blob: 2ec2c7f4bb1b275caed48c2f5e65c87bd3737757 [file] [log] [blame]
/* arch/arm/mach-msm/htc_pwrsink.c
*
* Copyright (C) 2008 HTC Corporation
* Copyright (C) 2008 Google, Inc.
* Author: San Mehat <san@google.com>
* Kant Kang <kant_kang@htc.com>
* Eiven Peng <eiven_peng@htc.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/earlysuspend.h>
#include <mach/msm_smd.h>
#include <mach/htc_pwrsink.h>
#include "smd_private.h"
enum {
PWRSINK_DEBUG_CURR_CHANGE = 1U << 0,
PWRSINK_DEBUG_CURR_CHANGE_AUDIO = 1U << 1,
};
static int pwrsink_debug_mask;
module_param_named(debug_mask, pwrsink_debug_mask, int,
S_IRUGO | S_IWUSR | S_IWGRP);
static int initialized;
static unsigned audio_path = 1; /* HTC_SND_DEVICE_SPEAKER = 1 */
static struct pwr_sink_audio audio_sink_array[PWRSINK_AUDIO_LAST + 1];
static struct pwr_sink *sink_array[PWRSINK_LAST + 1];
static DEFINE_SPINLOCK(sink_lock);
static DEFINE_SPINLOCK(audio_sink_lock);
static unsigned long total_sink;
static uint32_t *smem_total_sink;
int htc_pwrsink_set(pwrsink_id_type id, unsigned percent_utilized)
{
unsigned long flags;
if (!smem_total_sink)
smem_total_sink = smem_alloc(SMEM_ID_VENDOR0, sizeof(uint32_t));
if (!initialized)
return -EAGAIN;
if (id < 0 || id > PWRSINK_LAST)
return -EINVAL;
spin_lock_irqsave(&sink_lock, flags);
if (!sink_array[id]) {
spin_unlock_irqrestore(&sink_lock, flags);
return -ENOENT;
}
if (sink_array[id]->percent_util == percent_utilized) {
spin_unlock_irqrestore(&sink_lock, flags);
return 0;
}
total_sink -= (sink_array[id]->ua_max *
sink_array[id]->percent_util / 100);
sink_array[id]->percent_util = percent_utilized;
total_sink += (sink_array[id]->ua_max *
sink_array[id]->percent_util / 100);
if (smem_total_sink)
*smem_total_sink = total_sink / 1000;
pr_debug("htc_pwrsink: ID %d, Util %d%%, Total %lu uA %s\n",
id, percent_utilized, total_sink,
smem_total_sink ? "SET" : "");
spin_unlock_irqrestore(&sink_lock, flags);
return 0;
}
EXPORT_SYMBOL(htc_pwrsink_set);
static void compute_audio_current(void)
{
/* unsigned long flags; */
unsigned max_percent = 0;
int i, active_audio_sinks = 0;
pwrsink_audio_id_type last_active_audio_sink = 0;
/* Make sure this segment will be spinlocked
before computing by calling function. */
/* spin_lock_irqsave(&audio_sink_lock, flags); */
for (i = 0; i <= PWRSINK_AUDIO_LAST; ++i) {
max_percent = (audio_sink_array[i].percent > max_percent) ?
audio_sink_array[i].percent : max_percent;
if (audio_sink_array[i].percent > 0) {
active_audio_sinks++;
last_active_audio_sink = i;
}
}
if (active_audio_sinks == 0)
htc_pwrsink_set(PWRSINK_AUDIO, 0);
else if (active_audio_sinks == 1) {
pwrsink_audio_id_type laas = last_active_audio_sink;
/* TODO: add volume and routing path current. */
if (audio_path == 1) /* Speaker */
htc_pwrsink_set(PWRSINK_AUDIO,
audio_sink_array[laas].percent);
else
htc_pwrsink_set(PWRSINK_AUDIO,
audio_sink_array[laas].percent * 9 / 10);
} else if (active_audio_sinks > 1) {
/* TODO: add volume and routing path current. */
if (audio_path == 1) /* Speaker */
htc_pwrsink_set(PWRSINK_AUDIO, max_percent);
else
htc_pwrsink_set(PWRSINK_AUDIO, max_percent * 9 / 10);
}
/* spin_unlock_irqrestore(&audio_sink_lock, flags); */
if (pwrsink_debug_mask & PWRSINK_DEBUG_CURR_CHANGE_AUDIO)
pr_info("%s: active_audio_sinks=%d, audio_path=%d\n", __func__,
active_audio_sinks, audio_path);
}
int htc_pwrsink_audio_set(pwrsink_audio_id_type id, unsigned percent_utilized)
{
unsigned long flags;
if (id < 0 || id > PWRSINK_AUDIO_LAST)
return -EINVAL;
if (pwrsink_debug_mask & PWRSINK_DEBUG_CURR_CHANGE_AUDIO)
pr_info("%s: id=%d, percent=%d, percent_old=%d\n", __func__,
id, percent_utilized, audio_sink_array[id].percent);
spin_lock_irqsave(&audio_sink_lock, flags);
if (audio_sink_array[id].percent == percent_utilized) {
spin_unlock_irqrestore(&audio_sink_lock, flags);
return 0;
}
audio_sink_array[id].percent = percent_utilized;
spin_unlock_irqrestore(&audio_sink_lock, flags);
compute_audio_current();
return 0;
}
EXPORT_SYMBOL(htc_pwrsink_audio_set);
int htc_pwrsink_audio_volume_set(pwrsink_audio_id_type id, unsigned volume)
{
unsigned long flags;
if (id < 0 || id > PWRSINK_AUDIO_LAST)
return -EINVAL;
if (pwrsink_debug_mask & PWRSINK_DEBUG_CURR_CHANGE_AUDIO)
pr_info("%s: id=%d, volume=%d, volume_old=%d\n", __func__,
id, volume, audio_sink_array[id].volume);
spin_lock_irqsave(&audio_sink_lock, flags);
if (audio_sink_array[id].volume == volume) {
spin_unlock_irqrestore(&audio_sink_lock, flags);
return 0;
}
audio_sink_array[id].volume = volume;
spin_unlock_irqrestore(&audio_sink_lock, flags);
compute_audio_current();
return 0;
}
EXPORT_SYMBOL(htc_pwrsink_audio_volume_set);
int htc_pwrsink_audio_path_set(unsigned path)
{
unsigned long flags;
if (pwrsink_debug_mask & PWRSINK_DEBUG_CURR_CHANGE_AUDIO)
pr_info("%s: path=%d, path_old=%d\n",
__func__, path, audio_path);
spin_lock_irqsave(&audio_sink_lock, flags);
if (audio_path == path) {
spin_unlock_irqrestore(&audio_sink_lock, flags);
return 0;
}
audio_path = path;
spin_unlock_irqrestore(&audio_sink_lock, flags);
compute_audio_current();
return 0;
}
EXPORT_SYMBOL(htc_pwrsink_audio_path_set);
void htc_pwrsink_suspend_early(struct early_suspend *h)
{
htc_pwrsink_set(PWRSINK_SYSTEM_LOAD, 70);
}
int htc_pwrsink_suspend_late(struct platform_device *pdev, pm_message_t state)
{
struct pwr_sink_platform_data *pdata = pdev->dev.platform_data;
if (pdata && pdata->suspend_late)
pdata->suspend_late(pdev, state);
else
htc_pwrsink_set(PWRSINK_SYSTEM_LOAD, 13);
return 0;
}
int htc_pwrsink_resume_early(struct platform_device *pdev)
{
struct pwr_sink_platform_data *pdata = pdev->dev.platform_data;
if (pdata && pdata->resume_early)
pdata->resume_early(pdev);
else
htc_pwrsink_set(PWRSINK_SYSTEM_LOAD, 70);
return 0;
}
void htc_pwrsink_resume_late(struct early_suspend *h)
{
htc_pwrsink_set(PWRSINK_SYSTEM_LOAD, 100);
}
struct early_suspend htc_pwrsink_early_suspend = {
.level = EARLY_SUSPEND_LEVEL_DISABLE_FB + 1,
.suspend = htc_pwrsink_suspend_early,
.resume = htc_pwrsink_resume_late,
};
static int __init htc_pwrsink_probe(struct platform_device *pdev)
{
struct pwr_sink_platform_data *pdata = pdev->dev.platform_data;
int i;
if (!pdata)
return -EINVAL;
total_sink = 0;
for (i = 0; i < pdata->num_sinks; i++) {
sink_array[pdata->sinks[i].id] = &pdata->sinks[i];
total_sink += (pdata->sinks[i].ua_max *
pdata->sinks[i].percent_util / 100);
}
initialized = 1;
if (pdata->suspend_early)
htc_pwrsink_early_suspend.suspend = pdata->suspend_early;
if (pdata->resume_late)
htc_pwrsink_early_suspend.resume = pdata->resume_late;
register_early_suspend(&htc_pwrsink_early_suspend);
return 0;
}
static struct platform_driver htc_pwrsink_driver = {
.probe = htc_pwrsink_probe,
.suspend_late = htc_pwrsink_suspend_late,
.resume_early = htc_pwrsink_resume_early,
.driver = {
.name = "htc_pwrsink",
.owner = THIS_MODULE,
},
};
static int __init htc_pwrsink_init(void)
{
initialized = 0;
memset(sink_array, 0, sizeof(sink_array));
return platform_driver_register(&htc_pwrsink_driver);
}
module_init(htc_pwrsink_init);