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[PATCH] fix u32 vs. pm_message_t in drivers/mmc,mtd,scsi
[linux-3.10.git] / drivers / scsi / nsp32.c
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/version.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/sched.h>
31 #include <linux/slab.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/ioport.h>
35 #include <linux/major.h>
36 #include <linux/blkdev.h>
37 #include <linux/interrupt.h>
38 #include <linux/pci.h>
39 #include <linux/delay.h>
40 #include <linux/ctype.h>
41
42 #include <asm/dma.h>
43 #include <asm/system.h>
44 #include <asm/io.h>
45
46 #include <scsi/scsi.h>
47 #include <scsi/scsi_cmnd.h>
48 #include <scsi/scsi_device.h>
49 #include <scsi/scsi_host.h>
50 #include <scsi/scsi_ioctl.h>
51
52 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
53 # include <linux/blk.h>
54 #endif
55
56 #include "nsp32.h"
57
58
59 /***********************************************************************
60  * Module parameters
61  */
62 static int       trans_mode = 0;        /* default: BIOS */
63 module_param     (trans_mode, int, 0);
64 MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
65 #define ASYNC_MODE    1
66 #define ULTRA20M_MODE 2
67
68 static int       auto_param = 0;        /* default: ON */
69 module_param     (auto_param, bool, 0);
70 MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
71
72 static int       disc_priv  = 1;        /* default: OFF */
73 module_param     (disc_priv, bool, 0);
74 MODULE_PARM_DESC(disc_priv,  "disconnection privilege mode (0: ON 1: OFF(default))");
75
76 MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
77 MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
78 MODULE_LICENSE("GPL");
79
80 static const char *nsp32_release_version = "1.2";
81
82
83 /****************************************************************************
84  * Supported hardware
85  */
86 static struct pci_device_id nsp32_pci_table[] __devinitdata = {
87         {
88                 .vendor      = PCI_VENDOR_ID_IODATA,
89                 .device      = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
90                 .subvendor   = PCI_ANY_ID,
91                 .subdevice   = PCI_ANY_ID,
92                 .driver_data = MODEL_IODATA,
93         },
94         {
95                 .vendor      = PCI_VENDOR_ID_WORKBIT,
96                 .device      = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
97                 .subvendor   = PCI_ANY_ID,
98                 .subdevice   = PCI_ANY_ID,
99                 .driver_data = MODEL_KME,
100         },
101         {
102                 .vendor      = PCI_VENDOR_ID_WORKBIT,
103                 .device      = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
104                 .subvendor   = PCI_ANY_ID,
105                 .subdevice   = PCI_ANY_ID,
106                 .driver_data = MODEL_WORKBIT,
107         },
108         {
109                 .vendor      = PCI_VENDOR_ID_WORKBIT,
110                 .device      = PCI_DEVICE_ID_WORKBIT_STANDARD,
111                 .subvendor   = PCI_ANY_ID,
112                 .subdevice   = PCI_ANY_ID,
113                 .driver_data = MODEL_PCI_WORKBIT,
114         },
115         {
116                 .vendor      = PCI_VENDOR_ID_WORKBIT,
117                 .device      = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
118                 .subvendor   = PCI_ANY_ID,
119                 .subdevice   = PCI_ANY_ID,
120                 .driver_data = MODEL_LOGITEC,
121         },
122         {
123                 .vendor      = PCI_VENDOR_ID_WORKBIT,
124                 .device      = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
125                 .subvendor   = PCI_ANY_ID,
126                 .subdevice   = PCI_ANY_ID,
127                 .driver_data = MODEL_PCI_LOGITEC,
128         },
129         {
130                 .vendor      = PCI_VENDOR_ID_WORKBIT,
131                 .device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
132                 .subvendor   = PCI_ANY_ID,
133                 .subdevice   = PCI_ANY_ID,
134                 .driver_data = MODEL_PCI_MELCO,
135         },
136         {
137                 .vendor      = PCI_VENDOR_ID_WORKBIT,
138                 .device      = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
139                 .subvendor   = PCI_ANY_ID,
140                 .subdevice   = PCI_ANY_ID,
141                 .driver_data = MODEL_PCI_MELCO,
142         },
143         {0,0,},
144 };
145 MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
146
147 static nsp32_hw_data nsp32_data_base;  /* probe <-> detect glue */
148
149
150 /*
151  * Period/AckWidth speed conversion table
152  *
153  * Note: This period/ackwidth speed table must be in descending order.
154  */
155 static nsp32_sync_table nsp32_sync_table_40M[] = {
156      /* {PNo, AW,   SP,   EP, SREQ smpl}  Speed(MB/s) Period AckWidth */
157         {0x1,  0, 0x0c, 0x0c, SMPL_40M},  /*  20.0 :  50ns,  25ns */
158         {0x2,  0, 0x0d, 0x18, SMPL_40M},  /*  13.3 :  75ns,  25ns */
159         {0x3,  1, 0x19, 0x19, SMPL_40M},  /*  10.0 : 100ns,  50ns */
160         {0x4,  1, 0x1a, 0x1f, SMPL_20M},  /*   8.0 : 125ns,  50ns */
161         {0x5,  2, 0x20, 0x25, SMPL_20M},  /*   6.7 : 150ns,  75ns */
162         {0x6,  2, 0x26, 0x31, SMPL_20M},  /*   5.7 : 175ns,  75ns */
163         {0x7,  3, 0x32, 0x32, SMPL_20M},  /*   5.0 : 200ns, 100ns */
164         {0x8,  3, 0x33, 0x38, SMPL_10M},  /*   4.4 : 225ns, 100ns */
165         {0x9,  3, 0x39, 0x3e, SMPL_10M},  /*   4.0 : 250ns, 100ns */
166 };
167
168 static nsp32_sync_table nsp32_sync_table_20M[] = {
169         {0x1,  0, 0x19, 0x19, SMPL_40M},  /* 10.0 : 100ns,  50ns */
170         {0x2,  0, 0x1a, 0x25, SMPL_20M},  /*  6.7 : 150ns,  50ns */
171         {0x3,  1, 0x26, 0x32, SMPL_20M},  /*  5.0 : 200ns, 100ns */
172         {0x4,  1, 0x33, 0x3e, SMPL_10M},  /*  4.0 : 250ns, 100ns */
173         {0x5,  2, 0x3f, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 150ns */
174         {0x6,  2, 0x4c, 0x57, SMPL_10M},  /*  2.8 : 350ns, 150ns */
175         {0x7,  3, 0x58, 0x64, SMPL_10M},  /*  2.5 : 400ns, 200ns */
176         {0x8,  3, 0x65, 0x70, SMPL_10M},  /*  2.2 : 450ns, 200ns */
177         {0x9,  3, 0x71, 0x7d, SMPL_10M},  /*  2.0 : 500ns, 200ns */
178 };
179
180 static nsp32_sync_table nsp32_sync_table_pci[] = {
181         {0x1,  0, 0x0c, 0x0f, SMPL_40M},  /* 16.6 :  60ns,  30ns */
182         {0x2,  0, 0x10, 0x16, SMPL_40M},  /* 11.1 :  90ns,  30ns */
183         {0x3,  1, 0x17, 0x1e, SMPL_20M},  /*  8.3 : 120ns,  60ns */
184         {0x4,  1, 0x1f, 0x25, SMPL_20M},  /*  6.7 : 150ns,  60ns */
185         {0x5,  2, 0x26, 0x2d, SMPL_20M},  /*  5.6 : 180ns,  90ns */
186         {0x6,  2, 0x2e, 0x34, SMPL_10M},  /*  4.8 : 210ns,  90ns */
187         {0x7,  3, 0x35, 0x3c, SMPL_10M},  /*  4.2 : 240ns, 120ns */
188         {0x8,  3, 0x3d, 0x43, SMPL_10M},  /*  3.7 : 270ns, 120ns */
189         {0x9,  3, 0x44, 0x4b, SMPL_10M},  /*  3.3 : 300ns, 120ns */
190 };
191
192 /*
193  * function declaration
194  */
195 /* module entry point */
196 static int  __devinit nsp32_probe (struct pci_dev *, const struct pci_device_id *);
197 static void __devexit nsp32_remove(struct pci_dev *);
198 static int  __init    init_nsp32  (void);
199 static void __exit    exit_nsp32  (void);
200
201 /* struct Scsi_Host_Template */
202 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
203 static int         nsp32_proc_info   (struct Scsi_Host *, char *, char **, off_t, int, int);
204 #else
205 static int         nsp32_proc_info   (char *, char **, off_t, int, int, int);
206 #endif
207
208 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
209 static int         nsp32_detect      (struct pci_dev *pdev);
210 #else
211 static int         nsp32_detect      (Scsi_Host_Template *);
212 #endif
213 static int         nsp32_queuecommand(struct scsi_cmnd *,
214                 void (*done)(struct scsi_cmnd *));
215 static const char *nsp32_info        (struct Scsi_Host *);
216 static int         nsp32_release     (struct Scsi_Host *);
217
218 /* SCSI error handler */
219 static int         nsp32_eh_abort     (struct scsi_cmnd *);
220 static int         nsp32_eh_bus_reset (struct scsi_cmnd *);
221 static int         nsp32_eh_host_reset(struct scsi_cmnd *);
222
223 /* generate SCSI message */
224 static void nsp32_build_identify(struct scsi_cmnd *);
225 static void nsp32_build_nop     (struct scsi_cmnd *);
226 static void nsp32_build_reject  (struct scsi_cmnd *);
227 static void nsp32_build_sdtr    (struct scsi_cmnd *, unsigned char, unsigned char);
228
229 /* SCSI message handler */
230 static int  nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
231 static void nsp32_msgout_occur (struct scsi_cmnd *);
232 static void nsp32_msgin_occur  (struct scsi_cmnd *, unsigned long, unsigned short);
233
234 static int  nsp32_setup_sg_table    (struct scsi_cmnd *);
235 static int  nsp32_selection_autopara(struct scsi_cmnd *);
236 static int  nsp32_selection_autoscsi(struct scsi_cmnd *);
237 static void nsp32_scsi_done         (struct scsi_cmnd *);
238 static int  nsp32_arbitration       (struct scsi_cmnd *, unsigned int);
239 static int  nsp32_reselection       (struct scsi_cmnd *, unsigned char);
240 static void nsp32_adjust_busfree    (struct scsi_cmnd *, unsigned int);
241 static void nsp32_restart_autoscsi  (struct scsi_cmnd *, unsigned short);
242
243 /* SCSI SDTR */
244 static void nsp32_analyze_sdtr       (struct scsi_cmnd *);
245 static int  nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
246 static void nsp32_set_async          (nsp32_hw_data *, nsp32_target *);
247 static void nsp32_set_max_sync       (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
248 static void nsp32_set_sync_entry     (nsp32_hw_data *, nsp32_target *, int, unsigned char);
249
250 /* SCSI bus status handler */
251 static void nsp32_wait_req    (nsp32_hw_data *, int);
252 static void nsp32_wait_sack   (nsp32_hw_data *, int);
253 static void nsp32_sack_assert (nsp32_hw_data *);
254 static void nsp32_sack_negate (nsp32_hw_data *);
255 static void nsp32_do_bus_reset(nsp32_hw_data *);
256
257 /* hardware interrupt handler */
258 static irqreturn_t do_nsp32_isr(int, void *, struct pt_regs *);
259
260 /* initialize hardware */
261 static int  nsp32hw_init(nsp32_hw_data *);
262
263 /* EEPROM handler */
264 static        int  nsp32_getprom_param (nsp32_hw_data *);
265 static        int  nsp32_getprom_at24  (nsp32_hw_data *);
266 static        int  nsp32_getprom_c16   (nsp32_hw_data *);
267 static        void nsp32_prom_start    (nsp32_hw_data *);
268 static        void nsp32_prom_stop     (nsp32_hw_data *);
269 static        int  nsp32_prom_read     (nsp32_hw_data *, int);
270 static        int  nsp32_prom_read_bit (nsp32_hw_data *);
271 static        void nsp32_prom_write_bit(nsp32_hw_data *, int);
272 static        void nsp32_prom_set      (nsp32_hw_data *, int, int);
273 static        int  nsp32_prom_get      (nsp32_hw_data *, int);
274
275 /* debug/warning/info message */
276 static void nsp32_message (const char *, int, char *, char *, ...);
277 #ifdef NSP32_DEBUG
278 static void nsp32_dmessage(const char *, int, int,    char *, ...);
279 #endif
280
281 /*
282  * max_sectors is currently limited up to 128.
283  */
284 static struct scsi_host_template nsp32_template = {
285         .proc_name                      = "nsp32",
286         .name                           = "Workbit NinjaSCSI-32Bi/UDE",
287         .proc_info                      = nsp32_proc_info,
288         .info                           = nsp32_info,
289         .queuecommand                   = nsp32_queuecommand,
290         .can_queue                      = 1,
291         .sg_tablesize                   = NSP32_SG_SIZE,
292         .max_sectors                    = 128,
293         .cmd_per_lun                    = 1,
294         .this_id                        = NSP32_HOST_SCSIID,
295         .use_clustering                 = DISABLE_CLUSTERING,
296         .eh_abort_handler               = nsp32_eh_abort,
297 /*      .eh_device_reset_handler        = NULL, */
298         .eh_bus_reset_handler           = nsp32_eh_bus_reset,
299         .eh_host_reset_handler          = nsp32_eh_host_reset,
300 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,74))
301         .detect                         = nsp32_detect,
302         .release                        = nsp32_release,
303 #endif
304 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,2))
305         .use_new_eh_code                = 1,
306 #else
307 /*      .highmem_io                     = 1, */
308 #endif
309 };
310
311 #include "nsp32_io.h"
312
313 /***********************************************************************
314  * debug, error print
315  */
316 #ifndef NSP32_DEBUG
317 # define NSP32_DEBUG_MASK             0x000000
318 # define nsp32_msg(type, args...)     nsp32_message ("", 0, (type), args)
319 # define nsp32_dbg(mask, args...)     /* */
320 #else
321 # define NSP32_DEBUG_MASK             0xffffff
322 # define nsp32_msg(type, args...) \
323         nsp32_message (__FUNCTION__, __LINE__, (type), args)
324 # define nsp32_dbg(mask, args...) \
325         nsp32_dmessage(__FUNCTION__, __LINE__, (mask), args)
326 #endif
327
328 #define NSP32_DEBUG_QUEUECOMMAND        BIT(0)
329 #define NSP32_DEBUG_REGISTER            BIT(1)
330 #define NSP32_DEBUG_AUTOSCSI            BIT(2)
331 #define NSP32_DEBUG_INTR                BIT(3)
332 #define NSP32_DEBUG_SGLIST              BIT(4)
333 #define NSP32_DEBUG_BUSFREE             BIT(5)
334 #define NSP32_DEBUG_CDB_CONTENTS        BIT(6)
335 #define NSP32_DEBUG_RESELECTION         BIT(7)
336 #define NSP32_DEBUG_MSGINOCCUR          BIT(8)
337 #define NSP32_DEBUG_EEPROM              BIT(9)
338 #define NSP32_DEBUG_MSGOUTOCCUR         BIT(10)
339 #define NSP32_DEBUG_BUSRESET            BIT(11)
340 #define NSP32_DEBUG_RESTART             BIT(12)
341 #define NSP32_DEBUG_SYNC                BIT(13)
342 #define NSP32_DEBUG_WAIT                BIT(14)
343 #define NSP32_DEBUG_TARGETFLAG          BIT(15)
344 #define NSP32_DEBUG_PROC                BIT(16)
345 #define NSP32_DEBUG_INIT                BIT(17)
346 #define NSP32_SPECIAL_PRINT_REGISTER    BIT(20)
347
348 #define NSP32_DEBUG_BUF_LEN             100
349
350 static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
351 {
352         va_list args;
353         char buf[NSP32_DEBUG_BUF_LEN];
354
355         va_start(args, fmt);
356         vsnprintf(buf, sizeof(buf), fmt, args);
357         va_end(args);
358
359 #ifndef NSP32_DEBUG
360         printk("%snsp32: %s\n", type, buf);
361 #else
362         printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
363 #endif
364 }
365
366 #ifdef NSP32_DEBUG
367 static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
368 {
369         va_list args;
370         char buf[NSP32_DEBUG_BUF_LEN];
371
372         va_start(args, fmt);
373         vsnprintf(buf, sizeof(buf), fmt, args);
374         va_end(args);
375
376         if (mask & NSP32_DEBUG_MASK) {
377                 printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
378         }
379 }
380 #endif
381
382 #ifdef NSP32_DEBUG
383 # include "nsp32_debug.c"
384 #else
385 # define show_command(arg)   /* */
386 # define show_busphase(arg)  /* */
387 # define show_autophase(arg) /* */
388 #endif
389
390 /*
391  * IDENTIFY Message
392  */
393 static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
394 {
395         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
396         int pos             = data->msgout_len;
397         int mode            = FALSE;
398
399         /* XXX: Auto DiscPriv detection is progressing... */
400         if (disc_priv == 0) {
401                 /* mode = TRUE; */
402         }
403
404         data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
405
406         data->msgout_len = pos;
407 }
408
409 /*
410  * SDTR Message Routine
411  */
412 static void nsp32_build_sdtr(struct scsi_cmnd    *SCpnt,
413                              unsigned char period,
414                              unsigned char offset)
415 {
416         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
417         int pos             = data->msgout_len;
418
419         data->msgoutbuf[pos] = EXTENDED_MESSAGE;  pos++;
420         data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
421         data->msgoutbuf[pos] = EXTENDED_SDTR;     pos++;
422         data->msgoutbuf[pos] = period;            pos++;
423         data->msgoutbuf[pos] = offset;            pos++;
424
425         data->msgout_len = pos;
426 }
427
428 /*
429  * No Operation Message
430  */
431 static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
432 {
433         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
434         int            pos  = data->msgout_len;
435
436         if (pos != 0) {
437                 nsp32_msg(KERN_WARNING,
438                           "Some messages are already contained!");
439                 return;
440         }
441
442         data->msgoutbuf[pos] = NOP; pos++;
443         data->msgout_len = pos;
444 }
445
446 /*
447  * Reject Message
448  */
449 static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
450 {
451         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
452         int            pos  = data->msgout_len;
453
454         data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
455         data->msgout_len = pos;
456 }
457         
458 /*
459  * timer
460  */
461 #if 0
462 static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
463 {
464         unsigned int base = SCpnt->host->io_port;
465
466         nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
467
468         if (time & (~TIMER_CNT_MASK)) {
469                 nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
470         }
471
472         nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
473 }
474 #endif
475
476
477 /*
478  * set SCSI command and other parameter to asic, and start selection phase
479  */
480 static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
481 {
482         nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
483         unsigned int    base    = SCpnt->device->host->io_port;
484         unsigned int    host_id = SCpnt->device->host->this_id;
485         unsigned char   target  = SCpnt->device->id;
486         nsp32_autoparam *param  = data->autoparam;
487         unsigned char   phase;
488         int             i, ret;
489         unsigned int    msgout;
490         u16_le          s;
491
492         nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
493
494         /*
495          * check bus free
496          */
497         phase = nsp32_read1(base, SCSI_BUS_MONITOR);
498         if (phase != BUSMON_BUS_FREE) {
499                 nsp32_msg(KERN_WARNING, "bus busy");
500                 show_busphase(phase & BUSMON_PHASE_MASK);
501                 SCpnt->result = DID_BUS_BUSY << 16;
502                 return FALSE;
503         }
504
505         /*
506          * message out
507          *
508          * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
509          *       over 3 messages needs another routine.
510          */
511         if (data->msgout_len == 0) {
512                 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
513                 SCpnt->result = DID_ERROR << 16;
514                 return FALSE;
515         } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
516                 msgout = 0;
517                 for (i = 0; i < data->msgout_len; i++) {
518                         /*
519                          * the sending order of the message is:
520                          *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
521                          *  MCNT 2:          MSG#1 -> MSG#2
522                          *  MCNT 1:                   MSG#2    
523                          */
524                         msgout >>= 8;
525                         msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
526                 }
527                 msgout |= MV_VALID;     /* MV valid */
528                 msgout |= (unsigned int)data->msgout_len; /* len */
529         } else {
530                 /* data->msgout_len > 3 */
531                 msgout = 0;
532         }
533
534         // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
535         // nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
536
537         /*
538          * setup asic parameter
539          */
540         memset(param, 0, sizeof(nsp32_autoparam));
541
542         /* cdb */
543         for (i = 0; i < SCpnt->cmd_len; i++) {
544                 param->cdb[4 * i] = SCpnt->cmnd[i];
545         }
546
547         /* outgoing messages */
548         param->msgout = cpu_to_le32(msgout);
549
550         /* syncreg, ackwidth, target id, SREQ sampling rate */
551         param->syncreg    = data->cur_target->syncreg;
552         param->ackwidth   = data->cur_target->ackwidth;
553         param->target_id  = BIT(host_id) | BIT(target);
554         param->sample_reg = data->cur_target->sample_reg;
555
556         // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
557
558         /* command control */
559         param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
560                                              AUTOSCSI_START         |
561                                              AUTO_MSGIN_00_OR_04    |
562                                              AUTO_MSGIN_02          |
563                                              AUTO_ATN               );
564
565
566         /* transfer control */
567         s = 0;
568         switch (data->trans_method) {
569         case NSP32_TRANSFER_BUSMASTER:
570                 s |= BM_START;
571                 break;
572         case NSP32_TRANSFER_MMIO:
573                 s |= CB_MMIO_MODE;
574                 break;
575         case NSP32_TRANSFER_PIO:
576                 s |= CB_IO_MODE;
577                 break;
578         default:
579                 nsp32_msg(KERN_ERR, "unknown trans_method");
580                 break;
581         }
582         /*
583          * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
584          * For bus master transfer, it's taken off.
585          */
586         s |= (TRANSFER_GO | ALL_COUNTER_CLR);
587         param->transfer_control = cpu_to_le16(s);
588
589         /* sg table addr */
590         param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
591
592         /*
593          * transfer parameter to ASIC
594          */
595         nsp32_write4(base, SGT_ADR,         data->auto_paddr);
596         nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
597                                             AUTO_PARAMETER         );
598
599         /*
600          * Check arbitration
601          */
602         ret = nsp32_arbitration(SCpnt, base);
603
604         return ret;
605 }
606
607
608 /*
609  * Selection with AUTO SCSI (without AUTO PARAMETER)
610  */
611 static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
612 {
613         nsp32_hw_data  *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
614         unsigned int    base    = SCpnt->device->host->io_port;
615         unsigned int    host_id = SCpnt->device->host->this_id;
616         unsigned char   target  = SCpnt->device->id;
617         unsigned char   phase;
618         int             status;
619         unsigned short  command = 0;
620         unsigned int    msgout  = 0;
621         unsigned short  execph;
622         int             i;
623
624         nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
625
626         /*
627          * IRQ disable
628          */
629         nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
630
631         /*
632          * check bus line
633          */
634         phase = nsp32_read1(base, SCSI_BUS_MONITOR);
635         if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
636                 nsp32_msg(KERN_WARNING, "bus busy");
637                 SCpnt->result = DID_BUS_BUSY << 16;
638                 status = 1;
639                 goto out;
640         }
641
642         /*
643          * clear execph
644          */
645         execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
646
647         /*
648          * clear FIFO counter to set CDBs
649          */
650         nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
651
652         /*
653          * set CDB0 - CDB15
654          */
655         for (i = 0; i < SCpnt->cmd_len; i++) {
656                 nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
657         }
658         nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
659
660         /*
661          * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
662          */
663         nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
664
665         /*
666          * set SCSI MSGOUT REG
667          *
668          * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
669          *       over 3 messages needs another routine.
670          */
671         if (data->msgout_len == 0) {
672                 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
673                 SCpnt->result = DID_ERROR << 16;
674                 status = 1;
675                 goto out;
676         } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
677                 msgout = 0;
678                 for (i = 0; i < data->msgout_len; i++) {
679                         /*
680                          * the sending order of the message is:
681                          *  MCNT 3: MSG#0 -> MSG#1 -> MSG#2
682                          *  MCNT 2:          MSG#1 -> MSG#2
683                          *  MCNT 1:                   MSG#2    
684                          */
685                         msgout >>= 8;
686                         msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
687                 }
688                 msgout |= MV_VALID;     /* MV valid */
689                 msgout |= (unsigned int)data->msgout_len; /* len */
690                 nsp32_write4(base, SCSI_MSG_OUT, msgout);
691         } else {
692                 /* data->msgout_len > 3 */
693                 nsp32_write4(base, SCSI_MSG_OUT, 0);
694         }
695
696         /*
697          * set selection timeout(= 250ms)
698          */
699         nsp32_write2(base, SEL_TIME_OUT,   SEL_TIMEOUT_TIME);
700
701         /*
702          * set SREQ hazard killer sampling rate
703          * 
704          * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
705          *      check other internal clock!
706          */
707         nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
708
709         /*
710          * clear Arbit
711          */
712         nsp32_write1(base, SET_ARBIT,      ARBIT_CLEAR);
713
714         /*
715          * set SYNCREG
716          * Don't set BM_START_ADR before setting this register.
717          */
718         nsp32_write1(base, SYNC_REG,  data->cur_target->syncreg);
719
720         /*
721          * set ACKWIDTH
722          */
723         nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
724
725         nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
726                   "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
727                   nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
728                   nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
729         nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
730                   data->msgout_len, msgout);
731
732         /*
733          * set SGT ADDR (physical address)
734          */
735         nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
736
737         /*
738          * set TRANSFER CONTROL REG
739          */
740         command = 0;
741         command |= (TRANSFER_GO | ALL_COUNTER_CLR);
742         if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
743                 if (SCpnt->request_bufflen > 0) {
744                         command |= BM_START;
745                 }
746         } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
747                 command |= CB_MMIO_MODE;
748         } else if (data->trans_method & NSP32_TRANSFER_PIO) {
749                 command |= CB_IO_MODE;
750         }
751         nsp32_write2(base, TRANSFER_CONTROL, command);
752
753         /*
754          * start AUTO SCSI, kick off arbitration
755          */
756         command = (CLEAR_CDB_FIFO_POINTER |
757                    AUTOSCSI_START         |
758                    AUTO_MSGIN_00_OR_04    |
759                    AUTO_MSGIN_02          |
760                    AUTO_ATN                );
761         nsp32_write2(base, COMMAND_CONTROL, command);
762
763         /*
764          * Check arbitration
765          */
766         status = nsp32_arbitration(SCpnt, base);
767
768  out:
769         /*
770          * IRQ enable
771          */
772         nsp32_write2(base, IRQ_CONTROL, 0);
773
774         return status;
775 }
776
777
778 /*
779  * Arbitration Status Check
780  *      
781  * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
782  *       Using udelay(1) consumes CPU time and system time, but 
783  *       arbitration delay time is defined minimal 2.4us in SCSI
784  *       specification, thus udelay works as coarse grained wait timer.
785  */
786 static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
787 {
788         unsigned char arbit;
789         int           status = TRUE;
790         int           time   = 0;
791
792         do {
793                 arbit = nsp32_read1(base, ARBIT_STATUS);
794                 time++;
795         } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
796                  (time <= ARBIT_TIMEOUT_TIME));
797
798         nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
799                   "arbit: 0x%x, delay time: %d", arbit, time);
800
801         if (arbit & ARBIT_WIN) {
802                 /* Arbitration succeeded */
803                 SCpnt->result = DID_OK << 16;
804                 nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
805         } else if (arbit & ARBIT_FAIL) {
806                 /* Arbitration failed */
807                 SCpnt->result = DID_BUS_BUSY << 16;
808                 status = FALSE;
809         } else {
810                 /*
811                  * unknown error or ARBIT_GO timeout,
812                  * something lock up! guess no connection.
813                  */
814                 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
815                 SCpnt->result = DID_NO_CONNECT << 16;
816                 status = FALSE;
817         }
818
819         /*
820          * clear Arbit
821          */
822         nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
823
824         return status;
825 }
826
827
828 /*
829  * reselection
830  *
831  * Note: This reselection routine is called from msgin_occur,
832  *       reselection target id&lun must be already set.
833  *       SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
834  */
835 static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
836 {
837         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
838         unsigned int   host_id = SCpnt->device->host->this_id;
839         unsigned int   base    = SCpnt->device->host->io_port;
840         unsigned char  tmpid, newid;
841
842         nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
843
844         /*
845          * calculate reselected SCSI ID
846          */
847         tmpid = nsp32_read1(base, RESELECT_ID);
848         tmpid &= (~BIT(host_id));
849         newid = 0;
850         while (tmpid) {
851                 if (tmpid & 1) {
852                         break;
853                 }
854                 tmpid >>= 1;
855                 newid++;
856         }
857
858         /*
859          * If reselected New ID:LUN is not existed
860          * or current nexus is not existed, unexpected
861          * reselection is occurred. Send reject message.
862          */
863         if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
864                 nsp32_msg(KERN_WARNING, "unknown id/lun");
865                 return FALSE;
866         } else if(data->lunt[newid][newlun].SCpnt == NULL) {
867                 nsp32_msg(KERN_WARNING, "no SCSI command is processing");
868                 return FALSE;
869         }
870
871         data->cur_id    = newid;
872         data->cur_lun   = newlun;
873         data->cur_target = &(data->target[newid]);
874         data->cur_lunt   = &(data->lunt[newid][newlun]);
875
876         /* reset SACK/SavedACK counter (or ALL clear?) */
877         nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
878
879         return TRUE;
880 }
881
882
883 /*
884  * nsp32_setup_sg_table - build scatter gather list for transfer data
885  *                          with bus master.
886  *
887  * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
888  */
889 static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
890 {
891         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
892         struct scatterlist   *sgl;
893         nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
894         int num, i;
895         u32_le l;
896
897         if (SCpnt->request_bufflen == 0) {
898                 return TRUE;
899         }
900
901         if (sgt == NULL) {
902                 nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
903                 return FALSE;
904         }
905
906         if (SCpnt->use_sg) {
907                 sgl = (struct scatterlist *)SCpnt->request_buffer;
908                 num = pci_map_sg(data->Pci, sgl, SCpnt->use_sg,
909                                  SCpnt->sc_data_direction);
910                 for (i = 0; i < num; i++) {
911                         /*
912                          * Build nsp32_sglist, substitute sg dma addresses.
913                          */
914                         sgt[i].addr = cpu_to_le32(sg_dma_address(sgl));
915                         sgt[i].len  = cpu_to_le32(sg_dma_len(sgl));
916                         sgl++;
917
918                         if (le32_to_cpu(sgt[i].len) > 0x10000) {
919                                 nsp32_msg(KERN_ERR,
920                                         "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
921                                 return FALSE;
922                         }
923                         nsp32_dbg(NSP32_DEBUG_SGLIST,
924                                   "num 0x%x : addr 0x%lx len 0x%lx",
925                                   i,
926                                   le32_to_cpu(sgt[i].addr),
927                                   le32_to_cpu(sgt[i].len ));
928                 }
929
930                 /* set end mark */
931                 l = le32_to_cpu(sgt[num-1].len);
932                 sgt[num-1].len = cpu_to_le32(l | SGTEND);
933
934         } else {
935                 SCpnt->SCp.have_data_in = pci_map_single(data->Pci,
936                         SCpnt->request_buffer, SCpnt->request_bufflen,
937                         SCpnt->sc_data_direction);
938
939                 sgt[0].addr = cpu_to_le32(SCpnt->SCp.have_data_in);
940                 sgt[0].len  = cpu_to_le32(SCpnt->request_bufflen | SGTEND); /* set end mark */
941
942                 if (SCpnt->request_bufflen > 0x10000) {
943                         nsp32_msg(KERN_ERR,
944                                   "can't transfer over 64KB at a time, size=0x%lx", SCpnt->request_bufflen);
945                         return FALSE;
946                 }
947                 nsp32_dbg(NSP32_DEBUG_SGLIST, "single : addr 0x%lx len=0x%lx",
948                           le32_to_cpu(sgt[0].addr),
949                           le32_to_cpu(sgt[0].len ));
950         }
951
952         return TRUE;
953 }
954
955 static int nsp32_queuecommand(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
956 {
957         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
958         nsp32_target *target;
959         nsp32_lunt   *cur_lunt;
960         int ret;
961
962         nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
963                   "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
964                   "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
965                   SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
966                   SCpnt->use_sg, SCpnt->request_buffer, SCpnt->request_bufflen);
967
968         if (data->CurrentSC != NULL) {
969                 nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
970                 data->CurrentSC = NULL;
971                 SCpnt->result   = DID_NO_CONNECT << 16;
972                 done(SCpnt);
973                 return 0;
974         }
975
976         /* check target ID is not same as this initiator ID */
977         if (SCpnt->device->id == SCpnt->device->host->this_id) {
978                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
979                 SCpnt->result = DID_BAD_TARGET << 16;
980                 done(SCpnt);
981                 return 0;
982         }
983
984         /* check target LUN is allowable value */
985         if (SCpnt->device->lun >= MAX_LUN) {
986                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
987                 SCpnt->result = DID_BAD_TARGET << 16;
988                 done(SCpnt);
989                 return 0;
990         }
991
992         show_command(SCpnt);
993
994         SCpnt->scsi_done     = done;
995         data->CurrentSC      = SCpnt;
996         SCpnt->SCp.Status    = CHECK_CONDITION;
997         SCpnt->SCp.Message   = 0;
998         SCpnt->resid         = SCpnt->request_bufflen;
999
1000         SCpnt->SCp.ptr              = (char *) SCpnt->request_buffer;
1001         SCpnt->SCp.this_residual    = SCpnt->request_bufflen;
1002         SCpnt->SCp.buffer           = NULL;
1003         SCpnt->SCp.buffers_residual = 0;
1004
1005         /* initialize data */
1006         data->msgout_len        = 0;
1007         data->msgin_len         = 0;
1008         cur_lunt                = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
1009         cur_lunt->SCpnt         = SCpnt;
1010         cur_lunt->save_datp     = 0;
1011         cur_lunt->msgin03       = FALSE;
1012         data->cur_lunt          = cur_lunt;
1013         data->cur_id            = SCpnt->device->id;
1014         data->cur_lun           = SCpnt->device->lun;
1015
1016         ret = nsp32_setup_sg_table(SCpnt);
1017         if (ret == FALSE) {
1018                 nsp32_msg(KERN_ERR, "SGT fail");
1019                 SCpnt->result = DID_ERROR << 16;
1020                 nsp32_scsi_done(SCpnt);
1021                 return 0;
1022         }
1023
1024         /* Build IDENTIFY */
1025         nsp32_build_identify(SCpnt);
1026
1027         /* 
1028          * If target is the first time to transfer after the reset
1029          * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
1030          * message SDTR is needed to do synchronous transfer.
1031          */
1032         target = &data->target[SCpnt->device->id];
1033         data->cur_target = target;
1034
1035         if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
1036                 unsigned char period, offset;
1037
1038                 if (trans_mode != ASYNC_MODE) {
1039                         nsp32_set_max_sync(data, target, &period, &offset);
1040                         nsp32_build_sdtr(SCpnt, period, offset);
1041                         target->sync_flag |= SDTR_INITIATOR;
1042                 } else {
1043                         nsp32_set_async(data, target);
1044                         target->sync_flag |= SDTR_DONE;
1045                 }
1046
1047                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1048                           "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
1049                           target->limit_entry, period, offset);
1050         } else if (target->sync_flag & SDTR_INITIATOR) {
1051                 /*
1052                  * It was negotiating SDTR with target, sending from the
1053                  * initiator, but there are no chance to remove this flag.
1054                  * Set async because we don't get proper negotiation.
1055                  */
1056                 nsp32_set_async(data, target);
1057                 target->sync_flag &= ~SDTR_INITIATOR;
1058                 target->sync_flag |= SDTR_DONE;
1059
1060                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1061                           "SDTR_INITIATOR: fall back to async");
1062         } else if (target->sync_flag & SDTR_TARGET) {
1063                 /*
1064                  * It was negotiating SDTR with target, sending from target,
1065                  * but there are no chance to remove this flag.  Set async
1066                  * because we don't get proper negotiation.
1067                  */
1068                 nsp32_set_async(data, target);
1069                 target->sync_flag &= ~SDTR_TARGET;
1070                 target->sync_flag |= SDTR_DONE;
1071
1072                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1073                           "Unknown SDTR from target is reached, fall back to async.");
1074         }
1075
1076         nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
1077                   "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
1078                   SCpnt->device->id, target->sync_flag, target->syncreg,
1079                   target->ackwidth);
1080
1081         /* Selection */
1082         if (auto_param == 0) {
1083                 ret = nsp32_selection_autopara(SCpnt);
1084         } else {
1085                 ret = nsp32_selection_autoscsi(SCpnt);
1086         }
1087
1088         if (ret != TRUE) {
1089                 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
1090                 nsp32_scsi_done(SCpnt);
1091         }
1092
1093         return 0;
1094 }
1095
1096 /* initialize asic */
1097 static int nsp32hw_init(nsp32_hw_data *data)
1098 {
1099         unsigned int   base = data->BaseAddress;
1100         unsigned short irq_stat;
1101         unsigned long  lc_reg;
1102         unsigned char  power;
1103
1104         lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
1105         if ((lc_reg & 0xff00) == 0) {
1106                 lc_reg |= (0x20 << 8);
1107                 nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
1108         }
1109
1110         nsp32_write2(base, IRQ_CONTROL,        IRQ_CONTROL_ALL_IRQ_MASK);
1111         nsp32_write2(base, TRANSFER_CONTROL,   0);
1112         nsp32_write4(base, BM_CNT,             0);
1113         nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1114
1115         do {
1116                 irq_stat = nsp32_read2(base, IRQ_STATUS);
1117                 nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
1118         } while (irq_stat & IRQSTATUS_ANY_IRQ);
1119
1120         /*
1121          * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
1122          *  designated by specification.
1123          */
1124         if ((data->trans_method & NSP32_TRANSFER_PIO) ||
1125             (data->trans_method & NSP32_TRANSFER_MMIO)) {
1126                 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x40);
1127                 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
1128         } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
1129                 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT,  0x10);
1130                 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
1131         } else {
1132                 nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
1133         }
1134
1135         nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
1136                   nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
1137                   nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
1138
1139         nsp32_index_write1(base, CLOCK_DIV, data->clock);
1140         nsp32_index_write1(base, BM_CYCLE,  MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
1141         nsp32_write1(base, PARITY_CONTROL, 0);  /* parity check is disable */
1142
1143         /*
1144          * initialize MISC_WRRD register
1145          * 
1146          * Note: Designated parameters is obeyed as following:
1147          *      MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
1148          *      MISC_MASTER_TERMINATION_SELECT:      It must be set.
1149          *      MISC_BMREQ_NEGATE_TIMING_SEL:        It should be set.
1150          *      MISC_AUTOSEL_TIMING_SEL:             It should be set.
1151          *      MISC_BMSTOP_CHANGE2_NONDATA_PHASE:   It should be set.
1152          *      MISC_DELAYED_BMSTART:                It's selected for safety.
1153          *
1154          * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
1155          *      we have to set TRANSFERCONTROL_BM_START as 0 and set
1156          *      appropriate value before restarting bus master transfer.
1157          */
1158         nsp32_index_write2(base, MISC_WR,
1159                            (SCSI_DIRECTION_DETECTOR_SELECT |
1160                             DELAYED_BMSTART                |
1161                             MASTER_TERMINATION_SELECT      |
1162                             BMREQ_NEGATE_TIMING_SEL        |
1163                             AUTOSEL_TIMING_SEL             |
1164                             BMSTOP_CHANGE2_NONDATA_PHASE));
1165
1166         nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
1167         power = nsp32_index_read1(base, TERM_PWR_CONTROL);
1168         if (!(power & SENSE)) {
1169                 nsp32_msg(KERN_INFO, "term power on");
1170                 nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
1171         }
1172
1173         nsp32_write2(base, TIMER_SET, TIMER_STOP);
1174         nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
1175
1176         nsp32_write1(base, SYNC_REG,     0);
1177         nsp32_write1(base, ACK_WIDTH,    0);
1178         nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
1179
1180         /*
1181          * enable to select designated IRQ (except for
1182          * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
1183          */
1184         nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ         |
1185                                              IRQSELECT_SCSIRESET_IRQ     |
1186                                              IRQSELECT_FIFO_SHLD_IRQ     |
1187                                              IRQSELECT_RESELECT_IRQ      |
1188                                              IRQSELECT_PHASE_CHANGE_IRQ  |
1189                                              IRQSELECT_AUTO_SCSI_SEQ_IRQ |
1190                                           //   IRQSELECT_BMCNTERR_IRQ      |
1191                                              IRQSELECT_TARGET_ABORT_IRQ  |
1192                                              IRQSELECT_MASTER_ABORT_IRQ );
1193         nsp32_write2(base, IRQ_CONTROL, 0);
1194
1195         /* PCI LED off */
1196         nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
1197         nsp32_index_write1(base, EXT_PORT,     LED_OFF);
1198
1199         return TRUE;
1200 }
1201
1202
1203 /* interrupt routine */
1204 static irqreturn_t do_nsp32_isr(int irq, void *dev_id, struct pt_regs *regs)
1205 {
1206         nsp32_hw_data *data = dev_id;
1207         unsigned int base = data->BaseAddress;
1208         struct scsi_cmnd *SCpnt = data->CurrentSC;
1209         unsigned short auto_stat, irq_stat, trans_stat;
1210         unsigned char busmon, busphase;
1211         unsigned long flags;
1212         int ret;
1213         int handled = 0;
1214
1215 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1216         struct Scsi_Host *host = data->Host;
1217         spin_lock_irqsave(host->host_lock, flags);
1218 #else
1219         spin_lock_irqsave(&io_request_lock, flags);
1220 #endif
1221
1222         /*
1223          * IRQ check, then enable IRQ mask
1224          */
1225         irq_stat = nsp32_read2(base, IRQ_STATUS);
1226         nsp32_dbg(NSP32_DEBUG_INTR, 
1227                   "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
1228         /* is this interrupt comes from Ninja asic? */
1229         if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
1230                 nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
1231                 goto out2;
1232         }
1233         handled = 1;
1234         nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1235
1236         busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
1237         busphase = busmon & BUSMON_PHASE_MASK;
1238
1239         trans_stat = nsp32_read2(base, TRANSFER_STATUS);
1240         if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
1241                 nsp32_msg(KERN_INFO, "card disconnect");
1242                 if (data->CurrentSC != NULL) {
1243                         nsp32_msg(KERN_INFO, "clean up current SCSI command");
1244                         SCpnt->result = DID_BAD_TARGET << 16;
1245                         nsp32_scsi_done(SCpnt);
1246                 }
1247                 goto out;
1248         }
1249
1250         /* Timer IRQ */
1251         if (irq_stat & IRQSTATUS_TIMER_IRQ) {
1252                 nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
1253                 nsp32_write2(base, TIMER_SET, TIMER_STOP);
1254                 goto out;
1255         }
1256
1257         /* SCSI reset */
1258         if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
1259                 nsp32_msg(KERN_INFO, "detected someone do bus reset");
1260                 nsp32_do_bus_reset(data);
1261                 if (SCpnt != NULL) {
1262                         SCpnt->result = DID_RESET << 16;
1263                         nsp32_scsi_done(SCpnt);
1264                 }
1265                 goto out;
1266         }
1267
1268         if (SCpnt == NULL) {
1269                 nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
1270                 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1271                 goto out;
1272         }
1273
1274         /*
1275          * AutoSCSI Interrupt.
1276          * Note: This interrupt is occurred when AutoSCSI is finished.  Then
1277          * check SCSIEXECUTEPHASE, and do appropriate action.  Each phases are
1278          * recorded when AutoSCSI sequencer has been processed.
1279          */
1280         if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
1281                 /* getting SCSI executed phase */
1282                 auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
1283                 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1284
1285                 /* Selection Timeout, go busfree phase. */
1286                 if (auto_stat & SELECTION_TIMEOUT) {
1287                         nsp32_dbg(NSP32_DEBUG_INTR,
1288                                   "selection timeout occurred");
1289
1290                         SCpnt->result = DID_TIME_OUT << 16;
1291                         nsp32_scsi_done(SCpnt);
1292                         goto out;
1293                 }
1294
1295                 if (auto_stat & MSGOUT_PHASE) {
1296                         /*
1297                          * MsgOut phase was processed.
1298                          * If MSG_IN_OCCUER is not set, then MsgOut phase is
1299                          * completed. Thus, msgout_len must reset.  Otherwise,
1300                          * nothing to do here. If MSG_OUT_OCCUER is occurred,
1301                          * then we will encounter the condition and check.
1302                          */
1303                         if (!(auto_stat & MSG_IN_OCCUER) &&
1304                              (data->msgout_len <= 3)) {
1305                                 /*
1306                                  * !MSG_IN_OCCUER && msgout_len <=3
1307                                  *   ---> AutoSCSI with MSGOUTreg is processed.
1308                                  */
1309                                 data->msgout_len = 0;
1310                         };
1311
1312                         nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
1313                 }
1314
1315                 if ((auto_stat & DATA_IN_PHASE) &&
1316                     (SCpnt->resid > 0) &&
1317                     ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
1318                         printk( "auto+fifo\n");
1319                         //nsp32_pio_read(SCpnt);
1320                 }
1321
1322                 if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
1323                         /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
1324                         nsp32_dbg(NSP32_DEBUG_INTR,
1325                                   "Data in/out phase processed");
1326
1327                         /* read BMCNT, SGT pointer addr */
1328                         nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx", 
1329                                     nsp32_read4(base, BM_CNT));
1330                         nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx", 
1331                                     nsp32_read4(base, SGT_ADR));
1332                         nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx", 
1333                                     nsp32_read4(base, SACK_CNT));
1334                         nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx", 
1335                                     nsp32_read4(base, SAVED_SACK_CNT));
1336
1337                         SCpnt->resid = 0; /* all data transfered! */
1338                 }
1339
1340                 /*
1341                  * MsgIn Occur
1342                  */
1343                 if (auto_stat & MSG_IN_OCCUER) {
1344                         nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
1345                 }
1346
1347                 /*
1348                  * MsgOut Occur
1349                  */
1350                 if (auto_stat & MSG_OUT_OCCUER) {
1351                         nsp32_msgout_occur(SCpnt);
1352                 }
1353
1354                 /*
1355                  * Bus Free Occur
1356                  */
1357                 if (auto_stat & BUS_FREE_OCCUER) {
1358                         ret = nsp32_busfree_occur(SCpnt, auto_stat);
1359                         if (ret == TRUE) {
1360                                 goto out;
1361                         }
1362                 }
1363
1364                 if (auto_stat & STATUS_PHASE) {
1365                         /*
1366                          * Read CSB and substitute CSB for SCpnt->result
1367                          * to save status phase stutas byte.
1368                          * scsi error handler checks host_byte (DID_*:
1369                          * low level driver to indicate status), then checks 
1370                          * status_byte (SCSI status byte).
1371                          */
1372                         SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN);
1373                 }
1374
1375                 if (auto_stat & ILLEGAL_PHASE) {
1376                         /* Illegal phase is detected. SACK is not back. */
1377                         nsp32_msg(KERN_WARNING, 
1378                                   "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
1379
1380                         /* TODO: currently we don't have any action... bus reset? */
1381
1382                         /*
1383                          * To send back SACK, assert, wait, and negate.
1384                          */
1385                         nsp32_sack_assert(data);
1386                         nsp32_wait_req(data, NEGATE);
1387                         nsp32_sack_negate(data);
1388
1389                 }
1390
1391                 if (auto_stat & COMMAND_PHASE) {
1392                         /* nothing to do */
1393                         nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
1394                 }
1395
1396                 if (auto_stat & AUTOSCSI_BUSY) {
1397                         /* AutoSCSI is running */
1398                 }
1399
1400                 show_autophase(auto_stat);
1401         }
1402
1403         /* FIFO_SHLD_IRQ */
1404         if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
1405                 nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
1406
1407                 switch(busphase) {
1408                 case BUSPHASE_DATA_OUT:
1409                         nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
1410
1411                         //nsp32_pio_write(SCpnt);
1412
1413                         break;
1414
1415                 case BUSPHASE_DATA_IN:
1416                         nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
1417
1418                         //nsp32_pio_read(SCpnt);
1419
1420                         break;
1421
1422                 case BUSPHASE_STATUS:
1423                         nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
1424
1425                         SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1426
1427                         break;
1428                 default:
1429                         nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
1430                         nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1431                         show_busphase(busphase);
1432                         break;
1433                 }
1434
1435                 goto out;
1436         }
1437
1438         /* Phase Change IRQ */
1439         if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
1440                 nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
1441
1442                 switch(busphase) {
1443                 case BUSPHASE_MESSAGE_IN:
1444                         nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
1445                         nsp32_msgin_occur(SCpnt, irq_stat, 0);
1446                         break;
1447                 default:
1448                         nsp32_msg(KERN_WARNING, "phase chg/other phase?");
1449                         nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
1450                                   irq_stat, trans_stat);
1451                         show_busphase(busphase);
1452                         break;
1453                 }
1454                 goto out;
1455         }
1456
1457         /* PCI_IRQ */
1458         if (irq_stat & IRQSTATUS_PCI_IRQ) {
1459                 nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
1460                 /* Do nothing */
1461         }
1462
1463         /* BMCNTERR_IRQ */
1464         if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
1465                 nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
1466                 /*
1467                  * TODO: To be implemented improving bus master
1468                  * transfer reliablity when BMCNTERR is occurred in
1469                  * AutoSCSI phase described in specification.
1470                  */
1471         }
1472
1473 #if 0
1474         nsp32_dbg(NSP32_DEBUG_INTR,
1475                   "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1476         show_busphase(busphase);
1477 #endif
1478
1479  out:
1480         /* disable IRQ mask */
1481         nsp32_write2(base, IRQ_CONTROL, 0);
1482
1483  out2:
1484 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1485         spin_unlock_irqrestore(host->host_lock, flags);
1486 #else
1487         spin_unlock_irqrestore(&io_request_lock, flags);
1488 #endif
1489
1490         nsp32_dbg(NSP32_DEBUG_INTR, "exit");
1491
1492         return IRQ_RETVAL(handled);
1493 }
1494
1495 #undef SPRINTF
1496 #define SPRINTF(args...) \
1497         do { \
1498                 if(length > (pos - buffer)) { \
1499                         pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
1500                         nsp32_dbg(NSP32_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length,  length - (pos - buffer));\
1501                 } \
1502         } while(0)
1503 static int nsp32_proc_info(
1504 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73)) 
1505         struct Scsi_Host *host,
1506 #endif
1507         char             *buffer,
1508         char            **start,
1509         off_t             offset,
1510         int               length,
1511 #if !(LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73)) 
1512         int               hostno,
1513 #endif
1514         int               inout)
1515 {
1516         char             *pos = buffer;
1517         int               thislength;
1518         unsigned long     flags;
1519         nsp32_hw_data    *data;
1520 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73)) 
1521         int               hostno;
1522 #else
1523         struct Scsi_Host *host;
1524 #endif
1525         unsigned int      base;
1526         unsigned char     mode_reg;
1527         int               id, speed;
1528         long              model;
1529
1530         /* Write is not supported, just return. */
1531         if (inout == TRUE) {
1532                 return -EINVAL;
1533         }
1534
1535 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73)) 
1536         hostno = host->host_no;
1537 #else
1538         /* search this HBA host */
1539         host = scsi_host_hn_get(hostno);
1540         if (host == NULL) {
1541                 return -ESRCH;
1542         }
1543 #endif
1544         data = (nsp32_hw_data *)host->hostdata;
1545         base = host->io_port;
1546
1547         SPRINTF("NinjaSCSI-32 status\n\n");
1548         SPRINTF("Driver version:        %s, $Revision: 1.33 $\n", nsp32_release_version);
1549         SPRINTF("SCSI host No.:         %d\n",          hostno);
1550         SPRINTF("IRQ:                   %d\n",          host->irq);
1551         SPRINTF("IO:                    0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
1552         SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1);
1553         SPRINTF("sg_tablesize:          %d\n",          host->sg_tablesize);
1554         SPRINTF("Chip revision:         0x%x\n",        (nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
1555
1556         mode_reg = nsp32_index_read1(base, CHIP_MODE);
1557         model    = data->pci_devid->driver_data;
1558
1559 #ifdef CONFIG_PM
1560         SPRINTF("Power Management:      %s\n",          (mode_reg & OPTF) ? "yes" : "no");
1561 #endif
1562         SPRINTF("OEM:                   %ld, %s\n",     (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
1563
1564         spin_lock_irqsave(&(data->Lock), flags);
1565         SPRINTF("CurrentSC:             0x%p\n\n",      data->CurrentSC);
1566         spin_unlock_irqrestore(&(data->Lock), flags);
1567
1568
1569         SPRINTF("SDTR status\n");
1570         for (id = 0; id < ARRAY_SIZE(data->target); id++) {
1571
1572                 SPRINTF("id %d: ", id);
1573
1574                 if (id == host->this_id) {
1575                         SPRINTF("----- NinjaSCSI-32 host adapter\n");
1576                         continue;
1577                 }
1578
1579                 if (data->target[id].sync_flag == SDTR_DONE) {
1580                         if (data->target[id].period == 0            &&
1581                             data->target[id].offset == ASYNC_OFFSET ) {
1582                                 SPRINTF("async");
1583                         } else {
1584                                 SPRINTF(" sync");
1585                         }
1586                 } else {
1587                         SPRINTF(" none");
1588                 }
1589
1590                 if (data->target[id].period != 0) {
1591
1592                         speed = 1000000 / (data->target[id].period * 4);
1593
1594                         SPRINTF(" transfer %d.%dMB/s, offset %d",
1595                                 speed / 1000,
1596                                 speed % 1000,
1597                                 data->target[id].offset
1598                                 );
1599                 }
1600                 SPRINTF("\n");
1601         }
1602
1603
1604         thislength = pos - (buffer + offset);
1605
1606         if(thislength < 0) {
1607                 *start = NULL;
1608                 return 0;
1609         }
1610
1611
1612         thislength = min(thislength, length);
1613         *start = buffer + offset;
1614
1615         return thislength;
1616 }
1617 #undef SPRINTF
1618
1619
1620
1621 /*
1622  * Reset parameters and call scsi_done for data->cur_lunt.
1623  * Be careful setting SCpnt->result = DID_* before calling this function.
1624  */
1625 static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
1626 {
1627         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1628         unsigned int   base = SCpnt->device->host->io_port;
1629
1630         /*
1631          * unmap pci
1632          */
1633         if (SCpnt->request_bufflen == 0) {
1634                 goto skip;
1635         }
1636
1637         if (SCpnt->use_sg) {
1638                 pci_unmap_sg(data->Pci,
1639                              (struct scatterlist *)SCpnt->buffer,
1640                              SCpnt->use_sg, SCpnt->sc_data_direction);
1641         } else {
1642                 pci_unmap_single(data->Pci,
1643                                  (u32)SCpnt->SCp.have_data_in,
1644                                  SCpnt->request_bufflen,
1645                                  SCpnt->sc_data_direction);
1646         }
1647
1648  skip:
1649         /*
1650          * clear TRANSFERCONTROL_BM_START
1651          */
1652         nsp32_write2(base, TRANSFER_CONTROL, 0);
1653         nsp32_write4(base, BM_CNT,           0);
1654
1655         /*
1656          * call scsi_done
1657          */
1658         (*SCpnt->scsi_done)(SCpnt);
1659
1660         /*
1661          * reset parameters
1662          */
1663         data->cur_lunt->SCpnt = NULL;
1664         data->cur_lunt        = NULL;
1665         data->cur_target      = NULL;
1666         data->CurrentSC      = NULL;
1667 }
1668
1669
1670 /*
1671  * Bus Free Occur
1672  *
1673  * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
1674  * with ACK reply when below condition is matched:
1675  *      MsgIn 00: Command Complete.
1676  *      MsgIn 02: Save Data Pointer.
1677  *      MsgIn 04: Diconnect.
1678  * In other case, unexpected BUSFREE is detected.
1679  */
1680 static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
1681 {
1682         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1683         unsigned int base   = SCpnt->device->host->io_port;
1684
1685         nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
1686         show_autophase(execph);
1687
1688         nsp32_write4(base, BM_CNT,           0);
1689         nsp32_write2(base, TRANSFER_CONTROL, 0);
1690
1691         /*
1692          * MsgIn 02: Save Data Pointer
1693          *
1694          * VALID:
1695          *   Save Data Pointer is received. Adjust pointer.
1696          *   
1697          * NO-VALID:
1698          *   SCSI-3 says if Save Data Pointer is not received, then we restart
1699          *   processing and we can't adjust any SCSI data pointer in next data
1700          *   phase.
1701          */
1702         if (execph & MSGIN_02_VALID) {
1703                 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
1704
1705                 /*
1706                  * Check sack_cnt/saved_sack_cnt, then adjust sg table if
1707                  * needed.
1708                  */
1709                 if (!(execph & MSGIN_00_VALID) && 
1710                     ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
1711                         unsigned int sacklen, s_sacklen;
1712
1713                         /*
1714                          * Read SACK count and SAVEDSACK count, then compare.
1715                          */
1716                         sacklen   = nsp32_read4(base, SACK_CNT      );
1717                         s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
1718
1719                         /*
1720                          * If SAVEDSACKCNT == 0, it means SavedDataPointer is
1721                          * come after data transfering.
1722                          */
1723                         if (s_sacklen > 0) {
1724                                 /*
1725                                  * Comparing between sack and savedsack to
1726                                  * check the condition of AutoMsgIn03.
1727                                  *
1728                                  * If they are same, set msgin03 == TRUE,
1729                                  * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
1730                                  * reselection.  On the other hand, if they
1731                                  * aren't same, set msgin03 == FALSE, and
1732                                  * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
1733                                  * reselection.
1734                                  */
1735                                 if (sacklen != s_sacklen) {
1736                                         data->cur_lunt->msgin03 = FALSE;
1737                                 } else {
1738                                         data->cur_lunt->msgin03 = TRUE;
1739                                 }
1740
1741                                 nsp32_adjust_busfree(SCpnt, s_sacklen);
1742                         }
1743                 }
1744
1745                 /* This value has not substitude with valid value yet... */
1746                 //data->cur_lunt->save_datp = data->cur_datp;
1747         } else {
1748                 /*
1749                  * no processing.
1750                  */
1751         }
1752         
1753         if (execph & MSGIN_03_VALID) {
1754                 /* MsgIn03 was valid to be processed. No need processing. */
1755         }
1756
1757         /*
1758          * target SDTR check
1759          */
1760         if (data->cur_target->sync_flag & SDTR_INITIATOR) {
1761                 /*
1762                  * SDTR negotiation pulled by the initiator has not
1763                  * finished yet. Fall back to ASYNC mode.
1764                  */
1765                 nsp32_set_async(data, data->cur_target);
1766                 data->cur_target->sync_flag &= ~SDTR_INITIATOR;
1767                 data->cur_target->sync_flag |= SDTR_DONE;
1768         } else if (data->cur_target->sync_flag & SDTR_TARGET) {
1769                 /*
1770                  * SDTR negotiation pulled by the target has been
1771                  * negotiating.
1772                  */
1773                 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
1774                         /* 
1775                          * If valid message is received, then
1776                          * negotiation is succeeded.
1777                          */
1778                 } else {
1779                         /*
1780                          * On the contrary, if unexpected bus free is
1781                          * occurred, then negotiation is failed. Fall
1782                          * back to ASYNC mode.
1783                          */
1784                         nsp32_set_async(data, data->cur_target);
1785                 }
1786                 data->cur_target->sync_flag &= ~SDTR_TARGET;
1787                 data->cur_target->sync_flag |= SDTR_DONE;
1788         }
1789
1790         /*
1791          * It is always ensured by SCSI standard that initiator
1792          * switches into Bus Free Phase after
1793          * receiving message 00 (Command Complete), 04 (Disconnect).
1794          * It's the reason that processing here is valid.
1795          */
1796         if (execph & MSGIN_00_VALID) {
1797                 /* MsgIn 00: Command Complete */
1798                 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
1799
1800                 SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
1801                 SCpnt->SCp.Message = 0;
1802                 nsp32_dbg(NSP32_DEBUG_BUSFREE, 
1803                           "normal end stat=0x%x resid=0x%x\n",
1804                           SCpnt->SCp.Status, SCpnt->resid);
1805                 SCpnt->result = (DID_OK             << 16) |
1806                                 (SCpnt->SCp.Message <<  8) |
1807                                 (SCpnt->SCp.Status  <<  0);
1808                 nsp32_scsi_done(SCpnt);
1809                 /* All operation is done */
1810                 return TRUE;
1811         } else if (execph & MSGIN_04_VALID) {
1812                 /* MsgIn 04: Disconnect */
1813                 SCpnt->SCp.Status  = nsp32_read1(base, SCSI_CSB_IN);
1814                 SCpnt->SCp.Message = 4;
1815                 
1816                 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
1817                 return TRUE;
1818         } else {
1819                 /* Unexpected bus free */
1820                 nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
1821
1822                 /* DID_ERROR? */
1823                 //SCpnt->result   = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
1824                 SCpnt->result = DID_ERROR << 16;
1825                 nsp32_scsi_done(SCpnt);
1826                 return TRUE;
1827         }
1828         return FALSE;
1829 }
1830
1831
1832 /*
1833  * nsp32_adjust_busfree - adjusting SG table
1834  *
1835  * Note: This driver adjust the SG table using SCSI ACK
1836  *       counter instead of BMCNT counter!
1837  */
1838 static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
1839 {
1840         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1841         int                   old_entry = data->cur_entry;
1842         int                   new_entry;
1843         int                   sg_num = data->cur_lunt->sg_num;
1844         nsp32_sgtable *sgt    = data->cur_lunt->sglun->sgt;
1845         unsigned int          restlen, sentlen;
1846         u32_le                len, addr;
1847
1848         nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", SCpnt->resid);
1849
1850         /* adjust saved SACK count with 4 byte start address boundary */
1851         s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
1852
1853         /*
1854          * calculate new_entry from sack count and each sgt[].len 
1855          * calculate the byte which is intent to send
1856          */
1857         sentlen = 0;
1858         for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
1859                 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
1860                 if (sentlen > s_sacklen) {
1861                         break;
1862                 }
1863         }
1864
1865         /* all sgt is processed */
1866         if (new_entry == sg_num) {
1867                 goto last;
1868         }
1869
1870         if (sentlen == s_sacklen) {
1871                 /* XXX: confirm it's ok or not */
1872                 /* In this case, it's ok because we are at 
1873                    the head element of the sg. restlen is correctly calculated. */
1874         }
1875
1876         /* calculate the rest length for transfering */
1877         restlen = sentlen - s_sacklen;
1878
1879         /* update adjusting current SG table entry */
1880         len  = le32_to_cpu(sgt[new_entry].len);
1881         addr = le32_to_cpu(sgt[new_entry].addr);
1882         addr += (len - restlen);
1883         sgt[new_entry].addr = cpu_to_le32(addr);
1884         sgt[new_entry].len  = cpu_to_le32(restlen);
1885
1886         /* set cur_entry with new_entry */
1887         data->cur_entry = new_entry;
1888  
1889         return;
1890
1891  last:
1892         if (SCpnt->resid < sentlen) {
1893                 nsp32_msg(KERN_ERR, "resid underflow");
1894         }
1895
1896         SCpnt->resid -= sentlen;
1897         nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", SCpnt->resid);
1898
1899         /* update hostdata and lun */
1900
1901         return;
1902 }
1903
1904
1905 /*
1906  * It's called MsgOut phase occur.
1907  * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
1908  * message out phase. It, however, has more than 3 messages,
1909  * HBA creates the interrupt and we have to process by hand.
1910  */
1911 static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
1912 {
1913         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1914         unsigned int base   = SCpnt->device->host->io_port;
1915         //unsigned short command;
1916         long new_sgtp;
1917         int i;
1918         
1919         nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1920                   "enter: msgout_len: 0x%x", data->msgout_len);
1921
1922         /*
1923          * If MsgOut phase is occurred without having any
1924          * message, then No_Operation is sent (SCSI-2).
1925          */
1926         if (data->msgout_len == 0) {
1927                 nsp32_build_nop(SCpnt);
1928         }
1929
1930         /*
1931          * Set SGTP ADDR current entry for restarting AUTOSCSI, 
1932          * because SGTP is incremented next point.
1933          * There is few statement in the specification...
1934          */
1935         new_sgtp = data->cur_lunt->sglun_paddr + 
1936                    (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
1937
1938         /*
1939          * send messages
1940          */
1941         for (i = 0; i < data->msgout_len; i++) {
1942                 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1943                           "%d : 0x%x", i, data->msgoutbuf[i]);
1944
1945                 /*
1946                  * Check REQ is asserted.
1947                  */
1948                 nsp32_wait_req(data, ASSERT);
1949
1950                 if (i == (data->msgout_len - 1)) {
1951                         /*
1952                          * If the last message, set the AutoSCSI restart
1953                          * before send back the ack message. AutoSCSI
1954                          * restart automatically negate ATN signal.
1955                          */
1956                         //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
1957                         //nsp32_restart_autoscsi(SCpnt, command);
1958                         nsp32_write2(base, COMMAND_CONTROL,
1959                                          (CLEAR_CDB_FIFO_POINTER |
1960                                           AUTO_COMMAND_PHASE     |
1961                                           AUTOSCSI_RESTART       |
1962                                           AUTO_MSGIN_00_OR_04    |
1963                                           AUTO_MSGIN_02          ));
1964                 }
1965                 /*
1966                  * Write data with SACK, then wait sack is
1967                  * automatically negated.
1968                  */
1969                 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
1970                 nsp32_wait_sack(data, NEGATE);
1971
1972                 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
1973                           nsp32_read1(base, SCSI_BUS_MONITOR));
1974         };
1975
1976         data->msgout_len = 0;
1977
1978         nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
1979 }
1980
1981 /*
1982  * Restart AutoSCSI
1983  *
1984  * Note: Restarting AutoSCSI needs set:
1985  *              SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
1986  */
1987 static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
1988 {
1989         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1990         unsigned int   base = data->BaseAddress;
1991         unsigned short transfer = 0;
1992
1993         nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
1994
1995         if (data->cur_target == NULL || data->cur_lunt == NULL) {
1996                 nsp32_msg(KERN_ERR, "Target or Lun is invalid");
1997         }
1998
1999         /*
2000          * set SYNC_REG
2001          * Don't set BM_START_ADR before setting this register.
2002          */
2003         nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
2004
2005         /*
2006          * set ACKWIDTH
2007          */
2008         nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
2009
2010         /*
2011          * set SREQ hazard killer sampling rate
2012          */
2013         nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
2014
2015         /*
2016          * set SGT ADDR (physical address)
2017          */
2018         nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
2019
2020         /*
2021          * set TRANSFER CONTROL REG
2022          */
2023         transfer = 0;
2024         transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
2025         if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
2026                 if (SCpnt->request_bufflen > 0) {
2027                         transfer |= BM_START;
2028                 }
2029         } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
2030                 transfer |= CB_MMIO_MODE;
2031         } else if (data->trans_method & NSP32_TRANSFER_PIO) {
2032                 transfer |= CB_IO_MODE;
2033         }
2034         nsp32_write2(base, TRANSFER_CONTROL, transfer);
2035
2036         /*
2037          * restart AutoSCSI
2038          *
2039          * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
2040          */
2041         command |= (CLEAR_CDB_FIFO_POINTER |
2042                     AUTO_COMMAND_PHASE     |
2043                     AUTOSCSI_RESTART       );
2044         nsp32_write2(base, COMMAND_CONTROL, command);
2045
2046         nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
2047 }
2048
2049
2050 /*
2051  * cannot run automatically message in occur
2052  */
2053 static void nsp32_msgin_occur(struct scsi_cmnd     *SCpnt,
2054                               unsigned long  irq_status,
2055                               unsigned short execph)
2056 {
2057         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2058         unsigned int   base = SCpnt->device->host->io_port;
2059         unsigned char  msg;
2060         unsigned char  msgtype;
2061         unsigned char  newlun;
2062         unsigned short command  = 0;
2063         int            msgclear = TRUE;
2064         long           new_sgtp;
2065         int            ret;
2066
2067         /*
2068          * read first message
2069          *    Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
2070          *    of Message-In have to be processed before sending back SCSI ACK.
2071          */
2072         msg = nsp32_read1(base, SCSI_DATA_IN);
2073         data->msginbuf[(unsigned char)data->msgin_len] = msg;
2074         msgtype = data->msginbuf[0];
2075         nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
2076                   "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
2077                   data->msgin_len, msg, msgtype);
2078
2079         /*
2080          * TODO: We need checking whether bus phase is message in?
2081          */
2082
2083         /*
2084          * assert SCSI ACK
2085          */
2086         nsp32_sack_assert(data);
2087
2088         /*
2089          * processing IDENTIFY
2090          */
2091         if (msgtype & 0x80) {
2092                 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
2093                         /* Invalid (non reselect) phase */
2094                         goto reject;
2095                 }
2096
2097                 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
2098                 ret = nsp32_reselection(SCpnt, newlun);
2099                 if (ret == TRUE) {
2100                         goto restart;
2101                 } else {
2102                         goto reject;
2103                 }
2104         }
2105         
2106         /*
2107          * processing messages except for IDENTIFY
2108          *
2109          * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
2110          */
2111         switch (msgtype) {
2112         /*
2113          * 1-byte message
2114          */
2115         case COMMAND_COMPLETE:
2116         case DISCONNECT:
2117                 /*
2118                  * These messages should not be occurred.
2119                  * They should be processed on AutoSCSI sequencer.
2120                  */
2121                 nsp32_msg(KERN_WARNING, 
2122                            "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
2123                 break;
2124                 
2125         case RESTORE_POINTERS:
2126                 /*
2127                  * AutoMsgIn03 is disabled, and HBA gets this message.
2128                  */
2129
2130                 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
2131                         unsigned int s_sacklen;
2132
2133                         s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
2134                         if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
2135                                 nsp32_adjust_busfree(SCpnt, s_sacklen);
2136                         } else {
2137                                 /* No need to rewrite SGT */
2138                         }
2139                 }
2140                 data->cur_lunt->msgin03 = FALSE;
2141
2142                 /* Update with the new value */
2143
2144                 /* reset SACK/SavedACK counter (or ALL clear?) */
2145                 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
2146
2147                 /*
2148                  * set new sg pointer
2149                  */
2150                 new_sgtp = data->cur_lunt->sglun_paddr + 
2151                         (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
2152                 nsp32_write4(base, SGT_ADR, new_sgtp);
2153
2154                 break;
2155
2156         case SAVE_POINTERS:
2157                 /*
2158                  * These messages should not be occurred.
2159                  * They should be processed on AutoSCSI sequencer.
2160                  */
2161                 nsp32_msg (KERN_WARNING, 
2162                            "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
2163                 
2164                 break;
2165                 
2166         case MESSAGE_REJECT:
2167                 /* If previous message_out is sending SDTR, and get 
2168                    message_reject from target, SDTR negotiation is failed */
2169                 if (data->cur_target->sync_flag &
2170                                 (SDTR_INITIATOR | SDTR_TARGET)) {
2171                         /*
2172                          * Current target is negotiating SDTR, but it's
2173                          * failed.  Fall back to async transfer mode, and set
2174                          * SDTR_DONE.
2175                          */
2176                         nsp32_set_async(data, data->cur_target);
2177                         data->cur_target->sync_flag &= ~SDTR_INITIATOR;
2178                         data->cur_target->sync_flag |= SDTR_DONE;
2179
2180                 }
2181                 break;
2182
2183         case LINKED_CMD_COMPLETE:
2184         case LINKED_FLG_CMD_COMPLETE:
2185                 /* queue tag is not supported currently */
2186                 nsp32_msg (KERN_WARNING, 
2187                            "unsupported message: 0x%x", msgtype);
2188                 break;
2189
2190         case INITIATE_RECOVERY:
2191                 /* staring ECA (Extended Contingent Allegiance) state. */
2192                 /* This message is declined in SPI2 or later. */
2193
2194                 goto reject;
2195
2196         /*
2197          * 2-byte message
2198          */
2199         case SIMPLE_QUEUE_TAG:
2200         case 0x23:
2201                 /*
2202                  * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
2203                  * No support is needed.
2204                  */
2205                 if (data->msgin_len >= 1) {
2206                         goto reject;
2207                 }
2208
2209                 /* current position is 1-byte of 2 byte */
2210                 msgclear = FALSE;
2211
2212                 break;
2213
2214         /*
2215          * extended message
2216          */
2217         case EXTENDED_MESSAGE:
2218                 if (data->msgin_len < 1) {
2219                         /*
2220                          * Current position does not reach 2-byte
2221                          * (2-byte is extended message length).
2222                          */
2223                         msgclear = FALSE;
2224                         break;
2225                 }
2226
2227                 if ((data->msginbuf[1] + 1) > data->msgin_len) {
2228                         /*
2229                          * Current extended message has msginbuf[1] + 2
2230                          * (msgin_len starts counting from 0, so buf[1] + 1).
2231                          * If current message position is not finished,
2232                          * continue receiving message.
2233                          */
2234                         msgclear = FALSE;
2235                         break;
2236                 }
2237
2238                 /*
2239                  * Reach here means regular length of each type of 
2240                  * extended messages.
2241                  */
2242                 switch (data->msginbuf[2]) {
2243                 case EXTENDED_MODIFY_DATA_POINTER:
2244                         /* TODO */
2245                         goto reject; /* not implemented yet */
2246                         break;
2247
2248                 case EXTENDED_SDTR:
2249                         /*
2250                          * Exchange this message between initiator and target.
2251                          */
2252                         if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
2253                                 /*
2254                                  * received inappropriate message.
2255                                  */
2256                                 goto reject;
2257                                 break;
2258                         }
2259
2260                         nsp32_analyze_sdtr(SCpnt);
2261
2262                         break;
2263
2264                 case EXTENDED_EXTENDED_IDENTIFY:
2265                         /* SCSI-I only, not supported. */
2266                         goto reject; /* not implemented yet */
2267
2268                         break;
2269
2270                 case EXTENDED_WDTR:
2271                         goto reject; /* not implemented yet */
2272
2273                         break;
2274                         
2275                 default:
2276                         goto reject;
2277                 }
2278                 break;
2279                 
2280         default:
2281                 goto reject;
2282         }
2283
2284  restart:
2285         if (msgclear == TRUE) {
2286                 data->msgin_len = 0;
2287
2288                 /*
2289                  * If restarting AutoSCSI, but there are some message to out
2290                  * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
2291                  * (MV_VALID = 0). When commandcontrol is written with
2292                  * AutoSCSI restart, at the same time MsgOutOccur should be
2293                  * happened (however, such situation is really possible...?).
2294                  */
2295                 if (data->msgout_len > 0) {     
2296                         nsp32_write4(base, SCSI_MSG_OUT, 0);
2297                         command |= AUTO_ATN;
2298                 }
2299
2300                 /*
2301                  * restart AutoSCSI
2302                  * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
2303                  */
2304                 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
2305
2306                 /*
2307                  * If current msgin03 is TRUE, then flag on.
2308                  */
2309                 if (data->cur_lunt->msgin03 == TRUE) {
2310                         command |= AUTO_MSGIN_03;
2311                 }
2312                 data->cur_lunt->msgin03 = FALSE;
2313         } else {
2314                 data->msgin_len++;
2315         }
2316
2317         /*
2318          * restart AutoSCSI
2319          */
2320         nsp32_restart_autoscsi(SCpnt, command);
2321
2322         /*
2323          * wait SCSI REQ negate for REQ-ACK handshake
2324          */
2325         nsp32_wait_req(data, NEGATE);
2326
2327         /*
2328          * negate SCSI ACK
2329          */
2330         nsp32_sack_negate(data);
2331
2332         nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2333
2334         return;
2335
2336  reject:
2337         nsp32_msg(KERN_WARNING, 
2338                   "invalid or unsupported MessageIn, rejected. "
2339                   "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
2340                   msg, data->msgin_len, msgtype);
2341         nsp32_build_reject(SCpnt);
2342         data->msgin_len = 0;
2343
2344         goto restart;
2345 }
2346
2347 /*
2348  * 
2349  */
2350 static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
2351 {
2352         nsp32_hw_data   *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2353         nsp32_target     *target     = data->cur_target;
2354         nsp32_sync_table *synct;
2355         unsigned char     get_period = data->msginbuf[3];
2356         unsigned char     get_offset = data->msginbuf[4];
2357         int               entry;
2358         int               syncnum;
2359
2360         nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
2361
2362         synct   = data->synct;
2363         syncnum = data->syncnum;
2364
2365         /*
2366          * If this inititor sent the SDTR message, then target responds SDTR,
2367          * initiator SYNCREG, ACKWIDTH from SDTR parameter.
2368          * Messages are not appropriate, then send back reject message.
2369          * If initiator did not send the SDTR, but target sends SDTR, 
2370          * initiator calculator the appropriate parameter and send back SDTR.
2371          */     
2372         if (target->sync_flag & SDTR_INITIATOR) {
2373                 /*
2374                  * Initiator sent SDTR, the target responds and
2375                  * send back negotiation SDTR.
2376                  */
2377                 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
2378         
2379                 target->sync_flag &= ~SDTR_INITIATOR;
2380                 target->sync_flag |= SDTR_DONE;
2381
2382                 /*
2383                  * offset:
2384                  */
2385                 if (get_offset > SYNC_OFFSET) {
2386                         /*
2387                          * Negotiation is failed, the target send back
2388                          * unexpected offset value.
2389                          */
2390                         goto reject;
2391                 }
2392                 
2393                 if (get_offset == ASYNC_OFFSET) {
2394                         /*
2395                          * Negotiation is succeeded, the target want
2396                          * to fall back into asynchronous transfer mode.
2397                          */
2398                         goto async;
2399                 }
2400
2401                 /*
2402                  * period:
2403                  *    Check whether sync period is too short. If too short,
2404                  *    fall back to async mode. If it's ok, then investigate
2405                  *    the received sync period. If sync period is acceptable
2406                  *    between sync table start_period and end_period, then
2407                  *    set this I_T nexus as sent offset and period.
2408                  *    If it's not acceptable, send back reject and fall back
2409                  *    to async mode.
2410                  */
2411                 if (get_period < data->synct[0].period_num) {
2412                         /*
2413                          * Negotiation is failed, the target send back
2414                          * unexpected period value.
2415                          */
2416                         goto reject;
2417                 }
2418
2419                 entry = nsp32_search_period_entry(data, target, get_period);
2420
2421                 if (entry < 0) {
2422                         /*
2423                          * Target want to use long period which is not 
2424                          * acceptable NinjaSCSI-32Bi/UDE.
2425                          */
2426                         goto reject;
2427                 }
2428
2429                 /*
2430                  * Set new sync table and offset in this I_T nexus.
2431                  */
2432                 nsp32_set_sync_entry(data, target, entry, get_offset);
2433         } else {
2434                 /* Target send SDTR to initiator. */
2435                 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
2436         
2437                 target->sync_flag |= SDTR_INITIATOR;
2438
2439                 /* offset: */
2440                 if (get_offset > SYNC_OFFSET) {
2441                         /* send back as SYNC_OFFSET */
2442                         get_offset = SYNC_OFFSET;
2443                 }
2444
2445                 /* period: */
2446                 if (get_period < data->synct[0].period_num) {
2447                         get_period = data->synct[0].period_num;
2448                 }
2449
2450                 entry = nsp32_search_period_entry(data, target, get_period);
2451
2452                 if (get_offset == ASYNC_OFFSET || entry < 0) {
2453                         nsp32_set_async(data, target);
2454                         nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
2455                 } else {
2456                         nsp32_set_sync_entry(data, target, entry, get_offset);
2457                         nsp32_build_sdtr(SCpnt, get_period, get_offset);
2458                 }
2459         }
2460
2461         target->period = get_period;
2462         nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2463         return;
2464
2465  reject:
2466         /*
2467          * If the current message is unacceptable, send back to the target
2468          * with reject message.
2469          */
2470         nsp32_build_reject(SCpnt);
2471
2472  async:
2473         nsp32_set_async(data, target);  /* set as ASYNC transfer mode */
2474
2475         target->period = 0;
2476         nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
2477         return;
2478 }
2479
2480
2481 /*
2482  * Search config entry number matched in sync_table from given
2483  * target and speed period value. If failed to search, return negative value.
2484  */
2485 static int nsp32_search_period_entry(nsp32_hw_data *data,
2486                                      nsp32_target  *target,
2487                                      unsigned char  period)
2488 {
2489         int i;
2490
2491         if (target->limit_entry >= data->syncnum) {
2492                 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
2493                 target->limit_entry = 0;
2494         }
2495
2496         for (i = target->limit_entry; i < data->syncnum; i++) {
2497                 if (period >= data->synct[i].start_period &&
2498                     period <= data->synct[i].end_period) {
2499                                 break;
2500                 }
2501         }
2502
2503         /*
2504          * Check given period value is over the sync_table value.
2505          * If so, return max value.
2506          */
2507         if (i == data->syncnum) {
2508                 i = -1;
2509         }
2510
2511         return i;
2512 }
2513
2514
2515 /*
2516  * target <-> initiator use ASYNC transfer
2517  */
2518 static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
2519 {
2520         unsigned char period = data->synct[target->limit_entry].period_num;
2521
2522         target->offset     = ASYNC_OFFSET;
2523         target->period     = 0;
2524         target->syncreg    = TO_SYNCREG(period, ASYNC_OFFSET);
2525         target->ackwidth   = 0;
2526         target->sample_reg = 0;
2527
2528         nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
2529 }
2530
2531
2532 /*
2533  * target <-> initiator use maximum SYNC transfer
2534  */
2535 static void nsp32_set_max_sync(nsp32_hw_data *data,
2536                                nsp32_target  *target,
2537                                unsigned char *period,
2538                                unsigned char *offset)
2539 {
2540         unsigned char period_num, ackwidth;
2541
2542         period_num = data->synct[target->limit_entry].period_num;
2543         *period    = data->synct[target->limit_entry].start_period;
2544         ackwidth   = data->synct[target->limit_entry].ackwidth;
2545         *offset    = SYNC_OFFSET;
2546
2547         target->syncreg    = TO_SYNCREG(period_num, *offset);
2548         target->ackwidth   = ackwidth;
2549         target->offset     = *offset;
2550         target->sample_reg = 0;       /* disable SREQ sampling */
2551 }
2552
2553
2554 /*
2555  * target <-> initiator use entry number speed
2556  */
2557 static void nsp32_set_sync_entry(nsp32_hw_data *data,
2558                                  nsp32_target  *target,
2559                                  int            entry,
2560                                  unsigned char  offset)
2561 {
2562         unsigned char period, ackwidth, sample_rate;
2563
2564         period      = data->synct[entry].period_num;
2565         ackwidth    = data->synct[entry].ackwidth;
2566         offset      = offset;
2567         sample_rate = data->synct[entry].sample_rate;
2568
2569         target->syncreg    = TO_SYNCREG(period, offset);
2570         target->ackwidth   = ackwidth;
2571         target->offset     = offset;
2572         target->sample_reg = sample_rate | SAMPLING_ENABLE;
2573
2574         nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
2575 }
2576
2577
2578 /*
2579  * It waits until SCSI REQ becomes assertion or negation state.
2580  *
2581  * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
2582  *     connected target responds SCSI REQ negation.  We have to wait
2583  *     SCSI REQ becomes negation in order to negate SCSI ACK signal for
2584  *     REQ-ACK handshake.
2585  */
2586 static void nsp32_wait_req(nsp32_hw_data *data, int state)
2587 {
2588         unsigned int  base      = data->BaseAddress;
2589         int           wait_time = 0;
2590         unsigned char bus, req_bit;
2591
2592         if (!((state == ASSERT) || (state == NEGATE))) {
2593                 nsp32_msg(KERN_ERR, "unknown state designation");
2594         }
2595         /* REQ is BIT(5) */
2596         req_bit = (state == ASSERT ? BUSMON_REQ : 0);
2597
2598         do {
2599                 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2600                 if ((bus & BUSMON_REQ) == req_bit) {
2601                         nsp32_dbg(NSP32_DEBUG_WAIT, 
2602                                   "wait_time: %d", wait_time);
2603                         return;
2604                 }
2605                 udelay(1);
2606                 wait_time++;
2607         } while (wait_time < REQSACK_TIMEOUT_TIME);
2608
2609         nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
2610 }
2611
2612 /*
2613  * It waits until SCSI SACK becomes assertion or negation state.
2614  */
2615 static void nsp32_wait_sack(nsp32_hw_data *data, int state)
2616 {
2617         unsigned int  base      = data->BaseAddress;
2618         int           wait_time = 0;
2619         unsigned char bus, ack_bit;
2620
2621         if (!((state == ASSERT) || (state == NEGATE))) {
2622                 nsp32_msg(KERN_ERR, "unknown state designation");
2623         }
2624         /* ACK is BIT(4) */
2625         ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
2626
2627         do {
2628                 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2629                 if ((bus & BUSMON_ACK) == ack_bit) {
2630                         nsp32_dbg(NSP32_DEBUG_WAIT,
2631                                   "wait_time: %d", wait_time);
2632                         return;
2633                 }
2634                 udelay(1);
2635                 wait_time++;
2636         } while (wait_time < REQSACK_TIMEOUT_TIME);
2637
2638         nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
2639 }
2640
2641 /*
2642  * assert SCSI ACK
2643  *
2644  * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
2645  */
2646 static void nsp32_sack_assert(nsp32_hw_data *data)
2647 {
2648         unsigned int  base = data->BaseAddress;
2649         unsigned char busctrl;
2650
2651         busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
2652         busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
2653         nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2654 }
2655
2656 /*
2657  * negate SCSI ACK
2658  */
2659 static void nsp32_sack_negate(nsp32_hw_data *data)
2660 {
2661         unsigned int  base = data->BaseAddress;
2662         unsigned char busctrl;
2663
2664         busctrl  = nsp32_read1(base, SCSI_BUS_CONTROL);
2665         busctrl &= ~BUSCTL_ACK;
2666         nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2667 }
2668
2669
2670
2671 /*
2672  * Note: n_io_port is defined as 0x7f because I/O register port is
2673  *       assigned as:
2674  *      0x800-0x8ff: memory mapped I/O port
2675  *      0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
2676  *      0xc00-0xfff: CardBus status registers
2677  */
2678 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2679 #define DETECT_OK 0
2680 #define DETECT_NG 1
2681 #define PCIDEV    pdev
2682 static int nsp32_detect(struct pci_dev *pdev)
2683 #else
2684 #define DETECT_OK 1
2685 #define DETECT_NG 0
2686 #define PCIDEV    (data->Pci)
2687 static int nsp32_detect(Scsi_Host_Template *sht)
2688 #endif
2689 {
2690         struct Scsi_Host *host; /* registered host structure */
2691         struct resource  *res;
2692         nsp32_hw_data    *data;
2693         int               ret;
2694         int               i, j;
2695
2696         nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
2697
2698         /*
2699          * register this HBA as SCSI device
2700          */
2701 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2702         host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
2703 #else
2704         host = scsi_register(sht, sizeof(nsp32_hw_data));
2705 #endif
2706         if (host == NULL) {
2707                 nsp32_msg (KERN_ERR, "failed to scsi register");
2708                 goto err;
2709         }
2710
2711         /*
2712          * set nsp32_hw_data
2713          */
2714         data = (nsp32_hw_data *)host->hostdata;
2715
2716         memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
2717
2718         host->irq       = data->IrqNumber;
2719         host->io_port   = data->BaseAddress;
2720         host->unique_id = data->BaseAddress;
2721         host->n_io_port = data->NumAddress;
2722         host->base      = (unsigned long)data->MmioAddress;
2723 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,63))
2724         scsi_set_device(host, &PCIDEV->dev);
2725 #else
2726         scsi_set_pci_device(host, PCIDEV);
2727 #endif
2728
2729         data->Host      = host;
2730         spin_lock_init(&(data->Lock));
2731
2732         data->cur_lunt   = NULL;
2733         data->cur_target = NULL;
2734
2735         /*
2736          * Bus master transfer mode is supported currently.
2737          */
2738         data->trans_method = NSP32_TRANSFER_BUSMASTER;
2739
2740         /*
2741          * Set clock div, CLOCK_4 (HBA has own external clock, and
2742          * dividing * 100ns/4).
2743          * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
2744          */
2745         data->clock = CLOCK_4;
2746
2747         /*
2748          * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
2749          */
2750         switch (data->clock) {
2751         case CLOCK_4:
2752                 /* If data->clock is CLOCK_4, then select 40M sync table. */
2753                 data->synct   = nsp32_sync_table_40M;
2754                 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2755                 break;
2756         case CLOCK_2:
2757                 /* If data->clock is CLOCK_2, then select 20M sync table. */
2758                 data->synct   = nsp32_sync_table_20M;
2759                 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
2760                 break;
2761         case PCICLK:
2762                 /* If data->clock is PCICLK, then select pci sync table. */
2763                 data->synct   = nsp32_sync_table_pci;
2764                 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
2765                 break;
2766         default:
2767                 nsp32_msg(KERN_WARNING,
2768                           "Invalid clock div is selected, set CLOCK_4.");
2769                 /* Use default value CLOCK_4 */
2770                 data->clock   = CLOCK_4;
2771                 data->synct   = nsp32_sync_table_40M;
2772                 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2773         }
2774
2775         /*
2776          * setup nsp32_lunt
2777          */
2778
2779         /*
2780          * setup DMA 
2781          */
2782         if (pci_set_dma_mask(PCIDEV, 0xffffffffUL) != 0) {
2783                 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
2784                 goto scsi_unregister;
2785         }
2786
2787         /*
2788          * allocate autoparam DMA resource.
2789          */
2790         data->autoparam = pci_alloc_consistent(PCIDEV, sizeof(nsp32_autoparam), &(data->auto_paddr));
2791         if (data->autoparam == NULL) {
2792                 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2793                 goto scsi_unregister;
2794         }
2795
2796         /*
2797          * allocate scatter-gather DMA resource.
2798          */
2799         data->sg_list = pci_alloc_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
2800                                              &(data->sg_paddr));
2801         if (data->sg_list == NULL) {
2802                 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2803                 goto free_autoparam;
2804         }
2805
2806         for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
2807                 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
2808                         int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
2809                         nsp32_lunt tmp = {
2810                                 .SCpnt       = NULL,
2811                                 .save_datp   = 0,
2812                                 .msgin03     = FALSE,
2813                                 .sg_num      = 0,
2814                                 .cur_entry   = 0,
2815                                 .sglun       = &(data->sg_list[offset]),
2816                                 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
2817                         };
2818
2819                         data->lunt[i][j] = tmp;
2820                 }
2821         }
2822
2823         /*
2824          * setup target
2825          */
2826         for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2827                 nsp32_target *target = &(data->target[i]);
2828
2829                 target->limit_entry  = 0;
2830                 target->sync_flag    = 0;
2831                 nsp32_set_async(data, target);
2832         }
2833
2834         /*
2835          * EEPROM check
2836          */
2837         ret = nsp32_getprom_param(data);
2838         if (ret == FALSE) {
2839                 data->resettime = 3;    /* default 3 */
2840         }
2841
2842         /*
2843          * setup HBA
2844          */
2845         nsp32hw_init(data);
2846
2847         snprintf(data->info_str, sizeof(data->info_str),
2848                  "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
2849                  host->irq, host->io_port, host->n_io_port);
2850
2851         /*
2852          * SCSI bus reset
2853          *
2854          * Note: It's important to reset SCSI bus in initialization phase.
2855          *     NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
2856          *     system is coming up, so SCSI devices connected to HBA is set as
2857          *     un-asynchronous mode.  It brings the merit that this HBA is
2858          *     ready to start synchronous transfer without any preparation,
2859          *     but we are difficult to control transfer speed.  In addition,
2860          *     it prevents device transfer speed from effecting EEPROM start-up
2861          *     SDTR.  NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
2862          *     Auto Mode, then FAST-10M is selected when SCSI devices are
2863          *     connected same or more than 4 devices.  It should be avoided
2864          *     depending on this specification. Thus, resetting the SCSI bus
2865          *     restores all connected SCSI devices to asynchronous mode, then
2866          *     this driver set SDTR safely later, and we can control all SCSI
2867          *     device transfer mode.
2868          */
2869         nsp32_do_bus_reset(data);
2870
2871         ret = request_irq(host->irq, do_nsp32_isr,
2872                           SA_SHIRQ | SA_SAMPLE_RANDOM, "nsp32", data);
2873         if (ret < 0) {
2874                 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
2875                           "SCSI PCI controller. Interrupt: %d", host->irq);
2876                 goto free_sg_list;
2877         }
2878
2879         /*
2880          * PCI IO register
2881          */
2882         res = request_region(host->io_port, host->n_io_port, "nsp32");
2883         if (res == NULL) {
2884                 nsp32_msg(KERN_ERR, 
2885                           "I/O region 0x%lx+0x%lx is already used",
2886                           data->BaseAddress, data->NumAddress);
2887                 goto free_irq;
2888         }
2889
2890 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2891         scsi_add_host (host, &PCIDEV->dev);
2892         scsi_scan_host(host);
2893 #endif
2894         pci_set_drvdata(PCIDEV, host);
2895         return DETECT_OK;
2896
2897  free_irq:
2898         free_irq(host->irq, data);
2899
2900  free_sg_list:
2901         pci_free_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
2902                             data->sg_list, data->sg_paddr);
2903
2904  free_autoparam:
2905         pci_free_consistent(PCIDEV, sizeof(nsp32_autoparam),
2906                             data->autoparam, data->auto_paddr);
2907         
2908  scsi_unregister:
2909         scsi_host_put(host);
2910
2911  err:
2912         return DETECT_NG;
2913 }
2914 #undef DETECT_OK
2915 #undef DETECT_NG
2916 #undef PCIDEV
2917
2918 static int nsp32_release(struct Scsi_Host *host)
2919 {
2920         nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
2921
2922         if (data->autoparam) {
2923                 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
2924                                     data->autoparam, data->auto_paddr);
2925         }
2926
2927         if (data->sg_list) {
2928                 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
2929                                     data->sg_list, data->sg_paddr);
2930         }
2931
2932         if (host->irq) {
2933                 free_irq(host->irq, data);
2934         }
2935
2936         if (host->io_port && host->n_io_port) {
2937                 release_region(host->io_port, host->n_io_port);
2938         }
2939
2940         if (data->MmioAddress) {
2941                 iounmap(data->MmioAddress);
2942         }
2943
2944         return 0;
2945 }
2946
2947 static const char *nsp32_info(struct Scsi_Host *shpnt)
2948 {
2949         nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
2950
2951         return data->info_str;
2952 }
2953
2954
2955 /****************************************************************************
2956  * error handler
2957  */
2958 static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
2959 {
2960         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2961         unsigned int   base = SCpnt->device->host->io_port;
2962
2963         nsp32_msg(KERN_WARNING, "abort");
2964
2965         if (data->cur_lunt->SCpnt == NULL) {
2966                 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
2967                 return FAILED;
2968         }
2969
2970         if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
2971                 /* reset SDTR negotiation */
2972                 data->cur_target->sync_flag = 0;
2973                 nsp32_set_async(data, data->cur_target);
2974         }
2975
2976         nsp32_write2(base, TRANSFER_CONTROL, 0);
2977         nsp32_write2(base, BM_CNT,           0);
2978
2979         SCpnt->result = DID_ABORT << 16;
2980         nsp32_scsi_done(SCpnt);
2981
2982         nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
2983         return SUCCESS;
2984 }
2985
2986 static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
2987 {
2988         nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2989         unsigned int   base = SCpnt->device->host->io_port;
2990
2991         nsp32_msg(KERN_INFO, "Bus Reset");      
2992         nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2993
2994         nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2995         nsp32_do_bus_reset(data);
2996         nsp32_write2(base, IRQ_CONTROL, 0);
2997
2998         return SUCCESS; /* SCSI bus reset is succeeded at any time. */
2999 }
3000
3001 static void nsp32_do_bus_reset(nsp32_hw_data *data)
3002 {
3003         unsigned int   base = data->BaseAddress;
3004         unsigned short intrdat;
3005         int i;
3006
3007         nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
3008
3009         /*
3010          * stop all transfer
3011          * clear TRANSFERCONTROL_BM_START
3012          * clear counter
3013          */
3014         nsp32_write2(base, TRANSFER_CONTROL, 0);
3015         nsp32_write4(base, BM_CNT,           0);
3016         nsp32_write4(base, CLR_COUNTER,      CLRCOUNTER_ALLMASK);
3017
3018         /*
3019          * fall back to asynchronous transfer mode
3020          * initialize SDTR negotiation flag
3021          */
3022         for (i = 0; i < ARRAY_SIZE(data->target); i++) {
3023                 nsp32_target *target = &data->target[i];
3024
3025                 target->sync_flag = 0;
3026                 nsp32_set_async(data, target);
3027         }
3028
3029         /*
3030          * reset SCSI bus
3031          */
3032         nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
3033         udelay(RESET_HOLD_TIME);
3034         nsp32_write1(base, SCSI_BUS_CONTROL, 0);
3035         for(i = 0; i < 5; i++) {
3036                 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
3037                 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
3038         }
3039
3040         data->CurrentSC = NULL;
3041 }
3042
3043 static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
3044 {
3045         struct Scsi_Host *host = SCpnt->device->host;
3046         unsigned int      base = SCpnt->device->host->io_port;
3047         nsp32_hw_data    *data = (nsp32_hw_data *)host->hostdata;
3048
3049         nsp32_msg(KERN_INFO, "Host Reset");     
3050         nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
3051
3052         nsp32hw_init(data);
3053         nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
3054         nsp32_do_bus_reset(data);
3055         nsp32_write2(base, IRQ_CONTROL, 0);
3056
3057         return SUCCESS; /* Host reset is succeeded at any time. */
3058 }
3059
3060
3061 /**************************************************************************
3062  * EEPROM handler
3063  */
3064
3065 /*
3066  * getting EEPROM parameter
3067  */
3068 static int nsp32_getprom_param(nsp32_hw_data *data)
3069 {
3070         int vendor = data->pci_devid->vendor;
3071         int device = data->pci_devid->device;
3072         int ret, val, i;
3073
3074         /*
3075          * EEPROM checking.
3076          */
3077         ret = nsp32_prom_read(data, 0x7e);
3078         if (ret != 0x55) {
3079                 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
3080                 return FALSE;
3081         }
3082         ret = nsp32_prom_read(data, 0x7f);
3083         if (ret != 0xaa) {
3084                 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
3085                 return FALSE;
3086         }
3087
3088         /*
3089          * check EEPROM type
3090          */
3091         if (vendor == PCI_VENDOR_ID_WORKBIT &&
3092             device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
3093                 ret = nsp32_getprom_c16(data);
3094         } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
3095                    device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
3096                 ret = nsp32_getprom_at24(data);
3097         } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
3098                    device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
3099                 ret = nsp32_getprom_at24(data);
3100         } else {
3101                 nsp32_msg(KERN_WARNING, "Unknown EEPROM");
3102                 ret = FALSE;
3103         }
3104
3105         /* for debug : SPROM data full checking */
3106         for (i = 0; i <= 0x1f; i++) {
3107                 val = nsp32_prom_read(data, i);
3108                 nsp32_dbg(NSP32_DEBUG_EEPROM,
3109                           "rom address 0x%x : 0x%x", i, val);
3110         }
3111
3112         return ret;
3113 }
3114
3115
3116 /*
3117  * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
3118  *
3119  *   ROMADDR
3120  *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
3121  *                      Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
3122  *   0x07        :  HBA Synchronous Transfer Period
3123  *                      Value 0: AutoSync, 1: Manual Setting
3124  *   0x08 - 0x0f :  Not Used? (0x0)
3125  *   0x10        :  Bus Termination
3126  *                      Value 0: Auto[ON], 1: ON, 2: OFF
3127  *   0x11        :  Not Used? (0)
3128  *   0x12        :  Bus Reset Delay Time (0x03)
3129  *   0x13        :  Bootable CD Support
3130  *                      Value 0: Disable, 1: Enable
3131  *   0x14        :  Device Scan
3132  *                      Bit   7  6  5  4  3  2  1  0
3133  *                            |  <----------------->
3134  *                            |    SCSI ID: Value 0: Skip, 1: YES
3135  *                            |->  Value 0: ALL scan,  Value 1: Manual
3136  *   0x15 - 0x1b :  Not Used? (0)
3137  *   0x1c        :  Constant? (0x01) (clock div?)
3138  *   0x1d - 0x7c :  Not Used (0xff)
3139  *   0x7d        :  Not Used? (0xff)
3140  *   0x7e        :  Constant (0x55), Validity signature
3141  *   0x7f        :  Constant (0xaa), Validity signature
3142  */
3143 static int nsp32_getprom_at24(nsp32_hw_data *data)
3144 {
3145         int           ret, i;
3146         int           auto_sync;
3147         nsp32_target *target;
3148         int           entry;
3149
3150         /*
3151          * Reset time which is designated by EEPROM.
3152          *
3153          * TODO: Not used yet.
3154          */
3155         data->resettime = nsp32_prom_read(data, 0x12);
3156
3157         /*
3158          * HBA Synchronous Transfer Period
3159          *
3160          * Note: auto_sync = 0: auto, 1: manual.  Ninja SCSI HBA spec says
3161          *      that if auto_sync is 0 (auto), and connected SCSI devices are
3162          *      same or lower than 3, then transfer speed is set as ULTRA-20M.
3163          *      On the contrary if connected SCSI devices are same or higher
3164          *      than 4, then transfer speed is set as FAST-10M.
3165          *
3166          *      I break this rule. The number of connected SCSI devices are
3167          *      only ignored. If auto_sync is 0 (auto), then transfer speed is
3168          *      forced as ULTRA-20M.
3169          */
3170         ret = nsp32_prom_read(data, 0x07);
3171         switch (ret) {
3172         case 0:
3173                 auto_sync = TRUE;
3174                 break;
3175         case 1:
3176                 auto_sync = FALSE;
3177                 break;
3178         default:
3179                 nsp32_msg(KERN_WARNING,
3180                           "Unsupported Auto Sync mode. Fall back to manual mode.");
3181                 auto_sync = TRUE;
3182         }
3183
3184         if (trans_mode == ULTRA20M_MODE) {
3185                 auto_sync = TRUE;
3186         }
3187
3188         /*
3189          * each device Synchronous Transfer Period
3190          */
3191         for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3192                 target = &data->target[i];
3193                 if (auto_sync == TRUE) {
3194                         target->limit_entry = 0;   /* set as ULTRA20M */
3195                 } else {
3196                         ret   = nsp32_prom_read(data, i);
3197                         entry = nsp32_search_period_entry(data, target, ret);
3198                         if (entry < 0) {
3199                                 /* search failed... set maximum speed */
3200                                 entry = 0;
3201                         }
3202                         target->limit_entry = entry;
3203                 }
3204         }
3205
3206         return TRUE;
3207 }
3208
3209
3210 /*
3211  * C16 110 (I-O Data: SC-NBD) data map:
3212  *
3213  *   ROMADDR
3214  *   0x00 - 0x06 :  Device Synchronous Transfer Period (SCSI ID 0 - 6) 
3215  *                      Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
3216  *   0x07        :  0 (HBA Synchronous Transfer Period: Auto Sync)
3217  *   0x08 - 0x0f :  Not Used? (0x0)
3218  *   0x10        :  Transfer Mode
3219  *                      Value 0: PIO, 1: Busmater
3220  *   0x11        :  Bus Reset Delay Time (0x00-0x20)
3221  *   0x12        :  Bus Termination
3222  *                      Value 0: Disable, 1: Enable
3223  *   0x13 - 0x19 :  Disconnection
3224  *                      Value 0: Disable, 1: Enable
3225  *   0x1a - 0x7c :  Not Used? (0)
3226  *   0x7d        :  Not Used? (0xf8)
3227  *   0x7e        :  Constant (0x55), Validity signature
3228  *   0x7f        :  Constant (0xaa), Validity signature
3229  */
3230 static int nsp32_getprom_c16(nsp32_hw_data *data)
3231 {
3232         int           ret, i;
3233         nsp32_target *target;
3234         int           entry, val;
3235
3236         /*
3237          * Reset time which is designated by EEPROM.
3238          *
3239          * TODO: Not used yet.
3240          */
3241         data->resettime = nsp32_prom_read(data, 0x11);
3242
3243         /*
3244          * each device Synchronous Transfer Period
3245          */
3246         for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3247                 target = &data->target[i];
3248                 ret = nsp32_prom_read(data, i);
3249                 switch (ret) {
3250                 case 0:         /* 20MB/s */
3251                         val = 0x0c;
3252                         break;
3253                 case 1:         /* 10MB/s */
3254                         val = 0x19;
3255                         break;
3256                 case 2:         /* 5MB/s */
3257                         val = 0x32;
3258                         break;
3259                 case 3:         /* ASYNC */
3260                         val = 0x00;
3261                         break;
3262                 default:        /* default 20MB/s */
3263                         val = 0x0c;
3264                         break;
3265                 }
3266                 entry = nsp32_search_period_entry(data, target, val);
3267                 if (entry < 0 || trans_mode == ULTRA20M_MODE) {
3268                         /* search failed... set maximum speed */
3269                         entry = 0;
3270                 }
3271                 target->limit_entry = entry;
3272         }
3273
3274         return TRUE;
3275 }
3276