1 /* 2 * Linux Plug and Play Support 3 * Copyright by Adam Belay <ambx1@neo.rr.com> 4 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. 5 * Bjorn Helgaas <bjorn.helgaas@hp.com> 6 */ 7 8 #ifndef _LINUX_PNP_H 9 #define _LINUX_PNP_H 10 11 #include <linux/device.h> 12 #include <linux/list.h> 13 #include <linux/errno.h> 14 #include <linux/mod_devicetable.h> 15 #include <linux/console.h> 16 17 #define PNP_NAME_LEN 50 18 19 struct pnp_protocol; 20 struct pnp_dev; 21 22 /* 23 * Resource Management 24 */ 25 #ifdef CONFIG_PNP 26 struct resource *pnp_get_resource(struct pnp_dev *dev, unsigned long type, 27 unsigned int num); 28 #else 29 static inline struct resource *pnp_get_resource(struct pnp_dev *dev, 30 unsigned long type, unsigned int num) 31 { 32 return NULL; 33 } 34 #endif 35 36 static inline int pnp_resource_valid(struct resource *res) 37 { 38 if (res) 39 return 1; 40 return 0; 41 } 42 43 static inline int pnp_resource_enabled(struct resource *res) 44 { 45 if (res && !(res->flags & IORESOURCE_DISABLED)) 46 return 1; 47 return 0; 48 } 49 50 static inline resource_size_t pnp_resource_len(struct resource *res) 51 { 52 if (res->start == 0 && res->end == 0) 53 return 0; 54 return resource_size(res); 55 } 56 57 58 static inline resource_size_t pnp_port_start(struct pnp_dev *dev, 59 unsigned int bar) 60 { 61 struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); 62 63 if (pnp_resource_valid(res)) 64 return res->start; 65 return 0; 66 } 67 68 static inline resource_size_t pnp_port_end(struct pnp_dev *dev, 69 unsigned int bar) 70 { 71 struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); 72 73 if (pnp_resource_valid(res)) 74 return res->end; 75 return 0; 76 } 77 78 static inline unsigned long pnp_port_flags(struct pnp_dev *dev, 79 unsigned int bar) 80 { 81 struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); 82 83 if (pnp_resource_valid(res)) 84 return res->flags; 85 return IORESOURCE_IO | IORESOURCE_AUTO; 86 } 87 88 static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar) 89 { 90 return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IO, bar)); 91 } 92 93 static inline resource_size_t pnp_port_len(struct pnp_dev *dev, 94 unsigned int bar) 95 { 96 struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); 97 98 if (pnp_resource_valid(res)) 99 return pnp_resource_len(res); 100 return 0; 101 } 102 103 104 static inline resource_size_t pnp_mem_start(struct pnp_dev *dev, 105 unsigned int bar) 106 { 107 struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); 108 109 if (pnp_resource_valid(res)) 110 return res->start; 111 return 0; 112 } 113 114 static inline resource_size_t pnp_mem_end(struct pnp_dev *dev, 115 unsigned int bar) 116 { 117 struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); 118 119 if (pnp_resource_valid(res)) 120 return res->end; 121 return 0; 122 } 123 124 static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar) 125 { 126 struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); 127 128 if (pnp_resource_valid(res)) 129 return res->flags; 130 return IORESOURCE_MEM | IORESOURCE_AUTO; 131 } 132 133 static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar) 134 { 135 return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_MEM, bar)); 136 } 137 138 static inline resource_size_t pnp_mem_len(struct pnp_dev *dev, 139 unsigned int bar) 140 { 141 struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); 142 143 if (pnp_resource_valid(res)) 144 return pnp_resource_len(res); 145 return 0; 146 } 147 148 149 static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar) 150 { 151 struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar); 152 153 if (pnp_resource_valid(res)) 154 return res->start; 155 return -1; 156 } 157 158 static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar) 159 { 160 struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar); 161 162 if (pnp_resource_valid(res)) 163 return res->flags; 164 return IORESOURCE_IRQ | IORESOURCE_AUTO; 165 } 166 167 static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar) 168 { 169 return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IRQ, bar)); 170 } 171 172 173 static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar) 174 { 175 struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar); 176 177 if (pnp_resource_valid(res)) 178 return res->start; 179 return -1; 180 } 181 182 static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar) 183 { 184 struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar); 185 186 if (pnp_resource_valid(res)) 187 return res->flags; 188 return IORESOURCE_DMA | IORESOURCE_AUTO; 189 } 190 191 static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar) 192 { 193 return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_DMA, bar)); 194 } 195 196 197 /* 198 * Device Management 199 */ 200 201 struct pnp_card { 202 struct device dev; /* Driver Model device interface */ 203 unsigned char number; /* used as an index, must be unique */ 204 struct list_head global_list; /* node in global list of cards */ 205 struct list_head protocol_list; /* node in protocol's list of cards */ 206 struct list_head devices; /* devices attached to the card */ 207 208 struct pnp_protocol *protocol; 209 struct pnp_id *id; /* contains supported EISA IDs */ 210 211 char name[PNP_NAME_LEN]; /* contains a human-readable name */ 212 unsigned char pnpver; /* Plug & Play version */ 213 unsigned char productver; /* product version */ 214 unsigned int serial; /* serial number */ 215 unsigned char checksum; /* if zero - checksum passed */ 216 struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */ 217 }; 218 219 #define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list) 220 #define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list) 221 #define to_pnp_card(n) container_of(n, struct pnp_card, dev) 222 #define pnp_for_each_card(card) \ 223 for((card) = global_to_pnp_card(pnp_cards.next); \ 224 (card) != global_to_pnp_card(&pnp_cards); \ 225 (card) = global_to_pnp_card((card)->global_list.next)) 226 227 struct pnp_card_link { 228 struct pnp_card *card; 229 struct pnp_card_driver *driver; 230 void *driver_data; 231 pm_message_t pm_state; 232 }; 233 234 static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard) 235 { 236 return pcard->driver_data; 237 } 238 239 static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data) 240 { 241 pcard->driver_data = data; 242 } 243 244 struct pnp_dev { 245 struct device dev; /* Driver Model device interface */ 246 u64 dma_mask; 247 unsigned int number; /* used as an index, must be unique */ 248 int status; 249 250 struct list_head global_list; /* node in global list of devices */ 251 struct list_head protocol_list; /* node in list of device's protocol */ 252 struct list_head card_list; /* node in card's list of devices */ 253 struct list_head rdev_list; /* node in cards list of requested devices */ 254 255 struct pnp_protocol *protocol; 256 struct pnp_card *card; /* card the device is attached to, none if NULL */ 257 struct pnp_driver *driver; 258 struct pnp_card_link *card_link; 259 260 struct pnp_id *id; /* supported EISA IDs */ 261 262 int active; 263 int capabilities; 264 unsigned int num_dependent_sets; 265 struct list_head resources; 266 struct list_head options; 267 268 char name[PNP_NAME_LEN]; /* contains a human-readable name */ 269 int flags; /* used by protocols */ 270 struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */ 271 void *data; 272 }; 273 274 #define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list) 275 #define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list) 276 #define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list) 277 #define to_pnp_dev(n) container_of(n, struct pnp_dev, dev) 278 #define pnp_for_each_dev(dev) \ 279 for((dev) = global_to_pnp_dev(pnp_global.next); \ 280 (dev) != global_to_pnp_dev(&pnp_global); \ 281 (dev) = global_to_pnp_dev((dev)->global_list.next)) 282 #define card_for_each_dev(card,dev) \ 283 for((dev) = card_to_pnp_dev((card)->devices.next); \ 284 (dev) != card_to_pnp_dev(&(card)->devices); \ 285 (dev) = card_to_pnp_dev((dev)->card_list.next)) 286 #define pnp_dev_name(dev) (dev)->name 287 288 static inline void *pnp_get_drvdata(struct pnp_dev *pdev) 289 { 290 return dev_get_drvdata(&pdev->dev); 291 } 292 293 static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data) 294 { 295 dev_set_drvdata(&pdev->dev, data); 296 } 297 298 struct pnp_fixup { 299 char id[7]; 300 void (*quirk_function) (struct pnp_dev * dev); /* fixup function */ 301 }; 302 303 /* config parameters */ 304 #define PNP_CONFIG_NORMAL 0x0001 305 #define PNP_CONFIG_FORCE 0x0002 /* disables validity checking */ 306 307 /* capabilities */ 308 #define PNP_READ 0x0001 309 #define PNP_WRITE 0x0002 310 #define PNP_DISABLE 0x0004 311 #define PNP_CONFIGURABLE 0x0008 312 #define PNP_REMOVABLE 0x0010 313 #define PNP_CONSOLE 0x0020 314 315 #define pnp_can_read(dev) (((dev)->protocol->get) && \ 316 ((dev)->capabilities & PNP_READ)) 317 #define pnp_can_write(dev) (((dev)->protocol->set) && \ 318 ((dev)->capabilities & PNP_WRITE)) 319 #define pnp_can_disable(dev) (((dev)->protocol->disable) && \ 320 ((dev)->capabilities & PNP_DISABLE) && \ 321 (!((dev)->capabilities & PNP_CONSOLE) || \ 322 console_suspend_enabled)) 323 #define pnp_can_configure(dev) ((!(dev)->active) && \ 324 ((dev)->capabilities & PNP_CONFIGURABLE)) 325 #define pnp_can_suspend(dev) (((dev)->protocol->suspend) && \ 326 (!((dev)->capabilities & PNP_CONSOLE) || \ 327 console_suspend_enabled)) 328 329 330 #ifdef CONFIG_ISAPNP 331 extern struct pnp_protocol isapnp_protocol; 332 #define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol)) 333 #else 334 #define pnp_device_is_isapnp(dev) 0 335 #endif 336 extern struct mutex pnp_res_mutex; 337 338 #ifdef CONFIG_PNPBIOS 339 extern struct pnp_protocol pnpbios_protocol; 340 #define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol)) 341 #else 342 #define pnp_device_is_pnpbios(dev) 0 343 #endif 344 345 #ifdef CONFIG_PNPACPI 346 extern struct pnp_protocol pnpacpi_protocol; 347 348 static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev) 349 { 350 if (dev->protocol == &pnpacpi_protocol) 351 return dev->data; 352 return NULL; 353 } 354 #else 355 #define pnp_acpi_device(dev) 0 356 #endif 357 358 /* status */ 359 #define PNP_READY 0x0000 360 #define PNP_ATTACHED 0x0001 361 #define PNP_BUSY 0x0002 362 #define PNP_FAULTY 0x0004 363 364 /* isapnp specific macros */ 365 366 #define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1) 367 #define isapnp_csn_number(dev) ((dev)->number) 368 369 /* 370 * Driver Management 371 */ 372 373 struct pnp_id { 374 char id[PNP_ID_LEN]; 375 struct pnp_id *next; 376 }; 377 378 struct pnp_driver { 379 char *name; 380 const struct pnp_device_id *id_table; 381 unsigned int flags; 382 int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id); 383 void (*remove) (struct pnp_dev *dev); 384 void (*shutdown) (struct pnp_dev *dev); 385 int (*suspend) (struct pnp_dev *dev, pm_message_t state); 386 int (*resume) (struct pnp_dev *dev); 387 struct device_driver driver; 388 }; 389 390 #define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver) 391 392 struct pnp_card_driver { 393 struct list_head global_list; 394 char *name; 395 const struct pnp_card_device_id *id_table; 396 unsigned int flags; 397 int (*probe) (struct pnp_card_link *card, 398 const struct pnp_card_device_id *card_id); 399 void (*remove) (struct pnp_card_link *card); 400 int (*suspend) (struct pnp_card_link *card, pm_message_t state); 401 int (*resume) (struct pnp_card_link *card); 402 struct pnp_driver link; 403 }; 404 405 #define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link) 406 407 /* pnp driver flags */ 408 #define PNP_DRIVER_RES_DO_NOT_CHANGE 0x0001 /* do not change the state of the device */ 409 #define PNP_DRIVER_RES_DISABLE 0x0003 /* ensure the device is disabled */ 410 411 /* 412 * Protocol Management 413 */ 414 415 struct pnp_protocol { 416 struct list_head protocol_list; 417 char *name; 418 419 /* resource control functions */ 420 int (*get) (struct pnp_dev *dev); 421 int (*set) (struct pnp_dev *dev); 422 int (*disable) (struct pnp_dev *dev); 423 424 /* protocol specific suspend/resume */ 425 bool (*can_wakeup) (struct pnp_dev *dev); 426 int (*suspend) (struct pnp_dev * dev, pm_message_t state); 427 int (*resume) (struct pnp_dev * dev); 428 429 /* used by pnp layer only (look but don't touch) */ 430 unsigned char number; /* protocol number */ 431 struct device dev; /* link to driver model */ 432 struct list_head cards; 433 struct list_head devices; 434 }; 435 436 #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list) 437 #define protocol_for_each_card(protocol,card) \ 438 for((card) = protocol_to_pnp_card((protocol)->cards.next); \ 439 (card) != protocol_to_pnp_card(&(protocol)->cards); \ 440 (card) = protocol_to_pnp_card((card)->protocol_list.next)) 441 #define protocol_for_each_dev(protocol,dev) \ 442 for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \ 443 (dev) != protocol_to_pnp_dev(&(protocol)->devices); \ 444 (dev) = protocol_to_pnp_dev((dev)->protocol_list.next)) 445 446 extern struct bus_type pnp_bus_type; 447 448 #if defined(CONFIG_PNP) 449 450 /* device management */ 451 int pnp_device_attach(struct pnp_dev *pnp_dev); 452 void pnp_device_detach(struct pnp_dev *pnp_dev); 453 extern struct list_head pnp_global; 454 extern int pnp_platform_devices; 455 456 /* multidevice card support */ 457 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, 458 const char *id, struct pnp_dev *from); 459 void pnp_release_card_device(struct pnp_dev *dev); 460 int pnp_register_card_driver(struct pnp_card_driver *drv); 461 void pnp_unregister_card_driver(struct pnp_card_driver *drv); 462 extern struct list_head pnp_cards; 463 464 /* resource management */ 465 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base, 466 resource_size_t size); 467 int pnp_auto_config_dev(struct pnp_dev *dev); 468 int pnp_start_dev(struct pnp_dev *dev); 469 int pnp_stop_dev(struct pnp_dev *dev); 470 int pnp_activate_dev(struct pnp_dev *dev); 471 int pnp_disable_dev(struct pnp_dev *dev); 472 int pnp_range_reserved(resource_size_t start, resource_size_t end); 473 474 /* protocol helpers */ 475 int pnp_is_active(struct pnp_dev *dev); 476 int compare_pnp_id(struct pnp_id *pos, const char *id); 477 int pnp_register_driver(struct pnp_driver *drv); 478 void pnp_unregister_driver(struct pnp_driver *drv); 479 480 #else 481 482 /* device management */ 483 static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; } 484 static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { } 485 486 #define pnp_platform_devices 0 487 488 /* multidevice card support */ 489 static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; } 490 static inline void pnp_release_card_device(struct pnp_dev *dev) { } 491 static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; } 492 static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { } 493 494 /* resource management */ 495 static inline int pnp_possible_config(struct pnp_dev *dev, int type, 496 resource_size_t base, 497 resource_size_t size) { return 0; } 498 static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; } 499 static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; } 500 static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; } 501 static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; } 502 static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; } 503 static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;} 504 505 /* protocol helpers */ 506 static inline int pnp_is_active(struct pnp_dev *dev) { return 0; } 507 static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; } 508 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; } 509 static inline void pnp_unregister_driver(struct pnp_driver *drv) { } 510 511 #endif /* CONFIG_PNP */ 512 513 /** 514 * module_pnp_driver() - Helper macro for registering a PnP driver 515 * @__pnp_driver: pnp_driver struct 516 * 517 * Helper macro for PnP drivers which do not do anything special in module 518 * init/exit. This eliminates a lot of boilerplate. Each module may only 519 * use this macro once, and calling it replaces module_init() and module_exit() 520 */ 521 #define module_pnp_driver(__pnp_driver) \ 522 module_driver(__pnp_driver, pnp_register_driver, \ 523 pnp_unregister_driver) 524 525 #endif /* _LINUX_PNP_H */ 526