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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> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
e85d0918 DD |
26 | #include <linux/usb.h> |
27 | #include <linux/jiffies.h> | |
28 | #include <net/ieee80211_radiotap.h> | |
29 | ||
30 | #include "zd_def.h" | |
31 | #include "zd_chip.h" | |
32 | #include "zd_mac.h" | |
e85d0918 | 33 | #include "zd_rf.h" |
e85d0918 | 34 | |
e83a1070 LR |
35 | struct zd_reg_alpha2_map { |
36 | u32 reg; | |
37 | char alpha2[2]; | |
38 | }; | |
39 | ||
40 | static struct zd_reg_alpha2_map reg_alpha2_map[] = { | |
41 | { ZD_REGDOMAIN_FCC, "US" }, | |
42 | { ZD_REGDOMAIN_IC, "CA" }, | |
43 | { ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */ | |
44 | { ZD_REGDOMAIN_JAPAN, "JP" }, | |
45 | { ZD_REGDOMAIN_JAPAN_ADD, "JP" }, | |
46 | { ZD_REGDOMAIN_SPAIN, "ES" }, | |
47 | { ZD_REGDOMAIN_FRANCE, "FR" }, | |
48 | }; | |
49 | ||
459c51ad DD |
50 | /* This table contains the hardware specific values for the modulation rates. */ |
51 | static const struct ieee80211_rate zd_rates[] = { | |
8318d78a JB |
52 | { .bitrate = 10, |
53 | .hw_value = ZD_CCK_RATE_1M, }, | |
54 | { .bitrate = 20, | |
55 | .hw_value = ZD_CCK_RATE_2M, | |
56 | .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, | |
57 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
58 | { .bitrate = 55, | |
59 | .hw_value = ZD_CCK_RATE_5_5M, | |
60 | .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, | |
61 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
62 | { .bitrate = 110, | |
63 | .hw_value = ZD_CCK_RATE_11M, | |
64 | .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, | |
65 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
66 | { .bitrate = 60, | |
67 | .hw_value = ZD_OFDM_RATE_6M, | |
68 | .flags = 0 }, | |
69 | { .bitrate = 90, | |
70 | .hw_value = ZD_OFDM_RATE_9M, | |
71 | .flags = 0 }, | |
72 | { .bitrate = 120, | |
73 | .hw_value = ZD_OFDM_RATE_12M, | |
74 | .flags = 0 }, | |
75 | { .bitrate = 180, | |
76 | .hw_value = ZD_OFDM_RATE_18M, | |
77 | .flags = 0 }, | |
78 | { .bitrate = 240, | |
79 | .hw_value = ZD_OFDM_RATE_24M, | |
80 | .flags = 0 }, | |
81 | { .bitrate = 360, | |
82 | .hw_value = ZD_OFDM_RATE_36M, | |
83 | .flags = 0 }, | |
84 | { .bitrate = 480, | |
85 | .hw_value = ZD_OFDM_RATE_48M, | |
86 | .flags = 0 }, | |
87 | { .bitrate = 540, | |
88 | .hw_value = ZD_OFDM_RATE_54M, | |
89 | .flags = 0 }, | |
459c51ad DD |
90 | }; |
91 | ||
7f4013f0 BP |
92 | /* |
93 | * Zydas retry rates table. Each line is listed in the same order as | |
94 | * in zd_rates[] and contains all the rate used when a packet is sent | |
95 | * starting with a given rates. Let's consider an example : | |
96 | * | |
97 | * "11 Mbits : 4, 3, 2, 1, 0" means : | |
98 | * - packet is sent using 4 different rates | |
99 | * - 1st rate is index 3 (ie 11 Mbits) | |
100 | * - 2nd rate is index 2 (ie 5.5 Mbits) | |
101 | * - 3rd rate is index 1 (ie 2 Mbits) | |
102 | * - 4th rate is index 0 (ie 1 Mbits) | |
103 | */ | |
104 | ||
105 | static const struct tx_retry_rate zd_retry_rates[] = { | |
106 | { /* 1 Mbits */ 1, { 0 }}, | |
107 | { /* 2 Mbits */ 2, { 1, 0 }}, | |
108 | { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, | |
109 | { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, | |
110 | { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, | |
111 | { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, | |
112 | { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, | |
113 | { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, | |
114 | { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, | |
115 | { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, | |
116 | { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, | |
117 | { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} | |
118 | }; | |
119 | ||
459c51ad | 120 | static const struct ieee80211_channel zd_channels[] = { |
8318d78a JB |
121 | { .center_freq = 2412, .hw_value = 1 }, |
122 | { .center_freq = 2417, .hw_value = 2 }, | |
123 | { .center_freq = 2422, .hw_value = 3 }, | |
124 | { .center_freq = 2427, .hw_value = 4 }, | |
125 | { .center_freq = 2432, .hw_value = 5 }, | |
126 | { .center_freq = 2437, .hw_value = 6 }, | |
127 | { .center_freq = 2442, .hw_value = 7 }, | |
128 | { .center_freq = 2447, .hw_value = 8 }, | |
129 | { .center_freq = 2452, .hw_value = 9 }, | |
130 | { .center_freq = 2457, .hw_value = 10 }, | |
131 | { .center_freq = 2462, .hw_value = 11 }, | |
132 | { .center_freq = 2467, .hw_value = 12 }, | |
133 | { .center_freq = 2472, .hw_value = 13 }, | |
134 | { .center_freq = 2484, .hw_value = 14 }, | |
459c51ad | 135 | }; |
e85d0918 | 136 | |
583afd1e UK |
137 | static void housekeeping_init(struct zd_mac *mac); |
138 | static void housekeeping_enable(struct zd_mac *mac); | |
139 | static void housekeeping_disable(struct zd_mac *mac); | |
140 | ||
e83a1070 LR |
141 | static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
142 | { | |
143 | unsigned int i; | |
144 | struct zd_reg_alpha2_map *reg_map; | |
145 | for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { | |
146 | reg_map = ®_alpha2_map[i]; | |
147 | if (regdomain == reg_map->reg) { | |
148 | alpha2[0] = reg_map->alpha2[0]; | |
149 | alpha2[1] = reg_map->alpha2[1]; | |
150 | return 0; | |
151 | } | |
152 | } | |
153 | return 1; | |
154 | } | |
155 | ||
459c51ad | 156 | int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
e85d0918 DD |
157 | { |
158 | int r; | |
e85d0918 | 159 | u8 addr[ETH_ALEN]; |
459c51ad | 160 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed DD |
161 | |
162 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); | |
163 | if (r) | |
164 | return r; | |
165 | ||
459c51ad DD |
166 | SET_IEEE80211_PERM_ADDR(hw, addr); |
167 | ||
74553aed DD |
168 | return 0; |
169 | } | |
170 | ||
459c51ad | 171 | int zd_mac_init_hw(struct ieee80211_hw *hw) |
74553aed DD |
172 | { |
173 | int r; | |
459c51ad | 174 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed | 175 | struct zd_chip *chip = &mac->chip; |
e83a1070 | 176 | char alpha2[2]; |
e85d0918 DD |
177 | u8 default_regdomain; |
178 | ||
179 | r = zd_chip_enable_int(chip); | |
180 | if (r) | |
181 | goto out; | |
74553aed | 182 | r = zd_chip_init_hw(chip); |
e85d0918 DD |
183 | if (r) |
184 | goto disable_int; | |
185 | ||
e85d0918 | 186 | ZD_ASSERT(!irqs_disabled()); |
e85d0918 DD |
187 | |
188 | r = zd_read_regdomain(chip, &default_regdomain); | |
189 | if (r) | |
190 | goto disable_int; | |
e85d0918 DD |
191 | spin_lock_irq(&mac->lock); |
192 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
193 | spin_unlock_irq(&mac->lock); | |
e85d0918 | 194 | |
40da08bc DD |
195 | /* We must inform the device that we are doing encryption/decryption in |
196 | * software at the moment. */ | |
197 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
198 | if (r) |
199 | goto disable_int; | |
200 | ||
e83a1070 | 201 | r = zd_reg2alpha2(mac->regdomain, alpha2); |
fe33eb39 LR |
202 | if (r) |
203 | goto disable_int; | |
e85d0918 | 204 | |
fe33eb39 | 205 | r = regulatory_hint(hw->wiphy, alpha2); |
e85d0918 DD |
206 | disable_int: |
207 | zd_chip_disable_int(chip); | |
208 | out: | |
209 | return r; | |
210 | } | |
211 | ||
212 | void zd_mac_clear(struct zd_mac *mac) | |
213 | { | |
9cdac965 | 214 | flush_workqueue(zd_workqueue); |
e85d0918 | 215 | zd_chip_clear(&mac->chip); |
c48cf125 UK |
216 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
217 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); | |
e85d0918 DD |
218 | } |
219 | ||
c5691235 | 220 | static int set_rx_filter(struct zd_mac *mac) |
e85d0918 | 221 | { |
459c51ad DD |
222 | unsigned long flags; |
223 | u32 filter = STA_RX_FILTER; | |
e85d0918 | 224 | |
459c51ad DD |
225 | spin_lock_irqsave(&mac->lock, flags); |
226 | if (mac->pass_ctrl) | |
227 | filter |= RX_FILTER_CTRL; | |
228 | spin_unlock_irqrestore(&mac->lock, flags); | |
229 | ||
230 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
c5691235 UK |
231 | } |
232 | ||
233 | static int set_mc_hash(struct zd_mac *mac) | |
234 | { | |
235 | struct zd_mc_hash hash; | |
c5691235 | 236 | zd_mc_clear(&hash); |
c5691235 UK |
237 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
238 | } | |
239 | ||
459c51ad | 240 | static int zd_op_start(struct ieee80211_hw *hw) |
e85d0918 | 241 | { |
459c51ad | 242 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 243 | struct zd_chip *chip = &mac->chip; |
74553aed | 244 | struct zd_usb *usb = &chip->usb; |
e85d0918 DD |
245 | int r; |
246 | ||
74553aed DD |
247 | if (!usb->initialized) { |
248 | r = zd_usb_init_hw(usb); | |
249 | if (r) | |
250 | goto out; | |
251 | } | |
252 | ||
e85d0918 DD |
253 | r = zd_chip_enable_int(chip); |
254 | if (r < 0) | |
255 | goto out; | |
256 | ||
257 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
258 | if (r < 0) | |
259 | goto disable_int; | |
c5691235 | 260 | r = set_rx_filter(mac); |
c5691235 UK |
261 | if (r) |
262 | goto disable_int; | |
263 | r = set_mc_hash(mac); | |
e85d0918 DD |
264 | if (r) |
265 | goto disable_int; | |
266 | r = zd_chip_switch_radio_on(chip); | |
267 | if (r < 0) | |
268 | goto disable_int; | |
459c51ad | 269 | r = zd_chip_enable_rxtx(chip); |
e85d0918 DD |
270 | if (r < 0) |
271 | goto disable_radio; | |
272 | r = zd_chip_enable_hwint(chip); | |
273 | if (r < 0) | |
459c51ad | 274 | goto disable_rxtx; |
e85d0918 | 275 | |
583afd1e | 276 | housekeeping_enable(mac); |
e85d0918 | 277 | return 0; |
459c51ad DD |
278 | disable_rxtx: |
279 | zd_chip_disable_rxtx(chip); | |
e85d0918 DD |
280 | disable_radio: |
281 | zd_chip_switch_radio_off(chip); | |
282 | disable_int: | |
283 | zd_chip_disable_int(chip); | |
284 | out: | |
285 | return r; | |
286 | } | |
287 | ||
459c51ad DD |
288 | static void zd_op_stop(struct ieee80211_hw *hw) |
289 | { | |
290 | struct zd_mac *mac = zd_hw_mac(hw); | |
291 | struct zd_chip *chip = &mac->chip; | |
292 | struct sk_buff *skb; | |
293 | struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; | |
c9a4b35d | 294 | |
459c51ad | 295 | /* The order here deliberately is a little different from the open() |
e85d0918 | 296 | * method, since we need to make sure there is no opportunity for RX |
459c51ad | 297 | * frames to be processed by mac80211 after we have stopped it. |
e85d0918 DD |
298 | */ |
299 | ||
459c51ad | 300 | zd_chip_disable_rxtx(chip); |
583afd1e | 301 | housekeeping_disable(mac); |
b1382ede | 302 | flush_workqueue(zd_workqueue); |
b1382ede | 303 | |
e85d0918 DD |
304 | zd_chip_disable_hwint(chip); |
305 | zd_chip_switch_radio_off(chip); | |
306 | zd_chip_disable_int(chip); | |
307 | ||
e85d0918 | 308 | |
459c51ad | 309 | while ((skb = skb_dequeue(ack_wait_queue))) |
e039fa4a | 310 | dev_kfree_skb_any(skb); |
e85d0918 DD |
311 | } |
312 | ||
459c51ad | 313 | /** |
7f4013f0 | 314 | * zd_mac_tx_status - reports tx status of a packet if required |
459c51ad DD |
315 | * @hw - a &struct ieee80211_hw pointer |
316 | * @skb - a sk-buffer | |
e039fa4a JB |
317 | * @flags: extra flags to set in the TX status info |
318 | * @ackssi: ACK signal strength | |
73ac36ea | 319 | * @success - True for successful transmission of the frame |
459c51ad DD |
320 | * |
321 | * This information calls ieee80211_tx_status_irqsafe() if required by the | |
322 | * control information. It copies the control information into the status | |
323 | * information. | |
324 | * | |
325 | * If no status information has been requested, the skb is freed. | |
326 | */ | |
7f4013f0 BP |
327 | static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
328 | int ackssi, struct tx_status *tx_status) | |
b1382ede | 329 | { |
e039fa4a | 330 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7f4013f0 BP |
331 | int i; |
332 | int success = 1, retry = 1; | |
333 | int first_idx; | |
334 | const struct tx_retry_rate *retries; | |
e039fa4a | 335 | |
e6a9854b | 336 | ieee80211_tx_info_clear_status(info); |
b1382ede | 337 | |
7f4013f0 BP |
338 | if (tx_status) { |
339 | success = !tx_status->failure; | |
340 | retry = tx_status->retry + success; | |
341 | } | |
342 | ||
343 | if (success) { | |
344 | /* success */ | |
e6a9854b | 345 | info->flags |= IEEE80211_TX_STAT_ACK; |
7f4013f0 BP |
346 | } else { |
347 | /* failure */ | |
348 | info->flags &= ~IEEE80211_TX_STAT_ACK; | |
349 | } | |
350 | ||
351 | first_idx = info->status.rates[0].idx; | |
352 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
353 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 354 | ZD_ASSERT(1 <= retry && retry <= retries->count); |
7f4013f0 BP |
355 | |
356 | info->status.rates[0].idx = retries->rate[0]; | |
357 | info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); | |
358 | ||
359 | for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { | |
360 | info->status.rates[i].idx = retries->rate[i]; | |
361 | info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); | |
362 | } | |
363 | for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { | |
86baf712 | 364 | info->status.rates[i].idx = retries->rate[retry - 1]; |
7f4013f0 BP |
365 | info->status.rates[i].count = 1; // (success ? 1:2); |
366 | } | |
367 | if (i<IEEE80211_TX_MAX_RATES) | |
368 | info->status.rates[i].idx = -1; /* terminate */ | |
369 | ||
e039fa4a JB |
370 | info->status.ack_signal = ackssi; |
371 | ieee80211_tx_status_irqsafe(hw, skb); | |
b1382ede DD |
372 | } |
373 | ||
459c51ad DD |
374 | /** |
375 | * zd_mac_tx_failed - callback for failed frames | |
376 | * @dev: the mac80211 wireless device | |
377 | * | |
303863f4 | 378 | * This function is called if a frame couldn't be successfully |
459c51ad DD |
379 | * transferred. The first frame from the tx queue, will be selected and |
380 | * reported as error to the upper layers. | |
381 | */ | |
7f4013f0 | 382 | void zd_mac_tx_failed(struct urb *urb) |
b1382ede | 383 | { |
7f4013f0 BP |
384 | struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); |
385 | struct zd_mac *mac = zd_hw_mac(hw); | |
386 | struct sk_buff_head *q = &mac->ack_wait_queue; | |
459c51ad | 387 | struct sk_buff *skb; |
7f4013f0 BP |
388 | struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; |
389 | unsigned long flags; | |
390 | int success = !tx_status->failure; | |
391 | int retry = tx_status->retry + success; | |
392 | int found = 0; | |
393 | int i, position = 0; | |
b1382ede | 394 | |
7f4013f0 BP |
395 | q = &mac->ack_wait_queue; |
396 | spin_lock_irqsave(&q->lock, flags); | |
397 | ||
398 | skb_queue_walk(q, skb) { | |
399 | struct ieee80211_hdr *tx_hdr; | |
400 | struct ieee80211_tx_info *info; | |
401 | int first_idx, final_idx; | |
402 | const struct tx_retry_rate *retries; | |
403 | u8 final_rate; | |
404 | ||
405 | position ++; | |
406 | ||
407 | /* if the hardware reports a failure and we had a 802.11 ACK | |
408 | * pending, then we skip the first skb when searching for a | |
409 | * matching frame */ | |
410 | if (tx_status->failure && mac->ack_pending && | |
411 | skb_queue_is_first(q, skb)) { | |
412 | continue; | |
413 | } | |
414 | ||
415 | tx_hdr = (struct ieee80211_hdr *)skb->data; | |
416 | ||
417 | /* we skip all frames not matching the reported destination */ | |
418 | if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) { | |
419 | continue; | |
420 | } | |
421 | ||
422 | /* we skip all frames not matching the reported final rate */ | |
5078ed50 | 423 | |
7f4013f0 BP |
424 | info = IEEE80211_SKB_CB(skb); |
425 | first_idx = info->status.rates[0].idx; | |
426 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
427 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 428 | if (retry <= 0 || retry > retries->count) |
7f4013f0 | 429 | continue; |
7f4013f0 | 430 | |
86baf712 | 431 | final_idx = retries->rate[retry - 1]; |
7f4013f0 BP |
432 | final_rate = zd_rates[final_idx].hw_value; |
433 | ||
434 | if (final_rate != tx_status->rate) { | |
435 | continue; | |
436 | } | |
437 | ||
438 | found = 1; | |
439 | break; | |
440 | } | |
441 | ||
442 | if (found) { | |
443 | for (i=1; i<=position; i++) { | |
444 | skb = __skb_dequeue(q); | |
445 | zd_mac_tx_status(hw, skb, | |
446 | mac->ack_pending ? mac->ack_signal : 0, | |
447 | i == position ? tx_status : NULL); | |
448 | mac->ack_pending = 0; | |
449 | } | |
450 | } | |
451 | ||
452 | spin_unlock_irqrestore(&q->lock, flags); | |
b1382ede DD |
453 | } |
454 | ||
459c51ad DD |
455 | /** |
456 | * zd_mac_tx_to_dev - callback for USB layer | |
457 | * @skb: a &sk_buff pointer | |
458 | * @error: error value, 0 if transmission successful | |
459 | * | |
460 | * Informs the MAC layer that the frame has successfully transferred to the | |
461 | * device. If an ACK is required and the transfer to the device has been | |
462 | * successful, the packets are put on the @ack_wait_queue with | |
463 | * the control set removed. | |
464 | */ | |
465 | void zd_mac_tx_to_dev(struct sk_buff *skb, int error) | |
466 | { | |
e039fa4a | 467 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b | 468 | struct ieee80211_hw *hw = info->rate_driver_data[0]; |
7f4013f0 BP |
469 | struct zd_mac *mac = zd_hw_mac(hw); |
470 | ||
471 | ieee80211_tx_info_clear_status(info); | |
b1382ede | 472 | |
e039fa4a JB |
473 | skb_pull(skb, sizeof(struct zd_ctrlset)); |
474 | if (unlikely(error || | |
475 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) { | |
7f4013f0 BP |
476 | /* |
477 | * FIXME : do we need to fill in anything ? | |
478 | */ | |
479 | ieee80211_tx_status_irqsafe(hw, skb); | |
459c51ad | 480 | } else { |
7f4013f0 | 481 | struct sk_buff_head *q = &mac->ack_wait_queue; |
e039fa4a JB |
482 | |
483 | skb_queue_tail(q, skb); | |
7f4013f0 BP |
484 | while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { |
485 | zd_mac_tx_status(hw, skb_dequeue(q), | |
486 | mac->ack_pending ? mac->ack_signal : 0, | |
487 | NULL); | |
488 | mac->ack_pending = 0; | |
489 | } | |
e85d0918 | 490 | } |
e85d0918 DD |
491 | } |
492 | ||
b1cd8416 | 493 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 | 494 | { |
64f222cc | 495 | /* ZD_PURE_RATE() must be used to remove the modulation type flag of |
459c51ad DD |
496 | * the zd-rate values. |
497 | */ | |
e85d0918 | 498 | static const u8 rate_divisor[] = { |
459c51ad DD |
499 | [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, |
500 | [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, | |
501 | /* Bits must be doubled. */ | |
502 | [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, | |
503 | [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, | |
504 | [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, | |
505 | [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, | |
506 | [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, | |
507 | [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, | |
508 | [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, | |
509 | [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, | |
510 | [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, | |
511 | [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, | |
e85d0918 DD |
512 | }; |
513 | ||
514 | u32 bits = (u32)tx_length * 8; | |
515 | u32 divisor; | |
516 | ||
64f222cc | 517 | divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; |
e85d0918 DD |
518 | if (divisor == 0) |
519 | return -EINVAL; | |
520 | ||
b1cd8416 DD |
521 | switch (zd_rate) { |
522 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
523 | bits = (2*bits) + 10; /* round up to the next integer */ |
524 | break; | |
b1cd8416 | 525 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
526 | if (service) { |
527 | u32 t = bits % 11; | |
528 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
529 | if (0 < t && t <= 3) { | |
530 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
531 | } | |
532 | } | |
533 | bits += 10; /* round up to the next integer */ | |
534 | break; | |
535 | } | |
536 | ||
537 | return bits/divisor; | |
538 | } | |
539 | ||
e85d0918 | 540 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
e6a9854b JB |
541 | struct ieee80211_hdr *header, |
542 | struct ieee80211_tx_info *info) | |
e85d0918 | 543 | { |
e85d0918 | 544 | /* |
b1382ede | 545 | * CONTROL TODO: |
e85d0918 DD |
546 | * - if backoff needed, enable bit 0 |
547 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
548 | */ |
549 | ||
550 | cs->control = 0; | |
551 | ||
552 | /* First fragment */ | |
e6a9854b | 553 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
e85d0918 DD |
554 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
555 | ||
13bdcd90 GS |
556 | /* No ACK expected (multicast, etc.) */ |
557 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
558 | cs->control |= ZD_CS_NO_ACK; | |
e85d0918 DD |
559 | |
560 | /* PS-POLL */ | |
85365820 | 561 | if (ieee80211_is_pspoll(header->frame_control)) |
e85d0918 DD |
562 | cs->control |= ZD_CS_PS_POLL_FRAME; |
563 | ||
e6a9854b | 564 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b1382ede DD |
565 | cs->control |= ZD_CS_RTS; |
566 | ||
e6a9854b | 567 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
b1382ede | 568 | cs->control |= ZD_CS_SELF_CTS; |
e85d0918 DD |
569 | |
570 | /* FIXME: Management frame? */ | |
571 | } | |
572 | ||
f2cae6c5 | 573 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon) |
72e77a8a LCC |
574 | { |
575 | struct zd_mac *mac = zd_hw_mac(hw); | |
f2cae6c5 | 576 | int r; |
72e77a8a LCC |
577 | u32 tmp, j = 0; |
578 | /* 4 more bytes for tail CRC */ | |
579 | u32 full_len = beacon->len + 4; | |
f2cae6c5 DD |
580 | |
581 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0); | |
582 | if (r < 0) | |
583 | return r; | |
584 | r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); | |
585 | if (r < 0) | |
586 | return r; | |
587 | ||
72e77a8a | 588 | while (tmp & 0x2) { |
f2cae6c5 DD |
589 | r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp); |
590 | if (r < 0) | |
591 | return r; | |
72e77a8a LCC |
592 | if ((++j % 100) == 0) { |
593 | printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n"); | |
594 | if (j >= 500) { | |
595 | printk(KERN_ERR "Giving up beacon config.\n"); | |
f2cae6c5 | 596 | return -ETIMEDOUT; |
72e77a8a LCC |
597 | } |
598 | } | |
599 | msleep(1); | |
600 | } | |
601 | ||
f2cae6c5 DD |
602 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1); |
603 | if (r < 0) | |
604 | return r; | |
605 | if (zd_chip_is_zd1211b(&mac->chip)) { | |
606 | r = zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1); | |
607 | if (r < 0) | |
608 | return r; | |
609 | } | |
72e77a8a | 610 | |
f2cae6c5 DD |
611 | for (j = 0 ; j < beacon->len; j++) { |
612 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, | |
72e77a8a | 613 | *((u8 *)(beacon->data + j))); |
f2cae6c5 DD |
614 | if (r < 0) |
615 | return r; | |
616 | } | |
72e77a8a | 617 | |
f2cae6c5 DD |
618 | for (j = 0; j < 4; j++) { |
619 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0); | |
620 | if (r < 0) | |
621 | return r; | |
622 | } | |
623 | ||
624 | r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1); | |
625 | if (r < 0) | |
626 | return r; | |
72e77a8a | 627 | |
72e77a8a LCC |
628 | /* 802.11b/g 2.4G CCK 1Mb |
629 | * 802.11a, not yet implemented, uses different values (see GPL vendor | |
630 | * driver) | |
631 | */ | |
f2cae6c5 | 632 | return zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 | |
72e77a8a LCC |
633 | (full_len << 19)); |
634 | } | |
635 | ||
e85d0918 | 636 | static int fill_ctrlset(struct zd_mac *mac, |
e039fa4a | 637 | struct sk_buff *skb) |
e85d0918 DD |
638 | { |
639 | int r; | |
459c51ad DD |
640 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
641 | unsigned int frag_len = skb->len + FCS_LEN; | |
e85d0918 | 642 | unsigned int packet_length; |
2e92e6f2 | 643 | struct ieee80211_rate *txrate; |
e85d0918 DD |
644 | struct zd_ctrlset *cs = (struct zd_ctrlset *) |
645 | skb_push(skb, sizeof(struct zd_ctrlset)); | |
e039fa4a | 646 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 | 647 | |
e85d0918 | 648 | ZD_ASSERT(frag_len <= 0xffff); |
e85d0918 | 649 | |
e039fa4a | 650 | txrate = ieee80211_get_tx_rate(mac->hw, info); |
2e92e6f2 JB |
651 | |
652 | cs->modulation = txrate->hw_value; | |
e6a9854b | 653 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
2e92e6f2 | 654 | cs->modulation = txrate->hw_value_short; |
e85d0918 DD |
655 | |
656 | cs->tx_length = cpu_to_le16(frag_len); | |
657 | ||
e6a9854b | 658 | cs_set_control(mac, cs, hdr, info); |
e85d0918 DD |
659 | |
660 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
661 | ZD_ASSERT(packet_length <= 0xffff); | |
662 | /* ZD1211B: Computing the length difference this way, gives us | |
663 | * flexibility to compute the packet length. | |
664 | */ | |
74553aed | 665 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
e85d0918 DD |
666 | packet_length - frag_len : packet_length); |
667 | ||
668 | /* | |
669 | * CURRENT LENGTH: | |
670 | * - transmit frame length in microseconds | |
671 | * - seems to be derived from frame length | |
672 | * - see Cal_Us_Service() in zdinlinef.h | |
673 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
674 | * - bTxBurstEnable is never set in the vendor driver | |
675 | * | |
676 | * SERVICE: | |
677 | * - "for PLCP configuration" | |
678 | * - always 0 except in some situations at 802.11b 11M | |
679 | * - see line 53 of zdinlinef.h | |
680 | */ | |
681 | cs->service = 0; | |
64f222cc | 682 | r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), |
e85d0918 DD |
683 | le16_to_cpu(cs->tx_length)); |
684 | if (r < 0) | |
685 | return r; | |
686 | cs->current_length = cpu_to_le16(r); | |
459c51ad | 687 | cs->next_frame_length = 0; |
e85d0918 DD |
688 | |
689 | return 0; | |
690 | } | |
691 | ||
459c51ad DD |
692 | /** |
693 | * zd_op_tx - transmits a network frame to the device | |
694 | * | |
695 | * @dev: mac80211 hardware device | |
696 | * @skb: socket buffer | |
697 | * @control: the control structure | |
698 | * | |
699 | * This function transmit an IEEE 802.11 network frame to the device. The | |
700 | * control block of the skbuff will be initialized. If necessary the incoming | |
701 | * mac80211 queues will be stopped. | |
702 | */ | |
e039fa4a | 703 | static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
e85d0918 | 704 | { |
459c51ad | 705 | struct zd_mac *mac = zd_hw_mac(hw); |
e039fa4a | 706 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
459c51ad | 707 | int r; |
e85d0918 | 708 | |
e039fa4a | 709 | r = fill_ctrlset(mac, skb); |
459c51ad | 710 | if (r) |
640c65ea | 711 | goto fail; |
e85d0918 | 712 | |
e6a9854b | 713 | info->rate_driver_data[0] = hw; |
e039fa4a | 714 | |
459c51ad | 715 | r = zd_usb_tx(&mac->chip.usb, skb); |
e039fa4a | 716 | if (r) |
640c65ea JM |
717 | goto fail; |
718 | return 0; | |
719 | ||
720 | fail: | |
721 | dev_kfree_skb(skb); | |
e85d0918 DD |
722 | return 0; |
723 | } | |
724 | ||
459c51ad DD |
725 | /** |
726 | * filter_ack - filters incoming packets for acknowledgements | |
727 | * @dev: the mac80211 device | |
728 | * @rx_hdr: received header | |
729 | * @stats: the status for the received packet | |
741fec53 | 730 | * |
459c51ad DD |
731 | * This functions looks for ACK packets and tries to match them with the |
732 | * frames in the tx queue. If a match is found the frame will be dequeued and | |
733 | * the upper layers is informed about the successful transmission. If | |
734 | * mac80211 queues have been stopped and the number of frames still to be | |
735 | * transmitted is low the queues will be opened again. | |
e85d0918 | 736 | * |
459c51ad | 737 | * Returns 1 if the frame was an ACK, 0 if it was ignored. |
e85d0918 | 738 | */ |
459c51ad DD |
739 | static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, |
740 | struct ieee80211_rx_status *stats) | |
e85d0918 | 741 | { |
7f4013f0 | 742 | struct zd_mac *mac = zd_hw_mac(hw); |
459c51ad DD |
743 | struct sk_buff *skb; |
744 | struct sk_buff_head *q; | |
745 | unsigned long flags; | |
7f4013f0 BP |
746 | int found = 0; |
747 | int i, position = 0; | |
e85d0918 | 748 | |
85365820 | 749 | if (!ieee80211_is_ack(rx_hdr->frame_control)) |
e85d0918 | 750 | return 0; |
e85d0918 | 751 | |
7f4013f0 | 752 | q = &mac->ack_wait_queue; |
459c51ad | 753 | spin_lock_irqsave(&q->lock, flags); |
47a227db | 754 | skb_queue_walk(q, skb) { |
459c51ad DD |
755 | struct ieee80211_hdr *tx_hdr; |
756 | ||
7f4013f0 BP |
757 | position ++; |
758 | ||
759 | if (mac->ack_pending && skb_queue_is_first(q, skb)) | |
760 | continue; | |
761 | ||
459c51ad | 762 | tx_hdr = (struct ieee80211_hdr *)skb->data; |
cde6901b | 763 | if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) |
459c51ad | 764 | { |
7f4013f0 BP |
765 | found = 1; |
766 | break; | |
459c51ad DD |
767 | } |
768 | } | |
7f4013f0 BP |
769 | |
770 | if (found) { | |
771 | for (i=1; i<position; i++) { | |
772 | skb = __skb_dequeue(q); | |
773 | zd_mac_tx_status(hw, skb, | |
774 | mac->ack_pending ? mac->ack_signal : 0, | |
775 | NULL); | |
776 | mac->ack_pending = 0; | |
777 | } | |
778 | ||
779 | mac->ack_pending = 1; | |
780 | mac->ack_signal = stats->signal; | |
781 | } | |
782 | ||
459c51ad DD |
783 | spin_unlock_irqrestore(&q->lock, flags); |
784 | return 1; | |
e85d0918 DD |
785 | } |
786 | ||
459c51ad | 787 | int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) |
e85d0918 | 788 | { |
459c51ad DD |
789 | struct zd_mac *mac = zd_hw_mac(hw); |
790 | struct ieee80211_rx_status stats; | |
791 | const struct rx_status *status; | |
792 | struct sk_buff *skb; | |
793 | int bad_frame = 0; | |
85365820 HH |
794 | __le16 fc; |
795 | int need_padding; | |
8318d78a JB |
796 | int i; |
797 | u8 rate; | |
db888aed | 798 | |
459c51ad DD |
799 | if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + |
800 | FCS_LEN + sizeof(struct rx_status)) | |
801 | return -EINVAL; | |
e85d0918 | 802 | |
459c51ad | 803 | memset(&stats, 0, sizeof(stats)); |
e85d0918 | 804 | |
459c51ad DD |
805 | /* Note about pass_failed_fcs and pass_ctrl access below: |
806 | * mac locking intentionally omitted here, as this is the only unlocked | |
807 | * reader and the only writer is configure_filter. Plus, if there were | |
808 | * any races accessing these variables, it wouldn't really matter. | |
809 | * If mac80211 ever provides a way for us to access filter flags | |
810 | * from outside configure_filter, we could improve on this. Also, this | |
811 | * situation may change once we implement some kind of DMA-into-skb | |
812 | * RX path. */ | |
e85d0918 | 813 | |
459c51ad DD |
814 | /* Caller has to ensure that length >= sizeof(struct rx_status). */ |
815 | status = (struct rx_status *) | |
937a049d | 816 | (buffer + (length - sizeof(struct rx_status))); |
e85d0918 | 817 | if (status->frame_status & ZD_RX_ERROR) { |
459c51ad DD |
818 | if (mac->pass_failed_fcs && |
819 | (status->frame_status & ZD_RX_CRC32_ERROR)) { | |
820 | stats.flag |= RX_FLAG_FAILED_FCS_CRC; | |
821 | bad_frame = 1; | |
822 | } else { | |
823 | return -EINVAL; | |
22d3405f | 824 | } |
e85d0918 | 825 | } |
22d3405f | 826 | |
8318d78a JB |
827 | stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; |
828 | stats.band = IEEE80211_BAND_2GHZ; | |
566bfe5a | 829 | stats.signal = status->signal_strength; |
8318d78a JB |
830 | |
831 | rate = zd_rx_rate(buffer, status); | |
832 | ||
833 | /* todo: return index in the big switches in zd_rx_rate instead */ | |
834 | for (i = 0; i < mac->band.n_bitrates; i++) | |
835 | if (rate == mac->band.bitrates[i].hw_value) | |
836 | stats.rate_idx = i; | |
459c51ad DD |
837 | |
838 | length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); | |
839 | buffer += ZD_PLCP_HEADER_SIZE; | |
840 | ||
841 | /* Except for bad frames, filter each frame to see if it is an ACK, in | |
842 | * which case our internal TX tracking is updated. Normally we then | |
843 | * bail here as there's no need to pass ACKs on up to the stack, but | |
844 | * there is also the case where the stack has requested us to pass | |
845 | * control frames on up (pass_ctrl) which we must consider. */ | |
846 | if (!bad_frame && | |
847 | filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) | |
848 | && !mac->pass_ctrl) | |
849 | return 0; | |
e85d0918 | 850 | |
42935eca | 851 | fc = get_unaligned((__le16*)buffer); |
85365820 | 852 | need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); |
9081728b MB |
853 | |
854 | skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); | |
459c51ad DD |
855 | if (skb == NULL) |
856 | return -ENOMEM; | |
9081728b MB |
857 | if (need_padding) { |
858 | /* Make sure the the payload data is 4 byte aligned. */ | |
859 | skb_reserve(skb, 2); | |
860 | } | |
861 | ||
7f4013f0 | 862 | /* FIXME : could we avoid this big memcpy ? */ |
459c51ad DD |
863 | memcpy(skb_put(skb, length), buffer, length); |
864 | ||
f1d58c25 JB |
865 | memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); |
866 | ieee80211_rx_irqsafe(hw, skb); | |
e85d0918 DD |
867 | return 0; |
868 | } | |
869 | ||
459c51ad | 870 | static int zd_op_add_interface(struct ieee80211_hw *hw, |
1ed32e4f | 871 | struct ieee80211_vif *vif) |
e85d0918 | 872 | { |
459c51ad | 873 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 874 | |
05c914fe JB |
875 | /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ |
876 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) | |
459c51ad | 877 | return -EOPNOTSUPP; |
e85d0918 | 878 | |
1ed32e4f | 879 | switch (vif->type) { |
05c914fe JB |
880 | case NL80211_IFTYPE_MONITOR: |
881 | case NL80211_IFTYPE_MESH_POINT: | |
882 | case NL80211_IFTYPE_STATION: | |
883 | case NL80211_IFTYPE_ADHOC: | |
1ed32e4f | 884 | mac->type = vif->type; |
459c51ad DD |
885 | break; |
886 | default: | |
887 | return -EOPNOTSUPP; | |
4d1feabc | 888 | } |
e85d0918 | 889 | |
1ed32e4f | 890 | return zd_write_mac_addr(&mac->chip, vif->addr); |
459c51ad | 891 | } |
e85d0918 | 892 | |
459c51ad | 893 | static void zd_op_remove_interface(struct ieee80211_hw *hw, |
1ed32e4f | 894 | struct ieee80211_vif *vif) |
459c51ad DD |
895 | { |
896 | struct zd_mac *mac = zd_hw_mac(hw); | |
05c914fe | 897 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
86229f0c | 898 | zd_set_beacon_interval(&mac->chip, 0); |
459c51ad DD |
899 | zd_write_mac_addr(&mac->chip, NULL); |
900 | } | |
93137943 | 901 | |
e8975581 | 902 | static int zd_op_config(struct ieee80211_hw *hw, u32 changed) |
459c51ad DD |
903 | { |
904 | struct zd_mac *mac = zd_hw_mac(hw); | |
e8975581 JB |
905 | struct ieee80211_conf *conf = &hw->conf; |
906 | ||
8318d78a | 907 | return zd_chip_set_channel(&mac->chip, conf->channel->hw_value); |
459c51ad | 908 | } |
db888aed | 909 | |
e83a1070 | 910 | static void zd_process_intr(struct work_struct *work) |
72e77a8a LCC |
911 | { |
912 | u16 int_status; | |
913 | struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); | |
914 | ||
d63ddcec | 915 | int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer+4)); |
570a0a7c JB |
916 | if (int_status & INT_CFG_NEXT_BCN) |
917 | dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n"); | |
918 | else | |
72e77a8a LCC |
919 | dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); |
920 | ||
921 | zd_chip_enable_hwint(&mac->chip); | |
922 | } | |
923 | ||
924 | ||
459c51ad | 925 | static void set_multicast_hash_handler(struct work_struct *work) |
4d1feabc | 926 | { |
459c51ad DD |
927 | struct zd_mac *mac = |
928 | container_of(work, struct zd_mac, set_multicast_hash_work); | |
929 | struct zd_mc_hash hash; | |
4d1feabc | 930 | |
459c51ad DD |
931 | spin_lock_irq(&mac->lock); |
932 | hash = mac->multicast_hash; | |
933 | spin_unlock_irq(&mac->lock); | |
4d1feabc | 934 | |
459c51ad | 935 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
e85d0918 DD |
936 | } |
937 | ||
459c51ad | 938 | static void set_rx_filter_handler(struct work_struct *work) |
e85d0918 | 939 | { |
459c51ad DD |
940 | struct zd_mac *mac = |
941 | container_of(work, struct zd_mac, set_rx_filter_work); | |
942 | int r; | |
943 | ||
944 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
945 | r = set_rx_filter(mac); | |
946 | if (r) | |
947 | dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r); | |
e85d0918 DD |
948 | } |
949 | ||
3ac64bee JB |
950 | static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, |
951 | int mc_count, struct dev_addr_list *mclist) | |
952 | { | |
953 | struct zd_mac *mac = zd_hw_mac(hw); | |
954 | struct zd_mc_hash hash; | |
955 | int i; | |
956 | ||
957 | zd_mc_clear(&hash); | |
958 | ||
959 | for (i = 0; i < mc_count; i++) { | |
960 | if (!mclist) | |
961 | break; | |
962 | dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", mclist->dmi_addr); | |
963 | zd_mc_add_addr(&hash, mclist->dmi_addr); | |
964 | mclist = mclist->next; | |
965 | } | |
966 | ||
967 | return hash.low | ((u64)hash.high << 32); | |
968 | } | |
969 | ||
459c51ad DD |
970 | #define SUPPORTED_FIF_FLAGS \ |
971 | (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ | |
2c1a1b12 | 972 | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) |
459c51ad DD |
973 | static void zd_op_configure_filter(struct ieee80211_hw *hw, |
974 | unsigned int changed_flags, | |
975 | unsigned int *new_flags, | |
3ac64bee | 976 | u64 multicast) |
e85d0918 | 977 | { |
3ac64bee JB |
978 | struct zd_mc_hash hash = { |
979 | .low = multicast, | |
980 | .high = multicast >> 32, | |
981 | }; | |
459c51ad DD |
982 | struct zd_mac *mac = zd_hw_mac(hw); |
983 | unsigned long flags; | |
e85d0918 | 984 | |
459c51ad DD |
985 | /* Only deal with supported flags */ |
986 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
987 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
988 | ||
7de3c5dc BP |
989 | /* |
990 | * If multicast parameter (as returned by zd_op_prepare_multicast) | |
991 | * has changed, no bit in changed_flags is set. To handle this | |
992 | * situation, we do not return if changed_flags is 0. If we do so, | |
993 | * we will have some issue with IPv6 which uses multicast for link | |
994 | * layer address resolution. | |
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 | } |