Release 4.7 sound/pci/cs5535audio/cs5535audio_pm.c
/*
* Power management for audio on multifunction CS5535 companion device
* Copyright (C) Jaya Kumar
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <sound/asoundef.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include "cs5535audio.h"
static void snd_cs5535audio_stop_hardware(struct cs5535audio *cs5535au)
{
/*
we depend on snd_ac97_suspend to tell the
AC97 codec to shutdown. the amd spec suggests
that the LNK_SHUTDOWN be done at the same time
that the codec power-down is issued. instead,
we do it just after rather than at the same
time. excluding codec specific build_ops->suspend
ac97 powerdown hits:
0x8000 EAPD
0x4000 Headphone amplifier
0x0300 ADC & DAC
0x0400 Analog Mixer powerdown (Vref on)
I am not sure if this is the best that we can do.
The remainder to be investigated are:
- analog mixer (vref off) 0x0800
- AC-link powerdown 0x1000
- codec internal clock 0x2000
*/
/* set LNK_SHUTDOWN to shutdown AC link */
cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_SHUTDOWN);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaya kumar | jaya kumar | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static int snd_cs5535audio_suspend(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct cs5535audio *cs5535au = card->private_data;
int i;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(cs5535au->pcm);
snd_ac97_suspend(cs5535au->ac97);
for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
struct cs5535audio_dma *dma = &cs5535au->dmas[i];
if (dma && dma->substream)
dma->saved_prd = dma->ops->read_prd(cs5535au);
}
/* save important regs, then disable aclink in hw */
snd_cs5535audio_stop_hardware(cs5535au);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaya kumar | jaya kumar | 93 | 83.04% | 1 | 33.33% |
| andres salomon | andres salomon | 14 | 12.50% | 1 | 33.33% |
| takashi iwai | takashi iwai | 5 | 4.46% | 1 | 33.33% |
| Total | 112 | 100.00% | 3 | 100.00% |
static int snd_cs5535audio_resume(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct cs5535audio *cs5535au = card->private_data;
u32 tmp;
int timeout;
int i;
/* set LNK_WRM_RST to reset AC link */
cs_writel(cs5535au, ACC_CODEC_CNTL, ACC_CODEC_CNTL_LNK_WRM_RST);
timeout = 50;
do {
tmp = cs_readl(cs5535au, ACC_CODEC_STATUS);
if (tmp & PRM_RDY_STS)
break;
udelay(1);
} while (--timeout);
if (!timeout)
dev_err(cs5535au->card->dev, "Failure getting AC Link ready\n");
/* set up rate regs, dma. actual initiation is done in trig */
for (i = 0; i < NUM_CS5535AUDIO_DMAS; i++) {
struct cs5535audio_dma *dma = &cs5535au->dmas[i];
if (dma && dma->substream) {
dma->substream->ops->prepare(dma->substream);
dma->ops->setup_prd(cs5535au, dma->saved_prd);
}
}
/* we depend on ac97 to perform the codec power up */
snd_ac97_resume(cs5535au->ac97);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaya kumar | jaya kumar | 162 | 89.01% | 1 | 25.00% |
| takashi iwai | takashi iwai | 12 | 6.59% | 2 | 50.00% |
| andres salomon | andres salomon | 8 | 4.40% | 1 | 25.00% |
| Total | 182 | 100.00% | 4 | 100.00% |
SIMPLE_DEV_PM_OPS(snd_cs5535audio_pm, snd_cs5535audio_suspend, snd_cs5535audio_resume);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| jaya kumar | jaya kumar | 308 | 86.52% | 1 | 25.00% |
| takashi iwai | takashi iwai | 26 | 7.30% | 2 | 50.00% |
| andres salomon | andres salomon | 22 | 6.18% | 1 | 25.00% |
| Total | 356 | 100.00% | 4 | 100.00% |
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