Hi everyone, i'm trying to interface the wm8782 codec with my Beaglebone Black running 3.8.13 kernel. I'm getting this error when i load the device tree file: davinci_evm sound.11: ASoC: CODEC (null) not registered What i'm doing wrong??
The correponding source file are attached.
Thanks for your help!
wm8782.c /* * sound/soc/codecs/wm8782.c * simple, strap-pin configured 24bit 2ch ADC * * Copyright: 2011 Raumfeld GmbH * Author: Johannes Stezenbach js@sig21.net * * based on ad73311.c * Copyright:Analog Device Inc. * Author:Cliff Cai cliff.cai@analog.com * * 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. */
#include <linux/init.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #include <sound/soc.h> #include <linux/of_device.h> #include <linux/of_device.h>
static const struct of_device_id wm8782_of_match[] = { { .compatible = "wlf,wm8782", }, { } }; MODULE_DEVICE_TABLE(of, wm8782_of_match);
static const struct snd_soc_dapm_widget wm8782_dapm_widgets[] = { SND_SOC_DAPM_INPUT("AINL"), SND_SOC_DAPM_INPUT("AINR"), };
static const struct snd_soc_dapm_route wm8782_dapm_routes[] = { { "Capture", NULL, "AINL" }, { "Capture", NULL, "AINR" }, };
static struct snd_soc_dai_driver wm8782_dai = { .name = "wm8782-hifi", .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, /* For configurations with FSAMPEN=0 */ .rates = SNDRV_PCM_RATE_8000_48000, .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, }, };
static struct snd_soc_codec_driver soc_codec_dev_wm8782 = { .dapm_widgets = wm8782_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(wm8782_dapm_widgets), .dapm_routes = wm8782_dapm_routes, .num_dapm_routes = ARRAY_SIZE(wm8782_dapm_routes), };
static int wm8782_probe(struct platform_device *pdev) { return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wm8782, &wm8782_dai, 1); }
static int wm8782_remove(struct platform_device *pdev) { snd_soc_unregister_codec(&pdev->dev); return 0; }
static struct platform_driver wm8782_codec_driver = { .driver = { .name = "wm8782", .owner = THIS_MODULE, }, .probe = wm8782_probe, .remove = wm8782_remove, };
module_platform_driver(wm8782_codec_driver);
MODULE_DESCRIPTION("ASoC WM8782 driver"); MODULE_AUTHOR("Johannes Stezenbach js@sig21.net"); MODULE_LICENSE("GPL");
davinci-evm.c
/* * ASoC driver for TI DAVINCI EVM platform * * Author: Vladimir Barinov, vbarinov@embeddedalley.com * Copyright: (C) 2007 MontaVista Software, Inc., source@mvista.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. */
#include <linux/module.h> #include <linux/moduleparam.h> #include <linux/timer.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/platform_data/edma.h> #include <linux/i2c.h> #include <linux/of_platform.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/soc.h>
#include <asm/dma.h> #include <asm/mach-types.h>
#include <linux/edma.h>
#include "davinci-pcm.h" #include "davinci-i2s.h" #include "davinci-mcasp.h"
#include <linux/of_gpio.h>
#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \ SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF) static int evm_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_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_codec *codec = rtd->codec; struct snd_soc_card *soc_card = codec->card; struct device_node *np = soc_card->dev->of_node; int ret = 0; unsigned sysclk;
if (np) { ret = of_property_read_u32(np, "ti,codec-clock-rate", &sysclk); if (ret < 0) return ret; } else { /* ASP1 on DM355 EVM is clocked by an external oscillator */ if (machine_is_davinci_dm355_evm() || machine_is_davinci_dm6467_evm() || machine_is_davinci_dm365_evm()) sysclk = 27000000;
/* * ASP0 in DM6446 EVM is clocked by U55, as configured by * board-dm644x-evm.c using GPIOs from U18. There are six * options; here we "know" we use a 48 KHz sample rate. */ else if (machine_is_davinci_evm()) sysclk = 12288000;
else if (machine_is_davinci_da830_evm() || machine_is_davinci_da850_evm()) sysclk = 24576000;
else return -EINVAL; }
/* set codec DAI configuration */ ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT); if (ret < 0) return ret;
/* set cpu DAI configuration */ ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT); if (ret < 0) return ret;
/* set the codec system clock */ ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT); if (ret < 0) return ret;
/* set the CPU system clock */ ret = snd_soc_dai_set_sysclk(cpu_dai, 0, sysclk, SND_SOC_CLOCK_OUT); if (ret < 0) return ret;
return 0; }
static int evm_spdif_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;
/* set cpu DAI configuration */ return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT); }
static struct snd_soc_ops evm_ops = { .hw_params = evm_hw_params, };
static struct snd_soc_ops evm_spdif_ops = { .hw_params = evm_spdif_hw_params, };
/* davinci-evm machine dapm widgets */ static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_LINE("Line Out", NULL), SND_SOC_DAPM_MIC("Mic Jack", NULL), SND_SOC_DAPM_LINE("Line In", NULL), };
/* davinci-evm machine audio_mapnections to the codec pins */ static const struct snd_soc_dapm_route audio_map[] = { /* Headphone connected to HPLOUT, HPROUT */ {"Headphone Jack", NULL, "HPLOUT"}, {"Headphone Jack", NULL, "HPROUT"},
/* Line Out connected to LLOUT, RLOUT */ {"Line Out", NULL, "LLOUT"}, {"Line Out", NULL, "RLOUT"},
/* Mic connected to (MIC3L | MIC3R) */ {"MIC3L", NULL, "Mic Bias 2V"}, {"MIC3R", NULL, "Mic Bias 2V"}, {"Mic Bias 2V", NULL, "Mic Jack"},
/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */ {"LINE1L", NULL, "Line In"}, {"LINE2L", NULL, "Line In"}, {"LINE1R", NULL, "Line In"}, {"LINE2R", NULL, "Line In"}, };
/* Logic for a tda998x as connected on a davinci-evm */ static int evm_tda998x_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; int ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, 1); if (ret < 0) return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, 1, 8); if (ret < 0) return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN); if (ret < 0) return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF); if (ret < 0) return ret;
return 0; }
/* Logic for a aic3x as connected on a davinci-evm */ static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_codec *codec = rtd->codec; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; struct snd_soc_dapm_context *dapm = &codec->dapm; struct device_node *np = codec->card->dev->of_node; int ret;
/* Add davinci-evm specific widgets */ snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets, ARRAY_SIZE(aic3x_dapm_widgets));
if (np) { ret = snd_soc_of_parse_audio_routing(codec->card, "ti,audio-routing"); if (ret) return ret; } else { /* Set up davinci-evm specific audio path audio_map */ snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); }
/* Divide McASP MCLK by 2 to provide 12MHz to codec */ ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, 2); if (ret < 0) return ret;
/* not connected */ snd_soc_dapm_disable_pin(dapm, "MONO_LOUT"); snd_soc_dapm_disable_pin(dapm, "HPLCOM"); snd_soc_dapm_disable_pin(dapm, "HPRCOM");
/* always connected */ snd_soc_dapm_enable_pin(dapm, "Headphone Jack"); snd_soc_dapm_enable_pin(dapm, "Line Out"); snd_soc_dapm_enable_pin(dapm, "Mic Jack"); snd_soc_dapm_enable_pin(dapm, "Line In");
return 0; }
/* davinci-evm digital audio interface glue - connects codec <--> CPU */ static struct snd_soc_dai_link dm6446_evm_dai = { .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name = "davinci-mcbsp", .codec_dai_name = "tlv320aic3x-hifi", .codec_name = "tlv320aic3x-codec.1-001b", .platform_name = "davinci-mcbsp", .init = evm_aic3x_init, .ops = &evm_ops, };
static struct snd_soc_dai_link dm355_evm_dai = { .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name = "davinci-mcbsp.1", .codec_dai_name = "tlv320aic3x-hifi", .codec_name = "tlv320aic3x-codec.1-001b", .platform_name = "davinci-mcbsp.1", .init = evm_aic3x_init, .ops = &evm_ops, };
static struct snd_soc_dai_link dm365_evm_dai = { #ifdef CONFIG_SND_DM365_AIC3X_CODEC .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name = "davinci-mcbsp", .codec_dai_name = "tlv320aic3x-hifi", .init = evm_aic3x_init, .codec_name = "tlv320aic3x-codec.1-0018", .ops = &evm_ops, .platform_name = "davinci-mcbsp", #elif defined(CONFIG_SND_DM365_VOICE_CODEC) .name = "Voice Codec - CQ93VC", .stream_name = "CQ93", .cpu_dai_name = "davinci-vcif", .codec_dai_name = "cq93vc-hifi", .codec_name = "cq93vc-codec", .platform_name = "davinci-vcif", #endif };
static struct snd_soc_dai_link dm6467_evm_dai[] = { { .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name= "davinci-mcasp.0", .codec_dai_name = "tlv320aic3x-hifi", .platform_name = "davinci-mcasp.0", .codec_name = "tlv320aic3x-codec.0-001a", .init = evm_aic3x_init, .ops = &evm_ops, }, { .name = "McASP", .stream_name = "spdif", .cpu_dai_name= "davinci-mcasp.1", .codec_dai_name = "dit-hifi", .codec_name = "spdif_dit", .platform_name = "davinci-mcasp.1", .ops = &evm_spdif_ops, }, };
static struct snd_soc_dai_link da830_evm_dai = { .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name = "davinci-mcasp.1", .codec_dai_name = "tlv320aic3x-hifi", .codec_name = "tlv320aic3x-codec.1-0018", .platform_name = "davinci-mcasp.1", .init = evm_aic3x_init, .ops = &evm_ops, };
static struct snd_soc_dai_link da850_evm_dai = { .name = "TLV320AIC3X", .stream_name = "AIC3X", .cpu_dai_name= "davinci-mcasp.0", .codec_dai_name = "tlv320aic3x-hifi", .codec_name = "tlv320aic3x-codec.1-0018", .platform_name = "davinci-mcasp.0", .init = evm_aic3x_init, .ops = &evm_ops, };
/* davinci dm6446 evm audio machine driver */ static struct snd_soc_card dm6446_snd_soc_card_evm = { .name = "DaVinci DM6446 EVM", .owner = THIS_MODULE, .dai_link = &dm6446_evm_dai, .num_links = 1, };
/* davinci dm355 evm audio machine driver */ static struct snd_soc_card dm355_snd_soc_card_evm = { .name = "DaVinci DM355 EVM", .owner = THIS_MODULE, .dai_link = &dm355_evm_dai, .num_links = 1, };
/* davinci dm365 evm audio machine driver */ static struct snd_soc_card dm365_snd_soc_card_evm = { .name = "DaVinci DM365 EVM", .owner = THIS_MODULE, .dai_link = &dm365_evm_dai, .num_links = 1, };
/* davinci dm6467 evm audio machine driver */ static struct snd_soc_card dm6467_snd_soc_card_evm = { .name = "DaVinci DM6467 EVM", .owner = THIS_MODULE, .dai_link = dm6467_evm_dai, .num_links = ARRAY_SIZE(dm6467_evm_dai), };
static struct snd_soc_card da830_snd_soc_card = { .name = "DA830/OMAP-L137 EVM", .owner = THIS_MODULE, .dai_link = &da830_evm_dai, .num_links = 1, };
static struct snd_soc_card da850_snd_soc_card = { .name = "DA850/OMAP-L138 EVM", .owner = THIS_MODULE, .dai_link = &da850_evm_dai, .num_links = 1, };
#if defined(CONFIG_OF)
enum { MACHINE_VERSION_1 = 0,/* DM365 with Voice Codec */ MACHINE_VERSION_2,/* DM365/DA8xx/OMAPL1x/AM33xx */ MACHINE_VERSION_3,/* AM33xx BeagleBone Black */ };
static const struct of_device_id davinci_evm_dt_ids[] = { { .compatible = "ti,dm365-voice-codec-audio", .data = (void *)MACHINE_VERSION_1, }, { .compatible = "ti,da830-evm-audio", .data = (void *)MACHINE_VERSION_2, }, { .compatible = "ti,am33xx-beaglebone-black", .data = (void *)MACHINE_VERSION_3, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, davinci_mcasp_dt_ids);
/* * This struct is just used as place holder. It will be filled with * data from dt node */ static struct snd_soc_dai_link evm_dai = { .name= "WM8782", .stream_name= "AIC3X", .codec_dai_name= "wm8782-hifi", };
/* davinci evm audio machine driver */ static struct snd_soc_card evm_soc_card = { .owner = THIS_MODULE, .dai_link = &evm_dai, .num_links = 1, };
static int davinci_evm_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; const struct of_device_id *match = of_match_device(of_match_ptr(davinci_evm_dt_ids), &pdev->dev); u32 machine_ver, clk_gpio; int ret = 0;
machine_ver = (u32)match->data; switch (machine_ver) { case MACHINE_VERSION_1: evm_dai.name= "Voice Codec - CQ93VC"; evm_dai.stream_name= "CQ93"; evm_dai.codec_dai_name= "cq93vc-hifi"; break; case MACHINE_VERSION_2: evm_dai.ops = &evm_ops; evm_dai.init = evm_aic3x_init; break; case MACHINE_VERSION_3: evm_dai.name= "NXP TDA HDMI Chip"; evm_dai.stream_name= "HDMI"; evm_dai.codec_dai_name= "nxp-hdmi-hifi"; evm_dai.init = evm_tda998x_init;
/* * Move GPIO handling out of the probe, if probe gets * deferred, the gpio will have been claimed on previous * probe and will fail on the second and susequent probes */ clk_gpio = of_get_named_gpio(np, "mcasp_clock_enable", 0); if (clk_gpio < 0) { dev_err(&pdev->dev, "failed to find mcasp_clock enable GPIO!\n"); return -EINVAL; } ret = gpio_request_one(clk_gpio, GPIOF_OUT_INIT_HIGH, "McASP Clock Enable Pin"); if (ret < 0) { dev_err(&pdev->dev, "Failed to claim McASP Clock Enable pin\n"); return -EINVAL; } gpio_set_value(clk_gpio, 1); break; }
evm_dai.codec_of_node = of_parse_phandle(np, "ti,audio-codec", 0); if (!evm_dai.codec_of_node) return -EINVAL;
evm_dai.cpu_of_node = of_parse_phandle(np, "ti,mcasp-controller", 0); if (!evm_dai.cpu_of_node) return -EINVAL;
evm_dai.platform_of_node = evm_dai.cpu_of_node;
evm_soc_card.dev = &pdev->dev; ret = snd_soc_of_parse_card_name(&evm_soc_card, "ti,model"); if (ret) return ret;
ret = snd_soc_register_card(&evm_soc_card); if (ret) dev_err(&pdev->dev, "snd_soc_register_card fuck failed (%d)\n", ret);
return ret; }
static int davinci_evm_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
return 0; }
static struct platform_driver davinci_evm_driver = { .probe= davinci_evm_probe, .remove= davinci_evm_remove, .driver= { .name= "davinci_evm", .owner= THIS_MODULE, .of_match_table = of_match_ptr(davinci_evm_dt_ids), }, }; #endif
static struct platform_device *evm_snd_device;
static int __init evm_init(void) { struct snd_soc_card *evm_snd_dev_data; int index; int ret;
#if defined(CONFIG_OF) /* * If dtb is there, the devices will be created dynamically. * Only register platfrom driver structure. */ if (of_have_populated_dt()) return platform_driver_register(&davinci_evm_driver); #endif
if (machine_is_davinci_evm()) { evm_snd_dev_data = &dm6446_snd_soc_card_evm; index = 0; } else if (machine_is_davinci_dm355_evm()) { evm_snd_dev_data = &dm355_snd_soc_card_evm; index = 1; } else if (machine_is_davinci_dm365_evm()) { evm_snd_dev_data = &dm365_snd_soc_card_evm; index = 0; } else if (machine_is_davinci_dm6467_evm()) { evm_snd_dev_data = &dm6467_snd_soc_card_evm; index = 0; } else if (machine_is_davinci_da830_evm()) { evm_snd_dev_data = &da830_snd_soc_card; index = 1; } else if (machine_is_davinci_da850_evm()) { evm_snd_dev_data = &da850_snd_soc_card; index = 0; } else return -EINVAL;
evm_snd_device = platform_device_alloc("soc-audio", index); if (!evm_snd_device) return -ENOMEM;
platform_set_drvdata(evm_snd_device, evm_snd_dev_data); ret = platform_device_add(evm_snd_device); if (ret) platform_device_put(evm_snd_device);
return ret; }
static void __exit evm_exit(void) { #if defined(CONFIG_OF) if (of_have_populated_dt()) { platform_driver_unregister(&davinci_evm_driver); return; } #endif
platform_device_unregister(evm_snd_device); }
module_init(evm_init); module_exit(evm_exit);
MODULE_AUTHOR("Vladimir Barinov"); MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver"); MODULE_LICENSE("GPL");
device tree file
/* * Copyright (C) 2014 John Rhoades * * 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. */ /dts-v1/; /plugin/; / { compatible = "ti,beaglebone-black"; part-number = "jsr-cs4271"; version = "00A0"; /* state the resources this cape uses */ exclusive-use = /* the pin header uses */ "P9.17", /* cs4271 reset */ /* i2c2 */ "P9.19", /* i2c2: scl */ "P9.20", /* i2c2: sca */ /* mcasp0 */ "P9.31", /* mcasp0: aclkx 0x190 */ "P9.29", /* mcasp0: fsx 0x194 */ /* not used "P9.30", /* mcasp0: axr0 0x198 */ "P9.28", /* mcasp0: axr2 0x19c */ "P9.42", /* mcasp0: aclkr 0x1a0 */ "P9.27", /* mcasp0: fsr 0x1a4 */ /* not used "P9.41", /* mcasp0: axr1 0x1a8 */ "P9.25", /* mcasp0: axr3 0x1ac */ /* the hardware IP uses */ "gpio1_27", "snd-soc-wm8782", // needed to get module loaded "mcasp0"; fragment@0 { target = <&am33xx_pinmux>; __overlay__ { wm8782_i2c2_reset: wm8782_i2c2_reset { pinctrl-single,pins = < 0x078 0x0f /* gpio0_5, mode7 */ >; }; wm8782_i2c2_pins: wm8782_i2c2_pins { pinctrl-single,pins = < 0x178 0x73 /* I2C2_sda */ 0x17c 0x73 /* I2C2_scl */ >; }; mcasp0_pins: mcasp0_pins { pinctrl-single,pins = < 0x190 0x20 /* P9.31 mcasp0 0->aclkx */ 0x194 0x20 /* P9.29 mcasp0 0->fsx */ 0x198 0x20 /* P9.30 mcasp0 0->axr0 */ 0x19c 0x22 /* P9.28 mcasp0 0->ahclkr, 2->axr2 */ 0x1a0 0x20 /* P9.42 mcasp0 0->aclkr, 2->axr2 */ 0x1a4 0x20 /* P9.27 mcasp0 0->fsr, 2->axr3 */ 0x1a8 0x20 /* P9.41 mcasp0 0->axr1 */ 0x1ac 0x22 /* P9.25 mcasp0 0->ahclkx, 2->axr3 */ >; }; }; }; fragment@2 { target = <&i2c2>; __overlay__ { #address-cells = <1>; #size-cells = <0>; wm8782: wm8782@10 { compatible = ",wm8782"; reg = <0x10>; status = "okay"; }; }; }; fragment@3 { target = <&mcasp0>; __overlay__ { pinctrl-names = "default"; pinctrl-0 = <&mcasp0_pins>; status = "okay"; op-mode = <0>; /* MCASP_I2S_MODE */ tdm-slots = <2>; num-serializer = <16>; serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */ 0 0 2 1 /* axr2: capture data, axr3: play data */ 0 0 0 0 0 0 0 0 0 0 0 0 >; tx-num-evt = <1>; rx-num-evt = <1>; }; }; fragment@4 { target = <&ocp>; __overlay__ { sound { compatible = "ti,da830-evm-audio"; //"ti,am33xx-beaglebone-black"; ti,model = "DA830 EVM"; // "wm8782"; ti,audio-codec = <&wm8782>; ti,mcasp-controller = <&mcasp0>; ti,codec-clock-rate = <24576000>; #mcasp_clock_enable = <&gpio2 27 0>; /* BeagleBone Black Clk enable on GPIO1_27 */ ti,audio-routing = "Headphone Jack", "HPLOUT", "Headphone Jack", "HPROUT", "LINE1L", "Line In", "LINE1R", "Line In"; }; }; }; };