patch-2.4.0-prerelease linux/drivers/acpi/namespace/nsinit.c

• Lines: 272
• Date: Fri Dec 29 14:07:21 2000
• Orig file: v2.4.0-test12/linux/drivers/acpi/namespace/nsinit.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test12/linux/drivers/acpi/namespace/nsinit.c linux/drivers/acpi/namespace/nsinit.c
@@ -0,0 +1,271 @@
+/******************************************************************************
+ *
+ * Module Name: nsinit - namespace initialization
+ *              $Revision: 9 $
+ *
+ *****************************************************************************/
+
+/*
+ *  Copyright (C) 2000 R. Byron Moore
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include "acpi.h"
+#include "acnamesp.h"
+#include "acdispat.h"
+
+#define _COMPONENT          NAMESPACE
+	 MODULE_NAME         ("nsinit")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ns_initialize_objects
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Walk the entire namespace and perform any necessary
+ *              initialization on the objects found therein
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ns_initialize_objects (
+	void)
+{
+	ACPI_STATUS             status;
+	ACPI_INIT_WALK_INFO     info;
+
+
+	info.field_count = 0;
+	info.field_init = 0;
+	info.op_region_count = 0;
+	info.op_region_init = 0;
+	info.object_count = 0;
+
+
+	/* Walk entire namespace from the supplied root */
+
+	status = acpi_walk_namespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
+			  ACPI_UINT32_MAX, acpi_ns_init_one_object,
+			  &info, NULL);
+
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ns_initialize_devices
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      ACPI_STATUS
+ *
+ * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
+ *              This means running _INI on all present devices.
+ *
+ *              Also: Install PCI config space handler for all PCI root bridges.
+ *              A PCI root bridge is found by searching for devices containing
+ *              a HID with the value EISAID("PNP0A03")
+ *
+ *****************************************************************************/
+
+ACPI_STATUS
+acpi_ns_initialize_devices (
+	u32                     flags)
+{
+	ACPI_STATUS             status;
+	ACPI_DEVICE_WALK_INFO   info;
+
+
+	info.flags = flags;
+	info.device_count = 0;
+	info.num_STA = 0;
+	info.num_INI = 0;
+
+
+	status = acpi_ns_walk_namespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
+			   FALSE, acpi_ns_init_one_device, &info, NULL);
+
+
+
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    Acpi_ns_init_one_object
+ *
+ * PARAMETERS:  Obj_handle      - Node
+ *              Level           - Current nesting level
+ *              Context         - Points to a init info struct
+ *              Return_value    - Not used
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Callback from Acpi_walk_namespace. Invoked for every object
+ *              within the  namespace.
+ *
+ *              Currently, the only objects that require initialization are:
+ *              1) Methods
+ *              2) Op Regions
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+acpi_ns_init_one_object (
+	ACPI_HANDLE             obj_handle,
+	u32                     level,
+	void                    *context,
+	void                    **return_value)
+{
+	OBJECT_TYPE_INTERNAL    type;
+	ACPI_STATUS             status;
+	ACPI_INIT_WALK_INFO     *info = (ACPI_INIT_WALK_INFO *) context;
+	ACPI_NAMESPACE_NODE     *node = (ACPI_NAMESPACE_NODE *) obj_handle;
+	ACPI_OPERAND_OBJECT     *obj_desc;
+
+
+	info->object_count++;
+
+
+	/* And even then, we are only interested in a few object types */
+
+	type = acpi_ns_get_type (obj_handle);
+	obj_desc = node->object;
+	if (!obj_desc) {
+		return (AE_OK);
+	}
+
+	switch (type)
+	{
+
+	case ACPI_TYPE_REGION:
+
+		info->op_region_count++;
+		if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
+			break;
+		}
+
+		info->op_region_init++;
+		status = acpi_ds_get_region_arguments (obj_desc);
+
+		break;
+
+
+	case ACPI_TYPE_FIELD_UNIT:
+
+		info->field_count++;
+		if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
+			break;
+		}
+
+		info->field_init++;
+		status = acpi_ds_get_field_unit_arguments (obj_desc);
+		break;
+
+	default:
+		break;
+	}
+
+	/*
+	 * We ignore errors from above, and always return OK, since
+	 * we don't want to abort the walk on a single error.
+	 */
+	return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    Acpi_ns_init_one_device
+ *
+ * PARAMETERS:  The usual "I'm a namespace callback" stuff
+ *
+ * RETURN:      ACPI_STATUS
+ *
+ * DESCRIPTION: This is called once per device soon after ACPI is enabled
+ *              to initialize each device. It determines if the device is
+ *              present, and if so, calls _INI.
+ *
+ *****************************************************************************/
+
+ACPI_STATUS
+acpi_ns_init_one_device (
+	ACPI_HANDLE             obj_handle,
+	u32                     nesting_level,
+	void                    *context,
+	void                    **return_value)
+{
+	ACPI_STATUS             status;
+	ACPI_NAMESPACE_NODE    *node;
+	u32                     flags;
+	ACPI_DEVICE_WALK_INFO  *info = (ACPI_DEVICE_WALK_INFO *) context;
+
+
+	info->device_count++;
+
+	acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
+
+	node = acpi_ns_convert_handle_to_entry (obj_handle);
+	if (!node) {
+		acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
+		return (AE_BAD_PARAMETER);
+	}
+
+	acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
+
+	/*
+	 * Run _STA to determine if we can run _INI on the device.
+	 */
+
+	status = acpi_cm_execute_STA (node, &flags);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	info->num_STA++;
+
+	if (!(flags & 0x01)) {
+		/* don't look at children of a not present device */
+		return(AE_CTRL_DEPTH);
+	}
+
+	/*
+	 * The device is present. Run _INI.
+	 */
+
+	status = acpi_ns_evaluate_relative (obj_handle, "_INI", NULL, NULL);
+	if (AE_NOT_FOUND == status) {
+		/* No _INI means device requires no initialization */
+		status = AE_OK;
+	}
+
+	else if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	else {
+		info->num_INI++;
+	}
+
+	return (status);
+}