328 lines
9 KiB
C
328 lines
9 KiB
C
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/* ZD1211 USB-WLAN driver for Linux
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*
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* Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
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* Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ZD_MAC_H
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#define _ZD_MAC_H
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#include <linux/kernel.h>
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#include <net/mac80211.h>
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#include "zd_chip.h"
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struct zd_ctrlset {
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u8 modulation;
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__le16 tx_length;
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u8 control;
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/* stores only the difference to tx_length on ZD1211B */
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__le16 packet_length;
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__le16 current_length;
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u8 service;
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__le16 next_frame_length;
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} __packed;
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#define ZD_CS_RESERVED_SIZE 25
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/* The field modulation of struct zd_ctrlset controls the bit rate, the use
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* of short or long preambles in 802.11b (CCK mode) or the use of 802.11a or
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* 802.11g in OFDM mode.
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*
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* The term zd-rate is used for the combination of the modulation type flag
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* and the "pure" rate value.
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*/
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#define ZD_PURE_RATE_MASK 0x0f
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#define ZD_MODULATION_TYPE_MASK 0x10
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#define ZD_RATE_MASK (ZD_PURE_RATE_MASK|ZD_MODULATION_TYPE_MASK)
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#define ZD_PURE_RATE(modulation) ((modulation) & ZD_PURE_RATE_MASK)
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#define ZD_MODULATION_TYPE(modulation) ((modulation) & ZD_MODULATION_TYPE_MASK)
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#define ZD_RATE(modulation) ((modulation) & ZD_RATE_MASK)
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/* The two possible modulation types. Notify that 802.11b doesn't use the CCK
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* codeing for the 1 and 2 MBit/s rate. We stay with the term here to remain
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* consistent with uses the term at other places.
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*/
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#define ZD_CCK 0x00
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#define ZD_OFDM 0x10
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/* The ZD1211 firmware uses proprietary encodings of the 802.11b (CCK) rates.
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* For OFDM the PLCP rate encodings are used. We combine these "pure" rates
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* with the modulation type flag and call the resulting values zd-rates.
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*/
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#define ZD_CCK_RATE_1M (ZD_CCK|0x00)
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#define ZD_CCK_RATE_2M (ZD_CCK|0x01)
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#define ZD_CCK_RATE_5_5M (ZD_CCK|0x02)
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#define ZD_CCK_RATE_11M (ZD_CCK|0x03)
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#define ZD_OFDM_RATE_6M (ZD_OFDM|ZD_OFDM_PLCP_RATE_6M)
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#define ZD_OFDM_RATE_9M (ZD_OFDM|ZD_OFDM_PLCP_RATE_9M)
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#define ZD_OFDM_RATE_12M (ZD_OFDM|ZD_OFDM_PLCP_RATE_12M)
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#define ZD_OFDM_RATE_18M (ZD_OFDM|ZD_OFDM_PLCP_RATE_18M)
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#define ZD_OFDM_RATE_24M (ZD_OFDM|ZD_OFDM_PLCP_RATE_24M)
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#define ZD_OFDM_RATE_36M (ZD_OFDM|ZD_OFDM_PLCP_RATE_36M)
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#define ZD_OFDM_RATE_48M (ZD_OFDM|ZD_OFDM_PLCP_RATE_48M)
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#define ZD_OFDM_RATE_54M (ZD_OFDM|ZD_OFDM_PLCP_RATE_54M)
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/* The bit 5 of the zd_ctrlset modulation field controls the preamble in CCK
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* mode or the 802.11a/802.11g selection in OFDM mode.
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*/
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#define ZD_CCK_PREA_LONG 0x00
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#define ZD_CCK_PREA_SHORT 0x20
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#define ZD_OFDM_MODE_11G 0x00
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#define ZD_OFDM_MODE_11A 0x20
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/* zd_ctrlset control field */
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#define ZD_CS_NEED_RANDOM_BACKOFF 0x01
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#define ZD_CS_NO_ACK 0x02
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#define ZD_CS_FRAME_TYPE_MASK 0x0c
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#define ZD_CS_DATA_FRAME 0x00
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#define ZD_CS_PS_POLL_FRAME 0x04
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#define ZD_CS_MANAGEMENT_FRAME 0x08
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#define ZD_CS_NO_SEQUENCE_CTL_FRAME 0x0c
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#define ZD_CS_WAKE_DESTINATION 0x10
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#define ZD_CS_RTS 0x20
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#define ZD_CS_ENCRYPT 0x40
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#define ZD_CS_SELF_CTS 0x80
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/* Incoming frames are prepended by a PLCP header */
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#define ZD_PLCP_HEADER_SIZE 5
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struct rx_length_info {
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__le16 length[3];
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__le16 tag;
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} __packed;
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#define RX_LENGTH_INFO_TAG 0x697e
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struct rx_status {
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u8 signal_quality_cck;
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/* rssi */
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u8 signal_strength;
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u8 signal_quality_ofdm;
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u8 decryption_type;
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u8 frame_status;
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} __packed;
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/* rx_status field decryption_type */
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#define ZD_RX_NO_WEP 0
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#define ZD_RX_WEP64 1
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#define ZD_RX_TKIP 2
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#define ZD_RX_AES 4
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#define ZD_RX_WEP128 5
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#define ZD_RX_WEP256 6
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/* rx_status field frame_status */
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#define ZD_RX_FRAME_MODULATION_MASK 0x01
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#define ZD_RX_CCK 0x00
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#define ZD_RX_OFDM 0x01
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#define ZD_RX_TIMEOUT_ERROR 0x02
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#define ZD_RX_FIFO_OVERRUN_ERROR 0x04
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#define ZD_RX_DECRYPTION_ERROR 0x08
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#define ZD_RX_CRC32_ERROR 0x10
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#define ZD_RX_NO_ADDR1_MATCH_ERROR 0x20
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#define ZD_RX_CRC16_ERROR 0x40
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#define ZD_RX_ERROR 0x80
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struct tx_retry_rate {
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int count; /* number of valid element in rate[] array */
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int rate[10]; /* retry rates, described by an index in zd_rates[] */
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};
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struct tx_status {
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u8 type; /* must always be 0x01 : USB_INT_TYPE */
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u8 id; /* must always be 0xa0 : USB_INT_ID_RETRY_FAILED */
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u8 rate;
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u8 pad;
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u8 mac[ETH_ALEN];
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u8 retry;
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u8 failure;
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} __packed;
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enum mac_flags {
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MAC_FIXED_CHANNEL = 0x01,
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};
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struct housekeeping {
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struct delayed_work link_led_work;
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};
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struct beacon {
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struct delayed_work watchdog_work;
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struct sk_buff *cur_beacon;
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unsigned long last_update;
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u16 interval;
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u8 period;
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};
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enum zd_device_flags {
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ZD_DEVICE_RUNNING,
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};
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#define ZD_MAC_STATS_BUFFER_SIZE 16
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#define ZD_MAC_MAX_ACK_WAITERS 50
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struct zd_mac {
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struct zd_chip chip;
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spinlock_t lock;
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spinlock_t intr_lock;
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struct ieee80211_hw *hw;
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struct ieee80211_vif *vif;
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struct housekeeping housekeeping;
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struct beacon beacon;
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struct work_struct set_rts_cts_work;
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struct work_struct process_intr;
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struct zd_mc_hash multicast_hash;
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u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
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u8 regdomain;
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u8 default_regdomain;
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u8 channel;
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int type;
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int associated;
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unsigned long flags;
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struct sk_buff_head ack_wait_queue;
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struct ieee80211_channel channels[14];
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struct ieee80211_rate rates[12];
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struct ieee80211_supported_band band;
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/* Short preamble (used for RTS/CTS) */
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unsigned int short_preamble:1;
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/* whether to pass frames with CRC errors to stack */
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unsigned int pass_failed_fcs:1;
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/* whether to pass control frames to stack */
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unsigned int pass_ctrl:1;
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/* whether we have received a 802.11 ACK that is pending */
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unsigned int ack_pending:1;
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/* signal strength of the last 802.11 ACK received */
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int ack_signal;
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};
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#define ZD_REGDOMAIN_FCC 0x10
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#define ZD_REGDOMAIN_IC 0x20
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#define ZD_REGDOMAIN_ETSI 0x30
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#define ZD_REGDOMAIN_SPAIN 0x31
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#define ZD_REGDOMAIN_FRANCE 0x32
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#define ZD_REGDOMAIN_JAPAN_2 0x40
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#define ZD_REGDOMAIN_JAPAN 0x41
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#define ZD_REGDOMAIN_JAPAN_3 0x49
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enum {
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MIN_CHANNEL24 = 1,
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MAX_CHANNEL24 = 14,
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};
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#define ZD_PLCP_SERVICE_LENGTH_EXTENSION 0x80
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struct ofdm_plcp_header {
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u8 prefix[3];
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__le16 service;
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} __packed;
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static inline u8 zd_ofdm_plcp_header_rate(const struct ofdm_plcp_header *header)
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{
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return header->prefix[0] & 0xf;
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}
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/* The following defines give the encoding of the 4-bit rate field in the
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* OFDM (802.11a/802.11g) PLCP header. Notify that these values are used to
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* define the zd-rate values for OFDM.
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*
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* See the struct zd_ctrlset definition in zd_mac.h.
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*/
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#define ZD_OFDM_PLCP_RATE_6M 0xb
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#define ZD_OFDM_PLCP_RATE_9M 0xf
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#define ZD_OFDM_PLCP_RATE_12M 0xa
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#define ZD_OFDM_PLCP_RATE_18M 0xe
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#define ZD_OFDM_PLCP_RATE_24M 0x9
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#define ZD_OFDM_PLCP_RATE_36M 0xd
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#define ZD_OFDM_PLCP_RATE_48M 0x8
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#define ZD_OFDM_PLCP_RATE_54M 0xc
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struct cck_plcp_header {
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u8 signal;
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u8 service;
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__le16 length;
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__le16 crc16;
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} __packed;
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static inline u8 zd_cck_plcp_header_signal(const struct cck_plcp_header *header)
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{
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return header->signal;
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}
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/* These defines give the encodings of the signal field in the 802.11b PLCP
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* header. The signal field gives the bit rate of the following packet. Even
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* if technically wrong we use CCK here also for the 1 MBit/s and 2 MBit/s
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* rate to stay consistent with Zydas and our use of the term.
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*
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* Notify that these values are *not* used in the zd-rates.
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*/
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#define ZD_CCK_PLCP_SIGNAL_1M 0x0a
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#define ZD_CCK_PLCP_SIGNAL_2M 0x14
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#define ZD_CCK_PLCP_SIGNAL_5M5 0x37
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#define ZD_CCK_PLCP_SIGNAL_11M 0x6e
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static inline struct zd_mac *zd_hw_mac(struct ieee80211_hw *hw)
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{
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return hw->priv;
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}
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static inline struct zd_mac *zd_chip_to_mac(struct zd_chip *chip)
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{
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return container_of(chip, struct zd_mac, chip);
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}
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static inline struct zd_mac *zd_usb_to_mac(struct zd_usb *usb)
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{
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return zd_chip_to_mac(zd_usb_to_chip(usb));
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}
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static inline u8 *zd_mac_get_perm_addr(struct zd_mac *mac)
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{
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return mac->hw->wiphy->perm_addr;
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}
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#define zd_mac_dev(mac) (zd_chip_dev(&(mac)->chip))
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struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf);
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void zd_mac_clear(struct zd_mac *mac);
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int zd_mac_preinit_hw(struct ieee80211_hw *hw);
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int zd_mac_init_hw(struct ieee80211_hw *hw);
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int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length);
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void zd_mac_tx_failed(struct urb *urb);
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void zd_mac_tx_to_dev(struct sk_buff *skb, int error);
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int zd_op_start(struct ieee80211_hw *hw);
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void zd_op_stop(struct ieee80211_hw *hw);
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int zd_restore_settings(struct zd_mac *mac);
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#ifdef DEBUG
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void zd_dump_rx_status(const struct rx_status *status);
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#else
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#define zd_dump_rx_status(status)
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#endif /* DEBUG */
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#endif /* _ZD_MAC_H */
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