[alsa-devel] [PATCH 3/6] ASoC: sti: Add uniperipheral dai driver
Arnaud Pouliquen
arnaud.pouliquen at st.com
Thu Jul 16 11:36:04 CEST 2015
ASoc uniperipheral dai driver that manages uniperipheral DAIs and registers
associated generic dma engine platform.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
---
sound/soc/sti/sti_uniperif.c | 253 +++++++++++++++++++++++++++++++++++++++++++
sound/soc/sti/uniperif.h | 9 ++
2 files changed, 262 insertions(+)
create mode 100644 sound/soc/sti/sti_uniperif.c
diff --git a/sound/soc/sti/sti_uniperif.c b/sound/soc/sti/sti_uniperif.c
new file mode 100644
index 0000000..749e6b2
--- /dev/null
+++ b/sound/soc/sti/sti_uniperif.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen at st.com>
+ * for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/module.h>
+
+#include "uniperif.h"
+
+/*
+ * sti_uniperiph_dai_create_ctrl
+ * This function is used to create Ctrl associated to DAI but also pcm device.
+ * Request is done by front end to associate ctrl with pcm device id
+ */
+int sti_uniperiph_dai_create_ctrl(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ struct snd_kcontrol_new *ctrl;
+ int i;
+
+ if (!uni->num_ctrls)
+ return 0;
+
+ for (i = 0; i < uni->num_ctrls; i++) {
+ /*
+ * Several Control can have same name. Controls are indexed on
+ * Uniperipheral instance ID
+ */
+ ctrl = &uni->snd_ctrls[i];
+ ctrl->index = uni->info->id;
+ ctrl->device = uni->info->id;
+ }
+
+ return snd_soc_add_dai_controls(dai, uni->snd_ctrls, uni->num_ctrls);
+}
+
+/*
+ * DAI
+ */
+int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ int transfer_size;
+
+ transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
+
+ dma_data = snd_soc_dai_get_dma_data(dai, substream);
+ dma_data->maxburst = transfer_size;
+
+ return 0;
+}
+
+int sti_uniperiph_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ priv->dai_data.uni->daifmt = fmt;
+
+ return 0;
+}
+
+static int sti_uniperiph_dai_suspend(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ int ret;
+
+ /* The uniperipheral should be in stopped state */
+ if (uni->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(uni->dev, "%s: invalid uni state( %d)",
+ __func__, (int)uni->state);
+ return -EBUSY;
+ }
+
+ /* Pinctrl: switch pinstate to sleep */
+ ret = pinctrl_pm_select_sleep_state(uni->dev);
+ if (ret)
+ dev_err(uni->dev, "%s: failed to select pinctrl state",
+ __func__);
+
+ return ret;
+}
+
+static int sti_uniperiph_dai_resume(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ int ret;
+
+ if (of_device_is_compatible(dai->dev->of_node, "st,sti-uni-player")) {
+ ret = uni_player_resume(uni);
+ if (ret)
+ return ret;
+ }
+
+ /* pinctrl: switch pinstate to default */
+ ret = pinctrl_pm_select_default_state(uni->dev);
+ if (ret)
+ dev_err(uni->dev, "%s: failed to select pinctrl state",
+ __func__);
+
+ return ret;
+}
+
+static int sti_uniperiph_dai_probe(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct sti_uniperiph_dai *dai_data = &priv->dai_data;
+
+ /* DMA settings*/
+ if (of_device_is_compatible(dai->dev->of_node, "st,sti-uni-player"))
+ snd_soc_dai_init_dma_data(dai, &dai_data->dma_data, NULL);
+ else
+ snd_soc_dai_init_dma_data(dai, NULL, &dai_data->dma_data);
+
+ dai_data->dma_data.addr = dai_data->uni->fifo_phys_address;
+ dai_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+ return sti_uniperiph_dai_create_ctrl(dai);
+}
+
+static const struct snd_soc_dai_driver sti_uniperiph_dai_template = {
+ .probe = sti_uniperiph_dai_probe,
+ .suspend = sti_uniperiph_dai_suspend,
+ .resume = sti_uniperiph_dai_resume
+};
+
+static const struct snd_soc_component_driver sti_uniperiph_dai_component = {
+ .name = "sti_cpu_dai",
+};
+
+static int sti_uniperiph_cpu_dai_of(struct device_node *node,
+ struct sti_uniperiph_data *priv)
+{
+ const char *str;
+ int ret;
+ struct device *dev = &priv->pdev->dev;
+ struct sti_uniperiph_dai *dai_data = &priv->dai_data;
+ struct snd_soc_dai_driver *dai = priv->dai;
+ struct snd_soc_pcm_stream *stream;
+ struct uniperif *uni;
+
+ uni = devm_kzalloc(dev, sizeof(*uni), GFP_KERNEL);
+ if (!uni)
+ return -ENOMEM;
+
+ *dai = sti_uniperiph_dai_template;
+ ret = of_property_read_string(node, "dai-name", &str);
+ if (ret < 0) {
+ dev_err(dev, "%s: dai name missing.\n", __func__);
+ return -EINVAL;
+ }
+ dai->name = str;
+
+ /* Get resources */
+ uni->mem_region = platform_get_resource(priv->pdev, IORESOURCE_MEM, 0);
+
+ if (!uni->mem_region) {
+ dev_err(dev, "Failed to get memory resource");
+ return -ENODEV;
+ }
+
+ uni->base = devm_ioremap_resource(dev, uni->mem_region);
+
+ if (IS_ERR(uni->base))
+ return PTR_ERR(uni->base);
+
+ uni->fifo_phys_address = uni->mem_region->start +
+ UNIPERIF_FIFO_DATA_OFFSET(uni);
+
+ uni->irq = platform_get_irq(priv->pdev, 0);
+ if (!uni->irq < 0) {
+ dev_err(dev, "Failed to get IRQ resource");
+ return -ENXIO;
+ }
+
+ dai_data->uni = uni;
+
+ if (of_device_is_compatible(node, "st,sti-uni-player")) {
+ uni_player_init(priv->pdev, uni);
+ stream = &dai->playback;
+ } else {
+ uni_reader_init(priv->pdev, uni);
+ stream = &dai->capture;
+ }
+ dai->ops = uni->dai_ops;
+
+ stream->stream_name = dai->name;
+ stream->channels_min = uni->hw->channels_min;
+ stream->channels_max = uni->hw->channels_max;
+ stream->rates = uni->hw->rates;
+ stream->formats = uni->hw->formats;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config dmaengine_pcm_config = {
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+static int sti_uniperiph_probe(struct platform_device *pdev)
+{
+ struct sti_uniperiph_data *priv;
+ struct device_node *node = pdev->dev.of_node;
+ int ret;
+
+ /* Allocate the private data and the CPU_DAI array */
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dai = devm_kzalloc(&pdev->dev, sizeof(*priv->dai), GFP_KERNEL);
+ if (!priv->dai)
+ return -ENOMEM;
+
+ priv->pdev = pdev;
+
+ ret = sti_uniperiph_cpu_dai_of(node, priv);
+
+ dev_set_drvdata(&pdev->dev, priv);
+
+ ret = snd_soc_register_component(&pdev->dev,
+ &sti_uniperiph_dai_component,
+ priv->dai, 1);
+ if (ret < 0)
+ return ret;
+
+ return devm_snd_dmaengine_pcm_register(&pdev->dev,
+ &dmaengine_pcm_config, 0);
+}
+
+static const struct of_device_id snd_soc_sti_match[] = {
+ { .compatible = "st,sti-uni-player", },
+ { .compatible = "st,sti-uni-reader", },
+ {},
+};
+
+static struct platform_driver sti_uniperiph_driver = {
+ .driver = {
+ .name = "sti-uniperiph-dai",
+ .of_match_table = snd_soc_sti_match,
+ },
+ .probe = sti_uniperiph_probe,
+};
+module_platform_driver(sti_uniperiph_driver);
+
+MODULE_DESCRIPTION("uniperipheral DAI driver");
+MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen at st.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/sti/uniperif.h b/sound/soc/sti/uniperif.h
index f396958..f1e583d 100644
--- a/sound/soc/sti/uniperif.h
+++ b/sound/soc/sti/uniperif.h
@@ -1215,4 +1215,13 @@ int uni_player_resume(struct uniperif *player);
/* uniperiph reader */
int uni_reader_init(struct platform_device *pdev,
struct uniperif *uni_reader);
+
+/* common */
+int sti_uniperiph_dai_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt);
+
+int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai);
+
#endif
--
1.9.1
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