From patchwork Sun May 29 10:10:04 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Westerberg X-Patchwork-Id: 827382 Received: from bombadil.infradead.org (173-166-109-252-newengland.hfc.comcastbusiness.net [173.166.109.252]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4TAJIMX014091 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 29 May 2011 10:19:39 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by bombadil.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QQczM-0003L9-S4; Sun, 29 May 2011 10:12:53 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QQczK-0007p1-8d; Sun, 29 May 2011 10:12:50 +0000 Received: from mail-ey0-f177.google.com ([209.85.215.177]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QQcyr-0007mM-QK for linux-arm-kernel@lists.infradead.org; Sun, 29 May 2011 10:12:25 +0000 Received: by mail-ey0-f177.google.com with SMTP id 6so1205493eyh.36 for ; Sun, 29 May 2011 03:12:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:sender:from:to:cc:subject:date:message-id :x-mailer:in-reply-to:references:in-reply-to:references; bh=1ZT3m1X3ufq9Zg+c2VfA+0Pctx5g1vFX3h1xr1hsMlE=; b=vgQQQcsPiPjoHY5xFaBGZm2ncoefHemb2FSHFOJowh+U9i+2N3kIo0vh0rMVmgEgkg BR1yAm8xsFFB3T9ISHihppzHZJYF8OYKCBlSVc8ssl9X4vLiB0jVcD9NQcFRKOCrMBDt KH0DJ8HlDTYaMQCxA9YELqJMpHP+cIn7I0rvQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; b=w8zGSeY09e45coQY+IjD1Ij6IzRVqukkrxRjTWeBZC7s4Uh7ri5InoJxBEYt9MOvZw LV3cSKsfC4yYK+8y0V2hKmBoarfBzS+0XklBduYREaI6KeKw8jRU07lXwIT/7mcyqxKM F1DvknAwWRBuNWImMS0GAZcZJodMj4h9M0TbM= Received: by 10.14.28.204 with SMTP id g52mr1483423eea.173.1306663940882; Sun, 29 May 2011 03:12:20 -0700 (PDT) Received: from acer.healthdatacare.com (a88-115-37-157.elisa-laajakaista.fi [88.115.37.157]) by mx.google.com with ESMTPS id m14sm2446919eeh.26.2011.05.29.03.12.18 (version=SSLv3 cipher=OTHER); Sun, 29 May 2011 03:12:20 -0700 (PDT) From: Mika Westerberg To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 3/5] ASoC: ep93xx: convert to use the DMA engine API Date: Sun, 29 May 2011 13:10:04 +0300 Message-Id: X-Mailer: git-send-email 1.7.4.4 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110529_061222_220991_0AF2C3AB X-CRM114-Status: GOOD ( 22.33 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.215.177 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is freemail (mika.westerberg[at]gmail.com) 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 RFC_ABUSE_POST Both abuse and postmaster missing on sender domain 0.0 T_TO_NO_BRKTS_FREEMAIL T_TO_NO_BRKTS_FREEMAIL Cc: rmallon@gmail.com, vinod.koul@intel.com, Mika Westerberg , broonie@opensource.wolfsonmicro.com, linux-kernel@vger.kernel.org, grant.likely@secretlab.ca, hsweeten@visionengravers.com, dan.j.williams@intel.com, lrg@ti.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Sun, 29 May 2011 10:19:39 +0000 (UTC) Now that we have the EP93xx DMA engine driver in place, we convert the ASoC drivers (I2S, AC97 and PCM) to take advantage of this new API. There are no functional changes. Signed-off-by: Mika Westerberg Acked-by: H Hartley Sweeten Acked-by: Liam Girdwood Acked-by: Mark Brown --- sound/soc/ep93xx/ep93xx-ac97.c | 4 +- sound/soc/ep93xx/ep93xx-i2s.c | 4 +- sound/soc/ep93xx/ep93xx-pcm.c | 137 ++++++++++++++++++++++----------------- 3 files changed, 81 insertions(+), 64 deletions(-) diff --git a/sound/soc/ep93xx/ep93xx-ac97.c b/sound/soc/ep93xx/ep93xx-ac97.c index 104e95c..c7417c7 100644 --- a/sound/soc/ep93xx/ep93xx-ac97.c +++ b/sound/soc/ep93xx/ep93xx-ac97.c @@ -106,12 +106,12 @@ static struct ep93xx_ac97_info *ep93xx_ac97_info; static struct ep93xx_pcm_dma_params ep93xx_ac97_pcm_out = { .name = "ac97-pcm-out", - .dma_port = EP93XX_DMA_M2P_PORT_AAC1, + .dma_port = EP93XX_DMA_AAC1, }; static struct ep93xx_pcm_dma_params ep93xx_ac97_pcm_in = { .name = "ac97-pcm-in", - .dma_port = EP93XX_DMA_M2P_PORT_AAC1, + .dma_port = EP93XX_DMA_AAC1, }; static inline unsigned ep93xx_ac97_read_reg(struct ep93xx_ac97_info *info, diff --git a/sound/soc/ep93xx/ep93xx-i2s.c b/sound/soc/ep93xx/ep93xx-i2s.c index 042f4e9..30df425 100644 --- a/sound/soc/ep93xx/ep93xx-i2s.c +++ b/sound/soc/ep93xx/ep93xx-i2s.c @@ -70,11 +70,11 @@ struct ep93xx_i2s_info { struct ep93xx_pcm_dma_params ep93xx_i2s_dma_params[] = { [SNDRV_PCM_STREAM_PLAYBACK] = { .name = "i2s-pcm-out", - .dma_port = EP93XX_DMA_M2P_PORT_I2S1, + .dma_port = EP93XX_DMA_I2S1, }, [SNDRV_PCM_STREAM_CAPTURE] = { .name = "i2s-pcm-in", - .dma_port = EP93XX_DMA_M2P_PORT_I2S1, + .dma_port = EP93XX_DMA_I2S1, }, }; diff --git a/sound/soc/ep93xx/ep93xx-pcm.c b/sound/soc/ep93xx/ep93xx-pcm.c index a456e49..a07f99c 100644 --- a/sound/soc/ep93xx/ep93xx-pcm.c +++ b/sound/soc/ep93xx/ep93xx-pcm.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -53,43 +54,34 @@ static const struct snd_pcm_hardware ep93xx_pcm_hardware = { struct ep93xx_runtime_data { - struct ep93xx_dma_m2p_client cl; - struct ep93xx_pcm_dma_params *params; int pointer_bytes; - struct tasklet_struct period_tasklet; int periods; - struct ep93xx_dma_buffer buf[32]; + int period_bytes; + struct dma_chan *dma_chan; + struct ep93xx_dma_data dma_data; }; -static void ep93xx_pcm_period_elapsed(unsigned long data) +static void ep93xx_pcm_dma_callback(void *data) { - struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data; - snd_pcm_period_elapsed(substream); -} + struct snd_pcm_substream *substream = data; + struct ep93xx_runtime_data *rtd = substream->runtime->private_data; -static void ep93xx_pcm_buffer_started(void *cookie, - struct ep93xx_dma_buffer *buf) -{ + rtd->pointer_bytes += rtd->period_bytes; + rtd->pointer_bytes %= rtd->period_bytes * rtd->periods; + + snd_pcm_period_elapsed(substream); } -static void ep93xx_pcm_buffer_finished(void *cookie, - struct ep93xx_dma_buffer *buf, - int bytes, int error) +static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param) { - struct snd_pcm_substream *substream = cookie; - struct ep93xx_runtime_data *rtd = substream->runtime->private_data; - - if (buf == rtd->buf + rtd->periods - 1) - rtd->pointer_bytes = 0; - else - rtd->pointer_bytes += buf->size; + struct ep93xx_dma_data *data = filter_param; - if (!error) { - ep93xx_dma_m2p_submit_recursive(&rtd->cl, buf); - tasklet_schedule(&rtd->period_tasklet); - } else { - snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); + if (data->direction == ep93xx_dma_chan_direction(chan)) { + chan->private = data; + return true; } + + return false; } static int ep93xx_pcm_open(struct snd_pcm_substream *substream) @@ -98,30 +90,38 @@ static int ep93xx_pcm_open(struct snd_pcm_substream *substream) struct snd_soc_dai *cpu_dai = soc_rtd->cpu_dai; struct ep93xx_pcm_dma_params *dma_params; struct ep93xx_runtime_data *rtd; + dma_cap_mask_t mask; int ret; - dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream); + ret = snd_pcm_hw_constraint_integer(substream->runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) + return ret; + snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware); rtd = kmalloc(sizeof(*rtd), GFP_KERNEL); if (!rtd) return -ENOMEM; - memset(&rtd->period_tasklet, 0, sizeof(rtd->period_tasklet)); - rtd->period_tasklet.func = ep93xx_pcm_period_elapsed; - rtd->period_tasklet.data = (unsigned long)substream; - - rtd->cl.name = dma_params->name; - rtd->cl.flags = dma_params->dma_port | EP93XX_DMA_M2P_IGNORE_ERROR | - ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? - EP93XX_DMA_M2P_TX : EP93XX_DMA_M2P_RX); - rtd->cl.cookie = substream; - rtd->cl.buffer_started = ep93xx_pcm_buffer_started; - rtd->cl.buffer_finished = ep93xx_pcm_buffer_finished; - ret = ep93xx_dma_m2p_client_register(&rtd->cl); - if (ret < 0) { + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma_cap_set(DMA_CYCLIC, mask); + + dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream); + rtd->dma_data.port = dma_params->dma_port; + rtd->dma_data.name = dma_params->name; + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + rtd->dma_data.direction = DMA_TO_DEVICE; + else + rtd->dma_data.direction = DMA_FROM_DEVICE; + + rtd->dma_chan = dma_request_channel(mask, ep93xx_pcm_dma_filter, + &rtd->dma_data); + if (!rtd->dma_chan) { kfree(rtd); - return ret; + return -EINVAL; } substream->runtime->private_data = rtd; @@ -132,31 +132,52 @@ static int ep93xx_pcm_close(struct snd_pcm_substream *substream) { struct ep93xx_runtime_data *rtd = substream->runtime->private_data; - ep93xx_dma_m2p_client_unregister(&rtd->cl); + dma_release_channel(rtd->dma_chan); kfree(rtd); return 0; } +static int ep93xx_pcm_dma_submit(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct ep93xx_runtime_data *rtd = runtime->private_data; + struct dma_chan *chan = rtd->dma_chan; + struct dma_device *dma_dev = chan->device; + struct dma_async_tx_descriptor *desc; + + rtd->pointer_bytes = 0; + desc = dma_dev->device_prep_dma_cyclic(chan, runtime->dma_addr, + rtd->period_bytes * rtd->periods, + rtd->period_bytes, + rtd->dma_data.direction); + if (!desc) + return -EINVAL; + + desc->callback = ep93xx_pcm_dma_callback; + desc->callback_param = substream; + + dmaengine_submit(desc); + return 0; +} + +static void ep93xx_pcm_dma_flush(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct ep93xx_runtime_data *rtd = runtime->private_data; + + dmaengine_terminate_all(rtd->dma_chan); +} + static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_pcm_runtime *runtime = substream->runtime; struct ep93xx_runtime_data *rtd = runtime->private_data; - size_t totsize = params_buffer_bytes(params); - size_t period = params_period_bytes(params); - int i; snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); - runtime->dma_bytes = totsize; - - rtd->periods = (totsize + period - 1) / period; - for (i = 0; i < rtd->periods; i++) { - rtd->buf[i].bus_addr = runtime->dma_addr + (i * period); - rtd->buf[i].size = period; - if ((i + 1) * period > totsize) - rtd->buf[i].size = totsize - (i * period); - } + rtd->periods = params_periods(params); + rtd->period_bytes = params_period_bytes(params); return 0; } @@ -168,24 +189,20 @@ static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream) static int ep93xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { - struct ep93xx_runtime_data *rtd = substream->runtime->private_data; int ret; - int i; ret = 0; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - rtd->pointer_bytes = 0; - for (i = 0; i < rtd->periods; i++) - ep93xx_dma_m2p_submit(&rtd->cl, rtd->buf + i); + ret = ep93xx_pcm_dma_submit(substream); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - ep93xx_dma_m2p_flush(&rtd->cl); + ep93xx_pcm_dma_flush(substream); break; default: