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/*
* pwr.h
*
* DSP-BIOS Bridge driver support functions for TI OMAP processors.
*
* Copyright (C) 2005-2006 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef PWR_
#define PWR_
#include <dspbridge/dbdefs.h>
#include <dspbridge/mbx_sh.h>
/* valid sleep command codes that can be sent by GPP via mailbox: */
#define PWR_DEEPSLEEP MBX_PM_DSPIDLE
#define PWR_EMERGENCYDEEPSLEEP MBX_PM_EMERGENCYSLEEP
#define PWR_WAKEUP MBX_PM_DSPWAKEUP
/*
* ======== pwr_sleep_dsp ========
* Signal the DSP to go to sleep.
*
* Parameters:
* sleep_code: New sleep state for DSP. (Initially, valid codes
* are PWR_DEEPSLEEP or PWR_EMERGENCYDEEPSLEEP; both of
* these codes will simply put the DSP in deep sleep.)
*
* timeout: Maximum time (msec) that PWR should wait for
* confirmation that the DSP sleep state has been
* reached. If PWR should simply send the command to
* the DSP to go to sleep and then return (i.e.,
* asynchrounous sleep), the timeout should be
* specified as zero.
*
* Returns:
* 0: Success.
* 0: Success, but the DSP was already asleep.
* -EINVAL: The specified sleep_code is not supported.
* -ETIME: A timeout occurred while waiting for DSP sleep
* confirmation.
* -EPERM: General failure, unable to send sleep command to
* the DSP.
*/
extern int pwr_sleep_dsp(const u32 sleep_code, const u32 timeout);
/*
* ======== pwr_wake_dsp ========
* Signal the DSP to wake from sleep.
*
* Parameters:
* timeout: Maximum time (msec) that PWR should wait for
* confirmation that the DSP is awake. If PWR should
* simply send a command to the DSP to wake and then
* return (i.e., asynchrounous wake), timeout should
* be specified as zero.
*
* Returns:
* 0: Success.
* 0: Success, but the DSP was already awake.
* -ETIME: A timeout occurred while waiting for wake
* confirmation.
* -EPERM: General failure, unable to send wake command to
* the DSP.
*/
extern int pwr_wake_dsp(const u32 timeout);
/*
* ======== pwr_pm_pre_scale ========
* Prescale notification to DSP.
*
* Parameters:
* voltage_domain: The voltage domain for which notification is sent
* level: The level of voltage domain
*
* Returns:
* 0: Success.
* 0: Success, but the DSP was already awake.
* -ETIME: A timeout occurred while waiting for wake
* confirmation.
* -EPERM: General failure, unable to send wake command to
* the DSP.
*/
extern int pwr_pm_pre_scale(u16 voltage_domain, u32 level);
/*
* ======== pwr_pm_post_scale ========
* PostScale notification to DSP.
*
* Parameters:
* voltage_domain: The voltage domain for which notification is sent
* level: The level of voltage domain
*
* Returns:
* 0: Success.
* 0: Success, but the DSP was already awake.
* -ETIME: A timeout occurred while waiting for wake
* confirmation.
* -EPERM: General failure, unable to send wake command to
* the DSP.
*/
extern int pwr_pm_post_scale(u16 voltage_domain, u32 level);
#endif /* PWR_ */
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