echoaudio.h

linux 内核源代码

/****************************************************************************

   Copyright Echo Digital Audio Corporation (c) 1998 - 2004
   All rights reserved
   www.echoaudio.com

   This file is part of Echo Digital Audio's generic driver library.

   Echo Digital Audio's generic driver library 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.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   MA  02111-1307, USA.

 ****************************************************************************

 Translation from C++ and adaptation for use in ALSA-Driver
 were made by Giuliano Pochini <[e-mail]>

 ****************************************************************************


   Here's a block diagram of how most of the cards work:

                  +-----------+
           record |           |<-------------------- Inputs
          <-------|           |        |
     PCI          | Transport |        |
     bus          |  engine   |       \|/
          ------->|           |    +-------+
            play  |           |--->|monitor|-------> Outputs
                  +-----------+    | mixer |
                                   +-------+

   The lines going to and from the PCI bus represent "pipes".  A pipe performs
   audio transport - moving audio data to and from buffers on the host via
   bus mastering.

   The inputs and outputs on the right represent input and output "busses."
   A bus is a physical, real connection to the outside world.  An example
   of a bus would be the 1/4" analog connectors on the back of Layla or
   an RCA S/PDIF connector.

   For most cards, there is a one-to-one correspondence between outputs
   and busses; that is, each individual pipe is hard-wired to a single bus.

   Cards that work this way are Darla20, Gina20, Layla20, Darla24, Gina24,
   Layla24, Mona, and Indigo.


   Mia has a feature called "virtual outputs."


                  +-----------+
           record |           |<----------------------------- Inputs
          <-------|           |                  |
     PCI          | Transport |                  |
     bus          |  engine   |                 \|/
          ------->|           |   +------+   +-------+
            play  |           |-->|vmixer|-->|monitor|-------> Outputs
                  +-----------+   +------+   | mixer |
                                             +-------+


   Obviously, the difference here is the box labeled "vmixer."  Vmixer is
   short for "virtual output mixer."  For Mia, pipes are *not* hard-wired
   to a single bus; the vmixer lets you mix any pipe to any bus in any
   combination.

   Note, however, that the left-hand side of the diagram is unchanged.
   Transport works exactly the same way - the difference is in the mixer stage.


   Pipes and busses are numbered starting at zero.



   Pipe index
   ==========

   A number of calls in CEchoGals refer to a "pipe index".  A pipe index is
   a unique number for a pipe that unambiguously refers to a playback or record
   pipe.  Pipe indices are numbered starting with analog outputs, followed by
   digital outputs, then analog inputs, then digital inputs.

   Take Gina24 as an example:

   Pipe index

   0-7            Analog outputs (0 .. FirstDigitalBusOut-1)
   8-15           Digital outputs (FirstDigitalBusOut .. NumBussesOut-1)
   16-17          Analog inputs
   18-25          Digital inputs


   You get the pipe index by calling CEchoGals::OpenAudio; the other transport
   functions take the pipe index as a parameter.  If you need a pipe index for
   some other reason, use the handy Makepipe_index method.


   Some calls take a CChannelMask parameter; CChannelMask is a handy way to
   group pipe indices.



   Digital mode switch
   ===================

   Some cards (right now, Gina24, Layla24, and Mona) have a Digital Mode Switch
   or DMS.  Cards with a DMS can be set to one of three mutually exclusive
   digital modes: S/PDIF RCA, S/PDIF optical, or ADAT optical.

   This may create some confusion since ADAT optical is 8 channels wide and
   S/PDIF is only two channels wide.  Gina24, Layla24, and Mona handle this
   by acting as if they always have 8 digital outs and ins.  If you are in
   either S/PDIF mode, the last 6 channels don't do anything - data sent
   out these channels is thrown away and you will always record zeros.

   Note that with Gina24, Layla24, and Mona, sample rates above 50 kHz are
   only available if you have the card configured for S/PDIF optical or S/PDIF
   RCA.



   Double speed mode
   =================

   Some of the cards support 88.2 kHz and 96 kHz sampling (Darla24, Gina24,
   Layla24, Mona, Mia, and Indigo).  For these cards, the driver sometimes has
   to worry about "double speed mode"; double speed mode applies whenever the
   sampling rate is above 50 kHz.

   For instance, Mona and Layla24 support word clock sync.  However, they
   actually support two different word clock modes - single speed (below
   50 kHz) and double speed (above 50 kHz).  The hardware detects if a single
   or double speed word clock signal is present; the generic code uses that
   information to determine which mode to use.

   The generic code takes care of all this for you.
*/


#ifndef _ECHOAUDIO_H_
#define _ECHOAUDIO_H_


#define TRUE 1
#define FALSE 0

#include "echoaudio_dsp.h"



/***********************************************************************

	PCI configuration space

***********************************************************************/

/*
 * PCI vendor ID and device IDs for the hardware
 */
#define VENDOR_ID		0x1057
#define DEVICE_ID_56301		0x1801
#define DEVICE_ID_56361		0x3410
#define SUBVENDOR_ID		0xECC0


/*
 * Valid Echo PCI subsystem card IDs
 */
#define DARLA20			0x0010
#define GINA20			0x0020
#define LAYLA20			0x0030
#define DARLA24			0x0040
#define GINA24			0x0050
#define LAYLA24			0x0060
#define MONA			0x0070
#define MIA			0x0080
#define INDIGO			0x0090
#define INDIGO_IO		0x00a0
#define INDIGO_DJ		0x00b0
#define ECHO3G			0x0100


/************************************************************************

	Array sizes and so forth

***********************************************************************/

/*
 * Sizes
 */
#define ECHO_MAXAUDIOINPUTS	32	/* Max audio input channels */
#define ECHO_MAXAUDIOOUTPUTS	32	/* Max audio output channels */
#define ECHO_MAXAUDIOPIPES	32	/* Max number of input and output
					 * pipes */
#define E3G_MAX_OUTPUTS		16
#define ECHO_MAXMIDIJACKS	1	/* Max MIDI ports */
#define ECHO_MIDI_QUEUE_SZ 	512	/* Max MIDI input queue entries */
#define ECHO_MTC_QUEUE_SZ	32	/* Max MIDI time code input queue
					 * entries */

/*
 * MIDI activity indicator timeout
 */
#define MIDI_ACTIVITY_TIMEOUT_USEC	200000


/****************************************************************************
 
   Clocks

*****************************************************************************/

/*
 * Clock numbers
 */
#define ECHO_CLOCK_INTERNAL		0
#define ECHO_CLOCK_WORD			1
#define ECHO_CLOCK_SUPER		2
#define ECHO_CLOCK_SPDIF		3
#define ECHO_CLOCK_ADAT			4
#define ECHO_CLOCK_ESYNC		5
#define ECHO_CLOCK_ESYNC96		6
#define ECHO_CLOCK_MTC			7
#define ECHO_CLOCK_NUMBER		8
#define ECHO_CLOCKS			0xffff

/*
 * Clock bit numbers - used to report capabilities and whatever clocks
 * are being detected dynamically.
 */
#define ECHO_CLOCK_BIT_INTERNAL		(1 << ECHO_CLOCK_INTERNAL)
#define ECHO_CLOCK_BIT_WORD		(1 << ECHO_CLOCK_WORD)
#define ECHO_CLOCK_BIT_SUPER		(1 << ECHO_CLOCK_SUPER)
#define ECHO_CLOCK_BIT_SPDIF		(1 << ECHO_CLOCK_SPDIF)
#define ECHO_CLOCK_BIT_ADAT		(1 << ECHO_CLOCK_ADAT)
#define ECHO_CLOCK_BIT_ESYNC		(1 << ECHO_CLOCK_ESYNC)
#define ECHO_CLOCK_BIT_ESYNC96		(1 << ECHO_CLOCK_ESYNC96)
#define ECHO_CLOCK_BIT_MTC		(1<<ECHO_CLOCK_MTC)


/***************************************************************************

   Digital modes

****************************************************************************/

/*
 * Digital modes for Mona, Layla24, and Gina24
 */
#define DIGITAL_MODE_NONE			0xFF
#define DIGITAL_MODE_SPDIF_RCA			0
#define DIGITAL_MODE_SPDIF_OPTICAL		1
#define DIGITAL_MODE_ADAT			2
#define DIGITAL_MODE_SPDIF_CDROM		3
#define DIGITAL_MODES				4

/*
 * Digital mode capability masks
 */
#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_RCA	(1 << DIGITAL_MODE_SPDIF_RCA)
#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_OPTICAL	(1 << DIGITAL_MODE_SPDIF_OPTICAL)
#define ECHOCAPS_HAS_DIGITAL_MODE_ADAT		(1 << DIGITAL_MODE_ADAT)
#define ECHOCAPS_HAS_DIGITAL_MODE_SPDIF_CDROM	(1 << DIGITAL_MODE_SPDIF_CDROM)


#define EXT_3GBOX_NC			0x01	/* 3G box not connected */
#define EXT_3GBOX_NOT_SET		0x02	/* 3G box not detected yet */


#define ECHOGAIN_MUTED		(-128)	/* Minimum possible gain */
#define ECHOGAIN_MINOUT		(-128)	/* Min output gain (dB) */
#define ECHOGAIN_MAXOUT		(6)	/* Max output gain (dB) */
#define ECHOGAIN_MININP		(-50)	/* Min input gain (0.5 dB) */
#define ECHOGAIN_MAXINP		(50)	/* Max input gain (0.5 dB) */

#define PIPE_STATE_STOPPED	0	/* Pipe has been reset */
#define PIPE_STATE_PAUSED	1	/* Pipe has been stopped */
#define PIPE_STATE_STARTED	2	/* Pipe has been started */
#define PIPE_STATE_PENDING	3	/* Pipe has pending start */


/* Debug initialization */
#ifdef CONFIG_SND_DEBUG