hci_usb.c
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上传日期:2013-04-10
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- /*
- BlueZ - Bluetooth protocol stack for Linux
- Copyright (C) 2000-2001 Qualcomm Incorporated
- Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License version 2 as
- published by the Free Software Foundation;
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
- IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
- CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
- COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
- SOFTWARE IS DISCLAIMED.
- */
- /*
- * BlueZ HCI USB driver.
- * Based on original USB Bluetooth driver for Linux kernel
- * Copyright (c) 2000 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (c) 2000 Mark Douglas Corner <mcorner@umich.edu>
- *
- * $Id: hci_usb.c,v 1.8 2002/07/18 17:23:09 maxk Exp $
- */
- #define VERSION "2.1"
- #include <linux/config.h>
- #include <linux/module.h>
- #define __KERNEL_SYSCALLS__
- #include <linux/version.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/unistd.h>
- #include <linux/types.h>
- #include <linux/interrupt.h>
- #include <linux/slab.h>
- #include <linux/errno.h>
- #include <linux/string.h>
- #include <linux/skbuff.h>
- #include <linux/kmod.h>
- #include <linux/usb.h>
- #include <net/bluetooth/bluetooth.h>
- #include <net/bluetooth/hci_core.h>
- #include "hci_usb.h"
- #define HCI_MAX_PENDING (HCI_MAX_BULK_RX + HCI_MAX_BULK_TX + 1)
- #ifndef HCI_USB_DEBUG
- #undef BT_DBG
- #define BT_DBG( A... )
- #undef BT_DMP
- #define BT_DMP( A... )
- #endif
- #ifndef CONFIG_BLUEZ_USB_ZERO_PACKET
- #undef USB_ZERO_PACKET
- #define USB_ZERO_PACKET 0
- #endif
- static struct usb_driver hci_usb_driver;
- static struct usb_device_id bluetooth_ids[] = {
- /* Generic Bluetooth USB device */
- { USB_DEVICE_INFO(HCI_DEV_CLASS, HCI_DEV_SUBCLASS, HCI_DEV_PROTOCOL) },
- /* Ericsson with non-standard id */
- { USB_DEVICE(0x0bdb, 0x1002) },
- { } /* Terminating entry */
- };
- MODULE_DEVICE_TABLE (usb, bluetooth_ids);
- static struct usb_device_id ignore_ids[] = {
- /* Broadcom BCM2033 without firmware */
- { USB_DEVICE(0x0a5c, 0x2033) },
- { } /* Terminating entry */
- };
- static void hci_usb_interrupt(struct urb *urb);
- static void hci_usb_rx_complete(struct urb *urb);
- static void hci_usb_tx_complete(struct urb *urb);
- static struct urb *hci_usb_get_completed(struct hci_usb *husb)
- {
- struct sk_buff *skb;
- struct urb *urb = NULL;
- skb = skb_dequeue(&husb->completed_q);
- if (skb) {
- urb = ((struct hci_usb_scb *) skb->cb)->urb;
- kfree_skb(skb);
- }
- BT_DBG("%s urb %p", husb->hdev.name, urb);
- return urb;
- }
- static int hci_usb_enable_intr(struct hci_usb *husb)
- {
- struct urb *urb;
- int pipe, size;
- void *buf;
- BT_DBG("%s", husb->hdev.name);
- if (!(urb = usb_alloc_urb(0)))
- return -ENOMEM;
- if (!(buf = kmalloc(HCI_MAX_EVENT_SIZE, GFP_KERNEL))) {
- usb_free_urb(urb);
- return -ENOMEM;
- }
- husb->intr_urb = urb;
-
- pipe = usb_rcvintpipe(husb->udev, husb->intr_ep);
- size = usb_maxpacket(husb->udev, pipe, usb_pipeout(pipe));
- FILL_INT_URB(urb, husb->udev, pipe, buf, size,
- hci_usb_interrupt, husb, husb->intr_interval);
-
- return usb_submit_urb(urb);
- }
- static int hci_usb_disable_intr(struct hci_usb *husb)
- {
- struct urb *urb = husb->intr_urb;
- struct sk_buff *skb;
- BT_DBG("%s", husb->hdev.name);
- usb_unlink_urb(urb); usb_free_urb(urb);
- husb->intr_urb = NULL;
- skb = husb->intr_skb;
- if (skb) {
- husb->intr_skb = NULL;
- kfree_skb(skb);
- }
- return 0;
- }
- static int hci_usb_rx_submit(struct hci_usb *husb, struct urb *urb)
- {
- struct hci_usb_scb *scb;
- struct sk_buff *skb;
- int pipe, size, err;
- if (!urb && !(urb = usb_alloc_urb(0)))
- return -ENOMEM;
- size = HCI_MAX_FRAME_SIZE;
- if (!(skb = bluez_skb_alloc(size, GFP_ATOMIC))) {
- usb_free_urb(urb);
- return -ENOMEM;
- }
-
- BT_DBG("%s urb %p", husb->hdev.name, urb);
- skb->dev = (void *) &husb->hdev;
- skb->pkt_type = HCI_ACLDATA_PKT;
- scb = (struct hci_usb_scb *) skb->cb;
- scb->urb = urb;
- pipe = usb_rcvbulkpipe(husb->udev, husb->bulk_in_ep);
- FILL_BULK_URB(urb, husb->udev, pipe, skb->data, size, hci_usb_rx_complete, skb);
- urb->transfer_flags = USB_QUEUE_BULK;
- skb_queue_tail(&husb->pending_q, skb);
- err = usb_submit_urb(urb);
- if (err) {
- BT_ERR("%s bulk rx submit failed urb %p err %d",
- husb->hdev.name, urb, err);
- skb_unlink(skb);
- usb_free_urb(urb);
- }
- return err;
- }
- /* Initialize device */
- static int hci_usb_open(struct hci_dev *hdev)
- {
- struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
- int i, err;
- unsigned long flags;
- BT_DBG("%s", hdev->name);
- if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
- return 0;
- MOD_INC_USE_COUNT;
- write_lock_irqsave(&husb->completion_lock, flags);
- err = hci_usb_enable_intr(husb);
- if (!err) {
- for (i = 0; i < HCI_MAX_BULK_TX; i++)
- hci_usb_rx_submit(husb, NULL);
- } else {
- clear_bit(HCI_RUNNING, &hdev->flags);
- MOD_DEC_USE_COUNT;
- }
- write_unlock_irqrestore(&husb->completion_lock, flags);
- return err;
- }
- /* Reset device */
- static int hci_usb_flush(struct hci_dev *hdev)
- {
- struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
- BT_DBG("%s", hdev->name);
- skb_queue_purge(&husb->cmd_q);
- skb_queue_purge(&husb->acl_q);
- return 0;
- }
- static inline void hci_usb_unlink_urbs(struct hci_usb *husb)
- {
- struct sk_buff *skb;
- struct urb *urb;
- BT_DBG("%s", husb->hdev.name);
- while ((skb = skb_dequeue(&husb->pending_q))) {
- urb = ((struct hci_usb_scb *) skb->cb)->urb;
- usb_unlink_urb(urb);
- kfree_skb(skb);
- }
- while ((urb = hci_usb_get_completed(husb)))
- usb_free_urb(urb);
- }
- /* Close device */
- static int hci_usb_close(struct hci_dev *hdev)
- {
- struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
- unsigned long flags;
-
- if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
- return 0;
- BT_DBG("%s", hdev->name);
- write_lock_irqsave(&husb->completion_lock, flags);
-
- hci_usb_disable_intr(husb);
- hci_usb_unlink_urbs(husb);
- hci_usb_flush(hdev);
- write_unlock_irqrestore(&husb->completion_lock, flags);
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static inline int hci_usb_send_ctrl(struct hci_usb *husb, struct sk_buff *skb)
- {
- struct hci_usb_scb *scb = (void *) skb->cb;
- struct urb *urb = hci_usb_get_completed(husb);
- struct usb_ctrlrequest *dr;
- int pipe, err;
- if (!urb && !(urb = usb_alloc_urb(0)))
- return -ENOMEM;
- if (!(dr = kmalloc(sizeof(*dr), GFP_ATOMIC))) {
- usb_free_urb(urb);
- return -ENOMEM;
- }
-
- pipe = usb_sndctrlpipe(husb->udev, 0);
- dr->bRequestType = HCI_CTRL_REQ;
- dr->bRequest = 0;
- dr->wIndex = 0;
- dr->wValue = 0;
- dr->wLength = __cpu_to_le16(skb->len);
- FILL_CONTROL_URB(urb, husb->udev, pipe, (void *) dr,
- skb->data, skb->len, hci_usb_tx_complete, skb);
- BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
- scb->urb = urb;
- skb_queue_tail(&husb->pending_q, skb);
- err = usb_submit_urb(urb);
- if (err) {
- BT_ERR("%s ctrl tx submit failed urb %p err %d",
- husb->hdev.name, urb, err);
- skb_unlink(skb);
- usb_free_urb(urb); kfree(dr);
- }
- return err;
- }
- static inline int hci_usb_send_bulk(struct hci_usb *husb, struct sk_buff *skb)
- {
- struct hci_usb_scb *scb = (void *) skb->cb;
- struct urb *urb = hci_usb_get_completed(husb);
- int pipe, err;
- if (!urb && !(urb = usb_alloc_urb(0)))
- return -ENOMEM;
- pipe = usb_sndbulkpipe(husb->udev, husb->bulk_out_ep);
-
- FILL_BULK_URB(urb, husb->udev, pipe, skb->data, skb->len,
- hci_usb_tx_complete, skb);
- urb->transfer_flags = USB_QUEUE_BULK | USB_ZERO_PACKET;
- BT_DBG("%s urb %p len %d", husb->hdev.name, urb, skb->len);
- scb->urb = urb;
- skb_queue_tail(&husb->pending_q, skb);
- err = usb_submit_urb(urb);
- if (err) {
- BT_ERR("%s bulk tx submit failed urb %p err %d",
- husb->hdev.name, urb, err);
- skb_unlink(skb);
- usb_free_urb(urb);
- }
- return err;
- }
- static void hci_usb_tx_process(struct hci_usb *husb)
- {
- struct sk_buff *skb;
- BT_DBG("%s", husb->hdev.name);
- do {
- clear_bit(HCI_USB_TX_WAKEUP, &husb->state);
-
- /* Process ACL queue */
- while (skb_queue_len(&husb->pending_q) < HCI_MAX_PENDING &&
- (skb = skb_dequeue(&husb->acl_q))) {
- if (hci_usb_send_bulk(husb, skb) < 0) {
- skb_queue_head(&husb->acl_q, skb);
- break;
- }
- }
- /* Process command queue */
- if (!test_bit(HCI_USB_CTRL_TX, &husb->state) &&
- (skb = skb_dequeue(&husb->cmd_q)) != NULL) {
- set_bit(HCI_USB_CTRL_TX, &husb->state);
- if (hci_usb_send_ctrl(husb, skb) < 0) {
- skb_queue_head(&husb->cmd_q, skb);
- clear_bit(HCI_USB_CTRL_TX, &husb->state);
- }
- }
- } while(test_bit(HCI_USB_TX_WAKEUP, &husb->state));
- }
- static inline void hci_usb_tx_wakeup(struct hci_usb *husb)
- {
- /* Serialize TX queue processing to avoid data reordering */
- if (!test_and_set_bit(HCI_USB_TX_PROCESS, &husb->state)) {
- hci_usb_tx_process(husb);
- clear_bit(HCI_USB_TX_PROCESS, &husb->state);
- } else
- set_bit(HCI_USB_TX_WAKEUP, &husb->state);
- }
- /* Send frames from HCI layer */
- int hci_usb_send_frame(struct sk_buff *skb)
- {
- struct hci_dev *hdev = (struct hci_dev *) skb->dev;
- struct hci_usb *husb;
- if (!hdev) {
- BT_ERR("frame for uknown device (hdev=NULL)");
- return -ENODEV;
- }
- if (!test_bit(HCI_RUNNING, &hdev->flags))
- return -EBUSY;
- husb = (struct hci_usb *) hdev->driver_data;
- BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len);
- read_lock(&husb->completion_lock);
- switch (skb->pkt_type) {
- case HCI_COMMAND_PKT:
- skb_queue_tail(&husb->cmd_q, skb);
- hdev->stat.cmd_tx++;
- break;
- case HCI_ACLDATA_PKT:
- skb_queue_tail(&husb->acl_q, skb);
- hdev->stat.acl_tx++;
- break;
- case HCI_SCODATA_PKT:
- default:
- kfree_skb(skb);
- break;
- }
- hci_usb_tx_wakeup(husb);
- read_unlock(&husb->completion_lock);
- return 0;
- }
- static void hci_usb_interrupt(struct urb *urb)
- {
- struct hci_usb *husb = (void *) urb->context;
- struct hci_usb_scb *scb;
- struct sk_buff *skb;
- hci_event_hdr *eh;
- __u8 *data = urb->transfer_buffer;
- int count = urb->actual_length;
- int len = HCI_EVENT_HDR_SIZE;
- BT_DBG("%s urb %p count %d", husb->hdev.name, urb, count);
- if (!test_bit(HCI_RUNNING, &husb->hdev.flags))
- return;
- if (urb->status || !count) {
- BT_DBG("%s intr status %d, count %d",
- husb->hdev.name, urb->status, count);
- return;
- }
- read_lock(&husb->completion_lock);
-
- husb->hdev.stat.byte_rx += count;
- if (!(skb = husb->intr_skb)) {
- /* Start of the frame */
- if (count < HCI_EVENT_HDR_SIZE)
- goto bad_len;
- eh = (hci_event_hdr *) data;
- len = eh->plen + HCI_EVENT_HDR_SIZE;
- if (count > len)
- goto bad_len;
- skb = bluez_skb_alloc(len, GFP_ATOMIC);
- if (!skb) {
- BT_ERR("%s no memory for event packet", husb->hdev.name);
- goto done;
- }
- scb = (void *) skb->cb;
- skb->dev = (void *) &husb->hdev;
- skb->pkt_type = HCI_EVENT_PKT;
- husb->intr_skb = skb;
- scb->intr_len = len;
- } else {
- /* Continuation */
- scb = (void *) skb->cb;
- len = scb->intr_len;
- if (count > len) {
- husb->intr_skb = NULL;
- kfree_skb(skb);
- goto bad_len;
- }
- }
- memcpy(skb_put(skb, count), data, count);
- scb->intr_len -= count;
- if (!scb->intr_len) {
- /* Complete frame */
- husb->intr_skb = NULL;
- hci_recv_frame(skb);
- }
- done:
- read_unlock(&husb->completion_lock);
- return;
- bad_len:
- BT_ERR("%s bad frame len %d expected %d", husb->hdev.name, count, len);
- husb->hdev.stat.err_rx++;
- read_unlock(&husb->completion_lock);
- }
- static void hci_usb_tx_complete(struct urb *urb)
- {
- struct sk_buff *skb = (struct sk_buff *) urb->context;
- struct hci_dev *hdev = (struct hci_dev *) skb->dev;
- struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
- BT_DBG("%s urb %p status %d flags %x", husb->hdev.name, urb,
- urb->status, urb->transfer_flags);
- if (urb->pipe == usb_sndctrlpipe(husb->udev, 0)) {
- kfree(urb->setup_packet);
- clear_bit(HCI_USB_CTRL_TX, &husb->state);
- }
- if (!test_bit(HCI_RUNNING, &hdev->flags))
- return;
- read_lock(&husb->completion_lock);
-
- if (!urb->status)
- husb->hdev.stat.byte_tx += skb->len;
- else
- husb->hdev.stat.err_tx++;
- skb_unlink(skb);
- skb_queue_tail(&husb->completed_q, skb);
- hci_usb_tx_wakeup(husb);
-
- read_unlock(&husb->completion_lock);
- return;
- }
- static void hci_usb_rx_complete(struct urb *urb)
- {
- struct sk_buff *skb = (struct sk_buff *) urb->context;
- struct hci_dev *hdev = (struct hci_dev *) skb->dev;
- struct hci_usb *husb = (struct hci_usb *) hdev->driver_data;
- int status, count = urb->actual_length;
- hci_acl_hdr *ah;
- int dlen, size;
- BT_DBG("%s urb %p status %d count %d flags %x", husb->hdev.name, urb,
- urb->status, count, urb->transfer_flags);
- if (!test_bit(HCI_RUNNING, &hdev->flags))
- return;
- read_lock(&husb->completion_lock);
- if (urb->status || !count)
- goto resubmit;
- husb->hdev.stat.byte_rx += count;
- ah = (hci_acl_hdr *) skb->data;
- dlen = __le16_to_cpu(ah->dlen);
- size = HCI_ACL_HDR_SIZE + dlen;
- /* Verify frame len and completeness */
- if (count != size) {
- BT_ERR("%s corrupted ACL packet: count %d, dlen %d",
- husb->hdev.name, count, dlen);
- bluez_dump("hci_usb", skb->data, count);
- husb->hdev.stat.err_rx++;
- goto resubmit;
- }
- skb_unlink(skb);
- skb_put(skb, count);
- hci_recv_frame(skb);
- hci_usb_rx_submit(husb, urb);
- read_unlock(&husb->completion_lock);
- return;
-
- resubmit:
- urb->dev = husb->udev;
- status = usb_submit_urb(urb);
- BT_DBG("%s URB resubmit status %d", husb->hdev.name, status);
- read_unlock(&husb->completion_lock);
- }
- static void hci_usb_destruct(struct hci_dev *hdev)
- {
- struct hci_usb *husb;
- if (!hdev) return;
- BT_DBG("%s", hdev->name);
- husb = (struct hci_usb *) hdev->driver_data;
- kfree(husb);
- }
- static void *hci_usb_probe(struct usb_device *udev, unsigned int ifnum, const struct usb_device_id *id)
- {
- struct usb_endpoint_descriptor *bulk_out_ep[HCI_MAX_IFACE_NUM];
- struct usb_endpoint_descriptor *isoc_out_ep[HCI_MAX_IFACE_NUM];
- struct usb_endpoint_descriptor *bulk_in_ep[HCI_MAX_IFACE_NUM];
- struct usb_endpoint_descriptor *isoc_in_ep[HCI_MAX_IFACE_NUM];
- struct usb_endpoint_descriptor *intr_in_ep[HCI_MAX_IFACE_NUM];
- struct usb_interface_descriptor *uif;
- struct usb_endpoint_descriptor *ep;
- struct usb_interface *iface, *isoc_iface;
- struct hci_usb *husb;
- struct hci_dev *hdev;
- int i, a, e, size, ifn, isoc_ifnum, isoc_alts;
- BT_DBG("udev %p ifnum %d", udev, ifnum);
- iface = &udev->actconfig->interface[0];
- /* Check our black list */
- if (usb_match_id(udev, iface, ignore_ids))
- return NULL;
- /* Check number of endpoints */
- if (udev->actconfig->interface[ifnum].altsetting[0].bNumEndpoints < 3)
- return NULL;
- memset(bulk_out_ep, 0, sizeof(bulk_out_ep));
- memset(isoc_out_ep, 0, sizeof(isoc_out_ep));
- memset(bulk_in_ep, 0, sizeof(bulk_in_ep));
- memset(isoc_in_ep, 0, sizeof(isoc_in_ep));
- memset(intr_in_ep, 0, sizeof(intr_in_ep));
- size = 0;
- isoc_iface = NULL;
- isoc_alts = isoc_ifnum = 0;
-
- /* Find endpoints that we need */
- ifn = MIN(udev->actconfig->bNumInterfaces, HCI_MAX_IFACE_NUM);
- for (i = 0; i < ifn; i++) {
- iface = &udev->actconfig->interface[i];
- for (a = 0; a < iface->num_altsetting; a++) {
- uif = &iface->altsetting[a];
- for (e = 0; e < uif->bNumEndpoints; e++) {
- ep = &uif->endpoint[e];
- switch (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
- case USB_ENDPOINT_XFER_INT:
- if (ep->bEndpointAddress & USB_DIR_IN)
- intr_in_ep[i] = ep;
- break;
- case USB_ENDPOINT_XFER_BULK:
- if (ep->bEndpointAddress & USB_DIR_IN)
- bulk_in_ep[i] = ep;
- else
- bulk_out_ep[i] = ep;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if (ep->wMaxPacketSize < size)
- break;
- size = ep->wMaxPacketSize;
- isoc_iface = iface;
- isoc_alts = a;
- isoc_ifnum = i;
- if (ep->bEndpointAddress & USB_DIR_IN)
- isoc_in_ep[i] = ep;
- else
- isoc_out_ep[i] = ep;
- break;
- }
- }
- }
- }
- if (!bulk_in_ep[0] || !bulk_out_ep[0] || !intr_in_ep[0]) {
- BT_DBG("Bulk endpoints not found");
- goto done;
- }
- if (!isoc_in_ep[1] || !isoc_out_ep[1]) {
- BT_DBG("Isoc endpoints not found");
- isoc_iface = NULL;
- }
- if (!(husb = kmalloc(sizeof(struct hci_usb), GFP_KERNEL))) {
- BT_ERR("Can't allocate: control structure");
- goto done;
- }
- memset(husb, 0, sizeof(struct hci_usb));
- husb->udev = udev;
- husb->bulk_out_ep = bulk_out_ep[0]->bEndpointAddress;
- husb->bulk_in_ep = bulk_in_ep[0]->bEndpointAddress;
- husb->intr_ep = intr_in_ep[0]->bEndpointAddress;
- husb->intr_interval = intr_in_ep[0]->bInterval;
- if (isoc_iface) {
- if (usb_set_interface(udev, isoc_ifnum, isoc_alts)) {
- BT_ERR("Can't set isoc interface settings");
- isoc_iface = NULL;
- }
- usb_driver_claim_interface(&hci_usb_driver, isoc_iface, husb);
- husb->isoc_iface = isoc_iface;
- husb->isoc_in_ep = isoc_in_ep[1]->bEndpointAddress;
- husb->isoc_out_ep = isoc_in_ep[1]->bEndpointAddress;
- }
- husb->completion_lock = RW_LOCK_UNLOCKED;
-
- skb_queue_head_init(&husb->acl_q);
- skb_queue_head_init(&husb->cmd_q);
- skb_queue_head_init(&husb->pending_q);
- skb_queue_head_init(&husb->completed_q);
- /* Initialize and register HCI device */
- hdev = &husb->hdev;
- hdev->type = HCI_USB;
- hdev->driver_data = husb;
- hdev->open = hci_usb_open;
- hdev->close = hci_usb_close;
- hdev->flush = hci_usb_flush;
- hdev->send = hci_usb_send_frame;
- hdev->destruct = hci_usb_destruct;
- if (hci_register_dev(hdev) < 0) {
- BT_ERR("Can't register HCI device");
- goto probe_error;
- }
- return husb;
- probe_error:
- kfree(husb);
- done:
- return NULL;
- }
- static void hci_usb_disconnect(struct usb_device *udev, void *ptr)
- {
- struct hci_usb *husb = (struct hci_usb *) ptr;
- struct hci_dev *hdev = &husb->hdev;
- if (!husb)
- return;
- BT_DBG("%s", hdev->name);
- hci_usb_close(hdev);
- if (husb->isoc_iface)
- usb_driver_release_interface(&hci_usb_driver, husb->isoc_iface);
- if (hci_unregister_dev(hdev) < 0)
- BT_ERR("Can't unregister HCI device %s", hdev->name);
- }
- static struct usb_driver hci_usb_driver = {
- name: "hci_usb",
- probe: hci_usb_probe,
- disconnect: hci_usb_disconnect,
- id_table: bluetooth_ids,
- };
- int hci_usb_init(void)
- {
- int err;
- BT_INFO("BlueZ HCI USB driver ver %s Copyright (C) 2000,2001 Qualcomm Inc",
- VERSION);
- BT_INFO("Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>");
- if ((err = usb_register(&hci_usb_driver)) < 0)
- BT_ERR("Failed to register HCI USB driver");
- return err;
- }
- void hci_usb_cleanup(void)
- {
- usb_deregister(&hci_usb_driver);
- }
- module_init(hci_usb_init);
- module_exit(hci_usb_cleanup);
- MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>");
- MODULE_DESCRIPTION("BlueZ HCI USB driver ver " VERSION);
- MODULE_LICENSE("GPL");