patch-2.4.22 linux-2.4.22/drivers/acpi/ospm/busmgr/bmpm.c

• Lines: 443
• Date: 1969-12-31 16:00:00.000000000 -0800
• Orig file: linux-2.4.21/drivers/acpi/ospm/busmgr/bmpm.c
• Orig date: 2001-09-23 09:42:32.000000000 -0700

diff -urN linux-2.4.21/drivers/acpi/ospm/busmgr/bmpm.c linux-2.4.22/drivers/acpi/ospm/busmgr/bmpm.c
@@ -1,442 +0,0 @@
-/*****************************************************************************
- *
- * Module Name: bmpm.c
- *   $Revision: 14 $
- *
- *****************************************************************************/
-
-/*
- *  Copyright (C) 2000, 2001 Andrew Grover
- *
- *  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 "bm.h"
-#include "bmpower.h"
-
-
-#define _COMPONENT		ACPI_BUS
-	MODULE_NAME		("bmpm")
-
-
-/****************************************************************************
- *                             Internal Functions
- ****************************************************************************/
-
-/****************************************************************************
- *
- * FUNCTION:    bm_get_inferred_power_state
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
-
-acpi_status
-bm_get_inferred_power_state (
-	BM_DEVICE               *device)
-{
-	acpi_status             status = AE_OK;
-	BM_HANDLE_LIST          pr_list;
-	BM_POWER_STATE          list_state = ACPI_STATE_UNKNOWN;
-	char                    object_name[5] = {'_','P','R','0','\0'};
-	u32                     i = 0;
-
-	FUNCTION_TRACE("bm_get_inferred_power_state");
-
-	if (!device) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
-	}
-
-	MEMSET(&pr_list, 0, sizeof(BM_HANDLE_LIST));
-
-	device->power.state = ACPI_STATE_D3;
-
-	/*
-	 * Calculate Power State:
-	 * ----------------------
-	 * Try to infer the devices's power state by checking the state of
-	 * the devices's power resources.  We start by evaluating _PR0
-	 * (resource requirements at D0) and work through _PR1 and _PR2.
-	 * We know the current devices power state when all resources (for
-	 * a give Dx state) are ON.  If no power resources are on then the
-	 * device is assumed to be off (D3).
-	 */
-	for (i=ACPI_STATE_D0; i<ACPI_STATE_D3; i++) {
-
-		object_name[3] = '0' + i;
-
-		status = bm_evaluate_reference_list(device->acpi_handle,
-			object_name, &pr_list);
-
-		if (ACPI_SUCCESS(status)) {
-
-			status = bm_pr_list_get_state(&pr_list, &list_state);
-
-			if (ACPI_SUCCESS(status)) {
-
-				if (list_state == ACPI_STATE_D0) {
-					device->power.state = i;
-					break;
-				}
-			}
-		}
-	}
-
-	return_ACPI_STATUS(AE_OK);
-}
-
-
-/****************************************************************************
- *                             External Functions
- ****************************************************************************/
-
-/****************************************************************************
- *
- * FUNCTION:    bm_get_power_state
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
-
-acpi_status
-bm_get_power_state (
-	BM_NODE			*node)
-{
-	acpi_status             status = AE_OK;
-	BM_DEVICE               *device = NULL;
-
-	FUNCTION_TRACE("bm_get_power_state");
-
-	if (!node || !node->parent) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
-	}
-
-	device = &(node->device);
-
-	device->power.state = ACPI_STATE_UNKNOWN;
-
-	/*
-	 * Power Control?
-	 * --------------
-	 * If this device isn't directly power manageable (e.g. doesn't
-	 * include _PR0/_PS0) then there's nothing to do (state is static).
-	 */
-	if (!BM_IS_POWER_CONTROL(device)) {
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	/*
-	 * Parent Present?
-	 * ---------------
-	 * Make sure the parent is present before mucking with the child.
-	 */
-	if (!BM_NODE_PRESENT(node->parent)) {
-		return_ACPI_STATUS(AE_NOT_EXIST);
-	}
-	
-	/*
-	 * Get Power State:
-	 * ----------------
-	 * Either directly (via _PSC) or inferred (via power resource
-	 * dependencies).
-	 */
-	if (BM_IS_POWER_STATE(device)) {
-		status = bm_evaluate_simple_integer(device->acpi_handle,
-			"_PSC", &(device->power.state));
-	}
-	else {
-		status = bm_get_inferred_power_state(device);
-	}
-
-	if (ACPI_SUCCESS(status)) {
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Device [%02x] is at power state [D%d].\n", device->handle, device->power.state));
-	}
-	else {
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Error getting power state for device [%02x]\n", device->handle));
-	}
-
-	return_ACPI_STATUS(status);
-}
-
-
-/****************************************************************************
- *
- * FUNCTION:    bm_set_power_state
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
-
-acpi_status
-bm_set_power_state (
-	BM_NODE			*node,
-	BM_POWER_STATE          state)
-{
-	acpi_status             status = AE_OK;
-	BM_DEVICE		*device = NULL;
-	BM_DEVICE		*parent_device = NULL;
-	BM_HANDLE_LIST          current_list;
-	BM_HANDLE_LIST          target_list;
-	char                    object_name[5] = {'_','P','R','0','\0'};
-
-	FUNCTION_TRACE("bm_set_power_state");
-
-	if (!node || !node->parent || (state > ACPI_STATE_D3)) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
-	}
-
-	MEMSET(&current_list, 0, sizeof(BM_HANDLE_LIST));
-	MEMSET(&target_list, 0, sizeof(BM_HANDLE_LIST));
-
-	device = &(node->device);
-	parent_device = &(node->parent->device);
-
-	/*
-	 * Power Control?
-	 * --------------
-	 * If this device isn't directly power manageable (e.g. doesn't
-	 * include _PR0/_PS0) then return an error (can't set state).
-	 */
-	if (!BM_IS_POWER_CONTROL(device)) {
-		return_ACPI_STATUS(AE_ERROR);
-	}
-
-	/*
-	 * Parent Present?
-	 * ---------------
-	 * Make sure the parent is present before mucking with the child.
-	 */
-	if (!BM_NODE_PRESENT(node->parent)) {
-		return_ACPI_STATUS(AE_NOT_EXIST);
-	}
-	
-	/*
-	 * Check Parent's Power State:
-	 * ---------------------------
-	 * Can't be in a higher power state (lower Dx value) than parent.
-	 */
-	if (state < parent_device->power.state) {
-		ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Cannot set device [%02x] to a higher-powered state than parent_device.\n", device->handle));
-		return_ACPI_STATUS(AE_ERROR);
-	}
-
-	/*
-	 * Get Resources:
-	 * --------------
-	 * Get the power resources associated with the device's current
-	 * and target power states.
-	 */
-	if (device->power.state != ACPI_STATE_UNKNOWN) {
-		object_name[3] = '0' + device->power.state;
-		bm_evaluate_reference_list(device->acpi_handle,
-			object_name, &current_list);
-	}
-
-	object_name[3] = '0' + state;
-	bm_evaluate_reference_list(device->acpi_handle, object_name,
-		&target_list);
-
-	/*
-	 * Transition Resources:
-	 * ---------------------
-	 * Transition all power resources referenced by this device to
-	 * the correct power state (taking into consideration sequencing
-	 * and dependencies to other devices).
-	 */
-	if (current_list.count || target_list.count) {
-		status = bm_pr_list_transition(&current_list, &target_list);
-	}
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	/*
-	 * Execute _PSx:
-	 * -------------
-	 * Execute the _PSx method corresponding to the target Dx state,
-	 * if it exists.
-	 */
-	object_name[2] = 'S';
-	object_name[3] = '0' + state;
-	bm_evaluate_object(device->acpi_handle, object_name, NULL, NULL);
-
-	if (ACPI_SUCCESS(status)) {
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Device [%02x] is now at [D%d].\n", device->handle, state));
-		device->power.state = state;
-	}
-
-	return_ACPI_STATUS(status);
-}
-
-
-/****************************************************************************
- *
- * FUNCTION:    bm_get_pm_capabilities
- *
- * PARAMETERS:
- *
- * RETURN:
- *
- * DESCRIPTION:
- *
- ****************************************************************************/
-
-acpi_status
-bm_get_pm_capabilities (
-	BM_NODE			*node)
-{
-	acpi_status             status = AE_OK;
-	BM_DEVICE		*device = NULL;
-	BM_DEVICE		*parent_device = NULL;
-	acpi_handle             acpi_handle = NULL;
-	BM_POWER_STATE          dx_supported = ACPI_STATE_UNKNOWN;
-	char                    object_name[5] = {'_','S','0','D','\0'};
-	u32                     i = 0;
-
-	FUNCTION_TRACE("bm_get_pm_capabilities");
-
-	if (!node || !node->parent) {
-		return_ACPI_STATUS(AE_BAD_PARAMETER);
-	}
-
-	device = &(node->device);
-	parent_device = &(node->parent->device);
-
-	/*
-	 * Power Management Flags:
-	 * -----------------------
-	 */
-	if (ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PSC",
-		&acpi_handle))) {
-		device->power.flags |= BM_FLAGS_POWER_STATE;
-	}
-
-	if (ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_IRC",
-		&acpi_handle))) {
-		device->power.flags |= BM_FLAGS_INRUSH_CURRENT;
-	}
-
-	if (ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PRW",
-		&acpi_handle))) {
-		device->power.flags |= BM_FLAGS_WAKE_CAPABLE;
-	}
-
-	/*
-	 * Device Power State:
-	 * -------------------
-	 * Note that we can't get the device's power state until we've
-	 * initialized all power resources, so for now we just set to
-	 * unknown.
-	 */
-	device->power.state = ACPI_STATE_UNKNOWN;
-
-	/*
-	 * Dx Supported in S0:
-	 * -------------------
-	 * Figure out which Dx states are supported by this device for the
-	 * S0 (working) state.  Note that D0 and D3 are required (assumed).
-	 */
-	device->power.dx_supported[ACPI_STATE_S0] = BM_FLAGS_D0_SUPPORT |
-		BM_FLAGS_D3_SUPPORT;
-
-	if ((ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PR1",
-		&acpi_handle))) ||
-		(ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PS1",
-		&acpi_handle)))) {
-		device->power.dx_supported[ACPI_STATE_S0] |=
-			BM_FLAGS_D1_SUPPORT;
-	}
-
-	if ((ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PR2",
-		&acpi_handle))) ||
-		(ACPI_SUCCESS(acpi_get_handle(device->acpi_handle, "_PS2",
-		&acpi_handle)))) {
-		device->power.dx_supported[ACPI_STATE_S0] |=
-			BM_FLAGS_D2_SUPPORT;
-	}
-
-	/*
-	 * Dx Supported in S1-S5:
-	 * ----------------------
-	 * Figure out which Dx states are supported by this device for
-	 * all other Sx states.
-	 */
-	for (i = ACPI_STATE_S1; i <= ACPI_STATE_S5; i++) {
-
-		/*
-		 * D3 support is assumed (off is always possible!).
-		 */
-		device->power.dx_supported[i] = BM_FLAGS_D3_SUPPORT;
-
-		/*
-		 * Evalute _Sx_d:
-		 * -------------
-		 * Which returns the highest (power) Dx state supported in
-		 * this system (Sx) state.  We convert this value to a bit
-		 * mask of supported states (conceptually simpler).
-		 */
-		status = bm_evaluate_simple_integer(device->acpi_handle,
-			object_name, &dx_supported);
-		if (ACPI_SUCCESS(status)) {
-			switch (dx_supported) {
-			case 0:
-				device->power.dx_supported[i] |=
-					BM_FLAGS_D0_SUPPORT;
-				/* fall through */
-			case 1:
-				device->power.dx_supported[i] |=
-					BM_FLAGS_D1_SUPPORT;
-				/* fall through */
-			case 2:
-				device->power.dx_supported[i] |=
-					BM_FLAGS_D2_SUPPORT;
-				/* fall through */
-			case 3:
-				device->power.dx_supported[i] |=
-					BM_FLAGS_D3_SUPPORT;
-				break;
-			}
-
-			/*
-			 * Validate:
-			 * ---------
-			 * Mask of any states that _Sx_d falsely advertises
-			 * (e.g.claims D1 support but neither _PR2 or _PS2
-			 * exist).  In other words, S1-S5 can't offer a Dx
-			 * state that isn't supported by S0.
-			 */
-			device->power.dx_supported[i] &=
-				device->power.dx_supported[ACPI_STATE_S0];
-		}
-
-		object_name[2]++;
-	}
-
-	return_ACPI_STATUS(AE_OK);
-}