1 /* 2 * Support for the interrupt controllers found on Power Macintosh, 3 * currently Apple's "Grand Central" interrupt controller in all 4 * it's incarnations. OpenPIC support used on newer machines is 5 * in a separate file 6 * 7 * Copyright (C) 1997 Paul Mackerras (paulus@samba.org) 8 * 9 * Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org) 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 * 16 */ 17 18 #include <linux/config.h> 19 #include <linux/stddef.h> 20 #include <linux/init.h> 21 #include <linux/sched.h> 22 #include <linux/signal.h> 23 #include <linux/pci.h> 24 #include <linux/interrupt.h> 25 #include <linux/sysdev.h> 26 #include <linux/adb.h> 27 #include <linux/pmu.h> 28 #include <linux/module.h> 29 30 #include <asm/sections.h> 31 #include <asm/io.h> 32 #include <asm/smp.h> 33 #include <asm/prom.h> 34 #include <asm/pci-bridge.h> 35 #include <asm/time.h> 36 #include <asm/pmac_feature.h> 37 #include <asm/mpic.h> 38 39 #include "pmac.h" 40 41 /* 42 * XXX this should be in xmon.h, but putting it there means xmon.h 43 * has to include <linux/interrupt.h> (to get irqreturn_t), which 44 * causes all sorts of problems. -- paulus 45 */ 46 extern irqreturn_t xmon_irq(int, void *, struct pt_regs *); 47 48 #ifdef CONFIG_PPC32 49 struct pmac_irq_hw { 50 unsigned int event; 51 unsigned int enable; 52 unsigned int ack; 53 unsigned int level; 54 }; 55 56 /* Default addresses */ 57 static volatile struct pmac_irq_hw *pmac_irq_hw[4] = { 58 (struct pmac_irq_hw *) 0xf3000020, 59 (struct pmac_irq_hw *) 0xf3000010, 60 (struct pmac_irq_hw *) 0xf4000020, 61 (struct pmac_irq_hw *) 0xf4000010, 62 }; 63 64 #define GC_LEVEL_MASK 0x3ff00000 65 #define OHARE_LEVEL_MASK 0x1ff00000 66 #define HEATHROW_LEVEL_MASK 0x1ff00000 67 68 static int max_irqs; 69 static int max_real_irqs; 70 static u32 level_mask[4]; 71 72 static DEFINE_SPINLOCK(pmac_pic_lock); 73 74 #define GATWICK_IRQ_POOL_SIZE 10 75 static struct interrupt_info gatwick_int_pool[GATWICK_IRQ_POOL_SIZE]; 76 77 #define NR_MASK_WORDS ((NR_IRQS + 31) / 32) 78 static unsigned long ppc_lost_interrupts[NR_MASK_WORDS]; 79 80 /* 81 * Mark an irq as "lost". This is only used on the pmac 82 * since it can lose interrupts (see pmac_set_irq_mask). 83 * -- Cort 84 */ 85 void 86 __set_lost(unsigned long irq_nr, int nokick) 87 { 88 if (!test_and_set_bit(irq_nr, ppc_lost_interrupts)) { 89 atomic_inc(&ppc_n_lost_interrupts); 90 if (!nokick) 91 set_dec(1); 92 } 93 } 94 95 static void 96 pmac_mask_and_ack_irq(unsigned int irq_nr) 97 { 98 unsigned long bit = 1UL << (irq_nr & 0x1f); 99 int i = irq_nr >> 5; 100 unsigned long flags; 101 102 if ((unsigned)irq_nr >= max_irqs) 103 return; 104 105 clear_bit(irq_nr, ppc_cached_irq_mask); 106 if (test_and_clear_bit(irq_nr, ppc_lost_interrupts)) 107 atomic_dec(&ppc_n_lost_interrupts); 108 spin_lock_irqsave(&pmac_pic_lock, flags); 109 out_le32(&pmac_irq_hw[i]->enable, ppc_cached_irq_mask[i]); 110 out_le32(&pmac_irq_hw[i]->ack, bit); 111 do { 112 /* make sure ack gets to controller before we enable 113 interrupts */ 114 mb(); 115 } while((in_le32(&pmac_irq_hw[i]->enable) & bit) 116 != (ppc_cached_irq_mask[i] & bit)); 117 spin_unlock_irqrestore(&pmac_pic_lock, flags); 118 } 119 120 static void pmac_set_irq_mask(unsigned int irq_nr, int nokicklost) 121 { 122 unsigned long bit = 1UL << (irq_nr & 0x1f); 123 int i = irq_nr >> 5; 124 unsigned long flags; 125 126 if ((unsigned)irq_nr >= max_irqs) 127 return; 128 129 spin_lock_irqsave(&pmac_pic_lock, flags); 130 /* enable unmasked interrupts */ 131 out_le32(&pmac_irq_hw[i]->enable, ppc_cached_irq_mask[i]); 132 133 do { 134 /* make sure mask gets to controller before we 135 return to user */ 136 mb(); 137 } while((in_le32(&pmac_irq_hw[i]->enable) & bit) 138 != (ppc_cached_irq_mask[i] & bit)); 139 140 /* 141 * Unfortunately, setting the bit in the enable register 142 * when the device interrupt is already on *doesn't* set 143 * the bit in the flag register or request another interrupt. 144 */ 145 if (bit & ppc_cached_irq_mask[i] & in_le32(&pmac_irq_hw[i]->level)) 146 __set_lost((ulong)irq_nr, nokicklost); 147 spin_unlock_irqrestore(&pmac_pic_lock, flags); 148 } 149 150 /* When an irq gets requested for the first client, if it's an 151 * edge interrupt, we clear any previous one on the controller 152 */ 153 static unsigned int pmac_startup_irq(unsigned int irq_nr) 154 { 155 unsigned long bit = 1UL << (irq_nr & 0x1f); 156 int i = irq_nr >> 5; 157 158 if ((irq_desc[irq_nr].status & IRQ_LEVEL) == 0) 159 out_le32(&pmac_irq_hw[i]->ack, bit); 160 set_bit(irq_nr, ppc_cached_irq_mask); 161 pmac_set_irq_mask(irq_nr, 0); 162 163 return 0; 164 } 165 166 static void pmac_mask_irq(unsigned int irq_nr) 167 { 168 clear_bit(irq_nr, ppc_cached_irq_mask); 169 pmac_set_irq_mask(irq_nr, 0); 170 mb(); 171 } 172 173 static void pmac_unmask_irq(unsigned int irq_nr) 174 { 175 set_bit(irq_nr, ppc_cached_irq_mask); 176 pmac_set_irq_mask(irq_nr, 0); 177 } 178 179 static void pmac_end_irq(unsigned int irq_nr) 180 { 181 if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS)) 182 && irq_desc[irq_nr].action) { 183 set_bit(irq_nr, ppc_cached_irq_mask); 184 pmac_set_irq_mask(irq_nr, 1); 185 } 186 } 187 188 189 struct hw_interrupt_type pmac_pic = { 190 .typename = " PMAC-PIC ", 191 .startup = pmac_startup_irq, 192 .enable = pmac_unmask_irq, 193 .disable = pmac_mask_irq, 194 .ack = pmac_mask_and_ack_irq, 195 .end = pmac_end_irq, 196 }; 197 198 struct hw_interrupt_type gatwick_pic = { 199 .typename = " GATWICK ", 200 .startup = pmac_startup_irq, 201 .enable = pmac_unmask_irq, 202 .disable = pmac_mask_irq, 203 .ack = pmac_mask_and_ack_irq, 204 .end = pmac_end_irq, 205 }; 206 207 static irqreturn_t gatwick_action(int cpl, void *dev_id, struct pt_regs *regs) 208 { 209 int irq, bits; 210 211 for (irq = max_irqs; (irq -= 32) >= max_real_irqs; ) { 212 int i = irq >> 5; 213 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i]; 214 /* We must read level interrupts from the level register */ 215 bits |= (in_le32(&pmac_irq_hw[i]->level) & level_mask[i]); 216 bits &= ppc_cached_irq_mask[i]; 217 if (bits == 0) 218 continue; 219 irq += __ilog2(bits); 220 __do_IRQ(irq, regs); 221 return IRQ_HANDLED; 222 } 223 printk("gatwick irq not from gatwick pic\n"); 224 return IRQ_NONE; 225 } 226 227 int 228 pmac_get_irq(struct pt_regs *regs) 229 { 230 int irq; 231 unsigned long bits = 0; 232 233 #ifdef CONFIG_SMP 234 void psurge_smp_message_recv(struct pt_regs *); 235 236 /* IPI's are a hack on the powersurge -- Cort */ 237 if ( smp_processor_id() != 0 ) { 238 psurge_smp_message_recv(regs); 239 return -2; /* ignore, already handled */ 240 } 241 #endif /* CONFIG_SMP */ 242 for (irq = max_real_irqs; (irq -= 32) >= 0; ) { 243 int i = irq >> 5; 244 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i]; 245 /* We must read level interrupts from the level register */ 246 bits |= (in_le32(&pmac_irq_hw[i]->level) & level_mask[i]); 247 bits &= ppc_cached_irq_mask[i]; 248 if (bits == 0) 249 continue; 250 irq += __ilog2(bits); 251 break; 252 } 253 254 return irq; 255 } 256 257 /* This routine will fix some missing interrupt values in the device tree 258 * on the gatwick mac-io controller used by some PowerBooks 259 */ 260 static void __init 261 pmac_fix_gatwick_interrupts(struct device_node *gw, int irq_base) 262 { 263 struct device_node *node; 264 int count; 265 266 memset(gatwick_int_pool, 0, sizeof(gatwick_int_pool)); 267 node = gw->child; 268 count = 0; 269 while(node) 270 { 271 /* Fix SCC */ 272 if (strcasecmp(node->name, "escc") == 0) 273 if (node->child) { 274 if (node->child->n_intrs < 3) { 275 node->child->intrs = &gatwick_int_pool[count]; 276 count += 3; 277 } 278 node->child->n_intrs = 3; 279 node->child->intrs[0].line = 15+irq_base; 280 node->child->intrs[1].line = 4+irq_base; 281 node->child->intrs[2].line = 5+irq_base; 282 printk(KERN_INFO "irq: fixed SCC on second controller (%d,%d,%d)\n", 283 node->child->intrs[0].line, 284 node->child->intrs[1].line, 285 node->child->intrs[2].line); 286 } 287 /* Fix media-bay & left SWIM */ 288 if (strcasecmp(node->name, "media-bay") == 0) { 289 struct device_node* ya_node; 290 291 if (node->n_intrs == 0) 292 node->intrs = &gatwick_int_pool[count++]; 293 node->n_intrs = 1; 294 node->intrs[0].line = 29+irq_base; 295 printk(KERN_INFO "irq: fixed media-bay on second controller (%d)\n", 296 node->intrs[0].line); 297 298 ya_node = node->child; 299 while(ya_node) 300 { 301 if (strcasecmp(ya_node->name, "floppy") == 0) { 302 if (ya_node->n_intrs < 2) { 303 ya_node->intrs = &gatwick_int_pool[count]; 304 count += 2; 305 } 306 ya_node->n_intrs = 2; 307 ya_node->intrs[0].line = 19+irq_base; 308 ya_node->intrs[1].line = 1+irq_base; 309 printk(KERN_INFO "irq: fixed floppy on second controller (%d,%d)\n", 310 ya_node->intrs[0].line, ya_node->intrs[1].line); 311 } 312 if (strcasecmp(ya_node->name, "ata4") == 0) { 313 if (ya_node->n_intrs < 2) { 314 ya_node->intrs = &gatwick_int_pool[count]; 315 count += 2; 316 } 317 ya_node->n_intrs = 2; 318 ya_node->intrs[0].line = 14+irq_base; 319 ya_node->intrs[1].line = 3+irq_base; 320 printk(KERN_INFO "irq: fixed ide on second controller (%d,%d)\n", 321 ya_node->intrs[0].line, ya_node->intrs[1].line); 322 } 323 ya_node = ya_node->sibling; 324 } 325 } 326 node = node->sibling; 327 } 328 if (count > 10) { 329 printk("WARNING !! Gatwick interrupt pool overflow\n"); 330 printk(" GATWICK_IRQ_POOL_SIZE = %d\n", GATWICK_IRQ_POOL_SIZE); 331 printk(" requested = %d\n", count); 332 } 333 } 334 335 /* 336 * The PowerBook 3400/2400/3500 can have a combo ethernet/modem 337 * card which includes an ohare chip that acts as a second interrupt 338 * controller. If we find this second ohare, set it up and fix the 339 * interrupt value in the device tree for the ethernet chip. 340 */ 341 static int __init enable_second_ohare(void) 342 { 343 unsigned char bus, devfn; 344 unsigned short cmd; 345 unsigned long addr; 346 struct device_node *irqctrler = find_devices("pci106b,7"); 347 struct device_node *ether; 348 349 if (irqctrler == NULL || irqctrler->n_addrs <= 0) 350 return -1; 351 addr = (unsigned long) ioremap(irqctrler->addrs[0].address, 0x40); 352 pmac_irq_hw[1] = (volatile struct pmac_irq_hw *)(addr + 0x20); 353 max_irqs = 64; 354 if (pci_device_from_OF_node(irqctrler, &bus, &devfn) == 0) { 355 struct pci_controller* hose = pci_find_hose_for_OF_device(irqctrler); 356 if (!hose) 357 printk(KERN_ERR "Can't find PCI hose for OHare2 !\n"); 358 else { 359 early_read_config_word(hose, bus, devfn, PCI_COMMAND, &cmd); 360 cmd |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER; 361 cmd &= ~PCI_COMMAND_IO; 362 early_write_config_word(hose, bus, devfn, PCI_COMMAND, cmd); 363 } 364 } 365 366 /* Fix interrupt for the modem/ethernet combo controller. The number 367 in the device tree (27) is bogus (correct for the ethernet-only 368 board but not the combo ethernet/modem board). 369 The real interrupt is 28 on the second controller -> 28+32 = 60. 370 */ 371 ether = find_devices("pci1011,14"); 372 if (ether && ether->n_intrs > 0) { 373 ether->intrs[0].line = 60; 374 printk(KERN_INFO "irq: Fixed ethernet IRQ to %d\n", 375 ether->intrs[0].line); 376 } 377 378 /* Return the interrupt number of the cascade */ 379 return irqctrler->intrs[0].line; 380 } 381 382 #ifdef CONFIG_XMON 383 static struct irqaction xmon_action = { 384 .handler = xmon_irq, 385 .flags = 0, 386 .mask = CPU_MASK_NONE, 387 .name = "NMI - XMON" 388 }; 389 #endif 390 391 static struct irqaction gatwick_cascade_action = { 392 .handler = gatwick_action, 393 .flags = SA_INTERRUPT, 394 .mask = CPU_MASK_NONE, 395 .name = "cascade", 396 }; 397 #endif /* CONFIG_PPC32 */ 398 399 static int pmac_u3_cascade(struct pt_regs *regs, void *data) 400 { 401 return mpic_get_one_irq((struct mpic *)data, regs); 402 } 403 404 void __init pmac_pic_init(void) 405 { 406 struct device_node *irqctrler = NULL; 407 struct device_node *irqctrler2 = NULL; 408 struct device_node *np; 409 #ifdef CONFIG_PPC32 410 int i; 411 unsigned long addr; 412 int irq_cascade = -1; 413 #endif 414 struct mpic *mpic1, *mpic2; 415 416 /* We first try to detect Apple's new Core99 chipset, since mac-io 417 * is quite different on those machines and contains an IBM MPIC2. 418 */ 419 np = find_type_devices("open-pic"); 420 while (np) { 421 if (np->parent && !strcmp(np->parent->name, "u3")) 422 irqctrler2 = np; 423 else 424 irqctrler = np; 425 np = np->next; 426 } 427 if (irqctrler != NULL && irqctrler->n_addrs > 0) { 428 unsigned char senses[128]; 429 430 printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n", 431 (unsigned int)irqctrler->addrs[0].address); 432 pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler, 0, 0); 433 434 prom_get_irq_senses(senses, 0, 128); 435 mpic1 = mpic_alloc(irqctrler->addrs[0].address, 436 MPIC_PRIMARY | MPIC_WANTS_RESET, 437 0, 0, 128, 252, senses, 128, " OpenPIC "); 438 BUG_ON(mpic1 == NULL); 439 mpic_init(mpic1); 440 441 if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 && 442 irqctrler2->n_addrs > 0) { 443 printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n", 444 (u32)irqctrler2->addrs[0].address, 445 irqctrler2->intrs[0].line); 446 447 pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0); 448 prom_get_irq_senses(senses, 128, 128 + 124); 449 450 /* We don't need to set MPIC_BROKEN_U3 here since we don't have 451 * hypertransport interrupts routed to it 452 */ 453 mpic2 = mpic_alloc(irqctrler2->addrs[0].address, 454 MPIC_BIG_ENDIAN | MPIC_WANTS_RESET, 455 0, 128, 124, 0, senses, 124, 456 " U3-MPIC "); 457 BUG_ON(mpic2 == NULL); 458 mpic_init(mpic2); 459 mpic_setup_cascade(irqctrler2->intrs[0].line, 460 pmac_u3_cascade, mpic2); 461 } 462 #ifdef CONFIG_XMON 463 { 464 struct device_node* pswitch; 465 int nmi_irq; 466 467 pswitch = find_devices("programmer-switch"); 468 if (pswitch && pswitch->n_intrs) { 469 nmi_irq = pswitch->intrs[0].line; 470 mpic_irq_set_priority(nmi_irq, 9); 471 setup_irq(nmi_irq, &xmon_action); 472 } 473 } 474 #endif /* CONFIG_XMON */ 475 return; 476 } 477 irqctrler = NULL; 478 479 #ifdef CONFIG_PPC32 480 /* Get the level/edge settings, assume if it's not 481 * a Grand Central nor an OHare, then it's an Heathrow 482 * (or Paddington). 483 */ 484 ppc_md.get_irq = pmac_get_irq; 485 if (find_devices("gc")) 486 level_mask[0] = GC_LEVEL_MASK; 487 else if (find_devices("ohare")) { 488 level_mask[0] = OHARE_LEVEL_MASK; 489 /* We might have a second cascaded ohare */ 490 level_mask[1] = OHARE_LEVEL_MASK; 491 } else { 492 level_mask[0] = HEATHROW_LEVEL_MASK; 493 level_mask[1] = 0; 494 /* We might have a second cascaded heathrow */ 495 level_mask[2] = HEATHROW_LEVEL_MASK; 496 level_mask[3] = 0; 497 } 498 499 /* 500 * G3 powermacs and 1999 G3 PowerBooks have 64 interrupts, 501 * 1998 G3 Series PowerBooks have 128, 502 * other powermacs have 32. 503 * The combo ethernet/modem card for the Powerstar powerbooks 504 * (2400/3400/3500, ohare based) has a second ohare chip 505 * effectively making a total of 64. 506 */ 507 max_irqs = max_real_irqs = 32; 508 irqctrler = find_devices("mac-io"); 509 if (irqctrler) 510 { 511 max_real_irqs = 64; 512 if (irqctrler->next) 513 max_irqs = 128; 514 else 515 max_irqs = 64; 516 } 517 for ( i = 0; i < max_real_irqs ; i++ ) 518 irq_desc[i].handler = &pmac_pic; 519 520 /* get addresses of first controller */ 521 if (irqctrler) { 522 if (irqctrler->n_addrs > 0) { 523 addr = (unsigned long) 524 ioremap(irqctrler->addrs[0].address, 0x40); 525 for (i = 0; i < 2; ++i) 526 pmac_irq_hw[i] = (volatile struct pmac_irq_hw*) 527 (addr + (2 - i) * 0x10); 528 } 529 530 /* get addresses of second controller */ 531 irqctrler = irqctrler->next; 532 if (irqctrler && irqctrler->n_addrs > 0) { 533 addr = (unsigned long) 534 ioremap(irqctrler->addrs[0].address, 0x40); 535 for (i = 2; i < 4; ++i) 536 pmac_irq_hw[i] = (volatile struct pmac_irq_hw*) 537 (addr + (4 - i) * 0x10); 538 irq_cascade = irqctrler->intrs[0].line; 539 if (device_is_compatible(irqctrler, "gatwick")) 540 pmac_fix_gatwick_interrupts(irqctrler, max_real_irqs); 541 } 542 } else { 543 /* older powermacs have a GC (grand central) or ohare at 544 f3000000, with interrupt control registers at f3000020. */ 545 addr = (unsigned long) ioremap(0xf3000000, 0x40); 546 pmac_irq_hw[0] = (volatile struct pmac_irq_hw *) (addr + 0x20); 547 } 548 549 /* PowerBooks 3400 and 3500 can have a second controller in a second 550 ohare chip, on the combo ethernet/modem card */ 551 if (machine_is_compatible("AAPL,3400/2400") 552 || machine_is_compatible("AAPL,3500")) 553 irq_cascade = enable_second_ohare(); 554 555 /* disable all interrupts in all controllers */ 556 for (i = 0; i * 32 < max_irqs; ++i) 557 out_le32(&pmac_irq_hw[i]->enable, 0); 558 /* mark level interrupts */ 559 for (i = 0; i < max_irqs; i++) 560 if (level_mask[i >> 5] & (1UL << (i & 0x1f))) 561 irq_desc[i].status = IRQ_LEVEL; 562 563 /* get interrupt line of secondary interrupt controller */ 564 if (irq_cascade >= 0) { 565 printk(KERN_INFO "irq: secondary controller on irq %d\n", 566 (int)irq_cascade); 567 for ( i = max_real_irqs ; i < max_irqs ; i++ ) 568 irq_desc[i].handler = &gatwick_pic; 569 setup_irq(irq_cascade, &gatwick_cascade_action); 570 } 571 printk("System has %d possible interrupts\n", max_irqs); 572 if (max_irqs != max_real_irqs) 573 printk(KERN_DEBUG "%d interrupts on main controller\n", 574 max_real_irqs); 575 576 #ifdef CONFIG_XMON 577 setup_irq(20, &xmon_action); 578 #endif /* CONFIG_XMON */ 579 #endif /* CONFIG_PPC32 */ 580 } 581 582 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 583 /* 584 * These procedures are used in implementing sleep on the powerbooks. 585 * sleep_save_intrs() saves the states of all interrupt enables 586 * and disables all interrupts except for the nominated one. 587 * sleep_restore_intrs() restores the states of all interrupt enables. 588 */ 589 unsigned long sleep_save_mask[2]; 590 591 /* This used to be passed by the PMU driver but that link got 592 * broken with the new driver model. We use this tweak for now... 593 */ 594 static int pmacpic_find_viaint(void) 595 { 596 int viaint = -1; 597 598 #ifdef CONFIG_ADB_PMU 599 struct device_node *np; 600 601 if (pmu_get_model() != PMU_OHARE_BASED) 602 goto not_found; 603 np = of_find_node_by_name(NULL, "via-pmu"); 604 if (np == NULL) 605 goto not_found; 606 viaint = np->intrs[0].line; 607 #endif /* CONFIG_ADB_PMU */ 608 609 not_found: 610 return viaint; 611 } 612 613 static int pmacpic_suspend(struct sys_device *sysdev, pm_message_t state) 614 { 615 int viaint = pmacpic_find_viaint(); 616 617 sleep_save_mask[0] = ppc_cached_irq_mask[0]; 618 sleep_save_mask[1] = ppc_cached_irq_mask[1]; 619 ppc_cached_irq_mask[0] = 0; 620 ppc_cached_irq_mask[1] = 0; 621 if (viaint > 0) 622 set_bit(viaint, ppc_cached_irq_mask); 623 out_le32(&pmac_irq_hw[0]->enable, ppc_cached_irq_mask[0]); 624 if (max_real_irqs > 32) 625 out_le32(&pmac_irq_hw[1]->enable, ppc_cached_irq_mask[1]); 626 (void)in_le32(&pmac_irq_hw[0]->event); 627 /* make sure mask gets to controller before we return to caller */ 628 mb(); 629 (void)in_le32(&pmac_irq_hw[0]->enable); 630 631 return 0; 632 } 633 634 static int pmacpic_resume(struct sys_device *sysdev) 635 { 636 int i; 637 638 out_le32(&pmac_irq_hw[0]->enable, 0); 639 if (max_real_irqs > 32) 640 out_le32(&pmac_irq_hw[1]->enable, 0); 641 mb(); 642 for (i = 0; i < max_real_irqs; ++i) 643 if (test_bit(i, sleep_save_mask)) 644 pmac_unmask_irq(i); 645 646 return 0; 647 } 648 649 #endif /* CONFIG_PM && CONFIG_PPC32 */ 650 651 static struct sysdev_class pmacpic_sysclass = { 652 set_kset_name("pmac_pic"), 653 }; 654 655 static struct sys_device device_pmacpic = { 656 .id = 0, 657 .cls = &pmacpic_sysclass, 658 }; 659 660 static struct sysdev_driver driver_pmacpic = { 661 #if defined(CONFIG_PM) && defined(CONFIG_PPC32) 662 .suspend = &pmacpic_suspend, 663 .resume = &pmacpic_resume, 664 #endif /* CONFIG_PM && CONFIG_PPC32 */ 665 }; 666 667 static int __init init_pmacpic_sysfs(void) 668 { 669 #ifdef CONFIG_PPC32 670 if (max_irqs == 0) 671 return -ENODEV; 672 #endif 673 printk(KERN_DEBUG "Registering pmac pic with sysfs...\n"); 674 sysdev_class_register(&pmacpic_sysclass); 675 sysdev_register(&device_pmacpic); 676 sysdev_driver_register(&pmacpic_sysclass, &driver_pmacpic); 677 return 0; 678 } 679 680 subsys_initcall(init_pmacpic_sysfs); 681 682