include/linux/pnp.h

   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 extern bool arch_pnpbios_disabled(void);
 341 #define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol))
 342 #else
 343 #define pnp_device_is_pnpbios(dev) 0
 344 #define arch_pnpbios_disabled() false
 345 #endif
 346
 347 #ifdef CONFIG_PNPACPI
 348 extern struct pnp_protocol pnpacpi_protocol;
 349
 350 static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev)
 351 {
 352         if (dev->protocol == &pnpacpi_protocol)
 353                 return dev->data;
 354         return NULL;
 355 }
 356 #else
 357 #define pnp_acpi_device(dev) 0
 358 #endif
 359
 360 /* status */
 361 #define PNP_READY               0x0000
 362 #define PNP_ATTACHED            0x0001
 363 #define PNP_BUSY                0x0002
 364 #define PNP_FAULTY              0x0004
 365
 366 /* isapnp specific macros */
 367
 368 #define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1)
 369 #define isapnp_csn_number(dev)  ((dev)->number)
 370
 371 /*
 372  * Driver Management
 373  */
 374
 375 struct pnp_id {
 376         char id[PNP_ID_LEN];
 377         struct pnp_id *next;
 378 };
 379
 380 struct pnp_driver {
 381         char *name;
 382         const struct pnp_device_id *id_table;
 383         unsigned int flags;
 384         int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
 385         void (*remove) (struct pnp_dev *dev);
 386         void (*shutdown) (struct pnp_dev *dev);
 387         int (*suspend) (struct pnp_dev *dev, pm_message_t state);
 388         int (*resume) (struct pnp_dev *dev);
 389         struct device_driver driver;
 390 };
 391
 392 #define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
 393
 394 struct pnp_card_driver {
 395         struct list_head global_list;
 396         char *name;
 397         const struct pnp_card_device_id *id_table;
 398         unsigned int flags;
 399         int (*probe) (struct pnp_card_link *card,
 400                       const struct pnp_card_device_id *card_id);
 401         void (*remove) (struct pnp_card_link *card);
 402         int (*suspend) (struct pnp_card_link *card, pm_message_t state);
 403         int (*resume) (struct pnp_card_link *card);
 404         struct pnp_driver link;
 405 };
 406
 407 #define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
 408
 409 /* pnp driver flags */
 410 #define PNP_DRIVER_RES_DO_NOT_CHANGE    0x0001  /* do not change the state of the device */
 411 #define PNP_DRIVER_RES_DISABLE          0x0003  /* ensure the device is disabled */
 412
 413 /*
 414  * Protocol Management
 415  */
 416
 417 struct pnp_protocol {
 418         struct list_head protocol_list;
 419         char *name;
 420
 421         /* resource control functions */
 422         int (*get) (struct pnp_dev *dev);
 423         int (*set) (struct pnp_dev *dev);
 424         int (*disable) (struct pnp_dev *dev);
 425
 426         /* protocol specific suspend/resume */
 427         bool (*can_wakeup) (struct pnp_dev *dev);
 428         int (*suspend) (struct pnp_dev * dev, pm_message_t state);
 429         int (*resume) (struct pnp_dev * dev);
 430
 431         /* used by pnp layer only (look but don't touch) */
 432         unsigned char number;   /* protocol number */
 433         struct device dev;      /* link to driver model */
 434         struct list_head cards;
 435         struct list_head devices;
 436 };
 437
 438 #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
 439 #define protocol_for_each_card(protocol,card) \
 440         for((card) = protocol_to_pnp_card((protocol)->cards.next); \
 441         (card) != protocol_to_pnp_card(&(protocol)->cards); \
 442         (card) = protocol_to_pnp_card((card)->protocol_list.next))
 443 #define protocol_for_each_dev(protocol,dev) \
 444         for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
 445         (dev) != protocol_to_pnp_dev(&(protocol)->devices); \
 446         (dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
 447
 448 extern struct bus_type pnp_bus_type;
 449
 450 #if defined(CONFIG_PNP)
 451
 452 /* device management */
 453 int pnp_device_attach(struct pnp_dev *pnp_dev);
 454 void pnp_device_detach(struct pnp_dev *pnp_dev);
 455 extern struct list_head pnp_global;
 456 extern int pnp_platform_devices;
 457
 458 /* multidevice card support */
 459 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
 460                                         const char *id, struct pnp_dev *from);
 461 void pnp_release_card_device(struct pnp_dev *dev);
 462 int pnp_register_card_driver(struct pnp_card_driver *drv);
 463 void pnp_unregister_card_driver(struct pnp_card_driver *drv);
 464 extern struct list_head pnp_cards;
 465
 466 /* resource management */
 467 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
 468                         resource_size_t size);
 469 int pnp_auto_config_dev(struct pnp_dev *dev);
 470 int pnp_start_dev(struct pnp_dev *dev);
 471 int pnp_stop_dev(struct pnp_dev *dev);
 472 int pnp_activate_dev(struct pnp_dev *dev);
 473 int pnp_disable_dev(struct pnp_dev *dev);
 474 int pnp_range_reserved(resource_size_t start, resource_size_t end);
 475
 476 /* protocol helpers */
 477 int pnp_is_active(struct pnp_dev *dev);
 478 int compare_pnp_id(struct pnp_id *pos, const char *id);
 479 int pnp_register_driver(struct pnp_driver *drv);
 480 void pnp_unregister_driver(struct pnp_driver *drv);
 481
 482 #else
 483
 484 /* device management */
 485 static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
 486 static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
 487
 488 #define pnp_platform_devices 0
 489
 490 /* multidevice card support */
 491 static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
 492 static inline void pnp_release_card_device(struct pnp_dev *dev) { }
 493 static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
 494 static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
 495
 496 /* resource management */
 497 static inline int pnp_possible_config(struct pnp_dev *dev, int type,
 498                                       resource_size_t base,
 499                                       resource_size_t size) { return 0; }
 500 static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
 501 static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
 502 static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
 503 static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
 504 static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
 505 static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;}
 506
 507 /* protocol helpers */
 508 static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
 509 static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
 510 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
 511 static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
 512
 513 #endif /* CONFIG_PNP */
 514
 515 /**
 516  * module_pnp_driver() - Helper macro for registering a PnP driver
 517  * @__pnp_driver: pnp_driver struct
 518  *
 519  * Helper macro for PnP drivers which do not do anything special in module
 520  * init/exit. This eliminates a lot of boilerplate. Each module may only
 521  * use this macro once, and calling it replaces module_init() and module_exit()
 522  */
 523 #define module_pnp_driver(__pnp_driver) \
 524         module_driver(__pnp_driver, pnp_register_driver, \
 525                                     pnp_unregister_driver)
 526
 527 #endif /* _LINUX_PNP_H */