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dc395x.c

/*
 * dc395x.c
 *
 * Device Driver for Tekram DC395(U/UW/F), DC315(U)
 * PCI SCSI Bus Master Host Adapter
 * (SCSI chip set used Tekram ASIC TRM-S1040)
 *
 * Authors:
 *  C.L. Huang <ching@tekram.com.tw>
 *  Erich Chen <erich@tekram.com.tw>
 *  (C) Copyright 1995-1999 Tekram Technology Co., Ltd.
 *
 *  Kurt Garloff <garloff@suse.de>
 *  (C) 1999-2000 Kurt Garloff
 *
 *  Oliver Neukum <oliver@neukum.name>
 *  Ali Akcaagac <aliakc@web.de>
 *  Jamie Lenehan <lenehan@twibble.org>
 *  (C) 2003
 *
 * License: GNU GPL
 *
 *************************************************************************
 *
 * 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.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 ************************************************************************
 */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/ctype.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/vmalloc.h>
#include <asm/io.h>

#include <scsi/scsi.h>
#include <scsi/scsicam.h>     /* needed for scsicam_bios_param */
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>

#include "dc395x.h"

#define DC395X_NAME     "dc395x"
#define DC395X_BANNER   "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040"
#define DC395X_VERSION  "v2.05, 2004/03/08"

/*---------------------------------------------------------------------------
                                  Features
 ---------------------------------------------------------------------------*/
/*
 * Set to disable parts of the driver
 */
/*#define DC395x_NO_DISCONNECT*/
/*#define DC395x_NO_TAGQ*/
/*#define DC395x_NO_SYNC*/
/*#define DC395x_NO_WIDE*/

/*---------------------------------------------------------------------------
                                  Debugging
 ---------------------------------------------------------------------------*/
/*
 * Types of debugging that can be enabled and disabled
 */
#define DBG_KG          0x0001
#define DBG_0           0x0002
#define DBG_1           0x0004
#define DBG_SG          0x0020
#define DBG_FIFO  0x0040
#define DBG_PIO         0x0080


/*
 * Set set of things to output debugging for.
 * Undefine to remove all debugging
 */
/*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/
/*#define  DEBUG_MASK   DBG_0*/


/*
 * Output a kernel mesage at the specified level and append the
 * driver name and a ": " to the start of the message
 */
#define dprintkl(level, format, arg...)  \
    printk(level DC395X_NAME ": " format , ## arg)


#ifdef DEBUG_MASK
/*
 * print a debug message - this is formated with KERN_DEBUG, then the
 * driver name followed by a ": " and then the message is output. 
 * This also checks that the specified debug level is enabled before
 * outputing the message
 */
#define dprintkdbg(type, format, arg...) \
      do { \
            if ((type) & (DEBUG_MASK)) \
                  dprintkl(KERN_DEBUG , format , ## arg); \
      } while (0)

/*
 * Check if the specified type of debugging is enabled
 */
#define debug_enabled(type)   ((DEBUG_MASK) & (type))

#else
/*
 * No debugging. Do nothing
 */
#define dprintkdbg(type, format, arg...) \
      do {} while (0)
#define debug_enabled(type)   (0)

#endif


#ifndef PCI_VENDOR_ID_TEKRAM
#define PCI_VENDOR_ID_TEKRAM                    0x1DE1      /* Vendor ID    */
#endif
#ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040
#define PCI_DEVICE_ID_TEKRAM_TRMS1040           0x0391      /* Device ID    */
#endif


#define DC395x_LOCK_IO(dev,flags)         spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags)
#define DC395x_UNLOCK_IO(dev,flags)       spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags)

#define DC395x_read8(acb,address)         (u8)(inb(acb->io_port_base + (address)))
#define DC395x_read16(acb,address)        (u16)(inw(acb->io_port_base + (address)))
#define DC395x_read32(acb,address)        (u32)(inl(acb->io_port_base + (address)))
#define DC395x_write8(acb,address,value)  outb((value), acb->io_port_base + (address))
#define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address))
#define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address))

/* cmd->result */
#define RES_TARGET            0x000000FF  /* Target State */
#define RES_TARGET_LNX  STATUS_MASK /* Only official ... */
#define RES_ENDMSG            0x0000FF00  /* End Message */
#define RES_DID               0x00FF0000  /* DID_ codes */
#define RES_DRV               0xFF000000  /* DRIVER_ codes */

#define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt))
#define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1)

#define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); }
#define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; }
#define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; }
#define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; }
#define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; }

#define TAG_NONE 255

/*
 * srb->segement_x is the hw sg list. It is always allocated as a
 * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not
 * cross a page boundy.
 */
#define SEGMENTX_LEN    (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY)


struct SGentry {
      u32 address;            /* bus! address */
      u32 length;
};

/* The SEEPROM structure for TRM_S1040 */
struct NVRamTarget {
      u8 cfg0;          /* Target configuration byte 0  */
      u8 period;        /* Target period                */
      u8 cfg2;          /* Target configuration byte 2  */
      u8 cfg3;          /* Target configuration byte 3  */
};

struct NvRamType {
      u8 sub_vendor_id[2];    /* 0,1  Sub Vendor ID   */
      u8 sub_sys_id[2]; /* 2,3  Sub System ID   */
      u8 sub_class;           /* 4    Sub Class       */
      u8 vendor_id[2];  /* 5,6  Vendor ID       */
      u8 device_id[2];  /* 7,8  Device ID       */
      u8 reserved;            /* 9    Reserved        */
      struct NVRamTarget target[DC395x_MAX_SCSI_ID];
                                    /** 10,11,12,13
                                     ** 14,15,16,17
                                     ** ....
                                     ** ....
                                     ** 70,71,72,73
                                     */
      u8 scsi_id;       /* 74 Host Adapter SCSI ID      */
      u8 channel_cfg;         /* 75 Channel configuration     */
      u8 delay_time;          /* 76 Power on delay time       */
      u8 max_tag;       /* 77 Maximum tags              */
      u8 reserved0;           /* 78  */
      u8 boot_target;         /* 79  */
      u8 boot_lun;            /* 80  */
      u8 reserved1;           /* 81  */
      u16 reserved2[22];      /* 82,..125 */
      u16 cksum;        /* 126,127 */
};

struct ScsiReqBlk {
      struct list_head list;        /* next/prev ptrs for srb lists */
      struct DeviceCtlBlk *dcb;
      struct scsi_cmnd *cmd;

      struct SGentry *segment_x;    /* Linear array of hw sg entries (up to 64 entries) */
      dma_addr_t sg_bus_addr;         /* Bus address of sg list (ie, of segment_x) */

      u8 sg_count;                  /* No of HW sg entries for this request */
      u8 sg_index;                  /* Index of HW sg entry for this request */
      size_t total_xfer_length;     /* Total number of bytes remaining to be transfered */
      size_t request_length;        /* Total number of bytes in this request */
      /*
       * The sense buffer handling function, request_sense, uses
       * the first hw sg entry (segment_x[0]) and the transfer
       * length (total_xfer_length). While doing this it stores the
       * original values into the last sg hw list
       * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the
       * total_xfer_length in xferred. These values are restored in
       * pci_unmap_srb_sense. This is the only place xferred is used.
       */
      size_t xferred;                 /* Saved copy of total_xfer_length */

      u16 state;

      u8 msgin_buf[6];
      u8 msgout_buf[6];

      u8 adapter_status;
      u8 target_status;
      u8 msg_count;
      u8 end_message;

      u8 tag_number;
      u8 status;
      u8 retry_count;
      u8 flag;

      u8 scsi_phase;
};

struct DeviceCtlBlk {
      struct list_head list;        /* next/prev ptrs for the dcb list */
      struct AdapterCtlBlk *acb;
      struct list_head srb_going_list;    /* head of going srb list */
      struct list_head srb_waiting_list;  /* head of waiting srb list */

      struct ScsiReqBlk *active_srb;
      u32 tag_mask;

      u16 max_command;

      u8 target_id;           /* SCSI Target ID  (SCSI Only) */
      u8 target_lun;          /* SCSI Log.  Unit (SCSI Only) */
      u8 identify_msg;
      u8 dev_mode;

      u8 inquiry7;            /* To store Inquiry flags */
      u8 sync_mode;           /* 0:async mode */
      u8 min_nego_period;     /* for nego. */
      u8 sync_period;         /* for reg.  */

      u8 sync_offset;         /* for reg. and nego.(low nibble) */
      u8 flag;
      u8 dev_type;
      u8 init_tcq_flag;
};

struct AdapterCtlBlk {
      struct Scsi_Host *scsi_host;

      unsigned long io_port_base;
      unsigned long io_port_len;

      struct list_head dcb_list;          /* head of going dcb list */
      struct DeviceCtlBlk *dcb_run_robin;
      struct DeviceCtlBlk *active_dcb;

      struct list_head srb_free_list;           /* head of free srb list */
      struct ScsiReqBlk *tmp_srb;
      struct timer_list waiting_timer;
      struct timer_list selto_timer;

      u16 srb_count;

      u8 sel_timeout;

      unsigned int irq_level;
      u8 tag_max_num;
      u8 acb_flag;
      u8 gmode2;

      u8 config;
      u8 lun_chk;
      u8 scan_devices;
      u8 hostid_bit;

      u8 dcb_map[DC395x_MAX_SCSI_ID];
      struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32];

      struct pci_dev *dev;

      u8 msg_len;

      struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT];
      struct ScsiReqBlk srb;

      struct NvRamType eeprom;      /* eeprom settings for this adapter */
};


/*---------------------------------------------------------------------------
                            Forward declarations
 ---------------------------------------------------------------------------*/
static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status);
static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, 
            u16 *pscsi_status);
static void set_basic_config(struct AdapterCtlBlk *acb);
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb);
static void reset_scsi_bus(struct AdapterCtlBlk *acb);
static void data_io_transfer(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb, u16 io_dir);
static void disconnect(struct AdapterCtlBlk *acb);
static void reselect(struct AdapterCtlBlk *acb);
static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb);
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb);
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb);
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code,
            struct scsi_cmnd *cmd, u8 force);
static void scsi_reset_detect(struct AdapterCtlBlk *acb);
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb);
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb);
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb);
static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb);
static void set_xfer_rate(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb);
static void waiting_timeout(unsigned long ptr);


/*---------------------------------------------------------------------------
                                 Static Data
 ---------------------------------------------------------------------------*/
static u16 current_sync_offset = 0;

static void *dc395x_scsi_phase0[] = {
      data_out_phase0,/* phase:0 */
      data_in_phase0,   /* phase:1 */
      command_phase0,   /* phase:2 */
      status_phase0,    /* phase:3 */
      nop0,       /* phase:4 PH_BUS_FREE .. initial phase */
      nop0,       /* phase:5 PH_BUS_FREE .. initial phase */
      msgout_phase0,    /* phase:6 */
      msgin_phase0,     /* phase:7 */
};

static void *dc395x_scsi_phase1[] = {
      data_out_phase1,/* phase:0 */
      data_in_phase1,   /* phase:1 */
      command_phase1,   /* phase:2 */
      status_phase1,    /* phase:3 */
      nop1,       /* phase:4 PH_BUS_FREE .. initial phase */
      nop1,       /* phase:5 PH_BUS_FREE .. initial phase */
      msgout_phase1,    /* phase:6 */
      msgin_phase1,     /* phase:7 */
};

/*
 *Fast20:   000    50ns, 20.0 MHz
 *          001    75ns, 13.3 MHz
 *          010   100ns, 10.0 MHz
 *          011   125ns,  8.0 MHz
 *          100   150ns,  6.6 MHz
 *          101   175ns,  5.7 MHz
 *          110   200ns,  5.0 MHz
 *          111   250ns,  4.0 MHz
 *
 *Fast40(LVDS):   000    25ns, 40.0 MHz
 *          001    50ns, 20.0 MHz
 *          010    75ns, 13.3 MHz
 *          011   100ns, 10.0 MHz
 *          100   125ns,  8.0 MHz
 *          101   150ns,  6.6 MHz
 *          110   175ns,  5.7 MHz
 *          111   200ns,  5.0 MHz
 */
/*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/

/* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */
static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 };
static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 };


/*---------------------------------------------------------------------------
                                Configuration
  ---------------------------------------------------------------------------*/
/*
 * Module/boot parameters currently effect *all* instances of the
 * card in the system.
 */

/*
 * Command line parameters are stored in a structure below.
 * These are the index's into the structure for the various
 * command line options.
 */
#define CFG_ADAPTER_ID        0
#define CFG_MAX_SPEED         1
#define CFG_DEV_MODE          2
#define CFG_ADAPTER_MODE      3
#define CFG_TAGS        4
#define CFG_RESET_DELAY       5

#define CFG_NUM               6     /* number of configuration items */


/*
 * Value used to indicate that a command line override
 * hasn't been used to modify the value.
 */
#define CFG_PARAM_UNSET -1


/*
 * Hold command line parameters.
 */
struct ParameterData {
      int value;        /* value of this setting */
      int min;          /* minimum value */
      int max;          /* maximum value */
      int def;          /* default value */
      int safe;         /* safe value */
};
static struct ParameterData __devinitdata cfg_data[] = {
      { /* adapter id */
            CFG_PARAM_UNSET,
            0,
            15,
            7,
            7
      },
      { /* max speed */
            CFG_PARAM_UNSET,
              0,
              7,
              1,  /* 13.3Mhz */
              4,  /*  6.7Hmz */
      },
      { /* dev mode */
            CFG_PARAM_UNSET,
            0,
            0x3f,
            NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO |
                  NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING |
                  NTC_DO_SEND_START,
            NTC_DO_PARITY_CHK | NTC_DO_SEND_START
      },
      { /* adapter mode */
            CFG_PARAM_UNSET,
            0,
            0x2f,
#ifdef CONFIG_SCSI_MULTI_LUN
                  NAC_SCANLUN |
#endif
            NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET
                  /*| NAC_ACTIVE_NEG*/,
            NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08
      },
      { /* tags */
            CFG_PARAM_UNSET,
            0,
            5,
            3,    /* 16 tags (??) */
            2,
      },
      { /* reset delay */
            CFG_PARAM_UNSET,
            0,
            180,
            1,    /* 1 second */
            10,   /* 10 seconds */
      }
};


/*
 * Safe settings. If set to zero the the BIOS/default values with
 * command line overrides will be used. If set to 1 then safe and
 * slow settings will be used.
 */
static int use_safe_settings = 0;
module_param_named(safe, use_safe_settings, bool, 0);
MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false");


module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0);
MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)");

module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0);
MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz");

module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0);
MODULE_PARM_DESC(dev_mode, "Device mode.");

module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0);
MODULE_PARM_DESC(adapter_mode, "Adapter mode.");

module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0);
MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)");

module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0);
MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)");


/**
 * set_safe_settings - if the use_safe_settings option is set then
 * set all values to the safe and slow values.
 **/
static void __devinit set_safe_settings(void)
{
      if (use_safe_settings)
      {
            int i;

            dprintkl(KERN_INFO, "Using safe settings.\n");
            for (i = 0; i < CFG_NUM; i++)
            {
                  cfg_data[i].value = cfg_data[i].safe;
            }
      }
}


/**
 * fix_settings - reset any boot parameters which are out of range
 * back to the default values.
 **/
static void __devinit fix_settings(void)
{
      int i;

      dprintkdbg(DBG_1,
            "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x "
            "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n",
            cfg_data[CFG_ADAPTER_ID].value,
            cfg_data[CFG_MAX_SPEED].value,
            cfg_data[CFG_DEV_MODE].value,
            cfg_data[CFG_ADAPTER_MODE].value,
            cfg_data[CFG_TAGS].value,
            cfg_data[CFG_RESET_DELAY].value);
      for (i = 0; i < CFG_NUM; i++)
      {
            if (cfg_data[i].value < cfg_data[i].min
                || cfg_data[i].value > cfg_data[i].max)
                  cfg_data[i].value = cfg_data[i].def;
      }
}



/*
 * Mapping from the eeprom delay index value (index into this array)
 * to the the number of actual seconds that the delay should be for.
 */
static char __devinitdata eeprom_index_to_delay_map[] = 
      { 1, 3, 5, 10, 16, 30, 60, 120 };


/**
 * eeprom_index_to_delay - Take the eeprom delay setting and convert it
 * into a number of seconds.
 *
 * @eeprom: The eeprom structure in which we find the delay index to map.
 **/
static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom)
{
      eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time];
}


/**
 * delay_to_eeprom_index - Take a delay in seconds and return the
 * closest eeprom index which will delay for at least that amount of
 * seconds.
 *
 * @delay: The delay, in seconds, to find the eeprom index for.
 **/
static int __devinit delay_to_eeprom_index(int delay)
{
      u8 idx = 0;
      while (idx < 7 && eeprom_index_to_delay_map[idx] < delay)
            idx++;
      return idx;
}


/**
 * eeprom_override - Override the eeprom settings, in the provided
 * eeprom structure, with values that have been set on the command
 * line.
 *
 * @eeprom: The eeprom data to override with command line options.
 **/
static void __devinit eeprom_override(struct NvRamType *eeprom)
{
      u8 id;

      /* Adapter Settings */
      if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET)
            eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value;

      if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET)
            eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value;

      if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET)
            eeprom->delay_time = delay_to_eeprom_index(
                              cfg_data[CFG_RESET_DELAY].value);

      if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET)
            eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value;

      /* Device Settings */
      for (id = 0; id < DC395x_MAX_SCSI_ID; id++) {
            if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET)
                  eeprom->target[id].cfg0 =
                        (u8)cfg_data[CFG_DEV_MODE].value;

            if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET)
                  eeprom->target[id].period =
                        (u8)cfg_data[CFG_MAX_SPEED].value;

      }
}


/*---------------------------------------------------------------------------
 ---------------------------------------------------------------------------*/

static unsigned int list_size(struct list_head *head)
{
      unsigned int count = 0;
      struct list_head *pos;
      list_for_each(pos, head)
            count++;
      return count;
}


static struct DeviceCtlBlk *dcb_get_next(struct list_head *head,
            struct DeviceCtlBlk *pos)
{
      int use_next = 0;
      struct DeviceCtlBlk* next = NULL;
      struct DeviceCtlBlk* i;

      if (list_empty(head))
            return NULL;

      /* find supplied dcb and then select the next one */
      list_for_each_entry(i, head, list)
            if (use_next) {
                  next = i;
                  break;
            } else if (i == pos) {
                  use_next = 1;
            }
      /* if no next one take the head one (ie, wraparound) */
      if (!next)
            list_for_each_entry(i, head, list) {
                  next = i;
                  break;
            }

      return next;
}


static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
      if (srb->tag_number < 255) {
            dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */
            srb->tag_number = 255;
      }
}


/* Find cmd in SRB list */
static inline struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd,
            struct list_head *head)
{
      struct ScsiReqBlk *i;
      list_for_each_entry(i, head, list)
            if (i->cmd == cmd)
                  return i;
      return NULL;
}


static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb)
{
      struct list_head *head = &acb->srb_free_list;
      struct ScsiReqBlk *srb = NULL;

      if (!list_empty(head)) {
            srb = list_entry(head->next, struct ScsiReqBlk, list);
            list_del(head->next);
            dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb);
      }
      return srb;
}


static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb);
      list_add_tail(&srb->list, &acb->srb_free_list);
}


static void srb_waiting_insert(struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
      list_add(&srb->list, &dcb->srb_waiting_list);
}


static void srb_waiting_append(struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n",
             srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
      list_add_tail(&srb->list, &dcb->srb_waiting_list);
}


static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
      list_add_tail(&srb->list, &dcb->srb_going_list);
}


static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
      struct ScsiReqBlk *i;
      struct ScsiReqBlk *tmp;
      dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

      list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list)
            if (i == srb) {
                  list_del(&srb->list);
                  break;
            }
}


static void srb_waiting_remove(struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      struct ScsiReqBlk *i;
      struct ScsiReqBlk *tmp;
      dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

      list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list)
            if (i == srb) {
                  list_del(&srb->list);
                  break;
            }
}


static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0,
            "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
      list_move(&srb->list, &dcb->srb_waiting_list);
}


static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      dprintkdbg(DBG_0,
            "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);
      list_move(&srb->list, &dcb->srb_going_list);
}


/* Sets the timer to wake us up */
static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to)
{
      if (timer_pending(&acb->waiting_timer))
            return;
      init_timer(&acb->waiting_timer);
      acb->waiting_timer.function = waiting_timeout;
      acb->waiting_timer.data = (unsigned long) acb;
      if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2))
            acb->waiting_timer.expires =
                acb->scsi_host->last_reset - HZ / 2 + 1;
      else
            acb->waiting_timer.expires = jiffies + to + 1;
      add_timer(&acb->waiting_timer);
}


/* Send the next command from the waiting list to the bus */
static void waiting_process_next(struct AdapterCtlBlk *acb)
{
      struct DeviceCtlBlk *start = NULL;
      struct DeviceCtlBlk *pos;
      struct DeviceCtlBlk *dcb;
      struct ScsiReqBlk *srb;
      struct list_head *dcb_list_head = &acb->dcb_list;

      if (acb->active_dcb
          || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV)))
            return;

      if (timer_pending(&acb->waiting_timer))
            del_timer(&acb->waiting_timer);

      if (list_empty(dcb_list_head))
            return;

      /*
       * Find the starting dcb. Need to find it again in the list
       * since the list may have changed since we set the ptr to it
       */
      list_for_each_entry(dcb, dcb_list_head, list)
            if (dcb == acb->dcb_run_robin) {
                  start = dcb;
                  break;
            }
      if (!start) {
            /* This can happen! */
            start = list_entry(dcb_list_head->next, typeof(*start), list);
            acb->dcb_run_robin = start;
      }


      /*
       * Loop over the dcb, but we start somewhere (potentially) in
       * the middle of the loop so we need to manully do this.
       */
      pos = start;
      do {
            struct list_head *waiting_list_head = &pos->srb_waiting_list;

            /* Make sure, the next another device gets scheduled ... */
            acb->dcb_run_robin = dcb_get_next(dcb_list_head,
                                      acb->dcb_run_robin);

            if (list_empty(waiting_list_head) ||
                pos->max_command <= list_size(&pos->srb_going_list)) {
                  /* move to next dcb */
                  pos = dcb_get_next(dcb_list_head, pos);
            } else {
                  srb = list_entry(waiting_list_head->next,
                               struct ScsiReqBlk, list);

                  /* Try to send to the bus */
                  if (!start_scsi(acb, pos, srb))
                        srb_waiting_to_going_move(pos, srb);
                  else
                        waiting_set_timer(acb, HZ/50);
                  break;
            }
      } while (pos != start);
}


/* Wake up waiting queue */
static void waiting_timeout(unsigned long ptr)
{
      unsigned long flags;
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
      dprintkdbg(DBG_1,
            "waiting_timeout: Queue woken up by timer. acb=%p\n", acb);
      DC395x_LOCK_IO(acb->scsi_host, flags);
      waiting_process_next(acb);
      DC395x_UNLOCK_IO(acb->scsi_host, flags);
}


/* Get the DCB for a given ID/LUN combination */
static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun)
{
      return acb->children[id][lun];
}


/* Send SCSI Request Block (srb) to adapter (acb) */
static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      struct DeviceCtlBlk *dcb = srb->dcb;

      if (dcb->max_command <= list_size(&dcb->srb_going_list) ||
          acb->active_dcb ||
          (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) {
            srb_waiting_append(dcb, srb);
            waiting_process_next(acb);
            return;
      }

      if (!start_scsi(acb, dcb, srb))
            srb_going_append(dcb, srb);
      else {
            srb_waiting_insert(dcb, srb);
            waiting_set_timer(acb, HZ / 50);
      }
}

/* Prepare SRB for being sent to Device DCB w/ command *cmd */
static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      enum dma_data_direction dir = cmd->sc_data_direction;
      dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n",
            cmd->pid, dcb->target_id, dcb->target_lun);

      srb->dcb = dcb;
      srb->cmd = cmd;
      srb->sg_count = 0;
      srb->total_xfer_length = 0;
      srb->sg_bus_addr = 0;
      srb->sg_index = 0;
      srb->adapter_status = 0;
      srb->target_status = 0;
      srb->msg_count = 0;
      srb->status = 0;
      srb->flag = 0;
      srb->state = 0;
      srb->retry_count = 0;
      srb->tag_number = TAG_NONE;
      srb->scsi_phase = PH_BUS_FREE;      /* initial phase */
      srb->end_message = 0;

      if (dir == PCI_DMA_NONE || !cmd->request_buffer) {
            dprintkdbg(DBG_0,
                  "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n",
                  cmd->bufflen, cmd->request_buffer,
                  cmd->use_sg, srb->segment_x[0].address);
      } else if (cmd->use_sg) {
            int i;
            u32 reqlen = cmd->request_bufflen;
            struct scatterlist *sl = (struct scatterlist *)
                               cmd->request_buffer;
            struct SGentry *sgp = srb->segment_x;
            srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg,
                                 dir);
            dprintkdbg(DBG_0,
                  "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n",
                  reqlen, cmd->request_buffer, cmd->use_sg,
                  srb->sg_count);

            for (i = 0; i < srb->sg_count; i++) {
                  u32 busaddr = (u32)sg_dma_address(&sl[i]);
                  u32 seglen = (u32)sl[i].length;
                  sgp[i].address = busaddr;
                  sgp[i].length = seglen;
                  srb->total_xfer_length += seglen;
            }
            sgp += srb->sg_count - 1;

            /*
             * adjust last page if too big as it is allocated
             * on even page boundaries
             */
            if (srb->total_xfer_length > reqlen) {
                  sgp->length -= (srb->total_xfer_length - reqlen);
                  srb->total_xfer_length = reqlen;
            }

            /* Fixup for WIDE padding - make sure length is even */
            if (dcb->sync_period & WIDE_SYNC &&
                srb->total_xfer_length % 2) {
                  srb->total_xfer_length++;
                  sgp->length++;
            }

            srb->sg_bus_addr = pci_map_single(dcb->acb->dev,
                                    srb->segment_x,
                                          SEGMENTX_LEN,
                                          PCI_DMA_TODEVICE);

            dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n",
                  srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN);
      } else {
            srb->total_xfer_length = cmd->request_bufflen;
            srb->sg_count = 1;
            srb->segment_x[0].address =
                  pci_map_single(dcb->acb->dev, cmd->request_buffer,
                               srb->total_xfer_length, dir);

            /* Fixup for WIDE padding - make sure length is even */
            if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2)
                  srb->total_xfer_length++;

            srb->segment_x[0].length = srb->total_xfer_length;

            dprintkdbg(DBG_0,
                  "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n",
                  srb->total_xfer_length, cmd->request_buffer,
                  cmd->use_sg, srb->segment_x[0].address);
      }

      srb->request_length = srb->total_xfer_length;
}


/**
 * dc395x_queue_command - queue scsi command passed from the mid
 * layer, invoke 'done' on completion
 *
 * @cmd: pointer to scsi command object
 * @done: function pointer to be invoked on completion
 *
 * Returns 1 if the adapter (host) is busy, else returns 0. One
 * reason for an adapter to be busy is that the number
 * of outstanding queued commands is already equal to
 * struct Scsi_Host::can_queue .
 *
 * Required: if struct Scsi_Host::can_queue is ever non-zero
 *           then this function is required.
 *
 * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave")
 *        and is expected to be held on return.
 *
 **/
static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
      struct DeviceCtlBlk *dcb;
      struct ScsiReqBlk *srb;
      struct AdapterCtlBlk *acb =
          (struct AdapterCtlBlk *)cmd->device->host->hostdata;
      dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n",
            cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);

      /* Assume BAD_TARGET; will be cleared later */
      cmd->result = DID_BAD_TARGET << 16;

      /* ignore invalid targets */
      if (cmd->device->id >= acb->scsi_host->max_id ||
          cmd->device->lun >= acb->scsi_host->max_lun ||
          cmd->device->lun >31) {
            goto complete;
      }

      /* does the specified lun on the specified device exist */
      if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) {
            dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n",
                  cmd->device->id, cmd->device->lun);
            goto complete;
      }

      /* do we have a DCB for the device */
      dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
      if (!dcb) {
            /* should never happen */
            dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>",
                  cmd->device->id, cmd->device->lun);
            goto complete;
      }

      /* set callback and clear result in the command */
      cmd->scsi_done = done;
      cmd->result = 0;

      srb = srb_get_free(acb);
      if (!srb)
      {
            /*
             * Return 1 since we are unable to queue this command at this
             * point in time.
             */
            dprintkdbg(DBG_0, "queue_command: No free srb's\n");
            return 1;
      }

      build_srb(cmd, dcb, srb);

      if (!list_empty(&dcb->srb_waiting_list)) {
            /* append to waiting queue */
            srb_waiting_append(dcb, srb);
            waiting_process_next(acb);
      } else {
            /* process immediately */
            send_srb(acb, srb);
      }
      dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid);
      return 0;

complete:
      /*
       * Complete the command immediatey, and then return 0 to
       * indicate that we have handled the command. This is usually
       * done when the commad is for things like non existent
       * devices.
       */
      done(cmd);
      return 0;
}


/*
 * Return the disk geometry for the given SCSI device.
 */
static int dc395x_bios_param(struct scsi_device *sdev,
            struct block_device *bdev, sector_t capacity, int *info)
{
#ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP
      int heads, sectors, cylinders;
      struct AdapterCtlBlk *acb;
      int size = capacity;

      dprintkdbg(DBG_0, "dc395x_bios_param..............\n");
      acb = (struct AdapterCtlBlk *)sdev->host->hostdata;
      heads = 64;
      sectors = 32;
      cylinders = size / (heads * sectors);

      if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) {
            heads = 255;
            sectors = 63;
            cylinders = size / (heads * sectors);
      }
      geom[0] = heads;
      geom[1] = sectors;
      geom[2] = cylinders;
      return 0;
#else
      return scsicam_bios_param(bdev, capacity, info);
#endif
}


static void dump_register_info(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb)
{
      u16 pstat;
      struct pci_dev *dev = acb->dev;
      pci_read_config_word(dev, PCI_STATUS, &pstat);
      if (!dcb)
            dcb = acb->active_dcb;
      if (!srb && dcb)
            srb = dcb->active_srb;
      if (srb) {
            if (!srb->cmd)
                  dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n",
                        srb, srb->cmd);
            else
                  dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) "
                         "cmnd=0x%02x <%02i-%i>\n",
                        srb, srb->cmd, srb->cmd->pid,
                        srb->cmd->cmnd[0], srb->cmd->device->id,
                              srb->cmd->device->lun);
            printk("  sglist=%p cnt=%i idx=%i len=%i\n",
                   srb->segment_x, srb->sg_count, srb->sg_index,
                   srb->total_xfer_length);
            printk("  state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n",
                   srb->state, srb->status, srb->scsi_phase,
                   (acb->active_dcb) ? "" : "not");
      }
      dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x "
            "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x "
            "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x "
            "config2=0x%02x cmd=0x%02x selto=0x%02x}\n",
            DC395x_read16(acb, TRM_S1040_SCSI_STATUS),
            DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
            DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL),
            DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS),
            DC395x_read8(acb, TRM_S1040_SCSI_SYNC),
            DC395x_read8(acb, TRM_S1040_SCSI_TARGETID),
            DC395x_read8(acb, TRM_S1040_SCSI_IDMSG),
            DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
            DC395x_read8(acb, TRM_S1040_SCSI_INTEN),
            DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0),
            DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2),
            DC395x_read8(acb, TRM_S1040_SCSI_COMMAND),
            DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT));
      dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x "
            "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x "
            "ctctr=0x%08x addr=0x%08x:0x%08x}\n",
            DC395x_read16(acb, TRM_S1040_DMA_COMMAND),
            DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
            DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
            DC395x_read8(acb, TRM_S1040_DMA_STATUS),
            DC395x_read8(acb, TRM_S1040_DMA_INTEN),
            DC395x_read16(acb, TRM_S1040_DMA_CONFIG),
            DC395x_read32(acb, TRM_S1040_DMA_XCNT),
            DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
            DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR),
            DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR));
      dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} "
            "pci{status=0x%04x}\n",
            DC395x_read8(acb, TRM_S1040_GEN_CONTROL),
            DC395x_read8(acb, TRM_S1040_GEN_STATUS),
            DC395x_read8(acb, TRM_S1040_GEN_TIMER),
            pstat);
}


static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt)
{
#if debug_enabled(DBG_FIFO)
      u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
      u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
      if (!(fifocnt & 0x40))
            dprintkdbg(DBG_FIFO,
                  "clear_fifo: (%i bytes) on phase %02x in %s\n",
                  fifocnt & 0x3f, lines, txt);
#endif
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO);
}


static void reset_dev_param(struct AdapterCtlBlk *acb)
{
      struct DeviceCtlBlk *dcb;
      struct NvRamType *eeprom = &acb->eeprom;
      dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb);

      list_for_each_entry(dcb, &acb->dcb_list, list) {
            u8 period_index;

            dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE);
            dcb->sync_period = 0;
            dcb->sync_offset = 0;

            dcb->dev_mode = eeprom->target[dcb->target_id].cfg0;
            period_index = eeprom->target[dcb->target_id].period & 0x07;
            dcb->min_nego_period = clock_period[period_index];
            if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO)
                || !(acb->config & HCC_WIDE_CARD))
                  dcb->sync_mode &= ~WIDE_NEGO_ENABLE;
      }
}


/*
 * perform a hard reset on the SCSI bus
 * @cmd - some command for this host (for fetching hooks)
 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
 */
static int __dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
      struct AdapterCtlBlk *acb =
            (struct AdapterCtlBlk *)cmd->device->host->hostdata;
      dprintkl(KERN_INFO,
            "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n",
            cmd->pid, cmd->device->id, cmd->device->lun, cmd);

      if (timer_pending(&acb->waiting_timer))
            del_timer(&acb->waiting_timer);

      /*
       * disable interrupt    
       */
      DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
      DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);
      DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
      DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);

      reset_scsi_bus(acb);
      udelay(500);

      /* We may be in serious trouble. Wait some seconds */
      acb->scsi_host->last_reset =
          jiffies + 3 * HZ / 2 +
          HZ * acb->eeprom.delay_time;

      /*
       * re-enable interrupt      
       */
      /* Clear SCSI FIFO          */
      DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
      clear_fifo(acb, "eh_bus_reset");
      /* Delete pending IRQ */
      DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
      set_basic_config(acb);

      reset_dev_param(acb);
      doing_srb_done(acb, DID_RESET, cmd, 0);
      acb->active_dcb = NULL;
      acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE ,RESET_DEV */
      waiting_process_next(acb);

      return SUCCESS;
}

static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd)
{
      int rc;

      spin_lock_irq(cmd->device->host->host_lock);
      rc = __dc395x_eh_bus_reset(cmd);
      spin_unlock_irq(cmd->device->host->host_lock);

      return rc;
}

/*
 * abort an errant SCSI command
 * @cmd - command to be aborted
 * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003).
 */
static int dc395x_eh_abort(struct scsi_cmnd *cmd)
{
      /*
       * Look into our command queues: If it has not been sent already,
       * we remove it and return success. Otherwise fail.
       */
      struct AdapterCtlBlk *acb =
          (struct AdapterCtlBlk *)cmd->device->host->hostdata;
      struct DeviceCtlBlk *dcb;
      struct ScsiReqBlk *srb;
      dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n",
            cmd->pid, cmd->device->id, cmd->device->lun, cmd);

      dcb = find_dcb(acb, cmd->device->id, cmd->device->lun);
      if (!dcb) {
            dprintkl(KERN_DEBUG, "eh_abort: No such device\n");
            return FAILED;
      }

      srb = find_cmd(cmd, &dcb->srb_waiting_list);
      if (srb) {
            srb_waiting_remove(dcb, srb);
            pci_unmap_srb_sense(acb, srb);
            pci_unmap_srb(acb, srb);
            free_tag(dcb, srb);
            srb_free_insert(acb, srb);
            dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n");
            cmd->result = DID_ABORT << 16;
            return SUCCESS;
      }
      srb = find_cmd(cmd, &dcb->srb_going_list);
      if (srb) {
            dprintkl(KERN_DEBUG, "eh_abort: Command in progress\n");
            /* XXX: Should abort the command here */
      } else {
            dprintkl(KERN_DEBUG, "eh_abort: Command not found\n");
      }
      return FAILED;
}


/* SDTR */
static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      u8 *ptr = srb->msgout_buf + srb->msg_count;
      if (srb->msg_count > 1) {
            dprintkl(KERN_INFO,
                  "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n",
                  srb->msg_count, srb->msgout_buf[0],
                  srb->msgout_buf[1]);
            return;
      }
      if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) {
            dcb->sync_offset = 0;
            dcb->min_nego_period = 200 >> 2;
      } else if (dcb->sync_offset == 0)
            dcb->sync_offset = SYNC_NEGO_OFFSET;

      *ptr++ = MSG_EXTENDED;  /* (01h) */
      *ptr++ = 3;       /* length */
      *ptr++ = EXTENDED_SDTR; /* (01h) */
      *ptr++ = dcb->min_nego_period;      /* Transfer period (in 4ns) */
      *ptr++ = dcb->sync_offset;    /* Transfer period (max. REQ/ACK dist) */
      srb->msg_count += 5;
      srb->state |= SRB_DO_SYNC_NEGO;
}


/* WDTR */
static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) &
               (acb->config & HCC_WIDE_CARD)) ? 1 : 0;
      u8 *ptr = srb->msgout_buf + srb->msg_count;
      if (srb->msg_count > 1) {
            dprintkl(KERN_INFO,
                  "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n",
                  srb->msg_count, srb->msgout_buf[0],
                  srb->msgout_buf[1]);
            return;
      }
      *ptr++ = MSG_EXTENDED;  /* (01h) */
      *ptr++ = 2;       /* length */
      *ptr++ = EXTENDED_WDTR; /* (03h) */
      *ptr++ = wide;
      srb->msg_count += 4;
      srb->state |= SRB_DO_WIDE_NEGO;
}


#if 0
/* Timer to work around chip flaw: When selecting and the bus is 
 * busy, we sometimes miss a Selection timeout IRQ */
void selection_timeout_missed(unsigned long ptr);
/* Sets the timer to wake us up */
static void selto_timer(struct AdapterCtlBlk *acb)
{
      if (timer_pending(&acb->selto_timer))
            return;
      acb->selto_timer.function = selection_timeout_missed;
      acb->selto_timer.data = (unsigned long) acb;
      if (time_before
          (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2))
            acb->selto_timer.expires =
                acb->scsi_host->last_reset + HZ / 2 + 1;
      else
            acb->selto_timer.expires = jiffies + HZ + 1;
      add_timer(&acb->selto_timer);
}


void selection_timeout_missed(unsigned long ptr)
{
      unsigned long flags;
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr;
      struct ScsiReqBlk *srb;
      dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n");
      if (!acb->active_dcb || !acb->active_dcb->active_srb) {
            dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n");
            return;
      }
      DC395x_LOCK_IO(acb->scsi_host, flags);
      srb = acb->active_dcb->active_srb;
      disconnect(acb);
      DC395x_UNLOCK_IO(acb->scsi_host, flags);
}
#endif


static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb,
            struct ScsiReqBlk* srb)
{
      u16 s_stat2, return_code;
      u8 s_stat, scsicommand, i, identify_message;
      u8 *ptr;
      dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n",
            srb->cmd->pid, dcb->target_id, dcb->target_lun, srb);

      srb->tag_number = TAG_NONE;   /* acb->tag_max_num: had error read in eeprom */

      s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
      s_stat2 = 0;
      s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
#if 1
      if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) {
            dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n",
                  srb->cmd->pid, s_stat, s_stat2);
            /*
             * Try anyway?
             *
             * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection
             * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed!
             * (This is likely to be a bug in the hardware. Obviously, most people
             *  only have one initiator per SCSI bus.)
             * Instead let this fail and have the timer make sure the command is 
             * tried again after a short time
             */
            /*selto_timer (acb); */
            return 1;
      }
#endif
      if (acb->active_dcb) {
            dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a"
                  "command while another command (pid#%li) is active.",
                  srb->cmd->pid,
                  acb->active_dcb->active_srb ?
                      acb->active_dcb->active_srb->cmd->pid : 0);
            return 1;
      }
      if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
            dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n",
                  srb->cmd->pid);
            return 1;
      }
      /* Allow starting of SCSI commands half a second before we allow the mid-level
       * to queue them again after a reset */
      if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) {
            dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n");
            return 1;
      }

      /* Flush FIFO */
      clear_fifo(acb, "start_scsi");
      DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
      DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
      DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
      DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
      srb->scsi_phase = PH_BUS_FREE;      /* initial phase */

      identify_message = dcb->identify_msg;
      /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */
      /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */
      if (srb->flag & AUTO_REQSENSE)
            identify_message &= 0xBF;

      if (((srb->cmd->cmnd[0] == INQUIRY)
           || (srb->cmd->cmnd[0] == REQUEST_SENSE)
           || (srb->flag & AUTO_REQSENSE))
          && (((dcb->sync_mode & WIDE_NEGO_ENABLE)
             && !(dcb->sync_mode & WIDE_NEGO_DONE))
            || ((dcb->sync_mode & SYNC_NEGO_ENABLE)
                && !(dcb->sync_mode & SYNC_NEGO_DONE)))
          && (dcb->target_lun == 0)) {
            srb->msgout_buf[0] = identify_message;
            srb->msg_count = 1;
            scsicommand = SCMD_SEL_ATNSTOP;
            srb->state = SRB_MSGOUT;
#ifndef SYNC_FIRST
            if (dcb->sync_mode & WIDE_NEGO_ENABLE
                && dcb->inquiry7 & SCSI_INQ_WBUS16) {
                  build_wdtr(acb, dcb, srb);
                  goto no_cmd;
            }
#endif
            if (dcb->sync_mode & SYNC_NEGO_ENABLE
                && dcb->inquiry7 & SCSI_INQ_SYNC) {
                  build_sdtr(acb, dcb, srb);
                  goto no_cmd;
            }
            if (dcb->sync_mode & WIDE_NEGO_ENABLE
                && dcb->inquiry7 & SCSI_INQ_WBUS16) {
                  build_wdtr(acb, dcb, srb);
                  goto no_cmd;
            }
            srb->msg_count = 0;
      }
      /* Send identify message */
      DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message);

      scsicommand = SCMD_SEL_ATN;
      srb->state = SRB_START_;
#ifndef DC395x_NO_TAGQ
      if ((dcb->sync_mode & EN_TAG_QUEUEING)
          && (identify_message & 0xC0)) {
            /* Send Tag message */
            u32 tag_mask = 1;
            u8 tag_number = 0;
            while (tag_mask & dcb->tag_mask
                   && tag_number <= dcb->max_command) {
                  tag_mask = tag_mask << 1;
                  tag_number++;
            }
            if (tag_number >= dcb->max_command) {
                  dprintkl(KERN_WARNING, "start_scsi: (pid#%li) "
                        "Out of tags target=<%02i-%i>)\n",
                        srb->cmd->pid, srb->cmd->device->id,
                        srb->cmd->device->lun);
                  srb->state = SRB_READY;
                  DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
                               DO_HWRESELECT);
                  return 1;
            }
            /* Send Tag id */
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number);
            dcb->tag_mask |= tag_mask;
            srb->tag_number = tag_number;
            scsicommand = SCMD_SEL_ATN3;
            srb->state = SRB_START_;
      }
#endif
/*polling:*/
      /* Send CDB ..command block ......... */
      dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
            srb->cmd->cmnd[0], srb->tag_number);
      if (srb->flag & AUTO_REQSENSE) {
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
                        sizeof(srb->cmd->sense_buffer));
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
      } else {
            ptr = (u8 *)srb->cmd->cmnd;
            for (i = 0; i < srb->cmd->cmd_len; i++)
                  DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
      }
      no_cmd:
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
                   DO_HWRESELECT | DO_DATALATCH);
      if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) {
            /* 
             * If start_scsi return 1:
             * we caught an interrupt (must be reset or reselection ... )
             * : Let's process it first!
             */
            dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n",
                  srb->cmd->pid, dcb->target_id, dcb->target_lun);
            srb->state = SRB_READY;
            free_tag(dcb, srb);
            srb->msg_count = 0;
            return_code = 1;
            /* This IRQ should NOT get lost, as we did not acknowledge it */
      } else {
            /* 
             * If start_scsi returns 0:
             * we know that the SCSI processor is free
             */
            srb->scsi_phase = PH_BUS_FREE;      /* initial phase */
            dcb->active_srb = srb;
            acb->active_dcb = dcb;
            return_code = 0;
            /* it's important for atn stop */
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
                         DO_DATALATCH | DO_HWRESELECT);
            /* SCSI command */
            DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand);
      }
      return return_code;
}


#define DC395x_ENABLE_MSGOUT \
 DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \
 srb->state |= SRB_MSGOUT


/* abort command */
static inline void enable_msgout_abort(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb)
{
      srb->msgout_buf[0] = ABORT;
      srb->msg_count = 1;
      DC395x_ENABLE_MSGOUT;
      srb->state &= ~SRB_MSGIN;
      srb->state |= SRB_MSGOUT;
}


/**
 * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to
 *                           have been triggered for this card.
 *
 * @acb:     a pointer to the adpter control block
 * @scsi_status: the status return when we checked the card
 **/
static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb,
            u16 scsi_status)
{
      struct DeviceCtlBlk *dcb;
      struct ScsiReqBlk *srb;
      u16 phase;
      u8 scsi_intstatus;
      unsigned long flags;
      void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, 
                        u16 *);

      DC395x_LOCK_IO(acb->scsi_host, flags);

      /* This acknowledges the IRQ */
      scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
      if ((scsi_status & 0x2007) == 0x2002)
            dprintkl(KERN_DEBUG,
                  "COP after COP completed? %04x\n", scsi_status);
      if (debug_enabled(DBG_KG)) {
            if (scsi_intstatus & INT_SELTIMEOUT)
                  dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n");
      }
      /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */

      if (timer_pending(&acb->selto_timer))
            del_timer(&acb->selto_timer);

      if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) {
            disconnect(acb);  /* bus free interrupt  */
            goto out_unlock;
      }
      if (scsi_intstatus & INT_RESELECTED) {
            reselect(acb);
            goto out_unlock;
      }
      if (scsi_intstatus & INT_SELECT) {
            dprintkl(KERN_INFO, "Host does not support target mode!\n");
            goto out_unlock;
      }
      if (scsi_intstatus & INT_SCSIRESET) {
            scsi_reset_detect(acb);
            goto out_unlock;
      }
      if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) {
            dcb = acb->active_dcb;
            if (!dcb) {
                  dprintkl(KERN_DEBUG,
                        "Oops: BusService (%04x %02x) w/o ActiveDCB!\n",
                        scsi_status, scsi_intstatus);
                  goto out_unlock;
            }
            srb = dcb->active_srb;
            if (dcb->flag & ABORT_DEV_) {
                  dprintkdbg(DBG_0, "MsgOut Abort Device.....\n");
                  enable_msgout_abort(acb, srb);
            }

            /* software sequential machine */
            phase = (u16)srb->scsi_phase;

            /* 
             * 62037 or 62137
             * call  dc395x_scsi_phase0[]... "phase entry"
             * handle every phase before start transfer
             */
            /* data_out_phase0,     phase:0 */
            /* data_in_phase0,      phase:1 */
            /* command_phase0,      phase:2 */
            /* status_phase0, phase:3 */
            /* nop0,          phase:4 PH_BUS_FREE .. initial phase */
            /* nop0,          phase:5 PH_BUS_FREE .. initial phase */
            /* msgout_phase0, phase:6 */
            /* msgin_phase0,  phase:7 */
            dc395x_statev = dc395x_scsi_phase0[phase];
            dc395x_statev(acb, srb, &scsi_status);

            /* 
             * if there were any exception occured scsi_status
             * will be modify to bus free phase new scsi_status
             * transfer out from ... previous dc395x_statev
             */
            srb->scsi_phase = scsi_status & PHASEMASK;
            phase = (u16)scsi_status & PHASEMASK;

            /* 
             * call  dc395x_scsi_phase1[]... "phase entry" handle
             * every phase to do transfer
             */
            /* data_out_phase1,     phase:0 */
            /* data_in_phase1,      phase:1 */
            /* command_phase1,      phase:2 */
            /* status_phase1, phase:3 */
            /* nop1,          phase:4 PH_BUS_FREE .. initial phase */
            /* nop1,          phase:5 PH_BUS_FREE .. initial phase */
            /* msgout_phase1, phase:6 */
            /* msgin_phase1,  phase:7 */
            dc395x_statev = dc395x_scsi_phase1[phase];
            dc395x_statev(acb, srb, &scsi_status);
      }
      out_unlock:
      DC395x_UNLOCK_IO(acb->scsi_host, flags);
}


static irqreturn_t dc395x_interrupt(int irq, void *dev_id,
            struct pt_regs *regs)
{
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id;
      u16 scsi_status;
      u8 dma_status;
      irqreturn_t handled = IRQ_NONE;

      /*
       * Check for pending interupt
       */
      scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS);
      dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
      if (scsi_status & SCSIINTERRUPT) {
            /* interupt pending - let's process it! */
            dc395x_handle_interrupt(acb, scsi_status);
            handled = IRQ_HANDLED;
      }
      else if (dma_status & 0x20) {
            /* Error from the DMA engine */
            dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status);
#if 0
            dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n");
            if (acb->active_dcb) {
                  acb->active_dcb-> flag |= ABORT_DEV_;
                  if (acb->active_dcb->active_srb)
                        enable_msgout_abort(acb, acb->active_dcb->active_srb);
            }
            DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO);
#else
            dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n");
            acb = NULL;
#endif
            handled = IRQ_HANDLED;
      }

      return handled;
}


static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid);
      if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT))
            *pscsi_status = PH_BUS_FREE;  /*.. initial phase */

      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
      srb->state &= ~SRB_MSGOUT;
}


static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      u16 i;
      u8 *ptr;
      dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid);

      clear_fifo(acb, "msgout_phase1");
      if (!(srb->state & SRB_MSGOUT)) {
            srb->state |= SRB_MSGOUT;
            dprintkl(KERN_DEBUG,
                  "msgout_phase1: (pid#%li) Phase unexpected\n",
                  srb->cmd->pid);   /* So what ? */
      }
      if (!srb->msg_count) {
            dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n",
                  srb->cmd->pid);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP);
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
            DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
            return;
      }
      ptr = (u8 *)srb->msgout_buf;
      for (i = 0; i < srb->msg_count; i++)
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++);
      srb->msg_count = 0;
      if (srb->msgout_buf[0] == MSG_ABORT)
            srb->state = SRB_ABORT_SENT;

      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}


static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid);
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}


static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      struct DeviceCtlBlk *dcb;
      u8 *ptr;
      u16 i;
      dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid);

      clear_fifo(acb, "command_phase1");
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN);
      if (!(srb->flag & AUTO_REQSENSE)) {
            ptr = (u8 *)srb->cmd->cmnd;
            for (i = 0; i < srb->cmd->cmd_len; i++) {
                  DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr);
                  ptr++;
            }
      } else {
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE);
            dcb = acb->active_dcb;
            /* target id */
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5));
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO,
                        sizeof(srb->cmd->sense_buffer));
            DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
      }
      srb->state |= SRB_COMMAND;
      /* it's important for atn stop */
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
      /* SCSI command */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT);
}


/*
 * Verify that the remaining space in the hw sg lists is the same as
 * the count of remaining bytes in srb->total_xfer_length
 */
static void sg_verify_length(struct ScsiReqBlk *srb)
{
      if (debug_enabled(DBG_SG)) {
            unsigned len = 0;
            unsigned idx = srb->sg_index;
            struct SGentry *psge = srb->segment_x + idx;
            for (; idx < srb->sg_count; psge++, idx++)
                  len += psge->length;
            if (len != srb->total_xfer_length)
                  dprintkdbg(DBG_SG,
                         "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n",
                         srb->total_xfer_length, len);
      }                        
}


/*
 * Compute the next Scatter Gather list index and adjust its length
 * and address if necessary
 */
static void sg_update_list(struct ScsiReqBlk *srb, u32 left)
{
      u8 idx;
      u32 xferred = srb->total_xfer_length - left; /* bytes transfered */
      struct SGentry *psge = srb->segment_x + srb->sg_index;

      dprintkdbg(DBG_0,
            "sg_update_list: Transfered %i of %i bytes, %i remain\n",
            xferred, srb->total_xfer_length, left);
      if (xferred == 0) {
            /* nothing to update since we did not transfer any data */
            return;
      }

      sg_verify_length(srb);
      srb->total_xfer_length = left;      /* update remaining count */
      for (idx = srb->sg_index; idx < srb->sg_count; idx++) {
            if (xferred >= psge->length) {
                  /* Complete SG entries done */
                  xferred -= psge->length;
            } else {
                  /* Partial SG entry done */
                  psge->length -= xferred;
                  psge->address += xferred;
                  srb->sg_index = idx;
                  pci_dma_sync_single_for_device(srb->dcb->
                                  acb->dev,
                                  srb->sg_bus_addr,
                                  SEGMENTX_LEN,
                                  PCI_DMA_TODEVICE);
                  break;
            }
            psge++;
      }
      sg_verify_length(srb);
}


/*
 * We have transfered a single byte (PIO mode?) and need to update
 * the count of bytes remaining (total_xfer_length) and update the sg
 * entry to either point to next byte in the current sg entry, or of
 * already at the end to point to the start of the next sg entry
 */
static void sg_subtract_one(struct ScsiReqBlk *srb)
{
      sg_update_list(srb, srb->total_xfer_length - 1);
}


/* 
 * cleanup_after_transfer
 * 
 * Makes sure, DMA and SCSI engine are empty, after the transfer has finished
 * KG: Currently called from  StatusPhase1 ()
 * Should probably also be called from other places
 * Best might be to call it in DataXXPhase0, if new phase will differ 
 */
static void cleanup_after_transfer(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb)
{
      /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */
      if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) {   /* read */
            if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
                  clear_fifo(acb, "cleanup/in");
            if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
                  DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
      } else {          /* write */
            if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80))
                  DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
            if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40))
                  clear_fifo(acb, "cleanup/out");
      }
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);
}


/*
 * Those no of bytes will be transfered w/ PIO through the SCSI FIFO
 * Seems to be needed for unknown reasons; could be a hardware bug :-(
 */
#define DC395x_LASTPIO 4


static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      u16 scsi_status = *pscsi_status;
      u32 d_left_counter = 0;
      dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);

      /*
       * KG: We need to drain the buffers before we draw any conclusions!
       * This means telling the DMA to push the rest into SCSI, telling
       * SCSI to push the rest to the bus.
       * However, the device might have been the one to stop us (phase
       * change), and the data in transit just needs to be accounted so
       * it can be retransmitted.)
       */
      /* 
       * KG: Stop DMA engine pushing more data into the SCSI FIFO
       * If we need more data, the DMA SG list will be freshly set up, anyway
       */
      dprintkdbg(DBG_PIO, "data_out_phase0: "
            "DMA{fifocnt=0x%02x fifostat=0x%02x} "
            "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n",
            DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
            DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
            DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
            DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status,
            srb->total_xfer_length);
      DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO);

      if (!(srb->state & SRB_XFERPAD)) {
            if (scsi_status & PARITYERROR)
                  srb->status |= PARITY_ERROR;

            /*
             * KG: Right, we can't just rely on the SCSI_COUNTER, because this
             * is the no of bytes it got from the DMA engine not the no it 
             * transferred successfully to the device. (And the difference could
             * be as much as the FIFO size, I guess ...)
             */
            if (!(scsi_status & SCSIXFERDONE)) {
                  /*
                   * when data transfer from DMA FIFO to SCSI FIFO
                   * if there was some data left in SCSI FIFO
                   */
                  d_left_counter =
                      (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
                          0x1F);
                  if (dcb->sync_period & WIDE_SYNC)
                        d_left_counter <<= 1;

                  dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n"
                        "SCSI{fifocnt=0x%02x cnt=0x%08x} "
                        "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n",
                        DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
                        (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
                        DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT),
                        DC395x_read32(acb, TRM_S1040_SCSI_COUNTER),
                        DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
                        DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
                        DC395x_read32(acb, TRM_S1040_DMA_CXCNT));
            }
            /*
             * calculate all the residue data that not yet tranfered
             * SCSI transfer counter + left in SCSI FIFO data
             *
             * .....TRM_S1040_SCSI_COUNTER (24bits)
             * The counter always decrement by one for every SCSI byte transfer.
             * .....TRM_S1040_SCSI_FIFOCNT ( 5bits)
             * The counter is SCSI FIFO offset counter (in units of bytes or! words)
             */
            if (srb->total_xfer_length > DC395x_LASTPIO)
                  d_left_counter +=
                      DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);

            /* Is this a good idea? */
            /*clear_fifo(acb, "DOP1"); */
            /* KG: What is this supposed to be useful for? WIDE padding stuff? */
            if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC
                && srb->cmd->request_bufflen % 2) {
                  d_left_counter = 0;
                  dprintkl(KERN_INFO,
                        "data_out_phase0: Discard 1 byte (0x%02x)\n",
                        scsi_status);
            }
            /*
             * KG: Oops again. Same thinko as above: The SCSI might have been
             * faster than the DMA engine, so that it ran out of data.
             * In that case, we have to do just nothing! 
             * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or?
             */
            /*
             * KG: This is nonsense: We have been WRITING data to the bus
             * If the SCSI engine has no bytes left, how should the DMA engine?
             */
            if (d_left_counter == 0) {
                  srb->total_xfer_length = 0;
            } else {
                  /*
                   * if transfer not yet complete
                   * there were some data residue in SCSI FIFO or
                   * SCSI transfer counter not empty
                   */
                  long oldxferred =
                      srb->total_xfer_length - d_left_counter;
                  const int diff =
                      (dcb->sync_period & WIDE_SYNC) ? 2 : 1;
                  sg_update_list(srb, d_left_counter);
                  /* KG: Most ugly hack! Apparently, this works around a chip bug */
                  if ((srb->segment_x[srb->sg_index].length ==
                       diff && srb->cmd->use_sg)
                      || ((oldxferred & ~PAGE_MASK) ==
                        (PAGE_SIZE - diff))
                      ) {
                        dprintkl(KERN_INFO, "data_out_phase0: "
                              "Work around chip bug (%i)?\n", diff);
                        d_left_counter =
                            srb->total_xfer_length - diff;
                        sg_update_list(srb, d_left_counter);
                        /*srb->total_xfer_length -= diff; */
                        /*srb->virt_addr += diff; */
                        /*if (srb->cmd->use_sg) */
                        /*      srb->sg_index++; */
                  }
            }
      }
      if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) {
            cleanup_after_transfer(acb, srb);
      }
}


static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
      clear_fifo(acb, "data_out_phase1");
      /* do prepare before transfer when data out phase */
      data_io_transfer(acb, srb, XFERDATAOUT);
}

static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      u16 scsi_status = *pscsi_status;

      dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);

      /*
       * KG: DataIn is much more tricky than DataOut. When the device is finished
       * and switches to another phase, the SCSI engine should be finished too.
       * But: There might still be bytes left in its FIFO to be fetched by the DMA
       * engine and transferred to memory.
       * We should wait for the FIFOs to be emptied by that (is there any way to 
       * enforce this?) and then stop the DMA engine, because it might think, that
       * there are more bytes to follow. Yes, the device might disconnect prior to
       * having all bytes transferred! 
       * Also we should make sure that all data from the DMA engine buffer's really
       * made its way to the system memory! Some documentation on this would not
       * seem to be a bad idea, actually.
       */
      if (!(srb->state & SRB_XFERPAD)) {
            u32 d_left_counter;
            unsigned int sc, fc;

            if (scsi_status & PARITYERROR) {
                  dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) "
                        "Parity Error\n", srb->cmd->pid);
                  srb->status |= PARITY_ERROR;
            }
            /*
             * KG: We should wait for the DMA FIFO to be empty ...
             * but: it would be better to wait first for the SCSI FIFO and then the
             * the DMA FIFO to become empty? How do we know, that the device not already
             * sent data to the FIFO in a MsgIn phase, eg.?
             */
            if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) {
#if 0
                  int ctr = 6000000;
                  dprintkl(KERN_DEBUG,
                        "DIP0: Wait for DMA FIFO to flush ...\n");
                  /*DC395x_write8  (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */
                  /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */
                  /*DC395x_write8  (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */
                  while (!
                         (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) &
                        0x80) && --ctr);
                  if (ctr < 6000000 - 1)
                        dprintkl(KERN_DEBUG
                               "DIP0: Had to wait for DMA ...\n");
                  if (!ctr)
                        dprintkl(KERN_ERR,
                               "Deadlock in DIP0 waiting for DMA FIFO empty!!\n");
                  /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */
#endif
                  dprintkdbg(DBG_KG, "data_in_phase0: "
                        "DMA{fifocnt=0x%02x fifostat=0x%02x}\n",
                        DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT),
                        DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT));
            }
            /* Now: Check remainig data: The SCSI counters should tell us ... */
            sc = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER);
            fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);
            d_left_counter = sc + ((fc & 0x1f)
                   << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 :
                     0));
            dprintkdbg(DBG_KG, "data_in_phase0: "
                  "SCSI{fifocnt=0x%02x%s ctr=0x%08x} "
                  "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} "
                  "Remain{totxfer=%i scsi_fifo+ctr=%i}\n",
                  fc,
                  (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes",
                  sc,
                  fc,
                  DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT),
                  DC395x_read32(acb, TRM_S1040_DMA_CXCNT),
                  srb->total_xfer_length, d_left_counter);
#if DC395x_LASTPIO
            /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */
            if (d_left_counter
                && srb->total_xfer_length <= DC395x_LASTPIO) {
                  size_t left_io = srb->total_xfer_length;

                  /*u32 addr = (srb->segment_x[srb->sg_index].address); */
                  /*sg_update_list (srb, d_left_counter); */
                  dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) "
                           "for remaining %i bytes:",
                        fc & 0x1f,
                        (srb->dcb->sync_period & WIDE_SYNC) ?
                            "words" : "bytes",
                        srb->total_xfer_length);
                  if (srb->dcb->sync_period & WIDE_SYNC)
                        DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
                                    CFG2_WIDEFIFO);
                  while (left_io) {
                        unsigned char *virt, *base = NULL;
                        unsigned long flags = 0;
                        size_t len = left_io;

                        if (srb->cmd->use_sg) {
                              size_t offset = srb->request_length - left_io;
                              local_irq_save(flags);
                              /* Assumption: it's inside one page as it's at most 4 bytes and
                                 I just assume it's on a 4-byte boundary */
                              base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
                                                     srb->sg_count, &offset, &len);
                              virt = base + offset;
                        } else {
                              virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
                              len = left_io;
                        }
                        left_io -= len;

                        while (len) {
                              u8 byte;
                              byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
                              *virt++ = byte;

                              if (debug_enabled(DBG_PIO))
                                    printk(" %02x", byte);

                              d_left_counter--;
                              sg_subtract_one(srb);

                              len--;

                              fc = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT);

                              if (fc == 0x40) {
                                    left_io = 0;
                                    break;
                              }
                        }

                        WARN_ON((fc != 0x40) == !d_left_counter);

                        if (fc == 0x40 && (srb->dcb->sync_period & WIDE_SYNC)) {
                              /* Read the last byte ... */
                              if (srb->total_xfer_length > 0) {
                                    u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);

                                    *virt++ = byte;
                                    srb->total_xfer_length--;
                                    if (debug_enabled(DBG_PIO))
                                          printk(" %02x", byte);
                              }

                              DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
                        }

                        if (srb->cmd->use_sg) {
                              scsi_kunmap_atomic_sg(base);
                              local_irq_restore(flags);
                        }
                  }
                  /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */
                  /*srb->total_xfer_length = 0; */
                  if (debug_enabled(DBG_PIO))
                        printk("\n");
            }
#endif                        /* DC395x_LASTPIO */

#if 0
            /*
             * KG: This was in DATAOUT. Does it also belong here?
             * Nobody seems to know what counter and fifo_cnt count exactly ...
             */
            if (!(scsi_status & SCSIXFERDONE)) {
                  /*
                   * when data transfer from DMA FIFO to SCSI FIFO
                   * if there was some data left in SCSI FIFO
                   */
                  d_left_counter =
                      (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) &
                          0x1F);
                  if (srb->dcb->sync_period & WIDE_SYNC)
                        d_left_counter <<= 1;
                  /*
                   * if WIDE scsi SCSI FIFOCNT unit is word !!!
                   * so need to *= 2
                   * KG: Seems to be correct ...
                   */
            }
#endif
            /* KG: This should not be needed any more! */
            if (d_left_counter == 0
                || (scsi_status & SCSIXFERCNT_2_ZERO)) {
#if 0
                  int ctr = 6000000;
                  u8 TempDMAstatus;
                  do {
                        TempDMAstatus =
                            DC395x_read8(acb, TRM_S1040_DMA_STATUS);
                  } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr);
                  if (!ctr)
                        dprintkl(KERN_ERR,
                               "Deadlock in DataInPhase0 waiting for DMA!!\n");
                  srb->total_xfer_length = 0;
#endif
                  srb->total_xfer_length = d_left_counter;
            } else {    /* phase changed */
                  /*
                   * parsing the case:
                   * when a transfer not yet complete 
                   * but be disconnected by target
                   * if transfer not yet complete
                   * there were some data residue in SCSI FIFO or
                   * SCSI transfer counter not empty
                   */
                  sg_update_list(srb, d_left_counter);
            }
      }
      /* KG: The target may decide to disconnect: Empty FIFO before! */
      if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) {
            cleanup_after_transfer(acb, srb);
      }
}


static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
      data_io_transfer(acb, srb, XFERDATAIN);
}


static void data_io_transfer(struct AdapterCtlBlk *acb, 
            struct ScsiReqBlk *srb, u16 io_dir)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      u8 bval;
      dprintkdbg(DBG_0,
            "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun,
            ((io_dir & DMACMD_DIR) ? 'r' : 'w'),
            srb->total_xfer_length, srb->sg_index, srb->sg_count);
      if (srb == acb->tmp_srb)
            dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n");
      if (srb->sg_index >= srb->sg_count) {
            /* can't happen? out of bounds error */
            return;
      }

      if (srb->total_xfer_length > DC395x_LASTPIO) {
            u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS);
            /*
             * KG: What should we do: Use SCSI Cmd 0x90/0x92?
             * Maybe, even ABORTXFER would be appropriate
             */
            if (dma_status & XFERPENDING) {
                  dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! "
                        "Expect trouble!\n");
                  dump_register_info(acb, dcb, srb);
                  DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO);
            }
            /* clear_fifo(acb, "IO"); */
            /* 
             * load what physical address of Scatter/Gather list table
             * want to be transfer
             */
            srb->state |= SRB_DATA_XFER;
            DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0);
            if (srb->cmd->use_sg) { /* with S/G */
                  io_dir |= DMACMD_SG;
                  DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
                               srb->sg_bus_addr +
                               sizeof(struct SGentry) *
                               srb->sg_index);
                  /* load how many bytes in the sg list table */
                  DC395x_write32(acb, TRM_S1040_DMA_XCNT,
                               ((u32)(srb->sg_count -
                                    srb->sg_index) << 3));
            } else {    /* without S/G */
                  io_dir &= ~DMACMD_SG;
                  DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR,
                               srb->segment_x[0].address);
                  DC395x_write32(acb, TRM_S1040_DMA_XCNT,
                               srb->segment_x[0].length);
            }
            /* load total transfer length (24bits) max value 16Mbyte */
            DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
                         srb->total_xfer_length);
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
            if (io_dir & DMACMD_DIR) {    /* read */
                  DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
                              SCMD_DMA_IN);
                  DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
            } else {
                  DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir);
                  DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
                              SCMD_DMA_OUT);
            }

      }
#if DC395x_LASTPIO
      else if (srb->total_xfer_length > 0) {    /* The last four bytes: Do PIO */
            /* 
             * load what physical address of Scatter/Gather list table
             * want to be transfer
             */
            srb->state |= SRB_DATA_XFER;
            /* load total transfer length (24bits) max value 16Mbyte */
            DC395x_write32(acb, TRM_S1040_SCSI_COUNTER,
                         srb->total_xfer_length);
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
            if (io_dir & DMACMD_DIR) {    /* read */
                  DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
                              SCMD_FIFO_IN);
            } else {    /* write */
                  int ln = srb->total_xfer_length;
                  size_t left_io = srb->total_xfer_length;

                  if (srb->dcb->sync_period & WIDE_SYNC)
                        DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
                             CFG2_WIDEFIFO);

                  while (left_io) {
                        unsigned char *virt, *base = NULL;
                        unsigned long flags = 0;
                        size_t len = left_io;

                        if (srb->cmd->use_sg) {
                              size_t offset = srb->request_length - left_io;
                              local_irq_save(flags);
                              /* Again, max 4 bytes */
                              base = scsi_kmap_atomic_sg((struct scatterlist *)srb->cmd->request_buffer,
                                                     srb->sg_count, &offset, &len);
                              virt = base + offset;
                        } else {
                              virt = srb->cmd->request_buffer + srb->cmd->request_bufflen - left_io;
                              len = left_io;
                        }
                        left_io -= len;

                        while (len--) {
                              if (debug_enabled(DBG_PIO))
                                    printk(" %02x", *virt);

                              DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *virt++);

                              sg_subtract_one(srb);
                        }

                        if (srb->cmd->use_sg) {
                              scsi_kunmap_atomic_sg(base);
                              local_irq_restore(flags);
                        }
                  }
                  if (srb->dcb->sync_period & WIDE_SYNC) {
                        if (ln % 2) {
                              DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0);
                              if (debug_enabled(DBG_PIO))
                                    printk(" |00");
                        }
                        DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
                  }
                  /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */
                  if (debug_enabled(DBG_PIO))
                        printk("\n");
                  DC395x_write8(acb, TRM_S1040_SCSI_COMMAND,
                                SCMD_FIFO_OUT);
            }
      }
#endif                        /* DC395x_LASTPIO */
      else {            /* xfer pad */
            u8 data = 0, data2 = 0;
            if (srb->sg_count) {
                  srb->adapter_status = H_OVER_UNDER_RUN;
                  srb->status |= OVER_RUN;
            }
            /*
             * KG: despite the fact that we are using 16 bits I/O ops
             * the SCSI FIFO is only 8 bits according to the docs
             * (we can set bit 1 in 0x8f to serialize FIFO access ...)
             */
            if (dcb->sync_period & WIDE_SYNC) {
                  DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2);
                  DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2,
                              CFG2_WIDEFIFO);
                  if (io_dir & DMACMD_DIR) {
                        data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
                        data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
                  } else {
                        /* Danger, Robinson: If you find KGs
                         * scattered over the wide disk, the driver
                         * or chip is to blame :-( */
                        DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
                        DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G');
                  }
                  DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0);
            } else {
                  DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
                  /* Danger, Robinson: If you find a collection of Ks on your disk
                   * something broke :-( */
                  if (io_dir & DMACMD_DIR)
                        data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
                  else
                        DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K');
            }
            srb->state |= SRB_XFERPAD;
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
            /* SCSI command */
            bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT;
            DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval);
      }
}


static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
      srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
      srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);  /* get message */
      srb->state = SRB_COMPLETED;
      *pscsi_status = PH_BUS_FREE;  /*.. initial phase */
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun);
      srb->state = SRB_STATUS;
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP);
}


/* Check if the message is complete */
static inline u8 msgin_completed(u8 * msgbuf, u32 len)
{
      if (*msgbuf == EXTENDED_MESSAGE) {
            if (len < 2)
                  return 0;
            if (len < msgbuf[1] + 2)
                  return 0;
      } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f)  /* two byte messages */
            if (len < 2)
                  return 0;
      return 1;
}

/* reject_msg */
static inline void msgin_reject(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb)
{
      srb->msgout_buf[0] = MESSAGE_REJECT;
      srb->msg_count = 1;
      DC395x_ENABLE_MSGOUT;
      srb->state &= ~SRB_MSGIN;
      srb->state |= SRB_MSGOUT;
      dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n",
            srb->msgin_buf[0],
            srb->dcb->target_id, srb->dcb->target_lun);
}


static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb, u8 tag)
{
      struct ScsiReqBlk *srb = NULL;
      struct ScsiReqBlk *i;
      dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n",
               srb->cmd->pid, tag, srb);

      if (!(dcb->tag_mask & (1 << tag)))
            dprintkl(KERN_DEBUG,
                  "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n",
                  dcb->tag_mask, tag);

      if (list_empty(&dcb->srb_going_list))
            goto mingx0;
      list_for_each_entry(i, &dcb->srb_going_list, list) {
            if (i->tag_number == tag) {
                  srb = i;
                  break;
            }
      }
      if (!srb)
            goto mingx0;

      dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n",
            srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun);
      if (dcb->flag & ABORT_DEV_) {
            /*srb->state = SRB_ABORT_SENT; */
            enable_msgout_abort(acb, srb);
      }

      if (!(srb->state & SRB_DISCONNECT))
            goto mingx0;

      memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len);
      srb->state |= dcb->active_srb->state;
      srb->state |= SRB_DATA_XFER;
      dcb->active_srb = srb;
      /* How can we make the DORS happy? */
      return srb;

      mingx0:
      srb = acb->tmp_srb;
      srb->state = SRB_UNEXPECT_RESEL;
      dcb->active_srb = srb;
      srb->msgout_buf[0] = MSG_ABORT_TAG;
      srb->msg_count = 1;
      DC395x_ENABLE_MSGOUT;
      dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag);
      return srb;
}


static inline void reprogram_regs(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb)
{
      DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);
      DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);
      DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);
      set_xfer_rate(acb, dcb);
}


/* set async transfer mode */
static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n",
            dcb->target_id, dcb->target_lun);

      dcb->sync_mode &= ~(SYNC_NEGO_ENABLE);
      dcb->sync_mode |= SYNC_NEGO_DONE;
      /*dcb->sync_period &= 0; */
      dcb->sync_offset = 0;
      dcb->min_nego_period = 200 >> 2;    /* 200ns <=> 5 MHz */
      srb->state &= ~SRB_DO_SYNC_NEGO;
      reprogram_regs(acb, dcb);
      if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
          && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
            build_wdtr(acb, dcb, srb);
            DC395x_ENABLE_MSGOUT;
            dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n");
      }
}


/* set sync transfer mode */
static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      u8 bval;
      int fact;
      dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins "
            "(%02i.%01i MHz) Offset %i\n",
            dcb->target_id, srb->msgin_buf[3] << 2,
            (250 / srb->msgin_buf[3]),
            ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3],
            srb->msgin_buf[4]);

      if (srb->msgin_buf[4] > 15)
            srb->msgin_buf[4] = 15;
      if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO))
            dcb->sync_offset = 0;
      else if (dcb->sync_offset == 0)
            dcb->sync_offset = srb->msgin_buf[4];
      if (srb->msgin_buf[4] > dcb->sync_offset)
            srb->msgin_buf[4] = dcb->sync_offset;
      else
            dcb->sync_offset = srb->msgin_buf[4];
      bval = 0;
      while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval]
                      || dcb->min_nego_period >
                      clock_period[bval]))
            bval++;
      if (srb->msgin_buf[3] < clock_period[bval])
            dprintkl(KERN_INFO,
                  "msgin_set_sync: Increase sync nego period to %ins\n",
                  clock_period[bval] << 2);
      srb->msgin_buf[3] = clock_period[bval];
      dcb->sync_period &= 0xf0;
      dcb->sync_period |= ALT_SYNC | bval;
      dcb->min_nego_period = srb->msgin_buf[3];

      if (dcb->sync_period & WIDE_SYNC)
            fact = 500;
      else
            fact = 250;

      dprintkl(KERN_INFO,
            "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n",
            dcb->target_id, (fact == 500) ? "Wide16" : "",
            dcb->min_nego_period << 2, dcb->sync_offset,
            (fact / dcb->min_nego_period),
            ((fact % dcb->min_nego_period) * 10 +
            dcb->min_nego_period / 2) / dcb->min_nego_period);

      if (!(srb->state & SRB_DO_SYNC_NEGO)) {
            /* Reply with corrected SDTR Message */
            dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n",
                  srb->msgin_buf[3] << 2, srb->msgin_buf[4]);

            memcpy(srb->msgout_buf, srb->msgin_buf, 5);
            srb->msg_count = 5;
            DC395x_ENABLE_MSGOUT;
            dcb->sync_mode |= SYNC_NEGO_DONE;
      } else {
            if ((dcb->sync_mode & WIDE_NEGO_ENABLE)
                && !(dcb->sync_mode & WIDE_NEGO_DONE)) {
                  build_wdtr(acb, dcb, srb);
                  DC395x_ENABLE_MSGOUT;
                  dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n");
            }
      }
      srb->state &= ~SRB_DO_SYNC_NEGO;
      dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE;

      reprogram_regs(acb, dcb);
}


static inline void msgin_set_nowide(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id);

      dcb->sync_period &= ~WIDE_SYNC;
      dcb->sync_mode &= ~(WIDE_NEGO_ENABLE);
      dcb->sync_mode |= WIDE_NEGO_DONE;
      srb->state &= ~SRB_DO_WIDE_NEGO;
      reprogram_regs(acb, dcb);
      if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
          && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
            build_sdtr(acb, dcb, srb);
            DC395x_ENABLE_MSGOUT;
            dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n");
      }
}

static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      struct DeviceCtlBlk *dcb = srb->dcb;
      u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO
               && acb->config & HCC_WIDE_CARD) ? 1 : 0;
      dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id);

      if (srb->msgin_buf[3] > wide)
            srb->msgin_buf[3] = wide;
      /* Completed */
      if (!(srb->state & SRB_DO_WIDE_NEGO)) {
            dprintkl(KERN_DEBUG,
                  "msgin_set_wide: Wide nego initiated <%02i>\n",
                  dcb->target_id);
            memcpy(srb->msgout_buf, srb->msgin_buf, 4);
            srb->msg_count = 4;
            srb->state |= SRB_DO_WIDE_NEGO;
            DC395x_ENABLE_MSGOUT;
      }

      dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE);
      if (srb->msgin_buf[3] > 0)
            dcb->sync_period |= WIDE_SYNC;
      else
            dcb->sync_period &= ~WIDE_SYNC;
      srb->state &= ~SRB_DO_WIDE_NEGO;
      /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */
      dprintkdbg(DBG_1,
            "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n",
            (8 << srb->msgin_buf[3]), dcb->target_id);
      reprogram_regs(acb, dcb);
      if ((dcb->sync_mode & SYNC_NEGO_ENABLE)
          && !(dcb->sync_mode & SYNC_NEGO_DONE)) {
            build_sdtr(acb, dcb, srb);
            DC395x_ENABLE_MSGOUT;
            dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n");
      }
}


/*
 * extended message codes:
 *
 *    code  description
 *
 *    02h   Reserved
 *    00h   MODIFY DATA  POINTER
 *    01h   SYNCHRONOUS DATA TRANSFER REQUEST
 *    03h   WIDE DATA TRANSFER REQUEST
 *   04h - 7Fh    Reserved
 *   80h - FFh    Vendor specific
 */
static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      struct DeviceCtlBlk *dcb = acb->active_dcb;
      dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid);

      srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO);
      if (msgin_completed(srb->msgin_buf, acb->msg_len)) {
            /* Now eval the msg */
            switch (srb->msgin_buf[0]) {
            case DISCONNECT:
                  srb->state = SRB_DISCONNECT;
                  break;

            case SIMPLE_QUEUE_TAG:
            case HEAD_OF_QUEUE_TAG:
            case ORDERED_QUEUE_TAG:
                  srb =
                      msgin_qtag(acb, dcb,
                                    srb->msgin_buf[1]);
                  break;

            case MESSAGE_REJECT:
                  DC395x_write16(acb, TRM_S1040_SCSI_CONTROL,
                               DO_CLRATN | DO_DATALATCH);
                  /* A sync nego message was rejected ! */
                  if (srb->state & SRB_DO_SYNC_NEGO) {
                        msgin_set_async(acb, srb);
                        break;
                  }
                  /* A wide nego message was rejected ! */
                  if (srb->state & SRB_DO_WIDE_NEGO) {
                        msgin_set_nowide(acb, srb);
                        break;
                  }
                  enable_msgout_abort(acb, srb);
                  /*srb->state |= SRB_ABORT_SENT */
                  break;

            case EXTENDED_MESSAGE:
                  /* SDTR */
                  if (srb->msgin_buf[1] == 3
                      && srb->msgin_buf[2] == EXTENDED_SDTR) {
                        msgin_set_sync(acb, srb);
                        break;
                  }
                  /* WDTR */
                  if (srb->msgin_buf[1] == 2
                      && srb->msgin_buf[2] == EXTENDED_WDTR
                      && srb->msgin_buf[3] <= 2) { /* sanity check ... */
                        msgin_set_wide(acb, srb);
                        break;
                  }
                  msgin_reject(acb, srb);
                  break;

            case MSG_IGNOREWIDE:
                  /* Discard  wide residual */
                  dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n");
                  break;

            case COMMAND_COMPLETE:
                  /* nothing has to be done */
                  break;

            case SAVE_POINTERS:
                  /*
                   * SAVE POINTER may be ignored as we have the struct
                   * ScsiReqBlk* associated with the scsi command.
                   */
                  dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
                        "SAVE POINTER rem=%i Ignore\n",
                        srb->cmd->pid, srb->total_xfer_length);
                  break;

            case RESTORE_POINTERS:
                  dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n");
                  break;

            case ABORT:
                  dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) "
                        "<%02i-%i> ABORT msg\n",
                        srb->cmd->pid, dcb->target_id,
                        dcb->target_lun);
                  dcb->flag |= ABORT_DEV_;
                  enable_msgout_abort(acb, srb);
                  break;

            default:
                  /* reject unknown messages */
                  if (srb->msgin_buf[0] & IDENTIFY_BASE) {
                        dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n");
                        srb->msg_count = 1;
                        srb->msgout_buf[0] = dcb->identify_msg;
                        DC395x_ENABLE_MSGOUT;
                        srb->state |= SRB_MSGOUT;
                        /*break; */
                  }
                  msgin_reject(acb, srb);
            }

            /* Clear counter and MsgIn state */
            srb->state &= ~SRB_MSGIN;
            acb->msg_len = 0;
      }
      *pscsi_status = PH_BUS_FREE;
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important ... you know! */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
      dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid);
      clear_fifo(acb, "msgin_phase1");
      DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1);
      if (!(srb->state & SRB_MSGIN)) {
            srb->state &= ~SRB_DISCONNECT;
            srb->state |= SRB_MSGIN;
      }
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
      /* SCSI command */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN);
}


static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
}


static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb,
            u16 *pscsi_status)
{
}


static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb)
{
      struct DeviceCtlBlk *i;

      /* set all lun device's  period, offset */
      if (dcb->identify_msg & 0x07)
            return;

      if (acb->scan_devices) {
            current_sync_offset = dcb->sync_offset;
            return;
      }

      list_for_each_entry(i, &acb->dcb_list, list)
            if (i->target_id == dcb->target_id) {
                  i->sync_period = dcb->sync_period;
                  i->sync_offset = dcb->sync_offset;
                  i->sync_mode = dcb->sync_mode;
                  i->min_nego_period = dcb->min_nego_period;
            }
}


static void disconnect(struct AdapterCtlBlk *acb)
{
      struct DeviceCtlBlk *dcb = acb->active_dcb;
      struct ScsiReqBlk *srb;

      if (!dcb) {
            dprintkl(KERN_ERR, "disconnect: No such device\n");
            udelay(500);
            /* Suspend queue for a while */
            acb->scsi_host->last_reset =
                jiffies + HZ / 2 +
                HZ * acb->eeprom.delay_time;
            clear_fifo(acb, "disconnectEx");
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
            return;
      }
      srb = dcb->active_srb;
      acb->active_dcb = NULL;
      dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid);

      srb->scsi_phase = PH_BUS_FREE;      /* initial phase */
      clear_fifo(acb, "disconnect");
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT);
      if (srb->state & SRB_UNEXPECT_RESEL) {
            dprintkl(KERN_ERR,
                  "disconnect: Unexpected reselection <%02i-%i>\n",
                  dcb->target_id, dcb->target_lun);
            srb->state = 0;
            waiting_process_next(acb);
      } else if (srb->state & SRB_ABORT_SENT) {
            dcb->flag &= ~ABORT_DEV_;
            acb->scsi_host->last_reset = jiffies + HZ / 2 + 1;
            dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n");
            doing_srb_done(acb, DID_ABORT, srb->cmd, 1);
            waiting_process_next(acb);
      } else {
            if ((srb->state & (SRB_START_ + SRB_MSGOUT))
                || !(srb->
                   state & (SRB_DISCONNECT + SRB_COMPLETED))) {
                  /*
                   * Selection time out 
                   * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED)
                   */
                  /* Unexp. Disc / Sel Timeout */
                  if (srb->state != SRB_START_
                      && srb->state != SRB_MSGOUT) {
                        srb->state = SRB_READY;
                        dprintkl(KERN_DEBUG,
                              "disconnect: (pid#%li) Unexpected\n",
                              srb->cmd->pid);
                        srb->target_status = SCSI_STAT_SEL_TIMEOUT;
                        goto disc1;
                  } else {
                        /* Normal selection timeout */
                        dprintkdbg(DBG_KG, "disconnect: (pid#%li) "
                              "<%02i-%i> SelTO\n", srb->cmd->pid,
                              dcb->target_id, dcb->target_lun);
                        if (srb->retry_count++ > DC395x_MAX_RETRIES
                            || acb->scan_devices) {
                              srb->target_status =
                                  SCSI_STAT_SEL_TIMEOUT;
                              goto disc1;
                        }
                        free_tag(dcb, srb);
                        srb_going_to_waiting_move(dcb, srb);
                        dprintkdbg(DBG_KG,
                              "disconnect: (pid#%li) Retry\n",
                              srb->cmd->pid);
                        waiting_set_timer(acb, HZ / 20);
                  }
            } else if (srb->state & SRB_DISCONNECT) {
                  u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL);
                  /*
                   * SRB_DISCONNECT (This is what we expect!)
                   */
                  if (bval & 0x40) {
                        dprintkdbg(DBG_0, "disconnect: SCSI bus stat "
                              " 0x%02x: ACK set! Other controllers?\n",
                              bval);
                        /* It could come from another initiator, therefore don't do much ! */
                  } else
                        waiting_process_next(acb);
            } else if (srb->state & SRB_COMPLETED) {
                  disc1:
                  /*
                   ** SRB_COMPLETED
                   */
                  free_tag(dcb, srb);
                  dcb->active_srb = NULL;
                  srb->state = SRB_FREE;
                  srb_done(acb, dcb, srb);
            }
      }
}


static void reselect(struct AdapterCtlBlk *acb)
{
      struct DeviceCtlBlk *dcb = acb->active_dcb;
      struct ScsiReqBlk *srb = NULL;
      u16 rsel_tar_lun_id;
      u8 id, lun;
      u8 arblostflag = 0;
      dprintkdbg(DBG_0, "reselect: acb=%p\n", acb);

      clear_fifo(acb, "reselect");
      /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */
      /* Read Reselected Target ID and LUN */
      rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID);
      if (dcb) {        /* Arbitration lost but Reselection win */
            srb = dcb->active_srb;
            if (!srb) {
                  dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, "
                        "but active_srb == NULL\n");
                  DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
                  return;
            }
            /* Why the if ? */
            if (!acb->scan_devices) {
                  dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> "
                        "Arb lost but Resel win rsel=%i stat=0x%04x\n",
                        srb->cmd->pid, dcb->target_id,
                        dcb->target_lun, rsel_tar_lun_id,
                        DC395x_read16(acb, TRM_S1040_SCSI_STATUS));
                  arblostflag = 1;
                  /*srb->state |= SRB_DISCONNECT; */

                  srb->state = SRB_READY;
                  free_tag(dcb, srb);
                  srb_going_to_waiting_move(dcb, srb);
                  waiting_set_timer(acb, HZ / 20);

                  /* return; */
            }
      }
      /* Read Reselected Target Id and LUN */
      if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8)))
            dprintkl(KERN_DEBUG, "reselect: Expects identify msg. "
                  "Got %i!\n", rsel_tar_lun_id);
      id = rsel_tar_lun_id & 0xff;
      lun = (rsel_tar_lun_id >> 8) & 7;
      dcb = find_dcb(acb, id, lun);
      if (!dcb) {
            dprintkl(KERN_ERR, "reselect: From non existent device "
                  "<%02i-%i>\n", id, lun);
            DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);  /* it's important for atn stop */
            return;
      }
      acb->active_dcb = dcb;

      if (!(dcb->dev_mode & NTC_DO_DISCONNECT))
            dprintkl(KERN_DEBUG, "reselect: in spite of forbidden "
                  "disconnection? <%02i-%i>\n",
                  dcb->target_id, dcb->target_lun);

      if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) {
            srb = acb->tmp_srb;
            dcb->active_srb = srb;
      } else {
            /* There can be only one! */
            srb = dcb->active_srb;
            if (!srb || !(srb->state & SRB_DISCONNECT)) {
                  /*
                   * abort command
                   */
                  dprintkl(KERN_DEBUG,
                        "reselect: w/o disconnected cmds <%02i-%i>\n",
                        dcb->target_id, dcb->target_lun);
                  srb = acb->tmp_srb;
                  srb->state = SRB_UNEXPECT_RESEL;
                  dcb->active_srb = srb;
                  enable_msgout_abort(acb, srb);
            } else {
                  if (dcb->flag & ABORT_DEV_) {
                        /*srb->state = SRB_ABORT_SENT; */
                        enable_msgout_abort(acb, srb);
                  } else
                        srb->state = SRB_DATA_XFER;

            }
      }
      srb->scsi_phase = PH_BUS_FREE;      /* initial phase */

      /* Program HA ID, target ID, period and offset */
      dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id);
      DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);     /* host   ID */
      DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id);            /* target ID */
      DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset);            /* offset    */
      DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period);        /* sync period, wide */
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH);        /* it's important for atn stop */
      /* SCSI command */
      DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT);
}


static inline u8 tagq_blacklist(char *name)
{
#ifndef DC395x_NO_TAGQ
#if 0
      u8 i;
      for (i = 0; i < BADDEVCNT; i++)
            if (memcmp(name, DC395x_baddevname1[i], 28) == 0)
                  return 1;
#endif
      return 0;
#else
      return 1;
#endif
}


static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr)
{
      /* Check for SCSI format (ANSI and Response data format) */
      if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) {
            if ((ptr->Flags & SCSI_INQ_CMDQUEUE)
                && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) &&
                /*(dcb->dev_mode & NTC_DO_DISCONNECT) */
                /* ((dcb->dev_type == TYPE_DISK) 
                   || (dcb->dev_type == TYPE_MOD)) && */
                !tagq_blacklist(((char *)ptr) + 8)) {
                  if (dcb->max_command == 1)
                        dcb->max_command =
                            dcb->acb->tag_max_num;
                  dcb->sync_mode |= EN_TAG_QUEUEING;
                  /*dcb->tag_mask = 0; */
            } else
                  dcb->max_command = 1;
      }
}


static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiInqData *ptr)
{
      u8 bval1 = ptr->DevType & SCSI_DEVTYPE;
      dcb->dev_type = bval1;
      /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */
      disc_tagq_set(dcb, ptr);
}


/* unmap mapped pci regions from SRB */
static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb)
{
      struct scsi_cmnd *cmd = srb->cmd;
      enum dma_data_direction dir = cmd->sc_data_direction;
      if (cmd->use_sg && dir != PCI_DMA_NONE) {
            /* unmap DC395x SG list */
            dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n",
                  srb->sg_bus_addr, SEGMENTX_LEN);
            pci_unmap_single(acb->dev, srb->sg_bus_addr,
                         SEGMENTX_LEN,
                         PCI_DMA_TODEVICE);
            dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n",
                  cmd->use_sg, cmd->request_buffer);
            /* unmap the sg segments */
            pci_unmap_sg(acb->dev,
                       (struct scatterlist *)cmd->request_buffer,
                       cmd->use_sg, dir);
      } else if (cmd->request_buffer && dir != PCI_DMA_NONE) {
            dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n",
                  srb->segment_x[0].address, cmd->request_bufflen);
            pci_unmap_single(acb->dev, srb->segment_x[0].address,
                         cmd->request_bufflen, dir);
      }
}


/* unmap mapped pci sense buffer from SRB */
static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb,
            struct ScsiReqBlk *srb)
{
      if (!(srb->flag & AUTO_REQSENSE))
            return;
      /* Unmap sense buffer */
      dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n",
             srb->segment_x[0].address);
      pci_unmap_single(acb->dev, srb->segment_x[0].address,
                   srb->segment_x[0].length, PCI_DMA_FROMDEVICE);
      /* Restore SG stuff */
      srb->total_xfer_length = srb->xferred;
      srb->segment_x[0].address =
          srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address;
      srb->segment_x[0].length =
          srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length;
}


/*
 * Complete execution of a SCSI command
 * Signal completion to the generic SCSI driver  
 */
static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      u8 tempcnt, status;
      struct scsi_cmnd *cmd = srb->cmd;
      enum dma_data_direction dir = cmd->sc_data_direction;
      int ckc_only = 1;

      dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid,
            srb->cmd->device->id, srb->cmd->device->lun);
      dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p\n",
            srb, cmd->use_sg, srb->sg_index, srb->sg_count,
            cmd->request_buffer);
      status = srb->target_status;
      if (srb->flag & AUTO_REQSENSE) {
            dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n");
            pci_unmap_srb_sense(acb, srb);
            /*
             ** target status..........................
             */
            srb->flag &= ~AUTO_REQSENSE;
            srb->adapter_status = 0;
            srb->target_status = CHECK_CONDITION << 1;
            if (debug_enabled(DBG_1)) {
                  switch (cmd->sense_buffer[2] & 0x0f) {
                  case NOT_READY:
                        dprintkl(KERN_DEBUG,
                             "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
                             cmd->cmnd[0], dcb->target_id,
                             dcb->target_lun, status, acb->scan_devices);
                        break;
                  case UNIT_ATTENTION:
                        dprintkl(KERN_DEBUG,
                             "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
                             cmd->cmnd[0], dcb->target_id,
                             dcb->target_lun, status, acb->scan_devices);
                        break;
                  case ILLEGAL_REQUEST:
                        dprintkl(KERN_DEBUG,
                             "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
                             cmd->cmnd[0], dcb->target_id,
                             dcb->target_lun, status, acb->scan_devices);
                        break;
                  case MEDIUM_ERROR:
                        dprintkl(KERN_DEBUG,
                             "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
                             cmd->cmnd[0], dcb->target_id,
                             dcb->target_lun, status, acb->scan_devices);
                        break;
                  case HARDWARE_ERROR:
                        dprintkl(KERN_DEBUG,
                             "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ",
                             cmd->cmnd[0], dcb->target_id,
                             dcb->target_lun, status, acb->scan_devices);
                        break;
                  }
                  if (cmd->sense_buffer[7] >= 6)
                        printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x "
                              "(0x%08x 0x%08x)\n",
                              cmd->sense_buffer[2], cmd->sense_buffer[12],
                              cmd->sense_buffer[13],
                              *((unsigned int *)(cmd->sense_buffer + 3)),
                              *((unsigned int *)(cmd->sense_buffer + 8)));
                  else
                        printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n",
                              cmd->sense_buffer[2],
                              *((unsigned int *)(cmd->sense_buffer + 3)));
            }

            if (status == (CHECK_CONDITION << 1)) {
                  cmd->result = DID_BAD_TARGET << 16;
                  goto ckc_e;
            }
            dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n");

            if (srb->total_xfer_length
                && srb->total_xfer_length >= cmd->underflow)
                  cmd->result =
                      MK_RES_LNX(DRIVER_SENSE, DID_OK,
                               srb->end_message, CHECK_CONDITION);
            /*SET_RES_DID(cmd->result,DID_OK) */
            else
                  cmd->result =
                      MK_RES_LNX(DRIVER_SENSE, DID_OK,
                               srb->end_message, CHECK_CONDITION);

            goto ckc_e;
      }

/*************************************************************/
      if (status) {
            /*
             * target status..........................
             */
            if (status_byte(status) == CHECK_CONDITION) {
                  request_sense(acb, dcb, srb);
                  return;
            } else if (status_byte(status) == QUEUE_FULL) {
                  tempcnt = (u8)list_size(&dcb->srb_going_list);
                  dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n",
                       dcb->target_id, dcb->target_lun, tempcnt);
                  if (tempcnt > 1)
                        tempcnt--;
                  dcb->max_command = tempcnt;
                  free_tag(dcb, srb);
                  srb_going_to_waiting_move(dcb, srb);
                  waiting_set_timer(acb, HZ / 20);
                  srb->adapter_status = 0;
                  srb->target_status = 0;
                  return;
            } else if (status == SCSI_STAT_SEL_TIMEOUT) {
                  srb->adapter_status = H_SEL_TIMEOUT;
                  srb->target_status = 0;
                  cmd->result = DID_NO_CONNECT << 16;
            } else {
                  srb->adapter_status = 0;
                  SET_RES_DID(cmd->result, DID_ERROR);
                  SET_RES_MSG(cmd->result, srb->end_message);
                  SET_RES_TARGET(cmd->result, status);

            }
      } else {
            /*
             ** process initiator status..........................
             */
            status = srb->adapter_status;
            if (status & H_OVER_UNDER_RUN) {
                  srb->target_status = 0;
                  SET_RES_DID(cmd->result, DID_OK);
                  SET_RES_MSG(cmd->result, srb->end_message);
            } else if (srb->status & PARITY_ERROR) {
                  SET_RES_DID(cmd->result, DID_PARITY);
                  SET_RES_MSG(cmd->result, srb->end_message);
            } else {    /* No error */

                  srb->adapter_status = 0;
                  srb->target_status = 0;
                  SET_RES_DID(cmd->result, DID_OK);
            }
      }

      if (dir != PCI_DMA_NONE) {
            if (cmd->use_sg)
                  pci_dma_sync_sg_for_cpu(acb->dev,
                              (struct scatterlist *)cmd->
                              request_buffer, cmd->use_sg, dir);
            else if (cmd->request_buffer)
                  pci_dma_sync_single_for_cpu(acb->dev,
                                  srb->segment_x[0].address,
                                  cmd->request_bufflen, dir);
      }
      ckc_only = 0;
/* Check Error Conditions */
      ckc_e:

      if (cmd->cmnd[0] == INQUIRY) {
            unsigned char *base = NULL;
            struct ScsiInqData *ptr;
            unsigned long flags = 0;

            if (cmd->use_sg) {
                  struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer;
                  size_t offset = 0, len = sizeof(struct ScsiInqData);

                  local_irq_save(flags);
                  base = scsi_kmap_atomic_sg(sg, cmd->use_sg, &offset, &len);
                  ptr = (struct ScsiInqData *)(base + offset);
            } else
                  ptr = (struct ScsiInqData *)(cmd->request_buffer);

            if (!ckc_only && (cmd->result & RES_DID) == 0
                && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8
                && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2)
                  dcb->inquiry7 = ptr->Flags;

      /*if( srb->cmd->cmnd[0] == INQUIRY && */
      /*  (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
            if ((cmd->result == (DID_OK << 16)
                 || status_byte(cmd->result) &
                 CHECK_CONDITION)) {
                  if (!dcb->init_tcq_flag) {
                        add_dev(acb, dcb, ptr);
                        dcb->init_tcq_flag = 1;
                  }
            }

            if (cmd->use_sg) {
                  scsi_kunmap_atomic_sg(base);
                  local_irq_restore(flags);
            }
      }

      /* Here is the info for Doug Gilbert's sg3 ... */
      cmd->resid = srb->total_xfer_length;
      /* This may be interpreted by sb. or not ... */
      cmd->SCp.this_residual = srb->total_xfer_length;
      cmd->SCp.buffers_residual = 0;
      if (debug_enabled(DBG_KG)) {
            if (srb->total_xfer_length)
                  dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> "
                        "cmnd=0x%02x Missed %i bytes\n",
                        cmd->pid, cmd->device->id, cmd->device->lun,
                        cmd->cmnd[0], srb->total_xfer_length);
      }

      srb_going_remove(dcb, srb);
      /* Add to free list */
      if (srb == acb->tmp_srb)
            dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n");
      else {
            dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n",
                  cmd->pid, cmd->result);
            srb_free_insert(acb, srb);
      }
      pci_unmap_srb(acb, srb);

      cmd->scsi_done(cmd);
      waiting_process_next(acb);
}


/* abort all cmds in our queues */
static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag,
            struct scsi_cmnd *cmd, u8 force)
{
      struct DeviceCtlBlk *dcb;
      dprintkl(KERN_INFO, "doing_srb_done: pids ");

      list_for_each_entry(dcb, &acb->dcb_list, list) {
            struct ScsiReqBlk *srb;
            struct ScsiReqBlk *tmp;
            struct scsi_cmnd *p;

            list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) {
                  enum dma_data_direction dir;
                  int result;

                  p = srb->cmd;
                  dir = p->sc_data_direction;
                  result = MK_RES(0, did_flag, 0, 0);
                  printk("G:%li(%02i-%i) ", p->pid,
                         p->device->id, p->device->lun);
                  srb_going_remove(dcb, srb);
                  free_tag(dcb, srb);
                  srb_free_insert(acb, srb);
                  p->result = result;
                  pci_unmap_srb_sense(acb, srb);
                  pci_unmap_srb(acb, srb);
                  if (force) {
                        /* For new EH, we normally don't need to give commands back,
                         * as they all complete or all time out */
                        p->scsi_done(p);
                  }
            }
            if (!list_empty(&dcb->srb_going_list))
                  dprintkl(KERN_DEBUG, 
                         "How could the ML send cmnds to the Going queue? <%02i-%i>\n",
                         dcb->target_id, dcb->target_lun);
            if (dcb->tag_mask)
                  dprintkl(KERN_DEBUG,
                         "tag_mask for <%02i-%i> should be empty, is %08x!\n",
                         dcb->target_id, dcb->target_lun,
                         dcb->tag_mask);

            /* Waiting queue */
            list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) {
                  int result;
                  p = srb->cmd;

                  result = MK_RES(0, did_flag, 0, 0);
                  printk("W:%li<%02i-%i>", p->pid, p->device->id,
                         p->device->lun);
                  srb_waiting_remove(dcb, srb);
                  srb_free_insert(acb, srb);
                  p->result = result;
                  pci_unmap_srb_sense(acb, srb);
                  pci_unmap_srb(acb, srb);
                  if (force) {
                        /* For new EH, we normally don't need to give commands back,
                         * as they all complete or all time out */
                        cmd->scsi_done(cmd);
                  }
            }
            if (!list_empty(&dcb->srb_waiting_list))
                  dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n",
                       list_size(&dcb->srb_waiting_list), dcb->target_id,
                       dcb->target_lun);
            dcb->flag &= ~ABORT_DEV_;
      }
      printk("\n");
}


static void reset_scsi_bus(struct AdapterCtlBlk *acb)
{
      dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb);
      acb->acb_flag |= RESET_DEV;   /* RESET_DETECT, RESET_DONE, RESET_DEV */
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);

      while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET))
            /* nothing */;
}


static void set_basic_config(struct AdapterCtlBlk *acb)
{
      u8 bval;
      u16 wval;
      DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout);
      if (acb->config & HCC_PARITY)
            bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK;
      else
            bval = PHASELATCH | INITIATOR | BLOCKRST;

      DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval);

      /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */
      DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03);     /* was 0x13: default */
      /* program Host ID                  */
      DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id);
      /* set ansynchronous transfer       */
      DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00);
      /* Turn LED control off */
      wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F;
      DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval);
      /* DMA config          */
      wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL;
      wval |=
          DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ;
      DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval);
      /* Clear pending interrupt status */
      DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
      /* Enable SCSI interrupt    */
      DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F);
      DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR
                  /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */
                  );
}


static void scsi_reset_detect(struct AdapterCtlBlk *acb)
{
      dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb);
      /* delay half a second */
      if (timer_pending(&acb->waiting_timer))
            del_timer(&acb->waiting_timer);

      DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);
      DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
      /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */
      udelay(500);
      /* Maybe we locked up the bus? Then lets wait even longer ... */
      acb->scsi_host->last_reset =
          jiffies + 5 * HZ / 2 +
          HZ * acb->eeprom.delay_time;

      clear_fifo(acb, "scsi_reset_detect");
      set_basic_config(acb);
      /*1.25 */
      /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */

      if (acb->acb_flag & RESET_DEV) {    /* RESET_DETECT, RESET_DONE, RESET_DEV */
            acb->acb_flag |= RESET_DONE;
      } else {
            acb->acb_flag |= RESET_DETECT;
            reset_dev_param(acb);
            doing_srb_done(acb, DID_RESET, NULL, 1);
            /*DC395x_RecoverSRB( acb ); */
            acb->active_dcb = NULL;
            acb->acb_flag = 0;
            waiting_process_next(acb);
      }
}


static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
            struct ScsiReqBlk *srb)
{
      struct scsi_cmnd *cmd = srb->cmd;
      dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n",
            cmd->pid, cmd->device->id, cmd->device->lun);

      srb->flag |= AUTO_REQSENSE;
      srb->adapter_status = 0;
      srb->target_status = 0;

      /* KG: Can this prevent crap sense data ? */
      memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));

      /* Save some data */
      srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address =
          srb->segment_x[0].address;
      srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length =
          srb->segment_x[0].length;
      srb->xferred = srb->total_xfer_length;
      /* srb->segment_x : a one entry of S/G list table */
      srb->total_xfer_length = sizeof(cmd->sense_buffer);
      srb->segment_x[0].length = sizeof(cmd->sense_buffer);
      /* Map sense buffer */
      srb->segment_x[0].address =
          pci_map_single(acb->dev, cmd->sense_buffer,
                     sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE);
      dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n",
             cmd->sense_buffer, srb->segment_x[0].address,
             sizeof(cmd->sense_buffer));
      srb->sg_count = 1;
      srb->sg_index = 0;

      if (start_scsi(acb, dcb, srb)) {    /* Should only happen, if sb. else grabs the bus */
            dprintkl(KERN_DEBUG,
                  "request_sense: (pid#%li) failed <%02i-%i>\n",
                  srb->cmd->pid, dcb->target_id, dcb->target_lun);
            srb_going_to_waiting_move(dcb, srb);
            waiting_set_timer(acb, HZ / 100);
      }
}


/**
 * device_alloc - Allocate a new device instance. This create the
 * devices instance and sets up all the data items. The adapter
 * instance is required to obtain confiuration information for this
 * device. This does *not* add this device to the adapters device
 * list.
 *
 * @acb: The adapter to obtain configuration information from.
 * @target: The target for the new device.
 * @lun: The lun for the new device.
 *
 * Return the new device if successful or NULL on failure.
 **/
static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb,
            u8 target, u8 lun)
{
      struct NvRamType *eeprom = &acb->eeprom;
      u8 period_index = eeprom->target[target].period & 0x07;
      struct DeviceCtlBlk *dcb;

      dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC);
      dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun);
      if (!dcb)
            return NULL;
      dcb->acb = NULL;
      INIT_LIST_HEAD(&dcb->srb_going_list);
      INIT_LIST_HEAD(&dcb->srb_waiting_list);
      dcb->active_srb = NULL;
      dcb->tag_mask = 0;
      dcb->max_command = 1;
      dcb->target_id = target;
      dcb->target_lun = lun;
#ifndef DC395x_NO_DISCONNECT
      dcb->identify_msg =
          IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun);
#else
      dcb->identify_msg = IDENTIFY(0, lun);
#endif
      dcb->dev_mode = eeprom->target[target].cfg0;
      dcb->inquiry7 = 0;
      dcb->sync_mode = 0;
      dcb->min_nego_period = clock_period[period_index];
      dcb->sync_period = 0;
      dcb->sync_offset = 0;
      dcb->flag = 0;

#ifndef DC395x_NO_WIDE
      if ((dcb->dev_mode & NTC_DO_WIDE_NEGO)
          && (acb->config & HCC_WIDE_CARD))
            dcb->sync_mode |= WIDE_NEGO_ENABLE;
#endif
#ifndef DC395x_NO_SYNC
      if (dcb->dev_mode & NTC_DO_SYNC_NEGO)
            if (!(lun) || current_sync_offset)
                  dcb->sync_mode |= SYNC_NEGO_ENABLE;
#endif
      if (dcb->target_lun != 0) {
            /* Copy settings */
            struct DeviceCtlBlk *p;
            list_for_each_entry(p, &acb->dcb_list, list)
                  if (p->target_id == dcb->target_id)
                        break;
            dprintkdbg(DBG_1, 
                   "device_alloc: <%02i-%i> copy from <%02i-%i>\n",
                   dcb->target_id, dcb->target_lun,
                   p->target_id, p->target_lun);
            dcb->sync_mode = p->sync_mode;
            dcb->sync_period = p->sync_period;
            dcb->min_nego_period = p->min_nego_period;
            dcb->sync_offset = p->sync_offset;
            dcb->inquiry7 = p->inquiry7;
      }
      return dcb;
}


/**
 * adapter_add_device - Adds the device instance to the adaptor instance.
 *
 * @acb: The adapter device to be updated
 * @dcb: A newly created and intialised device instance to add.
 **/
static void adapter_add_device(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb)
{
      /* backpointer to adapter */
      dcb->acb = acb;
      
      /* set run_robin to this device if it is currently empty */
      if (list_empty(&acb->dcb_list))
            acb->dcb_run_robin = dcb;

      /* add device to list */
      list_add_tail(&dcb->list, &acb->dcb_list);

      /* update device maps */
      acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun);
      acb->children[dcb->target_id][dcb->target_lun] = dcb;
}


/**
 * adapter_remove_device - Removes the device instance from the adaptor
 * instance. The device instance is not check in any way or freed by this. 
 * The caller is expected to take care of that. This will simply remove the
 * device from the adapters data strcutures.
 *
 * @acb: The adapter device to be updated
 * @dcb: A device that has previously been added to the adapter.
 **/
static void adapter_remove_device(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb)
{
      struct DeviceCtlBlk *i;
      struct DeviceCtlBlk *tmp;
      dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n",
            dcb->target_id, dcb->target_lun);

      /* fix up any pointers to this device that we have in the adapter */
      if (acb->active_dcb == dcb)
            acb->active_dcb = NULL;
      if (acb->dcb_run_robin == dcb)
            acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb);

      /* unlink from list */
      list_for_each_entry_safe(i, tmp, &acb->dcb_list, list)
            if (dcb == i) {
                  list_del(&i->list);
                  break;
            }

      /* clear map and children */  
      acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun);
      acb->children[dcb->target_id][dcb->target_lun] = NULL;
      dcb->acb = NULL;
}


/**
 * adapter_remove_and_free_device - Removes a single device from the adapter
 * and then frees the device information.
 *
 * @acb: The adapter device to be updated
 * @dcb: A device that has previously been added to the adapter.
 */
static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb,
            struct DeviceCtlBlk *dcb)
{
      if (list_size(&dcb->srb_going_list) > 1) {
            dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> "
                       "Won't remove because of %i active requests.\n",
                     dcb->target_id, dcb->target_lun,
                     list_size(&dcb->srb_going_list));
            return;
      }
      adapter_remove_device(acb, dcb);
      kfree(dcb);
}


/**
 * adapter_remove_and_free_all_devices - Removes and frees all of the
 * devices associated with the specified adapter.
 *
 * @acb: The adapter from which all devices should be removed.
 **/
static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb)
{
      struct DeviceCtlBlk *dcb;
      struct DeviceCtlBlk *tmp;
      dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n",
               list_size(&acb->dcb_list));

      list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list)
            adapter_remove_and_free_device(acb, dcb);
}


/**
 * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new
 * scsi device that we need to deal with. We allocate a new device and then
 * insert that device into the adapters device list.
 *
 * @scsi_device: The new scsi device that we need to handle.
 **/
static int dc395x_slave_alloc(struct scsi_device *scsi_device)
{
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
      struct DeviceCtlBlk *dcb;

      dcb = device_alloc(acb, scsi_device->id, scsi_device->lun);
      if (!dcb)
            return -ENOMEM;
      adapter_add_device(acb, dcb);

      return 0;
}


/**
 * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a
 * device that is going away.
 *
 * @scsi_device: The new scsi device that we need to handle.
 **/
static void dc395x_slave_destroy(struct scsi_device *scsi_device)
{
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata;
      struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun);
      if (dcb)
            adapter_remove_and_free_device(acb, dcb);
}




/**
 * trms1040_wait_30us: wait for 30 us
 *
 * Waits for 30us (using the chip by the looks of it..)
 *
 * @io_port: base I/O address
 **/
static void __devinit trms1040_wait_30us(unsigned long io_port)
{
      /* ScsiPortStallExecution(30); wait 30 us */
      outb(5, io_port + TRM_S1040_GEN_TIMER);
      while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT))
            /* nothing */ ;
}


/**
 * trms1040_write_cmd - write the secified command and address to
 * chip
 *
 * @io_port:      base I/O address
 * @cmd:    SB + op code (command) to send
 * @addr:   address to send
 **/
static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr)
{
      int i;
      u8 send_data;

      /* program SB + OP code */
      for (i = 0; i < 3; i++, cmd <<= 1) {
            send_data = NVR_SELECT;
            if (cmd & 0x04)   /* Start from bit 2 */
                  send_data |= NVR_BITOUT;

            outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
            outb((send_data | NVR_CLOCK),
                 io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
      }

      /* send address */
      for (i = 0; i < 7; i++, addr <<= 1) {
            send_data = NVR_SELECT;
            if (addr & 0x40)  /* Start from bit 6 */
                  send_data |= NVR_BITOUT;

            outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
            outb((send_data | NVR_CLOCK),
                 io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
      }
      outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);
}


/**
 * trms1040_set_data - store a single byte in the eeprom
 *
 * Called from write all to write a single byte into the SSEEPROM
 * Which is done one bit at a time.
 *
 * @io_port:      base I/O address
 * @addr:   offset into EEPROM
 * @byte:   bytes to write
 **/
static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte)
{
      int i;
      u8 send_data;

      /* Send write command & address */
      trms1040_write_cmd(io_port, 0x05, addr);

      /* Write data */
      for (i = 0; i < 8; i++, byte <<= 1) {
            send_data = NVR_SELECT;
            if (byte & 0x80)  /* Start from bit 7 */
                  send_data |= NVR_BITOUT;

            outb(send_data, io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
            outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
      }
      outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);

      /* Disable chip select */
      outb(0, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);

      outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);

      /* Wait for write ready */
      while (1) {
            outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);

            outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);

            if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN)
                  break;
      }

      /*  Disable chip select */
      outb(0, io_port + TRM_S1040_GEN_NVRAM);
}


/**
 * trms1040_write_all - write 128 bytes to the eeprom
 *
 * Write the supplied 128 bytes to the chips SEEPROM
 *
 * @eeprom: the data to write
 * @io_port:      the base io port
 **/
static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port)
{
      u8 *b_eeprom = (u8 *)eeprom;
      u8 addr;

      /* Enable SEEPROM */
      outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
           io_port + TRM_S1040_GEN_CONTROL);

      /* write enable */
      trms1040_write_cmd(io_port, 0x04, 0xFF);
      outb(0, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);

      /* write */
      for (addr = 0; addr < 128; addr++, b_eeprom++)
            trms1040_set_data(io_port, addr, *b_eeprom);

      /* write disable */
      trms1040_write_cmd(io_port, 0x04, 0x00);
      outb(0, io_port + TRM_S1040_GEN_NVRAM);
      trms1040_wait_30us(io_port);

      /* Disable SEEPROM */
      outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
           io_port + TRM_S1040_GEN_CONTROL);
}


/**
 * trms1040_get_data - get a single byte from the eeprom
 *
 * Called from read all to read a single byte into the SSEEPROM
 * Which is done one bit at a time.
 *
 * @io_port:      base I/O address
 * @addr:   offset into SEEPROM
 *
 * Returns the the byte read.
 **/
static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr)
{
      int i;
      u8 read_byte;
      u8 result = 0;

      /* Send read command & address */
      trms1040_write_cmd(io_port, 0x06, addr);

      /* read data */
      for (i = 0; i < 8; i++) {
            outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM);
            trms1040_wait_30us(io_port);
            outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM);

            /* Get data bit while falling edge */
            read_byte = inb(io_port + TRM_S1040_GEN_NVRAM);
            result <<= 1;
            if (read_byte & NVR_BITIN)
                  result |= 1;

            trms1040_wait_30us(io_port);
      }

      /* Disable chip select */
      outb(0, io_port + TRM_S1040_GEN_NVRAM);
      return result;
}


/**
 * trms1040_read_all - read all bytes from the eeprom
 *
 * Read the 128 bytes from the SEEPROM.
 *
 * @eeprom: where to store the data
 * @io_port:      the base io port
 **/
static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port)
{
      u8 *b_eeprom = (u8 *)eeprom;
      u8 addr;

      /* Enable SEEPROM */
      outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM),
           io_port + TRM_S1040_GEN_CONTROL);

      /* read details */
      for (addr = 0; addr < 128; addr++, b_eeprom++)
            *b_eeprom = trms1040_get_data(io_port, addr);

      /* Disable SEEPROM */
      outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM),
           io_port + TRM_S1040_GEN_CONTROL);
}



/**
 * check_eeprom - get and check contents of the eeprom
 *
 * Read seeprom 128 bytes into the memory provider in eeprom.
 * Checks the checksum and if it's not correct it uses a set of default
 * values.
 *
 * @eeprom: caller allocated strcuture to read the eeprom data into
 * @io_port:      io port to read from
 **/
static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port)
{
      u16 *w_eeprom = (u16 *)eeprom;
      u16 w_addr;
      u16 cksum;
      u32 d_addr;
      u32 *d_eeprom;

      trms1040_read_all(eeprom, io_port); /* read eeprom */

      cksum = 0;
      for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64;
           w_addr++, w_eeprom++)
            cksum += *w_eeprom;
      if (cksum != 0x1234) {
            /*
             * Checksum is wrong.
             * Load a set of defaults into the eeprom buffer
             */
            dprintkl(KERN_WARNING,
                  "EEProm checksum error: using default values and options.\n");
            eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
            eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
            eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
            eeprom->sub_sys_id[1] =
                (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
            eeprom->sub_class = 0x00;
            eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM;
            eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8);
            eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040;
            eeprom->device_id[1] =
                (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8);
            eeprom->reserved = 0x00;

            for (d_addr = 0, d_eeprom = (u32 *)eeprom->target;
                 d_addr < 16; d_addr++, d_eeprom++)
                  *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */

            *d_eeprom++ = 0x04000F07;     /* max_tag,delay_time,channel_cfg,scsi_id */
            *d_eeprom++ = 0x00000015;     /* reserved1,boot_lun,boot_target,reserved0 */
            for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++)
                  *d_eeprom = 0x00;

            /* Now load defaults (maybe set by boot/module params) */
            set_safe_settings();
            fix_settings();
            eeprom_override(eeprom);

            eeprom->cksum = 0x00;
            for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom;
                 w_addr < 63; w_addr++, w_eeprom++)
                  cksum += *w_eeprom;

            *w_eeprom = 0x1234 - cksum;
            trms1040_write_all(eeprom, io_port);
            eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value;
      } else {
            set_safe_settings();
            eeprom_index_to_delay(eeprom);
            eeprom_override(eeprom);
      }
}


/**
 * print_eeprom_settings - output the eeprom settings
 * to the kernel log so people can see what they were.
 *
 * @eeprom: The eeprom data strucutre to show details for.
 **/
static void __devinit print_eeprom_settings(struct NvRamType *eeprom)
{
      dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n",
            eeprom->scsi_id,
            eeprom->target[0].period,
            clock_speed[eeprom->target[0].period] / 10,
            clock_speed[eeprom->target[0].period] % 10,
            eeprom->target[0].cfg0);
      dprintkl(KERN_INFO, "               AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n",
            eeprom->channel_cfg, eeprom->max_tag,
            1 << eeprom->max_tag, eeprom->delay_time);
}


/* Free SG tables */
static void adapter_sg_tables_free(struct AdapterCtlBlk *acb)
{
      int i;
      const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;

      for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page)
            kfree(acb->srb_array[i].segment_x);
}


/*
 * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*)
 * should never cross a page boundary */
static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb)
{
      const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1)
                                  *SEGMENTX_LEN;
      int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE;
      const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN;
      int srb_idx = 0;
      unsigned i = 0;
      struct SGentry *ptr;

      for (i = 0; i < DC395x_MAX_SRB_CNT; i++)
            acb->srb_array[i].segment_x = NULL;

      dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages);
      while (pages--) {
            ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL);
            if (!ptr) {
                  adapter_sg_tables_free(acb);
                  return 1;
            }
            dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n",
                  PAGE_SIZE, ptr, srb_idx);
            i = 0;
            while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT)
                  acb->srb_array[srb_idx++].segment_x =
                      ptr + (i++ * DC395x_MAX_SG_LISTENTRY);
      }
      if (i < srbs_per_page)
            acb->srb.segment_x =
                ptr + (i * DC395x_MAX_SG_LISTENTRY);
      else
            dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n");
      return 0;
}



/**
 * adapter_print_config - print adapter connection and termination
 * config
 *
 * The io port in the adapter needs to have been set before calling
 * this function.
 *
 * @acb: The adapter to print the information for.
 **/
static void __devinit adapter_print_config(struct AdapterCtlBlk *acb)
{
      u8 bval;

      bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS);
      dprintkl(KERN_INFO, "%sConnectors: ",
            ((bval & WIDESCSI) ? "(Wide) " : ""));
      if (!(bval & CON5068))
            printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50");
      if (!(bval & CON68))
            printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)");
      if (!(bval & CON50))
            printk("int50 ");
      if ((bval & (CON5068 | CON50 | CON68)) ==
          0 /*(CON5068 | CON50 | CON68) */ )
            printk(" Oops! (All 3?) ");
      bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL);
      printk(" Termination: ");
      if (bval & DIS_TERM)
            printk("Disabled\n");
      else {
            if (bval & AUTOTERM)
                  printk("Auto ");
            if (bval & LOW8TERM)
                  printk("Low ");
            if (bval & UP8TERM)
                  printk("High ");
            printk("\n");
      }
}


/**
 * adapter_init_params - Initialize the various parameters in the
 * adapter structure. Note that the pointer to the scsi_host is set
 * early (when this instance is created) and the io_port and irq
 * values are set later after they have been reserved. This just gets
 * everything set to a good starting position.
 *
 * The eeprom structure in the adapter needs to have been set before
 * calling this function.
 *
 * @acb: The adapter to initialize.
 **/
static void __devinit adapter_init_params(struct AdapterCtlBlk *acb)
{
      struct NvRamType *eeprom = &acb->eeprom;
      int i;

      /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */
      /* NOTE: acb->io_port_base is set at port registration time */
      /* NOTE: acb->io_port_len is set at port registration time */

      INIT_LIST_HEAD(&acb->dcb_list);
      acb->dcb_run_robin = NULL;
      acb->active_dcb = NULL;

      INIT_LIST_HEAD(&acb->srb_free_list);
      /*  temp SRB for Q tag used or abort command used  */
      acb->tmp_srb = &acb->srb;
      init_timer(&acb->waiting_timer);
      init_timer(&acb->selto_timer);

      acb->srb_count = DC395x_MAX_SRB_CNT;

      acb->sel_timeout = DC395x_SEL_TIMEOUT;    /* timeout=250ms */
      /* NOTE: acb->irq_level is set at IRQ registration time */

      acb->tag_max_num = 1 << eeprom->max_tag;
      if (acb->tag_max_num > 30)
            acb->tag_max_num = 30;

      acb->acb_flag = 0;      /* RESET_DETECT, RESET_DONE, RESET_DEV */
      acb->gmode2 = eeprom->channel_cfg;
      acb->config = 0;  /* NOTE: actually set in adapter_init_chip */

      if (eeprom->channel_cfg & NAC_SCANLUN)
            acb->lun_chk = 1;
      acb->scan_devices = 1;

      acb->scsi_host->this_id = eeprom->scsi_id;
      acb->hostid_bit = (1 << acb->scsi_host->this_id);

      for (i = 0; i < DC395x_MAX_SCSI_ID; i++)
            acb->dcb_map[i] = 0;

      acb->msg_len = 0;
      
      /* link static array of srbs into the srb free list */
      for (i = 0; i < acb->srb_count - 1; i++)
            srb_free_insert(acb, &acb->srb_array[i]);
}


/**
 * adapter_init_host - Initialize the scsi host instance based on
 * values that we have already stored in the adapter instance. There's
 * some mention that a lot of these are deprecated, so we won't use
 * them (we'll use the ones in the adapter instance) but we'll fill
 * them in in case something else needs them.
 *
 * The eeprom structure, irq and io ports in the adapter need to have
 * been set before calling this function.
 *
 * @host: The scsi host instance to fill in the values for.
 **/
static void __devinit adapter_init_scsi_host(struct Scsi_Host *host)
{
        struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
      struct NvRamType *eeprom = &acb->eeprom;
        
      host->max_cmd_len = 24;
      host->can_queue = DC395x_MAX_CMD_QUEUE;
      host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN;
      host->this_id = (int)eeprom->scsi_id;
      host->io_port = acb->io_port_base;
      host->n_io_port = acb->io_port_len;
      host->dma_channel = -1;
      host->unique_id = acb->io_port_base;
      host->irq = acb->irq_level;
      host->last_reset = jiffies;

      host->max_id = 16;
      if (host->max_id - 1 == eeprom->scsi_id)
            host->max_id--;

#ifdef CONFIG_SCSI_MULTI_LUN
      if (eeprom->channel_cfg & NAC_SCANLUN)
            host->max_lun = 8;
      else
            host->max_lun = 1;
#else
      host->max_lun = 1;
#endif

}


/**
 * adapter_init_chip - Get the chip into a know state and figure out
 * some of the settings that apply to this adapter.
 *
 * The io port in the adapter needs to have been set before calling
 * this function. The config will be configured correctly on return.
 *
 * @acb: The adapter which we are to init.
 **/
static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb)
{
        struct NvRamType *eeprom = &acb->eeprom;
        
        /* Mask all the interrupt */
      DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00);
      DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00);

      /* Reset SCSI module */
      DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE);

      /* Reset PCI/DMA module */
      DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE);
      udelay(20);

      /* program configuration 0 */
      acb->config = HCC_AUTOTERM | HCC_PARITY;
      if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI)
            acb->config |= HCC_WIDE_CARD;

      if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET)
            acb->config |= HCC_SCSI_RESET;

      if (acb->config & HCC_SCSI_RESET) {
            dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n");
            DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI);

            /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */
            /*spin_unlock_irq (&io_request_lock); */
            udelay(500);

            acb->scsi_host->last_reset =
                jiffies + HZ / 2 +
                HZ * acb->eeprom.delay_time;

            /*spin_lock_irq (&io_request_lock); */
      }
}


/**
 * init_adapter - Grab the resource for the card, setup the adapter
 * information, set the card into a known state, create the various
 * tables etc etc. This basically gets all adapter information all up
 * to date, intialised and gets the chip in sync with it.
 *
 * @host:   This hosts adapter structure
 * @io_port:      The base I/O port
 * @irq:    IRQ
 *
 * Returns 0 if the initialization succeeds, any other value on
 * failure.
 **/
static int __devinit adapter_init(struct AdapterCtlBlk *acb,
      unsigned long io_port, u32 io_port_len, unsigned int irq)
{
      if (!request_region(io_port, io_port_len, DC395X_NAME)) {
            dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port);
            goto failed;
      }
      /* store port base to indicate we have registered it */
      acb->io_port_base = io_port;
      acb->io_port_len = io_port_len;
      
      if (request_irq(irq, dc395x_interrupt, IRQF_SHARED, DC395X_NAME, acb)) {
            /* release the region we just claimed */
            dprintkl(KERN_INFO, "Failed to register IRQ\n");
            goto failed;
      }
      /* store irq to indicate we have registered it */
      acb->irq_level = irq;

      /* get eeprom configuration information and command line settings etc */
      check_eeprom(&acb->eeprom, io_port);
      print_eeprom_settings(&acb->eeprom);

      /* setup adapter control block */   
      adapter_init_params(acb);
      
      /* display card connectors/termination settings */
      adapter_print_config(acb);

      if (adapter_sg_tables_alloc(acb)) {
            dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n");
            goto failed;
      }
      adapter_init_scsi_host(acb->scsi_host);
      adapter_init_chip(acb);
      set_basic_config(acb);

      dprintkdbg(DBG_0,
            "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p "
            "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n",
            acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk),
            sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk));
      return 0;

failed:
      if (acb->irq_level)
            free_irq(acb->irq_level, acb);
      if (acb->io_port_base)
            release_region(acb->io_port_base, acb->io_port_len);
      adapter_sg_tables_free(acb);

      return 1;
}


/**
 * adapter_uninit_chip - cleanly shut down the scsi controller chip,
 * stopping all operations and disabling interrupt generation on the
 * card.
 *
 * @acb: The adapter which we are to shutdown.
 **/
static void adapter_uninit_chip(struct AdapterCtlBlk *acb)
{
      /* disable interrupts */
      DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0);
      DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0);

      /* reset the scsi bus */
      if (acb->config & HCC_SCSI_RESET)
            reset_scsi_bus(acb);

      /* clear any pending interupt state */
      DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS);
}



/**
 * adapter_uninit - Shut down the chip and release any resources that
 * we had allocated. Once this returns the adapter should not be used
 * anymore.
 *
 * @acb: The adapter which we are to un-initialize.
 **/
static void adapter_uninit(struct AdapterCtlBlk *acb)
{
      unsigned long flags;
      DC395x_LOCK_IO(acb->scsi_host, flags);

      /* remove timers */
      if (timer_pending(&acb->waiting_timer))
            del_timer(&acb->waiting_timer);
      if (timer_pending(&acb->selto_timer))
            del_timer(&acb->selto_timer);

      adapter_uninit_chip(acb);
      adapter_remove_and_free_all_devices(acb);
      DC395x_UNLOCK_IO(acb->scsi_host, flags);

      if (acb->irq_level)
            free_irq(acb->irq_level, acb);
      if (acb->io_port_base)
            release_region(acb->io_port_base, acb->io_port_len);

      adapter_sg_tables_free(acb);
}


#undef SPRINTF
#define SPRINTF(args...) pos += sprintf(pos, args)

#undef YESNO
#define YESNO(YN) \
 if (YN) SPRINTF(" Yes ");\
 else SPRINTF(" No  ")

static int dc395x_proc_info(struct Scsi_Host *host, char *buffer,
            char **start, off_t offset, int length, int inout)
{
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata;
      int spd, spd1;
      char *pos = buffer;
      struct DeviceCtlBlk *dcb;
      unsigned long flags;
      int dev;

      if (inout)        /* Has data been written to the file ? */
            return -EPERM;

      SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n");
      SPRINTF(" Driver Version " DC395X_VERSION "\n");

      DC395x_LOCK_IO(acb->scsi_host, flags);

      SPRINTF("SCSI Host Nr %i, ", host->host_no);
      SPRINTF("DC395U/UW/F DC315/U %s\n",
            (acb->config & HCC_WIDE_CARD) ? "Wide" : "");
      SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base);
      SPRINTF("irq_level 0x%04x, ", acb->irq_level);
      SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000);

      SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun);
      SPRINTF("AdapterID %i\n", host->this_id);

      SPRINTF("tag_max_num %i", acb->tag_max_num);
      /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */
      SPRINTF(", FilterCfg 0x%02x",
            DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1));
      SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time);
      /*SPRINTF("\n"); */

      SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list));
      SPRINTF
          ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n",
           acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2],
           acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5],
           acb->dcb_map[6], acb->dcb_map[7]);
      SPRINTF
          ("                      %02x %02x %02x %02x %02x %02x %02x %02x\n",
           acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10],
           acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13],
           acb->dcb_map[14], acb->dcb_map[15]);

      SPRINTF
          ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n");

      dev = 0;
      list_for_each_entry(dcb, &acb->dcb_list, list) {
            int nego_period;
            SPRINTF("%02i %02i  %02i ", dev, dcb->target_id,
                  dcb->target_lun);
            YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK);
            YESNO(dcb->sync_offset);
            YESNO(dcb->sync_period & WIDE_SYNC);
            YESNO(dcb->dev_mode & NTC_DO_DISCONNECT);
            YESNO(dcb->dev_mode & NTC_DO_SEND_START);
            YESNO(dcb->sync_mode & EN_TAG_QUEUEING);
            nego_period = clock_period[dcb->sync_period & 0x07] << 2;
            if (dcb->sync_offset)
                  SPRINTF("  %03i ns ", nego_period);
            else
                  SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2));

            if (dcb->sync_offset & 0x0f) {
                  spd = 1000 / (nego_period);
                  spd1 = 1000 % (nego_period);
                  spd1 = (spd1 * 10 + nego_period / 2) / (nego_period);
                  SPRINTF("   %2i.%1i M     %02i ", spd, spd1,
                        (dcb->sync_offset & 0x0f));
            } else
                  SPRINTF("                 ");

            /* Add more info ... */
            SPRINTF("     %02i\n", dcb->max_command);
            dev++;
      }

      if (timer_pending(&acb->waiting_timer))
            SPRINTF("Waiting queue timer running\n");
      else
            SPRINTF("\n");

      list_for_each_entry(dcb, &acb->dcb_list, list) {
            struct ScsiReqBlk *srb;
            if (!list_empty(&dcb->srb_waiting_list))
                  SPRINTF("DCB (%02i-%i): Waiting: %i:",
                        dcb->target_id, dcb->target_lun,
                        list_size(&dcb->srb_waiting_list));
                list_for_each_entry(srb, &dcb->srb_waiting_list, list)
                  SPRINTF(" %li", srb->cmd->pid);
            if (!list_empty(&dcb->srb_going_list))
                  SPRINTF("\nDCB (%02i-%i): Going  : %i:",
                        dcb->target_id, dcb->target_lun,
                        list_size(&dcb->srb_going_list));
            list_for_each_entry(srb, &dcb->srb_going_list, list)
                  SPRINTF(" %li", srb->cmd->pid);
            if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list))
                  SPRINTF("\n");
      }

      if (debug_enabled(DBG_1)) {
            SPRINTF("DCB list for ACB %p:\n", acb);
            list_for_each_entry(dcb, &acb->dcb_list, list) {
                  SPRINTF("%p -> ", dcb);
            }
            SPRINTF("END\n");
      }

      *start = buffer + offset;
      DC395x_UNLOCK_IO(acb->scsi_host, flags);

      if (pos - buffer < offset)
            return 0;
      else if (pos - buffer - offset < length)
            return pos - buffer - offset;
      else
            return length;
}


static struct scsi_host_template dc395x_driver_template = {
      .module                 = THIS_MODULE,
      .proc_name              = DC395X_NAME,
      .proc_info              = dc395x_proc_info,
      .name                   = DC395X_BANNER " " DC395X_VERSION,
      .queuecommand           = dc395x_queue_command,
      .bios_param             = dc395x_bios_param,
      .slave_alloc            = dc395x_slave_alloc,
      .slave_destroy          = dc395x_slave_destroy,
      .can_queue              = DC395x_MAX_CAN_QUEUE,
      .this_id                = 7,
      .sg_tablesize           = DC395x_MAX_SG_TABLESIZE,
      .cmd_per_lun            = DC395x_MAX_CMD_PER_LUN,
      .eh_abort_handler       = dc395x_eh_abort,
      .eh_bus_reset_handler   = dc395x_eh_bus_reset,
      .unchecked_isa_dma      = 0,
      .use_clustering         = DISABLE_CLUSTERING,
};


/**
 * banner_display - Display banner on first instance of driver
 * initialized.
 **/
static void banner_display(void)
{
      static int banner_done = 0;
      if (!banner_done)
      {
            dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION);
            banner_done = 1;
      }
}


/**
 * dc395x_init_one - Initialise a single instance of the adapter.
 *
 * The PCI layer will call this once for each instance of the adapter
 * that it finds in the system. The pci_dev strcuture indicates which
 * instance we are being called from.
 * 
 * @dev: The PCI device to intialize.
 * @id: Looks like a pointer to the entry in our pci device table
 * that was actually matched by the PCI subsystem.
 *
 * Returns 0 on success, or an error code (-ve) on failure.
 **/
static int __devinit dc395x_init_one(struct pci_dev *dev,
            const struct pci_device_id *id)
{
      struct Scsi_Host *scsi_host = NULL;
      struct AdapterCtlBlk *acb = NULL;
      unsigned long io_port_base;
      unsigned int io_port_len;
      unsigned int irq;
      
      dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev));
      banner_display();

      if (pci_enable_device(dev))
      {
            dprintkl(KERN_INFO, "PCI Enable device failed.\n");
            return -ENODEV;
      }
      io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK;
      io_port_len = pci_resource_len(dev, 0);
      irq = dev->irq;
      dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq);

      /* allocate scsi host information (includes out adapter) */
      scsi_host = scsi_host_alloc(&dc395x_driver_template,
                            sizeof(struct AdapterCtlBlk));
      if (!scsi_host) {
            dprintkl(KERN_INFO, "scsi_host_alloc failed\n");
            goto fail;
      }
      acb = (struct AdapterCtlBlk*)scsi_host->hostdata;
      acb->scsi_host = scsi_host;
      acb->dev = dev;

      /* initialise the adapter and everything we need */
      if (adapter_init(acb, io_port_base, io_port_len, irq)) {
            dprintkl(KERN_INFO, "adapter init failed\n");
            goto fail;
      }

      pci_set_master(dev);

      /* get the scsi mid level to scan for new devices on the bus */
      if (scsi_add_host(scsi_host, &dev->dev)) {
            dprintkl(KERN_ERR, "scsi_add_host failed\n");
            goto fail;
      }
      pci_set_drvdata(dev, scsi_host);
      scsi_scan_host(scsi_host);
            
      return 0;

fail:
      if (acb != NULL)
            adapter_uninit(acb);
      if (scsi_host != NULL)
            scsi_host_put(scsi_host);
      pci_disable_device(dev);
      return -ENODEV;
}


/**
 * dc395x_remove_one - Called to remove a single instance of the
 * adapter.
 *
 * @dev: The PCI device to intialize.
 **/
static void __devexit dc395x_remove_one(struct pci_dev *dev)
{
      struct Scsi_Host *scsi_host = pci_get_drvdata(dev);
      struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata);

      dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb);

      scsi_remove_host(scsi_host);
      adapter_uninit(acb);
      pci_disable_device(dev);
      scsi_host_put(scsi_host);
      pci_set_drvdata(dev, NULL);
}


static struct pci_device_id dc395x_pci_table[] = {
      {
            .vendor           = PCI_VENDOR_ID_TEKRAM,
            .device           = PCI_DEVICE_ID_TEKRAM_TRMS1040,
            .subvendor  = PCI_ANY_ID,
            .subdevice  = PCI_ANY_ID,
       },
      {}                /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, dc395x_pci_table);


static struct pci_driver dc395x_driver = {
      .name           = DC395X_NAME,
      .id_table       = dc395x_pci_table,
      .probe          = dc395x_init_one,
      .remove         = __devexit_p(dc395x_remove_one),
};


/**
 * dc395x_module_init - Module initialization function
 *
 * Used by both module and built-in driver to initialise this driver.
 **/
static int __init dc395x_module_init(void)
{
      return pci_module_init(&dc395x_driver);
}


/**
 * dc395x_module_exit - Module cleanup function.
 **/
static void __exit dc395x_module_exit(void)
{
      pci_unregister_driver(&dc395x_driver);
}


module_init(dc395x_module_init);
module_exit(dc395x_module_exit);

MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff");
MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series");
MODULE_LICENSE("GPL");

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