From patchwork Wed Jun 29 18:00:18 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Nicolas Ferre X-Patchwork-Id: 929792 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p5TGuadu021641 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 29 Jun 2011 16:56:57 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qby2s-00030v-C6; Wed, 29 Jun 2011 16:55:24 +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 1Qby2q-0002er-PF; Wed, 29 Jun 2011 16:55:20 +0000 Received: from newsmtp5.atmel.com ([204.2.163.5] helo=sjogate2.atmel.com) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qby1A-0002FU-Tc for linux-arm-kernel@lists.infradead.org; Wed, 29 Jun 2011 16:53:42 +0000 Received: from meyreuil.atmel.fr ([10.159.254.132]) by sjogate2.atmel.com (8.13.6/8.13.6) with ESMTP id p5TGo299001588; Wed, 29 Jun 2011 09:50:04 -0700 (PDT) Received: from bendor.rfo.atmel.com ([10.159.245.201]) by meyreuil.atmel.fr (8.11.7p1+Sun/8.11.7) with ESMTP id p5TGr6a10835; Wed, 29 Jun 2011 18:53:06 +0200 (MEST) From: Nicolas Ferre To: alsa-devel@alsa-project.org, broonie@opensource.wolfsonmicro.com, lrg@ti.com Subject: [PATCH 4/5] ASoC: atmel_ssc_dai/atmel-pcm: adapt to dmaengine usage Date: Wed, 29 Jun 2011 20:00:18 +0200 Message-Id: <7fd26c605d5cfa422d0fc37a7b790fb9a837d7e3.1309368631.git.nicolas.ferre@atmel.com> X-Mailer: git-send-email 1.7.3 In-Reply-To: <1309370419-22810-1-git-send-email-nicolas.ferre@atmel.com> References: <1309370419-22810-1-git-send-email-nicolas.ferre@atmel.com> In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110629_125337_453781_98AE960F X-CRM114-Status: GOOD ( 21.47 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: Nicolas Ferre , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= 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: , 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 (demeter1.kernel.org [140.211.167.41]); Wed, 29 Jun 2011 16:56:57 +0000 (UTC) X-MIME-Autoconverted: from base64 to 8bit by demeter1.kernel.org id p5TGuadu021641 Change xfer_size name to apply to PDC and DMA aswell. Specify overrun bit in interrupt mask. Add dmaengine specific routines and replace PDC ones in pcm_ops if appropriate. Uses cyclic DMA API for queuing samples. Signed-off-by: Nicolas Ferre Signed-off-by: Uwe Kleine-König --- sound/soc/atmel/atmel-pcm.c | 382 +++++++++++++++++++++++++++++++++++--- sound/soc/atmel/atmel-pcm.h | 4 +- sound/soc/atmel/atmel_ssc_dai.c | 33 ++-- 3 files changed, 373 insertions(+), 46 deletions(-) diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c index 51dde4e..fee6696 100644 --- a/sound/soc/atmel/atmel-pcm.c +++ b/sound/soc/atmel/atmel-pcm.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include @@ -44,6 +45,8 @@ #include #include +#include + #include "atmel-pcm.h" @@ -53,7 +56,7 @@ /* TODO: These values were taken from the AT91 platform driver, check * them against real values for AT32 */ -static const struct snd_pcm_hardware atmel_pcm_hardware = { +static const struct snd_pcm_hardware atmel_pcm_pdc_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | @@ -66,6 +69,22 @@ static const struct snd_pcm_hardware atmel_pcm_hardware = { .buffer_bytes_max = 32 * 1024, }; +static const struct snd_pcm_hardware atmel_pcm_dma_hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_PAUSE, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .period_bytes_min = 256, /* not too low to absorb DMA programming overhead */ + .period_bytes_max = 2 * 0xffff, /* if 2 bytes format */ + .periods_min = 8, + .periods_max = 1024, /* no limit */ + .buffer_bytes_max = 64 * 1024, /* 64KiB */ +}; + +static const struct snd_pcm_hardware *atmel_pcm_hardware; + /*--------------------------------------------------------------------------*\ * Data types @@ -77,12 +96,19 @@ struct atmel_runtime_data { size_t period_size; dma_addr_t period_ptr; /* physical address of next period */ + int periods; /* period index of period_ptr */ /* PDC register save */ u32 pdc_xpr_save; u32 pdc_xcr_save; u32 pdc_xnpr_save; u32 pdc_xncr_save; + + /* dmaengine data */ + struct at_dma_slave atslave; + struct dma_async_tx_descriptor *desc; + dma_cookie_t cookie; + struct dma_chan *dma_chan; }; @@ -94,7 +120,7 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, { struct snd_pcm_substream *substream = pcm->streams[stream].substream; struct snd_dma_buffer *buf = &substream->dma_buffer; - size_t size = atmel_pcm_hardware.buffer_bytes_max; + size_t size = atmel_pcm_hardware->buffer_bytes_max; buf->dev.type = SNDRV_DMA_TYPE_DEV; buf->dev.dev = pcm->card->dev; @@ -116,7 +142,7 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, /*--------------------------------------------------------------------------*\ * ISR \*--------------------------------------------------------------------------*/ -static void atmel_pcm_dma_irq(u32 ssc_sr, +static void atmel_pcm_pdc_irq(u32 ssc_sr, struct snd_pcm_substream *substream) { struct atmel_runtime_data *prtd = substream->runtime->private_data; @@ -142,7 +168,7 @@ static void atmel_pcm_dma_irq(u32 ssc_sr, ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xcr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, params->mask->pdc_enable); } @@ -156,12 +182,163 @@ static void atmel_pcm_dma_irq(u32 ssc_sr, ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xncr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); } snd_pcm_period_elapsed(substream); } +/** + * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC + * + * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to + * check if any overrun occured. + */ +static void atmel_pcm_dma_irq(u32 ssc_sr, + struct snd_pcm_substream *substream) +{ + struct atmel_runtime_data *prtd = substream->runtime->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + + if (ssc_sr & params->mask->ssc_error) { + if (snd_pcm_running(substream)) + pr_warning("atmel-pcm: buffer %s on %s" + " (SSC_SR=%#x)\n", + substream->stream == SNDRV_PCM_STREAM_PLAYBACK + ? "underrun" : "overrun", + params->name, ssc_sr); + + /* stop RX and capture stream: will be enabled again at restart */ + ssc_writex(params->ssc->regs, SSC_CR, params->mask->ssc_disable); + snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); + + /* now drain RHR and read status to remove xrun condition */ + ssc_readx(params->ssc->regs, SSC_RHR); + ssc_readx(params->ssc->regs, SSC_SR); + } +} + +/*--------------------------------------------------------------------------*\ + * DMAENGINE operations +\*--------------------------------------------------------------------------*/ +static bool filter(struct dma_chan *chan, void *slave) +{ + struct at_dma_slave *sl = slave; + + if (sl->dma_dev == chan->device->dev) { + chan->private = sl; + return true; + } else { + return false; + } +} + +static int atmel_pcm_dma_alloc(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + struct ssc_device *ssc = prtd->params->ssc; + struct at_dma_slave *sdata = NULL; + + if (ssc->pdev) + sdata = ssc->pdev->dev.platform_data; + + if (sdata && sdata->dma_dev) { + dma_cap_mask_t mask; + + /* setup DMA addresses */ + sdata->rx_reg = (dma_addr_t)ssc->phybase + SSC_RHR; + sdata->tx_reg = (dma_addr_t)ssc->phybase + SSC_THR; + + /* Try to grab a DMA channel */ + dma_cap_zero(mask); + dma_cap_set(DMA_CYCLIC, mask); + prtd->dma_chan = dma_request_channel(mask, filter, sdata); + } + if (!prtd->dma_chan) { + pr_err("atmel-pcm: " + "DMA channel not available, unable to use SSC-audio\n"); + return -EBUSY; + } + + return 0; +} + +static void audio_dma_irq(void *data) +{ + struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data; + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + + prtd->period_ptr += prtd->period_size; + if (prtd->period_ptr >= prtd->dma_buffer_end) + prtd->period_ptr = prtd->dma_buffer; + + snd_pcm_period_elapsed(substream); +} + +static void atmel_pcm_dma_slave_config(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + struct dma_chan *chan = prtd->dma_chan; + struct dma_slave_config slave_config; + enum dma_slave_buswidth buswidth; + + switch (prtd->params->data_xfer_size) { + case 1: + buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; + break; + case 2: + buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; + break; + case 4: + buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; + break; + default: + return; + } + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + slave_config.direction = DMA_TO_DEVICE; + slave_config.dst_addr_width = buswidth; + } else { + slave_config.direction = DMA_FROM_DEVICE; + slave_config.src_addr_width = buswidth; + } + + dmaengine_slave_config(chan, &slave_config); +} + +static int atmel_pcm_dma_prep(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + struct dma_chan *chan = prtd->dma_chan; + + if (prtd->desc) + /* already been there: redo the prep job */ + dmaengine_terminate_all(chan); + + /* setup dma configuration */ + atmel_pcm_dma_slave_config(substream); + + prtd->desc = chan->device->device_prep_dma_cyclic(chan, prtd->dma_buffer, + prtd->period_size * prtd->periods, + prtd->period_size, + substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? + DMA_TO_DEVICE : DMA_FROM_DEVICE); + if (!prtd->desc) { + dev_err(&chan->dev->device, "cannot prepare slave dma\n"); + return -EINVAL; + } + + prtd->desc->callback = audio_dma_irq; + prtd->desc->callback_param = substream; + + return 0; +} /*--------------------------------------------------------------------------*\ * PCM operations @@ -172,6 +349,7 @@ static int atmel_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_runtime *runtime = substream->runtime; struct atmel_runtime_data *prtd = runtime->private_data; struct snd_soc_pcm_runtime *rtd = substream->private_data; + int ret; /* this may get called several times by oss emulation * with different params */ @@ -180,15 +358,35 @@ static int atmel_pcm_hw_params(struct snd_pcm_substream *substream, runtime->dma_bytes = params_buffer_bytes(params); prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); - prtd->params->dma_intr_handler = atmel_pcm_dma_irq; prtd->dma_buffer = runtime->dma_addr; prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes; prtd->period_size = params_period_bytes(params); + prtd->periods = params_periods(params); + + if (ssc_use_dmaengine()) { + if (prtd->dma_chan == NULL) { + ret = atmel_pcm_dma_alloc(substream, params); + if (ret) + return ret; + } + ret = atmel_pcm_dma_prep(substream); + if (ret) { + dma_release_channel(prtd->dma_chan); + prtd->dma_chan = NULL; + return ret; + } + + prtd->params->dma_intr_handler = atmel_pcm_dma_irq; + } else { + prtd->params->dma_intr_handler = atmel_pcm_pdc_irq; + } pr_debug("atmel-pcm: " - "hw_params: DMA for %s initialized " + "hw_params: %s%s for %s initialized " "(dma_bytes=%u, period_size=%u)\n", + prtd->dma_chan ? "DMA " : "PDC", + prtd->dma_chan ? dma_chan_name(prtd->dma_chan): "", prtd->params->name, runtime->dma_bytes, prtd->period_size); @@ -201,15 +399,30 @@ static int atmel_pcm_hw_free(struct snd_pcm_substream *substream) struct atmel_pcm_dma_params *params = prtd->params; if (params != NULL) { - ssc_writex(params->ssc->regs, SSC_PDC_PTCR, - params->mask->pdc_disable); + if (ssc_use_dmaengine()) { + struct dma_chan *chan = prtd->dma_chan; + + if (chan) { + dmaengine_terminate_all(chan); + prtd->cookie = 0; + prtd->desc = NULL; + dma_release_channel(chan); + prtd->dma_chan = NULL; + } + } else { + ssc_writex(params->ssc->regs, SSC_PDC_PTCR, + params->mask->pdc_disable); + } prtd->params->dma_intr_handler = NULL; } return 0; } -static int atmel_pcm_prepare(struct snd_pcm_substream *substream) +/*--------------------------------------------------------------------------*\ + * PCM callbacks using PDC +\*--------------------------------------------------------------------------*/ +static int atmel_pcm_pdc_prepare(struct snd_pcm_substream *substream) { struct atmel_runtime_data *prtd = substream->runtime->private_data; struct atmel_pcm_dma_params *params = prtd->params; @@ -221,7 +434,7 @@ static int atmel_pcm_prepare(struct snd_pcm_substream *substream) return 0; } -static int atmel_pcm_trigger(struct snd_pcm_substream *substream, +static int atmel_pcm_pdc_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_pcm_runtime *rtd = substream->runtime; @@ -240,13 +453,13 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream, ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xcr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); prtd->period_ptr += prtd->period_size; ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->period_ptr); ssc_writex(params->ssc->regs, params->pdc->xncr, - prtd->period_size / params->pdc_xfer_size); + prtd->period_size / params->data_xfer_size); pr_debug("atmel-pcm: trigger: " "period_ptr=%lx, xpr=%u, " @@ -264,7 +477,7 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream, pr_debug("sr=%u imr=%u\n", ssc_readx(params->ssc->regs, SSC_SR), - ssc_readx(params->ssc->regs, SSC_IER)); + ssc_readx(params->ssc->regs, SSC_IMR)); break; /* SNDRV_PCM_TRIGGER_START */ case SNDRV_PCM_TRIGGER_STOP: @@ -287,7 +500,7 @@ static int atmel_pcm_trigger(struct snd_pcm_substream *substream, return ret; } -static snd_pcm_uframes_t atmel_pcm_pointer( +static snd_pcm_uframes_t atmel_pcm_pdc_pointer( struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; @@ -305,13 +518,107 @@ static snd_pcm_uframes_t atmel_pcm_pointer( return x; } +/*--------------------------------------------------------------------------*\ + * PCM callbacks using DMAENGINE +\*--------------------------------------------------------------------------*/ +static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream) +{ + struct atmel_runtime_data *prtd = substream->runtime->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + + ssc_writex(params->ssc->regs, SSC_IDR, params->mask->ssc_error); + return 0; +} + +static int atmel_pcm_dma_trigger(struct snd_pcm_substream *substream, + int cmd) +{ + struct snd_pcm_runtime *rtd = substream->runtime; + struct atmel_runtime_data *prtd = rtd->private_data; + struct atmel_pcm_dma_params *params = prtd->params; + dma_cookie_t cookie; + int ret = 0; + + pr_debug("atmel-pcm: trigger %d: buffer_size = %ld," + " dma_area = %p, dma_bytes = %u\n", + cmd, rtd->buffer_size, rtd->dma_area, rtd->dma_bytes); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + + if (prtd->cookie < DMA_MIN_COOKIE) { + cookie = dmaengine_submit(prtd->desc); + if (dma_submit_error(cookie)) { + ret = -EINVAL; + break; + } + prtd->cookie = cookie; + prtd->period_ptr = prtd->dma_buffer; + } + + + pr_debug("atmel-pcm: trigger: start sr=0x%08x imr=0x%08u\n", + ssc_readx(params->ssc->regs, SSC_SR), + ssc_readx(params->ssc->regs, SSC_IMR)); + + /* fallback */ + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + dmaengine_resume(prtd->dma_chan); + + /* It not already done or comming from xrun state */ + ssc_readx(params->ssc->regs, SSC_SR); + ssc_writex(params->ssc->regs, SSC_IER, params->mask->ssc_error); + ssc_writex(params->ssc->regs, SSC_CR, params->mask->ssc_enable); + + break; + case SNDRV_PCM_TRIGGER_STOP: + pr_debug("atmel-pcm: trigger: stop cmd = %d\n", cmd); + + ssc_writex(params->ssc->regs, SSC_IDR, params->mask->ssc_error); + + /* fallback */ + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + dmaengine_pause(prtd->dma_chan); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static snd_pcm_uframes_t atmel_pcm_dma_pointer( + struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct atmel_runtime_data *prtd = runtime->private_data; + snd_pcm_uframes_t x; + + dev_vdbg(substream->pcm->card->dev, "%s: 0x%08x %ld\n", + __func__, prtd->period_ptr, + bytes_to_frames(runtime, prtd->period_ptr - prtd->dma_buffer)); + + x = bytes_to_frames(runtime, prtd->period_ptr - prtd->dma_buffer); + + if (x >= runtime->buffer_size) + x = 0; + + return x; +} + + +/*--------------------------------------------------------------------------*\ + * PCM open/close/mmap +\*--------------------------------------------------------------------------*/ static int atmel_pcm_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct atmel_runtime_data *prtd; int ret = 0; - snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware); + snd_soc_set_runtime_hwparams(substream, atmel_pcm_hardware); /* ensure that buffer size is a multiple of period size */ ret = snd_pcm_hw_constraint_integer(runtime, @@ -352,9 +659,9 @@ static struct snd_pcm_ops atmel_pcm_ops = { .ioctl = snd_pcm_lib_ioctl, .hw_params = atmel_pcm_hw_params, .hw_free = atmel_pcm_hw_free, - .prepare = atmel_pcm_prepare, - .trigger = atmel_pcm_trigger, - .pointer = atmel_pcm_pointer, + .prepare = atmel_pcm_pdc_prepare, + .trigger = atmel_pcm_pdc_trigger, + .pointer = atmel_pcm_pdc_pointer, .mmap = atmel_pcm_mmap, }; @@ -426,14 +733,16 @@ static int atmel_pcm_suspend(struct snd_soc_dai *dai) prtd = runtime->private_data; params = prtd->params; - /* disable the PDC and save the PDC registers */ + if (!ssc_use_dmaengine()) { + /* disable the PDC and save the PDC registers */ - ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable); + ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable); - prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr); - prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr); - prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr); - prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr); + prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr); + prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr); + prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr); + prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr); + } return 0; } @@ -450,13 +759,15 @@ static int atmel_pcm_resume(struct snd_soc_dai *dai) prtd = runtime->private_data; params = prtd->params; - /* restore the PDC registers and enable the PDC */ - ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save); - ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save); - ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save); - ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save); + if (!ssc_use_dmaengine()) { + /* restore the PDC registers and enable the PDC */ + ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save); + ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save); + ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save); + ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save); - ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable); + ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable); + } return 0; } #else @@ -495,6 +806,15 @@ static struct platform_driver atmel_pcm_driver = { static int __init snd_atmel_pcm_init(void) { + if (ssc_use_dmaengine()) { + atmel_pcm_ops.prepare = atmel_pcm_dma_prepare; + atmel_pcm_ops.trigger = atmel_pcm_dma_trigger; + atmel_pcm_ops.pointer = atmel_pcm_dma_pointer; + + atmel_pcm_hardware = &atmel_pcm_dma_hardware; + } else { + atmel_pcm_hardware = &atmel_pcm_pdc_hardware; + } return platform_driver_register(&atmel_pcm_driver); } module_init(snd_atmel_pcm_init); diff --git a/sound/soc/atmel/atmel-pcm.h b/sound/soc/atmel/atmel-pcm.h index 5e0a95e..b007376 100644 --- a/sound/soc/atmel/atmel-pcm.h +++ b/sound/soc/atmel/atmel-pcm.h @@ -50,6 +50,7 @@ struct atmel_pdc_regs { struct atmel_ssc_mask { u32 ssc_enable; /* SSC recv/trans enable */ u32 ssc_disable; /* SSC recv/trans disable */ + u32 ssc_error; /* SSC error conditions */ u32 ssc_endx; /* SSC ENDTX or ENDRX */ u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ u32 pdc_enable; /* PDC recv/trans enable */ @@ -66,7 +67,8 @@ struct atmel_ssc_mask { */ struct atmel_pcm_dma_params { char *name; /* stream identifier */ - int pdc_xfer_size; /* PDC counter increment in bytes */ + int data_xfer_size; /* PDC counter increment in bytes, + DMA data transfer size in bytes */ struct ssc_device *ssc; /* SSC device for stream */ struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */ struct atmel_ssc_mask *mask; /* SSC & PDC status bits */ diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c index a7a7bbc..9412fc3 100644 --- a/sound/soc/atmel/atmel_ssc_dai.c +++ b/sound/soc/atmel/atmel_ssc_dai.c @@ -48,7 +48,8 @@ #include "atmel_ssc_dai.h" -#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20) +#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20) \ + || defined(CONFIG_ARCH_AT91SAM9X5) #define NUM_SSC_DEVICES 1 #else #define NUM_SSC_DEVICES 3 @@ -86,6 +87,7 @@ static struct atmel_ssc_mask ssc_tx_mask = { static struct atmel_ssc_mask ssc_rx_mask = { .ssc_enable = SSC_BIT(CR_RXEN), .ssc_disable = SSC_BIT(CR_RXDIS), + .ssc_error = SSC_BIT(SR_OVRUN), .ssc_endx = SSC_BIT(SR_ENDRX), .ssc_endbuf = SSC_BIT(SR_RXBUFF), .pdc_enable = ATMEL_PDC_RXTEN, @@ -183,7 +185,8 @@ static irqreturn_t atmel_ssc_interrupt(int irq, void *dev_id) if ((dma_params != NULL) && (dma_params->dma_intr_handler != NULL)) { ssc_substream_mask = (dma_params->mask->ssc_endx | - dma_params->mask->ssc_endbuf); + dma_params->mask->ssc_endbuf | + dma_params->mask->ssc_error); if (ssc_sr & ssc_substream_mask) { dma_params->dma_intr_handler(ssc_sr, dma_params-> @@ -376,19 +379,19 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, switch (params_format(params)) { case SNDRV_PCM_FORMAT_S8: bits = 8; - dma_params->pdc_xfer_size = 1; + dma_params->data_xfer_size = 1; break; case SNDRV_PCM_FORMAT_S16_LE: bits = 16; - dma_params->pdc_xfer_size = 2; + dma_params->data_xfer_size = 2; break; case SNDRV_PCM_FORMAT_S24_LE: bits = 24; - dma_params->pdc_xfer_size = 4; + dma_params->data_xfer_size = 4; break; case SNDRV_PCM_FORMAT_S32_LE: bits = 32; - dma_params->pdc_xfer_size = 4; + dma_params->data_xfer_size = 4; break; default: printk(KERN_WARNING "atmel_ssc_dai: unsupported PCM format"); @@ -561,15 +564,17 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream, /* Reset the SSC and its PDC registers */ ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST)); - ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0); + if (!ssc_use_dmaengine()) { + ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); - ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0); + ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0); + } ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0, ssc_p->name, ssc_p);