347 lines
11 KiB
Plaintext
347 lines
11 KiB
Plaintext
From 6eb4890e1b83490864f18d3926182069e54a4dfb Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Sun, 12 Nov 2017 23:09:14 +0100
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Subject: [PATCH] sound: soc: ac100-codec: Initial implementation
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This driver provides AC100 codec controls.
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Note: This does not yet provide anything, it's just a skeleton
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for a future driver.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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sound/soc/sunxi/Kconfig | 11 ++
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sound/soc/sunxi/Makefile | 1 +
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sound/soc/sunxi/ac100-codec.c | 291 ++++++++++++++++++++++++++++++++++
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3 files changed, 303 insertions(+)
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create mode 100644 sound/soc/sunxi/ac100-codec.c
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diff --git a/sound/soc/sunxi/Kconfig b/sound/soc/sunxi/Kconfig
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index 22408bc2d6ec6..e276cc94a8c5e 100644
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--- a/sound/soc/sunxi/Kconfig
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+++ b/sound/soc/sunxi/Kconfig
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@@ -20,6 +20,17 @@ config SND_SUN8I_CODEC
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Say Y or M if you want to add sun8i digital audio codec support.
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+config SND_AC100_CODEC
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+ tristate "Allwinner (X-Powers) AC100 audio codec"
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+ depends on OF
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+ depends on MACH_SUN8I || COMPILE_TEST
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+ select REGMAP_MMIO
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+ help
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+ This option enables the audio codec support for Allwinner (X-Powers)
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+ AC100 chip.
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+
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+ Say Y or M if you want to add AC100 audio codec support.
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+
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config SND_SUN8I_CODEC_ANALOG
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tristate "Allwinner sun8i Codec Analog Controls Support"
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depends on MACH_SUN8I || (ARM64 && ARCH_SUNXI) || COMPILE_TEST
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diff --git a/sound/soc/sunxi/Makefile b/sound/soc/sunxi/Makefile
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index 4a9ef67386caf..83461fdbfaa2a 100644
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--- a/sound/soc/sunxi/Makefile
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+++ b/sound/soc/sunxi/Makefile
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@@ -4,3 +4,4 @@ obj-$(CONFIG_SND_SUN4I_I2S) += sun4i-i2s.o
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obj-$(CONFIG_SND_SUN4I_SPDIF) += sun4i-spdif.o
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obj-$(CONFIG_SND_SUN8I_CODEC_ANALOG) += sun8i-codec-analog.o
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obj-$(CONFIG_SND_SUN8I_CODEC) += sun8i-codec.o
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+obj-$(CONFIG_SND_AC100_CODEC) += ac100-codec.o
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diff --git a/sound/soc/sunxi/ac100-codec.c b/sound/soc/sunxi/ac100-codec.c
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new file mode 100644
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index 0000000000000..d5438815be754
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--- /dev/null
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+++ b/sound/soc/sunxi/ac100-codec.c
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@@ -0,0 +1,291 @@
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+/*
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+ * This driver supports the controls for X-Powers (Allwinner)
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+ * AC100 audio codec. This codec is co-packaged with AXP81x PMICs.
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+ *
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+ * (C) Copyright 2017 Ondrej Jirman <megous@megous.com>
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+ *
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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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+ *
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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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+ */
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+
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+#include <linux/module.h>
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+#include <linux/delay.h>
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+#include <linux/clk.h>
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+#include <linux/io.h>
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+#include <linux/pm_runtime.h>
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+#include <linux/regmap.h>
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+#include <linux/mfd/ac100.h>
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+
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+#include <sound/pcm_params.h>
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+#include <sound/soc.h>
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+#include <sound/soc-dapm.h>
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+
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+/*
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+ * Reasearch
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+ * ---------
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+ *
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+ * Features:
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+ * 2 A/D
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+ * 2 D/A
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+ * 2 I2S/PCM #1 and #2
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+ * 1 PCM mono #3 muxable with I2S #2
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+ * 3 mic inputs (mic #2 and #3 exclusively muxable at input)
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+ * 1 line in (directly or through amp)
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+ * 1 aux input
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+ * all input signals mixable directly into output (bypass AD/DA)
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+ *
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+ * outputs:
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+ * HPOUTL - headphone left
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+ * HPOUTR - headphone right
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+ * LINEOUT - line out differential
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+ * EAROUT - earpeiece differential
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+ * SPKOUT1 - SPOL left speaker differnetial
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+ * SPKOUT2 - SPOR right speaker differnetial
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+ *
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+ * Power up:
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+ * LDOIN - 1.5-3.3V external power
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+ * AVCC - analog power 3V
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+ * CPVDD - 1.8V
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+ * VDD-IO1 - power for I2S #1 and #2 1.8/3V
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+ * VDD-IO2 - power for I2S #3 1.8/3V
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+ * VCC-RTC - power for RTC 1.8/3V
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+ *
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+ * Clocks: page 28
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+ * SYSCLK must be 24576000 Hz (48kHz) or 22579200 Hz (44.1kHz)
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+ * - Source I2S1CLK/MCLK1
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+ * - If SRC# module is used SYSCLK must be generated by PLL
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+ *
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+ * A/D:
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+ * ADC_APC_CTRL B15 B11 enable/disable A/D to save power
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+ * ADC_APC_CTRL B14-12 B10-8 volume control for A/D
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+ * ADC_DIG_CTRL B15 enable/disable digital A/D to save power
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+ * ADDA_FS_I2S1 ADDA_FS_I2S2 - select sample rate
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+ *
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+ * D/A:
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+ * OMIXER_DACA_CTRL B15-14 enable/disable D/A channels
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+ * DAC_DIG_CTRL B15 enable/disable digital D/A
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+ *
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+ * Mixer:
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+ * - 2 channels DAC Output mixers
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+ * - inputs:
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+ * - LINEINL/R
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+ * - AXIL/R
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+ * - MIC1P/N,MIC2P/N
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+ * - Stereo DAC output
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+ * - 2 channels ADC Record mixers
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+ * - inputs:
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+ * - LINEINL/R
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+ * - AXIL/R
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+ * - MIC1P/N,MIC2P/N
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+ * - Stereo DAC output
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+ * - Digital mixers
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+ * - avaliable on:
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+ * - before stereo DAC - DAC_MXR_SRC
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+ * - I2S1 output - I2S1_MXR_SRC
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+ * - I2S2 output - I2S2_MXR_SRC
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+ * - Analogue inputs
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+ * - LINEINL/R - 1 ch. mono
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+ * - can be mixed into ADC record mixer or DAC output mixer
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+ * - -9dB to 12dB in 1.5dB step by LINEIN_DIFF_PREG
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+ * - AXIL/R - 2 ch. stereo
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+ * - can be mixed into ADC record mixer or DAC output mixer
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+ * - programmable volume level adj. and mute
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+ * - -9dB to 12dB in 1.5dB steps by AXI_PREG
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+ * - MIC1P/N - has preamp
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+ * - MIC2P/N - has preamp
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+ * - MIC3P/N - has preamp muxed with MIC2 (sel by ADC_SRCBST_CTRL B7)
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+ * - can be mixed into ADC record mixer or DAC output mixer
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+ * - preamps enable at ADC_SRCBST_CTRL B15 and B11
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+ * - preamp gain at MIC1BOOST MIC2BOOST
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+ * - Analogue outputs:
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+ * - HPOUTL/R, HPOUTFB - 2ch. headphones
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+ * - sources output mixer or directly from DAC
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+ * - sel HPOUT_CTRL B15 B14
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+ * - mute HPOUT_CTRL B13 B12
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+ * - power amp
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+ * - powerdown/up HPOUT_CTRL B11
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+ * - volume HP_VOL[5:0] - 64dB range in 1dB step from 0dB to -62dB
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+ * - mute by using 0 for HP_VOL[5:0]
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+ * - DC offset cancellation (POP noise) HP_DCRM_EN
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+ * - This bit must be set 0xf before headphone PA enabled, and this bit
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+ * must be set 0x0 before headphone PA disabled.
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+ * - zero cross to prevent noise/clicsk on volume change ZCROSS_EN
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+ * - SPOLP/N, SPORP/N 2 ch. speakers (mono/stereo)
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+ * - source for SPOLP
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+ * - left output mixer or (left+right) output mixer
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+ * - source for SPORP
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+ * - right output mixer or (left+right) output mixer
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+ * - volume 43.5dB rang in 1.5dB step from -43.5dB to 0dB
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+ * - amp enable SPKOUT_CTRL B11 B7
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+ * - EAROUTP/N - 1 ch earpeice
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+ * - source left DAC, right DAC, left output mixer or right output mixer
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+ * - volume ERPOUT_CTRL[4:0] 43.5dB range in 1.5dB step from -43.5dB to 0dB
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+ * - power amp enable ERPOUT_CTRL B5
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+ * - LINEOUTP/N - 1ch line out
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+ * - source MIC1 preamp, MIC2 preamp, left output mix or right output mix
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+ * - volume 10.5dB range in 1.5dB step from -4.5dB to 6dB
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+ * - out buffer power up/down LOUT_CTRL B4
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+ *
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+ * Jack insert detection:
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+ * - HBIAS current detection
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+ * - 5bit ADC sample rate 16/32/64/128Hz
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+ * - HMIC_STATUS[12:8] - ADC value
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+ * - 2 thresholds TH1 for plug connection, TH2 for key press
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+ * - can periodically trigger interrupts during key press (HBIAS above TH2)
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+ *
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+ * Interrupts:
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+ * - FALLING_EDGE
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+ * - for:
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+ * - KEYDOWN
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+ * - KEYUP
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+ * - PLUG_IN
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+ * - PLUG_OUT
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+ * - HMIC_DATA
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+ *
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+ * High Pass Filter:
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+ * - remove DC offset, can be disabled
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+ *
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+ * AGC:
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+ * - automatic gain control before ADC input channels
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+ * - params:
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+ * - attack, decay time - 32/fs to 2^15*32/fs
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+ * - target gain - –1dB to –30dB relative to a full-scale signal
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+ * - noise threshold - –30dB to –90dB of full-scale (mute if input below this level)
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+ * - max gain 0dB to 40dB in steps of 0.5dB
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+ * - hysteresis - for noise detection in terms of signal level
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+ * - debounce time - hysteresis for noise det in terms of time
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+ * - also provides some output flags:
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+ * - noise threshold reached
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+ * - current gain
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+ * - agc saturated (gain could get higher for the given input, but limited by
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+ * params)
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+ * - adc saturated - clipping at ADC input stage
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+ *
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+ * DRC:
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+ * - dynamic range control for digital playback path
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+ * - energy filter
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+ * - compressor
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+ * - smooth filter
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+ * - can be disabled
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+ */
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+
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+#define AC100_HMIC_DATA_MASK GENMASK(12, 8)
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+#define AC100_HMIC_DATA_OFF 8
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+#define AC100_HMIC_PULLOUT_PENDING BIT(4)
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+#define AC100_HMIC_PLUGIN_PENDING BIT(3)
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+#define AC100_HMIC_KEYUP_PENDING BIT(2)
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+#define AC100_HMIC_KEYDOWN_PENDING BIT(1)
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+#define AC100_HMIC_DATA_PENDING BIT(0)
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+
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+struct ac100_codec {
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+ struct device *dev;
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+ struct regmap *regmap;
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+ int irq;
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+};
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+
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+static irqreturn_t ac100_codec_irq(int irq, void *data)
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+{
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+ struct ac100_codec *codec = data;
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+ unsigned int val = 0;
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+ int ret;
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+
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+ /* read status */
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+ ret = regmap_read(codec->regmap, AC100_HMIC_STATUS, &val);
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+ if (ret)
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+ return IRQ_HANDLED;
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+
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+ if (val & AC100_HMIC_PULLOUT_PENDING) {
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+ dev_info(codec->dev, "IRQ: Pull out");
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+ }
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+
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+ if (val & AC100_HMIC_PLUGIN_PENDING) {
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+ dev_info(codec->dev, "IRQ: Plug in");
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+ }
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+
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+ if (val & AC100_HMIC_KEYUP_PENDING) {
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+ dev_info(codec->dev, "IRQ: Key up");
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+ }
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+
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+ if (val & AC100_HMIC_KEYDOWN_PENDING) {
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+ dev_info(codec->dev, "IRQ: Key down");
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+ }
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+
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+ if (val & AC100_HMIC_DATA_PENDING) {
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+ dev_info(codec->dev, "IRQ: Data");
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+ }
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+
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+ /* clear status */
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+ ret = regmap_write(codec->regmap, AC100_HMIC_STATUS, 0);
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+ if (ret)
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+ return IRQ_HANDLED;
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+
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+ return IRQ_HANDLED;
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+}
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+
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+static int ac100_codec_probe(struct platform_device *pdev)
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+{
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+ struct ac100_dev *ac100 = dev_get_drvdata(pdev->dev.parent);
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+ struct ac100_codec *codec;
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+ int ret;
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+
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+ codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL);
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+ if (!codec)
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+ return -ENOMEM;
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+
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+ platform_set_drvdata(pdev, codec);
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+ codec->dev = &pdev->dev;
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+ codec->regmap = ac100->regmap;
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+
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+ codec->irq = platform_get_irq(pdev, 0);
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+ if (codec->irq < 0) {
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+ dev_err(&pdev->dev, "No IRQ resource\n");
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+ return codec->irq;
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+ }
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+
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+ ret = devm_request_threaded_irq(&pdev->dev, codec->irq, NULL,
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+ ac100_codec_irq,
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+ IRQF_SHARED | IRQF_ONESHOT,
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+ dev_name(&pdev->dev), codec);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Could not request IRQ\n");
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+ return ret;
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+ }
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+
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+ return ret;
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+}
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+
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+static int ac100_codec_remove(struct platform_device *pdev)
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+{
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+ struct snd_soc_card *card = platform_get_drvdata(pdev);
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+ struct ac100_codec *codec = snd_soc_card_get_drvdata(card);
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+
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+ return 0;
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+}
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+
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+static const struct of_device_id ac100_codec_of_match[] = {
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+ { .compatible = "x-powers,ac100-codec" },
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+ {}
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+};
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+MODULE_DEVICE_TABLE(of, ac100_codec_of_match);
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+
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+static struct platform_driver ac100_codec_driver = {
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+ .driver = {
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+ .name = "ac100-codec",
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+ .of_match_table = ac100_codec_of_match,
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+ },
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+ .probe = ac100_codec_probe,
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+ .remove = ac100_codec_remove,
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+};
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+module_platform_driver(ac100_codec_driver);
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+
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+MODULE_DESCRIPTION("X-Powers AC100 codec driver");
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+MODULE_AUTHOR("Ondrej Jirman <megous@megous.com>");
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+MODULE_LICENSE("GPL");
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+MODULE_ALIAS("platform:ac100-codec");
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