ASoC: mmp: add audio dma support

mmp-pcm handle audio dma based on soc-dmaengine
Support mmp and pxa910

Signed-off-by: Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Leo Yan <leoy@marvell.com>
Signed-off-by: Qiao Zhou <zhouqiao@marvell.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/include/linux/platform_data/mmp_audio.h b/include/linux/platform_data/mmp_audio.h
new file mode 100644 (file)
index 0000000..0f25d16
--- /dev/null
+++ b/include/linux/platform_data/mmp_audio.h
@@ -0,0 +1,22 @@
+/*
+ *  MMP Platform AUDIO Management
+ *
+ *  Copyright (c) 2011 Marvell Semiconductors 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.
+ *
+ */
+
+#ifndef MMP_AUDIO_H
+#define MMP_AUDIO_H
+
+struct mmp_audio_platdata {
+       u32 period_max_capture;
+       u32 buffer_max_capture;
+       u32 period_max_playback;
+       u32 buffer_max_playback;
+};
+
+#endif /* MMP_AUDIO_H */

diff --git a/sound/soc/pxa/Kconfig b/sound/soc/pxa/Kconfig
index a0f7d3cfa470b0857586b10021290aec5b4fd20f..5d76e2971fbee6dfbac76d7288169292a22e0bca 100644 (file)
--- a/sound/soc/pxa/Kconfig
+++ b/sound/soc/pxa/Kconfig
@@ -8,6 +8,15 @@ config SND_PXA2XX_SOC
          the PXA2xx AC97, I2S or SSP interface. You will also need
          to select the audio interfaces to support below.
 
+config SND_MMP_SOC
+       bool "Soc Audio for Marvell MMP chips"
+       depends on ARCH_MMP
+       select SND_SOC_DMAENGINE_PCM
+       select SND_ARM
+       help
+         Say Y if you want to add support for codecs attached to
+         the MMP SSPA interface.
+
 config SND_PXA2XX_AC97
        tristate
        select SND_AC97_CODEC

diff --git a/sound/soc/pxa/Makefile b/sound/soc/pxa/Makefile
index af357623be9dccc7478aa2df03a1f9338eef4190..f913e9bfce4fe6deac67924404445db1744a3079 100644 (file)
--- a/sound/soc/pxa/Makefile
+++ b/sound/soc/pxa/Makefile
@@ -3,11 +3,13 @@ snd-soc-pxa2xx-objs := pxa2xx-pcm.o
 snd-soc-pxa2xx-ac97-objs := pxa2xx-ac97.o
 snd-soc-pxa2xx-i2s-objs := pxa2xx-i2s.o
 snd-soc-pxa-ssp-objs := pxa-ssp.o
+snd-soc-mmp-objs := mmp-pcm.o
 
 obj-$(CONFIG_SND_PXA2XX_SOC) += snd-soc-pxa2xx.o
 obj-$(CONFIG_SND_PXA2XX_SOC_AC97) += snd-soc-pxa2xx-ac97.o
 obj-$(CONFIG_SND_PXA2XX_SOC_I2S) += snd-soc-pxa2xx-i2s.o
 obj-$(CONFIG_SND_PXA_SOC_SSP) += snd-soc-pxa-ssp.o
+obj-$(CONFIG_SND_MMP_SOC) += snd-soc-mmp.o
 
 # PXA Machine Support
 snd-soc-corgi-objs := corgi.o

diff --git a/sound/soc/pxa/mmp-pcm.c b/sound/soc/pxa/mmp-pcm.c
new file mode 100644 (file)
index 0000000..73ac546
--- /dev/null
+++ b/sound/soc/pxa/mmp-pcm.c
@@ -0,0 +1,297 @@
+/*
+ * linux/sound/soc/pxa/mmp-pcm.c
+ *
+ * Copyright (C) 2011 Marvell International Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/platform_data/mmp_audio.h>
+#include <sound/pxa2xx-lib.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <mach/sram.h>
+#include <sound/dmaengine_pcm.h>
+
+struct mmp_dma_data {
+       int ssp_id;
+       struct resource *dma_res;
+};
+
+#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP |    \
+               SNDRV_PCM_INFO_MMAP_VALID |     \
+               SNDRV_PCM_INFO_INTERLEAVED |    \
+               SNDRV_PCM_INFO_PAUSE |          \
+               SNDRV_PCM_INFO_RESUME)
+
+#define MMP_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+                        SNDRV_PCM_FMTBIT_S24_LE | \
+                        SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_pcm_hardware mmp_pcm_hardware[] = {
+       {
+               .info                   = MMP_PCM_INFO,
+               .formats                = MMP_PCM_FORMATS,
+               .period_bytes_min       = 1024,
+               .period_bytes_max       = 2048,
+               .periods_min            = 2,
+               .periods_max            = 32,
+               .buffer_bytes_max       = 4096,
+               .fifo_size              = 32,
+       },
+       {
+               .info                   = MMP_PCM_INFO,
+               .formats                = MMP_PCM_FORMATS,
+               .period_bytes_min       = 1024,
+               .period_bytes_max       = 2048,
+               .periods_min            = 2,
+               .periods_max            = 32,
+               .buffer_bytes_max       = 4096,
+               .fifo_size              = 32,
+       },
+};
+
+static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
+                             struct snd_pcm_hw_params *params)
+{
+       struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct pxa2xx_pcm_dma_params *dma_params;
+       struct dma_slave_config slave_config;
+       int ret;
+
+       dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+       if (!dma_params)
+               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.dst_addr     = dma_params->dev_addr;
+               slave_config.dst_maxburst = 4;
+       } else {
+               slave_config.src_addr     = dma_params->dev_addr;
+               slave_config.src_maxburst = 4;
+       }
+
+       ret = dmaengine_slave_config(chan, &slave_config);
+       if (ret)
+               return ret;
+
+       snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+       return 0;
+}
+
+static bool filter(struct dma_chan *chan, void *param)
+{
+       struct mmp_dma_data *dma_data = param;
+       bool found = false;
+       char *devname;
+
+       devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
+               dma_data->ssp_id);
+       if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
+               (chan->chan_id == dma_data->dma_res->start)) {
+               found = true;
+       }
+
+       kfree(devname);
+       return found;
+}
+
+static int mmp_pcm_open(struct snd_pcm_substream *substream)
+{
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct platform_device *pdev = to_platform_device(rtd->platform->dev);
+       struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+       struct mmp_dma_data *dma_data;
+       struct resource *r;
+       int ret;
+
+       r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
+       if (!r)
+               return -EBUSY;
+
+       snd_soc_set_runtime_hwparams(substream,
+                               &mmp_pcm_hardware[substream->stream]);
+       dma_data = devm_kzalloc(&pdev->dev,
+                       sizeof(struct mmp_dma_data), GFP_KERNEL);
+       if (dma_data == NULL)
+               return -ENOMEM;
+
+       dma_data->dma_res = r;
+       dma_data->ssp_id = cpu_dai->id;
+
+       ret = snd_dmaengine_pcm_open(substream, filter, dma_data);
+       if (ret) {
+               devm_kfree(&pdev->dev, dma_data);
+               return ret;
+       }
+
+       snd_dmaengine_pcm_set_data(substream, dma_data);
+       return 0;
+}
+
+static int mmp_pcm_close(struct snd_pcm_substream *substream)
+{
+       struct mmp_dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
+       struct snd_soc_pcm_runtime *rtd = substream->private_data;
+       struct platform_device *pdev = to_platform_device(rtd->platform->dev);
+
+       snd_dmaengine_pcm_close(substream);
+       devm_kfree(&pdev->dev, dma_data);
+       return 0;
+}
+
+static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
+                        struct vm_area_struct *vma)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+       unsigned long off = vma->vm_pgoff;
+
+       vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+       return remap_pfn_range(vma, vma->vm_start,
+               __phys_to_pfn(runtime->dma_addr) + off,
+               vma->vm_end - vma->vm_start, vma->vm_page_prot);
+}
+
+struct snd_pcm_ops mmp_pcm_ops = {
+       .open           = mmp_pcm_open,
+       .close          = mmp_pcm_close,
+       .ioctl          = snd_pcm_lib_ioctl,
+       .hw_params      = mmp_pcm_hw_params,
+       .trigger        = snd_dmaengine_pcm_trigger,
+       .pointer        = snd_dmaengine_pcm_pointer,
+       .mmap           = mmp_pcm_mmap,
+};
+
+static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
+{
+       struct snd_pcm_substream *substream;
+       struct snd_dma_buffer *buf;
+       int stream;
+       struct gen_pool *gpool;
+
+       gpool = sram_get_gpool("asram");
+       if (!gpool)
+               return;
+
+       for (stream = 0; stream < 2; stream++) {
+               size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
+
+               substream = pcm->streams[stream].substream;
+               if (!substream)
+                       continue;
+
+               buf = &substream->dma_buffer;
+               if (!buf->area)
+                       continue;
+               gen_pool_free(gpool, (unsigned long)buf->area, size);
+               buf->area = NULL;
+       }
+
+       return;
+}
+
+static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
+                                                               int stream)
+{
+       struct snd_dma_buffer *buf = &substream->dma_buffer;
+       size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
+       struct gen_pool *gpool;
+
+       buf->dev.type = SNDRV_DMA_TYPE_DEV;
+       buf->dev.dev = substream->pcm->card->dev;
+       buf->private_data = NULL;
+
+       gpool = sram_get_gpool("asram");
+       if (!gpool)
+               return -ENOMEM;
+
+       buf->area = (unsigned char *)gen_pool_alloc(gpool, size);
+       if (!buf->area)
+               return -ENOMEM;
+       buf->addr = gen_pool_virt_to_phys(gpool, (unsigned long)buf->area);
+       buf->bytes = size;
+       return 0;
+}
+
+int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+       struct snd_pcm_substream *substream;
+       struct snd_pcm *pcm = rtd->pcm;
+       int ret = 0, stream;
+
+       for (stream = 0; stream < 2; stream++) {
+               substream = pcm->streams[stream].substream;
+
+               ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
+               if (ret)
+                       goto err;
+       }
+
+       return 0;
+
+err:
+       mmp_pcm_free_dma_buffers(pcm);
+       return ret;
+}
+
+struct snd_soc_platform_driver mmp_soc_platform = {
+       .ops            = &mmp_pcm_ops,
+       .pcm_new        = mmp_pcm_new,
+       .pcm_free       = mmp_pcm_free_dma_buffers,
+};
+
+static __devinit int mmp_pcm_probe(struct platform_device *pdev)
+{
+       struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
+
+       if (pdata) {
+               mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
+                                               pdata->buffer_max_playback;
+               mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
+                                               pdata->period_max_playback;
+               mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
+                                               pdata->buffer_max_capture;
+               mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
+                                               pdata->period_max_capture;
+       }
+       return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform);
+}
+
+static int __devexit mmp_pcm_remove(struct platform_device *pdev)
+{
+       snd_soc_unregister_platform(&pdev->dev);
+       return 0;
+}
+
+static struct platform_driver mmp_pcm_driver = {
+       .driver = {
+               .name = "mmp-pcm-audio",
+               .owner = THIS_MODULE,
+       },
+
+       .probe = mmp_pcm_probe,
+       .remove = __devexit_p(mmp_pcm_remove),
+};
+
+module_platform_driver(mmp_pcm_driver);
+
+MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
+MODULE_DESCRIPTION("MMP Soc Audio DMA module");
+MODULE_LICENSE("GPL");