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/system.h> 59 #include <asm/io.h> 60 #include <asm/hardware.h> 61 62 #include "gsc.h" 63 64 #undef DINO_DEBUG 65 66 #ifdef DINO_DEBUG 67 #define DBG(x...) printk(x) 68 #else 69 #define DBG(x...) 70 #endif 71 72 /* 73 ** Config accessor functions only pass in the 8-bit bus number 74 ** and not the 8-bit "PCI Segment" number. Each Dino will be 75 ** assigned a PCI bus number based on "when" it's discovered. 76 ** 77 ** The "secondary" bus number is set to this before calling 78 ** pci_scan_bus(). If any PPB's are present, the scan will 79 ** discover them and update the "secondary" and "subordinate" 80 ** fields in Dino's pci_bus structure. 81 ** 82 ** Changes in the configuration *will* result in a different 83 ** bus number for each dino. 84 */ 85 86 #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA) 87 #define is_cujo(id) ((id)->hversion == 0x682) 88 89 #define DINO_IAR0 0x004 90 #define DINO_IODC_ADDR 0x008 91 #define DINO_IODC_DATA_0 0x008 92 #define DINO_IODC_DATA_1 0x008 93 #define DINO_IRR0 0x00C 94 #define DINO_IAR1 0x010 95 #define DINO_IRR1 0x014 96 #define DINO_IMR 0x018 97 #define DINO_IPR 0x01C 98 #define DINO_TOC_ADDR 0x020 99 #define DINO_ICR 0x024 100 #define DINO_ILR 0x028 101 #define DINO_IO_COMMAND 0x030 102 #define DINO_IO_STATUS 0x034 103 #define DINO_IO_CONTROL 0x038 104 #define DINO_IO_GSC_ERR_RESP 0x040 105 #define DINO_IO_ERR_INFO 0x044 106 #define DINO_IO_PCI_ERR_RESP 0x048 107 #define DINO_IO_FBB_EN 0x05c 108 #define DINO_IO_ADDR_EN 0x060 109 #define DINO_PCI_ADDR 0x064 110 #define DINO_CONFIG_DATA 0x068 111 #define DINO_IO_DATA 0x06c 112 #define DINO_MEM_DATA 0x070 /* Dino 3.x only */ 113 #define DINO_GSC2X_CONFIG 0x7b4 114 #define DINO_GMASK 0x800 115 #define DINO_PAMR 0x804 116 #define DINO_PAPR 0x808 117 #define DINO_DAMODE 0x80c 118 #define DINO_PCICMD 0x810 119 #define DINO_PCISTS 0x814 120 #define DINO_MLTIM 0x81c 121 #define DINO_BRDG_FEAT 0x820 122 #define DINO_PCIROR 0x824 123 #define DINO_PCIWOR 0x828 124 #define DINO_TLTIM 0x830 125 126 #define DINO_IRQS 11 /* bits 0-10 are architected */ 127 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ 128 #define DINO_LOCAL_IRQS (DINO_IRQS+1) 129 130 #define DINO_MASK_IRQ(x) (1<<(x)) 131 132 #define PCIINTA 0x001 133 #define PCIINTB 0x002 134 #define PCIINTC 0x004 135 #define PCIINTD 0x008 136 #define PCIINTE 0x010 137 #define PCIINTF 0x020 138 #define GSCEXTINT 0x040 139 /* #define xxx 0x080 - bit 7 is "default" */ 140 /* #define xxx 0x100 - bit 8 not used */ 141 /* #define xxx 0x200 - bit 9 not used */ 142 #define RS232INT 0x400 143 144 struct dino_device 145 { 146 struct pci_hba_data hba; /* 'C' inheritance - must be first */ 147 spinlock_t dinosaur_pen; 148 unsigned long txn_addr; /* EIR addr to generate interrupt */ 149 u32 txn_data; /* EIR data assign to each dino */ 150 u32 imr; /* IRQ's which are enabled */ 151 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ 152 #ifdef DINO_DEBUG 153 unsigned int dino_irr0; /* save most recent IRQ line stat */ 154 #endif 155 }; 156 157 /* Looks nice and keeps the compiler happy */ 158 #define DINO_DEV(d) ((struct dino_device *) d) 159 160 161 /* 162 * Dino Configuration Space Accessor Functions 163 */ 164 165 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos))) 166 167 /* 168 * keep the current highest bus count to assist in allocating busses. This 169 * tries to keep a global bus count total so that when we discover an 170 * entirely new bus, it can be given a unique bus number. 171 */ 172 static int dino_current_bus = 0; 173 174 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where, 175 int size, u32 *val) 176 { 177 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 178 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary; 179 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 180 void __iomem *base_addr = d->hba.base_addr; 181 unsigned long flags; 182 183 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 184 size); 185 spin_lock_irqsave(&d->dinosaur_pen, flags); 186 187 /* tell HW which CFG address */ 188 __raw_writel(v, base_addr + DINO_PCI_ADDR); 189 190 /* generate cfg read cycle */ 191 if (size == 1) { 192 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3)); 193 } else if (size == 2) { 194 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2)); 195 } else if (size == 4) { 196 *val = readl(base_addr + DINO_CONFIG_DATA); 197 } 198 199 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 200 return 0; 201 } 202 203 /* 204 * Dino address stepping "feature": 205 * When address stepping, Dino attempts to drive the bus one cycle too soon 206 * even though the type of cycle (config vs. MMIO) might be different. 207 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping. 208 */ 209 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where, 210 int size, u32 val) 211 { 212 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 213 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary; 214 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 215 void __iomem *base_addr = d->hba.base_addr; 216 unsigned long flags; 217 218 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 219 size); 220 spin_lock_irqsave(&d->dinosaur_pen, flags); 221 222 /* avoid address stepping feature */ 223 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR); 224 __raw_readl(base_addr + DINO_CONFIG_DATA); 225 226 /* tell HW which CFG address */ 227 __raw_writel(v, base_addr + DINO_PCI_ADDR); 228 /* generate cfg read cycle */ 229 if (size == 1) { 230 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3)); 231 } else if (size == 2) { 232 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2)); 233 } else if (size == 4) { 234 writel(val, base_addr + DINO_CONFIG_DATA); 235 } 236 237 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 238 return 0; 239 } 240 241 static struct pci_ops dino_cfg_ops = { 242 .read = dino_cfg_read, 243 .write = dino_cfg_write, 244 }; 245 246 247 /* 248 * Dino "I/O Port" Space Accessor Functions 249 * 250 * Many PCI devices don't require use of I/O port space (eg Tulip, 251 * NCR720) since they export the same registers to both MMIO and 252 * I/O port space. Performance is going to stink if drivers use 253 * I/O port instead of MMIO. 254 */ 255 256 #define DINO_PORT_IN(type, size, mask) \ 257 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \ 258 { \ 259 u##size v; \ 260 unsigned long flags; \ 261 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 262 /* tell HW which IO Port address */ \ 263 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 264 /* generate I/O PORT read cycle */ \ 265 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \ 266 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 267 return v; \ 268 } 269 270 DINO_PORT_IN(b, 8, 3) 271 DINO_PORT_IN(w, 16, 2) 272 DINO_PORT_IN(l, 32, 0) 273 274 #define DINO_PORT_OUT(type, size, mask) \ 275 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \ 276 { \ 277 unsigned long flags; \ 278 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 279 /* tell HW which IO port address */ \ 280 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 281 /* generate cfg write cycle */ \ 282 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \ 283 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 284 } 285 286 DINO_PORT_OUT(b, 8, 3) 287 DINO_PORT_OUT(w, 16, 2) 288 DINO_PORT_OUT(l, 32, 0) 289 290 static struct pci_port_ops dino_port_ops = { 291 .inb = dino_in8, 292 .inw = dino_in16, 293 .inl = dino_in32, 294 .outb = dino_out8, 295 .outw = dino_out16, 296 .outl = dino_out32 297 }; 298 299 static void dino_disable_irq(unsigned int irq) 300 { 301 struct irq_desc *desc = irq_to_desc(irq); 302 struct dino_device *dino_dev = desc->chip_data; 303 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 304 305 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq); 306 307 /* Clear the matching bit in the IMR register */ 308 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq)); 309 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 310 } 311 312 static void dino_enable_irq(unsigned int irq) 313 { 314 struct irq_desc *desc = irq_to_desc(irq); 315 struct dino_device *dino_dev = desc->chip_data; 316 int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 317 u32 tmp; 318 319 DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq); 320 321 /* 322 ** clear pending IRQ bits 323 ** 324 ** This does NOT change ILR state! 325 ** See comment below for ILR usage. 326 */ 327 __raw_readl(dino_dev->hba.base_addr+DINO_IPR); 328 329 /* set the matching bit in the IMR register */ 330 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */ 331 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 332 333 /* Emulate "Level Triggered" Interrupt 334 ** Basically, a driver is blowing it if the IRQ line is asserted 335 ** while the IRQ is disabled. But tulip.c seems to do that.... 336 ** Give 'em a kluge award and a nice round of applause! 337 ** 338 ** The gsc_write will generate an interrupt which invokes dino_isr(). 339 ** dino_isr() will read IPR and find nothing. But then catch this 340 ** when it also checks ILR. 341 */ 342 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR); 343 if (tmp & DINO_MASK_IRQ(local_irq)) { 344 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", 345 __func__, tmp); 346 gsc_writel(dino_dev->txn_data, dino_dev->txn_addr); 347 } 348 } 349 350 static unsigned int dino_startup_irq(unsigned int irq) 351 { 352 dino_enable_irq(irq); 353 return 0; 354 } 355 356 static struct irq_chip dino_interrupt_type = { 357 .name = "GSC-PCI", 358 .startup = dino_startup_irq, 359 .shutdown = dino_disable_irq, 360 .enable = dino_enable_irq, 361 .disable = dino_disable_irq, 362 .ack = no_ack_irq, 363 .end = no_end_irq, 364 }; 365 366 367 /* 368 * Handle a Processor interrupt generated by Dino. 369 * 370 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from 371 * wedging the CPU. Could be removed or made optional at some point. 372 */ 373 static irqreturn_t dino_isr(int irq, void *intr_dev) 374 { 375 struct dino_device *dino_dev = intr_dev; 376 u32 mask; 377 int ilr_loop = 100; 378 379 /* read and acknowledge pending interrupts */ 380 #ifdef DINO_DEBUG 381 dino_dev->dino_irr0 = 382 #endif 383 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK; 384 385 if (mask == 0) 386 return IRQ_NONE; 387 388 ilr_again: 389 do { 390 int local_irq = __ffs(mask); 391 int irq = dino_dev->global_irq[local_irq]; 392 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n", 393 __func__, irq, intr_dev, mask); 394 __do_IRQ(irq); 395 mask &= ~(1 << local_irq); 396 } while (mask); 397 398 /* Support for level triggered IRQ lines. 399 ** 400 ** Dropping this support would make this routine *much* faster. 401 ** But since PCI requires level triggered IRQ line to share lines... 402 ** device drivers may assume lines are level triggered (and not 403 ** edge triggered like EISA/ISA can be). 404 */ 405 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr; 406 if (mask) { 407 if (--ilr_loop > 0) 408 goto ilr_again; 409 printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n", 410 dino_dev->hba.base_addr, mask); 411 return IRQ_NONE; 412 } 413 return IRQ_HANDLED; 414 } 415 416 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp) 417 { 418 int irq = gsc_assign_irq(&dino_interrupt_type, dino); 419 if (irq == NO_IRQ) 420 return; 421 422 *irqp = irq; 423 dino->global_irq[local_irq] = irq; 424 } 425 426 static void dino_choose_irq(struct parisc_device *dev, void *ctrl) 427 { 428 int irq; 429 struct dino_device *dino = ctrl; 430 431 switch (dev->id.sversion) { 432 case 0x00084: irq = 8; break; /* PS/2 */ 433 case 0x0008c: irq = 10; break; /* RS232 */ 434 case 0x00096: irq = 8; break; /* PS/2 */ 435 default: return; /* Unknown */ 436 } 437 438 dino_assign_irq(dino, irq, &dev->irq); 439 } 440 441 442 /* 443 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de) 444 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...) 445 */ 446 static void __devinit quirk_cirrus_cardbus(struct pci_dev *dev) 447 { 448 u8 new_irq = dev->irq - 1; 449 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n", 450 pci_name(dev), dev->irq, new_irq); 451 dev->irq = new_irq; 452 } 453 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus ); 454 455 456 static void __init 457 dino_bios_init(void) 458 { 459 DBG("dino_bios_init\n"); 460 } 461 462 /* 463 * dino_card_setup - Set up the memory space for a Dino in card mode. 464 * @bus: the bus under this dino 465 * 466 * Claim an 8MB chunk of unused IO space and call the generic PCI routines 467 * to set up the addresses of the devices on this bus. 468 */ 469 #define _8MB 0x00800000UL 470 static void __init 471 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr) 472 { 473 int i; 474 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 475 struct resource *res; 476 char name[128]; 477 int size; 478 479 res = &dino_dev->hba.lmmio_space; 480 res->flags = IORESOURCE_MEM; 481 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", 482 dev_name(bus->bridge)); 483 res->name = kmalloc(size+1, GFP_KERNEL); 484 if(res->name) 485 strcpy((char *)res->name, name); 486 else 487 res->name = dino_dev->hba.lmmio_space.name; 488 489 490 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB, 491 F_EXTEND(0xf0000000UL) | _8MB, 492 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) { 493 struct list_head *ln, *tmp_ln; 494 495 printk(KERN_ERR "Dino: cannot attach bus %s\n", 496 dev_name(bus->bridge)); 497 /* kill the bus, we can't do anything with it */ 498 list_for_each_safe(ln, tmp_ln, &bus->devices) { 499 struct pci_dev *dev = pci_dev_b(ln); 500 501 list_del(&dev->bus_list); 502 } 503 504 return; 505 } 506 bus->resource[1] = res; 507 bus->resource[0] = &(dino_dev->hba.io_space); 508 509 /* Now tell dino what range it has */ 510 for (i = 1; i < 31; i++) { 511 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB))) 512 break; 513 } 514 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", 515 i, res->start, base_addr + DINO_IO_ADDR_EN); 516 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN); 517 } 518 519 static void __init 520 dino_card_fixup(struct pci_dev *dev) 521 { 522 u32 irq_pin; 523 524 /* 525 ** REVISIT: card-mode PCI-PCI expansion chassis do exist. 526 ** Not sure they were ever productized. 527 ** Die here since we'll die later in dino_inb() anyway. 528 */ 529 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 530 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n"); 531 } 532 533 /* 534 ** Set Latency Timer to 0xff (not a shared bus) 535 ** Set CACHELINE_SIZE. 536 */ 537 dino_cfg_write(dev->bus, dev->devfn, 538 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); 539 540 /* 541 ** Program INT_LINE for card-mode devices. 542 ** The cards are hardwired according to this algorithm. 543 ** And it doesn't matter if PPB's are present or not since 544 ** the IRQ lines bypass the PPB. 545 ** 546 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range. 547 ** The additional "-1" adjusts for skewing the IRQ<->slot. 548 */ 549 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin); 550 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 551 552 /* Shouldn't really need to do this but it's in case someone tries 553 ** to bypass PCI services and look at the card themselves. 554 */ 555 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); 556 } 557 558 /* The alignment contraints for PCI bridges under dino */ 559 #define DINO_BRIDGE_ALIGN 0x100000 560 561 562 static void __init 563 dino_fixup_bus(struct pci_bus *bus) 564 { 565 struct list_head *ln; 566 struct pci_dev *dev; 567 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 568 int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num); 569 570 DBG(KERN_WARNING "%s(0x%p) bus %d platform_data 0x%p\n", 571 __func__, bus, bus->secondary, 572 bus->bridge->platform_data); 573 574 /* Firmware doesn't set up card-mode dino, so we have to */ 575 if (is_card_dino(&dino_dev->hba.dev->id)) { 576 dino_card_setup(bus, dino_dev->hba.base_addr); 577 } else if(bus->parent == NULL) { 578 /* must have a dino above it, reparent the resources 579 * into the dino window */ 580 int i; 581 struct resource *res = &dino_dev->hba.lmmio_space; 582 583 bus->resource[0] = &(dino_dev->hba.io_space); 584 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { 585 if(res[i].flags == 0) 586 break; 587 bus->resource[i+1] = &res[i]; 588 } 589 590 } else if (bus->parent) { 591 int i; 592 593 pci_read_bridge_bases(bus); 594 595 596 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { 597 if((bus->self->resource[i].flags & 598 (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 599 continue; 600 601 if(bus->self->resource[i].flags & IORESOURCE_MEM) { 602 /* There's a quirk to alignment of 603 * bridge memory resources: the start 604 * is the alignment and start-end is 605 * the size. However, firmware will 606 * have assigned start and end, so we 607 * need to take this into account */ 608 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN; 609 bus->self->resource[i].start = DINO_BRIDGE_ALIGN; 610 611 } 612 613 DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n", 614 dev_name(&bus->self->dev), i, 615 bus->self->resource[i].start, 616 bus->self->resource[i].end); 617 WARN_ON(pci_assign_resource(bus->self, i)); 618 DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n", 619 dev_name(&bus->self->dev), i, 620 bus->self->resource[i].start, 621 bus->self->resource[i].end); 622 } 623 } 624 625 626 list_for_each(ln, &bus->devices) { 627 int i; 628 629 dev = pci_dev_b(ln); 630 if (is_card_dino(&dino_dev->hba.dev->id)) 631 dino_card_fixup(dev); 632 633 /* 634 ** P2PB's only have 2 BARs, no IRQs. 635 ** I'd like to just ignore them for now. 636 */ 637 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) 638 continue; 639 640 /* Adjust the I/O Port space addresses */ 641 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 642 struct resource *res = &dev->resource[i]; 643 if (res->flags & IORESOURCE_IO) { 644 res->start |= port_base; 645 res->end |= port_base; 646 } 647 #ifdef __LP64__ 648 /* Sign Extend MMIO addresses */ 649 else if (res->flags & IORESOURCE_MEM) { 650 res->start |= F_EXTEND(0UL); 651 res->end |= F_EXTEND(0UL); 652 } 653 #endif 654 } 655 /* null out the ROM resource if there is one (we don't 656 * care about an expansion rom on parisc, since it 657 * usually contains (x86) bios code) */ 658 dev->resource[PCI_ROM_RESOURCE].flags = 0; 659 660 if(dev->irq == 255) { 661 662 #define DINO_FIX_UNASSIGNED_INTERRUPTS 663 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS 664 665 /* This code tries to assign an unassigned 666 * interrupt. Leave it disabled unless you 667 * *really* know what you're doing since the 668 * pin<->interrupt line mapping varies by bus 669 * and machine */ 670 671 u32 irq_pin; 672 673 dino_cfg_read(dev->bus, dev->devfn, 674 PCI_INTERRUPT_PIN, 1, &irq_pin); 675 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 676 printk(KERN_WARNING "Device %s has undefined IRQ, " 677 "setting to %d\n", pci_name(dev), irq_pin); 678 dino_cfg_write(dev->bus, dev->devfn, 679 PCI_INTERRUPT_LINE, 1, irq_pin); 680 dino_assign_irq(dino_dev, irq_pin, &dev->irq); 681 #else 682 dev->irq = 65535; 683 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev)); 684 #endif 685 } else { 686 /* Adjust INT_LINE for that busses region */ 687 dino_assign_irq(dino_dev, dev->irq, &dev->irq); 688 } 689 } 690 } 691 692 693 static struct pci_bios_ops dino_bios_ops = { 694 .init = dino_bios_init, 695 .fixup_bus = dino_fixup_bus 696 }; 697 698 699 /* 700 * Initialise a DINO controller chip 701 */ 702 static void __init 703 dino_card_init(struct dino_device *dino_dev) 704 { 705 u32 brdg_feat = 0x00784e05; 706 unsigned long status; 707 708 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS); 709 if (status & 0x0000ff80) { 710 __raw_writel(0x00000005, 711 dino_dev->hba.base_addr+DINO_IO_COMMAND); 712 udelay(1); 713 } 714 715 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK); 716 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN); 717 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR); 718 719 #if 1 720 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */ 721 /* 722 ** PCX-L processors don't support XQL like Dino wants it. 723 ** PCX-L2 ignore XQL signal and it doesn't matter. 724 */ 725 brdg_feat &= ~0x4; /* UXQL */ 726 #endif 727 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT); 728 729 /* 730 ** Don't enable address decoding until we know which I/O range 731 ** currently is available from the host. Only affects MMIO 732 ** and not I/O port space. 733 */ 734 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN); 735 736 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE); 737 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR); 738 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR); 739 740 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM); 741 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL); 742 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM); 743 744 /* Disable PAMR before writing PAPR */ 745 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR); 746 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR); 747 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR); 748 749 /* 750 ** Dino ERS encourages enabling FBB (0x6f). 751 ** We can't until we know *all* devices below us can support it. 752 ** (Something in device configuration header tells us). 753 */ 754 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD); 755 756 /* Somewhere, the PCI spec says give devices 1 second 757 ** to recover from the #RESET being de-asserted. 758 ** Experience shows most devices only need 10ms. 759 ** This short-cut speeds up booting significantly. 760 */ 761 mdelay(pci_post_reset_delay); 762 } 763 764 static int __init 765 dino_bridge_init(struct dino_device *dino_dev, const char *name) 766 { 767 unsigned long io_addr; 768 int result, i, count=0; 769 struct resource *res, *prevres = NULL; 770 /* 771 * Decoding IO_ADDR_EN only works for Built-in Dino 772 * since PDC has already initialized this. 773 */ 774 775 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN); 776 if (io_addr == 0) { 777 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name); 778 return -ENODEV; 779 } 780 781 res = &dino_dev->hba.lmmio_space; 782 for (i = 0; i < 32; i++) { 783 unsigned long start, end; 784 785 if((io_addr & (1 << i)) == 0) 786 continue; 787 788 start = F_EXTEND(0xf0000000UL) | (i << 23); 789 end = start + 8 * 1024 * 1024 - 1; 790 791 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count, 792 start, end); 793 794 if(prevres && prevres->end + 1 == start) { 795 prevres->end = end; 796 } else { 797 if(count >= DINO_MAX_LMMIO_RESOURCES) { 798 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end); 799 break; 800 } 801 prevres = res; 802 res->start = start; 803 res->end = end; 804 res->flags = IORESOURCE_MEM; 805 res->name = kmalloc(64, GFP_KERNEL); 806 if(res->name) 807 snprintf((char *)res->name, 64, "%s LMMIO %d", 808 name, count); 809 res++; 810 count++; 811 } 812 } 813 814 res = &dino_dev->hba.lmmio_space; 815 816 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { 817 if(res[i].flags == 0) 818 break; 819 820 result = ccio_request_resource(dino_dev->hba.dev, &res[i]); 821 if (result < 0) { 822 printk(KERN_ERR "%s: failed to claim PCI Bus address " 823 "space %d (0x%lx-0x%lx)!\n", name, i, 824 (unsigned long)res[i].start, (unsigned long)res[i].end); 825 return result; 826 } 827 } 828 return 0; 829 } 830 831 static int __init dino_common_init(struct parisc_device *dev, 832 struct dino_device *dino_dev, const char *name) 833 { 834 int status; 835 u32 eim; 836 struct gsc_irq gsc_irq; 837 struct resource *res; 838 839 pcibios_register_hba(&dino_dev->hba); 840 841 pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */ 842 pci_port = &dino_port_ops; 843 844 /* 845 ** Note: SMP systems can make use of IRR1/IAR1 registers 846 ** But it won't buy much performance except in very 847 ** specific applications/configurations. Note Dino 848 ** still only has 11 IRQ input lines - just map some of them 849 ** to a different processor. 850 */ 851 dev->irq = gsc_alloc_irq(&gsc_irq); 852 dino_dev->txn_addr = gsc_irq.txn_addr; 853 dino_dev->txn_data = gsc_irq.txn_data; 854 eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; 855 856 /* 857 ** Dino needs a PA "IRQ" to get a processor's attention. 858 ** arch/parisc/kernel/irq.c returns an EIRR bit. 859 */ 860 if (dev->irq < 0) { 861 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name); 862 return 1; 863 } 864 865 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev); 866 if (status) { 867 printk(KERN_WARNING "%s: request_irq() failed with %d\n", 868 name, status); 869 return 1; 870 } 871 872 /* Support the serial port which is sometimes attached on built-in 873 * Dino / Cujo chips. 874 */ 875 876 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq); 877 878 /* 879 ** This enables DINO to generate interrupts when it sees 880 ** any of its inputs *change*. Just asserting an IRQ 881 ** before it's enabled (ie unmasked) isn't good enough. 882 */ 883 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); 884 885 /* 886 ** Some platforms don't clear Dino's IRR0 register at boot time. 887 ** Reading will clear it now. 888 */ 889 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0); 890 891 /* allocate I/O Port resource region */ 892 res = &dino_dev->hba.io_space; 893 if (!is_cujo(&dev->id)) { 894 res->name = "Dino I/O Port"; 895 } else { 896 res->name = "Cujo I/O Port"; 897 } 898 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num); 899 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1); 900 res->flags = IORESOURCE_IO; /* do not mark it busy ! */ 901 if (request_resource(&ioport_resource, res) < 0) { 902 printk(KERN_ERR "%s: request I/O Port region failed " 903 "0x%lx/%lx (hpa 0x%p)\n", 904 name, (unsigned long)res->start, (unsigned long)res->end, 905 dino_dev->hba.base_addr); 906 return 1; 907 } 908 909 return 0; 910 } 911 912 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) 913 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) 914 #define CUJO_RAVEN_BADPAGE 0x01003000UL 915 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL 916 917 static const char *dino_vers[] = { 918 "2.0", 919 "2.1", 920 "3.0", 921 "3.1" 922 }; 923 924 static const char *cujo_vers[] = { 925 "1.0", 926 "2.0" 927 }; 928 929 void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); 930 931 /* 932 ** Determine if dino should claim this chip (return 0) or not (return 1). 933 ** If so, initialize the chip appropriately (card-mode vs bridge mode). 934 ** Much of the initialization is common though. 935 */ 936 static int __init dino_probe(struct parisc_device *dev) 937 { 938 struct dino_device *dino_dev; // Dino specific control struct 939 const char *version = "unknown"; 940 char *name; 941 int is_cujo = 0; 942 struct pci_bus *bus; 943 unsigned long hpa = dev->hpa.start; 944 945 name = "Dino"; 946 if (is_card_dino(&dev->id)) { 947 version = "3.x (card mode)"; 948 } else { 949 if (!is_cujo(&dev->id)) { 950 if (dev->id.hversion_rev < 4) { 951 version = dino_vers[dev->id.hversion_rev]; 952 } 953 } else { 954 name = "Cujo"; 955 is_cujo = 1; 956 if (dev->id.hversion_rev < 2) { 957 version = cujo_vers[dev->id.hversion_rev]; 958 } 959 } 960 } 961 962 printk("%s version %s found at 0x%lx\n", name, version, hpa); 963 964 if (!request_mem_region(hpa, PAGE_SIZE, name)) { 965 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n", 966 hpa); 967 return 1; 968 } 969 970 /* Check for bugs */ 971 if (is_cujo && dev->id.hversion_rev == 1) { 972 #ifdef CONFIG_IOMMU_CCIO 973 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); 974 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { 975 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); 976 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { 977 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); 978 } else { 979 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa); 980 } 981 #endif 982 } else if (!is_cujo && !is_card_dino(&dev->id) && 983 dev->id.hversion_rev < 3) { 984 printk(KERN_WARNING 985 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" 986 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" 987 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" 988 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", 989 dev->id.hversion_rev); 990 /* REVISIT: why are C200/C240 listed in the README table but not 991 ** "Models affected"? Could be an omission in the original literature. 992 */ 993 } 994 995 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); 996 if (!dino_dev) { 997 printk("dino_init_chip - couldn't alloc dino_device\n"); 998 return 1; 999 } 1000 1001 dino_dev->hba.dev = dev; 1002 dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096); 1003 dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */ 1004 spin_lock_init(&dino_dev->dinosaur_pen); 1005 dino_dev->hba.iommu = ccio_get_iommu(dev); 1006 1007 if (is_card_dino(&dev->id)) { 1008 dino_card_init(dino_dev); 1009 } else { 1010 dino_bridge_init(dino_dev, name); 1011 } 1012 1013 if (dino_common_init(dev, dino_dev, name)) 1014 return 1; 1015 1016 dev->dev.platform_data = dino_dev; 1017 1018 /* 1019 ** It's not used to avoid chicken/egg problems 1020 ** with configuration accessor functions. 1021 */ 1022 dino_dev->hba.hba_bus = bus = pci_scan_bus_parented(&dev->dev, 1023 dino_current_bus, &dino_cfg_ops, NULL); 1024 1025 if(bus) { 1026 /* This code *depends* on scanning being single threaded 1027 * if it isn't, this global bus number count will fail 1028 */ 1029 dino_current_bus = bus->subordinate + 1; 1030 pci_bus_assign_resources(bus); 1031 pci_bus_add_devices(bus); 1032 } else { 1033 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n", 1034 dev_name(&dev->dev), dino_current_bus); 1035 /* increment the bus number in case of duplicates */ 1036 dino_current_bus++; 1037 } 1038 return 0; 1039 } 1040 1041 /* 1042 * Normally, we would just test sversion. But the Elroy PCI adapter has 1043 * the same sversion as Dino, so we have to check hversion as well. 1044 * Unfortunately, the J2240 PDC reports the wrong hversion for the first 1045 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. 1046 * For card-mode Dino, most machines report an sversion of 9D. But 715 1047 * and 725 firmware misreport it as 0x08080 for no adequately explained 1048 * reason. 1049 */ 1050 static struct parisc_device_id dino_tbl[] = { 1051 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ 1052 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ 1053 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ 1054 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ 1055 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ 1056 { 0, } 1057 }; 1058 1059 static struct parisc_driver dino_driver = { 1060 .name = "dino", 1061 .id_table = dino_tbl, 1062 .probe = dino_probe, 1063 }; 1064 1065 /* 1066 * One time initialization to let the world know Dino is here. 1067 * This is the only routine which is NOT static. 1068 * Must be called exactly once before pci_init(). 1069 */ 1070 int __init dino_init(void) 1071 { 1072 register_parisc_driver(&dino_driver); 1073 return 0; 1074 } 1075 1076