1 /******************************************************************************
3 * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
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.
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
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
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
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
25 *****************************************************************************/
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>
42 #include "iwl-helpers.h"
44 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv);
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 }
60 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
62 * If there isn't a valid next or previous rate then INV is used which
63 * maps to IWL_RATE_INVALID
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 */
82 static int is_fat_channel(__le32 rxon_flags)
84 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
85 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
88 static u8 is_single_stream(struct iwl4965_priv *priv)
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))
97 #endif /*CONFIG_IWL4965_HT */
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.
107 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv *priv,
108 u8 *idle_state, u8 *rx_state)
110 u8 is_single = is_single_stream(priv);
111 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
113 /* # of Rx chains to use when expecting MIMO. */
114 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
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;
125 case IWL_MIMO_PS_NONE:
126 *idle_state = (is_cam) ? *rx_state : 1;
136 int iwl4965_hw_rxq_stop(struct iwl4965_priv *priv)
141 spin_lock_irqsave(&priv->lock, flags);
142 rc = iwl4965_grab_nic_access(priv);
144 spin_unlock_irqrestore(&priv->lock, flags);
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,
153 IWL_ERROR("Can't stop Rx DMA.\n");
155 iwl4965_release_nic_access(priv);
156 spin_unlock_irqrestore(&priv->lock, flags);
161 u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *addr)
165 int ret = IWL_INVALID_STATION;
167 DECLARE_MAC_BUF(mac);
169 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
170 (priv->iw_mode == IEEE80211_IF_TYPE_AP))
173 if (is_broadcast_ether_addr(addr))
174 return IWL4965_BROADCAST_ID;
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) &&
180 (priv->stations[i].sta.sta.addr, addr))) {
185 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
186 print_mac(mac, addr), priv->num_stations);
189 spin_unlock_irqrestore(&priv->sta_lock, flags);
193 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv *priv, int pwr_max)
198 spin_lock_irqsave(&priv->lock, flags);
199 ret = iwl4965_grab_nic_access(priv);
201 spin_unlock_irqrestore(&priv->lock, flags);
208 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
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);
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);
220 iwl4965_release_nic_access(priv);
221 spin_unlock_irqrestore(&priv->lock, flags);
226 static int iwl4965_rx_init(struct iwl4965_priv *priv, struct iwl4965_rx_queue *rxq)
230 unsigned int rb_size;
232 spin_lock_irqsave(&priv->lock, flags);
233 rc = iwl4965_grab_nic_access(priv);
235 spin_unlock_irqrestore(&priv->lock, flags);
239 if (iwl4965_param_amsdu_size_8K)
240 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
242 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
245 iwl4965_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
247 /* Reset driver's Rx queue write index */
248 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
250 /* Tell device where to find RBD circular buffer in DRAM */
251 iwl4965_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
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);
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 |
265 (RX_QUEUE_SIZE_LOG <<
266 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
269 * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
272 iwl4965_release_nic_access(priv);
273 spin_unlock_irqrestore(&priv->lock, flags);
278 /* Tell 4965 where to find the "keep warm" buffer */
279 static int iwl4965_kw_init(struct iwl4965_priv *priv)
284 spin_lock_irqsave(&priv->lock, flags);
285 rc = iwl4965_grab_nic_access(priv);
289 iwl4965_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
290 priv->kw.dma_addr >> 4);
291 iwl4965_release_nic_access(priv);
293 spin_unlock_irqrestore(&priv->lock, flags);
297 static int iwl4965_kw_alloc(struct iwl4965_priv *priv)
299 struct pci_dev *dev = priv->pci_dev;
300 struct iwl4965_kw *kw = &priv->kw;
302 kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
303 kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
310 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
314 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
316 * Does not set up a command, or touch hardware.
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)
322 struct iwl4965_channel_info *ch_info;
324 ch_info = (struct iwl4965_channel_info *)
325 iwl4965_get_channel_info(priv, phymode, channel);
327 if (!is_channel_valid(ch_info))
330 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
331 " %ddBm): Ad-Hoc %ssupported\n",
333 is_channel_a_band(ch_info) ?
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),
342 eeprom_ch->max_power_avg,
343 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
344 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
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;
359 * iwl4965_kw_free - Free the "keep warm" buffer
361 static void iwl4965_kw_free(struct iwl4965_priv *priv)
363 struct pci_dev *dev = priv->pci_dev;
364 struct iwl4965_kw *kw = &priv->kw;
367 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
368 memset(kw, 0, sizeof(*kw));
373 * iwl4965_txq_ctx_reset - Reset TX queue context
374 * Destroys all DMA structures and initialise them again
379 static int iwl4965_txq_ctx_reset(struct iwl4965_priv *priv)
382 int txq_id, slots_num;
385 iwl4965_kw_free(priv);
387 /* Free all tx/cmd queues and keep-warm buffer */
388 iwl4965_hw_txq_ctx_free(priv);
390 /* Alloc keep-warm buffer */
391 rc = iwl4965_kw_alloc(priv);
393 IWL_ERROR("Keep Warm allocation failed");
397 spin_lock_irqsave(&priv->lock, flags);
399 rc = iwl4965_grab_nic_access(priv);
401 IWL_ERROR("TX reset failed");
402 spin_unlock_irqrestore(&priv->lock, flags);
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);
411 /* Tell 4965 where to find the keep-warm buffer */
412 rc = iwl4965_kw_init(priv);
414 IWL_ERROR("kw_init failed\n");
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,
426 IWL_ERROR("Tx %d queue init failed\n", txq_id);
434 iwl4965_hw_txq_ctx_free(priv);
436 iwl4965_kw_free(priv);
441 int iwl4965_hw_nic_init(struct iwl4965_priv *priv)
445 struct iwl4965_rx_queue *rxq = &priv->rxq;
450 iwl4965_power_init_handle(priv);
453 spin_lock_irqsave(&priv->lock, flags);
455 iwl4965_set_bit(priv, CSR_GIO_CHICKEN_BITS,
456 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
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);
463 spin_unlock_irqrestore(&priv->lock, flags);
464 IWL_DEBUG_INFO("Failed to init the card\n");
468 rc = iwl4965_grab_nic_access(priv);
470 spin_unlock_irqrestore(&priv->lock, flags);
474 iwl4965_read_prph(priv, APMG_CLK_CTRL_REG);
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);
483 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
484 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
486 iwl4965_release_nic_access(priv);
487 iwl4965_write32(priv, CSR_INT_COALESCING, 512 / 32);
488 spin_unlock_irqrestore(&priv->lock, flags);
490 /* Determine HW type */
491 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
495 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
497 iwl4965_nic_set_pwr_src(priv, 1);
498 spin_lock_irqsave(&priv->lock, flags);
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,
507 spin_unlock_irqrestore(&priv->lock, flags);
509 /* Read the EEPROM */
510 rc = iwl4965_eeprom_init(priv);
514 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
515 IWL_ERROR("Older EEPROM detected! Aborting.\n");
519 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
521 /* disable L1 entry -- workaround for pre-B1 */
522 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
524 spin_lock_irqsave(&priv->lock, flags);
526 /* set CSR_HW_CONFIG_REG for uCode use */
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);
532 rc = iwl4965_grab_nic_access(priv);
534 spin_unlock_irqrestore(&priv->lock, flags);
535 IWL_DEBUG_INFO("Failed to init the card\n");
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);
543 iwl4965_clear_bits_prph(priv, APMG_PS_CTRL_REG,
544 APMG_PS_CTRL_VAL_RESET_REQ);
546 iwl4965_release_nic_access(priv);
547 spin_unlock_irqrestore(&priv->lock, flags);
549 iwl4965_hw_card_show_info(priv);
553 /* Allocate the RX queue, or reset if it is already allocated */
555 rc = iwl4965_rx_queue_alloc(priv);
557 IWL_ERROR("Unable to initialize Rx queue\n");
561 iwl4965_rx_queue_reset(priv, rxq);
563 iwl4965_rx_replenish(priv);
565 iwl4965_rx_init(priv, rxq);
567 spin_lock_irqsave(&priv->lock, flags);
569 rxq->need_update = 1;
570 iwl4965_rx_queue_update_write_ptr(priv, rxq);
572 spin_unlock_irqrestore(&priv->lock, flags);
574 /* Allocate and init all Tx and Command queues */
575 rc = iwl4965_txq_ctx_reset(priv);
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");
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");
585 set_bit(STATUS_INIT, &priv->status);
590 int iwl4965_hw_nic_stop_master(struct iwl4965_priv *priv)
596 spin_lock_irqsave(&priv->lock, flags);
598 /* set stop master bit */
599 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
601 reg_val = iwl4965_read32(priv, CSR_GP_CNTRL);
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 "
608 rc = iwl4965_poll_bit(priv, CSR_RESET,
609 CSR_RESET_REG_FLAG_MASTER_DISABLED,
610 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
612 spin_unlock_irqrestore(&priv->lock, flags);
617 spin_unlock_irqrestore(&priv->lock, flags);
618 IWL_DEBUG_INFO("stop master\n");
624 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
626 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv *priv)
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);
640 iwl4965_write_direct32(priv,
641 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
643 iwl4965_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
644 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
646 iwl4965_release_nic_access(priv);
647 spin_unlock_irqrestore(&priv->lock, flags);
650 /* Deallocate memory for all Tx queues */
651 iwl4965_hw_txq_ctx_free(priv);
654 int iwl4965_hw_nic_reset(struct iwl4965_priv *priv)
659 iwl4965_hw_nic_stop_master(priv);
661 spin_lock_irqsave(&priv->lock, flags);
663 iwl4965_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
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);
674 rc = iwl4965_grab_nic_access(priv);
676 iwl4965_write_prph(priv, APMG_CLK_EN_REG,
677 APMG_CLK_VAL_DMA_CLK_RQT |
678 APMG_CLK_VAL_BSM_CLK_RQT);
682 iwl4965_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
683 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
685 iwl4965_release_nic_access(priv);
688 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
689 wake_up_interruptible(&priv->wait_command_queue);
691 spin_unlock_irqrestore(&priv->lock, flags);
697 #define REG_RECALIB_PERIOD (60)
700 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
702 * This callback is provided in order to queue the statistics_work
703 * in work_queue context (v. softirq)
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.
713 static void iwl4965_bg_statistics_periodic(unsigned long data)
715 struct iwl4965_priv *priv = (struct iwl4965_priv *)data;
717 queue_work(priv->workqueue, &priv->statistics_work);
721 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
723 * This is queued by iwl4965_bg_statistics_periodic.
725 static void iwl4965_bg_statistics_work(struct work_struct *work)
727 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
730 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
733 mutex_lock(&priv->mutex);
734 iwl4965_send_statistics_request(priv);
735 mutex_unlock(&priv->mutex);
738 #define CT_LIMIT_CONST 259
739 #define TM_CT_KILL_THRESHOLD 110
741 void iwl4965_rf_kill_ct_config(struct iwl4965_priv *priv)
743 struct iwl4965_ct_kill_config cmd;
746 u32 crit_temperature;
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);
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]);
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]);
765 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
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);
772 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
774 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
777 #ifdef CONFIG_IWL4965_SENSITIVITY
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
787 static int iwl4965_sens_energy_cck(struct iwl4965_priv *priv,
790 struct statistics_general_data *rx_info)
794 u8 max_silence_rssi = 0;
796 u8 silence_rssi_a = 0;
797 u8 silence_rssi_b = 0;
798 u8 silence_rssi_c = 0;
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:
807 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
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;
815 data = &(priv->sensitivity_data);
817 data->nrg_auto_corr_silence_diff = 0;
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);
829 val = max(silence_rssi_b, silence_rssi_c);
830 max_silence_rssi = max(silence_rssi_a, (u8) val);
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;
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);
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,
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);
854 data->nrg_energy_idx++;
855 if (data->nrg_energy_idx >= 10)
856 data->nrg_energy_idx = 0;
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]));
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);
871 /* Count number of consecutive beacons with fewer-than-desired
873 if (false_alarms < min_false_alarms)
874 data->num_in_cck_no_fa++;
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);
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;
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;
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
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;
902 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
903 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
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);
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;
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 -
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);
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
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))) {
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);
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);
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);
945 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
947 /* Else we got a healthy number of false alarms, keep status quo */
949 IWL_DEBUG_CALIB(" FA in safe zone\n");
950 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
952 /* Store for use in "fewer than desired" with later beacon */
953 data->nrg_silence_ref = silence_ref;
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;
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()!
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);
972 data->nrg_prev_state = data->nrg_curr_state;
978 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv *priv,
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;
988 data = &(priv->sensitivity_data);
990 /* If we got too many false alarms this time, reduce sensitivity */
991 if (false_alarms > max_false_alarms) {
993 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
994 false_alarms, max_false_alarms);
996 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
997 data->auto_corr_ofdm =
998 min((u32)AUTO_CORR_MAX_OFDM, val);
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);
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);
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);
1013 /* Else if we got fewer than desired, increase sensitivity */
1014 else if (false_alarms < min_false_alarms) {
1016 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1017 false_alarms, min_false_alarms);
1019 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1020 data->auto_corr_ofdm =
1021 max((u32)AUTO_CORR_MIN_OFDM, val);
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);
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);
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);
1037 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1038 min_false_alarms, false_alarms, max_false_alarms);
1043 static int iwl4965_sensitivity_callback(struct iwl4965_priv *priv,
1044 struct iwl4965_cmd *cmd, struct sk_buff *skb)
1046 /* We didn't cache the SKB; let the caller free it */
1050 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1051 static int iwl4965_sensitivity_write(struct iwl4965_priv *priv, u8 flags)
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,
1063 data = &(priv->sensitivity_data);
1065 memset(&cmd, 0, sizeof(cmd));
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);
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);
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);
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);
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,
1098 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1099 data->auto_corr_cck, data->auto_corr_cck_mrc,
1102 /* Update uCode's "work" table, and copy it to DSP */
1103 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1105 if (flags & CMD_ASYNC)
1106 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
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");
1115 /* Copy table for comparison next time */
1116 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1117 sizeof(u16)*HD_TABLE_SIZE);
1119 rc = iwl4965_send_cmd(priv, &cmd_out);
1121 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1128 void iwl4965_init_sensitivity(struct iwl4965_priv *priv, u8 flags, u8 force)
1132 struct iwl4965_sensitivity_data *data = NULL;
1134 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1137 memset(&(priv->sensitivity_tbl[0]), 0,
1138 sizeof(u16)*HD_TABLE_SIZE);
1140 /* Clear driver's sensitivity algo data */
1141 data = &(priv->sensitivity_data);
1142 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
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;
1151 for (i = 0; i < 10; i++)
1152 data->nrg_value[i] = 0;
1154 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1155 data->nrg_silence_rssi[i] = 0;
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;
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;
1171 /* Clear prior Sensitivity command data to force send to uCode */
1173 memset(&(priv->sensitivity_tbl[0]), 0,
1174 sizeof(u16)*HD_TABLE_SIZE);
1176 rc |= iwl4965_sensitivity_write(priv, flags);
1177 IWL_DEBUG_CALIB("<<return 0x%X\n", rc);
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)
1188 struct iwl4965_chain_noise_data *data = NULL;
1191 data = &(priv->chain_noise_data);
1192 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl4965_is_associated(priv)) {
1193 struct iwl4965_calibration_cmd cmd;
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,
1203 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1204 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
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.
1215 static void iwl4965_noise_calibration(struct iwl4965_priv *priv,
1216 struct iwl4965_notif_statistics *stat_resp)
1218 struct iwl4965_chain_noise_data *data = NULL;
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;
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);
1240 data = &(priv->chain_noise_data);
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");
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);
1257 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1258 chan_num = le16_to_cpu(priv->staging_rxon.channel);
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",
1267 spin_unlock_irqrestore(&priv->lock, flags);
1271 /* Accumulate beacon statistics values across 20 beacons */
1272 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1274 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1276 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
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;
1283 spin_unlock_irqrestore(&priv->lock, flags);
1285 data->beacon_count++;
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);
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);
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);
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) {
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;
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);
1317 max_average_sig = average_sig[1];
1318 max_average_sig_antenna_i = 1;
1319 active_chains = (1 << max_average_sig_antenna_i);
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);
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);
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 -
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;
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]);
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");
1361 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1364 /* Save for use within RXON, TX, SCAN commands, etc. */
1365 priv->valid_antenna = active_chains;
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);
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;
1382 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1384 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1385 average_noise[0], average_noise[1],
1388 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1389 min_average_noise, min_average_noise_antenna_i);
1391 for (i = 0; i < NUM_RX_CHAINS; i++) {
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 *
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;
1405 data->delta_gain_code[i] =
1406 (data->delta_gain_code[i] | (1 << 2));
1408 data->delta_gain_code[i] = 0;
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]);
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;
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,
1428 IWL_DEBUG_CALIB("fail sending cmd "
1429 "REPLY_PHY_CALIBRATION_CMD \n");
1431 /* TODO we might want recalculate
1432 * rx_chain in rxon cmd */
1434 /* Mark so we run this algo only once! */
1435 data->state = IWL_CHAIN_NOISE_CALIBRATED;
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;
1448 static void iwl4965_sensitivity_calibration(struct iwl4965_priv *priv,
1449 struct iwl4965_notif_statistics *resp)
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;
1465 data = &(priv->sensitivity_data);
1467 if (!iwl4965_is_associated(priv)) {
1468 IWL_DEBUG_CALIB("<< - not associated\n");
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);
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);
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);
1499 spin_unlock_irqrestore(&priv->lock, flags);
1501 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1503 if (!rx_enable_time) {
1504 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
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;
1514 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1515 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1518 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1519 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1521 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1522 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1525 if (data->last_fa_cnt_ofdm > fa_ofdm)
1526 data->last_fa_cnt_ofdm = fa_ofdm;
1528 fa_ofdm -= data->last_fa_cnt_ofdm;
1529 data->last_fa_cnt_ofdm += fa_ofdm;
1532 if (data->last_fa_cnt_cck > fa_cck)
1533 data->last_fa_cnt_cck = fa_cck;
1535 fa_cck -= data->last_fa_cnt_cck;
1536 data->last_fa_cnt_cck += fa_cck;
1539 /* Total aborted signal locks */
1540 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1541 norm_fa_cck = fa_cck + bad_plcp_cck;
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);
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);
1553 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1555 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
1558 mutex_lock(&priv->mutex);
1560 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1561 test_bit(STATUS_SCANNING, &priv->status)) {
1562 mutex_unlock(&priv->mutex);
1566 if (priv->start_calib) {
1567 iwl4965_noise_calibration(priv, &priv->statistics);
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;
1574 iwl4965_sensitivity_calibration(priv,
1578 mutex_unlock(&priv->mutex);
1581 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1583 static void iwl4965_bg_txpower_work(struct work_struct *work)
1585 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
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))
1596 mutex_lock(&priv->mutex);
1598 /* Regardless of if we are assocaited, we must reconfigure the
1599 * TX power since frames can be sent on non-radar channels while
1601 iwl4965_hw_reg_send_txpower(priv);
1603 /* Update last_temperature to keep is_calib_needed from running
1604 * when it isn't needed... */
1605 priv->last_temperature = priv->temperature;
1607 mutex_unlock(&priv->mutex);
1611 * Acquire priv->lock before calling this function !
1613 static void iwl4965_set_wr_ptrs(struct iwl4965_priv *priv, int txq_id, u32 index)
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);
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
1625 * NOTE: Acquire priv->lock before calling this function !
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)
1631 int txq_id = txq->q.id;
1633 /* Find out whether to activate Tx queue */
1634 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
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);
1644 txq->sched_retry = scd_retry;
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);
1651 static const u16 default_queue_to_tx_fifo[] = {
1661 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv *priv, int txq_id)
1663 set_bit(txq_id, &priv->txq_ctx_active_msk);
1666 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv *priv, int txq_id)
1668 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1671 int iwl4965_alive_notify(struct iwl4965_priv *priv)
1675 unsigned long flags;
1678 spin_lock_irqsave(&priv->lock, flags);
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);
1691 spin_unlock_irqrestore(&priv->lock, flags);
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);
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);
1710 /* Disable chain mode for all queues */
1711 iwl4965_write_prph(priv, KDR_SCD_QUEUECHAIN_SEL, 0);
1713 /* Initialize each Tx queue (including the command queue) */
1714 for (i = 0; i < priv->hw_setting.max_txq_num; i++) {
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));
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),
1724 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1725 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1728 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
1729 SCD_CONTEXT_QUEUE_OFFSET(i) +
1732 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1733 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1736 iwl4965_write_prph(priv, KDR_SCD_INTERRUPT_MASK,
1737 (1 << priv->hw_setting.max_txq_num) - 1);
1739 /* Activate all Tx DMA/FIFO channels */
1740 iwl4965_write_prph(priv, KDR_SCD_TXFACT,
1741 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1743 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
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);
1752 iwl4965_release_nic_access(priv);
1753 spin_unlock_irqrestore(&priv->lock, flags);
1759 * iwl4965_hw_set_hw_setting
1761 * Called when initializing driver
1763 int iwl4965_hw_set_hw_setting(struct iwl4965_priv *priv)
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);
1771 if (!priv->hw_setting.shared_virt)
1774 memset(priv->hw_setting.shared_virt, 0, sizeof(struct iwl4965_shared));
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;
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;
1792 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1794 * Destroy all TX DMA queues and structures
1796 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv *priv)
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]);
1804 /* Keep-warm buffer */
1805 iwl4965_kw_free(priv);
1809 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1811 * Does NOT advance any TFD circular buffer read/write indexes
1812 * Does NOT free the TFD itself (which is within circular buffer)
1814 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
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;
1823 /* Host command buffers stay mapped in memory, nothing to clean */
1824 if (txq->q.id == IWL_CMD_QUEUE_NUM)
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 */
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++) {
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),
1851 pci_unmap_single(dev,
1852 le32_to_cpu(bd->pa[index].tb1_addr),
1853 IWL_GET_BITS(bd->pa[index], tb1_len),
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];
1861 txq->txb[txq->q.read_ptr].skb[i] = NULL;
1867 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv *priv, s8 power)
1869 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1873 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1886 *res = ((num * 2 + denom) / (denom * 2)) * sign;
1892 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
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.
1899 * Voltage indication is higher for lower voltage.
1900 * Lower voltage requires more gain (lower gain table index).
1902 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1903 s32 current_voltage)
1907 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1908 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1911 iwl4965_math_div_round(current_voltage - eeprom_voltage,
1912 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1914 if (current_voltage > eeprom_voltage)
1916 if ((comp < -2) || (comp > 2))
1922 static const struct iwl4965_channel_info *
1923 iwl4965_get_channel_txpower_info(struct iwl4965_priv *priv, u8 phymode, u16 channel)
1925 const struct iwl4965_channel_info *ch_info;
1927 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
1929 if (!is_channel_valid(ch_info))
1935 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1937 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1938 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1939 return CALIB_CH_GROUP_5;
1941 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1942 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1943 return CALIB_CH_GROUP_1;
1945 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1946 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1947 return CALIB_CH_GROUP_2;
1949 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1950 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1951 return CALIB_CH_GROUP_3;
1953 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1954 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1955 return CALIB_CH_GROUP_4;
1957 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1961 static u32 iwl4965_get_sub_band(const struct iwl4965_priv *priv, u32 channel)
1965 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1966 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
1969 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
1970 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
1977 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1984 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1990 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
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.
1997 static int iwl4965_interpolate_chan(struct iwl4965_priv *priv, u32 channel,
1998 struct iwl4965_eeprom_calib_ch_info *chan_info)
2003 const struct iwl4965_eeprom_calib_measure *m1;
2004 const struct iwl4965_eeprom_calib_measure *m2;
2005 struct iwl4965_eeprom_calib_measure *omeas;
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);
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;
2019 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2020 channel, s, ch_i1, ch_i2);
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]);
2031 (u8) iwl4965_interpolate_value(channel, ch_i1,
2036 (u8) iwl4965_interpolate_value(channel, ch_i1,
2037 m1->gain_idx, ch_i2,
2039 omeas->temperature =
2040 (u8) iwl4965_interpolate_value(channel, ch_i1,
2045 (s8) iwl4965_interpolate_value(channel, ch_i1,
2050 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2051 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2053 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2054 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2056 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2057 m1->pa_det, m2->pa_det, omeas->pa_det);
2059 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2060 m1->temperature, m2->temperature,
2061 omeas->temperature);
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 */
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 */
2091 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2094 if ((rate_power_index & 7) <= 4)
2095 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2097 return MIN_TX_GAIN_INDEX;
2105 static const struct gain_entry gain_table[2][108] = {
2106 /* 5.2GHz power gain index table */
2108 {123, 0x3F}, /* highest txpower */
2217 /* 2.4GHz power gain index table */
2219 {110, 0x3f}, /* highest txpower */
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)
2334 u8 saturation_power;
2336 s32 user_target_power;
2340 s32 current_regulatory;
2341 s32 txatten_grp = CALIB_CH_GROUP_MAX;
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;
2349 s32 voltage_compensation;
2350 s32 degrees_per_05db_num;
2351 s32 degrees_per_05db_denom;
2353 s32 temperature_comp[2];
2354 s32 factory_gain_index[2];
2355 s32 factory_actual_pwr[2];
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);
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);
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;
2374 /* Get current (RXON) channel, band, width */
2376 iwl4965_get_channel_txpower_info(priv, priv->phymode, channel);
2378 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
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)
2390 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2391 channel, txatten_grp);
2400 /* hardware txpower limits ...
2401 * saturation (clipping distortion) txpowers are in half-dBm */
2403 saturation_power = priv->eeprom.calib_info.saturation_power24;
2405 saturation_power = priv->eeprom.calib_info.saturation_power52;
2407 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2408 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2410 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2412 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2415 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2416 * max_power_avg values are in dBm, convert * 2 */
2418 reg_limit = ch_info->fat_max_power_avg * 2;
2420 reg_limit = ch_info->max_power_avg * 2;
2422 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2423 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2425 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2427 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
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);
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);
2440 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2442 voltage, voltage_compensation);
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);
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;
2456 /* get per-chain txpower values from factory measurements */
2457 for (c = 0; c < 2; c++) {
2458 measurement = &ch_eeprom_info.measurements[c][1];
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]);
2468 factory_gain_index[c] = measurement->gain_idx;
2469 factory_actual_pwr[c] = measurement->actual_pow;
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]);
2477 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2478 factory_gain_index[c],
2479 factory_actual_pwr[c]);
2482 /* for each of 33 bit-rates (including 1 for CCK) */
2483 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2485 union iwl4965_tx_power_dual_stream tx_power;
2487 /* for mimo, reduce each chain's txpower by half
2488 * (3dB, 6 steps), so total output power is regulatory
2491 current_regulatory = reg_limit -
2492 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2495 current_regulatory = reg_limit;
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;
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;
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,
2515 /* for each of 2 Tx chains (radio transmitters) */
2516 for (c = 0; c < 2; c++) {
2521 (s32)le32_to_cpu(priv->card_alive_init.
2522 tx_atten[txatten_grp][c]);
2526 /* calculate index; higher index means lower txpower */
2527 power_index = (u8) (factory_gain_index[c] -
2529 factory_actual_pwr[c]) -
2530 temperature_comp[c] -
2531 voltage_compensation +
2534 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2537 if (power_index < get_min_power_index(i, band))
2538 power_index = get_min_power_index(i, band);
2540 /* adjust 5 GHz index to support negative indexes */
2544 /* CCK, rate 32, reduce txpower for CCK */
2545 if (i == POWER_TABLE_CCK_ENTRY)
2547 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2549 /* stay within the table! */
2550 if (power_index > 107) {
2551 IWL_WARNING("txpower index %d > 107\n",
2555 if (power_index < 0) {
2556 IWL_WARNING("txpower index %d < 0\n",
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;
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 */
2574 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2576 }/* for each rate */
2582 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2584 * Uses the active RXON for channel, band, and characteristics (fat, high)
2585 * The power limit is taken from priv->user_txpower_limit.
2587 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv *priv)
2589 struct iwl4965_txpowertable_cmd cmd = { 0 };
2593 u8 ctrl_chan_high = 0;
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
2599 IWL_WARNING("TX Power requested while scanning!\n");
2603 band = ((priv->phymode == MODE_IEEE80211B) ||
2604 (priv->phymode == MODE_IEEE80211G));
2606 is_fat = is_fat_channel(priv->active_rxon.flags);
2609 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2613 cmd.channel = priv->active_rxon.channel;
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);
2621 rc = iwl4965_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2625 int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel)
2630 u8 ctrl_chan_high = 0;
2631 struct iwl4965_channel_switch_cmd cmd = { 0 };
2632 const struct iwl4965_channel_info *ch_info;
2634 band = ((priv->phymode == MODE_IEEE80211B) ||
2635 (priv->phymode == MODE_IEEE80211G));
2637 ch_info = iwl4965_get_channel_info(priv, priv->phymode, channel);
2639 is_fat = is_fat_channel(priv->staging_rxon.flags);
2642 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
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);
2652 cmd.expect_beacon = is_channel_radar(ch_info);
2654 cmd.expect_beacon = 1;
2656 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2657 ctrl_chan_high, &cmd.tx_power);
2659 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2663 rc = iwl4965_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2667 #define RTS_HCCA_RETRY_LIMIT 3
2668 #define RTS_DFAULT_RETRY_LIMIT 60
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,
2677 u8 rts_retry_limit = 0;
2678 u8 data_retry_limit = 0;
2680 u16 fc = le16_to_cpu(hdr->frame_control);
2682 tx_flags = cmd->cmd.tx.tx_flags;
2684 rate = iwl4965_rates[ctrl->tx_rate].plcp;
2686 rts_retry_limit = (is_hcca) ?
2687 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
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;
2694 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2696 if (priv->data_retry_limit != -1)
2697 data_retry_limit = priv->data_retry_limit;
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;
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;
2721 int iwl4965_hw_get_rx_read(struct iwl4965_priv *priv)
2723 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2725 return IWL_GET_BITS(*shared_data, rb_closed_stts_rb_num);
2728 int iwl4965_hw_get_temperature(struct iwl4965_priv *priv)
2730 return priv->temperature;
2733 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv *priv,
2734 struct iwl4965_frame *frame, u8 rate)
2736 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2737 unsigned int frame_size;
2739 tx_beacon_cmd = &frame->u.beacon;
2740 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2742 tx_beacon_cmd->tx.sta_id = IWL4965_BROADCAST_ID;
2743 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
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));
2750 BUG_ON(frame_size > MAX_MPDU_SIZE);
2751 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
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);
2757 tx_beacon_cmd->tx.rate_n_flags =
2758 iwl4965_hw_set_rate_n_flags(rate, 0);
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);
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.
2769 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2770 * channels supported in hardware.
2772 int iwl4965_hw_tx_queue_init(struct iwl4965_priv *priv, struct iwl4965_tx_queue *txq)
2775 unsigned long flags;
2776 int txq_id = txq->q.id;
2778 spin_lock_irqsave(&priv->lock, flags);
2779 rc = iwl4965_grab_nic_access(priv);
2781 spin_unlock_irqrestore(&priv->lock, flags);
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);
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);
2800 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv *priv, void *ptr,
2801 dma_addr_t addr, u16 len)
2804 struct iwl4965_tfd_frame *tfd = ptr;
2805 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2807 /* Each TFD can point to a maximum 20 Tx buffers */
2808 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2809 IWL_ERROR("Error can not send more than %d chunks\n",
2814 index = num_tbs / 2;
2815 is_odd = num_tbs & 0x1;
2818 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2819 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2820 iwl_get_dma_hi_address(addr));
2821 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2823 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2824 (u32) (addr & 0xffff));
2825 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2826 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2829 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2834 static void iwl4965_hw_card_show_info(struct iwl4965_priv *priv)
2836 u16 hw_version = priv->eeprom.board_revision_4965;
2838 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2839 ((hw_version >> 8) & 0x0F),
2840 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
2842 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2843 priv->eeprom.board_pba_number_4965);
2846 #define IWL_TX_CRC_SIZE 4
2847 #define IWL_TX_DELIMITER_SIZE 4
2850 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2852 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv *priv,
2853 struct iwl4965_tx_queue *txq, u16 byte_cnt)
2856 int txq_id = txq->q.id;
2857 struct iwl4965_shared *shared_data = priv->hw_setting.shared_virt;
2859 if (txq->need_update == 0)
2862 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2864 /* Set up byte count within first 256 entries */
2865 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2866 tfd_offset[txq->q.write_ptr], byte_cnt, len);
2868 /* If within first 64 entries, duplicate at end */
2869 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
2870 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2871 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
2878 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2880 * Selects how many and which Rx receivers/antennas/chains to use.
2881 * This should not be used for scan command ... it puts data in wrong place.
2883 void iwl4965_set_rxon_chain(struct iwl4965_priv *priv)
2885 u8 is_single = is_single_stream(priv);
2886 u8 idle_state, rx_state;
2888 priv->staging_rxon.rx_chain = 0;
2889 rx_state = idle_state = 3;
2891 /* Tell uCode which antennas are actually connected.
2892 * Before first association, we assume all antennas are connected.
2893 * Just after first association, iwl4965_noise_calibration()
2894 * checks which antennas actually *are* connected. */
2895 priv->staging_rxon.rx_chain |=
2896 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
2898 /* How many receivers should we use? */
2899 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
2900 priv->staging_rxon.rx_chain |=
2901 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
2902 priv->staging_rxon.rx_chain |=
2903 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
2905 if (!is_single && (rx_state >= 2) &&
2906 !test_bit(STATUS_POWER_PMI, &priv->status))
2907 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
2909 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
2911 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
2914 #ifdef CONFIG_IWL4965_HT
2915 #ifdef CONFIG_IWL4965_HT_AGG
2917 get the traffic load value for tid
2919 static u32 iwl4965_tl_get_load(struct iwl4965_priv *priv, u8 tid)
2922 u32 current_time = jiffies_to_msecs(jiffies);
2925 unsigned long flags;
2926 struct iwl4965_traffic_load *tid_ptr = NULL;
2928 if (tid >= TID_MAX_LOAD_COUNT)
2931 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2933 current_time -= current_time % TID_ROUND_VALUE;
2935 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2936 if (!(tid_ptr->queue_count))
2939 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2940 index = time_diff / TID_QUEUE_CELL_SPACING;
2942 if (index >= TID_QUEUE_MAX_SIZE) {
2943 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2945 while (tid_ptr->queue_count &&
2946 (tid_ptr->time_stamp < oldest_time)) {
2947 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
2948 tid_ptr->packet_count[tid_ptr->head] = 0;
2949 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
2950 tid_ptr->queue_count--;
2952 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
2956 load = tid_ptr->total;
2959 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
2964 increment traffic load value for tid and also remove
2965 any old values if passed the certian time period
2967 static void iwl4965_tl_add_packet(struct iwl4965_priv *priv, u8 tid)
2969 u32 current_time = jiffies_to_msecs(jiffies);
2972 unsigned long flags;
2973 struct iwl4965_traffic_load *tid_ptr = NULL;
2975 if (tid >= TID_MAX_LOAD_COUNT)
2978 tid_ptr = &(priv->lq_mngr.agg_ctrl.traffic_load[tid]);
2980 current_time -= current_time % TID_ROUND_VALUE;
2982 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
2983 if (!(tid_ptr->queue_count)) {
2985 tid_ptr->time_stamp = current_time;
2986 tid_ptr->queue_count = 1;
2988 tid_ptr->packet_count[0] = 1;
2992 time_diff = TIME_WRAP_AROUND(tid_ptr->time_stamp, current_time);
2993 index = time_diff / TID_QUEUE_CELL_SPACING;
2995 if (index >= TID_QUEUE_MAX_SIZE) {
2996 u32 oldest_time = current_time - TID_MAX_TIME_DIFF;
2998 while (tid_ptr->queue_count &&
2999 (tid_ptr->time_stamp < oldest_time)) {
3000 tid_ptr->total -= tid_ptr->packet_count[tid_ptr->head];
3001 tid_ptr->packet_count[tid_ptr->head] = 0;
3002 tid_ptr->time_stamp += TID_QUEUE_CELL_SPACING;
3003 tid_ptr->queue_count--;
3005 if (tid_ptr->head >= TID_QUEUE_MAX_SIZE)
3010 index = (tid_ptr->head + index) % TID_QUEUE_MAX_SIZE;
3011 tid_ptr->packet_count[index] = tid_ptr->packet_count[index] + 1;
3012 tid_ptr->total = tid_ptr->total + 1;
3014 if ((index + 1) > tid_ptr->queue_count)
3015 tid_ptr->queue_count = index + 1;
3017 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3021 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7
3023 BA_STATUS_FAILURE = 0,
3024 BA_STATUS_INITIATOR_DELBA,
3025 BA_STATUS_RECIPIENT_DELBA,
3026 BA_STATUS_RENEW_ADDBA_REQUEST,
3031 * iwl4964_tl_ba_avail - Find out if an unused aggregation queue is available
3033 static u8 iwl4964_tl_ba_avail(struct iwl4965_priv *priv)
3036 struct iwl4965_lq_mngr *lq;
3040 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3042 /* Find out how many agg queues are in use */
3043 for (i = 0; i < TID_MAX_LOAD_COUNT ; i++) {
3045 if ((lq->agg_ctrl.granted_ba & msk) ||
3046 (lq->agg_ctrl.wait_for_agg_status & msk))
3050 if (count < MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS)
3056 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3057 u8 tid, enum HT_STATUS status);
3059 static int iwl4965_perform_addba(struct iwl4965_priv *priv, u8 tid, u32 length,
3064 rc = ieee80211_start_BA_session(priv->hw, priv->bssid, tid);
3066 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3071 static int iwl4965_perform_delba(struct iwl4965_priv *priv, u8 tid)
3075 rc = ieee80211_stop_BA_session(priv->hw, priv->bssid, tid);
3077 iwl4965_ba_status(priv, tid, BA_STATUS_FAILURE);
3082 static void iwl4965_turn_on_agg_for_tid(struct iwl4965_priv *priv,
3083 struct iwl4965_lq_mngr *lq,
3084 u8 auto_agg, u8 tid)
3086 u32 tid_msk = (1 << tid);
3087 unsigned long flags;
3089 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3091 if ((auto_agg) && (!lq->enable_counter)){
3092 lq->agg_ctrl.next_retry = 0;
3093 lq->agg_ctrl.tid_retry = 0;
3094 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3098 if (!(lq->agg_ctrl.granted_ba & tid_msk) &&
3099 (lq->agg_ctrl.requested_ba & tid_msk)) {
3100 u8 available_queues;
3103 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3104 available_queues = iwl4964_tl_ba_avail(priv);
3105 load = iwl4965_tl_get_load(priv, tid);
3107 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3108 if (!available_queues) {
3110 lq->agg_ctrl.tid_retry |= tid_msk;
3112 lq->agg_ctrl.requested_ba &= ~tid_msk;
3113 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3115 } else if ((auto_agg) &&
3116 ((load <= lq->agg_ctrl.tid_traffic_load_threshold) ||
3117 ((lq->agg_ctrl.wait_for_agg_status & tid_msk))))
3118 lq->agg_ctrl.tid_retry |= tid_msk;
3120 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3121 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3122 iwl4965_perform_addba(priv, tid, 0x40,
3123 lq->agg_ctrl.ba_timeout);
3124 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3127 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3130 static void iwl4965_turn_on_agg(struct iwl4965_priv *priv, u8 tid)
3132 struct iwl4965_lq_mngr *lq;
3133 unsigned long flags;
3135 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3137 if ((tid < TID_MAX_LOAD_COUNT))
3138 iwl4965_turn_on_agg_for_tid(priv, lq, lq->agg_ctrl.auto_agg,
3140 else if (tid == TID_ALL_SPECIFIED) {
3141 if (lq->agg_ctrl.requested_ba) {
3142 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++)
3143 iwl4965_turn_on_agg_for_tid(priv, lq,
3144 lq->agg_ctrl.auto_agg, tid);
3146 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3147 lq->agg_ctrl.tid_retry = 0;
3148 lq->agg_ctrl.next_retry = 0;
3149 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3155 void iwl4965_turn_off_agg(struct iwl4965_priv *priv, u8 tid)
3158 struct iwl4965_lq_mngr *lq;
3159 unsigned long flags;
3161 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3163 if ((tid < TID_MAX_LOAD_COUNT)) {
3165 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3166 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3167 lq->agg_ctrl.requested_ba &= ~tid_msk;
3168 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3169 iwl4965_perform_delba(priv, tid);
3170 } else if (tid == TID_ALL_SPECIFIED) {
3171 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3172 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3174 lq->agg_ctrl.wait_for_agg_status |= tid_msk;
3175 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3176 iwl4965_perform_delba(priv, tid);
3177 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3179 lq->agg_ctrl.requested_ba = 0;
3180 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3185 * iwl4965_ba_status - Update driver's link quality mgr with tid's HT status
3187 static void iwl4965_ba_status(struct iwl4965_priv *priv,
3188 u8 tid, enum HT_STATUS status)
3190 struct iwl4965_lq_mngr *lq;
3191 u32 tid_msk = (1 << tid);
3192 unsigned long flags;
3194 lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3196 if ((tid >= TID_MAX_LOAD_COUNT))
3199 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3201 case BA_STATUS_ACTIVE:
3202 if (!(lq->agg_ctrl.granted_ba & tid_msk))
3203 lq->agg_ctrl.granted_ba |= tid_msk;
3206 if ((lq->agg_ctrl.granted_ba & tid_msk))
3207 lq->agg_ctrl.granted_ba &= ~tid_msk;
3211 lq->agg_ctrl.wait_for_agg_status &= ~tid_msk;
3212 if (status != BA_STATUS_ACTIVE) {
3213 if (lq->agg_ctrl.auto_agg) {
3214 lq->agg_ctrl.tid_retry |= tid_msk;
3215 lq->agg_ctrl.next_retry =
3216 jiffies + msecs_to_jiffies(500);
3218 lq->agg_ctrl.requested_ba &= ~tid_msk;
3220 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3225 static void iwl4965_bg_agg_work(struct work_struct *work)
3227 struct iwl4965_priv *priv = container_of(work, struct iwl4965_priv,
3233 unsigned long flags;
3234 struct iwl4965_lq_mngr *lq = (struct iwl4965_lq_mngr *)&(priv->lq_mngr);
3236 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3237 retry_tid = lq->agg_ctrl.tid_retry;
3238 lq->agg_ctrl.tid_retry = 0;
3239 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3241 if (retry_tid == TID_ALL_SPECIFIED)
3242 iwl4965_turn_on_agg(priv, TID_ALL_SPECIFIED);
3244 for (tid = 0; tid < TID_MAX_LOAD_COUNT; tid++) {
3245 tid_msk = (1 << tid);
3246 if (retry_tid & tid_msk)
3247 iwl4965_turn_on_agg(priv, tid);
3251 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3252 if (lq->agg_ctrl.tid_retry)
3253 lq->agg_ctrl.next_retry = jiffies + msecs_to_jiffies(500);
3254 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3257 #endif /*CONFIG_IWL4965_HT_AGG */
3258 #endif /* CONFIG_IWL4965_HT */
3260 int iwl4965_tx_cmd(struct iwl4965_priv *priv, struct iwl4965_cmd *out_cmd,
3261 u8 sta_id, dma_addr_t txcmd_phys,
3262 struct ieee80211_hdr *hdr, u8 hdr_len,
3263 struct ieee80211_tx_control *ctrl, void *sta_in)
3265 struct iwl4965_tx_cmd *tx = &out_cmd->cmd.tx;
3266 dma_addr_t scratch_phys;
3271 int rate_index = min(ctrl->tx_rate & 0xffff, IWL_RATE_COUNT - 1);
3272 #ifdef CONFIG_IWL4965_HT
3273 #ifdef CONFIG_IWL4965_HT_AGG
3275 #endif /*CONFIG_IWL4965_HT_AGG */
3276 #endif /* CONFIG_IWL4965_HT */
3278 unicast = !is_multicast_ether_addr(hdr->addr1);
3280 fc = le16_to_cpu(hdr->frame_control);
3281 if ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)
3284 scratch_phys = txcmd_phys + sizeof(struct iwl4965_cmd_header) +
3285 offsetof(struct iwl4965_tx_cmd, scratch);
3286 tx->dram_lsb_ptr = cpu_to_le32(scratch_phys);
3287 tx->dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
3289 /* Hard coded to start at the highest retry fallback position
3290 * until the 4965 specific rate control algorithm is tied in */
3291 tx->initial_rate_index = LINK_QUAL_MAX_RETRY_NUM - 1;
3293 /* Alternate between antenna A and B for successive frames */
3294 if (priv->use_ant_b_for_management_frame) {
3295 priv->use_ant_b_for_management_frame = 0;
3296 rate_flags = RATE_MCS_ANT_B_MSK;
3298 priv->use_ant_b_for_management_frame = 1;
3299 rate_flags = RATE_MCS_ANT_A_MSK;
3302 if (!unicast || !is_data) {
3303 if ((rate_index >= IWL_FIRST_CCK_RATE) &&
3304 (rate_index <= IWL_LAST_CCK_RATE))
3305 rate_flags |= RATE_MCS_CCK_MSK;
3307 tx->initial_rate_index = 0;
3308 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
3311 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(iwl4965_rates[rate_index].plcp,
3314 if (ieee80211_is_back_request(fc))
3315 tx->tx_flags |= TX_CMD_FLG_ACK_MSK |
3316 TX_CMD_FLG_IMM_BA_RSP_MASK;
3317 #ifdef CONFIG_IWL4965_HT
3318 #ifdef CONFIG_IWL4965_HT_AGG
3319 qc = ieee80211_get_qos_ctrl(hdr);
3321 (priv->iw_mode != IEEE80211_IF_TYPE_IBSS)) {
3323 tid = (u8) (le16_to_cpu(*qc) & 0xF);
3324 if (tid < TID_MAX_LOAD_COUNT)
3325 iwl4965_tl_add_packet(priv, tid);
3328 if (priv->lq_mngr.agg_ctrl.next_retry &&
3329 (time_after(priv->lq_mngr.agg_ctrl.next_retry, jiffies))) {
3330 unsigned long flags;
3332 spin_lock_irqsave(&priv->lq_mngr.lock, flags);
3333 priv->lq_mngr.agg_ctrl.next_retry = 0;
3334 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3335 schedule_work(&priv->agg_work);
3343 * sign_extend - Sign extend a value using specified bit as sign-bit
3345 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3346 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3348 * @param oper value to sign extend
3349 * @param index 0 based bit index (0<=index<32) to sign bit
3351 static s32 sign_extend(u32 oper, int index)
3353 u8 shift = 31 - index;
3355 return (s32)(oper << shift) >> shift;
3359 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3360 * @statistics: Provides the temperature reading from the uCode
3362 * A return of <0 indicates bogus data in the statistics
3364 int iwl4965_get_temperature(const struct iwl4965_priv *priv)
3371 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3372 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3373 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3374 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3375 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3376 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3377 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3379 IWL_DEBUG_TEMP("Running temperature calibration\n");
3380 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3381 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3382 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3383 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3387 * Temperature is only 23 bits, so sign extend out to 32.
3389 * NOTE If we haven't received a statistics notification yet
3390 * with an updated temperature, use R4 provided to us in the
3391 * "initialize" ALIVE response.
3393 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3394 vt = sign_extend(R4, 23);
3397 le32_to_cpu(priv->statistics.general.temperature), 23);
3399 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3403 IWL_ERROR("Calibration conflict R1 == R3\n");
3407 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3408 * Add offset to center the adjustment around 0 degrees Centigrade. */
3409 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3410 temperature /= (R3 - R1);
3411 temperature = (temperature * 97) / 100 +
3412 TEMPERATURE_CALIB_KELVIN_OFFSET;
3414 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3415 KELVIN_TO_CELSIUS(temperature));
3420 /* Adjust Txpower only if temperature variance is greater than threshold. */
3421 #define IWL_TEMPERATURE_THRESHOLD 3
3424 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3426 * If the temperature changed has changed sufficiently, then a recalibration
3429 * Assumes caller will replace priv->last_temperature once calibration
3432 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv *priv)
3436 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3437 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3441 temp_diff = priv->temperature - priv->last_temperature;
3443 /* get absolute value */
3444 if (temp_diff < 0) {
3445 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3446 temp_diff = -temp_diff;
3447 } else if (temp_diff == 0)
3448 IWL_DEBUG_POWER("Same temp, \n");
3450 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3452 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3453 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3457 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3462 /* Calculate noise level, based on measurements during network silence just
3463 * before arriving beacon. This measurement can be done only if we know
3464 * exactly when to expect beacons, therefore only when we're associated. */
3465 static void iwl4965_rx_calc_noise(struct iwl4965_priv *priv)
3467 struct statistics_rx_non_phy *rx_info
3468 = &(priv->statistics.rx.general);
3469 int num_active_rx = 0;
3470 int total_silence = 0;
3472 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3474 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3476 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3478 if (bcn_silence_a) {
3479 total_silence += bcn_silence_a;
3482 if (bcn_silence_b) {
3483 total_silence += bcn_silence_b;
3486 if (bcn_silence_c) {
3487 total_silence += bcn_silence_c;
3491 /* Average among active antennas */
3493 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3495 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3497 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3498 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3499 priv->last_rx_noise);
3502 void iwl4965_hw_rx_statistics(struct iwl4965_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3504 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3508 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3509 (int)sizeof(priv->statistics), pkt->len);
3511 change = ((priv->statistics.general.temperature !=
3512 pkt->u.stats.general.temperature) ||
3513 ((priv->statistics.flag &
3514 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3515 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3517 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3519 set_bit(STATUS_STATISTICS, &priv->status);
3521 /* Reschedule the statistics timer to occur in
3522 * REG_RECALIB_PERIOD seconds to ensure we get a
3523 * thermal update even if the uCode doesn't give
3525 mod_timer(&priv->statistics_periodic, jiffies +
3526 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3528 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3529 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3530 iwl4965_rx_calc_noise(priv);
3531 #ifdef CONFIG_IWL4965_SENSITIVITY
3532 queue_work(priv->workqueue, &priv->sensitivity_work);
3536 /* If the hardware hasn't reported a change in
3537 * temperature then don't bother computing a
3538 * calibrated temperature value */
3542 temp = iwl4965_get_temperature(priv);
3546 if (priv->temperature != temp) {
3547 if (priv->temperature)
3548 IWL_DEBUG_TEMP("Temperature changed "
3549 "from %dC to %dC\n",
3550 KELVIN_TO_CELSIUS(priv->temperature),
3551 KELVIN_TO_CELSIUS(temp));
3553 IWL_DEBUG_TEMP("Temperature "
3554 "initialized to %dC\n",
3555 KELVIN_TO_CELSIUS(temp));
3558 priv->temperature = temp;
3559 set_bit(STATUS_TEMPERATURE, &priv->status);
3561 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3562 iwl4965_is_temp_calib_needed(priv))
3563 queue_work(priv->workqueue, &priv->txpower_work);
3566 static void iwl4965_add_radiotap(struct iwl4965_priv *priv,
3567 struct sk_buff *skb,
3568 struct iwl4965_rx_phy_res *rx_start,
3569 struct ieee80211_rx_status *stats,
3572 s8 signal = stats->ssi;
3574 int rate = stats->rate;
3575 u64 tsf = stats->mactime;
3576 __le16 phy_flags_hw = rx_start->phy_flags;
3577 struct iwl4965_rt_rx_hdr {
3578 struct ieee80211_radiotap_header rt_hdr;
3579 __le64 rt_tsf; /* TSF */
3580 u8 rt_flags; /* radiotap packet flags */
3581 u8 rt_rate; /* rate in 500kb/s */
3582 __le16 rt_channelMHz; /* channel in MHz */
3583 __le16 rt_chbitmask; /* channel bitfield */
3584 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3586 u8 rt_antenna; /* antenna number */
3587 } __attribute__ ((packed)) *iwl4965_rt;
3589 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3590 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3591 if (net_ratelimit())
3592 printk(KERN_ERR "not enough headroom [%d] for "
3593 "radiotap head [%zd]\n",
3594 skb_headroom(skb), sizeof(*iwl4965_rt));
3598 /* put radiotap header in front of 802.11 header and data */
3599 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3601 /* initialise radiotap header */
3602 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3603 iwl4965_rt->rt_hdr.it_pad = 0;
3605 /* total header + data */
3606 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3607 &iwl4965_rt->rt_hdr.it_len);
3609 /* Indicate all the fields we add to the radiotap header */
3610 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3611 (1 << IEEE80211_RADIOTAP_FLAGS) |
3612 (1 << IEEE80211_RADIOTAP_RATE) |
3613 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3614 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3615 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3616 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3617 &iwl4965_rt->rt_hdr.it_present);
3619 /* Zero the flags, we'll add to them as we go */
3620 iwl4965_rt->rt_flags = 0;
3622 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3624 iwl4965_rt->rt_dbmsignal = signal;
3625 iwl4965_rt->rt_dbmnoise = noise;
3627 /* Convert the channel frequency and set the flags */
3628 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3629 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3630 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3631 IEEE80211_CHAN_5GHZ),
3632 &iwl4965_rt->rt_chbitmask);
3633 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3634 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3635 IEEE80211_CHAN_2GHZ),
3636 &iwl4965_rt->rt_chbitmask);
3638 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3639 IEEE80211_CHAN_2GHZ),
3640 &iwl4965_rt->rt_chbitmask);
3642 rate = iwl4965_rate_index_from_plcp(rate);
3644 iwl4965_rt->rt_rate = 0;
3646 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3651 * It seems that the antenna field in the phy flags value
3652 * is actually a bitfield. This is undefined by radiotap,
3653 * it wants an actual antenna number but I always get "7"
3654 * for most legacy frames I receive indicating that the
3655 * same frame was received on all three RX chains.
3657 * I think this field should be removed in favour of a
3658 * new 802.11n radiotap field "RX chains" that is defined
3661 iwl4965_rt->rt_antenna =
3662 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3664 /* set the preamble flag if appropriate */
3665 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3666 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3668 stats->flag |= RX_FLAG_RADIOTAP;
3671 static void iwl4965_handle_data_packet(struct iwl4965_priv *priv, int is_data,
3673 struct iwl4965_rx_mem_buffer *rxb,
3674 struct ieee80211_rx_status *stats)
3676 struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3677 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3678 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
3679 struct ieee80211_hdr *hdr;
3682 unsigned int skblen;
3685 if (!include_phy && priv->last_phy_res[0])
3686 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3689 IWL_ERROR("MPDU frame without a PHY data\n");
3693 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3694 rx_start->cfg_phy_cnt);
3696 len = le16_to_cpu(rx_start->byte_count);
3698 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3699 sizeof(struct iwl4965_rx_phy_res) +
3700 rx_start->cfg_phy_cnt + len);
3703 struct iwl4965_rx_mpdu_res_start *amsdu =
3704 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3706 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3707 sizeof(struct iwl4965_rx_mpdu_res_start));
3708 len = le16_to_cpu(amsdu->byte_count);
3709 rx_start->byte_count = amsdu->byte_count;
3710 rx_end = (__le32 *) (((u8 *) hdr) + len);
3712 if (len > priv->hw_setting.max_pkt_size || len < 16) {
3713 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3717 ampdu_status = le32_to_cpu(*rx_end);
3718 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3720 /* start from MAC */
3721 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3722 skb_put(rxb->skb, len); /* end where data ends */
3724 /* We only process data packets if the interface is open */
3725 if (unlikely(!priv->is_open)) {
3726 IWL_DEBUG_DROP_LIMIT
3727 ("Dropping packet while interface is not open.\n");
3732 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3734 if (iwl4965_param_hwcrypto)
3735 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3737 if (priv->add_radiotap)
3738 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3740 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3741 priv->alloc_rxb_skb--;
3744 priv->led_packets += len;
3745 iwl4965_setup_activity_timer(priv);
3749 /* Calc max signal level (dBm) among 3 possible receivers */
3750 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3752 /* data from PHY/DSP regarding signal strength, etc.,
3753 * contents are always there, not configurable by host. */
3754 struct iwl4965_rx_non_cfg_phy *ncphy =
3755 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3756 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3759 u32 valid_antennae =
3760 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3761 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3765 /* Find max rssi among 3 possible receivers.
3766 * These values are measured by the digital signal processor (DSP).
3767 * They should stay fairly constant even as the signal strength varies,
3768 * if the radio's automatic gain control (AGC) is working right.
3769 * AGC value (see below) will provide the "interesting" info. */
3770 for (i = 0; i < 3; i++)
3771 if (valid_antennae & (1 << i))
3772 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3774 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3775 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3778 /* dBm = max_rssi dB - agc dB - constant.
3779 * Higher AGC (higher radio gain) means lower signal. */
3780 return (max_rssi - agc - IWL_RSSI_OFFSET);
3783 #ifdef CONFIG_IWL4965_HT
3785 /* Parsed Information Elements */
3786 struct ieee802_11_elems {
3796 u8 ht_cap_param_len;
3798 u8 ht_extra_param_len;
3801 static int parse_elems(u8 *start, size_t len, struct ieee802_11_elems *elems)
3807 memset(elems, 0, sizeof(*elems));
3820 case WLAN_EID_DS_PARAMS:
3821 elems->ds_params = pos;
3822 elems->ds_params_len = elen;
3826 elems->tim_len = elen;
3828 case WLAN_EID_IBSS_PARAMS:
3829 elems->ibss_params = pos;
3830 elems->ibss_params_len = elen;
3832 case WLAN_EID_ERP_INFO:
3833 elems->erp_info = pos;
3834 elems->erp_info_len = elen;
3836 case WLAN_EID_HT_CAPABILITY:
3837 elems->ht_cap_param = pos;
3838 elems->ht_cap_param_len = elen;
3840 case WLAN_EID_HT_EXTRA_INFO:
3841 elems->ht_extra_param = pos;
3842 elems->ht_extra_param_len = elen;
3856 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info *ht_info, int mode)
3859 memset(ht_info->supp_mcs_set, 0, 16);
3861 ht_info->ht_supported = 1;
3863 if (mode == MODE_IEEE80211A) {
3864 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3865 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3866 ht_info->supp_mcs_set[4] = 0x01;
3868 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3869 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3870 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3871 (IWL_MIMO_PS_NONE << 2));
3872 if (iwl4965_param_amsdu_size_8K) {
3873 printk(KERN_DEBUG "iwl4965 in A-MSDU 8K support mode\n");
3874 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3877 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3878 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3880 ht_info->supp_mcs_set[0] = 0xFF;
3881 ht_info->supp_mcs_set[1] = 0xFF;
3883 #endif /* CONFIG_IWL4965_HT */
3885 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv *priv, int sta_id)
3887 unsigned long flags;
3889 spin_lock_irqsave(&priv->sta_lock, flags);
3890 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3891 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3892 priv->stations[sta_id].sta.sta.modify_mask = 0;
3893 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3894 spin_unlock_irqrestore(&priv->sta_lock, flags);
3896 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3899 static void iwl4965_update_ps_mode(struct iwl4965_priv *priv, u16 ps_bit, u8 *addr)
3901 /* FIXME: need locking over ps_status ??? */
3902 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3904 if (sta_id != IWL_INVALID_STATION) {
3905 u8 sta_awake = priv->stations[sta_id].
3906 ps_status == STA_PS_STATUS_WAKE;
3908 if (sta_awake && ps_bit)
3909 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3910 else if (!sta_awake && !ps_bit) {
3911 iwl4965_sta_modify_ps_wake(priv, sta_id);
3912 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3917 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3919 /* Called for REPLY_4965_RX (legacy ABG frames), or
3920 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3921 static void iwl4965_rx_reply_rx(struct iwl4965_priv *priv,
3922 struct iwl4965_rx_mem_buffer *rxb)
3924 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3925 /* Use phy data (Rx signal strength, etc.) contained within
3926 * this rx packet for legacy frames,
3927 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3928 int include_phy = (pkt->hdr.cmd == REPLY_4965_RX);
3929 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3930 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3931 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3933 unsigned int len = 0;
3934 struct ieee80211_hdr *header;
3936 struct ieee80211_rx_status stats = {
3937 .mactime = le64_to_cpu(rx_start->timestamp),
3938 .channel = le16_to_cpu(rx_start->channel),
3940 (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3941 MODE_IEEE80211G : MODE_IEEE80211A,
3943 .rate = iwl4965_hw_get_rate(rx_start->rate_n_flags),
3948 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3950 ("dsp size out of range [0,20]: "
3951 "%d/n", rx_start->cfg_phy_cnt);
3955 if (priv->last_phy_res[0])
3956 rx_start = (struct iwl4965_rx_phy_res *)
3957 &priv->last_phy_res[1];
3963 IWL_ERROR("MPDU frame without a PHY data\n");
3968 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3969 + rx_start->cfg_phy_cnt);
3971 len = le16_to_cpu(rx_start->byte_count);
3972 rx_end = (__le32 *) (pkt->u.raw + rx_start->cfg_phy_cnt +
3973 sizeof(struct iwl4965_rx_phy_res) + len);
3975 struct iwl4965_rx_mpdu_res_start *amsdu =
3976 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3978 header = (void *)(pkt->u.raw +
3979 sizeof(struct iwl4965_rx_mpdu_res_start));
3980 len = le16_to_cpu(amsdu->byte_count);
3981 rx_end = (__le32 *) (pkt->u.raw +
3982 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3985 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3986 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3987 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3988 le32_to_cpu(*rx_end));
3992 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3994 stats.freq = ieee80211chan2mhz(stats.channel);
3996 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3997 stats.ssi = iwl4965_calc_rssi(rx_start);
3999 /* Meaningful noise values are available only from beacon statistics,
4000 * which are gathered only when associated, and indicate noise
4001 * only for the associated network channel ...
4002 * Ignore these noise values while scanning (other channels) */
4003 if (iwl4965_is_associated(priv) &&
4004 !test_bit(STATUS_SCANNING, &priv->status)) {
4005 stats.noise = priv->last_rx_noise;
4006 stats.signal = iwl4965_calc_sig_qual(stats.ssi, stats.noise);
4008 stats.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4009 stats.signal = iwl4965_calc_sig_qual(stats.ssi, 0);
4012 /* Reset beacon noise level if not associated. */
4013 if (!iwl4965_is_associated(priv))
4014 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4016 #ifdef CONFIG_IWL4965_DEBUG
4017 /* TODO: Parts of iwl4965_report_frame are broken for 4965 */
4018 if (iwl4965_debug_level & (IWL_DL_RX))
4019 /* Set "1" to report good data frames in groups of 100 */
4020 iwl4965_report_frame(priv, pkt, header, 1);
4022 if (iwl4965_debug_level & (IWL_DL_RX | IWL_DL_STATS))
4023 IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
4024 stats.ssi, stats.noise, stats.signal,
4025 (long unsigned int)le64_to_cpu(rx_start->timestamp));
4028 network_packet = iwl4965_is_network_packet(priv, header);
4029 if (network_packet) {
4030 priv->last_rx_rssi = stats.ssi;
4031 priv->last_beacon_time = priv->ucode_beacon_time;
4032 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
4035 fc = le16_to_cpu(header->frame_control);
4036 switch (fc & IEEE80211_FCTL_FTYPE) {
4037 case IEEE80211_FTYPE_MGMT:
4039 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4040 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4042 switch (fc & IEEE80211_FCTL_STYPE) {
4043 case IEEE80211_STYPE_PROBE_RESP:
4044 case IEEE80211_STYPE_BEACON:
4045 if ((priv->iw_mode == IEEE80211_IF_TYPE_STA &&
4046 !compare_ether_addr(header->addr2, priv->bssid)) ||
4047 (priv->iw_mode == IEEE80211_IF_TYPE_IBSS &&
4048 !compare_ether_addr(header->addr3, priv->bssid))) {
4049 struct ieee80211_mgmt *mgmt =
4050 (struct ieee80211_mgmt *)header;
4052 le64_to_cpu(mgmt->u.beacon.timestamp);
4054 priv->timestamp0 = timestamp & 0xFFFFFFFF;
4056 (timestamp >> 32) & 0xFFFFFFFF;
4057 priv->beacon_int = le16_to_cpu(
4058 mgmt->u.beacon.beacon_int);
4059 if (priv->call_post_assoc_from_beacon &&
4060 (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
4061 priv->call_post_assoc_from_beacon = 0;
4062 queue_work(priv->workqueue,
4063 &priv->post_associate.work);
4068 case IEEE80211_STYPE_ACTION:
4072 * TODO: Use the new callback function from
4073 * mac80211 instead of sniffing these packets.
4075 case IEEE80211_STYPE_ASSOC_RESP:
4076 case IEEE80211_STYPE_REASSOC_RESP:
4077 if (network_packet) {
4078 #ifdef CONFIG_IWL4965_HT
4080 struct ieee802_11_elems elems;
4081 #endif /*CONFIG_IWL4965_HT */
4082 struct ieee80211_mgmt *mgnt =
4083 (struct ieee80211_mgmt *)header;
4085 /* We have just associated, give some
4086 * time for the 4-way handshake if
4087 * any. Don't start scan too early. */
4088 priv->next_scan_jiffies = jiffies +
4089 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
4091 priv->assoc_id = (~((1 << 15) | (1 << 14))
4092 & le16_to_cpu(mgnt->u.assoc_resp.aid));
4093 priv->assoc_capability =
4095 mgnt->u.assoc_resp.capab_info);
4096 #ifdef CONFIG_IWL4965_HT
4097 pos = mgnt->u.assoc_resp.variable;
4098 if (!parse_elems(pos,
4099 len - (pos - (u8 *) mgnt),
4101 if (elems.ht_extra_param &&
4105 #endif /*CONFIG_IWL4965_HT */
4106 /* assoc_id is 0 no association */
4107 if (!priv->assoc_id)
4109 if (priv->beacon_int)
4110 queue_work(priv->workqueue,
4111 &priv->post_associate.work);
4113 priv->call_post_assoc_from_beacon = 1;
4118 case IEEE80211_STYPE_PROBE_REQ:
4119 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
4120 !iwl4965_is_associated(priv)) {
4121 DECLARE_MAC_BUF(mac1);
4122 DECLARE_MAC_BUF(mac2);
4123 DECLARE_MAC_BUF(mac3);
4125 IWL_DEBUG_DROP("Dropping (non network): "
4127 print_mac(mac1, header->addr1),
4128 print_mac(mac2, header->addr2),
4129 print_mac(mac3, header->addr3));
4133 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &stats);
4136 case IEEE80211_FTYPE_CTL:
4137 #ifdef CONFIG_IWL4965_HT
4138 switch (fc & IEEE80211_FCTL_STYPE) {
4139 case IEEE80211_STYPE_BACK_REQ:
4140 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4141 iwl4965_handle_data_packet(priv, 0, include_phy,
4150 case IEEE80211_FTYPE_DATA: {
4151 DECLARE_MAC_BUF(mac1);
4152 DECLARE_MAC_BUF(mac2);
4153 DECLARE_MAC_BUF(mac3);
4155 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4156 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4159 if (unlikely(!network_packet))
4160 IWL_DEBUG_DROP("Dropping (non network): "
4162 print_mac(mac1, header->addr1),
4163 print_mac(mac2, header->addr2),
4164 print_mac(mac3, header->addr3));
4165 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4166 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4167 print_mac(mac1, header->addr1),
4168 print_mac(mac2, header->addr2),
4169 print_mac(mac3, header->addr3));
4171 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4181 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4182 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4183 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv *priv,
4184 struct iwl4965_rx_mem_buffer *rxb)
4186 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4187 priv->last_phy_res[0] = 1;
4188 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4189 sizeof(struct iwl4965_rx_phy_res));
4192 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv *priv,
4193 struct iwl4965_rx_mem_buffer *rxb)
4196 #ifdef CONFIG_IWL4965_SENSITIVITY
4197 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4198 struct iwl4965_missed_beacon_notif *missed_beacon;
4200 missed_beacon = &pkt->u.missed_beacon;
4201 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4202 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4203 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4204 le32_to_cpu(missed_beacon->total_missed_becons),
4205 le32_to_cpu(missed_beacon->num_recvd_beacons),
4206 le32_to_cpu(missed_beacon->num_expected_beacons));
4207 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4208 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4209 queue_work(priv->workqueue, &priv->sensitivity_work);
4211 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4214 #ifdef CONFIG_IWL4965_HT
4215 #ifdef CONFIG_IWL4965_HT_AGG
4218 * iwl4965_set_tx_status - Update driver's record of one Tx frame's status
4220 * This will get sent to mac80211.
4222 static void iwl4965_set_tx_status(struct iwl4965_priv *priv, int txq_id, int idx,
4223 u32 status, u32 retry_count, u32 rate)
4225 struct ieee80211_tx_status *tx_status =
4226 &(priv->txq[txq_id].txb[idx].status);
4228 tx_status->flags = status ? IEEE80211_TX_STATUS_ACK : 0;
4229 tx_status->retry_count += retry_count;
4230 tx_status->control.tx_rate = rate;
4235 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4237 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
4238 int sta_id, int tid)
4240 unsigned long flags;
4242 /* Remove "disable" flag, to enable Tx for this TID */
4243 spin_lock_irqsave(&priv->sta_lock, flags);
4244 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4245 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4246 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4247 spin_unlock_irqrestore(&priv->sta_lock, flags);
4249 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4254 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4256 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4257 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4259 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
4260 struct iwl4965_ht_agg *agg,
4261 struct iwl4965_compressed_ba_resp*
4266 u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl);
4267 u32 bitmap0, bitmap1;
4268 u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0);
4269 u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1);
4271 if (unlikely(!agg->wait_for_ba)) {
4272 IWL_ERROR("Received BA when not expected\n");
4276 /* Mark that the expected block-ack response arrived */
4277 agg->wait_for_ba = 0;
4278 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl);
4280 /* Calculate shift to align block-ack bits with our Tx window bits */
4281 sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl>>4);
4282 if (sh < 0) /* tbw something is wrong with indices */
4285 /* don't use 64-bit values for now */
4286 bitmap0 = resp_bitmap0 >> sh;
4287 bitmap1 = resp_bitmap1 >> sh;
4288 bitmap0 |= (resp_bitmap1 & ((1<<sh)|((1<<sh)-1))) << (32 - sh);
4290 if (agg->frame_count > (64 - sh)) {
4291 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4295 /* check for success or failure according to the
4296 * transmitted bitmap and block-ack bitmap */
4297 bitmap0 &= agg->bitmap0;
4298 bitmap1 &= agg->bitmap1;
4300 /* For each frame attempted in aggregation,
4301 * update driver's record of tx frame's status. */
4302 for (i = 0; i < agg->frame_count ; i++) {
4303 int idx = (agg->start_idx + i) & 0xff;
4304 ack = bitmap0 & (1 << i);
4305 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4306 ack? "ACK":"NACK", i, idx, agg->start_idx + i);
4307 iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0,
4312 IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1);
4318 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4319 * @index -- current index
4320 * @n_bd -- total number of entries in queue (s/b power of 2)
4322 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4324 return (index == 0) ? n_bd - 1 : index - 1;
4328 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4330 * Handles block-acknowledge notification from device, which reports success
4331 * of frames sent via aggregation.
4333 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
4334 struct iwl4965_rx_mem_buffer *rxb)
4336 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4337 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4339 struct iwl4965_tx_queue *txq = NULL;
4340 struct iwl4965_ht_agg *agg;
4342 /* "flow" corresponds to Tx queue */
4343 u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow);
4345 /* "ssn" is start of block-ack Tx window, corresponds to index
4346 * (in Tx queue's circular buffer) of first TFD/frame in window */
4347 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4349 if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) {
4350 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4354 txq = &priv->txq[ba_resp_scd_flow];
4355 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4357 /* Find index just before block-ack window */
4358 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4360 /* TODO: Need to get this copy more safely - now good for debug */
4363 DECLARE_MAC_BUF(mac);
4364 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4367 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4369 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
4370 "%d, scd_ssn = %d\n",
4372 ba_resp->ba_seq_ctl,
4373 ba_resp->ba_bitmap1,
4374 ba_resp->ba_bitmap0,
4377 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
4384 /* Update driver's record of ACK vs. not for each frame in window */
4385 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4387 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4388 * block-ack window (we assume that they've been successfully
4389 * transmitted ... if not, it's too late anyway). */
4390 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff))
4391 iwl4965_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
4397 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4399 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv, u16 txq_id)
4401 /* Simply stop the queue, but don't change any configuration;
4402 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4403 iwl4965_write_prph(priv,
4404 KDR_SCD_QUEUE_STATUS_BITS(txq_id),
4405 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4406 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4410 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4412 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
4419 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4421 tbl_dw_addr = priv->scd_base_addr +
4422 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4424 tbl_dw = iwl4965_read_targ_mem(priv, tbl_dw_addr);
4427 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4429 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4431 iwl4965_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4437 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4439 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4440 * i.e. it must be one of the higher queues used for aggregation
4442 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
4443 int tx_fifo, int sta_id, int tid,
4446 unsigned long flags;
4450 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4451 IWL_WARNING("queue number too small: %d, must be > %d\n",
4452 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4454 ra_tid = BUILD_RAxTID(sta_id, tid);
4456 /* Modify device's station table to Tx this TID */
4457 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4459 spin_lock_irqsave(&priv->lock, flags);
4460 rc = iwl4965_grab_nic_access(priv);
4462 spin_unlock_irqrestore(&priv->lock, flags);
4466 /* Stop this Tx queue before configuring it */
4467 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4469 /* Map receiver-address / traffic-ID to this queue */
4470 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4472 /* Set this queue as a chain-building queue */
4473 iwl4965_set_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1<<txq_id));
4475 /* Place first TFD at index corresponding to start sequence number.
4476 * Assumes that ssn_idx is valid (!= 0xFFF) */
4477 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4478 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4479 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4481 /* Set up Tx window size and frame limit for this queue */
4482 iwl4965_write_targ_mem(priv,
4483 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4484 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4485 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4487 iwl4965_write_targ_mem(priv, priv->scd_base_addr +
4488 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4489 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4490 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4492 iwl4965_set_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4494 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4495 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4497 iwl4965_release_nic_access(priv);
4498 spin_unlock_irqrestore(&priv->lock, flags);
4504 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4506 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
4507 u16 ssn_idx, u8 tx_fifo)
4509 unsigned long flags;
4512 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4513 IWL_WARNING("queue number too small: %d, must be > %d\n",
4514 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4518 spin_lock_irqsave(&priv->lock, flags);
4519 rc = iwl4965_grab_nic_access(priv);
4521 spin_unlock_irqrestore(&priv->lock, flags);
4525 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4527 iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4529 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4530 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4531 /* supposes that ssn_idx is valid (!= 0xFFF) */
4532 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4534 iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
4535 iwl4965_txq_ctx_deactivate(priv, txq_id);
4536 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4538 iwl4965_release_nic_access(priv);
4539 spin_unlock_irqrestore(&priv->lock, flags);
4544 #endif/* CONFIG_IWL4965_HT_AGG */
4545 #endif /* CONFIG_IWL4965_HT */
4548 * iwl4965_add_station - Initialize a station's hardware rate table
4550 * The uCode's station table contains a table of fallback rates
4551 * for automatic fallback during transmission.
4553 * NOTE: This sets up a default set of values. These will be replaced later
4554 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4557 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4558 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4559 * which requires station table entry to exist).
4561 void iwl4965_add_station(struct iwl4965_priv *priv, const u8 *addr, int is_ap)
4564 struct iwl4965_link_quality_cmd link_cmd = {
4569 /* Set up the rate scaling to start at selected rate, fall back
4570 * all the way down to 1M in IEEE order, and then spin on 1M */
4572 r = IWL_RATE_54M_INDEX;
4573 else if (priv->phymode == MODE_IEEE80211A)
4574 r = IWL_RATE_6M_INDEX;
4576 r = IWL_RATE_1M_INDEX;
4578 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4580 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4581 rate_flags |= RATE_MCS_CCK_MSK;
4583 /* Use Tx antenna B only */
4584 rate_flags |= RATE_MCS_ANT_B_MSK;
4585 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4587 link_cmd.rs_table[i].rate_n_flags =
4588 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4589 r = iwl4965_get_prev_ieee_rate(r);
4592 link_cmd.general_params.single_stream_ant_msk = 2;
4593 link_cmd.general_params.dual_stream_ant_msk = 3;
4594 link_cmd.agg_params.agg_dis_start_th = 3;
4595 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4597 /* Update the rate scaling for control frame Tx to AP */
4598 link_cmd.sta_id = is_ap ? IWL_AP_ID : IWL4965_BROADCAST_ID;
4600 iwl4965_send_cmd_pdu(priv, REPLY_TX_LINK_QUALITY_CMD, sizeof(link_cmd),
4604 #ifdef CONFIG_IWL4965_HT
4606 static u8 iwl4965_is_channel_extension(struct iwl4965_priv *priv, int phymode,
4607 u16 channel, u8 extension_chan_offset)
4609 const struct iwl4965_channel_info *ch_info;
4611 ch_info = iwl4965_get_channel_info(priv, phymode, channel);
4612 if (!is_channel_valid(ch_info))
4615 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO)
4618 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4619 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4625 static u8 iwl4965_is_fat_tx_allowed(struct iwl4965_priv *priv,
4626 struct ieee80211_ht_info *sta_ht_inf)
4628 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4630 if ((!iwl_ht_conf->is_ht) ||
4631 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4632 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_AUTO))
4636 if ((!sta_ht_inf->ht_supported) ||
4637 (!sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH))
4641 return (iwl4965_is_channel_extension(priv, priv->phymode,
4642 iwl_ht_conf->control_channel,
4643 iwl_ht_conf->extension_chan_offset));
4646 void iwl4965_set_rxon_ht(struct iwl4965_priv *priv, struct iwl_ht_info *ht_info)
4648 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4651 if (!ht_info->is_ht)
4654 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4655 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4656 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4658 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4659 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4661 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4662 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4663 le16_to_cpu(rxon->channel),
4664 ht_info->control_channel);
4665 rxon->channel = cpu_to_le16(ht_info->control_channel);
4669 /* Note: control channel is opposite of extension channel */
4670 switch (ht_info->extension_chan_offset) {
4671 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4672 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4674 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4675 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4677 case IWL_EXT_CHANNEL_OFFSET_AUTO:
4678 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4681 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4685 val = ht_info->ht_protection;
4687 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4689 iwl4965_set_rxon_chain(priv);
4691 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4692 "rxon flags 0x%X operation mode :0x%X "
4693 "extension channel offset 0x%x "
4694 "control chan %d\n",
4695 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4696 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4697 ht_info->extension_chan_offset,
4698 ht_info->control_channel);
4702 void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
4703 struct ieee80211_ht_info *sta_ht_inf)
4707 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4710 sta_flags = priv->stations[index].sta.station_flags;
4712 if (((sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS >> 2))
4713 == IWL_MIMO_PS_DYNAMIC)
4714 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4716 sta_flags &= ~STA_FLG_RTS_MIMO_PROT_MSK;
4718 sta_flags |= cpu_to_le32(
4719 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4721 sta_flags |= cpu_to_le32(
4722 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4724 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4725 sta_flags |= STA_FLG_FAT_EN_MSK;
4727 sta_flags &= (~STA_FLG_FAT_EN_MSK);
4729 priv->stations[index].sta.station_flags = sta_flags;
4734 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv *priv,
4735 int sta_id, int tid, u16 ssn)
4737 unsigned long flags;
4739 spin_lock_irqsave(&priv->sta_lock, flags);
4740 priv->stations[sta_id].sta.station_flags_msk = 0;
4741 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4742 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4743 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4744 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4745 spin_unlock_irqrestore(&priv->sta_lock, flags);
4747 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4750 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
4751 int sta_id, int tid)
4753 unsigned long flags;
4755 spin_lock_irqsave(&priv->sta_lock, flags);
4756 priv->stations[sta_id].sta.station_flags_msk = 0;
4757 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4758 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4759 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4760 spin_unlock_irqrestore(&priv->sta_lock, flags);
4762 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4765 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4766 enum ieee80211_ampdu_mlme_action action,
4767 const u8 *addr, u16 tid, u16 ssn)
4769 struct iwl4965_priv *priv = hw->priv;
4771 DECLARE_MAC_BUF(mac);
4773 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4774 print_mac(mac, addr), tid);
4775 sta_id = iwl4965_hw_find_station(priv, addr);
4777 case IEEE80211_AMPDU_RX_START:
4778 IWL_DEBUG_HT("start Rx\n");
4779 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, ssn);
4781 case IEEE80211_AMPDU_RX_STOP:
4782 IWL_DEBUG_HT("stop Rx\n");
4783 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4786 IWL_DEBUG_HT("unknown\n");
4793 #ifdef CONFIG_IWL4965_HT_AGG
4795 static const u16 default_tid_to_tx_fifo[] = {
4816 * Find first available (lowest unused) Tx Queue, mark it "active".
4817 * Called only when finding queue for aggregation.
4818 * Should never return anything < 7, because they should already
4819 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4821 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
4825 for (txq_id = 0; txq_id < priv->hw_setting.max_txq_num; txq_id++)
4826 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4831 int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid,
4835 struct iwl4965_priv *priv = hw->priv;
4840 unsigned long flags;
4841 struct iwl4965_tid_data *tid_data;
4842 DECLARE_MAC_BUF(mac);
4844 /* Determine Tx DMA/FIFO channel for this Traffic ID */
4845 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4846 tx_fifo = default_tid_to_tx_fifo[tid];
4850 IWL_WARNING("iwl-AGG iwl4965_mac_ht_tx_agg_start on da=%s"
4851 " tid=%d\n", print_mac(mac, da), tid);
4853 /* Get index into station table */
4854 sta_id = iwl4965_hw_find_station(priv, da);
4855 if (sta_id == IWL_INVALID_STATION)
4858 /* Find available Tx queue for aggregation */
4859 txq_id = iwl4965_txq_ctx_activate_free(priv);
4863 spin_lock_irqsave(&priv->sta_lock, flags);
4864 tid_data = &priv->stations[sta_id].tid[tid];
4866 /* Get starting sequence number for 1st frame in block ack window.
4867 * We'll use least signif byte as 1st frame's index into Tx queue. */
4868 ssn = SEQ_TO_SN(tid_data->seq_number);
4869 tid_data->agg.txq_id = txq_id;
4870 spin_unlock_irqrestore(&priv->sta_lock, flags);
4872 *start_seq_num = ssn;
4874 /* Update driver's link quality manager */
4875 iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE);
4877 /* Set up and enable aggregation for selected Tx queue and FIFO */
4878 return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4883 int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid,
4887 struct iwl4965_priv *priv = hw->priv;
4888 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4889 struct iwl4965_tid_data *tid_data;
4891 DECLARE_MAC_BUF(mac);
4894 IWL_ERROR("%s: da = NULL\n", __func__);
4898 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4899 tx_fifo_id = default_tid_to_tx_fifo[tid];
4903 sta_id = iwl4965_hw_find_station(priv, da);
4905 if (sta_id == IWL_INVALID_STATION)
4908 tid_data = &priv->stations[sta_id].tid[tid];
4909 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4910 txq_id = tid_data->agg.txq_id;
4912 rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4913 /* FIXME: need more safe way to handle error condition */
4917 iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA);
4918 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4919 print_mac(mac, da), tid);
4925 #endif /* CONFIG_IWL4965_HT_AGG */
4926 #endif /* CONFIG_IWL4965_HT */
4928 /* Set up 4965-specific Rx frame reply handlers */
4929 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
4931 /* Legacy Rx frames */
4932 priv->rx_handlers[REPLY_4965_RX] = iwl4965_rx_reply_rx;
4934 /* High-throughput (HT) Rx frames */
4935 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4936 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4938 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4939 iwl4965_rx_missed_beacon_notif;
4941 #ifdef CONFIG_IWL4965_HT
4942 #ifdef CONFIG_IWL4965_HT_AGG
4943 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4944 #endif /* CONFIG_IWL4965_HT_AGG */
4945 #endif /* CONFIG_IWL4965_HT */
4948 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv *priv)
4950 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4951 INIT_WORK(&priv->statistics_work, iwl4965_bg_statistics_work);
4952 #ifdef CONFIG_IWL4965_SENSITIVITY
4953 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4955 #ifdef CONFIG_IWL4965_HT
4956 #ifdef CONFIG_IWL4965_HT_AGG
4957 INIT_WORK(&priv->agg_work, iwl4965_bg_agg_work);
4958 #endif /* CONFIG_IWL4965_HT_AGG */
4959 #endif /* CONFIG_IWL4965_HT */
4960 init_timer(&priv->statistics_periodic);
4961 priv->statistics_periodic.data = (unsigned long)priv;
4962 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4965 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv *priv)
4967 del_timer_sync(&priv->statistics_periodic);
4969 cancel_delayed_work(&priv->init_alive_start);
4972 struct pci_device_id iwl4965_hw_card_ids[] = {
4973 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4229)},
4974 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x4230)},
4979 * The device's EEPROM semaphore prevents conflicts between driver and uCode
4980 * when accessing the EEPROM; each access is a series of pulses to/from the
4981 * EEPROM chip, not a single event, so even reads could conflict if they
4982 * weren't arbitrated by the semaphore.
4984 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv)
4989 for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
4990 /* Request semaphore */
4991 iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
4992 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
4994 /* See if we got it */
4995 rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
4996 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4997 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
4998 EEPROM_SEM_TIMEOUT);
5000 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
5009 inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv *priv)
5011 iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
5012 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
5016 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);