[ALSA] emu10k1 - Add PM support

Modules: EMU10K1/EMU10K2 driver

Add PM support to emu10k1 driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 42 insertions, 1 deletions

diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 90470de8bb8e..adce6af98d01 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -125,6 +125,7 @@ static struct snd_pcm_hardware snd_p16v_playback_hw = {
         .info =                 (SNDRV_PCM_INFO_MMAP | 
                                  SNDRV_PCM_INFO_INTERLEAVED |
                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                 SNDRV_PCM_INFO_RESUME |
                                  SNDRV_PCM_INFO_MMAP_VALID),
         .formats =              SNDRV_PCM_FMTBIT_S32_LE, /* Only supports 24-bit samples padded to 32 bits. */
         .rates =                SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
@@ -144,6 +145,7 @@ static struct snd_pcm_hardware snd_p16v_capture_hw = {
         .info =                 (SNDRV_PCM_INFO_MMAP |
                                  SNDRV_PCM_INFO_INTERLEAVED |
                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                 SNDRV_PCM_INFO_RESUME |
                                  SNDRV_PCM_INFO_MMAP_VALID),
         .formats =              SNDRV_PCM_FMTBIT_S32_LE,
         .rates =                SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
@@ -611,7 +613,7 @@ int snd_p16v_pcm(struct snd_emu10k1 *emu, int device, struct snd_pcm **rpcm)
         pcm->info_flags = 0;
         pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
         strcpy(pcm->name, "p16v");
-        emu->pcm = pcm;
+        emu->pcm_p16v = pcm;
 
         for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; 
             substream; 
@@ -1030,3 +1032,42 @@ int snd_p16v_mixer(struct snd_emu10k1 *emu)
         return 0;
 }
 
+#ifdef CONFIG_PM
+
+#define NUM_CHS 1       /* up to 4, but only first channel is used */
+
+int __devinit snd_p16v_alloc_pm_buffer(struct snd_emu10k1 *emu)
+{
+        emu->p16v_saved = vmalloc(NUM_CHS * 4 * 0x80);
+        if (! emu->p16v_saved)
+                return -ENOMEM;
+        return 0;
+}
+
+void snd_p16v_free_pm_buffer(struct snd_emu10k1 *emu)
+{
+        vfree(emu->p16v_saved);
+}
+
+void snd_p16v_suspend(struct snd_emu10k1 *emu)
+{
+        int i, ch;
+        unsigned int *val;
+
+        val = emu->p16v_saved;
+        for (ch = 0; ch < NUM_CHS; ch++)
+                for (i = 0; i < 0x80; i++, val++)
+                        *val = snd_emu10k1_ptr20_read(emu, i, ch);
+}
+
+void snd_p16v_resume(struct snd_emu10k1 *emu)
+{
+        int i, ch;
+        unsigned int *val;
+
+        val = emu->p16v_saved;
+        for (ch = 0; ch < NUM_CHS; ch++)
+                for (i = 0; i < 0x80; i++, val++)
+                        snd_emu10k1_ptr20_write(emu, i, ch, *val);
+}
+#endif