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)
211 if (acpi_disabled("wmi") ||
212 ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids) == NULL)
214 device_set_desc(dev, "ACPI-WMI mapping");
220 * Attach the device by:
221 * - Looking for the first ACPI EC device
222 * - Install the notify handler
223 * - Install the EC address space handler
224 * - Look for the _WDG node and read GUID information blocks
227 acpi_wmi_attach(device_t dev)
229 struct acpi_wmi_softc *sc;
233 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
234 sc = device_get_softc(dev);
237 ACPI_SERIAL_BEGIN(acpi_wmi);
239 sc->wmi_handle = acpi_get_handle(dev);
240 TAILQ_INIT(&sc->wmi_info_list);
241 /* XXX Only works with one EC, but nearly all systems only have one. */
242 if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0))
244 device_printf(dev, "cannot find EC device\n");
245 else if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle,
246 ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc))))
247 device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n",
248 AcpiFormatException(status));
249 else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler(
250 sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler,
252 device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n",
253 AcpiFormatException(status));
254 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
255 acpi_wmi_notify_handler);
256 } else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks(sc,
258 device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n",
259 AcpiFormatException(status));
260 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
261 acpi_wmi_notify_handler);
262 AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC,
263 acpi_wmi_ec_handler);
265 sc->wmistat_dev_t = make_dev(&wmistat_cdevsw, 0, UID_ROOT,
266 GID_WHEEL, 0644, "wmistat%d", device_get_unit(dev));
267 sc->wmistat_dev_t->si_drv1 = sc;
268 sc->wmistat_open_pid = 0;
269 sc->wmistat_bufptr = -1;
272 ACPI_SERIAL_END(acpi_wmi);
275 bus_generic_probe(dev);
276 ret = bus_generic_attach(dev);
283 * Detach the driver by:
284 * - Removing notification handler
285 * - Removing address space handler
286 * - Turning off event generation for all WExx event activated by
290 acpi_wmi_detach(device_t dev)
292 struct wmi_info *winfo, *tmp;
293 struct acpi_wmi_softc *sc;
296 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
297 sc = device_get_softc(dev);
298 ACPI_SERIAL_BEGIN(acpi_wmi);
300 if (sc->wmistat_open_pid != 0) {
303 AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY,
304 acpi_wmi_notify_handler);
305 AcpiRemoveAddressSpaceHandler(sc->wmi_handle,
306 ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler);
307 TAILQ_FOREACH_SAFE(winfo, &sc->wmi_info_list, wmi_list, tmp) {
308 if (winfo->event_handler)
309 acpi_wmi_toggle_we_event_generation(dev,
310 winfo, EVENT_GENERATION_OFF);
311 TAILQ_REMOVE(&sc->wmi_info_list, winfo, wmi_list);
312 free(winfo, M_ACPIWMI);
314 if (sc->wmistat_bufptr != -1) {
315 sbuf_delete(&sc->wmistat_sbuf);
316 sc->wmistat_bufptr = -1;
318 sc->wmistat_open_pid = 0;
319 destroy_dev(sc->wmistat_dev_t);
322 ACPI_SERIAL_END(acpi_wmi);
329 * Check if the given GUID string (human readable format
330 * AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP)
334 acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string)
336 struct acpi_wmi_softc *sc;
337 struct wmi_info *winfo;
340 sc = device_get_softc(dev);
341 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
342 ACPI_SERIAL_BEGIN(acpi_wmi);
343 winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string);
344 ret = (winfo == NULL)?0:winfo->ginfo.max_instance+1;
345 ACPI_SERIAL_END(acpi_wmi);
351 * Call a method "method_id" on the given GUID block
352 * write result into user provided output buffer
355 acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string,
356 UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out)
358 ACPI_OBJECT params[3];
359 ACPI_OBJECT_LIST input;
360 char method[5] = "WMxx";
361 struct wmi_info *winfo;
362 struct acpi_wmi_softc *sc;
365 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
367 sc = device_get_softc(dev);
368 ACPI_SERIAL_BEGIN(acpi_wmi);
369 if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
371 status = AE_NOT_FOUND;
372 else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
373 status = AE_BAD_DATA;
374 else if (instance > winfo->ginfo.max_instance)
375 status = AE_BAD_PARAMETER;
377 params[0].Type = ACPI_TYPE_INTEGER;
378 params[0].Integer.Value = instance;
379 params[1].Type = ACPI_TYPE_INTEGER;
380 params[1].Integer.Value = method_id;
381 input.Pointer = params;
385 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
386 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
387 params[2].Buffer.Length = in->Length;
388 params[2].Buffer.Pointer = in->Pointer;
391 method[2] = winfo->ginfo.oid[0];
392 method[3] = winfo->ginfo.oid[1];
393 status = AcpiEvaluateObject(sc->wmi_handle, method,
396 ACPI_SERIAL_END(acpi_wmi);
402 * Install a user provided event_handler on the given GUID
403 * provided *data will be passed on callback
404 * If there is already an existing event handler registered it will be silently
408 acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string,
409 ACPI_NOTIFY_HANDLER event_handler, void *data)
411 struct acpi_wmi_softc *sc = device_get_softc(dev);
412 struct wmi_info *winfo;
415 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
418 ACPI_SERIAL_BEGIN(acpi_wmi);
419 if (guid_string == NULL || event_handler == NULL)
420 status = AE_BAD_PARAMETER;
421 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
423 status = AE_NOT_EXIST;
424 else if (winfo->event_handler != NULL ||
425 (status = acpi_wmi_toggle_we_event_generation(dev, winfo,
426 EVENT_GENERATION_ON)) == AE_OK) {
427 winfo->event_handler = event_handler;
428 winfo->event_handler_user_data = data;
430 ACPI_SERIAL_END(acpi_wmi);
436 * Remove a previously installed event handler from the given GUID
437 * If there was none installed, this call is silently discarded and
441 acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string)
443 struct acpi_wmi_softc *sc = device_get_softc(dev);
444 struct wmi_info *winfo;
447 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
450 ACPI_SERIAL_BEGIN(acpi_wmi);
452 (winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
453 != NULL && winfo->event_handler) {
454 status = acpi_wmi_toggle_we_event_generation(dev, winfo,
455 EVENT_GENERATION_OFF);
456 winfo->event_handler = NULL;
457 winfo->event_handler_user_data = NULL;
459 ACPI_SERIAL_END(acpi_wmi);
465 * Get details on an event received through a callback registered
466 * through ACPI_WMI_REMOVE_EVENT_HANDLER into a user provided output buffer.
467 * (event_id equals "notify" passed in the callback)
470 acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out)
472 ACPI_OBJECT_LIST input;
473 ACPI_OBJECT params[1];
474 struct acpi_wmi_softc *sc;
475 struct wmi_info *winfo;
478 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
480 sc = device_get_softc(dev);
481 status = AE_NOT_FOUND;
482 ACPI_SERIAL_BEGIN(acpi_wmi);
483 params[0].Type = ACPI_TYPE_INTEGER;
484 params[0].Integer.Value = event_id;
485 input.Pointer = params;
487 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
488 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
489 ((UINT8) winfo->ginfo.oid[0] == event_id)) {
490 status = AcpiEvaluateObject(sc->wmi_handle, "_WED",
495 ACPI_SERIAL_END(acpi_wmi);
501 * Read a block of data from the given GUID (using WQxx (query))
502 * Will be returned in a user provided buffer (out).
503 * If the method is marked as expensive (ACPI_WMI_REGFLAG_EXPENSIVE)
504 * we will first call the WCxx control method to lock the node to
505 * lock the node for data collection and release it afterwards.
506 * (Failed WCxx calls are ignored to "support" broken implementations)
509 acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance,
512 char wc_method[5] = "WCxx";
513 char wq_method[5] = "WQxx";
514 ACPI_OBJECT_LIST wc_input;
515 ACPI_OBJECT_LIST wq_input;
516 ACPI_OBJECT wc_params[1];
517 ACPI_OBJECT wq_params[1];
518 ACPI_HANDLE wc_handle;
519 struct acpi_wmi_softc *sc;
520 struct wmi_info *winfo;
522 ACPI_STATUS wc_status;
524 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
526 sc = device_get_softc(dev);
527 wc_status = AE_ERROR;
528 ACPI_SERIAL_BEGIN(acpi_wmi);
529 if (guid_string == NULL || out == NULL)
530 status = AE_BAD_PARAMETER;
531 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
534 else if (instance > winfo->ginfo.max_instance)
535 status = AE_BAD_PARAMETER;
536 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
537 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
540 wq_params[0].Type = ACPI_TYPE_INTEGER;
541 wq_params[0].Integer.Value = instance;
542 wq_input.Pointer = wq_params;
544 if (winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) {
545 wc_params[0].Type = ACPI_TYPE_INTEGER;
546 wc_params[0].Integer.Value = 1;
547 wc_input.Pointer = wc_params;
549 wc_method[2] = winfo->ginfo.oid[0];
550 wc_method[3] = winfo->ginfo.oid[1];
551 wc_status = AcpiGetHandle(sc->wmi_handle, wc_method,
553 if (ACPI_SUCCESS(wc_status))
554 wc_status = AcpiEvaluateObject(wc_handle,
555 wc_method, &wc_input, NULL);
557 wq_method[2] = winfo->ginfo.oid[0];
558 wq_method[3] = winfo->ginfo.oid[1];
559 status = AcpiEvaluateObject(sc->wmi_handle, wq_method,
561 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE)
562 && ACPI_SUCCESS(wc_status)) {
563 wc_params[0].Integer.Value = 0;
564 status = AcpiEvaluateObject(wc_handle, wc_method,
565 &wc_input, NULL); /* XXX this might be
570 ACPI_SERIAL_END(acpi_wmi);
576 * Write a block of data to the given GUID (using WSxx)
579 acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance,
580 const ACPI_BUFFER *in)
582 char method[5] = "WSxx";
583 ACPI_OBJECT_LIST input;
584 ACPI_OBJECT params[2];
585 struct wmi_info *winfo;
586 struct acpi_wmi_softc *sc;
589 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
591 sc = device_get_softc(dev);
592 ACPI_SERIAL_BEGIN(acpi_wmi);
593 if (guid_string == NULL || in == NULL)
594 status = AE_BAD_DATA;
595 else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(sc, guid_string))
598 else if (instance > winfo->ginfo.max_instance)
599 status = AE_BAD_PARAMETER;
600 else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) ||
601 (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD))
604 params[0].Type = ACPI_TYPE_INTEGER;
605 params[0].Integer.Value = instance;
606 input.Pointer = params;
608 params[1].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING)
609 ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER;
610 params[1].Buffer.Length = in->Length;
611 params[1].Buffer.Pointer = in->Pointer;
612 method[2] = winfo->ginfo.oid[0];
613 method[3] = winfo->ginfo.oid[1];
614 status = AcpiEvaluateObject(sc->wmi_handle, method,
617 ACPI_SERIAL_END(acpi_wmi);
623 * Handle events received and dispatch them to
624 * stakeholders that registered through ACPI_WMI_INSTALL_EVENT_HANDLER
627 acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
629 struct acpi_wmi_softc *sc = context;
630 ACPI_NOTIFY_HANDLER handler;
632 struct wmi_info *winfo;
634 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
638 ACPI_SERIAL_BEGIN(acpi_wmi);
639 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
640 if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) &&
641 ((UINT8) winfo->ginfo.oid[0] == notify)) {
642 if (winfo->event_handler) {
643 handler = winfo->event_handler;
644 handler_data = winfo->event_handler_user_data;
649 ACPI_SERIAL_END(acpi_wmi);
651 handler(h, notify, handler_data);
656 * Handle EC address space notifications reveived on the WDG node
657 * (this mimics EcAddressSpaceHandler in acpi_ec.c)
660 acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address,
661 UINT32 width, UINT64 *value, void *context,
662 void *region_context)
664 struct acpi_wmi_softc *sc;
670 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)address);
672 sc = (struct acpi_wmi_softc *)context;
673 if (width % 8 != 0 || value == NULL || context == NULL)
674 return (AE_BAD_PARAMETER);
675 if (address + (width / 8) - 1 > 0xFF)
676 return (AE_BAD_ADDRESS);
677 if (function == ACPI_READ)
682 for (i = 0; i < width; i += 8, ++ec_addr) {
685 status = ACPI_EC_READ(sc->ec_dev, ec_addr, &ec_data, 1);
686 if (ACPI_SUCCESS(status))
687 *value |= ((UINT64)ec_data) << i;
690 ec_data = (UINT8)((*value) >> i);
691 status = ACPI_EC_WRITE(sc->ec_dev, ec_addr, ec_data, 1);
694 device_printf(sc->wmi_dev,
695 "invalid acpi_wmi_ec_handler function %d\n",
697 status = AE_BAD_PARAMETER;
700 if (ACPI_FAILURE(status))
708 * Read GUID blocks from the _WDG node
709 * into wmi_info_list.
712 acpi_wmi_read_wdg_blocks(struct acpi_wmi_softc *sc, ACPI_HANDLE h)
714 ACPI_BUFFER out = {ACPI_ALLOCATE_BUFFER, NULL};
715 struct guid_info *ginfo;
717 struct wmi_info *winfo;
719 UINT32 wdg_block_count;
722 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
724 ACPI_SERIAL_ASSERT(acpi_wmi);
725 if (ACPI_FAILURE(status = AcpiEvaluateObject(h, "_WDG", NULL, &out)))
727 obj = (ACPI_OBJECT*) out.Pointer;
728 wdg_block_count = obj->Buffer.Length / sizeof(struct guid_info);
729 if ((ginfo = malloc(obj->Buffer.Length, M_ACPIWMI, M_NOWAIT))
731 AcpiOsFree(out.Pointer);
732 return (AE_NO_MEMORY);
734 memcpy(ginfo, obj->Buffer.Pointer, obj->Buffer.Length);
735 for (i = 0; i < wdg_block_count; ++i) {
736 if ((winfo = malloc(sizeof(struct wmi_info), M_ACPIWMI,
737 M_NOWAIT | M_ZERO)) == NULL) {
738 AcpiOsFree(out.Pointer);
739 free(ginfo, M_ACPIWMI);
740 return (AE_NO_MEMORY);
742 winfo->ginfo = ginfo[i];
743 TAILQ_INSERT_TAIL(&sc->wmi_info_list, winfo, wmi_list);
745 AcpiOsFree(out.Pointer);
746 free(ginfo, M_ACPIWMI);
752 * Toggle event generation in for the given GUID (passed by winfo)
753 * Turn on to get notified (through acpi_wmi_notify_handler) if events happen
757 acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo,
758 enum event_generation_state state)
760 char method[5] = "WExx";
761 ACPI_OBJECT_LIST input;
762 ACPI_OBJECT params[1];
763 struct acpi_wmi_softc *sc;
766 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
768 sc = device_get_softc(dev);
769 ACPI_SERIAL_ASSERT(acpi_wmi);
770 params[0].Type = ACPI_TYPE_INTEGER;
771 params[0].Integer.Value = state==EVENT_GENERATION_ON?1:0;
772 input.Pointer = params;
775 UINT8 hi = ((UINT8) winfo->ginfo.oid[0]) >> 4;
776 UINT8 lo = ((UINT8) winfo->ginfo.oid[0]) & 0xf;
777 method[2] = (hi > 9 ? hi + 55: hi + 48);
778 method[3] = (lo > 9 ? lo + 55: lo + 48);
779 status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL);
780 if (status == AE_NOT_FOUND) status = AE_OK;
786 * Convert given two digit hex string (hexin) to an UINT8 referenced
788 * Return != 0 if the was a problem (invalid input)
790 static __inline int acpi_wmi_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
797 if ('0' <= hi && hi <= '9')
799 else if ('A' <= hi && hi <= 'F')
801 else if ('a' <= hi && hi <= 'f')
805 if ('0' <= lo && lo <= '9')
807 else if ('A' <= lo && lo <= 'F')
809 else if ('a' <= lo && lo <= 'f')
813 *byteout = (hi << 4) + lo;
819 * Convert a human readable 36 character GUID into a 16byte
820 * machine readable one.
821 * The basic algorithm looks as follows:
822 * Input: AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP
823 * Output: DCBAFEHGIJKLMNOP
824 * (AA BB CC etc. represent two digit hex numbers == bytes)
825 * Return != 0 if passed guid string is invalid
828 acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid)
830 static const int mapping[20] = {3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1,
831 8, 9, -1, 10, 11, 12, 13, 14, 15};
834 for (i = 0; i < 20; ++i, ++guid_string) {
835 if (mapping[i] >= 0) {
836 if (acpi_wmi_hex_to_int(guid_string,
840 } else if (*guid_string != '-')
848 * Lookup a wmi_info structure in wmi_list based on a
849 * human readable GUID
850 * Return NULL if the GUID is unknown in the _WDG
852 static struct wmi_info*
853 acpi_wmi_lookup_wmi_info_by_guid_string(struct acpi_wmi_softc *sc, const char *guid_string)
856 struct wmi_info *winfo;
858 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
860 ACPI_SERIAL_ASSERT(acpi_wmi);
862 if (!acpi_wmi_guid_string_to_guid(guid_string, guid)) {
863 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
864 if (!memcmp(winfo->ginfo.guid, guid, 16)) {
874 * open wmistat device
877 acpi_wmi_wmistat_open(struct cdev* dev, int flags, int mode, struct thread *td)
879 struct acpi_wmi_softc *sc;
882 if (dev == NULL || dev->si_drv1 == NULL)
886 ACPI_SERIAL_BEGIN(acpi_wmi);
887 if (sc->wmistat_open_pid != 0) {
891 if (sbuf_new(&sc->wmistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
895 sc->wmistat_open_pid = td->td_proc->p_pid;
896 sc->wmistat_bufptr = 0;
900 ACPI_SERIAL_END(acpi_wmi);
906 * close wmistat device
909 acpi_wmi_wmistat_close(struct cdev* dev, int flags, int mode,
912 struct acpi_wmi_softc *sc;
915 if (dev == NULL || dev->si_drv1 == NULL)
919 ACPI_SERIAL_BEGIN(acpi_wmi);
920 if (sc->wmistat_open_pid == 0) {
924 if (sc->wmistat_bufptr != -1) {
925 sbuf_delete(&sc->wmistat_sbuf);
926 sc->wmistat_bufptr = -1;
928 sc->wmistat_open_pid = 0;
931 ACPI_SERIAL_END(acpi_wmi);
937 * Read from wmistat guid information
940 acpi_wmi_wmistat_read(struct cdev *dev, struct uio *buf, int flag)
942 struct acpi_wmi_softc *sc;
943 struct wmi_info *winfo;
948 if (dev == NULL || dev->si_drv1 == NULL)
952 ACPI_SERIAL_BEGIN(acpi_wmi);
953 if (sc->wmistat_open_pid != buf->uio_td->td_proc->p_pid ||
954 sc->wmistat_bufptr == -1) {
958 if (!sbuf_done(&sc->wmistat_sbuf)) {
959 sbuf_printf(&sc->wmistat_sbuf, "GUID "
960 " INST EXPE METH STR "
962 TAILQ_FOREACH(winfo, &sc->wmi_info_list, wmi_list) {
963 guid = (UINT8*)winfo->ginfo.guid;
964 sbuf_printf(&sc->wmistat_sbuf,
965 "{%02X%02X%02X%02X-%02X%02X-"
966 "%02X%02X-%02X%02X-%02X%02X"
967 "%02X%02X%02X%02X} %3d %-5s",
968 guid[3], guid[2], guid[1], guid[0],
972 guid[10], guid[11], guid[12],
973 guid[13], guid[14], guid[15],
974 winfo->ginfo.max_instance,
976 ACPI_WMI_REGFLAG_EXPENSIVE)?
979 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_METHOD)
980 sbuf_printf(&sc->wmistat_sbuf,
983 winfo->ginfo.oid[1]);
985 sbuf_printf(&sc->wmistat_sbuf, "NO ");
986 sbuf_printf(&sc->wmistat_sbuf, "%-4s",
988 ACPI_WMI_REGFLAG_STRING)?"YES":"NO"
990 if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_EVENT)
991 sbuf_printf(&sc->wmistat_sbuf,
993 (UINT8)winfo->ginfo.oid[0],
994 winfo->event_handler==NULL?
997 sbuf_printf(&sc->wmistat_sbuf,
1000 winfo->ginfo.oid[1]);
1002 sbuf_finish(&sc->wmistat_sbuf);
1004 if (sbuf_len(&sc->wmistat_sbuf) <= 0) {
1005 sbuf_delete(&sc->wmistat_sbuf);
1006 sc->wmistat_bufptr = -1;
1007 sc->wmistat_open_pid = 0;
1010 l = min(buf->uio_resid, sbuf_len(&sc->wmistat_sbuf) -
1011 sc->wmistat_bufptr);
1012 ret = (l > 0)?uiomove(sbuf_data(&sc->wmistat_sbuf) +
1013 sc->wmistat_bufptr, l, buf) : 0;
1014 sc->wmistat_bufptr += l;
1017 ACPI_SERIAL_END(acpi_wmi);