brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 430 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0073-New-driver-for-RRA-DigiDAC1-soundcard-using-WM8741-W.patch b/target/linux/brcm2708/patches-4.19/950-0073-New-driver-for-RRA-DigiDAC1-soundcard-using-WM8741-W.patch
new file mode 100644
index 0000000000..0a43d5e1ec
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0073-New-driver-for-RRA-DigiDAC1-soundcard-using-WM8741-W.patch
@@ -0,0 +1,430 @@
+From 3f5b5702b2245c639439607ab4e64d654edaa864 Mon Sep 17 00:00:00 2001
+From: escalator2015 <jmtasende@gmail.com>
+Date: Tue, 24 May 2016 16:20:09 +0100
+Subject: [PATCH 073/703] New driver for RRA DigiDAC1 soundcard using WM8741 +
+ WM8804
+
+---
+ sound/soc/bcm/digidac1-soundcard.c | 416 +++++++++++++++++++++++++++++
+ 1 file changed, 416 insertions(+)
+ create mode 100644 sound/soc/bcm/digidac1-soundcard.c
+
+--- /dev/null
++++ b/sound/soc/bcm/digidac1-soundcard.c
+@@ -0,0 +1,416 @@
++/*
++ * ASoC Driver for RRA DigiDAC1
++ * Copyright 2016
++ * Author: José M. Tasende <vintage@redrocksaudio.es>
++ * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
++ * and the Wolfson card driver by Nikesh Oswal, <Nikesh.Oswal@wolfsonmicro.com>
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * version 2 as published by the Free Software Foundation.
++ *
++ * 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.
++ */
++
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/i2c.h>
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++#include <sound/jack.h>
++#include <sound/soc-dapm.h>
++#include <sound/tlv.h>
++#include <linux/regulator/consumer.h>
++
++#include "../codecs/wm8804.h"
++#include "../codecs/wm8741.h"
++
++#define WM8741_NUM_SUPPLIES 2
++
++/* codec private data */
++struct wm8741_priv {
++	struct wm8741_platform_data pdata;
++	struct regmap *regmap;
++	struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
++	unsigned int sysclk;
++	const struct snd_pcm_hw_constraint_list *sysclk_constraints;
++};
++
++static int samplerate = 44100;
++
++/* New Alsa Controls not exposed by original wm8741 codec driver	*/
++/* in actual driver the att. adjustment is wrong because		*/
++/* this DAC has a coarse attenuation register with 4dB steps		*/
++/* and a fine level register with 0.125dB steps				*/
++/* each register has 32 steps so combining both we have	1024 steps	*/
++/* of 0.125 dB.								*/
++/* The original level controls from driver are removed at startup	*/
++/* and replaced by the corrected ones.					*/
++/* The same wm8741 driver can be used for wm8741 and wm8742 devices	*/
++
++static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, 0, 13, 0);
++static const DECLARE_TLV_DB_SCALE(dac_tlv_coarse, -12700, 400, 1);
++static const char *w8741_dither[4] = {"Off", "RPDF", "TPDF", "HPDF"};
++static const char *w8741_filter[5] = {
++		"Type 1", "Type 2", "Type 3", "Type 4", "Type 5"};
++static const char *w8741_switch[2] = {"Off", "On"};
++static const struct soc_enum w8741_enum[] = {
++SOC_ENUM_SINGLE(WM8741_MODE_CONTROL_2, 0, 4, w8741_dither),/* dithering type */
++SOC_ENUM_SINGLE(WM8741_FILTER_CONTROL, 0, 5, w8741_filter),/* filter type */
++SOC_ENUM_SINGLE(WM8741_FORMAT_CONTROL, 6, 2, w8741_switch),/* phase invert */
++SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 0, 2, w8741_switch),/* volume ramp */
++SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 3, 2, w8741_switch),/* soft mute */
++};
++
++static const struct snd_kcontrol_new w8741_snd_controls_stereo[] = {
++SOC_DOUBLE_R_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
++		WM8741_DACRLSB_ATTENUATION, 0, 31, 1, dac_tlv_fine),
++SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
++		WM8741_DACRMSB_ATTENUATION, 0, 31, 1, dac_tlv_coarse),
++SOC_ENUM("DAC Dither", w8741_enum[0]),
++SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
++SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
++SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
++SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
++};
++
++static const struct snd_kcontrol_new w8741_snd_controls_mono_left[] = {
++SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
++		0, 31, 0, dac_tlv_fine),
++SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
++		0, 31, 1, dac_tlv_coarse),
++SOC_ENUM("DAC Dither", w8741_enum[0]),
++SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
++SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
++SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
++SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
++};
++
++static const struct snd_kcontrol_new w8741_snd_controls_mono_right[] = {
++SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
++	0, 31, 0, dac_tlv_fine),
++SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACRMSB_ATTENUATION,
++	0, 31, 1, dac_tlv_coarse),
++SOC_ENUM("DAC Dither", w8741_enum[0]),
++SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
++SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
++SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
++SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
++};
++
++static int w8741_add_controls(struct snd_soc_component *component)
++{
++	struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
++
++	switch (wm8741->pdata.diff_mode) {
++	case WM8741_DIFF_MODE_STEREO:
++	case WM8741_DIFF_MODE_STEREO_REVERSED:
++		snd_soc_add_component_controls(component,
++				w8741_snd_controls_stereo,
++				ARRAY_SIZE(w8741_snd_controls_stereo));
++		break;
++	case WM8741_DIFF_MODE_MONO_LEFT:
++		snd_soc_add_component_controls(component,
++				w8741_snd_controls_mono_left,
++				ARRAY_SIZE(w8741_snd_controls_mono_left));
++		break;
++	case WM8741_DIFF_MODE_MONO_RIGHT:
++		snd_soc_add_component_controls(component,
++				w8741_snd_controls_mono_right,
++				ARRAY_SIZE(w8741_snd_controls_mono_right));
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	return 0;
++}
++
++static int digidac1_soundcard_init(struct snd_soc_pcm_runtime *rtd)
++{
++	struct snd_soc_component *component = rtd->codec_dai->component;
++	struct snd_soc_card *card = rtd->card;
++	struct snd_soc_pcm_runtime *wm8741_rtd;
++	struct snd_soc_component *wm8741_component;
++	struct snd_card *sound_card = card->snd_card;
++	struct snd_kcontrol *kctl;
++	int ret;
++
++	wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
++	if (!wm8741_rtd) {
++		dev_warn(card->dev, "digidac1_soundcard_init: couldn't get wm8741 rtd\n");
++		return -EFAULT;
++	}
++	wm8741_component = wm8741_rtd->codec_dai->component;
++	ret = w8741_add_controls(wm8741_component);
++	if (ret < 0)
++		dev_warn(card->dev, "Failed to add new wm8741 controls: %d\n",
++		ret);
++
++	/* enable TX output */
++	snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
++
++	kctl = snd_soc_card_get_kcontrol(card,
++		"Playback Volume");
++	if (kctl) {
++		kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
++		snd_ctl_remove(sound_card, kctl);
++		}
++	kctl = snd_soc_card_get_kcontrol(card,
++		"Fine Playback Volume");
++	if (kctl) {
++		kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
++		snd_ctl_remove(sound_card, kctl);
++		}
++	return 0;
++}
++
++static int digidac1_soundcard_startup(struct snd_pcm_substream *substream)
++{
++	/* turn on wm8804 digital output */
++	struct snd_soc_pcm_runtime *rtd = substream->private_data;
++	struct snd_soc_component *component = rtd->codec_dai->component;
++	struct snd_soc_card *card = rtd->card;
++	struct snd_soc_pcm_runtime *wm8741_rtd;
++	struct snd_soc_component *wm8741_component;
++
++	snd_soc_component_update_bits(component, WM8804_PWRDN, 0x3c, 0x00);
++	wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
++	if (!wm8741_rtd) {
++		dev_warn(card->dev, "digidac1_soundcard_startup: couldn't get WM8741 rtd\n");
++		return -EFAULT;
++	}
++	wm8741_component = wm8741_rtd->codec_dai->component;
++
++	/* latch wm8741 level */
++	snd_soc_component_update_bits(wm8741_component, WM8741_DACLLSB_ATTENUATION,
++		WM8741_UPDATELL, WM8741_UPDATELL);
++	snd_soc_component_update_bits(wm8741_component, WM8741_DACLMSB_ATTENUATION,
++		WM8741_UPDATELM, WM8741_UPDATELM);
++	snd_soc_component_update_bits(wm8741_component, WM8741_DACRLSB_ATTENUATION,
++		WM8741_UPDATERL, WM8741_UPDATERL);
++	snd_soc_component_update_bits(wm8741_component, WM8741_DACRMSB_ATTENUATION,
++		WM8741_UPDATERM, WM8741_UPDATERM);
++
++	return 0;
++}
++
++static void digidac1_soundcard_shutdown(struct snd_pcm_substream *substream)
++{
++	/* turn off wm8804 digital output */
++	struct snd_soc_pcm_runtime *rtd = substream->private_data;
++	struct snd_soc_component *component = rtd->codec_dai->component;
++
++	snd_soc_component_update_bits(component, WM8804_PWRDN, 0x3c, 0x3c);
++}
++
++static int digidac1_soundcard_hw_params(struct snd_pcm_substream *substream,
++				       struct snd_pcm_hw_params *params)
++{
++	struct snd_soc_pcm_runtime *rtd = substream->private_data;
++	struct snd_soc_dai *codec_dai = rtd->codec_dai;
++	struct snd_soc_component *component = rtd->codec_dai->component;
++	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
++	struct snd_soc_card *card = rtd->card;
++	struct snd_soc_pcm_runtime *wm8741_rtd;
++	struct snd_soc_component *wm8741_component;
++
++	int sysclk = 27000000;
++	long mclk_freq = 0;
++	int mclk_div = 1;
++	int sampling_freq = 1;
++	int ret;
++
++	wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
++	if (!wm8741_rtd) {
++		dev_warn(card->dev, "digidac1_soundcard_hw_params: couldn't get WM8741 rtd\n");
++		return -EFAULT;
++	}
++	wm8741_component = wm8741_rtd->codec_dai->component;
++	samplerate = params_rate(params);
++
++	if (samplerate <= 96000) {
++		mclk_freq = samplerate*256;
++		mclk_div = WM8804_MCLKDIV_256FS;
++	} else {
++		mclk_freq = samplerate*128;
++		mclk_div = WM8804_MCLKDIV_128FS;
++		}
++
++	switch (samplerate) {
++	case 32000:
++		sampling_freq = 0x03;
++		break;
++	case 44100:
++		sampling_freq = 0x00;
++		break;
++	case 48000:
++		sampling_freq = 0x02;
++		break;
++	case 88200:
++		sampling_freq = 0x08;
++		break;
++	case 96000:
++		sampling_freq = 0x0a;
++		break;
++	case 176400:
++		sampling_freq = 0x0c;
++		break;
++	case 192000:
++		sampling_freq = 0x0e;
++		break;
++	default:
++		dev_err(card->dev,
++		"Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
++		samplerate);
++	}
++
++	snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
++	snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
++
++	ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
++		sysclk, SND_SOC_CLOCK_OUT);
++	if (ret < 0) {
++		dev_err(card->dev,
++		"Failed to set WM8804 SYSCLK: %d\n", ret);
++		return ret;
++	}
++	/* Enable wm8804 TX output */
++	snd_soc_component_update_bits(component, WM8804_PWRDN, 0x4, 0x0);
++
++	/* wm8804 Power on */
++	snd_soc_component_update_bits(component, WM8804_PWRDN, 0x9, 0);
++
++	/* wm8804 set sampling frequency status bits */
++	snd_soc_component_update_bits(component, WM8804_SPDTX4, 0x0f, sampling_freq);
++
++	/* Now update wm8741 registers for the correct oversampling */
++	if (samplerate <= 48000)
++		snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
++		 WM8741_OSR_MASK, 0x00);
++	else if (samplerate <= 96000)
++		snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
++		 WM8741_OSR_MASK, 0x20);
++	else
++		snd_soc_component_update_bits(wm8741_component, WM8741_MODE_CONTROL_1,
++		 WM8741_OSR_MASK, 0x40);
++
++	/* wm8741 bit size */
++	switch (params_width(params)) {
++	case 16:
++		snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
++		 WM8741_IWL_MASK, 0x00);
++		break;
++	case 20:
++		snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
++		 WM8741_IWL_MASK, 0x01);
++		break;
++	case 24:
++		snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
++		 WM8741_IWL_MASK, 0x02);
++		break;
++	case 32:
++		snd_soc_component_update_bits(wm8741_component, WM8741_FORMAT_CONTROL,
++		 WM8741_IWL_MASK, 0x03);
++		break;
++	default:
++		dev_dbg(card->dev, "wm8741_hw_params:    Unsupported bit size param = %d",
++			params_width(params));
++		return -EINVAL;
++	}
++
++	return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
++}
++/* machine stream operations */
++static struct snd_soc_ops digidac1_soundcard_ops = {
++	.hw_params	= digidac1_soundcard_hw_params,
++	.startup	= digidac1_soundcard_startup,
++	.shutdown	= digidac1_soundcard_shutdown,
++};
++
++static struct snd_soc_dai_link digidac1_soundcard_dai[] = {
++	{
++	.name		= "RRA DigiDAC1",
++	.stream_name	= "RRA DigiDAC1 HiFi",
++	.cpu_dai_name	= "bcm2708-i2s.0",
++	.codec_dai_name	= "wm8804-spdif",
++	.platform_name	= "bcm2708-i2s.0",
++	.codec_name	= "wm8804.1-003b",
++	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
++				SND_SOC_DAIFMT_CBM_CFM,
++	.ops		= &digidac1_soundcard_ops,
++	.init		= digidac1_soundcard_init,
++	},
++	{
++	.name		= "RRA DigiDAC11",
++	.stream_name	= "RRA DigiDAC11 HiFi",
++	.cpu_dai_name	= "wm8804-spdif",
++	.codec_dai_name	= "wm8741",
++	.codec_name	= "wm8741.1-001a",
++	.dai_fmt	= SND_SOC_DAIFMT_I2S
++			| SND_SOC_DAIFMT_NB_NF
++			| SND_SOC_DAIFMT_CBS_CFS,
++	},
++};
++
++/* audio machine driver */
++static struct snd_soc_card digidac1_soundcard = {
++	.name		= "digidac1-soundcard",
++	.owner		= THIS_MODULE,
++	.dai_link	= digidac1_soundcard_dai,
++	.num_links	= ARRAY_SIZE(digidac1_soundcard_dai),
++};
++
++static int digidac1_soundcard_probe(struct platform_device *pdev)
++{
++	int ret = 0;
++
++	digidac1_soundcard.dev = &pdev->dev;
++
++	if (pdev->dev.of_node) {
++		struct device_node *i2s_node;
++		struct snd_soc_dai_link *dai = &digidac1_soundcard_dai[0];
++
++		i2s_node = of_parse_phandle(pdev->dev.of_node,
++					"i2s-controller", 0);
++
++		if (i2s_node) {
++			dai->cpu_dai_name = NULL;
++			dai->cpu_of_node = i2s_node;
++			dai->platform_name = NULL;
++			dai->platform_of_node = i2s_node;
++		}
++	}
++
++	ret = devm_snd_soc_register_card(&pdev->dev, &digidac1_soundcard);
++	if (ret && ret != -EPROBE_DEFER)
++		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
++			ret);
++
++	return ret;
++}
++
++static const struct of_device_id digidac1_soundcard_of_match[] = {
++	{ .compatible = "rra,digidac1-soundcard", },
++	{},
++};
++MODULE_DEVICE_TABLE(of, digidac1_soundcard_of_match);
++
++static struct platform_driver digidac1_soundcard_driver = {
++	.driver = {
++			.name		= "digidac1-audio",
++			.owner		= THIS_MODULE,
++			.of_match_table	= digidac1_soundcard_of_match,
++	},
++	.probe		= digidac1_soundcard_probe,
++};
++
++module_platform_driver(digidac1_soundcard_driver);
++
++MODULE_AUTHOR("José M. Tasende <vintage@redrocksaudio.es>");
++MODULE_DESCRIPTION("ASoC Driver for RRA DigiDAC1");
++MODULE_LICENSE("GPL v2");