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Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_rx.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1251_rx.c192
1 files changed, 0 insertions, 192 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_rx.c b/drivers/net/wireless/wl12xx/wl1251_rx.c
deleted file mode 100644
index 1b6294b3b996..000000000000
--- a/drivers/net/wireless/wl12xx/wl1251_rx.c
+++ /dev/null
@@ -1,192 +0,0 @@
1/*
2 * This file is part of wl1251
3 *
4 * Copyright (c) 1998-2007 Texas Instruments Incorporated
5 * Copyright (C) 2008 Nokia Corporation
6 *
7 * Contact: Kalle Valo <kalle.valo@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
25#include <linux/skbuff.h>
26#include <linux/gfp.h>
27#include <net/mac80211.h>
28
29#include "wl1251.h"
30#include "wl1251_reg.h"
31#include "wl1251_io.h"
32#include "wl1251_rx.h"
33#include "wl1251_cmd.h"
34#include "wl1251_acx.h"
35
36static void wl1251_rx_header(struct wl1251 *wl,
37 struct wl1251_rx_descriptor *desc)
38{
39 u32 rx_packet_ring_addr;
40
41 rx_packet_ring_addr = wl->data_path->rx_packet_ring_addr;
42 if (wl->rx_current_buffer)
43 rx_packet_ring_addr += wl->data_path->rx_packet_ring_chunk_size;
44
45 wl1251_mem_read(wl, rx_packet_ring_addr, desc, sizeof(*desc));
46}
47
48static void wl1251_rx_status(struct wl1251 *wl,
49 struct wl1251_rx_descriptor *desc,
50 struct ieee80211_rx_status *status,
51 u8 beacon)
52{
53 u64 mactime;
54 int ret;
55
56 memset(status, 0, sizeof(struct ieee80211_rx_status));
57
58 status->band = IEEE80211_BAND_2GHZ;
59 status->mactime = desc->timestamp;
60
61 /*
62 * The rx status timestamp is a 32 bits value while the TSF is a
63 * 64 bits one.
64 * For IBSS merging, TSF is mandatory, so we have to get it
65 * somehow, so we ask for ACX_TSF_INFO.
66 * That could be moved to the get_tsf() hook, but unfortunately,
67 * this one must be atomic, while our SPI routines can sleep.
68 */
69 if ((wl->bss_type == BSS_TYPE_IBSS) && beacon) {
70 ret = wl1251_acx_tsf_info(wl, &mactime);
71 if (ret == 0)
72 status->mactime = mactime;
73 }
74
75 status->signal = desc->rssi;
76
77 /*
78 * FIXME: guessing that snr needs to be divided by two, otherwise
79 * the values don't make any sense
80 */
81 wl->noise = desc->rssi - desc->snr / 2;
82
83 status->freq = ieee80211_channel_to_frequency(desc->channel);
84
85 status->flag |= RX_FLAG_TSFT;
86
87 if (desc->flags & RX_DESC_ENCRYPTION_MASK) {
88 status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;
89
90 if (likely(!(desc->flags & RX_DESC_DECRYPT_FAIL)))
91 status->flag |= RX_FLAG_DECRYPTED;
92
93 if (unlikely(desc->flags & RX_DESC_MIC_FAIL))
94 status->flag |= RX_FLAG_MMIC_ERROR;
95 }
96
97 if (unlikely(!(desc->flags & RX_DESC_VALID_FCS)))
98 status->flag |= RX_FLAG_FAILED_FCS_CRC;
99
100
101 /* FIXME: set status->rate_idx */
102}
103
104static void wl1251_rx_body(struct wl1251 *wl,
105 struct wl1251_rx_descriptor *desc)
106{
107 struct sk_buff *skb;
108 struct ieee80211_rx_status status;
109 u8 *rx_buffer, beacon = 0;
110 u16 length, *fc;
111 u32 curr_id, last_id_inc, rx_packet_ring_addr;
112
113 length = WL1251_RX_ALIGN(desc->length - PLCP_HEADER_LENGTH);
114 curr_id = (desc->flags & RX_DESC_SEQNUM_MASK) >> RX_DESC_PACKETID_SHIFT;
115 last_id_inc = (wl->rx_last_id + 1) % (RX_MAX_PACKET_ID + 1);
116
117 if (last_id_inc != curr_id) {
118 wl1251_warning("curr ID:%d, last ID inc:%d",
119 curr_id, last_id_inc);
120 wl->rx_last_id = curr_id;
121 } else {
122 wl->rx_last_id = last_id_inc;
123 }
124
125 rx_packet_ring_addr = wl->data_path->rx_packet_ring_addr +
126 sizeof(struct wl1251_rx_descriptor) + 20;
127 if (wl->rx_current_buffer)
128 rx_packet_ring_addr += wl->data_path->rx_packet_ring_chunk_size;
129
130 skb = __dev_alloc_skb(length, GFP_KERNEL);
131 if (!skb) {
132 wl1251_error("Couldn't allocate RX frame");
133 return;
134 }
135
136 rx_buffer = skb_put(skb, length);
137 wl1251_mem_read(wl, rx_packet_ring_addr, rx_buffer, length);
138
139 /* The actual lenght doesn't include the target's alignment */
140 skb->len = desc->length - PLCP_HEADER_LENGTH;
141
142 fc = (u16 *)skb->data;
143
144 if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON)
145 beacon = 1;
146
147 wl1251_rx_status(wl, desc, &status, beacon);
148
149 wl1251_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len,
150 beacon ? "beacon" : "");
151
152 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
153 ieee80211_rx_ni(wl->hw, skb);
154}
155
156static void wl1251_rx_ack(struct wl1251 *wl)
157{
158 u32 data, addr;
159
160 if (wl->rx_current_buffer) {
161 addr = ACX_REG_INTERRUPT_TRIG_H;
162 data = INTR_TRIG_RX_PROC1;
163 } else {
164 addr = ACX_REG_INTERRUPT_TRIG;
165 data = INTR_TRIG_RX_PROC0;
166 }
167
168 wl1251_reg_write32(wl, addr, data);
169
170 /* Toggle buffer ring */
171 wl->rx_current_buffer = !wl->rx_current_buffer;
172}
173
174
175void wl1251_rx(struct wl1251 *wl)
176{
177 struct wl1251_rx_descriptor *rx_desc;
178
179 if (wl->state != WL1251_STATE_ON)
180 return;
181
182 rx_desc = wl->rx_descriptor;
183
184 /* We first read the frame's header */
185 wl1251_rx_header(wl, rx_desc);
186
187 /* Now we can read the body */
188 wl1251_rx_body(wl, rx_desc);
189
190 /* Finally, we need to ACK the RX */
191 wl1251_rx_ack(wl);
192}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-10 13:42:34 -0400