LXR linux/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 */
 112enum wl_rx_buf_align {
 113        WLCORE_RX_BUF_ALIGNED,
 114        WLCORE_RX_BUF_UNALIGNED,
 115        WLCORE_RX_BUF_PADDED,
 116};
 117
 118enum {
 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
 130struct 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
 145int wlcore_rx(struct wl1271 *wl, struct wl_fw_status_1 *status);
 146u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band);
 147int wl1271_rx_filter_enable(struct wl1271 *wl,
 148                            int index, bool enable,
 149                            struct wl12xx_rx_filter *filter);
 150int wl1271_rx_filter_clear_all(struct wl1271 *wl);
 151
 152#endif
 153