source: svn/newcon3bcm2_21bu/nexus/modules/frontend/common/src/nexus_frontend_upstream.c

/***************************************************************************
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*  secrets of Broadcom, and you shall use all reasonable efforts to protect the confidentiality thereof,
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* $brcm_Workfile: nexus_frontend_upstream.c $
* $brcm_Revision: 2 $
* $brcm_Date: 1/23/09 3:32p $
*
* API Description:
*   API name: Frontend UpStream
*    Generic APIs for upstream tuner device control
*
* Revision History:
*
* $brcm_Log: /nexus/modules/frontend/common/src/nexus_frontend_upstream.c $
* 
* 2   1/23/09 3:32p jgarrett
* PR 51457: Adding frontend extension hooks for tuners and
*  frontends/demods
* 
* 1   1/18/08 2:19p jgarrett
* PR 38808: Merging to main branch
* 
* Nexus_Devel/1   10/5/07 5:52p jgarrett
* PR 35551: Adding initial version
* 
***************************************************************************/

#include "nexus_frontend_module.h"

BDBG_MODULE(nexus_frontend_upstream.c);

/***************************************************************************
Summary:
        Initialize an upstream settings structure to defaults
See Also:
    NEXUS_Frontend_TuneUpstream
 ***************************************************************************/
void NEXUS_Frontend_GetDefaultUpstreamSettings(
    NEXUS_FrontendUpstreamSettings *pSettings
    )
{
    BKNI_Memset(pSettings, 0, sizeof(*pSettings));
}

/***************************************************************************
Summary:
        Tune an upstream tuner
See Also:
    NEXUS_Frontend_InitUpstreamSettings
 ***************************************************************************/
NEXUS_Error NEXUS_Frontend_TuneUpstream(
    NEXUS_FrontendHandle handle,
    const NEXUS_FrontendUpstreamSettings *pSettings
    )
{
    BDBG_ASSERT(NULL != handle);
    BDBG_ASSERT(NULL != pSettings);

    if ( NULL == handle->tuneUpstream )
    {
        if ( handle->pParentFrontend )
        {
            return NEXUS_Frontend_TuneUpstream(handle->pParentFrontend, pSettings);
        }
        else
        {
            return BERR_TRACE(BERR_NOT_SUPPORTED);
        }
    }
    else
    {
        return handle->tuneUpstream(handle->pDeviceHandle, pSettings);
    }
}

/***************************************************************************
Summary:
        Get the current status of an upstream tuner
See Also:
    NEXUS_Frontend_TuneUpstream
 ***************************************************************************/
NEXUS_Error NEXUS_Frontend_GetUpstreamStatus(
    NEXUS_FrontendHandle handle,
    NEXUS_FrontendUpstreamStatus *pStatus
    )
{
    BDBG_ASSERT(NULL != handle);
    BDBG_ASSERT(NULL != pStatus);

    if ( NULL == handle->getUpstreamStatus )
    {
        if ( handle->pParentFrontend )
        {
            return NEXUS_Frontend_GetUpstreamStatus(handle->pParentFrontend, pStatus);
        }
        else
        {
            return BERR_TRACE(BERR_NOT_SUPPORTED);
        }
    }
    else
    {
        return handle->getUpstreamStatus(handle->pDeviceHandle, pStatus);
    }
}