227 lines
8.3 KiB
C
227 lines
8.3 KiB
C
/*
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msp3400.h - definition for msp3400 inputs and outputs
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Copyright (C) 2006 Hans Verkuil (hverkuil@xs4all.nl)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _MSP3400_H_
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#define _MSP3400_H_
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/* msp3400 routing
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===============
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The msp3400 has a complicated routing scheme with many possible
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combinations. The details are all in the datasheets but I will try
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to give a short description here.
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Inputs
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======
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There are 1) tuner inputs, 2) I2S inputs, 3) SCART inputs. You will have
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to select which tuner input to use and which SCART input to use. The
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selected tuner input, the selected SCART input and all I2S inputs go to
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the DSP (the tuner input first goes through the demodulator).
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The DSP handles things like volume, bass/treble, balance, and some chips
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have support for surround sound. It has several outputs: MAIN, AUX, I2S
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and SCART1/2. Each output can select which DSP input to use. So the MAIN
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output can select the tuner input while at the same time the SCART1 output
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uses the I2S input.
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Outputs
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=======
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Most DSP outputs are also the outputs of the msp3400. However, the SCART
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outputs of the msp3400 can select which input to use: either the SCART1 or
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SCART2 output from the DSP, or the msp3400 SCART inputs, thus completely
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bypassing the DSP.
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Summary
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=======
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So to specify a complete routing scheme for the msp3400 you will have to
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specify in the 'input' field of the v4l2_routing struct:
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1) which tuner input to use
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2) which SCART input to use
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3) which DSP input to use for each DSP output
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And in the 'output' field of the v4l2_routing struct you specify:
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1) which SCART input to use for each SCART output
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Depending on how the msp is wired to the other components you can
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ignore or mute certain inputs or outputs.
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Also, depending on the msp version only a subset of the inputs or
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outputs may be present. At the end of this header some tables are
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added containing a list of what is available for each msp version.
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*/
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/* Inputs to the DSP unit: two independent selections have to be made:
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1) the tuner (SIF) input
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2) the SCART input
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Bits 0-2 are used for the SCART input select, bit 3 is used for the tuner
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input, bits 4-7 are reserved.
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*/
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/* SCART input to DSP selection */
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#define MSP_IN_SCART1 0 /* Pin SC1_IN */
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#define MSP_IN_SCART2 1 /* Pin SC2_IN */
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#define MSP_IN_SCART3 2 /* Pin SC3_IN */
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#define MSP_IN_SCART4 3 /* Pin SC4_IN */
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#define MSP_IN_MONO 6 /* Pin MONO_IN */
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#define MSP_IN_MUTE 7 /* Mute DSP input */
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#define MSP_SCART_TO_DSP(in) (in)
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/* Tuner input to demodulator and DSP selection */
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#define MSP_IN_TUNER1 0 /* Analog Sound IF input pin ANA_IN1 */
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#define MSP_IN_TUNER2 1 /* Analog Sound IF input pin ANA_IN2 */
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#define MSP_TUNER_TO_DSP(in) ((in) << 3)
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/* The msp has up to 5 DSP outputs, each output can independently select
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a DSP input.
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The DSP outputs are: loudspeaker output (aka MAIN), headphones output
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(aka AUX), SCART1 DA output, SCART2 DA output and an I2S output.
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There also is a quasi-peak detector output, but that is not used by
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this driver and is set to the same input as the loudspeaker output.
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Not all outputs are supported by all msp models. Setting the input
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of an unsupported output will be ignored by the driver.
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There are up to 16 DSP inputs to choose from, so each output is
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assigned 4 bits.
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Note: the 44x8G can mix two inputs and feed the result back to the
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DSP. This is currently not implemented. Also not implemented is the
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multi-channel capable I2S3 input of the 44x0G. If someone can demonstrate
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a need for one of those features then additional support can be added. */
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#define MSP_DSP_IN_TUNER 0 /* Tuner DSP input */
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#define MSP_DSP_IN_SCART 2 /* SCART DSP input */
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#define MSP_DSP_IN_I2S1 5 /* I2S1 DSP input */
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#define MSP_DSP_IN_I2S2 6 /* I2S2 DSP input */
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#define MSP_DSP_IN_I2S3 7 /* I2S3 DSP input */
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#define MSP_DSP_IN_MAIN_AVC 11 /* MAIN AVC processed DSP input */
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#define MSP_DSP_IN_MAIN 12 /* MAIN DSP input */
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#define MSP_DSP_IN_AUX 13 /* AUX DSP input */
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#define MSP_DSP_TO_MAIN(in) ((in) << 4)
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#define MSP_DSP_TO_AUX(in) ((in) << 8)
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#define MSP_DSP_TO_SCART1(in) ((in) << 12)
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#define MSP_DSP_TO_SCART2(in) ((in) << 16)
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#define MSP_DSP_TO_I2S(in) ((in) << 20)
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/* Output SCART select: the SCART outputs can select which input
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to use. */
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#define MSP_SC_IN_SCART1 0 /* SCART1 input, bypassing the DSP */
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#define MSP_SC_IN_SCART2 1 /* SCART2 input, bypassing the DSP */
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#define MSP_SC_IN_SCART3 2 /* SCART3 input, bypassing the DSP */
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#define MSP_SC_IN_SCART4 3 /* SCART4 input, bypassing the DSP */
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#define MSP_SC_IN_DSP_SCART1 4 /* DSP SCART1 input */
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#define MSP_SC_IN_DSP_SCART2 5 /* DSP SCART2 input */
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#define MSP_SC_IN_MONO 6 /* MONO input, bypassing the DSP */
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#define MSP_SC_IN_MUTE 7 /* MUTE output */
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#define MSP_SC_TO_SCART1(in) (in)
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#define MSP_SC_TO_SCART2(in) ((in) << 4)
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/* Shortcut macros */
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#define MSP_INPUT(sc, t, main_aux_src, sc_i2s_src) \
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(MSP_SCART_TO_DSP(sc) | \
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MSP_TUNER_TO_DSP(t) | \
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MSP_DSP_TO_MAIN(main_aux_src) | \
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MSP_DSP_TO_AUX(main_aux_src) | \
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MSP_DSP_TO_SCART1(sc_i2s_src) | \
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MSP_DSP_TO_SCART2(sc_i2s_src) | \
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MSP_DSP_TO_I2S(sc_i2s_src))
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#define MSP_INPUT_DEFAULT MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1, \
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MSP_DSP_IN_TUNER, MSP_DSP_IN_TUNER)
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#define MSP_OUTPUT(sc) \
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(MSP_SC_TO_SCART1(sc) | \
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MSP_SC_TO_SCART2(sc))
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/* This equals the RESET position of the msp3400 ACB register */
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#define MSP_OUTPUT_DEFAULT (MSP_SC_TO_SCART1(MSP_SC_IN_SCART3) | \
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MSP_SC_TO_SCART2(MSP_SC_IN_DSP_SCART1))
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/* Tuner inputs vs. msp version */
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/* Chip TUNER_1 TUNER_2
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-------------------------
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msp34x0b y y
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msp34x0c y y
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msp34x0d y y
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msp34x5d y n
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msp34x7d y n
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msp34x0g y y
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msp34x1g y y
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msp34x2g y y
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msp34x5g y n
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msp34x7g y n
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msp44x0g y y
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msp44x8g y y
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*/
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/* SCART inputs vs. msp version */
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/* Chip SC1 SC2 SC3 SC4
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-------------------------
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msp34x0b y y y n
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msp34x0c y y y n
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msp34x0d y y y y
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msp34x5d y y n n
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msp34x7d y n n n
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msp34x0g y y y y
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msp34x1g y y y y
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msp34x2g y y y y
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msp34x5g y y n n
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msp34x7g y n n n
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msp44x0g y y y y
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msp44x8g y y y y
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*/
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/* DSP inputs vs. msp version (tuner and SCART inputs are always available) */
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/* Chip I2S1 I2S2 I2S3 MAIN_AVC MAIN AUX
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------------------------------------------
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msp34x0b y n n n n n
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msp34x0c y y n n n n
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msp34x0d y y n n n n
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msp34x5d y y n n n n
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msp34x7d n n n n n n
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msp34x0g y y n n n n
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msp34x1g y y n n n n
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msp34x2g y y n y y y
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msp34x5g y y n n n n
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msp34x7g n n n n n n
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msp44x0g y y y y y y
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msp44x8g y y y n n n
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*/
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/* DSP outputs vs. msp version */
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/* Chip MAIN AUX SCART1 SCART2 I2S
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------------------------------------
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msp34x0b y y y n y
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msp34x0c y y y n y
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msp34x0d y y y y y
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msp34x5d y n y n y
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msp34x7d y n y n n
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msp34x0g y y y y y
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msp34x1g y y y y y
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msp34x2g y y y y y
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msp34x5g y n y n y
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msp34x7g y n y n n
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msp44x0g y y y y y
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msp44x8g y y y y y
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*/
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#endif /* MSP3400_H */
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