1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | /* 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 |