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Commit | Line | Data |
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66bb42fd | 1 | /* ZD1211 USB-WLAN driver for Linux |
459c51ad | 2 | * |
66bb42fd DD |
3 | * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de> |
4 | * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org> | |
5 | * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net> | |
e83a1070 | 6 | * Copyright (C) 2007-2008 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> |
e85d0918 DD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/netdevice.h> | |
24 | #include <linux/etherdevice.h> | |
e85d0918 DD |
25 | #include <linux/usb.h> |
26 | #include <linux/jiffies.h> | |
27 | #include <net/ieee80211_radiotap.h> | |
28 | ||
29 | #include "zd_def.h" | |
30 | #include "zd_chip.h" | |
31 | #include "zd_mac.h" | |
e85d0918 | 32 | #include "zd_rf.h" |
e85d0918 | 33 | |
e83a1070 LR |
34 | struct zd_reg_alpha2_map { |
35 | u32 reg; | |
36 | char alpha2[2]; | |
37 | }; | |
38 | ||
39 | static struct zd_reg_alpha2_map reg_alpha2_map[] = { | |
40 | { ZD_REGDOMAIN_FCC, "US" }, | |
41 | { ZD_REGDOMAIN_IC, "CA" }, | |
42 | { ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */ | |
43 | { ZD_REGDOMAIN_JAPAN, "JP" }, | |
44 | { ZD_REGDOMAIN_JAPAN_ADD, "JP" }, | |
45 | { ZD_REGDOMAIN_SPAIN, "ES" }, | |
46 | { ZD_REGDOMAIN_FRANCE, "FR" }, | |
47 | }; | |
48 | ||
459c51ad DD |
49 | /* This table contains the hardware specific values for the modulation rates. */ |
50 | static const struct ieee80211_rate zd_rates[] = { | |
8318d78a JB |
51 | { .bitrate = 10, |
52 | .hw_value = ZD_CCK_RATE_1M, }, | |
53 | { .bitrate = 20, | |
54 | .hw_value = ZD_CCK_RATE_2M, | |
55 | .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, | |
56 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
57 | { .bitrate = 55, | |
58 | .hw_value = ZD_CCK_RATE_5_5M, | |
59 | .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, | |
60 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
61 | { .bitrate = 110, | |
62 | .hw_value = ZD_CCK_RATE_11M, | |
63 | .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, | |
64 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
65 | { .bitrate = 60, | |
66 | .hw_value = ZD_OFDM_RATE_6M, | |
67 | .flags = 0 }, | |
68 | { .bitrate = 90, | |
69 | .hw_value = ZD_OFDM_RATE_9M, | |
70 | .flags = 0 }, | |
71 | { .bitrate = 120, | |
72 | .hw_value = ZD_OFDM_RATE_12M, | |
73 | .flags = 0 }, | |
74 | { .bitrate = 180, | |
75 | .hw_value = ZD_OFDM_RATE_18M, | |
76 | .flags = 0 }, | |
77 | { .bitrate = 240, | |
78 | .hw_value = ZD_OFDM_RATE_24M, | |
79 | .flags = 0 }, | |
80 | { .bitrate = 360, | |
81 | .hw_value = ZD_OFDM_RATE_36M, | |
82 | .flags = 0 }, | |
83 | { .bitrate = 480, | |
84 | .hw_value = ZD_OFDM_RATE_48M, | |
85 | .flags = 0 }, | |
86 | { .bitrate = 540, | |
87 | .hw_value = ZD_OFDM_RATE_54M, | |
88 | .flags = 0 }, | |
459c51ad DD |
89 | }; |
90 | ||
7f4013f0 BP |
91 | /* |
92 | * Zydas retry rates table. Each line is listed in the same order as | |
93 | * in zd_rates[] and contains all the rate used when a packet is sent | |
94 | * starting with a given rates. Let's consider an example : | |
95 | * | |
96 | * "11 Mbits : 4, 3, 2, 1, 0" means : | |
97 | * - packet is sent using 4 different rates | |
98 | * - 1st rate is index 3 (ie 11 Mbits) | |
99 | * - 2nd rate is index 2 (ie 5.5 Mbits) | |
100 | * - 3rd rate is index 1 (ie 2 Mbits) | |
101 | * - 4th rate is index 0 (ie 1 Mbits) | |
102 | */ | |
103 | ||
104 | static const struct tx_retry_rate zd_retry_rates[] = { | |
105 | { /* 1 Mbits */ 1, { 0 }}, | |
106 | { /* 2 Mbits */ 2, { 1, 0 }}, | |
107 | { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, | |
108 | { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, | |
109 | { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, | |
110 | { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, | |
111 | { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, | |
112 | { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, | |
113 | { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, | |
114 | { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, | |
115 | { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, | |
116 | { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} | |
117 | }; | |
118 | ||
459c51ad | 119 | static const struct ieee80211_channel zd_channels[] = { |
8318d78a JB |
120 | { .center_freq = 2412, .hw_value = 1 }, |
121 | { .center_freq = 2417, .hw_value = 2 }, | |
122 | { .center_freq = 2422, .hw_value = 3 }, | |
123 | { .center_freq = 2427, .hw_value = 4 }, | |
124 | { .center_freq = 2432, .hw_value = 5 }, | |
125 | { .center_freq = 2437, .hw_value = 6 }, | |
126 | { .center_freq = 2442, .hw_value = 7 }, | |
127 | { .center_freq = 2447, .hw_value = 8 }, | |
128 | { .center_freq = 2452, .hw_value = 9 }, | |
129 | { .center_freq = 2457, .hw_value = 10 }, | |
130 | { .center_freq = 2462, .hw_value = 11 }, | |
131 | { .center_freq = 2467, .hw_value = 12 }, | |
132 | { .center_freq = 2472, .hw_value = 13 }, | |
133 | { .center_freq = 2484, .hw_value = 14 }, | |
459c51ad | 134 | }; |
e85d0918 | 135 | |
583afd1e UK |
136 | static void housekeeping_init(struct zd_mac *mac); |
137 | static void housekeeping_enable(struct zd_mac *mac); | |
138 | static void housekeeping_disable(struct zd_mac *mac); | |
139 | ||
e83a1070 LR |
140 | static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
141 | { | |
142 | unsigned int i; | |
143 | struct zd_reg_alpha2_map *reg_map; | |
144 | for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { | |
145 | reg_map = ®_alpha2_map[i]; | |
146 | if (regdomain == reg_map->reg) { | |
147 | alpha2[0] = reg_map->alpha2[0]; | |
148 | alpha2[1] = reg_map->alpha2[1]; | |
149 | return 0; | |
150 | } | |
151 | } | |
152 | return 1; | |
153 | } | |
154 | ||
459c51ad | 155 | int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
e85d0918 DD |
156 | { |
157 | int r; | |
e85d0918 | 158 | u8 addr[ETH_ALEN]; |
459c51ad | 159 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed DD |
160 | |
161 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); | |
162 | if (r) | |
163 | return r; | |
164 | ||
459c51ad DD |
165 | SET_IEEE80211_PERM_ADDR(hw, addr); |
166 | ||
74553aed DD |
167 | return 0; |
168 | } | |
169 | ||
459c51ad | 170 | int zd_mac_init_hw(struct ieee80211_hw *hw) |
74553aed DD |
171 | { |
172 | int r; | |
459c51ad | 173 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed | 174 | struct zd_chip *chip = &mac->chip; |
e83a1070 | 175 | char alpha2[2]; |
e85d0918 DD |
176 | u8 default_regdomain; |
177 | ||
178 | r = zd_chip_enable_int(chip); | |
179 | if (r) | |
180 | goto out; | |
74553aed | 181 | r = zd_chip_init_hw(chip); |
e85d0918 DD |
182 | if (r) |
183 | goto disable_int; | |
184 | ||
e85d0918 | 185 | ZD_ASSERT(!irqs_disabled()); |
e85d0918 DD |
186 | |
187 | r = zd_read_regdomain(chip, &default_regdomain); | |
188 | if (r) | |
189 | goto disable_int; | |
e85d0918 DD |
190 | spin_lock_irq(&mac->lock); |
191 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
192 | spin_unlock_irq(&mac->lock); | |
e85d0918 | 193 | |
40da08bc DD |
194 | /* We must inform the device that we are doing encryption/decryption in |
195 | * software at the moment. */ | |
196 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
197 | if (r) |
198 | goto disable_int; | |
199 | ||
e83a1070 | 200 | r = zd_reg2alpha2(mac->regdomain, alpha2); |
fe33eb39 LR |
201 | if (r) |
202 | goto disable_int; | |
e85d0918 | 203 | |
fe33eb39 | 204 | r = regulatory_hint(hw->wiphy, alpha2); |
e85d0918 DD |
205 | disable_int: |
206 | zd_chip_disable_int(chip); | |
207 | out: | |
208 | return r; | |
209 | } | |
210 | ||
211 | void zd_mac_clear(struct zd_mac *mac) | |
212 | { | |
9cdac965 | 213 | flush_workqueue(zd_workqueue); |
e85d0918 | 214 | zd_chip_clear(&mac->chip); |
c48cf125 UK |
215 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
216 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); | |
e85d0918 DD |
217 | } |
218 | ||
c5691235 | 219 | static int set_rx_filter(struct zd_mac *mac) |
e85d0918 | 220 | { |
459c51ad DD |
221 | unsigned long flags; |
222 | u32 filter = STA_RX_FILTER; | |
e85d0918 | 223 | |
459c51ad DD |
224 | spin_lock_irqsave(&mac->lock, flags); |
225 | if (mac->pass_ctrl) | |
226 | filter |= RX_FILTER_CTRL; | |
227 | spin_unlock_irqrestore(&mac->lock, flags); | |
228 | ||
229 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
c5691235 UK |
230 | } |
231 | ||
232 | static int set_mc_hash(struct zd_mac *mac) | |
233 | { | |
234 | struct zd_mc_hash hash; | |
c5691235 | 235 | zd_mc_clear(&hash); |
c5691235 UK |
236 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
237 | } | |
238 | ||
459c51ad | 239 | static int zd_op_start(struct ieee80211_hw *hw) |
e85d0918 | 240 | { |
459c51ad | 241 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 242 | struct zd_chip *chip = &mac->chip; |
74553aed | 243 | struct zd_usb *usb = &chip->usb; |
e85d0918 DD |
244 | int r; |
245 | ||
74553aed DD |
246 | if (!usb->initialized) { |
247 | r = zd_usb_init_hw(usb); | |
248 | if (r) | |
249 | goto out; | |
250 | } | |
251 | ||
e85d0918 DD |
252 | r = zd_chip_enable_int(chip); |
253 | if (r < 0) | |
254 | goto out; | |
255 | ||
256 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
257 | if (r < 0) | |
258 | goto disable_int; | |
c5691235 | 259 | r = set_rx_filter(mac); |
c5691235 UK |
260 | if (r) |
261 | goto disable_int; | |
262 | r = set_mc_hash(mac); | |
e85d0918 DD |
263 | if (r) |
264 | goto disable_int; | |
265 | r = zd_chip_switch_radio_on(chip); | |
266 | if (r < 0) | |
267 | goto disable_int; | |
459c51ad | 268 | r = zd_chip_enable_rxtx(chip); |
e85d0918 DD |
269 | if (r < 0) |
270 | goto disable_radio; | |
271 | r = zd_chip_enable_hwint(chip); | |
272 | if (r < 0) | |
459c51ad | 273 | goto disable_rxtx; |
e85d0918 | 274 | |
583afd1e | 275 | housekeeping_enable(mac); |
e85d0918 | 276 | return 0; |
459c51ad DD |
277 | disable_rxtx: |
278 | zd_chip_disable_rxtx(chip); | |
e85d0918 DD |
279 | disable_radio: |
280 | zd_chip_switch_radio_off(chip); | |
281 | disable_int: | |
282 | zd_chip_disable_int(chip); | |
283 | out: | |
284 | return r; | |
285 | } | |
286 | ||
459c51ad DD |
287 | static void zd_op_stop(struct ieee80211_hw *hw) |
288 | { | |
289 | struct zd_mac *mac = zd_hw_mac(hw); | |
290 | struct zd_chip *chip = &mac->chip; | |
291 | struct sk_buff *skb; | |
292 | struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; | |
c9a4b35d | 293 | |
459c51ad | 294 | /* The order here deliberately is a little different from the open() |
e85d0918 | 295 | * method, since we need to make sure there is no opportunity for RX |
459c51ad | 296 | * frames to be processed by mac80211 after we have stopped it. |
e85d0918 DD |
297 | */ |
298 | ||
459c51ad | 299 | zd_chip_disable_rxtx(chip); |
583afd1e | 300 | housekeeping_disable(mac); |
b1382ede | 301 | flush_workqueue(zd_workqueue); |
b1382ede | 302 | |
e85d0918 DD |
303 | zd_chip_disable_hwint(chip); |
304 | zd_chip_switch_radio_off(chip); | |
305 | zd_chip_disable_int(chip); | |
306 | ||
e85d0918 | 307 | |
459c51ad | 308 | while ((skb = skb_dequeue(ack_wait_queue))) |
e039fa4a | 309 | dev_kfree_skb_any(skb); |
e85d0918 DD |
310 | } |
311 | ||
459c51ad | 312 | /** |
7f4013f0 | 313 | * zd_mac_tx_status - reports tx status of a packet if required |
459c51ad DD |
314 | * @hw - a &struct ieee80211_hw pointer |
315 | * @skb - a sk-buffer | |
e039fa4a JB |
316 | * @flags: extra flags to set in the TX status info |
317 | * @ackssi: ACK signal strength | |
73ac36ea | 318 | * @success - True for successful transmission of the frame |
459c51ad DD |
319 | * |
320 | * This information calls ieee80211_tx_status_irqsafe() if required by the | |
321 | * control information. It copies the control information into the status | |
322 | * information. | |
323 | * | |
324 | * If no status information has been requested, the skb is freed. | |
325 | */ | |
7f4013f0 BP |
326 | static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
327 | int ackssi, struct tx_status *tx_status) | |
b1382ede | 328 | { |
e039fa4a | 329 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7f4013f0 BP |
330 | int i; |
331 | int success = 1, retry = 1; | |
332 | int first_idx; | |
333 | const struct tx_retry_rate *retries; | |
e039fa4a | 334 | |
e6a9854b | 335 | ieee80211_tx_info_clear_status(info); |
b1382ede | 336 | |
7f4013f0 BP |
337 | if (tx_status) { |
338 | success = !tx_status->failure; | |
339 | retry = tx_status->retry + success; | |
340 | } | |
341 | ||
342 | if (success) { | |
343 | /* success */ | |
e6a9854b | 344 | info->flags |= IEEE80211_TX_STAT_ACK; |
7f4013f0 BP |
345 | } else { |
346 | /* failure */ | |
347 | info->flags &= ~IEEE80211_TX_STAT_ACK; | |
348 | } | |
349 | ||
350 | first_idx = info->status.rates[0].idx; | |
351 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
352 | retries = &zd_retry_rates[first_idx]; | |
353 | ZD_ASSERT(0<=retry && retry<=retries->count); | |
354 | ||
355 | info->status.rates[0].idx = retries->rate[0]; | |
356 | info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); | |
357 | ||
358 | for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { | |
359 | info->status.rates[i].idx = retries->rate[i]; | |
360 | info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); | |
361 | } | |
362 | for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { | |
363 | info->status.rates[i].idx = retries->rate[retry-1]; | |
364 | info->status.rates[i].count = 1; // (success ? 1:2); | |
365 | } | |
366 | if (i<IEEE80211_TX_MAX_RATES) | |
367 | info->status.rates[i].idx = -1; /* terminate */ | |
368 | ||
e039fa4a JB |
369 | info->status.ack_signal = ackssi; |
370 | ieee80211_tx_status_irqsafe(hw, skb); | |
b1382ede DD |
371 | } |
372 | ||
459c51ad DD |
373 | /** |
374 | * zd_mac_tx_failed - callback for failed frames | |
375 | * @dev: the mac80211 wireless device | |
376 | * | |
377 | * This function is called if a frame couldn't be succesfully be | |
378 | * transferred. The first frame from the tx queue, will be selected and | |
379 | * reported as error to the upper layers. | |
380 | */ | |
7f4013f0 | 381 | void zd_mac_tx_failed(struct urb *urb) |
b1382ede | 382 | { |
7f4013f0 BP |
383 | struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); |
384 | struct zd_mac *mac = zd_hw_mac(hw); | |
385 | struct sk_buff_head *q = &mac->ack_wait_queue; | |
459c51ad | 386 | struct sk_buff *skb; |
7f4013f0 BP |
387 | struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; |
388 | unsigned long flags; | |
389 | int success = !tx_status->failure; | |
390 | int retry = tx_status->retry + success; | |
391 | int found = 0; | |
392 | int i, position = 0; | |
b1382ede | 393 | |
7f4013f0 BP |
394 | q = &mac->ack_wait_queue; |
395 | spin_lock_irqsave(&q->lock, flags); | |
396 | ||
397 | skb_queue_walk(q, skb) { | |
398 | struct ieee80211_hdr *tx_hdr; | |
399 | struct ieee80211_tx_info *info; | |
400 | int first_idx, final_idx; | |
401 | const struct tx_retry_rate *retries; | |
402 | u8 final_rate; | |
403 | ||
404 | position ++; | |
405 | ||
406 | /* if the hardware reports a failure and we had a 802.11 ACK | |
407 | * pending, then we skip the first skb when searching for a | |
408 | * matching frame */ | |
409 | if (tx_status->failure && mac->ack_pending && | |
410 | skb_queue_is_first(q, skb)) { | |
411 | continue; | |
412 | } | |
413 | ||
414 | tx_hdr = (struct ieee80211_hdr *)skb->data; | |
415 | ||
416 | /* we skip all frames not matching the reported destination */ | |
417 | if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) { | |
418 | continue; | |
419 | } | |
420 | ||
421 | /* we skip all frames not matching the reported final rate */ | |
5078ed50 | 422 | |
7f4013f0 BP |
423 | info = IEEE80211_SKB_CB(skb); |
424 | first_idx = info->status.rates[0].idx; | |
425 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
426 | retries = &zd_retry_rates[first_idx]; | |
427 | if (retry < 0 || retry > retries->count) { | |
428 | continue; | |
429 | } | |
430 | ||
431 | ZD_ASSERT(0<=retry && retry<=retries->count); | |
432 | final_idx = retries->rate[retry-1]; | |
433 | final_rate = zd_rates[final_idx].hw_value; | |
434 | ||
435 | if (final_rate != tx_status->rate) { | |
436 | continue; | |
437 | } | |
438 | ||
439 | found = 1; | |
440 | break; | |
441 | } | |
442 | ||
443 | if (found) { | |
444 | for (i=1; i<=position; i++) { | |
445 | skb = __skb_dequeue(q); | |
446 | zd_mac_tx_status(hw, skb, | |
447 | mac->ack_pending ? mac->ack_signal : 0, | |
448 | i == position ? tx_status : NULL); | |
449 | mac->ack_pending = 0; | |
450 | } | |
451 | } | |
452 | ||
453 | spin_unlock_irqrestore(&q->lock, flags); | |
b1382ede DD |
454 | } |
455 | ||
459c51ad DD |
456 | /** |
457 | * zd_mac_tx_to_dev - callback for USB layer | |
458 | * @skb: a &sk_buff pointer | |
459 | * @error: error value, 0 if transmission successful | |
460 | * | |
461 | * Informs the MAC layer that the frame has successfully transferred to the | |
462 | * device. If an ACK is required and the transfer to the device has been | |
463 | * successful, the packets are put on the @ack_wait_queue with | |
464 | * the control set removed. | |
465 | */ | |
466 | void zd_mac_tx_to_dev(struct sk_buff *skb, int error) | |
467 | { | |
e039fa4a | 468 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b | 469 | struct ieee80211_hw *hw = info->rate_driver_data[0]; |
7f4013f0 BP |
470 | struct zd_mac *mac = zd_hw_mac(hw); |
471 | ||
472 | ieee80211_tx_info_clear_status(info); | |
b1382ede | 473 | |
e039fa4a JB |
474 | skb_pull(skb, sizeof(struct zd_ctrlset)); |
475 | if (unlikely(error || | |
476 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) { | |
7f4013f0 BP |
477 | /* |
478 | * FIXME : do we need to fill in anything ? | |
479 | */ | |
480 | ieee80211_tx_status_irqsafe(hw, skb); | |
459c51ad | 481 | } else { |
7f4013f0 | 482 | struct sk_buff_head *q = &mac->ack_wait_queue; |
e039fa4a JB |
483 | |
484 | skb_queue_tail(q, skb); | |
7f4013f0 BP |
485 | while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { |
486 | zd_mac_tx_status(hw, skb_dequeue(q), | |
487 | mac->ack_pending ? mac->ack_signal : 0, | |
488 | NULL); | |
489 | mac->ack_pending = 0; | |
490 | } | |
e85d0918 | 491 | } |
e85d0918 DD |
492 | } |
493 | ||
b1cd8416 | 494 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 | 495 | { |
64f222cc | 496 | /* ZD_PURE_RATE() must be used to remove the modulation type flag of |
459c51ad DD |
497 | * the zd-rate values. |
498 | */ | |
e85d0918 | 499 | static const u8 rate_divisor[] = { |
459c51ad DD |
500 | [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, |
501 | [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, | |
502 | /* Bits must be doubled. */ | |
503 | [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, | |
504 | [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, | |
505 | [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, | |
506 | [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, | |
507 | [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, | |
508 | [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, | |
509 | [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, | |
510 | [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, | |
511 | [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, | |
512 | [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, | |
e85d0918 DD |
513 | }; |
514 | ||
515 | u32 bits = (u32)tx_length * 8; | |
516 | u32 divisor; | |
517 | ||
64f222cc | 518 | divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; |
e85d0918 DD |
519 | if (divisor == 0) |
520 | return -EINVAL; | |
521 | ||
b1cd8416 DD |
522 | switch (zd_rate) { |
523 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
524 | bits = (2*bits) + 10; /* round up to the next integer */ |
525 | break; | |
b1cd8416 | 526 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
527 | if (service) { |
528 | u32 t = bits % 11; | |
529 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
530 | if (0 < t && t <= 3) { | |
531 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
532 | } | |
533 | } | |
534 | bits += 10; /* round up to the next integer */ | |
535 | break; | |
536 | } | |
537 | ||
538 | return bits/divisor; | |
539 | } | |
540 | ||
e85d0918 | 541 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
e6a9854b JB |
542 | struct ieee80211_hdr *header, |
543 | struct ieee80211_tx_info *info) | |
e85d0918 | 544 | { |
e85d0918 | 545 | /* |
b1382ede | 546 | * CONTROL TODO: |
e85d0918 DD |
547 | * - if backoff needed, enable bit 0 |
548 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
549 | */ |
550 | ||
551 | cs->control = 0; | |
552 | ||
553 | /* First fragment */ | |
e6a9854b | 554 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
e85d0918 DD |
555 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
556 | ||
13bdcd90 GS |
557 | /* No ACK expected (multicast, etc.) */ |
558 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
559 | cs->control |= ZD_CS_NO_ACK; | |
e85d0918 DD |
560 | |
561 | /* PS-POLL */ | |
85365820 | 562 | if (ieee80211_is_pspoll(header->frame_control)) |
e85d0918 DD |
563 | cs->control |= ZD_CS_PS_POLL_FRAME; |
564 | ||
e6a9854b | 565 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b1382ede DD |
566 | cs->control |= ZD_CS_RTS; |
567 | ||
e6a9854b | 568 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
b1382ede | 569 | cs->control |= ZD_CS_SELF_CTS; |
e85d0918 DD |
570 | |
571 | /* FIXME: Management frame? */ | |
572 | } | |
573 | ||
f2cae6c5 | 574 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon) |
72e77a8a LCC |
575 | { |
576 | struct zd_mac *mac = zd_hw_mac(hw); | |
f2cae6c5 | 577 | int r; |
72e77a8a LCC |
578 | u32 tmp, j = 0; |
579 | /* 4 more bytes for tail CRC */ | |
580 | u32 full_len = beacon->len + 4; | |
f2cae6c5 DD |
581 | |
582 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0); | |
583 | if (r < 0) | |
584 | return r; | |
585 | r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
72e77a8a | 589 | while (tmp & 0x2) { |
f2cae6c5 DD |
590 | r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); |
591 | if (r < 0) | |
592 | return r; | |
72e77a8a LCC |
593 | if ((++j % 100) == 0) { |
594 | printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n"); | |
595 | if (j >= 500) { | |
596 | printk(KERN_ERR "Giving up beacon config.\n"); | |
f2cae6c5 | 597 | return -ETIMEDOUT; |
72e77a8a LCC |
598 | } |
599 | } | |
600 | msleep(1); | |
601 | } | |
602 | ||
f2cae6c5 DD |
603 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1); |
604 | if (r < 0) | |
605 | return r; | |
606 | if (zd_chip_is_zd1211b(&mac->chip)) { | |
607 | r = zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1); | |
608 | if (r < 0) | |
609 | return r; | |
610 | } | |
72e77a8a | 611 | |
f2cae6c5 DD |
612 | for (j = 0 ; j < beacon->len; j++) { |
613 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, | |
72e77a8a | 614 | *((u8 *)(beacon->data + j))); |
f2cae6c5 DD |
615 | if (r < 0) |
616 | return r; | |
617 | } | |
72e77a8a | 618 | |
f2cae6c5 DD |
619 | for (j = 0; j < 4; j++) { |
620 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0); | |
621 | if (r < 0) | |
622 | return r; | |
623 | } | |
624 | ||
625 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1); | |
626 | if (r < 0) | |
627 | return r; | |
72e77a8a | 628 | |
72e77a8a LCC |
629 | /* 802.11b/g 2.4G CCK 1Mb |
630 | * 802.11a, not yet implemented, uses different values (see GPL vendor | |
631 | * driver) | |
632 | */ | |
f2cae6c5 | 633 | return zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 | |
72e77a8a LCC |
634 | (full_len << 19)); |
635 | } | |
636 | ||
e85d0918 | 637 | static int fill_ctrlset(struct zd_mac *mac, |
e039fa4a | 638 | struct sk_buff *skb) |
e85d0918 DD |
639 | { |
640 | int r; | |
459c51ad DD |
641 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
642 | unsigned int frag_len = skb->len + FCS_LEN; | |
e85d0918 | 643 | unsigned int packet_length; |
2e92e6f2 | 644 | struct ieee80211_rate *txrate; |
e85d0918 DD |
645 | struct zd_ctrlset *cs = (struct zd_ctrlset *) |
646 | skb_push(skb, sizeof(struct zd_ctrlset)); | |
e039fa4a | 647 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 | 648 | |
e85d0918 | 649 | ZD_ASSERT(frag_len <= 0xffff); |
e85d0918 | 650 | |
e039fa4a | 651 | txrate = ieee80211_get_tx_rate(mac->hw, info); |
2e92e6f2 JB |
652 | |
653 | cs->modulation = txrate->hw_value; | |
e6a9854b | 654 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
2e92e6f2 | 655 | cs->modulation = txrate->hw_value_short; |
e85d0918 DD |
656 | |
657 | cs->tx_length = cpu_to_le16(frag_len); | |
658 | ||
e6a9854b | 659 | cs_set_control(mac, cs, hdr, info); |
e85d0918 DD |
660 | |
661 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
662 | ZD_ASSERT(packet_length <= 0xffff); | |
663 | /* ZD1211B: Computing the length difference this way, gives us | |
664 | * flexibility to compute the packet length. | |
665 | */ | |
74553aed | 666 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
e85d0918 DD |
667 | packet_length - frag_len : packet_length); |
668 | ||
669 | /* | |
670 | * CURRENT LENGTH: | |
671 | * - transmit frame length in microseconds | |
672 | * - seems to be derived from frame length | |
673 | * - see Cal_Us_Service() in zdinlinef.h | |
674 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
675 | * - bTxBurstEnable is never set in the vendor driver | |
676 | * | |
677 | * SERVICE: | |
678 | * - "for PLCP configuration" | |
679 | * - always 0 except in some situations at 802.11b 11M | |
680 | * - see line 53 of zdinlinef.h | |
681 | */ | |
682 | cs->service = 0; | |
64f222cc | 683 | r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), |
e85d0918 DD |
684 | le16_to_cpu(cs->tx_length)); |
685 | if (r < 0) | |
686 | return r; | |
687 | cs->current_length = cpu_to_le16(r); | |
459c51ad | 688 | cs->next_frame_length = 0; |
e85d0918 DD |
689 | |
690 | return 0; | |
691 | } | |
692 | ||
459c51ad DD |
693 | /** |
694 | * zd_op_tx - transmits a network frame to the device | |
695 | * | |
696 | * @dev: mac80211 hardware device | |
697 | * @skb: socket buffer | |
698 | * @control: the control structure | |
699 | * | |
700 | * This function transmit an IEEE 802.11 network frame to the device. The | |
701 | * control block of the skbuff will be initialized. If necessary the incoming | |
702 | * mac80211 queues will be stopped. | |
703 | */ | |
e039fa4a | 704 | static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
e85d0918 | 705 | { |
459c51ad | 706 | struct zd_mac *mac = zd_hw_mac(hw); |
e039fa4a | 707 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
459c51ad | 708 | int r; |
e85d0918 | 709 | |
e039fa4a | 710 | r = fill_ctrlset(mac, skb); |
459c51ad | 711 | if (r) |
640c65ea | 712 | goto fail; |
e85d0918 | 713 | |
e6a9854b | 714 | info->rate_driver_data[0] = hw; |
e039fa4a | 715 | |
459c51ad | 716 | r = zd_usb_tx(&mac->chip.usb, skb); |
e039fa4a | 717 | if (r) |
640c65ea JM |
718 | goto fail; |
719 | return 0; | |
720 | ||
721 | fail: | |
722 | dev_kfree_skb(skb); | |
e85d0918 DD |
723 | return 0; |
724 | } | |
725 | ||
459c51ad DD |
726 | /** |
727 | * filter_ack - filters incoming packets for acknowledgements | |
728 | * @dev: the mac80211 device | |
729 | * @rx_hdr: received header | |
730 | * @stats: the status for the received packet | |
741fec53 | 731 | * |
459c51ad DD |
732 | * This functions looks for ACK packets and tries to match them with the |
733 | * frames in the tx queue. If a match is found the frame will be dequeued and | |
734 | * the upper layers is informed about the successful transmission. If | |
735 | * mac80211 queues have been stopped and the number of frames still to be | |
736 | * transmitted is low the queues will be opened again. | |
e85d0918 | 737 | * |
459c51ad | 738 | * Returns 1 if the frame was an ACK, 0 if it was ignored. |
e85d0918 | 739 | */ |
459c51ad DD |
740 | static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, |
741 | struct ieee80211_rx_status *stats) | |
e85d0918 | 742 | { |
7f4013f0 | 743 | struct zd_mac *mac = zd_hw_mac(hw); |
459c51ad DD |
744 | struct sk_buff *skb; |
745 | struct sk_buff_head *q; | |
746 | unsigned long flags; | |
7f4013f0 BP |
747 | int found = 0; |
748 | int i, position = 0; | |
e85d0918 | 749 | |
85365820 | 750 | if (!ieee80211_is_ack(rx_hdr->frame_control)) |
e85d0918 | 751 | return 0; |
e85d0918 | 752 | |
7f4013f0 | 753 | q = &mac->ack_wait_queue; |
459c51ad | 754 | spin_lock_irqsave(&q->lock, flags); |
47a227db | 755 | skb_queue_walk(q, skb) { |
459c51ad DD |
756 | struct ieee80211_hdr *tx_hdr; |
757 | ||
7f4013f0 BP |
758 | position ++; |
759 | ||
760 | if (mac->ack_pending && skb_queue_is_first(q, skb)) | |
761 | continue; | |
762 | ||
459c51ad | 763 | tx_hdr = (struct ieee80211_hdr *)skb->data; |
cde6901b | 764 | if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) |
459c51ad | 765 | { |
7f4013f0 BP |
766 | found = 1; |
767 | break; | |
459c51ad DD |
768 | } |
769 | } | |
7f4013f0 BP |
770 | |
771 | if (found) { | |
772 | for (i=1; i<position; i++) { | |
773 | skb = __skb_dequeue(q); | |
774 | zd_mac_tx_status(hw, skb, | |
775 | mac->ack_pending ? mac->ack_signal : 0, | |
776 | NULL); | |
777 | mac->ack_pending = 0; | |
778 | } | |
779 | ||
780 | mac->ack_pending = 1; | |
781 | mac->ack_signal = stats->signal; | |
782 | } | |
783 | ||
459c51ad DD |
784 | spin_unlock_irqrestore(&q->lock, flags); |
785 | return 1; | |
e85d0918 DD |
786 | } |
787 | ||
459c51ad | 788 | int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) |
e85d0918 | 789 | { |
459c51ad DD |
790 | struct zd_mac *mac = zd_hw_mac(hw); |
791 | struct ieee80211_rx_status stats; | |
792 | const struct rx_status *status; | |
793 | struct sk_buff *skb; | |
794 | int bad_frame = 0; | |
85365820 HH |
795 | __le16 fc; |
796 | int need_padding; | |
8318d78a JB |
797 | int i; |
798 | u8 rate; | |
db888aed | 799 | |
459c51ad DD |
800 | if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + |
801 | FCS_LEN + sizeof(struct rx_status)) | |
802 | return -EINVAL; | |
e85d0918 | 803 | |
459c51ad | 804 | memset(&stats, 0, sizeof(stats)); |
e85d0918 | 805 | |
459c51ad DD |
806 | /* Note about pass_failed_fcs and pass_ctrl access below: |
807 | * mac locking intentionally omitted here, as this is the only unlocked | |
808 | * reader and the only writer is configure_filter. Plus, if there were | |
809 | * any races accessing these variables, it wouldn't really matter. | |
810 | * If mac80211 ever provides a way for us to access filter flags | |
811 | * from outside configure_filter, we could improve on this. Also, this | |
812 | * situation may change once we implement some kind of DMA-into-skb | |
813 | * RX path. */ | |
e85d0918 | 814 | |
459c51ad DD |
815 | /* Caller has to ensure that length >= sizeof(struct rx_status). */ |
816 | status = (struct rx_status *) | |
937a049d | 817 | (buffer + (length - sizeof(struct rx_status))); |
e85d0918 | 818 | if (status->frame_status & ZD_RX_ERROR) { |
459c51ad DD |
819 | if (mac->pass_failed_fcs && |
820 | (status->frame_status & ZD_RX_CRC32_ERROR)) { | |
821 | stats.flag |= RX_FLAG_FAILED_FCS_CRC; | |
822 | bad_frame = 1; | |
823 | } else { | |
824 | return -EINVAL; | |
22d3405f | 825 | } |
e85d0918 | 826 | } |
22d3405f | 827 | |
8318d78a JB |
828 | stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; |
829 | stats.band = IEEE80211_BAND_2GHZ; | |
566bfe5a | 830 | stats.signal = status->signal_strength; |
8318d78a JB |
831 | |
832 | rate = zd_rx_rate(buffer, status); | |
833 | ||
834 | /* todo: return index in the big switches in zd_rx_rate instead */ | |
835 | for (i = 0; i < mac->band.n_bitrates; i++) | |
836 | if (rate == mac->band.bitrates[i].hw_value) | |
837 | stats.rate_idx = i; | |
459c51ad DD |
838 | |
839 | length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); | |
840 | buffer += ZD_PLCP_HEADER_SIZE; | |
841 | ||
842 | /* Except for bad frames, filter each frame to see if it is an ACK, in | |
843 | * which case our internal TX tracking is updated. Normally we then | |
844 | * bail here as there's no need to pass ACKs on up to the stack, but | |
845 | * there is also the case where the stack has requested us to pass | |
846 | * control frames on up (pass_ctrl) which we must consider. */ | |
847 | if (!bad_frame && | |
848 | filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) | |
849 | && !mac->pass_ctrl) | |
850 | return 0; | |
e85d0918 | 851 | |
42935eca | 852 | fc = get_unaligned((__le16*)buffer); |
85365820 | 853 | need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); |
9081728b MB |
854 | |
855 | skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); | |
459c51ad DD |
856 | if (skb == NULL) |
857 | return -ENOMEM; | |
9081728b MB |
858 | if (need_padding) { |
859 | /* Make sure the the payload data is 4 byte aligned. */ | |
860 | skb_reserve(skb, 2); | |
861 | } | |
862 | ||
7f4013f0 | 863 | /* FIXME : could we avoid this big memcpy ? */ |
459c51ad DD |
864 | memcpy(skb_put(skb, length), buffer, length); |
865 | ||
f1d58c25 JB |
866 | memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); |
867 | ieee80211_rx_irqsafe(hw, skb); | |
e85d0918 DD |
868 | return 0; |
869 | } | |
870 | ||
459c51ad DD |
871 | static int zd_op_add_interface(struct ieee80211_hw *hw, |
872 | struct ieee80211_if_init_conf *conf) | |
e85d0918 | 873 | { |
459c51ad | 874 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 875 | |
05c914fe JB |
876 | /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ |
877 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) | |
459c51ad | 878 | return -EOPNOTSUPP; |
e85d0918 | 879 | |
459c51ad | 880 | switch (conf->type) { |
05c914fe JB |
881 | case NL80211_IFTYPE_MONITOR: |
882 | case NL80211_IFTYPE_MESH_POINT: | |
883 | case NL80211_IFTYPE_STATION: | |
884 | case NL80211_IFTYPE_ADHOC: | |
459c51ad DD |
885 | mac->type = conf->type; |
886 | break; | |
887 | default: | |
888 | return -EOPNOTSUPP; | |
4d1feabc | 889 | } |
e85d0918 | 890 | |
459c51ad DD |
891 | return zd_write_mac_addr(&mac->chip, conf->mac_addr); |
892 | } | |
e85d0918 | 893 | |
459c51ad DD |
894 | static void zd_op_remove_interface(struct ieee80211_hw *hw, |
895 | struct ieee80211_if_init_conf *conf) | |
896 | { | |
897 | struct zd_mac *mac = zd_hw_mac(hw); | |
05c914fe | 898 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
86229f0c | 899 | zd_set_beacon_interval(&mac->chip, 0); |
459c51ad DD |
900 | zd_write_mac_addr(&mac->chip, NULL); |
901 | } | |
93137943 | 902 | |
e8975581 | 903 | static int zd_op_config(struct ieee80211_hw *hw, u32 changed) |
459c51ad DD |
904 | { |
905 | struct zd_mac *mac = zd_hw_mac(hw); | |
e8975581 JB |
906 | struct ieee80211_conf *conf = &hw->conf; |
907 | ||
8318d78a | 908 | return zd_chip_set_channel(&mac->chip, conf->channel->hw_value); |
459c51ad | 909 | } |
db888aed | 910 | |
e83a1070 | 911 | static void zd_process_intr(struct work_struct *work) |
72e77a8a LCC |
912 | { |
913 | u16 int_status; | |
914 | struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); | |
915 | ||
d63ddcec | 916 | int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer+4)); |
570a0a7c JB |
917 | if (int_status & INT_CFG_NEXT_BCN) |
918 | dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n"); | |
919 | else | |
72e77a8a LCC |
920 | dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); |
921 | ||
922 | zd_chip_enable_hwint(&mac->chip); | |
923 | } | |
924 | ||
925 | ||
459c51ad | 926 | static void set_multicast_hash_handler(struct work_struct *work) |
4d1feabc | 927 | { |
459c51ad DD |
928 | struct zd_mac *mac = |
929 | container_of(work, struct zd_mac, set_multicast_hash_work); | |
930 | struct zd_mc_hash hash; | |
4d1feabc | 931 | |
459c51ad DD |
932 | spin_lock_irq(&mac->lock); |
933 | hash = mac->multicast_hash; | |
934 | spin_unlock_irq(&mac->lock); | |
4d1feabc | 935 | |
459c51ad | 936 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
e85d0918 DD |
937 | } |
938 | ||
459c51ad | 939 | static void set_rx_filter_handler(struct work_struct *work) |
e85d0918 | 940 | { |
459c51ad DD |
941 | struct zd_mac *mac = |
942 | container_of(work, struct zd_mac, set_rx_filter_work); | |
943 | int r; | |
944 | ||
945 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
946 | r = set_rx_filter(mac); | |
947 | if (r) | |
948 | dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r); | |
e85d0918 DD |
949 | } |
950 | ||
3ac64bee JB |
951 | static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, |
952 | int mc_count, struct dev_addr_list *mclist) | |
953 | { | |
954 | struct zd_mac *mac = zd_hw_mac(hw); | |
955 | struct zd_mc_hash hash; | |
956 | int i; | |
957 | ||
958 | zd_mc_clear(&hash); | |
959 | ||
960 | for (i = 0; i < mc_count; i++) { | |
961 | if (!mclist) | |
962 | break; | |
963 | dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", mclist->dmi_addr); | |
964 | zd_mc_add_addr(&hash, mclist->dmi_addr); | |
965 | mclist = mclist->next; | |
966 | } | |
967 | ||
968 | return hash.low | ((u64)hash.high << 32); | |
969 | } | |
970 | ||
459c51ad DD |
971 | #define SUPPORTED_FIF_FLAGS \ |
972 | (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ | |
2c1a1b12 | 973 | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) |
459c51ad DD |
974 | static void zd_op_configure_filter(struct ieee80211_hw *hw, |
975 | unsigned int changed_flags, | |
976 | unsigned int *new_flags, | |
3ac64bee | 977 | u64 multicast) |
e85d0918 | 978 | { |
3ac64bee JB |
979 | struct zd_mc_hash hash = { |
980 | .low = multicast, | |
981 | .high = multicast >> 32, | |
982 | }; | |
459c51ad DD |
983 | struct zd_mac *mac = zd_hw_mac(hw); |
984 | unsigned long flags; | |
e85d0918 | 985 | |
459c51ad DD |
986 | /* Only deal with supported flags */ |
987 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
988 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
989 | ||
990 | /* changed_flags is always populated but this driver | |
991 | * doesn't support all FIF flags so its possible we don't | |
992 | * need to do anything */ | |
993 | if (!changed_flags) | |
994 | return; | |
995 | ||
3ac64bee | 996 | if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) |
459c51ad | 997 | zd_mc_add_all(&hash); |
459c51ad DD |
998 | |
999 | spin_lock_irqsave(&mac->lock, flags); | |
1000 | mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); | |
1001 | mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); | |
1002 | mac->multicast_hash = hash; | |
1003 | spin_unlock_irqrestore(&mac->lock, flags); | |
3ac64bee JB |
1004 | |
1005 | /* XXX: these can be called here now, can sleep now! */ | |
459c51ad DD |
1006 | queue_work(zd_workqueue, &mac->set_multicast_hash_work); |
1007 | ||
1008 | if (changed_flags & FIF_CONTROL) | |
1009 | queue_work(zd_workqueue, &mac->set_rx_filter_work); | |
1010 | ||
1011 | /* no handling required for FIF_OTHER_BSS as we don't currently | |
1012 | * do BSSID filtering */ | |
1013 | /* FIXME: in future it would be nice to enable the probe response | |
1014 | * filter (so that the driver doesn't see them) until | |
1015 | * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd | |
1016 | * have to schedule work to enable prbresp reception, which might | |
1017 | * happen too late. For now we'll just listen and forward them all the | |
1018 | * time. */ | |
e85d0918 DD |
1019 | } |
1020 | ||
459c51ad | 1021 | static void set_rts_cts_work(struct work_struct *work) |
e85d0918 | 1022 | { |
459c51ad DD |
1023 | struct zd_mac *mac = |
1024 | container_of(work, struct zd_mac, set_rts_cts_work); | |
1025 | unsigned long flags; | |
1026 | unsigned int short_preamble; | |
1027 | ||
1028 | mutex_lock(&mac->chip.mutex); | |
1029 | ||
1030 | spin_lock_irqsave(&mac->lock, flags); | |
1031 | mac->updating_rts_rate = 0; | |
1032 | short_preamble = mac->short_preamble; | |
1033 | spin_unlock_irqrestore(&mac->lock, flags); | |
1034 | ||
1035 | zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); | |
1036 | mutex_unlock(&mac->chip.mutex); | |
e85d0918 DD |
1037 | } |
1038 | ||
471b3efd JB |
1039 | static void zd_op_bss_info_changed(struct ieee80211_hw *hw, |
1040 | struct ieee80211_vif *vif, | |
1041 | struct ieee80211_bss_conf *bss_conf, | |
1042 | u32 changes) | |
e85d0918 | 1043 | { |
459c51ad DD |
1044 | struct zd_mac *mac = zd_hw_mac(hw); |
1045 | unsigned long flags; | |
2d0ddec5 | 1046 | int associated; |
459c51ad DD |
1047 | |
1048 | dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); | |
1049 | ||
2d0ddec5 JB |
1050 | if (mac->type == NL80211_IFTYPE_MESH_POINT || |
1051 | mac->type == NL80211_IFTYPE_ADHOC) { | |
1052 | associated = true; | |
1053 | if (changes & BSS_CHANGED_BEACON) { | |
1054 | struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); | |
1055 | ||
1056 | if (beacon) { | |
1057 | zd_mac_config_beacon(hw, beacon); | |
1058 | kfree_skb(beacon); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
1063 | u32 interval; | |
1064 | ||
1065 | if (bss_conf->enable_beacon) | |
1066 | interval = BCN_MODE_IBSS | | |
1067 | bss_conf->beacon_int; | |
1068 | else | |
1069 | interval = 0; | |
1070 | ||
1071 | zd_set_beacon_interval(&mac->chip, interval); | |
1072 | } | |
1073 | } else | |
1074 | associated = is_valid_ether_addr(bss_conf->bssid); | |
1075 | ||
1076 | spin_lock_irq(&mac->lock); | |
1077 | mac->associated = associated; | |
1078 | spin_unlock_irq(&mac->lock); | |
1079 | ||
1080 | /* TODO: do hardware bssid filtering */ | |
1081 | ||
471b3efd | 1082 | if (changes & BSS_CHANGED_ERP_PREAMBLE) { |
459c51ad | 1083 | spin_lock_irqsave(&mac->lock, flags); |
471b3efd | 1084 | mac->short_preamble = bss_conf->use_short_preamble; |
459c51ad DD |
1085 | if (!mac->updating_rts_rate) { |
1086 | mac->updating_rts_rate = 1; | |
1087 | /* FIXME: should disable TX here, until work has | |
1088 | * completed and RTS_CTS reg is updated */ | |
1089 | queue_work(zd_workqueue, &mac->set_rts_cts_work); | |
1090 | } | |
1091 | spin_unlock_irqrestore(&mac->lock, flags); | |
1092 | } | |
e85d0918 DD |
1093 | } |
1094 | ||
5fe73197 AF |
1095 | static u64 zd_op_get_tsf(struct ieee80211_hw *hw) |
1096 | { | |
1097 | struct zd_mac *mac = zd_hw_mac(hw); | |
1098 | return zd_chip_get_tsf(&mac->chip); | |
1099 | } | |
1100 | ||
459c51ad DD |
1101 | static const struct ieee80211_ops zd_ops = { |
1102 | .tx = zd_op_tx, | |
1103 | .start = zd_op_start, | |
1104 | .stop = zd_op_stop, | |
1105 | .add_interface = zd_op_add_interface, | |
1106 | .remove_interface = zd_op_remove_interface, | |
1107 | .config = zd_op_config, | |
3ac64bee | 1108 | .prepare_multicast = zd_op_prepare_multicast, |
459c51ad | 1109 | .configure_filter = zd_op_configure_filter, |
471b3efd | 1110 | .bss_info_changed = zd_op_bss_info_changed, |
5fe73197 | 1111 | .get_tsf = zd_op_get_tsf, |
459c51ad DD |
1112 | }; |
1113 | ||
1114 | struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) | |
e85d0918 | 1115 | { |
459c51ad DD |
1116 | struct zd_mac *mac; |
1117 | struct ieee80211_hw *hw; | |
e85d0918 | 1118 | |
459c51ad DD |
1119 | hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); |
1120 | if (!hw) { | |
1121 | dev_dbg_f(&intf->dev, "out of memory\n"); | |
1122 | return NULL; | |
db888aed | 1123 | } |
459c51ad DD |
1124 | |
1125 | mac = zd_hw_mac(hw); | |
1126 | ||
1127 | memset(mac, 0, sizeof(*mac)); | |
1128 | spin_lock_init(&mac->lock); | |
1129 | mac->hw = hw; | |
1130 | ||
05c914fe | 1131 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
459c51ad DD |
1132 | |
1133 | memcpy(mac->channels, zd_channels, sizeof(zd_channels)); | |
1134 | memcpy(mac->rates, zd_rates, sizeof(zd_rates)); | |
8318d78a JB |
1135 | mac->band.n_bitrates = ARRAY_SIZE(zd_rates); |
1136 | mac->band.bitrates = mac->rates; | |
1137 | mac->band.n_channels = ARRAY_SIZE(zd_channels); | |
1138 | mac->band.channels = mac->channels; | |
1139 | ||
1140 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band; | |
1141 | ||
72e77a8a | 1142 | hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | |
7fee5372 | 1143 | IEEE80211_HW_SIGNAL_UNSPEC; |
459c51ad | 1144 | |
f59ac048 LR |
1145 | hw->wiphy->interface_modes = |
1146 | BIT(NL80211_IFTYPE_MESH_POINT) | | |
1147 | BIT(NL80211_IFTYPE_STATION) | | |
1148 | BIT(NL80211_IFTYPE_ADHOC); | |
1149 | ||
566bfe5a | 1150 | hw->max_signal = 100; |
459c51ad DD |
1151 | hw->queues = 1; |
1152 | hw->extra_tx_headroom = sizeof(struct zd_ctrlset); | |
1153 | ||
7f4013f0 BP |
1154 | /* |
1155 | * Tell mac80211 that we support multi rate retries | |
1156 | */ | |
1157 | hw->max_rates = IEEE80211_TX_MAX_RATES; | |
1158 | hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ | |
1159 | ||
459c51ad | 1160 | skb_queue_head_init(&mac->ack_wait_queue); |
7f4013f0 | 1161 | mac->ack_pending = 0; |
459c51ad | 1162 | |
459c51ad DD |
1163 | zd_chip_init(&mac->chip, hw, intf); |
1164 | housekeeping_init(mac); | |
1165 | INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler); | |
1166 | INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work); | |
1167 | INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler); | |
72e77a8a | 1168 | INIT_WORK(&mac->process_intr, zd_process_intr); |
459c51ad DD |
1169 | |
1170 | SET_IEEE80211_DEV(hw, &intf->dev); | |
1171 | return hw; | |
e85d0918 DD |
1172 | } |
1173 | ||
583afd1e UK |
1174 | #define LINK_LED_WORK_DELAY HZ |
1175 | ||
c4028958 | 1176 | static void link_led_handler(struct work_struct *work) |
583afd1e | 1177 | { |
c4028958 DH |
1178 | struct zd_mac *mac = |
1179 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); | |
583afd1e | 1180 | struct zd_chip *chip = &mac->chip; |
583afd1e UK |
1181 | int is_associated; |
1182 | int r; | |
1183 | ||
1184 | spin_lock_irq(&mac->lock); | |
459c51ad | 1185 | is_associated = mac->associated; |
583afd1e UK |
1186 | spin_unlock_irq(&mac->lock); |
1187 | ||
1188 | r = zd_chip_control_leds(chip, | |
14b46c8a | 1189 | is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); |
583afd1e | 1190 | if (r) |
459c51ad | 1191 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); |
583afd1e UK |
1192 | |
1193 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1194 | LINK_LED_WORK_DELAY); | |
1195 | } | |
1196 | ||
1197 | static void housekeeping_init(struct zd_mac *mac) | |
1198 | { | |
c4028958 | 1199 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
583afd1e UK |
1200 | } |
1201 | ||
1202 | static void housekeeping_enable(struct zd_mac *mac) | |
1203 | { | |
1204 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1205 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1206 | 0); | |
1207 | } | |
1208 | ||
1209 | static void housekeeping_disable(struct zd_mac *mac) | |
1210 | { | |
1211 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1212 | cancel_rearming_delayed_workqueue(zd_workqueue, | |
1213 | &mac->housekeeping.link_led_work); | |
14b46c8a | 1214 | zd_chip_control_leds(&mac->chip, ZD_LED_OFF); |
583afd1e | 1215 | } |