1 /* 2 ** DINO manager 3 ** 4 ** (c) Copyright 1999 Red Hat Software 5 ** (c) Copyright 1999 SuSE GmbH 6 ** (c) Copyright 1999,2000 Hewlett-Packard Company 7 ** (c) Copyright 2000 Grant Grundler 8 ** (c) Copyright 2006 Helge Deller 9 ** 10 ** This program is free software; you can redistribute it and/or modify 11 ** it under the terms of the GNU General Public License as published by 12 ** the Free Software Foundation; either version 2 of the License, or 13 ** (at your option) any later version. 14 ** 15 ** This module provides access to Dino PCI bus (config/IOport spaces) 16 ** and helps manage Dino IRQ lines. 17 ** 18 ** Dino interrupt handling is a bit complicated. 19 ** Dino always writes to the broadcast EIR via irr0 for now. 20 ** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!) 21 ** Only one processor interrupt is used for the 11 IRQ line 22 ** inputs to dino. 23 ** 24 ** The different between Built-in Dino and Card-Mode 25 ** dino is in chip initialization and pci device initialization. 26 ** 27 ** Linux drivers can only use Card-Mode Dino if pci devices I/O port 28 ** BARs are configured and used by the driver. Programming MMIO address 29 ** requires substantial knowledge of available Host I/O address ranges 30 ** is currently not supported. Port/Config accessor functions are the 31 ** same. "BIOS" differences are handled within the existing routines. 32 */ 33 34 /* Changes : 35 ** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr) 36 ** - added support for the integrated RS232. 37 */ 38 39 /* 40 ** TODO: create a virtual address for each Dino HPA. 41 ** GSC code might be able to do this since IODC data tells us 42 ** how many pages are used. PCI subsystem could (must?) do this 43 ** for PCI drivers devices which implement/use MMIO registers. 44 */ 45 46 #include <linux/delay.h> 47 #include <linux/types.h> 48 #include <linux/kernel.h> 49 #include <linux/pci.h> 50 #include <linux/init.h> 51 #include <linux/ioport.h> 52 #include <linux/slab.h> 53 #include <linux/interrupt.h> /* for struct irqaction */ 54 #include <linux/spinlock.h> /* for spinlock_t and prototypes */ 55 56 #include <asm/pdc.h> 57 #include <asm/page.h> 58 #include <asm/io.h> 59 #include <asm/hardware.h> 60 61 #include "gsc.h" 62 63 #undef DINO_DEBUG 64 65 #ifdef DINO_DEBUG 66 #define DBG(x...) printk(x) 67 #else 68 #define DBG(x...) 69 #endif 70 71 /* 72 ** Config accessor functions only pass in the 8-bit bus number 73 ** and not the 8-bit "PCI Segment" number. Each Dino will be 74 ** assigned a PCI bus number based on "when" it's discovered. 75 ** 76 ** The "secondary" bus number is set to this before calling 77 ** pci_scan_bus(). If any PPB's are present, the scan will 78 ** discover them and update the "secondary" and "subordinate" 79 ** fields in Dino's pci_bus structure. 80 ** 81 ** Changes in the configuration *will* result in a different 82 ** bus number for each dino. 83 */ 84 85 #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA) 86 #define is_cujo(id) ((id)->hversion == 0x682) 87 88 #define DINO_IAR0 0x004 89 #define DINO_IODC_ADDR 0x008 90 #define DINO_IODC_DATA_0 0x008 91 #define DINO_IODC_DATA_1 0x008 92 #define DINO_IRR0 0x00C 93 #define DINO_IAR1 0x010 94 #define DINO_IRR1 0x014 95 #define DINO_IMR 0x018 96 #define DINO_IPR 0x01C 97 #define DINO_TOC_ADDR 0x020 98 #define DINO_ICR 0x024 99 #define DINO_ILR 0x028 100 #define DINO_IO_COMMAND 0x030 101 #define DINO_IO_STATUS 0x034 102 #define DINO_IO_CONTROL 0x038 103 #define DINO_IO_GSC_ERR_RESP 0x040 104 #define DINO_IO_ERR_INFO 0x044 105 #define DINO_IO_PCI_ERR_RESP 0x048 106 #define DINO_IO_FBB_EN 0x05c 107 #define DINO_IO_ADDR_EN 0x060 108 #define DINO_PCI_ADDR 0x064 109 #define DINO_CONFIG_DATA 0x068 110 #define DINO_IO_DATA 0x06c 111 #define DINO_MEM_DATA 0x070 /* Dino 3.x only */ 112 #define DINO_GSC2X_CONFIG 0x7b4 113 #define DINO_GMASK 0x800 114 #define DINO_PAMR 0x804 115 #define DINO_PAPR 0x808 116 #define DINO_DAMODE 0x80c 117 #define DINO_PCICMD 0x810 118 #define DINO_PCISTS 0x814 119 #define DINO_MLTIM 0x81c 120 #define DINO_BRDG_FEAT 0x820 121 #define DINO_PCIROR 0x824 122 #define DINO_PCIWOR 0x828 123 #define DINO_TLTIM 0x830 124 125 #define DINO_IRQS 11 /* bits 0-10 are architected */ 126 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ 127 #define DINO_LOCAL_IRQS (DINO_IRQS+1) 128 129 #define DINO_MASK_IRQ(x) (1<<(x)) 130 131 #define PCIINTA 0x001 132 #define PCIINTB 0x002 133 #define PCIINTC 0x004 134 #define PCIINTD 0x008 135 #define PCIINTE 0x010 136 #define PCIINTF 0x020 137 #define GSCEXTINT 0x040 138 /* #define xxx 0x080 - bit 7 is "default" */ 139 /* #define xxx 0x100 - bit 8 not used */ 140 /* #define xxx 0x200 - bit 9 not used */ 141 #define RS232INT 0x400 142 143 struct dino_device 144 { 145 struct pci_hba_data hba; /* 'C' inheritance - must be first */ 146 spinlock_t dinosaur_pen; 147 unsigned long txn_addr; /* EIR addr to generate interrupt */ 148 u32 txn_data; /* EIR data assign to each dino */ 149 u32 imr; /* IRQ's which are enabled */ 150 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ 151 #ifdef DINO_DEBUG 152 unsigned int dino_irr0; /* save most recent IRQ line stat */ 153 #endif 154 }; 155 156 /* Looks nice and keeps the compiler happy */ 157 #define DINO_DEV(d) ((struct dino_device *) d) 158 159 160 /* 161 * Dino Configuration Space Accessor Functions 162 */ 163 164 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos))) 165 166 /* 167 * keep the current highest bus count to assist in allocating busses. This 168 * tries to keep a global bus count total so that when we discover an 169 * entirely new bus, it can be given a unique bus number. 170 */ 171 static int dino_current_bus = 0; 172 173 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where, 174 int size, u32 *val) 175 { 176 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 177 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; 178 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 179 void __iomem *base_addr = d->hba.base_addr; 180 unsigned long flags; 181 182 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 183 size); 184 spin_lock_irqsave(&d->dinosaur_pen, flags); 185 186 /* tell HW which CFG address */ 187 __raw_writel(v, base_addr + DINO_PCI_ADDR); 188 189 /* generate cfg read cycle */ 190 if (size == 1) { 191 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3)); 192 } else if (size == 2) { 193 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2)); 194 } else if (size == 4) { 195 *val = readl(base_addr + DINO_CONFIG_DATA); 196 } 197 198 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 199 return 0; 200 } 201 202 /* 203 * Dino address stepping "feature": 204 * When address stepping, Dino attempts to drive the bus one cycle too soon 205 * even though the type of cycle (config vs. MMIO) might be different. 206 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping. 207 */ 208 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where, 209 int size, u32 val) 210 { 211 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 212 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; 213 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 214 void __iomem *base_addr = d->hba.base_addr; 215 unsigned long flags; 216 217 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 218 size); 219 spin_lock_irqsave(&d->dinosaur_pen, flags); 220 221 /* avoid address stepping feature */ 222 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR); 223 __raw_readl(base_addr + DINO_CONFIG_DATA); 224 225 /* tell HW which CFG address */ 226 __raw_writel(v, base_addr + DINO_PCI_ADDR); 227 /* generate cfg read cycle */ 228 if (size == 1) { 229 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3)); 230 } else if (size == 2) { 231 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2)); 232 } else if (size == 4) { 233 writel(val, base_addr + DINO_CONFIG_DATA); 234 } 235 236 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 237 return 0; 238 } 239 240 static struct pci_ops dino_cfg_ops = { 241 .read = dino_cfg_read, 242 .write = dino_cfg_write, 243 }; 244 245 246 /* 247 * Dino "I/O Port" Space Accessor Functions 248 * 249 * Many PCI devices don't require use of I/O port space (eg Tulip, 250 * NCR720) since they export the same registers to both MMIO and 251 * I/O port space. Performance is going to stink if drivers use 252 * I/O port instead of MMIO. 253 */ 254 255 #define DINO_PORT_IN(type, size, mask) \ 256 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \ 257 { \ 258 u##size v; \ 259 unsigned long flags; \ 260 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 261 /* tell HW which IO Port address */ \ 262 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 263 /* generate I/O PORT read cycle */ \ 264 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \ 265 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 266 return v; \ 267 } 268 269 DINO_PORT_IN(b, 8, 3) 270 DINO_PORT_IN(w, 16, 2) 271 DINO_PORT_IN(l, 32, 0) 272 273 #define DINO_PORT_OUT(type, size, mask) \ 274 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \ 275 { \ 276 unsigned long flags; \ 277 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 278 /* tell HW which IO port address */ \ 279 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 280 /* generate cfg write cycle */ \ 281 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \ 282 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 283 } 284 285 DINO_PORT_OUT(b, 8, 3) 286 DINO_PORT_OUT(w, 16, 2) 287 DINO_PORT_OUT(l, 32, 0) 288 289 static struct pci_port_ops dino_port_ops = { 290 .inb = dino_in8, 291 .inw = dino_in16, 292 .inl = dino_in32, 293 .outb = dino_out8, 294 .outw = dino_out16, 295 .outl = dino_out32 296 }; 297 298 static void dino_mask_irq(struct irq_data *d) 299 { 300 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); 301 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 302 303 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq); 304 305 /* Clear the matching bit in the IMR register */ 306 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq)); 307 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 308 } 309 310 static void dino_unmask_irq(struct irq_data *d) 311 { 312 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); 313 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 314 u32 tmp; 315 316 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq); 317 318 /* 319 ** clear pending IRQ bits 320 ** 321 ** This does NOT change ILR state! 322 ** See comment below for ILR usage. 323 */ 324 __raw_readl(dino_dev->hba.base_addr+DINO_IPR); 325 326 /* set the matching bit in the IMR register */ 327 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */ 328 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 329 330 /* Emulate "Level Triggered" Interrupt 331 ** Basically, a driver is blowing it if the IRQ line is asserted 332 ** while the IRQ is disabled. But tulip.c seems to do that.... 333 ** Give 'em a kluge award and a nice round of applause! 334 ** 335 ** The gsc_write will generate an interrupt which invokes dino_isr(). 336 ** dino_isr() will read IPR and find nothing. But then catch this 337 ** when it also checks ILR. 338 */ 339 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR); 340 if (tmp & DINO_MASK_IRQ(local_irq)) { 341 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", 342 __func__, tmp); 343 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr); 344 } 345 } 346 347 static struct irq_chip dino_interrupt_type = { 348 .name = "GSC-PCI", 349 .irq_unmask = dino_unmask_irq, 350 .irq_mask = dino_mask_irq, 351 }; 352 353 354 /* 355 * Handle a Processor interrupt generated by Dino. 356 * 357 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from 358 * wedging the CPU. Could be removed or made optional at some point. 359 */ 360 static irqreturn_t dino_isr(int irq, void *intr_dev) 361 { 362 struct dino_device *dino_dev = intr_dev; 363 u32 mask; 364 int ilr_loop = 100; 365 366 /* read and acknowledge pending interrupts */ 367 #ifdef DINO_DEBUG 368 dino_dev->dino_irr0 = 369 #endif 370 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK; 371 372 if (mask == 0) 373 return IRQ_NONE; 374 375 ilr_again: 376 do { 377 int local_irq = __ffs(mask); 378 int irq = dino_dev->global_irq[local_irq]; 379 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n", 380 __func__, irq, intr_dev, mask); 381 generic_handle_irq(irq); 382 mask &= ~(1 << local_irq); 383 } while (mask); 384 385 /* Support for level triggered IRQ lines. 386 ** 387 ** Dropping this support would make this routine *much* faster. 388 ** But since PCI requires level triggered IRQ line to share lines... 389 ** device drivers may assume lines are level triggered (and not 390 ** edge triggered like EISA/ISA can be). 391 */ 392 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr; 393 if (mask) { 394 if (--ilr_loop > 0) 395 goto ilr_again; 396 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n", 397 dino_dev->hba.base_addr, mask); 398 return IRQ_NONE; 399 } 400 return IRQ_HANDLED; 401 } 402 403 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp) 404 { 405 int irq = gsc_assign_irq(&dino_interrupt_type, dino); 406 if (irq == NO_IRQ) 407 return; 408 409 *irqp = irq; 410 dino->global_irq[local_irq] = irq; 411 } 412 413 static void dino_choose_irq(struct parisc_device *dev, void *ctrl) 414 { 415 int irq; 416 struct dino_device *dino = ctrl; 417 418 switch (dev->id.sversion) { 419 case 0x00084: irq = 8; break; /* PS/2 */ 420 case 0x0008c: irq = 10; break; /* RS232 */ 421 case 0x00096: irq = 8; break; /* PS/2 */ 422 default: return; /* Unknown */ 423 } 424 425 dino_assign_irq(dino, irq, &dev->irq); 426 } 427 428 429 /* 430 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de) 431 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...) 432 */ 433 static void quirk_cirrus_cardbus(struct pci_dev *dev) 434 { 435 u8 new_irq = dev->irq - 1; 436 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n", 437 pci_name(dev), dev->irq, new_irq); 438 dev->irq = new_irq; 439 } 440 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus ); 441 442 443 static void __init 444 dino_bios_init(void) 445 { 446 DBG("dino_bios_init\n"); 447 } 448 449 /* 450 * dino_card_setup - Set up the memory space for a Dino in card mode. 451 * @bus: the bus under this dino 452 * 453 * Claim an 8MB chunk of unused IO space and call the generic PCI routines 454 * to set up the addresses of the devices on this bus. 455 */ 456 #define _8MB 0x00800000UL 457 static void __init 458 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr) 459 { 460 int i; 461 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 462 struct resource *res; 463 char name[128]; 464 int size; 465 466 res = &dino_dev->hba.lmmio_space; 467 res->flags = IORESOURCE_MEM; 468 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", 469 dev_name(bus->bridge)); 470 res->name = kmalloc(size+1, GFP_KERNEL); 471 if(res->name) 472 strcpy((char *)res->name, name); 473 else 474 res->name = dino_dev->hba.lmmio_space.name; 475 476 477 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB, 478 F_EXTEND(0xf0000000UL) | _8MB, 479 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) { 480 struct pci_dev *dev, *tmp; 481 482 printk(KERN_ERR "Dino: cannot attach bus %s\n", 483 dev_name(bus->bridge)); 484 /* kill the bus, we can't do anything with it */ 485 list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) { 486 list_del(&dev->bus_list); 487 } 488 489 return; 490 } 491 bus->resource[1] = res; 492 bus->resource[0] = &(dino_dev->hba.io_space); 493 494 /* Now tell dino what range it has */ 495 for (i = 1; i < 31; i++) { 496 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB))) 497 break; 498 } 499 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", 500 i, res->start, base_addr + DINO_IO_ADDR_EN); 501 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN); 502 } 503 504 static void __init 505 dino_card_fixup(struct pci_dev *dev) 506 { 507 u32 irq_pin; 508 509 /* 510 ** REVISIT: card-mode PCI-PCI expansion chassis do exist. 511 ** Not sure they were ever productized. 512 ** Die here since we'll die later in dino_inb() anyway. 513 */ 514 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 515 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n"); 516 } 517 518 /* 519 ** Set Latency Timer to 0xff (not a shared bus) 520 ** Set CACHELINE_SIZE. 521 */ 522 dino_cfg_write(dev->bus, dev->devfn, 523 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); 524 525 /* 526 ** Program INT_LINE for card-mode devices. 527 ** The cards are hardwired according to this algorithm. 528 ** And it doesn't matter if PPB's are present or not since 529 ** the IRQ lines bypass the PPB. 530 ** 531 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range. 532 ** The additional "-1" adjusts for skewing the IRQ<->slot. 533 */ 534 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin); 535 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 536 537 /* Shouldn't really need to do this but it's in case someone tries 538 ** to bypass PCI services and look at the card themselves. 539 */ 540 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); 541 } 542 543 /* The alignment contraints for PCI bridges under dino */ 544 #define DINO_BRIDGE_ALIGN 0x100000 545 546 547 static void __init 548 dino_fixup_bus(struct pci_bus *bus) 549 { 550 struct pci_dev *dev; 551 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 552 553 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n", 554 __func__, bus, bus->busn_res.start, 555 bus->bridge->platform_data); 556 557 /* Firmware doesn't set up card-mode dino, so we have to */ 558 if (is_card_dino(&dino_dev->hba.dev->id)) { 559 dino_card_setup(bus, dino_dev->hba.base_addr); 560 } else if (bus->parent) { 561 int i; 562 563 pci_read_bridge_bases(bus); 564 565 566 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { 567 if((bus->self->resource[i].flags & 568 (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 569 continue; 570 571 if(bus->self->resource[i].flags & IORESOURCE_MEM) { 572 /* There's a quirk to alignment of 573 * bridge memory resources: the start 574 * is the alignment and start-end is 575 * the size. However, firmware will 576 * have assigned start and end, so we 577 * need to take this into account */ 578 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN; 579 bus->self->resource[i].start = DINO_BRIDGE_ALIGN; 580 581 } 582 583 DBG("DEBUG %s assigning %d [%pR]\n", 584 dev_name(&bus->self->dev), i, 585 &bus->self->resource[i]); 586 WARN_ON(pci_assign_resource(bus->self, i)); 587 DBG("DEBUG %s after assign %d [%pR]\n", 588 dev_name(&bus->self->dev), i, 589 &bus->self->resource[i]); 590 } 591 } 592 593 594 list_for_each_entry(dev, &bus->devices, bus_list) { 595 if (is_card_dino(&dino_dev->hba.dev->id)) 596 dino_card_fixup(dev); 597 598 /* 599 ** P2PB's only have 2 BARs, no IRQs. 600 ** I'd like to just ignore them for now. 601 */ 602 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) 603 continue; 604 605 /* null out the ROM resource if there is one (we don't 606 * care about an expansion rom on parisc, since it 607 * usually contains (x86) bios code) */ 608 dev->resource[PCI_ROM_RESOURCE].flags = 0; 609 610 if(dev->irq == 255) { 611 612 #define DINO_FIX_UNASSIGNED_INTERRUPTS 613 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS 614 615 /* This code tries to assign an unassigned 616 * interrupt. Leave it disabled unless you 617 * *really* know what you're doing since the 618 * pin<->interrupt line mapping varies by bus 619 * and machine */ 620 621 u32 irq_pin; 622 623 dino_cfg_read(dev->bus, dev->devfn, 624 PCI_INTERRUPT_PIN, 1, &irq_pin); 625 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 626 printk(KERN_WARNING "Device %s has undefined IRQ, " 627 "setting to %d\n", pci_name(dev), irq_pin); 628 dino_cfg_write(dev->bus, dev->devfn, 629 PCI_INTERRUPT_LINE, 1, irq_pin); 630 dino_assign_irq(dino_dev, irq_pin, &dev->irq); 631 #else 632 dev->irq = 65535; 633 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev)); 634 #endif 635 } else { 636 /* Adjust INT_LINE for that busses region */ 637 dino_assign_irq(dino_dev, dev->irq, &dev->irq); 638 } 639 } 640 } 641 642 643 static struct pci_bios_ops dino_bios_ops = { 644 .init = dino_bios_init, 645 .fixup_bus = dino_fixup_bus 646 }; 647 648 649 /* 650 * Initialise a DINO controller chip 651 */ 652 static void __init 653 dino_card_init(struct dino_device *dino_dev) 654 { 655 u32 brdg_feat = 0x00784e05; 656 unsigned long status; 657 658 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS); 659 if (status & 0x0000ff80) { 660 __raw_writel(0x00000005, 661 dino_dev->hba.base_addr+DINO_IO_COMMAND); 662 udelay(1); 663 } 664 665 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK); 666 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN); 667 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR); 668 669 #if 1 670 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */ 671 /* 672 ** PCX-L processors don't support XQL like Dino wants it. 673 ** PCX-L2 ignore XQL signal and it doesn't matter. 674 */ 675 brdg_feat &= ~0x4; /* UXQL */ 676 #endif 677 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT); 678 679 /* 680 ** Don't enable address decoding until we know which I/O range 681 ** currently is available from the host. Only affects MMIO 682 ** and not I/O port space. 683 */ 684 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN); 685 686 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE); 687 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR); 688 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR); 689 690 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM); 691 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL); 692 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM); 693 694 /* Disable PAMR before writing PAPR */ 695 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR); 696 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR); 697 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR); 698 699 /* 700 ** Dino ERS encourages enabling FBB (0x6f). 701 ** We can't until we know *all* devices below us can support it. 702 ** (Something in device configuration header tells us). 703 */ 704 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD); 705 706 /* Somewhere, the PCI spec says give devices 1 second 707 ** to recover from the #RESET being de-asserted. 708 ** Experience shows most devices only need 10ms. 709 ** This short-cut speeds up booting significantly. 710 */ 711 mdelay(pci_post_reset_delay); 712 } 713 714 static int __init 715 dino_bridge_init(struct dino_device *dino_dev, const char *name) 716 { 717 unsigned long io_addr; 718 int result, i, count=0; 719 struct resource *res, *prevres = NULL; 720 /* 721 * Decoding IO_ADDR_EN only works for Built-in Dino 722 * since PDC has already initialized this. 723 */ 724 725 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN); 726 if (io_addr == 0) { 727 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name); 728 return -ENODEV; 729 } 730 731 res = &dino_dev->hba.lmmio_space; 732 for (i = 0; i < 32; i++) { 733 unsigned long start, end; 734 735 if((io_addr & (1 << i)) == 0) 736 continue; 737 738 start = F_EXTEND(0xf0000000UL) | (i << 23); 739 end = start + 8 * 1024 * 1024 - 1; 740 741 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count, 742 start, end); 743 744 if(prevres && prevres->end + 1 == start) { 745 prevres->end = end; 746 } else { 747 if(count >= DINO_MAX_LMMIO_RESOURCES) { 748 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end); 749 break; 750 } 751 prevres = res; 752 res->start = start; 753 res->end = end; 754 res->flags = IORESOURCE_MEM; 755 res->name = kmalloc(64, GFP_KERNEL); 756 if(res->name) 757 snprintf((char *)res->name, 64, "%s LMMIO %d", 758 name, count); 759 res++; 760 count++; 761 } 762 } 763 764 res = &dino_dev->hba.lmmio_space; 765 766 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { 767 if(res[i].flags == 0) 768 break; 769 770 result = ccio_request_resource(dino_dev->hba.dev, &res[i]); 771 if (result < 0) { 772 printk(KERN_ERR "%s: failed to claim PCI Bus address " 773 "space %d (%pR)!\n", name, i, &res[i]); 774 return result; 775 } 776 } 777 return 0; 778 } 779 780 static int __init dino_common_init(struct parisc_device *dev, 781 struct dino_device *dino_dev, const char *name) 782 { 783 int status; 784 u32 eim; 785 struct gsc_irq gsc_irq; 786 struct resource *res; 787 788 pcibios_register_hba(&dino_dev->hba); 789 790 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */ 791 pci_port = &dino_port_ops; 792 793 /* 794 ** Note: SMP systems can make use of IRR1/IAR1 registers 795 ** But it won't buy much performance except in very 796 ** specific applications/configurations. Note Dino 797 ** still only has 11 IRQ input lines - just map some of them 798 ** to a different processor. 799 */ 800 dev->irq = gsc_alloc_irq(&gsc_irq); 801 dino_dev->txn_addr = gsc_irq.txn_addr; 802 dino_dev->txn_data = gsc_irq.txn_data; 803 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; 804 805 /* 806 ** Dino needs a PA "IRQ" to get a processor's attention. 807 ** arch/parisc/kernel/irq.c returns an EIRR bit. 808 */ 809 if (dev->irq < 0) { 810 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name); 811 return 1; 812 } 813 814 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev); 815 if (status) { 816 printk(KERN_WARNING "%s: request_irq() failed with %d\n", 817 name, status); 818 return 1; 819 } 820 821 /* Support the serial port which is sometimes attached on built-in 822 * Dino / Cujo chips. 823 */ 824 825 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq); 826 827 /* 828 ** This enables DINO to generate interrupts when it sees 829 ** any of its inputs *change*. Just asserting an IRQ 830 ** before it's enabled (ie unmasked) isn't good enough. 831 */ 832 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); 833 834 /* 835 ** Some platforms don't clear Dino's IRR0 register at boot time. 836 ** Reading will clear it now. 837 */ 838 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0); 839 840 /* allocate I/O Port resource region */ 841 res = &dino_dev->hba.io_space; 842 if (!is_cujo(&dev->id)) { 843 res->name = "Dino I/O Port"; 844 } else { 845 res->name = "Cujo I/O Port"; 846 } 847 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num); 848 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1); 849 res->flags = IORESOURCE_IO; /* do not mark it busy ! */ 850 if (request_resource(&ioport_resource, res) < 0) { 851 printk(KERN_ERR "%s: request I/O Port region failed " 852 "0x%lx/%lx (hpa 0x%p)\n", 853 name, (unsigned long)res->start, (unsigned long)res->end, 854 dino_dev->hba.base_addr); 855 return 1; 856 } 857 858 return 0; 859 } 860 861 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) 862 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) 863 #define CUJO_RAVEN_BADPAGE 0x01003000UL 864 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL 865 866 static const char *dino_vers[] = { 867 "2.0", 868 "2.1", 869 "3.0", 870 "3.1" 871 }; 872 873 static const char *cujo_vers[] = { 874 "1.0", 875 "2.0" 876 }; 877 878 void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); 879 880 /* 881 ** Determine if dino should claim this chip (return 0) or not (return 1). 882 ** If so, initialize the chip appropriately (card-mode vs bridge mode). 883 ** Much of the initialization is common though. 884 */ 885 static int __init dino_probe(struct parisc_device *dev) 886 { 887 struct dino_device *dino_dev; // Dino specific control struct 888 const char *version = "unknown"; 889 char *name; 890 int is_cujo = 0; 891 LIST_HEAD(resources); 892 struct pci_bus *bus; 893 unsigned long hpa = dev->hpa.start; 894 int max; 895 896 name = "Dino"; 897 if (is_card_dino(&dev->id)) { 898 version = "3.x (card mode)"; 899 } else { 900 if (!is_cujo(&dev->id)) { 901 if (dev->id.hversion_rev < 4) { 902 version = dino_vers[dev->id.hversion_rev]; 903 } 904 } else { 905 name = "Cujo"; 906 is_cujo = 1; 907 if (dev->id.hversion_rev < 2) { 908 version = cujo_vers[dev->id.hversion_rev]; 909 } 910 } 911 } 912 913 printk("%s version %s found at 0x%lx\n", name, version, hpa); 914 915 if (!request_mem_region(hpa, PAGE_SIZE, name)) { 916 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n", 917 hpa); 918 return 1; 919 } 920 921 /* Check for bugs */ 922 if (is_cujo && dev->id.hversion_rev == 1) { 923 #ifdef CONFIG_IOMMU_CCIO 924 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); 925 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { 926 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); 927 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { 928 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); 929 } else { 930 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa); 931 } 932 #endif 933 } else if (!is_cujo && !is_card_dino(&dev->id) && 934 dev->id.hversion_rev < 3) { 935 printk(KERN_WARNING 936 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" 937 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" 938 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" 939 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", 940 dev->id.hversion_rev); 941 /* REVISIT: why are C200/C240 listed in the README table but not 942 ** "Models affected"? Could be an omission in the original literature. 943 */ 944 } 945 946 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); 947 if (!dino_dev) { 948 printk("dino_init_chip - couldn't alloc dino_device\n"); 949 return 1; 950 } 951 952 dino_dev->hba.dev = dev; 953 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096); 954 dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */ 955 spin_lock_init(&dino_dev->dinosaur_pen); 956 dino_dev->hba.iommu = ccio_get_iommu(dev); 957 958 if (is_card_dino(&dev->id)) { 959 dino_card_init(dino_dev); 960 } else { 961 dino_bridge_init(dino_dev, name); 962 } 963 964 if (dino_common_init(dev, dino_dev, name)) 965 return 1; 966 967 dev->dev.platform_data = dino_dev; 968 969 pci_add_resource_offset(&resources, &dino_dev->hba.io_space, 970 HBA_PORT_BASE(dino_dev->hba.hba_num)); 971 if (dino_dev->hba.lmmio_space.flags) 972 pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space, 973 dino_dev->hba.lmmio_space_offset); 974 if (dino_dev->hba.elmmio_space.flags) 975 pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space, 976 dino_dev->hba.lmmio_space_offset); 977 if (dino_dev->hba.gmmio_space.flags) 978 pci_add_resource(&resources, &dino_dev->hba.gmmio_space); 979 980 dino_dev->hba.bus_num.start = dino_current_bus; 981 dino_dev->hba.bus_num.end = 255; 982 dino_dev->hba.bus_num.flags = IORESOURCE_BUS; 983 pci_add_resource(&resources, &dino_dev->hba.bus_num); 984 /* 985 ** It's not used to avoid chicken/egg problems 986 ** with configuration accessor functions. 987 */ 988 dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev, 989 dino_current_bus, &dino_cfg_ops, NULL, &resources); 990 if (!bus) { 991 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n", 992 dev_name(&dev->dev), dino_current_bus); 993 pci_free_resource_list(&resources); 994 /* increment the bus number in case of duplicates */ 995 dino_current_bus++; 996 return 0; 997 } 998 999 max = pci_scan_child_bus(bus); 1000 pci_bus_update_busn_res_end(bus, max); 1001 1002 /* This code *depends* on scanning being single threaded 1003 * if it isn't, this global bus number count will fail 1004 */ 1005 dino_current_bus = max + 1; 1006 pci_bus_assign_resources(bus); 1007 pci_bus_add_devices(bus); 1008 return 0; 1009 } 1010 1011 /* 1012 * Normally, we would just test sversion. But the Elroy PCI adapter has 1013 * the same sversion as Dino, so we have to check hversion as well. 1014 * Unfortunately, the J2240 PDC reports the wrong hversion for the first 1015 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. 1016 * For card-mode Dino, most machines report an sversion of 9D. But 715 1017 * and 725 firmware misreport it as 0x08080 for no adequately explained 1018 * reason. 1019 */ 1020 static struct parisc_device_id dino_tbl[] = { 1021 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ 1022 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ 1023 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ 1024 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ 1025 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ 1026 { 0, } 1027 }; 1028 1029 static struct parisc_driver dino_driver = { 1030 .name = "dino", 1031 .id_table = dino_tbl, 1032 .probe = dino_probe, 1033 }; 1034 1035 /* 1036 * One time initialization to let the world know Dino is here. 1037 * This is the only routine which is NOT static. 1038 * Must be called exactly once before pci_init(). 1039 */ 1040 int __init dino_init(void) 1041 { 1042 register_parisc_driver(&dino_driver); 1043 return 0; 1044 } 1045 1046