Merge branch 'next/topic-dma-samsung' into next-samsung-devel

3 files changed, 71 insertions, 89 deletions

diff --git a/sound/soc/samsung/ac97.c b/sound/soc/samsung/ac97.c
index f97110e72e85..b4f9b0003685 100644
--- a/sound/soc/samsung/ac97.c
+++ b/sound/soc/samsung/ac97.c
@@ -271,7 +271,10 @@ static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
 
         writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
 
-        s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
+        if (!dma_data->ops)
+                dma_data->ops = samsung_dma_get_ops();
+
+        dma_data->ops->started(dma_data->channel);
 
         return 0;
 }
@@ -317,7 +320,10 @@ static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
 
         writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
 
-        s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
+        if (!dma_data->ops)
+                dma_data->ops = samsung_dma_get_ops();
+
+        dma_data->ops->started(dma_data->channel);
 
         return 0;
 }
diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
index 9465588b02f2..851346f7d68d 100644
--- a/sound/soc/samsung/dma.c
+++ b/sound/soc/samsung/dma.c
@@ -54,7 +54,6 @@ struct runtime_data {
         spinlock_t lock;
         int state;
         unsigned int dma_loaded;
-        unsigned int dma_limit;
         unsigned int dma_period;
         dma_addr_t dma_start;
         dma_addr_t dma_pos;
@@ -62,77 +61,79 @@ struct runtime_data {
         struct s3c_dma_params *params;
 };
 
+static void audio_buffdone(void *data);
+
 /* dma_enqueue
  *
  * place a dma buffer onto the queue for the dma system
  * to handle.
-*/
+ */
 static void dma_enqueue(struct snd_pcm_substream *substream)
 {
         struct runtime_data *prtd = substream->runtime->private_data;
         dma_addr_t pos = prtd->dma_pos;
         unsigned int limit;
-        int ret;
+        struct samsung_dma_prep_info dma_info;
 
         pr_debug("Entered %s\n", __func__);
 
-        if (s3c_dma_has_circular())
-                limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
-        else
-                limit = prtd->dma_limit;
+        limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
 
         pr_debug("%s: loaded %d, limit %d\n",
                                 __func__, prtd->dma_loaded, limit);
 
-        while (prtd->dma_loaded < limit) {
-                unsigned long len = prtd->dma_period;
+        dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
+        dma_info.direction =
+                (substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+                ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+        dma_info.fp = audio_buffdone;
+        dma_info.fp_param = substream;
+        dma_info.period = prtd->dma_period;
+        dma_info.len = prtd->dma_period*limit;
 
+        while (prtd->dma_loaded < limit) {
                 pr_debug("dma_loaded: %d\n", prtd->dma_loaded);
 
-                if ((pos + len) > prtd->dma_end) {
-                        len  = prtd->dma_end - pos;
-                        pr_debug("%s: corrected dma len %ld\n", __func__, len);
+                if ((pos + dma_info.period) > prtd->dma_end) {
+                        dma_info.period  = prtd->dma_end - pos;
+                        pr_debug("%s: corrected dma len %ld\n",
+                                        __func__, dma_info.period);
                 }
 
-                ret = s3c2410_dma_enqueue(prtd->params->channel,
-                        substream, pos, len);
+                dma_info.buf = pos;
+                prtd->params->ops->prepare(prtd->params->ch, &dma_info);
 
-                if (ret == 0) {
-                        prtd->dma_loaded++;
-                        pos += prtd->dma_period;
-                        if (pos >= prtd->dma_end)
-                                pos = prtd->dma_start;
-                } else
-                        break;
+                prtd->dma_loaded++;
+                pos += prtd->dma_period;
+                if (pos >= prtd->dma_end)
+                        pos = prtd->dma_start;
         }
 
         prtd->dma_pos = pos;
 }
 
-static void audio_buffdone(struct s3c2410_dma_chan *channel,
-                                void *dev_id, int size,
-                                enum s3c2410_dma_buffresult result)
+static void audio_buffdone(void *data)
 {
-        struct snd_pcm_substream *substream = dev_id;
-        struct runtime_data *prtd;
+        struct snd_pcm_substream *substream = data;
+        struct runtime_data *prtd = substream->runtime->private_data;
 
         pr_debug("Entered %s\n", __func__);
 
-        if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
-                return;
-
-        prtd = substream->runtime->private_data;
+        if (prtd->state & ST_RUNNING) {
+                prtd->dma_pos += prtd->dma_period;
+                if (prtd->dma_pos >= prtd->dma_end)
+                        prtd->dma_pos = prtd->dma_start;
 
-        if (substream)
-                snd_pcm_period_elapsed(substream);
+                if (substream)
+                        snd_pcm_period_elapsed(substream);
 
-        spin_lock(&prtd->lock);
-        if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
-                prtd->dma_loaded--;
-                dma_enqueue(substream);
+                spin_lock(&prtd->lock);
+                if (!samsung_dma_has_circular()) {
+                        prtd->dma_loaded--;
+                        dma_enqueue(substream);
+                }
+                spin_unlock(&prtd->lock);
         }
-
-        spin_unlock(&prtd->lock);
 }
 
 static int dma_hw_params(struct snd_pcm_substream *substream,
@@ -144,8 +145,7 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
         unsigned long totbytes = params_buffer_bytes(params);
         struct s3c_dma_params *dma =
                 snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-        int ret = 0;
-
+        struct samsung_dma_info dma_info;
 
         pr_debug("Entered %s\n", __func__);
 
@@ -163,30 +163,26 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
                 pr_debug("params %p, client %p, channel %d\n", prtd->params,
                         prtd->params->client, prtd->params->channel);
 
-                ret = s3c2410_dma_request(prtd->params->channel,
-                                          prtd->params->client, NULL);
-
-                if (ret < 0) {
-                        printk(KERN_ERR "failed to get dma channel\n");
-                        return ret;
-                }
-
-                /* use the circular buffering if we have it available. */
-                if (s3c_dma_has_circular())
-                        s3c2410_dma_setflags(prtd->params->channel,
-                                             S3C2410_DMAF_CIRCULAR);
+                prtd->params->ops = samsung_dma_get_ops();
+
+                dma_info.cap = (samsung_dma_has_circular() ?
+                        DMA_CYCLIC : DMA_SLAVE);
+                dma_info.client = prtd->params->client;
+                dma_info.direction =
+                        (substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+                        ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+                dma_info.width = prtd->params->dma_size;
+                dma_info.fifo = prtd->params->dma_addr;
+                prtd->params->ch = prtd->params->ops->request(
+                                prtd->params->channel, &dma_info);
         }
 
-        s3c2410_dma_set_buffdone_fn(prtd->params->channel,
-                                    audio_buffdone);
-
         snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
 
         runtime->dma_bytes = totbytes;
 
         spin_lock_irq(&prtd->lock);
         prtd->dma_loaded = 0;
-        prtd->dma_limit = runtime->hw.periods_min;
         prtd->dma_period = params_period_bytes(params);
         prtd->dma_start = runtime->dma_addr;
         prtd->dma_pos = prtd->dma_start;
@@ -206,7 +202,8 @@ static int dma_hw_free(struct snd_pcm_substream *substream)
         snd_pcm_set_runtime_buffer(substream, NULL);
 
         if (prtd->params) {
-                s3c2410_dma_free(prtd->params->channel, prtd->params->client);
+                prtd->params->ops->release(prtd->params->ch,
+                                        prtd->params->client);
                 prtd->params = NULL;
         }
 
@@ -225,23 +222,9 @@ static int dma_prepare(struct snd_pcm_substream *substream)
         if (!prtd->params)
                 return 0;
 
-        /* channel needs configuring for mem=>device, increment memory addr,
-         * sync to pclk, half-word transfers to the IIS-FIFO. */
-        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-                s3c2410_dma_devconfig(prtd->params->channel,
-                                      S3C2410_DMASRC_MEM,
-                                      prtd->params->dma_addr);
-        } else {
-                s3c2410_dma_devconfig(prtd->params->channel,
-                                      S3C2410_DMASRC_HW,
-                                      prtd->params->dma_addr);
-        }
-
-        s3c2410_dma_config(prtd->params->channel,
-                           prtd->params->dma_size);
-
         /* flush the DMA channel */
-        s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH);
+        prtd->params->ops->flush(prtd->params->ch);
+
         prtd->dma_loaded = 0;
         prtd->dma_pos = prtd->dma_start;
 
@@ -265,14 +248,14 @@ static int dma_trigger(struct snd_pcm_substream *substream, int cmd)
         case SNDRV_PCM_TRIGGER_RESUME:
         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
                 prtd->state |= ST_RUNNING;
-                s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START);
+                prtd->params->ops->trigger(prtd->params->ch);
                 break;
 
         case SNDRV_PCM_TRIGGER_STOP:
         case SNDRV_PCM_TRIGGER_SUSPEND:
         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                 prtd->state &= ~ST_RUNNING;
-                s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP);
+                prtd->params->ops->stop(prtd->params->ch);
                 break;
 
         default:
@@ -291,21 +274,12 @@ dma_pointer(struct snd_pcm_substream *substream)
         struct snd_pcm_runtime *runtime = substream->runtime;
         struct runtime_data *prtd = runtime->private_data;
         unsigned long res;
-        dma_addr_t src, dst;
 
         pr_debug("Entered %s\n", __func__);
 
-        spin_lock(&prtd->lock);
-        s3c2410_dma_getposition(prtd->params->channel, &src, &dst);
-
-        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
-                res = dst - prtd->dma_start;
-        else
-                res = src - prtd->dma_start;
-
-        spin_unlock(&prtd->lock);
+        res = prtd->dma_pos - prtd->dma_start;
 
-        pr_debug("Pointer %x %x\n", src, dst);
+        pr_debug("Pointer offset: %lu\n", res);
 
         /* we seem to be getting the odd error from the pcm library due
          * to out-of-bounds pointers. this is maybe due to the dma engine
diff --git a/sound/soc/samsung/dma.h b/sound/soc/samsung/dma.h
index c50659269a40..7d1ead77ef21 100644
--- a/sound/soc/samsung/dma.h
+++ b/sound/soc/samsung/dma.h
@@ -6,7 +6,7 @@
  *  Free Software Foundation;  either version 2 of the  License, or (at your
  *  option) any later version.
  *
- *  ALSA PCM interface for the Samsung S3C24xx CPU
+ *  ALSA PCM interface for the Samsung SoC
  */
 
 #ifndef _S3C_AUDIO_H
@@ -17,6 +17,8 @@ struct s3c_dma_params {
         int channel;                            /* Channel ID */
         dma_addr_t dma_addr;
         int dma_size;                   /* Size of the DMA transfer */
+        unsigned ch;
+        struct samsung_dma_ops *ops;
 };
 
 #endif