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iwlwifi: Eliminate association from beacon
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-4965.c
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-io.h"
45 #include "iwl-helpers.h"
46
47 /* module parameters */
48 static struct iwl_mod_params iwl4965_mod_params = {
49 .num_of_queues = IWL_MAX_NUM_QUEUES,
50 .enable_qos = 1,
51 .amsdu_size_8K = 1,
52 /* the rest are 0 by default */
53 };
54
55 static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
56
57 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
58 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
59 IWL_RATE_SISO_##s##M_PLCP, \
60 IWL_RATE_MIMO_##s##M_PLCP, \
61 IWL_RATE_##r##M_IEEE, \
62 IWL_RATE_##ip##M_INDEX, \
63 IWL_RATE_##in##M_INDEX, \
64 IWL_RATE_##rp##M_INDEX, \
65 IWL_RATE_##rn##M_INDEX, \
66 IWL_RATE_##pp##M_INDEX, \
67 IWL_RATE_##np##M_INDEX }
68
69 /*
70 * Parameter order:
71 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
72 *
73 * If there isn't a valid next or previous rate then INV is used which
74 * maps to IWL_RATE_INVALID
75 *
76 */
77 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
78 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
79 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
80 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
81 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
82 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
83 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
84 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
85 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
86 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
87 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
88 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
89 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
90 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
91 };
92
93 #ifdef CONFIG_IWL4965_HT
94
95 static const u16 default_tid_to_tx_fifo[] = {
96 IWL_TX_FIFO_AC1,
97 IWL_TX_FIFO_AC0,
98 IWL_TX_FIFO_AC0,
99 IWL_TX_FIFO_AC1,
100 IWL_TX_FIFO_AC2,
101 IWL_TX_FIFO_AC2,
102 IWL_TX_FIFO_AC3,
103 IWL_TX_FIFO_AC3,
104 IWL_TX_FIFO_NONE,
105 IWL_TX_FIFO_NONE,
106 IWL_TX_FIFO_NONE,
107 IWL_TX_FIFO_NONE,
108 IWL_TX_FIFO_NONE,
109 IWL_TX_FIFO_NONE,
110 IWL_TX_FIFO_NONE,
111 IWL_TX_FIFO_NONE,
112 IWL_TX_FIFO_AC3
113 };
114
115 #endif /*CONFIG_IWL4965_HT */
116
117 static int iwl4965_init_drv(struct iwl_priv *priv)
118 {
119 int ret;
120 int i;
121
122 priv->antenna = (enum iwl4965_antenna)priv->cfg->mod_params->antenna;
123 priv->retry_rate = 1;
124 priv->ibss_beacon = NULL;
125
126 spin_lock_init(&priv->lock);
127 spin_lock_init(&priv->power_data.lock);
128 spin_lock_init(&priv->sta_lock);
129 spin_lock_init(&priv->hcmd_lock);
130 spin_lock_init(&priv->lq_mngr.lock);
131
132 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
133 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
134
135 INIT_LIST_HEAD(&priv->free_frames);
136
137 mutex_init(&priv->mutex);
138
139 /* Clear the driver's (not device's) station table */
140 iwlcore_clear_stations_table(priv);
141
142 priv->data_retry_limit = -1;
143 priv->ieee_channels = NULL;
144 priv->ieee_rates = NULL;
145 priv->band = IEEE80211_BAND_2GHZ;
146
147 priv->iw_mode = IEEE80211_IF_TYPE_STA;
148
149 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
150 priv->valid_antenna = 0x7; /* assume all 3 connected */
151 priv->ps_mode = IWL_MIMO_PS_NONE;
152
153 /* Choose which receivers/antennas to use */
154 iwl4965_set_rxon_chain(priv);
155
156 iwlcore_reset_qos(priv);
157
158 priv->qos_data.qos_active = 0;
159 priv->qos_data.qos_cap.val = 0;
160
161 iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
162
163 priv->rates_mask = IWL_RATES_MASK;
164 /* If power management is turned on, default to AC mode */
165 priv->power_mode = IWL_POWER_AC;
166 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
167
168 ret = iwl_init_channel_map(priv);
169 if (ret) {
170 IWL_ERROR("initializing regulatory failed: %d\n", ret);
171 goto err;
172 }
173
174 ret = iwl4965_init_geos(priv);
175 if (ret) {
176 IWL_ERROR("initializing geos failed: %d\n", ret);
177 goto err_free_channel_map;
178 }
179
180 ret = ieee80211_register_hw(priv->hw);
181 if (ret) {
182 IWL_ERROR("Failed to register network device (error %d)\n",
183 ret);
184 goto err_free_geos;
185 }
186
187 priv->hw->conf.beacon_int = 100;
188 priv->mac80211_registered = 1;
189
190 return 0;
191
192 err_free_geos:
193 iwl4965_free_geos(priv);
194 err_free_channel_map:
195 iwl_free_channel_map(priv);
196 err:
197 return ret;
198 }
199
200 static int is_fat_channel(__le32 rxon_flags)
201 {
202 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
203 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
204 }
205
206 static u8 is_single_stream(struct iwl_priv *priv)
207 {
208 #ifdef CONFIG_IWL4965_HT
209 if (!priv->current_ht_config.is_ht ||
210 (priv->current_ht_config.supp_mcs_set[1] == 0) ||
211 (priv->ps_mode == IWL_MIMO_PS_STATIC))
212 return 1;
213 #else
214 return 1;
215 #endif /*CONFIG_IWL4965_HT */
216 return 0;
217 }
218
219 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
220 {
221 int idx = 0;
222
223 /* 4965 HT rate format */
224 if (rate_n_flags & RATE_MCS_HT_MSK) {
225 idx = (rate_n_flags & 0xff);
226
227 if (idx >= IWL_RATE_MIMO_6M_PLCP)
228 idx = idx - IWL_RATE_MIMO_6M_PLCP;
229
230 idx += IWL_FIRST_OFDM_RATE;
231 /* skip 9M not supported in ht*/
232 if (idx >= IWL_RATE_9M_INDEX)
233 idx += 1;
234 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
235 return idx;
236
237 /* 4965 legacy rate format, search for match in table */
238 } else {
239 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
240 if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
241 return idx;
242 }
243
244 return -1;
245 }
246
247 /**
248 * translate ucode response to mac80211 tx status control values
249 */
250 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
251 struct ieee80211_tx_control *control)
252 {
253 int rate_index;
254
255 control->antenna_sel_tx =
256 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
257 if (rate_n_flags & RATE_MCS_HT_MSK)
258 control->flags |= IEEE80211_TXCTL_OFDM_HT;
259 if (rate_n_flags & RATE_MCS_GF_MSK)
260 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
261 if (rate_n_flags & RATE_MCS_FAT_MSK)
262 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
263 if (rate_n_flags & RATE_MCS_DUP_MSK)
264 control->flags |= IEEE80211_TXCTL_DUP_DATA;
265 if (rate_n_flags & RATE_MCS_SGI_MSK)
266 control->flags |= IEEE80211_TXCTL_SHORT_GI;
267 /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
268 * IEEE80211_BAND_2GHZ band as it contains all the rates */
269 rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
270 if (rate_index == -1)
271 control->tx_rate = NULL;
272 else
273 control->tx_rate =
274 &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
275 }
276
277 /*
278 * Determine how many receiver/antenna chains to use.
279 * More provides better reception via diversity. Fewer saves power.
280 * MIMO (dual stream) requires at least 2, but works better with 3.
281 * This does not determine *which* chains to use, just how many.
282 */
283 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
284 u8 *idle_state, u8 *rx_state)
285 {
286 u8 is_single = is_single_stream(priv);
287 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
288
289 /* # of Rx chains to use when expecting MIMO. */
290 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
291 *rx_state = 2;
292 else
293 *rx_state = 3;
294
295 /* # Rx chains when idling and maybe trying to save power */
296 switch (priv->ps_mode) {
297 case IWL_MIMO_PS_STATIC:
298 case IWL_MIMO_PS_DYNAMIC:
299 *idle_state = (is_cam) ? 2 : 1;
300 break;
301 case IWL_MIMO_PS_NONE:
302 *idle_state = (is_cam) ? *rx_state : 1;
303 break;
304 default:
305 *idle_state = 1;
306 break;
307 }
308
309 return 0;
310 }
311
312 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
313 {
314 int rc;
315 unsigned long flags;
316
317 spin_lock_irqsave(&priv->lock, flags);
318 rc = iwl_grab_nic_access(priv);
319 if (rc) {
320 spin_unlock_irqrestore(&priv->lock, flags);
321 return rc;
322 }
323
324 /* stop Rx DMA */
325 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
326 rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
327 (1 << 24), 1000);
328 if (rc < 0)
329 IWL_ERROR("Can't stop Rx DMA.\n");
330
331 iwl_release_nic_access(priv);
332 spin_unlock_irqrestore(&priv->lock, flags);
333
334 return 0;
335 }
336
337 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
338 {
339 int i;
340 int start = 0;
341 int ret = IWL_INVALID_STATION;
342 unsigned long flags;
343 DECLARE_MAC_BUF(mac);
344
345 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
346 (priv->iw_mode == IEEE80211_IF_TYPE_AP))
347 start = IWL_STA_ID;
348
349 if (is_broadcast_ether_addr(addr))
350 return priv->hw_setting.bcast_sta_id;
351
352 spin_lock_irqsave(&priv->sta_lock, flags);
353 for (i = start; i < priv->hw_setting.max_stations; i++)
354 if ((priv->stations[i].used) &&
355 (!compare_ether_addr
356 (priv->stations[i].sta.sta.addr, addr))) {
357 ret = i;
358 goto out;
359 }
360
361 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
362 print_mac(mac, addr), priv->num_stations);
363
364 out:
365 spin_unlock_irqrestore(&priv->sta_lock, flags);
366 return ret;
367 }
368
369 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
370 {
371 int ret;
372 unsigned long flags;
373
374 spin_lock_irqsave(&priv->lock, flags);
375 ret = iwl_grab_nic_access(priv);
376 if (ret) {
377 spin_unlock_irqrestore(&priv->lock, flags);
378 return ret;
379 }
380
381 if (!pwr_max) {
382 u32 val;
383
384 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
385 &val);
386
387 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
388 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
389 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
390 ~APMG_PS_CTRL_MSK_PWR_SRC);
391 } else
392 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
393 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
394 ~APMG_PS_CTRL_MSK_PWR_SRC);
395
396 iwl_release_nic_access(priv);
397 spin_unlock_irqrestore(&priv->lock, flags);
398
399 return ret;
400 }
401
402 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
403 {
404 int rc;
405 unsigned long flags;
406 unsigned int rb_size;
407
408 spin_lock_irqsave(&priv->lock, flags);
409 rc = iwl_grab_nic_access(priv);
410 if (rc) {
411 spin_unlock_irqrestore(&priv->lock, flags);
412 return rc;
413 }
414
415 if (priv->cfg->mod_params->amsdu_size_8K)
416 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
417 else
418 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
419
420 /* Stop Rx DMA */
421 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
422
423 /* Reset driver's Rx queue write index */
424 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
425
426 /* Tell device where to find RBD circular buffer in DRAM */
427 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
428 rxq->dma_addr >> 8);
429
430 /* Tell device where in DRAM to update its Rx status */
431 iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
432 (priv->hw_setting.shared_phys +
433 offsetof(struct iwl4965_shared, val0)) >> 4);
434
435 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
436 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
437 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
438 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
439 rb_size |
440 /*0x10 << 4 | */
441 (RX_QUEUE_SIZE_LOG <<
442 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
443
444 /*
445 * iwl_write32(priv,CSR_INT_COAL_REG,0);
446 */
447
448 iwl_release_nic_access(priv);
449 spin_unlock_irqrestore(&priv->lock, flags);
450
451 return 0;
452 }
453
454 /* Tell 4965 where to find the "keep warm" buffer */
455 static int iwl4965_kw_init(struct iwl_priv *priv)
456 {
457 unsigned long flags;
458 int rc;
459
460 spin_lock_irqsave(&priv->lock, flags);
461 rc = iwl_grab_nic_access(priv);
462 if (rc)
463 goto out;
464
465 iwl_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
466 priv->kw.dma_addr >> 4);
467 iwl_release_nic_access(priv);
468 out:
469 spin_unlock_irqrestore(&priv->lock, flags);
470 return rc;
471 }
472
473 static int iwl4965_kw_alloc(struct iwl_priv *priv)
474 {
475 struct pci_dev *dev = priv->pci_dev;
476 struct iwl4965_kw *kw = &priv->kw;
477
478 kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
479 kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
480 if (!kw->v_addr)
481 return -ENOMEM;
482
483 return 0;
484 }
485
486 /**
487 * iwl4965_kw_free - Free the "keep warm" buffer
488 */
489 static void iwl4965_kw_free(struct iwl_priv *priv)
490 {
491 struct pci_dev *dev = priv->pci_dev;
492 struct iwl4965_kw *kw = &priv->kw;
493
494 if (kw->v_addr) {
495 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
496 memset(kw, 0, sizeof(*kw));
497 }
498 }
499
500 /**
501 * iwl4965_txq_ctx_reset - Reset TX queue context
502 * Destroys all DMA structures and initialise them again
503 *
504 * @param priv
505 * @return error code
506 */
507 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
508 {
509 int rc = 0;
510 int txq_id, slots_num;
511 unsigned long flags;
512
513 iwl4965_kw_free(priv);
514
515 /* Free all tx/cmd queues and keep-warm buffer */
516 iwl4965_hw_txq_ctx_free(priv);
517
518 /* Alloc keep-warm buffer */
519 rc = iwl4965_kw_alloc(priv);
520 if (rc) {
521 IWL_ERROR("Keep Warm allocation failed");
522 goto error_kw;
523 }
524
525 spin_lock_irqsave(&priv->lock, flags);
526
527 rc = iwl_grab_nic_access(priv);
528 if (unlikely(rc)) {
529 IWL_ERROR("TX reset failed");
530 spin_unlock_irqrestore(&priv->lock, flags);
531 goto error_reset;
532 }
533
534 /* Turn off all Tx DMA channels */
535 iwl_write_prph(priv, KDR_SCD_TXFACT, 0);
536 iwl_release_nic_access(priv);
537 spin_unlock_irqrestore(&priv->lock, flags);
538
539 /* Tell 4965 where to find the keep-warm buffer */
540 rc = iwl4965_kw_init(priv);
541 if (rc) {
542 IWL_ERROR("kw_init failed\n");
543 goto error_reset;
544 }
545
546 /* Alloc and init all (default 16) Tx queues,
547 * including the command queue (#4) */
548 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
549 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
550 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
551 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
552 txq_id);
553 if (rc) {
554 IWL_ERROR("Tx %d queue init failed\n", txq_id);
555 goto error;
556 }
557 }
558
559 return rc;
560
561 error:
562 iwl4965_hw_txq_ctx_free(priv);
563 error_reset:
564 iwl4965_kw_free(priv);
565 error_kw:
566 return rc;
567 }
568
569 int iwl4965_hw_nic_init(struct iwl_priv *priv)
570 {
571 int rc;
572 unsigned long flags;
573 struct iwl4965_rx_queue *rxq = &priv->rxq;
574 u8 rev_id;
575 u32 val;
576 u8 val_link;
577
578 iwl4965_power_init_handle(priv);
579
580 /* nic_init */
581 spin_lock_irqsave(&priv->lock, flags);
582
583 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
584 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
585
586 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
587 rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
588 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
589 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
590 if (rc < 0) {
591 spin_unlock_irqrestore(&priv->lock, flags);
592 IWL_DEBUG_INFO("Failed to init the card\n");
593 return rc;
594 }
595
596 rc = iwl_grab_nic_access(priv);
597 if (rc) {
598 spin_unlock_irqrestore(&priv->lock, flags);
599 return rc;
600 }
601
602 iwl_read_prph(priv, APMG_CLK_CTRL_REG);
603
604 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
605 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
606 iwl_read_prph(priv, APMG_CLK_CTRL_REG);
607
608 udelay(20);
609
610 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
611 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
612
613 iwl_release_nic_access(priv);
614 iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
615 spin_unlock_irqrestore(&priv->lock, flags);
616
617 /* Determine HW type */
618 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
619 if (rc)
620 return rc;
621
622 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
623
624 iwl4965_nic_set_pwr_src(priv, 1);
625 spin_lock_irqsave(&priv->lock, flags);
626
627 if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
628 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
629 /* Enable No Snoop field */
630 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
631 val & ~(1 << 11));
632 }
633
634 spin_unlock_irqrestore(&priv->lock, flags);
635
636 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
637 IWL_ERROR("Older EEPROM detected! Aborting.\n");
638 return -EINVAL;
639 }
640
641 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
642
643 /* disable L1 entry -- workaround for pre-B1 */
644 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
645
646 spin_lock_irqsave(&priv->lock, flags);
647
648 /* set CSR_HW_CONFIG_REG for uCode use */
649
650 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
651 CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
652 CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
653 CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
654
655 rc = iwl_grab_nic_access(priv);
656 if (rc < 0) {
657 spin_unlock_irqrestore(&priv->lock, flags);
658 IWL_DEBUG_INFO("Failed to init the card\n");
659 return rc;
660 }
661
662 iwl_read_prph(priv, APMG_PS_CTRL_REG);
663 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
664 udelay(5);
665 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
666
667 iwl_release_nic_access(priv);
668 spin_unlock_irqrestore(&priv->lock, flags);
669
670 iwl4965_hw_card_show_info(priv);
671
672 /* end nic_init */
673
674 /* Allocate the RX queue, or reset if it is already allocated */
675 if (!rxq->bd) {
676 rc = iwl4965_rx_queue_alloc(priv);
677 if (rc) {
678 IWL_ERROR("Unable to initialize Rx queue\n");
679 return -ENOMEM;
680 }
681 } else
682 iwl4965_rx_queue_reset(priv, rxq);
683
684 iwl4965_rx_replenish(priv);
685
686 iwl4965_rx_init(priv, rxq);
687
688 spin_lock_irqsave(&priv->lock, flags);
689
690 rxq->need_update = 1;
691 iwl4965_rx_queue_update_write_ptr(priv, rxq);
692
693 spin_unlock_irqrestore(&priv->lock, flags);
694
695 /* Allocate and init all Tx and Command queues */
696 rc = iwl4965_txq_ctx_reset(priv);
697 if (rc)
698 return rc;
699
700 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
701 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
702
703 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
704 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
705
706 set_bit(STATUS_INIT, &priv->status);
707
708 return 0;
709 }
710
711 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
712 {
713 int rc = 0;
714 u32 reg_val;
715 unsigned long flags;
716
717 spin_lock_irqsave(&priv->lock, flags);
718
719 /* set stop master bit */
720 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
721
722 reg_val = iwl_read32(priv, CSR_GP_CNTRL);
723
724 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
725 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
726 IWL_DEBUG_INFO("Card in power save, master is already "
727 "stopped\n");
728 else {
729 rc = iwl_poll_bit(priv, CSR_RESET,
730 CSR_RESET_REG_FLAG_MASTER_DISABLED,
731 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
732 if (rc < 0) {
733 spin_unlock_irqrestore(&priv->lock, flags);
734 return rc;
735 }
736 }
737
738 spin_unlock_irqrestore(&priv->lock, flags);
739 IWL_DEBUG_INFO("stop master\n");
740
741 return rc;
742 }
743
744 /**
745 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
746 */
747 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
748 {
749
750 int txq_id;
751 unsigned long flags;
752
753 /* Stop each Tx DMA channel, and wait for it to be idle */
754 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
755 spin_lock_irqsave(&priv->lock, flags);
756 if (iwl_grab_nic_access(priv)) {
757 spin_unlock_irqrestore(&priv->lock, flags);
758 continue;
759 }
760
761 iwl_write_direct32(priv,
762 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
763 iwl_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
764 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
765 (txq_id), 200);
766 iwl_release_nic_access(priv);
767 spin_unlock_irqrestore(&priv->lock, flags);
768 }
769
770 /* Deallocate memory for all Tx queues */
771 iwl4965_hw_txq_ctx_free(priv);
772 }
773
774 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
775 {
776 int rc = 0;
777 unsigned long flags;
778
779 iwl4965_hw_nic_stop_master(priv);
780
781 spin_lock_irqsave(&priv->lock, flags);
782
783 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
784
785 udelay(10);
786
787 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
788 rc = iwl_poll_bit(priv, CSR_RESET,
789 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
790 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
791
792 udelay(10);
793
794 rc = iwl_grab_nic_access(priv);
795 if (!rc) {
796 iwl_write_prph(priv, APMG_CLK_EN_REG,
797 APMG_CLK_VAL_DMA_CLK_RQT |
798 APMG_CLK_VAL_BSM_CLK_RQT);
799
800 udelay(10);
801
802 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
803 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
804
805 iwl_release_nic_access(priv);
806 }
807
808 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
809 wake_up_interruptible(&priv->wait_command_queue);
810
811 spin_unlock_irqrestore(&priv->lock, flags);
812
813 return rc;
814
815 }
816
817 #define REG_RECALIB_PERIOD (60)
818
819 /**
820 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
821 *
822 * This callback is provided in order to queue the statistics_work
823 * in work_queue context (v. softirq)
824 *
825 * This timer function is continually reset to execute within
826 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
827 * was received. We need to ensure we receive the statistics in order
828 * to update the temperature used for calibrating the TXPOWER. However,
829 * we can't send the statistics command from softirq context (which
830 * is the context which timers run at) so we have to queue off the
831 * statistics_work to actually send the command to the hardware.
832 */
833 static void iwl4965_bg_statistics_periodic(unsigned long data)
834 {
835 struct iwl_priv *priv = (struct iwl_priv *)data;
836
837 queue_work(priv->workqueue, &priv->statistics_work);
838 }
839
840 /**
841 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
842 *
843 * This is queued by iwl4965_bg_statistics_periodic.
844 */
845 static void iwl4965_bg_statistics_work(struct work_struct *work)
846 {
847 struct iwl_priv *priv = container_of(work, struct iwl_priv,
848 statistics_work);
849
850 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
851 return;
852
853 mutex_lock(&priv->mutex);
854 iwl4965_send_statistics_request(priv);
855 mutex_unlock(&priv->mutex);
856 }
857
858 #define CT_LIMIT_CONST 259
859 #define TM_CT_KILL_THRESHOLD 110
860
861 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
862 {
863 struct iwl4965_ct_kill_config cmd;
864 u32 R1, R2, R3;
865 u32 temp_th;
866 u32 crit_temperature;
867 unsigned long flags;
868 int ret = 0;
869
870 spin_lock_irqsave(&priv->lock, flags);
871 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
872 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
873 spin_unlock_irqrestore(&priv->lock, flags);
874
875 if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
876 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
877 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
878 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
879 } else {
880 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
881 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
882 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
883 }
884
885 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
886
887 crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
888 cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
889 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
890 sizeof(cmd), &cmd);
891 if (ret)
892 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
893 else
894 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
895 }
896
897 #ifdef CONFIG_IWL4965_SENSITIVITY
898
899 /* "false alarms" are signals that our DSP tries to lock onto,
900 * but then determines that they are either noise, or transmissions
901 * from a distant wireless network (also "noise", really) that get
902 * "stepped on" by stronger transmissions within our own network.
903 * This algorithm attempts to set a sensitivity level that is high
904 * enough to receive all of our own network traffic, but not so
905 * high that our DSP gets too busy trying to lock onto non-network
906 * activity/noise. */
907 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
908 u32 norm_fa,
909 u32 rx_enable_time,
910 struct statistics_general_data *rx_info)
911 {
912 u32 max_nrg_cck = 0;
913 int i = 0;
914 u8 max_silence_rssi = 0;
915 u32 silence_ref = 0;
916 u8 silence_rssi_a = 0;
917 u8 silence_rssi_b = 0;
918 u8 silence_rssi_c = 0;
919 u32 val;
920
921 /* "false_alarms" values below are cross-multiplications to assess the
922 * numbers of false alarms within the measured period of actual Rx
923 * (Rx is off when we're txing), vs the min/max expected false alarms
924 * (some should be expected if rx is sensitive enough) in a
925 * hypothetical listening period of 200 time units (TU), 204.8 msec:
926 *
927 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
928 *
929 * */
930 u32 false_alarms = norm_fa * 200 * 1024;
931 u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
932 u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
933 struct iwl4965_sensitivity_data *data = NULL;
934
935 data = &(priv->sensitivity_data);
936
937 data->nrg_auto_corr_silence_diff = 0;
938
939 /* Find max silence rssi among all 3 receivers.
940 * This is background noise, which may include transmissions from other
941 * networks, measured during silence before our network's beacon */
942 silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
943 ALL_BAND_FILTER) >> 8);
944 silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
945 ALL_BAND_FILTER) >> 8);
946 silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
947 ALL_BAND_FILTER) >> 8);
948
949 val = max(silence_rssi_b, silence_rssi_c);
950 max_silence_rssi = max(silence_rssi_a, (u8) val);
951
952 /* Store silence rssi in 20-beacon history table */
953 data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
954 data->nrg_silence_idx++;
955 if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
956 data->nrg_silence_idx = 0;
957
958 /* Find max silence rssi across 20 beacon history */
959 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
960 val = data->nrg_silence_rssi[i];
961 silence_ref = max(silence_ref, val);
962 }
963 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
964 silence_rssi_a, silence_rssi_b, silence_rssi_c,
965 silence_ref);
966
967 /* Find max rx energy (min value!) among all 3 receivers,
968 * measured during beacon frame.
969 * Save it in 10-beacon history table. */
970 i = data->nrg_energy_idx;
971 val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
972 data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
973
974 data->nrg_energy_idx++;
975 if (data->nrg_energy_idx >= 10)
976 data->nrg_energy_idx = 0;
977
978 /* Find min rx energy (max value) across 10 beacon history.
979 * This is the minimum signal level that we want to receive well.
980 * Add backoff (margin so we don't miss slightly lower energy frames).
981 * This establishes an upper bound (min value) for energy threshold. */
982 max_nrg_cck = data->nrg_value[0];
983 for (i = 1; i < 10; i++)
984 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
985 max_nrg_cck += 6;
986
987 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
988 rx_info->beacon_energy_a, rx_info->beacon_energy_b,
989 rx_info->beacon_energy_c, max_nrg_cck - 6);
990
991 /* Count number of consecutive beacons with fewer-than-desired
992 * false alarms. */
993 if (false_alarms < min_false_alarms)
994 data->num_in_cck_no_fa++;
995 else
996 data->num_in_cck_no_fa = 0;
997 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
998 data->num_in_cck_no_fa);
999
1000 /* If we got too many false alarms this time, reduce sensitivity */
1001 if (false_alarms > max_false_alarms) {
1002 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
1003 false_alarms, max_false_alarms);
1004 IWL_DEBUG_CALIB("... reducing sensitivity\n");
1005 data->nrg_curr_state = IWL_FA_TOO_MANY;
1006
1007 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
1008 /* Store for "fewer than desired" on later beacon */
1009 data->nrg_silence_ref = silence_ref;
1010
1011 /* increase energy threshold (reduce nrg value)
1012 * to decrease sensitivity */
1013 if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
1014 data->nrg_th_cck = data->nrg_th_cck
1015 - NRG_STEP_CCK;
1016 }
1017
1018 /* increase auto_corr values to decrease sensitivity */
1019 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
1020 data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
1021 else {
1022 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
1023 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
1024 }
1025 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
1026 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
1027
1028 /* Else if we got fewer than desired, increase sensitivity */
1029 } else if (false_alarms < min_false_alarms) {
1030 data->nrg_curr_state = IWL_FA_TOO_FEW;
1031
1032 /* Compare silence level with silence level for most recent
1033 * healthy number or too many false alarms */
1034 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
1035 (s32)silence_ref;
1036
1037 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
1038 false_alarms, min_false_alarms,
1039 data->nrg_auto_corr_silence_diff);
1040
1041 /* Increase value to increase sensitivity, but only if:
1042 * 1a) previous beacon did *not* have *too many* false alarms
1043 * 1b) AND there's a significant difference in Rx levels
1044 * from a previous beacon with too many, or healthy # FAs
1045 * OR 2) We've seen a lot of beacons (100) with too few
1046 * false alarms */
1047 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1048 ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1049 (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1050
1051 IWL_DEBUG_CALIB("... increasing sensitivity\n");
1052 /* Increase nrg value to increase sensitivity */
1053 val = data->nrg_th_cck + NRG_STEP_CCK;
1054 data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1055
1056 /* Decrease auto_corr values to increase sensitivity */
1057 val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1058 data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1059
1060 val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1061 data->auto_corr_cck_mrc =
1062 max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1063
1064 } else
1065 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1066
1067 /* Else we got a healthy number of false alarms, keep status quo */
1068 } else {
1069 IWL_DEBUG_CALIB(" FA in safe zone\n");
1070 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1071
1072 /* Store for use in "fewer than desired" with later beacon */
1073 data->nrg_silence_ref = silence_ref;
1074
1075 /* If previous beacon had too many false alarms,
1076 * give it some extra margin by reducing sensitivity again
1077 * (but don't go below measured energy of desired Rx) */
1078 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1079 IWL_DEBUG_CALIB("... increasing margin\n");
1080 data->nrg_th_cck -= NRG_MARGIN;
1081 }
1082 }
1083
1084 /* Make sure the energy threshold does not go above the measured
1085 * energy of the desired Rx signals (reduced by backoff margin),
1086 * or else we might start missing Rx frames.
1087 * Lower value is higher energy, so we use max()!
1088 */
1089 data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1090 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1091
1092 data->nrg_prev_state = data->nrg_curr_state;
1093
1094 return 0;
1095 }
1096
1097
1098 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1099 u32 norm_fa,
1100 u32 rx_enable_time)
1101 {
1102 u32 val;
1103 u32 false_alarms = norm_fa * 200 * 1024;
1104 u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1105 u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1106 struct iwl4965_sensitivity_data *data = NULL;
1107
1108 data = &(priv->sensitivity_data);
1109
1110 /* If we got too many false alarms this time, reduce sensitivity */
1111 if (false_alarms > max_false_alarms) {
1112
1113 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1114 false_alarms, max_false_alarms);
1115
1116 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1117 data->auto_corr_ofdm =
1118 min((u32)AUTO_CORR_MAX_OFDM, val);
1119
1120 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1121 data->auto_corr_ofdm_mrc =
1122 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1123
1124 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1125 data->auto_corr_ofdm_x1 =
1126 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1127
1128 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1129 data->auto_corr_ofdm_mrc_x1 =
1130 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1131 }
1132
1133 /* Else if we got fewer than desired, increase sensitivity */
1134 else if (false_alarms < min_false_alarms) {
1135
1136 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1137 false_alarms, min_false_alarms);
1138
1139 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1140 data->auto_corr_ofdm =
1141 max((u32)AUTO_CORR_MIN_OFDM, val);
1142
1143 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1144 data->auto_corr_ofdm_mrc =
1145 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1146
1147 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1148 data->auto_corr_ofdm_x1 =
1149 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1150
1151 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1152 data->auto_corr_ofdm_mrc_x1 =
1153 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1154 }
1155
1156 else
1157 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1158 min_false_alarms, false_alarms, max_false_alarms);
1159
1160 return 0;
1161 }
1162
1163 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1164 struct iwl_cmd *cmd, struct sk_buff *skb)
1165 {
1166 /* We didn't cache the SKB; let the caller free it */
1167 return 1;
1168 }
1169
1170 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1171 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1172 {
1173 struct iwl4965_sensitivity_cmd cmd ;
1174 struct iwl4965_sensitivity_data *data = NULL;
1175 struct iwl_host_cmd cmd_out = {
1176 .id = SENSITIVITY_CMD,
1177 .len = sizeof(struct iwl4965_sensitivity_cmd),
1178 .meta.flags = flags,
1179 .data = &cmd,
1180 };
1181 int ret;
1182
1183 data = &(priv->sensitivity_data);
1184
1185 memset(&cmd, 0, sizeof(cmd));
1186
1187 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1188 cpu_to_le16((u16)data->auto_corr_ofdm);
1189 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1190 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1191 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1192 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1193 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1194 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1195
1196 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1197 cpu_to_le16((u16)data->auto_corr_cck);
1198 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1199 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1200
1201 cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1202 cpu_to_le16((u16)data->nrg_th_cck);
1203 cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1204 cpu_to_le16((u16)data->nrg_th_ofdm);
1205
1206 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1207 __constant_cpu_to_le16(190);
1208 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1209 __constant_cpu_to_le16(390);
1210 cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1211 __constant_cpu_to_le16(62);
1212
1213 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1214 data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1215 data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1216 data->nrg_th_ofdm);
1217
1218 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1219 data->auto_corr_cck, data->auto_corr_cck_mrc,
1220 data->nrg_th_cck);
1221
1222 /* Update uCode's "work" table, and copy it to DSP */
1223 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1224
1225 if (flags & CMD_ASYNC)
1226 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1227
1228 /* Don't send command to uCode if nothing has changed */
1229 if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1230 sizeof(u16)*HD_TABLE_SIZE)) {
1231 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1232 return 0;
1233 }
1234
1235 /* Copy table for comparison next time */
1236 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1237 sizeof(u16)*HD_TABLE_SIZE);
1238
1239 ret = iwl_send_cmd(priv, &cmd_out);
1240 if (ret)
1241 IWL_ERROR("SENSITIVITY_CMD failed\n");
1242
1243 return ret;
1244 }
1245
1246 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1247 {
1248 struct iwl4965_sensitivity_data *data = NULL;
1249 int i;
1250 int ret = 0;
1251
1252 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1253
1254 if (force)
1255 memset(&(priv->sensitivity_tbl[0]), 0,
1256 sizeof(u16)*HD_TABLE_SIZE);
1257
1258 /* Clear driver's sensitivity algo data */
1259 data = &(priv->sensitivity_data);
1260 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1261
1262 data->num_in_cck_no_fa = 0;
1263 data->nrg_curr_state = IWL_FA_TOO_MANY;
1264 data->nrg_prev_state = IWL_FA_TOO_MANY;
1265 data->nrg_silence_ref = 0;
1266 data->nrg_silence_idx = 0;
1267 data->nrg_energy_idx = 0;
1268
1269 for (i = 0; i < 10; i++)
1270 data->nrg_value[i] = 0;
1271
1272 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1273 data->nrg_silence_rssi[i] = 0;
1274
1275 data->auto_corr_ofdm = 90;
1276 data->auto_corr_ofdm_mrc = 170;
1277 data->auto_corr_ofdm_x1 = 105;
1278 data->auto_corr_ofdm_mrc_x1 = 220;
1279 data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1280 data->auto_corr_cck_mrc = 200;
1281 data->nrg_th_cck = 100;
1282 data->nrg_th_ofdm = 100;
1283
1284 data->last_bad_plcp_cnt_ofdm = 0;
1285 data->last_fa_cnt_ofdm = 0;
1286 data->last_bad_plcp_cnt_cck = 0;
1287 data->last_fa_cnt_cck = 0;
1288
1289 /* Clear prior Sensitivity command data to force send to uCode */
1290 if (force)
1291 memset(&(priv->sensitivity_tbl[0]), 0,
1292 sizeof(u16)*HD_TABLE_SIZE);
1293
1294 ret |= iwl4965_sensitivity_write(priv, flags);
1295 IWL_DEBUG_CALIB("<<return 0x%X\n", ret);
1296
1297 return;
1298 }
1299
1300
1301 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1302 * Called after every association, but this runs only once!
1303 * ... once chain noise is calibrated the first time, it's good forever. */
1304 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1305 {
1306 struct iwl4965_chain_noise_data *data = NULL;
1307
1308 data = &(priv->chain_noise_data);
1309 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
1310 struct iwl4965_calibration_cmd cmd;
1311
1312 memset(&cmd, 0, sizeof(cmd));
1313 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1314 cmd.diff_gain_a = 0;
1315 cmd.diff_gain_b = 0;
1316 cmd.diff_gain_c = 0;
1317 iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
1318 sizeof(cmd), &cmd, NULL);
1319 msleep(4);
1320 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1321 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1322 }
1323 return;
1324 }
1325
1326 /*
1327 * Accumulate 20 beacons of signal and noise statistics for each of
1328 * 3 receivers/antennas/rx-chains, then figure out:
1329 * 1) Which antennas are connected.
1330 * 2) Differential rx gain settings to balance the 3 receivers.
1331 */
1332 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1333 struct iwl4965_notif_statistics *stat_resp)
1334 {
1335 struct iwl4965_chain_noise_data *data = NULL;
1336 int ret = 0;
1337
1338 u32 chain_noise_a;
1339 u32 chain_noise_b;
1340 u32 chain_noise_c;
1341 u32 chain_sig_a;
1342 u32 chain_sig_b;
1343 u32 chain_sig_c;
1344 u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1345 u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1346 u32 max_average_sig;
1347 u16 max_average_sig_antenna_i;
1348 u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1349 u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1350 u16 i = 0;
1351 u16 chan_num = INITIALIZATION_VALUE;
1352 u32 band = INITIALIZATION_VALUE;
1353 u32 active_chains = 0;
1354 unsigned long flags;
1355 struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1356
1357 data = &(priv->chain_noise_data);
1358
1359 /* Accumulate just the first 20 beacons after the first association,
1360 * then we're done forever. */
1361 if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1362 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1363 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1364 return;
1365 }
1366
1367 spin_lock_irqsave(&priv->lock, flags);
1368 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1369 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1370 spin_unlock_irqrestore(&priv->lock, flags);
1371 return;
1372 }
1373
1374 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1375 chan_num = le16_to_cpu(priv->staging_rxon.channel);
1376
1377 /* Make sure we accumulate data for just the associated channel
1378 * (even if scanning). */
1379 if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1380 ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1381 (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1382 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1383 chan_num, band);
1384 spin_unlock_irqrestore(&priv->lock, flags);
1385 return;
1386 }
1387
1388 /* Accumulate beacon statistics values across 20 beacons */
1389 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1390 IN_BAND_FILTER;
1391 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1392 IN_BAND_FILTER;
1393 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1394 IN_BAND_FILTER;
1395
1396 chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1397 chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1398 chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1399
1400 spin_unlock_irqrestore(&priv->lock, flags);
1401
1402 data->beacon_count++;
1403
1404 data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1405 data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1406 data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1407
1408 data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1409 data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1410 data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1411
1412 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1413 data->beacon_count);
1414 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1415 chain_sig_a, chain_sig_b, chain_sig_c);
1416 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1417 chain_noise_a, chain_noise_b, chain_noise_c);
1418
1419 /* If this is the 20th beacon, determine:
1420 * 1) Disconnected antennas (using signal strengths)
1421 * 2) Differential gain (using silence noise) to balance receivers */
1422 if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1423
1424 /* Analyze signal for disconnected antenna */
1425 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1426 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1427 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1428
1429 if (average_sig[0] >= average_sig[1]) {
1430 max_average_sig = average_sig[0];
1431 max_average_sig_antenna_i = 0;
1432 active_chains = (1 << max_average_sig_antenna_i);
1433 } else {
1434 max_average_sig = average_sig[1];
1435 max_average_sig_antenna_i = 1;
1436 active_chains = (1 << max_average_sig_antenna_i);
1437 }
1438
1439 if (average_sig[2] >= max_average_sig) {
1440 max_average_sig = average_sig[2];
1441 max_average_sig_antenna_i = 2;
1442 active_chains = (1 << max_average_sig_antenna_i);
1443 }
1444
1445 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1446 average_sig[0], average_sig[1], average_sig[2]);
1447 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1448 max_average_sig, max_average_sig_antenna_i);
1449
1450 /* Compare signal strengths for all 3 receivers. */
1451 for (i = 0; i < NUM_RX_CHAINS; i++) {
1452 if (i != max_average_sig_antenna_i) {
1453 s32 rssi_delta = (max_average_sig -
1454 average_sig[i]);
1455
1456 /* If signal is very weak, compared with
1457 * strongest, mark it as disconnected. */
1458 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1459 data->disconn_array[i] = 1;
1460 else
1461 active_chains |= (1 << i);
1462 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1463 "disconn_array[i] = %d\n",
1464 i, rssi_delta, data->disconn_array[i]);
1465 }
1466 }
1467
1468 /*If both chains A & B are disconnected -
1469 * connect B and leave A as is */
1470 if (data->disconn_array[CHAIN_A] &&
1471 data->disconn_array[CHAIN_B]) {
1472 data->disconn_array[CHAIN_B] = 0;
1473 active_chains |= (1 << CHAIN_B);
1474 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1475 "W/A - declare B as connected\n");
1476 }
1477
1478 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1479 active_chains);
1480
1481 /* Save for use within RXON, TX, SCAN commands, etc. */
1482 priv->valid_antenna = active_chains;
1483
1484 /* Analyze noise for rx balance */
1485 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1486 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1487 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1488
1489 for (i = 0; i < NUM_RX_CHAINS; i++) {
1490 if (!(data->disconn_array[i]) &&
1491 (average_noise[i] <= min_average_noise)) {
1492 /* This means that chain i is active and has
1493 * lower noise values so far: */
1494 min_average_noise = average_noise[i];
1495 min_average_noise_antenna_i = i;
1496 }
1497 }
1498
1499 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1500
1501 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1502 average_noise[0], average_noise[1],
1503 average_noise[2]);
1504
1505 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1506 min_average_noise, min_average_noise_antenna_i);
1507
1508 for (i = 0; i < NUM_RX_CHAINS; i++) {
1509 s32 delta_g = 0;
1510
1511 if (!(data->disconn_array[i]) &&
1512 (data->delta_gain_code[i] ==
1513 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1514 delta_g = average_noise[i] - min_average_noise;
1515 data->delta_gain_code[i] = (u8)((delta_g *
1516 10) / 15);
1517 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1518 data->delta_gain_code[i])
1519 data->delta_gain_code[i] =
1520 CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1521
1522 data->delta_gain_code[i] =
1523 (data->delta_gain_code[i] | (1 << 2));
1524 } else
1525 data->delta_gain_code[i] = 0;
1526 }
1527 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1528 data->delta_gain_code[0],
1529 data->delta_gain_code[1],
1530 data->delta_gain_code[2]);
1531
1532 /* Differential gain gets sent to uCode only once */
1533 if (!data->radio_write) {
1534 struct iwl4965_calibration_cmd cmd;
1535 data->radio_write = 1;
1536
1537 memset(&cmd, 0, sizeof(cmd));
1538 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1539 cmd.diff_gain_a = data->delta_gain_code[0];
1540 cmd.diff_gain_b = data->delta_gain_code[1];
1541 cmd.diff_gain_c = data->delta_gain_code[2];
1542 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1543 sizeof(cmd), &cmd);
1544 if (ret)
1545 IWL_DEBUG_CALIB("fail sending cmd "
1546 "REPLY_PHY_CALIBRATION_CMD \n");
1547
1548 /* TODO we might want recalculate
1549 * rx_chain in rxon cmd */
1550
1551 /* Mark so we run this algo only once! */
1552 data->state = IWL_CHAIN_NOISE_CALIBRATED;
1553 }
1554 data->chain_noise_a = 0;
1555 data->chain_noise_b = 0;
1556 data->chain_noise_c = 0;
1557 data->chain_signal_a = 0;
1558 data->chain_signal_b = 0;
1559 data->chain_signal_c = 0;
1560 data->beacon_count = 0;
1561 }
1562 return;
1563 }
1564
1565 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1566 struct iwl4965_notif_statistics *resp)
1567 {
1568 u32 rx_enable_time;
1569 u32 fa_cck;
1570 u32 fa_ofdm;
1571 u32 bad_plcp_cck;
1572 u32 bad_plcp_ofdm;
1573 u32 norm_fa_ofdm;
1574 u32 norm_fa_cck;
1575 struct iwl4965_sensitivity_data *data = NULL;
1576 struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1577 struct statistics_rx *statistics = &(resp->rx);
1578 unsigned long flags;
1579 struct statistics_general_data statis;
1580 int ret;
1581
1582 data = &(priv->sensitivity_data);
1583
1584 if (!iwl_is_associated(priv)) {
1585 IWL_DEBUG_CALIB("<< - not associated\n");
1586 return;
1587 }
1588
1589 spin_lock_irqsave(&priv->lock, flags);
1590 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1591 IWL_DEBUG_CALIB("<< invalid data.\n");
1592 spin_unlock_irqrestore(&priv->lock, flags);
1593 return;
1594 }
1595
1596 /* Extract Statistics: */
1597 rx_enable_time = le32_to_cpu(rx_info->channel_load);
1598 fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1599 fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1600 bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1601 bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1602
1603 statis.beacon_silence_rssi_a =
1604 le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1605 statis.beacon_silence_rssi_b =
1606 le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1607 statis.beacon_silence_rssi_c =
1608 le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1609 statis.beacon_energy_a =
1610 le32_to_cpu(statistics->general.beacon_energy_a);
1611 statis.beacon_energy_b =
1612 le32_to_cpu(statistics->general.beacon_energy_b);
1613 statis.beacon_energy_c =
1614 le32_to_cpu(statistics->general.beacon_energy_c);
1615
1616 spin_unlock_irqrestore(&priv->lock, flags);
1617
1618 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1619
1620 if (!rx_enable_time) {
1621 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1622 return;
1623 }
1624
1625 /* These statistics increase monotonically, and do not reset
1626 * at each beacon. Calculate difference from last value, or just
1627 * use the new statistics value if it has reset or wrapped around. */
1628 if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1629 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1630 else {
1631 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1632 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1633 }
1634
1635 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1636 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1637 else {
1638 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1639 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1640 }
1641
1642 if (data->last_fa_cnt_ofdm > fa_ofdm)
1643 data->last_fa_cnt_ofdm = fa_ofdm;
1644 else {
1645 fa_ofdm -= data->last_fa_cnt_ofdm;
1646 data->last_fa_cnt_ofdm += fa_ofdm;
1647 }
1648
1649 if (data->last_fa_cnt_cck > fa_cck)
1650 data->last_fa_cnt_cck = fa_cck;
1651 else {
1652 fa_cck -= data->last_fa_cnt_cck;
1653 data->last_fa_cnt_cck += fa_cck;
1654 }
1655
1656 /* Total aborted signal locks */
1657 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1658 norm_fa_cck = fa_cck + bad_plcp_cck;
1659
1660 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
1661 bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1662
1663 iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1664 iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1665 ret = iwl4965_sensitivity_write(priv, CMD_ASYNC);
1666
1667 return;
1668 }
1669
1670 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1671 {
1672 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1673 sensitivity_work);
1674
1675 mutex_lock(&priv->mutex);
1676
1677 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1678 test_bit(STATUS_SCANNING, &priv->status)) {
1679 mutex_unlock(&priv->mutex);
1680 return;
1681 }
1682
1683 if (priv->start_calib) {
1684 iwl4965_noise_calibration(priv, &priv->statistics);
1685
1686 if (priv->sensitivity_data.state ==
1687 IWL_SENS_CALIB_NEED_REINIT) {
1688 iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1689 priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1690 } else
1691 iwl4965_sensitivity_calibration(priv,
1692 &priv->statistics);
1693 }
1694
1695 mutex_unlock(&priv->mutex);
1696 return;
1697 }
1698 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1699
1700 static void iwl4965_bg_txpower_work(struct work_struct *work)
1701 {
1702 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1703 txpower_work);
1704
1705 /* If a scan happened to start before we got here
1706 * then just return; the statistics notification will
1707 * kick off another scheduled work to compensate for
1708 * any temperature delta we missed here. */
1709 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1710 test_bit(STATUS_SCANNING, &priv->status))
1711 return;
1712
1713 mutex_lock(&priv->mutex);
1714
1715 /* Regardless of if we are assocaited, we must reconfigure the
1716 * TX power since frames can be sent on non-radar channels while
1717 * not associated */
1718 iwl4965_hw_reg_send_txpower(priv);
1719
1720 /* Update last_temperature to keep is_calib_needed from running
1721 * when it isn't needed... */
1722 priv->last_temperature = priv->temperature;
1723
1724 mutex_unlock(&priv->mutex);
1725 }
1726
1727 /*
1728 * Acquire priv->lock before calling this function !
1729 */
1730 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1731 {
1732 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
1733 (index & 0xff) | (txq_id << 8));
1734 iwl_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1735 }
1736
1737 /**
1738 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1739 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1740 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1741 *
1742 * NOTE: Acquire priv->lock before calling this function !
1743 */
1744 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1745 struct iwl4965_tx_queue *txq,
1746 int tx_fifo_id, int scd_retry)
1747 {
1748 int txq_id = txq->q.id;
1749
1750 /* Find out whether to activate Tx queue */
1751 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1752
1753 /* Set up and activate */
1754 iwl_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1755 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1756 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1757 (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1758 (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1759 SCD_QUEUE_STTS_REG_MSK);
1760
1761 txq->sched_retry = scd_retry;
1762
1763 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1764 active ? "Activate" : "Deactivate",
1765 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1766 }
1767
1768 static const u16 default_queue_to_tx_fifo[] = {
1769 IWL_TX_FIFO_AC3,
1770 IWL_TX_FIFO_AC2,
1771 IWL_TX_FIFO_AC1,
1772 IWL_TX_FIFO_AC0,
1773 IWL_CMD_FIFO_NUM,
1774 IWL_TX_FIFO_HCCA_1,
1775 IWL_TX_FIFO_HCCA_2
1776 };
1777
1778 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1779 {
1780 set_bit(txq_id, &priv->txq_ctx_active_msk);
1781 }
1782
1783 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1784 {
1785 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1786 }
1787
1788 int iwl4965_alive_notify(struct iwl_priv *priv)
1789 {
1790 u32 a;
1791 int i = 0;
1792 unsigned long flags;
1793 int ret;
1794
1795 spin_lock_irqsave(&priv->lock, flags);
1796
1797 #ifdef CONFIG_IWL4965_SENSITIVITY
1798 memset(&(priv->sensitivity_data), 0,
1799 sizeof(struct iwl4965_sensitivity_data));
1800 memset(&(priv->chain_noise_data), 0,
1801 sizeof(struct iwl4965_chain_noise_data));
1802 for (i = 0; i < NUM_RX_CHAINS; i++)
1803 priv->chain_noise_data.delta_gain_code[i] =
1804 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1805 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1806 ret = iwl_grab_nic_access(priv);
1807 if (ret) {
1808 spin_unlock_irqrestore(&priv->lock, flags);
1809 return ret;
1810 }
1811
1812 /* Clear 4965's internal Tx Scheduler data base */
1813 priv->scd_base_addr = iwl_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1814 a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1815 for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1816 iwl_write_targ_mem(priv, a, 0);
1817 for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1818 iwl_write_targ_mem(priv, a, 0);
1819 for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1820 iwl_write_targ_mem(priv, a, 0);
1821
1822 /* Tel 4965 where to find Tx byte count tables */
1823 iwl_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1824 (priv->hw_setting.shared_phys +
1825 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1826
1827 /* Disable chain mode for all queues */
1828 iwl_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1829
1830 /* Initialize each Tx queue (including the command queue) */
1831 for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1832
1833 /* TFD circular buffer read/write indexes */
1834 iwl_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1835 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1836
1837 /* Max Tx Window size for Scheduler-ACK mode */
1838 iwl_write_targ_mem(priv, priv->scd_base_addr +
1839 SCD_CONTEXT_QUEUE_OFFSET(i),
1840 (SCD_WIN_SIZE <<
1841 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1842 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1843
1844 /* Frame limit */
1845 iwl_write_targ_mem(priv, priv->scd_base_addr +
1846 SCD_CONTEXT_QUEUE_OFFSET(i) +
1847 sizeof(u32),
1848 (SCD_FRAME_LIMIT <<
1849 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1850 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1851
1852 }
1853 iwl_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1854 (1 << priv->hw_setting.max_txq_num) - 1);
1855
1856 /* Activate all Tx DMA/FIFO channels */
1857 iwl_write_prph(priv, KDR_SCD_TXFACT,
1858 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1859
1860 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1861
1862 /* Map each Tx/cmd queue to its corresponding fifo */
1863 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1864 int ac = default_queue_to_tx_fifo[i];
1865 iwl4965_txq_ctx_activate(priv, i);
1866 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1867 }
1868
1869 iwl_release_nic_access(priv);
1870 spin_unlock_irqrestore(&priv->lock, flags);
1871
1872 return ret;
1873 }
1874
1875 /**
1876 * iwl4965_hw_set_hw_setting
1877 *
1878 * Called when initializing driver
1879 */
1880 int iwl4965_hw_set_hw_setting(struct iwl_priv *priv)
1881 {
1882 int ret = 0;
1883
1884 if ((priv->cfg->mod_params->num_of_queues > IWL_MAX_NUM_QUEUES) ||
1885 (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
1886 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1887 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
1888 ret = -EINVAL;
1889 goto out;
1890 }
1891
1892 /* Allocate area for Tx byte count tables and Rx queue status */
1893 priv->hw_setting.shared_virt =
1894 pci_alloc_consistent(priv->pci_dev,
1895 sizeof(struct iwl4965_shared),
1896 &priv->hw_setting.shared_phys);
1897
1898 if (!priv->hw_setting.shared_virt) {
1899 ret = -ENOMEM;
1900 goto out;
1901 }
1902
1903 memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1904
1905 priv->hw_setting.max_txq_num = priv->cfg->mod_params->num_of_queues;
1906 priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1907 priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1908 priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1909 if (priv->cfg->mod_params->amsdu_size_8K)
1910 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1911 else
1912 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1913 priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1914 priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1915 priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1916
1917 priv->hw_setting.tx_ant_num = 2;
1918
1919 out:
1920 return ret;
1921 }
1922
1923 /**
1924 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1925 *
1926 * Destroy all TX DMA queues and structures
1927 */
1928 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
1929 {
1930 int txq_id;
1931
1932 /* Tx queues */
1933 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1934 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1935
1936 /* Keep-warm buffer */
1937 iwl4965_kw_free(priv);
1938 }
1939
1940 /**
1941 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1942 *
1943 * Does NOT advance any TFD circular buffer read/write indexes
1944 * Does NOT free the TFD itself (which is within circular buffer)
1945 */
1946 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
1947 {
1948 struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1949 struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1950 struct pci_dev *dev = priv->pci_dev;
1951 int i;
1952 int counter = 0;
1953 int index, is_odd;
1954
1955 /* Host command buffers stay mapped in memory, nothing to clean */
1956 if (txq->q.id == IWL_CMD_QUEUE_NUM)
1957 return 0;
1958
1959 /* Sanity check on number of chunks */
1960 counter = IWL_GET_BITS(*bd, num_tbs);
1961 if (counter > MAX_NUM_OF_TBS) {
1962 IWL_ERROR("Too many chunks: %i\n", counter);
1963 /* @todo issue fatal error, it is quite serious situation */
1964 return 0;
1965 }
1966
1967 /* Unmap chunks, if any.
1968 * TFD info for odd chunks is different format than for even chunks. */
1969 for (i = 0; i < counter; i++) {
1970 index = i / 2;
1971 is_odd = i & 0x1;
1972
1973 if (is_odd)
1974 pci_unmap_single(
1975 dev,
1976 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1977 (IWL_GET_BITS(bd->pa[index],
1978 tb2_addr_hi20) << 16),
1979 IWL_GET_BITS(bd->pa[index], tb2_len),
1980 PCI_DMA_TODEVICE);
1981
1982 else if (i > 0)
1983 pci_unmap_single(dev,
1984 le32_to_cpu(bd->pa[index].tb1_addr),
1985 IWL_GET_BITS(bd->pa[index], tb1_len),
1986 PCI_DMA_TODEVICE);
1987
1988 /* Free SKB, if any, for this chunk */
1989 if (txq->txb[txq->q.read_ptr].skb[i]) {
1990 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1991
1992 dev_kfree_skb(skb);
1993 txq->txb[txq->q.read_ptr].skb[i] = NULL;
1994 }
1995 }
1996 return 0;
1997 }
1998
1999 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
2000 {
2001 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
2002 return -EINVAL;
2003 }
2004
2005 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
2006 {
2007 s32 sign = 1;
2008
2009 if (num < 0) {
2010 sign = -sign;
2011 num = -num;
2012 }
2013 if (denom < 0) {
2014 sign = -sign;
2015 denom = -denom;
2016 }
2017 *res = 1;
2018 *res = ((num * 2 + denom) / (denom * 2)) * sign;
2019
2020 return 1;
2021 }
2022
2023 /**
2024 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
2025 *
2026 * Determines power supply voltage compensation for txpower calculations.
2027 * Returns number of 1/2-dB steps to subtract from gain table index,
2028 * to compensate for difference between power supply voltage during
2029 * factory measurements, vs. current power supply voltage.
2030 *
2031 * Voltage indication is higher for lower voltage.
2032 * Lower voltage requires more gain (lower gain table index).
2033 */
2034 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
2035 s32 current_voltage)
2036 {
2037 s32 comp = 0;
2038
2039 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2040 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2041 return 0;
2042
2043 iwl4965_math_div_round(current_voltage - eeprom_voltage,
2044 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2045
2046 if (current_voltage > eeprom_voltage)
2047 comp *= 2;
2048 if ((comp < -2) || (comp > 2))
2049 comp = 0;
2050
2051 return comp;
2052 }
2053
2054 static const struct iwl_channel_info *
2055 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2056 enum ieee80211_band band, u16 channel)
2057 {
2058 const struct iwl_channel_info *ch_info;
2059
2060 ch_info = iwl_get_channel_info(priv, band, channel);
2061
2062 if (!is_channel_valid(ch_info))
2063 return NULL;
2064
2065 return ch_info;
2066 }
2067
2068 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2069 {
2070 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2071 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2072 return CALIB_CH_GROUP_5;
2073
2074 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2075 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2076 return CALIB_CH_GROUP_1;
2077
2078 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2079 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2080 return CALIB_CH_GROUP_2;
2081
2082 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2083 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2084 return CALIB_CH_GROUP_3;
2085
2086 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2087 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2088 return CALIB_CH_GROUP_4;
2089
2090 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2091 return -1;
2092 }
2093
2094 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2095 {
2096 s32 b = -1;
2097
2098 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2099 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2100 continue;
2101
2102 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2103 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2104 break;
2105 }
2106
2107 return b;
2108 }
2109
2110 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2111 {
2112 s32 val;
2113
2114 if (x2 == x1)
2115 return y1;
2116 else {
2117 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2118 return val + y2;
2119 }
2120 }
2121
2122 /**
2123 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2124 *
2125 * Interpolates factory measurements from the two sample channels within a
2126 * sub-band, to apply to channel of interest. Interpolation is proportional to
2127 * differences in channel frequencies, which is proportional to differences
2128 * in channel number.
2129 */
2130 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2131 struct iwl4965_eeprom_calib_ch_info *chan_info)
2132 {
2133 s32 s = -1;
2134 u32 c;
2135 u32 m;
2136 const struct iwl4965_eeprom_calib_measure *m1;
2137 const struct iwl4965_eeprom_calib_measure *m2;
2138 struct iwl4965_eeprom_calib_measure *omeas;
2139 u32 ch_i1;
2140 u32 ch_i2;
2141
2142 s = iwl4965_get_sub_band(priv, channel);
2143 if (s >= EEPROM_TX_POWER_BANDS) {
2144 IWL_ERROR("Tx Power can not find channel %d ", channel);
2145 return -1;
2146 }
2147
2148 ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2149 ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2150 chan_info->ch_num = (u8) channel;
2151
2152 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2153 channel, s, ch_i1, ch_i2);
2154
2155 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2156 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2157 m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2158 measurements[c][m]);
2159 m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2160 measurements[c][m]);
2161 omeas = &(chan_info->measurements[c][m]);
2162
2163 omeas->actual_pow =
2164 (u8) iwl4965_interpolate_value(channel, ch_i1,
2165 m1->actual_pow,
2166 ch_i2,
2167 m2->actual_pow);
2168 omeas->gain_idx =
2169 (u8) iwl4965_interpolate_value(channel, ch_i1,
2170 m1->gain_idx, ch_i2,
2171 m2->gain_idx);
2172 omeas->temperature =
2173 (u8) iwl4965_interpolate_value(channel, ch_i1,
2174 m1->temperature,
2175 ch_i2,
2176 m2->temperature);
2177 omeas->pa_det =
2178 (s8) iwl4965_interpolate_value(channel, ch_i1,
2179 m1->pa_det, ch_i2,
2180 m2->pa_det);
2181
2182 IWL_DEBUG_TXPOWER
2183 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2184 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2185 IWL_DEBUG_TXPOWER
2186 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2187 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2188 IWL_DEBUG_TXPOWER
2189 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2190 m1->pa_det, m2->pa_det, omeas->pa_det);
2191 IWL_DEBUG_TXPOWER
2192 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2193 m1->temperature, m2->temperature,
2194 omeas->temperature);
2195 }
2196 }
2197
2198 return 0;
2199 }
2200
2201 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2202 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2203 static s32 back_off_table[] = {
2204 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2205 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2206 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2207 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2208 10 /* CCK */
2209 };
2210
2211 /* Thermal compensation values for txpower for various frequency ranges ...
2212 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2213 static struct iwl4965_txpower_comp_entry {
2214 s32 degrees_per_05db_a;
2215 s32 degrees_per_05db_a_denom;
2216 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2217 {9, 2}, /* group 0 5.2, ch 34-43 */
2218 {4, 1}, /* group 1 5.2, ch 44-70 */
2219 {4, 1}, /* group 2 5.2, ch 71-124 */
2220 {4, 1}, /* group 3 5.2, ch 125-200 */
2221 {3, 1} /* group 4 2.4, ch all */
2222 };
2223
2224 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2225 {
2226 if (!band) {
2227 if ((rate_power_index & 7) <= 4)
2228 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2229 }
2230 return MIN_TX_GAIN_INDEX;
2231 }
2232
2233 struct gain_entry {
2234 u8 dsp;
2235 u8 radio;
2236 };
2237
2238 static const struct gain_entry gain_table[2][108] = {
2239 /* 5.2GHz power gain index table */
2240 {
2241 {123, 0x3F}, /* highest txpower */
2242 {117, 0x3F},
2243 {110, 0x3F},
2244 {104, 0x3F},
2245 {98, 0x3F},
2246 {110, 0x3E},
2247 {104, 0x3E},
2248 {98, 0x3E},
2249 {110, 0x3D},
2250 {104, 0x3D},
2251 {98, 0x3D},
2252 {110, 0x3C},
2253 {104, 0x3C},
2254 {98, 0x3C},
2255 {110, 0x3B},
2256 {104, 0x3B},
2257 {98, 0x3B},
2258 {110, 0x3A},
2259 {104, 0x3A},
2260 {98, 0x3A},
2261 {110, 0x39},
2262 {104, 0x39},
2263 {98, 0x39},
2264 {110, 0x38},
2265 {104, 0x38},
2266 {98, 0x38},
2267 {110, 0x37},
2268 {104, 0x37},
2269 {98, 0x37},
2270 {110, 0x36},
2271 {104, 0x36},
2272 {98, 0x36},
2273 {110, 0x35},
2274 {104, 0x35},
2275 {98, 0x35},
2276 {110, 0x34},
2277 {104, 0x34},
2278 {98, 0x34},
2279 {110, 0x33},
2280 {104, 0x33},
2281 {98, 0x33},
2282 {110, 0x32},
2283 {104, 0x32},
2284 {98, 0x32},
2285 {110, 0x31},
2286 {104, 0x31},
2287 {98, 0x31},
2288 {110, 0x30},
2289 {104, 0x30},
2290 {98, 0x30},
2291 {110, 0x25},
2292 {104, 0x25},
2293 {98, 0x25},
2294 {110, 0x24},
2295 {104, 0x24},
2296 {98, 0x24},
2297 {110, 0x23},
2298 {104, 0x23},
2299 {98, 0x23},
2300 {110, 0x22},
2301 {104, 0x18},
2302 {98, 0x18},
2303 {110, 0x17},
2304 {104, 0x17},
2305 {98, 0x17},
2306 {110, 0x16},
2307 {104, 0x16},
2308 {98, 0x16},
2309 {110, 0x15},
2310 {104, 0x15},
2311 {98, 0x15},
2312 {110, 0x14},
2313 {104, 0x14},
2314 {98, 0x14},
2315 {110, 0x13},
2316 {104, 0x13},
2317 {98, 0x13},
2318 {110, 0x12},
2319 {104, 0x08},
2320 {98, 0x08},
2321 {110, 0x07},
2322 {104, 0x07},
2323 {98, 0x07},
2324 {110, 0x06},
2325 {104, 0x06},
2326 {98, 0x06},
2327 {110, 0x05},
2328 {104, 0x05},
2329 {98, 0x05},
2330 {110, 0x04},
2331 {104, 0x04},
2332 {98, 0x04},
2333 {110, 0x03},
2334 {104, 0x03},
2335 {98, 0x03},
2336 {110, 0x02},
2337 {104, 0x02},
2338 {98, 0x02},
2339 {110, 0x01},
2340 {104, 0x01},
2341 {98, 0x01},
2342 {110, 0x00},
2343 {104, 0x00},
2344 {98, 0x00},
2345 {93, 0x00},
2346 {88, 0x00},
2347 {83, 0x00},
2348 {78, 0x00},
2349 },
2350 /* 2.4GHz power gain index table */
2351 {
2352 {110, 0x3f}, /* highest txpower */
2353 {104, 0x3f},
2354 {98, 0x3f},
2355 {110, 0x3e},
2356 {104, 0x3e},
2357 {98, 0x3e},
2358 {110, 0x3d},
2359 {104, 0x3d},
2360 {98, 0x3d},
2361 {110, 0x3c},
2362 {104, 0x3c},
2363 {98, 0x3c},
2364 {110, 0x3b},
2365 {104, 0x3b},
2366 {98, 0x3b},
2367 {110, 0x3a},
2368 {104, 0x3a},
2369 {98, 0x3a},
2370 {110, 0x39},
2371 {104, 0x39},
2372 {98, 0x39},
2373 {110, 0x38},
2374 {104, 0x38},
2375 {98, 0x38},
2376 {110, 0x37},
2377 {104, 0x37},
2378 {98, 0x37},
2379 {110, 0x36},
2380 {104, 0x36},
2381 {98, 0x36},
2382 {110, 0x35},
2383 {104, 0x35},
2384 {98, 0x35},
2385 {110, 0x34},
2386 {104, 0x34},
2387 {98, 0x34},
2388 {110, 0x33},
2389 {104, 0x33},
2390 {98, 0x33},
2391 {110, 0x32},
2392 {104, 0x32},
2393 {98, 0x32},
2394 {110, 0x31},
2395 {104, 0x31},
2396 {98, 0x31},
2397 {110, 0x30},
2398 {104, 0x30},
2399 {98, 0x30},
2400 {110, 0x6},
2401 {104, 0x6},
2402 {98, 0x6},
2403 {110, 0x5},
2404 {104, 0x5},
2405 {98, 0x5},
2406 {110, 0x4},
2407 {104, 0x4},
2408 {98, 0x4},
2409 {110, 0x3},
2410 {104, 0x3},
2411 {98, 0x3},
2412 {110, 0x2},
2413 {104, 0x2},
2414 {98, 0x2},
2415 {110, 0x1},
2416 {104, 0x1},
2417 {98, 0x1},
2418 {110, 0x0},
2419 {104, 0x0},
2420 {98, 0x0},
2421 {97, 0},
2422 {96, 0},
2423 {95, 0},
2424 {94, 0},
2425 {93, 0},
2426 {92, 0},
2427 {91, 0},
2428 {90, 0},
2429 {89, 0},
2430 {88, 0},
2431 {87, 0},
2432 {86, 0},
2433 {85, 0},
2434 {84, 0},
2435 {83, 0},
2436 {82, 0},
2437 {81, 0},
2438 {80, 0},
2439 {79, 0},
2440 {78, 0},
2441 {77, 0},
2442 {76, 0},
2443 {75, 0},
2444 {74, 0},
2445 {73, 0},
2446 {72, 0},
2447 {71, 0},
2448 {70, 0},
2449 {69, 0},
2450 {68, 0},
2451 {67, 0},
2452 {66, 0},
2453 {65, 0},
2454 {64, 0},
2455 {63, 0},
2456 {62, 0},
2457 {61, 0},
2458 {60, 0},
2459 {59, 0},
2460 }
2461 };
2462
2463 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2464 u8 is_fat, u8 ctrl_chan_high,
2465 struct iwl4965_tx_power_db *tx_power_tbl)
2466 {
2467 u8 saturation_power;
2468 s32 target_power;
2469 s32 user_target_power;
2470 s32 power_limit;
2471 s32 current_temp;
2472 s32 reg_limit;
2473 s32 current_regulatory;
2474 s32 txatten_grp = CALIB_CH_GROUP_MAX;
2475 int i;
2476 int c;
2477 const struct iwl_channel_info *ch_info = NULL;
2478 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2479 const struct iwl4965_eeprom_calib_measure *measurement;
2480 s16 voltage;
2481 s32 init_voltage;
2482 s32 voltage_compensation;
2483 s32 degrees_per_05db_num;
2484 s32 degrees_per_05db_denom;
2485 s32 factory_temp;
2486 s32 temperature_comp[2];
2487 s32 factory_gain_index[2];
2488 s32 factory_actual_pwr[2];
2489 s32 power_index;
2490
2491 /* Sanity check requested level (dBm) */
2492 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2493 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2494 priv->user_txpower_limit);
2495 return -EINVAL;
2496 }
2497 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2498 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2499 priv->user_txpower_limit);
2500 return -EINVAL;
2501 }
2502
2503 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2504 * are used for indexing into txpower table) */
2505 user_target_power = 2 * priv->user_txpower_limit;
2506
2507 /* Get current (RXON) channel, band, width */
2508 ch_info =
2509 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2510
2511 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2512 is_fat);
2513
2514 if (!ch_info)
2515 return -EINVAL;
2516
2517 /* get txatten group, used to select 1) thermal txpower adjustment
2518 * and 2) mimo txpower balance between Tx chains. */
2519 txatten_grp = iwl4965_get_tx_atten_grp(channel);
2520 if (txatten_grp < 0)
2521 return -EINVAL;
2522
2523 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2524 channel, txatten_grp);
2525
2526 if (is_fat) {
2527 if (ctrl_chan_high)
2528 channel -= 2;
2529 else
2530 channel += 2;
2531 }
2532
2533 /* hardware txpower limits ...
2534 * saturation (clipping distortion) txpowers are in half-dBm */
2535 if (band)
2536 saturation_power = priv->eeprom.calib_info.saturation_power24;
2537 else
2538 saturation_power = priv->eeprom.calib_info.saturation_power52;
2539
2540 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2541 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2542 if (band)
2543 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2544 else
2545 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2546 }
2547
2548 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2549 * max_power_avg values are in dBm, convert * 2 */
2550 if (is_fat)
2551 reg_limit = ch_info->fat_max_power_avg * 2;
2552 else
2553 reg_limit = ch_info->max_power_avg * 2;
2554
2555 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2556 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2557 if (band)
2558 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2559 else
2560 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2561 }
2562
2563 /* Interpolate txpower calibration values for this channel,
2564 * based on factory calibration tests on spaced channels. */
2565 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2566
2567 /* calculate tx gain adjustment based on power supply voltage */
2568 voltage = priv->eeprom.calib_info.voltage;
2569 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2570 voltage_compensation =
2571 iwl4965_get_voltage_compensation(voltage, init_voltage);
2572
2573 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2574 init_voltage,
2575 voltage, voltage_compensation);
2576
2577 /* get current temperature (Celsius) */
2578 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2579 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2580 current_temp = KELVIN_TO_CELSIUS(current_temp);
2581
2582 /* select thermal txpower adjustment params, based on channel group
2583 * (same frequency group used for mimo txatten adjustment) */
2584 degrees_per_05db_num =
2585 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2586 degrees_per_05db_denom =
2587 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2588
2589 /* get per-chain txpower values from factory measurements */
2590 for (c = 0; c < 2; c++) {
2591 measurement = &ch_eeprom_info.measurements[c][1];
2592
2593 /* txgain adjustment (in half-dB steps) based on difference
2594 * between factory and current temperature */
2595 factory_temp = measurement->temperature;
2596 iwl4965_math_div_round((current_temp - factory_temp) *
2597 degrees_per_05db_denom,
2598 degrees_per_05db_num,
2599 &temperature_comp[c]);
2600
2601 factory_gain_index[c] = measurement->gain_idx;
2602 factory_actual_pwr[c] = measurement->actual_pow;
2603
2604 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2605 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2606 "curr tmp %d, comp %d steps\n",
2607 factory_temp, current_temp,
2608 temperature_comp[c]);
2609
2610 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2611 factory_gain_index[c],
2612 factory_actual_pwr[c]);
2613 }
2614
2615 /* for each of 33 bit-rates (including 1 for CCK) */
2616 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2617 u8 is_mimo_rate;
2618 union iwl4965_tx_power_dual_stream tx_power;
2619
2620 /* for mimo, reduce each chain's txpower by half
2621 * (3dB, 6 steps), so total output power is regulatory
2622 * compliant. */
2623 if (i & 0x8) {
2624 current_regulatory = reg_limit -
2625 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2626 is_mimo_rate = 1;
2627 } else {
2628 current_regulatory = reg_limit;
2629 is_mimo_rate = 0;
2630 }
2631
2632 /* find txpower limit, either hardware or regulatory */
2633 power_limit = saturation_power - back_off_table[i];
2634 if (power_limit > current_regulatory)
2635 power_limit = current_regulatory;
2636
2637 /* reduce user's txpower request if necessary
2638 * for this rate on this channel */
2639 target_power = user_target_power;
2640 if (target_power > power_limit)
2641 target_power = power_limit;
2642
2643 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2644 i, saturation_power - back_off_table[i],
2645 current_regulatory, user_target_power,
2646 target_power);
2647
2648 /* for each of 2 Tx chains (radio transmitters) */
2649 for (c = 0; c < 2; c++) {
2650 s32 atten_value;
2651
2652 if (is_mimo_rate)
2653 atten_value =
2654 (s32)le32_to_cpu(priv->card_alive_init.
2655 tx_atten[txatten_grp][c]);
2656 else
2657 atten_value = 0;
2658
2659 /* calculate index; higher index means lower txpower */
2660 power_index = (u8) (factory_gain_index[c] -
2661 (target_power -
2662 factory_actual_pwr[c]) -
2663 temperature_comp[c] -
2664 voltage_compensation +
2665 atten_value);
2666
2667 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2668 power_index); */
2669
2670 if (power_index < get_min_power_index(i, band))
2671 power_index = get_min_power_index(i, band);
2672
2673 /* adjust 5 GHz index to support negative indexes */
2674 if (!band)
2675 power_index += 9;
2676
2677 /* CCK, rate 32, reduce txpower for CCK */
2678 if (i == POWER_TABLE_CCK_ENTRY)
2679 power_index +=
2680 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2681
2682 /* stay within the table! */
2683 if (power_index > 107) {
2684 IWL_WARNING("txpower index %d > 107\n",
2685 power_index);
2686 power_index = 107;
2687 }
2688 if (power_index < 0) {
2689 IWL_WARNING("txpower index %d < 0\n",
2690 power_index);
2691 power_index = 0;
2692 }
2693
2694 /* fill txpower command for this rate/chain */
2695 tx_power.s.radio_tx_gain[c] =
2696 gain_table[band][power_index].radio;
2697 tx_power.s.dsp_predis_atten[c] =
2698 gain_table[band][power_index].dsp;
2699
2700 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2701 "gain 0x%02x dsp %d\n",
2702 c, atten_value, power_index,
2703 tx_power.s.radio_tx_gain[c],
2704 tx_power.s.dsp_predis_atten[c]);
2705 }/* for each chain */
2706
2707 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2708
2709 }/* for each rate */
2710
2711 return 0;
2712 }
2713
2714 /**
2715 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2716 *
2717 * Uses the active RXON for channel, band, and characteristics (fat, high)
2718 * The power limit is taken from priv->user_txpower_limit.
2719 */
2720 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2721 {
2722 struct iwl4965_txpowertable_cmd cmd = { 0 };
2723 int ret;
2724 u8 band = 0;
2725 u8 is_fat = 0;
2726 u8 ctrl_chan_high = 0;
2727
2728 if (test_bit(STATUS_SCANNING, &priv->status)) {
2729 /* If this gets hit a lot, switch it to a BUG() and catch
2730 * the stack trace to find out who is calling this during
2731 * a scan. */
2732 IWL_WARNING("TX Power requested while scanning!\n");
2733 return -EAGAIN;
2734 }
2735
2736 band = priv->band == IEEE80211_BAND_2GHZ;
2737
2738 is_fat = is_fat_channel(priv->active_rxon.flags);
2739
2740 if (is_fat &&
2741 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2742 ctrl_chan_high = 1;
2743
2744 cmd.band = band;
2745 cmd.channel = priv->active_rxon.channel;
2746
2747 ret = iwl4965_fill_txpower_tbl(priv, band,
2748 le16_to_cpu(priv->active_rxon.channel),
2749 is_fat, ctrl_chan_high, &cmd.tx_power);
2750 if (ret)
2751 goto out;
2752
2753 ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2754
2755 out:
2756 return ret;
2757 }
2758
2759 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2760 {
2761 int rc;
2762 u8 band = 0;
2763 u8 is_fat = 0;
2764 u8 ctrl_chan_high = 0;
2765 struct iwl4965_channel_switch_cmd cmd = { 0 };
2766 const struct iwl_channel_info *ch_info;
2767
2768 band = priv->band == IEEE80211_BAND_2GHZ;
2769
2770 ch_info = iwl_get_channel_info(priv, priv->band, channel);
2771
2772 is_fat = is_fat_channel(priv->staging_rxon.flags);
2773
2774 if (is_fat &&
2775 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2776 ctrl_chan_high = 1;
2777
2778 cmd.band = band;
2779 cmd.expect_beacon = 0;
2780 cmd.channel = cpu_to_le16(channel);
2781 cmd.rxon_flags = priv->active_rxon.flags;
2782 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2783 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2784 if (ch_info)
2785 cmd.expect_beacon = is_channel_radar(ch_info);
2786 else
2787 cmd.expect_beacon = 1;
2788
2789 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2790 ctrl_chan_high, &cmd.tx_power);
2791 if (rc) {
2792 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2793 return rc;
2794 }
2795
2796 rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2797 return rc;
2798 }
2799
2800 #define RTS_HCCA_RETRY_LIMIT 3
2801 #define RTS_DFAULT_RETRY_LIMIT 60
2802
2803 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2804 struct iwl_cmd *cmd,
2805 struct ieee80211_tx_control *ctrl,
2806 struct ieee80211_hdr *hdr, int sta_id,
2807 int is_hcca)
2808 {
2809 struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2810 u8 rts_retry_limit = 0;
2811 u8 data_retry_limit = 0;
2812 u16 fc = le16_to_cpu(hdr->frame_control);
2813 u8 rate_plcp;
2814 u16 rate_flags = 0;
2815 int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2816
2817 rate_plcp = iwl4965_rates[rate_idx].plcp;
2818
2819 rts_retry_limit = (is_hcca) ?
2820 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2821
2822 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2823 rate_flags |= RATE_MCS_CCK_MSK;
2824
2825
2826 if (ieee80211_is_probe_response(fc)) {
2827 data_retry_limit = 3;
2828 if (data_retry_limit < rts_retry_limit)
2829 rts_retry_limit = data_retry_limit;
2830 } else
2831 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2832
2833 if (priv->data_retry_limit != -1)
2834 data_retry_limit = priv->data_retry_limit;
2835
2836
2837 if (ieee80211_is_data(fc)) {
2838 tx->initial_rate_index = 0;
2839 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2840 } else {
2841 switch (fc & IEEE80211_FCTL_STYPE) {
2842 case IEEE80211_STYPE_AUTH:
2843 case IEEE80211_STYPE_DEAUTH:
2844 case IEEE80211_STYPE_ASSOC_REQ:
2845 case IEEE80211_STYPE_REASSOC_REQ:
2846 if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2847 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2848 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2849 }
2850 break;
2851 default:
2852 break;
2853 }
2854
2855 /* Alternate between antenna A and B for successive frames */
2856 if (priv->use_ant_b_for_management_frame) {
2857 priv->use_ant_b_for_management_frame = 0;
2858 rate_flags |= RATE_MCS_ANT_B_MSK;
2859 } else {
2860 priv->use_ant_b_for_management_frame = 1;
2861 rate_flags |= RATE_MCS_ANT_A_MSK;
2862 }
2863 }
2864
2865 tx->rts_retry_limit = rts_retry_limit;
2866 tx->data_retry_limit = data_retry_limit;
2867 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2868 }
2869
2870 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
2871 {
2872 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2873
2874 return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2875 }
2876
2877 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
2878 {
2879 return priv->temperature;
2880 }
2881
2882 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
2883 struct iwl4965_frame *frame, u8 rate)
2884 {
2885 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2886 unsigned int frame_size;
2887
2888 tx_beacon_cmd = &frame->u.beacon;
2889 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2890
2891 tx_beacon_cmd->tx.sta_id = priv->hw_setting.bcast_sta_id;
2892 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2893
2894 frame_size = iwl4965_fill_beacon_frame(priv,
2895 tx_beacon_cmd->frame,
2896 iwl4965_broadcast_addr,
2897 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2898
2899 BUG_ON(frame_size > MAX_MPDU_SIZE);
2900 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2901
2902 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2903 tx_beacon_cmd->tx.rate_n_flags =
2904 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2905 else
2906 tx_beacon_cmd->tx.rate_n_flags =
2907 iwl4965_hw_set_rate_n_flags(rate, 0);
2908
2909 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2910 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2911 return (sizeof(*tx_beacon_cmd) + frame_size);
2912 }
2913
2914 /*
2915 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2916 * given Tx queue, and enable the DMA channel used for that queue.
2917 *
2918 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2919 * channels supported in hardware.
2920 */
2921 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2922 {
2923 int rc;
2924 unsigned long flags;
2925 int txq_id = txq->q.id;
2926
2927 spin_lock_irqsave(&priv->lock, flags);
2928 rc = iwl_grab_nic_access(priv);
2929 if (rc) {
2930 spin_unlock_irqrestore(&priv->lock, flags);
2931 return rc;
2932 }
2933
2934 /* Circular buffer (TFD queue in DRAM) physical base address */
2935 iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2936 txq->q.dma_addr >> 8);
2937
2938 /* Enable DMA channel, using same id as for TFD queue */
2939 iwl_write_direct32(
2940 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2941 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2942 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2943 iwl_release_nic_access(priv);
2944 spin_unlock_irqrestore(&priv->lock, flags);
2945
2946 return 0;
2947 }
2948
2949 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2950 dma_addr_t addr, u16 len)
2951 {
2952 int index, is_odd;
2953 struct iwl4965_tfd_frame *tfd = ptr;
2954 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2955
2956 /* Each TFD can point to a maximum 20 Tx buffers */
2957 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2958 IWL_ERROR("Error can not send more than %d chunks\n",
2959 MAX_NUM_OF_TBS);
2960 return -EINVAL;
2961 }
2962
2963 index = num_tbs / 2;
2964 is_odd = num_tbs & 0x1;
2965
2966 if (!is_odd) {
2967 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2968 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2969 iwl_get_dma_hi_address(addr));
2970 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2971 } else {
2972 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2973 (u32) (addr & 0xffff));
2974 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2975 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2976 }
2977
2978 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2979
2980 return 0;
2981 }
2982
2983 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
2984 {
2985 u16 hw_version = priv->eeprom.board_revision_4965;
2986
2987 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2988 ((hw_version >> 8) & 0x0F),
2989 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2990
2991 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2992 priv->eeprom.board_pba_number_4965);
2993 }
2994
2995 #define IWL_TX_CRC_SIZE 4
2996 #define IWL_TX_DELIMITER_SIZE 4
2997
2998 /**
2999 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
3000 */
3001 int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
3002 struct iwl4965_tx_queue *txq, u16 byte_cnt)
3003 {
3004 int len;
3005 int txq_id = txq->q.id;
3006 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
3007
3008 if (txq->need_update == 0)
3009 return 0;
3010
3011 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
3012
3013 /* Set up byte count within first 256 entries */
3014 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3015 tfd_offset[txq->q.write_ptr], byte_cnt, len);
3016
3017 /* If within first 64 entries, duplicate at end */
3018 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
3019 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3020 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
3021 byte_cnt, len);
3022
3023 return 0;
3024 }
3025
3026 /**
3027 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
3028 *
3029 * Selects how many and which Rx receivers/antennas/chains to use.
3030 * This should not be used for scan command ... it puts data in wrong place.
3031 */
3032 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
3033 {
3034 u8 is_single = is_single_stream(priv);
3035 u8 idle_state, rx_state;
3036
3037 priv->staging_rxon.rx_chain = 0;
3038 rx_state = idle_state = 3;
3039
3040 /* Tell uCode which antennas are actually connected.
3041 * Before first association, we assume all antennas are connected.
3042 * Just after first association, iwl4965_noise_calibration()
3043 * checks which antennas actually *are* connected. */
3044 priv->staging_rxon.rx_chain |=
3045 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3046
3047 /* How many receivers should we use? */
3048 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3049 priv->staging_rxon.rx_chain |=
3050 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3051 priv->staging_rxon.rx_chain |=
3052 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3053
3054 if (!is_single && (rx_state >= 2) &&
3055 !test_bit(STATUS_POWER_PMI, &priv->status))
3056 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3057 else
3058 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3059
3060 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3061 }
3062
3063 /**
3064 * sign_extend - Sign extend a value using specified bit as sign-bit
3065 *
3066 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3067 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3068 *
3069 * @param oper value to sign extend
3070 * @param index 0 based bit index (0<=index<32) to sign bit
3071 */
3072 static s32 sign_extend(u32 oper, int index)
3073 {
3074 u8 shift = 31 - index;
3075
3076 return (s32)(oper << shift) >> shift;
3077 }
3078
3079 /**
3080 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3081 * @statistics: Provides the temperature reading from the uCode
3082 *
3083 * A return of <0 indicates bogus data in the statistics
3084 */
3085 int iwl4965_get_temperature(const struct iwl_priv *priv)
3086 {
3087 s32 temperature;
3088 s32 vt;
3089 s32 R1, R2, R3;
3090 u32 R4;
3091
3092 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3093 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3094 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3095 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3096 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3097 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3098 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3099 } else {
3100 IWL_DEBUG_TEMP("Running temperature calibration\n");
3101 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3102 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3103 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3104 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3105 }
3106
3107 /*
3108 * Temperature is only 23 bits, so sign extend out to 32.
3109 *
3110 * NOTE If we haven't received a statistics notification yet
3111 * with an updated temperature, use R4 provided to us in the
3112 * "initialize" ALIVE response.
3113 */
3114 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3115 vt = sign_extend(R4, 23);
3116 else
3117 vt = sign_extend(
3118 le32_to_cpu(priv->statistics.general.temperature), 23);
3119
3120 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3121 R1, R2, R3, vt);
3122
3123 if (R3 == R1) {
3124 IWL_ERROR("Calibration conflict R1 == R3\n");
3125 return -1;
3126 }
3127
3128 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3129 * Add offset to center the adjustment around 0 degrees Centigrade. */
3130 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3131 temperature /= (R3 - R1);
3132 temperature = (temperature * 97) / 100 +
3133 TEMPERATURE_CALIB_KELVIN_OFFSET;
3134
3135 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3136 KELVIN_TO_CELSIUS(temperature));
3137
3138 return temperature;
3139 }
3140
3141 /* Adjust Txpower only if temperature variance is greater than threshold. */
3142 #define IWL_TEMPERATURE_THRESHOLD 3
3143
3144 /**
3145 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3146 *
3147 * If the temperature changed has changed sufficiently, then a recalibration
3148 * is needed.
3149 *
3150 * Assumes caller will replace priv->last_temperature once calibration
3151 * executed.
3152 */
3153 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3154 {
3155 int temp_diff;
3156
3157 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3158 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3159 return 0;
3160 }
3161
3162 temp_diff = priv->temperature - priv->last_temperature;
3163
3164 /* get absolute value */
3165 if (temp_diff < 0) {
3166 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3167 temp_diff = -temp_diff;
3168 } else if (temp_diff == 0)
3169 IWL_DEBUG_POWER("Same temp, \n");
3170 else
3171 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3172
3173 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3174 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3175 return 0;
3176 }
3177
3178 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3179
3180 return 1;
3181 }
3182
3183 /* Calculate noise level, based on measurements during network silence just
3184 * before arriving beacon. This measurement can be done only if we know
3185 * exactly when to expect beacons, therefore only when we're associated. */
3186 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3187 {
3188 struct statistics_rx_non_phy *rx_info
3189 = &(priv->statistics.rx.general);
3190 int num_active_rx = 0;
3191 int total_silence = 0;
3192 int bcn_silence_a =
3193 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3194 int bcn_silence_b =
3195 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3196 int bcn_silence_c =
3197 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3198
3199 if (bcn_silence_a) {
3200 total_silence += bcn_silence_a;
3201 num_active_rx++;
3202 }
3203 if (bcn_silence_b) {
3204 total_silence += bcn_silence_b;
3205 num_active_rx++;
3206 }
3207 if (bcn_silence_c) {
3208 total_silence += bcn_silence_c;
3209 num_active_rx++;
3210 }
3211
3212 /* Average among active antennas */
3213 if (num_active_rx)
3214 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3215 else
3216 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3217
3218 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3219 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3220 priv->last_rx_noise);
3221 }
3222
3223 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3224 {
3225 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3226 int change;
3227 s32 temp;
3228
3229 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3230 (int)sizeof(priv->statistics), pkt->len);
3231
3232 change = ((priv->statistics.general.temperature !=
3233 pkt->u.stats.general.temperature) ||
3234 ((priv->statistics.flag &
3235 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3236 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3237
3238 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3239
3240 set_bit(STATUS_STATISTICS, &priv->status);
3241
3242 /* Reschedule the statistics timer to occur in
3243 * REG_RECALIB_PERIOD seconds to ensure we get a
3244 * thermal update even if the uCode doesn't give
3245 * us one */
3246 mod_timer(&priv->statistics_periodic, jiffies +
3247 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3248
3249 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3250 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3251 iwl4965_rx_calc_noise(priv);
3252 #ifdef CONFIG_IWL4965_SENSITIVITY
3253 queue_work(priv->workqueue, &priv->sensitivity_work);
3254 #endif
3255 }
3256
3257 iwl_leds_background(priv);
3258
3259 /* If the hardware hasn't reported a change in
3260 * temperature then don't bother computing a
3261 * calibrated temperature value */
3262 if (!change)
3263 return;
3264
3265 temp = iwl4965_get_temperature(priv);
3266 if (temp < 0)
3267 return;
3268
3269 if (priv->temperature != temp) {
3270 if (priv->temperature)
3271 IWL_DEBUG_TEMP("Temperature changed "
3272 "from %dC to %dC\n",
3273 KELVIN_TO_CELSIUS(priv->temperature),
3274 KELVIN_TO_CELSIUS(temp));
3275 else
3276 IWL_DEBUG_TEMP("Temperature "
3277 "initialized to %dC\n",
3278 KELVIN_TO_CELSIUS(temp));
3279 }
3280
3281 priv->temperature = temp;
3282 set_bit(STATUS_TEMPERATURE, &priv->status);
3283
3284 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3285 iwl4965_is_temp_calib_needed(priv))
3286 queue_work(priv->workqueue, &priv->txpower_work);
3287 }
3288
3289 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3290 struct sk_buff *skb,
3291 struct iwl4965_rx_phy_res *rx_start,
3292 struct ieee80211_rx_status *stats,
3293 u32 ampdu_status)
3294 {
3295 s8 signal = stats->ssi;
3296 s8 noise = 0;
3297 int rate = stats->rate_idx;
3298 u64 tsf = stats->mactime;
3299 __le16 phy_flags_hw = rx_start->phy_flags;
3300 struct iwl4965_rt_rx_hdr {
3301 struct ieee80211_radiotap_header rt_hdr;
3302 __le64 rt_tsf; /* TSF */
3303 u8 rt_flags; /* radiotap packet flags */
3304 u8 rt_rate; /* rate in 500kb/s */
3305 __le16 rt_channelMHz; /* channel in MHz */
3306 __le16 rt_chbitmask; /* channel bitfield */
3307 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3308 s8 rt_dbmnoise;
3309 u8 rt_antenna; /* antenna number */
3310 } __attribute__ ((packed)) *iwl4965_rt;
3311
3312 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3313 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3314 if (net_ratelimit())
3315 printk(KERN_ERR "not enough headroom [%d] for "
3316 "radiotap head [%zd]\n",
3317 skb_headroom(skb), sizeof(*iwl4965_rt));
3318 return;
3319 }
3320
3321 /* put radiotap header in front of 802.11 header and data */
3322 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3323
3324 /* initialise radiotap header */
3325 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3326 iwl4965_rt->rt_hdr.it_pad = 0;
3327
3328 /* total header + data */
3329 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3330 &iwl4965_rt->rt_hdr.it_len);
3331
3332 /* Indicate all the fields we add to the radiotap header */
3333 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3334 (1 << IEEE80211_RADIOTAP_FLAGS) |
3335 (1 << IEEE80211_RADIOTAP_RATE) |
3336 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3337 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3338 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3339 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3340 &iwl4965_rt->rt_hdr.it_present);
3341
3342 /* Zero the flags, we'll add to them as we go */
3343 iwl4965_rt->rt_flags = 0;
3344
3345 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3346
3347 iwl4965_rt->rt_dbmsignal = signal;
3348 iwl4965_rt->rt_dbmnoise = noise;
3349
3350 /* Convert the channel frequency and set the flags */
3351 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3352 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3353 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3354 IEEE80211_CHAN_5GHZ),
3355 &iwl4965_rt->rt_chbitmask);
3356 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3357 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3358 IEEE80211_CHAN_2GHZ),
3359 &iwl4965_rt->rt_chbitmask);
3360 else /* 802.11g */
3361 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3362 IEEE80211_CHAN_2GHZ),
3363 &iwl4965_rt->rt_chbitmask);
3364
3365 if (rate == -1)
3366 iwl4965_rt->rt_rate = 0;
3367 else
3368 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3369
3370 /*
3371 * "antenna number"
3372 *
3373 * It seems that the antenna field in the phy flags value
3374 * is actually a bitfield. This is undefined by radiotap,
3375 * it wants an actual antenna number but I always get "7"
3376 * for most legacy frames I receive indicating that the
3377 * same frame was received on all three RX chains.
3378 *
3379 * I think this field should be removed in favour of a
3380 * new 802.11n radiotap field "RX chains" that is defined
3381 * as a bitmask.
3382 */
3383 iwl4965_rt->rt_antenna =
3384 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3385
3386 /* set the preamble flag if appropriate */
3387 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3388 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3389
3390 stats->flag |= RX_FLAG_RADIOTAP;
3391 }
3392
3393 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3394 {
3395 /* 0 - mgmt, 1 - cnt, 2 - data */
3396 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3397 priv->rx_stats[idx].cnt++;
3398 priv->rx_stats[idx].bytes += len;
3399 }
3400
3401 static u32 iwl4965_translate_rx_status(u32 decrypt_in)
3402 {
3403 u32 decrypt_out = 0;
3404
3405 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
3406 RX_RES_STATUS_STATION_FOUND)
3407 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
3408 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
3409
3410 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
3411
3412 /* packet was not encrypted */
3413 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3414 RX_RES_STATUS_SEC_TYPE_NONE)
3415 return decrypt_out;
3416
3417 /* packet was encrypted with unknown alg */
3418 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3419 RX_RES_STATUS_SEC_TYPE_ERR)
3420 return decrypt_out;
3421
3422 /* decryption was not done in HW */
3423 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
3424 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
3425 return decrypt_out;
3426
3427 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
3428
3429 case RX_RES_STATUS_SEC_TYPE_CCMP:
3430 /* alg is CCM: check MIC only */
3431 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
3432 /* Bad MIC */
3433 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3434 else
3435 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3436
3437 break;
3438
3439 case RX_RES_STATUS_SEC_TYPE_TKIP:
3440 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
3441 /* Bad TTAK */
3442 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
3443 break;
3444 }
3445 /* fall through if TTAK OK */
3446 default:
3447 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
3448 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3449 else
3450 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3451 break;
3452 };
3453
3454 IWL_DEBUG_RX("decrypt_in:0x%x decrypt_out = 0x%x\n",
3455 decrypt_in, decrypt_out);
3456
3457 return decrypt_out;
3458 }
3459
3460 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
3461 int include_phy,
3462 struct iwl4965_rx_mem_buffer *rxb,
3463 struct ieee80211_rx_status *stats)
3464 {
3465 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3466 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3467 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3468 struct ieee80211_hdr *hdr;
3469 u16 len;
3470 __le32 *rx_end;
3471 unsigned int skblen;
3472 u32 ampdu_status;
3473 u32 ampdu_status_legacy;
3474
3475 if (!include_phy && priv->last_phy_res[0])
3476 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3477
3478 if (!rx_start) {
3479 IWL_ERROR("MPDU frame without a PHY data\n");
3480 return;
3481 }
3482 if (include_phy) {
3483 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3484 rx_start->cfg_phy_cnt);
3485
3486 len = le16_to_cpu(rx_start->byte_count);
3487
3488 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3489 sizeof(struct iwl4965_rx_phy_res) +
3490 rx_start->cfg_phy_cnt + len);
3491
3492 } else {
3493 struct iwl4965_rx_mpdu_res_start *amsdu =
3494 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3495
3496 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3497 sizeof(struct iwl4965_rx_mpdu_res_start));
3498 len = le16_to_cpu(amsdu->byte_count);
3499 rx_start->byte_count = amsdu->byte_count;
3500 rx_end = (__le32 *) (((u8 *) hdr) + len);
3501 }
3502 if (len > priv->hw_setting.max_pkt_size || len < 16) {
3503 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3504 return;
3505 }
3506
3507 ampdu_status = le32_to_cpu(*rx_end);
3508 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3509
3510 if (!include_phy) {
3511 /* New status scheme, need to translate */
3512 ampdu_status_legacy = ampdu_status;
3513 ampdu_status = iwl4965_translate_rx_status(ampdu_status);
3514 }
3515
3516 /* start from MAC */
3517 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3518 skb_put(rxb->skb, len); /* end where data ends */
3519
3520 /* We only process data packets if the interface is open */
3521 if (unlikely(!priv->is_open)) {
3522 IWL_DEBUG_DROP_LIMIT
3523 ("Dropping packet while interface is not open.\n");
3524 return;
3525 }
3526
3527 stats->flag = 0;
3528 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3529
3530 if (priv->cfg->mod_params->hw_crypto)
3531 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3532
3533 if (priv->add_radiotap)
3534 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3535
3536 iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3537 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3538 priv->alloc_rxb_skb--;
3539 rxb->skb = NULL;
3540 }
3541
3542 /* Calc max signal level (dBm) among 3 possible receivers */
3543 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3544 {
3545 /* data from PHY/DSP regarding signal strength, etc.,
3546 * contents are always there, not configurable by host. */
3547 struct iwl4965_rx_non_cfg_phy *ncphy =
3548 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3549 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3550 >> IWL_AGC_DB_POS;
3551
3552 u32 valid_antennae =
3553 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3554 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3555 u8 max_rssi = 0;
3556 u32 i;
3557
3558 /* Find max rssi among 3 possible receivers.
3559 * These values are measured by the digital signal processor (DSP).
3560 * They should stay fairly constant even as the signal strength varies,
3561 * if the radio's automatic gain control (AGC) is working right.
3562 * AGC value (see below) will provide the "interesting" info. */
3563 for (i = 0; i < 3; i++)
3564 if (valid_antennae & (1 << i))
3565 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3566
3567 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3568 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3569 max_rssi, agc);
3570
3571 /* dBm = max_rssi dB - agc dB - constant.
3572 * Higher AGC (higher radio gain) means lower signal. */
3573 return (max_rssi - agc - IWL_RSSI_OFFSET);
3574 }
3575
3576 #ifdef CONFIG_IWL4965_HT
3577
3578 void iwl4965_init_ht_hw_capab(struct iwl_priv *priv,
3579 struct ieee80211_ht_info *ht_info,
3580 enum ieee80211_band band)
3581 {
3582 ht_info->cap = 0;
3583 memset(ht_info->supp_mcs_set, 0, 16);
3584
3585 ht_info->ht_supported = 1;
3586
3587 if (band == IEEE80211_BAND_5GHZ) {
3588 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3589 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3590 ht_info->supp_mcs_set[4] = 0x01;
3591 }
3592 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3593 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3594 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3595 (IWL_MIMO_PS_NONE << 2));
3596
3597 if (priv->cfg->mod_params->amsdu_size_8K)
3598 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3599
3600 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3601 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3602
3603 ht_info->supp_mcs_set[0] = 0xFF;
3604 ht_info->supp_mcs_set[1] = 0xFF;
3605 }
3606 #endif /* CONFIG_IWL4965_HT */
3607
3608 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3609 {
3610 unsigned long flags;
3611
3612 spin_lock_irqsave(&priv->sta_lock, flags);
3613 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3614 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3615 priv->stations[sta_id].sta.sta.modify_mask = 0;
3616 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3617 spin_unlock_irqrestore(&priv->sta_lock, flags);
3618
3619 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3620 }
3621
3622 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3623 {
3624 /* FIXME: need locking over ps_status ??? */
3625 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3626
3627 if (sta_id != IWL_INVALID_STATION) {
3628 u8 sta_awake = priv->stations[sta_id].
3629 ps_status == STA_PS_STATUS_WAKE;
3630
3631 if (sta_awake && ps_bit)
3632 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3633 else if (!sta_awake && !ps_bit) {
3634 iwl4965_sta_modify_ps_wake(priv, sta_id);
3635 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3636 }
3637 }
3638 }
3639 #ifdef CONFIG_IWLWIFI_DEBUG
3640
3641 /**
3642 * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3643 *
3644 * You may hack this function to show different aspects of received frames,
3645 * including selective frame dumps.
3646 * group100 parameter selects whether to show 1 out of 100 good frames.
3647 *
3648 * TODO: This was originally written for 3945, need to audit for
3649 * proper operation with 4965.
3650 */
3651 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3652 struct iwl4965_rx_packet *pkt,
3653 struct ieee80211_hdr *header, int group100)
3654 {
3655 u32 to_us;
3656 u32 print_summary = 0;
3657 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
3658 u32 hundred = 0;
3659 u32 dataframe = 0;
3660 u16 fc;
3661 u16 seq_ctl;
3662 u16 channel;
3663 u16 phy_flags;
3664 int rate_sym;
3665 u16 length;
3666 u16 status;
3667 u16 bcn_tmr;
3668 u32 tsf_low;
3669 u64 tsf;
3670 u8 rssi;
3671 u8 agc;
3672 u16 sig_avg;
3673 u16 noise_diff;
3674 struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3675 struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3676 struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3677 u8 *data = IWL_RX_DATA(pkt);
3678
3679 if (likely(!(iwl_debug_level & IWL_DL_RX)))
3680 return;
3681
3682 /* MAC header */
3683 fc = le16_to_cpu(header->frame_control);
3684 seq_ctl = le16_to_cpu(header->seq_ctrl);
3685
3686 /* metadata */
3687 channel = le16_to_cpu(rx_hdr->channel);
3688 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3689 rate_sym = rx_hdr->rate;
3690 length = le16_to_cpu(rx_hdr->len);
3691
3692 /* end-of-frame status and timestamp */
3693 status = le32_to_cpu(rx_end->status);
3694 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3695 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3696 tsf = le64_to_cpu(rx_end->timestamp);
3697
3698 /* signal statistics */
3699 rssi = rx_stats->rssi;
3700 agc = rx_stats->agc;
3701 sig_avg = le16_to_cpu(rx_stats->sig_avg);
3702 noise_diff = le16_to_cpu(rx_stats->noise_diff);
3703
3704 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3705
3706 /* if data frame is to us and all is good,
3707 * (optionally) print summary for only 1 out of every 100 */
3708 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3709 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3710 dataframe = 1;
3711 if (!group100)
3712 print_summary = 1; /* print each frame */
3713 else if (priv->framecnt_to_us < 100) {
3714 priv->framecnt_to_us++;
3715 print_summary = 0;
3716 } else {
3717 priv->framecnt_to_us = 0;
3718 print_summary = 1;
3719 hundred = 1;
3720 }
3721 } else {
3722 /* print summary for all other frames */
3723 print_summary = 1;
3724 }
3725
3726 if (print_summary) {
3727 char *title;
3728 int rate_idx;
3729 u32 bitrate;
3730
3731 if (hundred)
3732 title = "100Frames";
3733 else if (fc & IEEE80211_FCTL_RETRY)
3734 title = "Retry";
3735 else if (ieee80211_is_assoc_response(fc))
3736 title = "AscRsp";
3737 else if (ieee80211_is_reassoc_response(fc))
3738 title = "RasRsp";
3739 else if (ieee80211_is_probe_response(fc)) {
3740 title = "PrbRsp";
3741 print_dump = 1; /* dump frame contents */
3742 } else if (ieee80211_is_beacon(fc)) {
3743 title = "Beacon";
3744 print_dump = 1; /* dump frame contents */
3745 } else if (ieee80211_is_atim(fc))
3746 title = "ATIM";
3747 else if (ieee80211_is_auth(fc))
3748 title = "Auth";
3749 else if (ieee80211_is_deauth(fc))
3750 title = "DeAuth";
3751 else if (ieee80211_is_disassoc(fc))
3752 title = "DisAssoc";
3753 else
3754 title = "Frame";
3755
3756 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3757 if (unlikely(rate_idx == -1))
3758 bitrate = 0;
3759 else
3760 bitrate = iwl4965_rates[rate_idx].ieee / 2;
3761
3762 /* print frame summary.
3763 * MAC addresses show just the last byte (for brevity),
3764 * but you can hack it to show more, if you'd like to. */
3765 if (dataframe)
3766 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3767 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3768 title, fc, header->addr1[5],
3769 length, rssi, channel, bitrate);
3770 else {
3771 /* src/dst addresses assume managed mode */
3772 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3773 "src=0x%02x, rssi=%u, tim=%lu usec, "
3774 "phy=0x%02x, chnl=%d\n",
3775 title, fc, header->addr1[5],
3776 header->addr3[5], rssi,
3777 tsf_low - priv->scan_start_tsf,
3778 phy_flags, channel);
3779 }
3780 }
3781 if (print_dump)
3782 iwl_print_hex_dump(IWL_DL_RX, data, length);
3783 }
3784 #else
3785 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3786 struct iwl4965_rx_packet *pkt,
3787 struct ieee80211_hdr *header,
3788 int group100)
3789 {
3790 }
3791 #endif
3792
3793
3794
3795 /* Called for REPLY_RX (legacy ABG frames), or
3796 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3797 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3798 struct iwl4965_rx_mem_buffer *rxb)
3799 {
3800 struct ieee80211_hdr *header;
3801 struct ieee80211_rx_status rx_status;
3802 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3803 /* Use phy data (Rx signal strength, etc.) contained within
3804 * this rx packet for legacy frames,
3805 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3806 int include_phy = (pkt->hdr.cmd == REPLY_RX);
3807 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3808 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3809 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3810 __le32 *rx_end;
3811 unsigned int len = 0;
3812 u16 fc;
3813 u8 network_packet;
3814
3815 rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3816 rx_status.freq = ieee80211chan2mhz(le16_to_cpu(rx_start->channel));
3817 rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3818 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3819 rx_status.rate_idx = iwl4965_hwrate_to_plcp_idx(
3820 le32_to_cpu(rx_start->rate_n_flags));
3821
3822 if (rx_status.band == IEEE80211_BAND_5GHZ)
3823 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3824
3825 rx_status.antenna = 0;
3826 rx_status.flag = 0;
3827
3828 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3829 IWL_DEBUG_DROP
3830 ("dsp size out of range [0,20]: "
3831 "%d/n", rx_start->cfg_phy_cnt);
3832 return;
3833 }
3834
3835 if (!include_phy) {
3836 if (priv->last_phy_res[0])
3837 rx_start = (struct iwl4965_rx_phy_res *)
3838 &priv->last_phy_res[1];
3839 else
3840 rx_start = NULL;
3841 }
3842
3843 if (!rx_start) {
3844 IWL_ERROR("MPDU frame without a PHY data\n");
3845 return;
3846 }
3847
3848 if (include_phy) {
3849 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3850 + rx_start->cfg_phy_cnt);
3851
3852 len = le16_to_cpu(rx_start->byte_count);
3853 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3854 sizeof(struct iwl4965_rx_phy_res) + len);
3855 } else {
3856 struct iwl4965_rx_mpdu_res_start *amsdu =
3857 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3858
3859 header = (void *)(pkt->u.raw +
3860 sizeof(struct iwl4965_rx_mpdu_res_start));
3861 len = le16_to_cpu(amsdu->byte_count);
3862 rx_end = (__le32 *) (pkt->u.raw +
3863 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3864 }
3865
3866 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3867 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3868 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3869 le32_to_cpu(*rx_end));
3870 return;
3871 }
3872
3873 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3874
3875 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3876 rx_status.ssi = iwl4965_calc_rssi(rx_start);
3877
3878 /* Meaningful noise values are available only from beacon statistics,
3879 * which are gathered only when associated, and indicate noise
3880 * only for the associated network channel ...
3881 * Ignore these noise values while scanning (other channels) */
3882 if (iwl_is_associated(priv) &&
3883 !test_bit(STATUS_SCANNING, &priv->status)) {
3884 rx_status.noise = priv->last_rx_noise;
3885 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
3886 rx_status.noise);
3887 } else {
3888 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3889 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
3890 }
3891
3892 /* Reset beacon noise level if not associated. */
3893 if (!iwl_is_associated(priv))
3894 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3895
3896 /* Set "1" to report good data frames in groups of 100 */
3897 /* FIXME: need to optimze the call: */
3898 iwl4965_dbg_report_frame(priv, pkt, header, 1);
3899
3900 IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
3901 rx_status.ssi, rx_status.noise, rx_status.signal,
3902 (unsigned long long)rx_status.mactime);
3903
3904 network_packet = iwl4965_is_network_packet(priv, header);
3905 if (network_packet) {
3906 priv->last_rx_rssi = rx_status.ssi;
3907 priv->last_beacon_time = priv->ucode_beacon_time;
3908 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3909 }
3910
3911 fc = le16_to_cpu(header->frame_control);
3912 switch (fc & IEEE80211_FCTL_FTYPE) {
3913 case IEEE80211_FTYPE_MGMT:
3914 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3915 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3916 header->addr2);
3917 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3918 break;
3919
3920 case IEEE80211_FTYPE_CTL:
3921 #ifdef CONFIG_IWL4965_HT
3922 switch (fc & IEEE80211_FCTL_STYPE) {
3923 case IEEE80211_STYPE_BACK_REQ:
3924 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3925 iwl4965_handle_data_packet(priv, 0, include_phy,
3926 rxb, &rx_status);
3927 break;
3928 default:
3929 break;
3930 }
3931 #endif
3932 break;
3933
3934 case IEEE80211_FTYPE_DATA: {
3935 DECLARE_MAC_BUF(mac1);
3936 DECLARE_MAC_BUF(mac2);
3937 DECLARE_MAC_BUF(mac3);
3938
3939 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3940 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3941 header->addr2);
3942
3943 if (unlikely(!network_packet))
3944 IWL_DEBUG_DROP("Dropping (non network): "
3945 "%s, %s, %s\n",
3946 print_mac(mac1, header->addr1),
3947 print_mac(mac2, header->addr2),
3948 print_mac(mac3, header->addr3));
3949 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3950 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3951 print_mac(mac1, header->addr1),
3952 print_mac(mac2, header->addr2),
3953 print_mac(mac3, header->addr3));
3954 else
3955 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3956 &rx_status);
3957 break;
3958 }
3959 default:
3960 break;
3961
3962 }
3963 }
3964
3965 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3966 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3967 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
3968 struct iwl4965_rx_mem_buffer *rxb)
3969 {
3970 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3971 priv->last_phy_res[0] = 1;
3972 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3973 sizeof(struct iwl4965_rx_phy_res));
3974 }
3975 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
3976 struct iwl4965_rx_mem_buffer *rxb)
3977
3978 {
3979 #ifdef CONFIG_IWL4965_SENSITIVITY
3980 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3981 struct iwl4965_missed_beacon_notif *missed_beacon;
3982
3983 missed_beacon = &pkt->u.missed_beacon;
3984 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3985 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3986 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3987 le32_to_cpu(missed_beacon->total_missed_becons),
3988 le32_to_cpu(missed_beacon->num_recvd_beacons),
3989 le32_to_cpu(missed_beacon->num_expected_beacons));
3990 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
3991 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
3992 queue_work(priv->workqueue, &priv->sensitivity_work);
3993 }
3994 #endif /*CONFIG_IWL4965_SENSITIVITY*/
3995 }
3996 #ifdef CONFIG_IWL4965_HT
3997
3998 /**
3999 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4000 */
4001 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4002 int sta_id, int tid)
4003 {
4004 unsigned long flags;
4005
4006 /* Remove "disable" flag, to enable Tx for this TID */
4007 spin_lock_irqsave(&priv->sta_lock, flags);
4008 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4009 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4010 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4011 spin_unlock_irqrestore(&priv->sta_lock, flags);
4012
4013 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4014 }
4015
4016 /**
4017 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4018 *
4019 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4020 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4021 */
4022 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4023 struct iwl4965_ht_agg *agg,
4024 struct iwl4965_compressed_ba_resp*
4025 ba_resp)
4026
4027 {
4028 int i, sh, ack;
4029 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4030 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4031 u64 bitmap;
4032 int successes = 0;
4033 struct ieee80211_tx_status *tx_status;
4034
4035 if (unlikely(!agg->wait_for_ba)) {
4036 IWL_ERROR("Received BA when not expected\n");
4037 return -EINVAL;
4038 }
4039
4040 /* Mark that the expected block-ack response arrived */
4041 agg->wait_for_ba = 0;
4042 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4043
4044 /* Calculate shift to align block-ack bits with our Tx window bits */
4045 sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4046 if (sh < 0) /* tbw something is wrong with indices */
4047 sh += 0x100;
4048
4049 /* don't use 64-bit values for now */
4050 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4051
4052 if (agg->frame_count > (64 - sh)) {
4053 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4054 return -1;
4055 }
4056
4057 /* check for success or failure according to the
4058 * transmitted bitmap and block-ack bitmap */
4059 bitmap &= agg->bitmap;
4060
4061 /* For each frame attempted in aggregation,
4062 * update driver's record of tx frame's status. */
4063 for (i = 0; i < agg->frame_count ; i++) {
4064 ack = bitmap & (1 << i);
4065 successes += !!ack;
4066 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4067 ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4068 agg->start_idx + i);
4069 }
4070
4071 tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4072 tx_status->flags = IEEE80211_TX_STATUS_ACK;
4073 tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4074 tx_status->ampdu_ack_map = successes;
4075 tx_status->ampdu_ack_len = agg->frame_count;
4076 iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4077 &tx_status->control);
4078
4079 IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4080
4081 return 0;
4082 }
4083
4084 /**
4085 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4086 */
4087 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
4088 u16 txq_id)
4089 {
4090 /* Simply stop the queue, but don't change any configuration;
4091 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4092 iwl_write_prph(priv,
4093 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4094 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4095 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4096 }
4097
4098 /**
4099 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4100 * priv->lock must be held by the caller
4101 */
4102 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4103 u16 ssn_idx, u8 tx_fifo)
4104 {
4105 int ret = 0;
4106
4107 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4108 IWL_WARNING("queue number too small: %d, must be > %d\n",
4109 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4110 return -EINVAL;
4111 }
4112
4113 ret = iwl_grab_nic_access(priv);
4114 if (ret)
4115 return ret;
4116
4117 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4118
4119 iwl_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4120
4121 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4122 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4123 /* supposes that ssn_idx is valid (!= 0xFFF) */
4124 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4125
4126 iwl_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4127 iwl4965_txq_ctx_deactivate(priv, txq_id);
4128 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4129
4130 iwl_release_nic_access(priv);
4131
4132 return 0;
4133 }
4134
4135 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
4136 u8 tid, int txq_id)
4137 {
4138 struct iwl4965_queue *q = &priv->txq[txq_id].q;
4139 u8 *addr = priv->stations[sta_id].sta.sta.addr;
4140 struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4141
4142 switch (priv->stations[sta_id].tid[tid].agg.state) {
4143 case IWL_EMPTYING_HW_QUEUE_DELBA:
4144 /* We are reclaiming the last packet of the */
4145 /* aggregated HW queue */
4146 if (txq_id == tid_data->agg.txq_id &&
4147 q->read_ptr == q->write_ptr) {
4148 u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4149 int tx_fifo = default_tid_to_tx_fifo[tid];
4150 IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4151 iwl4965_tx_queue_agg_disable(priv, txq_id,
4152 ssn, tx_fifo);
4153 tid_data->agg.state = IWL_AGG_OFF;
4154 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4155 }
4156 break;
4157 case IWL_EMPTYING_HW_QUEUE_ADDBA:
4158 /* We are reclaiming the last packet of the queue */
4159 if (tid_data->tfds_in_queue == 0) {
4160 IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4161 tid_data->agg.state = IWL_AGG_ON;
4162 ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4163 }
4164 break;
4165 }
4166 return 0;
4167 }
4168
4169 /**
4170 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4171 * @index -- current index
4172 * @n_bd -- total number of entries in queue (s/b power of 2)
4173 */
4174 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4175 {
4176 return (index == 0) ? n_bd - 1 : index - 1;
4177 }
4178
4179 /**
4180 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4181 *
4182 * Handles block-acknowledge notification from device, which reports success
4183 * of frames sent via aggregation.
4184 */
4185 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4186 struct iwl4965_rx_mem_buffer *rxb)
4187 {
4188 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4189 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4190 int index;
4191 struct iwl4965_tx_queue *txq = NULL;
4192 struct iwl4965_ht_agg *agg;
4193 DECLARE_MAC_BUF(mac);
4194
4195 /* "flow" corresponds to Tx queue */
4196 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4197
4198 /* "ssn" is start of block-ack Tx window, corresponds to index
4199 * (in Tx queue's circular buffer) of first TFD/frame in window */
4200 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4201
4202 if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4203 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4204 return;
4205 }
4206
4207 txq = &priv->txq[scd_flow];
4208 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4209
4210 /* Find index just before block-ack window */
4211 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4212
4213 /* TODO: Need to get this copy more safely - now good for debug */
4214
4215 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4216 "sta_id = %d\n",
4217 agg->wait_for_ba,
4218 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4219 ba_resp->sta_id);
4220 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4221 "%d, scd_ssn = %d\n",
4222 ba_resp->tid,
4223 ba_resp->seq_ctl,
4224 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4225 ba_resp->scd_flow,
4226 ba_resp->scd_ssn);
4227 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4228 agg->start_idx,
4229 (unsigned long long)agg->bitmap);
4230
4231 /* Update driver's record of ACK vs. not for each frame in window */
4232 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4233
4234 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4235 * block-ack window (we assume that they've been successfully
4236 * transmitted ... if not, it's too late anyway). */
4237 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4238 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4239 priv->stations[ba_resp->sta_id].
4240 tid[ba_resp->tid].tfds_in_queue -= freed;
4241 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4242 priv->mac80211_registered &&
4243 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4244 ieee80211_wake_queue(priv->hw, scd_flow);
4245 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4246 ba_resp->tid, scd_flow);
4247 }
4248 }
4249
4250 /**
4251 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4252 */
4253 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4254 u16 txq_id)
4255 {
4256 u32 tbl_dw_addr;
4257 u32 tbl_dw;
4258 u16 scd_q2ratid;
4259
4260 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4261
4262 tbl_dw_addr = priv->scd_base_addr +
4263 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4264
4265 tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
4266
4267 if (txq_id & 0x1)
4268 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4269 else
4270 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4271
4272 iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4273
4274 return 0;
4275 }
4276
4277
4278 /**
4279 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4280 *
4281 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4282 * i.e. it must be one of the higher queues used for aggregation
4283 */
4284 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4285 int tx_fifo, int sta_id, int tid,
4286 u16 ssn_idx)
4287 {
4288 unsigned long flags;
4289 int rc;
4290 u16 ra_tid;
4291
4292 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4293 IWL_WARNING("queue number too small: %d, must be > %d\n",
4294 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4295
4296 ra_tid = BUILD_RAxTID(sta_id, tid);
4297
4298 /* Modify device's station table to Tx this TID */
4299 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4300
4301 spin_lock_irqsave(&priv->lock, flags);
4302 rc = iwl_grab_nic_access(priv);
4303 if (rc) {
4304 spin_unlock_irqrestore(&priv->lock, flags);
4305 return rc;
4306 }
4307
4308 /* Stop this Tx queue before configuring it */
4309 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4310
4311 /* Map receiver-address / traffic-ID to this queue */
4312 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4313
4314 /* Set this queue as a chain-building queue */
4315 iwl_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4316
4317 /* Place first TFD at index corresponding to start sequence number.
4318 * Assumes that ssn_idx is valid (!= 0xFFF) */
4319 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4320 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4321 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4322
4323 /* Set up Tx window size and frame limit for this queue */
4324 iwl_write_targ_mem(priv,
4325 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4326 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4327 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4328
4329 iwl_write_targ_mem(priv, priv->scd_base_addr +
4330 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4331 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4332 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4333
4334 iwl_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4335
4336 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4337 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4338
4339 iwl_release_nic_access(priv);
4340 spin_unlock_irqrestore(&priv->lock, flags);
4341
4342 return 0;
4343 }
4344
4345 #endif /* CONFIG_IWL4965_HT */
4346
4347 /**
4348 * iwl4965_add_station - Initialize a station's hardware rate table
4349 *
4350 * The uCode's station table contains a table of fallback rates
4351 * for automatic fallback during transmission.
4352 *
4353 * NOTE: This sets up a default set of values. These will be replaced later
4354 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4355 * rc80211_simple.
4356 *
4357 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4358 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4359 * which requires station table entry to exist).
4360 */
4361 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4362 {
4363 int i, r;
4364 struct iwl4965_link_quality_cmd link_cmd = {
4365 .reserved1 = 0,
4366 };
4367 u16 rate_flags;
4368
4369 /* Set up the rate scaling to start at selected rate, fall back
4370 * all the way down to 1M in IEEE order, and then spin on 1M */
4371 if (is_ap)
4372 r = IWL_RATE_54M_INDEX;
4373 else if (priv->band == IEEE80211_BAND_5GHZ)
4374 r = IWL_RATE_6M_INDEX;
4375 else
4376 r = IWL_RATE_1M_INDEX;
4377
4378 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4379 rate_flags = 0;
4380 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4381 rate_flags |= RATE_MCS_CCK_MSK;
4382
4383 /* Use Tx antenna B only */
4384 rate_flags |= RATE_MCS_ANT_B_MSK;
4385 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4386
4387 link_cmd.rs_table[i].rate_n_flags =
4388 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4389 r = iwl4965_get_prev_ieee_rate(r);
4390 }
4391
4392 link_cmd.general_params.single_stream_ant_msk = 2;
4393 link_cmd.general_params.dual_stream_ant_msk = 3;
4394 link_cmd.agg_params.agg_dis_start_th = 3;
4395 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4396
4397 /* Update the rate scaling for control frame Tx to AP */
4398 link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_setting.bcast_sta_id;
4399
4400 iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
4401 sizeof(link_cmd), &link_cmd, NULL);
4402 }
4403
4404 #ifdef CONFIG_IWL4965_HT
4405
4406 static u8 iwl4965_is_channel_extension(struct iwl_priv *priv,
4407 enum ieee80211_band band,
4408 u16 channel, u8 extension_chan_offset)
4409 {
4410 const struct iwl_channel_info *ch_info;
4411
4412 ch_info = iwl_get_channel_info(priv, band, channel);
4413 if (!is_channel_valid(ch_info))
4414 return 0;
4415
4416 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4417 return 0;
4418
4419 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4420 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4421 return 1;
4422
4423 return 0;
4424 }
4425
4426 static u8 iwl4965_is_fat_tx_allowed(struct iwl_priv *priv,
4427 struct ieee80211_ht_info *sta_ht_inf)
4428 {
4429 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4430
4431 if ((!iwl_ht_conf->is_ht) ||
4432 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4433 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4434 return 0;
4435
4436 if (sta_ht_inf) {
4437 if ((!sta_ht_inf->ht_supported) ||
4438 (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4439 return 0;
4440 }
4441
4442 return (iwl4965_is_channel_extension(priv, priv->band,
4443 iwl_ht_conf->control_channel,
4444 iwl_ht_conf->extension_chan_offset));
4445 }
4446
4447 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
4448 {
4449 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4450 u32 val;
4451
4452 if (!ht_info->is_ht)
4453 return;
4454
4455 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4456 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4457 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4458 else
4459 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4460 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4461
4462 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4463 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4464 le16_to_cpu(rxon->channel),
4465 ht_info->control_channel);
4466 rxon->channel = cpu_to_le16(ht_info->control_channel);
4467 return;
4468 }
4469
4470 /* Note: control channel is opposite of extension channel */
4471 switch (ht_info->extension_chan_offset) {
4472 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4473 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4474 break;
4475 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4476 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4477 break;
4478 case IWL_EXT_CHANNEL_OFFSET_NONE:
4479 default:
4480 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4481 break;
4482 }
4483
4484 val = ht_info->ht_protection;
4485
4486 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4487
4488 iwl4965_set_rxon_chain(priv);
4489
4490 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4491 "rxon flags 0x%X operation mode :0x%X "
4492 "extension channel offset 0x%x "
4493 "control chan %d\n",
4494 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4495 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4496 ht_info->extension_chan_offset,
4497 ht_info->control_channel);
4498 return;
4499 }
4500
4501 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index,
4502 struct ieee80211_ht_info *sta_ht_inf)
4503 {
4504 __le32 sta_flags;
4505 u8 mimo_ps_mode;
4506
4507 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4508 goto done;
4509
4510 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4511
4512 sta_flags = priv->stations[index].sta.station_flags;
4513
4514 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4515
4516 switch (mimo_ps_mode) {
4517 case WLAN_HT_CAP_MIMO_PS_STATIC:
4518 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4519 break;
4520 case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4521 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4522 break;
4523 case WLAN_HT_CAP_MIMO_PS_DISABLED:
4524 break;
4525 default:
4526 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4527 break;
4528 }
4529
4530 sta_flags |= cpu_to_le32(
4531 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4532
4533 sta_flags |= cpu_to_le32(
4534 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4535
4536 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4537 sta_flags |= STA_FLG_FAT_EN_MSK;
4538 else
4539 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4540
4541 priv->stations[index].sta.station_flags = sta_flags;
4542 done:
4543 return;
4544 }
4545
4546 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4547 int sta_id, int tid, u16 ssn)
4548 {
4549 unsigned long flags;
4550
4551 spin_lock_irqsave(&priv->sta_lock, flags);
4552 priv->stations[sta_id].sta.station_flags_msk = 0;
4553 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4554 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4555 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4556 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4557 spin_unlock_irqrestore(&priv->sta_lock, flags);
4558
4559 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4560 }
4561
4562 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4563 int sta_id, int tid)
4564 {
4565 unsigned long flags;
4566
4567 spin_lock_irqsave(&priv->sta_lock, flags);
4568 priv->stations[sta_id].sta.station_flags_msk = 0;
4569 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4570 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4571 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4572 spin_unlock_irqrestore(&priv->sta_lock, flags);
4573
4574 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4575 }
4576
4577 /*
4578 * Find first available (lowest unused) Tx Queue, mark it "active".
4579 * Called only when finding queue for aggregation.
4580 * Should never return anything < 7, because they should already
4581 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4582 */
4583 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
4584 {
4585 int txq_id;
4586
4587 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4588 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4589 return txq_id;
4590 return -1;
4591 }
4592
4593 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4594 u16 tid, u16 *start_seq_num)
4595 {
4596 struct iwl_priv *priv = hw->priv;
4597 int sta_id;
4598 int tx_fifo;
4599 int txq_id;
4600 int ssn = -1;
4601 int ret = 0;
4602 unsigned long flags;
4603 struct iwl4965_tid_data *tid_data;
4604 DECLARE_MAC_BUF(mac);
4605
4606 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4607 tx_fifo = default_tid_to_tx_fifo[tid];
4608 else
4609 return -EINVAL;
4610
4611 IWL_WARNING("%s on da = %s tid = %d\n",
4612 __func__, print_mac(mac, da), tid);
4613
4614 sta_id = iwl4965_hw_find_station(priv, da);
4615 if (sta_id == IWL_INVALID_STATION)
4616 return -ENXIO;
4617
4618 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4619 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4620 return -ENXIO;
4621 }
4622
4623 txq_id = iwl4965_txq_ctx_activate_free(priv);
4624 if (txq_id == -1)
4625 return -ENXIO;
4626
4627 spin_lock_irqsave(&priv->sta_lock, flags);
4628 tid_data = &priv->stations[sta_id].tid[tid];
4629 ssn = SEQ_TO_SN(tid_data->seq_number);
4630 tid_data->agg.txq_id = txq_id;
4631 spin_unlock_irqrestore(&priv->sta_lock, flags);
4632
4633 *start_seq_num = ssn;
4634 ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4635 sta_id, tid, ssn);
4636 if (ret)
4637 return ret;
4638
4639 ret = 0;
4640 if (tid_data->tfds_in_queue == 0) {
4641 printk(KERN_ERR "HW queue is empty\n");
4642 tid_data->agg.state = IWL_AGG_ON;
4643 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4644 } else {
4645 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4646 tid_data->tfds_in_queue);
4647 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4648 }
4649 return ret;
4650 }
4651
4652 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4653 u16 tid)
4654 {
4655
4656 struct iwl_priv *priv = hw->priv;
4657 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4658 struct iwl4965_tid_data *tid_data;
4659 int ret, write_ptr, read_ptr;
4660 unsigned long flags;
4661 DECLARE_MAC_BUF(mac);
4662
4663 if (!da) {
4664 IWL_ERROR("da = NULL\n");
4665 return -EINVAL;
4666 }
4667
4668 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4669 tx_fifo_id = default_tid_to_tx_fifo[tid];
4670 else
4671 return -EINVAL;
4672
4673 sta_id = iwl4965_hw_find_station(priv, da);
4674
4675 if (sta_id == IWL_INVALID_STATION)
4676 return -ENXIO;
4677
4678 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4679 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4680
4681 tid_data = &priv->stations[sta_id].tid[tid];
4682 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4683 txq_id = tid_data->agg.txq_id;
4684 write_ptr = priv->txq[txq_id].q.write_ptr;
4685 read_ptr = priv->txq[txq_id].q.read_ptr;
4686
4687 /* The queue is not empty */
4688 if (write_ptr != read_ptr) {
4689 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4690 priv->stations[sta_id].tid[tid].agg.state =
4691 IWL_EMPTYING_HW_QUEUE_DELBA;
4692 return 0;
4693 }
4694
4695 IWL_DEBUG_HT("HW queue empty\n");;
4696 priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4697
4698 spin_lock_irqsave(&priv->lock, flags);
4699 ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4700 spin_unlock_irqrestore(&priv->lock, flags);
4701
4702 if (ret)
4703 return ret;
4704
4705 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4706
4707 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4708 print_mac(mac, da), tid);
4709
4710 return 0;
4711 }
4712
4713 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4714 enum ieee80211_ampdu_mlme_action action,
4715 const u8 *addr, u16 tid, u16 *ssn)
4716 {
4717 struct iwl_priv *priv = hw->priv;
4718 int sta_id;
4719 DECLARE_MAC_BUF(mac);
4720
4721 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4722 print_mac(mac, addr), tid);
4723 sta_id = iwl4965_hw_find_station(priv, addr);
4724 switch (action) {
4725 case IEEE80211_AMPDU_RX_START:
4726 IWL_DEBUG_HT("start Rx\n");
4727 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4728 break;
4729 case IEEE80211_AMPDU_RX_STOP:
4730 IWL_DEBUG_HT("stop Rx\n");
4731 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4732 break;
4733 case IEEE80211_AMPDU_TX_START:
4734 IWL_DEBUG_HT("start Tx\n");
4735 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4736 case IEEE80211_AMPDU_TX_STOP:
4737 IWL_DEBUG_HT("stop Tx\n");
4738 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4739 default:
4740 IWL_DEBUG_HT("unknown\n");
4741 return -EINVAL;
4742 break;
4743 }
4744 return 0;
4745 }
4746
4747 #endif /* CONFIG_IWL4965_HT */
4748
4749 /* Set up 4965-specific Rx frame reply handlers */
4750 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
4751 {
4752 /* Legacy Rx frames */
4753 priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
4754
4755 /* High-throughput (HT) Rx frames */
4756 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4757 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4758
4759 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4760 iwl4965_rx_missed_beacon_notif;
4761
4762 #ifdef CONFIG_IWL4965_HT
4763 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4764 #endif /* CONFIG_IWL4965_HT */
4765 }
4766
4767 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
4768 {
4769 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4770 INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4771 #ifdef CONFIG_IWL4965_SENSITIVITY
4772 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4773 #endif
4774 init_timer(&priv->statistics_periodic);
4775 priv->statistics_periodic.data = (unsigned long)priv;
4776 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4777 }
4778
4779 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4780 {
4781 del_timer_sync(&priv->statistics_periodic);
4782
4783 cancel_delayed_work(&priv->init_alive_start);
4784 }
4785
4786 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
4787 .enqueue_hcmd = iwl4965_enqueue_hcmd,
4788 };
4789
4790 static struct iwl_lib_ops iwl4965_lib = {
4791 .init_drv = iwl4965_init_drv,
4792 .eeprom_ops = {
4793 .verify_signature = iwlcore_eeprom_verify_signature,
4794 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4795 .release_semaphore = iwlcore_eeprom_release_semaphore,
4796 },
4797 .radio_kill_sw = iwl4965_radio_kill_sw,
4798 };
4799
4800 static struct iwl_ops iwl4965_ops = {
4801 .lib = &iwl4965_lib,
4802 .utils = &iwl4965_hcmd_utils,
4803 };
4804
4805 static struct iwl_cfg iwl4965_agn_cfg = {
4806 .name = "4965AGN",
4807 .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4808 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4809 .ops = &iwl4965_ops,
4810 .mod_params = &iwl4965_mod_params,
4811 };
4812
4813 struct pci_device_id iwl4965_hw_card_ids[] = {
4814 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4815 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4816 {0}
4817 };
4818
4819 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
4820
4821 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
4822 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4823 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
4824 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
4825 module_param_named(hwcrypto, iwl4965_mod_params.hw_crypto, int, 0444);
4826 MODULE_PARM_DESC(hwcrypto,
4827 "using hardware crypto engine (default 0 [software])\n");
4828 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
4829 MODULE_PARM_DESC(debug, "debug output mask");
4830 module_param_named(
4831 disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
4832 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4833
4834 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
4835 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4836
4837 /* QoS */
4838 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
4839 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
4840 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
4841 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
4842
Linux kernel - Deliverables
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