From patchwork Wed Jun 11 10:14:40 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bo Shen X-Patchwork-Id: 4335171 Return-Path: X-Original-To: patchwork-linux-arm@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 72073BEEAA for ; Wed, 11 Jun 2014 10:18:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 915A92022A for ; Wed, 11 Jun 2014 10:18:08 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E385C202F8 for ; Wed, 11 Jun 2014 10:18:06 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WufZl-0002cC-Nl; Wed, 11 Jun 2014 10:16:13 +0000 Received: from nasmtp01.atmel.com ([192.199.1.246] helo=DVREDG02.corp.atmel.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WufZN-0002Pe-8R for linux-arm-kernel@lists.infradead.org; Wed, 11 Jun 2014 10:15:50 +0000 Received: from sjogate2.atmel.com (10.42.103.223) by DVREDG02.corp.atmel.com (10.42.103.31) with Microsoft SMTP Server id 14.2.347.0; Wed, 11 Jun 2014 04:15:23 -0600 Received: from Dev4Android.corp.atmel.com ([10.217.2.46]) by sjogate2.atmel.com (8.13.6/8.13.6) with ESMTP id s5BA7KTF004629; Wed, 11 Jun 2014 03:07:50 -0700 (PDT) From: Bo Shen To: Subject: [PATCH v2 2/4] ASoC: atmel_ssc_dai: enable fslen extension feature Date: Wed, 11 Jun 2014 18:14:40 +0800 Message-ID: <1402481682-9811-3-git-send-email-voice.shen@atmel.com> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1402481682-9811-1-git-send-email-voice.shen@atmel.com> References: <1402481682-9811-1-git-send-email-voice.shen@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140611_031549_404282_F22B3A15 X-CRM114-Status: GOOD ( 13.23 ) X-Spam-Score: -0.7 (/) Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, nicolas.ferre@atmel.com, linux-sound@vger.kernel.org, Bo Shen , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When SSC work as master, it will generate the frame sync signal. On old SoCs, it only supports frame sync length less or equal to 16bits, on newer SoCs, it supports frame sync length extension, which can support frame size larger than 16 bits. So, add this to make it supports playback 24/32 bits audio clips. Signed-off-by: Bo Shen Acked-by: Nicolas Ferre --- Changes in v2: - Add comments for the fslen extension bits. include/linux/atmel-ssc.h | 12 ++++++++++++ sound/soc/atmel/atmel_ssc_dai.c | 34 ++++++++++++++++++---------------- 2 files changed, 30 insertions(+), 16 deletions(-) diff --git a/include/linux/atmel-ssc.h b/include/linux/atmel-ssc.h index e8dd408..7c0f654 100644 --- a/include/linux/atmel-ssc.h +++ b/include/linux/atmel-ssc.h @@ -72,6 +72,12 @@ void ssc_free(struct ssc_device *ssc); #define SSC_RFMR_DATNB_OFFSET 8 #define SSC_RFMR_FSEDGE_SIZE 1 #define SSC_RFMR_FSEDGE_OFFSET 24 +/* + * The FSLEN_EXT exist on at91sam9rl, at91sam9g10, + * at91sam9g20, and at91sam9g45 and newer SoCs + */ +#define SSC_RFMR_FSLEN_EXT_SIZE 4 +#define SSC_RFMR_FSLEN_EXT_OFFSET 28 #define SSC_RFMR_FSLEN_SIZE 4 #define SSC_RFMR_FSLEN_OFFSET 16 #define SSC_RFMR_FSOS_SIZE 4 @@ -110,6 +116,12 @@ void ssc_free(struct ssc_device *ssc); #define SSC_TFMR_FSDEN_OFFSET 23 #define SSC_TFMR_FSEDGE_SIZE 1 #define SSC_TFMR_FSEDGE_OFFSET 24 +/* + * The FSLEN_EXT exist on at91sam9rl, at91sam9g10, + * at91sam9g20, and at91sam9g45 and newer SoCs + */ +#define SSC_TFMR_FSLEN_EXT_SIZE 4 +#define SSC_TFMR_FSLEN_EXT_OFFSET 28 #define SSC_TFMR_FSLEN_SIZE 4 #define SSC_TFMR_FSLEN_OFFSET 16 #define SSC_TFMR_FSOS_SIZE 3 diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index de433cfd..f403f39 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -347,6 +347,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, u32 tfmr, rfmr, tcmr, rcmr; int start_event; int ret; + int fslen, fslen_ext; /* * Currently, there is only one set of dma params for @@ -388,18 +389,6 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, } /* - * The SSC only supports up to 16-bit samples in I2S format, due - * to the size of the Frame Mode Register FSLEN field. - */ - if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S - && bits > 16) { - printk(KERN_WARNING - "atmel_ssc_dai: sample size %d " - "is too large for I2S\n", bits); - return -EINVAL; - } - - /* * Compute SSC register settings. */ switch (ssc_p->daifmt @@ -413,6 +402,17 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, * from the MCK divider, and the BCLK signal * is output on the SSC TK line. */ + + if (bits > 16 && !ssc->pdata->has_fslen_ext) { + dev_err(dai->dev, + "sample size %d is too large for SSC device\n", + bits); + return -EINVAL; + } + + fslen_ext = (bits - 1) / 16; + fslen = (bits - 1) % 16; + rcmr = SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period) | SSC_BF(RCMR_STTDLY, START_DELAY) | SSC_BF(RCMR_START, SSC_START_FALLING_RF) @@ -420,9 +420,10 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, | SSC_BF(RCMR_CKO, SSC_CKO_NONE) | SSC_BF(RCMR_CKS, SSC_CKS_DIV); - rfmr = SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) + rfmr = SSC_BF(RFMR_FSLEN_EXT, fslen_ext) + | SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) | SSC_BF(RFMR_FSOS, SSC_FSOS_NEGATIVE) - | SSC_BF(RFMR_FSLEN, (bits - 1)) + | SSC_BF(RFMR_FSLEN, fslen) | SSC_BF(RFMR_DATNB, (channels - 1)) | SSC_BIT(RFMR_MSBF) | SSC_BF(RFMR_LOOP, 0) @@ -435,10 +436,11 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, | SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS) | SSC_BF(TCMR_CKS, SSC_CKS_DIV); - tfmr = SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE) + tfmr = SSC_BF(TFMR_FSLEN_EXT, fslen_ext) + | SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE) | SSC_BF(TFMR_FSDEN, 0) | SSC_BF(TFMR_FSOS, SSC_FSOS_NEGATIVE) - | SSC_BF(TFMR_FSLEN, (bits - 1)) + | SSC_BF(TFMR_FSLEN, fslen) | SSC_BF(TFMR_DATNB, (channels - 1)) | SSC_BIT(TFMR_MSBF) | SSC_BF(TFMR_DATDEF, 0)