1 /* 2 * ebus.c: PCI to EBus bridge device. 3 * 4 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) 5 * 6 * Adopted for sparc by V. Roganov and G. Raiko. 7 * Fixes for different platforms by Pete Zaitcev. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/types.h> 12 #include <linux/init.h> 13 #include <linux/slab.h> 14 #include <linux/string.h> 15 16 #include <asm/system.h> 17 #include <asm/page.h> 18 #include <asm/pbm.h> 19 #include <asm/ebus.h> 20 #include <asm/io.h> 21 #include <asm/oplib.h> 22 #include <asm/prom.h> 23 #include <asm/bpp.h> 24 25 struct linux_ebus *ebus_chain = NULL; 26 27 /* We are together with pcic.c under CONFIG_PCI. */ 28 extern unsigned int pcic_pin_to_irq(unsigned int, const char *name); 29 30 /* 31 * IRQ Blacklist 32 * Here we list PROMs and systems that are known to supply crap as IRQ numbers. 33 */ 34 struct ebus_device_irq { 35 char *name; 36 unsigned int pin; 37 }; 38 39 struct ebus_system_entry { 40 char *esname; 41 struct ebus_device_irq *ipt; 42 }; 43 44 static struct ebus_device_irq je1_1[] = { 45 { "8042", 3 }, 46 { "SUNW,CS4231", 0 }, 47 { "parallel", 0 }, 48 { "se", 2 }, 49 { NULL, 0 } 50 }; 51 52 /* 53 * Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32). 54 * Blacklist the sucker... Note that Gleb's system will work. 55 */ 56 static struct ebus_system_entry ebus_blacklist[] = { 57 { "SUNW,JavaEngine1", je1_1 }, 58 { NULL, NULL } 59 }; 60 61 static struct ebus_device_irq *ebus_blackp = NULL; 62 63 /* 64 */ 65 static inline unsigned long ebus_alloc(size_t size) 66 { 67 return (unsigned long)kmalloc(size, GFP_ATOMIC); 68 } 69 70 /* 71 */ 72 static int __init ebus_blacklist_irq(const char *name) 73 { 74 struct ebus_device_irq *dp; 75 76 if ((dp = ebus_blackp) != NULL) { 77 for (; dp->name != NULL; dp++) { 78 if (strcmp(name, dp->name) == 0) { 79 return pcic_pin_to_irq(dp->pin, name); 80 } 81 } 82 } 83 return 0; 84 } 85 86 static void __init fill_ebus_child(struct device_node *dp, 87 struct linux_ebus_child *dev) 88 { 89 const int *regs; 90 const int *irqs; 91 int i, len; 92 93 dev->prom_node = dp; 94 regs = of_get_property(dp, "reg", &len); 95 if (!regs) 96 len = 0; 97 dev->num_addrs = len / sizeof(regs[0]); 98 99 for (i = 0; i < dev->num_addrs; i++) { 100 if (regs[i] >= dev->parent->num_addrs) { 101 prom_printf("UGH: property for %s was %d, need < %d\n", 102 dev->prom_node->name, len, 103 dev->parent->num_addrs); 104 panic(__func__); 105 } 106 107 /* XXX resource */ 108 dev->resource[i].start = 109 dev->parent->resource[regs[i]].start; 110 } 111 112 for (i = 0; i < PROMINTR_MAX; i++) 113 dev->irqs[i] = PCI_IRQ_NONE; 114 115 if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) { 116 dev->num_irqs = 1; 117 } else { 118 irqs = of_get_property(dp, "interrupts", &len); 119 if (!irqs) { 120 dev->num_irqs = 0; 121 dev->irqs[0] = 0; 122 if (dev->parent->num_irqs != 0) { 123 dev->num_irqs = 1; 124 dev->irqs[0] = dev->parent->irqs[0]; 125 } 126 } else { 127 dev->num_irqs = len / sizeof(irqs[0]); 128 if (irqs[0] == 0 || irqs[0] >= 8) { 129 /* 130 * XXX Zero is a valid pin number... 131 * This works as long as Ebus is not wired 132 * to INTA#. 133 */ 134 printk("EBUS: %s got bad irq %d from PROM\n", 135 dev->prom_node->name, irqs[0]); 136 dev->num_irqs = 0; 137 dev->irqs[0] = 0; 138 } else { 139 dev->irqs[0] = 140 pcic_pin_to_irq(irqs[0], 141 dev->prom_node->name); 142 } 143 } 144 } 145 } 146 147 static void __init fill_ebus_device(struct device_node *dp, 148 struct linux_ebus_device *dev) 149 { 150 const struct linux_prom_registers *regs; 151 struct linux_ebus_child *child; 152 struct dev_archdata *sd; 153 const int *irqs; 154 int i, n, len; 155 unsigned long baseaddr; 156 157 dev->prom_node = dp; 158 159 regs = of_get_property(dp, "reg", &len); 160 if (!regs) 161 len = 0; 162 if (len % sizeof(struct linux_prom_registers)) { 163 prom_printf("UGH: proplen for %s was %d, need multiple of %d\n", 164 dev->prom_node->name, len, 165 (int)sizeof(struct linux_prom_registers)); 166 panic(__func__); 167 } 168 dev->num_addrs = len / sizeof(struct linux_prom_registers); 169 170 for (i = 0; i < dev->num_addrs; i++) { 171 /* 172 * XXX Collect JE-1 PROM 173 * 174 * Example - JS-E with 3.11: 175 * /ebus 176 * regs 177 * 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000, 178 * 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000, 179 * 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000, 180 * ranges 181 * 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000, 182 * 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000, 183 * /ebus/8042 184 * regs 185 * 0x00000001, 0x00300060, 0x00000008, 186 * 0x00000001, 0x00300060, 0x00000008, 187 */ 188 n = regs[i].which_io; 189 if (n >= 4) { 190 /* XXX This is copied from old JE-1 by Gleb. */ 191 n = (regs[i].which_io - 0x10) >> 2; 192 } else { 193 ; 194 } 195 196 /* 197 * XXX Now as we have regions, why don't we make an on-demand allocation... 198 */ 199 dev->resource[i].start = 0; 200 if ((baseaddr = dev->bus->self->resource[n].start + 201 regs[i].phys_addr) != 0) { 202 /* dev->resource[i].name = dev->prom_name; */ 203 if ((baseaddr = (unsigned long) ioremap(baseaddr, 204 regs[i].reg_size)) == 0) { 205 panic("ebus: unable to remap dev %s", 206 dev->prom_node->name); 207 } 208 } 209 dev->resource[i].start = baseaddr; /* XXX Unaligned */ 210 } 211 212 for (i = 0; i < PROMINTR_MAX; i++) 213 dev->irqs[i] = PCI_IRQ_NONE; 214 215 if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) { 216 dev->num_irqs = 1; 217 } else { 218 irqs = of_get_property(dp, "interrupts", &len); 219 if (!irqs) { 220 dev->num_irqs = 0; 221 if ((dev->irqs[0] = dev->bus->self->irq) != 0) { 222 dev->num_irqs = 1; 223 /* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */ 224 } 225 } else { 226 dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */ 227 if (irqs[0] == 0 || irqs[0] >= 8) { 228 /* See above for the parent. XXX */ 229 printk("EBUS: %s got bad irq %d from PROM\n", 230 dev->prom_node->name, irqs[0]); 231 dev->num_irqs = 0; 232 dev->irqs[0] = 0; 233 } else { 234 dev->irqs[0] = 235 pcic_pin_to_irq(irqs[0], 236 dev->prom_node->name); 237 } 238 } 239 } 240 241 sd = &dev->ofdev.dev.archdata; 242 sd->prom_node = dp; 243 sd->op = &dev->ofdev; 244 sd->iommu = dev->bus->ofdev.dev.parent->archdata.iommu; 245 246 dev->ofdev.node = dp; 247 dev->ofdev.dev.parent = &dev->bus->ofdev.dev; 248 dev->ofdev.dev.bus = &ebus_bus_type; 249 sprintf(dev->ofdev.dev.bus_id, "ebus[%08x]", dp->node); 250 251 /* Register with core */ 252 if (of_device_register(&dev->ofdev) != 0) 253 printk(KERN_DEBUG "ebus: device registration error for %s!\n", 254 dp->path_component_name); 255 256 if ((dp = dp->child) != NULL) { 257 dev->children = (struct linux_ebus_child *) 258 ebus_alloc(sizeof(struct linux_ebus_child)); 259 260 child = dev->children; 261 child->next = NULL; 262 child->parent = dev; 263 child->bus = dev->bus; 264 fill_ebus_child(dp, child); 265 266 while ((dp = dp->sibling) != NULL) { 267 child->next = (struct linux_ebus_child *) 268 ebus_alloc(sizeof(struct linux_ebus_child)); 269 270 child = child->next; 271 child->next = NULL; 272 child->parent = dev; 273 child->bus = dev->bus; 274 fill_ebus_child(dp, child); 275 } 276 } 277 } 278 279 void __init ebus_init(void) 280 { 281 const struct linux_prom_pci_registers *regs; 282 struct linux_pbm_info *pbm; 283 struct linux_ebus_device *dev; 284 struct linux_ebus *ebus; 285 struct ebus_system_entry *sp; 286 struct pci_dev *pdev; 287 struct pcidev_cookie *cookie; 288 struct device_node *dp; 289 struct resource *p; 290 unsigned short pci_command; 291 int len, reg, nreg; 292 int num_ebus = 0; 293 294 dp = of_find_node_by_path("/"); 295 for (sp = ebus_blacklist; sp->esname != NULL; sp++) { 296 if (strcmp(dp->name, sp->esname) == 0) { 297 ebus_blackp = sp->ipt; 298 break; 299 } 300 } 301 302 pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL); 303 if (!pdev) 304 return; 305 306 cookie = pdev->sysdata; 307 dp = cookie->prom_node; 308 309 ebus_chain = ebus = (struct linux_ebus *) 310 ebus_alloc(sizeof(struct linux_ebus)); 311 ebus->next = NULL; 312 313 while (dp) { 314 struct device_node *nd; 315 316 ebus->prom_node = dp; 317 ebus->self = pdev; 318 ebus->parent = pbm = cookie->pbm; 319 320 /* Enable BUS Master. */ 321 pci_read_config_word(pdev, PCI_COMMAND, &pci_command); 322 pci_command |= PCI_COMMAND_MASTER; 323 pci_write_config_word(pdev, PCI_COMMAND, pci_command); 324 325 regs = of_get_property(dp, "reg", &len); 326 if (!regs) { 327 prom_printf("%s: can't find reg property\n", 328 __func__); 329 prom_halt(); 330 } 331 nreg = len / sizeof(struct linux_prom_pci_registers); 332 333 p = &ebus->self->resource[0]; 334 for (reg = 0; reg < nreg; reg++) { 335 if (!(regs[reg].which_io & 0x03000000)) 336 continue; 337 338 (p++)->start = regs[reg].phys_lo; 339 } 340 341 ebus->ofdev.node = dp; 342 ebus->ofdev.dev.parent = &pdev->dev; 343 ebus->ofdev.dev.bus = &ebus_bus_type; 344 sprintf(ebus->ofdev.dev.bus_id, "ebus%d", num_ebus); 345 346 /* Register with core */ 347 if (of_device_register(&ebus->ofdev) != 0) 348 printk(KERN_DEBUG "ebus: device registration error for %s!\n", 349 dp->path_component_name); 350 351 352 nd = dp->child; 353 if (!nd) 354 goto next_ebus; 355 356 ebus->devices = (struct linux_ebus_device *) 357 ebus_alloc(sizeof(struct linux_ebus_device)); 358 359 dev = ebus->devices; 360 dev->next = NULL; 361 dev->children = NULL; 362 dev->bus = ebus; 363 fill_ebus_device(nd, dev); 364 365 while ((nd = nd->sibling) != NULL) { 366 dev->next = (struct linux_ebus_device *) 367 ebus_alloc(sizeof(struct linux_ebus_device)); 368 369 dev = dev->next; 370 dev->next = NULL; 371 dev->children = NULL; 372 dev->bus = ebus; 373 fill_ebus_device(nd, dev); 374 } 375 376 next_ebus: 377 pdev = pci_get_device(PCI_VENDOR_ID_SUN, 378 PCI_DEVICE_ID_SUN_EBUS, pdev); 379 if (!pdev) 380 break; 381 382 cookie = pdev->sysdata; 383 dp = cookie->prom_node; 384 385 ebus->next = (struct linux_ebus *) 386 ebus_alloc(sizeof(struct linux_ebus)); 387 ebus = ebus->next; 388 ebus->next = NULL; 389 ++num_ebus; 390 } 391 if (pdev) 392 pci_dev_put(pdev); 393 } 394