109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* This file is part of wl1251
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*
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* Copyright (c) 1998-2007 Texas Instruments Incorporated
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* Copyright (C) 2008 Nokia Corporation
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*/
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#ifndef __WL1251_RX_H__
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#define __WL1251_RX_H__
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#include <linux/bitops.h>
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#include "wl1251.h"
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/*
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* RX PATH
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*
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* The Rx path uses a double buffer and an rx_contro structure, each located
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* at a fixed address in the device memory. The host keeps track of which
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* buffer is available and alternates between them on a per packet basis.
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* The size of each of the two buffers is large enough to hold the longest
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* 802.3 packet.
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* The RX path goes like that:
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* 1) The target generates an interrupt each time a new packet is received.
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* There are 2 RX interrupts, one for each buffer.
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* 2) The host reads the received packet from one of the double buffers.
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* 3) The host triggers a target interrupt.
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* 4) The target prepares the next RX packet.
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*/
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#define WL1251_RX_MAX_RSSI -30
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#define WL1251_RX_MIN_RSSI -95
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#define WL1251_RX_ALIGN_TO 4
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#define WL1251_RX_ALIGN(len) (((len) + WL1251_RX_ALIGN_TO - 1) & \
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~(WL1251_RX_ALIGN_TO - 1))
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#define SHORT_PREAMBLE_BIT BIT(0)
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#define OFDM_RATE_BIT BIT(6)
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#define PBCC_RATE_BIT BIT(7)
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#define PLCP_HEADER_LENGTH 8
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#define RX_DESC_PACKETID_SHIFT 11
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#define RX_MAX_PACKET_ID 3
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#define RX_DESC_VALID_FCS 0x0001
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#define RX_DESC_MATCH_RXADDR1 0x0002
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#define RX_DESC_MCAST 0x0004
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#define RX_DESC_STAINTIM 0x0008
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#define RX_DESC_VIRTUAL_BM 0x0010
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#define RX_DESC_BCAST 0x0020
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#define RX_DESC_MATCH_SSID 0x0040
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#define RX_DESC_MATCH_BSSID 0x0080
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#define RX_DESC_ENCRYPTION_MASK 0x0300
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#define RX_DESC_MEASURMENT 0x0400
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#define RX_DESC_SEQNUM_MASK 0x1800
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#define RX_DESC_MIC_FAIL 0x2000
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#define RX_DESC_DECRYPT_FAIL 0x4000
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struct wl1251_rx_descriptor {
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u32 timestamp; /* In microseconds */
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u16 length; /* Paylod length, including headers */
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u16 flags;
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/*
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* 0 - 802.11
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* 1 - 802.3
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* 2 - IP
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* 3 - Raw Codec
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*/
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u8 type;
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/*
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* Received Rate:
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* 0x0A - 1MBPS
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* 0x14 - 2MBPS
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* 0x37 - 5_5MBPS
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* 0x0B - 6MBPS
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* 0x0F - 9MBPS
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* 0x6E - 11MBPS
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* 0x0A - 12MBPS
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* 0x0E - 18MBPS
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* 0xDC - 22MBPS
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* 0x09 - 24MBPS
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* 0x0D - 36MBPS
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* 0x08 - 48MBPS
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* 0x0C - 54MBPS
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*/
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u8 rate;
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u8 mod_pre; /* Modulation and preamble */
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u8 channel;
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/*
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* 0 - 2.4 Ghz
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* 1 - 5 Ghz
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*/
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u8 band;
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s8 rssi; /* in dB */
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u8 rcpi; /* in dB */
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u8 snr; /* in dB */
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} __packed;
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void wl1251_rx(struct wl1251 *wl);
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#endif
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