[ALSA] emu10k1 - Add PM support

Modules: EMU10K1/EMU10K2 driver

Add PM support to emu10k1 driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/emu10k1.h

@@ -1071,7 +1071,8 @@ struct snd_emu10k1 {
 
 	unsigned long port;			/* I/O port number */
 	unsigned int tos_link: 1,		/* tos link detected */
-	    rear_ac97: 1;			/* rear channels are on AC'97 */
+		rear_ac97: 1,			/* rear channels are on AC'97 */
+		enable_ir: 1;
 	/* Contains profile of card capabilities */
 	const struct snd_emu_chip_details *card_capabilities;
 	unsigned int audigy;			/* is Audigy? */
@@ -1108,6 +1109,7 @@ struct snd_emu10k1 {
 	struct snd_pcm *pcm;
 	struct snd_pcm *pcm_mic;
 	struct snd_pcm *pcm_efx;
+	struct snd_pcm *pcm_multi;
 	struct snd_pcm *pcm_p16v;
 
 	spinlock_t synth_lock;
@@ -1153,6 +1155,17 @@ struct snd_emu10k1 {
 
 	unsigned int efx_voices_mask[2];
 	unsigned int next_free_voice;
+
+#ifdef CONFIG_PM
+	unsigned int *saved_ptr;
+	unsigned int *saved_gpr;
+	unsigned int *tram_val_saved;
+	unsigned int *tram_addr_saved;
+	unsigned int *saved_icode;
+	unsigned int *p16v_saved;
+	unsigned int saved_a_iocfg, saved_hcfg;
+#endif
+
 };
 
 int snd_emu10k1_create(struct snd_card *card,
@@ -1178,11 +1191,11 @@ int snd_emu10k1_fx8010_new(struct snd_emu10k1 *emu, int device, struct snd_hwdep
 
 irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 
-/* initialization */
 void snd_emu10k1_voice_init(struct snd_emu10k1 * emu, int voice);
 int snd_emu10k1_init_efx(struct snd_emu10k1 *emu);
 void snd_emu10k1_free_efx(struct snd_emu10k1 *emu);
 int snd_emu10k1_fx8010_tram_setup(struct snd_emu10k1 *emu, u32 size);
+int snd_emu10k1_done(struct snd_emu10k1 * emu);
 
 /* I/O functions */
 unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, unsigned int chn);
@@ -1206,6 +1219,20 @@ unsigned short snd_emu10k1_ac97_read(struct snd_ac97 *ac97, unsigned short reg);
 void snd_emu10k1_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short data);
 unsigned int snd_emu10k1_rate_to_pitch(unsigned int rate);
 
+#ifdef CONFIG_PM
+void snd_emu10k1_suspend_regs(struct snd_emu10k1 *emu);
+void snd_emu10k1_resume_init(struct snd_emu10k1 *emu);
+void snd_emu10k1_resume_regs(struct snd_emu10k1 *emu);
+int snd_emu10k1_efx_alloc_pm_buffer(struct snd_emu10k1 *emu);
+void snd_emu10k1_efx_free_pm_buffer(struct snd_emu10k1 *emu);
+void snd_emu10k1_efx_suspend(struct snd_emu10k1 *emu);
+void snd_emu10k1_efx_resume(struct snd_emu10k1 *emu);
+int snd_p16v_alloc_pm_buffer(struct snd_emu10k1 *emu);
+void snd_p16v_free_pm_buffer(struct snd_emu10k1 *emu);
+void snd_p16v_suspend(struct snd_emu10k1 *emu);
+void snd_p16v_resume(struct snd_emu10k1 *emu);
+#endif
+
 /* memory allocation */
 struct snd_util_memblk *snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *substream);
 int snd_emu10k1_free_pages(struct snd_emu10k1 *emu, struct snd_util_memblk *blk);

sound/pci/emu10k1/emu10k1.c

@@ -125,65 +125,43 @@ static int __devinit snd_card_emu10k1_probe(struct pci_dev *pci,
 	if ((err = snd_emu10k1_create(card, pci, extin[dev], extout[dev],
 				      (long)max_buffer_size[dev] * 1024 * 1024,
 				      enable_ir[dev], subsystem[dev],
-				      &emu)) < 0) {
-		snd_card_free(card);
-		return err;
-	}		
-	if ((err = snd_emu10k1_pcm(emu, 0, NULL)) < 0) {
-		snd_card_free(card);
-		return err;
-	}		
-	if ((err = snd_emu10k1_pcm_mic(emu, 1, NULL)) < 0) {
-		snd_card_free(card);
-		return err;
-	}		
-	if ((err = snd_emu10k1_pcm_efx(emu, 2, NULL)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+				      &emu)) < 0)
+		goto error;
+	card->private_data = emu;
+	if ((err = snd_emu10k1_pcm(emu, 0, NULL)) < 0)
+		goto error;
+	if ((err = snd_emu10k1_pcm_mic(emu, 1, NULL)) < 0)
+		goto error;
+	if ((err = snd_emu10k1_pcm_efx(emu, 2, NULL)) < 0)
+		goto error;
 	/* This stores the periods table. */
 	if (emu->card_capabilities->ca0151_chip) { /* P16V */	
-		if(snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), 1024, &emu->p16v_buffer) < 0) {
-			snd_p16v_free(emu);
-			return -ENOMEM;
-		}
+		if ((err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
+					       1024, &emu->p16v_buffer)) < 0)
+			goto error;
 	}
 
-	if ((err = snd_emu10k1_mixer(emu, 0, 3)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if ((err = snd_emu10k1_mixer(emu, 0, 3)) < 0)
+		goto error;
 	
-	if ((err = snd_emu10k1_timer(emu, 0)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if ((err = snd_emu10k1_timer(emu, 0)) < 0)
+		goto error;
 
-	if ((err = snd_emu10k1_pcm_multi(emu, 3, NULL)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if ((err = snd_emu10k1_pcm_multi(emu, 3, NULL)) < 0)
+		goto error;
 	if (emu->card_capabilities->ca0151_chip) { /* P16V */
-		if ((err = snd_p16v_pcm(emu, 4, NULL)) < 0) {
-			snd_card_free(card);
-			return err;
-		}
+		if ((err = snd_p16v_pcm(emu, 4, NULL)) < 0)
+			goto error;
 	}
 	if (emu->audigy) {
-		if ((err = snd_emu10k1_audigy_midi(emu)) < 0) {
-			snd_card_free(card);
-			return err;
-		}
+		if ((err = snd_emu10k1_audigy_midi(emu)) < 0)
+			goto error;
 	} else {
-		if ((err = snd_emu10k1_midi(emu)) < 0) {
-			snd_card_free(card);
-			return err;
-		}
-	}
-	if ((err = snd_emu10k1_fx8010_new(emu, 0, NULL)) < 0) {
-		snd_card_free(card);
-		return err;
+		if ((err = snd_emu10k1_midi(emu)) < 0)
+			goto error;
 	}
+	if ((err = snd_emu10k1_fx8010_new(emu, 0, NULL)) < 0)
+		goto error;
 #ifdef ENABLE_SYNTH
 	if (snd_seq_device_new(card, 1, SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
 			       sizeof(struct snd_emu10k1_synth_arg), &wave) < 0 ||
@@ -206,13 +184,16 @@ static int __devinit snd_card_emu10k1_probe(struct pci_dev *pci,
 		 "%s (rev.%d, serial:0x%x) at 0x%lx, irq %i",
 		 card->shortname, emu->revision, emu->serial, emu->port, emu->irq);
 
-	if ((err = snd_card_register(card)) < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if ((err = snd_card_register(card)) < 0)
+		goto error;
+
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
+
+ error:
+	snd_card_free(card);
+	return err;
 }
 
 static void __devexit snd_card_emu10k1_remove(struct pci_dev *pci)
@@ -221,11 +202,68 @@ static void __devexit snd_card_emu10k1_remove(struct pci_dev *pci)
 	pci_set_drvdata(pci, NULL);
 }
 
+
+#ifdef CONFIG_PM
+static int snd_emu10k1_suspend(struct pci_dev *pci, pm_message_t state)
+{
+	struct snd_card *card = pci_get_drvdata(pci);
+	struct snd_emu10k1 *emu = card->private_data;
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+
+	snd_pcm_suspend_all(emu->pcm);
+	snd_pcm_suspend_all(emu->pcm_mic);
+	snd_pcm_suspend_all(emu->pcm_efx);
+	snd_pcm_suspend_all(emu->pcm_multi);
+	snd_pcm_suspend_all(emu->pcm_p16v);
+
+	snd_ac97_suspend(emu->ac97);
+
+	snd_emu10k1_efx_suspend(emu);
+	snd_emu10k1_suspend_regs(emu);
+	if (emu->card_capabilities->ca0151_chip)
+		snd_p16v_suspend(emu);
+
+	snd_emu10k1_done(emu);
+
+	pci_set_power_state(pci, PCI_D3hot);
+	pci_disable_device(pci);
+	pci_save_state(pci);
+	return 0;
+}
+
+int snd_emu10k1_resume(struct pci_dev *pci)
+{
+	struct snd_card *card = pci_get_drvdata(pci);
+	struct snd_emu10k1 *emu = card->private_data;
+
+	pci_restore_state(pci);
+	pci_enable_device(pci);
+	pci_set_power_state(pci, PCI_D0);
+	pci_set_master(pci);
+	
+	snd_emu10k1_resume_init(emu);
+	snd_emu10k1_efx_resume(emu);
+	snd_ac97_resume(emu->ac97);
+	snd_emu10k1_resume_regs(emu);
+
+	if (emu->card_capabilities->ca0151_chip)
+		snd_p16v_resume(emu);
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+	return 0;
+}
+#endif
+
 static struct pci_driver driver = {
 	.name = "EMU10K1_Audigy",
 	.id_table = snd_emu10k1_ids,
 	.probe = snd_card_emu10k1_probe,
 	.remove = __devexit_p(snd_card_emu10k1_remove),
+#ifdef CONFIG_PM
+	.suspend = snd_emu10k1_suspend,
+	.resume = snd_emu10k1_resume,
+#endif
 };
 
 static int __init alsa_card_emu10k1_init(void)

sound/pci/emu10k1/emufx.c

@@ -1071,9 +1071,6 @@ static int __devinit _snd_emu10k1_audigy_init_efx(struct snd_emu10k1 *emu)
 	u32 *gpr_map;
 	mm_segment_t seg;
 
-	spin_lock_init(&emu->fx8010.irq_lock);
-	INIT_LIST_HEAD(&emu->fx8010.gpr_ctl);
-
 	if ((icode = kzalloc(sizeof(*icode), GFP_KERNEL)) == NULL ||
 	    (icode->gpr_map = (u_int32_t __user *)
 	     kcalloc(512 + 256 + 256 + 2 * 1024, sizeof(u_int32_t),
@@ -1541,9 +1538,6 @@ static int __devinit _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
 	u32 *gpr_map;
 	mm_segment_t seg;
 
-	spin_lock_init(&emu->fx8010.irq_lock);
-	INIT_LIST_HEAD(&emu->fx8010.gpr_ctl);
-
 	if ((icode = kzalloc(sizeof(*icode), GFP_KERNEL)) == NULL)
 		return -ENOMEM;
 	if ((icode->gpr_map = (u_int32_t __user *)
@@ -2102,6 +2096,8 @@ static int __devinit _snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
 
 int __devinit snd_emu10k1_init_efx(struct snd_emu10k1 *emu)
 {
+	spin_lock_init(&emu->fx8010.irq_lock);
+	INIT_LIST_HEAD(&emu->fx8010.gpr_ctl);
 	if (emu->audigy)
 		return _snd_emu10k1_audigy_init_efx(emu);
 	else
@@ -2387,3 +2383,114 @@ int __devinit snd_emu10k1_fx8010_new(struct snd_emu10k1 *emu, int device, struct
 		*rhwdep = hw;
 	return 0;
 }
+
+#ifdef CONFIG_PM
+int __devinit snd_emu10k1_efx_alloc_pm_buffer(struct snd_emu10k1 *emu)
+{
+	int len;
+
+	len = emu->audigy ? 0x200 : 0x100;
+	emu->saved_gpr = kmalloc(len * 4, GFP_KERNEL);
+	if (! emu->saved_gpr)
+		return -ENOMEM;
+	len = emu->audigy ? 0x100 : 0xa0;
+	emu->tram_val_saved = kmalloc(len * 4, GFP_KERNEL);
+	emu->tram_addr_saved = kmalloc(len * 4, GFP_KERNEL);
+	if (! emu->tram_val_saved || ! emu->tram_addr_saved)
+		return -ENOMEM;
+	len = emu->audigy ? 2 * 1024 : 2 * 512;
+	emu->saved_icode = vmalloc(len * 4);
+	if (! emu->saved_icode)
+		return -ENOMEM;
+	return 0;
+}
+
+void snd_emu10k1_efx_free_pm_buffer(struct snd_emu10k1 *emu)
+{
+	kfree(emu->saved_gpr);
+	kfree(emu->tram_val_saved);
+	kfree(emu->tram_addr_saved);
+	vfree(emu->saved_icode);
+}
+
+/*
+ * save/restore GPR, TRAM and codes
+ */
+void snd_emu10k1_efx_suspend(struct snd_emu10k1 *emu)
+{
+	int i, len;
+
+	len = emu->audigy ? 0x200 : 0x100;
+	for (i = 0; i < len; i++)
+		emu->saved_gpr[i] = snd_emu10k1_ptr_read(emu, emu->gpr_base + i, 0);
+
+	len = emu->audigy ? 0x100 : 0xa0;
+	for (i = 0; i < len; i++) {
+		emu->tram_val_saved[i] = snd_emu10k1_ptr_read(emu, TANKMEMDATAREGBASE + i, 0);
+		emu->tram_addr_saved[i] = snd_emu10k1_ptr_read(emu, TANKMEMADDRREGBASE + i, 0);
+		if (emu->audigy) {
+			emu->tram_addr_saved[i] >>= 12;
+			emu->tram_addr_saved[i] |=
+				snd_emu10k1_ptr_read(emu, A_TANKMEMCTLREGBASE + i, 0) << 20;
+		}
+	}
+
+	len = emu->audigy ? 2 * 1024 : 2 * 512;
+	for (i = 0; i < len; i++)
+		emu->saved_icode[i] = snd_emu10k1_efx_read(emu, i);
+}
+
+void snd_emu10k1_efx_resume(struct snd_emu10k1 *emu)
+{
+	int i, len;
+
+	/* set up TRAM */
+	if (emu->fx8010.etram_pages.bytes > 0) {
+		unsigned size, size_reg = 0;
+		size = emu->fx8010.etram_pages.bytes / 2;
+		size = (size - 1) >> 13;
+		while (size) {
+			size >>= 1;
+			size_reg++;
+		}
+		outl(HCFG_LOCKTANKCACHE_MASK | inl(emu->port + HCFG), emu->port + HCFG);
+		snd_emu10k1_ptr_write(emu, TCB, 0, emu->fx8010.etram_pages.addr);
+		snd_emu10k1_ptr_write(emu, TCBS, 0, size_reg);
+		outl(inl(emu->port + HCFG) & ~HCFG_LOCKTANKCACHE_MASK, emu->port + HCFG);
+	}
+
+	if (emu->audigy)
+		snd_emu10k1_ptr_write(emu, A_DBG, 0, emu->fx8010.dbg | A_DBG_SINGLE_STEP);
+	else
+		snd_emu10k1_ptr_write(emu, DBG, 0, emu->fx8010.dbg | EMU10K1_DBG_SINGLE_STEP);
+
+	len = emu->audigy ? 0x200 : 0x100;
+	for (i = 0; i < len; i++)
+		snd_emu10k1_ptr_write(emu, emu->gpr_base + i, 0, emu->saved_gpr[i]);
+
+	len = emu->audigy ? 0x100 : 0xa0;
+	for (i = 0; i < len; i++) {
+		snd_emu10k1_ptr_write(emu, TANKMEMDATAREGBASE + i, 0,
+				      emu->tram_val_saved[i]);
+		if (! emu->audigy)
+			snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + i, 0,
+					      emu->tram_addr_saved[i]);
+		else {
+			snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + i, 0,
+					      emu->tram_addr_saved[i] << 12);
+			snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + i, 0,
+					      emu->tram_addr_saved[i] >> 20);
+		}
+	}
+
+	len = emu->audigy ? 2 * 1024 : 2 * 512;
+	for (i = 0; i < len; i++)
+		snd_emu10k1_efx_write(emu, i, emu->saved_icode[i]);
+
+	/* start FX processor when the DSP code is updated */
+	if (emu->audigy)
+		snd_emu10k1_ptr_write(emu, A_DBG, 0, emu->fx8010.dbg);
+	else
+		snd_emu10k1_ptr_write(emu, DBG, 0, emu->fx8010.dbg);
+}
+#endif

sound/pci/emu10k1/emupcm.c

@@ -551,6 +551,7 @@ static struct snd_pcm_hardware snd_emu10k1_efx_playback =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_NONINTERLEAVED |
 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_RESUME |
 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
 	.rates =		SNDRV_PCM_RATE_48000,
@@ -739,6 +740,7 @@ static int snd_emu10k1_playback_trigger(struct snd_pcm_substream *substream,
 		snd_emu10k1_playback_invalidate_cache(emu, 0, epcm->voices[0]);
 		/* follow thru */
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		mix = &emu->pcm_mixer[substream->number];
 		snd_emu10k1_playback_prepare_voice(emu, epcm->voices[0], 1, 0, mix);
 		snd_emu10k1_playback_prepare_voice(emu, epcm->voices[1], 0, 0, mix);
@@ -750,6 +752,7 @@ static int snd_emu10k1_playback_trigger(struct snd_pcm_substream *substream,
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
 		epcm->running = 0;
 		snd_emu10k1_playback_stop_voice(emu, epcm->voices[0]);
 		snd_emu10k1_playback_stop_voice(emu, epcm->voices[1]);
@@ -774,6 +777,7 @@ static int snd_emu10k1_capture_trigger(struct snd_pcm_substream *substream,
 	spin_lock(&emu->reg_lock);
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		// hmm this should cause full and half full interrupt to be raised?  
 		outl(epcm->capture_ipr, emu->port + IPR);
 		snd_emu10k1_intr_enable(emu, epcm->capture_inte);
@@ -797,6 +801,7 @@ static int snd_emu10k1_capture_trigger(struct snd_pcm_substream *substream,
 		epcm->first_ptr = 1;
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
 		epcm->running = 0;
 		snd_emu10k1_intr_disable(emu, epcm->capture_inte);
 		outl(epcm->capture_ipr, emu->port + IPR);
@@ -871,6 +876,7 @@ static int snd_emu10k1_efx_playback_trigger(struct snd_pcm_substream *substream,
 
 		/* follow thru */
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
 		snd_emu10k1_playback_prepare_voice(emu, epcm->extra, 1, 1, NULL);
 		snd_emu10k1_playback_prepare_voice(emu, epcm->voices[0], 0, 0,
 						   &emu->efx_pcm_mixer[0]);
@@ -883,6 +889,7 @@ static int snd_emu10k1_efx_playback_trigger(struct snd_pcm_substream *substream,
 			snd_emu10k1_playback_trigger_voice(emu, epcm->voices[i], 0, 0);
 		epcm->running = 1;
 		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		epcm->running = 0;
@@ -925,6 +932,7 @@ static struct snd_pcm_hardware snd_emu10k1_playback =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_RESUME |
 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
 	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_96000,
@@ -948,6 +956,7 @@ static struct snd_pcm_hardware snd_emu10k1_capture =
 {
 	.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_S16_LE,
 	.rates =		SNDRV_PCM_RATE_8000_48000,
@@ -1309,7 +1318,7 @@ int __devinit snd_emu10k1_pcm_multi(struct snd_emu10k1 * emu, int device, struct
 	pcm->info_flags = 0;
 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
 	strcpy(pcm->name, "Multichannel Playback");
-	emu->pcm = pcm;
+	emu->pcm_multi = pcm;
 
 	for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
 		if ((err = snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(emu->pci), 64*1024, 64*1024)) < 0)
@@ -1556,6 +1565,7 @@ static int snd_emu10k1_fx8010_playback_trigger(struct snd_pcm_substream *substre
 	case SNDRV_PCM_TRIGGER_START:
 		/* follow thru */
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+	case SNDRV_PCM_TRIGGER_RESUME:
 #ifdef EMU10K1_SET_AC3_IEC958
 	{
 		int i;
@@ -1576,6 +1586,7 @@ static int snd_emu10k1_fx8010_playback_trigger(struct snd_pcm_substream *substre
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
 		snd_emu10k1_fx8010_unregister_irq_handler(emu, pcm->irq); pcm->irq = NULL;
 		snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_trigger, 0, 0);
 		pcm->tram_pos = INITIAL_TRAM_POS(pcm->buffer_size);
@@ -1605,6 +1616,7 @@ static snd_pcm_uframes_t snd_emu10k1_fx8010_playback_pointer(struct snd_pcm_subs
 static struct snd_pcm_hardware snd_emu10k1_fx8010_playback =
 {
 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_RESUME |
 				 /* SNDRV_PCM_INFO_MMAP_VALID | */ SNDRV_PCM_INFO_PAUSE),
 	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 	.rates =		SNDRV_PCM_RATE_48000,

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