08:29  eokerson
 * Added board locks around G.729 and TS85 load routines.
 *
 * Revision 3.57  2000/11/24 05:35:17  craigs
 * Added ability to retrieve mixer values on LineJACK
 * Added complete initialisation of all mixer values at startup
 * Fixed spelling mistake
 *
 * Revision 3.56  2000/11/23 02:52:11  robertj
 * Added cvs change log keyword.
 * Fixed bug in capabilities list when using G.729 module.
 *
 */

#include "ixj-ver.h"

#define PERFMON_STATS
#define IXJDEBUG 0
#define MAXRINGS 5

#include <linux/module.h>

#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel.h>	/* printk() */
#include <linux/fs.h>		/* everything... */
#include <linux/errno.h>	/* error codes */
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/tqueue.h>
#include <linux/proc_fs.h>
#include <linux/poll.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/pci.h>

#include <asm/io.h>
#include <asm/segment.h>
#include <asm/uaccess.h>

#include <linux/isapnp.h>

#include "ixj.h"

#define TYPE(dev) (MINOR(dev) >> 4)
#define NUM(dev) (MINOR(dev) & 0xf)

static int ixjdebug;
static int hertz = HZ;
static int samplerate = 100;

MODULE_PARM(ixjdebug, "i");

/************************************************************************
*
* ixjdebug meanings are now bit mapped instead of level based
* Values can be or'ed together to turn on multiple messages
*
* bit  0 (0x0001) = any failure
* bit  1 (0x0002) = general messages
* bit  2 (0x0004) = POTS ringing related
* bit  3 (0x0008) = PSTN events
* bit  4 (0x0010) = PSTN Cadence state details
* bit  5 (0x0020) = Tone detection triggers
* bit  6 (0x0040) = Tone detection cadence details
* bit  7 (0x0080) = ioctl tracking
* bit  8 (0x0100) = signal tracking
* bit  9 (0x0200) = CallerID generation details
*
************************************************************************/

#ifdef IXJ_DYN_ALLOC

static IXJ *ixj[IXJMAX];
#define	get_ixj(b)	ixj[(b)]

/*
 *	Allocate a free IXJ device
 */
 
static IXJ *ixj_alloc()
{
	for(cnt=0; cnt<IXJMAX; cnt++)
	{
		if(ixj[cnt] == NULL || !ixj[cnt]->DSPbase)
		{
			j = kmalloc(sizeof(IXJ), GFP_KERNEL);
			if (j == NULL)
				return NULL;
			ixj[cnt] = j;
			return j;
		}
	}
	return NULL;
}

static void ixj_fsk_free(IXJ *j)
{
	if(j->fskdata != NULL) {
		kfree(j->fskdata);
		j->fskdata = NULL;
	}
}

static void ixj_fsk_alloc(IXJ *j)
{
	if(!j->fskdata) {
		j->fskdata = kmalloc(8000, GFP_KERNEL);
		if (!j->fskdata) {
			if(ixjdebug & 0x0200) {
				printk("IXJ phone%d - allocate failed\n", j->board);
			}
			return;
		} else {
			j->fsksize = 8000;
			if(ixjdebug & 0x0200) {
				printk("IXJ phone%d - allocate succeded\n", j->board);
			}
		}
	}
}

#else

static IXJ ixj[IXJMAX];
#define	get_ixj(b)	(&ixj[(b)])

/*
 *	Allocate a free IXJ device
 */
 
static IXJ *ixj_alloc(void)
{
	int cnt;
	for(cnt=0; cnt<IXJMAX; cnt++)
	{
		if(!ixj[cnt].DSPbase)
		{
			return &ixj[cnt];
		}
	}
	return NULL;
}

static inline void ixj_fsk_free(IXJ *j) {;}

static inline void ixj_fsk_alloc(IXJ *j)
{
	j->fsksize = 8000;
}

#endif

#ifdef PERFMON_STATS
#define ixj_perfmon(x)	((x)++)
#else
#define ixj_perfmon(x)	do {} while(0);
#endif

static int ixj_convert_loaded;

static int ixj_WriteDSPCommand(unsigned short, IXJ *j);

/************************************************************************
*
* These are function definitions to allow external modules to register
* enhanced functionality call backs.
*
************************************************************************/

static int Stub(IXJ * J, unsigned long arg)
{
	return 0;
}

static IXJ_REGFUNC ixj_DownloadG729 = &Stub;
static IXJ_REGFUNC ixj_DownloadTS85 = &Stub;
static IXJ_REGFUNC ixj_PreRead = &Stub;
static IXJ_REGFUNC ixj_PostRead = &Stub;
static IXJ_REGFUNC ixj_PreWrite = &Stub;
static IXJ_REGFUNC ixj_PostWrite = &Stub;
static IXJ_REGFUNC ixj_PreIoctl = &Stub;
static IXJ_REGFUNC ixj_PostIoctl = &Stub;

static void ixj_read_frame(IXJ *j);
static void ixj_write_frame(IXJ *j);
static void ixj_init_timer(IXJ *j);
static void ixj_add_timer(IXJ *	j);
static void ixj_timeout(unsigned long ptr);
static int read_filters(IXJ *j);
static int LineMonitor(IXJ *j);
static int ixj_fasync(int fd, struct file *, int mode);
static int ixj_set_port(IXJ *j, int arg);
static int ixj_set_pots(IXJ *j, int arg);
static int ixj_hookstate(IXJ *j);
static int ixj_record_start(IXJ *j);
static void ixj_record_stop(IXJ *j);
static void set_rec_volume(IXJ *j, int volume);
static int get_rec_volume(IXJ *j);
static int set_rec_codec(IXJ *j, int rate);
static void ixj_vad(IXJ *j, int arg);
static int ixj_play_start(IXJ *j);
static void ixj_play_stop(IXJ *j);