b1156fbd4a1a4bbd01516d62100dde6ab905585f
[linux-2.6.git] / drivers / scsi / aic7xxx / aic7xxx_pci.c
1 /*
2  * Product specific probe and attach routines for:
3  *      3940, 2940, aic7895, aic7890, aic7880,
4  *      aic7870, aic7860 and aic7850 SCSI controllers
5  *
6  * Copyright (c) 1994-2001 Justin T. Gibbs.
7  * Copyright (c) 2000-2001 Adaptec Inc.
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions, and the following disclaimer,
15  *    without modification.
16  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17  *    substantially similar to the "NO WARRANTY" disclaimer below
18  *    ("Disclaimer") and any redistribution must be conditioned upon
19  *    including a substantially similar Disclaimer requirement for further
20  *    binary redistribution.
21  * 3. Neither the names of the above-listed copyright holders nor the names
22  *    of any contributors may be used to endorse or promote products derived
23  *    from this software without specific prior written permission.
24  *
25  * Alternatively, this software may be distributed under the terms of the
26  * GNU General Public License ("GPL") version 2 as published by the Free
27  * Software Foundation.
28  *
29  * NO WARRANTY
30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
33  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
39  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40  * POSSIBILITY OF SUCH DAMAGES.
41  *
42  * $Id: //depot/aic7xxx/aic7xxx/aic7xxx_pci.c#79 $
43  */
44
45 #ifdef __linux__
46 #include "aic7xxx_osm.h"
47 #include "aic7xxx_inline.h"
48 #include "aic7xxx_93cx6.h"
49 #else
50 #include <dev/aic7xxx/aic7xxx_osm.h>
51 #include <dev/aic7xxx/aic7xxx_inline.h>
52 #include <dev/aic7xxx/aic7xxx_93cx6.h>
53 #endif
54
55 #include "aic7xxx_pci.h"
56
57 static __inline uint64_t
58 ahc_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
59 {
60         uint64_t id;
61
62         id = subvendor
63            | (subdevice << 16)
64            | ((uint64_t)vendor << 32)
65            | ((uint64_t)device << 48);
66
67         return (id);
68 }
69
70 #define AHC_PCI_IOADDR  PCIR_MAPS       /* I/O Address */
71 #define AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
72
73 #define DEVID_9005_TYPE(id) ((id) & 0xF)
74 #define         DEVID_9005_TYPE_HBA             0x0     /* Standard Card */
75 #define         DEVID_9005_TYPE_AAA             0x3     /* RAID Card */
76 #define         DEVID_9005_TYPE_SISL            0x5     /* Container ROMB */
77 #define         DEVID_9005_TYPE_MB              0xF     /* On Motherboard */
78
79 #define DEVID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
80 #define         DEVID_9005_MAXRATE_U160         0x0
81 #define         DEVID_9005_MAXRATE_ULTRA2       0x1
82 #define         DEVID_9005_MAXRATE_ULTRA        0x2
83 #define         DEVID_9005_MAXRATE_FAST         0x3
84
85 #define DEVID_9005_MFUNC(id) (((id) & 0x40) >> 6)
86
87 #define DEVID_9005_CLASS(id) (((id) & 0xFF00) >> 8)
88 #define         DEVID_9005_CLASS_SPI            0x0     /* Parallel SCSI */
89
90 #define SUBID_9005_TYPE(id) ((id) & 0xF)
91 #define         SUBID_9005_TYPE_MB              0xF     /* On Motherboard */
92 #define         SUBID_9005_TYPE_CARD            0x0     /* Standard Card */
93 #define         SUBID_9005_TYPE_LCCARD          0x1     /* Low Cost Card */
94 #define         SUBID_9005_TYPE_RAID            0x3     /* Combined with Raid */
95
96 #define SUBID_9005_TYPE_KNOWN(id)                       \
97           ((((id) & 0xF) == SUBID_9005_TYPE_MB)         \
98         || (((id) & 0xF) == SUBID_9005_TYPE_CARD)       \
99         || (((id) & 0xF) == SUBID_9005_TYPE_LCCARD)     \
100         || (((id) & 0xF) == SUBID_9005_TYPE_RAID))
101
102 #define SUBID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
103 #define         SUBID_9005_MAXRATE_ULTRA2       0x0
104 #define         SUBID_9005_MAXRATE_ULTRA        0x1
105 #define         SUBID_9005_MAXRATE_U160         0x2
106 #define         SUBID_9005_MAXRATE_RESERVED     0x3
107
108 #define SUBID_9005_SEEPTYPE(id)                                         \
109         ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
110          ? ((id) & 0xC0) >> 6                                           \
111          : ((id) & 0x300) >> 8)
112 #define         SUBID_9005_SEEPTYPE_NONE        0x0
113 #define         SUBID_9005_SEEPTYPE_1K          0x1
114 #define         SUBID_9005_SEEPTYPE_2K_4K       0x2
115 #define         SUBID_9005_SEEPTYPE_RESERVED    0x3
116 #define SUBID_9005_AUTOTERM(id)                                         \
117         ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
118          ? (((id) & 0x400) >> 10) == 0                                  \
119          : (((id) & 0x40) >> 6) == 0)
120
121 #define SUBID_9005_NUMCHAN(id)                                          \
122         ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
123          ? ((id) & 0x300) >> 8                                          \
124          : ((id) & 0xC00) >> 10)
125
126 #define SUBID_9005_LEGACYCONN(id)                                       \
127         ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
128          ? 0                                                            \
129          : ((id) & 0x80) >> 7)
130
131 #define SUBID_9005_MFUNCENB(id)                                         \
132         ((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)                    \
133          ? ((id) & 0x800) >> 11                                         \
134          : ((id) & 0x1000) >> 12)
135 /*
136  * Informational only. Should use chip register to be
137  * certain, but may be use in identification strings.
138  */
139 #define SUBID_9005_CARD_SCSIWIDTH_MASK  0x2000
140 #define SUBID_9005_CARD_PCIWIDTH_MASK   0x4000
141 #define SUBID_9005_CARD_SEDIFF_MASK     0x8000
142
143 static ahc_device_setup_t ahc_aic785X_setup;
144 static ahc_device_setup_t ahc_aic7860_setup;
145 static ahc_device_setup_t ahc_apa1480_setup;
146 static ahc_device_setup_t ahc_aic7870_setup;
147 static ahc_device_setup_t ahc_aha394X_setup;
148 static ahc_device_setup_t ahc_aha494X_setup;
149 static ahc_device_setup_t ahc_aha398X_setup;
150 static ahc_device_setup_t ahc_aic7880_setup;
151 static ahc_device_setup_t ahc_aha2940Pro_setup;
152 static ahc_device_setup_t ahc_aha394XU_setup;
153 static ahc_device_setup_t ahc_aha398XU_setup;
154 static ahc_device_setup_t ahc_aic7890_setup;
155 static ahc_device_setup_t ahc_aic7892_setup;
156 static ahc_device_setup_t ahc_aic7895_setup;
157 static ahc_device_setup_t ahc_aic7896_setup;
158 static ahc_device_setup_t ahc_aic7899_setup;
159 static ahc_device_setup_t ahc_aha29160C_setup;
160 static ahc_device_setup_t ahc_raid_setup;
161 static ahc_device_setup_t ahc_aha394XX_setup;
162 static ahc_device_setup_t ahc_aha494XX_setup;
163 static ahc_device_setup_t ahc_aha398XX_setup;
164
165 struct ahc_pci_identity ahc_pci_ident_table [] =
166 {
167         /* aic7850 based controllers */
168         {
169                 ID_AHA_2902_04_10_15_20C_30C,
170                 ID_ALL_MASK,
171                 "Adaptec 2902/04/10/15/20C/30C SCSI adapter",
172                 ahc_aic785X_setup
173         },
174         /* aic7860 based controllers */
175         {
176                 ID_AHA_2930CU,
177                 ID_ALL_MASK,
178                 "Adaptec 2930CU SCSI adapter",
179                 ahc_aic7860_setup
180         },
181         {
182                 ID_AHA_1480A & ID_DEV_VENDOR_MASK,
183                 ID_DEV_VENDOR_MASK,
184                 "Adaptec 1480A Ultra SCSI adapter",
185                 ahc_apa1480_setup
186         },
187         {
188                 ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK,
189                 ID_DEV_VENDOR_MASK,
190                 "Adaptec 2940A Ultra SCSI adapter",
191                 ahc_aic7860_setup
192         },
193         {
194                 ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK,
195                 ID_DEV_VENDOR_MASK,
196                 "Adaptec 2940A/CN Ultra SCSI adapter",
197                 ahc_aic7860_setup
198         },
199         {
200                 ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK,
201                 ID_DEV_VENDOR_MASK,
202                 "Adaptec 2930C Ultra SCSI adapter (VAR)",
203                 ahc_aic7860_setup
204         },
205         /* aic7870 based controllers */
206         {
207                 ID_AHA_2940,
208                 ID_ALL_MASK,
209                 "Adaptec 2940 SCSI adapter",
210                 ahc_aic7870_setup
211         },
212         {
213                 ID_AHA_3940,
214                 ID_ALL_MASK,
215                 "Adaptec 3940 SCSI adapter",
216                 ahc_aha394X_setup
217         },
218         {
219                 ID_AHA_398X,
220                 ID_ALL_MASK,
221                 "Adaptec 398X SCSI RAID adapter",
222                 ahc_aha398X_setup
223         },
224         {
225                 ID_AHA_2944,
226                 ID_ALL_MASK,
227                 "Adaptec 2944 SCSI adapter",
228                 ahc_aic7870_setup
229         },
230         {
231                 ID_AHA_3944,
232                 ID_ALL_MASK,
233                 "Adaptec 3944 SCSI adapter",
234                 ahc_aha394X_setup
235         },
236         {
237                 ID_AHA_4944,
238                 ID_ALL_MASK,
239                 "Adaptec 4944 SCSI adapter",
240                 ahc_aha494X_setup
241         },
242         /* aic7880 based controllers */
243         {
244                 ID_AHA_2940U & ID_DEV_VENDOR_MASK,
245                 ID_DEV_VENDOR_MASK,
246                 "Adaptec 2940 Ultra SCSI adapter",
247                 ahc_aic7880_setup
248         },
249         {
250                 ID_AHA_3940U & ID_DEV_VENDOR_MASK,
251                 ID_DEV_VENDOR_MASK,
252                 "Adaptec 3940 Ultra SCSI adapter",
253                 ahc_aha394XU_setup
254         },
255         {
256                 ID_AHA_2944U & ID_DEV_VENDOR_MASK,
257                 ID_DEV_VENDOR_MASK,
258                 "Adaptec 2944 Ultra SCSI adapter",
259                 ahc_aic7880_setup
260         },
261         {
262                 ID_AHA_3944U & ID_DEV_VENDOR_MASK,
263                 ID_DEV_VENDOR_MASK,
264                 "Adaptec 3944 Ultra SCSI adapter",
265                 ahc_aha394XU_setup
266         },
267         {
268                 ID_AHA_398XU & ID_DEV_VENDOR_MASK,
269                 ID_DEV_VENDOR_MASK,
270                 "Adaptec 398X Ultra SCSI RAID adapter",
271                 ahc_aha398XU_setup
272         },
273         {
274                 /*
275                  * XXX Don't know the slot numbers
276                  * so we can't identify channels
277                  */
278                 ID_AHA_4944U & ID_DEV_VENDOR_MASK,
279                 ID_DEV_VENDOR_MASK,
280                 "Adaptec 4944 Ultra SCSI adapter",
281                 ahc_aic7880_setup
282         },
283         {
284                 ID_AHA_2930U & ID_DEV_VENDOR_MASK,
285                 ID_DEV_VENDOR_MASK,
286                 "Adaptec 2930 Ultra SCSI adapter",
287                 ahc_aic7880_setup
288         },
289         {
290                 ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK,
291                 ID_DEV_VENDOR_MASK,
292                 "Adaptec 2940 Pro Ultra SCSI adapter",
293                 ahc_aha2940Pro_setup
294         },
295         {
296                 ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK,
297                 ID_DEV_VENDOR_MASK,
298                 "Adaptec 2940/CN Ultra SCSI adapter",
299                 ahc_aic7880_setup
300         },
301         /* Ignore all SISL (AAC on MB) based controllers. */
302         {
303                 ID_9005_SISL_ID,
304                 ID_9005_SISL_MASK,
305                 NULL,
306                 NULL
307         },
308         /* aic7890 based controllers */
309         {
310                 ID_AHA_2930U2,
311                 ID_ALL_MASK,
312                 "Adaptec 2930 Ultra2 SCSI adapter",
313                 ahc_aic7890_setup
314         },
315         {
316                 ID_AHA_2940U2B,
317                 ID_ALL_MASK,
318                 "Adaptec 2940B Ultra2 SCSI adapter",
319                 ahc_aic7890_setup
320         },
321         {
322                 ID_AHA_2940U2_OEM,
323                 ID_ALL_MASK,
324                 "Adaptec 2940 Ultra2 SCSI adapter (OEM)",
325                 ahc_aic7890_setup
326         },
327         {
328                 ID_AHA_2940U2,
329                 ID_ALL_MASK,
330                 "Adaptec 2940 Ultra2 SCSI adapter",
331                 ahc_aic7890_setup
332         },
333         {
334                 ID_AHA_2950U2B,
335                 ID_ALL_MASK,
336                 "Adaptec 2950 Ultra2 SCSI adapter",
337                 ahc_aic7890_setup
338         },
339         {
340                 ID_AIC7890_ARO,
341                 ID_ALL_MASK,
342                 "Adaptec aic7890/91 Ultra2 SCSI adapter (ARO)",
343                 ahc_aic7890_setup
344         },
345         {
346                 ID_AAA_131U2,
347                 ID_ALL_MASK,
348                 "Adaptec AAA-131 Ultra2 RAID adapter",
349                 ahc_aic7890_setup
350         },
351         /* aic7892 based controllers */
352         {
353                 ID_AHA_29160,
354                 ID_ALL_MASK,
355                 "Adaptec 29160 Ultra160 SCSI adapter",
356                 ahc_aic7892_setup
357         },
358         {
359                 ID_AHA_29160_CPQ,
360                 ID_ALL_MASK,
361                 "Adaptec (Compaq OEM) 29160 Ultra160 SCSI adapter",
362                 ahc_aic7892_setup
363         },
364         {
365                 ID_AHA_29160N,
366                 ID_ALL_MASK,
367                 "Adaptec 29160N Ultra160 SCSI adapter",
368                 ahc_aic7892_setup
369         },
370         {
371                 ID_AHA_29160C,
372                 ID_ALL_MASK,
373                 "Adaptec 29160C Ultra160 SCSI adapter",
374                 ahc_aha29160C_setup
375         },
376         {
377                 ID_AHA_29160B,
378                 ID_ALL_MASK,
379                 "Adaptec 29160B Ultra160 SCSI adapter",
380                 ahc_aic7892_setup
381         },
382         {
383                 ID_AHA_19160B,
384                 ID_ALL_MASK,
385                 "Adaptec 19160B Ultra160 SCSI adapter",
386                 ahc_aic7892_setup
387         },
388         {
389                 ID_AIC7892_ARO,
390                 ID_ALL_MASK,
391                 "Adaptec aic7892 Ultra160 SCSI adapter (ARO)",
392                 ahc_aic7892_setup
393         },
394         {
395                 ID_AHA_2915_30LP,
396                 ID_ALL_MASK,
397                 "Adaptec 2915/30LP Ultra160 SCSI adapter",
398                 ahc_aic7892_setup
399         },
400         /* aic7895 based controllers */ 
401         {
402                 ID_AHA_2940U_DUAL,
403                 ID_ALL_MASK,
404                 "Adaptec 2940/DUAL Ultra SCSI adapter",
405                 ahc_aic7895_setup
406         },
407         {
408                 ID_AHA_3940AU,
409                 ID_ALL_MASK,
410                 "Adaptec 3940A Ultra SCSI adapter",
411                 ahc_aic7895_setup
412         },
413         {
414                 ID_AHA_3944AU,
415                 ID_ALL_MASK,
416                 "Adaptec 3944A Ultra SCSI adapter",
417                 ahc_aic7895_setup
418         },
419         {
420                 ID_AIC7895_ARO,
421                 ID_AIC7895_ARO_MASK,
422                 "Adaptec aic7895 Ultra SCSI adapter (ARO)",
423                 ahc_aic7895_setup
424         },
425         /* aic7896/97 based controllers */      
426         {
427                 ID_AHA_3950U2B_0,
428                 ID_ALL_MASK,
429                 "Adaptec 3950B Ultra2 SCSI adapter",
430                 ahc_aic7896_setup
431         },
432         {
433                 ID_AHA_3950U2B_1,
434                 ID_ALL_MASK,
435                 "Adaptec 3950B Ultra2 SCSI adapter",
436                 ahc_aic7896_setup
437         },
438         {
439                 ID_AHA_3950U2D_0,
440                 ID_ALL_MASK,
441                 "Adaptec 3950D Ultra2 SCSI adapter",
442                 ahc_aic7896_setup
443         },
444         {
445                 ID_AHA_3950U2D_1,
446                 ID_ALL_MASK,
447                 "Adaptec 3950D Ultra2 SCSI adapter",
448                 ahc_aic7896_setup
449         },
450         {
451                 ID_AIC7896_ARO,
452                 ID_ALL_MASK,
453                 "Adaptec aic7896/97 Ultra2 SCSI adapter (ARO)",
454                 ahc_aic7896_setup
455         },
456         /* aic7899 based controllers */ 
457         {
458                 ID_AHA_3960D,
459                 ID_ALL_MASK,
460                 "Adaptec 3960D Ultra160 SCSI adapter",
461                 ahc_aic7899_setup
462         },
463         {
464                 ID_AHA_3960D_CPQ,
465                 ID_ALL_MASK,
466                 "Adaptec (Compaq OEM) 3960D Ultra160 SCSI adapter",
467                 ahc_aic7899_setup
468         },
469         {
470                 ID_AIC7899_ARO,
471                 ID_ALL_MASK,
472                 "Adaptec aic7899 Ultra160 SCSI adapter (ARO)",
473                 ahc_aic7899_setup
474         },
475         /* Generic chip probes for devices we don't know 'exactly' */
476         {
477                 ID_AIC7850 & ID_DEV_VENDOR_MASK,
478                 ID_DEV_VENDOR_MASK,
479                 "Adaptec aic7850 SCSI adapter",
480                 ahc_aic785X_setup
481         },
482         {
483                 ID_AIC7855 & ID_DEV_VENDOR_MASK,
484                 ID_DEV_VENDOR_MASK,
485                 "Adaptec aic7855 SCSI adapter",
486                 ahc_aic785X_setup
487         },
488         {
489                 ID_AIC7859 & ID_DEV_VENDOR_MASK,
490                 ID_DEV_VENDOR_MASK,
491                 "Adaptec aic7859 SCSI adapter",
492                 ahc_aic7860_setup
493         },
494         {
495                 ID_AIC7860 & ID_DEV_VENDOR_MASK,
496                 ID_DEV_VENDOR_MASK,
497                 "Adaptec aic7860 Ultra SCSI adapter",
498                 ahc_aic7860_setup
499         },
500         {
501                 ID_AIC7870 & ID_DEV_VENDOR_MASK,
502                 ID_DEV_VENDOR_MASK,
503                 "Adaptec aic7870 SCSI adapter",
504                 ahc_aic7870_setup
505         },
506         {
507                 ID_AIC7880 & ID_DEV_VENDOR_MASK,
508                 ID_DEV_VENDOR_MASK,
509                 "Adaptec aic7880 Ultra SCSI adapter",
510                 ahc_aic7880_setup
511         },
512         {
513                 ID_AIC7890 & ID_9005_GENERIC_MASK,
514                 ID_9005_GENERIC_MASK,
515                 "Adaptec aic7890/91 Ultra2 SCSI adapter",
516                 ahc_aic7890_setup
517         },
518         {
519                 ID_AIC7892 & ID_9005_GENERIC_MASK,
520                 ID_9005_GENERIC_MASK,
521                 "Adaptec aic7892 Ultra160 SCSI adapter",
522                 ahc_aic7892_setup
523         },
524         {
525                 ID_AIC7895 & ID_DEV_VENDOR_MASK,
526                 ID_DEV_VENDOR_MASK,
527                 "Adaptec aic7895 Ultra SCSI adapter",
528                 ahc_aic7895_setup
529         },
530         {
531                 ID_AIC7896 & ID_9005_GENERIC_MASK,
532                 ID_9005_GENERIC_MASK,
533                 "Adaptec aic7896/97 Ultra2 SCSI adapter",
534                 ahc_aic7896_setup
535         },
536         {
537                 ID_AIC7899 & ID_9005_GENERIC_MASK,
538                 ID_9005_GENERIC_MASK,
539                 "Adaptec aic7899 Ultra160 SCSI adapter",
540                 ahc_aic7899_setup
541         },
542         {
543                 ID_AIC7810 & ID_DEV_VENDOR_MASK,
544                 ID_DEV_VENDOR_MASK,
545                 "Adaptec aic7810 RAID memory controller",
546                 ahc_raid_setup
547         },
548         {
549                 ID_AIC7815 & ID_DEV_VENDOR_MASK,
550                 ID_DEV_VENDOR_MASK,
551                 "Adaptec aic7815 RAID memory controller",
552                 ahc_raid_setup
553         }
554 };
555
556 const u_int ahc_num_pci_devs = ARRAY_SIZE(ahc_pci_ident_table);
557                 
558 #define AHC_394X_SLOT_CHANNEL_A 4
559 #define AHC_394X_SLOT_CHANNEL_B 5
560
561 #define AHC_398X_SLOT_CHANNEL_A 4
562 #define AHC_398X_SLOT_CHANNEL_B 8
563 #define AHC_398X_SLOT_CHANNEL_C 12
564
565 #define AHC_494X_SLOT_CHANNEL_A 4
566 #define AHC_494X_SLOT_CHANNEL_B 5
567 #define AHC_494X_SLOT_CHANNEL_C 6
568 #define AHC_494X_SLOT_CHANNEL_D 7
569
570 #define DEVCONFIG               0x40
571 #define         PCIERRGENDIS    0x80000000ul
572 #define         SCBSIZE32       0x00010000ul    /* aic789X only */
573 #define         REXTVALID       0x00001000ul    /* ultra cards only */
574 #define         MPORTMODE       0x00000400ul    /* aic7870+ only */
575 #define         RAMPSM          0x00000200ul    /* aic7870+ only */
576 #define         VOLSENSE        0x00000100ul
577 #define         PCI64BIT        0x00000080ul    /* 64Bit PCI bus (Ultra2 Only)*/
578 #define         SCBRAMSEL       0x00000080ul
579 #define         MRDCEN          0x00000040ul
580 #define         EXTSCBTIME      0x00000020ul    /* aic7870 only */
581 #define         EXTSCBPEN       0x00000010ul    /* aic7870 only */
582 #define         BERREN          0x00000008ul
583 #define         DACEN           0x00000004ul
584 #define         STPWLEVEL       0x00000002ul
585 #define         DIFACTNEGEN     0x00000001ul    /* aic7870 only */
586
587 #define CSIZE_LATTIME           0x0c
588 #define         CACHESIZE       0x0000003ful    /* only 5 bits */
589 #define         LATTIME         0x0000ff00ul
590
591 /* PCI STATUS definitions */
592 #define DPE     0x80
593 #define SSE     0x40
594 #define RMA     0x20
595 #define RTA     0x10
596 #define STA     0x08
597 #define DPR     0x01
598
599 static int ahc_9005_subdevinfo_valid(uint16_t vendor, uint16_t device,
600                                      uint16_t subvendor, uint16_t subdevice);
601 static int ahc_ext_scbram_present(struct ahc_softc *ahc);
602 static void ahc_scbram_config(struct ahc_softc *ahc, int enable,
603                                   int pcheck, int fast, int large);
604 static void ahc_probe_ext_scbram(struct ahc_softc *ahc);
605 static void check_extport(struct ahc_softc *ahc, u_int *sxfrctl1);
606 static void ahc_parse_pci_eeprom(struct ahc_softc *ahc,
607                                  struct seeprom_config *sc);
608 static void configure_termination(struct ahc_softc *ahc,
609                                   struct seeprom_descriptor *sd,
610                                   u_int adapter_control,
611                                   u_int *sxfrctl1);
612
613 static void ahc_new_term_detect(struct ahc_softc *ahc,
614                                 int *enableSEC_low,
615                                 int *enableSEC_high,
616                                 int *enablePRI_low,
617                                 int *enablePRI_high,
618                                 int *eeprom_present);
619 static void aic787X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
620                                  int *internal68_present,
621                                  int *externalcable_present,
622                                  int *eeprom_present);
623 static void aic785X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
624                                  int *externalcable_present,
625                                  int *eeprom_present);
626 static void    write_brdctl(struct ahc_softc *ahc, uint8_t value);
627 static uint8_t read_brdctl(struct ahc_softc *ahc);
628 static void ahc_pci_intr(struct ahc_softc *ahc);
629 static int  ahc_pci_chip_init(struct ahc_softc *ahc);
630 static int  ahc_pci_suspend(struct ahc_softc *ahc);
631 static int  ahc_pci_resume(struct ahc_softc *ahc);
632
633 static int
634 ahc_9005_subdevinfo_valid(uint16_t device, uint16_t vendor,
635                           uint16_t subdevice, uint16_t subvendor)
636 {
637         int result;
638
639         /* Default to invalid. */
640         result = 0;
641         if (vendor == 0x9005
642          && subvendor == 0x9005
643          && subdevice != device
644          && SUBID_9005_TYPE_KNOWN(subdevice) != 0) {
645
646                 switch (SUBID_9005_TYPE(subdevice)) {
647                 case SUBID_9005_TYPE_MB:
648                         break;
649                 case SUBID_9005_TYPE_CARD:
650                 case SUBID_9005_TYPE_LCCARD:
651                         /*
652                          * Currently only trust Adaptec cards to
653                          * get the sub device info correct.
654                          */
655                         if (DEVID_9005_TYPE(device) == DEVID_9005_TYPE_HBA)
656                                 result = 1;
657                         break;
658                 case SUBID_9005_TYPE_RAID:
659                         break;
660                 default:
661                         break;
662                 }
663         }
664         return (result);
665 }
666
667 struct ahc_pci_identity *
668 ahc_find_pci_device(ahc_dev_softc_t pci)
669 {
670         uint64_t  full_id;
671         uint16_t  device;
672         uint16_t  vendor;
673         uint16_t  subdevice;
674         uint16_t  subvendor;
675         struct    ahc_pci_identity *entry;
676         u_int     i;
677
678         vendor = ahc_pci_read_config(pci, PCIR_DEVVENDOR, /*bytes*/2);
679         device = ahc_pci_read_config(pci, PCIR_DEVICE, /*bytes*/2);
680         subvendor = ahc_pci_read_config(pci, PCIR_SUBVEND_0, /*bytes*/2);
681         subdevice = ahc_pci_read_config(pci, PCIR_SUBDEV_0, /*bytes*/2);
682         full_id = ahc_compose_id(device, vendor, subdevice, subvendor);
683
684         /*
685          * If the second function is not hooked up, ignore it.
686          * Unfortunately, not all MB vendors implement the
687          * subdevice ID as per the Adaptec spec, so do our best
688          * to sanity check it prior to accepting the subdevice
689          * ID as valid.
690          */
691         if (ahc_get_pci_function(pci) > 0
692          && ahc_9005_subdevinfo_valid(vendor, device, subvendor, subdevice)
693          && SUBID_9005_MFUNCENB(subdevice) == 0)
694                 return (NULL);
695
696         for (i = 0; i < ahc_num_pci_devs; i++) {
697                 entry = &ahc_pci_ident_table[i];
698                 if (entry->full_id == (full_id & entry->id_mask)) {
699                         /* Honor exclusion entries. */
700                         if (entry->name == NULL)
701                                 return (NULL);
702                         return (entry);
703                 }
704         }
705         return (NULL);
706 }
707
708 int
709 ahc_pci_config(struct ahc_softc *ahc, struct ahc_pci_identity *entry)
710 {
711         u_int    command;
712         u_int    our_id;
713         u_int    sxfrctl1;
714         u_int    scsiseq;
715         u_int    dscommand0;
716         uint32_t devconfig;
717         int      error;
718         uint8_t  sblkctl;
719
720         our_id = 0;
721         error = entry->setup(ahc);
722         if (error != 0)
723                 return (error);
724         ahc->chip |= AHC_PCI;
725         ahc->description = entry->name;
726
727         pci_set_power_state(ahc->dev_softc, AHC_POWER_STATE_D0);
728
729         error = ahc_pci_map_registers(ahc);
730         if (error != 0)
731                 return (error);
732
733         /*
734          * Before we continue probing the card, ensure that
735          * its interrupts are *disabled*.  We don't want
736          * a misstep to hang the machine in an interrupt
737          * storm.
738          */
739         ahc_intr_enable(ahc, FALSE);
740
741         devconfig = ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);
742
743         /*
744          * If we need to support high memory, enable dual
745          * address cycles.  This bit must be set to enable
746          * high address bit generation even if we are on a
747          * 64bit bus (PCI64BIT set in devconfig).
748          */
749         if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
750
751                 if (bootverbose)
752                         printf("%s: Enabling 39Bit Addressing\n",
753                                ahc_name(ahc));
754                 devconfig |= DACEN;
755         }
756         
757         /* Ensure that pci error generation, a test feature, is disabled. */
758         devconfig |= PCIERRGENDIS;
759
760         ahc_pci_write_config(ahc->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
761
762         /* Ensure busmastering is enabled */
763         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/2);
764         command |= PCIM_CMD_BUSMASTEREN;
765
766         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, /*bytes*/2);
767
768         /* On all PCI adapters, we allow SCB paging */
769         ahc->flags |= AHC_PAGESCBS;
770
771         error = ahc_softc_init(ahc);
772         if (error != 0)
773                 return (error);
774
775         /*
776          * Disable PCI parity error checking.  Users typically
777          * do this to work around broken PCI chipsets that get
778          * the parity timing wrong and thus generate lots of spurious
779          * errors.  The chip only allows us to disable *all* parity
780          * error reporting when doing this, so CIO bus, scb ram, and
781          * scratch ram parity errors will be ignored too.
782          */
783         if ((ahc->flags & AHC_DISABLE_PCI_PERR) != 0)
784                 ahc->seqctl |= FAILDIS;
785
786         ahc->bus_intr = ahc_pci_intr;
787         ahc->bus_chip_init = ahc_pci_chip_init;
788         ahc->bus_suspend = ahc_pci_suspend;
789         ahc->bus_resume = ahc_pci_resume;
790
791         /* Remeber how the card was setup in case there is no SEEPROM */
792         if ((ahc_inb(ahc, HCNTRL) & POWRDN) == 0) {
793                 ahc_pause(ahc);
794                 if ((ahc->features & AHC_ULTRA2) != 0)
795                         our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
796                 else
797                         our_id = ahc_inb(ahc, SCSIID) & OID;
798                 sxfrctl1 = ahc_inb(ahc, SXFRCTL1) & STPWEN;
799                 scsiseq = ahc_inb(ahc, SCSISEQ);
800         } else {
801                 sxfrctl1 = STPWEN;
802                 our_id = 7;
803                 scsiseq = 0;
804         }
805
806         error = ahc_reset(ahc, /*reinit*/FALSE);
807         if (error != 0)
808                 return (ENXIO);
809
810         if ((ahc->features & AHC_DT) != 0) {
811                 u_int sfunct;
812
813                 /* Perform ALT-Mode Setup */
814                 sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
815                 ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
816                 ahc_outb(ahc, OPTIONMODE,
817                          OPTIONMODE_DEFAULTS|AUTOACKEN|BUSFREEREV|EXPPHASEDIS);
818                 ahc_outb(ahc, SFUNCT, sfunct);
819
820                 /* Normal mode setup */
821                 ahc_outb(ahc, CRCCONTROL1, CRCVALCHKEN|CRCENDCHKEN|CRCREQCHKEN
822                                           |TARGCRCENDEN);
823         }
824
825         dscommand0 = ahc_inb(ahc, DSCOMMAND0);
826         dscommand0 |= MPARCKEN|CACHETHEN;
827         if ((ahc->features & AHC_ULTRA2) != 0) {
828
829                 /*
830                  * DPARCKEN doesn't work correctly on
831                  * some MBs so don't use it.
832                  */
833                 dscommand0 &= ~DPARCKEN;
834         }
835
836         /*
837          * Handle chips that must have cache line
838          * streaming (dis/en)abled.
839          */
840         if ((ahc->bugs & AHC_CACHETHEN_DIS_BUG) != 0)
841                 dscommand0 |= CACHETHEN;
842
843         if ((ahc->bugs & AHC_CACHETHEN_BUG) != 0)
844                 dscommand0 &= ~CACHETHEN;
845
846         ahc_outb(ahc, DSCOMMAND0, dscommand0);
847
848         ahc->pci_cachesize =
849             ahc_pci_read_config(ahc->dev_softc, CSIZE_LATTIME,
850                                 /*bytes*/1) & CACHESIZE;
851         ahc->pci_cachesize *= 4;
852
853         if ((ahc->bugs & AHC_PCI_2_1_RETRY_BUG) != 0
854          && ahc->pci_cachesize == 4) {
855
856                 ahc_pci_write_config(ahc->dev_softc, CSIZE_LATTIME,
857                                      0, /*bytes*/1);
858                 ahc->pci_cachesize = 0;
859         }
860
861         /*
862          * We cannot perform ULTRA speeds without the presense
863          * of the external precision resistor.
864          */
865         if ((ahc->features & AHC_ULTRA) != 0) {
866                 uint32_t devconfig;
867
868                 devconfig = ahc_pci_read_config(ahc->dev_softc,
869                                                 DEVCONFIG, /*bytes*/4);
870                 if ((devconfig & REXTVALID) == 0)
871                         ahc->features &= ~AHC_ULTRA;
872         }
873
874         /* See if we have a SEEPROM and perform auto-term */
875         check_extport(ahc, &sxfrctl1);
876
877         /*
878          * Take the LED out of diagnostic mode
879          */
880         sblkctl = ahc_inb(ahc, SBLKCTL);
881         ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
882
883         if ((ahc->features & AHC_ULTRA2) != 0) {
884                 ahc_outb(ahc, DFF_THRSH, RD_DFTHRSH_MAX|WR_DFTHRSH_MAX);
885         } else {
886                 ahc_outb(ahc, DSPCISTATUS, DFTHRSH_100);
887         }
888
889         if (ahc->flags & AHC_USEDEFAULTS) {
890                 /*
891                  * PCI Adapter default setup
892                  * Should only be used if the adapter does not have
893                  * a SEEPROM.
894                  */
895                 /* See if someone else set us up already */
896                 if ((ahc->flags & AHC_NO_BIOS_INIT) == 0
897                  && scsiseq != 0) {
898                         printf("%s: Using left over BIOS settings\n",
899                                 ahc_name(ahc));
900                         ahc->flags &= ~AHC_USEDEFAULTS;
901                         ahc->flags |= AHC_BIOS_ENABLED;
902                 } else {
903                         /*
904                          * Assume only one connector and always turn
905                          * on termination.
906                          */
907                         our_id = 0x07;
908                         sxfrctl1 = STPWEN;
909                 }
910                 ahc_outb(ahc, SCSICONF, our_id|ENSPCHK|RESET_SCSI);
911
912                 ahc->our_id = our_id;
913         }
914
915         /*
916          * Take a look to see if we have external SRAM.
917          * We currently do not attempt to use SRAM that is
918          * shared among multiple controllers.
919          */
920         ahc_probe_ext_scbram(ahc);
921
922         /*
923          * Record our termination setting for the
924          * generic initialization routine.
925          */
926         if ((sxfrctl1 & STPWEN) != 0)
927                 ahc->flags |= AHC_TERM_ENB_A;
928
929         /*
930          * Save chip register configuration data for chip resets
931          * that occur during runtime and resume events.
932          */
933         ahc->bus_softc.pci_softc.devconfig =
934             ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);
935         ahc->bus_softc.pci_softc.command =
936             ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
937         ahc->bus_softc.pci_softc.csize_lattime =
938             ahc_pci_read_config(ahc->dev_softc, CSIZE_LATTIME, /*bytes*/1);
939         ahc->bus_softc.pci_softc.dscommand0 = ahc_inb(ahc, DSCOMMAND0);
940         ahc->bus_softc.pci_softc.dspcistatus = ahc_inb(ahc, DSPCISTATUS);
941         if ((ahc->features & AHC_DT) != 0) {
942                 u_int sfunct;
943
944                 sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
945                 ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
946                 ahc->bus_softc.pci_softc.optionmode = ahc_inb(ahc, OPTIONMODE);
947                 ahc->bus_softc.pci_softc.targcrccnt = ahc_inw(ahc, TARGCRCCNT);
948                 ahc_outb(ahc, SFUNCT, sfunct);
949                 ahc->bus_softc.pci_softc.crccontrol1 =
950                     ahc_inb(ahc, CRCCONTROL1);
951         }
952         if ((ahc->features & AHC_MULTI_FUNC) != 0)
953                 ahc->bus_softc.pci_softc.scbbaddr = ahc_inb(ahc, SCBBADDR);
954
955         if ((ahc->features & AHC_ULTRA2) != 0)
956                 ahc->bus_softc.pci_softc.dff_thrsh = ahc_inb(ahc, DFF_THRSH);
957
958         /* Core initialization */
959         error = ahc_init(ahc);
960         if (error != 0)
961                 return (error);
962
963         /*
964          * Allow interrupts now that we are completely setup.
965          */
966         error = ahc_pci_map_int(ahc);
967         if (error != 0)
968                 return (error);
969
970         ahc->init_level++;
971         return (0);
972 }
973
974 /*
975  * Test for the presense of external sram in an
976  * "unshared" configuration.
977  */
978 static int
979 ahc_ext_scbram_present(struct ahc_softc *ahc)
980 {
981         u_int chip;
982         int ramps;
983         int single_user;
984         uint32_t devconfig;
985
986         chip = ahc->chip & AHC_CHIPID_MASK;
987         devconfig = ahc_pci_read_config(ahc->dev_softc,
988                                         DEVCONFIG, /*bytes*/4);
989         single_user = (devconfig & MPORTMODE) != 0;
990
991         if ((ahc->features & AHC_ULTRA2) != 0)
992                 ramps = (ahc_inb(ahc, DSCOMMAND0) & RAMPS) != 0;
993         else if (chip == AHC_AIC7895 || chip == AHC_AIC7895C)
994                 /*
995                  * External SCBRAM arbitration is flakey
996                  * on these chips.  Unfortunately this means
997                  * we don't use the extra SCB ram space on the
998                  * 3940AUW.
999                  */
1000                 ramps = 0;
1001         else if (chip >= AHC_AIC7870)
1002                 ramps = (devconfig & RAMPSM) != 0;
1003         else
1004                 ramps = 0;
1005
1006         if (ramps && single_user)
1007                 return (1);
1008         return (0);
1009 }
1010
1011 /*
1012  * Enable external scbram.
1013  */
1014 static void
1015 ahc_scbram_config(struct ahc_softc *ahc, int enable, int pcheck,
1016                   int fast, int large)
1017 {
1018         uint32_t devconfig;
1019
1020         if (ahc->features & AHC_MULTI_FUNC) {
1021                 /*
1022                  * Set the SCB Base addr (highest address bit)
1023                  * depending on which channel we are.
1024                  */
1025                 ahc_outb(ahc, SCBBADDR, ahc_get_pci_function(ahc->dev_softc));
1026         }
1027
1028         ahc->flags &= ~AHC_LSCBS_ENABLED;
1029         if (large)
1030                 ahc->flags |= AHC_LSCBS_ENABLED;
1031         devconfig = ahc_pci_read_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4);
1032         if ((ahc->features & AHC_ULTRA2) != 0) {
1033                 u_int dscommand0;
1034
1035                 dscommand0 = ahc_inb(ahc, DSCOMMAND0);
1036                 if (enable)
1037                         dscommand0 &= ~INTSCBRAMSEL;
1038                 else
1039                         dscommand0 |= INTSCBRAMSEL;
1040                 if (large)
1041                         dscommand0 &= ~USCBSIZE32;
1042                 else
1043                         dscommand0 |= USCBSIZE32;
1044                 ahc_outb(ahc, DSCOMMAND0, dscommand0);
1045         } else {
1046                 if (fast)
1047                         devconfig &= ~EXTSCBTIME;
1048                 else
1049                         devconfig |= EXTSCBTIME;
1050                 if (enable)
1051                         devconfig &= ~SCBRAMSEL;
1052                 else
1053                         devconfig |= SCBRAMSEL;
1054                 if (large)
1055                         devconfig &= ~SCBSIZE32;
1056                 else
1057                         devconfig |= SCBSIZE32;
1058         }
1059         if (pcheck)
1060                 devconfig |= EXTSCBPEN;
1061         else
1062                 devconfig &= ~EXTSCBPEN;
1063
1064         ahc_pci_write_config(ahc->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
1065 }
1066
1067 /*
1068  * Take a look to see if we have external SRAM.
1069  * We currently do not attempt to use SRAM that is
1070  * shared among multiple controllers.
1071  */
1072 static void
1073 ahc_probe_ext_scbram(struct ahc_softc *ahc)
1074 {
1075         int num_scbs;
1076         int test_num_scbs;
1077         int enable;
1078         int pcheck;
1079         int fast;
1080         int large;
1081
1082         enable = FALSE;
1083         pcheck = FALSE;
1084         fast = FALSE;
1085         large = FALSE;
1086         num_scbs = 0;
1087         
1088         if (ahc_ext_scbram_present(ahc) == 0)
1089                 goto done;
1090
1091         /*
1092          * Probe for the best parameters to use.
1093          */
1094         ahc_scbram_config(ahc, /*enable*/TRUE, pcheck, fast, large);
1095         num_scbs = ahc_probe_scbs(ahc);
1096         if (num_scbs == 0) {
1097                 /* The SRAM wasn't really present. */
1098                 goto done;
1099         }
1100         enable = TRUE;
1101
1102         /*
1103          * Clear any outstanding parity error
1104          * and ensure that parity error reporting
1105          * is enabled.
1106          */
1107         ahc_outb(ahc, SEQCTL, 0);
1108         ahc_outb(ahc, CLRINT, CLRPARERR);
1109         ahc_outb(ahc, CLRINT, CLRBRKADRINT);
1110
1111         /* Now see if we can do parity */
1112         ahc_scbram_config(ahc, enable, /*pcheck*/TRUE, fast, large);
1113         num_scbs = ahc_probe_scbs(ahc);
1114         if ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
1115          || (ahc_inb(ahc, ERROR) & MPARERR) == 0)
1116                 pcheck = TRUE;
1117
1118         /* Clear any resulting parity error */
1119         ahc_outb(ahc, CLRINT, CLRPARERR);
1120         ahc_outb(ahc, CLRINT, CLRBRKADRINT);
1121
1122         /* Now see if we can do fast timing */
1123         ahc_scbram_config(ahc, enable, pcheck, /*fast*/TRUE, large);
1124         test_num_scbs = ahc_probe_scbs(ahc);
1125         if (test_num_scbs == num_scbs
1126          && ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
1127           || (ahc_inb(ahc, ERROR) & MPARERR) == 0))
1128                 fast = TRUE;
1129
1130         /*
1131          * See if we can use large SCBs and still maintain
1132          * the same overall count of SCBs.
1133          */
1134         if ((ahc->features & AHC_LARGE_SCBS) != 0) {
1135                 ahc_scbram_config(ahc, enable, pcheck, fast, /*large*/TRUE);
1136                 test_num_scbs = ahc_probe_scbs(ahc);
1137                 if (test_num_scbs >= num_scbs) {
1138                         large = TRUE;
1139                         num_scbs = test_num_scbs;
1140                         if (num_scbs >= 64) {
1141                                 /*
1142                                  * We have enough space to move the
1143                                  * "busy targets table" into SCB space
1144                                  * and make it qualify all the way to the
1145                                  * lun level.
1146                                  */
1147                                 ahc->flags |= AHC_SCB_BTT;
1148                         }
1149                 }
1150         }
1151 done:
1152         /*
1153          * Disable parity error reporting until we
1154          * can load instruction ram.
1155          */
1156         ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
1157         /* Clear any latched parity error */
1158         ahc_outb(ahc, CLRINT, CLRPARERR);
1159         ahc_outb(ahc, CLRINT, CLRBRKADRINT);
1160         if (bootverbose && enable) {
1161                 printf("%s: External SRAM, %s access%s, %dbytes/SCB\n",
1162                        ahc_name(ahc), fast ? "fast" : "slow", 
1163                        pcheck ? ", parity checking enabled" : "",
1164                        large ? 64 : 32);
1165         }
1166         ahc_scbram_config(ahc, enable, pcheck, fast, large);
1167 }
1168
1169 /*
1170  * Perform some simple tests that should catch situations where
1171  * our registers are invalidly mapped.
1172  */
1173 int
1174 ahc_pci_test_register_access(struct ahc_softc *ahc)
1175 {
1176         int      error;
1177         u_int    status1;
1178         uint32_t cmd;
1179         uint8_t  hcntrl;
1180
1181         error = EIO;
1182
1183         /*
1184          * Enable PCI error interrupt status, but suppress NMIs
1185          * generated by SERR raised due to target aborts.
1186          */
1187         cmd = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/2);
1188         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
1189                              cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
1190
1191         /*
1192          * First a simple test to see if any
1193          * registers can be read.  Reading
1194          * HCNTRL has no side effects and has
1195          * at least one bit that is guaranteed to
1196          * be zero so it is a good register to
1197          * use for this test.
1198          */
1199         hcntrl = ahc_inb(ahc, HCNTRL);
1200
1201         if (hcntrl == 0xFF)
1202                 goto fail;
1203
1204         if ((hcntrl & CHIPRST) != 0) {
1205                 /*
1206                  * The chip has not been initialized since
1207                  * PCI/EISA/VLB bus reset.  Don't trust
1208                  * "left over BIOS data".
1209                  */
1210                 ahc->flags |= AHC_NO_BIOS_INIT;
1211         }
1212
1213         /*
1214          * Next create a situation where write combining
1215          * or read prefetching could be initiated by the
1216          * CPU or host bridge.  Our device does not support
1217          * either, so look for data corruption and/or flagged
1218          * PCI errors.  First pause without causing another
1219          * chip reset.
1220          */
1221         hcntrl &= ~CHIPRST;
1222         ahc_outb(ahc, HCNTRL, hcntrl|PAUSE);
1223         while (ahc_is_paused(ahc) == 0)
1224                 ;
1225
1226         /* Clear any PCI errors that occurred before our driver attached. */
1227         status1 = ahc_pci_read_config(ahc->dev_softc,
1228                                       PCIR_STATUS + 1, /*bytes*/1);
1229         ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
1230                              status1, /*bytes*/1);
1231         ahc_outb(ahc, CLRINT, CLRPARERR);
1232
1233         ahc_outb(ahc, SEQCTL, PERRORDIS);
1234         ahc_outb(ahc, SCBPTR, 0);
1235         ahc_outl(ahc, SCB_BASE, 0x5aa555aa);
1236         if (ahc_inl(ahc, SCB_BASE) != 0x5aa555aa)
1237                 goto fail;
1238
1239         status1 = ahc_pci_read_config(ahc->dev_softc,
1240                                       PCIR_STATUS + 1, /*bytes*/1);
1241         if ((status1 & STA) != 0)
1242                 goto fail;
1243
1244         error = 0;
1245
1246 fail:
1247         /* Silently clear any latched errors. */
1248         status1 = ahc_pci_read_config(ahc->dev_softc,
1249                                       PCIR_STATUS + 1, /*bytes*/1);
1250         ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
1251                              status1, /*bytes*/1);
1252         ahc_outb(ahc, CLRINT, CLRPARERR);
1253         ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
1254         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
1255         return (error);
1256 }
1257
1258 /*
1259  * Check the external port logic for a serial eeprom
1260  * and termination/cable detection contrls.
1261  */
1262 static void
1263 check_extport(struct ahc_softc *ahc, u_int *sxfrctl1)
1264 {
1265         struct  seeprom_descriptor sd;
1266         struct  seeprom_config *sc;
1267         int     have_seeprom;
1268         int     have_autoterm;
1269
1270         sd.sd_ahc = ahc;
1271         sd.sd_control_offset = SEECTL;          
1272         sd.sd_status_offset = SEECTL;           
1273         sd.sd_dataout_offset = SEECTL;          
1274         sc = ahc->seep_config;
1275
1276         /*
1277          * For some multi-channel devices, the c46 is simply too
1278          * small to work.  For the other controller types, we can
1279          * get our information from either SEEPROM type.  Set the
1280          * type to start our probe with accordingly.
1281          */
1282         if (ahc->flags & AHC_LARGE_SEEPROM)
1283                 sd.sd_chip = C56_66;
1284         else
1285                 sd.sd_chip = C46;
1286
1287         sd.sd_MS = SEEMS;
1288         sd.sd_RDY = SEERDY;
1289         sd.sd_CS = SEECS;
1290         sd.sd_CK = SEECK;
1291         sd.sd_DO = SEEDO;
1292         sd.sd_DI = SEEDI;
1293
1294         have_seeprom = ahc_acquire_seeprom(ahc, &sd);
1295         if (have_seeprom) {
1296
1297                 if (bootverbose) 
1298                         printf("%s: Reading SEEPROM...", ahc_name(ahc));
1299
1300                 for (;;) {
1301                         u_int start_addr;
1302
1303                         start_addr = 32 * (ahc->channel - 'A');
1304
1305                         have_seeprom = ahc_read_seeprom(&sd, (uint16_t *)sc,
1306                                                         start_addr,
1307                                                         sizeof(*sc)/2);
1308
1309                         if (have_seeprom)
1310                                 have_seeprom = ahc_verify_cksum(sc);
1311
1312                         if (have_seeprom != 0 || sd.sd_chip == C56_66) {
1313                                 if (bootverbose) {
1314                                         if (have_seeprom == 0)
1315                                                 printf ("checksum error\n");
1316                                         else
1317                                                 printf ("done.\n");
1318                                 }
1319                                 break;
1320                         }
1321                         sd.sd_chip = C56_66;
1322                 }
1323                 ahc_release_seeprom(&sd);
1324
1325                 /* Remember the SEEPROM type for later */
1326                 if (sd.sd_chip == C56_66)
1327                         ahc->flags |= AHC_LARGE_SEEPROM;
1328         }
1329
1330         if (!have_seeprom) {
1331                 /*
1332                  * Pull scratch ram settings and treat them as
1333                  * if they are the contents of an seeprom if
1334                  * the 'ADPT' signature is found in SCB2.
1335                  * We manually compose the data as 16bit values
1336                  * to avoid endian issues.
1337                  */
1338                 ahc_outb(ahc, SCBPTR, 2);
1339                 if (ahc_inb(ahc, SCB_BASE) == 'A'
1340                  && ahc_inb(ahc, SCB_BASE + 1) == 'D'
1341                  && ahc_inb(ahc, SCB_BASE + 2) == 'P'
1342                  && ahc_inb(ahc, SCB_BASE + 3) == 'T') {
1343                         uint16_t *sc_data;
1344                         int       i;
1345
1346                         sc_data = (uint16_t *)sc;
1347                         for (i = 0; i < 32; i++, sc_data++) {
1348                                 int     j;
1349
1350                                 j = i * 2;
1351                                 *sc_data = ahc_inb(ahc, SRAM_BASE + j)
1352                                          | ahc_inb(ahc, SRAM_BASE + j + 1) << 8;
1353                         }
1354                         have_seeprom = ahc_verify_cksum(sc);
1355                         if (have_seeprom)
1356                                 ahc->flags |= AHC_SCB_CONFIG_USED;
1357                 }
1358                 /*
1359                  * Clear any SCB parity errors in case this data and
1360                  * its associated parity was not initialized by the BIOS
1361                  */
1362                 ahc_outb(ahc, CLRINT, CLRPARERR);
1363                 ahc_outb(ahc, CLRINT, CLRBRKADRINT);
1364         }
1365
1366         if (!have_seeprom) {
1367                 if (bootverbose)
1368                         printf("%s: No SEEPROM available.\n", ahc_name(ahc));
1369                 ahc->flags |= AHC_USEDEFAULTS;
1370                 free(ahc->seep_config, M_DEVBUF);
1371                 ahc->seep_config = NULL;
1372                 sc = NULL;
1373         } else {
1374                 ahc_parse_pci_eeprom(ahc, sc);
1375         }
1376
1377         /*
1378          * Cards that have the external logic necessary to talk to
1379          * a SEEPROM, are almost certain to have the remaining logic
1380          * necessary for auto-termination control.  This assumption
1381          * hasn't failed yet...
1382          */
1383         have_autoterm = have_seeprom;
1384
1385         /*
1386          * Some low-cost chips have SEEPROM and auto-term control built
1387          * in, instead of using a GAL.  They can tell us directly
1388          * if the termination logic is enabled.
1389          */
1390         if ((ahc->features & AHC_SPIOCAP) != 0) {
1391                 if ((ahc_inb(ahc, SPIOCAP) & SSPIOCPS) == 0)
1392                         have_autoterm = FALSE;
1393         }
1394
1395         if (have_autoterm) {
1396                 ahc->flags |= AHC_HAS_TERM_LOGIC;
1397                 ahc_acquire_seeprom(ahc, &sd);
1398                 configure_termination(ahc, &sd, sc->adapter_control, sxfrctl1);
1399                 ahc_release_seeprom(&sd);
1400         } else if (have_seeprom) {
1401                 *sxfrctl1 &= ~STPWEN;
1402                 if ((sc->adapter_control & CFSTERM) != 0)
1403                         *sxfrctl1 |= STPWEN;
1404                 if (bootverbose)
1405                         printf("%s: Low byte termination %sabled\n",
1406                                ahc_name(ahc),
1407                                (*sxfrctl1 & STPWEN) ? "en" : "dis");
1408         }
1409 }
1410
1411 static void
1412 ahc_parse_pci_eeprom(struct ahc_softc *ahc, struct seeprom_config *sc)
1413 {
1414         /*
1415          * Put the data we've collected down into SRAM
1416          * where ahc_init will find it.
1417          */
1418         int      i;
1419         int      max_targ = sc->max_targets & CFMAXTARG;
1420         u_int    scsi_conf;
1421         uint16_t discenable;
1422         uint16_t ultraenb;
1423
1424         discenable = 0;
1425         ultraenb = 0;
1426         if ((sc->adapter_control & CFULTRAEN) != 0) {
1427                 /*
1428                  * Determine if this adapter has a "newstyle"
1429                  * SEEPROM format.
1430                  */
1431                 for (i = 0; i < max_targ; i++) {
1432                         if ((sc->device_flags[i] & CFSYNCHISULTRA) != 0) {
1433                                 ahc->flags |= AHC_NEWEEPROM_FMT;
1434                                 break;
1435                         }
1436                 }
1437         }
1438
1439         for (i = 0; i < max_targ; i++) {
1440                 u_int     scsirate;
1441                 uint16_t target_mask;
1442
1443                 target_mask = 0x01 << i;
1444                 if (sc->device_flags[i] & CFDISC)
1445                         discenable |= target_mask;
1446                 if ((ahc->flags & AHC_NEWEEPROM_FMT) != 0) {
1447                         if ((sc->device_flags[i] & CFSYNCHISULTRA) != 0)
1448                                 ultraenb |= target_mask;
1449                 } else if ((sc->adapter_control & CFULTRAEN) != 0) {
1450                         ultraenb |= target_mask;
1451                 }
1452                 if ((sc->device_flags[i] & CFXFER) == 0x04
1453                  && (ultraenb & target_mask) != 0) {
1454                         /* Treat 10MHz as a non-ultra speed */
1455                         sc->device_flags[i] &= ~CFXFER;
1456                         ultraenb &= ~target_mask;
1457                 }
1458                 if ((ahc->features & AHC_ULTRA2) != 0) {
1459                         u_int offset;
1460
1461                         if (sc->device_flags[i] & CFSYNCH)
1462                                 offset = MAX_OFFSET_ULTRA2;
1463                         else 
1464                                 offset = 0;
1465                         ahc_outb(ahc, TARG_OFFSET + i, offset);
1466
1467                         /*
1468                          * The ultra enable bits contain the
1469                          * high bit of the ultra2 sync rate
1470                          * field.
1471                          */
1472                         scsirate = (sc->device_flags[i] & CFXFER)
1473                                  | ((ultraenb & target_mask) ? 0x8 : 0x0);
1474                         if (sc->device_flags[i] & CFWIDEB)
1475                                 scsirate |= WIDEXFER;
1476                 } else {
1477                         scsirate = (sc->device_flags[i] & CFXFER) << 4;
1478                         if (sc->device_flags[i] & CFSYNCH)
1479                                 scsirate |= SOFS;
1480                         if (sc->device_flags[i] & CFWIDEB)
1481                                 scsirate |= WIDEXFER;
1482                 }
1483                 ahc_outb(ahc, TARG_SCSIRATE + i, scsirate);
1484         }
1485         ahc->our_id = sc->brtime_id & CFSCSIID;
1486
1487         scsi_conf = (ahc->our_id & 0x7);
1488         if (sc->adapter_control & CFSPARITY)
1489                 scsi_conf |= ENSPCHK;
1490         if (sc->adapter_control & CFRESETB)
1491                 scsi_conf |= RESET_SCSI;
1492
1493         ahc->flags |= (sc->adapter_control & CFBOOTCHAN) >> CFBOOTCHANSHIFT;
1494
1495         if (sc->bios_control & CFEXTEND)
1496                 ahc->flags |= AHC_EXTENDED_TRANS_A;
1497
1498         if (sc->bios_control & CFBIOSEN)
1499                 ahc->flags |= AHC_BIOS_ENABLED;
1500         if (ahc->features & AHC_ULTRA
1501          && (ahc->flags & AHC_NEWEEPROM_FMT) == 0) {
1502                 /* Should we enable Ultra mode? */
1503                 if (!(sc->adapter_control & CFULTRAEN))
1504                         /* Treat us as a non-ultra card */
1505                         ultraenb = 0;
1506         }
1507
1508         if (sc->signature == CFSIGNATURE
1509          || sc->signature == CFSIGNATURE2) {
1510                 uint32_t devconfig;
1511
1512                 /* Honor the STPWLEVEL settings */
1513                 devconfig = ahc_pci_read_config(ahc->dev_softc,
1514                                                 DEVCONFIG, /*bytes*/4);
1515                 devconfig &= ~STPWLEVEL;
1516                 if ((sc->bios_control & CFSTPWLEVEL) != 0)
1517                         devconfig |= STPWLEVEL;
1518                 ahc_pci_write_config(ahc->dev_softc, DEVCONFIG,
1519                                      devconfig, /*bytes*/4);
1520         }
1521         /* Set SCSICONF info */
1522         ahc_outb(ahc, SCSICONF, scsi_conf);
1523         ahc_outb(ahc, DISC_DSB, ~(discenable & 0xff));
1524         ahc_outb(ahc, DISC_DSB + 1, ~((discenable >> 8) & 0xff));
1525         ahc_outb(ahc, ULTRA_ENB, ultraenb & 0xff);
1526         ahc_outb(ahc, ULTRA_ENB + 1, (ultraenb >> 8) & 0xff);
1527 }
1528
1529 static void
1530 configure_termination(struct ahc_softc *ahc,
1531                       struct seeprom_descriptor *sd,
1532                       u_int adapter_control,
1533                       u_int *sxfrctl1)
1534 {
1535         uint8_t brddat;
1536         
1537         brddat = 0;
1538
1539         /*
1540          * Update the settings in sxfrctl1 to match the
1541          * termination settings 
1542          */
1543         *sxfrctl1 = 0;
1544         
1545         /*
1546          * SEECS must be on for the GALS to latch
1547          * the data properly.  Be sure to leave MS
1548          * on or we will release the seeprom.
1549          */
1550         SEEPROM_OUTB(sd, sd->sd_MS | sd->sd_CS);
1551         if ((adapter_control & CFAUTOTERM) != 0
1552          || (ahc->features & AHC_NEW_TERMCTL) != 0) {
1553                 int internal50_present;
1554                 int internal68_present;
1555                 int externalcable_present;
1556                 int eeprom_present;
1557                 int enableSEC_low;
1558                 int enableSEC_high;
1559                 int enablePRI_low;
1560                 int enablePRI_high;
1561                 int sum;
1562
1563                 enableSEC_low = 0;
1564                 enableSEC_high = 0;
1565                 enablePRI_low = 0;
1566                 enablePRI_high = 0;
1567                 if ((ahc->features & AHC_NEW_TERMCTL) != 0) {
1568                         ahc_new_term_detect(ahc, &enableSEC_low,
1569                                             &enableSEC_high,
1570                                             &enablePRI_low,
1571                                             &enablePRI_high,
1572                                             &eeprom_present);
1573                         if ((adapter_control & CFSEAUTOTERM) == 0) {
1574                                 if (bootverbose)
1575                                         printf("%s: Manual SE Termination\n",
1576                                                ahc_name(ahc));
1577                                 enableSEC_low = (adapter_control & CFSELOWTERM);
1578                                 enableSEC_high =
1579                                     (adapter_control & CFSEHIGHTERM);
1580                         }
1581                         if ((adapter_control & CFAUTOTERM) == 0) {
1582                                 if (bootverbose)
1583                                         printf("%s: Manual LVD Termination\n",
1584                                                ahc_name(ahc));
1585                                 enablePRI_low = (adapter_control & CFSTERM);
1586                                 enablePRI_high = (adapter_control & CFWSTERM);
1587                         }
1588                         /* Make the table calculations below happy */
1589                         internal50_present = 0;
1590                         internal68_present = 1;
1591                         externalcable_present = 1;
1592                 } else if ((ahc->features & AHC_SPIOCAP) != 0) {
1593                         aic785X_cable_detect(ahc, &internal50_present,
1594                                              &externalcable_present,
1595                                              &eeprom_present);
1596                         /* Can never support a wide connector. */
1597                         internal68_present = 0;
1598                 } else {
1599                         aic787X_cable_detect(ahc, &internal50_present,
1600                                              &internal68_present,
1601                                              &externalcable_present,
1602                                              &eeprom_present);
1603                 }
1604
1605                 if ((ahc->features & AHC_WIDE) == 0)
1606                         internal68_present = 0;
1607
1608                 if (bootverbose
1609                  && (ahc->features & AHC_ULTRA2) == 0) {
1610                         printf("%s: internal 50 cable %s present",
1611                                ahc_name(ahc),
1612                                internal50_present ? "is":"not");
1613
1614                         if ((ahc->features & AHC_WIDE) != 0)
1615                                 printf(", internal 68 cable %s present",
1616                                        internal68_present ? "is":"not");
1617                         printf("\n%s: external cable %s present\n",
1618                                ahc_name(ahc),
1619                                externalcable_present ? "is":"not");
1620                 }
1621                 if (bootverbose)
1622                         printf("%s: BIOS eeprom %s present\n",
1623                                ahc_name(ahc), eeprom_present ? "is" : "not");
1624
1625                 if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0) {
1626                         /*
1627                          * The 50 pin connector is a separate bus,
1628                          * so force it to always be terminated.
1629                          * In the future, perform current sensing
1630                          * to determine if we are in the middle of
1631                          * a properly terminated bus.
1632                          */
1633                         internal50_present = 0;
1634                 }
1635
1636                 /*
1637                  * Now set the termination based on what
1638                  * we found.
1639                  * Flash Enable = BRDDAT7
1640                  * Secondary High Term Enable = BRDDAT6
1641                  * Secondary Low Term Enable = BRDDAT5 (7890)
1642                  * Primary High Term Enable = BRDDAT4 (7890)
1643                  */
1644                 if ((ahc->features & AHC_ULTRA2) == 0
1645                  && (internal50_present != 0)
1646                  && (internal68_present != 0)
1647                  && (externalcable_present != 0)) {
1648                         printf("%s: Illegal cable configuration!!. "
1649                                "Only two connectors on the "
1650                                "adapter may be used at a "
1651                                "time!\n", ahc_name(ahc));
1652
1653                         /*
1654                          * Pretend there are no cables in the hope
1655                          * that having all of the termination on
1656                          * gives us a more stable bus.
1657                          */
1658                         internal50_present = 0;
1659                         internal68_present = 0;
1660                         externalcable_present = 0;
1661                 }
1662
1663                 if ((ahc->features & AHC_WIDE) != 0
1664                  && ((externalcable_present == 0)
1665                   || (internal68_present == 0)
1666                   || (enableSEC_high != 0))) {
1667                         brddat |= BRDDAT6;
1668                         if (bootverbose) {
1669                                 if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0)
1670                                         printf("%s: 68 pin termination "
1671                                                "Enabled\n", ahc_name(ahc));
1672                                 else
1673                                         printf("%s: %sHigh byte termination "
1674                                                "Enabled\n", ahc_name(ahc),
1675                                                enableSEC_high ? "Secondary "
1676                                                               : "");
1677                         }
1678                 }
1679
1680                 sum = internal50_present + internal68_present
1681                     + externalcable_present;
1682                 if (sum < 2 || (enableSEC_low != 0)) {
1683                         if ((ahc->features & AHC_ULTRA2) != 0)
1684                                 brddat |= BRDDAT5;
1685                         else
1686                                 *sxfrctl1 |= STPWEN;
1687                         if (bootverbose) {
1688                                 if ((ahc->flags & AHC_INT50_SPEEDFLEX) != 0)
1689                                         printf("%s: 50 pin termination "
1690                                                "Enabled\n", ahc_name(ahc));
1691                                 else
1692                                         printf("%s: %sLow byte termination "
1693                                                "Enabled\n", ahc_name(ahc),
1694                                                enableSEC_low ? "Secondary "
1695                                                              : "");
1696                         }
1697                 }
1698
1699                 if (enablePRI_low != 0) {
1700                         *sxfrctl1 |= STPWEN;
1701                         if (bootverbose)
1702                                 printf("%s: Primary Low Byte termination "
1703                                        "Enabled\n", ahc_name(ahc));
1704                 }
1705
1706                 /*
1707                  * Setup STPWEN before setting up the rest of
1708                  * the termination per the tech note on the U160 cards.
1709                  */
1710                 ahc_outb(ahc, SXFRCTL1, *sxfrctl1);
1711
1712                 if (enablePRI_high != 0) {
1713                         brddat |= BRDDAT4;
1714                         if (bootverbose)
1715                                 printf("%s: Primary High Byte "
1716                                        "termination Enabled\n",
1717                                        ahc_name(ahc));
1718                 }
1719                 
1720                 write_brdctl(ahc, brddat);
1721
1722         } else {
1723                 if ((adapter_control & CFSTERM) != 0) {
1724                         *sxfrctl1 |= STPWEN;
1725
1726                         if (bootverbose)
1727                                 printf("%s: %sLow byte termination Enabled\n",
1728                                        ahc_name(ahc),
1729                                        (ahc->features & AHC_ULTRA2) ? "Primary "
1730                                                                     : "");
1731                 }
1732
1733                 if ((adapter_control & CFWSTERM) != 0
1734                  && (ahc->features & AHC_WIDE) != 0) {
1735                         brddat |= BRDDAT6;
1736                         if (bootverbose)
1737                                 printf("%s: %sHigh byte termination Enabled\n",
1738                                        ahc_name(ahc),
1739                                        (ahc->features & AHC_ULTRA2)
1740                                      ? "Secondary " : "");
1741                 }
1742
1743                 /*
1744                  * Setup STPWEN before setting up the rest of
1745                  * the termination per the tech note on the U160 cards.
1746                  */
1747                 ahc_outb(ahc, SXFRCTL1, *sxfrctl1);
1748
1749                 if ((ahc->features & AHC_WIDE) != 0)
1750                         write_brdctl(ahc, brddat);
1751         }
1752         SEEPROM_OUTB(sd, sd->sd_MS); /* Clear CS */
1753 }
1754
1755 static void
1756 ahc_new_term_detect(struct ahc_softc *ahc, int *enableSEC_low,
1757                     int *enableSEC_high, int *enablePRI_low,
1758                     int *enablePRI_high, int *eeprom_present)
1759 {
1760         uint8_t brdctl;
1761
1762         /*
1763          * BRDDAT7 = Eeprom
1764          * BRDDAT6 = Enable Secondary High Byte termination
1765          * BRDDAT5 = Enable Secondary Low Byte termination
1766          * BRDDAT4 = Enable Primary high byte termination
1767          * BRDDAT3 = Enable Primary low byte termination
1768          */
1769         brdctl = read_brdctl(ahc);
1770         *eeprom_present = brdctl & BRDDAT7;
1771         *enableSEC_high = (brdctl & BRDDAT6);
1772         *enableSEC_low = (brdctl & BRDDAT5);
1773         *enablePRI_high = (brdctl & BRDDAT4);
1774         *enablePRI_low = (brdctl & BRDDAT3);
1775 }
1776
1777 static void
1778 aic787X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
1779                      int *internal68_present, int *externalcable_present,
1780                      int *eeprom_present)
1781 {
1782         uint8_t brdctl;
1783
1784         /*
1785          * First read the status of our cables.
1786          * Set the rom bank to 0 since the
1787          * bank setting serves as a multiplexor
1788          * for the cable detection logic.
1789          * BRDDAT5 controls the bank switch.
1790          */
1791         write_brdctl(ahc, 0);
1792
1793         /*
1794          * Now read the state of the internal
1795          * connectors.  BRDDAT6 is INT50 and
1796          * BRDDAT7 is INT68.
1797          */
1798         brdctl = read_brdctl(ahc);
1799         *internal50_present = (brdctl & BRDDAT6) ? 0 : 1;
1800         *internal68_present = (brdctl & BRDDAT7) ? 0 : 1;
1801
1802         /*
1803          * Set the rom bank to 1 and determine
1804          * the other signals.
1805          */
1806         write_brdctl(ahc, BRDDAT5);
1807
1808         /*
1809          * Now read the state of the external
1810          * connectors.  BRDDAT6 is EXT68 and
1811          * BRDDAT7 is EPROMPS.
1812          */
1813         brdctl = read_brdctl(ahc);
1814         *externalcable_present = (brdctl & BRDDAT6) ? 0 : 1;
1815         *eeprom_present = (brdctl & BRDDAT7) ? 1 : 0;
1816 }
1817
1818 static void
1819 aic785X_cable_detect(struct ahc_softc *ahc, int *internal50_present,
1820                      int *externalcable_present, int *eeprom_present)
1821 {
1822         uint8_t brdctl;
1823         uint8_t spiocap;
1824
1825         spiocap = ahc_inb(ahc, SPIOCAP);
1826         spiocap &= ~SOFTCMDEN;
1827         spiocap |= EXT_BRDCTL;
1828         ahc_outb(ahc, SPIOCAP, spiocap);
1829         ahc_outb(ahc, BRDCTL, BRDRW|BRDCS);
1830         ahc_flush_device_writes(ahc);
1831         ahc_delay(500);
1832         ahc_outb(ahc, BRDCTL, 0);
1833         ahc_flush_device_writes(ahc);
1834         ahc_delay(500);
1835         brdctl = ahc_inb(ahc, BRDCTL);
1836         *internal50_present = (brdctl & BRDDAT5) ? 0 : 1;
1837         *externalcable_present = (brdctl & BRDDAT6) ? 0 : 1;
1838         *eeprom_present = (ahc_inb(ahc, SPIOCAP) & EEPROM) ? 1 : 0;
1839 }
1840         
1841 int
1842 ahc_acquire_seeprom(struct ahc_softc *ahc, struct seeprom_descriptor *sd)
1843 {
1844         int wait;
1845
1846         if ((ahc->features & AHC_SPIOCAP) != 0
1847          && (ahc_inb(ahc, SPIOCAP) & SEEPROM) == 0)
1848                 return (0);
1849
1850         /*
1851          * Request access of the memory port.  When access is
1852          * granted, SEERDY will go high.  We use a 1 second
1853          * timeout which should be near 1 second more than
1854          * is needed.  Reason: after the chip reset, there
1855          * should be no contention.
1856          */
1857         SEEPROM_OUTB(sd, sd->sd_MS);
1858         wait = 1000;  /* 1 second timeout in msec */
1859         while (--wait && ((SEEPROM_STATUS_INB(sd) & sd->sd_RDY) == 0)) {
1860                 ahc_delay(1000);  /* delay 1 msec */
1861         }
1862         if ((SEEPROM_STATUS_INB(sd) & sd->sd_RDY) == 0) {
1863                 SEEPROM_OUTB(sd, 0); 
1864                 return (0);
1865         }
1866         return(1);
1867 }
1868
1869 void
1870 ahc_release_seeprom(struct seeprom_descriptor *sd)
1871 {
1872         /* Release access to the memory port and the serial EEPROM. */
1873         SEEPROM_OUTB(sd, 0);
1874 }
1875
1876 static void
1877 write_brdctl(struct ahc_softc *ahc, uint8_t value)
1878 {
1879         uint8_t brdctl;
1880
1881         if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7895) {
1882                 brdctl = BRDSTB;
1883                 if (ahc->channel == 'B')
1884                         brdctl |= BRDCS;
1885         } else if ((ahc->features & AHC_ULTRA2) != 0) {
1886                 brdctl = 0;
1887         } else {
1888                 brdctl = BRDSTB|BRDCS;
1889         }
1890         ahc_outb(ahc, BRDCTL, brdctl);
1891         ahc_flush_device_writes(ahc);
1892         brdctl |= value;
1893         ahc_outb(ahc, BRDCTL, brdctl);
1894         ahc_flush_device_writes(ahc);
1895         if ((ahc->features & AHC_ULTRA2) != 0)
1896                 brdctl |= BRDSTB_ULTRA2;
1897         else
1898                 brdctl &= ~BRDSTB;
1899         ahc_outb(ahc, BRDCTL, brdctl);
1900         ahc_flush_device_writes(ahc);
1901         if ((ahc->features & AHC_ULTRA2) != 0)
1902                 brdctl = 0;
1903         else
1904                 brdctl &= ~BRDCS;
1905         ahc_outb(ahc, BRDCTL, brdctl);
1906 }
1907
1908 static uint8_t
1909 read_brdctl(struct ahc_softc *ahc)
1910 {
1911         uint8_t brdctl;
1912         uint8_t value;
1913
1914         if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7895) {
1915                 brdctl = BRDRW;
1916                 if (ahc->channel == 'B')
1917                         brdctl |= BRDCS;
1918         } else if ((ahc->features & AHC_ULTRA2) != 0) {
1919                 brdctl = BRDRW_ULTRA2;
1920         } else {
1921                 brdctl = BRDRW|BRDCS;
1922         }
1923         ahc_outb(ahc, BRDCTL, brdctl);
1924         ahc_flush_device_writes(ahc);
1925         value = ahc_inb(ahc, BRDCTL);
1926         ahc_outb(ahc, BRDCTL, 0);
1927         return (value);
1928 }
1929
1930 static void
1931 ahc_pci_intr(struct ahc_softc *ahc)
1932 {
1933         u_int error;
1934         u_int status1;
1935
1936         error = ahc_inb(ahc, ERROR);
1937         if ((error & PCIERRSTAT) == 0)
1938                 return;
1939
1940         status1 = ahc_pci_read_config(ahc->dev_softc,
1941                                       PCIR_STATUS + 1, /*bytes*/1);
1942
1943         printf("%s: PCI error Interrupt at seqaddr = 0x%x\n",
1944               ahc_name(ahc),
1945               ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
1946
1947         if (status1 & DPE) {
1948                 ahc->pci_target_perr_count++;
1949                 printf("%s: Data Parity Error Detected during address "
1950                        "or write data phase\n", ahc_name(ahc));
1951         }
1952         if (status1 & SSE) {
1953                 printf("%s: Signal System Error Detected\n", ahc_name(ahc));
1954         }
1955         if (status1 & RMA) {
1956                 printf("%s: Received a Master Abort\n", ahc_name(ahc));
1957         }
1958         if (status1 & RTA) {
1959                 printf("%s: Received a Target Abort\n", ahc_name(ahc));
1960         }
1961         if (status1 & STA) {
1962                 printf("%s: Signaled a Target Abort\n", ahc_name(ahc));
1963         }
1964         if (status1 & DPR) {
1965                 printf("%s: Data Parity Error has been reported via PERR#\n",
1966                        ahc_name(ahc));
1967         }
1968
1969         /* Clear latched errors. */
1970         ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
1971                              status1, /*bytes*/1);
1972
1973         if ((status1 & (DPE|SSE|RMA|RTA|STA|DPR)) == 0) {
1974                 printf("%s: Latched PCIERR interrupt with "
1975                        "no status bits set\n", ahc_name(ahc)); 
1976         } else {
1977                 ahc_outb(ahc, CLRINT, CLRPARERR);
1978         }
1979
1980         if (ahc->pci_target_perr_count > AHC_PCI_TARGET_PERR_THRESH) {
1981                 printf(
1982 "%s: WARNING WARNING WARNING WARNING\n"
1983 "%s: Too many PCI parity errors observed as a target.\n"
1984 "%s: Some device on this bus is generating bad parity.\n"
1985 "%s: This is an error *observed by*, not *generated by*, this controller.\n"
1986 "%s: PCI parity error checking has been disabled.\n"
1987 "%s: WARNING WARNING WARNING WARNING\n",
1988                        ahc_name(ahc), ahc_name(ahc), ahc_name(ahc),
1989                        ahc_name(ahc), ahc_name(ahc), ahc_name(ahc));
1990                 ahc->seqctl |= FAILDIS;
1991                 ahc_outb(ahc, SEQCTL, ahc->seqctl);
1992         }
1993         ahc_unpause(ahc);
1994 }
1995
1996 static int
1997 ahc_pci_chip_init(struct ahc_softc *ahc)
1998 {
1999         ahc_outb(ahc, DSCOMMAND0, ahc->bus_softc.pci_softc.dscommand0);
2000         ahc_outb(ahc, DSPCISTATUS, ahc->bus_softc.pci_softc.dspcistatus);
2001         if ((ahc->features & AHC_DT) != 0) {
2002                 u_int sfunct;
2003
2004                 sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
2005                 ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
2006                 ahc_outb(ahc, OPTIONMODE, ahc->bus_softc.pci_softc.optionmode);
2007                 ahc_outw(ahc, TARGCRCCNT, ahc->bus_softc.pci_softc.targcrccnt);
2008                 ahc_outb(ahc, SFUNCT, sfunct);
2009                 ahc_outb(ahc, CRCCONTROL1,
2010                          ahc->bus_softc.pci_softc.crccontrol1);
2011         }
2012         if ((ahc->features & AHC_MULTI_FUNC) != 0)
2013                 ahc_outb(ahc, SCBBADDR, ahc->bus_softc.pci_softc.scbbaddr);
2014
2015         if ((ahc->features & AHC_ULTRA2) != 0)
2016                 ahc_outb(ahc, DFF_THRSH, ahc->bus_softc.pci_softc.dff_thrsh);
2017
2018         return (ahc_chip_init(ahc));
2019 }
2020
2021 static int
2022 ahc_pci_suspend(struct ahc_softc *ahc)
2023 {
2024         return (ahc_suspend(ahc));
2025 }
2026
2027 static int
2028 ahc_pci_resume(struct ahc_softc *ahc)
2029 {
2030
2031         pci_set_power_state(ahc->dev_softc, AHC_POWER_STATE_D0);
2032
2033         /*
2034          * We assume that the OS has restored our register
2035          * mappings, etc.  Just update the config space registers
2036          * that the OS doesn't know about and rely on our chip
2037          * reset handler to handle the rest.
2038          */
2039         ahc_pci_write_config(ahc->dev_softc, DEVCONFIG, /*bytes*/4,
2040                              ahc->bus_softc.pci_softc.devconfig);
2041         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1,
2042                              ahc->bus_softc.pci_softc.command);
2043         ahc_pci_write_config(ahc->dev_softc, CSIZE_LATTIME, /*bytes*/1,
2044                              ahc->bus_softc.pci_softc.csize_lattime);
2045         if ((ahc->flags & AHC_HAS_TERM_LOGIC) != 0) {
2046                 struct  seeprom_descriptor sd;
2047                 u_int   sxfrctl1;
2048
2049                 sd.sd_ahc = ahc;
2050                 sd.sd_control_offset = SEECTL;          
2051                 sd.sd_status_offset = SEECTL;           
2052                 sd.sd_dataout_offset = SEECTL;          
2053
2054                 ahc_acquire_seeprom(ahc, &sd);
2055                 configure_termination(ahc, &sd,
2056                                       ahc->seep_config->adapter_control,
2057                                       &sxfrctl1);
2058                 ahc_release_seeprom(&sd);
2059         }
2060         return (ahc_resume(ahc));
2061 }
2062
2063 static int
2064 ahc_aic785X_setup(struct ahc_softc *ahc)
2065 {
2066         ahc_dev_softc_t pci;
2067         uint8_t rev;
2068
2069         pci = ahc->dev_softc;
2070         ahc->channel = 'A';
2071         ahc->chip = AHC_AIC7850;
2072         ahc->features = AHC_AIC7850_FE;
2073         ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
2074         rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
2075         if (rev >= 1)
2076                 ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
2077         ahc->instruction_ram_size = 512;
2078         return (0);
2079 }
2080
2081 static int
2082 ahc_aic7860_setup(struct ahc_softc *ahc)
2083 {
2084         ahc_dev_softc_t pci;
2085         uint8_t rev;
2086
2087         pci = ahc->dev_softc;
2088         ahc->channel = 'A';
2089         ahc->chip = AHC_AIC7860;
2090         ahc->features = AHC_AIC7860_FE;
2091         ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
2092         rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
2093         if (rev >= 1)
2094                 ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
2095         ahc->instruction_ram_size = 512;
2096         return (0);
2097 }
2098
2099 static int
2100 ahc_apa1480_setup(struct ahc_softc *ahc)
2101 {
2102         int error;
2103
2104         error = ahc_aic7860_setup(ahc);
2105         if (error != 0)
2106                 return (error);
2107         ahc->features |= AHC_REMOVABLE;
2108         return (0);
2109 }
2110
2111 static int
2112 ahc_aic7870_setup(struct ahc_softc *ahc)
2113 {
2114
2115         ahc->channel = 'A';
2116         ahc->chip = AHC_AIC7870;
2117         ahc->features = AHC_AIC7870_FE;
2118         ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
2119         ahc->instruction_ram_size = 512;
2120         return (0);
2121 }
2122
2123 static int
2124 ahc_aha394X_setup(struct ahc_softc *ahc)
2125 {
2126         int error;
2127
2128         error = ahc_aic7870_setup(ahc);
2129         if (error == 0)
2130                 error = ahc_aha394XX_setup(ahc);
2131         return (error);
2132 }
2133
2134 static int
2135 ahc_aha398X_setup(struct ahc_softc *ahc)
2136 {
2137         int error;
2138
2139         error = ahc_aic7870_setup(ahc);
2140         if (error == 0)
2141                 error = ahc_aha398XX_setup(ahc);
2142         return (error);
2143 }
2144
2145 static int
2146 ahc_aha494X_setup(struct ahc_softc *ahc)
2147 {
2148         int error;
2149
2150         error = ahc_aic7870_setup(ahc);
2151         if (error == 0)
2152                 error = ahc_aha494XX_setup(ahc);
2153         return (error);
2154 }
2155
2156 static int
2157 ahc_aic7880_setup(struct ahc_softc *ahc)
2158 {
2159         ahc_dev_softc_t pci;
2160         uint8_t rev;
2161
2162         pci = ahc->dev_softc;
2163         ahc->channel = 'A';
2164         ahc->chip = AHC_AIC7880;
2165         ahc->features = AHC_AIC7880_FE;
2166         ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
2167         rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
2168         if (rev >= 1) {
2169                 ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
2170         } else {
2171                 ahc->bugs |= AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
2172         }
2173         ahc->instruction_ram_size = 512;
2174         return (0);
2175 }
2176
2177 static int
2178 ahc_aha2940Pro_setup(struct ahc_softc *ahc)
2179 {
2180
2181         ahc->flags |= AHC_INT50_SPEEDFLEX;
2182         return (ahc_aic7880_setup(ahc));
2183 }
2184
2185 static int
2186 ahc_aha394XU_setup(struct ahc_softc *ahc)
2187 {
2188         int error;
2189
2190         error = ahc_aic7880_setup(ahc);
2191         if (error == 0)
2192                 error = ahc_aha394XX_setup(ahc);
2193         return (error);
2194 }
2195
2196 static int
2197 ahc_aha398XU_setup(struct ahc_softc *ahc)
2198 {
2199         int error;
2200
2201         error = ahc_aic7880_setup(ahc);
2202         if (error == 0)
2203                 error = ahc_aha398XX_setup(ahc);
2204         return (error);
2205 }
2206
2207 static int
2208 ahc_aic7890_setup(struct ahc_softc *ahc)
2209 {
2210         ahc_dev_softc_t pci;
2211         uint8_t rev;
2212
2213         pci = ahc->dev_softc;
2214         ahc->channel = 'A';
2215         ahc->chip = AHC_AIC7890;
2216         ahc->features = AHC_AIC7890_FE;
2217         ahc->flags |= AHC_NEWEEPROM_FMT;
2218         rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
2219         if (rev == 0)
2220                 ahc->bugs |= AHC_AUTOFLUSH_BUG|AHC_CACHETHEN_BUG;
2221         ahc->instruction_ram_size = 768;
2222         return (0);
2223 }
2224
2225 static int
2226 ahc_aic7892_setup(struct ahc_softc *ahc)
2227 {
2228
2229         ahc->channel = 'A';
2230         ahc->chip = AHC_AIC7892;
2231         ahc->features = AHC_AIC7892_FE;
2232         ahc->flags |= AHC_NEWEEPROM_FMT;
2233         ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
2234         ahc->instruction_ram_size = 1024;
2235         return (0);
2236 }
2237
2238 static int
2239 ahc_aic7895_setup(struct ahc_softc *ahc)
2240 {
2241         ahc_dev_softc_t pci;
2242         uint8_t rev;
2243
2244         pci = ahc->dev_softc;
2245         ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
2246         /*
2247          * The 'C' revision of the aic7895 has a few additional features.
2248          */
2249         rev = ahc_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
2250         if (rev >= 4) {
2251                 ahc->chip = AHC_AIC7895C;
2252                 ahc->features = AHC_AIC7895C_FE;
2253         } else  {
2254                 u_int command;
2255
2256                 ahc->chip = AHC_AIC7895;
2257                 ahc->features = AHC_AIC7895_FE;
2258
2259                 /*
2260                  * The BIOS disables the use of MWI transactions
2261                  * since it does not have the MWI bug work around
2262                  * we have.  Disabling MWI reduces performance, so
2263                  * turn it on again.
2264                  */
2265                 command = ahc_pci_read_config(pci, PCIR_COMMAND, /*bytes*/1);
2266                 command |= PCIM_CMD_MWRICEN;
2267                 ahc_pci_write_config(pci, PCIR_COMMAND, command, /*bytes*/1);
2268                 ahc->bugs |= AHC_PCI_MWI_BUG;
2269         }
2270         /*
2271          * XXX Does CACHETHEN really not work???  What about PCI retry?
2272          * on C level chips.  Need to test, but for now, play it safe.
2273          */
2274         ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_PCI_2_1_RETRY_BUG
2275                   |  AHC_CACHETHEN_BUG;
2276
2277 #if 0
2278         uint32_t devconfig;
2279
2280         /*
2281          * Cachesize must also be zero due to stray DAC
2282          * problem when sitting behind some bridges.
2283          */
2284         ahc_pci_write_config(pci, CSIZE_LATTIME, 0, /*bytes*/1);
2285         devconfig = ahc_pci_read_config(pci, DEVCONFIG, /*bytes*/1);
2286         devconfig |= MRDCEN;
2287         ahc_pci_write_config(pci, DEVCONFIG, devconfig, /*bytes*/1);
2288 #endif
2289         ahc->flags |= AHC_NEWEEPROM_FMT;
2290         ahc->instruction_ram_size = 512;
2291         return (0);
2292 }
2293
2294 static int
2295 ahc_aic7896_setup(struct ahc_softc *ahc)
2296 {
2297         ahc_dev_softc_t pci;
2298
2299         pci = ahc->dev_softc;
2300         ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
2301         ahc->chip = AHC_AIC7896;
2302         ahc->features = AHC_AIC7896_FE;
2303         ahc->flags |= AHC_NEWEEPROM_FMT;
2304         ahc->bugs |= AHC_CACHETHEN_DIS_BUG;
2305         ahc->instruction_ram_size = 768;
2306         return (0);
2307 }
2308
2309 static int
2310 ahc_aic7899_setup(struct ahc_softc *ahc)
2311 {
2312         ahc_dev_softc_t pci;
2313
2314         pci = ahc->dev_softc;
2315         ahc->channel = ahc_get_pci_function(pci) == 1 ? 'B' : 'A';
2316         ahc->chip = AHC_AIC7899;
2317         ahc->features = AHC_AIC7899_FE;
2318         ahc->flags |= AHC_NEWEEPROM_FMT;
2319         ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
2320         ahc->instruction_ram_size = 1024;
2321         return (0);
2322 }
2323
2324 static int
2325 ahc_aha29160C_setup(struct ahc_softc *ahc)
2326 {
2327         int error;
2328
2329         error = ahc_aic7899_setup(ahc);
2330         if (error != 0)
2331                 return (error);
2332         ahc->features |= AHC_REMOVABLE;
2333         return (0);
2334 }
2335
2336 static int
2337 ahc_raid_setup(struct ahc_softc *ahc)
2338 {
2339         printf("RAID functionality unsupported\n");
2340         return (ENXIO);
2341 }
2342
2343 static int
2344 ahc_aha394XX_setup(struct ahc_softc *ahc)
2345 {
2346         ahc_dev_softc_t pci;
2347
2348         pci = ahc->dev_softc;
2349         switch (ahc_get_pci_slot(pci)) {
2350         case AHC_394X_SLOT_CHANNEL_A:
2351                 ahc->channel = 'A';
2352                 break;
2353         case AHC_394X_SLOT_CHANNEL_B:
2354                 ahc->channel = 'B';
2355                 break;
2356         default:
2357                 printf("adapter at unexpected slot %d\n"
2358                        "unable to map to a channel\n",
2359                        ahc_get_pci_slot(pci));
2360                 ahc->channel = 'A';
2361         }
2362         return (0);
2363 }
2364
2365 static int
2366 ahc_aha398XX_setup(struct ahc_softc *ahc)
2367 {
2368         ahc_dev_softc_t pci;
2369
2370         pci = ahc->dev_softc;
2371         switch (ahc_get_pci_slot(pci)) {
2372         case AHC_398X_SLOT_CHANNEL_A:
2373                 ahc->channel = 'A';
2374                 break;
2375         case AHC_398X_SLOT_CHANNEL_B:
2376                 ahc->channel = 'B';
2377                 break;
2378         case AHC_398X_SLOT_CHANNEL_C:
2379                 ahc->channel = 'C';
2380                 break;
2381         default:
2382                 printf("adapter at unexpected slot %d\n"
2383                        "unable to map to a channel\n",
2384                        ahc_get_pci_slot(pci));
2385                 ahc->channel = 'A';
2386                 break;
2387         }
2388         ahc->flags |= AHC_LARGE_SEEPROM;
2389         return (0);
2390 }
2391
2392 static int
2393 ahc_aha494XX_setup(struct ahc_softc *ahc)
2394 {
2395         ahc_dev_softc_t pci;
2396
2397         pci = ahc->dev_softc;
2398         switch (ahc_get_pci_slot(pci)) {
2399         case AHC_494X_SLOT_CHANNEL_A:
2400                 ahc->channel = 'A';
2401                 break;
2402         case AHC_494X_SLOT_CHANNEL_B:
2403                 ahc->channel = 'B';
2404                 break;
2405         case AHC_494X_SLOT_CHANNEL_C:
2406                 ahc->channel = 'C';
2407                 break;
2408         case AHC_494X_SLOT_CHANNEL_D:
2409                 ahc->channel = 'D';
2410                 break;
2411         default:
2412                 printf("adapter at unexpected slot %d\n"
2413                        "unable to map to a channel\n",
2414                        ahc_get_pci_slot(pci));
2415                 ahc->channel = 'A';
2416         }
2417         ahc->flags |= AHC_LARGE_SEEPROM;
2418         return (0);
2419 }