1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/staging/greybus/audio_manager_sysfs.c b/drivers/staging/greybus/audio_manager_sysfs.c
new file mode 100644
index 000000000000..d8bf8591ff9e
--- /dev/null
+++ b/drivers/staging/greybus/audio_manager_sysfs.c
@@ -0,0 +1,102 @@
+/*
+ * Greybus operations
+ *
+ * Copyright 2015-2016 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/string.h>
+#include <linux/sysfs.h>
+
+#include "audio_manager.h"
+#include "audio_manager_private.h"
+
+static ssize_t manager_sysfs_add_store(
+	struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	struct gb_audio_manager_module_descriptor desc = { {0} };
+
+	int num = sscanf(buf,
+			"name=%" GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "s "
+			"slot=%d vid=%d pid=%d cport=%d i/p devices=0x%X"
+			"o/p devices=0x%X",
+			desc.name, &desc.slot, &desc.vid, &desc.pid,
+			&desc.cport, &desc.ip_devices, &desc.op_devices);
+
+	if (num != 7)
+		return -EINVAL;
+
+	num = gb_audio_manager_add(&desc);
+	if (num < 0)
+		return -EINVAL;
+
+	return count;
+}
+
+static struct kobj_attribute manager_add_attribute =
+	__ATTR(add, 0664, NULL, manager_sysfs_add_store);
+
+static ssize_t manager_sysfs_remove_store(
+	struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	int id;
+
+	int num = sscanf(buf, "%d", &id);
+
+	if (num != 1)
+		return -EINVAL;
+
+	num = gb_audio_manager_remove(id);
+	if (num)
+		return num;
+
+	return count;
+}
+
+static struct kobj_attribute manager_remove_attribute =
+	__ATTR(remove, 0664, NULL, manager_sysfs_remove_store);
+
+static ssize_t manager_sysfs_dump_store(
+	struct kobject *kobj, struct kobj_attribute *attr,
+	const char *buf, size_t count)
+{
+	int id;
+
+	int num = sscanf(buf, "%d", &id);
+
+	if (num == 1) {
+		num = gb_audio_manager_dump_module(id);
+		if (num)
+			return num;
+	} else if (!strncmp("all", buf, 3))
+		gb_audio_manager_dump_all();
+	else
+		return -EINVAL;
+
+	return count;
+}
+
+static struct kobj_attribute manager_dump_attribute =
+	__ATTR(dump, 0664, NULL, manager_sysfs_dump_store);
+
+static void manager_sysfs_init_attribute(
+		struct kobject *kobj, struct kobj_attribute *kattr)
+{
+	int err;
+
+	err = sysfs_create_file(kobj, &kattr->attr);
+	if (err) {
+		pr_warn("creating the sysfs entry for %s failed: %d\n",
+			kattr->attr.name, err);
+	}
+}
+
+void gb_audio_manager_sysfs_init(struct kobject *kobj)
+{
+	manager_sysfs_init_attribute(kobj, &manager_add_attribute);
+	manager_sysfs_init_attribute(kobj, &manager_remove_attribute);
+	manager_sysfs_init_attribute(kobj, &manager_dump_attribute);
+}