[ALSA] cs46xx - Fix PM resume

Fixed PM resume of cs46xx devices.  It now restores properly the DSP
image and kick-off the DSP.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

include/sound/cs46xx.h

@@ -1723,6 +1723,10 @@ struct snd_cs46xx {
 	struct snd_cs46xx_pcm *playback_pcm;
 	unsigned int play_ctl;
 #endif
+
+#ifdef CONFIG_PM
+	u32 *saved_regs;
+#endif
 };
 
 int snd_cs46xx_create(struct snd_card *card,

include/sound/cs46xx_dsp_spos.h

@@ -107,6 +107,7 @@ struct dsp_scb_descriptor {
 	char scb_name[DSP_MAX_SCB_NAME];
 	u32 address;
 	int index;
+	u32 *data;
 
 	struct dsp_scb_descriptor * sub_list_ptr;
 	struct dsp_scb_descriptor * next_scb_ptr;
@@ -127,6 +128,7 @@ struct dsp_task_descriptor {
 	int size;
 	u32 address;
 	int index;
+	u32 *data;
 };
 
 struct dsp_pcm_channel_descriptor {

sound/pci/cs46xx/cs46xx_lib.c

@@ -2897,6 +2897,10 @@ static int snd_cs46xx_free(struct snd_cs46xx *chip)
 	}
 #endif
 	
+#ifdef CONFIG_PM
+	kfree(chip->saved_regs);
+#endif
+
 	pci_disable_device(chip->pci);
 	kfree(chip);
 	return 0;
@@ -3140,6 +3144,23 @@ static int snd_cs46xx_chip_init(struct snd_cs46xx *chip)
 /*
  *  start and load DSP 
  */
+
+static void cs46xx_enable_stream_irqs(struct snd_cs46xx *chip)
+{
+	unsigned int tmp;
+
+	snd_cs46xx_pokeBA0(chip, BA0_HICR, HICR_IEV | HICR_CHGM);
+        
+	tmp = snd_cs46xx_peek(chip, BA1_PFIE);
+	tmp &= ~0x0000f03f;
+	snd_cs46xx_poke(chip, BA1_PFIE, tmp);	/* playback interrupt enable */
+
+	tmp = snd_cs46xx_peek(chip, BA1_CIE);
+	tmp &= ~0x0000003f;
+	tmp |=  0x00000001;
+	snd_cs46xx_poke(chip, BA1_CIE, tmp);	/* capture interrupt enable */
+}
+
 int __devinit snd_cs46xx_start_dsp(struct snd_cs46xx *chip)
 {	
 	unsigned int tmp;
@@ -3214,19 +3235,7 @@ int __devinit snd_cs46xx_start_dsp(struct snd_cs46xx *chip)
 
 	snd_cs46xx_proc_start(chip);
 
-	/*
-	 *  Enable interrupts on the part.
-	 */
-	snd_cs46xx_pokeBA0(chip, BA0_HICR, HICR_IEV | HICR_CHGM);
-        
-	tmp = snd_cs46xx_peek(chip, BA1_PFIE);
-	tmp &= ~0x0000f03f;
-	snd_cs46xx_poke(chip, BA1_PFIE, tmp);	/* playback interrupt enable */
-
-	tmp = snd_cs46xx_peek(chip, BA1_CIE);
-	tmp &= ~0x0000003f;
-	tmp |=  0x00000001;
-	snd_cs46xx_poke(chip, BA1_CIE, tmp);	/* capture interrupt enable */
+	cs46xx_enable_stream_irqs(chip);
 	
 #ifndef CONFIG_SND_CS46XX_NEW_DSP
 	/* set the attenuation to 0dB */ 
@@ -3665,11 +3674,19 @@ static struct cs_card_type __devinitdata cards[] = {
  * APM support
  */
 #ifdef CONFIG_PM
+static unsigned int saved_regs[] = {
+	BA0_ACOSV,
+	BA0_ASER_FADDR,
+	BA0_ASER_MASTER,
+	BA1_PVOL,
+	BA1_CVOL,
+};
+
 int snd_cs46xx_suspend(struct pci_dev *pci, pm_message_t state)
 {
 	struct snd_card *card = pci_get_drvdata(pci);
 	struct snd_cs46xx *chip = card->private_data;
-	int amp_saved;
+	int i, amp_saved;
 
 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
 	chip->in_suspend = 1;
@@ -3680,6 +3697,10 @@ int snd_cs46xx_suspend(struct pci_dev *pci, pm_message_t state)
 	snd_ac97_suspend(chip->ac97[CS46XX_PRIMARY_CODEC_INDEX]);
 	snd_ac97_suspend(chip->ac97[CS46XX_SECONDARY_CODEC_INDEX]);
 
+	/* save some registers */
+	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
+		chip->saved_regs[i] = snd_cs46xx_peekBA0(chip, saved_regs[i]);
+
 	amp_saved = chip->amplifier;
 	/* turn off amp */
 	chip->amplifier_ctrl(chip, -chip->amplifier);
@@ -3698,7 +3719,7 @@ int snd_cs46xx_resume(struct pci_dev *pci)
 {
 	struct snd_card *card = pci_get_drvdata(pci);
 	struct snd_cs46xx *chip = card->private_data;
-	int amp_saved;
+	int i, amp_saved;
 
 	pci_set_power_state(pci, PCI_D0);
 	pci_restore_state(pci);
@@ -3716,6 +3737,16 @@ int snd_cs46xx_resume(struct pci_dev *pci)
 
 	snd_cs46xx_chip_init(chip);
 
+	snd_cs46xx_reset(chip);
+#ifdef CONFIG_SND_CS46XX_NEW_DSP
+	cs46xx_dsp_resume(chip);
+	/* restore some registers */
+	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
+		snd_cs46xx_pokeBA0(chip, saved_regs[i], chip->saved_regs[i]);
+#else
+	snd_cs46xx_download_image(chip);
+#endif
+
 #if 0
 	snd_cs46xx_codec_write(chip, BA0_AC97_GENERAL_PURPOSE, 
 			       chip->ac97_general_purpose);
@@ -3730,6 +3761,13 @@ int snd_cs46xx_resume(struct pci_dev *pci)
 	snd_ac97_resume(chip->ac97[CS46XX_PRIMARY_CODEC_INDEX]);
 	snd_ac97_resume(chip->ac97[CS46XX_SECONDARY_CODEC_INDEX]);
 
+	/* reset playback/capture */
+	snd_cs46xx_set_play_sample_rate(chip, 8000);
+	snd_cs46xx_set_capture_sample_rate(chip, 8000);
+	snd_cs46xx_proc_start(chip);
+
+	cs46xx_enable_stream_irqs(chip);
+
 	if (amp_saved)
 		chip->amplifier_ctrl(chip, 1); /* turn amp on */
 	else
@@ -3896,6 +3934,15 @@ int __devinit snd_cs46xx_create(struct snd_card *card,
 	
 	snd_cs46xx_proc_init(card, chip);
 
+#ifdef CONFIG_PM
+	chip->saved_regs = kmalloc(sizeof(*chip->saved_regs) *
+				   ARRAY_SIZE(saved_regs), GFP_KERNEL);
+	if (!chip->saved_regs) {
+		snd_cs46xx_free(chip);
+		return -ENOMEM;
+	}
+#endif
+
 	chip->active_ctrl(chip, -1); /* disable CLKRUN */
 
 	snd_card_set_dev(card, &pci->dev);

sound/pci/cs46xx/cs46xx_lib.h

@@ -86,6 +86,9 @@ static inline unsigned int snd_cs46xx_peekBA0(struct snd_cs46xx *chip, unsigned
 struct dsp_spos_instance *cs46xx_dsp_spos_create (struct snd_cs46xx * chip);
 void cs46xx_dsp_spos_destroy (struct snd_cs46xx * chip);
 int cs46xx_dsp_load_module (struct snd_cs46xx * chip, struct dsp_module_desc * module);
+#ifdef CONFIG_PM
+int cs46xx_dsp_resume(struct snd_cs46xx * chip);
+#endif
 struct dsp_symbol_entry *cs46xx_dsp_lookup_symbol (struct snd_cs46xx * chip, char * symbol_name,
 						   int symbol_type);
 #ifdef CONFIG_PROC_FS

sound/pci/cs46xx/dsp_spos.c

@@ -306,13 +306,59 @@ void  cs46xx_dsp_spos_destroy (struct snd_cs46xx * chip)
 	mutex_unlock(&chip->spos_mutex);
 }
 
+static int dsp_load_parameter(struct snd_cs46xx *chip,
+			      struct dsp_segment_desc *parameter)
+{
+	u32 doffset, dsize;
+
+	if (!parameter) {
+		snd_printdd("dsp_spos: module got no parameter segment\n");
+		return 0;
+	}
+
+	doffset = (parameter->offset * 4 + DSP_PARAMETER_BYTE_OFFSET);
+	dsize   = parameter->size * 4;
+
+	snd_printdd("dsp_spos: "
+		    "downloading parameter data to chip (%08x-%08x)\n",
+		    doffset,doffset + dsize);
+	if (snd_cs46xx_download (chip, parameter->data, doffset, dsize)) {
+		snd_printk(KERN_ERR "dsp_spos: "
+			   "failed to download parameter data to DSP\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int dsp_load_sample(struct snd_cs46xx *chip,
+			   struct dsp_segment_desc *sample)
+{
+	u32 doffset, dsize;
+
+	if (!sample) {
+		snd_printdd("dsp_spos: module got no sample segment\n");
+		return 0;
+	}
+
+	doffset = (sample->offset * 4  + DSP_SAMPLE_BYTE_OFFSET);
+	dsize   =  sample->size * 4;
+
+	snd_printdd("dsp_spos: downloading sample data to chip (%08x-%08x)\n",
+		    doffset,doffset + dsize);
+
+	if (snd_cs46xx_download (chip,sample->data,doffset,dsize)) {
+		snd_printk(KERN_ERR "dsp_spos: failed to sample data to DSP\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
 int cs46xx_dsp_load_module (struct snd_cs46xx * chip, struct dsp_module_desc * module)
 {
 	struct dsp_spos_instance * ins = chip->dsp_spos_instance;
 	struct dsp_segment_desc * code = get_segment_desc (module,SEGTYPE_SP_PROGRAM);
-	struct dsp_segment_desc * parameter = get_segment_desc (module,SEGTYPE_SP_PARAMETER);
-	struct dsp_segment_desc * sample = get_segment_desc (module,SEGTYPE_SP_SAMPLE);
 	u32 doffset, dsize;
+	int err;
 
 	if (ins->nmodules == DSP_MAX_MODULES - 1) {
 		snd_printk(KERN_ERR "dsp_spos: to many modules loaded into DSP\n");
@@ -326,49 +372,20 @@ int cs46xx_dsp_load_module (struct snd_cs46xx * chip, struct dsp_module_desc * m
 		snd_cs46xx_clear_BA1(chip, DSP_PARAMETER_BYTE_OFFSET, DSP_PARAMETER_BYTE_SIZE);
 	}
   
-	if (parameter == NULL) {
-		snd_printdd("dsp_spos: module got no parameter segment\n");
-	} else {
-		if (ins->nmodules > 0) {
-			snd_printk(KERN_WARNING "dsp_spos: WARNING current parameter data may be overwriten!\n");
-		}
-
-		doffset = (parameter->offset * 4 + DSP_PARAMETER_BYTE_OFFSET);
-		dsize   = parameter->size * 4;
-
-		snd_printdd("dsp_spos: downloading parameter data to chip (%08x-%08x)\n",
-			    doffset,doffset + dsize);
-
-		if (snd_cs46xx_download (chip, parameter->data, doffset, dsize)) {
-			snd_printk(KERN_ERR "dsp_spos: failed to download parameter data to DSP\n");
-			return -EINVAL;
-		}
-	}
+	err = dsp_load_parameter(chip, get_segment_desc(module,
+							SEGTYPE_SP_PARAMETER));
+	if (err < 0)
+		return err;
 
 	if (ins->nmodules == 0) {
 		snd_printdd("dsp_spos: clearing sample area\n");
 		snd_cs46xx_clear_BA1(chip, DSP_SAMPLE_BYTE_OFFSET, DSP_SAMPLE_BYTE_SIZE);
 	}
 
-	if (sample == NULL) {
-		snd_printdd("dsp_spos: module got no sample segment\n");
-	} else {
-		if (ins->nmodules > 0) {
-			snd_printk(KERN_WARNING "dsp_spos: WARNING current sample data may be overwriten\n");
-		}
-
-		doffset = (sample->offset * 4  + DSP_SAMPLE_BYTE_OFFSET);
-		dsize   =  sample->size * 4;
-
-		snd_printdd("dsp_spos: downloading sample data to chip (%08x-%08x)\n",
-			    doffset,doffset + dsize);
-
-		if (snd_cs46xx_download (chip,sample->data,doffset,dsize)) {
-			snd_printk(KERN_ERR "dsp_spos: failed to sample data to DSP\n");
-			return -EINVAL;
-		}
-	}
-
+	err = dsp_load_sample(chip, get_segment_desc(module,
+						     SEGTYPE_SP_SAMPLE));
+	if (err < 0)
+		return err;
 
 	if (ins->nmodules == 0) {
 		snd_printdd("dsp_spos: clearing code area\n");
@@ -986,7 +1003,10 @@ _map_task_tree (struct snd_cs46xx *chip, char * name, u32 dest, u32 size)
 		return NULL;
 	}
 
-	strcpy(ins->tasks[ins->ntask].task_name,name);
+	if (name)
+		strcpy(ins->tasks[ins->ntask].task_name, name);
+	else
+		strcpy(ins->tasks[ins->ntask].task_name, "(NULL)");
 	ins->tasks[ins->ntask].address = dest;
 	ins->tasks[ins->ntask].size = size;
 
@@ -995,7 +1015,8 @@ _map_task_tree (struct snd_cs46xx *chip, char * name, u32 dest, u32 size)
 	desc = (ins->tasks + ins->ntask);
 	ins->ntask++;
 
-	add_symbol (chip,name,dest,SYMBOL_PARAMETER);
+	if (name)
+		add_symbol (chip,name,dest,SYMBOL_PARAMETER);
 	return desc;
 }
 
@@ -1006,6 +1027,7 @@ cs46xx_dsp_create_scb (struct snd_cs46xx *chip, char * name, u32 * scb_data, u32
 
 	desc = _map_scb (chip,name,dest);
 	if (desc) {
+		desc->data = scb_data;
 		_dsp_create_scb(chip,scb_data,dest);
 	} else {
 		snd_printk(KERN_ERR "dsp_spos: failed to map SCB\n");
@@ -1023,6 +1045,7 @@ cs46xx_dsp_create_task_tree (struct snd_cs46xx *chip, char * name, u32 * task_da
 
 	desc = _map_task_tree (chip,name,dest,size);
 	if (desc) {
+		desc->data = task_data;
 		_dsp_create_task_tree(chip,task_data,dest,size);
 	} else {
 		snd_printk(KERN_ERR "dsp_spos: failed to map TASK\n");
@@ -1320,8 +1343,10 @@ int cs46xx_dsp_scb_and_task_init (struct snd_cs46xx *chip)
 			0x0000ffff
 		};
     
-		/* dirty hack ... */
-		_dsp_create_task_tree (chip,(u32 *)&mix2_ostream_spb,WRITE_BACK_SPB,2);
+		if (!cs46xx_dsp_create_task_tree(chip, NULL,
+						 (u32 *)&mix2_ostream_spb,
+						 WRITE_BACK_SPB, 2))
+			goto _fail_end;
 	}
 
 	/* input sample converter */
@@ -1622,7 +1647,6 @@ static int cs46xx_dsp_async_init (struct snd_cs46xx *chip,
 	return 0;
 }
 
-
 static void cs46xx_dsp_disable_spdif_hw (struct snd_cs46xx *chip)
 {
 	struct dsp_spos_instance * ins = chip->dsp_spos_instance;
@@ -1894,3 +1918,61 @@ int cs46xx_dsp_set_iec958_volume (struct snd_cs46xx * chip, u16 left, u16 right)
 
 	return 0;
 }
+
+#ifdef CONFIG_PM
+int cs46xx_dsp_resume(struct snd_cs46xx * chip)
+{
+	struct dsp_spos_instance * ins = chip->dsp_spos_instance;
+	int i, err;
+
+	/* clear parameter, sample and code areas */
+	snd_cs46xx_clear_BA1(chip, DSP_PARAMETER_BYTE_OFFSET,
+			     DSP_PARAMETER_BYTE_SIZE);
+	snd_cs46xx_clear_BA1(chip, DSP_SAMPLE_BYTE_OFFSET,
+			     DSP_SAMPLE_BYTE_SIZE);
+	snd_cs46xx_clear_BA1(chip, DSP_CODE_BYTE_OFFSET, DSP_CODE_BYTE_SIZE);
+
+	for (i = 0; i < ins->nmodules; i++) {
+		struct dsp_module_desc *module = &ins->modules[i];
+		struct dsp_segment_desc *seg;
+		u32 doffset, dsize;
+
+		seg = get_segment_desc(module, SEGTYPE_SP_PARAMETER);
+		err = dsp_load_parameter(chip, seg);
+		if (err < 0)
+			return err;
+
+		seg = get_segment_desc(module, SEGTYPE_SP_SAMPLE);
+		err = dsp_load_sample(chip, seg);
+		if (err < 0)
+			return err;
+
+		seg = get_segment_desc(module, SEGTYPE_SP_PROGRAM);
+		if (!seg)
+			continue;
+
+		doffset = seg->offset * 4 + module->load_address * 4
+			+ DSP_CODE_BYTE_OFFSET;
+		dsize   = seg->size * 4;
+		err = snd_cs46xx_download(chip,
+					  ins->code.data + module->load_address,
+					  doffset, dsize);
+		if (err < 0)
+			return err;
+	}
+
+	for (i = 0; i < ins->ntask; i++) {
+		struct dsp_task_descriptor *t = &ins->tasks[i];
+		_dsp_create_task_tree(chip, t->data, t->address, t->size);
+	}
+
+	for (i = 0; i < ins->nscb; i++) {
+		struct dsp_scb_descriptor *s = &ins->scbs[i];
+		if (s->deleted)
+			continue;
+		_dsp_create_scb(chip, s->data, s->address);
+	}
+
+	return 0;
+}
+#endif