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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / drivers / net / wireless / iwlwifi / iwl-4965.c
blobd727de8b96fef956d3020bdde0428336ebb9d7a1
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2007 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-4965.h"
42 #include "iwl-helpers.h"
43
44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
45
46 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
47 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
48 IWL_RATE_SISO_##s##M_PLCP, \
49 IWL_RATE_MIMO_##s##M_PLCP, \
50 IWL_RATE_##r##M_IEEE, \
51 IWL_RATE_##ip##M_INDEX, \
52 IWL_RATE_##in##M_INDEX, \
53 IWL_RATE_##rp##M_INDEX, \
54 IWL_RATE_##rn##M_INDEX, \
55 IWL_RATE_##pp##M_INDEX, \
56 IWL_RATE_##np##M_INDEX }
57
58 /*
59 * Parameter order:
60 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
61 *
62 * If there isn't a valid next or previous rate then INV is used which
63 * maps to IWL_RATE_INVALID
64 *
65 */
66 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
67 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
68 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
69 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
70 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
71 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
72 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
73 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
74 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
75 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
76 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
77 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
78 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
79 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
80 };
81
82 static int is_fat_channel(__le32 rxon_flags)
83 {
84 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
85 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
86 }
87
88 static u8 is_single_stream(struct iwl4965_priv *priv)
89 {
90 #ifdef CONFIG_IWL4965_HT
91 if (!priv->current_ht_config.is_ht ||
92 (priv->current_ht_config.supp_mcs_set[1] == 0) ||
93 (priv->ps_mode == IWL_MIMO_PS_STATIC))
94 return 1;
95 #else
96 return 1;
97 #endif /*CONFIG_IWL4965_HT */
98 return 0;
99 }
100
101 /*
102 * Determine how many receiver/antenna chains to use.
103 * More provides better reception via diversity. Fewer saves power.
104 * MIMO (dual stream) requires at least 2, but works better with 3.
105 * This does not determine *which* chains to use, just how many.
106 */
107 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
108 u8 *idle_state, u8 *rx_state)
109 {
110 u8 is_single = is_single_stream(priv);
111 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
112
113 /* # of Rx chains to use when expecting MIMO. */
114 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
115 *rx_state = 2;
116 else
117 *rx_state = 3;
118
119 /* # Rx chains when idling and maybe trying to save power */
120 switch (priv->ps_mode) {
121 case IWL_MIMO_PS_STATIC:
122 case IWL_MIMO_PS_DYNAMIC:
123 *idle_state = (is_cam) ? 2 : 1;
124 break;
125 case IWL_MIMO_PS_NONE:
126 *idle_state = (is_cam) ? *rx_state : 1;
127 break;
128 default:
129 *idle_state = 1;
130 break;
131 }
132
133 return 0;
134 }
135
136 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
137 {
138 int rc;
139 unsigned long flags;
140
141 spin_lock_irqsave(&priv->lock, flags);
142 rc = iwl4965_grab_nic_access(priv);
143 if (rc) {
144 spin_unlock_irqrestore(&priv->lock, flags);
145 return rc;
146 }
147
148 /* stop Rx DMA */
149 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
150 rc = iwl4965_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
151 (1 << 24), 1000);
152 if (rc < 0)
153 IWL_ERROR("Can't stop Rx DMA.\n");
154
155 iwl4965_release_nic_access(priv);
156 spin_unlock_irqrestore(&priv->lock, flags);
157
158 return 0;
159 }
160
161 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
162 {
163 int i;
164 int start = 0;
165 int ret = IWL_INVALID_STATION;
166 unsigned long flags;
167 DECLARE_MAC_BUF(mac);
168
169 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
170 (priv->iw_mode == IEEE80211_IF_TYPE_AP))
171 start = IWL_STA_ID;
172
173 if (is_broadcast_ether_addr(addr))
174 return IWL4965_BROADCAST_ID;
175
176 spin_lock_irqsave(&priv->sta_lock, flags);
177 for (i = start; i < priv->hw_setting.max_stations; i++)
178 if ((priv->stations[i].used) &&
179 (!compare_ether_addr
180 (priv->stations[i].sta.sta.addr, addr))) {
181 ret = i;
182 goto out;
183 }
184
185 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
186 print_mac(mac, addr), priv->num_stations);
187
188 out:
189 spin_unlock_irqrestore(&priv->sta_lock, flags);
190 return ret;
191 }
192
193 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
194 {
195 int ret;
196 unsigned long flags;
197
198 spin_lock_irqsave(&priv->lock, flags);
199 ret = iwl4965_grab_nic_access(priv);
200 if (ret) {
201 spin_unlock_irqrestore(&priv->lock, flags);
202 return ret;
203 }
204
205 if (!pwr_max) {
206 u32 val;
207
208 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
209 &val);
210
211 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
212 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
213 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
214 ~APMG_PS_CTRL_MSK_PWR_SRC);
215 } else
216 iwl4965_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
217 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
218 ~APMG_PS_CTRL_MSK_PWR_SRC);
219
220 iwl4965_release_nic_access(priv);
221 spin_unlock_irqrestore(&priv->lock, flags);
222
223 return ret;
224 }
225
226 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
227 {
228 int rc;
229 unsigned long flags;
230 unsigned int rb_size;
231
232 spin_lock_irqsave(&priv->lock, flags);
233 rc = iwl4965_grab_nic_access(priv);
234 if (rc) {
235 spin_unlock_irqrestore(&priv->lock, flags);
236 return rc;
237 }
238
239 if (iwl4965_param_amsdu_size_8K)
240 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
241 else
242 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
243
244 /* Stop Rx DMA */
245 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
246
247 /* Reset driver's Rx queue write index */
248 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
249
250 /* Tell device where to find RBD circular buffer in DRAM */
251 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
252 rxq->dma_addr >> 8);
253
254 /* Tell device where in DRAM to update its Rx status */
255 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
256 (priv->hw_setting.shared_phys +
257 offsetof(struct iwl4965_shared, val0)) >> 4);
258
259 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
260 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
261 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
262 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
263 rb_size |
264 /*0x10 << 4 | */
265 (RX_QUEUE_SIZE_LOG <<
266 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
267
268 /*
269 * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
270 */
271
272 iwl4965_release_nic_access(priv);
273 spin_unlock_irqrestore(&priv->lock, flags);
274
275 return 0;
276 }
277
278 /* Tell 4965 where to find the "keep warm" buffer */
279 static int iwl4965_kw_init(struct iwl4965_priv *priv)
280 {
281 unsigned long flags;
282 int rc;
283
284 spin_lock_irqsave(&priv->lock, flags);
285 rc = iwl4965_grab_nic_access(priv);
286 if (rc)
287 goto out;
288
289 iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
290 priv->kw.dma_addr >> 4);
291 iwl4965_release_nic_access(priv);
292 out:
293 spin_unlock_irqrestore(&priv->lock, flags);
294 return rc;
295 }
296
297 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
298 {
299 struct pci_dev *dev = priv->pci_dev;
300 struct iwl4965_kw *kw = &priv->kw;
301
302 kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
303 kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
304 if (!kw->v_addr)
305 return -ENOMEM;
306
307 return 0;
308 }
309
310 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
311 ? # x " " : "")
312
313 /**
314 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
315 *
316 * Does not set up a command, or touch hardware.
317 */
318 int iwl4965_set_fat_chan_info(struct iwl4965_priv *priv, int phymode, u16 channel,
319 const struct iwl4965_eeprom_channel *eeprom_ch,
320 u8 fat_extension_channel)
321 {
322 struct iwl4965_channel_info *ch_info;
323
324 ch_info = (struct iwl4965_channel_info *)
325 iwl4965_get_channel_info(priv, phymode, channel);
326
327 if (!is_channel_valid(ch_info))
328 return -1;
329
330 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
331 " %ddBm): Ad-Hoc %ssupported\n",
332 ch_info->channel,
333 is_channel_a_band(ch_info) ?
334 "5.2" : "2.4",
335 CHECK_AND_PRINT(IBSS),
336 CHECK_AND_PRINT(ACTIVE),
337 CHECK_AND_PRINT(RADAR),
338 CHECK_AND_PRINT(WIDE),
339 CHECK_AND_PRINT(NARROW),
340 CHECK_AND_PRINT(DFS),
341 eeprom_ch->flags,
342 eeprom_ch->max_power_avg,
343 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
344 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
345 "" : "not ");
346
347 ch_info->fat_eeprom = *eeprom_ch;
348 ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
349 ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
350 ch_info->fat_min_power = 0;
351 ch_info->fat_scan_power = eeprom_ch->max_power_avg;
352 ch_info->fat_flags = eeprom_ch->flags;
353 ch_info->fat_extension_channel = fat_extension_channel;
354
355 return 0;
356 }
357
358 /**
359 * iwl4965_kw_free - Free the "keep warm" buffer
360 */
361 static void iwl4965_kw_free(struct iwl4965_priv *priv)
362 {
363 struct pci_dev *dev = priv->pci_dev;
364 struct iwl4965_kw *kw = &priv->kw;
365
366 if (kw->v_addr) {
367 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
368 memset(kw, 0, sizeof(*kw));
369 }
370 }
371
372 /**
373 * iwl4965_txq_ctx_reset - Reset TX queue context
374 * Destroys all DMA structures and initialise them again
375 *
376 * @param priv
377 * @return error code
378 */
379 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
380 {
381 int rc = 0;
382 int txq_id, slots_num;
383 unsigned long flags;
384
385 iwl4965_kw_free(priv);
386
387 /* Free all tx/cmd queues and keep-warm buffer */
388 iwl4965_hw_txq_ctx_free(priv);
389
390 /* Alloc keep-warm buffer */
391 rc = iwl4965_kw_alloc(priv);
392 if (rc) {
393 IWL_ERROR("Keep Warm allocation failed");
394 goto error_kw;
395 }
396
397 spin_lock_irqsave(&priv->lock, flags);
398
399 rc = iwl4965_grab_nic_access(priv);
400 if (unlikely(rc)) {
401 IWL_ERROR("TX reset failed");
402 spin_unlock_irqrestore(&priv->lock, flags);
403 goto error_reset;
404 }
405
406 /* Turn off all Tx DMA channels */
407 iwl4965_write_prph(priv, KDR_SCD_TXFACT, 0);
408 iwl4965_release_nic_access(priv);
409 spin_unlock_irqrestore(&priv->lock, flags);
410
411 /* Tell 4965 where to find the keep-warm buffer */
412 rc = iwl4965_kw_init(priv);
413 if (rc) {
414 IWL_ERROR("kw_init failed\n");
415 goto error_reset;
416 }
417
418 /* Alloc and init all (default 16) Tx queues,
419 * including the command queue (#4) */
420 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
421 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
422 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
423 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
424 txq_id);
425 if (rc) {
426 IWL_ERROR("Tx %d queue init failed\n", txq_id);
427 goto error;
428 }
429 }
430
431 return rc;
432
433 error:
434 iwl4965_hw_txq_ctx_free(priv);
435 error_reset:
436 iwl4965_kw_free(priv);
437 error_kw:
438 return rc;
439 }
440
441 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
442 {
443 int rc;
444 unsigned long flags;
445 struct iwl4965_rx_queue *rxq = &priv->rxq;
446 u8 rev_id;
447 u32 val;
448 u8 val_link;
449
450 iwl4965_power_init_handle(priv);
451
452 /* nic_init */
453 spin_lock_irqsave(&priv->lock, flags);
454
455 iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
456 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
457
458 iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
459 rc = iwl4965_poll_bit(priv, CSR_GP_CNTRL,
460 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
461 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
462 if (rc < 0) {
463 spin_unlock_irqrestore(&priv->lock, flags);
464 IWL_DEBUG_INFO("Failed to init the card\n");
465 return rc;
466 }
467
468 rc = iwl4965_grab_nic_access(priv);
469 if (rc) {
470 spin_unlock_irqrestore(&priv->lock, flags);
471 return rc;
472 }
473
474 iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
475
476 iwl4965_write_prph(priv, APMG_CLK_CTRL_REG,
477 APMG_CLK_VAL_DMA_CLK_RQT |
478 APMG_CLK_VAL_BSM_CLK_RQT);
479 iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
480
481 udelay(20);
482
483 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
484 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
485
486 iwl4965_release_nic_access(priv);
487 iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
488 spin_unlock_irqrestore(&priv->lock, flags);
489
490 /* Determine HW type */
491 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
492 if (rc)
493 return rc;
494
495 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
496
497 iwl4965_nic_set_pwr_src(priv, 1);
498 spin_lock_irqsave(&priv->lock, flags);
499
500 if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
501 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
502 /* Enable No Snoop field */
503 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
504 val & ~(1 << 11));
505 }
506
507 spin_unlock_irqrestore(&priv->lock, flags);
508
509 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
510 IWL_ERROR("Older EEPROM detected! Aborting.\n");
511 return -EINVAL;
512 }
513
514 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
515
516 /* disable L1 entry -- workaround for pre-B1 */
517 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
518
519 spin_lock_irqsave(&priv->lock, flags);
520
521 /* set CSR_HW_CONFIG_REG for uCode use */
522
523 iwl4965_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
524 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
525 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
526
527 rc = iwl4965_grab_nic_access(priv);
528 if (rc < 0) {
529 spin_unlock_irqrestore(&priv->lock, flags);
530 IWL_DEBUG_INFO("Failed to init the card\n");
531 return rc;
532 }
533
534 iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
535 iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
536 APMG_PS_CTRL_VAL_RESET_REQ);
537 udelay(5);
538 iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
539 APMG_PS_CTRL_VAL_RESET_REQ);
540
541 iwl4965_release_nic_access(priv);
542 spin_unlock_irqrestore(&priv->lock, flags);
543
544 iwl4965_hw_card_show_info(priv);
545
546 /* end nic_init */
547
548 /* Allocate the RX queue, or reset if it is already allocated */
549 if (!rxq->bd) {
550 rc = iwl4965_rx_queue_alloc(priv);
551 if (rc) {
552 IWL_ERROR("Unable to initialize Rx queue\n");
553 return -ENOMEM;
554 }
555 } else
556 iwl4965_rx_queue_reset(priv, rxq);
557
558 iwl4965_rx_replenish(priv);
559
560 iwl4965_rx_init(priv, rxq);
561
562 spin_lock_irqsave(&priv->lock, flags);
563
564 rxq->need_update = 1;
565 iwl4965_rx_queue_update_write_ptr(priv, rxq);
566
567 spin_unlock_irqrestore(&priv->lock, flags);
568
569 /* Allocate and init all Tx and Command queues */
570 rc = iwl4965_txq_ctx_reset(priv);
571 if (rc)
572 return rc;
573
574 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
575 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
576
577 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
578 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
579
580 set_bit(STATUS_INIT, &priv->status);
581
582 return 0;
583 }
584
585 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
586 {
587 int rc = 0;
588 u32 reg_val;
589 unsigned long flags;
590
591 spin_lock_irqsave(&priv->lock, flags);
592
593 /* set stop master bit */
594 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
595
596 reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
597
598 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
599 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
600 IWL_DEBUG_INFO("Card in power save, master is already "
601 "stopped\n");
602 else {
603 rc = iwl4965_poll_bit(priv, CSR_RESET,
604 CSR_RESET_REG_FLAG_MASTER_DISABLED,
605 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
606 if (rc < 0) {
607 spin_unlock_irqrestore(&priv->lock, flags);
608 return rc;
609 }
610 }
611
612 spin_unlock_irqrestore(&priv->lock, flags);
613 IWL_DEBUG_INFO("stop master\n");
614
615 return rc;
616 }
617
618 /**
619 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
620 */
621 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
622 {
623
624 int txq_id;
625 unsigned long flags;
626
627 /* Stop each Tx DMA channel, and wait for it to be idle */
628 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
629 spin_lock_irqsave(&priv->lock, flags);
630 if (iwl4965_grab_nic_access(priv)) {
631 spin_unlock_irqrestore(&priv->lock, flags);
632 continue;
633 }
634
635 iwl4965_write_direct32(priv,
636 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
637 0x0);
638 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
639 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
640 (txq_id), 200);
641 iwl4965_release_nic_access(priv);
642 spin_unlock_irqrestore(&priv->lock, flags);
643 }
644
645 /* Deallocate memory for all Tx queues */
646 iwl4965_hw_txq_ctx_free(priv);
647 }
648
649 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
650 {
651 int rc = 0;
652 unsigned long flags;
653
654 iwl4965_hw_nic_stop_master(priv);
655
656 spin_lock_irqsave(&priv->lock, flags);
657
658 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
659
660 udelay(10);
661
662 iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
663 rc = iwl4965_poll_bit(priv, CSR_RESET,
664 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
665 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
666
667 udelay(10);
668
669 rc = iwl4965_grab_nic_access(priv);
670 if (!rc) {
671 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
672 APMG_CLK_VAL_DMA_CLK_RQT |
673 APMG_CLK_VAL_BSM_CLK_RQT);
674
675 udelay(10);
676
677 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
678 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
679
680 iwl4965_release_nic_access(priv);
681 }
682
683 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
684 wake_up_interruptible(&priv->wait_command_queue);
685
686 spin_unlock_irqrestore(&priv->lock, flags);
687
688 return rc;
689
690 }
691
692 #define REG_RECALIB_PERIOD (60)
693
694 /**
695 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
696 *
697 * This callback is provided in order to queue the statistics_work
698 * in work_queue context (v. softirq)
699 *
700 * This timer function is continually reset to execute within
701 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
702 * was received. We need to ensure we receive the statistics in order
703 * to update the temperature used for calibrating the TXPOWER. However,
704 * we can't send the statistics command from softirq context (which
705 * is the context which timers run at) so we have to queue off the
706 * statistics_work to actually send the command to the hardware.
707 */
708 static void iwl4965_bg_statistics_periodic(unsigned long data)
709 {
710 struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
711
712 queue_work(priv->workqueue, &priv->statistics_work);
713 }
714
715 /**
716 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
717 *
718 * This is queued by iwl4965_bg_statistics_periodic.
719 */
720 static void iwl4965_bg_statistics_work(struct work_struct *work)
721 {
722 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
723 statistics_work);
724
725 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
726 return;
727
728 mutex_lock(&priv->mutex);
729 iwl4965_send_statistics_request(priv);
730 mutex_unlock(&priv->mutex);
731 }
732
733 #define CT_LIMIT_CONST 259
734 #define TM_CT_KILL_THRESHOLD 110
735
736 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
737 {
738 struct iwl4965_ct_kill_config cmd;
739 u32 R1, R2, R3;
740 u32 temp_th;
741 u32 crit_temperature;
742 unsigned long flags;
743 int rc = 0;
744
745 spin_lock_irqsave(&priv->lock, flags);
746 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
747 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
748 spin_unlock_irqrestore(&priv->lock, flags);
749
750 if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
751 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
752 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
753 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
754 } else {
755 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
756 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
757 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
758 }
759
760 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
761
762 crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
763 cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
764 rc = iwl4965_send_cmd_pdu(priv,
765 REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
766 if (rc)
767 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
768 else
769 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
770 }
771
772 #ifdef CONFIG_IWL4965_SENSITIVITY
773
774 /* "false alarms" are signals that our DSP tries to lock onto,
775 * but then determines that they are either noise, or transmissions
776 * from a distant wireless network (also "noise", really) that get
777 * "stepped on" by stronger transmissions within our own network.
778 * This algorithm attempts to set a sensitivity level that is high
779 * enough to receive all of our own network traffic, but not so
780 * high that our DSP gets too busy trying to lock onto non-network
781 * activity/noise. */
782 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
783 u32 norm_fa,
784 u32 rx_enable_time,
785 struct statistics_general_data *rx_info)
786 {
787 u32 max_nrg_cck = 0;
788 int i = 0;
789 u8 max_silence_rssi = 0;
790 u32 silence_ref = 0;
791 u8 silence_rssi_a = 0;
792 u8 silence_rssi_b = 0;
793 u8 silence_rssi_c = 0;
794 u32 val;
795
796 /* "false_alarms" values below are cross-multiplications to assess the
797 * numbers of false alarms within the measured period of actual Rx
798 * (Rx is off when we're txing), vs the min/max expected false alarms
799 * (some should be expected if rx is sensitive enough) in a
800 * hypothetical listening period of 200 time units (TU), 204.8 msec:
801 *
802 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
803 *
804 * */
805 u32 false_alarms = norm_fa * 200 * 1024;
806 u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
807 u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
808 struct iwl4965_sensitivity_data *data = NULL;
809
810 data = &(priv->sensitivity_data);
811
812 data->nrg_auto_corr_silence_diff = 0;
813
814 /* Find max silence rssi among all 3 receivers.
815 * This is background noise, which may include transmissions from other
816 * networks, measured during silence before our network's beacon */
817 silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
818 ALL_BAND_FILTER) >> 8);
819 silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
820 ALL_BAND_FILTER) >> 8);
821 silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
822 ALL_BAND_FILTER) >> 8);
823
824 val = max(silence_rssi_b, silence_rssi_c);
825 max_silence_rssi = max(silence_rssi_a, (u8) val);
826
827 /* Store silence rssi in 20-beacon history table */
828 data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
829 data->nrg_silence_idx++;
830 if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
831 data->nrg_silence_idx = 0;
832
833 /* Find max silence rssi across 20 beacon history */
834 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
835 val = data->nrg_silence_rssi[i];
836 silence_ref = max(silence_ref, val);
837 }
838 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
839 silence_rssi_a, silence_rssi_b, silence_rssi_c,
840 silence_ref);
841
842 /* Find max rx energy (min value!) among all 3 receivers,
843 * measured during beacon frame.
844 * Save it in 10-beacon history table. */
845 i = data->nrg_energy_idx;
846 val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
847 data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
848
849 data->nrg_energy_idx++;
850 if (data->nrg_energy_idx >= 10)
851 data->nrg_energy_idx = 0;
852
853 /* Find min rx energy (max value) across 10 beacon history.
854 * This is the minimum signal level that we want to receive well.
855 * Add backoff (margin so we don't miss slightly lower energy frames).
856 * This establishes an upper bound (min value) for energy threshold. */
857 max_nrg_cck = data->nrg_value[0];
858 for (i = 1; i < 10; i++)
859 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
860 max_nrg_cck += 6;
861
862 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
863 rx_info->beacon_energy_a, rx_info->beacon_energy_b,
864 rx_info->beacon_energy_c, max_nrg_cck - 6);
865
866 /* Count number of consecutive beacons with fewer-than-desired
867 * false alarms. */
868 if (false_alarms < min_false_alarms)
869 data->num_in_cck_no_fa++;
870 else
871 data->num_in_cck_no_fa = 0;
872 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
873 data->num_in_cck_no_fa);
874
875 /* If we got too many false alarms this time, reduce sensitivity */
876 if (false_alarms > max_false_alarms) {
877 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
878 false_alarms, max_false_alarms);
879 IWL_DEBUG_CALIB("... reducing sensitivity\n");
880 data->nrg_curr_state = IWL_FA_TOO_MANY;
881
882 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
883 /* Store for "fewer than desired" on later beacon */
884 data->nrg_silence_ref = silence_ref;
885
886 /* increase energy threshold (reduce nrg value)
887 * to decrease sensitivity */
888 if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
889 data->nrg_th_cck = data->nrg_th_cck
890 - NRG_STEP_CCK;
891 }
892
893 /* increase auto_corr values to decrease sensitivity */
894 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
895 data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
896 else {
897 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
898 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
899 }
900 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
901 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
902
903 /* Else if we got fewer than desired, increase sensitivity */
904 } else if (false_alarms < min_false_alarms) {
905 data->nrg_curr_state = IWL_FA_TOO_FEW;
906
907 /* Compare silence level with silence level for most recent
908 * healthy number or too many false alarms */
909 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
910 (s32)silence_ref;
911
912 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
913 false_alarms, min_false_alarms,
914 data->nrg_auto_corr_silence_diff);
915
916 /* Increase value to increase sensitivity, but only if:
917 * 1a) previous beacon did *not* have *too many* false alarms
918 * 1b) AND there's a significant difference in Rx levels
919 * from a previous beacon with too many, or healthy # FAs
920 * OR 2) We've seen a lot of beacons (100) with too few
921 * false alarms */
922 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
923 ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
924 (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
925
926 IWL_DEBUG_CALIB("... increasing sensitivity\n");
927 /* Increase nrg value to increase sensitivity */
928 val = data->nrg_th_cck + NRG_STEP_CCK;
929 data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
930
931 /* Decrease auto_corr values to increase sensitivity */
932 val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
933 data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
934
935 val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
936 data->auto_corr_cck_mrc =
937 max((u32)AUTO_CORR_MIN_CCK_MRC, val);
938
939 } else
940 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
941
942 /* Else we got a healthy number of false alarms, keep status quo */
943 } else {
944 IWL_DEBUG_CALIB(" FA in safe zone\n");
945 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
946
947 /* Store for use in "fewer than desired" with later beacon */
948 data->nrg_silence_ref = silence_ref;
949
950 /* If previous beacon had too many false alarms,
951 * give it some extra margin by reducing sensitivity again
952 * (but don't go below measured energy of desired Rx) */
953 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
954 IWL_DEBUG_CALIB("... increasing margin\n");
955 data->nrg_th_cck -= NRG_MARGIN;
956 }
957 }
958
959 /* Make sure the energy threshold does not go above the measured
960 * energy of the desired Rx signals (reduced by backoff margin),
961 * or else we might start missing Rx frames.
962 * Lower value is higher energy, so we use max()!
963 */
964 data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
965 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
966
967 data->nrg_prev_state = data->nrg_curr_state;
968
969 return 0;
970 }
971
972
973 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
974 u32 norm_fa,
975 u32 rx_enable_time)
976 {
977 u32 val;
978 u32 false_alarms = norm_fa * 200 * 1024;
979 u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
980 u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
981 struct iwl4965_sensitivity_data *data = NULL;
982
983 data = &(priv->sensitivity_data);
984
985 /* If we got too many false alarms this time, reduce sensitivity */
986 if (false_alarms > max_false_alarms) {
987
988 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
989 false_alarms, max_false_alarms);
990
991 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
992 data->auto_corr_ofdm =
993 min((u32)AUTO_CORR_MAX_OFDM, val);
994
995 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
996 data->auto_corr_ofdm_mrc =
997 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
998
999 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1000 data->auto_corr_ofdm_x1 =
1001 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1002
1003 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1004 data->auto_corr_ofdm_mrc_x1 =
1005 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1006 }
1007
1008 /* Else if we got fewer than desired, increase sensitivity */
1009 else if (false_alarms < min_false_alarms) {
1010
1011 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1012 false_alarms, min_false_alarms);
1013
1014 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1015 data->auto_corr_ofdm =
1016 max((u32)AUTO_CORR_MIN_OFDM, val);
1017
1018 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1019 data->auto_corr_ofdm_mrc =
1020 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1021
1022 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1023 data->auto_corr_ofdm_x1 =
1024 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1025
1026 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1027 data->auto_corr_ofdm_mrc_x1 =
1028 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1029 }
1030
1031 else
1032 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1033 min_false_alarms, false_alarms, max_false_alarms);
1034
1035 return 0;
1036 }
1037
1038 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1039 struct iwl4965_cmd *cmd, struct sk_buff *skb)
1040 {
1041 /* We didn't cache the SKB; let the caller free it */
1042 return 1;
1043 }
1044
1045 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1046 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1047 {
1048 int rc = 0;
1049 struct iwl4965_sensitivity_cmd cmd ;
1050 struct iwl4965_sensitivity_data *data = NULL;
1051 struct iwl4965_host_cmd cmd_out = {
1052 .id = SENSITIVITY_CMD,
1053 .len = sizeof(struct iwl4965_sensitivity_cmd),
1054 .meta.flags = flags,
1055 .data = &cmd,
1056 };
1057
1058 data = &(priv->sensitivity_data);
1059
1060 memset(&cmd, 0, sizeof(cmd));
1061
1062 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1063 cpu_to_le16((u16)data->auto_corr_ofdm);
1064 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1065 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1066 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1067 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1068 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1069 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1070
1071 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1072 cpu_to_le16((u16)data->auto_corr_cck);
1073 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1074 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1075
1076 cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1077 cpu_to_le16((u16)data->nrg_th_cck);
1078 cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1079 cpu_to_le16((u16)data->nrg_th_ofdm);
1080
1081 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1082 __constant_cpu_to_le16(190);
1083 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1084 __constant_cpu_to_le16(390);
1085 cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1086 __constant_cpu_to_le16(62);
1087
1088 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1089 data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1090 data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1091 data->nrg_th_ofdm);
1092
1093 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1094 data->auto_corr_cck, data->auto_corr_cck_mrc,
1095 data->nrg_th_cck);
1096
1097 /* Update uCode's "work" table, and copy it to DSP */
1098 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1099
1100 if (flags & CMD_ASYNC)
1101 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1102
1103 /* Don't send command to uCode if nothing has changed */
1104 if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1105 sizeof(u16)*HD_TABLE_SIZE)) {
1106 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1107 return 0;
1108 }
1109
1110 /* Copy table for comparison next time */
1111 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1112 sizeof(u16)*HD_TABLE_SIZE);
1113
1114 rc = iwl4965_send_cmd(priv, &cmd_out);
1115 if (!rc) {
1116 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1117 return rc;
1118 }
1119
1120 return 0;
1121 }
1122
1123 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1124 {
1125 int rc = 0;
1126 int i;
1127 struct iwl4965_sensitivity_data *data = NULL;
1128
1129 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1130
1131 if (force)
1132 memset(&(priv->sensitivity_tbl[0]), 0,
1133 sizeof(u16)*HD_TABLE_SIZE);
1134
1135 /* Clear driver's sensitivity algo data */
1136 data = &(priv->sensitivity_data);
1137 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1138
1139 data->num_in_cck_no_fa = 0;
1140 data->nrg_curr_state = IWL_FA_TOO_MANY;
1141 data->nrg_prev_state = IWL_FA_TOO_MANY;
1142 data->nrg_silence_ref = 0;
1143 data->nrg_silence_idx = 0;
1144 data->nrg_energy_idx = 0;
1145
1146 for (i = 0; i < 10; i++)
1147 data->nrg_value[i] = 0;
1148
1149 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1150 data->nrg_silence_rssi[i] = 0;
1151
1152 data->auto_corr_ofdm = 90;
1153 data->auto_corr_ofdm_mrc = 170;
1154 data->auto_corr_ofdm_x1 = 105;
1155 data->auto_corr_ofdm_mrc_x1 = 220;
1156 data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1157 data->auto_corr_cck_mrc = 200;
1158 data->nrg_th_cck = 100;
1159 data->nrg_th_ofdm = 100;
1160
1161 data->last_bad_plcp_cnt_ofdm = 0;
1162 data->last_fa_cnt_ofdm = 0;
1163 data->last_bad_plcp_cnt_cck = 0;
1164 data->last_fa_cnt_cck = 0;
1165
1166 /* Clear prior Sensitivity command data to force send to uCode */
1167 if (force)
1168 memset(&(priv->sensitivity_tbl[0]), 0,
1169 sizeof(u16)*HD_TABLE_SIZE);
1170
1171 rc |= iwl4965_sensitivity_write(priv, flags);
1172 IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1173
1174 return;
1175 }
1176
1177
1178 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1179 * Called after every association, but this runs only once!
1180 * ... once chain noise is calibrated the first time, it's good forever. */
1181 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1182 {
1183 struct iwl4965_chain_noise_data *data = NULL;
1184 int rc = 0;
1185
1186 data = &(priv->chain_noise_data);
1187 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1188 struct iwl4965_calibration_cmd cmd;
1189
1190 memset(&cmd, 0, sizeof(cmd));
1191 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1192 cmd.diff_gain_a = 0;
1193 cmd.diff_gain_b = 0;
1194 cmd.diff_gain_c = 0;
1195 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1196 sizeof(cmd), &cmd);
1197 msleep(4);
1198 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1199 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1200 }
1201 return;
1202 }
1203
1204 /*
1205 * Accumulate 20 beacons of signal and noise statistics for each of
1206 * 3 receivers/antennas/rx-chains, then figure out:
1207 * 1) Which antennas are connected.
1208 * 2) Differential rx gain settings to balance the 3 receivers.
1209 */
1210 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1211 struct iwl4965_notif_statistics *stat_resp)
1212 {
1213 struct iwl4965_chain_noise_data *data = NULL;
1214 int rc = 0;
1215
1216 u32 chain_noise_a;
1217 u32 chain_noise_b;
1218 u32 chain_noise_c;
1219 u32 chain_sig_a;
1220 u32 chain_sig_b;
1221 u32 chain_sig_c;
1222 u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1223 u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1224 u32 max_average_sig;
1225 u16 max_average_sig_antenna_i;
1226 u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1227 u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1228 u16 i = 0;
1229 u16 chan_num = INITIALIZATION_VALUE;
1230 u32 band = INITIALIZATION_VALUE;
1231 u32 active_chains = 0;
1232 unsigned long flags;
1233 struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1234
1235 data = &(priv->chain_noise_data);
1236
1237 /* Accumulate just the first 20 beacons after the first association,
1238 * then we're done forever. */
1239 if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1240 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1241 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1242 return;
1243 }
1244
1245 spin_lock_irqsave(&priv->lock, flags);
1246 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1247 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1248 spin_unlock_irqrestore(&priv->lock, flags);
1249 return;
1250 }
1251
1252 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1253 chan_num = le16_to_cpu(priv->staging_rxon.channel);
1254
1255 /* Make sure we accumulate data for just the associated channel
1256 * (even if scanning). */
1257 if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1258 ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1259 (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1260 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1261 chan_num, band);
1262 spin_unlock_irqrestore(&priv->lock, flags);
1263 return;
1264 }
1265
1266 /* Accumulate beacon statistics values across 20 beacons */
1267 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1268 IN_BAND_FILTER;
1269 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1270 IN_BAND_FILTER;
1271 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1272 IN_BAND_FILTER;
1273
1274 chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1275 chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1276 chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1277
1278 spin_unlock_irqrestore(&priv->lock, flags);
1279
1280 data->beacon_count++;
1281
1282 data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1283 data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1284 data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1285
1286 data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1287 data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1288 data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1289
1290 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1291 data->beacon_count);
1292 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1293 chain_sig_a, chain_sig_b, chain_sig_c);
1294 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1295 chain_noise_a, chain_noise_b, chain_noise_c);
1296
1297 /* If this is the 20th beacon, determine:
1298 * 1) Disconnected antennas (using signal strengths)
1299 * 2) Differential gain (using silence noise) to balance receivers */
1300 if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1301
1302 /* Analyze signal for disconnected antenna */
1303 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1304 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1305 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1306
1307 if (average_sig[0] >= average_sig[1]) {
1308 max_average_sig = average_sig[0];
1309 max_average_sig_antenna_i = 0;
1310 active_chains = (1 << max_average_sig_antenna_i);
1311 } else {
1312 max_average_sig = average_sig[1];
1313 max_average_sig_antenna_i = 1;
1314 active_chains = (1 << max_average_sig_antenna_i);
1315 }
1316
1317 if (average_sig[2] >= max_average_sig) {
1318 max_average_sig = average_sig[2];
1319 max_average_sig_antenna_i = 2;
1320 active_chains = (1 << max_average_sig_antenna_i);
1321 }
1322
1323 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1324 average_sig[0], average_sig[1], average_sig[2]);
1325 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1326 max_average_sig, max_average_sig_antenna_i);
1327
1328 /* Compare signal strengths for all 3 receivers. */
1329 for (i = 0; i < NUM_RX_CHAINS; i++) {
1330 if (i != max_average_sig_antenna_i) {
1331 s32 rssi_delta = (max_average_sig -
1332 average_sig[i]);
1333
1334 /* If signal is very weak, compared with
1335 * strongest, mark it as disconnected. */
1336 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1337 data->disconn_array[i] = 1;
1338 else
1339 active_chains |= (1 << i);
1340 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1341 "disconn_array[i] = %d\n",
1342 i, rssi_delta, data->disconn_array[i]);
1343 }
1344 }
1345
1346 /*If both chains A & B are disconnected -
1347 * connect B and leave A as is */
1348 if (data->disconn_array[CHAIN_A] &&
1349 data->disconn_array[CHAIN_B]) {
1350 data->disconn_array[CHAIN_B] = 0;
1351 active_chains |= (1 << CHAIN_B);
1352 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1353 "W/A - declare B as connected\n");
1354 }
1355
1356 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1357 active_chains);
1358
1359 /* Save for use within RXON, TX, SCAN commands, etc. */
1360 priv->valid_antenna = active_chains;
1361
1362 /* Analyze noise for rx balance */
1363 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1364 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1365 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1366
1367 for (i = 0; i < NUM_RX_CHAINS; i++) {
1368 if (!(data->disconn_array[i]) &&
1369 (average_noise[i] <= min_average_noise)) {
1370 /* This means that chain i is active and has
1371 * lower noise values so far: */
1372 min_average_noise = average_noise[i];
1373 min_average_noise_antenna_i = i;
1374 }
1375 }
1376
1377 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1378
1379 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1380 average_noise[0], average_noise[1],
1381 average_noise[2]);
1382
1383 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1384 min_average_noise, min_average_noise_antenna_i);
1385
1386 for (i = 0; i < NUM_RX_CHAINS; i++) {
1387 s32 delta_g = 0;
1388
1389 if (!(data->disconn_array[i]) &&
1390 (data->delta_gain_code[i] ==
1391 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1392 delta_g = average_noise[i] - min_average_noise;
1393 data->delta_gain_code[i] = (u8)((delta_g *
1394 10) / 15);
1395 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1396 data->delta_gain_code[i])
1397 data->delta_gain_code[i] =
1398 CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1399
1400 data->delta_gain_code[i] =
1401 (data->delta_gain_code[i] | (1 << 2));
1402 } else
1403 data->delta_gain_code[i] = 0;
1404 }
1405 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1406 data->delta_gain_code[0],
1407 data->delta_gain_code[1],
1408 data->delta_gain_code[2]);
1409
1410 /* Differential gain gets sent to uCode only once */
1411 if (!data->radio_write) {
1412 struct iwl4965_calibration_cmd cmd;
1413 data->radio_write = 1;
1414
1415 memset(&cmd, 0, sizeof(cmd));
1416 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1417 cmd.diff_gain_a = data->delta_gain_code[0];
1418 cmd.diff_gain_b = data->delta_gain_code[1];
1419 cmd.diff_gain_c = data->delta_gain_code[2];
1420 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1421 sizeof(cmd), &cmd);
1422 if (rc)
1423 IWL_DEBUG_CALIB("fail sending cmd "
1424 "REPLY_PHY_CALIBRATION_CMD \n");
1425
1426 /* TODO we might want recalculate
1427 * rx_chain in rxon cmd */
1428
1429 /* Mark so we run this algo only once! */
1430 data->state = IWL_CHAIN_NOISE_CALIBRATED;
1431 }
1432 data->chain_noise_a = 0;
1433 data->chain_noise_b = 0;
1434 data->chain_noise_c = 0;
1435 data->chain_signal_a = 0;
1436 data->chain_signal_b = 0;
1437 data->chain_signal_c = 0;
1438 data->beacon_count = 0;
1439 }
1440 return;
1441 }
1442
1443 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1444 struct iwl4965_notif_statistics *resp)
1445 {
1446 int rc = 0;
1447 u32 rx_enable_time;
1448 u32 fa_cck;
1449 u32 fa_ofdm;
1450 u32 bad_plcp_cck;
1451 u32 bad_plcp_ofdm;
1452 u32 norm_fa_ofdm;
1453 u32 norm_fa_cck;
1454 struct iwl4965_sensitivity_data *data = NULL;
1455 struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1456 struct statistics_rx *statistics = &(resp->rx);
1457 unsigned long flags;
1458 struct statistics_general_data statis;
1459
1460 data = &(priv->sensitivity_data);
1461
1462 if (!iwl4965_is_associated(priv)) {
1463 IWL_DEBUG_CALIB("<< - not associated\n");
1464 return;
1465 }
1466
1467 spin_lock_irqsave(&priv->lock, flags);
1468 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1469 IWL_DEBUG_CALIB("<< invalid data.\n");
1470 spin_unlock_irqrestore(&priv->lock, flags);
1471 return;
1472 }
1473
1474 /* Extract Statistics: */
1475 rx_enable_time = le32_to_cpu(rx_info->channel_load);
1476 fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1477 fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1478 bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1479 bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1480
1481 statis.beacon_silence_rssi_a =
1482 le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1483 statis.beacon_silence_rssi_b =
1484 le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1485 statis.beacon_silence_rssi_c =
1486 le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1487 statis.beacon_energy_a =
1488 le32_to_cpu(statistics->general.beacon_energy_a);
1489 statis.beacon_energy_b =
1490 le32_to_cpu(statistics->general.beacon_energy_b);
1491 statis.beacon_energy_c =
1492 le32_to_cpu(statistics->general.beacon_energy_c);
1493
1494 spin_unlock_irqrestore(&priv->lock, flags);
1495
1496 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1497
1498 if (!rx_enable_time) {
1499 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1500 return;
1501 }
1502
1503 /* These statistics increase monotonically, and do not reset
1504 * at each beacon. Calculate difference from last value, or just
1505 * use the new statistics value if it has reset or wrapped around. */
1506 if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1507 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1508 else {
1509 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1510 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1511 }
1512
1513 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1514 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1515 else {
1516 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1517 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1518 }
1519
1520 if (data->last_fa_cnt_ofdm > fa_ofdm)
1521 data->last_fa_cnt_ofdm = fa_ofdm;
1522 else {
1523 fa_ofdm -= data->last_fa_cnt_ofdm;
1524 data->last_fa_cnt_ofdm += fa_ofdm;
1525 }
1526
1527 if (data->last_fa_cnt_cck > fa_cck)
1528 data->last_fa_cnt_cck = fa_cck;
1529 else {
1530 fa_cck -= data->last_fa_cnt_cck;
1531 data->last_fa_cnt_cck += fa_cck;
1532 }
1533
1534 /* Total aborted signal locks */
1535 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1536 norm_fa_cck = fa_cck + bad_plcp_cck;
1537
1538 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
1539 bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1540
1541 iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1542 iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1543 rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1544
1545 return;
1546 }
1547
1548 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1549 {
1550 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1551 sensitivity_work);
1552
1553 mutex_lock(&priv->mutex);
1554
1555 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1556 test_bit(STATUS_SCANNING, &priv->status)) {
1557 mutex_unlock(&priv->mutex);
1558 return;
1559 }
1560
1561 if (priv->start_calib) {
1562 iwl4965_noise_calibration(priv, &priv->statistics);
1563
1564 if (priv->sensitivity_data.state ==
1565 IWL_SENS_CALIB_NEED_REINIT) {
1566 iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1567 priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1568 } else
1569 iwl4965_sensitivity_calibration(priv,
1570 &priv->statistics);
1571 }
1572
1573 mutex_unlock(&priv->mutex);
1574 return;
1575 }
1576 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1577
1578 static void iwl4965_bg_txpower_work(struct work_struct *work)
1579 {
1580 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1581 txpower_work);
1582
1583 /* If a scan happened to start before we got here
1584 * then just return; the statistics notification will
1585 * kick off another scheduled work to compensate for
1586 * any temperature delta we missed here. */
1587 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1588 test_bit(STATUS_SCANNING, &priv->status))
1589 return;
1590
1591 mutex_lock(&priv->mutex);
1592
1593 /* Regardless of if we are assocaited, we must reconfigure the
1594 * TX power since frames can be sent on non-radar channels while
1595 * not associated */
1596 iwl4965_hw_reg_send_txpower(priv);
1597
1598 /* Update last_temperature to keep is_calib_needed from running
1599 * when it isn't needed... */
1600 priv->last_temperature = priv->temperature;
1601
1602 mutex_unlock(&priv->mutex);
1603 }
1604
1605 /*
1606 * Acquire priv->lock before calling this function !
1607 */
1608 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1609 {
1610 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1611 (index & 0xff) | (txq_id << 8));
1612 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1613 }
1614
1615 /**
1616 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1617 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1618 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1619 *
1620 * NOTE: Acquire priv->lock before calling this function !
1621 */
1622 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1623 struct iwl4965_tx_queue *txq,
1624 int tx_fifo_id, int scd_retry)
1625 {
1626 int txq_id = txq->q.id;
1627
1628 /* Find out whether to activate Tx queue */
1629 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1630
1631 /* Set up and activate */
1632 iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1633 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1634 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1635 (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1636 (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1637 SCD_QUEUE_STTS_REG_MSK);
1638
1639 txq->sched_retry = scd_retry;
1640
1641 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1642 active ? "Activate" : "Deactivate",
1643 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1644 }
1645
1646 static const u16 default_queue_to_tx_fifo[] = {
1647 IWL_TX_FIFO_AC3,
1648 IWL_TX_FIFO_AC2,
1649 IWL_TX_FIFO_AC1,
1650 IWL_TX_FIFO_AC0,
1651 IWL_CMD_FIFO_NUM,
1652 IWL_TX_FIFO_HCCA_1,
1653 IWL_TX_FIFO_HCCA_2
1654 };
1655
1656 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1657 {
1658 set_bit(txq_id, &priv->txq_ctx_active_msk);
1659 }
1660
1661 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1662 {
1663 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1664 }
1665
1666 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1667 {
1668 u32 a;
1669 int i = 0;
1670 unsigned long flags;
1671 int rc;
1672
1673 spin_lock_irqsave(&priv->lock, flags);
1674
1675 #ifdef CONFIG_IWL4965_SENSITIVITY
1676 memset(&(priv->sensitivity_data), 0,
1677 sizeof(struct iwl4965_sensitivity_data));
1678 memset(&(priv->chain_noise_data), 0,
1679 sizeof(struct iwl4965_chain_noise_data));
1680 for (i = 0; i < NUM_RX_CHAINS; i++)
1681 priv->chain_noise_data.delta_gain_code[i] =
1682 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1683 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1684 rc = iwl4965_grab_nic_access(priv);
1685 if (rc) {
1686 spin_unlock_irqrestore(&priv->lock, flags);
1687 return rc;
1688 }
1689
1690 /* Clear 4965's internal Tx Scheduler data base */
1691 priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1692 a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1693 for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1694 iwl4965_write_targ_mem(priv, a, 0);
1695 for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1696 iwl4965_write_targ_mem(priv, a, 0);
1697 for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1698 iwl4965_write_targ_mem(priv, a, 0);
1699
1700 /* Tel 4965 where to find Tx byte count tables */
1701 iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1702 (priv->hw_setting.shared_phys +
1703 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1704
1705 /* Disable chain mode for all queues */
1706 iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1707
1708 /* Initialize each Tx queue (including the command queue) */
1709 for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1710
1711 /* TFD circular buffer read/write indexes */
1712 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1713 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1714
1715 /* Max Tx Window size for Scheduler-ACK mode */
1716 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1717 SCD_CONTEXT_QUEUE_OFFSET(i),
1718 (SCD_WIN_SIZE <<
1719 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1720 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1721
1722 /* Frame limit */
1723 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1724 SCD_CONTEXT_QUEUE_OFFSET(i) +
1725 sizeof(u32),
1726 (SCD_FRAME_LIMIT <<
1727 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1728 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1729
1730 }
1731 iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1732 (1 << priv->hw_setting.max_txq_num) - 1);
1733
1734 /* Activate all Tx DMA/FIFO channels */
1735 iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1736 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1737
1738 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1739
1740 /* Map each Tx/cmd queue to its corresponding fifo */
1741 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1742 int ac = default_queue_to_tx_fifo[i];
1743 iwl4965_txq_ctx_activate(priv, i);
1744 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1745 }
1746
1747 iwl4965_release_nic_access(priv);
1748 spin_unlock_irqrestore(&priv->lock, flags);
1749
1750 return 0;
1751 }
1752
1753 /**
1754 * iwl4965_hw_set_hw_setting
1755 *
1756 * Called when initializing driver
1757 */
1758 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1759 {
1760 /* Allocate area for Tx byte count tables and Rx queue status */
1761 priv->hw_setting.shared_virt =
1762 pci_alloc_consistent(priv->pci_dev,
1763 sizeof(struct iwl4965_shared),
1764 &priv->hw_setting.shared_phys);
1765
1766 if (!priv->hw_setting.shared_virt)
1767 return -1;
1768
1769 memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1770
1771 priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1772 priv->hw_setting.ac_queue_count = AC_NUM;
1773 priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1774 priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1775 priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1776 if (iwl4965_param_amsdu_size_8K)
1777 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1778 else
1779 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1780 priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1781 priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1782 priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1783 return 0;
1784 }
1785
1786 /**
1787 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1788 *
1789 * Destroy all TX DMA queues and structures
1790 */
1791 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1792 {
1793 int txq_id;
1794
1795 /* Tx queues */
1796 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1797 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1798
1799 /* Keep-warm buffer */
1800 iwl4965_kw_free(priv);
1801 }
1802
1803 /**
1804 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1805 *
1806 * Does NOT advance any TFD circular buffer read/write indexes
1807 * Does NOT free the TFD itself (which is within circular buffer)
1808 */
1809 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1810 {
1811 struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1812 struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1813 struct pci_dev *dev = priv->pci_dev;
1814 int i;
1815 int counter = 0;
1816 int index, is_odd;
1817
1818 /* Host command buffers stay mapped in memory, nothing to clean */
1819 if (txq->q.id == IWL_CMD_QUEUE_NUM)
1820 return 0;
1821
1822 /* Sanity check on number of chunks */
1823 counter = IWL_GET_BITS(*bd, num_tbs);
1824 if (counter > MAX_NUM_OF_TBS) {
1825 IWL_ERROR("Too many chunks: %i\n", counter);
1826 /* @todo issue fatal error, it is quite serious situation */
1827 return 0;
1828 }
1829
1830 /* Unmap chunks, if any.
1831 * TFD info for odd chunks is different format than for even chunks. */
1832 for (i = 0; i < counter; i++) {
1833 index = i / 2;
1834 is_odd = i & 0x1;
1835
1836 if (is_odd)
1837 pci_unmap_single(
1838 dev,
1839 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1840 (IWL_GET_BITS(bd->pa[index],
1841 tb2_addr_hi20) << 16),
1842 IWL_GET_BITS(bd->pa[index], tb2_len),
1843 PCI_DMA_TODEVICE);
1844
1845 else if (i > 0)
1846 pci_unmap_single(dev,
1847 le32_to_cpu(bd->pa[index].tb1_addr),
1848 IWL_GET_BITS(bd->pa[index], tb1_len),
1849 PCI_DMA_TODEVICE);
1850
1851 /* Free SKB, if any, for this chunk */
1852 if (txq->txb[txq->q.read_ptr].skb[i]) {
1853 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1854
1855 dev_kfree_skb(skb);
1856 txq->txb[txq->q.read_ptr].skb[i] = NULL;
1857 }
1858 }
1859 return 0;
1860 }
1861
1862 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1863 {
1864 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1865 return -EINVAL;
1866 }
1867
1868 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1869 {
1870 s32 sign = 1;
1871
1872 if (num < 0) {
1873 sign = -sign;
1874 num = -num;
1875 }
1876 if (denom < 0) {
1877 sign = -sign;
1878 denom = -denom;
1879 }
1880 *res = 1;
1881 *res = ((num * 2 + denom) / (denom * 2)) * sign;
1882
1883 return 1;
1884 }
1885
1886 /**
1887 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1888 *
1889 * Determines power supply voltage compensation for txpower calculations.
1890 * Returns number of 1/2-dB steps to subtract from gain table index,
1891 * to compensate for difference between power supply voltage during
1892 * factory measurements, vs. current power supply voltage.
1893 *
1894 * Voltage indication is higher for lower voltage.
1895 * Lower voltage requires more gain (lower gain table index).
1896 */
1897 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1898 s32 current_voltage)
1899 {
1900 s32 comp = 0;
1901
1902 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1903 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1904 return 0;
1905
1906 iwl4965_math_div_round(current_voltage - eeprom_voltage,
1907 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1908
1909 if (current_voltage > eeprom_voltage)
1910 comp *= 2;
1911 if ((comp < -2) || (comp > 2))
1912 comp = 0;
1913
1914 return comp;
1915 }
1916
1917 static const struct iwl4965_channel_info *
1918 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv, u8 phymode, u16 channel)
1919 {
1920 const struct iwl4965_channel_info *ch_info;
1921
1922 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
1923
1924 if (!is_channel_valid(ch_info))
1925 return NULL;
1926
1927 return ch_info;
1928 }
1929
1930 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1931 {
1932 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1933 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1934 return CALIB_CH_GROUP_5;
1935
1936 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1937 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1938 return CALIB_CH_GROUP_1;
1939
1940 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1941 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1942 return CALIB_CH_GROUP_2;
1943
1944 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1945 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1946 return CALIB_CH_GROUP_3;
1947
1948 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1949 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1950 return CALIB_CH_GROUP_4;
1951
1952 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1953 return -1;
1954 }
1955
1956 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1957 {
1958 s32 b = -1;
1959
1960 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1961 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1962 continue;
1963
1964 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1965 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1966 break;
1967 }
1968
1969 return b;
1970 }
1971
1972 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1973 {
1974 s32 val;
1975
1976 if (x2 == x1)
1977 return y1;
1978 else {
1979 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1980 return val + y2;
1981 }
1982 }
1983
1984 /**
1985 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1986 *
1987 * Interpolates factory measurements from the two sample channels within a
1988 * sub-band, to apply to channel of interest. Interpolation is proportional to
1989 * differences in channel frequencies, which is proportional to differences
1990 * in channel number.
1991 */
1992 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
1993 struct iwl4965_eeprom_calib_ch_info *chan_info)
1994 {
1995 s32 s = -1;
1996 u32 c;
1997 u32 m;
1998 const struct iwl4965_eeprom_calib_measure *m1;
1999 const struct iwl4965_eeprom_calib_measure *m2;
2000 struct iwl4965_eeprom_calib_measure *omeas;
2001 u32 ch_i1;
2002 u32 ch_i2;
2003
2004 s = iwl4965_get_sub_band(priv, channel);
2005 if (s >= EEPROM_TX_POWER_BANDS) {
2006 IWL_ERROR("Tx Power can not find channel %d ", channel);
2007 return -1;
2008 }
2009
2010 ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2011 ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2012 chan_info->ch_num = (u8) channel;
2013
2014 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2015 channel, s, ch_i1, ch_i2);
2016
2017 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2018 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2019 m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2020 measurements[c][m]);
2021 m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2022 measurements[c][m]);
2023 omeas = &(chan_info->measurements[c][m]);
2024
2025 omeas->actual_pow =
2026 (u8) iwl4965_interpolate_value(channel, ch_i1,
2027 m1->actual_pow,
2028 ch_i2,
2029 m2->actual_pow);
2030 omeas->gain_idx =
2031 (u8) iwl4965_interpolate_value(channel, ch_i1,
2032 m1->gain_idx, ch_i2,
2033 m2->gain_idx);
2034 omeas->temperature =
2035 (u8) iwl4965_interpolate_value(channel, ch_i1,
2036 m1->temperature,
2037 ch_i2,
2038 m2->temperature);
2039 omeas->pa_det =
2040 (s8) iwl4965_interpolate_value(channel, ch_i1,
2041 m1->pa_det, ch_i2,
2042 m2->pa_det);
2043
2044 IWL_DEBUG_TXPOWER
2045 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2046 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2047 IWL_DEBUG_TXPOWER
2048 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2049 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2050 IWL_DEBUG_TXPOWER
2051 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2052 m1->pa_det, m2->pa_det, omeas->pa_det);
2053 IWL_DEBUG_TXPOWER
2054 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2055 m1->temperature, m2->temperature,
2056 omeas->temperature);
2057 }
2058 }
2059
2060 return 0;
2061 }
2062
2063 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2064 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2065 static s32 back_off_table[] = {
2066 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2067 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2068 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2069 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2070 10 /* CCK */
2071 };
2072
2073 /* Thermal compensation values for txpower for various frequency ranges ...
2074 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2075 static struct iwl4965_txpower_comp_entry {
2076 s32 degrees_per_05db_a;
2077 s32 degrees_per_05db_a_denom;
2078 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2079 {9, 2}, /* group 0 5.2, ch 34-43 */
2080 {4, 1}, /* group 1 5.2, ch 44-70 */
2081 {4, 1}, /* group 2 5.2, ch 71-124 */
2082 {4, 1}, /* group 3 5.2, ch 125-200 */
2083 {3, 1} /* group 4 2.4, ch all */
2084 };
2085
2086 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2087 {
2088 if (!band) {
2089 if ((rate_power_index & 7) <= 4)
2090 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2091 }
2092 return MIN_TX_GAIN_INDEX;
2093 }
2094
2095 struct gain_entry {
2096 u8 dsp;
2097 u8 radio;
2098 };
2099
2100 static const struct gain_entry gain_table[2][108] = {
2101 /* 5.2GHz power gain index table */
2102 {
2103 {123, 0x3F}, /* highest txpower */
2104 {117, 0x3F},
2105 {110, 0x3F},
2106 {104, 0x3F},
2107 {98, 0x3F},
2108 {110, 0x3E},
2109 {104, 0x3E},
2110 {98, 0x3E},
2111 {110, 0x3D},
2112 {104, 0x3D},
2113 {98, 0x3D},
2114 {110, 0x3C},
2115 {104, 0x3C},
2116 {98, 0x3C},
2117 {110, 0x3B},
2118 {104, 0x3B},
2119 {98, 0x3B},
2120 {110, 0x3A},
2121 {104, 0x3A},
2122 {98, 0x3A},
2123 {110, 0x39},
2124 {104, 0x39},
2125 {98, 0x39},
2126 {110, 0x38},
2127 {104, 0x38},
2128 {98, 0x38},
2129 {110, 0x37},
2130 {104, 0x37},
2131 {98, 0x37},
2132 {110, 0x36},
2133 {104, 0x36},
2134 {98, 0x36},
2135 {110, 0x35},
2136 {104, 0x35},
2137 {98, 0x35},
2138 {110, 0x34},
2139 {104, 0x34},
2140 {98, 0x34},
2141 {110, 0x33},
2142 {104, 0x33},
2143 {98, 0x33},
2144 {110, 0x32},
2145 {104, 0x32},
2146 {98, 0x32},
2147 {110, 0x31},
2148 {104, 0x31},
2149 {98, 0x31},
2150 {110, 0x30},
2151 {104, 0x30},
2152 {98, 0x30},
2153 {110, 0x25},
2154 {104, 0x25},
2155 {98, 0x25},
2156 {110, 0x24},
2157 {104, 0x24},
2158 {98, 0x24},
2159 {110, 0x23},
2160 {104, 0x23},
2161 {98, 0x23},
2162 {110, 0x22},
2163 {104, 0x18},
2164 {98, 0x18},
2165 {110, 0x17},
2166 {104, 0x17},
2167 {98, 0x17},
2168 {110, 0x16},
2169 {104, 0x16},
2170 {98, 0x16},
2171 {110, 0x15},
2172 {104, 0x15},
2173 {98, 0x15},
2174 {110, 0x14},
2175 {104, 0x14},
2176 {98, 0x14},
2177 {110, 0x13},
2178 {104, 0x13},
2179 {98, 0x13},
2180 {110, 0x12},
2181 {104, 0x08},
2182 {98, 0x08},
2183 {110, 0x07},
2184 {104, 0x07},
2185 {98, 0x07},
2186 {110, 0x06},
2187 {104, 0x06},
2188 {98, 0x06},
2189 {110, 0x05},
2190 {104, 0x05},
2191 {98, 0x05},
2192 {110, 0x04},
2193 {104, 0x04},
2194 {98, 0x04},
2195 {110, 0x03},
2196 {104, 0x03},
2197 {98, 0x03},
2198 {110, 0x02},
2199 {104, 0x02},
2200 {98, 0x02},
2201 {110, 0x01},
2202 {104, 0x01},
2203 {98, 0x01},
2204 {110, 0x00},
2205 {104, 0x00},
2206 {98, 0x00},
2207 {93, 0x00},
2208 {88, 0x00},
2209 {83, 0x00},
2210 {78, 0x00},
2211 },
2212 /* 2.4GHz power gain index table */
2213 {
2214 {110, 0x3f}, /* highest txpower */
2215 {104, 0x3f},
2216 {98, 0x3f},
2217 {110, 0x3e},
2218 {104, 0x3e},
2219 {98, 0x3e},
2220 {110, 0x3d},
2221 {104, 0x3d},
2222 {98, 0x3d},
2223 {110, 0x3c},
2224 {104, 0x3c},
2225 {98, 0x3c},
2226 {110, 0x3b},
2227 {104, 0x3b},
2228 {98, 0x3b},
2229 {110, 0x3a},
2230 {104, 0x3a},
2231 {98, 0x3a},
2232 {110, 0x39},
2233 {104, 0x39},
2234 {98, 0x39},
2235 {110, 0x38},
2236 {104, 0x38},
2237 {98, 0x38},
2238 {110, 0x37},
2239 {104, 0x37},
2240 {98, 0x37},
2241 {110, 0x36},
2242 {104, 0x36},
2243 {98, 0x36},
2244 {110, 0x35},
2245 {104, 0x35},
2246 {98, 0x35},
2247 {110, 0x34},
2248 {104, 0x34},
2249 {98, 0x34},
2250 {110, 0x33},
2251 {104, 0x33},
2252 {98, 0x33},
2253 {110, 0x32},
2254 {104, 0x32},
2255 {98, 0x32},
2256 {110, 0x31},
2257 {104, 0x31},
2258 {98, 0x31},
2259 {110, 0x30},
2260 {104, 0x30},
2261 {98, 0x30},
2262 {110, 0x6},
2263 {104, 0x6},
2264 {98, 0x6},
2265 {110, 0x5},
2266 {104, 0x5},
2267 {98, 0x5},
2268 {110, 0x4},
2269 {104, 0x4},
2270 {98, 0x4},
2271 {110, 0x3},
2272 {104, 0x3},
2273 {98, 0x3},
2274 {110, 0x2},
2275 {104, 0x2},
2276 {98, 0x2},
2277 {110, 0x1},
2278 {104, 0x1},
2279 {98, 0x1},
2280 {110, 0x0},
2281 {104, 0x0},
2282 {98, 0x0},
2283 {97, 0},
2284 {96, 0},
2285 {95, 0},
2286 {94, 0},
2287 {93, 0},
2288 {92, 0},
2289 {91, 0},
2290 {90, 0},
2291 {89, 0},
2292 {88, 0},
2293 {87, 0},
2294 {86, 0},
2295 {85, 0},
2296 {84, 0},
2297 {83, 0},
2298 {82, 0},
2299 {81, 0},
2300 {80, 0},
2301 {79, 0},
2302 {78, 0},
2303 {77, 0},
2304 {76, 0},
2305 {75, 0},
2306 {74, 0},
2307 {73, 0},
2308 {72, 0},
2309 {71, 0},
2310 {70, 0},
2311 {69, 0},
2312 {68, 0},
2313 {67, 0},
2314 {66, 0},
2315 {65, 0},
2316 {64, 0},
2317 {63, 0},
2318 {62, 0},
2319 {61, 0},
2320 {60, 0},
2321 {59, 0},
2322 }
2323 };
2324
2325 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2326 u8 is_fat, u8 ctrl_chan_high,
2327 struct iwl4965_tx_power_db *tx_power_tbl)
2328 {
2329 u8 saturation_power;
2330 s32 target_power;
2331 s32 user_target_power;
2332 s32 power_limit;
2333 s32 current_temp;
2334 s32 reg_limit;
2335 s32 current_regulatory;
2336 s32 txatten_grp = CALIB_CH_GROUP_MAX;
2337 int i;
2338 int c;
2339 const struct iwl4965_channel_info *ch_info = NULL;
2340 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2341 const struct iwl4965_eeprom_calib_measure *measurement;
2342 s16 voltage;
2343 s32 init_voltage;
2344 s32 voltage_compensation;
2345 s32 degrees_per_05db_num;
2346 s32 degrees_per_05db_denom;
2347 s32 factory_temp;
2348 s32 temperature_comp[2];
2349 s32 factory_gain_index[2];
2350 s32 factory_actual_pwr[2];
2351 s32 power_index;
2352
2353 /* Sanity check requested level (dBm) */
2354 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2355 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2356 priv->user_txpower_limit);
2357 return -EINVAL;
2358 }
2359 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2360 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2361 priv->user_txpower_limit);
2362 return -EINVAL;
2363 }
2364
2365 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2366 * are used for indexing into txpower table) */
2367 user_target_power = 2 * priv->user_txpower_limit;
2368
2369 /* Get current (RXON) channel, band, width */
2370 ch_info =
2371 iwl4965_get_channel_txpower_info(priv, priv->phymode, channel);
2372
2373 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2374 is_fat);
2375
2376 if (!ch_info)
2377 return -EINVAL;
2378
2379 /* get txatten group, used to select 1) thermal txpower adjustment
2380 * and 2) mimo txpower balance between Tx chains. */
2381 txatten_grp = iwl4965_get_tx_atten_grp(channel);
2382 if (txatten_grp < 0)
2383 return -EINVAL;
2384
2385 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2386 channel, txatten_grp);
2387
2388 if (is_fat) {
2389 if (ctrl_chan_high)
2390 channel -= 2;
2391 else
2392 channel += 2;
2393 }
2394
2395 /* hardware txpower limits ...
2396 * saturation (clipping distortion) txpowers are in half-dBm */
2397 if (band)
2398 saturation_power = priv->eeprom.calib_info.saturation_power24;
2399 else
2400 saturation_power = priv->eeprom.calib_info.saturation_power52;
2401
2402 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2403 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2404 if (band)
2405 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2406 else
2407 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2408 }
2409
2410 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2411 * max_power_avg values are in dBm, convert * 2 */
2412 if (is_fat)
2413 reg_limit = ch_info->fat_max_power_avg * 2;
2414 else
2415 reg_limit = ch_info->max_power_avg * 2;
2416
2417 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2418 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2419 if (band)
2420 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2421 else
2422 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2423 }
2424
2425 /* Interpolate txpower calibration values for this channel,
2426 * based on factory calibration tests on spaced channels. */
2427 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2428
2429 /* calculate tx gain adjustment based on power supply voltage */
2430 voltage = priv->eeprom.calib_info.voltage;
2431 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2432 voltage_compensation =
2433 iwl4965_get_voltage_compensation(voltage, init_voltage);
2434
2435 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2436 init_voltage,
2437 voltage, voltage_compensation);
2438
2439 /* get current temperature (Celsius) */
2440 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2441 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2442 current_temp = KELVIN_TO_CELSIUS(current_temp);
2443
2444 /* select thermal txpower adjustment params, based on channel group
2445 * (same frequency group used for mimo txatten adjustment) */
2446 degrees_per_05db_num =
2447 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2448 degrees_per_05db_denom =
2449 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2450
2451 /* get per-chain txpower values from factory measurements */
2452 for (c = 0; c < 2; c++) {
2453 measurement = &ch_eeprom_info.measurements[c][1];
2454
2455 /* txgain adjustment (in half-dB steps) based on difference
2456 * between factory and current temperature */
2457 factory_temp = measurement->temperature;
2458 iwl4965_math_div_round((current_temp - factory_temp) *
2459 degrees_per_05db_denom,
2460 degrees_per_05db_num,
2461 &temperature_comp[c]);
2462
2463 factory_gain_index[c] = measurement->gain_idx;
2464 factory_actual_pwr[c] = measurement->actual_pow;
2465
2466 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2467 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2468 "curr tmp %d, comp %d steps\n",
2469 factory_temp, current_temp,
2470 temperature_comp[c]);
2471
2472 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2473 factory_gain_index[c],
2474 factory_actual_pwr[c]);
2475 }
2476
2477 /* for each of 33 bit-rates (including 1 for CCK) */
2478 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2479 u8 is_mimo_rate;
2480 union iwl4965_tx_power_dual_stream tx_power;
2481
2482 /* for mimo, reduce each chain's txpower by half
2483 * (3dB, 6 steps), so total output power is regulatory
2484 * compliant. */
2485 if (i & 0x8) {
2486 current_regulatory = reg_limit -
2487 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2488 is_mimo_rate = 1;
2489 } else {
2490 current_regulatory = reg_limit;
2491 is_mimo_rate = 0;
2492 }
2493
2494 /* find txpower limit, either hardware or regulatory */
2495 power_limit = saturation_power - back_off_table[i];
2496 if (power_limit > current_regulatory)
2497 power_limit = current_regulatory;
2498
2499 /* reduce user's txpower request if necessary
2500 * for this rate on this channel */
2501 target_power = user_target_power;
2502 if (target_power > power_limit)
2503 target_power = power_limit;
2504
2505 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2506 i, saturation_power - back_off_table[i],
2507 current_regulatory, user_target_power,
2508 target_power);
2509
2510 /* for each of 2 Tx chains (radio transmitters) */
2511 for (c = 0; c < 2; c++) {
2512 s32 atten_value;
2513
2514 if (is_mimo_rate)
2515 atten_value =
2516 (s32)le32_to_cpu(priv->card_alive_init.
2517 tx_atten[txatten_grp][c]);
2518 else
2519 atten_value = 0;
2520
2521 /* calculate index; higher index means lower txpower */
2522 power_index = (u8) (factory_gain_index[c] -
2523 (target_power -
2524 factory_actual_pwr[c]) -
2525 temperature_comp[c] -
2526 voltage_compensation +
2527 atten_value);
2528
2529 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2530 power_index); */
2531
2532 if (power_index < get_min_power_index(i, band))
2533 power_index = get_min_power_index(i, band);
2534
2535 /* adjust 5 GHz index to support negative indexes */
2536 if (!band)
2537 power_index += 9;
2538
2539 /* CCK, rate 32, reduce txpower for CCK */
2540 if (i == POWER_TABLE_CCK_ENTRY)
2541 power_index +=
2542 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2543
2544 /* stay within the table! */
2545 if (power_index > 107) {
2546 IWL_WARNING("txpower index %d > 107\n",
2547 power_index);
2548 power_index = 107;
2549 }
2550 if (power_index < 0) {
2551 IWL_WARNING("txpower index %d < 0\n",
2552 power_index);
2553 power_index = 0;
2554 }
2555
2556 /* fill txpower command for this rate/chain */
2557 tx_power.s.radio_tx_gain[c] =
2558 gain_table[band][power_index].radio;
2559 tx_power.s.dsp_predis_atten[c] =
2560 gain_table[band][power_index].dsp;
2561
2562 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2563 "gain 0x%02x dsp %d\n",
2564 c, atten_value, power_index,
2565 tx_power.s.radio_tx_gain[c],
2566 tx_power.s.dsp_predis_atten[c]);
2567 }/* for each chain */
2568
2569 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2570
2571 }/* for each rate */
2572
2573 return 0;
2574 }
2575
2576 /**
2577 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2578 *
2579 * Uses the active RXON for channel, band, and characteristics (fat, high)
2580 * The power limit is taken from priv->user_txpower_limit.
2581 */
2582 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2583 {
2584 struct iwl4965_txpowertable_cmd cmd = { 0 };
2585 int rc = 0;
2586 u8 band = 0;
2587 u8 is_fat = 0;
2588 u8 ctrl_chan_high = 0;
2589
2590 if (test_bit(STATUS_SCANNING, &priv->status)) {
2591 /* If this gets hit a lot, switch it to a BUG() and catch
2592 * the stack trace to find out who is calling this during
2593 * a scan. */
2594 IWL_WARNING("TX Power requested while scanning!\n");
2595 return -EAGAIN;
2596 }
2597
2598 band = ((priv->phymode == MODE_IEEE80211B) ||
2599 (priv->phymode == MODE_IEEE80211G));
2600
2601 is_fat = is_fat_channel(priv->active_rxon.flags);
2602
2603 if (is_fat &&
2604 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2605 ctrl_chan_high = 1;
2606
2607 cmd.band = band;
2608 cmd.channel = priv->active_rxon.channel;
2609
2610 rc = iwl4965_fill_txpower_tbl(priv, band,
2611 le16_to_cpu(priv->active_rxon.channel),
2612 is_fat, ctrl_chan_high, &cmd.tx_power);
2613 if (rc)
2614 return rc;
2615
2616 rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2617 return rc;
2618 }
2619
2620 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2621 {
2622 int rc;
2623 u8 band = 0;
2624 u8 is_fat = 0;
2625 u8 ctrl_chan_high = 0;
2626 struct iwl4965_channel_switch_cmd cmd = { 0 };
2627 const struct iwl4965_channel_info *ch_info;
2628
2629 band = ((priv->phymode == MODE_IEEE80211B) ||
2630 (priv->phymode == MODE_IEEE80211G));
2631
2632 ch_info = iwl4965_get_channel_info(priv, priv->phymode, channel);
2633
2634 is_fat = is_fat_channel(priv->staging_rxon.flags);
2635
2636 if (is_fat &&
2637 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2638 ctrl_chan_high = 1;
2639
2640 cmd.band = band;
2641 cmd.expect_beacon = 0;
2642 cmd.channel = cpu_to_le16(channel);
2643 cmd.rxon_flags = priv->active_rxon.flags;
2644 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2645 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2646 if (ch_info)
2647 cmd.expect_beacon = is_channel_radar(ch_info);
2648 else
2649 cmd.expect_beacon = 1;
2650
2651 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2652 ctrl_chan_high, &cmd.tx_power);
2653 if (rc) {
2654 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2655 return rc;
2656 }
2657
2658 rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2659 return rc;
2660 }
2661
2662 #define RTS_HCCA_RETRY_LIMIT 3
2663 #define RTS_DFAULT_RETRY_LIMIT 60
2664
2665 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2666 struct iwl4965_cmd *cmd,
2667 struct ieee80211_tx_control *ctrl,
2668 struct ieee80211_hdr *hdr, int sta_id,
2669 int is_hcca)
2670 {
2671 struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2672 u8 rts_retry_limit = 0;
2673 u8 data_retry_limit = 0;
2674 u16 fc = le16_to_cpu(hdr->frame_control);
2675 u8 rate_plcp;
2676 u16 rate_flags = 0;
2677 int rate_idx = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
2678
2679 rate_plcp = iwl4965_rates[rate_idx].plcp;
2680
2681 rts_retry_limit = (is_hcca) ?
2682 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2683
2684 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2685 rate_flags |= RATE_MCS_CCK_MSK;
2686
2687
2688 if (ieee80211_is_probe_response(fc)) {
2689 data_retry_limit = 3;
2690 if (data_retry_limit < rts_retry_limit)
2691 rts_retry_limit = data_retry_limit;
2692 } else
2693 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2694
2695 if (priv->data_retry_limit != -1)
2696 data_retry_limit = priv->data_retry_limit;
2697
2698
2699 if (ieee80211_is_data(fc)) {
2700 tx->initial_rate_index = 0;
2701 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2702 } else {
2703 switch (fc & IEEE80211_FCTL_STYPE) {
2704 case IEEE80211_STYPE_AUTH:
2705 case IEEE80211_STYPE_DEAUTH:
2706 case IEEE80211_STYPE_ASSOC_REQ:
2707 case IEEE80211_STYPE_REASSOC_REQ:
2708 if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2709 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2710 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2711 }
2712 break;
2713 default:
2714 break;
2715 }
2716
2717 /* Alternate between antenna A and B for successive frames */
2718 if (priv->use_ant_b_for_management_frame) {
2719 priv->use_ant_b_for_management_frame = 0;
2720 rate_flags |= RATE_MCS_ANT_B_MSK;
2721 } else {
2722 priv->use_ant_b_for_management_frame = 1;
2723 rate_flags |= RATE_MCS_ANT_A_MSK;
2724 }
2725 }
2726
2727 tx->rts_retry_limit = rts_retry_limit;
2728 tx->data_retry_limit = data_retry_limit;
2729 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2730 }
2731
2732 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2733 {
2734 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2735
2736 return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2737 }
2738
2739 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2740 {
2741 return priv->temperature;
2742 }
2743
2744 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2745 struct iwl4965_frame *frame, u8 rate)
2746 {
2747 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2748 unsigned int frame_size;
2749
2750 tx_beacon_cmd = &frame->u.beacon;
2751 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2752
2753 tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2754 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2755
2756 frame_size = iwl4965_fill_beacon_frame(priv,
2757 tx_beacon_cmd->frame,
2758 iwl4965_broadcast_addr,
2759 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2760
2761 BUG_ON(frame_size > MAX_MPDU_SIZE);
2762 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2763
2764 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2765 tx_beacon_cmd->tx.rate_n_flags =
2766 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2767 else
2768 tx_beacon_cmd->tx.rate_n_flags =
2769 iwl4965_hw_set_rate_n_flags(rate, 0);
2770
2771 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2772 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2773 return (sizeof(*tx_beacon_cmd) + frame_size);
2774 }
2775
2776 /*
2777 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2778 * given Tx queue, and enable the DMA channel used for that queue.
2779 *
2780 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2781 * channels supported in hardware.
2782 */
2783 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2784 {
2785 int rc;
2786 unsigned long flags;
2787 int txq_id = txq->q.id;
2788
2789 spin_lock_irqsave(&priv->lock, flags);
2790 rc = iwl4965_grab_nic_access(priv);
2791 if (rc) {
2792 spin_unlock_irqrestore(&priv->lock, flags);
2793 return rc;
2794 }
2795
2796 /* Circular buffer (TFD queue in DRAM) physical base address */
2797 iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2798 txq->q.dma_addr >> 8);
2799
2800 /* Enable DMA channel, using same id as for TFD queue */
2801 iwl4965_write_direct32(
2802 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2803 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2804 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2805 iwl4965_release_nic_access(priv);
2806 spin_unlock_irqrestore(&priv->lock, flags);
2807
2808 return 0;
2809 }
2810
2811 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2812 dma_addr_t addr, u16 len)
2813 {
2814 int index, is_odd;
2815 struct iwl4965_tfd_frame *tfd = ptr;
2816 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2817
2818 /* Each TFD can point to a maximum 20 Tx buffers */
2819 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2820 IWL_ERROR("Error can not send more than %d chunks\n",
2821 MAX_NUM_OF_TBS);
2822 return -EINVAL;
2823 }
2824
2825 index = num_tbs / 2;
2826 is_odd = num_tbs & 0x1;
2827
2828 if (!is_odd) {
2829 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2830 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2831 iwl_get_dma_hi_address(addr));
2832 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2833 } else {
2834 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2835 (u32) (addr & 0xffff));
2836 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2837 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2838 }
2839
2840 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2841
2842 return 0;
2843 }
2844
2845 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2846 {
2847 u16 hw_version = priv->eeprom.board_revision_4965;
2848
2849 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2850 ((hw_version >> 8) & 0x0F),
2851 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2852
2853 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2854 priv->eeprom.board_pba_number_4965);
2855 }
2856
2857 #define IWL_TX_CRC_SIZE 4
2858 #define IWL_TX_DELIMITER_SIZE 4
2859
2860 /**
2861 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2862 */
2863 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2864 struct iwl4965_tx_queue *txq, u16 byte_cnt)
2865 {
2866 int len;
2867 int txq_id = txq->q.id;
2868 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2869
2870 if (txq->need_update == 0)
2871 return 0;
2872
2873 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2874
2875 /* Set up byte count within first 256 entries */
2876 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2877 tfd_offset[txq->q.write_ptr], byte_cnt, len);
2878
2879 /* If within first 64 entries, duplicate at end */
2880 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2881 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2882 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2883 byte_cnt, len);
2884
2885 return 0;
2886 }
2887
2888 /**
2889 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2890 *
2891 * Selects how many and which Rx receivers/antennas/chains to use.
2892 * This should not be used for scan command ... it puts data in wrong place.
2893 */
2894 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2895 {
2896 u8 is_single = is_single_stream(priv);
2897 u8 idle_state, rx_state;
2898
2899 priv->staging_rxon.rx_chain = 0;
2900 rx_state = idle_state = 3;
2901
2902 /* Tell uCode which antennas are actually connected.
2903 * Before first association, we assume all antennas are connected.
2904 * Just after first association, iwl4965_noise_calibration()
2905 * checks which antennas actually *are* connected. */
2906 priv->staging_rxon.rx_chain |=
2907 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2908
2909 /* How many receivers should we use? */
2910 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2911 priv->staging_rxon.rx_chain |=
2912 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2913 priv->staging_rxon.rx_chain |=
2914 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2915
2916 if (!is_single && (rx_state >= 2) &&
2917 !test_bit(STATUS_POWER_PMI, &priv->status))
2918 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2919 else
2920 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2921
2922 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2923 }
2924
2925 #ifdef CONFIG_IWL4965_HT
2926 #ifdef CONFIG_IWL4965_HT_AGG
2927 /*
2928 get the traffic load value for tid
2929 */
2930 static u32 iwl4965_tl_get_load(struct iwl4965_priv *priv, u8 tid)
2931 {
2932 u32 load = 0;
2933 u32 current_time = jiffies_to_msecs(jiffies);
2934 u32 time_diff;
2935 s32 index;
2936 unsigned long flags;
2937 struct iwl4965_traffic_load *tid_ptr = NULL;
2938
2939 if (tid >= TID_MAX_LOAD_COUNT)
2940 return 0;
2941
2942 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2943
2944 current_time -= current_time % TID_ROUND_VALUE;
2945
2946 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2947 if (!(tid_ptr->queue_count))
2948 goto out;
2949
2950 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2951 index = time_diff / TID_QUEUE_CELL_SPACING;
2952
2953 if (index >= TID_QUEUE_MAX_SIZE) {
2954 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2955
2956 while (tid_ptr->queue_count &&
2957 (tid_ptr->time_stamp < oldest_time)) {
2958 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2959 tid_ptr->packet_count[tid_ptr->head] = 0;
2960 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2961 tid_ptr->queue_count--;
2962 tid_ptr->head++;
2963 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2964 tid_ptr->head = 0;
2965 }
2966 }
2967 load = tid_ptr->total;
2968
2969 out:
2970 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2971 return load;
2972 }
2973
2974 /*
2975 increment traffic load value for tid and also remove
2976 any old values if passed the certian time period
2977 */
2978 static void iwl4965_tl_add_packet(struct iwl4965_priv *priv, u8 tid)
2979 {
2980 u32 current_time = jiffies_to_msecs(jiffies);
2981 u32 time_diff;
2982 s32 index;
2983 unsigned long flags;
2984 struct iwl4965_traffic_load *tid_ptr = NULL;
2985
2986 if (tid >= TID_MAX_LOAD_COUNT)
2987 return;
2988
2989 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2990
2991 current_time -= current_time % TID_ROUND_VALUE;
2992
2993 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2994 if (!(tid_ptr->queue_count)) {
2995 tid_ptr->total = 1;
2996 tid_ptr->time_stamp = current_time;
2997 tid_ptr->queue_count = 1;
2998 tid_ptr->head = 0;
2999 tid_ptr->packet_count[0] = 1;
3000 goto out;
3001 }
3002
3003 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
3004 index = time_diff / TID_QUEUE_CELL_SPACING;
3005
3006 if (index >= TID_QUEUE_MAX_SIZE) {
3007 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
3008
3009 while (tid_ptr->queue_count &&
3010 (tid_ptr->time_stamp < oldest_time)) {
3011 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
3012 tid_ptr->packet_count[tid_ptr->head] = 0;
3013 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
3014 tid_ptr->queue_count--;
3015 tid_ptr->head++;
3016 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
3017 tid_ptr->head = 0;
3018 }
3019 }
3020
3021 index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE;
3022 tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1;
3023 tid_ptr->total = tid_ptr->total + 1;
3024
3025 if ((index + 1) > tid_ptr->queue_count)
3026 tid_ptr->queue_count = index + 1;
3027 out:
3028 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3029
3030 }
3031
3032 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7
3033 enum HT_STATUS {
3034 BA_STATUS_FAILURE = 0,
3035 BA_STATUS_INITIATOR_DELBA,
3036 BA_STATUS_RECIPIENT_DELBA,
3037 BA_STATUS_RENEW_ADDBA_REQUEST,
3038 BA_STATUS_ACTIVE,
3039 };
3040
3041 /**
3042 * iwl4964_tl_ba_avail - Find out if an unused aggregation queue is available
3043 */
3044 static u8 iwl4964_tl_ba_avail(struct iwl4965_priv *priv)
3045 {
3046 int i;
3047 struct iwl4965_lq_mngr *lq;
3048 u8 count = 0;
3049 u16 msk;
3050
3051 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3052
3053 /* Find out how many agg queues are in use */
3054 for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) {
3055 msk = 1 << i;
3056 if ((lq->agg_ctrl.granted_ba & msk) ||
3057 (lq->agg_ctrl.wait_for_agg_status & msk))
3058 count++;
3059 }
3060
3061 if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS)
3062 return 1;
3063
3064 return 0;
3065 }
3066
3067 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3068 u8 tid, enum HT_STATUS status);
3069
3070 static int iwl4965_perform_addba(struct iwl4965_priv *priv, u8 tid, u32 length,
3071 u32 ba_timeout)
3072 {
3073 int rc;
3074
3075 rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid);
3076 if (rc)
3077 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3078
3079 return rc;
3080 }
3081
3082 static int iwl4965_perform_delba(struct iwl4965_priv *priv, u8 tid)
3083 {
3084 int rc;
3085
3086 rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid);
3087 if (rc)
3088 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3089
3090 return rc;
3091 }
3092
3093 static void iwl4965_turn_on_agg_for_tid(struct iwl4965_priv *priv,
3094 struct iwl4965_lq_mngr *lq,
3095 u8 auto_agg, u8 tid)
3096 {
3097 u32 tid_msk = (1 << tid);
3098 unsigned long flags;
3099
3100 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3101 /*
3102 if ((auto_agg) && (!lq->enable_counter)){
3103 lq->agg_ctrl.next_retry = 0;
3104 lq->agg_ctrl.tid_retry = 0;
3105 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3106 return;
3107 }
3108 */
3109 if (!(lq->agg_ctrl.granted_ba & tid_msk) &&
3110 (lq->agg_ctrl.requested_ba & tid_msk)) {
3111 u8 available_queues;
3112 u32 load;
3113
3114 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3115 available_queues = iwl4964_tl_ba_avail(priv);
3116 load = iwl4965_tl_get_load(priv, tid);
3117
3118 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3119 if (!available_queues) {
3120 if (auto_agg)
3121 lq->agg_ctrl.tid_retry |= tid_msk;
3122 else {
3123 lq->agg_ctrl.requested_ba &= ~tid_msk;
3124 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3125 }
3126 } else if ((auto_agg) &&
3127 ((load <= lq->agg_ctrl.tid_traffic_load_threshold) ||
3128 ((lq->agg_ctrl.wait_for_agg_status & tid_msk))))
3129 lq->agg_ctrl.tid_retry |= tid_msk;
3130 else {
3131 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3132 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3133 iwl4965_perform_addba(priv, tid, 0x40,
3134 lq->agg_ctrl.ba_timeout);
3135 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3136 }
3137 }
3138 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3139 }
3140
3141 static void iwl4965_turn_on_agg(struct iwl4965_priv *priv, u8 tid)
3142 {
3143 struct iwl4965_lq_mngr *lq;
3144 unsigned long flags;
3145
3146 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3147
3148 if ((tid < TID_MAX_LOAD_COUNT))
3149 iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg,
3150 tid);
3151 else if (tid == TID_ALL_SPECIFIED) {
3152 if (lq->agg_ctrl.requested_ba) {
3153 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
3154 iwl4965_turn_on_agg_for_tid(priv, lq,
3155 lq->agg_ctrl.auto_agg, tid);
3156 } else {
3157 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3158 lq->agg_ctrl.tid_retry = 0;
3159 lq->agg_ctrl.next_retry = 0;
3160 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3161 }
3162 }
3163
3164 }
3165
3166 void iwl4965_turn_off_agg(struct iwl4965_priv *priv, u8 tid)
3167 {
3168 u32 tid_msk;
3169 struct iwl4965_lq_mngr *lq;
3170 unsigned long flags;
3171
3172 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3173
3174 if ((tid < TID_MAX_LOAD_COUNT)) {
3175 tid_msk = 1 << tid;
3176 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3177 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3178 lq->agg_ctrl.requested_ba &= ~tid_msk;
3179 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3180 iwl4965_perform_delba(priv, tid);
3181 } else if (tid == TID_ALL_SPECIFIED) {
3182 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3183 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3184 tid_msk = 1 << tid;
3185 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3186 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3187 iwl4965_perform_delba(priv, tid);
3188 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3189 }
3190 lq->agg_ctrl.requested_ba = 0;
3191 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3192 }
3193 }
3194
3195 /**
3196 * iwl4965_ba_status - Update driver's link quality mgr with tid's HT status
3197 */
3198 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3199 u8 tid, enum HT_STATUS status)
3200 {
3201 struct iwl4965_lq_mngr *lq;
3202 u32 tid_msk = (1 << tid);
3203 unsigned long flags;
3204
3205 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3206
3207 if ((tid >= TID_MAX_LOAD_COUNT))
3208 goto out;
3209
3210 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3211 switch (status) {
3212 case BA_STATUS_ACTIVE:
3213 if (!(lq->agg_ctrl.granted_ba & tid_msk))
3214 lq->agg_ctrl.granted_ba |= tid_msk;
3215 break;
3216 default:
3217 if ((lq->agg_ctrl.granted_ba & tid_msk))
3218 lq->agg_ctrl.granted_ba &= ~tid_msk;
3219 break;
3220 }
3221
3222 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3223 if (status != BA_STATUS_ACTIVE) {
3224 if (lq->agg_ctrl.auto_agg) {
3225 lq->agg_ctrl.tid_retry |= tid_msk;
3226 lq->agg_ctrl.next_retry =
3227 jiffies + msecs_to_jiffies(500);
3228 } else
3229 lq->agg_ctrl.requested_ba &= ~tid_msk;
3230 }
3231 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3232 out:
3233 return;
3234 }
3235
3236 static void iwl4965_bg_agg_work(struct work_struct *work)
3237 {
3238 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
3239 agg_work);
3240
3241 u32 tid;
3242 u32 retry_tid;
3243 u32 tid_msk;
3244 unsigned long flags;
3245 struct iwl4965_lq_mngr *lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3246
3247 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3248 retry_tid = lq->agg_ctrl.tid_retry;
3249 lq->agg_ctrl.tid_retry = 0;
3250 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3251
3252 if (retry_tid == TID_ALL_SPECIFIED)
3253 iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED);
3254 else {
3255 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3256 tid_msk = (1 << tid);
3257 if (retry_tid & tid_msk)
3258 iwl4965_turn_on_agg(priv, tid);
3259 }
3260 }
3261
3262 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3263 if (lq->agg_ctrl.tid_retry)
3264 lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500);
3265 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3266 return;
3267 }
3268
3269 /* TODO: move this functionality to rate scaling */
3270 void iwl4965_tl_get_stats(struct iwl4965_priv *priv,
3271 struct ieee80211_hdr *hdr)
3272 {
3273 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3274
3275 if (qc &&
3276 (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) {
3277 u8 tid = 0;
3278 tid = (u8) (le16_to_cpu(*qc) & 0xF);
3279 if (tid < TID_MAX_LOAD_COUNT)
3280 iwl4965_tl_add_packet(priv, tid);
3281 }
3282
3283 if (priv->lq_mngr.agg_ctrl.next_retry &&
3284 (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) {
3285 unsigned long flags;
3286
3287 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3288 priv->lq_mngr.agg_ctrl.next_retry = 0;
3289 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3290 schedule_work(&priv->agg_work);
3291 }
3292 }
3293
3294 #endif /*CONFIG_IWL4965_HT_AGG */
3295 #endif /* CONFIG_IWL4965_HT */
3296
3297 /**
3298 * sign_extend - Sign extend a value using specified bit as sign-bit
3299 *
3300 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3301 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3302 *
3303 * @param oper value to sign extend
3304 * @param index 0 based bit index (0<=index<32) to sign bit
3305 */
3306 static s32 sign_extend(u32 oper, int index)
3307 {
3308 u8 shift = 31 - index;
3309
3310 return (s32)(oper << shift) >> shift;
3311 }
3312
3313 /**
3314 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3315 * @statistics: Provides the temperature reading from the uCode
3316 *
3317 * A return of <0 indicates bogus data in the statistics
3318 */
3319 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3320 {
3321 s32 temperature;
3322 s32 vt;
3323 s32 R1, R2, R3;
3324 u32 R4;
3325
3326 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3327 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3328 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3329 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3330 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3331 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3332 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3333 } else {
3334 IWL_DEBUG_TEMP("Running temperature calibration\n");
3335 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3336 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3337 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3338 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3339 }
3340
3341 /*
3342 * Temperature is only 23 bits, so sign extend out to 32.
3343 *
3344 * NOTE If we haven't received a statistics notification yet
3345 * with an updated temperature, use R4 provided to us in the
3346 * "initialize" ALIVE response.
3347 */
3348 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3349 vt = sign_extend(R4, 23);
3350 else
3351 vt = sign_extend(
3352 le32_to_cpu(priv->statistics.general.temperature), 23);
3353
3354 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3355 R1, R2, R3, vt);
3356
3357 if (R3 == R1) {
3358 IWL_ERROR("Calibration conflict R1 == R3\n");
3359 return -1;
3360 }
3361
3362 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3363 * Add offset to center the adjustment around 0 degrees Centigrade. */
3364 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3365 temperature /= (R3 - R1);
3366 temperature = (temperature * 97) / 100 +
3367 TEMPERATURE_CALIB_KELVIN_OFFSET;
3368
3369 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3370 KELVIN_TO_CELSIUS(temperature));
3371
3372 return temperature;
3373 }
3374
3375 /* Adjust Txpower only if temperature variance is greater than threshold. */
3376 #define IWL_TEMPERATURE_THRESHOLD 3
3377
3378 /**
3379 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3380 *
3381 * If the temperature changed has changed sufficiently, then a recalibration
3382 * is needed.
3383 *
3384 * Assumes caller will replace priv->last_temperature once calibration
3385 * executed.
3386 */
3387 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3388 {
3389 int temp_diff;
3390
3391 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3392 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3393 return 0;
3394 }
3395
3396 temp_diff = priv->temperature - priv->last_temperature;
3397
3398 /* get absolute value */
3399 if (temp_diff < 0) {
3400 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3401 temp_diff = -temp_diff;
3402 } else if (temp_diff == 0)
3403 IWL_DEBUG_POWER("Same temp, \n");
3404 else
3405 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3406
3407 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3408 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3409 return 0;
3410 }
3411
3412 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3413
3414 return 1;
3415 }
3416
3417 /* Calculate noise level, based on measurements during network silence just
3418 * before arriving beacon. This measurement can be done only if we know
3419 * exactly when to expect beacons, therefore only when we're associated. */
3420 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3421 {
3422 struct statistics_rx_non_phy *rx_info
3423 = &(priv->statistics.rx.general);
3424 int num_active_rx = 0;
3425 int total_silence = 0;
3426 int bcn_silence_a =
3427 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3428 int bcn_silence_b =
3429 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3430 int bcn_silence_c =
3431 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3432
3433 if (bcn_silence_a) {
3434 total_silence += bcn_silence_a;
3435 num_active_rx++;
3436 }
3437 if (bcn_silence_b) {
3438 total_silence += bcn_silence_b;
3439 num_active_rx++;
3440 }
3441 if (bcn_silence_c) {
3442 total_silence += bcn_silence_c;
3443 num_active_rx++;
3444 }
3445
3446 /* Average among active antennas */
3447 if (num_active_rx)
3448 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3449 else
3450 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3451
3452 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3453 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3454 priv->last_rx_noise);
3455 }
3456
3457 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3458 {
3459 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3460 int change;
3461 s32 temp;
3462
3463 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3464 (int)sizeof(priv->statistics), pkt->len);
3465
3466 change = ((priv->statistics.general.temperature !=
3467 pkt->u.stats.general.temperature) ||
3468 ((priv->statistics.flag &
3469 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3470 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3471
3472 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3473
3474 set_bit(STATUS_STATISTICS, &priv->status);
3475
3476 /* Reschedule the statistics timer to occur in
3477 * REG_RECALIB_PERIOD seconds to ensure we get a
3478 * thermal update even if the uCode doesn't give
3479 * us one */
3480 mod_timer(&priv->statistics_periodic, jiffies +
3481 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3482
3483 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3484 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3485 iwl4965_rx_calc_noise(priv);
3486 #ifdef CONFIG_IWL4965_SENSITIVITY
3487 queue_work(priv->workqueue, &priv->sensitivity_work);
3488 #endif
3489 }
3490
3491 /* If the hardware hasn't reported a change in
3492 * temperature then don't bother computing a
3493 * calibrated temperature value */
3494 if (!change)
3495 return;
3496
3497 temp = iwl4965_get_temperature(priv);
3498 if (temp < 0)
3499 return;
3500
3501 if (priv->temperature != temp) {
3502 if (priv->temperature)
3503 IWL_DEBUG_TEMP("Temperature changed "
3504 "from %dC to %dC\n",
3505 KELVIN_TO_CELSIUS(priv->temperature),
3506 KELVIN_TO_CELSIUS(temp));
3507 else
3508 IWL_DEBUG_TEMP("Temperature "
3509 "initialized to %dC\n",
3510 KELVIN_TO_CELSIUS(temp));
3511 }
3512
3513 priv->temperature = temp;
3514 set_bit(STATUS_TEMPERATURE, &priv->status);
3515
3516 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3517 iwl4965_is_temp_calib_needed(priv))
3518 queue_work(priv->workqueue, &priv->txpower_work);
3519 }
3520
3521 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3522 struct sk_buff *skb,
3523 struct iwl4965_rx_phy_res *rx_start,
3524 struct ieee80211_rx_status *stats,
3525 u32 ampdu_status)
3526 {
3527 s8 signal = stats->ssi;
3528 s8 noise = 0;
3529 int rate = stats->rate;
3530 u64 tsf = stats->mactime;
3531 __le16 phy_flags_hw = rx_start->phy_flags;
3532 struct iwl4965_rt_rx_hdr {
3533 struct ieee80211_radiotap_header rt_hdr;
3534 __le64 rt_tsf; /* TSF */
3535 u8 rt_flags; /* radiotap packet flags */
3536 u8 rt_rate; /* rate in 500kb/s */
3537 __le16 rt_channelMHz; /* channel in MHz */
3538 __le16 rt_chbitmask; /* channel bitfield */
3539 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3540 s8 rt_dbmnoise;
3541 u8 rt_antenna; /* antenna number */
3542 } __attribute__ ((packed)) *iwl4965_rt;
3543
3544 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3545 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3546 if (net_ratelimit())
3547 printk(KERN_ERR "not enough headroom [%d] for "
3548 "radiotap head [%zd]\n",
3549 skb_headroom(skb), sizeof(*iwl4965_rt));
3550 return;
3551 }
3552
3553 /* put radiotap header in front of 802.11 header and data */
3554 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3555
3556 /* initialise radiotap header */
3557 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3558 iwl4965_rt->rt_hdr.it_pad = 0;
3559
3560 /* total header + data */
3561 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3562 &iwl4965_rt->rt_hdr.it_len);
3563
3564 /* Indicate all the fields we add to the radiotap header */
3565 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3566 (1 << IEEE80211_RADIOTAP_FLAGS) |
3567 (1 << IEEE80211_RADIOTAP_RATE) |
3568 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3569 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3570 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3571 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3572 &iwl4965_rt->rt_hdr.it_present);
3573
3574 /* Zero the flags, we'll add to them as we go */
3575 iwl4965_rt->rt_flags = 0;
3576
3577 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3578
3579 iwl4965_rt->rt_dbmsignal = signal;
3580 iwl4965_rt->rt_dbmnoise = noise;
3581
3582 /* Convert the channel frequency and set the flags */
3583 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3584 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3585 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3586 IEEE80211_CHAN_5GHZ),
3587 &iwl4965_rt->rt_chbitmask);
3588 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3589 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3590 IEEE80211_CHAN_2GHZ),
3591 &iwl4965_rt->rt_chbitmask);
3592 else /* 802.11g */
3593 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3594 IEEE80211_CHAN_2GHZ),
3595 &iwl4965_rt->rt_chbitmask);
3596
3597 rate = iwl4965_rate_index_from_plcp(rate);
3598 if (rate == -1)
3599 iwl4965_rt->rt_rate = 0;
3600 else
3601 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3602
3603 /*
3604 * "antenna number"
3605 *
3606 * It seems that the antenna field in the phy flags value
3607 * is actually a bitfield. This is undefined by radiotap,
3608 * it wants an actual antenna number but I always get "7"
3609 * for most legacy frames I receive indicating that the
3610 * same frame was received on all three RX chains.
3611 *
3612 * I think this field should be removed in favour of a
3613 * new 802.11n radiotap field "RX chains" that is defined
3614 * as a bitmask.
3615 */
3616 iwl4965_rt->rt_antenna =
3617 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3618
3619 /* set the preamble flag if appropriate */
3620 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3621 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3622
3623 stats->flag |= RX_FLAG_RADIOTAP;
3624 }
3625
3626 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3627 int include_phy,
3628 struct iwl4965_rx_mem_buffer *rxb,
3629 struct ieee80211_rx_status *stats)
3630 {
3631 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3632 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3633 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3634 struct ieee80211_hdr *hdr;
3635 u16 len;
3636 __le32 *rx_end;
3637 unsigned int skblen;
3638 u32 ampdu_status;
3639
3640 if (!include_phy && priv->last_phy_res[0])
3641 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3642
3643 if (!rx_start) {
3644 IWL_ERROR("MPDU frame without a PHY data\n");
3645 return;
3646 }
3647 if (include_phy) {
3648 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3649 rx_start->cfg_phy_cnt);
3650
3651 len = le16_to_cpu(rx_start->byte_count);
3652
3653 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3654 sizeof(struct iwl4965_rx_phy_res) +
3655 rx_start->cfg_phy_cnt + len);
3656
3657 } else {
3658 struct iwl4965_rx_mpdu_res_start *amsdu =
3659 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3660
3661 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3662 sizeof(struct iwl4965_rx_mpdu_res_start));
3663 len = le16_to_cpu(amsdu->byte_count);
3664 rx_start->byte_count = amsdu->byte_count;
3665 rx_end = (__le32 *) (((u8 *) hdr) + len);
3666 }
3667 if (len > priv->hw_setting.max_pkt_size || len < 16) {
3668 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3669 return;
3670 }
3671
3672 ampdu_status = le32_to_cpu(*rx_end);
3673 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3674
3675 /* start from MAC */
3676 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3677 skb_put(rxb->skb, len); /* end where data ends */
3678
3679 /* We only process data packets if the interface is open */
3680 if (unlikely(!priv->is_open)) {
3681 IWL_DEBUG_DROP_LIMIT
3682 ("Dropping packet while interface is not open.\n");
3683 return;
3684 }
3685
3686 stats->flag = 0;
3687 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3688
3689 if (iwl4965_param_hwcrypto)
3690 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3691
3692 if (priv->add_radiotap)
3693 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3694
3695 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3696 priv->alloc_rxb_skb--;
3697 rxb->skb = NULL;
3698 #ifdef LED
3699 priv->led_packets += len;
3700 iwl4965_setup_activity_timer(priv);
3701 #endif
3702 }
3703
3704 /* Calc max signal level (dBm) among 3 possible receivers */
3705 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3706 {
3707 /* data from PHY/DSP regarding signal strength, etc.,
3708 * contents are always there, not configurable by host. */
3709 struct iwl4965_rx_non_cfg_phy *ncphy =
3710 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3711 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3712 >> IWL_AGC_DB_POS;
3713
3714 u32 valid_antennae =
3715 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3716 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3717 u8 max_rssi = 0;
3718 u32 i;
3719
3720 /* Find max rssi among 3 possible receivers.
3721 * These values are measured by the digital signal processor (DSP).
3722 * They should stay fairly constant even as the signal strength varies,
3723 * if the radio's automatic gain control (AGC) is working right.
3724 * AGC value (see below) will provide the "interesting" info. */
3725 for (i = 0; i < 3; i++)
3726 if (valid_antennae & (1 << i))
3727 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3728
3729 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3730 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3731 max_rssi, agc);
3732
3733 /* dBm = max_rssi dB - agc dB - constant.
3734 * Higher AGC (higher radio gain) means lower signal. */
3735 return (max_rssi - agc - IWL_RSSI_OFFSET);
3736 }
3737
3738 #ifdef CONFIG_IWL4965_HT
3739
3740 /* Parsed Information Elements */
3741 struct ieee802_11_elems {
3742 u8 *ds_params;
3743 u8 ds_params_len;
3744 u8 *tim;
3745 u8 tim_len;
3746 u8 *ibss_params;
3747 u8 ibss_params_len;
3748 u8 *erp_info;
3749 u8 erp_info_len;
3750 u8 *ht_cap_param;
3751 u8 ht_cap_param_len;
3752 u8 *ht_extra_param;
3753 u8 ht_extra_param_len;
3754 };
3755
3756 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3757 {
3758 size_t left = len;
3759 u8 *pos = start;
3760 int unknown = 0;
3761
3762 memset(elems, 0, sizeof(*elems));
3763
3764 while (left >= 2) {
3765 u8 id, elen;
3766
3767 id = *pos++;
3768 elen = *pos++;
3769 left -= 2;
3770
3771 if (elen > left)
3772 return -1;
3773
3774 switch (id) {
3775 case WLAN_EID_DS_PARAMS:
3776 elems->ds_params = pos;
3777 elems->ds_params_len = elen;
3778 break;
3779 case WLAN_EID_TIM:
3780 elems->tim = pos;
3781 elems->tim_len = elen;
3782 break;
3783 case WLAN_EID_IBSS_PARAMS:
3784 elems->ibss_params = pos;
3785 elems->ibss_params_len = elen;
3786 break;
3787 case WLAN_EID_ERP_INFO:
3788 elems->erp_info = pos;
3789 elems->erp_info_len = elen;
3790 break;
3791 case WLAN_EID_HT_CAPABILITY:
3792 elems->ht_cap_param = pos;
3793 elems->ht_cap_param_len = elen;
3794 break;
3795 case WLAN_EID_HT_EXTRA_INFO:
3796 elems->ht_extra_param = pos;
3797 elems->ht_extra_param_len = elen;
3798 break;
3799 default:
3800 unknown++;
3801 break;
3802 }
3803
3804 left -= elen;
3805 pos += elen;
3806 }
3807
3808 return 0;
3809 }
3810
3811 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info, int mode)
3812 {
3813 ht_info->cap = 0;
3814 memset(ht_info->supp_mcs_set, 0, 16);
3815
3816 ht_info->ht_supported = 1;
3817
3818 if (mode == MODE_IEEE80211A) {
3819 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3820 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3821 ht_info->supp_mcs_set[4] = 0x01;
3822 }
3823 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3824 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3825 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3826 (IWL_MIMO_PS_NONE << 2));
3827 if (iwl4965_param_amsdu_size_8K) {
3828 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3829 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3830 }
3831
3832 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3833 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3834
3835 ht_info->supp_mcs_set[0] = 0xFF;
3836 ht_info->supp_mcs_set[1] = 0xFF;
3837 }
3838 #endif /* CONFIG_IWL4965_HT */
3839
3840 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3841 {
3842 unsigned long flags;
3843
3844 spin_lock_irqsave(&priv->sta_lock, flags);
3845 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3846 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3847 priv->stations[sta_id].sta.sta.modify_mask = 0;
3848 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3849 spin_unlock_irqrestore(&priv->sta_lock, flags);
3850
3851 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3852 }
3853
3854 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3855 {
3856 /* FIXME: need locking over ps_status ??? */
3857 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3858
3859 if (sta_id != IWL_INVALID_STATION) {
3860 u8 sta_awake = priv->stations[sta_id].
3861 ps_status == STA_PS_STATUS_WAKE;
3862
3863 if (sta_awake && ps_bit)
3864 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3865 else if (!sta_awake && !ps_bit) {
3866 iwl4965_sta_modify_ps_wake(priv, sta_id);
3867 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3868 }
3869 }
3870 }
3871
3872 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3873
3874 /* Called for REPLY_4965_RX (legacy ABG frames), or
3875 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3876 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3877 struct iwl4965_rx_mem_buffer *rxb)
3878 {
3879 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3880 /* Use phy data (Rx signal strength, etc.) contained within
3881 * this rx packet for legacy frames,
3882 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3883 int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3884 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3885 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3886 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3887 __le32 *rx_end;
3888 unsigned int len = 0;
3889 struct ieee80211_hdr *header;
3890 u16 fc;
3891 struct ieee80211_rx_status stats = {
3892 .mactime = le64_to_cpu(rx_start->timestamp),
3893 .channel = le16_to_cpu(rx_start->channel),
3894 .phymode =
3895 (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3896 MODE_IEEE80211G : MODE_IEEE80211A,
3897 .antenna = 0,
3898 .rate = iwl4965_hw_get_rate(rx_start->rate_n_flags),
3899 .flag = 0,
3900 };
3901 u8 network_packet;
3902
3903 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3904 IWL_DEBUG_DROP
3905 ("dsp size out of range [0,20]: "
3906 "%d/n", rx_start->cfg_phy_cnt);
3907 return;
3908 }
3909 if (!include_phy) {
3910 if (priv->last_phy_res[0])
3911 rx_start = (struct iwl4965_rx_phy_res *)
3912 &priv->last_phy_res[1];
3913 else
3914 rx_start = NULL;
3915 }
3916
3917 if (!rx_start) {
3918 IWL_ERROR("MPDU frame without a PHY data\n");
3919 return;
3920 }
3921
3922 if (include_phy) {
3923 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3924 + rx_start->cfg_phy_cnt);
3925
3926 len = le16_to_cpu(rx_start->byte_count);
3927 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3928 sizeof(struct iwl4965_rx_phy_res) + len);
3929 } else {
3930 struct iwl4965_rx_mpdu_res_start *amsdu =
3931 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3932
3933 header = (void *)(pkt->u.raw +
3934 sizeof(struct iwl4965_rx_mpdu_res_start));
3935 len = le16_to_cpu(amsdu->byte_count);
3936 rx_end = (__le32 *) (pkt->u.raw +
3937 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3938 }
3939
3940 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3941 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3942 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3943 le32_to_cpu(*rx_end));
3944 return;
3945 }
3946
3947 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3948
3949 stats.freq = ieee80211chan2mhz(stats.channel);
3950
3951 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3952 stats.ssi = iwl4965_calc_rssi(rx_start);
3953
3954 /* Meaningful noise values are available only from beacon statistics,
3955 * which are gathered only when associated, and indicate noise
3956 * only for the associated network channel ...
3957 * Ignore these noise values while scanning (other channels) */
3958 if (iwl4965_is_associated(priv) &&
3959 !test_bit(STATUS_SCANNING, &priv->status)) {
3960 stats.noise = priv->last_rx_noise;
3961 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
3962 } else {
3963 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3964 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
3965 }
3966
3967 /* Reset beacon noise level if not associated. */
3968 if (!iwl4965_is_associated(priv))
3969 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3970
3971 #ifdef CONFIG_IWL4965_DEBUG
3972 /* TODO: Parts of iwl4965_report_frame are broken for 4965 */
3973 if (iwl4965_debug_level & (IWL_DL_RX))
3974 /* Set "1" to report good data frames in groups of 100 */
3975 iwl4965_report_frame(priv, pkt, header, 1);
3976
3977 if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
3978 IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3979 stats.ssi, stats.noise, stats.signal,
3980 (long unsigned int)le64_to_cpu(rx_start->timestamp));
3981 #endif
3982
3983 network_packet = iwl4965_is_network_packet(priv, header);
3984 if (network_packet) {
3985 priv->last_rx_rssi = stats.ssi;
3986 priv->last_beacon_time = priv->ucode_beacon_time;
3987 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3988 }
3989
3990 fc = le16_to_cpu(header->frame_control);
3991 switch (fc & IEEE80211_FCTL_FTYPE) {
3992 case IEEE80211_FTYPE_MGMT:
3993
3994 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3995 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3996 header->addr2);
3997 switch (fc & IEEE80211_FCTL_STYPE) {
3998 case IEEE80211_STYPE_PROBE_RESP:
3999 case IEEE80211_STYPE_BEACON:
4000 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
4001 !compare_ether_addr(header->addr2, priv->bssid)) ||
4002 (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
4003 !compare_ether_addr(header->addr3, priv->bssid))) {
4004 struct ieee80211_mgmt *mgmt =
4005 (struct ieee80211_mgmt *)header;
4006 u64 timestamp =
4007 le64_to_cpu(mgmt->u.beacon.timestamp);
4008
4009 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4010 priv->timestamp1 =
4011 (timestamp >> 32) & 0xFFFFFFFF;
4012 priv->beacon_int = le16_to_cpu(
4013 mgmt->u.beacon.beacon_int);
4014 if (priv->call_post_assoc_from_beacon &&
4015 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4016 priv->call_post_assoc_from_beacon = 0;
4017 queue_work(priv->workqueue,
4018 &priv->post_associate.work);
4019 }
4020 }
4021 break;
4022
4023 case IEEE80211_STYPE_ACTION:
4024 break;
4025
4026 /*
4027 * TODO: Use the new callback function from
4028 * mac80211 instead of sniffing these packets.
4029 */
4030 case IEEE80211_STYPE_ASSOC_RESP:
4031 case IEEE80211_STYPE_REASSOC_RESP:
4032 if (network_packet) {
4033 #ifdef CONFIG_IWL4965_HT
4034 u8 *pos = NULL;
4035 struct ieee802_11_elems elems;
4036 #endif /*CONFIG_IWL4965_HT */
4037 struct ieee80211_mgmt *mgnt =
4038 (struct ieee80211_mgmt *)header;
4039
4040 /* We have just associated, give some
4041 * time for the 4-way handshake if
4042 * any. Don't start scan too early. */
4043 priv->next_scan_jiffies = jiffies +
4044 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4045
4046 priv->assoc_id = (~((1 << 15) | (1 << 14))
4047 & le16_to_cpu(mgnt->u.assoc_resp.aid));
4048 priv->assoc_capability =
4049 le16_to_cpu(
4050 mgnt->u.assoc_resp.capab_info);
4051 #ifdef CONFIG_IWL4965_HT
4052 pos = mgnt->u.assoc_resp.variable;
4053 if (!parse_elems(pos,
4054 len - (pos - (u8 *) mgnt),
4055 &elems)) {
4056 if (elems.ht_extra_param &&
4057 elems.ht_cap_param)
4058 break;
4059 }
4060 #endif /*CONFIG_IWL4965_HT */
4061 /* assoc_id is 0 no association */
4062 if (!priv->assoc_id)
4063 break;
4064 if (priv->beacon_int)
4065 queue_work(priv->workqueue,
4066 &priv->post_associate.work);
4067 else
4068 priv->call_post_assoc_from_beacon = 1;
4069 }
4070
4071 break;
4072
4073 case IEEE80211_STYPE_PROBE_REQ:
4074 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4075 !iwl4965_is_associated(priv)) {
4076 DECLARE_MAC_BUF(mac1);
4077 DECLARE_MAC_BUF(mac2);
4078 DECLARE_MAC_BUF(mac3);
4079
4080 IWL_DEBUG_DROP("Dropping (non network): "
4081 "%s, %s, %s\n",
4082 print_mac(mac1, header->addr1),
4083 print_mac(mac2, header->addr2),
4084 print_mac(mac3, header->addr3));
4085 return;
4086 }
4087 }
4088 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
4089 break;
4090
4091 case IEEE80211_FTYPE_CTL:
4092 #ifdef CONFIG_IWL4965_HT
4093 switch (fc & IEEE80211_FCTL_STYPE) {
4094 case IEEE80211_STYPE_BACK_REQ:
4095 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4096 iwl4965_handle_data_packet(priv, 0, include_phy,
4097 rxb, &stats);
4098 break;
4099 default:
4100 break;
4101 }
4102 #endif
4103 break;
4104
4105 case IEEE80211_FTYPE_DATA: {
4106 DECLARE_MAC_BUF(mac1);
4107 DECLARE_MAC_BUF(mac2);
4108 DECLARE_MAC_BUF(mac3);
4109
4110 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4111 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4112 header->addr2);
4113
4114 if (unlikely(!network_packet))
4115 IWL_DEBUG_DROP("Dropping (non network): "
4116 "%s, %s, %s\n",
4117 print_mac(mac1, header->addr1),
4118 print_mac(mac2, header->addr2),
4119 print_mac(mac3, header->addr3));
4120 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4121 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4122 print_mac(mac1, header->addr1),
4123 print_mac(mac2, header->addr2),
4124 print_mac(mac3, header->addr3));
4125 else
4126 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4127 &stats);
4128 break;
4129 }
4130 default:
4131 break;
4132
4133 }
4134 }
4135
4136 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4137 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4138 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4139 struct iwl4965_rx_mem_buffer *rxb)
4140 {
4141 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4142 priv->last_phy_res[0] = 1;
4143 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4144 sizeof(struct iwl4965_rx_phy_res));
4145 }
4146
4147 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4148 struct iwl4965_rx_mem_buffer *rxb)
4149
4150 {
4151 #ifdef CONFIG_IWL4965_SENSITIVITY
4152 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4153 struct iwl4965_missed_beacon_notif *missed_beacon;
4154
4155 missed_beacon = &pkt->u.missed_beacon;
4156 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4157 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4158 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4159 le32_to_cpu(missed_beacon->total_missed_becons),
4160 le32_to_cpu(missed_beacon->num_recvd_beacons),
4161 le32_to_cpu(missed_beacon->num_expected_beacons));
4162 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4163 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4164 queue_work(priv->workqueue, &priv->sensitivity_work);
4165 }
4166 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4167 }
4168
4169 #ifdef CONFIG_IWL4965_HT
4170 #ifdef CONFIG_IWL4965_HT_AGG
4171
4172 /**
4173 * iwl4965_set_tx_status - Update driver's record of one Tx frame's status
4174 *
4175 * This will get sent to mac80211.
4176 */
4177 static void iwl4965_set_tx_status(struct iwl4965_priv *priv, int txq_id, int idx,
4178 u32 status, u32 retry_count, u32 rate)
4179 {
4180 struct ieee80211_tx_status *tx_status =
4181 &(priv->txq[txq_id].txb[idx].status);
4182
4183 tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0;
4184 tx_status->retry_count += retry_count;
4185 tx_status->control.tx_rate = rate;
4186 }
4187
4188
4189 /**
4190 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4191 */
4192 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4193 int sta_id, int tid)
4194 {
4195 unsigned long flags;
4196
4197 /* Remove "disable" flag, to enable Tx for this TID */
4198 spin_lock_irqsave(&priv->sta_lock, flags);
4199 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4200 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4201 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4202 spin_unlock_irqrestore(&priv->sta_lock, flags);
4203
4204 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4205 }
4206
4207
4208 /**
4209 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4210 *
4211 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4212 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4213 */
4214 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4215 struct iwl4965_ht_agg *agg,
4216 struct iwl4965_compressed_ba_resp*
4217 ba_resp)
4218
4219 {
4220 int i, sh, ack;
4221 u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl);
4222 u32 bitmap0, bitmap1;
4223 u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0);
4224 u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1);
4225
4226 if (unlikely(!agg->wait_for_ba)) {
4227 IWL_ERROR("Received BA when not expected\n");
4228 return -EINVAL;
4229 }
4230
4231 /* Mark that the expected block-ack response arrived */
4232 agg->wait_for_ba = 0;
4233 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl);
4234
4235 /* Calculate shift to align block-ack bits with our Tx window bits */
4236 sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl >> 4);
4237 if (sh < 0) /* tbw something is wrong with indices */
4238 sh += 0x100;
4239
4240 /* don't use 64-bit values for now */
4241 bitmap0 = resp_bitmap0 >> sh;
4242 bitmap1 = resp_bitmap1 >> sh;
4243 bitmap0 |= (resp_bitmap1 & ((1 << sh) | ((1 << sh) - 1))) << (32 - sh);
4244
4245 if (agg->frame_count > (64 - sh)) {
4246 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4247 return -1;
4248 }
4249
4250 /* check for success or failure according to the
4251 * transmitted bitmap and block-ack bitmap */
4252 bitmap0 &= agg->bitmap0;
4253 bitmap1 &= agg->bitmap1;
4254
4255 /* For each frame attempted in aggregation,
4256 * update driver's record of tx frame's status. */
4257 for (i = 0; i < agg->frame_count ; i++) {
4258 int idx = (agg->start_idx + i) & 0xff;
4259 ack = bitmap0 & (1 << i);
4260 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4261 ack? "ACK":"NACK", i, idx, agg->start_idx + i);
4262 iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0,
4263 agg->rate_n_flags);
4264
4265 }
4266
4267 IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1);
4268
4269 return 0;
4270 }
4271
4272 /**
4273 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4274 * @index -- current index
4275 * @n_bd -- total number of entries in queue (s/b power of 2)
4276 */
4277 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4278 {
4279 return (index == 0) ? n_bd - 1 : index - 1;
4280 }
4281
4282 /**
4283 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4284 *
4285 * Handles block-acknowledge notification from device, which reports success
4286 * of frames sent via aggregation.
4287 */
4288 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4289 struct iwl4965_rx_mem_buffer *rxb)
4290 {
4291 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4292 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4293 int index;
4294 struct iwl4965_tx_queue *txq = NULL;
4295 struct iwl4965_ht_agg *agg;
4296
4297 /* "flow" corresponds to Tx queue */
4298 u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow);
4299
4300 /* "ssn" is start of block-ack Tx window, corresponds to index
4301 * (in Tx queue's circular buffer) of first TFD/frame in window */
4302 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4303
4304 if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) {
4305 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4306 return;
4307 }
4308
4309 txq = &priv->txq[ba_resp_scd_flow];
4310 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4311
4312 /* Find index just before block-ack window */
4313 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4314
4315 /* TODO: Need to get this copy more safely - now good for debug */
4316 /*
4317 {
4318 DECLARE_MAC_BUF(mac);
4319 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4320 "sta_id = %d\n",
4321 agg->wait_for_ba,
4322 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4323 ba_resp->sta_id);
4324 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
4325 "%d, scd_ssn = %d\n",
4326 ba_resp->tid,
4327 ba_resp->ba_seq_ctl,
4328 ba_resp->ba_bitmap1,
4329 ba_resp->ba_bitmap0,
4330 ba_resp->scd_flow,
4331 ba_resp->scd_ssn);
4332 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
4333 agg->start_idx,
4334 agg->bitmap1,
4335 agg->bitmap0);
4336 }
4337 */
4338
4339 /* Update driver's record of ACK vs. not for each frame in window */
4340 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4341
4342 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4343 * block-ack window (we assume that they've been successfully
4344 * transmitted ... if not, it's too late anyway). */
4345 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff))
4346 iwl4965_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
4347
4348 }
4349
4350
4351 /**
4352 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4353 */
4354 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv, u16 txq_id)
4355 {
4356 /* Simply stop the queue, but don't change any configuration;
4357 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4358 iwl4965_write_prph(priv,
4359 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4360 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4361 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4362 }
4363
4364 /**
4365 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4366 */
4367 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4368 u16 txq_id)
4369 {
4370 u32 tbl_dw_addr;
4371 u32 tbl_dw;
4372 u16 scd_q2ratid;
4373
4374 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4375
4376 tbl_dw_addr = priv->scd_base_addr +
4377 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4378
4379 tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4380
4381 if (txq_id & 0x1)
4382 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4383 else
4384 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4385
4386 iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4387
4388 return 0;
4389 }
4390
4391 /**
4392 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4393 *
4394 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4395 * i.e. it must be one of the higher queues used for aggregation
4396 */
4397 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4398 int tx_fifo, int sta_id, int tid,
4399 u16 ssn_idx)
4400 {
4401 unsigned long flags;
4402 int rc;
4403 u16 ra_tid;
4404
4405 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4406 IWL_WARNING("queue number too small: %d, must be > %d\n",
4407 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4408
4409 ra_tid = BUILD_RAxTID(sta_id, tid);
4410
4411 /* Modify device's station table to Tx this TID */
4412 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4413
4414 spin_lock_irqsave(&priv->lock, flags);
4415 rc = iwl4965_grab_nic_access(priv);
4416 if (rc) {
4417 spin_unlock_irqrestore(&priv->lock, flags);
4418 return rc;
4419 }
4420
4421 /* Stop this Tx queue before configuring it */
4422 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4423
4424 /* Map receiver-address / traffic-ID to this queue */
4425 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4426
4427 /* Set this queue as a chain-building queue */
4428 iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4429
4430 /* Place first TFD at index corresponding to start sequence number.
4431 * Assumes that ssn_idx is valid (!= 0xFFF) */
4432 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4433 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4434 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4435
4436 /* Set up Tx window size and frame limit for this queue */
4437 iwl4965_write_targ_mem(priv,
4438 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4439 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4440 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4441
4442 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4443 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4444 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4445 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4446
4447 iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4448
4449 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4450 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4451
4452 iwl4965_release_nic_access(priv);
4453 spin_unlock_irqrestore(&priv->lock, flags);
4454
4455 return 0;
4456 }
4457
4458 /**
4459 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4460 */
4461 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4462 u16 ssn_idx, u8 tx_fifo)
4463 {
4464 unsigned long flags;
4465 int rc;
4466
4467 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4468 IWL_WARNING("queue number too small: %d, must be > %d\n",
4469 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4470 return -EINVAL;
4471 }
4472
4473 spin_lock_irqsave(&priv->lock, flags);
4474 rc = iwl4965_grab_nic_access(priv);
4475 if (rc) {
4476 spin_unlock_irqrestore(&priv->lock, flags);
4477 return rc;
4478 }
4479
4480 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4481
4482 iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4483
4484 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4485 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4486 /* supposes that ssn_idx is valid (!= 0xFFF) */
4487 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4488
4489 iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4490 iwl4965_txq_ctx_deactivate(priv, txq_id);
4491 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4492
4493 iwl4965_release_nic_access(priv);
4494 spin_unlock_irqrestore(&priv->lock, flags);
4495
4496 return 0;
4497 }
4498
4499 #endif/* CONFIG_IWL4965_HT_AGG */
4500 #endif /* CONFIG_IWL4965_HT */
4501
4502 /**
4503 * iwl4965_add_station - Initialize a station's hardware rate table
4504 *
4505 * The uCode's station table contains a table of fallback rates
4506 * for automatic fallback during transmission.
4507 *
4508 * NOTE: This sets up a default set of values. These will be replaced later
4509 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4510 * rc80211_simple.
4511 *
4512 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4513 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4514 * which requires station table entry to exist).
4515 */
4516 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4517 {
4518 int i, r;
4519 struct iwl4965_link_quality_cmd link_cmd = {
4520 .reserved1 = 0,
4521 };
4522 u16 rate_flags;
4523
4524 /* Set up the rate scaling to start at selected rate, fall back
4525 * all the way down to 1M in IEEE order, and then spin on 1M */
4526 if (is_ap)
4527 r = IWL_RATE_54M_INDEX;
4528 else if (priv->phymode == MODE_IEEE80211A)
4529 r = IWL_RATE_6M_INDEX;
4530 else
4531 r = IWL_RATE_1M_INDEX;
4532
4533 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4534 rate_flags = 0;
4535 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4536 rate_flags |= RATE_MCS_CCK_MSK;
4537
4538 /* Use Tx antenna B only */
4539 rate_flags |= RATE_MCS_ANT_B_MSK;
4540 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4541
4542 link_cmd.rs_table[i].rate_n_flags =
4543 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4544 r = iwl4965_get_prev_ieee_rate(r);
4545 }
4546
4547 link_cmd.general_params.single_stream_ant_msk = 2;
4548 link_cmd.general_params.dual_stream_ant_msk = 3;
4549 link_cmd.agg_params.agg_dis_start_th = 3;
4550 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4551
4552 /* Update the rate scaling for control frame Tx to AP */
4553 link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4554
4555 iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4556 &link_cmd);
4557 }
4558
4559 #ifdef CONFIG_IWL4965_HT
4560
4561 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv, int phymode,
4562 u16 channel, u8 extension_chan_offset)
4563 {
4564 const struct iwl4965_channel_info *ch_info;
4565
4566 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
4567 if (!is_channel_valid(ch_info))
4568 return 0;
4569
4570 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4571 return 0;
4572
4573 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4574 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4575 return 1;
4576
4577 return 0;
4578 }
4579
4580 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4581 struct ieee80211_ht_info *sta_ht_inf)
4582 {
4583 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4584
4585 if ((!iwl_ht_conf->is_ht) ||
4586 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4587 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4588 return 0;
4589
4590 if (sta_ht_inf) {
4591 if ((!sta_ht_inf->ht_supported) ||
4592 (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
4593 return 0;
4594 }
4595
4596 return (iwl4965_is_channel_extension(priv, priv->phymode,
4597 iwl_ht_conf->control_channel,
4598 iwl_ht_conf->extension_chan_offset));
4599 }
4600
4601 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4602 {
4603 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4604 u32 val;
4605
4606 if (!ht_info->is_ht)
4607 return;
4608
4609 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4610 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4611 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4612 else
4613 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4614 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4615
4616 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4617 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4618 le16_to_cpu(rxon->channel),
4619 ht_info->control_channel);
4620 rxon->channel = cpu_to_le16(ht_info->control_channel);
4621 return;
4622 }
4623
4624 /* Note: control channel is opposite of extension channel */
4625 switch (ht_info->extension_chan_offset) {
4626 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4627 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4628 break;
4629 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4630 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4631 break;
4632 case IWL_EXT_CHANNEL_OFFSET_AUTO:
4633 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4634 break;
4635 default:
4636 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4637 break;
4638 }
4639
4640 val = ht_info->ht_protection;
4641
4642 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4643
4644 iwl4965_set_rxon_chain(priv);
4645
4646 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4647 "rxon flags 0x%X operation mode :0x%X "
4648 "extension channel offset 0x%x "
4649 "control chan %d\n",
4650 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4651 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4652 ht_info->extension_chan_offset,
4653 ht_info->control_channel);
4654 return;
4655 }
4656
4657 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4658 struct ieee80211_ht_info *sta_ht_inf)
4659 {
4660 __le32 sta_flags;
4661 u8 mimo_ps_mode;
4662
4663 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4664 goto done;
4665
4666 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4667
4668 sta_flags = priv->stations[index].sta.station_flags;
4669
4670 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4671
4672 switch (mimo_ps_mode) {
4673 case WLAN_HT_CAP_MIMO_PS_STATIC:
4674 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4675 break;
4676 case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4677 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4678 break;
4679 case WLAN_HT_CAP_MIMO_PS_DISABLED:
4680 break;
4681 default:
4682 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4683 break;
4684 }
4685
4686 sta_flags |= cpu_to_le32(
4687 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4688
4689 sta_flags |= cpu_to_le32(
4690 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4691
4692 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4693 sta_flags |= STA_FLG_FAT_EN_MSK;
4694 else
4695 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4696
4697 priv->stations[index].sta.station_flags = sta_flags;
4698 done:
4699 return;
4700 }
4701
4702 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4703 int sta_id, int tid, u16 ssn)
4704 {
4705 unsigned long flags;
4706
4707 spin_lock_irqsave(&priv->sta_lock, flags);
4708 priv->stations[sta_id].sta.station_flags_msk = 0;
4709 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4710 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4711 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4712 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4713 spin_unlock_irqrestore(&priv->sta_lock, flags);
4714
4715 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4716 }
4717
4718 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4719 int sta_id, int tid)
4720 {
4721 unsigned long flags;
4722
4723 spin_lock_irqsave(&priv->sta_lock, flags);
4724 priv->stations[sta_id].sta.station_flags_msk = 0;
4725 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4726 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4727 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4728 spin_unlock_irqrestore(&priv->sta_lock, flags);
4729
4730 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4731 }
4732
4733 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4734 enum ieee80211_ampdu_mlme_action action,
4735 const u8 *addr, u16 tid, u16 ssn)
4736 {
4737 struct iwl4965_priv *priv = hw->priv;
4738 int sta_id;
4739 DECLARE_MAC_BUF(mac);
4740
4741 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4742 print_mac(mac, addr), tid);
4743 sta_id = iwl4965_hw_find_station(priv, addr);
4744 switch (action) {
4745 case IEEE80211_AMPDU_RX_START:
4746 IWL_DEBUG_HT("start Rx\n");
4747 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, ssn);
4748 break;
4749 case IEEE80211_AMPDU_RX_STOP:
4750 IWL_DEBUG_HT("stop Rx\n");
4751 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4752 break;
4753 default:
4754 IWL_DEBUG_HT("unknown\n");
4755 return -EINVAL;
4756 break;
4757 }
4758 return 0;
4759 }
4760
4761 #ifdef CONFIG_IWL4965_HT_AGG
4762
4763 static const u16 default_tid_to_tx_fifo[] = {
4764 IWL_TX_FIFO_AC1,
4765 IWL_TX_FIFO_AC0,
4766 IWL_TX_FIFO_AC0,
4767 IWL_TX_FIFO_AC1,
4768 IWL_TX_FIFO_AC2,
4769 IWL_TX_FIFO_AC2,
4770 IWL_TX_FIFO_AC3,
4771 IWL_TX_FIFO_AC3,
4772 IWL_TX_FIFO_NONE,
4773 IWL_TX_FIFO_NONE,
4774 IWL_TX_FIFO_NONE,
4775 IWL_TX_FIFO_NONE,
4776 IWL_TX_FIFO_NONE,
4777 IWL_TX_FIFO_NONE,
4778 IWL_TX_FIFO_NONE,
4779 IWL_TX_FIFO_NONE,
4780 IWL_TX_FIFO_AC3
4781 };
4782
4783 /*
4784 * Find first available (lowest unused) Tx Queue, mark it "active".
4785 * Called only when finding queue for aggregation.
4786 * Should never return anything < 7, because they should already
4787 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4788 */
4789 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4790 {
4791 int txq_id;
4792
4793 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4794 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4795 return txq_id;
4796 return -1;
4797 }
4798
4799 int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid,
4800 u16 *start_seq_num)
4801 {
4802
4803 struct iwl4965_priv *priv = hw->priv;
4804 int sta_id;
4805 int tx_fifo;
4806 int txq_id;
4807 int ssn = -1;
4808 unsigned long flags;
4809 struct iwl4965_tid_data *tid_data;
4810 DECLARE_MAC_BUF(mac);
4811
4812 /* Determine Tx DMA/FIFO channel for this Traffic ID */
4813 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4814 tx_fifo = default_tid_to_tx_fifo[tid];
4815 else
4816 return -EINVAL;
4817
4818 IWL_WARNING("iwl-AGG iwl4965_mac_ht_tx_agg_start on da=%s"
4819 " tid=%d\n", print_mac(mac, da), tid);
4820
4821 /* Get index into station table */
4822 sta_id = iwl4965_hw_find_station(priv, da);
4823 if (sta_id == IWL_INVALID_STATION)
4824 return -ENXIO;
4825
4826 /* Find available Tx queue for aggregation */
4827 txq_id = iwl4965_txq_ctx_activate_free(priv);
4828 if (txq_id == -1)
4829 return -ENXIO;
4830
4831 spin_lock_irqsave(&priv->sta_lock, flags);
4832 tid_data = &priv->stations[sta_id].tid[tid];
4833
4834 /* Get starting sequence number for 1st frame in block ack window.
4835 * We'll use least signif byte as 1st frame's index into Tx queue. */
4836 ssn = SEQ_TO_SN(tid_data->seq_number);
4837 tid_data->agg.txq_id = txq_id;
4838 spin_unlock_irqrestore(&priv->sta_lock, flags);
4839
4840 *start_seq_num = ssn;
4841
4842 /* Update driver's link quality manager */
4843 iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE);
4844
4845 /* Set up and enable aggregation for selected Tx queue and FIFO */
4846 return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4847 sta_id, tid, ssn);
4848 }
4849
4850
4851 int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid,
4852 int generator)
4853 {
4854
4855 struct iwl4965_priv *priv = hw->priv;
4856 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4857 struct iwl4965_tid_data *tid_data;
4858 int rc;
4859 DECLARE_MAC_BUF(mac);
4860
4861 if (!da) {
4862 IWL_ERROR("%s: da = NULL\n", __func__);
4863 return -EINVAL;
4864 }
4865
4866 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4867 tx_fifo_id = default_tid_to_tx_fifo[tid];
4868 else
4869 return -EINVAL;
4870
4871 sta_id = iwl4965_hw_find_station(priv, da);
4872
4873 if (sta_id == IWL_INVALID_STATION)
4874 return -ENXIO;
4875
4876 tid_data = &priv->stations[sta_id].tid[tid];
4877 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4878 txq_id = tid_data->agg.txq_id;
4879
4880 rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4881 /* FIXME: need more safe way to handle error condition */
4882 if (rc)
4883 return rc;
4884
4885 iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA);
4886 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4887 print_mac(mac, da), tid);
4888
4889 return 0;
4890 }
4891
4892
4893 #endif /* CONFIG_IWL4965_HT_AGG */
4894 #endif /* CONFIG_IWL4965_HT */
4895
4896 /* Set up 4965-specific Rx frame reply handlers */
4897 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4898 {
4899 /* Legacy Rx frames */
4900 priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4901
4902 /* High-throughput (HT) Rx frames */
4903 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4904 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4905
4906 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4907 iwl4965_rx_missed_beacon_notif;
4908
4909 #ifdef CONFIG_IWL4965_HT
4910 #ifdef CONFIG_IWL4965_HT_AGG
4911 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4912 #endif /* CONFIG_IWL4965_HT_AGG */
4913 #endif /* CONFIG_IWL4965_HT */
4914 }
4915
4916 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4917 {
4918 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4919 INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4920 #ifdef CONFIG_IWL4965_SENSITIVITY
4921 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4922 #endif
4923 #ifdef CONFIG_IWL4965_HT
4924 #ifdef CONFIG_IWL4965_HT_AGG
4925 INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work);
4926 #endif /* CONFIG_IWL4965_HT_AGG */
4927 #endif /* CONFIG_IWL4965_HT */
4928 init_timer(&priv->statistics_periodic);
4929 priv->statistics_periodic.data = (unsigned long)priv;
4930 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4931 }
4932
4933 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4934 {
4935 del_timer_sync(&priv->statistics_periodic);
4936
4937 cancel_delayed_work(&priv->init_alive_start);
4938 }
4939
4940 struct pci_device_id iwl4965_hw_card_ids[] = {
4941 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4942 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4943 {0}
4944 };
4945
4946 /*
4947 * The device's EEPROM semaphore prevents conflicts between driver and uCode
4948 * when accessing the EEPROM; each access is a series of pulses to/from the
4949 * EEPROM chip, not a single event, so even reads could conflict if they
4950 * weren't arbitrated by the semaphore.
4951 */
4952 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4953 {
4954 u16 count;
4955 int rc;
4956
4957 for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4958 /* Request semaphore */
4959 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4960 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4961
4962 /* See if we got it */
4963 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4964 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4965 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4966 EEPROM_SEM_TIMEOUT);
4967 if (rc >= 0) {
4968 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4969 count+1);
4970 return rc;
4971 }
4972 }
4973
4974 return rc;
4975 }
4976
4977 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
WRT350N Kernel Patches