Merge branch 'irq-upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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#92 $
42  */
43
44 #ifdef __linux__
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #else
48 #include <dev/aic7xxx/aic79xx_osm.h>
49 #include <dev/aic7xxx/aic79xx_inline.h>
50 #endif
51
52 #include "aic79xx_pci.h"
53
54 static __inline uint64_t
55 ahd_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
56 {
57         uint64_t id;
58
59         id = subvendor
60            | (subdevice << 16)
61            | ((uint64_t)vendor << 32)
62            | ((uint64_t)device << 48);
63
64         return (id);
65 }
66
67 #define ID_AIC7902_PCI_REV_A4           0x3
68 #define ID_AIC7902_PCI_REV_B0           0x10
69 #define SUBID_HP                        0x0E11
70
71 #define DEVID_9005_HOSTRAID(id) ((id) & 0x80)
72
73 #define DEVID_9005_TYPE(id) ((id) & 0xF)
74 #define         DEVID_9005_TYPE_HBA             0x0     /* Standard Card */
75 #define         DEVID_9005_TYPE_HBA_2EXT        0x1     /* 2 External Ports */
76 #define         DEVID_9005_TYPE_IROC            0x8     /* Raid(0,1,10) Card */
77 #define         DEVID_9005_TYPE_MB              0xF     /* On Motherboard */
78
79 #define DEVID_9005_MFUNC(id) ((id) & 0x10)
80
81 #define DEVID_9005_PACKETIZED(id) ((id) & 0x8000)
82
83 #define SUBID_9005_TYPE(id) ((id) & 0xF)
84 #define         SUBID_9005_TYPE_HBA             0x0     /* Standard Card */
85 #define         SUBID_9005_TYPE_MB              0xF     /* On Motherboard */
86
87 #define SUBID_9005_AUTOTERM(id) (((id) & 0x10) == 0)
88
89 #define SUBID_9005_LEGACYCONN_FUNC(id) ((id) & 0x20)
90
91 #define SUBID_9005_SEEPTYPE(id) (((id) & 0x0C0) >> 6)
92 #define         SUBID_9005_SEEPTYPE_NONE        0x0
93 #define         SUBID_9005_SEEPTYPE_4K          0x1
94
95 static ahd_device_setup_t ahd_aic7901_setup;
96 static ahd_device_setup_t ahd_aic7901A_setup;
97 static ahd_device_setup_t ahd_aic7902_setup;
98 static ahd_device_setup_t ahd_aic790X_setup;
99
100 static struct ahd_pci_identity ahd_pci_ident_table [] =
101 {
102         /* aic7901 based controllers */
103         {
104                 ID_AHA_29320A,
105                 ID_ALL_MASK,
106                 "Adaptec 29320A Ultra320 SCSI adapter",
107                 ahd_aic7901_setup
108         },
109         {
110                 ID_AHA_29320ALP,
111                 ID_ALL_MASK,
112                 "Adaptec 29320ALP PCIx Ultra320 SCSI adapter",
113                 ahd_aic7901_setup
114         },
115         {
116                 ID_AHA_29320LPE,
117                 ID_ALL_MASK,
118                 "Adaptec 29320LPE PCIe Ultra320 SCSI adapter",
119                 ahd_aic7901_setup
120         },
121         /* aic7901A based controllers */
122         {
123                 ID_AHA_29320LP,
124                 ID_ALL_MASK,
125                 "Adaptec 29320LP Ultra320 SCSI adapter",
126                 ahd_aic7901A_setup
127         },
128         /* aic7902 based controllers */ 
129         {
130                 ID_AHA_29320,
131                 ID_ALL_MASK,
132                 "Adaptec 29320 Ultra320 SCSI adapter",
133                 ahd_aic7902_setup
134         },
135         {
136                 ID_AHA_29320B,
137                 ID_ALL_MASK,
138                 "Adaptec 29320B Ultra320 SCSI adapter",
139                 ahd_aic7902_setup
140         },
141         {
142                 ID_AHA_39320,
143                 ID_ALL_MASK,
144                 "Adaptec 39320 Ultra320 SCSI adapter",
145                 ahd_aic7902_setup
146         },
147         {
148                 ID_AHA_39320_B,
149                 ID_ALL_MASK,
150                 "Adaptec 39320 Ultra320 SCSI adapter",
151                 ahd_aic7902_setup
152         },
153         {
154                 ID_AHA_39320_B_DELL,
155                 ID_ALL_MASK,
156                 "Adaptec (Dell OEM) 39320 Ultra320 SCSI adapter",
157                 ahd_aic7902_setup
158         },
159         {
160                 ID_AHA_39320A,
161                 ID_ALL_MASK,
162                 "Adaptec 39320A Ultra320 SCSI adapter",
163                 ahd_aic7902_setup
164         },
165         {
166                 ID_AHA_39320D,
167                 ID_ALL_MASK,
168                 "Adaptec 39320D Ultra320 SCSI adapter",
169                 ahd_aic7902_setup
170         },
171         {
172                 ID_AHA_39320D_HP,
173                 ID_ALL_MASK,
174                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
175                 ahd_aic7902_setup
176         },
177         {
178                 ID_AHA_39320D_B,
179                 ID_ALL_MASK,
180                 "Adaptec 39320D Ultra320 SCSI adapter",
181                 ahd_aic7902_setup
182         },
183         {
184                 ID_AHA_39320D_B_HP,
185                 ID_ALL_MASK,
186                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
187                 ahd_aic7902_setup
188         },
189         /* Generic chip probes for devices we don't know 'exactly' */
190         {
191                 ID_AIC7901 & ID_9005_GENERIC_MASK,
192                 ID_9005_GENERIC_MASK,
193                 "Adaptec AIC7901 Ultra320 SCSI adapter",
194                 ahd_aic7901_setup
195         },
196         {
197                 ID_AIC7901A & ID_DEV_VENDOR_MASK,
198                 ID_DEV_VENDOR_MASK,
199                 "Adaptec AIC7901A Ultra320 SCSI adapter",
200                 ahd_aic7901A_setup
201         },
202         {
203                 ID_AIC7902 & ID_9005_GENERIC_MASK,
204                 ID_9005_GENERIC_MASK,
205                 "Adaptec AIC7902 Ultra320 SCSI adapter",
206                 ahd_aic7902_setup
207         }
208 };
209
210 static const u_int ahd_num_pci_devs = ARRAY_SIZE(ahd_pci_ident_table);
211                 
212 #define DEVCONFIG               0x40
213 #define         PCIXINITPAT     0x0000E000ul
214 #define                 PCIXINIT_PCI33_66       0x0000E000ul
215 #define                 PCIXINIT_PCIX50_66      0x0000C000ul
216 #define                 PCIXINIT_PCIX66_100     0x0000A000ul
217 #define                 PCIXINIT_PCIX100_133    0x00008000ul
218 #define PCI_BUS_MODES_INDEX(devconfig)  \
219         (((devconfig) & PCIXINITPAT) >> 13)
220 static const char *pci_bus_modes[] =
221 {
222         "PCI bus mode unknown",
223         "PCI bus mode unknown",
224         "PCI bus mode unknown",
225         "PCI bus mode unknown",
226         "PCI-X 101-133Mhz",
227         "PCI-X 67-100Mhz",
228         "PCI-X 50-66Mhz",
229         "PCI 33 or 66Mhz"
230 };
231
232 #define         TESTMODE        0x00000800ul
233 #define         IRDY_RST        0x00000200ul
234 #define         FRAME_RST       0x00000100ul
235 #define         PCI64BIT        0x00000080ul
236 #define         MRDCEN          0x00000040ul
237 #define         ENDIANSEL       0x00000020ul
238 #define         MIXQWENDIANEN   0x00000008ul
239 #define         DACEN           0x00000004ul
240 #define         STPWLEVEL       0x00000002ul
241 #define         QWENDIANSEL     0x00000001ul
242
243 #define DEVCONFIG1              0x44
244 #define         PREQDIS         0x01
245
246 #define CSIZE_LATTIME           0x0c
247 #define         CACHESIZE       0x000000fful
248 #define         LATTIME         0x0000ff00ul
249
250 static int      ahd_check_extport(struct ahd_softc *ahd);
251 static void     ahd_configure_termination(struct ahd_softc *ahd,
252                                           u_int adapter_control);
253 static void     ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat);
254 static void     ahd_pci_intr(struct ahd_softc *ahd);
255
256 struct ahd_pci_identity *
257 ahd_find_pci_device(ahd_dev_softc_t pci)
258 {
259         uint64_t  full_id;
260         uint16_t  device;
261         uint16_t  vendor;
262         uint16_t  subdevice;
263         uint16_t  subvendor;
264         struct    ahd_pci_identity *entry;
265         u_int     i;
266
267         vendor = ahd_pci_read_config(pci, PCIR_DEVVENDOR, /*bytes*/2);
268         device = ahd_pci_read_config(pci, PCIR_DEVICE, /*bytes*/2);
269         subvendor = ahd_pci_read_config(pci, PCIR_SUBVEND_0, /*bytes*/2);
270         subdevice = ahd_pci_read_config(pci, PCIR_SUBDEV_0, /*bytes*/2);
271         full_id = ahd_compose_id(device,
272                                  vendor,
273                                  subdevice,
274                                  subvendor);
275
276         /*
277          * Controllers, mask out the IROC/HostRAID bit
278          */
279         
280         full_id &= ID_ALL_IROC_MASK;
281
282         for (i = 0; i < ahd_num_pci_devs; i++) {
283                 entry = &ahd_pci_ident_table[i];
284                 if (entry->full_id == (full_id & entry->id_mask)) {
285                         /* Honor exclusion entries. */
286                         if (entry->name == NULL)
287                                 return (NULL);
288                         return (entry);
289                 }
290         }
291         return (NULL);
292 }
293
294 int
295 ahd_pci_config(struct ahd_softc *ahd, struct ahd_pci_identity *entry)
296 {
297         struct scb_data *shared_scb_data;
298         u_int            command;
299         uint32_t         devconfig;
300         uint16_t         subvendor; 
301         int              error;
302
303         shared_scb_data = NULL;
304         ahd->description = entry->name;
305         /*
306          * Record if this is an HP board.
307          */
308         subvendor = ahd_pci_read_config(ahd->dev_softc,
309                                         PCIR_SUBVEND_0, /*bytes*/2);
310         if (subvendor == SUBID_HP)
311                 ahd->flags |= AHD_HP_BOARD;
312
313         error = entry->setup(ahd);
314         if (error != 0)
315                 return (error);
316         
317         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
318         if ((devconfig & PCIXINITPAT) == PCIXINIT_PCI33_66) {
319                 ahd->chip |= AHD_PCI;
320                 /* Disable PCIX workarounds when running in PCI mode. */
321                 ahd->bugs &= ~AHD_PCIX_BUG_MASK;
322         } else {
323                 ahd->chip |= AHD_PCIX;
324         }
325         ahd->bus_description = pci_bus_modes[PCI_BUS_MODES_INDEX(devconfig)];
326
327         ahd_power_state_change(ahd, AHD_POWER_STATE_D0);
328
329         error = ahd_pci_map_registers(ahd);
330         if (error != 0)
331                 return (error);
332
333         /*
334          * If we need to support high memory, enable dual
335          * address cycles.  This bit must be set to enable
336          * high address bit generation even if we are on a
337          * 64bit bus (PCI64BIT set in devconfig).
338          */
339         if ((ahd->flags & (AHD_39BIT_ADDRESSING|AHD_64BIT_ADDRESSING)) != 0) {
340                 uint32_t devconfig;
341
342                 if (bootverbose)
343                         printf("%s: Enabling 39Bit Addressing\n",
344                                ahd_name(ahd));
345                 devconfig = ahd_pci_read_config(ahd->dev_softc,
346                                                 DEVCONFIG, /*bytes*/4);
347                 devconfig |= DACEN;
348                 ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
349                                      devconfig, /*bytes*/4);
350         }
351         
352         /* Ensure busmastering is enabled */
353         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
354         command |= PCIM_CMD_BUSMASTEREN;
355         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, /*bytes*/2);
356
357         error = ahd_softc_init(ahd);
358         if (error != 0)
359                 return (error);
360
361         ahd->bus_intr = ahd_pci_intr;
362
363         error = ahd_reset(ahd, /*reinit*/FALSE);
364         if (error != 0)
365                 return (ENXIO);
366
367         ahd->pci_cachesize =
368             ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME,
369                                 /*bytes*/1) & CACHESIZE;
370         ahd->pci_cachesize *= 4;
371
372         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
373         /* See if we have a SEEPROM and perform auto-term */
374         error = ahd_check_extport(ahd);
375         if (error != 0)
376                 return (error);
377
378         /* Core initialization */
379         error = ahd_init(ahd);
380         if (error != 0)
381                 return (error);
382
383         /*
384          * Allow interrupts now that we are completely setup.
385          */
386         error = ahd_pci_map_int(ahd);
387         if (!error)
388                 ahd->init_level++;
389         return error;
390 }
391
392 void
393 ahd_pci_suspend(struct ahd_softc *ahd)
394 {
395         /*
396          * Save chip register configuration data for chip resets
397          * that occur during runtime and resume events.
398          */
399         ahd->suspend_state.pci_state.devconfig =
400             ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
401         ahd->suspend_state.pci_state.command =
402             ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
403         ahd->suspend_state.pci_state.csize_lattime =
404             ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME, /*bytes*/1);
405
406 }
407
408 void
409 ahd_pci_resume(struct ahd_softc *ahd)
410 {
411         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
412                              ahd->suspend_state.pci_state.devconfig, /*bytes*/4);
413         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
414                              ahd->suspend_state.pci_state.command, /*bytes*/1);
415         ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
416                              ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
417 }
418
419 /*
420  * Perform some simple tests that should catch situations where
421  * our registers are invalidly mapped.
422  */
423 int
424 ahd_pci_test_register_access(struct ahd_softc *ahd)
425 {
426         uint32_t cmd;
427         u_int    targpcistat;
428         u_int    pci_status1;
429         int      error;
430         uint8_t  hcntrl;
431
432         error = EIO;
433
434         /*
435          * Enable PCI error interrupt status, but suppress NMIs
436          * generated by SERR raised due to target aborts.
437          */
438         cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
439         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
440                              cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
441
442         /*
443          * First a simple test to see if any
444          * registers can be read.  Reading
445          * HCNTRL has no side effects and has
446          * at least one bit that is guaranteed to
447          * be zero so it is a good register to
448          * use for this test.
449          */
450         hcntrl = ahd_inb(ahd, HCNTRL);
451         if (hcntrl == 0xFF)
452                 goto fail;
453
454         /*
455          * Next create a situation where write combining
456          * or read prefetching could be initiated by the
457          * CPU or host bridge.  Our device does not support
458          * either, so look for data corruption and/or flaged
459          * PCI errors.  First pause without causing another
460          * chip reset.
461          */
462         hcntrl &= ~CHIPRST;
463         ahd_outb(ahd, HCNTRL, hcntrl|PAUSE);
464         while (ahd_is_paused(ahd) == 0)
465                 ;
466
467         /* Clear any PCI errors that occurred before our driver attached. */
468         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
469         targpcistat = ahd_inb(ahd, TARGPCISTAT);
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_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
476         ahd_outb(ahd, CLRINT, CLRPCIINT);
477
478         ahd_outb(ahd, SEQCTL0, PERRORDIS);
479         ahd_outl(ahd, SRAM_BASE, 0x5aa555aa);
480         if (ahd_inl(ahd, SRAM_BASE) != 0x5aa555aa)
481                 goto fail;
482
483         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
484                 u_int targpcistat;
485
486                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
487                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
488                 if ((targpcistat & STA) != 0)
489                         goto fail;
490         }
491
492         error = 0;
493
494 fail:
495         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
496
497                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
498                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
499
500                 /* Silently clear any latched errors. */
501                 ahd_outb(ahd, TARGPCISTAT, targpcistat);
502                 pci_status1 = ahd_pci_read_config(ahd->dev_softc,
503                                                   PCIR_STATUS + 1, /*bytes*/1);
504                 ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
505                                      pci_status1, /*bytes*/1);
506                 ahd_outb(ahd, CLRINT, CLRPCIINT);
507         }
508         ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS);
509         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
510         return (error);
511 }
512
513 /*
514  * Check the external port logic for a serial eeprom
515  * and termination/cable detection contrls.
516  */
517 static int
518 ahd_check_extport(struct ahd_softc *ahd)
519 {
520         struct  vpd_config vpd;
521         struct  seeprom_config *sc;
522         u_int   adapter_control;
523         int     have_seeprom;
524         int     error;
525
526         sc = ahd->seep_config;
527         have_seeprom = ahd_acquire_seeprom(ahd);
528         if (have_seeprom) {
529                 u_int start_addr;
530
531                 /*
532                  * Fetch VPD for this function and parse it.
533                  */
534                 if (bootverbose) 
535                         printf("%s: Reading VPD from SEEPROM...",
536                                ahd_name(ahd));
537
538                 /* Address is always in units of 16bit words */
539                 start_addr = ((2 * sizeof(*sc))
540                             + (sizeof(vpd) * (ahd->channel - 'A'))) / 2;
541
542                 error = ahd_read_seeprom(ahd, (uint16_t *)&vpd,
543                                          start_addr, sizeof(vpd)/2,
544                                          /*bytestream*/TRUE);
545                 if (error == 0)
546                         error = ahd_parse_vpddata(ahd, &vpd);
547                 if (bootverbose) 
548                         printf("%s: VPD parsing %s\n",
549                                ahd_name(ahd),
550                                error == 0 ? "successful" : "failed");
551
552                 if (bootverbose) 
553                         printf("%s: Reading SEEPROM...", ahd_name(ahd));
554
555                 /* Address is always in units of 16bit words */
556                 start_addr = (sizeof(*sc) / 2) * (ahd->channel - 'A');
557
558                 error = ahd_read_seeprom(ahd, (uint16_t *)sc,
559                                          start_addr, sizeof(*sc)/2,
560                                          /*bytestream*/FALSE);
561
562                 if (error != 0) {
563                         printf("Unable to read SEEPROM\n");
564                         have_seeprom = 0;
565                 } else {
566                         have_seeprom = ahd_verify_cksum(sc);
567
568                         if (bootverbose) {
569                                 if (have_seeprom == 0)
570                                         printf ("checksum error\n");
571                                 else
572                                         printf ("done.\n");
573                         }
574                 }
575                 ahd_release_seeprom(ahd);
576         }
577
578         if (!have_seeprom) {
579                 u_int     nvram_scb;
580
581                 /*
582                  * Pull scratch ram settings and treat them as
583                  * if they are the contents of an seeprom if
584                  * the 'ADPT', 'BIOS', or 'ASPI' signature is found
585                  * in SCB 0xFF.  We manually compose the data as 16bit
586                  * values to avoid endian issues.
587                  */
588                 ahd_set_scbptr(ahd, 0xFF);
589                 nvram_scb = ahd_inb_scbram(ahd, SCB_BASE + NVRAM_SCB_OFFSET);
590                 if (nvram_scb != 0xFF
591                  && ((ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
592                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'D'
593                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
594                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'T')
595                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'B'
596                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'I'
597                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'O'
598                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'S')
599                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
600                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'S'
601                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
602                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'I'))) {
603                         uint16_t *sc_data;
604                         int       i;
605
606                         ahd_set_scbptr(ahd, nvram_scb);
607                         sc_data = (uint16_t *)sc;
608                         for (i = 0; i < 64; i += 2)
609                                 *sc_data++ = ahd_inw_scbram(ahd, SCB_BASE+i);
610                         have_seeprom = ahd_verify_cksum(sc);
611                         if (have_seeprom)
612                                 ahd->flags |= AHD_SCB_CONFIG_USED;
613                 }
614         }
615
616 #ifdef AHD_DEBUG
617         if (have_seeprom != 0
618          && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
619                 uint16_t *sc_data;
620                 int       i;
621
622                 printf("%s: Seeprom Contents:", ahd_name(ahd));
623                 sc_data = (uint16_t *)sc;
624                 for (i = 0; i < (sizeof(*sc)); i += 2)
625                         printf("\n\t0x%.4x", sc_data[i]);
626                 printf("\n");
627         }
628 #endif
629
630         if (!have_seeprom) {
631                 if (bootverbose)
632                         printf("%s: No SEEPROM available.\n", ahd_name(ahd));
633                 ahd->flags |= AHD_USEDEFAULTS;
634                 error = ahd_default_config(ahd);
635                 adapter_control = CFAUTOTERM|CFSEAUTOTERM;
636                 free(ahd->seep_config, M_DEVBUF);
637                 ahd->seep_config = NULL;
638         } else {
639                 error = ahd_parse_cfgdata(ahd, sc);
640                 adapter_control = sc->adapter_control;
641         }
642         if (error != 0)
643                 return (error);
644
645         ahd_configure_termination(ahd, adapter_control);
646
647         return (0);
648 }
649
650 static void
651 ahd_configure_termination(struct ahd_softc *ahd, u_int adapter_control)
652 {
653         int      error;
654         u_int    sxfrctl1;
655         uint8_t  termctl;
656         uint32_t devconfig;
657
658         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
659         devconfig &= ~STPWLEVEL;
660         if ((ahd->flags & AHD_STPWLEVEL_A) != 0)
661                 devconfig |= STPWLEVEL;
662         if (bootverbose)
663                 printf("%s: STPWLEVEL is %s\n",
664                        ahd_name(ahd), (devconfig & STPWLEVEL) ? "on" : "off");
665         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
666  
667         /* Make sure current sensing is off. */
668         if ((ahd->flags & AHD_CURRENT_SENSING) != 0) {
669                 (void)ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
670         }
671
672         /*
673          * Read to sense.  Write to set.
674          */
675         error = ahd_read_flexport(ahd, FLXADDR_TERMCTL, &termctl);
676         if ((adapter_control & CFAUTOTERM) == 0) {
677                 if (bootverbose)
678                         printf("%s: Manual Primary Termination\n",
679                                ahd_name(ahd));
680                 termctl &= ~(FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH);
681                 if ((adapter_control & CFSTERM) != 0)
682                         termctl |= FLX_TERMCTL_ENPRILOW;
683                 if ((adapter_control & CFWSTERM) != 0)
684                         termctl |= FLX_TERMCTL_ENPRIHIGH;
685         } else if (error != 0) {
686                 printf("%s: Primary Auto-Term Sensing failed! "
687                        "Using Defaults.\n", ahd_name(ahd));
688                 termctl = FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH;
689         }
690
691         if ((adapter_control & CFSEAUTOTERM) == 0) {
692                 if (bootverbose)
693                         printf("%s: Manual Secondary Termination\n",
694                                ahd_name(ahd));
695                 termctl &= ~(FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH);
696                 if ((adapter_control & CFSELOWTERM) != 0)
697                         termctl |= FLX_TERMCTL_ENSECLOW;
698                 if ((adapter_control & CFSEHIGHTERM) != 0)
699                         termctl |= FLX_TERMCTL_ENSECHIGH;
700         } else if (error != 0) {
701                 printf("%s: Secondary Auto-Term Sensing failed! "
702                        "Using Defaults.\n", ahd_name(ahd));
703                 termctl |= FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH;
704         }
705
706         /*
707          * Now set the termination based on what we found.
708          */
709         sxfrctl1 = ahd_inb(ahd, SXFRCTL1) & ~STPWEN;
710         ahd->flags &= ~AHD_TERM_ENB_A;
711         if ((termctl & FLX_TERMCTL_ENPRILOW) != 0) {
712                 ahd->flags |= AHD_TERM_ENB_A;
713                 sxfrctl1 |= STPWEN;
714         }
715         /* Must set the latch once in order to be effective. */
716         ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
717         ahd_outb(ahd, SXFRCTL1, sxfrctl1);
718
719         error = ahd_write_flexport(ahd, FLXADDR_TERMCTL, termctl);
720         if (error != 0) {
721                 printf("%s: Unable to set termination settings!\n",
722                        ahd_name(ahd));
723         } else if (bootverbose) {
724                 printf("%s: Primary High byte termination %sabled\n",
725                        ahd_name(ahd),
726                        (termctl & FLX_TERMCTL_ENPRIHIGH) ? "En" : "Dis");
727
728                 printf("%s: Primary Low byte termination %sabled\n",
729                        ahd_name(ahd),
730                        (termctl & FLX_TERMCTL_ENPRILOW) ? "En" : "Dis");
731
732                 printf("%s: Secondary High byte termination %sabled\n",
733                        ahd_name(ahd),
734                        (termctl & FLX_TERMCTL_ENSECHIGH) ? "En" : "Dis");
735
736                 printf("%s: Secondary Low byte termination %sabled\n",
737                        ahd_name(ahd),
738                        (termctl & FLX_TERMCTL_ENSECLOW) ? "En" : "Dis");
739         }
740         return;
741 }
742
743 #define DPE     0x80
744 #define SSE     0x40
745 #define RMA     0x20
746 #define RTA     0x10
747 #define STA     0x08
748 #define DPR     0x01
749
750 static const char *split_status_source[] =
751 {
752         "DFF0",
753         "DFF1",
754         "OVLY",
755         "CMC",
756 };
757
758 static const char *pci_status_source[] =
759 {
760         "DFF0",
761         "DFF1",
762         "SG",
763         "CMC",
764         "OVLY",
765         "NONE",
766         "MSI",
767         "TARG"
768 };
769
770 static const char *split_status_strings[] =
771 {
772         "%s: Received split response in %s.\n",
773         "%s: Received split completion error message in %s\n",
774         "%s: Receive overrun in %s\n",
775         "%s: Count not complete in %s\n",
776         "%s: Split completion data bucket in %s\n",
777         "%s: Split completion address error in %s\n",
778         "%s: Split completion byte count error in %s\n",
779         "%s: Signaled Target-abort to early terminate a split in %s\n"
780 };
781
782 static const char *pci_status_strings[] =
783 {
784         "%s: Data Parity Error has been reported via PERR# in %s\n",
785         "%s: Target initial wait state error in %s\n",
786         "%s: Split completion read data parity error in %s\n",
787         "%s: Split completion address attribute parity error in %s\n",
788         "%s: Received a Target Abort in %s\n",
789         "%s: Received a Master Abort in %s\n",
790         "%s: Signal System Error Detected in %s\n",
791         "%s: Address or Write Phase Parity Error Detected in %s.\n"
792 };
793
794 static void
795 ahd_pci_intr(struct ahd_softc *ahd)
796 {
797         uint8_t         pci_status[8];
798         ahd_mode_state  saved_modes;
799         u_int           pci_status1;
800         u_int           intstat;
801         u_int           i;
802         u_int           reg;
803         
804         intstat = ahd_inb(ahd, INTSTAT);
805
806         if ((intstat & SPLTINT) != 0)
807                 ahd_pci_split_intr(ahd, intstat);
808
809         if ((intstat & PCIINT) == 0)
810                 return;
811
812         printf("%s: PCI error Interrupt\n", ahd_name(ahd));
813         saved_modes = ahd_save_modes(ahd);
814         ahd_dump_card_state(ahd);
815         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
816         for (i = 0, reg = DF0PCISTAT; i < 8; i++, reg++) {
817
818                 if (i == 5)
819                         continue;
820                 pci_status[i] = ahd_inb(ahd, reg);
821                 /* Clear latched errors.  So our interrupt deasserts. */
822                 ahd_outb(ahd, reg, pci_status[i]);
823         }
824
825         for (i = 0; i < 8; i++) {
826                 u_int bit;
827         
828                 if (i == 5)
829                         continue;
830
831                 for (bit = 0; bit < 8; bit++) {
832
833                         if ((pci_status[i] & (0x1 << bit)) != 0) {
834                                 static const char *s;
835
836                                 s = pci_status_strings[bit];
837                                 if (i == 7/*TARG*/ && bit == 3)
838                                         s = "%s: Signaled Target Abort\n";
839                                 printf(s, ahd_name(ahd), pci_status_source[i]);
840                         }
841                 }       
842         }
843         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
844                                           PCIR_STATUS + 1, /*bytes*/1);
845         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
846                              pci_status1, /*bytes*/1);
847         ahd_restore_modes(ahd, saved_modes);
848         ahd_outb(ahd, CLRINT, CLRPCIINT);
849         ahd_unpause(ahd);
850 }
851
852 static void
853 ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat)
854 {
855         uint8_t         split_status[4];
856         uint8_t         split_status1[4];
857         uint8_t         sg_split_status[2];
858         uint8_t         sg_split_status1[2];
859         ahd_mode_state  saved_modes;
860         u_int           i;
861         uint16_t        pcix_status;
862
863         /*
864          * Check for splits in all modes.  Modes 0 and 1
865          * additionally have SG engine splits to look at.
866          */
867         pcix_status = ahd_pci_read_config(ahd->dev_softc, PCIXR_STATUS,
868                                           /*bytes*/2);
869         printf("%s: PCI Split Interrupt - PCI-X status = 0x%x\n",
870                ahd_name(ahd), pcix_status);
871         saved_modes = ahd_save_modes(ahd);
872         for (i = 0; i < 4; i++) {
873                 ahd_set_modes(ahd, i, i);
874
875                 split_status[i] = ahd_inb(ahd, DCHSPLTSTAT0);
876                 split_status1[i] = ahd_inb(ahd, DCHSPLTSTAT1);
877                 /* Clear latched errors.  So our interrupt deasserts. */
878                 ahd_outb(ahd, DCHSPLTSTAT0, split_status[i]);
879                 ahd_outb(ahd, DCHSPLTSTAT1, split_status1[i]);
880                 if (i > 1)
881                         continue;
882                 sg_split_status[i] = ahd_inb(ahd, SGSPLTSTAT0);
883                 sg_split_status1[i] = ahd_inb(ahd, SGSPLTSTAT1);
884                 /* Clear latched errors.  So our interrupt deasserts. */
885                 ahd_outb(ahd, SGSPLTSTAT0, sg_split_status[i]);
886                 ahd_outb(ahd, SGSPLTSTAT1, sg_split_status1[i]);
887         }
888
889         for (i = 0; i < 4; i++) {
890                 u_int bit;
891
892                 for (bit = 0; bit < 8; bit++) {
893
894                         if ((split_status[i] & (0x1 << bit)) != 0) {
895                                 static const char *s;
896
897                                 s = split_status_strings[bit];
898                                 printf(s, ahd_name(ahd),
899                                        split_status_source[i]);
900                         }
901
902                         if (i > 1)
903                                 continue;
904
905                         if ((sg_split_status[i] & (0x1 << bit)) != 0) {
906                                 static const char *s;
907
908                                 s = split_status_strings[bit];
909                                 printf(s, ahd_name(ahd), "SG");
910                         }
911                 }
912         }
913         /*
914          * Clear PCI-X status bits.
915          */
916         ahd_pci_write_config(ahd->dev_softc, PCIXR_STATUS,
917                              pcix_status, /*bytes*/2);
918         ahd_outb(ahd, CLRINT, CLRSPLTINT);
919         ahd_restore_modes(ahd, saved_modes);
920 }
921
922 static int
923 ahd_aic7901_setup(struct ahd_softc *ahd)
924 {
925
926         ahd->chip = AHD_AIC7901;
927         ahd->features = AHD_AIC7901_FE;
928         return (ahd_aic790X_setup(ahd));
929 }
930
931 static int
932 ahd_aic7901A_setup(struct ahd_softc *ahd)
933 {
934
935         ahd->chip = AHD_AIC7901A;
936         ahd->features = AHD_AIC7901A_FE;
937         return (ahd_aic790X_setup(ahd));
938 }
939
940 static int
941 ahd_aic7902_setup(struct ahd_softc *ahd)
942 {
943         ahd->chip = AHD_AIC7902;
944         ahd->features = AHD_AIC7902_FE;
945         return (ahd_aic790X_setup(ahd));
946 }
947
948 static int
949 ahd_aic790X_setup(struct ahd_softc *ahd)
950 {
951         ahd_dev_softc_t pci;
952         u_int rev;
953
954         pci = ahd->dev_softc;
955         rev = ahd_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
956         if (rev < ID_AIC7902_PCI_REV_A4) {
957                 printf("%s: Unable to attach to unsupported chip revision %d\n",
958                        ahd_name(ahd), rev);
959                 ahd_pci_write_config(pci, PCIR_COMMAND, 0, /*bytes*/2);
960                 return (ENXIO);
961         }
962         ahd->channel = ahd_get_pci_function(pci) + 'A';
963         if (rev < ID_AIC7902_PCI_REV_B0) {
964                 /*
965                  * Enable A series workarounds.
966                  */
967                 ahd->bugs |= AHD_SENT_SCB_UPDATE_BUG|AHD_ABORT_LQI_BUG
968                           |  AHD_PKT_BITBUCKET_BUG|AHD_LONG_SETIMO_BUG
969                           |  AHD_NLQICRC_DELAYED_BUG|AHD_SCSIRST_BUG
970                           |  AHD_LQO_ATNO_BUG|AHD_AUTOFLUSH_BUG
971                           |  AHD_CLRLQO_AUTOCLR_BUG|AHD_PCIX_MMAPIO_BUG
972                           |  AHD_PCIX_CHIPRST_BUG|AHD_PCIX_SCBRAM_RD_BUG
973                           |  AHD_PKTIZED_STATUS_BUG|AHD_PKT_LUN_BUG
974                           |  AHD_MDFF_WSCBPTR_BUG|AHD_REG_SLOW_SETTLE_BUG
975                           |  AHD_SET_MODE_BUG|AHD_BUSFREEREV_BUG
976                           |  AHD_NONPACKFIFO_BUG|AHD_PACED_NEGTABLE_BUG
977                           |  AHD_FAINT_LED_BUG;
978
979                 /*
980                  * IO Cell paramter setup.
981                  */
982                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
983
984                 if ((ahd->flags & AHD_HP_BOARD) == 0)
985                         AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
986         } else {
987                 /* This is revision B and newer. */
988                 extern uint32_t aic79xx_slowcrc;
989                 u_int devconfig1;
990
991                 ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
992                               |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY
993                               |  AHD_BUSFREEREV_BUG;
994                 ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
995
996                 /* If the user requested that the SLOWCRC bit to be set. */
997                 if (aic79xx_slowcrc)
998                         ahd->features |= AHD_AIC79XXB_SLOWCRC;
999
1000                 /*
1001                  * Some issues have been resolved in the 7901B.
1002                  */
1003                 if ((ahd->features & AHD_MULTI_FUNC) != 0)
1004                         ahd->bugs |= AHD_INTCOLLISION_BUG|AHD_ABORT_LQI_BUG;
1005
1006                 /*
1007                  * IO Cell paramter setup.
1008                  */
1009                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
1010                 AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVB);
1011                 AHD_SET_AMPLITUDE(ahd, AHD_AMPLITUDE_DEF);
1012
1013                 /*
1014                  * Set the PREQDIS bit for H2B which disables some workaround
1015                  * that doesn't work on regular PCI busses.
1016                  * XXX - Find out exactly what this does from the hardware
1017                  *       folks!
1018                  */
1019                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1020                 ahd_pci_write_config(pci, DEVCONFIG1,
1021                                      devconfig1|PREQDIS, /*bytes*/1);
1022                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1023         }
1024
1025         return (0);
1026 }