/* * IEEE802.15.4-2003 specification * * Copyright (C) 2007-2012 Siemens AG * * 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. * * 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. * */ #ifndef NET_MAC802154_H #define NET_MAC802154_H #include #include /* General MAC frame format: * 2 bytes: Frame Control * 1 byte: Sequence Number * 20 bytes: Addressing fields * 14 bytes: Auxiliary Security Header */ #define MAC802154_FRAME_HARD_HEADER_LEN (2 + 1 + 20 + 14) /* The following flags are used to indicate changed address settings from * the stack to the hardware. */ /* indicates that the Short Address changed */ #define IEEE802154_AFILT_SADDR_CHANGED 0x00000001 /* indicates that the IEEE Address changed */ #define IEEE802154_AFILT_IEEEADDR_CHANGED 0x00000002 /* indicates that the PAN ID changed */ #define IEEE802154_AFILT_PANID_CHANGED 0x00000004 /* indicates that PAN Coordinator status changed */ #define IEEE802154_AFILT_PANC_CHANGED 0x00000008 struct ieee802154_hw_addr_filt { __le16 pan_id; /* Each independent PAN selects a unique * identifier. This PAN id allows communication * between devices within a network using short * addresses and enables transmissions between * devices across independent networks. */ __le16 short_addr; __le64 ieee_addr; u8 pan_coord; }; struct ieee802154_hw { /* filled by the driver */ int extra_tx_headroom; u32 flags; struct device *parent; /* filled by mac802154 core */ struct ieee802154_hw_addr_filt hw_filt; void *priv; struct wpan_phy *phy; }; /* Checksum is in hardware and is omitted from a packet * * These following flags are used to indicate hardware capabilities to * the stack. Generally, flags here should have their meaning * done in a way that the simplest hardware doesn't need setting * any particular flags. There are some exceptions to this rule, * however, so you are advised to review these flags carefully. */ /* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */ #define IEEE802154_HW_OMIT_CKSUM 0x00000001 /* Indicates that receiver will autorespond with ACK frames. */ #define IEEE802154_HW_AACK 0x00000002 /* Indicates that transceiver will support transmit power setting. */ #define IEEE802154_HW_TXPOWER 0x00000004 /* Indicates that transceiver will support listen before transmit. */ #define IEEE802154_HW_LBT 0x00000008 /* Indicates that transceiver will support cca mode setting. */ #define IEEE802154_HW_CCA_MODE 0x00000010 /* Indicates that transceiver will support cca ed level setting. */ #define IEEE802154_HW_CCA_ED_LEVEL 0x00000020 /* Indicates that transceiver will support csma (max_be, min_be, csma retries) * settings. */ #define IEEE802154_HW_CSMA_PARAMS 0x00000040 /* Indicates that transceiver will support ARET frame retries setting. */ #define IEEE802154_HW_FRAME_RETRIES 0x00000080 /* This groups the most common CSMA support fields into one. */ #define IEEE802154_HW_CSMA (IEEE802154_HW_CCA_MODE | \ IEEE802154_HW_CCA_ED_LEVEL | \ IEEE802154_HW_CSMA_PARAMS | \ IEEE802154_HW_FRAME_RETRIES) /* struct ieee802154_ops - callbacks from mac802154 to the driver * * This structure contains various callbacks that the driver may * handle or, in some cases, must handle, for example to transmit * a frame. * * start: Handler that 802.15.4 module calls for device initialization. * This function is called before the first interface is attached. * * stop: Handler that 802.15.4 module calls for device cleanup. * This function is called after the last interface is removed. * * xmit: Handler that 802.15.4 module calls for each transmitted frame. * skb cntains the buffer starting from the IEEE 802.15.4 header. * The low-level driver should send the frame based on available * configuration. * This function should return zero or negative errno. Called with * pib_lock held. * * ed: Handler that 802.15.4 module calls for Energy Detection. * This function should place the value for detected energy * (usually device-dependant) in the level pointer and return * either zero or negative errno. Called with pib_lock held. * * set_channel: * Set radio for listening on specific channel. * Set the device for listening on specified channel. * Returns either zero, or negative errno. Called with pib_lock held. * * set_hw_addr_filt: * Set radio for listening on specific address. * Set the device for listening on specified address. * Returns either zero, or negative errno. * * set_txpower: * Set radio transmit power in dB. Called with pib_lock held. * Returns either zero, or negative errno. * * set_lbt * Enables or disables listen before talk on the device. Called with * pib_lock held. * Returns either zero, or negative errno. * * set_cca_mode * Sets the CCA mode used by the device. Called with pib_lock held. * Returns either zero, or negative errno. * * set_cca_ed_level * Sets the CCA energy detection threshold in dBm. Called with pib_lock * held. * Returns either zero, or negative errno. * * set_csma_params * Sets the CSMA parameter set for the PHY. Called with pib_lock held. * Returns either zero, or negative errno. * * set_frame_retries * Sets the retransmission attempt limit. Called with pib_lock held. * Returns either zero, or negative errno. */ struct ieee802154_ops { struct module *owner; int (*start)(struct ieee802154_hw *hw); void (*stop)(struct ieee802154_hw *hw); int (*xmit)(struct ieee802154_hw *hw, struct sk_buff *skb); int (*ed)(struct ieee802154_hw *hw, u8 *level); int (*set_channel)(struct ieee802154_hw *hw, int page, int channel); int (*set_hw_addr_filt)(struct ieee802154_hw *hw, struct ieee802154_hw_addr_filt *filt, unsigned long changed); int (*set_txpower)(struct ieee802154_hw *hw, int db); int (*set_lbt)(struct ieee802154_hw *hw, bool on); int (*set_cca_mode)(struct ieee802154_hw *hw, u8 mode); int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 level); int (*set_csma_params)(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries); int (*set_frame_retries)(struct ieee802154_hw *hw, s8 retries); }; /* Basic interface to register ieee802154 hwice */ struct ieee802154_hw * ieee802154_alloc_hw(size_t priv_data_len, struct ieee802154_ops *ops); void ieee802154_free_hw(struct ieee802154_hw *hw); int ieee802154_register_hw(struct ieee802154_hw *hw); void ieee802154_unregister_hw(struct ieee802154_hw *hw); void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi); #endif /* NET_MAC802154_H */