| /* 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 |
