/*
 * 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);
/pdaudiocf/pdaudiocf.h?h=nds-private-remove&amp;id=e69e46261063a25c3907bed16a2e9d18b115d1fd'>pdaudiocf.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/pcmcia/pdaudiocf/pdaudiocf.h?h=nds-private-remove&amp;id=e69e46261063a25c3907bed16a2e9d18b115d1fd&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
ue='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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 19:36:04 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-06 19:36:04 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=8b1b41ee74f9712c355d66dc105bbea663ae0afd'>8b1b41ee74f9712c355d66dc105bbea663ae0afd</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/musb/am35x.c?id=8b1b41ee74f9712c355d66dc105bbea663ae0afd'>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=8b1b41ee74f9712c355d66dc105bbea663ae0afd'>4c3f410f3cb01c7b00b474e376a60f27a7ff99a8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=8b1b41ee74f9712c355d66dc105bbea663ae0afd'>drivers/usb/musb/am35x.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=f7d6040aa45df6ffd9e891114125dc919f18b96b'>f7d6040aa45df6ffd9e891114125dc919f18b96b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=8b1b41ee74f9712c355d66dc105bbea663ae0afd&amp;id2=f7d6040aa45df6ffd9e891114125dc919f18b96b'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=bfb34527a32a1a576d9bfb7026d3ab0369a6cd60'>bfb34527a32a1a576d9bfb7026d3ab0369a6cd60</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/musb/am35x.c?h=nds-private-remove&amp;id=8b1b41ee74f9712c355d66dc105bbea663ae0afd&amp;id2=bfb34527a32a1a576d9bfb7026d3ab0369a6cd60'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm</div><div class='commit-msg'>Pull libnvdimm fixes from Dan Williams:
 "None of these are showstoppers for 4.10 and could wait for 4.11 merge
  window, but they are low enough risk for this late in the cycle and
  the fixes have waiting users . They have received a build success
  notification from the 0day robot, pass the latest ndctl unit tests,
  and appeared in next:

   - Fix a crash that can result when SIGINT is sent to a process that
     is awaiting completion of an address range scrub command. We were
     not properly cleaning up the workqueue after
     wait_event_interruptible().

   - Fix a memory hotplug failure condition that results from not
     reserving enough space out of persistent memory for the memmap. By
     default we align to 2M allocations that the memory hotplug code
     assumes, but if the administrator specifies a non-default
     4K-alignment then we can fail to correctly size the reservation.

   - A one line fix to improve the predictability of libnvdimm block
     device names. A common operation is to reconfigure /dev/pmem0 into
     a different mode. For example, a reconfiguration might set a new
     mode that reserves some of the capacity for a struct page memmap
     array. It surprises users if the device name changes to
     "/dev/pmem0.1" after the mode change and then back to /dev/pmem0
     after a reboot.

   - Add 'const' to some function pointer tables"

* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm, pfn: fix memmap reservation size versus 4K alignment
  acpi, nfit: fix acpi_nfit_flush_probe() crash
  libnvdimm, namespace: do not delete namespace-id 0
  nvdimm: constify device_type structures
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=8b1b41ee74f9712c355d66dc105bbea663ae0afd'>Diffstat</a> (limited to 'drivers/usb/musb/am35x.c')</div><table summary='diffstat' class='diffstat'>