diff options
Diffstat (limited to 'drivers/bluetooth/btusb.c')
| -rw-r--r-- | drivers/bluetooth/btusb.c | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c new file mode 100644 index 000000000000..12e108914f19 --- /dev/null +++ b/drivers/bluetooth/btusb.c @@ -0,0 +1,564 @@ +/* + * + * 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"); |