source: svn/newcon3bcm2_21bu/magnum/basemodules/chp/bchp_pwr.h @ 43

/***************************************************************************
*     (c)2007-2010 Broadcom Corporation
*  
*  This program is the proprietary software of Broadcom Corporation and/or its licensors,
*  and may only be used, duplicated, modified or distributed pursuant to the terms and
*  conditions of a separate, written license agreement executed between you and Broadcom
*  (an "Authorized License").  Except as set forth in an Authorized License, Broadcom grants
*  no license (express or implied), right to use, or waiver of any kind with respect to the
*  Software, and Broadcom expressly reserves all rights in and to the Software and all
*  intellectual property rights therein.  IF YOU HAVE NO AUTHORIZED LICENSE, THEN YOU
*  HAVE NO RIGHT TO USE THIS SOFTWARE IN ANY WAY, AND SHOULD IMMEDIATELY
*  NOTIFY BROADCOM AND DISCONTINUE ALL USE OF THE SOFTWARE.  
*   
*  Except as expressly set forth in the Authorized License,
*   
*  1.     This program, including its structure, sequence and organization, constitutes the valuable trade
*  secrets of Broadcom, and you shall use all reasonable efforts to protect the confidentiality thereof,
*  and to use this information only in connection with your use of Broadcom integrated circuit products.
*   
*  2.     TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" 
*  AND WITH ALL FAULTS AND BROADCOM MAKES NO PROMISES, REPRESENTATIONS OR 
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*  3.     TO THE MAXIMUM EXTENT PERMITTED BY LAW, IN NO EVENT SHALL BROADCOM OR ITS 
*  LICENSORS BE LIABLE FOR (i) CONSEQUENTIAL, INCIDENTAL, SPECIAL, INDIRECT, OR 
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* 
* $brcm_Workfile: bchp_pwr.h $
* $brcm_Revision: Hydra_Software_Devel/13 $
* $brcm_Date: 12/12/11 2:12p $
*
* Module Description:
*
* Revision History:
*
* $brcm_Log: /magnum/basemodules/chp/bchp_pwr.h $
* 
* Hydra_Software_Devel/13   12/12/11 2:12p jtna
* SW7425-1708: add BCHP_PWR_Standby/Resume() for clockgen power down
* 
* Hydra_Software_Devel/12   2/9/11 2:35p jtna
* SW7420-1456: remove _isr functions
* 
* Hydra_Software_Devel/11   2/3/11 7:19p jtna
* SW7420-1456: added _isr functions
* 
* Hydra_Software_Devel/10   11/18/10 7:34p jtna
* SW7420-972: refactor init process
* 
* Hydra_Software_Devel/9   9/17/10 5:53p jtna
* SW7420-972: update comments
* 
* Hydra_Software_Devel/8   9/9/10 5:02p jtna
* SW7420-972: replace BCHP_CHIP==7420 with BCHP_PWR_SUPPORT. this is now
* the magnum global define
* 
* Hydra_Software_Devel/7   9/8/10 4:07p jtna
* SW7420-972: conditionally include bchp_pwr_resources.h
* 
* Hydra_Software_Devel/6   9/8/10 3:44p jtna
* SW7420-972: bchp_pwr.h now includes bchp_pwr_resources.h
* 
* Hydra_Software_Devel/5   9/1/10 3:34p jtna
* SW7420-972: add bchp_pwr resource init scheme
* 
* Hydra_Software_Devel/4   8/13/10 5:27p jtna
* SW7405-4433: changed node representation from pointer to #define
* uint32_t
* 
* Hydra_Software_Devel/3   6/9/10 3:34p jtna
* SW7405-4433: add breg handle to bchp handle and don't require a breg
* handle to be passed to the pwr functions
* 
* Hydra_Software_Devel/2   6/8/10 6:55p jtna
* SW7405-4433: extended refcnt functionality and added basic dump
* function
* 
* Hydra_Software_Devel/1   6/1/10 7:32p jtna
* SW7405-4433: added bchp_pwr files
* 
***************************************************************************/

#ifndef BCHP_PWR_H__
#define BCHP_PWR_H__

#include "bchp.h"
#include "bchp_priv.h"
#ifdef BCHP_PWR_SUPPORT
#include "bchp_pwr_resources.h" /* platform-specific resources file */
#endif

#ifdef __cplusplus
extern "C" {
#endif

/***************************************************************************
Summary:
        Power resource identifier.

Description:
        Power resources are chip-specific abstractions that are defined in 
        bchp_pwr_resources.h. A power resource is identified by a single
        uint32_t number.
        
**************************************************************************/
typedef uint32_t BCHP_PWR_ResourceId;


/***************************************************************************
Summary:
        Acquire a power resource.

Description:
        This function acquires a single power resource.  You can only acquire 
        high-level, non-HW power resources.

        Acquiring a power resource causes the internal reference count for 
        the resource and all its successive dependants to increase by one.
        The dependent HW clocks turn on only when the internal reference
        count is increased from 0 to 1.

        The same power resource can be acquired multiple times.

See Also:
        BCHP_PWR_Resource_Release
**************************************************************************/
BERR_Code BCHP_PWR_AcquireResource(BCHP_Handle handle, BCHP_PWR_ResourceId resourceId);


/***************************************************************************
Summary:
        Release a power resource.

Description:
        This function releases a single power resource. You can only release 
        high-level, non-HW power resources. Furthermore, you can only release
        power resources that were previously explicitly acquired.

        Releasing a power resource causes the internal reference count for
        the resource and all its successive dependants to decrease by one. 
        The dependent HW clocks turn off only when the internal reference
        count becomes zero.

        The same power resource can be released as many times as it was 
        previously acquired.

See Also:
        BCHP_PWR_Resource_Acquire
**************************************************************************/
BERR_Code BCHP_PWR_ReleaseResource(BCHP_Handle handle, BCHP_PWR_ResourceId resourceId);


/***************************************************************************
Summary:
        Initialize all HW power resources so that they can be acquired and released.

Description:
        A HW resource must be initialized before it is allowed to be acquired and
        released. An initialized HW resource is one that is powered down and has 
        a reference count of 0.

        During BCHP_PWR_Open, HW resources associated with the special 
        BCHP_PWR_RESOURCE_MAGNUM_CONTROLLED node are automatically
        initialized. Calling this function initializes the rest.

**************************************************************************/
void BCHP_PWR_InitAllHwResources(BCHP_Handle handle);


/***************************************************************************
Summary:
        Print current power status.

Description:
        This function prints which power resources are powered up and down, 
        and their current reference counts. This is used to debug power usage
        across the system, and is functionally equivalent to looking for 
        memory leaks.

        When a power resource is acquired, the "public" reference count is 
        increased only for that particular resource. The "private" reference
        count, on the other hand, is increased for all its successive 
        dependants.
        
**************************************************************************/
void BCHP_PWR_Dump(BCHP_Handle handle);


/***************************************************************************
Summary:
        Standby settings.

Description:
        Currently unused.
**************************************************************************/
typedef struct BCHP_PWR_StandbySettings {
    unsigned unused; /* dummy placeholder */
} BCHP_PWR_StandbySettings;


/***************************************************************************
Summary:
        Enter standby.

Description:
        This function causes the BCHP_PWR sub-module to enter standby.
        Currently, this function is a no-op; it does not change any SW 
        reference counts or HW state.
**************************************************************************/
BERR_Code BCHP_PWR_Standby(
    BCHP_Handle handle,
    const BCHP_PWR_StandbySettings *pSettings /* optional */
    );


/***************************************************************************
Summary:
        Exit standby.

Description:
        This function causes BCHP_PWR to exit standby by re-applying the HW state.

        A power management operation such as passive standby can cause the HW
        to lose state, while the SW state remains unchanged. This results in a 
        mismatch between the SW reference counts and the HW state.

        Calling this function causes BCHP_PWR to re-apply the HW state based on 
        the current SW reference counts, thereby synchronizing the two states
        again.
**************************************************************************/
void BCHP_PWR_Resume(
    BCHP_Handle handle
    );

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif