From 96aa0c6b0b179518e0c228362ea55f1c7793bb3a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Tue, 7 Feb 2017 21:07:54 +0100 Subject: brcm2708: add linux 4.9 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Patches from Raspberry Pi repo: https://github.com/raspberrypi/linux/commits/rpi-4.9.y Signed-off-by: Álvaro Fernández Rojas --- ...audIO-Sound-Card-support-for-Raspberry-Pi.patch | 325 +++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 target/linux/brcm2708/patches-4.9/0070-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch (limited to 'target/linux/brcm2708/patches-4.9/0070-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch') diff --git a/target/linux/brcm2708/patches-4.9/0070-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch b/target/linux/brcm2708/patches-4.9/0070-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch new file mode 100644 index 0000000000..483fc6e791 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0070-Add-IQaudIO-Sound-Card-support-for-Raspberry-Pi.patch @@ -0,0 +1,325 @@ +From db63efa8452156b71aedb5aa1e77182d25bc6906 Mon Sep 17 00:00:00 2001 +From: Gordon Garrity +Date: Sat, 8 Mar 2014 16:56:57 +0000 +Subject: [PATCH] Add IQaudIO Sound Card support for Raspberry Pi + +Set a limit of 0dB on Digital Volume Control + +The main volume control in the PCM512x DAC has a range up to ++24dB. This is dangerously loud and can potentially cause massive +clipping in the output stages. Therefore this sets a sensible +limit of 0dB for this control. + +Allow up to 24dB digital gain to be applied when using IQAudIO DAC+ + +24db_digital_gain DT param can be used to specify that PCM512x +codec "Digital" volume control should not be limited to 0dB gain, +and if specified will allow the full 24dB gain. + +Modify IQAudIO DAC+ ASoC driver to set card/dai config from dt + +Add the ability to set the card name, dai name and dai stream name, from +dt config. + +Signed-off-by: DigitalDreamtime + +IQaudIO: auto-mute for AMP+ and DigiAMP+ + +IQAudIO amplifier mute via GPIO22. Add dt params for "one-shot" unmute +and auto mute. + +Revision 2, auto mute implementing HiassofT suggestion to mute/unmute +using set_bias_level, rather than startup/shutdown.... +"By default DAPM waits 5 seconds (pmdown_time) before shutting down +playback streams so a close/stop immediately followed by open/start +doesn't trigger an amp mute+unmute." + +Tested on both AMP+ (via DAC+) and DigiAMP+, with both options... + +dtoverlay=iqaudio-dacplus,unmute_amp + "one-shot" unmute when kernel module loads. + +dtoverlay=iqaudio-dacplus,auto_mute_amp + Unmute amp when ALSA device opened by a client. Mute, with 5 second delay + when ALSA device closed. (Re-opening the device within the 5 second close + window, will cancel mute.) + +Revision 4, using gpiod. + +Revision 5, clean-up formatting before adding mute code. + - Convert tab plus 4 space formatting to 2x tab + - Remove '// NOT USED' commented code + +Revision 6, don't attempt to "one-shot" unmute amp, unless card is +successfully registered. + +Signed-off-by: DigitalDreamtime +--- + sound/soc/bcm/Kconfig | 7 ++ + sound/soc/bcm/Makefile | 2 + + sound/soc/bcm/iqaudio-dac.c | 234 ++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 243 insertions(+) + create mode 100644 sound/soc/bcm/iqaudio-dac.c + +--- a/sound/soc/bcm/Kconfig ++++ b/sound/soc/bcm/Kconfig +@@ -37,3 +37,10 @@ config SND_BCM2708_SOC_RPI_DAC + select SND_SOC_PCM1794A + help + Say Y or M if you want to add support for RPi-DAC. ++ ++config SND_BCM2708_SOC_IQAUDIO_DAC ++ tristate "Support for IQaudIO-DAC" ++ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S ++ select SND_SOC_PCM512x_I2C ++ help ++ Say Y or M if you want to add support for IQaudIO-DAC. +--- a/sound/soc/bcm/Makefile ++++ b/sound/soc/bcm/Makefile +@@ -12,7 +12,9 @@ obj-$(CONFIG_SND_SOC_CYGNUS) += snd-soc- + snd-soc-hifiberry-dac-objs := hifiberry_dac.o + snd-soc-hifiberry-digi-objs := hifiberry_digi.o + snd-soc-rpi-dac-objs := rpi-dac.o ++snd-soc-iqaudio-dac-objs := iqaudio-dac.o + + obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o + obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DIGI) += snd-soc-hifiberry-digi.o + obj-$(CONFIG_SND_BCM2708_SOC_RPI_DAC) += snd-soc-rpi-dac.o ++obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o +--- /dev/null ++++ b/sound/soc/bcm/iqaudio-dac.c +@@ -0,0 +1,234 @@ ++/* ++ * ASoC Driver for IQaudIO DAC ++ * ++ * Author: Florian Meier ++ * Copyright 2013 ++ * ++ * 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 ++#include ++#include ++ ++#include ++#include ++#include ++#include ++#include ++ ++static bool digital_gain_0db_limit = true; ++ ++static struct gpio_desc *mute_gpio; ++ ++static int snd_rpi_iqaudio_dac_init(struct snd_soc_pcm_runtime *rtd) ++{ ++ if (digital_gain_0db_limit) ++ { ++ int ret; ++ struct snd_soc_card *card = rtd->card; ++ ++ ret = snd_soc_limit_volume(card, "Digital Playback Volume", 207); ++ if (ret < 0) ++ dev_warn(card->dev, "Failed to set volume limit: %d\n", ret); ++ } ++ ++ return 0; ++} ++ ++static int snd_rpi_iqaudio_dac_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 *cpu_dai = rtd->cpu_dai; ++ ++ unsigned int sample_bits = ++ snd_pcm_format_physical_width(params_format(params)); ++ ++ return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2); ++} ++ ++static void snd_rpi_iqaudio_gpio_mute(struct snd_soc_card *card) ++{ ++ if (mute_gpio) { ++ dev_info(card->dev, "%s: muting amp using GPIO22\n", ++ __func__); ++ gpiod_set_value_cansleep(mute_gpio, 0); ++ } ++} ++ ++static void snd_rpi_iqaudio_gpio_unmute(struct snd_soc_card *card) ++{ ++ if (mute_gpio) { ++ dev_info(card->dev, "%s: un-muting amp using GPIO22\n", ++ __func__); ++ gpiod_set_value_cansleep(mute_gpio, 1); ++ } ++} ++ ++static int snd_rpi_iqaudio_set_bias_level(struct snd_soc_card *card, ++ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) ++{ ++ struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; ++ ++ if (dapm->dev != codec_dai->dev) ++ return 0; ++ ++ switch (level) { ++ case SND_SOC_BIAS_PREPARE: ++ if (dapm->bias_level != SND_SOC_BIAS_STANDBY) ++ break; ++ ++ /* UNMUTE AMP */ ++ snd_rpi_iqaudio_gpio_unmute(card); ++ ++ break; ++ case SND_SOC_BIAS_STANDBY: ++ if (dapm->bias_level != SND_SOC_BIAS_PREPARE) ++ break; ++ ++ /* MUTE AMP */ ++ snd_rpi_iqaudio_gpio_mute(card); ++ ++ break; ++ default: ++ break; ++ } ++ ++ return 0; ++} ++ ++/* machine stream operations */ ++static struct snd_soc_ops snd_rpi_iqaudio_dac_ops = { ++ .hw_params = snd_rpi_iqaudio_dac_hw_params, ++}; ++ ++static struct snd_soc_dai_link snd_rpi_iqaudio_dac_dai[] = { ++{ ++ .cpu_dai_name = "bcm2708-i2s.0", ++ .codec_dai_name = "pcm512x-hifi", ++ .platform_name = "bcm2708-i2s.0", ++ .codec_name = "pcm512x.1-004c", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++ .ops = &snd_rpi_iqaudio_dac_ops, ++ .init = snd_rpi_iqaudio_dac_init, ++}, ++}; ++ ++/* audio machine driver */ ++static struct snd_soc_card snd_rpi_iqaudio_dac = { ++ .owner = THIS_MODULE, ++ .dai_link = snd_rpi_iqaudio_dac_dai, ++ .num_links = ARRAY_SIZE(snd_rpi_iqaudio_dac_dai), ++}; ++ ++static int snd_rpi_iqaudio_dac_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ bool gpio_unmute = false; ++ ++ snd_rpi_iqaudio_dac.dev = &pdev->dev; ++ ++ if (pdev->dev.of_node) { ++ struct device_node *i2s_node; ++ struct snd_soc_card *card = &snd_rpi_iqaudio_dac; ++ struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_dac_dai[0]; ++ bool auto_gpio_mute = false; ++ ++ 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; ++ } ++ ++ digital_gain_0db_limit = !of_property_read_bool( ++ pdev->dev.of_node, "iqaudio,24db_digital_gain"); ++ ++ if (of_property_read_string(pdev->dev.of_node, "card_name", ++ &card->name)) ++ card->name = "IQaudIODAC"; ++ ++ if (of_property_read_string(pdev->dev.of_node, "dai_name", ++ &dai->name)) ++ dai->name = "IQaudIO DAC"; ++ ++ if (of_property_read_string(pdev->dev.of_node, ++ "dai_stream_name", &dai->stream_name)) ++ dai->stream_name = "IQaudIO DAC HiFi"; ++ ++ /* gpio_unmute - one time unmute amp using GPIO */ ++ gpio_unmute = of_property_read_bool(pdev->dev.of_node, ++ "iqaudio-dac,unmute-amp"); ++ ++ /* auto_gpio_mute - mute/unmute amp using GPIO */ ++ auto_gpio_mute = of_property_read_bool(pdev->dev.of_node, ++ "iqaudio-dac,auto-mute-amp"); ++ ++ if (auto_gpio_mute || gpio_unmute) { ++ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute", ++ GPIOD_OUT_LOW); ++ if (IS_ERR(mute_gpio)) { ++ ret = PTR_ERR(mute_gpio); ++ dev_err(&pdev->dev, ++ "Failed to get mute gpio: %d\n", ret); ++ return ret; ++ } ++ ++ if (auto_gpio_mute && mute_gpio) ++ snd_rpi_iqaudio_dac.set_bias_level = ++ snd_rpi_iqaudio_set_bias_level; ++ } ++ } ++ ++ ret = snd_soc_register_card(&snd_rpi_iqaudio_dac); ++ if (ret) { ++ dev_err(&pdev->dev, ++ "snd_soc_register_card() failed: %d\n", ret); ++ return ret; ++ } ++ ++ if (gpio_unmute && mute_gpio) ++ snd_rpi_iqaudio_gpio_unmute(&snd_rpi_iqaudio_dac); ++ ++ return 0; ++} ++ ++static int snd_rpi_iqaudio_dac_remove(struct platform_device *pdev) ++{ ++ snd_rpi_iqaudio_gpio_mute(&snd_rpi_iqaudio_dac); ++ ++ return snd_soc_unregister_card(&snd_rpi_iqaudio_dac); ++} ++ ++static const struct of_device_id iqaudio_of_match[] = { ++ { .compatible = "iqaudio,iqaudio-dac", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, iqaudio_of_match); ++ ++static struct platform_driver snd_rpi_iqaudio_dac_driver = { ++ .driver = { ++ .name = "snd-rpi-iqaudio-dac", ++ .owner = THIS_MODULE, ++ .of_match_table = iqaudio_of_match, ++ }, ++ .probe = snd_rpi_iqaudio_dac_probe, ++ .remove = snd_rpi_iqaudio_dac_remove, ++}; ++ ++module_platform_driver(snd_rpi_iqaudio_dac_driver); ++ ++MODULE_AUTHOR("Florian Meier "); ++MODULE_DESCRIPTION("ASoC Driver for IQAudio DAC"); ++MODULE_LICENSE("GPL v2"); -- cgit v1.2.3