Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / arm / pxa2xx-pcm.c

diff --git a/kernel/sound/arm/pxa2xx-pcm.c b/kernel/sound/arm/pxa2xx-pcm.c
new file mode 100644 (file)
index 0000000..83be8e3
--- /dev/null
+++ b/kernel/sound/arm/pxa2xx-pcm.c
@@ -0,0 +1,135 @@
+/*
+ * linux/sound/arm/pxa2xx-pcm.c -- ALSA PCM interface for the Intel PXA2xx chip
+ *
+ * Author:     Nicolas Pitre
+ * Created:    Nov 30, 2004
+ * Copyright:  (C) 2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+
+#include <mach/dma.h>
+
+#include <sound/core.h>
+#include <sound/pxa2xx-lib.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "pxa2xx-pcm.h"
+
+static int pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
+{
+       struct pxa2xx_pcm_client *client = substream->private_data;
+
+       __pxa2xx_pcm_prepare(substream);
+
+       return client->prepare(substream);
+}
+
+static int pxa2xx_pcm_open(struct snd_pcm_substream *substream)
+{
+       struct pxa2xx_pcm_client *client = substream->private_data;
+       struct snd_pcm_runtime *runtime = substream->runtime;
+       struct pxa2xx_runtime_data *rtd;
+       int ret;
+
+       ret = __pxa2xx_pcm_open(substream);
+       if (ret)
+               goto out;
+
+       rtd = runtime->private_data;
+
+       rtd->params = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+                     client->playback_params : client->capture_params;
+       ret = pxa_request_dma("dma", DMA_PRIO_LOW,
+                             pxa2xx_pcm_dma_irq, substream);
+       if (ret < 0)
+               goto err2;
+       rtd->dma_ch = ret;
+
+       ret = client->startup(substream);
+       if (!ret)
+               goto out;
+
+       pxa_free_dma(rtd->dma_ch);
+ err2:
+       __pxa2xx_pcm_close(substream);
+ out:
+       return ret;
+}
+
+static int pxa2xx_pcm_close(struct snd_pcm_substream *substream)
+{
+       struct pxa2xx_pcm_client *client = substream->private_data;
+       struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
+
+       pxa_free_dma(rtd->dma_ch);
+       client->shutdown(substream);
+
+       return __pxa2xx_pcm_close(substream);
+}
+
+static struct snd_pcm_ops pxa2xx_pcm_ops = {
+       .open           = pxa2xx_pcm_open,
+       .close          = pxa2xx_pcm_close,
+       .ioctl          = snd_pcm_lib_ioctl,
+       .hw_params      = __pxa2xx_pcm_hw_params,
+       .hw_free        = __pxa2xx_pcm_hw_free,
+       .prepare        = pxa2xx_pcm_prepare,
+       .trigger        = pxa2xx_pcm_trigger,
+       .pointer        = pxa2xx_pcm_pointer,
+       .mmap           = pxa2xx_pcm_mmap,
+};
+
+int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
+                  struct snd_pcm **rpcm)
+{
+       struct snd_pcm *pcm;
+       int play = client->playback_params ? 1 : 0;
+       int capt = client->capture_params ? 1 : 0;
+       int ret;
+
+       ret = snd_pcm_new(card, "PXA2xx-PCM", 0, play, capt, &pcm);
+       if (ret)
+               goto out;
+
+       pcm->private_data = client;
+       pcm->private_free = pxa2xx_pcm_free_dma_buffers;
+
+       ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+       if (ret)
+               goto out;
+
+       if (play) {
+               int stream = SNDRV_PCM_STREAM_PLAYBACK;
+               snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
+               ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
+               if (ret)
+                       goto out;
+       }
+       if (capt) {
+               int stream = SNDRV_PCM_STREAM_CAPTURE;
+               snd_pcm_set_ops(pcm, stream, &pxa2xx_pcm_ops);
+               ret = pxa2xx_pcm_preallocate_dma_buffer(pcm, stream);
+               if (ret)
+                       goto out;
+       }
+
+       if (rpcm)
+               *rpcm = pcm;
+       ret = 0;
+
+ out:
+       return ret;
+}
+
+EXPORT_SYMBOL(pxa2xx_pcm_new);
+
+MODULE_AUTHOR("Nicolas Pitre");
+MODULE_DESCRIPTION("Intel PXA2xx PCM DMA module");
+MODULE_LICENSE("GPL");