From patchwork Thu Mar 13 09:18:36 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 3823991 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 08C58BF540 for ; Thu, 13 Mar 2014 09:30:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E4DA20270 for ; Thu, 13 Mar 2014 09:30:35 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id BEB21201FD for ; Thu, 13 Mar 2014 09:30:33 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id F37C22652EE; Thu, 13 Mar 2014 10:30:31 +0100 (CET) Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id E972B265176; Thu, 13 Mar 2014 10:21:38 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 9F2D52651F0; Thu, 13 Mar 2014 10:21:37 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from devils.ext.ti.com (devils.ext.ti.com [198.47.26.153]) by alsa0.perex.cz (Postfix) with ESMTP id 31BAC265175 for ; Thu, 13 Mar 2014 10:19:40 +0100 (CET) Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id s2D9Jdel005049; Thu, 13 Mar 2014 04:19:39 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2D9JdKq031776; Thu, 13 Mar 2014 04:19:39 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Thu, 13 Mar 2014 04:19:38 -0500 Received: from dflp32.itg.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s2D9Ifhj005531; Thu, 13 Mar 2014 04:19:35 -0500 From: Peter Ujfalusi To: , , , , Date: Thu, 13 Mar 2014 11:18:36 +0200 Message-ID: <1394702320-21743-15-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> References: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Cc: davinci-linux-open-source@linux.davincidsp.com, joelf@ti.com, nsekhar@ti.com, Liam Girdwood , Jyri Sarha , Tony Lindgren , Mark Brown , mporter@linaro.org, dan.j.williams@intel.com, vinod.koul@intel.com Subject: [alsa-devel] [PATCH 14/18] ASoC: davinci: Add edma dmaengine platform driver X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Platform driver glue for SoC using eDMA3 to use dmaengine PCM. The maximum number of periods need to be limited to 19 since the edma dmaengine driver limits the paRAM slot use for audio at in cyclic mode. Signed-off-by: Peter Ujfalusi --- sound/soc/davinci/Kconfig | 1 + sound/soc/davinci/Makefile | 2 +- sound/soc/davinci/edma-pcm.c | 77 ++++++++++++++++++++++++++++++++++++++++++++ sound/soc/davinci/edma-pcm.h | 26 +++++++++++++++ 4 files changed, 105 insertions(+), 1 deletion(-) create mode 100644 sound/soc/davinci/edma-pcm.c create mode 100644 sound/soc/davinci/edma-pcm.h diff --git a/sound/soc/davinci/Kconfig b/sound/soc/davinci/Kconfig index a8ec1fc3e4d0..f9d9f748e743 100644 --- a/sound/soc/davinci/Kconfig +++ b/sound/soc/davinci/Kconfig @@ -1,6 +1,7 @@ config SND_DAVINCI_SOC tristate "SoC Audio for TI DAVINCI or AM33XX/AM43XX chips" depends on ARCH_DAVINCI || SOC_AM33XX || SOC_AM43XX + select SND_SOC_GENERIC_DMAENGINE_PCM config SND_DAVINCI_SOC_I2S tristate diff --git a/sound/soc/davinci/Makefile b/sound/soc/davinci/Makefile index 744d4d9a0184..97d05a2f1723 100644 --- a/sound/soc/davinci/Makefile +++ b/sound/soc/davinci/Makefile @@ -1,5 +1,5 @@ # DAVINCI Platform Support -snd-soc-davinci-objs := davinci-pcm.o +snd-soc-davinci-objs := davinci-pcm.o edma-pcm.o snd-soc-davinci-i2s-objs := davinci-i2s.o snd-soc-davinci-mcasp-objs:= davinci-mcasp.o snd-soc-davinci-vcif-objs:= davinci-vcif.o diff --git a/sound/soc/davinci/edma-pcm.c b/sound/soc/davinci/edma-pcm.c new file mode 100644 index 000000000000..eeed927a2657 --- /dev/null +++ b/sound/soc/davinci/edma-pcm.c @@ -0,0 +1,77 @@ +/* + * edma-pcm.c - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx + * + * Copyright (C) 2014 Texas Instruments, Inc. + * + * Author: Peter Ujfalusi + * + * Based on: sound/soc/tegra/tegra_pcm.c + * + * 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 + +static const struct snd_pcm_hardware edma_pcm_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_INTERLEAVED, + .buffer_bytes_max = 128 * 1024, + .period_bytes_min = 32, + .period_bytes_max = 64 * 1024, + .periods_min = 2, + .periods_max = 19, /* Limit by edma dmaengine driver */ +}; + +static const struct snd_dmaengine_pcm_config edma_dmaengine_pcm_config = { + .pcm_hardware = &edma_pcm_hardware, + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .prealloc_buffer_size = 128 * 1024, +}; + +static const struct snd_dmaengine_pcm_config edma_compat_dmaengine_pcm_config = { + .pcm_hardware = &edma_pcm_hardware, + .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, + .compat_filter_fn = edma_filter_fn, + .prealloc_buffer_size = 128 * 1024, +}; + +int edma_pcm_platform_register(struct device *dev) +{ + if (dev->of_node) + return snd_dmaengine_pcm_register(dev, + &edma_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_NO_RESIDUE); + else + return snd_dmaengine_pcm_register(dev, + &edma_compat_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_NO_RESIDUE | + SND_DMAENGINE_PCM_FLAG_NO_DT | + SND_DMAENGINE_PCM_FLAG_COMPAT); +} +EXPORT_SYMBOL_GPL(edma_pcm_platform_register); + +void edma_pcm_platform_unregister(struct device *dev) +{ + snd_dmaengine_pcm_unregister(dev); +} +EXPORT_SYMBOL_GPL(edma_pcm_platform_unregister); + +MODULE_AUTHOR("Peter Ujfalusi "); +MODULE_DESCRIPTION("eDMA PCM ASoC platform driver"); +MODULE_LICENSE("GPL"); diff --git a/sound/soc/davinci/edma-pcm.h b/sound/soc/davinci/edma-pcm.h new file mode 100644 index 000000000000..25dc8c7ff093 --- /dev/null +++ b/sound/soc/davinci/edma-pcm.h @@ -0,0 +1,26 @@ +/* + * edma-pcm.h - eDMA PCM driver using dmaengine for AM3xxx, AM4xxx + * + * Copyright (C) 2014 Texas Instruments, Inc. + * + * Author: Peter Ujfalusi + * + * Based on: sound/soc/tegra/tegra_pcm.h + * + * 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. + */ + +#ifndef __EDMA_PCM_H__ +#define __EDMA_PCM_H__ + +int edma_pcm_platform_register(struct device *dev); +void edma_pcm_platform_unregister(struct device *dev); + +#endif /* __EDMA_PCM_H__ */