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initio.c

/**************************************************************************
 * Initio 9100 device driver for Linux.
 *
 * Copyright (c) 1994-1998 Initio Corporation
 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
 * 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, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * --------------------------------------------------------------------------
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification, immediately at the beginning of the file.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Where this Software is combined with software released under the terms of 
 * the GNU General Public License ("GPL") and the terms of the GPL would require the 
 * combined work to also be released under the terms of the GPL, the terms
 * and conditions of this License will apply in addition to those of the
 * GPL with the exception of any terms or conditions of this License that
 * conflict with, or are expressly prohibited by, the GPL.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *************************************************************************
 *
 * DESCRIPTION:
 *
 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
 * adapters
 *
 * 08/06/97 hc    - v1.01h
 *          - Support inic-940 and inic-935
 * 09/26/97 hc    - v1.01i
 *          - Make correction from J.W. Schultz suggestion
 * 10/13/97 hc    - Support reset function
 * 10/21/97 hc    - v1.01j
 *          - Support 32 LUN (SCSI 3)
 * 01/14/98 hc    - v1.01k
 *          - Fix memory allocation problem
 * 03/04/98 hc    - v1.01l
 *          - Fix tape rewind which will hang the system problem
 *          - Set can_queue to tul_num_scb
 * 06/25/98 hc    - v1.01m
 *          - Get it work for kernel version >= 2.1.75
 *          - Dynamic assign SCSI bus reset holding time in init_tulip()
 * 07/02/98 hc    - v1.01n
 *          - Support 0002134A
 * 08/07/98 hc  - v1.01o
 *          - Change the tul_abort_srb routine to use scsi_done. <01>
 * 09/07/98 hl  - v1.02
 *              - Change the INI9100U define and proc_dir_entry to
 *                reflect the newer Kernel 2.1.118, but the v1.o1o
 *                should work with Kernel 2.1.118.
 * 09/20/98 wh  - v1.02a
 *              - Support Abort command.
 *              - Handle reset routine.
 * 09/21/98 hl  - v1.03
 *              - remove comments.
 * 12/09/98 bv    - v1.03a
 *          - Removed unused code
 * 12/13/98 bv    - v1.03b
 *          - Remove cli() locking for kernels >= 2.1.95. This uses
 *            spinlocks to serialize access to the pSRB_head and
 *            pSRB_tail members of the HCS structure.
 * 09/01/99 bv    - v1.03d
 *          - Fixed a deadlock problem in SMP.
 * 21/01/99 bv    - v1.03e
 *          - Add support for the Domex 3192U PCI SCSI
 *            This is a slightly modified patch by
 *            Brian Macy <bmacy@sunshinecomputing.com>
 * 22/02/99 bv    - v1.03f
 *          - Didn't detect the INIC-950 in 2.0.x correctly.
 *            Now fixed.
 * 05/07/99 bv    - v1.03g
 *          - Changed the assumption that HZ = 100
 * 10/17/03 mc    - v1.04
 *          - added new DMA API support
 * 06/01/04 jmd   - v1.04a
 *          - Re-add reset_bus support
 **************************************************************************/

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>

#include "initio.h"

#define SENSE_SIZE            14

#define i91u_MAXQUEUE         2
#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"

#define INI_VENDOR_ID   0x1101      /* Initio's PCI vendor ID       */
#define DMX_VENDOR_ID   0x134a      /* Domex's PCI vendor ID      */
#define I950_DEVICE_ID  0x9500      /* Initio's inic-950 product ID   */
#define I940_DEVICE_ID  0x9400      /* Initio's inic-940 product ID   */
#define I935_DEVICE_ID  0x9401      /* Initio's inic-935 product ID   */
#define I920_DEVICE_ID  0x0002      /* Initio's other product ID      */

#ifdef DEBUG_i91u
static unsigned int i91u_debug = DEBUG_DEFAULT;
#endif

#define TUL_RDWORD(x,y)         (short)(inl((int)((ULONG)((ULONG)x+(UCHAR)y)) ))

typedef struct PCI_ID_Struc {
      unsigned short vendor_id;
      unsigned short device_id;
} PCI_ID;

static int tul_num_ch = 4;    /* Maximum 4 adapters           */
static int tul_num_scb;
static int tul_tag_enable = 1;
static SCB *tul_scb;

#ifdef DEBUG_i91u
static int setup_debug = 0;
#endif

static void i91uSCBPost(BYTE * pHcb, BYTE * pScb);

static const PCI_ID i91u_pci_devices[] = {
      { INI_VENDOR_ID, I950_DEVICE_ID },
      { INI_VENDOR_ID, I940_DEVICE_ID },
      { INI_VENDOR_ID, I935_DEVICE_ID },
      { INI_VENDOR_ID, I920_DEVICE_ID },
      { DMX_VENDOR_ID, I920_DEVICE_ID },
};

#define DEBUG_INTERRUPT 0
#define DEBUG_QUEUE     0
#define DEBUG_STATE     0
#define INT_DISC  0

/*--- external functions --*/
static void tul_se2_wait(void);

/*--- forward refrence ---*/
static SCB *tul_find_busy_scb(HCS * pCurHcb, WORD tarlun);
static SCB *tul_find_done_scb(HCS * pCurHcb);

static int tulip_main(HCS * pCurHcb);

static int tul_next_state(HCS * pCurHcb);
static int tul_state_1(HCS * pCurHcb);
static int tul_state_2(HCS * pCurHcb);
static int tul_state_3(HCS * pCurHcb);
static int tul_state_4(HCS * pCurHcb);
static int tul_state_5(HCS * pCurHcb);
static int tul_state_6(HCS * pCurHcb);
static int tul_state_7(HCS * pCurHcb);
static int tul_xfer_data_in(HCS * pCurHcb);
static int tul_xfer_data_out(HCS * pCurHcb);
static int tul_xpad_in(HCS * pCurHcb);
static int tul_xpad_out(HCS * pCurHcb);
static int tul_status_msg(HCS * pCurHcb);

static int tul_msgin(HCS * pCurHcb);
static int tul_msgin_sync(HCS * pCurHcb);
static int tul_msgin_accept(HCS * pCurHcb);
static int tul_msgout_reject(HCS * pCurHcb);
static int tul_msgin_extend(HCS * pCurHcb);

static int tul_msgout_ide(HCS * pCurHcb);
static int tul_msgout_abort_targ(HCS * pCurHcb);
static int tul_msgout_abort_tag(HCS * pCurHcb);

static int tul_bus_device_reset(HCS * pCurHcb);
static void tul_select_atn(HCS * pCurHcb, SCB * pCurScb);
static void tul_select_atn3(HCS * pCurHcb, SCB * pCurScb);
static void tul_select_atn_stop(HCS * pCurHcb, SCB * pCurScb);
static int int_tul_busfree(HCS * pCurHcb);
static int int_tul_scsi_rst(HCS * pCurHcb);
static int int_tul_bad_seq(HCS * pCurHcb);
static int int_tul_resel(HCS * pCurHcb);
static int tul_sync_done(HCS * pCurHcb);
static int wdtr_done(HCS * pCurHcb);
static int wait_tulip(HCS * pCurHcb);
static int tul_wait_done_disc(HCS * pCurHcb);
static int tul_wait_disc(HCS * pCurHcb);
static void tulip_scsi(HCS * pCurHcb);
static int tul_post_scsi_rst(HCS * pCurHcb);

static void tul_se2_ew_en(WORD CurBase);
static void tul_se2_ew_ds(WORD CurBase);
static int tul_se2_rd_all(WORD CurBase);
static void tul_se2_update_all(WORD CurBase);   /* setup default pattern */
static void tul_read_eeprom(WORD CurBase);

                        /* ---- INTERNAL VARIABLES ---- */
static HCS tul_hcs[MAX_SUPPORTED_ADAPTERS];
static INI_ADPT_STRUCT i91u_adpt[MAX_SUPPORTED_ADAPTERS];

/*NVRAM nvram, *nvramp = &nvram; */
static NVRAM i91unvram;
static NVRAM *i91unvramp;



static UCHAR i91udftNvRam[64] =
{
/*----------- header -----------*/
      0x25, 0xc9,       /* Signature    */
      0x40,             /* Size         */
      0x01,             /* Revision     */
      /* -- Host Adapter Structure -- */
      0x95,             /* ModelByte0   */
      0x00,             /* ModelByte1   */
      0x00,             /* ModelInfo    */
      0x01,             /* NumOfCh      */
      NBC1_DEFAULT,           /* BIOSConfig1  */
      0,                /* BIOSConfig2  */
      0,                /* HAConfig1    */
      0,                /* HAConfig2    */
      /* SCSI channel 0 and target Structure  */
      7,                /* SCSIid       */
      NCC1_DEFAULT,           /* SCSIconfig1  */
      0,                /* SCSIconfig2  */
      0x10,             /* NumSCSItarget */

      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,

      /* SCSI channel 1 and target Structure  */
      7,                /* SCSIid       */
      NCC1_DEFAULT,           /* SCSIconfig1  */
      0,                /* SCSIconfig2  */
      0x10,             /* NumSCSItarget */

      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0};                  /*      - CheckSum -            */


static UCHAR tul_rate_tbl[8] =      /* fast 20      */
{
                        /* nanosecond devide by 4 */
      12,               /* 50ns,  20M   */
      18,               /* 75ns,  13.3M */
      25,               /* 100ns, 10M   */
      31,               /* 125ns, 8M    */
      37,               /* 150ns, 6.6M  */
      43,               /* 175ns, 5.7M  */
      50,               /* 200ns, 5M    */
      62                /* 250ns, 4M    */
};

static void tul_do_pause(unsigned amount)
{                       /* Pause for amount jiffies */
      unsigned long the_time = jiffies + amount;

      while (time_before_eq(jiffies, the_time));
}

/*-- forward reference --*/

/*******************************************************************
      Use memeory refresh time        ~ 15us * 2
********************************************************************/
void tul_se2_wait(void)
{
#if 1
      udelay(30);
#else
      UCHAR readByte;

      readByte = TUL_RD(0, 0x61);
      if ((readByte & 0x10) == 0x10) {
            for (;;) {
                  readByte = TUL_RD(0, 0x61);
                  if ((readByte & 0x10) == 0x10)
                        break;
            }
            for (;;) {
                  readByte = TUL_RD(0, 0x61);
                  if ((readByte & 0x10) != 0x10)
                        break;
            }
      } else {
            for (;;) {
                  readByte = TUL_RD(0, 0x61);
                  if ((readByte & 0x10) == 0x10)
                        break;
            }
            for (;;) {
                  readByte = TUL_RD(0, 0x61);
                  if ((readByte & 0x10) != 0x10)
                        break;
            }
      }
#endif
}


/******************************************************************
 Input: instruction for  Serial E2PROM

 EX: se2_rd(0 call se2_instr() to send address and read command

       StartBit  OP_Code   Address                Data
       --------- --------  ------------------     -------
       1         1 , 0     A5,A4,A3,A2,A1,A0      D15-D0

             +-----------------------------------------------------
             |
 CS -----+
                  +--+  +--+  +--+  +--+  +--+
                  ^  |  ^  |  ^  |  ^  |  ^  |
                  |  |  |  |  |  |  |  |  |  |
 CLK -------+  +--+  +--+  +--+  +--+  +--
 (leading edge trigger)

             +--1-----1--+
             | SB    OP  |  OP    A5    A4
 DI  ----+           +--0------------------
 (address and cmd sent to nvram)

       -------------------------------------------+
                                                                        |
 DO                                             +---
 (data sent from nvram)


******************************************************************/
static void tul_se2_instr(WORD CurBase, UCHAR instr)
{
      int i;
      UCHAR b;

      TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2DO);     /* cs+start bit */
      tul_se2_wait();
      TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK | SE2DO);  /* +CLK */
      tul_se2_wait();

      for (i = 0; i < 8; i++) {
            if (instr & 0x80)
                  b = SE2CS | SE2DO;      /* -CLK+dataBit */
            else
                  b = SE2CS;  /* -CLK */
            TUL_WR(CurBase + TUL_NVRAM, b);
            tul_se2_wait();
            TUL_WR(CurBase + TUL_NVRAM, b | SE2CLK);  /* +CLK */
            tul_se2_wait();
            instr <<= 1;
      }
      TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* -CLK */
      tul_se2_wait();
      return;
}


/******************************************************************
 Function name  : tul_se2_ew_en
 Description    : Enable erase/write state of serial EEPROM
******************************************************************/
void tul_se2_ew_en(WORD CurBase)
{
      tul_se2_instr(CurBase, 0x30); /* EWEN */
      TUL_WR(CurBase + TUL_NVRAM, 0);           /* -CS  */
      tul_se2_wait();
      return;
}


/************************************************************************
 Disable erase/write state of serial EEPROM
*************************************************************************/
void tul_se2_ew_ds(WORD CurBase)
{
      tul_se2_instr(CurBase, 0);    /* EWDS */
      TUL_WR(CurBase + TUL_NVRAM, 0);           /* -CS  */
      tul_se2_wait();
      return;
}


/******************************************************************
      Input  :address of Serial E2PROM
      Output :value stored in  Serial E2PROM
*******************************************************************/
static USHORT tul_se2_rd(WORD CurBase, ULONG adr)
{
      UCHAR instr, readByte;
      USHORT readWord;
      int i;

      instr = (UCHAR) (adr | 0x80);
      tul_se2_instr(CurBase, instr);      /* READ INSTR */
      readWord = 0;

      for (i = 15; i >= 0; i--) {
            TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);    /* +CLK */
            tul_se2_wait();
            TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* -CLK */

            /* sample data after the following edge of clock  */
            readByte = TUL_RD(CurBase, TUL_NVRAM);
            readByte &= SE2DI;
            readWord += (readByte << i);
            tul_se2_wait();   /* 6/20/95 */
      }

      TUL_WR(CurBase + TUL_NVRAM, 0);           /* no chip select */
      tul_se2_wait();
      return readWord;
}


/******************************************************************
 Input: new value in  Serial E2PROM, address of Serial E2PROM
*******************************************************************/
static void tul_se2_wr(WORD CurBase, UCHAR adr, USHORT writeWord)
{
      UCHAR readByte;
      UCHAR instr;
      int i;

      instr = (UCHAR) (adr | 0x40);
      tul_se2_instr(CurBase, instr);      /* WRITE INSTR */
      for (i = 15; i >= 0; i--) {
            if (writeWord & 0x8000)
                  TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2DO);     /* -CLK+dataBit 1 */
            else
                  TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* -CLK+dataBit 0 */
            tul_se2_wait();
            TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);    /* +CLK */
            tul_se2_wait();
            writeWord <<= 1;
      }
      TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* -CLK */
      tul_se2_wait();
      TUL_WR(CurBase + TUL_NVRAM, 0);           /* -CS  */
      tul_se2_wait();

      TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* +CS  */
      tul_se2_wait();

      for (;;) {
            TUL_WR(CurBase + TUL_NVRAM, SE2CS | SE2CLK);    /* +CLK */
            tul_se2_wait();
            TUL_WR(CurBase + TUL_NVRAM, SE2CS); /* -CLK */
            tul_se2_wait();
            if ((readByte = TUL_RD(CurBase, TUL_NVRAM)) & SE2DI)
                  break;      /* write complete */
      }
      TUL_WR(CurBase + TUL_NVRAM, 0);           /* -CS */
      return;
}


/***********************************************************************
 Read SCSI H/A configuration parameters from serial EEPROM
************************************************************************/
int tul_se2_rd_all(WORD CurBase)
{
      int i;
      ULONG chksum = 0;
      USHORT *np;

      i91unvramp = &i91unvram;
      np = (USHORT *) i91unvramp;
      for (i = 0; i < 32; i++) {
            *np++ = tul_se2_rd(CurBase, i);
      }

/*--------------------Is signature "ini" ok ? ----------------*/
      if (i91unvramp->NVM_Signature != INI_SIGNATURE)
            return -1;
/*---------------------- Is ckecksum ok ? ----------------------*/
      np = (USHORT *) i91unvramp;
      for (i = 0; i < 31; i++)
            chksum += *np++;
      if (i91unvramp->NVM_CheckSum != (USHORT) chksum)
            return -1;
      return 1;
}


/***********************************************************************
 Update SCSI H/A configuration parameters from serial EEPROM
************************************************************************/
void tul_se2_update_all(WORD CurBase)
{                       /* setup default pattern */
      int i;
      ULONG chksum = 0;
      USHORT *np, *np1;

      i91unvramp = &i91unvram;
      /* Calculate checksum first */
      np = (USHORT *) i91udftNvRam;
      for (i = 0; i < 31; i++)
            chksum += *np++;
      *np = (USHORT) chksum;
      tul_se2_ew_en(CurBase); /* Enable write  */

      np = (USHORT *) i91udftNvRam;
      np1 = (USHORT *) i91unvramp;
      for (i = 0; i < 32; i++, np++, np1++) {
            if (*np != *np1) {
                  tul_se2_wr(CurBase, i, *np);
            }
      }

      tul_se2_ew_ds(CurBase); /* Disable write   */
      return;
}

/*************************************************************************
 Function name  : read_eeprom
**************************************************************************/
void tul_read_eeprom(WORD CurBase)
{
      UCHAR gctrl;

      i91unvramp = &i91unvram;
/*------Enable EEProm programming ---*/
      gctrl = TUL_RD(CurBase, TUL_GCTRL);
      TUL_WR(CurBase + TUL_GCTRL, gctrl | TUL_GCTRL_EEPROM_BIT);
      if (tul_se2_rd_all(CurBase) != 1) {
            tul_se2_update_all(CurBase);  /* setup default pattern */
            tul_se2_rd_all(CurBase);      /* load again  */
      }
/*------ Disable EEProm programming ---*/
      gctrl = TUL_RD(CurBase, TUL_GCTRL);
      TUL_WR(CurBase + TUL_GCTRL, gctrl & ~TUL_GCTRL_EEPROM_BIT);
}                       /* read_eeprom */

static int Addi91u_into_Adapter_table(WORD wBIOS, WORD wBASE, BYTE bInterrupt,
                              BYTE bBus, BYTE bDevice)
{
      int i, j;

      for (i = 0; i < MAX_SUPPORTED_ADAPTERS; i++) {
            if (i91u_adpt[i].ADPT_BIOS < wBIOS)
                  continue;
            if (i91u_adpt[i].ADPT_BIOS == wBIOS) {
                  if (i91u_adpt[i].ADPT_BASE == wBASE) {
                        if (i91u_adpt[i].ADPT_Bus != 0xFF)
                              return 1;
                  } else if (i91u_adpt[i].ADPT_BASE < wBASE)
                              continue;
            }
            for (j = MAX_SUPPORTED_ADAPTERS - 1; j > i; j--) {
                  i91u_adpt[j].ADPT_BASE = i91u_adpt[j - 1].ADPT_BASE;
                  i91u_adpt[j].ADPT_INTR = i91u_adpt[j - 1].ADPT_INTR;
                  i91u_adpt[j].ADPT_BIOS = i91u_adpt[j - 1].ADPT_BIOS;
                  i91u_adpt[j].ADPT_Bus = i91u_adpt[j - 1].ADPT_Bus;
                  i91u_adpt[j].ADPT_Device = i91u_adpt[j - 1].ADPT_Device;
            }
            i91u_adpt[i].ADPT_BASE = wBASE;
            i91u_adpt[i].ADPT_INTR = bInterrupt;
            i91u_adpt[i].ADPT_BIOS = wBIOS;
            i91u_adpt[i].ADPT_Bus = bBus;
            i91u_adpt[i].ADPT_Device = bDevice;
            return 0;
      }
      return 1;
}

static void init_i91uAdapter_table(void)
{
      int i;

      for (i = 0; i < MAX_SUPPORTED_ADAPTERS; i++) {  /* Initialize adapter structure */
            i91u_adpt[i].ADPT_BIOS = 0xffff;
            i91u_adpt[i].ADPT_BASE = 0xffff;
            i91u_adpt[i].ADPT_INTR = 0xff;
            i91u_adpt[i].ADPT_Bus = 0xff;
            i91u_adpt[i].ADPT_Device = 0xff;
      }
      return;
}

static void tul_stop_bm(HCS * pCurHcb)
{

      if (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_ABT | TAX_X_CLR_FIFO);
            /* wait Abort DMA xfer done */
            while ((TUL_RD(pCurHcb->HCS_Base, TUL_Int) & XABT) == 0);
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
}

/***************************************************************************/
static void get_tulipPCIConfig(HCS * pCurHcb, int ch_idx)
{
      pCurHcb->HCS_Base = i91u_adpt[ch_idx].ADPT_BASE;      /* Supply base address  */
      pCurHcb->HCS_BIOS = i91u_adpt[ch_idx].ADPT_BIOS;      /* Supply BIOS address  */
      pCurHcb->HCS_Intr = i91u_adpt[ch_idx].ADPT_INTR;      /* Supply interrupt line */
      return;
}

/***************************************************************************/
static int tul_reset_scsi(HCS * pCurHcb, int seconds)
{
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_RST_BUS);

      while (!((pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt)) & TSS_SCSIRST_INT));
      /* reset tulip chip */

      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, 0);

      /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
      /* SONY 5200 tape drive won't work if only stall for 1 sec */
      tul_do_pause(seconds * HZ);

      TUL_RD(pCurHcb->HCS_Base, TUL_SInt);

      return (SCSI_RESET_SUCCESS);
}

/***************************************************************************/
static int init_tulip(HCS * pCurHcb, SCB * scbp, int tul_num_scb,
                  BYTE * pbBiosAdr, int seconds)
{
      int i;
      BYTE *pwFlags;
      BYTE *pbHeads;
      SCB *pTmpScb, *pPrevScb = NULL;

      pCurHcb->HCS_NumScbs = tul_num_scb;
      pCurHcb->HCS_Semaph = 1;
      spin_lock_init(&pCurHcb->HCS_SemaphLock);
      pCurHcb->HCS_JSStatus0 = 0;
      pCurHcb->HCS_Scb = scbp;
      pCurHcb->HCS_NxtPend = scbp;
      pCurHcb->HCS_NxtAvail = scbp;
      for (i = 0, pTmpScb = scbp; i < tul_num_scb; i++, pTmpScb++) {
            pTmpScb->SCB_TagId = i;
            if (i != 0)
                  pPrevScb->SCB_NxtScb = pTmpScb;
            pPrevScb = pTmpScb;
      }
      pPrevScb->SCB_NxtScb = NULL;
      pCurHcb->HCS_ScbEnd = pTmpScb;
      pCurHcb->HCS_FirstAvail = scbp;
      pCurHcb->HCS_LastAvail = pPrevScb;
      spin_lock_init(&pCurHcb->HCS_AvailLock);
      pCurHcb->HCS_FirstPend = NULL;
      pCurHcb->HCS_LastPend = NULL;
      pCurHcb->HCS_FirstBusy = NULL;
      pCurHcb->HCS_LastBusy = NULL;
      pCurHcb->HCS_FirstDone = NULL;
      pCurHcb->HCS_LastDone = NULL;
      pCurHcb->HCS_ActScb = NULL;
      pCurHcb->HCS_ActTcs = NULL;

      tul_read_eeprom(pCurHcb->HCS_Base);
/*---------- get H/A configuration -------------*/
      if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
            pCurHcb->HCS_MaxTar = 8;
      else
            pCurHcb->HCS_MaxTar = 16;

      pCurHcb->HCS_Config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;

      pCurHcb->HCS_SCSI_ID = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
      pCurHcb->HCS_IdMask = ~(1 << pCurHcb->HCS_SCSI_ID);

#ifdef CHK_PARITY
      /* Enable parity error response */
      TUL_WR(pCurHcb->HCS_Base + TUL_PCMD, TUL_RD(pCurHcb->HCS_Base, TUL_PCMD) | 0x40);
#endif

      /* Mask all the interrupt       */
      TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);

      tul_stop_bm(pCurHcb);
      /* --- Initialize the tulip --- */
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_RST_CHIP);

      /* program HBA's SCSI ID        */
      TUL_WR(pCurHcb->HCS_Base + TUL_SScsiId, pCurHcb->HCS_SCSI_ID << 4);

      /* Enable Initiator Mode ,phase latch,alternate sync period mode,
         disable SCSI reset */
      if (pCurHcb->HCS_Config & HCC_EN_PAR)
            pCurHcb->HCS_SConf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
      else
            pCurHcb->HCS_SConf1 = (TSC_INITDEFAULT);
      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurHcb->HCS_SConf1);

      /* Enable HW reselect           */
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);

      TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, 0);

      /* selection time out = 250 ms */
      TUL_WR(pCurHcb->HCS_Base + TUL_STimeOut, 153);

/*--------- Enable SCSI terminator -----*/
      TUL_WR(pCurHcb->HCS_Base + TUL_XCtrl, (pCurHcb->HCS_Config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)));
      TUL_WR(pCurHcb->HCS_Base + TUL_GCTRL1,
             ((pCurHcb->HCS_Config & HCC_AUTO_TERM) >> 4) | (TUL_RD(pCurHcb->HCS_Base, TUL_GCTRL1) & 0xFE));

      for (i = 0,
           pwFlags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
           pbHeads = pbBiosAdr + 0x180;
           i < pCurHcb->HCS_MaxTar;
           i++, pwFlags++) {
            pCurHcb->HCS_Tcs[i].TCS_Flags = *pwFlags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
            if (pCurHcb->HCS_Tcs[i].TCS_Flags & TCF_EN_255)
                  pCurHcb->HCS_Tcs[i].TCS_DrvFlags = TCF_DRV_255_63;
            else
                  pCurHcb->HCS_Tcs[i].TCS_DrvFlags = 0;
            pCurHcb->HCS_Tcs[i].TCS_JS_Period = 0;
            pCurHcb->HCS_Tcs[i].TCS_SConfig0 = pCurHcb->HCS_SConf1;
            pCurHcb->HCS_Tcs[i].TCS_DrvHead = *pbHeads++;
            if (pCurHcb->HCS_Tcs[i].TCS_DrvHead == 255)
                  pCurHcb->HCS_Tcs[i].TCS_DrvFlags = TCF_DRV_255_63;
            else
                  pCurHcb->HCS_Tcs[i].TCS_DrvFlags = 0;
            pCurHcb->HCS_Tcs[i].TCS_DrvSector = *pbHeads++;
            pCurHcb->HCS_Tcs[i].TCS_Flags &= ~TCF_BUSY;
            pCurHcb->HCS_ActTags[i] = 0;
            pCurHcb->HCS_MaxTags[i] = 0xFF;
      }                 /* for                          */
      printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
             pCurHcb->HCS_Base, pCurHcb->HCS_Intr,
             pCurHcb->HCS_BIOS, pCurHcb->HCS_SCSI_ID);
/*------------------- reset SCSI Bus ---------------------------*/
      if (pCurHcb->HCS_Config & HCC_SCSI_RESET) {
            printk("i91u: Reset SCSI Bus ... \n");
            tul_reset_scsi(pCurHcb, seconds);
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SCFG1, 0x17);
      TUL_WR(pCurHcb->HCS_Base + TUL_SIntEnable, 0xE9);
      return (0);
}

/***************************************************************************/
static SCB *tul_alloc_scb(HCS * hcsp)
{
      SCB *pTmpScb;
      ULONG flags;
      spin_lock_irqsave(&(hcsp->HCS_AvailLock), flags);
      if ((pTmpScb = hcsp->HCS_FirstAvail) != NULL) {
#if DEBUG_QUEUE
            printk("find scb at %08lx\n", (ULONG) pTmpScb);
#endif
            if ((hcsp->HCS_FirstAvail = pTmpScb->SCB_NxtScb) == NULL)
                  hcsp->HCS_LastAvail = NULL;
            pTmpScb->SCB_NxtScb = NULL;
            pTmpScb->SCB_Status = SCB_RENT;
      }
      spin_unlock_irqrestore(&(hcsp->HCS_AvailLock), flags);
      return (pTmpScb);
}

/***************************************************************************/
static void tul_release_scb(HCS * hcsp, SCB * scbp)
{
      ULONG flags;

#if DEBUG_QUEUE
      printk("Release SCB %lx; ", (ULONG) scbp);
#endif
      spin_lock_irqsave(&(hcsp->HCS_AvailLock), flags);
      scbp->SCB_Srb = NULL;
      scbp->SCB_Status = 0;
      scbp->SCB_NxtScb = NULL;
      if (hcsp->HCS_LastAvail != NULL) {
            hcsp->HCS_LastAvail->SCB_NxtScb = scbp;
            hcsp->HCS_LastAvail = scbp;
      } else {
            hcsp->HCS_FirstAvail = scbp;
            hcsp->HCS_LastAvail = scbp;
      }
      spin_unlock_irqrestore(&(hcsp->HCS_AvailLock), flags);
}

/***************************************************************************/
static void tul_append_pend_scb(HCS * pCurHcb, SCB * scbp)
{

#if DEBUG_QUEUE
      printk("Append pend SCB %lx; ", (ULONG) scbp);
#endif
      scbp->SCB_Status = SCB_PEND;
      scbp->SCB_NxtScb = NULL;
      if (pCurHcb->HCS_LastPend != NULL) {
            pCurHcb->HCS_LastPend->SCB_NxtScb = scbp;
            pCurHcb->HCS_LastPend = scbp;
      } else {
            pCurHcb->HCS_FirstPend = scbp;
            pCurHcb->HCS_LastPend = scbp;
      }
}

/***************************************************************************/
static void tul_push_pend_scb(HCS * pCurHcb, SCB * scbp)
{

#if DEBUG_QUEUE
      printk("Push pend SCB %lx; ", (ULONG) scbp);
#endif
      scbp->SCB_Status = SCB_PEND;
      if ((scbp->SCB_NxtScb = pCurHcb->HCS_FirstPend) != NULL) {
            pCurHcb->HCS_FirstPend = scbp;
      } else {
            pCurHcb->HCS_FirstPend = scbp;
            pCurHcb->HCS_LastPend = scbp;
      }
}

/***************************************************************************/
static SCB *tul_find_first_pend_scb(HCS * pCurHcb)
{
      SCB *pFirstPend;


      pFirstPend = pCurHcb->HCS_FirstPend;
      while (pFirstPend != NULL) {
            if (pFirstPend->SCB_Opcode != ExecSCSI) {
                  return (pFirstPend);
            }
            if (pFirstPend->SCB_TagMsg == 0) {
                  if ((pCurHcb->HCS_ActTags[pFirstPend->SCB_Target] == 0) &&
                      !(pCurHcb->HCS_Tcs[pFirstPend->SCB_Target].TCS_Flags & TCF_BUSY)) {
                        return (pFirstPend);
                  }
            } else {
                  if ((pCurHcb->HCS_ActTags[pFirstPend->SCB_Target] >=
                    pCurHcb->HCS_MaxTags[pFirstPend->SCB_Target]) |
                      (pCurHcb->HCS_Tcs[pFirstPend->SCB_Target].TCS_Flags & TCF_BUSY)) {
                        pFirstPend = pFirstPend->SCB_NxtScb;
                        continue;
                  }
                  return (pFirstPend);
            }
            pFirstPend = pFirstPend->SCB_NxtScb;
      }


      return (pFirstPend);
}
/***************************************************************************/
static void tul_unlink_pend_scb(HCS * pCurHcb, SCB * pCurScb)
{
      SCB *pTmpScb, *pPrevScb;

#if DEBUG_QUEUE
      printk("unlink pend SCB %lx; ", (ULONG) pCurScb);
#endif

      pPrevScb = pTmpScb = pCurHcb->HCS_FirstPend;
      while (pTmpScb != NULL) {
            if (pCurScb == pTmpScb) {     /* Unlink this SCB              */
                  if (pTmpScb == pCurHcb->HCS_FirstPend) {
                        if ((pCurHcb->HCS_FirstPend = pTmpScb->SCB_NxtScb) == NULL)
                              pCurHcb->HCS_LastPend = NULL;
                  } else {
                        pPrevScb->SCB_NxtScb = pTmpScb->SCB_NxtScb;
                        if (pTmpScb == pCurHcb->HCS_LastPend)
                              pCurHcb->HCS_LastPend = pPrevScb;
                  }
                  pTmpScb->SCB_NxtScb = NULL;
                  break;
            }
            pPrevScb = pTmpScb;
            pTmpScb = pTmpScb->SCB_NxtScb;
      }
      return;
}
/***************************************************************************/
static void tul_append_busy_scb(HCS * pCurHcb, SCB * scbp)
{

#if DEBUG_QUEUE
      printk("append busy SCB %lx; ", (ULONG) scbp);
#endif
      if (scbp->SCB_TagMsg)
            pCurHcb->HCS_ActTags[scbp->SCB_Target]++;
      else
            pCurHcb->HCS_Tcs[scbp->SCB_Target].TCS_Flags |= TCF_BUSY;
      scbp->SCB_Status = SCB_BUSY;
      scbp->SCB_NxtScb = NULL;
      if (pCurHcb->HCS_LastBusy != NULL) {
            pCurHcb->HCS_LastBusy->SCB_NxtScb = scbp;
            pCurHcb->HCS_LastBusy = scbp;
      } else {
            pCurHcb->HCS_FirstBusy = scbp;
            pCurHcb->HCS_LastBusy = scbp;
      }
}

/***************************************************************************/
static SCB *tul_pop_busy_scb(HCS * pCurHcb)
{
      SCB *pTmpScb;


      if ((pTmpScb = pCurHcb->HCS_FirstBusy) != NULL) {
            if ((pCurHcb->HCS_FirstBusy = pTmpScb->SCB_NxtScb) == NULL)
                  pCurHcb->HCS_LastBusy = NULL;
            pTmpScb->SCB_NxtScb = NULL;
            if (pTmpScb->SCB_TagMsg)
                  pCurHcb->HCS_ActTags[pTmpScb->SCB_Target]--;
            else
                  pCurHcb->HCS_Tcs[pTmpScb->SCB_Target].TCS_Flags &= ~TCF_BUSY;
      }
#if DEBUG_QUEUE
      printk("Pop busy SCB %lx; ", (ULONG) pTmpScb);
#endif
      return (pTmpScb);
}

/***************************************************************************/
static void tul_unlink_busy_scb(HCS * pCurHcb, SCB * pCurScb)
{
      SCB *pTmpScb, *pPrevScb;

#if DEBUG_QUEUE
      printk("unlink busy SCB %lx; ", (ULONG) pCurScb);
#endif

      pPrevScb = pTmpScb = pCurHcb->HCS_FirstBusy;
      while (pTmpScb != NULL) {
            if (pCurScb == pTmpScb) {     /* Unlink this SCB              */
                  if (pTmpScb == pCurHcb->HCS_FirstBusy) {
                        if ((pCurHcb->HCS_FirstBusy = pTmpScb->SCB_NxtScb) == NULL)
                              pCurHcb->HCS_LastBusy = NULL;
                  } else {
                        pPrevScb->SCB_NxtScb = pTmpScb->SCB_NxtScb;
                        if (pTmpScb == pCurHcb->HCS_LastBusy)
                              pCurHcb->HCS_LastBusy = pPrevScb;
                  }
                  pTmpScb->SCB_NxtScb = NULL;
                  if (pTmpScb->SCB_TagMsg)
                        pCurHcb->HCS_ActTags[pTmpScb->SCB_Target]--;
                  else
                        pCurHcb->HCS_Tcs[pTmpScb->SCB_Target].TCS_Flags &= ~TCF_BUSY;
                  break;
            }
            pPrevScb = pTmpScb;
            pTmpScb = pTmpScb->SCB_NxtScb;
      }
      return;
}

/***************************************************************************/
SCB *tul_find_busy_scb(HCS * pCurHcb, WORD tarlun)
{
      SCB *pTmpScb, *pPrevScb;
      WORD scbp_tarlun;


      pPrevScb = pTmpScb = pCurHcb->HCS_FirstBusy;
      while (pTmpScb != NULL) {
            scbp_tarlun = (pTmpScb->SCB_Lun << 8) | (pTmpScb->SCB_Target);
            if (scbp_tarlun == tarlun) {  /* Unlink this SCB              */
                  break;
            }
            pPrevScb = pTmpScb;
            pTmpScb = pTmpScb->SCB_NxtScb;
      }
#if DEBUG_QUEUE
      printk("find busy SCB %lx; ", (ULONG) pTmpScb);
#endif
      return (pTmpScb);
}

/***************************************************************************/
static void tul_append_done_scb(HCS * pCurHcb, SCB * scbp)
{

#if DEBUG_QUEUE
      printk("append done SCB %lx; ", (ULONG) scbp);
#endif

      scbp->SCB_Status = SCB_DONE;
      scbp->SCB_NxtScb = NULL;
      if (pCurHcb->HCS_LastDone != NULL) {
            pCurHcb->HCS_LastDone->SCB_NxtScb = scbp;
            pCurHcb->HCS_LastDone = scbp;
      } else {
            pCurHcb->HCS_FirstDone = scbp;
            pCurHcb->HCS_LastDone = scbp;
      }
}

/***************************************************************************/
SCB *tul_find_done_scb(HCS * pCurHcb)
{
      SCB *pTmpScb;


      if ((pTmpScb = pCurHcb->HCS_FirstDone) != NULL) {
            if ((pCurHcb->HCS_FirstDone = pTmpScb->SCB_NxtScb) == NULL)
                  pCurHcb->HCS_LastDone = NULL;
            pTmpScb->SCB_NxtScb = NULL;
      }
#if DEBUG_QUEUE
      printk("find done SCB %lx; ", (ULONG) pTmpScb);
#endif
      return (pTmpScb);
}

/***************************************************************************/
static int tul_abort_srb(HCS * pCurHcb, struct scsi_cmnd *srbp)
{
      ULONG flags;
      SCB *pTmpScb, *pPrevScb;

      spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

      if ((pCurHcb->HCS_Semaph == 0) && (pCurHcb->HCS_ActScb == NULL)) {
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
            /* disable Jasmin SCSI Int        */

                spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

            tulip_main(pCurHcb);

            spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

            pCurHcb->HCS_Semaph = 1;
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);

            spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

            return SCSI_ABORT_SNOOZE;
      }
      pPrevScb = pTmpScb = pCurHcb->HCS_FirstPend;    /* Check Pend queue */
      while (pTmpScb != NULL) {
            /* 07/27/98 */
            if (pTmpScb->SCB_Srb == srbp) {
                  if (pTmpScb == pCurHcb->HCS_ActScb) {
                        spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                        return SCSI_ABORT_BUSY;
                  } else if (pTmpScb == pCurHcb->HCS_FirstPend) {
                        if ((pCurHcb->HCS_FirstPend = pTmpScb->SCB_NxtScb) == NULL)
                              pCurHcb->HCS_LastPend = NULL;
                  } else {
                        pPrevScb->SCB_NxtScb = pTmpScb->SCB_NxtScb;
                        if (pTmpScb == pCurHcb->HCS_LastPend)
                              pCurHcb->HCS_LastPend = pPrevScb;
                  }
                  pTmpScb->SCB_HaStat = HOST_ABORTED;
                  pTmpScb->SCB_Flags |= SCF_DONE;
                  if (pTmpScb->SCB_Flags & SCF_POST)
                        (*pTmpScb->SCB_Post) ((BYTE *) pCurHcb, (BYTE *) pTmpScb);
                  spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                  return SCSI_ABORT_SUCCESS;
            }
            pPrevScb = pTmpScb;
            pTmpScb = pTmpScb->SCB_NxtScb;
      }

      pPrevScb = pTmpScb = pCurHcb->HCS_FirstBusy;    /* Check Busy queue */
      while (pTmpScb != NULL) {

            if (pTmpScb->SCB_Srb == srbp) {

                  if (pTmpScb == pCurHcb->HCS_ActScb) {
                        spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                        return SCSI_ABORT_BUSY;
                  } else if (pTmpScb->SCB_TagMsg == 0) {
                        spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                        return SCSI_ABORT_BUSY;
                  } else {
                        pCurHcb->HCS_ActTags[pTmpScb->SCB_Target]--;
                        if (pTmpScb == pCurHcb->HCS_FirstBusy) {
                              if ((pCurHcb->HCS_FirstBusy = pTmpScb->SCB_NxtScb) == NULL)
                                    pCurHcb->HCS_LastBusy = NULL;
                        } else {
                              pPrevScb->SCB_NxtScb = pTmpScb->SCB_NxtScb;
                              if (pTmpScb == pCurHcb->HCS_LastBusy)
                                    pCurHcb->HCS_LastBusy = pPrevScb;
                        }
                        pTmpScb->SCB_NxtScb = NULL;


                        pTmpScb->SCB_HaStat = HOST_ABORTED;
                        pTmpScb->SCB_Flags |= SCF_DONE;
                        if (pTmpScb->SCB_Flags & SCF_POST)
                              (*pTmpScb->SCB_Post) ((BYTE *) pCurHcb, (BYTE *) pTmpScb);
                        spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                        return SCSI_ABORT_SUCCESS;
                  }
            }
            pPrevScb = pTmpScb;
            pTmpScb = pTmpScb->SCB_NxtScb;
      }
      spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
      return (SCSI_ABORT_NOT_RUNNING);
}

/***************************************************************************/
static int tul_bad_seq(HCS * pCurHcb)
{
      SCB *pCurScb;

      printk("tul_bad_seg c=%d\n", pCurHcb->HCS_Index);

      if ((pCurScb = pCurHcb->HCS_ActScb) != NULL) {
            tul_unlink_busy_scb(pCurHcb, pCurScb);
            pCurScb->SCB_HaStat = HOST_BAD_PHAS;
            pCurScb->SCB_TaStat = 0;
            tul_append_done_scb(pCurHcb, pCurScb);
      }
      tul_stop_bm(pCurHcb);

      tul_reset_scsi(pCurHcb, 8);   /* 7/29/98 */

      return (tul_post_scsi_rst(pCurHcb));
}

#if 0

/************************************************************************/
static int tul_device_reset(HCS * pCurHcb, struct scsi_cmnd *pSrb,
                      unsigned int target, unsigned int ResetFlags)
{
      ULONG flags;
      SCB *pScb;
      spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

      if (ResetFlags & SCSI_RESET_ASYNCHRONOUS) {

            if ((pCurHcb->HCS_Semaph == 0) && (pCurHcb->HCS_ActScb == NULL)) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
                  /* disable Jasmin SCSI Int        */

                  spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

                  tulip_main(pCurHcb);

                  spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

                  pCurHcb->HCS_Semaph = 1;
                  TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);

                  spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

                  return SCSI_RESET_SNOOZE;
            }
            pScb = pCurHcb->HCS_FirstBusy;      /* Check Busy queue */
            while (pScb != NULL) {
                  if (pScb->SCB_Srb == pSrb)
                        break;
                  pScb = pScb->SCB_NxtScb;
            }
            if (pScb == NULL) {
                  printk("Unable to Reset - No SCB Found\n");

                  spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
                  return SCSI_RESET_NOT_RUNNING;
            }
      }
      if ((pScb = tul_alloc_scb(pCurHcb)) == NULL) {
            spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
            return SCSI_RESET_NOT_RUNNING;
      }
      pScb->SCB_Opcode = BusDevRst;
      pScb->SCB_Flags = SCF_POST;
      pScb->SCB_Target = target;
      pScb->SCB_Mode = 0;

      pScb->SCB_Srb = NULL;
      if (ResetFlags & SCSI_RESET_SYNCHRONOUS) {
            pScb->SCB_Srb = pSrb;
      }
      tul_push_pend_scb(pCurHcb, pScb);   /* push this SCB to Pending queue */

      if (pCurHcb->HCS_Semaph == 1) {
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
            /* disable Jasmin SCSI Int        */
            pCurHcb->HCS_Semaph = 0;

            spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

            tulip_main(pCurHcb);

                spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

            pCurHcb->HCS_Semaph = 1;
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);
      }
      spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
      return SCSI_RESET_PENDING;
}

static int tul_reset_scsi_bus(HCS * pCurHcb)
{
      ULONG flags;

      spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);
      TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
      pCurHcb->HCS_Semaph = 0;

      spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

      tul_stop_bm(pCurHcb);

      tul_reset_scsi(pCurHcb, 2);   /* 7/29/98 */

      spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);
      tul_post_scsi_rst(pCurHcb);

        spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

      tulip_main(pCurHcb);

        spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

      pCurHcb->HCS_Semaph = 1;
      TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);
      spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
      return (SCSI_RESET_SUCCESS | SCSI_RESET_HOST_RESET);
}

#endif  /*  0  */

/************************************************************************/
static void tul_exec_scb(HCS * pCurHcb, SCB * pCurScb)
{
      ULONG flags;

      pCurScb->SCB_Mode = 0;

      pCurScb->SCB_SGIdx = 0;
      pCurScb->SCB_SGMax = pCurScb->SCB_SGLen;

      spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

      tul_append_pend_scb(pCurHcb, pCurScb);    /* Append this SCB to Pending queue */

/* VVVVV 07/21/98 */
      if (pCurHcb->HCS_Semaph == 1) {
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
            /* disable Jasmin SCSI Int        */
            pCurHcb->HCS_Semaph = 0;

            spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);

            tulip_main(pCurHcb);

            spin_lock_irqsave(&(pCurHcb->HCS_SemaphLock), flags);

            pCurHcb->HCS_Semaph = 1;
            TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);
      }
      spin_unlock_irqrestore(&(pCurHcb->HCS_SemaphLock), flags);
      return;
}

/***************************************************************************/
static int tul_isr(HCS * pCurHcb)
{
      /* Enter critical section       */

      if (TUL_RD(pCurHcb->HCS_Base, TUL_Int) & TSS_INT_PENDING) {
            if (pCurHcb->HCS_Semaph == 1) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x1F);
                  /* Disable Tulip SCSI Int */
                  pCurHcb->HCS_Semaph = 0;

                  tulip_main(pCurHcb);

                  pCurHcb->HCS_Semaph = 1;
                  TUL_WR(pCurHcb->HCS_Base + TUL_Mask, 0x0F);
                  return (1);
            }
      }
      return (0);
}

/***************************************************************************/
int tulip_main(HCS * pCurHcb)
{
      SCB *pCurScb;

      for (;;) {

            tulip_scsi(pCurHcb);    /* Call tulip_scsi              */

            while ((pCurScb = tul_find_done_scb(pCurHcb)) != NULL) {    /* find done entry */
                  if (pCurScb->SCB_TaStat == INI_QUEUE_FULL) {
                        pCurHcb->HCS_MaxTags[pCurScb->SCB_Target] =
                            pCurHcb->HCS_ActTags[pCurScb->SCB_Target] - 1;
                        pCurScb->SCB_TaStat = 0;
                        tul_append_pend_scb(pCurHcb, pCurScb);
                        continue;
                  }
                  if (!(pCurScb->SCB_Mode & SCM_RSENS)) {         /* not in auto req. sense mode */
                        if (pCurScb->SCB_TaStat == 2) {

                              /* clr sync. nego flag */

                              if (pCurScb->SCB_Flags & SCF_SENSE) {
                                    BYTE len;
                                    len = pCurScb->SCB_SenseLen;
                                    if (len == 0)
                                          len = 1;
                                    pCurScb->SCB_BufLen = pCurScb->SCB_SenseLen;
                                    pCurScb->SCB_BufPtr = pCurScb->SCB_SensePtr;
                                    pCurScb->SCB_Flags &= ~(SCF_SG | SCF_DIR);      /* for xfer_data_in */
/*                      pCurScb->SCB_Flags |= SCF_NO_DCHK;      */
                                    /* so, we won't report worng direction in xfer_data_in,
                                       and won't report HOST_DO_DU in state_6 */
                                    pCurScb->SCB_Mode = SCM_RSENS;
                                    pCurScb->SCB_Ident &= 0xBF;   /* Disable Disconnect */
                                    pCurScb->SCB_TagMsg = 0;
                                    pCurScb->SCB_TaStat = 0;
                                    pCurScb->SCB_CDBLen = 6;
                                    pCurScb->SCB_CDB[0] = SCSICMD_RequestSense;
                                    pCurScb->SCB_CDB[1] = 0;
                                    pCurScb->SCB_CDB[2] = 0;
                                    pCurScb->SCB_CDB[3] = 0;
                                    pCurScb->SCB_CDB[4] = len;
                                    pCurScb->SCB_CDB[5] = 0;
                                    tul_push_pend_scb(pCurHcb, pCurScb);
                                    break;
                              }
                        }
                  } else {    /* in request sense mode */

                        if (pCurScb->SCB_TaStat == 2) {           /* check contition status again after sending
                                                         requset sense cmd 0x3 */
                              pCurScb->SCB_HaStat = HOST_BAD_PHAS;
                        }
                        pCurScb->SCB_TaStat = 2;
                  }
                  pCurScb->SCB_Flags |= SCF_DONE;
                  if (pCurScb->SCB_Flags & SCF_POST) {
                        (*pCurScb->SCB_Post) ((BYTE *) pCurHcb, (BYTE *) pCurScb);
                  }
            }           /* while */

            /* find_active: */
            if (TUL_RD(pCurHcb->HCS_Base, TUL_SStatus0) & TSS_INT_PENDING)
                  continue;

            if (pCurHcb->HCS_ActScb) {    /* return to OS and wait for xfer_done_ISR/Selected_ISR */
                  return 1;   /* return to OS, enable interrupt */
            }
            /* Check pending SCB            */
            if (tul_find_first_pend_scb(pCurHcb) == NULL) {
                  return 1;   /* return to OS, enable interrupt */
            }
      }                 /* End of for loop */
      /* statement won't reach here */
}




/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/
/***************************************************************************/

/***************************************************************************/
void tulip_scsi(HCS * pCurHcb)
{
      SCB *pCurScb;
      TCS *pCurTcb;

      /* make sure to service interrupt asap */

      if ((pCurHcb->HCS_JSStatus0 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus0)) & TSS_INT_PENDING) {

            pCurHcb->HCS_Phase = pCurHcb->HCS_JSStatus0 & TSS_PH_MASK;
            pCurHcb->HCS_JSStatus1 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus1);
            pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt);
            if (pCurHcb->HCS_JSInt & TSS_SCSIRST_INT) {     /* SCSI bus reset detected      */
                  int_tul_scsi_rst(pCurHcb);
                  return;
            }
            if (pCurHcb->HCS_JSInt & TSS_RESEL_INT) { /* if selected/reselected interrupt */
                  if (int_tul_resel(pCurHcb) == 0)
                        tul_next_state(pCurHcb);
                  return;
            }
            if (pCurHcb->HCS_JSInt & TSS_SEL_TIMEOUT) {
                  int_tul_busfree(pCurHcb);
                  return;
            }
            if (pCurHcb->HCS_JSInt & TSS_DISC_INT) {  /* BUS disconnection            */
                  int_tul_busfree(pCurHcb);     /* unexpected bus free or sel timeout */
                  return;
            }
            if (pCurHcb->HCS_JSInt & (TSS_FUNC_COMP | TSS_BUS_SERV)) {  /* func complete or Bus service */
                  if ((pCurScb = pCurHcb->HCS_ActScb) != NULL)
                        tul_next_state(pCurHcb);
                  return;
            }
      }
      if (pCurHcb->HCS_ActScb != NULL)
            return;

      if ((pCurScb = tul_find_first_pend_scb(pCurHcb)) == NULL)
            return;

      /* program HBA's SCSI ID & target SCSI ID */
      TUL_WR(pCurHcb->HCS_Base + TUL_SScsiId,
           (pCurHcb->HCS_SCSI_ID << 4) | (pCurScb->SCB_Target & 0x0F));
      if (pCurScb->SCB_Opcode == ExecSCSI) {
            pCurTcb = &pCurHcb->HCS_Tcs[pCurScb->SCB_Target];

            if (pCurScb->SCB_TagMsg)
                  pCurTcb->TCS_DrvFlags |= TCF_DRV_EN_TAG;
            else
                  pCurTcb->TCS_DrvFlags &= ~TCF_DRV_EN_TAG;

            TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, pCurTcb->TCS_JS_Period);
            if ((pCurTcb->TCS_Flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {  /* do wdtr negotiation          */
                  tul_select_atn_stop(pCurHcb, pCurScb);
            } else {
                  if ((pCurTcb->TCS_Flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {   /* do sync negotiation          */
                        tul_select_atn_stop(pCurHcb, pCurScb);
                  } else {
                        if (pCurScb->SCB_TagMsg)
                              tul_select_atn3(pCurHcb, pCurScb);
                        else
                              tul_select_atn(pCurHcb, pCurScb);
                  }
            }
            if (pCurScb->SCB_Flags & SCF_POLL) {
                  while (wait_tulip(pCurHcb) != -1) {
                        if (tul_next_state(pCurHcb) == -1)
                              break;
                  }
            }
      } else if (pCurScb->SCB_Opcode == BusDevRst) {
            tul_select_atn_stop(pCurHcb, pCurScb);
            pCurScb->SCB_NxtStat = 8;
            if (pCurScb->SCB_Flags & SCF_POLL) {
                  while (wait_tulip(pCurHcb) != -1) {
                        if (tul_next_state(pCurHcb) == -1)
                              break;
                  }
            }
      } else if (pCurScb->SCB_Opcode == AbortCmd) {
            if (tul_abort_srb(pCurHcb, pCurScb->SCB_Srb) != 0) {


                  tul_unlink_pend_scb(pCurHcb, pCurScb);

                  tul_release_scb(pCurHcb, pCurScb);
            } else {
                  pCurScb->SCB_Opcode = BusDevRst;
                  tul_select_atn_stop(pCurHcb, pCurScb);
                  pCurScb->SCB_NxtStat = 8;
            }

/* 08/03/98 */
      } else {
            tul_unlink_pend_scb(pCurHcb, pCurScb);
            pCurScb->SCB_HaStat = 0x16;   /* bad command */
            tul_append_done_scb(pCurHcb, pCurScb);
      }
      return;
}


/***************************************************************************/
int tul_next_state(HCS * pCurHcb)
{
      int next;

      next = pCurHcb->HCS_ActScb->SCB_NxtStat;
      for (;;) {
            switch (next) {
            case 1:
                  next = tul_state_1(pCurHcb);
                  break;
            case 2:
                  next = tul_state_2(pCurHcb);
                  break;
            case 3:
                  next = tul_state_3(pCurHcb);
                  break;
            case 4:
                  next = tul_state_4(pCurHcb);
                  break;
            case 5:
                  next = tul_state_5(pCurHcb);
                  break;
            case 6:
                  next = tul_state_6(pCurHcb);
                  break;
            case 7:
                  next = tul_state_7(pCurHcb);
                  break;
            case 8:
                  return (tul_bus_device_reset(pCurHcb));
            default:
                  return (tul_bad_seq(pCurHcb));
            }
            if (next <= 0)
                  return next;
      }
}


/***************************************************************************/
/* sTate after selection with attention & stop */
int tul_state_1(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;
#if DEBUG_STATE
      printk("-s1-");
#endif

      tul_unlink_pend_scb(pCurHcb, pCurScb);
      tul_append_busy_scb(pCurHcb, pCurScb);

      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurTcb->TCS_SConfig0);
      /* ATN on */
      if (pCurHcb->HCS_Phase == MSG_OUT) {

            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, (TSC_EN_BUS_IN | TSC_HW_RESELECT));

            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_Ident);

            if (pCurScb->SCB_TagMsg) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_TagMsg);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_TagId);
            }
            if ((pCurTcb->TCS_Flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {

                  pCurTcb->TCS_Flags |= TCF_WDTR_DONE;

                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_EXTEND);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 2); /* Extended msg length */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 3); /* Sync request */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 1); /* Start from 16 bits */
            } else if ((pCurTcb->TCS_Flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {

                  pCurTcb->TCS_Flags |= TCF_SYNC_DONE;

                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_EXTEND);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 3); /* extended msg length */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 1); /* sync request */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, tul_rate_tbl[pCurTcb->TCS_Flags & TCF_SCSI_RATE]);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MAX_OFFSET);    /* REQ/ACK offset */
            }
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
            if (wait_tulip(pCurHcb) == -1)
                  return (-1);
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, (TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)));
      return (3);
}


/***************************************************************************/
/* state after selection with attention */
/* state after selection with attention3 */
int tul_state_2(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;
#if DEBUG_STATE
      printk("-s2-");
#endif

      tul_unlink_pend_scb(pCurHcb, pCurScb);
      tul_append_busy_scb(pCurHcb, pCurScb);

      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurTcb->TCS_SConfig0);

      if (pCurHcb->HCS_JSStatus1 & TSS_CMD_PH_CMP) {
            return (4);
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, (TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)));
      return (3);
}

/***************************************************************************/
/* state before CDB xfer is done */
int tul_state_3(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;
      int i;

#if DEBUG_STATE
      printk("-s3-");
#endif
      for (;;) {
            switch (pCurHcb->HCS_Phase) {
            case CMD_OUT:     /* Command out phase            */
                  for (i = 0; i < (int) pCurScb->SCB_CDBLen; i++)
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_CDB[i]);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                  if (wait_tulip(pCurHcb) == -1)
                        return (-1);
                  if (pCurHcb->HCS_Phase == CMD_OUT) {
                        return (tul_bad_seq(pCurHcb));
                  }
                  return (4);

            case MSG_IN:      /* Message in phase             */
                  pCurScb->SCB_NxtStat = 3;
                  if (tul_msgin(pCurHcb) == -1)
                        return (-1);
                  break;

            case STATUS_IN:   /* Status phase                 */
                  if (tul_status_msg(pCurHcb) == -1)
                        return (-1);
                  break;

            case MSG_OUT:     /* Message out phase            */
                  if (pCurTcb->TCS_Flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {

                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_NOP);       /* msg nop */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                        if (wait_tulip(pCurHcb) == -1)
                              return (-1);

                  } else {
                        pCurTcb->TCS_Flags |= TCF_SYNC_DONE;

                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_EXTEND);
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 3); /* ext. msg len */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 1); /* sync request */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, tul_rate_tbl[pCurTcb->TCS_Flags & TCF_SCSI_RATE]);
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MAX_OFFSET);    /* REQ/ACK offset */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                        if (wait_tulip(pCurHcb) == -1)
                              return (-1);
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
                        TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7));

                  }
                  break;

            default:
                  return (tul_bad_seq(pCurHcb));
            }
      }
}


/***************************************************************************/
int tul_state_4(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;

#if DEBUG_STATE
      printk("-s4-");
#endif
      if ((pCurScb->SCB_Flags & SCF_DIR) == SCF_NO_XF) {
            return (6); /* Go to state 6                */
      }
      for (;;) {
            if (pCurScb->SCB_BufLen == 0)
                  return (6); /* Go to state 6                */

            switch (pCurHcb->HCS_Phase) {

            case STATUS_IN:   /* Status phase                 */
                  if ((pCurScb->SCB_Flags & SCF_DIR) != 0) {      /* if direction bit set then report data underrun */
                        pCurScb->SCB_HaStat = HOST_DO_DU;
                  }
                  if ((tul_status_msg(pCurHcb)) == -1)
                        return (-1);
                  break;

            case MSG_IN:      /* Message in phase             */
                  pCurScb->SCB_NxtStat = 0x4;
                  if (tul_msgin(pCurHcb) == -1)
                        return (-1);
                  break;

            case MSG_OUT:     /* Message out phase            */
                  if (pCurHcb->HCS_JSStatus0 & TSS_PAR_ERROR) {
                        pCurScb->SCB_BufLen = 0;
                        pCurScb->SCB_HaStat = HOST_DO_DU;
                        if (tul_msgout_ide(pCurHcb) == -1)
                              return (-1);
                        return (6); /* Go to state 6                */
                  } else {
                        TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_NOP);       /* msg nop */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                        if (wait_tulip(pCurHcb) == -1)
                              return (-1);
                  }
                  break;

            case DATA_IN:     /* Data in phase                */
                  return (tul_xfer_data_in(pCurHcb));

            case DATA_OUT:    /* Data out phase               */
                  return (tul_xfer_data_out(pCurHcb));

            default:
                  return (tul_bad_seq(pCurHcb));
            }
      }
}


/***************************************************************************/
/* state after dma xfer done or phase change before xfer done */
int tul_state_5(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      long cnt, xcnt;         /* cannot use unsigned !! code: if (xcnt < 0) */

#if DEBUG_STATE
      printk("-s5-");
#endif
/*------ get remaining count -------*/

      cnt = TUL_RDLONG(pCurHcb->HCS_Base, TUL_SCnt0) & 0x0FFFFFF;

      if (TUL_RD(pCurHcb->HCS_Base, TUL_XCmd) & 0x20) {
            /* ----------------------- DATA_IN ----------------------------- */
            /* check scsi parity error */
            if (pCurHcb->HCS_JSStatus0 & TSS_PAR_ERROR) {
                  pCurScb->SCB_HaStat = HOST_DO_DU;
            }
            if (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP  */
                  /* tell Hardware  scsi xfer has been terminated */
                  TUL_WR(pCurHcb->HCS_Base + TUL_XCtrl, TUL_RD(pCurHcb->HCS_Base, TUL_XCtrl) | 0x80);
                  /* wait until DMA xfer not pending */
                  while (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & XPEND);
            }
      } else {
/*-------- DATA OUT -----------*/
            if ((TUL_RD(pCurHcb->HCS_Base, TUL_SStatus1) & TSS_XFER_CMP) == 0) {
                  if (pCurHcb->HCS_ActTcs->TCS_JS_Period & TSC_WIDE_SCSI)
                        cnt += (TUL_RD(pCurHcb->HCS_Base, TUL_SFifoCnt) & 0x1F) << 1;
                  else
                        cnt += (TUL_RD(pCurHcb->HCS_Base, TUL_SFifoCnt) & 0x1F);
            }
            if (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
                  TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_ABT);
                  /* wait Abort DMA xfer done */
                  while ((TUL_RD(pCurHcb->HCS_Base, TUL_Int) & XABT) == 0);
            }
            if ((cnt == 1) && (pCurHcb->HCS_Phase == DATA_OUT)) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                  if (wait_tulip(pCurHcb) == -1) {
                        return (-1);
                  }
                  cnt = 0;
            } else {
                  if ((TUL_RD(pCurHcb->HCS_Base, TUL_SStatus1) & TSS_XFER_CMP) == 0)
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
            }
      }

      if (cnt == 0) {
            pCurScb->SCB_BufLen = 0;
            return (6); /* Go to state 6                */
      }
      /* Update active data pointer */
      xcnt = (long) pCurScb->SCB_BufLen - cnt;  /* xcnt== bytes already xferred */
      pCurScb->SCB_BufLen = (U32) cnt;    /* cnt == bytes left to be xferred */
      if (pCurScb->SCB_Flags & SCF_SG) {
            register SG *sgp;
            ULONG i;

            sgp = &pCurScb->SCB_SGList[pCurScb->SCB_SGIdx];
            for (i = pCurScb->SCB_SGIdx; i < pCurScb->SCB_SGMax; sgp++, i++) {
                  xcnt -= (long) sgp->SG_Len;
                  if (xcnt < 0) {         /* this sgp xfer half done */
                        xcnt += (long) sgp->SG_Len;   /* xcnt == bytes xferred in this sgp */
                        sgp->SG_Ptr += (U32) xcnt;    /* new ptr to be xfer */
                        sgp->SG_Len -= (U32) xcnt;    /* new len to be xfer */
                        pCurScb->SCB_BufPtr += ((U32) (i - pCurScb->SCB_SGIdx) << 3);
                        /* new SG table ptr */
                        pCurScb->SCB_SGLen = (BYTE) (pCurScb->SCB_SGMax - i);
                        /* new SG table len */
                        pCurScb->SCB_SGIdx = (WORD) i;
                        /* for next disc and come in this loop */
                        return (4); /* Go to state 4                */
                  }
                  /* else (xcnt >= 0 , i.e. this sgp already xferred */
            }           /* for */
            return (6); /* Go to state 6                */
      } else {
            pCurScb->SCB_BufPtr += (U32) xcnt;
      }
      return (4);       /* Go to state 4                */
}

/***************************************************************************/
/* state after Data phase */
int tul_state_6(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;

#if DEBUG_STATE
      printk("-s6-");
#endif
      for (;;) {
            switch (pCurHcb->HCS_Phase) {
            case STATUS_IN:   /* Status phase                 */
                  if ((tul_status_msg(pCurHcb)) == -1)
                        return (-1);
                  break;

            case MSG_IN:      /* Message in phase             */
                  pCurScb->SCB_NxtStat = 6;
                  if ((tul_msgin(pCurHcb)) == -1)
                        return (-1);
                  break;

            case MSG_OUT:     /* Message out phase            */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_NOP);       /* msg nop */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                  if (wait_tulip(pCurHcb) == -1)
                        return (-1);
                  break;

            case DATA_IN:     /* Data in phase                */
                  return (tul_xpad_in(pCurHcb));

            case DATA_OUT:    /* Data out phase               */
                  return (tul_xpad_out(pCurHcb));

            default:
                  return (tul_bad_seq(pCurHcb));
            }
      }
}

/***************************************************************************/
int tul_state_7(HCS * pCurHcb)
{
      int cnt, i;

#if DEBUG_STATE
      printk("-s7-");
#endif
      /* flush SCSI FIFO */
      cnt = TUL_RD(pCurHcb->HCS_Base, TUL_SFifoCnt) & 0x1F;
      if (cnt) {
            for (i = 0; i < cnt; i++)
                  TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);
      }
      switch (pCurHcb->HCS_Phase) {
      case DATA_IN:           /* Data in phase                */
      case DATA_OUT:          /* Data out phase               */
            return (tul_bad_seq(pCurHcb));
      default:
            return (6); /* Go to state 6                */
      }
}

/***************************************************************************/
int tul_xfer_data_in(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;

      if ((pCurScb->SCB_Flags & SCF_DIR) == SCF_DOUT) {
            return (6); /* wrong direction */
      }
      TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, pCurScb->SCB_BufLen);

      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_DMA_IN);  /* 7/25/95 */

      if (pCurScb->SCB_Flags & SCF_SG) {  /* S/G xfer */
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XCntH, ((ULONG) pCurScb->SCB_SGLen) << 3);
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XAddH, pCurScb->SCB_BufPtr);
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_SG_IN);
      } else {
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XCntH, pCurScb->SCB_BufLen);
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XAddH, pCurScb->SCB_BufPtr);
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_IN);
      }
      pCurScb->SCB_NxtStat = 0x5;
      return (0);       /* return to OS, wait xfer done , let jas_isr come in */
}


/***************************************************************************/
int tul_xfer_data_out(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;

      if ((pCurScb->SCB_Flags & SCF_DIR) == SCF_DIN) {
            return (6); /* wrong direction */
      }
      TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, pCurScb->SCB_BufLen);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_DMA_OUT);

      if (pCurScb->SCB_Flags & SCF_SG) {  /* S/G xfer */
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XCntH, ((ULONG) pCurScb->SCB_SGLen) << 3);
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XAddH, pCurScb->SCB_BufPtr);
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_SG_OUT);
      } else {
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XCntH, pCurScb->SCB_BufLen);
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_XAddH, pCurScb->SCB_BufPtr);
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_OUT);
      }

      pCurScb->SCB_NxtStat = 0x5;
      return (0);       /* return to OS, wait xfer done , let jas_isr come in */
}


/***************************************************************************/
int tul_xpad_in(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;

      if ((pCurScb->SCB_Flags & SCF_DIR) != SCF_NO_DCHK) {
            pCurScb->SCB_HaStat = HOST_DO_DU;   /* over run             */
      }
      for (;;) {
            if (pCurTcb->TCS_JS_Period & TSC_WIDE_SCSI)
                  TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 2);
            else
                  TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);

            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
            if ((wait_tulip(pCurHcb)) == -1) {
                  return (-1);
            }
            if (pCurHcb->HCS_Phase != DATA_IN) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
                  return (6);
            }
            TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);
      }
}

int tul_xpad_out(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;

      if ((pCurScb->SCB_Flags & SCF_DIR) != SCF_NO_DCHK) {
            pCurScb->SCB_HaStat = HOST_DO_DU;   /* over run             */
      }
      for (;;) {
            if (pCurTcb->TCS_JS_Period & TSC_WIDE_SCSI)
                  TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 2);
            else
                  TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);

            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 0);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
            if ((wait_tulip(pCurHcb)) == -1) {
                  return (-1);
            }
            if (pCurHcb->HCS_Phase != DATA_OUT) {     /* Disable wide CPU to allow read 16 bits */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
                  return (6);
            }
      }
}


/***************************************************************************/
int tul_status_msg(HCS * pCurHcb)
{                       /* status & MSG_IN */
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      BYTE msg;

      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_CMD_COMP);
      if ((wait_tulip(pCurHcb)) == -1) {
            return (-1);
      }
      /* get status */
      pCurScb->SCB_TaStat = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);

      if (pCurHcb->HCS_Phase == MSG_OUT) {
            if (pCurHcb->HCS_JSStatus0 & TSS_PAR_ERROR) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_PARITY);
            } else {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_NOP);
            }
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
            return (wait_tulip(pCurHcb));
      }
      if (pCurHcb->HCS_Phase == MSG_IN) {
            msg = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);
            if (pCurHcb->HCS_JSStatus0 & TSS_PAR_ERROR) {   /* Parity error                 */
                  if ((tul_msgin_accept(pCurHcb)) == -1)
                        return (-1);
                  if (pCurHcb->HCS_Phase != MSG_OUT)
                        return (tul_bad_seq(pCurHcb));
                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_PARITY);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
                  return (wait_tulip(pCurHcb));
            }
            if (msg == 0) {   /* Command complete             */

                  if ((pCurScb->SCB_TaStat & 0x18) == 0x10) {     /* No link support              */
                        return (tul_bad_seq(pCurHcb));
                  }
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_MSG_ACCEPT);
                  return tul_wait_done_disc(pCurHcb);

            }
            if ((msg == MSG_LINK_COMP) || (msg == MSG_LINK_FLAG)) {
                  if ((pCurScb->SCB_TaStat & 0x18) == 0x10)
                        return (tul_msgin_accept(pCurHcb));
            }
      }
      return (tul_bad_seq(pCurHcb));
}


/***************************************************************************/
/* scsi bus free */
int int_tul_busfree(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;

      if (pCurScb != NULL) {
            if (pCurScb->SCB_Status & SCB_SELECT) {         /* selection timeout */
                  tul_unlink_pend_scb(pCurHcb, pCurScb);
                  pCurScb->SCB_HaStat = HOST_SEL_TOUT;
                  tul_append_done_scb(pCurHcb, pCurScb);
            } else {    /* Unexpected bus free          */
                  tul_unlink_busy_scb(pCurHcb, pCurScb);
                  pCurScb->SCB_HaStat = HOST_BUS_FREE;
                  tul_append_done_scb(pCurHcb, pCurScb);
            }
            pCurHcb->HCS_ActScb = NULL;
            pCurHcb->HCS_ActTcs = NULL;
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);           /* Flush SCSI FIFO  */
      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, TSC_INITDEFAULT);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);    /* Enable HW reselect       */
      return (-1);
}


/***************************************************************************/
/* scsi bus reset */
static int int_tul_scsi_rst(HCS * pCurHcb)
{
      SCB *pCurScb;
      int i;

      /* if DMA xfer is pending, abort DMA xfer */
      if (TUL_RD(pCurHcb->HCS_Base, TUL_XStatus) & 0x01) {
            TUL_WR(pCurHcb->HCS_Base + TUL_XCmd, TAX_X_ABT | TAX_X_CLR_FIFO);
            /* wait Abort DMA xfer done */
            while ((TUL_RD(pCurHcb->HCS_Base, TUL_Int) & 0x04) == 0);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
      }
      /* Abort all active & disconnected scb */
      while ((pCurScb = tul_pop_busy_scb(pCurHcb)) != NULL) {
            pCurScb->SCB_HaStat = HOST_BAD_PHAS;
            tul_append_done_scb(pCurHcb, pCurScb);
      }
      pCurHcb->HCS_ActScb = NULL;
      pCurHcb->HCS_ActTcs = NULL;

      /* clr sync nego. done flag */
      for (i = 0; i < pCurHcb->HCS_MaxTar; i++) {
            pCurHcb->HCS_Tcs[i].TCS_Flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
      }
      return (-1);
}


/***************************************************************************/
/* scsi reselection */
int int_tul_resel(HCS * pCurHcb)
{
      SCB *pCurScb;
      TCS *pCurTcb;
      BYTE tag, msg = 0;
      BYTE tar, lun;

      if ((pCurScb = pCurHcb->HCS_ActScb) != NULL) {
            if (pCurScb->SCB_Status & SCB_SELECT) {         /* if waiting for selection complete */
                  pCurScb->SCB_Status &= ~SCB_SELECT;
            }
            pCurHcb->HCS_ActScb = NULL;
      }
      /* --------- get target id---------------------- */
      tar = TUL_RD(pCurHcb->HCS_Base, TUL_SBusId);
      /* ------ get LUN from Identify message----------- */
      lun = TUL_RD(pCurHcb->HCS_Base, TUL_SIdent) & 0x0F;
      /* 07/22/98 from 0x1F -> 0x0F */
      pCurTcb = &pCurHcb->HCS_Tcs[tar];
      pCurHcb->HCS_ActTcs = pCurTcb;
      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurTcb->TCS_SConfig0);
      TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, pCurTcb->TCS_JS_Period);


      /* ------------- tag queueing ? ------------------- */
      if (pCurTcb->TCS_DrvFlags & TCF_DRV_EN_TAG) {
            if ((tul_msgin_accept(pCurHcb)) == -1)
                  return (-1);
            if (pCurHcb->HCS_Phase != MSG_IN)
                  goto no_tag;
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
            if ((wait_tulip(pCurHcb)) == -1)
                  return (-1);
            msg = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);     /* Read Tag Message    */

            if ((msg < MSG_STAG) || (msg > MSG_OTAG)) /* Is simple Tag      */
                  goto no_tag;

            if ((tul_msgin_accept(pCurHcb)) == -1)
                  return (-1);

            if (pCurHcb->HCS_Phase != MSG_IN)
                  goto no_tag;

            TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
            if ((wait_tulip(pCurHcb)) == -1)
                  return (-1);
            tag = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);     /* Read Tag ID       */
            pCurScb = pCurHcb->HCS_Scb + tag;
            if ((pCurScb->SCB_Target != tar) || (pCurScb->SCB_Lun != lun)) {
                  return tul_msgout_abort_tag(pCurHcb);
            }
            if (pCurScb->SCB_Status != SCB_BUSY) {    /* 03/24/95             */
                  return tul_msgout_abort_tag(pCurHcb);
            }
            pCurHcb->HCS_ActScb = pCurScb;
            if ((tul_msgin_accept(pCurHcb)) == -1)
                  return (-1);
      } else {          /* No tag               */
            no_tag:
            if ((pCurScb = tul_find_busy_scb(pCurHcb, tar | (lun << 8))) == NULL) {
                  return tul_msgout_abort_targ(pCurHcb);
            }
            pCurHcb->HCS_ActScb = pCurScb;
            if (!(pCurTcb->TCS_DrvFlags & TCF_DRV_EN_TAG)) {
                  if ((tul_msgin_accept(pCurHcb)) == -1)
                        return (-1);
            }
      }
      return 0;
}


/***************************************************************************/
static int int_tul_bad_seq(HCS * pCurHcb)
{                       /* target wrong phase           */
      SCB *pCurScb;
      int i;

      tul_reset_scsi(pCurHcb, 10);

      while ((pCurScb = tul_pop_busy_scb(pCurHcb)) != NULL) {
            pCurScb->SCB_HaStat = HOST_BAD_PHAS;
            tul_append_done_scb(pCurHcb, pCurScb);
      }
      for (i = 0; i < pCurHcb->HCS_MaxTar; i++) {
            pCurHcb->HCS_Tcs[i].TCS_Flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
      }
      return (-1);
}


/***************************************************************************/
int tul_msgout_abort_targ(HCS * pCurHcb)
{

      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));
      if (tul_msgin_accept(pCurHcb) == -1)
            return (-1);
      if (pCurHcb->HCS_Phase != MSG_OUT)
            return (tul_bad_seq(pCurHcb));

      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_ABORT);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);

      return tul_wait_disc(pCurHcb);
}

/***************************************************************************/
int tul_msgout_abort_tag(HCS * pCurHcb)
{

      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));
      if (tul_msgin_accept(pCurHcb) == -1)
            return (-1);
      if (pCurHcb->HCS_Phase != MSG_OUT)
            return (tul_bad_seq(pCurHcb));

      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_ABORT_TAG);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);

      return tul_wait_disc(pCurHcb);

}

/***************************************************************************/
int tul_msgin(HCS * pCurHcb)
{
      TCS *pCurTcb;

      for (;;) {

            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);

            TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
            if ((wait_tulip(pCurHcb)) == -1)
                  return (-1);

            switch (TUL_RD(pCurHcb->HCS_Base, TUL_SFifo)) {
            case MSG_DISC:    /* Disconnect msg */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_MSG_ACCEPT);

                  return tul_wait_disc(pCurHcb);

            case MSG_SDP:
            case MSG_RESTORE:
            case MSG_NOP:
                  tul_msgin_accept(pCurHcb);
                  break;

            case MSG_REJ:     /* Clear ATN first              */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SSignal,
                         (TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)));
                  pCurTcb = pCurHcb->HCS_ActTcs;
                  if ((pCurTcb->TCS_Flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {   /* do sync nego */
                        TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));
                  }
                  tul_msgin_accept(pCurHcb);
                  break;

            case MSG_EXTEND:  /* extended msg */
                  tul_msgin_extend(pCurHcb);
                  break;

            case MSG_IGNOREWIDE:
                  tul_msgin_accept(pCurHcb);
                  break;

                  /* get */
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
                  if (wait_tulip(pCurHcb) == -1)
                        return -1;

                  TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 0); /* put pad  */
                  TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);     /* get IGNORE field */
                  TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);     /* get pad */

                  tul_msgin_accept(pCurHcb);
                  break;

            case MSG_COMP:
                  {
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);
                        TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_MSG_ACCEPT);
                        return tul_wait_done_disc(pCurHcb);
                  }
            default:
                  tul_msgout_reject(pCurHcb);
                  break;
            }
            if (pCurHcb->HCS_Phase != MSG_IN)
                  return (pCurHcb->HCS_Phase);
      }
      /* statement won't reach here */
}




/***************************************************************************/
int tul_msgout_reject(HCS * pCurHcb)
{

      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));

      if ((tul_msgin_accept(pCurHcb)) == -1)
            return (-1);

      if (pCurHcb->HCS_Phase == MSG_OUT) {
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_REJ);       /* Msg reject           */
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
            return (wait_tulip(pCurHcb));
      }
      return (pCurHcb->HCS_Phase);
}



/***************************************************************************/
int tul_msgout_ide(HCS * pCurHcb)
{
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_IDE);       /* Initiator Detected Error */
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
      return (wait_tulip(pCurHcb));
}


/***************************************************************************/
int tul_msgin_extend(HCS * pCurHcb)
{
      BYTE len, idx;

      if (tul_msgin_accept(pCurHcb) != MSG_IN)
            return (pCurHcb->HCS_Phase);

      /* Get extended msg length      */
      TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
      if (wait_tulip(pCurHcb) == -1)
            return (-1);

      len = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);
      pCurHcb->HCS_Msg[0] = len;
      for (idx = 1; len != 0; len--) {

            if ((tul_msgin_accept(pCurHcb)) != MSG_IN)
                  return (pCurHcb->HCS_Phase);
            TUL_WRLONG(pCurHcb->HCS_Base + TUL_SCnt0, 1);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_IN);
            if (wait_tulip(pCurHcb) == -1)
                  return (-1);
            pCurHcb->HCS_Msg[idx++] = TUL_RD(pCurHcb->HCS_Base, TUL_SFifo);
      }
      if (pCurHcb->HCS_Msg[1] == 1) {           /* if it's synchronous data transfer request */
            if (pCurHcb->HCS_Msg[0] != 3) /* if length is not right */
                  return (tul_msgout_reject(pCurHcb));
            if (pCurHcb->HCS_ActTcs->TCS_Flags & TCF_NO_SYNC_NEGO) {    /* Set OFFSET=0 to do async, nego back */
                  pCurHcb->HCS_Msg[3] = 0;
            } else {
                  if ((tul_msgin_sync(pCurHcb) == 0) &&
                      (pCurHcb->HCS_ActTcs->TCS_Flags & TCF_SYNC_DONE)) {
                        tul_sync_done(pCurHcb);
                        return (tul_msgin_accept(pCurHcb));
                  }
            }

            TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));
            if ((tul_msgin_accept(pCurHcb)) != MSG_OUT)
                  return (pCurHcb->HCS_Phase);
            /* sync msg out */
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);

            tul_sync_done(pCurHcb);

            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_EXTEND);
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 3);
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 1);
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurHcb->HCS_Msg[2]);
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurHcb->HCS_Msg[3]);

            TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
            return (wait_tulip(pCurHcb));
      }
      if ((pCurHcb->HCS_Msg[0] != 2) || (pCurHcb->HCS_Msg[1] != 3))
            return (tul_msgout_reject(pCurHcb));
      /* if it's WIDE DATA XFER REQ   */
      if (pCurHcb->HCS_ActTcs->TCS_Flags & TCF_NO_WDTR) {
            pCurHcb->HCS_Msg[2] = 0;
      } else {
            if (pCurHcb->HCS_Msg[2] > 2)  /* > 32 bits            */
                  return (tul_msgout_reject(pCurHcb));
            if (pCurHcb->HCS_Msg[2] == 2) {           /* == 32                */
                  pCurHcb->HCS_Msg[2] = 1;
            } else {
                  if ((pCurHcb->HCS_ActTcs->TCS_Flags & TCF_NO_WDTR) == 0) {
                        wdtr_done(pCurHcb);
                        if ((pCurHcb->HCS_ActTcs->TCS_Flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
                              TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));
                        return (tul_msgin_accept(pCurHcb));
                  }
            }
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SSignal, ((TUL_RD(pCurHcb->HCS_Base, TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN));

      if (tul_msgin_accept(pCurHcb) != MSG_OUT)
            return (pCurHcb->HCS_Phase);
      /* WDTR msg out                 */
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_EXTEND);
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 2);
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, 3);
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurHcb->HCS_Msg[2]);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);
      return (wait_tulip(pCurHcb));
}

/***************************************************************************/
int tul_msgin_sync(HCS * pCurHcb)
{
      char default_period;

      default_period = tul_rate_tbl[pCurHcb->HCS_ActTcs->TCS_Flags & TCF_SCSI_RATE];
      if (pCurHcb->HCS_Msg[3] > MAX_OFFSET) {
            pCurHcb->HCS_Msg[3] = MAX_OFFSET;
            if (pCurHcb->HCS_Msg[2] < default_period) {
                  pCurHcb->HCS_Msg[2] = default_period;
                  return 1;
            }
            if (pCurHcb->HCS_Msg[2] >= 59) {    /* Change to async              */
                  pCurHcb->HCS_Msg[3] = 0;
            }
            return 1;
      }
      /* offset requests asynchronous transfers ? */
      if (pCurHcb->HCS_Msg[3] == 0) {
            return 0;
      }
      if (pCurHcb->HCS_Msg[2] < default_period) {
            pCurHcb->HCS_Msg[2] = default_period;
            return 1;
      }
      if (pCurHcb->HCS_Msg[2] >= 59) {
            pCurHcb->HCS_Msg[3] = 0;
            return 1;
      }
      return 0;
}


/***************************************************************************/
int wdtr_done(HCS * pCurHcb)
{
      pCurHcb->HCS_ActTcs->TCS_Flags &= ~TCF_SYNC_DONE;
      pCurHcb->HCS_ActTcs->TCS_Flags |= TCF_WDTR_DONE;

      pCurHcb->HCS_ActTcs->TCS_JS_Period = 0;
      if (pCurHcb->HCS_Msg[2]) {    /* if 16 bit */
            pCurHcb->HCS_ActTcs->TCS_JS_Period |= TSC_WIDE_SCSI;
      }
      pCurHcb->HCS_ActTcs->TCS_SConfig0 &= ~TSC_ALT_PERIOD;
      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurHcb->HCS_ActTcs->TCS_SConfig0);
      TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, pCurHcb->HCS_ActTcs->TCS_JS_Period);

      return 1;
}

/***************************************************************************/
int tul_sync_done(HCS * pCurHcb)
{
      int i;

      pCurHcb->HCS_ActTcs->TCS_Flags |= TCF_SYNC_DONE;

      if (pCurHcb->HCS_Msg[3]) {
            pCurHcb->HCS_ActTcs->TCS_JS_Period |= pCurHcb->HCS_Msg[3];
            for (i = 0; i < 8; i++) {
                  if (tul_rate_tbl[i] >= pCurHcb->HCS_Msg[2])     /* pick the big one */
                        break;
            }
            pCurHcb->HCS_ActTcs->TCS_JS_Period |= (i << 4);
            pCurHcb->HCS_ActTcs->TCS_SConfig0 |= TSC_ALT_PERIOD;
      }
      TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, pCurHcb->HCS_ActTcs->TCS_SConfig0);
      TUL_WR(pCurHcb->HCS_Base + TUL_SPeriod, pCurHcb->HCS_ActTcs->TCS_JS_Period);

      return (-1);
}


int tul_post_scsi_rst(HCS * pCurHcb)
{
      SCB *pCurScb;
      TCS *pCurTcb;
      int i;

      pCurHcb->HCS_ActScb = NULL;
      pCurHcb->HCS_ActTcs = NULL;
      pCurHcb->HCS_Flags = 0;

      while ((pCurScb = tul_pop_busy_scb(pCurHcb)) != NULL) {
            pCurScb->SCB_HaStat = HOST_BAD_PHAS;
            tul_append_done_scb(pCurHcb, pCurScb);
      }
      /* clear sync done flag         */
      pCurTcb = &pCurHcb->HCS_Tcs[0];
      for (i = 0; i < pCurHcb->HCS_MaxTar; pCurTcb++, i++) {
            pCurTcb->TCS_Flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
            /* Initialize the sync. xfer register values to an asyn xfer */
            pCurTcb->TCS_JS_Period = 0;
            pCurTcb->TCS_SConfig0 = pCurHcb->HCS_SConf1;
            pCurHcb->HCS_ActTags[0] = 0;  /* 07/22/98 */
            pCurHcb->HCS_Tcs[i].TCS_Flags &= ~TCF_BUSY;     /* 07/22/98 */
      }                 /* for */

      return (-1);
}

/***************************************************************************/
void tul_select_atn_stop(HCS * pCurHcb, SCB * pCurScb)
{
      pCurScb->SCB_Status |= SCB_SELECT;
      pCurScb->SCB_NxtStat = 0x1;
      pCurHcb->HCS_ActScb = pCurScb;
      pCurHcb->HCS_ActTcs = &pCurHcb->HCS_Tcs[pCurScb->SCB_Target];
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_SELATNSTOP);
      return;
}


/***************************************************************************/
void tul_select_atn(HCS * pCurHcb, SCB * pCurScb)
{
      int i;

      pCurScb->SCB_Status |= SCB_SELECT;
      pCurScb->SCB_NxtStat = 0x2;

      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_Ident);
      for (i = 0; i < (int) pCurScb->SCB_CDBLen; i++)
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_CDB[i]);
      pCurHcb->HCS_ActTcs = &pCurHcb->HCS_Tcs[pCurScb->SCB_Target];
      pCurHcb->HCS_ActScb = pCurScb;
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_SEL_ATN);
      return;
}

/***************************************************************************/
void tul_select_atn3(HCS * pCurHcb, SCB * pCurScb)
{
      int i;

      pCurScb->SCB_Status |= SCB_SELECT;
      pCurScb->SCB_NxtStat = 0x2;

      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_Ident);
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_TagMsg);
      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_TagId);
      for (i = 0; i < (int) pCurScb->SCB_CDBLen; i++)
            TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, pCurScb->SCB_CDB[i]);
      pCurHcb->HCS_ActTcs = &pCurHcb->HCS_Tcs[pCurScb->SCB_Target];
      pCurHcb->HCS_ActScb = pCurScb;
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_SEL_ATN3);
      return;
}

/***************************************************************************/
/* SCSI Bus Device Reset */
int tul_bus_device_reset(HCS * pCurHcb)
{
      SCB *pCurScb = pCurHcb->HCS_ActScb;
      TCS *pCurTcb = pCurHcb->HCS_ActTcs;
      SCB *pTmpScb, *pPrevScb;
      BYTE tar;

      if (pCurHcb->HCS_Phase != MSG_OUT) {
            return (int_tul_bad_seq(pCurHcb));  /* Unexpected phase             */
      }
      tul_unlink_pend_scb(pCurHcb, pCurScb);
      tul_release_scb(pCurHcb, pCurScb);


      tar = pCurScb->SCB_Target;    /* target                       */
      pCurTcb->TCS_Flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
      /* clr sync. nego & WDTR flags  07/22/98 */

      /* abort all SCB with same target */
      pPrevScb = pTmpScb = pCurHcb->HCS_FirstBusy;    /* Check Busy queue */
      while (pTmpScb != NULL) {

            if (pTmpScb->SCB_Target == tar) {
                  /* unlink it */
                  if (pTmpScb == pCurHcb->HCS_FirstBusy) {
                        if ((pCurHcb->HCS_FirstBusy = pTmpScb->SCB_NxtScb) == NULL)
                              pCurHcb->HCS_LastBusy = NULL;
                  } else {
                        pPrevScb->SCB_NxtScb = pTmpScb->SCB_NxtScb;
                        if (pTmpScb == pCurHcb->HCS_LastBusy)
                              pCurHcb->HCS_LastBusy = pPrevScb;
                  }
                  pTmpScb->SCB_HaStat = HOST_ABORTED;
                  tul_append_done_scb(pCurHcb, pTmpScb);
            }
            /* Previous haven't change      */
            else {
                  pPrevScb = pTmpScb;
            }
            pTmpScb = pTmpScb->SCB_NxtScb;
      }

      TUL_WR(pCurHcb->HCS_Base + TUL_SFifo, MSG_DEVRST);
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_XF_FIFO_OUT);

      return tul_wait_disc(pCurHcb);

}

/***************************************************************************/
int tul_msgin_accept(HCS * pCurHcb)
{
      TUL_WR(pCurHcb->HCS_Base + TUL_SCmd, TSC_MSG_ACCEPT);
      return (wait_tulip(pCurHcb));
}

/***************************************************************************/
int wait_tulip(HCS * pCurHcb)
{

      while (!((pCurHcb->HCS_JSStatus0 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus0))
             & TSS_INT_PENDING));

      pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt);
      pCurHcb->HCS_Phase = pCurHcb->HCS_JSStatus0 & TSS_PH_MASK;
      pCurHcb->HCS_JSStatus1 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus1);

      if (pCurHcb->HCS_JSInt & TSS_RESEL_INT) { /* if SCSI bus reset detected   */
            return (int_tul_resel(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & TSS_SEL_TIMEOUT) {     /* if selected/reselected timeout interrupt */
            return (int_tul_busfree(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & TSS_SCSIRST_INT) {     /* if SCSI bus reset detected   */
            return (int_tul_scsi_rst(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & TSS_DISC_INT) {  /* BUS disconnection            */
            if (pCurHcb->HCS_Flags & HCF_EXPECT_DONE_DISC) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);           /* Flush SCSI FIFO  */
                  tul_unlink_busy_scb(pCurHcb, pCurHcb->HCS_ActScb);
                  pCurHcb->HCS_ActScb->SCB_HaStat = 0;
                  tul_append_done_scb(pCurHcb, pCurHcb->HCS_ActScb);
                  pCurHcb->HCS_ActScb = NULL;
                  pCurHcb->HCS_ActTcs = NULL;
                  pCurHcb->HCS_Flags &= ~HCF_EXPECT_DONE_DISC;
                  TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, TSC_INITDEFAULT);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);    /* Enable HW reselect       */
                  return (-1);
            }
            if (pCurHcb->HCS_Flags & HCF_EXPECT_DISC) {
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);           /* Flush SCSI FIFO  */
                  pCurHcb->HCS_ActScb = NULL;
                  pCurHcb->HCS_ActTcs = NULL;
                  pCurHcb->HCS_Flags &= ~HCF_EXPECT_DISC;
                  TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, TSC_INITDEFAULT);
                  TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);    /* Enable HW reselect       */
                  return (-1);
            }
            return (int_tul_busfree(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & (TSS_FUNC_COMP | TSS_BUS_SERV)) {
            return (pCurHcb->HCS_Phase);
      }
      return (pCurHcb->HCS_Phase);
}
/***************************************************************************/
int tul_wait_disc(HCS * pCurHcb)
{

      while (!((pCurHcb->HCS_JSStatus0 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus0))
             & TSS_INT_PENDING));


      pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt);

      if (pCurHcb->HCS_JSInt & TSS_SCSIRST_INT) {     /* if SCSI bus reset detected   */
            return (int_tul_scsi_rst(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & TSS_DISC_INT) {  /* BUS disconnection            */
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);           /* Flush SCSI FIFO  */
            TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, TSC_INITDEFAULT);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);    /* Enable HW reselect       */
            pCurHcb->HCS_ActScb = NULL;
            return (-1);
      }
      return (tul_bad_seq(pCurHcb));
}

/***************************************************************************/
int tul_wait_done_disc(HCS * pCurHcb)
{


      while (!((pCurHcb->HCS_JSStatus0 = TUL_RD(pCurHcb->HCS_Base, TUL_SStatus0))
             & TSS_INT_PENDING));

      pCurHcb->HCS_JSInt = TUL_RD(pCurHcb->HCS_Base, TUL_SInt);


      if (pCurHcb->HCS_JSInt & TSS_SCSIRST_INT) {     /* if SCSI bus reset detected   */
            return (int_tul_scsi_rst(pCurHcb));
      }
      if (pCurHcb->HCS_JSInt & TSS_DISC_INT) {  /* BUS disconnection            */
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl0, TSC_FLUSH_FIFO);           /* Flush SCSI FIFO  */
            TUL_WR(pCurHcb->HCS_Base + TUL_SConfig, TSC_INITDEFAULT);
            TUL_WR(pCurHcb->HCS_Base + TUL_SCtrl1, TSC_HW_RESELECT);    /* Enable HW reselect       */
            tul_unlink_busy_scb(pCurHcb, pCurHcb->HCS_ActScb);

            tul_append_done_scb(pCurHcb, pCurHcb->HCS_ActScb);
            pCurHcb->HCS_ActScb = NULL;
            return (-1);
      }
      return (tul_bad_seq(pCurHcb));
}

static irqreturn_t i91u_intr(int irqno, void *dev_id, struct pt_regs *regs)
{
      struct Scsi_Host *dev = dev_id;
      unsigned long flags;
      
      spin_lock_irqsave(dev->host_lock, flags);
      tul_isr((HCS *)dev->base);
      spin_unlock_irqrestore(dev->host_lock, flags);
      return IRQ_HANDLED;
}

static int tul_NewReturnNumberOfAdapters(void)
{
      struct pci_dev *pDev = NULL;  /* Start from none              */
      int iAdapters = 0;
      long dRegValue;
      WORD wBIOS;
      int i = 0;

      init_i91uAdapter_table();

      for (i = 0; i < ARRAY_SIZE(i91u_pci_devices); i++)
      {
            while ((pDev = pci_find_device(i91u_pci_devices[i].vendor_id, i91u_pci_devices[i].device_id, pDev)) != NULL) {
                  if (pci_enable_device(pDev))
                        continue;
                  pci_read_config_dword(pDev, 0x44, (u32 *) & dRegValue);
                  wBIOS = (UWORD) (dRegValue & 0xFF);
                  if (((dRegValue & 0xFF00) >> 8) == 0xFF)
                        dRegValue = 0;
                  wBIOS = (wBIOS << 8) + ((UWORD) ((dRegValue & 0xFF00) >> 8));
                  if (pci_set_dma_mask(pDev, DMA_32BIT_MASK)) {
                        printk(KERN_WARNING 
                               "i91u: Could not set 32 bit DMA mask\n");
                        continue;
                  }

                  if (Addi91u_into_Adapter_table(wBIOS,
                                          (pDev->resource[0].start),
                                                pDev->irq,
                                                pDev->bus->number,
                                                (pDev->devfn >> 3)
                        ) == 0)
                        iAdapters++;
            }
      }

      return (iAdapters);
}

static int i91u_detect(struct scsi_host_template * tpnt)
{
      HCS *pHCB;
      struct Scsi_Host *hreg;
      unsigned long i;  /* 01/14/98                     */
      int ok = 0, iAdapters;
      ULONG dBiosAdr;
      BYTE *pbBiosAdr;

      /* Get total number of adapters in the motherboard */
      iAdapters = tul_NewReturnNumberOfAdapters();
      if (iAdapters == 0)     /* If no tulip founded, return */
            return (0);

      tul_num_ch = (iAdapters > tul_num_ch) ? tul_num_ch : iAdapters;
      /* Update actually channel number */
      if (tul_tag_enable) {   /* 1.01i                  */
            tul_num_scb = MAX_TARGETS * i91u_MAXQUEUE;
      } else {
            tul_num_scb = MAX_TARGETS + 3;      /* 1-tape, 1-CD_ROM, 1- extra */
      }                 /* Update actually SCBs per adapter */

      /* Get total memory needed for HCS */
      i = tul_num_ch * sizeof(HCS);
      memset((unsigned char *) &tul_hcs[0], 0, i);    /* Initialize tul_hcs 0 */
      /* Get total memory needed for SCB */

      for (; tul_num_scb >= MAX_TARGETS + 3; tul_num_scb--) {
            i = tul_num_ch * tul_num_scb * sizeof(SCB);
            if ((tul_scb = (SCB *) kmalloc(i, GFP_ATOMIC | GFP_DMA)) != NULL)
                  break;
      }
      if (tul_scb == NULL) {
            printk("i91u: SCB memory allocation error\n");
            return (0);
      }
      memset((unsigned char *) tul_scb, 0, i);

      for (i = 0, pHCB = &tul_hcs[0];           /* Get pointer for control block */
           i < tul_num_ch;
           i++, pHCB++) {
            get_tulipPCIConfig(pHCB, i);

            dBiosAdr = pHCB->HCS_BIOS;
            dBiosAdr = (dBiosAdr << 4);

            pbBiosAdr = phys_to_virt(dBiosAdr);

            init_tulip(pHCB, tul_scb + (i * tul_num_scb), tul_num_scb, pbBiosAdr, 10);
            request_region(pHCB->HCS_Base, 256, "i91u"); /* Register */ 

            pHCB->HCS_Index = i;    /* 7/29/98 */
            hreg = scsi_register(tpnt, sizeof(HCS));
            if(hreg == NULL) {
                  release_region(pHCB->HCS_Base, 256);
                  return 0;
            }
            hreg->io_port = pHCB->HCS_Base;
            hreg->n_io_port = 0xff;
            hreg->can_queue = tul_num_scb;      /* 03/05/98                      */
            hreg->unique_id = pHCB->HCS_Base;
            hreg->max_id = pHCB->HCS_MaxTar;
            hreg->max_lun = 32;     /* 10/21/97                     */
            hreg->irq = pHCB->HCS_Intr;
            hreg->this_id = pHCB->HCS_SCSI_ID;  /* Assign HCS index           */
            hreg->base = (unsigned long)pHCB;
            hreg->sg_tablesize = TOTAL_SG_ENTRY;      /* Maximun support is 32 */

            /* Initial tulip chip           */
            ok = request_irq(pHCB->HCS_Intr, i91u_intr, IRQF_DISABLED | IRQF_SHARED, "i91u", hreg);
            if (ok < 0) {
                  printk(KERN_WARNING "i91u: unable to request IRQ %d\n\n", pHCB->HCS_Intr);
                  return 0;
            }
      }

      tpnt->this_id = -1;
      tpnt->can_queue = 1;

      return 1;
}

static void i91uBuildSCB(HCS * pHCB, SCB * pSCB, struct scsi_cmnd * SCpnt)
{                       /* Create corresponding SCB     */
      struct scatterlist *pSrbSG;
      SG *pSG;          /* Pointer to SG list           */
      int i;
      long TotalLen;
      dma_addr_t dma_addr;

      pSCB->SCB_Post = i91uSCBPost; /* i91u's callback routine      */
      pSCB->SCB_Srb = SCpnt;
      pSCB->SCB_Opcode = ExecSCSI;
      pSCB->SCB_Flags = SCF_POST;   /* After SCSI done, call post routine */
      pSCB->SCB_Target = SCpnt->device->id;
      pSCB->SCB_Lun = SCpnt->device->lun;
      pSCB->SCB_Ident = SCpnt->device->lun | DISC_ALLOW;

      pSCB->SCB_Flags |= SCF_SENSE; /* Turn on auto request sense   */
      dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->sense_buffer,
                          SENSE_SIZE, DMA_FROM_DEVICE);
      pSCB->SCB_SensePtr = cpu_to_le32((u32)dma_addr);
      pSCB->SCB_SenseLen = cpu_to_le32(SENSE_SIZE);
      SCpnt->SCp.ptr = (char *)(unsigned long)dma_addr;

      pSCB->SCB_CDBLen = SCpnt->cmd_len;
      pSCB->SCB_HaStat = 0;
      pSCB->SCB_TaStat = 0;
      memcpy(&pSCB->SCB_CDB[0], &SCpnt->cmnd, SCpnt->cmd_len);

      if (SCpnt->device->tagged_supported) {    /* Tag Support                  */
            pSCB->SCB_TagMsg = SIMPLE_QUEUE_TAG;      /* Do simple tag only   */
      } else {
            pSCB->SCB_TagMsg = 0;   /* No tag support               */
      }
      /* todo handle map_sg error */
      if (SCpnt->use_sg) {
            dma_addr = dma_map_single(&pHCB->pci_dev->dev, &pSCB->SCB_SGList[0],
                                sizeof(struct SG_Struc) * TOTAL_SG_ENTRY,
                                DMA_BIDIRECTIONAL);
            pSCB->SCB_BufPtr = cpu_to_le32((u32)dma_addr);
            SCpnt->SCp.dma_handle = dma_addr;

            pSrbSG = (struct scatterlist *) SCpnt->request_buffer;
            pSCB->SCB_SGLen = dma_map_sg(&pHCB->pci_dev->dev, pSrbSG,
                                   SCpnt->use_sg, SCpnt->sc_data_direction);

            pSCB->SCB_Flags |= SCF_SG;    /* Turn on SG list flag       */
            for (i = 0, TotalLen = 0, pSG = &pSCB->SCB_SGList[0]; /* 1.01g */
                 i < pSCB->SCB_SGLen; i++, pSG++, pSrbSG++) {
                  pSG->SG_Ptr = cpu_to_le32((u32)sg_dma_address(pSrbSG));
                  TotalLen += pSG->SG_Len = cpu_to_le32((u32)sg_dma_len(pSrbSG));
            }

            pSCB->SCB_BufLen = (SCpnt->request_bufflen > TotalLen) ?
                TotalLen : SCpnt->request_bufflen;
      } else if (SCpnt->request_bufflen) {            /* Non SG */
            dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->request_buffer,
                                SCpnt->request_bufflen,
                                SCpnt->sc_data_direction);
            SCpnt->SCp.dma_handle = dma_addr;
            pSCB->SCB_BufPtr = cpu_to_le32((u32)dma_addr);
            pSCB->SCB_BufLen = cpu_to_le32((u32)SCpnt->request_bufflen);
            pSCB->SCB_SGLen = 0;
      } else {
            pSCB->SCB_BufLen = 0;
            pSCB->SCB_SGLen = 0;
      }
}

static int i91u_queuecommand(struct scsi_cmnd *cmd,
            void (*done)(struct scsi_cmnd *))
{
      HCS *pHCB = (HCS *) cmd->device->host->base;
      register SCB *pSCB;

      cmd->scsi_done = done;

      pSCB = tul_alloc_scb(pHCB);
      if (!pSCB)
            return SCSI_MLQUEUE_HOST_BUSY;

      i91uBuildSCB(pHCB, pSCB, cmd);
      tul_exec_scb(pHCB, pSCB);
      return 0;
}

#if 0 /* no new EH yet */
/*
 *  Abort a queued command
 *  (commands that are on the bus can't be aborted easily)
 */
static int i91u_abort(struct scsi_cmnd * SCpnt)
{
      HCS *pHCB;

      pHCB = (HCS *) SCpnt->device->host->base;
      return tul_abort_srb(pHCB, SCpnt);
}

/*
 *  Reset registers, reset a hanging bus and
 *  kill active and disconnected commands for target w/o soft reset
 */
static int i91u_reset(struct scsi_cmnd * SCpnt, unsigned int reset_flags)
{                       /* I need Host Control Block Information */
      HCS *pHCB;

      pHCB = (HCS *) SCpnt->device->host->base;

      if (reset_flags & (SCSI_RESET_SUGGEST_BUS_RESET | SCSI_RESET_SUGGEST_HOST_RESET))
            return tul_reset_scsi_bus(pHCB);
      else
            return tul_device_reset(pHCB, SCpnt, SCpnt->device->id, reset_flags);
}
#endif

static int i91u_bus_reset(struct scsi_cmnd * SCpnt)
{
      HCS *pHCB;

      pHCB = (HCS *) SCpnt->device->host->base;

      spin_lock_irq(SCpnt->device->host->host_lock);
      tul_reset_scsi(pHCB, 0);
      spin_unlock_irq(SCpnt->device->host->host_lock);

      return SUCCESS;
}

/*
 * Return the "logical geometry"
 */
static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
            sector_t capacity, int *info_array)
{
      HCS *pHcb;        /* Point to Host adapter control block */
      TCS *pTcb;

      pHcb = (HCS *) sdev->host->base;
      pTcb = &pHcb->HCS_Tcs[sdev->id];

      if (pTcb->TCS_DrvHead) {
            info_array[0] = pTcb->TCS_DrvHead;
            info_array[1] = pTcb->TCS_DrvSector;
            info_array[2] = (unsigned long)capacity / pTcb->TCS_DrvHead / pTcb->TCS_DrvSector;
      } else {
            if (pTcb->TCS_DrvFlags & TCF_DRV_255_63) {
                  info_array[0] = 255;
                  info_array[1] = 63;
                  info_array[2] = (unsigned long)capacity / 255 / 63;
            } else {
                  info_array[0] = 64;
                  info_array[1] = 32;
                  info_array[2] = (unsigned long)capacity >> 11;
            }
      }

#if defined(DEBUG_BIOSPARAM)
      if (i91u_debug & debug_biosparam) {
            printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
                   info_array[0], info_array[1], info_array[2]);
            printk("WARNING: check, if the bios geometry is correct.\n");
      }
#endif

      return 0;
}

static void i91u_unmap_cmnd(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
{
      /* auto sense buffer */
      if (cmnd->SCp.ptr) {
            dma_unmap_single(&pci_dev->dev,
                         (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
                         SENSE_SIZE, DMA_FROM_DEVICE);
            cmnd->SCp.ptr = NULL;
      }

      /* request buffer */
      if (cmnd->use_sg) {
            dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
                         sizeof(struct SG_Struc) * TOTAL_SG_ENTRY,
                         DMA_BIDIRECTIONAL);

            dma_unmap_sg(&pci_dev->dev, cmnd->request_buffer,
                       cmnd->use_sg,
                       cmnd->sc_data_direction);
      } else if (cmnd->request_bufflen) {
            dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
                         cmnd->request_bufflen,
                         cmnd->sc_data_direction);
      }
}

/*****************************************************************************
 Function name  : i91uSCBPost
 Description    : This is callback routine be called when tulip finish one
                  SCSI command.
 Input          : pHCB  -       Pointer to host adapter control block.
              pSCB  -       Pointer to SCSI control block.
 Output         : None.
 Return         : None.
*****************************************************************************/
static void i91uSCBPost(BYTE * pHcb, BYTE * pScb)
{
      struct scsi_cmnd *pSRB; /* Pointer to SCSI request block */
      HCS *pHCB;
      SCB *pSCB;

      pHCB = (HCS *) pHcb;
      pSCB = (SCB *) pScb;
      if ((pSRB = pSCB->SCB_Srb) == 0) {
            printk("i91uSCBPost: SRB pointer is empty\n");

            tul_release_scb(pHCB, pSCB);  /* Release SCB for current channel */
            return;
      }
      switch (pSCB->SCB_HaStat) {
      case 0x0:
      case 0xa:         /* Linked command complete without error and linked normally */
      case 0xb:         /* Linked command complete without error interrupt generated */
            pSCB->SCB_HaStat = 0;
            break;

      case 0x11:        /* Selection time out-The initiator selection or target
                           reselection was not complete within the SCSI Time out period */
            pSCB->SCB_HaStat = DID_TIME_OUT;
            break;

      case 0x14:        /* Target bus phase sequence failure-An invalid bus phase or bus
                           phase sequence was requested by the target. The host adapter
                           will generate a SCSI Reset Condition, notifying the host with
                           a SCRD interrupt */
            pSCB->SCB_HaStat = DID_RESET;
            break;

      case 0x1a:        /* SCB Aborted. 07/21/98 */
            pSCB->SCB_HaStat = DID_ABORT;
            break;

      case 0x12:        /* Data overrun/underrun-The target attempted to transfer more data
                           than was allocated by the Data Length field or the sum of the
                           Scatter / Gather Data Length fields. */
      case 0x13:        /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
      case 0x16:        /* Invalid SCB Operation Code. */

      default:
            printk("ini9100u: %x %x\n", pSCB->SCB_HaStat, pSCB->SCB_TaStat);
            pSCB->SCB_HaStat = DID_ERROR; /* Couldn't find any better */
            break;
      }

      pSRB->result = pSCB->SCB_TaStat | (pSCB->SCB_HaStat << 16);

      if (pSRB == NULL) {
            printk("pSRB is NULL\n");
      }

      i91u_unmap_cmnd(pHCB->pci_dev, pSRB);
      pSRB->scsi_done(pSRB);  /* Notify system DONE           */

      tul_release_scb(pHCB, pSCB);  /* Release SCB for current channel */
}

/*
 * Release ressources
 */
static int i91u_release(struct Scsi_Host *hreg)
{
      free_irq(hreg->irq, hreg);
      release_region(hreg->io_port, 256);
      return 0;
}
MODULE_LICENSE("Dual BSD/GPL");

static struct scsi_host_template driver_template = {
      .proc_name  = "INI9100U",
      .name       = i91u_REVID,
      .detect           = i91u_detect,
      .release    = i91u_release,
      .queuecommand     = i91u_queuecommand,
//    .abort            = i91u_abort,
//    .reset            = i91u_reset,
      .eh_bus_reset_handler = i91u_bus_reset,
      .bios_param = i91u_biosparam,
      .can_queue  = 1,
      .this_id    = 1,
      .sg_tablesize     = SG_ALL,
      .cmd_per_lun      = 1,
      .use_clustering   = ENABLE_CLUSTERING,
};
#include "scsi_module.c"


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