1 files changed, 76 insertions, 0 deletions
diff --git a/sound/usb/6fire/pcm.h b/sound/usb/6fire/pcm.h
new file mode 100644
index 000000000000..2bee81374002
--- /dev/null
+++ b/sound/usb/6fire/pcm.h
@@ -0,0 +1,76 @@
+/*
+ * Linux driver for TerraTec DMX 6Fire USB
+ *
+ * Author:	Torsten Schenk <torsten.schenk@zoho.com>
+ * Created:	Jan 01, 2011
+ * Version:	0.3.0
+ * Copyright:	(C) Torsten Schenk
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef USB6FIRE_PCM_H
+#define USB6FIRE_PCM_H
+
+#include <sound/pcm.h>
+#include <linux/mutex.h>
+
+#include "common.h"
+
+enum /* settings for pcm */
+{
+	/* maximum of EP_W_MAX_PACKET_SIZE[] (see firmware.c) */
+	PCM_N_URBS = 16, PCM_N_PACKETS_PER_URB = 8, PCM_MAX_PACKET_SIZE = 604
+};
+
+struct pcm_urb {
+	struct sfire_chip *chip;
+
+	/* BEGIN DO NOT SEPARATE */
+	struct urb instance;
+	struct usb_iso_packet_descriptor packets[PCM_N_PACKETS_PER_URB];
+	/* END DO NOT SEPARATE */
+	u8 buffer[PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE];
+
+	struct pcm_urb *peer;
+};
+
+struct pcm_substream {
+	spinlock_t lock;
+	struct snd_pcm_substream *instance;
+
+	bool active;
+
+	snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */
+	snd_pcm_uframes_t period_off; /* current position in current period */
+};
+
+struct pcm_runtime {
+	struct sfire_chip *chip;
+	struct snd_pcm *instance;
+
+	struct pcm_substream playback;
+	struct pcm_substream capture;
+	bool panic; /* if set driver won't do anymore pcm on device */
+
+	struct pcm_urb in_urbs[PCM_N_URBS];
+	struct pcm_urb out_urbs[PCM_N_URBS];
+	int in_packet_size;
+	int out_packet_size;
+	int in_n_analog; /* number of analog channels soundcard sends */
+	int out_n_analog; /* number of analog channels soundcard receives */
+
+	struct mutex stream_mutex;
+	u8 stream_state; /* one of STREAM_XXX (pcm.c) */
+	u8 rate; /* one of PCM_RATE_XXX */
+	wait_queue_head_t stream_wait_queue;
+	bool stream_wait_cond;
+};
+
+int __devinit usb6fire_pcm_init(struct sfire_chip *chip);
+void usb6fire_pcm_abort(struct sfire_chip *chip);
+void usb6fire_pcm_destroy(struct sfire_chip *chip);
+#endif /* USB6FIRE_PCM_H */