text: /*
   * This file is part of wl1271
   *
   * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
   * Copyright (C) 2008-2009 Nokia Corporation
   *
   * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * version 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA
   *
   */
  
  #ifndef __WL1271_RX_H__
  #define __WL1271_RX_H__
  
  #include <linux/bitops.h>
  
  #define WL1271_RX_MAX_RSSI -30
  #define WL1271_RX_MIN_RSSI -95
  
  #define WL1271_RX_ALIGN_TO 4
  #define WL1271_RX_ALIGN(len) (((len) + WL1271_RX_ALIGN_TO - 1) & \
  			     ~(WL1271_RX_ALIGN_TO - 1))
  
  #define SHORT_PREAMBLE_BIT   BIT(0)
  #define OFDM_RATE_BIT        BIT(6)
  #define PBCC_RATE_BIT        BIT(7)
  
  #define PLCP_HEADER_LENGTH 8
  #define RX_DESC_PACKETID_SHIFT 11
  #define RX_MAX_PACKET_ID 3
  
  #define NUM_RX_PKT_DESC_MOD_MASK   7
  #define WL1271_RX_RATE_UNSUPPORTED 0xFF
  
  #define RX_DESC_VALID_FCS         0x0001
  #define RX_DESC_MATCH_RXADDR1     0x0002
  #define RX_DESC_MCAST             0x0004
  #define RX_DESC_STAINTIM          0x0008
  #define RX_DESC_VIRTUAL_BM        0x0010
  #define RX_DESC_BCAST             0x0020
  #define RX_DESC_MATCH_SSID        0x0040
  #define RX_DESC_MATCH_BSSID       0x0080
  #define RX_DESC_ENCRYPTION_MASK   0x0300
  #define RX_DESC_MEASURMENT        0x0400
  #define RX_DESC_SEQNUM_MASK       0x1800
  #define	RX_DESC_MIC_FAIL	  0x2000
  #define	RX_DESC_DECRYPT_FAIL	  0x4000
  
  /*
   * RX Descriptor flags:
   *
   * Bits 0-1 - band
   * Bit  2   - STBC
   * Bit  3   - A-MPDU
   * Bit  4   - HT
   * Bits 5-7 - encryption
   */
  #define WL1271_RX_DESC_BAND_MASK    0x03
  #define WL1271_RX_DESC_ENCRYPT_MASK 0xE0
  
  #define WL1271_RX_DESC_BAND_BG      0x00
  #define WL1271_RX_DESC_BAND_J       0x01
  #define WL1271_RX_DESC_BAND_A       0x02
  
  #define WL1271_RX_DESC_STBC         BIT(2)
  #define WL1271_RX_DESC_A_MPDU       BIT(3)
  #define WL1271_RX_DESC_HT           BIT(4)
  
  #define WL1271_RX_DESC_ENCRYPT_WEP  0x20
  #define WL1271_RX_DESC_ENCRYPT_TKIP 0x40
  #define WL1271_RX_DESC_ENCRYPT_AES  0x60
  #define WL1271_RX_DESC_ENCRYPT_GEM  0x80
  
  /*
   * RX Descriptor status
   *
   * Bits 0-2 - status
   * Bits 3-7 - reserved
   */
  #define WL1271_RX_DESC_STATUS_MASK      0x07
  
  #define WL1271_RX_DESC_SUCCESS          0x00
  #define WL1271_RX_DESC_DECRYPT_FAIL     0x01
  #define WL1271_RX_DESC_MIC_FAIL         0x02
  #define WL1271_RX_DESC_DRIVER_RX_Q_FAIL 0x03
  
  #define RX_MEM_BLOCK_MASK     0xFF
  #define RX_BUF_SIZE_MASK      0xFFF00
  #define RX_BUF_SIZE_SHIFT_DIV 6
  
  struct wl1271_rx_descriptor {
  	u16 length;
  	u8  status;
  	u8  flags;
  	u8  rate;
  	u8  channel;
  	s8  rssi;
  	u8  snr;
  	u32 timestamp;
  	u8  packet_class;
  	u8  process_id;
  	u8  pad_len;
  	u8  reserved;
  } __attribute__ ((packed));
  
  void wl1271_rx(struct wl1271 *wl, struct wl1271_fw_status *status);
  
  #endif
  