--- /dev/null
+/*
+ msp3400.h - definition for msp3400 inputs and outputs
+
+ Copyright (C) 2006 Hans Verkuil (hverkuil@xs4all.nl)
+
+ This program 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; either version 2 of the License, or
+ (at your option) any later version.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef _MSP3400_H_
+#define _MSP3400_H_
+
+/* msp3400 routing
+ ===============
+
+ The msp3400 has a complicated routing scheme with many possible
+ combinations. The details are all in the datasheets but I will try
+ to give a short description here.
+
+ Inputs
+ ======
+
+ There are 1) tuner inputs, 2) I2S inputs, 3) SCART inputs. You will have
+ to select which tuner input to use and which SCART input to use. The
+ selected tuner input, the selected SCART input and all I2S inputs go to
+ the DSP (the tuner input first goes through the demodulator).
+
+ The DSP handles things like volume, bass/treble, balance, and some chips
+ have support for surround sound. It has several outputs: MAIN, AUX, I2S
+ and SCART1/2. Each output can select which DSP input to use. So the MAIN
+ output can select the tuner input while at the same time the SCART1 output
+ uses the I2S input.
+
+ Outputs
+ =======
+
+ Most DSP outputs are also the outputs of the msp3400. However, the SCART
+ outputs of the msp3400 can select which input to use: either the SCART1 or
+ SCART2 output from the DSP, or the msp3400 SCART inputs, thus completely
+ bypassing the DSP.
+
+ Summary
+ =======
+
+ So to specify a complete routing scheme for the msp3400 you will have to
+ specify in the 'input' arg of the s_routing function:
+
+ 1) which tuner input to use
+ 2) which SCART input to use
+ 3) which DSP input to use for each DSP output
+
+ And in the 'output' arg of the s_routing function you specify:
+
+ 1) which SCART input to use for each SCART output
+
+ Depending on how the msp is wired to the other components you can
+ ignore or mute certain inputs or outputs.
+
+ Also, depending on the msp version only a subset of the inputs or
+ outputs may be present. At the end of this header some tables are
+ added containing a list of what is available for each msp version.
+ */
+
+/* Inputs to the DSP unit: two independent selections have to be made:
+ 1) the tuner (SIF) input
+ 2) the SCART input
+ Bits 0-2 are used for the SCART input select, bit 3 is used for the tuner
+ input, bits 4-7 are reserved.
+ */
+
+/* SCART input to DSP selection */
+#define MSP_IN_SCART1 0 /* Pin SC1_IN */
+#define MSP_IN_SCART2 1 /* Pin SC2_IN */
+#define MSP_IN_SCART3 2 /* Pin SC3_IN */
+#define MSP_IN_SCART4 3 /* Pin SC4_IN */
+#define MSP_IN_MONO 6 /* Pin MONO_IN */
+#define MSP_IN_MUTE 7 /* Mute DSP input */
+#define MSP_SCART_TO_DSP(in) (in)
+/* Tuner input to demodulator and DSP selection */
+#define MSP_IN_TUNER1 0 /* Analog Sound IF input pin ANA_IN1 */
+#define MSP_IN_TUNER2 1 /* Analog Sound IF input pin ANA_IN2 */
+#define MSP_TUNER_TO_DSP(in) ((in) << 3)
+
+/* The msp has up to 5 DSP outputs, each output can independently select
+ a DSP input.
+
+ The DSP outputs are: loudspeaker output (aka MAIN), headphones output
+ (aka AUX), SCART1 DA output, SCART2 DA output and an I2S output.
+ There also is a quasi-peak detector output, but that is not used by
+ this driver and is set to the same input as the loudspeaker output.
+ Not all outputs are supported by all msp models. Setting the input
+ of an unsupported output will be ignored by the driver.
+
+ There are up to 16 DSP inputs to choose from, so each output is
+ assigned 4 bits.
+
+ Note: the 44x8G can mix two inputs and feed the result back to the
+ DSP. This is currently not implemented. Also not implemented is the
+ multi-channel capable I2S3 input of the 44x0G. If someone can demonstrate
+ a need for one of those features then additional support can be added. */
+#define MSP_DSP_IN_TUNER 0 /* Tuner DSP input */
+#define MSP_DSP_IN_SCART 2 /* SCART DSP input */
+#define MSP_DSP_IN_I2S1 5 /* I2S1 DSP input */
+#define MSP_DSP_IN_I2S2 6 /* I2S2 DSP input */
+#define MSP_DSP_IN_I2S3 7 /* I2S3 DSP input */
+#define MSP_DSP_IN_MAIN_AVC 11 /* MAIN AVC processed DSP input */
+#define MSP_DSP_IN_MAIN 12 /* MAIN DSP input */
+#define MSP_DSP_IN_AUX 13 /* AUX DSP input */
+#define MSP_DSP_TO_MAIN(in) ((in) << 4)
+#define MSP_DSP_TO_AUX(in) ((in) << 8)
+#define MSP_DSP_TO_SCART1(in) ((in) << 12)
+#define MSP_DSP_TO_SCART2(in) ((in) << 16)
+#define MSP_DSP_TO_I2S(in) ((in) << 20)
+
+/* Output SCART select: the SCART outputs can select which input
+ to use. */
+#define MSP_SC_IN_SCART1 0 /* SCART1 input, bypassing the DSP */
+#define MSP_SC_IN_SCART2 1 /* SCART2 input, bypassing the DSP */
+#define MSP_SC_IN_SCART3 2 /* SCART3 input, bypassing the DSP */
+#define MSP_SC_IN_SCART4 3 /* SCART4 input, bypassing the DSP */
+#define MSP_SC_IN_DSP_SCART1 4 /* DSP SCART1 input */
+#define MSP_SC_IN_DSP_SCART2 5 /* DSP SCART2 input */
+#define MSP_SC_IN_MONO 6 /* MONO input, bypassing the DSP */
+#define MSP_SC_IN_MUTE 7 /* MUTE output */
+#define MSP_SC_TO_SCART1(in) (in)
+#define MSP_SC_TO_SCART2(in) ((in) << 4)
+
+/* Shortcut macros */
+#define MSP_INPUT(sc, t, main_aux_src, sc_i2s_src) \
+ (MSP_SCART_TO_DSP(sc) | \
+ MSP_TUNER_TO_DSP(t) | \
+ MSP_DSP_TO_MAIN(main_aux_src) | \
+ MSP_DSP_TO_AUX(main_aux_src) | \
+ MSP_DSP_TO_SCART1(sc_i2s_src) | \
+ MSP_DSP_TO_SCART2(sc_i2s_src) | \
+ MSP_DSP_TO_I2S(sc_i2s_src))
+#define MSP_INPUT_DEFAULT MSP_INPUT(MSP_IN_SCART1, MSP_IN_TUNER1, \
+ MSP_DSP_IN_TUNER, MSP_DSP_IN_TUNER)
+#define MSP_OUTPUT(sc) \
+ (MSP_SC_TO_SCART1(sc) | \
+ MSP_SC_TO_SCART2(sc))
+/* This equals the RESET position of the msp3400 ACB register */
+#define MSP_OUTPUT_DEFAULT (MSP_SC_TO_SCART1(MSP_SC_IN_SCART3) | \
+ MSP_SC_TO_SCART2(MSP_SC_IN_DSP_SCART1))
+
+/* Tuner inputs vs. msp version */
+/* Chip TUNER_1 TUNER_2
+ -------------------------
+ msp34x0b y y
+ msp34x0c y y
+ msp34x0d y y
+ msp34x5d y n
+ msp34x7d y n
+ msp34x0g y y
+ msp34x1g y y
+ msp34x2g y y
+ msp34x5g y n
+ msp34x7g y n
+ msp44x0g y y
+ msp44x8g y y
+ */
+
+/* SCART inputs vs. msp version */
+/* Chip SC1 SC2 SC3 SC4
+ -------------------------
+ msp34x0b y y y n
+ msp34x0c y y y n
+ msp34x0d y y y y
+ msp34x5d y y n n
+ msp34x7d y n n n
+ msp34x0g y y y y
+ msp34x1g y y y y
+ msp34x2g y y y y
+ msp34x5g y y n n
+ msp34x7g y n n n
+ msp44x0g y y y y
+ msp44x8g y y y y
+ */
+
+/* DSP inputs vs. msp version (tuner and SCART inputs are always available) */
+/* Chip I2S1 I2S2 I2S3 MAIN_AVC MAIN AUX
+ ------------------------------------------
+ msp34x0b y n n n n n
+ msp34x0c y y n n n n
+ msp34x0d y y n n n n
+ msp34x5d y y n n n n
+ msp34x7d n n n n n n
+ msp34x0g y y n n n n
+ msp34x1g y y n n n n
+ msp34x2g y y n y y y
+ msp34x5g y y n n n n
+ msp34x7g n n n n n n
+ msp44x0g y y y y y y
+ msp44x8g y y y n n n
+ */
+
+/* DSP outputs vs. msp version */
+/* Chip MAIN AUX SCART1 SCART2 I2S
+ ------------------------------------
+ msp34x0b y y y n y
+ msp34x0c y y y n y
+ msp34x0d y y y y y
+ msp34x5d y n y n y
+ msp34x7d y n y n n
+ msp34x0g y y y y y
+ msp34x1g y y y y y
+ msp34x2g y y y y y
+ msp34x5g y n y n y
+ msp34x7g y n y n n
+ msp44x0g y y y y y
+ msp44x8g y y y y y
+ */
+
+#endif /* MSP3400_H */
+
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