1 files changed, 543 insertions, 0 deletions

diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c
new file mode 100644
index 00000000..047a5db6
--- /dev/null
+++ b/sound/soc/imx/imx-pcm-dma-mx2.c
@@ -0,0 +1,543 @@
+/*
+ * imx-pcm-dma-mx2.c  --  ALSA Soc Audio Layer
+ *
+ * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * This code is based on code copyrighted by Freescale,
+ * Liam Girdwood, Javier Martin and probably others.
+ *
+ *  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/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/delay.h>
+#include <linux/mxc_asrc.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <mach/dma.h>
+
+#include "imx-ssi.h"
+#include "imx-pcm.h"
+
+struct asrc_p2p_ops *asrc_pcm_p2p_ops;
+
+void asrc_p2p_hook(struct asrc_p2p_ops *asrc_p2p_ct)
+{
+	asrc_pcm_p2p_ops = asrc_p2p_ct;
+	return ;
+}
+EXPORT_SYMBOL(asrc_p2p_hook);
+
+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;
+
+        return true;
+}
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_IMX_HAVE_PLATFORM_IMX_ASRC)
+static bool asrc_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->asrc_dma_data;
+	return true;
+}
+static bool asrc_p2p_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->asrc_p2p_dma_data;
+    return true;
+}
+static int imx_ssi_asrc_dma_alloc(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	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;
+	struct dma_slave_config slave_config;
+
+	dma_cap_mask_t mask;
+	enum dma_slave_buswidth buswidth;
+	int ret;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	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:
+		goto error;
+	}
+
+	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+	/*config m2p dma channel*/
+	iprtd->asrc_dma_data.peripheral_type = IMX_DMATYPE_ASRC;
+	iprtd->asrc_dma_data.priority = DMA_PRIO_HIGH;
+	iprtd->asrc_dma_data.dma_request =
+			iprtd->asrc_pcm_p2p_ops_ko->
+				asrc_p2p_get_dma_request(iprtd->asrc_index, 1);
+	iprtd->asrc_dma_chan = dma_request_channel(mask, asrc_filter, iprtd);
+
+	if (!iprtd->asrc_dma_chan)
+		goto error;
+
+	slave_config.direction = DMA_TO_DEVICE;
+	slave_config.dst_addr = iprtd->asrc_pcm_p2p_ops_ko->
+					asrc_p2p_per_addr(iprtd->asrc_index, 1);
+	slave_config.dst_addr_width = buswidth;
+	slave_config.dst_maxburst = dma_params->burstsize * buswidth;
+
+	ret = dmaengine_slave_config(iprtd->asrc_dma_chan, &slave_config);
+	if (ret)
+		goto error;
+	/*config p2p dma channel*/
+	iprtd->asrc_p2p_dma_data.peripheral_type = IMX_DMATYPE_ASRC;
+	iprtd->asrc_p2p_dma_data.priority = DMA_PRIO_HIGH;
+	iprtd->asrc_p2p_dma_data.dma_request =
+			iprtd->asrc_pcm_p2p_ops_ko->
+				asrc_p2p_get_dma_request(iprtd->asrc_index, 0);
+	iprtd->asrc_p2p_dma_data.dma_request_p2p = dma_params->dma;
+	iprtd->asrc_p2p_dma_chan =
+		dma_request_channel(mask, asrc_p2p_filter, iprtd);
+	if (!iprtd->asrc_p2p_dma_chan)
+		goto error;
+
+	switch (iprtd->p2p->p2p_width) {
+	case ASRC_WIDTH_16_BIT:
+		buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+		break;
+	case ASRC_WIDTH_24_BIT:
+		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	slave_config.direction = DMA_DEV_TO_DEV;
+	slave_config.src_addr = iprtd->asrc_pcm_p2p_ops_ko->
+					asrc_p2p_per_addr(iprtd->asrc_index, 0);
+	slave_config.src_addr_width = buswidth;
+	slave_config.src_maxburst = dma_params->burstsize * buswidth;
+	slave_config.dst_addr = dma_params->dma_addr;
+	slave_config.dst_addr_width = buswidth;
+	slave_config.dst_maxburst = dma_params->burstsize * buswidth;
+
+	ret = dmaengine_slave_config(iprtd->asrc_p2p_dma_chan, &slave_config);
+	if (ret)
+		goto error;
+
+	return 0;
+error:
+	if (iprtd->asrc_dma_chan) {
+		dma_release_channel(iprtd->asrc_dma_chan);
+		iprtd->asrc_dma_chan = NULL;
+	}
+	if (iprtd->asrc_p2p_dma_chan) {
+		dma_release_channel(iprtd->asrc_p2p_dma_chan);
+		iprtd->asrc_p2p_dma_chan = NULL;
+	}
+	return -EINVAL;
+}
+#endif
+
+static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	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;
+	struct dma_slave_config slave_config;
+	dma_cap_mask_t mask;
+	enum dma_slave_buswidth buswidth;
+	int ret;
+
+	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	iprtd->dma_data.peripheral_type = dma_params->peripheral_type;
+	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;
+
+	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;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		slave_config.direction = DMA_TO_DEVICE;
+		slave_config.dst_addr = dma_params->dma_addr;
+		slave_config.dst_addr_width = buswidth;
+		slave_config.dst_maxburst = dma_params->burstsize * buswidth;
+	} else {
+		slave_config.direction = DMA_FROM_DEVICE;
+		slave_config.src_addr = dma_params->dma_addr;
+		slave_config.src_addr_width = buswidth;
+		slave_config.src_maxburst = dma_params->burstsize * buswidth;
+	}
+
+	ret = dmaengine_slave_config(iprtd->dma_chan, &slave_config);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+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;
+	unsigned long dma_addr;
+	struct dma_chan *chan;
+	struct imx_pcm_dma_params *dma_params;
+	int ret;
+
+	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	if (iprtd->asrc_enable) {
+		ret = imx_ssi_asrc_dma_alloc(substream, params);
+		if (ret)
+			return ret;
+		chan = iprtd->asrc_p2p_dma_chan;
+		iprtd->asrc_p2p_desc =
+			chan->device->device_prep_dma_cyclic(chan, 0xffff,
+							64,
+							64,
+							DMA_DEV_TO_DEV);
+		if (!iprtd->asrc_p2p_desc) {
+			dev_err(&chan->dev->device,
+					"cannot prepare slave dma\n");
+			return -EINVAL;
+		}
+		chan = iprtd->asrc_dma_chan;
+	} else {
+		ret = imx_ssi_dma_alloc(substream, params);
+		if (ret)
+			return ret;
+		chan = iprtd->dma_chan;
+	}
+
+	iprtd->size = params_buffer_bytes(params);
+	iprtd->periods = params_periods(params);
+	iprtd->period_bytes = params_period_bytes(params);
+	iprtd->offset = 0;
+	iprtd->period_time = HZ / (params_rate(params) /
+					params_period_size(params));
+
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+	dma_addr = runtime->dma_addr;
+
+	iprtd->buf = (unsigned int *)substream->dma_buffer.area;
+
+	if (iprtd->asrc_enable) {
+		iprtd->asrc_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_TO_DEVICE : DMA_FROM_DEVICE);
+		if (!iprtd->asrc_desc) {
+			dev_err(&chan->dev->device,
+					"cannot prepare slave dma\n");
+			return -EINVAL;
+		}
+
+		iprtd->asrc_desc->callback = audio_dma_irq;
+		iprtd->asrc_desc->callback_param = substream;
+	} else {
+		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_TO_DEVICE : DMA_FROM_DEVICE);
+		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_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct imx_pcm_runtime_data *iprtd = runtime->private_data;
+
+	if (iprtd->asrc_enable) {
+		if (iprtd->asrc_dma_chan) {
+			dma_release_channel(iprtd->asrc_dma_chan);
+			iprtd->asrc_dma_chan = NULL;
+		}
+		if (iprtd->asrc_p2p_dma_chan) {
+			dma_release_channel(iprtd->asrc_p2p_dma_chan);
+			iprtd->asrc_p2p_dma_chan = NULL;
+		}
+		iprtd->dma_chan = NULL;
+	} else {
+		if (iprtd->dma_chan) {
+			dma_release_channel(iprtd->dma_chan);
+			iprtd->dma_chan = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct imx_pcm_dma_params *dma_params;
+
+	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, 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:
+		if (iprtd->asrc_enable) {
+			dmaengine_submit(iprtd->asrc_p2p_desc);
+			dmaengine_submit(iprtd->asrc_desc);
+			iprtd->asrc_pcm_p2p_ops_ko->
+					asrc_p2p_start_conv(iprtd->asrc_index);
+			mdelay(1);
+		} else {
+			dmaengine_submit(iprtd->desc);
+		}
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (iprtd->asrc_enable) {
+			dmaengine_terminate_all(iprtd->asrc_dma_chan);
+			dmaengine_terminate_all(iprtd->asrc_p2p_dma_chan);
+			iprtd->asrc_pcm_p2p_ops_ko->
+					asrc_p2p_stop_conv(iprtd->asrc_index);
+		} else {
+			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 |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_PAUSE |
+		SNDRV_PCM_INFO_RESUME,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rate_min = 8000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE,
+	.period_bytes_min = 128,
+	.period_bytes_max = 65535, /* Limited by SDMA engine */
+	.periods_min = 2,
+	.periods_max = 255,
+	.fifo_size = 0,
+};
+
+static int snd_imx_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct imx_pcm_runtime_data *iprtd;
+	int ret;
+
+	iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
+	if (iprtd == NULL)
+		return -ENOMEM;
+	if (!strcmp(rtd->dai_link->name, "HiFi_ASRC")) {
+		iprtd->asrc_enable = true;
+		iprtd->p2p =
+			(struct asrc_p2p_params *)snd_soc_pcm_get_drvdata(rtd);
+		iprtd->asrc_index = -1;
+		if (!asrc_pcm_p2p_ops) {
+			pr_err("ASRC is not loaded!\n");
+			return -EINVAL;
+		}
+		iprtd->asrc_pcm_p2p_ops_ko = asrc_pcm_p2p_ops;
+	}
+
+	runtime->private_data = iprtd;
+
+	ret = snd_pcm_hw_constraint_integer(substream->runtime,
+			SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		kfree(iprtd);
+		return ret;
+	}
+
+	if (!strncmp(rtd->cpu_dai->name, "imx-ssi", strlen("imx-ssi")))
+		snd_imx_hardware.buffer_bytes_max = IMX_SSI_DMABUF_SIZE;
+	else if (!strncmp(rtd->cpu_dai->name, "imx-esai", strlen("imx-esai")))
+		snd_imx_hardware.buffer_bytes_max = IMX_ESAI_DMABUF_SIZE;
+	else if (!strncmp(rtd->cpu_dai->name, "imx-spdif", strlen("imx-spdif")))
+		snd_imx_hardware.buffer_bytes_max = IMX_SPDIF_DMABUF_SIZE;
+	else
+		snd_imx_hardware.buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE;
+
+	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
+
+	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;
+
+	kfree(iprtd);
+
+	return 0;
+}
+
+static struct snd_pcm_ops imx_pcm_ops = {
+	.open		= snd_imx_open,
+	.close		= snd_imx_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= snd_imx_pcm_hw_params,
+	.hw_free	= snd_imx_pcm_hw_free,
+	.prepare	= snd_imx_pcm_prepare,
+	.trigger	= snd_imx_pcm_trigger,
+	.pointer	= snd_imx_pcm_pointer,
+	.mmap		= snd_imx_pcm_mmap,
+};
+
+static struct snd_soc_platform_driver imx_soc_platform_mx2 = {
+	.ops		= &imx_pcm_ops,
+	.pcm_new	= imx_pcm_new,
+	.pcm_free	= imx_pcm_free,
+};
+
+static int __devinit imx_soc_platform_probe(struct platform_device *pdev)
+{
+	struct imx_ssi *ssi = platform_get_drvdata(pdev);
+
+	if (ssi->dma_params_tx.burstsize == 0
+			&& ssi->dma_params_rx.burstsize == 0) {
+		ssi->dma_params_tx.burstsize = 6;
+		ssi->dma_params_rx.burstsize = 4;
+	}
+
+	return snd_soc_register_platform(&pdev->dev, &imx_soc_platform_mx2);
+}
+
+static int __devexit imx_soc_platform_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_platform(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver imx_pcm_driver = {
+	.driver = {
+			.name = "imx-pcm-audio",
+			.owner = THIS_MODULE,
+	},
+	.probe = imx_soc_platform_probe,
+	.remove = __devexit_p(imx_soc_platform_remove),
+};
+
+static int __init snd_imx_pcm_init(void)
+{
+	return platform_driver_register(&imx_pcm_driver);
+}
+module_init(snd_imx_pcm_init);
+
+static void __exit snd_imx_pcm_exit(void)
+{
+	platform_driver_unregister(&imx_pcm_driver);
+}
+module_exit(snd_imx_pcm_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-pcm-audio");