2 * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Driver for acpi-wmi mapping, provides an interface for vendor specific
32 * implementations (e.g. HP and Acer laptops).
33 * Inspired by the ACPI-WMI mapping driver (c) 2008-2008 Carlos Corbacho which
34 * implements this functionality for Linux.
36 * WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
37 * acpi-wmi for Linux: http://www.kernel.org
41 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/malloc.h>
48 #include <sys/module.h>
51 #include <contrib/dev/acpica/include/acpi.h>
52 #include <contrib/dev/acpica/include/accommon.h>
53 #include <dev/acpica/acpivar.h>
54 #include "acpi_wmi_if.h"
56 static MALLOC_DEFINE(M_ACPIWMI, "acpiwmi", "ACPI-WMI mapping");
58 #define _COMPONENT ACPI_OEM
59 ACPI_MODULE_NAME("ACPI_WMI");
61 #define ACPI_WMI_REGFLAG_EXPENSIVE 0x1 /* GUID flag: Expensive operation */
62 #define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */
63 #define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */
64 #define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */
67 * acpi_wmi driver private structure
69 struct acpi_wmi_softc {
70 device_t wmi_dev; /* wmi device id */
71 ACPI_HANDLE wmi_handle; /* handle of the PNP0C14 node */
72 device_t ec_dev; /* acpi_ec0 */
73 struct cdev *wmistat_dev_t; /* wmistat device handle */
74 struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */
75 pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */
76 int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */
77 TAILQ_HEAD(wmi_info_list_head, wmi_info) wmi_info_list;
81 * Struct that holds information about
82 * about a single GUID entry in _WDG
85 char guid[16]; /* 16 byte non human readable GUID */
86 char oid[2]; /* object id or event notify id (first byte) */
87 UINT8 max_instance; /* highest instance known for this GUID */
88 UINT8 flags; /* ACPI_WMI_REGFLAG_%s */
91 /* WExx event generation state (on/off) */
92 enum event_generation_state {
93 EVENT_GENERATION_ON = 1,
94 EVENT_GENERATION_OFF = 0
99 * Information about one entry in _WDG.
100 * List of those is used to lookup information by GUID.
103 TAILQ_ENTRY(wmi_info) wmi_list;
104 struct guid_info ginfo; /* information on guid */
105 ACPI_NOTIFY_HANDLER event_handler;/* client provided event handler */
106 void *event_handler_user_data; /* ev handler cookie */
110 ACPI_SERIAL_DECL(acpi_wmi, "ACPI-WMI Mapping");
112 /* public interface - declaration */
113 /* standard device interface*/
114 static int acpi_wmi_probe(device_t dev);
115 static int acpi_wmi_attach(device_t dev);
116 static int acpi_wmi_detach(device_t dev);
117 /* see acpi_wmi_if.m */
118 static int acpi_wmi_provides_guid_string_method(device_t dev,
119 const char *guid_string);
120 static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev,
121 const char *guid_string, UINT8 instance,
122 UINT32 method_id, const ACPI_BUFFER *in,
124 static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev,
125 const char *guid_string, ACPI_NOTIFY_HANDLER handler,
127 static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev,
128 const char *guid_string);
129 static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev,
130 UINT32 event_id, ACPI_BUFFER *out);
131 static ACPI_STATUS acpi_wmi_get_block_method(device_t dev,
132 const char *guid_string,
133 UINT8 instance, ACPI_BUFFER *out);
134 static ACPI_STATUS acpi_wmi_set_block_method(device_t dev,
135 const char *guid_string,
136 UINT8 instance, const ACPI_BUFFER *in);
137 /* private interface - declaration */
139 static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify,
141 static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function,
142 ACPI_PHYSICAL_ADDRESS address, UINT32 width,
143 UINT64 *value, void *context,
144 void *region_context);
146 static ACPI_STATUS acpi_wmi_read_wdg_blocks(struct acpi_wmi_softc *sc, ACPI_HANDLE h);
147 static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev,
148 struct wmi_info *winfo,
149 enum event_generation_state state);
150 static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string,
152 static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string(struct acpi_wmi_softc *sc,
153 const char *guid_string);
155 static d_open_t acpi_wmi_wmistat_open;
156 static d_close_t acpi_wmi_wmistat_close;
157 static d_read_t acpi_wmi_wmistat_read;
159 /* handler /dev/wmistat device */
160 static struct cdevsw wmistat_cdevsw = {
161 .d_version = D_VERSION,
162 .d_open = acpi_wmi_wmistat_open,
163 .d_close = acpi_wmi_wmistat_close,
164 .d_read = acpi_wmi_wmistat_read,
169 static device_method_t acpi_wmi_methods[] = {
170 /* Device interface */
171 DEVMETHOD(device_probe, acpi_wmi_probe),
172 DEVMETHOD(device_attach, acpi_wmi_attach),
173 DEVMETHOD(device_detach, acpi_wmi_detach),
176 DEVMETHOD(bus_add_child, bus_generic_add_child),
178 /* acpi_wmi interface */
179 DEVMETHOD(acpi_wmi_provides_guid_string,
180 acpi_wmi_provides_guid_string_method),
181 DEVMETHOD(acpi_wmi_evaluate_call, acpi_wmi_evaluate_call_method),
182 DEVMETHOD(acpi_wmi_install_event_handler,
183 acpi_wmi_install_event_handler_method),
184 DEVMETHOD(acpi_wmi_remove_event_handler,
185 acpi_wmi_remove_event_handler_method),
186 DEVMETHOD(acpi_wmi_get_event_data, acpi_wmi_get_event_data_method),
187 DEVMETHOD(acpi_wmi_get_block, acpi_wmi_get_block_method),
188 DEVMETHOD(acpi_wmi_set_block, acpi_wmi_set_block_method),
193 static driver_t acpi_wmi_driver = {
196 sizeof(struct acpi_wmi_softc),
199 static devclass_t acpi_wmi_devclass;
200 DRIVER_MODULE(acpi_wmi, acpi, acpi_wmi_driver, acpi_wmi_devclass, 0, 0);
201 MODULE_VERSION(acpi_wmi, 1);
202 MODULE_DEPEND(acpi_wmi, acpi, 1, 1, 1);
203 static char *wmi_ids[] = {"PNP0C14", NULL};
206 * Probe for the PNP0C14 ACPI node
209 acpi_wmi_probe(device_t dev)
213 if (acpi_disabled("wmi"))
215 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids, NULL);
217 device_set_desc(dev, "ACPI-WMI mapping");
223 * Attach the device by:
224 * - Looking for the first ACPI EC device
225 * - Install the notify handler
226 * - Install the EC address space handler
227 * - Look for the _WDG node and read GUID information blocks
230 acpi_wmi_attach(device_t dev)
232 struct acpi_wmi_softc *sc;
236 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
237 sc = device_get_softc(dev);
240 ACPI_SERIAL_BEGIN(acpi_wmi);
242 sc->wmi_handle = acpi_get_handle(dev);
243 TAILQ_INIT(&sc->wmi_info_list);
244 /* XXX Only works with one EC, but nearly all systems only have one. */
245 if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0))
247 device_printf(dev, "cannot find EC device\n");
248 else if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle,
249 ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc))))
250 device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n",
251 AcpiFormatException(status));
252 else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler(
253 sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler,
255 device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n",
256 AcpiFormatException(status));
257 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
258 acpi_wmi_notify_handler);
259 } else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks(sc,
261 device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n",
262 AcpiFormatException(status));
263 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
264 acpi_wmi_notify_handler);
265 AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC,
266 acpi_wmi_ec_handler);
268 sc->wmistat_dev_t = make_dev(&wmistat_cdevsw, 0, UID_ROOT,
269 GID_WHEEL, 0644, "wmistat%d", device_get_unit(dev));
270 sc->wmistat_dev_t->si_drv1 = sc;
271 sc->wmistat_open_pid = 0;
272 sc->wmistat_bufptr = -1;
275 ACPI_SERIAL_END(acpi_wmi);
278 bus_generic_probe(dev);
279 ret = bus_generic_attach(dev);
286 * Detach the driver by:
287 * - Removing notification handler
288 * - Removing address space handler
289 * - Turning off event generation for all WExx event activated by
293 acpi_wmi_detach(device_t dev)
295 struct wmi_info *winfo, *tmp;
296 struct acpi_wmi_softc *sc;
299 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
300 sc = device_get_softc(dev);
301 ACPI_SERIAL_BEGIN(acpi_wmi);
303 if (sc->wmistat_open_pid != 0) {
306 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
307 acpi_wmi_notify_handler);
308 AcpiRemoveAddressSpaceHandler(sc->wmi_handle,
309 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler);
310 TAILQ_FOREACH_SAFE(winfo, &sc->wmi_info_list, wmi_list, tmp) {
311 if (winfo->event_handler)
312 acpi_wmi_toggle_we_event_generation(dev,
313 winfo, EVENT_GENERATION_OFF);
314 TAILQ_REMOVE(&sc->wmi_info_list, winfo, wmi_list);
315 free(winfo, M_ACPIWMI);
317 if (sc->wmistat_bufptr != -1) {
318 sbuf_delete(&sc->wmistat_sbuf);
319 sc->wmistat_bufptr = -1;
321 sc->wmistat_open_pid = 0;
322 destroy_dev(sc->wmistat_dev_t);
325 ACPI_SERIAL_END(acpi_wmi);
332 * Check if the given GUID string (human readable format
333 * AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP)
337 acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string)
339 struct acpi_wmi_softc *sc;
340 struct wmi_info *winfo;
343 sc = device_get_softc(dev);
344 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
345 ACPI_SERIAL_BEGIN(acpi_wmi);
346 winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string);
347 ret = (winfo == NULL)?0:winfo->ginfo.max_instance+1;
348 ACPI_SERIAL_END(acpi_wmi);
354 * Call a method "method_id" on the given GUID block
355 * write result into user provided output buffer
358 acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string,
359 UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out)
361 ACPI_OBJECT params[3];
362 ACPI_OBJECT_LIST input;
363 char method[5] = "WMxx";
364 struct wmi_info *winfo;
365 struct acpi_wmi_softc *sc;
368 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
370 sc = device_get_softc(dev);
371 ACPI_SERIAL_BEGIN(acpi_wmi);
372 if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
374 status = AE_NOT_FOUND;
375 else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
376 status = AE_BAD_DATA;
377 else if (instance > winfo->ginfo.max_instance)
378 status = AE_BAD_PARAMETER;
380 params[0].Type = ACPI_TYPE_INTEGER;
381 params[0].Integer.Value = instance;
382 params[1].Type = ACPI_TYPE_INTEGER;
383 params[1].Integer.Value = method_id;
384 input.Pointer = params;
388 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
389 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
390 params[2].Buffer.Length = in->Length;
391 params[2].Buffer.Pointer = in->Pointer;
394 method[2] = winfo->ginfo.oid[0];
395 method[3] = winfo->ginfo.oid[1];
396 status = AcpiEvaluateObject(sc->wmi_handle, method,
399 ACPI_SERIAL_END(acpi_wmi);
405 * Install a user provided event_handler on the given GUID
406 * provided *data will be passed on callback
407 * If there is already an existing event handler registered it will be silently
411 acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string,
412 ACPI_NOTIFY_HANDLER event_handler, void *data)
414 struct acpi_wmi_softc *sc = device_get_softc(dev);
415 struct wmi_info *winfo;
418 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
421 ACPI_SERIAL_BEGIN(acpi_wmi);
422 if (guid_string == NULL || event_handler == NULL)
423 status = AE_BAD_PARAMETER;
424 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
426 status = AE_NOT_EXIST;
427 else if (winfo->event_handler != NULL ||
428 (status = acpi_wmi_toggle_we_event_generation(dev, winfo,
429 EVENT_GENERATION_ON)) == AE_OK) {
430 winfo->event_handler = event_handler;
431 winfo->event_handler_user_data = data;
433 ACPI_SERIAL_END(acpi_wmi);
439 * Remove a previously installed event handler from the given GUID
440 * If there was none installed, this call is silently discarded and
444 acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string)
446 struct acpi_wmi_softc *sc = device_get_softc(dev);
447 struct wmi_info *winfo;
450 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
453 ACPI_SERIAL_BEGIN(acpi_wmi);
455 (winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
456 != NULL && winfo->event_handler) {
457 status = acpi_wmi_toggle_we_event_generation(dev, winfo,
458 EVENT_GENERATION_OFF);
459 winfo->event_handler = NULL;
460 winfo->event_handler_user_data = NULL;
462 ACPI_SERIAL_END(acpi_wmi);
468 * Get details on an event received through a callback registered
469 * through ACPI_WMI_REMOVE_EVENT_HANDLER into a user provided output buffer.
470 * (event_id equals "notify" passed in the callback)
473 acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out)
475 ACPI_OBJECT_LIST input;
476 ACPI_OBJECT params[1];
477 struct acpi_wmi_softc *sc;
478 struct wmi_info *winfo;
481 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
483 sc = device_get_softc(dev);
484 status = AE_NOT_FOUND;
485 ACPI_SERIAL_BEGIN(acpi_wmi);
486 params[0].Type = ACPI_TYPE_INTEGER;
487 params[0].Integer.Value = event_id;
488 input.Pointer = params;
490 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
491 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
492 ((UINT8) winfo->ginfo.oid[0] == event_id)) {
493 status = AcpiEvaluateObject(sc->wmi_handle, "_WED",
498 ACPI_SERIAL_END(acpi_wmi);
504 * Read a block of data from the given GUID (using WQxx (query))
505 * Will be returned in a user provided buffer (out).
506 * If the method is marked as expensive (ACPI_WMI_REGFLAG_EXPENSIVE)
507 * we will first call the WCxx control method to lock the node to
508 * lock the node for data collection and release it afterwards.
509 * (Failed WCxx calls are ignored to "support" broken implementations)
512 acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance,
515 char wc_method[5] = "WCxx";
516 char wq_method[5] = "WQxx";
517 ACPI_OBJECT_LIST wc_input;
518 ACPI_OBJECT_LIST wq_input;
519 ACPI_OBJECT wc_params[1];
520 ACPI_OBJECT wq_params[1];
521 ACPI_HANDLE wc_handle;
522 struct acpi_wmi_softc *sc;
523 struct wmi_info *winfo;
525 ACPI_STATUS wc_status;
527 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
529 sc = device_get_softc(dev);
530 wc_status = AE_ERROR;
531 ACPI_SERIAL_BEGIN(acpi_wmi);
532 if (guid_string == NULL || out == NULL)
533 status = AE_BAD_PARAMETER;
534 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
537 else if (instance > winfo->ginfo.max_instance)
538 status = AE_BAD_PARAMETER;
539 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
540 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
543 wq_params[0].Type = ACPI_TYPE_INTEGER;
544 wq_params[0].Integer.Value = instance;
545 wq_input.Pointer = wq_params;
547 if (winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) {
548 wc_params[0].Type = ACPI_TYPE_INTEGER;
549 wc_params[0].Integer.Value = 1;
550 wc_input.Pointer = wc_params;
552 wc_method[2] = winfo->ginfo.oid[0];
553 wc_method[3] = winfo->ginfo.oid[1];
554 wc_status = AcpiGetHandle(sc->wmi_handle, wc_method,
556 if (ACPI_SUCCESS(wc_status))
557 wc_status = AcpiEvaluateObject(wc_handle,
558 wc_method, &wc_input, NULL);
560 wq_method[2] = winfo->ginfo.oid[0];
561 wq_method[3] = winfo->ginfo.oid[1];
562 status = AcpiEvaluateObject(sc->wmi_handle, wq_method,
564 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE)
565 && ACPI_SUCCESS(wc_status)) {
566 wc_params[0].Integer.Value = 0;
567 status = AcpiEvaluateObject(wc_handle, wc_method,
568 &wc_input, NULL); /* XXX this might be
573 ACPI_SERIAL_END(acpi_wmi);
579 * Write a block of data to the given GUID (using WSxx)
582 acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance,
583 const ACPI_BUFFER *in)
585 char method[5] = "WSxx";
586 ACPI_OBJECT_LIST input;
587 ACPI_OBJECT params[2];
588 struct wmi_info *winfo;
589 struct acpi_wmi_softc *sc;
592 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
594 sc = device_get_softc(dev);
595 ACPI_SERIAL_BEGIN(acpi_wmi);
596 if (guid_string == NULL || in == NULL)
597 status = AE_BAD_DATA;
598 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
601 else if (instance > winfo->ginfo.max_instance)
602 status = AE_BAD_PARAMETER;
603 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
604 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
607 params[0].Type = ACPI_TYPE_INTEGER;
608 params[0].Integer.Value = instance;
609 input.Pointer = params;
611 params[1].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
612 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
613 params[1].Buffer.Length = in->Length;
614 params[1].Buffer.Pointer = in->Pointer;
615 method[2] = winfo->ginfo.oid[0];
616 method[3] = winfo->ginfo.oid[1];
617 status = AcpiEvaluateObject(sc->wmi_handle, method,
620 ACPI_SERIAL_END(acpi_wmi);
626 * Handle events received and dispatch them to
627 * stakeholders that registered through ACPI_WMI_INSTALL_EVENT_HANDLER
630 acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
632 struct acpi_wmi_softc *sc = context;
633 ACPI_NOTIFY_HANDLER handler;
635 struct wmi_info *winfo;
637 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
641 ACPI_SERIAL_BEGIN(acpi_wmi);
642 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
643 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
644 ((UINT8) winfo->ginfo.oid[0] == notify)) {
645 if (winfo->event_handler) {
646 handler = winfo->event_handler;
647 handler_data = winfo->event_handler_user_data;
652 ACPI_SERIAL_END(acpi_wmi);
654 handler(h, notify, handler_data);
659 * Handle EC address space notifications reveived on the WDG node
660 * (this mimics EcAddressSpaceHandler in acpi_ec.c)
663 acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address,
664 UINT32 width, UINT64 *value, void *context,
665 void *region_context)
667 struct acpi_wmi_softc *sc;
673 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)address);
675 sc = (struct acpi_wmi_softc *)context;
676 if (width % 8 != 0 || value == NULL || context == NULL)
677 return (AE_BAD_PARAMETER);
678 if (address + (width / 8) - 1 > 0xFF)
679 return (AE_BAD_ADDRESS);
680 if (function == ACPI_READ)
685 for (i = 0; i < width; i += 8, ++ec_addr) {
688 status = ACPI_EC_READ(sc->ec_dev, ec_addr, &ec_data, 1);
689 if (ACPI_SUCCESS(status))
690 *value |= ((UINT64)ec_data) << i;
693 ec_data = (UINT8)((*value) >> i);
694 status = ACPI_EC_WRITE(sc->ec_dev, ec_addr, ec_data, 1);
697 device_printf(sc->wmi_dev,
698 "invalid acpi_wmi_ec_handler function %d\n",
700 status = AE_BAD_PARAMETER;
703 if (ACPI_FAILURE(status))
711 * Read GUID blocks from the _WDG node
712 * into wmi_info_list.
715 acpi_wmi_read_wdg_blocks(struct acpi_wmi_softc *sc, ACPI_HANDLE h)
717 ACPI_BUFFER out = {ACPI_ALLOCATE_BUFFER, NULL};
718 struct guid_info *ginfo;
720 struct wmi_info *winfo;
722 UINT32 wdg_block_count;
725 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
727 ACPI_SERIAL_ASSERT(acpi_wmi);
728 if (ACPI_FAILURE(status = AcpiEvaluateObject(h, "_WDG", NULL, &out)))
730 obj = (ACPI_OBJECT*) out.Pointer;
731 wdg_block_count = obj->Buffer.Length / sizeof(struct guid_info);
732 if ((ginfo = malloc(obj->Buffer.Length, M_ACPIWMI, M_NOWAIT))
734 AcpiOsFree(out.Pointer);
735 return (AE_NO_MEMORY);
737 memcpy(ginfo, obj->Buffer.Pointer, obj->Buffer.Length);
738 for (i = 0; i < wdg_block_count; ++i) {
739 if ((winfo = malloc(sizeof(struct wmi_info), M_ACPIWMI,
740 M_NOWAIT | M_ZERO)) == NULL) {
741 AcpiOsFree(out.Pointer);
742 free(ginfo, M_ACPIWMI);
743 return (AE_NO_MEMORY);
745 winfo->ginfo = ginfo[i];
746 TAILQ_INSERT_TAIL(&sc->wmi_info_list, winfo, wmi_list);
748 AcpiOsFree(out.Pointer);
749 free(ginfo, M_ACPIWMI);
755 * Toggle event generation in for the given GUID (passed by winfo)
756 * Turn on to get notified (through acpi_wmi_notify_handler) if events happen
760 acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo,
761 enum event_generation_state state)
763 char method[5] = "WExx";
764 ACPI_OBJECT_LIST input;
765 ACPI_OBJECT params[1];
766 struct acpi_wmi_softc *sc;
769 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
771 sc = device_get_softc(dev);
772 ACPI_SERIAL_ASSERT(acpi_wmi);
773 params[0].Type = ACPI_TYPE_INTEGER;
774 params[0].Integer.Value = state==EVENT_GENERATION_ON?1:0;
775 input.Pointer = params;
778 UINT8 hi = ((UINT8) winfo->ginfo.oid[0]) >> 4;
779 UINT8 lo = ((UINT8) winfo->ginfo.oid[0]) & 0xf;
780 method[2] = (hi > 9 ? hi + 55: hi + 48);
781 method[3] = (lo > 9 ? lo + 55: lo + 48);
782 status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL);
783 if (status == AE_NOT_FOUND) status = AE_OK;
789 * Convert given two digit hex string (hexin) to an UINT8 referenced
791 * Return != 0 if the was a problem (invalid input)
793 static __inline int acpi_wmi_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
800 if ('0' <= hi && hi <= '9')
802 else if ('A' <= hi && hi <= 'F')
804 else if ('a' <= hi && hi <= 'f')
808 if ('0' <= lo && lo <= '9')
810 else if ('A' <= lo && lo <= 'F')
812 else if ('a' <= lo && lo <= 'f')
816 *byteout = (hi << 4) + lo;
822 * Convert a human readable 36 character GUID into a 16byte
823 * machine readable one.
824 * The basic algorithm looks as follows:
825 * Input: AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP
826 * Output: DCBAFEHGIJKLMNOP
827 * (AA BB CC etc. represent two digit hex numbers == bytes)
828 * Return != 0 if passed guid string is invalid
831 acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid)
833 static const int mapping[20] = {3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1,
834 8, 9, -1, 10, 11, 12, 13, 14, 15};
837 for (i = 0; i < 20; ++i, ++guid_string) {
838 if (mapping[i] >= 0) {
839 if (acpi_wmi_hex_to_int(guid_string,
843 } else if (*guid_string != '-')
851 * Lookup a wmi_info structure in wmi_list based on a
852 * human readable GUID
853 * Return NULL if the GUID is unknown in the _WDG
855 static struct wmi_info*
856 acpi_wmi_lookup_wmi_info_by_guid_string(struct acpi_wmi_softc *sc, const char *guid_string)
859 struct wmi_info *winfo;
861 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
863 ACPI_SERIAL_ASSERT(acpi_wmi);
865 if (!acpi_wmi_guid_string_to_guid(guid_string, guid)) {
866 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
867 if (!memcmp(winfo->ginfo.guid, guid, 16)) {
877 * open wmistat device
880 acpi_wmi_wmistat_open(struct cdev* dev, int flags, int mode, struct thread *td)
882 struct acpi_wmi_softc *sc;
885 if (dev == NULL || dev->si_drv1 == NULL)
889 ACPI_SERIAL_BEGIN(acpi_wmi);
890 if (sc->wmistat_open_pid != 0) {
894 if (sbuf_new(&sc->wmistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
898 sc->wmistat_open_pid = td->td_proc->p_pid;
899 sc->wmistat_bufptr = 0;
903 ACPI_SERIAL_END(acpi_wmi);
909 * close wmistat device
912 acpi_wmi_wmistat_close(struct cdev* dev, int flags, int mode,
915 struct acpi_wmi_softc *sc;
918 if (dev == NULL || dev->si_drv1 == NULL)
922 ACPI_SERIAL_BEGIN(acpi_wmi);
923 if (sc->wmistat_open_pid == 0) {
927 if (sc->wmistat_bufptr != -1) {
928 sbuf_delete(&sc->wmistat_sbuf);
929 sc->wmistat_bufptr = -1;
931 sc->wmistat_open_pid = 0;
934 ACPI_SERIAL_END(acpi_wmi);
940 * Read from wmistat guid information
943 acpi_wmi_wmistat_read(struct cdev *dev, struct uio *buf, int flag)
945 struct acpi_wmi_softc *sc;
946 struct wmi_info *winfo;
951 if (dev == NULL || dev->si_drv1 == NULL)
955 ACPI_SERIAL_BEGIN(acpi_wmi);
956 if (sc->wmistat_open_pid != buf->uio_td->td_proc->p_pid ||
957 sc->wmistat_bufptr == -1) {
961 if (!sbuf_done(&sc->wmistat_sbuf)) {
962 sbuf_printf(&sc->wmistat_sbuf, "GUID "
963 " INST EXPE METH STR "
965 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
966 guid = (UINT8*)winfo->ginfo.guid;
967 sbuf_printf(&sc->wmistat_sbuf,
968 "{%02X%02X%02X%02X-%02X%02X-"
969 "%02X%02X-%02X%02X-%02X%02X"
970 "%02X%02X%02X%02X} %3d %-5s",
971 guid[3], guid[2], guid[1], guid[0],
975 guid[10], guid[11], guid[12],
976 guid[13], guid[14], guid[15],
977 winfo->ginfo.max_instance,
979 ACPI_WMI_REGFLAG_EXPENSIVE)?
982 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_METHOD)
983 sbuf_printf(&sc->wmistat_sbuf,
986 winfo->ginfo.oid[1]);
988 sbuf_printf(&sc->wmistat_sbuf, "NO ");
989 sbuf_printf(&sc->wmistat_sbuf, "%-4s",
991 ACPI_WMI_REGFLAG_STRING)?"YES":"NO"
993 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_EVENT)
994 sbuf_printf(&sc->wmistat_sbuf,
996 (UINT8)winfo->ginfo.oid[0],
997 winfo->event_handler==NULL?
1000 sbuf_printf(&sc->wmistat_sbuf,
1002 winfo->ginfo.oid[0],
1003 winfo->ginfo.oid[1]);
1005 sbuf_finish(&sc->wmistat_sbuf);
1007 if (sbuf_len(&sc->wmistat_sbuf) <= 0) {
1008 sbuf_delete(&sc->wmistat_sbuf);
1009 sc->wmistat_bufptr = -1;
1010 sc->wmistat_open_pid = 0;
1013 l = min(buf->uio_resid, sbuf_len(&sc->wmistat_sbuf) -
1014 sc->wmistat_bufptr);
1015 ret = (l > 0)?uiomove(sbuf_data(&sc->wmistat_sbuf) +
1016 sc->wmistat_bufptr, l, buf) : 0;
1017 sc->wmistat_bufptr += l;
1020 ACPI_SERIAL_END(acpi_wmi);