git.oblomov.eu Git - linux-2.6/blob - 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 const 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 const 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         const 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, const 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 #ifdef CONFIG_PM
 393 void
 394 ahd_pci_suspend(struct ahd_softc *ahd)
 395 {
 396         /*
 397          * Save chip register configuration data for chip resets
 398          * that occur during runtime and resume events.
 399          */
 400         ahd->suspend_state.pci_state.devconfig =
 401             ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 402         ahd->suspend_state.pci_state.command =
 403             ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
 404         ahd->suspend_state.pci_state.csize_lattime =
 405             ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME, /*bytes*/1);
 406
 407 }
 408
 409 void
 410 ahd_pci_resume(struct ahd_softc *ahd)
 411 {
 412         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
 413                              ahd->suspend_state.pci_state.devconfig, /*bytes*/4);
 414         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 415                              ahd->suspend_state.pci_state.command, /*bytes*/1);
 416         ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
 417                              ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
 418 }
 419 #endif
 420
 421 /*
 422  * Perform some simple tests that should catch situations where
 423  * our registers are invalidly mapped.
 424  */
 425 int
 426 ahd_pci_test_register_access(struct ahd_softc *ahd)
 427 {
 428         uint32_t cmd;
 429         u_int    targpcistat;
 430         u_int    pci_status1;
 431         int      error;
 432         uint8_t  hcntrl;
 433
 434         error = EIO;
 435
 436         /*
 437          * Enable PCI error interrupt status, but suppress NMIs
 438          * generated by SERR raised due to target aborts.
 439          */
 440         cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
 441         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 442                              cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
 443
 444         /*
 445          * First a simple test to see if any
 446          * registers can be read.  Reading
 447          * HCNTRL has no side effects and has
 448          * at least one bit that is guaranteed to
 449          * be zero so it is a good register to
 450          * use for this test.
 451          */
 452         hcntrl = ahd_inb(ahd, HCNTRL);
 453         if (hcntrl == 0xFF)
 454                 goto fail;
 455
 456         /*
 457          * Next create a situation where write combining
 458          * or read prefetching could be initiated by the
 459          * CPU or host bridge.  Our device does not support
 460          * either, so look for data corruption and/or flaged
 461          * PCI errors.  First pause without causing another
 462          * chip reset.
 463          */
 464         hcntrl &= ~CHIPRST;
 465         ahd_outb(ahd, HCNTRL, hcntrl|PAUSE);
 466         while (ahd_is_paused(ahd) == 0)
 467                 ;
 468
 469         /* Clear any PCI errors that occurred before our driver attached. */
 470         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 471         targpcistat = ahd_inb(ahd, TARGPCISTAT);
 472         ahd_outb(ahd, TARGPCISTAT, targpcistat);
 473         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 474                                           PCIR_STATUS + 1, /*bytes*/1);
 475         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 476                              pci_status1, /*bytes*/1);
 477         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 478         ahd_outb(ahd, CLRINT, CLRPCIINT);
 479
 480         ahd_outb(ahd, SEQCTL0, PERRORDIS);
 481         ahd_outl(ahd, SRAM_BASE, 0x5aa555aa);
 482         if (ahd_inl(ahd, SRAM_BASE) != 0x5aa555aa)
 483                 goto fail;
 484
 485         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 486                 u_int targpcistat;
 487
 488                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 489                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
 490                 if ((targpcistat & STA) != 0)
 491                         goto fail;
 492         }
 493
 494         error = 0;
 495
 496 fail:
 497         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 498
 499                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 500                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
 501
 502                 /* Silently clear any latched errors. */
 503                 ahd_outb(ahd, TARGPCISTAT, targpcistat);
 504                 pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 505                                                   PCIR_STATUS + 1, /*bytes*/1);
 506                 ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 507                                      pci_status1, /*bytes*/1);
 508                 ahd_outb(ahd, CLRINT, CLRPCIINT);
 509         }
 510         ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS);
 511         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
 512         return (error);
 513 }
 514
 515 /*
 516  * Check the external port logic for a serial eeprom
 517  * and termination/cable detection contrls.
 518  */
 519 static int
 520 ahd_check_extport(struct ahd_softc *ahd)
 521 {
 522         struct  vpd_config vpd;
 523         struct  seeprom_config *sc;
 524         u_int   adapter_control;
 525         int     have_seeprom;
 526         int     error;
 527
 528         sc = ahd->seep_config;
 529         have_seeprom = ahd_acquire_seeprom(ahd);
 530         if (have_seeprom) {
 531                 u_int start_addr;
 532
 533                 /*
 534                  * Fetch VPD for this function and parse it.
 535                  */
 536                 if (bootverbose)
 537                         printf("%s: Reading VPD from SEEPROM...",
 538                                ahd_name(ahd));
 539
 540                 /* Address is always in units of 16bit words */
 541                 start_addr = ((2 * sizeof(*sc))
 542                             + (sizeof(vpd) * (ahd->channel - 'A'))) / 2;
 543
 544                 error = ahd_read_seeprom(ahd, (uint16_t *)&vpd,
 545                                          start_addr, sizeof(vpd)/2,
 546                                          /*bytestream*/TRUE);
 547                 if (error == 0)
 548                         error = ahd_parse_vpddata(ahd, &vpd);
 549                 if (bootverbose)
 550                         printf("%s: VPD parsing %s\n",
 551                                ahd_name(ahd),
 552                                error == 0 ? "successful" : "failed");
 553
 554                 if (bootverbose)
 555                         printf("%s: Reading SEEPROM...", ahd_name(ahd));
 556
 557                 /* Address is always in units of 16bit words */
 558                 start_addr = (sizeof(*sc) / 2) * (ahd->channel - 'A');
 559
 560                 error = ahd_read_seeprom(ahd, (uint16_t *)sc,
 561                                          start_addr, sizeof(*sc)/2,
 562                                          /*bytestream*/FALSE);
 563
 564                 if (error != 0) {
 565                         printf("Unable to read SEEPROM\n");
 566                         have_seeprom = 0;
 567                 } else {
 568                         have_seeprom = ahd_verify_cksum(sc);
 569
 570                         if (bootverbose) {
 571                                 if (have_seeprom == 0)
 572                                         printf ("checksum error\n");
 573                                 else
 574                                         printf ("done.\n");
 575                         }
 576                 }
 577                 ahd_release_seeprom(ahd);
 578         }
 579
 580         if (!have_seeprom) {
 581                 u_int     nvram_scb;
 582
 583                 /*
 584                  * Pull scratch ram settings and treat them as
 585                  * if they are the contents of an seeprom if
 586                  * the 'ADPT', 'BIOS', or 'ASPI' signature is found
 587                  * in SCB 0xFF.  We manually compose the data as 16bit
 588                  * values to avoid endian issues.
 589                  */
 590                 ahd_set_scbptr(ahd, 0xFF);
 591                 nvram_scb = ahd_inb_scbram(ahd, SCB_BASE + NVRAM_SCB_OFFSET);
 592                 if (nvram_scb != 0xFF
 593                  && ((ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 594                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'D'
 595                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 596                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'T')
 597                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'B'
 598                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'I'
 599                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'O'
 600                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'S')
 601                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 602                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'S'
 603                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 604                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'I'))) {
 605                         uint16_t *sc_data;
 606                         int       i;
 607
 608                         ahd_set_scbptr(ahd, nvram_scb);
 609                         sc_data = (uint16_t *)sc;
 610                         for (i = 0; i < 64; i += 2)
 611                                 *sc_data++ = ahd_inw_scbram(ahd, SCB_BASE+i);
 612                         have_seeprom = ahd_verify_cksum(sc);
 613                         if (have_seeprom)
 614                                 ahd->flags |= AHD_SCB_CONFIG_USED;
 615                 }
 616         }
 617
 618 #ifdef AHD_DEBUG
 619         if (have_seeprom != 0
 620          && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
 621                 uint16_t *sc_data;
 622                 int       i;
 623
 624                 printf("%s: Seeprom Contents:", ahd_name(ahd));
 625                 sc_data = (uint16_t *)sc;
 626                 for (i = 0; i < (sizeof(*sc)); i += 2)
 627                         printf("\n\t0x%.4x", sc_data[i]);
 628                 printf("\n");
 629         }
 630 #endif
 631
 632         if (!have_seeprom) {
 633                 if (bootverbose)
 634                         printf("%s: No SEEPROM available.\n", ahd_name(ahd));
 635                 ahd->flags |= AHD_USEDEFAULTS;
 636                 error = ahd_default_config(ahd);
 637                 adapter_control = CFAUTOTERM|CFSEAUTOTERM;
 638                 free(ahd->seep_config, M_DEVBUF);
 639                 ahd->seep_config = NULL;
 640         } else {
 641                 error = ahd_parse_cfgdata(ahd, sc);
 642                 adapter_control = sc->adapter_control;
 643         }
 644         if (error != 0)
 645                 return (error);
 646
 647         ahd_configure_termination(ahd, adapter_control);
 648
 649         return (0);
 650 }
 651
 652 static void
 653 ahd_configure_termination(struct ahd_softc *ahd, u_int adapter_control)
 654 {
 655         int      error;
 656         u_int    sxfrctl1;
 657         uint8_t  termctl;
 658         uint32_t devconfig;
 659
 660         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 661         devconfig &= ~STPWLEVEL;
 662         if ((ahd->flags & AHD_STPWLEVEL_A) != 0)
 663                 devconfig |= STPWLEVEL;
 664         if (bootverbose)
 665                 printf("%s: STPWLEVEL is %s\n",
 666                        ahd_name(ahd), (devconfig & STPWLEVEL) ? "on" : "off");
 667         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
 668
 669         /* Make sure current sensing is off. */
 670         if ((ahd->flags & AHD_CURRENT_SENSING) != 0) {
 671                 (void)ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
 672         }
 673
 674         /*
 675          * Read to sense.  Write to set.
 676          */
 677         error = ahd_read_flexport(ahd, FLXADDR_TERMCTL, &termctl);
 678         if ((adapter_control & CFAUTOTERM) == 0) {
 679                 if (bootverbose)
 680                         printf("%s: Manual Primary Termination\n",
 681                                ahd_name(ahd));
 682                 termctl &= ~(FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH);
 683                 if ((adapter_control & CFSTERM) != 0)
 684                         termctl |= FLX_TERMCTL_ENPRILOW;
 685                 if ((adapter_control & CFWSTERM) != 0)
 686                         termctl |= FLX_TERMCTL_ENPRIHIGH;
 687         } else if (error != 0) {
 688                 printf("%s: Primary Auto-Term Sensing failed! "
 689                        "Using Defaults.\n", ahd_name(ahd));
 690                 termctl = FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH;
 691         }
 692
 693         if ((adapter_control & CFSEAUTOTERM) == 0) {
 694                 if (bootverbose)
 695                         printf("%s: Manual Secondary Termination\n",
 696                                ahd_name(ahd));
 697                 termctl &= ~(FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH);
 698                 if ((adapter_control & CFSELOWTERM) != 0)
 699                         termctl |= FLX_TERMCTL_ENSECLOW;
 700                 if ((adapter_control & CFSEHIGHTERM) != 0)
 701                         termctl |= FLX_TERMCTL_ENSECHIGH;
 702         } else if (error != 0) {
 703                 printf("%s: Secondary Auto-Term Sensing failed! "
 704                        "Using Defaults.\n", ahd_name(ahd));
 705                 termctl |= FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH;
 706         }
 707
 708         /*
 709          * Now set the termination based on what we found.
 710          */
 711         sxfrctl1 = ahd_inb(ahd, SXFRCTL1) & ~STPWEN;
 712         ahd->flags &= ~AHD_TERM_ENB_A;
 713         if ((termctl & FLX_TERMCTL_ENPRILOW) != 0) {
 714                 ahd->flags |= AHD_TERM_ENB_A;
 715                 sxfrctl1 |= STPWEN;
 716         }
 717         /* Must set the latch once in order to be effective. */
 718         ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
 719         ahd_outb(ahd, SXFRCTL1, sxfrctl1);
 720
 721         error = ahd_write_flexport(ahd, FLXADDR_TERMCTL, termctl);
 722         if (error != 0) {
 723                 printf("%s: Unable to set termination settings!\n",
 724                        ahd_name(ahd));
 725         } else if (bootverbose) {
 726                 printf("%s: Primary High byte termination %sabled\n",
 727                        ahd_name(ahd),
 728                        (termctl & FLX_TERMCTL_ENPRIHIGH) ? "En" : "Dis");
 729
 730                 printf("%s: Primary Low byte termination %sabled\n",
 731                        ahd_name(ahd),
 732                        (termctl & FLX_TERMCTL_ENPRILOW) ? "En" : "Dis");
 733
 734                 printf("%s: Secondary High byte termination %sabled\n",
 735                        ahd_name(ahd),
 736                        (termctl & FLX_TERMCTL_ENSECHIGH) ? "En" : "Dis");
 737
 738                 printf("%s: Secondary Low byte termination %sabled\n",
 739                        ahd_name(ahd),
 740                        (termctl & FLX_TERMCTL_ENSECLOW) ? "En" : "Dis");
 741         }
 742         return;
 743 }
 744
 745 #define DPE     0x80
 746 #define SSE     0x40
 747 #define RMA     0x20
 748 #define RTA     0x10
 749 #define STA     0x08
 750 #define DPR     0x01
 751
 752 static const char *split_status_source[] =
 753 {
 754         "DFF0",
 755         "DFF1",
 756         "OVLY",
 757         "CMC",
 758 };
 759
 760 static const char *pci_status_source[] =
 761 {
 762         "DFF0",
 763         "DFF1",
 764         "SG",
 765         "CMC",
 766         "OVLY",
 767         "NONE",
 768         "MSI",
 769         "TARG"
 770 };
 771
 772 static const char *split_status_strings[] =
 773 {
 774         "%s: Received split response in %s.\n",
 775         "%s: Received split completion error message in %s\n",
 776         "%s: Receive overrun in %s\n",
 777         "%s: Count not complete in %s\n",
 778         "%s: Split completion data bucket in %s\n",
 779         "%s: Split completion address error in %s\n",
 780         "%s: Split completion byte count error in %s\n",
 781         "%s: Signaled Target-abort to early terminate a split in %s\n"
 782 };
 783
 784 static const char *pci_status_strings[] =
 785 {
 786         "%s: Data Parity Error has been reported via PERR# in %s\n",
 787         "%s: Target initial wait state error in %s\n",
 788         "%s: Split completion read data parity error in %s\n",
 789         "%s: Split completion address attribute parity error in %s\n",
 790         "%s: Received a Target Abort in %s\n",
 791         "%s: Received a Master Abort in %s\n",
 792         "%s: Signal System Error Detected in %s\n",
 793         "%s: Address or Write Phase Parity Error Detected in %s.\n"
 794 };
 795
 796 static void
 797 ahd_pci_intr(struct ahd_softc *ahd)
 798 {
 799         uint8_t         pci_status[8];
 800         ahd_mode_state  saved_modes;
 801         u_int           pci_status1;
 802         u_int           intstat;
 803         u_int           i;
 804         u_int           reg;
 805
 806         intstat = ahd_inb(ahd, INTSTAT);
 807
 808         if ((intstat & SPLTINT) != 0)
 809                 ahd_pci_split_intr(ahd, intstat);
 810
 811         if ((intstat & PCIINT) == 0)
 812                 return;
 813
 814         printf("%s: PCI error Interrupt\n", ahd_name(ahd));
 815         saved_modes = ahd_save_modes(ahd);
 816         ahd_dump_card_state(ahd);
 817         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 818         for (i = 0, reg = DF0PCISTAT; i < 8; i++, reg++) {
 819
 820                 if (i == 5)
 821                         continue;
 822                 pci_status[i] = ahd_inb(ahd, reg);
 823                 /* Clear latched errors.  So our interrupt deasserts. */
 824                 ahd_outb(ahd, reg, pci_status[i]);
 825         }
 826
 827         for (i = 0; i < 8; i++) {
 828                 u_int bit;
 829
 830                 if (i == 5)
 831                         continue;
 832
 833                 for (bit = 0; bit < 8; bit++) {
 834
 835                         if ((pci_status[i] & (0x1 << bit)) != 0) {
 836                                 static const char *s;
 837
 838                                 s = pci_status_strings[bit];
 839                                 if (i == 7/*TARG*/ && bit == 3)
 840                                         s = "%s: Signaled Target Abort\n";
 841                                 printf(s, ahd_name(ahd), pci_status_source[i]);
 842                         }
 843                 }
 844         }
 845         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 846                                           PCIR_STATUS + 1, /*bytes*/1);
 847         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 848                              pci_status1, /*bytes*/1);
 849         ahd_restore_modes(ahd, saved_modes);
 850         ahd_outb(ahd, CLRINT, CLRPCIINT);
 851         ahd_unpause(ahd);
 852 }
 853
 854 static void
 855 ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat)
 856 {
 857         uint8_t         split_status[4];
 858         uint8_t         split_status1[4];
 859         uint8_t         sg_split_status[2];
 860         uint8_t         sg_split_status1[2];
 861         ahd_mode_state  saved_modes;
 862         u_int           i;
 863         uint16_t        pcix_status;
 864
 865         /*
 866          * Check for splits in all modes.  Modes 0 and 1
 867          * additionally have SG engine splits to look at.
 868          */
 869         pcix_status = ahd_pci_read_config(ahd->dev_softc, PCIXR_STATUS,
 870                                           /*bytes*/2);
 871         printf("%s: PCI Split Interrupt - PCI-X status = 0x%x\n",
 872                ahd_name(ahd), pcix_status);
 873         saved_modes = ahd_save_modes(ahd);
 874         for (i = 0; i < 4; i++) {
 875                 ahd_set_modes(ahd, i, i);
 876
 877                 split_status[i] = ahd_inb(ahd, DCHSPLTSTAT0);
 878                 split_status1[i] = ahd_inb(ahd, DCHSPLTSTAT1);
 879                 /* Clear latched errors.  So our interrupt deasserts. */
 880                 ahd_outb(ahd, DCHSPLTSTAT0, split_status[i]);
 881                 ahd_outb(ahd, DCHSPLTSTAT1, split_status1[i]);
 882                 if (i > 1)
 883                         continue;
 884                 sg_split_status[i] = ahd_inb(ahd, SGSPLTSTAT0);
 885                 sg_split_status1[i] = ahd_inb(ahd, SGSPLTSTAT1);
 886                 /* Clear latched errors.  So our interrupt deasserts. */
 887                 ahd_outb(ahd, SGSPLTSTAT0, sg_split_status[i]);
 888                 ahd_outb(ahd, SGSPLTSTAT1, sg_split_status1[i]);
 889         }
 890
 891         for (i = 0; i < 4; i++) {
 892                 u_int bit;
 893
 894                 for (bit = 0; bit < 8; bit++) {
 895
 896                         if ((split_status[i] & (0x1 << bit)) != 0) {
 897                                 static const char *s;
 898
 899                                 s = split_status_strings[bit];
 900                                 printf(s, ahd_name(ahd),
 901                                        split_status_source[i]);
 902                         }
 903
 904                         if (i > 1)
 905                                 continue;
 906
 907                         if ((sg_split_status[i] & (0x1 << bit)) != 0) {
 908                                 static const char *s;
 909
 910                                 s = split_status_strings[bit];
 911                                 printf(s, ahd_name(ahd), "SG");
 912                         }
 913                 }
 914         }
 915         /*
 916          * Clear PCI-X status bits.
 917          */
 918         ahd_pci_write_config(ahd->dev_softc, PCIXR_STATUS,
 919                              pcix_status, /*bytes*/2);
 920         ahd_outb(ahd, CLRINT, CLRSPLTINT);
 921         ahd_restore_modes(ahd, saved_modes);
 922 }
 923
 924 static int
 925 ahd_aic7901_setup(struct ahd_softc *ahd)
 926 {
 927
 928         ahd->chip = AHD_AIC7901;
 929         ahd->features = AHD_AIC7901_FE;
 930         return (ahd_aic790X_setup(ahd));
 931 }
 932
 933 static int
 934 ahd_aic7901A_setup(struct ahd_softc *ahd)
 935 {
 936
 937         ahd->chip = AHD_AIC7901A;
 938         ahd->features = AHD_AIC7901A_FE;
 939         return (ahd_aic790X_setup(ahd));
 940 }
 941
 942 static int
 943 ahd_aic7902_setup(struct ahd_softc *ahd)
 944 {
 945         ahd->chip = AHD_AIC7902;
 946         ahd->features = AHD_AIC7902_FE;
 947         return (ahd_aic790X_setup(ahd));
 948 }
 949
 950 static int
 951 ahd_aic790X_setup(struct ahd_softc *ahd)
 952 {
 953         ahd_dev_softc_t pci;
 954         u_int rev;
 955
 956         pci = ahd->dev_softc;
 957         rev = ahd_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
 958         if (rev < ID_AIC7902_PCI_REV_A4) {
 959                 printf("%s: Unable to attach to unsupported chip revision %d\n",
 960                        ahd_name(ahd), rev);
 961                 ahd_pci_write_config(pci, PCIR_COMMAND, 0, /*bytes*/2);
 962                 return (ENXIO);
 963         }
 964         ahd->channel = ahd_get_pci_function(pci) + 'A';
 965         if (rev < ID_AIC7902_PCI_REV_B0) {
 966                 /*
 967                  * Enable A series workarounds.
 968                  */
 969                 ahd->bugs |= AHD_SENT_SCB_UPDATE_BUG|AHD_ABORT_LQI_BUG
 970                           |  AHD_PKT_BITBUCKET_BUG|AHD_LONG_SETIMO_BUG
 971                           |  AHD_NLQICRC_DELAYED_BUG|AHD_SCSIRST_BUG
 972                           |  AHD_LQO_ATNO_BUG|AHD_AUTOFLUSH_BUG
 973                           |  AHD_CLRLQO_AUTOCLR_BUG|AHD_PCIX_MMAPIO_BUG
 974                           |  AHD_PCIX_CHIPRST_BUG|AHD_PCIX_SCBRAM_RD_BUG
 975                           |  AHD_PKTIZED_STATUS_BUG|AHD_PKT_LUN_BUG
 976                           |  AHD_MDFF_WSCBPTR_BUG|AHD_REG_SLOW_SETTLE_BUG
 977                           |  AHD_SET_MODE_BUG|AHD_BUSFREEREV_BUG
 978                           |  AHD_NONPACKFIFO_BUG|AHD_PACED_NEGTABLE_BUG
 979                           |  AHD_FAINT_LED_BUG;
 980
 981                 /*
 982                  * IO Cell parameter setup.
 983                  */
 984                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
 985
 986                 if ((ahd->flags & AHD_HP_BOARD) == 0)
 987                         AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
 988         } else {
 989                 /* This is revision B and newer. */
 990                 extern uint32_t aic79xx_slowcrc;
 991                 u_int devconfig1;
 992
 993                 ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
 994                               |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY
 995                               |  AHD_BUSFREEREV_BUG;
 996                 ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
 997
 998                 /* If the user requested that the SLOWCRC bit to be set. */
 999                 if (aic79xx_slowcrc)
1000                         ahd->features |= AHD_AIC79XXB_SLOWCRC;
1001
1002                 /*
1003                  * Some issues have been resolved in the 7901B.
1004                  */
1005                 if ((ahd->features & AHD_MULTI_FUNC) != 0)
1006                         ahd->bugs |= AHD_INTCOLLISION_BUG|AHD_ABORT_LQI_BUG;
1007
1008                 /*
1009                  * IO Cell parameter setup.
1010                  */
1011                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
1012                 AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVB);
1013                 AHD_SET_AMPLITUDE(ahd, AHD_AMPLITUDE_DEF);
1014
1015                 /*
1016                  * Set the PREQDIS bit for H2B which disables some workaround
1017                  * that doesn't work on regular PCI busses.
1018                  * XXX - Find out exactly what this does from the hardware
1019                  *       folks!
1020                  */
1021                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1022                 ahd_pci_write_config(pci, DEVCONFIG1,
1023                                      devconfig1|PREQDIS, /*bytes*/1);
1024                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1025         }
1026
1027         return (0);
1028 }