pci/echoaudio/echoaudio_dsp.h

3    Copyright Echo Digital Audio Corporation (c) 1998 - 2004
21    Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22    MA  02111-1307, USA.
26  Translation from C++ and adaptation for use in ALSA-Driver
41 /**** Echo24: Gina24, Layla24, Mona, Mia, Mia-midi ****/
81  * These are the offsets for the memory-mapped DSP registers; the DSP base
108  * DSP commands sent via slave mode; these are sent to the DSP by write_dsp()
133 #define MIDI_IN_SKIP_DATA	(-1)
136 /*----------------------------------------------------------------------------
145 the future), Layla24 also has "continuous sample rate mode".  In this mode,
147 50 to 100 kHz inclusive for double speed mode.
149 To use continuous mode:
151 -Set the clock select bits in the control register to 0xe (see the #define
154 -Set double-speed mode if you want to use sample rates above 50 kHz
156 -Write the control register as you would normally
158 -Now, you need to set the frequency register. First, you need to determine the
161 frequency_reg = (LAYLA24_MAGIC_NUMBER / sample_rate) - 2
165 -Wait for the DSP handshake
166 -Write the frequency_reg value to the .SampleRate field of the comm page
167 -Send the vector command SET_LAYLA24_FREQUENCY_REG (see vmonkey.h)
169 Once you have set the control register up for continuous mode, you can just
172 continuous mode.  The driver then just keeps writing the
175 -----------------------------------------------------------------------------*/
252 #define DSP_FLAG_SPDIF_NONAUDIO		0x0002	/* Sets the "non-audio" bit
369  * via input and output pipes.  LE means little-endian,
370  * BE means big-endian.
374  *    8-bit mono unsigned samples.  For playback,
377  *    means mono->stereo.
381  *    16-bit signed little-endian mono samples.  Playback works
386  *    24-bit signed little-endian mono samples.  Data is packed
392  *    24-bit signed little-endian mono samples in a 32-bit
393  *    container.  In other words, each sample is a 32-bit signed
394  *    integer, where the actual audio data is left-justified
403  *    data.  "SS" means stereo->stereo.
409  *    This mode is used by the ASIO driver.  Here, "MM" means
410  *    mono->mono.
415  *    in big-endian format.
427 #define DSP_AUDIOFORM_MM_32LE	8	/* 32 bit mono->mono little-endian */
428 #define DSP_AUDIOFORM_MM_32BE	9	/* 32 bit mono->mono big-endian */
435  * Super-interleave is defined as interleaving by 4 or more.  Darla20 and Gina20
436  * do not support super interleave.
439  * interleave.  The interleave factor must be even.  16 - way interleave is the
440  * current maximum, so you can interleave by 4, 6, 8, 10, 12, 14, and 16.
442  * The actual format code is derived by taking the define below and or-ing with
443  * the interleave factor.  So, 32 bit interleave by 6 is 0x86 and
444  * 16 bit interleave by 16 is (0x40 | 0x10) = 0x50.
469 #define GML_ADAT_MODE		0x1000	/* 1 == ADAT mode, 0 == S/PDIF mode */
470 #define GML_SPDIF_OPTICAL_MODE	0x2000	/* 1 == optical mode, 0 == RCA mode */
471 #define GML_SPDIF_CDROM_MODE	0x3000	/* 1 == CDROM mode,
472 					 * 0 == RCA or optical mode */
570 #define E3G_FREQ_REG_DEFAULT		(E3G_MAGIC_NUMBER / 48000 - 2)
591  * this is the magic number for the hardware that gives you 0 dB at -10.
624 /* sg_entry is a single entry for the scatter-gather list.  The array of struct
625 sg_entry struct is read by the DSP, so all values must be little-endian. */
641   Any reads from or writes to this structure should be in little-endian format.
670 			/* Gina/Darla play filters - obsolete	0x3c0	168*4 */
672 			/* Gina/Darla record filters - obsolete	0x660	192*4 */
679 	__le32 nominal_level_mask;	/* -10 level enable mask	0xb64	4 */