1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 ** DINO manager 4 ** 5 ** (c) Copyright 1999 Red Hat Software 6 ** (c) Copyright 1999 SuSE GmbH 7 ** (c) Copyright 1999,2000 Hewlett-Packard Company 8 ** (c) Copyright 2000 Grant Grundler 9 ** (c) Copyright 2006-2019 Helge Deller 10 ** 11 ** 12 ** This module provides access to Dino PCI bus (config/IOport spaces) 13 ** and helps manage Dino IRQ lines. 14 ** 15 ** Dino interrupt handling is a bit complicated. 16 ** Dino always writes to the broadcast EIR via irr0 for now. 17 ** (BIG WARNING: using broadcast EIR is a really bad thing for SMP!) 18 ** Only one processor interrupt is used for the 11 IRQ line 19 ** inputs to dino. 20 ** 21 ** The different between Built-in Dino and Card-Mode 22 ** dino is in chip initialization and pci device initialization. 23 ** 24 ** Linux drivers can only use Card-Mode Dino if pci devices I/O port 25 ** BARs are configured and used by the driver. Programming MMIO address 26 ** requires substantial knowledge of available Host I/O address ranges 27 ** is currently not supported. Port/Config accessor functions are the 28 ** same. "BIOS" differences are handled within the existing routines. 29 */ 30 31 /* Changes : 32 ** 2001-06-14 : Clement Moyroud (moyroudc@esiee.fr) 33 ** - added support for the integrated RS232. 34 */ 35 36 /* 37 ** TODO: create a virtual address for each Dino HPA. 38 ** GSC code might be able to do this since IODC data tells us 39 ** how many pages are used. PCI subsystem could (must?) do this 40 ** for PCI drivers devices which implement/use MMIO registers. 41 */ 42 43 #include <linux/delay.h> 44 #include <linux/types.h> 45 #include <linux/kernel.h> 46 #include <linux/pci.h> 47 #include <linux/init.h> 48 #include <linux/ioport.h> 49 #include <linux/slab.h> 50 #include <linux/interrupt.h> /* for struct irqaction */ 51 #include <linux/spinlock.h> /* for spinlock_t and prototypes */ 52 53 #include <asm/pdc.h> 54 #include <asm/page.h> 55 #include <asm/io.h> 56 #include <asm/hardware.h> 57 58 #include "gsc.h" 59 #include "iommu.h" 60 61 #undef DINO_DEBUG 62 63 #ifdef DINO_DEBUG 64 #define DBG(x...) printk(x) 65 #else 66 #define DBG(x...) 67 #endif 68 69 /* 70 ** Config accessor functions only pass in the 8-bit bus number 71 ** and not the 8-bit "PCI Segment" number. Each Dino will be 72 ** assigned a PCI bus number based on "when" it's discovered. 73 ** 74 ** The "secondary" bus number is set to this before calling 75 ** pci_scan_bus(). If any PPB's are present, the scan will 76 ** discover them and update the "secondary" and "subordinate" 77 ** fields in Dino's pci_bus structure. 78 ** 79 ** Changes in the configuration *will* result in a different 80 ** bus number for each dino. 81 */ 82 83 #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA) 84 #define is_cujo(id) ((id)->hversion == 0x682) 85 86 #define DINO_IAR0 0x004 87 #define DINO_IODC_ADDR 0x008 88 #define DINO_IODC_DATA_0 0x008 89 #define DINO_IODC_DATA_1 0x008 90 #define DINO_IRR0 0x00C 91 #define DINO_IAR1 0x010 92 #define DINO_IRR1 0x014 93 #define DINO_IMR 0x018 94 #define DINO_IPR 0x01C 95 #define DINO_TOC_ADDR 0x020 96 #define DINO_ICR 0x024 97 #define DINO_ILR 0x028 98 #define DINO_IO_COMMAND 0x030 99 #define DINO_IO_STATUS 0x034 100 #define DINO_IO_CONTROL 0x038 101 #define DINO_IO_GSC_ERR_RESP 0x040 102 #define DINO_IO_ERR_INFO 0x044 103 #define DINO_IO_PCI_ERR_RESP 0x048 104 #define DINO_IO_FBB_EN 0x05c 105 #define DINO_IO_ADDR_EN 0x060 106 #define DINO_PCI_ADDR 0x064 107 #define DINO_CONFIG_DATA 0x068 108 #define DINO_IO_DATA 0x06c 109 #define DINO_MEM_DATA 0x070 /* Dino 3.x only */ 110 #define DINO_GSC2X_CONFIG 0x7b4 111 #define DINO_GMASK 0x800 112 #define DINO_PAMR 0x804 113 #define DINO_PAPR 0x808 114 #define DINO_DAMODE 0x80c 115 #define DINO_PCICMD 0x810 116 #define DINO_PCISTS 0x814 117 #define DINO_MLTIM 0x81c 118 #define DINO_BRDG_FEAT 0x820 119 #define DINO_PCIROR 0x824 120 #define DINO_PCIWOR 0x828 121 #define DINO_TLTIM 0x830 122 123 #define DINO_IRQS 11 /* bits 0-10 are architected */ 124 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ 125 #define DINO_LOCAL_IRQS (DINO_IRQS+1) 126 127 #define DINO_MASK_IRQ(x) (1<<(x)) 128 129 #define PCIINTA 0x001 130 #define PCIINTB 0x002 131 #define PCIINTC 0x004 132 #define PCIINTD 0x008 133 #define PCIINTE 0x010 134 #define PCIINTF 0x020 135 #define GSCEXTINT 0x040 136 /* #define xxx 0x080 - bit 7 is "default" */ 137 /* #define xxx 0x100 - bit 8 not used */ 138 /* #define xxx 0x200 - bit 9 not used */ 139 #define RS232INT 0x400 140 141 struct dino_device 142 { 143 struct pci_hba_data hba; /* 'C' inheritance - must be first */ 144 spinlock_t dinosaur_pen; 145 u32 imr; /* IRQ's which are enabled */ 146 struct gsc_irq gsc_irq; 147 int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ 148 #ifdef DINO_DEBUG 149 unsigned int dino_irr0; /* save most recent IRQ line stat */ 150 #endif 151 }; 152 153 static inline struct dino_device *DINO_DEV(struct pci_hba_data *hba) 154 { 155 return container_of(hba, struct dino_device, hba); 156 } 157 158 /* 159 * Dino Configuration Space Accessor Functions 160 */ 161 162 #define DINO_CFG_TOK(bus,dfn,pos) ((u32) ((bus)<<16 | (dfn)<<8 | (pos))) 163 164 /* 165 * keep the current highest bus count to assist in allocating busses. This 166 * tries to keep a global bus count total so that when we discover an 167 * entirely new bus, it can be given a unique bus number. 168 */ 169 static int dino_current_bus = 0; 170 171 static int dino_cfg_read(struct pci_bus *bus, unsigned int devfn, int where, 172 int size, u32 *val) 173 { 174 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 175 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; 176 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 177 void __iomem *base_addr = d->hba.base_addr; 178 unsigned long flags; 179 180 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 181 size); 182 spin_lock_irqsave(&d->dinosaur_pen, flags); 183 184 /* tell HW which CFG address */ 185 __raw_writel(v, base_addr + DINO_PCI_ADDR); 186 187 /* generate cfg read cycle */ 188 if (size == 1) { 189 *val = readb(base_addr + DINO_CONFIG_DATA + (where & 3)); 190 } else if (size == 2) { 191 *val = readw(base_addr + DINO_CONFIG_DATA + (where & 2)); 192 } else if (size == 4) { 193 *val = readl(base_addr + DINO_CONFIG_DATA); 194 } 195 196 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 197 return 0; 198 } 199 200 /* 201 * Dino address stepping "feature": 202 * When address stepping, Dino attempts to drive the bus one cycle too soon 203 * even though the type of cycle (config vs. MMIO) might be different. 204 * The read of Ven/Prod ID is harmless and avoids Dino's address stepping. 205 */ 206 static int dino_cfg_write(struct pci_bus *bus, unsigned int devfn, int where, 207 int size, u32 val) 208 { 209 struct dino_device *d = DINO_DEV(parisc_walk_tree(bus->bridge)); 210 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start; 211 u32 v = DINO_CFG_TOK(local_bus, devfn, where & ~3); 212 void __iomem *base_addr = d->hba.base_addr; 213 unsigned long flags; 214 215 DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, 216 size); 217 spin_lock_irqsave(&d->dinosaur_pen, flags); 218 219 /* avoid address stepping feature */ 220 __raw_writel(v & 0xffffff00, base_addr + DINO_PCI_ADDR); 221 __raw_readl(base_addr + DINO_CONFIG_DATA); 222 223 /* tell HW which CFG address */ 224 __raw_writel(v, base_addr + DINO_PCI_ADDR); 225 /* generate cfg read cycle */ 226 if (size == 1) { 227 writeb(val, base_addr + DINO_CONFIG_DATA + (where & 3)); 228 } else if (size == 2) { 229 writew(val, base_addr + DINO_CONFIG_DATA + (where & 2)); 230 } else if (size == 4) { 231 writel(val, base_addr + DINO_CONFIG_DATA); 232 } 233 234 spin_unlock_irqrestore(&d->dinosaur_pen, flags); 235 return 0; 236 } 237 238 static struct pci_ops dino_cfg_ops = { 239 .read = dino_cfg_read, 240 .write = dino_cfg_write, 241 }; 242 243 244 /* 245 * Dino "I/O Port" Space Accessor Functions 246 * 247 * Many PCI devices don't require use of I/O port space (eg Tulip, 248 * NCR720) since they export the same registers to both MMIO and 249 * I/O port space. Performance is going to stink if drivers use 250 * I/O port instead of MMIO. 251 */ 252 253 #define DINO_PORT_IN(type, size, mask) \ 254 static u##size dino_in##size (struct pci_hba_data *d, u16 addr) \ 255 { \ 256 u##size v; \ 257 unsigned long flags; \ 258 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 259 /* tell HW which IO Port address */ \ 260 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 261 /* generate I/O PORT read cycle */ \ 262 v = read##type(d->base_addr+DINO_IO_DATA+(addr&mask)); \ 263 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 264 return v; \ 265 } 266 267 DINO_PORT_IN(b, 8, 3) 268 DINO_PORT_IN(w, 16, 2) 269 DINO_PORT_IN(l, 32, 0) 270 271 #define DINO_PORT_OUT(type, size, mask) \ 272 static void dino_out##size (struct pci_hba_data *d, u16 addr, u##size val) \ 273 { \ 274 unsigned long flags; \ 275 spin_lock_irqsave(&(DINO_DEV(d)->dinosaur_pen), flags); \ 276 /* tell HW which IO port address */ \ 277 __raw_writel((u32) addr, d->base_addr + DINO_PCI_ADDR); \ 278 /* generate cfg write cycle */ \ 279 write##type(val, d->base_addr+DINO_IO_DATA+(addr&mask)); \ 280 spin_unlock_irqrestore(&(DINO_DEV(d)->dinosaur_pen), flags); \ 281 } 282 283 DINO_PORT_OUT(b, 8, 3) 284 DINO_PORT_OUT(w, 16, 2) 285 DINO_PORT_OUT(l, 32, 0) 286 287 static struct pci_port_ops dino_port_ops = { 288 .inb = dino_in8, 289 .inw = dino_in16, 290 .inl = dino_in32, 291 .outb = dino_out8, 292 .outw = dino_out16, 293 .outl = dino_out32 294 }; 295 296 static void dino_mask_irq(struct irq_data *d) 297 { 298 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); 299 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 300 301 DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq); 302 303 /* Clear the matching bit in the IMR register */ 304 dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq)); 305 __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 306 } 307 308 static void dino_unmask_irq(struct irq_data *d) 309 { 310 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); 311 int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); 312 u32 tmp; 313 314 DBG(KERN_WARNING "%s(0x%px, %d)\n", __func__, dino_dev, d->irq); 315 316 /* 317 ** clear pending IRQ bits 318 ** 319 ** This does NOT change ILR state! 320 ** See comment below for ILR usage. 321 */ 322 __raw_readl(dino_dev->hba.base_addr+DINO_IPR); 323 324 /* set the matching bit in the IMR register */ 325 dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */ 326 __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); 327 328 /* Emulate "Level Triggered" Interrupt 329 ** Basically, a driver is blowing it if the IRQ line is asserted 330 ** while the IRQ is disabled. But tulip.c seems to do that.... 331 ** Give 'em a kluge award and a nice round of applause! 332 ** 333 ** The gsc_write will generate an interrupt which invokes dino_isr(). 334 ** dino_isr() will read IPR and find nothing. But then catch this 335 ** when it also checks ILR. 336 */ 337 tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR); 338 if (tmp & DINO_MASK_IRQ(local_irq)) { 339 DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", 340 __func__, tmp); 341 gsc_writel(dino_dev->gsc_irq.txn_data, dino_dev->gsc_irq.txn_addr); 342 } 343 } 344 345 #ifdef CONFIG_SMP 346 static int dino_set_affinity_irq(struct irq_data *d, const struct cpumask *dest, 347 bool force) 348 { 349 struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); 350 struct cpumask tmask; 351 int cpu_irq; 352 u32 eim; 353 354 if (!cpumask_and(&tmask, dest, cpu_online_mask)) 355 return -EINVAL; 356 357 cpu_irq = cpu_check_affinity(d, &tmask); 358 if (cpu_irq < 0) 359 return cpu_irq; 360 361 dino_dev->gsc_irq.txn_addr = txn_affinity_addr(d->irq, cpu_irq); 362 eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data; 363 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); 364 365 irq_data_update_effective_affinity(d, &tmask); 366 367 return IRQ_SET_MASK_OK; 368 } 369 #endif 370 371 static struct irq_chip dino_interrupt_type = { 372 .name = "GSC-PCI", 373 .irq_unmask = dino_unmask_irq, 374 .irq_mask = dino_mask_irq, 375 #ifdef CONFIG_SMP 376 .irq_set_affinity = dino_set_affinity_irq, 377 #endif 378 }; 379 380 381 /* 382 * Handle a Processor interrupt generated by Dino. 383 * 384 * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from 385 * wedging the CPU. Could be removed or made optional at some point. 386 */ 387 static irqreturn_t dino_isr(int irq, void *intr_dev) 388 { 389 struct dino_device *dino_dev = intr_dev; 390 u32 mask; 391 int ilr_loop = 100; 392 393 /* read and acknowledge pending interrupts */ 394 #ifdef DINO_DEBUG 395 dino_dev->dino_irr0 = 396 #endif 397 mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK; 398 399 if (mask == 0) 400 return IRQ_NONE; 401 402 ilr_again: 403 do { 404 int local_irq = __ffs(mask); 405 int irq = dino_dev->global_irq[local_irq]; 406 DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n", 407 __func__, irq, intr_dev, mask); 408 generic_handle_irq(irq); 409 mask &= ~DINO_MASK_IRQ(local_irq); 410 } while (mask); 411 412 /* Support for level triggered IRQ lines. 413 ** 414 ** Dropping this support would make this routine *much* faster. 415 ** But since PCI requires level triggered IRQ line to share lines... 416 ** device drivers may assume lines are level triggered (and not 417 ** edge triggered like EISA/ISA can be). 418 */ 419 mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr; 420 if (mask) { 421 if (--ilr_loop > 0) 422 goto ilr_again; 423 pr_warn_ratelimited("Dino 0x%px: stuck interrupt %d\n", 424 dino_dev->hba.base_addr, mask); 425 } 426 return IRQ_HANDLED; 427 } 428 429 static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp) 430 { 431 int irq = gsc_assign_irq(&dino_interrupt_type, dino); 432 if (irq == NO_IRQ) 433 return; 434 435 *irqp = irq; 436 dino->global_irq[local_irq] = irq; 437 } 438 439 static void dino_choose_irq(struct parisc_device *dev, void *ctrl) 440 { 441 int irq; 442 struct dino_device *dino = ctrl; 443 444 switch (dev->id.sversion) { 445 case 0x00084: irq = 8; break; /* PS/2 */ 446 case 0x0008c: irq = 10; break; /* RS232 */ 447 case 0x00096: irq = 8; break; /* PS/2 */ 448 default: return; /* Unknown */ 449 } 450 451 dino_assign_irq(dino, irq, &dev->irq); 452 } 453 454 455 /* 456 * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de) 457 * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...) 458 */ 459 static void quirk_cirrus_cardbus(struct pci_dev *dev) 460 { 461 u8 new_irq = dev->irq - 1; 462 printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n", 463 pci_name(dev), dev->irq, new_irq); 464 dev->irq = new_irq; 465 } 466 DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus ); 467 468 #ifdef CONFIG_TULIP 469 /* Check if PCI device is behind a Card-mode Dino. */ 470 static int pci_dev_is_behind_card_dino(struct pci_dev *dev) 471 { 472 struct dino_device *dino_dev; 473 474 dino_dev = DINO_DEV(parisc_walk_tree(dev->bus->bridge)); 475 return is_card_dino(&dino_dev->hba.dev->id); 476 } 477 478 static void pci_fixup_tulip(struct pci_dev *dev) 479 { 480 if (!pci_dev_is_behind_card_dino(dev)) 481 return; 482 if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) 483 return; 484 pr_warn("%s: HP HSC-PCI Cards with card-mode Dino not yet supported.\n", 485 pci_name(dev)); 486 /* Disable this card by zeroing the PCI resources */ 487 memset(&dev->resource[0], 0, sizeof(dev->resource[0])); 488 memset(&dev->resource[1], 0, sizeof(dev->resource[1])); 489 } 490 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_DEC, PCI_ANY_ID, pci_fixup_tulip); 491 #endif /* CONFIG_TULIP */ 492 493 static void __init 494 dino_bios_init(void) 495 { 496 DBG("dino_bios_init\n"); 497 } 498 499 /* 500 * dino_card_setup - Set up the memory space for a Dino in card mode. 501 * @bus: the bus under this dino 502 * 503 * Claim an 8MB chunk of unused IO space and call the generic PCI routines 504 * to set up the addresses of the devices on this bus. 505 */ 506 #define _8MB 0x00800000UL 507 static void __init 508 dino_card_setup(struct pci_bus *bus, void __iomem *base_addr) 509 { 510 int i; 511 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 512 struct resource *res; 513 char name[128]; 514 int size; 515 516 res = &dino_dev->hba.lmmio_space; 517 res->flags = IORESOURCE_MEM; 518 size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", 519 dev_name(bus->bridge)); 520 res->name = kmalloc(size+1, GFP_KERNEL); 521 if(res->name) 522 strcpy((char *)res->name, name); 523 else 524 res->name = dino_dev->hba.lmmio_space.name; 525 526 527 if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB, 528 F_EXTEND(0xf0000000UL) | _8MB, 529 F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) { 530 struct pci_dev *dev, *tmp; 531 532 printk(KERN_ERR "Dino: cannot attach bus %s\n", 533 dev_name(bus->bridge)); 534 /* kill the bus, we can't do anything with it */ 535 list_for_each_entry_safe(dev, tmp, &bus->devices, bus_list) { 536 list_del(&dev->bus_list); 537 } 538 539 return; 540 } 541 bus->resource[1] = res; 542 bus->resource[0] = &(dino_dev->hba.io_space); 543 544 /* Now tell dino what range it has */ 545 for (i = 1; i < 31; i++) { 546 if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB))) 547 break; 548 } 549 DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", 550 i, res->start, base_addr + DINO_IO_ADDR_EN); 551 __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN); 552 } 553 554 static void __init 555 dino_card_fixup(struct pci_dev *dev) 556 { 557 u32 irq_pin; 558 559 /* 560 ** REVISIT: card-mode PCI-PCI expansion chassis do exist. 561 ** Not sure they were ever productized. 562 ** Die here since we'll die later in dino_inb() anyway. 563 */ 564 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 565 panic("Card-Mode Dino: PCI-PCI Bridge not supported\n"); 566 } 567 568 /* 569 ** Set Latency Timer to 0xff (not a shared bus) 570 ** Set CACHELINE_SIZE. 571 */ 572 dino_cfg_write(dev->bus, dev->devfn, 573 PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); 574 575 /* 576 ** Program INT_LINE for card-mode devices. 577 ** The cards are hardwired according to this algorithm. 578 ** And it doesn't matter if PPB's are present or not since 579 ** the IRQ lines bypass the PPB. 580 ** 581 ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range. 582 ** The additional "-1" adjusts for skewing the IRQ<->slot. 583 */ 584 dino_cfg_read(dev->bus, dev->devfn, PCI_INTERRUPT_PIN, 1, &irq_pin); 585 dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 586 587 /* Shouldn't really need to do this but it's in case someone tries 588 ** to bypass PCI services and look at the card themselves. 589 */ 590 dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); 591 } 592 593 /* The alignment contraints for PCI bridges under dino */ 594 #define DINO_BRIDGE_ALIGN 0x100000 595 596 597 static void __init 598 dino_fixup_bus(struct pci_bus *bus) 599 { 600 struct pci_dev *dev; 601 struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); 602 603 DBG(KERN_WARNING "%s(0x%px) bus %d platform_data 0x%px\n", 604 __func__, bus, bus->busn_res.start, 605 bus->bridge->platform_data); 606 607 /* Firmware doesn't set up card-mode dino, so we have to */ 608 if (is_card_dino(&dino_dev->hba.dev->id)) { 609 dino_card_setup(bus, dino_dev->hba.base_addr); 610 } else if (bus->parent) { 611 int i; 612 613 pci_read_bridge_bases(bus); 614 615 616 for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { 617 if((bus->self->resource[i].flags & 618 (IORESOURCE_IO | IORESOURCE_MEM)) == 0) 619 continue; 620 621 if(bus->self->resource[i].flags & IORESOURCE_MEM) { 622 /* There's a quirk to alignment of 623 * bridge memory resources: the start 624 * is the alignment and start-end is 625 * the size. However, firmware will 626 * have assigned start and end, so we 627 * need to take this into account */ 628 bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN; 629 bus->self->resource[i].start = DINO_BRIDGE_ALIGN; 630 631 } 632 633 DBG("DEBUG %s assigning %d [%pR]\n", 634 dev_name(&bus->self->dev), i, 635 &bus->self->resource[i]); 636 WARN_ON(pci_assign_resource(bus->self, i)); 637 DBG("DEBUG %s after assign %d [%pR]\n", 638 dev_name(&bus->self->dev), i, 639 &bus->self->resource[i]); 640 } 641 } 642 643 644 list_for_each_entry(dev, &bus->devices, bus_list) { 645 if (is_card_dino(&dino_dev->hba.dev->id)) 646 dino_card_fixup(dev); 647 648 /* 649 ** P2PB's only have 2 BARs, no IRQs. 650 ** I'd like to just ignore them for now. 651 */ 652 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { 653 pcibios_init_bridge(dev); 654 continue; 655 } 656 657 /* null out the ROM resource if there is one (we don't 658 * care about an expansion rom on parisc, since it 659 * usually contains (x86) bios code) */ 660 dev->resource[PCI_ROM_RESOURCE].flags = 0; 661 662 if(dev->irq == 255) { 663 664 #define DINO_FIX_UNASSIGNED_INTERRUPTS 665 #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS 666 667 /* This code tries to assign an unassigned 668 * interrupt. Leave it disabled unless you 669 * *really* know what you're doing since the 670 * pin<->interrupt line mapping varies by bus 671 * and machine */ 672 673 u32 irq_pin; 674 675 dino_cfg_read(dev->bus, dev->devfn, 676 PCI_INTERRUPT_PIN, 1, &irq_pin); 677 irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; 678 printk(KERN_WARNING "Device %s has undefined IRQ, " 679 "setting to %d\n", pci_name(dev), irq_pin); 680 dino_cfg_write(dev->bus, dev->devfn, 681 PCI_INTERRUPT_LINE, 1, irq_pin); 682 dino_assign_irq(dino_dev, irq_pin, &dev->irq); 683 #else 684 dev->irq = 65535; 685 printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev)); 686 #endif 687 } else { 688 /* Adjust INT_LINE for that busses region */ 689 dino_assign_irq(dino_dev, dev->irq, &dev->irq); 690 } 691 } 692 } 693 694 695 static struct pci_bios_ops dino_bios_ops = { 696 .init = dino_bios_init, 697 .fixup_bus = dino_fixup_bus 698 }; 699 700 701 /* 702 * Initialise a DINO controller chip 703 */ 704 static void __init 705 dino_card_init(struct dino_device *dino_dev) 706 { 707 u32 brdg_feat = 0x00784e05; 708 unsigned long status; 709 710 status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS); 711 if (status & 0x0000ff80) { 712 __raw_writel(0x00000005, 713 dino_dev->hba.base_addr+DINO_IO_COMMAND); 714 udelay(1); 715 } 716 717 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK); 718 __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN); 719 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR); 720 721 #if 1 722 /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */ 723 /* 724 ** PCX-L processors don't support XQL like Dino wants it. 725 ** PCX-L2 ignore XQL signal and it doesn't matter. 726 */ 727 brdg_feat &= ~0x4; /* UXQL */ 728 #endif 729 __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT); 730 731 /* 732 ** Don't enable address decoding until we know which I/O range 733 ** currently is available from the host. Only affects MMIO 734 ** and not I/O port space. 735 */ 736 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN); 737 738 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE); 739 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR); 740 __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR); 741 742 __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM); 743 __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL); 744 __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM); 745 746 /* Disable PAMR before writing PAPR */ 747 __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR); 748 __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR); 749 __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR); 750 751 /* 752 ** Dino ERS encourages enabling FBB (0x6f). 753 ** We can't until we know *all* devices below us can support it. 754 ** (Something in device configuration header tells us). 755 */ 756 __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD); 757 758 /* Somewhere, the PCI spec says give devices 1 second 759 ** to recover from the #RESET being de-asserted. 760 ** Experience shows most devices only need 10ms. 761 ** This short-cut speeds up booting significantly. 762 */ 763 mdelay(pci_post_reset_delay); 764 } 765 766 static int __init 767 dino_bridge_init(struct dino_device *dino_dev, const char *name) 768 { 769 unsigned long io_addr; 770 int result, i, count=0; 771 struct resource *res, *prevres = NULL; 772 /* 773 * Decoding IO_ADDR_EN only works for Built-in Dino 774 * since PDC has already initialized this. 775 */ 776 777 io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN); 778 if (io_addr == 0) { 779 printk(KERN_WARNING "%s: No PCI devices enabled.\n", name); 780 return -ENODEV; 781 } 782 783 res = &dino_dev->hba.lmmio_space; 784 for (i = 0; i < 32; i++) { 785 unsigned long start, end; 786 787 if((io_addr & (1 << i)) == 0) 788 continue; 789 790 start = F_EXTEND(0xf0000000UL) | (i << 23); 791 end = start + 8 * 1024 * 1024 - 1; 792 793 DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count, 794 start, end); 795 796 if(prevres && prevres->end + 1 == start) { 797 prevres->end = end; 798 } else { 799 if(count >= DINO_MAX_LMMIO_RESOURCES) { 800 printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end); 801 break; 802 } 803 prevres = res; 804 res->start = start; 805 res->end = end; 806 res->flags = IORESOURCE_MEM; 807 res->name = kmalloc(64, GFP_KERNEL); 808 if(res->name) 809 snprintf((char *)res->name, 64, "%s LMMIO %d", 810 name, count); 811 res++; 812 count++; 813 } 814 } 815 816 res = &dino_dev->hba.lmmio_space; 817 818 for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { 819 if(res[i].flags == 0) 820 break; 821 822 result = ccio_request_resource(dino_dev->hba.dev, &res[i]); 823 if (result < 0) { 824 printk(KERN_ERR "%s: failed to claim PCI Bus address " 825 "space %d (%pR)!\n", name, i, &res[i]); 826 return result; 827 } 828 } 829 return 0; 830 } 831 832 static int __init dino_common_init(struct parisc_device *dev, 833 struct dino_device *dino_dev, const char *name) 834 { 835 int status; 836 u32 eim; 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(&dino_dev->gsc_irq); 852 eim = ((u32) dino_dev->gsc_irq.txn_addr) | dino_dev->gsc_irq.txn_data; 853 854 /* 855 ** Dino needs a PA "IRQ" to get a processor's attention. 856 ** arch/parisc/kernel/irq.c returns an EIRR bit. 857 */ 858 if (dev->irq < 0) { 859 printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name); 860 return 1; 861 } 862 863 status = request_irq(dev->irq, dino_isr, 0, name, dino_dev); 864 if (status) { 865 printk(KERN_WARNING "%s: request_irq() failed with %d\n", 866 name, status); 867 return 1; 868 } 869 870 /* Support the serial port which is sometimes attached on built-in 871 * Dino / Cujo chips. 872 */ 873 874 gsc_fixup_irqs(dev, dino_dev, dino_choose_irq); 875 876 /* 877 ** This enables DINO to generate interrupts when it sees 878 ** any of its inputs *change*. Just asserting an IRQ 879 ** before it's enabled (ie unmasked) isn't good enough. 880 */ 881 __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); 882 883 /* 884 ** Some platforms don't clear Dino's IRR0 register at boot time. 885 ** Reading will clear it now. 886 */ 887 __raw_readl(dino_dev->hba.base_addr+DINO_IRR0); 888 889 /* allocate I/O Port resource region */ 890 res = &dino_dev->hba.io_space; 891 if (!is_cujo(&dev->id)) { 892 res->name = "Dino I/O Port"; 893 } else { 894 res->name = "Cujo I/O Port"; 895 } 896 res->start = HBA_PORT_BASE(dino_dev->hba.hba_num); 897 res->end = res->start + (HBA_PORT_SPACE_SIZE - 1); 898 res->flags = IORESOURCE_IO; /* do not mark it busy ! */ 899 if (request_resource(&ioport_resource, res) < 0) { 900 printk(KERN_ERR "%s: request I/O Port region failed " 901 "0x%lx/%lx (hpa 0x%px)\n", 902 name, (unsigned long)res->start, (unsigned long)res->end, 903 dino_dev->hba.base_addr); 904 return 1; 905 } 906 907 return 0; 908 } 909 910 #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) 911 #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) 912 #define CUJO_RAVEN_BADPAGE 0x01003000UL 913 #define CUJO_FIREHAWK_BADPAGE 0x01607000UL 914 915 static const char dino_vers[][4] = { 916 "2.0", 917 "2.1", 918 "3.0", 919 "3.1" 920 }; 921 922 static const char cujo_vers[][4] = { 923 "1.0", 924 "2.0" 925 }; 926 927 /* 928 ** Determine if dino should claim this chip (return 0) or not (return 1). 929 ** If so, initialize the chip appropriately (card-mode vs bridge mode). 930 ** Much of the initialization is common though. 931 */ 932 static int __init dino_probe(struct parisc_device *dev) 933 { 934 struct dino_device *dino_dev; // Dino specific control struct 935 const char *version = "unknown"; 936 char *name; 937 int is_cujo = 0; 938 LIST_HEAD(resources); 939 struct pci_bus *bus; 940 unsigned long hpa = dev->hpa.start; 941 int max; 942 943 name = "Dino"; 944 if (is_card_dino(&dev->id)) { 945 version = "3.x (card mode)"; 946 } else { 947 if (!is_cujo(&dev->id)) { 948 if (dev->id.hversion_rev < 4) { 949 version = dino_vers[dev->id.hversion_rev]; 950 } 951 } else { 952 name = "Cujo"; 953 is_cujo = 1; 954 if (dev->id.hversion_rev < 2) { 955 version = cujo_vers[dev->id.hversion_rev]; 956 } 957 } 958 } 959 960 printk("%s version %s found at 0x%lx\n", name, version, hpa); 961 962 if (!request_mem_region(hpa, PAGE_SIZE, name)) { 963 printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%lx)!\n", 964 hpa); 965 return 1; 966 } 967 968 /* Check for bugs */ 969 if (is_cujo && dev->id.hversion_rev == 1) { 970 #ifdef CONFIG_IOMMU_CCIO 971 printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); 972 if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { 973 ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); 974 } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { 975 ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); 976 } else { 977 printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa); 978 } 979 #endif 980 } else if (!is_cujo && !is_card_dino(&dev->id) && 981 dev->id.hversion_rev < 3) { 982 printk(KERN_WARNING 983 "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" 984 "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" 985 "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" 986 "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", 987 dev->id.hversion_rev); 988 /* REVISIT: why are C200/C240 listed in the README table but not 989 ** "Models affected"? Could be an omission in the original literature. 990 */ 991 } 992 993 dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); 994 if (!dino_dev) { 995 printk("dino_init_chip - couldn't alloc dino_device\n"); 996 return 1; 997 } 998 999 dino_dev->hba.dev = dev; 1000 dino_dev->hba.base_addr = ioremap(hpa, 4096); 1001 dino_dev->hba.lmmio_space_offset = PCI_F_EXTEND; 1002 spin_lock_init(&dino_dev->dinosaur_pen); 1003 dino_dev->hba.iommu = ccio_get_iommu(dev); 1004 1005 if (is_card_dino(&dev->id)) { 1006 dino_card_init(dino_dev); 1007 } else { 1008 dino_bridge_init(dino_dev, name); 1009 } 1010 1011 if (dino_common_init(dev, dino_dev, name)) 1012 return 1; 1013 1014 dev->dev.platform_data = dino_dev; 1015 1016 pci_add_resource_offset(&resources, &dino_dev->hba.io_space, 1017 HBA_PORT_BASE(dino_dev->hba.hba_num)); 1018 if (dino_dev->hba.lmmio_space.flags) 1019 pci_add_resource_offset(&resources, &dino_dev->hba.lmmio_space, 1020 dino_dev->hba.lmmio_space_offset); 1021 if (dino_dev->hba.elmmio_space.flags) 1022 pci_add_resource_offset(&resources, &dino_dev->hba.elmmio_space, 1023 dino_dev->hba.lmmio_space_offset); 1024 if (dino_dev->hba.gmmio_space.flags) 1025 pci_add_resource(&resources, &dino_dev->hba.gmmio_space); 1026 1027 dino_dev->hba.bus_num.start = dino_current_bus; 1028 dino_dev->hba.bus_num.end = 255; 1029 dino_dev->hba.bus_num.flags = IORESOURCE_BUS; 1030 pci_add_resource(&resources, &dino_dev->hba.bus_num); 1031 /* 1032 ** It's not used to avoid chicken/egg problems 1033 ** with configuration accessor functions. 1034 */ 1035 dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev, 1036 dino_current_bus, &dino_cfg_ops, NULL, &resources); 1037 if (!bus) { 1038 printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n", 1039 dev_name(&dev->dev), dino_current_bus); 1040 pci_free_resource_list(&resources); 1041 /* increment the bus number in case of duplicates */ 1042 dino_current_bus++; 1043 return 0; 1044 } 1045 1046 max = pci_scan_child_bus(bus); 1047 pci_bus_update_busn_res_end(bus, max); 1048 1049 /* This code *depends* on scanning being single threaded 1050 * if it isn't, this global bus number count will fail 1051 */ 1052 dino_current_bus = max + 1; 1053 pci_bus_assign_resources(bus); 1054 pci_bus_add_devices(bus); 1055 return 0; 1056 } 1057 1058 /* 1059 * Normally, we would just test sversion. But the Elroy PCI adapter has 1060 * the same sversion as Dino, so we have to check hversion as well. 1061 * Unfortunately, the J2240 PDC reports the wrong hversion for the first 1062 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. 1063 * For card-mode Dino, most machines report an sversion of 9D. But 715 1064 * and 725 firmware misreport it as 0x08080 for no adequately explained 1065 * reason. 1066 */ 1067 static const struct parisc_device_id dino_tbl[] __initconst = { 1068 { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ 1069 { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ 1070 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ 1071 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ 1072 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ 1073 { 0, } 1074 }; 1075 1076 static struct parisc_driver dino_driver __refdata = { 1077 .name = "dino", 1078 .id_table = dino_tbl, 1079 .probe = dino_probe, 1080 }; 1081 1082 /* 1083 * One time initialization to let the world know Dino is here. 1084 * This is the only routine which is NOT static. 1085 * Must be called exactly once before pci_init(). 1086 */ 1087 void __init dino_init(void) 1088 { 1089 register_parisc_driver(&dino_driver); 1090 } 1091 1092