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authorBen Dooks <ben-linux@fluff.org>2008-01-10 08:48:37 -0500
committerJaroslav Kysela <perex@perex.cz>2008-01-31 11:29:53 -0500
commit6cab2d3ddd54f2ef4872a4fca3d44655377737dd (patch)
tree94606e1ce47773315c7165c566221ec94c4b2ffd /sound/soc/s3c24xx
parent49646dfa2ae81e770da1c12c4fce227062ce4612 (diff)
[ALSA] S3C2412: suspend and resume support
Support for suspend/resume for the S3C2412 ASoC IIS core driver. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/soc/s3c24xx')
-rw-r--r--sound/soc/s3c24xx/s3c2412-i2s.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/sound/soc/s3c24xx/s3c2412-i2s.c b/sound/soc/s3c24xx/s3c2412-i2s.c
index b10f7ffa9424..c4a46dd589b3 100644
--- a/sound/soc/s3c24xx/s3c2412-i2s.c
+++ b/sound/soc/s3c24xx/s3c2412-i2s.c
@@ -79,6 +79,10 @@ struct s3c2412_i2s_info {
79 struct clk *iis_clk; 79 struct clk *iis_clk;
80 struct clk *iis_pclk; 80 struct clk *iis_pclk;
81 struct clk *iis_cclk; 81 struct clk *iis_cclk;
82
83 u32 suspend_iismod;
84 u32 suspend_iiscon;
85 u32 suspend_iispsr;
82}; 86};
83 87
84static struct s3c2412_i2s_info s3c2412_i2s; 88static struct s3c2412_i2s_info s3c2412_i2s;
@@ -641,6 +645,63 @@ static int s3c2412_i2s_probe(struct platform_device *pdev)
641 return 0; 645 return 0;
642} 646}
643 647
648#ifdef CONFIG_PM
649static int s3c2412_i2s_suspend(struct platform_device *dev,
650 struct snd_soc_cpu_dai *dai)
651{
652 struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
653 u32 iismod;
654
655 if (dai->active) {
656 i2s->suspend_iismod = readl(i2s->regs + S3C2412_IISMOD);
657 i2s->suspend_iiscon = readl(i2s->regs + S3C2412_IISCON);
658 i2s->suspend_iispsr = readl(i2s->regs + S3C2412_IISPSR);
659
660 /* some basic suspend checks */
661
662 iismod = readl(i2s->regs + S3C2412_IISMOD);
663
664 if (iismod & S3C2412_IISCON_RXDMA_ACTIVE)
665 dev_warn(&dev->dev, "%s: RXDMA active?\n", __func__);
666
667 if (iismod & S3C2412_IISCON_TXDMA_ACTIVE)
668 dev_warn(&dev->dev, "%s: TXDMA active?\n", __func__);
669
670 if (iismod & S3C2412_IISCON_IIS_ACTIVE)
671 dev_warn(&dev->dev, "%s: IIS active\n", __func__);
672 }
673
674 return 0;
675}
676
677static int s3c2412_i2s_resume(struct platform_device *pdev,
678 struct snd_soc_cpu_dai *dai)
679{
680 struct s3c2412_i2s_info *i2s = &s3c2412_i2s;
681
682 dev_info(&pdev->dev, "dai_active %d, IISMOD %08x, IISCON %08x\n",
683 dai->active, i2s->suspend_iismod, i2s->suspend_iiscon);
684
685 if (dai->active) {
686 writel(i2s->suspend_iiscon, i2s->regs + S3C2412_IISCON);
687 writel(i2s->suspend_iismod, i2s->regs + S3C2412_IISMOD);
688 writel(i2s->suspend_iispsr, i2s->regs + S3C2412_IISPSR);
689
690 writel(S3C2412_IISFIC_RXFLUSH | S3C2412_IISFIC_TXFLUSH,
691 i2s->regs + S3C2412_IISFIC);
692
693 ndelay(250);
694 writel(0x0, i2s->regs + S3C2412_IISFIC);
695
696 }
697
698 return 0;
699}
700#else
701#define s3c2412_i2s_suspend NULL
702#define s3c2412_i2s_resume NULL
703#endif /* CONFIG_PM */
704
644#define S3C2412_I2S_RATES \ 705#define S3C2412_I2S_RATES \
645 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ 706 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
646 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 707 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
@@ -651,6 +712,8 @@ struct snd_soc_cpu_dai s3c2412_i2s_dai = {
651 .id = 0, 712 .id = 0,
652 .type = SND_SOC_DAI_I2S, 713 .type = SND_SOC_DAI_I2S,
653 .probe = s3c2412_i2s_probe, 714 .probe = s3c2412_i2s_probe,
715 .suspend = s3c2412_i2s_suspend,
716 .resume = s3c2412_i2s_resume,
654 .playback = { 717 .playback = {
655 .channels_min = 2, 718 .channels_min = 2,
656 .channels_max = 2, 719 .channels_max = 2,