patch-2.1.29 linux/drivers/sbus/audio/audio.h

• Lines: 299
• Date: Wed Mar 5 17:04:32 1997
• Orig file: v2.1.28/linux/drivers/sbus/audio/audio.h
• Orig date: Sun Jan 26 02:07:17 1997

diff -u --recursive --new-file v2.1.28/linux/drivers/sbus/audio/audio.h linux/drivers/sbus/audio/audio.h
@@ -8,29 +8,246 @@
 #ifndef _AUDIO_H_
 #define _AUDIO_H_
 
+/*
+ *	SunOS/Solaris /dev/audio interface
+ */
+
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/ioctl.h>
+
+/*
+ * This structure contains state information for audio device IO streams.
+ */
+typedef struct audio_prinfo {
+	/*
+	 * The following values describe the audio data encoding.
+	 */
+	unsigned int sample_rate;	/* samples per second */
+	unsigned int channels;	/* number of interleaved channels */
+	unsigned int precision;	/* bit-width of each sample */
+	unsigned int encoding;	/* data encoding method */
+
+	/*
+	 * The following values control audio device configuration
+	 */
+	unsigned int gain;		/* gain level: 0 - 255 */
+	unsigned int port;		/* selected I/O port (see below) */
+	unsigned int avail_ports;	/* available I/O ports (see below) */
+	unsigned int _xxx[2];		/* Reserved for future use */
+
+	unsigned int buffer_size;	/* I/O buffer size */
+
+	/*
+	 * The following values describe driver state
+	 */
+	unsigned int samples;		/* number of samples converted */
+	unsigned int eof;		/* End Of File counter (play only) */
+
+	unsigned char	pause;		/* non-zero for pause, zero to resume */
+	unsigned char	error;		/* non-zero if overflow/underflow */
+	unsigned char	waiting;	/* non-zero if a process wants access */
+	unsigned char balance;	/* stereo channel balance */
+
+	unsigned short minordev;
+
+	/*
+	 * The following values are read-only state flags
+	 */
+	unsigned char open;		/* non-zero if open access permitted */
+	unsigned char active;		/* non-zero if I/O is active */
+} audio_prinfo_t;
+
+
+/*
+ * This structure describes the current state of the audio device.
+ */
+typedef struct audio_info {
+	/*
+	 * Per-stream information
+	 */
+	audio_prinfo_t play;	/* output status information */
+	audio_prinfo_t record;	/* input status information */
+
+	/*
+	 * Per-unit/channel information
+	 */
+	unsigned int monitor_gain;	/* input to output mix: 0 - 255 */
+	unsigned char output_muted;	/* non-zero if output is muted */
+	unsigned char _xxx[3];	/* Reserved for future use */
+	unsigned int _yyy[3];		/* Reserved for future use */
+} audio_info_t;
+
+
+/*
+ * Audio encoding types
+ */
+#define	AUDIO_ENCODING_NONE	(0)	/* no encoding assigned	*/
+#define	AUDIO_ENCODING_ULAW	(1)	/* u-law encoding	*/
+#define	AUDIO_ENCODING_ALAW	(2)	/* A-law encoding	*/
+#define	AUDIO_ENCODING_LINEAR	(3)	/* Linear PCM encoding	*/
+#define	AUDIO_ENCODING_DVI	(104)	/* DVI ADPCM		*/
+#define	AUDIO_ENCODING_LINEAR8	(105)	/* 8 bit UNSIGNED	*/
+
+/*
+ * These ranges apply to record, play, and monitor gain values
+ */
+#define	AUDIO_MIN_GAIN	(0)	/* minimum gain value */
+#define	AUDIO_MAX_GAIN	(255)	/* maximum gain value */
+
+/*
+ * These values apply to the balance field to adjust channel gain values
+ */
+#define	AUDIO_LEFT_BALANCE	(0)	/* left channel only	*/
+#define	AUDIO_MID_BALANCE	(32)	/* equal left/right channel */
+#define	AUDIO_RIGHT_BALANCE	(64)	/* right channel only	*/
+#define	AUDIO_BALANCE_SHIFT	(3)
+
+/*
+ * Generic minimum/maximum limits for number of channels, both modes
+ */
+#define	AUDIO_MIN_PLAY_CHANNELS	(1)
+#define	AUDIO_MAX_PLAY_CHANNELS	(4)
+#define	AUDIO_MIN_REC_CHANNELS	(1)
+#define	AUDIO_MAX_REC_CHANNELS	(4)
+
+/*
+ * Generic minimum/maximum limits for sample precision
+ */
+#define	AUDIO_MIN_PLAY_PRECISION	(8)
+#define	AUDIO_MAX_PLAY_PRECISION	(32)
+#define	AUDIO_MIN_REC_PRECISION		(8)
+#define	AUDIO_MAX_REC_PRECISION		(32)
+
+/*
+ * Define some convenient names for typical audio ports
+ */
+/*
+ * output ports (several may be enabled simultaneously)
+ */
+#define	AUDIO_SPEAKER		0x01	/* output to built-in speaker */
+#define	AUDIO_HEADPHONE		0x02	/* output to headphone jack */
+#define	AUDIO_LINE_OUT		0x04	/* output to line out	 */
+
+/*
+ * input ports (usually only one at a time)
+ */
+#define	AUDIO_MICROPHONE	0x01	/* input from microphone */
+#define	AUDIO_LINE_IN		0x02	/* input from line in	 */
+#define	AUDIO_CD		0x04	/* input from on-board CD inputs */
+#define	AUDIO_INTERNAL_CD_IN	AUDIO_CD	/* input from internal CDROM */
+
+
+/*
+ * This macro initializes an audio_info structure to 'harmless' values.
+ * Note that (~0) might not be a harmless value for a flag that was
+ * a signed int.
+ */
+#define	AUDIO_INITINFO(i)	{					\
+	unsigned int	*__x__;						\
+	for (__x__ = (unsigned int *)(i);				\
+	    (char *) __x__ < (((char *)(i)) + sizeof (audio_info_t));	\
+	    *__x__++ = ~0);						\
+}
+
+
+/*
+ * Parameter for the AUDIO_GETDEV ioctl to determine current
+ * audio devices.
+ */
+#define	MAX_AUDIO_DEV_LEN	(16)
+typedef struct audio_device {
+	char name[MAX_AUDIO_DEV_LEN];
+	char version[MAX_AUDIO_DEV_LEN];
+	char config[MAX_AUDIO_DEV_LEN];
+} audio_device_t;
+
+
+/*
+ * Ioctl calls for the audio device.
+ */
+
+/*
+ * AUDIO_GETINFO retrieves the current state of the audio device.
+ *
+ * AUDIO_SETINFO copies all fields of the audio_info structure whose
+ * values are not set to the initialized value (-1) to the device state.
+ * It performs an implicit AUDIO_GETINFO to return the new state of the
+ * device.  Note that the record.samples and play.samples fields are set
+ * to the last value before the AUDIO_SETINFO took effect.  This allows
+ * an application to reset the counters while atomically retrieving the
+ * last value.
+ *
+ * AUDIO_DRAIN suspends the calling process until the write buffers are
+ * empty.
+ *
+ * AUDIO_GETDEV returns a structure of type audio_device_t which contains
+ * three strings.  The string "name" is a short identifying string (for
+ * example, the SBus Fcode name string), the string "version" identifies
+ * the current version of the device, and the "config" string identifies
+ * the specific configuration of the audio stream.  All fields are
+ * device-dependent -- see the device specific manual pages for details.
+ */
+#define	AUDIO_GETINFO	_IOR('A', 1, audio_info_t)
+#define	AUDIO_SETINFO	_IOWR('A', 2, audio_info_t)
+#define	AUDIO_DRAIN	_IO('A', 3)
+#define	AUDIO_GETDEV	_IOR('A', 4, audio_device_t)
+
+/*
+ * The following ioctl sets the audio device into an internal loopback mode,
+ * if the hardware supports this.  The argument is TRUE to set loopback,
+ * FALSE to reset to normal operation.  If the hardware does not support
+ * internal loopback, the ioctl should fail with EINVAL.
+ */
+#define	AUDIO_DIAG_LOOPBACK	_IOW('A', 101, int)
+
+#ifdef notneeded
+/*
+ * Structure sent up as a M_PROTO message on trace streams
+ */
+typedef struct audtrace_hdr audtrace_hdr_t;
+struct audtrace_hdr {
+	unsigned int seq;		/* Sequence number (per-aud_stream) */
+	int type;		/* device-dependent */
+	struct timeval timestamp;
+	char _f[8];		/* filler */
+};
+#endif
+
+
+
+/*
+ *	Linux kernel internal implementation.
+ */
+
 #ifdef __KERNEL__
 
 #include <linux/types.h>
 #include <linux/fs.h>
+#include <linux/tqueue.h>
 #include <linux/wait.h>
 
-
-#define NR_SPARCAUDIO_DRIVERS 1
-
+#define	SDF_OPEN_WRITE	0x00000001
+#define	SDF_OPEN_READ	0x00000002
 
 struct sparcaudio_driver
 {
 	const char * name;
 	struct sparcaudio_operations *ops;
 	void *private;
+	unsigned long flags;
 
-	/* Nonzero if the driver is busy. */
-	int busy;
+	/* Processes blocked on open() sit here. */
+	struct wait_queue *open_wait;
+
+	/* Task queue for this driver's bottom half. */
+	struct tq_struct tqueue;
 
 	/* Support for a circular queue of output buffers. */
 	__u8 **output_buffers;
 	size_t *output_sizes;
-	int num_output_buffers, output_front, output_rear, output_count, output_active;
+	int num_output_buffers, output_front, output_rear;
+	int output_count, output_active;
 	struct wait_queue *output_write_wait, *output_drain_wait;
 };
 
@@ -42,33 +259,28 @@
 		     struct sparcaudio_driver *);
 
 	/* Ask driver to begin playing a buffer. */
-	void (*start_output)(struct sparcaudio_driver *, __u8 * buffer, size_t count);
+	void (*start_output)(struct sparcaudio_driver *, __u8 *, unsigned long);
 
 	/* Ask driver to stop playing a buffer. */
 	void (*stop_output)(struct sparcaudio_driver *);
 
-	/* Set and get the audio encoding method. */
-	int (*set_encoding)(int encoding);
-	int (*get_encoding)(void);
-
-	/* Set and get the audio sampling rate (samples per second). */
-	int (*set_sampling_rate)(int sampling_rate);
-	int (*get_sampling_rate)(void);
-
-	/* Set and get the audio output port. */
-	int (*set_output_port)(int output_port);
-	int (*get_output_port)(void);
-
-	/* Set and get the audio input port. */
-	int (*set_input_port)(int input_port);
-	int (*get_input_port)(void);
+	/* Ask driver to begin recording into a buffer. */
+	void (*start_input)(struct sparcaudio_driver *, __u8 *, unsigned long);
+
+	/* Ask driver to stop recording. */
+	void (*stop_input)(struct sparcaudio_driver *);
+
+	/* Return driver name/version to caller. (/dev/audio specific) */
+	void (*sunaudio_getdev)(struct sparcaudio_driver *, audio_device_t *);
 };
 
 extern int register_sparcaudio_driver(struct sparcaudio_driver *);
 extern int unregister_sparcaudio_driver(struct sparcaudio_driver *);
-extern void sparcaudio_output_done(void);
+extern void sparcaudio_output_done(struct sparcaudio_driver *);
+extern void sparcaudio_input_done(struct sparcaudio_driver *);
 extern int sparcaudio_init(void);
 extern int amd7930_init(void);
+extern int cs4231_init(void);
 
 #endif