ALSA: fireworks: Add PCM interface

This commit adds a functionality to capture/playback PCM samples.

When AMDTP stream is already running for PCM or the source of clock is not
internal, available sampling rate is limited at current one.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/Kconfig

@@ -65,6 +65,7 @@ config SND_FIREWORKS
 	tristate "Echo Fireworks board module support"
 	select SND_FIREWIRE_LIB
 	select SND_RAWMIDI
+	select SND_PCM
 	help
 	  Say Y here to include support for FireWire devices based
 	  on Echo Digital Audio Fireworks board:

sound/firewire/fireworks/Makefile

@@ -1,4 +1,4 @@
 snd-fireworks-objs := fireworks_transaction.o fireworks_command.o \
 		      fireworks_stream.o fireworks_proc.o fireworks_midi.o \
-		      fireworks.o
+		      fireworks_pcm.o fireworks.o
 obj-m += snd-fireworks.o

sound/firewire/fireworks/fireworks.c

@@ -232,6 +232,10 @@ efw_probe(struct fw_unit *unit,
 			goto error;
 	}
 
+	err = snd_efw_create_pcm_devices(efw);
+	if (err < 0)
+		goto error;
+
 	err = snd_efw_stream_init_duplex(efw);
 	if (err < 0)
 		goto error;

sound/firewire/fireworks/fireworks.h

@@ -23,6 +23,7 @@
 #include <sound/pcm.h>
 #include <sound/info.h>
 #include <sound/rawmidi.h>
+#include <sound/pcm_params.h>
 
 #include "../packets-buffer.h"
 #include "../iso-resources.h"
@@ -201,6 +202,9 @@ void snd_efw_proc_init(struct snd_efw *efw);
 
 int snd_efw_create_midi_devices(struct snd_efw *efw);
 
+int snd_efw_create_pcm_devices(struct snd_efw *efw);
+int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode);
+
 #define SND_EFW_DEV_ENTRY(vendor, model) \
 { \
 	.match_flags	= IEEE1394_MATCH_VENDOR_ID | \