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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* This file is part of wl1251
*
* Copyright (c) 1998-2007 Texas Instruments Incorporated
* Copyright (C) 2008 Nokia Corporation
*/
#ifndef __WL1251_RX_H__
#define __WL1251_RX_H__
#include <linux/bitops.h>
#include "wl1251.h"
/*
* RX PATH
*
* The Rx path uses a double buffer and an rx_contro structure, each located
* at a fixed address in the device memory. The host keeps track of which
* buffer is available and alternates between them on a per packet basis.
* The size of each of the two buffers is large enough to hold the longest
* 802.3 packet.
* The RX path goes like that:
* 1) The target generates an interrupt each time a new packet is received.
* There are 2 RX interrupts, one for each buffer.
* 2) The host reads the received packet from one of the double buffers.
* 3) The host triggers a target interrupt.
* 4) The target prepares the next RX packet.
*/
#define WL1251_RX_MAX_RSSI -30
#define WL1251_RX_MIN_RSSI -95
#define WL1251_RX_ALIGN_TO 4
#define WL1251_RX_ALIGN(len) (((len) + WL1251_RX_ALIGN_TO - 1) & \
~(WL1251_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 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
struct wl1251_rx_descriptor {
u32 timestamp; /* In microseconds */
u16 length; /* Paylod length, including headers */
u16 flags;
/*
* 0 - 802.11
* 1 - 802.3
* 2 - IP
* 3 - Raw Codec
*/
u8 type;
/*
* Received Rate:
* 0x0A - 1MBPS
* 0x14 - 2MBPS
* 0x37 - 5_5MBPS
* 0x0B - 6MBPS
* 0x0F - 9MBPS
* 0x6E - 11MBPS
* 0x0A - 12MBPS
* 0x0E - 18MBPS
* 0xDC - 22MBPS
* 0x09 - 24MBPS
* 0x0D - 36MBPS
* 0x08 - 48MBPS
* 0x0C - 54MBPS
*/
u8 rate;
u8 mod_pre; /* Modulation and preamble */
u8 channel;
/*
* 0 - 2.4 Ghz
* 1 - 5 Ghz
*/
u8 band;
s8 rssi; /* in dB */
u8 rcpi; /* in dB */
u8 snr; /* in dB */
} __packed;
void wl1251_rx(struct wl1251 *wl);
#endif
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