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-rw-r--r--nuttx/drivers/power/pm_update.c334
1 files changed, 0 insertions, 334 deletions
diff --git a/nuttx/drivers/power/pm_update.c b/nuttx/drivers/power/pm_update.c
deleted file mode 100644
index 4b6b58c55..000000000
--- a/nuttx/drivers/power/pm_update.c
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@@ -1,334 +0,0 @@
-/****************************************************************************
- * drivers/power/pm_update.c
- *
- * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <assert.h>
-
-#include <nuttx/power/pm.h>
-#include <nuttx/wqueue.h>
-
-#include "pm_internal.h"
-
-#ifdef CONFIG_PM
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-/* CONFIG_PM_MEMORY is the total number of time slices (including the current
- * time slice. The histor or previous values is then CONFIG_PM_MEMORY-1.
- */
-
-#if CONFIG_PM_MEMORY > 1
-static const int16_t g_pmcoeffs[CONFIG_PM_MEMORY-1] =
-{
- CONFIG_PM_COEF1
-#if CONFIG_PM_MEMORY > 2
- , CONFIG_PM_COEF2
-#endif
-#if CONFIG_PM_MEMORY > 3
- , CONFIG_PM_COEF3
-#endif
-#if CONFIG_PM_MEMORY > 4
- , CONFIG_PM_COEF4
-#endif
-#if CONFIG_PM_MEMORY > 5
- , CONFIG_PM_COEF5
-#endif
-#if CONFIG_PM_MEMORY > 6
-# warning "This logic needs to be extended"
-#endif
-};
-#endif
-
-/* Threshold activity values to enter into the next lower power consumption
- * state. Indexing is next state 0:IDLE, 1:STANDBY, 2:SLEEP.
- */
-
-static const int16_t g_pmenterthresh[3] =
-{
- CONFIG_PM_IDLEENTER_THRESH,
- CONFIG_PM_STANDBYENTER_THRESH,
- CONFIG_PM_SLEEPENTER_THRESH
-};
-
-/* Threshold activity values to leave the current low power consdumption
- * state. Indexing is current state 0:IDLE, 1: STANDBY, 2: SLEEP.
- */
-
-static const int16_t g_pmexitthresh[3] =
-{
- CONFIG_PM_IDLEEXIT_THRESH,
- CONFIG_PM_STANDBYEXIT_THRESH,
- CONFIG_PM_SLEEPEXIT_THRESH
-};
-
-/* Threshold time slice count to enter the next low power consdumption
- * state. Indexing is next state 0:IDLE, 1: STANDBY, 2: SLEEP.
- */
-
-static const uint16_t g_pmcount[3] =
-{
- CONFIG_PM_IDLEENTER_COUNT,
- CONFIG_PM_STANDBYENTER_COUNT,
- CONFIG_PM_SLEEPENTER_COUNT
-};
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: pm_worker
- *
- * Description:
- * This worker function is queue at the end of a time slice in order to
- * update driver activity metrics and recommended states.
- *
- * Input Parameters:
- * arg - The value of the activity accumulator at the end of the time
- * slice.
- *
- * Returned Value:
- * None.
- *
- * Assumptions:
- * This function runs on the worker thread.
- *
- ****************************************************************************/
-
-void pm_worker(FAR void *arg)
-{
- int16_t accum = (int16_t)((intptr_t)arg);
- int32_t Y;
- int index;
-
-#if CONFIG_PM_MEMORY > 1
- int32_t denom;
- int i, j;
-
- /* We won't bother to do anything until we have accumulated
- * CONFIG_PM_MEMORY-1 samples.
- */
-
- if (g_pmglobals.mcnt < CONFIG_PM_MEMORY-1)
- {
- g_pmglobals.memory[g_pmglobals.mcnt] = accum;
- g_pmglobals.mcnt++;
- return;
- }
-
- /* The averaging algorithm is simply: Y = (An*X + SUM(Ai*Yi))/SUM(Aj), where
- * i = 1..n-1 and j= 1..n, n is the length of the "memory", Ai is the
- * weight applied to each value, and X is the current activity.
- *
- * CONFIG_PM_MEMORY provides the memory for the algorithm. Default: 2
- * CONFIG_PM_COEFn provides weight for each sample. Default: 1
- *
- * First, calclate Y = An*X
- */
-
- Y = CONFIG_PM_COEFN * accum;
- denom = CONFIG_PM_COEFN;
-
- /* Then calculate Y += SUM(Ai*Yi), i = 1..n-1. The oldest sample will
- * reside at g_pmglobals.mndx (and this is the value that we will overwrite
- * with the new value).
- */
-
- for (i = 0, j = g_pmglobals.mndx; i < CONFIG_PM_MEMORY-1; i++, j++)
- {
- if (j >= CONFIG_PM_MEMORY-1)
- {
- j = 0;
- }
-
- Y += g_pmcoeffs[i] * g_pmglobals.memory[j];
- denom += g_pmcoeffs[i];
- }
-
- /* Compute and save the new activity value */
-
- Y /= denom;
- g_pmglobals.memory[g_pmglobals.mndx] = Y;
- g_pmglobals.mndx++;
- if (g_pmglobals.mndx >= CONFIG_PM_MEMORY-1)
- {
- g_pmglobals.mndx = 0;
- }
-
-#else
-
- /* No smoothing */
-
- Y = accum;
-
-#endif
-
- /* First check if increased activity should cause us to return to the
- * normal operating state. This would be unlikely for the lowest power
- * consumption states because the CPU is probably asleep. However this
- * probably does apply for the IDLE state.
- */
-
- if (g_pmglobals.state > PM_NORMAL)
- {
- /* Get the table index for the current state (which will be the
- * current state minus one)
- */
-
- index = g_pmglobals.state - 1;
-
- /* Has the threshold to return to normal power consumption state been
- * exceeded?
- */
-
- if (Y > g_pmexitthresh[index])
- {
- /* Yes... reset the count and recommend the normal state. */
-
- g_pmglobals.thrcnt = 0;
- g_pmglobals.recommended = PM_NORMAL;
- return;
- }
- }
-
- /* Now, compare this new activity level to the thresholds and counts for
- * the next lower power consumption state. If we are already in the SLEEP
- * state, then there is nothing more to be done (in fact, I would be
- * surprised to be executing!).
- */
-
- if (g_pmglobals.state < PM_SLEEP)
- {
- unsigned int nextstate;
-
- /* Get the next state and the table index for the next state (which will
- * be the current state)
- */
-
- index = g_pmglobals.state;
- nextstate = g_pmglobals.state + 1;
-
- /* Has the threshold to enter the next lower power consumption state
- * been exceeded?
- */
-
- if (Y > g_pmenterthresh[index])
- {
- /* No... reset the count and recommend the current state */
-
- g_pmglobals.thrcnt = 0;
- g_pmglobals.recommended = g_pmglobals.state;
- }
-
- /* Yes.. have we already recommended this state? If so, do nothing */
-
- else if (g_pmglobals.recommended < nextstate)
- {
- /* No.. increment the count. Has is passed the the count required
- * for a state transition?
- */
-
- if (++g_pmglobals.thrcnt >= g_pmcount[index])
- {
- /* Yes, recommend the new state and set up for the next
- * transition.
- */
-
- g_pmglobals.thrcnt = 0;
- g_pmglobals.recommended = nextstate;
- }
- }
- }
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: pm_update
- *
- * Description:
- * This internal function is called at the end of a time slice in order to
- * update driver activity metrics and recommended states.
- *
- * Input Parameters:
- * accum - The value of the activity accumulator at the end of the time
- * slice.
- *
- * Returned Value:
- * None.
- *
- * Assumptions:
- * This function may be called from a driver, perhaps even at the interrupt
- * level. It may also be called from the IDLE loop at the lowest possible
- * priority level. To reconcile these various conditions, all work is
- * performed on the worker thread at a user-selectable priority. This will
- * also serialize all of the updates and eliminate any need for additional
- * protection.
- *
- ****************************************************************************/
-
-void pm_update(int16_t accum)
-{
- /* The work will be performed on the worker thread */
-
- DEBUGASSERT(g_pmglobals.work.worker == NULL);
- (void)work_queue(HPWORK, &g_pmglobals.work, pm_worker, (FAR void*)((intptr_t)accum), 0);
-}
-
-#endif /* CONFIG_PM */
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