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); | |
212e1a5b JK |
144 | static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble); |
145 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, | |
dde4673b | 146 | struct sk_buff *beacon, bool in_intr); |
583afd1e | 147 | |
e83a1070 LR |
148 | static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
149 | { | |
150 | unsigned int i; | |
151 | struct zd_reg_alpha2_map *reg_map; | |
152 | for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { | |
153 | reg_map = ®_alpha2_map[i]; | |
154 | if (regdomain == reg_map->reg) { | |
155 | alpha2[0] = reg_map->alpha2[0]; | |
156 | alpha2[1] = reg_map->alpha2[1]; | |
157 | return 0; | |
158 | } | |
159 | } | |
160 | return 1; | |
161 | } | |
162 | ||
7a1d6564 JK |
163 | static int zd_check_signal(struct ieee80211_hw *hw, int signal) |
164 | { | |
165 | struct zd_mac *mac = zd_hw_mac(hw); | |
166 | ||
167 | dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100, | |
168 | "%s: signal value from device not in range 0..100, " | |
169 | "but %d.\n", __func__, signal); | |
170 | ||
171 | if (signal < 0) | |
172 | signal = 0; | |
173 | else if (signal > 100) | |
174 | signal = 100; | |
175 | ||
176 | return signal; | |
177 | } | |
178 | ||
459c51ad | 179 | int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
e85d0918 DD |
180 | { |
181 | int r; | |
e85d0918 | 182 | u8 addr[ETH_ALEN]; |
459c51ad | 183 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed DD |
184 | |
185 | r = zd_chip_read_mac_addr_fw(&mac->chip, addr); | |
186 | if (r) | |
187 | return r; | |
188 | ||
459c51ad DD |
189 | SET_IEEE80211_PERM_ADDR(hw, addr); |
190 | ||
74553aed DD |
191 | return 0; |
192 | } | |
193 | ||
459c51ad | 194 | int zd_mac_init_hw(struct ieee80211_hw *hw) |
74553aed DD |
195 | { |
196 | int r; | |
459c51ad | 197 | struct zd_mac *mac = zd_hw_mac(hw); |
74553aed | 198 | struct zd_chip *chip = &mac->chip; |
e83a1070 | 199 | char alpha2[2]; |
e85d0918 DD |
200 | u8 default_regdomain; |
201 | ||
202 | r = zd_chip_enable_int(chip); | |
203 | if (r) | |
204 | goto out; | |
74553aed | 205 | r = zd_chip_init_hw(chip); |
e85d0918 DD |
206 | if (r) |
207 | goto disable_int; | |
208 | ||
e85d0918 | 209 | ZD_ASSERT(!irqs_disabled()); |
e85d0918 DD |
210 | |
211 | r = zd_read_regdomain(chip, &default_regdomain); | |
212 | if (r) | |
213 | goto disable_int; | |
e85d0918 DD |
214 | spin_lock_irq(&mac->lock); |
215 | mac->regdomain = mac->default_regdomain = default_regdomain; | |
216 | spin_unlock_irq(&mac->lock); | |
e85d0918 | 217 | |
40da08bc DD |
218 | /* We must inform the device that we are doing encryption/decryption in |
219 | * software at the moment. */ | |
220 | r = zd_set_encryption_type(chip, ENC_SNIFFER); | |
e85d0918 DD |
221 | if (r) |
222 | goto disable_int; | |
223 | ||
e83a1070 | 224 | r = zd_reg2alpha2(mac->regdomain, alpha2); |
fe33eb39 LR |
225 | if (r) |
226 | goto disable_int; | |
e85d0918 | 227 | |
fe33eb39 | 228 | r = regulatory_hint(hw->wiphy, alpha2); |
e85d0918 DD |
229 | disable_int: |
230 | zd_chip_disable_int(chip); | |
231 | out: | |
232 | return r; | |
233 | } | |
234 | ||
235 | void zd_mac_clear(struct zd_mac *mac) | |
236 | { | |
9cdac965 | 237 | flush_workqueue(zd_workqueue); |
e85d0918 | 238 | zd_chip_clear(&mac->chip); |
c48cf125 UK |
239 | ZD_ASSERT(!spin_is_locked(&mac->lock)); |
240 | ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); | |
e85d0918 DD |
241 | } |
242 | ||
c5691235 | 243 | static int set_rx_filter(struct zd_mac *mac) |
e85d0918 | 244 | { |
459c51ad DD |
245 | unsigned long flags; |
246 | u32 filter = STA_RX_FILTER; | |
e85d0918 | 247 | |
459c51ad DD |
248 | spin_lock_irqsave(&mac->lock, flags); |
249 | if (mac->pass_ctrl) | |
250 | filter |= RX_FILTER_CTRL; | |
251 | spin_unlock_irqrestore(&mac->lock, flags); | |
252 | ||
253 | return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); | |
c5691235 UK |
254 | } |
255 | ||
c2fadcb3 JK |
256 | static int set_mac_and_bssid(struct zd_mac *mac) |
257 | { | |
258 | int r; | |
259 | ||
260 | if (!mac->vif) | |
261 | return -1; | |
262 | ||
263 | r = zd_write_mac_addr(&mac->chip, mac->vif->addr); | |
264 | if (r) | |
265 | return r; | |
266 | ||
267 | /* Vendor driver after setting MAC either sets BSSID for AP or | |
268 | * filter for other modes. | |
269 | */ | |
270 | if (mac->type != NL80211_IFTYPE_AP) | |
271 | return set_rx_filter(mac); | |
272 | else | |
273 | return zd_write_bssid(&mac->chip, mac->vif->addr); | |
274 | } | |
275 | ||
c5691235 UK |
276 | static int set_mc_hash(struct zd_mac *mac) |
277 | { | |
278 | struct zd_mc_hash hash; | |
c5691235 | 279 | zd_mc_clear(&hash); |
c5691235 UK |
280 | return zd_chip_set_multicast_hash(&mac->chip, &hash); |
281 | } | |
282 | ||
a0fd751f | 283 | int zd_op_start(struct ieee80211_hw *hw) |
e85d0918 | 284 | { |
459c51ad | 285 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 286 | struct zd_chip *chip = &mac->chip; |
74553aed | 287 | struct zd_usb *usb = &chip->usb; |
e85d0918 DD |
288 | int r; |
289 | ||
74553aed DD |
290 | if (!usb->initialized) { |
291 | r = zd_usb_init_hw(usb); | |
292 | if (r) | |
293 | goto out; | |
294 | } | |
295 | ||
e85d0918 DD |
296 | r = zd_chip_enable_int(chip); |
297 | if (r < 0) | |
298 | goto out; | |
299 | ||
300 | r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); | |
301 | if (r < 0) | |
302 | goto disable_int; | |
c5691235 | 303 | r = set_rx_filter(mac); |
c5691235 UK |
304 | if (r) |
305 | goto disable_int; | |
306 | r = set_mc_hash(mac); | |
e85d0918 DD |
307 | if (r) |
308 | goto disable_int; | |
02f1434d FF |
309 | |
310 | /* Wait after setting the multicast hash table and powering on | |
311 | * the radio otherwise interface bring up will fail. This matches | |
312 | * what the vendor driver did. | |
313 | */ | |
314 | msleep(10); | |
315 | ||
e85d0918 | 316 | r = zd_chip_switch_radio_on(chip); |
02f1434d FF |
317 | if (r < 0) { |
318 | dev_err(zd_chip_dev(chip), | |
319 | "%s: failed to set radio on\n", __func__); | |
e85d0918 | 320 | goto disable_int; |
02f1434d | 321 | } |
459c51ad | 322 | r = zd_chip_enable_rxtx(chip); |
e85d0918 DD |
323 | if (r < 0) |
324 | goto disable_radio; | |
325 | r = zd_chip_enable_hwint(chip); | |
326 | if (r < 0) | |
459c51ad | 327 | goto disable_rxtx; |
e85d0918 | 328 | |
583afd1e | 329 | housekeeping_enable(mac); |
9be23256 JK |
330 | beacon_enable(mac); |
331 | set_bit(ZD_DEVICE_RUNNING, &mac->flags); | |
e85d0918 | 332 | return 0; |
459c51ad DD |
333 | disable_rxtx: |
334 | zd_chip_disable_rxtx(chip); | |
e85d0918 DD |
335 | disable_radio: |
336 | zd_chip_switch_radio_off(chip); | |
337 | disable_int: | |
338 | zd_chip_disable_int(chip); | |
339 | out: | |
340 | return r; | |
341 | } | |
342 | ||
a0fd751f | 343 | void zd_op_stop(struct ieee80211_hw *hw) |
459c51ad DD |
344 | { |
345 | struct zd_mac *mac = zd_hw_mac(hw); | |
346 | struct zd_chip *chip = &mac->chip; | |
347 | struct sk_buff *skb; | |
348 | struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; | |
c9a4b35d | 349 | |
9be23256 JK |
350 | clear_bit(ZD_DEVICE_RUNNING, &mac->flags); |
351 | ||
459c51ad | 352 | /* The order here deliberately is a little different from the open() |
e85d0918 | 353 | * method, since we need to make sure there is no opportunity for RX |
459c51ad | 354 | * frames to be processed by mac80211 after we have stopped it. |
e85d0918 DD |
355 | */ |
356 | ||
459c51ad | 357 | zd_chip_disable_rxtx(chip); |
9be23256 | 358 | beacon_disable(mac); |
583afd1e | 359 | housekeeping_disable(mac); |
b1382ede | 360 | flush_workqueue(zd_workqueue); |
b1382ede | 361 | |
e85d0918 DD |
362 | zd_chip_disable_hwint(chip); |
363 | zd_chip_switch_radio_off(chip); | |
364 | zd_chip_disable_int(chip); | |
365 | ||
e85d0918 | 366 | |
459c51ad | 367 | while ((skb = skb_dequeue(ack_wait_queue))) |
e039fa4a | 368 | dev_kfree_skb_any(skb); |
e85d0918 DD |
369 | } |
370 | ||
212e1a5b JK |
371 | int zd_restore_settings(struct zd_mac *mac) |
372 | { | |
373 | struct sk_buff *beacon; | |
374 | struct zd_mc_hash multicast_hash; | |
375 | unsigned int short_preamble; | |
376 | int r, beacon_interval, beacon_period; | |
377 | u8 channel; | |
378 | ||
379 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
380 | ||
381 | spin_lock_irq(&mac->lock); | |
382 | multicast_hash = mac->multicast_hash; | |
383 | short_preamble = mac->short_preamble; | |
384 | beacon_interval = mac->beacon.interval; | |
385 | beacon_period = mac->beacon.period; | |
386 | channel = mac->channel; | |
387 | spin_unlock_irq(&mac->lock); | |
388 | ||
389 | r = set_mac_and_bssid(mac); | |
390 | if (r < 0) { | |
391 | dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r); | |
392 | return r; | |
393 | } | |
394 | ||
395 | r = zd_chip_set_channel(&mac->chip, channel); | |
396 | if (r < 0) { | |
397 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n", | |
398 | r); | |
399 | return r; | |
400 | } | |
401 | ||
402 | set_rts_cts(mac, short_preamble); | |
403 | ||
404 | r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash); | |
405 | if (r < 0) { | |
406 | dev_dbg_f(zd_mac_dev(mac), | |
407 | "zd_chip_set_multicast_hash failed, %d\n", r); | |
408 | return r; | |
409 | } | |
410 | ||
411 | if (mac->type == NL80211_IFTYPE_MESH_POINT || | |
412 | mac->type == NL80211_IFTYPE_ADHOC || | |
413 | mac->type == NL80211_IFTYPE_AP) { | |
414 | if (mac->vif != NULL) { | |
415 | beacon = ieee80211_beacon_get(mac->hw, mac->vif); | |
f762d8c3 | 416 | if (beacon) |
dde4673b | 417 | zd_mac_config_beacon(mac->hw, beacon, false); |
212e1a5b JK |
418 | } |
419 | ||
420 | zd_set_beacon_interval(&mac->chip, beacon_interval, | |
421 | beacon_period, mac->type); | |
422 | ||
423 | spin_lock_irq(&mac->lock); | |
424 | mac->beacon.last_update = jiffies; | |
425 | spin_unlock_irq(&mac->lock); | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
459c51ad | 431 | /** |
7f4013f0 | 432 | * zd_mac_tx_status - reports tx status of a packet if required |
459c51ad DD |
433 | * @hw - a &struct ieee80211_hw pointer |
434 | * @skb - a sk-buffer | |
e039fa4a JB |
435 | * @flags: extra flags to set in the TX status info |
436 | * @ackssi: ACK signal strength | |
73ac36ea | 437 | * @success - True for successful transmission of the frame |
459c51ad DD |
438 | * |
439 | * This information calls ieee80211_tx_status_irqsafe() if required by the | |
440 | * control information. It copies the control information into the status | |
441 | * information. | |
442 | * | |
443 | * If no status information has been requested, the skb is freed. | |
444 | */ | |
7f4013f0 BP |
445 | static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
446 | int ackssi, struct tx_status *tx_status) | |
b1382ede | 447 | { |
e039fa4a | 448 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
7f4013f0 BP |
449 | int i; |
450 | int success = 1, retry = 1; | |
451 | int first_idx; | |
452 | const struct tx_retry_rate *retries; | |
e039fa4a | 453 | |
e6a9854b | 454 | ieee80211_tx_info_clear_status(info); |
b1382ede | 455 | |
7f4013f0 BP |
456 | if (tx_status) { |
457 | success = !tx_status->failure; | |
458 | retry = tx_status->retry + success; | |
459 | } | |
460 | ||
461 | if (success) { | |
462 | /* success */ | |
e6a9854b | 463 | info->flags |= IEEE80211_TX_STAT_ACK; |
7f4013f0 BP |
464 | } else { |
465 | /* failure */ | |
466 | info->flags &= ~IEEE80211_TX_STAT_ACK; | |
467 | } | |
468 | ||
469 | first_idx = info->status.rates[0].idx; | |
470 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
471 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 472 | ZD_ASSERT(1 <= retry && retry <= retries->count); |
7f4013f0 BP |
473 | |
474 | info->status.rates[0].idx = retries->rate[0]; | |
475 | info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); | |
476 | ||
477 | for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { | |
478 | info->status.rates[i].idx = retries->rate[i]; | |
479 | info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); | |
480 | } | |
481 | for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { | |
86baf712 | 482 | info->status.rates[i].idx = retries->rate[retry - 1]; |
7f4013f0 BP |
483 | info->status.rates[i].count = 1; // (success ? 1:2); |
484 | } | |
485 | if (i<IEEE80211_TX_MAX_RATES) | |
486 | info->status.rates[i].idx = -1; /* terminate */ | |
487 | ||
7a1d6564 | 488 | info->status.ack_signal = zd_check_signal(hw, ackssi); |
e039fa4a | 489 | ieee80211_tx_status_irqsafe(hw, skb); |
b1382ede DD |
490 | } |
491 | ||
459c51ad DD |
492 | /** |
493 | * zd_mac_tx_failed - callback for failed frames | |
494 | * @dev: the mac80211 wireless device | |
495 | * | |
303863f4 | 496 | * This function is called if a frame couldn't be successfully |
459c51ad DD |
497 | * transferred. The first frame from the tx queue, will be selected and |
498 | * reported as error to the upper layers. | |
499 | */ | |
7f4013f0 | 500 | void zd_mac_tx_failed(struct urb *urb) |
b1382ede | 501 | { |
7f4013f0 BP |
502 | struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); |
503 | struct zd_mac *mac = zd_hw_mac(hw); | |
504 | struct sk_buff_head *q = &mac->ack_wait_queue; | |
459c51ad | 505 | struct sk_buff *skb; |
7f4013f0 BP |
506 | struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; |
507 | unsigned long flags; | |
508 | int success = !tx_status->failure; | |
509 | int retry = tx_status->retry + success; | |
510 | int found = 0; | |
511 | int i, position = 0; | |
b1382ede | 512 | |
7f4013f0 BP |
513 | q = &mac->ack_wait_queue; |
514 | spin_lock_irqsave(&q->lock, flags); | |
515 | ||
516 | skb_queue_walk(q, skb) { | |
517 | struct ieee80211_hdr *tx_hdr; | |
518 | struct ieee80211_tx_info *info; | |
519 | int first_idx, final_idx; | |
520 | const struct tx_retry_rate *retries; | |
521 | u8 final_rate; | |
522 | ||
523 | position ++; | |
524 | ||
525 | /* if the hardware reports a failure and we had a 802.11 ACK | |
526 | * pending, then we skip the first skb when searching for a | |
527 | * matching frame */ | |
528 | if (tx_status->failure && mac->ack_pending && | |
529 | skb_queue_is_first(q, skb)) { | |
530 | continue; | |
531 | } | |
532 | ||
533 | tx_hdr = (struct ieee80211_hdr *)skb->data; | |
534 | ||
535 | /* we skip all frames not matching the reported destination */ | |
536 | if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) { | |
537 | continue; | |
538 | } | |
539 | ||
540 | /* we skip all frames not matching the reported final rate */ | |
5078ed50 | 541 | |
7f4013f0 BP |
542 | info = IEEE80211_SKB_CB(skb); |
543 | first_idx = info->status.rates[0].idx; | |
544 | ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); | |
545 | retries = &zd_retry_rates[first_idx]; | |
86baf712 | 546 | if (retry <= 0 || retry > retries->count) |
7f4013f0 | 547 | continue; |
7f4013f0 | 548 | |
86baf712 | 549 | final_idx = retries->rate[retry - 1]; |
7f4013f0 BP |
550 | final_rate = zd_rates[final_idx].hw_value; |
551 | ||
552 | if (final_rate != tx_status->rate) { | |
553 | continue; | |
554 | } | |
555 | ||
556 | found = 1; | |
557 | break; | |
558 | } | |
559 | ||
560 | if (found) { | |
561 | for (i=1; i<=position; i++) { | |
562 | skb = __skb_dequeue(q); | |
563 | zd_mac_tx_status(hw, skb, | |
564 | mac->ack_pending ? mac->ack_signal : 0, | |
565 | i == position ? tx_status : NULL); | |
566 | mac->ack_pending = 0; | |
567 | } | |
568 | } | |
569 | ||
570 | spin_unlock_irqrestore(&q->lock, flags); | |
b1382ede DD |
571 | } |
572 | ||
459c51ad DD |
573 | /** |
574 | * zd_mac_tx_to_dev - callback for USB layer | |
575 | * @skb: a &sk_buff pointer | |
576 | * @error: error value, 0 if transmission successful | |
577 | * | |
578 | * Informs the MAC layer that the frame has successfully transferred to the | |
579 | * device. If an ACK is required and the transfer to the device has been | |
580 | * successful, the packets are put on the @ack_wait_queue with | |
581 | * the control set removed. | |
582 | */ | |
583 | void zd_mac_tx_to_dev(struct sk_buff *skb, int error) | |
584 | { | |
e039fa4a | 585 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e6a9854b | 586 | struct ieee80211_hw *hw = info->rate_driver_data[0]; |
7f4013f0 BP |
587 | struct zd_mac *mac = zd_hw_mac(hw); |
588 | ||
589 | ieee80211_tx_info_clear_status(info); | |
b1382ede | 590 | |
e039fa4a JB |
591 | skb_pull(skb, sizeof(struct zd_ctrlset)); |
592 | if (unlikely(error || | |
593 | (info->flags & IEEE80211_TX_CTL_NO_ACK))) { | |
7f4013f0 BP |
594 | /* |
595 | * FIXME : do we need to fill in anything ? | |
596 | */ | |
597 | ieee80211_tx_status_irqsafe(hw, skb); | |
459c51ad | 598 | } else { |
7f4013f0 | 599 | struct sk_buff_head *q = &mac->ack_wait_queue; |
e039fa4a JB |
600 | |
601 | skb_queue_tail(q, skb); | |
7f4013f0 BP |
602 | while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { |
603 | zd_mac_tx_status(hw, skb_dequeue(q), | |
604 | mac->ack_pending ? mac->ack_signal : 0, | |
605 | NULL); | |
606 | mac->ack_pending = 0; | |
607 | } | |
e85d0918 | 608 | } |
e85d0918 DD |
609 | } |
610 | ||
b1cd8416 | 611 | static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) |
e85d0918 | 612 | { |
64f222cc | 613 | /* ZD_PURE_RATE() must be used to remove the modulation type flag of |
459c51ad DD |
614 | * the zd-rate values. |
615 | */ | |
e85d0918 | 616 | static const u8 rate_divisor[] = { |
459c51ad DD |
617 | [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, |
618 | [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, | |
619 | /* Bits must be doubled. */ | |
620 | [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, | |
621 | [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, | |
622 | [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, | |
623 | [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, | |
624 | [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, | |
625 | [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, | |
626 | [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, | |
627 | [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, | |
628 | [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, | |
629 | [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, | |
e85d0918 DD |
630 | }; |
631 | ||
632 | u32 bits = (u32)tx_length * 8; | |
633 | u32 divisor; | |
634 | ||
64f222cc | 635 | divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; |
e85d0918 DD |
636 | if (divisor == 0) |
637 | return -EINVAL; | |
638 | ||
b1cd8416 DD |
639 | switch (zd_rate) { |
640 | case ZD_CCK_RATE_5_5M: | |
e85d0918 DD |
641 | bits = (2*bits) + 10; /* round up to the next integer */ |
642 | break; | |
b1cd8416 | 643 | case ZD_CCK_RATE_11M: |
e85d0918 DD |
644 | if (service) { |
645 | u32 t = bits % 11; | |
646 | *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
647 | if (0 < t && t <= 3) { | |
648 | *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; | |
649 | } | |
650 | } | |
651 | bits += 10; /* round up to the next integer */ | |
652 | break; | |
653 | } | |
654 | ||
655 | return bits/divisor; | |
656 | } | |
657 | ||
e85d0918 | 658 | static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, |
e6a9854b JB |
659 | struct ieee80211_hdr *header, |
660 | struct ieee80211_tx_info *info) | |
e85d0918 | 661 | { |
e85d0918 | 662 | /* |
b1382ede | 663 | * CONTROL TODO: |
e85d0918 DD |
664 | * - if backoff needed, enable bit 0 |
665 | * - if burst (backoff not needed) disable bit 0 | |
e85d0918 DD |
666 | */ |
667 | ||
668 | cs->control = 0; | |
669 | ||
670 | /* First fragment */ | |
e6a9854b | 671 | if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) |
e85d0918 DD |
672 | cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; |
673 | ||
13bdcd90 GS |
674 | /* No ACK expected (multicast, etc.) */ |
675 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) | |
676 | cs->control |= ZD_CS_NO_ACK; | |
e85d0918 DD |
677 | |
678 | /* PS-POLL */ | |
85365820 | 679 | if (ieee80211_is_pspoll(header->frame_control)) |
e85d0918 DD |
680 | cs->control |= ZD_CS_PS_POLL_FRAME; |
681 | ||
e6a9854b | 682 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) |
b1382ede DD |
683 | cs->control |= ZD_CS_RTS; |
684 | ||
e6a9854b | 685 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) |
b1382ede | 686 | cs->control |= ZD_CS_SELF_CTS; |
e85d0918 DD |
687 | |
688 | /* FIXME: Management frame? */ | |
689 | } | |
690 | ||
f762d8c3 JK |
691 | static bool zd_mac_match_cur_beacon(struct zd_mac *mac, struct sk_buff *beacon) |
692 | { | |
693 | if (!mac->beacon.cur_beacon) | |
694 | return false; | |
695 | ||
696 | if (mac->beacon.cur_beacon->len != beacon->len) | |
697 | return false; | |
698 | ||
699 | return !memcmp(beacon->data, mac->beacon.cur_beacon->data, beacon->len); | |
700 | } | |
701 | ||
702 | static void zd_mac_free_cur_beacon_locked(struct zd_mac *mac) | |
703 | { | |
704 | ZD_ASSERT(mutex_is_locked(&mac->chip.mutex)); | |
705 | ||
706 | kfree_skb(mac->beacon.cur_beacon); | |
707 | mac->beacon.cur_beacon = NULL; | |
708 | } | |
709 | ||
710 | static void zd_mac_free_cur_beacon(struct zd_mac *mac) | |
711 | { | |
712 | mutex_lock(&mac->chip.mutex); | |
713 | zd_mac_free_cur_beacon_locked(mac); | |
714 | mutex_unlock(&mac->chip.mutex); | |
715 | } | |
716 | ||
dde4673b JK |
717 | static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon, |
718 | bool in_intr) | |
72e77a8a LCC |
719 | { |
720 | struct zd_mac *mac = zd_hw_mac(hw); | |
51272292 | 721 | int r, ret, num_cmds, req_pos = 0; |
72e77a8a LCC |
722 | u32 tmp, j = 0; |
723 | /* 4 more bytes for tail CRC */ | |
724 | u32 full_len = beacon->len + 4; | |
9be23256 | 725 | unsigned long end_jiffies, message_jiffies; |
51272292 JK |
726 | struct zd_ioreq32 *ioreqs; |
727 | ||
f762d8c3 JK |
728 | mutex_lock(&mac->chip.mutex); |
729 | ||
730 | /* Check if hw already has this beacon. */ | |
731 | if (zd_mac_match_cur_beacon(mac, beacon)) { | |
732 | r = 0; | |
733 | goto out_nofree; | |
734 | } | |
735 | ||
51272292 JK |
736 | /* Alloc memory for full beacon write at once. */ |
737 | num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len; | |
738 | ioreqs = kmalloc(num_cmds * sizeof(struct zd_ioreq32), GFP_KERNEL); | |
f762d8c3 JK |
739 | if (!ioreqs) { |
740 | r = -ENOMEM; | |
741 | goto out_nofree; | |
742 | } | |
f2cae6c5 | 743 | |
9be23256 | 744 | r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 745 | if (r < 0) |
9be23256 JK |
746 | goto out; |
747 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); | |
f2cae6c5 | 748 | if (r < 0) |
9be23256 | 749 | goto release_sema; |
dde4673b JK |
750 | if (in_intr && tmp & 0x2) { |
751 | r = -EBUSY; | |
752 | goto release_sema; | |
753 | } | |
f2cae6c5 | 754 | |
9be23256 JK |
755 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ |
756 | message_jiffies = jiffies + HZ / 10; /*~100ms*/ | |
72e77a8a | 757 | while (tmp & 0x2) { |
9be23256 | 758 | r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); |
f2cae6c5 | 759 | if (r < 0) |
9be23256 JK |
760 | goto release_sema; |
761 | if (time_is_before_eq_jiffies(message_jiffies)) { | |
762 | message_jiffies = jiffies + HZ / 10; | |
763 | dev_err(zd_mac_dev(mac), | |
764 | "CR_BCN_FIFO_SEMAPHORE not ready\n"); | |
765 | if (time_is_before_eq_jiffies(end_jiffies)) { | |
766 | dev_err(zd_mac_dev(mac), | |
767 | "Giving up beacon config.\n"); | |
768 | r = -ETIMEDOUT; | |
3985a465 | 769 | goto reset_device; |
72e77a8a LCC |
770 | } |
771 | } | |
9be23256 | 772 | msleep(20); |
72e77a8a LCC |
773 | } |
774 | ||
51272292 JK |
775 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
776 | ioreqs[req_pos].value = full_len - 1; | |
777 | req_pos++; | |
f2cae6c5 | 778 | if (zd_chip_is_zd1211b(&mac->chip)) { |
51272292 JK |
779 | ioreqs[req_pos].addr = CR_BCN_LENGTH; |
780 | ioreqs[req_pos].value = full_len - 1; | |
781 | req_pos++; | |
f2cae6c5 | 782 | } |
72e77a8a | 783 | |
f2cae6c5 | 784 | for (j = 0 ; j < beacon->len; j++) { |
51272292 JK |
785 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
786 | ioreqs[req_pos].value = *((u8 *)(beacon->data + j)); | |
787 | req_pos++; | |
f2cae6c5 | 788 | } |
72e77a8a | 789 | |
f2cae6c5 | 790 | for (j = 0; j < 4; j++) { |
51272292 JK |
791 | ioreqs[req_pos].addr = CR_BCN_FIFO; |
792 | ioreqs[req_pos].value = 0x0; | |
793 | req_pos++; | |
f2cae6c5 DD |
794 | } |
795 | ||
51272292 JK |
796 | BUG_ON(req_pos != num_cmds); |
797 | ||
798 | r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds); | |
799 | ||
9be23256 JK |
800 | release_sema: |
801 | /* | |
802 | * Try very hard to release device beacon semaphore, as otherwise | |
803 | * device/driver can be left in unusable state. | |
804 | */ | |
805 | end_jiffies = jiffies + HZ / 2; /*~500ms*/ | |
806 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
807 | while (ret < 0) { | |
dde4673b | 808 | if (in_intr || time_is_before_eq_jiffies(end_jiffies)) { |
9be23256 JK |
809 | ret = -ETIMEDOUT; |
810 | break; | |
811 | } | |
812 | ||
813 | msleep(20); | |
814 | ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); | |
815 | } | |
816 | ||
817 | if (ret < 0) | |
818 | dev_err(zd_mac_dev(mac), "Could not release " | |
819 | "CR_BCN_FIFO_SEMAPHORE!\n"); | |
820 | if (r < 0 || ret < 0) { | |
821 | if (r >= 0) | |
822 | r = ret; | |
f762d8c3 JK |
823 | |
824 | /* We don't know if beacon was written successfully or not, | |
825 | * so clear current. */ | |
826 | zd_mac_free_cur_beacon_locked(mac); | |
827 | ||
9be23256 JK |
828 | goto out; |
829 | } | |
72e77a8a | 830 | |
f762d8c3 JK |
831 | /* Beacon has now been written successfully, update current. */ |
832 | zd_mac_free_cur_beacon_locked(mac); | |
833 | mac->beacon.cur_beacon = beacon; | |
834 | beacon = NULL; | |
835 | ||
72e77a8a LCC |
836 | /* 802.11b/g 2.4G CCK 1Mb |
837 | * 802.11a, not yet implemented, uses different values (see GPL vendor | |
838 | * driver) | |
839 | */ | |
9be23256 JK |
840 | r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19), |
841 | CR_BCN_PLCP_CFG); | |
842 | out: | |
51272292 | 843 | kfree(ioreqs); |
f762d8c3 JK |
844 | out_nofree: |
845 | kfree_skb(beacon); | |
846 | mutex_unlock(&mac->chip.mutex); | |
847 | ||
9be23256 | 848 | return r; |
3985a465 JK |
849 | |
850 | reset_device: | |
f762d8c3 JK |
851 | zd_mac_free_cur_beacon_locked(mac); |
852 | kfree_skb(beacon); | |
853 | ||
3985a465 JK |
854 | mutex_unlock(&mac->chip.mutex); |
855 | kfree(ioreqs); | |
856 | ||
857 | /* semaphore stuck, reset device to avoid fw freeze later */ | |
858 | dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, " | |
50db7fa3 | 859 | "resetting device..."); |
3985a465 JK |
860 | usb_queue_reset_device(mac->chip.usb.intf); |
861 | ||
862 | return r; | |
72e77a8a LCC |
863 | } |
864 | ||
e85d0918 | 865 | static int fill_ctrlset(struct zd_mac *mac, |
e039fa4a | 866 | struct sk_buff *skb) |
e85d0918 DD |
867 | { |
868 | int r; | |
459c51ad DD |
869 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
870 | unsigned int frag_len = skb->len + FCS_LEN; | |
e85d0918 | 871 | unsigned int packet_length; |
2e92e6f2 | 872 | struct ieee80211_rate *txrate; |
e85d0918 DD |
873 | struct zd_ctrlset *cs = (struct zd_ctrlset *) |
874 | skb_push(skb, sizeof(struct zd_ctrlset)); | |
e039fa4a | 875 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
e85d0918 | 876 | |
e85d0918 | 877 | ZD_ASSERT(frag_len <= 0xffff); |
e85d0918 | 878 | |
e81a7bd5 TV |
879 | /* |
880 | * Firmware computes the duration itself (for all frames except PSPoll) | |
881 | * and needs the field set to 0 at input, otherwise firmware messes up | |
882 | * duration_id and sets bits 14 and 15 on. | |
883 | */ | |
884 | if (!ieee80211_is_pspoll(hdr->frame_control)) | |
885 | hdr->duration_id = 0; | |
886 | ||
e039fa4a | 887 | txrate = ieee80211_get_tx_rate(mac->hw, info); |
2e92e6f2 JB |
888 | |
889 | cs->modulation = txrate->hw_value; | |
e6a9854b | 890 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) |
2e92e6f2 | 891 | cs->modulation = txrate->hw_value_short; |
e85d0918 DD |
892 | |
893 | cs->tx_length = cpu_to_le16(frag_len); | |
894 | ||
e6a9854b | 895 | cs_set_control(mac, cs, hdr, info); |
e85d0918 DD |
896 | |
897 | packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; | |
898 | ZD_ASSERT(packet_length <= 0xffff); | |
899 | /* ZD1211B: Computing the length difference this way, gives us | |
900 | * flexibility to compute the packet length. | |
901 | */ | |
74553aed | 902 | cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? |
e85d0918 DD |
903 | packet_length - frag_len : packet_length); |
904 | ||
905 | /* | |
906 | * CURRENT LENGTH: | |
907 | * - transmit frame length in microseconds | |
908 | * - seems to be derived from frame length | |
909 | * - see Cal_Us_Service() in zdinlinef.h | |
910 | * - if macp->bTxBurstEnable is enabled, then multiply by 4 | |
911 | * - bTxBurstEnable is never set in the vendor driver | |
912 | * | |
913 | * SERVICE: | |
914 | * - "for PLCP configuration" | |
915 | * - always 0 except in some situations at 802.11b 11M | |
916 | * - see line 53 of zdinlinef.h | |
917 | */ | |
918 | cs->service = 0; | |
64f222cc | 919 | r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), |
e85d0918 DD |
920 | le16_to_cpu(cs->tx_length)); |
921 | if (r < 0) | |
922 | return r; | |
923 | cs->current_length = cpu_to_le16(r); | |
459c51ad | 924 | cs->next_frame_length = 0; |
e85d0918 DD |
925 | |
926 | return 0; | |
927 | } | |
928 | ||
459c51ad DD |
929 | /** |
930 | * zd_op_tx - transmits a network frame to the device | |
931 | * | |
932 | * @dev: mac80211 hardware device | |
933 | * @skb: socket buffer | |
934 | * @control: the control structure | |
935 | * | |
936 | * This function transmit an IEEE 802.11 network frame to the device. The | |
937 | * control block of the skbuff will be initialized. If necessary the incoming | |
938 | * mac80211 queues will be stopped. | |
939 | */ | |
36323f81 TH |
940 | static void zd_op_tx(struct ieee80211_hw *hw, |
941 | struct ieee80211_tx_control *control, | |
942 | struct sk_buff *skb) | |
e85d0918 | 943 | { |
459c51ad | 944 | struct zd_mac *mac = zd_hw_mac(hw); |
e039fa4a | 945 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
459c51ad | 946 | int r; |
e85d0918 | 947 | |
e039fa4a | 948 | r = fill_ctrlset(mac, skb); |
459c51ad | 949 | if (r) |
640c65ea | 950 | goto fail; |
e85d0918 | 951 | |
e6a9854b | 952 | info->rate_driver_data[0] = hw; |
e039fa4a | 953 | |
459c51ad | 954 | r = zd_usb_tx(&mac->chip.usb, skb); |
e039fa4a | 955 | if (r) |
640c65ea | 956 | goto fail; |
7bb45683 | 957 | return; |
640c65ea JM |
958 | |
959 | fail: | |
960 | dev_kfree_skb(skb); | |
e85d0918 DD |
961 | } |
962 | ||
459c51ad DD |
963 | /** |
964 | * filter_ack - filters incoming packets for acknowledgements | |
965 | * @dev: the mac80211 device | |
966 | * @rx_hdr: received header | |
967 | * @stats: the status for the received packet | |
741fec53 | 968 | * |
459c51ad DD |
969 | * This functions looks for ACK packets and tries to match them with the |
970 | * frames in the tx queue. If a match is found the frame will be dequeued and | |
971 | * the upper layers is informed about the successful transmission. If | |
972 | * mac80211 queues have been stopped and the number of frames still to be | |
973 | * transmitted is low the queues will be opened again. | |
e85d0918 | 974 | * |
459c51ad | 975 | * Returns 1 if the frame was an ACK, 0 if it was ignored. |
e85d0918 | 976 | */ |
459c51ad DD |
977 | static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, |
978 | struct ieee80211_rx_status *stats) | |
e85d0918 | 979 | { |
7f4013f0 | 980 | struct zd_mac *mac = zd_hw_mac(hw); |
459c51ad DD |
981 | struct sk_buff *skb; |
982 | struct sk_buff_head *q; | |
983 | unsigned long flags; | |
7f4013f0 BP |
984 | int found = 0; |
985 | int i, position = 0; | |
e85d0918 | 986 | |
85365820 | 987 | if (!ieee80211_is_ack(rx_hdr->frame_control)) |
e85d0918 | 988 | return 0; |
e85d0918 | 989 | |
7f4013f0 | 990 | q = &mac->ack_wait_queue; |
459c51ad | 991 | spin_lock_irqsave(&q->lock, flags); |
47a227db | 992 | skb_queue_walk(q, skb) { |
459c51ad DD |
993 | struct ieee80211_hdr *tx_hdr; |
994 | ||
7f4013f0 BP |
995 | position ++; |
996 | ||
997 | if (mac->ack_pending && skb_queue_is_first(q, skb)) | |
998 | continue; | |
999 | ||
459c51ad | 1000 | tx_hdr = (struct ieee80211_hdr *)skb->data; |
cde6901b | 1001 | if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) |
459c51ad | 1002 | { |
7f4013f0 BP |
1003 | found = 1; |
1004 | break; | |
459c51ad DD |
1005 | } |
1006 | } | |
7f4013f0 BP |
1007 | |
1008 | if (found) { | |
1009 | for (i=1; i<position; i++) { | |
1010 | skb = __skb_dequeue(q); | |
1011 | zd_mac_tx_status(hw, skb, | |
1012 | mac->ack_pending ? mac->ack_signal : 0, | |
1013 | NULL); | |
1014 | mac->ack_pending = 0; | |
1015 | } | |
1016 | ||
1017 | mac->ack_pending = 1; | |
1018 | mac->ack_signal = stats->signal; | |
f773e409 JK |
1019 | |
1020 | /* Prevent pending tx-packet on AP-mode */ | |
1021 | if (mac->type == NL80211_IFTYPE_AP) { | |
1022 | skb = __skb_dequeue(q); | |
1023 | zd_mac_tx_status(hw, skb, mac->ack_signal, NULL); | |
1024 | mac->ack_pending = 0; | |
1025 | } | |
7f4013f0 BP |
1026 | } |
1027 | ||
459c51ad DD |
1028 | spin_unlock_irqrestore(&q->lock, flags); |
1029 | return 1; | |
e85d0918 DD |
1030 | } |
1031 | ||
459c51ad | 1032 | int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) |
e85d0918 | 1033 | { |
459c51ad DD |
1034 | struct zd_mac *mac = zd_hw_mac(hw); |
1035 | struct ieee80211_rx_status stats; | |
1036 | const struct rx_status *status; | |
1037 | struct sk_buff *skb; | |
1038 | int bad_frame = 0; | |
85365820 HH |
1039 | __le16 fc; |
1040 | int need_padding; | |
8318d78a JB |
1041 | int i; |
1042 | u8 rate; | |
db888aed | 1043 | |
459c51ad DD |
1044 | if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + |
1045 | FCS_LEN + sizeof(struct rx_status)) | |
1046 | return -EINVAL; | |
e85d0918 | 1047 | |
459c51ad | 1048 | memset(&stats, 0, sizeof(stats)); |
e85d0918 | 1049 | |
459c51ad DD |
1050 | /* Note about pass_failed_fcs and pass_ctrl access below: |
1051 | * mac locking intentionally omitted here, as this is the only unlocked | |
1052 | * reader and the only writer is configure_filter. Plus, if there were | |
1053 | * any races accessing these variables, it wouldn't really matter. | |
1054 | * If mac80211 ever provides a way for us to access filter flags | |
1055 | * from outside configure_filter, we could improve on this. Also, this | |
1056 | * situation may change once we implement some kind of DMA-into-skb | |
1057 | * RX path. */ | |
e85d0918 | 1058 | |
459c51ad DD |
1059 | /* Caller has to ensure that length >= sizeof(struct rx_status). */ |
1060 | status = (struct rx_status *) | |
937a049d | 1061 | (buffer + (length - sizeof(struct rx_status))); |
e85d0918 | 1062 | if (status->frame_status & ZD_RX_ERROR) { |
459c51ad DD |
1063 | if (mac->pass_failed_fcs && |
1064 | (status->frame_status & ZD_RX_CRC32_ERROR)) { | |
1065 | stats.flag |= RX_FLAG_FAILED_FCS_CRC; | |
1066 | bad_frame = 1; | |
1067 | } else { | |
1068 | return -EINVAL; | |
22d3405f | 1069 | } |
e85d0918 | 1070 | } |
22d3405f | 1071 | |
8318d78a JB |
1072 | stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; |
1073 | stats.band = IEEE80211_BAND_2GHZ; | |
7a1d6564 | 1074 | stats.signal = zd_check_signal(hw, status->signal_strength); |
8318d78a JB |
1075 | |
1076 | rate = zd_rx_rate(buffer, status); | |
1077 | ||
1078 | /* todo: return index in the big switches in zd_rx_rate instead */ | |
1079 | for (i = 0; i < mac->band.n_bitrates; i++) | |
1080 | if (rate == mac->band.bitrates[i].hw_value) | |
1081 | stats.rate_idx = i; | |
459c51ad DD |
1082 | |
1083 | length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); | |
1084 | buffer += ZD_PLCP_HEADER_SIZE; | |
1085 | ||
1086 | /* Except for bad frames, filter each frame to see if it is an ACK, in | |
1087 | * which case our internal TX tracking is updated. Normally we then | |
1088 | * bail here as there's no need to pass ACKs on up to the stack, but | |
1089 | * there is also the case where the stack has requested us to pass | |
1090 | * control frames on up (pass_ctrl) which we must consider. */ | |
1091 | if (!bad_frame && | |
1092 | filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) | |
1093 | && !mac->pass_ctrl) | |
1094 | return 0; | |
e85d0918 | 1095 | |
42935eca | 1096 | fc = get_unaligned((__le16*)buffer); |
85365820 | 1097 | need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); |
9081728b MB |
1098 | |
1099 | skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); | |
459c51ad DD |
1100 | if (skb == NULL) |
1101 | return -ENOMEM; | |
9081728b | 1102 | if (need_padding) { |
77c2061d | 1103 | /* Make sure the payload data is 4 byte aligned. */ |
9081728b MB |
1104 | skb_reserve(skb, 2); |
1105 | } | |
1106 | ||
7f4013f0 | 1107 | /* FIXME : could we avoid this big memcpy ? */ |
459c51ad DD |
1108 | memcpy(skb_put(skb, length), buffer, length); |
1109 | ||
f1d58c25 JB |
1110 | memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); |
1111 | ieee80211_rx_irqsafe(hw, skb); | |
e85d0918 DD |
1112 | return 0; |
1113 | } | |
1114 | ||
459c51ad | 1115 | static int zd_op_add_interface(struct ieee80211_hw *hw, |
1ed32e4f | 1116 | struct ieee80211_vif *vif) |
e85d0918 | 1117 | { |
459c51ad | 1118 | struct zd_mac *mac = zd_hw_mac(hw); |
e85d0918 | 1119 | |
05c914fe JB |
1120 | /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ |
1121 | if (mac->type != NL80211_IFTYPE_UNSPECIFIED) | |
459c51ad | 1122 | return -EOPNOTSUPP; |
e85d0918 | 1123 | |
1ed32e4f | 1124 | switch (vif->type) { |
05c914fe JB |
1125 | case NL80211_IFTYPE_MONITOR: |
1126 | case NL80211_IFTYPE_MESH_POINT: | |
1127 | case NL80211_IFTYPE_STATION: | |
1128 | case NL80211_IFTYPE_ADHOC: | |
ab419e9b | 1129 | case NL80211_IFTYPE_AP: |
1ed32e4f | 1130 | mac->type = vif->type; |
459c51ad DD |
1131 | break; |
1132 | default: | |
1133 | return -EOPNOTSUPP; | |
4d1feabc | 1134 | } |
e85d0918 | 1135 | |
c2fadcb3 JK |
1136 | mac->vif = vif; |
1137 | ||
1138 | return set_mac_and_bssid(mac); | |
459c51ad | 1139 | } |
e85d0918 | 1140 | |
459c51ad | 1141 | static void zd_op_remove_interface(struct ieee80211_hw *hw, |
1ed32e4f | 1142 | struct ieee80211_vif *vif) |
459c51ad DD |
1143 | { |
1144 | struct zd_mac *mac = zd_hw_mac(hw); | |
05c914fe | 1145 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
c2fadcb3 | 1146 | mac->vif = NULL; |
b91a515d | 1147 | zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED); |
459c51ad | 1148 | zd_write_mac_addr(&mac->chip, NULL); |
f762d8c3 JK |
1149 | |
1150 | zd_mac_free_cur_beacon(mac); | |
459c51ad | 1151 | } |
93137943 | 1152 | |
e8975581 | 1153 | static int zd_op_config(struct ieee80211_hw *hw, u32 changed) |
459c51ad DD |
1154 | { |
1155 | struct zd_mac *mac = zd_hw_mac(hw); | |
e8975581 JB |
1156 | struct ieee80211_conf *conf = &hw->conf; |
1157 | ||
212e1a5b | 1158 | spin_lock_irq(&mac->lock); |
675a0b04 | 1159 | mac->channel = conf->chandef.chan->hw_value; |
212e1a5b JK |
1160 | spin_unlock_irq(&mac->lock); |
1161 | ||
675a0b04 | 1162 | return zd_chip_set_channel(&mac->chip, conf->chandef.chan->hw_value); |
459c51ad | 1163 | } |
db888aed | 1164 | |
4099e2f4 JK |
1165 | static void zd_beacon_done(struct zd_mac *mac) |
1166 | { | |
1167 | struct sk_buff *skb, *beacon; | |
1168 | ||
9be23256 JK |
1169 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) |
1170 | return; | |
4099e2f4 JK |
1171 | if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP) |
1172 | return; | |
1173 | ||
1174 | /* | |
1175 | * Send out buffered broad- and multicast frames. | |
1176 | */ | |
1177 | while (!ieee80211_queue_stopped(mac->hw, 0)) { | |
1178 | skb = ieee80211_get_buffered_bc(mac->hw, mac->vif); | |
1179 | if (!skb) | |
1180 | break; | |
36323f81 | 1181 | zd_op_tx(mac->hw, NULL, skb); |
4099e2f4 JK |
1182 | } |
1183 | ||
1184 | /* | |
1185 | * Fetch next beacon so that tim_count is updated. | |
1186 | */ | |
1187 | beacon = ieee80211_beacon_get(mac->hw, mac->vif); | |
f762d8c3 | 1188 | if (beacon) |
dde4673b | 1189 | zd_mac_config_beacon(mac->hw, beacon, true); |
4099e2f4 | 1190 | |
9be23256 JK |
1191 | spin_lock_irq(&mac->lock); |
1192 | mac->beacon.last_update = jiffies; | |
1193 | spin_unlock_irq(&mac->lock); | |
4099e2f4 JK |
1194 | } |
1195 | ||
e83a1070 | 1196 | static void zd_process_intr(struct work_struct *work) |
72e77a8a LCC |
1197 | { |
1198 | u16 int_status; | |
8b17f75c | 1199 | unsigned long flags; |
72e77a8a LCC |
1200 | struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); |
1201 | ||
8b17f75c JK |
1202 | spin_lock_irqsave(&mac->lock, flags); |
1203 | int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4)); | |
1204 | spin_unlock_irqrestore(&mac->lock, flags); | |
1205 | ||
4099e2f4 JK |
1206 | if (int_status & INT_CFG_NEXT_BCN) { |
1207 | /*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/ | |
1208 | zd_beacon_done(mac); | |
1209 | } else { | |
72e77a8a | 1210 | dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); |
4099e2f4 | 1211 | } |
72e77a8a LCC |
1212 | |
1213 | zd_chip_enable_hwint(&mac->chip); | |
1214 | } | |
1215 | ||
1216 | ||
3ac64bee | 1217 | static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, |
22bedad3 | 1218 | struct netdev_hw_addr_list *mc_list) |
3ac64bee JB |
1219 | { |
1220 | struct zd_mac *mac = zd_hw_mac(hw); | |
1221 | struct zd_mc_hash hash; | |
22bedad3 | 1222 | struct netdev_hw_addr *ha; |
3ac64bee JB |
1223 | |
1224 | zd_mc_clear(&hash); | |
1225 | ||
22bedad3 JP |
1226 | netdev_hw_addr_list_for_each(ha, mc_list) { |
1227 | dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", ha->addr); | |
1228 | zd_mc_add_addr(&hash, ha->addr); | |
3ac64bee JB |
1229 | } |
1230 | ||
1231 | return hash.low | ((u64)hash.high << 32); | |
1232 | } | |
1233 | ||
459c51ad DD |
1234 | #define SUPPORTED_FIF_FLAGS \ |
1235 | (FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ | |
2c1a1b12 | 1236 | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) |
459c51ad DD |
1237 | static void zd_op_configure_filter(struct ieee80211_hw *hw, |
1238 | unsigned int changed_flags, | |
1239 | unsigned int *new_flags, | |
3ac64bee | 1240 | u64 multicast) |
e85d0918 | 1241 | { |
3ac64bee JB |
1242 | struct zd_mc_hash hash = { |
1243 | .low = multicast, | |
1244 | .high = multicast >> 32, | |
1245 | }; | |
459c51ad DD |
1246 | struct zd_mac *mac = zd_hw_mac(hw); |
1247 | unsigned long flags; | |
a6fb071b | 1248 | int r; |
e85d0918 | 1249 | |
459c51ad DD |
1250 | /* Only deal with supported flags */ |
1251 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
1252 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
1253 | ||
7de3c5dc BP |
1254 | /* |
1255 | * If multicast parameter (as returned by zd_op_prepare_multicast) | |
1256 | * has changed, no bit in changed_flags is set. To handle this | |
1257 | * situation, we do not return if changed_flags is 0. If we do so, | |
1258 | * we will have some issue with IPv6 which uses multicast for link | |
1259 | * layer address resolution. | |
1260 | */ | |
3ac64bee | 1261 | if (*new_flags & (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)) |
459c51ad | 1262 | zd_mc_add_all(&hash); |
459c51ad DD |
1263 | |
1264 | spin_lock_irqsave(&mac->lock, flags); | |
1265 | mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); | |
1266 | mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); | |
1267 | mac->multicast_hash = hash; | |
1268 | spin_unlock_irqrestore(&mac->lock, flags); | |
3ac64bee | 1269 | |
a6fb071b | 1270 | zd_chip_set_multicast_hash(&mac->chip, &hash); |
459c51ad | 1271 | |
a6fb071b JK |
1272 | if (changed_flags & FIF_CONTROL) { |
1273 | r = set_rx_filter(mac); | |
1274 | if (r) | |
1275 | dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r); | |
1276 | } | |
459c51ad DD |
1277 | |
1278 | /* no handling required for FIF_OTHER_BSS as we don't currently | |
1279 | * do BSSID filtering */ | |
1280 | /* FIXME: in future it would be nice to enable the probe response | |
1281 | * filter (so that the driver doesn't see them) until | |
1282 | * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd | |
1283 | * have to schedule work to enable prbresp reception, which might | |
1284 | * happen too late. For now we'll just listen and forward them all the | |
1285 | * time. */ | |
e85d0918 DD |
1286 | } |
1287 | ||
5cf6cf81 | 1288 | static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble) |
e85d0918 | 1289 | { |
459c51ad | 1290 | mutex_lock(&mac->chip.mutex); |
459c51ad DD |
1291 | zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); |
1292 | mutex_unlock(&mac->chip.mutex); | |
e85d0918 DD |
1293 | } |
1294 | ||
471b3efd JB |
1295 | static void zd_op_bss_info_changed(struct ieee80211_hw *hw, |
1296 | struct ieee80211_vif *vif, | |
1297 | struct ieee80211_bss_conf *bss_conf, | |
1298 | u32 changes) | |
e85d0918 | 1299 | { |
459c51ad | 1300 | struct zd_mac *mac = zd_hw_mac(hw); |
2d0ddec5 | 1301 | int associated; |
459c51ad DD |
1302 | |
1303 | dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); | |
1304 | ||
2d0ddec5 | 1305 | if (mac->type == NL80211_IFTYPE_MESH_POINT || |
ab419e9b JK |
1306 | mac->type == NL80211_IFTYPE_ADHOC || |
1307 | mac->type == NL80211_IFTYPE_AP) { | |
2d0ddec5 JB |
1308 | associated = true; |
1309 | if (changes & BSS_CHANGED_BEACON) { | |
1310 | struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); | |
1311 | ||
1312 | if (beacon) { | |
9be23256 | 1313 | zd_chip_disable_hwint(&mac->chip); |
dde4673b | 1314 | zd_mac_config_beacon(hw, beacon, false); |
9be23256 | 1315 | zd_chip_enable_hwint(&mac->chip); |
2d0ddec5 JB |
1316 | } |
1317 | } | |
1318 | ||
1319 | if (changes & BSS_CHANGED_BEACON_ENABLED) { | |
b91a515d JK |
1320 | u16 interval = 0; |
1321 | u8 period = 0; | |
2d0ddec5 | 1322 | |
b91a515d JK |
1323 | if (bss_conf->enable_beacon) { |
1324 | period = bss_conf->dtim_period; | |
1325 | interval = bss_conf->beacon_int; | |
1326 | } | |
2d0ddec5 | 1327 | |
9be23256 JK |
1328 | spin_lock_irq(&mac->lock); |
1329 | mac->beacon.period = period; | |
1330 | mac->beacon.interval = interval; | |
1331 | mac->beacon.last_update = jiffies; | |
1332 | spin_unlock_irq(&mac->lock); | |
1333 | ||
b91a515d JK |
1334 | zd_set_beacon_interval(&mac->chip, interval, period, |
1335 | mac->type); | |
2d0ddec5 JB |
1336 | } |
1337 | } else | |
1338 | associated = is_valid_ether_addr(bss_conf->bssid); | |
1339 | ||
1340 | spin_lock_irq(&mac->lock); | |
1341 | mac->associated = associated; | |
1342 | spin_unlock_irq(&mac->lock); | |
1343 | ||
1344 | /* TODO: do hardware bssid filtering */ | |
1345 | ||
471b3efd | 1346 | if (changes & BSS_CHANGED_ERP_PREAMBLE) { |
5cf6cf81 | 1347 | spin_lock_irq(&mac->lock); |
471b3efd | 1348 | mac->short_preamble = bss_conf->use_short_preamble; |
5cf6cf81 JK |
1349 | spin_unlock_irq(&mac->lock); |
1350 | ||
1351 | set_rts_cts(mac, bss_conf->use_short_preamble); | |
459c51ad | 1352 | } |
e85d0918 DD |
1353 | } |
1354 | ||
37a41b4a | 1355 | static u64 zd_op_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) |
5fe73197 AF |
1356 | { |
1357 | struct zd_mac *mac = zd_hw_mac(hw); | |
1358 | return zd_chip_get_tsf(&mac->chip); | |
1359 | } | |
1360 | ||
459c51ad DD |
1361 | static const struct ieee80211_ops zd_ops = { |
1362 | .tx = zd_op_tx, | |
1363 | .start = zd_op_start, | |
1364 | .stop = zd_op_stop, | |
1365 | .add_interface = zd_op_add_interface, | |
1366 | .remove_interface = zd_op_remove_interface, | |
1367 | .config = zd_op_config, | |
3ac64bee | 1368 | .prepare_multicast = zd_op_prepare_multicast, |
459c51ad | 1369 | .configure_filter = zd_op_configure_filter, |
471b3efd | 1370 | .bss_info_changed = zd_op_bss_info_changed, |
5fe73197 | 1371 | .get_tsf = zd_op_get_tsf, |
459c51ad DD |
1372 | }; |
1373 | ||
1374 | struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) | |
e85d0918 | 1375 | { |
459c51ad DD |
1376 | struct zd_mac *mac; |
1377 | struct ieee80211_hw *hw; | |
e85d0918 | 1378 | |
459c51ad DD |
1379 | hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); |
1380 | if (!hw) { | |
1381 | dev_dbg_f(&intf->dev, "out of memory\n"); | |
1382 | return NULL; | |
db888aed | 1383 | } |
459c51ad DD |
1384 | |
1385 | mac = zd_hw_mac(hw); | |
1386 | ||
1387 | memset(mac, 0, sizeof(*mac)); | |
1388 | spin_lock_init(&mac->lock); | |
1389 | mac->hw = hw; | |
1390 | ||
05c914fe | 1391 | mac->type = NL80211_IFTYPE_UNSPECIFIED; |
459c51ad DD |
1392 | |
1393 | memcpy(mac->channels, zd_channels, sizeof(zd_channels)); | |
1394 | memcpy(mac->rates, zd_rates, sizeof(zd_rates)); | |
8318d78a JB |
1395 | mac->band.n_bitrates = ARRAY_SIZE(zd_rates); |
1396 | mac->band.bitrates = mac->rates; | |
1397 | mac->band.n_channels = ARRAY_SIZE(zd_channels); | |
1398 | mac->band.channels = mac->channels; | |
1399 | ||
1400 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band; | |
1401 | ||
72e77a8a | 1402 | hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | |
4099e2f4 | 1403 | IEEE80211_HW_SIGNAL_UNSPEC | |
959cd68d JK |
1404 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | |
1405 | IEEE80211_HW_MFP_CAPABLE; | |
459c51ad | 1406 | |
f59ac048 LR |
1407 | hw->wiphy->interface_modes = |
1408 | BIT(NL80211_IFTYPE_MESH_POINT) | | |
1409 | BIT(NL80211_IFTYPE_STATION) | | |
ab419e9b JK |
1410 | BIT(NL80211_IFTYPE_ADHOC) | |
1411 | BIT(NL80211_IFTYPE_AP); | |
f59ac048 | 1412 | |
566bfe5a | 1413 | hw->max_signal = 100; |
459c51ad DD |
1414 | hw->queues = 1; |
1415 | hw->extra_tx_headroom = sizeof(struct zd_ctrlset); | |
1416 | ||
7f4013f0 BP |
1417 | /* |
1418 | * Tell mac80211 that we support multi rate retries | |
1419 | */ | |
1420 | hw->max_rates = IEEE80211_TX_MAX_RATES; | |
1421 | hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ | |
1422 | ||
459c51ad | 1423 | skb_queue_head_init(&mac->ack_wait_queue); |
7f4013f0 | 1424 | mac->ack_pending = 0; |
459c51ad | 1425 | |
459c51ad DD |
1426 | zd_chip_init(&mac->chip, hw, intf); |
1427 | housekeeping_init(mac); | |
9be23256 | 1428 | beacon_init(mac); |
72e77a8a | 1429 | INIT_WORK(&mac->process_intr, zd_process_intr); |
459c51ad DD |
1430 | |
1431 | SET_IEEE80211_DEV(hw, &intf->dev); | |
1432 | return hw; | |
e85d0918 DD |
1433 | } |
1434 | ||
9be23256 JK |
1435 | #define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ) |
1436 | ||
1437 | static void beacon_watchdog_handler(struct work_struct *work) | |
1438 | { | |
1439 | struct zd_mac *mac = | |
1440 | container_of(work, struct zd_mac, beacon.watchdog_work.work); | |
1441 | struct sk_buff *beacon; | |
1442 | unsigned long timeout; | |
1443 | int interval, period; | |
1444 | ||
1445 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) | |
1446 | goto rearm; | |
1447 | if (mac->type != NL80211_IFTYPE_AP || !mac->vif) | |
1448 | goto rearm; | |
1449 | ||
1450 | spin_lock_irq(&mac->lock); | |
1451 | interval = mac->beacon.interval; | |
1452 | period = mac->beacon.period; | |
55f7782e JK |
1453 | timeout = mac->beacon.last_update + |
1454 | msecs_to_jiffies(interval * 1024 / 1000) * 3; | |
9be23256 JK |
1455 | spin_unlock_irq(&mac->lock); |
1456 | ||
1457 | if (interval > 0 && time_is_before_jiffies(timeout)) { | |
1458 | dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, " | |
1459 | "restarting. " | |
1460 | "(interval: %d, dtim: %d)\n", | |
1461 | interval, period); | |
1462 | ||
1463 | zd_chip_disable_hwint(&mac->chip); | |
1464 | ||
1465 | beacon = ieee80211_beacon_get(mac->hw, mac->vif); | |
1466 | if (beacon) { | |
f762d8c3 JK |
1467 | zd_mac_free_cur_beacon(mac); |
1468 | ||
dde4673b | 1469 | zd_mac_config_beacon(mac->hw, beacon, false); |
9be23256 JK |
1470 | } |
1471 | ||
1472 | zd_set_beacon_interval(&mac->chip, interval, period, mac->type); | |
1473 | ||
1474 | zd_chip_enable_hwint(&mac->chip); | |
1475 | ||
1476 | spin_lock_irq(&mac->lock); | |
1477 | mac->beacon.last_update = jiffies; | |
1478 | spin_unlock_irq(&mac->lock); | |
1479 | } | |
1480 | ||
1481 | rearm: | |
1482 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1483 | BEACON_WATCHDOG_DELAY); | |
1484 | } | |
1485 | ||
1486 | static void beacon_init(struct zd_mac *mac) | |
1487 | { | |
1488 | INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler); | |
1489 | } | |
1490 | ||
1491 | static void beacon_enable(struct zd_mac *mac) | |
1492 | { | |
1493 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1494 | ||
1495 | mac->beacon.last_update = jiffies; | |
1496 | queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, | |
1497 | BEACON_WATCHDOG_DELAY); | |
1498 | } | |
1499 | ||
1500 | static void beacon_disable(struct zd_mac *mac) | |
1501 | { | |
1502 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1503 | cancel_delayed_work_sync(&mac->beacon.watchdog_work); | |
f762d8c3 JK |
1504 | |
1505 | zd_mac_free_cur_beacon(mac); | |
9be23256 JK |
1506 | } |
1507 | ||
583afd1e UK |
1508 | #define LINK_LED_WORK_DELAY HZ |
1509 | ||
c4028958 | 1510 | static void link_led_handler(struct work_struct *work) |
583afd1e | 1511 | { |
c4028958 DH |
1512 | struct zd_mac *mac = |
1513 | container_of(work, struct zd_mac, housekeeping.link_led_work.work); | |
583afd1e | 1514 | struct zd_chip *chip = &mac->chip; |
583afd1e UK |
1515 | int is_associated; |
1516 | int r; | |
1517 | ||
a0fd751f JK |
1518 | if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) |
1519 | goto requeue; | |
1520 | ||
583afd1e | 1521 | spin_lock_irq(&mac->lock); |
459c51ad | 1522 | is_associated = mac->associated; |
583afd1e UK |
1523 | spin_unlock_irq(&mac->lock); |
1524 | ||
1525 | r = zd_chip_control_leds(chip, | |
14b46c8a | 1526 | is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); |
583afd1e | 1527 | if (r) |
459c51ad | 1528 | dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); |
583afd1e | 1529 | |
a0fd751f | 1530 | requeue: |
583afd1e UK |
1531 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, |
1532 | LINK_LED_WORK_DELAY); | |
1533 | } | |
1534 | ||
1535 | static void housekeeping_init(struct zd_mac *mac) | |
1536 | { | |
c4028958 | 1537 | INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); |
583afd1e UK |
1538 | } |
1539 | ||
1540 | static void housekeeping_enable(struct zd_mac *mac) | |
1541 | { | |
1542 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
1543 | queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, | |
1544 | 0); | |
1545 | } | |
1546 | ||
1547 | static void housekeeping_disable(struct zd_mac *mac) | |
1548 | { | |
1549 | dev_dbg_f(zd_mac_dev(mac), "\n"); | |
afe2c511 | 1550 | cancel_delayed_work_sync(&mac->housekeeping.link_led_work); |
14b46c8a | 1551 | zd_chip_control_leds(&mac->chip, ZD_LED_OFF); |
583afd1e | 1552 | } |