text: /*
   * NinjaSCSI-32Bi Cardbus, NinjaSCSI-32UDE PCI/CardBus SCSI driver
   * Copyright (C) 2001, 2002, 2003
   *      YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
   *      GOTO Masanori <gotom@debian.or.jp>, <gotom@debian.org>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2, or (at your option)
   * any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   *
   * Revision History:
   *   1.0: Initial Release.
   *   1.1: Add /proc SDTR status.
   *        Remove obsolete error handler nsp32_reset.
   *        Some clean up.
   *   1.2: PowerPC (big endian) support.
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/string.h>
  #include <linux/timer.h>
  #include <linux/ioport.h>
  #include <linux/major.h>
  #include <linux/blkdev.h>
  #include <linux/interrupt.h>
  #include <linux/pci.h>
  #include <linux/delay.h>
  #include <linux/ctype.h>
  #include <linux/dma-mapping.h>
  
  #include <asm/dma.h>
  #include <asm/system.h>
  #include <asm/io.h>
  
  #include <scsi/scsi.h>
  #include <scsi/scsi_cmnd.h>
  #include <scsi/scsi_device.h>
  #include <scsi/scsi_host.h>
  #include <scsi/scsi_ioctl.h>
  
  #include "nsp32.h"
  
  
  /***********************************************************************
   * Module parameters
   */
  static int       trans_mode = 0;	/* default: BIOS */
  module_param     (trans_mode, int, 0);
  MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
  #define ASYNC_MODE    1
  #define ULTRA20M_MODE 2
  
  static int       auto_param = 0;	/* default: ON */
  module_param     (auto_param, bool, 0);
  MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
  
  static int       disc_priv  = 1;	/* default: OFF */
  module_param     (disc_priv, bool, 0);
  MODULE_PARM_DESC(disc_priv,  "disconnection privilege mode (0: ON 1: OFF(default))");
  
  MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
  MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
  MODULE_LICENSE("GPL");
  
  static const char *nsp32_release_version = "1.2";
  
  
  /****************************************************************************
   * Supported hardware
   */
  static struct pci_device_id nsp32_pci_table[] __devinitdata = {
  	{
  		.vendor      = PCI_VENDOR_ID_IODATA,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_IODATA,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_KME,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_WORKBIT,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_WORKBIT_STANDARD,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_PCI_WORKBIT,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_LOGITEC,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_PCI_LOGITEC,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_PCI_MELCO,
  	},
  	{
  		.vendor      = PCI_VENDOR_ID_WORKBIT,
  		.device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
  		.subvendor   = PCI_ANY_ID,
  		.subdevice   = PCI_ANY_ID,
  		.driver_data = MODEL_PCI_MELCO,
  	},
  	{0,0,},
  };
  MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
  
  static nsp32_hw_data nsp32_data_base;  /* probe <-> detect glue */
  
  
  /*
   * Period/AckWidth speed conversion table
   *
   * Note: This period/ackwidth speed table must be in descending order.
   */
  static nsp32_sync_table nsp32_sync_table_40M[] = {
       /* {PNo, AW,   SP,   EP, SREQ smpl}  Speed(MB/s) Period AckWidth */
  	{0x1,  0, 0x0c, 0x0c, SMPL_40M},  /*  20.0 :  50ns,  25ns */
  	{0x2,  0, 0x0d, 0x18, SMPL_40M},  /*  13.3 :  75ns,  25ns */
  	{0x3,  1, 0x19, 0x19, SMPL_40M},  /*  10.0 : 100ns,  50ns */
  	{0x4,  1, 0x1a, 0x1f, SMPL_20M},  /*   8.0 : 125ns,  50ns */
  	{0x5,  2, 0x20, 0x25, SMPL_20M},  /*   6.7 : 150ns,  75ns */
  	{0x6,  2, 0x26, 0x31, SMPL_20M},  /*   5.7 : 175ns,  75ns */
  	{0x7,  3, 0x32, 0x32, SMPL_20M},  /*   5.0 : 200ns, 100ns */
  	{0x8,  3, 0x33, 0x38, SMPL_10M},  /*   4.4 : 225ns, 100ns */
  	{0x9,  3, 0x39, 0x3e, SMPL_10M},  /*   4.0 : 250ns, 100ns */
  };
  
  static nsp32_sync_table nsp32_sync_table_20M[] = {
  	{0x1,  0, 0x19, 0x19, SMPL_40M},  /* 10.0 : 100ns,  50ns */
  	{0x2,  0, 0x1a, 0x25, SMPL_20M},  /*  6.7 : 150ns,  50ns */
  	{0x3,  1, 0x26, 0x32, SMPL_20M},  /*  5.0 : 200ns, 100ns */
  	{0x4,  1, 0x33, 0x3e, SMPL_10M},  /*  4.0 : 250ns, 100ns */
  	{0x5,  2, 0x3f, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 150ns */
  	{0x6,  2, 0x4c, 0x57, SMPL_10M},  /*  2.8 : 350ns, 150ns */
  	{0x7,  3, 0x58, 0x64, SMPL_10M},  /*  2.5 : 400ns, 200ns */
  	{0x8,  3, 0x65, 0x70, SMPL_10M},  /*  2.2 : 450ns, 200ns */
  	{0x9,  3, 0x71, 0x7d, SMPL_10M},  /*  2.0 : 500ns, 200ns */
  };
  
  static nsp32_sync_table nsp32_sync_table_pci[] = {
  	{0x1,  0, 0x0c, 0x0f, SMPL_40M},  /* 16.6 :  60ns,  30ns */
  	{0x2,  0, 0x10, 0x16, SMPL_40M},  /* 11.1 :  90ns,  30ns */
  	{0x3,  1, 0x17, 0x1e, SMPL_20M},  /*  8.3 : 120ns,  60ns */
  	{0x4,  1, 0x1f, 0x25, SMPL_20M},  /*  6.7 : 150ns,  60ns */
  	{0x5,  2, 0x26, 0x2d, SMPL_20M},  /*  5.6 : 180ns,  90ns */
  	{0x6,  2, 0x2e, 0x34, SMPL_10M},  /*  4.8 : 210ns,  90ns */
  	{0x7,  3, 0x35, 0x3c, SMPL_10M},  /*  4.2 : 240ns, 120ns */
  	{0x8,  3, 0x3d, 0x43, SMPL_10M},  /*  3.7 : 270ns, 120ns */
  	{0x9,  3, 0x44, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 120ns */
  };
  
  /*
   * function declaration
   */
  /* module entry point */
  static int  __devinit nsp32_probe (struct pci_dev *, const struct pci_device_id *);
  static void __devexit nsp32_remove(struct pci_dev *);
  static int  __init    init_nsp32  (void);
  static void __exit    exit_nsp32  (void);
  
  /* struct struct scsi_host_template */
  static int         nsp32_proc_info   (struct Scsi_Host *, char *, char **, off_t, int, int);
  
  static int         nsp32_detect      (struct pci_dev *pdev);
  static int         nsp32_queuecommand(struct scsi_cmnd *,
  		void (*done)(struct scsi_cmnd *));
  static const char *nsp32_info        (struct Scsi_Host *);
  static int         nsp32_release     (struct Scsi_Host *);
  
  /* SCSI error handler */
  static int         nsp32_eh_abort     (struct scsi_cmnd *);
  static int         nsp32_eh_bus_reset (struct scsi_cmnd *);
  static int         nsp32_eh_host_reset(struct scsi_cmnd *);
  
  /* generate SCSI message */
  static void nsp32_build_identify(struct scsi_cmnd *);
  static void nsp32_build_nop     (struct scsi_cmnd *);
  static void nsp32_build_reject  (struct scsi_cmnd *);
  static void nsp32_build_sdtr    (struct scsi_cmnd *, unsigned char, unsigned char);
  
  /* SCSI message handler */
  static int  nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
  static void nsp32_msgout_occur (struct scsi_cmnd *);
  static void nsp32_msgin_occur  (struct scsi_cmnd *, unsigned long, unsigned short);
  
  static int  nsp32_setup_sg_table    (struct scsi_cmnd *);
  static int  nsp32_selection_autopara(struct scsi_cmnd *);
  static int  nsp32_selection_autoscsi(struct scsi_cmnd *);
  static void nsp32_scsi_done         (struct scsi_cmnd *);
  static int  nsp32_arbitration       (struct scsi_cmnd *, unsigned int);
  static int  nsp32_reselection       (struct scsi_cmnd *, unsigned char);
  static void nsp32_adjust_busfree    (struct scsi_cmnd *, unsigned int);
  static void nsp32_restart_autoscsi  (struct scsi_cmnd *, unsigned short);
  
  /* SCSI SDTR */
  static void nsp32_analyze_sdtr       (struct scsi_cmnd *);
  static int  nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
  static void nsp32_set_async          (nsp32_hw_data *, nsp32_target *);
  static void nsp32_set_max_sync       (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
  static void nsp32_set_sync_entry     (nsp32_hw_data *, nsp32_target *, int, unsigned char);
  
  /* SCSI bus status handler */
  static void nsp32_wait_req    (nsp32_hw_data *, int);
  static void nsp32_wait_sack   (nsp32_hw_data *, int);
  static void nsp32_sack_assert (nsp32_hw_data *);
  static void nsp32_sack_negate (nsp32_hw_data *);
  static void nsp32_do_bus_reset(nsp32_hw_data *);
  
  /* hardware interrupt handler */
  static irqreturn_t do_nsp32_isr(int, void *);
  
  /* initialize hardware */
  static int  nsp32hw_init(nsp32_hw_data *);
  
  /* EEPROM handler */
  static        int  nsp32_getprom_param (nsp32_hw_data *);
  static        int  nsp32_getprom_at24  (nsp32_hw_data *);
  static        int  nsp32_getprom_c16   (nsp32_hw_data *);
  static        void nsp32_prom_start    (nsp32_hw_data *);
  static        void nsp32_prom_stop     (nsp32_hw_data *);
  static        int  nsp32_prom_read     (nsp32_hw_data *, int);
  static        int  nsp32_prom_read_bit (nsp32_hw_data *);
  static        void nsp32_prom_write_bit(nsp32_hw_data *, int);
  static        void nsp32_prom_set      (nsp32_hw_data *, int, int);
  static        int  nsp32_prom_get      (nsp32_hw_data *, int);
  
  /* debug/warning/info message */
  static void nsp32_message (const char *, int, char *, char *, ...);
  #ifdef NSP32_DEBUG
  static void nsp32_dmessage(const char *, int, int,    char *, ...);
  #endif
  
  /*
   * max_sectors is currently limited up to 128.
   */
  static struct scsi_host_template nsp32_template = {
  	.proc_name			= "nsp32",
  	.name				= "Workbit NinjaSCSI-32Bi/UDE",
  	.proc_info			= nsp32_proc_info,
  	.info				= nsp32_info,
  	.queuecommand			= nsp32_queuecommand,
  	.can_queue			= 1,
  	.sg_tablesize			= NSP32_SG_SIZE,
  	.max_sectors			= 128,
  	.cmd_per_lun			= 1,
  	.this_id			= NSP32_HOST_SCSIID,
  	.use_clustering			= DISABLE_CLUSTERING,
  	.eh_abort_handler       	= nsp32_eh_abort,
  	.eh_bus_reset_handler		= nsp32_eh_bus_reset,
  	.eh_host_reset_handler		= nsp32_eh_host_reset,
  /*	.highmem_io			= 1, */
  };
  
  #include "nsp32_io.h"
  
  /***********************************************************************
   * debug, error print
   */
  #ifndef NSP32_DEBUG
  # define NSP32_DEBUG_MASK	      0x000000
  # define nsp32_msg(type, args...)     nsp32_message ("", 0, (type), args)
  # define nsp32_dbg(mask, args...)     /* */
  #else
  # define NSP32_DEBUG_MASK	      0xffffff
  # define nsp32_msg(type, args...) \
  	nsp32_message (__func__, __LINE__, (type), args)
  # define nsp32_dbg(mask, args...) \
  	nsp32_dmessage(__func__, __LINE__, (mask), args)
  #endif
  
  #define NSP32_DEBUG_QUEUECOMMAND	BIT(0)
  #define NSP32_DEBUG_REGISTER		BIT(1)
  #define NSP32_DEBUG_AUTOSCSI		BIT(2)
  #define NSP32_DEBUG_INTR		BIT(3)
  #define NSP32_DEBUG_SGLIST		BIT(4)
  #define NSP32_DEBUG_BUSFREE		BIT(5)
  #define NSP32_DEBUG_CDB_CONTENTS	BIT(6)
  #define NSP32_DEBUG_RESELECTION		BIT(7)
  #define NSP32_DEBUG_MSGINOCCUR		BIT(8)
  #define NSP32_DEBUG_EEPROM		BIT(9)
  #define NSP32_DEBUG_MSGOUTOCCUR		BIT(10)
  #define NSP32_DEBUG_BUSRESET		BIT(11)
  #define NSP32_DEBUG_RESTART		BIT(12)
  #define NSP32_DEBUG_SYNC		BIT(13)
  #define NSP32_DEBUG_WAIT		BIT(14)
  #define NSP32_DEBUG_TARGETFLAG		BIT(15)
  #define NSP32_DEBUG_PROC		BIT(16)
  #define NSP32_DEBUG_INIT		BIT(17)
  #define NSP32_SPECIAL_PRINT_REGISTER	BIT(20)
  
  #define NSP32_DEBUG_BUF_LEN		100
  
  static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
  {
  	va_list args;
  	char buf[NSP32_DEBUG_BUF_LEN];
  
  	va_start(args, fmt);
  	vsnprintf(buf, sizeof(buf), fmt, args);
  	va_end(args);
  
  #ifndef NSP32_DEBUG
  	printk("%snsp32: %s\n", type, buf);
  #else
  	printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
  #endif
  }
  
  #ifdef NSP32_DEBUG
  static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
  {
  	va_list args;
  	char buf[NSP32_DEBUG_BUF_LEN];
  
  	va_start(args, fmt);
  	vsnprintf(buf, sizeof(buf), fmt, args);
  	va_end(args);
  
  	if (mask & NSP32_DEBUG_MASK) {
  		printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
  	}
  }
  #endif
  
  #ifdef NSP32_DEBUG
  # include "nsp32_debug.c"
  #else
  # define show_command(arg)   /* */
  # define show_busphase(arg)  /* */
  # define show_autophase(arg) /* */
  #endif
  
  /*
   * IDENTIFY Message
   */
  static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	int pos             = data->msgout_len;
  	int mode            = FALSE;
  
  	/* XXX: Auto DiscPriv detection is progressing... */
  	if (disc_priv == 0) {
  		/* mode = TRUE; */
  	}
  
  	data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
  
  	data->msgout_len = pos;
  }
  
  /*
   * SDTR Message Routine
   */
  static void nsp32_build_sdtr(struct scsi_cmnd    *SCpnt,
  			     unsigned char period,
  			     unsigned char offset)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	int pos             = data->msgout_len;
  
  	data->msgoutbuf[pos] = EXTENDED_MESSAGE;  pos++;
  	data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
  	data->msgoutbuf[pos] = EXTENDED_SDTR;     pos++;
  	data->msgoutbuf[pos] = period;            pos++;
  	data->msgoutbuf[pos] = offset;            pos++;
  
  	data->msgout_len = pos;
  }
  
  /*
   * No Operation Message
   */
  static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	int            pos  = data->msgout_len;
  
  	if (pos != 0) {
  		nsp32_msg(KERN_WARNING,
  			  "Some messages are already contained!");
  		return;
  	}
  
  	data->msgoutbuf[pos] = NOP; pos++;
  	data->msgout_len = pos;
  }
  
  /*
   * Reject Message
   */
  static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	int            pos  = data->msgout_len;
  
  	data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
  	data->msgout_len = pos;
  }
  	
  /*
   * timer
   */
  #if 0
  static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
  {
  	unsigned int base = SCpnt->host->io_port;
  
  	nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
  
  	if (time & (~TIMER_CNT_MASK)) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
  	}
  
  	nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
  }
  #endif
  
  
  /*
   * set SCSI command and other parameter to asic, and start selection phase
   */
  static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int	base    = SCpnt->device->host->io_port;
  	unsigned int	host_id = SCpnt->device->host->this_id;
  	unsigned char	target  = scmd_id(SCpnt);
  	nsp32_autoparam *param  = data->autoparam;
  	unsigned char	phase;
  	int		i, ret;
  	unsigned int	msgout;
  	u16_le	        s;
  
  	nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
  
  	/*
  	 * check bus free
  	 */
  	phase = nsp32_read1(base, SCSI_BUS_MONITOR);
  	if (phase != BUSMON_BUS_FREE) {
  		nsp32_msg(KERN_WARNING, "bus busy");
  		show_busphase(phase & BUSMON_PHASE_MASK);
  		SCpnt->result = DID_BUS_BUSY << 16;
  		return FALSE;
  	}
  
  	/*
  	 * message out
  	 *
  	 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
  	 *       over 3 messages needs another routine.
  	 */
  	if (data->msgout_len == 0) {
  		nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
  		SCpnt->result = DID_ERROR << 16;
  		return FALSE;
  	} else if (data->msgout_len > 0 && data->msgout_len <= 3) {
  		msgout = 0;
  		for (i = 0; i < data->msgout_len; i++) {
  			/*
  			 * the sending order of the message is:
  			 *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
  			 *  MCNT 2:          MSG#1 -> MSG#2
  			 *  MCNT 1:                   MSG#2    
  			 */
  			msgout >>= 8;
  			msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
  		}
  		msgout |= MV_VALID;	/* MV valid */
  		msgout |= (unsigned int)data->msgout_len; /* len */
  	} else {
  		/* data->msgout_len > 3 */
  		msgout = 0;
  	}
  
  	// nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
  	// nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
  
  	/*
  	 * setup asic parameter
  	 */
  	memset(param, 0, sizeof(nsp32_autoparam));
  
  	/* cdb */
  	for (i = 0; i < SCpnt->cmd_len; i++) {
  		param->cdb[4 * i] = SCpnt->cmnd[i];
  	}
  
  	/* outgoing messages */
  	param->msgout = cpu_to_le32(msgout);
  
  	/* syncreg, ackwidth, target id, SREQ sampling rate */
  	param->syncreg    = data->cur_target->syncreg;
  	param->ackwidth   = data->cur_target->ackwidth;
  	param->target_id  = BIT(host_id) | BIT(target);
  	param->sample_reg = data->cur_target->sample_reg;
  
  	// nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
  
  	/* command control */
  	param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
  					     AUTOSCSI_START         |
  					     AUTO_MSGIN_00_OR_04    |
  					     AUTO_MSGIN_02          |
  					     AUTO_ATN               );
  
  
  	/* transfer control */
  	s = 0;
  	switch (data->trans_method) {
  	case NSP32_TRANSFER_BUSMASTER:
  		s |= BM_START;
  		break;
  	case NSP32_TRANSFER_MMIO:
  		s |= CB_MMIO_MODE;
  		break;
  	case NSP32_TRANSFER_PIO:
  		s |= CB_IO_MODE;
  		break;
  	default:
  		nsp32_msg(KERN_ERR, "unknown trans_method");
  		break;
  	}
  	/*
  	 * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
  	 * For bus master transfer, it's taken off.
  	 */
  	s |= (TRANSFER_GO | ALL_COUNTER_CLR);
  	param->transfer_control = cpu_to_le16(s);
  
  	/* sg table addr */
  	param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
  
  	/*
  	 * transfer parameter to ASIC
  	 */
  	nsp32_write4(base, SGT_ADR,         data->auto_paddr);
  	nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
  		                            AUTO_PARAMETER         );
  
  	/*
  	 * Check arbitration
  	 */
  	ret = nsp32_arbitration(SCpnt, base);
  
  	return ret;
  }
  
  
  /*
   * Selection with AUTO SCSI (without AUTO PARAMETER)
   */
  static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int	base    = SCpnt->device->host->io_port;
  	unsigned int	host_id = SCpnt->device->host->this_id;
  	unsigned char	target  = scmd_id(SCpnt);
  	unsigned char	phase;
  	int		status;
  	unsigned short	command	= 0;
  	unsigned int	msgout  = 0;
  	unsigned short	execph;
  	int		i;
  
  	nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
  
  	/*
  	 * IRQ disable
  	 */
  	nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
  
  	/*
  	 * check bus line
  	 */
  	phase = nsp32_read1(base, SCSI_BUS_MONITOR);
  	if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
  		nsp32_msg(KERN_WARNING, "bus busy");
  		SCpnt->result = DID_BUS_BUSY << 16;
  		status = 1;
  		goto out;
          }
  
  	/*
  	 * clear execph
  	 */
  	execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
  
  	/*
  	 * clear FIFO counter to set CDBs
  	 */
  	nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
  
  	/*
  	 * set CDB0 - CDB15
  	 */
  	for (i = 0; i < SCpnt->cmd_len; i++) {
  		nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
          }
  	nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
  
  	/*
  	 * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
  	 */
  	nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
  
  	/*
  	 * set SCSI MSGOUT REG
  	 *
  	 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
  	 *       over 3 messages needs another routine.
  	 */
  	if (data->msgout_len == 0) {
  		nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
  		SCpnt->result = DID_ERROR << 16;
  		status = 1;
  		goto out;
  	} else if (data->msgout_len > 0 && data->msgout_len <= 3) {
  		msgout = 0;
  		for (i = 0; i < data->msgout_len; i++) {
  			/*
  			 * the sending order of the message is:
  			 *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
  			 *  MCNT 2:          MSG#1 -> MSG#2
  			 *  MCNT 1:                   MSG#2    
  			 */
  			msgout >>= 8;
  			msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
  		}
  		msgout |= MV_VALID;	/* MV valid */
  		msgout |= (unsigned int)data->msgout_len; /* len */
  		nsp32_write4(base, SCSI_MSG_OUT, msgout);
  	} else {
  		/* data->msgout_len > 3 */
  		nsp32_write4(base, SCSI_MSG_OUT, 0);
  	}
  
  	/*
  	 * set selection timeout(= 250ms)
  	 */
  	nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
  
  	/*
  	 * set SREQ hazard killer sampling rate
  	 * 
  	 * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
  	 *      check other internal clock!
  	 */
  	nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
  
  	/*
  	 * clear Arbit
  	 */
  	nsp32_write1(base, SET_ARBIT,      ARBIT_CLEAR);
  
  	/*
  	 * set SYNCREG
  	 * Don't set BM_START_ADR before setting this register.
  	 */
  	nsp32_write1(base, SYNC_REG,  data->cur_target->syncreg);
  
  	/*
  	 * set ACKWIDTH
  	 */
  	nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
  
  	nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
  		  "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
  		  nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
  		  nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
  	nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
  		  data->msgout_len, msgout);
  
  	/*
  	 * set SGT ADDR (physical address)
  	 */
  	nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
  
  	/*
  	 * set TRANSFER CONTROL REG
  	 */
  	command = 0;
  	command |= (TRANSFER_GO | ALL_COUNTER_CLR);
  	if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
  		if (scsi_bufflen(SCpnt) > 0) {
  			command |= BM_START;
  		}
  	} else if (data->trans_method & NSP32_TRANSFER_MMIO) {
  		command |= CB_MMIO_MODE;
  	} else if (data->trans_method & NSP32_TRANSFER_PIO) {
  		command |= CB_IO_MODE;
  	}
  	nsp32_write2(base, TRANSFER_CONTROL, command);
  
  	/*
  	 * start AUTO SCSI, kick off arbitration
  	 */
  	command = (CLEAR_CDB_FIFO_POINTER |
  		   AUTOSCSI_START         |
  		   AUTO_MSGIN_00_OR_04    |
  		   AUTO_MSGIN_02          |
  		   AUTO_ATN                );
  	nsp32_write2(base, COMMAND_CONTROL, command);
  
  	/*
  	 * Check arbitration
  	 */
  	status = nsp32_arbitration(SCpnt, base);
  
   out:
  	/*
  	 * IRQ enable
  	 */
  	nsp32_write2(base, IRQ_CONTROL, 0);
  
  	return status;
  }
  
  
  /*
   * Arbitration Status Check
   *	
   * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
   *	 Using udelay(1) consumes CPU time and system time, but 
   *	 arbitration delay time is defined minimal 2.4us in SCSI
   *	 specification, thus udelay works as coarse grained wait timer.
   */
  static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
  {
  	unsigned char arbit;
  	int	      status = TRUE;
  	int	      time   = 0;
  
  	do {
  		arbit = nsp32_read1(base, ARBIT_STATUS);
  		time++;
  	} while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
  		 (time <= ARBIT_TIMEOUT_TIME));
  
  	nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
  		  "arbit: 0x%x, delay time: %d", arbit, time);
  
  	if (arbit & ARBIT_WIN) {
  		/* Arbitration succeeded */
  		SCpnt->result = DID_OK << 16;
  		nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
  	} else if (arbit & ARBIT_FAIL) {
  		/* Arbitration failed */
  		SCpnt->result = DID_BUS_BUSY << 16;
  		status = FALSE;
  	} else {
  		/*
  		 * unknown error or ARBIT_GO timeout,
  		 * something lock up! guess no connection.
  		 */
  		nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
  		SCpnt->result = DID_NO_CONNECT << 16;
  		status = FALSE;
          }
  
  	/*
  	 * clear Arbit
  	 */
  	nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
  
  	return status;
  }
  
  
  /*
   * reselection
   *
   * Note: This reselection routine is called from msgin_occur,
   *	 reselection target id&lun must be already set.
   *	 SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
   */
  static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   host_id = SCpnt->device->host->this_id;
  	unsigned int   base    = SCpnt->device->host->io_port;
  	unsigned char  tmpid, newid;
  
  	nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
  
  	/*
  	 * calculate reselected SCSI ID
  	 */
  	tmpid = nsp32_read1(base, RESELECT_ID);
  	tmpid &= (~BIT(host_id));
  	newid = 0;
  	while (tmpid) {
  		if (tmpid & 1) {
  			break;
  		}
  		tmpid >>= 1;
  		newid++;
  	}
  
  	/*
  	 * If reselected New ID:LUN is not existed
  	 * or current nexus is not existed, unexpected
  	 * reselection is occurred. Send reject message.
  	 */
  	if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
  		nsp32_msg(KERN_WARNING, "unknown id/lun");
  		return FALSE;
  	} else if(data->lunt[newid][newlun].SCpnt == NULL) {
  		nsp32_msg(KERN_WARNING, "no SCSI command is processing");
  		return FALSE;
  	}
  
  	data->cur_id    = newid;
  	data->cur_lun   = newlun;
  	data->cur_target = &(data->target[newid]);
  	data->cur_lunt   = &(data->lunt[newid][newlun]);
  
  	/* reset SACK/SavedACK counter (or ALL clear?) */
  	nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
  
  	return TRUE;
  }
  
  
  /*
   * nsp32_setup_sg_table - build scatter gather list for transfer data
   *			    with bus master.
   *
   * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
   */
  static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	struct scatterlist *sg;
  	nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
  	int num, i;
  	u32_le l;
  
  	if (sgt == NULL) {
  		nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
  		return FALSE;
  	}
  
  	num = scsi_dma_map(SCpnt);
  	if (!num)
  		return TRUE;
  	else if (num < 0)
  		return FALSE;
  	else {
  		scsi_for_each_sg(SCpnt, sg, num, i) {
  			/*
  			 * Build nsp32_sglist, substitute sg dma addresses.
  			 */
  			sgt[i].addr = cpu_to_le32(sg_dma_address(sg));
  			sgt[i].len  = cpu_to_le32(sg_dma_len(sg));
  
  			if (le32_to_cpu(sgt[i].len) > 0x10000) {
  				nsp32_msg(KERN_ERR,
  					"can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
  				return FALSE;
  			}
  			nsp32_dbg(NSP32_DEBUG_SGLIST,
  				  "num 0x%x : addr 0x%lx len 0x%lx",
  				  i,
  				  le32_to_cpu(sgt[i].addr),
  				  le32_to_cpu(sgt[i].len ));
  		}
  
  		/* set end mark */
  		l = le32_to_cpu(sgt[num-1].len);
  		sgt[num-1].len = cpu_to_le32(l | SGTEND);
  	}
  
  	return TRUE;
  }
  
  static int nsp32_queuecommand(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	nsp32_target *target;
  	nsp32_lunt   *cur_lunt;
  	int ret;
  
  	nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
  		  "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
  		  "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
  		  SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
  		  scsi_sg_count(SCpnt), scsi_sglist(SCpnt), scsi_bufflen(SCpnt));
  
  	if (data->CurrentSC != NULL) {
  		nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
  		data->CurrentSC = NULL;
  		SCpnt->result   = DID_NO_CONNECT << 16;
  		done(SCpnt);
  		return 0;
  	}
  
  	/* check target ID is not same as this initiator ID */
  	if (scmd_id(SCpnt) == SCpnt->device->host->this_id) {
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
  		SCpnt->result = DID_BAD_TARGET << 16;
  		done(SCpnt);
  		return 0;
  	}
  
  	/* check target LUN is allowable value */
  	if (SCpnt->device->lun >= MAX_LUN) {
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
  		SCpnt->result = DID_BAD_TARGET << 16;
  		done(SCpnt);
  		return 0;
  	}
  
  	show_command(SCpnt);
  
  	SCpnt->scsi_done     = done;
  	data->CurrentSC      = SCpnt;
  	SCpnt->SCp.Status    = CHECK_CONDITION;
  	SCpnt->SCp.Message   = 0;
  	scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
  
  	SCpnt->SCp.ptr		    = (char *)scsi_sglist(SCpnt);
  	SCpnt->SCp.this_residual    = scsi_bufflen(SCpnt);
  	SCpnt->SCp.buffer	    = NULL;
  	SCpnt->SCp.buffers_residual = 0;
  
  	/* initialize data */
  	data->msgout_len	= 0;
  	data->msgin_len		= 0;
  	cur_lunt		= &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
  	cur_lunt->SCpnt		= SCpnt;
  	cur_lunt->save_datp	= 0;
  	cur_lunt->msgin03	= FALSE;
  	data->cur_lunt		= cur_lunt;
  	data->cur_id		= SCpnt->device->id;
  	data->cur_lun		= SCpnt->device->lun;
  
  	ret = nsp32_setup_sg_table(SCpnt);
  	if (ret == FALSE) {
  		nsp32_msg(KERN_ERR, "SGT fail");
  		SCpnt->result = DID_ERROR << 16;
  		nsp32_scsi_done(SCpnt);
  		return 0;
  	}
  
  	/* Build IDENTIFY */
  	nsp32_build_identify(SCpnt);
  
  	/* 
  	 * If target is the first time to transfer after the reset
  	 * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
  	 * message SDTR is needed to do synchronous transfer.
  	 */
  	target = &data->target[scmd_id(SCpnt)];
  	data->cur_target = target;
  
  	if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
  		unsigned char period, offset;
  
  		if (trans_mode != ASYNC_MODE) {
  			nsp32_set_max_sync(data, target, &period, &offset);
  			nsp32_build_sdtr(SCpnt, period, offset);
  			target->sync_flag |= SDTR_INITIATOR;
  		} else {
  			nsp32_set_async(data, target);
  			target->sync_flag |= SDTR_DONE;
  		}
  
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
  			  "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
  			  target->limit_entry, period, offset);
  	} else if (target->sync_flag & SDTR_INITIATOR) {
  		/*
  		 * It was negotiating SDTR with target, sending from the
  		 * initiator, but there are no chance to remove this flag.
  		 * Set async because we don't get proper negotiation.
  		 */
  		nsp32_set_async(data, target);
  		target->sync_flag &= ~SDTR_INITIATOR;
  		target->sync_flag |= SDTR_DONE;
  
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
  			  "SDTR_INITIATOR: fall back to async");
  	} else if (target->sync_flag & SDTR_TARGET) {
  		/*
  		 * It was negotiating SDTR with target, sending from target,
  		 * but there are no chance to remove this flag.  Set async
  		 * because we don't get proper negotiation.
  		 */
  		nsp32_set_async(data, target);
  		target->sync_flag &= ~SDTR_TARGET;
  		target->sync_flag |= SDTR_DONE;
  
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
  			  "Unknown SDTR from target is reached, fall back to async.");
  	}
  
  	nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
  		  "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
  		  SCpnt->device->id, target->sync_flag, target->syncreg,
  		  target->ackwidth);
  
  	/* Selection */
  	if (auto_param == 0) {
  		ret = nsp32_selection_autopara(SCpnt);
  	} else {
  		ret = nsp32_selection_autoscsi(SCpnt);
  	}
  
  	if (ret != TRUE) {
  		nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
  		nsp32_scsi_done(SCpnt);
  	}
  
  	return 0;
  }
  
  /* initialize asic */
  static int nsp32hw_init(nsp32_hw_data *data)
  {
  	unsigned int   base = data->BaseAddress;
  	unsigned short irq_stat;
  	unsigned long  lc_reg;
  	unsigned char  power;
  
  	lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
  	if ((lc_reg & 0xff00) == 0) {
  		lc_reg |= (0x20 << 8);
  		nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
  	}
  
  	nsp32_write2(base, IRQ_CONTROL,        IRQ_CONTROL_ALL_IRQ_MASK);
  	nsp32_write2(base, TRANSFER_CONTROL,   0);
  	nsp32_write4(base, BM_CNT,             0);
  	nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
  
  	do {
  		irq_stat = nsp32_read2(base, IRQ_STATUS);
  		nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
  	} while (irq_stat & IRQSTATUS_ANY_IRQ);
  
  	/*
  	 * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
  	 *  designated by specification.
  	 */
  	if ((data->trans_method & NSP32_TRANSFER_PIO) ||
  	    (data->trans_method & NSP32_TRANSFER_MMIO)) {
  		nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x40);
  		nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
  	} else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
  		nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x10);
  		nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
  	} else {
  		nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
  	}
  
  	nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
  		  nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
  		  nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
  
  	nsp32_index_write1(base, CLOCK_DIV, data->clock);
  	nsp32_index_write1(base, BM_CYCLE,  MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
  	nsp32_write1(base, PARITY_CONTROL, 0);	/* parity check is disable */
  
  	/*
  	 * initialize MISC_WRRD register
  	 * 
  	 * Note: Designated parameters is obeyed as following:
  	 *	MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
  	 *	MISC_MASTER_TERMINATION_SELECT:      It must be set.
  	 *	MISC_BMREQ_NEGATE_TIMING_SEL:	     It should be set.
  	 *	MISC_AUTOSEL_TIMING_SEL:	     It should be set.
  	 *	MISC_BMSTOP_CHANGE2_NONDATA_PHASE:   It should be set.
  	 *	MISC_DELAYED_BMSTART:		     It's selected for safety.
  	 *
  	 * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
  	 *	we have to set TRANSFERCONTROL_BM_START as 0 and set
  	 *	appropriate value before restarting bus master transfer.
  	 */
  	nsp32_index_write2(base, MISC_WR,
  			   (SCSI_DIRECTION_DETECTOR_SELECT |
  			    DELAYED_BMSTART                |
  			    MASTER_TERMINATION_SELECT      |
  			    BMREQ_NEGATE_TIMING_SEL        |
  			    AUTOSEL_TIMING_SEL             |
  			    BMSTOP_CHANGE2_NONDATA_PHASE));
  
  	nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
  	power = nsp32_index_read1(base, TERM_PWR_CONTROL);
  	if (!(power & SENSE)) {
  		nsp32_msg(KERN_INFO, "term power on");
  		nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
  	}
  
  	nsp32_write2(base, TIMER_SET, TIMER_STOP);
  	nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
  
  	nsp32_write1(base, SYNC_REG,     0);
  	nsp32_write1(base, ACK_WIDTH,    0);
  	nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
  
  	/*
  	 * enable to select designated IRQ (except for
  	 * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
  	 */
  	nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ         |
  			                     IRQSELECT_SCSIRESET_IRQ     |
  			                     IRQSELECT_FIFO_SHLD_IRQ     |
  			                     IRQSELECT_RESELECT_IRQ      |
  			                     IRQSELECT_PHASE_CHANGE_IRQ  |
  			                     IRQSELECT_AUTO_SCSI_SEQ_IRQ |
  			                  //   IRQSELECT_BMCNTERR_IRQ      |
  			                     IRQSELECT_TARGET_ABORT_IRQ  |
  			                     IRQSELECT_MASTER_ABORT_IRQ );
  	nsp32_write2(base, IRQ_CONTROL, 0);
  
  	/* PCI LED off */
  	nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
  	nsp32_index_write1(base, EXT_PORT,     LED_OFF);
  
  	return TRUE;
  }
  
  
  /* interrupt routine */
  static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
  {
  	nsp32_hw_data *data = dev_id;
  	unsigned int base = data->BaseAddress;
  	struct scsi_cmnd *SCpnt = data->CurrentSC;
  	unsigned short auto_stat, irq_stat, trans_stat;
  	unsigned char busmon, busphase;
  	unsigned long flags;
  	int ret;
  	int handled = 0;
  	struct Scsi_Host *host = data->Host;
  
  	spin_lock_irqsave(host->host_lock, flags);
  
  	/*
  	 * IRQ check, then enable IRQ mask
  	 */
  	irq_stat = nsp32_read2(base, IRQ_STATUS);
  	nsp32_dbg(NSP32_DEBUG_INTR, 
  		  "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
  	/* is this interrupt comes from Ninja asic? */
  	if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
  		goto out2;
  	}
  	handled = 1;
  	nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
  
  	busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
  	busphase = busmon & BUSMON_PHASE_MASK;
  
  	trans_stat = nsp32_read2(base, TRANSFER_STATUS);
  	if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
  		nsp32_msg(KERN_INFO, "card disconnect");
  		if (data->CurrentSC != NULL) {
  			nsp32_msg(KERN_INFO, "clean up current SCSI command");
  			SCpnt->result = DID_BAD_TARGET << 16;
  			nsp32_scsi_done(SCpnt);
  		}
  		goto out;
  	}
  
  	/* Timer IRQ */
  	if (irq_stat & IRQSTATUS_TIMER_IRQ) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
  		nsp32_write2(base, TIMER_SET, TIMER_STOP);
  		goto out;
  	}
  
  	/* SCSI reset */
  	if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
  		nsp32_msg(KERN_INFO, "detected someone do bus reset");
  		nsp32_do_bus_reset(data);
  		if (SCpnt != NULL) {
  			SCpnt->result = DID_RESET << 16;
  			nsp32_scsi_done(SCpnt);
  		}
  		goto out;
  	}
  
  	if (SCpnt == NULL) {
  		nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
  		nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
  		goto out;
  	}
  
  	/*
  	 * AutoSCSI Interrupt.
  	 * Note: This interrupt is occurred when AutoSCSI is finished.  Then
  	 * check SCSIEXECUTEPHASE, and do appropriate action.  Each phases are
  	 * recorded when AutoSCSI sequencer has been processed.
  	 */
  	if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
  		/* getting SCSI executed phase */
  		auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
  		nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
  
  		/* Selection Timeout, go busfree phase. */
  		if (auto_stat & SELECTION_TIMEOUT) {
  			nsp32_dbg(NSP32_DEBUG_INTR,
  				  "selection timeout occurred");
  
  			SCpnt->result = DID_TIME_OUT << 16;
  			nsp32_scsi_done(SCpnt);
  			goto out;
  		}
  
  		if (auto_stat & MSGOUT_PHASE) {
  			/*
  			 * MsgOut phase was processed.
  			 * If MSG_IN_OCCUER is not set, then MsgOut phase is
  			 * completed. Thus, msgout_len must reset.  Otherwise,
  			 * nothing to do here. If MSG_OUT_OCCUER is occurred,
  			 * then we will encounter the condition and check.
  			 */
  			if (!(auto_stat & MSG_IN_OCCUER) &&
  			     (data->msgout_len <= 3)) {
  				/*
  				 * !MSG_IN_OCCUER && msgout_len <=3
  				 *   ---> AutoSCSI with MSGOUTreg is processed.
  				 */
  				data->msgout_len = 0;
  			};
  
  			nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
  		}
  
  		if ((auto_stat & DATA_IN_PHASE) &&
  		    (scsi_get_resid(SCpnt) > 0) &&
  		    ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
  			printk( "auto+fifo\n");
  			//nsp32_pio_read(SCpnt);
  		}
  
  		if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
  			/* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
  			nsp32_dbg(NSP32_DEBUG_INTR,
  				  "Data in/out phase processed");
  
  			/* read BMCNT, SGT pointer addr */
  			nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx", 
  				    nsp32_read4(base, BM_CNT));
  			nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx", 
  				    nsp32_read4(base, SGT_ADR));
  			nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx", 
  				    nsp32_read4(base, SACK_CNT));
  			nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx", 
  				    nsp32_read4(base, SAVED_SACK_CNT));
  
  			scsi_set_resid(SCpnt, 0); /* all data transfered! */
  		}
  
  		/*
  		 * MsgIn Occur
  		 */
  		if (auto_stat & MSG_IN_OCCUER) {
  			nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
  		}
  
  		/*
  		 * MsgOut Occur
  		 */
  		if (auto_stat & MSG_OUT_OCCUER) {
  			nsp32_msgout_occur(SCpnt);
  		}
  
  		/*
  		 * Bus Free Occur
  		 */
  		if (auto_stat & BUS_FREE_OCCUER) {
  			ret = nsp32_busfree_occur(SCpnt, auto_stat);
  			if (ret == TRUE) {
  				goto out;
  			}
  		}
  
  		if (auto_stat & STATUS_PHASE) {
  			/*
  			 * Read CSB and substitute CSB for SCpnt->result
  			 * to save status phase stutas byte.
  			 * scsi error handler checks host_byte (DID_*:
  			 * low level driver to indicate status), then checks 
  			 * status_byte (SCSI status byte).
  			 */
  			SCpnt->result =	(int)nsp32_read1(base, SCSI_CSB_IN);
  		}
  
  		if (auto_stat & ILLEGAL_PHASE) {
  			/* Illegal phase is detected. SACK is not back. */
  			nsp32_msg(KERN_WARNING, 
  				  "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
  
  			/* TODO: currently we don't have any action... bus reset? */
  
  			/*
  			 * To send back SACK, assert, wait, and negate.
  			 */
  			nsp32_sack_assert(data);
  			nsp32_wait_req(data, NEGATE);
  			nsp32_sack_negate(data);
  
  		}
  
  		if (auto_stat & COMMAND_PHASE) {
  			/* nothing to do */
  			nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
  		}
  
  		if (auto_stat & AUTOSCSI_BUSY) {
  			/* AutoSCSI is running */
  		}
  
  		show_autophase(auto_stat);
  	}
  
  	/* FIFO_SHLD_IRQ */
  	if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
  
  		switch(busphase) {
  		case BUSPHASE_DATA_OUT:
  			nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
  
  			//nsp32_pio_write(SCpnt);
  
  			break;
  
  		case BUSPHASE_DATA_IN:
  			nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
  
  			//nsp32_pio_read(SCpnt);
  
  			break;
  
  		case BUSPHASE_STATUS:
  			nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
  
  			SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
  
  			break;
  		default:
  			nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
  			nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
  			show_busphase(busphase);
  			break;
  		}
  
  		goto out;
  	}
  
  	/* Phase Change IRQ */
  	if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
  
  		switch(busphase) {
  		case BUSPHASE_MESSAGE_IN:
  			nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
  			nsp32_msgin_occur(SCpnt, irq_stat, 0);
  			break;
  		default:
  			nsp32_msg(KERN_WARNING, "phase chg/other phase?");
  			nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
  				  irq_stat, trans_stat);
  			show_busphase(busphase);
  			break;
  		}
  		goto out;
  	}
  
  	/* PCI_IRQ */
  	if (irq_stat & IRQSTATUS_PCI_IRQ) {
  		nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
  		/* Do nothing */
  	}
  
  	/* BMCNTERR_IRQ */
  	if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
  		nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
  		/*
  		 * TODO: To be implemented improving bus master
  		 * transfer reliability when BMCNTERR is occurred in
  		 * AutoSCSI phase described in specification.
  		 */
  	}
  
  #if 0
  	nsp32_dbg(NSP32_DEBUG_INTR,
  		  "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
  	show_busphase(busphase);
  #endif
  
   out:
  	/* disable IRQ mask */
  	nsp32_write2(base, IRQ_CONTROL, 0);
  
   out2:
  	spin_unlock_irqrestore(host->host_lock, flags);
  
  	nsp32_dbg(NSP32_DEBUG_INTR, "exit");
  
  	return IRQ_RETVAL(handled);
  }
  
  #undef SPRINTF
  #define SPRINTF(args...) \
  	do { \
  		if(length > (pos - buffer)) { \
  			pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
  			nsp32_dbg(NSP32_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length,  length - (pos - buffer));\
  		} \
  	} while(0)
  
  static int nsp32_proc_info(struct Scsi_Host *host, char *buffer, char **start,
  			   off_t offset, int length, int inout)
  {
  	char             *pos = buffer;
  	int               thislength;
  	unsigned long     flags;
  	nsp32_hw_data    *data;
  	int               hostno;
  	unsigned int      base;
  	unsigned char     mode_reg;
  	int               id, speed;
  	long              model;
  
  	/* Write is not supported, just return. */
  	if (inout == TRUE) {
  		return -EINVAL;
  	}
  
  	hostno = host->host_no;
  	data = (nsp32_hw_data *)host->hostdata;
  	base = host->io_port;
  
  	SPRINTF("NinjaSCSI-32 status\n\n");
  	SPRINTF("Driver version:        %s, $Revision: #1 $\n", nsp32_release_version);
  	SPRINTF("SCSI host No.:         %d\n",		hostno);
  	SPRINTF("IRQ:                   %d\n",		host->irq);
  	SPRINTF("IO:                    0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
  	SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n",	host->base, host->base + data->MmioLength - 1);
  	SPRINTF("sg_tablesize:          %d\n",		host->sg_tablesize);
  	SPRINTF("Chip revision:         0x%x\n",       	(nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
  
  	mode_reg = nsp32_index_read1(base, CHIP_MODE);
  	model    = data->pci_devid->driver_data;
  
  #ifdef CONFIG_PM
  	SPRINTF("Power Management:      %s\n",          (mode_reg & OPTF) ? "yes" : "no");
  #endif
  	SPRINTF("OEM:                   %ld, %s\n",     (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
  
  	spin_lock_irqsave(&(data->Lock), flags);
  	SPRINTF("CurrentSC:             0x%p\n\n",      data->CurrentSC);
  	spin_unlock_irqrestore(&(data->Lock), flags);
  
  
  	SPRINTF("SDTR status\n");
  	for (id = 0; id < ARRAY_SIZE(data->target); id++) {
  
                  SPRINTF("id %d: ", id);
  
  		if (id == host->this_id) {
  			SPRINTF("----- NinjaSCSI-32 host adapter\n");
  			continue;
  		}
  
  		if (data->target[id].sync_flag == SDTR_DONE) {
  			if (data->target[id].period == 0            &&
  			    data->target[id].offset == ASYNC_OFFSET ) {
  				SPRINTF("async");
  			} else {
  				SPRINTF(" sync");
  			}
  		} else {
  			SPRINTF(" none");
  		}
  
  		if (data->target[id].period != 0) {
  
  			speed = 1000000 / (data->target[id].period * 4);
  
  			SPRINTF(" transfer %d.%dMB/s, offset %d",
  				speed / 1000,
  				speed % 1000,
  				data->target[id].offset
  				);
  		}
  		SPRINTF("\n");
  	}
  
  
  	thislength = pos - (buffer + offset);
  
  	if(thislength < 0) {
  		*start = NULL;
                  return 0;
          }
  
  
  	thislength = min(thislength, length);
  	*start = buffer + offset;
  
  	return thislength;
  }
  #undef SPRINTF
  
  
  
  /*
   * Reset parameters and call scsi_done for data->cur_lunt.
   * Be careful setting SCpnt->result = DID_* before calling this function.
   */
  static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   base = SCpnt->device->host->io_port;
  
  	scsi_dma_unmap(SCpnt);
  
  	/*
  	 * clear TRANSFERCONTROL_BM_START
  	 */
  	nsp32_write2(base, TRANSFER_CONTROL, 0);
  	nsp32_write4(base, BM_CNT,           0);
  
  	/*
  	 * call scsi_done
  	 */
  	(*SCpnt->scsi_done)(SCpnt);
  
  	/*
  	 * reset parameters
  	 */
  	data->cur_lunt->SCpnt = NULL;
  	data->cur_lunt        = NULL;
  	data->cur_target      = NULL;
  	data->CurrentSC      = NULL;
  }
  
  
  /*
   * Bus Free Occur
   *
   * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
   * with ACK reply when below condition is matched:
   *	MsgIn 00: Command Complete.
   *	MsgIn 02: Save Data Pointer.
   *	MsgIn 04: Diconnect.
   * In other case, unexpected BUSFREE is detected.
   */
  static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int base   = SCpnt->device->host->io_port;
  
  	nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
  	show_autophase(execph);
  
  	nsp32_write4(base, BM_CNT,           0);
  	nsp32_write2(base, TRANSFER_CONTROL, 0);
  
  	/*
  	 * MsgIn 02: Save Data Pointer
  	 *
  	 * VALID:
  	 *   Save Data Pointer is received. Adjust pointer.
  	 *   
  	 * NO-VALID:
  	 *   SCSI-3 says if Save Data Pointer is not received, then we restart
  	 *   processing and we can't adjust any SCSI data pointer in next data
  	 *   phase.
  	 */
  	if (execph & MSGIN_02_VALID) {
  		nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
  
  		/*
  		 * Check sack_cnt/saved_sack_cnt, then adjust sg table if
  		 * needed.
  		 */
  		if (!(execph & MSGIN_00_VALID) && 
  		    ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
  			unsigned int sacklen, s_sacklen;
  
  			/*
  			 * Read SACK count and SAVEDSACK count, then compare.
  			 */
  			sacklen   = nsp32_read4(base, SACK_CNT      );
  			s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
  
  			/*
  			 * If SAVEDSACKCNT == 0, it means SavedDataPointer is
  			 * come after data transfering.
  			 */
  			if (s_sacklen > 0) {
  				/*
  				 * Comparing between sack and savedsack to
  				 * check the condition of AutoMsgIn03.
  				 *
  				 * If they are same, set msgin03 == TRUE,
  				 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
  				 * reselection.  On the other hand, if they
  				 * aren't same, set msgin03 == FALSE, and
  				 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
  				 * reselection.
  				 */
  				if (sacklen != s_sacklen) {
  					data->cur_lunt->msgin03 = FALSE;
  				} else {
  					data->cur_lunt->msgin03 = TRUE;
  				}
  
  				nsp32_adjust_busfree(SCpnt, s_sacklen);
  			}
  		}
  
  		/* This value has not substitude with valid value yet... */
  		//data->cur_lunt->save_datp = data->cur_datp;
  	} else {
  		/*
  		 * no processing.
  		 */
  	}
  	
  	if (execph & MSGIN_03_VALID) {
  		/* MsgIn03 was valid to be processed. No need processing. */
  	}
  
  	/*
  	 * target SDTR check
  	 */
  	if (data->cur_target->sync_flag & SDTR_INITIATOR) {
  		/*
  		 * SDTR negotiation pulled by the initiator has not
  		 * finished yet. Fall back to ASYNC mode.
  		 */
  		nsp32_set_async(data, data->cur_target);
  		data->cur_target->sync_flag &= ~SDTR_INITIATOR;
  		data->cur_target->sync_flag |= SDTR_DONE;
  	} else if (data->cur_target->sync_flag & SDTR_TARGET) {
  		/*
  		 * SDTR negotiation pulled by the target has been
  		 * negotiating.
  		 */
  		if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
  			/* 
  			 * If valid message is received, then
  			 * negotiation is succeeded.
  			 */
  		} else {
  			/*
  			 * On the contrary, if unexpected bus free is
  			 * occurred, then negotiation is failed. Fall
  			 * back to ASYNC mode.
  			 */
  			nsp32_set_async(data, data->cur_target);
  		}
  		data->cur_target->sync_flag &= ~SDTR_TARGET;
  		data->cur_target->sync_flag |= SDTR_DONE;
  	}
  
  	/*
  	 * It is always ensured by SCSI standard that initiator
  	 * switches into Bus Free Phase after
  	 * receiving message 00 (Command Complete), 04 (Disconnect).
  	 * It's the reason that processing here is valid.
  	 */
  	if (execph & MSGIN_00_VALID) {
  		/* MsgIn 00: Command Complete */
  		nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
  
  		SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
  		SCpnt->SCp.Message = 0;
  		nsp32_dbg(NSP32_DEBUG_BUSFREE, 
  			  "normal end stat=0x%x resid=0x%x\n",
  			  SCpnt->SCp.Status, scsi_get_resid(SCpnt));
  		SCpnt->result = (DID_OK             << 16) |
  			        (SCpnt->SCp.Message <<  8) |
  			        (SCpnt->SCp.Status  <<  0);
  		nsp32_scsi_done(SCpnt);
  		/* All operation is done */
  		return TRUE;
  	} else if (execph & MSGIN_04_VALID) {
  		/* MsgIn 04: Disconnect */
  		SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
  		SCpnt->SCp.Message = 4;
  		
  		nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
  		return TRUE;
  	} else {
  		/* Unexpected bus free */
  		nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
  
  		/* DID_ERROR? */
  		//SCpnt->result   = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
  		SCpnt->result = DID_ERROR << 16;
  		nsp32_scsi_done(SCpnt);
  		return TRUE;
  	}
  	return FALSE;
  }
  
  
  /*
   * nsp32_adjust_busfree - adjusting SG table
   *
   * Note: This driver adjust the SG table using SCSI ACK
   *       counter instead of BMCNT counter!
   */
  static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	int                   old_entry = data->cur_entry;
  	int                   new_entry;
  	int                   sg_num = data->cur_lunt->sg_num;
  	nsp32_sgtable *sgt    = data->cur_lunt->sglun->sgt;
  	unsigned int          restlen, sentlen;
  	u32_le                len, addr;
  
  	nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt));
  
  	/* adjust saved SACK count with 4 byte start address boundary */
  	s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
  
  	/*
  	 * calculate new_entry from sack count and each sgt[].len 
  	 * calculate the byte which is intent to send
  	 */
  	sentlen = 0;
  	for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
  		sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
  		if (sentlen > s_sacklen) {
  			break;
  		}
  	}
  
  	/* all sgt is processed */
  	if (new_entry == sg_num) {
  		goto last;
  	}
  
  	if (sentlen == s_sacklen) {
  		/* XXX: confirm it's ok or not */
  		/* In this case, it's ok because we are at 
  		   the head element of the sg. restlen is correctly calculated. */
  	}
  
  	/* calculate the rest length for transfering */
  	restlen = sentlen - s_sacklen;
  
  	/* update adjusting current SG table entry */
  	len  = le32_to_cpu(sgt[new_entry].len);
  	addr = le32_to_cpu(sgt[new_entry].addr);
  	addr += (len - restlen);
  	sgt[new_entry].addr = cpu_to_le32(addr);
  	sgt[new_entry].len  = cpu_to_le32(restlen);
  
  	/* set cur_entry with new_entry */
  	data->cur_entry = new_entry;
   
  	return;
  
   last:
  	if (scsi_get_resid(SCpnt) < sentlen) {
  		nsp32_msg(KERN_ERR, "resid underflow");
  	}
  
  	scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen);
  	nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt));
  
  	/* update hostdata and lun */
  
  	return;
  }
  
  
  /*
   * It's called MsgOut phase occur.
   * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
   * message out phase. It, however, has more than 3 messages,
   * HBA creates the interrupt and we have to process by hand.
   */
  static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int base   = SCpnt->device->host->io_port;
  	//unsigned short command;
  	long new_sgtp;
  	int i;
  	
  	nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
  		  "enter: msgout_len: 0x%x", data->msgout_len);
  
  	/*
  	 * If MsgOut phase is occurred without having any
  	 * message, then No_Operation is sent (SCSI-2).
  	 */
  	if (data->msgout_len == 0) {
  		nsp32_build_nop(SCpnt);
  	}
  
  	/*
  	 * Set SGTP ADDR current entry for restarting AUTOSCSI, 
  	 * because SGTP is incremented next point.
  	 * There is few statement in the specification...
  	 */
   	new_sgtp = data->cur_lunt->sglun_paddr + 
  		   (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
  
  	/*
  	 * send messages
  	 */
  	for (i = 0; i < data->msgout_len; i++) {
  		nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
  			  "%d : 0x%x", i, data->msgoutbuf[i]);
  
  		/*
  		 * Check REQ is asserted.
  		 */
  		nsp32_wait_req(data, ASSERT);
  
  		if (i == (data->msgout_len - 1)) {
  			/*
  			 * If the last message, set the AutoSCSI restart
  			 * before send back the ack message. AutoSCSI
  			 * restart automatically negate ATN signal.
  			 */
  			//command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
  			//nsp32_restart_autoscsi(SCpnt, command);
  			nsp32_write2(base, COMMAND_CONTROL,
  					 (CLEAR_CDB_FIFO_POINTER |
  					  AUTO_COMMAND_PHASE     |
  					  AUTOSCSI_RESTART       |
  					  AUTO_MSGIN_00_OR_04    |
  					  AUTO_MSGIN_02          ));
  		}
  		/*
  		 * Write data with SACK, then wait sack is
  		 * automatically negated.
  		 */
  		nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
  		nsp32_wait_sack(data, NEGATE);
  
  		nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
  			  nsp32_read1(base, SCSI_BUS_MONITOR));
  	};
  
  	data->msgout_len = 0;
  
  	nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
  }
  
  /*
   * Restart AutoSCSI
   *
   * Note: Restarting AutoSCSI needs set:
   *		SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
   */
  static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   base = data->BaseAddress;
  	unsigned short transfer = 0;
  
  	nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
  
  	if (data->cur_target == NULL || data->cur_lunt == NULL) {
  		nsp32_msg(KERN_ERR, "Target or Lun is invalid");
  	}
  
  	/*
  	 * set SYNC_REG
  	 * Don't set BM_START_ADR before setting this register.
  	 */
  	nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
  
  	/*
  	 * set ACKWIDTH
  	 */
  	nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
  
  	/*
  	 * set SREQ hazard killer sampling rate
  	 */
  	nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
  
  	/*
  	 * set SGT ADDR (physical address)
  	 */
  	nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
  
  	/*
  	 * set TRANSFER CONTROL REG
  	 */
  	transfer = 0;
  	transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
  	if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
  		if (scsi_bufflen(SCpnt) > 0) {
  			transfer |= BM_START;
  		}
  	} else if (data->trans_method & NSP32_TRANSFER_MMIO) {
  		transfer |= CB_MMIO_MODE;
  	} else if (data->trans_method & NSP32_TRANSFER_PIO) {
  		transfer |= CB_IO_MODE;
  	}
  	nsp32_write2(base, TRANSFER_CONTROL, transfer);
  
  	/*
  	 * restart AutoSCSI
  	 *
  	 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
  	 */
  	command |= (CLEAR_CDB_FIFO_POINTER |
  		    AUTO_COMMAND_PHASE     |
  		    AUTOSCSI_RESTART       );
  	nsp32_write2(base, COMMAND_CONTROL, command);
  
  	nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
  }
  
  
  /*
   * cannot run automatically message in occur
   */
  static void nsp32_msgin_occur(struct scsi_cmnd     *SCpnt,
  			      unsigned long  irq_status,
  			      unsigned short execph)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   base = SCpnt->device->host->io_port;
  	unsigned char  msg;
  	unsigned char  msgtype;
  	unsigned char  newlun;
  	unsigned short command  = 0;
  	int            msgclear = TRUE;
  	long           new_sgtp;
  	int            ret;
  
  	/*
  	 * read first message
  	 *    Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
  	 *    of Message-In have to be processed before sending back SCSI ACK.
  	 */
  	msg = nsp32_read1(base, SCSI_DATA_IN);
  	data->msginbuf[(unsigned char)data->msgin_len] = msg;
  	msgtype = data->msginbuf[0];
  	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
  		  "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
  		  data->msgin_len, msg, msgtype);
  
  	/*
  	 * TODO: We need checking whether bus phase is message in?
  	 */
  
  	/*
  	 * assert SCSI ACK
  	 */
  	nsp32_sack_assert(data);
  
  	/*
  	 * processing IDENTIFY
  	 */
  	if (msgtype & 0x80) {
  		if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
  			/* Invalid (non reselect) phase */
  			goto reject;
  		}
  
  		newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
  		ret = nsp32_reselection(SCpnt, newlun);
  		if (ret == TRUE) {
  			goto restart;
  		} else {
  			goto reject;
  		}
  	}
  	
  	/*
  	 * processing messages except for IDENTIFY
  	 *
  	 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
  	 */
  	switch (msgtype) {
  	/*
  	 * 1-byte message
  	 */
  	case COMMAND_COMPLETE:
  	case DISCONNECT:
  		/*
  		 * These messages should not be occurred.
  		 * They should be processed on AutoSCSI sequencer.
  		 */
  		nsp32_msg(KERN_WARNING, 
  			   "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
  		break;
  		
  	case RESTORE_POINTERS:
  		/*
  		 * AutoMsgIn03 is disabled, and HBA gets this message.
  		 */
  
  		if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
  			unsigned int s_sacklen;
  
  			s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
  			if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
  				nsp32_adjust_busfree(SCpnt, s_sacklen);
  			} else {
  				/* No need to rewrite SGT */
  			}
  		}
  		data->cur_lunt->msgin03 = FALSE;
  
  		/* Update with the new value */
  
  		/* reset SACK/SavedACK counter (or ALL clear?) */
  		nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
  
  		/*
  		 * set new sg pointer
  		 */
  		new_sgtp = data->cur_lunt->sglun_paddr + 
  			(data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
  		nsp32_write4(base, SGT_ADR, new_sgtp);
  
  		break;
  
  	case SAVE_POINTERS:
  		/*
  		 * These messages should not be occurred.
  		 * They should be processed on AutoSCSI sequencer.
  		 */
  		nsp32_msg (KERN_WARNING, 
  			   "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
  		
  		break;
  		
  	case MESSAGE_REJECT:
  		/* If previous message_out is sending SDTR, and get 
  		   message_reject from target, SDTR negotiation is failed */
  		if (data->cur_target->sync_flag &
  				(SDTR_INITIATOR | SDTR_TARGET)) {
  			/*
  			 * Current target is negotiating SDTR, but it's
  			 * failed.  Fall back to async transfer mode, and set
  			 * SDTR_DONE.
  			 */
  			nsp32_set_async(data, data->cur_target);
  			data->cur_target->sync_flag &= ~SDTR_INITIATOR;
  			data->cur_target->sync_flag |= SDTR_DONE;
  
  		}
  		break;
  
  	case LINKED_CMD_COMPLETE:
  	case LINKED_FLG_CMD_COMPLETE:
  		/* queue tag is not supported currently */
  		nsp32_msg (KERN_WARNING, 
  			   "unsupported message: 0x%x", msgtype);
  		break;
  
  	case INITIATE_RECOVERY:
  		/* staring ECA (Extended Contingent Allegiance) state. */
  		/* This message is declined in SPI2 or later. */
  
  		goto reject;
  
  	/*
  	 * 2-byte message
  	 */
  	case SIMPLE_QUEUE_TAG:
  	case 0x23:
  		/*
  		 * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
  		 * No support is needed.
  		 */
  		if (data->msgin_len >= 1) {
  			goto reject;
  		}
  
  		/* current position is 1-byte of 2 byte */
  		msgclear = FALSE;
  
  		break;
  
  	/*
  	 * extended message
  	 */
  	case EXTENDED_MESSAGE:
  		if (data->msgin_len < 1) {
  			/*
  			 * Current position does not reach 2-byte
  			 * (2-byte is extended message length).
  			 */
  			msgclear = FALSE;
  			break;
  		}
  
  		if ((data->msginbuf[1] + 1) > data->msgin_len) {
  			/*
  			 * Current extended message has msginbuf[1] + 2
  			 * (msgin_len starts counting from 0, so buf[1] + 1).
  			 * If current message position is not finished,
  			 * continue receiving message.
  			 */
  			msgclear = FALSE;
  			break;
  		}
  
  		/*
  		 * Reach here means regular length of each type of 
  		 * extended messages.
  		 */
  		switch (data->msginbuf[2]) {
  		case EXTENDED_MODIFY_DATA_POINTER:
  			/* TODO */
  			goto reject; /* not implemented yet */
  			break;
  
  		case EXTENDED_SDTR:
  			/*
  			 * Exchange this message between initiator and target.
  			 */
  			if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
  				/*
  				 * received inappropriate message.
  				 */
  				goto reject;
  				break;
  			}
  
  			nsp32_analyze_sdtr(SCpnt);
  
  			break;
  
  		case EXTENDED_EXTENDED_IDENTIFY:
  			/* SCSI-I only, not supported. */
  			goto reject; /* not implemented yet */
  
  			break;
  
  		case EXTENDED_WDTR:
  			goto reject; /* not implemented yet */
  
  			break;
  			
  		default:
  			goto reject;
  		}
  		break;
  		
  	default:
  		goto reject;
  	}
  
   restart:
  	if (msgclear == TRUE) {
  		data->msgin_len = 0;
  
  		/*
  		 * If restarting AutoSCSI, but there are some message to out
  		 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
  		 * (MV_VALID = 0). When commandcontrol is written with
  		 * AutoSCSI restart, at the same time MsgOutOccur should be
  		 * happened (however, such situation is really possible...?).
  		 */
  		if (data->msgout_len > 0) {	
  			nsp32_write4(base, SCSI_MSG_OUT, 0);
  			command |= AUTO_ATN;
  		}
  
  		/*
  		 * restart AutoSCSI
  		 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
  		 */
  		command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
  
  		/*
  		 * If current msgin03 is TRUE, then flag on.
  		 */
  		if (data->cur_lunt->msgin03 == TRUE) {
  			command |= AUTO_MSGIN_03;
  		}
  		data->cur_lunt->msgin03 = FALSE;
  	} else {
  		data->msgin_len++;
  	}
  
  	/*
  	 * restart AutoSCSI
  	 */
  	nsp32_restart_autoscsi(SCpnt, command);
  
  	/*
  	 * wait SCSI REQ negate for REQ-ACK handshake
  	 */
  	nsp32_wait_req(data, NEGATE);
  
  	/*
  	 * negate SCSI ACK
  	 */
  	nsp32_sack_negate(data);
  
  	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
  
  	return;
  
   reject:
  	nsp32_msg(KERN_WARNING, 
  		  "invalid or unsupported MessageIn, rejected. "
  		  "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
  		  msg, data->msgin_len, msgtype);
  	nsp32_build_reject(SCpnt);
  	data->msgin_len = 0;
  
  	goto restart;
  }
  
  /*
   * 
   */
  static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data   *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	nsp32_target     *target     = data->cur_target;
  	nsp32_sync_table *synct;
  	unsigned char     get_period = data->msginbuf[3];
  	unsigned char     get_offset = data->msginbuf[4];
  	int               entry;
  	int               syncnum;
  
  	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
  
  	synct   = data->synct;
  	syncnum = data->syncnum;
  
  	/*
  	 * If this inititor sent the SDTR message, then target responds SDTR,
  	 * initiator SYNCREG, ACKWIDTH from SDTR parameter.
  	 * Messages are not appropriate, then send back reject message.
  	 * If initiator did not send the SDTR, but target sends SDTR, 
  	 * initiator calculator the appropriate parameter and send back SDTR.
  	 */	
  	if (target->sync_flag & SDTR_INITIATOR) {
  		/*
  		 * Initiator sent SDTR, the target responds and
  		 * send back negotiation SDTR.
  		 */
  		nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
  	
  		target->sync_flag &= ~SDTR_INITIATOR;
  		target->sync_flag |= SDTR_DONE;
  
  		/*
  		 * offset:
  		 */
  		if (get_offset > SYNC_OFFSET) {
  			/*
  			 * Negotiation is failed, the target send back
  			 * unexpected offset value.
  			 */
  			goto reject;
  		}
  		
  		if (get_offset == ASYNC_OFFSET) {
  			/*
  			 * Negotiation is succeeded, the target want
  			 * to fall back into asynchronous transfer mode.
  			 */
  			goto async;
  		}
  
  		/*
  		 * period:
  		 *    Check whether sync period is too short. If too short,
  		 *    fall back to async mode. If it's ok, then investigate
  		 *    the received sync period. If sync period is acceptable
  		 *    between sync table start_period and end_period, then
  		 *    set this I_T nexus as sent offset and period.
  		 *    If it's not acceptable, send back reject and fall back
  		 *    to async mode.
  		 */
  		if (get_period < data->synct[0].period_num) {
  			/*
  			 * Negotiation is failed, the target send back
  			 * unexpected period value.
  			 */
  			goto reject;
  		}
  
  		entry = nsp32_search_period_entry(data, target, get_period);
  
  		if (entry < 0) {
  			/*
  			 * Target want to use long period which is not 
  			 * acceptable NinjaSCSI-32Bi/UDE.
  			 */
  			goto reject;
  		}
  
  		/*
  		 * Set new sync table and offset in this I_T nexus.
  		 */
  		nsp32_set_sync_entry(data, target, entry, get_offset);
  	} else {
  		/* Target send SDTR to initiator. */
  		nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
  	
  		target->sync_flag |= SDTR_INITIATOR;
  
  		/* offset: */
  		if (get_offset > SYNC_OFFSET) {
  			/* send back as SYNC_OFFSET */
  			get_offset = SYNC_OFFSET;
  		}
  
  		/* period: */
  		if (get_period < data->synct[0].period_num) {
  			get_period = data->synct[0].period_num;
  		}
  
  		entry = nsp32_search_period_entry(data, target, get_period);
  
  		if (get_offset == ASYNC_OFFSET || entry < 0) {
  			nsp32_set_async(data, target);
  			nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
  		} else {
  			nsp32_set_sync_entry(data, target, entry, get_offset);
  			nsp32_build_sdtr(SCpnt, get_period, get_offset);
  		}
  	}
  
  	target->period = get_period;
  	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
  	return;
  
   reject:
  	/*
  	 * If the current message is unacceptable, send back to the target
  	 * with reject message.
  	 */
  	nsp32_build_reject(SCpnt);
  
   async:
  	nsp32_set_async(data, target);	/* set as ASYNC transfer mode */
  
  	target->period = 0;
  	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
  	return;
  }
  
  
  /*
   * Search config entry number matched in sync_table from given
   * target and speed period value. If failed to search, return negative value.
   */
  static int nsp32_search_period_entry(nsp32_hw_data *data,
  				     nsp32_target  *target,
  				     unsigned char  period)
  {
  	int i;
  
  	if (target->limit_entry >= data->syncnum) {
  		nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
  		target->limit_entry = 0;
  	}
  
  	for (i = target->limit_entry; i < data->syncnum; i++) {
  		if (period >= data->synct[i].start_period &&
  		    period <= data->synct[i].end_period) {
  				break;
  		}
  	}
  
  	/*
  	 * Check given period value is over the sync_table value.
  	 * If so, return max value.
  	 */
  	if (i == data->syncnum) {
  		i = -1;
  	}
  
  	return i;
  }
  
  
  /*
   * target <-> initiator use ASYNC transfer
   */
  static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
  {
  	unsigned char period = data->synct[target->limit_entry].period_num;
  
  	target->offset     = ASYNC_OFFSET;
  	target->period     = 0;
  	target->syncreg    = TO_SYNCREG(period, ASYNC_OFFSET);
  	target->ackwidth   = 0;
  	target->sample_reg = 0;
  
  	nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
  }
  
  
  /*
   * target <-> initiator use maximum SYNC transfer
   */
  static void nsp32_set_max_sync(nsp32_hw_data *data,
  			       nsp32_target  *target,
  			       unsigned char *period,
  			       unsigned char *offset)
  {
  	unsigned char period_num, ackwidth;
  
  	period_num = data->synct[target->limit_entry].period_num;
  	*period    = data->synct[target->limit_entry].start_period;
  	ackwidth   = data->synct[target->limit_entry].ackwidth;
  	*offset    = SYNC_OFFSET;
  
  	target->syncreg    = TO_SYNCREG(period_num, *offset);
  	target->ackwidth   = ackwidth;
  	target->offset     = *offset;
  	target->sample_reg = 0;       /* disable SREQ sampling */
  }
  
  
  /*
   * target <-> initiator use entry number speed
   */
  static void nsp32_set_sync_entry(nsp32_hw_data *data,
  				 nsp32_target  *target,
  				 int            entry,
  				 unsigned char  offset)
  {
  	unsigned char period, ackwidth, sample_rate;
  
  	period      = data->synct[entry].period_num;
  	ackwidth    = data->synct[entry].ackwidth;
  	offset      = offset;
  	sample_rate = data->synct[entry].sample_rate;
  
  	target->syncreg    = TO_SYNCREG(period, offset);
  	target->ackwidth   = ackwidth;
  	target->offset     = offset;
  	target->sample_reg = sample_rate | SAMPLING_ENABLE;
  
  	nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
  }
  
  
  /*
   * It waits until SCSI REQ becomes assertion or negation state.
   *
   * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
   *     connected target responds SCSI REQ negation.  We have to wait
   *     SCSI REQ becomes negation in order to negate SCSI ACK signal for
   *     REQ-ACK handshake.
   */
  static void nsp32_wait_req(nsp32_hw_data *data, int state)
  {
  	unsigned int  base      = data->BaseAddress;
  	int           wait_time = 0;
  	unsigned char bus, req_bit;
  
  	if (!((state == ASSERT) || (state == NEGATE))) {
  		nsp32_msg(KERN_ERR, "unknown state designation");
  	}
  	/* REQ is BIT(5) */
  	req_bit = (state == ASSERT ? BUSMON_REQ : 0);
  
  	do {
  		bus = nsp32_read1(base, SCSI_BUS_MONITOR);
  		if ((bus & BUSMON_REQ) == req_bit) {
  			nsp32_dbg(NSP32_DEBUG_WAIT, 
  				  "wait_time: %d", wait_time);
  			return;
  		}
  		udelay(1);
  		wait_time++;
  	} while (wait_time < REQSACK_TIMEOUT_TIME);
  
  	nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
  }
  
  /*
   * It waits until SCSI SACK becomes assertion or negation state.
   */
  static void nsp32_wait_sack(nsp32_hw_data *data, int state)
  {
  	unsigned int  base      = data->BaseAddress;
  	int           wait_time = 0;
  	unsigned char bus, ack_bit;
  
  	if (!((state == ASSERT) || (state == NEGATE))) {
  		nsp32_msg(KERN_ERR, "unknown state designation");
  	}
  	/* ACK is BIT(4) */
  	ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
  
  	do {
  		bus = nsp32_read1(base, SCSI_BUS_MONITOR);
  		if ((bus & BUSMON_ACK) == ack_bit) {
  			nsp32_dbg(NSP32_DEBUG_WAIT,
  				  "wait_time: %d", wait_time);
  			return;
  		}
  		udelay(1);
  		wait_time++;
  	} while (wait_time < REQSACK_TIMEOUT_TIME);
  
  	nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
  }
  
  /*
   * assert SCSI ACK
   *
   * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
   */
  static void nsp32_sack_assert(nsp32_hw_data *data)
  {
  	unsigned int  base = data->BaseAddress;
  	unsigned char busctrl;
  
  	busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
  	busctrl	|= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
  	nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
  }
  
  /*
   * negate SCSI ACK
   */
  static void nsp32_sack_negate(nsp32_hw_data *data)
  {
  	unsigned int  base = data->BaseAddress;
  	unsigned char busctrl;
  
  	busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
  	busctrl	&= ~BUSCTL_ACK;
  	nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
  }
  
  
  
  /*
   * Note: n_io_port is defined as 0x7f because I/O register port is
   *	 assigned as:
   *	0x800-0x8ff: memory mapped I/O port
   *	0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
   *	0xc00-0xfff: CardBus status registers
   */
  static int nsp32_detect(struct pci_dev *pdev)
  {
  	struct Scsi_Host *host;	/* registered host structure */
  	struct resource  *res;
  	nsp32_hw_data    *data;
  	int               ret;
  	int               i, j;
  
  	nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
  
  	/*
  	 * register this HBA as SCSI device
  	 */
  	host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
  	if (host == NULL) {
  		nsp32_msg (KERN_ERR, "failed to scsi register");
  		goto err;
  	}
  
  	/*
  	 * set nsp32_hw_data
  	 */
  	data = (nsp32_hw_data *)host->hostdata;
  
  	memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
  
  	host->irq       = data->IrqNumber;
  	host->io_port   = data->BaseAddress;
  	host->unique_id = data->BaseAddress;
  	host->n_io_port	= data->NumAddress;
  	host->base      = (unsigned long)data->MmioAddress;
  
  	data->Host      = host;
  	spin_lock_init(&(data->Lock));
  
  	data->cur_lunt   = NULL;
  	data->cur_target = NULL;
  
  	/*
  	 * Bus master transfer mode is supported currently.
  	 */
  	data->trans_method = NSP32_TRANSFER_BUSMASTER;
  
  	/*
  	 * Set clock div, CLOCK_4 (HBA has own external clock, and
  	 * dividing * 100ns/4).
  	 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
  	 */
  	data->clock = CLOCK_4;
  
  	/*
  	 * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
  	 */
  	switch (data->clock) {
  	case CLOCK_4:
  		/* If data->clock is CLOCK_4, then select 40M sync table. */
  		data->synct   = nsp32_sync_table_40M;
  		data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
  		break;
  	case CLOCK_2:
  		/* If data->clock is CLOCK_2, then select 20M sync table. */
  		data->synct   = nsp32_sync_table_20M;
  		data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
  		break;
  	case PCICLK:
  		/* If data->clock is PCICLK, then select pci sync table. */
  		data->synct   = nsp32_sync_table_pci;
  		data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
  		break;
  	default:
  		nsp32_msg(KERN_WARNING,
  			  "Invalid clock div is selected, set CLOCK_4.");
  		/* Use default value CLOCK_4 */
  		data->clock   = CLOCK_4;
  		data->synct   = nsp32_sync_table_40M;
  		data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
  	}
  
  	/*
  	 * setup nsp32_lunt
  	 */
  
  	/*
  	 * setup DMA 
  	 */
  	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
  		nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
  		goto scsi_unregister;
  	}
  
  	/*
  	 * allocate autoparam DMA resource.
  	 */
  	data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr));
  	if (data->autoparam == NULL) {
  		nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
  		goto scsi_unregister;
  	}
  
  	/*
  	 * allocate scatter-gather DMA resource.
  	 */
  	data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE,
  					     &(data->sg_paddr));
  	if (data->sg_list == NULL) {
  		nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
  		goto free_autoparam;
  	}
  
  	for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
  		for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
  			int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
  			nsp32_lunt tmp = {
  				.SCpnt       = NULL,
  				.save_datp   = 0,
  				.msgin03     = FALSE,
  				.sg_num      = 0,
  				.cur_entry   = 0,
  				.sglun       = &(data->sg_list[offset]),
  				.sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
  			};
  
  			data->lunt[i][j] = tmp;
  		}
  	}
  
  	/*
  	 * setup target
  	 */
  	for (i = 0; i < ARRAY_SIZE(data->target); i++) {
  		nsp32_target *target = &(data->target[i]);
  
  		target->limit_entry  = 0;
  		target->sync_flag    = 0;
  		nsp32_set_async(data, target);
  	}
  
  	/*
  	 * EEPROM check
  	 */
  	ret = nsp32_getprom_param(data);
  	if (ret == FALSE) {
  		data->resettime = 3;	/* default 3 */
  	}
  
  	/*
  	 * setup HBA
  	 */
  	nsp32hw_init(data);
  
  	snprintf(data->info_str, sizeof(data->info_str),
  		 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
  		 host->irq, host->io_port, host->n_io_port);
  
  	/*
  	 * SCSI bus reset
  	 *
  	 * Note: It's important to reset SCSI bus in initialization phase.
  	 *     NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
  	 *     system is coming up, so SCSI devices connected to HBA is set as
  	 *     un-asynchronous mode.  It brings the merit that this HBA is
  	 *     ready to start synchronous transfer without any preparation,
  	 *     but we are difficult to control transfer speed.  In addition,
  	 *     it prevents device transfer speed from effecting EEPROM start-up
  	 *     SDTR.  NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
  	 *     Auto Mode, then FAST-10M is selected when SCSI devices are
  	 *     connected same or more than 4 devices.  It should be avoided
  	 *     depending on this specification. Thus, resetting the SCSI bus
  	 *     restores all connected SCSI devices to asynchronous mode, then
  	 *     this driver set SDTR safely later, and we can control all SCSI
  	 *     device transfer mode.
  	 */
  	nsp32_do_bus_reset(data);
  
  	ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data);
  	if (ret < 0) {
  		nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
  			  "SCSI PCI controller. Interrupt: %d", host->irq);
  		goto free_sg_list;
  	}
  
          /*
           * PCI IO register
           */
  	res = request_region(host->io_port, host->n_io_port, "nsp32");
  	if (res == NULL) {
  		nsp32_msg(KERN_ERR, 
  			  "I/O region 0x%lx+0x%lx is already used",
  			  data->BaseAddress, data->NumAddress);
  		goto free_irq;
          }
  
  	ret = scsi_add_host(host, &pdev->dev);
  	if (ret) {
  		nsp32_msg(KERN_ERR, "failed to add scsi host");
  		goto free_region;
  	}
  	scsi_scan_host(host);
  	pci_set_drvdata(pdev, host);
  	return 0;
  
   free_region:
  	release_region(host->io_port, host->n_io_port);
  
   free_irq:
  	free_irq(host->irq, data);
  
   free_sg_list:
  	pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE,
  			    data->sg_list, data->sg_paddr);
  
   free_autoparam:
  	pci_free_consistent(pdev, sizeof(nsp32_autoparam),
  			    data->autoparam, data->auto_paddr);
  	
   scsi_unregister:
  	scsi_host_put(host);
  
   err:
  	return 1;
  }
  
  static int nsp32_release(struct Scsi_Host *host)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
  
  	if (data->autoparam) {
  		pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
  				    data->autoparam, data->auto_paddr);
  	}
  
  	if (data->sg_list) {
  		pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
  				    data->sg_list, data->sg_paddr);
  	}
  
  	if (host->irq) {
  		free_irq(host->irq, data);
  	}
  
  	if (host->io_port && host->n_io_port) {
  		release_region(host->io_port, host->n_io_port);
  	}
  
  	if (data->MmioAddress) {
  		iounmap(data->MmioAddress);
  	}
  
  	return 0;
  }
  
  static const char *nsp32_info(struct Scsi_Host *shpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
  
  	return data->info_str;
  }
  
  
  /****************************************************************************
   * error handler
   */
  static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   base = SCpnt->device->host->io_port;
  
  	nsp32_msg(KERN_WARNING, "abort");
  
  	if (data->cur_lunt->SCpnt == NULL) {
  		nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
  		return FAILED;
  	}
  
  	if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
  		/* reset SDTR negotiation */
  		data->cur_target->sync_flag = 0;
  		nsp32_set_async(data, data->cur_target);
  	}
  
  	nsp32_write2(base, TRANSFER_CONTROL, 0);
  	nsp32_write2(base, BM_CNT,           0);
  
  	SCpnt->result = DID_ABORT << 16;
  	nsp32_scsi_done(SCpnt);
  
  	nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
  	return SUCCESS;
  }
  
  static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
  {
  	nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
  	unsigned int   base = SCpnt->device->host->io_port;
  
  	spin_lock_irq(SCpnt->device->host->host_lock);
  
  	nsp32_msg(KERN_INFO, "Bus Reset");	
  	nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
  
  	nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
  	nsp32_do_bus_reset(data);
  	nsp32_write2(base, IRQ_CONTROL, 0);
  
  	spin_unlock_irq(SCpnt->device->host->host_lock);
  	return SUCCESS;	/* SCSI bus reset is succeeded at any time. */
  }
  
  static void nsp32_do_bus_reset(nsp32_hw_data *data)
  {
  	unsigned int   base = data->BaseAddress;
  	unsigned short intrdat;
  	int i;
  
  	nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
  
  	/*
  	 * stop all transfer
  	 * clear TRANSFERCONTROL_BM_START
  	 * clear counter
  	 */
  	nsp32_write2(base, TRANSFER_CONTROL, 0);
  	nsp32_write4(base, BM_CNT,           0);
  	nsp32_write4(base, CLR_COUNTER,      CLRCOUNTER_ALLMASK);
  
  	/*
  	 * fall back to asynchronous transfer mode
  	 * initialize SDTR negotiation flag
  	 */
  	for (i = 0; i < ARRAY_SIZE(data->target); i++) {
  		nsp32_target *target = &data->target[i];
  
  		target->sync_flag = 0;
  		nsp32_set_async(data, target);
  	}
  
  	/*
  	 * reset SCSI bus
  	 */
  	nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
  	udelay(RESET_HOLD_TIME);
  	nsp32_write1(base, SCSI_BUS_CONTROL, 0);
  	for(i = 0; i < 5; i++) {
  		intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
  		nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
          }
  
  	data->CurrentSC = NULL;
  }
  
  static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
  {
  	struct Scsi_Host *host = SCpnt->device->host;
  	unsigned int      base = SCpnt->device->host->io_port;
  	nsp32_hw_data    *data = (nsp32_hw_data *)host->hostdata;
  
  	nsp32_msg(KERN_INFO, "Host Reset");	
  	nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
  
  	spin_lock_irq(SCpnt->device->host->host_lock);
  
  	nsp32hw_init(data);
  	nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
  	nsp32_do_bus_reset(data);
  	nsp32_write2(base, IRQ_CONTROL, 0);
  
  	spin_unlock_irq(SCpnt->device->host->host_lock);
  	return SUCCESS;	/* Host reset is succeeded at any time. */
  }
  
  
  /**************************************************************************
   * EEPROM handler
   */
  
  /*
   * getting EEPROM parameter
   */
  static int nsp32_getprom_param(nsp32_hw_data *data)
  {
  	int vendor = data->pci_devid->vendor;
  	int device = data->pci_devid->device;
  	int ret, val, i;
  
  	/*
  	 * EEPROM checking.
  	 */
  	ret = nsp32_prom_read(data, 0x7e);
  	if (ret != 0x55) {
  		nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
  		return FALSE;
  	}
  	ret = nsp32_prom_read(data, 0x7f);
  	if (ret != 0xaa) {
  		nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
  		return FALSE;
  	}
  
  	/*
  	 * check EEPROM type
  	 */
  	if (vendor == PCI_VENDOR_ID_WORKBIT &&
  	    device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
  		ret = nsp32_getprom_c16(data);
  	} else if (vendor == PCI_VENDOR_ID_WORKBIT &&
  		   device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
  		ret = nsp32_getprom_at24(data);
  	} else if (vendor == PCI_VENDOR_ID_WORKBIT &&
  		   device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
  		ret = nsp32_getprom_at24(data);
  	} else {
  		nsp32_msg(KERN_WARNING, "Unknown EEPROM");
  		ret = FALSE;
  	}
  
  	/* for debug : SPROM data full checking */
  	for (i = 0; i <= 0x1f; i++) {
  		val = nsp32_prom_read(data, i);
  		nsp32_dbg(NSP32_DEBUG_EEPROM,
  			  "rom address 0x%x : 0x%x", i, val);
  	}
  
  	return ret;
  }
  
  
  /*
   * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
   *
   *   ROMADDR
   *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
   *			Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
   *   0x07        :  HBA Synchronous Transfer Period
   *			Value 0: AutoSync, 1: Manual Setting
   *   0x08 - 0x0f :  Not Used? (0x0)
   *   0x10        :  Bus Termination
   * 			Value 0: Auto[ON], 1: ON, 2: OFF
   *   0x11        :  Not Used? (0)
   *   0x12        :  Bus Reset Delay Time (0x03)
   *   0x13        :  Bootable CD Support
   *			Value 0: Disable, 1: Enable
   *   0x14        :  Device Scan
   *			Bit   7  6  5  4  3  2  1  0
   *			      |  <----------------->
   * 			      |    SCSI ID: Value 0: Skip, 1: YES
   *			      |->  Value 0: ALL scan,  Value 1: Manual
   *   0x15 - 0x1b :  Not Used? (0)
   *   0x1c        :  Constant? (0x01) (clock div?)
   *   0x1d - 0x7c :  Not Used (0xff)
   *   0x7d	 :  Not Used? (0xff)
   *   0x7e        :  Constant (0x55), Validity signature
   *   0x7f        :  Constant (0xaa), Validity signature
   */
  static int nsp32_getprom_at24(nsp32_hw_data *data)
  {
  	int           ret, i;
  	int           auto_sync;
  	nsp32_target *target;
  	int           entry;
  
  	/*
  	 * Reset time which is designated by EEPROM.
  	 *
  	 * TODO: Not used yet.
  	 */
  	data->resettime = nsp32_prom_read(data, 0x12);
  
  	/*
  	 * HBA Synchronous Transfer Period
  	 *
  	 * Note: auto_sync = 0: auto, 1: manual.  Ninja SCSI HBA spec says
  	 *	that if auto_sync is 0 (auto), and connected SCSI devices are
  	 *	same or lower than 3, then transfer speed is set as ULTRA-20M.
  	 *	On the contrary if connected SCSI devices are same or higher
  	 *	than 4, then transfer speed is set as FAST-10M.
  	 *
  	 *	I break this rule. The number of connected SCSI devices are
  	 *	only ignored. If auto_sync is 0 (auto), then transfer speed is
  	 *	forced as ULTRA-20M.
  	 */
  	ret = nsp32_prom_read(data, 0x07);
  	switch (ret) {
  	case 0:
  		auto_sync = TRUE;
  		break;
  	case 1:
  		auto_sync = FALSE;
  		break;
  	default:
  		nsp32_msg(KERN_WARNING,
  			  "Unsupported Auto Sync mode. Fall back to manual mode.");
  		auto_sync = TRUE;
  	}
  
  	if (trans_mode == ULTRA20M_MODE) {
  		auto_sync = TRUE;
  	}
  
  	/*
  	 * each device Synchronous Transfer Period
  	 */
  	for (i = 0; i < NSP32_HOST_SCSIID; i++) {
  		target = &data->target[i];
  		if (auto_sync == TRUE) {
  			target->limit_entry = 0;   /* set as ULTRA20M */
  		} else {
  			ret   = nsp32_prom_read(data, i);
  			entry = nsp32_search_period_entry(data, target, ret);
  			if (entry < 0) {
  				/* search failed... set maximum speed */
  				entry = 0;
  			}
  			target->limit_entry = entry;
  		}
  	}
  
  	return TRUE;
  }
  
  
  /*
   * C16 110 (I-O Data: SC-NBD) data map:
   *
   *   ROMADDR
   *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
   *			Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
   *   0x07        :  0 (HBA Synchronous Transfer Period: Auto Sync)
   *   0x08 - 0x0f :  Not Used? (0x0)
   *   0x10        :  Transfer Mode
   *			Value 0: PIO, 1: Busmater
   *   0x11        :  Bus Reset Delay Time (0x00-0x20)
   *   0x12        :  Bus Termination
   * 			Value 0: Disable, 1: Enable
   *   0x13 - 0x19 :  Disconnection
   *			Value 0: Disable, 1: Enable
   *   0x1a - 0x7c :  Not Used? (0)
   *   0x7d	 :  Not Used? (0xf8)
   *   0x7e        :  Constant (0x55), Validity signature
   *   0x7f        :  Constant (0xaa), Validity signature
   */
  static int nsp32_getprom_c16(nsp32_hw_data *data)
  {
  	int           ret, i;
  	nsp32_target *target;
  	int           entry, val;
  
  	/*
  	 * Reset time which is designated by EEPROM.
  	 *
  	 * TODO: Not used yet.
  	 */
  	data->resettime = nsp32_prom_read(data, 0x11);
  
  	/*
  	 * each device Synchronous Transfer Period
  	 */
  	for (i = 0; i < NSP32_HOST_SCSIID; i++) {
  		target = &data->target[i];
  		ret = nsp32_prom_read(data, i);
  		switch (ret) {
  		case 0:		/* 20MB/s */
  			val = 0x0c;
  			break;
  		case 1:		/* 10MB/s */
  			val = 0x19;
  			break;
  		case 2:		/* 5MB/s */
  			val = 0x32;
  			break;
  		case 3:		/* ASYNC */
  			val = 0x00;
  			break;
  		default:	/* default 20MB/s */
  			val = 0x0c;
  			break;
  		}
  		entry = nsp32_search_period_entry(data, target, val);
  		if (entry < 0 || trans_mode == ULTRA20M_MODE) {
  			/* search failed... set maximum speed */
  			entry = 0;
  		}
  		target->limit_entry = entry;
  	}
  
  	return TRUE;
  }
  
  
  /*
   * Atmel AT24C01A (drived in 5V) serial EEPROM routines
   */
  static int nsp32_prom_read(nsp32_hw_data *data, int romaddr)
  {
  	int i, val;
  
  	/* start condition */
  	nsp32_prom_start(data);
  
  	/* device address */
  	nsp32_prom_write_bit(data, 1);	/* 1 */
  	nsp32_prom_write_bit(data, 0);	/* 0 */
  	nsp32_prom_write_bit(data, 1);	/* 1 */
  	nsp32_prom_write_bit(data, 0);	/* 0 */
  	nsp32_prom_write_bit(data, 0);	/* A2: 0 (GND) */
  	nsp32_prom_write_bit(data, 0);	/* A1: 0 (GND) */
  	nsp32_prom_write_bit(data, 0);	/* A0: 0 (GND) */
  
  	/* R/W: W for dummy write */
  	nsp32_prom_write_bit(data, 0);
  
  	/* ack */
  	nsp32_prom_write_bit(data, 0);
  
  	/* word address */
  	for (i = 7; i >= 0; i--) {
  		nsp32_prom_write_bit(data, ((romaddr >> i) & 1));
  	}
  
  	/* ack */
  	nsp32_prom_write_bit(data, 0);
  
  	/* start condition */
  	nsp32_prom_start(data);
  
  	/* device address */
  	nsp32_prom_write_bit(data, 1);	/* 1 */
  	nsp32_prom_write_bit(data, 0);	/* 0 */
  	nsp32_prom_write_bit(data, 1);	/* 1 */
  	nsp32_prom_write_bit(data, 0);	/* 0 */
  	nsp32_prom_write_bit(data, 0);	/* A2: 0 (GND) */
  	nsp32_prom_write_bit(data, 0);	/* A1: 0 (GND) */
  	nsp32_prom_write_bit(data, 0);	/* A0: 0 (GND) */
  
  	/* R/W: R */
  	nsp32_prom_write_bit(data, 1);
  
  	/* ack */
  	nsp32_prom_write_bit(data, 0);
  
  	/* data... */
  	val = 0;
  	for (i = 7; i >= 0; i--) {
  		val += (nsp32_prom_read_bit(data) << i);
  	}
  	
  	/* no ack */
  	nsp32_prom_write_bit(data, 1);
  
  	/* stop condition */
  	nsp32_prom_stop(data);
  
  	return val;
  }
  
  static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val)
  {
  	int base = data->BaseAddress;
  	int tmp;
  
  	tmp = nsp32_index_read1(base, SERIAL_ROM_CTL);
  
  	if (val == 0) {
  		tmp &= ~bit;
  	} else {
  		tmp |=  bit;
  	}
  
  	nsp32_index_write1(base, SERIAL_ROM_CTL, tmp);
  
  	udelay(10);
  }
  
  static int nsp32_prom_get(nsp32_hw_data *data, int bit)
  {
  	int base = data->BaseAddress;
  	int tmp, ret;
  
  	if (bit != SDA) {
  		nsp32_msg(KERN_ERR, "return value is not appropriate");
  		return 0;
  	}
  
  
  	tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit;
  
  	if (tmp == 0) {
  		ret = 0;
  	} else {
  		ret = 1;
  	}
  
  	udelay(10);
  
  	return ret;
  }
  
  static void nsp32_prom_start (nsp32_hw_data *data)
  {
  	/* start condition */
  	nsp32_prom_set(data, SCL, 1);
  	nsp32_prom_set(data, SDA, 1);
  	nsp32_prom_set(data, ENA, 1);	/* output mode */
  	nsp32_prom_set(data, SDA, 0);	/* keeping SCL=1 and transiting
  					 * SDA 1->0 is start condition */
  	nsp32_prom_set(data, SCL, 0);
  }
  
  static void nsp32_prom_stop (nsp32_hw_data *data)
  {
  	/* stop condition */
  	nsp32_prom_set(data, SCL, 1);
  	nsp32_prom_set(data, SDA, 0);
  	nsp32_prom_set(data, ENA, 1);	/* output mode */
  	nsp32_prom_set(data, SDA, 1);
  	nsp32_prom_set(data, SCL, 0);
  }
  
  static void nsp32_prom_write_bit(nsp32_hw_data *data, int val)
  {
  	/* write */
  	nsp32_prom_set(data, SDA, val);
  	nsp32_prom_set(data, SCL, 1  );
  	nsp32_prom_set(data, SCL, 0  );
  }
  
  static int nsp32_prom_read_bit(nsp32_hw_data *data)
  {
  	int val;
  
  	/* read */
  	nsp32_prom_set(data, ENA, 0);	/* input mode */
  	nsp32_prom_set(data, SCL, 1);
  
  	val = nsp32_prom_get(data, SDA);
  
  	nsp32_prom_set(data, SCL, 0);
  	nsp32_prom_set(data, ENA, 1);	/* output mode */
  
  	return val;
  }
  
  
  /**************************************************************************
   * Power Management
   */
  #ifdef CONFIG_PM
  
  /* Device suspended */
  static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state)
  {
  	struct Scsi_Host *host = pci_get_drvdata(pdev);
  
  	nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host);
  
  	pci_save_state     (pdev);
  	pci_disable_device (pdev);
  	pci_set_power_state(pdev, pci_choose_state(pdev, state));
  
  	return 0;
  }
  
  /* Device woken up */
  static int nsp32_resume(struct pci_dev *pdev)
  {
  	struct Scsi_Host *host = pci_get_drvdata(pdev);
  	nsp32_hw_data    *data = (nsp32_hw_data *)host->hostdata;
  	unsigned short    reg;
  
  	nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host);
  
  	pci_set_power_state(pdev, PCI_D0);
  	pci_enable_wake    (pdev, PCI_D0, 0);
  	pci_restore_state  (pdev);
  
  	reg = nsp32_read2(data->BaseAddress, INDEX_REG);
  
  	nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg);
  
  	if (reg == 0xffff) {
  		nsp32_msg(KERN_INFO, "missing device. abort resume.");
  		return 0;
  	}
  
  	nsp32hw_init      (data);
  	nsp32_do_bus_reset(data);
  
  	nsp32_msg(KERN_INFO, "resume success");
  
  	return 0;
  }
  
  #endif
  
  /************************************************************************
   * PCI/Cardbus probe/remove routine
   */
  static int __devinit nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  {
  	int ret;
  	nsp32_hw_data *data = &nsp32_data_base;
  
  	nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
  
          ret = pci_enable_device(pdev);
  	if (ret) {
  		nsp32_msg(KERN_ERR, "failed to enable pci device");
  		return ret;
  	}
  
  	data->Pci         = pdev;
  	data->pci_devid   = id;
  	data->IrqNumber   = pdev->irq;
  	data->BaseAddress = pci_resource_start(pdev, 0);
  	data->NumAddress  = pci_resource_len  (pdev, 0);
  	data->MmioAddress = pci_ioremap_bar(pdev, 1);
  	data->MmioLength  = pci_resource_len  (pdev, 1);
  
  	pci_set_master(pdev);
  
  	ret = nsp32_detect(pdev);
  
  	nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s",
  		  pdev->irq,
  		  data->MmioAddress, data->MmioLength,
  		  pci_name(pdev),
  		  nsp32_model[id->driver_data]);
  
  	nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret);
  
  	return ret;
  }
  
  static void __devexit nsp32_remove(struct pci_dev *pdev)
  {
  	struct Scsi_Host *host = pci_get_drvdata(pdev);
  
  	nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
  
          scsi_remove_host(host);
  
  	nsp32_release(host);
  
  	scsi_host_put(host);
  }
  
  static struct pci_driver nsp32_driver = {
  	.name		= "nsp32",
  	.id_table	= nsp32_pci_table,
  	.probe		= nsp32_probe,
  	.remove		= __devexit_p(nsp32_remove),
  #ifdef CONFIG_PM
  	.suspend	= nsp32_suspend, 
  	.resume		= nsp32_resume, 
  #endif
  };
  
  /*********************************************************************
   * Moule entry point
   */
  static int __init init_nsp32(void) {
  	nsp32_msg(KERN_INFO, "loading...");
  	return pci_register_driver(&nsp32_driver);
  }
  
  static void __exit exit_nsp32(void) {
  	nsp32_msg(KERN_INFO, "unloading...");
  	pci_unregister_driver(&nsp32_driver);
  }
  
  module_init(init_nsp32);
  module_exit(exit_nsp32);
  
  /* end */
  