1/*-
2 * Copyright (c) 2001 Michael Smith
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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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
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi_powerres.c 128047 2004-04-09 06:55:50Z njl $");
29
30#include "opt_acpi.h"
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/malloc.h>
34#include <sys/bus.h>
35
36#include "acpi.h"

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92};
93
94static TAILQ_HEAD(acpi_powerresource_list, acpi_powerresource)
95 acpi_powerresources;
96static TAILQ_HEAD(acpi_powerconsumer_list, acpi_powerconsumer)
97 acpi_powerconsumers;
98
99static ACPI_STATUS acpi_pwr_register_consumer(ACPI_HANDLE consumer);
100static ACPI_STATUS acpi_pwr_deregister_consumer(ACPI_HANDLE consumer);
101static ACPI_STATUS acpi_pwr_register_resource(ACPI_HANDLE res);
102static ACPI_STATUS acpi_pwr_deregister_resource(ACPI_HANDLE res);
103static void acpi_pwr_reference_resource(ACPI_OBJECT *obj,
104 void *arg);
105static ACPI_STATUS acpi_pwr_switch_power(void);
106static struct acpi_powerresource
107 *acpi_pwr_find_resource(ACPI_HANDLE res);
108static struct acpi_powerconsumer
109 *acpi_pwr_find_consumer(ACPI_HANDLE consumer);
110

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186 out:
187 if (buf.Pointer != NULL)
188 AcpiOsFree(buf.Pointer);
189 if (ACPI_FAILURE(status) && rp != NULL)
190 free(rp, M_ACPIPWR);
191 return_ACPI_STATUS (status);
192}
193
194/*
195 * Deregister a power resource.
196 */
197static ACPI_STATUS
198acpi_pwr_deregister_resource(ACPI_HANDLE res)
199{
200 struct acpi_powerresource *rp;
201

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215 TAILQ_REMOVE(&acpi_powerresources, rp, ap_link);
216 free(rp, M_ACPIPWR);
217
218 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power resource %s\n",
219 acpi_name(res)));
220
221 return_ACPI_STATUS (AE_OK);
222}
223
224/*
225 * Register a power consumer.
226 *
227 * It's OK to call this if we already know about the consumer.
228 */
229static ACPI_STATUS
230acpi_pwr_register_consumer(ACPI_HANDLE consumer)

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248 pc->ac_state = ACPI_STATE_UNKNOWN;
249
250 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "registered power consumer %s\n",
251 acpi_name(consumer)));
252
253 return_ACPI_STATUS (AE_OK);
254}
255
256/*
257 * Deregister a power consumer.
258 *
259 * This should only be done once the consumer has been powered off.
260 * (XXX is this correct? Check once implemented)
261 */
262static ACPI_STATUS
263acpi_pwr_deregister_consumer(ACPI_HANDLE consumer)

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277 /* Pull the consumer off the list and free it */
278 TAILQ_REMOVE(&acpi_powerconsumers, pc, ac_link);
279
280 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "deregistered power consumer %s\n",
281 acpi_name(consumer)));
282
283 return_ACPI_STATUS (AE_OK);
284}
285
286/*
287 * Set a power consumer to a particular power state.
288 */
289ACPI_STATUS
290acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state)
291{
292 struct acpi_powerconsumer *pc;

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