diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1271_rx.c')
-rw-r--r-- | drivers/net/wireless/wl12xx/wl1271_rx.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1271_rx.c b/drivers/net/wireless/wl12xx/wl1271_rx.c deleted file mode 100644 index 019aa79cd9df..000000000000 --- a/drivers/net/wireless/wl12xx/wl1271_rx.c +++ /dev/null | |||
@@ -1,156 +0,0 @@ | |||
1 | /* | ||
2 | * This file is part of wl1271 | ||
3 | * | ||
4 | * Copyright (C) 2009 Nokia Corporation | ||
5 | * | ||
6 | * Contact: Luciano Coelho <luciano.coelho@nokia.com> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU General Public License | ||
10 | * version 2 as published by the Free Software Foundation. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, but | ||
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
15 | * General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | ||
20 | * 02110-1301 USA | ||
21 | * | ||
22 | */ | ||
23 | |||
24 | #include <linux/gfp.h> | ||
25 | |||
26 | #include "wl1271.h" | ||
27 | #include "wl1271_acx.h" | ||
28 | #include "wl1271_reg.h" | ||
29 | #include "wl1271_rx.h" | ||
30 | #include "wl1271_io.h" | ||
31 | |||
32 | static u8 wl1271_rx_get_mem_block(struct wl1271_fw_status *status, | ||
33 | u32 drv_rx_counter) | ||
34 | { | ||
35 | return le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]) & | ||
36 | RX_MEM_BLOCK_MASK; | ||
37 | } | ||
38 | |||
39 | static u32 wl1271_rx_get_buf_size(struct wl1271_fw_status *status, | ||
40 | u32 drv_rx_counter) | ||
41 | { | ||
42 | return (le32_to_cpu(status->rx_pkt_descs[drv_rx_counter]) & | ||
43 | RX_BUF_SIZE_MASK) >> RX_BUF_SIZE_SHIFT_DIV; | ||
44 | } | ||
45 | |||
46 | static void wl1271_rx_status(struct wl1271 *wl, | ||
47 | struct wl1271_rx_descriptor *desc, | ||
48 | struct ieee80211_rx_status *status, | ||
49 | u8 beacon) | ||
50 | { | ||
51 | memset(status, 0, sizeof(struct ieee80211_rx_status)); | ||
52 | |||
53 | status->band = wl->band; | ||
54 | status->rate_idx = wl1271_rate_to_idx(wl, desc->rate); | ||
55 | |||
56 | status->signal = desc->rssi; | ||
57 | |||
58 | /* | ||
59 | * FIXME: In wl1251, the SNR should be divided by two. In wl1271 we | ||
60 | * need to divide by two for now, but TI has been discussing about | ||
61 | * changing it. This needs to be rechecked. | ||
62 | */ | ||
63 | wl->noise = desc->rssi - (desc->snr >> 1); | ||
64 | |||
65 | status->freq = ieee80211_channel_to_frequency(desc->channel); | ||
66 | |||
67 | if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) { | ||
68 | status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED; | ||
69 | |||
70 | if (likely(!(desc->status & WL1271_RX_DESC_DECRYPT_FAIL))) | ||
71 | status->flag |= RX_FLAG_DECRYPTED; | ||
72 | if (unlikely(desc->status & WL1271_RX_DESC_MIC_FAIL)) | ||
73 | status->flag |= RX_FLAG_MMIC_ERROR; | ||
74 | } | ||
75 | } | ||
76 | |||
77 | static void wl1271_rx_handle_data(struct wl1271 *wl, u32 length) | ||
78 | { | ||
79 | struct ieee80211_rx_status rx_status; | ||
80 | struct wl1271_rx_descriptor *desc; | ||
81 | struct sk_buff *skb; | ||
82 | u16 *fc; | ||
83 | u8 *buf; | ||
84 | u8 beacon = 0; | ||
85 | |||
86 | /* | ||
87 | * In PLT mode we seem to get frames and mac80211 warns about them, | ||
88 | * workaround this by not retrieving them at all. | ||
89 | */ | ||
90 | if (unlikely(wl->state == WL1271_STATE_PLT)) | ||
91 | return; | ||
92 | |||
93 | skb = __dev_alloc_skb(length, GFP_KERNEL); | ||
94 | if (!skb) { | ||
95 | wl1271_error("Couldn't allocate RX frame"); | ||
96 | return; | ||
97 | } | ||
98 | |||
99 | buf = skb_put(skb, length); | ||
100 | wl1271_read(wl, WL1271_SLV_MEM_DATA, buf, length, true); | ||
101 | |||
102 | /* the data read starts with the descriptor */ | ||
103 | desc = (struct wl1271_rx_descriptor *) buf; | ||
104 | |||
105 | /* now we pull the descriptor out of the buffer */ | ||
106 | skb_pull(skb, sizeof(*desc)); | ||
107 | |||
108 | fc = (u16 *)skb->data; | ||
109 | if ((*fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON) | ||
110 | beacon = 1; | ||
111 | |||
112 | wl1271_rx_status(wl, desc, &rx_status, beacon); | ||
113 | |||
114 | wl1271_debug(DEBUG_RX, "rx skb 0x%p: %d B %s", skb, skb->len, | ||
115 | beacon ? "beacon" : ""); | ||
116 | |||
117 | skb_trim(skb, skb->len - desc->pad_len); | ||
118 | |||
119 | memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); | ||
120 | ieee80211_rx_ni(wl->hw, skb); | ||
121 | } | ||
122 | |||
123 | void wl1271_rx(struct wl1271 *wl, struct wl1271_fw_status *status) | ||
124 | { | ||
125 | struct wl1271_acx_mem_map *wl_mem_map = wl->target_mem_map; | ||
126 | u32 buf_size; | ||
127 | u32 fw_rx_counter = status->fw_rx_counter & NUM_RX_PKT_DESC_MOD_MASK; | ||
128 | u32 drv_rx_counter = wl->rx_counter & NUM_RX_PKT_DESC_MOD_MASK; | ||
129 | u32 mem_block; | ||
130 | |||
131 | while (drv_rx_counter != fw_rx_counter) { | ||
132 | mem_block = wl1271_rx_get_mem_block(status, drv_rx_counter); | ||
133 | buf_size = wl1271_rx_get_buf_size(status, drv_rx_counter); | ||
134 | |||
135 | if (buf_size == 0) { | ||
136 | wl1271_warning("received empty data"); | ||
137 | break; | ||
138 | } | ||
139 | |||
140 | wl->rx_mem_pool_addr.addr = (mem_block << 8) + | ||
141 | le32_to_cpu(wl_mem_map->packet_memory_pool_start); | ||
142 | wl->rx_mem_pool_addr.addr_extra = | ||
143 | wl->rx_mem_pool_addr.addr + 4; | ||
144 | |||
145 | /* Choose the block we want to read */ | ||
146 | wl1271_write(wl, WL1271_SLV_REG_DATA, &wl->rx_mem_pool_addr, | ||
147 | sizeof(wl->rx_mem_pool_addr), false); | ||
148 | |||
149 | wl1271_rx_handle_data(wl, buf_size); | ||
150 | |||
151 | wl->rx_counter++; | ||
152 | drv_rx_counter = wl->rx_counter & NUM_RX_PKT_DESC_MOD_MASK; | ||
153 | } | ||
154 | |||
155 | wl1271_write32(wl, RX_DRIVER_COUNTER_ADDRESS, wl->rx_counter); | ||
156 | } | ||