obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_OPVXA1200)		+= opvxa1200.o

obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_WCOPENPCI)		+= wcopenpci.o

obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_ZAPHFC)		+= zaphfc/

obj-$(DAHDI_BUILD_ALL)$(CONFIG_ECHO)			+= ../staging/echo/

obj-$(DAHDI_BUILD_ALL)$(CONFIG_DAHDI_ECHOCAN_OSLEC)	+= dahdi_echocan_oslec.o

config DAHDI_OPVXA1200

	tristate "OpenVox A1200P FXS/FXO Interface"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides support for the OpenVox A1200P FXS/FXO Interface.

	  To compile this driver as a module, choose M here: the

	  module will be called opvxa1200.

	  If unsure, say Y.

config DAHDI_WCOPENPCI

	tristate "Voicetronix OpenPCI Interface DAHDI driver"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides support for the Voicetronix OpenPCI Interface.

	  To compile this driver as a module, choose M here: the

	  module will be called wcopenpci.

	  If unsure, say Y.

config DAHDI_ZAPHFC

	tristate "HFC-S DAHDI Driver"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides DAHDI support for various HFC-S single-port 

          ISDN (BRI) cards.

	  To compile this driver as a module, choose M here: the

	  module will be called zaphfc.

	  If unsure, say Y.

config ECHO

	tristate "Line Echo Canceller support"

	default DAHDI

	--help--

	  This driver provides line echo cancelling support for mISDN and

	  DAHDI drivers.

	  To compile this driver as a module, choose M here: the

	  module will be called echo.

	  If unsure, say Y.

config DAHDI_OPVXA1200

	tristate "OpenVox A1200P FXS/FXO Interface"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides support for the OpenVox A1200P FXS/FXO Interface.

	  To compile this driver as a module, choose M here: the

	  module will be called opvxa1200.

	  If unsure, say Y.

config DAHDI_WCOPENPCI

	tristate "Voicetronix OpenPCI Interface DAHDI driver"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides support for the Voicetronix OpenPCI Interface.

	  To compile this driver as a module, choose M here: the

	  module will be called wcopenpci.

	  If unsure, say Y.

config DAHDI_ZAPHFC

	tristate "HFC-S DAHDI Driver"

	depends on DAHDI && PCI

	default DAHDI

	---help---

	  This driver provides DAHDI support for various HFC-S single-port 

          ISDN (BRI) cards.

	  To compile this driver as a module, choose M here: the

	  module will be called zaphfc.

	  If unsure, say Y.

config ECHO

	tristate "Line Echo Canceller support"

	default DAHDI

	--help--

	  This driver provides line echo cancelling support for mISDN and

	  DAHDI drivers.

	  To compile this driver as a module, choose M here: the

	  module will be called echo.

	  If unsure, say Y.

/*

 * OpenVox A1200P FXS/FXO Interface Driver for DAHDI Telephony interface

 *

 * Modify from wctdm.c by MiaoLin<miaolin@openvox.com.cn>

 *

 * 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. 

 *

 */

/* Rev histroy

 *

 * Rev 0.10 initial version	

 * Rev 0.11 

 * 	fixed the led light on/off bug.

 * 	modify some wctdm print to opvxa1200

 * 	support firmware version 1.2, faster i/o operation, and better LED control.

 * 

 * Rev 0.12 patched to support new pci id 0x8519

 * Rev 0.13 patched to remove the warning during compile under kernel 2.6.22 

 * Rev 0.14 patched to remove the bug for ZAP_IRQ_SHARED , 3/9/2007 

 * Rev 0.15 patched to support new pci ID 0X9532 by james.zhu, 23/10/2007

 * Rev 0.16 support new pci id 0x9559 by Miao Lin 21/3/2008

 * Rev 0.17 

 *	patched a few bugs, 

 *	add hwgain support.

 *	fixed A800P version check

 * Rev 1.4.9.2 

 *		Only generate 8 channels for A800P

 * 		Version number synced to zaptel distribution.

 * Rev 1.4.9.2.a

 *		Fixed freeregion.

 * 		

 * Rev 1.4.9.2.b

 *    Add cid before first ring support.

 *    New Paremeters:

 *          	cidbeforering : set to 1 will cause the card enable cidbeforering function. default 0

 * 		cidbuflen : length of cid buffer, in msec, default 3000 msec.

 *              cidtimeout : time out of a ring, default 6000msec

 *   	User must set cidstart=polarity in zapata.conf to use with this feature

 * 		cidsignalling = signalling format send before 1st ring. most likely dtmf.

 * 

 * Rev 1.4.9.2.c

 * 	add driver parameter cidtimeout.

 * 

 * Rev 1.4.9.2.d 

 *  	add debug stuff to test fxs power alarm

 *  

 * Rev 1.4.11

 *  	Support enhanced full scale tx/rx for FXO required by europe standard (Register 30, acim) (module parm fxofullscale)

 *  

 * Rev 1.4.12 2008/10/17

 *      Fixed bug cause FXS module report fake power alarm.

 *      Power alarm debug stuff removed.

 * 

 * Rev 2.0 DAHDI 2008/10/17

 *

 * Rev 2.0.1 add new pci id 0x9599

 * Re 2.0.2 12/01/2009  

       add fixedtimepolarity: set time(ms) when send polarity after 1st ring happen. 

 *				Sometimes the dtmf cid is sent just after first ring off, and the system do not have 

 *				enough time to start detect 1st dtmf.

 *				0 means send polarity at the end of 1st ring.

 *				x means send ploarity after x ms of 1st ring begin.

 * 

 * Rev 2.0.3 12/01/2009 

 *        Add touch_softlockup_watchdog() in wctdm_hardware_init, to avoid cpu softlockup system message for FXS.

 *

 *

 * Rev 1.4.12.4  17/04/2009 James.zhu

 *       Changed wctdm_voicedaa_check_hook() to detect FXO battery and solved the problem with dial(dahdi/go/XXXXXXXXXX)

 *       add alarm detection for FXO

 *

 * Rev 1.4.12.5 01/10/2009 james.zhu

 *       Add jiffies for 5 second in wctdm_hardware_init

 *

 *

 */ 

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/errno.h>

#include <linux/pci.h>

#include <linux/interrupt.h>

#include <linux/moduleparam.h>

#include <asm/io.h>

#include "proslic.h"

/* MiaoLin debug start */

#include <linux/string.h>

#include <asm/uaccess.h> 	/* get_fs(), set_fs(), KERNEL_DS */

#include <linux/file.h> 	/* fput() */

/* MiaoLin debug end */

/*

 *  Define for audio vs. register based ring detection

 *  

 */

/* #define AUDIO_RINGCHECK  */

/*

  Experimental max loop current limit for the proslic

  Loop current limit is from 20 mA to 41 mA in steps of 3

  (according to datasheet)

  So set the value below to:

  0x00 : 20mA (default)

  0x01 : 23mA

  0x02 : 26mA

  0x03 : 29mA

  0x04 : 32mA

  0x05 : 35mA

  0x06 : 37mA

  0x07 : 41mA

*/

static int loopcurrent = 20;

static int reversepolarity = 0;

static alpha  indirect_regs[] =

{

{0,255,"DTMF_ROW_0_PEAK",0x55C2},

{1,255,"DTMF_ROW_1_PEAK",0x51E6},

{2,255,"DTMF_ROW2_PEAK",0x4B85},

{3,255,"DTMF_ROW3_PEAK",0x4937},

{4,255,"DTMF_COL1_PEAK",0x3333},

{5,255,"DTMF_FWD_TWIST",0x0202},

{6,255,"DTMF_RVS_TWIST",0x0202},

{7,255,"DTMF_ROW_RATIO_TRES",0x0198},

{8,255,"DTMF_COL_RATIO_TRES",0x0198},

{9,255,"DTMF_ROW_2ND_ARM",0x0611},

{10,255,"DTMF_COL_2ND_ARM",0x0202},

{11,255,"DTMF_PWR_MIN_TRES",0x00E5},

{12,255,"DTMF_OT_LIM_TRES",0x0A1C},

{13,0,"OSC1_COEF",0x7B30},

{14,1,"OSC1X",0x0063},

{15,2,"OSC1Y",0x0000},

{16,3,"OSC2_COEF",0x7870},

{17,4,"OSC2X",0x007D},

{18,5,"OSC2Y",0x0000},

{19,6,"RING_V_OFF",0x0000},

{20,7,"RING_OSC",0x7EF0},

{21,8,"RING_X",0x0160},

{22,9,"RING_Y",0x0000},

{23,255,"PULSE_ENVEL",0x2000},

{24,255,"PULSE_X",0x2000},

{25,255,"PULSE_Y",0x0000},

//{26,13,"RECV_DIGITAL_GAIN",0x4000},	// playback volume set lower

{26,13,"RECV_DIGITAL_GAIN",0x2000},	// playback volume set lower

{27,14,"XMIT_DIGITAL_GAIN",0x4000},

//{27,14,"XMIT_DIGITAL_GAIN",0x2000},

{28,15,"LOOP_CLOSE_TRES",0x1000},

{29,16,"RING_TRIP_TRES",0x3600},

{30,17,"COMMON_MIN_TRES",0x1000},

{31,18,"COMMON_MAX_TRES",0x0200},

{32,19,"PWR_ALARM_Q1Q2",0x07C0},

{33,20,"PWR_ALARM_Q3Q4",0x2600},

{34,21,"PWR_ALARM_Q5Q6",0x1B80},

{35,22,"LOOP_CLOSURE_FILTER",0x8000},

{36,23,"RING_TRIP_FILTER",0x0320},

{37,24,"TERM_LP_POLE_Q1Q2",0x008C},

{38,25,"TERM_LP_POLE_Q3Q4",0x0100},

{39,26,"TERM_LP_POLE_Q5Q6",0x0010},

{40,27,"CM_BIAS_RINGING",0x0C00},

{41,64,"DCDC_MIN_V",0x0C00},

{42,255,"DCDC_XTRA",0x1000},

{43,66,"LOOP_CLOSE_TRES_LOW",0x1000},

};

#include <dahdi/kernel.h>

#include <dahdi/wctdm_user.h>

#include "fxo_modes.h"

#define NUM_FXO_REGS 60

#define WC_MAX_IFACES 128

#define WC_OFFSET	4	/* Offset between transmit and receive, in bytes. */

#define WC_SYNCFLAG	0xca1ef1ac

#define WC_CNTL    	0x00

#define WC_OPER		0x01

#define WC_AUXC    	0x02

#define WC_AUXD    	0x03

#define WC_MASK0   	0x04

#define WC_MASK1   	0x05

#define WC_INTSTAT 	0x06

#define WC_AUXR		0x07

#define WC_DMAWS	0x08

#define WC_DMAWI	0x0c

#define WC_DMAWE	0x10

#define WC_DMARS	0x18

#define WC_DMARI	0x1c

#define WC_DMARE	0x20

#define WC_AUXFUNC	0x2b

#define WC_SERCTL	0x2d

#define WC_FSCDELAY	0x2f

#define WC_REGBASE	0xc0

#define WC_VER		0x0

#define WC_CS		0x1

#define WC_SPICTRL	0x2

#define WC_SPIDATA	0x3

#define BIT_SPI_BYHW 	(1 << 0)

#define BIT_SPI_BUSY    (1 << 1)	// 0=can read/write spi, 1=spi working.

#define BIT_SPI_START	(1 << 2)

#define BIT_LED_CLK     (1 << 0)	// MiaoLin add to control the led. 

#define BIT_LED_DATA    (1 << 1)	// MiaoLin add to control the led.

#define BIT_CS		(1 << 2)

#define BIT_SCLK	(1 << 3)

#define BIT_SDI		(1 << 4)

#define BIT_SDO		(1 << 5)

#define FLAG_EMPTY	0

#define FLAG_WRITE	1

#define FLAG_READ	2

#define DEFAULT_RING_DEBOUNCE		64		/* Ringer Debounce (64 ms) */

#define POLARITY_DEBOUNCE 	64  	/* Polarity debounce (64 ms) */

#define OHT_TIMER		6000	/* How long after RING to retain OHT */

#define FLAG_3215	(1 << 0)

#define FLAG_A800	(1 << 7)

#define MAX_NUM_CARDS 12

#define NUM_CARDS 12

#define NUM_FLAG  4	/* number of flag channels. */

enum cid_hook_state {

	CID_STATE_IDLE = 0,

	CID_STATE_RING_ON,

	CID_STATE_RING_OFF,

	CID_STATE_WAIT_RING_FINISH

};

/* if you want to record the last 8 sec voice before the driver unload, uncomment it and rebuild. */

/* #define TEST_LOG_INCOME_VOICE */

#define voc_buffer_size (8000*8)

#define MAX_ALARMS 10

#define MOD_TYPE_FXS	0

#define MOD_TYPE_FXO	1

#define MINPEGTIME	10 * 8		/* 30 ms peak to peak gets us no more than 100 Hz */

#define PEGTIME		50 * 8		/* 50ms peak to peak gets us rings of 10 Hz or more */

#define PEGCOUNT	5		/* 5 cycles of pegging means RING */

#define NUM_CAL_REGS 12

struct calregs {

	unsigned char vals[NUM_CAL_REGS];

};

enum proslic_power_warn {

	PROSLIC_POWER_UNKNOWN = 0,

	PROSLIC_POWER_ON,

	PROSLIC_POWER_WARNED,

};

enum battery_state {

	BATTERY_UNKNOWN = 0,

	BATTERY_PRESENT,

	BATTERY_LOST,

};

struct wctdm {

	struct pci_dev *dev;

	char *variety;

	struct dahdi_span span;

	unsigned char ios;

	int usecount;

	unsigned int intcount;

	int dead;

	int pos;

	int flags[MAX_NUM_CARDS];

	int freeregion;

	int alt;

	int curcard;

	int cardflag;		/* Bit-map of present cards */

	enum proslic_power_warn proslic_power;

	spinlock_t lock;

	union {

		struct fxo {

#ifdef AUDIO_RINGCHECK

			unsigned int pegtimer;

			int pegcount;

			int peg;

			int ring;

#else			

			int wasringing;

			int lastrdtx;

#endif			

			int ringdebounce;

			int offhook;

		    unsigned int battdebounce;

			unsigned int battalarm;

			enum battery_state battery;

		        int lastpol;

		        int polarity;

		        int polaritydebounce;

		} fxo;

		struct fxs {

			int oldrxhook;

			int debouncehook;

			int lastrxhook;

			int debounce;

			int ohttimer;

			int idletxhookstate;		/* IDLE changing hook state */

			int lasttxhook;

			int palarms;

			struct calregs calregs;

		} fxs;

	} mod[MAX_NUM_CARDS];

	/* Receive hook state and debouncing */

	int modtype[MAX_NUM_CARDS];

	unsigned char reg0shadow[MAX_NUM_CARDS];

	unsigned char reg1shadow[MAX_NUM_CARDS];

	unsigned long ioaddr;

	unsigned long mem_region;	/* 32 bit Region allocated to tiger320 */

	unsigned long mem_len;		/* Length of 32 bit region */

	volatile unsigned long mem32;	/* Virtual representation of 32 bit memory area */

	dma_addr_t 	readdma;

	dma_addr_t	writedma;

	volatile unsigned char *writechunk;					/* Double-word aligned write memory */

	volatile unsigned char *readchunk;					/* Double-word aligned read memory */

	/*struct dahdi_chan chans[MAX_NUM_CARDS];*/

	struct dahdi_chan _chans[NUM_CARDS];

	struct dahdi_chan *chans[NUM_CARDS];

#ifdef TEST_LOG_INCOME_VOICE	

	char * voc_buf[MAX_NUM_CARDS + NUM_FLAG];

	int voc_ptr[MAX_NUM_CARDS + NUM_FLAG];

#endif

	int lastchan;

	unsigned short ledstate;

	unsigned char fwversion;

	int max_cards;

	char *card_name;

	char *cid_history_buf[MAX_NUM_CARDS];

	int	 cid_history_ptr[MAX_NUM_CARDS];

	int  cid_history_clone_cnt[MAX_NUM_CARDS];

	enum cid_hook_state cid_state[MAX_NUM_CARDS];

   int 	cid_ring_on_time[MAX_NUM_CARDS];

};

static char* A1200P_Name = "A1200P";

static char* A800P_Name  = "A800P";

struct wctdm_desc {

	char *name;

	int flags;

};

static struct wctdm_desc wctdme = { "OpenVox A1200P/A800P", 0 };

static int acim2tiss[16] = { 0x0, 0x1, 0x4, 0x5, 0x7, 0x0, 0x0, 0x6, 0x0, 0x0, 0x0, 0x2, 0x0, 0x3 };

static struct wctdm *ifaces[WC_MAX_IFACES];

static void wctdm_release(struct wctdm *wc);

static unsigned int battdebounce;

static unsigned int battalarm;

static unsigned int battthresh;

static int ringdebounce = DEFAULT_RING_DEBOUNCE;

static int fwringdetect = 0;

static int debug = 0;

static int robust = 0;

static int timingonly = 0;

static int lowpower = 0;

static int boostringer = 0;

static int fastringer = 0;

static int _opermode = 0;

static char *opermode = "FCC";

static int fxshonormode = 0;

static int alawoverride = 0;

static int fastpickup = 0;

static int fxotxgain = 0;

static int fxorxgain = 0;

static int fxstxgain = 0;

static int fxsrxgain = 0;

/* special h/w control command */

static int spibyhw = 1;

static int usememio = 1;

static int cidbeforering = 0;

static int cidbuflen = 3000;	/* in msec, default 3000 */

static int cidtimeout = 6*1000;	/* in msec, default 6000 */

static int fxofullscale = 0;	/* fxo full scale tx/rx, register 30, acim */

static int fixedtimepolarity=0;	/* time delay in ms when send polarity after rise edge of 1st ring.*/

static int wctdm_init_proslic(struct wctdm *wc, int card, int fast , int manual, int sane);

static void wctdm_set_led(struct wctdm* wc, int card, int onoff)

{

	int i;

	unsigned char c;

	wc->ledstate &= ~(0x01<<card);

	wc->ledstate |= (onoff<<card);

	c = (inb(wc->ioaddr + WC_AUXD)&~BIT_LED_CLK)|BIT_LED_DATA;

	outb( c,  wc->ioaddr + WC_AUXD);

	for(i=MAX_NUM_CARDS-1; i>=0; i--)

	{

		if(wc->ledstate & (0x0001<<i))

			if(wc->fwversion == 0x11)

				c &= ~BIT_LED_DATA;

			else

				c |= BIT_LED_DATA;

		else

			if(wc->fwversion == 0x11)

				c |= BIT_LED_DATA;

			else

				c &= ~BIT_LED_DATA;

		outb( c,  wc->ioaddr + WC_AUXD);

		outb( c|BIT_LED_CLK,  wc->ioaddr + WC_AUXD);

		outb( (c&~BIT_LED_CLK)|BIT_LED_DATA,  wc->ioaddr + WC_AUXD);

	}	

}

static inline void wctdm_transmitprep(struct wctdm *wc, unsigned char ints)

{

	int x, y, chan_offset, pos;

	volatile unsigned char *txbuf;

	if (ints & /*0x01*/ 0x04) 

		/* Write is at interrupt address.  Start writing from normal offset */

		txbuf = wc->writechunk;

	else 

		txbuf = wc->writechunk + DAHDI_CHUNKSIZE * (MAX_NUM_CARDS+NUM_FLAG);

	/* Calculate Transmission */

	dahdi_transmit(&wc->span);

	if(wc->lastchan == -1)	// not in sync.

		return;

	chan_offset = (wc->lastchan*4 + 4 ) % (MAX_NUM_CARDS+NUM_FLAG);

	for (y=0;y<DAHDI_CHUNKSIZE;y++) {

#ifdef __BIG_ENDIAN

	// operation pending...

#else

		for (x=0;x<(MAX_NUM_CARDS+NUM_FLAG);x++) {

			pos = y * (MAX_NUM_CARDS+NUM_FLAG) + ((x + chan_offset + MAX_NUM_CARDS+NUM_FLAG - WC_OFFSET)&0x0f);

			if(x<wc->max_cards/*MAX_NUM_CARDS*/)

				txbuf[pos] = wc->chans[x]->writechunk[y]; 

			else

				txbuf[pos] = 0; 

		}

#endif

	}

}

#ifdef AUDIO_RINGCHECK

static inline void ring_check(struct wctdm *wc, int card)

{

	int x;

	short sample;

	if (wc->modtype[card] != MOD_TYPE_FXO)

		return;

	wc->mod[card].fxo.pegtimer += DAHDI_CHUNKSIZE;

	for (x=0;x<DAHDI_CHUNKSIZE;x++) {

		/* Look for pegging to indicate ringing */

		sample = DAHDI_XLAW(wc->chans[card].readchunk[x], (&(wc->chans[card])));

		if ((sample > 10000) && (wc->mod[card].fxo.peg != 1)) {

			if (debug > 1) printk(KERN_DEBUG "High peg!\n");

			if ((wc->mod[card].fxo.pegtimer < PEGTIME) && (wc->mod[card].fxo.pegtimer > MINPEGTIME))

				wc->mod[card].fxo.pegcount++;

			wc->mod[card].fxo.pegtimer = 0;

			wc->mod[card].fxo.peg = 1;

		} else if ((sample < -10000) && (wc->mod[card].fxo.peg != -1)) {

			if (debug > 1) printk(KERN_DEBUG "Low peg!\n");

			if ((wc->mod[card].fxo.pegtimer < (PEGTIME >> 2)) && (wc->mod[card].fxo.pegtimer > (MINPEGTIME >> 2)))

				wc->mod[card].fxo.pegcount++;

			wc->mod[card].fxo.pegtimer = 0;

			wc->mod[card].fxo.peg = -1;

		}

	}

	if (wc->mod[card].fxo.pegtimer > PEGTIME) {

		/* Reset pegcount if our timer expires */

		wc->mod[card].fxo.pegcount = 0;

	}

	/* Decrement debouncer if appropriate */

	if (wc->mod[card].fxo.ringdebounce)

		wc->mod[card].fxo.ringdebounce--;

	if (!wc->mod[card].fxo.offhook && !wc->mod[card].fxo.ringdebounce) {

		if (!wc->mod[card].fxo.ring && (wc->mod[card].fxo.pegcount > PEGCOUNT)) {

			/* It's ringing */

			if (debug)

				printk(KERN_DEBUG "RING on %d/%d!\n", wc->span.spanno, card + 1);

			if (!wc->mod[card].fxo.offhook)

				dahdi_hooksig(&wc->chans[card], DAHDI_RXSIG_RING);

			wc->mod[card].fxo.ring = 1;

		}

		if (wc->mod[card].fxo.ring && !wc->mod[card].fxo.pegcount) {

			/* No more ring */

			if (debug)

				printk(KERN_DEBUG "NO RING on %d/%d!\n", wc->span.spanno, card + 1);

			dahdi_hooksig(&wc->chans[card], DAHDI_RXSIG_OFFHOOK);

			wc->mod[card].fxo.ring = 0;

		}

	}

}

#endif

static inline void wctdm_receiveprep(struct wctdm *wc, unsigned char ints)

{

	volatile unsigned char *rxbuf;

	int x, y, chan_offset;

	if (ints & 0x08/*0x04*/)

		/* Read is at interrupt address.  Valid data is available at normal offset */

		rxbuf = wc->readchunk;

	else

		rxbuf = wc->readchunk + DAHDI_CHUNKSIZE * (MAX_NUM_CARDS+NUM_FLAG);

	for(x=0; x<4; x++)

		if(  *(int*)(rxbuf+x*4) == WC_SYNCFLAG)

			break;

	if(x==4)

	{

		printk("buffer sync misseed!\n");

		wc->lastchan = -1;

		return;

	}

	else if(wc->lastchan != x)

	{

		printk("buffer re-sync occur from %d to %d\n", wc->lastchan, x);

		wc->lastchan = x;

	}

	chan_offset = (wc->lastchan*4 + 4 ) % (MAX_NUM_CARDS+NUM_FLAG);

	for (x=0;x<DAHDI_CHUNKSIZE;x++) {

#ifdef __BIG_ENDIAN

	// operation pending...

#else

		for (y=0;y<wc->max_cards/*MAX_NUM_CARDS*/;y++) { 

			if (wc->cardflag & (1 << y))

				wc->chans[y]->readchunk[x] = rxbuf[(MAX_NUM_CARDS+NUM_FLAG) * x + ((y + chan_offset ) & 0x0f)];

#ifdef TEST_LOG_INCOME_VOICE

			wc->voc_buf[y][wc->voc_ptr[y]] = rxbuf[(MAX_NUM_CARDS+NUM_FLAG) * x + ((y + chan_offset) & 0x0f)];

			wc->voc_ptr[y]++;

			if(wc->voc_ptr[y] >= voc_buffer_size)

				wc->voc_ptr[y] = 0;

#endif		

		}

#endif

	}

	if(cidbeforering)

	{

		for(x=0; x<wc->max_cards; x++)

		{

			if (wc->modtype[wc->chans[x]->chanpos - 1] == MOD_TYPE_FXO)

				if(wc->mod[wc->chans[x]->chanpos - 1].fxo.offhook == 0)

				{

					/*unsigned int *p_readchunk, *p_cid_history;

					p_readchunk = (unsigned int*)wc->chans[x].readchunk;

					p_cid_history = (unsigned int*)(wc->cid_history_buf[x] + wc->cid_history_ptr[x]);*/

					if(wc->cid_state[x] == CID_STATE_IDLE)	/* we need copy data to the cid voice buffer */

					{

						memcpy(wc->cid_history_buf[x] + wc->cid_history_ptr[x], wc->chans[x]->readchunk, DAHDI_CHUNKSIZE);

						wc->cid_history_ptr[x] = (wc->cid_history_ptr[x] + DAHDI_CHUNKSIZE)%(cidbuflen * DAHDI_MAX_CHUNKSIZE);

					}

					else if (wc->cid_state[x] == CID_STATE_RING_ON)

						wc->cid_history_clone_cnt[x] = cidbuflen;

					else if (wc->cid_state[x] == CID_STATE_RING_OFF)

					{ 

						if(wc->cid_history_clone_cnt[x])

						{	

							memcpy(wc->chans[x]->readchunk, wc->cid_history_buf[x] + wc->cid_history_ptr[x], DAHDI_MAX_CHUNKSIZE);

							wc->cid_history_clone_cnt[x]--;

							wc->cid_history_ptr[x] = (wc->cid_history_ptr[x] + DAHDI_MAX_CHUNKSIZE)%(cidbuflen * DAHDI_MAX_CHUNKSIZE);

						}

						else

						{

							wc->cid_state[x] = CID_STATE_WAIT_RING_FINISH;

							wc->cid_history_clone_cnt[x] = cidtimeout; /* wait 6 sec, if no ring, return to idle */

						}

					}

					else if(wc->cid_state[x] == CID_STATE_WAIT_RING_FINISH)

					{

						if(wc->cid_history_clone_cnt[x] > 0)

							wc->cid_history_clone_cnt[x]--;

						else

						{

							wc->cid_state[x] = CID_STATE_IDLE;

							wc->cid_history_ptr[x] = 0;

							wc->cid_history_clone_cnt[x] = 0;

						}

					}

				}

		}		

	}

#ifdef AUDIO_RINGCHECK

	for (x=0;x<wc->max_cards;x++)

		ring_check(wc, x);

#endif		

	/* XXX We're wasting 8 taps.  We should get closer :( */

	for (x = 0; x < wc->max_cards/*MAX_NUM_CARDS*/; x++) {

		if (wc->cardflag & (1 << x))

			dahdi_ec_chunk(wc->chans[x], wc->chans[x]->readchunk, wc->chans[x]->writechunk);

	}

	dahdi_receive(&wc->span);

}

static void wctdm_stop_dma(struct wctdm *wc);

static void wctdm_reset_tdm(struct wctdm *wc);

static void wctdm_restart_dma(struct wctdm *wc);

static unsigned char __wctdm_getcreg(struct wctdm *wc, unsigned char reg);

static void __wctdm_setcreg(struct wctdm *wc, unsigned char reg, unsigned char val);

static inline void __write_8bits(struct wctdm *wc, unsigned char bits)

{

	if(spibyhw == 0)

	{

		int x;

		/* Drop chip select */

		wc->ios |= BIT_SCLK;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

		wc->ios &= ~BIT_CS;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

		for (x=0;x<8;x++) {

			/* Send out each bit, MSB first, drop SCLK as we do so */

			if (bits & 0x80)

				wc->ios |= BIT_SDI;

			else

				wc->ios &= ~BIT_SDI;

			wc->ios &= ~BIT_SCLK;

			outb(wc->ios, wc->ioaddr + WC_AUXD);

			/* Now raise SCLK high again and repeat */

			wc->ios |= BIT_SCLK;

			outb(wc->ios, wc->ioaddr + WC_AUXD);

			bits <<= 1;

		}

		/* Finally raise CS back high again */

		wc->ios |= BIT_CS;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

	}

	else

	{

		__wctdm_setcreg(wc, WC_SPIDATA, bits);

		__wctdm_setcreg(wc, WC_SPICTRL, BIT_SPI_BYHW | BIT_SPI_START);

		while ((__wctdm_getcreg(wc, WC_SPICTRL) & BIT_SPI_BUSY) != 0);

		__wctdm_setcreg(wc, WC_SPICTRL, BIT_SPI_BYHW);

	}

}

static inline void __reset_spi(struct wctdm *wc)

{

	__wctdm_setcreg(wc, WC_SPICTRL, 0);

	/* Drop chip select and clock once and raise and clock once */

	wc->ios |= BIT_SCLK;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	wc->ios &= ~BIT_CS;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	wc->ios |= BIT_SDI;

	wc->ios &= ~BIT_SCLK;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	/* Now raise SCLK high again and repeat */

	wc->ios |= BIT_SCLK;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	/* Finally raise CS back high again */

	wc->ios |= BIT_CS;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	/* Clock again */

	wc->ios &= ~BIT_SCLK;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	/* Now raise SCLK high again and repeat */

	wc->ios |= BIT_SCLK;

	outb(wc->ios, wc->ioaddr + WC_AUXD);

	__wctdm_setcreg(wc, WC_SPICTRL, spibyhw);

}

static inline unsigned char __read_8bits(struct wctdm *wc)

{

	unsigned char res=0, c;

	int x;

	if(spibyhw == 0)

	{

		wc->ios &= ~BIT_CS;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

		/* Drop chip select */

		wc->ios &= ~BIT_CS;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

		for (x=0;x<8;x++) {

			res <<= 1;

			/* Get SCLK */

			wc->ios &= ~BIT_SCLK;

			outb(wc->ios, wc->ioaddr + WC_AUXD);

			/* Read back the value */

			c = inb(wc->ioaddr + WC_AUXR);

			if (c & BIT_SDO)

				res |= 1;

			/* Now raise SCLK high again */

			wc->ios |= BIT_SCLK;

			outb(wc->ios, wc->ioaddr + WC_AUXD);

		}

		/* Finally raise CS back high again */

		wc->ios |= BIT_CS;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

		wc->ios &= ~BIT_SCLK;

		outb(wc->ios, wc->ioaddr + WC_AUXD);

	}

	else

	{

		__wctdm_setcreg(wc, WC_SPICTRL, BIT_SPI_BYHW | BIT_SPI_START);

		while ((__wctdm_getcreg(wc, WC_SPICTRL) & BIT_SPI_BUSY) != 0);

		res = __wctdm_getcreg(wc, WC_SPIDATA);

		__wctdm_setcreg(wc, WC_SPICTRL, BIT_SPI_BYHW);

	}

	/* And return our result */

	return res;

}

static void __wctdm_setcreg_mem(struct wctdm *wc, unsigned char reg, unsigned char val)

{

	unsigned int *p = (unsigned int*)(wc->mem32 + WC_REGBASE + ((reg & 0xf) << 2));

	*p = val;

}

static unsigned char __wctdm_getcreg_mem(struct wctdm *wc, unsigned char reg)

{

	unsigned int *p = (unsigned int*)(wc->mem32 + WC_REGBASE + ((reg & 0xf) << 2));

	return (*p)&0x00ff;

}

static void __wctdm_setcreg(struct wctdm *wc, unsigned char reg, unsigned char val)

{

	if(usememio)

		__wctdm_setcreg_mem(wc, reg, val);

	else

		outb(val, wc->ioaddr + WC_REGBASE + ((reg & 0xf) << 2));

}

static unsigned char __wctdm_getcreg(struct wctdm *wc, unsigned char reg)

{

	if(usememio)

		return __wctdm_getcreg_mem(wc, reg);

	else

		return inb(wc->ioaddr + WC_REGBASE + ((reg & 0xf) << 2));

}

static inline void __wctdm_setcard(struct wctdm *wc, int card)

{

	if (wc->curcard != card) {

		__wctdm_setcreg(wc, WC_CS, card);

		wc->curcard = card;

		//printk("Select card %d\n", card);

	}

}

static void __wctdm_setreg(struct wctdm *wc, int card, unsigned char reg, unsigned char value)

{

	__wctdm_setcard(wc, card);

	if (wc->modtype[card] == MOD_TYPE_FXO) {

		__write_8bits(wc, 0x20);

		__write_8bits(wc, reg & 0x7f);

	} else {

		__write_8bits(wc, reg & 0x7f);

	}

	__write_8bits(wc, value);

}

static void wctdm_setreg(struct wctdm *wc, int card, unsigned char reg, unsigned char value)

{

	unsigned long flags;

	spin_lock_irqsave(&wc->lock, flags);

	__wctdm_setreg(wc, card, reg, value);

	spin_unlock_irqrestore(&wc->lock, flags);

}

static unsigned char __wctdm_getreg(struct wctdm *wc, int card, unsigned char reg)

{

	__wctdm_setcard(wc, card);

	if (wc->modtype[card] == MOD_TYPE_FXO) {

		__write_8bits(wc, 0x60);

		__write_8bits(wc, reg & 0x7f);

	} else {

		__write_8bits(wc, reg | 0x80);

	}

	return __read_8bits(wc);

}

static inline void reset_spi(struct wctdm *wc, int card)

{

	unsigned long flags;

	spin_lock_irqsave(&wc->lock, flags);

	__wctdm_setcard(wc, card);

	__reset_spi(wc);

	__reset_spi(wc);

	spin_unlock_irqrestore(&wc->lock, flags);

}

static unsigned char wctdm_getreg(struct wctdm *wc, int card, unsigned char reg)

{

	unsigned long flags;

	unsigned char res;

	spin_lock_irqsave(&wc->lock, flags);

	res = __wctdm_getreg(wc, card, reg);

	spin_unlock_irqrestore(&wc->lock, flags);

	return res;

}

static int __wait_access(struct wctdm *wc, int card)

{

    unsigned char data = 0;

    long origjiffies;

    int count = 0;

    #define MAX 6000 /* attempts */

    origjiffies = jiffies;

    /* Wait for indirect access */

    while (count++ < MAX)

	 {

		data = __wctdm_getreg(wc, card, I_STATUS);

		if (!data)

			return 0;

	 }

    if(count > (MAX-1)) printk(KERN_NOTICE " ##### Loop error (%02x) #####\n", data);

	return 0;

}

static unsigned char translate_3215(unsigned char address)

{

	int x;

	for (x=0;x<sizeof(indirect_regs)/sizeof(indirect_regs[0]);x++) {

		if (indirect_regs[x].address == address) {

			address = indirect_regs[x].altaddr;

			break;

		}

	}

	return address;

}

static int wctdm_proslic_setreg_indirect(struct wctdm *wc, int card, unsigned char address, unsigned short data)

{

	unsigned long flags;

	int res = -1;

	/* Translate 3215 addresses */

	if (wc->flags[card] & FLAG_3215) {

		address = translate_3215(address);

		if (address == 255)

			return 0;

	}

	spin_lock_irqsave(&wc->lock, flags);

	if(!__wait_access(wc, card)) {

		__wctdm_setreg(wc, card, IDA_LO,(unsigned char)(data & 0xFF));

		__wctdm_setreg(wc, card, IDA_HI,(unsigned char)((data & 0xFF00)>>8));

		__wctdm_setreg(wc, card, IAA,address);

		res = 0;

	};

	spin_unlock_irqrestore(&wc->lock, flags);

	return res;

}

static int wctdm_proslic_getreg_indirect(struct wctdm *wc, int card, unsigned char address)

{ 

	unsigned long flags;

	int res = -1;

	char *p=NULL;

	/* Translate 3215 addresses */

	if (wc->flags[card] & FLAG_3215) {

		address = translate_3215(address);

		if (address == 255)

			return 0;

	}

	spin_lock_irqsave(&wc->lock, flags);

	if (!__wait_access(wc, card)) {

		__wctdm_setreg(wc, card, IAA, address);

		if (!__wait_access(wc, card)) {

			unsigned char data1, data2;

			data1 = __wctdm_getreg(wc, card, IDA_LO);

			data2 = __wctdm_getreg(wc, card, IDA_HI);

			res = data1 | (data2 << 8);

		} else

			p = "Failed to wait inside\n";

	} else

		p = "failed to wait\n";

	spin_unlock_irqrestore(&wc->lock, flags);

	if (p)

		printk(KERN_NOTICE "%s", p);

	return res;

}

static int wctdm_proslic_init_indirect_regs(struct wctdm *wc, int card)

{

	unsigned char i;

	for (i=0; i<sizeof(indirect_regs) / sizeof(indirect_regs[0]); i++)

	{

		if(wctdm_proslic_setreg_indirect(wc, card, indirect_regs[i].address,indirect_regs[i].initial))

			return -1;

	}

	return 0;

}

static int wctdm_proslic_verify_indirect_regs(struct wctdm *wc, int card)

{ 

	int passed = 1;

	unsigned short i, initial;

	int j;

	for (i=0; i<sizeof(indirect_regs) / sizeof(indirect_regs[0]); i++) 

	{

		if((j = wctdm_proslic_getreg_indirect(wc, card, (unsigned char) indirect_regs[i].address)) < 0) {

			printk(KERN_NOTICE "Failed to read indirect register %d\n", i);

			return -1;

		}

		initial= indirect_regs[i].initial;

		if ( j != initial && (!(wc->flags[card] & FLAG_3215) || (indirect_regs[i].altaddr != 255)))

		{

			 printk(KERN_NOTICE "!!!!!!! %s  iREG %X = %X  should be %X\n",

				indirect_regs[i].name,indirect_regs[i].address,j,initial );

			 passed = 0;

		}	

	}

    if (passed) {

		if (debug)

			printk(KERN_DEBUG "Init Indirect Registers completed successfully.\n");

    } else {

		printk(KERN_NOTICE " !!!!! Init Indirect Registers UNSUCCESSFULLY.\n");

		return -1;

    }

    return 0;

}

static inline void wctdm_proslic_recheck_sanity(struct wctdm *wc, int card)

{

	int res;

	/* Check loopback */

	res = wc->reg1shadow[card];

	if (!res && (res != wc->mod[card].fxs.lasttxhook))     // read real state from register   By wx

		res=wctdm_getreg(wc, card, 64);

	if (!res && (res != wc->mod[card].fxs.lasttxhook)) {

		res = wctdm_getreg(wc, card, 8);

		if (res) {

			printk(KERN_NOTICE "Ouch, part reset, quickly restoring reality (%d)\n", card);

			wctdm_init_proslic(wc, card, 1, 0, 1);

		} else {

			if (wc->mod[card].fxs.palarms++ < MAX_ALARMS) {

				printk(KERN_NOTICE "Power alarm on module %d, resetting!\n", card + 1);

				if (wc->mod[card].fxs.lasttxhook == 4)

					wc->mod[card].fxs.lasttxhook = 1;

				wctdm_setreg(wc, card, 64, wc->mod[card].fxs.lasttxhook);

			} else {

				if (wc->mod[card].fxs.palarms == MAX_ALARMS)

					printk(KERN_NOTICE "Too many power alarms on card %d, NOT resetting!\n", card + 1);

			}

		}

	}

}

static inline void wctdm_voicedaa_check_hook(struct wctdm *wc, int card)

{

#define MS_PER_CHECK_HOOK 16

#ifndef AUDIO_RINGCHECK

	unsigned char res;

#endif	

	signed char b;

	int errors = 0;

	struct fxo *fxo = &wc->mod[card].fxo;

	/* Try to track issues that plague slot one FXO's */

	b = wc->reg0shadow[card];

	if ((b & 0x2) || !(b & 0x8)) {

		/* Not good -- don't look at anything else */

		if (debug)

			printk(KERN_DEBUG "Error (%02x) on card %d!\n", b, card + 1); 

		errors++;

	}

	b &= 0x9b;

	if (fxo->offhook) {

		if (b != 0x9)

			wctdm_setreg(wc, card, 5, 0x9);

	} else {

		if (b != 0x8)

			wctdm_setreg(wc, card, 5, 0x8);

	}

	if (errors)

		return;

	if (!fxo->offhook) {

 if(fixedtimepolarity) {

			if ( wc->cid_state[card] == CID_STATE_RING_ON && wc->cid_ring_on_time[card]>0)

			{

 	if(wc->cid_ring_on_time[card]>=fixedtimepolarity )

			{

			dahdi_qevent_lock(wc->chans[card], DAHDI_EVENT_POLARITY);

			wc->cid_ring_on_time[card] = -1;	/* the polarity already sent */	

			}

			else

		wc->cid_ring_on_time[card] += 16;

    }

}

		if (fwringdetect) {

			res = wc->reg0shadow[card] & 0x60;

			if (fxo->ringdebounce) {

				--fxo->ringdebounce;

				if (res && (res != fxo->lastrdtx) &&

				    (fxo->battery == BATTERY_PRESENT)) {

					if (!fxo->wasringing) {

						fxo->wasringing = 1;

						if (debug)

          printk(KERN_DEBUG "RING on %d/%d!\n", wc->span.spanno, card + 1);

	if(cidbeforering)

						{

							if(wc->cid_state[card] == CID_STATE_IDLE)

							{

								wc->cid_state[card] = CID_STATE_RING_ON;

								wc->cid_ring_on_time[card] = 16;	/* check every 16ms */

							}

							else

								dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_RING);

						}

						else 							

        dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_RING);

					}

					fxo->lastrdtx = res;

					fxo->ringdebounce = 10;

				} else if (!res) {

					if ((fxo->ringdebounce == 0) && fxo->wasringing) {

				fxo->wasringing = 0;

				if (debug)

				printk(KERN_DEBUG "NO RING on %d/%d!\n", wc->span.spanno, card + 1);

	if(cidbeforering)

						{

							if(wc->cid_state[card] == CID_STATE_RING_ON)

							{

								if(fixedtimepolarity==0)

									dahdi_qevent_lock(wc->chans[card], DAHDI_EVENT_POLARITY);

								wc->cid_state[card] = CID_STATE_RING_OFF;

							}

							else 

							{

								if(wc->cid_state[card] == CID_STATE_WAIT_RING_FINISH)

									wc->cid_history_clone_cnt[card] = cidtimeout;

								dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

							}

						}

						else

						dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

				}

				}

			} else if (res && (fxo->battery == BATTERY_PRESENT)) {

				fxo->lastrdtx = res;

				fxo->ringdebounce = 10;

			}

		} else {

			res = wc->reg0shadow[card];

			if ((res & 0x60) && (fxo->battery == BATTERY_PRESENT)) {

				fxo->ringdebounce += (DAHDI_CHUNKSIZE * 16);

				if (fxo->ringdebounce >= DAHDI_CHUNKSIZE * ringdebounce) {

					if (!fxo->wasringing) {

						fxo->wasringing = 1;

 if(cidbeforering)

						{

							if(wc->cid_state[card] == CID_STATE_IDLE)

							{	

								wc->cid_state[card] = CID_STATE_RING_ON;

								wc->cid_ring_on_time[card] = 16;		/* check every 16ms */

							}

							else

								dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_RING);

						}

						else      

						dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_RING);

						if (debug)

							printk(KERN_DEBUG "RING on %d/%d!\n", wc->span.spanno, card + 1);

					}

					fxo->ringdebounce = DAHDI_CHUNKSIZE * ringdebounce;

				}

			} else {

				fxo->ringdebounce -= DAHDI_CHUNKSIZE * 4;

				if (fxo->ringdebounce <= 0) {

					if (fxo->wasringing) {

						fxo->wasringing = 0;

	if(cidbeforering)

						{

							if(wc->cid_state[card] == CID_STATE_RING_ON)

							{

								if(fixedtimepolarity==0)

									dahdi_qevent_lock(wc->chans[card], DAHDI_EVENT_POLARITY);

								wc->cid_state[card] = CID_STATE_RING_OFF;

							}

							else 

							{

								if(wc->cid_state[card] == CID_STATE_WAIT_RING_FINISH)

									wc->cid_history_clone_cnt[card] = cidtimeout;

								dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

							}

						}

						else

						dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

						if (debug)

							printk(KERN_DEBUG "NO RING on %d/%d!\n", wc->span.spanno, card + 1);

					}

					fxo->ringdebounce = 0;

				}

			}

		}

	}

	b = wc->reg1shadow[card];

	if (abs(b) < battthresh) {

		/* possible existing states:

		   battery lost, no debounce timer

		   battery lost, debounce timer (going to battery present)

		   battery present or unknown, no debounce timer

		   battery present or unknown, debounce timer (going to battery lost)

		*/

		if (fxo->battery == BATTERY_LOST) {

			if (fxo->battdebounce) {

				/* we were going to BATTERY_PRESENT, but battery was lost again,

				   so clear the debounce timer */

				fxo->battdebounce = 0;

			}

		} else {

			if (fxo->battdebounce) {

				/* going to BATTERY_LOST, see if we are there yet */

				if (--fxo->battdebounce == 0) {

					fxo->battery = BATTERY_LOST;

					if (debug)

						printk(KERN_DEBUG "NO BATTERY on %d/%d!\n", wc->span.spanno, card + 1);

#ifdef	JAPAN

					if (!wc->ohdebounce && wc->offhook) {

						dahdi_hooksig(&wc->chans[card], DAHDI_RXSIG_ONHOOK);

						if (debug)

							printk(KERN_DEBUG "Signalled On Hook\n");

#ifdef	ZERO_BATT_RING

						wc->onhook++;

#endif

					}

#else

					dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_ONHOOK);

					/* set the alarm timer, taking into account that part of its time

					   period has already passed while debouncing occurred */

					fxo->battalarm = (battalarm - battdebounce) / MS_PER_CHECK_HOOK;

#endif

				}

			} else {

				/* start the debounce timer to verify that battery has been lost */

				fxo->battdebounce = battdebounce / MS_PER_CHECK_HOOK;

			}

		}

	} else {

		/* possible existing states:

		   battery lost or unknown, no debounce timer

		   battery lost or unknown, debounce timer (going to battery present)

		   battery present, no debounce timer

		   battery present, debounce timer (going to battery lost)

		*/

		if (fxo->battery == BATTERY_PRESENT) {

			if (fxo->battdebounce) {

				/* we were going to BATTERY_LOST, but battery appeared again,

				   so clear the debounce timer */

				fxo->battdebounce = 0;

			}

		} else {

			if (fxo->battdebounce) {

				/* going to BATTERY_PRESENT, see if we are there yet */

				if (--fxo->battdebounce == 0) {

					fxo->battery = BATTERY_PRESENT;

					if (debug)

						printk(KERN_DEBUG "BATTERY on %d/%d (%s)!\n", wc->span.spanno, card + 1, 

						       (b < 0) ? "-" : "+");			    

#ifdef	ZERO_BATT_RING

					if (wc->onhook) {

						wc->onhook = 0;

						dahdi_hooksig(&wc->chans[card], DAHDI_RXSIG_OFFHOOK);

						if (debug)

							printk(KERN_DEBUG "Signalled Off Hook\n");

					}

#else

					dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

#endif

					/* set the alarm timer, taking into account that part of its time

					   period has already passed while debouncing occurred */

					fxo->battalarm = (battalarm - battdebounce) / MS_PER_CHECK_HOOK;

				}

			} else {

				/* start the debounce timer to verify that battery has appeared */

				fxo->battdebounce = battdebounce / MS_PER_CHECK_HOOK;

			}

		}

	}

	if (fxo->lastpol >= 0) {

		if (b < 0) {

			fxo->lastpol = -1;

			fxo->polaritydebounce = POLARITY_DEBOUNCE / MS_PER_CHECK_HOOK;

		}

	} 

	if (fxo->lastpol <= 0) {

		if (b > 0) {

			fxo->lastpol = 1;

			fxo->polaritydebounce = POLARITY_DEBOUNCE / MS_PER_CHECK_HOOK;

		}

	}

	if (fxo->battalarm) {

		if (--fxo->battalarm == 0) {

			/* the alarm timer has expired, so update the battery alarm state

			   for this channel */

			dahdi_alarm_channel(wc->chans[card], fxo->battery == BATTERY_LOST ? DAHDI_ALARM_RED : DAHDI_ALARM_NONE);

		}

	}

	if (fxo->polaritydebounce) {

		if (--fxo->polaritydebounce == 0) {

		    if (fxo->lastpol != fxo->polarity) {

				if (debug)

					printk(KERN_DEBUG "%lu Polarity reversed (%d -> %d)\n", jiffies, 

				       fxo->polarity, 

				       fxo->lastpol);

				if (fxo->polarity)

					dahdi_qevent_lock(wc->chans[card], DAHDI_EVENT_POLARITY);

				fxo->polarity = fxo->lastpol;

		    }

		}

	}

#undef MS_PER_CHECK_HOOK

}

static inline void wctdm_proslic_check_hook(struct wctdm *wc, int card)

{

	char res;

	int hook;

	/* For some reason we have to debounce the

	   hook detector.  */

	res = wc->reg0shadow[card];

	hook = (res & 1);

	if (hook != wc->mod[card].fxs.lastrxhook) {

		/* Reset the debounce (must be multiple of 4ms) */

		wc->mod[card].fxs.debounce = 8 * (4 * 8);

#if 0

		printk(KERN_DEBUG "Resetting debounce card %d hook %d, %d\n", card, hook, wc->mod[card].fxs.debounce);

#endif

	} else {

		if (wc->mod[card].fxs.debounce > 0) {

			wc->mod[card].fxs.debounce-= 16 * DAHDI_CHUNKSIZE;

#if 0

			printk(KERN_DEBUG "Sustaining hook %d, %d\n", hook, wc->mod[card].fxs.debounce);

#endif

			if (!wc->mod[card].fxs.debounce) {

#if 0

				printk(KERN_DEBUG "Counted down debounce, newhook: %d...\n", hook);

#endif

				wc->mod[card].fxs.debouncehook = hook;

			}

			if (!wc->mod[card].fxs.oldrxhook && wc->mod[card].fxs.debouncehook) {

				/* Off hook */

#if 1

				if (debug)

#endif				

					printk(KERN_DEBUG "opvxa1200: Card %d Going off hook\n", card);

				dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_OFFHOOK);

				if (robust)

					wctdm_init_proslic(wc, card, 1, 0, 1);

				wc->mod[card].fxs.oldrxhook = 1;

			} else if (wc->mod[card].fxs.oldrxhook && !wc->mod[card].fxs.debouncehook) {

				/* On hook */

#if 1

				if (debug)

#endif				

					printk(KERN_DEBUG "opvxa1200: Card %d Going on hook\n", card);

				dahdi_hooksig(wc->chans[card], DAHDI_RXSIG_ONHOOK);

				wc->mod[card].fxs.oldrxhook = 0;

			}

		}

	}

	wc->mod[card].fxs.lastrxhook = hook;

}

DAHDI_IRQ_HANDLER(wctdm_interrupt)

{

	struct wctdm *wc = dev_id;

	unsigned char ints;

	int x, y, z;

	int mode;

	ints = inb(wc->ioaddr + WC_INTSTAT);

	if (!ints)

		return IRQ_NONE;

	outb(ints, wc->ioaddr + WC_INTSTAT);

	if (ints & 0x10) {

		/* Stop DMA, wait for watchdog */

		printk(KERN_INFO "TDM PCI Master abort\n");

		wctdm_stop_dma(wc);

		return IRQ_RETVAL(1);

	}

	if (ints & 0x20) {

		printk(KERN_INFO "PCI Target abort\n");

		return IRQ_RETVAL(1);

	}

	for (x=0;x<wc->max_cards/*4*3*/;x++) {

		if (wc->cardflag & (1 << x) &&

		    (wc->modtype[x] == MOD_TYPE_FXS)) {

			if (wc->mod[x].fxs.lasttxhook == 0x4) {

				/* RINGing, prepare for OHT */

				wc->mod[x].fxs.ohttimer = OHT_TIMER << 3;

				if (reversepolarity)

					wc->mod[x].fxs.idletxhookstate = 0x6;	/* OHT mode when idle */

				else

					wc->mod[x].fxs.idletxhookstate = 0x2; 

			} else {

				if (wc->mod[x].fxs.ohttimer) {

					wc->mod[x].fxs.ohttimer-= DAHDI_CHUNKSIZE;

					if (!wc->mod[x].fxs.ohttimer) {

						if (reversepolarity)

							wc->mod[x].fxs.idletxhookstate = 0x5;	/* Switch to active */

						else

							wc->mod[x].fxs.idletxhookstate = 0x1;

						if ((wc->mod[x].fxs.lasttxhook == 0x2) || (wc->mod[x].fxs.lasttxhook == 0x6)) {

							/* Apply the change if appropriate */

							if (reversepolarity) 

								wc->mod[x].fxs.lasttxhook = 0x5;

							else

								wc->mod[x].fxs.lasttxhook = 0x1;

							wctdm_setreg(wc, x, 64, wc->mod[x].fxs.lasttxhook);

						}

					}

				}

			}

		}

	}

	if (ints & 0x0f) {

		wc->intcount++;

		z = wc->intcount & 0x3;

		mode = wc->intcount & 0xc;

		for(y=0; y<wc->max_cards/4/*3*/; y++)

		{

			x = z + y*4;

			if (wc->cardflag & (1 << x ) ) 

			{

				switch(mode) 

				{

				case 0:

					/* Rest */

					break;

				case 4:

					/* Read first shadow reg */

					if (wc->modtype[x] == MOD_TYPE_FXS)

						wc->reg0shadow[x] = wctdm_getreg(wc, x, 68);

					else if (wc->modtype[x] == MOD_TYPE_FXO)

						wc->reg0shadow[x] = wctdm_getreg(wc, x, 5);

					break;

				case 8:

					/* Read second shadow reg */

					if (wc->modtype[x] == MOD_TYPE_FXS)

						wc->reg1shadow[x] = wctdm_getreg(wc, x, 64);

					else if (wc->modtype[x] == MOD_TYPE_FXO)

						wc->reg1shadow[x] = wctdm_getreg(wc, x, 29);

					break;

				case 12:

					/* Perform processing */

					if (wc->modtype[x] == MOD_TYPE_FXS) {

						wctdm_proslic_check_hook(wc, x);

						if (!(wc->intcount & 0xf0))

							wctdm_proslic_recheck_sanity(wc, x);

					} else if (wc->modtype[x] == MOD_TYPE_FXO) {

						wctdm_voicedaa_check_hook(wc, x);

					}

					break;

				}

			}

		}

		if (!(wc->intcount % 10000)) {

			/* Accept an alarm once per 10 seconds */

			for (x=0;x<wc->max_cards/*4*3*/;x++) 

				if (wc->modtype[x] == MOD_TYPE_FXS) {

					if (wc->mod[x].fxs.palarms)

						wc->mod[x].fxs.palarms--;

				}

		}

		wctdm_receiveprep(wc, ints);

		wctdm_transmitprep(wc, ints);

	}

	return IRQ_RETVAL(1);

}

static int wctdm_voicedaa_insane(struct wctdm *wc, int card)

{

	int blah;

	blah = wctdm_getreg(wc, card, 2);

	if (blah != 0x3)

		return -2;

	blah = wctdm_getreg(wc, card, 11);

	if (debug)

		printk(KERN_DEBUG "VoiceDAA System: %02x\n", blah & 0xf);

	return 0;

}

static int wctdm_proslic_insane(struct wctdm *wc, int card)

{

	int blah,insane_report;

	insane_report=0;

	blah = wctdm_getreg(wc, card, 0);

	if (debug) 

		printk(KERN_DEBUG "ProSLIC on module %d, product %d, version %d\n", card, (blah & 0x30) >> 4, (blah & 0xf));

#if 0

	if ((blah & 0x30) >> 4) {

		printk(KERN_DEBUG "ProSLIC on module %d is not a 3210.\n", card);

		return -1;

	}

#endif

	if (((blah & 0xf) == 0) || ((blah & 0xf) == 0xf)) {

		/* SLIC not loaded */

		return -1;

	}

	if ((blah & 0xf) < 2) {

		printk(KERN_NOTICE "ProSLIC 3210 version %d is too old\n", blah & 0xf);

		return -1;

	}

	if (wctdm_getreg(wc, card, 1) & 0x80)

	/* ProSLIC 3215, not a 3210 */

		wc->flags[card] |= FLAG_3215;

	blah = wctdm_getreg(wc, card, 8);

	if (blah != 0x2) {

		printk(KERN_NOTICE  "ProSLIC on module %d insane (1) %d should be 2\n", card, blah);

		return -1;

	} else if ( insane_report)

		printk(KERN_NOTICE  "ProSLIC on module %d Reg 8 Reads %d Expected is 0x2\n",card,blah);

	blah = wctdm_getreg(wc, card, 64);

	if (blah != 0x0) {

		printk(KERN_NOTICE  "ProSLIC on module %d insane (2)\n", card);

		return -1;

	} else if ( insane_report)

		printk(KERN_NOTICE  "ProSLIC on module %d Reg 64 Reads %d Expected is 0x0\n",card,blah);

	blah = wctdm_getreg(wc, card, 11);

	if (blah != 0x33) {

		printk(KERN_NOTICE  "ProSLIC on module %d insane (3)\n", card);

		return -1;

	} else if ( insane_report)

		printk(KERN_NOTICE  "ProSLIC on module %d Reg 11 Reads %d Expected is 0x33\n",card,blah);

	/* Just be sure it's setup right. */

	wctdm_setreg(wc, card, 30, 0);

	if (debug) 

		printk(KERN_DEBUG "ProSLIC on module %d seems sane.\n", card);

	return 0;

}

static int wctdm_proslic_powerleak_test(struct wctdm *wc, int card)

{

	unsigned long origjiffies;

	unsigned char vbat;

	/* Turn off linefeed */

	wctdm_setreg(wc, card, 64, 0);

	/* Power down */

	wctdm_setreg(wc, card, 14, 0x10);

	/* Wait for one second */

	origjiffies = jiffies;

	while((vbat = wctdm_getreg(wc, card, 82)) > 0x6) {

		if ((jiffies - origjiffies) >= (HZ/2))

			break;;

	}

	if (vbat < 0x06) {

		printk(KERN_NOTICE "Excessive leakage detected on module %d: %d volts (%02x) after %d ms\n", card,

		       376 * vbat / 1000, vbat, (int)((jiffies - origjiffies) * 1000 / HZ));

		return -1;

	} else if (debug) {

		printk(KERN_NOTICE "Post-leakage voltage: %d volts\n", 376 * vbat / 1000);

	}

	return 0;

}

static int wctdm_powerup_proslic(struct wctdm *wc, int card, int fast)

{

	unsigned char vbat;

	unsigned long origjiffies;

	int lim;

	/* Set period of DC-DC converter to 1/64 khz */

	wctdm_setreg(wc, card, 92, 0xff /* was 0xff */);

	/* Wait for VBat to powerup */

	origjiffies = jiffies;

	/* Disable powerdown */

	wctdm_setreg(wc, card, 14, 0);

	/* If fast, don't bother checking anymore */

	if (fast)

		return 0;

	while((vbat = wctdm_getreg(wc, card, 82)) < 0xc0) {

		/* Wait no more than 500ms */

		if ((jiffies - origjiffies) > HZ/2) {

			break;

		}

	}

	if (vbat < 0xc0) {

		if (wc->proslic_power == PROSLIC_POWER_UNKNOWN)

				 printk(KERN_NOTICE "ProSLIC on module %d failed to powerup within %d ms (%d mV only)\n\n -- DID YOU REMEMBER TO PLUG IN THE HD POWER CABLE TO THE A1200P??\n",

					card, (int)(((jiffies - origjiffies) * 1000 / HZ)),

					vbat * 375);

		wc->proslic_power = PROSLIC_POWER_WARNED;

		return -1;

	} else if (debug) {

		printk(KERN_DEBUG "ProSLIC on module %d powered up to -%d volts (%02x) in %d ms\n",

		       card, vbat * 376 / 1000, vbat, (int)(((jiffies - origjiffies) * 1000 / HZ)));

	}

	wc->proslic_power = PROSLIC_POWER_ON;

        /* Proslic max allowed loop current, reg 71 LOOP_I_LIMIT */

        /* If out of range, just set it to the default value     */

        lim = (loopcurrent - 20) / 3;

        if ( loopcurrent > 41 ) {

                lim = 0;

                if (debug)

                        printk(KERN_DEBUG "Loop current out of range! Setting to default 20mA!\n");

        }

        else if (debug)

                        printk(KERN_DEBUG "Loop current set to %dmA!\n",(lim*3)+20);

        wctdm_setreg(wc,card,LOOP_I_LIMIT,lim);

	/* Engage DC-DC converter */

	wctdm_setreg(wc, card, 93, 0x19 /* was 0x19 */);

#if 0

	origjiffies = jiffies;

	while(0x80 & wctdm_getreg(wc, card, 93)) {

		if ((jiffies - origjiffies) > 2 * HZ) {

			printk(KERN_DEBUG "Timeout waiting for DC-DC calibration on module %d\n", card);

			return -1;

		}

	}

#if 0

	/* Wait a full two seconds */

	while((jiffies - origjiffies) < 2 * HZ);

	/* Just check to be sure */

	vbat = wctdm_getreg(wc, card, 82);

	printk(KERN_DEBUG "ProSLIC on module %d powered up to -%d volts (%02x) in %d ms\n",

		       card, vbat * 376 / 1000, vbat, (int)(((jiffies - origjiffies) * 1000 / HZ)));

#endif

#endif

	return 0;

}

static int wctdm_proslic_manual_calibrate(struct wctdm *wc, int card){

	unsigned long origjiffies;

	unsigned char i;

	wctdm_setreg(wc, card, 21, 0);//(0)  Disable all interupts in DR21

	wctdm_setreg(wc, card, 22, 0);//(0)Disable all interupts in DR21

	wctdm_setreg(wc, card, 23, 0);//(0)Disable all interupts in DR21

	wctdm_setreg(wc, card, 64, 0);//(0)

	wctdm_setreg(wc, card, 97, 0x18); //(0x18)Calibrations without the ADC and DAC offset and without common mode calibration.

	wctdm_setreg(wc, card, 96, 0x47); //(0x47)	Calibrate common mode and differential DAC mode DAC + ILIM

	origjiffies=jiffies;

	while( wctdm_getreg(wc,card,96)!=0 ){

		if((jiffies-origjiffies)>80)

			return -1;

	}

//Initialized DR 98 and 99 to get consistant results.

// 98 and 99 are the results registers and the search should have same intial conditions.

/*******************************The following is the manual gain mismatch calibration****************************/

/*******************************This is also available as a function *******************************************/

	// Delay 10ms

	origjiffies=jiffies; 

	while((jiffies-origjiffies)<1);

	wctdm_proslic_setreg_indirect(wc, card, 88,0);

	wctdm_proslic_setreg_indirect(wc,card,89,0);

	wctdm_proslic_setreg_indirect(wc,card,90,0);

	wctdm_proslic_setreg_indirect(wc,card,91,0);

	wctdm_proslic_setreg_indirect(wc,card,92,0);

	wctdm_proslic_setreg_indirect(wc,card,93,0);

	wctdm_setreg(wc, card, 98,0x10); // This is necessary if the calibration occurs other than at reset time

	wctdm_setreg(wc, card, 99,0x10);

	for ( i=0x1f; i>0; i--)

	{

		wctdm_setreg(wc, card, 98,i);

		origjiffies=jiffies; 

		while((jiffies-origjiffies)<4);

		if((wctdm_getreg(wc,card,88)) == 0)

			break;

	} // for

	for ( i=0x1f; i>0; i--)

	{

		wctdm_setreg(wc, card, 99,i);

		origjiffies=jiffies; 

		while((jiffies-origjiffies)<4);

		if((wctdm_getreg(wc,card,89)) == 0)

			break;

	}//for

/*******************************The preceding is the manual gain mismatch calibration****************************/

/**********************************The following is the longitudinal Balance Cal***********************************/

	wctdm_setreg(wc,card,64,1);

	while((jiffies-origjiffies)<10); // Sleep 100?

	wctdm_setreg(wc, card, 64, 0);

	wctdm_setreg(wc, card, 23, 0x4);  // enable interrupt for the balance Cal

	wctdm_setreg(wc, card, 97, 0x1); // this is a singular calibration bit for longitudinal calibration

	wctdm_setreg(wc, card, 96,0x40);

	wctdm_getreg(wc,card,96); /* Read Reg 96 just cause */

	wctdm_setreg(wc, card, 21, 0xFF);

	wctdm_setreg(wc, card, 22, 0xFF);

	wctdm_setreg(wc, card, 23, 0xFF);

	/**The preceding is the longitudinal Balance Cal***/

	return(0);

}

#if 1

static int wctdm_proslic_calibrate(struct wctdm *wc, int card)

{

	unsigned long origjiffies;

	int x;

	/* Perform all calibrations */

	wctdm_setreg(wc, card, 97, 0x1f);

	/* Begin, no speedup */

	wctdm_setreg(wc, card, 96, 0x5f);

	/* Wait for it to finish */

	origjiffies = jiffies;

	while(wctdm_getreg(wc, card, 96)) {

		if ((jiffies - origjiffies) > 2 * HZ) {

			printk(KERN_NOTICE "Timeout waiting for calibration of module %d\n", card);

			return -1;

		}

	}

	if (debug) {

		/* Print calibration parameters */

		printk(KERN_DEBUG "Calibration Vector Regs 98 - 107: \n");

		for (x=98;x<108;x++) {

			printk(KERN_DEBUG "%d: %02x\n", x, wctdm_getreg(wc, card, x));

		}

	}

	return 0;

}

#endif

static void wait_just_a_bit(int foo)

{

	long newjiffies;

	newjiffies = jiffies + foo;

	while(jiffies < newjiffies);

}

/*********************************************************************

 * Set the hwgain on the analog modules

 *

 * card = the card position for this module (0-23)

 * gain = gain in dB x10 (e.g. -3.5dB  would be gain=-35)

 * tx = (0 for rx; 1 for tx)

 *

 *******************************************************************/

static int wctdm_set_hwgain(struct wctdm *wc, int card, __s32 gain, __u32 tx)

{

	if (!(wc->modtype[card] == MOD_TYPE_FXO)) {

		printk(KERN_NOTICE "Cannot adjust gain.  Unsupported module type!\n");

		return -1;

	}

	if (tx) {

		if (debug)

			printk(KERN_DEBUG "setting FXO tx gain for card=%d to %d\n", card, gain);

		if (gain >=  -150 && gain <= 0) {

			wctdm_setreg(wc, card, 38, 16 + (gain/-10));

			wctdm_setreg(wc, card, 40, 16 + (-gain%10));

		} else if (gain <= 120 && gain > 0) {

			wctdm_setreg(wc, card, 38, gain/10);

			wctdm_setreg(wc, card, 40, (gain%10));

		} else {

			printk(KERN_INFO "FXO tx gain is out of range (%d)\n", gain);

			return -1;

		}

	} else { /* rx */

		if (debug)

			printk(KERN_DEBUG "setting FXO rx gain for card=%d to %d\n", card, gain);

		if (gain >=  -150 && gain <= 0) {

			wctdm_setreg(wc, card, 39, 16+ (gain/-10));

			wctdm_setreg(wc, card, 41, 16 + (-gain%10));

		} else if (gain <= 120 && gain > 0) {

			wctdm_setreg(wc, card, 39, gain/10);

			wctdm_setreg(wc, card, 41, (gain%10));

		} else {

			printk(KERN_INFO "FXO rx gain is out of range (%d)\n", gain);

			return -1;

		}

	}

	return 0;

}

static int wctdm_init_voicedaa(struct wctdm *wc, int card, int fast, int manual, int sane)

{

	unsigned char reg16=0, reg26=0, reg30=0, reg31=0;

	long newjiffies;

	wc->modtype[card] = MOD_TYPE_FXO;

	/* Sanity check the ProSLIC */

	reset_spi(wc, card);

	if (!sane && wctdm_voicedaa_insane(wc, card))

		return -2;

	/* Software reset */

	wctdm_setreg(wc, card, 1, 0x80);

	/* Wait just a bit */

	wait_just_a_bit(HZ/10);

	/* Enable PCM, ulaw */

	if (alawoverride)

		wctdm_setreg(wc, card, 33, 0x20);

	else

		wctdm_setreg(wc, card, 33, 0x28);

	/* Set On-hook speed, Ringer impedence, and ringer threshold */

	reg16 |= (fxo_modes[_opermode].ohs << 6);

	reg16 |= (fxo_modes[_opermode].rz << 1);

	reg16 |= (fxo_modes[_opermode].rt);

	wctdm_setreg(wc, card, 16, reg16);

	if(fwringdetect) {

		/* Enable ring detector full-wave rectifier mode */

		wctdm_setreg(wc, card, 18, 2);

		wctdm_setreg(wc, card, 24, 0);

	} else { 

		/* Set to the device defaults */

		wctdm_setreg(wc, card, 18, 0);

		wctdm_setreg(wc, card, 24, 0x19);

	}

	/* Set DC Termination:

	   Tip/Ring voltage adjust, minimum operational current, current limitation */

	reg26 |= (fxo_modes[_opermode].dcv << 6);

	reg26 |= (fxo_modes[_opermode].mini << 4);

	reg26 |= (fxo_modes[_opermode].ilim << 1);

	wctdm_setreg(wc, card, 26, reg26);

	/* Set AC Impedence */ 

	reg30 = (fxofullscale==1) ? (fxo_modes[_opermode].acim|0x10) :  (fxo_modes[_opermode].acim);

	wctdm_setreg(wc, card, 30, reg30);