--- /dev/null
+/*
+ *
+ * Generic Bluetooth USB driver
+ *
+ * Copyright (C) 2005-2007 Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/skbuff.h>
+
+#include <linux/usb.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+//#define CONFIG_BT_HCIBTUSB_DEBUG
+#ifndef CONFIG_BT_HCIBTUSB_DEBUG
+#undef BT_DBG
+#define BT_DBG(D...)
+#endif
+
+#define VERSION "0.1"
+
+static struct usb_device_id btusb_table[] = {
+ /* Generic Bluetooth USB device */
+ { USB_DEVICE_INFO(0xe0, 0x01, 0x01) },
+
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, btusb_table);
+
+static struct usb_device_id blacklist_table[] = {
+ { } /* Terminating entry */
+};
+
+#define BTUSB_INTR_RUNNING 0
+#define BTUSB_BULK_RUNNING 1
+
+struct btusb_data {
+ struct hci_dev *hdev;
+ struct usb_device *udev;
+
+ spinlock_t lock;
+
+ unsigned long flags;
+
+ struct work_struct work;
+
+ struct usb_anchor tx_anchor;
+ struct usb_anchor intr_anchor;
+ struct usb_anchor bulk_anchor;
+
+ struct usb_endpoint_descriptor *intr_ep;
+ struct usb_endpoint_descriptor *bulk_tx_ep;
+ struct usb_endpoint_descriptor *bulk_rx_ep;
+};
+
+static void btusb_intr_complete(struct urb *urb)
+{
+ struct hci_dev *hdev = urb->context;
+ struct btusb_data *data = hdev->driver_data;
+ int err;
+
+ BT_DBG("%s urb %p status %d count %d", hdev->name,
+ urb, urb->status, urb->actual_length);
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags))
+ return;
+
+ if (urb->status == 0) {
+ if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
+ urb->transfer_buffer,
+ urb->actual_length) < 0) {
+ BT_ERR("%s corrupted event packet", hdev->name);
+ hdev->stat.err_rx++;
+ }
+ }
+
+ if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
+ return;
+
+ usb_anchor_urb(urb, &data->intr_anchor);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ BT_ERR("%s urb %p failed to resubmit (%d)",
+ hdev->name, urb, -err);
+ usb_unanchor_urb(urb);
+ }
+}
+
+static inline int btusb_submit_intr_urb(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+ struct urb *urb;
+ unsigned char *buf;
+ unsigned int pipe;
+ int err, size;
+
+ BT_DBG("%s", hdev->name);
+
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb)
+ return -ENOMEM;
+
+ size = le16_to_cpu(data->intr_ep->wMaxPacketSize);
+
+ buf = kmalloc(size, GFP_ATOMIC);
+ if (!buf) {
+ usb_free_urb(urb);
+ return -ENOMEM;
+ }
+
+ pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);
+
+ usb_fill_int_urb(urb, data->udev, pipe, buf, size,
+ btusb_intr_complete, hdev,
+ data->intr_ep->bInterval);
+
+ urb->transfer_flags |= URB_FREE_BUFFER;
+
+ usb_anchor_urb(urb, &data->intr_anchor);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ BT_ERR("%s urb %p submission failed (%d)",
+ hdev->name, urb, -err);
+ usb_unanchor_urb(urb);
+ kfree(buf);
+ }
+
+ usb_free_urb(urb);
+
+ return err;
+}
+
+static void btusb_bulk_complete(struct urb *urb)
+{
+ struct hci_dev *hdev = urb->context;
+ struct btusb_data *data = hdev->driver_data;
+ int err;
+
+ BT_DBG("%s urb %p status %d count %d", hdev->name,
+ urb, urb->status, urb->actual_length);
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags))
+ return;
+
+ if (urb->status == 0) {
+ if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
+ urb->transfer_buffer,
+ urb->actual_length) < 0) {
+ BT_ERR("%s corrupted ACL packet", hdev->name);
+ hdev->stat.err_rx++;
+ }
+ }
+
+ if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
+ return;
+
+ usb_anchor_urb(urb, &data->bulk_anchor);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ BT_ERR("%s urb %p failed to resubmit (%d)",
+ hdev->name, urb, -err);
+ usb_unanchor_urb(urb);
+ }
+}
+
+static inline int btusb_submit_bulk_urb(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+ struct urb *urb;
+ unsigned char *buf;
+ unsigned int pipe;
+ int err, size;
+
+ BT_DBG("%s", hdev->name);
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+
+ size = le16_to_cpu(data->bulk_rx_ep->wMaxPacketSize);
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf) {
+ usb_free_urb(urb);
+ return -ENOMEM;
+ }
+
+ pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);
+
+ usb_fill_bulk_urb(urb, data->udev, pipe,
+ buf, size, btusb_bulk_complete, hdev);
+
+ urb->transfer_flags |= URB_FREE_BUFFER;
+
+ usb_anchor_urb(urb, &data->bulk_anchor);
+
+ err = usb_submit_urb(urb, GFP_KERNEL);
+ if (err < 0) {
+ BT_ERR("%s urb %p submission failed (%d)",
+ hdev->name, urb, -err);
+ usb_unanchor_urb(urb);
+ kfree(buf);
+ }
+
+ usb_free_urb(urb);
+
+ return err;
+}
+
+static void btusb_tx_complete(struct urb *urb)
+{
+ struct sk_buff *skb = urb->context;
+ struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+
+ BT_DBG("%s urb %p status %d count %d", hdev->name,
+ urb, urb->status, urb->actual_length);
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags))
+ goto done;
+
+ if (!urb->status)
+ hdev->stat.byte_tx += urb->transfer_buffer_length;
+ else
+ hdev->stat.err_tx++;
+
+done:
+ kfree(urb->setup_packet);
+
+ kfree_skb(skb);
+}
+
+static int btusb_open(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+ int err;
+
+ BT_DBG("%s", hdev->name);
+
+ if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
+ return 0;
+
+ if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
+ return 0;
+
+ err = btusb_submit_intr_urb(hdev);
+ if (err < 0) {
+ clear_bit(BTUSB_INTR_RUNNING, &hdev->flags);
+ clear_bit(HCI_RUNNING, &hdev->flags);
+ }
+
+ return err;
+}
+
+static int btusb_close(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+
+ BT_DBG("%s", hdev->name);
+
+ if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
+ return 0;
+
+ clear_bit(BTUSB_BULK_RUNNING, &data->flags);
+ usb_kill_anchored_urbs(&data->bulk_anchor);
+
+ clear_bit(BTUSB_INTR_RUNNING, &data->flags);
+ usb_kill_anchored_urbs(&data->intr_anchor);
+
+ return 0;
+}
+
+static int btusb_flush(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+
+ BT_DBG("%s", hdev->name);
+
+ usb_kill_anchored_urbs(&data->tx_anchor);
+
+ return 0;
+}
+
+static int btusb_send_frame(struct sk_buff *skb)
+{
+ struct hci_dev *hdev = (struct hci_dev *) skb->dev;
+ struct btusb_data *data = hdev->driver_data;
+ struct usb_ctrlrequest *dr;
+ struct urb *urb;
+ unsigned int pipe;
+ int err;
+
+ BT_DBG("%s", hdev->name);
+
+ if (!test_bit(HCI_RUNNING, &hdev->flags))
+ return -EBUSY;
+
+ switch (bt_cb(skb)->pkt_type) {
+ case HCI_COMMAND_PKT:
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb)
+ return -ENOMEM;
+
+ dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
+ if (!dr) {
+ usb_free_urb(urb);
+ return -ENOMEM;
+ }
+
+ dr->bRequestType = USB_TYPE_CLASS;
+ dr->bRequest = 0;
+ dr->wIndex = 0;
+ dr->wValue = 0;
+ dr->wLength = __cpu_to_le16(skb->len);
+
+ pipe = usb_sndctrlpipe(data->udev, 0x00);
+
+ usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
+ skb->data, skb->len, btusb_tx_complete, skb);
+
+ hdev->stat.cmd_tx++;
+ break;
+
+ case HCI_ACLDATA_PKT:
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+ if (!urb)
+ return -ENOMEM;
+
+ pipe = usb_sndbulkpipe(data->udev,
+ data->bulk_tx_ep->bEndpointAddress);
+
+ usb_fill_bulk_urb(urb, data->udev, pipe,
+ skb->data, skb->len, btusb_tx_complete, skb);
+
+ hdev->stat.acl_tx++;
+ break;
+
+ case HCI_SCODATA_PKT:
+ hdev->stat.sco_tx++;
+ kfree_skb(skb);
+ return 0;
+
+ default:
+ return -EILSEQ;
+ }
+
+ usb_anchor_urb(urb, &data->tx_anchor);
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ BT_ERR("%s urb %p submission failed", hdev->name, urb);
+ kfree(urb->setup_packet);
+ usb_unanchor_urb(urb);
+ }
+
+ usb_free_urb(urb);
+
+ return err;
+}
+
+static void btusb_destruct(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hdev->driver_data;
+
+ BT_DBG("%s", hdev->name);
+
+ kfree(data);
+}
+
+static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
+{
+ struct btusb_data *data = hdev->driver_data;
+
+ BT_DBG("%s evt %d", hdev->name, evt);
+
+ if (evt == HCI_NOTIFY_CONN_ADD || evt == HCI_NOTIFY_CONN_DEL)
+ schedule_work(&data->work);
+}
+
+static void btusb_work(struct work_struct *work)
+{
+ struct btusb_data *data = container_of(work, struct btusb_data, work);
+ struct hci_dev *hdev = data->hdev;
+
+ if (hdev->conn_hash.acl_num == 0) {
+ clear_bit(BTUSB_BULK_RUNNING, &data->flags);
+ usb_kill_anchored_urbs(&data->bulk_anchor);
+ return;
+ }
+
+ if (!test_and_set_bit(BTUSB_BULK_RUNNING, &data->flags)) {
+ if (btusb_submit_bulk_urb(hdev) < 0)
+ clear_bit(BTUSB_BULK_RUNNING, &data->flags);
+ else
+ btusb_submit_bulk_urb(hdev);
+ }
+}
+
+static int btusb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_endpoint_descriptor *ep_desc;
+ struct btusb_data *data;
+ struct hci_dev *hdev;
+ int i, err;
+
+ BT_DBG("intf %p id %p", intf, id);
+
+ if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+ return -ENODEV;
+
+ if (!id->driver_info) {
+ const struct usb_device_id *match;
+ match = usb_match_id(intf, blacklist_table);
+ if (match)
+ id = match;
+ }
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+ ep_desc = &intf->cur_altsetting->endpoint[i].desc;
+
+ if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
+ data->intr_ep = ep_desc;
+ continue;
+ }
+
+ if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
+ data->bulk_tx_ep = ep_desc;
+ continue;
+ }
+
+ if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
+ data->bulk_rx_ep = ep_desc;
+ continue;
+ }
+ }
+
+ if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
+ kfree(data);
+ return -ENODEV;
+ }
+
+ data->udev = interface_to_usbdev(intf);
+
+ spin_lock_init(&data->lock);
+
+ INIT_WORK(&data->work, btusb_work);
+
+ init_usb_anchor(&data->tx_anchor);
+ init_usb_anchor(&data->intr_anchor);
+ init_usb_anchor(&data->bulk_anchor);
+
+ hdev = hci_alloc_dev();
+ if (!hdev) {
+ kfree(data);
+ return -ENOMEM;
+ }
+
+ hdev->type = HCI_USB;
+ hdev->driver_data = data;
+
+ data->hdev = hdev;
+
+ SET_HCIDEV_DEV(hdev, &intf->dev);
+
+ hdev->open = btusb_open;
+ hdev->close = btusb_close;
+ hdev->flush = btusb_flush;
+ hdev->send = btusb_send_frame;
+ hdev->destruct = btusb_destruct;
+ hdev->notify = btusb_notify;
+
+ hdev->owner = THIS_MODULE;
+
+ set_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks);
+
+ err = hci_register_dev(hdev);
+ if (err < 0) {
+ hci_free_dev(hdev);
+ kfree(data);
+ return err;
+ }
+
+ usb_set_intfdata(intf, data);
+
+ return 0;
+}
+
+static void btusb_disconnect(struct usb_interface *intf)
+{
+ struct btusb_data *data = usb_get_intfdata(intf);
+ struct hci_dev *hdev;
+
+ BT_DBG("intf %p", intf);
+
+ if (!data)
+ return;
+
+ hdev = data->hdev;
+
+ usb_set_intfdata(intf, NULL);
+
+ hci_unregister_dev(hdev);
+
+ hci_free_dev(hdev);
+}
+
+static struct usb_driver btusb_driver = {
+ .name = "btusb",
+ .probe = btusb_probe,
+ .disconnect = btusb_disconnect,
+ .id_table = btusb_table,
+};
+
+static int __init btusb_init(void)
+{
+ BT_INFO("Generic Bluetooth USB driver ver %s", VERSION);
+
+ return usb_register(&btusb_driver);
+}
+
+static void __exit btusb_exit(void)
+{
+ usb_deregister(&btusb_driver);
+}
+
+module_init(btusb_init);
+module_exit(btusb_exit);
+
+MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
+MODULE_DESCRIPTION("Generic Bluetooth USB driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff