Commit | Line | Data |
---|---|---|
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" }, | |
3d3b33bd JL |
45 | { ZD_REGDOMAIN_JAPAN_2, "JP" }, |
46 | { ZD_REGDOMAIN_JAPAN_3, "JP" }, | |
e83a1070 LR |
47 | { ZD_REGDOMAIN_SPAIN, "ES" }, |
48 | { ZD_REGDOMAIN_FRANCE, "FR" }, | |
49 | }; | |
50 | ||
459c51ad DD |
51 | /* This table contains the hardware specific values for the modulation rates. */ |
52 | static const struct ieee80211_rate zd_rates[] = { | |
8318d78a JB |
53 | { .bitrate = 10, |
54 | .hw_value = ZD_CCK_RATE_1M, }, | |
55 | { .bitrate = 20, | |
56 | .hw_value = ZD_CCK_RATE_2M, | |
57 | .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, | |
58 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
59 | { .bitrate = 55, | |
60 | .hw_value = ZD_CCK_RATE_5_5M, | |
61 | .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, | |
62 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
63 | { .bitrate = 110, | |
64 | .hw_value = ZD_CCK_RATE_11M, | |
65 | .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, | |
66 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
67 | { .bitrate = 60, | |
68 | .hw_value = ZD_OFDM_RATE_6M, | |
69 | .flags = 0 }, | |
70 | { .bitrate = 90, | |
71 | .hw_value = ZD_OFDM_RATE_9M, | |
72 | .flags = 0 }, | |
73 | { .bitrate = 120, | |
74 | .hw_value = ZD_OFDM_RATE_12M, | |
75 | .flags = 0 }, | |
76 | { .bitrate = 180, | |
77 | .hw_value = ZD_OFDM_RATE_18M, | |
78 | .flags = 0 }, | |
79 | { .bitrate = 240, | |
80 | .hw_value = ZD_OFDM_RATE_24M, | |
81 | .flags = 0 }, | |
82 | { .bitrate = 360, | |
83 | .hw_value = ZD_OFDM_RATE_36M, | |
84 | .flags = 0 }, | |
85 | { .bitrate = 480, | |
86 | .hw_value = ZD_OFDM_RATE_48M, | |
87 | .flags = 0 }, | |
88 | { .bitrate = 540, | |
89 | .hw_value = ZD_OFDM_RATE_54M, | |
90 | .flags = 0 }, | |
459c51ad DD |
91 | }; |
92 | ||
7f4013f0 BP |
93 | /* |
94 | * Zydas retry rates table. Each line is listed in the same order as | |
95 | * in zd_rates[] and contains all the rate used when a packet is sent | |
96 | * starting with a given rates. Let's consider an example : | |
97 | * | |
98 | * "11 Mbits : 4, 3, 2, 1, 0" means : | |
99 | * - packet is sent using 4 different rates | |
100 | * - 1st rate is index 3 (ie 11 Mbits) | |
101 | * - 2nd rate is index 2 (ie 5.5 Mbits) | |
102 | * - 3rd rate is index 1 (ie 2 Mbits) | |
103 | * - 4th rate is index 0 (ie 1 Mbits) | |
104 | */ | |
105 | ||
106 | static const struct tx_retry_rate zd_retry_rates[] = { | |
107 | { /* 1 Mbits */ 1, { 0 }}, | |
108 | { /* 2 Mbits */ 2, { 1, 0 }}, | |
109 | { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, | |
110 | { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, | |
111 | { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, | |
112 | { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, | |
113 | { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, | |
114 | { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, | |
115 | { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, | |
116 | { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, | |
117 | { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, | |
118 | { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} | |
119 | }; | |
120 | ||
459c51ad | 121 | static const struct ieee80211_channel zd_channels[] = { |
8318d78a JB |
122 | { .center_freq = 2412, .hw_value = 1 }, |
123 | { .center_freq = 2417, .hw_value = 2 }, | |
124 | { .center_freq = 2422, .hw_value = 3 }, | |
125 | { .center_freq = 2427, .hw_value = 4 }, | |
126 | { .center_freq = 2432, .hw_value = 5 }, | |
127 | { .center_freq = 2437, .hw_value = 6 }, | |
128 | { .center_freq = 2442, .hw_value = 7 }, | |
129 | { .center_freq = 2447, .hw_value = 8 }, | |
130 | { .center_freq = 2452, .hw_value = 9 }, | |
131 | { .center_freq = 2457, .hw_value = 10 }, | |
132 | { .center_freq = 2462, .hw_value = 11 }, | |
133 | { .center_freq = 2467, .hw_value = 12 }, | |
134 | { .center_freq = 2472, .hw_value = 13 }, | |
135 | { .center_freq = 2484, .hw_value = 14 }, | |
459c51ad | 136 | }; |
e85d0918 | 137 | |
583afd1e UK |
138 | static void housekeeping_init(struct zd_mac *mac); |
139 | static void housekeeping_enable(struct zd_mac *mac); | |
140 | static void housekeeping_disable(struct zd_mac *mac); | |
9be23256 JK |
141 | static void beacon_init(struct zd_mac *mac); |
142 | static void beacon_enable(struct zd_mac *mac); | |
143 | static void beacon_disable(struct zd_mac *mac); | |
583afd1e | 144 | |
e83a1070 LR |
145 | static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
146 | { | |
147 | unsigned int i; | |
148 | struct zd_reg_alpha2_map *reg_map; | |
149 | for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { | |
150 | reg_map = ®_alpha2_map[i]; | |
151 | if (regdomain == reg_map->reg) { | |
152 | alpha2[0] = reg_map->alpha2[0]; | |
153 | alpha2[1] = reg_map->alpha2[1]; | |
154 | return 0; | |
155 | } | |
156 | } | |
157 | return 1; | |
158 | } | |
159 | ||
459c51ad | 160 | int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
e85d0918 DD |
161 | { |
162 | int r; | |
e85d0918 | 163 | u8 addr[ETH_ALEN]; |
459c51ad | 164 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed DD |
165 | |
166 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); | |
167 | if (r) | |
168 | return r; | |
169 | ||
459c51ad DD |
170 | SET_IEEE80211_PERM_ADDR(hw, addr); |
171 | ||
74553aed DD |
172 | return 0; |
173 | } | |
174 | ||
459c51ad | 175 | int zd_mac_init_hw(struct ieee80211_hw *hw) |
74553aed DD |
176 | { |
177 | int r; | |
459c51ad | 178 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed | 179 | struct zd_chip *chip = &mac->chip; |
e83a1070 | 180 | char alpha2[2]; |
e85d0918 DD |
181 | u8 default_regdomain; |
182 | ||
183 | r = zd_chip_enable_int(chip); | |
184 | if (r) | |
185 | goto out; | |
74553aed | 186 | r = zd_chip_init_hw(chip); |
e85d0918 DD |
187 | if (r) |
188 | goto disable_int; | |
189 | ||
e85d0918 | 190 | ZD_ASSERT(!irqs_disabled()); |
e85d0918 DD |
191 | |
192 | r = zd_read_regdomain(chip, &default_regdomain); | |
193 | if (r) | |
194 | goto disable_int; | |
e85d0918 DD |
195 | spin_lock_irq(&mac->lock); |
196 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
197 | spin_unlock_irq(&mac->lock); | |
e85d0918 | 198 | |
40da08bc DD |
199 | /* We must inform the device that we are doing encryption/decryption in |
200 | * software at the moment. */ | |
201 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
202 | if (r) |
203 | goto disable_int; | |
204 | ||
e83a1070 | 205 | r = zd_reg2alpha2(mac->regdomain, alpha2); |
fe33eb39 LR |
206 | if (r) |
207 | goto disable_int; | |
e85d0918 | 208 | |
fe33eb39 | 209 | r = regulatory_hint(hw->wiphy, alpha2); |
e85d0918 DD |
210 | disable_int: |
211 | zd_chip_disable_int(chip); | |
212 | out: | |
213 | return r; | |
214 | } | |
215 | ||
216 | void zd_mac_clear(struct zd_mac *mac) | |
217 | { | |
9cdac965 | 218 | flush_workqueue(zd_workqueue); |
e85d0918 | 219 | zd_chip_clear(&mac->chip); |
c48cf125 UK |
220 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
221 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); | |
e85d0918 DD |
222 | } |
223 | ||
c5691235 | 224 | static int set_rx_filter(struct zd_mac *mac) |
e85d0918 | 225 | { |
459c51ad DD |
226 | unsigned long flags; |
227 | u32 filter = STA_RX_FILTER; | |
e85d0918 | 228 | |
459c51ad DD |
229 | spin_lock_irqsave(&mac->lock, flags); |
230 | if (mac->pass_ctrl) | |
231 | filter |= RX_FILTER_CTRL; | |
232 | spin_unlock_irqrestore(&mac->lock, flags); | |
233 | ||
234 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
c5691235 UK |
235 | } |
236 | ||
c2fadcb3 JK |
237 | static int set_mac_and_bssid(struct zd_mac *mac) |
238 | { | |
239 | int r; | |
240 | ||
241 | if (!mac->vif) | |
242 | return -1; | |
243 | ||
244 | r = zd_write_mac_addr(&mac->chip, mac->vif->addr); | |
245 | if (r) | |
246 | return r; | |
247 | ||
248 | /* Vendor driver after setting MAC either sets BSSID for AP or | |
249 | * filter for other modes. | |
250 | */ | |
251 | if (mac->type != NL80211_IFTYPE_AP) | |
252 | return set_rx_filter(mac); | |
253 | else | |
254 | return zd_write_bssid(&mac->chip, mac->vif->addr); | |
255 | } | |
256 | ||
c5691235 UK |
257 | static int set_mc_hash(struct zd_mac *mac) |
258 | { | |
259 | struct zd_mc_hash hash; | |
c5691235 | 260 | zd_mc_clear(&hash); |
c5691235 UK |
261 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
262 | } | |
263 | ||
459c51ad | 264 | static int zd_op_start(struct ieee80211_hw *hw) |
e85d0918 | 265 | { |
459c51ad | 266 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 267 | struct zd_chip *chip = &mac->chip; |
74553aed | 268 | struct zd_usb *usb = &chip->usb; |
e85d0918 DD |
269 | int r; |
270 | ||
74553aed DD |
271 | if (!usb->initialized) { |
272 | r = zd_usb_init_hw(usb); | |
273 | if (r) | |
274 | goto out; | |
275 | } | |
276 | ||
e85d0918 DD |
277 | r = zd_chip_enable_int(chip); |
278 | if (r < 0) | |
279 | goto out; | |
280 | ||
281 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
282 | if (r < 0) | |
283 | goto disable_int; | |
c5691235 | 284 | r = set_rx_filter(mac); |
c5691235 UK |
285 | if (r) |
286 | goto disable_int; | |
287 | r = set_mc_hash(mac); | |
e85d0918 DD |
288 | if (r) |
289 | goto disable_int; | |
290 | r = zd_chip_switch_radio_on(chip); | |
291 | if (r < 0) | |
292 | goto disable_int; | |
459c51ad | 293 | r = zd_chip_enable_rxtx(chip); |
e85d0918 DD |
294 | if (r < 0) |
295 | goto disable_radio; | |
296 | r = zd_chip_enable_hwint(chip); | |
297 | if (r < 0) | |
459c51ad | 298 | goto disable_rxtx; |
e85d0918 | 299 | |
583afd1e | 300 | housekeeping_enable(mac); |
9be23256 JK |
301 | beacon_enable(mac); |
302 | set_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
e85d0918 | 303 | return 0; |
459c51ad DD |
304 | disable_rxtx: |
305 | zd_chip_disable_rxtx(chip); | |
e85d0918 DD |
306 | disable_radio: |
307 | zd_chip_switch_radio_off(chip); | |
308 | disable_int: | |
309 | zd_chip_disable_int(chip); | |
310 | out: | |
311 | return r; | |
312 | } | |
313 | ||
459c51ad DD |
314 | static void zd_op_stop(struct ieee80211_hw *hw) |
315 | { | |
316 | struct zd_mac *mac = zd_hw_mac(hw); | |
317 | struct zd_chip *chip = &mac->chip; | |
318 | struct sk_buff *skb; | |
319 | struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; | |
c9a4b35d | 320 | |
9be23256 JK |
321 | clear_bit(ZD_DEVICE_RUNNING, &mac->flags); |
322 | ||
459c51ad | 323 | /* The order here deliberately is a little different from the open() |
e85d0918 | 324 | * method, since we need to make sure there is no opportunity for RX |
459c51ad | 325 | * frames to be processed by mac80211 after we have stopped it. |
e85d0918 DD |
326 | */ |
327 | ||
459c51ad | 328 | zd_chip_disable_rxtx(chip); |
9be23256 | 329 | beacon_disable(mac); |
583afd1e | 330 | housekeeping_disable(mac); |
b1382ede | 331 | flush_workqueue(zd_workqueue); |
b1382ede | 332 | |
e85d0918 DD |
333 | zd_chip_disable_hwint(chip); |
334 | zd_chip_switch_radio_off(chip); | |
335 | zd_chip_disable_int(chip); | |
336 | ||
e85d0918 | 337 | |
459c51ad | 338 | while ((skb = skb_dequeue(ack_wait_queue))) |
e039fa4a | 339 | dev_kfree_skb_any(skb); |
e85d0918 DD |
340 | } |
341 | ||
459c51ad | 342 | /** |
7f4013f0 | 343 | * zd_mac_tx_status - reports tx status of a packet if required |
459c51ad DD |
344 | * @hw - a &struct ieee80211_hw pointer |
345 | * @skb - a sk-buffer | |
e039fa4a JB |
346 | * @flags: extra flags to set in the TX status info |
347 | * @ackssi: ACK signal strength | |
73ac36ea | 348 | * @success - True for successful transmission of the frame |
459c51ad DD |
349 | * |
350 | * This information calls ieee80211_tx_status_irqsafe() if required by the | |
351 | * control information. It copies the control information into the status | |
352 | * information. | |
353 | * | |
354 | * If no status information has been requested, the skb is freed. | |
355 | */ | |
7f4013f0 BP |
356 | static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
357 | int ackssi, struct tx_status *tx_status) | |
b1382ede | 358 | { |
e039fa4a | 359 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7f4013f0 BP |
360 | int i; |
361 | int success = 1, retry = 1; | |
362 | int first_idx; | |
363 | const struct tx_retry_rate *retries; | |
e039fa4a | 364 | |
e6a9854b | 365 | ieee80211_tx_info_clear_status(info); |
b1382ede | 366 | |
7f4013f0 BP |
367 | if (tx_status) { |
368 | success = !tx_status->failure; | |
369 | retry = tx_status->retry + success; | |
370 | } | |
371 | ||
372 | if (success) { | |
373 | /* success */ | |
e6a9854b | 374 | info->flags |= IEEE80211_TX_STAT_ACK; |
7f4013f0 BP |
375 | } else { |
376 | /* failure */ | |
377 | info->flags &= ~IEEE80211_TX_STAT_ACK; | |
378 | } | |
379 | ||
380 | first_idx = info->status.rates[0].idx; | |
381 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
382 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 383 | ZD_ASSERT(1 <= retry && retry <= retries->count); |
7f4013f0 BP |
384 | |
385 | info->status.rates[0].idx = retries->rate[0]; | |
386 | info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); | |
387 | ||
388 | for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { | |
389 | info->status.rates[i].idx = retries->rate[i]; | |
390 | info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); | |
391 | } | |
392 | for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { | |
86baf712 | 393 | info->status.rates[i].idx = retries->rate[retry - 1]; |
7f4013f0 BP |
394 | info->status.rates[i].count = 1; // (success ? 1:2); |
395 | } | |
396 | if (i<IEEE80211_TX_MAX_RATES) | |
397 | info->status.rates[i].idx = -1; /* terminate */ | |
398 | ||
e039fa4a JB |
399 | info->status.ack_signal = ackssi; |
400 | ieee80211_tx_status_irqsafe(hw, skb); | |
b1382ede DD |
401 | } |
402 | ||
459c51ad DD |
403 | /** |
404 | * zd_mac_tx_failed - callback for failed frames | |
405 | * @dev: the mac80211 wireless device | |
406 | * | |
303863f4 | 407 | * This function is called if a frame couldn't be successfully |
459c51ad DD |
408 | * transferred. The first frame from the tx queue, will be selected and |
409 | * reported as error to the upper layers. | |
410 | */ | |
7f4013f0 | 411 | void zd_mac_tx_failed(struct urb *urb) |
b1382ede | 412 | { |
7f4013f0 BP |
413 | struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); |
414 | struct zd_mac *mac = zd_hw_mac(hw); | |
415 | struct sk_buff_head *q = &mac->ack_wait_queue; | |
459c51ad | 416 | struct sk_buff *skb; |
7f4013f0 BP |
417 | struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; |
418 | unsigned long flags; | |
419 | int success = !tx_status->failure; | |
420 | int retry = tx_status->retry + success; | |
421 | int found = 0; | |
422 | int i, position = 0; | |
b1382ede | 423 | |
7f4013f0 BP |
424 | q = &mac->ack_wait_queue; |
425 | spin_lock_irqsave(&q->lock, flags); | |
426 | ||
427 | skb_queue_walk(q, skb) { | |
428 | struct ieee80211_hdr *tx_hdr; | |
429 | struct ieee80211_tx_info *info; | |
430 | int first_idx, final_idx; | |
431 | const struct tx_retry_rate *retries; | |
432 | u8 final_rate; | |
433 | ||
434 | position ++; | |
435 | ||
436 | /* if the hardware reports a failure and we had a 802.11 ACK | |
437 | * pending, then we skip the first skb when searching for a | |
438 | * matching frame */ | |
439 | if (tx_status->failure && mac->ack_pending && | |
440 | skb_queue_is_first(q, skb)) { | |
441 | continue; | |
442 | } | |
443 | ||
444 | tx_hdr = (struct ieee80211_hdr *)skb->data; | |
445 | ||
446 | /* we skip all frames not matching the reported destination */ | |
447 | if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) { | |
448 | continue; | |
449 | } | |
450 | ||
451 | /* we skip all frames not matching the reported final rate */ | |
5078ed50 | 452 | |
7f4013f0 BP |
453 | info = IEEE80211_SKB_CB(skb); |
454 | first_idx = info->status.rates[0].idx; | |
455 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
456 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 457 | if (retry <= 0 || retry > retries->count) |
7f4013f0 | 458 | continue; |
7f4013f0 | 459 | |
86baf712 | 460 | final_idx = retries->rate[retry - 1]; |
7f4013f0 BP |
461 | final_rate = zd_rates[final_idx].hw_value; |
462 | ||
463 | if (final_rate != tx_status->rate) { | |
464 | continue; | |
465 | } | |
466 | ||
467 | found = 1; | |
468 | break; | |
469 | } | |
470 | ||
471 | if (found) { | |
472 | for (i=1; i<=position; i++) { | |
473 | skb = __skb_dequeue(q); | |
474 | zd_mac_tx_status(hw, skb, | |
475 | mac->ack_pending ? mac->ack_signal : 0, | |
476 | i == position ? tx_status : NULL); | |
477 | mac->ack_pending = 0; | |
478 | } | |
479 | } | |
480 | ||
481 | spin_unlock_irqrestore(&q->lock, flags); | |
b1382ede DD |
482 | } |
483 | ||
459c51ad DD |
484 | /** |
485 | * zd_mac_tx_to_dev - callback for USB layer | |
486 | * @skb: a &sk_buff pointer | |
487 | * @error: error value, 0 if transmission successful | |
488 | * | |
489 | * Informs the MAC layer that the frame has successfully transferred to the | |
490 | * device. If an ACK is required and the transfer to the device has been | |
491 | * successful, the packets are put on the @ack_wait_queue with | |
492 | * the control set removed. | |
493 | */ | |
494 | void zd_mac_tx_to_dev(struct sk_buff *skb, int error) | |
495 | { | |
e039fa4a | 496 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b | 497 | struct ieee80211_hw *hw = info->rate_driver_data[0]; |
7f4013f0 BP |
498 | struct zd_mac *mac = zd_hw_mac(hw); |
499 | ||
500 | ieee80211_tx_info_clear_status(info); | |
b1382ede | 501 | |
e039fa4a JB |
502 | skb_pull(skb, sizeof(struct zd_ctrlset)); |
503 | if (unlikely(error || | |
504 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) { | |
7f4013f0 BP |
505 | /* |
506 | * FIXME : do we need to fill in anything ? | |
507 | */ | |
508 | ieee80211_tx_status_irqsafe(hw, skb); | |
459c51ad | 509 | } else { |
7f4013f0 | 510 | struct sk_buff_head *q = &mac->ack_wait_queue; |
e039fa4a JB |
511 | |
512 | skb_queue_tail(q, skb); | |
7f4013f0 BP |
513 | while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { |
514 | zd_mac_tx_status(hw, skb_dequeue(q), | |
515 | mac->ack_pending ? mac->ack_signal : 0, | |
516 | NULL); | |
517 | mac->ack_pending = 0; | |
518 | } | |
e85d0918 | 519 | } |
e85d0918 DD |
520 | } |
521 | ||
b1cd8416 | 522 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 | 523 | { |
64f222cc | 524 | /* ZD_PURE_RATE() must be used to remove the modulation type flag of |
459c51ad DD |
525 | * the zd-rate values. |
526 | */ | |
e85d0918 | 527 | static const u8 rate_divisor[] = { |
459c51ad DD |
528 | [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, |
529 | [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, | |
530 | /* Bits must be doubled. */ | |
531 | [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, | |
532 | [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, | |
533 | [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, | |
534 | [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, | |
535 | [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, | |
536 | [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, | |
537 | [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, | |
538 | [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, | |
539 | [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, | |
540 | [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, | |
e85d0918 DD |
541 | }; |
542 | ||
543 | u32 bits = (u32)tx_length * 8; | |
544 | u32 divisor; | |
545 | ||
64f222cc | 546 | divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; |
e85d0918 DD |
547 | if (divisor == 0) |
548 | return -EINVAL; | |
549 | ||
b1cd8416 DD |
550 | switch (zd_rate) { |
551 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
552 | bits = (2*bits) + 10; /* round up to the next integer */ |
553 | break; | |
b1cd8416 | 554 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
555 | if (service) { |
556 | u32 t = bits % 11; | |
557 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
558 | if (0 < t && t <= 3) { | |
559 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
560 | } | |
561 | } | |
562 | bits += 10; /* round up to the next integer */ | |
563 | break; | |
564 | } | |
565 | ||
566 | return bits/divisor; | |
567 | } | |
568 | ||
e85d0918 | 569 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
e6a9854b JB |
570 | struct ieee80211_hdr *header, |
571 | struct ieee80211_tx_info *info) | |
e85d0918 | 572 | { |
e85d0918 | 573 | /* |
b1382ede | 574 | * CONTROL TODO: |
e85d0918 DD |
575 | * - if backoff needed, enable bit 0 |
576 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
577 | */ |
578 | ||
579 | cs->control = 0; | |
580 | ||
581 | /* First fragment */ | |
e6a9854b | 582 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
e85d0918 DD |
583 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
584 | ||
13bdcd90 GS |
585 | /* No ACK expected (multicast, etc.) */ |
586 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
587 | cs->control |= ZD_CS_NO_ACK; | |
e85d0918 DD |
588 | |
589 | /* PS-POLL */ | |
85365820 | 590 | if (ieee80211_is_pspoll(header->frame_control)) |
e85d0918 DD |
591 | cs->control |= ZD_CS_PS_POLL_FRAME; |
592 | ||
e6a9854b | 593 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b1382ede DD |
594 | cs->control |= ZD_CS_RTS; |
595 | ||
e6a9854b | 596 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
b1382ede | 597 | cs->control |= ZD_CS_SELF_CTS; |
e85d0918 DD |
598 | |
599 | /* FIXME: Management frame? */ | |
600 | } | |
601 | ||
f2cae6c5 | 602 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon) |
72e77a8a LCC |
603 | { |
604 | struct zd_mac *mac = zd_hw_mac(hw); | |
51272292 | 605 | int r, ret, num_cmds, req_pos = 0; |
72e77a8a LCC |
606 | u32 tmp, j = 0; |
607 | /* 4 more bytes for tail CRC */ | |
608 | u32 full_len = beacon->len + 4; | |
9be23256 | 609 | unsigned long end_jiffies, message_jiffies; |
51272292 JK |
610 | struct zd_ioreq32 *ioreqs; |
611 | ||
612 | /* Alloc memory for full beacon write at once. */ | |
613 | num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len; | |
614 | ioreqs = kmalloc(num_cmds * sizeof(struct zd_ioreq32), GFP_KERNEL); | |
615 | if (!ioreqs) | |
616 | return -ENOMEM; | |
9be23256 JK |
617 | |
618 | mutex_lock(&mac->chip.mutex); | |
f2cae6c5 | 619 | |
9be23256 | 620 | r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 621 | if (r < 0) |
9be23256 JK |
622 | goto out; |
623 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); | |
f2cae6c5 | 624 | if (r < 0) |
9be23256 | 625 | goto release_sema; |
f2cae6c5 | 626 | |
9be23256 JK |
627 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ |
628 | message_jiffies = jiffies + HZ / 10; /*~100ms*/ | |
72e77a8a | 629 | while (tmp & 0x2) { |
9be23256 | 630 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 631 | if (r < 0) |
9be23256 JK |
632 | goto release_sema; |
633 | if (time_is_before_eq_jiffies(message_jiffies)) { | |
634 | message_jiffies = jiffies + HZ / 10; | |
635 | dev_err(zd_mac_dev(mac), | |
636 | "CR_BCN_FIFO_SEMAPHORE not ready\n"); | |
637 | if (time_is_before_eq_jiffies(end_jiffies)) { | |
638 | dev_err(zd_mac_dev(mac), | |
639 | "Giving up beacon config.\n"); | |
640 | r = -ETIMEDOUT; | |
641 | goto release_sema; | |
72e77a8a LCC |
642 | } |
643 | } | |
9be23256 | 644 | msleep(20); |
72e77a8a LCC |
645 | } |
646 | ||
51272292 JK |
647 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
648 | ioreqs[req_pos].value = full_len - 1; | |
649 | req_pos++; | |
f2cae6c5 | 650 | if (zd_chip_is_zd1211b(&mac->chip)) { |
51272292 JK |
651 | ioreqs[req_pos].addr = CR_BCN_LENGTH; |
652 | ioreqs[req_pos].value = full_len - 1; | |
653 | req_pos++; | |
f2cae6c5 | 654 | } |
72e77a8a | 655 | |
f2cae6c5 | 656 | for (j = 0 ; j < beacon->len; j++) { |
51272292 JK |
657 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
658 | ioreqs[req_pos].value = *((u8 *)(beacon->data + j)); | |
659 | req_pos++; | |
f2cae6c5 | 660 | } |
72e77a8a | 661 | |
f2cae6c5 | 662 | for (j = 0; j < 4; j++) { |
51272292 JK |
663 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
664 | ioreqs[req_pos].value = 0x0; | |
665 | req_pos++; | |
f2cae6c5 DD |
666 | } |
667 | ||
51272292 JK |
668 | BUG_ON(req_pos != num_cmds); |
669 | ||
670 | r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds); | |
671 | ||
9be23256 JK |
672 | release_sema: |
673 | /* | |
674 | * Try very hard to release device beacon semaphore, as otherwise | |
675 | * device/driver can be left in unusable state. | |
676 | */ | |
677 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ | |
678 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
679 | while (ret < 0) { | |
680 | if (time_is_before_eq_jiffies(end_jiffies)) { | |
681 | ret = -ETIMEDOUT; | |
682 | break; | |
683 | } | |
684 | ||
685 | msleep(20); | |
686 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
687 | } | |
688 | ||
689 | if (ret < 0) | |
690 | dev_err(zd_mac_dev(mac), "Could not release " | |
691 | "CR_BCN_FIFO_SEMAPHORE!\n"); | |
692 | if (r < 0 || ret < 0) { | |
693 | if (r >= 0) | |
694 | r = ret; | |
695 | goto out; | |
696 | } | |
72e77a8a | 697 | |
72e77a8a LCC |
698 | /* 802.11b/g 2.4G CCK 1Mb |
699 | * 802.11a, not yet implemented, uses different values (see GPL vendor | |
700 | * driver) | |
701 | */ | |
9be23256 JK |
702 | r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19), |
703 | CR_BCN_PLCP_CFG); | |
704 | out: | |
705 | mutex_unlock(&mac->chip.mutex); | |
51272292 | 706 | kfree(ioreqs); |
9be23256 | 707 | return r; |
72e77a8a LCC |
708 | } |
709 | ||
e85d0918 | 710 | static int fill_ctrlset(struct zd_mac *mac, |
e039fa4a | 711 | struct sk_buff *skb) |
e85d0918 DD |
712 | { |
713 | int r; | |
459c51ad DD |
714 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
715 | unsigned int frag_len = skb->len + FCS_LEN; | |
e85d0918 | 716 | unsigned int packet_length; |
2e92e6f2 | 717 | struct ieee80211_rate *txrate; |
e85d0918 DD |
718 | struct zd_ctrlset *cs = (struct zd_ctrlset *) |
719 | skb_push(skb, sizeof(struct zd_ctrlset)); | |
e039fa4a | 720 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 | 721 | |
e85d0918 | 722 | ZD_ASSERT(frag_len <= 0xffff); |
e85d0918 | 723 | |
e039fa4a | 724 | txrate = ieee80211_get_tx_rate(mac->hw, info); |
2e92e6f2 JB |
725 | |
726 | cs->modulation = txrate->hw_value; | |
e6a9854b | 727 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
2e92e6f2 | 728 | cs->modulation = txrate->hw_value_short; |
e85d0918 DD |
729 | |
730 | cs->tx_length = cpu_to_le16(frag_len); | |
731 | ||
e6a9854b | 732 | cs_set_control(mac, cs, hdr, info); |
e85d0918 DD |
733 | |
734 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
735 | ZD_ASSERT(packet_length <= 0xffff); | |
736 | /* ZD1211B: Computing the length difference this way, gives us | |
737 | * flexibility to compute the packet length. | |
738 | */ | |
74553aed | 739 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
e85d0918 DD |
740 | packet_length - frag_len : packet_length); |
741 | ||
742 | /* | |
743 | * CURRENT LENGTH: | |
744 | * - transmit frame length in microseconds | |
745 | * - seems to be derived from frame length | |
746 | * - see Cal_Us_Service() in zdinlinef.h | |
747 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
748 | * - bTxBurstEnable is never set in the vendor driver | |
749 | * | |
750 | * SERVICE: | |
751 | * - "for PLCP configuration" | |
752 | * - always 0 except in some situations at 802.11b 11M | |
753 | * - see line 53 of zdinlinef.h | |
754 | */ | |
755 | cs->service = 0; | |
64f222cc | 756 | r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), |
e85d0918 DD |
757 | le16_to_cpu(cs->tx_length)); |
758 | if (r < 0) | |
759 | return r; | |
760 | cs->current_length = cpu_to_le16(r); | |
459c51ad | 761 | cs->next_frame_length = 0; |
e85d0918 DD |
762 | |
763 | return 0; | |
764 | } | |
765 | ||
459c51ad DD |
766 | /** |
767 | * zd_op_tx - transmits a network frame to the device | |
768 | * | |
769 | * @dev: mac80211 hardware device | |
770 | * @skb: socket buffer | |
771 | * @control: the control structure | |
772 | * | |
773 | * This function transmit an IEEE 802.11 network frame to the device. The | |
774 | * control block of the skbuff will be initialized. If necessary the incoming | |
775 | * mac80211 queues will be stopped. | |
776 | */ | |
e039fa4a | 777 | static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb) |
e85d0918 | 778 | { |
459c51ad | 779 | struct zd_mac *mac = zd_hw_mac(hw); |
e039fa4a | 780 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
459c51ad | 781 | int r; |
e85d0918 | 782 | |
e039fa4a | 783 | r = fill_ctrlset(mac, skb); |
459c51ad | 784 | if (r) |
640c65ea | 785 | goto fail; |
e85d0918 | 786 | |
e6a9854b | 787 | info->rate_driver_data[0] = hw; |
e039fa4a | 788 | |
459c51ad | 789 | r = zd_usb_tx(&mac->chip.usb, skb); |
e039fa4a | 790 | if (r) |
640c65ea JM |
791 | goto fail; |
792 | return 0; | |
793 | ||
794 | fail: | |
795 | dev_kfree_skb(skb); | |
e85d0918 DD |
796 | return 0; |
797 | } | |
798 | ||
459c51ad DD |
799 | /** |
800 | * filter_ack - filters incoming packets for acknowledgements | |
801 | * @dev: the mac80211 device | |
802 | * @rx_hdr: received header | |
803 | * @stats: the status for the received packet | |
741fec53 | 804 | * |
459c51ad DD |
805 | * This functions looks for ACK packets and tries to match them with the |
806 | * frames in the tx queue. If a match is found the frame will be dequeued and | |
807 | * the upper layers is informed about the successful transmission. If | |
808 | * mac80211 queues have been stopped and the number of frames still to be | |
809 | * transmitted is low the queues will be opened again. | |
e85d0918 | 810 | * |
459c51ad | 811 | * Returns 1 if the frame was an ACK, 0 if it was ignored. |
e85d0918 | 812 | */ |
459c51ad DD |
813 | static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, |
814 | struct ieee80211_rx_status *stats) | |
e85d0918 | 815 | { |
7f4013f0 | 816 | struct zd_mac *mac = zd_hw_mac(hw); |
459c51ad DD |
817 | struct sk_buff *skb; |
818 | struct sk_buff_head *q; | |
819 | unsigned long flags; | |
7f4013f0 BP |
820 | int found = 0; |
821 | int i, position = 0; | |
e85d0918 | 822 | |
85365820 | 823 | if (!ieee80211_is_ack(rx_hdr->frame_control)) |
e85d0918 | 824 | return 0; |
e85d0918 | 825 | |
7f4013f0 | 826 | q = &mac->ack_wait_queue; |
459c51ad | 827 | spin_lock_irqsave(&q->lock, flags); |
47a227db | 828 | skb_queue_walk(q, skb) { |
459c51ad DD |
829 | struct ieee80211_hdr *tx_hdr; |
830 | ||
7f4013f0 BP |
831 | position ++; |
832 | ||
833 | if (mac->ack_pending && skb_queue_is_first(q, skb)) | |
834 | continue; | |
835 | ||
459c51ad | 836 | tx_hdr = (struct ieee80211_hdr *)skb->data; |
cde6901b | 837 | if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) |
459c51ad | 838 | { |
7f4013f0 BP |
839 | found = 1; |
840 | break; | |
459c51ad DD |
841 | } |
842 | } | |
7f4013f0 BP |
843 | |
844 | if (found) { | |
845 | for (i=1; i<position; i++) { | |
846 | skb = __skb_dequeue(q); | |
847 | zd_mac_tx_status(hw, skb, | |
848 | mac->ack_pending ? mac->ack_signal : 0, | |
849 | NULL); | |
850 | mac->ack_pending = 0; | |
851 | } | |
852 | ||
853 | mac->ack_pending = 1; | |
854 | mac->ack_signal = stats->signal; | |
f773e409 JK |
855 | |
856 | /* Prevent pending tx-packet on AP-mode */ | |
857 | if (mac->type == NL80211_IFTYPE_AP) { | |
858 | skb = __skb_dequeue(q); | |
859 | zd_mac_tx_status(hw, skb, mac->ack_signal, NULL); | |
860 | mac->ack_pending = 0; | |
861 | } | |
7f4013f0 BP |
862 | } |
863 | ||
459c51ad DD |
864 | spin_unlock_irqrestore(&q->lock, flags); |
865 | return 1; | |
e85d0918 DD |
866 | } |
867 | ||
459c51ad | 868 | int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) |
e85d0918 | 869 | { |
459c51ad DD |
870 | struct zd_mac *mac = zd_hw_mac(hw); |
871 | struct ieee80211_rx_status stats; | |
872 | const struct rx_status *status; | |
873 | struct sk_buff *skb; | |
874 | int bad_frame = 0; | |
85365820 HH |
875 | __le16 fc; |
876 | int need_padding; | |
8318d78a JB |
877 | int i; |
878 | u8 rate; | |
db888aed | 879 | |
459c51ad DD |
880 | if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + |
881 | FCS_LEN + sizeof(struct rx_status)) | |
882 | return -EINVAL; | |
e85d0918 | 883 | |
459c51ad | 884 | memset(&stats, 0, sizeof(stats)); |
e85d0918 | 885 | |
459c51ad DD |
886 | /* Note about pass_failed_fcs and pass_ctrl access below: |
887 | * mac locking intentionally omitted here, as this is the only unlocked | |
888 | * reader and the only writer is configure_filter. Plus, if there were | |
889 | * any races accessing these variables, it wouldn't really matter. | |
890 | * If mac80211 ever provides a way for us to access filter flags | |
891 | * from outside configure_filter, we could improve on this. Also, this | |
892 | * situation may change once we implement some kind of DMA-into-skb | |
893 | * RX path. */ | |
e85d0918 | 894 | |
459c51ad DD |
895 | /* Caller has to ensure that length >= sizeof(struct rx_status). */ |
896 | status = (struct rx_status *) | |
937a049d | 897 | (buffer + (length - sizeof(struct rx_status))); |
e85d0918 | 898 | if (status->frame_status & ZD_RX_ERROR) { |
459c51ad DD |
899 | if (mac->pass_failed_fcs && |
900 | (status->frame_status & ZD_RX_CRC32_ERROR)) { | |
901 | stats.flag |= RX_FLAG_FAILED_FCS_CRC; | |
902 | bad_frame = 1; | |
903 | } else { | |
904 | return -EINVAL; | |
22d3405f | 905 | } |
e85d0918 | 906 | } |
22d3405f | 907 | |
8318d78a JB |
908 | stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; |
909 | stats.band = IEEE80211_BAND_2GHZ; | |
566bfe5a | 910 | stats.signal = status->signal_strength; |
8318d78a JB |
911 | |
912 | rate = zd_rx_rate(buffer, status); | |
913 | ||
914 | /* todo: return index in the big switches in zd_rx_rate instead */ | |
915 | for (i = 0; i < mac->band.n_bitrates; i++) | |
916 | if (rate == mac->band.bitrates[i].hw_value) | |
917 | stats.rate_idx = i; | |
459c51ad DD |
918 | |
919 | length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); | |
920 | buffer += ZD_PLCP_HEADER_SIZE; | |
921 | ||
922 | /* Except for bad frames, filter each frame to see if it is an ACK, in | |
923 | * which case our internal TX tracking is updated. Normally we then | |
924 | * bail here as there's no need to pass ACKs on up to the stack, but | |
925 | * there is also the case where the stack has requested us to pass | |
926 | * control frames on up (pass_ctrl) which we must consider. */ | |
927 | if (!bad_frame && | |
928 | filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) | |
929 | && !mac->pass_ctrl) | |
930 | return 0; | |
e85d0918 | 931 | |
42935eca | 932 | fc = get_unaligned((__le16*)buffer); |
85365820 | 933 | need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); |
9081728b MB |
934 | |
935 | skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); | |
459c51ad DD |
936 | if (skb == NULL) |
937 | return -ENOMEM; | |
9081728b | 938 | if (need_padding) { |
77c2061d | 939 | /* Make sure the payload data is 4 byte aligned. */ |
9081728b MB |
940 | skb_reserve(skb, 2); |
941 | } | |
942 | ||
7f4013f0 | 943 | /* FIXME : could we avoid this big memcpy ? */ |
459c51ad DD |
944 | memcpy(skb_put(skb, length), buffer, length); |
945 | ||
f1d58c25 JB |
946 | memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); |
947 | ieee80211_rx_irqsafe(hw, skb); | |
e85d0918 DD |
948 | return 0; |
949 | } | |
950 | ||
459c51ad | 951 | static int zd_op_add_interface(struct ieee80211_hw *hw, |
1ed32e4f | 952 | struct ieee80211_vif *vif) |
e85d0918 | 953 | { |
459c51ad | 954 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 955 | |
05c914fe JB |
956 | /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ |
957 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) | |
459c51ad | 958 | return -EOPNOTSUPP; |
e85d0918 | 959 | |
1ed32e4f | 960 | switch (vif->type) { |
05c914fe JB |
961 | case NL80211_IFTYPE_MONITOR: |
962 | case NL80211_IFTYPE_MESH_POINT: | |
963 | case NL80211_IFTYPE_STATION: | |
964 | case NL80211_IFTYPE_ADHOC: | |
1ed32e4f | 965 | mac->type = vif->type; |
459c51ad DD |
966 | break; |
967 | default: | |
968 | return -EOPNOTSUPP; | |
4d1feabc | 969 | } |
e85d0918 | 970 | |
c2fadcb3 JK |
971 | mac->vif = vif; |
972 | ||
973 | return set_mac_and_bssid(mac); | |
459c51ad | 974 | } |
e85d0918 | 975 | |
459c51ad | 976 | static void zd_op_remove_interface(struct ieee80211_hw *hw, |
1ed32e4f | 977 | struct ieee80211_vif *vif) |
459c51ad DD |
978 | { |
979 | struct zd_mac *mac = zd_hw_mac(hw); | |
05c914fe | 980 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
c2fadcb3 | 981 | mac->vif = NULL; |
b91a515d | 982 | zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED); |
459c51ad DD |
983 | zd_write_mac_addr(&mac->chip, NULL); |
984 | } | |
93137943 | 985 | |
e8975581 | 986 | static int zd_op_config(struct ieee80211_hw *hw, u32 changed) |
459c51ad DD |
987 | { |
988 | struct zd_mac *mac = zd_hw_mac(hw); | |
e8975581 JB |
989 | struct ieee80211_conf *conf = &hw->conf; |
990 | ||
8318d78a | 991 | return zd_chip_set_channel(&mac->chip, conf->channel->hw_value); |
459c51ad | 992 | } |
db888aed | 993 | |
4099e2f4 JK |
994 | static void zd_beacon_done(struct zd_mac *mac) |
995 | { | |
996 | struct sk_buff *skb, *beacon; | |
997 | ||
9be23256 JK |
998 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) |
999 | return; | |
4099e2f4 JK |
1000 | if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP) |
1001 | return; | |
1002 | ||
1003 | /* | |
1004 | * Send out buffered broad- and multicast frames. | |
1005 | */ | |
1006 | while (!ieee80211_queue_stopped(mac->hw, 0)) { | |
1007 | skb = ieee80211_get_buffered_bc(mac->hw, mac->vif); | |
1008 | if (!skb) | |
1009 | break; | |
1010 | zd_op_tx(mac->hw, skb); | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Fetch next beacon so that tim_count is updated. | |
1015 | */ | |
1016 | beacon = ieee80211_beacon_get(mac->hw, mac->vif); | |
9be23256 JK |
1017 | if (beacon) { |
1018 | zd_mac_config_beacon(mac->hw, beacon); | |
1019 | kfree_skb(beacon); | |
1020 | } | |
4099e2f4 | 1021 | |
9be23256 JK |
1022 | spin_lock_irq(&mac->lock); |
1023 | mac->beacon.last_update = jiffies; | |
1024 | spin_unlock_irq(&mac->lock); | |
4099e2f4 JK |
1025 | } |
1026 | ||
e83a1070 | 1027 | static void zd_process_intr(struct work_struct *work) |
72e77a8a LCC |
1028 | { |
1029 | u16 int_status; | |
8b17f75c | 1030 | unsigned long flags; |
72e77a8a LCC |
1031 | struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); |
1032 | ||
8b17f75c JK |
1033 | spin_lock_irqsave(&mac->lock, flags); |
1034 | int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4)); | |
1035 | spin_unlock_irqrestore(&mac->lock, flags); | |
1036 | ||
4099e2f4 JK |
1037 | if (int_status & INT_CFG_NEXT_BCN) { |
1038 | /*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/ | |
1039 | zd_beacon_done(mac); | |
1040 | } else { | |
72e77a8a | 1041 | dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); |
4099e2f4 | 1042 | } |
72e77a8a LCC |
1043 | |
1044 | zd_chip_enable_hwint(&mac->chip); | |
1045 | } | |
1046 | ||
1047 | ||
3ac64bee | 1048 | static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, |
22bedad3 | 1049 | struct netdev_hw_addr_list *mc_list) |
3ac64bee JB |
1050 | { |
1051 | struct zd_mac *mac = zd_hw_mac(hw); | |
1052 | struct zd_mc_hash hash; | |
22bedad3 | 1053 | struct netdev_hw_addr *ha; |
3ac64bee JB |
1054 | |
1055 | zd_mc_clear(&hash); | |
1056 | ||
22bedad3 JP |
1057 | netdev_hw_addr_list_for_each(ha, mc_list) { |
1058 | dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", ha->addr); | |
1059 | zd_mc_add_addr(&hash, ha->addr); | |
3ac64bee JB |
1060 | } |
1061 | ||
1062 | return hash.low | ((u64)hash.high << 32); | |
1063 | } | |
1064 | ||
459c51ad DD |
1065 | #define SUPPORTED_FIF_FLAGS \ |
1066 | (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ | |
2c1a1b12 | 1067 | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) |
459c51ad DD |
1068 | static void zd_op_configure_filter(struct ieee80211_hw *hw, |
1069 | unsigned int changed_flags, | |
1070 | unsigned int *new_flags, | |
3ac64bee | 1071 | u64 multicast) |
e85d0918 | 1072 | { |
3ac64bee JB |
1073 | struct zd_mc_hash hash = { |
1074 | .low = multicast, | |
1075 | .high = multicast >> 32, | |
1076 | }; | |
459c51ad DD |
1077 | struct zd_mac *mac = zd_hw_mac(hw); |
1078 | unsigned long flags; | |
a6fb071b | 1079 | int r; |
e85d0918 | 1080 | |
459c51ad DD |
1081 | /* Only deal with supported flags */ |
1082 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
1083 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
1084 | ||
7de3c5dc BP |
1085 | /* |
1086 | * If multicast parameter (as returned by zd_op_prepare_multicast) | |
1087 | * has changed, no bit in changed_flags is set. To handle this | |
1088 | * situation, we do not return if changed_flags is 0. If we do so, | |
1089 | * we will have some issue with IPv6 which uses multicast for link | |
1090 | * layer address resolution. | |
1091 | */ | |
3ac64bee | 1092 | if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) |
459c51ad | 1093 | zd_mc_add_all(&hash); |
459c51ad DD |
1094 | |
1095 | spin_lock_irqsave(&mac->lock, flags); | |
1096 | mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); | |
1097 | mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); | |
1098 | mac->multicast_hash = hash; | |
1099 | spin_unlock_irqrestore(&mac->lock, flags); | |
3ac64bee | 1100 | |
a6fb071b | 1101 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
459c51ad | 1102 | |
a6fb071b JK |
1103 | if (changed_flags & FIF_CONTROL) { |
1104 | r = set_rx_filter(mac); | |
1105 | if (r) | |
1106 | dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r); | |
1107 | } | |
459c51ad DD |
1108 | |
1109 | /* no handling required for FIF_OTHER_BSS as we don't currently | |
1110 | * do BSSID filtering */ | |
1111 | /* FIXME: in future it would be nice to enable the probe response | |
1112 | * filter (so that the driver doesn't see them) until | |
1113 | * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd | |
1114 | * have to schedule work to enable prbresp reception, which might | |
1115 | * happen too late. For now we'll just listen and forward them all the | |
1116 | * time. */ | |
e85d0918 DD |
1117 | } |
1118 | ||
5cf6cf81 | 1119 | static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble) |
e85d0918 | 1120 | { |
459c51ad | 1121 | mutex_lock(&mac->chip.mutex); |
459c51ad DD |
1122 | zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); |
1123 | mutex_unlock(&mac->chip.mutex); | |
e85d0918 DD |
1124 | } |
1125 | ||
471b3efd JB |
1126 | static void zd_op_bss_info_changed(struct ieee80211_hw *hw, |
1127 | struct ieee80211_vif *vif, | |
1128 | struct ieee80211_bss_conf *bss_conf, | |
1129 | u32 changes) | |
e85d0918 | 1130 | { |
459c51ad | 1131 | struct zd_mac *mac = zd_hw_mac(hw); |
2d0ddec5 | 1132 | int associated; |
459c51ad DD |
1133 | |
1134 | dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); | |
1135 | ||
2d0ddec5 JB |
1136 | if (mac->type == NL80211_IFTYPE_MESH_POINT || |
1137 | mac->type == NL80211_IFTYPE_ADHOC) { | |
1138 | associated = true; | |
1139 | if (changes & BSS_CHANGED_BEACON) { | |
1140 | struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); | |
1141 | ||
1142 | if (beacon) { | |
9be23256 | 1143 | zd_chip_disable_hwint(&mac->chip); |
2d0ddec5 | 1144 | zd_mac_config_beacon(hw, beacon); |
9be23256 | 1145 | zd_chip_enable_hwint(&mac->chip); |
2d0ddec5 JB |
1146 | kfree_skb(beacon); |
1147 | } | |
1148 | } | |
1149 | ||
1150 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
b91a515d JK |
1151 | u16 interval = 0; |
1152 | u8 period = 0; | |
2d0ddec5 | 1153 | |
b91a515d JK |
1154 | if (bss_conf->enable_beacon) { |
1155 | period = bss_conf->dtim_period; | |
1156 | interval = bss_conf->beacon_int; | |
1157 | } | |
2d0ddec5 | 1158 | |
9be23256 JK |
1159 | spin_lock_irq(&mac->lock); |
1160 | mac->beacon.period = period; | |
1161 | mac->beacon.interval = interval; | |
1162 | mac->beacon.last_update = jiffies; | |
1163 | spin_unlock_irq(&mac->lock); | |
1164 | ||
b91a515d JK |
1165 | zd_set_beacon_interval(&mac->chip, interval, period, |
1166 | mac->type); | |
2d0ddec5 JB |
1167 | } |
1168 | } else | |
1169 | associated = is_valid_ether_addr(bss_conf->bssid); | |
1170 | ||
1171 | spin_lock_irq(&mac->lock); | |
1172 | mac->associated = associated; | |
1173 | spin_unlock_irq(&mac->lock); | |
1174 | ||
1175 | /* TODO: do hardware bssid filtering */ | |
1176 | ||
471b3efd | 1177 | if (changes & BSS_CHANGED_ERP_PREAMBLE) { |
5cf6cf81 | 1178 | spin_lock_irq(&mac->lock); |
471b3efd | 1179 | mac->short_preamble = bss_conf->use_short_preamble; |
5cf6cf81 JK |
1180 | spin_unlock_irq(&mac->lock); |
1181 | ||
1182 | set_rts_cts(mac, bss_conf->use_short_preamble); | |
459c51ad | 1183 | } |
e85d0918 DD |
1184 | } |
1185 | ||
5fe73197 AF |
1186 | static u64 zd_op_get_tsf(struct ieee80211_hw *hw) |
1187 | { | |
1188 | struct zd_mac *mac = zd_hw_mac(hw); | |
1189 | return zd_chip_get_tsf(&mac->chip); | |
1190 | } | |
1191 | ||
459c51ad DD |
1192 | static const struct ieee80211_ops zd_ops = { |
1193 | .tx = zd_op_tx, | |
1194 | .start = zd_op_start, | |
1195 | .stop = zd_op_stop, | |
1196 | .add_interface = zd_op_add_interface, | |
1197 | .remove_interface = zd_op_remove_interface, | |
1198 | .config = zd_op_config, | |
3ac64bee | 1199 | .prepare_multicast = zd_op_prepare_multicast, |
459c51ad | 1200 | .configure_filter = zd_op_configure_filter, |
471b3efd | 1201 | .bss_info_changed = zd_op_bss_info_changed, |
5fe73197 | 1202 | .get_tsf = zd_op_get_tsf, |
459c51ad DD |
1203 | }; |
1204 | ||
1205 | struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) | |
e85d0918 | 1206 | { |
459c51ad DD |
1207 | struct zd_mac *mac; |
1208 | struct ieee80211_hw *hw; | |
e85d0918 | 1209 | |
459c51ad DD |
1210 | hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); |
1211 | if (!hw) { | |
1212 | dev_dbg_f(&intf->dev, "out of memory\n"); | |
1213 | return NULL; | |
db888aed | 1214 | } |
459c51ad DD |
1215 | |
1216 | mac = zd_hw_mac(hw); | |
1217 | ||
1218 | memset(mac, 0, sizeof(*mac)); | |
1219 | spin_lock_init(&mac->lock); | |
1220 | mac->hw = hw; | |
1221 | ||
05c914fe | 1222 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
459c51ad DD |
1223 | |
1224 | memcpy(mac->channels, zd_channels, sizeof(zd_channels)); | |
1225 | memcpy(mac->rates, zd_rates, sizeof(zd_rates)); | |
8318d78a JB |
1226 | mac->band.n_bitrates = ARRAY_SIZE(zd_rates); |
1227 | mac->band.bitrates = mac->rates; | |
1228 | mac->band.n_channels = ARRAY_SIZE(zd_channels); | |
1229 | mac->band.channels = mac->channels; | |
1230 | ||
1231 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band; | |
1232 | ||
72e77a8a | 1233 | hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | |
4099e2f4 JK |
1234 | IEEE80211_HW_SIGNAL_UNSPEC | |
1235 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING; | |
459c51ad | 1236 | |
f59ac048 LR |
1237 | hw->wiphy->interface_modes = |
1238 | BIT(NL80211_IFTYPE_MESH_POINT) | | |
1239 | BIT(NL80211_IFTYPE_STATION) | | |
1240 | BIT(NL80211_IFTYPE_ADHOC); | |
1241 | ||
566bfe5a | 1242 | hw->max_signal = 100; |
459c51ad DD |
1243 | hw->queues = 1; |
1244 | hw->extra_tx_headroom = sizeof(struct zd_ctrlset); | |
1245 | ||
7f4013f0 BP |
1246 | /* |
1247 | * Tell mac80211 that we support multi rate retries | |
1248 | */ | |
1249 | hw->max_rates = IEEE80211_TX_MAX_RATES; | |
1250 | hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ | |
1251 | ||
459c51ad | 1252 | skb_queue_head_init(&mac->ack_wait_queue); |
7f4013f0 | 1253 | mac->ack_pending = 0; |
459c51ad | 1254 | |
459c51ad DD |
1255 | zd_chip_init(&mac->chip, hw, intf); |
1256 | housekeeping_init(mac); | |
9be23256 | 1257 | beacon_init(mac); |
72e77a8a | 1258 | INIT_WORK(&mac->process_intr, zd_process_intr); |
459c51ad DD |
1259 | |
1260 | SET_IEEE80211_DEV(hw, &intf->dev); | |
1261 | return hw; | |
e85d0918 DD |
1262 | } |
1263 | ||
9be23256 JK |
1264 | #define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ) |
1265 | ||
1266 | static void beacon_watchdog_handler(struct work_struct *work) | |
1267 | { | |
1268 | struct zd_mac *mac = | |
1269 | container_of(work, struct zd_mac, beacon.watchdog_work.work); | |
1270 | struct sk_buff *beacon; | |
1271 | unsigned long timeout; | |
1272 | int interval, period; | |
1273 | ||
1274 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) | |
1275 | goto rearm; | |
1276 | if (mac->type != NL80211_IFTYPE_AP || !mac->vif) | |
1277 | goto rearm; | |
1278 | ||
1279 | spin_lock_irq(&mac->lock); | |
1280 | interval = mac->beacon.interval; | |
1281 | period = mac->beacon.period; | |
1282 | timeout = mac->beacon.last_update + msecs_to_jiffies(interval) + HZ; | |
1283 | spin_unlock_irq(&mac->lock); | |
1284 | ||
1285 | if (interval > 0 && time_is_before_jiffies(timeout)) { | |
1286 | dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, " | |
1287 | "restarting. " | |
1288 | "(interval: %d, dtim: %d)\n", | |
1289 | interval, period); | |
1290 | ||
1291 | zd_chip_disable_hwint(&mac->chip); | |
1292 | ||
1293 | beacon = ieee80211_beacon_get(mac->hw, mac->vif); | |
1294 | if (beacon) { | |
1295 | zd_mac_config_beacon(mac->hw, beacon); | |
1296 | kfree_skb(beacon); | |
1297 | } | |
1298 | ||
1299 | zd_set_beacon_interval(&mac->chip, interval, period, mac->type); | |
1300 | ||
1301 | zd_chip_enable_hwint(&mac->chip); | |
1302 | ||
1303 | spin_lock_irq(&mac->lock); | |
1304 | mac->beacon.last_update = jiffies; | |
1305 | spin_unlock_irq(&mac->lock); | |
1306 | } | |
1307 | ||
1308 | rearm: | |
1309 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1310 | BEACON_WATCHDOG_DELAY); | |
1311 | } | |
1312 | ||
1313 | static void beacon_init(struct zd_mac *mac) | |
1314 | { | |
1315 | INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler); | |
1316 | } | |
1317 | ||
1318 | static void beacon_enable(struct zd_mac *mac) | |
1319 | { | |
1320 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1321 | ||
1322 | mac->beacon.last_update = jiffies; | |
1323 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1324 | BEACON_WATCHDOG_DELAY); | |
1325 | } | |
1326 | ||
1327 | static void beacon_disable(struct zd_mac *mac) | |
1328 | { | |
1329 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1330 | cancel_delayed_work_sync(&mac->beacon.watchdog_work); | |
1331 | } | |
1332 | ||
583afd1e UK |
1333 | #define LINK_LED_WORK_DELAY HZ |
1334 | ||
c4028958 | 1335 | static void link_led_handler(struct work_struct *work) |
583afd1e | 1336 | { |
c4028958 DH |
1337 | struct zd_mac *mac = |
1338 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); | |
583afd1e | 1339 | struct zd_chip *chip = &mac->chip; |
583afd1e UK |
1340 | int is_associated; |
1341 | int r; | |
1342 | ||
1343 | spin_lock_irq(&mac->lock); | |
459c51ad | 1344 | is_associated = mac->associated; |
583afd1e UK |
1345 | spin_unlock_irq(&mac->lock); |
1346 | ||
1347 | r = zd_chip_control_leds(chip, | |
14b46c8a | 1348 | is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); |
583afd1e | 1349 | if (r) |
459c51ad | 1350 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); |
583afd1e UK |
1351 | |
1352 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1353 | LINK_LED_WORK_DELAY); | |
1354 | } | |
1355 | ||
1356 | static void housekeeping_init(struct zd_mac *mac) | |
1357 | { | |
c4028958 | 1358 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
583afd1e UK |
1359 | } |
1360 | ||
1361 | static void housekeeping_enable(struct zd_mac *mac) | |
1362 | { | |
1363 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1364 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1365 | 0); | |
1366 | } | |
1367 | ||
1368 | static void housekeeping_disable(struct zd_mac *mac) | |
1369 | { | |
1370 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
afe2c511 | 1371 | cancel_delayed_work_sync(&mac->housekeeping.link_led_work); |
14b46c8a | 1372 | zd_chip_control_leds(&mac->chip, ZD_LED_OFF); |
583afd1e | 1373 | } |