drivers/net/wireless/wl12xx/rx.h

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
   5  * Copyright (C) 2008-2009 Nokia Corporation
   6  *
   7  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 #ifndef __RX_H__
  26 #define __RX_H__
  27
  28 #include <linux/bitops.h>
  29
  30 #define WL1271_RX_MAX_RSSI -30
  31 #define WL1271_RX_MIN_RSSI -95
  32
  33 #define SHORT_PREAMBLE_BIT   BIT(0)
  34 #define OFDM_RATE_BIT        BIT(6)
  35 #define PBCC_RATE_BIT        BIT(7)
  36
  37 #define PLCP_HEADER_LENGTH 8
  38 #define RX_DESC_PACKETID_SHIFT 11
  39 #define RX_MAX_PACKET_ID 3
  40
  41 #define NUM_RX_PKT_DESC_MOD_MASK   7
  42
  43 #define RX_DESC_VALID_FCS         0x0001
  44 #define RX_DESC_MATCH_RXADDR1     0x0002
  45 #define RX_DESC_MCAST             0x0004
  46 #define RX_DESC_STAINTIM          0x0008
  47 #define RX_DESC_VIRTUAL_BM        0x0010
  48 #define RX_DESC_BCAST             0x0020
  49 #define RX_DESC_MATCH_SSID        0x0040
  50 #define RX_DESC_MATCH_BSSID       0x0080
  51 #define RX_DESC_ENCRYPTION_MASK   0x0300
  52 #define RX_DESC_MEASURMENT        0x0400
  53 #define RX_DESC_SEQNUM_MASK       0x1800
  54 #define RX_DESC_MIC_FAIL          0x2000
  55 #define RX_DESC_DECRYPT_FAIL      0x4000
  56
  57 /*
  58  * RX Descriptor flags:
  59  *
  60  * Bits 0-1 - band
  61  * Bit  2   - STBC
  62  * Bit  3   - A-MPDU
  63  * Bit  4   - HT
  64  * Bits 5-7 - encryption
  65  */
  66 #define WL1271_RX_DESC_BAND_MASK    0x03
  67 #define WL1271_RX_DESC_ENCRYPT_MASK 0xE0
  68
  69 #define WL1271_RX_DESC_BAND_BG      0x00
  70 #define WL1271_RX_DESC_BAND_J       0x01
  71 #define WL1271_RX_DESC_BAND_A       0x02
  72
  73 #define WL1271_RX_DESC_STBC         BIT(2)
  74 #define WL1271_RX_DESC_A_MPDU       BIT(3)
  75 #define WL1271_RX_DESC_HT           BIT(4)
  76
  77 #define WL1271_RX_DESC_ENCRYPT_WEP  0x20
  78 #define WL1271_RX_DESC_ENCRYPT_TKIP 0x40
  79 #define WL1271_RX_DESC_ENCRYPT_AES  0x60
  80 #define WL1271_RX_DESC_ENCRYPT_GEM  0x80
  81
  82 /*
  83  * RX Descriptor status
  84  *
  85  * Bits 0-2 - error code
  86  * Bits 3-5 - process_id tag (AP mode FW)
  87  * Bits 6-7 - reserved
  88  */
  89 #define WL1271_RX_DESC_STATUS_MASK      0x03
  90
  91 #define WL1271_RX_DESC_SUCCESS          0x00
  92 #define WL1271_RX_DESC_DECRYPT_FAIL     0x01
  93 #define WL1271_RX_DESC_MIC_FAIL         0x02
  94 #define WL1271_RX_DESC_DRIVER_RX_Q_FAIL 0x03
  95
  96 #define RX_MEM_BLOCK_MASK            0xFF
  97 #define RX_BUF_SIZE_MASK             0xFFF00
  98 #define RX_BUF_SIZE_SHIFT_DIV        6
  99 /* If set, the start of IP payload is not 4 bytes aligned */
 100 #define RX_BUF_UNALIGNED_PAYLOAD     BIT(20)
 101
 102 enum {
 103         WL12XX_RX_CLASS_UNKNOWN,
 104         WL12XX_RX_CLASS_MANAGEMENT,
 105         WL12XX_RX_CLASS_DATA,
 106         WL12XX_RX_CLASS_QOS_DATA,
 107         WL12XX_RX_CLASS_BCN_PRBRSP,
 108         WL12XX_RX_CLASS_EAPOL,
 109         WL12XX_RX_CLASS_BA_EVENT,
 110         WL12XX_RX_CLASS_AMSDU,
 111         WL12XX_RX_CLASS_LOGGER,
 112 };
 113
 114 struct wl1271_rx_descriptor {
 115         __le16 length;
 116         u8  status;
 117         u8  flags;
 118         u8  rate;
 119         u8  channel;
 120         s8  rssi;
 121         u8  snr;
 122         __le32 timestamp;
 123         u8  packet_class;
 124         u8  hlid;
 125         u8  pad_len;
 126         u8  reserved;
 127 } __packed;
 128
 129 void wl12xx_rx(struct wl1271 *wl, struct wl12xx_fw_status *status);
 130 u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band);
 131
 132 #endif