Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3404 insertions, 0 deletions

diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
new file mode 100644
index 0000000000..b798701968
--- /dev/null
+++ b/drivers/scsi/nsp32.c
@@ -0,0 +1,3404 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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>
+ *
+ * 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/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 bool      auto_param = 0;	/* default: ON */
+module_param     (auto_param, bool, 0);
+MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
+
+static bool      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[] = {
+	{
+		.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 nsp32_probe (struct pci_dev *, const struct pci_device_id *);
+static void 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_show_info   (struct seq_file *, struct Scsi_Host *);
+
+static int	   nsp32_detect      (struct pci_dev *pdev);
+static int	   nsp32_queuecommand(struct Scsi_Host *, 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_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 const struct scsi_host_template nsp32_template = {
+	.proc_name			= "nsp32",
+	.name				= "Workbit NinjaSCSI-32Bi/UDE",
+	.show_info			= nsp32_show_info,
+	.info				= nsp32_info,
+	.queuecommand			= nsp32_queuecommand,
+	.can_queue			= 1,
+	.sg_tablesize			= NSP32_SG_SIZE,
+	.max_sectors			= 128,
+	.this_id			= NSP32_HOST_SCSIID,
+	.dma_boundary			= PAGE_SIZE - 1,
+	.eh_abort_handler		= nsp32_eh_abort,
+	.eh_host_reset_handler		= nsp32_eh_host_reset,
+/*	.highmem_io			= 1, */
+	.cmd_size			= sizeof(struct nsp32_cmd_priv),
+};
+
+#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
+
+__printf(4, 5)
+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;
+	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) || (phase & BUSMON_SEL)) {
+		nsp32_msg(KERN_WARNING, "bus busy");
+		SCpnt->result = DID_BUS_BUSY << 16;
+		status = 1;
+		goto out;
+	}
+
+	/*
+	 * clear 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%x", 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_lck(struct scsi_cmnd *SCpnt)
+{
+	void (*done)(struct scsi_cmnd *) = scsi_done;
+	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%llx 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, "target==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);
+
+	data->CurrentSC      = SCpnt;
+	nsp32_priv(SCpnt)->status = SAM_STAT_CHECK_CONDITION;
+	scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
+
+	/* 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;
+}
+
+static DEF_SCSI_QCMD(nsp32_queuecommand)
+
+/* 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 transferred! */
+		}
+
+		/*
+		 * 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");
+
+			nsp32_priv(SCpnt)->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);
+}
+
+
+static int nsp32_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+	unsigned long     flags;
+	nsp32_hw_data    *data;
+	int		  hostno;
+	unsigned int      base;
+	unsigned char     mode_reg;
+	int		  id, speed;
+	long		  model;
+
+	hostno = host->host_no;
+	data = (nsp32_hw_data *)host->hostdata;
+	base = host->io_port;
+
+	seq_puts(m, "NinjaSCSI-32 status\n\n");
+	seq_printf(m, "Driver version:        %s, $Revision: 1.33 $\n",
+		   nsp32_release_version);
+	seq_printf(m, "SCSI host No.:         %d\n", hostno);
+	seq_printf(m, "IRQ:                   %d\n", host->irq);
+	seq_printf(m, "IO:                    0x%lx-0x%lx\n",
+		   host->io_port, host->io_port + host->n_io_port - 1);
+	seq_printf(m, "MMIO(virtual address): 0x%lx-0x%lx\n",
+		   host->base, host->base + data->MmioLength - 1);
+	seq_printf(m, "sg_tablesize:          %d\n",
+		   host->sg_tablesize);
+	seq_printf(m, "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
+	seq_printf(m, "Power Management:      %s\n",
+		   (mode_reg & OPTF) ? "yes" : "no");
+#endif
+	seq_printf(m, "OEM:                   %ld, %s\n",
+		   (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
+
+	spin_lock_irqsave(&(data->Lock), flags);
+	seq_printf(m, "CurrentSC:             0x%p\n\n",      data->CurrentSC);
+	spin_unlock_irqrestore(&(data->Lock), flags);
+
+
+	seq_puts(m, "SDTR status\n");
+	for (id = 0; id < ARRAY_SIZE(data->target); id++) {
+
+		seq_printf(m, "id %d: ", id);
+
+		if (id == host->this_id) {
+			seq_puts(m, "----- 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 ) {
+				seq_puts(m, "async");
+			} else {
+				seq_puts(m, " sync");
+			}
+		} else {
+			seq_puts(m, " none");
+		}
+
+		if (data->target[id].period != 0) {
+
+			speed = 1000000 / (data->target[id].period * 4);
+
+			seq_printf(m, " transfer %d.%dMB/s, offset %d",
+				speed / 1000,
+				speed % 1000,
+				data->target[id].offset
+				);
+		}
+		seq_putc(m, '\n');
+	}
+	return 0;
+}
+
+
+
+/*
+ * 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
+	 */
+	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: Disconnect.
+ * 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 transferring.
+			 */
+			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");
+
+		nsp32_priv(SCpnt)->status  = nsp32_read1(base, SCSI_CSB_IN);
+		nsp32_dbg(NSP32_DEBUG_BUSFREE,
+			  "normal end stat=0x%x resid=0x%x\n",
+			  nsp32_priv(SCpnt)->status, scsi_get_resid(SCpnt));
+		SCpnt->result = (DID_OK << 16) |
+			(nsp32_priv(SCpnt)->status << 0);
+		nsp32_scsi_done(SCpnt);
+		/* All operation is done */
+		return TRUE;
+	} else if (execph & MSGIN_04_VALID) {
+		/* MsgIn 04: Disconnect */
+		nsp32_priv(SCpnt)->status = nsp32_read1(base, SCSI_CSB_IN);
+
+		nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
+		return TRUE;
+	} else {
+		/* Unexpected bus free */
+		nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
+
+		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 transferring */
+	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;
+	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);
+	}
+
+	/*
+	 * 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;
+	unsigned char    get_period = data->msginbuf[3];
+	unsigned char    get_offset = data->msginbuf[4];
+	int		 entry;
+
+	nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
+
+	/*
+	 * 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;
+	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 (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) != 0) {
+		nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
+		goto scsi_unregister;
+	}
+
+	/*
+	 * allocate autoparam DMA resource.
+	 */
+	data->autoparam = dma_alloc_coherent(&pdev->dev,
+			sizeof(nsp32_autoparam), &(data->auto_paddr),
+			GFP_KERNEL);
+	if (data->autoparam == NULL) {
+		nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
+		goto scsi_unregister;
+	}
+
+	/*
+	 * allocate scatter-gather DMA resource.
+	 */
+	data->sg_list = dma_alloc_coherent(&pdev->dev, NSP32_SG_TABLE_SIZE,
+			&data->sg_paddr, GFP_KERNEL);
+	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%x+0x%x 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:
+	dma_free_coherent(&pdev->dev, NSP32_SG_TABLE_SIZE,
+			    data->sg_list, data->sg_paddr);
+
+ free_autoparam:
+	dma_free_coherent(&pdev->dev, 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) {
+		dma_free_coherent(&data->Pci->dev, sizeof(nsp32_autoparam),
+				    data->autoparam, data->auto_paddr);
+	}
+
+	if (data->sg_list) {
+		dma_free_coherent(&data->Pci->dev, 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 void nsp32_do_bus_reset(nsp32_hw_data *data)
+{
+	unsigned int   base = data->BaseAddress;
+	int i;
+	unsigned short __maybe_unused intrdat;
+
+	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);
+	mdelay(RESET_HOLD_TIME / 1000);
+	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, i;
+	int __maybe_unused val;
+
+	/*
+	 * 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.event=%x, slot=%s, host=0x%p",
+		  pdev, state.event, 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 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 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		= 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 */