linux/drivers/scsi/aic7xxx/aic79xx_pci.c
<<
>>
Prefs
   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
  54static inline uint64_t
  55ahd_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
  95static ahd_device_setup_t ahd_aic7901_setup;
  96static ahd_device_setup_t ahd_aic7901A_setup;
  97static ahd_device_setup_t ahd_aic7902_setup;
  98static ahd_device_setup_t ahd_aic790X_setup;
  99
 100static 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
 210static 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)
 220static 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
 250static int      ahd_check_extport(struct ahd_softc *ahd);
 251static void     ahd_configure_termination(struct ahd_softc *ahd,
 252                                          u_int adapter_control);
 253static void     ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat);
 254static void     ahd_pci_intr(struct ahd_softc *ahd);
 255
 256const struct ahd_pci_identity *
 257ahd_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
 294int
 295ahd_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                if (bootverbose)
 341                        printk("%s: Enabling 39Bit Addressing\n",
 342                               ahd_name(ahd));
 343                devconfig = ahd_pci_read_config(ahd->dev_softc,
 344                                                DEVCONFIG, /*bytes*/4);
 345                devconfig |= DACEN;
 346                ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
 347                                     devconfig, /*bytes*/4);
 348        }
 349        
 350        /* Ensure busmastering is enabled */
 351        command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
 352        command |= PCIM_CMD_BUSMASTEREN;
 353        ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, /*bytes*/2);
 354
 355        error = ahd_softc_init(ahd);
 356        if (error != 0)
 357                return (error);
 358
 359        ahd->bus_intr = ahd_pci_intr;
 360
 361        error = ahd_reset(ahd, /*reinit*/FALSE);
 362        if (error != 0)
 363                return (ENXIO);
 364
 365        ahd->pci_cachesize =
 366            ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME,
 367                                /*bytes*/1) & CACHESIZE;
 368        ahd->pci_cachesize *= 4;
 369
 370        ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 371        /* See if we have a SEEPROM and perform auto-term */
 372        error = ahd_check_extport(ahd);
 373        if (error != 0)
 374                return (error);
 375
 376        /* Core initialization */
 377        error = ahd_init(ahd);
 378        if (error != 0)
 379                return (error);
 380        ahd->init_level++;
 381
 382        /*
 383         * Allow interrupts now that we are completely setup.
 384         */
 385        return ahd_pci_map_int(ahd);
 386}
 387
 388#ifdef CONFIG_PM
 389void
 390ahd_pci_suspend(struct ahd_softc *ahd)
 391{
 392        /*
 393         * Save chip register configuration data for chip resets
 394         * that occur during runtime and resume events.
 395         */
 396        ahd->suspend_state.pci_state.devconfig =
 397            ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 398        ahd->suspend_state.pci_state.command =
 399            ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
 400        ahd->suspend_state.pci_state.csize_lattime =
 401            ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME, /*bytes*/1);
 402
 403}
 404
 405void
 406ahd_pci_resume(struct ahd_softc *ahd)
 407{
 408        ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
 409                             ahd->suspend_state.pci_state.devconfig, /*bytes*/4);
 410        ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 411                             ahd->suspend_state.pci_state.command, /*bytes*/1);
 412        ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
 413                             ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
 414}
 415#endif
 416
 417/*
 418 * Perform some simple tests that should catch situations where
 419 * our registers are invalidly mapped.
 420 */
 421int
 422ahd_pci_test_register_access(struct ahd_softc *ahd)
 423{
 424        uint32_t cmd;
 425        u_int    targpcistat;
 426        u_int    pci_status1;
 427        int      error;
 428        uint8_t  hcntrl;
 429
 430        error = EIO;
 431
 432        /*
 433         * Enable PCI error interrupt status, but suppress NMIs
 434         * generated by SERR raised due to target aborts.
 435         */
 436        cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
 437        ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 438                             cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
 439
 440        /*
 441         * First a simple test to see if any
 442         * registers can be read.  Reading
 443         * HCNTRL has no side effects and has
 444         * at least one bit that is guaranteed to
 445         * be zero so it is a good register to
 446         * use for this test.
 447         */
 448        hcntrl = ahd_inb(ahd, HCNTRL);
 449        if (hcntrl == 0xFF)
 450                goto fail;
 451
 452        /*
 453         * Next create a situation where write combining
 454         * or read prefetching could be initiated by the
 455         * CPU or host bridge.  Our device does not support
 456         * either, so look for data corruption and/or flaged
 457         * PCI errors.  First pause without causing another
 458         * chip reset.
 459         */
 460        hcntrl &= ~CHIPRST;
 461        ahd_outb(ahd, HCNTRL, hcntrl|PAUSE);
 462        while (ahd_is_paused(ahd) == 0)
 463                ;
 464
 465        /* Clear any PCI errors that occurred before our driver attached. */
 466        ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 467        targpcistat = ahd_inb(ahd, TARGPCISTAT);
 468        ahd_outb(ahd, TARGPCISTAT, targpcistat);
 469        pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 470                                          PCIR_STATUS + 1, /*bytes*/1);
 471        ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 472                             pci_status1, /*bytes*/1);
 473        ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 474        ahd_outb(ahd, CLRINT, CLRPCIINT);
 475
 476        ahd_outb(ahd, SEQCTL0, PERRORDIS);
 477        ahd_outl(ahd, SRAM_BASE, 0x5aa555aa);
 478        if (ahd_inl(ahd, SRAM_BASE) != 0x5aa555aa)
 479                goto fail;
 480
 481        if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 482                ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 483                targpcistat = ahd_inb(ahd, TARGPCISTAT);
 484                if ((targpcistat & STA) != 0)
 485                        goto fail;
 486        }
 487
 488        error = 0;
 489
 490fail:
 491        if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 492
 493                ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 494                targpcistat = ahd_inb(ahd, TARGPCISTAT);
 495
 496                /* Silently clear any latched errors. */
 497                ahd_outb(ahd, TARGPCISTAT, targpcistat);
 498                pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 499                                                  PCIR_STATUS + 1, /*bytes*/1);
 500                ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 501                                     pci_status1, /*bytes*/1);
 502                ahd_outb(ahd, CLRINT, CLRPCIINT);
 503        }
 504        ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS);
 505        ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
 506        return (error);
 507}
 508
 509/*
 510 * Check the external port logic for a serial eeprom
 511 * and termination/cable detection contrls.
 512 */
 513static int
 514ahd_check_extport(struct ahd_softc *ahd)
 515{
 516        struct  vpd_config vpd;
 517        struct  seeprom_config *sc;
 518        u_int   adapter_control;
 519        int     have_seeprom;
 520        int     error;
 521
 522        sc = ahd->seep_config;
 523        have_seeprom = ahd_acquire_seeprom(ahd);
 524        if (have_seeprom) {
 525                u_int start_addr;
 526
 527                /*
 528                 * Fetch VPD for this function and parse it.
 529                 */
 530                if (bootverbose) 
 531                        printk("%s: Reading VPD from SEEPROM...",
 532                               ahd_name(ahd));
 533
 534                /* Address is always in units of 16bit words */
 535                start_addr = ((2 * sizeof(*sc))
 536                            + (sizeof(vpd) * (ahd->channel - 'A'))) / 2;
 537
 538                error = ahd_read_seeprom(ahd, (uint16_t *)&vpd,
 539                                         start_addr, sizeof(vpd)/2,
 540                                         /*bytestream*/TRUE);
 541                if (error == 0)
 542                        error = ahd_parse_vpddata(ahd, &vpd);
 543                if (bootverbose) 
 544                        printk("%s: VPD parsing %s\n",
 545                               ahd_name(ahd),
 546                               error == 0 ? "successful" : "failed");
 547
 548                if (bootverbose) 
 549                        printk("%s: Reading SEEPROM...", ahd_name(ahd));
 550
 551                /* Address is always in units of 16bit words */
 552                start_addr = (sizeof(*sc) / 2) * (ahd->channel - 'A');
 553
 554                error = ahd_read_seeprom(ahd, (uint16_t *)sc,
 555                                         start_addr, sizeof(*sc)/2,
 556                                         /*bytestream*/FALSE);
 557
 558                if (error != 0) {
 559                        printk("Unable to read SEEPROM\n");
 560                        have_seeprom = 0;
 561                } else {
 562                        have_seeprom = ahd_verify_cksum(sc);
 563
 564                        if (bootverbose) {
 565                                if (have_seeprom == 0)
 566                                        printk ("checksum error\n");
 567                                else
 568                                        printk ("done.\n");
 569                        }
 570                }
 571                ahd_release_seeprom(ahd);
 572        }
 573
 574        if (!have_seeprom) {
 575                u_int     nvram_scb;
 576
 577                /*
 578                 * Pull scratch ram settings and treat them as
 579                 * if they are the contents of an seeprom if
 580                 * the 'ADPT', 'BIOS', or 'ASPI' signature is found
 581                 * in SCB 0xFF.  We manually compose the data as 16bit
 582                 * values to avoid endian issues.
 583                 */
 584                ahd_set_scbptr(ahd, 0xFF);
 585                nvram_scb = ahd_inb_scbram(ahd, SCB_BASE + NVRAM_SCB_OFFSET);
 586                if (nvram_scb != 0xFF
 587                 && ((ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 588                   && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'D'
 589                   && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 590                   && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'T')
 591                  || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'B'
 592                   && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'I'
 593                   && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'O'
 594                   && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'S')
 595                  || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 596                   && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'S'
 597                   && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 598                   && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'I'))) {
 599                        uint16_t *sc_data;
 600                        int       i;
 601
 602                        ahd_set_scbptr(ahd, nvram_scb);
 603                        sc_data = (uint16_t *)sc;
 604                        for (i = 0; i < 64; i += 2)
 605                                *sc_data++ = ahd_inw_scbram(ahd, SCB_BASE+i);
 606                        have_seeprom = ahd_verify_cksum(sc);
 607                        if (have_seeprom)
 608                                ahd->flags |= AHD_SCB_CONFIG_USED;
 609                }
 610        }
 611
 612#ifdef AHD_DEBUG
 613        if (have_seeprom != 0
 614         && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
 615                uint16_t *sc_data;
 616                int       i;
 617
 618                printk("%s: Seeprom Contents:", ahd_name(ahd));
 619                sc_data = (uint16_t *)sc;
 620                for (i = 0; i < (sizeof(*sc)); i += 2)
 621                        printk("\n\t0x%.4x", sc_data[i]);
 622                printk("\n");
 623        }
 624#endif
 625
 626        if (!have_seeprom) {
 627                if (bootverbose)
 628                        printk("%s: No SEEPROM available.\n", ahd_name(ahd));
 629                ahd->flags |= AHD_USEDEFAULTS;
 630                error = ahd_default_config(ahd);
 631                adapter_control = CFAUTOTERM|CFSEAUTOTERM;
 632                kfree(ahd->seep_config);
 633                ahd->seep_config = NULL;
 634        } else {
 635                error = ahd_parse_cfgdata(ahd, sc);
 636                adapter_control = sc->adapter_control;
 637        }
 638        if (error != 0)
 639                return (error);
 640
 641        ahd_configure_termination(ahd, adapter_control);
 642
 643        return (0);
 644}
 645
 646static void
 647ahd_configure_termination(struct ahd_softc *ahd, u_int adapter_control)
 648{
 649        int      error;
 650        u_int    sxfrctl1;
 651        uint8_t  termctl;
 652        uint32_t devconfig;
 653
 654        devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 655        devconfig &= ~STPWLEVEL;
 656        if ((ahd->flags & AHD_STPWLEVEL_A) != 0)
 657                devconfig |= STPWLEVEL;
 658        if (bootverbose)
 659                printk("%s: STPWLEVEL is %s\n",
 660                       ahd_name(ahd), (devconfig & STPWLEVEL) ? "on" : "off");
 661        ahd_pci_write_config(ahd->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
 662 
 663        /* Make sure current sensing is off. */
 664        if ((ahd->flags & AHD_CURRENT_SENSING) != 0) {
 665                (void)ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
 666        }
 667
 668        /*
 669         * Read to sense.  Write to set.
 670         */
 671        error = ahd_read_flexport(ahd, FLXADDR_TERMCTL, &termctl);
 672        if ((adapter_control & CFAUTOTERM) == 0) {
 673                if (bootverbose)
 674                        printk("%s: Manual Primary Termination\n",
 675                               ahd_name(ahd));
 676                termctl &= ~(FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH);
 677                if ((adapter_control & CFSTERM) != 0)
 678                        termctl |= FLX_TERMCTL_ENPRILOW;
 679                if ((adapter_control & CFWSTERM) != 0)
 680                        termctl |= FLX_TERMCTL_ENPRIHIGH;
 681        } else if (error != 0) {
 682                printk("%s: Primary Auto-Term Sensing failed! "
 683                       "Using Defaults.\n", ahd_name(ahd));
 684                termctl = FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH;
 685        }
 686
 687        if ((adapter_control & CFSEAUTOTERM) == 0) {
 688                if (bootverbose)
 689                        printk("%s: Manual Secondary Termination\n",
 690                               ahd_name(ahd));
 691                termctl &= ~(FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH);
 692                if ((adapter_control & CFSELOWTERM) != 0)
 693                        termctl |= FLX_TERMCTL_ENSECLOW;
 694                if ((adapter_control & CFSEHIGHTERM) != 0)
 695                        termctl |= FLX_TERMCTL_ENSECHIGH;
 696        } else if (error != 0) {
 697                printk("%s: Secondary Auto-Term Sensing failed! "
 698                       "Using Defaults.\n", ahd_name(ahd));
 699                termctl |= FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH;
 700        }
 701
 702        /*
 703         * Now set the termination based on what we found.
 704         */
 705        sxfrctl1 = ahd_inb(ahd, SXFRCTL1) & ~STPWEN;
 706        ahd->flags &= ~AHD_TERM_ENB_A;
 707        if ((termctl & FLX_TERMCTL_ENPRILOW) != 0) {
 708                ahd->flags |= AHD_TERM_ENB_A;
 709                sxfrctl1 |= STPWEN;
 710        }
 711        /* Must set the latch once in order to be effective. */
 712        ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
 713        ahd_outb(ahd, SXFRCTL1, sxfrctl1);
 714
 715        error = ahd_write_flexport(ahd, FLXADDR_TERMCTL, termctl);
 716        if (error != 0) {
 717                printk("%s: Unable to set termination settings!\n",
 718                       ahd_name(ahd));
 719        } else if (bootverbose) {
 720                printk("%s: Primary High byte termination %sabled\n",
 721                       ahd_name(ahd),
 722                       (termctl & FLX_TERMCTL_ENPRIHIGH) ? "En" : "Dis");
 723
 724                printk("%s: Primary Low byte termination %sabled\n",
 725                       ahd_name(ahd),
 726                       (termctl & FLX_TERMCTL_ENPRILOW) ? "En" : "Dis");
 727
 728                printk("%s: Secondary High byte termination %sabled\n",
 729                       ahd_name(ahd),
 730                       (termctl & FLX_TERMCTL_ENSECHIGH) ? "En" : "Dis");
 731
 732                printk("%s: Secondary Low byte termination %sabled\n",
 733                       ahd_name(ahd),
 734                       (termctl & FLX_TERMCTL_ENSECLOW) ? "En" : "Dis");
 735        }
 736        return;
 737}
 738
 739#define DPE     0x80
 740#define SSE     0x40
 741#define RMA     0x20
 742#define RTA     0x10
 743#define STA     0x08
 744#define DPR     0x01
 745
 746static const char *split_status_source[] =
 747{
 748        "DFF0",
 749        "DFF1",
 750        "OVLY",
 751        "CMC",
 752};
 753
 754static const char *pci_status_source[] =
 755{
 756        "DFF0",
 757        "DFF1",
 758        "SG",
 759        "CMC",
 760        "OVLY",
 761        "NONE",
 762        "MSI",
 763        "TARG"
 764};
 765
 766static const char *split_status_strings[] =
 767{
 768        "%s: Received split response in %s.\n",
 769        "%s: Received split completion error message in %s\n",
 770        "%s: Receive overrun in %s\n",
 771        "%s: Count not complete in %s\n",
 772        "%s: Split completion data bucket in %s\n",
 773        "%s: Split completion address error in %s\n",
 774        "%s: Split completion byte count error in %s\n",
 775        "%s: Signaled Target-abort to early terminate a split in %s\n"
 776};
 777
 778static const char *pci_status_strings[] =
 779{
 780        "%s: Data Parity Error has been reported via PERR# in %s\n",
 781        "%s: Target initial wait state error in %s\n",
 782        "%s: Split completion read data parity error in %s\n",
 783        "%s: Split completion address attribute parity error in %s\n",
 784        "%s: Received a Target Abort in %s\n",
 785        "%s: Received a Master Abort in %s\n",
 786        "%s: Signal System Error Detected in %s\n",
 787        "%s: Address or Write Phase Parity Error Detected in %s.\n"
 788};
 789
 790static void
 791ahd_pci_intr(struct ahd_softc *ahd)
 792{
 793        uint8_t         pci_status[8];
 794        ahd_mode_state  saved_modes;
 795        u_int           pci_status1;
 796        u_int           intstat;
 797        u_int           i;
 798        u_int           reg;
 799        
 800        intstat = ahd_inb(ahd, INTSTAT);
 801
 802        if ((intstat & SPLTINT) != 0)
 803                ahd_pci_split_intr(ahd, intstat);
 804
 805        if ((intstat & PCIINT) == 0)
 806                return;
 807
 808        printk("%s: PCI error Interrupt\n", ahd_name(ahd));
 809        saved_modes = ahd_save_modes(ahd);
 810        ahd_dump_card_state(ahd);
 811        ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 812        for (i = 0, reg = DF0PCISTAT; i < 8; i++, reg++) {
 813
 814                if (i == 5)
 815                        continue;
 816                pci_status[i] = ahd_inb(ahd, reg);
 817                /* Clear latched errors.  So our interrupt deasserts. */
 818                ahd_outb(ahd, reg, pci_status[i]);
 819        }
 820
 821        for (i = 0; i < 8; i++) {
 822                u_int bit;
 823        
 824                if (i == 5)
 825                        continue;
 826
 827                for (bit = 0; bit < 8; bit++) {
 828
 829                        if ((pci_status[i] & (0x1 << bit)) != 0) {
 830                                static const char *s;
 831
 832                                s = pci_status_strings[bit];
 833                                if (i == 7/*TARG*/ && bit == 3)
 834                                        s = "%s: Signaled Target Abort\n";
 835                                printk(s, ahd_name(ahd), pci_status_source[i]);
 836                        }
 837                }       
 838        }
 839        pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 840                                          PCIR_STATUS + 1, /*bytes*/1);
 841        ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 842                             pci_status1, /*bytes*/1);
 843        ahd_restore_modes(ahd, saved_modes);
 844        ahd_outb(ahd, CLRINT, CLRPCIINT);
 845        ahd_unpause(ahd);
 846}
 847
 848static void
 849ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat)
 850{
 851        uint8_t         split_status[4];
 852        uint8_t         split_status1[4];
 853        uint8_t         sg_split_status[2];
 854        uint8_t         sg_split_status1[2];
 855        ahd_mode_state  saved_modes;
 856        u_int           i;
 857        uint16_t        pcix_status;
 858
 859        /*
 860         * Check for splits in all modes.  Modes 0 and 1
 861         * additionally have SG engine splits to look at.
 862         */
 863        pcix_status = ahd_pci_read_config(ahd->dev_softc, PCIXR_STATUS,
 864                                          /*bytes*/2);
 865        printk("%s: PCI Split Interrupt - PCI-X status = 0x%x\n",
 866               ahd_name(ahd), pcix_status);
 867        saved_modes = ahd_save_modes(ahd);
 868        for (i = 0; i < 4; i++) {
 869                ahd_set_modes(ahd, i, i);
 870
 871                split_status[i] = ahd_inb(ahd, DCHSPLTSTAT0);
 872                split_status1[i] = ahd_inb(ahd, DCHSPLTSTAT1);
 873                /* Clear latched errors.  So our interrupt deasserts. */
 874                ahd_outb(ahd, DCHSPLTSTAT0, split_status[i]);
 875                ahd_outb(ahd, DCHSPLTSTAT1, split_status1[i]);
 876                if (i > 1)
 877                        continue;
 878                sg_split_status[i] = ahd_inb(ahd, SGSPLTSTAT0);
 879                sg_split_status1[i] = ahd_inb(ahd, SGSPLTSTAT1);
 880                /* Clear latched errors.  So our interrupt deasserts. */
 881                ahd_outb(ahd, SGSPLTSTAT0, sg_split_status[i]);
 882                ahd_outb(ahd, SGSPLTSTAT1, sg_split_status1[i]);
 883        }
 884
 885        for (i = 0; i < 4; i++) {
 886                u_int bit;
 887
 888                for (bit = 0; bit < 8; bit++) {
 889
 890                        if ((split_status[i] & (0x1 << bit)) != 0) {
 891                                static const char *s;
 892
 893                                s = split_status_strings[bit];
 894                                printk(s, ahd_name(ahd),
 895                                       split_status_source[i]);
 896                        }
 897
 898                        if (i > 1)
 899                                continue;
 900
 901                        if ((sg_split_status[i] & (0x1 << bit)) != 0) {
 902                                static const char *s;
 903
 904                                s = split_status_strings[bit];
 905                                printk(s, ahd_name(ahd), "SG");
 906                        }
 907                }
 908        }
 909        /*
 910         * Clear PCI-X status bits.
 911         */
 912        ahd_pci_write_config(ahd->dev_softc, PCIXR_STATUS,
 913                             pcix_status, /*bytes*/2);
 914        ahd_outb(ahd, CLRINT, CLRSPLTINT);
 915        ahd_restore_modes(ahd, saved_modes);
 916}
 917
 918static int
 919ahd_aic7901_setup(struct ahd_softc *ahd)
 920{
 921
 922        ahd->chip = AHD_AIC7901;
 923        ahd->features = AHD_AIC7901_FE;
 924        return (ahd_aic790X_setup(ahd));
 925}
 926
 927static int
 928ahd_aic7901A_setup(struct ahd_softc *ahd)
 929{
 930
 931        ahd->chip = AHD_AIC7901A;
 932        ahd->features = AHD_AIC7901A_FE;
 933        return (ahd_aic790X_setup(ahd));
 934}
 935
 936static int
 937ahd_aic7902_setup(struct ahd_softc *ahd)
 938{
 939        ahd->chip = AHD_AIC7902;
 940        ahd->features = AHD_AIC7902_FE;
 941        return (ahd_aic790X_setup(ahd));
 942}
 943
 944static int
 945ahd_aic790X_setup(struct ahd_softc *ahd)
 946{
 947        ahd_dev_softc_t pci;
 948        u_int rev;
 949
 950        pci = ahd->dev_softc;
 951        rev = ahd_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
 952        if (rev < ID_AIC7902_PCI_REV_A4) {
 953                printk("%s: Unable to attach to unsupported chip revision %d\n",
 954                       ahd_name(ahd), rev);
 955                ahd_pci_write_config(pci, PCIR_COMMAND, 0, /*bytes*/2);
 956                return (ENXIO);
 957        }
 958        ahd->channel = ahd_get_pci_function(pci) + 'A';
 959        if (rev < ID_AIC7902_PCI_REV_B0) {
 960                /*
 961                 * Enable A series workarounds.
 962                 */
 963                ahd->bugs |= AHD_SENT_SCB_UPDATE_BUG|AHD_ABORT_LQI_BUG
 964                          |  AHD_PKT_BITBUCKET_BUG|AHD_LONG_SETIMO_BUG
 965                          |  AHD_NLQICRC_DELAYED_BUG|AHD_SCSIRST_BUG
 966                          |  AHD_LQO_ATNO_BUG|AHD_AUTOFLUSH_BUG
 967                          |  AHD_CLRLQO_AUTOCLR_BUG|AHD_PCIX_MMAPIO_BUG
 968                          |  AHD_PCIX_CHIPRST_BUG|AHD_PCIX_SCBRAM_RD_BUG
 969                          |  AHD_PKTIZED_STATUS_BUG|AHD_PKT_LUN_BUG
 970                          |  AHD_MDFF_WSCBPTR_BUG|AHD_REG_SLOW_SETTLE_BUG
 971                          |  AHD_SET_MODE_BUG|AHD_BUSFREEREV_BUG
 972                          |  AHD_NONPACKFIFO_BUG|AHD_PACED_NEGTABLE_BUG
 973                          |  AHD_FAINT_LED_BUG;
 974
 975                /*
 976                 * IO Cell parameter setup.
 977                 */
 978                AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
 979
 980                if ((ahd->flags & AHD_HP_BOARD) == 0)
 981                        AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
 982        } else {
 983                /* This is revision B and newer. */
 984                extern uint32_t aic79xx_slowcrc;
 985                u_int devconfig1;
 986
 987                ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
 988                              |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY
 989                              |  AHD_BUSFREEREV_BUG;
 990                ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
 991
 992                /* If the user requested that the SLOWCRC bit to be set. */
 993                if (aic79xx_slowcrc)
 994                        ahd->features |= AHD_AIC79XXB_SLOWCRC;
 995
 996                /*
 997                 * Some issues have been resolved in the 7901B.
 998                 */
 999                if ((ahd->features & AHD_MULTI_FUNC) != 0)
1000                        ahd->bugs |= AHD_INTCOLLISION_BUG|AHD_ABORT_LQI_BUG;
1001
1002                /*
1003                 * IO Cell parameter setup.
1004                 */
1005                AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
1006                AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVB);
1007                AHD_SET_AMPLITUDE(ahd, AHD_AMPLITUDE_DEF);
1008
1009                /*
1010                 * Set the PREQDIS bit for H2B which disables some workaround
1011                 * that doesn't work on regular PCI busses.
1012                 * XXX - Find out exactly what this does from the hardware
1013                 *       folks!
1014                 */
1015                devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1016                ahd_pci_write_config(pci, DEVCONFIG1,
1017                                     devconfig1|PREQDIS, /*bytes*/1);
1018                devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
1019        }
1020
1021        return (0);
1022}
1023