From a3fe07ff128e521051aee8bc91add071724d6538 Mon Sep 17 00:00:00 2001
From: Dana Conrad <dconrad@fastmail.com>
Date: Tue, 21 Nov 2023 19:28:51 -0600
Subject: ErosQ New Revision HW volume

Add HW volume control via ES9018K2M, and reorganize
eros_qn_codec.c/.h, audiohw-erosqnative.c.

This automatically detects the presence of the new DAC and
uses its hardware volume scaling. If not present, use same
SWVOL we have been using so far.

Add debug menu readout of SWVOL/I2C result.

Break out es9018k2m stuff into its own file so that
maybe it can be useful to other ports.

Note that we may need to get smarter about detecting the DAC
type if/when another model emerges.

Change-Id: I586a1cf7f150dd6b4e221157859825952840af56
---
 firmware/export/es9018k2m.h | 64 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 firmware/export/es9018k2m.h

(limited to 'firmware/export/es9018k2m.h')

diff --git a/firmware/export/es9018k2m.h b/firmware/export/es9018k2m.h
new file mode 100644
index 0000000000..035a607030
--- /dev/null
+++ b/firmware/export/es9018k2m.h
@@ -0,0 +1,64 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ *
+ * Copyright (c) 2023 Dana Conrad
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef _ES9018K2M_H
+#define _ES9018K2M_H
+
+//======================================================================================
+// ES9018K2M support stuff
+
+#ifndef ES9018K2M_VOLUME_MIN
+# define ES9018K2M_VOLUME_MIN	-1270
+#endif
+
+#ifndef ES9018K2M_VOLUME_MAX
+# define ES9018K2M_VOLUME_MAX	0
+#endif
+
+#define ES9018K2M_REG0_SYSTEM_SETTINGS      0
+#define ES9018K2M_REG1_INPUT_CONFIG         1
+#define ES9018K2M_REG4_AUTOMUTE_TIME        4
+#define ES9018K2M_REG5_AUTOMUTE_LEVEL       5
+#define ES9018K2M_REG6_DEEMPHASIS           6
+#define ES9018K2M_REG7_GENERAL_SETTINGS     7
+#define ES9018K2M_REG8_GPIO_CONFIG          8
+#define ES9018K2M_REG10_MASTER_MODE_CTRL    10
+#define ES9018K2M_REG11_CHANNEL_MAPPING     11
+#define ES9018K2M_REG12_DPLL_SETTINGS       12
+#define ES9018K2M_REG13_THD_COMP            13
+#define ES9018K2M_REG14_SOFTSTART_SETTINGS  14
+#define ES9018K2M_REG15_VOLUME_L            15
+#define ES9018K2M_REG16_VOLUME_R            16
+#define ES9018K2M_REG21_GPIO_INPUT_SELECT   21
+
+/* writes volume levels to DAC over I2C */
+void es9018k2m_set_volume(int vol_l, int vol_r);
+
+/* writes a single register */
+/* returns I2C_STATUS_OK upon success, I2C_STATUS_* errors upon error */
+int es9018k2m_write_reg(uint8_t reg, uint8_t val);
+
+/* reads a single register */
+/* returns register value, or -1 upon error */
+int es9018k2m_read_reg(uint8_t reg);
+
+#endif
\ No newline at end of file
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