drivers/net/wireless/zydas/zd1211rw/zd_mac.h - arm/linux - Git at Google

 /* ZD1211 USB-WLAN driver for Linux
  *
  * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
  * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.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, see <http://www.gnu.org/licenses/>.
  */

 #ifndef _ZD_MAC_H
 #define _ZD_MAC_H

 #include <linux/kernel.h>
 #include <net/mac80211.h>

 #include "zd_chip.h"

 struct zd_ctrlset {
 	u8     modulation;
 	__le16 tx_length;
 	u8     control;
 	/* stores only the difference to tx_length on ZD1211B */
 	__le16 packet_length;
 	__le16 current_length;
 	u8     service;
 	__le16  next_frame_length;
 } __packed;

 #define ZD_CS_RESERVED_SIZE	25

 /* The field modulation of struct zd_ctrlset controls the bit rate, the use
  * of short or long preambles in 802.11b (CCK mode) or the use of 802.11a or
  * 802.11g in OFDM mode.
  *
  * The term zd-rate is used for the combination of the modulation type flag
  * and the "pure" rate value.
  */
 #define ZD_PURE_RATE_MASK       0x0f
 #define ZD_MODULATION_TYPE_MASK 0x10
 #define ZD_RATE_MASK            (ZD_PURE_RATE_MASK|ZD_MODULATION_TYPE_MASK)
 #define ZD_PURE_RATE(modulation) ((modulation) & ZD_PURE_RATE_MASK)
 #define ZD_MODULATION_TYPE(modulation) ((modulation) & ZD_MODULATION_TYPE_MASK)
 #define ZD_RATE(modulation) ((modulation) & ZD_RATE_MASK)

 /* The two possible modulation types. Notify that 802.11b doesn't use the CCK
  * codeing for the 1 and 2 MBit/s rate. We stay with the term here to remain
  * consistent with uses the term at other places.
  */
 #define ZD_CCK                  0x00
 #define ZD_OFDM                 0x10

 /* The ZD1211 firmware uses proprietary encodings of the 802.11b (CCK) rates.
  * For OFDM the PLCP rate encodings are used. We combine these "pure" rates
  * with the modulation type flag and call the resulting values zd-rates.
  */
 #define ZD_CCK_RATE_1M          (ZD_CCK|0x00)
 #define ZD_CCK_RATE_2M          (ZD_CCK|0x01)
 #define ZD_CCK_RATE_5_5M        (ZD_CCK|0x02)
 #define ZD_CCK_RATE_11M         (ZD_CCK|0x03)
 #define ZD_OFDM_RATE_6M         (ZD_OFDM|ZD_OFDM_PLCP_RATE_6M)
 #define ZD_OFDM_RATE_9M         (ZD_OFDM|ZD_OFDM_PLCP_RATE_9M)
 #define ZD_OFDM_RATE_12M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_12M)
 #define ZD_OFDM_RATE_18M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_18M)
 #define ZD_OFDM_RATE_24M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_24M)
 #define ZD_OFDM_RATE_36M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_36M)
 #define ZD_OFDM_RATE_48M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_48M)
 #define ZD_OFDM_RATE_54M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_54M)

 /* The bit 5 of the zd_ctrlset modulation field controls the preamble in CCK
  * mode or the 802.11a/802.11g selection in OFDM mode.
  */
 #define ZD_CCK_PREA_LONG        0x00
 #define ZD_CCK_PREA_SHORT       0x20
 #define ZD_OFDM_MODE_11G        0x00
 #define ZD_OFDM_MODE_11A        0x20

 /* zd_ctrlset control field */
 #define ZD_CS_NEED_RANDOM_BACKOFF	0x01
 #define ZD_CS_NO_ACK			0x02

 #define ZD_CS_FRAME_TYPE_MASK		0x0c
 #define ZD_CS_DATA_FRAME		0x00
 #define ZD_CS_PS_POLL_FRAME		0x04
 #define ZD_CS_MANAGEMENT_FRAME		0x08
 #define ZD_CS_NO_SEQUENCE_CTL_FRAME	0x0c

 #define ZD_CS_WAKE_DESTINATION		0x10
 #define ZD_CS_RTS			0x20
 #define ZD_CS_ENCRYPT			0x40
 #define ZD_CS_SELF_CTS			0x80

 /* Incoming frames are prepended by a PLCP header */
 #define ZD_PLCP_HEADER_SIZE		5

 struct rx_length_info {
 	__le16 length[3];
 	__le16 tag;
 } __packed;

 #define RX_LENGTH_INFO_TAG		0x697e

 struct rx_status {
 	u8 signal_quality_cck;
 	/* rssi */
 	u8 signal_strength;
 	u8 signal_quality_ofdm;
 	u8 decryption_type;
 	u8 frame_status;
 } __packed;

 /* rx_status field decryption_type */
 #define ZD_RX_NO_WEP	0
 #define ZD_RX_WEP64	1
 #define ZD_RX_TKIP	2
 #define ZD_RX_AES	4
 #define ZD_RX_WEP128	5
 #define ZD_RX_WEP256	6

 /* rx_status field frame_status */
 #define ZD_RX_FRAME_MODULATION_MASK	0x01
 #define ZD_RX_CCK			0x00
 #define ZD_RX_OFDM			0x01

 #define ZD_RX_TIMEOUT_ERROR		0x02
 #define ZD_RX_FIFO_OVERRUN_ERROR	0x04
 #define ZD_RX_DECRYPTION_ERROR		0x08
 #define ZD_RX_CRC32_ERROR		0x10
 #define ZD_RX_NO_ADDR1_MATCH_ERROR	0x20
 #define ZD_RX_CRC16_ERROR		0x40
 #define ZD_RX_ERROR			0x80

 struct tx_retry_rate {
 	int count;	/* number of valid element in rate[] array */
 	int rate[10];	/* retry rates, described by an index in zd_rates[] */
 };

 struct tx_status {
 	u8 type;	/* must always be 0x01 : USB_INT_TYPE */
 	u8 id;		/* must always be 0xa0 : USB_INT_ID_RETRY_FAILED */
 	u8 rate;
 	u8 pad;
 	u8 mac[ETH_ALEN];
 	u8 retry;
 	u8 failure;
 } __packed;

 enum mac_flags {
 	MAC_FIXED_CHANNEL = 0x01,
 };

 struct housekeeping {
 	struct delayed_work link_led_work;
 };

 struct beacon {
 	struct delayed_work watchdog_work;
 	struct sk_buff *cur_beacon;
 	unsigned long last_update;
 	u16 interval;
 	u8 period;
 };

 enum zd_device_flags {
 	ZD_DEVICE_RUNNING,
 };

 #define ZD_MAC_STATS_BUFFER_SIZE 16

 #define ZD_MAC_MAX_ACK_WAITERS 50

 struct zd_mac {
 	struct zd_chip chip;
 	spinlock_t lock;
 	spinlock_t intr_lock;
 	struct ieee80211_hw *hw;
 	struct ieee80211_vif *vif;
 	struct housekeeping housekeeping;
 	struct beacon beacon;
 	struct work_struct set_rts_cts_work;
 	struct work_struct process_intr;
 	struct zd_mc_hash multicast_hash;
 	u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
 	u8 regdomain;
 	u8 default_regdomain;
 	u8 channel;
 	int type;
 	int associated;
 	unsigned long flags;
 	struct sk_buff_head ack_wait_queue;
 	struct ieee80211_channel channels[14];
 	struct ieee80211_rate rates[12];
 	struct ieee80211_supported_band band;

 	/* Short preamble (used for RTS/CTS) */
 	unsigned int short_preamble:1;

 	/* whether to pass frames with CRC errors to stack */
 	unsigned int pass_failed_fcs:1;

 	/* whether to pass control frames to stack */
 	unsigned int pass_ctrl:1;

 	/* whether we have received a 802.11 ACK that is pending */
 	unsigned int ack_pending:1;

 	/* signal strength of the last 802.11 ACK received */
 	int ack_signal;
 };

 #define ZD_REGDOMAIN_FCC	0x10
 #define ZD_REGDOMAIN_IC		0x20
 #define ZD_REGDOMAIN_ETSI	0x30
 #define ZD_REGDOMAIN_SPAIN	0x31
 #define ZD_REGDOMAIN_FRANCE	0x32
 #define ZD_REGDOMAIN_JAPAN_2	0x40
 #define ZD_REGDOMAIN_JAPAN	0x41
 #define ZD_REGDOMAIN_JAPAN_3	0x49

 enum {
 	MIN_CHANNEL24 = 1,
 	MAX_CHANNEL24 = 14,
 };

 #define ZD_PLCP_SERVICE_LENGTH_EXTENSION 0x80

 struct ofdm_plcp_header {
 	u8 prefix[3];
 	__le16 service;
 } __packed;

 static inline u8 zd_ofdm_plcp_header_rate(const struct ofdm_plcp_header *header)
 {
 	return header->prefix[0] & 0xf;
 }

 /* The following defines give the encoding of the 4-bit rate field in the
  * OFDM (802.11a/802.11g) PLCP header. Notify that these values are used to
  * define the zd-rate values for OFDM.
  *
  * See the struct zd_ctrlset definition in zd_mac.h.
  */
 #define ZD_OFDM_PLCP_RATE_6M	0xb
 #define ZD_OFDM_PLCP_RATE_9M	0xf
 #define ZD_OFDM_PLCP_RATE_12M	0xa
 #define ZD_OFDM_PLCP_RATE_18M	0xe
 #define ZD_OFDM_PLCP_RATE_24M	0x9
 #define ZD_OFDM_PLCP_RATE_36M	0xd
 #define ZD_OFDM_PLCP_RATE_48M	0x8
 #define ZD_OFDM_PLCP_RATE_54M	0xc

 struct cck_plcp_header {
 	u8 signal;
 	u8 service;
 	__le16 length;
 	__le16 crc16;
 } __packed;

 static inline u8 zd_cck_plcp_header_signal(const struct cck_plcp_header *header)
 {
 	return header->signal;
 }

 /* These defines give the encodings of the signal field in the 802.11b PLCP
  * header. The signal field gives the bit rate of the following packet. Even
  * if technically wrong we use CCK here also for the 1 MBit/s and 2 MBit/s
  * rate to stay consistent with Zydas and our use of the term.
  *
  * Notify that these values are *not* used in the zd-rates.
  */
 #define ZD_CCK_PLCP_SIGNAL_1M	0x0a
 #define ZD_CCK_PLCP_SIGNAL_2M	0x14
 #define ZD_CCK_PLCP_SIGNAL_5M5	0x37
 #define ZD_CCK_PLCP_SIGNAL_11M	0x6e

 static inline struct zd_mac *zd_hw_mac(struct ieee80211_hw *hw)
 {
 	return hw->priv;
 }

 static inline struct zd_mac *zd_chip_to_mac(struct zd_chip *chip)
 {
 	return container_of(chip, struct zd_mac, chip);
 }

 static inline struct zd_mac *zd_usb_to_mac(struct zd_usb *usb)
 {
 	return zd_chip_to_mac(zd_usb_to_chip(usb));
 }

 static inline u8 *zd_mac_get_perm_addr(struct zd_mac *mac)
 {
 	return mac->hw->wiphy->perm_addr;
 }

 #define zd_mac_dev(mac) (zd_chip_dev(&(mac)->chip))

 struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf);
 void zd_mac_clear(struct zd_mac *mac);

 int zd_mac_preinit_hw(struct ieee80211_hw *hw);
 int zd_mac_init_hw(struct ieee80211_hw *hw);

 int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length);
 void zd_mac_tx_failed(struct urb *urb);
 void zd_mac_tx_to_dev(struct sk_buff *skb, int error);

 int zd_op_start(struct ieee80211_hw *hw);
 void zd_op_stop(struct ieee80211_hw *hw);
 int zd_restore_settings(struct zd_mac *mac);

 #ifdef DEBUG
 void zd_dump_rx_status(const struct rx_status *status);
 #else
 #define zd_dump_rx_status(status)
 #endif /* DEBUG */

 #endif /* _ZD_MAC_H */
	/* ZD1211 USB-WLAN driver for Linux
	*
	* Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
	* Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.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, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef _ZD_MAC_H
	#define _ZD_MAC_H

	#include <linux/kernel.h>
	#include <net/mac80211.h>

	#include "zd_chip.h"

	struct zd_ctrlset {
	u8 modulation;
	__le16 tx_length;
	u8 control;
	/* stores only the difference to tx_length on ZD1211B */
	__le16 packet_length;
	__le16 current_length;
	u8 service;
	__le16 next_frame_length;
	} __packed;

	#define ZD_CS_RESERVED_SIZE 25

	/* The field modulation of struct zd_ctrlset controls the bit rate, the use
	* of short or long preambles in 802.11b (CCK mode) or the use of 802.11a or
	* 802.11g in OFDM mode.
	*
	* The term zd-rate is used for the combination of the modulation type flag
	* and the "pure" rate value.
	*/
	#define ZD_PURE_RATE_MASK 0x0f
	#define ZD_MODULATION_TYPE_MASK 0x10
	#define ZD_RATE_MASK (ZD_PURE_RATE_MASK\|ZD_MODULATION_TYPE_MASK)
	#define ZD_PURE_RATE(modulation) ((modulation) & ZD_PURE_RATE_MASK)
	#define ZD_MODULATION_TYPE(modulation) ((modulation) & ZD_MODULATION_TYPE_MASK)
	#define ZD_RATE(modulation) ((modulation) & ZD_RATE_MASK)

	/* The two possible modulation types. Notify that 802.11b doesn't use the CCK
	* codeing for the 1 and 2 MBit/s rate. We stay with the term here to remain
	* consistent with uses the term at other places.
	*/
	#define ZD_CCK 0x00
	#define ZD_OFDM 0x10

	/* The ZD1211 firmware uses proprietary encodings of the 802.11b (CCK) rates.
	* For OFDM the PLCP rate encodings are used. We combine these "pure" rates
	* with the modulation type flag and call the resulting values zd-rates.
	*/
	#define ZD_CCK_RATE_1M (ZD_CCK\|0x00)
	#define ZD_CCK_RATE_2M (ZD_CCK\|0x01)
	#define ZD_CCK_RATE_5_5M (ZD_CCK\|0x02)
	#define ZD_CCK_RATE_11M (ZD_CCK\|0x03)
	#define ZD_OFDM_RATE_6M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_6M)
	#define ZD_OFDM_RATE_9M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_9M)
	#define ZD_OFDM_RATE_12M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_12M)
	#define ZD_OFDM_RATE_18M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_18M)
	#define ZD_OFDM_RATE_24M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_24M)
	#define ZD_OFDM_RATE_36M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_36M)
	#define ZD_OFDM_RATE_48M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_48M)
	#define ZD_OFDM_RATE_54M (ZD_OFDM\|ZD_OFDM_PLCP_RATE_54M)

	/* The bit 5 of the zd_ctrlset modulation field controls the preamble in CCK
	* mode or the 802.11a/802.11g selection in OFDM mode.
	*/
	#define ZD_CCK_PREA_LONG 0x00
	#define ZD_CCK_PREA_SHORT 0x20
	#define ZD_OFDM_MODE_11G 0x00
	#define ZD_OFDM_MODE_11A 0x20

	/* zd_ctrlset control field */
	#define ZD_CS_NEED_RANDOM_BACKOFF 0x01
	#define ZD_CS_NO_ACK 0x02

	#define ZD_CS_FRAME_TYPE_MASK 0x0c
	#define ZD_CS_DATA_FRAME 0x00
	#define ZD_CS_PS_POLL_FRAME 0x04
	#define ZD_CS_MANAGEMENT_FRAME 0x08
	#define ZD_CS_NO_SEQUENCE_CTL_FRAME 0x0c

	#define ZD_CS_WAKE_DESTINATION 0x10
	#define ZD_CS_RTS 0x20
	#define ZD_CS_ENCRYPT 0x40
	#define ZD_CS_SELF_CTS 0x80

	/* Incoming frames are prepended by a PLCP header */
	#define ZD_PLCP_HEADER_SIZE 5

	struct rx_length_info {
	__le16 length[3];
	__le16 tag;
	} __packed;

	#define RX_LENGTH_INFO_TAG 0x697e

	struct rx_status {
	u8 signal_quality_cck;
	/* rssi */
	u8 signal_strength;
	u8 signal_quality_ofdm;
	u8 decryption_type;
	u8 frame_status;
	} __packed;

	/* rx_status field decryption_type */
	#define ZD_RX_NO_WEP 0
	#define ZD_RX_WEP64 1
	#define ZD_RX_TKIP 2
	#define ZD_RX_AES 4
	#define ZD_RX_WEP128 5
	#define ZD_RX_WEP256 6

	/* rx_status field frame_status */
	#define ZD_RX_FRAME_MODULATION_MASK 0x01
	#define ZD_RX_CCK 0x00
	#define ZD_RX_OFDM 0x01

	#define ZD_RX_TIMEOUT_ERROR 0x02
	#define ZD_RX_FIFO_OVERRUN_ERROR 0x04
	#define ZD_RX_DECRYPTION_ERROR 0x08
	#define ZD_RX_CRC32_ERROR 0x10
	#define ZD_RX_NO_ADDR1_MATCH_ERROR 0x20
	#define ZD_RX_CRC16_ERROR 0x40
	#define ZD_RX_ERROR 0x80

	struct tx_retry_rate {
	int count; /* number of valid element in rate[] array */
	int rate[10]; /* retry rates, described by an index in zd_rates[] */
	};

	struct tx_status {
	u8 type; /* must always be 0x01 : USB_INT_TYPE */
	u8 id; /* must always be 0xa0 : USB_INT_ID_RETRY_FAILED */
	u8 rate;
	u8 pad;
	u8 mac[ETH_ALEN];
	u8 retry;
	u8 failure;
	} __packed;

	enum mac_flags {
	MAC_FIXED_CHANNEL = 0x01,
	};

	struct housekeeping {
	struct delayed_work link_led_work;
	};

	struct beacon {
	struct delayed_work watchdog_work;
	struct sk_buff *cur_beacon;
	unsigned long last_update;
	u16 interval;
	u8 period;
	};

	enum zd_device_flags {
	ZD_DEVICE_RUNNING,
	};

	#define ZD_MAC_STATS_BUFFER_SIZE 16

	#define ZD_MAC_MAX_ACK_WAITERS 50

	struct zd_mac {
	struct zd_chip chip;
	spinlock_t lock;
	spinlock_t intr_lock;
	struct ieee80211_hw *hw;
	struct ieee80211_vif *vif;
	struct housekeeping housekeeping;
	struct beacon beacon;
	struct work_struct set_rts_cts_work;
	struct work_struct process_intr;
	struct zd_mc_hash multicast_hash;
	u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
	u8 regdomain;
	u8 default_regdomain;
	u8 channel;
	int type;
	int associated;
	unsigned long flags;
	struct sk_buff_head ack_wait_queue;
	struct ieee80211_channel channels[14];
	struct ieee80211_rate rates[12];
	struct ieee80211_supported_band band;

	/* Short preamble (used for RTS/CTS) */
	unsigned int short_preamble:1;

	/* whether to pass frames with CRC errors to stack */
	unsigned int pass_failed_fcs:1;

	/* whether to pass control frames to stack */
	unsigned int pass_ctrl:1;

	/* whether we have received a 802.11 ACK that is pending */
	unsigned int ack_pending:1;

	/* signal strength of the last 802.11 ACK received */
	int ack_signal;
	};

	#define ZD_REGDOMAIN_FCC 0x10
	#define ZD_REGDOMAIN_IC 0x20
	#define ZD_REGDOMAIN_ETSI 0x30
	#define ZD_REGDOMAIN_SPAIN 0x31
	#define ZD_REGDOMAIN_FRANCE 0x32
	#define ZD_REGDOMAIN_JAPAN_2 0x40
	#define ZD_REGDOMAIN_JAPAN 0x41
	#define ZD_REGDOMAIN_JAPAN_3 0x49

	enum {
	MIN_CHANNEL24 = 1,
	MAX_CHANNEL24 = 14,
	};

	#define ZD_PLCP_SERVICE_LENGTH_EXTENSION 0x80

	struct ofdm_plcp_header {
	u8 prefix[3];
	__le16 service;
	} __packed;

	static inline u8 zd_ofdm_plcp_header_rate(const struct ofdm_plcp_header *header)
	{
	return header->prefix[0] & 0xf;
	}

	/* The following defines give the encoding of the 4-bit rate field in the
	* OFDM (802.11a/802.11g) PLCP header. Notify that these values are used to
	* define the zd-rate values for OFDM.
	*
	* See the struct zd_ctrlset definition in zd_mac.h.
	*/
	#define ZD_OFDM_PLCP_RATE_6M 0xb
	#define ZD_OFDM_PLCP_RATE_9M 0xf
	#define ZD_OFDM_PLCP_RATE_12M 0xa
	#define ZD_OFDM_PLCP_RATE_18M 0xe
	#define ZD_OFDM_PLCP_RATE_24M 0x9
	#define ZD_OFDM_PLCP_RATE_36M 0xd
	#define ZD_OFDM_PLCP_RATE_48M 0x8
	#define ZD_OFDM_PLCP_RATE_54M 0xc

	struct cck_plcp_header {
	u8 signal;
	u8 service;
	__le16 length;
	__le16 crc16;
	} __packed;

	static inline u8 zd_cck_plcp_header_signal(const struct cck_plcp_header *header)
	{
	return header->signal;
	}

	/* These defines give the encodings of the signal field in the 802.11b PLCP
	* header. The signal field gives the bit rate of the following packet. Even
	* if technically wrong we use CCK here also for the 1 MBit/s and 2 MBit/s
	* rate to stay consistent with Zydas and our use of the term.
	*
	* Notify that these values are not used in the zd-rates.
	*/
	#define ZD_CCK_PLCP_SIGNAL_1M 0x0a
	#define ZD_CCK_PLCP_SIGNAL_2M 0x14
	#define ZD_CCK_PLCP_SIGNAL_5M5 0x37
	#define ZD_CCK_PLCP_SIGNAL_11M 0x6e

	static inline struct zd_mac zd_hw_mac(struct ieee80211_hw hw)
	{
	return hw->priv;
	}

	static inline struct zd_mac zd_chip_to_mac(struct zd_chip chip)
	{
	return container_of(chip, struct zd_mac, chip);
	}

	static inline struct zd_mac zd_usb_to_mac(struct zd_usb usb)
	{
	return zd_chip_to_mac(zd_usb_to_chip(usb));
	}

	static inline u8 zd_mac_get_perm_addr(struct zd_mac mac)
	{
	return mac->hw->wiphy->perm_addr;
	}

	#define zd_mac_dev(mac) (zd_chip_dev(&(mac)->chip))

	struct ieee80211_hw zd_mac_alloc_hw(struct usb_interface intf);
	void zd_mac_clear(struct zd_mac *mac);

	int zd_mac_preinit_hw(struct ieee80211_hw *hw);
	int zd_mac_init_hw(struct ieee80211_hw *hw);

	int zd_mac_rx(struct ieee80211_hw hw, const u8 buffer, unsigned int length);
	void zd_mac_tx_failed(struct urb *urb);
	void zd_mac_tx_to_dev(struct sk_buff *skb, int error);

	int zd_op_start(struct ieee80211_hw *hw);
	void zd_op_stop(struct ieee80211_hw *hw);
	int zd_restore_settings(struct zd_mac *mac);

	#ifdef DEBUG
	void zd_dump_rx_status(const struct rx_status *status);
	#else
	#define zd_dump_rx_status(status)
	#endif /* DEBUG */

	#endif /* _ZD_MAC_H */