Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 8 | ** (c) Copyright 2006 Helge Deller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Matthew Wilcox | f45adcf | 2006-01-10 20:48:06 -0500 | [diff] [blame] | 86 | #define is_card_dino(id) ((id)->hw_type == HPHW_A_DMA) |
| 87 | #define is_cujo(id) ((id)->hversion == 0x682) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Helge Deller | 4d64c9f | 2006-01-10 20:47:54 -0500 | [diff] [blame] | 128 | #define DINO_LOCAL_IRQS (DINO_IRQS+1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Helge Deller | 4d64c9f | 2006-01-10 20:47:54 -0500 | [diff] [blame] | 151 | int global_irq[DINO_LOCAL_IRQS]; /* map IMR bit to global irq */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 183 | DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 184 | size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 218 | DBG("%s: %p, %d, %d, %d\n", __func__, base_addr, devfn, where, |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 219 | size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Adrian Bunk | df8e5bc | 2008-12-02 03:28:16 +0000 | [diff] [blame] | 290 | static struct pci_port_ops dino_port_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 301 | struct irq_desc *desc = irq_to_desc(irq); |
| 302 | struct dino_device *dino_dev = desc->chip_data; |
Helge Deller | 4d64c9f | 2006-01-10 20:47:54 -0500 | [diff] [blame] | 303 | int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 305 | DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Yinghai Lu | 08678b0 | 2008-08-19 20:50:05 -0700 | [diff] [blame] | 314 | struct irq_desc *desc = irq_to_desc(irq); |
| 315 | struct dino_device *dino_dev = desc->chip_data; |
Helge Deller | 4d64c9f | 2006-01-10 20:47:54 -0500 | [diff] [blame] | 316 | int local_irq = gsc_find_local_irq(irq, dino_dev->global_irq, DINO_LOCAL_IRQS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | u32 tmp; |
| 318 | |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 319 | DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 345 | __func__, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 hw_interrupt_type dino_interrupt_type = { |
| 357 | .typename = "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 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 373 | static irqreturn_t dino_isr(int irq, void *intr_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 393 | __func__, irq, intr_dev, mask); |
Matthew Wilcox | be577a5 | 2006-10-06 20:47:23 -0600 | [diff] [blame] | 394 | __do_IRQ(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Helge Deller | 04d35d7 | 2006-01-10 20:47:50 -0500 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | bus->bridge->bus_id); |
| 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 | bus->bridge->bus_id); |
| 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 514 | DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Bjorn Helgaas | f0e88af | 2008-12-09 16:12:22 -0700 | [diff] [blame] | 550 | dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 571 | __func__, bus, bus->secondary, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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->self) { |
| 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 | bus->self->dev.bus_id, i, |
| 615 | bus->self->resource[i].start, |
| 616 | bus->self->resource[i].end); |
| 617 | pci_assign_resource(bus->self, i); |
| 618 | DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n", |
| 619 | bus->self->dev.bus_id, 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); |
Bjorn Helgaas | f0e88af | 2008-12-09 16:12:22 -0700 | [diff] [blame] | 675 | irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | /* Adjust INT_LINE for that busses region */ |
| 687 | dino_assign_irq(dino_dev, dev->irq, &dev->irq); |
| 688 | } |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | |
Adrian Bunk | df8e5bc | 2008-12-02 03:28:16 +0000 | [diff] [blame] | 693 | static struct pci_bios_ops dino_bios_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 788 | start = F_EXTEND(0xf0000000UL) | (i << 23); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 space %d (0x%lx-0x%lx)!\n", name, i, res[i].start, res[i].end); |
| 823 | return result; |
| 824 | } |
| 825 | } |
| 826 | return 0; |
| 827 | } |
| 828 | |
| 829 | static int __init dino_common_init(struct parisc_device *dev, |
| 830 | struct dino_device *dino_dev, const char *name) |
| 831 | { |
| 832 | int status; |
| 833 | u32 eim; |
| 834 | struct gsc_irq gsc_irq; |
| 835 | struct resource *res; |
| 836 | |
| 837 | pcibios_register_hba(&dino_dev->hba); |
| 838 | |
| 839 | pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */ |
| 840 | pci_port = &dino_port_ops; |
| 841 | |
| 842 | /* |
| 843 | ** Note: SMP systems can make use of IRR1/IAR1 registers |
| 844 | ** But it won't buy much performance except in very |
| 845 | ** specific applications/configurations. Note Dino |
| 846 | ** still only has 11 IRQ input lines - just map some of them |
| 847 | ** to a different processor. |
| 848 | */ |
| 849 | dev->irq = gsc_alloc_irq(&gsc_irq); |
| 850 | dino_dev->txn_addr = gsc_irq.txn_addr; |
| 851 | dino_dev->txn_data = gsc_irq.txn_data; |
| 852 | eim = ((u32) gsc_irq.txn_addr) | 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; |
Matthew Wilcox | f45adcf | 2006-01-10 20:48:06 -0500 | [diff] [blame] | 891 | if (!is_cujo(&dev->id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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%p)\n", |
| 902 | name, res->start, res->end, dino_dev->hba.base_addr); |
| 903 | return 1; |
| 904 | } |
| 905 | |
| 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) |
| 910 | #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) |
| 911 | #define CUJO_RAVEN_BADPAGE 0x01003000UL |
| 912 | #define CUJO_FIREHAWK_BADPAGE 0x01607000UL |
| 913 | |
| 914 | static const char *dino_vers[] = { |
| 915 | "2.0", |
| 916 | "2.1", |
| 917 | "3.0", |
| 918 | "3.1" |
| 919 | }; |
| 920 | |
| 921 | static const char *cujo_vers[] = { |
| 922 | "1.0", |
| 923 | "2.0" |
| 924 | }; |
| 925 | |
| 926 | void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); |
| 927 | |
| 928 | /* |
| 929 | ** Determine if dino should claim this chip (return 0) or not (return 1). |
| 930 | ** If so, initialize the chip appropriately (card-mode vs bridge mode). |
| 931 | ** Much of the initialization is common though. |
| 932 | */ |
Matthew Wilcox | 53f01bb | 2005-10-21 22:36:40 -0400 | [diff] [blame] | 933 | static int __init dino_probe(struct parisc_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | { |
| 935 | struct dino_device *dino_dev; // Dino specific control struct |
| 936 | const char *version = "unknown"; |
| 937 | char *name; |
| 938 | int is_cujo = 0; |
| 939 | struct pci_bus *bus; |
Matthew Wilcox | 53f01bb | 2005-10-21 22:36:40 -0400 | [diff] [blame] | 940 | unsigned long hpa = dev->hpa.start; |
| 941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | name = "Dino"; |
| 943 | if (is_card_dino(&dev->id)) { |
| 944 | version = "3.x (card mode)"; |
| 945 | } else { |
Matthew Wilcox | f45adcf | 2006-01-10 20:48:06 -0500 | [diff] [blame] | 946 | if (!is_cujo(&dev->id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if (dev->id.hversion_rev < 4) { |
| 948 | version = dino_vers[dev->id.hversion_rev]; |
| 949 | } |
| 950 | } else { |
| 951 | name = "Cujo"; |
| 952 | is_cujo = 1; |
| 953 | if (dev->id.hversion_rev < 2) { |
| 954 | version = cujo_vers[dev->id.hversion_rev]; |
| 955 | } |
| 956 | } |
| 957 | } |
| 958 | |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 959 | printk("%s version %s found at 0x%lx\n", name, version, hpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 961 | if (!request_mem_region(hpa, PAGE_SIZE, name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n", |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 963 | hpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | return 1; |
| 965 | } |
| 966 | |
| 967 | /* Check for bugs */ |
| 968 | if (is_cujo && dev->id.hversion_rev == 1) { |
| 969 | #ifdef CONFIG_IOMMU_CCIO |
| 970 | printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 971 | if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 973 | } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); |
| 975 | } else { |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 976 | printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", hpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | #endif |
| 979 | } else if (!is_cujo && !is_card_dino(&dev->id) && |
| 980 | dev->id.hversion_rev < 3) { |
| 981 | printk(KERN_WARNING |
| 982 | "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" |
| 983 | "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" |
| 984 | "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" |
| 985 | "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", |
| 986 | dev->id.hversion_rev); |
| 987 | /* REVISIT: why are C200/C240 listed in the README table but not |
| 988 | ** "Models affected"? Could be an omission in the original literature. |
| 989 | */ |
| 990 | } |
| 991 | |
Helge Deller | cb6fc18 | 2006-01-17 12:40:40 -0700 | [diff] [blame] | 992 | dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | if (!dino_dev) { |
| 994 | printk("dino_init_chip - couldn't alloc dino_device\n"); |
| 995 | return 1; |
| 996 | } |
| 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | dino_dev->hba.dev = dev; |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 999 | dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */ |
| 1001 | spin_lock_init(&dino_dev->dinosaur_pen); |
| 1002 | dino_dev->hba.iommu = ccio_get_iommu(dev); |
| 1003 | |
| 1004 | if (is_card_dino(&dev->id)) { |
| 1005 | dino_card_init(dino_dev); |
| 1006 | } else { |
| 1007 | dino_bridge_init(dino_dev, name); |
| 1008 | } |
| 1009 | |
| 1010 | if (dino_common_init(dev, dino_dev, name)) |
| 1011 | return 1; |
| 1012 | |
| 1013 | dev->dev.platform_data = dino_dev; |
| 1014 | |
| 1015 | /* |
| 1016 | ** It's not used to avoid chicken/egg problems |
| 1017 | ** with configuration accessor functions. |
| 1018 | */ |
| 1019 | bus = pci_scan_bus_parented(&dev->dev, dino_current_bus, |
| 1020 | &dino_cfg_ops, NULL); |
| 1021 | if(bus) { |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 1022 | pci_bus_add_devices(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | /* This code *depends* on scanning being single threaded |
| 1024 | * if it isn't, this global bus number count will fail |
| 1025 | */ |
| 1026 | dino_current_bus = bus->subordinate + 1; |
| 1027 | pci_bus_assign_resources(bus); |
| 1028 | } else { |
| 1029 | printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus); |
| 1030 | /* increment the bus number in case of duplicates */ |
| 1031 | dino_current_bus++; |
| 1032 | } |
| 1033 | dino_dev->hba.hba_bus = bus; |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * Normally, we would just test sversion. But the Elroy PCI adapter has |
| 1039 | * the same sversion as Dino, so we have to check hversion as well. |
| 1040 | * Unfortunately, the J2240 PDC reports the wrong hversion for the first |
| 1041 | * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. |
| 1042 | * For card-mode Dino, most machines report an sversion of 9D. But 715 |
| 1043 | * and 725 firmware misreport it as 0x08080 for no adequately explained |
| 1044 | * reason. |
| 1045 | */ |
| 1046 | static struct parisc_device_id dino_tbl[] = { |
| 1047 | { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ |
| 1048 | { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ |
| 1049 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ |
| 1050 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ |
| 1051 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ |
| 1052 | { 0, } |
| 1053 | }; |
| 1054 | |
| 1055 | static struct parisc_driver dino_driver = { |
Matthew Wilcox | bdad1f8 | 2005-10-21 22:36:23 -0400 | [diff] [blame] | 1056 | .name = "dino", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | .id_table = dino_tbl, |
Matthew Wilcox | bdad1f8 | 2005-10-21 22:36:23 -0400 | [diff] [blame] | 1058 | .probe = dino_probe, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | }; |
| 1060 | |
| 1061 | /* |
| 1062 | * One time initialization to let the world know Dino is here. |
| 1063 | * This is the only routine which is NOT static. |
| 1064 | * Must be called exactly once before pci_init(). |
| 1065 | */ |
| 1066 | int __init dino_init(void) |
| 1067 | { |
| 1068 | register_parisc_driver(&dino_driver); |
| 1069 | return 0; |
| 1070 | } |
| 1071 | |