first usable version of kernel and commands

After an year of hard work, this is a first "usable" version of Jehanne.

sys/include/usb/audio.h

@@ -0,0 +1,93 @@
+/*
+ * This file is part of the UCB release of Plan 9. It is subject to the license
+ * terms in the LICENSE file found in the top-level directory of this
+ * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
+ * part of the UCB release of Plan 9, including this file, may be copied,
+ * modified, propagated, or distributed except according to the terms contained
+ * in the LICENSE file.
+ */
+
+enum {
+	master_chan		= 0x00,
+	Speed_control		= 0x00,
+	/* Items below are  defined by USB standard: */
+	Mute_control		= 0x01,
+	Volume_control		= 0x02,
+	Bass_control		= 0x03,
+	Mid_control		= 0x04,
+	Treble_control		= 0x05,
+	Equalizer_control	= 0x06,
+	Agc_control		= 0x07,
+	Delay_control		= 0x08,
+	Bassboost_control	= 0x09,
+	Loudness_control	= 0x0a,
+	/* Items below are defined by implementation: */
+	Channel_control		= 0x0b,
+	Resolution_control	= 0x0c,
+	Ncontrol,
+	Selector_control	= 0x0d,
+
+	sampling_freq_control	= 0x01,
+
+	Audiocsp = 0x000101, /* audio.control.0 */
+
+	AUDIO_INTERFACE = 0x24,
+	AUDIO_ENDPOINT = 0x25,
+};
+
+
+#define AS_GENERAL 1
+#define FORMAT_TYPE 2
+#define FORMAT_SPECIFIC 3
+
+#define PCM 1
+#define PCM8 2
+#define IEEE_FLOAT 3
+#define ALAW 4
+#define MULAW 5
+
+#define SAMPLING_FREQ_CONTROL 0x01
+
+typedef struct Audioalt Audioalt;
+
+struct Audioalt {
+	int		nchan;
+	int		res;
+	int		subframesize;
+	int		minfreq, maxfreq;	/* continuous freqs */
+	int		freqs[8];		/* discrete freqs */
+	int		caps;		/* see below for meanings */
+};
+
+enum {
+	/* Audioalt->caps bits */
+	has_setspeed = 0x1,		/* has a speed_set command */
+	has_pitchset = 0x2,		/* has a pitch_set command */
+	has_contfreq = 0x4,		/* frequency continuously variable */
+	has_discfreq = 0x8,		/* discrete set of frequencies */
+	onefreq = 0x10,		/* only one frequency */
+	maxpkt_only = 0x80,	/* packets must be padded to max size */
+};
+
+typedef uint8_t byte;
+
+extern int setrec;
+extern int verbose;
+extern int defaultspeed[2];
+extern Dev *ad;
+extern Dev *buttondev;
+extern Channel *controlchan;
+extern Dev *epdev[2];
+
+void	audio_interface(Dev *d, Desc *dd);
+void	setalt(Dev *d, int endpt, int value);
+int	getalt(Dev *d, int endpt);
+int	setspeed(int rec, int speed);
+int	setcontrol(int rec, char *name, int32_t *value);
+int	getspecialcontrol(int rec, int ctl, int req, int32_t *value);
+int	getcontrol(int rec, char *name, int32_t *value);
+int	findalt(int rec, int nchan, int res, int speed);
+void	getcontrols(void);
+void	serve(void *);
+int	nbchanprint(Channel *c, char *fmt, ...);
+int	Aconv(Fmt *fp);