David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 1 | #include <linux/string.h> |
| 2 | #include <linux/kernel.h> |
| 3 | #include <linux/init.h> |
| 4 | #include <linux/module.h> |
| 5 | #include <linux/mod_devicetable.h> |
| 6 | #include <linux/slab.h> |
| 7 | |
| 8 | #include <asm/errno.h> |
| 9 | #include <asm/of_device.h> |
| 10 | |
| 11 | /** |
| 12 | * of_match_device - Tell if an of_device structure has a matching |
| 13 | * of_match structure |
| 14 | * @ids: array of of device match structures to search in |
| 15 | * @dev: the of device structure to match against |
| 16 | * |
| 17 | * Used by a driver to check whether an of_device present in the |
| 18 | * system is in its list of supported devices. |
| 19 | */ |
| 20 | const struct of_device_id *of_match_device(const struct of_device_id *matches, |
| 21 | const struct of_device *dev) |
| 22 | { |
| 23 | if (!dev->node) |
| 24 | return NULL; |
| 25 | while (matches->name[0] || matches->type[0] || matches->compatible[0]) { |
| 26 | int match = 1; |
| 27 | if (matches->name[0]) |
| 28 | match &= dev->node->name |
| 29 | && !strcmp(matches->name, dev->node->name); |
| 30 | if (matches->type[0]) |
| 31 | match &= dev->node->type |
| 32 | && !strcmp(matches->type, dev->node->type); |
| 33 | if (matches->compatible[0]) |
| 34 | match &= of_device_is_compatible(dev->node, |
| 35 | matches->compatible); |
| 36 | if (match) |
| 37 | return matches; |
| 38 | matches++; |
| 39 | } |
| 40 | return NULL; |
| 41 | } |
| 42 | |
| 43 | static int of_platform_bus_match(struct device *dev, struct device_driver *drv) |
| 44 | { |
| 45 | struct of_device * of_dev = to_of_device(dev); |
| 46 | struct of_platform_driver * of_drv = to_of_platform_driver(drv); |
| 47 | const struct of_device_id * matches = of_drv->match_table; |
| 48 | |
| 49 | if (!matches) |
| 50 | return 0; |
| 51 | |
| 52 | return of_match_device(matches, of_dev) != NULL; |
| 53 | } |
| 54 | |
| 55 | struct of_device *of_dev_get(struct of_device *dev) |
| 56 | { |
| 57 | struct device *tmp; |
| 58 | |
| 59 | if (!dev) |
| 60 | return NULL; |
| 61 | tmp = get_device(&dev->dev); |
| 62 | if (tmp) |
| 63 | return to_of_device(tmp); |
| 64 | else |
| 65 | return NULL; |
| 66 | } |
| 67 | |
| 68 | void of_dev_put(struct of_device *dev) |
| 69 | { |
| 70 | if (dev) |
| 71 | put_device(&dev->dev); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | static int of_device_probe(struct device *dev) |
| 76 | { |
| 77 | int error = -ENODEV; |
| 78 | struct of_platform_driver *drv; |
| 79 | struct of_device *of_dev; |
| 80 | const struct of_device_id *match; |
| 81 | |
| 82 | drv = to_of_platform_driver(dev->driver); |
| 83 | of_dev = to_of_device(dev); |
| 84 | |
| 85 | if (!drv->probe) |
| 86 | return error; |
| 87 | |
| 88 | of_dev_get(of_dev); |
| 89 | |
| 90 | match = of_match_device(drv->match_table, of_dev); |
| 91 | if (match) |
| 92 | error = drv->probe(of_dev, match); |
| 93 | if (error) |
| 94 | of_dev_put(of_dev); |
| 95 | |
| 96 | return error; |
| 97 | } |
| 98 | |
| 99 | static int of_device_remove(struct device *dev) |
| 100 | { |
| 101 | struct of_device * of_dev = to_of_device(dev); |
| 102 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); |
| 103 | |
| 104 | if (dev->driver && drv->remove) |
| 105 | drv->remove(of_dev); |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int of_device_suspend(struct device *dev, pm_message_t state) |
| 110 | { |
| 111 | struct of_device * of_dev = to_of_device(dev); |
| 112 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); |
| 113 | int error = 0; |
| 114 | |
| 115 | if (dev->driver && drv->suspend) |
| 116 | error = drv->suspend(of_dev, state); |
| 117 | return error; |
| 118 | } |
| 119 | |
| 120 | static int of_device_resume(struct device * dev) |
| 121 | { |
| 122 | struct of_device * of_dev = to_of_device(dev); |
| 123 | struct of_platform_driver * drv = to_of_platform_driver(dev->driver); |
| 124 | int error = 0; |
| 125 | |
| 126 | if (dev->driver && drv->resume) |
| 127 | error = drv->resume(of_dev); |
| 128 | return error; |
| 129 | } |
| 130 | |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 131 | static int node_match(struct device *dev, void *data) |
| 132 | { |
| 133 | struct of_device *op = to_of_device(dev); |
| 134 | struct device_node *dp = data; |
| 135 | |
| 136 | return (op->node == dp); |
| 137 | } |
| 138 | |
| 139 | struct of_device *of_find_device_by_node(struct device_node *dp) |
| 140 | { |
| 141 | struct device *dev = bus_find_device(&of_bus_type, NULL, |
| 142 | dp, node_match); |
| 143 | |
| 144 | if (dev) |
| 145 | return to_of_device(dev); |
| 146 | |
| 147 | return NULL; |
| 148 | } |
| 149 | EXPORT_SYMBOL(of_find_device_by_node); |
| 150 | |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 151 | #ifdef CONFIG_PCI |
| 152 | struct bus_type ebus_bus_type = { |
| 153 | .name = "ebus", |
| 154 | .match = of_platform_bus_match, |
| 155 | .probe = of_device_probe, |
| 156 | .remove = of_device_remove, |
| 157 | .suspend = of_device_suspend, |
| 158 | .resume = of_device_resume, |
| 159 | }; |
David S. Miller | 6985391 | 2006-06-25 01:21:38 -0700 | [diff] [blame] | 160 | EXPORT_SYMBOL(ebus_bus_type); |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 161 | #endif |
| 162 | |
| 163 | #ifdef CONFIG_SBUS |
| 164 | struct bus_type sbus_bus_type = { |
| 165 | .name = "sbus", |
| 166 | .match = of_platform_bus_match, |
| 167 | .probe = of_device_probe, |
| 168 | .remove = of_device_remove, |
| 169 | .suspend = of_device_suspend, |
| 170 | .resume = of_device_resume, |
| 171 | }; |
David S. Miller | 6985391 | 2006-06-25 01:21:38 -0700 | [diff] [blame] | 172 | EXPORT_SYMBOL(sbus_bus_type); |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 173 | #endif |
| 174 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 175 | struct bus_type of_bus_type = { |
| 176 | .name = "of", |
| 177 | .match = of_platform_bus_match, |
| 178 | .probe = of_device_probe, |
| 179 | .remove = of_device_remove, |
| 180 | .suspend = of_device_suspend, |
| 181 | .resume = of_device_resume, |
| 182 | }; |
| 183 | EXPORT_SYMBOL(of_bus_type); |
| 184 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 185 | static inline u64 of_read_addr(const u32 *cell, int size) |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 186 | { |
| 187 | u64 r = 0; |
| 188 | while (size--) |
| 189 | r = (r << 32) | *(cell++); |
| 190 | return r; |
| 191 | } |
| 192 | |
| 193 | static void __init get_cells(struct device_node *dp, |
| 194 | int *addrc, int *sizec) |
| 195 | { |
| 196 | if (addrc) |
| 197 | *addrc = of_n_addr_cells(dp); |
| 198 | if (sizec) |
| 199 | *sizec = of_n_size_cells(dp); |
| 200 | } |
| 201 | |
| 202 | /* Max address size we deal with */ |
| 203 | #define OF_MAX_ADDR_CELLS 4 |
| 204 | |
| 205 | struct of_bus { |
| 206 | const char *name; |
| 207 | const char *addr_prop_name; |
| 208 | int (*match)(struct device_node *parent); |
| 209 | void (*count_cells)(struct device_node *child, |
| 210 | int *addrc, int *sizec); |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 211 | int (*map)(u32 *addr, const u32 *range, |
| 212 | int na, int ns, int pna); |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 213 | unsigned int (*get_flags)(u32 *addr); |
| 214 | }; |
| 215 | |
| 216 | /* |
| 217 | * Default translator (generic bus) |
| 218 | */ |
| 219 | |
| 220 | static void of_bus_default_count_cells(struct device_node *dev, |
| 221 | int *addrc, int *sizec) |
| 222 | { |
| 223 | get_cells(dev, addrc, sizec); |
| 224 | } |
| 225 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 226 | /* Make sure the least significant 64-bits are in-range. Even |
| 227 | * for 3 or 4 cell values it is a good enough approximation. |
| 228 | */ |
| 229 | static int of_out_of_range(const u32 *addr, const u32 *base, |
| 230 | const u32 *size, int na, int ns) |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 231 | { |
| 232 | u64 a = of_read_addr(addr, na); |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 233 | u64 b = of_read_addr(base, na); |
| 234 | |
| 235 | if (a < b) |
| 236 | return 1; |
| 237 | |
| 238 | b += of_read_addr(size, ns); |
| 239 | if (a >= b) |
| 240 | return 1; |
| 241 | |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | static int of_bus_default_map(u32 *addr, const u32 *range, |
| 246 | int na, int ns, int pna) |
| 247 | { |
| 248 | u32 result[OF_MAX_ADDR_CELLS]; |
| 249 | int i; |
| 250 | |
| 251 | if (ns > 2) { |
| 252 | printk("of_device: Cannot handle size cells (%d) > 2.", ns); |
| 253 | return -EINVAL; |
| 254 | } |
| 255 | |
| 256 | if (of_out_of_range(addr, range, range + na + pna, na, ns)) |
| 257 | return -EINVAL; |
| 258 | |
| 259 | /* Start with the parent range base. */ |
| 260 | memcpy(result, range + na, pna * 4); |
| 261 | |
| 262 | /* Add in the child address offset. */ |
| 263 | for (i = 0; i < na; i++) |
| 264 | result[pna - 1 - i] += |
| 265 | (addr[na - 1 - i] - |
| 266 | range[na - 1 - i]); |
| 267 | |
| 268 | memcpy(addr, result, pna * 4); |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static unsigned int of_bus_default_get_flags(u32 *addr) |
| 274 | { |
| 275 | return IORESOURCE_MEM; |
| 276 | } |
| 277 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 278 | /* |
| 279 | * PCI bus specific translator |
| 280 | */ |
| 281 | |
| 282 | static int of_bus_pci_match(struct device_node *np) |
| 283 | { |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 284 | if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) { |
| 285 | /* Do not do PCI specific frobbing if the |
| 286 | * PCI bridge lacks a ranges property. We |
| 287 | * want to pass it through up to the next |
| 288 | * parent as-is, not with the PCI translate |
| 289 | * method which chops off the top address cell. |
| 290 | */ |
| 291 | if (!of_find_property(np, "ranges", NULL)) |
| 292 | return 0; |
| 293 | |
| 294 | return 1; |
| 295 | } |
| 296 | |
| 297 | return 0; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static void of_bus_pci_count_cells(struct device_node *np, |
| 301 | int *addrc, int *sizec) |
| 302 | { |
| 303 | if (addrc) |
| 304 | *addrc = 3; |
| 305 | if (sizec) |
| 306 | *sizec = 2; |
| 307 | } |
| 308 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 309 | static int of_bus_pci_map(u32 *addr, const u32 *range, |
| 310 | int na, int ns, int pna) |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 311 | { |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 312 | u32 result[OF_MAX_ADDR_CELLS]; |
| 313 | int i; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 314 | |
| 315 | /* Check address type match */ |
| 316 | if ((addr[0] ^ range[0]) & 0x03000000) |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 317 | return -EINVAL; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 318 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 319 | if (of_out_of_range(addr + 1, range + 1, range + na + pna, |
| 320 | na - 1, ns)) |
| 321 | return -EINVAL; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 322 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 323 | /* Start with the parent range base. */ |
| 324 | memcpy(result, range + na, pna * 4); |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 325 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 326 | /* Add in the child address offset, skipping high cell. */ |
| 327 | for (i = 0; i < na - 1; i++) |
| 328 | result[pna - 1 - i] += |
| 329 | (addr[na - 1 - i] - |
| 330 | range[na - 1 - i]); |
| 331 | |
| 332 | memcpy(addr, result, pna * 4); |
| 333 | |
| 334 | return 0; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | static unsigned int of_bus_pci_get_flags(u32 *addr) |
| 338 | { |
| 339 | unsigned int flags = 0; |
| 340 | u32 w = addr[0]; |
| 341 | |
| 342 | switch((w >> 24) & 0x03) { |
| 343 | case 0x01: |
| 344 | flags |= IORESOURCE_IO; |
| 345 | case 0x02: /* 32 bits */ |
| 346 | case 0x03: /* 64 bits */ |
| 347 | flags |= IORESOURCE_MEM; |
| 348 | } |
| 349 | if (w & 0x40000000) |
| 350 | flags |= IORESOURCE_PREFETCH; |
| 351 | return flags; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * SBUS bus specific translator |
| 356 | */ |
| 357 | |
| 358 | static int of_bus_sbus_match(struct device_node *np) |
| 359 | { |
| 360 | return !strcmp(np->name, "sbus") || |
| 361 | !strcmp(np->name, "sbi"); |
| 362 | } |
| 363 | |
| 364 | static void of_bus_sbus_count_cells(struct device_node *child, |
| 365 | int *addrc, int *sizec) |
| 366 | { |
| 367 | if (addrc) |
| 368 | *addrc = 2; |
| 369 | if (sizec) |
| 370 | *sizec = 1; |
| 371 | } |
| 372 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 373 | static int of_bus_sbus_map(u32 *addr, const u32 *range, int na, int ns, int pna) |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 374 | { |
| 375 | return of_bus_default_map(addr, range, na, ns, pna); |
| 376 | } |
| 377 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 378 | static unsigned int of_bus_sbus_get_flags(u32 *addr) |
| 379 | { |
| 380 | return IORESOURCE_MEM; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | /* |
| 385 | * Array of bus specific translators |
| 386 | */ |
| 387 | |
| 388 | static struct of_bus of_busses[] = { |
| 389 | /* PCI */ |
| 390 | { |
| 391 | .name = "pci", |
| 392 | .addr_prop_name = "assigned-addresses", |
| 393 | .match = of_bus_pci_match, |
| 394 | .count_cells = of_bus_pci_count_cells, |
| 395 | .map = of_bus_pci_map, |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 396 | .get_flags = of_bus_pci_get_flags, |
| 397 | }, |
| 398 | /* SBUS */ |
| 399 | { |
| 400 | .name = "sbus", |
| 401 | .addr_prop_name = "reg", |
| 402 | .match = of_bus_sbus_match, |
| 403 | .count_cells = of_bus_sbus_count_cells, |
| 404 | .map = of_bus_sbus_map, |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 405 | .get_flags = of_bus_sbus_get_flags, |
| 406 | }, |
| 407 | /* Default */ |
| 408 | { |
| 409 | .name = "default", |
| 410 | .addr_prop_name = "reg", |
| 411 | .match = NULL, |
| 412 | .count_cells = of_bus_default_count_cells, |
| 413 | .map = of_bus_default_map, |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 414 | .get_flags = of_bus_default_get_flags, |
| 415 | }, |
| 416 | }; |
| 417 | |
| 418 | static struct of_bus *of_match_bus(struct device_node *np) |
| 419 | { |
| 420 | int i; |
| 421 | |
| 422 | for (i = 0; i < ARRAY_SIZE(of_busses); i ++) |
| 423 | if (!of_busses[i].match || of_busses[i].match(np)) |
| 424 | return &of_busses[i]; |
| 425 | BUG(); |
| 426 | return NULL; |
| 427 | } |
| 428 | |
| 429 | static int __init build_one_resource(struct device_node *parent, |
| 430 | struct of_bus *bus, |
| 431 | struct of_bus *pbus, |
| 432 | u32 *addr, |
| 433 | int na, int ns, int pna) |
| 434 | { |
| 435 | u32 *ranges; |
| 436 | unsigned int rlen; |
| 437 | int rone; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 438 | |
| 439 | ranges = of_get_property(parent, "ranges", &rlen); |
| 440 | if (ranges == NULL || rlen == 0) { |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 441 | u32 result[OF_MAX_ADDR_CELLS]; |
| 442 | int i; |
| 443 | |
| 444 | memset(result, 0, pna * 4); |
| 445 | for (i = 0; i < na; i++) |
| 446 | result[pna - 1 - i] = |
| 447 | addr[na - 1 - i]; |
| 448 | |
| 449 | memcpy(addr, result, pna * 4); |
| 450 | return 0; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | /* Now walk through the ranges */ |
| 454 | rlen /= 4; |
| 455 | rone = na + pna + ns; |
| 456 | for (; rlen >= rone; rlen -= rone, ranges += rone) { |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 457 | if (!bus->map(addr, ranges, na, ns, pna)) |
| 458 | return 0; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 459 | } |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 460 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 461 | return 1; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 462 | } |
| 463 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 464 | static int of_resource_verbose; |
| 465 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 466 | static void __init build_device_resources(struct of_device *op, |
| 467 | struct device *parent) |
| 468 | { |
| 469 | struct of_device *p_op; |
| 470 | struct of_bus *bus; |
| 471 | int na, ns; |
| 472 | int index, num_reg; |
| 473 | void *preg; |
| 474 | |
| 475 | if (!parent) |
| 476 | return; |
| 477 | |
| 478 | p_op = to_of_device(parent); |
| 479 | bus = of_match_bus(p_op->node); |
| 480 | bus->count_cells(op->node, &na, &ns); |
| 481 | |
| 482 | preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); |
| 483 | if (!preg || num_reg == 0) |
| 484 | return; |
| 485 | |
| 486 | /* Convert to num-cells. */ |
| 487 | num_reg /= 4; |
| 488 | |
| 489 | /* Conver to num-entries. */ |
| 490 | num_reg /= na + ns; |
| 491 | |
| 492 | for (index = 0; index < num_reg; index++) { |
| 493 | struct resource *r = &op->resource[index]; |
| 494 | u32 addr[OF_MAX_ADDR_CELLS]; |
| 495 | u32 *reg = (preg + (index * ((na + ns) * 4))); |
| 496 | struct device_node *dp = op->node; |
| 497 | struct device_node *pp = p_op->node; |
| 498 | struct of_bus *pbus; |
| 499 | u64 size, result = OF_BAD_ADDR; |
| 500 | unsigned long flags; |
| 501 | int dna, dns; |
| 502 | int pna, pns; |
| 503 | |
| 504 | size = of_read_addr(reg + na, ns); |
| 505 | flags = bus->get_flags(reg); |
| 506 | |
| 507 | memcpy(addr, reg, na * 4); |
| 508 | |
| 509 | /* If the immediate parent has no ranges property to apply, |
| 510 | * just use a 1<->1 mapping. |
| 511 | */ |
| 512 | if (of_find_property(pp, "ranges", NULL) == NULL) { |
| 513 | result = of_read_addr(addr, na); |
| 514 | goto build_res; |
| 515 | } |
| 516 | |
| 517 | dna = na; |
| 518 | dns = ns; |
| 519 | |
| 520 | while (1) { |
| 521 | dp = pp; |
| 522 | pp = dp->parent; |
| 523 | if (!pp) { |
| 524 | result = of_read_addr(addr, dna); |
| 525 | break; |
| 526 | } |
| 527 | |
| 528 | pbus = of_match_bus(pp); |
| 529 | pbus->count_cells(dp, &pna, &pns); |
| 530 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 531 | if (build_one_resource(dp, bus, pbus, addr, |
| 532 | dna, dns, pna)) |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 533 | break; |
| 534 | |
| 535 | dna = pna; |
| 536 | dns = pns; |
| 537 | bus = pbus; |
| 538 | } |
| 539 | |
| 540 | build_res: |
| 541 | memset(r, 0, sizeof(*r)); |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 542 | |
| 543 | if (of_resource_verbose) |
| 544 | printk("%s reg[%d] -> %llx\n", |
| 545 | op->node->full_name, index, |
| 546 | result); |
| 547 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 548 | if (result != OF_BAD_ADDR) { |
David S. Miller | 95714e1 | 2006-06-29 14:35:14 -0700 | [diff] [blame] | 549 | r->start = result & 0xffffffff; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 550 | r->end = result + size - 1; |
David S. Miller | 95714e1 | 2006-06-29 14:35:14 -0700 | [diff] [blame] | 551 | r->flags = flags | ((result >> 32ULL) & 0xffUL); |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 552 | } else { |
| 553 | r->start = ~0UL; |
| 554 | r->end = ~0UL; |
| 555 | } |
| 556 | r->name = op->node->name; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static struct of_device * __init scan_one_device(struct device_node *dp, |
| 561 | struct device *parent) |
| 562 | { |
| 563 | struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 564 | struct linux_prom_irqs *intr; |
| 565 | int len, i; |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 566 | |
| 567 | if (!op) |
| 568 | return NULL; |
| 569 | |
| 570 | op->node = dp; |
| 571 | |
| 572 | op->clock_freq = of_getintprop_default(dp, "clock-frequency", |
| 573 | (25*1000*1000)); |
| 574 | op->portid = of_getintprop_default(dp, "upa-portid", -1); |
| 575 | if (op->portid == -1) |
| 576 | op->portid = of_getintprop_default(dp, "portid", -1); |
| 577 | |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 578 | intr = of_get_property(dp, "intr", &len); |
| 579 | if (intr) { |
| 580 | op->num_irqs = len / sizeof(struct linux_prom_irqs); |
| 581 | for (i = 0; i < op->num_irqs; i++) |
| 582 | op->irqs[i] = intr[i].pri; |
| 583 | } else { |
| 584 | unsigned int *irq = of_get_property(dp, "interrupts", &len); |
| 585 | |
| 586 | if (irq) { |
| 587 | op->num_irqs = len / sizeof(unsigned int); |
| 588 | for (i = 0; i < op->num_irqs; i++) |
| 589 | op->irqs[i] = irq[i]; |
| 590 | } else { |
| 591 | op->num_irqs = 0; |
| 592 | } |
| 593 | } |
| 594 | if (sparc_cpu_model == sun4d) { |
| 595 | static int pil_to_sbus[] = { |
| 596 | 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0, |
| 597 | }; |
David S. Miller | 9d7ab1f | 2006-07-17 21:39:09 -0700 | [diff] [blame] | 598 | struct device_node *io_unit, *sbi = dp->parent; |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 599 | struct linux_prom_registers *regs; |
David S. Miller | 9d7ab1f | 2006-07-17 21:39:09 -0700 | [diff] [blame] | 600 | int board, slot; |
| 601 | |
| 602 | while (sbi) { |
| 603 | if (!strcmp(sbi->name, "sbi")) |
| 604 | break; |
| 605 | |
| 606 | sbi = sbi->parent; |
| 607 | } |
| 608 | if (!sbi) |
| 609 | goto build_resources; |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 610 | |
| 611 | regs = of_get_property(dp, "reg", NULL); |
David S. Miller | 9d7ab1f | 2006-07-17 21:39:09 -0700 | [diff] [blame] | 612 | if (!regs) |
| 613 | goto build_resources; |
| 614 | |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 615 | slot = regs->which_io; |
| 616 | |
David S. Miller | 9d7ab1f | 2006-07-17 21:39:09 -0700 | [diff] [blame] | 617 | /* If SBI's parent is not io-unit or the io-unit lacks |
| 618 | * a "board#" property, something is very wrong. |
| 619 | */ |
| 620 | if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) { |
| 621 | printk("%s: Error, parent is not io-unit.\n", |
| 622 | sbi->full_name); |
| 623 | goto build_resources; |
| 624 | } |
| 625 | io_unit = sbi->parent; |
| 626 | board = of_getintprop_default(io_unit, "board#", -1); |
| 627 | if (board == -1) { |
| 628 | printk("%s: Error, lacks board# property.\n", |
| 629 | io_unit->full_name); |
| 630 | goto build_resources; |
| 631 | } |
| 632 | |
David S. Miller | 8f96cd1 | 2006-06-29 15:08:02 -0700 | [diff] [blame] | 633 | for (i = 0; i < op->num_irqs; i++) { |
| 634 | int this_irq = op->irqs[i]; |
| 635 | int sbusl = pil_to_sbus[this_irq]; |
| 636 | |
| 637 | if (sbusl) |
| 638 | this_irq = (((board + 1) << 5) + |
| 639 | (sbusl << 2) + |
| 640 | slot); |
| 641 | |
| 642 | op->irqs[i] = this_irq; |
| 643 | } |
| 644 | } |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 645 | |
David S. Miller | 9d7ab1f | 2006-07-17 21:39:09 -0700 | [diff] [blame] | 646 | build_resources: |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 647 | build_device_resources(op, parent); |
| 648 | |
| 649 | op->dev.parent = parent; |
| 650 | op->dev.bus = &of_bus_type; |
| 651 | if (!parent) |
| 652 | strcpy(op->dev.bus_id, "root"); |
| 653 | else |
| 654 | strcpy(op->dev.bus_id, dp->path_component_name); |
| 655 | |
| 656 | if (of_device_register(op)) { |
| 657 | printk("%s: Could not register of device.\n", |
| 658 | dp->full_name); |
| 659 | kfree(op); |
| 660 | op = NULL; |
| 661 | } |
| 662 | |
| 663 | return op; |
| 664 | } |
| 665 | |
| 666 | static void __init scan_tree(struct device_node *dp, struct device *parent) |
| 667 | { |
| 668 | while (dp) { |
| 669 | struct of_device *op = scan_one_device(dp, parent); |
| 670 | |
| 671 | if (op) |
| 672 | scan_tree(dp->child, &op->dev); |
| 673 | |
| 674 | dp = dp->sibling; |
| 675 | } |
| 676 | } |
| 677 | |
| 678 | static void __init scan_of_devices(void) |
| 679 | { |
| 680 | struct device_node *root = of_find_node_by_path("/"); |
| 681 | struct of_device *parent; |
| 682 | |
| 683 | parent = scan_one_device(root, NULL); |
| 684 | if (!parent) |
| 685 | return; |
| 686 | |
| 687 | scan_tree(root->child, &parent->dev); |
| 688 | } |
| 689 | |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 690 | static int __init of_bus_driver_init(void) |
| 691 | { |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 692 | int err; |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 693 | |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 694 | err = bus_register(&of_bus_type); |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 695 | #ifdef CONFIG_PCI |
| 696 | if (!err) |
| 697 | err = bus_register(&ebus_bus_type); |
| 698 | #endif |
| 699 | #ifdef CONFIG_SBUS |
| 700 | if (!err) |
| 701 | err = bus_register(&sbus_bus_type); |
| 702 | #endif |
David S. Miller | cf44bbc | 2006-06-29 14:34:50 -0700 | [diff] [blame] | 703 | |
| 704 | if (!err) |
| 705 | scan_of_devices(); |
| 706 | |
| 707 | return err; |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 708 | } |
| 709 | |
| 710 | postcore_initcall(of_bus_driver_init); |
| 711 | |
David S. Miller | a83f982 | 2006-07-12 23:19:31 -0700 | [diff] [blame] | 712 | static int __init of_debug(char *str) |
| 713 | { |
| 714 | int val = 0; |
| 715 | |
| 716 | get_option(&str, &val); |
| 717 | if (val & 1) |
| 718 | of_resource_verbose = 1; |
| 719 | return 1; |
| 720 | } |
| 721 | |
| 722 | __setup("of_debug=", of_debug); |
| 723 | |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 724 | int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) |
| 725 | { |
| 726 | /* initialize common driver fields */ |
| 727 | drv->driver.name = drv->name; |
| 728 | drv->driver.bus = bus; |
| 729 | |
| 730 | /* register with core */ |
| 731 | return driver_register(&drv->driver); |
| 732 | } |
| 733 | |
| 734 | void of_unregister_driver(struct of_platform_driver *drv) |
| 735 | { |
| 736 | driver_unregister(&drv->driver); |
| 737 | } |
| 738 | |
| 739 | |
| 740 | static ssize_t dev_show_devspec(struct device *dev, struct device_attribute *attr, char *buf) |
| 741 | { |
| 742 | struct of_device *ofdev; |
| 743 | |
| 744 | ofdev = to_of_device(dev); |
| 745 | return sprintf(buf, "%s", ofdev->node->full_name); |
| 746 | } |
| 747 | |
| 748 | static DEVICE_ATTR(devspec, S_IRUGO, dev_show_devspec, NULL); |
| 749 | |
| 750 | /** |
| 751 | * of_release_dev - free an of device structure when all users of it are finished. |
| 752 | * @dev: device that's been disconnected |
| 753 | * |
| 754 | * Will be called only by the device core when all users of this of device are |
| 755 | * done. |
| 756 | */ |
| 757 | void of_release_dev(struct device *dev) |
| 758 | { |
| 759 | struct of_device *ofdev; |
| 760 | |
| 761 | ofdev = to_of_device(dev); |
| 762 | |
| 763 | kfree(ofdev); |
| 764 | } |
| 765 | |
| 766 | int of_device_register(struct of_device *ofdev) |
| 767 | { |
| 768 | int rc; |
| 769 | |
| 770 | BUG_ON(ofdev->node == NULL); |
| 771 | |
| 772 | rc = device_register(&ofdev->dev); |
| 773 | if (rc) |
| 774 | return rc; |
| 775 | |
Andrew Morton | 6cc8b6f | 2006-07-10 15:28:54 -0700 | [diff] [blame] | 776 | rc = device_create_file(&ofdev->dev, &dev_attr_devspec); |
| 777 | if (rc) |
| 778 | device_unregister(&ofdev->dev); |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 779 | |
Andrew Morton | 6cc8b6f | 2006-07-10 15:28:54 -0700 | [diff] [blame] | 780 | return rc; |
David S. Miller | fd53143 | 2006-06-23 15:55:17 -0700 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | void of_device_unregister(struct of_device *ofdev) |
| 784 | { |
| 785 | device_remove_file(&ofdev->dev, &dev_attr_devspec); |
| 786 | device_unregister(&ofdev->dev); |
| 787 | } |
| 788 | |
| 789 | struct of_device* of_platform_device_create(struct device_node *np, |
| 790 | const char *bus_id, |
| 791 | struct device *parent, |
| 792 | struct bus_type *bus) |
| 793 | { |
| 794 | struct of_device *dev; |
| 795 | |
| 796 | dev = kmalloc(sizeof(*dev), GFP_KERNEL); |
| 797 | if (!dev) |
| 798 | return NULL; |
| 799 | memset(dev, 0, sizeof(*dev)); |
| 800 | |
| 801 | dev->dev.parent = parent; |
| 802 | dev->dev.bus = bus; |
| 803 | dev->dev.release = of_release_dev; |
| 804 | |
| 805 | strlcpy(dev->dev.bus_id, bus_id, BUS_ID_SIZE); |
| 806 | |
| 807 | if (of_device_register(dev) != 0) { |
| 808 | kfree(dev); |
| 809 | return NULL; |
| 810 | } |
| 811 | |
| 812 | return dev; |
| 813 | } |
| 814 | |
| 815 | EXPORT_SYMBOL(of_match_device); |
| 816 | EXPORT_SYMBOL(of_register_driver); |
| 817 | EXPORT_SYMBOL(of_unregister_driver); |
| 818 | EXPORT_SYMBOL(of_device_register); |
| 819 | EXPORT_SYMBOL(of_device_unregister); |
| 820 | EXPORT_SYMBOL(of_dev_get); |
| 821 | EXPORT_SYMBOL(of_dev_put); |
| 822 | EXPORT_SYMBOL(of_platform_device_create); |
| 823 | EXPORT_SYMBOL(of_release_dev); |