Remove inclusion of <sys/cdefs.h> from kernel .c files.
[dragonfly.git] / sys / dev / acpica5 / acpi_ec.c
CommitLineData
5ed44076 1/*-
10f97674 2 * Copyright (c) 2003-2007 Nate Lawson
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3 * Copyright (c) 2000 Michael Smith
4 * Copyright (c) 2000 BSDi
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
32af04f7
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27 *
28 * $FreeBSD: src/sys/dev/acpica/acpi_ec.c,v 1.76.2.1.6.1 2009/04/15 03:14:26 kensmith Exp $
5ed44076 29 */
10f97674 30
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31#include "opt_acpi.h"
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/bus.h>
10f97674 35#include <sys/lock.h>
f9d8cd12 36#include <sys/malloc.h>
5895535b 37#include <sys/module.h>
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38#include <sys/rman.h>
39
40#include "acpi.h"
5ed44076 41#include <dev/acpica5/acpivar.h>
10f97674 42#include "acutils.h"
5ed44076 43
10f97674 44/* Hooks for the ACPI CA debugging infrastructure */
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45#define _COMPONENT ACPI_EC
46ACPI_MODULE_NAME("EC")
47
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48#define rebooting 0
49#define PZERO 0
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50/*
51 * EC_COMMAND:
52 * -----------
53 */
54typedef UINT8 EC_COMMAND;
55
56#define EC_COMMAND_UNKNOWN ((EC_COMMAND) 0x00)
57#define EC_COMMAND_READ ((EC_COMMAND) 0x80)
58#define EC_COMMAND_WRITE ((EC_COMMAND) 0x81)
59#define EC_COMMAND_BURST_ENABLE ((EC_COMMAND) 0x82)
60#define EC_COMMAND_BURST_DISABLE ((EC_COMMAND) 0x83)
61#define EC_COMMAND_QUERY ((EC_COMMAND) 0x84)
62
10f97674 63/*
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64 * EC_STATUS:
65 * ----------
66 * The encoding of the EC status register is illustrated below.
67 * Note that a set bit (1) indicates the property is TRUE
68 * (e.g. if bit 0 is set then the output buffer is full).
69 * +-+-+-+-+-+-+-+-+
10f97674 70 * |7|6|5|4|3|2|1|0|
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71 * +-+-+-+-+-+-+-+-+
72 * | | | | | | | |
73 * | | | | | | | +- Output Buffer Full?
74 * | | | | | | +--- Input Buffer Full?
75 * | | | | | +----- <reserved>
76 * | | | | +------- Data Register is Command Byte?
77 * | | | +--------- Burst Mode Enabled?
78 * | | +----------- SCI Event?
79 * | +------------- SMI Event?
10f97674 80 * +--------------- <reserved>
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81 *
82 */
83typedef UINT8 EC_STATUS;
84
85#define EC_FLAG_OUTPUT_BUFFER ((EC_STATUS) 0x01)
86#define EC_FLAG_INPUT_BUFFER ((EC_STATUS) 0x02)
10f97674 87#define EC_FLAG_DATA_IS_CMD ((EC_STATUS) 0x08)
5ed44076 88#define EC_FLAG_BURST_MODE ((EC_STATUS) 0x10)
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89
90/*
91 * EC_EVENT:
92 * ---------
93 */
94typedef UINT8 EC_EVENT;
95
96#define EC_EVENT_UNKNOWN ((EC_EVENT) 0x00)
97#define EC_EVENT_OUTPUT_BUFFER_FULL ((EC_EVENT) 0x01)
98#define EC_EVENT_INPUT_BUFFER_EMPTY ((EC_EVENT) 0x02)
99#define EC_EVENT_SCI ((EC_EVENT) 0x20)
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100#define EC_EVENT_SMI ((EC_EVENT) 0x40)
101
102/* Data byte returned after burst enable indicating it was successful. */
103#define EC_BURST_ACK 0x90
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104
105/*
106 * Register access primitives
107 */
108#define EC_GET_DATA(sc) \
109 bus_space_read_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0)
110
111#define EC_SET_DATA(sc, v) \
112 bus_space_write_1((sc)->ec_data_tag, (sc)->ec_data_handle, 0, (v))
113
114#define EC_GET_CSR(sc) \
115 bus_space_read_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0)
116
117#define EC_SET_CSR(sc, v) \
118 bus_space_write_1((sc)->ec_csr_tag, (sc)->ec_csr_handle, 0, (v))
119
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120/* Additional params to pass from the probe routine */
121struct acpi_ec_params {
122 int glk;
123 int gpe_bit;
124 ACPI_HANDLE gpe_handle;
125 int uid;
126};
5ed44076 127
f9d8cd12 128/* Indicate that this device has already been probed via ECDT. */
10f97674 129#define DEV_ECDT(x) (acpi_get_magic(x) == (uintptr_t)&acpi_ec_devclass)
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130
131/*
132 * Driver softc.
133 */
134struct acpi_ec_softc {
135 device_t ec_dev;
136 ACPI_HANDLE ec_handle;
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137 int ec_uid;
138 ACPI_HANDLE ec_gpehandle;
5ed44076 139 UINT8 ec_gpebit;
10f97674 140
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141 int ec_data_rid;
142 struct resource *ec_data_res;
143 bus_space_tag_t ec_data_tag;
144 bus_space_handle_t ec_data_handle;
145
146 int ec_csr_rid;
147 struct resource *ec_csr_res;
148 bus_space_tag_t ec_csr_tag;
149 bus_space_handle_t ec_csr_handle;
150
151 int ec_glk;
152 int ec_glkhandle;
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153 int ec_burstactive;
154 int ec_sci_pend;
155 u_int ec_gencount;
156 int ec_suspending;
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157};
158
159/*
10f97674 160 * XXX njl
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161 * I couldn't find it in the spec but other implementations also use a
162 * value of 1 ms for the time to acquire global lock.
163 */
164#define EC_LOCK_TIMEOUT 1000
165
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166/* Default delay in microseconds between each run of the status polling loop. */
167#define EC_POLL_DELAY 5
5ed44076 168
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169/* Total time in ms spent waiting for a response from EC. */
170#define EC_TIMEOUT 750
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171
172#define EVENT_READY(event, status) \
173 (((event) == EC_EVENT_OUTPUT_BUFFER_FULL && \
174 ((status) & EC_FLAG_OUTPUT_BUFFER) != 0) || \
175 ((event) == EC_EVENT_INPUT_BUFFER_EMPTY && \
176 ((status) & EC_FLAG_INPUT_BUFFER) == 0))
177
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178ACPI_SERIAL_DECL(ec, "ACPI embedded controller");
179
180SYSCTL_DECL(_debug_acpi);
181SYSCTL_NODE(_debug_acpi, OID_AUTO, ec, CTLFLAG_RD, NULL, "EC debugging");
5ed44076 182
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183static int ec_burst_mode;
184TUNABLE_INT("debug.acpi.ec.burst", &ec_burst_mode);
185SYSCTL_INT(_debug_acpi_ec, OID_AUTO, burst, CTLFLAG_RW, &ec_burst_mode, 0,
186 "Enable use of burst mode (faster for nearly all systems)");
187static int ec_polled_mode;
188TUNABLE_INT("debug.acpi.ec.polled", &ec_polled_mode);
189SYSCTL_INT(_debug_acpi_ec, OID_AUTO, polled, CTLFLAG_RW, &ec_polled_mode, 0,
190 "Force use of polled mode (only if interrupt mode doesn't work)");
191static int ec_timeout = EC_TIMEOUT;
192TUNABLE_INT("debug.acpi.ec.timeout", &ec_timeout);
193SYSCTL_INT(_debug_acpi_ec, OID_AUTO, timeout, CTLFLAG_RW, &ec_timeout,
194 EC_TIMEOUT, "Total time spent waiting for a response (poll+sleep)");
195
196static ACPI_STATUS
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197EcLock(struct acpi_ec_softc *sc)
198{
10f97674 199 ACPI_STATUS status;
5ed44076 200
af0c5620 201 ACPI_SERIAL_BEGIN(ec);
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202 /* If _GLK is non-zero, acquire the global lock. */
203 status = AE_OK;
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204 if (sc->ec_glk) {
205 status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->ec_glkhandle);
206 if (ACPI_FAILURE(status))
af0c5620 207 ACPI_SERIAL_END(ec);
5ed44076 208 }
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209 return (status);
210}
211
10f97674 212static void
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213EcUnlock(struct acpi_ec_softc *sc)
214{
215 if (sc->ec_glk)
216 AcpiReleaseGlobalLock(sc->ec_glkhandle);
af0c5620 217 ACPI_SERIAL_END(ec);
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218}
219
49e48b8a 220static uint32_t EcGpeHandler(void *Context);
10f97674 221static ACPI_STATUS EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function,
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222 void *Context, void **return_Context);
223static ACPI_STATUS EcSpaceHandler(UINT32 Function,
224 ACPI_PHYSICAL_ADDRESS Address,
225 UINT32 width, ACPI_INTEGER *Value,
226 void *Context, void *RegionContext);
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227static ACPI_STATUS EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event,
228 u_int gen_count);
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229static ACPI_STATUS EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd);
230static ACPI_STATUS EcRead(struct acpi_ec_softc *sc, UINT8 Address,
231 UINT8 *Data);
232static ACPI_STATUS EcWrite(struct acpi_ec_softc *sc, UINT8 Address,
233 UINT8 *Data);
234static int acpi_ec_probe(device_t dev);
235static int acpi_ec_attach(device_t dev);
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236static int acpi_ec_suspend(device_t dev);
237static int acpi_ec_resume(device_t dev);
238static int acpi_ec_shutdown(device_t dev);
676159d4
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239static int acpi_ec_read_method(device_t dev, u_int addr,
240 ACPI_INTEGER *val, int width);
241static int acpi_ec_write_method(device_t dev, u_int addr,
242 ACPI_INTEGER val, int width);
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243
244static device_method_t acpi_ec_methods[] = {
245 /* Device interface */
246 DEVMETHOD(device_probe, acpi_ec_probe),
247 DEVMETHOD(device_attach, acpi_ec_attach),
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248 DEVMETHOD(device_suspend, acpi_ec_suspend),
249 DEVMETHOD(device_resume, acpi_ec_resume),
250 DEVMETHOD(device_shutdown, acpi_ec_shutdown),
5ed44076 251
676159d4 252 /* Embedded controller interface */
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253 DEVMETHOD(acpi_ec_read, acpi_ec_read_method),
254 DEVMETHOD(acpi_ec_write, acpi_ec_write_method),
676159d4 255
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256 {0, 0}
257};
258
259static driver_t acpi_ec_driver = {
260 "acpi_ec",
261 acpi_ec_methods,
262 sizeof(struct acpi_ec_softc),
263};
264
265static devclass_t acpi_ec_devclass;
266DRIVER_MODULE(acpi_ec, acpi, acpi_ec_driver, acpi_ec_devclass, 0, 0);
f9d8cd12 267MODULE_DEPEND(acpi_ec, acpi, 1, 1, 1);
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268
269/*
10f97674 270 * Look for an ECDT and if we find one, set up default GPE and
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271 * space handlers to catch attempts to access EC space before
272 * we have a real driver instance in place.
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273 *
274 * TODO: Some old Gateway laptops need us to fake up an ECDT or
275 * otherwise attach early so that _REG methods can run.
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276 */
277void
278acpi_ec_ecdt_probe(device_t parent)
279{
280 ACPI_TABLE_ECDT *ecdt;
281 ACPI_STATUS status;
282 device_t child;
283 ACPI_HANDLE h;
f9d8cd12 284 struct acpi_ec_params *params;
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285
286 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
287
288 /* Find and validate the ECDT. */
e1eeedd0 289 status = AcpiGetTable(ACPI_SIG_ECDT, 1, (ACPI_TABLE_HEADER **)&ecdt);
5ed44076 290 if (ACPI_FAILURE(status) ||
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291 ecdt->Control.BitWidth != 8 ||
292 ecdt->Data.BitWidth != 8) {
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293 return;
294 }
295
296 /* Create the child device with the given unit number. */
e1eeedd0 297 child = BUS_ADD_CHILD(parent, parent, 0, "acpi_ec", ecdt->Uid);
5ed44076 298 if (child == NULL) {
e3869ec7 299 kprintf("%s: can't add child\n", __func__);
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300 return;
301 }
302
303 /* Find and save the ACPI handle for this device. */
e1eeedd0 304 status = AcpiGetHandle(NULL, ecdt->Id, &h);
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305 if (ACPI_FAILURE(status)) {
306 device_delete_child(parent, child);
e3869ec7 307 kprintf("%s: can't get handle\n", __func__);
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308 return;
309 }
310 acpi_set_handle(child, h);
311
312 /* Set the data and CSR register addresses. */
e1eeedd0 313 bus_set_resource(child, SYS_RES_IOPORT, 0, ecdt->Data.Address,
5ed44076 314 /*count*/1);
e1eeedd0 315 bus_set_resource(child, SYS_RES_IOPORT, 1, ecdt->Control.Address,
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316 /*count*/1);
317
318 /*
319 * Store values for the probe/attach routines to use. Store the
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320 * ECDT GPE bit and set the global lock flag according to _GLK.
321 * Note that it is not perfectly correct to be evaluating a method
322 * before initializing devices, but in practice this function
323 * should be safe to call at this point.
5ed44076 324 */
efda3bd0 325 params = kmalloc(sizeof(struct acpi_ec_params), M_TEMP, M_WAITOK | M_ZERO);
f9d8cd12 326 params->gpe_handle = NULL;
e1eeedd0
YT
327 params->gpe_bit = ecdt->Gpe;
328 params->uid = ecdt->Uid;
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MD
329 acpi_GetInteger(h, "_GLK", &params->glk);
330 acpi_set_private(child, params);
10f97674 331 acpi_set_magic(child, (uintptr_t)&acpi_ec_devclass);
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332
333 /* Finish the attach process. */
334 if (device_probe_and_attach(child) != 0)
335 device_delete_child(parent, child);
336}
337
338static int
339acpi_ec_probe(device_t dev)
340{
f9d8cd12 341 ACPI_BUFFER buf;
5ed44076 342 ACPI_HANDLE h;
f9d8cd12 343 ACPI_OBJECT *obj;
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344 ACPI_STATUS status;
345 device_t peer;
346 char desc[64];
f9d8cd12
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347 int ret;
348 struct acpi_ec_params *params;
10f97674 349 static char *ec_ids[] = { "PNP0C09", NULL };
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350
351 /* Check that this is a device and that EC is not disabled. */
352 if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("ec"))
353 return (ENXIO);
354
355 /*
356 * If probed via ECDT, set description and continue. Otherwise,
357 * we can access the namespace and make sure this is not a
358 * duplicate probe.
359 */
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MD
360 ret = ENXIO;
361 params = NULL;
362 buf.Pointer = NULL;
363 buf.Length = ACPI_ALLOCATE_BUFFER;
5ed44076 364 if (DEV_ECDT(dev)) {
f9d8cd12 365 params = acpi_get_private(dev);
5ed44076 366 ret = 0;
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AP
367 } else if (!acpi_disabled("ec") &&
368 ACPI_ID_PROBE(device_get_parent(dev), dev, ec_ids)) {
efda3bd0 369 params = kmalloc(sizeof(struct acpi_ec_params), M_TEMP,
f9d8cd12 370 M_WAITOK | M_ZERO);
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371 h = acpi_get_handle(dev);
372
373 /*
374 * Read the unit ID to check for duplicate attach and the
375 * global lock value to see if we should acquire it when
376 * accessing the EC.
377 */
f9d8cd12 378 status = acpi_GetInteger(h, "_UID", &params->uid);
5ed44076 379 if (ACPI_FAILURE(status))
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MD
380 params->uid = 0;
381 status = acpi_GetInteger(h, "_GLK", &params->glk);
5ed44076 382 if (ACPI_FAILURE(status))
f9d8cd12 383 params->glk = 0;
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384
385 /*
386 * Evaluate the _GPE method to find the GPE bit used by the EC to
f9d8cd12
MD
387 * signal status (SCI). If it's a package, it contains a reference
388 * and GPE bit, similar to _PRW.
5ed44076 389 */
f9d8cd12 390 status = AcpiEvaluateObject(h, "_GPE", NULL, &buf);
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MD
391 if (ACPI_FAILURE(status)) {
392 device_printf(dev, "can't evaluate _GPE - %s\n",
393 AcpiFormatException(status));
10f97674 394 goto out;
5ed44076 395 }
f9d8cd12
MD
396 obj = (ACPI_OBJECT *)buf.Pointer;
397 if (obj == NULL)
10f97674 398 goto out;
f9d8cd12
MD
399
400 switch (obj->Type) {
401 case ACPI_TYPE_INTEGER:
402 params->gpe_handle = NULL;
403 params->gpe_bit = obj->Integer.Value;
404 break;
405 case ACPI_TYPE_PACKAGE:
406 if (!ACPI_PKG_VALID(obj, 2))
407 goto out;
408 params->gpe_handle =
409 acpi_GetReference(NULL, &obj->Package.Elements[0]);
410 if (params->gpe_handle == NULL ||
411 acpi_PkgInt32(obj, 1, &params->gpe_bit) != 0)
412 goto out;
413 break;
414 default:
415 device_printf(dev, "_GPE has invalid type %d\n", obj->Type);
416 goto out;
417 }
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418
419 /* Store the values we got from the namespace for attach. */
f9d8cd12 420 acpi_set_private(dev, params);
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421
422 /*
423 * Check for a duplicate probe. This can happen when a probe
f9d8cd12
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424 * via ECDT succeeded already. If this is a duplicate, disable
425 * this device.
5ed44076 426 */
f9d8cd12
MD
427 peer = devclass_get_device(acpi_ec_devclass, params->uid);
428 if (peer == NULL || !device_is_alive(peer))
5ed44076 429 ret = 0;
f9d8cd12
MD
430 else
431 device_disable(dev);
432 }
433
434out:
435 if (ret == 0) {
f8c7a42d 436 ksnprintf(desc, sizeof(desc), "Embedded Controller: GPE %#x%s%s",
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437 params->gpe_bit, (params->glk) ? ", GLK" : "",
438 DEV_ECDT(dev) ? ", ECDT" : "");
439 device_set_desc_copy(dev, desc);
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440 }
441
f9d8cd12 442 if (ret > 0 && params)
efda3bd0 443 kfree(params, M_TEMP);
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444 if (buf.Pointer)
445 AcpiOsFree(buf.Pointer);
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446 return (ret);
447}
448
449static int
450acpi_ec_attach(device_t dev)
451{
452 struct acpi_ec_softc *sc;
f9d8cd12 453 struct acpi_ec_params *params;
5ed44076 454 ACPI_STATUS Status;
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455
456 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
457
458 /* Fetch/initialize softc (assumes softc is pre-zeroed). */
459 sc = device_get_softc(dev);
f9d8cd12 460 params = acpi_get_private(dev);
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461 sc->ec_dev = dev;
462 sc->ec_handle = acpi_get_handle(dev);
5c7ffd75 463 ACPI_SERIAL_INIT(ec);
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464
465 /* Retrieve previously probed values via device ivars. */
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MD
466 sc->ec_glk = params->glk;
467 sc->ec_gpebit = params->gpe_bit;
468 sc->ec_gpehandle = params->gpe_handle;
469 sc->ec_uid = params->uid;
10f97674 470 sc->ec_suspending = FALSE;
efda3bd0 471 kfree(params, M_TEMP);
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472
473 /* Attach bus resources for data and command/status ports. */
474 sc->ec_data_rid = 0;
f9d8cd12
MD
475 sc->ec_data_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
476 &sc->ec_data_rid, RF_ACTIVE);
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477 if (sc->ec_data_res == NULL) {
478 device_printf(dev, "can't allocate data port\n");
49e48b8a 479 goto error;
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480 }
481 sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
482 sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);
483
484 sc->ec_csr_rid = 1;
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MD
485 sc->ec_csr_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
486 &sc->ec_csr_rid, RF_ACTIVE);
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487 if (sc->ec_csr_res == NULL) {
488 device_printf(dev, "can't allocate command/status port\n");
49e48b8a 489 goto error;
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490 }
491 sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
492 sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);
493
494 /*
495 * Install a handler for this EC's GPE bit. We want edge-triggered
496 * behavior.
497 */
498 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE handler\n"));
f9d8cd12
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499 Status = AcpiInstallGpeHandler(sc->ec_gpehandle, sc->ec_gpebit,
500 ACPI_GPE_EDGE_TRIGGERED, &EcGpeHandler, sc);
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501 if (ACPI_FAILURE(Status)) {
502 device_printf(dev, "can't install GPE handler for %s - %s\n",
503 acpi_name(sc->ec_handle), AcpiFormatException(Status));
49e48b8a 504 goto error;
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505 }
506
10f97674 507 /*
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508 * Install address space handler
509 */
510 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
511 Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
512 &EcSpaceHandler, &EcSpaceSetup, sc);
513 if (ACPI_FAILURE(Status)) {
514 device_printf(dev, "can't install address space handler for %s - %s\n",
515 acpi_name(sc->ec_handle), AcpiFormatException(Status));
49e48b8a
MD
516 goto error;
517 }
518
519 /* Enable runtime GPEs for the handler. */
520 Status = AcpiSetGpeType(sc->ec_gpehandle, sc->ec_gpebit,
521 ACPI_GPE_TYPE_RUNTIME);
522 if (ACPI_FAILURE(Status)) {
523 device_printf(dev, "AcpiSetGpeType failed: %s\n",
524 AcpiFormatException(Status));
525 goto error;
526 }
527 Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_NOT_ISR);
528 if (ACPI_FAILURE(Status)) {
529 device_printf(dev, "AcpiEnableGpe failed: %s\n",
530 AcpiFormatException(Status));
531 goto error;
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532 }
533
534 ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "acpi_ec_attach complete\n"));
535 return (0);
536
49e48b8a
MD
537error:
538 AcpiRemoveGpeHandler(sc->ec_gpehandle, sc->ec_gpebit, &EcGpeHandler);
539 AcpiRemoveAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
540 EcSpaceHandler);
5ed44076 541 if (sc->ec_csr_res)
10f97674 542 bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid,
5ed44076
MD
543 sc->ec_csr_res);
544 if (sc->ec_data_res)
545 bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
546 sc->ec_data_res);
49e48b8a 547 return (ENXIO);
5ed44076
MD
548}
549
10f97674
AP
550static int
551acpi_ec_suspend(device_t dev)
552{
553 struct acpi_ec_softc *sc;
554
555 sc = device_get_softc(dev);
556 sc->ec_suspending = TRUE;
557 return (0);
558}
559
560static int
561acpi_ec_resume(device_t dev)
562{
563 struct acpi_ec_softc *sc;
564
565 sc = device_get_softc(dev);
566 sc->ec_suspending = FALSE;
567 return (0);
568}
569
570static int
571acpi_ec_shutdown(device_t dev)
572{
573 struct acpi_ec_softc *sc;
574
575 /* Disable the GPE so we don't get EC events during shutdown. */
576 sc = device_get_softc(dev);
577 AcpiDisableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_NOT_ISR);
578 return (0);
579}
580
676159d4
HT
581/* Methods to allow other devices (e.g., smbat) to read/write EC space. */
582static int
583acpi_ec_read_method(device_t dev, u_int addr, ACPI_INTEGER *val, int width)
584{
585 struct acpi_ec_softc *sc;
586 ACPI_STATUS status;
587
588 sc = device_get_softc(dev);
589 status = EcSpaceHandler(ACPI_READ, addr, width * 8, val, sc, NULL);
590 if (ACPI_FAILURE(status))
10f97674 591 return (ENXIO);
676159d4
HT
592 return (0);
593}
594
595static int
596acpi_ec_write_method(device_t dev, u_int addr, ACPI_INTEGER val, int width)
597{
598 struct acpi_ec_softc *sc;
599 ACPI_STATUS status;
600
601 sc = device_get_softc(dev);
602 status = EcSpaceHandler(ACPI_WRITE, addr, width * 8, &val, sc, NULL);
603 if (ACPI_FAILURE(status))
10f97674 604 return (ENXIO);
676159d4
HT
605 return (0);
606}
607
5ed44076
MD
608static void
609EcGpeQueryHandler(void *Context)
610{
611 struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
612 UINT8 Data;
613 ACPI_STATUS Status;
5ed44076
MD
614 char qxx[5];
615
616 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
617 KASSERT(Context != NULL, ("EcGpeQueryHandler called with NULL"));
618
10f97674 619 /* Serialize user access with EcSpaceHandler(). */
5ed44076
MD
620 Status = EcLock(sc);
621 if (ACPI_FAILURE(Status)) {
10f97674
AP
622 device_printf(sc->ec_dev, "GpeQuery lock error: %s\n",
623 AcpiFormatException(Status));
5ed44076
MD
624 return;
625 }
626
5ed44076
MD
627 /*
628 * Send a query command to the EC to find out which _Qxx call it
629 * wants to make. This command clears the SCI bit and also the
10f97674
AP
630 * interrupt source since we are edge-triggered. To prevent the GPE
631 * that may arise from running the query from causing another query
632 * to be queued, we clear the pending flag only after running it.
5ed44076
MD
633 */
634 Status = EcCommand(sc, EC_COMMAND_QUERY);
10f97674 635 sc->ec_sci_pend = FALSE;
5ed44076
MD
636 if (ACPI_FAILURE(Status)) {
637 EcUnlock(sc);
10f97674
AP
638 device_printf(sc->ec_dev, "GPE query failed: %s\n",
639 AcpiFormatException(Status));
640 return;
5ed44076
MD
641 }
642 Data = EC_GET_DATA(sc);
10f97674
AP
643
644 /*
645 * We have to unlock before running the _Qxx method below since that
646 * method may attempt to read/write from EC address space, causing
647 * recursive acquisition of the lock.
648 */
5ed44076
MD
649 EcUnlock(sc);
650
651 /* Ignore the value for "no outstanding event". (13.3.5) */
10f97674
AP
652#if 0
653 CTR2(KTR_ACPI, "ec query ok,%s running _Q%02X", Data ? "" : " not", Data);
654#endif
5ed44076 655 if (Data == 0)
10f97674 656 return;
5ed44076
MD
657
658 /* Evaluate _Qxx to respond to the controller. */
10f97674
AP
659 ksnprintf(qxx, sizeof(qxx), "_Q%02X", Data);
660 AcpiUtStrupr(qxx);
5ed44076
MD
661 Status = AcpiEvaluateObject(sc->ec_handle, qxx, NULL, NULL);
662 if (ACPI_FAILURE(Status) && Status != AE_NOT_FOUND) {
10f97674
AP
663 device_printf(sc->ec_dev, "evaluation of query method %s failed: %s\n",
664 qxx, AcpiFormatException(Status));
5ed44076 665 }
5ed44076
MD
666}
667
668/*
10f97674
AP
669 * The GPE handler is called when IBE/OBF or SCI events occur. We are
670 * called from an unknown lock context.
5ed44076 671 */
49e48b8a 672static uint32_t
5ed44076
MD
673EcGpeHandler(void *Context)
674{
675 struct acpi_ec_softc *sc = Context;
676 ACPI_STATUS Status;
10f97674 677 EC_STATUS EcStatus;
5ed44076
MD
678
679 KASSERT(Context != NULL, ("EcGpeHandler called with NULL"));
10f97674
AP
680#if 0
681 CTR0(KTR_ACPI, "ec gpe handler start");
682#endif
683 /*
684 * Notify EcWaitEvent() that the status register is now fresh. If we
685 * didn't do this, it wouldn't be possible to distinguish an old IBE
686 * from a new one, for example when doing a write transaction (writing
687 * address and then data values.)
688 */
689 atomic_add_int(&sc->ec_gencount, 1);
690 wakeup(&sc->ec_gencount);
5ed44076 691
10f97674
AP
692 /*
693 * If the EC_SCI bit of the status register is set, queue a query handler.
694 * It will run the query and _Qxx method later, under the lock.
695 */
696 EcStatus = EC_GET_CSR(sc);
697 if ((EcStatus & EC_EVENT_SCI) && !sc->ec_sci_pend) {
698#if 0
699 CTR0(KTR_ACPI, "ec gpe queueing query handler");
700#endif
701 Status = AcpiOsExecute(OSL_GPE_HANDLER, EcGpeQueryHandler, Context);
702 if (ACPI_SUCCESS(Status))
703 sc->ec_sci_pend = TRUE;
704 else
705 kprintf("EcGpeHandler: queuing GPE query handler failed\n");
5ed44076 706 }
49e48b8a 707 return (0);
5ed44076
MD
708}
709
710static ACPI_STATUS
711EcSpaceSetup(ACPI_HANDLE Region, UINT32 Function, void *Context,
712 void **RegionContext)
713{
714
715 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
716
717 /*
718 * If deactivating a region, always set the output to NULL. Otherwise,
719 * just pass the context through.
720 */
721 if (Function == ACPI_REGION_DEACTIVATE)
722 *RegionContext = NULL;
723 else
724 *RegionContext = Context;
725
726 return_ACPI_STATUS (AE_OK);
727}
728
729static ACPI_STATUS
730EcSpaceHandler(UINT32 Function, ACPI_PHYSICAL_ADDRESS Address, UINT32 width,
731 ACPI_INTEGER *Value, void *Context, void *RegionContext)
732{
733 struct acpi_ec_softc *sc = (struct acpi_ec_softc *)Context;
f9d8cd12 734 ACPI_STATUS Status;
5ed44076
MD
735 UINT8 EcAddr, EcData;
736 int i;
737
738 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)Address);
739
f9d8cd12 740 if (width % 8 != 0 || Value == NULL || Context == NULL)
5ed44076 741 return_ACPI_STATUS (AE_BAD_PARAMETER);
f9d8cd12
MD
742 if (Address + (width / 8) - 1 > 0xFF)
743 return_ACPI_STATUS (AE_BAD_ADDRESS);
5ed44076 744
f9d8cd12
MD
745 if (Function == ACPI_READ)
746 *Value = 0;
5ed44076 747 EcAddr = Address;
f9d8cd12
MD
748 Status = AE_ERROR;
749
10f97674
AP
750 /*
751 * If booting, check if we need to run the query handler. If so, we
752 * we call it directly here since our thread taskq is not active yet.
753 */
754 if (cold || rebooting) {
755 if ((EC_GET_CSR(sc) & EC_EVENT_SCI)) {
756#if 0
757 CTR0(KTR_ACPI, "ec running gpe handler directly");
758#endif
759 EcGpeQueryHandler(sc);
760 }
761 }
762
763 /* Serialize with EcGpeQueryHandler() at transaction granularity. */
764 Status = EcLock(sc);
765 if (ACPI_FAILURE(Status))
766 return_ACPI_STATUS (Status);
767
f9d8cd12
MD
768 /* Perform the transaction(s), based on width. */
769 for (i = 0; i < width; i += 8, EcAddr++) {
5ed44076
MD
770 switch (Function) {
771 case ACPI_READ:
5ed44076 772 Status = EcRead(sc, EcAddr, &EcData);
f9d8cd12
MD
773 if (ACPI_SUCCESS(Status))
774 *Value |= ((ACPI_INTEGER)EcData) << i;
5ed44076
MD
775 break;
776 case ACPI_WRITE:
777 EcData = (UINT8)((*Value) >> i);
778 Status = EcWrite(sc, EcAddr, &EcData);
779 break;
780 default:
781 device_printf(sc->ec_dev, "invalid EcSpaceHandler function %d\n",
782 Function);
783 Status = AE_BAD_PARAMETER;
784 break;
785 }
5ed44076 786 if (ACPI_FAILURE(Status))
f9d8cd12 787 break;
5ed44076 788 }
f9d8cd12 789
10f97674 790 EcUnlock(sc);
5ed44076
MD
791 return_ACPI_STATUS (Status);
792}
793
794static ACPI_STATUS
10f97674 795EcCheckStatus(struct acpi_ec_softc *sc, const char *msg, EC_EVENT event)
5ed44076 796{
10f97674
AP
797 ACPI_STATUS status;
798 EC_STATUS ec_status;
5ed44076 799
10f97674
AP
800 status = AE_NO_HARDWARE_RESPONSE;
801 ec_status = EC_GET_CSR(sc);
802 if (sc->ec_burstactive && !(ec_status & EC_FLAG_BURST_MODE)) {
803#if 0
804 CTR1(KTR_ACPI, "ec burst disabled in waitevent (%s)", msg);
805#endif
806 sc->ec_burstactive = FALSE;
807 }
808 if (EVENT_READY(event, ec_status)) {
809#if 0
810 CTR2(KTR_ACPI, "ec %s wait ready, status %#x", msg, ec_status);
811#endif
812 status = AE_OK;
813 }
814 return (status);
815}
5ed44076 816
10f97674
AP
817static ACPI_STATUS
818EcWaitEvent(struct acpi_ec_softc *sc, EC_EVENT Event, u_int gen_count)
819{
820 ACPI_STATUS Status;
821 int count, i, slp_ival;
5ed44076 822
10f97674
AP
823 ACPI_SERIAL_ASSERT(ec);
824 Status = AE_NO_HARDWARE_RESPONSE;
825 int need_poll = cold || rebooting || ec_polled_mode || sc->ec_suspending;
5ed44076 826 /*
10f97674
AP
827 * The main CPU should be much faster than the EC. So the status should
828 * be "not ready" when we start waiting. But if the main CPU is really
829 * slow, it's possible we see the current "ready" response. Since that
830 * can't be distinguished from the previous response in polled mode,
831 * this is a potential issue. We really should have interrupts enabled
832 * during boot so there is no ambiguity in polled mode.
833 *
834 * If this occurs, we add an additional delay before actually entering
835 * the status checking loop, hopefully to allow the EC to go to work
836 * and produce a non-stale status.
5ed44076 837 */
10f97674
AP
838 if (need_poll) {
839 static int once;
840
841 if (EcCheckStatus(sc, "pre-check", Event) == AE_OK) {
842 if (!once) {
843 device_printf(sc->ec_dev,
844 "warning: EC done before starting event wait\n");
845 once = 1;
846 }
847 AcpiOsStall(10);
5ed44076 848 }
5ed44076 849 }
5ed44076 850
10f97674
AP
851 /* Wait for event by polling or GPE (interrupt). */
852 if (need_poll) {
853 count = (ec_timeout * 1000) / EC_POLL_DELAY;
5895535b
YT
854 if (count == 0)
855 count = 1;
5895535b 856 for (i = 0; i < count; i++) {
10f97674
AP
857 Status = EcCheckStatus(sc, "poll", Event);
858 if (Status == AE_OK)
5ed44076 859 break;
10f97674
AP
860 AcpiOsStall(EC_POLL_DELAY);
861 }
862 } else {
863 slp_ival = hz / 1000;
864 if (slp_ival != 0) {
865 count = ec_timeout;
866 } else {
867 /* hz has less than 1 ms resolution so scale timeout. */
868 slp_ival = 1;
869 count = ec_timeout / (1000 / hz);
870 }
871
872 /*
873 * Wait for the GPE to signal the status changed, checking the
874 * status register each time we get one. It's possible to get a
875 * GPE for an event we're not interested in here (i.e., SCI for
876 * EC query).
877 */
878 for (i = 0; i < count; i++) {
879 if (gen_count != sc->ec_gencount) {
880 /*
881 * Record new generation count. It's possible the GPE was
882 * just to notify us that a query is needed and we need to
883 * wait for a second GPE to signal the completion of the
884 * event we are actually waiting for.
885 */
886 gen_count = sc->ec_gencount;
887 Status = EcCheckStatus(sc, "sleep", Event);
888 if (Status == AE_OK)
889 break;
5ed44076 890 }
10f97674 891 tsleep(&sc->ec_gencount, PZERO, "ecgpe", slp_ival);
5ed44076 892 }
5ed44076 893
10f97674
AP
894 /*
895 * We finished waiting for the GPE and it never arrived. Try to
896 * read the register once and trust whatever value we got. This is
897 * the best we can do at this point. Then, force polled mode on
898 * since this system doesn't appear to generate GPEs.
899 */
900 if (Status != AE_OK) {
901 Status = EcCheckStatus(sc, "sleep_end", Event);
902 device_printf(sc->ec_dev,
903 "wait timed out (%sresponse), forcing polled mode\n",
904 Status == AE_OK ? "" : "no ");
905 ec_polled_mode = TRUE;
906 }
5ed44076 907 }
10f97674
AP
908#if 0
909 if (Status != AE_OK)
910 CTR0(KTR_ACPI, "error: ec wait timed out");
911#endif
5ed44076 912 return (Status);
10f97674 913}
5ed44076
MD
914
915static ACPI_STATUS
916EcCommand(struct acpi_ec_softc *sc, EC_COMMAND cmd)
917{
10f97674
AP
918 ACPI_STATUS status;
919 EC_EVENT event;
920 EC_STATUS ec_status;
921 u_int gen_count;
5ed44076 922
10f97674
AP
923 ACPI_SERIAL_ASSERT(ec);
924
925 /* Don't use burst mode if user disabled it. */
926 if (!ec_burst_mode && cmd == EC_COMMAND_BURST_ENABLE)
927 return (AE_ERROR);
5ed44076
MD
928
929 /* Decide what to wait for based on command type. */
930 switch (cmd) {
931 case EC_COMMAND_READ:
932 case EC_COMMAND_WRITE:
933 case EC_COMMAND_BURST_DISABLE:
10f97674 934 event = EC_EVENT_INPUT_BUFFER_EMPTY;
5ed44076
MD
935 break;
936 case EC_COMMAND_QUERY:
937 case EC_COMMAND_BURST_ENABLE:
10f97674 938 event = EC_EVENT_OUTPUT_BUFFER_FULL;
5ed44076
MD
939 break;
940 default:
10f97674 941 device_printf(sc->ec_dev, "EcCommand: invalid command %#x\n", cmd);
5ed44076
MD
942 return (AE_BAD_PARAMETER);
943 }
944
945 /* Run the command and wait for the chosen event. */
10f97674
AP
946#if 0
947 CTR1(KTR_ACPI, "ec running command %#x", cmd);
948#endif
949 gen_count = sc->ec_gencount;
5ed44076 950 EC_SET_CSR(sc, cmd);
10f97674
AP
951 status = EcWaitEvent(sc, event, gen_count);
952 if (ACPI_SUCCESS(status)) {
953 /* If we succeeded, burst flag should now be present. */
954 if (cmd == EC_COMMAND_BURST_ENABLE) {
955 ec_status = EC_GET_CSR(sc);
956 if ((ec_status & EC_FLAG_BURST_MODE) == 0)
957 status = AE_ERROR;
958 }
959 } else
960 device_printf(sc->ec_dev, "EcCommand: no response to %#x\n", cmd);
961 return (status);
5ed44076
MD
962}
963
964static ACPI_STATUS
965EcRead(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
966{
10f97674
AP
967 ACPI_STATUS status;
968 UINT8 data;
969 u_int gen_count;
5ed44076 970
10f97674
AP
971 ACPI_SERIAL_ASSERT(ec);
972#if 0
973 CTR1(KTR_ACPI, "ec read from %#x", Address);
974#endif
5ed44076 975 /* If we can't start burst mode, continue anyway. */
10f97674
AP
976 status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
977 if (status == AE_OK) {
978 data = EC_GET_DATA(sc);
979 if (data == EC_BURST_ACK) {
980#if 0
981 CTR0(KTR_ACPI, "ec burst enabled");
5ed44076 982#endif
10f97674
AP
983 sc->ec_burstactive = TRUE;
984 }
985 }
5ed44076 986
10f97674
AP
987 status = EcCommand(sc, EC_COMMAND_READ);
988 if (ACPI_FAILURE(status))
989 return (status);
5ed44076 990
10f97674 991 gen_count = sc->ec_gencount;
5ed44076 992 EC_SET_DATA(sc, Address);
10f97674
AP
993 status = EcWaitEvent(sc, EC_EVENT_OUTPUT_BUFFER_FULL, gen_count);
994 if (ACPI_FAILURE(status)) {
995 device_printf(sc->ec_dev, "EcRead: failed waiting to get data\n");
996 return (status);
5ed44076 997 }
5ed44076
MD
998 *Data = EC_GET_DATA(sc);
999
5ed44076 1000 if (sc->ec_burstactive) {
10f97674
AP
1001 sc->ec_burstactive = FALSE;
1002 status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
1003 if (ACPI_FAILURE(status))
1004 return (status);
1005#if 0
1006 CTR0(KTR_ACPI, "ec disabled burst ok");
5ed44076 1007#endif
10f97674 1008 }
5ed44076
MD
1009
1010 return (AE_OK);
10f97674 1011}
5ed44076
MD
1012
1013static ACPI_STATUS
1014EcWrite(struct acpi_ec_softc *sc, UINT8 Address, UINT8 *Data)
1015{
10f97674
AP
1016 ACPI_STATUS status;
1017 UINT8 data;
1018 u_int gen_count;
5ed44076 1019
10f97674
AP
1020 ACPI_SERIAL_ASSERT(ec);
1021#if 0
1022 CTR2(KTR_ACPI, "ec write to %#x, data %#x", Address, *Data);
1023#endif
5ed44076 1024
5ed44076 1025 /* If we can't start burst mode, continue anyway. */
10f97674
AP
1026 status = EcCommand(sc, EC_COMMAND_BURST_ENABLE);
1027 if (status == AE_OK) {
1028 data = EC_GET_DATA(sc);
1029 if (data == EC_BURST_ACK) {
1030#if 0
1031 CTR0(KTR_ACPI, "ec burst enabled");
5ed44076 1032#endif
10f97674
AP
1033 sc->ec_burstactive = TRUE;
1034 }
1035 }
5ed44076 1036
10f97674
AP
1037 status = EcCommand(sc, EC_COMMAND_WRITE);
1038 if (ACPI_FAILURE(status))
1039 return (status);
5ed44076 1040
10f97674 1041 gen_count = sc->ec_gencount;
5ed44076 1042 EC_SET_DATA(sc, Address);
10f97674
AP
1043 status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, gen_count);
1044 if (ACPI_FAILURE(status)) {
1045 device_printf(sc->ec_dev, "EcRead: failed waiting for sent address\n");
1046 return (status);
5ed44076
MD
1047 }
1048
10f97674 1049 gen_count = sc->ec_gencount;
5ed44076 1050 EC_SET_DATA(sc, *Data);
10f97674
AP
1051 status = EcWaitEvent(sc, EC_EVENT_INPUT_BUFFER_EMPTY, gen_count);
1052 if (ACPI_FAILURE(status)) {
1053 device_printf(sc->ec_dev, "EcWrite: failed waiting for sent data\n");
1054 return (status);
5ed44076
MD
1055 }
1056
5ed44076 1057 if (sc->ec_burstactive) {
10f97674
AP
1058 sc->ec_burstactive = FALSE;
1059 status = EcCommand(sc, EC_COMMAND_BURST_DISABLE);
1060 if (ACPI_FAILURE(status))
1061 return (status);
1062#if 0
1063 CTR0(KTR_ACPI, "ec disabled burst ok");
5ed44076 1064#endif
10f97674 1065 }
5ed44076
MD
1066
1067 return (AE_OK);
1068}