[alsa-devel] [PATCH 6/8] ASoC: Ux500: Add platform-driver
Ola Lilja
ola.o.lilja at stericsson.com
Fri Apr 20 11:33:14 CEST 2012
Add platform-driver handling all DMA-activities.
Signed-off-by: Ola Lilja <ola.o.lilja at stericsson.com>
---
sound/soc/ux500/Kconfig | 9 +-
sound/soc/ux500/Makefile | 7 +-
sound/soc/ux500/ux500_pcm.c | 332 +++++++++++++++++++++++++++++++++++++++++++
sound/soc/ux500/ux500_pcm.h | 42 ++++++
4 files changed, 387 insertions(+), 3 deletions(-)
create mode 100644 sound/soc/ux500/ux500_pcm.c
create mode 100644 sound/soc/ux500/ux500_pcm.h
diff --git a/sound/soc/ux500/Kconfig b/sound/soc/ux500/Kconfig
index be33409..59da6ce 100644
--- a/sound/soc/ux500/Kconfig
+++ b/sound/soc/ux500/Kconfig
@@ -8,9 +8,16 @@ menuconfig SND_SOC_UX500
Say Y if you want to enable ASoC-support for
any of the Ux500 platforms (e.g. U8500).
-config SND_SOC_UX500_MSP_I2S
+config SND_SOC_UX500_PLAT_MSP_I2S
tristate "Platform - MSP (I2S)"
depends on SND_SOC_UX500
help
Say Y if you want to enable the Ux500 MSP I2S-driver.
+config SND_SOC_UX500_PLAT_DMA
+ tristate "Platform - DB8500 (DMA)"
+ depends on SND_SOC_UX500
+ select SND_SOC_DMAENGINE_PCM
+ help
+ Say Y if you want to enable the Ux500 platform-driver.
+
diff --git a/sound/soc/ux500/Makefile b/sound/soc/ux500/Makefile
index 6ffef5c..2e742b1 100644
--- a/sound/soc/ux500/Makefile
+++ b/sound/soc/ux500/Makefile
@@ -1,5 +1,8 @@
# Ux500 Platform Support
-snd-soc-ux500-msp-i2s-objs := ux500_msp_dai.o ux500_msp_i2s.o
-obj-$(CONFIG_SND_SOC_UX500_MSP_I2S) += snd-soc-ux500-msp-i2s.o
+snd-soc-ux500-plat-msp-i2s-objs := ux500_msp_dai.o ux500_msp_i2s.o
+obj-$(CONFIG_SND_SOC_UX500_PLAT_MSP_I2S) += snd-soc-ux500-plat-msp-i2s.o
+
+snd-soc-ux500-plat-dma-objs := ux500_pcm.o
+obj-$(CONFIG_SND_SOC_UX500_PLAT_DMA) += snd-soc-ux500-plat-dma.o
diff --git a/sound/soc/ux500/ux500_pcm.c b/sound/soc/ux500/ux500_pcm.c
new file mode 100644
index 0000000..62bcf02
--- /dev/null
+++ b/sound/soc/ux500/ux500_pcm.c
@@ -0,0 +1,332 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2012
+ *
+ * Author: Ola Lilja <ola.o.lilja at stericsson.com>,
+ * Roger Nilsson <roger.xr.nilsson at stericsson.com>
+ * for ST-Ericsson.
+ *
+ * License terms:
+ *
+ * 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 <asm/page.h>
+
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/slab.h>
+
+#include <plat/ste_dma40.h>
+
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "ux500_msp_i2s.h"
+#include "ux500_pcm.h"
+
+static struct snd_pcm_hardware ux500_pcm_hw_playback = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_U16_LE |
+ SNDRV_PCM_FMTBIT_S16_BE |
+ SNDRV_PCM_FMTBIT_U16_BE,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .rate_min = UX500_PLATFORM_MIN_RATE_PLAYBACK,
+ .rate_max = UX500_PLATFORM_MAX_RATE_PLAYBACK,
+ .channels_min = UX500_PLATFORM_MIN_CHANNELS,
+ .channels_max = UX500_PLATFORM_MAX_CHANNELS,
+ .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
+ .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
+ .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
+ .periods_min = UX500_PLATFORM_PERIODS_MIN,
+ .periods_max = UX500_PLATFORM_PERIODS_MAX,
+};
+
+static struct snd_pcm_hardware ux500_pcm_hw_capture = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_U16_LE |
+ SNDRV_PCM_FMTBIT_S16_BE |
+ SNDRV_PCM_FMTBIT_U16_BE,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .rate_min = UX500_PLATFORM_MIN_RATE_CAPTURE,
+ .rate_max = UX500_PLATFORM_MAX_RATE_CAPTURE,
+ .channels_min = UX500_PLATFORM_MIN_CHANNELS,
+ .channels_max = UX500_PLATFORM_MAX_CHANNELS,
+ .buffer_bytes_max = UX500_PLATFORM_BUFFER_BYTES_MAX,
+ .period_bytes_min = UX500_PLATFORM_PERIODS_BYTES_MIN,
+ .period_bytes_max = UX500_PLATFORM_PERIODS_BYTES_MAX,
+ .periods_min = UX500_PLATFORM_PERIODS_MIN,
+ .periods_max = UX500_PLATFORM_PERIODS_MAX,
+};
+
+static void ux500_pcm_dma_hw_free(struct device *dev,
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dma_buffer *buf = runtime->dma_buffer_p;
+
+ if (runtime->dma_area == NULL)
+ return;
+
+ if (buf != &substream->dma_buffer) {
+ dma_free_coherent(buf->dev.dev, buf->bytes, buf->area,
+ buf->addr);
+ kfree(runtime->dma_buffer_p);
+ }
+
+ snd_pcm_set_runtime_buffer(substream, NULL);
+}
+
+static int ux500_pcm_open(struct snd_pcm_substream *substream)
+{
+ int stream_id = substream->pstr->stream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct ux500_pcm *ux500_pcm_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *dai = rtd->cpu_dai;
+ struct device *dev = dai->dev;
+ int ret;
+ struct ux500_msp_dma_params *dma_params;
+ u16 per_data_width, mem_data_width;
+ struct stedma40_chan_cfg *dma_cfg;
+
+ dev_dbg(dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
+ snd_soc_stream_str(substream));
+
+ dev_dbg(dev, "%s: Set runtime hwparams.\n", __func__);
+ if (stream_id == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_set_runtime_hwparams(substream,
+ &ux500_pcm_hw_playback);
+ else
+ snd_soc_set_runtime_hwparams(substream,
+ &ux500_pcm_hw_capture);
+
+ /* ensure that buffer size is a multiple of period size */
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(dev, "%s: Error: snd_pcm_hw_constraints failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ dev_dbg(dev, "%s: Init runtime private data.\n", __func__);
+ ux500_pcm_data = kzalloc(sizeof(struct ux500_pcm), GFP_KERNEL);
+ if (ux500_pcm_data == NULL)
+ return -ENOMEM;
+ ux500_pcm_data->msp_id = dai->id;
+
+ runtime->private_data = ux500_pcm_data;
+
+ dev_dbg(dev, "%s: Set hw-struct for %s.\n", __func__,
+ snd_soc_stream_str(substream));
+ runtime->hw = (stream_id == SNDRV_PCM_STREAM_PLAYBACK) ?
+ ux500_pcm_hw_playback : ux500_pcm_hw_capture;
+
+ mem_data_width = STEDMA40_HALFWORD_WIDTH;
+
+ dma_params = snd_soc_dai_get_dma_data(dai, substream);
+ switch (dma_params->data_size) {
+ case 32:
+ per_data_width = STEDMA40_WORD_WIDTH;
+ break;
+ case 16:
+ per_data_width = STEDMA40_HALFWORD_WIDTH;
+ break;
+ case 8:
+ per_data_width = STEDMA40_BYTE_WIDTH;
+ break;
+ default:
+ per_data_width = STEDMA40_WORD_WIDTH;
+ dev_warn(rtd->platform->dev,
+ "%s: Unknown data-size (%d)! Assuming 32 bits.\n",
+ __func__, dma_params->data_size);
+ }
+
+ dma_cfg = dma_params->dma_cfg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_cfg->src_info.data_width = mem_data_width;
+ dma_cfg->dst_info.data_width = per_data_width;
+ } else {
+ dma_cfg->src_info.data_width = per_data_width;
+ dma_cfg->dst_info.data_width = mem_data_width;
+ }
+
+
+ ret = snd_dmaengine_pcm_open(substream, stedma40_filter, dma_cfg);
+ if (ret) {
+ dev_dbg(dai->dev,
+ "%s: ERROR: snd_dmaengine_pcm_open failed (%d)!\n",
+ __func__, ret);
+ return ret;
+ }
+
+ snd_dmaengine_pcm_set_data(substream, dma_cfg);
+
+ return 0;
+}
+
+static int ux500_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *dai = rtd->cpu_dai;
+ struct ux500_pcm *ux500_pcm_data = substream->runtime->private_data;
+
+ dev_dbg(dai->dev, "%s: Enter\n", __func__);
+
+ snd_dmaengine_pcm_close(substream);
+
+ kfree(ux500_pcm_data);
+
+ return 0;
+}
+
+static int ux500_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_dma_buffer *buf = runtime->dma_buffer_p;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int ret = 0;
+ int size;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
+
+ size = params_buffer_bytes(hw_params);
+
+ if (buf) {
+ if (buf->bytes >= size)
+ goto out;
+ ux500_pcm_dma_hw_free(NULL, substream);
+ }
+
+ if (substream->dma_buffer.area != NULL &&
+ substream->dma_buffer.bytes >= size) {
+ buf = &substream->dma_buffer;
+ } else {
+ buf = kmalloc(sizeof(struct snd_dma_buffer), GFP_KERNEL);
+ if (!buf)
+ goto nomem;
+
+ buf->dev.type = SNDRV_DMA_TYPE_DEV;
+ buf->dev.dev = NULL;
+ buf->area = dma_alloc_coherent(NULL, size, &buf->addr,
+ GFP_KERNEL);
+ buf->bytes = size;
+ buf->private_data = NULL;
+
+ if (!buf->area)
+ goto free;
+ }
+ snd_pcm_set_runtime_buffer(substream, buf);
+ ret = 1;
+ out:
+ runtime->dma_bytes = size;
+ return ret;
+
+ free:
+ kfree(buf);
+ nomem:
+ return -ENOMEM;
+}
+
+static int ux500_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter\n", __func__);
+
+ ux500_pcm_dma_hw_free(NULL, substream);
+
+ return 0;
+}
+
+static int ux500_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
+
+ return dma_mmap_coherent(NULL, vma, runtime->dma_area,
+ runtime->dma_addr, runtime->dma_bytes);
+}
+
+static struct snd_pcm_ops ux500_pcm_ops = {
+ .open = ux500_pcm_open,
+ .close = ux500_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = ux500_pcm_hw_params,
+ .hw_free = ux500_pcm_hw_free,
+ .trigger = snd_dmaengine_pcm_trigger,
+ .pointer = snd_dmaengine_pcm_pointer,
+ .mmap = ux500_pcm_mmap
+};
+
+int ux500_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_pcm *pcm = rtd->pcm;
+
+ dev_dbg(rtd->platform->dev, "%s: Enter.\n", __func__);
+
+ pcm->info_flags = 0;
+ strcpy(pcm->name, "UX500_PCM");
+ dev_dbg(rtd->platform->dev, "%s: PCM-name: %s\n", __func__, pcm->name);
+
+ return 0;
+}
+
+static struct snd_soc_platform_driver ux500_pcm_soc_drv = {
+ .ops = &ux500_pcm_ops,
+ .pcm_new = ux500_pcm_new,
+};
+
+static int __devexit ux500_pcm_drv_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = snd_soc_register_platform(&pdev->dev, &ux500_pcm_soc_drv);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "%s: ERROR: Failed to register platform '%s' (%d)!\n",
+ __func__, pdev->name, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit ux500_pcm_drv_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_platform(&pdev->dev);
+
+ return 0;
+}
+
+static struct platform_driver ux500_pcm_driver = {
+ .driver = {
+ .name = "ux500-pcm",
+ .owner = THIS_MODULE,
+ },
+
+ .probe = ux500_pcm_drv_probe,
+ .remove = __devexit_p(ux500_pcm_drv_remove),
+};
+module_platform_driver(ux500_pcm_driver);
+
+MODULE_LICENSE("GPLv2");
+
diff --git a/sound/soc/ux500/ux500_pcm.h b/sound/soc/ux500/ux500_pcm.h
new file mode 100644
index 0000000..19d766a
--- /dev/null
+++ b/sound/soc/ux500/ux500_pcm.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2012
+ *
+ * Author: Ola Lilja <ola.o.lilja at stericsson.com>,
+ * Roger Nilsson <roger.xr.nilsson at stericsson.com>
+ * for ST-Ericsson.
+ *
+ * License terms:
+ *
+ * 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 UX500_PCM_H
+#define UX500_PCM_H
+
+#include <asm/page.h>
+
+#include <linux/workqueue.h>
+
+#define UX500_PLATFORM_MIN_RATE_PLAYBACK 8000
+#define UX500_PLATFORM_MAX_RATE_PLAYBACK 48000
+#define UX500_PLATFORM_MIN_RATE_CAPTURE 8000
+#define UX500_PLATFORM_MAX_RATE_CAPTURE 48000
+
+#define UX500_PLATFORM_MIN_CHANNELS 1
+#define UX500_PLATFORM_MAX_CHANNELS 8
+
+#define UX500_PLATFORM_PERIODS_BYTES_MIN 128
+#define UX500_PLATFORM_PERIODS_BYTES_MAX (64 * PAGE_SIZE)
+#define UX500_PLATFORM_PERIODS_MIN 2
+#define UX500_PLATFORM_PERIODS_MAX 48
+#define UX500_PLATFORM_BUFFER_BYTES_MAX (2048 * PAGE_SIZE)
+
+extern struct snd_soc_platform ux500_soc_platform;
+
+struct ux500_pcm {
+ int msp_id;
+ int stream_id;
+};
+
+#endif
--
1.7.8.3
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