--- /dev/null
+/*
+ * Greybus audio driver
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ *
+ * Released under the GPLv2 only.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+#include <sound/msm-dynamic-dailink.h>
+
+#include "audio_codec.h"
+#include "audio_apbridgea.h"
+#include "audio_manager.h"
+
+static DEFINE_MUTEX(gb_codec_list_lock);
+static LIST_HEAD(gb_codec_list);
+
+/*
+ * gb_snd management functions
+ */
+
+static int gbaudio_codec_request_handler(struct gb_operation *op)
+{
+ struct gb_connection *connection = op->connection;
+ struct gb_audio_streaming_event_request *req = op->request->payload;
+
+ dev_warn(&connection->bundle->dev,
+ "Audio Event received: cport: %u, event: %u\n",
+ req->data_cport, req->event);
+
+ return 0;
+}
+
+static int gbaudio_data_connection_request_handler(struct gb_operation *op)
+{
+ struct gb_connection *connection = op->connection;
+
+ dev_warn(&connection->bundle->dev, "Audio Event received\n");
+
+ return 0;
+}
+
+static int gb_audio_add_mgmt_connection(struct gbaudio_module_info *gbmodule,
+ struct greybus_descriptor_cport *cport_desc,
+ struct gb_bundle *bundle)
+{
+ struct gb_connection *connection;
+
+ /* Management Cport */
+ if (gbmodule->mgmt_connection) {
+ dev_err(&bundle->dev,
+ "Can't have multiple Management connections\n");
+ return -ENODEV;
+ }
+
+ connection = gb_connection_create(bundle, le16_to_cpu(cport_desc->id),
+ gbaudio_codec_request_handler);
+ if (IS_ERR(connection))
+ return PTR_ERR(connection);
+
+ connection->private = gbmodule;
+ gbmodule->mgmt_connection = connection;
+
+ return 0;
+}
+
+static int gb_audio_add_data_connection(struct gbaudio_module_info *gbmodule,
+ struct greybus_descriptor_cport *cport_desc,
+ struct gb_bundle *bundle)
+{
+ struct gb_connection *connection;
+ struct gbaudio_data_connection *dai;
+
+ dai = devm_kzalloc(gbmodule->dev, sizeof(*dai), GFP_KERNEL);
+ if (!dai) {
+ dev_err(gbmodule->dev, "DAI Malloc failure\n");
+ return -ENOMEM;
+ }
+
+ connection = gb_connection_create_flags(bundle,
+ le16_to_cpu(cport_desc->id),
+ gbaudio_data_connection_request_handler,
+ GB_CONNECTION_FLAG_CSD);
+ if (IS_ERR(connection)) {
+ devm_kfree(gbmodule->dev, dai);
+ return PTR_ERR(connection);
+ }
+
+ connection->private = gbmodule;
+ /* dai->name should be same as codec->dai_name */
+ strlcpy(dai->name, "greybus-apb1", NAME_SIZE);
+ dai->data_cport = connection->intf_cport_id;
+ dai->connection = connection;
+ list_add(&dai->list, &gbmodule->data_list);
+
+ return 0;
+}
+
+/*
+ * This is the basic hook get things initialized and registered w/ gb
+ */
+
+static int gb_audio_probe(struct gb_bundle *bundle,
+ const struct greybus_bundle_id *id)
+{
+ struct device *dev = &bundle->dev;
+ struct gbaudio_module_info *gbmodule;
+ struct greybus_descriptor_cport *cport_desc;
+ struct gb_audio_manager_module_descriptor desc;
+ struct gbaudio_data_connection *dai, *_dai;
+ int ret, i;
+ struct gb_audio_topology *topology;
+
+
+ /* There should be at least one Management and one Data cport */
+ if (bundle->num_cports < 2)
+ return -ENODEV;
+
+ mutex_lock(&gb_codec_list_lock);
+ /*
+ * There can be only one Management connection and any number of data
+ * connections.
+ */
+ gbmodule = devm_kzalloc(dev, sizeof(*gbmodule), GFP_KERNEL);
+ if (!gbmodule) {
+ mutex_unlock(&gb_codec_list_lock);
+ return -ENOMEM;
+ }
+
+ gbmodule->num_data_connections = bundle->num_cports - 1;
+ mutex_init(&gbmodule->lock);
+ INIT_LIST_HEAD(&gbmodule->data_list);
+ INIT_LIST_HEAD(&gbmodule->widget_list);
+ INIT_LIST_HEAD(&gbmodule->ctl_list);
+ INIT_LIST_HEAD(&gbmodule->widget_ctl_list);
+ gbmodule->dev = dev;
+ snprintf(gbmodule->name, NAME_SIZE, "%s.%s", dev->driver->name,
+ dev_name(dev));
+ greybus_set_drvdata(bundle, gbmodule);
+
+ /* Create all connections */
+ for (i = 0; i < bundle->num_cports; i++) {
+ cport_desc = &bundle->cport_desc[i];
+
+ switch (cport_desc->protocol_id) {
+ case GREYBUS_PROTOCOL_AUDIO_MGMT:
+ ret = gb_audio_add_mgmt_connection(gbmodule, cport_desc,
+ bundle);
+ if (ret)
+ goto destroy_connections;
+ break;
+ case GREYBUS_PROTOCOL_AUDIO_DATA:
+ ret = gb_audio_add_data_connection(gbmodule, cport_desc,
+ bundle);
+ if (ret)
+ goto destroy_connections;
+ break;
+ default:
+ dev_err(dev, "Unsupported protocol: 0x%02x\n",
+ cport_desc->protocol_id);
+ ret = -ENODEV;
+ goto destroy_connections;
+ }
+ }
+
+ /* There must be a management cport */
+ if (!gbmodule->mgmt_connection) {
+ ret = -EINVAL;
+ dev_err(dev, "Missing management connection\n");
+ goto destroy_connections;
+ }
+
+ /* Initialize management connection */
+ ret = gb_connection_enable(gbmodule->mgmt_connection);
+ if (ret) {
+ dev_err(dev, "%d: Error while enabling mgmt connection\n", ret);
+ goto destroy_connections;
+ }
+ gbmodule->dev_id = gbmodule->mgmt_connection->intf->interface_id;
+
+ /*
+ * FIXME: malloc for topology happens via audio_gb driver
+ * should be done within codec driver itself
+ */
+ ret = gb_audio_gb_get_topology(gbmodule->mgmt_connection, &topology);
+ if (ret) {
+ dev_err(dev, "%d:Error while fetching topology\n", ret);
+ goto disable_connection;
+ }
+
+ /* process topology data */
+ ret = gbaudio_tplg_parse_data(gbmodule, topology);
+ if (ret) {
+ dev_err(dev, "%d:Error while parsing topology data\n",
+ ret);
+ goto free_topology;
+ }
+ gbmodule->topology = topology;
+
+ /* register module with gbcodec */
+ ret = gbaudio_register_module(gbmodule);
+ if (ret)
+ goto release_topology;
+
+ /* Initialize data connections */
+ list_for_each_entry(dai, &gbmodule->data_list, list) {
+ ret = gb_connection_enable(dai->connection);
+ if (ret)
+ goto disable_data_connection;
+ }
+ gbmodule->is_connected = 1;
+
+ /* inform above layer for uevent */
+ dev_dbg(dev, "Inform set_event:%d to above layer\n", 1);
+ /* prepare for the audio manager */
+ strlcpy(desc.name, gbmodule->name, GB_AUDIO_MANAGER_MODULE_NAME_LEN);
+ desc.slot = 1; /* todo */
+ desc.vid = 2; /* todo */
+ desc.pid = 3; /* todo */
+ desc.cport = gbmodule->dev_id;
+ desc.devices = 0x2; /* todo */
+ gbmodule->manager_id = gb_audio_manager_add(&desc);
+
+ dev_dbg(dev, "Add GB Audio device:%s\n", gbmodule->name);
+ mutex_unlock(&gb_codec_list_lock);
+
+ return 0;
+
+disable_data_connection:
+ list_for_each_entry_safe(dai, _dai, &gbmodule->data_list, list)
+ gb_connection_disable(dai->connection);
+ gbaudio_unregister_module(gbmodule);
+
+release_topology:
+ gbaudio_tplg_release(gbmodule);
+ gbmodule->topology = NULL;
+
+free_topology:
+ kfree(topology);
+
+disable_connection:
+ gb_connection_disable(gbmodule->mgmt_connection);
+
+destroy_connections:
+ list_for_each_entry_safe(dai, _dai, &gbmodule->data_list, list) {
+ gb_connection_destroy(dai->connection);
+ list_del(&dai->list);
+ devm_kfree(dev, dai);
+ }
+
+ if (gbmodule->mgmt_connection)
+ gb_connection_destroy(gbmodule->mgmt_connection);
+
+ devm_kfree(dev, gbmodule);
+ mutex_unlock(&gb_codec_list_lock);
+
+ return ret;
+}
+
+static void gb_audio_disconnect(struct gb_bundle *bundle)
+{
+ struct gbaudio_module_info *gbmodule = greybus_get_drvdata(bundle);
+ struct gbaudio_data_connection *dai, *_dai;
+
+ mutex_lock(&gb_codec_list_lock);
+
+ gbaudio_unregister_module(gbmodule);
+
+ /* inform uevent to above layers */
+ gb_audio_manager_remove(gbmodule->manager_id);
+
+ gbaudio_tplg_release(gbmodule);
+ gbmodule->topology = NULL;
+ kfree(gbmodule->topology);
+ gb_connection_disable(gbmodule->mgmt_connection);
+ list_for_each_entry_safe(dai, _dai, &gbmodule->data_list, list) {
+ gb_connection_disable(dai->connection);
+ gb_connection_destroy(dai->connection);
+ list_del(&dai->list);
+ devm_kfree(gbmodule->dev, dai);
+ }
+ gb_connection_destroy(gbmodule->mgmt_connection);
+ gbmodule->mgmt_connection = NULL;
+
+ devm_kfree(&bundle->dev, gbmodule);
+ mutex_unlock(&gb_codec_list_lock);
+}
+
+static const struct greybus_bundle_id gb_audio_id_table[] = {
+ { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_AUDIO) },
+ { }
+};
+MODULE_DEVICE_TABLE(greybus, gb_audio_id_table);
+
+static struct greybus_driver gb_audio_driver = {
+ .name = "gb-audio",
+ .probe = gb_audio_probe,
+ .disconnect = gb_audio_disconnect,
+ .id_table = gb_audio_id_table,
+};
+module_greybus_driver(gb_audio_driver);
+
+MODULE_DESCRIPTION("Greybus Audio module driver");
+MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:gbaudio-module");
projects / linux-beck.git / commitdiff