include/net/mac802154.h

   1 /*
   2  * IEEE802.15.4-2003 specification
   3  *
   4  * Copyright (C) 2007-2012 Siemens AG
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 #ifndef NET_MAC802154_H
  20 #define NET_MAC802154_H
  21
  22 #include <net/af_ieee802154.h>
  23
  24 /* General MAC frame format:
  25  *  2 bytes: Frame Control
  26  *  1 byte:  Sequence Number
  27  * 20 bytes: Addressing fields
  28  * 14 bytes: Auxiliary Security Header
  29  */
  30 #define MAC802154_FRAME_HARD_HEADER_LEN         (2 + 1 + 20 + 14)
  31
  32 /* The following flags are used to indicate changed address settings from
  33  * the stack to the hardware.
  34  */
  35
  36 /* indicates that the Short Address changed */
  37 #define IEEE802515_AFILT_SADDR_CHANGED          0x00000001
  38 /* indicates that the IEEE Address changed */
  39 #define IEEE802515_AFILT_IEEEADDR_CHANGED       0x00000002
  40 /* indicates that the PAN ID changed */
  41 #define IEEE802515_AFILT_PANID_CHANGED          0x00000004
  42 /* indicates that PAN Coordinator status changed */
  43 #define IEEE802515_AFILT_PANC_CHANGED           0x00000008
  44
  45 struct ieee802154_hw_addr_filt {
  46         __le16  pan_id;         /* Each independent PAN selects a unique
  47                                  * identifier. This PAN id allows communication
  48                                  * between devices within a network using short
  49                                  * addresses and enables transmissions between
  50                                  * devices across independent networks.
  51                                  */
  52         __le16  short_addr;
  53         u8      ieee_addr[IEEE802154_ADDR_LEN];
  54         u8      pan_coord;
  55 };
  56
  57 struct ieee802154_dev {
  58         /* filled by the driver */
  59         int     extra_tx_headroom;
  60         u32     flags;
  61         struct  device *parent;
  62
  63         /* filled by mac802154 core */
  64         struct  ieee802154_hw_addr_filt hw_filt;
  65         void    *priv;
  66         struct  wpan_phy *phy;
  67 };
  68
  69 /* Checksum is in hardware and is omitted from a packet
  70  *
  71  * These following flags are used to indicate hardware capabilities to
  72  * the stack. Generally, flags here should have their meaning
  73  * done in a way that the simplest hardware doesn't need setting
  74  * any particular flags. There are some exceptions to this rule,
  75  * however, so you are advised to review these flags carefully.
  76  */
  77
  78 /* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
  79 #define IEEE802154_HW_OMIT_CKSUM        0x00000001
  80 /* Indicates that receiver will autorespond with ACK frames. */
  81 #define IEEE802154_HW_AACK              0x00000002
  82
  83 /* struct ieee802154_ops - callbacks from mac802154 to the driver
  84  *
  85  * This structure contains various callbacks that the driver may
  86  * handle or, in some cases, must handle, for example to transmit
  87  * a frame.
  88  *
  89  * start: Handler that 802.15.4 module calls for device initialization.
  90  *        This function is called before the first interface is attached.
  91  *
  92  * stop:  Handler that 802.15.4 module calls for device cleanup.
  93  *        This function is called after the last interface is removed.
  94  *
  95  * xmit:  Handler that 802.15.4 module calls for each transmitted frame.
  96  *        skb cntains the buffer starting from the IEEE 802.15.4 header.
  97  *        The low-level driver should send the frame based on available
  98  *        configuration.
  99  *        This function should return zero or negative errno. Called with
 100  *        pib_lock held.
 101  *
 102  * ed:    Handler that 802.15.4 module calls for Energy Detection.
 103  *        This function should place the value for detected energy
 104  *        (usually device-dependant) in the level pointer and return
 105  *        either zero or negative errno. Called with pib_lock held.
 106  *
 107  * set_channel:
 108  *        Set radio for listening on specific channel.
 109  *        Set the device for listening on specified channel.
 110  *        Returns either zero, or negative errno. Called with pib_lock held.
 111  *
 112  * set_hw_addr_filt:
 113  *        Set radio for listening on specific address.
 114  *        Set the device for listening on specified address.
 115  *        Returns either zero, or negative errno.
 116  */
 117 struct ieee802154_ops {
 118         struct module   *owner;
 119         int             (*start)(struct ieee802154_dev *dev);
 120         void            (*stop)(struct ieee802154_dev *dev);
 121         int             (*xmit)(struct ieee802154_dev *dev,
 122                                 struct sk_buff *skb);
 123         int             (*ed)(struct ieee802154_dev *dev, u8 *level);
 124         int             (*set_channel)(struct ieee802154_dev *dev,
 125                                        int page,
 126                                        int channel);
 127         int             (*set_hw_addr_filt)(struct ieee802154_dev *dev,
 128                                           struct ieee802154_hw_addr_filt *filt,
 129                                             unsigned long changed);
 130         int             (*ieee_addr)(struct ieee802154_dev *dev,
 131                                      u8 addr[IEEE802154_ADDR_LEN]);
 132 };
 133
 134 /* Basic interface to register ieee802154 device */
 135 struct ieee802154_dev *
 136 ieee802154_alloc_device(size_t priv_data_len, struct ieee802154_ops *ops);
 137 void ieee802154_free_device(struct ieee802154_dev *dev);
 138 int ieee802154_register_device(struct ieee802154_dev *dev);
 139 void ieee802154_unregister_device(struct ieee802154_dev *dev);
 140
 141 void ieee802154_rx_irqsafe(struct ieee802154_dev *dev, struct sk_buff *skb,
 142                            u8 lqi);
 143
 144 #endif /* NET_MAC802154_H */