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 | |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 299 | static void dino_mask_irq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 301 | struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); |
| 302 | int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 304 | DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | /* Clear the matching bit in the IMR register */ |
| 307 | dino_dev->imr &= ~(DINO_MASK_IRQ(local_irq)); |
| 308 | __raw_writel(dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); |
| 309 | } |
| 310 | |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 311 | static void dino_unmask_irq(struct irq_data *d) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 313 | struct dino_device *dino_dev = irq_data_get_irq_chip_data(d); |
| 314 | int local_irq = gsc_find_local_irq(d->irq, dino_dev->global_irq, DINO_LOCAL_IRQS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | u32 tmp; |
| 316 | |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 317 | DBG(KERN_WARNING "%s(0x%p, %d)\n", __func__, dino_dev, d->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
| 319 | /* |
| 320 | ** clear pending IRQ bits |
| 321 | ** |
| 322 | ** This does NOT change ILR state! |
| 323 | ** See comment below for ILR usage. |
| 324 | */ |
| 325 | __raw_readl(dino_dev->hba.base_addr+DINO_IPR); |
| 326 | |
| 327 | /* set the matching bit in the IMR register */ |
| 328 | dino_dev->imr |= DINO_MASK_IRQ(local_irq); /* used in dino_isr() */ |
| 329 | __raw_writel( dino_dev->imr, dino_dev->hba.base_addr+DINO_IMR); |
| 330 | |
| 331 | /* Emulate "Level Triggered" Interrupt |
| 332 | ** Basically, a driver is blowing it if the IRQ line is asserted |
| 333 | ** while the IRQ is disabled. But tulip.c seems to do that.... |
| 334 | ** Give 'em a kluge award and a nice round of applause! |
| 335 | ** |
| 336 | ** The gsc_write will generate an interrupt which invokes dino_isr(). |
| 337 | ** dino_isr() will read IPR and find nothing. But then catch this |
| 338 | ** when it also checks ILR. |
| 339 | */ |
| 340 | tmp = __raw_readl(dino_dev->hba.base_addr+DINO_ILR); |
| 341 | if (tmp & DINO_MASK_IRQ(local_irq)) { |
| 342 | DBG(KERN_WARNING "%s(): IRQ asserted! (ILR 0x%x)\n", |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 343 | __func__, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | gsc_writel(dino_dev->txn_data, dino_dev->txn_addr); |
| 345 | } |
| 346 | } |
| 347 | |
Thomas Gleixner | dfe0756 | 2009-06-10 19:56:04 +0000 | [diff] [blame] | 348 | static struct irq_chip dino_interrupt_type = { |
Thomas Gleixner | 4c4231e | 2011-02-06 20:45:52 +0000 | [diff] [blame] | 349 | .name = "GSC-PCI", |
| 350 | .irq_unmask = dino_unmask_irq, |
| 351 | .irq_mask = dino_mask_irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
| 354 | |
| 355 | /* |
| 356 | * Handle a Processor interrupt generated by Dino. |
| 357 | * |
| 358 | * ilr_loop counter is a kluge to prevent a "stuck" IRQ line from |
| 359 | * wedging the CPU. Could be removed or made optional at some point. |
| 360 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 361 | static irqreturn_t dino_isr(int irq, void *intr_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | { |
| 363 | struct dino_device *dino_dev = intr_dev; |
| 364 | u32 mask; |
| 365 | int ilr_loop = 100; |
| 366 | |
| 367 | /* read and acknowledge pending interrupts */ |
| 368 | #ifdef DINO_DEBUG |
| 369 | dino_dev->dino_irr0 = |
| 370 | #endif |
| 371 | mask = __raw_readl(dino_dev->hba.base_addr+DINO_IRR0) & DINO_IRR_MASK; |
| 372 | |
| 373 | if (mask == 0) |
| 374 | return IRQ_NONE; |
| 375 | |
| 376 | ilr_again: |
| 377 | do { |
| 378 | int local_irq = __ffs(mask); |
| 379 | int irq = dino_dev->global_irq[local_irq]; |
| 380 | DBG(KERN_DEBUG "%s(%d, %p) mask 0x%x\n", |
Harvey Harrison | a8043ec | 2008-05-14 16:21:56 -0700 | [diff] [blame] | 381 | __func__, irq, intr_dev, mask); |
Kyle McMartin | ba20085 | 2010-10-13 21:00:55 -0400 | [diff] [blame] | 382 | generic_handle_irq(irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | mask &= ~(1 << local_irq); |
| 384 | } while (mask); |
| 385 | |
| 386 | /* Support for level triggered IRQ lines. |
| 387 | ** |
| 388 | ** Dropping this support would make this routine *much* faster. |
| 389 | ** But since PCI requires level triggered IRQ line to share lines... |
| 390 | ** device drivers may assume lines are level triggered (and not |
| 391 | ** edge triggered like EISA/ISA can be). |
| 392 | */ |
| 393 | mask = __raw_readl(dino_dev->hba.base_addr+DINO_ILR) & dino_dev->imr; |
| 394 | if (mask) { |
| 395 | if (--ilr_loop > 0) |
| 396 | goto ilr_again; |
| 397 | printk(KERN_ERR "Dino 0x%p: stuck interrupt %d\n", |
| 398 | dino_dev->hba.base_addr, mask); |
| 399 | return IRQ_NONE; |
| 400 | } |
| 401 | return IRQ_HANDLED; |
| 402 | } |
| 403 | |
| 404 | static void dino_assign_irq(struct dino_device *dino, int local_irq, int *irqp) |
| 405 | { |
| 406 | int irq = gsc_assign_irq(&dino_interrupt_type, dino); |
| 407 | if (irq == NO_IRQ) |
| 408 | return; |
| 409 | |
| 410 | *irqp = irq; |
| 411 | dino->global_irq[local_irq] = irq; |
| 412 | } |
| 413 | |
| 414 | static void dino_choose_irq(struct parisc_device *dev, void *ctrl) |
| 415 | { |
| 416 | int irq; |
| 417 | struct dino_device *dino = ctrl; |
| 418 | |
| 419 | switch (dev->id.sversion) { |
| 420 | case 0x00084: irq = 8; break; /* PS/2 */ |
| 421 | case 0x0008c: irq = 10; break; /* RS232 */ |
| 422 | case 0x00096: irq = 8; break; /* PS/2 */ |
| 423 | default: return; /* Unknown */ |
| 424 | } |
| 425 | |
| 426 | dino_assign_irq(dino, irq, &dev->irq); |
| 427 | } |
| 428 | |
Helge Deller | 04d35d7 | 2006-01-10 20:47:50 -0500 | [diff] [blame] | 429 | |
| 430 | /* |
| 431 | * Cirrus 6832 Cardbus reports wrong irq on RDI Tadpole PARISC Laptop (deller@gmx.de) |
| 432 | * (the irqs are off-by-one, not sure yet if this is a cirrus, dino-hardware or dino-driver problem...) |
| 433 | */ |
| 434 | static void __devinit quirk_cirrus_cardbus(struct pci_dev *dev) |
| 435 | { |
| 436 | u8 new_irq = dev->irq - 1; |
| 437 | printk(KERN_INFO "PCI: Cirrus Cardbus IRQ fixup for %s, from %d to %d\n", |
| 438 | pci_name(dev), dev->irq, new_irq); |
| 439 | dev->irq = new_irq; |
| 440 | } |
| 441 | DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_CIRRUS, PCI_DEVICE_ID_CIRRUS_6832, quirk_cirrus_cardbus ); |
| 442 | |
| 443 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | static void __init |
| 445 | dino_bios_init(void) |
| 446 | { |
| 447 | DBG("dino_bios_init\n"); |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * dino_card_setup - Set up the memory space for a Dino in card mode. |
| 452 | * @bus: the bus under this dino |
| 453 | * |
| 454 | * Claim an 8MB chunk of unused IO space and call the generic PCI routines |
| 455 | * to set up the addresses of the devices on this bus. |
| 456 | */ |
| 457 | #define _8MB 0x00800000UL |
| 458 | static void __init |
| 459 | dino_card_setup(struct pci_bus *bus, void __iomem *base_addr) |
| 460 | { |
| 461 | int i; |
| 462 | struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); |
| 463 | struct resource *res; |
| 464 | char name[128]; |
| 465 | int size; |
| 466 | |
| 467 | res = &dino_dev->hba.lmmio_space; |
| 468 | res->flags = IORESOURCE_MEM; |
| 469 | size = scnprintf(name, sizeof(name), "Dino LMMIO (%s)", |
Kay Sievers | d499524 | 2009-01-26 03:53:16 +0000 | [diff] [blame] | 470 | dev_name(bus->bridge)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | res->name = kmalloc(size+1, GFP_KERNEL); |
| 472 | if(res->name) |
| 473 | strcpy((char *)res->name, name); |
| 474 | else |
| 475 | res->name = dino_dev->hba.lmmio_space.name; |
| 476 | |
| 477 | |
| 478 | if (ccio_allocate_resource(dino_dev->hba.dev, res, _8MB, |
| 479 | F_EXTEND(0xf0000000UL) | _8MB, |
| 480 | F_EXTEND(0xffffffffUL) &~ _8MB, _8MB) < 0) { |
| 481 | struct list_head *ln, *tmp_ln; |
| 482 | |
| 483 | printk(KERN_ERR "Dino: cannot attach bus %s\n", |
Kay Sievers | d499524 | 2009-01-26 03:53:16 +0000 | [diff] [blame] | 484 | dev_name(bus->bridge)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | /* kill the bus, we can't do anything with it */ |
| 486 | list_for_each_safe(ln, tmp_ln, &bus->devices) { |
| 487 | struct pci_dev *dev = pci_dev_b(ln); |
| 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | list_del(&dev->bus_list); |
| 490 | } |
| 491 | |
| 492 | return; |
| 493 | } |
| 494 | bus->resource[1] = res; |
| 495 | bus->resource[0] = &(dino_dev->hba.io_space); |
| 496 | |
| 497 | /* Now tell dino what range it has */ |
| 498 | for (i = 1; i < 31; i++) { |
| 499 | if (res->start == F_EXTEND(0xf0000000UL | (i * _8MB))) |
| 500 | break; |
| 501 | } |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 502 | DBG("DINO GSC WRITE i=%d, start=%lx, dino addr = %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | i, res->start, base_addr + DINO_IO_ADDR_EN); |
| 504 | __raw_writel(1 << i, base_addr + DINO_IO_ADDR_EN); |
| 505 | } |
| 506 | |
| 507 | static void __init |
| 508 | dino_card_fixup(struct pci_dev *dev) |
| 509 | { |
| 510 | u32 irq_pin; |
| 511 | |
| 512 | /* |
| 513 | ** REVISIT: card-mode PCI-PCI expansion chassis do exist. |
| 514 | ** Not sure they were ever productized. |
| 515 | ** Die here since we'll die later in dino_inb() anyway. |
| 516 | */ |
| 517 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { |
| 518 | panic("Card-Mode Dino: PCI-PCI Bridge not supported\n"); |
| 519 | } |
| 520 | |
| 521 | /* |
| 522 | ** Set Latency Timer to 0xff (not a shared bus) |
| 523 | ** Set CACHELINE_SIZE. |
| 524 | */ |
| 525 | dino_cfg_write(dev->bus, dev->devfn, |
| 526 | PCI_CACHE_LINE_SIZE, 2, 0xff00 | L1_CACHE_BYTES/4); |
| 527 | |
| 528 | /* |
| 529 | ** Program INT_LINE for card-mode devices. |
| 530 | ** The cards are hardwired according to this algorithm. |
| 531 | ** And it doesn't matter if PPB's are present or not since |
| 532 | ** the IRQ lines bypass the PPB. |
| 533 | ** |
| 534 | ** "-1" converts INTA-D (1-4) to PCIINTA-D (0-3) range. |
| 535 | ** The additional "-1" adjusts for skewing the IRQ<->slot. |
| 536 | */ |
| 537 | 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] | 538 | dev->irq = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | /* Shouldn't really need to do this but it's in case someone tries |
| 541 | ** to bypass PCI services and look at the card themselves. |
| 542 | */ |
| 543 | dino_cfg_write(dev->bus, dev->devfn, PCI_INTERRUPT_LINE, 1, dev->irq); |
| 544 | } |
| 545 | |
| 546 | /* The alignment contraints for PCI bridges under dino */ |
| 547 | #define DINO_BRIDGE_ALIGN 0x100000 |
| 548 | |
| 549 | |
| 550 | static void __init |
| 551 | dino_fixup_bus(struct pci_bus *bus) |
| 552 | { |
| 553 | struct list_head *ln; |
| 554 | struct pci_dev *dev; |
| 555 | struct dino_device *dino_dev = DINO_DEV(parisc_walk_tree(bus->bridge)); |
| 556 | int port_base = HBA_PORT_BASE(dino_dev->hba.hba_num); |
| 557 | |
| 558 | 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] | 559 | __func__, bus, bus->secondary, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | bus->bridge->platform_data); |
| 561 | |
| 562 | /* Firmware doesn't set up card-mode dino, so we have to */ |
| 563 | if (is_card_dino(&dino_dev->hba.dev->id)) { |
| 564 | dino_card_setup(bus, dino_dev->hba.base_addr); |
Grant Grundler | 9785d64 | 2009-01-28 22:30:55 -0700 | [diff] [blame] | 565 | } else if (bus->parent) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | int i; |
| 567 | |
| 568 | pci_read_bridge_bases(bus); |
| 569 | |
| 570 | |
| 571 | for(i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) { |
| 572 | if((bus->self->resource[i].flags & |
| 573 | (IORESOURCE_IO | IORESOURCE_MEM)) == 0) |
| 574 | continue; |
| 575 | |
| 576 | if(bus->self->resource[i].flags & IORESOURCE_MEM) { |
| 577 | /* There's a quirk to alignment of |
| 578 | * bridge memory resources: the start |
| 579 | * is the alignment and start-end is |
| 580 | * the size. However, firmware will |
| 581 | * have assigned start and end, so we |
| 582 | * need to take this into account */ |
| 583 | bus->self->resource[i].end = bus->self->resource[i].end - bus->self->resource[i].start + DINO_BRIDGE_ALIGN; |
| 584 | bus->self->resource[i].start = DINO_BRIDGE_ALIGN; |
| 585 | |
| 586 | } |
| 587 | |
| 588 | DBG("DEBUG %s assigning %d [0x%lx,0x%lx]\n", |
Kay Sievers | d499524 | 2009-01-26 03:53:16 +0000 | [diff] [blame] | 589 | dev_name(&bus->self->dev), i, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | bus->self->resource[i].start, |
| 591 | bus->self->resource[i].end); |
Helge Deller | 1e0deab | 2009-08-02 15:17:37 +0200 | [diff] [blame] | 592 | WARN_ON(pci_assign_resource(bus->self, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | DBG("DEBUG %s after assign %d [0x%lx,0x%lx]\n", |
Kay Sievers | d499524 | 2009-01-26 03:53:16 +0000 | [diff] [blame] | 594 | dev_name(&bus->self->dev), i, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | bus->self->resource[i].start, |
| 596 | bus->self->resource[i].end); |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | |
| 601 | list_for_each(ln, &bus->devices) { |
| 602 | int i; |
| 603 | |
| 604 | dev = pci_dev_b(ln); |
| 605 | if (is_card_dino(&dino_dev->hba.dev->id)) |
| 606 | dino_card_fixup(dev); |
| 607 | |
| 608 | /* |
| 609 | ** P2PB's only have 2 BARs, no IRQs. |
| 610 | ** I'd like to just ignore them for now. |
| 611 | */ |
| 612 | if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) |
| 613 | continue; |
| 614 | |
| 615 | /* Adjust the I/O Port space addresses */ |
| 616 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { |
| 617 | struct resource *res = &dev->resource[i]; |
| 618 | if (res->flags & IORESOURCE_IO) { |
| 619 | res->start |= port_base; |
| 620 | res->end |= port_base; |
| 621 | } |
| 622 | #ifdef __LP64__ |
| 623 | /* Sign Extend MMIO addresses */ |
| 624 | else if (res->flags & IORESOURCE_MEM) { |
| 625 | res->start |= F_EXTEND(0UL); |
| 626 | res->end |= F_EXTEND(0UL); |
| 627 | } |
| 628 | #endif |
| 629 | } |
| 630 | /* null out the ROM resource if there is one (we don't |
| 631 | * care about an expansion rom on parisc, since it |
| 632 | * usually contains (x86) bios code) */ |
| 633 | dev->resource[PCI_ROM_RESOURCE].flags = 0; |
| 634 | |
| 635 | if(dev->irq == 255) { |
| 636 | |
| 637 | #define DINO_FIX_UNASSIGNED_INTERRUPTS |
| 638 | #ifdef DINO_FIX_UNASSIGNED_INTERRUPTS |
| 639 | |
| 640 | /* This code tries to assign an unassigned |
| 641 | * interrupt. Leave it disabled unless you |
| 642 | * *really* know what you're doing since the |
| 643 | * pin<->interrupt line mapping varies by bus |
| 644 | * and machine */ |
| 645 | |
| 646 | u32 irq_pin; |
| 647 | |
| 648 | dino_cfg_read(dev->bus, dev->devfn, |
| 649 | PCI_INTERRUPT_PIN, 1, &irq_pin); |
Bjorn Helgaas | f0e88af | 2008-12-09 16:12:22 -0700 | [diff] [blame] | 650 | irq_pin = pci_swizzle_interrupt_pin(dev, irq_pin) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | printk(KERN_WARNING "Device %s has undefined IRQ, " |
| 652 | "setting to %d\n", pci_name(dev), irq_pin); |
| 653 | dino_cfg_write(dev->bus, dev->devfn, |
| 654 | PCI_INTERRUPT_LINE, 1, irq_pin); |
| 655 | dino_assign_irq(dino_dev, irq_pin, &dev->irq); |
| 656 | #else |
| 657 | dev->irq = 65535; |
| 658 | printk(KERN_WARNING "Device %s has unassigned IRQ\n", pci_name(dev)); |
| 659 | #endif |
| 660 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | /* Adjust INT_LINE for that busses region */ |
| 662 | dino_assign_irq(dino_dev, dev->irq, &dev->irq); |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | |
Adrian Bunk | df8e5bc | 2008-12-02 03:28:16 +0000 | [diff] [blame] | 668 | static struct pci_bios_ops dino_bios_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | .init = dino_bios_init, |
| 670 | .fixup_bus = dino_fixup_bus |
| 671 | }; |
| 672 | |
| 673 | |
| 674 | /* |
| 675 | * Initialise a DINO controller chip |
| 676 | */ |
| 677 | static void __init |
| 678 | dino_card_init(struct dino_device *dino_dev) |
| 679 | { |
| 680 | u32 brdg_feat = 0x00784e05; |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 681 | unsigned long status; |
| 682 | |
| 683 | status = __raw_readl(dino_dev->hba.base_addr+DINO_IO_STATUS); |
| 684 | if (status & 0x0000ff80) { |
| 685 | __raw_writel(0x00000005, |
| 686 | dino_dev->hba.base_addr+DINO_IO_COMMAND); |
| 687 | udelay(1); |
| 688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
| 690 | __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_GMASK); |
| 691 | __raw_writel(0x00000001, dino_dev->hba.base_addr+DINO_IO_FBB_EN); |
| 692 | __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_ICR); |
| 693 | |
| 694 | #if 1 |
| 695 | /* REVISIT - should be a runtime check (eg if (CPU_IS_PCX_L) ...) */ |
| 696 | /* |
| 697 | ** PCX-L processors don't support XQL like Dino wants it. |
| 698 | ** PCX-L2 ignore XQL signal and it doesn't matter. |
| 699 | */ |
| 700 | brdg_feat &= ~0x4; /* UXQL */ |
| 701 | #endif |
| 702 | __raw_writel( brdg_feat, dino_dev->hba.base_addr+DINO_BRDG_FEAT); |
| 703 | |
| 704 | /* |
| 705 | ** Don't enable address decoding until we know which I/O range |
| 706 | ** currently is available from the host. Only affects MMIO |
| 707 | ** and not I/O port space. |
| 708 | */ |
| 709 | __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_IO_ADDR_EN); |
| 710 | |
| 711 | __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_DAMODE); |
| 712 | __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR); |
| 713 | __raw_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR); |
| 714 | |
| 715 | __raw_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM); |
| 716 | __raw_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL); |
| 717 | __raw_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM); |
| 718 | |
| 719 | /* Disable PAMR before writing PAPR */ |
| 720 | __raw_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR); |
| 721 | __raw_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR); |
| 722 | __raw_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR); |
| 723 | |
| 724 | /* |
| 725 | ** Dino ERS encourages enabling FBB (0x6f). |
| 726 | ** We can't until we know *all* devices below us can support it. |
| 727 | ** (Something in device configuration header tells us). |
| 728 | */ |
| 729 | __raw_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD); |
| 730 | |
| 731 | /* Somewhere, the PCI spec says give devices 1 second |
| 732 | ** to recover from the #RESET being de-asserted. |
| 733 | ** Experience shows most devices only need 10ms. |
| 734 | ** This short-cut speeds up booting significantly. |
| 735 | */ |
| 736 | mdelay(pci_post_reset_delay); |
| 737 | } |
| 738 | |
| 739 | static int __init |
| 740 | dino_bridge_init(struct dino_device *dino_dev, const char *name) |
| 741 | { |
| 742 | unsigned long io_addr; |
| 743 | int result, i, count=0; |
| 744 | struct resource *res, *prevres = NULL; |
| 745 | /* |
| 746 | * Decoding IO_ADDR_EN only works for Built-in Dino |
| 747 | * since PDC has already initialized this. |
| 748 | */ |
| 749 | |
| 750 | io_addr = __raw_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN); |
| 751 | if (io_addr == 0) { |
| 752 | printk(KERN_WARNING "%s: No PCI devices enabled.\n", name); |
| 753 | return -ENODEV; |
| 754 | } |
| 755 | |
| 756 | res = &dino_dev->hba.lmmio_space; |
| 757 | for (i = 0; i < 32; i++) { |
| 758 | unsigned long start, end; |
| 759 | |
| 760 | if((io_addr & (1 << i)) == 0) |
| 761 | continue; |
| 762 | |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 763 | start = F_EXTEND(0xf0000000UL) | (i << 23); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | end = start + 8 * 1024 * 1024 - 1; |
| 765 | |
| 766 | DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count, |
| 767 | start, end); |
| 768 | |
| 769 | if(prevres && prevres->end + 1 == start) { |
| 770 | prevres->end = end; |
| 771 | } else { |
| 772 | if(count >= DINO_MAX_LMMIO_RESOURCES) { |
| 773 | printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end); |
| 774 | break; |
| 775 | } |
| 776 | prevres = res; |
| 777 | res->start = start; |
| 778 | res->end = end; |
| 779 | res->flags = IORESOURCE_MEM; |
| 780 | res->name = kmalloc(64, GFP_KERNEL); |
| 781 | if(res->name) |
| 782 | snprintf((char *)res->name, 64, "%s LMMIO %d", |
| 783 | name, count); |
| 784 | res++; |
| 785 | count++; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | res = &dino_dev->hba.lmmio_space; |
| 790 | |
| 791 | for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) { |
| 792 | if(res[i].flags == 0) |
| 793 | break; |
| 794 | |
| 795 | result = ccio_request_resource(dino_dev->hba.dev, &res[i]); |
| 796 | if (result < 0) { |
Alexander Beregalov | c18b460 | 2009-03-19 10:54:07 +0000 | [diff] [blame] | 797 | printk(KERN_ERR "%s: failed to claim PCI Bus address " |
| 798 | "space %d (0x%lx-0x%lx)!\n", name, i, |
| 799 | (unsigned long)res[i].start, (unsigned long)res[i].end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | return result; |
| 801 | } |
| 802 | } |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | static int __init dino_common_init(struct parisc_device *dev, |
| 807 | struct dino_device *dino_dev, const char *name) |
| 808 | { |
| 809 | int status; |
| 810 | u32 eim; |
| 811 | struct gsc_irq gsc_irq; |
| 812 | struct resource *res; |
| 813 | |
| 814 | pcibios_register_hba(&dino_dev->hba); |
| 815 | |
| 816 | pci_bios = &dino_bios_ops; /* used by pci_scan_bus() */ |
| 817 | pci_port = &dino_port_ops; |
| 818 | |
| 819 | /* |
| 820 | ** Note: SMP systems can make use of IRR1/IAR1 registers |
| 821 | ** But it won't buy much performance except in very |
| 822 | ** specific applications/configurations. Note Dino |
| 823 | ** still only has 11 IRQ input lines - just map some of them |
| 824 | ** to a different processor. |
| 825 | */ |
| 826 | dev->irq = gsc_alloc_irq(&gsc_irq); |
| 827 | dino_dev->txn_addr = gsc_irq.txn_addr; |
| 828 | dino_dev->txn_data = gsc_irq.txn_data; |
| 829 | eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data; |
| 830 | |
| 831 | /* |
| 832 | ** Dino needs a PA "IRQ" to get a processor's attention. |
| 833 | ** arch/parisc/kernel/irq.c returns an EIRR bit. |
| 834 | */ |
| 835 | if (dev->irq < 0) { |
| 836 | printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name); |
| 837 | return 1; |
| 838 | } |
| 839 | |
| 840 | status = request_irq(dev->irq, dino_isr, 0, name, dino_dev); |
| 841 | if (status) { |
| 842 | printk(KERN_WARNING "%s: request_irq() failed with %d\n", |
| 843 | name, status); |
| 844 | return 1; |
| 845 | } |
| 846 | |
| 847 | /* Support the serial port which is sometimes attached on built-in |
| 848 | * Dino / Cujo chips. |
| 849 | */ |
| 850 | |
| 851 | gsc_fixup_irqs(dev, dino_dev, dino_choose_irq); |
| 852 | |
| 853 | /* |
| 854 | ** This enables DINO to generate interrupts when it sees |
| 855 | ** any of its inputs *change*. Just asserting an IRQ |
| 856 | ** before it's enabled (ie unmasked) isn't good enough. |
| 857 | */ |
| 858 | __raw_writel(eim, dino_dev->hba.base_addr+DINO_IAR0); |
| 859 | |
| 860 | /* |
| 861 | ** Some platforms don't clear Dino's IRR0 register at boot time. |
| 862 | ** Reading will clear it now. |
| 863 | */ |
| 864 | __raw_readl(dino_dev->hba.base_addr+DINO_IRR0); |
| 865 | |
| 866 | /* allocate I/O Port resource region */ |
| 867 | res = &dino_dev->hba.io_space; |
Matthew Wilcox | f45adcf | 2006-01-10 20:48:06 -0500 | [diff] [blame] | 868 | if (!is_cujo(&dev->id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | res->name = "Dino I/O Port"; |
| 870 | } else { |
| 871 | res->name = "Cujo I/O Port"; |
| 872 | } |
| 873 | res->start = HBA_PORT_BASE(dino_dev->hba.hba_num); |
| 874 | res->end = res->start + (HBA_PORT_SPACE_SIZE - 1); |
| 875 | res->flags = IORESOURCE_IO; /* do not mark it busy ! */ |
| 876 | if (request_resource(&ioport_resource, res) < 0) { |
| 877 | printk(KERN_ERR "%s: request I/O Port region failed " |
| 878 | "0x%lx/%lx (hpa 0x%p)\n", |
Alexander Beregalov | c18b460 | 2009-03-19 10:54:07 +0000 | [diff] [blame] | 879 | name, (unsigned long)res->start, (unsigned long)res->end, |
| 880 | dino_dev->hba.base_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | return 1; |
| 882 | } |
| 883 | |
| 884 | return 0; |
| 885 | } |
| 886 | |
| 887 | #define CUJO_RAVEN_ADDR F_EXTEND(0xf1000000UL) |
| 888 | #define CUJO_FIREHAWK_ADDR F_EXTEND(0xf1604000UL) |
| 889 | #define CUJO_RAVEN_BADPAGE 0x01003000UL |
| 890 | #define CUJO_FIREHAWK_BADPAGE 0x01607000UL |
| 891 | |
| 892 | static const char *dino_vers[] = { |
| 893 | "2.0", |
| 894 | "2.1", |
| 895 | "3.0", |
| 896 | "3.1" |
| 897 | }; |
| 898 | |
| 899 | static const char *cujo_vers[] = { |
| 900 | "1.0", |
| 901 | "2.0" |
| 902 | }; |
| 903 | |
| 904 | void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp); |
| 905 | |
| 906 | /* |
| 907 | ** Determine if dino should claim this chip (return 0) or not (return 1). |
| 908 | ** If so, initialize the chip appropriately (card-mode vs bridge mode). |
| 909 | ** Much of the initialization is common though. |
| 910 | */ |
Matthew Wilcox | 53f01bb | 2005-10-21 22:36:40 -0400 | [diff] [blame] | 911 | static int __init dino_probe(struct parisc_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | { |
| 913 | struct dino_device *dino_dev; // Dino specific control struct |
| 914 | const char *version = "unknown"; |
| 915 | char *name; |
| 916 | int is_cujo = 0; |
Bjorn Helgaas | 7590e50 | 2011-10-28 16:27:12 -0600 | [diff] [blame] | 917 | LIST_HEAD(resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | struct pci_bus *bus; |
Matthew Wilcox | 53f01bb | 2005-10-21 22:36:40 -0400 | [diff] [blame] | 919 | unsigned long hpa = dev->hpa.start; |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | name = "Dino"; |
| 922 | if (is_card_dino(&dev->id)) { |
| 923 | version = "3.x (card mode)"; |
| 924 | } else { |
Matthew Wilcox | f45adcf | 2006-01-10 20:48:06 -0500 | [diff] [blame] | 925 | if (!is_cujo(&dev->id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | if (dev->id.hversion_rev < 4) { |
| 927 | version = dino_vers[dev->id.hversion_rev]; |
| 928 | } |
| 929 | } else { |
| 930 | name = "Cujo"; |
| 931 | is_cujo = 1; |
| 932 | if (dev->id.hversion_rev < 2) { |
| 933 | version = cujo_vers[dev->id.hversion_rev]; |
| 934 | } |
| 935 | } |
| 936 | } |
| 937 | |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 938 | printk("%s version %s found at 0x%lx\n", name, version, hpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 940 | if (!request_mem_region(hpa, PAGE_SIZE, name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | 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] | 942 | hpa); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | return 1; |
| 944 | } |
| 945 | |
| 946 | /* Check for bugs */ |
| 947 | if (is_cujo && dev->id.hversion_rev == 1) { |
| 948 | #ifdef CONFIG_IOMMU_CCIO |
| 949 | printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n"); |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 950 | if (hpa == (unsigned long)CUJO_RAVEN_ADDR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | ccio_cujo20_fixup(dev, CUJO_RAVEN_BADPAGE); |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 952 | } else if (hpa == (unsigned long)CUJO_FIREHAWK_ADDR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | ccio_cujo20_fixup(dev, CUJO_FIREHAWK_BADPAGE); |
| 954 | } else { |
Matthew Wilcox | 92b919f | 2005-10-21 22:38:23 -0400 | [diff] [blame] | 955 | 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] | 956 | } |
| 957 | #endif |
| 958 | } else if (!is_cujo && !is_card_dino(&dev->id) && |
| 959 | dev->id.hversion_rev < 3) { |
| 960 | printk(KERN_WARNING |
| 961 | "The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n" |
| 962 | "data corruption. See Service Note Numbers: A4190A-01, A4191A-01.\n" |
| 963 | "Systems shipped after Aug 20, 1997 will not exhibit this problem.\n" |
| 964 | "Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n", |
| 965 | dev->id.hversion_rev); |
| 966 | /* REVISIT: why are C200/C240 listed in the README table but not |
| 967 | ** "Models affected"? Could be an omission in the original literature. |
| 968 | */ |
| 969 | } |
| 970 | |
Helge Deller | cb6fc18 | 2006-01-17 12:40:40 -0700 | [diff] [blame] | 971 | dino_dev = kzalloc(sizeof(struct dino_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (!dino_dev) { |
| 973 | printk("dino_init_chip - couldn't alloc dino_device\n"); |
| 974 | return 1; |
| 975 | } |
| 976 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | dino_dev->hba.dev = dev; |
Helge Deller | 5076c15 | 2006-03-27 12:52:15 -0700 | [diff] [blame] | 978 | dino_dev->hba.base_addr = ioremap_nocache(hpa, 4096); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | dino_dev->hba.lmmio_space_offset = 0; /* CPU addrs == bus addrs */ |
| 980 | spin_lock_init(&dino_dev->dinosaur_pen); |
| 981 | dino_dev->hba.iommu = ccio_get_iommu(dev); |
| 982 | |
| 983 | if (is_card_dino(&dev->id)) { |
| 984 | dino_card_init(dino_dev); |
| 985 | } else { |
| 986 | dino_bridge_init(dino_dev, name); |
| 987 | } |
| 988 | |
| 989 | if (dino_common_init(dev, dino_dev, name)) |
| 990 | return 1; |
| 991 | |
| 992 | dev->dev.platform_data = dino_dev; |
| 993 | |
Bjorn Helgaas | 7590e50 | 2011-10-28 16:27:12 -0600 | [diff] [blame] | 994 | pci_add_resource(&resources, &dino_dev->hba.io_space); |
| 995 | if (dino_dev->hba.lmmio_space.flags) |
| 996 | pci_add_resource(&resources, &dino_dev->hba.lmmio_space); |
| 997 | if (dino_dev->hba.elmmio_space.flags) |
| 998 | pci_add_resource(&resources, &dino_dev->hba.elmmio_space); |
| 999 | if (dino_dev->hba.gmmio_space.flags) |
| 1000 | pci_add_resource(&resources, &dino_dev->hba.gmmio_space); |
| 1001 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | /* |
| 1003 | ** It's not used to avoid chicken/egg problems |
| 1004 | ** with configuration accessor functions. |
| 1005 | */ |
Bjorn Helgaas | 7590e50 | 2011-10-28 16:27:12 -0600 | [diff] [blame] | 1006 | dino_dev->hba.hba_bus = bus = pci_create_root_bus(&dev->dev, |
| 1007 | dino_current_bus, &dino_cfg_ops, NULL, &resources); |
Bjorn Helgaas | c4e0657 | 2011-10-28 16:27:07 -0600 | [diff] [blame] | 1008 | if (!bus) { |
Grant Grundler | fed99b1 | 2009-04-20 04:28:22 +0000 | [diff] [blame] | 1009 | printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (duplicate bus number %d?)\n", |
Kay Sievers | d499524 | 2009-01-26 03:53:16 +0000 | [diff] [blame] | 1010 | dev_name(&dev->dev), dino_current_bus); |
Bjorn Helgaas | 7590e50 | 2011-10-28 16:27:12 -0600 | [diff] [blame] | 1011 | pci_free_resource_list(&resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | /* increment the bus number in case of duplicates */ |
| 1013 | dino_current_bus++; |
Bjorn Helgaas | c4e0657 | 2011-10-28 16:27:07 -0600 | [diff] [blame] | 1014 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
Bjorn Helgaas | c4e0657 | 2011-10-28 16:27:07 -0600 | [diff] [blame] | 1016 | |
| 1017 | bus->subordinate = pci_scan_child_bus(bus); |
| 1018 | |
| 1019 | /* This code *depends* on scanning being single threaded |
| 1020 | * if it isn't, this global bus number count will fail |
| 1021 | */ |
| 1022 | dino_current_bus = bus->subordinate + 1; |
| 1023 | pci_bus_assign_resources(bus); |
| 1024 | pci_bus_add_devices(bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | return 0; |
| 1026 | } |
| 1027 | |
| 1028 | /* |
| 1029 | * Normally, we would just test sversion. But the Elroy PCI adapter has |
| 1030 | * the same sversion as Dino, so we have to check hversion as well. |
| 1031 | * Unfortunately, the J2240 PDC reports the wrong hversion for the first |
| 1032 | * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240. |
| 1033 | * For card-mode Dino, most machines report an sversion of 9D. But 715 |
| 1034 | * and 725 firmware misreport it as 0x08080 for no adequately explained |
| 1035 | * reason. |
| 1036 | */ |
| 1037 | static struct parisc_device_id dino_tbl[] = { |
| 1038 | { HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */ |
| 1039 | { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */ |
| 1040 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */ |
| 1041 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */ |
| 1042 | { HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */ |
| 1043 | { 0, } |
| 1044 | }; |
| 1045 | |
| 1046 | static struct parisc_driver dino_driver = { |
Matthew Wilcox | bdad1f8 | 2005-10-21 22:36:23 -0400 | [diff] [blame] | 1047 | .name = "dino", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | .id_table = dino_tbl, |
Matthew Wilcox | bdad1f8 | 2005-10-21 22:36:23 -0400 | [diff] [blame] | 1049 | .probe = dino_probe, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | }; |
| 1051 | |
| 1052 | /* |
| 1053 | * One time initialization to let the world know Dino is here. |
| 1054 | * This is the only routine which is NOT static. |
| 1055 | * Must be called exactly once before pci_init(). |
| 1056 | */ |
| 1057 | int __init dino_init(void) |
| 1058 | { |
| 1059 | register_parisc_driver(&dino_driver); |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |