2 * Copyright (c) 2003 Nate Lawson
3 * Copyright (c) 2000 Michael Smith
4 * Copyright (c) 2000 BSDi
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 ******************************************************************************
33 * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
38 * 2.1. This is your license from Intel Corp. under its intellectual property
39 * rights. You may have additional license terms from the party that provided
40 * you this software, covering your right to use that party's intellectual
43 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
44 * copy of the source code appearing in this file ("Covered Code") an
45 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
46 * base code distributed originally by Intel ("Original Intel Code") to copy,
47 * make derivatives, distribute, use and display any portion of the Covered
48 * Code in any form, with the right to sublicense such rights; and
50 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
51 * license (with the right to sublicense), under only those claims of Intel
52 * patents that are infringed by the Original Intel Code, to make, use, sell,
53 * offer to sell, and import the Covered Code and derivative works thereof
54 * solely to the minimum extent necessary to exercise the above copyright
55 * license, and in no event shall the patent license extend to any additions
56 * to or modifications of the Original Intel Code. No other license or right
57 * is granted directly or by implication, estoppel or otherwise;
59 * The above copyright and patent license is granted only if the following
64 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
65 * Redistribution of source code of any substantial portion of the Covered
66 * Code or modification with rights to further distribute source must include
67 * the above Copyright Notice, the above License, this list of Conditions,
68 * and the following Disclaimer and Export Compliance provision. In addition,
69 * Licensee must cause all Covered Code to which Licensee contributes to
70 * contain a file documenting the changes Licensee made to create that Covered
71 * Code and the date of any change. Licensee must include in that file the
72 * documentation of any changes made by any predecessor Licensee. Licensee
73 * must include a prominent statement that the modification is derived,
74 * directly or indirectly, from Original Intel Code.
76 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
77 * Redistribution of source code of any substantial portion of the Covered
78 * Code or modification without rights to further distribute source must
79 * include the following Disclaimer and Export Compliance provision in the
80 * documentation and/or other materials provided with distribution. In
81 * addition, Licensee may not authorize further sublicense of source of any
82 * portion of the Covered Code, and must include terms to the effect that the
83 * license from Licensee to its licensee is limited to the intellectual
84 * property embodied in the software Licensee provides to its licensee, and
85 * not to intellectual property embodied in modifications its licensee may
88 * 3.3. Redistribution of Executable. Redistribution in executable form of any
89 * substantial portion of the Covered Code or modification must reproduce the
90 * above Copyright Notice, and the following Disclaimer and Export Compliance
91 * provision in the documentation and/or other materials provided with the
94 * 3.4. Intel retains all right, title, and interest in and to the Original
97 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
98 * Intel shall be used in advertising or otherwise to promote the sale, use or
99 * other dealings in products derived from or relating to the Covered Code
100 * without prior written authorization from Intel.
102 * 4. Disclaimer and Export Compliance
104 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
105 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
106 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
107 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
108 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
109 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
110 * PARTICULAR PURPOSE.
112 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
113 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
114 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
115 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
116 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
117 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
118 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
121 * 4.3. Licensee shall not export, either directly or indirectly, any of this
122 * software or system incorporating such software without first obtaining any
123 * required license or other approval from the U. S. Department of Commerce or
124 * any other agency or department of the United States Government. In the
125 * event Licensee exports any such software from the United States or
126 * re-exports any such software from a foreign destination, Licensee shall
127 * ensure that the distribution and export/re-export of the software is in
128 * compliance with all laws, regulations, orders, or other restrictions of the
129 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
130 * any of its subsidiaries will export/re-export any technical data, process,
131 * software, or service, directly or indirectly, to any country for which the
132 * United States government or any agency thereof requires an export license,
133 * other governmental approval, or letter of assurance, without first obtaining
134 * such license, approval or letter.
136 *****************************************************************************/
138 #include <sys/cdefs.h>
139 __FBSDID("$FreeBSD$");
141 #include "opt_acpi.h"
142 #include <sys/param.h>
143 #include <sys/kernel.h>
145 #include <sys/lock.h>
146 #include <sys/malloc.h>
147 #include <sys/module.h>
150 #include <machine/bus.h>
151 #include <machine/resource.h>
152 #include <sys/rman.h>
154 #include <contrib/dev/acpica/acpi.h>
155 #include <dev/acpica/acpivar.h>
157 /* Hooks for the ACPI CA debugging infrastructure */
158 #define _COMPONENT ACPI_EC
159 ACPI_MODULE_NAME("EC")
165 typedef UINT8 EC_COMMAND;
167 #define EC_COMMAND_UNKNOWN ((EC_COMMAND) 0x00)
168 #define EC_COMMAND_READ ((EC_COMMAND) 0x80)
169 #define EC_COMMAND_WRITE ((EC_COMMAND) 0x81)
170 #define EC_COMMAND_BURST_ENABLE ((EC_COMMAND) 0x82)
171 #define EC_COMMAND_BURST_DISABLE ((EC_COMMAND) 0x83)
172 #define EC_COMMAND_QUERY ((EC_COMMAND) 0x84)
177 * The encoding of the EC status register is illustrated below.
178 * Note that a set bit (1) indicates the property is TRUE
179 * (e.g. if bit 0 is set then the output buffer is full).
184 * | | | | | | | +- Output Buffer Full?
185 * | | | | | | +--- Input Buffer Full?
186 * | | | | | +----- <reserved>
187 * | | | | +------- Data Register is Command Byte?
188 * | | | +--------- Burst Mode Enabled?
189 * | | +----------- SCI Event?
190 * | +------------- SMI Event?
191 * +--------------- <reserved>
194 typedef UINT8 EC_STATUS;
196 #define EC_FLAG_OUTPUT_BUFFER ((EC_STATUS) 0x01)
197 #define EC_FLAG_INPUT_BUFFER ((EC_STATUS) 0x02)
198 #define EC_FLAG_DATA_IS_CMD ((EC_STATUS) 0x08)
199 #define EC_FLAG_BURST_MODE ((EC_STATUS) 0x10)
205 typedef UINT8 EC_EVENT;
207 #define EC_EVENT_UNKNOWN ((EC_EVENT) 0x00)
208 #define EC_EVENT_OUTPUT_BUFFER_FULL ((EC_EVENT) 0x01)
209 #define EC_EVENT_INPUT_BUFFER_EMPTY ((EC_EVENT) 0x02)
210 #define EC_EVENT_SCI ((EC_EVENT) 0x20)
211 #define EC_EVENT_SMI ((EC_EVENT) 0x40)
213 /* Data byte returned after burst enable indicating it was successful. */
214 #define EC_BURST_ACK 0x90
217 * Register access primitives
219 #define EC_GET_DATA(sc) \
220 bus_space_read_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0)
222 #define EC_SET_DATA(sc, v) \
223 bus_space_write_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0, (v))
225 #define EC_GET_CSR(sc) \
226 bus_space_read_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0)
228 #define EC_SET_CSR(sc, v) \
229 bus_space_write_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0, (v))
231 /* Additional params to pass from the probe routine */
232 struct acpi_ec_params {
235 ACPI_HANDLE gpe_handle;
239 /* Indicate that this device has already been probed via ECDT. */
240 #define DEV_ECDT(x) (acpi_get_magic(x) == (int)&acpi_ec_devclass)
245 struct acpi_ec_softc {
247 ACPI_HANDLE ec_handle;
249 ACPI_HANDLE ec_gpehandle;
254 struct resource *ec_data_res;
255 bus_space_tag_t ec_data_tag;
256 bus_space_handle_t ec_data_handle;
259 struct resource *ec_csr_res;
260 bus_space_tag_t ec_csr_tag;
261 bus_space_handle_t ec_csr_handle;
272 * I couldn't find it in the spec but other implementations also use a
273 * value of 1 ms for the time to acquire global lock.
275 #define EC_LOCK_TIMEOUT 1000
277 /* Default delay in microseconds between each run of the status polling loop. */
278 #define EC_POLL_DELAY 10
280 /* Default time in microseconds spent polling before sleep waiting. */
281 #define EC_POLL_TIME 500
283 /* Total time in ms spent waiting for a response from EC. */
284 #define EC_TIMEOUT 500
286 #define EVENT_READY(event, status) \
287 (((event) == EC_EVENT_OUTPUT_BUFFER_FULL && \
288 ((status) & EC_FLAG_OUTPUT_BUFFER) != 0) || \
289 ((event) == EC_EVENT_INPUT_BUFFER_EMPTY && \
290 ((status) & EC_FLAG_INPUT_BUFFER) == 0))
292 ACPI_SERIAL_DECL(ec, "ACPI embedded controller");
294 SYSCTL_DECL(_debug_acpi);
295 SYSCTL_NODE(_debug_acpi, OID_AUTO, ec, CTLFLAG_RD, NULL, "EC debugging");
297 static int ec_burst_mode;
298 TUNABLE_INT("debug.acpi.ec.burst", &ec_burst_mode);
299 SYSCTL_INT(_debug_acpi_ec, OID_AUTO, burst, CTLFLAG_RW, &ec_burst_mode, 0,
300 "Enable use of burst mode (faster for nearly all systems)");
301 static int ec_poll_time = EC_POLL_TIME;
302 TUNABLE_INT("debug.acpi.ec.poll_time", &ec_poll_time);
303 SYSCTL_INT(_debug_acpi_ec, OID_AUTO, poll_time, CTLFLAG_RW, &ec_poll_time,
304 EC_POLL_TIME, "Time spent polling vs. sleeping (CPU intensive)");
305 static int ec_timeout = EC_TIMEOUT;
306 TUNABLE_INT("debug.acpi.ec.timeout", &ec_timeout);
307 SYSCTL_INT(_debug_acpi_ec, OID_AUTO, timeout, CTLFLAG_RW, &ec_timeout,
308 EC_TIMEOUT, "Total time spent waiting for a response (poll+sleep)");
310 static __inline ACPI_STATUS
311 EcLock(struct acpi_ec_softc *sc, int serialize)
316 * If caller is executing a series of commands, acquire the exclusive lock
317 * to serialize with other users.
318 * To sync with bottom-half interrupt handler, always acquire the mutex.
322 ACPI_SERIAL_BEGIN(ec);
323 mtx_lock(&sc->ec_mtx);
325 /* If _GLK is non-zero, also acquire the global lock. */
327 status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->ec_glkhandle);
328 if (ACPI_FAILURE(status)) {
329 mtx_unlock(&sc->ec_mtx);
339 EcUnlock(struct acpi_ec_softc *sc)
342 AcpiReleaseGlobalLock(sc->ec_glkhandle);
343 mtx_unlock(&sc->ec_mtx);
344 if (sx_xlocked(&ec_sxlock))
348 static uint32_t EcGpeHandler(void *Context);
349 static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function,
350 void *Context, void **return_Context);
351 static ACPI_STATUS EcSpaceHandler(UINT32 Function,
352 ACPI_PHYSICAL_ADDRESS Address,
353 UINT32 width, ACPI_INTEGER *Value,
354 void *Context, void *RegionContext);
355 static ACPI_STATUS EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event);
356 static ACPI_STATUS EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd);
357 static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address,
359 static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address,
361 static int acpi_ec_probe(device_t dev);
362 static int acpi_ec_attach(device_t dev);
363 static int acpi_ec_shutdown(device_t dev);
364 static int acpi_ec_read_method(device_t dev, u_int addr,
365 ACPI_INTEGER *val, int width);
366 static int acpi_ec_write_method(device_t dev, u_int addr,
367 ACPI_INTEGER val, int width);
369 static device_method_t acpi_ec_methods[] = {
370 /* Device interface */
371 DEVMETHOD(device_probe, acpi_ec_probe),
372 DEVMETHOD(device_attach, acpi_ec_attach),
373 DEVMETHOD(device_shutdown, acpi_ec_shutdown),
375 /* Embedded controller interface */
376 DEVMETHOD(acpi_ec_read, acpi_ec_read_method),
377 DEVMETHOD(acpi_ec_write, acpi_ec_write_method),
382 static driver_t acpi_ec_driver = {
385 sizeof(struct acpi_ec_softc),
388 static devclass_t acpi_ec_devclass;
389 DRIVER_MODULE(acpi_ec, acpi, acpi_ec_driver, acpi_ec_devclass, 0, 0);
390 MODULE_DEPEND(acpi_ec, acpi, 1, 1, 1);
393 * Look for an ECDT and if we find one, set up default GPE and
394 * space handlers to catch attempts to access EC space before
395 * we have a real driver instance in place.
396 * TODO: if people report invalid ECDTs, add a tunable to disable them.
399 acpi_ec_ecdt_probe(device_t parent)
401 ACPI_TABLE_ECDT *ecdt;
405 struct acpi_ec_params *params;
407 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
409 /* Find and validate the ECDT. */
410 status = AcpiGetTable(ACPI_SIG_ECDT, 1, (ACPI_TABLE_HEADER **)&ecdt);
411 if (ACPI_FAILURE(status) ||
412 ecdt->Control.BitWidth != 8 ||
413 ecdt->Data.BitWidth != 8) {
417 /* Create the child device with the given unit number. */
418 child = BUS_ADD_CHILD(parent, 0, "acpi_ec", ecdt->Uid);
420 printf("%s: can't add child\n", __func__);
424 /* Find and save the ACPI handle for this device. */
425 status = AcpiGetHandle(NULL, ecdt->Id, &h);
426 if (ACPI_FAILURE(status)) {
427 device_delete_child(parent, child);
428 printf("%s: can't get handle\n", __func__);
431 acpi_set_handle(child, h);
433 /* Set the data and CSR register addresses. */
434 bus_set_resource(child, SYS_RES_IOPORT, 0, ecdt->Data.Address,
436 bus_set_resource(child, SYS_RES_IOPORT, 1, ecdt->Control.Address,
440 * Store values for the probe/attach routines to use. Store the
441 * ECDT GPE bit and set the global lock flag according to _GLK.
442 * Note that it is not perfectly correct to be evaluating a method
443 * before initializing devices, but in practice this function
444 * should be safe to call at this point.
446 params = malloc(sizeof(struct acpi_ec_params), M_TEMP, M_WAITOK | M_ZERO);
447 params->gpe_handle = NULL;
448 params->gpe_bit = ecdt->Gpe;
449 params->uid = ecdt->Uid;
450 acpi_GetInteger(h, "_GLK", ¶ms->glk);
451 acpi_set_private(child, params);
452 acpi_set_magic(child, (int)&acpi_ec_devclass);
454 /* Finish the attach process. */
455 if (device_probe_and_attach(child) != 0)
456 device_delete_child(parent, child);
460 acpi_ec_probe(device_t dev)
469 struct acpi_ec_params *params;
470 static char *ec_ids[] = { "PNP0C09", NULL };
472 /* Check that this is a device and that EC is not disabled. */
473 if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("ec"))
477 * If probed via ECDT, set description and continue. Otherwise,
478 * we can access the namespace and make sure this is not a
484 buf.Length = ACPI_ALLOCATE_BUFFER;
486 params = acpi_get_private(dev);
488 } else if (!acpi_disabled("ec") &&
489 ACPI_ID_PROBE(device_get_parent(dev), dev, ec_ids)) {
490 params = malloc(sizeof(struct acpi_ec_params), M_TEMP,
492 h = acpi_get_handle(dev);
495 * Read the unit ID to check for duplicate attach and the
496 * global lock value to see if we should acquire it when
499 status = acpi_GetInteger(h, "_UID", ¶ms->uid);
500 if (ACPI_FAILURE(status))
502 status = acpi_GetInteger(h, "_GLK", ¶ms->glk);
503 if (ACPI_FAILURE(status))
507 * Evaluate the _GPE method to find the GPE bit used by the EC to
508 * signal status (SCI). If it's a package, it contains a reference
509 * and GPE bit, similar to _PRW.
511 status = AcpiEvaluateObject(h, "_GPE", NULL, &buf);
512 if (ACPI_FAILURE(status)) {
513 device_printf(dev, "can't evaluate _GPE - %s\n",
514 AcpiFormatException(status));
517 obj = (ACPI_OBJECT *)buf.Pointer;
522 case ACPI_TYPE_INTEGER:
523 params->gpe_handle = NULL;
524 params->gpe_bit = obj->Integer.Value;
526 case ACPI_TYPE_PACKAGE:
527 if (!ACPI_PKG_VALID(obj, 2))
530 acpi_GetReference(NULL, &obj->Package.Elements[0]);
531 if (params->gpe_handle == NULL ||
532 acpi_PkgInt32(obj, 1, ¶ms->gpe_bit) != 0)
536 device_printf(dev, "_GPE has invalid type %d\n", obj->Type);
540 /* Store the values we got from the namespace for attach. */
541 acpi_set_private(dev, params);
544 * Check for a duplicate probe. This can happen when a probe
545 * via ECDT succeeded already. If this is a duplicate, disable
548 peer = devclass_get_device(acpi_ec_devclass, params->uid);
549 if (peer == NULL || !device_is_alive(peer))
557 snprintf(desc, sizeof(desc), "Embedded Controller: GPE %#x%s%s",
558 params->gpe_bit, (params->glk) ? ", GLK" : "",
559 DEV_ECDT(dev) ? ", ECDT" : "");
560 device_set_desc_copy(dev, desc);
563 if (ret > 0 && params)
564 free(params, M_TEMP);
566 AcpiOsFree(buf.Pointer);
571 acpi_ec_attach(device_t dev)
573 struct acpi_ec_softc *sc;
574 struct acpi_ec_params *params;
577 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
579 /* Fetch/initialize softc (assumes softc is pre-zeroed). */
580 sc = device_get_softc(dev);
581 params = acpi_get_private(dev);
583 sc->ec_handle = acpi_get_handle(dev);
584 mtx_init(&sc->ec_mtx, "ACPI EC lock", NULL, MTX_DEF);
586 /* Retrieve previously probed values via device ivars. */
587 sc->ec_glk = params->glk;
588 sc->ec_gpebit = params->gpe_bit;
589 sc->ec_gpehandle = params->gpe_handle;
590 sc->ec_uid = params->uid;
591 free(params, M_TEMP);
593 /* Attach bus resources for data and command/status ports. */
595 sc->ec_data_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
596 &sc->ec_data_rid, RF_ACTIVE);
597 if (sc->ec_data_res == NULL) {
598 device_printf(dev, "can't allocate data port\n");
601 sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
602 sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);
605 sc->ec_csr_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
606 &sc->ec_csr_rid, RF_ACTIVE);
607 if (sc->ec_csr_res == NULL) {
608 device_printf(dev, "can't allocate command/status port\n");
611 sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
612 sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);
615 * Install a handler for this EC's GPE bit. We want edge-triggered
618 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE handler\n"));
619 Status = AcpiInstallGpeHandler(sc->ec_gpehandle, sc->ec_gpebit,
620 ACPI_GPE_EDGE_TRIGGERED, &EcGpeHandler, sc);
621 if (ACPI_FAILURE(Status)) {
622 device_printf(dev, "can't install GPE handler for %s - %s\n",
623 acpi_name(sc->ec_handle), AcpiFormatException(Status));
628 * Install address space handler
630 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
631 Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
632 &EcSpaceHandler, &EcSpaceSetup, sc);
633 if (ACPI_FAILURE(Status)) {
634 device_printf(dev, "can't install address space handler for %s - %s\n",
635 acpi_name(sc->ec_handle), AcpiFormatException(Status));
639 /* Enable runtime GPEs for the handler. */
640 Status = AcpiSetGpeType(sc->ec_gpehandle, sc->ec_gpebit,
641 ACPI_GPE_TYPE_RUNTIME);
642 if (ACPI_FAILURE(Status)) {
643 device_printf(dev, "AcpiSetGpeType failed: %s\n",
644 AcpiFormatException(Status));
647 Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_NOT_ISR);
648 if (ACPI_FAILURE(Status)) {
649 device_printf(dev, "AcpiEnableGpe failed: %s\n",
650 AcpiFormatException(Status));
654 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "acpi_ec_attach complete\n"));
658 AcpiRemoveGpeHandler(sc->ec_gpehandle, sc->ec_gpebit, &EcGpeHandler);
659 AcpiRemoveAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
662 bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid,
665 bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
667 mtx_destroy(&sc->ec_mtx);
672 acpi_ec_shutdown(device_t dev)
674 struct acpi_ec_softc *sc;
676 /* Disable the GPE so we don't get EC events during shutdown. */
677 sc = device_get_softc(dev);
678 AcpiDisableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_NOT_ISR);
682 /* Methods to allow other devices (e.g., smbat) to read/write EC space. */
684 acpi_ec_read_method(device_t dev, u_int addr, ACPI_INTEGER *val, int width)
686 struct acpi_ec_softc *sc;
689 sc = device_get_softc(dev);
690 status = EcSpaceHandler(ACPI_READ, addr, width * 8, val, sc, NULL);
691 if (ACPI_FAILURE(status))
697 acpi_ec_write_method(device_t dev, u_int addr, ACPI_INTEGER val, int width)
699 struct acpi_ec_softc *sc;
702 sc = device_get_softc(dev);
703 status = EcSpaceHandler(ACPI_WRITE, addr, width * 8, &val, sc, NULL);
704 if (ACPI_FAILURE(status))
710 EcGpeQueryHandler(void *Context)
712 struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
717 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
718 KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
720 /* Serialize user access with EcSpaceHandler(). */
721 Status = EcLock(sc, TRUE);
722 if (ACPI_FAILURE(Status)) {
723 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
724 "GpeQuery lock error: %s\n", AcpiFormatException(Status));
729 * Send a query command to the EC to find out which _Qxx call it
730 * wants to make. This command clears the SCI bit and also the
731 * interrupt source since we are edge-triggered.
733 Status = EcCommand(sc, EC_COMMAND_QUERY);
734 if (ACPI_FAILURE(Status)) {
736 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
737 "GPE query failed - %s\n", AcpiFormatException(Status));
740 Data = EC_GET_DATA(sc);
741 sc->ec_sci_pend = FALSE;
743 /* Drop locks before evaluating _Qxx method since it may trigger GPEs. */
746 /* Ignore the value for "no outstanding event". (13.3.5) */
747 CTR2(KTR_ACPI, "ec query ok,%s running _Q%02x", Data ? "" : " not", Data);
751 /* Evaluate _Qxx to respond to the controller. */
752 snprintf(qxx, sizeof(qxx), "_Q%02x", Data);
754 Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
755 if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
756 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
757 "evaluation of GPE query method %s failed - %s\n",
758 qxx, AcpiFormatException(Status));
762 /* Re-enable the GPE event so we'll get future requests. */
763 Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_ISR);
764 if (ACPI_FAILURE(Status))
765 printf("EcGpeQueryHandler: AcpiEnableEvent failed\n");
769 * Handle a GPE. Currently we only handle SCI events as others must
770 * be handled by polling in EcWaitEvent(). This is because some ECs
771 * treat events as level when they should be edge-triggered.
774 EcGpeHandler(void *Context)
776 struct acpi_ec_softc *sc = Context;
781 KASSERT(Context != NULL, ("EcGpeHandler called with NULL"));
784 * Disable further GPEs while we handle this one. Since we are directly
785 * called by ACPI-CA and it may have unknown locks held, we specify the
786 * ACPI_ISR flag to keep it from acquiring any more mutexes (although
787 * sleeping would be ok since we're in an ithread.)
789 AcpiDisableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_ISR);
791 /* For interrupt (GPE) handler, don't acquire serialization lock. */
792 Status = EcLock(sc, FALSE);
793 if (ACPI_FAILURE(Status)) {
794 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
795 "GpeQuery lock error: %s\n", AcpiFormatException(Status));
800 * If burst was active, but the status bit was cleared, the EC had to
801 * exit burst mode for some reason. Record this for later.
803 EcStatus = EC_GET_CSR(sc);
804 if (sc->ec_burstactive && (EcStatus & EC_FLAG_BURST_MODE) == 0) {
805 CTR0(KTR_ACPI, "ec burst disabled in query handler");
806 sc->ec_burstactive = FALSE;
810 * If the EC_SCI bit of the status register is not set, then pass
811 * it along to any potential waiters as it may be an IBE/OBF event.
812 * If it is set, queue a query handler.
815 if ((EcStatus & EC_EVENT_SCI) == 0) {
816 CTR1(KTR_ACPI, "ec event was IBE/OBF, status %#x", EcStatus);
817 sc->ec_csrvalue = EcStatus;
818 wakeup(&sc->ec_csrvalue);
819 } else if (!sc->ec_sci_pend) {
820 /* SCI bit set and no pending query handler, so schedule one. */
821 CTR0(KTR_ACPI, "ec queueing gpe handler");
822 Status = AcpiOsExecute(OSL_GPE_HANDLER, EcGpeQueryHandler, Context);
823 if (ACPI_SUCCESS(Status)) {
824 sc->ec_sci_pend = TRUE;
827 printf("Queuing GPE query handler failed.\n");
831 * If we didn't queue a query handler, which will eventually re-enable
832 * the GPE, re-enable it right now so we can get more events.
835 Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_ISR);
836 if (ACPI_FAILURE(Status))
837 printf("EcGpeHandler: AcpiEnableGpe failed\n");
845 EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context,
846 void **RegionContext)
849 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
852 * If deactivating a region, always set the output to NULL. Otherwise,
853 * just pass the context through.
855 if (Function == ACPI_REGION_DEACTIVATE)
856 *RegionContext = NULL;
858 *RegionContext = Context;
860 return_ACPI_STATUS (AE_OK);
864 EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 width,
865 ACPI_INTEGER *Value, void *Context, void *RegionContext)
867 struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
869 UINT8 EcAddr, EcData;
872 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
874 if (width % 8 != 0 || Value == NULL || Context == NULL)
875 return_ACPI_STATUS (AE_BAD_PARAMETER);
876 if (Address + (width / 8) - 1 > 0xFF)
877 return_ACPI_STATUS (AE_BAD_ADDRESS);
879 if (Function == ACPI_READ)
884 /* Grab serialization lock to hold across command sequence. */
885 Status = EcLock(sc, TRUE);
886 if (ACPI_FAILURE(Status))
887 return_ACPI_STATUS (Status);
889 /* Perform the transaction(s), based on width. */
890 for (i = 0; i < width; i += 8, EcAddr++) {
893 Status = EcRead(sc, EcAddr, &EcData);
894 if (ACPI_SUCCESS(Status))
895 *Value |= ((ACPI_INTEGER)EcData) << i;
898 EcData = (UINT8)((*Value) >> i);
899 Status = EcWrite(sc, EcAddr, &EcData);
902 device_printf(sc->ec_dev, "invalid EcSpaceHandler function %d\n",
904 Status = AE_BAD_PARAMETER;
907 if (ACPI_FAILURE(Status))
912 return_ACPI_STATUS (Status);
916 EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event)
920 int count, i, retval, slp_ival;
922 ACPI_SERIAL_ASSERT(ec);
923 Status = AE_NO_HARDWARE_RESPONSE;
927 * Poll for up to ec_poll_time microseconds since many ECs complete
928 * the command quickly, especially if in burst mode.
930 #if 0 /* Enable this as a possible workaround if EC times out. */
931 AcpiOsStall(EC_POLL_DELAY);
933 count = ec_poll_time / EC_POLL_DELAY;
936 for (i = 0; i < count; i++) {
937 EcStatus = EC_GET_CSR(sc);
938 if (sc->ec_burstactive && (EcStatus & EC_FLAG_BURST_MODE) == 0) {
939 CTR0(KTR_ACPI, "ec burst disabled in waitevent (poll)");
940 sc->ec_burstactive = FALSE;
942 if (EVENT_READY(Event, EcStatus)) {
943 CTR1(KTR_ACPI, "ec poll wait ready, status %#x", EcStatus);
947 AcpiOsStall(EC_POLL_DELAY);
951 * If we still don't have a response and we're up and running, wait up
952 * to ec_timeout ms for completion, sleeping for chunks of 1 ms or the
953 * smallest resolution hz supports.
956 if (Status != AE_OK) {
959 slp_ival = hz / 1000;
961 count = ec_timeout / slp_ival;
963 /* hz has less than 1000 Hz resolution so scale timeout. */
965 count = ec_timeout / (1000 / hz);
969 for (i = 0; i < count; i++) {
971 EcStatus = EC_GET_CSR(sc);
973 EcStatus = sc->ec_csrvalue;
974 if (sc->ec_burstactive && (EcStatus & EC_FLAG_BURST_MODE) == 0) {
975 CTR0(KTR_ACPI, "ec burst disabled in waitevent (slp)");
976 sc->ec_burstactive = FALSE;
978 if (EVENT_READY(Event, EcStatus)) {
979 CTR1(KTR_ACPI, "ec sleep wait ready, status %#x", EcStatus);
984 retval = msleep(&sc->ec_csrvalue, &sc->ec_mtx, PZERO, "ecpoll",
995 EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd)
1001 ACPI_SERIAL_ASSERT(ec);
1003 /* Don't use burst mode if user disabled it. */
1004 if (!ec_burst_mode && cmd == EC_COMMAND_BURST_ENABLE)
1007 /* Decide what to wait for based on command type. */
1009 case EC_COMMAND_READ:
1010 case EC_COMMAND_WRITE:
1011 case EC_COMMAND_BURST_DISABLE:
1012 event = EC_EVENT_INPUT_BUFFER_EMPTY;
1014 case EC_COMMAND_QUERY:
1015 case EC_COMMAND_BURST_ENABLE:
1016 event = EC_EVENT_OUTPUT_BUFFER_FULL;
1019 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
1020 "EcCommand: Invalid command %#x\n", cmd);
1021 return (AE_BAD_PARAMETER);
1024 /* Run the command and wait for the chosen event. */
1025 CTR1(KTR_ACPI, "ec running command %#x", cmd);
1026 EC_SET_CSR(sc, cmd);
1027 status = EcWaitEvent(sc, event);
1028 if (ACPI_SUCCESS(status)) {
1029 /* If we succeeded, burst flag should now be present. */
1030 if (cmd == EC_COMMAND_BURST_ENABLE) {
1031 ec_status = EC_GET_CSR(sc);
1032 if ((ec_status & EC_FLAG_BURST_MODE) == 0)
1036 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
1037 "EcCommand: no response to %#x\n", cmd);
1044 EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
1049 ACPI_SERIAL_ASSERT(ec);
1050 CTR1(KTR_ACPI, "ec read from %#x", Address);
1052 /* If we can't start burst mode, continue anyway. */
1053 status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
1054 if (status == AE_OK) {
1055 data = EC_GET_DATA(sc);
1056 if (data == EC_BURST_ACK) {
1057 CTR0(KTR_ACPI, "ec burst enabled");
1058 sc->ec_burstactive = TRUE;
1062 status = EcCommand(sc, EC_COMMAND_READ);
1063 if (ACPI_FAILURE(status))
1066 EC_SET_DATA(sc, Address);
1067 status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL);
1068 if (ACPI_FAILURE(status)) {
1069 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
1070 "EcRead: Failed waiting for EC to send data.\n");
1074 *Data = EC_GET_DATA(sc);
1076 if (sc->ec_burstactive) {
1077 status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
1078 if (ACPI_FAILURE(status))
1080 sc->ec_burstactive = FALSE;
1081 CTR0(KTR_ACPI, "ec disabled burst ok");
1088 EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
1093 ACPI_SERIAL_ASSERT(ec);
1094 CTR2(KTR_ACPI, "ec write to %#x, data %#x", Address, *Data);
1096 /* If we can't start burst mode, continue anyway. */
1097 status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
1098 if (status == AE_OK) {
1099 data = EC_GET_DATA(sc);
1100 if (data == EC_BURST_ACK) {
1101 CTR0(KTR_ACPI, "ec burst enabled");
1102 sc->ec_burstactive = TRUE;
1106 status = EcCommand(sc, EC_COMMAND_WRITE);
1107 if (ACPI_FAILURE(status))
1110 EC_SET_DATA(sc, Address);
1111 status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY);
1112 if (ACPI_FAILURE(status)) {
1113 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
1114 "EcRead: Failed waiting for EC to process address\n");
1118 EC_SET_DATA(sc, *Data);
1119 status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY);
1120 if (ACPI_FAILURE(status)) {
1121 ACPI_VPRINT(sc->ec_dev, acpi_device_get_parent_softc(sc->ec_dev),
1122 "EcWrite: Failed waiting for EC to process data\n");
1126 if (sc->ec_burstactive) {
1127 status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
1128 if (ACPI_FAILURE(status))
1130 sc->ec_burstactive = FALSE;
1131 CTR0(KTR_ACPI, "ec disabled burst ok");