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   1 /* pci_sabre.c: Sabre specific PCI controller support.
   2  *
   3  * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
   4  * Copyright (C) 1998, 1999 Eddie C. Dost   (ecd@skynet.be)
   5  * Copyright (C) 1999 Jakub Jelinek   (jakub@redhat.com)
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/types.h>
  10 #include <linux/pci.h>
  11 #include <linux/init.h>
  12 #include <linux/slab.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/of_device.h>
  15
  16 #include <asm/apb.h>
  17 #include <asm/iommu.h>
  18 #include <asm/irq.h>
  19 #include <asm/prom.h>
  20 #include <asm/upa.h>
  21
  22 #include "pci_impl.h"
  23 #include "iommu_common.h"
  24 #include "psycho_common.h"
  25
  26 #define DRIVER_NAME     "sabre"
  27 #define PFX             DRIVER_NAME ": "
  28
  29 /* SABRE PCI controller register offsets and definitions. */
  30 #define SABRE_UE_AFSR           0x0030UL
  31 #define  SABRE_UEAFSR_PDRD       0x4000000000000000UL   /* Primary PCI DMA Read */
  32 #define  SABRE_UEAFSR_PDWR       0x2000000000000000UL   /* Primary PCI DMA Write */
  33 #define  SABRE_UEAFSR_SDRD       0x0800000000000000UL   /* Secondary PCI DMA Read */
  34 #define  SABRE_UEAFSR_SDWR       0x0400000000000000UL   /* Secondary PCI DMA Write */
  35 #define  SABRE_UEAFSR_SDTE       0x0200000000000000UL   /* Secondary DMA Translation Error */
  36 #define  SABRE_UEAFSR_PDTE       0x0100000000000000UL   /* Primary DMA Translation Error */
  37 #define  SABRE_UEAFSR_BMSK       0x0000ffff00000000UL   /* Bytemask */
  38 #define  SABRE_UEAFSR_OFF        0x00000000e0000000UL   /* Offset (AFAR bits [5:3] */
  39 #define  SABRE_UEAFSR_BLK        0x0000000000800000UL   /* Was block operation */
  40 #define SABRE_UECE_AFAR         0x0038UL
  41 #define SABRE_CE_AFSR           0x0040UL
  42 #define  SABRE_CEAFSR_PDRD       0x4000000000000000UL   /* Primary PCI DMA Read */
  43 #define  SABRE_CEAFSR_PDWR       0x2000000000000000UL   /* Primary PCI DMA Write */
  44 #define  SABRE_CEAFSR_SDRD       0x0800000000000000UL   /* Secondary PCI DMA Read */
  45 #define  SABRE_CEAFSR_SDWR       0x0400000000000000UL   /* Secondary PCI DMA Write */
  46 #define  SABRE_CEAFSR_ESYND      0x00ff000000000000UL   /* ECC Syndrome */
  47 #define  SABRE_CEAFSR_BMSK       0x0000ffff00000000UL   /* Bytemask */
  48 #define  SABRE_CEAFSR_OFF        0x00000000e0000000UL   /* Offset */
  49 #define  SABRE_CEAFSR_BLK        0x0000000000800000UL   /* Was block operation */
  50 #define SABRE_UECE_AFAR_ALIAS   0x0048UL        /* Aliases to 0x0038 */
  51 #define SABRE_IOMMU_CONTROL     0x0200UL
  52 #define  SABRE_IOMMUCTRL_ERRSTS  0x0000000006000000UL   /* Error status bits */
  53 #define  SABRE_IOMMUCTRL_ERR     0x0000000001000000UL   /* Error present in IOTLB */
  54 #define  SABRE_IOMMUCTRL_LCKEN   0x0000000000800000UL   /* IOTLB lock enable */
  55 #define  SABRE_IOMMUCTRL_LCKPTR  0x0000000000780000UL   /* IOTLB lock pointer */
  56 #define  SABRE_IOMMUCTRL_TSBSZ   0x0000000000070000UL   /* TSB Size */
  57 #define  SABRE_IOMMU_TSBSZ_1K   0x0000000000000000
  58 #define  SABRE_IOMMU_TSBSZ_2K   0x0000000000010000
  59 #define  SABRE_IOMMU_TSBSZ_4K   0x0000000000020000
  60 #define  SABRE_IOMMU_TSBSZ_8K   0x0000000000030000
  61 #define  SABRE_IOMMU_TSBSZ_16K  0x0000000000040000
  62 #define  SABRE_IOMMU_TSBSZ_32K  0x0000000000050000
  63 #define  SABRE_IOMMU_TSBSZ_64K  0x0000000000060000
  64 #define  SABRE_IOMMU_TSBSZ_128K 0x0000000000070000
  65 #define  SABRE_IOMMUCTRL_TBWSZ   0x0000000000000004UL   /* TSB assumed page size */
  66 #define  SABRE_IOMMUCTRL_DENAB   0x0000000000000002UL   /* Diagnostic Mode Enable */
  67 #define  SABRE_IOMMUCTRL_ENAB    0x0000000000000001UL   /* IOMMU Enable */
  68 #define SABRE_IOMMU_TSBBASE     0x0208UL
  69 #define SABRE_IOMMU_FLUSH       0x0210UL
  70 #define SABRE_IMAP_A_SLOT0      0x0c00UL
  71 #define SABRE_IMAP_B_SLOT0      0x0c20UL
  72 #define SABRE_IMAP_SCSI         0x1000UL
  73 #define SABRE_IMAP_ETH          0x1008UL
  74 #define SABRE_IMAP_BPP          0x1010UL
  75 #define SABRE_IMAP_AU_REC       0x1018UL
  76 #define SABRE_IMAP_AU_PLAY      0x1020UL
  77 #define SABRE_IMAP_PFAIL        0x1028UL
  78 #define SABRE_IMAP_KMS          0x1030UL
  79 #define SABRE_IMAP_FLPY         0x1038UL
  80 #define SABRE_IMAP_SHW          0x1040UL
  81 #define SABRE_IMAP_KBD          0x1048UL
  82 #define SABRE_IMAP_MS           0x1050UL
  83 #define SABRE_IMAP_SER          0x1058UL
  84 #define SABRE_IMAP_UE           0x1070UL
  85 #define SABRE_IMAP_CE           0x1078UL
  86 #define SABRE_IMAP_PCIERR       0x1080UL
  87 #define SABRE_IMAP_GFX          0x1098UL
  88 #define SABRE_IMAP_EUPA         0x10a0UL
  89 #define SABRE_ICLR_A_SLOT0      0x1400UL
  90 #define SABRE_ICLR_B_SLOT0      0x1480UL
  91 #define SABRE_ICLR_SCSI         0x1800UL
  92 #define SABRE_ICLR_ETH          0x1808UL
  93 #define SABRE_ICLR_BPP          0x1810UL
  94 #define SABRE_ICLR_AU_REC       0x1818UL
  95 #define SABRE_ICLR_AU_PLAY      0x1820UL
  96 #define SABRE_ICLR_PFAIL        0x1828UL
  97 #define SABRE_ICLR_KMS          0x1830UL
  98 #define SABRE_ICLR_FLPY         0x1838UL
  99 #define SABRE_ICLR_SHW          0x1840UL
 100 #define SABRE_ICLR_KBD          0x1848UL
 101 #define SABRE_ICLR_MS           0x1850UL
 102 #define SABRE_ICLR_SER          0x1858UL
 103 #define SABRE_ICLR_UE           0x1870UL
 104 #define SABRE_ICLR_CE           0x1878UL
 105 #define SABRE_ICLR_PCIERR       0x1880UL
 106 #define SABRE_WRSYNC            0x1c20UL
 107 #define SABRE_PCICTRL           0x2000UL
 108 #define  SABRE_PCICTRL_MRLEN     0x0000001000000000UL   /* Use MemoryReadLine for block loads/stores */
 109 #define  SABRE_PCICTRL_SERR      0x0000000400000000UL   /* Set when SERR asserted on PCI bus */
 110 #define  SABRE_PCICTRL_ARBPARK   0x0000000000200000UL   /* Bus Parking 0=Ultra-IIi 1=prev-bus-owner */
 111 #define  SABRE_PCICTRL_CPUPRIO   0x0000000000100000UL   /* Ultra-IIi granted every other bus cycle */
 112 #define  SABRE_PCICTRL_ARBPRIO   0x00000000000f0000UL   /* Slot which is granted every other bus cycle */
 113 #define  SABRE_PCICTRL_ERREN     0x0000000000000100UL   /* PCI Error Interrupt Enable */
 114 #define  SABRE_PCICTRL_RTRYWE    0x0000000000000080UL   /* DMA Flow Control 0=wait-if-possible 1=retry */
 115 #define  SABRE_PCICTRL_AEN       0x000000000000000fUL   /* Slot PCI arbitration enables */
 116 #define SABRE_PIOAFSR           0x2010UL
 117 #define  SABRE_PIOAFSR_PMA       0x8000000000000000UL   /* Primary Master Abort */
 118 #define  SABRE_PIOAFSR_PTA       0x4000000000000000UL   /* Primary Target Abort */
 119 #define  SABRE_PIOAFSR_PRTRY     0x2000000000000000UL   /* Primary Excessive Retries */
 120 #define  SABRE_PIOAFSR_PPERR     0x1000000000000000UL   /* Primary Parity Error */
 121 #define  SABRE_PIOAFSR_SMA       0x0800000000000000UL   /* Secondary Master Abort */
 122 #define  SABRE_PIOAFSR_STA       0x0400000000000000UL   /* Secondary Target Abort */
 123 #define  SABRE_PIOAFSR_SRTRY     0x0200000000000000UL   /* Secondary Excessive Retries */
 124 #define  SABRE_PIOAFSR_SPERR     0x0100000000000000UL   /* Secondary Parity Error */
 125 #define  SABRE_PIOAFSR_BMSK      0x0000ffff00000000UL   /* Byte Mask */
 126 #define  SABRE_PIOAFSR_BLK       0x0000000080000000UL   /* Was Block Operation */
 127 #define SABRE_PIOAFAR           0x2018UL
 128 #define SABRE_PCIDIAG           0x2020UL
 129 #define  SABRE_PCIDIAG_DRTRY     0x0000000000000040UL   /* Disable PIO Retry Limit */
 130 #define  SABRE_PCIDIAG_IPAPAR    0x0000000000000008UL   /* Invert PIO Address Parity */
 131 #define  SABRE_PCIDIAG_IPDPAR    0x0000000000000004UL   /* Invert PIO Data Parity */
 132 #define  SABRE_PCIDIAG_IDDPAR    0x0000000000000002UL   /* Invert DMA Data Parity */
 133 #define  SABRE_PCIDIAG_ELPBK     0x0000000000000001UL   /* Loopback Enable - not supported */
 134 #define SABRE_PCITASR           0x2028UL
 135 #define  SABRE_PCITASR_EF        0x0000000000000080UL   /* Respond to 0xe0000000-0xffffffff */
 136 #define  SABRE_PCITASR_CD        0x0000000000000040UL   /* Respond to 0xc0000000-0xdfffffff */
 137 #define  SABRE_PCITASR_AB        0x0000000000000020UL   /* Respond to 0xa0000000-0xbfffffff */
 138 #define  SABRE_PCITASR_89        0x0000000000000010UL   /* Respond to 0x80000000-0x9fffffff */
 139 #define  SABRE_PCITASR_67        0x0000000000000008UL   /* Respond to 0x60000000-0x7fffffff */
 140 #define  SABRE_PCITASR_45        0x0000000000000004UL   /* Respond to 0x40000000-0x5fffffff */
 141 #define  SABRE_PCITASR_23        0x0000000000000002UL   /* Respond to 0x20000000-0x3fffffff */
 142 #define  SABRE_PCITASR_01        0x0000000000000001UL   /* Respond to 0x00000000-0x1fffffff */
 143 #define SABRE_PIOBUF_DIAG       0x5000UL
 144 #define SABRE_DMABUF_DIAGLO     0x5100UL
 145 #define SABRE_DMABUF_DIAGHI     0x51c0UL
 146 #define SABRE_IMAP_GFX_ALIAS    0x6000UL        /* Aliases to 0x1098 */
 147 #define SABRE_IMAP_EUPA_ALIAS   0x8000UL        /* Aliases to 0x10a0 */
 148 #define SABRE_IOMMU_VADIAG      0xa400UL
 149 #define SABRE_IOMMU_TCDIAG      0xa408UL
 150 #define SABRE_IOMMU_TAG         0xa580UL
 151 #define  SABRE_IOMMUTAG_ERRSTS   0x0000000001800000UL   /* Error status bits */
 152 #define  SABRE_IOMMUTAG_ERR      0x0000000000400000UL   /* Error present */
 153 #define  SABRE_IOMMUTAG_WRITE    0x0000000000200000UL   /* Page is writable */
 154 #define  SABRE_IOMMUTAG_STREAM   0x0000000000100000UL   /* Streamable bit - unused */
 155 #define  SABRE_IOMMUTAG_SIZE     0x0000000000080000UL   /* 0=8k 1=16k */
 156 #define  SABRE_IOMMUTAG_VPN      0x000000000007ffffUL   /* Virtual Page Number [31:13] */
 157 #define SABRE_IOMMU_DATA        0xa600UL
 158 #define SABRE_IOMMUDATA_VALID    0x0000000040000000UL   /* Valid */
 159 #define SABRE_IOMMUDATA_USED     0x0000000020000000UL   /* Used (for LRU algorithm) */
 160 #define SABRE_IOMMUDATA_CACHE    0x0000000010000000UL   /* Cacheable */
 161 #define SABRE_IOMMUDATA_PPN      0x00000000001fffffUL   /* Physical Page Number [33:13] */
 162 #define SABRE_PCI_IRQSTATE      0xa800UL
 163 #define SABRE_OBIO_IRQSTATE     0xa808UL
 164 #define SABRE_FFBCFG            0xf000UL
 165 #define  SABRE_FFBCFG_SPRQS      0x000000000f000000     /* Slave P_RQST queue size */
 166 #define  SABRE_FFBCFG_ONEREAD    0x0000000000004000     /* Slave supports one outstanding read */
 167 #define SABRE_MCCTRL0           0xf010UL
 168 #define  SABRE_MCCTRL0_RENAB     0x0000000080000000     /* Refresh Enable */
 169 #define  SABRE_MCCTRL0_EENAB     0x0000000010000000     /* Enable all ECC functions */
 170 #define  SABRE_MCCTRL0_11BIT     0x0000000000001000     /* Enable 11-bit column addressing */
 171 #define  SABRE_MCCTRL0_DPP       0x0000000000000f00     /* DIMM Pair Present Bits */
 172 #define  SABRE_MCCTRL0_RINTVL    0x00000000000000ff     /* Refresh Interval */
 173 #define SABRE_MCCTRL1           0xf018UL
 174 #define  SABRE_MCCTRL1_AMDC      0x0000000038000000     /* Advance Memdata Clock */
 175 #define  SABRE_MCCTRL1_ARDC      0x0000000007000000     /* Advance DRAM Read Data Clock */
 176 #define  SABRE_MCCTRL1_CSR       0x0000000000e00000     /* CAS to RAS delay for CBR refresh */
 177 #define  SABRE_MCCTRL1_CASRW     0x00000000001c0000     /* CAS length for read/write */
 178 #define  SABRE_MCCTRL1_RCD       0x0000000000038000     /* RAS to CAS delay */
 179 #define  SABRE_MCCTRL1_CP        0x0000000000007000     /* CAS Precharge */
 180 #define  SABRE_MCCTRL1_RP        0x0000000000000e00     /* RAS Precharge */
 181 #define  SABRE_MCCTRL1_RAS       0x00000000000001c0     /* Length of RAS for refresh */
 182 #define  SABRE_MCCTRL1_CASRW2    0x0000000000000038     /* Must be same as CASRW */
 183 #define  SABRE_MCCTRL1_RSC       0x0000000000000007     /* RAS after CAS hold time */
 184 #define SABRE_RESETCTRL         0xf020UL
 185
 186 #define SABRE_CONFIGSPACE       0x001000000UL
 187 #define SABRE_IOSPACE           0x002000000UL
 188 #define SABRE_IOSPACE_SIZE      0x000ffffffUL
 189 #define SABRE_MEMSPACE          0x100000000UL
 190 #define SABRE_MEMSPACE_SIZE     0x07fffffffUL
 191
 192 static int hummingbird_p;
 193 static struct pci_bus *sabre_root_bus;
 194
 195 static irqreturn_t sabre_ue_intr(int irq, void *dev_id)
 196 {
 197         struct pci_pbm_info *pbm = dev_id;
 198         unsigned long afsr_reg = pbm->controller_regs + SABRE_UE_AFSR;
 199         unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
 200         unsigned long afsr, afar, error_bits;
 201         int reported;
 202
 203         /* Latch uncorrectable error status. */
 204         afar = upa_readq(afar_reg);
 205         afsr = upa_readq(afsr_reg);
 206
 207         /* Clear the primary/secondary error status bits. */
 208         error_bits = afsr &
 209                 (SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
 210                  SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
 211                  SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE);
 212         if (!error_bits)
 213                 return IRQ_NONE;
 214         upa_writeq(error_bits, afsr_reg);
 215
 216         /* Log the error. */
 217         printk("%s: Uncorrectable Error, primary error type[%s%s]\n",
 218                pbm->name,
 219                ((error_bits & SABRE_UEAFSR_PDRD) ?
 220                 "DMA Read" :
 221                 ((error_bits & SABRE_UEAFSR_PDWR) ?
 222                  "DMA Write" : "???")),
 223                ((error_bits & SABRE_UEAFSR_PDTE) ?
 224                 ":Translation Error" : ""));
 225         printk("%s: bytemask[%04lx] dword_offset[%lx] was_block(%d)\n",
 226                pbm->name,
 227                (afsr & SABRE_UEAFSR_BMSK) >> 32UL,
 228                (afsr & SABRE_UEAFSR_OFF) >> 29UL,
 229                ((afsr & SABRE_UEAFSR_BLK) ? 1 : 0));
 230         printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
 231         printk("%s: UE Secondary errors [", pbm->name);
 232         reported = 0;
 233         if (afsr & SABRE_UEAFSR_SDRD) {
 234                 reported++;
 235                 printk("(DMA Read)");
 236         }
 237         if (afsr & SABRE_UEAFSR_SDWR) {
 238                 reported++;
 239                 printk("(DMA Write)");
 240         }
 241         if (afsr & SABRE_UEAFSR_SDTE) {
 242                 reported++;
 243                 printk("(Translation Error)");
 244         }
 245         if (!reported)
 246                 printk("(none)");
 247         printk("]\n");
 248
 249         /* Interrogate IOMMU for error status. */
 250         psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
 251
 252         return IRQ_HANDLED;
 253 }
 254
 255 static irqreturn_t sabre_ce_intr(int irq, void *dev_id)
 256 {
 257         struct pci_pbm_info *pbm = dev_id;
 258         unsigned long afsr_reg = pbm->controller_regs + SABRE_CE_AFSR;
 259         unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR;
 260         unsigned long afsr, afar, error_bits;
 261         int reported;
 262
 263         /* Latch error status. */
 264         afar = upa_readq(afar_reg);
 265         afsr = upa_readq(afsr_reg);
 266
 267         /* Clear primary/secondary error status bits. */
 268         error_bits = afsr &
 269                 (SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
 270                  SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR);
 271         if (!error_bits)
 272                 return IRQ_NONE;
 273         upa_writeq(error_bits, afsr_reg);
 274
 275         /* Log the error. */
 276         printk("%s: Correctable Error, primary error type[%s]\n",
 277                pbm->name,
 278                ((error_bits & SABRE_CEAFSR_PDRD) ?
 279                 "DMA Read" :
 280                 ((error_bits & SABRE_CEAFSR_PDWR) ?
 281                  "DMA Write" : "???")));
 282
 283         /* XXX Use syndrome and afar to print out module string just like
 284          * XXX UDB CE trap handler does... -DaveM
 285          */
 286         printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
 287                "was_block(%d)\n",
 288                pbm->name,
 289                (afsr & SABRE_CEAFSR_ESYND) >> 48UL,
 290                (afsr & SABRE_CEAFSR_BMSK) >> 32UL,
 291                (afsr & SABRE_CEAFSR_OFF) >> 29UL,
 292                ((afsr & SABRE_CEAFSR_BLK) ? 1 : 0));
 293         printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
 294         printk("%s: CE Secondary errors [", pbm->name);
 295         reported = 0;
 296         if (afsr & SABRE_CEAFSR_SDRD) {
 297                 reported++;
 298                 printk("(DMA Read)");
 299         }
 300         if (afsr & SABRE_CEAFSR_SDWR) {
 301                 reported++;
 302                 printk("(DMA Write)");
 303         }
 304         if (!reported)
 305                 printk("(none)");
 306         printk("]\n");
 307
 308         return IRQ_HANDLED;
 309 }
 310
 311 static void sabre_register_error_handlers(struct pci_pbm_info *pbm)
 312 {
 313         struct device_node *dp = pbm->op->node;
 314         struct of_device *op;
 315         unsigned long base = pbm->controller_regs;
 316         u64 tmp;
 317         int err;
 318
 319         if (pbm->chip_type == PBM_CHIP_TYPE_SABRE)
 320                 dp = dp->parent;
 321
 322         op = of_find_device_by_node(dp);
 323         if (!op)
 324                 return;
 325
 326         /* Sabre/Hummingbird IRQ property layout is:
 327          * 0: PCI ERR
 328          * 1: UE ERR
 329          * 2: CE ERR
 330          * 3: POWER FAIL
 331          */
 332         if (op->num_irqs < 4)
 333                 return;
 334
 335         /* We clear the error bits in the appropriate AFSR before
 336          * registering the handler so that we don't get spurious
 337          * interrupts.
 338          */
 339         upa_writeq((SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR |
 340                     SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR |
 341                     SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE),
 342                    base + SABRE_UE_AFSR);
 343
 344         err = request_irq(op->irqs[1], sabre_ue_intr, 0, "SABRE_UE", pbm);
 345         if (err)
 346                 printk(KERN_WARNING "%s: Couldn't register UE, err=%d.\n",
 347                        pbm->name, err);
 348
 349         upa_writeq((SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR |
 350                     SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR),
 351                    base + SABRE_CE_AFSR);
 352
 353
 354         err = request_irq(op->irqs[2], sabre_ce_intr, 0, "SABRE_CE", pbm);
 355         if (err)
 356                 printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n",
 357                        pbm->name, err);
 358         err = request_irq(op->irqs[0], psycho_pcierr_intr, 0,
 359                           "SABRE_PCIERR", pbm);
 360         if (err)
 361                 printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n",
 362                        pbm->name, err);
 363
 364         tmp = upa_readq(base + SABRE_PCICTRL);
 365         tmp |= SABRE_PCICTRL_ERREN;
 366         upa_writeq(tmp, base + SABRE_PCICTRL);
 367 }
 368
 369 static void apb_init(struct pci_bus *sabre_bus)
 370 {
 371         struct pci_dev *pdev;
 372
 373         list_for_each_entry(pdev, &sabre_bus->devices, bus_list) {
 374                 if (pdev->vendor == PCI_VENDOR_ID_SUN &&
 375                     pdev->device == PCI_DEVICE_ID_SUN_SIMBA) {
 376                         u16 word16;
 377
 378                         pci_read_config_word(pdev, PCI_COMMAND, &word16);
 379                         word16 |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY |
 380                                 PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY |
 381                                 PCI_COMMAND_IO;
 382                         pci_write_config_word(pdev, PCI_COMMAND, word16);
 383
 384                         /* Status register bits are "write 1 to clear". */
 385                         pci_write_config_word(pdev, PCI_STATUS, 0xffff);
 386                         pci_write_config_word(pdev, PCI_SEC_STATUS, 0xffff);
 387
 388                         /* Use a primary/seconday latency timer value
 389                          * of 64.
 390                          */
 391                         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
 392                         pci_write_config_byte(pdev, PCI_SEC_LATENCY_TIMER, 64);
 393
 394                         /* Enable reporting/forwarding of master aborts,
 395                          * parity, and SERR.
 396                          */
 397                         pci_write_config_byte(pdev, PCI_BRIDGE_CONTROL,
 398                                               (PCI_BRIDGE_CTL_PARITY |
 399                                                PCI_BRIDGE_CTL_SERR |
 400                                                PCI_BRIDGE_CTL_MASTER_ABORT));
 401                 }
 402         }
 403 }
 404
 405 static void __devinit sabre_scan_bus(struct pci_pbm_info *pbm,
 406                                      struct device *parent)
 407 {
 408         static int once;
 409
 410         /* The APB bridge speaks to the Sabre host PCI bridge
 411          * at 66Mhz, but the front side of APB runs at 33Mhz
 412          * for both segments.
 413          *
 414          * Hummingbird systems do not use APB, so they run
 415          * at 66MHZ.
 416          */
 417         if (hummingbird_p)
 418                 pbm->is_66mhz_capable = 1;
 419         else
 420                 pbm->is_66mhz_capable = 0;
 421
 422         /* This driver has not been verified to handle
 423          * multiple SABREs yet, so trap this.
 424          *
 425          * Also note that the SABRE host bridge is hardwired
 426          * to live at bus 0.
 427          */
 428         if (once != 0) {
 429                 printk(KERN_ERR PFX "Multiple controllers unsupported.\n");
 430                 return;
 431         }
 432         once++;
 433
 434         pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
 435         if (!pbm->pci_bus)
 436                 return;
 437
 438         sabre_root_bus = pbm->pci_bus;
 439
 440         apb_init(pbm->pci_bus);
 441
 442         sabre_register_error_handlers(pbm);
 443 }
 444
 445 static void __devinit sabre_pbm_init(struct pci_pbm_info *pbm,
 446                                      struct of_device *op)
 447 {
 448         psycho_pbm_init_common(pbm, op, "SABRE", PBM_CHIP_TYPE_SABRE);
 449         pbm->pci_afsr = pbm->controller_regs + SABRE_PIOAFSR;
 450         pbm->pci_afar = pbm->controller_regs + SABRE_PIOAFAR;
 451         pbm->pci_csr = pbm->controller_regs + SABRE_PCICTRL;
 452         sabre_scan_bus(pbm, &op->dev);
 453 }
 454
 455 static int __devinit sabre_probe(struct of_device *op,
 456                                  const struct of_device_id *match)
 457 {
 458         const struct linux_prom64_registers *pr_regs;
 459         struct device_node *dp = op->node;
 460         struct pci_pbm_info *pbm;
 461         u32 upa_portid, dma_mask;
 462         struct iommu *iommu;
 463         int tsbsize, err;
 464         const u32 *vdma;
 465         u64 clear_irq;
 466
 467         hummingbird_p = (match->data != NULL);
 468         if (!hummingbird_p) {
 469                 struct device_node *cpu_dp;
 470
 471                 /* Of course, Sun has to encode things a thousand
 472                  * different ways, inconsistently.
 473                  */
 474                 for_each_node_by_type(cpu_dp, "cpu") {
 475                         if (!strcmp(cpu_dp->name, "SUNW,UltraSPARC-IIe"))
 476                                 hummingbird_p = 1;
 477                 }
 478         }
 479
 480         err = -ENOMEM;
 481         pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
 482         if (!pbm) {
 483                 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
 484                 goto out_err;
 485         }
 486
 487         iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
 488         if (!iommu) {
 489                 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
 490                 goto out_free_controller;
 491         }
 492
 493         pbm->iommu = iommu;
 494
 495         upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
 496
 497         pbm->portid = upa_portid;
 498
 499         /*
 500          * Map in SABRE register set and report the presence of this SABRE.
 501          */
 502
 503         pr_regs = of_get_property(dp, "reg", NULL);
 504         err = -ENODEV;
 505         if (!pr_regs) {
 506                 printk(KERN_ERR PFX "No reg property\n");
 507                 goto out_free_iommu;
 508         }
 509
 510         /*
 511          * First REG in property is base of entire SABRE register space.
 512          */
 513         pbm->controller_regs = pr_regs[0].phys_addr;
 514
 515         /* Clear interrupts */
 516
 517         /* PCI first */
 518         for (clear_irq = SABRE_ICLR_A_SLOT0; clear_irq < SABRE_ICLR_B_SLOT0 + 0x80; clear_irq += 8)
 519                 upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
 520
 521         /* Then OBIO */
 522         for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8)
 523                 upa_writeq(0x0UL, pbm->controller_regs + clear_irq);
 524
 525         /* Error interrupts are enabled later after the bus scan. */
 526         upa_writeq((SABRE_PCICTRL_MRLEN   | SABRE_PCICTRL_SERR |
 527                     SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN),
 528                    pbm->controller_regs + SABRE_PCICTRL);
 529
 530         /* Now map in PCI config space for entire SABRE. */
 531         pbm->config_space = pbm->controller_regs + SABRE_CONFIGSPACE;
 532
 533         vdma = of_get_property(dp, "virtual-dma", NULL);
 534         if (!vdma) {
 535                 printk(KERN_ERR PFX "No virtual-dma property\n");
 536                 goto out_free_iommu;
 537         }
 538
 539         dma_mask = vdma[0];
 540         switch(vdma[1]) {
 541                 case 0x20000000:
 542                         dma_mask |= 0x1fffffff;
 543                         tsbsize = 64;
 544                         break;
 545                 case 0x40000000:
 546                         dma_mask |= 0x3fffffff;
 547                         tsbsize = 128;
 548                         break;
 549
 550                 case 0x80000000:
 551                         dma_mask |= 0x7fffffff;
 552                         tsbsize = 128;
 553                         break;
 554                 default:
 555                         printk(KERN_ERR PFX "Strange virtual-dma size.\n");
 556                         goto out_free_iommu;
 557         }
 558
 559         err = psycho_iommu_init(pbm, tsbsize, vdma[0], dma_mask, SABRE_WRSYNC);
 560         if (err)
 561                 goto out_free_iommu;
 562
 563         /*
 564          * Look for APB underneath.
 565          */
 566         sabre_pbm_init(pbm, op);
 567
 568         pbm->next = pci_pbm_root;
 569         pci_pbm_root = pbm;
 570
 571         dev_set_drvdata(&op->dev, pbm);
 572
 573         return 0;
 574
 575 out_free_iommu:
 576         kfree(pbm->iommu);
 577
 578 out_free_controller:
 579         kfree(pbm);
 580
 581 out_err:
 582         return err;
 583 }
 584
 585 static struct of_device_id __initdata sabre_match[] = {
 586         {
 587                 .name = "pci",
 588                 .compatible = "pci108e,a001",
 589                 .data = (void *) 1,
 590         },
 591         {
 592                 .name = "pci",
 593                 .compatible = "pci108e,a000",
 594         },
 595         {},
 596 };
 597
 598 static struct of_platform_driver sabre_driver = {
 599         .name           = DRIVER_NAME,
 600         .match_table    = sabre_match,
 601         .probe          = sabre_probe,
 602 };
 603
 604 static int __init sabre_init(void)
 605 {
 606         return of_register_driver(&sabre_driver, &of_bus_type);
 607 }
 608
 609 subsys_initcall(sabre_init);