?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iwlwifi: Packing all 4965 parameters
[linux-2.6.git] / drivers / net / wireless / iwlwifi / iwl-4965.c
blob2e54dae95751ecec077d4ccdab6dbabfa248326a
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 * Contact Information:
22 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24 *
25 *****************************************************************************/
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/version.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/wireless.h>
37 #include <net/mac80211.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
40
41 #include "iwl-eeprom.h"
42 #include "iwl-core.h"
43 #include "iwl-4965.h"
44 #include "iwl-helpers.h"
45
46 static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
47
48 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
49 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
50 IWL_RATE_SISO_##s##M_PLCP, \
51 IWL_RATE_MIMO_##s##M_PLCP, \
52 IWL_RATE_##r##M_IEEE, \
53 IWL_RATE_##ip##M_INDEX, \
54 IWL_RATE_##in##M_INDEX, \
55 IWL_RATE_##rp##M_INDEX, \
56 IWL_RATE_##rn##M_INDEX, \
57 IWL_RATE_##pp##M_INDEX, \
58 IWL_RATE_##np##M_INDEX }
59
60 /*
61 * Parameter order:
62 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
63 *
64 * If there isn't a valid next or previous rate then INV is used which
65 * maps to IWL_RATE_INVALID
66 *
67 */
68 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
69 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
70 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
71 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
72 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
73 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
74 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
75 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
76 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
77 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
78 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
79 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
80 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
81 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
82 };
83
84 #ifdef CONFIG_IWL4965_HT
85
86 static const u16 default_tid_to_tx_fifo[] = {
87 IWL_TX_FIFO_AC1,
88 IWL_TX_FIFO_AC0,
89 IWL_TX_FIFO_AC0,
90 IWL_TX_FIFO_AC1,
91 IWL_TX_FIFO_AC2,
92 IWL_TX_FIFO_AC2,
93 IWL_TX_FIFO_AC3,
94 IWL_TX_FIFO_AC3,
95 IWL_TX_FIFO_NONE,
96 IWL_TX_FIFO_NONE,
97 IWL_TX_FIFO_NONE,
98 IWL_TX_FIFO_NONE,
99 IWL_TX_FIFO_NONE,
100 IWL_TX_FIFO_NONE,
101 IWL_TX_FIFO_NONE,
102 IWL_TX_FIFO_NONE,
103 IWL_TX_FIFO_AC3
104 };
105
106 #endif /*CONFIG_IWL4965_HT */
107
108 static int is_fat_channel(__le32 rxon_flags)
109 {
110 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
111 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
112 }
113
114 static u8 is_single_stream(struct iwl_priv *priv)
115 {
116 #ifdef CONFIG_IWL4965_HT
117 if (!priv->current_ht_config.is_ht ||
118 (priv->current_ht_config.supp_mcs_set[1] == 0) ||
119 (priv->ps_mode == IWL_MIMO_PS_STATIC))
120 return 1;
121 #else
122 return 1;
123 #endif /*CONFIG_IWL4965_HT */
124 return 0;
125 }
126
127 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
128 {
129 int idx = 0;
130
131 /* 4965 HT rate format */
132 if (rate_n_flags & RATE_MCS_HT_MSK) {
133 idx = (rate_n_flags & 0xff);
134
135 if (idx >= IWL_RATE_MIMO_6M_PLCP)
136 idx = idx - IWL_RATE_MIMO_6M_PLCP;
137
138 idx += IWL_FIRST_OFDM_RATE;
139 /* skip 9M not supported in ht*/
140 if (idx >= IWL_RATE_9M_INDEX)
141 idx += 1;
142 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
143 return idx;
144
145 /* 4965 legacy rate format, search for match in table */
146 } else {
147 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
148 if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
149 return idx;
150 }
151
152 return -1;
153 }
154
155 /**
156 * translate ucode response to mac80211 tx status control values
157 */
158 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
159 struct ieee80211_tx_control *control)
160 {
161 int rate_index;
162
163 control->antenna_sel_tx =
164 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
165 if (rate_n_flags & RATE_MCS_HT_MSK)
166 control->flags |= IEEE80211_TXCTL_OFDM_HT;
167 if (rate_n_flags & RATE_MCS_GF_MSK)
168 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
169 if (rate_n_flags & RATE_MCS_FAT_MSK)
170 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
171 if (rate_n_flags & RATE_MCS_DUP_MSK)
172 control->flags |= IEEE80211_TXCTL_DUP_DATA;
173 if (rate_n_flags & RATE_MCS_SGI_MSK)
174 control->flags |= IEEE80211_TXCTL_SHORT_GI;
175 /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
176 * IEEE80211_BAND_2GHZ band as it contains all the rates */
177 rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
178 if (rate_index == -1)
179 control->tx_rate = NULL;
180 else
181 control->tx_rate =
182 &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
183 }
184
185 /*
186 * Determine how many receiver/antenna chains to use.
187 * More provides better reception via diversity. Fewer saves power.
188 * MIMO (dual stream) requires at least 2, but works better with 3.
189 * This does not determine *which* chains to use, just how many.
190 */
191 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
192 u8 *idle_state, u8 *rx_state)
193 {
194 u8 is_single = is_single_stream(priv);
195 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
196
197 /* # of Rx chains to use when expecting MIMO. */
198 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
199 *rx_state = 2;
200 else
201 *rx_state = 3;
202
203 /* # Rx chains when idling and maybe trying to save power */
204 switch (priv->ps_mode) {
205 case IWL_MIMO_PS_STATIC:
206 case IWL_MIMO_PS_DYNAMIC:
207 *idle_state = (is_cam) ? 2 : 1;
208 break;
209 case IWL_MIMO_PS_NONE:
210 *idle_state = (is_cam) ? *rx_state : 1;
211 break;
212 default:
213 *idle_state = 1;
214 break;
215 }
216
217 return 0;
218 }
219
220 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
221 {
222 int rc;
223 unsigned long flags;
224
225 spin_lock_irqsave(&priv->lock, flags);
226 rc = iwl4965_grab_nic_access(priv);
227 if (rc) {
228 spin_unlock_irqrestore(&priv->lock, flags);
229 return rc;
230 }
231
232 /* stop Rx DMA */
233 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
234 rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
235 (1 << 24), 1000);
236 if (rc < 0)
237 IWL_ERROR("Can't stop Rx DMA.\n");
238
239 iwl4965_release_nic_access(priv);
240 spin_unlock_irqrestore(&priv->lock, flags);
241
242 return 0;
243 }
244
245 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
246 {
247 int i;
248 int start = 0;
249 int ret = IWL_INVALID_STATION;
250 unsigned long flags;
251 DECLARE_MAC_BUF(mac);
252
253 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
254 (priv->iw_mode == IEEE80211_IF_TYPE_AP))
255 start = IWL_STA_ID;
256
257 if (is_broadcast_ether_addr(addr))
258 return priv->hw_setting.bcast_sta_id;
259
260 spin_lock_irqsave(&priv->sta_lock, flags);
261 for (i = start; i < priv->hw_setting.max_stations; i++)
262 if ((priv->stations[i].used) &&
263 (!compare_ether_addr
264 (priv->stations[i].sta.sta.addr, addr))) {
265 ret = i;
266 goto out;
267 }
268
269 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
270 print_mac(mac, addr), priv->num_stations);
271
272 out:
273 spin_unlock_irqrestore(&priv->sta_lock, flags);
274 return ret;
275 }
276
277 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
278 {
279 int ret;
280 unsigned long flags;
281
282 spin_lock_irqsave(&priv->lock, flags);
283 ret = iwl4965_grab_nic_access(priv);
284 if (ret) {
285 spin_unlock_irqrestore(&priv->lock, flags);
286 return ret;
287 }
288
289 if (!pwr_max) {
290 u32 val;
291
292 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
293 &val);
294
295 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
296 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
297 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
298 ~APMG_PS_CTRL_MSK_PWR_SRC);
299 } else
300 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
301 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
302 ~APMG_PS_CTRL_MSK_PWR_SRC);
303
304 iwl4965_release_nic_access(priv);
305 spin_unlock_irqrestore(&priv->lock, flags);
306
307 return ret;
308 }
309
310 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
311 {
312 int rc;
313 unsigned long flags;
314 unsigned int rb_size;
315
316 spin_lock_irqsave(&priv->lock, flags);
317 rc = iwl4965_grab_nic_access(priv);
318 if (rc) {
319 spin_unlock_irqrestore(&priv->lock, flags);
320 return rc;
321 }
322
323 if (iwl4965_mod_params.amsdu_size_8K)
324 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
325 else
326 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
327
328 /* Stop Rx DMA */
329 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
330
331 /* Reset driver's Rx queue write index */
332 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
333
334 /* Tell device where to find RBD circular buffer in DRAM */
335 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
336 rxq->dma_addr >> 8);
337
338 /* Tell device where in DRAM to update its Rx status */
339 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
340 (priv->hw_setting.shared_phys +
341 offsetof(struct iwl4965_shared, val0)) >> 4);
342
343 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
344 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
345 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
346 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
347 rb_size |
348 /*0x10 << 4 | */
349 (RX_QUEUE_SIZE_LOG <<
350 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
351
352 /*
353 * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
354 */
355
356 iwl4965_release_nic_access(priv);
357 spin_unlock_irqrestore(&priv->lock, flags);
358
359 return 0;
360 }
361
362 /* Tell 4965 where to find the "keep warm" buffer */
363 static int iwl4965_kw_init(struct iwl_priv *priv)
364 {
365 unsigned long flags;
366 int rc;
367
368 spin_lock_irqsave(&priv->lock, flags);
369 rc = iwl4965_grab_nic_access(priv);
370 if (rc)
371 goto out;
372
373 iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
374 priv->kw.dma_addr >> 4);
375 iwl4965_release_nic_access(priv);
376 out:
377 spin_unlock_irqrestore(&priv->lock, flags);
378 return rc;
379 }
380
381 static int iwl4965_kw_alloc(struct iwl_priv *priv)
382 {
383 struct pci_dev *dev = priv->pci_dev;
384 struct iwl4965_kw *kw = &priv->kw;
385
386 kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
387 kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
388 if (!kw->v_addr)
389 return -ENOMEM;
390
391 return 0;
392 }
393
394 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
395 ? # x " " : "")
396
397 /**
398 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
399 *
400 * Does not set up a command, or touch hardware.
401 */
402 int iwl4965_set_fat_chan_info(struct iwl_priv *priv,
403 enum ieee80211_band band, u16 channel,
404 const struct iwl4965_eeprom_channel *eeprom_ch,
405 u8 fat_extension_channel)
406 {
407 struct iwl4965_channel_info *ch_info;
408
409 ch_info = (struct iwl4965_channel_info *)
410 iwl4965_get_channel_info(priv, band, channel);
411
412 if (!is_channel_valid(ch_info))
413 return -1;
414
415 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
416 " %ddBm): Ad-Hoc %ssupported\n",
417 ch_info->channel,
418 is_channel_a_band(ch_info) ?
419 "5.2" : "2.4",
420 CHECK_AND_PRINT(IBSS),
421 CHECK_AND_PRINT(ACTIVE),
422 CHECK_AND_PRINT(RADAR),
423 CHECK_AND_PRINT(WIDE),
424 CHECK_AND_PRINT(NARROW),
425 CHECK_AND_PRINT(DFS),
426 eeprom_ch->flags,
427 eeprom_ch->max_power_avg,
428 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
429 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
430 "" : "not ");
431
432 ch_info->fat_eeprom = *eeprom_ch;
433 ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
434 ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
435 ch_info->fat_min_power = 0;
436 ch_info->fat_scan_power = eeprom_ch->max_power_avg;
437 ch_info->fat_flags = eeprom_ch->flags;
438 ch_info->fat_extension_channel = fat_extension_channel;
439
440 return 0;
441 }
442
443 /**
444 * iwl4965_kw_free - Free the "keep warm" buffer
445 */
446 static void iwl4965_kw_free(struct iwl_priv *priv)
447 {
448 struct pci_dev *dev = priv->pci_dev;
449 struct iwl4965_kw *kw = &priv->kw;
450
451 if (kw->v_addr) {
452 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
453 memset(kw, 0, sizeof(*kw));
454 }
455 }
456
457 /**
458 * iwl4965_txq_ctx_reset - Reset TX queue context
459 * Destroys all DMA structures and initialise them again
460 *
461 * @param priv
462 * @return error code
463 */
464 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
465 {
466 int rc = 0;
467 int txq_id, slots_num;
468 unsigned long flags;
469
470 iwl4965_kw_free(priv);
471
472 /* Free all tx/cmd queues and keep-warm buffer */
473 iwl4965_hw_txq_ctx_free(priv);
474
475 /* Alloc keep-warm buffer */
476 rc = iwl4965_kw_alloc(priv);
477 if (rc) {
478 IWL_ERROR("Keep Warm allocation failed");
479 goto error_kw;
480 }
481
482 spin_lock_irqsave(&priv->lock, flags);
483
484 rc = iwl4965_grab_nic_access(priv);
485 if (unlikely(rc)) {
486 IWL_ERROR("TX reset failed");
487 spin_unlock_irqrestore(&priv->lock, flags);
488 goto error_reset;
489 }
490
491 /* Turn off all Tx DMA channels */
492 iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
493 iwl4965_release_nic_access(priv);
494 spin_unlock_irqrestore(&priv->lock, flags);
495
496 /* Tell 4965 where to find the keep-warm buffer */
497 rc = iwl4965_kw_init(priv);
498 if (rc) {
499 IWL_ERROR("kw_init failed\n");
500 goto error_reset;
501 }
502
503 /* Alloc and init all (default 16) Tx queues,
504 * including the command queue (#4) */
505 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
506 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
507 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
508 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
509 txq_id);
510 if (rc) {
511 IWL_ERROR("Tx %d queue init failed\n", txq_id);
512 goto error;
513 }
514 }
515
516 return rc;
517
518 error:
519 iwl4965_hw_txq_ctx_free(priv);
520 error_reset:
521 iwl4965_kw_free(priv);
522 error_kw:
523 return rc;
524 }
525
526 int iwl4965_hw_nic_init(struct iwl_priv *priv)
527 {
528 int rc;
529 unsigned long flags;
530 struct iwl4965_rx_queue *rxq = &priv->rxq;
531 u8 rev_id;
532 u32 val;
533 u8 val_link;
534
535 iwl4965_power_init_handle(priv);
536
537 /* nic_init */
538 spin_lock_irqsave(&priv->lock, flags);
539
540 iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
541 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
542
543 iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
544 rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
545 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
546 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
547 if (rc < 0) {
548 spin_unlock_irqrestore(&priv->lock, flags);
549 IWL_DEBUG_INFO("Failed to init the card\n");
550 return rc;
551 }
552
553 rc = iwl4965_grab_nic_access(priv);
554 if (rc) {
555 spin_unlock_irqrestore(&priv->lock, flags);
556 return rc;
557 }
558
559 iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
560
561 iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
562 APMG_CLK_VAL_DMA_CLK_RQT |
563 APMG_CLK_VAL_BSM_CLK_RQT);
564 iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
565
566 udelay(20);
567
568 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
569 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
570
571 iwl4965_release_nic_access(priv);
572 iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
573 spin_unlock_irqrestore(&priv->lock, flags);
574
575 /* Determine HW type */
576 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
577 if (rc)
578 return rc;
579
580 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
581
582 iwl4965_nic_set_pwr_src(priv, 1);
583 spin_lock_irqsave(&priv->lock, flags);
584
585 if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
586 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
587 /* Enable No Snoop field */
588 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
589 val & ~(1 << 11));
590 }
591
592 spin_unlock_irqrestore(&priv->lock, flags);
593
594 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
595 IWL_ERROR("Older EEPROM detected! Aborting.\n");
596 return -EINVAL;
597 }
598
599 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
600
601 /* disable L1 entry -- workaround for pre-B1 */
602 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
603
604 spin_lock_irqsave(&priv->lock, flags);
605
606 /* set CSR_HW_CONFIG_REG for uCode use */
607
608 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
609 CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
610 CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
611 CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
612
613 rc = iwl4965_grab_nic_access(priv);
614 if (rc < 0) {
615 spin_unlock_irqrestore(&priv->lock, flags);
616 IWL_DEBUG_INFO("Failed to init the card\n");
617 return rc;
618 }
619
620 iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
621 iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
622 APMG_PS_CTRL_VAL_RESET_REQ);
623 udelay(5);
624 iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
625 APMG_PS_CTRL_VAL_RESET_REQ);
626
627 iwl4965_release_nic_access(priv);
628 spin_unlock_irqrestore(&priv->lock, flags);
629
630 iwl4965_hw_card_show_info(priv);
631
632 /* end nic_init */
633
634 /* Allocate the RX queue, or reset if it is already allocated */
635 if (!rxq->bd) {
636 rc = iwl4965_rx_queue_alloc(priv);
637 if (rc) {
638 IWL_ERROR("Unable to initialize Rx queue\n");
639 return -ENOMEM;
640 }
641 } else
642 iwl4965_rx_queue_reset(priv, rxq);
643
644 iwl4965_rx_replenish(priv);
645
646 iwl4965_rx_init(priv, rxq);
647
648 spin_lock_irqsave(&priv->lock, flags);
649
650 rxq->need_update = 1;
651 iwl4965_rx_queue_update_write_ptr(priv, rxq);
652
653 spin_unlock_irqrestore(&priv->lock, flags);
654
655 /* Allocate and init all Tx and Command queues */
656 rc = iwl4965_txq_ctx_reset(priv);
657 if (rc)
658 return rc;
659
660 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
661 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
662
663 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
664 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
665
666 set_bit(STATUS_INIT, &priv->status);
667
668 return 0;
669 }
670
671 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
672 {
673 int rc = 0;
674 u32 reg_val;
675 unsigned long flags;
676
677 spin_lock_irqsave(&priv->lock, flags);
678
679 /* set stop master bit */
680 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
681
682 reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
683
684 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
685 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
686 IWL_DEBUG_INFO("Card in power save, master is already "
687 "stopped\n");
688 else {
689 rc = iwl4965_poll_bit(priv, CSR_RESET,
690 CSR_RESET_REG_FLAG_MASTER_DISABLED,
691 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
692 if (rc < 0) {
693 spin_unlock_irqrestore(&priv->lock, flags);
694 return rc;
695 }
696 }
697
698 spin_unlock_irqrestore(&priv->lock, flags);
699 IWL_DEBUG_INFO("stop master\n");
700
701 return rc;
702 }
703
704 /**
705 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
706 */
707 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
708 {
709
710 int txq_id;
711 unsigned long flags;
712
713 /* Stop each Tx DMA channel, and wait for it to be idle */
714 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
715 spin_lock_irqsave(&priv->lock, flags);
716 if (iwl4965_grab_nic_access(priv)) {
717 spin_unlock_irqrestore(&priv->lock, flags);
718 continue;
719 }
720
721 iwl4965_write_direct32(priv,
722 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
723 0x0);
724 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
725 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
726 (txq_id), 200);
727 iwl4965_release_nic_access(priv);
728 spin_unlock_irqrestore(&priv->lock, flags);
729 }
730
731 /* Deallocate memory for all Tx queues */
732 iwl4965_hw_txq_ctx_free(priv);
733 }
734
735 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
736 {
737 int rc = 0;
738 unsigned long flags;
739
740 iwl4965_hw_nic_stop_master(priv);
741
742 spin_lock_irqsave(&priv->lock, flags);
743
744 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
745
746 udelay(10);
747
748 iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
749 rc = iwl4965_poll_bit(priv, CSR_RESET,
750 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
751 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
752
753 udelay(10);
754
755 rc = iwl4965_grab_nic_access(priv);
756 if (!rc) {
757 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
758 APMG_CLK_VAL_DMA_CLK_RQT |
759 APMG_CLK_VAL_BSM_CLK_RQT);
760
761 udelay(10);
762
763 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
764 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
765
766 iwl4965_release_nic_access(priv);
767 }
768
769 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
770 wake_up_interruptible(&priv->wait_command_queue);
771
772 spin_unlock_irqrestore(&priv->lock, flags);
773
774 return rc;
775
776 }
777
778 #define REG_RECALIB_PERIOD (60)
779
780 /**
781 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
782 *
783 * This callback is provided in order to queue the statistics_work
784 * in work_queue context (v. softirq)
785 *
786 * This timer function is continually reset to execute within
787 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
788 * was received. We need to ensure we receive the statistics in order
789 * to update the temperature used for calibrating the TXPOWER. However,
790 * we can't send the statistics command from softirq context (which
791 * is the context which timers run at) so we have to queue off the
792 * statistics_work to actually send the command to the hardware.
793 */
794 static void iwl4965_bg_statistics_periodic(unsigned long data)
795 {
796 struct iwl_priv *priv = (struct iwl_priv *)data;
797
798 queue_work(priv->workqueue, &priv->statistics_work);
799 }
800
801 /**
802 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
803 *
804 * This is queued by iwl4965_bg_statistics_periodic.
805 */
806 static void iwl4965_bg_statistics_work(struct work_struct *work)
807 {
808 struct iwl_priv *priv = container_of(work, struct iwl_priv,
809 statistics_work);
810
811 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
812 return;
813
814 mutex_lock(&priv->mutex);
815 iwl4965_send_statistics_request(priv);
816 mutex_unlock(&priv->mutex);
817 }
818
819 #define CT_LIMIT_CONST 259
820 #define TM_CT_KILL_THRESHOLD 110
821
822 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
823 {
824 struct iwl4965_ct_kill_config cmd;
825 u32 R1, R2, R3;
826 u32 temp_th;
827 u32 crit_temperature;
828 unsigned long flags;
829 int rc = 0;
830
831 spin_lock_irqsave(&priv->lock, flags);
832 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
833 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
834 spin_unlock_irqrestore(&priv->lock, flags);
835
836 if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
837 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
838 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
839 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
840 } else {
841 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
842 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
843 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
844 }
845
846 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
847
848 crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
849 cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
850 rc = iwl4965_send_cmd_pdu(priv,
851 REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
852 if (rc)
853 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
854 else
855 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
856 }
857
858 #ifdef CONFIG_IWL4965_SENSITIVITY
859
860 /* "false alarms" are signals that our DSP tries to lock onto,
861 * but then determines that they are either noise, or transmissions
862 * from a distant wireless network (also "noise", really) that get
863 * "stepped on" by stronger transmissions within our own network.
864 * This algorithm attempts to set a sensitivity level that is high
865 * enough to receive all of our own network traffic, but not so
866 * high that our DSP gets too busy trying to lock onto non-network
867 * activity/noise. */
868 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
869 u32 norm_fa,
870 u32 rx_enable_time,
871 struct statistics_general_data *rx_info)
872 {
873 u32 max_nrg_cck = 0;
874 int i = 0;
875 u8 max_silence_rssi = 0;
876 u32 silence_ref = 0;
877 u8 silence_rssi_a = 0;
878 u8 silence_rssi_b = 0;
879 u8 silence_rssi_c = 0;
880 u32 val;
881
882 /* "false_alarms" values below are cross-multiplications to assess the
883 * numbers of false alarms within the measured period of actual Rx
884 * (Rx is off when we're txing), vs the min/max expected false alarms
885 * (some should be expected if rx is sensitive enough) in a
886 * hypothetical listening period of 200 time units (TU), 204.8 msec:
887 *
888 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
889 *
890 * */
891 u32 false_alarms = norm_fa * 200 * 1024;
892 u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
893 u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
894 struct iwl4965_sensitivity_data *data = NULL;
895
896 data = &(priv->sensitivity_data);
897
898 data->nrg_auto_corr_silence_diff = 0;
899
900 /* Find max silence rssi among all 3 receivers.
901 * This is background noise, which may include transmissions from other
902 * networks, measured during silence before our network's beacon */
903 silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
904 ALL_BAND_FILTER) >> 8);
905 silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
906 ALL_BAND_FILTER) >> 8);
907 silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
908 ALL_BAND_FILTER) >> 8);
909
910 val = max(silence_rssi_b, silence_rssi_c);
911 max_silence_rssi = max(silence_rssi_a, (u8) val);
912
913 /* Store silence rssi in 20-beacon history table */
914 data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
915 data->nrg_silence_idx++;
916 if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
917 data->nrg_silence_idx = 0;
918
919 /* Find max silence rssi across 20 beacon history */
920 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
921 val = data->nrg_silence_rssi[i];
922 silence_ref = max(silence_ref, val);
923 }
924 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
925 silence_rssi_a, silence_rssi_b, silence_rssi_c,
926 silence_ref);
927
928 /* Find max rx energy (min value!) among all 3 receivers,
929 * measured during beacon frame.
930 * Save it in 10-beacon history table. */
931 i = data->nrg_energy_idx;
932 val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
933 data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
934
935 data->nrg_energy_idx++;
936 if (data->nrg_energy_idx >= 10)
937 data->nrg_energy_idx = 0;
938
939 /* Find min rx energy (max value) across 10 beacon history.
940 * This is the minimum signal level that we want to receive well.
941 * Add backoff (margin so we don't miss slightly lower energy frames).
942 * This establishes an upper bound (min value) for energy threshold. */
943 max_nrg_cck = data->nrg_value[0];
944 for (i = 1; i < 10; i++)
945 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
946 max_nrg_cck += 6;
947
948 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
949 rx_info->beacon_energy_a, rx_info->beacon_energy_b,
950 rx_info->beacon_energy_c, max_nrg_cck - 6);
951
952 /* Count number of consecutive beacons with fewer-than-desired
953 * false alarms. */
954 if (false_alarms < min_false_alarms)
955 data->num_in_cck_no_fa++;
956 else
957 data->num_in_cck_no_fa = 0;
958 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
959 data->num_in_cck_no_fa);
960
961 /* If we got too many false alarms this time, reduce sensitivity */
962 if (false_alarms > max_false_alarms) {
963 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
964 false_alarms, max_false_alarms);
965 IWL_DEBUG_CALIB("... reducing sensitivity\n");
966 data->nrg_curr_state = IWL_FA_TOO_MANY;
967
968 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
969 /* Store for "fewer than desired" on later beacon */
970 data->nrg_silence_ref = silence_ref;
971
972 /* increase energy threshold (reduce nrg value)
973 * to decrease sensitivity */
974 if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
975 data->nrg_th_cck = data->nrg_th_cck
976 - NRG_STEP_CCK;
977 }
978
979 /* increase auto_corr values to decrease sensitivity */
980 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
981 data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
982 else {
983 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
984 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
985 }
986 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
987 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
988
989 /* Else if we got fewer than desired, increase sensitivity */
990 } else if (false_alarms < min_false_alarms) {
991 data->nrg_curr_state = IWL_FA_TOO_FEW;
992
993 /* Compare silence level with silence level for most recent
994 * healthy number or too many false alarms */
995 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
996 (s32)silence_ref;
997
998 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
999 false_alarms, min_false_alarms,
1000 data->nrg_auto_corr_silence_diff);
1001
1002 /* Increase value to increase sensitivity, but only if:
1003 * 1a) previous beacon did *not* have *too many* false alarms
1004 * 1b) AND there's a significant difference in Rx levels
1005 * from a previous beacon with too many, or healthy # FAs
1006 * OR 2) We've seen a lot of beacons (100) with too few
1007 * false alarms */
1008 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1009 ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1010 (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1011
1012 IWL_DEBUG_CALIB("... increasing sensitivity\n");
1013 /* Increase nrg value to increase sensitivity */
1014 val = data->nrg_th_cck + NRG_STEP_CCK;
1015 data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1016
1017 /* Decrease auto_corr values to increase sensitivity */
1018 val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1019 data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1020
1021 val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1022 data->auto_corr_cck_mrc =
1023 max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1024
1025 } else
1026 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1027
1028 /* Else we got a healthy number of false alarms, keep status quo */
1029 } else {
1030 IWL_DEBUG_CALIB(" FA in safe zone\n");
1031 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1032
1033 /* Store for use in "fewer than desired" with later beacon */
1034 data->nrg_silence_ref = silence_ref;
1035
1036 /* If previous beacon had too many false alarms,
1037 * give it some extra margin by reducing sensitivity again
1038 * (but don't go below measured energy of desired Rx) */
1039 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1040 IWL_DEBUG_CALIB("... increasing margin\n");
1041 data->nrg_th_cck -= NRG_MARGIN;
1042 }
1043 }
1044
1045 /* Make sure the energy threshold does not go above the measured
1046 * energy of the desired Rx signals (reduced by backoff margin),
1047 * or else we might start missing Rx frames.
1048 * Lower value is higher energy, so we use max()!
1049 */
1050 data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1051 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1052
1053 data->nrg_prev_state = data->nrg_curr_state;
1054
1055 return 0;
1056 }
1057
1058
1059 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1060 u32 norm_fa,
1061 u32 rx_enable_time)
1062 {
1063 u32 val;
1064 u32 false_alarms = norm_fa * 200 * 1024;
1065 u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1066 u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1067 struct iwl4965_sensitivity_data *data = NULL;
1068
1069 data = &(priv->sensitivity_data);
1070
1071 /* If we got too many false alarms this time, reduce sensitivity */
1072 if (false_alarms > max_false_alarms) {
1073
1074 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1075 false_alarms, max_false_alarms);
1076
1077 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1078 data->auto_corr_ofdm =
1079 min((u32)AUTO_CORR_MAX_OFDM, val);
1080
1081 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1082 data->auto_corr_ofdm_mrc =
1083 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1084
1085 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1086 data->auto_corr_ofdm_x1 =
1087 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1088
1089 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1090 data->auto_corr_ofdm_mrc_x1 =
1091 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1092 }
1093
1094 /* Else if we got fewer than desired, increase sensitivity */
1095 else if (false_alarms < min_false_alarms) {
1096
1097 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1098 false_alarms, min_false_alarms);
1099
1100 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1101 data->auto_corr_ofdm =
1102 max((u32)AUTO_CORR_MIN_OFDM, val);
1103
1104 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1105 data->auto_corr_ofdm_mrc =
1106 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1107
1108 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1109 data->auto_corr_ofdm_x1 =
1110 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1111
1112 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1113 data->auto_corr_ofdm_mrc_x1 =
1114 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1115 }
1116
1117 else
1118 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1119 min_false_alarms, false_alarms, max_false_alarms);
1120
1121 return 0;
1122 }
1123
1124 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1125 struct iwl4965_cmd *cmd, struct sk_buff *skb)
1126 {
1127 /* We didn't cache the SKB; let the caller free it */
1128 return 1;
1129 }
1130
1131 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1132 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1133 {
1134 int rc = 0;
1135 struct iwl4965_sensitivity_cmd cmd ;
1136 struct iwl4965_sensitivity_data *data = NULL;
1137 struct iwl4965_host_cmd cmd_out = {
1138 .id = SENSITIVITY_CMD,
1139 .len = sizeof(struct iwl4965_sensitivity_cmd),
1140 .meta.flags = flags,
1141 .data = &cmd,
1142 };
1143
1144 data = &(priv->sensitivity_data);
1145
1146 memset(&cmd, 0, sizeof(cmd));
1147
1148 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1149 cpu_to_le16((u16)data->auto_corr_ofdm);
1150 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1151 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1152 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1153 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1154 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1155 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1156
1157 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1158 cpu_to_le16((u16)data->auto_corr_cck);
1159 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1160 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1161
1162 cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1163 cpu_to_le16((u16)data->nrg_th_cck);
1164 cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1165 cpu_to_le16((u16)data->nrg_th_ofdm);
1166
1167 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1168 __constant_cpu_to_le16(190);
1169 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1170 __constant_cpu_to_le16(390);
1171 cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1172 __constant_cpu_to_le16(62);
1173
1174 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1175 data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1176 data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1177 data->nrg_th_ofdm);
1178
1179 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1180 data->auto_corr_cck, data->auto_corr_cck_mrc,
1181 data->nrg_th_cck);
1182
1183 /* Update uCode's "work" table, and copy it to DSP */
1184 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1185
1186 if (flags & CMD_ASYNC)
1187 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1188
1189 /* Don't send command to uCode if nothing has changed */
1190 if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1191 sizeof(u16)*HD_TABLE_SIZE)) {
1192 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1193 return 0;
1194 }
1195
1196 /* Copy table for comparison next time */
1197 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1198 sizeof(u16)*HD_TABLE_SIZE);
1199
1200 rc = iwl4965_send_cmd(priv, &cmd_out);
1201 if (!rc) {
1202 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1203 return rc;
1204 }
1205
1206 return 0;
1207 }
1208
1209 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1210 {
1211 int rc = 0;
1212 int i;
1213 struct iwl4965_sensitivity_data *data = NULL;
1214
1215 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1216
1217 if (force)
1218 memset(&(priv->sensitivity_tbl[0]), 0,
1219 sizeof(u16)*HD_TABLE_SIZE);
1220
1221 /* Clear driver's sensitivity algo data */
1222 data = &(priv->sensitivity_data);
1223 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1224
1225 data->num_in_cck_no_fa = 0;
1226 data->nrg_curr_state = IWL_FA_TOO_MANY;
1227 data->nrg_prev_state = IWL_FA_TOO_MANY;
1228 data->nrg_silence_ref = 0;
1229 data->nrg_silence_idx = 0;
1230 data->nrg_energy_idx = 0;
1231
1232 for (i = 0; i < 10; i++)
1233 data->nrg_value[i] = 0;
1234
1235 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1236 data->nrg_silence_rssi[i] = 0;
1237
1238 data->auto_corr_ofdm = 90;
1239 data->auto_corr_ofdm_mrc = 170;
1240 data->auto_corr_ofdm_x1 = 105;
1241 data->auto_corr_ofdm_mrc_x1 = 220;
1242 data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1243 data->auto_corr_cck_mrc = 200;
1244 data->nrg_th_cck = 100;
1245 data->nrg_th_ofdm = 100;
1246
1247 data->last_bad_plcp_cnt_ofdm = 0;
1248 data->last_fa_cnt_ofdm = 0;
1249 data->last_bad_plcp_cnt_cck = 0;
1250 data->last_fa_cnt_cck = 0;
1251
1252 /* Clear prior Sensitivity command data to force send to uCode */
1253 if (force)
1254 memset(&(priv->sensitivity_tbl[0]), 0,
1255 sizeof(u16)*HD_TABLE_SIZE);
1256
1257 rc |= iwl4965_sensitivity_write(priv, flags);
1258 IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1259
1260 return;
1261 }
1262
1263
1264 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1265 * Called after every association, but this runs only once!
1266 * ... once chain noise is calibrated the first time, it's good forever. */
1267 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1268 {
1269 struct iwl4965_chain_noise_data *data = NULL;
1270 int rc = 0;
1271
1272 data = &(priv->chain_noise_data);
1273 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1274 struct iwl4965_calibration_cmd cmd;
1275
1276 memset(&cmd, 0, sizeof(cmd));
1277 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1278 cmd.diff_gain_a = 0;
1279 cmd.diff_gain_b = 0;
1280 cmd.diff_gain_c = 0;
1281 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1282 sizeof(cmd), &cmd);
1283 msleep(4);
1284 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1285 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1286 }
1287 return;
1288 }
1289
1290 /*
1291 * Accumulate 20 beacons of signal and noise statistics for each of
1292 * 3 receivers/antennas/rx-chains, then figure out:
1293 * 1) Which antennas are connected.
1294 * 2) Differential rx gain settings to balance the 3 receivers.
1295 */
1296 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1297 struct iwl4965_notif_statistics *stat_resp)
1298 {
1299 struct iwl4965_chain_noise_data *data = NULL;
1300 int rc = 0;
1301
1302 u32 chain_noise_a;
1303 u32 chain_noise_b;
1304 u32 chain_noise_c;
1305 u32 chain_sig_a;
1306 u32 chain_sig_b;
1307 u32 chain_sig_c;
1308 u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1309 u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1310 u32 max_average_sig;
1311 u16 max_average_sig_antenna_i;
1312 u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1313 u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1314 u16 i = 0;
1315 u16 chan_num = INITIALIZATION_VALUE;
1316 u32 band = INITIALIZATION_VALUE;
1317 u32 active_chains = 0;
1318 unsigned long flags;
1319 struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1320
1321 data = &(priv->chain_noise_data);
1322
1323 /* Accumulate just the first 20 beacons after the first association,
1324 * then we're done forever. */
1325 if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1326 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1327 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1328 return;
1329 }
1330
1331 spin_lock_irqsave(&priv->lock, flags);
1332 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1333 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1334 spin_unlock_irqrestore(&priv->lock, flags);
1335 return;
1336 }
1337
1338 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1339 chan_num = le16_to_cpu(priv->staging_rxon.channel);
1340
1341 /* Make sure we accumulate data for just the associated channel
1342 * (even if scanning). */
1343 if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1344 ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1345 (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1346 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1347 chan_num, band);
1348 spin_unlock_irqrestore(&priv->lock, flags);
1349 return;
1350 }
1351
1352 /* Accumulate beacon statistics values across 20 beacons */
1353 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1354 IN_BAND_FILTER;
1355 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1356 IN_BAND_FILTER;
1357 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1358 IN_BAND_FILTER;
1359
1360 chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1361 chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1362 chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1363
1364 spin_unlock_irqrestore(&priv->lock, flags);
1365
1366 data->beacon_count++;
1367
1368 data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1369 data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1370 data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1371
1372 data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1373 data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1374 data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1375
1376 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1377 data->beacon_count);
1378 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1379 chain_sig_a, chain_sig_b, chain_sig_c);
1380 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1381 chain_noise_a, chain_noise_b, chain_noise_c);
1382
1383 /* If this is the 20th beacon, determine:
1384 * 1) Disconnected antennas (using signal strengths)
1385 * 2) Differential gain (using silence noise) to balance receivers */
1386 if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1387
1388 /* Analyze signal for disconnected antenna */
1389 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1390 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1391 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1392
1393 if (average_sig[0] >= average_sig[1]) {
1394 max_average_sig = average_sig[0];
1395 max_average_sig_antenna_i = 0;
1396 active_chains = (1 << max_average_sig_antenna_i);
1397 } else {
1398 max_average_sig = average_sig[1];
1399 max_average_sig_antenna_i = 1;
1400 active_chains = (1 << max_average_sig_antenna_i);
1401 }
1402
1403 if (average_sig[2] >= max_average_sig) {
1404 max_average_sig = average_sig[2];
1405 max_average_sig_antenna_i = 2;
1406 active_chains = (1 << max_average_sig_antenna_i);
1407 }
1408
1409 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1410 average_sig[0], average_sig[1], average_sig[2]);
1411 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1412 max_average_sig, max_average_sig_antenna_i);
1413
1414 /* Compare signal strengths for all 3 receivers. */
1415 for (i = 0; i < NUM_RX_CHAINS; i++) {
1416 if (i != max_average_sig_antenna_i) {
1417 s32 rssi_delta = (max_average_sig -
1418 average_sig[i]);
1419
1420 /* If signal is very weak, compared with
1421 * strongest, mark it as disconnected. */
1422 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1423 data->disconn_array[i] = 1;
1424 else
1425 active_chains |= (1 << i);
1426 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1427 "disconn_array[i] = %d\n",
1428 i, rssi_delta, data->disconn_array[i]);
1429 }
1430 }
1431
1432 /*If both chains A & B are disconnected -
1433 * connect B and leave A as is */
1434 if (data->disconn_array[CHAIN_A] &&
1435 data->disconn_array[CHAIN_B]) {
1436 data->disconn_array[CHAIN_B] = 0;
1437 active_chains |= (1 << CHAIN_B);
1438 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1439 "W/A - declare B as connected\n");
1440 }
1441
1442 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1443 active_chains);
1444
1445 /* Save for use within RXON, TX, SCAN commands, etc. */
1446 priv->valid_antenna = active_chains;
1447
1448 /* Analyze noise for rx balance */
1449 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1450 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1451 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1452
1453 for (i = 0; i < NUM_RX_CHAINS; i++) {
1454 if (!(data->disconn_array[i]) &&
1455 (average_noise[i] <= min_average_noise)) {
1456 /* This means that chain i is active and has
1457 * lower noise values so far: */
1458 min_average_noise = average_noise[i];
1459 min_average_noise_antenna_i = i;
1460 }
1461 }
1462
1463 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1464
1465 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1466 average_noise[0], average_noise[1],
1467 average_noise[2]);
1468
1469 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1470 min_average_noise, min_average_noise_antenna_i);
1471
1472 for (i = 0; i < NUM_RX_CHAINS; i++) {
1473 s32 delta_g = 0;
1474
1475 if (!(data->disconn_array[i]) &&
1476 (data->delta_gain_code[i] ==
1477 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1478 delta_g = average_noise[i] - min_average_noise;
1479 data->delta_gain_code[i] = (u8)((delta_g *
1480 10) / 15);
1481 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1482 data->delta_gain_code[i])
1483 data->delta_gain_code[i] =
1484 CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1485
1486 data->delta_gain_code[i] =
1487 (data->delta_gain_code[i] | (1 << 2));
1488 } else
1489 data->delta_gain_code[i] = 0;
1490 }
1491 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1492 data->delta_gain_code[0],
1493 data->delta_gain_code[1],
1494 data->delta_gain_code[2]);
1495
1496 /* Differential gain gets sent to uCode only once */
1497 if (!data->radio_write) {
1498 struct iwl4965_calibration_cmd cmd;
1499 data->radio_write = 1;
1500
1501 memset(&cmd, 0, sizeof(cmd));
1502 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1503 cmd.diff_gain_a = data->delta_gain_code[0];
1504 cmd.diff_gain_b = data->delta_gain_code[1];
1505 cmd.diff_gain_c = data->delta_gain_code[2];
1506 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1507 sizeof(cmd), &cmd);
1508 if (rc)
1509 IWL_DEBUG_CALIB("fail sending cmd "
1510 "REPLY_PHY_CALIBRATION_CMD \n");
1511
1512 /* TODO we might want recalculate
1513 * rx_chain in rxon cmd */
1514
1515 /* Mark so we run this algo only once! */
1516 data->state = IWL_CHAIN_NOISE_CALIBRATED;
1517 }
1518 data->chain_noise_a = 0;
1519 data->chain_noise_b = 0;
1520 data->chain_noise_c = 0;
1521 data->chain_signal_a = 0;
1522 data->chain_signal_b = 0;
1523 data->chain_signal_c = 0;
1524 data->beacon_count = 0;
1525 }
1526 return;
1527 }
1528
1529 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1530 struct iwl4965_notif_statistics *resp)
1531 {
1532 int rc = 0;
1533 u32 rx_enable_time;
1534 u32 fa_cck;
1535 u32 fa_ofdm;
1536 u32 bad_plcp_cck;
1537 u32 bad_plcp_ofdm;
1538 u32 norm_fa_ofdm;
1539 u32 norm_fa_cck;
1540 struct iwl4965_sensitivity_data *data = NULL;
1541 struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1542 struct statistics_rx *statistics = &(resp->rx);
1543 unsigned long flags;
1544 struct statistics_general_data statis;
1545
1546 data = &(priv->sensitivity_data);
1547
1548 if (!iwl4965_is_associated(priv)) {
1549 IWL_DEBUG_CALIB("<< - not associated\n");
1550 return;
1551 }
1552
1553 spin_lock_irqsave(&priv->lock, flags);
1554 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1555 IWL_DEBUG_CALIB("<< invalid data.\n");
1556 spin_unlock_irqrestore(&priv->lock, flags);
1557 return;
1558 }
1559
1560 /* Extract Statistics: */
1561 rx_enable_time = le32_to_cpu(rx_info->channel_load);
1562 fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1563 fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1564 bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1565 bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1566
1567 statis.beacon_silence_rssi_a =
1568 le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1569 statis.beacon_silence_rssi_b =
1570 le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1571 statis.beacon_silence_rssi_c =
1572 le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1573 statis.beacon_energy_a =
1574 le32_to_cpu(statistics->general.beacon_energy_a);
1575 statis.beacon_energy_b =
1576 le32_to_cpu(statistics->general.beacon_energy_b);
1577 statis.beacon_energy_c =
1578 le32_to_cpu(statistics->general.beacon_energy_c);
1579
1580 spin_unlock_irqrestore(&priv->lock, flags);
1581
1582 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1583
1584 if (!rx_enable_time) {
1585 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1586 return;
1587 }
1588
1589 /* These statistics increase monotonically, and do not reset
1590 * at each beacon. Calculate difference from last value, or just
1591 * use the new statistics value if it has reset or wrapped around. */
1592 if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1593 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1594 else {
1595 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1596 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1597 }
1598
1599 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1600 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1601 else {
1602 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1603 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1604 }
1605
1606 if (data->last_fa_cnt_ofdm > fa_ofdm)
1607 data->last_fa_cnt_ofdm = fa_ofdm;
1608 else {
1609 fa_ofdm -= data->last_fa_cnt_ofdm;
1610 data->last_fa_cnt_ofdm += fa_ofdm;
1611 }
1612
1613 if (data->last_fa_cnt_cck > fa_cck)
1614 data->last_fa_cnt_cck = fa_cck;
1615 else {
1616 fa_cck -= data->last_fa_cnt_cck;
1617 data->last_fa_cnt_cck += fa_cck;
1618 }
1619
1620 /* Total aborted signal locks */
1621 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1622 norm_fa_cck = fa_cck + bad_plcp_cck;
1623
1624 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
1625 bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1626
1627 iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1628 iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1629 rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1630
1631 return;
1632 }
1633
1634 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1635 {
1636 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1637 sensitivity_work);
1638
1639 mutex_lock(&priv->mutex);
1640
1641 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1642 test_bit(STATUS_SCANNING, &priv->status)) {
1643 mutex_unlock(&priv->mutex);
1644 return;
1645 }
1646
1647 if (priv->start_calib) {
1648 iwl4965_noise_calibration(priv, &priv->statistics);
1649
1650 if (priv->sensitivity_data.state ==
1651 IWL_SENS_CALIB_NEED_REINIT) {
1652 iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1653 priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1654 } else
1655 iwl4965_sensitivity_calibration(priv,
1656 &priv->statistics);
1657 }
1658
1659 mutex_unlock(&priv->mutex);
1660 return;
1661 }
1662 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1663
1664 static void iwl4965_bg_txpower_work(struct work_struct *work)
1665 {
1666 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1667 txpower_work);
1668
1669 /* If a scan happened to start before we got here
1670 * then just return; the statistics notification will
1671 * kick off another scheduled work to compensate for
1672 * any temperature delta we missed here. */
1673 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1674 test_bit(STATUS_SCANNING, &priv->status))
1675 return;
1676
1677 mutex_lock(&priv->mutex);
1678
1679 /* Regardless of if we are assocaited, we must reconfigure the
1680 * TX power since frames can be sent on non-radar channels while
1681 * not associated */
1682 iwl4965_hw_reg_send_txpower(priv);
1683
1684 /* Update last_temperature to keep is_calib_needed from running
1685 * when it isn't needed... */
1686 priv->last_temperature = priv->temperature;
1687
1688 mutex_unlock(&priv->mutex);
1689 }
1690
1691 /*
1692 * Acquire priv->lock before calling this function !
1693 */
1694 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1695 {
1696 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1697 (index & 0xff) | (txq_id << 8));
1698 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1699 }
1700
1701 /**
1702 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1703 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1704 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1705 *
1706 * NOTE: Acquire priv->lock before calling this function !
1707 */
1708 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1709 struct iwl4965_tx_queue *txq,
1710 int tx_fifo_id, int scd_retry)
1711 {
1712 int txq_id = txq->q.id;
1713
1714 /* Find out whether to activate Tx queue */
1715 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1716
1717 /* Set up and activate */
1718 iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1719 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1720 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1721 (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1722 (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1723 SCD_QUEUE_STTS_REG_MSK);
1724
1725 txq->sched_retry = scd_retry;
1726
1727 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1728 active ? "Activate" : "Deactivate",
1729 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1730 }
1731
1732 static const u16 default_queue_to_tx_fifo[] = {
1733 IWL_TX_FIFO_AC3,
1734 IWL_TX_FIFO_AC2,
1735 IWL_TX_FIFO_AC1,
1736 IWL_TX_FIFO_AC0,
1737 IWL_CMD_FIFO_NUM,
1738 IWL_TX_FIFO_HCCA_1,
1739 IWL_TX_FIFO_HCCA_2
1740 };
1741
1742 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1743 {
1744 set_bit(txq_id, &priv->txq_ctx_active_msk);
1745 }
1746
1747 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1748 {
1749 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1750 }
1751
1752 int iwl4965_alive_notify(struct iwl_priv *priv)
1753 {
1754 u32 a;
1755 int i = 0;
1756 unsigned long flags;
1757 int rc;
1758
1759 spin_lock_irqsave(&priv->lock, flags);
1760
1761 #ifdef CONFIG_IWL4965_SENSITIVITY
1762 memset(&(priv->sensitivity_data), 0,
1763 sizeof(struct iwl4965_sensitivity_data));
1764 memset(&(priv->chain_noise_data), 0,
1765 sizeof(struct iwl4965_chain_noise_data));
1766 for (i = 0; i < NUM_RX_CHAINS; i++)
1767 priv->chain_noise_data.delta_gain_code[i] =
1768 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1769 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1770 rc = iwl4965_grab_nic_access(priv);
1771 if (rc) {
1772 spin_unlock_irqrestore(&priv->lock, flags);
1773 return rc;
1774 }
1775
1776 /* Clear 4965's internal Tx Scheduler data base */
1777 priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1778 a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1779 for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1780 iwl4965_write_targ_mem(priv, a, 0);
1781 for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1782 iwl4965_write_targ_mem(priv, a, 0);
1783 for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1784 iwl4965_write_targ_mem(priv, a, 0);
1785
1786 /* Tel 4965 where to find Tx byte count tables */
1787 iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1788 (priv->hw_setting.shared_phys +
1789 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1790
1791 /* Disable chain mode for all queues */
1792 iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1793
1794 /* Initialize each Tx queue (including the command queue) */
1795 for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1796
1797 /* TFD circular buffer read/write indexes */
1798 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1799 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1800
1801 /* Max Tx Window size for Scheduler-ACK mode */
1802 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1803 SCD_CONTEXT_QUEUE_OFFSET(i),
1804 (SCD_WIN_SIZE <<
1805 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1806 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1807
1808 /* Frame limit */
1809 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1810 SCD_CONTEXT_QUEUE_OFFSET(i) +
1811 sizeof(u32),
1812 (SCD_FRAME_LIMIT <<
1813 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1814 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1815
1816 }
1817 iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1818 (1 << priv->hw_setting.max_txq_num) - 1);
1819
1820 /* Activate all Tx DMA/FIFO channels */
1821 iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1822 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1823
1824 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1825
1826 /* Map each Tx/cmd queue to its corresponding fifo */
1827 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1828 int ac = default_queue_to_tx_fifo[i];
1829 iwl4965_txq_ctx_activate(priv, i);
1830 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1831 }
1832
1833 iwl4965_release_nic_access(priv);
1834 spin_unlock_irqrestore(&priv->lock, flags);
1835
1836 return 0;
1837 }
1838
1839 /**
1840 * iwl4965_hw_set_hw_setting
1841 *
1842 * Called when initializing driver
1843 */
1844 int iwl4965_hw_set_hw_setting(struct iwl_priv *priv)
1845 {
1846 int ret = 0;
1847
1848 if ((iwl4965_mod_params.num_of_queues > IWL_MAX_NUM_QUEUES) ||
1849 (iwl4965_mod_params.num_of_queues < IWL_MIN_NUM_QUEUES)) {
1850 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1851 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
1852 ret = -EINVAL;
1853 goto out;
1854 }
1855
1856 /* Allocate area for Tx byte count tables and Rx queue status */
1857 priv->hw_setting.shared_virt =
1858 pci_alloc_consistent(priv->pci_dev,
1859 sizeof(struct iwl4965_shared),
1860 &priv->hw_setting.shared_phys);
1861
1862 if (!priv->hw_setting.shared_virt) {
1863 ret = -ENOMEM;
1864 goto out;
1865 }
1866
1867 memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1868
1869 priv->hw_setting.max_txq_num = iwl4965_mod_params.num_of_queues;
1870 priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1871 priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1872 priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1873 if (iwl4965_mod_params.amsdu_size_8K)
1874 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1875 else
1876 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1877 priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1878 priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1879 priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1880
1881 priv->hw_setting.tx_ant_num = 2;
1882
1883 out:
1884 return ret;
1885 }
1886
1887 /**
1888 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1889 *
1890 * Destroy all TX DMA queues and structures
1891 */
1892 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
1893 {
1894 int txq_id;
1895
1896 /* Tx queues */
1897 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1898 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1899
1900 /* Keep-warm buffer */
1901 iwl4965_kw_free(priv);
1902 }
1903
1904 /**
1905 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1906 *
1907 * Does NOT advance any TFD circular buffer read/write indexes
1908 * Does NOT free the TFD itself (which is within circular buffer)
1909 */
1910 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
1911 {
1912 struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1913 struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1914 struct pci_dev *dev = priv->pci_dev;
1915 int i;
1916 int counter = 0;
1917 int index, is_odd;
1918
1919 /* Host command buffers stay mapped in memory, nothing to clean */
1920 if (txq->q.id == IWL_CMD_QUEUE_NUM)
1921 return 0;
1922
1923 /* Sanity check on number of chunks */
1924 counter = IWL_GET_BITS(*bd, num_tbs);
1925 if (counter > MAX_NUM_OF_TBS) {
1926 IWL_ERROR("Too many chunks: %i\n", counter);
1927 /* @todo issue fatal error, it is quite serious situation */
1928 return 0;
1929 }
1930
1931 /* Unmap chunks, if any.
1932 * TFD info for odd chunks is different format than for even chunks. */
1933 for (i = 0; i < counter; i++) {
1934 index = i / 2;
1935 is_odd = i & 0x1;
1936
1937 if (is_odd)
1938 pci_unmap_single(
1939 dev,
1940 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1941 (IWL_GET_BITS(bd->pa[index],
1942 tb2_addr_hi20) << 16),
1943 IWL_GET_BITS(bd->pa[index], tb2_len),
1944 PCI_DMA_TODEVICE);
1945
1946 else if (i > 0)
1947 pci_unmap_single(dev,
1948 le32_to_cpu(bd->pa[index].tb1_addr),
1949 IWL_GET_BITS(bd->pa[index], tb1_len),
1950 PCI_DMA_TODEVICE);
1951
1952 /* Free SKB, if any, for this chunk */
1953 if (txq->txb[txq->q.read_ptr].skb[i]) {
1954 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1955
1956 dev_kfree_skb(skb);
1957 txq->txb[txq->q.read_ptr].skb[i] = NULL;
1958 }
1959 }
1960 return 0;
1961 }
1962
1963 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1964 {
1965 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1966 return -EINVAL;
1967 }
1968
1969 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1970 {
1971 s32 sign = 1;
1972
1973 if (num < 0) {
1974 sign = -sign;
1975 num = -num;
1976 }
1977 if (denom < 0) {
1978 sign = -sign;
1979 denom = -denom;
1980 }
1981 *res = 1;
1982 *res = ((num * 2 + denom) / (denom * 2)) * sign;
1983
1984 return 1;
1985 }
1986
1987 /**
1988 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1989 *
1990 * Determines power supply voltage compensation for txpower calculations.
1991 * Returns number of 1/2-dB steps to subtract from gain table index,
1992 * to compensate for difference between power supply voltage during
1993 * factory measurements, vs. current power supply voltage.
1994 *
1995 * Voltage indication is higher for lower voltage.
1996 * Lower voltage requires more gain (lower gain table index).
1997 */
1998 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1999 s32 current_voltage)
2000 {
2001 s32 comp = 0;
2002
2003 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2004 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2005 return 0;
2006
2007 iwl4965_math_div_round(current_voltage - eeprom_voltage,
2008 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2009
2010 if (current_voltage > eeprom_voltage)
2011 comp *= 2;
2012 if ((comp < -2) || (comp > 2))
2013 comp = 0;
2014
2015 return comp;
2016 }
2017
2018 static const struct iwl4965_channel_info *
2019 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2020 enum ieee80211_band band, u16 channel)
2021 {
2022 const struct iwl4965_channel_info *ch_info;
2023
2024 ch_info = iwl4965_get_channel_info(priv, band, channel);
2025
2026 if (!is_channel_valid(ch_info))
2027 return NULL;
2028
2029 return ch_info;
2030 }
2031
2032 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2033 {
2034 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2035 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2036 return CALIB_CH_GROUP_5;
2037
2038 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2039 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2040 return CALIB_CH_GROUP_1;
2041
2042 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2043 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2044 return CALIB_CH_GROUP_2;
2045
2046 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2047 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2048 return CALIB_CH_GROUP_3;
2049
2050 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2051 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2052 return CALIB_CH_GROUP_4;
2053
2054 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2055 return -1;
2056 }
2057
2058 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2059 {
2060 s32 b = -1;
2061
2062 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2063 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2064 continue;
2065
2066 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2067 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2068 break;
2069 }
2070
2071 return b;
2072 }
2073
2074 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2075 {
2076 s32 val;
2077
2078 if (x2 == x1)
2079 return y1;
2080 else {
2081 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2082 return val + y2;
2083 }
2084 }
2085
2086 /**
2087 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2088 *
2089 * Interpolates factory measurements from the two sample channels within a
2090 * sub-band, to apply to channel of interest. Interpolation is proportional to
2091 * differences in channel frequencies, which is proportional to differences
2092 * in channel number.
2093 */
2094 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2095 struct iwl4965_eeprom_calib_ch_info *chan_info)
2096 {
2097 s32 s = -1;
2098 u32 c;
2099 u32 m;
2100 const struct iwl4965_eeprom_calib_measure *m1;
2101 const struct iwl4965_eeprom_calib_measure *m2;
2102 struct iwl4965_eeprom_calib_measure *omeas;
2103 u32 ch_i1;
2104 u32 ch_i2;
2105
2106 s = iwl4965_get_sub_band(priv, channel);
2107 if (s >= EEPROM_TX_POWER_BANDS) {
2108 IWL_ERROR("Tx Power can not find channel %d ", channel);
2109 return -1;
2110 }
2111
2112 ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2113 ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2114 chan_info->ch_num = (u8) channel;
2115
2116 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2117 channel, s, ch_i1, ch_i2);
2118
2119 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2120 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2121 m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2122 measurements[c][m]);
2123 m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2124 measurements[c][m]);
2125 omeas = &(chan_info->measurements[c][m]);
2126
2127 omeas->actual_pow =
2128 (u8) iwl4965_interpolate_value(channel, ch_i1,
2129 m1->actual_pow,
2130 ch_i2,
2131 m2->actual_pow);
2132 omeas->gain_idx =
2133 (u8) iwl4965_interpolate_value(channel, ch_i1,
2134 m1->gain_idx, ch_i2,
2135 m2->gain_idx);
2136 omeas->temperature =
2137 (u8) iwl4965_interpolate_value(channel, ch_i1,
2138 m1->temperature,
2139 ch_i2,
2140 m2->temperature);
2141 omeas->pa_det =
2142 (s8) iwl4965_interpolate_value(channel, ch_i1,
2143 m1->pa_det, ch_i2,
2144 m2->pa_det);
2145
2146 IWL_DEBUG_TXPOWER
2147 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2148 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2149 IWL_DEBUG_TXPOWER
2150 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2151 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2152 IWL_DEBUG_TXPOWER
2153 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2154 m1->pa_det, m2->pa_det, omeas->pa_det);
2155 IWL_DEBUG_TXPOWER
2156 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2157 m1->temperature, m2->temperature,
2158 omeas->temperature);
2159 }
2160 }
2161
2162 return 0;
2163 }
2164
2165 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2166 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2167 static s32 back_off_table[] = {
2168 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2169 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2170 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2171 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2172 10 /* CCK */
2173 };
2174
2175 /* Thermal compensation values for txpower for various frequency ranges ...
2176 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2177 static struct iwl4965_txpower_comp_entry {
2178 s32 degrees_per_05db_a;
2179 s32 degrees_per_05db_a_denom;
2180 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2181 {9, 2}, /* group 0 5.2, ch 34-43 */
2182 {4, 1}, /* group 1 5.2, ch 44-70 */
2183 {4, 1}, /* group 2 5.2, ch 71-124 */
2184 {4, 1}, /* group 3 5.2, ch 125-200 */
2185 {3, 1} /* group 4 2.4, ch all */
2186 };
2187
2188 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2189 {
2190 if (!band) {
2191 if ((rate_power_index & 7) <= 4)
2192 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2193 }
2194 return MIN_TX_GAIN_INDEX;
2195 }
2196
2197 struct gain_entry {
2198 u8 dsp;
2199 u8 radio;
2200 };
2201
2202 static const struct gain_entry gain_table[2][108] = {
2203 /* 5.2GHz power gain index table */
2204 {
2205 {123, 0x3F}, /* highest txpower */
2206 {117, 0x3F},
2207 {110, 0x3F},
2208 {104, 0x3F},
2209 {98, 0x3F},
2210 {110, 0x3E},
2211 {104, 0x3E},
2212 {98, 0x3E},
2213 {110, 0x3D},
2214 {104, 0x3D},
2215 {98, 0x3D},
2216 {110, 0x3C},
2217 {104, 0x3C},
2218 {98, 0x3C},
2219 {110, 0x3B},
2220 {104, 0x3B},
2221 {98, 0x3B},
2222 {110, 0x3A},
2223 {104, 0x3A},
2224 {98, 0x3A},
2225 {110, 0x39},
2226 {104, 0x39},
2227 {98, 0x39},
2228 {110, 0x38},
2229 {104, 0x38},
2230 {98, 0x38},
2231 {110, 0x37},
2232 {104, 0x37},
2233 {98, 0x37},
2234 {110, 0x36},
2235 {104, 0x36},
2236 {98, 0x36},
2237 {110, 0x35},
2238 {104, 0x35},
2239 {98, 0x35},
2240 {110, 0x34},
2241 {104, 0x34},
2242 {98, 0x34},
2243 {110, 0x33},
2244 {104, 0x33},
2245 {98, 0x33},
2246 {110, 0x32},
2247 {104, 0x32},
2248 {98, 0x32},
2249 {110, 0x31},
2250 {104, 0x31},
2251 {98, 0x31},
2252 {110, 0x30},
2253 {104, 0x30},
2254 {98, 0x30},
2255 {110, 0x25},
2256 {104, 0x25},
2257 {98, 0x25},
2258 {110, 0x24},
2259 {104, 0x24},
2260 {98, 0x24},
2261 {110, 0x23},
2262 {104, 0x23},
2263 {98, 0x23},
2264 {110, 0x22},
2265 {104, 0x18},
2266 {98, 0x18},
2267 {110, 0x17},
2268 {104, 0x17},
2269 {98, 0x17},
2270 {110, 0x16},
2271 {104, 0x16},
2272 {98, 0x16},
2273 {110, 0x15},
2274 {104, 0x15},
2275 {98, 0x15},
2276 {110, 0x14},
2277 {104, 0x14},
2278 {98, 0x14},
2279 {110, 0x13},
2280 {104, 0x13},
2281 {98, 0x13},
2282 {110, 0x12},
2283 {104, 0x08},
2284 {98, 0x08},
2285 {110, 0x07},
2286 {104, 0x07},
2287 {98, 0x07},
2288 {110, 0x06},
2289 {104, 0x06},
2290 {98, 0x06},
2291 {110, 0x05},
2292 {104, 0x05},
2293 {98, 0x05},
2294 {110, 0x04},
2295 {104, 0x04},
2296 {98, 0x04},
2297 {110, 0x03},
2298 {104, 0x03},
2299 {98, 0x03},
2300 {110, 0x02},
2301 {104, 0x02},
2302 {98, 0x02},
2303 {110, 0x01},
2304 {104, 0x01},
2305 {98, 0x01},
2306 {110, 0x00},
2307 {104, 0x00},
2308 {98, 0x00},
2309 {93, 0x00},
2310 {88, 0x00},
2311 {83, 0x00},
2312 {78, 0x00},
2313 },
2314 /* 2.4GHz power gain index table */
2315 {
2316 {110, 0x3f}, /* highest txpower */
2317 {104, 0x3f},
2318 {98, 0x3f},
2319 {110, 0x3e},
2320 {104, 0x3e},
2321 {98, 0x3e},
2322 {110, 0x3d},
2323 {104, 0x3d},
2324 {98, 0x3d},
2325 {110, 0x3c},
2326 {104, 0x3c},
2327 {98, 0x3c},
2328 {110, 0x3b},
2329 {104, 0x3b},
2330 {98, 0x3b},
2331 {110, 0x3a},
2332 {104, 0x3a},
2333 {98, 0x3a},
2334 {110, 0x39},
2335 {104, 0x39},
2336 {98, 0x39},
2337 {110, 0x38},
2338 {104, 0x38},
2339 {98, 0x38},
2340 {110, 0x37},
2341 {104, 0x37},
2342 {98, 0x37},
2343 {110, 0x36},
2344 {104, 0x36},
2345 {98, 0x36},
2346 {110, 0x35},
2347 {104, 0x35},
2348 {98, 0x35},
2349 {110, 0x34},
2350 {104, 0x34},
2351 {98, 0x34},
2352 {110, 0x33},
2353 {104, 0x33},
2354 {98, 0x33},
2355 {110, 0x32},
2356 {104, 0x32},
2357 {98, 0x32},
2358 {110, 0x31},
2359 {104, 0x31},
2360 {98, 0x31},
2361 {110, 0x30},
2362 {104, 0x30},
2363 {98, 0x30},
2364 {110, 0x6},
2365 {104, 0x6},
2366 {98, 0x6},
2367 {110, 0x5},
2368 {104, 0x5},
2369 {98, 0x5},
2370 {110, 0x4},
2371 {104, 0x4},
2372 {98, 0x4},
2373 {110, 0x3},
2374 {104, 0x3},
2375 {98, 0x3},
2376 {110, 0x2},
2377 {104, 0x2},
2378 {98, 0x2},
2379 {110, 0x1},
2380 {104, 0x1},
2381 {98, 0x1},
2382 {110, 0x0},
2383 {104, 0x0},
2384 {98, 0x0},
2385 {97, 0},
2386 {96, 0},
2387 {95, 0},
2388 {94, 0},
2389 {93, 0},
2390 {92, 0},
2391 {91, 0},
2392 {90, 0},
2393 {89, 0},
2394 {88, 0},
2395 {87, 0},
2396 {86, 0},
2397 {85, 0},
2398 {84, 0},
2399 {83, 0},
2400 {82, 0},
2401 {81, 0},
2402 {80, 0},
2403 {79, 0},
2404 {78, 0},
2405 {77, 0},
2406 {76, 0},
2407 {75, 0},
2408 {74, 0},
2409 {73, 0},
2410 {72, 0},
2411 {71, 0},
2412 {70, 0},
2413 {69, 0},
2414 {68, 0},
2415 {67, 0},
2416 {66, 0},
2417 {65, 0},
2418 {64, 0},
2419 {63, 0},
2420 {62, 0},
2421 {61, 0},
2422 {60, 0},
2423 {59, 0},
2424 }
2425 };
2426
2427 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2428 u8 is_fat, u8 ctrl_chan_high,
2429 struct iwl4965_tx_power_db *tx_power_tbl)
2430 {
2431 u8 saturation_power;
2432 s32 target_power;
2433 s32 user_target_power;
2434 s32 power_limit;
2435 s32 current_temp;
2436 s32 reg_limit;
2437 s32 current_regulatory;
2438 s32 txatten_grp = CALIB_CH_GROUP_MAX;
2439 int i;
2440 int c;
2441 const struct iwl4965_channel_info *ch_info = NULL;
2442 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2443 const struct iwl4965_eeprom_calib_measure *measurement;
2444 s16 voltage;
2445 s32 init_voltage;
2446 s32 voltage_compensation;
2447 s32 degrees_per_05db_num;
2448 s32 degrees_per_05db_denom;
2449 s32 factory_temp;
2450 s32 temperature_comp[2];
2451 s32 factory_gain_index[2];
2452 s32 factory_actual_pwr[2];
2453 s32 power_index;
2454
2455 /* Sanity check requested level (dBm) */
2456 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2457 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2458 priv->user_txpower_limit);
2459 return -EINVAL;
2460 }
2461 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2462 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2463 priv->user_txpower_limit);
2464 return -EINVAL;
2465 }
2466
2467 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2468 * are used for indexing into txpower table) */
2469 user_target_power = 2 * priv->user_txpower_limit;
2470
2471 /* Get current (RXON) channel, band, width */
2472 ch_info =
2473 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2474
2475 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2476 is_fat);
2477
2478 if (!ch_info)
2479 return -EINVAL;
2480
2481 /* get txatten group, used to select 1) thermal txpower adjustment
2482 * and 2) mimo txpower balance between Tx chains. */
2483 txatten_grp = iwl4965_get_tx_atten_grp(channel);
2484 if (txatten_grp < 0)
2485 return -EINVAL;
2486
2487 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2488 channel, txatten_grp);
2489
2490 if (is_fat) {
2491 if (ctrl_chan_high)
2492 channel -= 2;
2493 else
2494 channel += 2;
2495 }
2496
2497 /* hardware txpower limits ...
2498 * saturation (clipping distortion) txpowers are in half-dBm */
2499 if (band)
2500 saturation_power = priv->eeprom.calib_info.saturation_power24;
2501 else
2502 saturation_power = priv->eeprom.calib_info.saturation_power52;
2503
2504 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2505 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2506 if (band)
2507 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2508 else
2509 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2510 }
2511
2512 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2513 * max_power_avg values are in dBm, convert * 2 */
2514 if (is_fat)
2515 reg_limit = ch_info->fat_max_power_avg * 2;
2516 else
2517 reg_limit = ch_info->max_power_avg * 2;
2518
2519 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2520 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2521 if (band)
2522 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2523 else
2524 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2525 }
2526
2527 /* Interpolate txpower calibration values for this channel,
2528 * based on factory calibration tests on spaced channels. */
2529 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2530
2531 /* calculate tx gain adjustment based on power supply voltage */
2532 voltage = priv->eeprom.calib_info.voltage;
2533 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2534 voltage_compensation =
2535 iwl4965_get_voltage_compensation(voltage, init_voltage);
2536
2537 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2538 init_voltage,
2539 voltage, voltage_compensation);
2540
2541 /* get current temperature (Celsius) */
2542 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2543 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2544 current_temp = KELVIN_TO_CELSIUS(current_temp);
2545
2546 /* select thermal txpower adjustment params, based on channel group
2547 * (same frequency group used for mimo txatten adjustment) */
2548 degrees_per_05db_num =
2549 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2550 degrees_per_05db_denom =
2551 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2552
2553 /* get per-chain txpower values from factory measurements */
2554 for (c = 0; c < 2; c++) {
2555 measurement = &ch_eeprom_info.measurements[c][1];
2556
2557 /* txgain adjustment (in half-dB steps) based on difference
2558 * between factory and current temperature */
2559 factory_temp = measurement->temperature;
2560 iwl4965_math_div_round((current_temp - factory_temp) *
2561 degrees_per_05db_denom,
2562 degrees_per_05db_num,
2563 &temperature_comp[c]);
2564
2565 factory_gain_index[c] = measurement->gain_idx;
2566 factory_actual_pwr[c] = measurement->actual_pow;
2567
2568 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2569 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2570 "curr tmp %d, comp %d steps\n",
2571 factory_temp, current_temp,
2572 temperature_comp[c]);
2573
2574 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2575 factory_gain_index[c],
2576 factory_actual_pwr[c]);
2577 }
2578
2579 /* for each of 33 bit-rates (including 1 for CCK) */
2580 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2581 u8 is_mimo_rate;
2582 union iwl4965_tx_power_dual_stream tx_power;
2583
2584 /* for mimo, reduce each chain's txpower by half
2585 * (3dB, 6 steps), so total output power is regulatory
2586 * compliant. */
2587 if (i & 0x8) {
2588 current_regulatory = reg_limit -
2589 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2590 is_mimo_rate = 1;
2591 } else {
2592 current_regulatory = reg_limit;
2593 is_mimo_rate = 0;
2594 }
2595
2596 /* find txpower limit, either hardware or regulatory */
2597 power_limit = saturation_power - back_off_table[i];
2598 if (power_limit > current_regulatory)
2599 power_limit = current_regulatory;
2600
2601 /* reduce user's txpower request if necessary
2602 * for this rate on this channel */
2603 target_power = user_target_power;
2604 if (target_power > power_limit)
2605 target_power = power_limit;
2606
2607 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2608 i, saturation_power - back_off_table[i],
2609 current_regulatory, user_target_power,
2610 target_power);
2611
2612 /* for each of 2 Tx chains (radio transmitters) */
2613 for (c = 0; c < 2; c++) {
2614 s32 atten_value;
2615
2616 if (is_mimo_rate)
2617 atten_value =
2618 (s32)le32_to_cpu(priv->card_alive_init.
2619 tx_atten[txatten_grp][c]);
2620 else
2621 atten_value = 0;
2622
2623 /* calculate index; higher index means lower txpower */
2624 power_index = (u8) (factory_gain_index[c] -
2625 (target_power -
2626 factory_actual_pwr[c]) -
2627 temperature_comp[c] -
2628 voltage_compensation +
2629 atten_value);
2630
2631 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2632 power_index); */
2633
2634 if (power_index < get_min_power_index(i, band))
2635 power_index = get_min_power_index(i, band);
2636
2637 /* adjust 5 GHz index to support negative indexes */
2638 if (!band)
2639 power_index += 9;
2640
2641 /* CCK, rate 32, reduce txpower for CCK */
2642 if (i == POWER_TABLE_CCK_ENTRY)
2643 power_index +=
2644 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2645
2646 /* stay within the table! */
2647 if (power_index > 107) {
2648 IWL_WARNING("txpower index %d > 107\n",
2649 power_index);
2650 power_index = 107;
2651 }
2652 if (power_index < 0) {
2653 IWL_WARNING("txpower index %d < 0\n",
2654 power_index);
2655 power_index = 0;
2656 }
2657
2658 /* fill txpower command for this rate/chain */
2659 tx_power.s.radio_tx_gain[c] =
2660 gain_table[band][power_index].radio;
2661 tx_power.s.dsp_predis_atten[c] =
2662 gain_table[band][power_index].dsp;
2663
2664 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2665 "gain 0x%02x dsp %d\n",
2666 c, atten_value, power_index,
2667 tx_power.s.radio_tx_gain[c],
2668 tx_power.s.dsp_predis_atten[c]);
2669 }/* for each chain */
2670
2671 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2672
2673 }/* for each rate */
2674
2675 return 0;
2676 }
2677
2678 /**
2679 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2680 *
2681 * Uses the active RXON for channel, band, and characteristics (fat, high)
2682 * The power limit is taken from priv->user_txpower_limit.
2683 */
2684 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2685 {
2686 struct iwl4965_txpowertable_cmd cmd = { 0 };
2687 int rc = 0;
2688 u8 band = 0;
2689 u8 is_fat = 0;
2690 u8 ctrl_chan_high = 0;
2691
2692 if (test_bit(STATUS_SCANNING, &priv->status)) {
2693 /* If this gets hit a lot, switch it to a BUG() and catch
2694 * the stack trace to find out who is calling this during
2695 * a scan. */
2696 IWL_WARNING("TX Power requested while scanning!\n");
2697 return -EAGAIN;
2698 }
2699
2700 band = priv->band == IEEE80211_BAND_2GHZ;
2701
2702 is_fat = is_fat_channel(priv->active_rxon.flags);
2703
2704 if (is_fat &&
2705 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2706 ctrl_chan_high = 1;
2707
2708 cmd.band = band;
2709 cmd.channel = priv->active_rxon.channel;
2710
2711 rc = iwl4965_fill_txpower_tbl(priv, band,
2712 le16_to_cpu(priv->active_rxon.channel),
2713 is_fat, ctrl_chan_high, &cmd.tx_power);
2714 if (rc)
2715 return rc;
2716
2717 rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2718 return rc;
2719 }
2720
2721 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2722 {
2723 int rc;
2724 u8 band = 0;
2725 u8 is_fat = 0;
2726 u8 ctrl_chan_high = 0;
2727 struct iwl4965_channel_switch_cmd cmd = { 0 };
2728 const struct iwl4965_channel_info *ch_info;
2729
2730 band = priv->band == IEEE80211_BAND_2GHZ;
2731
2732 ch_info = iwl4965_get_channel_info(priv, priv->band, channel);
2733
2734 is_fat = is_fat_channel(priv->staging_rxon.flags);
2735
2736 if (is_fat &&
2737 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2738 ctrl_chan_high = 1;
2739
2740 cmd.band = band;
2741 cmd.expect_beacon = 0;
2742 cmd.channel = cpu_to_le16(channel);
2743 cmd.rxon_flags = priv->active_rxon.flags;
2744 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2745 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2746 if (ch_info)
2747 cmd.expect_beacon = is_channel_radar(ch_info);
2748 else
2749 cmd.expect_beacon = 1;
2750
2751 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2752 ctrl_chan_high, &cmd.tx_power);
2753 if (rc) {
2754 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2755 return rc;
2756 }
2757
2758 rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2759 return rc;
2760 }
2761
2762 #define RTS_HCCA_RETRY_LIMIT 3
2763 #define RTS_DFAULT_RETRY_LIMIT 60
2764
2765 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2766 struct iwl4965_cmd *cmd,
2767 struct ieee80211_tx_control *ctrl,
2768 struct ieee80211_hdr *hdr, int sta_id,
2769 int is_hcca)
2770 {
2771 struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2772 u8 rts_retry_limit = 0;
2773 u8 data_retry_limit = 0;
2774 u16 fc = le16_to_cpu(hdr->frame_control);
2775 u8 rate_plcp;
2776 u16 rate_flags = 0;
2777 int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2778
2779 rate_plcp = iwl4965_rates[rate_idx].plcp;
2780
2781 rts_retry_limit = (is_hcca) ?
2782 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2783
2784 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2785 rate_flags |= RATE_MCS_CCK_MSK;
2786
2787
2788 if (ieee80211_is_probe_response(fc)) {
2789 data_retry_limit = 3;
2790 if (data_retry_limit < rts_retry_limit)
2791 rts_retry_limit = data_retry_limit;
2792 } else
2793 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2794
2795 if (priv->data_retry_limit != -1)
2796 data_retry_limit = priv->data_retry_limit;
2797
2798
2799 if (ieee80211_is_data(fc)) {
2800 tx->initial_rate_index = 0;
2801 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2802 } else {
2803 switch (fc & IEEE80211_FCTL_STYPE) {
2804 case IEEE80211_STYPE_AUTH:
2805 case IEEE80211_STYPE_DEAUTH:
2806 case IEEE80211_STYPE_ASSOC_REQ:
2807 case IEEE80211_STYPE_REASSOC_REQ:
2808 if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2809 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2810 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2811 }
2812 break;
2813 default:
2814 break;
2815 }
2816
2817 /* Alternate between antenna A and B for successive frames */
2818 if (priv->use_ant_b_for_management_frame) {
2819 priv->use_ant_b_for_management_frame = 0;
2820 rate_flags |= RATE_MCS_ANT_B_MSK;
2821 } else {
2822 priv->use_ant_b_for_management_frame = 1;
2823 rate_flags |= RATE_MCS_ANT_A_MSK;
2824 }
2825 }
2826
2827 tx->rts_retry_limit = rts_retry_limit;
2828 tx->data_retry_limit = data_retry_limit;
2829 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2830 }
2831
2832 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
2833 {
2834 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2835
2836 return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2837 }
2838
2839 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
2840 {
2841 return priv->temperature;
2842 }
2843
2844 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
2845 struct iwl4965_frame *frame, u8 rate)
2846 {
2847 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2848 unsigned int frame_size;
2849
2850 tx_beacon_cmd = &frame->u.beacon;
2851 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2852
2853 tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2854 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2855
2856 frame_size = iwl4965_fill_beacon_frame(priv,
2857 tx_beacon_cmd->frame,
2858 iwl4965_broadcast_addr,
2859 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2860
2861 BUG_ON(frame_size > MAX_MPDU_SIZE);
2862 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2863
2864 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2865 tx_beacon_cmd->tx.rate_n_flags =
2866 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2867 else
2868 tx_beacon_cmd->tx.rate_n_flags =
2869 iwl4965_hw_set_rate_n_flags(rate, 0);
2870
2871 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2872 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2873 return (sizeof(*tx_beacon_cmd) + frame_size);
2874 }
2875
2876 /*
2877 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2878 * given Tx queue, and enable the DMA channel used for that queue.
2879 *
2880 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2881 * channels supported in hardware.
2882 */
2883 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2884 {
2885 int rc;
2886 unsigned long flags;
2887 int txq_id = txq->q.id;
2888
2889 spin_lock_irqsave(&priv->lock, flags);
2890 rc = iwl4965_grab_nic_access(priv);
2891 if (rc) {
2892 spin_unlock_irqrestore(&priv->lock, flags);
2893 return rc;
2894 }
2895
2896 /* Circular buffer (TFD queue in DRAM) physical base address */
2897 iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2898 txq->q.dma_addr >> 8);
2899
2900 /* Enable DMA channel, using same id as for TFD queue */
2901 iwl4965_write_direct32(
2902 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2903 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2904 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2905 iwl4965_release_nic_access(priv);
2906 spin_unlock_irqrestore(&priv->lock, flags);
2907
2908 return 0;
2909 }
2910
2911 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2912 dma_addr_t addr, u16 len)
2913 {
2914 int index, is_odd;
2915 struct iwl4965_tfd_frame *tfd = ptr;
2916 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2917
2918 /* Each TFD can point to a maximum 20 Tx buffers */
2919 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2920 IWL_ERROR("Error can not send more than %d chunks\n",
2921 MAX_NUM_OF_TBS);
2922 return -EINVAL;
2923 }
2924
2925 index = num_tbs / 2;
2926 is_odd = num_tbs & 0x1;
2927
2928 if (!is_odd) {
2929 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2930 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2931 iwl_get_dma_hi_address(addr));
2932 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2933 } else {
2934 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2935 (u32) (addr & 0xffff));
2936 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2937 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2938 }
2939
2940 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2941
2942 return 0;
2943 }
2944
2945 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
2946 {
2947 u16 hw_version = priv->eeprom.board_revision_4965;
2948
2949 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2950 ((hw_version >> 8) & 0x0F),
2951 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2952
2953 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2954 priv->eeprom.board_pba_number_4965);
2955 }
2956
2957 #define IWL_TX_CRC_SIZE 4
2958 #define IWL_TX_DELIMITER_SIZE 4
2959
2960 /**
2961 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2962 */
2963 int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
2964 struct iwl4965_tx_queue *txq, u16 byte_cnt)
2965 {
2966 int len;
2967 int txq_id = txq->q.id;
2968 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2969
2970 if (txq->need_update == 0)
2971 return 0;
2972
2973 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2974
2975 /* Set up byte count within first 256 entries */
2976 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2977 tfd_offset[txq->q.write_ptr], byte_cnt, len);
2978
2979 /* If within first 64 entries, duplicate at end */
2980 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2981 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2982 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2983 byte_cnt, len);
2984
2985 return 0;
2986 }
2987
2988 /**
2989 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2990 *
2991 * Selects how many and which Rx receivers/antennas/chains to use.
2992 * This should not be used for scan command ... it puts data in wrong place.
2993 */
2994 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
2995 {
2996 u8 is_single = is_single_stream(priv);
2997 u8 idle_state, rx_state;
2998
2999 priv->staging_rxon.rx_chain = 0;
3000 rx_state = idle_state = 3;
3001
3002 /* Tell uCode which antennas are actually connected.
3003 * Before first association, we assume all antennas are connected.
3004 * Just after first association, iwl4965_noise_calibration()
3005 * checks which antennas actually *are* connected. */
3006 priv->staging_rxon.rx_chain |=
3007 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3008
3009 /* How many receivers should we use? */
3010 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3011 priv->staging_rxon.rx_chain |=
3012 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3013 priv->staging_rxon.rx_chain |=
3014 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3015
3016 if (!is_single && (rx_state >= 2) &&
3017 !test_bit(STATUS_POWER_PMI, &priv->status))
3018 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3019 else
3020 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3021
3022 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3023 }
3024
3025 /**
3026 * sign_extend - Sign extend a value using specified bit as sign-bit
3027 *
3028 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3029 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3030 *
3031 * @param oper value to sign extend
3032 * @param index 0 based bit index (0<=index<32) to sign bit
3033 */
3034 static s32 sign_extend(u32 oper, int index)
3035 {
3036 u8 shift = 31 - index;
3037
3038 return (s32)(oper << shift) >> shift;
3039 }
3040
3041 /**
3042 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3043 * @statistics: Provides the temperature reading from the uCode
3044 *
3045 * A return of <0 indicates bogus data in the statistics
3046 */
3047 int iwl4965_get_temperature(const struct iwl_priv *priv)
3048 {
3049 s32 temperature;
3050 s32 vt;
3051 s32 R1, R2, R3;
3052 u32 R4;
3053
3054 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3055 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3056 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3057 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3058 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3059 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3060 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3061 } else {
3062 IWL_DEBUG_TEMP("Running temperature calibration\n");
3063 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3064 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3065 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3066 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3067 }
3068
3069 /*
3070 * Temperature is only 23 bits, so sign extend out to 32.
3071 *
3072 * NOTE If we haven't received a statistics notification yet
3073 * with an updated temperature, use R4 provided to us in the
3074 * "initialize" ALIVE response.
3075 */
3076 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3077 vt = sign_extend(R4, 23);
3078 else
3079 vt = sign_extend(
3080 le32_to_cpu(priv->statistics.general.temperature), 23);
3081
3082 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3083 R1, R2, R3, vt);
3084
3085 if (R3 == R1) {
3086 IWL_ERROR("Calibration conflict R1 == R3\n");
3087 return -1;
3088 }
3089
3090 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3091 * Add offset to center the adjustment around 0 degrees Centigrade. */
3092 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3093 temperature /= (R3 - R1);
3094 temperature = (temperature * 97) / 100 +
3095 TEMPERATURE_CALIB_KELVIN_OFFSET;
3096
3097 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3098 KELVIN_TO_CELSIUS(temperature));
3099
3100 return temperature;
3101 }
3102
3103 /* Adjust Txpower only if temperature variance is greater than threshold. */
3104 #define IWL_TEMPERATURE_THRESHOLD 3
3105
3106 /**
3107 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3108 *
3109 * If the temperature changed has changed sufficiently, then a recalibration
3110 * is needed.
3111 *
3112 * Assumes caller will replace priv->last_temperature once calibration
3113 * executed.
3114 */
3115 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3116 {
3117 int temp_diff;
3118
3119 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3120 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3121 return 0;
3122 }
3123
3124 temp_diff = priv->temperature - priv->last_temperature;
3125
3126 /* get absolute value */
3127 if (temp_diff < 0) {
3128 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3129 temp_diff = -temp_diff;
3130 } else if (temp_diff == 0)
3131 IWL_DEBUG_POWER("Same temp, \n");
3132 else
3133 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3134
3135 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3136 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3137 return 0;
3138 }
3139
3140 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3141
3142 return 1;
3143 }
3144
3145 /* Calculate noise level, based on measurements during network silence just
3146 * before arriving beacon. This measurement can be done only if we know
3147 * exactly when to expect beacons, therefore only when we're associated. */
3148 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3149 {
3150 struct statistics_rx_non_phy *rx_info
3151 = &(priv->statistics.rx.general);
3152 int num_active_rx = 0;
3153 int total_silence = 0;
3154 int bcn_silence_a =
3155 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3156 int bcn_silence_b =
3157 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3158 int bcn_silence_c =
3159 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3160
3161 if (bcn_silence_a) {
3162 total_silence += bcn_silence_a;
3163 num_active_rx++;
3164 }
3165 if (bcn_silence_b) {
3166 total_silence += bcn_silence_b;
3167 num_active_rx++;
3168 }
3169 if (bcn_silence_c) {
3170 total_silence += bcn_silence_c;
3171 num_active_rx++;
3172 }
3173
3174 /* Average among active antennas */
3175 if (num_active_rx)
3176 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3177 else
3178 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3179
3180 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3181 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3182 priv->last_rx_noise);
3183 }
3184
3185 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3186 {
3187 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3188 int change;
3189 s32 temp;
3190
3191 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3192 (int)sizeof(priv->statistics), pkt->len);
3193
3194 change = ((priv->statistics.general.temperature !=
3195 pkt->u.stats.general.temperature) ||
3196 ((priv->statistics.flag &
3197 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3198 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3199
3200 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3201
3202 set_bit(STATUS_STATISTICS, &priv->status);
3203
3204 /* Reschedule the statistics timer to occur in
3205 * REG_RECALIB_PERIOD seconds to ensure we get a
3206 * thermal update even if the uCode doesn't give
3207 * us one */
3208 mod_timer(&priv->statistics_periodic, jiffies +
3209 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3210
3211 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3212 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3213 iwl4965_rx_calc_noise(priv);
3214 #ifdef CONFIG_IWL4965_SENSITIVITY
3215 queue_work(priv->workqueue, &priv->sensitivity_work);
3216 #endif
3217 }
3218
3219 /* If the hardware hasn't reported a change in
3220 * temperature then don't bother computing a
3221 * calibrated temperature value */
3222 if (!change)
3223 return;
3224
3225 temp = iwl4965_get_temperature(priv);
3226 if (temp < 0)
3227 return;
3228
3229 if (priv->temperature != temp) {
3230 if (priv->temperature)
3231 IWL_DEBUG_TEMP("Temperature changed "
3232 "from %dC to %dC\n",
3233 KELVIN_TO_CELSIUS(priv->temperature),
3234 KELVIN_TO_CELSIUS(temp));
3235 else
3236 IWL_DEBUG_TEMP("Temperature "
3237 "initialized to %dC\n",
3238 KELVIN_TO_CELSIUS(temp));
3239 }
3240
3241 priv->temperature = temp;
3242 set_bit(STATUS_TEMPERATURE, &priv->status);
3243
3244 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3245 iwl4965_is_temp_calib_needed(priv))
3246 queue_work(priv->workqueue, &priv->txpower_work);
3247 }
3248
3249 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3250 struct sk_buff *skb,
3251 struct iwl4965_rx_phy_res *rx_start,
3252 struct ieee80211_rx_status *stats,
3253 u32 ampdu_status)
3254 {
3255 s8 signal = stats->ssi;
3256 s8 noise = 0;
3257 int rate = stats->rate_idx;
3258 u64 tsf = stats->mactime;
3259 __le16 phy_flags_hw = rx_start->phy_flags;
3260 struct iwl4965_rt_rx_hdr {
3261 struct ieee80211_radiotap_header rt_hdr;
3262 __le64 rt_tsf; /* TSF */
3263 u8 rt_flags; /* radiotap packet flags */
3264 u8 rt_rate; /* rate in 500kb/s */
3265 __le16 rt_channelMHz; /* channel in MHz */
3266 __le16 rt_chbitmask; /* channel bitfield */
3267 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3268 s8 rt_dbmnoise;
3269 u8 rt_antenna; /* antenna number */
3270 } __attribute__ ((packed)) *iwl4965_rt;
3271
3272 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3273 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3274 if (net_ratelimit())
3275 printk(KERN_ERR "not enough headroom [%d] for "
3276 "radiotap head [%zd]\n",
3277 skb_headroom(skb), sizeof(*iwl4965_rt));
3278 return;
3279 }
3280
3281 /* put radiotap header in front of 802.11 header and data */
3282 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3283
3284 /* initialise radiotap header */
3285 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3286 iwl4965_rt->rt_hdr.it_pad = 0;
3287
3288 /* total header + data */
3289 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3290 &iwl4965_rt->rt_hdr.it_len);
3291
3292 /* Indicate all the fields we add to the radiotap header */
3293 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3294 (1 << IEEE80211_RADIOTAP_FLAGS) |
3295 (1 << IEEE80211_RADIOTAP_RATE) |
3296 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3297 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3298 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3299 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3300 &iwl4965_rt->rt_hdr.it_present);
3301
3302 /* Zero the flags, we'll add to them as we go */
3303 iwl4965_rt->rt_flags = 0;
3304
3305 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3306
3307 iwl4965_rt->rt_dbmsignal = signal;
3308 iwl4965_rt->rt_dbmnoise = noise;
3309
3310 /* Convert the channel frequency and set the flags */
3311 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3312 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3313 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3314 IEEE80211_CHAN_5GHZ),
3315 &iwl4965_rt->rt_chbitmask);
3316 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3317 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3318 IEEE80211_CHAN_2GHZ),
3319 &iwl4965_rt->rt_chbitmask);
3320 else /* 802.11g */
3321 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3322 IEEE80211_CHAN_2GHZ),
3323 &iwl4965_rt->rt_chbitmask);
3324
3325 if (rate == -1)
3326 iwl4965_rt->rt_rate = 0;
3327 else
3328 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3329
3330 /*
3331 * "antenna number"
3332 *
3333 * It seems that the antenna field in the phy flags value
3334 * is actually a bitfield. This is undefined by radiotap,
3335 * it wants an actual antenna number but I always get "7"
3336 * for most legacy frames I receive indicating that the
3337 * same frame was received on all three RX chains.
3338 *
3339 * I think this field should be removed in favour of a
3340 * new 802.11n radiotap field "RX chains" that is defined
3341 * as a bitmask.
3342 */
3343 iwl4965_rt->rt_antenna =
3344 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3345
3346 /* set the preamble flag if appropriate */
3347 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3348 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3349
3350 stats->flag |= RX_FLAG_RADIOTAP;
3351 }
3352
3353 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3354 {
3355 /* 0 - mgmt, 1 - cnt, 2 - data */
3356 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3357 priv->rx_stats[idx].cnt++;
3358 priv->rx_stats[idx].bytes += len;
3359 }
3360
3361 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3362 int include_phy,
3363 struct iwl4965_rx_mem_buffer *rxb,
3364 struct ieee80211_rx_status *stats)
3365 {
3366 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3367 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3368 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3369 struct ieee80211_hdr *hdr;
3370 u16 len;
3371 __le32 *rx_end;
3372 unsigned int skblen;
3373 u32 ampdu_status;
3374
3375 if (!include_phy && priv->last_phy_res[0])
3376 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3377
3378 if (!rx_start) {
3379 IWL_ERROR("MPDU frame without a PHY data\n");
3380 return;
3381 }
3382 if (include_phy) {
3383 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3384 rx_start->cfg_phy_cnt);
3385
3386 len = le16_to_cpu(rx_start->byte_count);
3387
3388 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3389 sizeof(struct iwl4965_rx_phy_res) +
3390 rx_start->cfg_phy_cnt + len);
3391
3392 } else {
3393 struct iwl4965_rx_mpdu_res_start *amsdu =
3394 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3395
3396 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3397 sizeof(struct iwl4965_rx_mpdu_res_start));
3398 len = le16_to_cpu(amsdu->byte_count);
3399 rx_start->byte_count = amsdu->byte_count;
3400 rx_end = (__le32 *) (((u8 *) hdr) + len);
3401 }
3402 if (len > priv->hw_setting.max_pkt_size || len < 16) {
3403 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3404 return;
3405 }
3406
3407 ampdu_status = le32_to_cpu(*rx_end);
3408 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3409
3410 /* start from MAC */
3411 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3412 skb_put(rxb->skb, len); /* end where data ends */
3413
3414 /* We only process data packets if the interface is open */
3415 if (unlikely(!priv->is_open)) {
3416 IWL_DEBUG_DROP_LIMIT
3417 ("Dropping packet while interface is not open.\n");
3418 return;
3419 }
3420
3421 stats->flag = 0;
3422 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3423
3424 if (iwl4965_mod_params.hw_crypto)
3425 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3426
3427 if (priv->add_radiotap)
3428 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3429
3430 iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3431 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3432 priv->alloc_rxb_skb--;
3433 rxb->skb = NULL;
3434 #ifdef LED
3435 priv->led_packets += len;
3436 iwl4965_setup_activity_timer(priv);
3437 #endif
3438 }
3439
3440 /* Calc max signal level (dBm) among 3 possible receivers */
3441 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3442 {
3443 /* data from PHY/DSP regarding signal strength, etc.,
3444 * contents are always there, not configurable by host. */
3445 struct iwl4965_rx_non_cfg_phy *ncphy =
3446 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3447 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3448 >> IWL_AGC_DB_POS;
3449
3450 u32 valid_antennae =
3451 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3452 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3453 u8 max_rssi = 0;
3454 u32 i;
3455
3456 /* Find max rssi among 3 possible receivers.
3457 * These values are measured by the digital signal processor (DSP).
3458 * They should stay fairly constant even as the signal strength varies,
3459 * if the radio's automatic gain control (AGC) is working right.
3460 * AGC value (see below) will provide the "interesting" info. */
3461 for (i = 0; i < 3; i++)
3462 if (valid_antennae & (1 << i))
3463 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3464
3465 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3466 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3467 max_rssi, agc);
3468
3469 /* dBm = max_rssi dB - agc dB - constant.
3470 * Higher AGC (higher radio gain) means lower signal. */
3471 return (max_rssi - agc - IWL_RSSI_OFFSET);
3472 }
3473
3474 #ifdef CONFIG_IWL4965_HT
3475
3476 /* Parsed Information Elements */
3477 struct ieee802_11_elems {
3478 u8 *ds_params;
3479 u8 ds_params_len;
3480 u8 *tim;
3481 u8 tim_len;
3482 u8 *ibss_params;
3483 u8 ibss_params_len;
3484 u8 *erp_info;
3485 u8 erp_info_len;
3486 u8 *ht_cap_param;
3487 u8 ht_cap_param_len;
3488 u8 *ht_extra_param;
3489 u8 ht_extra_param_len;
3490 };
3491
3492 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3493 {
3494 size_t left = len;
3495 u8 *pos = start;
3496 int unknown = 0;
3497
3498 memset(elems, 0, sizeof(*elems));
3499
3500 while (left >= 2) {
3501 u8 id, elen;
3502
3503 id = *pos++;
3504 elen = *pos++;
3505 left -= 2;
3506
3507 if (elen > left)
3508 return -1;
3509
3510 switch (id) {
3511 case WLAN_EID_DS_PARAMS:
3512 elems->ds_params = pos;
3513 elems->ds_params_len = elen;
3514 break;
3515 case WLAN_EID_TIM:
3516 elems->tim = pos;
3517 elems->tim_len = elen;
3518 break;
3519 case WLAN_EID_IBSS_PARAMS:
3520 elems->ibss_params = pos;
3521 elems->ibss_params_len = elen;
3522 break;
3523 case WLAN_EID_ERP_INFO:
3524 elems->erp_info = pos;
3525 elems->erp_info_len = elen;
3526 break;
3527 case WLAN_EID_HT_CAPABILITY:
3528 elems->ht_cap_param = pos;
3529 elems->ht_cap_param_len = elen;
3530 break;
3531 case WLAN_EID_HT_EXTRA_INFO:
3532 elems->ht_extra_param = pos;
3533 elems->ht_extra_param_len = elen;
3534 break;
3535 default:
3536 unknown++;
3537 break;
3538 }
3539
3540 left -= elen;
3541 pos += elen;
3542 }
3543
3544 return 0;
3545 }
3546
3547 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info,
3548 enum ieee80211_band band)
3549 {
3550 ht_info->cap = 0;
3551 memset(ht_info->supp_mcs_set, 0, 16);
3552
3553 ht_info->ht_supported = 1;
3554
3555 if (band == IEEE80211_BAND_5GHZ) {
3556 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3557 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3558 ht_info->supp_mcs_set[4] = 0x01;
3559 }
3560 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3561 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3562 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3563 (IWL_MIMO_PS_NONE << 2));
3564 if (iwl4965_mod_params.amsdu_size_8K) {
3565 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3566 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3567 }
3568
3569 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3570 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3571
3572 ht_info->supp_mcs_set[0] = 0xFF;
3573 ht_info->supp_mcs_set[1] = 0xFF;
3574 }
3575 #endif /* CONFIG_IWL4965_HT */
3576
3577 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3578 {
3579 unsigned long flags;
3580
3581 spin_lock_irqsave(&priv->sta_lock, flags);
3582 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3583 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3584 priv->stations[sta_id].sta.sta.modify_mask = 0;
3585 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3586 spin_unlock_irqrestore(&priv->sta_lock, flags);
3587
3588 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3589 }
3590
3591 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3592 {
3593 /* FIXME: need locking over ps_status ??? */
3594 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3595
3596 if (sta_id != IWL_INVALID_STATION) {
3597 u8 sta_awake = priv->stations[sta_id].
3598 ps_status == STA_PS_STATUS_WAKE;
3599
3600 if (sta_awake && ps_bit)
3601 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3602 else if (!sta_awake && !ps_bit) {
3603 iwl4965_sta_modify_ps_wake(priv, sta_id);
3604 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3605 }
3606 }
3607 }
3608 #ifdef CONFIG_IWLWIFI_DEBUG
3609
3610 /**
3611 * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3612 *
3613 * You may hack this function to show different aspects of received frames,
3614 * including selective frame dumps.
3615 * group100 parameter selects whether to show 1 out of 100 good frames.
3616 *
3617 * TODO: This was originally written for 3945, need to audit for
3618 * proper operation with 4965.
3619 */
3620 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3621 struct iwl4965_rx_packet *pkt,
3622 struct ieee80211_hdr *header, int group100)
3623 {
3624 u32 to_us;
3625 u32 print_summary = 0;
3626 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
3627 u32 hundred = 0;
3628 u32 dataframe = 0;
3629 u16 fc;
3630 u16 seq_ctl;
3631 u16 channel;
3632 u16 phy_flags;
3633 int rate_sym;
3634 u16 length;
3635 u16 status;
3636 u16 bcn_tmr;
3637 u32 tsf_low;
3638 u64 tsf;
3639 u8 rssi;
3640 u8 agc;
3641 u16 sig_avg;
3642 u16 noise_diff;
3643 struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3644 struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3645 struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3646 u8 *data = IWL_RX_DATA(pkt);
3647
3648 if (likely(!(iwl_debug_level & IWL_DL_RX)))
3649 return;
3650
3651 /* MAC header */
3652 fc = le16_to_cpu(header->frame_control);
3653 seq_ctl = le16_to_cpu(header->seq_ctrl);
3654
3655 /* metadata */
3656 channel = le16_to_cpu(rx_hdr->channel);
3657 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3658 rate_sym = rx_hdr->rate;
3659 length = le16_to_cpu(rx_hdr->len);
3660
3661 /* end-of-frame status and timestamp */
3662 status = le32_to_cpu(rx_end->status);
3663 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3664 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3665 tsf = le64_to_cpu(rx_end->timestamp);
3666
3667 /* signal statistics */
3668 rssi = rx_stats->rssi;
3669 agc = rx_stats->agc;
3670 sig_avg = le16_to_cpu(rx_stats->sig_avg);
3671 noise_diff = le16_to_cpu(rx_stats->noise_diff);
3672
3673 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3674
3675 /* if data frame is to us and all is good,
3676 * (optionally) print summary for only 1 out of every 100 */
3677 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3678 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3679 dataframe = 1;
3680 if (!group100)
3681 print_summary = 1; /* print each frame */
3682 else if (priv->framecnt_to_us < 100) {
3683 priv->framecnt_to_us++;
3684 print_summary = 0;
3685 } else {
3686 priv->framecnt_to_us = 0;
3687 print_summary = 1;
3688 hundred = 1;
3689 }
3690 } else {
3691 /* print summary for all other frames */
3692 print_summary = 1;
3693 }
3694
3695 if (print_summary) {
3696 char *title;
3697 int rate_idx;
3698 u32 bitrate;
3699
3700 if (hundred)
3701 title = "100Frames";
3702 else if (fc & IEEE80211_FCTL_RETRY)
3703 title = "Retry";
3704 else if (ieee80211_is_assoc_response(fc))
3705 title = "AscRsp";
3706 else if (ieee80211_is_reassoc_response(fc))
3707 title = "RasRsp";
3708 else if (ieee80211_is_probe_response(fc)) {
3709 title = "PrbRsp";
3710 print_dump = 1; /* dump frame contents */
3711 } else if (ieee80211_is_beacon(fc)) {
3712 title = "Beacon";
3713 print_dump = 1; /* dump frame contents */
3714 } else if (ieee80211_is_atim(fc))
3715 title = "ATIM";
3716 else if (ieee80211_is_auth(fc))
3717 title = "Auth";
3718 else if (ieee80211_is_deauth(fc))
3719 title = "DeAuth";
3720 else if (ieee80211_is_disassoc(fc))
3721 title = "DisAssoc";
3722 else
3723 title = "Frame";
3724
3725 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3726 if (unlikely(rate_idx == -1))
3727 bitrate = 0;
3728 else
3729 bitrate = iwl4965_rates[rate_idx].ieee / 2;
3730
3731 /* print frame summary.
3732 * MAC addresses show just the last byte (for brevity),
3733 * but you can hack it to show more, if you'd like to. */
3734 if (dataframe)
3735 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3736 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3737 title, fc, header->addr1[5],
3738 length, rssi, channel, bitrate);
3739 else {
3740 /* src/dst addresses assume managed mode */
3741 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3742 "src=0x%02x, rssi=%u, tim=%lu usec, "
3743 "phy=0x%02x, chnl=%d\n",
3744 title, fc, header->addr1[5],
3745 header->addr3[5], rssi,
3746 tsf_low - priv->scan_start_tsf,
3747 phy_flags, channel);
3748 }
3749 }
3750 if (print_dump)
3751 iwl_print_hex_dump(IWL_DL_RX, data, length);
3752 }
3753 #else
3754 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3755 struct iwl4965_rx_packet *pkt,
3756 struct ieee80211_hdr *header,
3757 int group100)
3758 {
3759 }
3760 #endif
3761
3762
3763 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3764
3765 /* Called for REPLY_4965_RX (legacy ABG frames), or
3766 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3767 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3768 struct iwl4965_rx_mem_buffer *rxb)
3769 {
3770 struct ieee80211_hdr *header;
3771 struct ieee80211_rx_status rx_status;
3772 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3773 /* Use phy data (Rx signal strength, etc.) contained within
3774 * this rx packet for legacy frames,
3775 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3776 int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3777 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3778 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3779 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3780 __le32 *rx_end;
3781 unsigned int len = 0;
3782 u16 fc;
3783 u8 network_packet;
3784
3785 rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3786 rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3787 rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3788 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3789 rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3790 le32_to_cpu(rx_start->rate_n_flags));
3791
3792 if (rx_status.band == IEEE80211_BAND_5GHZ)
3793 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3794
3795 rx_status.antenna = 0;
3796 rx_status.flag = 0;
3797
3798 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3799 IWL_DEBUG_DROP
3800 ("dsp size out of range [0,20]: "
3801 "%d/n", rx_start->cfg_phy_cnt);
3802 return;
3803 }
3804
3805 if (!include_phy) {
3806 if (priv->last_phy_res[0])
3807 rx_start = (struct iwl4965_rx_phy_res *)
3808 &priv->last_phy_res[1];
3809 else
3810 rx_start = NULL;
3811 }
3812
3813 if (!rx_start) {
3814 IWL_ERROR("MPDU frame without a PHY data\n");
3815 return;
3816 }
3817
3818 if (include_phy) {
3819 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3820 + rx_start->cfg_phy_cnt);
3821
3822 len = le16_to_cpu(rx_start->byte_count);
3823 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3824 sizeof(struct iwl4965_rx_phy_res) + len);
3825 } else {
3826 struct iwl4965_rx_mpdu_res_start *amsdu =
3827 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3828
3829 header = (void *)(pkt->u.raw +
3830 sizeof(struct iwl4965_rx_mpdu_res_start));
3831 len = le16_to_cpu(amsdu->byte_count);
3832 rx_end = (__le32 *) (pkt->u.raw +
3833 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3834 }
3835
3836 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3837 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3838 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3839 le32_to_cpu(*rx_end));
3840 return;
3841 }
3842
3843 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3844
3845 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3846 rx_status.ssi = iwl4965_calc_rssi(rx_start);
3847
3848 /* Meaningful noise values are available only from beacon statistics,
3849 * which are gathered only when associated, and indicate noise
3850 * only for the associated network channel ...
3851 * Ignore these noise values while scanning (other channels) */
3852 if (iwl4965_is_associated(priv) &&
3853 !test_bit(STATUS_SCANNING, &priv->status)) {
3854 rx_status.noise = priv->last_rx_noise;
3855 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3856 rx_status.noise);
3857 } else {
3858 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3859 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3860 }
3861
3862 /* Reset beacon noise level if not associated. */
3863 if (!iwl4965_is_associated(priv))
3864 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3865
3866 /* Set "1" to report good data frames in groups of 100 */
3867 /* FIXME: need to optimze the call: */
3868 iwl4965_dbg_report_frame(priv, pkt, header, 1);
3869
3870 IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3871 rx_status.ssi, rx_status.noise, rx_status.signal,
3872 rx_status.mactime);
3873
3874 network_packet = iwl4965_is_network_packet(priv, header);
3875 if (network_packet) {
3876 priv->last_rx_rssi = rx_status.ssi;
3877 priv->last_beacon_time = priv->ucode_beacon_time;
3878 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3879 }
3880
3881 fc = le16_to_cpu(header->frame_control);
3882 switch (fc & IEEE80211_FCTL_FTYPE) {
3883 case IEEE80211_FTYPE_MGMT:
3884
3885 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3886 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3887 header->addr2);
3888 switch (fc & IEEE80211_FCTL_STYPE) {
3889 case IEEE80211_STYPE_PROBE_RESP:
3890 case IEEE80211_STYPE_BEACON:
3891 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
3892 !compare_ether_addr(header->addr2, priv->bssid)) ||
3893 (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
3894 !compare_ether_addr(header->addr3, priv->bssid))) {
3895 struct ieee80211_mgmt *mgmt =
3896 (struct ieee80211_mgmt *)header;
3897 u64 timestamp =
3898 le64_to_cpu(mgmt->u.beacon.timestamp);
3899
3900 priv->timestamp0 = timestamp & 0xFFFFFFFF;
3901 priv->timestamp1 =
3902 (timestamp >> 32) & 0xFFFFFFFF;
3903 priv->beacon_int = le16_to_cpu(
3904 mgmt->u.beacon.beacon_int);
3905 if (priv->call_post_assoc_from_beacon &&
3906 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
3907 priv->call_post_assoc_from_beacon = 0;
3908 queue_work(priv->workqueue,
3909 &priv->post_associate.work);
3910 }
3911 }
3912 break;
3913
3914 case IEEE80211_STYPE_ACTION:
3915 break;
3916
3917 /*
3918 * TODO: Use the new callback function from
3919 * mac80211 instead of sniffing these packets.
3920 */
3921 case IEEE80211_STYPE_ASSOC_RESP:
3922 case IEEE80211_STYPE_REASSOC_RESP:
3923 if (network_packet) {
3924 #ifdef CONFIG_IWL4965_HT
3925 u8 *pos = NULL;
3926 struct ieee802_11_elems elems;
3927 #endif /*CONFIG_IWL4965_HT */
3928 struct ieee80211_mgmt *mgnt =
3929 (struct ieee80211_mgmt *)header;
3930
3931 /* We have just associated, give some
3932 * time for the 4-way handshake if
3933 * any. Don't start scan too early. */
3934 priv->next_scan_jiffies = jiffies +
3935 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3936
3937 priv->assoc_id = (~((1 << 15) | (1 << 14))
3938 & le16_to_cpu(mgnt->u.assoc_resp.aid));
3939 priv->assoc_capability =
3940 le16_to_cpu(
3941 mgnt->u.assoc_resp.capab_info);
3942 #ifdef CONFIG_IWL4965_HT
3943 pos = mgnt->u.assoc_resp.variable;
3944 if (!parse_elems(pos,
3945 len - (pos - (u8 *) mgnt),
3946 &elems)) {
3947 if (elems.ht_extra_param &&
3948 elems.ht_cap_param)
3949 break;
3950 }
3951 #endif /*CONFIG_IWL4965_HT */
3952 /* assoc_id is 0 no association */
3953 if (!priv->assoc_id)
3954 break;
3955 if (priv->beacon_int)
3956 queue_work(priv->workqueue,
3957 &priv->post_associate.work);
3958 else
3959 priv->call_post_assoc_from_beacon = 1;
3960 }
3961
3962 break;
3963
3964 case IEEE80211_STYPE_PROBE_REQ:
3965 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
3966 !iwl4965_is_associated(priv)) {
3967 DECLARE_MAC_BUF(mac1);
3968 DECLARE_MAC_BUF(mac2);
3969 DECLARE_MAC_BUF(mac3);
3970
3971 IWL_DEBUG_DROP("Dropping (non network): "
3972 "%s, %s, %s\n",
3973 print_mac(mac1, header->addr1),
3974 print_mac(mac2, header->addr2),
3975 print_mac(mac3, header->addr3));
3976 return;
3977 }
3978 }
3979 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3980 break;
3981
3982 case IEEE80211_FTYPE_CTL:
3983 #ifdef CONFIG_IWL4965_HT
3984 switch (fc & IEEE80211_FCTL_STYPE) {
3985 case IEEE80211_STYPE_BACK_REQ:
3986 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3987 iwl4965_handle_data_packet(priv, 0, include_phy,
3988 rxb, &rx_status);
3989 break;
3990 default:
3991 break;
3992 }
3993 #endif
3994 break;
3995
3996 case IEEE80211_FTYPE_DATA: {
3997 DECLARE_MAC_BUF(mac1);
3998 DECLARE_MAC_BUF(mac2);
3999 DECLARE_MAC_BUF(mac3);
4000
4001 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4002 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4003 header->addr2);
4004
4005 if (unlikely(!network_packet))
4006 IWL_DEBUG_DROP("Dropping (non network): "
4007 "%s, %s, %s\n",
4008 print_mac(mac1, header->addr1),
4009 print_mac(mac2, header->addr2),
4010 print_mac(mac3, header->addr3));
4011 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4012 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4013 print_mac(mac1, header->addr1),
4014 print_mac(mac2, header->addr2),
4015 print_mac(mac3, header->addr3));
4016 else
4017 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4018 &rx_status);
4019 break;
4020 }
4021 default:
4022 break;
4023
4024 }
4025 }
4026
4027 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4028 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4029 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
4030 struct iwl4965_rx_mem_buffer *rxb)
4031 {
4032 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4033 priv->last_phy_res[0] = 1;
4034 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4035 sizeof(struct iwl4965_rx_phy_res));
4036 }
4037
4038 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
4039 struct iwl4965_rx_mem_buffer *rxb)
4040
4041 {
4042 #ifdef CONFIG_IWL4965_SENSITIVITY
4043 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4044 struct iwl4965_missed_beacon_notif *missed_beacon;
4045
4046 missed_beacon = &pkt->u.missed_beacon;
4047 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4048 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4049 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4050 le32_to_cpu(missed_beacon->total_missed_becons),
4051 le32_to_cpu(missed_beacon->num_recvd_beacons),
4052 le32_to_cpu(missed_beacon->num_expected_beacons));
4053 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4054 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4055 queue_work(priv->workqueue, &priv->sensitivity_work);
4056 }
4057 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4058 }
4059
4060 #ifdef CONFIG_IWL4965_HT
4061
4062 /**
4063 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4064 */
4065 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4066 int sta_id, int tid)
4067 {
4068 unsigned long flags;
4069
4070 /* Remove "disable" flag, to enable Tx for this TID */
4071 spin_lock_irqsave(&priv->sta_lock, flags);
4072 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4073 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4074 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4075 spin_unlock_irqrestore(&priv->sta_lock, flags);
4076
4077 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4078 }
4079
4080 /**
4081 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4082 *
4083 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4084 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4085 */
4086 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4087 struct iwl4965_ht_agg *agg,
4088 struct iwl4965_compressed_ba_resp*
4089 ba_resp)
4090
4091 {
4092 int i, sh, ack;
4093 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4094 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4095 u64 bitmap;
4096 int successes = 0;
4097 struct ieee80211_tx_status *tx_status;
4098
4099 if (unlikely(!agg->wait_for_ba)) {
4100 IWL_ERROR("Received BA when not expected\n");
4101 return -EINVAL;
4102 }
4103
4104 /* Mark that the expected block-ack response arrived */
4105 agg->wait_for_ba = 0;
4106 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4107
4108 /* Calculate shift to align block-ack bits with our Tx window bits */
4109 sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4110 if (sh < 0) /* tbw something is wrong with indices */
4111 sh += 0x100;
4112
4113 /* don't use 64-bit values for now */
4114 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4115
4116 if (agg->frame_count > (64 - sh)) {
4117 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4118 return -1;
4119 }
4120
4121 /* check for success or failure according to the
4122 * transmitted bitmap and block-ack bitmap */
4123 bitmap &= agg->bitmap;
4124
4125 /* For each frame attempted in aggregation,
4126 * update driver's record of tx frame's status. */
4127 for (i = 0; i < agg->frame_count ; i++) {
4128 ack = bitmap & (1 << i);
4129 successes += !!ack;
4130 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4131 ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4132 agg->start_idx + i);
4133 }
4134
4135 tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4136 tx_status->flags = IEEE80211_TX_STATUS_ACK;
4137 tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4138 tx_status->ampdu_ack_map = successes;
4139 tx_status->ampdu_ack_len = agg->frame_count;
4140 iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4141 &tx_status->control);
4142
4143 IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4144
4145 return 0;
4146 }
4147
4148 /**
4149 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4150 */
4151 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
4152 u16 txq_id)
4153 {
4154 /* Simply stop the queue, but don't change any configuration;
4155 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4156 iwl4965_write_prph(priv,
4157 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4158 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4159 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4160 }
4161
4162 /**
4163 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4164 * priv->lock must be held by the caller
4165 */
4166 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4167 u16 ssn_idx, u8 tx_fifo)
4168 {
4169 int ret = 0;
4170
4171 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4172 IWL_WARNING("queue number too small: %d, must be > %d\n",
4173 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4174 return -EINVAL;
4175 }
4176
4177 ret = iwl4965_grab_nic_access(priv);
4178 if (ret)
4179 return ret;
4180
4181 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4182
4183 iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4184
4185 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4186 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4187 /* supposes that ssn_idx is valid (!= 0xFFF) */
4188 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4189
4190 iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4191 iwl4965_txq_ctx_deactivate(priv, txq_id);
4192 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4193
4194 iwl4965_release_nic_access(priv);
4195
4196 return 0;
4197 }
4198
4199 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
4200 u8 tid, int txq_id)
4201 {
4202 struct iwl4965_queue *q = &priv->txq[txq_id].q;
4203 u8 *addr = priv->stations[sta_id].sta.sta.addr;
4204 struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4205
4206 switch (priv->stations[sta_id].tid[tid].agg.state) {
4207 case IWL_EMPTYING_HW_QUEUE_DELBA:
4208 /* We are reclaiming the last packet of the */
4209 /* aggregated HW queue */
4210 if (txq_id == tid_data->agg.txq_id &&
4211 q->read_ptr == q->write_ptr) {
4212 u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4213 int tx_fifo = default_tid_to_tx_fifo[tid];
4214 IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4215 iwl4965_tx_queue_agg_disable(priv, txq_id,
4216 ssn, tx_fifo);
4217 tid_data->agg.state = IWL_AGG_OFF;
4218 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4219 }
4220 break;
4221 case IWL_EMPTYING_HW_QUEUE_ADDBA:
4222 /* We are reclaiming the last packet of the queue */
4223 if (tid_data->tfds_in_queue == 0) {
4224 IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4225 tid_data->agg.state = IWL_AGG_ON;
4226 ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4227 }
4228 break;
4229 }
4230 return 0;
4231 }
4232
4233 /**
4234 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4235 * @index -- current index
4236 * @n_bd -- total number of entries in queue (s/b power of 2)
4237 */
4238 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4239 {
4240 return (index == 0) ? n_bd - 1 : index - 1;
4241 }
4242
4243 /**
4244 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4245 *
4246 * Handles block-acknowledge notification from device, which reports success
4247 * of frames sent via aggregation.
4248 */
4249 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4250 struct iwl4965_rx_mem_buffer *rxb)
4251 {
4252 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4253 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4254 int index;
4255 struct iwl4965_tx_queue *txq = NULL;
4256 struct iwl4965_ht_agg *agg;
4257 DECLARE_MAC_BUF(mac);
4258
4259 /* "flow" corresponds to Tx queue */
4260 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4261
4262 /* "ssn" is start of block-ack Tx window, corresponds to index
4263 * (in Tx queue's circular buffer) of first TFD/frame in window */
4264 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4265
4266 if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4267 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4268 return;
4269 }
4270
4271 txq = &priv->txq[scd_flow];
4272 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4273
4274 /* Find index just before block-ack window */
4275 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4276
4277 /* TODO: Need to get this copy more safely - now good for debug */
4278
4279 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4280 "sta_id = %d\n",
4281 agg->wait_for_ba,
4282 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4283 ba_resp->sta_id);
4284 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4285 "%d, scd_ssn = %d\n",
4286 ba_resp->tid,
4287 ba_resp->seq_ctl,
4288 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4289 ba_resp->scd_flow,
4290 ba_resp->scd_ssn);
4291 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4292 agg->start_idx,
4293 (unsigned long long)agg->bitmap);
4294
4295 /* Update driver's record of ACK vs. not for each frame in window */
4296 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4297
4298 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4299 * block-ack window (we assume that they've been successfully
4300 * transmitted ... if not, it's too late anyway). */
4301 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4302 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4303 priv->stations[ba_resp->sta_id].
4304 tid[ba_resp->tid].tfds_in_queue -= freed;
4305 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4306 priv->mac80211_registered &&
4307 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4308 ieee80211_wake_queue(priv->hw, scd_flow);
4309 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4310 ba_resp->tid, scd_flow);
4311 }
4312 }
4313
4314 /**
4315 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4316 */
4317 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4318 u16 txq_id)
4319 {
4320 u32 tbl_dw_addr;
4321 u32 tbl_dw;
4322 u16 scd_q2ratid;
4323
4324 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4325
4326 tbl_dw_addr = priv->scd_base_addr +
4327 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4328
4329 tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4330
4331 if (txq_id & 0x1)
4332 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4333 else
4334 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4335
4336 iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4337
4338 return 0;
4339 }
4340
4341
4342 /**
4343 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4344 *
4345 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4346 * i.e. it must be one of the higher queues used for aggregation
4347 */
4348 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4349 int tx_fifo, int sta_id, int tid,
4350 u16 ssn_idx)
4351 {
4352 unsigned long flags;
4353 int rc;
4354 u16 ra_tid;
4355
4356 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4357 IWL_WARNING("queue number too small: %d, must be > %d\n",
4358 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4359
4360 ra_tid = BUILD_RAxTID(sta_id, tid);
4361
4362 /* Modify device's station table to Tx this TID */
4363 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4364
4365 spin_lock_irqsave(&priv->lock, flags);
4366 rc = iwl4965_grab_nic_access(priv);
4367 if (rc) {
4368 spin_unlock_irqrestore(&priv->lock, flags);
4369 return rc;
4370 }
4371
4372 /* Stop this Tx queue before configuring it */
4373 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4374
4375 /* Map receiver-address / traffic-ID to this queue */
4376 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4377
4378 /* Set this queue as a chain-building queue */
4379 iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4380
4381 /* Place first TFD at index corresponding to start sequence number.
4382 * Assumes that ssn_idx is valid (!= 0xFFF) */
4383 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4384 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4385 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4386
4387 /* Set up Tx window size and frame limit for this queue */
4388 iwl4965_write_targ_mem(priv,
4389 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4390 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4391 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4392
4393 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4394 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4395 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4396 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4397
4398 iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4399
4400 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4401 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4402
4403 iwl4965_release_nic_access(priv);
4404 spin_unlock_irqrestore(&priv->lock, flags);
4405
4406 return 0;
4407 }
4408
4409 #endif /* CONFIG_IWL4965_HT */
4410
4411 /**
4412 * iwl4965_add_station - Initialize a station's hardware rate table
4413 *
4414 * The uCode's station table contains a table of fallback rates
4415 * for automatic fallback during transmission.
4416 *
4417 * NOTE: This sets up a default set of values. These will be replaced later
4418 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4419 * rc80211_simple.
4420 *
4421 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4422 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4423 * which requires station table entry to exist).
4424 */
4425 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4426 {
4427 int i, r;
4428 struct iwl4965_link_quality_cmd link_cmd = {
4429 .reserved1 = 0,
4430 };
4431 u16 rate_flags;
4432
4433 /* Set up the rate scaling to start at selected rate, fall back
4434 * all the way down to 1M in IEEE order, and then spin on 1M */
4435 if (is_ap)
4436 r = IWL_RATE_54M_INDEX;
4437 else if (priv->band == IEEE80211_BAND_5GHZ)
4438 r = IWL_RATE_6M_INDEX;
4439 else
4440 r = IWL_RATE_1M_INDEX;
4441
4442 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4443 rate_flags = 0;
4444 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4445 rate_flags |= RATE_MCS_CCK_MSK;
4446
4447 /* Use Tx antenna B only */
4448 rate_flags |= RATE_MCS_ANT_B_MSK;
4449 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4450
4451 link_cmd.rs_table[i].rate_n_flags =
4452 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4453 r = iwl4965_get_prev_ieee_rate(r);
4454 }
4455
4456 link_cmd.general_params.single_stream_ant_msk = 2;
4457 link_cmd.general_params.dual_stream_ant_msk = 3;
4458 link_cmd.agg_params.agg_dis_start_th = 3;
4459 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4460
4461 /* Update the rate scaling for control frame Tx to AP */
4462 link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_setting.bcast_sta_id;
4463
4464 iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4465 &link_cmd);
4466 }
4467
4468 #ifdef CONFIG_IWL4965_HT
4469
4470 static u8 iwl4965_is_channel_extension(struct iwl_priv *priv,
4471 enum ieee80211_band band,
4472 u16 channel, u8 extension_chan_offset)
4473 {
4474 const struct iwl4965_channel_info *ch_info;
4475
4476 ch_info = iwl4965_get_channel_info(priv, band, channel);
4477 if (!is_channel_valid(ch_info))
4478 return 0;
4479
4480 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4481 return 0;
4482
4483 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4484 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4485 return 1;
4486
4487 return 0;
4488 }
4489
4490 static u8 iwl4965_is_fat_tx_allowed(struct iwl_priv *priv,
4491 struct ieee80211_ht_info *sta_ht_inf)
4492 {
4493 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4494
4495 if ((!iwl_ht_conf->is_ht) ||
4496 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4497 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4498 return 0;
4499
4500 if (sta_ht_inf) {
4501 if ((!sta_ht_inf->ht_supported) ||
4502 (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4503 return 0;
4504 }
4505
4506 return (iwl4965_is_channel_extension(priv, priv->band,
4507 iwl_ht_conf->control_channel,
4508 iwl_ht_conf->extension_chan_offset));
4509 }
4510
4511 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
4512 {
4513 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4514 u32 val;
4515
4516 if (!ht_info->is_ht)
4517 return;
4518
4519 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4520 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4521 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4522 else
4523 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4524 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4525
4526 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4527 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4528 le16_to_cpu(rxon->channel),
4529 ht_info->control_channel);
4530 rxon->channel = cpu_to_le16(ht_info->control_channel);
4531 return;
4532 }
4533
4534 /* Note: control channel is opposite of extension channel */
4535 switch (ht_info->extension_chan_offset) {
4536 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4537 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4538 break;
4539 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4540 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4541 break;
4542 case IWL_EXT_CHANNEL_OFFSET_NONE:
4543 default:
4544 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4545 break;
4546 }
4547
4548 val = ht_info->ht_protection;
4549
4550 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4551
4552 iwl4965_set_rxon_chain(priv);
4553
4554 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4555 "rxon flags 0x%X operation mode :0x%X "
4556 "extension channel offset 0x%x "
4557 "control chan %d\n",
4558 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4559 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4560 ht_info->extension_chan_offset,
4561 ht_info->control_channel);
4562 return;
4563 }
4564
4565 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index,
4566 struct ieee80211_ht_info *sta_ht_inf)
4567 {
4568 __le32 sta_flags;
4569 u8 mimo_ps_mode;
4570
4571 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4572 goto done;
4573
4574 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4575
4576 sta_flags = priv->stations[index].sta.station_flags;
4577
4578 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4579
4580 switch (mimo_ps_mode) {
4581 case WLAN_HT_CAP_MIMO_PS_STATIC:
4582 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4583 break;
4584 case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4585 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4586 break;
4587 case WLAN_HT_CAP_MIMO_PS_DISABLED:
4588 break;
4589 default:
4590 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4591 break;
4592 }
4593
4594 sta_flags |= cpu_to_le32(
4595 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4596
4597 sta_flags |= cpu_to_le32(
4598 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4599
4600 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4601 sta_flags |= STA_FLG_FAT_EN_MSK;
4602 else
4603 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4604
4605 priv->stations[index].sta.station_flags = sta_flags;
4606 done:
4607 return;
4608 }
4609
4610 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4611 int sta_id, int tid, u16 ssn)
4612 {
4613 unsigned long flags;
4614
4615 spin_lock_irqsave(&priv->sta_lock, flags);
4616 priv->stations[sta_id].sta.station_flags_msk = 0;
4617 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4618 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4619 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4620 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4621 spin_unlock_irqrestore(&priv->sta_lock, flags);
4622
4623 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4624 }
4625
4626 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4627 int sta_id, int tid)
4628 {
4629 unsigned long flags;
4630
4631 spin_lock_irqsave(&priv->sta_lock, flags);
4632 priv->stations[sta_id].sta.station_flags_msk = 0;
4633 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4634 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4635 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4636 spin_unlock_irqrestore(&priv->sta_lock, flags);
4637
4638 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4639 }
4640
4641 /*
4642 * Find first available (lowest unused) Tx Queue, mark it "active".
4643 * Called only when finding queue for aggregation.
4644 * Should never return anything < 7, because they should already
4645 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4646 */
4647 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
4648 {
4649 int txq_id;
4650
4651 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4652 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4653 return txq_id;
4654 return -1;
4655 }
4656
4657 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4658 u16 tid, u16 *start_seq_num)
4659 {
4660 struct iwl_priv *priv = hw->priv;
4661 int sta_id;
4662 int tx_fifo;
4663 int txq_id;
4664 int ssn = -1;
4665 int ret = 0;
4666 unsigned long flags;
4667 struct iwl4965_tid_data *tid_data;
4668 DECLARE_MAC_BUF(mac);
4669
4670 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4671 tx_fifo = default_tid_to_tx_fifo[tid];
4672 else
4673 return -EINVAL;
4674
4675 IWL_WARNING("%s on da = %s tid = %d\n",
4676 __func__, print_mac(mac, da), tid);
4677
4678 sta_id = iwl4965_hw_find_station(priv, da);
4679 if (sta_id == IWL_INVALID_STATION)
4680 return -ENXIO;
4681
4682 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4683 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4684 return -ENXIO;
4685 }
4686
4687 txq_id = iwl4965_txq_ctx_activate_free(priv);
4688 if (txq_id == -1)
4689 return -ENXIO;
4690
4691 spin_lock_irqsave(&priv->sta_lock, flags);
4692 tid_data = &priv->stations[sta_id].tid[tid];
4693 ssn = SEQ_TO_SN(tid_data->seq_number);
4694 tid_data->agg.txq_id = txq_id;
4695 spin_unlock_irqrestore(&priv->sta_lock, flags);
4696
4697 *start_seq_num = ssn;
4698 ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4699 sta_id, tid, ssn);
4700 if (ret)
4701 return ret;
4702
4703 ret = 0;
4704 if (tid_data->tfds_in_queue == 0) {
4705 printk(KERN_ERR "HW queue is empty\n");
4706 tid_data->agg.state = IWL_AGG_ON;
4707 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4708 } else {
4709 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4710 tid_data->tfds_in_queue);
4711 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4712 }
4713 return ret;
4714 }
4715
4716 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4717 u16 tid)
4718 {
4719
4720 struct iwl_priv *priv = hw->priv;
4721 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4722 struct iwl4965_tid_data *tid_data;
4723 int ret, write_ptr, read_ptr;
4724 unsigned long flags;
4725 DECLARE_MAC_BUF(mac);
4726
4727 if (!da) {
4728 IWL_ERROR("da = NULL\n");
4729 return -EINVAL;
4730 }
4731
4732 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4733 tx_fifo_id = default_tid_to_tx_fifo[tid];
4734 else
4735 return -EINVAL;
4736
4737 sta_id = iwl4965_hw_find_station(priv, da);
4738
4739 if (sta_id == IWL_INVALID_STATION)
4740 return -ENXIO;
4741
4742 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4743 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4744
4745 tid_data = &priv->stations[sta_id].tid[tid];
4746 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4747 txq_id = tid_data->agg.txq_id;
4748 write_ptr = priv->txq[txq_id].q.write_ptr;
4749 read_ptr = priv->txq[txq_id].q.read_ptr;
4750
4751 /* The queue is not empty */
4752 if (write_ptr != read_ptr) {
4753 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4754 priv->stations[sta_id].tid[tid].agg.state =
4755 IWL_EMPTYING_HW_QUEUE_DELBA;
4756 return 0;
4757 }
4758
4759 IWL_DEBUG_HT("HW queue empty\n");;
4760 priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4761
4762 spin_lock_irqsave(&priv->lock, flags);
4763 ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4764 spin_unlock_irqrestore(&priv->lock, flags);
4765
4766 if (ret)
4767 return ret;
4768
4769 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4770
4771 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4772 print_mac(mac, da), tid);
4773
4774 return 0;
4775 }
4776
4777 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4778 enum ieee80211_ampdu_mlme_action action,
4779 const u8 *addr, u16 tid, u16 *ssn)
4780 {
4781 struct iwl_priv *priv = hw->priv;
4782 int sta_id;
4783 DECLARE_MAC_BUF(mac);
4784
4785 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4786 print_mac(mac, addr), tid);
4787 sta_id = iwl4965_hw_find_station(priv, addr);
4788 switch (action) {
4789 case IEEE80211_AMPDU_RX_START:
4790 IWL_DEBUG_HT("start Rx\n");
4791 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4792 break;
4793 case IEEE80211_AMPDU_RX_STOP:
4794 IWL_DEBUG_HT("stop Rx\n");
4795 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4796 break;
4797 case IEEE80211_AMPDU_TX_START:
4798 IWL_DEBUG_HT("start Tx\n");
4799 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4800 case IEEE80211_AMPDU_TX_STOP:
4801 IWL_DEBUG_HT("stop Tx\n");
4802 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4803 default:
4804 IWL_DEBUG_HT("unknown\n");
4805 return -EINVAL;
4806 break;
4807 }
4808 return 0;
4809 }
4810
4811 #endif /* CONFIG_IWL4965_HT */
4812
4813 /* Set up 4965-specific Rx frame reply handlers */
4814 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
4815 {
4816 /* Legacy Rx frames */
4817 priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4818
4819 /* High-throughput (HT) Rx frames */
4820 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4821 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4822
4823 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4824 iwl4965_rx_missed_beacon_notif;
4825
4826 #ifdef CONFIG_IWL4965_HT
4827 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4828 #endif /* CONFIG_IWL4965_HT */
4829 }
4830
4831 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
4832 {
4833 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4834 INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4835 #ifdef CONFIG_IWL4965_SENSITIVITY
4836 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4837 #endif
4838 init_timer(&priv->statistics_periodic);
4839 priv->statistics_periodic.data = (unsigned long)priv;
4840 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4841 }
4842
4843 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4844 {
4845 del_timer_sync(&priv->statistics_periodic);
4846
4847 cancel_delayed_work(&priv->init_alive_start);
4848 }
4849
4850 static struct iwl_lib_ops iwl4965_lib = {
4851 .eeprom_ops = {
4852 .verify_signature = iwlcore_eeprom_verify_signature,
4853 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4854 .release_semaphore = iwlcore_eeprom_release_semaphore,
4855 },
4856 };
4857
4858 static struct iwl_ops iwl4965_ops = {
4859 .lib = &iwl4965_lib,
4860 };
4861
4862 static struct iwl_cfg iwl4965_agn_cfg = {
4863 .name = "4965AGN",
4864 .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4865 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4866 .ops = &iwl4965_ops,
4867 };
4868
4869 struct pci_device_id iwl4965_hw_card_ids[] = {
4870 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4871 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4872 {0}
4873 };
4874
4875 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
Linus' kernel tree