diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0076-Add-driver-for-rpi-proto.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/0076-Add-driver-for-rpi-proto.patch | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0076-Add-driver-for-rpi-proto.patch b/target/linux/brcm2708/patches-4.9/0076-Add-driver-for-rpi-proto.patch new file mode 100644 index 0000000000..b23ff22d34 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0076-Add-driver-for-rpi-proto.patch @@ -0,0 +1,210 @@ +From 001f8b8dc231bf3e20fd6802e2664788891ed8c4 Mon Sep 17 00:00:00 2001 +From: Waldemar Brodkorb <wbrodkorb@conet.de> +Date: Wed, 25 Mar 2015 09:26:17 +0100 +Subject: [PATCH] Add driver for rpi-proto + +Forward port of 3.10.x driver from https://github.com/koalo +We are using a custom board and would like to use rpi 3.18.x +kernel. Patch works fine for our embedded system. + +URL to the audio chip: +http://www.mikroe.com/add-on-boards/audio-voice/audio-codec-proto/ + +Playback tested with devicetree enabled. + +Signed-off-by: Waldemar Brodkorb <wbrodkorb@conet.de> +--- + sound/soc/bcm/Kconfig | 7 +++ + sound/soc/bcm/Makefile | 2 + + sound/soc/bcm/rpi-proto.c | 154 ++++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 163 insertions(+) + create mode 100644 sound/soc/bcm/rpi-proto.c + +--- a/sound/soc/bcm/Kconfig ++++ b/sound/soc/bcm/Kconfig +@@ -45,6 +45,13 @@ config SND_BCM2708_SOC_RPI_DAC + help + Say Y or M if you want to add support for RPi-DAC. + ++config SND_BCM2708_SOC_RPI_PROTO ++ tristate "Support for Rpi-PROTO" ++ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S ++ select SND_SOC_WM8731 ++ help ++ Say Y or M if you want to add support for Audio Codec Board PROTO (WM8731). ++ + config SND_BCM2708_SOC_IQAUDIO_DAC + tristate "Support for IQaudIO-DAC" + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S +--- a/sound/soc/bcm/Makefile ++++ b/sound/soc/bcm/Makefile +@@ -13,10 +13,12 @@ snd-soc-hifiberry-dac-objs := hifiberry_ + snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o + snd-soc-hifiberry-digi-objs := hifiberry_digi.o + snd-soc-rpi-dac-objs := rpi-dac.o ++snd-soc-rpi-proto-objs := rpi-proto.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_DACPLUS) += snd-soc-hifiberry-dacplus.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-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO) += snd-soc-rpi-proto.o + obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o +--- /dev/null ++++ b/sound/soc/bcm/rpi-proto.c +@@ -0,0 +1,154 @@ ++/* ++ * ASoC driver for PROTO AudioCODEC (with a WM8731) ++ * connected to a Raspberry Pi ++ * ++ * Author: Florian Meier, <koalo@koalo.de> ++ * 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. ++ */ ++ ++#include <linux/module.h> ++#include <linux/platform_device.h> ++ ++#include <sound/core.h> ++#include <sound/pcm.h> ++#include <sound/soc.h> ++#include <sound/jack.h> ++ ++#include "../codecs/wm8731.h" ++ ++static const unsigned int wm8731_rates_12288000[] = { ++ 8000, 32000, 48000, 96000, ++}; ++ ++static struct snd_pcm_hw_constraint_list wm8731_constraints_12288000 = { ++ .list = wm8731_rates_12288000, ++ .count = ARRAY_SIZE(wm8731_rates_12288000), ++}; ++ ++static int snd_rpi_proto_startup(struct snd_pcm_substream *substream) ++{ ++ /* Setup constraints, because there is a 12.288 MHz XTAL on the board */ ++ snd_pcm_hw_constraint_list(substream->runtime, 0, ++ SNDRV_PCM_HW_PARAM_RATE, ++ &wm8731_constraints_12288000); ++ return 0; ++} ++ ++static int snd_rpi_proto_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_codec *codec = rtd->codec; ++ struct snd_soc_dai *codec_dai = rtd->codec_dai; ++ struct snd_soc_dai *cpu_dai = rtd->cpu_dai; ++ int sysclk = 12288000; /* This is fixed on this board */ ++ ++ /* Set proto bclk */ ++ int ret = snd_soc_dai_set_bclk_ratio(cpu_dai,32*2); ++ if (ret < 0){ ++ dev_err(codec->dev, ++ "Failed to set BCLK ratio %d\n", ret); ++ return ret; ++ } ++ ++ /* Set proto sysclk */ ++ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, ++ sysclk, SND_SOC_CLOCK_IN); ++ if (ret < 0) { ++ dev_err(codec->dev, ++ "Failed to set WM8731 SYSCLK: %d\n", ret); ++ return ret; ++ } ++ ++ return 0; ++} ++ ++/* machine stream operations */ ++static struct snd_soc_ops snd_rpi_proto_ops = { ++ .startup = snd_rpi_proto_startup, ++ .hw_params = snd_rpi_proto_hw_params, ++}; ++ ++static struct snd_soc_dai_link snd_rpi_proto_dai[] = { ++{ ++ .name = "WM8731", ++ .stream_name = "WM8731 HiFi", ++ .cpu_dai_name = "bcm2708-i2s.0", ++ .codec_dai_name = "wm8731-hifi", ++ .platform_name = "bcm2708-i2s.0", ++ .codec_name = "wm8731.1-001a", ++ .dai_fmt = SND_SOC_DAIFMT_I2S ++ | SND_SOC_DAIFMT_NB_NF ++ | SND_SOC_DAIFMT_CBM_CFM, ++ .ops = &snd_rpi_proto_ops, ++}, ++}; ++ ++/* audio machine driver */ ++static struct snd_soc_card snd_rpi_proto = { ++ .name = "snd_rpi_proto", ++ .owner = THIS_MODULE, ++ .dai_link = snd_rpi_proto_dai, ++ .num_links = ARRAY_SIZE(snd_rpi_proto_dai), ++}; ++ ++static int snd_rpi_proto_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ ++ snd_rpi_proto.dev = &pdev->dev; ++ ++ if (pdev->dev.of_node) { ++ struct device_node *i2s_node; ++ struct snd_soc_dai_link *dai = &snd_rpi_proto_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 = snd_soc_register_card(&snd_rpi_proto); ++ if (ret) { ++ dev_err(&pdev->dev, ++ "snd_soc_register_card() failed: %d\n", ret); ++ } ++ ++ return ret; ++} ++ ++ ++static int snd_rpi_proto_remove(struct platform_device *pdev) ++{ ++ return snd_soc_unregister_card(&snd_rpi_proto); ++} ++ ++static const struct of_device_id snd_rpi_proto_of_match[] = { ++ { .compatible = "rpi,rpi-proto", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, snd_rpi_proto_of_match); ++ ++static struct platform_driver snd_rpi_proto_driver = { ++ .driver = { ++ .name = "snd-rpi-proto", ++ .owner = THIS_MODULE, ++ .of_match_table = snd_rpi_proto_of_match, ++ }, ++ .probe = snd_rpi_proto_probe, ++ .remove = snd_rpi_proto_remove, ++}; ++ ++module_platform_driver(snd_rpi_proto_driver); ++ ++MODULE_AUTHOR("Florian Meier"); ++MODULE_DESCRIPTION("ASoC Driver for Raspberry Pi connected to PROTO board (WM8731)"); ++MODULE_LICENSE("GPL"); |