Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
[linux-2.6] / drivers / scsi / fd_mcs.c
1 /* fd_mcs.c -- Future Domain MCS 600/700 (or IBM OEM) driver
2  *
3  * FutureDomain MCS-600/700 v0.2 03/11/1998 by ZP Gu (zpg@castle.net)
4  *
5  * This driver is cloned from fdomain.* to specifically support
6  * the Future Domain MCS 600/700 MCA SCSI adapters. Some PS/2s
7  * also equipped with IBM Fast SCSI Adapter/A which is an OEM
8  * of MCS 700.
9  *
10  * This driver also supports Reply SB16/SCSI card (the SCSI part).
11  *
12  * What makes this driver different is that this driver is MCA only
13  * and it supports multiple adapters in the same system, IRQ 
14  * sharing, some driver statistics, and maps highest SCSI id to sda.
15  * All cards are auto-detected.
16  *
17  * Assumptions: TMC-1800/18C50/18C30, BIOS >= 3.4
18  *
19  * LILO command-line options:
20  *   fd_mcs=<FIFO_COUNT>[,<FIFO_SIZE>]
21  *
22  * ********************************************************
23  * Please see Copyrights/Comments in fdomain.* for credits.
24  * Following is from fdomain.c for acknowledgement:
25  *
26  * Created: Sun May  3 18:53:19 1992 by faith@cs.unc.edu
27  * Revised: Wed Oct  2 11:10:55 1996 by r.faith@ieee.org
28  * Author: Rickard E. Faith, faith@cs.unc.edu
29  * Copyright 1992, 1993, 1994, 1995, 1996 Rickard E. Faith
30  *
31  * $Id: fdomain.c,v 5.45 1996/10/02 15:13:06 root Exp $
32
33  * This program is free software; you can redistribute it and/or modify it
34  * under the terms of the GNU General Public License as published by the
35  * Free Software Foundation; either version 2, or (at your option) any
36  * later version.
37
38  * This program is distributed in the hope that it will be useful, but
39  * WITHOUT ANY WARRANTY; without even the implied warranty of
40  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
41  * General Public License for more details.
42
43  * You should have received a copy of the GNU General Public License along
44  * with this program; if not, write to the Free Software Foundation, Inc.,
45  * 675 Mass Ave, Cambridge, MA 02139, USA.
46
47  **************************************************************************
48
49  NOTES ON USER DEFINABLE OPTIONS:
50
51  DEBUG: This turns on the printing of various debug information.
52
53  ENABLE_PARITY: This turns on SCSI parity checking.  With the current
54  driver, all attached devices must support SCSI parity.  If none of your
55  devices support parity, then you can probably get the driver to work by
56  turning this option off.  I have no way of testing this, however, and it
57  would appear that no one ever uses this option.
58
59  FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
60  18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
61  the SCSI device, an interrupt will be raised.  Therefore, this could be as
62  low as 0, or as high as 16.  Note, however, that values which are too high
63  or too low seem to prevent any interrupts from occurring, and thereby lock
64  up the machine.  I have found that 2 is a good number, but throughput may
65  be increased by changing this value to values which are close to 2.
66  Please let me know if you try any different values.
67  [*****Now a runtime option*****]
68
69  RESELECTION: This is no longer an option, since I gave up trying to
70  implement it in version 4.x of this driver.  It did not improve
71  performance at all and made the driver unstable (because I never found one
72  of the two race conditions which were introduced by the multiple
73  outstanding command code).  The instability seems a very high price to pay
74  just so that you don't have to wait for the tape to rewind.  If you want
75  this feature implemented, send me patches.  I'll be happy to send a copy
76  of my (broken) driver to anyone who would like to see a copy.
77
78  **************************************************************************/
79
80 #include <linux/module.h>
81 #include <linux/init.h>
82 #include <linux/interrupt.h>
83 #include <linux/blkdev.h>
84 #include <linux/errno.h>
85 #include <linux/string.h>
86 #include <linux/ioport.h>
87 #include <linux/proc_fs.h>
88 #include <linux/delay.h>
89 #include <linux/mca.h>
90 #include <linux/spinlock.h>
91 #include <scsi/scsicam.h>
92 #include <linux/mca-legacy.h>
93
94 #include <asm/io.h>
95 #include <asm/system.h>
96
97 #include "scsi.h"
98 #include <scsi/scsi_host.h>
99
100 #define DRIVER_VERSION "v0.2 by ZP Gu<zpg@castle.net>"
101
102 /* START OF USER DEFINABLE OPTIONS */
103
104 #define DEBUG            0      /* Enable debugging output */
105 #define ENABLE_PARITY    1      /* Enable SCSI Parity */
106
107 /* END OF USER DEFINABLE OPTIONS */
108
109 #if DEBUG
110 #define EVERY_ACCESS     0      /* Write a line on every scsi access */
111 #define ERRORS_ONLY      1      /* Only write a line if there is an error */
112 #define DEBUG_MESSAGES   1      /* Debug MESSAGE IN phase */
113 #define DEBUG_ABORT      1      /* Debug abort() routine */
114 #define DEBUG_RESET      1      /* Debug reset() routine */
115 #define DEBUG_RACE       1      /* Debug interrupt-driven race condition */
116 #else
117 #define EVERY_ACCESS     0      /* LEAVE THESE ALONE--CHANGE THE ONES ABOVE */
118 #define ERRORS_ONLY      0
119 #define DEBUG_MESSAGES   0
120 #define DEBUG_ABORT      0
121 #define DEBUG_RESET      0
122 #define DEBUG_RACE       0
123 #endif
124
125 /* Errors are reported on the line, so we don't need to report them again */
126 #if EVERY_ACCESS
127 #undef ERRORS_ONLY
128 #define ERRORS_ONLY      0
129 #endif
130
131 #if ENABLE_PARITY
132 #define PARITY_MASK      0x08
133 #else
134 #define PARITY_MASK      0x00
135 #endif
136
137 enum chip_type {
138         unknown = 0x00,
139         tmc1800 = 0x01,
140         tmc18c50 = 0x02,
141         tmc18c30 = 0x03,
142 };
143
144 enum {
145         in_arbitration = 0x02,
146         in_selection = 0x04,
147         in_other = 0x08,
148         disconnect = 0x10,
149         aborted = 0x20,
150         sent_ident = 0x40,
151 };
152
153 enum in_port_type {
154         Read_SCSI_Data = 0,
155         SCSI_Status = 1,
156         TMC_Status = 2,
157         FIFO_Status = 3,        /* tmc18c50/tmc18c30 only */
158         Interrupt_Cond = 4,     /* tmc18c50/tmc18c30 only */
159         LSB_ID_Code = 5,
160         MSB_ID_Code = 6,
161         Read_Loopback = 7,
162         SCSI_Data_NoACK = 8,
163         Interrupt_Status = 9,
164         Configuration1 = 10,
165         Configuration2 = 11,    /* tmc18c50/tmc18c30 only */
166         Read_FIFO = 12,
167         FIFO_Data_Count = 14
168 };
169
170 enum out_port_type {
171         Write_SCSI_Data = 0,
172         SCSI_Cntl = 1,
173         Interrupt_Cntl = 2,
174         SCSI_Mode_Cntl = 3,
175         TMC_Cntl = 4,
176         Memory_Cntl = 5,        /* tmc18c50/tmc18c30 only */
177         Write_Loopback = 7,
178         IO_Control = 11,        /* tmc18c30 only */
179         Write_FIFO = 12
180 };
181
182 struct fd_hostdata {
183         unsigned long _bios_base;
184         int _bios_major;
185         int _bios_minor;
186         volatile int _in_command;
187         Scsi_Cmnd *_current_SC;
188         enum chip_type _chip;
189         int _adapter_mask;
190         int _fifo_count;        /* Number of 512 byte blocks before INTR */
191
192         char _adapter_name[64];
193 #if DEBUG_RACE
194         volatile int _in_interrupt_flag;
195 #endif
196
197         int _SCSI_Mode_Cntl_port;
198         int _FIFO_Data_Count_port;
199         int _Interrupt_Cntl_port;
200         int _Interrupt_Status_port;
201         int _Interrupt_Cond_port;
202         int _Read_FIFO_port;
203         int _Read_SCSI_Data_port;
204         int _SCSI_Cntl_port;
205         int _SCSI_Data_NoACK_port;
206         int _SCSI_Status_port;
207         int _TMC_Cntl_port;
208         int _TMC_Status_port;
209         int _Write_FIFO_port;
210         int _Write_SCSI_Data_port;
211
212         int _FIFO_Size;         /* = 0x2000;  8k FIFO for
213                                    pre-tmc18c30 chips */
214         /* simple stats */
215         int _Bytes_Read;
216         int _Bytes_Written;
217         int _INTR_Processed;
218 };
219
220 #define FD_MAX_HOSTS 3          /* enough? */
221
222 #define HOSTDATA(shpnt) ((struct fd_hostdata *) shpnt->hostdata)
223 #define bios_base             (HOSTDATA(shpnt)->_bios_base)
224 #define bios_major            (HOSTDATA(shpnt)->_bios_major)
225 #define bios_minor            (HOSTDATA(shpnt)->_bios_minor)
226 #define in_command            (HOSTDATA(shpnt)->_in_command)
227 #define current_SC            (HOSTDATA(shpnt)->_current_SC)
228 #define chip                  (HOSTDATA(shpnt)->_chip)
229 #define adapter_mask          (HOSTDATA(shpnt)->_adapter_mask)
230 #define FIFO_COUNT            (HOSTDATA(shpnt)->_fifo_count)
231 #define adapter_name          (HOSTDATA(shpnt)->_adapter_name)
232 #if DEBUG_RACE
233 #define in_interrupt_flag     (HOSTDATA(shpnt)->_in_interrupt_flag)
234 #endif
235 #define SCSI_Mode_Cntl_port   (HOSTDATA(shpnt)->_SCSI_Mode_Cntl_port)
236 #define FIFO_Data_Count_port  (HOSTDATA(shpnt)->_FIFO_Data_Count_port)
237 #define Interrupt_Cntl_port   (HOSTDATA(shpnt)->_Interrupt_Cntl_port)
238 #define Interrupt_Status_port (HOSTDATA(shpnt)->_Interrupt_Status_port)
239 #define Interrupt_Cond_port   (HOSTDATA(shpnt)->_Interrupt_Cond_port)
240 #define Read_FIFO_port        (HOSTDATA(shpnt)->_Read_FIFO_port)
241 #define Read_SCSI_Data_port   (HOSTDATA(shpnt)->_Read_SCSI_Data_port)
242 #define SCSI_Cntl_port        (HOSTDATA(shpnt)->_SCSI_Cntl_port)
243 #define SCSI_Data_NoACK_port  (HOSTDATA(shpnt)->_SCSI_Data_NoACK_port)
244 #define SCSI_Status_port      (HOSTDATA(shpnt)->_SCSI_Status_port)
245 #define TMC_Cntl_port         (HOSTDATA(shpnt)->_TMC_Cntl_port)
246 #define TMC_Status_port       (HOSTDATA(shpnt)->_TMC_Status_port)
247 #define Write_FIFO_port       (HOSTDATA(shpnt)->_Write_FIFO_port)
248 #define Write_SCSI_Data_port  (HOSTDATA(shpnt)->_Write_SCSI_Data_port)
249 #define FIFO_Size             (HOSTDATA(shpnt)->_FIFO_Size)
250 #define Bytes_Read            (HOSTDATA(shpnt)->_Bytes_Read)
251 #define Bytes_Written         (HOSTDATA(shpnt)->_Bytes_Written)
252 #define INTR_Processed        (HOSTDATA(shpnt)->_INTR_Processed)
253
254 struct fd_mcs_adapters_struct {
255         char *name;
256         int id;
257         enum chip_type fd_chip;
258         int fifo_size;
259         int fifo_count;
260 };
261
262 #define REPLY_ID 0x5137
263
264 static struct fd_mcs_adapters_struct fd_mcs_adapters[] = {
265         {"Future Domain SCSI Adapter MCS-700(18C50)",
266          0x60e9,
267          tmc18c50,
268          0x2000,
269          4},
270         {"Future Domain SCSI Adapter MCS-600/700(TMC-1800)",
271          0x6127,
272          tmc1800,
273          0x2000,
274          4},
275         {"Reply Sound Blaster/SCSI Adapter",
276          REPLY_ID,
277          tmc18c30,
278          0x800,
279          2},
280 };
281
282 #define FD_BRDS ARRAY_SIZE(fd_mcs_adapters)
283
284 static irqreturn_t fd_mcs_intr(int irq, void *dev_id);
285
286 static unsigned long addresses[] = { 0xc8000, 0xca000, 0xce000, 0xde000 };
287 static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
288 static unsigned short interrupts[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
289
290 /* host information */
291 static int found = 0;
292 static struct Scsi_Host *hosts[FD_MAX_HOSTS + 1] = { NULL };
293
294 static int user_fifo_count = 0;
295 static int user_fifo_size = 0;
296
297 #ifndef MODULE
298 static int __init fd_mcs_setup(char *str)
299 {
300         static int done_setup = 0;
301         int ints[3];
302
303         get_options(str, 3, ints);
304         if (done_setup++ || ints[0] < 1 || ints[0] > 2 || ints[1] < 1 || ints[1] > 16) {
305                 printk("fd_mcs: usage: fd_mcs=FIFO_COUNT, FIFO_SIZE\n");
306                 return 0;
307         }
308
309         user_fifo_count = ints[0] >= 1 ? ints[1] : 0;
310         user_fifo_size = ints[0] >= 2 ? ints[2] : 0;
311         return 1;
312 }
313
314 __setup("fd_mcs=", fd_mcs_setup);
315 #endif /* !MODULE */
316
317 static void print_banner(struct Scsi_Host *shpnt)
318 {
319         printk("scsi%d <fd_mcs>: ", shpnt->host_no);
320
321         if (bios_base) {
322                 printk("BIOS at 0x%lX", bios_base);
323         } else {
324                 printk("No BIOS");
325         }
326
327         printk(", HostID %d, %s Chip, IRQ %d, IO 0x%lX\n", shpnt->this_id, chip == tmc18c50 ? "TMC-18C50" : (chip == tmc18c30 ? "TMC-18C30" : (chip == tmc1800 ? "TMC-1800" : "Unknown")), shpnt->irq, shpnt->io_port);
328 }
329
330
331 static void do_pause(unsigned amount)
332 {                               /* Pause for amount*10 milliseconds */
333         do {
334                 mdelay(10);
335         } while (--amount);
336 }
337
338 static void fd_mcs_make_bus_idle(struct Scsi_Host *shpnt)
339 {
340         outb(0, SCSI_Cntl_port);
341         outb(0, SCSI_Mode_Cntl_port);
342         if (chip == tmc18c50 || chip == tmc18c30)
343                 outb(0x21 | PARITY_MASK, TMC_Cntl_port);        /* Clear forced intr. */
344         else
345                 outb(0x01 | PARITY_MASK, TMC_Cntl_port);
346 }
347
348 static int fd_mcs_detect(struct scsi_host_template * tpnt)
349 {
350         int loop;
351         struct Scsi_Host *shpnt;
352
353         /* get id, port, bios, irq */
354         int slot;
355         u_char pos2, pos3, pos4;
356         int id, port, irq;
357         unsigned long bios;
358
359         /* if not MCA machine, return */
360         if (!MCA_bus)
361                 return 0;
362
363         /* changeable? */
364         id = 7;
365
366         for (loop = 0; loop < FD_BRDS; loop++) {
367                 slot = 0;
368                 while (MCA_NOTFOUND != (slot = mca_find_adapter(fd_mcs_adapters[loop].id, slot))) {
369
370                         /* if we get this far, an adapter has been detected and is
371                            enabled */
372
373                         printk(KERN_INFO "scsi  <fd_mcs>: %s at slot %d\n", fd_mcs_adapters[loop].name, slot + 1);
374
375                         pos2 = mca_read_stored_pos(slot, 2);
376                         pos3 = mca_read_stored_pos(slot, 3);
377                         pos4 = mca_read_stored_pos(slot, 4);
378
379                         /* ready for next probe */
380                         slot++;
381
382                         if (fd_mcs_adapters[loop].id == REPLY_ID) {     /* reply card */
383                                 static int reply_irq[] = { 10, 11, 14, 15 };
384
385                                 bios = 0;       /* no bios */
386
387                                 if (pos2 & 0x2)
388                                         port = ports[pos4 & 0x3];
389                                 else
390                                         continue;
391
392                                 /* can't really disable it, same as irq=10 */
393                                 irq = reply_irq[((pos4 >> 2) & 0x1) + 2 * ((pos4 >> 4) & 0x1)];
394                         } else {
395                                 bios = addresses[pos2 >> 6];
396                                 port = ports[(pos2 >> 4) & 0x03];
397                                 irq = interrupts[(pos2 >> 1) & 0x07];
398                         }
399
400                         if (irq) {
401                                 /* claim the slot */
402                                 mca_set_adapter_name(slot - 1, fd_mcs_adapters[loop].name);
403
404                                 /* check irq/region */
405                                 if (request_irq(irq, fd_mcs_intr, IRQF_SHARED, "fd_mcs", hosts)) {
406                                         printk(KERN_ERR "fd_mcs: interrupt is not available, skipping...\n");
407                                         continue;
408                                 }
409
410                                 /* request I/O region */
411                                 if (request_region(port, 0x10, "fd_mcs")) {
412                                         printk(KERN_ERR "fd_mcs: I/O region is already in use, skipping...\n");
413                                         continue;
414                                 }
415                                 /* register */
416                                 if (!(shpnt = scsi_register(tpnt, sizeof(struct fd_hostdata)))) {
417                                         printk(KERN_ERR "fd_mcs: scsi_register() failed\n");
418                                         release_region(port, 0x10);
419                                         free_irq(irq, hosts);
420                                         continue;
421                                 }
422
423
424                                 /* save name */
425                                 strcpy(adapter_name, fd_mcs_adapters[loop].name);
426
427                                 /* chip/fifo */
428                                 chip = fd_mcs_adapters[loop].fd_chip;
429                                 /* use boot time value if available */
430                                 FIFO_COUNT = user_fifo_count ? user_fifo_count : fd_mcs_adapters[loop].fifo_count;
431                                 FIFO_Size = user_fifo_size ? user_fifo_size : fd_mcs_adapters[loop].fifo_size;
432
433 /* FIXME: Do we need to keep this bit of code inside NOT_USED around at all? */
434 #ifdef NOT_USED
435                                 /* *************************************************** */
436                                 /* Try to toggle 32-bit mode.  This only
437                                    works on an 18c30 chip.  (User reports
438                                    say this works, so we should switch to
439                                    it in the near future.) */
440                                 outb(0x80, port + IO_Control);
441                                 if ((inb(port + Configuration2) & 0x80) == 0x80) {
442                                         outb(0x00, port + IO_Control);
443                                         if ((inb(port + Configuration2) & 0x80) == 0x00) {
444                                                 chip = tmc18c30;
445                                                 FIFO_Size = 0x800;      /* 2k FIFO */
446
447                                                 printk("FIRST: chip=%s, fifo_size=0x%x\n", (chip == tmc18c30) ? "tmc18c30" : "tmc18c50", FIFO_Size);
448                                         }
449                                 }
450
451                                 /* That should have worked, but appears to
452                                    have problems.  Let's assume it is an
453                                    18c30 if the RAM is disabled. */
454
455                                 if (inb(port + Configuration2) & 0x02) {
456                                         chip = tmc18c30;
457                                         FIFO_Size = 0x800;      /* 2k FIFO */
458
459                                         printk("SECOND: chip=%s, fifo_size=0x%x\n", (chip == tmc18c30) ? "tmc18c30" : "tmc18c50", FIFO_Size);
460                                 }
461                                 /* *************************************************** */
462 #endif
463
464                                 /* IBM/ANSI scsi scan ordering */
465                                 /* Stick this back in when the scsi.c changes are there */
466                                 shpnt->reverse_ordering = 1;
467
468
469                                 /* saving info */
470                                 hosts[found++] = shpnt;
471
472                                 shpnt->this_id = id;
473                                 shpnt->irq = irq;
474                                 shpnt->io_port = port;
475                                 shpnt->n_io_port = 0x10;
476
477                                 /* save */
478                                 bios_base = bios;
479                                 adapter_mask = (1 << id);
480
481                                 /* save more */
482                                 SCSI_Mode_Cntl_port = port + SCSI_Mode_Cntl;
483                                 FIFO_Data_Count_port = port + FIFO_Data_Count;
484                                 Interrupt_Cntl_port = port + Interrupt_Cntl;
485                                 Interrupt_Status_port = port + Interrupt_Status;
486                                 Interrupt_Cond_port = port + Interrupt_Cond;
487                                 Read_FIFO_port = port + Read_FIFO;
488                                 Read_SCSI_Data_port = port + Read_SCSI_Data;
489                                 SCSI_Cntl_port = port + SCSI_Cntl;
490                                 SCSI_Data_NoACK_port = port + SCSI_Data_NoACK;
491                                 SCSI_Status_port = port + SCSI_Status;
492                                 TMC_Cntl_port = port + TMC_Cntl;
493                                 TMC_Status_port = port + TMC_Status;
494                                 Write_FIFO_port = port + Write_FIFO;
495                                 Write_SCSI_Data_port = port + Write_SCSI_Data;
496
497                                 Bytes_Read = 0;
498                                 Bytes_Written = 0;
499                                 INTR_Processed = 0;
500
501                                 /* say something */
502                                 print_banner(shpnt);
503
504                                 /* reset */
505                                 outb(1, SCSI_Cntl_port);
506                                 do_pause(2);
507                                 outb(0, SCSI_Cntl_port);
508                                 do_pause(115);
509                                 outb(0, SCSI_Mode_Cntl_port);
510                                 outb(PARITY_MASK, TMC_Cntl_port);
511                                 /* done reset */
512                         }
513                 }
514
515                 if (found == FD_MAX_HOSTS) {
516                         printk("fd_mcs: detecting reached max=%d host adapters.\n", FD_MAX_HOSTS);
517                         break;
518                 }
519         }
520
521         return found;
522 }
523
524 static const char *fd_mcs_info(struct Scsi_Host *shpnt)
525 {
526         return adapter_name;
527 }
528
529 static int TOTAL_INTR = 0;
530
531 /*
532  * inout : decides on the direction of the dataflow and the meaning of the 
533  *         variables
534  * buffer: If inout==FALSE data is being written to it else read from it
535  * *start: If inout==FALSE start of the valid data in the buffer
536  * offset: If inout==FALSE offset from the beginning of the imaginary file 
537  *         from which we start writing into the buffer
538  * length: If inout==FALSE max number of bytes to be written into the buffer 
539  *         else number of bytes in the buffer
540  */
541 static int fd_mcs_proc_info(struct Scsi_Host *shpnt, char *buffer, char **start, off_t offset, int length, int inout)
542 {
543         int len = 0;
544
545         if (inout)
546                 return (-ENOSYS);
547
548         *start = buffer + offset;
549
550         len += sprintf(buffer + len, "Future Domain MCS-600/700 Driver %s\n", DRIVER_VERSION);
551         len += sprintf(buffer + len, "HOST #%d: %s\n", shpnt->host_no, adapter_name);
552         len += sprintf(buffer + len, "FIFO Size=0x%x, FIFO Count=%d\n", FIFO_Size, FIFO_COUNT);
553         len += sprintf(buffer + len, "DriverCalls=%d, Interrupts=%d, BytesRead=%d, BytesWrite=%d\n\n", TOTAL_INTR, INTR_Processed, Bytes_Read, Bytes_Written);
554
555         if ((len -= offset) <= 0)
556                 return 0;
557         if (len > length)
558                 len = length;
559         return len;
560 }
561
562 static int fd_mcs_select(struct Scsi_Host *shpnt, int target)
563 {
564         int status;
565         unsigned long timeout;
566
567         outb(0x82, SCSI_Cntl_port);     /* Bus Enable + Select */
568         outb(adapter_mask | (1 << target), SCSI_Data_NoACK_port);
569
570         /* Stop arbitration and enable parity */
571         outb(PARITY_MASK, TMC_Cntl_port);
572
573         timeout = 350;          /* 350mS -- because of timeouts
574                                    (was 250mS) */
575
576         do {
577                 status = inb(SCSI_Status_port); /* Read adapter status */
578                 if (status & 1) {       /* Busy asserted */
579                         /* Enable SCSI Bus (on error, should make bus idle with 0) */
580                         outb(0x80, SCSI_Cntl_port);
581                         return 0;
582                 }
583                 udelay(1000);   /* wait one msec */
584         } while (--timeout);
585
586         /* Make bus idle */
587         fd_mcs_make_bus_idle(shpnt);
588 #if EVERY_ACCESS
589         if (!target)
590                 printk("Selection failed\n");
591 #endif
592 #if ERRORS_ONLY
593         if (!target) {
594                 static int flag = 0;
595
596                 if (!flag)      /* Skip first failure for all chips. */
597                         ++flag;
598                 else
599                         printk("fd_mcs: Selection failed\n");
600         }
601 #endif
602         return 1;
603 }
604
605 static void my_done(struct Scsi_Host *shpnt, int error)
606 {
607         if (in_command) {
608                 in_command = 0;
609                 outb(0x00, Interrupt_Cntl_port);
610                 fd_mcs_make_bus_idle(shpnt);
611                 current_SC->result = error;
612                 current_SC->scsi_done(current_SC);
613         } else {
614                 panic("fd_mcs: my_done() called outside of command\n");
615         }
616 #if DEBUG_RACE
617         in_interrupt_flag = 0;
618 #endif
619 }
620
621 /* only my_done needs to be protected  */
622 static irqreturn_t fd_mcs_intr(int irq, void *dev_id)
623 {
624         unsigned long flags;
625         int status;
626         int done = 0;
627         unsigned data_count, tmp_count;
628
629         int i = 0;
630         struct Scsi_Host *shpnt;
631
632         TOTAL_INTR++;
633
634         /* search for one adapter-response on shared interrupt */
635         while ((shpnt = hosts[i++])) {
636                 if ((inb(TMC_Status_port)) & 1)
637                         break;
638         }
639
640         /* return if some other device on this IRQ caused the interrupt */
641         if (!shpnt) {
642                 return IRQ_NONE;
643         }
644
645         INTR_Processed++;
646
647         outb(0x00, Interrupt_Cntl_port);
648
649         /* Abort calls my_done, so we do nothing here. */
650         if (current_SC->SCp.phase & aborted) {
651 #if DEBUG_ABORT
652                 printk("Interrupt after abort, ignoring\n");
653 #endif
654                 /* return IRQ_HANDLED; */
655         }
656 #if DEBUG_RACE
657         ++in_interrupt_flag;
658 #endif
659
660         if (current_SC->SCp.phase & in_arbitration) {
661                 status = inb(TMC_Status_port);  /* Read adapter status */
662                 if (!(status & 0x02)) {
663 #if EVERY_ACCESS
664                         printk(" AFAIL ");
665 #endif
666                         spin_lock_irqsave(shpnt->host_lock, flags);
667                         my_done(shpnt, DID_BUS_BUSY << 16);
668                         spin_unlock_irqrestore(shpnt->host_lock, flags);
669                         return IRQ_HANDLED;
670                 }
671                 current_SC->SCp.phase = in_selection;
672
673                 outb(0x40 | FIFO_COUNT, Interrupt_Cntl_port);
674
675                 outb(0x82, SCSI_Cntl_port);     /* Bus Enable + Select */
676                 outb(adapter_mask | (1 << scmd_id(current_SC)), SCSI_Data_NoACK_port);
677
678                 /* Stop arbitration and enable parity */
679                 outb(0x10 | PARITY_MASK, TMC_Cntl_port);
680 #if DEBUG_RACE
681                 in_interrupt_flag = 0;
682 #endif
683                 return IRQ_HANDLED;
684         } else if (current_SC->SCp.phase & in_selection) {
685                 status = inb(SCSI_Status_port);
686                 if (!(status & 0x01)) {
687                         /* Try again, for slow devices */
688                         if (fd_mcs_select(shpnt, scmd_id(current_SC))) {
689 #if EVERY_ACCESS
690                                 printk(" SFAIL ");
691 #endif
692                                 spin_lock_irqsave(shpnt->host_lock, flags);
693                                 my_done(shpnt, DID_NO_CONNECT << 16);
694                                 spin_unlock_irqrestore(shpnt->host_lock, flags);
695                                 return IRQ_HANDLED;
696                         } else {
697 #if EVERY_ACCESS
698                                 printk(" AltSel ");
699 #endif
700                                 /* Stop arbitration and enable parity */
701                                 outb(0x10 | PARITY_MASK, TMC_Cntl_port);
702                         }
703                 }
704                 current_SC->SCp.phase = in_other;
705                 outb(0x90 | FIFO_COUNT, Interrupt_Cntl_port);
706                 outb(0x80, SCSI_Cntl_port);
707 #if DEBUG_RACE
708                 in_interrupt_flag = 0;
709 #endif
710                 return IRQ_HANDLED;
711         }
712
713         /* current_SC->SCp.phase == in_other: this is the body of the routine */
714
715         status = inb(SCSI_Status_port);
716
717         if (status & 0x10) {    /* REQ */
718
719                 switch (status & 0x0e) {
720
721                 case 0x08:      /* COMMAND OUT */
722                         outb(current_SC->cmnd[current_SC->SCp.sent_command++], Write_SCSI_Data_port);
723 #if EVERY_ACCESS
724                         printk("CMD = %x,", current_SC->cmnd[current_SC->SCp.sent_command - 1]);
725 #endif
726                         break;
727                 case 0x00:      /* DATA OUT -- tmc18c50/tmc18c30 only */
728                         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
729                                 current_SC->SCp.have_data_in = -1;
730                                 outb(0xd0 | PARITY_MASK, TMC_Cntl_port);
731                         }
732                         break;
733                 case 0x04:      /* DATA IN -- tmc18c50/tmc18c30 only */
734                         if (chip != tmc1800 && !current_SC->SCp.have_data_in) {
735                                 current_SC->SCp.have_data_in = 1;
736                                 outb(0x90 | PARITY_MASK, TMC_Cntl_port);
737                         }
738                         break;
739                 case 0x0c:      /* STATUS IN */
740                         current_SC->SCp.Status = inb(Read_SCSI_Data_port);
741 #if EVERY_ACCESS
742                         printk("Status = %x, ", current_SC->SCp.Status);
743 #endif
744 #if ERRORS_ONLY
745                         if (current_SC->SCp.Status && current_SC->SCp.Status != 2 && current_SC->SCp.Status != 8) {
746                                 printk("ERROR fd_mcs: target = %d, command = %x, status = %x\n", current_SC->device->id, current_SC->cmnd[0], current_SC->SCp.Status);
747                         }
748 #endif
749                         break;
750                 case 0x0a:      /* MESSAGE OUT */
751                         outb(MESSAGE_REJECT, Write_SCSI_Data_port);     /* Reject */
752                         break;
753                 case 0x0e:      /* MESSAGE IN */
754                         current_SC->SCp.Message = inb(Read_SCSI_Data_port);
755 #if EVERY_ACCESS
756                         printk("Message = %x, ", current_SC->SCp.Message);
757 #endif
758                         if (!current_SC->SCp.Message)
759                                 ++done;
760 #if DEBUG_MESSAGES || EVERY_ACCESS
761                         if (current_SC->SCp.Message) {
762                                 printk("fd_mcs: message = %x\n", current_SC->SCp.Message);
763                         }
764 #endif
765                         break;
766                 }
767         }
768
769         if (chip == tmc1800 && !current_SC->SCp.have_data_in && (current_SC->SCp.sent_command >= current_SC->cmd_len)) {
770                 /* We have to get the FIFO direction
771                    correct, so I've made a table based
772                    on the SCSI Standard of which commands
773                    appear to require a DATA OUT phase.
774                  */
775                 /*
776                    p. 94: Command for all device types
777                    CHANGE DEFINITION            40 DATA OUT
778                    COMPARE                      39 DATA OUT
779                    COPY                         18 DATA OUT
780                    COPY AND VERIFY              3a DATA OUT
781                    INQUIRY                      12 
782                    LOG SELECT                   4c DATA OUT
783                    LOG SENSE                    4d
784                    MODE SELECT (6)              15 DATA OUT
785                    MODE SELECT (10)             55 DATA OUT
786                    MODE SENSE (6)               1a
787                    MODE SENSE (10)              5a
788                    READ BUFFER                  3c
789                    RECEIVE DIAGNOSTIC RESULTS   1c
790                    REQUEST SENSE                03
791                    SEND DIAGNOSTIC              1d DATA OUT
792                    TEST UNIT READY              00
793                    WRITE BUFFER                 3b DATA OUT
794
795                    p.178: Commands for direct-access devices (not listed on p. 94)
796                    FORMAT UNIT                  04 DATA OUT
797                    LOCK-UNLOCK CACHE            36
798                    PRE-FETCH                    34
799                    PREVENT-ALLOW MEDIUM REMOVAL 1e
800                    READ (6)/RECEIVE             08
801                    READ (10)                    3c
802                    READ CAPACITY                25
803                    READ DEFECT DATA (10)        37
804                    READ LONG                    3e
805                    REASSIGN BLOCKS              07 DATA OUT
806                    RELEASE                      17
807                    RESERVE                      16 DATA OUT
808                    REZERO UNIT/REWIND           01
809                    SEARCH DATA EQUAL (10)       31 DATA OUT
810                    SEARCH DATA HIGH (10)        30 DATA OUT
811                    SEARCH DATA LOW (10)         32 DATA OUT
812                    SEEK (6)                     0b
813                    SEEK (10)                    2b
814                    SET LIMITS (10)              33
815                    START STOP UNIT              1b
816                    SYNCHRONIZE CACHE            35
817                    VERIFY (10)                  2f
818                    WRITE (6)/PRINT/SEND         0a DATA OUT
819                    WRITE (10)/SEND              2a DATA OUT
820                    WRITE AND VERIFY (10)        2e DATA OUT
821                    WRITE LONG                   3f DATA OUT
822                    WRITE SAME                   41 DATA OUT ?
823
824                    p. 261: Commands for sequential-access devices (not previously listed)
825                    ERASE                        19
826                    LOAD UNLOAD                  1b
827                    LOCATE                       2b
828                    READ BLOCK LIMITS            05
829                    READ POSITION                34
830                    READ REVERSE                 0f
831                    RECOVER BUFFERED DATA        14
832                    SPACE                        11
833                    WRITE FILEMARKS              10 ?
834
835                    p. 298: Commands for printer devices (not previously listed)
836                    ****** NOT SUPPORTED BY THIS DRIVER, since 0b is SEEK (6) *****
837                    SLEW AND PRINT               0b DATA OUT  -- same as seek
838                    STOP PRINT                   1b
839                    SYNCHRONIZE BUFFER           10
840
841                    p. 315: Commands for processor devices (not previously listed)
842
843                    p. 321: Commands for write-once devices (not previously listed)
844                    MEDIUM SCAN                  38
845                    READ (12)                    a8
846                    SEARCH DATA EQUAL (12)       b1 DATA OUT
847                    SEARCH DATA HIGH (12)        b0 DATA OUT
848                    SEARCH DATA LOW (12)         b2 DATA OUT
849                    SET LIMITS (12)              b3
850                    VERIFY (12)                  af
851                    WRITE (12)                   aa DATA OUT
852                    WRITE AND VERIFY (12)        ae DATA OUT
853
854                    p. 332: Commands for CD-ROM devices (not previously listed)
855                    PAUSE/RESUME                 4b
856                    PLAY AUDIO (10)              45
857                    PLAY AUDIO (12)              a5
858                    PLAY AUDIO MSF               47
859                    PLAY TRACK RELATIVE (10)     49
860                    PLAY TRACK RELATIVE (12)     a9
861                    READ HEADER                  44
862                    READ SUB-CHANNEL             42
863                    READ TOC                     43
864
865                    p. 370: Commands for scanner devices (not previously listed)
866                    GET DATA BUFFER STATUS       34
867                    GET WINDOW                   25
868                    OBJECT POSITION              31
869                    SCAN                         1b
870                    SET WINDOW                   24 DATA OUT
871
872                    p. 391: Commands for optical memory devices (not listed)
873                    ERASE (10)                   2c
874                    ERASE (12)                   ac
875                    MEDIUM SCAN                  38 DATA OUT
876                    READ DEFECT DATA (12)        b7
877                    READ GENERATION              29
878                    READ UPDATED BLOCK           2d
879                    UPDATE BLOCK                 3d DATA OUT
880
881                    p. 419: Commands for medium changer devices (not listed)
882                    EXCHANGE MEDIUM              46
883                    INITIALIZE ELEMENT STATUS    07
884                    MOVE MEDIUM                  a5
885                    POSITION TO ELEMENT          2b
886                    READ ELEMENT STATUS          b8
887                    REQUEST VOL. ELEMENT ADDRESS b5
888                    SEND VOLUME TAG              b6 DATA OUT
889
890                    p. 454: Commands for communications devices (not listed previously)
891                    GET MESSAGE (6)              08
892                    GET MESSAGE (10)             28
893                    GET MESSAGE (12)             a8
894                  */
895
896                 switch (current_SC->cmnd[0]) {
897                 case CHANGE_DEFINITION:
898                 case COMPARE:
899                 case COPY:
900                 case COPY_VERIFY:
901                 case LOG_SELECT:
902                 case MODE_SELECT:
903                 case MODE_SELECT_10:
904                 case SEND_DIAGNOSTIC:
905                 case WRITE_BUFFER:
906
907                 case FORMAT_UNIT:
908                 case REASSIGN_BLOCKS:
909                 case RESERVE:
910                 case SEARCH_EQUAL:
911                 case SEARCH_HIGH:
912                 case SEARCH_LOW:
913                 case WRITE_6:
914                 case WRITE_10:
915                 case WRITE_VERIFY:
916                 case 0x3f:
917                 case 0x41:
918
919                 case 0xb1:
920                 case 0xb0:
921                 case 0xb2:
922                 case 0xaa:
923                 case 0xae:
924
925                 case 0x24:
926
927                 case 0x38:
928                 case 0x3d:
929
930                 case 0xb6:
931
932                 case 0xea:      /* alternate number for WRITE LONG */
933
934                         current_SC->SCp.have_data_in = -1;
935                         outb(0xd0 | PARITY_MASK, TMC_Cntl_port);
936                         break;
937
938                 case 0x00:
939                 default:
940
941                         current_SC->SCp.have_data_in = 1;
942                         outb(0x90 | PARITY_MASK, TMC_Cntl_port);
943                         break;
944                 }
945         }
946
947         if (current_SC->SCp.have_data_in == -1) {       /* DATA OUT */
948                 while ((data_count = FIFO_Size - inw(FIFO_Data_Count_port)) > 512) {
949 #if EVERY_ACCESS
950                         printk("DC=%d, ", data_count);
951 #endif
952                         if (data_count > current_SC->SCp.this_residual)
953                                 data_count = current_SC->SCp.this_residual;
954                         if (data_count > 0) {
955 #if EVERY_ACCESS
956                                 printk("%d OUT, ", data_count);
957 #endif
958                                 if (data_count == 1) {
959                                         Bytes_Written++;
960
961                                         outb(*current_SC->SCp.ptr++, Write_FIFO_port);
962                                         --current_SC->SCp.this_residual;
963                                 } else {
964                                         data_count >>= 1;
965                                         tmp_count = data_count << 1;
966                                         outsw(Write_FIFO_port, current_SC->SCp.ptr, data_count);
967                                         current_SC->SCp.ptr += tmp_count;
968                                         Bytes_Written += tmp_count;
969                                         current_SC->SCp.this_residual -= tmp_count;
970                                 }
971                         }
972                         if (!current_SC->SCp.this_residual) {
973                                 if (current_SC->SCp.buffers_residual) {
974                                         --current_SC->SCp.buffers_residual;
975                                         ++current_SC->SCp.buffer;
976                                         current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
977                                         current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
978                                 } else
979                                         break;
980                         }
981                 }
982         } else if (current_SC->SCp.have_data_in == 1) { /* DATA IN */
983                 while ((data_count = inw(FIFO_Data_Count_port)) > 0) {
984 #if EVERY_ACCESS
985                         printk("DC=%d, ", data_count);
986 #endif
987                         if (data_count > current_SC->SCp.this_residual)
988                                 data_count = current_SC->SCp.this_residual;
989                         if (data_count) {
990 #if EVERY_ACCESS
991                                 printk("%d IN, ", data_count);
992 #endif
993                                 if (data_count == 1) {
994                                         Bytes_Read++;
995                                         *current_SC->SCp.ptr++ = inb(Read_FIFO_port);
996                                         --current_SC->SCp.this_residual;
997                                 } else {
998                                         data_count >>= 1;       /* Number of words */
999                                         tmp_count = data_count << 1;
1000                                         insw(Read_FIFO_port, current_SC->SCp.ptr, data_count);
1001                                         current_SC->SCp.ptr += tmp_count;
1002                                         Bytes_Read += tmp_count;
1003                                         current_SC->SCp.this_residual -= tmp_count;
1004                                 }
1005                         }
1006                         if (!current_SC->SCp.this_residual && current_SC->SCp.buffers_residual) {
1007                                 --current_SC->SCp.buffers_residual;
1008                                 ++current_SC->SCp.buffer;
1009                                 current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
1010                                 current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
1011                         }
1012                 }
1013         }
1014
1015         if (done) {
1016 #if EVERY_ACCESS
1017                 printk(" ** IN DONE %d ** ", current_SC->SCp.have_data_in);
1018 #endif
1019
1020 #if ERRORS_ONLY
1021                 if (current_SC->cmnd[0] == REQUEST_SENSE && !current_SC->SCp.Status) {
1022                         if ((unsigned char) (*((char *) current_SC->request_buffer + 2)) & 0x0f) {
1023                                 unsigned char key;
1024                                 unsigned char code;
1025                                 unsigned char qualifier;
1026
1027                                 key = (unsigned char) (*((char *) current_SC->request_buffer + 2)) & 0x0f;
1028                                 code = (unsigned char) (*((char *) current_SC->request_buffer + 12));
1029                                 qualifier = (unsigned char) (*((char *) current_SC->request_buffer + 13));
1030
1031                                 if (key != UNIT_ATTENTION && !(key == NOT_READY && code == 0x04 && (!qualifier || qualifier == 0x02 || qualifier == 0x01))
1032                                     && !(key == ILLEGAL_REQUEST && (code == 0x25 || code == 0x24 || !code)))
1033
1034                                         printk("fd_mcs: REQUEST SENSE " "Key = %x, Code = %x, Qualifier = %x\n", key, code, qualifier);
1035                         }
1036                 }
1037 #endif
1038 #if EVERY_ACCESS
1039                 printk("BEFORE MY_DONE. . .");
1040 #endif
1041                 spin_lock_irqsave(shpnt->host_lock, flags);
1042                 my_done(shpnt, (current_SC->SCp.Status & 0xff)
1043                         | ((current_SC->SCp.Message & 0xff) << 8) | (DID_OK << 16));
1044                 spin_unlock_irqrestore(shpnt->host_lock, flags);
1045 #if EVERY_ACCESS
1046                 printk("RETURNING.\n");
1047 #endif
1048
1049         } else {
1050                 if (current_SC->SCp.phase & disconnect) {
1051                         outb(0xd0 | FIFO_COUNT, Interrupt_Cntl_port);
1052                         outb(0x00, SCSI_Cntl_port);
1053                 } else {
1054                         outb(0x90 | FIFO_COUNT, Interrupt_Cntl_port);
1055                 }
1056         }
1057 #if DEBUG_RACE
1058         in_interrupt_flag = 0;
1059 #endif
1060         return IRQ_HANDLED;
1061 }
1062
1063 static int fd_mcs_release(struct Scsi_Host *shpnt)
1064 {
1065         int i, this_host, irq_usage;
1066
1067         release_region(shpnt->io_port, shpnt->n_io_port);
1068
1069         this_host = -1;
1070         irq_usage = 0;
1071         for (i = 0; i < found; i++) {
1072                 if (shpnt == hosts[i])
1073                         this_host = i;
1074                 if (shpnt->irq == hosts[i]->irq)
1075                         irq_usage++;
1076         }
1077
1078         /* only for the last one */
1079         if (1 == irq_usage)
1080                 free_irq(shpnt->irq, hosts);
1081
1082         found--;
1083
1084         for (i = this_host; i < found; i++)
1085                 hosts[i] = hosts[i + 1];
1086
1087         hosts[found] = NULL;
1088
1089         return 0;
1090 }
1091
1092 static int fd_mcs_queue(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
1093 {
1094         struct Scsi_Host *shpnt = SCpnt->device->host;
1095
1096         if (in_command) {
1097                 panic("fd_mcs: fd_mcs_queue() NOT REENTRANT!\n");
1098         }
1099 #if EVERY_ACCESS
1100         printk("queue: target = %d cmnd = 0x%02x pieces = %d size = %u\n", SCpnt->target, *(unsigned char *) SCpnt->cmnd, SCpnt->use_sg, SCpnt->request_bufflen);
1101 #endif
1102
1103         fd_mcs_make_bus_idle(shpnt);
1104
1105         SCpnt->scsi_done = done;        /* Save this for the done function */
1106         current_SC = SCpnt;
1107
1108         /* Initialize static data */
1109
1110         if (current_SC->use_sg) {
1111                 current_SC->SCp.buffer = (struct scatterlist *) current_SC->request_buffer;
1112                 current_SC->SCp.ptr = page_address(current_SC->SCp.buffer->page) + current_SC->SCp.buffer->offset;
1113                 current_SC->SCp.this_residual = current_SC->SCp.buffer->length;
1114                 current_SC->SCp.buffers_residual = current_SC->use_sg - 1;
1115         } else {
1116                 current_SC->SCp.ptr = (char *) current_SC->request_buffer;
1117                 current_SC->SCp.this_residual = current_SC->request_bufflen;
1118                 current_SC->SCp.buffer = NULL;
1119                 current_SC->SCp.buffers_residual = 0;
1120         }
1121
1122
1123         current_SC->SCp.Status = 0;
1124         current_SC->SCp.Message = 0;
1125         current_SC->SCp.have_data_in = 0;
1126         current_SC->SCp.sent_command = 0;
1127         current_SC->SCp.phase = in_arbitration;
1128
1129         /* Start arbitration */
1130         outb(0x00, Interrupt_Cntl_port);
1131         outb(0x00, SCSI_Cntl_port);     /* Disable data drivers */
1132         outb(adapter_mask, SCSI_Data_NoACK_port);       /* Set our id bit */
1133         in_command = 1;
1134         outb(0x20, Interrupt_Cntl_port);
1135         outb(0x14 | PARITY_MASK, TMC_Cntl_port);        /* Start arbitration */
1136
1137         return 0;
1138 }
1139
1140 #if DEBUG_ABORT || DEBUG_RESET
1141 static void fd_mcs_print_info(Scsi_Cmnd * SCpnt)
1142 {
1143         unsigned int imr;
1144         unsigned int irr;
1145         unsigned int isr;
1146         struct Scsi_Host *shpnt = SCpnt->host;
1147
1148         if (!SCpnt || !SCpnt->host) {
1149                 printk("fd_mcs: cannot provide detailed information\n");
1150         }
1151
1152         printk("%s\n", fd_mcs_info(SCpnt->host));
1153         print_banner(SCpnt->host);
1154         switch (SCpnt->SCp.phase) {
1155         case in_arbitration:
1156                 printk("arbitration ");
1157                 break;
1158         case in_selection:
1159                 printk("selection ");
1160                 break;
1161         case in_other:
1162                 printk("other ");
1163                 break;
1164         default:
1165                 printk("unknown ");
1166                 break;
1167         }
1168
1169         printk("(%d), target = %d cmnd = 0x%02x pieces = %d size = %u\n", SCpnt->SCp.phase, SCpnt->device->id, *(unsigned char *) SCpnt->cmnd, SCpnt->use_sg, SCpnt->request_bufflen);
1170         printk("sent_command = %d, have_data_in = %d, timeout = %d\n", SCpnt->SCp.sent_command, SCpnt->SCp.have_data_in, SCpnt->timeout);
1171 #if DEBUG_RACE
1172         printk("in_interrupt_flag = %d\n", in_interrupt_flag);
1173 #endif
1174
1175         imr = (inb(0x0a1) << 8) + inb(0x21);
1176         outb(0x0a, 0xa0);
1177         irr = inb(0xa0) << 8;
1178         outb(0x0a, 0x20);
1179         irr += inb(0x20);
1180         outb(0x0b, 0xa0);
1181         isr = inb(0xa0) << 8;
1182         outb(0x0b, 0x20);
1183         isr += inb(0x20);
1184
1185         /* Print out interesting information */
1186         printk("IMR = 0x%04x", imr);
1187         if (imr & (1 << shpnt->irq))
1188                 printk(" (masked)");
1189         printk(", IRR = 0x%04x, ISR = 0x%04x\n", irr, isr);
1190
1191         printk("SCSI Status      = 0x%02x\n", inb(SCSI_Status_port));
1192         printk("TMC Status       = 0x%02x", inb(TMC_Status_port));
1193         if (inb(TMC_Status_port) & 1)
1194                 printk(" (interrupt)");
1195         printk("\n");
1196         printk("Interrupt Status = 0x%02x", inb(Interrupt_Status_port));
1197         if (inb(Interrupt_Status_port) & 0x08)
1198                 printk(" (enabled)");
1199         printk("\n");
1200         if (chip == tmc18c50 || chip == tmc18c30) {
1201                 printk("FIFO Status      = 0x%02x\n", inb(shpnt->io_port + FIFO_Status));
1202                 printk("Int. Condition   = 0x%02x\n", inb(shpnt->io_port + Interrupt_Cond));
1203         }
1204         printk("Configuration 1  = 0x%02x\n", inb(shpnt->io_port + Configuration1));
1205         if (chip == tmc18c50 || chip == tmc18c30)
1206                 printk("Configuration 2  = 0x%02x\n", inb(shpnt->io_port + Configuration2));
1207 }
1208 #endif
1209
1210 static int fd_mcs_abort(Scsi_Cmnd * SCpnt)
1211 {
1212         struct Scsi_Host *shpnt = SCpnt->device->host;
1213
1214         unsigned long flags;
1215 #if EVERY_ACCESS || ERRORS_ONLY || DEBUG_ABORT
1216         printk("fd_mcs: abort ");
1217 #endif
1218
1219         spin_lock_irqsave(shpnt->host_lock, flags);
1220         if (!in_command) {
1221 #if EVERY_ACCESS || ERRORS_ONLY
1222                 printk(" (not in command)\n");
1223 #endif
1224                 spin_unlock_irqrestore(shpnt->host_lock, flags);
1225                 return FAILED;
1226         } else
1227                 printk("\n");
1228
1229 #if DEBUG_ABORT
1230         fd_mcs_print_info(SCpnt);
1231 #endif
1232
1233         fd_mcs_make_bus_idle(shpnt);
1234
1235         current_SC->SCp.phase |= aborted;
1236
1237         current_SC->result = DID_ABORT << 16;
1238
1239         /* Aborts are not done well. . . */
1240         my_done(shpnt, DID_ABORT << 16);
1241
1242         spin_unlock_irqrestore(shpnt->host_lock, flags);
1243         return SUCCESS;
1244 }
1245
1246 static int fd_mcs_bus_reset(Scsi_Cmnd * SCpnt) {
1247         struct Scsi_Host *shpnt = SCpnt->device->host;
1248         unsigned long flags;
1249
1250 #if DEBUG_RESET
1251         static int called_once = 0;
1252 #endif
1253
1254 #if ERRORS_ONLY
1255         if (SCpnt)
1256                 printk("fd_mcs: SCSI Bus Reset\n");
1257 #endif
1258
1259 #if DEBUG_RESET
1260         if (called_once)
1261                 fd_mcs_print_info(current_SC);
1262         called_once = 1;
1263 #endif
1264
1265         spin_lock_irqsave(shpnt->host_lock, flags);
1266
1267         outb(1, SCSI_Cntl_port);
1268         do_pause(2);
1269         outb(0, SCSI_Cntl_port);
1270         do_pause(115);
1271         outb(0, SCSI_Mode_Cntl_port);
1272         outb(PARITY_MASK, TMC_Cntl_port);
1273
1274         spin_unlock_irqrestore(shpnt->host_lock, flags);
1275
1276         /* Unless this is the very first call (i.e., SCPnt == NULL), everything
1277            is probably hosed at this point.  We will, however, try to keep
1278            things going by informing the high-level code that we need help. */
1279                 return SUCCESS;
1280 }
1281
1282 #include <scsi/scsi_ioctl.h>
1283
1284 static int fd_mcs_biosparam(struct scsi_device * disk, struct block_device *bdev,
1285                             sector_t capacity, int *info_array) 
1286 {
1287         unsigned char *p = scsi_bios_ptable(bdev);
1288         int size = capacity;
1289
1290         /* BIOS >= 3.4 for MCA cards */
1291         /* This algorithm was provided by Future Domain (much thanks!). */
1292
1293         if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
1294             && p[4]) {  /* Partition type */
1295                 /* The partition table layout is as follows:
1296
1297                    Start: 0x1b3h
1298                    Offset: 0 = partition status
1299                    1 = starting head
1300                    2 = starting sector and cylinder (word, encoded)
1301                    4 = partition type
1302                    5 = ending head
1303                    6 = ending sector and cylinder (word, encoded)
1304                    8 = starting absolute sector (double word)
1305                    c = number of sectors (double word)
1306                    Signature: 0x1fe = 0x55aa
1307
1308                    So, this algorithm assumes:
1309                    1) the first partition table is in use,
1310                    2) the data in the first entry is correct, and
1311                    3) partitions never divide cylinders
1312
1313                    Note that (1) may be FALSE for NetBSD (and other BSD flavors),
1314                    as well as for Linux.  Note also, that Linux doesn't pay any
1315                    attention to the fields that are used by this algorithm -- it
1316                    only uses the absolute sector data.  Recent versions of Linux's
1317                    fdisk(1) will fill this data in correctly, and forthcoming
1318                    versions will check for consistency.
1319
1320                    Checking for a non-zero partition type is not part of the
1321                    Future Domain algorithm, but it seemed to be a reasonable thing
1322                    to do, especially in the Linux and BSD worlds. */
1323
1324                 info_array[0] = p[5] + 1;       /* heads */
1325                 info_array[1] = p[6] & 0x3f;    /* sectors */
1326         } else {
1327                 /* Note that this new method guarantees that there will always be
1328                    less than 1024 cylinders on a platter.  This is good for drives
1329                    up to approximately 7.85GB (where 1GB = 1024 * 1024 kB). */
1330                 if ((unsigned int) size >= 0x7e0000U) 
1331                 {
1332                         info_array[0] = 0xff;   /* heads   = 255 */
1333                         info_array[1] = 0x3f;   /* sectors =  63 */
1334                 } else if ((unsigned int) size >= 0x200000U) {
1335                         info_array[0] = 0x80;   /* heads   = 128 */
1336                         info_array[1] = 0x3f;   /* sectors =  63 */
1337                 } else {
1338                         info_array[0] = 0x40;   /* heads   =  64 */
1339                         info_array[1] = 0x20;   /* sectors =  32 */
1340                 }
1341         }
1342         /* For both methods, compute the cylinders */
1343         info_array[2] = (unsigned int) size / (info_array[0] * info_array[1]);
1344         kfree(p);
1345         return 0;
1346 }
1347
1348 static struct scsi_host_template driver_template = {
1349         .proc_name                      = "fd_mcs",
1350         .proc_info                      = fd_mcs_proc_info,
1351         .detect                         = fd_mcs_detect,
1352         .release                        = fd_mcs_release,
1353         .info                           = fd_mcs_info,
1354         .queuecommand                   = fd_mcs_queue, 
1355         .eh_abort_handler               = fd_mcs_abort,
1356         .eh_bus_reset_handler           = fd_mcs_bus_reset,
1357         .bios_param                     = fd_mcs_biosparam,
1358         .can_queue                      = 1,
1359         .this_id                        = 7,
1360         .sg_tablesize                   = 64,
1361         .cmd_per_lun                    = 1,
1362         .use_clustering                 = DISABLE_CLUSTERING,
1363 };
1364 #include "scsi_module.c"
1365
1366 MODULE_LICENSE("GPL");