1 /* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $ 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 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 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(__FUNCTION__); 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 void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev) 148 { 149 const struct linux_prom_registers *regs; 150 struct linux_ebus_child *child; 151 struct dev_archdata *sd; 152 const int *irqs; 153 int i, n, len; 154 unsigned long baseaddr; 155 156 dev->prom_node = dp; 157 158 regs = of_get_property(dp, "reg", &len); 159 if (len % sizeof(struct linux_prom_registers)) { 160 prom_printf("UGH: proplen for %s was %d, need multiple of %d\n", 161 dev->prom_node->name, len, 162 (int)sizeof(struct linux_prom_registers)); 163 panic(__FUNCTION__); 164 } 165 dev->num_addrs = len / sizeof(struct linux_prom_registers); 166 167 for (i = 0; i < dev->num_addrs; i++) { 168 /* 169 * XXX Collect JE-1 PROM 170 * 171 * Example - JS-E with 3.11: 172 * /ebus 173 * regs 174 * 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000, 175 * 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000, 176 * 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000, 177 * ranges 178 * 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000, 179 * 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000, 180 * /ebus/8042 181 * regs 182 * 0x00000001, 0x00300060, 0x00000008, 183 * 0x00000001, 0x00300060, 0x00000008, 184 */ 185 n = regs[i].which_io; 186 if (n >= 4) { 187 /* XXX This is copied from old JE-1 by Gleb. */ 188 n = (regs[i].which_io - 0x10) >> 2; 189 } else { 190 ; 191 } 192 193 /* 194 * XXX Now as we have regions, why don't we make an on-demand allocation... 195 */ 196 dev->resource[i].start = 0; 197 if ((baseaddr = dev->bus->self->resource[n].start + 198 regs[i].phys_addr) != 0) { 199 /* dev->resource[i].name = dev->prom_name; */ 200 if ((baseaddr = (unsigned long) ioremap(baseaddr, 201 regs[i].reg_size)) == 0) { 202 panic("ebus: unable to remap dev %s", 203 dev->prom_node->name); 204 } 205 } 206 dev->resource[i].start = baseaddr; /* XXX Unaligned */ 207 } 208 209 for (i = 0; i < PROMINTR_MAX; i++) 210 dev->irqs[i] = PCI_IRQ_NONE; 211 212 if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) { 213 dev->num_irqs = 1; 214 } else { 215 irqs = of_get_property(dp, "interrupts", &len); 216 if (!irqs) { 217 dev->num_irqs = 0; 218 if ((dev->irqs[0] = dev->bus->self->irq) != 0) { 219 dev->num_irqs = 1; 220 /* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */ 221 } 222 } else { 223 dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */ 224 if (irqs[0] == 0 || irqs[0] >= 8) { 225 /* See above for the parent. XXX */ 226 printk("EBUS: %s got bad irq %d from PROM\n", 227 dev->prom_node->name, irqs[0]); 228 dev->num_irqs = 0; 229 dev->irqs[0] = 0; 230 } else { 231 dev->irqs[0] = 232 pcic_pin_to_irq(irqs[0], 233 dev->prom_node->name); 234 } 235 } 236 } 237 238 sd = &dev->ofdev.dev.archdata; 239 sd->prom_node = dp; 240 sd->op = &dev->ofdev; 241 242 dev->ofdev.node = dp; 243 dev->ofdev.dev.parent = &dev->bus->ofdev.dev; 244 dev->ofdev.dev.bus = &ebus_bus_type; 245 sprintf(dev->ofdev.dev.bus_id, "ebus[%08x]", dp->node); 246 247 /* Register with core */ 248 if (of_device_register(&dev->ofdev) != 0) 249 printk(KERN_DEBUG "ebus: device registration error for %s!\n", 250 dp->path_component_name); 251 252 if ((dp = dp->child) != NULL) { 253 dev->children = (struct linux_ebus_child *) 254 ebus_alloc(sizeof(struct linux_ebus_child)); 255 256 child = dev->children; 257 child->next = NULL; 258 child->parent = dev; 259 child->bus = dev->bus; 260 fill_ebus_child(dp, child); 261 262 while ((dp = dp->sibling) != NULL) { 263 child->next = (struct linux_ebus_child *) 264 ebus_alloc(sizeof(struct linux_ebus_child)); 265 266 child = child->next; 267 child->next = NULL; 268 child->parent = dev; 269 child->bus = dev->bus; 270 fill_ebus_child(dp, child); 271 } 272 } 273 } 274 275 void __init ebus_init(void) 276 { 277 const struct linux_prom_pci_registers *regs; 278 struct linux_pbm_info *pbm; 279 struct linux_ebus_device *dev; 280 struct linux_ebus *ebus; 281 struct ebus_system_entry *sp; 282 struct pci_dev *pdev; 283 struct pcidev_cookie *cookie; 284 struct device_node *dp; 285 struct resource *p; 286 unsigned short pci_command; 287 int len, reg, nreg; 288 int num_ebus = 0; 289 290 dp = of_find_node_by_path("/"); 291 for (sp = ebus_blacklist; sp->esname != NULL; sp++) { 292 if (strcmp(dp->name, sp->esname) == 0) { 293 ebus_blackp = sp->ipt; 294 break; 295 } 296 } 297 298 pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL); 299 if (!pdev) 300 return; 301 302 cookie = pdev->sysdata; 303 dp = cookie->prom_node; 304 305 ebus_chain = ebus = (struct linux_ebus *) 306 ebus_alloc(sizeof(struct linux_ebus)); 307 ebus->next = NULL; 308 309 while (dp) { 310 struct device_node *nd; 311 312 ebus->prom_node = dp; 313 ebus->self = pdev; 314 ebus->parent = pbm = cookie->pbm; 315 316 /* Enable BUS Master. */ 317 pci_read_config_word(pdev, PCI_COMMAND, &pci_command); 318 pci_command |= PCI_COMMAND_MASTER; 319 pci_write_config_word(pdev, PCI_COMMAND, pci_command); 320 321 regs = of_get_property(dp, "reg", &len); 322 if (!regs) { 323 prom_printf("%s: can't find reg property\n", 324 __FUNCTION__); 325 prom_halt(); 326 } 327 nreg = len / sizeof(struct linux_prom_pci_registers); 328 329 p = &ebus->self->resource[0]; 330 for (reg = 0; reg < nreg; reg++) { 331 if (!(regs[reg].which_io & 0x03000000)) 332 continue; 333 334 (p++)->start = regs[reg].phys_lo; 335 } 336 337 ebus->ofdev.node = dp; 338 ebus->ofdev.dev.parent = &pdev->dev; 339 ebus->ofdev.dev.bus = &ebus_bus_type; 340 sprintf(ebus->ofdev.dev.bus_id, "ebus%d", num_ebus); 341 342 /* Register with core */ 343 if (of_device_register(&ebus->ofdev) != 0) 344 printk(KERN_DEBUG "ebus: device registration error for %s!\n", 345 dp->path_component_name); 346 347 348 nd = dp->child; 349 if (!nd) 350 goto next_ebus; 351 352 ebus->devices = (struct linux_ebus_device *) 353 ebus_alloc(sizeof(struct linux_ebus_device)); 354 355 dev = ebus->devices; 356 dev->next = NULL; 357 dev->children = NULL; 358 dev->bus = ebus; 359 fill_ebus_device(nd, dev); 360 361 while ((nd = nd->sibling) != NULL) { 362 dev->next = (struct linux_ebus_device *) 363 ebus_alloc(sizeof(struct linux_ebus_device)); 364 365 dev = dev->next; 366 dev->next = NULL; 367 dev->children = NULL; 368 dev->bus = ebus; 369 fill_ebus_device(nd, dev); 370 } 371 372 next_ebus: 373 pdev = pci_get_device(PCI_VENDOR_ID_SUN, 374 PCI_DEVICE_ID_SUN_EBUS, pdev); 375 if (!pdev) 376 break; 377 378 cookie = pdev->sysdata; 379 dp = cookie->prom_node; 380 381 ebus->next = (struct linux_ebus *) 382 ebus_alloc(sizeof(struct linux_ebus)); 383 ebus = ebus->next; 384 ebus->next = NULL; 385 ++num_ebus; 386 } 387 if (pdev) 388 pci_dev_put(pdev); 389 } 390