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nsp_cs.c

/*======================================================================

    NinjaSCSI-3 / NinjaSCSI-32Bi PCMCIA SCSI host adapter card driver
      By: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>

    Ver.2.8   Support 32bit MMIO mode
              Support Synchronous Data Transfer Request (SDTR) mode
    Ver.2.0   Support 32bit PIO mode
    Ver.1.1.2 Fix for scatter list buffer exceeds
    Ver.1.1   Support scatter list
    Ver.0.1   Initial version

    This software may be used and distributed according to the terms of
    the GNU General Public License.

======================================================================*/

/***********************************************************************
    This driver is for these PCcards.

      I-O DATA PCSC-F    (Workbit NinjaSCSI-3)
                  "WBT", "NinjaSCSI-3", "R1.0"
      I-O DATA CBSC-II (Workbit NinjaSCSI-32Bi in 16bit mode)
                  "IO DATA", "CBSC16       ", "1"

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

#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/stat.h>

#include <asm/io.h>
#include <asm/irq.h>

#include <../drivers/scsi/scsi.h>
#include <scsi/scsi_host.h>

#include <scsi/scsi.h>
#include <scsi/scsi_ioctl.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include "nsp_cs.h"

MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>");
MODULE_DESCRIPTION("WorkBit NinjaSCSI-3 / NinjaSCSI-32Bi(16bit) PCMCIA SCSI host adapter module");
MODULE_SUPPORTED_DEVICE("sd,sr,sg,st");
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif

#include "nsp_io.h"

/*====================================================================*/
/* Parameters that can be set with 'insmod' */

static int       nsp_burst_mode = BURST_MEM32;
module_param(nsp_burst_mode, int, 0);
MODULE_PARM_DESC(nsp_burst_mode, "Burst transfer mode (0=io8, 1=io32, 2=mem32(default))");

/* Release IO ports after configuration? */
static int       free_ports = 0;
module_param(free_ports, bool, 0);
MODULE_PARM_DESC(free_ports, "Release IO ports after configuration? (default: 0 (=no))");

static struct scsi_host_template nsp_driver_template = {
      .proc_name           = "nsp_cs",
      .proc_info         = nsp_proc_info,
      .name              = "WorkBit NinjaSCSI-3/32Bi(16bit)",
      .info              = nsp_info,
      .queuecommand            = nsp_queuecommand,
/*    .eh_abort_handler  = nsp_eh_abort,*/
      .eh_bus_reset_handler    = nsp_eh_bus_reset,
      .eh_host_reset_handler   = nsp_eh_host_reset,
      .can_queue         = 1,
      .this_id           = NSP_INITIATOR_ID,
      .sg_tablesize            = SG_ALL,
      .cmd_per_lun             = 1,
      .use_clustering          = DISABLE_CLUSTERING,
};

static nsp_hw_data nsp_data_base; /* attach <-> detect glue */



/*
 * debug, error print
 */
#ifndef NSP_DEBUG
# define NSP_DEBUG_MASK       0x000000
# define nsp_msg(type, args...) nsp_cs_message("", 0, (type), args)
# define nsp_dbg(mask, args...) /* */
#else
# define NSP_DEBUG_MASK       0xffffff
# define nsp_msg(type, args...) \
      nsp_cs_message (__FUNCTION__, __LINE__, (type), args)
# define nsp_dbg(mask, args...) \
      nsp_cs_dmessage(__FUNCTION__, __LINE__, (mask), args)
#endif

#define NSP_DEBUG_QUEUECOMMAND            BIT(0)
#define NSP_DEBUG_REGISTER          BIT(1)
#define NSP_DEBUG_AUTOSCSI          BIT(2)
#define NSP_DEBUG_INTR              BIT(3)
#define NSP_DEBUG_SGLIST            BIT(4)
#define NSP_DEBUG_BUSFREE           BIT(5)
#define NSP_DEBUG_CDB_CONTENTS            BIT(6)
#define NSP_DEBUG_RESELECTION       BIT(7)
#define NSP_DEBUG_MSGINOCCUR        BIT(8)
#define NSP_DEBUG_EEPROM            BIT(9)
#define NSP_DEBUG_MSGOUTOCCUR       BIT(10)
#define NSP_DEBUG_BUSRESET          BIT(11)
#define NSP_DEBUG_RESTART           BIT(12)
#define NSP_DEBUG_SYNC              BIT(13)
#define NSP_DEBUG_WAIT              BIT(14)
#define NSP_DEBUG_TARGETFLAG        BIT(15)
#define NSP_DEBUG_PROC              BIT(16)
#define NSP_DEBUG_INIT              BIT(17)
#define NSP_DEBUG_DATA_IO                 BIT(18)
#define NSP_SPECIAL_PRINT_REGISTER  BIT(20)

#define NSP_DEBUG_BUF_LEN           150

static void nsp_cs_message(const char *func, int line, char *type, char *fmt, ...)
{
      va_list args;
      char buf[NSP_DEBUG_BUF_LEN];

      va_start(args, fmt);
      vsnprintf(buf, sizeof(buf), fmt, args);
      va_end(args);

#ifndef NSP_DEBUG
      printk("%snsp_cs: %s\n", type, buf);
#else
      printk("%snsp_cs: %s (%d): %s\n", type, func, line, buf);
#endif
}

#ifdef NSP_DEBUG
static void nsp_cs_dmessage(const char *func, int line, int mask, char *fmt, ...)
{
      va_list args;
      char buf[NSP_DEBUG_BUF_LEN];

      va_start(args, fmt);
      vsnprintf(buf, sizeof(buf), fmt, args);
      va_end(args);

      if (mask & NSP_DEBUG_MASK) {
            printk("nsp_cs-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
      }
}
#endif

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

/*====================================================
 * Clenaup parameters and call done() functions.
 * You must be set SCpnt->result before call this function.
 */
static void nsp_scsi_done(struct scsi_cmnd *SCpnt)
{
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;

      data->CurrentSC = NULL;

      SCpnt->scsi_done(SCpnt);
}

static int nsp_queuecommand(struct scsi_cmnd *SCpnt,
                      void (*done)(struct scsi_cmnd *))
{
#ifdef NSP_DEBUG
      /*unsigned int host_id = SCpnt->device->host->this_id;*/
      /*unsigned int base    = SCpnt->device->host->io_port;*/
      unsigned char target = scmd_id(SCpnt);
#endif
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;

      nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "SCpnt=0x%p target=%d lun=%d buff=0x%p bufflen=%d use_sg=%d",
               SCpnt, target, SCpnt->device->lun, SCpnt->request_buffer, SCpnt->request_bufflen, SCpnt->use_sg);
      //nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "before CurrentSC=0x%p", data->CurrentSC);

      SCpnt->scsi_done  = done;

      if (data->CurrentSC != NULL) {
            nsp_msg(KERN_DEBUG, "CurrentSC!=NULL this can't be happen");
            SCpnt->result   = DID_BAD_TARGET << 16;
            nsp_scsi_done(SCpnt);
            return 0;
      }

#if 0
      /* XXX: pcmcia-cs generates SCSI command with "scsi_info" utility.
              This makes kernel crash when suspending... */
      if (data->ScsiInfo->stop != 0) {
            nsp_msg(KERN_INFO, "suspending device. reject command.");
            SCpnt->result  = DID_BAD_TARGET << 16;
            nsp_scsi_done(SCpnt);
            return SCSI_MLQUEUE_HOST_BUSY;
      }
#endif

      show_command(SCpnt);

      data->CurrentSC         = SCpnt;

      SCpnt->SCp.Status = CHECK_CONDITION;
      SCpnt->SCp.Message      = 0;
      SCpnt->SCp.have_data_in = IO_UNKNOWN;
      SCpnt->SCp.sent_command = 0;
      SCpnt->SCp.phase  = PH_UNDETERMINED;
      SCpnt->resid              = SCpnt->request_bufflen;

      /* setup scratch area
         SCp.ptr        : buffer pointer
         SCp.this_residual    : buffer length
         SCp.buffer           : next buffer
         SCp.buffers_residual : left buffers in list
         SCp.phase            : current state of the command */
      if (SCpnt->use_sg) {
            SCpnt->SCp.buffer     = (struct scatterlist *) SCpnt->request_buffer;
            SCpnt->SCp.ptr              = BUFFER_ADDR;
            SCpnt->SCp.this_residual    = SCpnt->SCp.buffer->length;
            SCpnt->SCp.buffers_residual = SCpnt->use_sg - 1;
      } else {
            SCpnt->SCp.ptr              = (char *) SCpnt->request_buffer;
            SCpnt->SCp.this_residual    = SCpnt->request_bufflen;
            SCpnt->SCp.buffer     = NULL;
            SCpnt->SCp.buffers_residual = 0;
      }

      if (nsphw_start_selection(SCpnt) == FALSE) {
            nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "selection fail");
            SCpnt->result   = DID_BUS_BUSY << 16;
            nsp_scsi_done(SCpnt);
            return 0;
      }


      //nsp_dbg(NSP_DEBUG_QUEUECOMMAND, "out");
#ifdef NSP_DEBUG
      data->CmdId++;
#endif
      return 0;
}

/*
 * setup PIO FIFO transfer mode and enable/disable to data out
 */
static void nsp_setup_fifo(nsp_hw_data *data, int enabled)
{
      unsigned int  base = data->BaseAddress;
      unsigned char transfer_mode_reg;

      //nsp_dbg(NSP_DEBUG_DATA_IO, "enabled=%d", enabled);

      if (enabled != FALSE) {
            transfer_mode_reg = TRANSFER_GO | BRAIND;
      } else {
            transfer_mode_reg = 0;
      }

      transfer_mode_reg |= data->TransferMode;

      nsp_index_write(base, TRANSFERMODE, transfer_mode_reg);
}

static void nsphw_init_sync(nsp_hw_data *data)
{
      sync_data tmp_sync = { .SyncNegotiation = SYNC_NOT_YET,
                         .SyncPeriod      = 0,
                         .SyncOffset      = 0
      };
      int i;

      /* setup sync data */
      for ( i = 0; i < ARRAY_SIZE(data->Sync); i++ ) {
            data->Sync[i] = tmp_sync;
      }
}

/*
 * Initialize Ninja hardware
 */
static int nsphw_init(nsp_hw_data *data)
{
      unsigned int base     = data->BaseAddress;

      nsp_dbg(NSP_DEBUG_INIT, "in base=0x%x", base);

      data->ScsiClockDiv = CLOCK_40M | FAST_20;
      data->CurrentSC    = NULL;
      data->FifoCount    = 0;
      data->TransferMode = MODE_IO8;

      nsphw_init_sync(data);

      /* block all interrupts */
      nsp_write(base,         IRQCONTROL,   IRQCONTROL_ALLMASK);

      /* setup SCSI interface */
      nsp_write(base,         IFSELECT,       IF_IFSEL);

      nsp_index_write(base, SCSIIRQMODE,  0);

      nsp_index_write(base, TRANSFERMODE, MODE_IO8);
      nsp_index_write(base, CLOCKDIV,         data->ScsiClockDiv);

      nsp_index_write(base, PARITYCTRL,   0);
      nsp_index_write(base, POINTERCLR,   POINTER_CLEAR     |
                                  ACK_COUNTER_CLEAR |
                                  REQ_COUNTER_CLEAR |
                                  HOST_COUNTER_CLEAR);

      /* setup fifo asic */
      nsp_write(base,         IFSELECT,       IF_REGSEL);
      nsp_index_write(base, TERMPWRCTRL,  0);
      if ((nsp_index_read(base, OTHERCONTROL) & TPWR_SENSE) == 0) {
            nsp_msg(KERN_INFO, "terminator power on");
            nsp_index_write(base, TERMPWRCTRL, POWER_ON);
      }

      nsp_index_write(base, TIMERCOUNT,   0);
      nsp_index_write(base, TIMERCOUNT,   0); /* requires 2 times!! */

      nsp_index_write(base, SYNCREG,          0);
      nsp_index_write(base, ACKWIDTH,         0);

      /* enable interrupts and ack them */
      nsp_index_write(base, SCSIIRQMODE,  SCSI_PHASE_CHANGE_EI |
                                  RESELECT_EI          |
                                  SCSI_RESET_IRQ_EI    );
      nsp_write(base,         IRQCONTROL,   IRQCONTROL_ALLCLEAR);

      nsp_setup_fifo(data, FALSE);

      return TRUE;
}

/*
 * Start selection phase
 */
static int nsphw_start_selection(struct scsi_cmnd *SCpnt)
{
      unsigned int  host_id    = SCpnt->device->host->this_id;
      unsigned int  base       = SCpnt->device->host->io_port;
      unsigned char target     = scmd_id(SCpnt);
      nsp_hw_data  *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
      int         time_out;
      unsigned char phase, arbit;

      //nsp_dbg(NSP_DEBUG_RESELECTION, "in");

      phase = nsp_index_read(base, SCSIBUSMON);
      if(phase != BUSMON_BUS_FREE) {
            //nsp_dbg(NSP_DEBUG_RESELECTION, "bus busy");
            return FALSE;
      }

      /* start arbitration */
      //nsp_dbg(NSP_DEBUG_RESELECTION, "start arbit");
      SCpnt->SCp.phase = PH_ARBSTART;
      nsp_index_write(base, SETARBIT, ARBIT_GO);

      time_out = 1000;
      do {
            /* XXX: what a stupid chip! */
            arbit = nsp_index_read(base, ARBITSTATUS);
            //nsp_dbg(NSP_DEBUG_RESELECTION, "arbit=%d, wait_count=%d", arbit, wait_count);
            udelay(1); /* hold 1.2us */
      } while((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
            (time_out-- != 0));

      if (!(arbit & ARBIT_WIN)) {
            //nsp_dbg(NSP_DEBUG_RESELECTION, "arbit fail");
            nsp_index_write(base, SETARBIT, ARBIT_FLAG_CLEAR);
            return FALSE;
      }

      /* assert select line */
      //nsp_dbg(NSP_DEBUG_RESELECTION, "assert SEL line");
      SCpnt->SCp.phase = PH_SELSTART;
      udelay(3); /* wait 2.4us */
      nsp_index_write(base, SCSIDATALATCH, BIT(host_id) | BIT(target));
      nsp_index_write(base, SCSIBUSCTRL,   SCSI_SEL | SCSI_BSY                    | SCSI_ATN);
      udelay(2); /* wait >1.2us */
      nsp_index_write(base, SCSIBUSCTRL,   SCSI_SEL | SCSI_BSY | SCSI_DATAOUT_ENB | SCSI_ATN);
      nsp_index_write(base, SETARBIT,          ARBIT_FLAG_CLEAR);
      /*udelay(1);*/ /* wait >90ns */
      nsp_index_write(base, SCSIBUSCTRL,   SCSI_SEL            | SCSI_DATAOUT_ENB | SCSI_ATN);

      /* check selection timeout */
      nsp_start_timer(SCpnt, 1000/51);
      data->SelectionTimeOut = 1;

      return TRUE;
}

struct nsp_sync_table {
      unsigned int min_period;
      unsigned int max_period;
      unsigned int chip_period;
      unsigned int ack_width;
};

static struct nsp_sync_table nsp_sync_table_40M[] = {
      {0x0c, 0x0c, 0x1, 0},   /* 20MB       50ns*/
      {0x19, 0x19, 0x3, 1},   /* 10MB      100ns*/ 
      {0x1a, 0x25, 0x5, 2},   /* 7.5MB 150ns*/ 
      {0x26, 0x32, 0x7, 3},   /* 5MB       200ns*/
      {   0,    0,   0, 0},
};

static struct nsp_sync_table nsp_sync_table_20M[] = {
      {0x19, 0x19, 0x1, 0},   /* 10MB      100ns*/ 
      {0x1a, 0x25, 0x2, 0},   /* 7.5MB 150ns*/ 
      {0x26, 0x32, 0x3, 1},   /* 5MB       200ns*/
      {   0,    0,   0, 0},
};

/*
 * setup synchronous data transfer mode
 */
static int nsp_analyze_sdtr(struct scsi_cmnd *SCpnt)
{
      unsigned char            target = scmd_id(SCpnt);
//    unsigned char            lun    = SCpnt->device->lun;
      nsp_hw_data           *data   = (nsp_hw_data *)SCpnt->device->host->hostdata;
      sync_data         *sync   = &(data->Sync[target]);
      struct nsp_sync_table *sync_table;
      unsigned int             period, offset;
      int                i;


      nsp_dbg(NSP_DEBUG_SYNC, "in");

      period = sync->SyncPeriod;
      offset = sync->SyncOffset;

      nsp_dbg(NSP_DEBUG_SYNC, "period=0x%x, offset=0x%x", period, offset);

      if ((data->ScsiClockDiv & (BIT(0)|BIT(1))) == CLOCK_20M) {
            sync_table = nsp_sync_table_20M;
      } else {
            sync_table = nsp_sync_table_40M;
      }

      for ( i = 0; sync_table->max_period != 0; i++, sync_table++) {
            if ( period >= sync_table->min_period &&
                 period <= sync_table->max_period      ) {
                  break;
            }
      }

      if (period != 0 && sync_table->max_period == 0) {
            /*
             * No proper period/offset found
             */
            nsp_dbg(NSP_DEBUG_SYNC, "no proper period/offset");

            sync->SyncPeriod      = 0;
            sync->SyncOffset      = 0;
            sync->SyncRegister    = 0;
            sync->AckWidth          = 0;

            return FALSE;
      }

      sync->SyncRegister    = (sync_table->chip_period << SYNCREG_PERIOD_SHIFT) |
                            (offset & SYNCREG_OFFSET_MASK);
      sync->AckWidth          = sync_table->ack_width;

      nsp_dbg(NSP_DEBUG_SYNC, "sync_reg=0x%x, ack_width=0x%x", sync->SyncRegister, sync->AckWidth);

      return TRUE;
}


/*
 * start ninja hardware timer
 */
static void nsp_start_timer(struct scsi_cmnd *SCpnt, int time)
{
      unsigned int base = SCpnt->device->host->io_port;
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;

      //nsp_dbg(NSP_DEBUG_INTR, "in SCpnt=0x%p, time=%d", SCpnt, time);
      data->TimerCount = time;
      nsp_index_write(base, TIMERCOUNT, time);
}

/*
 * wait for bus phase change
 */
static int nsp_negate_signal(struct scsi_cmnd *SCpnt, unsigned char mask,
                       char *str)
{
      unsigned int  base = SCpnt->device->host->io_port;
      unsigned char reg;
      int         time_out;

      //nsp_dbg(NSP_DEBUG_INTR, "in");

      time_out = 100;

      do {
            reg = nsp_index_read(base, SCSIBUSMON);
            if (reg == 0xff) {
                  break;
            }
      } while ((time_out-- != 0) && (reg & mask) != 0);

      if (time_out == 0) {
            nsp_msg(KERN_DEBUG, " %s signal off timeut", str);
      }

      return 0;
}

/*
 * expect Ninja Irq
 */
static int nsp_expect_signal(struct scsi_cmnd *SCpnt,
                       unsigned char current_phase,
                       unsigned char mask)
{
      unsigned int  base       = SCpnt->device->host->io_port;
      int         time_out;
      unsigned char phase, i_src;

      //nsp_dbg(NSP_DEBUG_INTR, "current_phase=0x%x, mask=0x%x", current_phase, mask);

      time_out = 100;
      do {
            phase = nsp_index_read(base, SCSIBUSMON);
            if (phase == 0xff) {
                  //nsp_dbg(NSP_DEBUG_INTR, "ret -1");
                  return -1;
            }
            i_src = nsp_read(base, IRQSTATUS);
            if (i_src & IRQSTATUS_SCSI) {
                  //nsp_dbg(NSP_DEBUG_INTR, "ret 0 found scsi signal");
                  return 0;
            }
            if ((phase & mask) != 0 && (phase & BUSMON_PHASE_MASK) == current_phase) {
                  //nsp_dbg(NSP_DEBUG_INTR, "ret 1 phase=0x%x", phase);
                  return 1;
            }
      } while(time_out-- != 0);

      //nsp_dbg(NSP_DEBUG_INTR, "timeout");
      return -1;
}

/*
 * transfer SCSI message
 */
static int nsp_xfer(struct scsi_cmnd *SCpnt, int phase)
{
      unsigned int  base = SCpnt->device->host->io_port;
      nsp_hw_data  *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
      char       *buf  = data->MsgBuffer;
      int         len  = min(MSGBUF_SIZE, data->MsgLen);
      int         ptr;
      int         ret;

      //nsp_dbg(NSP_DEBUG_DATA_IO, "in");
      for (ptr = 0; len > 0; len--, ptr++) {

            ret = nsp_expect_signal(SCpnt, phase, BUSMON_REQ);
            if (ret <= 0) {
                  nsp_dbg(NSP_DEBUG_DATA_IO, "xfer quit");
                  return 0;
            }

            /* if last byte, negate ATN */
            if (len == 1 && SCpnt->SCp.phase == PH_MSG_OUT) {
                  nsp_index_write(base, SCSIBUSCTRL, AUTODIRECTION | ACKENB);
            }

            /* read & write message */
            if (phase & BUSMON_IO) {
                  nsp_dbg(NSP_DEBUG_DATA_IO, "read msg");
                  buf[ptr] = nsp_index_read(base, SCSIDATAWITHACK);
            } else {
                  nsp_dbg(NSP_DEBUG_DATA_IO, "write msg");
                  nsp_index_write(base, SCSIDATAWITHACK, buf[ptr]);
            }
            nsp_negate_signal(SCpnt, BUSMON_ACK, "xfer<ack>");

      }
      return len;
}

/*
 * get extra SCSI data from fifo
 */
static int nsp_dataphase_bypass(struct scsi_cmnd *SCpnt)
{
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
      unsigned int count;

      //nsp_dbg(NSP_DEBUG_DATA_IO, "in");

      if (SCpnt->SCp.have_data_in != IO_IN) {
            return 0;
      }

      count = nsp_fifo_count(SCpnt);
      if (data->FifoCount == count) {
            //nsp_dbg(NSP_DEBUG_DATA_IO, "not use bypass quirk");
            return 0;
      }

      /*
       * XXX: NSP_QUIRK
       * data phase skip only occures in case of SCSI_LOW_READ
       */
      nsp_dbg(NSP_DEBUG_DATA_IO, "use bypass quirk");
      SCpnt->SCp.phase = PH_DATA;
      nsp_pio_read(SCpnt);
      nsp_setup_fifo(data, FALSE);

      return 0;
}

/*
 * accept reselection
 */
static int nsp_reselected(struct scsi_cmnd *SCpnt)
{
      unsigned int  base    = SCpnt->device->host->io_port;
      unsigned int  host_id = SCpnt->device->host->this_id;
      //nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
      unsigned char bus_reg;
      unsigned char id_reg, tmp;
      int target;

      nsp_dbg(NSP_DEBUG_RESELECTION, "in");

      id_reg = nsp_index_read(base, RESELECTID);
      tmp    = id_reg & (~BIT(host_id));
      target = 0;
      while(tmp != 0) {
            if (tmp & BIT(0)) {
                  break;
            }
            tmp >>= 1;
            target++;
      }

      if (scmd_id(SCpnt) != target) {
            nsp_msg(KERN_ERR, "XXX: reselect ID must be %d in this implementation.", target);
      }

      nsp_negate_signal(SCpnt, BUSMON_SEL, "reselect<SEL>");

      nsp_nexus(SCpnt);
      bus_reg = nsp_index_read(base, SCSIBUSCTRL) & ~(SCSI_BSY | SCSI_ATN);
      nsp_index_write(base, SCSIBUSCTRL, bus_reg);
      nsp_index_write(base, SCSIBUSCTRL, bus_reg | AUTODIRECTION | ACKENB);

      return TRUE;
}

/*
 * count how many data transferd
 */
static int nsp_fifo_count(struct scsi_cmnd *SCpnt)
{
      unsigned int base = SCpnt->device->host->io_port;
      unsigned int count;
      unsigned int l, m, h, dummy;

      nsp_index_write(base, POINTERCLR, POINTER_CLEAR | ACK_COUNTER);

      l     = nsp_index_read(base, TRANSFERCOUNT);
      m     = nsp_index_read(base, TRANSFERCOUNT);
      h     = nsp_index_read(base, TRANSFERCOUNT);
      dummy = nsp_index_read(base, TRANSFERCOUNT); /* required this! */

      count = (h << 16) | (m << 8) | (l << 0);

      //nsp_dbg(NSP_DEBUG_DATA_IO, "count=0x%x", count);

      return count;
}

/* fifo size */
#define RFIFO_CRIT 64
#define WFIFO_CRIT 64

/*
 * read data in DATA IN phase
 */
static void nsp_pio_read(struct scsi_cmnd *SCpnt)
{
      unsigned int  base      = SCpnt->device->host->io_port;
      unsigned long mmio_base = SCpnt->device->host->base;
      nsp_hw_data  *data      = (nsp_hw_data *)SCpnt->device->host->hostdata;
      long        time_out;
      int         ocount, res;
      unsigned char stat, fifo_stat;

      ocount = data->FifoCount;

      nsp_dbg(NSP_DEBUG_DATA_IO, "in SCpnt=0x%p resid=%d ocount=%d ptr=0x%p this_residual=%d buffers=0x%p nbuf=%d",
            SCpnt, SCpnt->resid, ocount, SCpnt->SCp.ptr, SCpnt->SCp.this_residual, SCpnt->SCp.buffer, SCpnt->SCp.buffers_residual);

      time_out = 1000;

      while ((time_out-- != 0) &&
             (SCpnt->SCp.this_residual > 0 || SCpnt->SCp.buffers_residual > 0 ) ) {

            stat = nsp_index_read(base, SCSIBUSMON);
            stat &= BUSMON_PHASE_MASK;


            res = nsp_fifo_count(SCpnt) - ocount;
            //nsp_dbg(NSP_DEBUG_DATA_IO, "ptr=0x%p this=0x%x ocount=0x%x res=0x%x", SCpnt->SCp.ptr, SCpnt->SCp.this_residual, ocount, res);
            if (res == 0) { /* if some data avilable ? */
                  if (stat == BUSPHASE_DATA_IN) { /* phase changed? */
                        //nsp_dbg(NSP_DEBUG_DATA_IO, " wait for data this=%d", SCpnt->SCp.this_residual);
                        continue;
                  } else {
                        nsp_dbg(NSP_DEBUG_DATA_IO, "phase changed stat=0x%x", stat);
                        break;
                  }
            }

            fifo_stat = nsp_read(base, FIFOSTATUS);
            if ((fifo_stat & FIFOSTATUS_FULL_EMPTY) == 0 &&
                stat                                == BUSPHASE_DATA_IN) {
                  continue;
            }

            res = min(res, SCpnt->SCp.this_residual);

            switch (data->TransferMode) {
            case MODE_IO32:
                  res &= ~(BIT(1)|BIT(0)); /* align 4 */
                  nsp_fifo32_read(base, SCpnt->SCp.ptr, res >> 2);
                  break;
            case MODE_IO8:
                  nsp_fifo8_read (base, SCpnt->SCp.ptr, res     );
                  break;

            case MODE_MEM32:
                  res &= ~(BIT(1)|BIT(0)); /* align 4 */
                  nsp_mmio_fifo32_read(mmio_base, SCpnt->SCp.ptr, res >> 2);
                  break;

            default:
                  nsp_dbg(NSP_DEBUG_DATA_IO, "unknown read mode");
                  return;
            }

            SCpnt->resid                   -= res;
            SCpnt->SCp.ptr           += res;
            SCpnt->SCp.this_residual -= res;
            ocount                   += res;
            //nsp_dbg(NSP_DEBUG_DATA_IO, "ptr=0x%p this_residual=0x%x ocount=0x%x", SCpnt->SCp.ptr, SCpnt->SCp.this_residual, ocount);

            /* go to next scatter list if available */
            if (SCpnt->SCp.this_residual  == 0 &&
                SCpnt->SCp.buffers_residual != 0 ) {
                  //nsp_dbg(NSP_DEBUG_DATA_IO, "scatterlist next timeout=%d", time_out);
                  SCpnt->SCp.buffers_residual--;
                  SCpnt->SCp.buffer++;
                  SCpnt->SCp.ptr           = BUFFER_ADDR;
                  SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
                  time_out = 1000;

                  //nsp_dbg(NSP_DEBUG_DATA_IO, "page: 0x%p, off: 0x%x", SCpnt->SCp.buffer->page, SCpnt->SCp.buffer->offset);
            }
      }

      data->FifoCount = ocount;

      if (time_out == 0) {
            nsp_msg(KERN_DEBUG, "pio read timeout resid=%d this_residual=%d buffers_residual=%d",
                  SCpnt->resid, SCpnt->SCp.this_residual, SCpnt->SCp.buffers_residual);
      }
      nsp_dbg(NSP_DEBUG_DATA_IO, "read ocount=0x%x", ocount);
      nsp_dbg(NSP_DEBUG_DATA_IO, "r cmd=%d resid=0x%x\n", data->CmdId, SCpnt->resid);
}

/*
 * write data in DATA OUT phase
 */
static void nsp_pio_write(struct scsi_cmnd *SCpnt)
{
      unsigned int  base      = SCpnt->device->host->io_port;
      unsigned long mmio_base = SCpnt->device->host->base;
      nsp_hw_data  *data      = (nsp_hw_data *)SCpnt->device->host->hostdata;
      int         time_out;
      int           ocount, res;
      unsigned char stat;

      ocount       = data->FifoCount;

      nsp_dbg(NSP_DEBUG_DATA_IO, "in fifocount=%d ptr=0x%p this_residual=%d buffers=0x%p nbuf=%d resid=0x%x",
            data->FifoCount, SCpnt->SCp.ptr, SCpnt->SCp.this_residual, SCpnt->SCp.buffer, SCpnt->SCp.buffers_residual, SCpnt->resid);

      time_out = 1000;

      while ((time_out-- != 0) &&
             (SCpnt->SCp.this_residual > 0 || SCpnt->SCp.buffers_residual > 0)) {
            stat = nsp_index_read(base, SCSIBUSMON);
            stat &= BUSMON_PHASE_MASK;

            if (stat != BUSPHASE_DATA_OUT) {
                  res = ocount - nsp_fifo_count(SCpnt);

                  nsp_dbg(NSP_DEBUG_DATA_IO, "phase changed stat=0x%x, res=%d\n", stat, res);
                  /* Put back pointer */
                  SCpnt->resid                   += res;
                  SCpnt->SCp.ptr           -= res;
                  SCpnt->SCp.this_residual += res;
                  ocount                   -= res;

                  break;
            }

            res = ocount - nsp_fifo_count(SCpnt);
            if (res > 0) { /* write all data? */
                  nsp_dbg(NSP_DEBUG_DATA_IO, "wait for all data out. ocount=0x%x res=%d", ocount, res);
                  continue;
            }

            res = min(SCpnt->SCp.this_residual, WFIFO_CRIT);

            //nsp_dbg(NSP_DEBUG_DATA_IO, "ptr=0x%p this=0x%x res=0x%x", SCpnt->SCp.ptr, SCpnt->SCp.this_residual, res);
            switch (data->TransferMode) {
            case MODE_IO32:
                  res &= ~(BIT(1)|BIT(0)); /* align 4 */
                  nsp_fifo32_write(base, SCpnt->SCp.ptr, res >> 2);
                  break;
            case MODE_IO8:
                  nsp_fifo8_write (base, SCpnt->SCp.ptr, res     );
                  break;

            case MODE_MEM32:
                  res &= ~(BIT(1)|BIT(0)); /* align 4 */
                  nsp_mmio_fifo32_write(mmio_base, SCpnt->SCp.ptr, res >> 2);
                  break;

            default:
                  nsp_dbg(NSP_DEBUG_DATA_IO, "unknown write mode");
                  break;
            }

            SCpnt->resid                   -= res;
            SCpnt->SCp.ptr           += res;
            SCpnt->SCp.this_residual -= res;
            ocount                   += res;

            /* go to next scatter list if available */
            if (SCpnt->SCp.this_residual  == 0 &&
                SCpnt->SCp.buffers_residual != 0 ) {
                  //nsp_dbg(NSP_DEBUG_DATA_IO, "scatterlist next");
                  SCpnt->SCp.buffers_residual--;
                  SCpnt->SCp.buffer++;
                  SCpnt->SCp.ptr           = BUFFER_ADDR;
                  SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
                  time_out = 1000;
            }
      }

      data->FifoCount = ocount;

      if (time_out == 0) {
            nsp_msg(KERN_DEBUG, "pio write timeout resid=0x%x", SCpnt->resid);
      }
      nsp_dbg(NSP_DEBUG_DATA_IO, "write ocount=0x%x", ocount);
      nsp_dbg(NSP_DEBUG_DATA_IO, "w cmd=%d resid=0x%x\n", data->CmdId, SCpnt->resid);
}
#undef RFIFO_CRIT
#undef WFIFO_CRIT

/*
 * setup synchronous/asynchronous data transfer mode
 */
static int nsp_nexus(struct scsi_cmnd *SCpnt)
{
      unsigned int   base   = SCpnt->device->host->io_port;
      unsigned char  target = scmd_id(SCpnt);
//    unsigned char  lun    = SCpnt->device->lun;
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;
      sync_data     *sync   = &(data->Sync[target]);

      //nsp_dbg(NSP_DEBUG_DATA_IO, "in SCpnt=0x%p", SCpnt);

      /* setup synch transfer registers */
      nsp_index_write(base, SYNCREG,      sync->SyncRegister);
      nsp_index_write(base, ACKWIDTH, sync->AckWidth);

      if (SCpnt->use_sg    == 0        ||
          SCpnt->resid % 4 != 0        ||
          SCpnt->resid     <= PAGE_SIZE ) {
            data->TransferMode = MODE_IO8;
      } else if (nsp_burst_mode == BURST_MEM32) {
            data->TransferMode = MODE_MEM32;
      } else if (nsp_burst_mode == BURST_IO32) {
            data->TransferMode = MODE_IO32;
      } else {
            data->TransferMode = MODE_IO8;
      }

      /* setup pdma fifo */
      nsp_setup_fifo(data, TRUE);

      /* clear ack counter */
      data->FifoCount = 0;
      nsp_index_write(base, POINTERCLR, POINTER_CLEAR     |
                                ACK_COUNTER_CLEAR |
                                REQ_COUNTER_CLEAR |
                                HOST_COUNTER_CLEAR);

      return 0;
}

#include "nsp_message.c"
/*
 * interrupt handler
 */
static irqreturn_t nspintr(int irq, void *dev_id)
{
      unsigned int   base;
      unsigned char  irq_status, irq_phase, phase;
      struct scsi_cmnd *tmpSC;
      unsigned char  target, lun;
      unsigned int  *sync_neg;
      int            i, tmp;
      nsp_hw_data   *data;


      //nsp_dbg(NSP_DEBUG_INTR, "dev_id=0x%p", dev_id);
      //nsp_dbg(NSP_DEBUG_INTR, "host=0x%p", ((scsi_info_t *)dev_id)->host);

      if (                dev_id        != NULL &&
          ((scsi_info_t *)dev_id)->host != NULL  ) {
            scsi_info_t *info = (scsi_info_t *)dev_id;

            data = (nsp_hw_data *)info->host->hostdata;
      } else {
            nsp_dbg(NSP_DEBUG_INTR, "host data wrong");
            return IRQ_NONE;
      }

      //nsp_dbg(NSP_DEBUG_INTR, "&nsp_data_base=0x%p, dev_id=0x%p", &nsp_data_base, dev_id);

      base = data->BaseAddress;
      //nsp_dbg(NSP_DEBUG_INTR, "base=0x%x", base);

      /*
       * interrupt check
       */
      nsp_write(base, IRQCONTROL, IRQCONTROL_IRQDISABLE);
      irq_status = nsp_read(base, IRQSTATUS);
      //nsp_dbg(NSP_DEBUG_INTR, "irq_status=0x%x", irq_status);
      if ((irq_status == 0xff) || ((irq_status & IRQSTATUS_MASK) == 0)) {
            nsp_write(base, IRQCONTROL, 0);
            //nsp_dbg(NSP_DEBUG_INTR, "no irq/shared irq");
            return IRQ_NONE;
      }

      /* XXX: IMPORTANT
       * Do not read an irq_phase register if no scsi phase interrupt.
       * Unless, you should lose a scsi phase interrupt.
       */
      phase = nsp_index_read(base, SCSIBUSMON);
      if((irq_status & IRQSTATUS_SCSI) != 0) {
            irq_phase = nsp_index_read(base, IRQPHASESENCE);
      } else {
            irq_phase = 0;
      }

      //nsp_dbg(NSP_DEBUG_INTR, "irq_phase=0x%x", irq_phase);

      /*
       * timer interrupt handler (scsi vs timer interrupts)
       */
      //nsp_dbg(NSP_DEBUG_INTR, "timercount=%d", data->TimerCount);
      if (data->TimerCount != 0) {
            //nsp_dbg(NSP_DEBUG_INTR, "stop timer");
            nsp_index_write(base, TIMERCOUNT, 0);
            nsp_index_write(base, TIMERCOUNT, 0);
            data->TimerCount = 0;
      }

      if ((irq_status & IRQSTATUS_MASK) == IRQSTATUS_TIMER &&
          data->SelectionTimeOut == 0) {
            //nsp_dbg(NSP_DEBUG_INTR, "timer start");
            nsp_write(base, IRQCONTROL, IRQCONTROL_TIMER_CLEAR);
            return IRQ_HANDLED;
      }

      nsp_write(base, IRQCONTROL, IRQCONTROL_TIMER_CLEAR | IRQCONTROL_FIFO_CLEAR);

      if ((irq_status & IRQSTATUS_SCSI) &&
          (irq_phase  & SCSI_RESET_IRQ)) {
            nsp_msg(KERN_ERR, "bus reset (power off?)");

            nsphw_init(data);
            nsp_bus_reset(data);

            if(data->CurrentSC != NULL) {
                  tmpSC = data->CurrentSC;
                  tmpSC->result  = (DID_RESET                   << 16) |
                                 ((tmpSC->SCp.Message & 0xff) <<  8) |
                                 ((tmpSC->SCp.Status  & 0xff) <<  0);
                  nsp_scsi_done(tmpSC);
            }
            return IRQ_HANDLED;
      }

      if (data->CurrentSC == NULL) {
            nsp_msg(KERN_ERR, "CurrentSC==NULL irq_status=0x%x phase=0x%x irq_phase=0x%x this can't be happen. reset everything", irq_status, phase, irq_phase);
            nsphw_init(data);
            nsp_bus_reset(data);
            return IRQ_HANDLED;
      }

      tmpSC    = data->CurrentSC;
      target   = tmpSC->device->id;
      lun      = tmpSC->device->lun;
      sync_neg = &(data->Sync[target].SyncNegotiation);

      /*
       * parse hardware SCSI irq reasons register
       */
      if (irq_status & IRQSTATUS_SCSI) {
            if (irq_phase & RESELECT_IRQ) {
                  nsp_dbg(NSP_DEBUG_INTR, "reselect");
                  nsp_write(base, IRQCONTROL, IRQCONTROL_RESELECT_CLEAR);
                  if (nsp_reselected(tmpSC) != FALSE) {
                        return IRQ_HANDLED;
                  }
            }

            if ((irq_phase & (PHASE_CHANGE_IRQ | LATCHED_BUS_FREE)) == 0) {
                  return IRQ_HANDLED;
            }
      }

      //show_phase(tmpSC);

      switch(tmpSC->SCp.phase) {
      case PH_SELSTART:
            // *sync_neg = SYNC_NOT_YET;
            if ((phase & BUSMON_BSY) == 0) {
                  //nsp_dbg(NSP_DEBUG_INTR, "selection count=%d", data->SelectionTimeOut);
                  if (data->SelectionTimeOut >= NSP_SELTIMEOUT) {
                        nsp_dbg(NSP_DEBUG_INTR, "selection time out");
                        data->SelectionTimeOut = 0;
                        nsp_index_write(base, SCSIBUSCTRL, 0);

                        tmpSC->result   = DID_TIME_OUT << 16;
                        nsp_scsi_done(tmpSC);

                        return IRQ_HANDLED;
                  }
                  data->SelectionTimeOut += 1;
                  nsp_start_timer(tmpSC, 1000/51);
                  return IRQ_HANDLED;
            }

            /* attention assert */
            //nsp_dbg(NSP_DEBUG_INTR, "attention assert");
            data->SelectionTimeOut = 0;
            tmpSC->SCp.phase       = PH_SELECTED;
            nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN);
            udelay(1);
            nsp_index_write(base, SCSIBUSCTRL, SCSI_ATN | AUTODIRECTION | ACKENB);
            return IRQ_HANDLED;

            break;

      case PH_RESELECT:
            //nsp_dbg(NSP_DEBUG_INTR, "phase reselect");
            // *sync_neg = SYNC_NOT_YET;
            if ((phase & BUSMON_PHASE_MASK) != BUSPHASE_MESSAGE_IN) {

                  tmpSC->result     = DID_ABORT << 16;
                  nsp_scsi_done(tmpSC);
                  return IRQ_HANDLED;
            }
            /* fall thru */
      default:
            if ((irq_status & (IRQSTATUS_SCSI | IRQSTATUS_FIFO)) == 0) {
                  return IRQ_HANDLED;
            }
            break;
      }

      /*
       * SCSI sequencer
       */
      //nsp_dbg(NSP_DEBUG_INTR, "start scsi seq");

      /* normal disconnect */
      if (((tmpSC->SCp.phase == PH_MSG_IN) || (tmpSC->SCp.phase == PH_MSG_OUT)) &&
          (irq_phase & LATCHED_BUS_FREE) != 0 ) {
            nsp_dbg(NSP_DEBUG_INTR, "normal disconnect irq_status=0x%x, phase=0x%x, irq_phase=0x%x", irq_status, phase, irq_phase);

            //*sync_neg       = SYNC_NOT_YET;

            if ((tmpSC->SCp.Message == MSG_COMMAND_COMPLETE)) {     /* all command complete and return status */
                  tmpSC->result = (DID_OK                    << 16) |
                              ((tmpSC->SCp.Message & 0xff) <<  8) |
                              ((tmpSC->SCp.Status  & 0xff) <<  0);
                  nsp_dbg(NSP_DEBUG_INTR, "command complete result=0x%x", tmpSC->result);
                  nsp_scsi_done(tmpSC);

                  return IRQ_HANDLED;
            }

            return IRQ_HANDLED;
      }


      /* check unexpected bus free state */
      if (phase == 0) {
            nsp_msg(KERN_DEBUG, "unexpected bus free. irq_status=0x%x, phase=0x%x, irq_phase=0x%x", irq_status, phase, irq_phase);

            *sync_neg       = SYNC_NG;
            tmpSC->result   = DID_ERROR << 16;
            nsp_scsi_done(tmpSC);
            return IRQ_HANDLED;
      }

      switch (phase & BUSMON_PHASE_MASK) {
      case BUSPHASE_COMMAND:
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_COMMAND");
            if ((phase & BUSMON_REQ) == 0) {
                  nsp_dbg(NSP_DEBUG_INTR, "REQ == 0");
                  return IRQ_HANDLED;
            }

            tmpSC->SCp.phase = PH_COMMAND;

            nsp_nexus(tmpSC);

            /* write scsi command */
            nsp_dbg(NSP_DEBUG_INTR, "cmd_len=%d", tmpSC->cmd_len);
            nsp_index_write(base, COMMANDCTRL, CLEAR_COMMAND_POINTER);
            for (i = 0; i < tmpSC->cmd_len; i++) {
                  nsp_index_write(base, COMMANDDATA, tmpSC->cmnd[i]);
            }
            nsp_index_write(base, COMMANDCTRL, CLEAR_COMMAND_POINTER | AUTO_COMMAND_GO);
            break;

      case BUSPHASE_DATA_OUT:
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_DATA_OUT");

            tmpSC->SCp.phase        = PH_DATA;
            tmpSC->SCp.have_data_in = IO_OUT;

            nsp_pio_write(tmpSC);

            break;

      case BUSPHASE_DATA_IN:
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_DATA_IN");

            tmpSC->SCp.phase        = PH_DATA;
            tmpSC->SCp.have_data_in = IO_IN;

            nsp_pio_read(tmpSC);

            break;

      case BUSPHASE_STATUS:
            nsp_dataphase_bypass(tmpSC);
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_STATUS");

            tmpSC->SCp.phase = PH_STATUS;

            tmpSC->SCp.Status = nsp_index_read(base, SCSIDATAWITHACK);
            nsp_dbg(NSP_DEBUG_INTR, "message=0x%x status=0x%x", tmpSC->SCp.Message, tmpSC->SCp.Status);

            break;

      case BUSPHASE_MESSAGE_OUT:
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_MESSAGE_OUT");
            if ((phase & BUSMON_REQ) == 0) {
                  goto timer_out;
            }

            tmpSC->SCp.phase = PH_MSG_OUT;

            //*sync_neg = SYNC_NOT_YET;

            data->MsgLen = i = 0;
            data->MsgBuffer[i] = IDENTIFY(TRUE, lun); i++;

            if (*sync_neg == SYNC_NOT_YET) {
                  data->Sync[target].SyncPeriod = 0;
                  data->Sync[target].SyncOffset = 0;

                  /**/
                  data->MsgBuffer[i] = MSG_EXTENDED; i++;
                  data->MsgBuffer[i] = 3;            i++;
                  data->MsgBuffer[i] = MSG_EXT_SDTR; i++;
                  data->MsgBuffer[i] = 0x0c;         i++;
                  data->MsgBuffer[i] = 15;           i++;
                  /**/
            }
            data->MsgLen = i;

            nsp_analyze_sdtr(tmpSC);
            show_message(data);
            nsp_message_out(tmpSC);
            break;

      case BUSPHASE_MESSAGE_IN:
            nsp_dataphase_bypass(tmpSC);
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE_MESSAGE_IN");
            if ((phase & BUSMON_REQ) == 0) {
                  goto timer_out;
            }

            tmpSC->SCp.phase = PH_MSG_IN;
            nsp_message_in(tmpSC);

            /**/
            if (*sync_neg == SYNC_NOT_YET) {
                  //nsp_dbg(NSP_DEBUG_INTR, "sync target=%d,lun=%d",target,lun);

                  if (data->MsgLen       >= 5            &&
                      data->MsgBuffer[0] == MSG_EXTENDED &&
                      data->MsgBuffer[1] == 3            &&
                      data->MsgBuffer[2] == MSG_EXT_SDTR ) {
                        data->Sync[target].SyncPeriod = data->MsgBuffer[3];
                        data->Sync[target].SyncOffset = data->MsgBuffer[4];
                        //nsp_dbg(NSP_DEBUG_INTR, "sync ok, %d %d", data->MsgBuffer[3], data->MsgBuffer[4]);
                        *sync_neg = SYNC_OK;
                  } else {
                        data->Sync[target].SyncPeriod = 0;
                        data->Sync[target].SyncOffset = 0;
                        *sync_neg = SYNC_NG;
                  }
                  nsp_analyze_sdtr(tmpSC);
            }
            /**/

            /* search last messeage byte */
            tmp = -1;
            for (i = 0; i < data->MsgLen; i++) {
                  tmp = data->MsgBuffer[i];
                  if (data->MsgBuffer[i] == MSG_EXTENDED) {
                        i += (1 + data->MsgBuffer[i+1]);
                  }
            }
            tmpSC->SCp.Message = tmp;

            nsp_dbg(NSP_DEBUG_INTR, "message=0x%x len=%d", tmpSC->SCp.Message, data->MsgLen);
            show_message(data);

            break;

      case BUSPHASE_SELECT:
      default:
            nsp_dbg(NSP_DEBUG_INTR, "BUSPHASE other");

            break;
      }

      //nsp_dbg(NSP_DEBUG_INTR, "out");
      return IRQ_HANDLED;     

timer_out:
      nsp_start_timer(tmpSC, 1000/102);
      return IRQ_HANDLED;
}

#ifdef NSP_DEBUG
#include "nsp_debug.c"
#endif      /* NSP_DEBUG */

/*----------------------------------------------------------------*/
/* look for ninja3 card and init if found               */
/*----------------------------------------------------------------*/
static struct Scsi_Host *nsp_detect(struct scsi_host_template *sht)
{
      struct Scsi_Host *host; /* registered host structure */
      nsp_hw_data *data_b = &nsp_data_base, *data;

      nsp_dbg(NSP_DEBUG_INIT, "this_id=%d", sht->this_id);
      host = scsi_host_alloc(&nsp_driver_template, sizeof(nsp_hw_data));
      if (host == NULL) {
            nsp_dbg(NSP_DEBUG_INIT, "host failed");
            return NULL;
      }

      memcpy(host->hostdata, data_b, sizeof(nsp_hw_data));
      data = (nsp_hw_data *)host->hostdata;
      data->ScsiInfo->host = host;
#ifdef NSP_DEBUG
      data->CmdId = 0;
#endif

      nsp_dbg(NSP_DEBUG_INIT, "irq=%d,%d", data_b->IrqNumber, ((nsp_hw_data *)host->hostdata)->IrqNumber);

      host->unique_id     = data->BaseAddress;
      host->io_port       = data->BaseAddress;
      host->n_io_port     = data->NumAddress;
      host->irq     = data->IrqNumber;
      host->base        = data->MmioAddress;

      spin_lock_init(&(data->Lock));

      snprintf(data->nspinfo,
             sizeof(data->nspinfo),
             "NinjaSCSI-3/32Bi Driver $Revision: 1.23 $ IO:0x%04lx-0x%04lx MMIO(virt addr):0x%04lx IRQ:%02d",
             host->io_port, host->io_port + host->n_io_port - 1,
             host->base,
             host->irq);
      sht->name     = data->nspinfo;

      nsp_dbg(NSP_DEBUG_INIT, "end");


      return host; /* detect done. */
}

/*----------------------------------------------------------------*/
/* return info string                                   */
/*----------------------------------------------------------------*/
static const char *nsp_info(struct Scsi_Host *shpnt)
{
      nsp_hw_data *data = (nsp_hw_data *)shpnt->hostdata;

      return data->nspinfo;
}

#undef SPRINTF
#define SPRINTF(args...) \
        do { \
            if(length > (pos - buffer)) { \
                  pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
                  nsp_dbg(NSP_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length,  length - (pos - buffer));\
            } \
      } while(0)

static int nsp_proc_info(struct Scsi_Host *host, char *buffer, char **start,
                   off_t offset, int length, int inout)
{
      int id;
      char *pos = buffer;
      int thislength;
      int speed;
      unsigned long flags;
      nsp_hw_data *data;
      int hostno;

      if (inout) {
            return -EINVAL;
      }

      hostno = host->host_no;
      data = (nsp_hw_data *)host->hostdata;


      SPRINTF("NinjaSCSI status\n\n");
      SPRINTF("Driver version:        $Revision: 1.23 $\n");
      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("burst transfer mode:   ");
      switch (nsp_burst_mode) {
      case BURST_IO8:
            SPRINTF("io8");
            break;
      case BURST_IO32:
            SPRINTF("io32");
            break;
      case BURST_MEM32:
            SPRINTF("mem32");
            break;
      default:
            SPRINTF("???");
            break;
      }
      SPRINTF("\n");


      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->Sync); id++) {

            SPRINTF("id %d: ", id);

            if (id == host->this_id) {
                  SPRINTF("----- NinjaSCSI-3 host adapter\n");
                  continue;
            }

            switch(data->Sync[id].SyncNegotiation) {
            case SYNC_OK:
                  SPRINTF(" sync");
                  break;
            case SYNC_NG:
                  SPRINTF("async");
                  break;
            case SYNC_NOT_YET:
                  SPRINTF(" none");
                  break;
            default:
                  SPRINTF("?????");
                  break;
            }

            if (data->Sync[id].SyncPeriod != 0) {
                  speed = 1000000 / (data->Sync[id].SyncPeriod * 4);

                  SPRINTF(" transfer %d.%dMB/s, offset %d",
                        speed / 1000,
                        speed % 1000,
                        data->Sync[id].SyncOffset
                        );
            }
            SPRINTF("\n");
      }

      thislength = pos - (buffer + offset);

      if(thislength < 0) {
            *start = NULL;
                return 0;
        }


      thislength = min(thislength, length);
      *start = buffer + offset;

      return thislength;
}
#undef SPRINTF

/*---------------------------------------------------------------*/
/* error handler                                                 */
/*---------------------------------------------------------------*/

/*
static int nsp_eh_abort(struct scsi_cmnd *SCpnt)
{
      nsp_dbg(NSP_DEBUG_BUSRESET, "SCpnt=0x%p", SCpnt);

      return nsp_eh_bus_reset(SCpnt);
}*/

static int nsp_bus_reset(nsp_hw_data *data)
{
      unsigned int base = data->BaseAddress;
      int        i;

      nsp_write(base, IRQCONTROL, IRQCONTROL_ALLMASK);

      nsp_index_write(base, SCSIBUSCTRL, SCSI_RST);
      mdelay(100); /* 100ms */
      nsp_index_write(base, SCSIBUSCTRL, 0);
      for(i = 0; i < 5; i++) {
            nsp_index_read(base, IRQPHASESENCE); /* dummy read */
      }

      nsphw_init_sync(data);

      nsp_write(base, IRQCONTROL, IRQCONTROL_ALLCLEAR);

      return SUCCESS;
}

static int nsp_eh_bus_reset(struct scsi_cmnd *SCpnt)
{
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;

      nsp_dbg(NSP_DEBUG_BUSRESET, "SCpnt=0x%p", SCpnt);

      return nsp_bus_reset(data);
}

static int nsp_eh_host_reset(struct scsi_cmnd *SCpnt)
{
      nsp_hw_data *data = (nsp_hw_data *)SCpnt->device->host->hostdata;

      nsp_dbg(NSP_DEBUG_BUSRESET, "in");

      nsphw_init(data);

      return SUCCESS;
}


/**********************************************************************
  PCMCIA functions
**********************************************************************/

/*======================================================================
    nsp_cs_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

    The dev_link structure is initialized, but we don't actually
    configure the card at this point -- we wait until we receive a
    card insertion event.
======================================================================*/
static int nsp_cs_probe(struct pcmcia_device *link)
{
      scsi_info_t  *info;
      nsp_hw_data  *data = &nsp_data_base;
      int ret;

      nsp_dbg(NSP_DEBUG_INIT, "in");

      /* Create new SCSI device */
      info = kzalloc(sizeof(*info), GFP_KERNEL);
      if (info == NULL) { return -ENOMEM; }
      info->p_dev = link;
      link->priv = info;
      data->ScsiInfo = info;

      nsp_dbg(NSP_DEBUG_INIT, "info=0x%p", info);

      /* The io structure describes IO port mapping */
      link->io.NumPorts1       = 0x10;
      link->io.Attributes1     = IO_DATA_PATH_WIDTH_AUTO;
      link->io.IOAddrLines     = 10;      /* not used */

      /* Interrupt setup */
      link->irq.Attributes     = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
      link->irq.IRQInfo1       = IRQ_LEVEL_ID;

      /* Interrupt handler */
      link->irq.Handler  = &nspintr;
      link->irq.Instance       = info;
      link->irq.Attributes     |= IRQF_SHARED;

      /* General socket configuration */
      link->conf.Attributes    = CONF_ENABLE_IRQ;
      link->conf.IntType       = INT_MEMORY_AND_IO;

      ret = nsp_cs_config(link);

      nsp_dbg(NSP_DEBUG_INIT, "link=0x%p", link);
      return ret;
} /* nsp_cs_attach */


/*======================================================================
    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.
======================================================================*/
static void nsp_cs_detach(struct pcmcia_device *link)
{
      nsp_dbg(NSP_DEBUG_INIT, "in, link=0x%p", link);

      ((scsi_info_t *)link->priv)->stop = 1;
      nsp_cs_release(link);

      kfree(link->priv);
      link->priv = NULL;
} /* nsp_cs_detach */


/*======================================================================
    nsp_cs_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    ethernet device available to the system.
======================================================================*/
#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
/*====================================================================*/
static int nsp_cs_config(struct pcmcia_device *link)
{
      int           ret;
      scsi_info_t  *info       = link->priv;
      tuple_t             tuple;
      cisparse_t    parse;
      int           last_ret, last_fn;
      unsigned char       tuple_data[64];
      config_info_t       conf;
      win_req_t         req;
      memreq_t          map;
      cistpl_cftable_entry_t dflt = { 0 };
      struct Scsi_Host *host;
      nsp_hw_data      *data = &nsp_data_base;

      nsp_dbg(NSP_DEBUG_INIT, "in");

      tuple.Attributes      = 0;
      tuple.TupleData         = tuple_data;
      tuple.TupleDataMax    = sizeof(tuple_data);
      tuple.TupleOffset     = 0;

      /* Look up the current Vcc */
      CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(link, &conf));

      tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
      CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
      while (1) {
            cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);

            if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
                        pcmcia_parse_tuple(link, &tuple, &parse) != 0)
                  goto next_entry;

            if (cfg->flags & CISTPL_CFTABLE_DEFAULT) { dflt = *cfg; }
            if (cfg->index == 0) { goto next_entry; }
            link->conf.ConfigIndex = cfg->index;

            /* Does this card need audio output? */
            if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
                  link->conf.Attributes |= CONF_ENABLE_SPKR;
                  link->conf.Status = CCSR_AUDIO_ENA;
            }

            /* Use power settings for Vcc and Vpp if present */
            /*  Note that the CIS values need to be rescaled */
            if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
                  if (conf.Vcc != cfg->vcc.param[CISTPL_POWER_VNOM]/10000) {
                        goto next_entry;
                  }
            } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
                  if (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM]/10000) {
                        goto next_entry;
                  }
            }

            if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM)) {
                  link->conf.Vpp =
                        cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
            } else if (dflt.vpp1.present & (1 << CISTPL_POWER_VNOM)) {
                  link->conf.Vpp =
                        dflt.vpp1.param[CISTPL_POWER_VNOM] / 10000;
            }

            /* Do we need to allocate an interrupt? */
            if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1) {
                  link->conf.Attributes |= CONF_ENABLE_IRQ;
            }

            /* IO window settings */
            link->io.NumPorts1 = link->io.NumPorts2 = 0;
            if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
                  cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
                  link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
                  if (!(io->flags & CISTPL_IO_8BIT))
                        link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
                  if (!(io->flags & CISTPL_IO_16BIT))
                        link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
                  link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
                  link->io.BasePort1 = io->win[0].base;
                  link->io.NumPorts1 = io->win[0].len;
                  if (io->nwin > 1) {
                        link->io.Attributes2 = link->io.Attributes1;
                        link->io.BasePort2 = io->win[1].base;
                        link->io.NumPorts2 = io->win[1].len;
                  }
                  /* This reserves IO space but doesn't actually enable it */
                  if (pcmcia_request_io(link, &link->io) != 0)
                        goto next_entry;
            }

            if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
                  cistpl_mem_t *mem =
                        (cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
                  req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
                  req.Attributes |= WIN_ENABLE;
                  req.Base = mem->win[0].host_addr;
                  req.Size = mem->win[0].len;
                  if (req.Size < 0x1000) {
                        req.Size = 0x1000;
                  }
                  req.AccessSpeed = 0;
                  if (pcmcia_request_window(&link, &req, &link->win) != 0)
                        goto next_entry;
                  map.Page = 0; map.CardOffset = mem->win[0].card_addr;
                  if (pcmcia_map_mem_page(link->win, &map) != 0)
                        goto next_entry;

                  data->MmioAddress = (unsigned long)ioremap_nocache(req.Base, req.Size);
                  data->MmioLength  = req.Size;
            }
            /* If we got this far, we're cool! */
            break;

      next_entry:
            nsp_dbg(NSP_DEBUG_INIT, "next");
            pcmcia_disable_device(link);
            CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(link, &tuple));
      }

      if (link->conf.Attributes & CONF_ENABLE_IRQ) {
            CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
      }
      CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));

      if (free_ports) {
            if (link->io.BasePort1) {
                  release_region(link->io.BasePort1, link->io.NumPorts1);
            }
            if (link->io.BasePort2) {
                  release_region(link->io.BasePort2, link->io.NumPorts2);
            }
      }

      /* Set port and IRQ */
      data->BaseAddress = link->io.BasePort1;
      data->NumAddress  = link->io.NumPorts1;
      data->IrqNumber   = link->irq.AssignedIRQ;

      nsp_dbg(NSP_DEBUG_INIT, "I/O[0x%x+0x%x] IRQ %d",
            data->BaseAddress, data->NumAddress, data->IrqNumber);

      if(nsphw_init(data) == FALSE) {
            goto cs_failed;
      }

      host = nsp_detect(&nsp_driver_template);

      if (host == NULL) {
            nsp_dbg(NSP_DEBUG_INIT, "detect failed");
            goto cs_failed;
      }


      ret = scsi_add_host (host, NULL);
      if (ret)
            goto cs_failed;

      scsi_scan_host(host);

      snprintf(info->node.dev_name, sizeof(info->node.dev_name), "scsi%d", host->host_no);
      link->dev_node  = &info->node;
      info->host = host;

      /* Finally, report what we've done */
      printk(KERN_INFO "nsp_cs: index 0x%02x: ",
             link->conf.ConfigIndex);
      if (link->conf.Vpp) {
            printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
      }
      if (link->conf.Attributes & CONF_ENABLE_IRQ) {
            printk(", irq %d", link->irq.AssignedIRQ);
      }
      if (link->io.NumPorts1) {
            printk(", io 0x%04x-0x%04x", link->io.BasePort1,
                   link->io.BasePort1+link->io.NumPorts1-1);
      }
      if (link->io.NumPorts2)
            printk(" & 0x%04x-0x%04x", link->io.BasePort2,
                   link->io.BasePort2+link->io.NumPorts2-1);
      if (link->win)
            printk(", mem 0x%06lx-0x%06lx", req.Base,
                   req.Base+req.Size-1);
      printk("\n");

      return 0;

 cs_failed:
      nsp_dbg(NSP_DEBUG_INIT, "config fail");
      cs_error(link, last_fn, last_ret);
      nsp_cs_release(link);

      return -ENODEV;
} /* nsp_cs_config */
#undef CS_CHECK


/*======================================================================
    After a card is removed, nsp_cs_release() will unregister the net
    device, and release the PCMCIA configuration.  If the device is
    still open, this will be postponed until it is closed.
======================================================================*/
static void nsp_cs_release(struct pcmcia_device *link)
{
      scsi_info_t *info = link->priv;
      nsp_hw_data *data = NULL;

      if (info->host == NULL) {
            nsp_msg(KERN_DEBUG, "unexpected card release call.");
      } else {
            data = (nsp_hw_data *)info->host->hostdata;
      }

      nsp_dbg(NSP_DEBUG_INIT, "link=0x%p", link);

      /* Unlink the device chain */
      if (info->host != NULL) {
            scsi_remove_host(info->host);
      }
      link->dev_node = NULL;

      if (link->win) {
            if (data != NULL) {
                  iounmap((void *)(data->MmioAddress));
            }
      }
      pcmcia_disable_device(link);

      if (info->host != NULL) {
            scsi_host_put(info->host);
      }
} /* nsp_cs_release */

static int nsp_cs_suspend(struct pcmcia_device *link)
{
      scsi_info_t *info = link->priv;
      nsp_hw_data *data;

      nsp_dbg(NSP_DEBUG_INIT, "event: suspend");

      if (info->host != NULL) {
            nsp_msg(KERN_INFO, "clear SDTR status");

            data = (nsp_hw_data *)info->host->hostdata;

            nsphw_init_sync(data);
      }

      info->stop = 1;

      return 0;
}

static int nsp_cs_resume(struct pcmcia_device *link)
{
      scsi_info_t *info = link->priv;
      nsp_hw_data *data;

      nsp_dbg(NSP_DEBUG_INIT, "event: resume");

      info->stop = 0;

      if (info->host != NULL) {
            nsp_msg(KERN_INFO, "reset host and bus");

            data = (nsp_hw_data *)info->host->hostdata;

            nsphw_init   (data);
            nsp_bus_reset(data);
      }

      return 0;
}

/*======================================================================*
 *    module entry point
 *====================================================================*/
static struct pcmcia_device_id nsp_cs_ids[] = {
      PCMCIA_DEVICE_PROD_ID123("IO DATA", "CBSC16       ", "1", 0x547e66dc, 0x0d63a3fd, 0x51de003a),
      PCMCIA_DEVICE_PROD_ID123("KME    ", "SCSI-CARD-001", "1", 0x534c02bc, 0x52008408, 0x51de003a),
      PCMCIA_DEVICE_PROD_ID123("KME    ", "SCSI-CARD-002", "1", 0x534c02bc, 0xcb09d5b2, 0x51de003a),
      PCMCIA_DEVICE_PROD_ID123("KME    ", "SCSI-CARD-003", "1", 0x534c02bc, 0xbc0ee524, 0x51de003a),
      PCMCIA_DEVICE_PROD_ID123("KME    ", "SCSI-CARD-004", "1", 0x534c02bc, 0x226a7087, 0x51de003a),
      PCMCIA_DEVICE_PROD_ID123("WBT", "NinjaSCSI-3", "R1.0", 0xc7ba805f, 0xfdc7c97d, 0x6973710e),
      PCMCIA_DEVICE_PROD_ID123("WORKBIT", "UltraNinja-16", "1", 0x28191418, 0xb70f4b09, 0x51de003a),
      PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, nsp_cs_ids);

static struct pcmcia_driver nsp_driver = {
      .owner            = THIS_MODULE,
      .drv        = {
            .name = "nsp_cs",
      },
      .probe            = nsp_cs_probe,
      .remove           = nsp_cs_detach,
      .id_table   = nsp_cs_ids,
      .suspend    = nsp_cs_suspend,
      .resume           = nsp_cs_resume,
};

static int __init nsp_cs_init(void)
{
      nsp_msg(KERN_INFO, "loading...");

      return pcmcia_register_driver(&nsp_driver);
}

static void __exit nsp_cs_exit(void)
{
      nsp_msg(KERN_INFO, "unloading...");
      pcmcia_unregister_driver(&nsp_driver);
}


module_init(nsp_cs_init)
module_exit(nsp_cs_exit)

/* end */

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