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/*
* pwr.c
*
* 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.
*/
/*
* ======== PWR.c ========
* PWR API for controlling DSP power states.
*
* Public Functions:
* PWR_SleepDSP
* PWR_WakeDSP
*
*! Revision History
*! ================
*! 18-Feb-2003 vp Code review updates.
*! 18-Oct-2002 vp Ported to Linux platform.
*! 22-May-2002 sg Do PWR-to-IOCTL code mapping in PWR_SleepDSP.
*! 29-Apr-2002 sg Initial.
*/
/* ----------------------------------- Host OS */
#include <dspbridge/host_os.h>
/* ----------------------------------- This */
#include <dspbridge/pwr.h>
/* ----------------------------------- Resource Manager */
#include <dspbridge/devdefs.h>
#include <dspbridge/drv.h>
/* ----------------------------------- Platform Manager */
#include <dspbridge/dev.h>
/* ----------------------------------- Link Driver */
#include <dspbridge/wmdioctl.h>
/*
* ======== PWR_SleepDSP ========
* Send command to DSP to enter sleep state.
*/
DSP_STATUS PWR_SleepDSP(IN CONST u32 sleepCode, IN CONST u32 timeout)
{
struct WMD_DRV_INTERFACE *pIntfFxns;
struct WMD_DEV_CONTEXT *dwContext;
DSP_STATUS status = DSP_EFAIL;
struct DEV_OBJECT *hDevObject = NULL;
u32 ioctlcode = 0;
u32 arg = timeout;
for (hDevObject = (struct DEV_OBJECT *)DRV_GetFirstDevObject();
hDevObject != NULL;
hDevObject =
(struct DEV_OBJECT *)DRV_GetNextDevObject
((u32)hDevObject)) {
if (DSP_FAILED(DEV_GetWMDContext(hDevObject,
(struct WMD_DEV_CONTEXT **)&dwContext))) {
continue;
}
if (DSP_FAILED(DEV_GetIntfFxns(hDevObject,
(struct WMD_DRV_INTERFACE **)&pIntfFxns))) {
continue;
}
if (sleepCode == PWR_DEEPSLEEP)
ioctlcode = WMDIOCTL_DEEPSLEEP;
else if (sleepCode == PWR_EMERGENCYDEEPSLEEP)
ioctlcode = WMDIOCTL_EMERGENCYSLEEP;
else
status = DSP_EINVALIDARG;
if (status != DSP_EINVALIDARG) {
status = (*pIntfFxns->pfnDevCntrl)(dwContext,
ioctlcode, (void *)&arg);
}
}
return status;
}
/*
* ======== PWR_WakeDSP ========
* Send command to DSP to wake it from sleep.
*/
DSP_STATUS PWR_WakeDSP(IN CONST u32 timeout)
{
struct WMD_DRV_INTERFACE *pIntfFxns;
struct WMD_DEV_CONTEXT *dwContext;
DSP_STATUS status = DSP_EFAIL;
struct DEV_OBJECT *hDevObject = NULL;
u32 arg = timeout;
for (hDevObject = (struct DEV_OBJECT *)DRV_GetFirstDevObject();
hDevObject != NULL;
hDevObject = (struct DEV_OBJECT *)DRV_GetNextDevObject
((u32)hDevObject)) {
if (DSP_SUCCEEDED(DEV_GetWMDContext(hDevObject,
(struct WMD_DEV_CONTEXT **)&dwContext))) {
if (DSP_SUCCEEDED(DEV_GetIntfFxns(hDevObject,
(struct WMD_DRV_INTERFACE **)&pIntfFxns))) {
status = (*pIntfFxns->pfnDevCntrl)(dwContext,
WMDIOCTL_WAKEUP, (void *)&arg);
}
}
}
return status;
}
/*
* ======== PWR_PM_PreScale========
* Sends pre-notification message to DSP.
*/
DSP_STATUS PWR_PM_PreScale(IN u16 voltage_domain, u32 level)
{
struct WMD_DRV_INTERFACE *pIntfFxns;
struct WMD_DEV_CONTEXT *dwContext;
DSP_STATUS status = DSP_EFAIL;
struct DEV_OBJECT *hDevObject = NULL;
u32 arg[2];
arg[0] = voltage_domain;
arg[1] = level;
for (hDevObject = (struct DEV_OBJECT *)DRV_GetFirstDevObject();
hDevObject != NULL;
hDevObject = (struct DEV_OBJECT *)DRV_GetNextDevObject
((u32)hDevObject)) {
if (DSP_SUCCEEDED(DEV_GetWMDContext(hDevObject,
(struct WMD_DEV_CONTEXT **)&dwContext))) {
if (DSP_SUCCEEDED(DEV_GetIntfFxns(hDevObject,
(struct WMD_DRV_INTERFACE **)&pIntfFxns))) {
status = (*pIntfFxns->pfnDevCntrl)(dwContext,
WMDIOCTL_PRESCALE_NOTIFY,
(void *)&arg);
}
}
}
return status;
}
/*
* ======== PWR_PM_PostScale========
* Sends post-notification message to DSP.
*/
DSP_STATUS PWR_PM_PostScale(IN u16 voltage_domain, u32 level)
{
struct WMD_DRV_INTERFACE *pIntfFxns;
struct WMD_DEV_CONTEXT *dwContext;
DSP_STATUS status = DSP_EFAIL;
struct DEV_OBJECT *hDevObject = NULL;
u32 arg[2];
arg[0] = voltage_domain;
arg[1] = level;
for (hDevObject = (struct DEV_OBJECT *)DRV_GetFirstDevObject();
hDevObject != NULL;
hDevObject = (struct DEV_OBJECT *)DRV_GetNextDevObject
((u32)hDevObject)) {
if (DSP_SUCCEEDED(DEV_GetWMDContext(hDevObject,
(struct WMD_DEV_CONTEXT **)&dwContext))) {
if (DSP_SUCCEEDED(DEV_GetIntfFxns(hDevObject,
(struct WMD_DRV_INTERFACE **)&pIntfFxns))) {
status = (*pIntfFxns->pfnDevCntrl)(dwContext,
WMDIOCTL_POSTSCALE_NOTIFY,
(void *)&arg);
}
}
}
return status;
}
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