gb-audio-codec-y := audio_codec.o
gb-audio-gb-y := audio_gb.o
gb-audio-apbridgea-y := audio_apbridgea.o
+gb-audio-manager-y += audio_manager.o
+gb-audio-manager-y += audio_manager_module.o
gb-camera-y := camera.o
obj-m += greybus.o
obj-m += gb-camera.o
obj-m += gb-audio-gb.o
obj-m += gb-audio-apbridgea.o
+obj-m += gb-audio-manager.o
KERNELVER ?= $(shell uname -r)
KERNELDIR ?= /lib/modules/$(KERNELVER)/build
# needed for trace events
ccflags-y += -I$(src)
+GB_AUDIO_MANAGER_SYSFS ?= true
+ifeq ($(GB_AUDIO_MANAGER_SYSFS),true)
+gb-audio-manager-y += audio_manager_sysfs.o
+ccflags-y += -DGB_AUDIO_MANAGER_SYSFS
+endif
+
all: module
tools::
--- /dev/null
+/*
+ * Greybus operations
+ *
+ * Copyright 2015-2016 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/rwlock.h>
+
+#include "audio_manager.h"
+#include "audio_manager_private.h"
+
+static struct kset *manager_kset;
+
+static LIST_HEAD(modules_list);
+static DEFINE_RWLOCK(modules_lock);
+
+static int current_module_id;
+
+/* helpers */
+static struct gb_audio_manager_module *gb_audio_manager_get_locked(int id)
+{
+ struct gb_audio_manager_module *module;
+
+ if (id < 0)
+ return NULL;
+
+ list_for_each_entry(module, &modules_list, list) {
+ if (module->id == id)
+ return module;
+ }
+
+ return NULL;
+}
+
+/* public API */
+int gb_audio_manager_add(struct gb_audio_manager_module_descriptor *desc)
+{
+ struct gb_audio_manager_module *module;
+ unsigned long flags;
+ int err;
+
+ err = gb_audio_manager_module_create(&module, manager_kset,
+ current_module_id++, desc);
+ if (err)
+ return err;
+
+ /* Add it to the list */
+ write_lock_irqsave(&modules_lock, flags);
+ list_add_tail(&module->list, &modules_list);
+ write_unlock_irqrestore(&modules_lock, flags);
+
+ return module->id;
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_add);
+
+int gb_audio_manager_remove(int id)
+{
+ struct gb_audio_manager_module *module;
+ unsigned long flags;
+
+ write_lock_irqsave(&modules_lock, flags);
+
+ module = gb_audio_manager_get_locked(id);
+ if (!module) {
+ write_unlock_irqrestore(&modules_lock, flags);
+ return -EINVAL;
+ }
+
+ list_del(&module->list);
+ kobject_put(&module->kobj);
+ write_unlock_irqrestore(&modules_lock, flags);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_remove);
+
+void gb_audio_manager_remove_all(void)
+{
+ struct gb_audio_manager_module *module, *next;
+ int is_empty = 1;
+ unsigned long flags;
+
+ write_lock_irqsave(&modules_lock, flags);
+
+ list_for_each_entry_safe(module, next, &modules_list, list) {
+ list_del(&module->list);
+ kobject_put(&module->kobj);
+ }
+
+ is_empty = list_empty(&modules_list);
+
+ write_unlock_irqrestore(&modules_lock, flags);
+
+ if (!is_empty)
+ pr_warn("Not all nodes were deleted\n");
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_remove_all);
+
+struct gb_audio_manager_module *gb_audio_manager_get_module(int id)
+{
+ struct gb_audio_manager_module *module;
+ unsigned long flags;
+
+ read_lock_irqsave(&modules_lock, flags);
+ module = gb_audio_manager_get_locked(id);
+ kobject_get(&module->kobj);
+ read_unlock_irqrestore(&modules_lock, flags);
+ return module;
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_get_module);
+
+void gb_audio_manager_put_module(struct gb_audio_manager_module *module)
+{
+ kobject_put(&module->kobj);
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_put_module);
+
+int gb_audio_manager_dump_module(int id)
+{
+ struct gb_audio_manager_module *module;
+ unsigned long flags;
+
+ read_lock_irqsave(&modules_lock, flags);
+ module = gb_audio_manager_get_locked(id);
+ read_unlock_irqrestore(&modules_lock, flags);
+
+ if (!module)
+ return -EINVAL;
+
+ gb_audio_manager_module_dump(module);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_dump_module);
+
+void gb_audio_manager_dump_all(void)
+{
+ struct gb_audio_manager_module *module;
+ int count = 0;
+ unsigned long flags;
+
+ read_lock_irqsave(&modules_lock, flags);
+ list_for_each_entry(module, &modules_list, list) {
+ gb_audio_manager_module_dump(module);
+ count++;
+ }
+ read_unlock_irqrestore(&modules_lock, flags);
+
+ pr_info("Number of connected modules: %d\n", count);
+}
+EXPORT_SYMBOL_GPL(gb_audio_manager_dump_all);
+
+/*
+ * module init/deinit
+ */
+static int __init manager_init(void)
+{
+ manager_kset = kset_create_and_add(GB_AUDIO_MANAGER_NAME, NULL,
+ kernel_kobj);
+ if (!manager_kset)
+ return -ENOMEM;
+
+#ifdef GB_AUDIO_MANAGER_SYSFS
+ gb_audio_manager_sysfs_init(&manager_kset->kobj);
+#endif
+
+ return 0;
+}
+
+static void __exit manager_exit(void)
+{
+ gb_audio_manager_remove_all();
+ kset_unregister(manager_kset);
+}
+
+module_init(manager_init);
+module_exit(manager_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Svetlin Ankov <ankov_svetlin@projectara.com>");
--- /dev/null
+/*
+ * Greybus operations
+ *
+ * Copyright 2015-2016 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#ifndef _GB_AUDIO_MANAGER_H_
+#define _GB_AUDIO_MANAGER_H_
+
+#include <linux/kobject.h>
+#include <linux/list.h>
+
+#define GB_AUDIO_MANAGER_NAME "gb_audio_manager"
+#define GB_AUDIO_MANAGER_MODULE_NAME_LEN 64
+#define GB_AUDIO_MANAGER_MODULE_NAME_LEN_SSCANF "63"
+
+struct gb_audio_manager_module_descriptor {
+ char name[GB_AUDIO_MANAGER_MODULE_NAME_LEN];
+ int slot;
+ int vid;
+ int pid;
+ int cport;
+ unsigned int devices;
+};
+
+struct gb_audio_manager_module {
+ struct kobject kobj;
+ struct list_head list;
+ int id;
+ struct gb_audio_manager_module_descriptor desc;
+};
+
+/*
+ * Creates a new gb_audio_manager_module_descriptor, using the specified
+ * descriptor.
+ *
+ * Returns a negative result on error, or the id of the newly created module.
+ *
+ */
+int gb_audio_manager_add(struct gb_audio_manager_module_descriptor *desc);
+
+/*
+ * Removes a connected gb_audio_manager_module_descriptor for the specified ID.
+ *
+ * Returns zero on success, or a negative value on error.
+ */
+int gb_audio_manager_remove(int id);
+
+/*
+ * Removes all connected gb_audio_modules
+ *
+ * Returns zero on success, or a negative value on error.
+ */
+void gb_audio_manager_remove_all(void);
+
+/*
+ * Retrieves a gb_audio_manager_module_descriptor for the specified id.
+ * Returns the gb_audio_manager_module_descriptor structure,
+ * or NULL if there is no module with the specified ID.
+ */
+struct gb_audio_manager_module *gb_audio_manager_get_module(int id);
+
+/*
+ * Decreases the refcount of the module, obtained by the get function.
+ * Modules are removed via gb_audio_manager_remove
+ */
+void gb_audio_manager_put_module(struct gb_audio_manager_module *module);
+
+/*
+ * Dumps the module for the specified id
+ * Return 0 on success
+ */
+int gb_audio_manager_dump_module(int id);
+
+/*
+ * Dumps all connected modules
+ */
+void gb_audio_manager_dump_all(void);
+
+#endif /* _GB_AUDIO_MANAGER_H_ */
--- /dev/null
+/*
+ * Greybus operations
+ *
+ * Copyright 2015-2016 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/slab.h>
+
+#include "audio_manager.h"
+#include "audio_manager_private.h"
+
+#define to_gb_audio_module_attr(x) \
+ container_of(x, struct gb_audio_manager_module_attribute, attr)
+#define to_gb_audio_module(x) \
+ container_of(x, struct gb_audio_manager_module, kobj)
+
+struct gb_audio_manager_module_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr,
+ const char *buf, size_t count);
+};
+
+static ssize_t gb_audio_module_attr_show(
+ struct kobject *kobj, struct attribute *attr, char *buf)
+{
+ struct gb_audio_manager_module_attribute *attribute;
+ struct gb_audio_manager_module *module;
+
+ attribute = to_gb_audio_module_attr(attr);
+ module = to_gb_audio_module(kobj);
+
+ if (!attribute->show)
+ return -EIO;
+
+ return attribute->show(module, attribute, buf);
+}
+
+static ssize_t gb_audio_module_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct gb_audio_manager_module_attribute *attribute;
+ struct gb_audio_manager_module *module;
+
+ attribute = to_gb_audio_module_attr(attr);
+ module = to_gb_audio_module(kobj);
+
+ if (!attribute->store)
+ return -EIO;
+
+ return attribute->store(module, attribute, buf, len);
+}
+
+static const struct sysfs_ops gb_audio_module_sysfs_ops = {
+ .show = gb_audio_module_attr_show,
+ .store = gb_audio_module_attr_store,
+};
+
+static void gb_audio_module_release(struct kobject *kobj)
+{
+ struct gb_audio_manager_module *module = to_gb_audio_module(kobj);
+
+ pr_info("Destroying audio module #%d\n", module->id);
+ /* TODO -> delete from list */
+ kfree(module);
+}
+
+static ssize_t gb_audio_module_name_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s", module->desc.name);
+}
+
+static struct gb_audio_manager_module_attribute gb_audio_module_name_attribute =
+ __ATTR(name, 0664, gb_audio_module_name_show, NULL);
+
+static ssize_t gb_audio_module_slot_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d", module->desc.slot);
+}
+
+static struct gb_audio_manager_module_attribute gb_audio_module_slot_attribute =
+ __ATTR(slot, 0664, gb_audio_module_slot_show, NULL);
+
+static ssize_t gb_audio_module_vid_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d", module->desc.vid);
+}
+
+static struct gb_audio_manager_module_attribute gb_audio_module_vid_attribute =
+ __ATTR(vid, 0664, gb_audio_module_vid_show, NULL);
+
+static ssize_t gb_audio_module_pid_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d", module->desc.pid);
+}
+
+static struct gb_audio_manager_module_attribute gb_audio_module_pid_attribute =
+ __ATTR(pid, 0664, gb_audio_module_pid_show, NULL);
+
+static ssize_t gb_audio_module_cport_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d", module->desc.cport);
+}
+
+static struct gb_audio_manager_module_attribute
+ gb_audio_module_cport_attribute =
+ __ATTR(cport, 0664, gb_audio_module_cport_show, NULL);
+
+static ssize_t gb_audio_module_devices_show(
+ struct gb_audio_manager_module *module,
+ struct gb_audio_manager_module_attribute *attr, char *buf)
+{
+ return sprintf(buf, "0x%X", module->desc.devices);
+}
+
+static struct gb_audio_manager_module_attribute
+ gb_audio_module_devices_attribute =
+ __ATTR(devices, 0664, gb_audio_module_devices_show, NULL);
+
+static struct attribute *gb_audio_module_default_attrs[] = {
+ &gb_audio_module_name_attribute.attr,
+ &gb_audio_module_slot_attribute.attr,
+ &gb_audio_module_vid_attribute.attr,
+ &gb_audio_module_pid_attribute.attr,
+ &gb_audio_module_cport_attribute.attr,
+ &gb_audio_module_devices_attribute.attr,
+ NULL, /* need to NULL terminate the list of attributes */
+};
+
+static struct kobj_type gb_audio_module_type = {
+ .sysfs_ops = &gb_audio_module_sysfs_ops,
+ .release = gb_audio_module_release,
+ .default_attrs = gb_audio_module_default_attrs,
+};
+
+static void send_add_uevent(struct gb_audio_manager_module *module)
+{
+ char name_string[128];
+ char slot_string[64];
+ char vid_string[64];
+ char pid_string[64];
+ char cport_string[64];
+ char devices_string[64];
+
+ char *envp[] = {
+ name_string,
+ slot_string,
+ vid_string,
+ pid_string,
+ cport_string,
+ devices_string,
+ NULL
+ };
+
+ snprintf(name_string, 128, "NAME=%s", module->desc.name);
+ snprintf(slot_string, 64, "SLOT=%d", module->desc.slot);
+ snprintf(vid_string, 64, "VID=%d", module->desc.vid);
+ snprintf(pid_string, 64, "PID=%d", module->desc.pid);
+ snprintf(cport_string, 64, "CPORT=%d", module->desc.cport);
+ snprintf(devices_string, 64, "DEVICES=0x%X", module->desc.devices);
+
+ kobject_uevent_env(&module->kobj, KOBJ_ADD, envp);
+}
+
+int gb_audio_manager_module_create(
+ struct gb_audio_manager_module **module,
+ struct kset *manager_kset,
+ int id, struct gb_audio_manager_module_descriptor *desc)
+{
+ int err;
+ struct gb_audio_manager_module *m;
+
+ m = kzalloc(sizeof(*m), GFP_ATOMIC);
+ if (!m)
+ return -ENOMEM;
+
+ /* Initialize the node */
+ INIT_LIST_HEAD(&m->list);
+
+ /* Set the module id */
+ m->id = id;
+
+ /* Copy the provided descriptor */
+ memcpy(&m->desc, desc, sizeof(*desc));
+
+ /* set the kset */
+ m->kobj.kset = manager_kset;
+
+ /*
+ * Initialize and add the kobject to the kernel. All the default files
+ * will be created here. As we have already specified a kset for this
+ * kobject, we don't have to set a parent for the kobject, the kobject
+ * will be placed beneath that kset automatically.
+ */
+ err = kobject_init_and_add(&m->kobj, &gb_audio_module_type, NULL, "%d",
+ id);
+ if (err) {
+ pr_err("failed initializing kobject for audio module #%d\n",
+ id);
+ kobject_put(&m->kobj);
+ return err;
+ }
+
+ /*
+ * Notify the object was created
+ */
+ send_add_uevent(m);
+
+ *module = m;
+ pr_info("Created audio module #%d\n", id);
+ return 0;
+}
+
+void gb_audio_manager_module_dump(struct gb_audio_manager_module *module)
+{
+ pr_info("audio module #%d name=%s slot=%d vid=%d pid=%d cport=%d devices=0x%X\n",
+ module->id,
+ module->desc.name,
+ module->desc.slot,
+ module->desc.vid,
+ module->desc.pid,
+ module->desc.cport,
+ module->desc.devices);
+}
--- /dev/null
+/*
+ * Greybus operations
+ *
+ * Copyright 2015-2016 Google Inc.
+ *
+ * Released under the GPLv2 only.
+ */
+
+#ifndef _GB_AUDIO_MANAGER_PRIVATE_H_
+#define _GB_AUDIO_MANAGER_PRIVATE_H_
+
+#include <linux/kobject.h>
+
+#include "audio_manager.h"
+
+int gb_audio_manager_module_create(
+ struct gb_audio_manager_module **module,
+ struct kset *manager_kset,
+ int id, struct gb_audio_manager_module_descriptor *desc);
+
+/* module destroyed via kobject_put */
+
+void gb_audio_manager_module_dump(struct gb_audio_manager_module *module);
+
+/* sysfs control */
+void gb_audio_manager_sysfs_init(struct kobject *kobj);
+
+#endif /* _GB_AUDIO_MANAGER_PRIVATE_H_ */
--- /dev/null
+/*
+ * 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 devices=0x%X",
+ desc.name, &desc.slot, &desc.vid, &desc.pid,
+ &desc.cport, &desc.devices);
+
+ if (num != 6)
+ 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);
+}
projects / platform / kernel / linux-rpi.git / commitdiff