linux/include/media/msp3400.h
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   1/*
   2    msp3400.h - definition for msp3400 inputs and outputs
   3
   4    Copyright (C) 2006 Hans Verkuil (hverkuil@xs4all.nl)
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19*/
  20
  21#ifndef _MSP3400_H_
  22#define _MSP3400_H_
  23
  24/* msp3400 routing
  25   ===============
  26
  27   The msp3400 has a complicated routing scheme with many possible
  28   combinations. The details are all in the datasheets but I will try
  29   to give a short description here.
  30
  31   Inputs
  32   ======
  33
  34   There are 1) tuner inputs, 2) I2S inputs, 3) SCART inputs. You will have
  35   to select which tuner input to use and which SCART input to use. The
  36   selected tuner input, the selected SCART input and all I2S inputs go to
  37   the DSP (the tuner input first goes through the demodulator).
  38
  39   The DSP handles things like volume, bass/treble, balance, and some chips
  40   have support for surround sound. It has several outputs: MAIN, AUX, I2S
  41   and SCART1/2. Each output can select which DSP input to use. So the MAIN
  42   output can select the tuner input while at the same time the SCART1 output
  43   uses the I2S input.
  44
  45   Outputs
  46   =======
  47
  48   Most DSP outputs are also the outputs of the msp3400. However, the SCART
  49   outputs of the msp3400 can select which input to use: either the SCART1 or
  50   SCART2 output from the DSP, or the msp3400 SCART inputs, thus completely
  51   bypassing the DSP.
  52
  53   Summary
  54   =======
  55
  56   So to specify a complete routing scheme for the msp3400 you will have to
  57   specify in the 'input' arg of the s_routing function:
  58
  59   1) which tuner input to use
  60   2) which SCART input to use
  61   3) which DSP input to use for each DSP output
  62
  63   And in the 'output' arg of the s_routing function you specify:
  64
  65   1) which SCART input to use for each SCART output
  66
  67   Depending on how the msp is wired to the other components you can
  68   ignore or mute certain inputs or outputs.
  69
  70   Also, depending on the msp version only a subset of the inputs or
  71   outputs may be present. At the end of this header some tables are
  72   added containing a list of what is available for each msp version.
  73 */
  74
  75/* Inputs to the DSP unit: two independent selections have to be made:
  76   1) the tuner (SIF) input
  77   2) the SCART input
  78   Bits 0-2 are used for the SCART input select, bit 3 is used for the tuner
  79   input, bits 4-7 are reserved.
  80 */
  81
  82/* SCART input to DSP selection */
  83#define MSP_IN_SCART1           0  /* Pin SC1_IN */
  84#define MSP_IN_SCART2           1  /* Pin SC2_IN */
  85#define MSP_IN_SCART3           2  /* Pin SC3_IN */
  86#define MSP_IN_SCART4           3  /* Pin SC4_IN */
  87#define MSP_IN_MONO             6  /* Pin MONO_IN */
  88#define MSP_IN_MUTE             7  /* Mute DSP input */
  89#define MSP_SCART_TO_DSP(in)    (in)
  90/* Tuner input to demodulator and DSP selection */
  91#define MSP_IN_TUNER1           0  /* Analog Sound IF input pin ANA_IN1 */
  92#define MSP_IN_TUNER2           1  /* Analog Sound IF input pin ANA_IN2 */
  93#define MSP_TUNER_TO_DSP(in)    ((in) << 3)
  94
  95/* The msp has up to 5 DSP outputs, each output can independently select
  96   a DSP input.
  97
  98   The DSP outputs are: loudspeaker output (aka MAIN), headphones output
  99   (aka AUX), SCART1 DA output, SCART2 DA output and an I2S output.
 100   There also is a quasi-peak detector output, but that is not used by
 101   this driver and is set to the same input as the loudspeaker output.
 102   Not all outputs are supported by all msp models. Setting the input
 103   of an unsupported output will be ignored by the driver.
 104
 105   There are up to 16 DSP inputs to choose from, so each output is
 106   assigned 4 bits.
 107
 108   Note: the 44x8G can mix two inputs and feed the result back to the
 109   DSP. This is currently not implemented. Also not implemented is the
 110   multi-channel capable I2S3 input of the 44x0G. If someone can demonstrate
 111   a need for one of those features then additional support can be added. */
 112#define MSP_DSP_IN_TUNER        0  /* Tuner DSP input */
 113#define MSP_DSP_IN_SCART        2  /* SCART DSP input */
 114#define MSP_DSP_IN_I2S1         5  /* I2S1 DSP input */
 115#define MSP_DSP_IN_I2S2         6  /* I2S2 DSP input */
 116#define MSP_DSP_IN_I2S3         7  /* I2S3 DSP input */
 117#define MSP_DSP_IN_MAIN_AVC     11 /* MAIN AVC processed DSP input */
 118#define MSP_DSP_IN_MAIN         12 /* MAIN DSP input */
 119#define MSP_DSP_IN_AUX          13 /* AUX DSP input */
 120#define MSP_DSP_TO_MAIN(in)     ((in) << 4)
 121#define MSP_DSP_TO_AUX(in)      ((in) << 8)
 122#define MSP_DSP_TO_SCART1(in)   ((in) << 12)
 123#define MSP_DSP_TO_SCART2(in)   ((in) << 16)
 124#define MSP_DSP_TO_I2S(in)      ((in) << 20)
 125
 126/* Output SCART select: the SCART outputs can select which input
 127   to use. */
 128#define MSP_SC_IN_SCART1        0  /* SCART1 input, bypassing the DSP */
 129#define MSP_SC_IN_SCART2        1  /* SCART2 input, bypassing the DSP */
 130#define MSP_SC_IN_SCART3        2  /* SCART3 input, bypassing the DSP */
 131#define MSP_SC_IN_SCART4        3  /* SCART4 input, bypassing the DSP */
 132#define MSP_SC_IN_DSP_SCART1    4  /* DSP SCART1 input */
 133#define MSP_SC_IN_DSP_SCART2    5  /* DSP SCART2 input */
 134#define MSP_SC_IN_MONO          6  /* MONO input, bypassing the DSP */
 135#define MSP_SC_IN_MUTE          7  /* MUTE output */
 136#define MSP_SC_TO_SCART1(in)    (in)
 137#define MSP_SC_TO_SCART2(in)    ((in) << 4)
 138
 139/* Shortcut macros */
 140#define MSP_INPUT(sc, t, main_aux_src, sc_i2s_src) \
 141        (MSP_SCART_TO_DSP(sc) | \
 142         MSP_TUNER_TO_DSP(t) | \
 143         MSP_DSP_TO_MAIN(main_aux_src) | \
 144         MSP_DSP_TO_AUX(main_aux_src) | \
 145         MSP_DSP_TO_SCART1(sc_i2s_src) | \
 146         MSP_DSP_TO_SCART2(sc_i2s_src) | \
 147         MSP_DSP_TO_I2S(sc_i2s_src))
 148#define MSP_INPUT_DEFAULT MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1, \
 149                                    MSP_DSP_IN_TUNER, MSP_DSP_IN_TUNER)
 150#define MSP_OUTPUT(sc) \
 151        (MSP_SC_TO_SCART1(sc) | \
 152         MSP_SC_TO_SCART2(sc))
 153/* This equals the RESET position of the msp3400 ACB register */
 154#define MSP_OUTPUT_DEFAULT (MSP_SC_TO_SCART1(MSP_SC_IN_SCART3) | \
 155                            MSP_SC_TO_SCART2(MSP_SC_IN_DSP_SCART1))
 156
 157/* Tuner inputs vs. msp version */
 158/* Chip      TUNER_1   TUNER_2
 159   -------------------------
 160   msp34x0b  y         y
 161   msp34x0c  y         y
 162   msp34x0d  y         y
 163   msp34x5d  y         n
 164   msp34x7d  y         n
 165   msp34x0g  y         y
 166   msp34x1g  y         y
 167   msp34x2g  y         y
 168   msp34x5g  y         n
 169   msp34x7g  y         n
 170   msp44x0g  y         y
 171   msp44x8g  y         y
 172 */
 173
 174/* SCART inputs vs. msp version */
 175/* Chip      SC1 SC2 SC3 SC4
 176   -------------------------
 177   msp34x0b  y   y   y   n
 178   msp34x0c  y   y   y   n
 179   msp34x0d  y   y   y   y
 180   msp34x5d  y   y   n   n
 181   msp34x7d  y   n   n   n
 182   msp34x0g  y   y   y   y
 183   msp34x1g  y   y   y   y
 184   msp34x2g  y   y   y   y
 185   msp34x5g  y   y   n   n
 186   msp34x7g  y   n   n   n
 187   msp44x0g  y   y   y   y
 188   msp44x8g  y   y   y   y
 189 */
 190
 191/* DSP inputs vs. msp version (tuner and SCART inputs are always available) */
 192/* Chip      I2S1 I2S2 I2S3 MAIN_AVC MAIN AUX
 193   ------------------------------------------
 194   msp34x0b  y    n    n    n        n    n
 195   msp34x0c  y    y    n    n        n    n
 196   msp34x0d  y    y    n    n        n    n
 197   msp34x5d  y    y    n    n        n    n
 198   msp34x7d  n    n    n    n        n    n
 199   msp34x0g  y    y    n    n        n    n
 200   msp34x1g  y    y    n    n        n    n
 201   msp34x2g  y    y    n    y        y    y
 202   msp34x5g  y    y    n    n        n    n
 203   msp34x7g  n    n    n    n        n    n
 204   msp44x0g  y    y    y    y        y    y
 205   msp44x8g  y    y    y    n        n    n
 206 */
 207
 208/* DSP outputs vs. msp version */
 209/* Chip      MAIN AUX SCART1 SCART2 I2S
 210   ------------------------------------
 211   msp34x0b  y    y   y      n      y
 212   msp34x0c  y    y   y      n      y
 213   msp34x0d  y    y   y      y      y
 214   msp34x5d  y    n   y      n      y
 215   msp34x7d  y    n   y      n      n
 216   msp34x0g  y    y   y      y      y
 217   msp34x1g  y    y   y      y      y
 218   msp34x2g  y    y   y      y      y
 219   msp34x5g  y    n   y      n      y
 220   msp34x7g  y    n   y      n      n
 221   msp44x0g  y    y   y      y      y
 222   msp44x8g  y    y   y      y      y
 223 */
 224
 225#endif /* MSP3400_H */
 226
 227
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