Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753976Ab3GIO0I (ORCPT ); Tue, 9 Jul 2013 10:26:08 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:39083 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753912Ab3GIOZ7 (ORCPT ); Tue, 9 Jul 2013 10:25:59 -0400 From: Richard Genoud To: Mark Brown , Nicolas Ferre , Liam Girdwood , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Cc: Bo Shen , Lars-Peter Clausen , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, devicetree-discuss@lists.ozlabs.org, Richard Genoud Subject: [PATCH v4 1/7] sound: sam9x5_wm8731: machine driver for at91sam9x5 wm8731 boards Date: Tue, 9 Jul 2013 16:25:27 +0200 Message-Id: <1373379933-32749-2-git-send-email-richard.genoud@gmail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1373379933-32749-1-git-send-email-richard.genoud@gmail.com> References: <1373372929-17800-1-git-send-email-richard.genoud@gmail.com> <1373379933-32749-1-git-send-email-richard.genoud@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8709 Lines: 306 From: Nicolas Ferre Description of the Asoc machine driver for an at91sam9x5 based board with a wm8731 audio DAC. Wm8731 is clocked by a crystal and used as a master on the SSC/I2S interface. Its connections are a headphone jack and an Line input jack. [Richard: this is based on an old patch from Nicolas that I forward ported and reworked to use only device tree] Signed-off-by: Nicolas Ferre Signed-off-by: Uwe Kleine-König Signed-off-by: Richard Genoud --- sound/soc/atmel/Kconfig | 10 ++ sound/soc/atmel/Makefile | 2 + sound/soc/atmel/sam9x5_wm8731.c | 238 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 250 insertions(+) create mode 100644 sound/soc/atmel/sam9x5_wm8731.c diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig index 1c0b185..9eb8c49 100644 --- a/sound/soc/atmel/Kconfig +++ b/sound/soc/atmel/Kconfig @@ -33,6 +33,16 @@ config SND_AT91_SOC_SAM9G20_WM8731 Say Y if you want to add support for SoC audio on WM8731-based AT91sam9g20 evaluation board. +config SND_AT91_SOC_SAM9X5_WM8731 + tristate "SoC Audio support for WM8731-based at91sam9x5 board" + depends on ATMEL_SSC && SND_ATMEL_SOC && SOC_AT91SAM9X5 + select SND_ATMEL_SOC_SSC + select SND_ATMEL_SOC_DMA + select SND_SOC_WM8731 + help + Say Y if you want to add support for audio SoC on an + at91sam9x5 based board that is using WM8731 codec. + config SND_AT91_SOC_AFEB9260 tristate "SoC Audio support for AFEB9260 board" depends on ARCH_AT91 && ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 && SND_ATMEL_SOC diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile index 41967cc..7784c09 100644 --- a/sound/soc/atmel/Makefile +++ b/sound/soc/atmel/Makefile @@ -11,6 +11,8 @@ obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o # AT91 Machine Support snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o +snd-soc-sam9x5-wm8731-objs := sam9x5_wm8731.o obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o +obj-$(CONFIG_SND_AT91_SOC_SAM9X5_WM8731) += snd-soc-sam9x5-wm8731.o obj-$(CONFIG_SND_AT91_SOC_AFEB9260) += snd-soc-afeb9260.o diff --git a/sound/soc/atmel/sam9x5_wm8731.c b/sound/soc/atmel/sam9x5_wm8731.c new file mode 100644 index 0000000..c56e36b --- /dev/null +++ b/sound/soc/atmel/sam9x5_wm8731.c @@ -0,0 +1,238 @@ +/* + * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards + * that are using WM8731 as codec. + * + * Copyright (C) 2011 Atmel, + * Nicolas Ferre + * + * Copyright (C) 2013 Paratronic, + * Richard Genoud + * + * Based on sam9g20_wm8731.c by: + * Sedji Gaouaou + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include +#include + +#include +#include +#include + +#include "../codecs/wm8731.h" +#include "atmel-pcm.h" +#include "atmel_ssc_dai.h" + +#define MCLK_RATE 12288000 + +#define DRV_NAME "sam9x5-snd-wm8731" + +/* + * Authorized rates are: + * Rate = MCLK_RATE / (n * 2) + * Where n is in [1..4095] + * (cf register SSC_CMR) + */ +static unsigned int rates[] = { + 8000, + 16000, + 32000, + 48000, + 64000, + 96000, +}; + +static struct snd_pcm_hw_constraint_list hw_rates = { + .count = ARRAY_SIZE(rates), + .list = rates, +}; + +/* + * Logic for a wm8731 as connected on a at91sam9x5 based board. + */ +static int at91sam9x5ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_dai *codec_dai = rtd->codec_dai; + struct device *dev = rtd->dev; + int ret; + + dev_dbg(dev, "ASoC: %s called\n", __func__); + + /* set the codec system clock for DAC and ADC */ + ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, + MCLK_RATE, SND_SOC_CLOCK_IN); + if (ret < 0) { + dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret); + return ret; + } + + return 0; +} + +static int sam9x5ek_wm8731_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + + runtime->hw.rate_min = hw_rates.list[0]; + runtime->hw.rate_max = hw_rates.list[hw_rates.count - 1]; + runtime->hw.rates = SNDRV_PCM_RATE_KNOT; + + return snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + &hw_rates); +} + +/* + * Audio paths on at91sam9x5ek board: + * + * |A| ------------> | | ---R----> Headphone Jack + * |T| <----\ | WM | ---L--/ + * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack + * |1| <------------ | | <--L--/ + */ +static const struct snd_soc_dapm_widget at91sam9x5ek_dapm_widgets[] = { + SND_SOC_DAPM_HP("Headphone Jack", NULL), + SND_SOC_DAPM_LINE("Line In Jack", NULL), +}; + +static struct snd_soc_ops sam9x5ek_wm8731_ops = { + .startup = sam9x5ek_wm8731_startup, +}; + +static struct snd_soc_dai_link at91sam9x5ek_dai = { + .name = "WM8731", + .stream_name = "WM8731 PCM", + .codec_dai_name = "wm8731-hifi", + .init = at91sam9x5ek_wm8731_init, + .ops = &sam9x5ek_wm8731_ops, +}; + +static struct snd_soc_card snd_soc_at91sam9x5ek = { + .owner = THIS_MODULE, + .dai_link = &at91sam9x5ek_dai, + .num_links = 1, + .dapm_widgets = at91sam9x5ek_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(at91sam9x5ek_dapm_widgets), +}; + +static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device_node *codec_np, *cpu_np; + int ret; + + if (!np) { + dev_err(&pdev->dev, "No device node supplied\n"); + return -EINVAL; + } + + ret = atmel_ssc_set_audio(0); + if (ret != 0) { + dev_err(&pdev->dev, + "ASoC: Failed to set SSC 0 for audio: %d\n", ret); + return ret; + } + + snd_soc_at91sam9x5ek.dev = &pdev->dev; + + ret = snd_soc_of_parse_card_name(&snd_soc_at91sam9x5ek, "atmel,model"); + if (ret) + goto out; + + ret = snd_soc_of_parse_audio_routing(&snd_soc_at91sam9x5ek, + "atmel,audio-routing"); + if (ret) + goto out; + + codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); + if (!codec_np) { + dev_err(&pdev->dev, "codec info missing\n"); + ret = -EINVAL; + goto out; + } + + at91sam9x5ek_dai.codec_of_node = codec_np; + + cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); + if (!cpu_np) { + dev_err(&pdev->dev, "ssc controller node missing\n"); + ret = -EINVAL; + goto out; + } + at91sam9x5ek_dai.cpu_of_node = cpu_np; + at91sam9x5ek_dai.platform_of_node = cpu_np; + + of_node_put(codec_np); + of_node_put(cpu_np); + + at91sam9x5ek_dai.dai_fmt = snd_soc_of_parse_daifmt(np, "atmel,"); + + ret = snd_soc_register_card(&snd_soc_at91sam9x5ek); + if (ret) { + dev_err(&pdev->dev, + "ASoC: Platform device allocation failed\n"); + goto out; + } + + platform_set_drvdata(pdev, &snd_soc_at91sam9x5ek); + + dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__); + + return ret; + +out: + atmel_ssc_put_audio(0); + return ret; +} + +static int sam9x5_wm8731_driver_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + atmel_ssc_put_audio(0); + + return 0; +} + +static const struct of_device_id sam9x5_wm8731_of_match[] = { + { .compatible = "atmel,sam9x5-wm8731-audio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); + +static struct platform_driver sam9x5_wm8731_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), + }, + .probe = sam9x5_wm8731_driver_probe, + .remove = sam9x5_wm8731_driver_remove, +}; +module_platform_driver(sam9x5_wm8731_driver); + +/* Module information */ +MODULE_AUTHOR("Nicolas Ferre "); +MODULE_AUTHOR("Richard Genoud "); +MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRV_NAME); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/