ASoC: imx-pcm-dma: Use dmaengine PCM helper functions

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 28 insertions, 149 deletions

diff --git a/sound/soc/imx/Kconfig b/sound/soc/imx/Kconfig
index e89139ffbce1..192861c2b4af 100644
--- a/sound/soc/imx/Kconfig
+++ b/sound/soc/imx/Kconfig
@@ -14,6 +14,7 @@ config SND_MXC_SOC_FIQ
         tristate
 
 config SND_MXC_SOC_MX2
+        select SND_SOC_DMAENGINE_PCM
         tristate
 
 config SND_MXC_SOC_WM1133_EV1
diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c
index f974e61fa68c..4cd5462049bc 100644
--- a/sound/soc/imx/imx-pcm-dma-mx2.c
+++ b/sound/soc/imx/imx-pcm-dma-mx2.c
@@ -27,104 +27,42 @@
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
 
 #include <mach/dma.h>
 
 #include "imx-ssi.h"
 
-struct imx_pcm_runtime_data {
-        int period_bytes;
-        int periods;
-        unsigned long offset;
-        struct dma_async_tx_descriptor *desc;
-        struct dma_chan *dma_chan;
-        struct imx_dma_data dma_data;
-};
-
-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 imx_pcm_runtime_data *iprtd = runtime->private_data;
-
-        iprtd->offset += iprtd->period_bytes;
-        iprtd->offset %= iprtd->period_bytes * iprtd->periods;
-
-        snd_pcm_period_elapsed(substream);
-}
-
 static bool filter(struct dma_chan *chan, void *param)
 {
-        struct imx_pcm_runtime_data *iprtd = param;
-
         if (!imx_dma_is_general_purpose(chan))
                 return false;
 
-        chan->private = &iprtd->dma_data;
+        chan->private = param;
 
-        return true;
-}
-
-static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)
-{
-        struct snd_soc_pcm_runtime *rtd = substream->private_data;
-        struct imx_pcm_dma_params *dma_params;
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-        dma_cap_mask_t mask;
-
-        dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
-        iprtd->dma_data.peripheral_type = IMX_DMATYPE_SSI;
-        iprtd->dma_data.priority = DMA_PRIO_HIGH;
-        iprtd->dma_data.dma_request = dma_params->dma;
-
-        /* Try to grab a DMA channel */
-        dma_cap_zero(mask);
-        dma_cap_set(DMA_SLAVE, mask);
-        iprtd->dma_chan = dma_request_channel(mask, filter, iprtd);
-        if (!iprtd->dma_chan)
-                return -EINVAL;
-
-        return 0;
+        return true;
 }
 
 static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
                                 struct snd_pcm_hw_params *params)
 {
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-        struct dma_chan *chan = iprtd->dma_chan;
+        struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
         struct imx_pcm_dma_params *dma_params;
         struct dma_slave_config slave_config;
-        enum dma_slave_buswidth buswidth;
-        unsigned long dma_addr;
         int ret;
 
         dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
-        switch (params_format(params)) {
-        case SNDRV_PCM_FORMAT_S16_LE:
-                buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
-                break;
-        case SNDRV_PCM_FORMAT_S20_3LE:
-        case SNDRV_PCM_FORMAT_S24_LE:
-                buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
-                break;
-        default:
-                return 0;
-        }
+        ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config);
+        if (ret)
+                return ret;
 
         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-                slave_config.direction = DMA_MEM_TO_DEV;
                 slave_config.dst_addr = dma_params->dma_addr;
-                slave_config.dst_addr_width = buswidth;
                 slave_config.dst_maxburst = dma_params->burstsize;
         } else {
-                slave_config.direction = DMA_DEV_TO_MEM;
                 slave_config.src_addr = dma_params->dma_addr;
-                slave_config.src_addr_width = buswidth;
                 slave_config.src_maxburst = dma_params->burstsize;
         }
 
@@ -132,68 +70,11 @@ static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
         if (ret)
                 return ret;
 
-
-        iprtd->periods = params_periods(params);
-        iprtd->period_bytes = params_period_bytes(params);
-        iprtd->offset = 0;
-
         snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
 
-        dma_addr = runtime->dma_addr;
-
-        iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr,
-                        iprtd->period_bytes * iprtd->periods,
-                        iprtd->period_bytes,
-                        substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
-                        DMA_MEM_TO_DEV : DMA_DEV_TO_MEM);
-        if (!iprtd->desc) {
-                dev_err(&chan->dev->device, "cannot prepare slave dma\n");
-                return -EINVAL;
-        }
-
-        iprtd->desc->callback = audio_dma_irq;
-        iprtd->desc->callback_param = substream;
-
-        return 0;
-}
-
-static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
-{
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
-        switch (cmd) {
-        case SNDRV_PCM_TRIGGER_START:
-        case SNDRV_PCM_TRIGGER_RESUME:
-        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
-                dmaengine_submit(iprtd->desc);
-
-                break;
-
-        case SNDRV_PCM_TRIGGER_STOP:
-        case SNDRV_PCM_TRIGGER_SUSPEND:
-        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-                dmaengine_terminate_all(iprtd->dma_chan);
-
-                break;
-        default:
-                return -EINVAL;
-        }
-
         return 0;
 }
 
-static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
-{
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd = runtime->private_data;
-
-        pr_debug("%s: %ld %ld\n", __func__, iprtd->offset,
-                        bytes_to_frames(substream->runtime, iprtd->offset));
-
-        return bytes_to_frames(substream->runtime, iprtd->offset);
-}
-
 static struct snd_pcm_hardware snd_imx_hardware = {
         .info = SNDRV_PCM_INFO_INTERLEAVED |
                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
@@ -215,40 +96,37 @@ static struct snd_pcm_hardware snd_imx_hardware = {
 
 static int snd_imx_open(struct snd_pcm_substream *substream)
 {
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd;
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct imx_pcm_dma_params *dma_params;
+        struct imx_dma_data *dma_data;
         int ret;
 
-        iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
-        if (iprtd == NULL)
-                return -ENOMEM;
-        runtime->private_data = iprtd;
+        snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
 
-        ret = snd_pcm_hw_constraint_integer(substream->runtime,
-                        SNDRV_PCM_HW_PARAM_PERIODS);
-        if (ret < 0) {
-                kfree(iprtd);
-                return ret;
-        }
+        dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
-        ret = imx_ssi_dma_alloc(substream);
-        if (ret < 0) {
-                kfree(iprtd);
-                return ret;
+        dma_data = kzalloc(sizeof(*dma_data), GFP_KERNEL);
+        dma_data->peripheral_type = IMX_DMATYPE_SSI;
+        dma_data->priority = DMA_PRIO_HIGH;
+        dma_data->dma_request = dma_params->dma;
+
+        ret = snd_dmaengine_pcm_open(substream, filter, dma_data);
+        if (ret) {
+                kfree(dma_data);
+                return 0;
         }
 
-        snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
+        snd_dmaengine_pcm_set_data(substream, dma_data);
 
         return 0;
 }
 
 static int snd_imx_close(struct snd_pcm_substream *substream)
 {
-        struct snd_pcm_runtime *runtime = substream->runtime;
-        struct imx_pcm_runtime_data *iprtd = runtime->private_data;
+        struct imx_dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
 
-        dma_release_channel(iprtd->dma_chan);
-        kfree(iprtd);
+        snd_dmaengine_pcm_close(substream);
+        kfree(dma_data);
 
         return 0;
 }
@@ -258,8 +136,8 @@ static struct snd_pcm_ops imx_pcm_ops = {
         .close          = snd_imx_close,
         .ioctl          = snd_pcm_lib_ioctl,
         .hw_params      = snd_imx_pcm_hw_params,
-        .trigger        = snd_imx_pcm_trigger,
-        .pointer        = snd_imx_pcm_pointer,
+        .trigger        = snd_dmaengine_pcm_trigger,
+        .pointer        = snd_dmaengine_pcm_pointer,
         .mmap           = snd_imx_pcm_mmap,
 };