diff options
Diffstat (limited to 'drivers/acpi/namespace/nsxfname.c')
| -rw-r--r-- | drivers/acpi/namespace/nsxfname.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nsxfname.c b/drivers/acpi/namespace/nsxfname.c new file mode 100644 index 0000000..f2405ef --- /dev/null +++ b/drivers/acpi/namespace/nsxfname.c @@ -0,0 +1,369 @@ +/****************************************************************************** + * + * Module Name: nsxfname - Public interfaces to the ACPI subsystem + * ACPI Namespace oriented interfaces + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <linux/module.h> + +#include <acpi/acpi.h> +#include <acpi/acnamesp.h> + + +#define _COMPONENT ACPI_NAMESPACE + ACPI_MODULE_NAME ("nsxfname") + + +/****************************************************************************** + * + * FUNCTION: acpi_get_handle + * + * PARAMETERS: Parent - Object to search under (search scope). + * path_name - Pointer to an asciiz string containing the + * name + * ret_handle - Where the return handle is placed + * + * RETURN: Status + * + * DESCRIPTION: This routine will search for a caller specified name in the + * name space. The caller can restrict the search region by + * specifying a non NULL parent. The parent value is itself a + * namespace handle. + * + ******************************************************************************/ + +acpi_status +acpi_get_handle ( + acpi_handle parent, + acpi_string pathname, + acpi_handle *ret_handle) +{ + acpi_status status; + struct acpi_namespace_node *node = NULL; + struct acpi_namespace_node *prefix_node = NULL; + + + ACPI_FUNCTION_ENTRY (); + + + /* Parameter Validation */ + + if (!ret_handle || !pathname) { + return (AE_BAD_PARAMETER); + } + + /* Convert a parent handle to a prefix node */ + + if (parent) { + status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + return (status); + } + + prefix_node = acpi_ns_map_handle_to_node (parent); + if (!prefix_node) { + (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + return (AE_BAD_PARAMETER); + } + + status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + return (status); + } + } + + /* Special case for root, since we can't search for it */ + + if (ACPI_STRCMP (pathname, ACPI_NS_ROOT_PATH) == 0) { + *ret_handle = acpi_ns_convert_entry_to_handle (acpi_gbl_root_node); + return (AE_OK); + } + + /* + * Find the Node and convert to a handle + */ + status = acpi_ns_get_node_by_path (pathname, prefix_node, ACPI_NS_NO_UPSEARCH, + &node); + + *ret_handle = NULL; + if (ACPI_SUCCESS (status)) { + *ret_handle = acpi_ns_convert_entry_to_handle (node); + } + + return (status); +} +EXPORT_SYMBOL(acpi_get_handle); + + +/****************************************************************************** + * + * FUNCTION: acpi_get_name + * + * PARAMETERS: Handle - Handle to be converted to a pathname + * name_type - Full pathname or single segment + * Buffer - Buffer for returned path + * + * RETURN: Pointer to a string containing the fully qualified Name. + * + * DESCRIPTION: This routine returns the fully qualified name associated with + * the Handle parameter. This and the acpi_pathname_to_handle are + * complementary functions. + * + ******************************************************************************/ + +acpi_status +acpi_get_name ( + acpi_handle handle, + u32 name_type, + struct acpi_buffer *buffer) +{ + acpi_status status; + struct acpi_namespace_node *node; + + + /* Parameter validation */ + + if (name_type > ACPI_NAME_TYPE_MAX) { + return (AE_BAD_PARAMETER); + } + + status = acpi_ut_validate_buffer (buffer); + if (ACPI_FAILURE (status)) { + return (status); + } + + if (name_type == ACPI_FULL_PATHNAME) { + /* Get the full pathname (From the namespace root) */ + + status = acpi_ns_handle_to_pathname (handle, buffer); + return (status); + } + + /* + * Wants the single segment ACPI name. + * Validate handle and convert to a namespace Node + */ + status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + return (status); + } + + node = acpi_ns_map_handle_to_node (handle); + if (!node) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer (buffer, ACPI_PATH_SEGMENT_LENGTH); + if (ACPI_FAILURE (status)) { + goto unlock_and_exit; + } + + /* Just copy the ACPI name from the Node and zero terminate it */ + + ACPI_STRNCPY (buffer->pointer, acpi_ut_get_node_name (node), + ACPI_NAME_SIZE); + ((char *) buffer->pointer) [ACPI_NAME_SIZE] = 0; + status = AE_OK; + + +unlock_and_exit: + + (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + return (status); +} +EXPORT_SYMBOL(acpi_get_name); + + +/****************************************************************************** + * + * FUNCTION: acpi_get_object_info + * + * PARAMETERS: Handle - Object Handle + * Info - Where the info is returned + * + * RETURN: Status + * + * DESCRIPTION: Returns information about an object as gleaned from the + * namespace node and possibly by running several standard + * control methods (Such as in the case of a device.) + * + ******************************************************************************/ + +acpi_status +acpi_get_object_info ( + acpi_handle handle, + struct acpi_buffer *buffer) +{ + acpi_status status; + struct acpi_namespace_node *node; + struct acpi_device_info *info; + struct acpi_device_info *return_info; + struct acpi_compatible_id_list *cid_list = NULL; + acpi_size size; + + + /* Parameter validation */ + + if (!handle || !buffer) { + return (AE_BAD_PARAMETER); + } + + status = acpi_ut_validate_buffer (buffer); + if (ACPI_FAILURE (status)) { + return (status); + } + + info = ACPI_MEM_CALLOCATE (sizeof (struct acpi_device_info)); + if (!info) { + return (AE_NO_MEMORY); + } + + status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + node = acpi_ns_map_handle_to_node (handle); + if (!node) { + (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + goto cleanup; + } + + /* Init return structure */ + + size = sizeof (struct acpi_device_info); + + info->type = node->type; + info->name = node->name.integer; + info->valid = 0; + + status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* If not a device, we are all done */ + + if (info->type == ACPI_TYPE_DEVICE) { + /* + * Get extra info for ACPI Devices objects only: + * Run the Device _HID, _UID, _CID, _STA, _ADR and _sx_d methods. + * + * Note: none of these methods are required, so they may or may + * not be present for this device. The Info->Valid bitfield is used + * to indicate which methods were found and ran successfully. + */ + + /* Execute the Device._HID method */ + + status = acpi_ut_execute_HID (node, &info->hardware_id); + if (ACPI_SUCCESS (status)) { + info->valid |= ACPI_VALID_HID; + } + + /* Execute the Device._UID method */ + + status = acpi_ut_execute_UID (node, &info->unique_id); + if (ACPI_SUCCESS (status)) { + info->valid |= ACPI_VALID_UID; + } + + /* Execute the Device._CID method */ + + status = acpi_ut_execute_CID (node, &cid_list); + if (ACPI_SUCCESS (status)) { + size += ((acpi_size) cid_list->count - 1) * + sizeof (struct acpi_compatible_id); + info->valid |= ACPI_VALID_CID; + } + + /* Execute the Device._STA method */ + + status = acpi_ut_execute_STA (node, &info->current_status); + if (ACPI_SUCCESS (status)) { + info->valid |= ACPI_VALID_STA; + } + + /* Execute the Device._ADR method */ + + status = acpi_ut_evaluate_numeric_object (METHOD_NAME__ADR, node, + &info->address); + if (ACPI_SUCCESS (status)) { + info->valid |= ACPI_VALID_ADR; + } + + /* Execute the Device._sx_d methods */ + + status = acpi_ut_execute_sxds (node, info->highest_dstates); + if (ACPI_SUCCESS (status)) { + info->valid |= ACPI_VALID_SXDS; + } + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer (buffer, size); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* Populate the return buffer */ + + return_info = buffer->pointer; + ACPI_MEMCPY (return_info, info, sizeof (struct acpi_device_info)); + + if (cid_list) { + ACPI_MEMCPY (&return_info->compatibility_id, cid_list, cid_list->size); + } + + +cleanup: + ACPI_MEM_FREE (info); + if (cid_list) { + ACPI_MEM_FREE (cid_list); + } + return (status); +} +EXPORT_SYMBOL(acpi_get_object_info); + |
