[ALSA] Adds Capture to P16V chip.

EMU10K1/EMU10K2 driver
One can select which capture source, but one cannot yet set volumes.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

3 files changed, 275 insertions, 33 deletions

diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 43b6786..8221df8 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -83,7 +83,8 @@
 #define IPR			0x08		/* Global interrupt pending register		*/
 						/* Clear pending interrupts by writing a 1 to	*/
 						/* the relevant bits and zero to the other bits	*/
-
+#define IPR_P16V		0x80000000	/* Bit set when the CA0151 P16V chip wishes
+						   to interrupt */
 #define IPR_GPIOMSG		0x20000000	/* GPIO message interrupt (RE'd, still not sure 
 						   which INTE bits enable it)			*/
 
@@ -1109,7 +1110,9 @@ struct _snd_emu10k1 {
 
 	emu10k1_voice_t voices[NUM_G];
 	emu10k1_voice_t p16v_voices[4];
+	emu10k1_voice_t p16v_capture_voice;
 	int p16v_device_offset;
+	u32 p16v_capture_source;
 	emu10k1_pcm_mixer_t pcm_mixer[32];
 	emu10k1_pcm_mixer_t efx_pcm_mixer[NUM_EFX_PLAYBACK];
 	snd_kcontrol_t *ctl_send_routing;
diff --git a/sound/pci/emu10k1/irq.c b/sound/pci/emu10k1/irq.c
index b81a7ca..cd8460d 100644
--- a/sound/pci/emu10k1/irq.c
+++ b/sound/pci/emu10k1/irq.c
@@ -37,7 +37,7 @@ irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	int handled = 0;
 
 	while ((status = inl(emu->port + IPR)) != 0) {
-		// printk("irq - status = 0x%x\n", status);
+		//printk("emu10k1 irq - status = 0x%x\n", status);
 		orig_status = status;
 		handled = 1;
 		if (status & IPR_PCIERROR) {
@@ -147,9 +147,36 @@ irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 				snd_emu10k1_intr_disable(emu, INTE_FXDSPENABLE);
 			status &= ~IPR_FXDSP;
 		}
+		if (status & IPR_P16V) {
+			while ((status2 = inl(emu->port + IPR2)) != 0) {
+				u32 mask = INTE2_PLAYBACK_CH_0_LOOP;  /* Full Loop */
+				emu10k1_voice_t *pvoice = &(emu->p16v_voices[0]);
+				emu10k1_voice_t *cvoice = &(emu->p16v_capture_voice);
+
+				//printk(KERN_INFO "status2=0x%x\n", status2);
+				orig_status2 = status2;
+				if(status2 & mask) {
+					if(pvoice->use) {
+						snd_pcm_period_elapsed(pvoice->epcm->substream);
+					} else { 
+						snd_printk(KERN_ERR "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n", status2, mask, pvoice, pvoice->use);
+					}
+				}
+				if(status2 & 0x110000) {
+					//printk(KERN_INFO "capture int found\n");
+					if(cvoice->use) {
+						//printk(KERN_INFO "capture period_elapsed\n");
+						snd_pcm_period_elapsed(cvoice->epcm->substream);
+					}
+				}
+				outl(orig_status2, emu->port + IPR2); /* ack all */
+			}
+			status &= ~IPR_P16V;
+		}
+
 		if (status) {
 			unsigned int bits;
-			//snd_printk(KERN_ERR "emu10k1: unhandled interrupt: 0x%08x\n", status);
+			snd_printk(KERN_ERR "emu10k1: unhandled interrupt: 0x%08x\n", status);
 			//make sure any interrupts we don't handle are disabled:
 			bits = INTE_FXDSPENABLE |
 				INTE_PCIERRORENABLE |
@@ -170,20 +197,5 @@ irqreturn_t snd_emu10k1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 		}
 		outl(orig_status, emu->port + IPR); /* ack all */
 	}
-	if (emu->audigy && emu->revision == 4) { /* P16V */	
-		while ((status2 = inl(emu->port + IPR2)) != 0) {
-			u32 mask = INTE2_PLAYBACK_CH_0_LOOP;  /* Full Loop */
-			emu10k1_voice_t *pvoice = &(emu->p16v_voices[0]);
-			orig_status2 = status2;
-			if(status2 & mask) {
-				if(pvoice->use) {
-					snd_pcm_period_elapsed(pvoice->epcm->substream);
-				} else { 
-					snd_printk(KERN_ERR "p16v: status: 0x%08x, mask=0x%08x, pvoice=%p, use=%d\n", status2, mask, pvoice, pvoice->use);
-				}
-			}
-			outl(orig_status2, emu->port + IPR2); /* ack all */
-		}
-	}
 	return IRQ_RETVAL(handled);
 }
diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index d03cb2f..dd6ce99 100644
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -132,9 +132,29 @@ static snd_pcm_hardware_t snd_p16v_playback_hw = {
 	.fifo_size =		0,
 };
 
+static snd_pcm_hardware_t snd_p16v_capture_hw = {
+       .info =                 (SNDRV_PCM_INFO_MMAP |
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                SNDRV_PCM_INFO_MMAP_VALID),
+       .formats =              SNDRV_PCM_FMTBIT_S32_LE,
+       .rates =                SNDRV_PCM_RATE_48000,
+       .rate_min =             48000,
+       .rate_max =             48000,
+       .channels_min =         2,
+       .channels_max =         2,
+       .buffer_bytes_max =     (32*1024),
+       .period_bytes_min =     64,
+       .period_bytes_max =     (16*1024),
+       .periods_min =          2,
+       .periods_max =          2,
+       .fifo_size =            0,
+};
+
+
 static void snd_p16v_pcm_free_substream(snd_pcm_runtime_t *runtime)
 {
-	snd_pcm_t *epcm = runtime->private_data;
+	emu10k1_pcm_t *epcm = runtime->private_data;
   
 	if (epcm) {
         	//snd_printk("epcm free: %p\n", epcm);
@@ -178,15 +198,63 @@ static int snd_p16v_pcm_open_playback_channel(snd_pcm_substream_t *substream, in
 
 	return 0;
 }
+/* open_capture callback */
+static int snd_p16v_pcm_open_capture_channel(snd_pcm_substream_t *substream, int channel_id)
+{
+	emu10k1_t *emu = snd_pcm_substream_chip(substream);
+	emu10k1_voice_t *channel = &(emu->p16v_capture_voice);
+	emu10k1_pcm_t *epcm;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int err;
+
+	epcm = kcalloc(1, sizeof(*epcm), GFP_KERNEL);
+	//snd_printk("epcm kcalloc: %p\n", epcm);
+
+	if (epcm == NULL)
+		return -ENOMEM;
+	epcm->emu = emu;
+	epcm->substream = substream;
+	//snd_printk("epcm device=%d, channel_id=%d\n", substream->pcm->device, channel_id);
+
+	runtime->private_data = epcm;
+	runtime->private_free = snd_p16v_pcm_free_substream;
+  
+	runtime->hw = snd_p16v_capture_hw;
+
+	channel->emu = emu;
+	channel->number = channel_id;
+
+	channel->use=1;
+	//snd_printk("p16v: open channel_id=%d, channel=%p, use=0x%x\n", channel_id, channel, channel->use);
+	//printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
+	//channel->interrupt = snd_p16v_pcm_channel_interrupt;
+	channel->epcm=epcm;
+	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+
+	return 0;
+}
+
 
 /* close callback */
 static int snd_p16v_pcm_close_playback(snd_pcm_substream_t *substream)
 {
 	emu10k1_t *emu = snd_pcm_substream_chip(substream);
 	//snd_pcm_runtime_t *runtime = substream->runtime;
-        //emu10k1_pcm_t *epcm = runtime->private_data;
-        emu->p16v_voices[substream->pcm->device - emu->p16v_device_offset].use=0;
-/* FIXME: maybe zero others */
+	//emu10k1_pcm_t *epcm = runtime->private_data;
+	emu->p16v_voices[substream->pcm->device - emu->p16v_device_offset].use=0;
+	/* FIXME: maybe zero others */
+	return 0;
+}
+
+/* close callback */
+static int snd_p16v_pcm_close_capture(snd_pcm_substream_t *substream)
+{
+	emu10k1_t *emu = snd_pcm_substream_chip(substream);
+	//snd_pcm_runtime_t *runtime = substream->runtime;
+	//emu10k1_pcm_t *epcm = runtime->private_data;
+	emu->p16v_capture_voice.use=0;
+	/* FIXME: maybe zero others */
 	return 0;
 }
 
@@ -195,36 +263,55 @@ static int snd_p16v_pcm_open_playback_front(snd_pcm_substream_t *substream)
 	return snd_p16v_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
 }
 
+static int snd_p16v_pcm_open_capture(snd_pcm_substream_t *substream)
+{
+	// Only using channel 0 for now, but the card has 2 channels.
+	return snd_p16v_pcm_open_capture_channel(substream, 0);
+}
+
 /* hw_params callback */
 static int snd_p16v_pcm_hw_params_playback(snd_pcm_substream_t *substream,
 				      snd_pcm_hw_params_t * hw_params)
 {
 	int result;
-        //snd_printk("hw_params alloc: substream=%p\n", substream);
 	result = snd_pcm_lib_malloc_pages(substream,
 					params_buffer_bytes(hw_params));
-        //snd_printk("hw_params alloc: result=%d\n", result);
-	//dump_stack();
 	return result;
 }
 
+/* hw_params callback */
+static int snd_p16v_pcm_hw_params_capture(snd_pcm_substream_t *substream,
+				      snd_pcm_hw_params_t * hw_params)
+{
+	int result;
+	result = snd_pcm_lib_malloc_pages(substream,
+					params_buffer_bytes(hw_params));
+	return result;
+}
+
+
 /* hw_free callback */
 static int snd_p16v_pcm_hw_free_playback(snd_pcm_substream_t *substream)
 {
 	int result;
-        //snd_printk("hw_params free: substream=%p\n", substream);
 	result = snd_pcm_lib_free_pages(substream);
-        //snd_printk("hw_params free: result=%d\n", result);
-	//dump_stack();
 	return result;
 }
 
+/* hw_free callback */
+static int snd_p16v_pcm_hw_free_capture(snd_pcm_substream_t *substream)
+{
+	int result;
+	result = snd_pcm_lib_free_pages(substream);
+	return result;
+}
+
+
 /* prepare playback callback */
 static int snd_p16v_pcm_prepare_playback(snd_pcm_substream_t *substream)
 {
 	emu10k1_t *emu = snd_pcm_substream_chip(substream);
 	snd_pcm_runtime_t *runtime = substream->runtime;
-	//emu10k1_pcm_t *epcm = runtime->private_data;
 	int channel = substream->pcm->device - emu->p16v_device_offset;
 	u32 *table_base = (u32 *)(emu->p16v_buffer.area+(8*16*channel));
 	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
@@ -253,7 +340,7 @@ static int snd_p16v_pcm_prepare_playback(snd_pcm_substream_t *substream)
 	  break;
 	}
 	/* FIXME: Check emu->buffer.size before actually writing to it. */
-        for(i=0; i < runtime->periods; i++) {
+	for(i=0; i < runtime->periods; i++) {
 		table_base[i*2]=runtime->dma_addr+(i*period_size_bytes);
 		table_base[(i*2)+1]=period_size_bytes<<16;
 	}
@@ -270,6 +357,23 @@ static int snd_p16v_pcm_prepare_playback(snd_pcm_substream_t *substream)
 	return 0;
 }
 
+/* prepare capture callback */
+static int snd_p16v_pcm_prepare_capture(snd_pcm_substream_t *substream)
+{
+	emu10k1_t *emu = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int channel = substream->pcm->device - emu->p16v_device_offset;
+	//printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
+	snd_emu10k1_ptr20_write(emu, 0x13, channel, 0);
+	snd_emu10k1_ptr20_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
+	snd_emu10k1_ptr20_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
+	snd_emu10k1_ptr20_write(emu, CAPTURE_POINTER, channel, 0);
+	//snd_emu10k1_ptr20_write(emu, CAPTURE_SOURCE, 0x0, 0x333300e4); /* Select MIC or Line in */
+	//snd_emu10k1_ptr20_write(emu, EXTENDED_INT_MASK, 0, snd_emu10k1_ptr20_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
+
+	return 0;
+}
+
 static void snd_p16v_intr_enable(emu10k1_t *emu, unsigned int intrenb)
 {
 	unsigned long flags;
@@ -345,6 +449,36 @@ static int snd_p16v_pcm_trigger_playback(snd_pcm_substream_t *substream,
 	return result;
 }
 
+/* trigger_capture callback */
+static int snd_p16v_pcm_trigger_capture(snd_pcm_substream_t *substream,
+                                   int cmd)
+{
+	emu10k1_t *emu = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	emu10k1_pcm_t *epcm = runtime->private_data;
+	int channel = 0;
+	int result = 0;
+	u32 inte = INTE2_CAPTURE_CH_0_LOOP | INTE2_CAPTURE_CH_0_HALF_LOOP;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_p16v_intr_enable(emu, inte);
+		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
+		epcm->running = 1;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
+		snd_p16v_intr_disable(emu, inte);
+		//snd_emu10k1_ptr20_write(emu, EXTENDED_INT_MASK, 0, snd_emu10k1_ptr20_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
+		epcm->running = 0;
+		break;
+	default:
+		result = -EINVAL;
+		break;
+	}
+	return result;
+}
+
 /* pointer_playback callback */
 static snd_pcm_uframes_t
 snd_p16v_pcm_pointer_playback(snd_pcm_substream_t *substream)
@@ -370,6 +504,31 @@ snd_p16v_pcm_pointer_playback(snd_pcm_substream_t *substream)
 	return ptr;
 }
 
+/* pointer_capture callback */
+static snd_pcm_uframes_t
+snd_p16v_pcm_pointer_capture(snd_pcm_substream_t *substream)
+{
+	emu10k1_t *emu = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	emu10k1_pcm_t *epcm = runtime->private_data;
+	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
+	int channel = 0;
+
+	if (!epcm->running)
+		return 0;
+
+	ptr1 = snd_emu10k1_ptr20_read(emu, CAPTURE_POINTER, channel);
+	ptr2 = bytes_to_frames(runtime, ptr1);
+	ptr=ptr2;
+	if (ptr >= runtime->buffer_size) {
+		ptr -= runtime->buffer_size;
+		printk("buffer capture limited!\n");
+	}
+	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);
+
+	return ptr;
+}
+
 /* operators */
 static snd_pcm_ops_t snd_p16v_playback_front_ops = {
 	.open =        snd_p16v_pcm_open_playback_front,
@@ -382,6 +541,18 @@ static snd_pcm_ops_t snd_p16v_playback_front_ops = {
 	.pointer =     snd_p16v_pcm_pointer_playback,
 };
 
+static snd_pcm_ops_t snd_p16v_capture_ops = {
+	.open =        snd_p16v_pcm_open_capture,
+	.close =       snd_p16v_pcm_close_capture,
+	.ioctl =       snd_pcm_lib_ioctl,
+	.hw_params =   snd_p16v_pcm_hw_params_capture,
+	.hw_free =     snd_p16v_pcm_hw_free_capture,
+	.prepare =     snd_p16v_pcm_prepare_capture,
+	.trigger =     snd_p16v_pcm_trigger_capture,
+	.pointer =     snd_p16v_pcm_pointer_capture,
+};
+
+
 int snd_p16v_free(emu10k1_t *chip)
 {
 	// release the data
@@ -405,20 +576,22 @@ int snd_p16v_pcm(emu10k1_t *emu, int device, snd_pcm_t **rpcm)
 	snd_pcm_t *pcm;
 	snd_pcm_substream_t *substream;
 	int err;
-        int capture=0;
+        int capture=1;
   
 	//snd_printk("snd_p16v_pcm called. device=%d\n", device);
 	emu->p16v_device_offset = device;
 	if (rpcm)
 		*rpcm = NULL;
-        //if (device == 0) capture=1; 
+
 	if ((err = snd_pcm_new(emu->card, "p16v", device, 1, capture, &pcm)) < 0)
 		return err;
   
 	pcm->private_data = emu;
 	pcm->private_free = snd_p16v_pcm_free;
-
+	// Single playback 8 channel device.
+	// Single capture 2 channel device.
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_p16v_playback_front_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_p16v_capture_ops);
 
 	pcm->info_flags = 0;
 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
@@ -694,6 +867,56 @@ static snd_kcontrol_new_t snd_p16v_volume_control_spdif_rear =
         .put =          snd_p16v_volume_put_spdif_rear
 };
 
+static int snd_p16v_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+	static char *texts[8] = { "SPDIF", "I2S", "SRC48", "SRCMulti_SPDIF", "SRCMulti_I2S", "CDIF", "FX", "AC97" };
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = 8;
+	if (uinfo->value.enumerated.item > 7)
+                uinfo->value.enumerated.item = 7;
+	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int snd_p16v_capture_source_get(snd_kcontrol_t * kcontrol,
+					snd_ctl_elem_value_t * ucontrol)
+{
+	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
+
+	ucontrol->value.enumerated.item[0] = emu->p16v_capture_source;
+	return 0;
+}
+
+static int snd_p16v_capture_source_put(snd_kcontrol_t * kcontrol,
+					snd_ctl_elem_value_t * ucontrol)
+{
+	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
+	unsigned int val;
+	int change = 0;
+	u32 mask;
+	u32 source;
+
+	val = ucontrol->value.enumerated.item[0] ;
+	change = (emu->p16v_capture_source != val);
+	if (change) {
+		emu->p16v_capture_source = val;
+		source = (val << 28) | (val << 24) | (val << 20) | (val << 16);
+		mask = snd_emu10k1_ptr20_read(emu, BASIC_INTERRUPT, 0) & 0xffff;
+		snd_emu10k1_ptr20_write(emu, BASIC_INTERRUPT, 0, source | mask);
+	}
+        return change;
+}
+
+static snd_kcontrol_new_t snd_p16v_capture_source __devinitdata =
+{
+	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name =		"HD Capture source",
+	.info =		snd_p16v_capture_source_info,
+	.get =		snd_p16v_capture_source_get,
+	.put =		snd_p16v_capture_source_put
+};
 int snd_p16v_mixer(emu10k1_t *emu)
 {
         int err;
@@ -731,6 +954,10 @@ int snd_p16v_mixer(emu10k1_t *emu)
                 return -ENOMEM;
         if ((err = snd_ctl_add(card, kctl)))
                 return err;
+        if ((kctl = snd_ctl_new1(&snd_p16v_capture_source, emu)) == NULL)
+                return -ENOMEM;
+        if ((err = snd_ctl_add(card, kctl)))
+                return err;
         return 0;
 }