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