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