summaryrefslogtreecommitdiffstats
path: root/drivers/usb/gadget/function/u_uac1_legacy.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/gadget/function/u_uac1_legacy.h')
-rw-r--r--drivers/usb/gadget/function/u_uac1_legacy.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_uac1_legacy.h b/drivers/usb/gadget/function/u_uac1_legacy.h
new file mode 100644
index 000000000000..d715b1af56a4
--- /dev/null
+++ b/drivers/usb/gadget/function/u_uac1_legacy.h
@@ -0,0 +1,82 @@
+/*
+ * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities
+ *
+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
+ * Copyright (C) 2008 Analog Devices, Inc
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __U_UAC1_LEGACY_H
+#define __U_UAC1_LEGACY_H
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/composite.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
+#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
+#define FILE_CONTROL "/dev/snd/controlC0"
+
+#define UAC1_OUT_EP_MAX_PACKET_SIZE 200
+#define UAC1_REQ_COUNT 256
+#define UAC1_AUDIO_BUF_SIZE 48000
+
+/*
+ * This represents the USB side of an audio card device, managed by a USB
+ * function which provides control and stream interfaces.
+ */
+
+struct gaudio_snd_dev {
+ struct gaudio *card;
+ struct file *filp;
+ struct snd_pcm_substream *substream;
+ int access;
+ int format;
+ int channels;
+ int rate;
+};
+
+struct gaudio {
+ struct usb_function func;
+ struct usb_gadget *gadget;
+
+ /* ALSA sound device interfaces */
+ struct gaudio_snd_dev control;
+ struct gaudio_snd_dev playback;
+ struct gaudio_snd_dev capture;
+
+ /* TODO */
+};
+
+struct f_uac1_legacy_opts {
+ struct usb_function_instance func_inst;
+ int req_buf_size;
+ int req_count;
+ int audio_buf_size;
+ char *fn_play;
+ char *fn_cap;
+ char *fn_cntl;
+ unsigned bound:1;
+ unsigned fn_play_alloc:1;
+ unsigned fn_cap_alloc:1;
+ unsigned fn_cntl_alloc:1;
+ struct mutex lock;
+ int refcnt;
+};
+
+int gaudio_setup(struct gaudio *card);
+void gaudio_cleanup(struct gaudio *the_card);
+
+size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
+int u_audio_get_playback_channels(struct gaudio *card);
+int u_audio_get_playback_rate(struct gaudio *card);
+
+#endif /* __U_UAC1_LEGACY_H */