Merge /pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / drivers / scsi / aic7xxx / aic79xx_pci.c
1 /*
2  * Product specific probe and attach routines for:
3  *      aic7901 and aic7902 SCSI controllers
4  *
5  * Copyright (c) 1994-2001 Justin T. Gibbs.
6  * Copyright (c) 2000-2002 Adaptec Inc.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions, and the following disclaimer,
14  *    without modification.
15  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
16  *    substantially similar to the "NO WARRANTY" disclaimer below
17  *    ("Disclaimer") and any redistribution must be conditioned upon
18  *    including a substantially similar Disclaimer requirement for further
19  *    binary redistribution.
20  * 3. Neither the names of the above-listed copyright holders nor the names
21  *    of any contributors may be used to endorse or promote products derived
22  *    from this software without specific prior written permission.
23  *
24  * Alternatively, this software may be distributed under the terms of the
25  * GNU General Public License ("GPL") version 2 as published by the Free
26  * Software Foundation.
27  *
28  * NO WARRANTY
29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
32  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
38  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
39  * POSSIBILITY OF SUCH DAMAGES.
40  *
41  * $Id: //depot/aic7xxx/aic7xxx/aic79xx_pci.c#77 $
42  *
43  * $FreeBSD$
44  */
45
46 #ifdef __linux__
47 #include "aic79xx_osm.h"
48 #include "aic79xx_inline.h"
49 #else
50 #include <dev/aic7xxx/aic79xx_osm.h>
51 #include <dev/aic7xxx/aic79xx_inline.h>
52 #endif
53
54 #include "aic79xx_pci.h"
55
56 static __inline uint64_t
57 ahd_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
58 {
59         uint64_t id;
60
61         id = subvendor
62            | (subdevice << 16)
63            | ((uint64_t)vendor << 32)
64            | ((uint64_t)device << 48);
65
66         return (id);
67 }
68
69 #define ID_AIC7902_PCI_REV_A4           0x3
70 #define ID_AIC7902_PCI_REV_B0           0x10
71 #define SUBID_HP                        0x0E11
72
73 #define DEVID_9005_HOSTRAID(id) ((id) & 0x80)
74
75 #define DEVID_9005_TYPE(id) ((id) & 0xF)
76 #define         DEVID_9005_TYPE_HBA             0x0     /* Standard Card */
77 #define         DEVID_9005_TYPE_HBA_2EXT        0x1     /* 2 External Ports */
78 #define         DEVID_9005_TYPE_IROC            0x8     /* Raid(0,1,10) Card */
79 #define         DEVID_9005_TYPE_MB              0xF     /* On Motherboard */
80
81 #define DEVID_9005_MFUNC(id) ((id) & 0x10)
82
83 #define DEVID_9005_PACKETIZED(id) ((id) & 0x8000)
84
85 #define SUBID_9005_TYPE(id) ((id) & 0xF)
86 #define         SUBID_9005_TYPE_HBA             0x0     /* Standard Card */
87 #define         SUBID_9005_TYPE_MB              0xF     /* On Motherboard */
88
89 #define SUBID_9005_AUTOTERM(id) (((id) & 0x10) == 0)
90
91 #define SUBID_9005_LEGACYCONN_FUNC(id) ((id) & 0x20)
92
93 #define SUBID_9005_SEEPTYPE(id) ((id) & 0x0C0) >> 6)
94 #define         SUBID_9005_SEEPTYPE_NONE        0x0
95 #define         SUBID_9005_SEEPTYPE_4K          0x1
96
97 static ahd_device_setup_t ahd_aic7901_setup;
98 static ahd_device_setup_t ahd_aic7901A_setup;
99 static ahd_device_setup_t ahd_aic7902_setup;
100 static ahd_device_setup_t ahd_aic790X_setup;
101
102 struct ahd_pci_identity ahd_pci_ident_table [] =
103 {
104         /* aic7901 based controllers */
105         {
106                 ID_AHA_29320A,
107                 ID_ALL_MASK,
108                 "Adaptec 29320A Ultra320 SCSI adapter",
109                 ahd_aic7901_setup
110         },
111         {
112                 ID_AHA_29320ALP,
113                 ID_ALL_MASK,
114                 "Adaptec 29320ALP Ultra320 SCSI adapter",
115                 ahd_aic7901_setup
116         },
117         /* aic7902 based controllers */ 
118         {
119                 ID_AHA_29320,
120                 ID_ALL_MASK,
121                 "Adaptec 29320 Ultra320 SCSI adapter",
122                 ahd_aic7902_setup
123         },
124         {
125                 ID_AHA_29320B,
126                 ID_ALL_MASK,
127                 "Adaptec 29320B Ultra320 SCSI adapter",
128                 ahd_aic7902_setup
129         },
130         {
131                 ID_AHA_29320LP,
132                 ID_ALL_MASK,
133                 "Adaptec 29320LP Ultra320 SCSI adapter",
134                 ahd_aic7901A_setup
135         },
136         {
137                 ID_AHA_39320,
138                 ID_ALL_MASK,
139                 "Adaptec 39320 Ultra320 SCSI adapter",
140                 ahd_aic7902_setup
141         },
142         {
143                 ID_AHA_39320_B,
144                 ID_ALL_MASK,
145                 "Adaptec 39320 Ultra320 SCSI adapter",
146                 ahd_aic7902_setup
147         },
148         {
149                 ID_AHA_39320A,
150                 ID_ALL_MASK,
151                 "Adaptec 39320A Ultra320 SCSI adapter",
152                 ahd_aic7902_setup
153         },
154         {
155                 ID_AHA_39320D,
156                 ID_ALL_MASK,
157                 "Adaptec 39320D Ultra320 SCSI adapter",
158                 ahd_aic7902_setup
159         },
160         {
161                 ID_AHA_39320D_HP,
162                 ID_ALL_MASK,
163                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
164                 ahd_aic7902_setup
165         },
166         {
167                 ID_AHA_39320D_B,
168                 ID_ALL_MASK,
169                 "Adaptec 39320D Ultra320 SCSI adapter",
170                 ahd_aic7902_setup
171         },
172         {
173                 ID_AHA_39320D_B_HP,
174                 ID_ALL_MASK,
175                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
176                 ahd_aic7902_setup
177         },
178         /* Generic chip probes for devices we don't know 'exactly' */
179         {
180                 ID_AIC7901 & ID_9005_GENERIC_MASK,
181                 ID_9005_GENERIC_MASK,
182                 "Adaptec AIC7901 Ultra320 SCSI adapter",
183                 ahd_aic7901_setup
184         },
185         {
186                 ID_AIC7901A & ID_DEV_VENDOR_MASK,
187                 ID_DEV_VENDOR_MASK,
188                 "Adaptec AIC7901A Ultra320 SCSI adapter",
189                 ahd_aic7901A_setup
190         },
191         {
192                 ID_AIC7902 & ID_9005_GENERIC_MASK,
193                 ID_9005_GENERIC_MASK,
194                 "Adaptec AIC7902 Ultra320 SCSI adapter",
195                 ahd_aic7902_setup
196         }
197 };
198
199 const u_int ahd_num_pci_devs = NUM_ELEMENTS(ahd_pci_ident_table);
200                 
201 #define DEVCONFIG               0x40
202 #define         PCIXINITPAT     0x0000E000ul
203 #define                 PCIXINIT_PCI33_66       0x0000E000ul
204 #define                 PCIXINIT_PCIX50_66      0x0000C000ul
205 #define                 PCIXINIT_PCIX66_100     0x0000A000ul
206 #define                 PCIXINIT_PCIX100_133    0x00008000ul
207 #define PCI_BUS_MODES_INDEX(devconfig)  \
208         (((devconfig) & PCIXINITPAT) >> 13)
209 static const char *pci_bus_modes[] =
210 {
211         "PCI bus mode unknown",
212         "PCI bus mode unknown",
213         "PCI bus mode unknown",
214         "PCI bus mode unknown",
215         "PCI-X 101-133Mhz",
216         "PCI-X 67-100Mhz",
217         "PCI-X 50-66Mhz",
218         "PCI 33 or 66Mhz"
219 };
220
221 #define         TESTMODE        0x00000800ul
222 #define         IRDY_RST        0x00000200ul
223 #define         FRAME_RST       0x00000100ul
224 #define         PCI64BIT        0x00000080ul
225 #define         MRDCEN          0x00000040ul
226 #define         ENDIANSEL       0x00000020ul
227 #define         MIXQWENDIANEN   0x00000008ul
228 #define         DACEN           0x00000004ul
229 #define         STPWLEVEL       0x00000002ul
230 #define         QWENDIANSEL     0x00000001ul
231
232 #define DEVCONFIG1              0x44
233 #define         PREQDIS         0x01
234
235 #define CSIZE_LATTIME           0x0c
236 #define         CACHESIZE       0x000000fful
237 #define         LATTIME         0x0000ff00ul
238
239 static int      ahd_check_extport(struct ahd_softc *ahd);
240 static void     ahd_configure_termination(struct ahd_softc *ahd,
241                                           u_int adapter_control);
242 static void     ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat);
243
244 struct ahd_pci_identity *
245 ahd_find_pci_device(ahd_dev_softc_t pci)
246 {
247         uint64_t  full_id;
248         uint16_t  device;
249         uint16_t  vendor;
250         uint16_t  subdevice;
251         uint16_t  subvendor;
252         struct    ahd_pci_identity *entry;
253         u_int     i;
254
255         vendor = ahd_pci_read_config(pci, PCIR_DEVVENDOR, /*bytes*/2);
256         device = ahd_pci_read_config(pci, PCIR_DEVICE, /*bytes*/2);
257         subvendor = ahd_pci_read_config(pci, PCIR_SUBVEND_0, /*bytes*/2);
258         subdevice = ahd_pci_read_config(pci, PCIR_SUBDEV_0, /*bytes*/2);
259         full_id = ahd_compose_id(device,
260                                  vendor,
261                                  subdevice,
262                                  subvendor);
263
264         /*
265          * Controllers, mask out the IROC/HostRAID bit
266          */
267         
268         full_id &= ID_ALL_IROC_MASK;
269
270         for (i = 0; i < ahd_num_pci_devs; i++) {
271                 entry = &ahd_pci_ident_table[i];
272                 if (entry->full_id == (full_id & entry->id_mask)) {
273                         /* Honor exclusion entries. */
274                         if (entry->name == NULL)
275                                 return (NULL);
276                         return (entry);
277                 }
278         }
279         return (NULL);
280 }
281
282 int
283 ahd_pci_config(struct ahd_softc *ahd, struct ahd_pci_identity *entry)
284 {
285         struct scb_data *shared_scb_data;
286         u_long           l;
287         u_int            command;
288         uint32_t         devconfig;
289         uint16_t         subvendor; 
290         int              error;
291
292         shared_scb_data = NULL;
293         ahd->description = entry->name;
294         /*
295          * Record if this is an HP board.
296          */
297         subvendor = ahd_pci_read_config(ahd->dev_softc,
298                                         PCIR_SUBVEND_0, /*bytes*/2);
299         if (subvendor == SUBID_HP)
300                 ahd->flags |= AHD_HP_BOARD;
301
302         error = entry->setup(ahd);
303         if (error != 0)
304                 return (error);
305         
306         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
307         if ((devconfig & PCIXINITPAT) == PCIXINIT_PCI33_66) {
308                 ahd->chip |= AHD_PCI;
309                 /* Disable PCIX workarounds when running in PCI mode. */
310                 ahd->bugs &= ~AHD_PCIX_BUG_MASK;
311         } else {
312                 ahd->chip |= AHD_PCIX;
313         }
314         ahd->bus_description = pci_bus_modes[PCI_BUS_MODES_INDEX(devconfig)];
315
316         ahd_power_state_change(ahd, AHD_POWER_STATE_D0);
317
318         error = ahd_pci_map_registers(ahd);
319         if (error != 0)
320                 return (error);
321
322         /*
323          * If we need to support high memory, enable dual
324          * address cycles.  This bit must be set to enable
325          * high address bit generation even if we are on a
326          * 64bit bus (PCI64BIT set in devconfig).
327          */
328         if ((ahd->flags & (AHD_39BIT_ADDRESSING|AHD_64BIT_ADDRESSING)) != 0) {
329                 uint32_t devconfig;
330
331                 if (bootverbose)
332                         printf("%s: Enabling 39Bit Addressing\n",
333                                ahd_name(ahd));
334                 devconfig = ahd_pci_read_config(ahd->dev_softc,
335                                                 DEVCONFIG, /*bytes*/4);
336                 devconfig |= DACEN;
337                 ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
338                                      devconfig, /*bytes*/4);
339         }
340         
341         /* Ensure busmastering is enabled */
342         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
343         command |= PCIM_CMD_BUSMASTEREN;
344         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, /*bytes*/2);
345
346         error = ahd_softc_init(ahd);
347         if (error != 0)
348                 return (error);
349
350         ahd->bus_intr = ahd_pci_intr;
351
352         error = ahd_reset(ahd, /*reinit*/FALSE);
353         if (error != 0)
354                 return (ENXIO);
355
356         ahd->pci_cachesize =
357             ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME,
358                                 /*bytes*/1) & CACHESIZE;
359         ahd->pci_cachesize *= 4;
360
361         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
362         /* See if we have a SEEPROM and perform auto-term */
363         error = ahd_check_extport(ahd);
364         if (error != 0)
365                 return (error);
366
367         /* Core initialization */
368         error = ahd_init(ahd);
369         if (error != 0)
370                 return (error);
371
372         /*
373          * Allow interrupts now that we are completely setup.
374          */
375         error = ahd_pci_map_int(ahd);
376         if (error != 0)
377                 return (error);
378
379         ahd_list_lock(&l);
380         /*
381          * Link this softc in with all other ahd instances.
382          */
383         ahd_softc_insert(ahd);
384         ahd_list_unlock(&l);
385         return (0);
386 }
387
388 /*
389  * Perform some simple tests that should catch situations where
390  * our registers are invalidly mapped.
391  */
392 int
393 ahd_pci_test_register_access(struct ahd_softc *ahd)
394 {
395         uint32_t cmd;
396         u_int    targpcistat;
397         u_int    pci_status1;
398         int      error;
399         uint8_t  hcntrl;
400
401         error = EIO;
402
403         /*
404          * Enable PCI error interrupt status, but suppress NMIs
405          * generated by SERR raised due to target aborts.
406          */
407         cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
408         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
409                              cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
410
411         /*
412          * First a simple test to see if any
413          * registers can be read.  Reading
414          * HCNTRL has no side effects and has
415          * at least one bit that is guaranteed to
416          * be zero so it is a good register to
417          * use for this test.
418          */
419         hcntrl = ahd_inb(ahd, HCNTRL);
420         if (hcntrl == 0xFF)
421                 goto fail;
422
423         /*
424          * Next create a situation where write combining
425          * or read prefetching could be initiated by the
426          * CPU or host bridge.  Our device does not support
427          * either, so look for data corruption and/or flaged
428          * PCI errors.  First pause without causing another
429          * chip reset.
430          */
431         hcntrl &= ~CHIPRST;
432         ahd_outb(ahd, HCNTRL, hcntrl|PAUSE);
433         while (ahd_is_paused(ahd) == 0)
434                 ;
435
436         /* Clear any PCI errors that occurred before our driver attached. */
437         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
438         targpcistat = ahd_inb(ahd, TARGPCISTAT);
439         ahd_outb(ahd, TARGPCISTAT, targpcistat);
440         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
441                                           PCIR_STATUS + 1, /*bytes*/1);
442         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
443                              pci_status1, /*bytes*/1);
444         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
445         ahd_outb(ahd, CLRINT, CLRPCIINT);
446
447         ahd_outb(ahd, SEQCTL0, PERRORDIS);
448         ahd_outl(ahd, SRAM_BASE, 0x5aa555aa);
449         if (ahd_inl(ahd, SRAM_BASE) != 0x5aa555aa)
450                 goto fail;
451
452         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
453                 u_int targpcistat;
454
455                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
456                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
457                 if ((targpcistat & STA) != 0)
458                         goto fail;
459         }
460
461         error = 0;
462
463 fail:
464         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
465
466                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
467                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
468
469                 /* Silently clear any latched errors. */
470                 ahd_outb(ahd, TARGPCISTAT, targpcistat);
471                 pci_status1 = ahd_pci_read_config(ahd->dev_softc,
472                                                   PCIR_STATUS + 1, /*bytes*/1);
473                 ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
474                                      pci_status1, /*bytes*/1);
475                 ahd_outb(ahd, CLRINT, CLRPCIINT);
476         }
477         ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS);
478         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
479         return (error);
480 }
481
482 /*
483  * Check the external port logic for a serial eeprom
484  * and termination/cable detection contrls.
485  */
486 static int
487 ahd_check_extport(struct ahd_softc *ahd)
488 {
489         struct  vpd_config vpd;
490         struct  seeprom_config *sc;
491         u_int   adapter_control;
492         int     have_seeprom;
493         int     error;
494
495         sc = ahd->seep_config;
496         have_seeprom = ahd_acquire_seeprom(ahd);
497         if (have_seeprom) {
498                 u_int start_addr;
499
500                 /*
501                  * Fetch VPD for this function and parse it.
502                  */
503                 if (bootverbose) 
504                         printf("%s: Reading VPD from SEEPROM...",
505                                ahd_name(ahd));
506
507                 /* Address is always in units of 16bit words */
508                 start_addr = ((2 * sizeof(*sc))
509                             + (sizeof(vpd) * (ahd->channel - 'A'))) / 2;
510
511                 error = ahd_read_seeprom(ahd, (uint16_t *)&vpd,
512                                          start_addr, sizeof(vpd)/2,
513                                          /*bytestream*/TRUE);
514                 if (error == 0)
515                         error = ahd_parse_vpddata(ahd, &vpd);
516                 if (bootverbose) 
517                         printf("%s: VPD parsing %s\n",
518                                ahd_name(ahd),
519                                error == 0 ? "successful" : "failed");
520
521                 if (bootverbose) 
522                         printf("%s: Reading SEEPROM...", ahd_name(ahd));
523
524                 /* Address is always in units of 16bit words */
525                 start_addr = (sizeof(*sc) / 2) * (ahd->channel - 'A');
526
527                 error = ahd_read_seeprom(ahd, (uint16_t *)sc,
528                                          start_addr, sizeof(*sc)/2,
529                                          /*bytestream*/FALSE);
530
531                 if (error != 0) {
532                         printf("Unable to read SEEPROM\n");
533                         have_seeprom = 0;
534                 } else {
535                         have_seeprom = ahd_verify_cksum(sc);
536
537                         if (bootverbose) {
538                                 if (have_seeprom == 0)
539                                         printf ("checksum error\n");
540                                 else
541                                         printf ("done.\n");
542                         }
543                 }
544                 ahd_release_seeprom(ahd);
545         }
546
547         if (!have_seeprom) {
548                 u_int     nvram_scb;
549
550                 /*
551                  * Pull scratch ram settings and treat them as
552                  * if they are the contents of an seeprom if
553                  * the 'ADPT', 'BIOS', or 'ASPI' signature is found
554                  * in SCB 0xFF.  We manually compose the data as 16bit
555                  * values to avoid endian issues.
556                  */
557                 ahd_set_scbptr(ahd, 0xFF);
558                 nvram_scb = ahd_inb_scbram(ahd, SCB_BASE + NVRAM_SCB_OFFSET);
559                 if (nvram_scb != 0xFF
560                  && ((ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
561                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'D'
562                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
563                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'T')
564                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'B'
565                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'I'
566                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'O'
567                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'S')
568                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
569                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'S'
570                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
571                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'I'))) {
572                         uint16_t *sc_data;
573                         int       i;
574
575                         ahd_set_scbptr(ahd, nvram_scb);
576                         sc_data = (uint16_t *)sc;
577                         for (i = 0; i < 64; i += 2)
578                                 *sc_data++ = ahd_inw_scbram(ahd, SCB_BASE+i);
579                         have_seeprom = ahd_verify_cksum(sc);
580                         if (have_seeprom)
581                                 ahd->flags |= AHD_SCB_CONFIG_USED;
582                 }
583         }
584
585 #ifdef AHD_DEBUG
586         if (have_seeprom != 0
587          && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
588                 uint16_t *sc_data;
589                 int       i;
590
591                 printf("%s: Seeprom Contents:", ahd_name(ahd));
592                 sc_data = (uint16_t *)sc;
593                 for (i = 0; i < (sizeof(*sc)); i += 2)
594                         printf("\n\t0x%.4x", sc_data[i]);
595                 printf("\n");
596         }
597 #endif
598
599         if (!have_seeprom) {
600                 if (bootverbose)
601                         printf("%s: No SEEPROM available.\n", ahd_name(ahd));
602                 ahd->flags |= AHD_USEDEFAULTS;
603                 error = ahd_default_config(ahd);
604                 adapter_control = CFAUTOTERM|CFSEAUTOTERM;
605                 free(ahd->seep_config, M_DEVBUF);
606                 ahd->seep_config = NULL;
607         } else {
608                 error = ahd_parse_cfgdata(ahd, sc);
609                 adapter_control = sc->adapter_control;
610         }
611         if (error != 0)
612                 return (error);
613
614         ahd_configure_termination(ahd, adapter_control);
615
616         return (0);
617 }
618
619 static void
620 ahd_configure_termination(struct ahd_softc *ahd, u_int adapter_control)
621 {
622         int      error;
623         u_int    sxfrctl1;
624         uint8_t  termctl;
625         uint32_t devconfig;
626
627         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
628         devconfig &= ~STPWLEVEL;
629         if ((ahd->flags & AHD_STPWLEVEL_A) != 0)
630                 devconfig |= STPWLEVEL;
631         if (bootverbose)
632                 printf("%s: STPWLEVEL is %s\n",
633                        ahd_name(ahd), (devconfig & STPWLEVEL) ? "on" : "off");
634         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
635  
636         /* Make sure current sensing is off. */
637         if ((ahd->flags & AHD_CURRENT_SENSING) != 0) {
638                 (void)ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
639         }
640
641         /*
642          * Read to sense.  Write to set.
643          */
644         error = ahd_read_flexport(ahd, FLXADDR_TERMCTL, &termctl);
645         if ((adapter_control & CFAUTOTERM) == 0) {
646                 if (bootverbose)
647                         printf("%s: Manual Primary Termination\n",
648                                ahd_name(ahd));
649                 termctl &= ~(FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH);
650                 if ((adapter_control & CFSTERM) != 0)
651                         termctl |= FLX_TERMCTL_ENPRILOW;
652                 if ((adapter_control & CFWSTERM) != 0)
653                         termctl |= FLX_TERMCTL_ENPRIHIGH;
654         } else if (error != 0) {
655                 printf("%s: Primary Auto-Term Sensing failed! "
656                        "Using Defaults.\n", ahd_name(ahd));
657                 termctl = FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH;
658         }
659
660         if ((adapter_control & CFSEAUTOTERM) == 0) {
661                 if (bootverbose)
662                         printf("%s: Manual Secondary Termination\n",
663                                ahd_name(ahd));
664                 termctl &= ~(FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH);
665                 if ((adapter_control & CFSELOWTERM) != 0)
666                         termctl |= FLX_TERMCTL_ENSECLOW;
667                 if ((adapter_control & CFSEHIGHTERM) != 0)
668                         termctl |= FLX_TERMCTL_ENSECHIGH;
669         } else if (error != 0) {
670                 printf("%s: Secondary Auto-Term Sensing failed! "
671                        "Using Defaults.\n", ahd_name(ahd));
672                 termctl |= FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH;
673         }
674
675         /*
676          * Now set the termination based on what we found.
677          */
678         sxfrctl1 = ahd_inb(ahd, SXFRCTL1) & ~STPWEN;
679         if ((termctl & FLX_TERMCTL_ENPRILOW) != 0) {
680                 ahd->flags |= AHD_TERM_ENB_A;
681                 sxfrctl1 |= STPWEN;
682         }
683         /* Must set the latch once in order to be effective. */
684         ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
685         ahd_outb(ahd, SXFRCTL1, sxfrctl1);
686
687         error = ahd_write_flexport(ahd, FLXADDR_TERMCTL, termctl);
688         if (error != 0) {
689                 printf("%s: Unable to set termination settings!\n",
690                        ahd_name(ahd));
691         } else if (bootverbose) {
692                 printf("%s: Primary High byte termination %sabled\n",
693                        ahd_name(ahd),
694                        (termctl & FLX_TERMCTL_ENPRIHIGH) ? "En" : "Dis");
695
696                 printf("%s: Primary Low byte termination %sabled\n",
697                        ahd_name(ahd),
698                        (termctl & FLX_TERMCTL_ENPRILOW) ? "En" : "Dis");
699
700                 printf("%s: Secondary High byte termination %sabled\n",
701                        ahd_name(ahd),
702                        (termctl & FLX_TERMCTL_ENSECHIGH) ? "En" : "Dis");
703
704                 printf("%s: Secondary Low byte termination %sabled\n",
705                        ahd_name(ahd),
706                        (termctl & FLX_TERMCTL_ENSECLOW) ? "En" : "Dis");
707         }
708         return;
709 }
710
711 #define DPE     0x80
712 #define SSE     0x40
713 #define RMA     0x20
714 #define RTA     0x10
715 #define STA     0x08
716 #define DPR     0x01
717
718 static const char *split_status_source[] =
719 {
720         "DFF0",
721         "DFF1",
722         "OVLY",
723         "CMC",
724 };
725
726 static const char *pci_status_source[] =
727 {
728         "DFF0",
729         "DFF1",
730         "SG",
731         "CMC",
732         "OVLY",
733         "NONE",
734         "MSI",
735         "TARG"
736 };
737
738 static const char *split_status_strings[] =
739 {
740         "%s: Received split response in %s.\n",
741         "%s: Received split completion error message in %s\n",
742         "%s: Receive overrun in %s\n",
743         "%s: Count not complete in %s\n",
744         "%s: Split completion data bucket in %s\n",
745         "%s: Split completion address error in %s\n",
746         "%s: Split completion byte count error in %s\n",
747         "%s: Signaled Target-abort to early terminate a split in %s\n"
748 };
749
750 static const char *pci_status_strings[] =
751 {
752         "%s: Data Parity Error has been reported via PERR# in %s\n",
753         "%s: Target initial wait state error in %s\n",
754         "%s: Split completion read data parity error in %s\n",
755         "%s: Split completion address attribute parity error in %s\n",
756         "%s: Received a Target Abort in %s\n",
757         "%s: Received a Master Abort in %s\n",
758         "%s: Signal System Error Detected in %s\n",
759         "%s: Address or Write Phase Parity Error Detected in %s.\n"
760 };
761
762 void
763 ahd_pci_intr(struct ahd_softc *ahd)
764 {
765         uint8_t         pci_status[8];
766         ahd_mode_state  saved_modes;
767         u_int           pci_status1;
768         u_int           intstat;
769         u_int           i;
770         u_int           reg;
771         
772         intstat = ahd_inb(ahd, INTSTAT);
773
774         if ((intstat & SPLTINT) != 0)
775                 ahd_pci_split_intr(ahd, intstat);
776
777         if ((intstat & PCIINT) == 0)
778                 return;
779
780         printf("%s: PCI error Interrupt\n", ahd_name(ahd));
781         saved_modes = ahd_save_modes(ahd);
782         ahd_dump_card_state(ahd);
783         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
784         for (i = 0, reg = DF0PCISTAT; i < 8; i++, reg++) {
785
786                 if (i == 5)
787                         continue;
788                 pci_status[i] = ahd_inb(ahd, reg);
789                 /* Clear latched errors.  So our interrupt deasserts. */
790                 ahd_outb(ahd, reg, pci_status[i]);
791         }
792
793         for (i = 0; i < 8; i++) {
794                 u_int bit;
795         
796                 if (i == 5)
797                         continue;
798
799                 for (bit = 0; bit < 8; bit++) {
800
801                         if ((pci_status[i] & (0x1 << bit)) != 0) {
802                                 static const char *s;
803
804                                 s = pci_status_strings[bit];
805                                 if (i == 7/*TARG*/ && bit == 3)
806                                         s = "%s: Signaled Target Abort\n";
807                                 printf(s, ahd_name(ahd), pci_status_source[i]);
808                         }
809                 }       
810         }
811         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
812                                           PCIR_STATUS + 1, /*bytes*/1);
813         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
814                              pci_status1, /*bytes*/1);
815         ahd_restore_modes(ahd, saved_modes);
816         ahd_outb(ahd, CLRINT, CLRPCIINT);
817         ahd_unpause(ahd);
818 }
819
820 static void
821 ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat)
822 {
823         uint8_t         split_status[4];
824         uint8_t         split_status1[4];
825         uint8_t         sg_split_status[2];
826         uint8_t         sg_split_status1[2];
827         ahd_mode_state  saved_modes;
828         u_int           i;
829         uint16_t        pcix_status;
830
831         /*
832          * Check for splits in all modes.  Modes 0 and 1
833          * additionally have SG engine splits to look at.
834          */
835         pcix_status = ahd_pci_read_config(ahd->dev_softc, PCIXR_STATUS,
836                                           /*bytes*/2);
837         printf("%s: PCI Split Interrupt - PCI-X status = 0x%x\n",
838                ahd_name(ahd), pcix_status);
839         saved_modes = ahd_save_modes(ahd);
840         for (i = 0; i < 4; i++) {
841                 ahd_set_modes(ahd, i, i);
842
843                 split_status[i] = ahd_inb(ahd, DCHSPLTSTAT0);
844                 split_status1[i] = ahd_inb(ahd, DCHSPLTSTAT1);
845                 /* Clear latched errors.  So our interrupt deasserts. */
846                 ahd_outb(ahd, DCHSPLTSTAT0, split_status[i]);
847                 ahd_outb(ahd, DCHSPLTSTAT1, split_status1[i]);
848                 if (i > 1)
849                         continue;
850                 sg_split_status[i] = ahd_inb(ahd, SGSPLTSTAT0);
851                 sg_split_status1[i] = ahd_inb(ahd, SGSPLTSTAT1);
852                 /* Clear latched errors.  So our interrupt deasserts. */
853                 ahd_outb(ahd, SGSPLTSTAT0, sg_split_status[i]);
854                 ahd_outb(ahd, SGSPLTSTAT1, sg_split_status1[i]);
855         }
856
857         for (i = 0; i < 4; i++) {
858                 u_int bit;
859
860                 for (bit = 0; bit < 8; bit++) {
861
862                         if ((split_status[i] & (0x1 << bit)) != 0) {
863                                 static const char *s;
864
865                                 s = split_status_strings[bit];
866                                 printf(s, ahd_name(ahd),
867                                        split_status_source[i]);
868                         }
869
870                         if (i > 1)
871                                 continue;
872
873                         if ((sg_split_status[i] & (0x1 << bit)) != 0) {
874                                 static const char *s;
875
876                                 s = split_status_strings[bit];
877                                 printf(s, ahd_name(ahd), "SG");
878                         }
879                 }
880         }
881         /*
882          * Clear PCI-X status bits.
883          */
884         ahd_pci_write_config(ahd->dev_softc, PCIXR_STATUS,
885                              pcix_status, /*bytes*/2);
886         ahd_outb(ahd, CLRINT, CLRSPLTINT);
887         ahd_restore_modes(ahd, saved_modes);
888 }
889
890 static int
891 ahd_aic7901_setup(struct ahd_softc *ahd)
892 {
893
894         ahd->chip = AHD_AIC7901;
895         ahd->features = AHD_AIC7901_FE;
896         return (ahd_aic790X_setup(ahd));
897 }
898
899 static int
900 ahd_aic7901A_setup(struct ahd_softc *ahd)
901 {
902
903         ahd->chip = AHD_AIC7901A;
904         ahd->features = AHD_AIC7901A_FE;
905         return (ahd_aic790X_setup(ahd));
906 }
907
908 static int
909 ahd_aic7902_setup(struct ahd_softc *ahd)
910 {
911         ahd->chip = AHD_AIC7902;
912         ahd->features = AHD_AIC7902_FE;
913         return (ahd_aic790X_setup(ahd));
914 }
915
916 static int
917 ahd_aic790X_setup(struct ahd_softc *ahd)
918 {
919         ahd_dev_softc_t pci;
920         u_int rev;
921
922         pci = ahd->dev_softc;
923         rev = ahd_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
924         if (rev < ID_AIC7902_PCI_REV_A4) {
925                 printf("%s: Unable to attach to unsupported chip revision %d\n",
926                        ahd_name(ahd), rev);
927                 ahd_pci_write_config(pci, PCIR_COMMAND, 0, /*bytes*/2);
928                 return (ENXIO);
929         }
930         ahd->channel = ahd_get_pci_function(pci) + 'A';
931         if (rev < ID_AIC7902_PCI_REV_B0) {
932                 /*
933                  * Enable A series workarounds.
934                  */
935                 ahd->bugs |= AHD_SENT_SCB_UPDATE_BUG|AHD_ABORT_LQI_BUG
936                           |  AHD_PKT_BITBUCKET_BUG|AHD_LONG_SETIMO_BUG
937                           |  AHD_NLQICRC_DELAYED_BUG|AHD_SCSIRST_BUG
938                           |  AHD_LQO_ATNO_BUG|AHD_AUTOFLUSH_BUG
939                           |  AHD_CLRLQO_AUTOCLR_BUG|AHD_PCIX_MMAPIO_BUG
940                           |  AHD_PCIX_CHIPRST_BUG|AHD_PCIX_SCBRAM_RD_BUG
941                           |  AHD_PKTIZED_STATUS_BUG|AHD_PKT_LUN_BUG
942                           |  AHD_MDFF_WSCBPTR_BUG|AHD_REG_SLOW_SETTLE_BUG
943                           |  AHD_SET_MODE_BUG|AHD_BUSFREEREV_BUG
944                           |  AHD_NONPACKFIFO_BUG|AHD_PACED_NEGTABLE_BUG
945                           |  AHD_FAINT_LED_BUG;
946
947                 /*
948                  * IO Cell paramter setup.
949                  */
950                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
951
952                 if ((ahd->flags & AHD_HP_BOARD) == 0)
953                         AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
954         } else {
955                 u_int devconfig1;
956
957                 ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
958                               |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY;
959                 ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
960
961                 /*
962                  * Some issues have been resolved in the 7901B.
963                  */
964                 if ((ahd->features & AHD_MULTI_FUNC) != 0)
965                         ahd->bugs |= AHD_INTCOLLISION_BUG|AHD_ABORT_LQI_BUG;
966
967                 /*
968                  * IO Cell paramter setup.
969                  */
970                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
971                 AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVB);
972                 AHD_SET_AMPLITUDE(ahd, AHD_AMPLITUDE_DEF);
973
974                 /*
975                  * Set the PREQDIS bit for H2B which disables some workaround
976                  * that doesn't work on regular PCI busses.
977                  * XXX - Find out exactly what this does from the hardware
978                  *       folks!
979                  */
980                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
981                 ahd_pci_write_config(pci, DEVCONFIG1,
982                                      devconfig1|PREQDIS, /*bytes*/1);
983                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
984         }
985
986         return (0);
987 }