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iwlwifi: A-MPDU Rx flow enabled
[linux-2.6/linux-2.6-openrd.git] / drivers / net / wireless / iwlwifi / iwl-4965.c
blob89e2c44bfcca09782467c3a74c912997e5bf61ce
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 /* Read the EEPROM */
510 rc = iwl4965_eeprom_init(priv);
511 if (rc)
512 return rc;
513
514 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
515 IWL_ERROR("Older EEPROM detected! Aborting.\n");
516 return -EINVAL;
517 }
518
519 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
520
521 /* disable L1 entry -- workaround for pre-B1 */
522 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
523
524 spin_lock_irqsave(&priv->lock, flags);
525
526 /* set CSR_HW_CONFIG_REG for uCode use */
527
528 iwl4965_set_bit(priv, CSR_SW_VER, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R |
529 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
530 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
531
532 rc = iwl4965_grab_nic_access(priv);
533 if (rc < 0) {
534 spin_unlock_irqrestore(&priv->lock, flags);
535 IWL_DEBUG_INFO("Failed to init the card\n");
536 return rc;
537 }
538
539 iwl4965_read_prph(priv, APMG_PS_CTRL_REG);
540 iwl4965_set_bits_prph(priv, APMG_PS_CTRL_REG,
541 APMG_PS_CTRL_VAL_RESET_REQ);
542 udelay(5);
543 iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
544 APMG_PS_CTRL_VAL_RESET_REQ);
545
546 iwl4965_release_nic_access(priv);
547 spin_unlock_irqrestore(&priv->lock, flags);
548
549 iwl4965_hw_card_show_info(priv);
550
551 /* end nic_init */
552
553 /* Allocate the RX queue, or reset if it is already allocated */
554 if (!rxq->bd) {
555 rc = iwl4965_rx_queue_alloc(priv);
556 if (rc) {
557 IWL_ERROR("Unable to initialize Rx queue\n");
558 return -ENOMEM;
559 }
560 } else
561 iwl4965_rx_queue_reset(priv, rxq);
562
563 iwl4965_rx_replenish(priv);
564
565 iwl4965_rx_init(priv, rxq);
566
567 spin_lock_irqsave(&priv->lock, flags);
568
569 rxq->need_update = 1;
570 iwl4965_rx_queue_update_write_ptr(priv, rxq);
571
572 spin_unlock_irqrestore(&priv->lock, flags);
573
574 /* Allocate and init all Tx and Command queues */
575 rc = iwl4965_txq_ctx_reset(priv);
576 if (rc)
577 return rc;
578
579 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
580 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
581
582 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
583 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
584
585 set_bit(STATUS_INIT, &priv->status);
586
587 return 0;
588 }
589
590 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
591 {
592 int rc = 0;
593 u32 reg_val;
594 unsigned long flags;
595
596 spin_lock_irqsave(&priv->lock, flags);
597
598 /* set stop master bit */
599 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
600
601 reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
602
603 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
604 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
605 IWL_DEBUG_INFO("Card in power save, master is already "
606 "stopped\n");
607 else {
608 rc = iwl4965_poll_bit(priv, CSR_RESET,
609 CSR_RESET_REG_FLAG_MASTER_DISABLED,
610 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
611 if (rc < 0) {
612 spin_unlock_irqrestore(&priv->lock, flags);
613 return rc;
614 }
615 }
616
617 spin_unlock_irqrestore(&priv->lock, flags);
618 IWL_DEBUG_INFO("stop master\n");
619
620 return rc;
621 }
622
623 /**
624 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
625 */
626 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
627 {
628
629 int txq_id;
630 unsigned long flags;
631
632 /* Stop each Tx DMA channel, and wait for it to be idle */
633 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++) {
634 spin_lock_irqsave(&priv->lock, flags);
635 if (iwl4965_grab_nic_access(priv)) {
636 spin_unlock_irqrestore(&priv->lock, flags);
637 continue;
638 }
639
640 iwl4965_write_direct32(priv,
641 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
642 0x0);
643 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
644 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
645 (txq_id), 200);
646 iwl4965_release_nic_access(priv);
647 spin_unlock_irqrestore(&priv->lock, flags);
648 }
649
650 /* Deallocate memory for all Tx queues */
651 iwl4965_hw_txq_ctx_free(priv);
652 }
653
654 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
655 {
656 int rc = 0;
657 unsigned long flags;
658
659 iwl4965_hw_nic_stop_master(priv);
660
661 spin_lock_irqsave(&priv->lock, flags);
662
663 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
664
665 udelay(10);
666
667 iwl4965_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
668 rc = iwl4965_poll_bit(priv, CSR_RESET,
669 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
670 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
671
672 udelay(10);
673
674 rc = iwl4965_grab_nic_access(priv);
675 if (!rc) {
676 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
677 APMG_CLK_VAL_DMA_CLK_RQT |
678 APMG_CLK_VAL_BSM_CLK_RQT);
679
680 udelay(10);
681
682 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
683 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
684
685 iwl4965_release_nic_access(priv);
686 }
687
688 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
689 wake_up_interruptible(&priv->wait_command_queue);
690
691 spin_unlock_irqrestore(&priv->lock, flags);
692
693 return rc;
694
695 }
696
697 #define REG_RECALIB_PERIOD (60)
698
699 /**
700 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
701 *
702 * This callback is provided in order to queue the statistics_work
703 * in work_queue context (v. softirq)
704 *
705 * This timer function is continually reset to execute within
706 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
707 * was received. We need to ensure we receive the statistics in order
708 * to update the temperature used for calibrating the TXPOWER. However,
709 * we can't send the statistics command from softirq context (which
710 * is the context which timers run at) so we have to queue off the
711 * statistics_work to actually send the command to the hardware.
712 */
713 static void iwl4965_bg_statistics_periodic(unsigned long data)
714 {
715 struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
716
717 queue_work(priv->workqueue, &priv->statistics_work);
718 }
719
720 /**
721 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
722 *
723 * This is queued by iwl4965_bg_statistics_periodic.
724 */
725 static void iwl4965_bg_statistics_work(struct work_struct *work)
726 {
727 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
728 statistics_work);
729
730 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
731 return;
732
733 mutex_lock(&priv->mutex);
734 iwl4965_send_statistics_request(priv);
735 mutex_unlock(&priv->mutex);
736 }
737
738 #define CT_LIMIT_CONST 259
739 #define TM_CT_KILL_THRESHOLD 110
740
741 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
742 {
743 struct iwl4965_ct_kill_config cmd;
744 u32 R1, R2, R3;
745 u32 temp_th;
746 u32 crit_temperature;
747 unsigned long flags;
748 int rc = 0;
749
750 spin_lock_irqsave(&priv->lock, flags);
751 iwl4965_write32(priv, CSR_UCODE_DRV_GP1_CLR,
752 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
753 spin_unlock_irqrestore(&priv->lock, flags);
754
755 if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
756 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
757 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
758 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
759 } else {
760 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
761 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
762 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
763 }
764
765 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
766
767 crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
768 cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
769 rc = iwl4965_send_cmd_pdu(priv,
770 REPLY_CT_KILL_CONFIG_CMD, sizeof(cmd), &cmd);
771 if (rc)
772 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
773 else
774 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
775 }
776
777 #ifdef CONFIG_IWL4965_SENSITIVITY
778
779 /* "false alarms" are signals that our DSP tries to lock onto,
780 * but then determines that they are either noise, or transmissions
781 * from a distant wireless network (also "noise", really) that get
782 * "stepped on" by stronger transmissions within our own network.
783 * This algorithm attempts to set a sensitivity level that is high
784 * enough to receive all of our own network traffic, but not so
785 * high that our DSP gets too busy trying to lock onto non-network
786 * activity/noise. */
787 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
788 u32 norm_fa,
789 u32 rx_enable_time,
790 struct statistics_general_data *rx_info)
791 {
792 u32 max_nrg_cck = 0;
793 int i = 0;
794 u8 max_silence_rssi = 0;
795 u32 silence_ref = 0;
796 u8 silence_rssi_a = 0;
797 u8 silence_rssi_b = 0;
798 u8 silence_rssi_c = 0;
799 u32 val;
800
801 /* "false_alarms" values below are cross-multiplications to assess the
802 * numbers of false alarms within the measured period of actual Rx
803 * (Rx is off when we're txing), vs the min/max expected false alarms
804 * (some should be expected if rx is sensitive enough) in a
805 * hypothetical listening period of 200 time units (TU), 204.8 msec:
806 *
807 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
808 *
809 * */
810 u32 false_alarms = norm_fa * 200 * 1024;
811 u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
812 u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
813 struct iwl4965_sensitivity_data *data = NULL;
814
815 data = &(priv->sensitivity_data);
816
817 data->nrg_auto_corr_silence_diff = 0;
818
819 /* Find max silence rssi among all 3 receivers.
820 * This is background noise, which may include transmissions from other
821 * networks, measured during silence before our network's beacon */
822 silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
823 ALL_BAND_FILTER)>>8);
824 silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
825 ALL_BAND_FILTER)>>8);
826 silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
827 ALL_BAND_FILTER)>>8);
828
829 val = max(silence_rssi_b, silence_rssi_c);
830 max_silence_rssi = max(silence_rssi_a, (u8) val);
831
832 /* Store silence rssi in 20-beacon history table */
833 data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
834 data->nrg_silence_idx++;
835 if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
836 data->nrg_silence_idx = 0;
837
838 /* Find max silence rssi across 20 beacon history */
839 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
840 val = data->nrg_silence_rssi[i];
841 silence_ref = max(silence_ref, val);
842 }
843 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
844 silence_rssi_a, silence_rssi_b, silence_rssi_c,
845 silence_ref);
846
847 /* Find max rx energy (min value!) among all 3 receivers,
848 * measured during beacon frame.
849 * Save it in 10-beacon history table. */
850 i = data->nrg_energy_idx;
851 val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
852 data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
853
854 data->nrg_energy_idx++;
855 if (data->nrg_energy_idx >= 10)
856 data->nrg_energy_idx = 0;
857
858 /* Find min rx energy (max value) across 10 beacon history.
859 * This is the minimum signal level that we want to receive well.
860 * Add backoff (margin so we don't miss slightly lower energy frames).
861 * This establishes an upper bound (min value) for energy threshold. */
862 max_nrg_cck = data->nrg_value[0];
863 for (i = 1; i < 10; i++)
864 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
865 max_nrg_cck += 6;
866
867 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
868 rx_info->beacon_energy_a, rx_info->beacon_energy_b,
869 rx_info->beacon_energy_c, max_nrg_cck - 6);
870
871 /* Count number of consecutive beacons with fewer-than-desired
872 * false alarms. */
873 if (false_alarms < min_false_alarms)
874 data->num_in_cck_no_fa++;
875 else
876 data->num_in_cck_no_fa = 0;
877 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
878 data->num_in_cck_no_fa);
879
880 /* If we got too many false alarms this time, reduce sensitivity */
881 if (false_alarms > max_false_alarms) {
882 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
883 false_alarms, max_false_alarms);
884 IWL_DEBUG_CALIB("... reducing sensitivity\n");
885 data->nrg_curr_state = IWL_FA_TOO_MANY;
886
887 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
888 /* Store for "fewer than desired" on later beacon */
889 data->nrg_silence_ref = silence_ref;
890
891 /* increase energy threshold (reduce nrg value)
892 * to decrease sensitivity */
893 if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
894 data->nrg_th_cck = data->nrg_th_cck
895 - NRG_STEP_CCK;
896 }
897
898 /* increase auto_corr values to decrease sensitivity */
899 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
900 data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
901 else {
902 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
903 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
904 }
905 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
906 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
907
908 /* Else if we got fewer than desired, increase sensitivity */
909 } else if (false_alarms < min_false_alarms) {
910 data->nrg_curr_state = IWL_FA_TOO_FEW;
911
912 /* Compare silence level with silence level for most recent
913 * healthy number or too many false alarms */
914 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
915 (s32)silence_ref;
916
917 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
918 false_alarms, min_false_alarms,
919 data->nrg_auto_corr_silence_diff);
920
921 /* Increase value to increase sensitivity, but only if:
922 * 1a) previous beacon did *not* have *too many* false alarms
923 * 1b) AND there's a significant difference in Rx levels
924 * from a previous beacon with too many, or healthy # FAs
925 * OR 2) We've seen a lot of beacons (100) with too few
926 * false alarms */
927 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
928 ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
929 (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
930
931 IWL_DEBUG_CALIB("... increasing sensitivity\n");
932 /* Increase nrg value to increase sensitivity */
933 val = data->nrg_th_cck + NRG_STEP_CCK;
934 data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
935
936 /* Decrease auto_corr values to increase sensitivity */
937 val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
938 data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
939
940 val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
941 data->auto_corr_cck_mrc =
942 max((u32)AUTO_CORR_MIN_CCK_MRC, val);
943
944 } else
945 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
946
947 /* Else we got a healthy number of false alarms, keep status quo */
948 } else {
949 IWL_DEBUG_CALIB(" FA in safe zone\n");
950 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
951
952 /* Store for use in "fewer than desired" with later beacon */
953 data->nrg_silence_ref = silence_ref;
954
955 /* If previous beacon had too many false alarms,
956 * give it some extra margin by reducing sensitivity again
957 * (but don't go below measured energy of desired Rx) */
958 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
959 IWL_DEBUG_CALIB("... increasing margin\n");
960 data->nrg_th_cck -= NRG_MARGIN;
961 }
962 }
963
964 /* Make sure the energy threshold does not go above the measured
965 * energy of the desired Rx signals (reduced by backoff margin),
966 * or else we might start missing Rx frames.
967 * Lower value is higher energy, so we use max()!
968 */
969 data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
970 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
971
972 data->nrg_prev_state = data->nrg_curr_state;
973
974 return 0;
975 }
976
977
978 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
979 u32 norm_fa,
980 u32 rx_enable_time)
981 {
982 u32 val;
983 u32 false_alarms = norm_fa * 200 * 1024;
984 u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
985 u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
986 struct iwl4965_sensitivity_data *data = NULL;
987
988 data = &(priv->sensitivity_data);
989
990 /* If we got too many false alarms this time, reduce sensitivity */
991 if (false_alarms > max_false_alarms) {
992
993 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
994 false_alarms, max_false_alarms);
995
996 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
997 data->auto_corr_ofdm =
998 min((u32)AUTO_CORR_MAX_OFDM, val);
999
1000 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1001 data->auto_corr_ofdm_mrc =
1002 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1003
1004 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1005 data->auto_corr_ofdm_x1 =
1006 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1007
1008 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1009 data->auto_corr_ofdm_mrc_x1 =
1010 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1011 }
1012
1013 /* Else if we got fewer than desired, increase sensitivity */
1014 else if (false_alarms < min_false_alarms) {
1015
1016 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1017 false_alarms, min_false_alarms);
1018
1019 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1020 data->auto_corr_ofdm =
1021 max((u32)AUTO_CORR_MIN_OFDM, val);
1022
1023 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1024 data->auto_corr_ofdm_mrc =
1025 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1026
1027 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1028 data->auto_corr_ofdm_x1 =
1029 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1030
1031 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1032 data->auto_corr_ofdm_mrc_x1 =
1033 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1034 }
1035
1036 else
1037 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1038 min_false_alarms, false_alarms, max_false_alarms);
1039
1040 return 0;
1041 }
1042
1043 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1044 struct iwl4965_cmd *cmd, struct sk_buff *skb)
1045 {
1046 /* We didn't cache the SKB; let the caller free it */
1047 return 1;
1048 }
1049
1050 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1051 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
1052 {
1053 int rc = 0;
1054 struct iwl4965_sensitivity_cmd cmd ;
1055 struct iwl4965_sensitivity_data *data = NULL;
1056 struct iwl4965_host_cmd cmd_out = {
1057 .id = SENSITIVITY_CMD,
1058 .len = sizeof(struct iwl4965_sensitivity_cmd),
1059 .meta.flags = flags,
1060 .data = &cmd,
1061 };
1062
1063 data = &(priv->sensitivity_data);
1064
1065 memset(&cmd, 0, sizeof(cmd));
1066
1067 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1068 cpu_to_le16((u16)data->auto_corr_ofdm);
1069 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1070 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1071 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1072 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1073 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1074 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1075
1076 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1077 cpu_to_le16((u16)data->auto_corr_cck);
1078 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1079 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1080
1081 cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1082 cpu_to_le16((u16)data->nrg_th_cck);
1083 cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1084 cpu_to_le16((u16)data->nrg_th_ofdm);
1085
1086 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1087 __constant_cpu_to_le16(190);
1088 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1089 __constant_cpu_to_le16(390);
1090 cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1091 __constant_cpu_to_le16(62);
1092
1093 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1094 data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1095 data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1096 data->nrg_th_ofdm);
1097
1098 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1099 data->auto_corr_cck, data->auto_corr_cck_mrc,
1100 data->nrg_th_cck);
1101
1102 /* Update uCode's "work" table, and copy it to DSP */
1103 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1104
1105 if (flags & CMD_ASYNC)
1106 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1107
1108 /* Don't send command to uCode if nothing has changed */
1109 if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1110 sizeof(u16)*HD_TABLE_SIZE)) {
1111 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1112 return 0;
1113 }
1114
1115 /* Copy table for comparison next time */
1116 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1117 sizeof(u16)*HD_TABLE_SIZE);
1118
1119 rc = iwl4965_send_cmd(priv, &cmd_out);
1120 if (!rc) {
1121 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1122 return rc;
1123 }
1124
1125 return 0;
1126 }
1127
1128 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1129 {
1130 int rc = 0;
1131 int i;
1132 struct iwl4965_sensitivity_data *data = NULL;
1133
1134 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1135
1136 if (force)
1137 memset(&(priv->sensitivity_tbl[0]), 0,
1138 sizeof(u16)*HD_TABLE_SIZE);
1139
1140 /* Clear driver's sensitivity algo data */
1141 data = &(priv->sensitivity_data);
1142 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1143
1144 data->num_in_cck_no_fa = 0;
1145 data->nrg_curr_state = IWL_FA_TOO_MANY;
1146 data->nrg_prev_state = IWL_FA_TOO_MANY;
1147 data->nrg_silence_ref = 0;
1148 data->nrg_silence_idx = 0;
1149 data->nrg_energy_idx = 0;
1150
1151 for (i = 0; i < 10; i++)
1152 data->nrg_value[i] = 0;
1153
1154 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1155 data->nrg_silence_rssi[i] = 0;
1156
1157 data->auto_corr_ofdm = 90;
1158 data->auto_corr_ofdm_mrc = 170;
1159 data->auto_corr_ofdm_x1 = 105;
1160 data->auto_corr_ofdm_mrc_x1 = 220;
1161 data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1162 data->auto_corr_cck_mrc = 200;
1163 data->nrg_th_cck = 100;
1164 data->nrg_th_ofdm = 100;
1165
1166 data->last_bad_plcp_cnt_ofdm = 0;
1167 data->last_fa_cnt_ofdm = 0;
1168 data->last_bad_plcp_cnt_cck = 0;
1169 data->last_fa_cnt_cck = 0;
1170
1171 /* Clear prior Sensitivity command data to force send to uCode */
1172 if (force)
1173 memset(&(priv->sensitivity_tbl[0]), 0,
1174 sizeof(u16)*HD_TABLE_SIZE);
1175
1176 rc |= iwl4965_sensitivity_write(priv, flags);
1177 IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
1178
1179 return;
1180 }
1181
1182
1183 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1184 * Called after every association, but this runs only once!
1185 * ... once chain noise is calibrated the first time, it's good forever. */
1186 void iwl4965_chain_noise_reset(struct iwl4965_priv *priv)
1187 {
1188 struct iwl4965_chain_noise_data *data = NULL;
1189 int rc = 0;
1190
1191 data = &(priv->chain_noise_data);
1192 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1193 struct iwl4965_calibration_cmd cmd;
1194
1195 memset(&cmd, 0, sizeof(cmd));
1196 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1197 cmd.diff_gain_a = 0;
1198 cmd.diff_gain_b = 0;
1199 cmd.diff_gain_c = 0;
1200 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1201 sizeof(cmd), &cmd);
1202 msleep(4);
1203 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1204 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1205 }
1206 return;
1207 }
1208
1209 /*
1210 * Accumulate 20 beacons of signal and noise statistics for each of
1211 * 3 receivers/antennas/rx-chains, then figure out:
1212 * 1) Which antennas are connected.
1213 * 2) Differential rx gain settings to balance the 3 receivers.
1214 */
1215 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1216 struct iwl4965_notif_statistics *stat_resp)
1217 {
1218 struct iwl4965_chain_noise_data *data = NULL;
1219 int rc = 0;
1220
1221 u32 chain_noise_a;
1222 u32 chain_noise_b;
1223 u32 chain_noise_c;
1224 u32 chain_sig_a;
1225 u32 chain_sig_b;
1226 u32 chain_sig_c;
1227 u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1228 u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1229 u32 max_average_sig;
1230 u16 max_average_sig_antenna_i;
1231 u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1232 u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1233 u16 i = 0;
1234 u16 chan_num = INITIALIZATION_VALUE;
1235 u32 band = INITIALIZATION_VALUE;
1236 u32 active_chains = 0;
1237 unsigned long flags;
1238 struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1239
1240 data = &(priv->chain_noise_data);
1241
1242 /* Accumulate just the first 20 beacons after the first association,
1243 * then we're done forever. */
1244 if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1245 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1246 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1247 return;
1248 }
1249
1250 spin_lock_irqsave(&priv->lock, flags);
1251 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1252 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1253 spin_unlock_irqrestore(&priv->lock, flags);
1254 return;
1255 }
1256
1257 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1258 chan_num = le16_to_cpu(priv->staging_rxon.channel);
1259
1260 /* Make sure we accumulate data for just the associated channel
1261 * (even if scanning). */
1262 if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1263 ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1264 (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1265 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1266 chan_num, band);
1267 spin_unlock_irqrestore(&priv->lock, flags);
1268 return;
1269 }
1270
1271 /* Accumulate beacon statistics values across 20 beacons */
1272 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1273 IN_BAND_FILTER;
1274 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1275 IN_BAND_FILTER;
1276 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1277 IN_BAND_FILTER;
1278
1279 chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1280 chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1281 chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1282
1283 spin_unlock_irqrestore(&priv->lock, flags);
1284
1285 data->beacon_count++;
1286
1287 data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1288 data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1289 data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1290
1291 data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1292 data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1293 data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1294
1295 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1296 data->beacon_count);
1297 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1298 chain_sig_a, chain_sig_b, chain_sig_c);
1299 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1300 chain_noise_a, chain_noise_b, chain_noise_c);
1301
1302 /* If this is the 20th beacon, determine:
1303 * 1) Disconnected antennas (using signal strengths)
1304 * 2) Differential gain (using silence noise) to balance receivers */
1305 if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1306
1307 /* Analyze signal for disconnected antenna */
1308 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1309 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1310 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1311
1312 if (average_sig[0] >= average_sig[1]) {
1313 max_average_sig = average_sig[0];
1314 max_average_sig_antenna_i = 0;
1315 active_chains = (1 << max_average_sig_antenna_i);
1316 } else {
1317 max_average_sig = average_sig[1];
1318 max_average_sig_antenna_i = 1;
1319 active_chains = (1 << max_average_sig_antenna_i);
1320 }
1321
1322 if (average_sig[2] >= max_average_sig) {
1323 max_average_sig = average_sig[2];
1324 max_average_sig_antenna_i = 2;
1325 active_chains = (1 << max_average_sig_antenna_i);
1326 }
1327
1328 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1329 average_sig[0], average_sig[1], average_sig[2]);
1330 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1331 max_average_sig, max_average_sig_antenna_i);
1332
1333 /* Compare signal strengths for all 3 receivers. */
1334 for (i = 0; i < NUM_RX_CHAINS; i++) {
1335 if (i != max_average_sig_antenna_i) {
1336 s32 rssi_delta = (max_average_sig -
1337 average_sig[i]);
1338
1339 /* If signal is very weak, compared with
1340 * strongest, mark it as disconnected. */
1341 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1342 data->disconn_array[i] = 1;
1343 else
1344 active_chains |= (1 << i);
1345 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1346 "disconn_array[i] = %d\n",
1347 i, rssi_delta, data->disconn_array[i]);
1348 }
1349 }
1350
1351 /*If both chains A & B are disconnected -
1352 * connect B and leave A as is */
1353 if (data->disconn_array[CHAIN_A] &&
1354 data->disconn_array[CHAIN_B]) {
1355 data->disconn_array[CHAIN_B] = 0;
1356 active_chains |= (1 << CHAIN_B);
1357 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1358 "W/A - declare B as connected\n");
1359 }
1360
1361 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1362 active_chains);
1363
1364 /* Save for use within RXON, TX, SCAN commands, etc. */
1365 priv->valid_antenna = active_chains;
1366
1367 /* Analyze noise for rx balance */
1368 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1369 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1370 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1371
1372 for (i = 0; i < NUM_RX_CHAINS; i++) {
1373 if (!(data->disconn_array[i]) &&
1374 (average_noise[i] <= min_average_noise)) {
1375 /* This means that chain i is active and has
1376 * lower noise values so far: */
1377 min_average_noise = average_noise[i];
1378 min_average_noise_antenna_i = i;
1379 }
1380 }
1381
1382 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1383
1384 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1385 average_noise[0], average_noise[1],
1386 average_noise[2]);
1387
1388 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1389 min_average_noise, min_average_noise_antenna_i);
1390
1391 for (i = 0; i < NUM_RX_CHAINS; i++) {
1392 s32 delta_g = 0;
1393
1394 if (!(data->disconn_array[i]) &&
1395 (data->delta_gain_code[i] ==
1396 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1397 delta_g = average_noise[i] - min_average_noise;
1398 data->delta_gain_code[i] = (u8)((delta_g *
1399 10) / 15);
1400 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1401 data->delta_gain_code[i])
1402 data->delta_gain_code[i] =
1403 CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1404
1405 data->delta_gain_code[i] =
1406 (data->delta_gain_code[i] | (1 << 2));
1407 } else
1408 data->delta_gain_code[i] = 0;
1409 }
1410 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1411 data->delta_gain_code[0],
1412 data->delta_gain_code[1],
1413 data->delta_gain_code[2]);
1414
1415 /* Differential gain gets sent to uCode only once */
1416 if (!data->radio_write) {
1417 struct iwl4965_calibration_cmd cmd;
1418 data->radio_write = 1;
1419
1420 memset(&cmd, 0, sizeof(cmd));
1421 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1422 cmd.diff_gain_a = data->delta_gain_code[0];
1423 cmd.diff_gain_b = data->delta_gain_code[1];
1424 cmd.diff_gain_c = data->delta_gain_code[2];
1425 rc = iwl4965_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1426 sizeof(cmd), &cmd);
1427 if (rc)
1428 IWL_DEBUG_CALIB("fail sending cmd "
1429 "REPLY_PHY_CALIBRATION_CMD \n");
1430
1431 /* TODO we might want recalculate
1432 * rx_chain in rxon cmd */
1433
1434 /* Mark so we run this algo only once! */
1435 data->state = IWL_CHAIN_NOISE_CALIBRATED;
1436 }
1437 data->chain_noise_a = 0;
1438 data->chain_noise_b = 0;
1439 data->chain_noise_c = 0;
1440 data->chain_signal_a = 0;
1441 data->chain_signal_b = 0;
1442 data->chain_signal_c = 0;
1443 data->beacon_count = 0;
1444 }
1445 return;
1446 }
1447
1448 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1449 struct iwl4965_notif_statistics *resp)
1450 {
1451 int rc = 0;
1452 u32 rx_enable_time;
1453 u32 fa_cck;
1454 u32 fa_ofdm;
1455 u32 bad_plcp_cck;
1456 u32 bad_plcp_ofdm;
1457 u32 norm_fa_ofdm;
1458 u32 norm_fa_cck;
1459 struct iwl4965_sensitivity_data *data = NULL;
1460 struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1461 struct statistics_rx *statistics = &(resp->rx);
1462 unsigned long flags;
1463 struct statistics_general_data statis;
1464
1465 data = &(priv->sensitivity_data);
1466
1467 if (!iwl4965_is_associated(priv)) {
1468 IWL_DEBUG_CALIB("<< - not associated\n");
1469 return;
1470 }
1471
1472 spin_lock_irqsave(&priv->lock, flags);
1473 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1474 IWL_DEBUG_CALIB("<< invalid data.\n");
1475 spin_unlock_irqrestore(&priv->lock, flags);
1476 return;
1477 }
1478
1479 /* Extract Statistics: */
1480 rx_enable_time = le32_to_cpu(rx_info->channel_load);
1481 fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1482 fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1483 bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1484 bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1485
1486 statis.beacon_silence_rssi_a =
1487 le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1488 statis.beacon_silence_rssi_b =
1489 le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1490 statis.beacon_silence_rssi_c =
1491 le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1492 statis.beacon_energy_a =
1493 le32_to_cpu(statistics->general.beacon_energy_a);
1494 statis.beacon_energy_b =
1495 le32_to_cpu(statistics->general.beacon_energy_b);
1496 statis.beacon_energy_c =
1497 le32_to_cpu(statistics->general.beacon_energy_c);
1498
1499 spin_unlock_irqrestore(&priv->lock, flags);
1500
1501 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1502
1503 if (!rx_enable_time) {
1504 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1505 return;
1506 }
1507
1508 /* These statistics increase monotonically, and do not reset
1509 * at each beacon. Calculate difference from last value, or just
1510 * use the new statistics value if it has reset or wrapped around. */
1511 if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1512 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1513 else {
1514 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1515 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1516 }
1517
1518 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1519 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1520 else {
1521 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1522 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1523 }
1524
1525 if (data->last_fa_cnt_ofdm > fa_ofdm)
1526 data->last_fa_cnt_ofdm = fa_ofdm;
1527 else {
1528 fa_ofdm -= data->last_fa_cnt_ofdm;
1529 data->last_fa_cnt_ofdm += fa_ofdm;
1530 }
1531
1532 if (data->last_fa_cnt_cck > fa_cck)
1533 data->last_fa_cnt_cck = fa_cck;
1534 else {
1535 fa_cck -= data->last_fa_cnt_cck;
1536 data->last_fa_cnt_cck += fa_cck;
1537 }
1538
1539 /* Total aborted signal locks */
1540 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1541 norm_fa_cck = fa_cck + bad_plcp_cck;
1542
1543 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
1544 bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1545
1546 iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1547 iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1548 rc |= iwl4965_sensitivity_write(priv, CMD_ASYNC);
1549
1550 return;
1551 }
1552
1553 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1554 {
1555 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1556 sensitivity_work);
1557
1558 mutex_lock(&priv->mutex);
1559
1560 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1561 test_bit(STATUS_SCANNING, &priv->status)) {
1562 mutex_unlock(&priv->mutex);
1563 return;
1564 }
1565
1566 if (priv->start_calib) {
1567 iwl4965_noise_calibration(priv, &priv->statistics);
1568
1569 if (priv->sensitivity_data.state ==
1570 IWL_SENS_CALIB_NEED_REINIT) {
1571 iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1572 priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1573 } else
1574 iwl4965_sensitivity_calibration(priv,
1575 &priv->statistics);
1576 }
1577
1578 mutex_unlock(&priv->mutex);
1579 return;
1580 }
1581 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1582
1583 static void iwl4965_bg_txpower_work(struct work_struct *work)
1584 {
1585 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1586 txpower_work);
1587
1588 /* If a scan happened to start before we got here
1589 * then just return; the statistics notification will
1590 * kick off another scheduled work to compensate for
1591 * any temperature delta we missed here. */
1592 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1593 test_bit(STATUS_SCANNING, &priv->status))
1594 return;
1595
1596 mutex_lock(&priv->mutex);
1597
1598 /* Regardless of if we are assocaited, we must reconfigure the
1599 * TX power since frames can be sent on non-radar channels while
1600 * not associated */
1601 iwl4965_hw_reg_send_txpower(priv);
1602
1603 /* Update last_temperature to keep is_calib_needed from running
1604 * when it isn't needed... */
1605 priv->last_temperature = priv->temperature;
1606
1607 mutex_unlock(&priv->mutex);
1608 }
1609
1610 /*
1611 * Acquire priv->lock before calling this function !
1612 */
1613 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
1614 {
1615 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR,
1616 (index & 0xff) | (txq_id << 8));
1617 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(txq_id), index);
1618 }
1619
1620 /**
1621 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1622 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1623 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1624 *
1625 * NOTE: Acquire priv->lock before calling this function !
1626 */
1627 static void iwl4965_tx_queue_set_status(struct iwl4965_priv *priv,
1628 struct iwl4965_tx_queue *txq,
1629 int tx_fifo_id, int scd_retry)
1630 {
1631 int txq_id = txq->q.id;
1632
1633 /* Find out whether to activate Tx queue */
1634 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1635
1636 /* Set up and activate */
1637 iwl4965_write_prph(priv, KDR_SCD_QUEUE_STATUS_BITS(txq_id),
1638 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1639 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1640 (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1641 (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1642 SCD_QUEUE_STTS_REG_MSK);
1643
1644 txq->sched_retry = scd_retry;
1645
1646 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1647 active ? "Activate" : "Deactivate",
1648 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1649 }
1650
1651 static const u16 default_queue_to_tx_fifo[] = {
1652 IWL_TX_FIFO_AC3,
1653 IWL_TX_FIFO_AC2,
1654 IWL_TX_FIFO_AC1,
1655 IWL_TX_FIFO_AC0,
1656 IWL_CMD_FIFO_NUM,
1657 IWL_TX_FIFO_HCCA_1,
1658 IWL_TX_FIFO_HCCA_2
1659 };
1660
1661 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1662 {
1663 set_bit(txq_id, &priv->txq_ctx_active_msk);
1664 }
1665
1666 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1667 {
1668 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1669 }
1670
1671 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1672 {
1673 u32 a;
1674 int i = 0;
1675 unsigned long flags;
1676 int rc;
1677
1678 spin_lock_irqsave(&priv->lock, flags);
1679
1680 #ifdef CONFIG_IWL4965_SENSITIVITY
1681 memset(&(priv->sensitivity_data), 0,
1682 sizeof(struct iwl4965_sensitivity_data));
1683 memset(&(priv->chain_noise_data), 0,
1684 sizeof(struct iwl4965_chain_noise_data));
1685 for (i = 0; i < NUM_RX_CHAINS; i++)
1686 priv->chain_noise_data.delta_gain_code[i] =
1687 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1688 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1689 rc = iwl4965_grab_nic_access(priv);
1690 if (rc) {
1691 spin_unlock_irqrestore(&priv->lock, flags);
1692 return rc;
1693 }
1694
1695 /* Clear 4965's internal Tx Scheduler data base */
1696 priv->scd_base_addr = iwl4965_read_prph(priv, KDR_SCD_SRAM_BASE_ADDR);
1697 a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1698 for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1699 iwl4965_write_targ_mem(priv, a, 0);
1700 for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1701 iwl4965_write_targ_mem(priv, a, 0);
1702 for (; a < sizeof(u16) * priv->hw_setting.max_txq_num; a += 4)
1703 iwl4965_write_targ_mem(priv, a, 0);
1704
1705 /* Tel 4965 where to find Tx byte count tables */
1706 iwl4965_write_prph(priv, KDR_SCD_DRAM_BASE_ADDR,
1707 (priv->hw_setting.shared_phys +
1708 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1709
1710 /* Disable chain mode for all queues */
1711 iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1712
1713 /* Initialize each Tx queue (including the command queue) */
1714 for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
1715
1716 /* TFD circular buffer read/write indexes */
1717 iwl4965_write_prph(priv, KDR_SCD_QUEUE_RDPTR(i), 0);
1718 iwl4965_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1719
1720 /* Max Tx Window size for Scheduler-ACK mode */
1721 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1722 SCD_CONTEXT_QUEUE_OFFSET(i),
1723 (SCD_WIN_SIZE <<
1724 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1725 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1726
1727 /* Frame limit */
1728 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1729 SCD_CONTEXT_QUEUE_OFFSET(i) +
1730 sizeof(u32),
1731 (SCD_FRAME_LIMIT <<
1732 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1733 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1734
1735 }
1736 iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1737 (1 << priv->hw_setting.max_txq_num) - 1);
1738
1739 /* Activate all Tx DMA/FIFO channels */
1740 iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1741 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1742
1743 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
1744
1745 /* Map each Tx/cmd queue to its corresponding fifo */
1746 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1747 int ac = default_queue_to_tx_fifo[i];
1748 iwl4965_txq_ctx_activate(priv, i);
1749 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1750 }
1751
1752 iwl4965_release_nic_access(priv);
1753 spin_unlock_irqrestore(&priv->lock, flags);
1754
1755 return 0;
1756 }
1757
1758 /**
1759 * iwl4965_hw_set_hw_setting
1760 *
1761 * Called when initializing driver
1762 */
1763 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
1764 {
1765 /* Allocate area for Tx byte count tables and Rx queue status */
1766 priv->hw_setting.shared_virt =
1767 pci_alloc_consistent(priv->pci_dev,
1768 sizeof(struct iwl4965_shared),
1769 &priv->hw_setting.shared_phys);
1770
1771 if (!priv->hw_setting.shared_virt)
1772 return -1;
1773
1774 memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
1775
1776 priv->hw_setting.max_txq_num = iwl4965_param_queues_num;
1777 priv->hw_setting.ac_queue_count = AC_NUM;
1778 priv->hw_setting.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
1779 priv->hw_setting.max_rxq_size = RX_QUEUE_SIZE;
1780 priv->hw_setting.max_rxq_log = RX_QUEUE_SIZE_LOG;
1781 if (iwl4965_param_amsdu_size_8K)
1782 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1783 else
1784 priv->hw_setting.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1785 priv->hw_setting.max_pkt_size = priv->hw_setting.rx_buf_size - 256;
1786 priv->hw_setting.max_stations = IWL4965_STATION_COUNT;
1787 priv->hw_setting.bcast_sta_id = IWL4965_BROADCAST_ID;
1788 return 0;
1789 }
1790
1791 /**
1792 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1793 *
1794 * Destroy all TX DMA queues and structures
1795 */
1796 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
1797 {
1798 int txq_id;
1799
1800 /* Tx queues */
1801 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
1802 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
1803
1804 /* Keep-warm buffer */
1805 iwl4965_kw_free(priv);
1806 }
1807
1808 /**
1809 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1810 *
1811 * Does NOT advance any TFD circular buffer read/write indexes
1812 * Does NOT free the TFD itself (which is within circular buffer)
1813 */
1814 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
1815 {
1816 struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
1817 struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
1818 struct pci_dev *dev = priv->pci_dev;
1819 int i;
1820 int counter = 0;
1821 int index, is_odd;
1822
1823 /* Host command buffers stay mapped in memory, nothing to clean */
1824 if (txq->q.id == IWL_CMD_QUEUE_NUM)
1825 return 0;
1826
1827 /* Sanity check on number of chunks */
1828 counter = IWL_GET_BITS(*bd, num_tbs);
1829 if (counter > MAX_NUM_OF_TBS) {
1830 IWL_ERROR("Too many chunks: %i\n", counter);
1831 /* @todo issue fatal error, it is quite serious situation */
1832 return 0;
1833 }
1834
1835 /* Unmap chunks, if any.
1836 * TFD info for odd chunks is different format than for even chunks. */
1837 for (i = 0; i < counter; i++) {
1838 index = i / 2;
1839 is_odd = i & 0x1;
1840
1841 if (is_odd)
1842 pci_unmap_single(
1843 dev,
1844 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
1845 (IWL_GET_BITS(bd->pa[index],
1846 tb2_addr_hi20) << 16),
1847 IWL_GET_BITS(bd->pa[index], tb2_len),
1848 PCI_DMA_TODEVICE);
1849
1850 else if (i > 0)
1851 pci_unmap_single(dev,
1852 le32_to_cpu(bd->pa[index].tb1_addr),
1853 IWL_GET_BITS(bd->pa[index], tb1_len),
1854 PCI_DMA_TODEVICE);
1855
1856 /* Free SKB, if any, for this chunk */
1857 if (txq->txb[txq->q.read_ptr].skb[i]) {
1858 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
1859
1860 dev_kfree_skb(skb);
1861 txq->txb[txq->q.read_ptr].skb[i] = NULL;
1862 }
1863 }
1864 return 0;
1865 }
1866
1867 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1868 {
1869 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1870 return -EINVAL;
1871 }
1872
1873 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1874 {
1875 s32 sign = 1;
1876
1877 if (num < 0) {
1878 sign = -sign;
1879 num = -num;
1880 }
1881 if (denom < 0) {
1882 sign = -sign;
1883 denom = -denom;
1884 }
1885 *res = 1;
1886 *res = ((num * 2 + denom) / (denom * 2)) * sign;
1887
1888 return 1;
1889 }
1890
1891 /**
1892 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1893 *
1894 * Determines power supply voltage compensation for txpower calculations.
1895 * Returns number of 1/2-dB steps to subtract from gain table index,
1896 * to compensate for difference between power supply voltage during
1897 * factory measurements, vs. current power supply voltage.
1898 *
1899 * Voltage indication is higher for lower voltage.
1900 * Lower voltage requires more gain (lower gain table index).
1901 */
1902 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1903 s32 current_voltage)
1904 {
1905 s32 comp = 0;
1906
1907 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1908 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1909 return 0;
1910
1911 iwl4965_math_div_round(current_voltage - eeprom_voltage,
1912 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1913
1914 if (current_voltage > eeprom_voltage)
1915 comp *= 2;
1916 if ((comp < -2) || (comp > 2))
1917 comp = 0;
1918
1919 return comp;
1920 }
1921
1922 static const struct iwl4965_channel_info *
1923 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv, u8 phymode, u16 channel)
1924 {
1925 const struct iwl4965_channel_info *ch_info;
1926
1927 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
1928
1929 if (!is_channel_valid(ch_info))
1930 return NULL;
1931
1932 return ch_info;
1933 }
1934
1935 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1936 {
1937 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1938 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1939 return CALIB_CH_GROUP_5;
1940
1941 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1942 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1943 return CALIB_CH_GROUP_1;
1944
1945 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1946 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1947 return CALIB_CH_GROUP_2;
1948
1949 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1950 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1951 return CALIB_CH_GROUP_3;
1952
1953 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1954 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1955 return CALIB_CH_GROUP_4;
1956
1957 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1958 return -1;
1959 }
1960
1961 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1962 {
1963 s32 b = -1;
1964
1965 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1966 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1967 continue;
1968
1969 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1970 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1971 break;
1972 }
1973
1974 return b;
1975 }
1976
1977 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1978 {
1979 s32 val;
1980
1981 if (x2 == x1)
1982 return y1;
1983 else {
1984 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1985 return val + y2;
1986 }
1987 }
1988
1989 /**
1990 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1991 *
1992 * Interpolates factory measurements from the two sample channels within a
1993 * sub-band, to apply to channel of interest. Interpolation is proportional to
1994 * differences in channel frequencies, which is proportional to differences
1995 * in channel number.
1996 */
1997 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
1998 struct iwl4965_eeprom_calib_ch_info *chan_info)
1999 {
2000 s32 s = -1;
2001 u32 c;
2002 u32 m;
2003 const struct iwl4965_eeprom_calib_measure *m1;
2004 const struct iwl4965_eeprom_calib_measure *m2;
2005 struct iwl4965_eeprom_calib_measure *omeas;
2006 u32 ch_i1;
2007 u32 ch_i2;
2008
2009 s = iwl4965_get_sub_band(priv, channel);
2010 if (s >= EEPROM_TX_POWER_BANDS) {
2011 IWL_ERROR("Tx Power can not find channel %d ", channel);
2012 return -1;
2013 }
2014
2015 ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2016 ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2017 chan_info->ch_num = (u8) channel;
2018
2019 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2020 channel, s, ch_i1, ch_i2);
2021
2022 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2023 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2024 m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2025 measurements[c][m]);
2026 m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2027 measurements[c][m]);
2028 omeas = &(chan_info->measurements[c][m]);
2029
2030 omeas->actual_pow =
2031 (u8) iwl4965_interpolate_value(channel, ch_i1,
2032 m1->actual_pow,
2033 ch_i2,
2034 m2->actual_pow);
2035 omeas->gain_idx =
2036 (u8) iwl4965_interpolate_value(channel, ch_i1,
2037 m1->gain_idx, ch_i2,
2038 m2->gain_idx);
2039 omeas->temperature =
2040 (u8) iwl4965_interpolate_value(channel, ch_i1,
2041 m1->temperature,
2042 ch_i2,
2043 m2->temperature);
2044 omeas->pa_det =
2045 (s8) iwl4965_interpolate_value(channel, ch_i1,
2046 m1->pa_det, ch_i2,
2047 m2->pa_det);
2048
2049 IWL_DEBUG_TXPOWER
2050 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2051 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2052 IWL_DEBUG_TXPOWER
2053 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2054 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2055 IWL_DEBUG_TXPOWER
2056 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2057 m1->pa_det, m2->pa_det, omeas->pa_det);
2058 IWL_DEBUG_TXPOWER
2059 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2060 m1->temperature, m2->temperature,
2061 omeas->temperature);
2062 }
2063 }
2064
2065 return 0;
2066 }
2067
2068 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2069 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2070 static s32 back_off_table[] = {
2071 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2072 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2073 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2074 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2075 10 /* CCK */
2076 };
2077
2078 /* Thermal compensation values for txpower for various frequency ranges ...
2079 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2080 static struct iwl4965_txpower_comp_entry {
2081 s32 degrees_per_05db_a;
2082 s32 degrees_per_05db_a_denom;
2083 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2084 {9, 2}, /* group 0 5.2, ch 34-43 */
2085 {4, 1}, /* group 1 5.2, ch 44-70 */
2086 {4, 1}, /* group 2 5.2, ch 71-124 */
2087 {4, 1}, /* group 3 5.2, ch 125-200 */
2088 {3, 1} /* group 4 2.4, ch all */
2089 };
2090
2091 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2092 {
2093 if (!band) {
2094 if ((rate_power_index & 7) <= 4)
2095 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2096 }
2097 return MIN_TX_GAIN_INDEX;
2098 }
2099
2100 struct gain_entry {
2101 u8 dsp;
2102 u8 radio;
2103 };
2104
2105 static const struct gain_entry gain_table[2][108] = {
2106 /* 5.2GHz power gain index table */
2107 {
2108 {123, 0x3F}, /* highest txpower */
2109 {117, 0x3F},
2110 {110, 0x3F},
2111 {104, 0x3F},
2112 {98, 0x3F},
2113 {110, 0x3E},
2114 {104, 0x3E},
2115 {98, 0x3E},
2116 {110, 0x3D},
2117 {104, 0x3D},
2118 {98, 0x3D},
2119 {110, 0x3C},
2120 {104, 0x3C},
2121 {98, 0x3C},
2122 {110, 0x3B},
2123 {104, 0x3B},
2124 {98, 0x3B},
2125 {110, 0x3A},
2126 {104, 0x3A},
2127 {98, 0x3A},
2128 {110, 0x39},
2129 {104, 0x39},
2130 {98, 0x39},
2131 {110, 0x38},
2132 {104, 0x38},
2133 {98, 0x38},
2134 {110, 0x37},
2135 {104, 0x37},
2136 {98, 0x37},
2137 {110, 0x36},
2138 {104, 0x36},
2139 {98, 0x36},
2140 {110, 0x35},
2141 {104, 0x35},
2142 {98, 0x35},
2143 {110, 0x34},
2144 {104, 0x34},
2145 {98, 0x34},
2146 {110, 0x33},
2147 {104, 0x33},
2148 {98, 0x33},
2149 {110, 0x32},
2150 {104, 0x32},
2151 {98, 0x32},
2152 {110, 0x31},
2153 {104, 0x31},
2154 {98, 0x31},
2155 {110, 0x30},
2156 {104, 0x30},
2157 {98, 0x30},
2158 {110, 0x25},
2159 {104, 0x25},
2160 {98, 0x25},
2161 {110, 0x24},
2162 {104, 0x24},
2163 {98, 0x24},
2164 {110, 0x23},
2165 {104, 0x23},
2166 {98, 0x23},
2167 {110, 0x22},
2168 {104, 0x18},
2169 {98, 0x18},
2170 {110, 0x17},
2171 {104, 0x17},
2172 {98, 0x17},
2173 {110, 0x16},
2174 {104, 0x16},
2175 {98, 0x16},
2176 {110, 0x15},
2177 {104, 0x15},
2178 {98, 0x15},
2179 {110, 0x14},
2180 {104, 0x14},
2181 {98, 0x14},
2182 {110, 0x13},
2183 {104, 0x13},
2184 {98, 0x13},
2185 {110, 0x12},
2186 {104, 0x08},
2187 {98, 0x08},
2188 {110, 0x07},
2189 {104, 0x07},
2190 {98, 0x07},
2191 {110, 0x06},
2192 {104, 0x06},
2193 {98, 0x06},
2194 {110, 0x05},
2195 {104, 0x05},
2196 {98, 0x05},
2197 {110, 0x04},
2198 {104, 0x04},
2199 {98, 0x04},
2200 {110, 0x03},
2201 {104, 0x03},
2202 {98, 0x03},
2203 {110, 0x02},
2204 {104, 0x02},
2205 {98, 0x02},
2206 {110, 0x01},
2207 {104, 0x01},
2208 {98, 0x01},
2209 {110, 0x00},
2210 {104, 0x00},
2211 {98, 0x00},
2212 {93, 0x00},
2213 {88, 0x00},
2214 {83, 0x00},
2215 {78, 0x00},
2216 },
2217 /* 2.4GHz power gain index table */
2218 {
2219 {110, 0x3f}, /* highest txpower */
2220 {104, 0x3f},
2221 {98, 0x3f},
2222 {110, 0x3e},
2223 {104, 0x3e},
2224 {98, 0x3e},
2225 {110, 0x3d},
2226 {104, 0x3d},
2227 {98, 0x3d},
2228 {110, 0x3c},
2229 {104, 0x3c},
2230 {98, 0x3c},
2231 {110, 0x3b},
2232 {104, 0x3b},
2233 {98, 0x3b},
2234 {110, 0x3a},
2235 {104, 0x3a},
2236 {98, 0x3a},
2237 {110, 0x39},
2238 {104, 0x39},
2239 {98, 0x39},
2240 {110, 0x38},
2241 {104, 0x38},
2242 {98, 0x38},
2243 {110, 0x37},
2244 {104, 0x37},
2245 {98, 0x37},
2246 {110, 0x36},
2247 {104, 0x36},
2248 {98, 0x36},
2249 {110, 0x35},
2250 {104, 0x35},
2251 {98, 0x35},
2252 {110, 0x34},
2253 {104, 0x34},
2254 {98, 0x34},
2255 {110, 0x33},
2256 {104, 0x33},
2257 {98, 0x33},
2258 {110, 0x32},
2259 {104, 0x32},
2260 {98, 0x32},
2261 {110, 0x31},
2262 {104, 0x31},
2263 {98, 0x31},
2264 {110, 0x30},
2265 {104, 0x30},
2266 {98, 0x30},
2267 {110, 0x6},
2268 {104, 0x6},
2269 {98, 0x6},
2270 {110, 0x5},
2271 {104, 0x5},
2272 {98, 0x5},
2273 {110, 0x4},
2274 {104, 0x4},
2275 {98, 0x4},
2276 {110, 0x3},
2277 {104, 0x3},
2278 {98, 0x3},
2279 {110, 0x2},
2280 {104, 0x2},
2281 {98, 0x2},
2282 {110, 0x1},
2283 {104, 0x1},
2284 {98, 0x1},
2285 {110, 0x0},
2286 {104, 0x0},
2287 {98, 0x0},
2288 {97, 0},
2289 {96, 0},
2290 {95, 0},
2291 {94, 0},
2292 {93, 0},
2293 {92, 0},
2294 {91, 0},
2295 {90, 0},
2296 {89, 0},
2297 {88, 0},
2298 {87, 0},
2299 {86, 0},
2300 {85, 0},
2301 {84, 0},
2302 {83, 0},
2303 {82, 0},
2304 {81, 0},
2305 {80, 0},
2306 {79, 0},
2307 {78, 0},
2308 {77, 0},
2309 {76, 0},
2310 {75, 0},
2311 {74, 0},
2312 {73, 0},
2313 {72, 0},
2314 {71, 0},
2315 {70, 0},
2316 {69, 0},
2317 {68, 0},
2318 {67, 0},
2319 {66, 0},
2320 {65, 0},
2321 {64, 0},
2322 {63, 0},
2323 {62, 0},
2324 {61, 0},
2325 {60, 0},
2326 {59, 0},
2327 }
2328 };
2329
2330 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv *priv, u8 band, u16 channel,
2331 u8 is_fat, u8 ctrl_chan_high,
2332 struct iwl4965_tx_power_db *tx_power_tbl)
2333 {
2334 u8 saturation_power;
2335 s32 target_power;
2336 s32 user_target_power;
2337 s32 power_limit;
2338 s32 current_temp;
2339 s32 reg_limit;
2340 s32 current_regulatory;
2341 s32 txatten_grp = CALIB_CH_GROUP_MAX;
2342 int i;
2343 int c;
2344 const struct iwl4965_channel_info *ch_info = NULL;
2345 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2346 const struct iwl4965_eeprom_calib_measure *measurement;
2347 s16 voltage;
2348 s32 init_voltage;
2349 s32 voltage_compensation;
2350 s32 degrees_per_05db_num;
2351 s32 degrees_per_05db_denom;
2352 s32 factory_temp;
2353 s32 temperature_comp[2];
2354 s32 factory_gain_index[2];
2355 s32 factory_actual_pwr[2];
2356 s32 power_index;
2357
2358 /* Sanity check requested level (dBm) */
2359 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2360 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2361 priv->user_txpower_limit);
2362 return -EINVAL;
2363 }
2364 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2365 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2366 priv->user_txpower_limit);
2367 return -EINVAL;
2368 }
2369
2370 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2371 * are used for indexing into txpower table) */
2372 user_target_power = 2 * priv->user_txpower_limit;
2373
2374 /* Get current (RXON) channel, band, width */
2375 ch_info =
2376 iwl4965_get_channel_txpower_info(priv, priv->phymode, channel);
2377
2378 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2379 is_fat);
2380
2381 if (!ch_info)
2382 return -EINVAL;
2383
2384 /* get txatten group, used to select 1) thermal txpower adjustment
2385 * and 2) mimo txpower balance between Tx chains. */
2386 txatten_grp = iwl4965_get_tx_atten_grp(channel);
2387 if (txatten_grp < 0)
2388 return -EINVAL;
2389
2390 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2391 channel, txatten_grp);
2392
2393 if (is_fat) {
2394 if (ctrl_chan_high)
2395 channel -= 2;
2396 else
2397 channel += 2;
2398 }
2399
2400 /* hardware txpower limits ...
2401 * saturation (clipping distortion) txpowers are in half-dBm */
2402 if (band)
2403 saturation_power = priv->eeprom.calib_info.saturation_power24;
2404 else
2405 saturation_power = priv->eeprom.calib_info.saturation_power52;
2406
2407 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2408 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2409 if (band)
2410 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2411 else
2412 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2413 }
2414
2415 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2416 * max_power_avg values are in dBm, convert * 2 */
2417 if (is_fat)
2418 reg_limit = ch_info->fat_max_power_avg * 2;
2419 else
2420 reg_limit = ch_info->max_power_avg * 2;
2421
2422 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2423 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2424 if (band)
2425 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2426 else
2427 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2428 }
2429
2430 /* Interpolate txpower calibration values for this channel,
2431 * based on factory calibration tests on spaced channels. */
2432 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2433
2434 /* calculate tx gain adjustment based on power supply voltage */
2435 voltage = priv->eeprom.calib_info.voltage;
2436 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2437 voltage_compensation =
2438 iwl4965_get_voltage_compensation(voltage, init_voltage);
2439
2440 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2441 init_voltage,
2442 voltage, voltage_compensation);
2443
2444 /* get current temperature (Celsius) */
2445 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2446 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2447 current_temp = KELVIN_TO_CELSIUS(current_temp);
2448
2449 /* select thermal txpower adjustment params, based on channel group
2450 * (same frequency group used for mimo txatten adjustment) */
2451 degrees_per_05db_num =
2452 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2453 degrees_per_05db_denom =
2454 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2455
2456 /* get per-chain txpower values from factory measurements */
2457 for (c = 0; c < 2; c++) {
2458 measurement = &ch_eeprom_info.measurements[c][1];
2459
2460 /* txgain adjustment (in half-dB steps) based on difference
2461 * between factory and current temperature */
2462 factory_temp = measurement->temperature;
2463 iwl4965_math_div_round((current_temp - factory_temp) *
2464 degrees_per_05db_denom,
2465 degrees_per_05db_num,
2466 &temperature_comp[c]);
2467
2468 factory_gain_index[c] = measurement->gain_idx;
2469 factory_actual_pwr[c] = measurement->actual_pow;
2470
2471 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2472 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2473 "curr tmp %d, comp %d steps\n",
2474 factory_temp, current_temp,
2475 temperature_comp[c]);
2476
2477 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2478 factory_gain_index[c],
2479 factory_actual_pwr[c]);
2480 }
2481
2482 /* for each of 33 bit-rates (including 1 for CCK) */
2483 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2484 u8 is_mimo_rate;
2485 union iwl4965_tx_power_dual_stream tx_power;
2486
2487 /* for mimo, reduce each chain's txpower by half
2488 * (3dB, 6 steps), so total output power is regulatory
2489 * compliant. */
2490 if (i & 0x8) {
2491 current_regulatory = reg_limit -
2492 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2493 is_mimo_rate = 1;
2494 } else {
2495 current_regulatory = reg_limit;
2496 is_mimo_rate = 0;
2497 }
2498
2499 /* find txpower limit, either hardware or regulatory */
2500 power_limit = saturation_power - back_off_table[i];
2501 if (power_limit > current_regulatory)
2502 power_limit = current_regulatory;
2503
2504 /* reduce user's txpower request if necessary
2505 * for this rate on this channel */
2506 target_power = user_target_power;
2507 if (target_power > power_limit)
2508 target_power = power_limit;
2509
2510 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2511 i, saturation_power - back_off_table[i],
2512 current_regulatory, user_target_power,
2513 target_power);
2514
2515 /* for each of 2 Tx chains (radio transmitters) */
2516 for (c = 0; c < 2; c++) {
2517 s32 atten_value;
2518
2519 if (is_mimo_rate)
2520 atten_value =
2521 (s32)le32_to_cpu(priv->card_alive_init.
2522 tx_atten[txatten_grp][c]);
2523 else
2524 atten_value = 0;
2525
2526 /* calculate index; higher index means lower txpower */
2527 power_index = (u8) (factory_gain_index[c] -
2528 (target_power -
2529 factory_actual_pwr[c]) -
2530 temperature_comp[c] -
2531 voltage_compensation +
2532 atten_value);
2533
2534 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2535 power_index); */
2536
2537 if (power_index < get_min_power_index(i, band))
2538 power_index = get_min_power_index(i, band);
2539
2540 /* adjust 5 GHz index to support negative indexes */
2541 if (!band)
2542 power_index += 9;
2543
2544 /* CCK, rate 32, reduce txpower for CCK */
2545 if (i == POWER_TABLE_CCK_ENTRY)
2546 power_index +=
2547 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2548
2549 /* stay within the table! */
2550 if (power_index > 107) {
2551 IWL_WARNING("txpower index %d > 107\n",
2552 power_index);
2553 power_index = 107;
2554 }
2555 if (power_index < 0) {
2556 IWL_WARNING("txpower index %d < 0\n",
2557 power_index);
2558 power_index = 0;
2559 }
2560
2561 /* fill txpower command for this rate/chain */
2562 tx_power.s.radio_tx_gain[c] =
2563 gain_table[band][power_index].radio;
2564 tx_power.s.dsp_predis_atten[c] =
2565 gain_table[band][power_index].dsp;
2566
2567 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2568 "gain 0x%02x dsp %d\n",
2569 c, atten_value, power_index,
2570 tx_power.s.radio_tx_gain[c],
2571 tx_power.s.dsp_predis_atten[c]);
2572 }/* for each chain */
2573
2574 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2575
2576 }/* for each rate */
2577
2578 return 0;
2579 }
2580
2581 /**
2582 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2583 *
2584 * Uses the active RXON for channel, band, and characteristics (fat, high)
2585 * The power limit is taken from priv->user_txpower_limit.
2586 */
2587 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2588 {
2589 struct iwl4965_txpowertable_cmd cmd = { 0 };
2590 int rc = 0;
2591 u8 band = 0;
2592 u8 is_fat = 0;
2593 u8 ctrl_chan_high = 0;
2594
2595 if (test_bit(STATUS_SCANNING, &priv->status)) {
2596 /* If this gets hit a lot, switch it to a BUG() and catch
2597 * the stack trace to find out who is calling this during
2598 * a scan. */
2599 IWL_WARNING("TX Power requested while scanning!\n");
2600 return -EAGAIN;
2601 }
2602
2603 band = ((priv->phymode == MODE_IEEE80211B) ||
2604 (priv->phymode == MODE_IEEE80211G));
2605
2606 is_fat = is_fat_channel(priv->active_rxon.flags);
2607
2608 if (is_fat &&
2609 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2610 ctrl_chan_high = 1;
2611
2612 cmd.band = band;
2613 cmd.channel = priv->active_rxon.channel;
2614
2615 rc = iwl4965_fill_txpower_tbl(priv, band,
2616 le16_to_cpu(priv->active_rxon.channel),
2617 is_fat, ctrl_chan_high, &cmd.tx_power);
2618 if (rc)
2619 return rc;
2620
2621 rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2622 return rc;
2623 }
2624
2625 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2626 {
2627 int rc;
2628 u8 band = 0;
2629 u8 is_fat = 0;
2630 u8 ctrl_chan_high = 0;
2631 struct iwl4965_channel_switch_cmd cmd = { 0 };
2632 const struct iwl4965_channel_info *ch_info;
2633
2634 band = ((priv->phymode == MODE_IEEE80211B) ||
2635 (priv->phymode == MODE_IEEE80211G));
2636
2637 ch_info = iwl4965_get_channel_info(priv, priv->phymode, channel);
2638
2639 is_fat = is_fat_channel(priv->staging_rxon.flags);
2640
2641 if (is_fat &&
2642 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2643 ctrl_chan_high = 1;
2644
2645 cmd.band = band;
2646 cmd.expect_beacon = 0;
2647 cmd.channel = cpu_to_le16(channel);
2648 cmd.rxon_flags = priv->active_rxon.flags;
2649 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2650 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2651 if (ch_info)
2652 cmd.expect_beacon = is_channel_radar(ch_info);
2653 else
2654 cmd.expect_beacon = 1;
2655
2656 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2657 ctrl_chan_high, &cmd.tx_power);
2658 if (rc) {
2659 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2660 return rc;
2661 }
2662
2663 rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2664 return rc;
2665 }
2666
2667 #define RTS_HCCA_RETRY_LIMIT 3
2668 #define RTS_DFAULT_RETRY_LIMIT 60
2669
2670 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv *priv,
2671 struct iwl4965_cmd *cmd,
2672 struct ieee80211_tx_control *ctrl,
2673 struct ieee80211_hdr *hdr, int sta_id,
2674 int is_hcca)
2675 {
2676 u8 rate;
2677 u8 rts_retry_limit = 0;
2678 u8 data_retry_limit = 0;
2679 __le32 tx_flags;
2680 u16 fc = le16_to_cpu(hdr->frame_control);
2681
2682 tx_flags = cmd->cmd.tx.tx_flags;
2683
2684 rate = iwl4965_rates[ctrl->tx_rate].plcp;
2685
2686 rts_retry_limit = (is_hcca) ?
2687 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2688
2689 if (ieee80211_is_probe_response(fc)) {
2690 data_retry_limit = 3;
2691 if (data_retry_limit < rts_retry_limit)
2692 rts_retry_limit = data_retry_limit;
2693 } else
2694 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2695
2696 if (priv->data_retry_limit != -1)
2697 data_retry_limit = priv->data_retry_limit;
2698
2699 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2700 switch (fc & IEEE80211_FCTL_STYPE) {
2701 case IEEE80211_STYPE_AUTH:
2702 case IEEE80211_STYPE_DEAUTH:
2703 case IEEE80211_STYPE_ASSOC_REQ:
2704 case IEEE80211_STYPE_REASSOC_REQ:
2705 if (tx_flags & TX_CMD_FLG_RTS_MSK) {
2706 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2707 tx_flags |= TX_CMD_FLG_CTS_MSK;
2708 }
2709 break;
2710 default:
2711 break;
2712 }
2713 }
2714
2715 cmd->cmd.tx.rts_retry_limit = rts_retry_limit;
2716 cmd->cmd.tx.data_retry_limit = data_retry_limit;
2717 cmd->cmd.tx.rate_n_flags = iwl4965_hw_set_rate_n_flags(rate, 0);
2718 cmd->cmd.tx.tx_flags = tx_flags;
2719 }
2720
2721 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2722 {
2723 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2724
2725 return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2726 }
2727
2728 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2729 {
2730 return priv->temperature;
2731 }
2732
2733 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2734 struct iwl4965_frame *frame, u8 rate)
2735 {
2736 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2737 unsigned int frame_size;
2738
2739 tx_beacon_cmd = &frame->u.beacon;
2740 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2741
2742 tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2743 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2744
2745 frame_size = iwl4965_fill_beacon_frame(priv,
2746 tx_beacon_cmd->frame,
2747 iwl4965_broadcast_addr,
2748 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2749
2750 BUG_ON(frame_size > MAX_MPDU_SIZE);
2751 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2752
2753 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2754 tx_beacon_cmd->tx.rate_n_flags =
2755 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2756 else
2757 tx_beacon_cmd->tx.rate_n_flags =
2758 iwl4965_hw_set_rate_n_flags(rate, 0);
2759
2760 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2761 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2762 return (sizeof(*tx_beacon_cmd) + frame_size);
2763 }
2764
2765 /*
2766 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2767 * given Tx queue, and enable the DMA channel used for that queue.
2768 *
2769 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2770 * channels supported in hardware.
2771 */
2772 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2773 {
2774 int rc;
2775 unsigned long flags;
2776 int txq_id = txq->q.id;
2777
2778 spin_lock_irqsave(&priv->lock, flags);
2779 rc = iwl4965_grab_nic_access(priv);
2780 if (rc) {
2781 spin_unlock_irqrestore(&priv->lock, flags);
2782 return rc;
2783 }
2784
2785 /* Circular buffer (TFD queue in DRAM) physical base address */
2786 iwl4965_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
2787 txq->q.dma_addr >> 8);
2788
2789 /* Enable DMA channel, using same id as for TFD queue */
2790 iwl4965_write_direct32(
2791 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
2792 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
2793 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
2794 iwl4965_release_nic_access(priv);
2795 spin_unlock_irqrestore(&priv->lock, flags);
2796
2797 return 0;
2798 }
2799
2800 static inline u8 iwl4965_get_dma_hi_address(dma_addr_t addr)
2801 {
2802 return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0;
2803 }
2804
2805 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2806 dma_addr_t addr, u16 len)
2807 {
2808 int index, is_odd;
2809 struct iwl4965_tfd_frame *tfd = ptr;
2810 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2811
2812 /* Each TFD can point to a maximum 20 Tx buffers */
2813 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2814 IWL_ERROR("Error can not send more than %d chunks\n",
2815 MAX_NUM_OF_TBS);
2816 return -EINVAL;
2817 }
2818
2819 index = num_tbs / 2;
2820 is_odd = num_tbs & 0x1;
2821
2822 if (!is_odd) {
2823 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2824 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2825 iwl4965_get_dma_hi_address(addr));
2826 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2827 } else {
2828 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2829 (u32) (addr & 0xffff));
2830 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2831 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2832 }
2833
2834 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2835
2836 return 0;
2837 }
2838
2839 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2840 {
2841 u16 hw_version = priv->eeprom.board_revision_4965;
2842
2843 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2844 ((hw_version >> 8) & 0x0F),
2845 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2846
2847 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2848 priv->eeprom.board_pba_number_4965);
2849 }
2850
2851 #define IWL_TX_CRC_SIZE 4
2852 #define IWL_TX_DELIMITER_SIZE 4
2853
2854 /**
2855 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2856 */
2857 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2858 struct iwl4965_tx_queue *txq, u16 byte_cnt)
2859 {
2860 int len;
2861 int txq_id = txq->q.id;
2862 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2863
2864 if (txq->need_update == 0)
2865 return 0;
2866
2867 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2868
2869 /* Set up byte count within first 256 entries */
2870 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2871 tfd_offset[txq->q.write_ptr], byte_cnt, len);
2872
2873 /* If within first 64 entries, duplicate at end */
2874 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2875 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2876 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2877 byte_cnt, len);
2878
2879 return 0;
2880 }
2881
2882 /**
2883 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2884 *
2885 * Selects how many and which Rx receivers/antennas/chains to use.
2886 * This should not be used for scan command ... it puts data in wrong place.
2887 */
2888 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2889 {
2890 u8 is_single = is_single_stream(priv);
2891 u8 idle_state, rx_state;
2892
2893 priv->staging_rxon.rx_chain = 0;
2894 rx_state = idle_state = 3;
2895
2896 /* Tell uCode which antennas are actually connected.
2897 * Before first association, we assume all antennas are connected.
2898 * Just after first association, iwl4965_noise_calibration()
2899 * checks which antennas actually *are* connected. */
2900 priv->staging_rxon.rx_chain |=
2901 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2902
2903 /* How many receivers should we use? */
2904 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2905 priv->staging_rxon.rx_chain |=
2906 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2907 priv->staging_rxon.rx_chain |=
2908 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2909
2910 if (!is_single && (rx_state >= 2) &&
2911 !test_bit(STATUS_POWER_PMI, &priv->status))
2912 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2913 else
2914 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2915
2916 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2917 }
2918
2919 #ifdef CONFIG_IWL4965_HT
2920 #ifdef CONFIG_IWL4965_HT_AGG
2921 /*
2922 get the traffic load value for tid
2923 */
2924 static u32 iwl4965_tl_get_load(struct iwl4965_priv *priv, u8 tid)
2925 {
2926 u32 load = 0;
2927 u32 current_time = jiffies_to_msecs(jiffies);
2928 u32 time_diff;
2929 s32 index;
2930 unsigned long flags;
2931 struct iwl4965_traffic_load *tid_ptr = NULL;
2932
2933 if (tid >= TID_MAX_LOAD_COUNT)
2934 return 0;
2935
2936 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2937
2938 current_time -= current_time % TID_ROUND_VALUE;
2939
2940 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2941 if (!(tid_ptr->queue_count))
2942 goto out;
2943
2944 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2945 index = time_diff / TID_QUEUE_CELL_SPACING;
2946
2947 if (index >= TID_QUEUE_MAX_SIZE) {
2948 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2949
2950 while (tid_ptr->queue_count &&
2951 (tid_ptr->time_stamp < oldest_time)) {
2952 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2953 tid_ptr->packet_count[tid_ptr->head] = 0;
2954 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2955 tid_ptr->queue_count--;
2956 tid_ptr->head++;
2957 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2958 tid_ptr->head = 0;
2959 }
2960 }
2961 load = tid_ptr->total;
2962
2963 out:
2964 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2965 return load;
2966 }
2967
2968 /*
2969 increment traffic load value for tid and also remove
2970 any old values if passed the certian time period
2971 */
2972 static void iwl4965_tl_add_packet(struct iwl4965_priv *priv, u8 tid)
2973 {
2974 u32 current_time = jiffies_to_msecs(jiffies);
2975 u32 time_diff;
2976 s32 index;
2977 unsigned long flags;
2978 struct iwl4965_traffic_load *tid_ptr = NULL;
2979
2980 if (tid >= TID_MAX_LOAD_COUNT)
2981 return;
2982
2983 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2984
2985 current_time -= current_time % TID_ROUND_VALUE;
2986
2987 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2988 if (!(tid_ptr->queue_count)) {
2989 tid_ptr->total = 1;
2990 tid_ptr->time_stamp = current_time;
2991 tid_ptr->queue_count = 1;
2992 tid_ptr->head = 0;
2993 tid_ptr->packet_count[0] = 1;
2994 goto out;
2995 }
2996
2997 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2998 index = time_diff / TID_QUEUE_CELL_SPACING;
2999
3000 if (index >= TID_QUEUE_MAX_SIZE) {
3001 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
3002
3003 while (tid_ptr->queue_count &&
3004 (tid_ptr->time_stamp < oldest_time)) {
3005 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
3006 tid_ptr->packet_count[tid_ptr->head] = 0;
3007 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
3008 tid_ptr->queue_count--;
3009 tid_ptr->head++;
3010 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
3011 tid_ptr->head = 0;
3012 }
3013 }
3014
3015 index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE;
3016 tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1;
3017 tid_ptr->total = tid_ptr->total + 1;
3018
3019 if ((index + 1) > tid_ptr->queue_count)
3020 tid_ptr->queue_count = index + 1;
3021 out:
3022 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3023
3024 }
3025
3026 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7
3027 enum HT_STATUS {
3028 BA_STATUS_FAILURE = 0,
3029 BA_STATUS_INITIATOR_DELBA,
3030 BA_STATUS_RECIPIENT_DELBA,
3031 BA_STATUS_RENEW_ADDBA_REQUEST,
3032 BA_STATUS_ACTIVE,
3033 };
3034
3035 /**
3036 * iwl4964_tl_ba_avail - Find out if an unused aggregation queue is available
3037 */
3038 static u8 iwl4964_tl_ba_avail(struct iwl4965_priv *priv)
3039 {
3040 int i;
3041 struct iwl4965_lq_mngr *lq;
3042 u8 count = 0;
3043 u16 msk;
3044
3045 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3046
3047 /* Find out how many agg queues are in use */
3048 for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) {
3049 msk = 1 << i;
3050 if ((lq->agg_ctrl.granted_ba & msk) ||
3051 (lq->agg_ctrl.wait_for_agg_status & msk))
3052 count++;
3053 }
3054
3055 if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS)
3056 return 1;
3057
3058 return 0;
3059 }
3060
3061 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3062 u8 tid, enum HT_STATUS status);
3063
3064 static int iwl4965_perform_addba(struct iwl4965_priv *priv, u8 tid, u32 length,
3065 u32 ba_timeout)
3066 {
3067 int rc;
3068
3069 rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid);
3070 if (rc)
3071 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3072
3073 return rc;
3074 }
3075
3076 static int iwl4965_perform_delba(struct iwl4965_priv *priv, u8 tid)
3077 {
3078 int rc;
3079
3080 rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid);
3081 if (rc)
3082 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3083
3084 return rc;
3085 }
3086
3087 static void iwl4965_turn_on_agg_for_tid(struct iwl4965_priv *priv,
3088 struct iwl4965_lq_mngr *lq,
3089 u8 auto_agg, u8 tid)
3090 {
3091 u32 tid_msk = (1 << tid);
3092 unsigned long flags;
3093
3094 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3095 /*
3096 if ((auto_agg) && (!lq->enable_counter)){
3097 lq->agg_ctrl.next_retry = 0;
3098 lq->agg_ctrl.tid_retry = 0;
3099 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3100 return;
3101 }
3102 */
3103 if (!(lq->agg_ctrl.granted_ba & tid_msk) &&
3104 (lq->agg_ctrl.requested_ba & tid_msk)) {
3105 u8 available_queues;
3106 u32 load;
3107
3108 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3109 available_queues = iwl4964_tl_ba_avail(priv);
3110 load = iwl4965_tl_get_load(priv, tid);
3111
3112 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3113 if (!available_queues) {
3114 if (auto_agg)
3115 lq->agg_ctrl.tid_retry |= tid_msk;
3116 else {
3117 lq->agg_ctrl.requested_ba &= ~tid_msk;
3118 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3119 }
3120 } else if ((auto_agg) &&
3121 ((load <= lq->agg_ctrl.tid_traffic_load_threshold) ||
3122 ((lq->agg_ctrl.wait_for_agg_status & tid_msk))))
3123 lq->agg_ctrl.tid_retry |= tid_msk;
3124 else {
3125 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3126 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3127 iwl4965_perform_addba(priv, tid, 0x40,
3128 lq->agg_ctrl.ba_timeout);
3129 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3130 }
3131 }
3132 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3133 }
3134
3135 static void iwl4965_turn_on_agg(struct iwl4965_priv *priv, u8 tid)
3136 {
3137 struct iwl4965_lq_mngr *lq;
3138 unsigned long flags;
3139
3140 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3141
3142 if ((tid < TID_MAX_LOAD_COUNT))
3143 iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg,
3144 tid);
3145 else if (tid == TID_ALL_SPECIFIED) {
3146 if (lq->agg_ctrl.requested_ba) {
3147 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
3148 iwl4965_turn_on_agg_for_tid(priv, lq,
3149 lq->agg_ctrl.auto_agg, tid);
3150 } else {
3151 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3152 lq->agg_ctrl.tid_retry = 0;
3153 lq->agg_ctrl.next_retry = 0;
3154 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3155 }
3156 }
3157
3158 }
3159
3160 void iwl4965_turn_off_agg(struct iwl4965_priv *priv, u8 tid)
3161 {
3162 u32 tid_msk;
3163 struct iwl4965_lq_mngr *lq;
3164 unsigned long flags;
3165
3166 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3167
3168 if ((tid < TID_MAX_LOAD_COUNT)) {
3169 tid_msk = 1 << tid;
3170 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3171 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3172 lq->agg_ctrl.requested_ba &= ~tid_msk;
3173 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3174 iwl4965_perform_delba(priv, tid);
3175 } else if (tid == TID_ALL_SPECIFIED) {
3176 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3177 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3178 tid_msk = 1 << tid;
3179 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3180 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3181 iwl4965_perform_delba(priv, tid);
3182 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3183 }
3184 lq->agg_ctrl.requested_ba = 0;
3185 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3186 }
3187 }
3188
3189 /**
3190 * iwl4965_ba_status - Update driver's link quality mgr with tid's HT status
3191 */
3192 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3193 u8 tid, enum HT_STATUS status)
3194 {
3195 struct iwl4965_lq_mngr *lq;
3196 u32 tid_msk = (1 << tid);
3197 unsigned long flags;
3198
3199 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3200
3201 if ((tid >= TID_MAX_LOAD_COUNT))
3202 goto out;
3203
3204 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3205 switch (status) {
3206 case BA_STATUS_ACTIVE:
3207 if (!(lq->agg_ctrl.granted_ba & tid_msk))
3208 lq->agg_ctrl.granted_ba |= tid_msk;
3209 break;
3210 default:
3211 if ((lq->agg_ctrl.granted_ba & tid_msk))
3212 lq->agg_ctrl.granted_ba &= ~tid_msk;
3213 break;
3214 }
3215
3216 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3217 if (status != BA_STATUS_ACTIVE) {
3218 if (lq->agg_ctrl.auto_agg) {
3219 lq->agg_ctrl.tid_retry |= tid_msk;
3220 lq->agg_ctrl.next_retry =
3221 jiffies + msecs_to_jiffies(500);
3222 } else
3223 lq->agg_ctrl.requested_ba &= ~tid_msk;
3224 }
3225 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3226 out:
3227 return;
3228 }
3229
3230 static void iwl4965_bg_agg_work(struct work_struct *work)
3231 {
3232 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
3233 agg_work);
3234
3235 u32 tid;
3236 u32 retry_tid;
3237 u32 tid_msk;
3238 unsigned long flags;
3239 struct iwl4965_lq_mngr *lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3240
3241 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3242 retry_tid = lq->agg_ctrl.tid_retry;
3243 lq->agg_ctrl.tid_retry = 0;
3244 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3245
3246 if (retry_tid == TID_ALL_SPECIFIED)
3247 iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED);
3248 else {
3249 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3250 tid_msk = (1 << tid);
3251 if (retry_tid & tid_msk)
3252 iwl4965_turn_on_agg(priv, tid);
3253 }
3254 }
3255
3256 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3257 if (lq->agg_ctrl.tid_retry)
3258 lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500);
3259 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3260 return;
3261 }
3262 #endif /*CONFIG_IWL4965_HT_AGG */
3263 #endif /* CONFIG_IWL4965_HT */
3264
3265 int iwl4965_tx_cmd(struct iwl4965_priv *priv, struct iwl4965_cmd *out_cmd,
3266 u8 sta_id, dma_addr_t txcmd_phys,
3267 struct ieee80211_hdr *hdr, u8 hdr_len,
3268 struct ieee80211_tx_control *ctrl, void *sta_in)
3269 {
3270 struct iwl4965_tx_cmd cmd;
3271 struct iwl4965_tx_cmd *tx = (struct iwl4965_tx_cmd *)&out_cmd->cmd.payload[0];
3272 dma_addr_t scratch_phys;
3273 u8 unicast = 0;
3274 u8 is_data = 1;
3275 u16 fc;
3276 u16 rate_flags;
3277 int rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
3278 #ifdef CONFIG_IWL4965_HT
3279 #ifdef CONFIG_IWL4965_HT_AGG
3280 __le16 *qc;
3281 #endif /*CONFIG_IWL4965_HT_AGG */
3282 #endif /* CONFIG_IWL4965_HT */
3283
3284 unicast = !is_multicast_ether_addr(hdr->addr1);
3285
3286 fc = le16_to_cpu(hdr->frame_control);
3287 if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
3288 is_data = 0;
3289
3290 memcpy(&cmd, &(out_cmd->cmd.tx), sizeof(struct iwl4965_tx_cmd));
3291 memset(tx, 0, sizeof(struct iwl4965_tx_cmd));
3292 memcpy(tx->hdr, hdr, hdr_len);
3293
3294 tx->len = cmd.len;
3295 tx->driver_txop = cmd.driver_txop;
3296 tx->stop_time.life_time = cmd.stop_time.life_time;
3297 tx->tx_flags = cmd.tx_flags;
3298 tx->sta_id = cmd.sta_id;
3299 tx->tid_tspec = cmd.tid_tspec;
3300 tx->timeout.pm_frame_timeout = cmd.timeout.pm_frame_timeout;
3301 tx->next_frame_len = cmd.next_frame_len;
3302
3303 tx->sec_ctl = cmd.sec_ctl;
3304 memcpy(&(tx->key[0]), &(cmd.key[0]), 16);
3305 tx->tx_flags = cmd.tx_flags;
3306
3307 tx->rts_retry_limit = cmd.rts_retry_limit;
3308 tx->data_retry_limit = cmd.data_retry_limit;
3309
3310 scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3311 offsetof(struct iwl4965_tx_cmd, scratch);
3312 tx->dram_lsb_ptr = cpu_to_le32(scratch_phys);
3313 tx->dram_msb_ptr = iwl4965_get_dma_hi_address(scratch_phys);
3314
3315 /* Hard coded to start at the highest retry fallback position
3316 * until the 4965 specific rate control algorithm is tied in */
3317 tx->initial_rate_index = LINK_QUAL_MAX_RETRY_NUM - 1;
3318
3319 /* Alternate between antenna A and B for successive frames */
3320 if (priv->use_ant_b_for_management_frame) {
3321 priv->use_ant_b_for_management_frame = 0;
3322 rate_flags = RATE_MCS_ANT_B_MSK;
3323 } else {
3324 priv->use_ant_b_for_management_frame = 1;
3325 rate_flags = RATE_MCS_ANT_A_MSK;
3326 }
3327
3328 if (!unicast || !is_data) {
3329 if ((rate_index >= IWL_FIRST_CCK_RATE) &&
3330 (rate_index <= IWL_LAST_CCK_RATE))
3331 rate_flags |= RATE_MCS_CCK_MSK;
3332 } else {
3333 tx->initial_rate_index = 0;
3334 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
3335 }
3336
3337 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(iwl4965_rates[rate_index].plcp,
3338 rate_flags);
3339
3340 if (ieee80211_is_back_request(fc))
3341 tx->tx_flags |= TX_CMD_FLG_ACK_MSK |
3342 TX_CMD_FLG_IMM_BA_RSP_MASK;
3343 #ifdef CONFIG_IWL4965_HT
3344 #ifdef CONFIG_IWL4965_HT_AGG
3345 qc = ieee80211_get_qos_ctrl(hdr);
3346 if (qc &&
3347 (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) {
3348 u8 tid = 0;
3349 tid = (u8) (le16_to_cpu(*qc) & 0xF);
3350 if (tid < TID_MAX_LOAD_COUNT)
3351 iwl4965_tl_add_packet(priv, tid);
3352 }
3353
3354 if (priv->lq_mngr.agg_ctrl.next_retry &&
3355 (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) {
3356 unsigned long flags;
3357
3358 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3359 priv->lq_mngr.agg_ctrl.next_retry = 0;
3360 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3361 schedule_work(&priv->agg_work);
3362 }
3363 #endif
3364 #endif
3365 return 0;
3366 }
3367
3368 /**
3369 * sign_extend - Sign extend a value using specified bit as sign-bit
3370 *
3371 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3372 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3373 *
3374 * @param oper value to sign extend
3375 * @param index 0 based bit index (0<=index<32) to sign bit
3376 */
3377 static s32 sign_extend(u32 oper, int index)
3378 {
3379 u8 shift = 31 - index;
3380
3381 return (s32)(oper << shift) >> shift;
3382 }
3383
3384 /**
3385 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3386 * @statistics: Provides the temperature reading from the uCode
3387 *
3388 * A return of <0 indicates bogus data in the statistics
3389 */
3390 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3391 {
3392 s32 temperature;
3393 s32 vt;
3394 s32 R1, R2, R3;
3395 u32 R4;
3396
3397 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3398 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3399 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3400 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3401 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3402 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3403 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3404 } else {
3405 IWL_DEBUG_TEMP("Running temperature calibration\n");
3406 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3407 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3408 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3409 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3410 }
3411
3412 /*
3413 * Temperature is only 23 bits, so sign extend out to 32.
3414 *
3415 * NOTE If we haven't received a statistics notification yet
3416 * with an updated temperature, use R4 provided to us in the
3417 * "initialize" ALIVE response.
3418 */
3419 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3420 vt = sign_extend(R4, 23);
3421 else
3422 vt = sign_extend(
3423 le32_to_cpu(priv->statistics.general.temperature), 23);
3424
3425 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3426 R1, R2, R3, vt);
3427
3428 if (R3 == R1) {
3429 IWL_ERROR("Calibration conflict R1 == R3\n");
3430 return -1;
3431 }
3432
3433 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3434 * Add offset to center the adjustment around 0 degrees Centigrade. */
3435 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3436 temperature /= (R3 - R1);
3437 temperature = (temperature * 97) / 100 +
3438 TEMPERATURE_CALIB_KELVIN_OFFSET;
3439
3440 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3441 KELVIN_TO_CELSIUS(temperature));
3442
3443 return temperature;
3444 }
3445
3446 /* Adjust Txpower only if temperature variance is greater than threshold. */
3447 #define IWL_TEMPERATURE_THRESHOLD 3
3448
3449 /**
3450 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3451 *
3452 * If the temperature changed has changed sufficiently, then a recalibration
3453 * is needed.
3454 *
3455 * Assumes caller will replace priv->last_temperature once calibration
3456 * executed.
3457 */
3458 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3459 {
3460 int temp_diff;
3461
3462 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3463 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3464 return 0;
3465 }
3466
3467 temp_diff = priv->temperature - priv->last_temperature;
3468
3469 /* get absolute value */
3470 if (temp_diff < 0) {
3471 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3472 temp_diff = -temp_diff;
3473 } else if (temp_diff == 0)
3474 IWL_DEBUG_POWER("Same temp, \n");
3475 else
3476 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3477
3478 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3479 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3480 return 0;
3481 }
3482
3483 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3484
3485 return 1;
3486 }
3487
3488 /* Calculate noise level, based on measurements during network silence just
3489 * before arriving beacon. This measurement can be done only if we know
3490 * exactly when to expect beacons, therefore only when we're associated. */
3491 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3492 {
3493 struct statistics_rx_non_phy *rx_info
3494 = &(priv->statistics.rx.general);
3495 int num_active_rx = 0;
3496 int total_silence = 0;
3497 int bcn_silence_a =
3498 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3499 int bcn_silence_b =
3500 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3501 int bcn_silence_c =
3502 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3503
3504 if (bcn_silence_a) {
3505 total_silence += bcn_silence_a;
3506 num_active_rx++;
3507 }
3508 if (bcn_silence_b) {
3509 total_silence += bcn_silence_b;
3510 num_active_rx++;
3511 }
3512 if (bcn_silence_c) {
3513 total_silence += bcn_silence_c;
3514 num_active_rx++;
3515 }
3516
3517 /* Average among active antennas */
3518 if (num_active_rx)
3519 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3520 else
3521 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3522
3523 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3524 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3525 priv->last_rx_noise);
3526 }
3527
3528 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3529 {
3530 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3531 int change;
3532 s32 temp;
3533
3534 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3535 (int)sizeof(priv->statistics), pkt->len);
3536
3537 change = ((priv->statistics.general.temperature !=
3538 pkt->u.stats.general.temperature) ||
3539 ((priv->statistics.flag &
3540 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3541 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3542
3543 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3544
3545 set_bit(STATUS_STATISTICS, &priv->status);
3546
3547 /* Reschedule the statistics timer to occur in
3548 * REG_RECALIB_PERIOD seconds to ensure we get a
3549 * thermal update even if the uCode doesn't give
3550 * us one */
3551 mod_timer(&priv->statistics_periodic, jiffies +
3552 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3553
3554 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3555 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3556 iwl4965_rx_calc_noise(priv);
3557 #ifdef CONFIG_IWL4965_SENSITIVITY
3558 queue_work(priv->workqueue, &priv->sensitivity_work);
3559 #endif
3560 }
3561
3562 /* If the hardware hasn't reported a change in
3563 * temperature then don't bother computing a
3564 * calibrated temperature value */
3565 if (!change)
3566 return;
3567
3568 temp = iwl4965_get_temperature(priv);
3569 if (temp < 0)
3570 return;
3571
3572 if (priv->temperature != temp) {
3573 if (priv->temperature)
3574 IWL_DEBUG_TEMP("Temperature changed "
3575 "from %dC to %dC\n",
3576 KELVIN_TO_CELSIUS(priv->temperature),
3577 KELVIN_TO_CELSIUS(temp));
3578 else
3579 IWL_DEBUG_TEMP("Temperature "
3580 "initialized to %dC\n",
3581 KELVIN_TO_CELSIUS(temp));
3582 }
3583
3584 priv->temperature = temp;
3585 set_bit(STATUS_TEMPERATURE, &priv->status);
3586
3587 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3588 iwl4965_is_temp_calib_needed(priv))
3589 queue_work(priv->workqueue, &priv->txpower_work);
3590 }
3591
3592 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3593 struct sk_buff *skb,
3594 struct iwl4965_rx_phy_res *rx_start,
3595 struct ieee80211_rx_status *stats,
3596 u32 ampdu_status)
3597 {
3598 s8 signal = stats->ssi;
3599 s8 noise = 0;
3600 int rate = stats->rate;
3601 u64 tsf = stats->mactime;
3602 __le16 phy_flags_hw = rx_start->phy_flags;
3603 struct iwl4965_rt_rx_hdr {
3604 struct ieee80211_radiotap_header rt_hdr;
3605 __le64 rt_tsf; /* TSF */
3606 u8 rt_flags; /* radiotap packet flags */
3607 u8 rt_rate; /* rate in 500kb/s */
3608 __le16 rt_channelMHz; /* channel in MHz */
3609 __le16 rt_chbitmask; /* channel bitfield */
3610 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3611 s8 rt_dbmnoise;
3612 u8 rt_antenna; /* antenna number */
3613 } __attribute__ ((packed)) *iwl4965_rt;
3614
3615 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3616 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3617 if (net_ratelimit())
3618 printk(KERN_ERR "not enough headroom [%d] for "
3619 "radiotap head [%zd]\n",
3620 skb_headroom(skb), sizeof(*iwl4965_rt));
3621 return;
3622 }
3623
3624 /* put radiotap header in front of 802.11 header and data */
3625 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3626
3627 /* initialise radiotap header */
3628 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3629 iwl4965_rt->rt_hdr.it_pad = 0;
3630
3631 /* total header + data */
3632 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3633 &iwl4965_rt->rt_hdr.it_len);
3634
3635 /* Indicate all the fields we add to the radiotap header */
3636 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3637 (1 << IEEE80211_RADIOTAP_FLAGS) |
3638 (1 << IEEE80211_RADIOTAP_RATE) |
3639 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3640 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3641 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3642 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3643 &iwl4965_rt->rt_hdr.it_present);
3644
3645 /* Zero the flags, we'll add to them as we go */
3646 iwl4965_rt->rt_flags = 0;
3647
3648 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3649
3650 iwl4965_rt->rt_dbmsignal = signal;
3651 iwl4965_rt->rt_dbmnoise = noise;
3652
3653 /* Convert the channel frequency and set the flags */
3654 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3655 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3656 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3657 IEEE80211_CHAN_5GHZ),
3658 &iwl4965_rt->rt_chbitmask);
3659 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3660 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3661 IEEE80211_CHAN_2GHZ),
3662 &iwl4965_rt->rt_chbitmask);
3663 else /* 802.11g */
3664 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3665 IEEE80211_CHAN_2GHZ),
3666 &iwl4965_rt->rt_chbitmask);
3667
3668 rate = iwl4965_rate_index_from_plcp(rate);
3669 if (rate == -1)
3670 iwl4965_rt->rt_rate = 0;
3671 else
3672 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3673
3674 /*
3675 * "antenna number"
3676 *
3677 * It seems that the antenna field in the phy flags value
3678 * is actually a bitfield. This is undefined by radiotap,
3679 * it wants an actual antenna number but I always get "7"
3680 * for most legacy frames I receive indicating that the
3681 * same frame was received on all three RX chains.
3682 *
3683 * I think this field should be removed in favour of a
3684 * new 802.11n radiotap field "RX chains" that is defined
3685 * as a bitmask.
3686 */
3687 iwl4965_rt->rt_antenna =
3688 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3689
3690 /* set the preamble flag if appropriate */
3691 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3692 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3693
3694 stats->flag |= RX_FLAG_RADIOTAP;
3695 }
3696
3697 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3698 int include_phy,
3699 struct iwl4965_rx_mem_buffer *rxb,
3700 struct ieee80211_rx_status *stats)
3701 {
3702 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3703 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3704 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3705 struct ieee80211_hdr *hdr;
3706 u16 len;
3707 __le32 *rx_end;
3708 unsigned int skblen;
3709 u32 ampdu_status;
3710
3711 if (!include_phy && priv->last_phy_res[0])
3712 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3713
3714 if (!rx_start) {
3715 IWL_ERROR("MPDU frame without a PHY data\n");
3716 return;
3717 }
3718 if (include_phy) {
3719 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3720 rx_start->cfg_phy_cnt);
3721
3722 len = le16_to_cpu(rx_start->byte_count);
3723
3724 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3725 sizeof(struct iwl4965_rx_phy_res) +
3726 rx_start->cfg_phy_cnt + len);
3727
3728 } else {
3729 struct iwl4965_rx_mpdu_res_start *amsdu =
3730 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3731
3732 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3733 sizeof(struct iwl4965_rx_mpdu_res_start));
3734 len = le16_to_cpu(amsdu->byte_count);
3735 rx_start->byte_count = amsdu->byte_count;
3736 rx_end = (__le32 *) (((u8 *) hdr) + len);
3737 }
3738 if (len > priv->hw_setting.max_pkt_size || len < 16) {
3739 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3740 return;
3741 }
3742
3743 ampdu_status = le32_to_cpu(*rx_end);
3744 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3745
3746 /* start from MAC */
3747 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3748 skb_put(rxb->skb, len); /* end where data ends */
3749
3750 /* We only process data packets if the interface is open */
3751 if (unlikely(!priv->is_open)) {
3752 IWL_DEBUG_DROP_LIMIT
3753 ("Dropping packet while interface is not open.\n");
3754 return;
3755 }
3756
3757 stats->flag = 0;
3758 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3759
3760 if (iwl4965_param_hwcrypto)
3761 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3762
3763 if (priv->add_radiotap)
3764 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3765
3766 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3767 priv->alloc_rxb_skb--;
3768 rxb->skb = NULL;
3769 #ifdef LED
3770 priv->led_packets += len;
3771 iwl4965_setup_activity_timer(priv);
3772 #endif
3773 }
3774
3775 /* Calc max signal level (dBm) among 3 possible receivers */
3776 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3777 {
3778 /* data from PHY/DSP regarding signal strength, etc.,
3779 * contents are always there, not configurable by host. */
3780 struct iwl4965_rx_non_cfg_phy *ncphy =
3781 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3782 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3783 >> IWL_AGC_DB_POS;
3784
3785 u32 valid_antennae =
3786 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3787 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3788 u8 max_rssi = 0;
3789 u32 i;
3790
3791 /* Find max rssi among 3 possible receivers.
3792 * These values are measured by the digital signal processor (DSP).
3793 * They should stay fairly constant even as the signal strength varies,
3794 * if the radio's automatic gain control (AGC) is working right.
3795 * AGC value (see below) will provide the "interesting" info. */
3796 for (i = 0; i < 3; i++)
3797 if (valid_antennae & (1 << i))
3798 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3799
3800 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3801 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3802 max_rssi, agc);
3803
3804 /* dBm = max_rssi dB - agc dB - constant.
3805 * Higher AGC (higher radio gain) means lower signal. */
3806 return (max_rssi - agc - IWL_RSSI_OFFSET);
3807 }
3808
3809 #ifdef CONFIG_IWL4965_HT
3810
3811 /* Parsed Information Elements */
3812 struct ieee802_11_elems {
3813 u8 *ds_params;
3814 u8 ds_params_len;
3815 u8 *tim;
3816 u8 tim_len;
3817 u8 *ibss_params;
3818 u8 ibss_params_len;
3819 u8 *erp_info;
3820 u8 erp_info_len;
3821 u8 *ht_cap_param;
3822 u8 ht_cap_param_len;
3823 u8 *ht_extra_param;
3824 u8 ht_extra_param_len;
3825 };
3826
3827 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3828 {
3829 size_t left = len;
3830 u8 *pos = start;
3831 int unknown = 0;
3832
3833 memset(elems, 0, sizeof(*elems));
3834
3835 while (left >= 2) {
3836 u8 id, elen;
3837
3838 id = *pos++;
3839 elen = *pos++;
3840 left -= 2;
3841
3842 if (elen > left)
3843 return -1;
3844
3845 switch (id) {
3846 case WLAN_EID_DS_PARAMS:
3847 elems->ds_params = pos;
3848 elems->ds_params_len = elen;
3849 break;
3850 case WLAN_EID_TIM:
3851 elems->tim = pos;
3852 elems->tim_len = elen;
3853 break;
3854 case WLAN_EID_IBSS_PARAMS:
3855 elems->ibss_params = pos;
3856 elems->ibss_params_len = elen;
3857 break;
3858 case WLAN_EID_ERP_INFO:
3859 elems->erp_info = pos;
3860 elems->erp_info_len = elen;
3861 break;
3862 case WLAN_EID_HT_CAPABILITY:
3863 elems->ht_cap_param = pos;
3864 elems->ht_cap_param_len = elen;
3865 break;
3866 case WLAN_EID_HT_EXTRA_INFO:
3867 elems->ht_extra_param = pos;
3868 elems->ht_extra_param_len = elen;
3869 break;
3870 default:
3871 unknown++;
3872 break;
3873 }
3874
3875 left -= elen;
3876 pos += elen;
3877 }
3878
3879 return 0;
3880 }
3881
3882 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info, int mode)
3883 {
3884 ht_info->cap = 0;
3885 memset(ht_info->supp_mcs_set, 0, 16);
3886
3887 ht_info->ht_supported = 1;
3888
3889 if (mode == MODE_IEEE80211A) {
3890 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3891 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3892 ht_info->supp_mcs_set[4] = 0x01;
3893 }
3894 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3895 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3896 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3897 (IWL_MIMO_PS_NONE << 2));
3898 if (iwl4965_param_amsdu_size_8K) {
3899 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3900 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3901 }
3902
3903 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3904 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3905
3906 ht_info->supp_mcs_set[0] = 0xFF;
3907 ht_info->supp_mcs_set[1] = 0xFF;
3908 }
3909 #endif /* CONFIG_IWL4965_HT */
3910
3911 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3912 {
3913 unsigned long flags;
3914
3915 spin_lock_irqsave(&priv->sta_lock, flags);
3916 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3917 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3918 priv->stations[sta_id].sta.sta.modify_mask = 0;
3919 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3920 spin_unlock_irqrestore(&priv->sta_lock, flags);
3921
3922 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3923 }
3924
3925 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3926 {
3927 /* FIXME: need locking over ps_status ??? */
3928 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3929
3930 if (sta_id != IWL_INVALID_STATION) {
3931 u8 sta_awake = priv->stations[sta_id].
3932 ps_status == STA_PS_STATUS_WAKE;
3933
3934 if (sta_awake && ps_bit)
3935 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3936 else if (!sta_awake && !ps_bit) {
3937 iwl4965_sta_modify_ps_wake(priv, sta_id);
3938 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3939 }
3940 }
3941 }
3942
3943 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3944
3945 /* Called for REPLY_4965_RX (legacy ABG frames), or
3946 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3947 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3948 struct iwl4965_rx_mem_buffer *rxb)
3949 {
3950 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3951 /* Use phy data (Rx signal strength, etc.) contained within
3952 * this rx packet for legacy frames,
3953 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3954 int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3955 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3956 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3957 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3958 __le32 *rx_end;
3959 unsigned int len = 0;
3960 struct ieee80211_hdr *header;
3961 u16 fc;
3962 struct ieee80211_rx_status stats = {
3963 .mactime = le64_to_cpu(rx_start->timestamp),
3964 .channel = le16_to_cpu(rx_start->channel),
3965 .phymode =
3966 (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3967 MODE_IEEE80211G : MODE_IEEE80211A,
3968 .antenna = 0,
3969 .rate = iwl4965_hw_get_rate(rx_start->rate_n_flags),
3970 .flag = 0,
3971 };
3972 u8 network_packet;
3973
3974 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3975 IWL_DEBUG_DROP
3976 ("dsp size out of range [0,20]: "
3977 "%d/n", rx_start->cfg_phy_cnt);
3978 return;
3979 }
3980 if (!include_phy) {
3981 if (priv->last_phy_res[0])
3982 rx_start = (struct iwl4965_rx_phy_res *)
3983 &priv->last_phy_res[1];
3984 else
3985 rx_start = NULL;
3986 }
3987
3988 if (!rx_start) {
3989 IWL_ERROR("MPDU frame without a PHY data\n");
3990 return;
3991 }
3992
3993 if (include_phy) {
3994 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3995 + rx_start->cfg_phy_cnt);
3996
3997 len = le16_to_cpu(rx_start->byte_count);
3998 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3999 sizeof(struct iwl4965_rx_phy_res) + len);
4000 } else {
4001 struct iwl4965_rx_mpdu_res_start *amsdu =
4002 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
4003
4004 header = (void *)(pkt->u.raw +
4005 sizeof(struct iwl4965_rx_mpdu_res_start));
4006 len = le16_to_cpu(amsdu->byte_count);
4007 rx_end = (__le32 *) (pkt->u.raw +
4008 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
4009 }
4010
4011 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
4012 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
4013 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
4014 le32_to_cpu(*rx_end));
4015 return;
4016 }
4017
4018 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
4019
4020 stats.freq = ieee80211chan2mhz(stats.channel);
4021
4022 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
4023 stats.ssi = iwl4965_calc_rssi(rx_start);
4024
4025 /* Meaningful noise values are available only from beacon statistics,
4026 * which are gathered only when associated, and indicate noise
4027 * only for the associated network channel ...
4028 * Ignore these noise values while scanning (other channels) */
4029 if (iwl4965_is_associated(priv) &&
4030 !test_bit(STATUS_SCANNING, &priv->status)) {
4031 stats.noise = priv->last_rx_noise;
4032 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
4033 } else {
4034 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4035 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
4036 }
4037
4038 /* Reset beacon noise level if not associated. */
4039 if (!iwl4965_is_associated(priv))
4040 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4041
4042 #ifdef CONFIG_IWL4965_DEBUG
4043 /* TODO: Parts of iwl4965_report_frame are broken for 4965 */
4044 if (iwl4965_debug_level & (IWL_DL_RX))
4045 /* Set "1" to report good data frames in groups of 100 */
4046 iwl4965_report_frame(priv, pkt, header, 1);
4047
4048 if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
4049 IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
4050 stats.ssi, stats.noise, stats.signal,
4051 (long unsigned int)le64_to_cpu(rx_start->timestamp));
4052 #endif
4053
4054 network_packet = iwl4965_is_network_packet(priv, header);
4055 if (network_packet) {
4056 priv->last_rx_rssi = stats.ssi;
4057 priv->last_beacon_time = priv->ucode_beacon_time;
4058 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
4059 }
4060
4061 fc = le16_to_cpu(header->frame_control);
4062 switch (fc & IEEE80211_FCTL_FTYPE) {
4063 case IEEE80211_FTYPE_MGMT:
4064
4065 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4066 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4067 header->addr2);
4068 switch (fc & IEEE80211_FCTL_STYPE) {
4069 case IEEE80211_STYPE_PROBE_RESP:
4070 case IEEE80211_STYPE_BEACON:
4071 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
4072 !compare_ether_addr(header->addr2, priv->bssid)) ||
4073 (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
4074 !compare_ether_addr(header->addr3, priv->bssid))) {
4075 struct ieee80211_mgmt *mgmt =
4076 (struct ieee80211_mgmt *)header;
4077 u64 timestamp =
4078 le64_to_cpu(mgmt->u.beacon.timestamp);
4079
4080 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4081 priv->timestamp1 =
4082 (timestamp >> 32) & 0xFFFFFFFF;
4083 priv->beacon_int = le16_to_cpu(
4084 mgmt->u.beacon.beacon_int);
4085 if (priv->call_post_assoc_from_beacon &&
4086 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4087 priv->call_post_assoc_from_beacon = 0;
4088 queue_work(priv->workqueue,
4089 &priv->post_associate.work);
4090 }
4091 }
4092 break;
4093
4094 case IEEE80211_STYPE_ACTION:
4095 break;
4096
4097 /*
4098 * TODO: There is no callback function from upper
4099 * stack to inform us when associated status. this
4100 * work around to sniff assoc_resp management frame
4101 * and finish the association process.
4102 */
4103 case IEEE80211_STYPE_ASSOC_RESP:
4104 case IEEE80211_STYPE_REASSOC_RESP:
4105 if (network_packet) {
4106 #ifdef CONFIG_IWL4965_HT
4107 u8 *pos = NULL;
4108 struct ieee802_11_elems elems;
4109 #endif /*CONFIG_IWL4965_HT */
4110 struct ieee80211_mgmt *mgnt =
4111 (struct ieee80211_mgmt *)header;
4112
4113 /* We have just associated, give some
4114 * time for the 4-way handshake if
4115 * any. Don't start scan too early. */
4116 priv->next_scan_jiffies = jiffies +
4117 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4118
4119 priv->assoc_id = (~((1 << 15) | (1 << 14))
4120 & le16_to_cpu(mgnt->u.assoc_resp.aid));
4121 priv->assoc_capability =
4122 le16_to_cpu(
4123 mgnt->u.assoc_resp.capab_info);
4124 #ifdef CONFIG_IWL4965_HT
4125 pos = mgnt->u.assoc_resp.variable;
4126 if (!parse_elems(pos,
4127 len - (pos - (u8 *) mgnt),
4128 &elems)) {
4129 if (elems.ht_extra_param &&
4130 elems.ht_cap_param)
4131 break;
4132 }
4133 #endif /*CONFIG_IWL4965_HT */
4134 /* assoc_id is 0 no association */
4135 if (!priv->assoc_id)
4136 break;
4137 if (priv->beacon_int)
4138 queue_work(priv->workqueue,
4139 &priv->post_associate.work);
4140 else
4141 priv->call_post_assoc_from_beacon = 1;
4142 }
4143
4144 break;
4145
4146 case IEEE80211_STYPE_PROBE_REQ:
4147 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4148 !iwl4965_is_associated(priv)) {
4149 DECLARE_MAC_BUF(mac1);
4150 DECLARE_MAC_BUF(mac2);
4151 DECLARE_MAC_BUF(mac3);
4152
4153 IWL_DEBUG_DROP("Dropping (non network): "
4154 "%s, %s, %s\n",
4155 print_mac(mac1, header->addr1),
4156 print_mac(mac2, header->addr2),
4157 print_mac(mac3, header->addr3));
4158 return;
4159 }
4160 }
4161 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
4162 break;
4163
4164 case IEEE80211_FTYPE_CTL:
4165 #ifdef CONFIG_IWL4965_HT
4166 switch (fc & IEEE80211_FCTL_STYPE) {
4167 case IEEE80211_STYPE_BACK_REQ:
4168 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4169 iwl4965_handle_data_packet(priv, 0, include_phy,
4170 rxb, &stats);
4171 break;
4172 default:
4173 break;
4174 }
4175 #endif
4176 break;
4177
4178 case IEEE80211_FTYPE_DATA: {
4179 DECLARE_MAC_BUF(mac1);
4180 DECLARE_MAC_BUF(mac2);
4181 DECLARE_MAC_BUF(mac3);
4182
4183 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4184 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4185 header->addr2);
4186
4187 if (unlikely(!network_packet))
4188 IWL_DEBUG_DROP("Dropping (non network): "
4189 "%s, %s, %s\n",
4190 print_mac(mac1, header->addr1),
4191 print_mac(mac2, header->addr2),
4192 print_mac(mac3, header->addr3));
4193 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4194 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4195 print_mac(mac1, header->addr1),
4196 print_mac(mac2, header->addr2),
4197 print_mac(mac3, header->addr3));
4198 else
4199 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4200 &stats);
4201 break;
4202 }
4203 default:
4204 break;
4205
4206 }
4207 }
4208
4209 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4210 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4211 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4212 struct iwl4965_rx_mem_buffer *rxb)
4213 {
4214 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4215 priv->last_phy_res[0] = 1;
4216 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4217 sizeof(struct iwl4965_rx_phy_res));
4218 }
4219
4220 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4221 struct iwl4965_rx_mem_buffer *rxb)
4222
4223 {
4224 #ifdef CONFIG_IWL4965_SENSITIVITY
4225 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4226 struct iwl4965_missed_beacon_notif *missed_beacon;
4227
4228 missed_beacon = &pkt->u.missed_beacon;
4229 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4230 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4231 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4232 le32_to_cpu(missed_beacon->total_missed_becons),
4233 le32_to_cpu(missed_beacon->num_recvd_beacons),
4234 le32_to_cpu(missed_beacon->num_expected_beacons));
4235 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4236 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4237 queue_work(priv->workqueue, &priv->sensitivity_work);
4238 }
4239 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4240 }
4241
4242 #ifdef CONFIG_IWL4965_HT
4243 #ifdef CONFIG_IWL4965_HT_AGG
4244
4245 /**
4246 * iwl4965_set_tx_status - Update driver's record of one Tx frame's status
4247 *
4248 * This will get sent to mac80211.
4249 */
4250 static void iwl4965_set_tx_status(struct iwl4965_priv *priv, int txq_id, int idx,
4251 u32 status, u32 retry_count, u32 rate)
4252 {
4253 struct ieee80211_tx_status *tx_status =
4254 &(priv->txq[txq_id].txb[idx].status);
4255
4256 tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0;
4257 tx_status->retry_count += retry_count;
4258 tx_status->control.tx_rate = rate;
4259 }
4260
4261
4262 /**
4263 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4264 */
4265 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4266 int sta_id, int tid)
4267 {
4268 unsigned long flags;
4269
4270 /* Remove "disable" flag, to enable Tx for this TID */
4271 spin_lock_irqsave(&priv->sta_lock, flags);
4272 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4273 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4274 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4275 spin_unlock_irqrestore(&priv->sta_lock, flags);
4276
4277 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4278 }
4279
4280
4281 /**
4282 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4283 *
4284 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4285 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4286 */
4287 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4288 struct iwl4965_ht_agg *agg,
4289 struct iwl4965_compressed_ba_resp*
4290 ba_resp)
4291
4292 {
4293 int i, sh, ack;
4294 u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl);
4295 u32 bitmap0, bitmap1;
4296 u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0);
4297 u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1);
4298
4299 if (unlikely(!agg->wait_for_ba)) {
4300 IWL_ERROR("Received BA when not expected\n");
4301 return -EINVAL;
4302 }
4303
4304 /* Mark that the expected block-ack response arrived */
4305 agg->wait_for_ba = 0;
4306 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl);
4307
4308 /* Calculate shift to align block-ack bits with our Tx window bits */
4309 sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl>>4);
4310 if (sh < 0) /* tbw something is wrong with indices */
4311 sh += 0x100;
4312
4313 /* don't use 64-bit values for now */
4314 bitmap0 = resp_bitmap0 >> sh;
4315 bitmap1 = resp_bitmap1 >> sh;
4316 bitmap0 |= (resp_bitmap1 & ((1<<sh)|((1<<sh)-1))) << (32 - sh);
4317
4318 if (agg->frame_count > (64 - sh)) {
4319 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4320 return -1;
4321 }
4322
4323 /* check for success or failure according to the
4324 * transmitted bitmap and block-ack bitmap */
4325 bitmap0 &= agg->bitmap0;
4326 bitmap1 &= agg->bitmap1;
4327
4328 /* For each frame attempted in aggregation,
4329 * update driver's record of tx frame's status. */
4330 for (i = 0; i < agg->frame_count ; i++) {
4331 int idx = (agg->start_idx + i) & 0xff;
4332 ack = bitmap0 & (1 << i);
4333 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4334 ack? "ACK":"NACK", i, idx, agg->start_idx + i);
4335 iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0,
4336 agg->rate_n_flags);
4337
4338 }
4339
4340 IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1);
4341
4342 return 0;
4343 }
4344
4345 /**
4346 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4347 * @index -- current index
4348 * @n_bd -- total number of entries in queue (s/b power of 2)
4349 */
4350 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4351 {
4352 return (index == 0) ? n_bd - 1 : index - 1;
4353 }
4354
4355 /**
4356 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4357 *
4358 * Handles block-acknowledge notification from device, which reports success
4359 * of frames sent via aggregation.
4360 */
4361 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4362 struct iwl4965_rx_mem_buffer *rxb)
4363 {
4364 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4365 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4366 int index;
4367 struct iwl4965_tx_queue *txq = NULL;
4368 struct iwl4965_ht_agg *agg;
4369
4370 /* "flow" corresponds to Tx queue */
4371 u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow);
4372
4373 /* "ssn" is start of block-ack Tx window, corresponds to index
4374 * (in Tx queue's circular buffer) of first TFD/frame in window */
4375 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4376
4377 if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) {
4378 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4379 return;
4380 }
4381
4382 txq = &priv->txq[ba_resp_scd_flow];
4383 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4384
4385 /* Find index just before block-ack window */
4386 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4387
4388 /* TODO: Need to get this copy more safely - now good for debug */
4389 /*
4390 {
4391 DECLARE_MAC_BUF(mac);
4392 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4393 "sta_id = %d\n",
4394 agg->wait_for_ba,
4395 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4396 ba_resp->sta_id);
4397 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
4398 "%d, scd_ssn = %d\n",
4399 ba_resp->tid,
4400 ba_resp->ba_seq_ctl,
4401 ba_resp->ba_bitmap1,
4402 ba_resp->ba_bitmap0,
4403 ba_resp->scd_flow,
4404 ba_resp->scd_ssn);
4405 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
4406 agg->start_idx,
4407 agg->bitmap1,
4408 agg->bitmap0);
4409 }
4410 */
4411
4412 /* Update driver's record of ACK vs. not for each frame in window */
4413 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4414
4415 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4416 * block-ack window (we assume that they've been successfully
4417 * transmitted ... if not, it's too late anyway). */
4418 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff))
4419 iwl4965_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
4420
4421 }
4422
4423
4424 /**
4425 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4426 */
4427 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv, u16 txq_id)
4428 {
4429 /* Simply stop the queue, but don't change any configuration;
4430 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4431 iwl4965_write_prph(priv,
4432 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4433 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4434 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4435 }
4436
4437 /**
4438 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4439 */
4440 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4441 u16 txq_id)
4442 {
4443 u32 tbl_dw_addr;
4444 u32 tbl_dw;
4445 u16 scd_q2ratid;
4446
4447 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4448
4449 tbl_dw_addr = priv->scd_base_addr +
4450 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4451
4452 tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4453
4454 if (txq_id & 0x1)
4455 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4456 else
4457 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4458
4459 iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4460
4461 return 0;
4462 }
4463
4464 /**
4465 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4466 *
4467 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4468 * i.e. it must be one of the higher queues used for aggregation
4469 */
4470 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4471 int tx_fifo, int sta_id, int tid,
4472 u16 ssn_idx)
4473 {
4474 unsigned long flags;
4475 int rc;
4476 u16 ra_tid;
4477
4478 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4479 IWL_WARNING("queue number too small: %d, must be > %d\n",
4480 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4481
4482 ra_tid = BUILD_RAxTID(sta_id, tid);
4483
4484 /* Modify device's station table to Tx this TID */
4485 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4486
4487 spin_lock_irqsave(&priv->lock, flags);
4488 rc = iwl4965_grab_nic_access(priv);
4489 if (rc) {
4490 spin_unlock_irqrestore(&priv->lock, flags);
4491 return rc;
4492 }
4493
4494 /* Stop this Tx queue before configuring it */
4495 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4496
4497 /* Map receiver-address / traffic-ID to this queue */
4498 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4499
4500 /* Set this queue as a chain-building queue */
4501 iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1<<txq_id));
4502
4503 /* Place first TFD at index corresponding to start sequence number.
4504 * Assumes that ssn_idx is valid (!= 0xFFF) */
4505 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4506 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4507 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4508
4509 /* Set up Tx window size and frame limit for this queue */
4510 iwl4965_write_targ_mem(priv,
4511 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4512 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4513 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4514
4515 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4516 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4517 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4518 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4519
4520 iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4521
4522 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4523 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4524
4525 iwl4965_release_nic_access(priv);
4526 spin_unlock_irqrestore(&priv->lock, flags);
4527
4528 return 0;
4529 }
4530
4531 /**
4532 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4533 */
4534 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4535 u16 ssn_idx, u8 tx_fifo)
4536 {
4537 unsigned long flags;
4538 int rc;
4539
4540 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4541 IWL_WARNING("queue number too small: %d, must be > %d\n",
4542 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4543 return -EINVAL;
4544 }
4545
4546 spin_lock_irqsave(&priv->lock, flags);
4547 rc = iwl4965_grab_nic_access(priv);
4548 if (rc) {
4549 spin_unlock_irqrestore(&priv->lock, flags);
4550 return rc;
4551 }
4552
4553 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4554
4555 iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4556
4557 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4558 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4559 /* supposes that ssn_idx is valid (!= 0xFFF) */
4560 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4561
4562 iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4563 iwl4965_txq_ctx_deactivate(priv, txq_id);
4564 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4565
4566 iwl4965_release_nic_access(priv);
4567 spin_unlock_irqrestore(&priv->lock, flags);
4568
4569 return 0;
4570 }
4571
4572 #endif/* CONFIG_IWL4965_HT_AGG */
4573 #endif /* CONFIG_IWL4965_HT */
4574
4575 /**
4576 * iwl4965_add_station - Initialize a station's hardware rate table
4577 *
4578 * The uCode's station table contains a table of fallback rates
4579 * for automatic fallback during transmission.
4580 *
4581 * NOTE: This sets up a default set of values. These will be replaced later
4582 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4583 * rc80211_simple.
4584 *
4585 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4586 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4587 * which requires station table entry to exist).
4588 */
4589 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4590 {
4591 int i, r;
4592 struct iwl4965_link_quality_cmd link_cmd = {
4593 .reserved1 = 0,
4594 };
4595 u16 rate_flags;
4596
4597 /* Set up the rate scaling to start at selected rate, fall back
4598 * all the way down to 1M in IEEE order, and then spin on 1M */
4599 if (is_ap)
4600 r = IWL_RATE_54M_INDEX;
4601 else if (priv->phymode == MODE_IEEE80211A)
4602 r = IWL_RATE_6M_INDEX;
4603 else
4604 r = IWL_RATE_1M_INDEX;
4605
4606 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4607 rate_flags = 0;
4608 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4609 rate_flags |= RATE_MCS_CCK_MSK;
4610
4611 /* Use Tx antenna B only */
4612 rate_flags |= RATE_MCS_ANT_B_MSK;
4613 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4614
4615 link_cmd.rs_table[i].rate_n_flags =
4616 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4617 r = iwl4965_get_prev_ieee_rate(r);
4618 }
4619
4620 link_cmd.general_params.single_stream_ant_msk = 2;
4621 link_cmd.general_params.dual_stream_ant_msk = 3;
4622 link_cmd.agg_params.agg_dis_start_th = 3;
4623 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4624
4625 /* Update the rate scaling for control frame Tx to AP */
4626 link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4627
4628 iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4629 &link_cmd);
4630 }
4631
4632 #ifdef CONFIG_IWL4965_HT
4633
4634 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv, int phymode,
4635 u16 channel, u8 extension_chan_offset)
4636 {
4637 const struct iwl4965_channel_info *ch_info;
4638
4639 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
4640 if (!is_channel_valid(ch_info))
4641 return 0;
4642
4643 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4644 return 0;
4645
4646 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4647 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4648 return 1;
4649
4650 return 0;
4651 }
4652
4653 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4654 struct ieee80211_ht_info *sta_ht_inf)
4655 {
4656 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4657
4658 if ((!iwl_ht_conf->is_ht) ||
4659 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4660 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4661 return 0;
4662
4663 if (sta_ht_inf) {
4664 if ((!sta_ht_inf->ht_supported) ||
4665 (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
4666 return 0;
4667 }
4668
4669 return (iwl4965_is_channel_extension(priv, priv->phymode,
4670 iwl_ht_conf->control_channel,
4671 iwl_ht_conf->extension_chan_offset));
4672 }
4673
4674 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4675 {
4676 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4677 u32 val;
4678
4679 if (!ht_info->is_ht)
4680 return;
4681
4682 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4683 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4684 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4685 else
4686 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4687 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4688
4689 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4690 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4691 le16_to_cpu(rxon->channel),
4692 ht_info->control_channel);
4693 rxon->channel = cpu_to_le16(ht_info->control_channel);
4694 return;
4695 }
4696
4697 /* Note: control channel is opposite of extension channel */
4698 switch (ht_info->extension_chan_offset) {
4699 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4700 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4701 break;
4702 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4703 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4704 break;
4705 case IWL_EXT_CHANNEL_OFFSET_AUTO:
4706 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4707 break;
4708 default:
4709 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4710 break;
4711 }
4712
4713 val = ht_info->ht_protection;
4714
4715 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4716
4717 iwl4965_set_rxon_chain(priv);
4718
4719 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4720 "rxon flags 0x%X operation mode :0x%X "
4721 "extension channel offset 0x%x "
4722 "control chan %d\n",
4723 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4724 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4725 ht_info->extension_chan_offset,
4726 ht_info->control_channel);
4727 return;
4728 }
4729
4730 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4731 struct ieee80211_ht_info *sta_ht_inf)
4732 {
4733 __le32 sta_flags;
4734
4735 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4736 goto done;
4737
4738 sta_flags = priv->stations[index].sta.station_flags;
4739
4740 if (((sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS >> 2))
4741 == IWL_MIMO_PS_DYNAMIC)
4742 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4743 else
4744 sta_flags &= ~STA_FLG_RTS_MIMO_PROT_MSK;
4745
4746 sta_flags |= cpu_to_le32(
4747 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4748
4749 sta_flags |= cpu_to_le32(
4750 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4751
4752 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4753 sta_flags |= STA_FLG_FAT_EN_MSK;
4754 else
4755 sta_flags &= (~STA_FLG_FAT_EN_MSK);
4756
4757 priv->stations[index].sta.station_flags = sta_flags;
4758 done:
4759 return;
4760 }
4761
4762 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4763 int sta_id, int tid, u16 ssn)
4764 {
4765 unsigned long flags;
4766
4767 spin_lock_irqsave(&priv->sta_lock, flags);
4768 priv->stations[sta_id].sta.station_flags_msk = 0;
4769 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4770 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4771 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4772 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4773 spin_unlock_irqrestore(&priv->sta_lock, flags);
4774
4775 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4776 }
4777
4778 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4779 int sta_id, int tid)
4780 {
4781 unsigned long flags;
4782
4783 spin_lock_irqsave(&priv->sta_lock, flags);
4784 priv->stations[sta_id].sta.station_flags_msk = 0;
4785 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4786 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4787 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4788 spin_unlock_irqrestore(&priv->sta_lock, flags);
4789
4790 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4791 }
4792
4793 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4794 enum ieee80211_ampdu_mlme_action action,
4795 const u8 *addr, u16 tid, u16 ssn)
4796 {
4797 struct iwl4965_priv *priv = hw->priv;
4798 int sta_id;
4799 DECLARE_MAC_BUF(mac);
4800
4801 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4802 print_mac(mac, addr), tid);
4803 sta_id = iwl4965_hw_find_station(priv, addr);
4804 switch (action) {
4805 case IEEE80211_AMPDU_RX_START:
4806 IWL_DEBUG_HT("start Rx\n");
4807 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, ssn);
4808 break;
4809 case IEEE80211_AMPDU_RX_STOP:
4810 IWL_DEBUG_HT("stop Rx\n");
4811 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4812 break;
4813 default:
4814 IWL_DEBUG_HT("unknown\n");
4815 return -EINVAL;
4816 break;
4817 }
4818 return 0;
4819 }
4820
4821 #ifdef CONFIG_IWL4965_HT_AGG
4822
4823 static const u16 default_tid_to_tx_fifo[] = {
4824 IWL_TX_FIFO_AC1,
4825 IWL_TX_FIFO_AC0,
4826 IWL_TX_FIFO_AC0,
4827 IWL_TX_FIFO_AC1,
4828 IWL_TX_FIFO_AC2,
4829 IWL_TX_FIFO_AC2,
4830 IWL_TX_FIFO_AC3,
4831 IWL_TX_FIFO_AC3,
4832 IWL_TX_FIFO_NONE,
4833 IWL_TX_FIFO_NONE,
4834 IWL_TX_FIFO_NONE,
4835 IWL_TX_FIFO_NONE,
4836 IWL_TX_FIFO_NONE,
4837 IWL_TX_FIFO_NONE,
4838 IWL_TX_FIFO_NONE,
4839 IWL_TX_FIFO_NONE,
4840 IWL_TX_FIFO_AC3
4841 };
4842
4843 /*
4844 * Find first available (lowest unused) Tx Queue, mark it "active".
4845 * Called only when finding queue for aggregation.
4846 * Should never return anything < 7, because they should already
4847 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4848 */
4849 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4850 {
4851 int txq_id;
4852
4853 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4854 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4855 return txq_id;
4856 return -1;
4857 }
4858
4859 int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid,
4860 u16 *start_seq_num)
4861 {
4862
4863 struct iwl4965_priv *priv = hw->priv;
4864 int sta_id;
4865 int tx_fifo;
4866 int txq_id;
4867 int ssn = -1;
4868 unsigned long flags;
4869 struct iwl4965_tid_data *tid_data;
4870 DECLARE_MAC_BUF(mac);
4871
4872 /* Determine Tx DMA/FIFO channel for this Traffic ID */
4873 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4874 tx_fifo = default_tid_to_tx_fifo[tid];
4875 else
4876 return -EINVAL;
4877
4878 IWL_WARNING("iwl-AGG iwl4965_mac_ht_tx_agg_start on da=%s"
4879 " tid=%d\n", print_mac(mac, da), tid);
4880
4881 /* Get index into station table */
4882 sta_id = iwl4965_hw_find_station(priv, da);
4883 if (sta_id == IWL_INVALID_STATION)
4884 return -ENXIO;
4885
4886 /* Find available Tx queue for aggregation */
4887 txq_id = iwl4965_txq_ctx_activate_free(priv);
4888 if (txq_id == -1)
4889 return -ENXIO;
4890
4891 spin_lock_irqsave(&priv->sta_lock, flags);
4892 tid_data = &priv->stations[sta_id].tid[tid];
4893
4894 /* Get starting sequence number for 1st frame in block ack window.
4895 * We'll use least signif byte as 1st frame's index into Tx queue. */
4896 ssn = SEQ_TO_SN(tid_data->seq_number);
4897 tid_data->agg.txq_id = txq_id;
4898 spin_unlock_irqrestore(&priv->sta_lock, flags);
4899
4900 *start_seq_num = ssn;
4901
4902 /* Update driver's link quality manager */
4903 iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE);
4904
4905 /* Set up and enable aggregation for selected Tx queue and FIFO */
4906 return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4907 sta_id, tid, ssn);
4908 }
4909
4910
4911 int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid,
4912 int generator)
4913 {
4914
4915 struct iwl4965_priv *priv = hw->priv;
4916 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4917 struct iwl4965_tid_data *tid_data;
4918 int rc;
4919 DECLARE_MAC_BUF(mac);
4920
4921 if (!da) {
4922 IWL_ERROR("%s: da = NULL\n", __func__);
4923 return -EINVAL;
4924 }
4925
4926 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4927 tx_fifo_id = default_tid_to_tx_fifo[tid];
4928 else
4929 return -EINVAL;
4930
4931 sta_id = iwl4965_hw_find_station(priv, da);
4932
4933 if (sta_id == IWL_INVALID_STATION)
4934 return -ENXIO;
4935
4936 tid_data = &priv->stations[sta_id].tid[tid];
4937 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4938 txq_id = tid_data->agg.txq_id;
4939
4940 rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4941 /* FIXME: need more safe way to handle error condition */
4942 if (rc)
4943 return rc;
4944
4945 iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA);
4946 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4947 print_mac(mac, da), tid);
4948
4949 return 0;
4950 }
4951
4952
4953 #endif /* CONFIG_IWL4965_HT_AGG */
4954 #endif /* CONFIG_IWL4965_HT */
4955
4956 /* Set up 4965-specific Rx frame reply handlers */
4957 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4958 {
4959 /* Legacy Rx frames */
4960 priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4961
4962 /* High-throughput (HT) Rx frames */
4963 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4964 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4965
4966 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4967 iwl4965_rx_missed_beacon_notif;
4968
4969 #ifdef CONFIG_IWL4965_HT
4970 #ifdef CONFIG_IWL4965_HT_AGG
4971 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4972 #endif /* CONFIG_IWL4965_HT_AGG */
4973 #endif /* CONFIG_IWL4965_HT */
4974 }
4975
4976 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4977 {
4978 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4979 INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4980 #ifdef CONFIG_IWL4965_SENSITIVITY
4981 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4982 #endif
4983 #ifdef CONFIG_IWL4965_HT
4984 #ifdef CONFIG_IWL4965_HT_AGG
4985 INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work);
4986 #endif /* CONFIG_IWL4965_HT_AGG */
4987 #endif /* CONFIG_IWL4965_HT */
4988 init_timer(&priv->statistics_periodic);
4989 priv->statistics_periodic.data = (unsigned long)priv;
4990 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4991 }
4992
4993 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4994 {
4995 del_timer_sync(&priv->statistics_periodic);
4996
4997 cancel_delayed_work(&priv->init_alive_start);
4998 }
4999
5000 struct pci_device_id iwl4965_hw_card_ids[] = {
5001 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
5002 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
5003 {0}
5004 };
5005
5006 /*
5007 * The device's EEPROM semaphore prevents conflicts between driver and uCode
5008 * when accessing the EEPROM; each access is a series of pulses to/from the
5009 * EEPROM chip, not a single event, so even reads could conflict if they
5010 * weren't arbitrated by the semaphore.
5011 */
5012 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
5013 {
5014 u16 count;
5015 int rc;
5016
5017 for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
5018 /* Request semaphore */
5019 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
5020 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
5021
5022 /* See if we got it */
5023 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
5024 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
5025 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
5026 EEPROM_SEM_TIMEOUT);
5027 if (rc >= 0) {
5028 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
5029 count+1);
5030 return rc;
5031 }
5032 }
5033
5034 return rc;
5035 }
5036
5037 inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
5038 {
5039 iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
5040 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
5041 }
5042
5043
5044 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
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