linux/drivers/scsi/nsp32.c
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   1/*
   2 * NinjaSCSI-32Bi Cardbus, NinjaSCSI-32UDE PCI/CardBus SCSI driver
   3 * Copyright (C) 2001, 2002, 2003
   4 *      YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
   5 *      GOTO Masanori <gotom@debian.or.jp>, <gotom@debian.org>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2, or (at your option)
  10 * any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 *
  18 * Revision History:
  19 *   1.0: Initial Release.
  20 *   1.1: Add /proc SDTR status.
  21 *        Remove obsolete error handler nsp32_reset.
  22 *        Some clean up.
  23 *   1.2: PowerPC (big endian) support.
  24 */
  25
  26#include <linux/module.h>
  27#include <linux/init.h>
  28#include <linux/kernel.h>
  29#include <linux/string.h>
  30#include <linux/timer.h>
  31#include <linux/ioport.h>
  32#include <linux/major.h>
  33#include <linux/blkdev.h>
  34#include <linux/interrupt.h>
  35#include <linux/pci.h>
  36#include <linux/delay.h>
  37#include <linux/ctype.h>
  38#include <linux/dma-mapping.h>
  39
  40#include <asm/dma.h>
  41#include <asm/io.h>
  42
  43#include <scsi/scsi.h>
  44#include <scsi/scsi_cmnd.h>
  45#include <scsi/scsi_device.h>
  46#include <scsi/scsi_host.h>
  47#include <scsi/scsi_ioctl.h>
  48
  49#include "nsp32.h"
  50
  51
  52/***********************************************************************
  53 * Module parameters
  54 */
  55static int       trans_mode = 0;        /* default: BIOS */
  56module_param     (trans_mode, int, 0);
  57MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
  58#define ASYNC_MODE    1
  59#define ULTRA20M_MODE 2
  60
  61static bool      auto_param = 0;        /* default: ON */
  62module_param     (auto_param, bool, 0);
  63MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
  64
  65static bool      disc_priv  = 1;        /* default: OFF */
  66module_param     (disc_priv, bool, 0);
  67MODULE_PARM_DESC(disc_priv,  "disconnection privilege mode (0: ON 1: OFF(default))");
  68
  69MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
  70MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
  71MODULE_LICENSE("GPL");
  72
  73static const char *nsp32_release_version = "1.2";
  74
  75
  76/****************************************************************************
  77 * Supported hardware
  78 */
  79static struct pci_device_id nsp32_pci_table[] = {
  80        {
  81                .vendor      = PCI_VENDOR_ID_IODATA,
  82                .device      = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
  83                .subvendor   = PCI_ANY_ID,
  84                .subdevice   = PCI_ANY_ID,
  85                .driver_data = MODEL_IODATA,
  86        },
  87        {
  88                .vendor      = PCI_VENDOR_ID_WORKBIT,
  89                .device      = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
  90                .subvendor   = PCI_ANY_ID,
  91                .subdevice   = PCI_ANY_ID,
  92                .driver_data = MODEL_KME,
  93        },
  94        {
  95                .vendor      = PCI_VENDOR_ID_WORKBIT,
  96                .device      = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
  97                .subvendor   = PCI_ANY_ID,
  98                .subdevice   = PCI_ANY_ID,
  99                .driver_data = MODEL_WORKBIT,
 100        },
 101        {
 102                .vendor      = PCI_VENDOR_ID_WORKBIT,
 103                .device      = PCI_DEVICE_ID_WORKBIT_STANDARD,
 104                .subvendor   = PCI_ANY_ID,
 105                .subdevice   = PCI_ANY_ID,
 106                .driver_data = MODEL_PCI_WORKBIT,
 107        },
 108        {
 109                .vendor      = PCI_VENDOR_ID_WORKBIT,
 110                .device      = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
 111                .subvendor   = PCI_ANY_ID,
 112                .subdevice   = PCI_ANY_ID,
 113                .driver_data = MODEL_LOGITEC,
 114        },
 115        {
 116                .vendor      = PCI_VENDOR_ID_WORKBIT,
 117                .device      = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
 118                .subvendor   = PCI_ANY_ID,
 119                .subdevice   = PCI_ANY_ID,
 120                .driver_data = MODEL_PCI_LOGITEC,
 121        },
 122        {
 123                .vendor      = PCI_VENDOR_ID_WORKBIT,
 124                .device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
 125                .subvendor   = PCI_ANY_ID,
 126                .subdevice   = PCI_ANY_ID,
 127                .driver_data = MODEL_PCI_MELCO,
 128        },
 129        {
 130                .vendor      = PCI_VENDOR_ID_WORKBIT,
 131                .device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
 132                .subvendor   = PCI_ANY_ID,
 133                .subdevice   = PCI_ANY_ID,
 134                .driver_data = MODEL_PCI_MELCO,
 135        },
 136        {0,0,},
 137};
 138MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
 139
 140static nsp32_hw_data nsp32_data_base;  /* probe <-> detect glue */
 141
 142
 143/*
 144 * Period/AckWidth speed conversion table
 145 *
 146 * Note: This period/ackwidth speed table must be in descending order.
 147 */
 148static nsp32_sync_table nsp32_sync_table_40M[] = {
 149     /* {PNo, AW,   SP,   EP, SREQ smpl}  Speed(MB/s) Period AckWidth */
 150        {0x1,  0, 0x0c, 0x0c, SMPL_40M},  /*  20.0 :  50ns,  25ns */
 151        {0x2,  0, 0x0d, 0x18, SMPL_40M},  /*  13.3 :  75ns,  25ns */
 152        {0x3,  1, 0x19, 0x19, SMPL_40M},  /*  10.0 : 100ns,  50ns */
 153        {0x4,  1, 0x1a, 0x1f, SMPL_20M},  /*   8.0 : 125ns,  50ns */
 154        {0x5,  2, 0x20, 0x25, SMPL_20M},  /*   6.7 : 150ns,  75ns */
 155        {0x6,  2, 0x26, 0x31, SMPL_20M},  /*   5.7 : 175ns,  75ns */
 156        {0x7,  3, 0x32, 0x32, SMPL_20M},  /*   5.0 : 200ns, 100ns */
 157        {0x8,  3, 0x33, 0x38, SMPL_10M},  /*   4.4 : 225ns, 100ns */
 158        {0x9,  3, 0x39, 0x3e, SMPL_10M},  /*   4.0 : 250ns, 100ns */
 159};
 160
 161static nsp32_sync_table nsp32_sync_table_20M[] = {
 162        {0x1,  0, 0x19, 0x19, SMPL_40M},  /* 10.0 : 100ns,  50ns */
 163        {0x2,  0, 0x1a, 0x25, SMPL_20M},  /*  6.7 : 150ns,  50ns */
 164        {0x3,  1, 0x26, 0x32, SMPL_20M},  /*  5.0 : 200ns, 100ns */
 165        {0x4,  1, 0x33, 0x3e, SMPL_10M},  /*  4.0 : 250ns, 100ns */
 166        {0x5,  2, 0x3f, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 150ns */
 167        {0x6,  2, 0x4c, 0x57, SMPL_10M},  /*  2.8 : 350ns, 150ns */
 168        {0x7,  3, 0x58, 0x64, SMPL_10M},  /*  2.5 : 400ns, 200ns */
 169        {0x8,  3, 0x65, 0x70, SMPL_10M},  /*  2.2 : 450ns, 200ns */
 170        {0x9,  3, 0x71, 0x7d, SMPL_10M},  /*  2.0 : 500ns, 200ns */
 171};
 172
 173static nsp32_sync_table nsp32_sync_table_pci[] = {
 174        {0x1,  0, 0x0c, 0x0f, SMPL_40M},  /* 16.6 :  60ns,  30ns */
 175        {0x2,  0, 0x10, 0x16, SMPL_40M},  /* 11.1 :  90ns,  30ns */
 176        {0x3,  1, 0x17, 0x1e, SMPL_20M},  /*  8.3 : 120ns,  60ns */
 177        {0x4,  1, 0x1f, 0x25, SMPL_20M},  /*  6.7 : 150ns,  60ns */
 178        {0x5,  2, 0x26, 0x2d, SMPL_20M},  /*  5.6 : 180ns,  90ns */
 179        {0x6,  2, 0x2e, 0x34, SMPL_10M},  /*  4.8 : 210ns,  90ns */
 180        {0x7,  3, 0x35, 0x3c, SMPL_10M},  /*  4.2 : 240ns, 120ns */
 181        {0x8,  3, 0x3d, 0x43, SMPL_10M},  /*  3.7 : 270ns, 120ns */
 182        {0x9,  3, 0x44, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 120ns */
 183};
 184
 185/*
 186 * function declaration
 187 */
 188/* module entry point */
 189static int         nsp32_probe (struct pci_dev *, const struct pci_device_id *);
 190static void        nsp32_remove(struct pci_dev *);
 191static int  __init init_nsp32  (void);
 192static void __exit exit_nsp32  (void);
 193
 194/* struct struct scsi_host_template */
 195static int         nsp32_show_info   (struct seq_file *, struct Scsi_Host *);
 196
 197static int         nsp32_detect      (struct pci_dev *pdev);
 198static int         nsp32_queuecommand(struct Scsi_Host *, struct scsi_cmnd *);
 199static const char *nsp32_info        (struct Scsi_Host *);
 200static int         nsp32_release     (struct Scsi_Host *);
 201
 202/* SCSI error handler */
 203static int         nsp32_eh_abort     (struct scsi_cmnd *);
 204static int         nsp32_eh_bus_reset (struct scsi_cmnd *);
 205static int         nsp32_eh_host_reset(struct scsi_cmnd *);
 206
 207/* generate SCSI message */
 208static void nsp32_build_identify(struct scsi_cmnd *);
 209static void nsp32_build_nop     (struct scsi_cmnd *);
 210static void nsp32_build_reject  (struct scsi_cmnd *);
 211static void nsp32_build_sdtr    (struct scsi_cmnd *, unsigned char, unsigned char);
 212
 213/* SCSI message handler */
 214static int  nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
 215static void nsp32_msgout_occur (struct scsi_cmnd *);
 216static void nsp32_msgin_occur  (struct scsi_cmnd *, unsigned long, unsigned short);
 217
 218static int  nsp32_setup_sg_table    (struct scsi_cmnd *);
 219static int  nsp32_selection_autopara(struct scsi_cmnd *);
 220static int  nsp32_selection_autoscsi(struct scsi_cmnd *);
 221static void nsp32_scsi_done         (struct scsi_cmnd *);
 222static int  nsp32_arbitration       (struct scsi_cmnd *, unsigned int);
 223static int  nsp32_reselection       (struct scsi_cmnd *, unsigned char);
 224static void nsp32_adjust_busfree    (struct scsi_cmnd *, unsigned int);
 225static void nsp32_restart_autoscsi  (struct scsi_cmnd *, unsigned short);
 226
 227/* SCSI SDTR */
 228static void nsp32_analyze_sdtr       (struct scsi_cmnd *);
 229static int  nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
 230static void nsp32_set_async          (nsp32_hw_data *, nsp32_target *);
 231static void nsp32_set_max_sync       (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
 232static void nsp32_set_sync_entry     (nsp32_hw_data *, nsp32_target *, int, unsigned char);
 233
 234/* SCSI bus status handler */
 235static void nsp32_wait_req    (nsp32_hw_data *, int);
 236static void nsp32_wait_sack   (nsp32_hw_data *, int);
 237static void nsp32_sack_assert (nsp32_hw_data *);
 238static void nsp32_sack_negate (nsp32_hw_data *);
 239static void nsp32_do_bus_reset(nsp32_hw_data *);
 240
 241/* hardware interrupt handler */
 242static irqreturn_t do_nsp32_isr(int, void *);
 243
 244/* initialize hardware */
 245static int  nsp32hw_init(nsp32_hw_data *);
 246
 247/* EEPROM handler */
 248static        int  nsp32_getprom_param (nsp32_hw_data *);
 249static        int  nsp32_getprom_at24  (nsp32_hw_data *);
 250static        int  nsp32_getprom_c16   (nsp32_hw_data *);
 251static        void nsp32_prom_start    (nsp32_hw_data *);
 252static        void nsp32_prom_stop     (nsp32_hw_data *);
 253static        int  nsp32_prom_read     (nsp32_hw_data *, int);
 254static        int  nsp32_prom_read_bit (nsp32_hw_data *);
 255static        void nsp32_prom_write_bit(nsp32_hw_data *, int);
 256static        void nsp32_prom_set      (nsp32_hw_data *, int, int);
 257static        int  nsp32_prom_get      (nsp32_hw_data *, int);
 258
 259/* debug/warning/info message */
 260static void nsp32_message (const char *, int, char *, char *, ...);
 261#ifdef NSP32_DEBUG
 262static void nsp32_dmessage(const char *, int, int,    char *, ...);
 263#endif
 264
 265/*
 266 * max_sectors is currently limited up to 128.
 267 */
 268static struct scsi_host_template nsp32_template = {
 269        .proc_name                      = "nsp32",
 270        .name                           = "Workbit NinjaSCSI-32Bi/UDE",
 271        .show_info                      = nsp32_show_info,
 272        .info                           = nsp32_info,
 273        .queuecommand                   = nsp32_queuecommand,
 274        .can_queue                      = 1,
 275        .sg_tablesize                   = NSP32_SG_SIZE,
 276        .max_sectors                    = 128,
 277        .cmd_per_lun                    = 1,
 278        .this_id                        = NSP32_HOST_SCSIID,
 279        .use_clustering                 = DISABLE_CLUSTERING,
 280        .eh_abort_handler               = nsp32_eh_abort,
 281        .eh_bus_reset_handler           = nsp32_eh_bus_reset,
 282        .eh_host_reset_handler          = nsp32_eh_host_reset,
 283/*      .highmem_io                     = 1, */
 284};
 285
 286#include "nsp32_io.h"
 287
 288/***********************************************************************
 289 * debug, error print
 290 */
 291#ifndef NSP32_DEBUG
 292# define NSP32_DEBUG_MASK             0x000000
 293# define nsp32_msg(type, args...)     nsp32_message ("", 0, (type), args)
 294# define nsp32_dbg(mask, args...)     /* */
 295#else
 296# define NSP32_DEBUG_MASK             0xffffff
 297# define nsp32_msg(type, args...) \
 298        nsp32_message (__func__, __LINE__, (type), args)
 299# define nsp32_dbg(mask, args...) \
 300        nsp32_dmessage(__func__, __LINE__, (mask), args)
 301#endif
 302
 303#define NSP32_DEBUG_QUEUECOMMAND        BIT(0)
 304#define NSP32_DEBUG_REGISTER            BIT(1)
 305#define NSP32_DEBUG_AUTOSCSI            BIT(2)
 306#define NSP32_DEBUG_INTR                BIT(3)
 307#define NSP32_DEBUG_SGLIST              BIT(4)
 308#define NSP32_DEBUG_BUSFREE             BIT(5)
 309#define NSP32_DEBUG_CDB_CONTENTS        BIT(6)
 310#define NSP32_DEBUG_RESELECTION         BIT(7)
 311#define NSP32_DEBUG_MSGINOCCUR          BIT(8)
 312#define NSP32_DEBUG_EEPROM              BIT(9)
 313#define NSP32_DEBUG_MSGOUTOCCUR         BIT(10)
 314#define NSP32_DEBUG_BUSRESET            BIT(11)
 315#define NSP32_DEBUG_RESTART             BIT(12)
 316#define NSP32_DEBUG_SYNC                BIT(13)
 317#define NSP32_DEBUG_WAIT                BIT(14)
 318#define NSP32_DEBUG_TARGETFLAG          BIT(15)
 319#define NSP32_DEBUG_PROC                BIT(16)
 320#define NSP32_DEBUG_INIT                BIT(17)
 321#define NSP32_SPECIAL_PRINT_REGISTER    BIT(20)
 322
 323#define NSP32_DEBUG_BUF_LEN             100
 324
 325static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
 326{
 327        va_list args;
 328        char buf[NSP32_DEBUG_BUF_LEN];
 329
 330        va_start(args, fmt);
 331        vsnprintf(buf, sizeof(buf), fmt, args);
 332        va_end(args);
 333
 334#ifndef NSP32_DEBUG
 335        printk("%snsp32: %s\n", type, buf);
 336#else
 337        printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
 338#endif
 339}
 340
 341#ifdef NSP32_DEBUG
 342static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
 343{
 344        va_list args;
 345        char buf[NSP32_DEBUG_BUF_LEN];
 346
 347        va_start(args, fmt);
 348        vsnprintf(buf, sizeof(buf), fmt, args);
 349        va_end(args);
 350
 351        if (mask & NSP32_DEBUG_MASK) {
 352                printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
 353        }
 354}
 355#endif
 356
 357#ifdef NSP32_DEBUG
 358# include "nsp32_debug.c"
 359#else
 360# define show_command(arg)   /* */
 361# define show_busphase(arg)  /* */
 362# define show_autophase(arg) /* */
 363#endif
 364
 365/*
 366 * IDENTIFY Message
 367 */
 368static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
 369{
 370        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 371        int pos             = data->msgout_len;
 372        int mode            = FALSE;
 373
 374        /* XXX: Auto DiscPriv detection is progressing... */
 375        if (disc_priv == 0) {
 376                /* mode = TRUE; */
 377        }
 378
 379        data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
 380
 381        data->msgout_len = pos;
 382}
 383
 384/*
 385 * SDTR Message Routine
 386 */
 387static void nsp32_build_sdtr(struct scsi_cmnd    *SCpnt,
 388                             unsigned char period,
 389                             unsigned char offset)
 390{
 391        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 392        int pos             = data->msgout_len;
 393
 394        data->msgoutbuf[pos] = EXTENDED_MESSAGE;  pos++;
 395        data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
 396        data->msgoutbuf[pos] = EXTENDED_SDTR;     pos++;
 397        data->msgoutbuf[pos] = period;            pos++;
 398        data->msgoutbuf[pos] = offset;            pos++;
 399
 400        data->msgout_len = pos;
 401}
 402
 403/*
 404 * No Operation Message
 405 */
 406static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
 407{
 408        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 409        int            pos  = data->msgout_len;
 410
 411        if (pos != 0) {
 412                nsp32_msg(KERN_WARNING,
 413                          "Some messages are already contained!");
 414                return;
 415        }
 416
 417        data->msgoutbuf[pos] = NOP; pos++;
 418        data->msgout_len = pos;
 419}
 420
 421/*
 422 * Reject Message
 423 */
 424static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
 425{
 426        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 427        int            pos  = data->msgout_len;
 428
 429        data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
 430        data->msgout_len = pos;
 431}
 432        
 433/*
 434 * timer
 435 */
 436#if 0
 437static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
 438{
 439        unsigned int base = SCpnt->host->io_port;
 440
 441        nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
 442
 443        if (time & (~TIMER_CNT_MASK)) {
 444                nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
 445        }
 446
 447        nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
 448}
 449#endif
 450
 451
 452/*
 453 * set SCSI command and other parameter to asic, and start selection phase
 454 */
 455static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
 456{
 457        nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 458        unsigned int    base    = SCpnt->device->host->io_port;
 459        unsigned int    host_id = SCpnt->device->host->this_id;
 460        unsigned char   target  = scmd_id(SCpnt);
 461        nsp32_autoparam *param  = data->autoparam;
 462        unsigned char   phase;
 463        int             i, ret;
 464        unsigned int    msgout;
 465        u16_le          s;
 466
 467        nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
 468
 469        /*
 470         * check bus free
 471         */
 472        phase = nsp32_read1(base, SCSI_BUS_MONITOR);
 473        if (phase != BUSMON_BUS_FREE) {
 474                nsp32_msg(KERN_WARNING, "bus busy");
 475                show_busphase(phase & BUSMON_PHASE_MASK);
 476                SCpnt->result = DID_BUS_BUSY << 16;
 477                return FALSE;
 478        }
 479
 480        /*
 481         * message out
 482         *
 483         * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
 484         *       over 3 messages needs another routine.
 485         */
 486        if (data->msgout_len == 0) {
 487                nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
 488                SCpnt->result = DID_ERROR << 16;
 489                return FALSE;
 490        } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
 491                msgout = 0;
 492                for (i = 0; i < data->msgout_len; i++) {
 493                        /*
 494                         * the sending order of the message is:
 495                         *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
 496                         *  MCNT 2:          MSG#1 -> MSG#2
 497                         *  MCNT 1:                   MSG#2    
 498                         */
 499                        msgout >>= 8;
 500                        msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
 501                }
 502                msgout |= MV_VALID;     /* MV valid */
 503                msgout |= (unsigned int)data->msgout_len; /* len */
 504        } else {
 505                /* data->msgout_len > 3 */
 506                msgout = 0;
 507        }
 508
 509        // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
 510        // nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
 511
 512        /*
 513         * setup asic parameter
 514         */
 515        memset(param, 0, sizeof(nsp32_autoparam));
 516
 517        /* cdb */
 518        for (i = 0; i < SCpnt->cmd_len; i++) {
 519                param->cdb[4 * i] = SCpnt->cmnd[i];
 520        }
 521
 522        /* outgoing messages */
 523        param->msgout = cpu_to_le32(msgout);
 524
 525        /* syncreg, ackwidth, target id, SREQ sampling rate */
 526        param->syncreg    = data->cur_target->syncreg;
 527        param->ackwidth   = data->cur_target->ackwidth;
 528        param->target_id  = BIT(host_id) | BIT(target);
 529        param->sample_reg = data->cur_target->sample_reg;
 530
 531        // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
 532
 533        /* command control */
 534        param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
 535                                             AUTOSCSI_START         |
 536                                             AUTO_MSGIN_00_OR_04    |
 537                                             AUTO_MSGIN_02          |
 538                                             AUTO_ATN               );
 539
 540
 541        /* transfer control */
 542        s = 0;
 543        switch (data->trans_method) {
 544        case NSP32_TRANSFER_BUSMASTER:
 545                s |= BM_START;
 546                break;
 547        case NSP32_TRANSFER_MMIO:
 548                s |= CB_MMIO_MODE;
 549                break;
 550        case NSP32_TRANSFER_PIO:
 551                s |= CB_IO_MODE;
 552                break;
 553        default:
 554                nsp32_msg(KERN_ERR, "unknown trans_method");
 555                break;
 556        }
 557        /*
 558         * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
 559         * For bus master transfer, it's taken off.
 560         */
 561        s |= (TRANSFER_GO | ALL_COUNTER_CLR);
 562        param->transfer_control = cpu_to_le16(s);
 563
 564        /* sg table addr */
 565        param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
 566
 567        /*
 568         * transfer parameter to ASIC
 569         */
 570        nsp32_write4(base, SGT_ADR,         data->auto_paddr);
 571        nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
 572                                            AUTO_PARAMETER         );
 573
 574        /*
 575         * Check arbitration
 576         */
 577        ret = nsp32_arbitration(SCpnt, base);
 578
 579        return ret;
 580}
 581
 582
 583/*
 584 * Selection with AUTO SCSI (without AUTO PARAMETER)
 585 */
 586static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
 587{
 588        nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 589        unsigned int    base    = SCpnt->device->host->io_port;
 590        unsigned int    host_id = SCpnt->device->host->this_id;
 591        unsigned char   target  = scmd_id(SCpnt);
 592        unsigned char   phase;
 593        int             status;
 594        unsigned short  command = 0;
 595        unsigned int    msgout  = 0;
 596        unsigned short  execph;
 597        int             i;
 598
 599        nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
 600
 601        /*
 602         * IRQ disable
 603         */
 604        nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
 605
 606        /*
 607         * check bus line
 608         */
 609        phase = nsp32_read1(base, SCSI_BUS_MONITOR);
 610        if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
 611                nsp32_msg(KERN_WARNING, "bus busy");
 612                SCpnt->result = DID_BUS_BUSY << 16;
 613                status = 1;
 614                goto out;
 615        }
 616
 617        /*
 618         * clear execph
 619         */
 620        execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
 621
 622        /*
 623         * clear FIFO counter to set CDBs
 624         */
 625        nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
 626
 627        /*
 628         * set CDB0 - CDB15
 629         */
 630        for (i = 0; i < SCpnt->cmd_len; i++) {
 631                nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
 632        }
 633        nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
 634
 635        /*
 636         * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
 637         */
 638        nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
 639
 640        /*
 641         * set SCSI MSGOUT REG
 642         *
 643         * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
 644         *       over 3 messages needs another routine.
 645         */
 646        if (data->msgout_len == 0) {
 647                nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
 648                SCpnt->result = DID_ERROR << 16;
 649                status = 1;
 650                goto out;
 651        } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
 652                msgout = 0;
 653                for (i = 0; i < data->msgout_len; i++) {
 654                        /*
 655                         * the sending order of the message is:
 656                         *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
 657                         *  MCNT 2:          MSG#1 -> MSG#2
 658                         *  MCNT 1:                   MSG#2    
 659                         */
 660                        msgout >>= 8;
 661                        msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
 662                }
 663                msgout |= MV_VALID;     /* MV valid */
 664                msgout |= (unsigned int)data->msgout_len; /* len */
 665                nsp32_write4(base, SCSI_MSG_OUT, msgout);
 666        } else {
 667                /* data->msgout_len > 3 */
 668                nsp32_write4(base, SCSI_MSG_OUT, 0);
 669        }
 670
 671        /*
 672         * set selection timeout(= 250ms)
 673         */
 674        nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
 675
 676        /*
 677         * set SREQ hazard killer sampling rate
 678         * 
 679         * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
 680         *      check other internal clock!
 681         */
 682        nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
 683
 684        /*
 685         * clear Arbit
 686         */
 687        nsp32_write1(base, SET_ARBIT,      ARBIT_CLEAR);
 688
 689        /*
 690         * set SYNCREG
 691         * Don't set BM_START_ADR before setting this register.
 692         */
 693        nsp32_write1(base, SYNC_REG,  data->cur_target->syncreg);
 694
 695        /*
 696         * set ACKWIDTH
 697         */
 698        nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
 699
 700        nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
 701                  "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
 702                  nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
 703                  nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
 704        nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
 705                  data->msgout_len, msgout);
 706
 707        /*
 708         * set SGT ADDR (physical address)
 709         */
 710        nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
 711
 712        /*
 713         * set TRANSFER CONTROL REG
 714         */
 715        command = 0;
 716        command |= (TRANSFER_GO | ALL_COUNTER_CLR);
 717        if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
 718                if (scsi_bufflen(SCpnt) > 0) {
 719                        command |= BM_START;
 720                }
 721        } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
 722                command |= CB_MMIO_MODE;
 723        } else if (data->trans_method & NSP32_TRANSFER_PIO) {
 724                command |= CB_IO_MODE;
 725        }
 726        nsp32_write2(base, TRANSFER_CONTROL, command);
 727
 728        /*
 729         * start AUTO SCSI, kick off arbitration
 730         */
 731        command = (CLEAR_CDB_FIFO_POINTER |
 732                   AUTOSCSI_START         |
 733                   AUTO_MSGIN_00_OR_04    |
 734                   AUTO_MSGIN_02          |
 735                   AUTO_ATN                );
 736        nsp32_write2(base, COMMAND_CONTROL, command);
 737
 738        /*
 739         * Check arbitration
 740         */
 741        status = nsp32_arbitration(SCpnt, base);
 742
 743 out:
 744        /*
 745         * IRQ enable
 746         */
 747        nsp32_write2(base, IRQ_CONTROL, 0);
 748
 749        return status;
 750}
 751
 752
 753/*
 754 * Arbitration Status Check
 755 *      
 756 * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
 757 *       Using udelay(1) consumes CPU time and system time, but 
 758 *       arbitration delay time is defined minimal 2.4us in SCSI
 759 *       specification, thus udelay works as coarse grained wait timer.
 760 */
 761static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
 762{
 763        unsigned char arbit;
 764        int           status = TRUE;
 765        int           time   = 0;
 766
 767        do {
 768                arbit = nsp32_read1(base, ARBIT_STATUS);
 769                time++;
 770        } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
 771                 (time <= ARBIT_TIMEOUT_TIME));
 772
 773        nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
 774                  "arbit: 0x%x, delay time: %d", arbit, time);
 775
 776        if (arbit & ARBIT_WIN) {
 777                /* Arbitration succeeded */
 778                SCpnt->result = DID_OK << 16;
 779                nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
 780        } else if (arbit & ARBIT_FAIL) {
 781                /* Arbitration failed */
 782                SCpnt->result = DID_BUS_BUSY << 16;
 783                status = FALSE;
 784        } else {
 785                /*
 786                 * unknown error or ARBIT_GO timeout,
 787                 * something lock up! guess no connection.
 788                 */
 789                nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
 790                SCpnt->result = DID_NO_CONNECT << 16;
 791                status = FALSE;
 792        }
 793
 794        /*
 795         * clear Arbit
 796         */
 797        nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
 798
 799        return status;
 800}
 801
 802
 803/*
 804 * reselection
 805 *
 806 * Note: This reselection routine is called from msgin_occur,
 807 *       reselection target id&lun must be already set.
 808 *       SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
 809 */
 810static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
 811{
 812        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 813        unsigned int   host_id = SCpnt->device->host->this_id;
 814        unsigned int   base    = SCpnt->device->host->io_port;
 815        unsigned char  tmpid, newid;
 816
 817        nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
 818
 819        /*
 820         * calculate reselected SCSI ID
 821         */
 822        tmpid = nsp32_read1(base, RESELECT_ID);
 823        tmpid &= (~BIT(host_id));
 824        newid = 0;
 825        while (tmpid) {
 826                if (tmpid & 1) {
 827                        break;
 828                }
 829                tmpid >>= 1;
 830                newid++;
 831        }
 832
 833        /*
 834         * If reselected New ID:LUN is not existed
 835         * or current nexus is not existed, unexpected
 836         * reselection is occurred. Send reject message.
 837         */
 838        if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
 839                nsp32_msg(KERN_WARNING, "unknown id/lun");
 840                return FALSE;
 841        } else if(data->lunt[newid][newlun].SCpnt == NULL) {
 842                nsp32_msg(KERN_WARNING, "no SCSI command is processing");
 843                return FALSE;
 844        }
 845
 846        data->cur_id    = newid;
 847        data->cur_lun   = newlun;
 848        data->cur_target = &(data->target[newid]);
 849        data->cur_lunt   = &(data->lunt[newid][newlun]);
 850
 851        /* reset SACK/SavedACK counter (or ALL clear?) */
 852        nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
 853
 854        return TRUE;
 855}
 856
 857
 858/*
 859 * nsp32_setup_sg_table - build scatter gather list for transfer data
 860 *                          with bus master.
 861 *
 862 * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
 863 */
 864static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
 865{
 866        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 867        struct scatterlist *sg;
 868        nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
 869        int num, i;
 870        u32_le l;
 871
 872        if (sgt == NULL) {
 873                nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
 874                return FALSE;
 875        }
 876
 877        num = scsi_dma_map(SCpnt);
 878        if (!num)
 879                return TRUE;
 880        else if (num < 0)
 881                return FALSE;
 882        else {
 883                scsi_for_each_sg(SCpnt, sg, num, i) {
 884                        /*
 885                         * Build nsp32_sglist, substitute sg dma addresses.
 886                         */
 887                        sgt[i].addr = cpu_to_le32(sg_dma_address(sg));
 888                        sgt[i].len  = cpu_to_le32(sg_dma_len(sg));
 889
 890                        if (le32_to_cpu(sgt[i].len) > 0x10000) {
 891                                nsp32_msg(KERN_ERR,
 892                                        "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
 893                                return FALSE;
 894                        }
 895                        nsp32_dbg(NSP32_DEBUG_SGLIST,
 896                                  "num 0x%x : addr 0x%lx len 0x%lx",
 897                                  i,
 898                                  le32_to_cpu(sgt[i].addr),
 899                                  le32_to_cpu(sgt[i].len ));
 900                }
 901
 902                /* set end mark */
 903                l = le32_to_cpu(sgt[num-1].len);
 904                sgt[num-1].len = cpu_to_le32(l | SGTEND);
 905        }
 906
 907        return TRUE;
 908}
 909
 910static int nsp32_queuecommand_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
 911{
 912        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
 913        nsp32_target *target;
 914        nsp32_lunt   *cur_lunt;
 915        int ret;
 916
 917        nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
 918                  "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
 919                  "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
 920                  SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
 921                  scsi_sg_count(SCpnt), scsi_sglist(SCpnt), scsi_bufflen(SCpnt));
 922
 923        if (data->CurrentSC != NULL) {
 924                nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
 925                data->CurrentSC = NULL;
 926                SCpnt->result   = DID_NO_CONNECT << 16;
 927                done(SCpnt);
 928                return 0;
 929        }
 930
 931        /* check target ID is not same as this initiator ID */
 932        if (scmd_id(SCpnt) == SCpnt->device->host->this_id) {
 933                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
 934                SCpnt->result = DID_BAD_TARGET << 16;
 935                done(SCpnt);
 936                return 0;
 937        }
 938
 939        /* check target LUN is allowable value */
 940        if (SCpnt->device->lun >= MAX_LUN) {
 941                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
 942                SCpnt->result = DID_BAD_TARGET << 16;
 943                done(SCpnt);
 944                return 0;
 945        }
 946
 947        show_command(SCpnt);
 948
 949        SCpnt->scsi_done     = done;
 950        data->CurrentSC      = SCpnt;
 951        SCpnt->SCp.Status    = CHECK_CONDITION;
 952        SCpnt->SCp.Message   = 0;
 953        scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
 954
 955        SCpnt->SCp.ptr              = (char *)scsi_sglist(SCpnt);
 956        SCpnt->SCp.this_residual    = scsi_bufflen(SCpnt);
 957        SCpnt->SCp.buffer           = NULL;
 958        SCpnt->SCp.buffers_residual = 0;
 959
 960        /* initialize data */
 961        data->msgout_len        = 0;
 962        data->msgin_len         = 0;
 963        cur_lunt                = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
 964        cur_lunt->SCpnt         = SCpnt;
 965        cur_lunt->save_datp     = 0;
 966        cur_lunt->msgin03       = FALSE;
 967        data->cur_lunt          = cur_lunt;
 968        data->cur_id            = SCpnt->device->id;
 969        data->cur_lun           = SCpnt->device->lun;
 970
 971        ret = nsp32_setup_sg_table(SCpnt);
 972        if (ret == FALSE) {
 973                nsp32_msg(KERN_ERR, "SGT fail");
 974                SCpnt->result = DID_ERROR << 16;
 975                nsp32_scsi_done(SCpnt);
 976                return 0;
 977        }
 978
 979        /* Build IDENTIFY */
 980        nsp32_build_identify(SCpnt);
 981
 982        /* 
 983         * If target is the first time to transfer after the reset
 984         * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
 985         * message SDTR is needed to do synchronous transfer.
 986         */
 987        target = &data->target[scmd_id(SCpnt)];
 988        data->cur_target = target;
 989
 990        if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
 991                unsigned char period, offset;
 992
 993                if (trans_mode != ASYNC_MODE) {
 994                        nsp32_set_max_sync(data, target, &period, &offset);
 995                        nsp32_build_sdtr(SCpnt, period, offset);
 996                        target->sync_flag |= SDTR_INITIATOR;
 997                } else {
 998                        nsp32_set_async(data, target);
 999                        target->sync_flag |= SDTR_DONE;
1000                }
1001
1002                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1003                          "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
1004                          target->limit_entry, period, offset);
1005        } else if (target->sync_flag & SDTR_INITIATOR) {
1006                /*
1007                 * It was negotiating SDTR with target, sending from the
1008                 * initiator, but there are no chance to remove this flag.
1009                 * Set async because we don't get proper negotiation.
1010                 */
1011                nsp32_set_async(data, target);
1012                target->sync_flag &= ~SDTR_INITIATOR;
1013                target->sync_flag |= SDTR_DONE;
1014
1015                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1016                          "SDTR_INITIATOR: fall back to async");
1017        } else if (target->sync_flag & SDTR_TARGET) {
1018                /*
1019                 * It was negotiating SDTR with target, sending from target,
1020                 * but there are no chance to remove this flag.  Set async
1021                 * because we don't get proper negotiation.
1022                 */
1023                nsp32_set_async(data, target);
1024                target->sync_flag &= ~SDTR_TARGET;
1025                target->sync_flag |= SDTR_DONE;
1026
1027                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1028                          "Unknown SDTR from target is reached, fall back to async.");
1029        }
1030
1031        nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
1032                  "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
1033                  SCpnt->device->id, target->sync_flag, target->syncreg,
1034                  target->ackwidth);
1035
1036        /* Selection */
1037        if (auto_param == 0) {
1038                ret = nsp32_selection_autopara(SCpnt);
1039        } else {
1040                ret = nsp32_selection_autoscsi(SCpnt);
1041        }
1042
1043        if (ret != TRUE) {
1044                nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
1045                nsp32_scsi_done(SCpnt);
1046        }
1047
1048        return 0;
1049}
1050
1051static DEF_SCSI_QCMD(nsp32_queuecommand)
1052
1053/* initialize asic */
1054static int nsp32hw_init(nsp32_hw_data *data)
1055{
1056        unsigned int   base = data->BaseAddress;
1057        unsigned short irq_stat;
1058        unsigned long  lc_reg;
1059        unsigned char  power;
1060
1061        lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
1062        if ((lc_reg & 0xff00) == 0) {
1063                lc_reg |= (0x20 << 8);
1064                nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
1065        }
1066
1067        nsp32_write2(base, IRQ_CONTROL,        IRQ_CONTROL_ALL_IRQ_MASK);
1068        nsp32_write2(base, TRANSFER_CONTROL,   0);
1069        nsp32_write4(base, BM_CNT,             0);
1070        nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1071
1072        do {
1073                irq_stat = nsp32_read2(base, IRQ_STATUS);
1074                nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
1075        } while (irq_stat & IRQSTATUS_ANY_IRQ);
1076
1077        /*
1078         * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
1079         *  designated by specification.
1080         */
1081        if ((data->trans_method & NSP32_TRANSFER_PIO) ||
1082            (data->trans_method & NSP32_TRANSFER_MMIO)) {
1083                nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x40);
1084                nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
1085        } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
1086                nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x10);
1087                nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
1088        } else {
1089                nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
1090        }
1091
1092        nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
1093                  nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
1094                  nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
1095
1096        nsp32_index_write1(base, CLOCK_DIV, data->clock);
1097        nsp32_index_write1(base, BM_CYCLE,  MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
1098        nsp32_write1(base, PARITY_CONTROL, 0);  /* parity check is disable */
1099
1100        /*
1101         * initialize MISC_WRRD register
1102         * 
1103         * Note: Designated parameters is obeyed as following:
1104         *      MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
1105         *      MISC_MASTER_TERMINATION_SELECT:      It must be set.
1106         *      MISC_BMREQ_NEGATE_TIMING_SEL:        It should be set.
1107         *      MISC_AUTOSEL_TIMING_SEL:             It should be set.
1108         *      MISC_BMSTOP_CHANGE2_NONDATA_PHASE:   It should be set.
1109         *      MISC_DELAYED_BMSTART:                It's selected for safety.
1110         *
1111         * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
1112         *      we have to set TRANSFERCONTROL_BM_START as 0 and set
1113         *      appropriate value before restarting bus master transfer.
1114         */
1115        nsp32_index_write2(base, MISC_WR,
1116                           (SCSI_DIRECTION_DETECTOR_SELECT |
1117                            DELAYED_BMSTART                |
1118                            MASTER_TERMINATION_SELECT      |
1119                            BMREQ_NEGATE_TIMING_SEL        |
1120                            AUTOSEL_TIMING_SEL             |
1121                            BMSTOP_CHANGE2_NONDATA_PHASE));
1122
1123        nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
1124        power = nsp32_index_read1(base, TERM_PWR_CONTROL);
1125        if (!(power & SENSE)) {
1126                nsp32_msg(KERN_INFO, "term power on");
1127                nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
1128        }
1129
1130        nsp32_write2(base, TIMER_SET, TIMER_STOP);
1131        nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
1132
1133        nsp32_write1(base, SYNC_REG,     0);
1134        nsp32_write1(base, ACK_WIDTH,    0);
1135        nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
1136
1137        /*
1138         * enable to select designated IRQ (except for
1139         * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
1140         */
1141        nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ         |
1142                                             IRQSELECT_SCSIRESET_IRQ     |
1143                                             IRQSELECT_FIFO_SHLD_IRQ     |
1144                                             IRQSELECT_RESELECT_IRQ      |
1145                                             IRQSELECT_PHASE_CHANGE_IRQ  |
1146                                             IRQSELECT_AUTO_SCSI_SEQ_IRQ |
1147                                          //   IRQSELECT_BMCNTERR_IRQ      |
1148                                             IRQSELECT_TARGET_ABORT_IRQ  |
1149                                             IRQSELECT_MASTER_ABORT_IRQ );
1150        nsp32_write2(base, IRQ_CONTROL, 0);
1151
1152        /* PCI LED off */
1153        nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
1154        nsp32_index_write1(base, EXT_PORT,     LED_OFF);
1155
1156        return TRUE;
1157}
1158
1159
1160/* interrupt routine */
1161static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
1162{
1163        nsp32_hw_data *data = dev_id;
1164        unsigned int base = data->BaseAddress;
1165        struct scsi_cmnd *SCpnt = data->CurrentSC;
1166        unsigned short auto_stat, irq_stat, trans_stat;
1167        unsigned char busmon, busphase;
1168        unsigned long flags;
1169        int ret;
1170        int handled = 0;
1171        struct Scsi_Host *host = data->Host;
1172
1173        spin_lock_irqsave(host->host_lock, flags);
1174
1175        /*
1176         * IRQ check, then enable IRQ mask
1177         */
1178        irq_stat = nsp32_read2(base, IRQ_STATUS);
1179        nsp32_dbg(NSP32_DEBUG_INTR, 
1180                  "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
1181        /* is this interrupt comes from Ninja asic? */
1182        if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
1183                nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
1184                goto out2;
1185        }
1186        handled = 1;
1187        nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1188
1189        busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
1190        busphase = busmon & BUSMON_PHASE_MASK;
1191
1192        trans_stat = nsp32_read2(base, TRANSFER_STATUS);
1193        if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
1194                nsp32_msg(KERN_INFO, "card disconnect");
1195                if (data->CurrentSC != NULL) {
1196                        nsp32_msg(KERN_INFO, "clean up current SCSI command");
1197                        SCpnt->result = DID_BAD_TARGET << 16;
1198                        nsp32_scsi_done(SCpnt);
1199                }
1200                goto out;
1201        }
1202
1203        /* Timer IRQ */
1204        if (irq_stat & IRQSTATUS_TIMER_IRQ) {
1205                nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
1206                nsp32_write2(base, TIMER_SET, TIMER_STOP);
1207                goto out;
1208        }
1209
1210        /* SCSI reset */
1211        if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
1212                nsp32_msg(KERN_INFO, "detected someone do bus reset");
1213                nsp32_do_bus_reset(data);
1214                if (SCpnt != NULL) {
1215                        SCpnt->result = DID_RESET << 16;
1216                        nsp32_scsi_done(SCpnt);
1217                }
1218                goto out;
1219        }
1220
1221        if (SCpnt == NULL) {
1222                nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
1223                nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1224                goto out;
1225        }
1226
1227        /*
1228         * AutoSCSI Interrupt.
1229         * Note: This interrupt is occurred when AutoSCSI is finished.  Then
1230         * check SCSIEXECUTEPHASE, and do appropriate action.  Each phases are
1231         * recorded when AutoSCSI sequencer has been processed.
1232         */
1233        if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
1234                /* getting SCSI executed phase */
1235                auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
1236                nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1237
1238                /* Selection Timeout, go busfree phase. */
1239                if (auto_stat & SELECTION_TIMEOUT) {
1240                        nsp32_dbg(NSP32_DEBUG_INTR,
1241                                  "selection timeout occurred");
1242
1243                        SCpnt->result = DID_TIME_OUT << 16;
1244                        nsp32_scsi_done(SCpnt);
1245                        goto out;
1246                }
1247
1248                if (auto_stat & MSGOUT_PHASE) {
1249                        /*
1250                         * MsgOut phase was processed.
1251                         * If MSG_IN_OCCUER is not set, then MsgOut phase is
1252                         * completed. Thus, msgout_len must reset.  Otherwise,
1253                         * nothing to do here. If MSG_OUT_OCCUER is occurred,
1254                         * then we will encounter the condition and check.
1255                         */
1256                        if (!(auto_stat & MSG_IN_OCCUER) &&
1257                             (data->msgout_len <= 3)) {
1258                                /*
1259                                 * !MSG_IN_OCCUER && msgout_len <=3
1260                                 *   ---> AutoSCSI with MSGOUTreg is processed.
1261                                 */
1262                                data->msgout_len = 0;
1263                        };
1264
1265                        nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
1266                }
1267
1268                if ((auto_stat & DATA_IN_PHASE) &&
1269                    (scsi_get_resid(SCpnt) > 0) &&
1270                    ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
1271                        printk( "auto+fifo\n");
1272                        //nsp32_pio_read(SCpnt);
1273                }
1274
1275                if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
1276                        /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
1277                        nsp32_dbg(NSP32_DEBUG_INTR,
1278                                  "Data in/out phase processed");
1279
1280                        /* read BMCNT, SGT pointer addr */
1281                        nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx", 
1282                                    nsp32_read4(base, BM_CNT));
1283                        nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx", 
1284                                    nsp32_read4(base, SGT_ADR));
1285                        nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx", 
1286                                    nsp32_read4(base, SACK_CNT));
1287                        nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx", 
1288                                    nsp32_read4(base, SAVED_SACK_CNT));
1289
1290                        scsi_set_resid(SCpnt, 0); /* all data transferred! */
1291                }
1292
1293                /*
1294                 * MsgIn Occur
1295                 */
1296                if (auto_stat & MSG_IN_OCCUER) {
1297                        nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
1298                }
1299
1300                /*
1301                 * MsgOut Occur
1302                 */
1303                if (auto_stat & MSG_OUT_OCCUER) {
1304                        nsp32_msgout_occur(SCpnt);
1305                }
1306
1307                /*
1308                 * Bus Free Occur
1309                 */
1310                if (auto_stat & BUS_FREE_OCCUER) {
1311                        ret = nsp32_busfree_occur(SCpnt, auto_stat);
1312                        if (ret == TRUE) {
1313                                goto out;
1314                        }
1315                }
1316
1317                if (auto_stat & STATUS_PHASE) {
1318                        /*
1319                         * Read CSB and substitute CSB for SCpnt->result
1320                         * to save status phase stutas byte.
1321                         * scsi error handler checks host_byte (DID_*:
1322                         * low level driver to indicate status), then checks 
1323                         * status_byte (SCSI status byte).
1324                         */
1325                        SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN);
1326                }
1327
1328                if (auto_stat & ILLEGAL_PHASE) {
1329                        /* Illegal phase is detected. SACK is not back. */
1330                        nsp32_msg(KERN_WARNING, 
1331                                  "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
1332
1333                        /* TODO: currently we don't have any action... bus reset? */
1334
1335                        /*
1336                         * To send back SACK, assert, wait, and negate.
1337                         */
1338                        nsp32_sack_assert(data);
1339                        nsp32_wait_req(data, NEGATE);
1340                        nsp32_sack_negate(data);
1341
1342                }
1343
1344                if (auto_stat & COMMAND_PHASE) {
1345                        /* nothing to do */
1346                        nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
1347                }
1348
1349                if (auto_stat & AUTOSCSI_BUSY) {
1350                        /* AutoSCSI is running */
1351                }
1352
1353                show_autophase(auto_stat);
1354        }
1355
1356        /* FIFO_SHLD_IRQ */
1357        if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
1358                nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
1359
1360                switch(busphase) {
1361                case BUSPHASE_DATA_OUT:
1362                        nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
1363
1364                        //nsp32_pio_write(SCpnt);
1365
1366                        break;
1367
1368                case BUSPHASE_DATA_IN:
1369                        nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
1370
1371                        //nsp32_pio_read(SCpnt);
1372
1373                        break;
1374
1375                case BUSPHASE_STATUS:
1376                        nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
1377
1378                        SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1379
1380                        break;
1381                default:
1382                        nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
1383                        nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1384                        show_busphase(busphase);
1385                        break;
1386                }
1387
1388                goto out;
1389        }
1390
1391        /* Phase Change IRQ */
1392        if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
1393                nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
1394
1395                switch(busphase) {
1396                case BUSPHASE_MESSAGE_IN:
1397                        nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
1398                        nsp32_msgin_occur(SCpnt, irq_stat, 0);
1399                        break;
1400                default:
1401                        nsp32_msg(KERN_WARNING, "phase chg/other phase?");
1402                        nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
1403                                  irq_stat, trans_stat);
1404                        show_busphase(busphase);
1405                        break;
1406                }
1407                goto out;
1408        }
1409
1410        /* PCI_IRQ */
1411        if (irq_stat & IRQSTATUS_PCI_IRQ) {
1412                nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
1413                /* Do nothing */
1414        }
1415
1416        /* BMCNTERR_IRQ */
1417        if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
1418                nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
1419                /*
1420                 * TODO: To be implemented improving bus master
1421                 * transfer reliability when BMCNTERR is occurred in
1422                 * AutoSCSI phase described in specification.
1423                 */
1424        }
1425
1426#if 0
1427        nsp32_dbg(NSP32_DEBUG_INTR,
1428                  "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1429        show_busphase(busphase);
1430#endif
1431
1432 out:
1433        /* disable IRQ mask */
1434        nsp32_write2(base, IRQ_CONTROL, 0);
1435
1436 out2:
1437        spin_unlock_irqrestore(host->host_lock, flags);
1438
1439        nsp32_dbg(NSP32_DEBUG_INTR, "exit");
1440
1441        return IRQ_RETVAL(handled);
1442}
1443
1444#undef SPRINTF
1445#define SPRINTF(args...) seq_printf(m, ##args)
1446
1447static int nsp32_show_info(struct seq_file *m, struct Scsi_Host *host)
1448{
1449        unsigned long     flags;
1450        nsp32_hw_data    *data;
1451        int               hostno;
1452        unsigned int      base;
1453        unsigned char     mode_reg;
1454        int               id, speed;
1455        long              model;
1456
1457        hostno = host->host_no;
1458        data = (nsp32_hw_data *)host->hostdata;
1459        base = host->io_port;
1460
1461        SPRINTF("NinjaSCSI-32 status\n\n");
1462        SPRINTF("Driver version:        %s, $Revision: 1.33 $\n", nsp32_release_version);
1463        SPRINTF("SCSI host No.:         %d\n",          hostno);
1464        SPRINTF("IRQ:                   %d\n",          host->irq);
1465        SPRINTF("IO:                    0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
1466        SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1);
1467        SPRINTF("sg_tablesize:          %d\n",          host->sg_tablesize);
1468        SPRINTF("Chip revision:         0x%x\n",        (nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
1469
1470        mode_reg = nsp32_index_read1(base, CHIP_MODE);
1471        model    = data->pci_devid->driver_data;
1472
1473#ifdef CONFIG_PM
1474        SPRINTF("Power Management:      %s\n",          (mode_reg & OPTF) ? "yes" : "no");
1475#endif
1476        SPRINTF("OEM:                   %ld, %s\n",     (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
1477
1478        spin_lock_irqsave(&(data->Lock), flags);
1479        SPRINTF("CurrentSC:             0x%p\n\n",      data->CurrentSC);
1480        spin_unlock_irqrestore(&(data->Lock), flags);
1481
1482
1483        SPRINTF("SDTR status\n");
1484        for (id = 0; id < ARRAY_SIZE(data->target); id++) {
1485
1486                SPRINTF("id %d: ", id);
1487
1488                if (id == host->this_id) {
1489                        SPRINTF("----- NinjaSCSI-32 host adapter\n");
1490                        continue;
1491                }
1492
1493                if (data->target[id].sync_flag == SDTR_DONE) {
1494                        if (data->target[id].period == 0            &&
1495                            data->target[id].offset == ASYNC_OFFSET ) {
1496                                SPRINTF("async");
1497                        } else {
1498                                SPRINTF(" sync");
1499                        }
1500                } else {
1501                        SPRINTF(" none");
1502                }
1503
1504                if (data->target[id].period != 0) {
1505
1506                        speed = 1000000 / (data->target[id].period * 4);
1507
1508                        SPRINTF(" transfer %d.%dMB/s, offset %d",
1509                                speed / 1000,
1510                                speed % 1000,
1511                                data->target[id].offset
1512                                );
1513                }
1514                SPRINTF("\n");
1515        }
1516        return 0;
1517}
1518#undef SPRINTF
1519
1520
1521
1522/*
1523 * Reset parameters and call scsi_done for data->cur_lunt.
1524 * Be careful setting SCpnt->result = DID_* before calling this function.
1525 */
1526static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
1527{
1528        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1529        unsigned int   base = SCpnt->device->host->io_port;
1530
1531        scsi_dma_unmap(SCpnt);
1532
1533        /*
1534         * clear TRANSFERCONTROL_BM_START
1535         */
1536        nsp32_write2(base, TRANSFER_CONTROL, 0);
1537        nsp32_write4(base, BM_CNT,           0);
1538
1539        /*
1540         * call scsi_done
1541         */
1542        (*SCpnt->scsi_done)(SCpnt);
1543
1544        /*
1545         * reset parameters
1546         */
1547        data->cur_lunt->SCpnt = NULL;
1548        data->cur_lunt        = NULL;
1549        data->cur_target      = NULL;
1550        data->CurrentSC      = NULL;
1551}
1552
1553
1554/*
1555 * Bus Free Occur
1556 *
1557 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
1558 * with ACK reply when below condition is matched:
1559 *      MsgIn 00: Command Complete.
1560 *      MsgIn 02: Save Data Pointer.
1561 *      MsgIn 04: Diconnect.
1562 * In other case, unexpected BUSFREE is detected.
1563 */
1564static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
1565{
1566        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1567        unsigned int base   = SCpnt->device->host->io_port;
1568
1569        nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
1570        show_autophase(execph);
1571
1572        nsp32_write4(base, BM_CNT,           0);
1573        nsp32_write2(base, TRANSFER_CONTROL, 0);
1574
1575        /*
1576         * MsgIn 02: Save Data Pointer
1577         *
1578         * VALID:
1579         *   Save Data Pointer is received. Adjust pointer.
1580         *   
1581         * NO-VALID:
1582         *   SCSI-3 says if Save Data Pointer is not received, then we restart
1583         *   processing and we can't adjust any SCSI data pointer in next data
1584         *   phase.
1585         */
1586        if (execph & MSGIN_02_VALID) {
1587                nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
1588
1589                /*
1590                 * Check sack_cnt/saved_sack_cnt, then adjust sg table if
1591                 * needed.
1592                 */
1593                if (!(execph & MSGIN_00_VALID) && 
1594                    ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
1595                        unsigned int sacklen, s_sacklen;
1596
1597                        /*
1598                         * Read SACK count and SAVEDSACK count, then compare.
1599                         */
1600                        sacklen   = nsp32_read4(base, SACK_CNT      );
1601                        s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
1602
1603                        /*
1604                         * If SAVEDSACKCNT == 0, it means SavedDataPointer is
1605                         * come after data transferring.
1606                         */
1607                        if (s_sacklen > 0) {
1608                                /*
1609                                 * Comparing between sack and savedsack to
1610                                 * check the condition of AutoMsgIn03.
1611                                 *
1612                                 * If they are same, set msgin03 == TRUE,
1613                                 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
1614                                 * reselection.  On the other hand, if they
1615                                 * aren't same, set msgin03 == FALSE, and
1616                                 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
1617                                 * reselection.
1618                                 */
1619                                if (sacklen != s_sacklen) {
1620                                        data->cur_lunt->msgin03 = FALSE;
1621                                } else {
1622                                        data->cur_lunt->msgin03 = TRUE;
1623                                }
1624
1625                                nsp32_adjust_busfree(SCpnt, s_sacklen);
1626                        }
1627                }
1628
1629                /* This value has not substitude with valid value yet... */
1630                //data->cur_lunt->save_datp = data->cur_datp;
1631        } else {
1632                /*
1633                 * no processing.
1634                 */
1635        }
1636        
1637        if (execph & MSGIN_03_VALID) {
1638                /* MsgIn03 was valid to be processed. No need processing. */
1639        }
1640
1641        /*
1642         * target SDTR check
1643         */
1644        if (data->cur_target->sync_flag & SDTR_INITIATOR) {
1645                /*
1646                 * SDTR negotiation pulled by the initiator has not
1647                 * finished yet. Fall back to ASYNC mode.
1648                 */
1649                nsp32_set_async(data, data->cur_target);
1650                data->cur_target->sync_flag &= ~SDTR_INITIATOR;
1651                data->cur_target->sync_flag |= SDTR_DONE;
1652        } else if (data->cur_target->sync_flag & SDTR_TARGET) {
1653                /*
1654                 * SDTR negotiation pulled by the target has been
1655                 * negotiating.
1656                 */
1657                if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
1658                        /* 
1659                         * If valid message is received, then
1660                         * negotiation is succeeded.
1661                         */
1662                } else {
1663                        /*
1664                         * On the contrary, if unexpected bus free is
1665                         * occurred, then negotiation is failed. Fall
1666                         * back to ASYNC mode.
1667                         */
1668                        nsp32_set_async(data, data->cur_target);
1669                }
1670                data->cur_target->sync_flag &= ~SDTR_TARGET;
1671                data->cur_target->sync_flag |= SDTR_DONE;
1672        }
1673
1674        /*
1675         * It is always ensured by SCSI standard that initiator
1676         * switches into Bus Free Phase after
1677         * receiving message 00 (Command Complete), 04 (Disconnect).
1678         * It's the reason that processing here is valid.
1679         */
1680        if (execph & MSGIN_00_VALID) {
1681                /* MsgIn 00: Command Complete */
1682                nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
1683
1684                SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
1685                SCpnt->SCp.Message = 0;
1686                nsp32_dbg(NSP32_DEBUG_BUSFREE, 
1687                          "normal end stat=0x%x resid=0x%x\n",
1688                          SCpnt->SCp.Status, scsi_get_resid(SCpnt));
1689                SCpnt->result = (DID_OK             << 16) |
1690                                (SCpnt->SCp.Message <<  8) |
1691                                (SCpnt->SCp.Status  <<  0);
1692                nsp32_scsi_done(SCpnt);
1693                /* All operation is done */
1694                return TRUE;
1695        } else if (execph & MSGIN_04_VALID) {
1696                /* MsgIn 04: Disconnect */
1697                SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
1698                SCpnt->SCp.Message = 4;
1699                
1700                nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
1701                return TRUE;
1702        } else {
1703                /* Unexpected bus free */
1704                nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
1705
1706                /* DID_ERROR? */
1707                //SCpnt->result   = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
1708                SCpnt->result = DID_ERROR << 16;
1709                nsp32_scsi_done(SCpnt);
1710                return TRUE;
1711        }
1712        return FALSE;
1713}
1714
1715
1716/*
1717 * nsp32_adjust_busfree - adjusting SG table
1718 *
1719 * Note: This driver adjust the SG table using SCSI ACK
1720 *       counter instead of BMCNT counter!
1721 */
1722static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
1723{
1724        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1725        int                   old_entry = data->cur_entry;
1726        int                   new_entry;
1727        int                   sg_num = data->cur_lunt->sg_num;
1728        nsp32_sgtable *sgt    = data->cur_lunt->sglun->sgt;
1729        unsigned int          restlen, sentlen;
1730        u32_le                len, addr;
1731
1732        nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt));
1733
1734        /* adjust saved SACK count with 4 byte start address boundary */
1735        s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
1736
1737        /*
1738         * calculate new_entry from sack count and each sgt[].len 
1739         * calculate the byte which is intent to send
1740         */
1741        sentlen = 0;
1742        for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
1743                sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
1744                if (sentlen > s_sacklen) {
1745                        break;
1746                }
1747        }
1748
1749        /* all sgt is processed */
1750        if (new_entry == sg_num) {
1751                goto last;
1752        }
1753
1754        if (sentlen == s_sacklen) {
1755                /* XXX: confirm it's ok or not */
1756                /* In this case, it's ok because we are at 
1757                   the head element of the sg. restlen is correctly calculated. */
1758        }
1759
1760        /* calculate the rest length for transferring */
1761        restlen = sentlen - s_sacklen;
1762
1763        /* update adjusting current SG table entry */
1764        len  = le32_to_cpu(sgt[new_entry].len);
1765        addr = le32_to_cpu(sgt[new_entry].addr);
1766        addr += (len - restlen);
1767        sgt[new_entry].addr = cpu_to_le32(addr);
1768        sgt[new_entry].len  = cpu_to_le32(restlen);
1769
1770        /* set cur_entry with new_entry */
1771        data->cur_entry = new_entry;
1772 
1773        return;
1774
1775 last:
1776        if (scsi_get_resid(SCpnt) < sentlen) {
1777                nsp32_msg(KERN_ERR, "resid underflow");
1778        }
1779
1780        scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen);
1781        nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt));
1782
1783        /* update hostdata and lun */
1784
1785        return;
1786}
1787
1788
1789/*
1790 * It's called MsgOut phase occur.
1791 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
1792 * message out phase. It, however, has more than 3 messages,
1793 * HBA creates the interrupt and we have to process by hand.
1794 */
1795static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
1796{
1797        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1798        unsigned int base   = SCpnt->device->host->io_port;
1799        //unsigned short command;
1800        long new_sgtp;
1801        int i;
1802        
1803        nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1804                  "enter: msgout_len: 0x%x", data->msgout_len);
1805
1806        /*
1807         * If MsgOut phase is occurred without having any
1808         * message, then No_Operation is sent (SCSI-2).
1809         */
1810        if (data->msgout_len == 0) {
1811                nsp32_build_nop(SCpnt);
1812        }
1813
1814        /*
1815         * Set SGTP ADDR current entry for restarting AUTOSCSI, 
1816         * because SGTP is incremented next point.
1817         * There is few statement in the specification...
1818         */
1819        new_sgtp = data->cur_lunt->sglun_paddr + 
1820                   (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
1821
1822        /*
1823         * send messages
1824         */
1825        for (i = 0; i < data->msgout_len; i++) {
1826                nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1827                          "%d : 0x%x", i, data->msgoutbuf[i]);
1828
1829                /*
1830                 * Check REQ is asserted.
1831                 */
1832                nsp32_wait_req(data, ASSERT);
1833
1834                if (i == (data->msgout_len - 1)) {
1835                        /*
1836                         * If the last message, set the AutoSCSI restart
1837                         * before send back the ack message. AutoSCSI
1838                         * restart automatically negate ATN signal.
1839                         */
1840                        //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
1841                        //nsp32_restart_autoscsi(SCpnt, command);
1842                        nsp32_write2(base, COMMAND_CONTROL,
1843                                         (CLEAR_CDB_FIFO_POINTER |
1844                                          AUTO_COMMAND_PHASE     |
1845                                          AUTOSCSI_RESTART       |
1846                                          AUTO_MSGIN_00_OR_04    |
1847                                          AUTO_MSGIN_02          ));
1848                }
1849                /*
1850                 * Write data with SACK, then wait sack is
1851                 * automatically negated.
1852                 */
1853                nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
1854                nsp32_wait_sack(data, NEGATE);
1855
1856                nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
1857                          nsp32_read1(base, SCSI_BUS_MONITOR));
1858        };
1859
1860        data->msgout_len = 0;
1861
1862        nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
1863}
1864
1865/*
1866 * Restart AutoSCSI
1867 *
1868 * Note: Restarting AutoSCSI needs set:
1869 *              SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
1870 */
1871static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
1872{
1873        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1874        unsigned int   base = data->BaseAddress;
1875        unsigned short transfer = 0;
1876
1877        nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
1878
1879        if (data->cur_target == NULL || data->cur_lunt == NULL) {
1880                nsp32_msg(KERN_ERR, "Target or Lun is invalid");
1881        }
1882
1883        /*
1884         * set SYNC_REG
1885         * Don't set BM_START_ADR before setting this register.
1886         */
1887        nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
1888
1889        /*
1890         * set ACKWIDTH
1891         */
1892        nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
1893
1894        /*
1895         * set SREQ hazard killer sampling rate
1896         */
1897        nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
1898
1899        /*
1900         * set SGT ADDR (physical address)
1901         */
1902        nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
1903
1904        /*
1905         * set TRANSFER CONTROL REG
1906         */
1907        transfer = 0;
1908        transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
1909        if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
1910                if (scsi_bufflen(SCpnt) > 0) {
1911                        transfer |= BM_START;
1912                }
1913        } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
1914                transfer |= CB_MMIO_MODE;
1915        } else if (data->trans_method & NSP32_TRANSFER_PIO) {
1916                transfer |= CB_IO_MODE;
1917        }
1918        nsp32_write2(base, TRANSFER_CONTROL, transfer);
1919
1920        /*
1921         * restart AutoSCSI
1922         *
1923         * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
1924         */
1925        command |= (CLEAR_CDB_FIFO_POINTER |
1926                    AUTO_COMMAND_PHASE     |
1927                    AUTOSCSI_RESTART       );
1928        nsp32_write2(base, COMMAND_CONTROL, command);
1929
1930        nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
1931}
1932
1933
1934/*
1935 * cannot run automatically message in occur
1936 */
1937static void nsp32_msgin_occur(struct scsi_cmnd     *SCpnt,
1938                              unsigned long  irq_status,
1939                              unsigned short execph)
1940{
1941        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1942        unsigned int   base = SCpnt->device->host->io_port;
1943        unsigned char  msg;
1944        unsigned char  msgtype;
1945        unsigned char  newlun;
1946        unsigned short command  = 0;
1947        int            msgclear = TRUE;
1948        long           new_sgtp;
1949        int            ret;
1950
1951        /*
1952         * read first message
1953         *    Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
1954         *    of Message-In have to be processed before sending back SCSI ACK.
1955         */
1956        msg = nsp32_read1(base, SCSI_DATA_IN);
1957        data->msginbuf[(unsigned char)data->msgin_len] = msg;
1958        msgtype = data->msginbuf[0];
1959        nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
1960                  "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
1961                  data->msgin_len, msg, msgtype);
1962
1963        /*
1964         * TODO: We need checking whether bus phase is message in?
1965         */
1966
1967        /*
1968         * assert SCSI ACK
1969         */
1970        nsp32_sack_assert(data);
1971
1972        /*
1973         * processing IDENTIFY
1974         */
1975        if (msgtype & 0x80) {
1976                if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
1977                        /* Invalid (non reselect) phase */
1978                        goto reject;
1979                }
1980
1981                newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
1982                ret = nsp32_reselection(SCpnt, newlun);
1983                if (ret == TRUE) {
1984                        goto restart;
1985                } else {
1986                        goto reject;
1987                }
1988        }
1989        
1990        /*
1991         * processing messages except for IDENTIFY
1992         *
1993         * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
1994         */
1995        switch (msgtype) {
1996        /*
1997         * 1-byte message
1998         */
1999        case COMMAND_COMPLETE:
2000        case DISCONNECT:
2001                /*
2002                 * These messages should not be occurred.
2003                 * They should be processed on AutoSCSI sequencer.
2004                 */
2005                nsp32_msg(KERN_WARNING, 
2006                           "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
2007                break;
2008                
2009        case RESTORE_POINTERS:
2010                /*
2011                 * AutoMsgIn03 is disabled, and HBA gets this message.
2012                 */
2013
2014                if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
2015                        unsigned int s_sacklen;
2016
2017                        s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
2018                        if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
2019                                nsp32_adjust_busfree(SCpnt, s_sacklen);
2020                        } else {
2021                                /* No need to rewrite SGT */
2022                        }
2023                }
2024                data->cur_lunt->msgin03 = FALSE;
2025
2026                /* Update with the new value */
2027
2028                /* reset SACK/SavedACK counter (or ALL clear?) */
2029                nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
2030
2031                /*
2032                 * set new sg pointer
2033                 */
2034                new_sgtp = data->cur_lunt->sglun_paddr + 
2035                        (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
2036                nsp32_write4(base, SGT_ADR, new_sgtp);
2037
2038                break;
2039
2040        case SAVE_POINTERS:
2041                /*
2042                 * These messages should not be occurred.
2043                 * They should be processed on AutoSCSI sequencer.
2044                 */
2045                nsp32_msg (KERN_WARNING, 
2046                           "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
2047                
2048                break;
2049                
2050        case MESSAGE_REJECT:
2051                /* If previous message_out is sending SDTR, and get 
2052                   message_reject from target, SDTR negotiation is failed */
2053                if (data->cur_target->sync_flag &
2054                                (SDTR_INITIATOR | SDTR_TARGET)) {
2055                        /*
2056                         * Current target is negotiating SDTR, but it's
2057                         * failed.  Fall back to async transfer mode, and set
2058                         * SDTR_DONE.
2059                         */
2060                        nsp32_set_async(data, data->cur_target);
2061                        data->cur_target->sync_flag &= ~SDTR_INITIATOR;
2062                        data->cur_target->sync_flag |= SDTR_DONE;
2063
2064                }
2065                break;
2066
2067        case LINKED_CMD_COMPLETE:
2068        case LINKED_FLG_CMD_COMPLETE:
2069                /* queue tag is not supported currently */
2070                nsp32_msg (KERN_WARNING, 
2071                           "unsupported message: 0x%x", msgtype);
2072                break;
2073
2074        case INITIATE_RECOVERY:
2075                /* staring ECA (Extended Contingent Allegiance) state. */
2076                /* This message is declined in SPI2 or later. */
2077
2078                goto reject;
2079
2080        /*
2081         * 2-byte message
2082         */
2083        case SIMPLE_QUEUE_TAG:
2084        case 0x23:
2085                /*
2086                 * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
2087                 * No support is needed.
2088                 */
2089                if (data->msgin_len >= 1) {
2090                        goto reject;
2091                }
2092
2093                /* current position is 1-byte of 2 byte */
2094                msgclear = FALSE;
2095
2096                break;
2097
2098        /*
2099         * extended message
2100         */
2101        case EXTENDED_MESSAGE:
2102                if (data->msgin_len < 1) {
2103                        /*
2104                         * Current position does not reach 2-byte
2105                         * (2-byte is extended message length).
2106                         */
2107                        msgclear = FALSE;
2108                        break;
2109                }
2110
2111                if ((data->msginbuf[1] + 1) > data->msgin_len) {
2112                        /*
2113                         * Current extended message has msginbuf[1] + 2
2114                         * (msgin_len starts counting from 0, so buf[1] + 1).
2115                         * If current message position is not finished,
2116                         * continue receiving message.
2117                         */
2118                        msgclear = FALSE;
2119                        break;
2120                }
2121
2122                /*
2123                 * Reach here means regular length of each type of 
2124                 * extended messages.
2125                 */
2126                switch (data->msginbuf[2]) {
2127                case EXTENDED_MODIFY_DATA_POINTER:
2128                        /* TODO */
2129                        goto reject; /* not implemented yet */
2130                        break;
2131
2132                case EXTENDED_SDTR:
2133                        /*
2134                         * Exchange this message between initiator and target.
2135                         */
2136                        if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
2137                                /*
2138                                 * received inappropriate message.
2139                                 */
2140                                goto reject;
2141                                break;
2142                        }
2143
2144                        nsp32_analyze_sdtr(SCpnt);
2145
2146                        break;
2147
2148                case EXTENDED_EXTENDED_IDENTIFY:
2149                        /* SCSI-I only, not supported. */
2150                        goto reject; /* not implemented yet */
2151
2152                        break;
2153
2154                case EXTENDED_WDTR:
2155                        goto reject; /* not implemented yet */
2156
2157                        break;
2158                        
2159                default:
2160                        goto reject;
2161                }
2162                break;
2163                
2164        default:
2165                goto reject;
2166        }
2167
2168 restart:
2169        if (msgclear == TRUE) {
2170                data->msgin_len = 0;
2171
2172                /*
2173                 * If restarting AutoSCSI, but there are some message to out
2174                 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
2175                 * (MV_VALID = 0). When commandcontrol is written with
2176                 * AutoSCSI restart, at the same time MsgOutOccur should be
2177                 * happened (however, such situation is really possible...?).
2178                 */
2179                if (data->msgout_len > 0) {     
2180                        nsp32_write4(base, SCSI_MSG_OUT, 0);
2181                        command |= AUTO_ATN;
2182                }
2183
2184                /*
2185                 * restart AutoSCSI
2186                 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
2187                 */
2188                command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
2189
2190                /*
2191                 * If current msgin03 is TRUE, then flag on.
2192                 */
2193                if (data->cur_lunt->msgin03 == TRUE) {
2194                        command |= AUTO_MSGIN_03;
2195                }
2196                data->cur_lunt->msgin03 = FALSE;
2197        } else {
2198                data->msgin_len++;
2199        }
2200
2201        /*
2202         * restart AutoSCSI
2203         */
2204        nsp32_restart_autoscsi(SCpnt, command);
2205
2206        /*
2207         * wait SCSI REQ negate for REQ-ACK handshake
2208         */
2209        nsp32_wait_req(data, NEGATE);
2210
2211        /*
2212         * negate SCSI ACK
2213         */
2214        nsp32_sack_negate(data);
2215
2216        nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2217
2218        return;
2219
2220 reject:
2221        nsp32_msg(KERN_WARNING, 
2222                  "invalid or unsupported MessageIn, rejected. "
2223                  "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
2224                  msg, data->msgin_len, msgtype);
2225        nsp32_build_reject(SCpnt);
2226        data->msgin_len = 0;
2227
2228        goto restart;
2229}
2230
2231/*
2232 * 
2233 */
2234static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
2235{
2236        nsp32_hw_data   *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2237        nsp32_target     *target     = data->cur_target;
2238        nsp32_sync_table *synct;
2239        unsigned char     get_period = data->msginbuf[3];
2240        unsigned char     get_offset = data->msginbuf[4];
2241        int               entry;
2242        int               syncnum;
2243
2244        nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
2245
2246        synct   = data->synct;
2247        syncnum = data->syncnum;
2248
2249        /*
2250         * If this inititor sent the SDTR message, then target responds SDTR,
2251         * initiator SYNCREG, ACKWIDTH from SDTR parameter.
2252         * Messages are not appropriate, then send back reject message.
2253         * If initiator did not send the SDTR, but target sends SDTR, 
2254         * initiator calculator the appropriate parameter and send back SDTR.
2255         */     
2256        if (target->sync_flag & SDTR_INITIATOR) {
2257                /*
2258                 * Initiator sent SDTR, the target responds and
2259                 * send back negotiation SDTR.
2260                 */
2261                nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
2262        
2263                target->sync_flag &= ~SDTR_INITIATOR;
2264                target->sync_flag |= SDTR_DONE;
2265
2266                /*
2267                 * offset:
2268                 */
2269                if (get_offset > SYNC_OFFSET) {
2270                        /*
2271                         * Negotiation is failed, the target send back
2272                         * unexpected offset value.
2273                         */
2274                        goto reject;
2275                }
2276                
2277                if (get_offset == ASYNC_OFFSET) {
2278                        /*
2279                         * Negotiation is succeeded, the target want
2280                         * to fall back into asynchronous transfer mode.
2281                         */
2282                        goto async;
2283                }
2284
2285                /*
2286                 * period:
2287                 *    Check whether sync period is too short. If too short,
2288                 *    fall back to async mode. If it's ok, then investigate
2289                 *    the received sync period. If sync period is acceptable
2290                 *    between sync table start_period and end_period, then
2291                 *    set this I_T nexus as sent offset and period.
2292                 *    If it's not acceptable, send back reject and fall back
2293                 *    to async mode.
2294                 */
2295                if (get_period < data->synct[0].period_num) {
2296                        /*
2297                         * Negotiation is failed, the target send back
2298                         * unexpected period value.
2299                         */
2300                        goto reject;
2301                }
2302
2303                entry = nsp32_search_period_entry(data, target, get_period);
2304
2305                if (entry < 0) {
2306                        /*
2307                         * Target want to use long period which is not 
2308                         * acceptable NinjaSCSI-32Bi/UDE.
2309                         */
2310                        goto reject;
2311                }
2312
2313                /*
2314                 * Set new sync table and offset in this I_T nexus.
2315                 */
2316                nsp32_set_sync_entry(data, target, entry, get_offset);
2317        } else {
2318                /* Target send SDTR to initiator. */
2319                nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
2320        
2321                target->sync_flag |= SDTR_INITIATOR;
2322
2323                /* offset: */
2324                if (get_offset > SYNC_OFFSET) {
2325                        /* send back as SYNC_OFFSET */
2326                        get_offset = SYNC_OFFSET;
2327                }
2328
2329                /* period: */
2330                if (get_period < data->synct[0].period_num) {
2331                        get_period = data->synct[0].period_num;
2332                }
2333
2334                entry = nsp32_search_period_entry(data, target, get_period);
2335
2336                if (get_offset == ASYNC_OFFSET || entry < 0) {
2337                        nsp32_set_async(data, target);
2338                        nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
2339                } else {
2340                        nsp32_set_sync_entry(data, target, entry, get_offset);
2341                        nsp32_build_sdtr(SCpnt, get_period, get_offset);
2342                }
2343        }
2344
2345        target->period = get_period;
2346        nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2347        return;
2348
2349 reject:
2350        /*
2351         * If the current message is unacceptable, send back to the target
2352         * with reject message.
2353         */
2354        nsp32_build_reject(SCpnt);
2355
2356 async:
2357        nsp32_set_async(data, target);  /* set as ASYNC transfer mode */
2358
2359        target->period = 0;
2360        nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
2361        return;
2362}
2363
2364
2365/*
2366 * Search config entry number matched in sync_table from given
2367 * target and speed period value. If failed to search, return negative value.
2368 */
2369static int nsp32_search_period_entry(nsp32_hw_data *data,
2370                                     nsp32_target  *target,
2371                                     unsigned char  period)
2372{
2373        int i;
2374
2375        if (target->limit_entry >= data->syncnum) {
2376                nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
2377                target->limit_entry = 0;
2378        }
2379
2380        for (i = target->limit_entry; i < data->syncnum; i++) {
2381                if (period >= data->synct[i].start_period &&
2382                    period <= data->synct[i].end_period) {
2383                                break;
2384                }
2385        }
2386
2387        /*
2388         * Check given period value is over the sync_table value.
2389         * If so, return max value.
2390         */
2391        if (i == data->syncnum) {
2392                i = -1;
2393        }
2394
2395        return i;
2396}
2397
2398
2399/*
2400 * target <-> initiator use ASYNC transfer
2401 */
2402static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
2403{
2404        unsigned char period = data->synct[target->limit_entry].period_num;
2405
2406        target->offset     = ASYNC_OFFSET;
2407        target->period     = 0;
2408        target->syncreg    = TO_SYNCREG(period, ASYNC_OFFSET);
2409        target->ackwidth   = 0;
2410        target->sample_reg = 0;
2411
2412        nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
2413}
2414
2415
2416/*
2417 * target <-> initiator use maximum SYNC transfer
2418 */
2419static void nsp32_set_max_sync(nsp32_hw_data *data,
2420                               nsp32_target  *target,
2421                               unsigned char *period,
2422                               unsigned char *offset)
2423{
2424        unsigned char period_num, ackwidth;
2425
2426        period_num = data->synct[target->limit_entry].period_num;
2427        *period    = data->synct[target->limit_entry].start_period;
2428        ackwidth   = data->synct[target->limit_entry].ackwidth;
2429        *offset    = SYNC_OFFSET;
2430
2431        target->syncreg    = TO_SYNCREG(period_num, *offset);
2432        target->ackwidth   = ackwidth;
2433        target->offset     = *offset;
2434        target->sample_reg = 0;       /* disable SREQ sampling */
2435}
2436
2437
2438/*
2439 * target <-> initiator use entry number speed
2440 */
2441static void nsp32_set_sync_entry(nsp32_hw_data *data,
2442                                 nsp32_target  *target,
2443                                 int            entry,
2444                                 unsigned char  offset)
2445{
2446        unsigned char period, ackwidth, sample_rate;
2447
2448        period      = data->synct[entry].period_num;
2449        ackwidth    = data->synct[entry].ackwidth;
2450        offset      = offset;
2451        sample_rate = data->synct[entry].sample_rate;
2452
2453        target->syncreg    = TO_SYNCREG(period, offset);
2454        target->ackwidth   = ackwidth;
2455        target->offset     = offset;
2456        target->sample_reg = sample_rate | SAMPLING_ENABLE;
2457
2458        nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
2459}
2460
2461
2462/*
2463 * It waits until SCSI REQ becomes assertion or negation state.
2464 *
2465 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
2466 *     connected target responds SCSI REQ negation.  We have to wait
2467 *     SCSI REQ becomes negation in order to negate SCSI ACK signal for
2468 *     REQ-ACK handshake.
2469 */
2470static void nsp32_wait_req(nsp32_hw_data *data, int state)
2471{
2472        unsigned int  base      = data->BaseAddress;
2473        int           wait_time = 0;
2474        unsigned char bus, req_bit;
2475
2476        if (!((state == ASSERT) || (state == NEGATE))) {
2477                nsp32_msg(KERN_ERR, "unknown state designation");
2478        }
2479        /* REQ is BIT(5) */
2480        req_bit = (state == ASSERT ? BUSMON_REQ : 0);
2481
2482        do {
2483                bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2484                if ((bus & BUSMON_REQ) == req_bit) {
2485                        nsp32_dbg(NSP32_DEBUG_WAIT, 
2486                                  "wait_time: %d", wait_time);
2487                        return;
2488                }
2489                udelay(1);
2490                wait_time++;
2491        } while (wait_time < REQSACK_TIMEOUT_TIME);
2492
2493        nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
2494}
2495
2496/*
2497 * It waits until SCSI SACK becomes assertion or negation state.
2498 */
2499static void nsp32_wait_sack(nsp32_hw_data *data, int state)
2500{
2501        unsigned int  base      = data->BaseAddress;
2502        int           wait_time = 0;
2503        unsigned char bus, ack_bit;
2504
2505        if (!((state == ASSERT) || (state == NEGATE))) {
2506                nsp32_msg(KERN_ERR, "unknown state designation");
2507        }
2508        /* ACK is BIT(4) */
2509        ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
2510
2511        do {
2512                bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2513                if ((bus & BUSMON_ACK) == ack_bit) {
2514                        nsp32_dbg(NSP32_DEBUG_WAIT,
2515                                  "wait_time: %d", wait_time);
2516                        return;
2517                }
2518                udelay(1);
2519                wait_time++;
2520        } while (wait_time < REQSACK_TIMEOUT_TIME);
2521
2522        nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
2523}
2524
2525/*
2526 * assert SCSI ACK
2527 *
2528 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
2529 */
2530static void nsp32_sack_assert(nsp32_hw_data *data)
2531{
2532        unsigned int  base = data->BaseAddress;
2533        unsigned char busctrl;
2534
2535        busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
2536        busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
2537        nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2538}
2539
2540/*
2541 * negate SCSI ACK
2542 */
2543static void nsp32_sack_negate(nsp32_hw_data *data)
2544{
2545        unsigned int  base = data->BaseAddress;
2546        unsigned char busctrl;
2547
2548        busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
2549        busctrl &= ~BUSCTL_ACK;
2550        nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2551}
2552
2553
2554
2555/*
2556 * Note: n_io_port is defined as 0x7f because I/O register port is
2557 *       assigned as:
2558 *      0x800-0x8ff: memory mapped I/O port
2559 *      0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
2560 *      0xc00-0xfff: CardBus status registers
2561 */
2562static int nsp32_detect(struct pci_dev *pdev)
2563{
2564        struct Scsi_Host *host; /* registered host structure */
2565        struct resource  *res;
2566        nsp32_hw_data    *data;
2567        int               ret;
2568        int               i, j;
2569
2570        nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
2571
2572        /*
2573         * register this HBA as SCSI device
2574         */
2575        host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
2576        if (host == NULL) {
2577                nsp32_msg (KERN_ERR, "failed to scsi register");
2578                goto err;
2579        }
2580
2581        /*
2582         * set nsp32_hw_data
2583         */
2584        data = (nsp32_hw_data *)host->hostdata;
2585
2586        memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
2587
2588        host->irq       = data->IrqNumber;
2589        host->io_port   = data->BaseAddress;
2590        host->unique_id = data->BaseAddress;
2591        host->n_io_port = data->NumAddress;
2592        host->base      = (unsigned long)data->MmioAddress;
2593
2594        data->Host      = host;
2595        spin_lock_init(&(data->Lock));
2596
2597        data->cur_lunt   = NULL;
2598        data->cur_target = NULL;
2599
2600        /*
2601         * Bus master transfer mode is supported currently.
2602         */
2603        data->trans_method = NSP32_TRANSFER_BUSMASTER;
2604
2605        /*
2606         * Set clock div, CLOCK_4 (HBA has own external clock, and
2607         * dividing * 100ns/4).
2608         * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
2609         */
2610        data->clock = CLOCK_4;
2611
2612        /*
2613         * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
2614         */
2615        switch (data->clock) {
2616        case CLOCK_4:
2617                /* If data->clock is CLOCK_4, then select 40M sync table. */
2618                data->synct   = nsp32_sync_table_40M;
2619                data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2620                break;
2621        case CLOCK_2:
2622                /* If data->clock is CLOCK_2, then select 20M sync table. */
2623                data->synct   = nsp32_sync_table_20M;
2624                data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
2625                break;
2626        case PCICLK:
2627                /* If data->clock is PCICLK, then select pci sync table. */
2628                data->synct   = nsp32_sync_table_pci;
2629                data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
2630                break;
2631        default:
2632                nsp32_msg(KERN_WARNING,
2633                          "Invalid clock div is selected, set CLOCK_4.");
2634                /* Use default value CLOCK_4 */
2635                data->clock   = CLOCK_4;
2636                data->synct   = nsp32_sync_table_40M;
2637                data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2638        }
2639
2640        /*
2641         * setup nsp32_lunt
2642         */
2643
2644        /*
2645         * setup DMA 
2646         */
2647        if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
2648                nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
2649                goto scsi_unregister;
2650        }
2651
2652        /*
2653         * allocate autoparam DMA resource.
2654         */
2655        data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr));
2656        if (data->autoparam == NULL) {
2657                nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2658                goto scsi_unregister;
2659        }
2660
2661        /*
2662         * allocate scatter-gather DMA resource.
2663         */
2664        data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE,
2665                                             &(data->sg_paddr));
2666        if (data->sg_list == NULL) {
2667                nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2668                goto free_autoparam;
2669        }
2670
2671        for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
2672                for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
2673                        int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
2674                        nsp32_lunt tmp = {
2675                                .SCpnt       = NULL,
2676                                .save_datp   = 0,
2677                                .msgin03     = FALSE,
2678                                .sg_num      = 0,
2679                                .cur_entry   = 0,
2680                                .sglun       = &(data->sg_list[offset]),
2681                                .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
2682                        };
2683
2684                        data->lunt[i][j] = tmp;
2685                }
2686        }
2687
2688        /*
2689         * setup target
2690         */
2691        for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2692                nsp32_target *target = &(data->target[i]);
2693
2694                target->limit_entry  = 0;
2695                target->sync_flag    = 0;
2696                nsp32_set_async(data, target);
2697        }
2698
2699        /*
2700         * EEPROM check
2701         */
2702        ret = nsp32_getprom_param(data);
2703        if (ret == FALSE) {
2704                data->resettime = 3;    /* default 3 */
2705        }
2706
2707        /*
2708         * setup HBA
2709         */
2710        nsp32hw_init(data);
2711
2712        snprintf(data->info_str, sizeof(data->info_str),
2713                 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
2714                 host->irq, host->io_port, host->n_io_port);
2715
2716        /*
2717         * SCSI bus reset
2718         *
2719         * Note: It's important to reset SCSI bus in initialization phase.
2720         *     NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
2721         *     system is coming up, so SCSI devices connected to HBA is set as
2722         *     un-asynchronous mode.  It brings the merit that this HBA is
2723         *     ready to start synchronous transfer without any preparation,
2724         *     but we are difficult to control transfer speed.  In addition,
2725         *     it prevents device transfer speed from effecting EEPROM start-up
2726         *     SDTR.  NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
2727         *     Auto Mode, then FAST-10M is selected when SCSI devices are
2728         *     connected same or more than 4 devices.  It should be avoided
2729         *     depending on this specification. Thus, resetting the SCSI bus
2730         *     restores all connected SCSI devices to asynchronous mode, then
2731         *     this driver set SDTR safely later, and we can control all SCSI
2732         *     device transfer mode.
2733         */
2734        nsp32_do_bus_reset(data);
2735
2736        ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data);
2737        if (ret < 0) {
2738                nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
2739                          "SCSI PCI controller. Interrupt: %d", host->irq);
2740                goto free_sg_list;
2741        }
2742
2743        /*
2744         * PCI IO register
2745         */
2746        res = request_region(host->io_port, host->n_io_port, "nsp32");
2747        if (res == NULL) {
2748                nsp32_msg(KERN_ERR, 
2749                          "I/O region 0x%lx+0x%lx is already used",
2750                          data->BaseAddress, data->NumAddress);
2751                goto free_irq;
2752        }
2753
2754        ret = scsi_add_host(host, &pdev->dev);
2755        if (ret) {
2756                nsp32_msg(KERN_ERR, "failed to add scsi host");
2757                goto free_region;
2758        }
2759        scsi_scan_host(host);
2760        pci_set_drvdata(pdev, host);
2761        return 0;
2762
2763 free_region:
2764        release_region(host->io_port, host->n_io_port);
2765
2766 free_irq:
2767        free_irq(host->irq, data);
2768
2769 free_sg_list:
2770        pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE,
2771                            data->sg_list, data->sg_paddr);
2772
2773 free_autoparam:
2774        pci_free_consistent(pdev, sizeof(nsp32_autoparam),
2775                            data->autoparam, data->auto_paddr);
2776        
2777 scsi_unregister:
2778        scsi_host_put(host);
2779
2780 err:
2781        return 1;
2782}
2783
2784static int nsp32_release(struct Scsi_Host *host)
2785{
2786        nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
2787
2788        if (data->autoparam) {
2789                pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
2790                                    data->autoparam, data->auto_paddr);
2791        }
2792
2793        if (data->sg_list) {
2794                pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
2795                                    data->sg_list, data->sg_paddr);
2796        }
2797
2798        if (host->irq) {
2799                free_irq(host->irq, data);
2800        }
2801
2802        if (host->io_port && host->n_io_port) {
2803                release_region(host->io_port, host->n_io_port);
2804        }
2805
2806        if (data->MmioAddress) {
2807                iounmap(data->MmioAddress);
2808        }
2809
2810        return 0;
2811}
2812
2813static const char *nsp32_info(struct Scsi_Host *shpnt)
2814{
2815        nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
2816
2817        return data->info_str;
2818}
2819
2820
2821/****************************************************************************
2822 * error handler
2823 */
2824static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
2825{
2826        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2827        unsigned int   base = SCpnt->device->host->io_port;
2828
2829        nsp32_msg(KERN_WARNING, "abort");
2830
2831        if (data->cur_lunt->SCpnt == NULL) {
2832                nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
2833                return FAILED;
2834        }
2835
2836        if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
2837                /* reset SDTR negotiation */
2838                data->cur_target->sync_flag = 0;
2839                nsp32_set_async(data, data->cur_target);
2840        }
2841
2842        nsp32_write2(base, TRANSFER_CONTROL, 0);
2843        nsp32_write2(base, BM_CNT,           0);
2844
2845        SCpnt->result = DID_ABORT << 16;
2846        nsp32_scsi_done(SCpnt);
2847
2848        nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
2849        return SUCCESS;
2850}
2851
2852static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
2853{
2854        nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2855        unsigned int   base = SCpnt->device->host->io_port;
2856
2857        spin_lock_irq(SCpnt->device->host->host_lock);
2858
2859        nsp32_msg(KERN_INFO, "Bus Reset");      
2860        nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2861
2862        nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2863        nsp32_do_bus_reset(data);
2864        nsp32_write2(base, IRQ_CONTROL, 0);
2865
2866        spin_unlock_irq(SCpnt->device->host->host_lock);
2867        return SUCCESS; /* SCSI bus reset is succeeded at any time. */
2868}
2869
2870static void nsp32_do_bus_reset(nsp32_hw_data *data)
2871{
2872        unsigned int   base = data->BaseAddress;
2873        unsigned short intrdat;
2874        int i;
2875
2876        nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
2877
2878        /*
2879         * stop all transfer
2880         * clear TRANSFERCONTROL_BM_START
2881         * clear counter
2882         */
2883        nsp32_write2(base, TRANSFER_CONTROL, 0);
2884        nsp32_write4(base, BM_CNT,           0);
2885        nsp32_write4(base, CLR_COUNTER,      CLRCOUNTER_ALLMASK);
2886
2887        /*
2888         * fall back to asynchronous transfer mode
2889         * initialize SDTR negotiation flag
2890         */
2891        for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2892                nsp32_target *target = &data->target[i];
2893
2894                target->sync_flag = 0;
2895                nsp32_set_async(data, target);
2896        }
2897
2898        /*
2899         * reset SCSI bus
2900         */
2901        nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
2902        udelay(RESET_HOLD_TIME);
2903        nsp32_write1(base, SCSI_BUS_CONTROL, 0);
2904        for(i = 0; i < 5; i++) {
2905                intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
2906                nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
2907        }
2908
2909        data->CurrentSC = NULL;
2910}
2911
2912static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
2913{
2914        struct Scsi_Host *host = SCpnt->device->host;
2915        unsigned int      base = SCpnt->device->host->io_port;
2916        nsp32_hw_data    *data = (nsp32_hw_data *)host->hostdata;
2917
2918        nsp32_msg(KERN_INFO, "Host Reset");     
2919        nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2920
2921        spin_lock_irq(SCpnt->device->host->host_lock);
2922
2923        nsp32hw_init(data);
2924        nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2925        nsp32_do_bus_reset(data);
2926        nsp32_write2(base, IRQ_CONTROL, 0);
2927
2928        spin_unlock_irq(SCpnt->device->host->host_lock);
2929        return SUCCESS; /* Host reset is succeeded at any time. */
2930}
2931
2932
2933/**************************************************************************
2934 * EEPROM handler
2935 */
2936
2937/*
2938 * getting EEPROM parameter
2939 */
2940static int nsp32_getprom_param(nsp32_hw_data *data)
2941{
2942        int vendor = data->pci_devid->vendor;
2943        int device = data->pci_devid->device;
2944        int ret, val, i;
2945
2946        /*
2947         * EEPROM checking.
2948         */
2949        ret = nsp32_prom_read(data, 0x7e);
2950        if (ret != 0x55) {
2951                nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
2952                return FALSE;
2953        }
2954        ret = nsp32_prom_read(data, 0x7f);
2955        if (ret != 0xaa) {
2956                nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
2957                return FALSE;
2958        }
2959
2960        /*
2961         * check EEPROM type
2962         */
2963        if (vendor == PCI_VENDOR_ID_WORKBIT &&
2964            device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
2965                ret = nsp32_getprom_c16(data);
2966        } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
2967                   device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
2968                ret = nsp32_getprom_at24(data);
2969        } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
2970                   device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
2971                ret = nsp32_getprom_at24(data);
2972        } else {
2973                nsp32_msg(KERN_WARNING, "Unknown EEPROM");
2974                ret = FALSE;
2975        }
2976
2977        /* for debug : SPROM data full checking */
2978        for (i = 0; i <= 0x1f; i++) {
2979                val = nsp32_prom_read(data, i);
2980                nsp32_dbg(NSP32_DEBUG_EEPROM,
2981                          "rom address 0x%x : 0x%x", i, val);
2982        }
2983
2984        return ret;
2985}
2986
2987
2988/*
2989 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
2990 *
2991 *   ROMADDR
2992 *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
2993 *                      Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
2994 *   0x07        :  HBA Synchronous Transfer Period
2995 *                      Value 0: AutoSync, 1: Manual Setting
2996 *   0x08 - 0x0f :  Not Used? (0x0)
2997 *   0x10        :  Bus Termination
2998 *                      Value 0: Auto[ON], 1: ON, 2: OFF
2999 *   0x11        :  Not Used? (0)
3000 *   0x12        :  Bus Reset Delay Time (0x03)
3001 *   0x13        :  Bootable CD Support
3002 *                      Value 0: Disable, 1: Enable
3003 *   0x14        :  Device Scan
3004 *                      Bit   7  6  5  4  3  2  1  0
3005 *                            |  <----------------->
3006 *                            |    SCSI ID: Value 0: Skip, 1: YES
3007 *                            |->  Value 0: ALL scan,  Value 1: Manual
3008 *   0x15 - 0x1b :  Not Used? (0)
3009 *   0x1c        :  Constant? (0x01) (clock div?)
3010 *   0x1d - 0x7c :  Not Used (0xff)
3011 *   0x7d        :  Not Used? (0xff)
3012 *   0x7e        :  Constant (0x55), Validity signature
3013 *   0x7f        :  Constant (0xaa), Validity signature
3014 */
3015static int nsp32_getprom_at24(nsp32_hw_data *data)
3016{
3017        int           ret, i;
3018        int           auto_sync;
3019        nsp32_target *target;
3020        int           entry;
3021
3022        /*
3023         * Reset time which is designated by EEPROM.
3024         *
3025         * TODO: Not used yet.
3026         */
3027        data->resettime = nsp32_prom_read(data, 0x12);
3028
3029        /*
3030         * HBA Synchronous Transfer Period
3031         *
3032         * Note: auto_sync = 0: auto, 1: manual.  Ninja SCSI HBA spec says
3033         *      that if auto_sync is 0 (auto), and connected SCSI devices are
3034         *      same or lower than 3, then transfer speed is set as ULTRA-20M.
3035         *      On the contrary if connected SCSI devices are same or higher
3036         *      than 4, then transfer speed is set as FAST-10M.
3037         *
3038         *      I break this rule. The number of connected SCSI devices are
3039         *      only ignored. If auto_sync is 0 (auto), then transfer speed is
3040         *      forced as ULTRA-20M.
3041         */
3042        ret = nsp32_prom_read(data, 0x07);
3043        switch (ret) {
3044        case 0:
3045                auto_sync = TRUE;
3046                break;
3047        case 1:
3048                auto_sync = FALSE;
3049                break;
3050        default:
3051                nsp32_msg(KERN_WARNING,
3052                          "Unsupported Auto Sync mode. Fall back to manual mode.");
3053                auto_sync = TRUE;
3054        }
3055
3056        if (trans_mode == ULTRA20M_MODE) {
3057                auto_sync = TRUE;
3058        }
3059
3060        /*
3061         * each device Synchronous Transfer Period
3062         */
3063        for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3064                target = &data->target[i];
3065                if (auto_sync == TRUE) {
3066                        target->limit_entry = 0;   /* set as ULTRA20M */
3067                } else {
3068                        ret   = nsp32_prom_read(data, i);
3069                        entry = nsp32_search_period_entry(data, target, ret);
3070                        if (entry < 0) {
3071                                /* search failed... set maximum speed */
3072                                entry = 0;
3073                        }
3074                        target->limit_entry = entry;
3075                }
3076        }
3077
3078        return TRUE;
3079}
3080
3081
3082/*
3083 * C16 110 (I-O Data: SC-NBD) data map:
3084 *
3085 *   ROMADDR
3086 *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
3087 *                      Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
3088 *   0x07        :  0 (HBA Synchronous Transfer Period: Auto Sync)
3089 *   0x08 - 0x0f :  Not Used? (0x0)
3090 *   0x10        :  Transfer Mode
3091 *                      Value 0: PIO, 1: Busmater
3092 *   0x11        :  Bus Reset Delay Time (0x00-0x20)
3093 *   0x12        :  Bus Termination
3094 *                      Value 0: Disable, 1: Enable
3095 *   0x13 - 0x19 :  Disconnection
3096 *                      Value 0: Disable, 1: Enable
3097 *   0x1a - 0x7c :  Not Used? (0)
3098 *   0x7d        :  Not Used? (0xf8)
3099 *   0x7e        :  Constant (0x55), Validity signature
3100 *   0x7f        :  Constant (0xaa), Validity signature
3101 */
3102static int nsp32_getprom_c16(nsp32_hw_data *data)
3103{
3104        int           ret, i;
3105        nsp32_target *target;
3106        int           entry, val;
3107
3108        /*
3109         * Reset time which is designated by EEPROM.
3110         *
3111         * TODO: Not used yet.
3112         */
3113        data->resettime = nsp32_prom_read(data, 0x11);
3114
3115        /*
3116         * each device Synchronous Transfer Period
3117         */
3118        for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3119                target = &data->target[i];
3120                ret = nsp32_prom_read(data, i);
3121                switch (ret) {
3122                case 0:         /* 20MB/s */
3123                        val = 0x0c;
3124                        break;
3125                case 1:         /* 10MB/s */
3126                        val = 0x19;
3127                        break;
3128                case 2:         /* 5MB/s */
3129                        val = 0x32;
3130                        break;
3131                case 3:         /* ASYNC */
3132                        val = 0x00;
3133                        break;
3134                default:        /* default 20MB/s */
3135                        val = 0x0c;
3136                        break;
3137                }
3138                entry = nsp32_search_period_entry(data, target, val);
3139                if (entry < 0 || trans_mode == ULTRA20M_MODE) {
3140                        /* search failed... set maximum speed */
3141                        entry = 0;
3142                }
3143                target->limit_entry = entry;
3144        }
3145
3146        return TRUE;
3147}
3148
3149
3150/*
3151 * Atmel AT24C01A (drived in 5V) serial EEPROM routines
3152 */
3153static int nsp32_prom_read(nsp32_hw_data *data, int romaddr)
3154{
3155        int i, val;
3156
3157        /* start condition */
3158        nsp32_prom_start(data);
3159
3160        /* device address */
3161        nsp32_prom_write_bit(data, 1);  /* 1 */
3162        nsp32_prom_write_bit(data, 0);  /* 0 */
3163        nsp32_prom_write_bit(data, 1);  /* 1 */
3164        nsp32_prom_write_bit(data, 0);  /* 0 */
3165        nsp32_prom_write_bit(data, 0);  /* A2: 0 (GND) */
3166        nsp32_prom_write_bit(data, 0);  /* A1: 0 (GND) */
3167        nsp32_prom_write_bit(data, 0);  /* A0: 0 (GND) */
3168
3169        /* R/W: W for dummy write */
3170        nsp32_prom_write_bit(data, 0);
3171
3172        /* ack */
3173        nsp32_prom_write_bit(data, 0);
3174
3175        /* word address */
3176        for (i = 7; i >= 0; i--) {
3177                nsp32_prom_write_bit(data, ((romaddr >> i) & 1));
3178        }
3179
3180        /* ack */
3181        nsp32_prom_write_bit(data, 0);
3182
3183        /* start condition */
3184        nsp32_prom_start(data);
3185
3186        /* device address */
3187        nsp32_prom_write_bit(data, 1);  /* 1 */
3188        nsp32_prom_write_bit(data, 0);  /* 0 */
3189        nsp32_prom_write_bit(data, 1);  /* 1 */
3190        nsp32_prom_write_bit(data, 0);  /* 0 */
3191        nsp32_prom_write_bit(data, 0);  /* A2: 0 (GND) */
3192        nsp32_prom_write_bit(data, 0);  /* A1: 0 (GND) */
3193        nsp32_prom_write_bit(data, 0);  /* A0: 0 (GND) */
3194
3195        /* R/W: R */
3196        nsp32_prom_write_bit(data, 1);
3197
3198        /* ack */
3199        nsp32_prom_write_bit(data, 0);
3200
3201        /* data... */
3202        val = 0;
3203        for (i = 7; i >= 0; i--) {
3204                val += (nsp32_prom_read_bit(data) << i);
3205        }
3206        
3207        /* no ack */
3208        nsp32_prom_write_bit(data, 1);
3209
3210        /* stop condition */
3211        nsp32_prom_stop(data);
3212
3213        return val;
3214}
3215
3216static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val)
3217{
3218        int base = data->BaseAddress;
3219        int tmp;
3220
3221        tmp = nsp32_index_read1(base, SERIAL_ROM_CTL);
3222
3223        if (val == 0) {
3224                tmp &= ~bit;
3225        } else {
3226                tmp |=  bit;
3227        }
3228
3229        nsp32_index_write1(base, SERIAL_ROM_CTL, tmp);
3230
3231        udelay(10);
3232}
3233
3234static int nsp32_prom_get(nsp32_hw_data *data, int bit)
3235{
3236        int base = data->BaseAddress;
3237        int tmp, ret;
3238
3239        if (bit != SDA) {
3240                nsp32_msg(KERN_ERR, "return value is not appropriate");
3241                return 0;
3242        }
3243
3244
3245        tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit;
3246
3247        if (tmp == 0) {
3248                ret = 0;
3249        } else {
3250                ret = 1;
3251        }
3252
3253        udelay(10);
3254
3255        return ret;
3256}
3257
3258static void nsp32_prom_start (nsp32_hw_data *data)
3259{
3260        /* start condition */
3261        nsp32_prom_set(data, SCL, 1);
3262        nsp32_prom_set(data, SDA, 1);
3263        nsp32_prom_set(data, ENA, 1);   /* output mode */
3264        nsp32_prom_set(data, SDA, 0);   /* keeping SCL=1 and transiting
3265                                         * SDA 1->0 is start condition */
3266        nsp32_prom_set(data, SCL, 0);
3267}
3268
3269static void nsp32_prom_stop (nsp32_hw_data *data)
3270{
3271        /* stop condition */
3272        nsp32_prom_set(data, SCL, 1);
3273        nsp32_prom_set(data, SDA, 0);
3274        nsp32_prom_set(data, ENA, 1);   /* output mode */
3275        nsp32_prom_set(data, SDA, 1);
3276        nsp32_prom_set(data, SCL, 0);
3277}
3278
3279static void nsp32_prom_write_bit(nsp32_hw_data *data, int val)
3280{
3281        /* write */
3282        nsp32_prom_set(data, SDA, val);
3283        nsp32_prom_set(data, SCL, 1  );
3284        nsp32_prom_set(data, SCL, 0  );
3285}
3286
3287static int nsp32_prom_read_bit(nsp32_hw_data *data)
3288{
3289        int val;
3290
3291        /* read */
3292        nsp32_prom_set(data, ENA, 0);   /* input mode */
3293        nsp32_prom_set(data, SCL, 1);
3294
3295        val = nsp32_prom_get(data, SDA);
3296
3297        nsp32_prom_set(data, SCL, 0);
3298        nsp32_prom_set(data, ENA, 1);   /* output mode */
3299
3300        return val;
3301}
3302
3303
3304/**************************************************************************
3305 * Power Management
3306 */
3307#ifdef CONFIG_PM
3308
3309/* Device suspended */
3310static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state)
3311{
3312        struct Scsi_Host *host = pci_get_drvdata(pdev);
3313
3314        nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host);
3315
3316        pci_save_state     (pdev);
3317        pci_disable_device (pdev);
3318        pci_set_power_state(pdev, pci_choose_state(pdev, state));
3319
3320        return 0;
3321}
3322
3323/* Device woken up */
3324static int nsp32_resume(struct pci_dev *pdev)
3325{
3326        struct Scsi_Host *host = pci_get_drvdata(pdev);
3327        nsp32_hw_data    *data = (nsp32_hw_data *)host->hostdata;
3328        unsigned short    reg;
3329
3330        nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host);
3331
3332        pci_set_power_state(pdev, PCI_D0);
3333        pci_enable_wake    (pdev, PCI_D0, 0);
3334        pci_restore_state  (pdev);
3335
3336        reg = nsp32_read2(data->BaseAddress, INDEX_REG);
3337
3338        nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg);
3339
3340        if (reg == 0xffff) {
3341                nsp32_msg(KERN_INFO, "missing device. abort resume.");
3342                return 0;
3343        }
3344
3345        nsp32hw_init      (data);
3346        nsp32_do_bus_reset(data);
3347
3348        nsp32_msg(KERN_INFO, "resume success");
3349
3350        return 0;
3351}
3352
3353#endif
3354
3355/************************************************************************
3356 * PCI/Cardbus probe/remove routine
3357 */
3358static int nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3359{
3360        int ret;
3361        nsp32_hw_data *data = &nsp32_data_base;
3362
3363        nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3364
3365        ret = pci_enable_device(pdev);
3366        if (ret) {
3367                nsp32_msg(KERN_ERR, "failed to enable pci device");
3368                return ret;
3369        }
3370
3371        data->Pci         = pdev;
3372        data->pci_devid   = id;
3373        data->IrqNumber   = pdev->irq;
3374        data->BaseAddress = pci_resource_start(pdev, 0);
3375        data->NumAddress  = pci_resource_len  (pdev, 0);
3376        data->MmioAddress = pci_ioremap_bar(pdev, 1);
3377        data->MmioLength  = pci_resource_len  (pdev, 1);
3378
3379        pci_set_master(pdev);
3380
3381        ret = nsp32_detect(pdev);
3382
3383        nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s",
3384                  pdev->irq,
3385                  data->MmioAddress, data->MmioLength,
3386                  pci_name(pdev),
3387                  nsp32_model[id->driver_data]);
3388
3389        nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret);
3390
3391        return ret;
3392}
3393
3394static void nsp32_remove(struct pci_dev *pdev)
3395{
3396        struct Scsi_Host *host = pci_get_drvdata(pdev);
3397
3398        nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3399
3400        scsi_remove_host(host);
3401
3402        nsp32_release(host);
3403
3404        scsi_host_put(host);
3405}
3406
3407static struct pci_driver nsp32_driver = {
3408        .name           = "nsp32",
3409        .id_table       = nsp32_pci_table,
3410        .probe          = nsp32_probe,
3411        .remove         = nsp32_remove,
3412#ifdef CONFIG_PM
3413        .suspend        = nsp32_suspend, 
3414        .resume         = nsp32_resume, 
3415#endif
3416};
3417
3418/*********************************************************************
3419 * Moule entry point
3420 */
3421static int __init init_nsp32(void) {
3422        nsp32_msg(KERN_INFO, "loading...");
3423        return pci_register_driver(&nsp32_driver);
3424}
3425
3426static void __exit exit_nsp32(void) {
3427        nsp32_msg(KERN_INFO, "unloading...");
3428        pci_unregister_driver(&nsp32_driver);
3429}
3430
3431module_init(init_nsp32);
3432module_exit(exit_nsp32);
3433
3434/* end */
3435
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