/*
 * 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);

}

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;
}

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;
}

SIMPLE_DEV_PM_OPS(snd_cs5535audio_pm, snd_cs5535audio_suspend, snd_cs5535audio_resume);
cpupower/utils?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>utils</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='0becc0ae5b42828785b589f686725ff5bc3b9b25'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 09:37:34 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 21:47:58 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/power/cpupower/utils?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>0becc0ae5b42828785b589f686725ff5bc3b9b25</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/power/cpupower/utils?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>be6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/power/cpupower/utils?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>tools/power/cpupower/utils</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/power/cpupower/utils?h=nds-private-remove&amp;id=24c2503255d35c269b67162c397a1a1c1e02f6ce'>24c2503255d35c269b67162c397a1a1c1e02f6ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/power/cpupower/utils?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25&amp;id2=24c2503255d35c269b67162c397a1a1c1e02f6ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/mce: Make timer handling more robust</div><div class='commit-msg'>Erik reported that on a preproduction hardware a CMCI storm triggers the
BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is
started by the CMCI logic before the MCE CPU hotplug callback starts the
timer with add_timer_on(). So the timer is already queued which triggers
the BUG.

Using add_timer_on() is pretty pointless in this code because the timer is
strictlty per CPU, initialized as pinned and all operations which arm the
timer happen on the CPU to which the timer belongs.

Simplify the whole machinery by using mod_timer() instead of add_timer_on()
which avoids the problem because mod_timer() can handle already queued
timers. Use __start_timer() everywhere so the earliest armed expiry time is
preserved.

Reported-by: Erik Veijola &lt;erik.veijola@intel.com&gt;
Tested-by: Borislav Petkov &lt;bp@alien8.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Reviewed-by: Borislav Petkov &lt;bp@alien8.de&gt;
Cc: Tony Luck &lt;tony.luck@intel.com&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>Diffstat</a> (limited to 'tools/power/cpupower/utils')</div><table summary='diffstat' class='diffstat'>