include/linux/pnp.h

   1 /*
   2  * Linux Plug and Play Support
   3  * Copyright by Adam Belay <ambx1@neo.rr.com>
   4  */
   5
   6 #ifndef _LINUX_PNP_H
   7 #define _LINUX_PNP_H
   8
   9 #include <linux/device.h>
  10 #include <linux/list.h>
  11 #include <linux/errno.h>
  12 #include <linux/mod_devicetable.h>
  13
  14 #define PNP_NAME_LEN            50
  15
  16 struct pnp_protocol;
  17 struct pnp_dev;
  18
  19 /*
  20  * Resource Management
  21  */
  22 struct resource *pnp_get_resource(struct pnp_dev *, unsigned int, unsigned int);
  23
  24 static inline int pnp_resource_valid(struct resource *res)
  25 {
  26         if (res)
  27                 return 1;
  28         return 0;
  29 }
  30
  31 static inline int pnp_resource_enabled(struct resource *res)
  32 {
  33         if (res && !(res->flags & IORESOURCE_DISABLED))
  34                 return 1;
  35         return 0;
  36 }
  37
  38 static inline resource_size_t pnp_resource_len(struct resource *res)
  39 {
  40         if (res->start == 0 && res->end == 0)
  41                 return 0;
  42         return res->end - res->start + 1;
  43 }
  44
  45
  46 static inline resource_size_t pnp_port_start(struct pnp_dev *dev,
  47                                              unsigned int bar)
  48 {
  49         struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
  50
  51         if (pnp_resource_valid(res))
  52                 return res->start;
  53         return 0;
  54 }
  55
  56 static inline resource_size_t pnp_port_end(struct pnp_dev *dev,
  57                                            unsigned int bar)
  58 {
  59         struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
  60
  61         if (pnp_resource_valid(res))
  62                 return res->end;
  63         return 0;
  64 }
  65
  66 static inline unsigned long pnp_port_flags(struct pnp_dev *dev,
  67                                            unsigned int bar)
  68 {
  69         struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
  70
  71         if (pnp_resource_valid(res))
  72                 return res->flags;
  73         return IORESOURCE_IO | IORESOURCE_AUTO;
  74 }
  75
  76 static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar)
  77 {
  78         return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IO, bar));
  79 }
  80
  81 static inline resource_size_t pnp_port_len(struct pnp_dev *dev,
  82                                            unsigned int bar)
  83 {
  84         struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
  85
  86         if (pnp_resource_valid(res))
  87                 return pnp_resource_len(res);
  88         return 0;
  89 }
  90
  91
  92 static inline resource_size_t pnp_mem_start(struct pnp_dev *dev,
  93                                             unsigned int bar)
  94 {
  95         struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
  96
  97         if (pnp_resource_valid(res))
  98                 return res->start;
  99         return 0;
 100 }
 101
 102 static inline resource_size_t pnp_mem_end(struct pnp_dev *dev,
 103                                           unsigned int bar)
 104 {
 105         struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
 106
 107         if (pnp_resource_valid(res))
 108                 return res->end;
 109         return 0;
 110 }
 111
 112 static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar)
 113 {
 114         struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
 115
 116         if (pnp_resource_valid(res))
 117                 return res->flags;
 118         return IORESOURCE_MEM | IORESOURCE_AUTO;
 119 }
 120
 121 static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar)
 122 {
 123         return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_MEM, bar));
 124 }
 125
 126 static inline resource_size_t pnp_mem_len(struct pnp_dev *dev,
 127                                           unsigned int bar)
 128 {
 129         struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
 130
 131         if (pnp_resource_valid(res))
 132                 return pnp_resource_len(res);
 133         return 0;
 134 }
 135
 136
 137 static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar)
 138 {
 139         struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
 140
 141         if (pnp_resource_valid(res))
 142                 return res->start;
 143         return -1;
 144 }
 145
 146 static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar)
 147 {
 148         struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
 149
 150         if (pnp_resource_valid(res))
 151                 return res->flags;
 152         return IORESOURCE_IRQ | IORESOURCE_AUTO;
 153 }
 154
 155 static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar)
 156 {
 157         return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IRQ, bar));
 158 }
 159
 160
 161 static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar)
 162 {
 163         struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
 164
 165         if (pnp_resource_valid(res))
 166                 return res->start;
 167         return -1;
 168 }
 169
 170 static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar)
 171 {
 172         struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
 173
 174         if (pnp_resource_valid(res))
 175                 return res->flags;
 176         return IORESOURCE_DMA | IORESOURCE_AUTO;
 177 }
 178
 179 static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar)
 180 {
 181         return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_DMA, bar));
 182 }
 183
 184
 185 #define PNP_PORT_FLAG_16BITADDR (1<<0)
 186 #define PNP_PORT_FLAG_FIXED     (1<<1)
 187
 188 struct pnp_port {
 189         unsigned short min;     /* min base number */
 190         unsigned short max;     /* max base number */
 191         unsigned char align;    /* align boundary */
 192         unsigned char size;     /* size of range */
 193         unsigned char flags;    /* port flags */
 194         unsigned char pad;      /* pad */
 195         struct pnp_port *next;  /* next port */
 196 };
 197
 198 #define PNP_IRQ_NR 256
 199 struct pnp_irq {
 200         DECLARE_BITMAP(map, PNP_IRQ_NR);        /* bitmask for IRQ lines */
 201         unsigned char flags;    /* IRQ flags */
 202         unsigned char pad;      /* pad */
 203         struct pnp_irq *next;   /* next IRQ */
 204 };
 205
 206 struct pnp_dma {
 207         unsigned char map;      /* bitmask for DMA channels */
 208         unsigned char flags;    /* DMA flags */
 209         struct pnp_dma *next;   /* next port */
 210 };
 211
 212 struct pnp_mem {
 213         unsigned int min;       /* min base number */
 214         unsigned int max;       /* max base number */
 215         unsigned int align;     /* align boundary */
 216         unsigned int size;      /* size of range */
 217         unsigned char flags;    /* memory flags */
 218         unsigned char pad;      /* pad */
 219         struct pnp_mem *next;   /* next memory resource */
 220 };
 221
 222 #define PNP_RES_PRIORITY_PREFERRED      0
 223 #define PNP_RES_PRIORITY_ACCEPTABLE     1
 224 #define PNP_RES_PRIORITY_FUNCTIONAL     2
 225 #define PNP_RES_PRIORITY_INVALID        65535
 226
 227 struct pnp_option {
 228         unsigned short priority;        /* priority */
 229         struct pnp_port *port;          /* first port */
 230         struct pnp_irq *irq;            /* first IRQ */
 231         struct pnp_dma *dma;            /* first DMA */
 232         struct pnp_mem *mem;            /* first memory resource */
 233         struct pnp_option *next;        /* used to chain dependent resources */
 234 };
 235
 236 /*
 237  * Device Management
 238  */
 239
 240 struct pnp_card {
 241         struct device dev;              /* Driver Model device interface */
 242         unsigned char number;           /* used as an index, must be unique */
 243         struct list_head global_list;   /* node in global list of cards */
 244         struct list_head protocol_list; /* node in protocol's list of cards */
 245         struct list_head devices;       /* devices attached to the card */
 246
 247         struct pnp_protocol *protocol;
 248         struct pnp_id *id;              /* contains supported EISA IDs */
 249
 250         char name[PNP_NAME_LEN];        /* contains a human-readable name */
 251         unsigned char pnpver;           /* Plug & Play version */
 252         unsigned char productver;       /* product version */
 253         unsigned int serial;            /* serial number */
 254         unsigned char checksum;         /* if zero - checksum passed */
 255         struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */
 256 };
 257
 258 #define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list)
 259 #define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list)
 260 #define to_pnp_card(n) container_of(n, struct pnp_card, dev)
 261 #define pnp_for_each_card(card) \
 262         for((card) = global_to_pnp_card(pnp_cards.next); \
 263         (card) != global_to_pnp_card(&pnp_cards); \
 264         (card) = global_to_pnp_card((card)->global_list.next))
 265
 266 struct pnp_card_link {
 267         struct pnp_card *card;
 268         struct pnp_card_driver *driver;
 269         void *driver_data;
 270         pm_message_t pm_state;
 271 };
 272
 273 static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard)
 274 {
 275         return pcard->driver_data;
 276 }
 277
 278 static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data)
 279 {
 280         pcard->driver_data = data;
 281 }
 282
 283 struct pnp_dev {
 284         struct device dev;              /* Driver Model device interface */
 285         u64 dma_mask;
 286         unsigned int number;            /* used as an index, must be unique */
 287         int status;
 288
 289         struct list_head global_list;   /* node in global list of devices */
 290         struct list_head protocol_list; /* node in list of device's protocol */
 291         struct list_head card_list;     /* node in card's list of devices */
 292         struct list_head rdev_list;     /* node in cards list of requested devices */
 293
 294         struct pnp_protocol *protocol;
 295         struct pnp_card *card;  /* card the device is attached to, none if NULL */
 296         struct pnp_driver *driver;
 297         struct pnp_card_link *card_link;
 298
 299         struct pnp_id *id;              /* supported EISA IDs */
 300
 301         int active;
 302         int capabilities;
 303         struct pnp_option *independent;
 304         struct pnp_option *dependent;
 305         struct list_head resources;
 306
 307         char name[PNP_NAME_LEN];        /* contains a human-readable name */
 308         int flags;                      /* used by protocols */
 309         struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */
 310         void *data;
 311 };
 312
 313 #define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list)
 314 #define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list)
 315 #define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list)
 316 #define to_pnp_dev(n) container_of(n, struct pnp_dev, dev)
 317 #define pnp_for_each_dev(dev) \
 318         for((dev) = global_to_pnp_dev(pnp_global.next); \
 319         (dev) != global_to_pnp_dev(&pnp_global); \
 320         (dev) = global_to_pnp_dev((dev)->global_list.next))
 321 #define card_for_each_dev(card,dev) \
 322         for((dev) = card_to_pnp_dev((card)->devices.next); \
 323         (dev) != card_to_pnp_dev(&(card)->devices); \
 324         (dev) = card_to_pnp_dev((dev)->card_list.next))
 325 #define pnp_dev_name(dev) (dev)->name
 326
 327 static inline void *pnp_get_drvdata(struct pnp_dev *pdev)
 328 {
 329         return dev_get_drvdata(&pdev->dev);
 330 }
 331
 332 static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data)
 333 {
 334         dev_set_drvdata(&pdev->dev, data);
 335 }
 336
 337 struct pnp_fixup {
 338         char id[7];
 339         void (*quirk_function) (struct pnp_dev * dev);  /* fixup function */
 340 };
 341
 342 /* config parameters */
 343 #define PNP_CONFIG_NORMAL       0x0001
 344 #define PNP_CONFIG_FORCE        0x0002  /* disables validity checking */
 345
 346 /* capabilities */
 347 #define PNP_READ                0x0001
 348 #define PNP_WRITE               0x0002
 349 #define PNP_DISABLE             0x0004
 350 #define PNP_CONFIGURABLE        0x0008
 351 #define PNP_REMOVABLE           0x0010
 352
 353 #define pnp_can_read(dev)       (((dev)->protocol->get) && \
 354                                  ((dev)->capabilities & PNP_READ))
 355 #define pnp_can_write(dev)      (((dev)->protocol->set) && \
 356                                  ((dev)->capabilities & PNP_WRITE))
 357 #define pnp_can_disable(dev)    (((dev)->protocol->disable) && \
 358                                  ((dev)->capabilities & PNP_DISABLE))
 359 #define pnp_can_configure(dev)  ((!(dev)->active) && \
 360                                  ((dev)->capabilities & PNP_CONFIGURABLE))
 361
 362 #ifdef CONFIG_ISAPNP
 363 extern struct pnp_protocol isapnp_protocol;
 364 #define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol))
 365 #else
 366 #define pnp_device_is_isapnp(dev) 0
 367 #endif
 368 extern struct mutex pnp_res_mutex;
 369
 370 #ifdef CONFIG_PNPBIOS
 371 extern struct pnp_protocol pnpbios_protocol;
 372 #define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol))
 373 #else
 374 #define pnp_device_is_pnpbios(dev) 0
 375 #endif
 376
 377 /* status */
 378 #define PNP_READY               0x0000
 379 #define PNP_ATTACHED            0x0001
 380 #define PNP_BUSY                0x0002
 381 #define PNP_FAULTY              0x0004
 382
 383 /* isapnp specific macros */
 384
 385 #define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1)
 386 #define isapnp_csn_number(dev)  ((dev)->number)
 387
 388 /*
 389  * Driver Management
 390  */
 391
 392 struct pnp_id {
 393         char id[PNP_ID_LEN];
 394         struct pnp_id *next;
 395 };
 396
 397 struct pnp_driver {
 398         char *name;
 399         const struct pnp_device_id *id_table;
 400         unsigned int flags;
 401         int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
 402         void (*remove) (struct pnp_dev *dev);
 403         int (*suspend) (struct pnp_dev *dev, pm_message_t state);
 404         int (*resume) (struct pnp_dev *dev);
 405         struct device_driver driver;
 406 };
 407
 408 #define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
 409
 410 struct pnp_card_driver {
 411         struct list_head global_list;
 412         char *name;
 413         const struct pnp_card_device_id *id_table;
 414         unsigned int flags;
 415         int (*probe) (struct pnp_card_link *card,
 416                       const struct pnp_card_device_id *card_id);
 417         void (*remove) (struct pnp_card_link *card);
 418         int (*suspend) (struct pnp_card_link *card, pm_message_t state);
 419         int (*resume) (struct pnp_card_link *card);
 420         struct pnp_driver link;
 421 };
 422
 423 #define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
 424
 425 /* pnp driver flags */
 426 #define PNP_DRIVER_RES_DO_NOT_CHANGE    0x0001  /* do not change the state of the device */
 427 #define PNP_DRIVER_RES_DISABLE          0x0003  /* ensure the device is disabled */
 428
 429 /*
 430  * Protocol Management
 431  */
 432
 433 struct pnp_protocol {
 434         struct list_head protocol_list;
 435         char *name;
 436
 437         /* resource control functions */
 438         int (*get) (struct pnp_dev *dev);
 439         int (*set) (struct pnp_dev *dev);
 440         int (*disable) (struct pnp_dev *dev);
 441
 442         /* protocol specific suspend/resume */
 443         int (*suspend) (struct pnp_dev * dev, pm_message_t state);
 444         int (*resume) (struct pnp_dev * dev);
 445
 446         /* used by pnp layer only (look but don't touch) */
 447         unsigned char number;   /* protocol number */
 448         struct device dev;      /* link to driver model */
 449         struct list_head cards;
 450         struct list_head devices;
 451 };
 452
 453 #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
 454 #define protocol_for_each_card(protocol,card) \
 455         for((card) = protocol_to_pnp_card((protocol)->cards.next); \
 456         (card) != protocol_to_pnp_card(&(protocol)->cards); \
 457         (card) = protocol_to_pnp_card((card)->protocol_list.next))
 458 #define protocol_for_each_dev(protocol,dev) \
 459         for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
 460         (dev) != protocol_to_pnp_dev(&(protocol)->devices); \
 461         (dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
 462
 463 extern struct bus_type pnp_bus_type;
 464
 465 #if defined(CONFIG_PNP)
 466
 467 /* device management */
 468 int pnp_device_attach(struct pnp_dev *pnp_dev);
 469 void pnp_device_detach(struct pnp_dev *pnp_dev);
 470 extern struct list_head pnp_global;
 471 extern int pnp_platform_devices;
 472
 473 /* multidevice card support */
 474 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
 475                                         const char *id, struct pnp_dev *from);
 476 void pnp_release_card_device(struct pnp_dev *dev);
 477 int pnp_register_card_driver(struct pnp_card_driver *drv);
 478 void pnp_unregister_card_driver(struct pnp_card_driver *drv);
 479 extern struct list_head pnp_cards;
 480
 481 /* resource management */
 482 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
 483                         resource_size_t size);
 484 int pnp_auto_config_dev(struct pnp_dev *dev);
 485 int pnp_start_dev(struct pnp_dev *dev);
 486 int pnp_stop_dev(struct pnp_dev *dev);
 487 int pnp_activate_dev(struct pnp_dev *dev);
 488 int pnp_disable_dev(struct pnp_dev *dev);
 489
 490 /* protocol helpers */
 491 int pnp_is_active(struct pnp_dev *dev);
 492 int compare_pnp_id(struct pnp_id *pos, const char *id);
 493 int pnp_register_driver(struct pnp_driver *drv);
 494 void pnp_unregister_driver(struct pnp_driver *drv);
 495
 496 #else
 497
 498 /* device management */
 499 static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
 500 static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
 501
 502 #define pnp_platform_devices 0
 503
 504 /* multidevice card support */
 505 static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
 506 static inline void pnp_release_card_device(struct pnp_dev *dev) { }
 507 static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
 508 static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
 509
 510 /* resource management */
 511 static inline int pnp_possible_config(struct pnp_dev *dev, int type,
 512                                       resource_size_t base,
 513                                       resource_size_t size) { return 0; }
 514 static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
 515 static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
 516 static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
 517 static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
 518 static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
 519
 520 /* protocol helpers */
 521 static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
 522 static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
 523 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
 524 static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
 525
 526 #endif /* CONFIG_PNP */
 527
 528 #define pnp_err(format, arg...) printk(KERN_ERR "pnp: " format "\n" , ## arg)
 529 #define pnp_info(format, arg...) printk(KERN_INFO "pnp: " format "\n" , ## arg)
 530 #define pnp_warn(format, arg...) printk(KERN_WARNING "pnp: " format "\n" , ## arg)
 531
 532 #ifdef CONFIG_PNP_DEBUG
 533 #define pnp_dbg(format, arg...) printk(KERN_DEBUG "pnp: " format "\n" , ## arg)
 534 #else
 535 #define pnp_dbg(format, arg...) do {} while (0)
 536 #endif
 537
 538 #endif /* _LINUX_PNP_H */