Implement a user-space driver for headphones amplifier TP16130 (V5).

Author: jofemodo

CMakeLists.txt

@@ -199,14 +199,18 @@ if (("$ENV{ZYNTHIAN_WIRING_LAYOUT}" STREQUAL "Z2_V1") OR ("$ENV{ZYNTHIAN_WIRING_
 
 elseif ("$ENV{ZYNTHIAN_WIRING_LAYOUT}" STREQUAL "V5")
 	message("++ Using wiringPi")
-	add_library(zyncore SHARED zyncore.c zyncontrol.h zyncontrol_v5.c zynpot.h zynpot.c zynrv112.h zynrv112.c zynads1115.h zynads1115.c zynmcp23017.h zynmcp23017.c zyncoder.h zyncoder.c zynmidirouter.h zynmidirouter.c zynmaster.h zynmaster.c)
+	add_library(zyncore SHARED zyncore.c zyncontrol.h zyncontrol_v5.c tpa6130.c tpa6130.c zynpot.h zynpot.c zynrv112.h zynrv112.c zynads1115.h zynads1115.c zynmcp23017.h zynmcp23017.c zyncoder.h zyncoder.c zynmidirouter.h zynmidirouter.c zynmaster.h zynmaster.c)
 	target_link_libraries(zyncore wiringPi jack lo)
+	add_executable(tpa6130_set_volume tpa6130_set_volume.c tpa6130.c)
+	target_link_libraries(tpa6130_set_volume wiringPi)
 
 elseif ("$ENV{ZYNTHIAN_WIRING_LAYOUT}" STREQUAL "V5_ZYNFACE")
 	message("++ Using wiringPi")
 	message("++ Building Zynaptik support")
-	add_library(zyncore SHARED zyncore.c zyncontrol.h zyncontrol_v5.c zynpot.h zynpot.c zynrv112.h zynrv112.c zynads1115.h zynads1115.c zynmcp23017.h zynmcp23017.c zyncoder.h zyncoder.c zynmidirouter.h zynmidirouter.c zynmaster.h zynmaster.c zynaptik.h zynaptik.c)
+	add_library(zyncore SHARED zyncore.c zyncontrol.h zyncontrol_v5.c tpa6130.c tpa6130.c zynrv112.h zynrv112.c zynads1115.h zynads1115.c zynmcp23017.h zynmcp23017.c zyncoder.h zyncoder.c zynmidirouter.h zynmidirouter.c zynmaster.h zynmaster.c zynaptik.h zynaptik.c)
 	target_link_libraries(zyncore wiringPi jack MCP4728 lo)
+	add_executable(tpa6130_set_volume tpa6130_set_volume.c tpa6130.c)
+	target_link_libraries(tpa6130_set_volume wiringPi)
 
 elseif (NOT ZYNTHIAN_FORCE_WIRINGPI_EMU AND HAVE_WIRINGPI_LIB)
 	message("++ Using wiringPi")

tpa6130.c

@@ -0,0 +1,65 @@
+/*
+ * ******************************************************************
+ * ZYNTHIAN PROJECT: Headphones Volume Control for TPA6130 amplifier
+ *
+ * Library for interfacing the TPA6130 headphones amplifier.
+ * It implements the volume control using I2C
+ *
+ * Copyright (C) 2015-2023 Fernando Moyano <[email protected]>
+ *
+ * ******************************************************************
+ * 
+ * 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 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.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE.txt file.
+ * 
+ * ******************************************************************
+ */
+
+#include <wiringPi.h>
+#include <wiringPiI2C.h>
+#include "tpa6130.h"
+
+//-------------------------------------------------------------------
+
+//#define DEBUG
+
+#define TPA6130_I2C_ADDRESS 0x60
+#define AMP_MAX_VOL 0x3F // 0-63
+
+int tpa6130_fd = 0x0;
+
+//-------------------------------------------------------------------
+
+uint8_t tpa6130_set_volume(uint8_t vol) {
+	wiringPiI2CWriteReg8(tpa6130_fd, 0x2, AMP_MAX_VOL & vol);
+	return vol;
+}
+
+uint8_t tpa6130_get_volume() {
+	return wiringPiI2CReadReg8(tpa6130_fd, 0x2) & 0x3C;
+}
+
+uint8_t tpa6130_get_volume_max() {
+	return AMP_MAX_VOL;
+}
+
+void tpa6130_init() {
+ 	tpa6130_fd = wiringPiI2CSetup(TPA6130_I2C_ADDRESS);
+ 	wiringPiI2CWriteReg8(tpa6130_fd, 0x1, 0xC0);
+	tpa6130_set_volume(20);
+}
+
+void tpa6130_end() {
+	wiringPiI2CWriteReg8(tpa6130_fd, 0x1, 0x00);
+}
+
+//-------------------------------------------------------------------

tpa6130.h

@@ -0,0 +1,40 @@
+/*
+ * ******************************************************************
+ * ZYNTHIAN PROJECT: Headphones Volume Control for TPA6130 amplifier
+ * 
+ * Library for interfacing the TPA6130 headphones amplifier.
+ * It implements the volume control using I2C
+ *
+ * Copyright (C) 2015-2023 Fernando Moyano <[email protected]>
+ *
+ * ******************************************************************
+ * 
+ * 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 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.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE.txt file.
+ * 
+ * ******************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+
+//-------------------------------------------------------------------
+
+uint8_t tpa6130_set_volume(uint8_t vol);
+uint8_t tpa6130_get_volume();
+uint8_t tpa6130_get_volume_max();
+void tpa6130_init();
+void tpa6130_end();
+
+//-------------------------------------------------------------------

tpa6130_set_volume.c

@@ -0,0 +1,45 @@
+/*
+ * ******************************************************************
+ * ZYNTHIAN PROJECT: Headphones Volume Control for TPA6130 amplifier
+ * 
+ * Basic CLI for setting volume
+ * Usage:
+ *   tpa6130_set_volume [0-15]
+ *
+ * Copyright (C) 2015-2023 Fernando Moyano <[email protected]>
+ *
+ * ******************************************************************
+ * 
+ * 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 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.
+ *
+ * For a full copy of the GNU General Public License see the LICENSE.txt file.
+ * 
+ * ******************************************************************
+ */
+
+#include <wiringPi.h>
+#include "tpa6130.h"
+
+//-------------------------------------------------------------------
+
+int main(int argc, char *argv[]) {
+	uint8_t vol = 10;
+	if (argc>=2) {
+		vol = atoi(argv[1]);
+	}
+	wiringPiSetup();
+	tpa6130_init();
+	printf("Setting TPA6130 volume to %d\n", vol);
+	tpa6130_set_volume(vol);
+	//tpa6130_end();
+}
+
+//-------------------------------------------------------------------

zyncontrol_v5.c

@@ -28,6 +28,7 @@
 
 #include "zynpot.h"
 #include "zyncoder.h"
+#include "tpa6130.h"
 
 //-----------------------------------------------------------------------------
 // Zynface V5
@@ -132,8 +133,13 @@ void end_zynpots() {
 // Zyncontrol Initialization
 //-----------------------------------------------------------------------------
 
+uint8_t set_hpvol(uint8_t vol) { return tpa6130_set_volume(vol); }
+uint8_t get_hpvol() { return tpa6130_get_volume(); }
+uint8_t get_hpvol_max() { return tpa6130_get_volume_max(); }
+
 int init_zyncontrol() {
 	wiringPiSetup();
+	tpa6130_init();
 	init_zynmcp23017s();
 	init_zynswitches();
 	init_zynpots();
@@ -151,6 +157,7 @@ int end_zyncontrol() {
 	reset_zyncoders();
 	reset_zynswitches();
 	reset_zynmcp23017s();
+	tpa6130_end();
 	return 1;
 }