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 #ifdef CONFIG_IWL4965_HT
84 static const u16 default_tid_to_tx_fifo
[] = {
104 #endif /*CONFIG_IWL4965_HT */
106 static int is_fat_channel(__le32 rxon_flags
)
108 return (rxon_flags
& RXON_FLG_CHANNEL_MODE_PURE_40_MSK
) ||
109 (rxon_flags
& RXON_FLG_CHANNEL_MODE_MIXED_MSK
);
112 static u8
is_single_stream(struct iwl4965_priv
*priv
)
114 #ifdef CONFIG_IWL4965_HT
115 if (!priv
->current_ht_config
.is_ht
||
116 (priv
->current_ht_config
.supp_mcs_set
[1] == 0) ||
117 (priv
->ps_mode
== IWL_MIMO_PS_STATIC
))
121 #endif /*CONFIG_IWL4965_HT */
126 * Determine how many receiver/antenna chains to use.
127 * More provides better reception via diversity. Fewer saves power.
128 * MIMO (dual stream) requires at least 2, but works better with 3.
129 * This does not determine *which* chains to use, just how many.
131 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv
*priv
,
132 u8
*idle_state
, u8
*rx_state
)
134 u8 is_single
= is_single_stream(priv
);
135 u8 is_cam
= test_bit(STATUS_POWER_PMI
, &priv
->status
) ? 0 : 1;
137 /* # of Rx chains to use when expecting MIMO. */
138 if (is_single
|| (!is_cam
&& (priv
->ps_mode
== IWL_MIMO_PS_STATIC
)))
143 /* # Rx chains when idling and maybe trying to save power */
144 switch (priv
->ps_mode
) {
145 case IWL_MIMO_PS_STATIC
:
146 case IWL_MIMO_PS_DYNAMIC
:
147 *idle_state
= (is_cam
) ? 2 : 1;
149 case IWL_MIMO_PS_NONE
:
150 *idle_state
= (is_cam
) ? *rx_state
: 1;
160 int iwl4965_hw_rxq_stop(struct iwl4965_priv
*priv
)
165 spin_lock_irqsave(&priv
->lock
, flags
);
166 rc
= iwl4965_grab_nic_access(priv
);
168 spin_unlock_irqrestore(&priv
->lock
, flags
);
173 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
, 0);
174 rc
= iwl4965_poll_direct_bit(priv
, FH_MEM_RSSR_RX_STATUS_REG
,
177 IWL_ERROR("Can't stop Rx DMA.\n");
179 iwl4965_release_nic_access(priv
);
180 spin_unlock_irqrestore(&priv
->lock
, flags
);
185 u8
iwl4965_hw_find_station(struct iwl4965_priv
*priv
, const u8
*addr
)
189 int ret
= IWL_INVALID_STATION
;
191 DECLARE_MAC_BUF(mac
);
193 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) ||
194 (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
))
197 if (is_broadcast_ether_addr(addr
))
198 return IWL4965_BROADCAST_ID
;
200 spin_lock_irqsave(&priv
->sta_lock
, flags
);
201 for (i
= start
; i
< priv
->hw_setting
.max_stations
; i
++)
202 if ((priv
->stations
[i
].used
) &&
204 (priv
->stations
[i
].sta
.sta
.addr
, addr
))) {
209 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
210 print_mac(mac
, addr
), priv
->num_stations
);
213 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
217 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv
*priv
, int pwr_max
)
222 spin_lock_irqsave(&priv
->lock
, flags
);
223 ret
= iwl4965_grab_nic_access(priv
);
225 spin_unlock_irqrestore(&priv
->lock
, flags
);
232 ret
= pci_read_config_dword(priv
->pci_dev
, PCI_POWER_SOURCE
,
235 if (val
& PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT
)
236 iwl4965_set_bits_mask_prph(priv
, APMG_PS_CTRL_REG
,
237 APMG_PS_CTRL_VAL_PWR_SRC_VAUX
,
238 ~APMG_PS_CTRL_MSK_PWR_SRC
);
240 iwl4965_set_bits_mask_prph(priv
, APMG_PS_CTRL_REG
,
241 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN
,
242 ~APMG_PS_CTRL_MSK_PWR_SRC
);
244 iwl4965_release_nic_access(priv
);
245 spin_unlock_irqrestore(&priv
->lock
, flags
);
250 static int iwl4965_rx_init(struct iwl4965_priv
*priv
, struct iwl4965_rx_queue
*rxq
)
254 unsigned int rb_size
;
256 spin_lock_irqsave(&priv
->lock
, flags
);
257 rc
= iwl4965_grab_nic_access(priv
);
259 spin_unlock_irqrestore(&priv
->lock
, flags
);
263 if (iwl4965_param_amsdu_size_8K
)
264 rb_size
= FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K
;
266 rb_size
= FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K
;
269 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
, 0);
271 /* Reset driver's Rx queue write index */
272 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_RBDCB_WPTR_REG
, 0);
274 /* Tell device where to find RBD circular buffer in DRAM */
275 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_RBDCB_BASE_REG
,
278 /* Tell device where in DRAM to update its Rx status */
279 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_STTS_WPTR_REG
,
280 (priv
->hw_setting
.shared_phys
+
281 offsetof(struct iwl4965_shared
, val0
)) >> 4);
283 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
284 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
,
285 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL
|
286 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL
|
289 (RX_QUEUE_SIZE_LOG
<<
290 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT
));
293 * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
296 iwl4965_release_nic_access(priv
);
297 spin_unlock_irqrestore(&priv
->lock
, flags
);
302 /* Tell 4965 where to find the "keep warm" buffer */
303 static int iwl4965_kw_init(struct iwl4965_priv
*priv
)
308 spin_lock_irqsave(&priv
->lock
, flags
);
309 rc
= iwl4965_grab_nic_access(priv
);
313 iwl4965_write_direct32(priv
, IWL_FH_KW_MEM_ADDR_REG
,
314 priv
->kw
.dma_addr
>> 4);
315 iwl4965_release_nic_access(priv
);
317 spin_unlock_irqrestore(&priv
->lock
, flags
);
321 static int iwl4965_kw_alloc(struct iwl4965_priv
*priv
)
323 struct pci_dev
*dev
= priv
->pci_dev
;
324 struct iwl4965_kw
*kw
= &priv
->kw
;
326 kw
->size
= IWL4965_KW_SIZE
; /* TBW need set somewhere else */
327 kw
->v_addr
= pci_alloc_consistent(dev
, kw
->size
, &kw
->dma_addr
);
334 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
338 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
340 * Does not set up a command, or touch hardware.
342 int iwl4965_set_fat_chan_info(struct iwl4965_priv
*priv
,
343 enum ieee80211_band band
, u16 channel
,
344 const struct iwl4965_eeprom_channel
*eeprom_ch
,
345 u8 fat_extension_channel
)
347 struct iwl4965_channel_info
*ch_info
;
349 ch_info
= (struct iwl4965_channel_info
*)
350 iwl4965_get_channel_info(priv
, band
, channel
);
352 if (!is_channel_valid(ch_info
))
355 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
356 " %ddBm): Ad-Hoc %ssupported\n",
358 is_channel_a_band(ch_info
) ?
360 CHECK_AND_PRINT(IBSS
),
361 CHECK_AND_PRINT(ACTIVE
),
362 CHECK_AND_PRINT(RADAR
),
363 CHECK_AND_PRINT(WIDE
),
364 CHECK_AND_PRINT(NARROW
),
365 CHECK_AND_PRINT(DFS
),
367 eeprom_ch
->max_power_avg
,
368 ((eeprom_ch
->flags
& EEPROM_CHANNEL_IBSS
)
369 && !(eeprom_ch
->flags
& EEPROM_CHANNEL_RADAR
)) ?
372 ch_info
->fat_eeprom
= *eeprom_ch
;
373 ch_info
->fat_max_power_avg
= eeprom_ch
->max_power_avg
;
374 ch_info
->fat_curr_txpow
= eeprom_ch
->max_power_avg
;
375 ch_info
->fat_min_power
= 0;
376 ch_info
->fat_scan_power
= eeprom_ch
->max_power_avg
;
377 ch_info
->fat_flags
= eeprom_ch
->flags
;
378 ch_info
->fat_extension_channel
= fat_extension_channel
;
384 * iwl4965_kw_free - Free the "keep warm" buffer
386 static void iwl4965_kw_free(struct iwl4965_priv
*priv
)
388 struct pci_dev
*dev
= priv
->pci_dev
;
389 struct iwl4965_kw
*kw
= &priv
->kw
;
392 pci_free_consistent(dev
, kw
->size
, kw
->v_addr
, kw
->dma_addr
);
393 memset(kw
, 0, sizeof(*kw
));
398 * iwl4965_txq_ctx_reset - Reset TX queue context
399 * Destroys all DMA structures and initialise them again
404 static int iwl4965_txq_ctx_reset(struct iwl4965_priv
*priv
)
407 int txq_id
, slots_num
;
410 iwl4965_kw_free(priv
);
412 /* Free all tx/cmd queues and keep-warm buffer */
413 iwl4965_hw_txq_ctx_free(priv
);
415 /* Alloc keep-warm buffer */
416 rc
= iwl4965_kw_alloc(priv
);
418 IWL_ERROR("Keep Warm allocation failed");
422 spin_lock_irqsave(&priv
->lock
, flags
);
424 rc
= iwl4965_grab_nic_access(priv
);
426 IWL_ERROR("TX reset failed");
427 spin_unlock_irqrestore(&priv
->lock
, flags
);
431 /* Turn off all Tx DMA channels */
432 iwl4965_write_prph(priv
, KDR_SCD_TXFACT
, 0);
433 iwl4965_release_nic_access(priv
);
434 spin_unlock_irqrestore(&priv
->lock
, flags
);
436 /* Tell 4965 where to find the keep-warm buffer */
437 rc
= iwl4965_kw_init(priv
);
439 IWL_ERROR("kw_init failed\n");
443 /* Alloc and init all (default 16) Tx queues,
444 * including the command queue (#4) */
445 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++) {
446 slots_num
= (txq_id
== IWL_CMD_QUEUE_NUM
) ?
447 TFD_CMD_SLOTS
: TFD_TX_CMD_SLOTS
;
448 rc
= iwl4965_tx_queue_init(priv
, &priv
->txq
[txq_id
], slots_num
,
451 IWL_ERROR("Tx %d queue init failed\n", txq_id
);
459 iwl4965_hw_txq_ctx_free(priv
);
461 iwl4965_kw_free(priv
);
466 int iwl4965_hw_nic_init(struct iwl4965_priv
*priv
)
470 struct iwl4965_rx_queue
*rxq
= &priv
->rxq
;
475 iwl4965_power_init_handle(priv
);
478 spin_lock_irqsave(&priv
->lock
, flags
);
480 iwl4965_set_bit(priv
, CSR_GIO_CHICKEN_BITS
,
481 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER
);
483 iwl4965_set_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
484 rc
= iwl4965_poll_bit(priv
, CSR_GP_CNTRL
,
485 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
,
486 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
, 25000);
488 spin_unlock_irqrestore(&priv
->lock
, flags
);
489 IWL_DEBUG_INFO("Failed to init the card\n");
493 rc
= iwl4965_grab_nic_access(priv
);
495 spin_unlock_irqrestore(&priv
->lock
, flags
);
499 iwl4965_read_prph(priv
, APMG_CLK_CTRL_REG
);
501 iwl4965_write_prph(priv
, APMG_CLK_CTRL_REG
,
502 APMG_CLK_VAL_DMA_CLK_RQT
|
503 APMG_CLK_VAL_BSM_CLK_RQT
);
504 iwl4965_read_prph(priv
, APMG_CLK_CTRL_REG
);
508 iwl4965_set_bits_prph(priv
, APMG_PCIDEV_STT_REG
,
509 APMG_PCIDEV_STT_VAL_L1_ACT_DIS
);
511 iwl4965_release_nic_access(priv
);
512 iwl4965_write32(priv
, CSR_INT_COALESCING
, 512 / 32);
513 spin_unlock_irqrestore(&priv
->lock
, flags
);
515 /* Determine HW type */
516 rc
= pci_read_config_byte(priv
->pci_dev
, PCI_REVISION_ID
, &rev_id
);
520 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id
);
522 iwl4965_nic_set_pwr_src(priv
, 1);
523 spin_lock_irqsave(&priv
->lock
, flags
);
525 if ((rev_id
& 0x80) == 0x80 && (rev_id
& 0x7f) < 8) {
526 pci_read_config_dword(priv
->pci_dev
, PCI_REG_WUM8
, &val
);
527 /* Enable No Snoop field */
528 pci_write_config_dword(priv
->pci_dev
, PCI_REG_WUM8
,
532 spin_unlock_irqrestore(&priv
->lock
, flags
);
534 if (priv
->eeprom
.calib_version
< EEPROM_TX_POWER_VERSION_NEW
) {
535 IWL_ERROR("Older EEPROM detected! Aborting.\n");
539 pci_read_config_byte(priv
->pci_dev
, PCI_LINK_CTRL
, &val_link
);
541 /* disable L1 entry -- workaround for pre-B1 */
542 pci_write_config_byte(priv
->pci_dev
, PCI_LINK_CTRL
, val_link
& ~0x02);
544 spin_lock_irqsave(&priv
->lock
, flags
);
546 /* set CSR_HW_CONFIG_REG for uCode use */
548 iwl4965_set_bit(priv
, CSR_SW_VER
, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R
|
549 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI
|
550 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI
);
552 rc
= iwl4965_grab_nic_access(priv
);
554 spin_unlock_irqrestore(&priv
->lock
, flags
);
555 IWL_DEBUG_INFO("Failed to init the card\n");
559 iwl4965_read_prph(priv
, APMG_PS_CTRL_REG
);
560 iwl4965_set_bits_prph(priv
, APMG_PS_CTRL_REG
,
561 APMG_PS_CTRL_VAL_RESET_REQ
);
563 iwl4965_clear_bits_prph(priv
, APMG_PS_CTRL_REG
,
564 APMG_PS_CTRL_VAL_RESET_REQ
);
566 iwl4965_release_nic_access(priv
);
567 spin_unlock_irqrestore(&priv
->lock
, flags
);
569 iwl4965_hw_card_show_info(priv
);
573 /* Allocate the RX queue, or reset if it is already allocated */
575 rc
= iwl4965_rx_queue_alloc(priv
);
577 IWL_ERROR("Unable to initialize Rx queue\n");
581 iwl4965_rx_queue_reset(priv
, rxq
);
583 iwl4965_rx_replenish(priv
);
585 iwl4965_rx_init(priv
, rxq
);
587 spin_lock_irqsave(&priv
->lock
, flags
);
589 rxq
->need_update
= 1;
590 iwl4965_rx_queue_update_write_ptr(priv
, rxq
);
592 spin_unlock_irqrestore(&priv
->lock
, flags
);
594 /* Allocate and init all Tx and Command queues */
595 rc
= iwl4965_txq_ctx_reset(priv
);
599 if (priv
->eeprom
.sku_cap
& EEPROM_SKU_CAP_SW_RF_KILL_ENABLE
)
600 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
602 if (priv
->eeprom
.sku_cap
& EEPROM_SKU_CAP_HW_RF_KILL_ENABLE
)
603 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
605 set_bit(STATUS_INIT
, &priv
->status
);
610 int iwl4965_hw_nic_stop_master(struct iwl4965_priv
*priv
)
616 spin_lock_irqsave(&priv
->lock
, flags
);
618 /* set stop master bit */
619 iwl4965_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_STOP_MASTER
);
621 reg_val
= iwl4965_read32(priv
, CSR_GP_CNTRL
);
623 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE
==
624 (reg_val
& CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE
))
625 IWL_DEBUG_INFO("Card in power save, master is already "
628 rc
= iwl4965_poll_bit(priv
, CSR_RESET
,
629 CSR_RESET_REG_FLAG_MASTER_DISABLED
,
630 CSR_RESET_REG_FLAG_MASTER_DISABLED
, 100);
632 spin_unlock_irqrestore(&priv
->lock
, flags
);
637 spin_unlock_irqrestore(&priv
->lock
, flags
);
638 IWL_DEBUG_INFO("stop master\n");
644 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
646 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv
*priv
)
652 /* Stop each Tx DMA channel, and wait for it to be idle */
653 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++) {
654 spin_lock_irqsave(&priv
->lock
, flags
);
655 if (iwl4965_grab_nic_access(priv
)) {
656 spin_unlock_irqrestore(&priv
->lock
, flags
);
660 iwl4965_write_direct32(priv
,
661 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id
),
663 iwl4965_poll_direct_bit(priv
, IWL_FH_TSSR_TX_STATUS_REG
,
664 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
666 iwl4965_release_nic_access(priv
);
667 spin_unlock_irqrestore(&priv
->lock
, flags
);
670 /* Deallocate memory for all Tx queues */
671 iwl4965_hw_txq_ctx_free(priv
);
674 int iwl4965_hw_nic_reset(struct iwl4965_priv
*priv
)
679 iwl4965_hw_nic_stop_master(priv
);
681 spin_lock_irqsave(&priv
->lock
, flags
);
683 iwl4965_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_SW_RESET
);
687 iwl4965_set_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
688 rc
= iwl4965_poll_bit(priv
, CSR_RESET
,
689 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
,
690 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
, 25);
694 rc
= iwl4965_grab_nic_access(priv
);
696 iwl4965_write_prph(priv
, APMG_CLK_EN_REG
,
697 APMG_CLK_VAL_DMA_CLK_RQT
|
698 APMG_CLK_VAL_BSM_CLK_RQT
);
702 iwl4965_set_bits_prph(priv
, APMG_PCIDEV_STT_REG
,
703 APMG_PCIDEV_STT_VAL_L1_ACT_DIS
);
705 iwl4965_release_nic_access(priv
);
708 clear_bit(STATUS_HCMD_ACTIVE
, &priv
->status
);
709 wake_up_interruptible(&priv
->wait_command_queue
);
711 spin_unlock_irqrestore(&priv
->lock
, flags
);
717 #define REG_RECALIB_PERIOD (60)
720 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
722 * This callback is provided in order to queue the statistics_work
723 * in work_queue context (v. softirq)
725 * This timer function is continually reset to execute within
726 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
727 * was received. We need to ensure we receive the statistics in order
728 * to update the temperature used for calibrating the TXPOWER. However,
729 * we can't send the statistics command from softirq context (which
730 * is the context which timers run at) so we have to queue off the
731 * statistics_work to actually send the command to the hardware.
733 static void iwl4965_bg_statistics_periodic(unsigned long data
)
735 struct iwl4965_priv
*priv
= (struct iwl4965_priv
*)data
;
737 queue_work(priv
->workqueue
, &priv
->statistics_work
);
741 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
743 * This is queued by iwl4965_bg_statistics_periodic.
745 static void iwl4965_bg_statistics_work(struct work_struct
*work
)
747 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
750 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
753 mutex_lock(&priv
->mutex
);
754 iwl4965_send_statistics_request(priv
);
755 mutex_unlock(&priv
->mutex
);
758 #define CT_LIMIT_CONST 259
759 #define TM_CT_KILL_THRESHOLD 110
761 void iwl4965_rf_kill_ct_config(struct iwl4965_priv
*priv
)
763 struct iwl4965_ct_kill_config cmd
;
766 u32 crit_temperature
;
770 spin_lock_irqsave(&priv
->lock
, flags
);
771 iwl4965_write32(priv
, CSR_UCODE_DRV_GP1_CLR
,
772 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT
);
773 spin_unlock_irqrestore(&priv
->lock
, flags
);
775 if (priv
->statistics
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
) {
776 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[1]);
777 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[1]);
778 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[1]);
780 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[0]);
781 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[0]);
782 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[0]);
785 temp_th
= CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD
);
787 crit_temperature
= ((temp_th
* (R3
-R1
))/CT_LIMIT_CONST
) + R2
;
788 cmd
.critical_temperature_R
= cpu_to_le32(crit_temperature
);
789 rc
= iwl4965_send_cmd_pdu(priv
,
790 REPLY_CT_KILL_CONFIG_CMD
, sizeof(cmd
), &cmd
);
792 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
794 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
797 #ifdef CONFIG_IWL4965_SENSITIVITY
799 /* "false alarms" are signals that our DSP tries to lock onto,
800 * but then determines that they are either noise, or transmissions
801 * from a distant wireless network (also "noise", really) that get
802 * "stepped on" by stronger transmissions within our own network.
803 * This algorithm attempts to set a sensitivity level that is high
804 * enough to receive all of our own network traffic, but not so
805 * high that our DSP gets too busy trying to lock onto non-network
807 static int iwl4965_sens_energy_cck(struct iwl4965_priv
*priv
,
810 struct statistics_general_data
*rx_info
)
814 u8 max_silence_rssi
= 0;
816 u8 silence_rssi_a
= 0;
817 u8 silence_rssi_b
= 0;
818 u8 silence_rssi_c
= 0;
821 /* "false_alarms" values below are cross-multiplications to assess the
822 * numbers of false alarms within the measured period of actual Rx
823 * (Rx is off when we're txing), vs the min/max expected false alarms
824 * (some should be expected if rx is sensitive enough) in a
825 * hypothetical listening period of 200 time units (TU), 204.8 msec:
827 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
830 u32 false_alarms
= norm_fa
* 200 * 1024;
831 u32 max_false_alarms
= MAX_FA_CCK
* rx_enable_time
;
832 u32 min_false_alarms
= MIN_FA_CCK
* rx_enable_time
;
833 struct iwl4965_sensitivity_data
*data
= NULL
;
835 data
= &(priv
->sensitivity_data
);
837 data
->nrg_auto_corr_silence_diff
= 0;
839 /* Find max silence rssi among all 3 receivers.
840 * This is background noise, which may include transmissions from other
841 * networks, measured during silence before our network's beacon */
842 silence_rssi_a
= (u8
)((rx_info
->beacon_silence_rssi_a
&
843 ALL_BAND_FILTER
) >> 8);
844 silence_rssi_b
= (u8
)((rx_info
->beacon_silence_rssi_b
&
845 ALL_BAND_FILTER
) >> 8);
846 silence_rssi_c
= (u8
)((rx_info
->beacon_silence_rssi_c
&
847 ALL_BAND_FILTER
) >> 8);
849 val
= max(silence_rssi_b
, silence_rssi_c
);
850 max_silence_rssi
= max(silence_rssi_a
, (u8
) val
);
852 /* Store silence rssi in 20-beacon history table */
853 data
->nrg_silence_rssi
[data
->nrg_silence_idx
] = max_silence_rssi
;
854 data
->nrg_silence_idx
++;
855 if (data
->nrg_silence_idx
>= NRG_NUM_PREV_STAT_L
)
856 data
->nrg_silence_idx
= 0;
858 /* Find max silence rssi across 20 beacon history */
859 for (i
= 0; i
< NRG_NUM_PREV_STAT_L
; i
++) {
860 val
= data
->nrg_silence_rssi
[i
];
861 silence_ref
= max(silence_ref
, val
);
863 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
864 silence_rssi_a
, silence_rssi_b
, silence_rssi_c
,
867 /* Find max rx energy (min value!) among all 3 receivers,
868 * measured during beacon frame.
869 * Save it in 10-beacon history table. */
870 i
= data
->nrg_energy_idx
;
871 val
= min(rx_info
->beacon_energy_b
, rx_info
->beacon_energy_c
);
872 data
->nrg_value
[i
] = min(rx_info
->beacon_energy_a
, val
);
874 data
->nrg_energy_idx
++;
875 if (data
->nrg_energy_idx
>= 10)
876 data
->nrg_energy_idx
= 0;
878 /* Find min rx energy (max value) across 10 beacon history.
879 * This is the minimum signal level that we want to receive well.
880 * Add backoff (margin so we don't miss slightly lower energy frames).
881 * This establishes an upper bound (min value) for energy threshold. */
882 max_nrg_cck
= data
->nrg_value
[0];
883 for (i
= 1; i
< 10; i
++)
884 max_nrg_cck
= (u32
) max(max_nrg_cck
, (data
->nrg_value
[i
]));
887 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
888 rx_info
->beacon_energy_a
, rx_info
->beacon_energy_b
,
889 rx_info
->beacon_energy_c
, max_nrg_cck
- 6);
891 /* Count number of consecutive beacons with fewer-than-desired
893 if (false_alarms
< min_false_alarms
)
894 data
->num_in_cck_no_fa
++;
896 data
->num_in_cck_no_fa
= 0;
897 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
898 data
->num_in_cck_no_fa
);
900 /* If we got too many false alarms this time, reduce sensitivity */
901 if (false_alarms
> max_false_alarms
) {
902 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
903 false_alarms
, max_false_alarms
);
904 IWL_DEBUG_CALIB("... reducing sensitivity\n");
905 data
->nrg_curr_state
= IWL_FA_TOO_MANY
;
907 if (data
->auto_corr_cck
> AUTO_CORR_MAX_TH_CCK
) {
908 /* Store for "fewer than desired" on later beacon */
909 data
->nrg_silence_ref
= silence_ref
;
911 /* increase energy threshold (reduce nrg value)
912 * to decrease sensitivity */
913 if (data
->nrg_th_cck
> (NRG_MAX_CCK
+ NRG_STEP_CCK
))
914 data
->nrg_th_cck
= data
->nrg_th_cck
918 /* increase auto_corr values to decrease sensitivity */
919 if (data
->auto_corr_cck
< AUTO_CORR_MAX_TH_CCK
)
920 data
->auto_corr_cck
= AUTO_CORR_MAX_TH_CCK
+ 1;
922 val
= data
->auto_corr_cck
+ AUTO_CORR_STEP_CCK
;
923 data
->auto_corr_cck
= min((u32
)AUTO_CORR_MAX_CCK
, val
);
925 val
= data
->auto_corr_cck_mrc
+ AUTO_CORR_STEP_CCK
;
926 data
->auto_corr_cck_mrc
= min((u32
)AUTO_CORR_MAX_CCK_MRC
, val
);
928 /* Else if we got fewer than desired, increase sensitivity */
929 } else if (false_alarms
< min_false_alarms
) {
930 data
->nrg_curr_state
= IWL_FA_TOO_FEW
;
932 /* Compare silence level with silence level for most recent
933 * healthy number or too many false alarms */
934 data
->nrg_auto_corr_silence_diff
= (s32
)data
->nrg_silence_ref
-
937 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
938 false_alarms
, min_false_alarms
,
939 data
->nrg_auto_corr_silence_diff
);
941 /* Increase value to increase sensitivity, but only if:
942 * 1a) previous beacon did *not* have *too many* false alarms
943 * 1b) AND there's a significant difference in Rx levels
944 * from a previous beacon with too many, or healthy # FAs
945 * OR 2) We've seen a lot of beacons (100) with too few
947 if ((data
->nrg_prev_state
!= IWL_FA_TOO_MANY
) &&
948 ((data
->nrg_auto_corr_silence_diff
> NRG_DIFF
) ||
949 (data
->num_in_cck_no_fa
> MAX_NUMBER_CCK_NO_FA
))) {
951 IWL_DEBUG_CALIB("... increasing sensitivity\n");
952 /* Increase nrg value to increase sensitivity */
953 val
= data
->nrg_th_cck
+ NRG_STEP_CCK
;
954 data
->nrg_th_cck
= min((u32
)NRG_MIN_CCK
, val
);
956 /* Decrease auto_corr values to increase sensitivity */
957 val
= data
->auto_corr_cck
- AUTO_CORR_STEP_CCK
;
958 data
->auto_corr_cck
= max((u32
)AUTO_CORR_MIN_CCK
, val
);
960 val
= data
->auto_corr_cck_mrc
- AUTO_CORR_STEP_CCK
;
961 data
->auto_corr_cck_mrc
=
962 max((u32
)AUTO_CORR_MIN_CCK_MRC
, val
);
965 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
967 /* Else we got a healthy number of false alarms, keep status quo */
969 IWL_DEBUG_CALIB(" FA in safe zone\n");
970 data
->nrg_curr_state
= IWL_FA_GOOD_RANGE
;
972 /* Store for use in "fewer than desired" with later beacon */
973 data
->nrg_silence_ref
= silence_ref
;
975 /* If previous beacon had too many false alarms,
976 * give it some extra margin by reducing sensitivity again
977 * (but don't go below measured energy of desired Rx) */
978 if (IWL_FA_TOO_MANY
== data
->nrg_prev_state
) {
979 IWL_DEBUG_CALIB("... increasing margin\n");
980 data
->nrg_th_cck
-= NRG_MARGIN
;
984 /* Make sure the energy threshold does not go above the measured
985 * energy of the desired Rx signals (reduced by backoff margin),
986 * or else we might start missing Rx frames.
987 * Lower value is higher energy, so we use max()!
989 data
->nrg_th_cck
= max(max_nrg_cck
, data
->nrg_th_cck
);
990 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data
->nrg_th_cck
);
992 data
->nrg_prev_state
= data
->nrg_curr_state
;
998 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv
*priv
,
1003 u32 false_alarms
= norm_fa
* 200 * 1024;
1004 u32 max_false_alarms
= MAX_FA_OFDM
* rx_enable_time
;
1005 u32 min_false_alarms
= MIN_FA_OFDM
* rx_enable_time
;
1006 struct iwl4965_sensitivity_data
*data
= NULL
;
1008 data
= &(priv
->sensitivity_data
);
1010 /* If we got too many false alarms this time, reduce sensitivity */
1011 if (false_alarms
> max_false_alarms
) {
1013 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1014 false_alarms
, max_false_alarms
);
1016 val
= data
->auto_corr_ofdm
+ AUTO_CORR_STEP_OFDM
;
1017 data
->auto_corr_ofdm
=
1018 min((u32
)AUTO_CORR_MAX_OFDM
, val
);
1020 val
= data
->auto_corr_ofdm_mrc
+ AUTO_CORR_STEP_OFDM
;
1021 data
->auto_corr_ofdm_mrc
=
1022 min((u32
)AUTO_CORR_MAX_OFDM_MRC
, val
);
1024 val
= data
->auto_corr_ofdm_x1
+ AUTO_CORR_STEP_OFDM
;
1025 data
->auto_corr_ofdm_x1
=
1026 min((u32
)AUTO_CORR_MAX_OFDM_X1
, val
);
1028 val
= data
->auto_corr_ofdm_mrc_x1
+ AUTO_CORR_STEP_OFDM
;
1029 data
->auto_corr_ofdm_mrc_x1
=
1030 min((u32
)AUTO_CORR_MAX_OFDM_MRC_X1
, val
);
1033 /* Else if we got fewer than desired, increase sensitivity */
1034 else if (false_alarms
< min_false_alarms
) {
1036 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1037 false_alarms
, min_false_alarms
);
1039 val
= data
->auto_corr_ofdm
- AUTO_CORR_STEP_OFDM
;
1040 data
->auto_corr_ofdm
=
1041 max((u32
)AUTO_CORR_MIN_OFDM
, val
);
1043 val
= data
->auto_corr_ofdm_mrc
- AUTO_CORR_STEP_OFDM
;
1044 data
->auto_corr_ofdm_mrc
=
1045 max((u32
)AUTO_CORR_MIN_OFDM_MRC
, val
);
1047 val
= data
->auto_corr_ofdm_x1
- AUTO_CORR_STEP_OFDM
;
1048 data
->auto_corr_ofdm_x1
=
1049 max((u32
)AUTO_CORR_MIN_OFDM_X1
, val
);
1051 val
= data
->auto_corr_ofdm_mrc_x1
- AUTO_CORR_STEP_OFDM
;
1052 data
->auto_corr_ofdm_mrc_x1
=
1053 max((u32
)AUTO_CORR_MIN_OFDM_MRC_X1
, val
);
1057 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1058 min_false_alarms
, false_alarms
, max_false_alarms
);
1063 static int iwl4965_sensitivity_callback(struct iwl4965_priv
*priv
,
1064 struct iwl4965_cmd
*cmd
, struct sk_buff
*skb
)
1066 /* We didn't cache the SKB; let the caller free it */
1070 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1071 static int iwl4965_sensitivity_write(struct iwl4965_priv
*priv
, u8 flags
)
1074 struct iwl4965_sensitivity_cmd cmd
;
1075 struct iwl4965_sensitivity_data
*data
= NULL
;
1076 struct iwl4965_host_cmd cmd_out
= {
1077 .id
= SENSITIVITY_CMD
,
1078 .len
= sizeof(struct iwl4965_sensitivity_cmd
),
1079 .meta
.flags
= flags
,
1083 data
= &(priv
->sensitivity_data
);
1085 memset(&cmd
, 0, sizeof(cmd
));
1087 cmd
.table
[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX
] =
1088 cpu_to_le16((u16
)data
->auto_corr_ofdm
);
1089 cmd
.table
[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX
] =
1090 cpu_to_le16((u16
)data
->auto_corr_ofdm_mrc
);
1091 cmd
.table
[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX
] =
1092 cpu_to_le16((u16
)data
->auto_corr_ofdm_x1
);
1093 cmd
.table
[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX
] =
1094 cpu_to_le16((u16
)data
->auto_corr_ofdm_mrc_x1
);
1096 cmd
.table
[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX
] =
1097 cpu_to_le16((u16
)data
->auto_corr_cck
);
1098 cmd
.table
[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX
] =
1099 cpu_to_le16((u16
)data
->auto_corr_cck_mrc
);
1101 cmd
.table
[HD_MIN_ENERGY_CCK_DET_INDEX
] =
1102 cpu_to_le16((u16
)data
->nrg_th_cck
);
1103 cmd
.table
[HD_MIN_ENERGY_OFDM_DET_INDEX
] =
1104 cpu_to_le16((u16
)data
->nrg_th_ofdm
);
1106 cmd
.table
[HD_BARKER_CORR_TH_ADD_MIN_INDEX
] =
1107 __constant_cpu_to_le16(190);
1108 cmd
.table
[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX
] =
1109 __constant_cpu_to_le16(390);
1110 cmd
.table
[HD_OFDM_ENERGY_TH_IN_INDEX
] =
1111 __constant_cpu_to_le16(62);
1113 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1114 data
->auto_corr_ofdm
, data
->auto_corr_ofdm_mrc
,
1115 data
->auto_corr_ofdm_x1
, data
->auto_corr_ofdm_mrc_x1
,
1118 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1119 data
->auto_corr_cck
, data
->auto_corr_cck_mrc
,
1122 /* Update uCode's "work" table, and copy it to DSP */
1123 cmd
.control
= SENSITIVITY_CMD_CONTROL_WORK_TABLE
;
1125 if (flags
& CMD_ASYNC
)
1126 cmd_out
.meta
.u
.callback
= iwl4965_sensitivity_callback
;
1128 /* Don't send command to uCode if nothing has changed */
1129 if (!memcmp(&cmd
.table
[0], &(priv
->sensitivity_tbl
[0]),
1130 sizeof(u16
)*HD_TABLE_SIZE
)) {
1131 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1135 /* Copy table for comparison next time */
1136 memcpy(&(priv
->sensitivity_tbl
[0]), &(cmd
.table
[0]),
1137 sizeof(u16
)*HD_TABLE_SIZE
);
1139 rc
= iwl4965_send_cmd(priv
, &cmd_out
);
1141 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1148 void iwl4965_init_sensitivity(struct iwl4965_priv
*priv
, u8 flags
, u8 force
)
1152 struct iwl4965_sensitivity_data
*data
= NULL
;
1154 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1157 memset(&(priv
->sensitivity_tbl
[0]), 0,
1158 sizeof(u16
)*HD_TABLE_SIZE
);
1160 /* Clear driver's sensitivity algo data */
1161 data
= &(priv
->sensitivity_data
);
1162 memset(data
, 0, sizeof(struct iwl4965_sensitivity_data
));
1164 data
->num_in_cck_no_fa
= 0;
1165 data
->nrg_curr_state
= IWL_FA_TOO_MANY
;
1166 data
->nrg_prev_state
= IWL_FA_TOO_MANY
;
1167 data
->nrg_silence_ref
= 0;
1168 data
->nrg_silence_idx
= 0;
1169 data
->nrg_energy_idx
= 0;
1171 for (i
= 0; i
< 10; i
++)
1172 data
->nrg_value
[i
] = 0;
1174 for (i
= 0; i
< NRG_NUM_PREV_STAT_L
; i
++)
1175 data
->nrg_silence_rssi
[i
] = 0;
1177 data
->auto_corr_ofdm
= 90;
1178 data
->auto_corr_ofdm_mrc
= 170;
1179 data
->auto_corr_ofdm_x1
= 105;
1180 data
->auto_corr_ofdm_mrc_x1
= 220;
1181 data
->auto_corr_cck
= AUTO_CORR_CCK_MIN_VAL_DEF
;
1182 data
->auto_corr_cck_mrc
= 200;
1183 data
->nrg_th_cck
= 100;
1184 data
->nrg_th_ofdm
= 100;
1186 data
->last_bad_plcp_cnt_ofdm
= 0;
1187 data
->last_fa_cnt_ofdm
= 0;
1188 data
->last_bad_plcp_cnt_cck
= 0;
1189 data
->last_fa_cnt_cck
= 0;
1191 /* Clear prior Sensitivity command data to force send to uCode */
1193 memset(&(priv
->sensitivity_tbl
[0]), 0,
1194 sizeof(u16
)*HD_TABLE_SIZE
);
1196 rc
|= iwl4965_sensitivity_write(priv
, flags
);
1197 IWL_DEBUG_CALIB("<<return 0x%X\n", rc
);
1203 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1204 * Called after every association, but this runs only once!
1205 * ... once chain noise is calibrated the first time, it's good forever. */
1206 void iwl4965_chain_noise_reset(struct iwl4965_priv
*priv
)
1208 struct iwl4965_chain_noise_data
*data
= NULL
;
1211 data
= &(priv
->chain_noise_data
);
1212 if ((data
->state
== IWL_CHAIN_NOISE_ALIVE
) && iwl4965_is_associated(priv
)) {
1213 struct iwl4965_calibration_cmd cmd
;
1215 memset(&cmd
, 0, sizeof(cmd
));
1216 cmd
.opCode
= PHY_CALIBRATE_DIFF_GAIN_CMD
;
1217 cmd
.diff_gain_a
= 0;
1218 cmd
.diff_gain_b
= 0;
1219 cmd
.diff_gain_c
= 0;
1220 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_PHY_CALIBRATION_CMD
,
1223 data
->state
= IWL_CHAIN_NOISE_ACCUMULATE
;
1224 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1230 * Accumulate 20 beacons of signal and noise statistics for each of
1231 * 3 receivers/antennas/rx-chains, then figure out:
1232 * 1) Which antennas are connected.
1233 * 2) Differential rx gain settings to balance the 3 receivers.
1235 static void iwl4965_noise_calibration(struct iwl4965_priv
*priv
,
1236 struct iwl4965_notif_statistics
*stat_resp
)
1238 struct iwl4965_chain_noise_data
*data
= NULL
;
1247 u32 average_sig
[NUM_RX_CHAINS
] = {INITIALIZATION_VALUE
};
1248 u32 average_noise
[NUM_RX_CHAINS
] = {INITIALIZATION_VALUE
};
1249 u32 max_average_sig
;
1250 u16 max_average_sig_antenna_i
;
1251 u32 min_average_noise
= MIN_AVERAGE_NOISE_MAX_VALUE
;
1252 u16 min_average_noise_antenna_i
= INITIALIZATION_VALUE
;
1254 u16 chan_num
= INITIALIZATION_VALUE
;
1255 u32 band
= INITIALIZATION_VALUE
;
1256 u32 active_chains
= 0;
1257 unsigned long flags
;
1258 struct statistics_rx_non_phy
*rx_info
= &(stat_resp
->rx
.general
);
1260 data
= &(priv
->chain_noise_data
);
1262 /* Accumulate just the first 20 beacons after the first association,
1263 * then we're done forever. */
1264 if (data
->state
!= IWL_CHAIN_NOISE_ACCUMULATE
) {
1265 if (data
->state
== IWL_CHAIN_NOISE_ALIVE
)
1266 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1270 spin_lock_irqsave(&priv
->lock
, flags
);
1271 if (rx_info
->interference_data_flag
!= INTERFERENCE_DATA_AVAILABLE
) {
1272 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1273 spin_unlock_irqrestore(&priv
->lock
, flags
);
1277 band
= (priv
->staging_rxon
.flags
& RXON_FLG_BAND_24G_MSK
) ? 0 : 1;
1278 chan_num
= le16_to_cpu(priv
->staging_rxon
.channel
);
1280 /* Make sure we accumulate data for just the associated channel
1281 * (even if scanning). */
1282 if ((chan_num
!= (le32_to_cpu(stat_resp
->flag
) >> 16)) ||
1283 ((STATISTICS_REPLY_FLG_BAND_24G_MSK
==
1284 (stat_resp
->flag
& STATISTICS_REPLY_FLG_BAND_24G_MSK
)) && band
)) {
1285 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1287 spin_unlock_irqrestore(&priv
->lock
, flags
);
1291 /* Accumulate beacon statistics values across 20 beacons */
1292 chain_noise_a
= le32_to_cpu(rx_info
->beacon_silence_rssi_a
) &
1294 chain_noise_b
= le32_to_cpu(rx_info
->beacon_silence_rssi_b
) &
1296 chain_noise_c
= le32_to_cpu(rx_info
->beacon_silence_rssi_c
) &
1299 chain_sig_a
= le32_to_cpu(rx_info
->beacon_rssi_a
) & IN_BAND_FILTER
;
1300 chain_sig_b
= le32_to_cpu(rx_info
->beacon_rssi_b
) & IN_BAND_FILTER
;
1301 chain_sig_c
= le32_to_cpu(rx_info
->beacon_rssi_c
) & IN_BAND_FILTER
;
1303 spin_unlock_irqrestore(&priv
->lock
, flags
);
1305 data
->beacon_count
++;
1307 data
->chain_noise_a
= (chain_noise_a
+ data
->chain_noise_a
);
1308 data
->chain_noise_b
= (chain_noise_b
+ data
->chain_noise_b
);
1309 data
->chain_noise_c
= (chain_noise_c
+ data
->chain_noise_c
);
1311 data
->chain_signal_a
= (chain_sig_a
+ data
->chain_signal_a
);
1312 data
->chain_signal_b
= (chain_sig_b
+ data
->chain_signal_b
);
1313 data
->chain_signal_c
= (chain_sig_c
+ data
->chain_signal_c
);
1315 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num
, band
,
1316 data
->beacon_count
);
1317 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1318 chain_sig_a
, chain_sig_b
, chain_sig_c
);
1319 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1320 chain_noise_a
, chain_noise_b
, chain_noise_c
);
1322 /* If this is the 20th beacon, determine:
1323 * 1) Disconnected antennas (using signal strengths)
1324 * 2) Differential gain (using silence noise) to balance receivers */
1325 if (data
->beacon_count
== CAL_NUM_OF_BEACONS
) {
1327 /* Analyze signal for disconnected antenna */
1328 average_sig
[0] = (data
->chain_signal_a
) / CAL_NUM_OF_BEACONS
;
1329 average_sig
[1] = (data
->chain_signal_b
) / CAL_NUM_OF_BEACONS
;
1330 average_sig
[2] = (data
->chain_signal_c
) / CAL_NUM_OF_BEACONS
;
1332 if (average_sig
[0] >= average_sig
[1]) {
1333 max_average_sig
= average_sig
[0];
1334 max_average_sig_antenna_i
= 0;
1335 active_chains
= (1 << max_average_sig_antenna_i
);
1337 max_average_sig
= average_sig
[1];
1338 max_average_sig_antenna_i
= 1;
1339 active_chains
= (1 << max_average_sig_antenna_i
);
1342 if (average_sig
[2] >= max_average_sig
) {
1343 max_average_sig
= average_sig
[2];
1344 max_average_sig_antenna_i
= 2;
1345 active_chains
= (1 << max_average_sig_antenna_i
);
1348 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1349 average_sig
[0], average_sig
[1], average_sig
[2]);
1350 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1351 max_average_sig
, max_average_sig_antenna_i
);
1353 /* Compare signal strengths for all 3 receivers. */
1354 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1355 if (i
!= max_average_sig_antenna_i
) {
1356 s32 rssi_delta
= (max_average_sig
-
1359 /* If signal is very weak, compared with
1360 * strongest, mark it as disconnected. */
1361 if (rssi_delta
> MAXIMUM_ALLOWED_PATHLOSS
)
1362 data
->disconn_array
[i
] = 1;
1364 active_chains
|= (1 << i
);
1365 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1366 "disconn_array[i] = %d\n",
1367 i
, rssi_delta
, data
->disconn_array
[i
]);
1371 /*If both chains A & B are disconnected -
1372 * connect B and leave A as is */
1373 if (data
->disconn_array
[CHAIN_A
] &&
1374 data
->disconn_array
[CHAIN_B
]) {
1375 data
->disconn_array
[CHAIN_B
] = 0;
1376 active_chains
|= (1 << CHAIN_B
);
1377 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1378 "W/A - declare B as connected\n");
1381 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1384 /* Save for use within RXON, TX, SCAN commands, etc. */
1385 priv
->valid_antenna
= active_chains
;
1387 /* Analyze noise for rx balance */
1388 average_noise
[0] = ((data
->chain_noise_a
)/CAL_NUM_OF_BEACONS
);
1389 average_noise
[1] = ((data
->chain_noise_b
)/CAL_NUM_OF_BEACONS
);
1390 average_noise
[2] = ((data
->chain_noise_c
)/CAL_NUM_OF_BEACONS
);
1392 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1393 if (!(data
->disconn_array
[i
]) &&
1394 (average_noise
[i
] <= min_average_noise
)) {
1395 /* This means that chain i is active and has
1396 * lower noise values so far: */
1397 min_average_noise
= average_noise
[i
];
1398 min_average_noise_antenna_i
= i
;
1402 data
->delta_gain_code
[min_average_noise_antenna_i
] = 0;
1404 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1405 average_noise
[0], average_noise
[1],
1408 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1409 min_average_noise
, min_average_noise_antenna_i
);
1411 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1414 if (!(data
->disconn_array
[i
]) &&
1415 (data
->delta_gain_code
[i
] ==
1416 CHAIN_NOISE_DELTA_GAIN_INIT_VAL
)) {
1417 delta_g
= average_noise
[i
] - min_average_noise
;
1418 data
->delta_gain_code
[i
] = (u8
)((delta_g
*
1420 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE
<
1421 data
->delta_gain_code
[i
])
1422 data
->delta_gain_code
[i
] =
1423 CHAIN_NOISE_MAX_DELTA_GAIN_CODE
;
1425 data
->delta_gain_code
[i
] =
1426 (data
->delta_gain_code
[i
] | (1 << 2));
1428 data
->delta_gain_code
[i
] = 0;
1430 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1431 data
->delta_gain_code
[0],
1432 data
->delta_gain_code
[1],
1433 data
->delta_gain_code
[2]);
1435 /* Differential gain gets sent to uCode only once */
1436 if (!data
->radio_write
) {
1437 struct iwl4965_calibration_cmd cmd
;
1438 data
->radio_write
= 1;
1440 memset(&cmd
, 0, sizeof(cmd
));
1441 cmd
.opCode
= PHY_CALIBRATE_DIFF_GAIN_CMD
;
1442 cmd
.diff_gain_a
= data
->delta_gain_code
[0];
1443 cmd
.diff_gain_b
= data
->delta_gain_code
[1];
1444 cmd
.diff_gain_c
= data
->delta_gain_code
[2];
1445 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_PHY_CALIBRATION_CMD
,
1448 IWL_DEBUG_CALIB("fail sending cmd "
1449 "REPLY_PHY_CALIBRATION_CMD \n");
1451 /* TODO we might want recalculate
1452 * rx_chain in rxon cmd */
1454 /* Mark so we run this algo only once! */
1455 data
->state
= IWL_CHAIN_NOISE_CALIBRATED
;
1457 data
->chain_noise_a
= 0;
1458 data
->chain_noise_b
= 0;
1459 data
->chain_noise_c
= 0;
1460 data
->chain_signal_a
= 0;
1461 data
->chain_signal_b
= 0;
1462 data
->chain_signal_c
= 0;
1463 data
->beacon_count
= 0;
1468 static void iwl4965_sensitivity_calibration(struct iwl4965_priv
*priv
,
1469 struct iwl4965_notif_statistics
*resp
)
1479 struct iwl4965_sensitivity_data
*data
= NULL
;
1480 struct statistics_rx_non_phy
*rx_info
= &(resp
->rx
.general
);
1481 struct statistics_rx
*statistics
= &(resp
->rx
);
1482 unsigned long flags
;
1483 struct statistics_general_data statis
;
1485 data
= &(priv
->sensitivity_data
);
1487 if (!iwl4965_is_associated(priv
)) {
1488 IWL_DEBUG_CALIB("<< - not associated\n");
1492 spin_lock_irqsave(&priv
->lock
, flags
);
1493 if (rx_info
->interference_data_flag
!= INTERFERENCE_DATA_AVAILABLE
) {
1494 IWL_DEBUG_CALIB("<< invalid data.\n");
1495 spin_unlock_irqrestore(&priv
->lock
, flags
);
1499 /* Extract Statistics: */
1500 rx_enable_time
= le32_to_cpu(rx_info
->channel_load
);
1501 fa_cck
= le32_to_cpu(statistics
->cck
.false_alarm_cnt
);
1502 fa_ofdm
= le32_to_cpu(statistics
->ofdm
.false_alarm_cnt
);
1503 bad_plcp_cck
= le32_to_cpu(statistics
->cck
.plcp_err
);
1504 bad_plcp_ofdm
= le32_to_cpu(statistics
->ofdm
.plcp_err
);
1506 statis
.beacon_silence_rssi_a
=
1507 le32_to_cpu(statistics
->general
.beacon_silence_rssi_a
);
1508 statis
.beacon_silence_rssi_b
=
1509 le32_to_cpu(statistics
->general
.beacon_silence_rssi_b
);
1510 statis
.beacon_silence_rssi_c
=
1511 le32_to_cpu(statistics
->general
.beacon_silence_rssi_c
);
1512 statis
.beacon_energy_a
=
1513 le32_to_cpu(statistics
->general
.beacon_energy_a
);
1514 statis
.beacon_energy_b
=
1515 le32_to_cpu(statistics
->general
.beacon_energy_b
);
1516 statis
.beacon_energy_c
=
1517 le32_to_cpu(statistics
->general
.beacon_energy_c
);
1519 spin_unlock_irqrestore(&priv
->lock
, flags
);
1521 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time
);
1523 if (!rx_enable_time
) {
1524 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1528 /* These statistics increase monotonically, and do not reset
1529 * at each beacon. Calculate difference from last value, or just
1530 * use the new statistics value if it has reset or wrapped around. */
1531 if (data
->last_bad_plcp_cnt_cck
> bad_plcp_cck
)
1532 data
->last_bad_plcp_cnt_cck
= bad_plcp_cck
;
1534 bad_plcp_cck
-= data
->last_bad_plcp_cnt_cck
;
1535 data
->last_bad_plcp_cnt_cck
+= bad_plcp_cck
;
1538 if (data
->last_bad_plcp_cnt_ofdm
> bad_plcp_ofdm
)
1539 data
->last_bad_plcp_cnt_ofdm
= bad_plcp_ofdm
;
1541 bad_plcp_ofdm
-= data
->last_bad_plcp_cnt_ofdm
;
1542 data
->last_bad_plcp_cnt_ofdm
+= bad_plcp_ofdm
;
1545 if (data
->last_fa_cnt_ofdm
> fa_ofdm
)
1546 data
->last_fa_cnt_ofdm
= fa_ofdm
;
1548 fa_ofdm
-= data
->last_fa_cnt_ofdm
;
1549 data
->last_fa_cnt_ofdm
+= fa_ofdm
;
1552 if (data
->last_fa_cnt_cck
> fa_cck
)
1553 data
->last_fa_cnt_cck
= fa_cck
;
1555 fa_cck
-= data
->last_fa_cnt_cck
;
1556 data
->last_fa_cnt_cck
+= fa_cck
;
1559 /* Total aborted signal locks */
1560 norm_fa_ofdm
= fa_ofdm
+ bad_plcp_ofdm
;
1561 norm_fa_cck
= fa_cck
+ bad_plcp_cck
;
1563 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck
,
1564 bad_plcp_cck
, fa_ofdm
, bad_plcp_ofdm
);
1566 iwl4965_sens_auto_corr_ofdm(priv
, norm_fa_ofdm
, rx_enable_time
);
1567 iwl4965_sens_energy_cck(priv
, norm_fa_cck
, rx_enable_time
, &statis
);
1568 rc
|= iwl4965_sensitivity_write(priv
, CMD_ASYNC
);
1573 static void iwl4965_bg_sensitivity_work(struct work_struct
*work
)
1575 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
1578 mutex_lock(&priv
->mutex
);
1580 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
1581 test_bit(STATUS_SCANNING
, &priv
->status
)) {
1582 mutex_unlock(&priv
->mutex
);
1586 if (priv
->start_calib
) {
1587 iwl4965_noise_calibration(priv
, &priv
->statistics
);
1589 if (priv
->sensitivity_data
.state
==
1590 IWL_SENS_CALIB_NEED_REINIT
) {
1591 iwl4965_init_sensitivity(priv
, CMD_ASYNC
, 0);
1592 priv
->sensitivity_data
.state
= IWL_SENS_CALIB_ALLOWED
;
1594 iwl4965_sensitivity_calibration(priv
,
1598 mutex_unlock(&priv
->mutex
);
1601 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1603 static void iwl4965_bg_txpower_work(struct work_struct
*work
)
1605 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
1608 /* If a scan happened to start before we got here
1609 * then just return; the statistics notification will
1610 * kick off another scheduled work to compensate for
1611 * any temperature delta we missed here. */
1612 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
1613 test_bit(STATUS_SCANNING
, &priv
->status
))
1616 mutex_lock(&priv
->mutex
);
1618 /* Regardless of if we are assocaited, we must reconfigure the
1619 * TX power since frames can be sent on non-radar channels while
1621 iwl4965_hw_reg_send_txpower(priv
);
1623 /* Update last_temperature to keep is_calib_needed from running
1624 * when it isn't needed... */
1625 priv
->last_temperature
= priv
->temperature
;
1627 mutex_unlock(&priv
->mutex
);
1631 * Acquire priv->lock before calling this function !
1633 static void iwl4965_set_wr_ptrs(struct iwl4965_priv
*priv
, int txq_id
, u32 index
)
1635 iwl4965_write_direct32(priv
, HBUS_TARG_WRPTR
,
1636 (index
& 0xff) | (txq_id
<< 8));
1637 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_RDPTR(txq_id
), index
);
1641 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1642 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1643 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1645 * NOTE: Acquire priv->lock before calling this function !
1647 static void iwl4965_tx_queue_set_status(struct iwl4965_priv
*priv
,
1648 struct iwl4965_tx_queue
*txq
,
1649 int tx_fifo_id
, int scd_retry
)
1651 int txq_id
= txq
->q
.id
;
1653 /* Find out whether to activate Tx queue */
1654 int active
= test_bit(txq_id
, &priv
->txq_ctx_active_msk
)?1:0;
1656 /* Set up and activate */
1657 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_STATUS_BITS(txq_id
),
1658 (active
<< SCD_QUEUE_STTS_REG_POS_ACTIVE
) |
1659 (tx_fifo_id
<< SCD_QUEUE_STTS_REG_POS_TXF
) |
1660 (scd_retry
<< SCD_QUEUE_STTS_REG_POS_WSL
) |
1661 (scd_retry
<< SCD_QUEUE_STTS_REG_POS_SCD_ACK
) |
1662 SCD_QUEUE_STTS_REG_MSK
);
1664 txq
->sched_retry
= scd_retry
;
1666 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1667 active
? "Activate" : "Deactivate",
1668 scd_retry
? "BA" : "AC", txq_id
, tx_fifo_id
);
1671 static const u16 default_queue_to_tx_fifo
[] = {
1681 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv
*priv
, int txq_id
)
1683 set_bit(txq_id
, &priv
->txq_ctx_active_msk
);
1686 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv
*priv
, int txq_id
)
1688 clear_bit(txq_id
, &priv
->txq_ctx_active_msk
);
1691 int iwl4965_alive_notify(struct iwl4965_priv
*priv
)
1695 unsigned long flags
;
1698 spin_lock_irqsave(&priv
->lock
, flags
);
1700 #ifdef CONFIG_IWL4965_SENSITIVITY
1701 memset(&(priv
->sensitivity_data
), 0,
1702 sizeof(struct iwl4965_sensitivity_data
));
1703 memset(&(priv
->chain_noise_data
), 0,
1704 sizeof(struct iwl4965_chain_noise_data
));
1705 for (i
= 0; i
< NUM_RX_CHAINS
; i
++)
1706 priv
->chain_noise_data
.delta_gain_code
[i
] =
1707 CHAIN_NOISE_DELTA_GAIN_INIT_VAL
;
1708 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1709 rc
= iwl4965_grab_nic_access(priv
);
1711 spin_unlock_irqrestore(&priv
->lock
, flags
);
1715 /* Clear 4965's internal Tx Scheduler data base */
1716 priv
->scd_base_addr
= iwl4965_read_prph(priv
, KDR_SCD_SRAM_BASE_ADDR
);
1717 a
= priv
->scd_base_addr
+ SCD_CONTEXT_DATA_OFFSET
;
1718 for (; a
< priv
->scd_base_addr
+ SCD_TX_STTS_BITMAP_OFFSET
; a
+= 4)
1719 iwl4965_write_targ_mem(priv
, a
, 0);
1720 for (; a
< priv
->scd_base_addr
+ SCD_TRANSLATE_TBL_OFFSET
; a
+= 4)
1721 iwl4965_write_targ_mem(priv
, a
, 0);
1722 for (; a
< sizeof(u16
) * priv
->hw_setting
.max_txq_num
; a
+= 4)
1723 iwl4965_write_targ_mem(priv
, a
, 0);
1725 /* Tel 4965 where to find Tx byte count tables */
1726 iwl4965_write_prph(priv
, KDR_SCD_DRAM_BASE_ADDR
,
1727 (priv
->hw_setting
.shared_phys
+
1728 offsetof(struct iwl4965_shared
, queues_byte_cnt_tbls
)) >> 10);
1730 /* Disable chain mode for all queues */
1731 iwl4965_write_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, 0);
1733 /* Initialize each Tx queue (including the command queue) */
1734 for (i
= 0; i
< priv
->hw_setting
.max_txq_num
; i
++) {
1736 /* TFD circular buffer read/write indexes */
1737 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_RDPTR(i
), 0);
1738 iwl4965_write_direct32(priv
, HBUS_TARG_WRPTR
, 0 | (i
<< 8));
1740 /* Max Tx Window size for Scheduler-ACK mode */
1741 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
1742 SCD_CONTEXT_QUEUE_OFFSET(i
),
1744 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS
) &
1745 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK
);
1748 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
1749 SCD_CONTEXT_QUEUE_OFFSET(i
) +
1752 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS
) &
1753 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK
);
1756 iwl4965_write_prph(priv
, KDR_SCD_INTERRUPT_MASK
,
1757 (1 << priv
->hw_setting
.max_txq_num
) - 1);
1759 /* Activate all Tx DMA/FIFO channels */
1760 iwl4965_write_prph(priv
, KDR_SCD_TXFACT
,
1761 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1763 iwl4965_set_wr_ptrs(priv
, IWL_CMD_QUEUE_NUM
, 0);
1765 /* Map each Tx/cmd queue to its corresponding fifo */
1766 for (i
= 0; i
< ARRAY_SIZE(default_queue_to_tx_fifo
); i
++) {
1767 int ac
= default_queue_to_tx_fifo
[i
];
1768 iwl4965_txq_ctx_activate(priv
, i
);
1769 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[i
], ac
, 0);
1772 iwl4965_release_nic_access(priv
);
1773 spin_unlock_irqrestore(&priv
->lock
, flags
);
1779 * iwl4965_hw_set_hw_setting
1781 * Called when initializing driver
1783 int iwl4965_hw_set_hw_setting(struct iwl4965_priv
*priv
)
1785 /* Allocate area for Tx byte count tables and Rx queue status */
1786 priv
->hw_setting
.shared_virt
=
1787 pci_alloc_consistent(priv
->pci_dev
,
1788 sizeof(struct iwl4965_shared
),
1789 &priv
->hw_setting
.shared_phys
);
1791 if (!priv
->hw_setting
.shared_virt
)
1794 memset(priv
->hw_setting
.shared_virt
, 0, sizeof(struct iwl4965_shared
));
1796 priv
->hw_setting
.max_txq_num
= iwl4965_param_queues_num
;
1797 priv
->hw_setting
.ac_queue_count
= AC_NUM
;
1798 priv
->hw_setting
.tx_cmd_len
= sizeof(struct iwl4965_tx_cmd
);
1799 priv
->hw_setting
.max_rxq_size
= RX_QUEUE_SIZE
;
1800 priv
->hw_setting
.max_rxq_log
= RX_QUEUE_SIZE_LOG
;
1801 if (iwl4965_param_amsdu_size_8K
)
1802 priv
->hw_setting
.rx_buf_size
= IWL_RX_BUF_SIZE_8K
;
1804 priv
->hw_setting
.rx_buf_size
= IWL_RX_BUF_SIZE_4K
;
1805 priv
->hw_setting
.max_pkt_size
= priv
->hw_setting
.rx_buf_size
- 256;
1806 priv
->hw_setting
.max_stations
= IWL4965_STATION_COUNT
;
1807 priv
->hw_setting
.bcast_sta_id
= IWL4965_BROADCAST_ID
;
1812 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1814 * Destroy all TX DMA queues and structures
1816 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv
*priv
)
1821 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++)
1822 iwl4965_tx_queue_free(priv
, &priv
->txq
[txq_id
]);
1824 /* Keep-warm buffer */
1825 iwl4965_kw_free(priv
);
1829 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1831 * Does NOT advance any TFD circular buffer read/write indexes
1832 * Does NOT free the TFD itself (which is within circular buffer)
1834 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv
*priv
, struct iwl4965_tx_queue
*txq
)
1836 struct iwl4965_tfd_frame
*bd_tmp
= (struct iwl4965_tfd_frame
*)&txq
->bd
[0];
1837 struct iwl4965_tfd_frame
*bd
= &bd_tmp
[txq
->q
.read_ptr
];
1838 struct pci_dev
*dev
= priv
->pci_dev
;
1843 /* Host command buffers stay mapped in memory, nothing to clean */
1844 if (txq
->q
.id
== IWL_CMD_QUEUE_NUM
)
1847 /* Sanity check on number of chunks */
1848 counter
= IWL_GET_BITS(*bd
, num_tbs
);
1849 if (counter
> MAX_NUM_OF_TBS
) {
1850 IWL_ERROR("Too many chunks: %i\n", counter
);
1851 /* @todo issue fatal error, it is quite serious situation */
1855 /* Unmap chunks, if any.
1856 * TFD info for odd chunks is different format than for even chunks. */
1857 for (i
= 0; i
< counter
; i
++) {
1864 IWL_GET_BITS(bd
->pa
[index
], tb2_addr_lo16
) |
1865 (IWL_GET_BITS(bd
->pa
[index
],
1866 tb2_addr_hi20
) << 16),
1867 IWL_GET_BITS(bd
->pa
[index
], tb2_len
),
1871 pci_unmap_single(dev
,
1872 le32_to_cpu(bd
->pa
[index
].tb1_addr
),
1873 IWL_GET_BITS(bd
->pa
[index
], tb1_len
),
1876 /* Free SKB, if any, for this chunk */
1877 if (txq
->txb
[txq
->q
.read_ptr
].skb
[i
]) {
1878 struct sk_buff
*skb
= txq
->txb
[txq
->q
.read_ptr
].skb
[i
];
1881 txq
->txb
[txq
->q
.read_ptr
].skb
[i
] = NULL
;
1887 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv
*priv
, s8 power
)
1889 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1893 static s32
iwl4965_math_div_round(s32 num
, s32 denom
, s32
*res
)
1906 *res
= ((num
* 2 + denom
) / (denom
* 2)) * sign
;
1912 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1914 * Determines power supply voltage compensation for txpower calculations.
1915 * Returns number of 1/2-dB steps to subtract from gain table index,
1916 * to compensate for difference between power supply voltage during
1917 * factory measurements, vs. current power supply voltage.
1919 * Voltage indication is higher for lower voltage.
1920 * Lower voltage requires more gain (lower gain table index).
1922 static s32
iwl4965_get_voltage_compensation(s32 eeprom_voltage
,
1923 s32 current_voltage
)
1927 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE
== eeprom_voltage
) ||
1928 (TX_POWER_IWL_ILLEGAL_VOLTAGE
== current_voltage
))
1931 iwl4965_math_div_round(current_voltage
- eeprom_voltage
,
1932 TX_POWER_IWL_VOLTAGE_CODES_PER_03V
, &comp
);
1934 if (current_voltage
> eeprom_voltage
)
1936 if ((comp
< -2) || (comp
> 2))
1942 static const struct iwl4965_channel_info
*
1943 iwl4965_get_channel_txpower_info(struct iwl4965_priv
*priv
,
1944 enum ieee80211_band band
, u16 channel
)
1946 const struct iwl4965_channel_info
*ch_info
;
1948 ch_info
= iwl4965_get_channel_info(priv
, band
, channel
);
1950 if (!is_channel_valid(ch_info
))
1956 static s32
iwl4965_get_tx_atten_grp(u16 channel
)
1958 if (channel
>= CALIB_IWL_TX_ATTEN_GR5_FCH
&&
1959 channel
<= CALIB_IWL_TX_ATTEN_GR5_LCH
)
1960 return CALIB_CH_GROUP_5
;
1962 if (channel
>= CALIB_IWL_TX_ATTEN_GR1_FCH
&&
1963 channel
<= CALIB_IWL_TX_ATTEN_GR1_LCH
)
1964 return CALIB_CH_GROUP_1
;
1966 if (channel
>= CALIB_IWL_TX_ATTEN_GR2_FCH
&&
1967 channel
<= CALIB_IWL_TX_ATTEN_GR2_LCH
)
1968 return CALIB_CH_GROUP_2
;
1970 if (channel
>= CALIB_IWL_TX_ATTEN_GR3_FCH
&&
1971 channel
<= CALIB_IWL_TX_ATTEN_GR3_LCH
)
1972 return CALIB_CH_GROUP_3
;
1974 if (channel
>= CALIB_IWL_TX_ATTEN_GR4_FCH
&&
1975 channel
<= CALIB_IWL_TX_ATTEN_GR4_LCH
)
1976 return CALIB_CH_GROUP_4
;
1978 IWL_ERROR("Can't find txatten group for channel %d.\n", channel
);
1982 static u32
iwl4965_get_sub_band(const struct iwl4965_priv
*priv
, u32 channel
)
1986 for (b
= 0; b
< EEPROM_TX_POWER_BANDS
; b
++) {
1987 if (priv
->eeprom
.calib_info
.band_info
[b
].ch_from
== 0)
1990 if ((channel
>= priv
->eeprom
.calib_info
.band_info
[b
].ch_from
)
1991 && (channel
<= priv
->eeprom
.calib_info
.band_info
[b
].ch_to
))
1998 static s32
iwl4965_interpolate_value(s32 x
, s32 x1
, s32 y1
, s32 x2
, s32 y2
)
2005 iwl4965_math_div_round((x2
- x
) * (y1
- y2
), (x2
- x1
), &val
);
2011 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2013 * Interpolates factory measurements from the two sample channels within a
2014 * sub-band, to apply to channel of interest. Interpolation is proportional to
2015 * differences in channel frequencies, which is proportional to differences
2016 * in channel number.
2018 static int iwl4965_interpolate_chan(struct iwl4965_priv
*priv
, u32 channel
,
2019 struct iwl4965_eeprom_calib_ch_info
*chan_info
)
2024 const struct iwl4965_eeprom_calib_measure
*m1
;
2025 const struct iwl4965_eeprom_calib_measure
*m2
;
2026 struct iwl4965_eeprom_calib_measure
*omeas
;
2030 s
= iwl4965_get_sub_band(priv
, channel
);
2031 if (s
>= EEPROM_TX_POWER_BANDS
) {
2032 IWL_ERROR("Tx Power can not find channel %d ", channel
);
2036 ch_i1
= priv
->eeprom
.calib_info
.band_info
[s
].ch1
.ch_num
;
2037 ch_i2
= priv
->eeprom
.calib_info
.band_info
[s
].ch2
.ch_num
;
2038 chan_info
->ch_num
= (u8
) channel
;
2040 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2041 channel
, s
, ch_i1
, ch_i2
);
2043 for (c
= 0; c
< EEPROM_TX_POWER_TX_CHAINS
; c
++) {
2044 for (m
= 0; m
< EEPROM_TX_POWER_MEASUREMENTS
; m
++) {
2045 m1
= &(priv
->eeprom
.calib_info
.band_info
[s
].ch1
.
2046 measurements
[c
][m
]);
2047 m2
= &(priv
->eeprom
.calib_info
.band_info
[s
].ch2
.
2048 measurements
[c
][m
]);
2049 omeas
= &(chan_info
->measurements
[c
][m
]);
2052 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2057 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2058 m1
->gain_idx
, ch_i2
,
2060 omeas
->temperature
=
2061 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2066 (s8
) iwl4965_interpolate_value(channel
, ch_i1
,
2071 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c
, m
,
2072 m1
->actual_pow
, m2
->actual_pow
, omeas
->actual_pow
);
2074 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c
, m
,
2075 m1
->gain_idx
, m2
->gain_idx
, omeas
->gain_idx
);
2077 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c
, m
,
2078 m1
->pa_det
, m2
->pa_det
, omeas
->pa_det
);
2080 ("chain %d meas %d T1=%d T2=%d T=%d\n", c
, m
,
2081 m1
->temperature
, m2
->temperature
,
2082 omeas
->temperature
);
2089 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2090 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2091 static s32 back_off_table
[] = {
2092 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2093 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2094 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2095 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2099 /* Thermal compensation values for txpower for various frequency ranges ...
2100 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2101 static struct iwl4965_txpower_comp_entry
{
2102 s32 degrees_per_05db_a
;
2103 s32 degrees_per_05db_a_denom
;
2104 } tx_power_cmp_tble
[CALIB_CH_GROUP_MAX
] = {
2105 {9, 2}, /* group 0 5.2, ch 34-43 */
2106 {4, 1}, /* group 1 5.2, ch 44-70 */
2107 {4, 1}, /* group 2 5.2, ch 71-124 */
2108 {4, 1}, /* group 3 5.2, ch 125-200 */
2109 {3, 1} /* group 4 2.4, ch all */
2112 static s32
get_min_power_index(s32 rate_power_index
, u32 band
)
2115 if ((rate_power_index
& 7) <= 4)
2116 return MIN_TX_GAIN_INDEX_52GHZ_EXT
;
2118 return MIN_TX_GAIN_INDEX
;
2126 static const struct gain_entry gain_table
[2][108] = {
2127 /* 5.2GHz power gain index table */
2129 {123, 0x3F}, /* highest txpower */
2238 /* 2.4GHz power gain index table */
2240 {110, 0x3f}, /* highest txpower */
2351 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv
*priv
, u8 band
, u16 channel
,
2352 u8 is_fat
, u8 ctrl_chan_high
,
2353 struct iwl4965_tx_power_db
*tx_power_tbl
)
2355 u8 saturation_power
;
2357 s32 user_target_power
;
2361 s32 current_regulatory
;
2362 s32 txatten_grp
= CALIB_CH_GROUP_MAX
;
2365 const struct iwl4965_channel_info
*ch_info
= NULL
;
2366 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info
;
2367 const struct iwl4965_eeprom_calib_measure
*measurement
;
2370 s32 voltage_compensation
;
2371 s32 degrees_per_05db_num
;
2372 s32 degrees_per_05db_denom
;
2374 s32 temperature_comp
[2];
2375 s32 factory_gain_index
[2];
2376 s32 factory_actual_pwr
[2];
2379 /* Sanity check requested level (dBm) */
2380 if (priv
->user_txpower_limit
< IWL_TX_POWER_TARGET_POWER_MIN
) {
2381 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2382 priv
->user_txpower_limit
);
2385 if (priv
->user_txpower_limit
> IWL_TX_POWER_TARGET_POWER_MAX
) {
2386 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2387 priv
->user_txpower_limit
);
2391 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2392 * are used for indexing into txpower table) */
2393 user_target_power
= 2 * priv
->user_txpower_limit
;
2395 /* Get current (RXON) channel, band, width */
2397 iwl4965_get_channel_txpower_info(priv
, priv
->band
, channel
);
2399 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel
, band
,
2405 /* get txatten group, used to select 1) thermal txpower adjustment
2406 * and 2) mimo txpower balance between Tx chains. */
2407 txatten_grp
= iwl4965_get_tx_atten_grp(channel
);
2408 if (txatten_grp
< 0)
2411 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2412 channel
, txatten_grp
);
2421 /* hardware txpower limits ...
2422 * saturation (clipping distortion) txpowers are in half-dBm */
2424 saturation_power
= priv
->eeprom
.calib_info
.saturation_power24
;
2426 saturation_power
= priv
->eeprom
.calib_info
.saturation_power52
;
2428 if (saturation_power
< IWL_TX_POWER_SATURATION_MIN
||
2429 saturation_power
> IWL_TX_POWER_SATURATION_MAX
) {
2431 saturation_power
= IWL_TX_POWER_DEFAULT_SATURATION_24
;
2433 saturation_power
= IWL_TX_POWER_DEFAULT_SATURATION_52
;
2436 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2437 * max_power_avg values are in dBm, convert * 2 */
2439 reg_limit
= ch_info
->fat_max_power_avg
* 2;
2441 reg_limit
= ch_info
->max_power_avg
* 2;
2443 if ((reg_limit
< IWL_TX_POWER_REGULATORY_MIN
) ||
2444 (reg_limit
> IWL_TX_POWER_REGULATORY_MAX
)) {
2446 reg_limit
= IWL_TX_POWER_DEFAULT_REGULATORY_24
;
2448 reg_limit
= IWL_TX_POWER_DEFAULT_REGULATORY_52
;
2451 /* Interpolate txpower calibration values for this channel,
2452 * based on factory calibration tests on spaced channels. */
2453 iwl4965_interpolate_chan(priv
, channel
, &ch_eeprom_info
);
2455 /* calculate tx gain adjustment based on power supply voltage */
2456 voltage
= priv
->eeprom
.calib_info
.voltage
;
2457 init_voltage
= (s32
)le32_to_cpu(priv
->card_alive_init
.voltage
);
2458 voltage_compensation
=
2459 iwl4965_get_voltage_compensation(voltage
, init_voltage
);
2461 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2463 voltage
, voltage_compensation
);
2465 /* get current temperature (Celsius) */
2466 current_temp
= max(priv
->temperature
, IWL_TX_POWER_TEMPERATURE_MIN
);
2467 current_temp
= min(priv
->temperature
, IWL_TX_POWER_TEMPERATURE_MAX
);
2468 current_temp
= KELVIN_TO_CELSIUS(current_temp
);
2470 /* select thermal txpower adjustment params, based on channel group
2471 * (same frequency group used for mimo txatten adjustment) */
2472 degrees_per_05db_num
=
2473 tx_power_cmp_tble
[txatten_grp
].degrees_per_05db_a
;
2474 degrees_per_05db_denom
=
2475 tx_power_cmp_tble
[txatten_grp
].degrees_per_05db_a_denom
;
2477 /* get per-chain txpower values from factory measurements */
2478 for (c
= 0; c
< 2; c
++) {
2479 measurement
= &ch_eeprom_info
.measurements
[c
][1];
2481 /* txgain adjustment (in half-dB steps) based on difference
2482 * between factory and current temperature */
2483 factory_temp
= measurement
->temperature
;
2484 iwl4965_math_div_round((current_temp
- factory_temp
) *
2485 degrees_per_05db_denom
,
2486 degrees_per_05db_num
,
2487 &temperature_comp
[c
]);
2489 factory_gain_index
[c
] = measurement
->gain_idx
;
2490 factory_actual_pwr
[c
] = measurement
->actual_pow
;
2492 IWL_DEBUG_TXPOWER("chain = %d\n", c
);
2493 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2494 "curr tmp %d, comp %d steps\n",
2495 factory_temp
, current_temp
,
2496 temperature_comp
[c
]);
2498 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2499 factory_gain_index
[c
],
2500 factory_actual_pwr
[c
]);
2503 /* for each of 33 bit-rates (including 1 for CCK) */
2504 for (i
= 0; i
< POWER_TABLE_NUM_ENTRIES
; i
++) {
2506 union iwl4965_tx_power_dual_stream tx_power
;
2508 /* for mimo, reduce each chain's txpower by half
2509 * (3dB, 6 steps), so total output power is regulatory
2512 current_regulatory
= reg_limit
-
2513 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION
;
2516 current_regulatory
= reg_limit
;
2520 /* find txpower limit, either hardware or regulatory */
2521 power_limit
= saturation_power
- back_off_table
[i
];
2522 if (power_limit
> current_regulatory
)
2523 power_limit
= current_regulatory
;
2525 /* reduce user's txpower request if necessary
2526 * for this rate on this channel */
2527 target_power
= user_target_power
;
2528 if (target_power
> power_limit
)
2529 target_power
= power_limit
;
2531 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2532 i
, saturation_power
- back_off_table
[i
],
2533 current_regulatory
, user_target_power
,
2536 /* for each of 2 Tx chains (radio transmitters) */
2537 for (c
= 0; c
< 2; c
++) {
2542 (s32
)le32_to_cpu(priv
->card_alive_init
.
2543 tx_atten
[txatten_grp
][c
]);
2547 /* calculate index; higher index means lower txpower */
2548 power_index
= (u8
) (factory_gain_index
[c
] -
2550 factory_actual_pwr
[c
]) -
2551 temperature_comp
[c
] -
2552 voltage_compensation
+
2555 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2558 if (power_index
< get_min_power_index(i
, band
))
2559 power_index
= get_min_power_index(i
, band
);
2561 /* adjust 5 GHz index to support negative indexes */
2565 /* CCK, rate 32, reduce txpower for CCK */
2566 if (i
== POWER_TABLE_CCK_ENTRY
)
2568 IWL_TX_POWER_CCK_COMPENSATION_C_STEP
;
2570 /* stay within the table! */
2571 if (power_index
> 107) {
2572 IWL_WARNING("txpower index %d > 107\n",
2576 if (power_index
< 0) {
2577 IWL_WARNING("txpower index %d < 0\n",
2582 /* fill txpower command for this rate/chain */
2583 tx_power
.s
.radio_tx_gain
[c
] =
2584 gain_table
[band
][power_index
].radio
;
2585 tx_power
.s
.dsp_predis_atten
[c
] =
2586 gain_table
[band
][power_index
].dsp
;
2588 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2589 "gain 0x%02x dsp %d\n",
2590 c
, atten_value
, power_index
,
2591 tx_power
.s
.radio_tx_gain
[c
],
2592 tx_power
.s
.dsp_predis_atten
[c
]);
2593 }/* for each chain */
2595 tx_power_tbl
->power_tbl
[i
].dw
= cpu_to_le32(tx_power
.dw
);
2597 }/* for each rate */
2603 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2605 * Uses the active RXON for channel, band, and characteristics (fat, high)
2606 * The power limit is taken from priv->user_txpower_limit.
2608 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv
*priv
)
2610 struct iwl4965_txpowertable_cmd cmd
= { 0 };
2614 u8 ctrl_chan_high
= 0;
2616 if (test_bit(STATUS_SCANNING
, &priv
->status
)) {
2617 /* If this gets hit a lot, switch it to a BUG() and catch
2618 * the stack trace to find out who is calling this during
2620 IWL_WARNING("TX Power requested while scanning!\n");
2624 band
= priv
->band
== IEEE80211_BAND_2GHZ
;
2626 is_fat
= is_fat_channel(priv
->active_rxon
.flags
);
2629 (priv
->active_rxon
.flags
& RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
))
2633 cmd
.channel
= priv
->active_rxon
.channel
;
2635 rc
= iwl4965_fill_txpower_tbl(priv
, band
,
2636 le16_to_cpu(priv
->active_rxon
.channel
),
2637 is_fat
, ctrl_chan_high
, &cmd
.tx_power
);
2641 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_TX_PWR_TABLE_CMD
, sizeof(cmd
), &cmd
);
2645 int iwl4965_hw_channel_switch(struct iwl4965_priv
*priv
, u16 channel
)
2650 u8 ctrl_chan_high
= 0;
2651 struct iwl4965_channel_switch_cmd cmd
= { 0 };
2652 const struct iwl4965_channel_info
*ch_info
;
2654 band
= priv
->band
== IEEE80211_BAND_2GHZ
;
2656 ch_info
= iwl4965_get_channel_info(priv
, priv
->band
, channel
);
2658 is_fat
= is_fat_channel(priv
->staging_rxon
.flags
);
2661 (priv
->active_rxon
.flags
& RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
))
2665 cmd
.expect_beacon
= 0;
2666 cmd
.channel
= cpu_to_le16(channel
);
2667 cmd
.rxon_flags
= priv
->active_rxon
.flags
;
2668 cmd
.rxon_filter_flags
= priv
->active_rxon
.filter_flags
;
2669 cmd
.switch_time
= cpu_to_le32(priv
->ucode_beacon_time
);
2671 cmd
.expect_beacon
= is_channel_radar(ch_info
);
2673 cmd
.expect_beacon
= 1;
2675 rc
= iwl4965_fill_txpower_tbl(priv
, band
, channel
, is_fat
,
2676 ctrl_chan_high
, &cmd
.tx_power
);
2678 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc
);
2682 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_CHANNEL_SWITCH
, sizeof(cmd
), &cmd
);
2686 #define RTS_HCCA_RETRY_LIMIT 3
2687 #define RTS_DFAULT_RETRY_LIMIT 60
2689 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv
*priv
,
2690 struct iwl4965_cmd
*cmd
,
2691 struct ieee80211_tx_control
*ctrl
,
2692 struct ieee80211_hdr
*hdr
, int sta_id
,
2695 struct iwl4965_tx_cmd
*tx
= &cmd
->cmd
.tx
;
2696 u8 rts_retry_limit
= 0;
2697 u8 data_retry_limit
= 0;
2698 u16 fc
= le16_to_cpu(hdr
->frame_control
);
2701 int rate_idx
= min(ctrl
->tx_rate
->hw_value
& 0xffff, IWL_RATE_COUNT
- 1);
2703 rate_plcp
= iwl4965_rates
[rate_idx
].plcp
;
2705 rts_retry_limit
= (is_hcca
) ?
2706 RTS_HCCA_RETRY_LIMIT
: RTS_DFAULT_RETRY_LIMIT
;
2708 if ((rate_idx
>= IWL_FIRST_CCK_RATE
) && (rate_idx
<= IWL_LAST_CCK_RATE
))
2709 rate_flags
|= RATE_MCS_CCK_MSK
;
2712 if (ieee80211_is_probe_response(fc
)) {
2713 data_retry_limit
= 3;
2714 if (data_retry_limit
< rts_retry_limit
)
2715 rts_retry_limit
= data_retry_limit
;
2717 data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
2719 if (priv
->data_retry_limit
!= -1)
2720 data_retry_limit
= priv
->data_retry_limit
;
2723 if (ieee80211_is_data(fc
)) {
2724 tx
->initial_rate_index
= 0;
2725 tx
->tx_flags
|= TX_CMD_FLG_STA_RATE_MSK
;
2727 switch (fc
& IEEE80211_FCTL_STYPE
) {
2728 case IEEE80211_STYPE_AUTH
:
2729 case IEEE80211_STYPE_DEAUTH
:
2730 case IEEE80211_STYPE_ASSOC_REQ
:
2731 case IEEE80211_STYPE_REASSOC_REQ
:
2732 if (tx
->tx_flags
& TX_CMD_FLG_RTS_MSK
) {
2733 tx
->tx_flags
&= ~TX_CMD_FLG_RTS_MSK
;
2734 tx
->tx_flags
|= TX_CMD_FLG_CTS_MSK
;
2741 /* Alternate between antenna A and B for successive frames */
2742 if (priv
->use_ant_b_for_management_frame
) {
2743 priv
->use_ant_b_for_management_frame
= 0;
2744 rate_flags
|= RATE_MCS_ANT_B_MSK
;
2746 priv
->use_ant_b_for_management_frame
= 1;
2747 rate_flags
|= RATE_MCS_ANT_A_MSK
;
2751 tx
->rts_retry_limit
= rts_retry_limit
;
2752 tx
->data_retry_limit
= data_retry_limit
;
2753 tx
->rate_n_flags
= iwl4965_hw_set_rate_n_flags(rate_plcp
, rate_flags
);
2756 int iwl4965_hw_get_rx_read(struct iwl4965_priv
*priv
)
2758 struct iwl4965_shared
*shared_data
= priv
->hw_setting
.shared_virt
;
2760 return IWL_GET_BITS(*shared_data
, rb_closed_stts_rb_num
);
2763 int iwl4965_hw_get_temperature(struct iwl4965_priv
*priv
)
2765 return priv
->temperature
;
2768 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv
*priv
,
2769 struct iwl4965_frame
*frame
, u8 rate
)
2771 struct iwl4965_tx_beacon_cmd
*tx_beacon_cmd
;
2772 unsigned int frame_size
;
2774 tx_beacon_cmd
= &frame
->u
.beacon
;
2775 memset(tx_beacon_cmd
, 0, sizeof(*tx_beacon_cmd
));
2777 tx_beacon_cmd
->tx
.sta_id
= IWL4965_BROADCAST_ID
;
2778 tx_beacon_cmd
->tx
.stop_time
.life_time
= TX_CMD_LIFE_TIME_INFINITE
;
2780 frame_size
= iwl4965_fill_beacon_frame(priv
,
2781 tx_beacon_cmd
->frame
,
2782 iwl4965_broadcast_addr
,
2783 sizeof(frame
->u
) - sizeof(*tx_beacon_cmd
));
2785 BUG_ON(frame_size
> MAX_MPDU_SIZE
);
2786 tx_beacon_cmd
->tx
.len
= cpu_to_le16((u16
)frame_size
);
2788 if ((rate
== IWL_RATE_1M_PLCP
) || (rate
>= IWL_RATE_2M_PLCP
))
2789 tx_beacon_cmd
->tx
.rate_n_flags
=
2790 iwl4965_hw_set_rate_n_flags(rate
, RATE_MCS_CCK_MSK
);
2792 tx_beacon_cmd
->tx
.rate_n_flags
=
2793 iwl4965_hw_set_rate_n_flags(rate
, 0);
2795 tx_beacon_cmd
->tx
.tx_flags
= (TX_CMD_FLG_SEQ_CTL_MSK
|
2796 TX_CMD_FLG_TSF_MSK
| TX_CMD_FLG_STA_RATE_MSK
);
2797 return (sizeof(*tx_beacon_cmd
) + frame_size
);
2801 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2802 * given Tx queue, and enable the DMA channel used for that queue.
2804 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2805 * channels supported in hardware.
2807 int iwl4965_hw_tx_queue_init(struct iwl4965_priv
*priv
, struct iwl4965_tx_queue
*txq
)
2810 unsigned long flags
;
2811 int txq_id
= txq
->q
.id
;
2813 spin_lock_irqsave(&priv
->lock
, flags
);
2814 rc
= iwl4965_grab_nic_access(priv
);
2816 spin_unlock_irqrestore(&priv
->lock
, flags
);
2820 /* Circular buffer (TFD queue in DRAM) physical base address */
2821 iwl4965_write_direct32(priv
, FH_MEM_CBBC_QUEUE(txq_id
),
2822 txq
->q
.dma_addr
>> 8);
2824 /* Enable DMA channel, using same id as for TFD queue */
2825 iwl4965_write_direct32(
2826 priv
, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id
),
2827 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE
|
2828 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
);
2829 iwl4965_release_nic_access(priv
);
2830 spin_unlock_irqrestore(&priv
->lock
, flags
);
2835 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv
*priv
, void *ptr
,
2836 dma_addr_t addr
, u16 len
)
2839 struct iwl4965_tfd_frame
*tfd
= ptr
;
2840 u32 num_tbs
= IWL_GET_BITS(*tfd
, num_tbs
);
2842 /* Each TFD can point to a maximum 20 Tx buffers */
2843 if ((num_tbs
>= MAX_NUM_OF_TBS
) || (num_tbs
< 0)) {
2844 IWL_ERROR("Error can not send more than %d chunks\n",
2849 index
= num_tbs
/ 2;
2850 is_odd
= num_tbs
& 0x1;
2853 tfd
->pa
[index
].tb1_addr
= cpu_to_le32(addr
);
2854 IWL_SET_BITS(tfd
->pa
[index
], tb1_addr_hi
,
2855 iwl_get_dma_hi_address(addr
));
2856 IWL_SET_BITS(tfd
->pa
[index
], tb1_len
, len
);
2858 IWL_SET_BITS(tfd
->pa
[index
], tb2_addr_lo16
,
2859 (u32
) (addr
& 0xffff));
2860 IWL_SET_BITS(tfd
->pa
[index
], tb2_addr_hi20
, addr
>> 16);
2861 IWL_SET_BITS(tfd
->pa
[index
], tb2_len
, len
);
2864 IWL_SET_BITS(*tfd
, num_tbs
, num_tbs
+ 1);
2869 static void iwl4965_hw_card_show_info(struct iwl4965_priv
*priv
)
2871 u16 hw_version
= priv
->eeprom
.board_revision_4965
;
2873 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2874 ((hw_version
>> 8) & 0x0F),
2875 ((hw_version
>> 8) >> 4), (hw_version
& 0x00FF));
2877 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2878 priv
->eeprom
.board_pba_number_4965
);
2881 #define IWL_TX_CRC_SIZE 4
2882 #define IWL_TX_DELIMITER_SIZE 4
2885 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2887 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv
*priv
,
2888 struct iwl4965_tx_queue
*txq
, u16 byte_cnt
)
2891 int txq_id
= txq
->q
.id
;
2892 struct iwl4965_shared
*shared_data
= priv
->hw_setting
.shared_virt
;
2894 if (txq
->need_update
== 0)
2897 len
= byte_cnt
+ IWL_TX_CRC_SIZE
+ IWL_TX_DELIMITER_SIZE
;
2899 /* Set up byte count within first 256 entries */
2900 IWL_SET_BITS16(shared_data
->queues_byte_cnt_tbls
[txq_id
].
2901 tfd_offset
[txq
->q
.write_ptr
], byte_cnt
, len
);
2903 /* If within first 64 entries, duplicate at end */
2904 if (txq
->q
.write_ptr
< IWL4965_MAX_WIN_SIZE
)
2905 IWL_SET_BITS16(shared_data
->queues_byte_cnt_tbls
[txq_id
].
2906 tfd_offset
[IWL4965_QUEUE_SIZE
+ txq
->q
.write_ptr
],
2913 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2915 * Selects how many and which Rx receivers/antennas/chains to use.
2916 * This should not be used for scan command ... it puts data in wrong place.
2918 void iwl4965_set_rxon_chain(struct iwl4965_priv
*priv
)
2920 u8 is_single
= is_single_stream(priv
);
2921 u8 idle_state
, rx_state
;
2923 priv
->staging_rxon
.rx_chain
= 0;
2924 rx_state
= idle_state
= 3;
2926 /* Tell uCode which antennas are actually connected.
2927 * Before first association, we assume all antennas are connected.
2928 * Just after first association, iwl4965_noise_calibration()
2929 * checks which antennas actually *are* connected. */
2930 priv
->staging_rxon
.rx_chain
|=
2931 cpu_to_le16(priv
->valid_antenna
<< RXON_RX_CHAIN_VALID_POS
);
2933 /* How many receivers should we use? */
2934 iwl4965_get_rx_chain_counter(priv
, &idle_state
, &rx_state
);
2935 priv
->staging_rxon
.rx_chain
|=
2936 cpu_to_le16(rx_state
<< RXON_RX_CHAIN_MIMO_CNT_POS
);
2937 priv
->staging_rxon
.rx_chain
|=
2938 cpu_to_le16(idle_state
<< RXON_RX_CHAIN_CNT_POS
);
2940 if (!is_single
&& (rx_state
>= 2) &&
2941 !test_bit(STATUS_POWER_PMI
, &priv
->status
))
2942 priv
->staging_rxon
.rx_chain
|= RXON_RX_CHAIN_MIMO_FORCE_MSK
;
2944 priv
->staging_rxon
.rx_chain
&= ~RXON_RX_CHAIN_MIMO_FORCE_MSK
;
2946 IWL_DEBUG_ASSOC("rx chain %X\n", priv
->staging_rxon
.rx_chain
);
2950 * sign_extend - Sign extend a value using specified bit as sign-bit
2952 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2953 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2955 * @param oper value to sign extend
2956 * @param index 0 based bit index (0<=index<32) to sign bit
2958 static s32
sign_extend(u32 oper
, int index
)
2960 u8 shift
= 31 - index
;
2962 return (s32
)(oper
<< shift
) >> shift
;
2966 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2967 * @statistics: Provides the temperature reading from the uCode
2969 * A return of <0 indicates bogus data in the statistics
2971 int iwl4965_get_temperature(const struct iwl4965_priv
*priv
)
2978 if (test_bit(STATUS_TEMPERATURE
, &priv
->status
) &&
2979 (priv
->statistics
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
)) {
2980 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
2981 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[1]);
2982 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[1]);
2983 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[1]);
2984 R4
= le32_to_cpu(priv
->card_alive_init
.therm_r4
[1]);
2986 IWL_DEBUG_TEMP("Running temperature calibration\n");
2987 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[0]);
2988 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[0]);
2989 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[0]);
2990 R4
= le32_to_cpu(priv
->card_alive_init
.therm_r4
[0]);
2994 * Temperature is only 23 bits, so sign extend out to 32.
2996 * NOTE If we haven't received a statistics notification yet
2997 * with an updated temperature, use R4 provided to us in the
2998 * "initialize" ALIVE response.
3000 if (!test_bit(STATUS_TEMPERATURE
, &priv
->status
))
3001 vt
= sign_extend(R4
, 23);
3004 le32_to_cpu(priv
->statistics
.general
.temperature
), 23);
3006 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3010 IWL_ERROR("Calibration conflict R1 == R3\n");
3014 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3015 * Add offset to center the adjustment around 0 degrees Centigrade. */
3016 temperature
= TEMPERATURE_CALIB_A_VAL
* (vt
- R2
);
3017 temperature
/= (R3
- R1
);
3018 temperature
= (temperature
* 97) / 100 +
3019 TEMPERATURE_CALIB_KELVIN_OFFSET
;
3021 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature
,
3022 KELVIN_TO_CELSIUS(temperature
));
3027 /* Adjust Txpower only if temperature variance is greater than threshold. */
3028 #define IWL_TEMPERATURE_THRESHOLD 3
3031 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3033 * If the temperature changed has changed sufficiently, then a recalibration
3036 * Assumes caller will replace priv->last_temperature once calibration
3039 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv
*priv
)
3043 if (!test_bit(STATUS_STATISTICS
, &priv
->status
)) {
3044 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3048 temp_diff
= priv
->temperature
- priv
->last_temperature
;
3050 /* get absolute value */
3051 if (temp_diff
< 0) {
3052 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff
);
3053 temp_diff
= -temp_diff
;
3054 } else if (temp_diff
== 0)
3055 IWL_DEBUG_POWER("Same temp, \n");
3057 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff
);
3059 if (temp_diff
< IWL_TEMPERATURE_THRESHOLD
) {
3060 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3064 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3069 /* Calculate noise level, based on measurements during network silence just
3070 * before arriving beacon. This measurement can be done only if we know
3071 * exactly when to expect beacons, therefore only when we're associated. */
3072 static void iwl4965_rx_calc_noise(struct iwl4965_priv
*priv
)
3074 struct statistics_rx_non_phy
*rx_info
3075 = &(priv
->statistics
.rx
.general
);
3076 int num_active_rx
= 0;
3077 int total_silence
= 0;
3079 le32_to_cpu(rx_info
->beacon_silence_rssi_a
) & IN_BAND_FILTER
;
3081 le32_to_cpu(rx_info
->beacon_silence_rssi_b
) & IN_BAND_FILTER
;
3083 le32_to_cpu(rx_info
->beacon_silence_rssi_c
) & IN_BAND_FILTER
;
3085 if (bcn_silence_a
) {
3086 total_silence
+= bcn_silence_a
;
3089 if (bcn_silence_b
) {
3090 total_silence
+= bcn_silence_b
;
3093 if (bcn_silence_c
) {
3094 total_silence
+= bcn_silence_c
;
3098 /* Average among active antennas */
3100 priv
->last_rx_noise
= (total_silence
/ num_active_rx
) - 107;
3102 priv
->last_rx_noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3104 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3105 bcn_silence_a
, bcn_silence_b
, bcn_silence_c
,
3106 priv
->last_rx_noise
);
3109 void iwl4965_hw_rx_statistics(struct iwl4965_priv
*priv
, struct iwl4965_rx_mem_buffer
*rxb
)
3111 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3115 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3116 (int)sizeof(priv
->statistics
), pkt
->len
);
3118 change
= ((priv
->statistics
.general
.temperature
!=
3119 pkt
->u
.stats
.general
.temperature
) ||
3120 ((priv
->statistics
.flag
&
3121 STATISTICS_REPLY_FLG_FAT_MODE_MSK
) !=
3122 (pkt
->u
.stats
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
)));
3124 memcpy(&priv
->statistics
, &pkt
->u
.stats
, sizeof(priv
->statistics
));
3126 set_bit(STATUS_STATISTICS
, &priv
->status
);
3128 /* Reschedule the statistics timer to occur in
3129 * REG_RECALIB_PERIOD seconds to ensure we get a
3130 * thermal update even if the uCode doesn't give
3132 mod_timer(&priv
->statistics_periodic
, jiffies
+
3133 msecs_to_jiffies(REG_RECALIB_PERIOD
* 1000));
3135 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)) &&
3136 (pkt
->hdr
.cmd
== STATISTICS_NOTIFICATION
)) {
3137 iwl4965_rx_calc_noise(priv
);
3138 #ifdef CONFIG_IWL4965_SENSITIVITY
3139 queue_work(priv
->workqueue
, &priv
->sensitivity_work
);
3143 /* If the hardware hasn't reported a change in
3144 * temperature then don't bother computing a
3145 * calibrated temperature value */
3149 temp
= iwl4965_get_temperature(priv
);
3153 if (priv
->temperature
!= temp
) {
3154 if (priv
->temperature
)
3155 IWL_DEBUG_TEMP("Temperature changed "
3156 "from %dC to %dC\n",
3157 KELVIN_TO_CELSIUS(priv
->temperature
),
3158 KELVIN_TO_CELSIUS(temp
));
3160 IWL_DEBUG_TEMP("Temperature "
3161 "initialized to %dC\n",
3162 KELVIN_TO_CELSIUS(temp
));
3165 priv
->temperature
= temp
;
3166 set_bit(STATUS_TEMPERATURE
, &priv
->status
);
3168 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)) &&
3169 iwl4965_is_temp_calib_needed(priv
))
3170 queue_work(priv
->workqueue
, &priv
->txpower_work
);
3173 static void iwl4965_add_radiotap(struct iwl4965_priv
*priv
,
3174 struct sk_buff
*skb
,
3175 struct iwl4965_rx_phy_res
*rx_start
,
3176 struct ieee80211_rx_status
*stats
,
3179 s8 signal
= stats
->ssi
;
3181 int rate
= stats
->rate_idx
;
3182 u64 tsf
= stats
->mactime
;
3183 __le16 phy_flags_hw
= rx_start
->phy_flags
;
3184 struct iwl4965_rt_rx_hdr
{
3185 struct ieee80211_radiotap_header rt_hdr
;
3186 __le64 rt_tsf
; /* TSF */
3187 u8 rt_flags
; /* radiotap packet flags */
3188 u8 rt_rate
; /* rate in 500kb/s */
3189 __le16 rt_channelMHz
; /* channel in MHz */
3190 __le16 rt_chbitmask
; /* channel bitfield */
3191 s8 rt_dbmsignal
; /* signal in dBm, kluged to signed */
3193 u8 rt_antenna
; /* antenna number */
3194 } __attribute__ ((packed
)) *iwl4965_rt
;
3196 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3197 if (skb_headroom(skb
) < sizeof(*iwl4965_rt
)) {
3198 if (net_ratelimit())
3199 printk(KERN_ERR
"not enough headroom [%d] for "
3200 "radiotap head [%zd]\n",
3201 skb_headroom(skb
), sizeof(*iwl4965_rt
));
3205 /* put radiotap header in front of 802.11 header and data */
3206 iwl4965_rt
= (void *)skb_push(skb
, sizeof(*iwl4965_rt
));
3208 /* initialise radiotap header */
3209 iwl4965_rt
->rt_hdr
.it_version
= PKTHDR_RADIOTAP_VERSION
;
3210 iwl4965_rt
->rt_hdr
.it_pad
= 0;
3212 /* total header + data */
3213 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt
)),
3214 &iwl4965_rt
->rt_hdr
.it_len
);
3216 /* Indicate all the fields we add to the radiotap header */
3217 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT
) |
3218 (1 << IEEE80211_RADIOTAP_FLAGS
) |
3219 (1 << IEEE80211_RADIOTAP_RATE
) |
3220 (1 << IEEE80211_RADIOTAP_CHANNEL
) |
3221 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL
) |
3222 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE
) |
3223 (1 << IEEE80211_RADIOTAP_ANTENNA
)),
3224 &iwl4965_rt
->rt_hdr
.it_present
);
3226 /* Zero the flags, we'll add to them as we go */
3227 iwl4965_rt
->rt_flags
= 0;
3229 put_unaligned(cpu_to_le64(tsf
), &iwl4965_rt
->rt_tsf
);
3231 iwl4965_rt
->rt_dbmsignal
= signal
;
3232 iwl4965_rt
->rt_dbmnoise
= noise
;
3234 /* Convert the channel frequency and set the flags */
3235 put_unaligned(cpu_to_le16(stats
->freq
), &iwl4965_rt
->rt_channelMHz
);
3236 if (!(phy_flags_hw
& RX_RES_PHY_FLAGS_BAND_24_MSK
))
3237 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM
|
3238 IEEE80211_CHAN_5GHZ
),
3239 &iwl4965_rt
->rt_chbitmask
);
3240 else if (phy_flags_hw
& RX_RES_PHY_FLAGS_MOD_CCK_MSK
)
3241 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK
|
3242 IEEE80211_CHAN_2GHZ
),
3243 &iwl4965_rt
->rt_chbitmask
);
3245 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM
|
3246 IEEE80211_CHAN_2GHZ
),
3247 &iwl4965_rt
->rt_chbitmask
);
3250 iwl4965_rt
->rt_rate
= 0;
3252 iwl4965_rt
->rt_rate
= iwl4965_rates
[rate
].ieee
;
3257 * It seems that the antenna field in the phy flags value
3258 * is actually a bitfield. This is undefined by radiotap,
3259 * it wants an actual antenna number but I always get "7"
3260 * for most legacy frames I receive indicating that the
3261 * same frame was received on all three RX chains.
3263 * I think this field should be removed in favour of a
3264 * new 802.11n radiotap field "RX chains" that is defined
3267 iwl4965_rt
->rt_antenna
=
3268 le16_to_cpu(phy_flags_hw
& RX_RES_PHY_FLAGS_ANTENNA_MSK
) >> 4;
3270 /* set the preamble flag if appropriate */
3271 if (phy_flags_hw
& RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK
)
3272 iwl4965_rt
->rt_flags
|= IEEE80211_RADIOTAP_F_SHORTPRE
;
3274 stats
->flag
|= RX_FLAG_RADIOTAP
;
3277 static void iwl4965_handle_data_packet(struct iwl4965_priv
*priv
, int is_data
,
3279 struct iwl4965_rx_mem_buffer
*rxb
,
3280 struct ieee80211_rx_status
*stats
)
3282 struct iwl4965_rx_packet
*pkt
= (struct iwl4965_rx_packet
*)rxb
->skb
->data
;
3283 struct iwl4965_rx_phy_res
*rx_start
= (include_phy
) ?
3284 (struct iwl4965_rx_phy_res
*)&(pkt
->u
.raw
[0]) : NULL
;
3285 struct ieee80211_hdr
*hdr
;
3288 unsigned int skblen
;
3291 if (!include_phy
&& priv
->last_phy_res
[0])
3292 rx_start
= (struct iwl4965_rx_phy_res
*)&priv
->last_phy_res
[1];
3295 IWL_ERROR("MPDU frame without a PHY data\n");
3299 hdr
= (struct ieee80211_hdr
*)((u8
*) & rx_start
[1] +
3300 rx_start
->cfg_phy_cnt
);
3302 len
= le16_to_cpu(rx_start
->byte_count
);
3304 rx_end
= (__le32
*) ((u8
*) & pkt
->u
.raw
[0] +
3305 sizeof(struct iwl4965_rx_phy_res
) +
3306 rx_start
->cfg_phy_cnt
+ len
);
3309 struct iwl4965_rx_mpdu_res_start
*amsdu
=
3310 (struct iwl4965_rx_mpdu_res_start
*)pkt
->u
.raw
;
3312 hdr
= (struct ieee80211_hdr
*)(pkt
->u
.raw
+
3313 sizeof(struct iwl4965_rx_mpdu_res_start
));
3314 len
= le16_to_cpu(amsdu
->byte_count
);
3315 rx_start
->byte_count
= amsdu
->byte_count
;
3316 rx_end
= (__le32
*) (((u8
*) hdr
) + len
);
3318 if (len
> priv
->hw_setting
.max_pkt_size
|| len
< 16) {
3319 IWL_WARNING("byte count out of range [16,4K] : %d\n", len
);
3323 ampdu_status
= le32_to_cpu(*rx_end
);
3324 skblen
= ((u8
*) rx_end
- (u8
*) & pkt
->u
.raw
[0]) + sizeof(u32
);
3326 /* start from MAC */
3327 skb_reserve(rxb
->skb
, (void *)hdr
- (void *)pkt
);
3328 skb_put(rxb
->skb
, len
); /* end where data ends */
3330 /* We only process data packets if the interface is open */
3331 if (unlikely(!priv
->is_open
)) {
3332 IWL_DEBUG_DROP_LIMIT
3333 ("Dropping packet while interface is not open.\n");
3338 hdr
= (struct ieee80211_hdr
*)rxb
->skb
->data
;
3340 if (iwl4965_param_hwcrypto
)
3341 iwl4965_set_decrypted_flag(priv
, rxb
->skb
, ampdu_status
, stats
);
3343 if (priv
->add_radiotap
)
3344 iwl4965_add_radiotap(priv
, rxb
->skb
, rx_start
, stats
, ampdu_status
);
3346 ieee80211_rx_irqsafe(priv
->hw
, rxb
->skb
, stats
);
3347 priv
->alloc_rxb_skb
--;
3350 priv
->led_packets
+= len
;
3351 iwl4965_setup_activity_timer(priv
);
3355 /* Calc max signal level (dBm) among 3 possible receivers */
3356 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res
*rx_resp
)
3358 /* data from PHY/DSP regarding signal strength, etc.,
3359 * contents are always there, not configurable by host. */
3360 struct iwl4965_rx_non_cfg_phy
*ncphy
=
3361 (struct iwl4965_rx_non_cfg_phy
*)rx_resp
->non_cfg_phy
;
3362 u32 agc
= (le16_to_cpu(ncphy
->agc_info
) & IWL_AGC_DB_MASK
)
3365 u32 valid_antennae
=
3366 (le16_to_cpu(rx_resp
->phy_flags
) & RX_PHY_FLAGS_ANTENNAE_MASK
)
3367 >> RX_PHY_FLAGS_ANTENNAE_OFFSET
;
3371 /* Find max rssi among 3 possible receivers.
3372 * These values are measured by the digital signal processor (DSP).
3373 * They should stay fairly constant even as the signal strength varies,
3374 * if the radio's automatic gain control (AGC) is working right.
3375 * AGC value (see below) will provide the "interesting" info. */
3376 for (i
= 0; i
< 3; i
++)
3377 if (valid_antennae
& (1 << i
))
3378 max_rssi
= max(ncphy
->rssi_info
[i
<< 1], max_rssi
);
3380 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3381 ncphy
->rssi_info
[0], ncphy
->rssi_info
[2], ncphy
->rssi_info
[4],
3384 /* dBm = max_rssi dB - agc dB - constant.
3385 * Higher AGC (higher radio gain) means lower signal. */
3386 return (max_rssi
- agc
- IWL_RSSI_OFFSET
);
3389 #ifdef CONFIG_IWL4965_HT
3391 /* Parsed Information Elements */
3392 struct ieee802_11_elems
{
3402 u8 ht_cap_param_len
;
3404 u8 ht_extra_param_len
;
3407 static int parse_elems(u8
*start
, size_t len
, struct ieee802_11_elems
*elems
)
3413 memset(elems
, 0, sizeof(*elems
));
3426 case WLAN_EID_DS_PARAMS
:
3427 elems
->ds_params
= pos
;
3428 elems
->ds_params_len
= elen
;
3432 elems
->tim_len
= elen
;
3434 case WLAN_EID_IBSS_PARAMS
:
3435 elems
->ibss_params
= pos
;
3436 elems
->ibss_params_len
= elen
;
3438 case WLAN_EID_ERP_INFO
:
3439 elems
->erp_info
= pos
;
3440 elems
->erp_info_len
= elen
;
3442 case WLAN_EID_HT_CAPABILITY
:
3443 elems
->ht_cap_param
= pos
;
3444 elems
->ht_cap_param_len
= elen
;
3446 case WLAN_EID_HT_EXTRA_INFO
:
3447 elems
->ht_extra_param
= pos
;
3448 elems
->ht_extra_param_len
= elen
;
3462 void iwl4965_init_ht_hw_capab(struct ieee80211_ht_info
*ht_info
, int mode
)
3465 memset(ht_info
->supp_mcs_set
, 0, 16);
3467 ht_info
->ht_supported
= 1;
3469 if (mode
== MODE_IEEE80211A
) {
3470 ht_info
->cap
|= (u16
)IEEE80211_HT_CAP_SUP_WIDTH
;
3471 ht_info
->cap
|= (u16
)IEEE80211_HT_CAP_SGI_40
;
3472 ht_info
->supp_mcs_set
[4] = 0x01;
3474 ht_info
->cap
|= (u16
)IEEE80211_HT_CAP_GRN_FLD
;
3475 ht_info
->cap
|= (u16
)IEEE80211_HT_CAP_SGI_20
;
3476 ht_info
->cap
|= (u16
)(IEEE80211_HT_CAP_MIMO_PS
&
3477 (IWL_MIMO_PS_NONE
<< 2));
3478 if (iwl4965_param_amsdu_size_8K
) {
3479 printk(KERN_DEBUG
"iwl4965 in A-MSDU 8K support mode\n");
3480 ht_info
->cap
|= (u16
)IEEE80211_HT_CAP_MAX_AMSDU
;
3483 ht_info
->ampdu_factor
= CFG_HT_RX_AMPDU_FACTOR_DEF
;
3484 ht_info
->ampdu_density
= CFG_HT_MPDU_DENSITY_DEF
;
3486 ht_info
->supp_mcs_set
[0] = 0xFF;
3487 ht_info
->supp_mcs_set
[1] = 0xFF;
3489 #endif /* CONFIG_IWL4965_HT */
3491 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv
*priv
, int sta_id
)
3493 unsigned long flags
;
3495 spin_lock_irqsave(&priv
->sta_lock
, flags
);
3496 priv
->stations
[sta_id
].sta
.station_flags
&= ~STA_FLG_PWR_SAVE_MSK
;
3497 priv
->stations
[sta_id
].sta
.station_flags_msk
= STA_FLG_PWR_SAVE_MSK
;
3498 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= 0;
3499 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
3500 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
3502 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
3505 static void iwl4965_update_ps_mode(struct iwl4965_priv
*priv
, u16 ps_bit
, u8
*addr
)
3507 /* FIXME: need locking over ps_status ??? */
3508 u8 sta_id
= iwl4965_hw_find_station(priv
, addr
);
3510 if (sta_id
!= IWL_INVALID_STATION
) {
3511 u8 sta_awake
= priv
->stations
[sta_id
].
3512 ps_status
== STA_PS_STATUS_WAKE
;
3514 if (sta_awake
&& ps_bit
)
3515 priv
->stations
[sta_id
].ps_status
= STA_PS_STATUS_SLEEP
;
3516 else if (!sta_awake
&& !ps_bit
) {
3517 iwl4965_sta_modify_ps_wake(priv
, sta_id
);
3518 priv
->stations
[sta_id
].ps_status
= STA_PS_STATUS_WAKE
;
3523 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3525 /* Called for REPLY_4965_RX (legacy ABG frames), or
3526 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3527 static void iwl4965_rx_reply_rx(struct iwl4965_priv
*priv
,
3528 struct iwl4965_rx_mem_buffer
*rxb
)
3530 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3531 /* Use phy data (Rx signal strength, etc.) contained within
3532 * this rx packet for legacy frames,
3533 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3534 int include_phy
= (pkt
->hdr
.cmd
== REPLY_4965_RX
);
3535 struct iwl4965_rx_phy_res
*rx_start
= (include_phy
) ?
3536 (struct iwl4965_rx_phy_res
*)&(pkt
->u
.raw
[0]) :
3537 (struct iwl4965_rx_phy_res
*)&priv
->last_phy_res
[1];
3539 unsigned int len
= 0;
3540 struct ieee80211_hdr
*header
;
3542 struct ieee80211_rx_status stats
= {
3543 .mactime
= le64_to_cpu(rx_start
->timestamp
),
3544 .freq
= ieee80211chan2mhz(le16_to_cpu(rx_start
->channel
)),
3546 (rx_start
->phy_flags
& RX_RES_PHY_FLAGS_BAND_24_MSK
) ?
3547 IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
,
3549 .rate_idx
= iwl4965_rate_index_from_plcp(
3550 le32_to_cpu(rx_start
->rate_n_flags
)),
3555 if ((unlikely(rx_start
->cfg_phy_cnt
> 20))) {
3557 ("dsp size out of range [0,20]: "
3558 "%d/n", rx_start
->cfg_phy_cnt
);
3562 if (priv
->last_phy_res
[0])
3563 rx_start
= (struct iwl4965_rx_phy_res
*)
3564 &priv
->last_phy_res
[1];
3570 IWL_ERROR("MPDU frame without a PHY data\n");
3575 header
= (struct ieee80211_hdr
*)((u8
*) & rx_start
[1]
3576 + rx_start
->cfg_phy_cnt
);
3578 len
= le16_to_cpu(rx_start
->byte_count
);
3579 rx_end
= (__le32
*) (pkt
->u
.raw
+ rx_start
->cfg_phy_cnt
+
3580 sizeof(struct iwl4965_rx_phy_res
) + len
);
3582 struct iwl4965_rx_mpdu_res_start
*amsdu
=
3583 (struct iwl4965_rx_mpdu_res_start
*)pkt
->u
.raw
;
3585 header
= (void *)(pkt
->u
.raw
+
3586 sizeof(struct iwl4965_rx_mpdu_res_start
));
3587 len
= le16_to_cpu(amsdu
->byte_count
);
3588 rx_end
= (__le32
*) (pkt
->u
.raw
+
3589 sizeof(struct iwl4965_rx_mpdu_res_start
) + len
);
3592 if (!(*rx_end
& RX_RES_STATUS_NO_CRC32_ERROR
) ||
3593 !(*rx_end
& RX_RES_STATUS_NO_RXE_OVERFLOW
)) {
3594 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3595 le32_to_cpu(*rx_end
));
3599 priv
->ucode_beacon_time
= le32_to_cpu(rx_start
->beacon_time_stamp
);
3601 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3602 stats
.ssi
= iwl4965_calc_rssi(rx_start
);
3604 /* Meaningful noise values are available only from beacon statistics,
3605 * which are gathered only when associated, and indicate noise
3606 * only for the associated network channel ...
3607 * Ignore these noise values while scanning (other channels) */
3608 if (iwl4965_is_associated(priv
) &&
3609 !test_bit(STATUS_SCANNING
, &priv
->status
)) {
3610 stats
.noise
= priv
->last_rx_noise
;
3611 stats
.signal
= iwl4965_calc_sig_qual(stats
.ssi
, stats
.noise
);
3613 stats
.noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3614 stats
.signal
= iwl4965_calc_sig_qual(stats
.ssi
, 0);
3617 /* Reset beacon noise level if not associated. */
3618 if (!iwl4965_is_associated(priv
))
3619 priv
->last_rx_noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3621 #ifdef CONFIG_IWL4965_DEBUG
3622 /* TODO: Parts of iwl4965_report_frame are broken for 4965 */
3623 if (iwl4965_debug_level
& (IWL_DL_RX
))
3624 /* Set "1" to report good data frames in groups of 100 */
3625 iwl4965_report_frame(priv
, pkt
, header
, 1);
3627 if (iwl4965_debug_level
& (IWL_DL_RX
| IWL_DL_STATS
))
3628 IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3629 stats
.ssi
, stats
.noise
, stats
.signal
,
3630 (long unsigned int)le64_to_cpu(rx_start
->timestamp
));
3633 network_packet
= iwl4965_is_network_packet(priv
, header
);
3634 if (network_packet
) {
3635 priv
->last_rx_rssi
= stats
.ssi
;
3636 priv
->last_beacon_time
= priv
->ucode_beacon_time
;
3637 priv
->last_tsf
= le64_to_cpu(rx_start
->timestamp
);
3640 fc
= le16_to_cpu(header
->frame_control
);
3641 switch (fc
& IEEE80211_FCTL_FTYPE
) {
3642 case IEEE80211_FTYPE_MGMT
:
3644 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
)
3645 iwl4965_update_ps_mode(priv
, fc
& IEEE80211_FCTL_PM
,
3647 switch (fc
& IEEE80211_FCTL_STYPE
) {
3648 case IEEE80211_STYPE_PROBE_RESP
:
3649 case IEEE80211_STYPE_BEACON
:
3650 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_STA
&&
3651 !compare_ether_addr(header
->addr2
, priv
->bssid
)) ||
3652 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
&&
3653 !compare_ether_addr(header
->addr3
, priv
->bssid
))) {
3654 struct ieee80211_mgmt
*mgmt
=
3655 (struct ieee80211_mgmt
*)header
;
3657 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3659 priv
->timestamp0
= timestamp
& 0xFFFFFFFF;
3661 (timestamp
>> 32) & 0xFFFFFFFF;
3662 priv
->beacon_int
= le16_to_cpu(
3663 mgmt
->u
.beacon
.beacon_int
);
3664 if (priv
->call_post_assoc_from_beacon
&&
3665 (priv
->iw_mode
== IEEE80211_IF_TYPE_STA
)) {
3666 priv
->call_post_assoc_from_beacon
= 0;
3667 queue_work(priv
->workqueue
,
3668 &priv
->post_associate
.work
);
3673 case IEEE80211_STYPE_ACTION
:
3677 * TODO: Use the new callback function from
3678 * mac80211 instead of sniffing these packets.
3680 case IEEE80211_STYPE_ASSOC_RESP
:
3681 case IEEE80211_STYPE_REASSOC_RESP
:
3682 if (network_packet
) {
3683 #ifdef CONFIG_IWL4965_HT
3685 struct ieee802_11_elems elems
;
3686 #endif /*CONFIG_IWL4965_HT */
3687 struct ieee80211_mgmt
*mgnt
=
3688 (struct ieee80211_mgmt
*)header
;
3690 /* We have just associated, give some
3691 * time for the 4-way handshake if
3692 * any. Don't start scan too early. */
3693 priv
->next_scan_jiffies
= jiffies
+
3694 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC
;
3696 priv
->assoc_id
= (~((1 << 15) | (1 << 14))
3697 & le16_to_cpu(mgnt
->u
.assoc_resp
.aid
));
3698 priv
->assoc_capability
=
3700 mgnt
->u
.assoc_resp
.capab_info
);
3701 #ifdef CONFIG_IWL4965_HT
3702 pos
= mgnt
->u
.assoc_resp
.variable
;
3703 if (!parse_elems(pos
,
3704 len
- (pos
- (u8
*) mgnt
),
3706 if (elems
.ht_extra_param
&&
3710 #endif /*CONFIG_IWL4965_HT */
3711 /* assoc_id is 0 no association */
3712 if (!priv
->assoc_id
)
3714 if (priv
->beacon_int
)
3715 queue_work(priv
->workqueue
,
3716 &priv
->post_associate
.work
);
3718 priv
->call_post_assoc_from_beacon
= 1;
3723 case IEEE80211_STYPE_PROBE_REQ
:
3724 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) &&
3725 !iwl4965_is_associated(priv
)) {
3726 DECLARE_MAC_BUF(mac1
);
3727 DECLARE_MAC_BUF(mac2
);
3728 DECLARE_MAC_BUF(mac3
);
3730 IWL_DEBUG_DROP("Dropping (non network): "
3732 print_mac(mac1
, header
->addr1
),
3733 print_mac(mac2
, header
->addr2
),
3734 print_mac(mac3
, header
->addr3
));
3738 iwl4965_handle_data_packet(priv
, 0, include_phy
, rxb
, &stats
);
3741 case IEEE80211_FTYPE_CTL
:
3742 #ifdef CONFIG_IWL4965_HT
3743 switch (fc
& IEEE80211_FCTL_STYPE
) {
3744 case IEEE80211_STYPE_BACK_REQ
:
3745 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3746 iwl4965_handle_data_packet(priv
, 0, include_phy
,
3755 case IEEE80211_FTYPE_DATA
: {
3756 DECLARE_MAC_BUF(mac1
);
3757 DECLARE_MAC_BUF(mac2
);
3758 DECLARE_MAC_BUF(mac3
);
3760 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
)
3761 iwl4965_update_ps_mode(priv
, fc
& IEEE80211_FCTL_PM
,
3764 if (unlikely(!network_packet
))
3765 IWL_DEBUG_DROP("Dropping (non network): "
3767 print_mac(mac1
, header
->addr1
),
3768 print_mac(mac2
, header
->addr2
),
3769 print_mac(mac3
, header
->addr3
));
3770 else if (unlikely(iwl4965_is_duplicate_packet(priv
, header
)))
3771 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3772 print_mac(mac1
, header
->addr1
),
3773 print_mac(mac2
, header
->addr2
),
3774 print_mac(mac3
, header
->addr3
));
3776 iwl4965_handle_data_packet(priv
, 1, include_phy
, rxb
,
3786 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3787 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3788 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv
*priv
,
3789 struct iwl4965_rx_mem_buffer
*rxb
)
3791 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3792 priv
->last_phy_res
[0] = 1;
3793 memcpy(&priv
->last_phy_res
[1], &(pkt
->u
.raw
[0]),
3794 sizeof(struct iwl4965_rx_phy_res
));
3797 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv
*priv
,
3798 struct iwl4965_rx_mem_buffer
*rxb
)
3801 #ifdef CONFIG_IWL4965_SENSITIVITY
3802 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3803 struct iwl4965_missed_beacon_notif
*missed_beacon
;
3805 missed_beacon
= &pkt
->u
.missed_beacon
;
3806 if (le32_to_cpu(missed_beacon
->consequtive_missed_beacons
) > 5) {
3807 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3808 le32_to_cpu(missed_beacon
->consequtive_missed_beacons
),
3809 le32_to_cpu(missed_beacon
->total_missed_becons
),
3810 le32_to_cpu(missed_beacon
->num_recvd_beacons
),
3811 le32_to_cpu(missed_beacon
->num_expected_beacons
));
3812 priv
->sensitivity_data
.state
= IWL_SENS_CALIB_NEED_REINIT
;
3813 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)))
3814 queue_work(priv
->workqueue
, &priv
->sensitivity_work
);
3816 #endif /*CONFIG_IWL4965_SENSITIVITY*/
3819 #ifdef CONFIG_IWL4965_HT
3822 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
3824 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv
*priv
,
3825 int sta_id
, int tid
)
3827 unsigned long flags
;
3829 /* Remove "disable" flag, to enable Tx for this TID */
3830 spin_lock_irqsave(&priv
->sta_lock
, flags
);
3831 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_TID_DISABLE_TX
;
3832 priv
->stations
[sta_id
].sta
.tid_disable_tx
&= cpu_to_le16(~(1 << tid
));
3833 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
3834 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
3836 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
3840 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
3842 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
3843 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
3845 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv
*priv
,
3846 struct iwl4965_ht_agg
*agg
,
3847 struct iwl4965_compressed_ba_resp
*
3852 u16 seq_ctl
= le16_to_cpu(ba_resp
->seq_ctl
);
3853 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
3856 struct ieee80211_tx_status
*tx_status
;
3858 if (unlikely(!agg
->wait_for_ba
)) {
3859 IWL_ERROR("Received BA when not expected\n");
3863 /* Mark that the expected block-ack response arrived */
3864 agg
->wait_for_ba
= 0;
3865 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg
->start_idx
, ba_resp
->seq_ctl
);
3867 /* Calculate shift to align block-ack bits with our Tx window bits */
3868 sh
= agg
->start_idx
- SEQ_TO_INDEX(seq_ctl
>>4);
3869 if (sh
< 0) /* tbw something is wrong with indices */
3872 /* don't use 64-bit values for now */
3873 bitmap
= le64_to_cpu(ba_resp
->bitmap
) >> sh
;
3875 if (agg
->frame_count
> (64 - sh
)) {
3876 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
3880 /* check for success or failure according to the
3881 * transmitted bitmap and block-ack bitmap */
3882 bitmap
&= agg
->bitmap
;
3884 /* For each frame attempted in aggregation,
3885 * update driver's record of tx frame's status. */
3886 for (i
= 0; i
< agg
->frame_count
; i
++) {
3887 ack
= bitmap
& (1 << i
);
3889 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
3890 ack
? "ACK":"NACK", i
, (agg
->start_idx
+ i
) & 0xff,
3891 agg
->start_idx
+ i
);
3894 tx_status
= &priv
->txq
[scd_flow
].txb
[agg
->start_idx
].status
;
3895 tx_status
->flags
= IEEE80211_TX_STATUS_ACK
;
3896 tx_status
->flags
|= IEEE80211_TX_STATUS_AMPDU
;
3897 tx_status
->ampdu_ack_map
= successes
;
3898 tx_status
->ampdu_ack_len
= agg
->frame_count
;
3899 tx_status
->control
.tx_rate
= agg
->rate_n_flags
;
3901 IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap
);
3907 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
3909 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv
*priv
,
3912 /* Simply stop the queue, but don't change any configuration;
3913 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
3914 iwl4965_write_prph(priv
,
3915 KDR_SCD_QUEUE_STATUS_BITS(txq_id
),
3916 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE
)|
3917 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN
));
3921 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
3923 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv
*priv
, u16 txq_id
,
3924 u16 ssn_idx
, u8 tx_fifo
)
3926 if (IWL_BACK_QUEUE_FIRST_ID
> txq_id
) {
3927 IWL_WARNING("queue number too small: %d, must be > %d\n",
3928 txq_id
, IWL_BACK_QUEUE_FIRST_ID
);
3932 iwl4965_tx_queue_stop_scheduler(priv
, txq_id
);
3934 iwl4965_clear_bits_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, (1 << txq_id
));
3936 priv
->txq
[txq_id
].q
.read_ptr
= (ssn_idx
& 0xff);
3937 priv
->txq
[txq_id
].q
.write_ptr
= (ssn_idx
& 0xff);
3938 /* supposes that ssn_idx is valid (!= 0xFFF) */
3939 iwl4965_set_wr_ptrs(priv
, txq_id
, ssn_idx
);
3941 iwl4965_clear_bits_prph(priv
, KDR_SCD_INTERRUPT_MASK
, (1 << txq_id
));
3942 iwl4965_txq_ctx_deactivate(priv
, txq_id
);
3943 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[txq_id
], tx_fifo
, 0);
3948 int iwl4965_check_empty_hw_queue(struct iwl4965_priv
*priv
, int sta_id
,
3951 struct iwl4965_queue
*q
= &priv
->txq
[txq_id
].q
;
3952 u8
*addr
= priv
->stations
[sta_id
].sta
.sta
.addr
;
3953 struct iwl4965_tid_data
*tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
3955 switch (priv
->stations
[sta_id
].tid
[tid
].agg
.state
) {
3956 case IWL_EMPTYING_HW_QUEUE_DELBA
:
3957 /* We are reclaiming the last packet of the */
3958 /* aggregated HW queue */
3959 if (txq_id
== tid_data
->agg
.txq_id
&&
3960 q
->read_ptr
== q
->write_ptr
) {
3961 u16 ssn
= SEQ_TO_SN(tid_data
->seq_number
);
3962 int tx_fifo
= default_tid_to_tx_fifo
[tid
];
3963 IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
3964 iwl4965_tx_queue_agg_disable(priv
, txq_id
,
3966 tid_data
->agg
.state
= IWL_AGG_OFF
;
3967 ieee80211_stop_tx_ba_cb_irqsafe(priv
->hw
, addr
, tid
);
3970 case IWL_EMPTYING_HW_QUEUE_ADDBA
:
3971 /* We are reclaiming the last packet of the queue */
3972 if (tid_data
->tfds_in_queue
== 0) {
3973 IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
3974 tid_data
->agg
.state
= IWL_AGG_ON
;
3975 ieee80211_start_tx_ba_cb_irqsafe(priv
->hw
, addr
, tid
);
3983 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
3984 * @index -- current index
3985 * @n_bd -- total number of entries in queue (s/b power of 2)
3987 static inline int iwl4965_queue_dec_wrap(int index
, int n_bd
)
3989 return (index
== 0) ? n_bd
- 1 : index
- 1;
3993 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
3995 * Handles block-acknowledge notification from device, which reports success
3996 * of frames sent via aggregation.
3998 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv
*priv
,
3999 struct iwl4965_rx_mem_buffer
*rxb
)
4001 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
4002 struct iwl4965_compressed_ba_resp
*ba_resp
= &pkt
->u
.compressed_ba
;
4004 struct iwl4965_tx_queue
*txq
= NULL
;
4005 struct iwl4965_ht_agg
*agg
;
4006 DECLARE_MAC_BUF(mac
);
4008 /* "flow" corresponds to Tx queue */
4009 u16 scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
4011 /* "ssn" is start of block-ack Tx window, corresponds to index
4012 * (in Tx queue's circular buffer) of first TFD/frame in window */
4013 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_resp
->scd_ssn
);
4015 if (scd_flow
>= ARRAY_SIZE(priv
->txq
)) {
4016 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4020 txq
= &priv
->txq
[scd_flow
];
4021 agg
= &priv
->stations
[ba_resp
->sta_id
].tid
[ba_resp
->tid
].agg
;
4023 /* Find index just before block-ack window */
4024 index
= iwl4965_queue_dec_wrap(ba_resp_scd_ssn
& 0xff, txq
->q
.n_bd
);
4026 /* TODO: Need to get this copy more safely - now good for debug */
4028 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4031 print_mac(mac
, (u8
*) &ba_resp
->sta_addr_lo32
),
4033 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4034 "%d, scd_ssn = %d\n",
4040 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4044 /* Update driver's record of ACK vs. not for each frame in window */
4045 iwl4965_tx_status_reply_compressed_ba(priv
, agg
, ba_resp
);
4047 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4048 * block-ack window (we assume that they've been successfully
4049 * transmitted ... if not, it's too late anyway). */
4050 if (txq
->q
.read_ptr
!= (ba_resp_scd_ssn
& 0xff)) {
4051 int freed
= iwl4965_tx_queue_reclaim(priv
, scd_flow
, index
);
4052 priv
->stations
[ba_resp
->sta_id
].
4053 tid
[ba_resp
->tid
].tfds_in_queue
-= freed
;
4054 if (iwl4965_queue_space(&txq
->q
) > txq
->q
.low_mark
&&
4055 priv
->mac80211_registered
&&
4056 agg
->state
!= IWL_EMPTYING_HW_QUEUE_DELBA
)
4057 ieee80211_wake_queue(priv
->hw
, scd_flow
);
4058 iwl4965_check_empty_hw_queue(priv
, ba_resp
->sta_id
,
4059 ba_resp
->tid
, scd_flow
);
4064 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4066 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv
*priv
, u16 ra_tid
,
4073 scd_q2ratid
= ra_tid
& SCD_QUEUE_RA_TID_MAP_RATID_MSK
;
4075 tbl_dw_addr
= priv
->scd_base_addr
+
4076 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id
);
4078 tbl_dw
= iwl4965_read_targ_mem(priv
, tbl_dw_addr
);
4081 tbl_dw
= (scd_q2ratid
<< 16) | (tbl_dw
& 0x0000FFFF);
4083 tbl_dw
= scd_q2ratid
| (tbl_dw
& 0xFFFF0000);
4085 iwl4965_write_targ_mem(priv
, tbl_dw_addr
, tbl_dw
);
4092 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4094 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4095 * i.e. it must be one of the higher queues used for aggregation
4097 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv
*priv
, int txq_id
,
4098 int tx_fifo
, int sta_id
, int tid
,
4101 unsigned long flags
;
4105 if (IWL_BACK_QUEUE_FIRST_ID
> txq_id
)
4106 IWL_WARNING("queue number too small: %d, must be > %d\n",
4107 txq_id
, IWL_BACK_QUEUE_FIRST_ID
);
4109 ra_tid
= BUILD_RAxTID(sta_id
, tid
);
4111 /* Modify device's station table to Tx this TID */
4112 iwl4965_sta_modify_enable_tid_tx(priv
, sta_id
, tid
);
4114 spin_lock_irqsave(&priv
->lock
, flags
);
4115 rc
= iwl4965_grab_nic_access(priv
);
4117 spin_unlock_irqrestore(&priv
->lock
, flags
);
4121 /* Stop this Tx queue before configuring it */
4122 iwl4965_tx_queue_stop_scheduler(priv
, txq_id
);
4124 /* Map receiver-address / traffic-ID to this queue */
4125 iwl4965_tx_queue_set_q2ratid(priv
, ra_tid
, txq_id
);
4127 /* Set this queue as a chain-building queue */
4128 iwl4965_set_bits_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, (1 << txq_id
));
4130 /* Place first TFD at index corresponding to start sequence number.
4131 * Assumes that ssn_idx is valid (!= 0xFFF) */
4132 priv
->txq
[txq_id
].q
.read_ptr
= (ssn_idx
& 0xff);
4133 priv
->txq
[txq_id
].q
.write_ptr
= (ssn_idx
& 0xff);
4134 iwl4965_set_wr_ptrs(priv
, txq_id
, ssn_idx
);
4136 /* Set up Tx window size and frame limit for this queue */
4137 iwl4965_write_targ_mem(priv
,
4138 priv
->scd_base_addr
+ SCD_CONTEXT_QUEUE_OFFSET(txq_id
),
4139 (SCD_WIN_SIZE
<< SCD_QUEUE_CTX_REG1_WIN_SIZE_POS
) &
4140 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK
);
4142 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
4143 SCD_CONTEXT_QUEUE_OFFSET(txq_id
) + sizeof(u32
),
4144 (SCD_FRAME_LIMIT
<< SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS
)
4145 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK
);
4147 iwl4965_set_bits_prph(priv
, KDR_SCD_INTERRUPT_MASK
, (1 << txq_id
));
4149 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4150 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[txq_id
], tx_fifo
, 1);
4152 iwl4965_release_nic_access(priv
);
4153 spin_unlock_irqrestore(&priv
->lock
, flags
);
4158 #endif /* CONFIG_IWL4965_HT */
4161 * iwl4965_add_station - Initialize a station's hardware rate table
4163 * The uCode's station table contains a table of fallback rates
4164 * for automatic fallback during transmission.
4166 * NOTE: This sets up a default set of values. These will be replaced later
4167 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4170 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4171 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4172 * which requires station table entry to exist).
4174 void iwl4965_add_station(struct iwl4965_priv
*priv
, const u8
*addr
, int is_ap
)
4177 struct iwl4965_link_quality_cmd link_cmd
= {
4182 /* Set up the rate scaling to start at selected rate, fall back
4183 * all the way down to 1M in IEEE order, and then spin on 1M */
4185 r
= IWL_RATE_54M_INDEX
;
4186 else if (priv
->band
== IEEE80211_BAND_5GHZ
)
4187 r
= IWL_RATE_6M_INDEX
;
4189 r
= IWL_RATE_1M_INDEX
;
4191 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
4193 if (r
>= IWL_FIRST_CCK_RATE
&& r
<= IWL_LAST_CCK_RATE
)
4194 rate_flags
|= RATE_MCS_CCK_MSK
;
4196 /* Use Tx antenna B only */
4197 rate_flags
|= RATE_MCS_ANT_B_MSK
;
4198 rate_flags
&= ~RATE_MCS_ANT_A_MSK
;
4200 link_cmd
.rs_table
[i
].rate_n_flags
=
4201 iwl4965_hw_set_rate_n_flags(iwl4965_rates
[r
].plcp
, rate_flags
);
4202 r
= iwl4965_get_prev_ieee_rate(r
);
4205 link_cmd
.general_params
.single_stream_ant_msk
= 2;
4206 link_cmd
.general_params
.dual_stream_ant_msk
= 3;
4207 link_cmd
.agg_params
.agg_dis_start_th
= 3;
4208 link_cmd
.agg_params
.agg_time_limit
= cpu_to_le16(4000);
4210 /* Update the rate scaling for control frame Tx to AP */
4211 link_cmd
.sta_id
= is_ap
? IWL_AP_ID
: IWL4965_BROADCAST_ID
;
4213 iwl4965_send_cmd_pdu(priv
, REPLY_TX_LINK_QUALITY_CMD
, sizeof(link_cmd
),
4217 #ifdef CONFIG_IWL4965_HT
4219 static u8
iwl4965_is_channel_extension(struct iwl4965_priv
*priv
,
4220 enum ieee80211_band band
,
4221 u16 channel
, u8 extension_chan_offset
)
4223 const struct iwl4965_channel_info
*ch_info
;
4225 ch_info
= iwl4965_get_channel_info(priv
, band
, channel
);
4226 if (!is_channel_valid(ch_info
))
4229 if (extension_chan_offset
== IWL_EXT_CHANNEL_OFFSET_AUTO
)
4232 if ((ch_info
->fat_extension_channel
== extension_chan_offset
) ||
4233 (ch_info
->fat_extension_channel
== HT_IE_EXT_CHANNEL_MAX
))
4239 static u8
iwl4965_is_fat_tx_allowed(struct iwl4965_priv
*priv
,
4240 struct ieee80211_ht_info
*sta_ht_inf
)
4242 struct iwl_ht_info
*iwl_ht_conf
= &priv
->current_ht_config
;
4244 if ((!iwl_ht_conf
->is_ht
) ||
4245 (iwl_ht_conf
->supported_chan_width
!= IWL_CHANNEL_WIDTH_40MHZ
) ||
4246 (iwl_ht_conf
->extension_chan_offset
== IWL_EXT_CHANNEL_OFFSET_AUTO
))
4250 if ((!sta_ht_inf
->ht_supported
) ||
4251 (!(sta_ht_inf
->cap
& IEEE80211_HT_CAP_SUP_WIDTH
)))
4255 return (iwl4965_is_channel_extension(priv
, priv
->phymode
,
4256 iwl_ht_conf
->control_channel
,
4257 iwl_ht_conf
->extension_chan_offset
));
4260 void iwl4965_set_rxon_ht(struct iwl4965_priv
*priv
, struct iwl_ht_info
*ht_info
)
4262 struct iwl4965_rxon_cmd
*rxon
= &priv
->staging_rxon
;
4265 if (!ht_info
->is_ht
)
4268 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4269 if (iwl4965_is_fat_tx_allowed(priv
, NULL
))
4270 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4272 rxon
->flags
&= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK
|
4273 RXON_FLG_CHANNEL_MODE_PURE_40_MSK
);
4275 if (le16_to_cpu(rxon
->channel
) != ht_info
->control_channel
) {
4276 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4277 le16_to_cpu(rxon
->channel
),
4278 ht_info
->control_channel
);
4279 rxon
->channel
= cpu_to_le16(ht_info
->control_channel
);
4283 /* Note: control channel is opposite of extension channel */
4284 switch (ht_info
->extension_chan_offset
) {
4285 case IWL_EXT_CHANNEL_OFFSET_ABOVE
:
4286 rxon
->flags
&= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
);
4288 case IWL_EXT_CHANNEL_OFFSET_BELOW
:
4289 rxon
->flags
|= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
;
4291 case IWL_EXT_CHANNEL_OFFSET_AUTO
:
4292 rxon
->flags
&= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4295 rxon
->flags
&= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4299 val
= ht_info
->ht_protection
;
4301 rxon
->flags
|= cpu_to_le32(val
<< RXON_FLG_HT_OPERATING_MODE_POS
);
4303 iwl4965_set_rxon_chain(priv
);
4305 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4306 "rxon flags 0x%X operation mode :0x%X "
4307 "extension channel offset 0x%x "
4308 "control chan %d\n",
4309 ht_info
->supp_mcs_set
[0], ht_info
->supp_mcs_set
[1],
4310 le32_to_cpu(rxon
->flags
), ht_info
->ht_protection
,
4311 ht_info
->extension_chan_offset
,
4312 ht_info
->control_channel
);
4316 void iwl4965_set_ht_add_station(struct iwl4965_priv
*priv
, u8 index
,
4317 struct ieee80211_ht_info
*sta_ht_inf
)
4322 if (!sta_ht_inf
|| !sta_ht_inf
->ht_supported
)
4325 mimo_ps_mode
= (sta_ht_inf
->cap
& IEEE80211_HT_CAP_MIMO_PS
) >> 2;
4327 sta_flags
= priv
->stations
[index
].sta
.station_flags
;
4329 sta_flags
&= ~(STA_FLG_RTS_MIMO_PROT_MSK
| STA_FLG_MIMO_DIS_MSK
);
4331 switch (mimo_ps_mode
) {
4332 case WLAN_HT_CAP_MIMO_PS_STATIC
:
4333 sta_flags
|= STA_FLG_MIMO_DIS_MSK
;
4335 case WLAN_HT_CAP_MIMO_PS_DYNAMIC
:
4336 sta_flags
|= STA_FLG_RTS_MIMO_PROT_MSK
;
4338 case WLAN_HT_CAP_MIMO_PS_DISABLED
:
4341 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode
);
4345 sta_flags
|= cpu_to_le32(
4346 (u32
)sta_ht_inf
->ampdu_factor
<< STA_FLG_MAX_AGG_SIZE_POS
);
4348 sta_flags
|= cpu_to_le32(
4349 (u32
)sta_ht_inf
->ampdu_density
<< STA_FLG_AGG_MPDU_DENSITY_POS
);
4351 if (iwl4965_is_fat_tx_allowed(priv
, sta_ht_inf
))
4352 sta_flags
|= STA_FLG_FAT_EN_MSK
;
4354 sta_flags
&= ~STA_FLG_FAT_EN_MSK
;
4356 priv
->stations
[index
].sta
.station_flags
= sta_flags
;
4361 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv
*priv
,
4362 int sta_id
, int tid
, u16 ssn
)
4364 unsigned long flags
;
4366 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4367 priv
->stations
[sta_id
].sta
.station_flags_msk
= 0;
4368 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_ADDBA_TID_MSK
;
4369 priv
->stations
[sta_id
].sta
.add_immediate_ba_tid
= (u8
)tid
;
4370 priv
->stations
[sta_id
].sta
.add_immediate_ba_ssn
= cpu_to_le16(ssn
);
4371 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
4372 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4374 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
4377 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv
*priv
,
4378 int sta_id
, int tid
)
4380 unsigned long flags
;
4382 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4383 priv
->stations
[sta_id
].sta
.station_flags_msk
= 0;
4384 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_DELBA_TID_MSK
;
4385 priv
->stations
[sta_id
].sta
.remove_immediate_ba_tid
= (u8
)tid
;
4386 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
4387 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4389 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
4393 * Find first available (lowest unused) Tx Queue, mark it "active".
4394 * Called only when finding queue for aggregation.
4395 * Should never return anything < 7, because they should already
4396 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4398 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv
*priv
)
4402 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++)
4403 if (!test_and_set_bit(txq_id
, &priv
->txq_ctx_active_msk
))
4408 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw
*hw
, const u8
*da
,
4409 u16 tid
, u16
*start_seq_num
)
4411 struct iwl4965_priv
*priv
= hw
->priv
;
4417 unsigned long flags
;
4418 struct iwl4965_tid_data
*tid_data
;
4419 DECLARE_MAC_BUF(mac
);
4421 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
4422 tx_fifo
= default_tid_to_tx_fifo
[tid
];
4426 IWL_WARNING("%s on da = %s tid = %d\n",
4427 __func__
, print_mac(mac
, da
), tid
);
4429 sta_id
= iwl4965_hw_find_station(priv
, da
);
4430 if (sta_id
== IWL_INVALID_STATION
)
4433 if (priv
->stations
[sta_id
].tid
[tid
].agg
.state
!= IWL_AGG_OFF
) {
4434 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4438 txq_id
= iwl4965_txq_ctx_activate_free(priv
);
4442 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4443 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
4444 ssn
= SEQ_TO_SN(tid_data
->seq_number
);
4445 tid_data
->agg
.txq_id
= txq_id
;
4446 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4448 *start_seq_num
= ssn
;
4449 rc
= iwl4965_tx_queue_agg_enable(priv
, txq_id
, tx_fifo
,
4455 if (tid_data
->tfds_in_queue
== 0) {
4456 printk(KERN_ERR
"HW queue is empty\n");
4457 tid_data
->agg
.state
= IWL_AGG_ON
;
4458 ieee80211_start_tx_ba_cb_irqsafe(hw
, da
, tid
);
4460 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4461 tid_data
->tfds_in_queue
);
4462 tid_data
->agg
.state
= IWL_EMPTYING_HW_QUEUE_ADDBA
;
4467 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw
*hw
, const u8
*da
,
4471 struct iwl4965_priv
*priv
= hw
->priv
;
4472 int tx_fifo_id
, txq_id
, sta_id
, ssn
= -1;
4473 struct iwl4965_tid_data
*tid_data
;
4474 int rc
, write_ptr
, read_ptr
;
4475 unsigned long flags
;
4476 DECLARE_MAC_BUF(mac
);
4479 IWL_ERROR("da = NULL\n");
4483 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
4484 tx_fifo_id
= default_tid_to_tx_fifo
[tid
];
4488 sta_id
= iwl4965_hw_find_station(priv
, da
);
4490 if (sta_id
== IWL_INVALID_STATION
)
4493 if (priv
->stations
[sta_id
].tid
[tid
].agg
.state
!= IWL_AGG_ON
)
4494 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4496 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
4497 ssn
= (tid_data
->seq_number
& IEEE80211_SCTL_SEQ
) >> 4;
4498 txq_id
= tid_data
->agg
.txq_id
;
4499 write_ptr
= priv
->txq
[txq_id
].q
.write_ptr
;
4500 read_ptr
= priv
->txq
[txq_id
].q
.read_ptr
;
4502 /* The queue is not empty */
4503 if (write_ptr
!= read_ptr
) {
4504 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4505 priv
->stations
[sta_id
].tid
[tid
].agg
.state
=
4506 IWL_EMPTYING_HW_QUEUE_DELBA
;
4510 IWL_DEBUG_HT("HW queue empty\n");;
4511 priv
->stations
[sta_id
].tid
[tid
].agg
.state
= IWL_AGG_OFF
;
4513 spin_lock_irqsave(&priv
->lock
, flags
);
4514 rc
= iwl4965_grab_nic_access(priv
);
4516 spin_unlock_irqrestore(&priv
->lock
, flags
);
4519 rc
= iwl4965_tx_queue_agg_disable(priv
, txq_id
, ssn
, tx_fifo_id
);
4520 iwl4965_release_nic_access(priv
);
4521 spin_unlock_irqrestore(&priv
->lock
, flags
);
4526 ieee80211_stop_tx_ba_cb_irqsafe(priv
->hw
, da
, tid
);
4528 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4529 print_mac(mac
, da
), tid
);
4534 int iwl4965_mac_ampdu_action(struct ieee80211_hw
*hw
,
4535 enum ieee80211_ampdu_mlme_action action
,
4536 const u8
*addr
, u16 tid
, u16
*ssn
)
4538 struct iwl4965_priv
*priv
= hw
->priv
;
4540 DECLARE_MAC_BUF(mac
);
4542 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4543 print_mac(mac
, addr
), tid
);
4544 sta_id
= iwl4965_hw_find_station(priv
, addr
);
4546 case IEEE80211_AMPDU_RX_START
:
4547 IWL_DEBUG_HT("start Rx\n");
4548 iwl4965_sta_modify_add_ba_tid(priv
, sta_id
, tid
, *ssn
);
4550 case IEEE80211_AMPDU_RX_STOP
:
4551 IWL_DEBUG_HT("stop Rx\n");
4552 iwl4965_sta_modify_del_ba_tid(priv
, sta_id
, tid
);
4554 case IEEE80211_AMPDU_TX_START
:
4555 IWL_DEBUG_HT("start Tx\n");
4556 return iwl4965_mac_ht_tx_agg_start(hw
, addr
, tid
, ssn
);
4557 case IEEE80211_AMPDU_TX_STOP
:
4558 IWL_DEBUG_HT("stop Tx\n");
4559 return iwl4965_mac_ht_tx_agg_stop(hw
, addr
, tid
);
4561 IWL_DEBUG_HT("unknown\n");
4568 #endif /* CONFIG_IWL4965_HT */
4570 /* Set up 4965-specific Rx frame reply handlers */
4571 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv
*priv
)
4573 /* Legacy Rx frames */
4574 priv
->rx_handlers
[REPLY_4965_RX
] = iwl4965_rx_reply_rx
;
4576 /* High-throughput (HT) Rx frames */
4577 priv
->rx_handlers
[REPLY_RX_PHY_CMD
] = iwl4965_rx_reply_rx_phy
;
4578 priv
->rx_handlers
[REPLY_RX_MPDU_CMD
] = iwl4965_rx_reply_rx
;
4580 priv
->rx_handlers
[MISSED_BEACONS_NOTIFICATION
] =
4581 iwl4965_rx_missed_beacon_notif
;
4583 #ifdef CONFIG_IWL4965_HT
4584 priv
->rx_handlers
[REPLY_COMPRESSED_BA
] = iwl4965_rx_reply_compressed_ba
;
4585 #endif /* CONFIG_IWL4965_HT */
4588 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv
*priv
)
4590 INIT_WORK(&priv
->txpower_work
, iwl4965_bg_txpower_work
);
4591 INIT_WORK(&priv
->statistics_work
, iwl4965_bg_statistics_work
);
4592 #ifdef CONFIG_IWL4965_SENSITIVITY
4593 INIT_WORK(&priv
->sensitivity_work
, iwl4965_bg_sensitivity_work
);
4595 init_timer(&priv
->statistics_periodic
);
4596 priv
->statistics_periodic
.data
= (unsigned long)priv
;
4597 priv
->statistics_periodic
.function
= iwl4965_bg_statistics_periodic
;
4600 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv
*priv
)
4602 del_timer_sync(&priv
->statistics_periodic
);
4604 cancel_delayed_work(&priv
->init_alive_start
);
4607 struct pci_device_id iwl4965_hw_card_ids
[] = {
4608 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x4229)},
4609 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x4230)},
4614 * The device's EEPROM semaphore prevents conflicts between driver and uCode
4615 * when accessing the EEPROM; each access is a series of pulses to/from the
4616 * EEPROM chip, not a single event, so even reads could conflict if they
4617 * weren't arbitrated by the semaphore.
4619 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv
*priv
)
4624 for (count
= 0; count
< EEPROM_SEM_RETRY_LIMIT
; count
++) {
4625 /* Request semaphore */
4626 iwl4965_set_bit(priv
, CSR_HW_IF_CONFIG_REG
,
4627 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
4629 /* See if we got it */
4630 rc
= iwl4965_poll_bit(priv
, CSR_HW_IF_CONFIG_REG
,
4631 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
4632 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
4633 EEPROM_SEM_TIMEOUT
);
4635 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4644 MODULE_DEVICE_TABLE(pci
, iwl4965_hw_card_ids
);