[ifxmips]

* adds a rewrite of the tapi drivers + sip app. this is the result of lars' gsoc 2010 project, Thanks !


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23840 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/lqtapi/src/tapi/Makefile

@@ -0,0 +1,7 @@
+
+tapi-objs := tapi-core.o tapi-port.o tapi-input.o
+tapi-objs += tapi-control.o
+tapi-objs += tapi-stream.o
+tapi-objs += tapi-sysfs-port.o
+
+obj-m += tapi.o

package/lqtapi/src/tapi/tapi-control.c

@@ -0,0 +1,193 @@
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <linux/tapi/tapi.h>
+#include <linux/tapi/tapi-ioctl.h>
+
+/* FIXME Does it acutally make sense to allow more then one application at a
+ * time to open the control device? For example calling sync from one app will
+ * also sync all others. */
+
+struct tapi_control_file {
+	struct tapi_device *tdev;
+	struct list_head links;
+};
+
+static struct tapi_endpoint *tapi_lookup_endpoint(struct tapi_device *tdev,
+	unsigned int ep_id)
+{
+	struct tapi_stream *stream;
+
+	if (ep_id < tdev->num_ports)
+		return &tdev->ports[ep_id].ep;
+
+	list_for_each_entry(stream, &tdev->streams, head) {
+		if (stream->ep.id == ep_id)
+			return &stream->ep;
+	}
+
+	return ERR_PTR(-ENOENT);
+}
+
+static inline struct tapi_device *inode_to_tdev(struct inode *inode)
+{
+	return container_of(inode->i_cdev, struct tapi_char_device, cdev)->tdev;
+}
+
+static int tapi_control_open(struct inode *inode, struct file *file)
+{
+	int ret;
+	struct tapi_device *tdev = inode_to_tdev(inode);
+	struct tapi_control_file *tctrl;
+
+	get_device(&tdev->dev);
+
+	tctrl = kzalloc(sizeof(*tctrl), GFP_KERNEL);
+	if (!tctrl) {
+		ret = -ENOMEM;
+		goto err_put_device;
+	}
+
+	INIT_LIST_HEAD(&tctrl->links);
+	tctrl->tdev = tdev;
+
+	file->private_data = tctrl;
+
+	return 0;
+
+err_put_device:
+	put_device(&tdev->dev);
+
+	return ret;
+}
+
+static int tapi_control_release(struct inode *inode, struct file *file)
+{
+	struct tapi_control_file *tctrl = file->private_data;
+	struct tapi_link *link;
+
+	if (tctrl) {
+		list_for_each_entry(link, &tctrl->links, head)
+			tapi_link_free(tctrl->tdev, link);
+
+		put_device(&tctrl->tdev->dev);
+	}
+
+	return 0;
+}
+
+static long tapi_control_ioctl_link_alloc(struct tapi_control_file *tctrl,
+	unsigned long arg)
+{
+	struct tapi_link *link;
+	struct tapi_endpoint *ep1, *ep2;
+
+	ep1 = tapi_lookup_endpoint(tctrl->tdev, arg >> 16);
+	ep2 = tapi_lookup_endpoint(tctrl->tdev, arg & 0xffff);
+
+	link = tapi_link_alloc(tctrl->tdev, ep1, ep2);
+	if (IS_ERR(link))
+		return PTR_ERR(link);
+
+	list_add_tail(&link->head, &tctrl->links);
+
+	return link->id;
+}
+
+struct tapi_link *tapi_control_lookup_link(struct tapi_control_file *tctrl,
+	unsigned int id)
+{
+	struct tapi_link *link;
+
+	list_for_each_entry(link, &tctrl->links, head) {
+		if (link->id == id)
+			return link;
+	}
+
+	return NULL;
+}
+
+static long tapi_control_ioctl_link_free(struct tapi_control_file *tctrl,
+	unsigned long arg)
+{
+	struct tapi_link *link = tapi_control_lookup_link(tctrl, arg);
+	if (!link)
+		return -ENOENT;
+
+	tapi_link_free(tctrl->tdev, link);
+	list_del(&link->head);
+
+	return 0;
+}
+
+static long tapi_control_ioctl_link_enable(struct tapi_control_file *tctrl,
+	unsigned long arg)
+{
+	struct tapi_link *link = tapi_control_lookup_link(tctrl, arg);
+	if (!link)
+		return -ENOENT;
+
+	return tapi_link_enable(tctrl->tdev, link);
+}
+
+static long tapi_control_ioctl_link_disable(struct tapi_control_file *tctrl,
+	unsigned long arg)
+{
+	struct tapi_link *link = tapi_control_lookup_link(tctrl, arg);
+	if (!link)
+		return -ENOENT;
+
+	return tapi_link_disable(tctrl->tdev, link);
+}
+
+static long tapi_control_ioctl_sync(struct tapi_control_file *tctrl)
+{
+	return tapi_sync(tctrl->tdev);
+}
+
+static long tapi_control_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	int ret;
+	struct tapi_control_file *tctrl = file->private_data;
+
+	switch (cmd) {
+	case TAPI_CONTROL_IOCTL_LINK_ALLOC:
+		ret = tapi_control_ioctl_link_alloc(tctrl, arg);
+		break;
+	case TAPI_CONTROL_IOCTL_LINK_FREE:
+		ret = tapi_control_ioctl_link_free(tctrl, arg);
+		break;
+	case TAPI_CONTROL_IOCTL_LINK_ENABLE:
+		ret = tapi_control_ioctl_link_enable(tctrl, arg);
+		break;
+	case TAPI_CONTROL_IOCTL_LINK_DISABLE:
+		ret = tapi_control_ioctl_link_disable(tctrl, arg);
+		break;
+	case TAPI_CONTROL_IOCTL_SYNC:
+		ret = tapi_control_ioctl_sync(tctrl);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct file_operations tapi_control_file_ops = {
+	.owner = THIS_MODULE,
+	.open = tapi_control_open,
+	.release = tapi_control_release,
+	.unlocked_ioctl = tapi_control_ioctl,
+};
+
+int tapi_register_control_device(struct tapi_device* tdev)
+{
+	dev_set_name(&tdev->control_dev.dev, "tapi%uC", tdev->id);
+	return tapi_char_device_register(tdev, &tdev->control_dev, &tapi_control_file_ops);
+}

package/lqtapi/src/tapi/tapi-core.c

@@ -0,0 +1,250 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/list.h>
+
+#include <linux/cdev.h>
+#include <linux/err.h>
+
+#include <linux/tapi/tapi.h>
+
+
+void tapi_alloc_input(struct tapi_device *tdev, struct tapi_port *port);
+int tapi_register_port_device(struct tapi_device* tdev, struct tapi_port *port);
+int tapi_register_stream_device(struct tapi_device* tdev);
+int tapi_register_control_device(struct tapi_device* tdev);
+
+static struct class *tapi_class;
+static int tapi_major;
+
+#define TAPI_MAX_MINORS 255
+
+static bool tapi_minors[TAPI_MAX_MINORS];
+
+static int tapi_get_free_minor(void)
+{
+	int i;
+	for (i = 0; i < TAPI_MAX_MINORS; ++i) {
+		if (!tapi_minors[i]) {
+			tapi_minors[i] = true;
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+/*
+int tapi_port_send_dtmf_events(struct tapi_device *tdev, unsigned int port, struct tapi_dtmf *, size_t num_events, unsigned int dealy)
+{
+}
+EXPORT_SYMBOL_GPL(tapi_port_send_dtmf_events);
+*/
+
+void tapi_report_hook_event(struct tapi_device *tdev, struct tapi_port *port,
+	bool on)
+{
+	struct tapi_event event;
+	event.type = TAPI_EVENT_TYPE_HOOK;
+	event.port = port->id;
+	event.hook.on = on;
+
+	tapi_report_event(tdev, &event);
+}
+EXPORT_SYMBOL_GPL(tapi_report_hook_event);
+
+void tapi_report_dtmf_event(struct tapi_device *tdev, struct tapi_port *port,
+	unsigned char code)
+{
+	struct tapi_event event;
+	event.type = TAPI_EVENT_TYPE_DTMF;
+	event.port = port->id;
+	event.dtmf.code = code;
+
+	tapi_report_event(tdev, &event);
+}
+EXPORT_SYMBOL_GPL(tapi_report_dtmf_event);
+
+struct tapi_stream *tapi_stream_alloc(struct tapi_device *tdev)
+{
+	struct tapi_stream *stream;
+	printk("tdev %p\n", tdev);
+
+	if (!tdev->ops || !tdev->ops->stream_alloc)
+		return ERR_PTR(-ENOSYS);
+
+	stream = tdev->ops->stream_alloc(tdev);
+	printk("stream %p\n", stream);
+	if (IS_ERR(stream))
+		return stream;
+
+	stream->id = atomic_inc_return(&tdev->stream_id) - 1;
+	stream->ep.id = stream->id;
+
+/*	mutex_lock(&tdev->lock);*/
+	list_add_tail(&stream->head, &tdev->streams);
+/*	mutex_unlock(&tdev->lock);*/
+
+	return stream;
+}
+EXPORT_SYMBOL_GPL(tapi_stream_alloc);
+
+void tapi_stream_free(struct tapi_device *tdev, struct tapi_stream *stream)
+{
+	mutex_lock(&tdev->lock);
+	list_del(&stream->head);
+	mutex_unlock(&tdev->lock);
+
+	tdev->ops->stream_free(tdev, stream);
+}
+EXPORT_SYMBOL_GPL(tapi_stream_free);
+
+struct tapi_link *tapi_link_alloc(struct tapi_device *tdev,
+	struct tapi_endpoint *ep1, struct tapi_endpoint *ep2)
+{
+	struct tapi_link *link;
+
+	if (!tdev->ops || !tdev->ops->link_alloc)
+		return ERR_PTR(-ENOSYS);
+
+	link = tdev->ops->link_alloc(tdev, ep1, ep2);
+	if (IS_ERR(link))
+		return link;
+
+	link->id = atomic_inc_return(&tdev->link_id) - 1;
+
+/*
+	mutex_lock(&tdev->lock);
+	list_add_tail(&link->head, &tdev->links);
+	mutex_unlock(&tdev->lock);
+*/
+	return link;
+}
+EXPORT_SYMBOL_GPL(tapi_link_alloc);
+
+void tapi_link_free(struct tapi_device *tdev, struct tapi_link *link)
+{
+/*
+	mutex_lock(&tdev->lock);
+	list_del(&link->head);
+	mutex_unlock(&tdev->lock);
+*/
+	tdev->ops->link_free(tdev, link);
+}
+EXPORT_SYMBOL_GPL(tapi_link_free);
+
+int tapi_char_device_register(struct tapi_device *tdev,
+	struct tapi_char_device *tchrdev, const struct file_operations *fops)
+{
+	int ret;
+	struct device *dev = &tchrdev->dev;
+	dev_t devt;
+	int minor = tapi_get_free_minor();
+
+	devt = MKDEV(tapi_major, minor);
+
+	dev->devt = devt;
+	dev->class = tapi_class;
+	dev->parent = &tdev->dev;
+
+	tchrdev->tdev = tdev;
+
+	cdev_init(&tchrdev->cdev, fops);
+	tchrdev->cdev.owner = THIS_MODULE;
+	ret = cdev_add(&tchrdev->cdev, devt, 1);
+	if (ret)
+		return ret;
+
+	ret = device_register(&tchrdev->dev);
+	if (ret)
+		goto err_cdev_del;
+
+	return 0;
+
+err_cdev_del:
+	cdev_del(&tchrdev->cdev);
+
+	return ret;
+}
+
+int tapi_device_register(struct tapi_device *tdev, const char *name,
+	struct device *parent)
+{
+	static atomic_t tapi_device_id = ATOMIC_INIT(0);
+	int ret, i;
+
+	tdev->dev.class = tapi_class;
+	tdev->dev.parent = parent;
+	dev_set_name(&tdev->dev, "%s", name);
+
+	ret = device_register(&tdev->dev);
+	if (ret)
+		return ret;
+
+	tdev->id = atomic_inc_return(&tapi_device_id) - 1;
+
+	mutex_init(&tdev->lock);
+	INIT_LIST_HEAD(&tdev->streams);
+	INIT_LIST_HEAD(&tdev->links);
+	atomic_set(&tdev->link_id, 0);
+	atomic_set(&tdev->stream_id, tdev->num_ports);
+
+	tapi_register_stream_device(tdev);
+	tapi_register_control_device(tdev);
+
+	for (i = 0; i < tdev->num_ports; ++i) {
+		tapi_port_alloc(tdev, i);
+		tapi_alloc_input(tdev, &tdev->ports[i]);
+		tapi_register_port_device(tdev, &tdev->ports[i]);
+		tdev->ports[i].id = i;
+		tdev->ports[i].ep.id = i;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(tapi_device_register);
+
+void tapi_device_unregister(struct tapi_device *tdev)
+{
+	device_unregister(&tdev->dev);
+}
+EXPORT_SYMBOL_GPL(tapi_device_unregister);
+
+static int __init tapi_class_init(void)
+{
+	int ret;
+	dev_t dev;
+
+	tapi_class = class_create(THIS_MODULE, "tapi");
+
+	if (IS_ERR(tapi_class)) {
+		ret = PTR_ERR(tapi_class);
+		printk(KERN_ERR "tapi: Failed to create device class: %d\n", ret);
+		goto err;
+	}
+
+	ret = alloc_chrdev_region(&dev, 0, TAPI_MAX_MINORS, "tapi");
+	if (ret) {
+		printk(KERN_ERR "tapi: Failed to allocate chrdev region: %d\n", ret);
+		goto err_class_destory;
+	}
+	tapi_major = MAJOR(dev);
+
+	return 0;
+err_class_destory:
+	class_destroy(tapi_class);
+err:
+	return ret;
+}
+subsys_initcall(tapi_class_init);
+
+static void __exit tapi_class_exit(void)
+{
+	unregister_chrdev_region(MKDEV(tapi_major, 0), TAPI_MAX_MINORS);
+	class_destroy(tapi_class);
+}
+module_exit(tapi_class_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("TAPI class");
+MODULE_LICENSE("GPL");

package/lqtapi/src/tapi/tapi-input.c

@@ -0,0 +1,99 @@
+
+#include <linux/tapi/tapi.h>
+
+#include <linux/input.h>
+
+static unsigned short tapi_keycodes[] = {
+	[0] = KEY_NUMERIC_0,
+	[1] = KEY_NUMERIC_1,
+	[2] = KEY_NUMERIC_2,
+	[3] = KEY_NUMERIC_3,
+	[4] = KEY_NUMERIC_4,
+	[5] = KEY_NUMERIC_5,
+	[6] = KEY_NUMERIC_6,
+	[7] = KEY_NUMERIC_7,
+	[8] = KEY_NUMERIC_8,
+	[9] = KEY_NUMERIC_9,
+	[10] = KEY_NUMERIC_STAR,
+	[11] = KEY_NUMERIC_POUND,
+	[12] = KEY_ENTER,
+	[13] = KEY_ESC,
+};
+
+static int tapi_input_event(struct input_dev *input, unsigned int type,
+	unsigned int code, int value)
+{
+	struct tapi_device *tdev = dev_to_tapi(input->dev.parent);
+	struct tapi_port *port = input_get_drvdata(input);
+
+
+	if (type != EV_SND || code != SND_BELL)
+		return -EINVAL;
+
+	tapi_port_set_ring(tdev, port, value);
+
+	return 0;
+}
+
+void tapi_alloc_input(struct tapi_device *tdev, struct tapi_port *port)
+{
+	struct input_dev *input;
+	int i;
+	char *phys;
+
+	input = input_allocate_device();
+
+	phys = kzalloc(sizeof("tapi/input000"), GFP_KERNEL);
+	sprintf(phys, "tapi/input%d", port->id);
+
+	input->name = "tapi";
+	input->phys = phys;
+	input->id.bustype = BUS_HOST;
+	input->dev.parent = &tdev->dev;
+	input->evbit[0] = BIT(EV_KEY) | BIT(EV_SND);
+	input->sndbit[0] = BIT(SND_BELL);
+
+	input->event = tapi_input_event;
+
+	input->keycodesize = sizeof(unsigned short);
+	input->keycodemax = ARRAY_SIZE(tapi_keycodes);
+	input->keycode = tapi_keycodes;
+
+	port->input = input;
+
+	for (i = 0; i < ARRAY_SIZE(tapi_keycodes); ++i)
+		__set_bit(tapi_keycodes[i], input->keybit);
+
+	input_set_drvdata(input, port);
+	input_register_device(input);
+}
+
+void tapi_report_event(struct tapi_device *tdev,
+	struct tapi_event *event)
+{
+	unsigned short key_code;
+	struct input_dev *input;
+
+	if (!tdev || !tdev->ports)
+		return;
+
+	switch (event->type) {
+		case TAPI_EVENT_TYPE_HOOK:
+			if (event->hook.on)
+				key_code = KEY_ENTER;
+			else
+				key_code = KEY_ESC;
+			break;
+		case TAPI_EVENT_TYPE_DTMF:
+			key_code = tapi_keycodes[event->dtmf.code];
+			break;
+		default:
+			return;
+	}
+
+	input = tdev->ports[event->port].input;
+	input_report_key(input, key_code, 1);
+	input_sync(input);
+	input_report_key(input, key_code, 0);
+	input_sync(input);
+}

package/lqtapi/src/tapi/tapi-nl.c

@@ -0,0 +1,62 @@
+
+static struct tapi_attr default_port[] = {
+	[PORTS] = {
+		.type = TAPI_TYPE_PORTS,
+		.name = "ports",
+		.description = "foobar",
+		.set = tapi_set_ports,
+		.get = tapi_get_ports,
+	},
+};
+
+static const struct nla_policy tapi_policy[] = {
+	[TAPI_ATTR_ID] = { .type = NLA_U32 },
+	[TAPI_ATTR_PORT] = { .type = NLA_U32 },
+	[TAPI_ATTR_ENDPOINT] = { .type = NLA_U32 },
+	[TAPI_ATTR_STREAM] = { .type = NLA_U32 }
+};
+
+static const struct nla_policy tapi_port_policy[] = {
+	[TAPI_PORT_ID] = { .type = NLA_U32 },
+};
+
+static const struct nla_policy tapi_endpoint_policy[] = {
+	[TAPI_ENDPOINT_ID] = { .type = NLA_U32 },
+};
+
+static const struct nla_policy tapi_stream_policy[] = {
+	[TAPI_STREAM_ID] = { .type = NLA_U32 },
+};
+
+static struct genl_family tapi_nl_family = {
+	.id = GENL_ID_GENERATE,
+	.name = "tapi",
+	.hdrsize = 0,
+	.version = 1,
+	.maxattr = ARRAY_SIZE(tapi_policy),
+};
+
+
+
+static struct genl_ops tapi_nl_ops[] = {
+	TAPI_NL_OP(TAPI_CMD_LIST, list_attr),
+
+};
+
+static int __init tapi_nl_init(void)
+{
+	ret = genl_unregister_family(&tapi_nl_family);
+	if (ret)
+		return ret;
+
+	genl_register_ops(&tapi_nl_family, tapi_nl_ops);
+
+	return 0;
+}
+module_init(tapi_nl_init);
+
+static void __exit tapi_nl_exit(void)
+{
+	genl_unregister_family(&tapi_nl_family);
+}
+

package/lqtapi/src/tapi/tapi-port.c

@@ -0,0 +1,82 @@
+#include <linux/cdev.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <linux/tapi/tapi.h>
+#include <linux/tapi/tapi-ioctl.h>
+
+static inline struct tapi_port *tapi_char_device_to_port(struct tapi_char_device *chrdev)
+{
+	return container_of(chrdev, struct tapi_port, chrdev);
+}
+
+static int tapi_port_open(struct inode *inode, struct file *file)
+{
+	struct tapi_device *tdev = cdev_to_tapi_char_device(inode->i_cdev)->tdev;
+
+	get_device(&tdev->dev);
+	file->private_data = cdev_to_tapi_char_device(inode->i_cdev);
+
+	return 0;
+}
+
+static int tapi_port_release(struct inode *inode, struct file *file)
+{
+	struct tapi_device *tdev = cdev_to_tapi_char_device(inode->i_cdev)->tdev;
+
+	put_device(&tdev->dev);
+
+	return 0;
+}
+
+static long tapi_port_ioctl_get_endpoint(struct tapi_device *tdev,
+	struct tapi_port *port, unsigned long arg)
+{
+	return port->ep.id;
+}
+
+static long tapi_port_ioctl_set_ring(struct tapi_device *tdev,
+	struct tapi_port *port, unsigned long arg)
+{
+	tapi_port_set_ring(tdev, port, arg);
+	return 0;
+}
+
+static long tapi_port_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	int ret;
+	struct tapi_char_device *tchrdev = file->private_data;
+	struct tapi_device *tdev = tchrdev->tdev;
+	struct tapi_port *port = tapi_char_device_to_port(tchrdev);
+
+	switch (cmd) {
+	case TAPI_PORT_IOCTL_GET_ENDPOINT:
+		ret = tapi_port_ioctl_get_endpoint(tdev, port, arg);
+		break;
+	case TAPI_PORT_IOCTL_SET_RING:
+		ret = tapi_port_ioctl_set_ring(tdev, port, arg);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static const struct file_operations tapi_port_file_ops = {
+	.owner = THIS_MODULE,
+	.open = tapi_port_open,
+	.release = tapi_port_release,
+	.unlocked_ioctl = tapi_port_ioctl,
+};
+
+int tapi_register_port_device(struct tapi_device* tdev, struct tapi_port *port)
+{
+	dev_set_name(&port->chrdev.dev, "tapi%uP%u", tdev->id, port->id);
+	return tapi_char_device_register(tdev, &port->chrdev, &tapi_port_file_ops);
+}

package/lqtapi/src/tapi/tapi-stream.c

@@ -0,0 +1,201 @@
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/poll.h>
+
+#include <linux/tapi/tapi.h>
+#include <linux/tapi/tapi-ioctl.h>
+
+
+struct tapi_stream_file {
+	struct tapi_device *tdev;
+	struct tapi_stream *stream;
+};
+
+static inline struct tapi_device *inode_to_tdev(struct inode *inode)
+{
+	return container_of(inode->i_cdev, struct tapi_char_device, cdev)->tdev;
+}
+
+static int tapi_stream_open(struct inode *inode, struct file *file)
+{
+	int ret;
+	struct tapi_device *tdev = inode_to_tdev(inode);
+	struct tapi_stream_file *stream;
+
+	get_device(&tdev->dev);
+
+	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
+	if (!stream) {
+		ret = -ENOMEM;
+		goto err_put;
+	}
+
+	stream->stream = tapi_stream_alloc(tdev);
+	if (IS_ERR(stream->stream)) {
+		ret = PTR_ERR(stream->stream);
+		goto err_free;
+	}
+	stream->tdev = tdev;
+
+	init_waitqueue_head(&stream->stream->recv_wait);
+	skb_queue_head_init(&stream->stream->recv_queue);
+
+	file->private_data = stream;
+
+	return 0;
+
+err_free:
+	kfree(stream);
+err_put:
+	put_device(&tdev->dev);
+	return ret;
+}
+
+static int tapi_stream_release(struct inode *inode, struct file *file)
+{
+	struct tapi_stream_file *stream = file->private_data;
+
+	if (stream) {
+		tapi_stream_free(stream->tdev, stream->stream);
+		put_device(&stream->tdev->dev);
+		kfree(stream);
+	}
+
+	return 0;
+}
+
+static long tapi_stream_ioctl(struct file *file, unsigned int cmd,
+	unsigned long arg)
+{
+	int ret = 0;
+	struct tapi_stream_file *stream = file->private_data;
+	struct tapi_device *tdev = stream->tdev;
+
+	switch (cmd) {
+	case TAPI_STREAM_IOCTL_GET_ENDPOINT:
+		ret = stream->stream->ep.id;
+		break;
+	case TAPI_STREAM_IOCTL_CONFIGURE:
+		break;
+	case TAPI_STREAM_IOCTL_START:
+		ret = tapi_stream_start(tdev, stream->stream);
+		break;
+	case TAPI_STREAM_IOCTL_STOP:
+		ret = tapi_stream_stop(tdev, stream->stream);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static unsigned int tapi_stream_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct tapi_stream_file *stream = file->private_data;
+	int ret;
+
+	poll_wait(file, &stream->stream->recv_wait, wait);
+
+	ret = POLLOUT;
+
+	if (!skb_queue_empty(&stream->stream->recv_queue))
+		ret |= POLLIN;
+
+	return ret;
+}
+
+static ssize_t tapi_stream_read(struct file *file, char __user *buffer,
+	size_t count, loff_t *offset)
+{
+	struct tapi_stream_file *stream = file->private_data;
+	struct sk_buff *skb;
+
+	skb = skb_dequeue(&stream->stream->recv_queue);
+	if (!skb) {
+		if (file->f_flags & O_NONBLOCK)
+			return -EAGAIN;
+
+		do {
+			interruptible_sleep_on(&stream->stream->recv_wait);
+			skb = skb_dequeue(&stream->stream->recv_queue);
+		} while (skb == NULL && !signal_pending(current));
+
+		if (skb == NULL)
+			return -ERESTARTNOHAND;
+	}
+
+	if (skb->len > count) {
+		skb_queue_head(&stream->stream->recv_queue, skb);
+		return -EMSGSIZE;
+	}
+
+	if (copy_to_user(buffer, skb->data, skb->len)) {
+		skb_queue_head(&stream->stream->recv_queue, skb);
+		return -EFAULT;
+	}
+
+	count = skb->len;
+
+	kfree_skb(skb);
+
+	return count;
+}
+
+static ssize_t tapi_stream_write(struct file *file, const char __user *buffer,
+	size_t count, loff_t *ppos)
+{
+	struct tapi_stream_file *stream = file->private_data;
+	struct tapi_device *tdev = stream->tdev;
+	struct sk_buff *skb;
+
+	if (count == 0)
+		return 0;
+
+	skb = alloc_skb(count, GFP_USER);
+	if (!skb)
+		return -ENOMEM;
+
+	if (copy_from_user(skb_put(skb, count), buffer, count)) {
+		kfree_skb(skb);
+		return -EFAULT;
+	}
+
+	tdev->ops->stream_send(tdev, stream->stream, skb);
+
+	return count;
+}
+
+static const struct file_operations tapi_stream_file_ops = {
+	.owner = THIS_MODULE,
+	.read = tapi_stream_read,
+	.write = tapi_stream_write,
+	.open = tapi_stream_open,
+	.release = tapi_stream_release,
+	.poll = tapi_stream_poll,
+	.unlocked_ioctl = tapi_stream_ioctl,
+};
+
+int tapi_register_stream_device(struct tapi_device* tdev)
+{
+	dev_set_name(&tdev->stream_dev.dev, "tapi%uS", tdev->id);
+	return tapi_char_device_register(tdev, &tdev->stream_dev, &tapi_stream_file_ops);
+}
+
+int tapi_stream_recv(struct tapi_device *tdev, struct tapi_stream * stream,
+	struct sk_buff *skb)
+{
+	skb_queue_tail(&stream->recv_queue, skb);
+	wake_up(&stream->recv_wait);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(tapi_stream_recv);

package/lqtapi/src/tapi/tapi-sysfs-port.c

@@ -0,0 +1,107 @@
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sysfs.h>
+
+#include <linux/err.h>
+#include <linux/tapi/tapi.h>
+
+struct tapi_sysfs_port {
+	struct tapi_device *tdev;
+	unsigned int id;
+	struct kobject kobj;
+};
+
+struct tapi_sysfs_entry {
+	ssize_t (*show)(struct tapi_device *, unsigned int port, char *);
+	ssize_t (*store)(struct tapi_device *, unsigned int port, const char *, size_t);
+	struct attribute attr;
+};
+
+static ssize_t tapi_port_store(struct kobject *kobj, struct attribute *attr,
+	const char *s, size_t len)
+{
+	struct tapi_sysfs_port *port = container_of(kobj, struct tapi_sysfs_port, kobj);
+	struct tapi_sysfs_entry *entry = container_of(attr, struct tapi_sysfs_entry,
+								attr);
+
+	if (!entry->store)
+		return -ENOSYS;
+
+	return entry->store(port->tdev, port->id, s, len);
+}
+
+static ssize_t tapi_port_show(struct kobject *kobj, struct attribute *attr,
+	char *s)
+{
+	return -ENOSYS;
+}
+
+#define TAPI_PORT_ATTR(_name, _mode, _show, _store) \
+	struct tapi_sysfs_entry tapi_port_ ## _name ## _attr = \
+		__ATTR(_name, _mode, _show, _store)
+
+static int tapi_port_store_ring(struct tapi_device *tdev, unsigned int port,
+	const char *s, size_t len)
+{
+	int ret;
+	unsigned long val;
+
+	ret = strict_strtoul(s, 10, &val);
+
+	if (ret)
+		return ret;
+
+	ret = tapi_port_set_ring(tdev, &tdev->ports[port], val);
+	if (ret)
+		return ret;
+	return len;
+}
+
+static TAPI_PORT_ATTR(ring, 0644, NULL, tapi_port_store_ring);
+
+static struct attribute *tapi_port_default_attrs[] = {
+	&tapi_port_ring_attr.attr,
+	NULL,
+};
+
+static void tapi_port_free(struct kobject *kobj)
+{
+	struct tapi_sysfs_port *port = container_of(kobj, struct tapi_sysfs_port, kobj);
+	kfree(port);
+}
+
+static struct sysfs_ops tapi_port_sysfs_ops = {
+	.show		= tapi_port_show,
+	.store		= tapi_port_store,
+};
+
+static struct kobj_type tapi_port_ktype = {
+	.release	= tapi_port_free,
+	.sysfs_ops	= &tapi_port_sysfs_ops,
+	.default_attrs	= tapi_port_default_attrs,
+};
+
+struct tapi_sysfs_port *tapi_port_alloc(struct tapi_device *tdev, unsigned int id)
+{
+	struct tapi_sysfs_port *port;
+	int ret;
+
+	port = kzalloc(sizeof(*port), GFP_KERNEL);
+	port->tdev = tdev;
+	port->id = id;
+
+	ret = kobject_init_and_add(&port->kobj, &tapi_port_ktype, &tdev->dev.kobj,
+		"port%d", id);
+	if (ret) {
+		kfree(port);
+		return ERR_PTR(ret);
+	}
+
+	return port;
+}
+
+void tapi_port_delete(struct tapi_sysfs_port *port)
+{
+	kobject_del(&port->kobj);
+	kobject_put(&port->kobj);
+}