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/export.h> 13 #include <linux/slab.h> 14 #include <linux/interrupt.h> 15 #include <linux/of_device.h> 16 17 #include <asm/apb.h> 18 #include <asm/iommu.h> 19 #include <asm/irq.h> 20 #include <asm/prom.h> 21 #include <asm/upa.h> 22 23 #include "pci_impl.h" 24 #include "iommu_common.h" 25 #include "psycho_common.h" 26 27 #define DRIVER_NAME "sabre" 28 #define PFX DRIVER_NAME ": " 29 30 /* SABRE PCI controller register offsets and definitions. */ 31 #define SABRE_UE_AFSR 0x0030UL 32 #define SABRE_UEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */ 33 #define SABRE_UEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */ 34 #define SABRE_UEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */ 35 #define SABRE_UEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */ 36 #define SABRE_UEAFSR_SDTE 0x0200000000000000UL /* Secondary DMA Translation Error */ 37 #define SABRE_UEAFSR_PDTE 0x0100000000000000UL /* Primary DMA Translation Error */ 38 #define SABRE_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */ 39 #define SABRE_UEAFSR_OFF 0x00000000e0000000UL /* Offset (AFAR bits [5:3] */ 40 #define SABRE_UEAFSR_BLK 0x0000000000800000UL /* Was block operation */ 41 #define SABRE_UECE_AFAR 0x0038UL 42 #define SABRE_CE_AFSR 0x0040UL 43 #define SABRE_CEAFSR_PDRD 0x4000000000000000UL /* Primary PCI DMA Read */ 44 #define SABRE_CEAFSR_PDWR 0x2000000000000000UL /* Primary PCI DMA Write */ 45 #define SABRE_CEAFSR_SDRD 0x0800000000000000UL /* Secondary PCI DMA Read */ 46 #define SABRE_CEAFSR_SDWR 0x0400000000000000UL /* Secondary PCI DMA Write */ 47 #define SABRE_CEAFSR_ESYND 0x00ff000000000000UL /* ECC Syndrome */ 48 #define SABRE_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask */ 49 #define SABRE_CEAFSR_OFF 0x00000000e0000000UL /* Offset */ 50 #define SABRE_CEAFSR_BLK 0x0000000000800000UL /* Was block operation */ 51 #define SABRE_UECE_AFAR_ALIAS 0x0048UL /* Aliases to 0x0038 */ 52 #define SABRE_IOMMU_CONTROL 0x0200UL 53 #define SABRE_IOMMUCTRL_ERRSTS 0x0000000006000000UL /* Error status bits */ 54 #define SABRE_IOMMUCTRL_ERR 0x0000000001000000UL /* Error present in IOTLB */ 55 #define SABRE_IOMMUCTRL_LCKEN 0x0000000000800000UL /* IOTLB lock enable */ 56 #define SABRE_IOMMUCTRL_LCKPTR 0x0000000000780000UL /* IOTLB lock pointer */ 57 #define SABRE_IOMMUCTRL_TSBSZ 0x0000000000070000UL /* TSB Size */ 58 #define SABRE_IOMMU_TSBSZ_1K 0x0000000000000000 59 #define SABRE_IOMMU_TSBSZ_2K 0x0000000000010000 60 #define SABRE_IOMMU_TSBSZ_4K 0x0000000000020000 61 #define SABRE_IOMMU_TSBSZ_8K 0x0000000000030000 62 #define SABRE_IOMMU_TSBSZ_16K 0x0000000000040000 63 #define SABRE_IOMMU_TSBSZ_32K 0x0000000000050000 64 #define SABRE_IOMMU_TSBSZ_64K 0x0000000000060000 65 #define SABRE_IOMMU_TSBSZ_128K 0x0000000000070000 66 #define SABRE_IOMMUCTRL_TBWSZ 0x0000000000000004UL /* TSB assumed page size */ 67 #define SABRE_IOMMUCTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */ 68 #define SABRE_IOMMUCTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */ 69 #define SABRE_IOMMU_TSBBASE 0x0208UL 70 #define SABRE_IOMMU_FLUSH 0x0210UL 71 #define SABRE_IMAP_A_SLOT0 0x0c00UL 72 #define SABRE_IMAP_B_SLOT0 0x0c20UL 73 #define SABRE_IMAP_SCSI 0x1000UL 74 #define SABRE_IMAP_ETH 0x1008UL 75 #define SABRE_IMAP_BPP 0x1010UL 76 #define SABRE_IMAP_AU_REC 0x1018UL 77 #define SABRE_IMAP_AU_PLAY 0x1020UL 78 #define SABRE_IMAP_PFAIL 0x1028UL 79 #define SABRE_IMAP_KMS 0x1030UL 80 #define SABRE_IMAP_FLPY 0x1038UL 81 #define SABRE_IMAP_SHW 0x1040UL 82 #define SABRE_IMAP_KBD 0x1048UL 83 #define SABRE_IMAP_MS 0x1050UL 84 #define SABRE_IMAP_SER 0x1058UL 85 #define SABRE_IMAP_UE 0x1070UL 86 #define SABRE_IMAP_CE 0x1078UL 87 #define SABRE_IMAP_PCIERR 0x1080UL 88 #define SABRE_IMAP_GFX 0x1098UL 89 #define SABRE_IMAP_EUPA 0x10a0UL 90 #define SABRE_ICLR_A_SLOT0 0x1400UL 91 #define SABRE_ICLR_B_SLOT0 0x1480UL 92 #define SABRE_ICLR_SCSI 0x1800UL 93 #define SABRE_ICLR_ETH 0x1808UL 94 #define SABRE_ICLR_BPP 0x1810UL 95 #define SABRE_ICLR_AU_REC 0x1818UL 96 #define SABRE_ICLR_AU_PLAY 0x1820UL 97 #define SABRE_ICLR_PFAIL 0x1828UL 98 #define SABRE_ICLR_KMS 0x1830UL 99 #define SABRE_ICLR_FLPY 0x1838UL 100 #define SABRE_ICLR_SHW 0x1840UL 101 #define SABRE_ICLR_KBD 0x1848UL 102 #define SABRE_ICLR_MS 0x1850UL 103 #define SABRE_ICLR_SER 0x1858UL 104 #define SABRE_ICLR_UE 0x1870UL 105 #define SABRE_ICLR_CE 0x1878UL 106 #define SABRE_ICLR_PCIERR 0x1880UL 107 #define SABRE_WRSYNC 0x1c20UL 108 #define SABRE_PCICTRL 0x2000UL 109 #define SABRE_PCICTRL_MRLEN 0x0000001000000000UL /* Use MemoryReadLine for block loads/stores */ 110 #define SABRE_PCICTRL_SERR 0x0000000400000000UL /* Set when SERR asserted on PCI bus */ 111 #define SABRE_PCICTRL_ARBPARK 0x0000000000200000UL /* Bus Parking 0=Ultra-IIi 1=prev-bus-owner */ 112 #define SABRE_PCICTRL_CPUPRIO 0x0000000000100000UL /* Ultra-IIi granted every other bus cycle */ 113 #define SABRE_PCICTRL_ARBPRIO 0x00000000000f0000UL /* Slot which is granted every other bus cycle */ 114 #define SABRE_PCICTRL_ERREN 0x0000000000000100UL /* PCI Error Interrupt Enable */ 115 #define SABRE_PCICTRL_RTRYWE 0x0000000000000080UL /* DMA Flow Control 0=wait-if-possible 1=retry */ 116 #define SABRE_PCICTRL_AEN 0x000000000000000fUL /* Slot PCI arbitration enables */ 117 #define SABRE_PIOAFSR 0x2010UL 118 #define SABRE_PIOAFSR_PMA 0x8000000000000000UL /* Primary Master Abort */ 119 #define SABRE_PIOAFSR_PTA 0x4000000000000000UL /* Primary Target Abort */ 120 #define SABRE_PIOAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */ 121 #define SABRE_PIOAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */ 122 #define SABRE_PIOAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort */ 123 #define SABRE_PIOAFSR_STA 0x0400000000000000UL /* Secondary Target Abort */ 124 #define SABRE_PIOAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */ 125 #define SABRE_PIOAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */ 126 #define SABRE_PIOAFSR_BMSK 0x0000ffff00000000UL /* Byte Mask */ 127 #define SABRE_PIOAFSR_BLK 0x0000000080000000UL /* Was Block Operation */ 128 #define SABRE_PIOAFAR 0x2018UL 129 #define SABRE_PCIDIAG 0x2020UL 130 #define SABRE_PCIDIAG_DRTRY 0x0000000000000040UL /* Disable PIO Retry Limit */ 131 #define SABRE_PCIDIAG_IPAPAR 0x0000000000000008UL /* Invert PIO Address Parity */ 132 #define SABRE_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO Data Parity */ 133 #define SABRE_PCIDIAG_IDDPAR 0x0000000000000002UL /* Invert DMA Data Parity */ 134 #define SABRE_PCIDIAG_ELPBK 0x0000000000000001UL /* Loopback Enable - not supported */ 135 #define SABRE_PCITASR 0x2028UL 136 #define SABRE_PCITASR_EF 0x0000000000000080UL /* Respond to 0xe0000000-0xffffffff */ 137 #define SABRE_PCITASR_CD 0x0000000000000040UL /* Respond to 0xc0000000-0xdfffffff */ 138 #define SABRE_PCITASR_AB 0x0000000000000020UL /* Respond to 0xa0000000-0xbfffffff */ 139 #define SABRE_PCITASR_89 0x0000000000000010UL /* Respond to 0x80000000-0x9fffffff */ 140 #define SABRE_PCITASR_67 0x0000000000000008UL /* Respond to 0x60000000-0x7fffffff */ 141 #define SABRE_PCITASR_45 0x0000000000000004UL /* Respond to 0x40000000-0x5fffffff */ 142 #define SABRE_PCITASR_23 0x0000000000000002UL /* Respond to 0x20000000-0x3fffffff */ 143 #define SABRE_PCITASR_01 0x0000000000000001UL /* Respond to 0x00000000-0x1fffffff */ 144 #define SABRE_PIOBUF_DIAG 0x5000UL 145 #define SABRE_DMABUF_DIAGLO 0x5100UL 146 #define SABRE_DMABUF_DIAGHI 0x51c0UL 147 #define SABRE_IMAP_GFX_ALIAS 0x6000UL /* Aliases to 0x1098 */ 148 #define SABRE_IMAP_EUPA_ALIAS 0x8000UL /* Aliases to 0x10a0 */ 149 #define SABRE_IOMMU_VADIAG 0xa400UL 150 #define SABRE_IOMMU_TCDIAG 0xa408UL 151 #define SABRE_IOMMU_TAG 0xa580UL 152 #define SABRE_IOMMUTAG_ERRSTS 0x0000000001800000UL /* Error status bits */ 153 #define SABRE_IOMMUTAG_ERR 0x0000000000400000UL /* Error present */ 154 #define SABRE_IOMMUTAG_WRITE 0x0000000000200000UL /* Page is writable */ 155 #define SABRE_IOMMUTAG_STREAM 0x0000000000100000UL /* Streamable bit - unused */ 156 #define SABRE_IOMMUTAG_SIZE 0x0000000000080000UL /* 0=8k 1=16k */ 157 #define SABRE_IOMMUTAG_VPN 0x000000000007ffffUL /* Virtual Page Number [31:13] */ 158 #define SABRE_IOMMU_DATA 0xa600UL 159 #define SABRE_IOMMUDATA_VALID 0x0000000040000000UL /* Valid */ 160 #define SABRE_IOMMUDATA_USED 0x0000000020000000UL /* Used (for LRU algorithm) */ 161 #define SABRE_IOMMUDATA_CACHE 0x0000000010000000UL /* Cacheable */ 162 #define SABRE_IOMMUDATA_PPN 0x00000000001fffffUL /* Physical Page Number [33:13] */ 163 #define SABRE_PCI_IRQSTATE 0xa800UL 164 #define SABRE_OBIO_IRQSTATE 0xa808UL 165 #define SABRE_FFBCFG 0xf000UL 166 #define SABRE_FFBCFG_SPRQS 0x000000000f000000 /* Slave P_RQST queue size */ 167 #define SABRE_FFBCFG_ONEREAD 0x0000000000004000 /* Slave supports one outstanding read */ 168 #define SABRE_MCCTRL0 0xf010UL 169 #define SABRE_MCCTRL0_RENAB 0x0000000080000000 /* Refresh Enable */ 170 #define SABRE_MCCTRL0_EENAB 0x0000000010000000 /* Enable all ECC functions */ 171 #define SABRE_MCCTRL0_11BIT 0x0000000000001000 /* Enable 11-bit column addressing */ 172 #define SABRE_MCCTRL0_DPP 0x0000000000000f00 /* DIMM Pair Present Bits */ 173 #define SABRE_MCCTRL0_RINTVL 0x00000000000000ff /* Refresh Interval */ 174 #define SABRE_MCCTRL1 0xf018UL 175 #define SABRE_MCCTRL1_AMDC 0x0000000038000000 /* Advance Memdata Clock */ 176 #define SABRE_MCCTRL1_ARDC 0x0000000007000000 /* Advance DRAM Read Data Clock */ 177 #define SABRE_MCCTRL1_CSR 0x0000000000e00000 /* CAS to RAS delay for CBR refresh */ 178 #define SABRE_MCCTRL1_CASRW 0x00000000001c0000 /* CAS length for read/write */ 179 #define SABRE_MCCTRL1_RCD 0x0000000000038000 /* RAS to CAS delay */ 180 #define SABRE_MCCTRL1_CP 0x0000000000007000 /* CAS Precharge */ 181 #define SABRE_MCCTRL1_RP 0x0000000000000e00 /* RAS Precharge */ 182 #define SABRE_MCCTRL1_RAS 0x00000000000001c0 /* Length of RAS for refresh */ 183 #define SABRE_MCCTRL1_CASRW2 0x0000000000000038 /* Must be same as CASRW */ 184 #define SABRE_MCCTRL1_RSC 0x0000000000000007 /* RAS after CAS hold time */ 185 #define SABRE_RESETCTRL 0xf020UL 186 187 #define SABRE_CONFIGSPACE 0x001000000UL 188 #define SABRE_IOSPACE 0x002000000UL 189 #define SABRE_IOSPACE_SIZE 0x000ffffffUL 190 #define SABRE_MEMSPACE 0x100000000UL 191 #define SABRE_MEMSPACE_SIZE 0x07fffffffUL 192 193 static int hummingbird_p; 194 static struct pci_bus *sabre_root_bus; 195 196 static irqreturn_t sabre_ue_intr(int irq, void *dev_id) 197 { 198 struct pci_pbm_info *pbm = dev_id; 199 unsigned long afsr_reg = pbm->controller_regs + SABRE_UE_AFSR; 200 unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR; 201 unsigned long afsr, afar, error_bits; 202 int reported; 203 204 /* Latch uncorrectable error status. */ 205 afar = upa_readq(afar_reg); 206 afsr = upa_readq(afsr_reg); 207 208 /* Clear the primary/secondary error status bits. */ 209 error_bits = afsr & 210 (SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR | 211 SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR | 212 SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE); 213 if (!error_bits) 214 return IRQ_NONE; 215 upa_writeq(error_bits, afsr_reg); 216 217 /* Log the error. */ 218 printk("%s: Uncorrectable Error, primary error type[%s%s]\n", 219 pbm->name, 220 ((error_bits & SABRE_UEAFSR_PDRD) ? 221 "DMA Read" : 222 ((error_bits & SABRE_UEAFSR_PDWR) ? 223 "DMA Write" : "???")), 224 ((error_bits & SABRE_UEAFSR_PDTE) ? 225 ":Translation Error" : "")); 226 printk("%s: bytemask[%04lx] dword_offset[%lx] was_block(%d)\n", 227 pbm->name, 228 (afsr & SABRE_UEAFSR_BMSK) >> 32UL, 229 (afsr & SABRE_UEAFSR_OFF) >> 29UL, 230 ((afsr & SABRE_UEAFSR_BLK) ? 1 : 0)); 231 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar); 232 printk("%s: UE Secondary errors [", pbm->name); 233 reported = 0; 234 if (afsr & SABRE_UEAFSR_SDRD) { 235 reported++; 236 printk("(DMA Read)"); 237 } 238 if (afsr & SABRE_UEAFSR_SDWR) { 239 reported++; 240 printk("(DMA Write)"); 241 } 242 if (afsr & SABRE_UEAFSR_SDTE) { 243 reported++; 244 printk("(Translation Error)"); 245 } 246 if (!reported) 247 printk("(none)"); 248 printk("]\n"); 249 250 /* Interrogate IOMMU for error status. */ 251 psycho_check_iommu_error(pbm, afsr, afar, UE_ERR); 252 253 return IRQ_HANDLED; 254 } 255 256 static irqreturn_t sabre_ce_intr(int irq, void *dev_id) 257 { 258 struct pci_pbm_info *pbm = dev_id; 259 unsigned long afsr_reg = pbm->controller_regs + SABRE_CE_AFSR; 260 unsigned long afar_reg = pbm->controller_regs + SABRE_UECE_AFAR; 261 unsigned long afsr, afar, error_bits; 262 int reported; 263 264 /* Latch error status. */ 265 afar = upa_readq(afar_reg); 266 afsr = upa_readq(afsr_reg); 267 268 /* Clear primary/secondary error status bits. */ 269 error_bits = afsr & 270 (SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR | 271 SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR); 272 if (!error_bits) 273 return IRQ_NONE; 274 upa_writeq(error_bits, afsr_reg); 275 276 /* Log the error. */ 277 printk("%s: Correctable Error, primary error type[%s]\n", 278 pbm->name, 279 ((error_bits & SABRE_CEAFSR_PDRD) ? 280 "DMA Read" : 281 ((error_bits & SABRE_CEAFSR_PDWR) ? 282 "DMA Write" : "???"))); 283 284 /* XXX Use syndrome and afar to print out module string just like 285 * XXX UDB CE trap handler does... -DaveM 286 */ 287 printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] " 288 "was_block(%d)\n", 289 pbm->name, 290 (afsr & SABRE_CEAFSR_ESYND) >> 48UL, 291 (afsr & SABRE_CEAFSR_BMSK) >> 32UL, 292 (afsr & SABRE_CEAFSR_OFF) >> 29UL, 293 ((afsr & SABRE_CEAFSR_BLK) ? 1 : 0)); 294 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar); 295 printk("%s: CE Secondary errors [", pbm->name); 296 reported = 0; 297 if (afsr & SABRE_CEAFSR_SDRD) { 298 reported++; 299 printk("(DMA Read)"); 300 } 301 if (afsr & SABRE_CEAFSR_SDWR) { 302 reported++; 303 printk("(DMA Write)"); 304 } 305 if (!reported) 306 printk("(none)"); 307 printk("]\n"); 308 309 return IRQ_HANDLED; 310 } 311 312 static void sabre_register_error_handlers(struct pci_pbm_info *pbm) 313 { 314 struct device_node *dp = pbm->op->dev.of_node; 315 struct platform_device *op; 316 unsigned long base = pbm->controller_regs; 317 u64 tmp; 318 int err; 319 320 if (pbm->chip_type == PBM_CHIP_TYPE_SABRE) 321 dp = dp->parent; 322 323 op = of_find_device_by_node(dp); 324 if (!op) 325 return; 326 327 /* Sabre/Hummingbird IRQ property layout is: 328 * 0: PCI ERR 329 * 1: UE ERR 330 * 2: CE ERR 331 * 3: POWER FAIL 332 */ 333 if (op->archdata.num_irqs < 4) 334 return; 335 336 /* We clear the error bits in the appropriate AFSR before 337 * registering the handler so that we don't get spurious 338 * interrupts. 339 */ 340 upa_writeq((SABRE_UEAFSR_PDRD | SABRE_UEAFSR_PDWR | 341 SABRE_UEAFSR_SDRD | SABRE_UEAFSR_SDWR | 342 SABRE_UEAFSR_SDTE | SABRE_UEAFSR_PDTE), 343 base + SABRE_UE_AFSR); 344 345 err = request_irq(op->archdata.irqs[1], sabre_ue_intr, 0, "SABRE_UE", pbm); 346 if (err) 347 printk(KERN_WARNING "%s: Couldn't register UE, err=%d.\n", 348 pbm->name, err); 349 350 upa_writeq((SABRE_CEAFSR_PDRD | SABRE_CEAFSR_PDWR | 351 SABRE_CEAFSR_SDRD | SABRE_CEAFSR_SDWR), 352 base + SABRE_CE_AFSR); 353 354 355 err = request_irq(op->archdata.irqs[2], sabre_ce_intr, 0, "SABRE_CE", pbm); 356 if (err) 357 printk(KERN_WARNING "%s: Couldn't register CE, err=%d.\n", 358 pbm->name, err); 359 err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, 0, 360 "SABRE_PCIERR", pbm); 361 if (err) 362 printk(KERN_WARNING "%s: Couldn't register PCIERR, err=%d.\n", 363 pbm->name, err); 364 365 tmp = upa_readq(base + SABRE_PCICTRL); 366 tmp |= SABRE_PCICTRL_ERREN; 367 upa_writeq(tmp, base + SABRE_PCICTRL); 368 } 369 370 static void apb_init(struct pci_bus *sabre_bus) 371 { 372 struct pci_dev *pdev; 373 374 list_for_each_entry(pdev, &sabre_bus->devices, bus_list) { 375 if (pdev->vendor == PCI_VENDOR_ID_SUN && 376 pdev->device == PCI_DEVICE_ID_SUN_SIMBA) { 377 u16 word16; 378 379 pci_read_config_word(pdev, PCI_COMMAND, &word16); 380 word16 |= PCI_COMMAND_SERR | PCI_COMMAND_PARITY | 381 PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | 382 PCI_COMMAND_IO; 383 pci_write_config_word(pdev, PCI_COMMAND, word16); 384 385 /* Status register bits are "write 1 to clear". */ 386 pci_write_config_word(pdev, PCI_STATUS, 0xffff); 387 pci_write_config_word(pdev, PCI_SEC_STATUS, 0xffff); 388 389 /* Use a primary/seconday latency timer value 390 * of 64. 391 */ 392 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64); 393 pci_write_config_byte(pdev, PCI_SEC_LATENCY_TIMER, 64); 394 395 /* Enable reporting/forwarding of master aborts, 396 * parity, and SERR. 397 */ 398 pci_write_config_byte(pdev, PCI_BRIDGE_CONTROL, 399 (PCI_BRIDGE_CTL_PARITY | 400 PCI_BRIDGE_CTL_SERR | 401 PCI_BRIDGE_CTL_MASTER_ABORT)); 402 } 403 } 404 } 405 406 static void sabre_scan_bus(struct pci_pbm_info *pbm, 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 sabre_pbm_init(struct pci_pbm_info *pbm, 446 struct platform_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 const struct of_device_id sabre_match[]; 456 static int sabre_probe(struct platform_device *op) 457 { 458 const struct of_device_id *match; 459 const struct linux_prom64_registers *pr_regs; 460 struct device_node *dp = op->dev.of_node; 461 struct pci_pbm_info *pbm; 462 u32 upa_portid, dma_mask; 463 struct iommu *iommu; 464 int tsbsize, err; 465 const u32 *vdma; 466 u64 clear_irq; 467 468 match = of_match_device(sabre_match, &op->dev); 469 hummingbird_p = match && (match->data != NULL); 470 if (!hummingbird_p) { 471 struct device_node *cpu_dp; 472 473 /* Of course, Sun has to encode things a thousand 474 * different ways, inconsistently. 475 */ 476 for_each_node_by_type(cpu_dp, "cpu") { 477 if (!strcmp(cpu_dp->name, "SUNW,UltraSPARC-IIe")) 478 hummingbird_p = 1; 479 } 480 } 481 482 err = -ENOMEM; 483 pbm = kzalloc(sizeof(*pbm), GFP_KERNEL); 484 if (!pbm) { 485 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n"); 486 goto out_err; 487 } 488 489 iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); 490 if (!iommu) { 491 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n"); 492 goto out_free_controller; 493 } 494 495 pbm->iommu = iommu; 496 497 upa_portid = of_getintprop_default(dp, "upa-portid", 0xff); 498 499 pbm->portid = upa_portid; 500 501 /* 502 * Map in SABRE register set and report the presence of this SABRE. 503 */ 504 505 pr_regs = of_get_property(dp, "reg", NULL); 506 err = -ENODEV; 507 if (!pr_regs) { 508 printk(KERN_ERR PFX "No reg property\n"); 509 goto out_free_iommu; 510 } 511 512 /* 513 * First REG in property is base of entire SABRE register space. 514 */ 515 pbm->controller_regs = pr_regs[0].phys_addr; 516 517 /* Clear interrupts */ 518 519 /* PCI first */ 520 for (clear_irq = SABRE_ICLR_A_SLOT0; clear_irq < SABRE_ICLR_B_SLOT0 + 0x80; clear_irq += 8) 521 upa_writeq(0x0UL, pbm->controller_regs + clear_irq); 522 523 /* Then OBIO */ 524 for (clear_irq = SABRE_ICLR_SCSI; clear_irq < SABRE_ICLR_SCSI + 0x80; clear_irq += 8) 525 upa_writeq(0x0UL, pbm->controller_regs + clear_irq); 526 527 /* Error interrupts are enabled later after the bus scan. */ 528 upa_writeq((SABRE_PCICTRL_MRLEN | SABRE_PCICTRL_SERR | 529 SABRE_PCICTRL_ARBPARK | SABRE_PCICTRL_AEN), 530 pbm->controller_regs + SABRE_PCICTRL); 531 532 /* Now map in PCI config space for entire SABRE. */ 533 pbm->config_space = pbm->controller_regs + SABRE_CONFIGSPACE; 534 535 vdma = of_get_property(dp, "virtual-dma", NULL); 536 if (!vdma) { 537 printk(KERN_ERR PFX "No virtual-dma property\n"); 538 goto out_free_iommu; 539 } 540 541 dma_mask = vdma[0]; 542 switch(vdma[1]) { 543 case 0x20000000: 544 dma_mask |= 0x1fffffff; 545 tsbsize = 64; 546 break; 547 case 0x40000000: 548 dma_mask |= 0x3fffffff; 549 tsbsize = 128; 550 break; 551 552 case 0x80000000: 553 dma_mask |= 0x7fffffff; 554 tsbsize = 128; 555 break; 556 default: 557 printk(KERN_ERR PFX "Strange virtual-dma size.\n"); 558 goto out_free_iommu; 559 } 560 561 err = psycho_iommu_init(pbm, tsbsize, vdma[0], dma_mask, SABRE_WRSYNC); 562 if (err) 563 goto out_free_iommu; 564 565 /* 566 * Look for APB underneath. 567 */ 568 sabre_pbm_init(pbm, op); 569 570 pbm->next = pci_pbm_root; 571 pci_pbm_root = pbm; 572 573 dev_set_drvdata(&op->dev, pbm); 574 575 return 0; 576 577 out_free_iommu: 578 kfree(pbm->iommu); 579 580 out_free_controller: 581 kfree(pbm); 582 583 out_err: 584 return err; 585 } 586 587 static const struct of_device_id sabre_match[] = { 588 { 589 .name = "pci", 590 .compatible = "pci108e,a001", 591 .data = (void *) 1, 592 }, 593 { 594 .name = "pci", 595 .compatible = "pci108e,a000", 596 }, 597 {}, 598 }; 599 600 static struct platform_driver sabre_driver = { 601 .driver = { 602 .name = DRIVER_NAME, 603 .of_match_table = sabre_match, 604 }, 605 .probe = sabre_probe, 606 }; 607 608 static int __init sabre_init(void) 609 { 610 return platform_driver_register(&sabre_driver); 611 } 612 613 subsys_initcall(sabre_init); 614