drivers/bluetooth/hci_usb.h

   1 /*
   2    HCI USB driver for Linux Bluetooth protocol stack (BlueZ)
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   5
   6    Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License version 2 as
  10    published by the Free Software Foundation;
  11
  12    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  13    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  15    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  16    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  17    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20
  21    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  22    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  23    SOFTWARE IS DISCLAIMED.
  24 */
  25
  26 /* Class, SubClass, and Protocol codes that describe a Bluetooth device */
  27 #define HCI_DEV_CLASS           0xe0    /* Wireless class */
  28 #define HCI_DEV_SUBCLASS        0x01    /* RF subclass */
  29 #define HCI_DEV_PROTOCOL        0x01    /* Bluetooth programming protocol */
  30
  31 #define HCI_IGNORE              0x01
  32 #define HCI_RESET               0x02
  33 #define HCI_DIGIANSWER          0x04
  34 #define HCI_CSR                 0x08
  35 #define HCI_SNIFFER             0x10
  36 #define HCI_BCM92035            0x20
  37 #define HCI_BROKEN_ISOC         0x40
  38 #define HCI_WRONG_SCO_MTU       0x80
  39
  40 #define HCI_MAX_IFACE_NUM       3
  41
  42 #define HCI_MAX_BULK_TX         4
  43 #define HCI_MAX_BULK_RX         1
  44
  45 #define HCI_MAX_ISOC_RX         2
  46 #define HCI_MAX_ISOC_TX         2
  47
  48 #define HCI_MAX_ISOC_FRAMES     10
  49
  50 struct _urb_queue {
  51         struct list_head head;
  52         spinlock_t       lock;
  53 };
  54
  55 struct _urb {
  56         struct list_head  list;
  57         struct _urb_queue *queue;
  58         int               type;
  59         void              *priv;
  60         struct urb        urb;
  61 };
  62
  63 static inline void _urb_queue_init(struct _urb_queue *q)
  64 {
  65         INIT_LIST_HEAD(&q->head);
  66         spin_lock_init(&q->lock);
  67 }
  68
  69 static inline void _urb_queue_head(struct _urb_queue *q, struct _urb *_urb)
  70 {
  71         unsigned long flags;
  72         spin_lock_irqsave(&q->lock, flags);
  73         /* _urb_unlink needs to know which spinlock to use, thus mb(). */
  74         _urb->queue = q; mb(); list_add(&_urb->list, &q->head);
  75         spin_unlock_irqrestore(&q->lock, flags);
  76 }
  77
  78 static inline void _urb_queue_tail(struct _urb_queue *q, struct _urb *_urb)
  79 {
  80         unsigned long flags;
  81         spin_lock_irqsave(&q->lock, flags);
  82         /* _urb_unlink needs to know which spinlock to use, thus mb(). */
  83         _urb->queue = q; mb(); list_add_tail(&_urb->list, &q->head);
  84         spin_unlock_irqrestore(&q->lock, flags);
  85 }
  86
  87 static inline void _urb_unlink(struct _urb *_urb)
  88 {
  89         struct _urb_queue *q;
  90         unsigned long flags;
  91
  92         mb();
  93         q = _urb->queue;
  94         /* If q is NULL, it will die at easy-to-debug NULL pointer dereference.
  95            No need to BUG(). */
  96         spin_lock_irqsave(&q->lock, flags);
  97         list_del(&_urb->list); _urb->queue = NULL;
  98         spin_unlock_irqrestore(&q->lock, flags);
  99 }
 100
 101 struct hci_usb {
 102         struct hci_dev          *hdev;
 103
 104         unsigned long           state;
 105
 106         struct usb_device       *udev;
 107
 108         struct usb_host_endpoint        *bulk_in_ep;
 109         struct usb_host_endpoint        *bulk_out_ep;
 110         struct usb_host_endpoint        *intr_in_ep;
 111
 112         struct usb_interface            *isoc_iface;
 113         struct usb_host_endpoint        *isoc_out_ep;
 114         struct usb_host_endpoint        *isoc_in_ep;
 115
 116         __u8                    ctrl_req;
 117
 118         struct sk_buff_head     transmit_q[4];
 119
 120         rwlock_t                completion_lock;
 121
 122         atomic_t                pending_tx[4];          /* Number of pending requests */
 123         struct _urb_queue       pending_q[4];           /* Pending requests */
 124         struct _urb_queue       completed_q[4];         /* Completed requests */
 125 };
 126
 127 /* States  */
 128 #define HCI_USB_TX_PROCESS      1
 129 #define HCI_USB_TX_WAKEUP       2