4 files changed, 153 insertions, 0 deletions

diff --git a/include/sound/sb.h b/include/sound/sb.h
index 8e82460c4d34..431d06675e36 100644
--- a/include/sound/sb.h
+++ b/include/sound/sb.h
@@ -107,6 +107,10 @@ struct snd_sb {
         spinlock_t midi_input_lock;
 
         struct snd_info_entry *proc_entry;
+
+#ifdef CONFIG_PM
+        unsigned char saved_regs[0x20];
+#endif
 };
 
 /* I/O ports */
@@ -290,6 +294,10 @@ int snd_sbdsp_create(struct snd_card *card,
 void snd_sbmixer_write(struct snd_sb *chip, unsigned char reg, unsigned char data);
 unsigned char snd_sbmixer_read(struct snd_sb *chip, unsigned char reg);
 int snd_sbmixer_new(struct snd_sb *chip);
+#ifdef CONFIG_PM
+void snd_sbmixer_suspend(struct snd_sb *chip);
+void snd_sbmixer_resume(struct snd_sb *chip);
+#endif
 
 /* sb8_init.c */
 int snd_sb8dsp_pcm(struct snd_sb *chip, int device, struct snd_pcm ** rpcm);
diff --git a/sound/isa/sb/sb16_main.c b/sound/isa/sb/sb16_main.c
index 97786ed37dd6..f183f1845a36 100644
--- a/sound/isa/sb/sb16_main.c
+++ b/sound/isa/sb/sb16_main.c
@@ -307,10 +307,12 @@ static int snd_sb16_playback_trigger(struct snd_pcm_substream *substream,
         spin_lock(&chip->reg_lock);
         switch (cmd) {
         case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
                 chip->mode |= SB_RATE_LOCK_PLAYBACK;
                 snd_sbdsp_command(chip, chip->mode & SB_MODE_PLAYBACK_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
                 break;
         case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
                 snd_sbdsp_command(chip, chip->mode & SB_MODE_PLAYBACK_16 ? SB_DSP_DMA16_OFF : SB_DSP_DMA8_OFF);
                 /* next two lines are needed for some types of DSP4 (SB AWE 32 - 4.13) */
                 if (chip->mode & SB_RATE_LOCK_CAPTURE)
@@ -374,10 +376,12 @@ static int snd_sb16_capture_trigger(struct snd_pcm_substream *substream,
         spin_lock(&chip->reg_lock);
         switch (cmd) {
         case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
                 chip->mode |= SB_RATE_LOCK_CAPTURE;
                 snd_sbdsp_command(chip, chip->mode & SB_MODE_CAPTURE_16 ? SB_DSP_DMA16_ON : SB_DSP_DMA8_ON);
                 break;
         case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
                 snd_sbdsp_command(chip, chip->mode & SB_MODE_CAPTURE_16 ? SB_DSP_DMA16_OFF : SB_DSP_DMA8_OFF);
                 /* next two lines are needed for some types of DSP4 (SB AWE 32 - 4.13) */
                 if (chip->mode & SB_RATE_LOCK_PLAYBACK)
diff --git a/sound/isa/sb/sb_common.c b/sound/isa/sb/sb_common.c
index eb86b4456eef..f343a8211d2d 100644
--- a/sound/isa/sb/sb_common.c
+++ b/sound/isa/sb/sb_common.c
@@ -293,6 +293,10 @@ EXPORT_SYMBOL(snd_sbmixer_write);
 EXPORT_SYMBOL(snd_sbmixer_read);
 EXPORT_SYMBOL(snd_sbmixer_new);
 EXPORT_SYMBOL(snd_sbmixer_add_ctl);
+#ifdef CONFIG_PM
+EXPORT_SYMBOL(snd_sbmixer_suspend);
+EXPORT_SYMBOL(snd_sbmixer_resume);
+#endif
 
 /*
  *  INIT part
diff --git a/sound/isa/sb/sb_mixer.c b/sound/isa/sb/sb_mixer.c
index 6e0b935a8b85..1a6ee344dddb 100644
--- a/sound/isa/sb/sb_mixer.c
+++ b/sound/isa/sb/sb_mixer.c
@@ -853,3 +853,140 @@ int snd_sbmixer_new(struct snd_sb *chip)
         }
         return 0;
 }
+
+#ifdef CONFIG_PM
+static unsigned char sb20_saved_regs[] = {
+        SB_DSP20_MASTER_DEV,
+        SB_DSP20_PCM_DEV,
+        SB_DSP20_FM_DEV,
+        SB_DSP20_CD_DEV,
+};
+
+static unsigned char sbpro_saved_regs[] = {
+        SB_DSP_MASTER_DEV,
+        SB_DSP_PCM_DEV,
+        SB_DSP_PLAYBACK_FILT,
+        SB_DSP_FM_DEV,
+        SB_DSP_CD_DEV,
+        SB_DSP_LINE_DEV,
+        SB_DSP_MIC_DEV,
+        SB_DSP_CAPTURE_SOURCE,
+        SB_DSP_CAPTURE_FILT,
+};
+
+static unsigned char sb16_saved_regs[] = {
+        SB_DSP4_MASTER_DEV, SB_DSP4_MASTER_DEV + 1,
+        SB_DSP4_3DSE,
+        SB_DSP4_BASS_DEV, SB_DSP4_BASS_DEV + 1,
+        SB_DSP4_TREBLE_DEV, SB_DSP4_TREBLE_DEV + 1,
+        SB_DSP4_PCM_DEV, SB_DSP4_PCM_DEV + 1,
+        SB_DSP4_INPUT_LEFT, SB_DSP4_INPUT_RIGHT,
+        SB_DSP4_SYNTH_DEV, SB_DSP4_SYNTH_DEV + 1,
+        SB_DSP4_OUTPUT_SW,
+        SB_DSP4_CD_DEV, SB_DSP4_CD_DEV + 1,
+        SB_DSP4_LINE_DEV, SB_DSP4_LINE_DEV + 1,
+        SB_DSP4_MIC_DEV,
+        SB_DSP4_SPEAKER_DEV,
+        SB_DSP4_IGAIN_DEV, SB_DSP4_IGAIN_DEV + 1,
+        SB_DSP4_OGAIN_DEV, SB_DSP4_OGAIN_DEV + 1,
+        SB_DSP4_MIC_AGC
+};
+
+static unsigned char dt019x_saved_regs[] = {
+        SB_DT019X_MASTER_DEV,
+        SB_DT019X_PCM_DEV,
+        SB_DT019X_SYNTH_DEV,
+        SB_DT019X_CD_DEV,
+        SB_DT019X_MIC_DEV,
+        SB_DT019X_SPKR_DEV,
+        SB_DT019X_LINE_DEV,
+        SB_DSP4_OUTPUT_SW,
+        SB_DT019X_OUTPUT_SW2,
+        SB_DT019X_CAPTURE_SW,
+};
+
+static unsigned char als4000_saved_regs[] = {
+        SB_DSP4_MASTER_DEV, SB_DSP4_MASTER_DEV + 1,
+        SB_DSP4_OUTPUT_SW,
+        SB_DSP4_PCM_DEV, SB_DSP4_PCM_DEV + 1,
+        SB_DSP4_INPUT_LEFT, SB_DSP4_INPUT_RIGHT,
+        SB_DSP4_SYNTH_DEV, SB_DSP4_SYNTH_DEV + 1,
+        SB_DSP4_CD_DEV, SB_DSP4_CD_DEV + 1,
+        SB_DSP4_MIC_AGC,
+        SB_DSP4_MIC_DEV,
+        SB_DSP4_SPEAKER_DEV,
+        SB_DSP4_IGAIN_DEV, SB_DSP4_IGAIN_DEV + 1,
+        SB_DSP4_OGAIN_DEV, SB_DSP4_OGAIN_DEV + 1,
+        SB_DT019X_OUTPUT_SW2,
+        SB_ALS4000_MONO_IO_CTRL,
+        SB_ALS4000_MIC_IN_GAIN,
+        SB_ALS4000_3D_SND_FX,
+        SB_ALS4000_3D_TIME_DELAY,
+};
+
+static void save_mixer(struct snd_sb *chip, unsigned char *regs, int num_regs)
+{
+        unsigned char *val = chip->saved_regs;
+        snd_assert(num_regs > ARRAY_SIZE(chip->saved_regs), return);
+        for (; num_regs; num_regs--)
+                *val++ = snd_sbmixer_read(chip, *regs++);
+}
+
+static void restore_mixer(struct snd_sb *chip, unsigned char *regs, int num_regs)
+{
+        unsigned char *val = chip->saved_regs;
+        snd_assert(num_regs > ARRAY_SIZE(chip->saved_regs), return);
+        for (; num_regs; num_regs--)
+                snd_sbmixer_write(chip, *regs++, *val++);
+}
+
+void snd_sbmixer_suspend(struct snd_sb *chip)
+{
+        switch (chip->hardware) {
+        case SB_HW_20:
+        case SB_HW_201:
+                save_mixer(chip, sb20_saved_regs, ARRAY_SIZE(sb20_saved_regs));
+                break;
+        case SB_HW_PRO:
+                save_mixer(chip, sbpro_saved_regs, ARRAY_SIZE(sbpro_saved_regs));
+                break;
+        case SB_HW_16:
+        case SB_HW_ALS100:
+                save_mixer(chip, sb16_saved_regs, ARRAY_SIZE(sb16_saved_regs));
+                break;
+        case SB_HW_ALS4000:
+                save_mixer(chip, als4000_saved_regs, ARRAY_SIZE(als4000_saved_regs));
+                break;
+        case SB_HW_DT019X:
+                save_mixer(chip, dt019x_saved_regs, ARRAY_SIZE(dt019x_saved_regs));
+                break;
+        default:
+                break;
+        }
+}
+
+void snd_sbmixer_resume(struct snd_sb *chip)
+{
+        switch (chip->hardware) {
+        case SB_HW_20:
+        case SB_HW_201:
+                restore_mixer(chip, sb20_saved_regs, ARRAY_SIZE(sb20_saved_regs));
+                break;
+        case SB_HW_PRO:
+                restore_mixer(chip, sbpro_saved_regs, ARRAY_SIZE(sbpro_saved_regs));
+                break;
+        case SB_HW_16:
+        case SB_HW_ALS100:
+                restore_mixer(chip, sb16_saved_regs, ARRAY_SIZE(sb16_saved_regs));
+                break;
+        case SB_HW_ALS4000:
+                restore_mixer(chip, als4000_saved_regs, ARRAY_SIZE(als4000_saved_regs));
+                break;
+        case SB_HW_DT019X:
+                restore_mixer(chip, dt019x_saved_regs, ARRAY_SIZE(dt019x_saved_regs));
+                break;
+        default:
+                break;
+        }
+}
+#endif