drivers/net/wireless/zydas/zd1211rw/zd_mac.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* ZD1211 USB-WLAN driver for Linux
   3  *
   4  * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
   5  * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
   6  */
   7
   8 #ifndef _ZD_MAC_H
   9 #define _ZD_MAC_H
  10
  11 #include <linux/kernel.h>
  12 #include <net/mac80211.h>
  13
  14 #include "zd_chip.h"
  15
  16 struct zd_ctrlset {
  17         u8     modulation;
  18         __le16 tx_length;
  19         u8     control;
  20         /* stores only the difference to tx_length on ZD1211B */
  21         __le16 packet_length;
  22         __le16 current_length;
  23         u8     service;
  24         __le16  next_frame_length;
  25 } __packed;
  26
  27 #define ZD_CS_RESERVED_SIZE     25
  28
  29 /* The field modulation of struct zd_ctrlset controls the bit rate, the use
  30  * of short or long preambles in 802.11b (CCK mode) or the use of 802.11a or
  31  * 802.11g in OFDM mode.
  32  *
  33  * The term zd-rate is used for the combination of the modulation type flag
  34  * and the "pure" rate value.
  35  */
  36 #define ZD_PURE_RATE_MASK       0x0f
  37 #define ZD_MODULATION_TYPE_MASK 0x10
  38 #define ZD_RATE_MASK            (ZD_PURE_RATE_MASK|ZD_MODULATION_TYPE_MASK)
  39 #define ZD_PURE_RATE(modulation) ((modulation) & ZD_PURE_RATE_MASK)
  40 #define ZD_MODULATION_TYPE(modulation) ((modulation) & ZD_MODULATION_TYPE_MASK)
  41 #define ZD_RATE(modulation) ((modulation) & ZD_RATE_MASK)
  42
  43 /* The two possible modulation types. Notify that 802.11b doesn't use the CCK
  44  * codeing for the 1 and 2 MBit/s rate. We stay with the term here to remain
  45  * consistent with uses the term at other places.
  46  */
  47 #define ZD_CCK                  0x00
  48 #define ZD_OFDM                 0x10
  49
  50 /* The ZD1211 firmware uses proprietary encodings of the 802.11b (CCK) rates.
  51  * For OFDM the PLCP rate encodings are used. We combine these "pure" rates
  52  * with the modulation type flag and call the resulting values zd-rates.
  53  */
  54 #define ZD_CCK_RATE_1M          (ZD_CCK|0x00)
  55 #define ZD_CCK_RATE_2M          (ZD_CCK|0x01)
  56 #define ZD_CCK_RATE_5_5M        (ZD_CCK|0x02)
  57 #define ZD_CCK_RATE_11M         (ZD_CCK|0x03)
  58 #define ZD_OFDM_RATE_6M         (ZD_OFDM|ZD_OFDM_PLCP_RATE_6M)
  59 #define ZD_OFDM_RATE_9M         (ZD_OFDM|ZD_OFDM_PLCP_RATE_9M)
  60 #define ZD_OFDM_RATE_12M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_12M)
  61 #define ZD_OFDM_RATE_18M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_18M)
  62 #define ZD_OFDM_RATE_24M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_24M)
  63 #define ZD_OFDM_RATE_36M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_36M)
  64 #define ZD_OFDM_RATE_48M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_48M)
  65 #define ZD_OFDM_RATE_54M        (ZD_OFDM|ZD_OFDM_PLCP_RATE_54M)
  66
  67 /* The bit 5 of the zd_ctrlset modulation field controls the preamble in CCK
  68  * mode or the 802.11a/802.11g selection in OFDM mode.
  69  */
  70 #define ZD_CCK_PREA_LONG        0x00
  71 #define ZD_CCK_PREA_SHORT       0x20
  72 #define ZD_OFDM_MODE_11G        0x00
  73 #define ZD_OFDM_MODE_11A        0x20
  74
  75 /* zd_ctrlset control field */
  76 #define ZD_CS_NEED_RANDOM_BACKOFF       0x01
  77 #define ZD_CS_NO_ACK                    0x02
  78
  79 #define ZD_CS_FRAME_TYPE_MASK           0x0c
  80 #define ZD_CS_DATA_FRAME                0x00
  81 #define ZD_CS_PS_POLL_FRAME             0x04
  82 #define ZD_CS_MANAGEMENT_FRAME          0x08
  83 #define ZD_CS_NO_SEQUENCE_CTL_FRAME     0x0c
  84
  85 #define ZD_CS_WAKE_DESTINATION          0x10
  86 #define ZD_CS_RTS                       0x20
  87 #define ZD_CS_ENCRYPT                   0x40
  88 #define ZD_CS_SELF_CTS                  0x80
  89
  90 /* Incoming frames are prepended by a PLCP header */
  91 #define ZD_PLCP_HEADER_SIZE             5
  92
  93 struct rx_length_info {
  94         __le16 length[3];
  95         __le16 tag;
  96 } __packed;
  97
  98 #define RX_LENGTH_INFO_TAG              0x697e
  99
 100 struct rx_status {
 101         u8 signal_quality_cck;
 102         /* rssi */
 103         u8 signal_strength;
 104         u8 signal_quality_ofdm;
 105         u8 decryption_type;
 106         u8 frame_status;
 107 } __packed;
 108
 109 /* rx_status field decryption_type */
 110 #define ZD_RX_NO_WEP    0
 111 #define ZD_RX_WEP64     1
 112 #define ZD_RX_TKIP      2
 113 #define ZD_RX_AES       4
 114 #define ZD_RX_WEP128    5
 115 #define ZD_RX_WEP256    6
 116
 117 /* rx_status field frame_status */
 118 #define ZD_RX_FRAME_MODULATION_MASK     0x01
 119 #define ZD_RX_CCK                       0x00
 120 #define ZD_RX_OFDM                      0x01
 121
 122 #define ZD_RX_TIMEOUT_ERROR             0x02
 123 #define ZD_RX_FIFO_OVERRUN_ERROR        0x04
 124 #define ZD_RX_DECRYPTION_ERROR          0x08
 125 #define ZD_RX_CRC32_ERROR               0x10
 126 #define ZD_RX_NO_ADDR1_MATCH_ERROR      0x20
 127 #define ZD_RX_CRC16_ERROR               0x40
 128 #define ZD_RX_ERROR                     0x80
 129
 130 struct tx_retry_rate {
 131         int count;      /* number of valid element in rate[] array */
 132         int rate[10];   /* retry rates, described by an index in zd_rates[] */
 133 };
 134
 135 struct tx_status {
 136         u8 type;        /* must always be 0x01 : USB_INT_TYPE */
 137         u8 id;          /* must always be 0xa0 : USB_INT_ID_RETRY_FAILED */
 138         u8 rate;
 139         u8 pad;
 140         u8 mac[ETH_ALEN];
 141         u8 retry;
 142         u8 failure;
 143 } __packed;
 144
 145 enum mac_flags {
 146         MAC_FIXED_CHANNEL = 0x01,
 147 };
 148
 149 struct housekeeping {
 150         struct delayed_work link_led_work;
 151 };
 152
 153 struct beacon {
 154         struct delayed_work watchdog_work;
 155         struct sk_buff *cur_beacon;
 156         unsigned long last_update;
 157         u16 interval;
 158         u8 period;
 159 };
 160
 161 enum zd_device_flags {
 162         ZD_DEVICE_RUNNING,
 163 };
 164
 165 #define ZD_MAC_STATS_BUFFER_SIZE 16
 166
 167 #define ZD_MAC_MAX_ACK_WAITERS 50
 168
 169 struct zd_mac {
 170         struct zd_chip chip;
 171         spinlock_t lock;
 172         spinlock_t intr_lock;
 173         struct ieee80211_hw *hw;
 174         struct ieee80211_vif *vif;
 175         struct housekeeping housekeeping;
 176         struct beacon beacon;
 177         struct work_struct set_rts_cts_work;
 178         struct work_struct process_intr;
 179         struct zd_mc_hash multicast_hash;
 180         u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
 181         u8 regdomain;
 182         u8 default_regdomain;
 183         u8 channel;
 184         int type;
 185         int associated;
 186         unsigned long flags;
 187         struct sk_buff_head ack_wait_queue;
 188         struct ieee80211_channel channels[14];
 189         struct ieee80211_rate rates[12];
 190         struct ieee80211_supported_band band;
 191
 192         /* Short preamble (used for RTS/CTS) */
 193         unsigned int short_preamble:1;
 194
 195         /* whether to pass frames with CRC errors to stack */
 196         unsigned int pass_failed_fcs:1;
 197
 198         /* whether to pass control frames to stack */
 199         unsigned int pass_ctrl:1;
 200
 201         /* whether we have received a 802.11 ACK that is pending */
 202         unsigned int ack_pending:1;
 203
 204         /* signal strength of the last 802.11 ACK received */
 205         int ack_signal;
 206 };
 207
 208 #define ZD_REGDOMAIN_FCC        0x10
 209 #define ZD_REGDOMAIN_IC         0x20
 210 #define ZD_REGDOMAIN_ETSI       0x30
 211 #define ZD_REGDOMAIN_SPAIN      0x31
 212 #define ZD_REGDOMAIN_FRANCE     0x32
 213 #define ZD_REGDOMAIN_JAPAN_2    0x40
 214 #define ZD_REGDOMAIN_JAPAN      0x41
 215 #define ZD_REGDOMAIN_JAPAN_3    0x49
 216
 217 enum {
 218         MIN_CHANNEL24 = 1,
 219         MAX_CHANNEL24 = 14,
 220 };
 221
 222 #define ZD_PLCP_SERVICE_LENGTH_EXTENSION 0x80
 223
 224 struct ofdm_plcp_header {
 225         u8 prefix[3];
 226         __le16 service;
 227 } __packed;
 228
 229 static inline u8 zd_ofdm_plcp_header_rate(const struct ofdm_plcp_header *header)
 230 {
 231         return header->prefix[0] & 0xf;
 232 }
 233
 234 /* The following defines give the encoding of the 4-bit rate field in the
 235  * OFDM (802.11a/802.11g) PLCP header. Notify that these values are used to
 236  * define the zd-rate values for OFDM.
 237  *
 238  * See the struct zd_ctrlset definition in zd_mac.h.
 239  */
 240 #define ZD_OFDM_PLCP_RATE_6M    0xb
 241 #define ZD_OFDM_PLCP_RATE_9M    0xf
 242 #define ZD_OFDM_PLCP_RATE_12M   0xa
 243 #define ZD_OFDM_PLCP_RATE_18M   0xe
 244 #define ZD_OFDM_PLCP_RATE_24M   0x9
 245 #define ZD_OFDM_PLCP_RATE_36M   0xd
 246 #define ZD_OFDM_PLCP_RATE_48M   0x8
 247 #define ZD_OFDM_PLCP_RATE_54M   0xc
 248
 249 struct cck_plcp_header {
 250         u8 signal;
 251         u8 service;
 252         __le16 length;
 253         __le16 crc16;
 254 } __packed;
 255
 256 static inline u8 zd_cck_plcp_header_signal(const struct cck_plcp_header *header)
 257 {
 258         return header->signal;
 259 }
 260
 261 /* These defines give the encodings of the signal field in the 802.11b PLCP
 262  * header. The signal field gives the bit rate of the following packet. Even
 263  * if technically wrong we use CCK here also for the 1 MBit/s and 2 MBit/s
 264  * rate to stay consistent with Zydas and our use of the term.
 265  *
 266  * Notify that these values are *not* used in the zd-rates.
 267  */
 268 #define ZD_CCK_PLCP_SIGNAL_1M   0x0a
 269 #define ZD_CCK_PLCP_SIGNAL_2M   0x14
 270 #define ZD_CCK_PLCP_SIGNAL_5M5  0x37
 271 #define ZD_CCK_PLCP_SIGNAL_11M  0x6e
 272
 273 static inline struct zd_mac *zd_hw_mac(struct ieee80211_hw *hw)
 274 {
 275         return hw->priv;
 276 }
 277
 278 static inline struct zd_mac *zd_chip_to_mac(struct zd_chip *chip)
 279 {
 280         return container_of(chip, struct zd_mac, chip);
 281 }
 282
 283 static inline struct zd_mac *zd_usb_to_mac(struct zd_usb *usb)
 284 {
 285         return zd_chip_to_mac(zd_usb_to_chip(usb));
 286 }
 287
 288 static inline u8 *zd_mac_get_perm_addr(struct zd_mac *mac)
 289 {
 290         return mac->hw->wiphy->perm_addr;
 291 }
 292
 293 #define zd_mac_dev(mac) (zd_chip_dev(&(mac)->chip))
 294
 295 struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf);
 296 void zd_mac_clear(struct zd_mac *mac);
 297
 298 int zd_mac_preinit_hw(struct ieee80211_hw *hw);
 299 int zd_mac_init_hw(struct ieee80211_hw *hw);
 300
 301 int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length);
 302 void zd_mac_tx_failed(struct urb *urb);
 303 void zd_mac_tx_to_dev(struct sk_buff *skb, int error);
 304
 305 int zd_op_start(struct ieee80211_hw *hw);
 306 void zd_op_stop(struct ieee80211_hw *hw);
 307 int zd_restore_settings(struct zd_mac *mac);
 308
 309 #ifdef DEBUG
 310 void zd_dump_rx_status(const struct rx_status *status);
 311 #else
 312 #define zd_dump_rx_status(status)
 313 #endif /* DEBUG */
 314
 315 #endif /* _ZD_MAC_H */