[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / acpi / acpica / evxfregn.c
blob7c3d2d356ffba4877227cc2c340b7d3d1d62dc9c
1 /******************************************************************************
3 * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
4 * Address Spaces.
6 *****************************************************************************/
8 /*
9 * Copyright (C) 2000 - 2008, Intel Corp.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
45 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acnamesp.h"
48 #include "acevents.h"
50 #define _COMPONENT ACPI_EVENTS
51 ACPI_MODULE_NAME("evxfregn")
53 /*******************************************************************************
55 * FUNCTION: acpi_install_address_space_handler
57 * PARAMETERS: Device - Handle for the device
58 * space_id - The address space ID
59 * Handler - Address of the handler
60 * Setup - Address of the setup function
61 * Context - Value passed to the handler on each access
63 * RETURN: Status
65 * DESCRIPTION: Install a handler for all op_regions of a given space_id.
67 ******************************************************************************/
68 acpi_status
69 acpi_install_address_space_handler(acpi_handle device,
70 acpi_adr_space_type space_id,
71 acpi_adr_space_handler handler,
72 acpi_adr_space_setup setup, void *context)
74 struct acpi_namespace_node *node;
75 acpi_status status;
77 ACPI_FUNCTION_TRACE(acpi_install_address_space_handler);
79 /* Parameter validation */
81 if (!device) {
82 return_ACPI_STATUS(AE_BAD_PARAMETER);
85 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
86 if (ACPI_FAILURE(status)) {
87 return_ACPI_STATUS(status);
90 /* Convert and validate the device handle */
92 node = acpi_ns_map_handle_to_node(device);
93 if (!node) {
94 status = AE_BAD_PARAMETER;
95 goto unlock_and_exit;
98 /* Install the handler for all Regions for this Space ID */
100 status =
101 acpi_ev_install_space_handler(node, space_id, handler, setup,
102 context);
103 if (ACPI_FAILURE(status)) {
104 goto unlock_and_exit;
107 /* Run all _REG methods for this address space */
109 status = acpi_ev_execute_reg_methods(node, space_id);
111 unlock_and_exit:
112 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
113 return_ACPI_STATUS(status);
116 ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler)
118 /*******************************************************************************
120 * FUNCTION: acpi_remove_address_space_handler
122 * PARAMETERS: Device - Handle for the device
123 * space_id - The address space ID
124 * Handler - Address of the handler
126 * RETURN: Status
128 * DESCRIPTION: Remove a previously installed handler.
130 ******************************************************************************/
131 acpi_status
132 acpi_remove_address_space_handler(acpi_handle device,
133 acpi_adr_space_type space_id,
134 acpi_adr_space_handler handler)
136 union acpi_operand_object *obj_desc;
137 union acpi_operand_object *handler_obj;
138 union acpi_operand_object *region_obj;
139 union acpi_operand_object **last_obj_ptr;
140 struct acpi_namespace_node *node;
141 acpi_status status;
143 ACPI_FUNCTION_TRACE(acpi_remove_address_space_handler);
145 /* Parameter validation */
147 if (!device) {
148 return_ACPI_STATUS(AE_BAD_PARAMETER);
151 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
152 if (ACPI_FAILURE(status)) {
153 return_ACPI_STATUS(status);
156 /* Convert and validate the device handle */
158 node = acpi_ns_map_handle_to_node(device);
159 if (!node ||
160 ((node->type != ACPI_TYPE_DEVICE) &&
161 (node->type != ACPI_TYPE_PROCESSOR) &&
162 (node->type != ACPI_TYPE_THERMAL) &&
163 (node != acpi_gbl_root_node))) {
164 status = AE_BAD_PARAMETER;
165 goto unlock_and_exit;
168 /* Make sure the internal object exists */
170 obj_desc = acpi_ns_get_attached_object(node);
171 if (!obj_desc) {
172 status = AE_NOT_EXIST;
173 goto unlock_and_exit;
176 /* Find the address handler the user requested */
178 handler_obj = obj_desc->device.handler;
179 last_obj_ptr = &obj_desc->device.handler;
180 while (handler_obj) {
182 /* We have a handler, see if user requested this one */
184 if (handler_obj->address_space.space_id == space_id) {
186 /* Handler must be the same as the installed handler */
188 if (handler_obj->address_space.handler != handler) {
189 status = AE_BAD_PARAMETER;
190 goto unlock_and_exit;
193 /* Matched space_id, first dereference this in the Regions */
195 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
196 "Removing address handler %p(%p) for region %s "
197 "on Device %p(%p)\n",
198 handler_obj, handler,
199 acpi_ut_get_region_name(space_id),
200 node, obj_desc));
202 region_obj = handler_obj->address_space.region_list;
204 /* Walk the handler's region list */
206 while (region_obj) {
208 * First disassociate the handler from the region.
210 * NOTE: this doesn't mean that the region goes away
211 * The region is just inaccessible as indicated to
212 * the _REG method
214 acpi_ev_detach_region(region_obj, TRUE);
217 * Walk the list: Just grab the head because the
218 * detach_region removed the previous head.
220 region_obj =
221 handler_obj->address_space.region_list;
225 /* Remove this Handler object from the list */
227 *last_obj_ptr = handler_obj->address_space.next;
229 /* Now we can delete the handler object */
231 acpi_ut_remove_reference(handler_obj);
232 goto unlock_and_exit;
235 /* Walk the linked list of handlers */
237 last_obj_ptr = &handler_obj->address_space.next;
238 handler_obj = handler_obj->address_space.next;
241 /* The handler does not exist */
243 ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
244 "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
245 handler, acpi_ut_get_region_name(space_id), space_id,
246 node, obj_desc));
248 status = AE_NOT_EXIST;
250 unlock_and_exit:
251 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
252 return_ACPI_STATUS(status);
255 ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler)