2
* This file is part of wl1251
4
* Copyright (c) 1998-2007 Texas Instruments Incorporated
5
* Copyright (C) 2008 Nokia Corporation
7
* This program is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU General Public License
9
* version 2 as published by the Free Software Foundation.
11
* This program is distributed in the hope that it will be useful, but
12
* WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14
* General Public License for more details.
16
* You should have received a copy of the GNU General Public License
17
* along with this program; if not, write to the Free Software
18
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23
#ifndef __WL1251_RX_H__
24
#define __WL1251_RX_H__
26
#include <linux/bitops.h>
33
* The Rx path uses a double buffer and an rx_contro structure, each located
34
* at a fixed address in the device memory. The host keeps track of which
35
* buffer is available and alternates between them on a per packet basis.
36
* The size of each of the two buffers is large enough to hold the longest
38
* The RX path goes like that:
39
* 1) The target generates an interrupt each time a new packet is received.
40
* There are 2 RX interrupts, one for each buffer.
41
* 2) The host reads the received packet from one of the double buffers.
42
* 3) The host triggers a target interrupt.
43
* 4) The target prepares the next RX packet.
46
#define WL1251_RX_MAX_RSSI -30
47
#define WL1251_RX_MIN_RSSI -95
49
#define WL1251_RX_ALIGN_TO 4
50
#define WL1251_RX_ALIGN(len) (((len) + WL1251_RX_ALIGN_TO - 1) & \
51
~(WL1251_RX_ALIGN_TO - 1))
53
#define SHORT_PREAMBLE_BIT BIT(0)
54
#define OFDM_RATE_BIT BIT(6)
55
#define PBCC_RATE_BIT BIT(7)
57
#define PLCP_HEADER_LENGTH 8
58
#define RX_DESC_PACKETID_SHIFT 11
59
#define RX_MAX_PACKET_ID 3
61
#define RX_DESC_VALID_FCS 0x0001
62
#define RX_DESC_MATCH_RXADDR1 0x0002
63
#define RX_DESC_MCAST 0x0004
64
#define RX_DESC_STAINTIM 0x0008
65
#define RX_DESC_VIRTUAL_BM 0x0010
66
#define RX_DESC_BCAST 0x0020
67
#define RX_DESC_MATCH_SSID 0x0040
68
#define RX_DESC_MATCH_BSSID 0x0080
69
#define RX_DESC_ENCRYPTION_MASK 0x0300
70
#define RX_DESC_MEASURMENT 0x0400
71
#define RX_DESC_SEQNUM_MASK 0x1800
72
#define RX_DESC_MIC_FAIL 0x2000
73
#define RX_DESC_DECRYPT_FAIL 0x4000
75
struct wl1251_rx_descriptor {
76
u32 timestamp; /* In microseconds */
77
u16 length; /* Paylod length, including headers */
106
u8 mod_pre; /* Modulation and preamble */
120
void wl1251_rx(struct wl1251 *wl);