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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
pnp_get_resource(struct pnp_dev * dev,unsigned long type,unsigned int num)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 
pnp_resource_valid(struct resource * res)35 static inline int pnp_resource_valid(struct resource *res)
36 {
37 	if (res)
38 		return 1;
39 	return 0;
40 }
41 
pnp_resource_enabled(struct resource * res)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 
pnp_resource_len(struct resource * res)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 
pnp_port_start(struct pnp_dev * dev,unsigned int bar)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 
pnp_port_end(struct pnp_dev * dev,unsigned int bar)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 
pnp_port_flags(struct pnp_dev * dev,unsigned int bar)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 
pnp_port_valid(struct pnp_dev * dev,unsigned int bar)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 
pnp_port_len(struct pnp_dev * dev,unsigned int bar)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 
pnp_mem_start(struct pnp_dev * dev,unsigned int bar)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 
pnp_mem_end(struct pnp_dev * dev,unsigned int bar)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 
pnp_mem_flags(struct pnp_dev * dev,unsigned int bar)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 
pnp_mem_valid(struct pnp_dev * dev,unsigned int bar)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 
pnp_mem_len(struct pnp_dev * dev,unsigned int bar)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 
pnp_irq(struct pnp_dev * dev,unsigned int bar)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 
pnp_irq_flags(struct pnp_dev * dev,unsigned int bar)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 
pnp_irq_valid(struct pnp_dev * dev,unsigned int bar)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 
pnp_dma(struct pnp_dev * dev,unsigned int bar)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 
pnp_dma_flags(struct pnp_dev * dev,unsigned int bar)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 
pnp_dma_valid(struct pnp_dev * dev,unsigned int bar)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 
pnp_get_card_drvdata(struct pnp_card_link * pcard)233 static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard)
234 {
235 	return pcard->driver_data;
236 }
237 
pnp_set_card_drvdata(struct pnp_card_link * pcard,void * data)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 
pnp_get_drvdata(struct pnp_dev * pdev)287 static inline void *pnp_get_drvdata(struct pnp_dev *pdev)
288 {
289 	return dev_get_drvdata(&pdev->dev);
290 }
291 
pnp_set_drvdata(struct pnp_dev * pdev,void * data)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 	int (*suspend) (struct pnp_dev *dev, pm_message_t state);
364 	int (*resume) (struct pnp_dev *dev);
365 	struct device_driver driver;
366 };
367 
368 #define	to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver)
369 
370 struct pnp_card_driver {
371 	struct list_head global_list;
372 	char *name;
373 	const struct pnp_card_device_id *id_table;
374 	unsigned int flags;
375 	int (*probe) (struct pnp_card_link *card,
376 		      const struct pnp_card_device_id *card_id);
377 	void (*remove) (struct pnp_card_link *card);
378 	int (*suspend) (struct pnp_card_link *card, pm_message_t state);
379 	int (*resume) (struct pnp_card_link *card);
380 	struct pnp_driver link;
381 };
382 
383 #define	to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link)
384 
385 /* pnp driver flags */
386 #define PNP_DRIVER_RES_DO_NOT_CHANGE	0x0001	/* do not change the state of the device */
387 #define PNP_DRIVER_RES_DISABLE		0x0003	/* ensure the device is disabled */
388 
389 /*
390  * Protocol Management
391  */
392 
393 struct pnp_protocol {
394 	struct list_head protocol_list;
395 	char *name;
396 
397 	/* resource control functions */
398 	int (*get) (struct pnp_dev *dev);
399 	int (*set) (struct pnp_dev *dev);
400 	int (*disable) (struct pnp_dev *dev);
401 
402 	/* protocol specific suspend/resume */
403 	int (*suspend) (struct pnp_dev * dev, pm_message_t state);
404 	int (*resume) (struct pnp_dev * dev);
405 
406 	/* used by pnp layer only (look but don't touch) */
407 	unsigned char number;	/* protocol number */
408 	struct device dev;	/* link to driver model */
409 	struct list_head cards;
410 	struct list_head devices;
411 };
412 
413 #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list)
414 #define protocol_for_each_card(protocol,card) \
415 	for((card) = protocol_to_pnp_card((protocol)->cards.next); \
416 	(card) != protocol_to_pnp_card(&(protocol)->cards); \
417 	(card) = protocol_to_pnp_card((card)->protocol_list.next))
418 #define protocol_for_each_dev(protocol,dev) \
419 	for((dev) = protocol_to_pnp_dev((protocol)->devices.next); \
420 	(dev) != protocol_to_pnp_dev(&(protocol)->devices); \
421 	(dev) = protocol_to_pnp_dev((dev)->protocol_list.next))
422 
423 extern struct bus_type pnp_bus_type;
424 
425 #if defined(CONFIG_PNP)
426 
427 /* device management */
428 int pnp_device_attach(struct pnp_dev *pnp_dev);
429 void pnp_device_detach(struct pnp_dev *pnp_dev);
430 extern struct list_head pnp_global;
431 extern int pnp_platform_devices;
432 
433 /* multidevice card support */
434 struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
435 					const char *id, struct pnp_dev *from);
436 void pnp_release_card_device(struct pnp_dev *dev);
437 int pnp_register_card_driver(struct pnp_card_driver *drv);
438 void pnp_unregister_card_driver(struct pnp_card_driver *drv);
439 extern struct list_head pnp_cards;
440 
441 /* resource management */
442 int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base,
443 			resource_size_t size);
444 int pnp_auto_config_dev(struct pnp_dev *dev);
445 int pnp_start_dev(struct pnp_dev *dev);
446 int pnp_stop_dev(struct pnp_dev *dev);
447 int pnp_activate_dev(struct pnp_dev *dev);
448 int pnp_disable_dev(struct pnp_dev *dev);
449 
450 /* protocol helpers */
451 int pnp_is_active(struct pnp_dev *dev);
452 int compare_pnp_id(struct pnp_id *pos, const char *id);
453 int pnp_register_driver(struct pnp_driver *drv);
454 void pnp_unregister_driver(struct pnp_driver *drv);
455 
456 #else
457 
458 /* device management */
pnp_device_attach(struct pnp_dev * pnp_dev)459 static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
pnp_device_detach(struct pnp_dev * pnp_dev)460 static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { }
461 
462 #define pnp_platform_devices 0
463 
464 /* multidevice card support */
pnp_request_card_device(struct pnp_card_link * clink,const char * id,struct pnp_dev * from)465 static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; }
pnp_release_card_device(struct pnp_dev * dev)466 static inline void pnp_release_card_device(struct pnp_dev *dev) { }
pnp_register_card_driver(struct pnp_card_driver * drv)467 static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; }
pnp_unregister_card_driver(struct pnp_card_driver * drv)468 static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { }
469 
470 /* resource management */
pnp_possible_config(struct pnp_dev * dev,int type,resource_size_t base,resource_size_t size)471 static inline int pnp_possible_config(struct pnp_dev *dev, int type,
472 				      resource_size_t base,
473 				      resource_size_t size) { return 0; }
pnp_auto_config_dev(struct pnp_dev * dev)474 static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; }
pnp_start_dev(struct pnp_dev * dev)475 static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; }
pnp_stop_dev(struct pnp_dev * dev)476 static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; }
pnp_activate_dev(struct pnp_dev * dev)477 static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; }
pnp_disable_dev(struct pnp_dev * dev)478 static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; }
479 
480 /* protocol helpers */
pnp_is_active(struct pnp_dev * dev)481 static inline int pnp_is_active(struct pnp_dev *dev) { return 0; }
compare_pnp_id(struct pnp_id * pos,const char * id)482 static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; }
pnp_register_driver(struct pnp_driver * drv)483 static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; }
pnp_unregister_driver(struct pnp_driver * drv)484 static inline void pnp_unregister_driver(struct pnp_driver *drv) { }
485 
486 #endif /* CONFIG_PNP */
487 
488 #endif /* _LINUX_PNP_H */
489