1 /* 2 * leon_pci_grpci1.c: GRPCI1 Host PCI driver 3 * 4 * Copyright (C) 2013 Aeroflex Gaisler AB 5 * 6 * This GRPCI1 driver does not support PCI interrupts taken from 7 * GPIO pins. Interrupt generation at PCI parity and system error 8 * detection is by default turned off since some GRPCI1 cores does 9 * not support detection. It can be turned on from the bootloader 10 * using the all_pci_errors property. 11 * 12 * Contributors: Daniel Hellstrom <daniel@gaisler.com> 13 */ 14 15 #include <linux/of_device.h> 16 #include <linux/export.h> 17 #include <linux/kernel.h> 18 #include <linux/of_irq.h> 19 #include <linux/delay.h> 20 #include <linux/pci.h> 21 22 #include <asm/leon_pci.h> 23 #include <asm/sections.h> 24 #include <asm/vaddrs.h> 25 #include <asm/leon.h> 26 #include <asm/io.h> 27 28 #include "irq.h" 29 30 /* Enable/Disable Debugging Configuration Space Access */ 31 #undef GRPCI1_DEBUG_CFGACCESS 32 33 /* 34 * GRPCI1 APB Register MAP 35 */ 36 struct grpci1_regs { 37 unsigned int cfg_stat; /* 0x00 Configuration / Status */ 38 unsigned int bar0; /* 0x04 BAR0 (RO) */ 39 unsigned int page0; /* 0x08 PAGE0 (RO) */ 40 unsigned int bar1; /* 0x0C BAR1 (RO) */ 41 unsigned int page1; /* 0x10 PAGE1 */ 42 unsigned int iomap; /* 0x14 IO Map */ 43 unsigned int stat_cmd; /* 0x18 PCI Status & Command (RO) */ 44 unsigned int irq; /* 0x1C Interrupt register */ 45 }; 46 47 #define REGLOAD(a) (be32_to_cpu(__raw_readl(&(a)))) 48 #define REGSTORE(a, v) (__raw_writel(cpu_to_be32(v), &(a))) 49 50 #define PAGE0_BTEN_BIT 0 51 #define PAGE0_BTEN (1 << PAGE0_BTEN_BIT) 52 53 #define CFGSTAT_HOST_BIT 13 54 #define CFGSTAT_CTO_BIT 8 55 #define CFGSTAT_HOST (1 << CFGSTAT_HOST_BIT) 56 #define CFGSTAT_CTO (1 << CFGSTAT_CTO_BIT) 57 58 #define IRQ_DPE (1 << 9) 59 #define IRQ_SSE (1 << 8) 60 #define IRQ_RMA (1 << 7) 61 #define IRQ_RTA (1 << 6) 62 #define IRQ_STA (1 << 5) 63 #define IRQ_DPED (1 << 4) 64 #define IRQ_INTD (1 << 3) 65 #define IRQ_INTC (1 << 2) 66 #define IRQ_INTB (1 << 1) 67 #define IRQ_INTA (1 << 0) 68 #define IRQ_DEF_ERRORS (IRQ_RMA | IRQ_RTA | IRQ_STA) 69 #define IRQ_ALL_ERRORS (IRQ_DPED | IRQ_DEF_ERRORS | IRQ_SSE | IRQ_DPE) 70 #define IRQ_INTX (IRQ_INTA | IRQ_INTB | IRQ_INTC | IRQ_INTD) 71 #define IRQ_MASK_BIT 16 72 73 #define DEF_PCI_ERRORS (PCI_STATUS_SIG_TARGET_ABORT | \ 74 PCI_STATUS_REC_TARGET_ABORT | \ 75 PCI_STATUS_REC_MASTER_ABORT) 76 #define ALL_PCI_ERRORS (PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY | \ 77 PCI_STATUS_SIG_SYSTEM_ERROR | DEF_PCI_ERRORS) 78 79 #define TGT 256 80 81 struct grpci1_priv { 82 struct leon_pci_info info; /* must be on top of this structure */ 83 struct grpci1_regs __iomem *regs; /* GRPCI register map */ 84 struct device *dev; 85 int pci_err_mask; /* STATUS register error mask */ 86 int irq; /* LEON irqctrl GRPCI IRQ */ 87 unsigned char irq_map[4]; /* GRPCI nexus PCI INTX# IRQs */ 88 unsigned int irq_err; /* GRPCI nexus Virt Error IRQ */ 89 90 /* AHB PCI Windows */ 91 unsigned long pci_area; /* MEMORY */ 92 unsigned long pci_area_end; 93 unsigned long pci_io; /* I/O */ 94 unsigned long pci_conf; /* CONFIGURATION */ 95 unsigned long pci_conf_end; 96 unsigned long pci_io_va; 97 }; 98 99 static struct grpci1_priv *grpci1priv; 100 101 static int grpci1_cfg_w32(struct grpci1_priv *priv, unsigned int bus, 102 unsigned int devfn, int where, u32 val); 103 104 static int grpci1_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 105 { 106 struct grpci1_priv *priv = dev->bus->sysdata; 107 int irq_group; 108 109 /* Use default IRQ decoding on PCI BUS0 according slot numbering */ 110 irq_group = slot & 0x3; 111 pin = ((pin - 1) + irq_group) & 0x3; 112 113 return priv->irq_map[pin]; 114 } 115 116 static int grpci1_cfg_r32(struct grpci1_priv *priv, unsigned int bus, 117 unsigned int devfn, int where, u32 *val) 118 { 119 u32 *pci_conf, tmp, cfg; 120 121 if (where & 0x3) 122 return -EINVAL; 123 124 if (bus == 0) { 125 devfn += (0x8 * 6); /* start at AD16=Device0 */ 126 } else if (bus == TGT) { 127 bus = 0; 128 devfn = 0; /* special case: bridge controller itself */ 129 } 130 131 /* Select bus */ 132 cfg = REGLOAD(priv->regs->cfg_stat); 133 REGSTORE(priv->regs->cfg_stat, (cfg & ~(0xf << 23)) | (bus << 23)); 134 135 /* do read access */ 136 pci_conf = (u32 *) (priv->pci_conf | (devfn << 8) | (where & 0xfc)); 137 tmp = LEON3_BYPASS_LOAD_PA(pci_conf); 138 139 /* check if master abort was received */ 140 if (REGLOAD(priv->regs->cfg_stat) & CFGSTAT_CTO) { 141 *val = 0xffffffff; 142 /* Clear Master abort bit in PCI cfg space (is set) */ 143 tmp = REGLOAD(priv->regs->stat_cmd); 144 grpci1_cfg_w32(priv, TGT, 0, PCI_COMMAND, tmp); 145 } else { 146 /* Bus always little endian (unaffected by byte-swapping) */ 147 *val = swab32(tmp); 148 } 149 150 return 0; 151 } 152 153 static int grpci1_cfg_r16(struct grpci1_priv *priv, unsigned int bus, 154 unsigned int devfn, int where, u32 *val) 155 { 156 u32 v; 157 int ret; 158 159 if (where & 0x1) 160 return -EINVAL; 161 ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v); 162 *val = 0xffff & (v >> (8 * (where & 0x3))); 163 return ret; 164 } 165 166 static int grpci1_cfg_r8(struct grpci1_priv *priv, unsigned int bus, 167 unsigned int devfn, int where, u32 *val) 168 { 169 u32 v; 170 int ret; 171 172 ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v); 173 *val = 0xff & (v >> (8 * (where & 3))); 174 175 return ret; 176 } 177 178 static int grpci1_cfg_w32(struct grpci1_priv *priv, unsigned int bus, 179 unsigned int devfn, int where, u32 val) 180 { 181 unsigned int *pci_conf; 182 u32 cfg; 183 184 if (where & 0x3) 185 return -EINVAL; 186 187 if (bus == 0) { 188 devfn += (0x8 * 6); /* start at AD16=Device0 */ 189 } else if (bus == TGT) { 190 bus = 0; 191 devfn = 0; /* special case: bridge controller itself */ 192 } 193 194 /* Select bus */ 195 cfg = REGLOAD(priv->regs->cfg_stat); 196 REGSTORE(priv->regs->cfg_stat, (cfg & ~(0xf << 23)) | (bus << 23)); 197 198 pci_conf = (unsigned int *) (priv->pci_conf | 199 (devfn << 8) | (where & 0xfc)); 200 LEON3_BYPASS_STORE_PA(pci_conf, swab32(val)); 201 202 return 0; 203 } 204 205 static int grpci1_cfg_w16(struct grpci1_priv *priv, unsigned int bus, 206 unsigned int devfn, int where, u32 val) 207 { 208 int ret; 209 u32 v; 210 211 if (where & 0x1) 212 return -EINVAL; 213 ret = grpci1_cfg_r32(priv, bus, devfn, where&~3, &v); 214 if (ret) 215 return ret; 216 v = (v & ~(0xffff << (8 * (where & 0x3)))) | 217 ((0xffff & val) << (8 * (where & 0x3))); 218 return grpci1_cfg_w32(priv, bus, devfn, where & ~0x3, v); 219 } 220 221 static int grpci1_cfg_w8(struct grpci1_priv *priv, unsigned int bus, 222 unsigned int devfn, int where, u32 val) 223 { 224 int ret; 225 u32 v; 226 227 ret = grpci1_cfg_r32(priv, bus, devfn, where & ~0x3, &v); 228 if (ret != 0) 229 return ret; 230 v = (v & ~(0xff << (8 * (where & 0x3)))) | 231 ((0xff & val) << (8 * (where & 0x3))); 232 return grpci1_cfg_w32(priv, bus, devfn, where & ~0x3, v); 233 } 234 235 /* Read from Configuration Space. When entering here the PCI layer has taken 236 * the pci_lock spinlock and IRQ is off. 237 */ 238 static int grpci1_read_config(struct pci_bus *bus, unsigned int devfn, 239 int where, int size, u32 *val) 240 { 241 struct grpci1_priv *priv = grpci1priv; 242 unsigned int busno = bus->number; 243 int ret; 244 245 if (PCI_SLOT(devfn) > 15 || busno > 15) { 246 *val = ~0; 247 return 0; 248 } 249 250 switch (size) { 251 case 1: 252 ret = grpci1_cfg_r8(priv, busno, devfn, where, val); 253 break; 254 case 2: 255 ret = grpci1_cfg_r16(priv, busno, devfn, where, val); 256 break; 257 case 4: 258 ret = grpci1_cfg_r32(priv, busno, devfn, where, val); 259 break; 260 default: 261 ret = -EINVAL; 262 break; 263 } 264 265 #ifdef GRPCI1_DEBUG_CFGACCESS 266 printk(KERN_INFO 267 "grpci1_read_config: [%02x:%02x:%x] ofs=%d val=%x size=%d\n", 268 busno, PCI_SLOT(devfn), PCI_FUNC(devfn), where, *val, size); 269 #endif 270 271 return ret; 272 } 273 274 /* Write to Configuration Space. When entering here the PCI layer has taken 275 * the pci_lock spinlock and IRQ is off. 276 */ 277 static int grpci1_write_config(struct pci_bus *bus, unsigned int devfn, 278 int where, int size, u32 val) 279 { 280 struct grpci1_priv *priv = grpci1priv; 281 unsigned int busno = bus->number; 282 283 if (PCI_SLOT(devfn) > 15 || busno > 15) 284 return 0; 285 286 #ifdef GRPCI1_DEBUG_CFGACCESS 287 printk(KERN_INFO 288 "grpci1_write_config: [%02x:%02x:%x] ofs=%d size=%d val=%x\n", 289 busno, PCI_SLOT(devfn), PCI_FUNC(devfn), where, size, val); 290 #endif 291 292 switch (size) { 293 default: 294 return -EINVAL; 295 case 1: 296 return grpci1_cfg_w8(priv, busno, devfn, where, val); 297 case 2: 298 return grpci1_cfg_w16(priv, busno, devfn, where, val); 299 case 4: 300 return grpci1_cfg_w32(priv, busno, devfn, where, val); 301 } 302 } 303 304 static struct pci_ops grpci1_ops = { 305 .read = grpci1_read_config, 306 .write = grpci1_write_config, 307 }; 308 309 /* GENIRQ IRQ chip implementation for grpci1 irqmode=0..2. In configuration 310 * 3 where all PCI Interrupts has a separate IRQ on the system IRQ controller 311 * this is not needed and the standard IRQ controller can be used. 312 */ 313 314 static void grpci1_mask_irq(struct irq_data *data) 315 { 316 u32 irqidx; 317 struct grpci1_priv *priv = grpci1priv; 318 319 irqidx = (u32)data->chip_data - 1; 320 if (irqidx > 3) /* only mask PCI interrupts here */ 321 return; 322 irqidx += IRQ_MASK_BIT; 323 324 REGSTORE(priv->regs->irq, REGLOAD(priv->regs->irq) & ~(1 << irqidx)); 325 } 326 327 static void grpci1_unmask_irq(struct irq_data *data) 328 { 329 u32 irqidx; 330 struct grpci1_priv *priv = grpci1priv; 331 332 irqidx = (u32)data->chip_data - 1; 333 if (irqidx > 3) /* only unmask PCI interrupts here */ 334 return; 335 irqidx += IRQ_MASK_BIT; 336 337 REGSTORE(priv->regs->irq, REGLOAD(priv->regs->irq) | (1 << irqidx)); 338 } 339 340 static unsigned int grpci1_startup_irq(struct irq_data *data) 341 { 342 grpci1_unmask_irq(data); 343 return 0; 344 } 345 346 static void grpci1_shutdown_irq(struct irq_data *data) 347 { 348 grpci1_mask_irq(data); 349 } 350 351 static struct irq_chip grpci1_irq = { 352 .name = "grpci1", 353 .irq_startup = grpci1_startup_irq, 354 .irq_shutdown = grpci1_shutdown_irq, 355 .irq_mask = grpci1_mask_irq, 356 .irq_unmask = grpci1_unmask_irq, 357 }; 358 359 /* Handle one or multiple IRQs from the PCI core */ 360 static void grpci1_pci_flow_irq(struct irq_desc *desc) 361 { 362 struct grpci1_priv *priv = grpci1priv; 363 int i, ack = 0; 364 unsigned int irqreg; 365 366 irqreg = REGLOAD(priv->regs->irq); 367 irqreg = (irqreg >> IRQ_MASK_BIT) & irqreg; 368 369 /* Error Interrupt? */ 370 if (irqreg & IRQ_ALL_ERRORS) { 371 generic_handle_irq(priv->irq_err); 372 ack = 1; 373 } 374 375 /* PCI Interrupt? */ 376 if (irqreg & IRQ_INTX) { 377 /* Call respective PCI Interrupt handler */ 378 for (i = 0; i < 4; i++) { 379 if (irqreg & (1 << i)) 380 generic_handle_irq(priv->irq_map[i]); 381 } 382 ack = 1; 383 } 384 385 /* 386 * Call "first level" IRQ chip end-of-irq handler. It will ACK LEON IRQ 387 * Controller, this must be done after IRQ sources have been handled to 388 * avoid double IRQ generation 389 */ 390 if (ack) 391 desc->irq_data.chip->irq_eoi(&desc->irq_data); 392 } 393 394 /* Create a virtual IRQ */ 395 static unsigned int grpci1_build_device_irq(unsigned int irq) 396 { 397 unsigned int virq = 0, pil; 398 399 pil = 1 << 8; 400 virq = irq_alloc(irq, pil); 401 if (virq == 0) 402 goto out; 403 404 irq_set_chip_and_handler_name(virq, &grpci1_irq, handle_simple_irq, 405 "pcilvl"); 406 irq_set_chip_data(virq, (void *)irq); 407 408 out: 409 return virq; 410 } 411 412 /* 413 * Initialize mappings AMBA<->PCI, clear IRQ state, setup PCI interface 414 * 415 * Target BARs: 416 * BAR0: unused in this implementation 417 * BAR1: peripheral DMA to host's memory (size at least 256MByte) 418 * BAR2..BAR5: not implemented in hardware 419 */ 420 static void grpci1_hw_init(struct grpci1_priv *priv) 421 { 422 u32 ahbadr, bar_sz, data, pciadr; 423 struct grpci1_regs __iomem *regs = priv->regs; 424 425 /* set 1:1 mapping between AHB -> PCI memory space */ 426 REGSTORE(regs->cfg_stat, priv->pci_area & 0xf0000000); 427 428 /* map PCI accesses to target BAR1 to Linux kernel memory 1:1 */ 429 ahbadr = 0xf0000000 & (u32)__pa(PAGE_ALIGN((unsigned long) &_end)); 430 REGSTORE(regs->page1, ahbadr); 431 432 /* translate I/O accesses to 0, I/O Space always @ PCI low 64Kbytes */ 433 REGSTORE(regs->iomap, REGLOAD(regs->iomap) & 0x0000ffff); 434 435 /* disable and clear pending interrupts */ 436 REGSTORE(regs->irq, 0); 437 438 /* Setup BAR0 outside access range so that it does not conflict with 439 * peripheral DMA. There is no need to set up the PAGE0 register. 440 */ 441 grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_0, 0xffffffff); 442 grpci1_cfg_r32(priv, TGT, 0, PCI_BASE_ADDRESS_0, &bar_sz); 443 bar_sz = ~bar_sz + 1; 444 pciadr = priv->pci_area - bar_sz; 445 grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_0, pciadr); 446 447 /* 448 * Setup the Host's PCI Target BAR1 for other peripherals to access, 449 * and do DMA to the host's memory. 450 */ 451 grpci1_cfg_w32(priv, TGT, 0, PCI_BASE_ADDRESS_1, ahbadr); 452 453 /* 454 * Setup Latency Timer and cache line size. Default cache line 455 * size will result in poor performance (256 word fetches), 0xff 456 * will set it according to the max size of the PCI FIFO. 457 */ 458 grpci1_cfg_w8(priv, TGT, 0, PCI_CACHE_LINE_SIZE, 0xff); 459 grpci1_cfg_w8(priv, TGT, 0, PCI_LATENCY_TIMER, 0x40); 460 461 /* set as bus master, enable pci memory responses, clear status bits */ 462 grpci1_cfg_r32(priv, TGT, 0, PCI_COMMAND, &data); 463 data |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 464 grpci1_cfg_w32(priv, TGT, 0, PCI_COMMAND, data); 465 } 466 467 static irqreturn_t grpci1_jump_interrupt(int irq, void *arg) 468 { 469 struct grpci1_priv *priv = arg; 470 dev_err(priv->dev, "Jump IRQ happened\n"); 471 return IRQ_NONE; 472 } 473 474 /* Handle GRPCI1 Error Interrupt */ 475 static irqreturn_t grpci1_err_interrupt(int irq, void *arg) 476 { 477 struct grpci1_priv *priv = arg; 478 u32 status; 479 480 grpci1_cfg_r16(priv, TGT, 0, PCI_STATUS, &status); 481 status &= priv->pci_err_mask; 482 483 if (status == 0) 484 return IRQ_NONE; 485 486 if (status & PCI_STATUS_PARITY) 487 dev_err(priv->dev, "Data Parity Error\n"); 488 489 if (status & PCI_STATUS_SIG_TARGET_ABORT) 490 dev_err(priv->dev, "Signalled Target Abort\n"); 491 492 if (status & PCI_STATUS_REC_TARGET_ABORT) 493 dev_err(priv->dev, "Received Target Abort\n"); 494 495 if (status & PCI_STATUS_REC_MASTER_ABORT) 496 dev_err(priv->dev, "Received Master Abort\n"); 497 498 if (status & PCI_STATUS_SIG_SYSTEM_ERROR) 499 dev_err(priv->dev, "Signalled System Error\n"); 500 501 if (status & PCI_STATUS_DETECTED_PARITY) 502 dev_err(priv->dev, "Parity Error\n"); 503 504 /* Clear handled INT TYPE IRQs */ 505 grpci1_cfg_w16(priv, TGT, 0, PCI_STATUS, status); 506 507 return IRQ_HANDLED; 508 } 509 510 static int grpci1_of_probe(struct platform_device *ofdev) 511 { 512 struct grpci1_regs __iomem *regs; 513 struct grpci1_priv *priv; 514 int err, len; 515 const int *tmp; 516 u32 cfg, size, err_mask; 517 struct resource *res; 518 519 if (grpci1priv) { 520 dev_err(&ofdev->dev, "only one GRPCI1 supported\n"); 521 return -ENODEV; 522 } 523 524 if (ofdev->num_resources < 3) { 525 dev_err(&ofdev->dev, "not enough APB/AHB resources\n"); 526 return -EIO; 527 } 528 529 priv = devm_kzalloc(&ofdev->dev, sizeof(*priv), GFP_KERNEL); 530 if (!priv) { 531 dev_err(&ofdev->dev, "memory allocation failed\n"); 532 return -ENOMEM; 533 } 534 platform_set_drvdata(ofdev, priv); 535 priv->dev = &ofdev->dev; 536 537 /* find device register base address */ 538 res = platform_get_resource(ofdev, IORESOURCE_MEM, 0); 539 regs = devm_ioremap_resource(&ofdev->dev, res); 540 if (IS_ERR(regs)) 541 return PTR_ERR(regs); 542 543 /* 544 * check that we're in Host Slot and that we can act as a Host Bridge 545 * and not only as target/peripheral. 546 */ 547 cfg = REGLOAD(regs->cfg_stat); 548 if ((cfg & CFGSTAT_HOST) == 0) { 549 dev_err(&ofdev->dev, "not in host system slot\n"); 550 return -EIO; 551 } 552 553 /* check that BAR1 support 256 MByte so that we can map kernel space */ 554 REGSTORE(regs->page1, 0xffffffff); 555 size = ~REGLOAD(regs->page1) + 1; 556 if (size < 0x10000000) { 557 dev_err(&ofdev->dev, "BAR1 must be at least 256MByte\n"); 558 return -EIO; 559 } 560 561 /* hardware must support little-endian PCI (byte-twisting) */ 562 if ((REGLOAD(regs->page0) & PAGE0_BTEN) == 0) { 563 dev_err(&ofdev->dev, "byte-twisting is required\n"); 564 return -EIO; 565 } 566 567 priv->regs = regs; 568 priv->irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); 569 dev_info(&ofdev->dev, "host found at 0x%p, irq%d\n", regs, priv->irq); 570 571 /* Find PCI Memory, I/O and Configuration Space Windows */ 572 priv->pci_area = ofdev->resource[1].start; 573 priv->pci_area_end = ofdev->resource[1].end+1; 574 priv->pci_io = ofdev->resource[2].start; 575 priv->pci_conf = ofdev->resource[2].start + 0x10000; 576 priv->pci_conf_end = priv->pci_conf + 0x10000; 577 priv->pci_io_va = (unsigned long)ioremap(priv->pci_io, 0x10000); 578 if (!priv->pci_io_va) { 579 dev_err(&ofdev->dev, "unable to map PCI I/O area\n"); 580 return -EIO; 581 } 582 583 printk(KERN_INFO 584 "GRPCI1: MEMORY SPACE [0x%08lx - 0x%08lx]\n" 585 " I/O SPACE [0x%08lx - 0x%08lx]\n" 586 " CONFIG SPACE [0x%08lx - 0x%08lx]\n", 587 priv->pci_area, priv->pci_area_end-1, 588 priv->pci_io, priv->pci_conf-1, 589 priv->pci_conf, priv->pci_conf_end-1); 590 591 /* 592 * I/O Space resources in I/O Window mapped into Virtual Adr Space 593 * We never use low 4KB because some devices seem have problems using 594 * address 0. 595 */ 596 priv->info.io_space.name = "GRPCI1 PCI I/O Space"; 597 priv->info.io_space.start = priv->pci_io_va + 0x1000; 598 priv->info.io_space.end = priv->pci_io_va + 0x10000 - 1; 599 priv->info.io_space.flags = IORESOURCE_IO; 600 601 /* 602 * grpci1 has no prefetchable memory, map everything as 603 * non-prefetchable memory 604 */ 605 priv->info.mem_space.name = "GRPCI1 PCI MEM Space"; 606 priv->info.mem_space.start = priv->pci_area; 607 priv->info.mem_space.end = priv->pci_area_end - 1; 608 priv->info.mem_space.flags = IORESOURCE_MEM; 609 610 if (request_resource(&iomem_resource, &priv->info.mem_space) < 0) { 611 dev_err(&ofdev->dev, "unable to request PCI memory area\n"); 612 err = -ENOMEM; 613 goto err1; 614 } 615 616 if (request_resource(&ioport_resource, &priv->info.io_space) < 0) { 617 dev_err(&ofdev->dev, "unable to request PCI I/O area\n"); 618 err = -ENOMEM; 619 goto err2; 620 } 621 622 /* setup maximum supported PCI buses */ 623 priv->info.busn.name = "GRPCI1 busn"; 624 priv->info.busn.start = 0; 625 priv->info.busn.end = 15; 626 627 grpci1priv = priv; 628 629 /* Initialize hardware */ 630 grpci1_hw_init(priv); 631 632 /* 633 * Get PCI Interrupt to System IRQ mapping and setup IRQ handling 634 * Error IRQ. All PCI and PCI-Error interrupts are shared using the 635 * same system IRQ. 636 */ 637 leon_update_virq_handling(priv->irq, grpci1_pci_flow_irq, "pcilvl", 0); 638 639 priv->irq_map[0] = grpci1_build_device_irq(1); 640 priv->irq_map[1] = grpci1_build_device_irq(2); 641 priv->irq_map[2] = grpci1_build_device_irq(3); 642 priv->irq_map[3] = grpci1_build_device_irq(4); 643 priv->irq_err = grpci1_build_device_irq(5); 644 645 printk(KERN_INFO " PCI INTA..D#: IRQ%d, IRQ%d, IRQ%d, IRQ%d\n", 646 priv->irq_map[0], priv->irq_map[1], priv->irq_map[2], 647 priv->irq_map[3]); 648 649 /* Enable IRQs on LEON IRQ controller */ 650 err = devm_request_irq(&ofdev->dev, priv->irq, grpci1_jump_interrupt, 0, 651 "GRPCI1_JUMP", priv); 652 if (err) { 653 dev_err(&ofdev->dev, "ERR IRQ request failed: %d\n", err); 654 goto err3; 655 } 656 657 /* Setup IRQ handler for access errors */ 658 err = devm_request_irq(&ofdev->dev, priv->irq_err, 659 grpci1_err_interrupt, IRQF_SHARED, "GRPCI1_ERR", 660 priv); 661 if (err) { 662 dev_err(&ofdev->dev, "ERR VIRQ request failed: %d\n", err); 663 goto err3; 664 } 665 666 tmp = of_get_property(ofdev->dev.of_node, "all_pci_errors", &len); 667 if (tmp && (len == 4)) { 668 priv->pci_err_mask = ALL_PCI_ERRORS; 669 err_mask = IRQ_ALL_ERRORS << IRQ_MASK_BIT; 670 } else { 671 priv->pci_err_mask = DEF_PCI_ERRORS; 672 err_mask = IRQ_DEF_ERRORS << IRQ_MASK_BIT; 673 } 674 675 /* 676 * Enable Error Interrupts. PCI interrupts are unmasked once request_irq 677 * is called by the PCI Device drivers 678 */ 679 REGSTORE(regs->irq, err_mask); 680 681 /* Init common layer and scan buses */ 682 priv->info.ops = &grpci1_ops; 683 priv->info.map_irq = grpci1_map_irq; 684 leon_pci_init(ofdev, &priv->info); 685 686 return 0; 687 688 err3: 689 release_resource(&priv->info.io_space); 690 err2: 691 release_resource(&priv->info.mem_space); 692 err1: 693 iounmap((void __iomem *)priv->pci_io_va); 694 grpci1priv = NULL; 695 return err; 696 } 697 698 static struct of_device_id grpci1_of_match[] = { 699 { 700 .name = "GAISLER_PCIFBRG", 701 }, 702 { 703 .name = "01_014", 704 }, 705 {}, 706 }; 707 708 static struct platform_driver grpci1_of_driver = { 709 .driver = { 710 .name = "grpci1", 711 .of_match_table = grpci1_of_match, 712 }, 713 .probe = grpci1_of_probe, 714 }; 715 716 static int __init grpci1_init(void) 717 { 718 return platform_driver_register(&grpci1_of_driver); 719 } 720 721 subsys_initcall(grpci1_init); 722