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TOMOYO Linux Cross Reference
Linux/include/linux/pnp.h

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  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 resource_size(res);
 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 #ifdef CONFIG_PNPACPI
338 extern struct pnp_protocol pnpacpi_protocol;
339 
340 static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev)
341 {
342         if (dev->protocol == &pnpacpi_protocol)
343                 return dev->data;
344         return NULL;
345 }
346 #else
347 #define pnp_acpi_device(dev) 0
348 #endif
349 
350 /* status */
351 #define PNP_READY               0x0000
352 #define PNP_ATTACHED            0x0001
353 #define PNP_BUSY                0x0002
354 #define PNP_FAULTY              0x0004
355 
356 /* isapnp specific macros */
357 
358 #define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1)
359 #define isapnp_csn_number(dev)  ((dev)->number)
360 
361 /*
362  * Driver Management
363  */
364 
365 struct pnp_id {
366         char id[PNP_ID_LEN];
367         struct pnp_id *next;
368 };
369 
370 struct pnp_driver {
371         char *name;
372         const struct pnp_device_id *id_table;
373         unsigned int flags;
374         int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
375         void (*remove) (struct pnp_dev *dev);
376         void (*shutdown) (struct pnp_dev *dev);
377         int (*suspend) (struct pnp_dev *dev, pm_message_t state);
378         int (*resume) (struct pnp_dev *dev);
379         struct device_driver driver;
380 };
381 
382 #define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
383 
384 struct pnp_card_driver {
385         struct list_head global_list;
386         char *name;
387         const struct pnp_card_device_id *id_table;
388         unsigned int flags;
389         int (*probe) (struct pnp_card_link *card,
390                       const struct pnp_card_device_id *card_id);
391         void (*remove) (struct pnp_card_link *card);
392         int (*suspend) (struct pnp_card_link *card, pm_message_t state);
393         int (*resume) (struct pnp_card_link *card);
394         struct pnp_driver link;
395 };
396 
397 #define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
398 
399 /* pnp driver flags */
400 #define PNP_DRIVER_RES_DO_NOT_CHANGE    0x0001  /* do not change the state of the device */
401 #define PNP_DRIVER_RES_DISABLE          0x0003  /* ensure the device is disabled */
402 
403 /*
404  * Protocol Management
405  */
406 
407 struct pnp_protocol {
408         struct list_head protocol_list;
409         char *name;
410 
411         /* resource control functions */
412         int (*get) (struct pnp_dev *dev);
413         int (*set) (struct pnp_dev *dev);
414         int (*disable) (struct pnp_dev *dev);
415 
416         /* protocol specific suspend/resume */
417         bool (*can_wakeup) (struct pnp_dev *dev);
418         int (*suspend) (struct pnp_dev * dev, pm_message_t state);
419         int (*resume) (struct pnp_dev * dev);
420 
421         /* used by pnp layer only (look but don't touch) */
422         unsigned char number;   /* protocol number */
423         struct device dev;      /* link to driver model */
424         struct list_head cards;
425         struct list_head devices;
426 };
427 
428 #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
429 #define protocol_for_each_card(protocol,card) \
430         for((card) = protocol_to_pnp_card((protocol)->cards.next); \
431         (card) != protocol_to_pnp_card(&(protocol)->cards); \
432         (card) = protocol_to_pnp_card((card)->protocol_list.next))
433 #define protocol_for_each_dev(protocol,dev) \
434         for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
435         (dev) != protocol_to_pnp_dev(&(protocol)->devices); \
436         (dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
437 
438 extern struct bus_type pnp_bus_type;
439 
440 #if defined(CONFIG_PNP)
441 
442 /* device management */
443 int pnp_device_attach(struct pnp_dev *pnp_dev);
444 void pnp_device_detach(struct pnp_dev *pnp_dev);
445 extern struct list_head pnp_global;
446 extern int pnp_platform_devices;
447 
448 /* multidevice card support */
449 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
450                                         const char *id, struct pnp_dev *from);
451 void pnp_release_card_device(struct pnp_dev *dev);
452 int pnp_register_card_driver(struct pnp_card_driver *drv);
453 void pnp_unregister_card_driver(struct pnp_card_driver *drv);
454 extern struct list_head pnp_cards;
455 
456 /* resource management */
457 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
458                         resource_size_t size);
459 int pnp_auto_config_dev(struct pnp_dev *dev);
460 int pnp_start_dev(struct pnp_dev *dev);
461 int pnp_stop_dev(struct pnp_dev *dev);
462 int pnp_activate_dev(struct pnp_dev *dev);
463 int pnp_disable_dev(struct pnp_dev *dev);
464 int pnp_range_reserved(resource_size_t start, resource_size_t end);
465 
466 /* protocol helpers */
467 int pnp_is_active(struct pnp_dev *dev);
468 int compare_pnp_id(struct pnp_id *pos, const char *id);
469 int pnp_register_driver(struct pnp_driver *drv);
470 void pnp_unregister_driver(struct pnp_driver *drv);
471 
472 #else
473 
474 /* device management */
475 static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
476 static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
477 
478 #define pnp_platform_devices 0
479 
480 /* multidevice card support */
481 static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
482 static inline void pnp_release_card_device(struct pnp_dev *dev) { }
483 static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
484 static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
485 
486 /* resource management */
487 static inline int pnp_possible_config(struct pnp_dev *dev, int type,
488                                       resource_size_t base,
489                                       resource_size_t size) { return 0; }
490 static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
491 static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
492 static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
493 static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
494 static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
495 static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0;}
496 
497 /* protocol helpers */
498 static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
499 static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
500 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
501 static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
502 
503 #endif /* CONFIG_PNP */
504 
505 #endif /* _LINUX_PNP_H */
506 

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