summaryrefslogtreecommitdiff
path: root/sound/soc/au1x/psc.h
blob: 74dffeb641fa78855f62c75ba8b8524786aa1028 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
/*
 * Alchemy ALSA ASoC audio support.
 *
 * (c) 2007-2011 MSC Vertriebsges.m.b.H.,
 *	Manuel Lauss <manuel.lauss@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef _AU1X_PCM_H
#define _AU1X_PCM_H

struct au1xpsc_audio_data {
	void __iomem *mmio;

	unsigned long cfg;
	unsigned long rate;

	struct snd_soc_dai_driver dai_drv;

	unsigned long pm[2];
	struct mutex lock;
	int dmaids[2];
};

/* easy access macros */
#define PSC_CTRL(x)	((x)->mmio + PSC_CTRL_OFFSET)
#define PSC_SEL(x)	((x)->mmio + PSC_SEL_OFFSET)
#define I2S_STAT(x)	((x)->mmio + PSC_I2SSTAT_OFFSET)
#define I2S_CFG(x)	((x)->mmio + PSC_I2SCFG_OFFSET)
#define I2S_PCR(x)	((x)->mmio + PSC_I2SPCR_OFFSET)
#define AC97_CFG(x)	((x)->mmio + PSC_AC97CFG_OFFSET)
#define AC97_CDC(x)	((x)->mmio + PSC_AC97CDC_OFFSET)
#define AC97_EVNT(x)	((x)->mmio + PSC_AC97EVNT_OFFSET)
#define AC97_PCR(x)	((x)->mmio + PSC_AC97PCR_OFFSET)
#define AC97_RST(x)	((x)->mmio + PSC_AC97RST_OFFSET)
#define AC97_STAT(x)	((x)->mmio + PSC_AC97STAT_OFFSET)

#endif
aengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected"). That fix however caused a new regression where we can get error -115 messages with USB on BeagleBone when connecting a USB mass storage device to a hub. This is because when connecting a USB mass storage device to a hub, the initial DMA transfers can take over 200ms to complete and cppi41 autosuspend delay times out. To fix the issue, we want to implement refcounting for chan_busy array that contains the active dma transfers. Increasing the autosuspend delay won't help as that the delay could be potentially seconds, and it's best to let the USB subsystem to deal with the timeouts on errors. The earlier attempt for runtime PM was buggy as the pm_runtime_get/put() calls could get unpaired easily as they did not follow the state of the chan_busy array as described in commit 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected". Let's fix the issue by adding pm_runtime_get() to where a new transfer is added to the chan_busy array, and calls to pm_runtime_put() where chan_busy array entry is cleared. This prevents any autosuspend timeouts from happening while dma transfers are active. Fixes: 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when only a USB hub is connected") Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Bin Liu <b-liu@ti.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Patrick Titiano <ptitiano@baylibre.com> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-by: Bin Liu <b-liu@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'net/ethernet/eth.c')