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linux/drivers/net/wireless/zd1211rw/zd_mac.h
Luis Carlos Cobo 72e77a8a79 zd1211rw: support for mesh interface and beaconing 
The previously unused CR_CAM_MODE register is set to MODE_AP_WDS. This makes the
driver ack mesh (WDS) frames. It does not affect Infra functionality of the
driver.

Previously missing beaconing support has been added. This might also help
implement a currently missing ah-hoc mode.

Support for interrupts from the device have been added, but we are not handling
most of them.

Mesh interfaces are considered associated as long as the interface is up.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-03-06 17:19:47 -05:00

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/* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _ZD_MAC_H
#define _ZD_MAC_H
#include <linux/kernel.h>
#include <net/mac80211.h>
#include "zd_chip.h"
#include "zd_ieee80211.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;
} __attribute__((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_MULTICAST 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;
} __attribute__((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;
} __attribute__((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
enum mac_flags {
MAC_FIXED_CHANNEL = 0x01,
};
struct housekeeping {
struct delayed_work link_led_work;
};
/**
* struct zd_tx_skb_control_block - control block for tx skbuffs
* @control: &struct ieee80211_tx_control pointer
* @context: context pointer
*
* This structure is used to fill the cb field in an &sk_buff to transmit.
* The control field is NULL, if there is no requirement from the mac80211
* stack to report about the packet ACK. This is the case if the flag
* IEEE80211_TXCTL_NO_ACK is not set in &struct ieee80211_tx_control.
*/
struct zd_tx_skb_control_block {
struct ieee80211_tx_control *control;
struct ieee80211_hw *hw;
void *context;
};
#define ZD_MAC_STATS_BUFFER_SIZE 16
#define ZD_MAC_MAX_ACK_WAITERS 10
struct zd_mac {
struct zd_chip chip;
spinlock_t lock;
spinlock_t intr_lock;
struct ieee80211_hw *hw;
struct housekeeping housekeeping;
struct work_struct set_multicast_hash_work;
struct work_struct set_rts_cts_work;
struct work_struct set_rx_filter_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;
int type;
int associated;
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;
/* flags to indicate update in progress */
unsigned int updating_rts_rate: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;
};
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 ieee80211_hw *hw);
void zd_mac_tx_to_dev(struct sk_buff *skb, int error);
#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 */
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