2 * Copyright (c) 1997,1998 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/sys/bus.h,v 1.30.2.4 2002/10/10 15:13:33 jhb Exp $
27 * $DragonFly: src/sys/sys/bus.h,v 1.7 2004/02/21 06:37:01 dillon Exp $
35 #include <sys/queue.h>
39 * Forward declarations
41 typedef struct device *device_t;
42 typedef struct driver driver_t;
43 typedef struct devclass *devclass_t;
44 #define device_method_t kobj_method_t
46 typedef void driver_intr_t(void*);
49 * We define this in terms of bits because some devices may belong
50 * to multiple classes (and therefore need to be included in
51 * multiple interrupt masks, which is what this really serves to
52 * indicate. Buses which do interrupt remapping will want to
53 * change their type to reflect what sort of devices are underneath.
70 INTR_TRIGGER_CONFORM = 0,
71 INTR_TRIGGER_EDGE = 1,
72 INTR_TRIGGER_LEVEL = 2
76 INTR_POLARITY_CONFORM = 0,
77 INTR_POLARITY_HIGH = 1,
81 typedef int (*devop_t)(void);
85 void *priv; /* driver private data */
88 typedef enum device_state {
89 DS_NOTPRESENT, /* not probed or probe failed */
90 DS_ALIVE, /* probe succeeded */
91 DS_ATTACHED, /* attach method called */
92 DS_BUSY /* device is open */
96 * Definitions for drivers which need to keep simple lists of resources
97 * for their child devices.
101 struct resource_list_entry {
102 SLIST_ENTRY(resource_list_entry) link;
103 int type; /* type argument to alloc_resource */
104 int rid; /* resource identifier */
105 struct resource *res; /* the real resource when allocated */
106 u_long start; /* start of resource range */
107 u_long end; /* end of resource range */
108 u_long count; /* count within range */
110 SLIST_HEAD(resource_list, resource_list_entry);
113 * Initialise a resource list.
115 void resource_list_init(struct resource_list *rl);
118 * Reclaim memory used by a resource list.
120 void resource_list_free(struct resource_list *rl);
123 * Add a resource entry or modify an existing entry if one exists with
124 * the same type and rid.
126 void resource_list_add(struct resource_list *rl,
128 u_long start, u_long end, u_long count);
131 * Find a resource entry by type and rid.
133 struct resource_list_entry*
134 resource_list_find(struct resource_list *rl,
138 * Delete a resource entry.
140 void resource_list_delete(struct resource_list *rl,
144 * Implement BUS_ALLOC_RESOURCE by looking up a resource from the list
145 * and passing the allocation up to the parent of bus. This assumes
146 * that the first entry of device_get_ivars(child) is a struct
147 * resource_list. This also handles 'passthrough' allocations where a
148 * child is a remote descendant of bus by passing the allocation up to
152 resource_list_alloc(struct resource_list *rl,
153 device_t bus, device_t child,
155 u_long start, u_long end,
156 u_long count, u_int flags);
159 * Implement BUS_RELEASE_RESOURCE.
161 int resource_list_release(struct resource_list *rl,
162 device_t bus, device_t child,
163 int type, int rid, struct resource *res);
166 * Print all resources of a specified type, for use in bus_print_child.
167 * The name is printed if at least one resource of the given type is available.
168 * The format ist used to print resource start and end.
170 int resource_list_print_type(struct resource_list *rl,
171 const char *name, int type,
175 * The root bus, to which all top-level busses are attached.
177 extern device_t root_bus;
178 extern devclass_t root_devclass;
179 void root_bus_configure(void);
182 * Useful functions for implementing busses.
185 int bus_generic_activate_resource(device_t dev, device_t child, int type,
186 int rid, struct resource *r);
188 bus_generic_alloc_resource(device_t bus, device_t child,
190 u_long start, u_long end,
191 u_long count, u_int flags);
192 struct resource_list *
193 bus_generic_get_resource_list (device_t, device_t);
195 int bus_generic_config_intr(device_t, int, enum intr_trigger,
197 int bus_generic_attach(device_t dev);
198 int bus_generic_child_present(device_t dev, device_t child);
199 int bus_generic_deactivate_resource(device_t dev, device_t child, int type,
200 int rid, struct resource *r);
201 int bus_generic_detach(device_t dev);
202 void bus_generic_driver_added(device_t dev, driver_t *driver);
203 int bus_print_child_header(device_t dev, device_t child);
204 int bus_print_child_footer(device_t dev, device_t child);
205 int bus_generic_print_child(device_t dev, device_t child);
206 int bus_generic_probe(device_t dev);
207 int bus_generic_read_ivar(device_t dev, device_t child, int which,
209 int bus_generic_release_resource(device_t bus, device_t child,
210 int type, int rid, struct resource *r);
211 int bus_generic_resume(device_t dev);
212 int bus_generic_setup_intr(device_t dev, device_t child,
213 struct resource *irq, int flags,
214 driver_intr_t *intr, void *arg, void **cookiep);
215 int bus_generic_shutdown(device_t dev);
216 int bus_generic_suspend(device_t dev);
217 int bus_generic_teardown_intr(device_t dev, device_t child,
218 struct resource *irq, void *cookie);
219 int bus_generic_write_ivar(device_t dev, device_t child, int which,
223 bus_generic_rl_alloc_resource (device_t, device_t, int, int *,
224 u_long, u_long, u_long, u_int);
225 void bus_generic_rl_delete_resource (device_t, device_t, int, int);
226 int bus_generic_rl_get_resource (device_t, device_t, int, int, u_long *,
228 int bus_generic_rl_set_resource (device_t, device_t, int, int, u_long,
230 int bus_generic_rl_release_resource (device_t, device_t, int, int,
234 * Wrapper functions for the BUS_*_RESOURCE methods to make client code
237 struct resource *bus_alloc_resource(device_t dev, int type, int *rid,
238 u_long start, u_long end, u_long count,
240 int bus_activate_resource(device_t dev, int type, int rid,
242 int bus_deactivate_resource(device_t dev, int type, int rid,
244 int bus_release_resource(device_t dev, int type, int rid,
246 int bus_setup_intr(device_t dev, struct resource *r, int flags,
247 driver_intr_t handler, void *arg, void **cookiep);
248 int bus_teardown_intr(device_t dev, struct resource *r, void *cookie);
249 int bus_set_resource(device_t dev, int type, int rid,
250 u_long start, u_long count);
251 int bus_get_resource(device_t dev, int type, int rid,
252 u_long *startp, u_long *countp);
253 u_long bus_get_resource_start(device_t dev, int type, int rid);
254 u_long bus_get_resource_count(device_t dev, int type, int rid);
255 void bus_delete_resource(device_t dev, int type, int rid);
258 * Access functions for device.
260 device_t device_add_child(device_t dev, const char *name, int unit);
261 device_t device_add_child_ordered(device_t dev, int order,
262 const char *name, int unit);
263 void device_busy(device_t dev);
264 int device_delete_child(device_t dev, device_t child);
265 int device_detach(device_t dev);
266 void device_disable(device_t dev);
267 void device_enable(device_t dev);
268 device_t device_find_child(device_t dev, const char *classname,
270 const char *device_get_desc(device_t dev);
271 devclass_t device_get_devclass(device_t dev);
272 driver_t *device_get_driver(device_t dev);
273 u_int32_t device_get_flags(device_t dev);
274 device_t device_get_parent(device_t dev);
275 int device_get_children(device_t dev, device_t **listp, int *countp);
276 void *device_get_ivars(device_t dev);
277 void device_set_ivars(device_t dev, void *ivars);
278 const char *device_get_name(device_t dev);
279 const char *device_get_nameunit(device_t dev);
280 void *device_get_softc(device_t dev);
281 device_state_t device_get_state(device_t dev);
282 int device_get_unit(device_t dev);
283 int device_is_alive(device_t dev); /* did probe succeed? */
284 int device_is_attached(device_t dev); /* did attach succeed? */
285 int device_is_enabled(device_t dev);
286 int device_is_quiet(device_t dev);
287 int device_print_prettyname(device_t dev);
288 int device_printf(device_t dev, const char *, ...) __printflike(2, 3);
289 int device_probe_and_attach(device_t dev);
290 void device_quiet(device_t dev);
291 void device_set_desc(device_t dev, const char* desc);
292 void device_set_desc_copy(device_t dev, const char* desc);
293 int device_set_devclass(device_t dev, const char *classname);
294 int device_set_driver(device_t dev, driver_t *driver);
295 void device_set_flags(device_t dev, u_int32_t flags);
296 void device_set_softc(device_t dev, void *softc);
297 int device_set_unit(device_t dev, int unit); /* XXX DONT USE XXX */
298 int device_shutdown(device_t dev);
299 void device_unbusy(device_t dev);
300 void device_verbose(device_t dev);
303 * Access functions for devclass.
305 int devclass_add_driver(devclass_t dc, driver_t *driver);
306 int devclass_delete_driver(devclass_t dc, driver_t *driver);
307 devclass_t devclass_create(const char *classname);
308 devclass_t devclass_find(const char *classname);
309 driver_t *devclass_find_driver(devclass_t dc, const char *classname);
310 const char *devclass_get_name(devclass_t dc);
311 device_t devclass_get_device(devclass_t dc, int unit);
312 void *devclass_get_softc(devclass_t dc, int unit);
313 int devclass_get_devices(devclass_t dc, device_t **listp, int *countp);
314 int devclass_get_maxunit(devclass_t dc);
317 * Access functions for device resources.
320 int resource_int_value(const char *name, int unit, const char *resname,
322 int resource_long_value(const char *name, int unit, const char *resname,
324 int resource_string_value(const char *name, int unit, const char *resname,
326 int resource_disabled(const char *name, int unit);
327 int resource_query_string(int i, const char *resname, const char *value);
328 char *resource_query_name(int i);
329 int resource_query_unit(int i);
330 int resource_locate(int i, const char *resname);
331 int resource_set_int(const char *name, int unit, const char *resname,
333 int resource_set_long(const char *name, int unit, const char *resname,
335 int resource_set_string(const char *name, int unit, const char *resname,
337 int resource_count(void);
340 * Shorthand for constructing method tables.
342 #define DEVMETHOD KOBJMETHOD
345 * Some common device interfaces.
347 #include "device_if.h"
352 int driver_module_handler(struct module *, int, void *);
355 * Module support for automatically adding drivers to busses.
357 struct driver_module_data {
358 int (*dmd_chainevh)(struct module *, int, void *);
360 const char *dmd_busname;
361 driver_t **dmd_drivers;
363 devclass_t *dmd_devclass;
366 #define DRIVER_MODULE(name, busname, driver, devclass, evh, arg) \
368 static driver_t *name##_##busname##_driver_list[] = { &driver }; \
369 static struct driver_module_data name##_##busname##_driver_mod = { \
372 name##_##busname##_driver_list, \
373 (sizeof name##_##busname##_driver_list) / \
374 (sizeof name##_##busname##_driver_list[0]), \
378 static moduledata_t name##_##busname##_mod = { \
379 #busname "/" #name, \
380 driver_module_handler, \
381 &name##_##busname##_driver_mod \
383 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
384 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
386 #define MULTI_DRIVER_MODULE(name, busname, drivers, devclass, evh, arg) \
388 static driver_t name##_##busname##_driver_list[] = drivers; \
389 static struct driver_module_data name##_##busname##_driver_mod = { \
392 name##_##busname##_driver_list, \
393 (sizeof name##_##busname##_driver_list) / \
394 (sizeof name##_##busname##_driver_list[0]), \
398 static moduledata_t name##_##busname##_mod = { \
399 #busname "/" #name, \
400 driver_module_handler, \
401 &name##_##busname##_driver_mod \
403 DECLARE_MODULE(name##_##busname, name##_##busname##_mod, \
404 SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
408 #endif /* !_SYS_BUS_H_ */