1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * This file is part of wl1251 |
4 | * |
5 | * Copyright (c) 1998-2007 Texas Instruments Incorporated |
6 | * Copyright (C) 2008 Nokia Corporation |
7 | */ |
8 | |
9 | #ifndef __WL1251_RX_H__ |
10 | #define __WL1251_RX_H__ |
11 | |
12 | #include <linux/bitops.h> |
13 | |
14 | #include "wl1251.h" |
15 | |
16 | /* |
17 | * RX PATH |
18 | * |
19 | * The Rx path uses a double buffer and an rx_contro structure, each located |
20 | * at a fixed address in the device memory. The host keeps track of which |
21 | * buffer is available and alternates between them on a per packet basis. |
22 | * The size of each of the two buffers is large enough to hold the longest |
23 | * 802.3 packet. |
24 | * The RX path goes like that: |
25 | * 1) The target generates an interrupt each time a new packet is received. |
26 | * There are 2 RX interrupts, one for each buffer. |
27 | * 2) The host reads the received packet from one of the double buffers. |
28 | * 3) The host triggers a target interrupt. |
29 | * 4) The target prepares the next RX packet. |
30 | */ |
31 | |
32 | #define -30 |
33 | #define -95 |
34 | |
35 | #define WL1251_RX_ALIGN_TO 4 |
36 | #define WL1251_RX_ALIGN(len) (((len) + WL1251_RX_ALIGN_TO - 1) & \ |
37 | ~(WL1251_RX_ALIGN_TO - 1)) |
38 | |
39 | #define SHORT_PREAMBLE_BIT BIT(0) |
40 | #define OFDM_RATE_BIT BIT(6) |
41 | #define PBCC_RATE_BIT BIT(7) |
42 | |
43 | #define 8 |
44 | #define RX_DESC_PACKETID_SHIFT 11 |
45 | #define RX_MAX_PACKET_ID 3 |
46 | |
47 | #define RX_DESC_VALID_FCS 0x0001 |
48 | #define RX_DESC_MATCH_RXADDR1 0x0002 |
49 | #define RX_DESC_MCAST 0x0004 |
50 | #define RX_DESC_STAINTIM 0x0008 |
51 | #define RX_DESC_VIRTUAL_BM 0x0010 |
52 | #define RX_DESC_BCAST 0x0020 |
53 | #define RX_DESC_MATCH_SSID 0x0040 |
54 | #define RX_DESC_MATCH_BSSID 0x0080 |
55 | #define RX_DESC_ENCRYPTION_MASK 0x0300 |
56 | #define RX_DESC_MEASURMENT 0x0400 |
57 | #define RX_DESC_SEQNUM_MASK 0x1800 |
58 | #define RX_DESC_MIC_FAIL 0x2000 |
59 | #define RX_DESC_DECRYPT_FAIL 0x4000 |
60 | |
61 | struct wl1251_rx_descriptor { |
62 | u32 timestamp; /* In microseconds */ |
63 | u16 length; /* Paylod length, including headers */ |
64 | u16 flags; |
65 | |
66 | /* |
67 | * 0 - 802.11 |
68 | * 1 - 802.3 |
69 | * 2 - IP |
70 | * 3 - Raw Codec |
71 | */ |
72 | u8 type; |
73 | |
74 | /* |
75 | * Received Rate: |
76 | * 0x0A - 1MBPS |
77 | * 0x14 - 2MBPS |
78 | * 0x37 - 5_5MBPS |
79 | * 0x0B - 6MBPS |
80 | * 0x0F - 9MBPS |
81 | * 0x6E - 11MBPS |
82 | * 0x0A - 12MBPS |
83 | * 0x0E - 18MBPS |
84 | * 0xDC - 22MBPS |
85 | * 0x09 - 24MBPS |
86 | * 0x0D - 36MBPS |
87 | * 0x08 - 48MBPS |
88 | * 0x0C - 54MBPS |
89 | */ |
90 | u8 rate; |
91 | |
92 | u8 mod_pre; /* Modulation and preamble */ |
93 | u8 channel; |
94 | |
95 | /* |
96 | * 0 - 2.4 Ghz |
97 | * 1 - 5 Ghz |
98 | */ |
99 | u8 band; |
100 | |
101 | s8 ; /* in dB */ |
102 | u8 rcpi; /* in dB */ |
103 | u8 snr; /* in dB */ |
104 | } __packed; |
105 | |
106 | void wl1251_rx(struct wl1251 *wl); |
107 | |
108 | #endif |
109 | |