kernel/drivers/net/wireless/ti/wlcore/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 RX_DESC_VALID_FCS         0x0001
  42 #define RX_DESC_MATCH_RXADDR1     0x0002
  43 #define RX_DESC_MCAST             0x0004
  44 #define RX_DESC_STAINTIM          0x0008
  45 #define RX_DESC_VIRTUAL_BM        0x0010
  46 #define RX_DESC_BCAST             0x0020
  47 #define RX_DESC_MATCH_SSID        0x0040
  48 #define RX_DESC_MATCH_BSSID       0x0080
  49 #define RX_DESC_ENCRYPTION_MASK   0x0300
  50 #define RX_DESC_MEASURMENT        0x0400
  51 #define RX_DESC_SEQNUM_MASK       0x1800
  52 #define RX_DESC_MIC_FAIL          0x2000
  53 #define RX_DESC_DECRYPT_FAIL      0x4000
  54
  55 /*
  56  * RX Descriptor flags:
  57  *
  58  * Bits 0-1 - band
  59  * Bit  2   - STBC
  60  * Bit  3   - A-MPDU
  61  * Bit  4   - HT
  62  * Bits 5-7 - encryption
  63  */
  64 #define WL1271_RX_DESC_BAND_MASK    0x03
  65 #define WL1271_RX_DESC_ENCRYPT_MASK 0xE0
  66
  67 #define WL1271_RX_DESC_BAND_BG      0x00
  68 #define WL1271_RX_DESC_BAND_J       0x01
  69 #define WL1271_RX_DESC_BAND_A       0x02
  70
  71 #define WL1271_RX_DESC_STBC         BIT(2)
  72 #define WL1271_RX_DESC_A_MPDU       BIT(3)
  73 #define WL1271_RX_DESC_HT           BIT(4)
  74
  75 #define WL1271_RX_DESC_ENCRYPT_WEP  0x20
  76 #define WL1271_RX_DESC_ENCRYPT_TKIP 0x40
  77 #define WL1271_RX_DESC_ENCRYPT_AES  0x60
  78 #define WL1271_RX_DESC_ENCRYPT_GEM  0x80
  79
  80 /*
  81  * RX Descriptor status
  82  *
  83  * Bits 0-2 - error code
  84  * Bits 3-5 - process_id tag (AP mode FW)
  85  * Bits 6-7 - reserved
  86  */
  87 #define WL1271_RX_DESC_STATUS_MASK      0x07
  88
  89 #define WL1271_RX_DESC_SUCCESS          0x00
  90 #define WL1271_RX_DESC_DECRYPT_FAIL     0x01
  91 #define WL1271_RX_DESC_MIC_FAIL         0x02
  92
  93 #define RX_MEM_BLOCK_MASK            0xFF
  94 #define RX_BUF_SIZE_MASK             0xFFF00
  95 #define RX_BUF_SIZE_SHIFT_DIV        6
  96 #define ALIGNED_RX_BUF_SIZE_MASK     0xFFFF00
  97 #define ALIGNED_RX_BUF_SIZE_SHIFT    8
  98
  99 /* If set, the start of IP payload is not 4 bytes aligned */
 100 #define RX_BUF_UNALIGNED_PAYLOAD     BIT(20)
 101
 102 /* If set, the buffer was padded by the FW to be 4 bytes aligned */
 103 #define RX_BUF_PADDED_PAYLOAD        BIT(30)
 104
 105 /*
 106  * Account for the padding inserted by the FW in case of RX_ALIGNMENT
 107  * or for fixing alignment in case the packet wasn't aligned.
 108  */
 109 #define RX_BUF_ALIGN                 2
 110
 111 /* Describes the alignment state of a Rx buffer */
 112 enum wl_rx_buf_align {
 113         WLCORE_RX_BUF_ALIGNED,
 114         WLCORE_RX_BUF_UNALIGNED,
 115         WLCORE_RX_BUF_PADDED,
 116 };
 117
 118 enum {
 119         WL12XX_RX_CLASS_UNKNOWN,
 120         WL12XX_RX_CLASS_MANAGEMENT,
 121         WL12XX_RX_CLASS_DATA,
 122         WL12XX_RX_CLASS_QOS_DATA,
 123         WL12XX_RX_CLASS_BCN_PRBRSP,
 124         WL12XX_RX_CLASS_EAPOL,
 125         WL12XX_RX_CLASS_BA_EVENT,
 126         WL12XX_RX_CLASS_AMSDU,
 127         WL12XX_RX_CLASS_LOGGER,
 128 };
 129
 130 struct wl1271_rx_descriptor {
 131         __le16 length;
 132         u8  status;
 133         u8  flags;
 134         u8  rate;
 135         u8  channel;
 136         s8  rssi;
 137         u8  snr;
 138         __le32 timestamp;
 139         u8  packet_class;
 140         u8  hlid;
 141         u8  pad_len;
 142         u8  reserved;
 143 } __packed;
 144
 145 int wlcore_rx(struct wl1271 *wl, struct wl_fw_status *status);
 146 u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band);
 147 int wl1271_rx_filter_enable(struct wl1271 *wl,
 148                             int index, bool enable,
 149                             struct wl12xx_rx_filter *filter);
 150 int wl1271_rx_filter_clear_all(struct wl1271 *wl);
 151
 152 #endif