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-rw-r--r--sound/soc/fsl/soc-of-simple.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/sound/soc/fsl/soc-of-simple.c b/sound/soc/fsl/soc-of-simple.c
new file mode 100644
index 0000000..0382fda
--- /dev/null
+++ b/sound/soc/fsl/soc-of-simple.c
@@ -0,0 +1,171 @@
+/*
+ * OF helpers for ALSA SoC Layer
+ *
+ * Copyright (C) 2008, Secret Lab Technologies Ltd.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-of-simple.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ALSA SoC OpenFirmware bindings");
+
+static DEFINE_MUTEX(of_snd_soc_mutex);
+static LIST_HEAD(of_snd_soc_device_list);
+static int of_snd_soc_next_index;
+
+struct of_snd_soc_device {
+ int id;
+ struct list_head list;
+ struct snd_soc_device device;
+ struct snd_soc_machine machine;
+ struct snd_soc_dai_link dai_link;
+ struct platform_device *pdev;
+ struct device_node *platform_node;
+ struct device_node *codec_node;
+};
+
+static struct snd_soc_ops of_snd_soc_ops = {
+};
+
+static struct of_snd_soc_device *
+of_snd_soc_get_device(struct device_node *codec_node)
+{
+ struct of_snd_soc_device *of_soc;
+
+ list_for_each_entry(of_soc, &of_snd_soc_device_list, list) {
+ if (of_soc->codec_node == codec_node)
+ return of_soc;
+ }
+
+ of_soc = kzalloc(sizeof(struct of_snd_soc_device), GFP_KERNEL);
+ if (!of_soc)
+ return NULL;
+
+ /* Initialize the structure and add it to the global list */
+ of_soc->codec_node = codec_node;
+ of_soc->id = of_snd_soc_next_index++;
+ of_soc->machine.dai_link = &of_soc->dai_link;
+ of_soc->machine.num_links = 1;
+ of_soc->device.machine = &of_soc->machine;
+ of_soc->dai_link.ops = &of_snd_soc_ops;
+ list_add(&of_soc->list, &of_snd_soc_device_list);
+
+ return of_soc;
+}
+
+static void of_snd_soc_register_device(struct of_snd_soc_device *of_soc)
+{
+ struct platform_device *pdev;
+ int rc;
+
+ /* Only register the device if both the codec and platform have
+ * been registered */
+ if ((!of_soc->device.codec_data) || (!of_soc->platform_node))
+ return;
+
+ pr_info("platform<-->codec match achieved; registering machine\n");
+
+ pdev = platform_device_alloc("soc-audio", of_soc->id);
+ if (!pdev) {
+ pr_err("of_soc: platform_device_alloc() failed\n");
+ return;
+ }
+
+ pdev->dev.platform_data = of_soc;
+ platform_set_drvdata(pdev, &of_soc->device);
+ of_soc->device.dev = &pdev->dev;
+
+ /* The ASoC device is complete; register it */
+ rc = platform_device_add(pdev);
+ if (rc) {
+ pr_err("of_soc: platform_device_add() failed\n");
+ return;
+ }
+
+}
+
+int of_snd_soc_register_codec(struct snd_soc_codec_device *codec_dev,
+ void *codec_data, struct snd_soc_dai *dai,
+ struct device_node *node)
+{
+ struct of_snd_soc_device *of_soc;
+ int rc = 0;
+
+ pr_info("registering ASoC codec driver: %s\n", node->full_name);
+
+ mutex_lock(&of_snd_soc_mutex);
+ of_soc = of_snd_soc_get_device(node);
+ if (!of_soc) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* Store the codec data */
+ of_soc->device.codec_data = codec_data;
+ of_soc->device.codec_dev = codec_dev;
+ of_soc->dai_link.name = (char *)node->name;
+ of_soc->dai_link.stream_name = (char *)node->name;
+ of_soc->dai_link.codec_dai = dai;
+
+ /* Now try to register the SoC device */
+ of_snd_soc_register_device(of_soc);
+
+ out:
+ mutex_unlock(&of_snd_soc_mutex);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(of_snd_soc_register_codec);
+
+int of_snd_soc_register_platform(struct snd_soc_platform *platform,
+ struct device_node *node,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct of_snd_soc_device *of_soc;
+ struct device_node *codec_node;
+ const phandle *handle;
+ int len, rc = 0;
+
+ pr_info("registering ASoC platform driver: %s\n", node->full_name);
+
+ handle = of_get_property(node, "codec-handle", &len);
+ if (!handle || len < sizeof(handle))
+ return -ENODEV;
+ codec_node = of_find_node_by_phandle(*handle);
+ if (!codec_node)
+ return -ENODEV;
+ pr_info("looking for codec: %s\n", codec_node->full_name);
+
+ mutex_lock(&of_snd_soc_mutex);
+ of_soc = of_snd_soc_get_device(codec_node);
+ if (!of_soc) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ of_soc->platform_node = node;
+ of_soc->dai_link.cpu_dai = cpu_dai;
+ of_soc->device.platform = platform;
+ of_soc->machine.name = of_soc->dai_link.cpu_dai->name;
+
+ /* Now try to register the SoC device */
+ of_snd_soc_register_device(of_soc);
+
+ out:
+ mutex_unlock(&of_snd_soc_mutex);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(of_snd_soc_register_platform);
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