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>
41 #include "iwl-helpers.h"
43 static void iwl4965_hw_card_show_info(struct iwl4965_priv
*priv
);
45 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
46 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
47 IWL_RATE_SISO_##s##M_PLCP, \
48 IWL_RATE_MIMO_##s##M_PLCP, \
49 IWL_RATE_##r##M_IEEE, \
50 IWL_RATE_##ip##M_INDEX, \
51 IWL_RATE_##in##M_INDEX, \
52 IWL_RATE_##rp##M_INDEX, \
53 IWL_RATE_##rn##M_INDEX, \
54 IWL_RATE_##pp##M_INDEX, \
55 IWL_RATE_##np##M_INDEX }
59 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
61 * If there isn't a valid next or previous rate then INV is used which
62 * maps to IWL_RATE_INVALID
65 const struct iwl4965_rate_info iwl4965_rates
[IWL_RATE_COUNT
] = {
66 IWL_DECLARE_RATE_INFO(1, INV
, INV
, 2, INV
, 2, INV
, 2), /* 1mbps */
67 IWL_DECLARE_RATE_INFO(2, INV
, 1, 5, 1, 5, 1, 5), /* 2mbps */
68 IWL_DECLARE_RATE_INFO(5, INV
, 2, 6, 2, 11, 2, 11), /*5.5mbps */
69 IWL_DECLARE_RATE_INFO(11, INV
, 9, 12, 9, 12, 5, 18), /* 11mbps */
70 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
71 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
72 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
73 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
74 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
75 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
76 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
77 IWL_DECLARE_RATE_INFO(54, 54, 48, INV
, 48, INV
, 48, INV
),/* 54mbps */
78 IWL_DECLARE_RATE_INFO(60, 60, 48, INV
, 48, INV
, 48, INV
),/* 60mbps */
81 static int is_fat_channel(__le32 rxon_flags
)
83 return (rxon_flags
& RXON_FLG_CHANNEL_MODE_PURE_40_MSK
) ||
84 (rxon_flags
& RXON_FLG_CHANNEL_MODE_MIXED_MSK
);
87 static u8
is_single_stream(struct iwl4965_priv
*priv
)
89 #ifdef CONFIG_IWL4965_HT
90 if (!priv
->is_ht_enabled
|| !priv
->current_assoc_ht
.is_ht
||
91 (priv
->active_rate_ht
[1] == 0) ||
92 (priv
->ps_mode
== IWL_MIMO_PS_STATIC
))
96 #endif /*CONFIG_IWL4965_HT */
101 * Determine how many receiver/antenna chains to use.
102 * More provides better reception via diversity. Fewer saves power.
103 * MIMO (dual stream) requires at least 2, but works better with 3.
104 * This does not determine *which* chains to use, just how many.
106 static int iwl4965_get_rx_chain_counter(struct iwl4965_priv
*priv
,
107 u8
*idle_state
, u8
*rx_state
)
109 u8 is_single
= is_single_stream(priv
);
110 u8 is_cam
= test_bit(STATUS_POWER_PMI
, &priv
->status
) ? 0 : 1;
112 /* # of Rx chains to use when expecting MIMO. */
113 if (is_single
|| (!is_cam
&& (priv
->ps_mode
== IWL_MIMO_PS_STATIC
)))
118 /* # Rx chains when idling and maybe trying to save power */
119 switch (priv
->ps_mode
) {
120 case IWL_MIMO_PS_STATIC
:
121 case IWL_MIMO_PS_DYNAMIC
:
122 *idle_state
= (is_cam
) ? 2 : 1;
124 case IWL_MIMO_PS_NONE
:
125 *idle_state
= (is_cam
) ? *rx_state
: 1;
135 int iwl4965_hw_rxq_stop(struct iwl4965_priv
*priv
)
140 spin_lock_irqsave(&priv
->lock
, flags
);
141 rc
= iwl4965_grab_nic_access(priv
);
143 spin_unlock_irqrestore(&priv
->lock
, flags
);
148 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
, 0);
149 rc
= iwl4965_poll_direct_bit(priv
, FH_MEM_RSSR_RX_STATUS_REG
,
152 IWL_ERROR("Can't stop Rx DMA.\n");
154 iwl4965_release_nic_access(priv
);
155 spin_unlock_irqrestore(&priv
->lock
, flags
);
160 u8
iwl4965_hw_find_station(struct iwl4965_priv
*priv
, const u8
*addr
)
164 int ret
= IWL_INVALID_STATION
;
166 DECLARE_MAC_BUF(mac
);
168 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) ||
169 (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
))
172 if (is_broadcast_ether_addr(addr
))
173 return IWL4965_BROADCAST_ID
;
175 spin_lock_irqsave(&priv
->sta_lock
, flags
);
176 for (i
= start
; i
< priv
->hw_setting
.max_stations
; i
++)
177 if ((priv
->stations
[i
].used
) &&
179 (priv
->stations
[i
].sta
.sta
.addr
, addr
))) {
184 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
185 print_mac(mac
, addr
), priv
->num_stations
);
188 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
192 static int iwl4965_nic_set_pwr_src(struct iwl4965_priv
*priv
, int pwr_max
)
197 spin_lock_irqsave(&priv
->lock
, flags
);
198 ret
= iwl4965_grab_nic_access(priv
);
200 spin_unlock_irqrestore(&priv
->lock
, flags
);
207 ret
= pci_read_config_dword(priv
->pci_dev
, PCI_POWER_SOURCE
,
210 if (val
& PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT
)
211 iwl4965_set_bits_mask_prph(priv
, APMG_PS_CTRL_REG
,
212 APMG_PS_CTRL_VAL_PWR_SRC_VAUX
,
213 ~APMG_PS_CTRL_MSK_PWR_SRC
);
215 iwl4965_set_bits_mask_prph(priv
, APMG_PS_CTRL_REG
,
216 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN
,
217 ~APMG_PS_CTRL_MSK_PWR_SRC
);
219 iwl4965_release_nic_access(priv
);
220 spin_unlock_irqrestore(&priv
->lock
, flags
);
225 static int iwl4965_rx_init(struct iwl4965_priv
*priv
, struct iwl4965_rx_queue
*rxq
)
230 spin_lock_irqsave(&priv
->lock
, flags
);
231 rc
= iwl4965_grab_nic_access(priv
);
233 spin_unlock_irqrestore(&priv
->lock
, flags
);
238 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
, 0);
240 /* Reset driver's Rx queue write index */
241 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_RBDCB_WPTR_REG
, 0);
243 /* Tell device where to find RBD circular buffer in DRAM */
244 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_RBDCB_BASE_REG
,
247 /* Tell device where in DRAM to update its Rx status */
248 iwl4965_write_direct32(priv
, FH_RSCSR_CHNL0_STTS_WPTR_REG
,
249 (priv
->hw_setting
.shared_phys
+
250 offsetof(struct iwl4965_shared
, val0
)) >> 4);
252 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
253 iwl4965_write_direct32(priv
, FH_MEM_RCSR_CHNL0_CONFIG_REG
,
254 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL
|
255 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL
|
256 IWL_FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K
|
258 (RX_QUEUE_SIZE_LOG
<<
259 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT
));
262 * iwl4965_write32(priv,CSR_INT_COAL_REG,0);
265 iwl4965_release_nic_access(priv
);
266 spin_unlock_irqrestore(&priv
->lock
, flags
);
271 /* Tell 4965 where to find the "keep warm" buffer */
272 static int iwl4965_kw_init(struct iwl4965_priv
*priv
)
277 spin_lock_irqsave(&priv
->lock
, flags
);
278 rc
= iwl4965_grab_nic_access(priv
);
282 iwl4965_write_direct32(priv
, IWL_FH_KW_MEM_ADDR_REG
,
283 priv
->kw
.dma_addr
>> 4);
284 iwl4965_release_nic_access(priv
);
286 spin_unlock_irqrestore(&priv
->lock
, flags
);
290 static int iwl4965_kw_alloc(struct iwl4965_priv
*priv
)
292 struct pci_dev
*dev
= priv
->pci_dev
;
293 struct iwl4965_kw
*kw
= &priv
->kw
;
295 kw
->size
= IWL4965_KW_SIZE
; /* TBW need set somewhere else */
296 kw
->v_addr
= pci_alloc_consistent(dev
, kw
->size
, &kw
->dma_addr
);
303 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
307 * iwl4965_set_fat_chan_info - Copy fat channel info into driver's priv.
309 * Does not set up a command, or touch hardware.
311 int iwl4965_set_fat_chan_info(struct iwl4965_priv
*priv
, int phymode
, u16 channel
,
312 const struct iwl4965_eeprom_channel
*eeprom_ch
,
313 u8 fat_extension_channel
)
315 struct iwl4965_channel_info
*ch_info
;
317 ch_info
= (struct iwl4965_channel_info
*)
318 iwl4965_get_channel_info(priv
, phymode
, channel
);
320 if (!is_channel_valid(ch_info
))
323 IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
324 " %ddBm): Ad-Hoc %ssupported\n",
326 is_channel_a_band(ch_info
) ?
328 CHECK_AND_PRINT(IBSS
),
329 CHECK_AND_PRINT(ACTIVE
),
330 CHECK_AND_PRINT(RADAR
),
331 CHECK_AND_PRINT(WIDE
),
332 CHECK_AND_PRINT(NARROW
),
333 CHECK_AND_PRINT(DFS
),
335 eeprom_ch
->max_power_avg
,
336 ((eeprom_ch
->flags
& EEPROM_CHANNEL_IBSS
)
337 && !(eeprom_ch
->flags
& EEPROM_CHANNEL_RADAR
)) ?
340 ch_info
->fat_eeprom
= *eeprom_ch
;
341 ch_info
->fat_max_power_avg
= eeprom_ch
->max_power_avg
;
342 ch_info
->fat_curr_txpow
= eeprom_ch
->max_power_avg
;
343 ch_info
->fat_min_power
= 0;
344 ch_info
->fat_scan_power
= eeprom_ch
->max_power_avg
;
345 ch_info
->fat_flags
= eeprom_ch
->flags
;
346 ch_info
->fat_extension_channel
= fat_extension_channel
;
352 * iwl4965_kw_free - Free the "keep warm" buffer
354 static void iwl4965_kw_free(struct iwl4965_priv
*priv
)
356 struct pci_dev
*dev
= priv
->pci_dev
;
357 struct iwl4965_kw
*kw
= &priv
->kw
;
360 pci_free_consistent(dev
, kw
->size
, kw
->v_addr
, kw
->dma_addr
);
361 memset(kw
, 0, sizeof(*kw
));
366 * iwl4965_txq_ctx_reset - Reset TX queue context
367 * Destroys all DMA structures and initialise them again
372 static int iwl4965_txq_ctx_reset(struct iwl4965_priv
*priv
)
375 int txq_id
, slots_num
;
378 iwl4965_kw_free(priv
);
380 /* Free all tx/cmd queues and keep-warm buffer */
381 iwl4965_hw_txq_ctx_free(priv
);
383 /* Alloc keep-warm buffer */
384 rc
= iwl4965_kw_alloc(priv
);
386 IWL_ERROR("Keep Warm allocation failed");
390 spin_lock_irqsave(&priv
->lock
, flags
);
392 rc
= iwl4965_grab_nic_access(priv
);
394 IWL_ERROR("TX reset failed");
395 spin_unlock_irqrestore(&priv
->lock
, flags
);
399 /* Turn off all Tx DMA channels */
400 iwl4965_write_prph(priv
, KDR_SCD_TXFACT
, 0);
401 iwl4965_release_nic_access(priv
);
402 spin_unlock_irqrestore(&priv
->lock
, flags
);
404 /* Tell 4965 where to find the keep-warm buffer */
405 rc
= iwl4965_kw_init(priv
);
407 IWL_ERROR("kw_init failed\n");
411 /* Alloc and init all (default 16) Tx queues,
412 * including the command queue (#4) */
413 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++) {
414 slots_num
= (txq_id
== IWL_CMD_QUEUE_NUM
) ?
415 TFD_CMD_SLOTS
: TFD_TX_CMD_SLOTS
;
416 rc
= iwl4965_tx_queue_init(priv
, &priv
->txq
[txq_id
], slots_num
,
419 IWL_ERROR("Tx %d queue init failed\n", txq_id
);
427 iwl4965_hw_txq_ctx_free(priv
);
429 iwl4965_kw_free(priv
);
434 int iwl4965_hw_nic_init(struct iwl4965_priv
*priv
)
438 struct iwl4965_rx_queue
*rxq
= &priv
->rxq
;
443 iwl4965_power_init_handle(priv
);
446 spin_lock_irqsave(&priv
->lock
, flags
);
448 iwl4965_set_bit(priv
, CSR_GIO_CHICKEN_BITS
,
449 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER
);
451 iwl4965_set_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
452 rc
= iwl4965_poll_bit(priv
, CSR_GP_CNTRL
,
453 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
,
454 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
, 25000);
456 spin_unlock_irqrestore(&priv
->lock
, flags
);
457 IWL_DEBUG_INFO("Failed to init the card\n");
461 rc
= iwl4965_grab_nic_access(priv
);
463 spin_unlock_irqrestore(&priv
->lock
, flags
);
467 iwl4965_read_prph(priv
, APMG_CLK_CTRL_REG
);
469 iwl4965_write_prph(priv
, APMG_CLK_CTRL_REG
,
470 APMG_CLK_VAL_DMA_CLK_RQT
|
471 APMG_CLK_VAL_BSM_CLK_RQT
);
472 iwl4965_read_prph(priv
, APMG_CLK_CTRL_REG
);
476 iwl4965_set_bits_prph(priv
, APMG_PCIDEV_STT_REG
,
477 APMG_PCIDEV_STT_VAL_L1_ACT_DIS
);
479 iwl4965_release_nic_access(priv
);
480 iwl4965_write32(priv
, CSR_INT_COALESCING
, 512 / 32);
481 spin_unlock_irqrestore(&priv
->lock
, flags
);
483 /* Determine HW type */
484 rc
= pci_read_config_byte(priv
->pci_dev
, PCI_REVISION_ID
, &rev_id
);
488 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id
);
490 iwl4965_nic_set_pwr_src(priv
, 1);
491 spin_lock_irqsave(&priv
->lock
, flags
);
493 if ((rev_id
& 0x80) == 0x80 && (rev_id
& 0x7f) < 8) {
494 pci_read_config_dword(priv
->pci_dev
, PCI_REG_WUM8
, &val
);
495 /* Enable No Snoop field */
496 pci_write_config_dword(priv
->pci_dev
, PCI_REG_WUM8
,
500 spin_unlock_irqrestore(&priv
->lock
, flags
);
502 /* Read the EEPROM */
503 rc
= iwl4965_eeprom_init(priv
);
507 if (priv
->eeprom
.calib_version
< EEPROM_TX_POWER_VERSION_NEW
) {
508 IWL_ERROR("Older EEPROM detected! Aborting.\n");
512 pci_read_config_byte(priv
->pci_dev
, PCI_LINK_CTRL
, &val_link
);
514 /* disable L1 entry -- workaround for pre-B1 */
515 pci_write_config_byte(priv
->pci_dev
, PCI_LINK_CTRL
, val_link
& ~0x02);
517 spin_lock_irqsave(&priv
->lock
, flags
);
519 /* set CSR_HW_CONFIG_REG for uCode use */
521 iwl4965_set_bit(priv
, CSR_SW_VER
, CSR_HW_IF_CONFIG_REG_BIT_KEDRON_R
|
522 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI
|
523 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI
);
525 rc
= iwl4965_grab_nic_access(priv
);
527 spin_unlock_irqrestore(&priv
->lock
, flags
);
528 IWL_DEBUG_INFO("Failed to init the card\n");
532 iwl4965_read_prph(priv
, APMG_PS_CTRL_REG
);
533 iwl4965_set_bits_prph(priv
, APMG_PS_CTRL_REG
,
534 APMG_PS_CTRL_VAL_RESET_REQ
);
536 iwl4965_clear_bits_prph(priv
, APMG_PS_CTRL_REG
,
537 APMG_PS_CTRL_VAL_RESET_REQ
);
539 iwl4965_release_nic_access(priv
);
540 spin_unlock_irqrestore(&priv
->lock
, flags
);
542 iwl4965_hw_card_show_info(priv
);
546 /* Allocate the RX queue, or reset if it is already allocated */
548 rc
= iwl4965_rx_queue_alloc(priv
);
550 IWL_ERROR("Unable to initialize Rx queue\n");
554 iwl4965_rx_queue_reset(priv
, rxq
);
556 iwl4965_rx_replenish(priv
);
558 iwl4965_rx_init(priv
, rxq
);
560 spin_lock_irqsave(&priv
->lock
, flags
);
562 rxq
->need_update
= 1;
563 iwl4965_rx_queue_update_write_ptr(priv
, rxq
);
565 spin_unlock_irqrestore(&priv
->lock
, flags
);
567 /* Allocate and init all Tx and Command queues */
568 rc
= iwl4965_txq_ctx_reset(priv
);
572 if (priv
->eeprom
.sku_cap
& EEPROM_SKU_CAP_SW_RF_KILL_ENABLE
)
573 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
575 if (priv
->eeprom
.sku_cap
& EEPROM_SKU_CAP_HW_RF_KILL_ENABLE
)
576 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
578 set_bit(STATUS_INIT
, &priv
->status
);
583 int iwl4965_hw_nic_stop_master(struct iwl4965_priv
*priv
)
589 spin_lock_irqsave(&priv
->lock
, flags
);
591 /* set stop master bit */
592 iwl4965_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_STOP_MASTER
);
594 reg_val
= iwl4965_read32(priv
, CSR_GP_CNTRL
);
596 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE
==
597 (reg_val
& CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE
))
598 IWL_DEBUG_INFO("Card in power save, master is already "
601 rc
= iwl4965_poll_bit(priv
, CSR_RESET
,
602 CSR_RESET_REG_FLAG_MASTER_DISABLED
,
603 CSR_RESET_REG_FLAG_MASTER_DISABLED
, 100);
605 spin_unlock_irqrestore(&priv
->lock
, flags
);
610 spin_unlock_irqrestore(&priv
->lock
, flags
);
611 IWL_DEBUG_INFO("stop master\n");
617 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
619 void iwl4965_hw_txq_ctx_stop(struct iwl4965_priv
*priv
)
625 /* Stop each Tx DMA channel, and wait for it to be idle */
626 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++) {
627 spin_lock_irqsave(&priv
->lock
, flags
);
628 if (iwl4965_grab_nic_access(priv
)) {
629 spin_unlock_irqrestore(&priv
->lock
, flags
);
633 iwl4965_write_direct32(priv
,
634 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id
),
636 iwl4965_poll_direct_bit(priv
, IWL_FH_TSSR_TX_STATUS_REG
,
637 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
639 iwl4965_release_nic_access(priv
);
640 spin_unlock_irqrestore(&priv
->lock
, flags
);
643 /* Deallocate memory for all Tx queues */
644 iwl4965_hw_txq_ctx_free(priv
);
647 int iwl4965_hw_nic_reset(struct iwl4965_priv
*priv
)
652 iwl4965_hw_nic_stop_master(priv
);
654 spin_lock_irqsave(&priv
->lock
, flags
);
656 iwl4965_set_bit(priv
, CSR_RESET
, CSR_RESET_REG_FLAG_SW_RESET
);
660 iwl4965_set_bit(priv
, CSR_GP_CNTRL
, CSR_GP_CNTRL_REG_FLAG_INIT_DONE
);
661 rc
= iwl4965_poll_bit(priv
, CSR_RESET
,
662 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
,
663 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY
, 25);
667 rc
= iwl4965_grab_nic_access(priv
);
669 iwl4965_write_prph(priv
, APMG_CLK_EN_REG
,
670 APMG_CLK_VAL_DMA_CLK_RQT
|
671 APMG_CLK_VAL_BSM_CLK_RQT
);
675 iwl4965_set_bits_prph(priv
, APMG_PCIDEV_STT_REG
,
676 APMG_PCIDEV_STT_VAL_L1_ACT_DIS
);
678 iwl4965_release_nic_access(priv
);
681 clear_bit(STATUS_HCMD_ACTIVE
, &priv
->status
);
682 wake_up_interruptible(&priv
->wait_command_queue
);
684 spin_unlock_irqrestore(&priv
->lock
, flags
);
690 #define REG_RECALIB_PERIOD (60)
693 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
695 * This callback is provided in order to queue the statistics_work
696 * in work_queue context (v. softirq)
698 * This timer function is continually reset to execute within
699 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
700 * was received. We need to ensure we receive the statistics in order
701 * to update the temperature used for calibrating the TXPOWER. However,
702 * we can't send the statistics command from softirq context (which
703 * is the context which timers run at) so we have to queue off the
704 * statistics_work to actually send the command to the hardware.
706 static void iwl4965_bg_statistics_periodic(unsigned long data
)
708 struct iwl4965_priv
*priv
= (struct iwl4965_priv
*)data
;
710 queue_work(priv
->workqueue
, &priv
->statistics_work
);
714 * iwl4965_bg_statistics_work - Send the statistics request to the hardware.
716 * This is queued by iwl4965_bg_statistics_periodic.
718 static void iwl4965_bg_statistics_work(struct work_struct
*work
)
720 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
723 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
))
726 mutex_lock(&priv
->mutex
);
727 iwl4965_send_statistics_request(priv
);
728 mutex_unlock(&priv
->mutex
);
731 #define CT_LIMIT_CONST 259
732 #define TM_CT_KILL_THRESHOLD 110
734 void iwl4965_rf_kill_ct_config(struct iwl4965_priv
*priv
)
736 struct iwl4965_ct_kill_config cmd
;
739 u32 crit_temperature
;
743 spin_lock_irqsave(&priv
->lock
, flags
);
744 iwl4965_write32(priv
, CSR_UCODE_DRV_GP1_CLR
,
745 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT
);
746 spin_unlock_irqrestore(&priv
->lock
, flags
);
748 if (priv
->statistics
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
) {
749 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[1]);
750 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[1]);
751 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[1]);
753 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[0]);
754 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[0]);
755 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[0]);
758 temp_th
= CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD
);
760 crit_temperature
= ((temp_th
* (R3
-R1
))/CT_LIMIT_CONST
) + R2
;
761 cmd
.critical_temperature_R
= cpu_to_le32(crit_temperature
);
762 rc
= iwl4965_send_cmd_pdu(priv
,
763 REPLY_CT_KILL_CONFIG_CMD
, sizeof(cmd
), &cmd
);
765 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
767 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
770 #ifdef CONFIG_IWL4965_SENSITIVITY
772 /* "false alarms" are signals that our DSP tries to lock onto,
773 * but then determines that they are either noise, or transmissions
774 * from a distant wireless network (also "noise", really) that get
775 * "stepped on" by stronger transmissions within our own network.
776 * This algorithm attempts to set a sensitivity level that is high
777 * enough to receive all of our own network traffic, but not so
778 * high that our DSP gets too busy trying to lock onto non-network
780 static int iwl4965_sens_energy_cck(struct iwl4965_priv
*priv
,
783 struct statistics_general_data
*rx_info
)
787 u8 max_silence_rssi
= 0;
789 u8 silence_rssi_a
= 0;
790 u8 silence_rssi_b
= 0;
791 u8 silence_rssi_c
= 0;
794 /* "false_alarms" values below are cross-multiplications to assess the
795 * numbers of false alarms within the measured period of actual Rx
796 * (Rx is off when we're txing), vs the min/max expected false alarms
797 * (some should be expected if rx is sensitive enough) in a
798 * hypothetical listening period of 200 time units (TU), 204.8 msec:
800 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
803 u32 false_alarms
= norm_fa
* 200 * 1024;
804 u32 max_false_alarms
= MAX_FA_CCK
* rx_enable_time
;
805 u32 min_false_alarms
= MIN_FA_CCK
* rx_enable_time
;
806 struct iwl4965_sensitivity_data
*data
= NULL
;
808 data
= &(priv
->sensitivity_data
);
810 data
->nrg_auto_corr_silence_diff
= 0;
812 /* Find max silence rssi among all 3 receivers.
813 * This is background noise, which may include transmissions from other
814 * networks, measured during silence before our network's beacon */
815 silence_rssi_a
= (u8
)((rx_info
->beacon_silence_rssi_a
&
816 ALL_BAND_FILTER
)>>8);
817 silence_rssi_b
= (u8
)((rx_info
->beacon_silence_rssi_b
&
818 ALL_BAND_FILTER
)>>8);
819 silence_rssi_c
= (u8
)((rx_info
->beacon_silence_rssi_c
&
820 ALL_BAND_FILTER
)>>8);
822 val
= max(silence_rssi_b
, silence_rssi_c
);
823 max_silence_rssi
= max(silence_rssi_a
, (u8
) val
);
825 /* Store silence rssi in 20-beacon history table */
826 data
->nrg_silence_rssi
[data
->nrg_silence_idx
] = max_silence_rssi
;
827 data
->nrg_silence_idx
++;
828 if (data
->nrg_silence_idx
>= NRG_NUM_PREV_STAT_L
)
829 data
->nrg_silence_idx
= 0;
831 /* Find max silence rssi across 20 beacon history */
832 for (i
= 0; i
< NRG_NUM_PREV_STAT_L
; i
++) {
833 val
= data
->nrg_silence_rssi
[i
];
834 silence_ref
= max(silence_ref
, val
);
836 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
837 silence_rssi_a
, silence_rssi_b
, silence_rssi_c
,
840 /* Find max rx energy (min value!) among all 3 receivers,
841 * measured during beacon frame.
842 * Save it in 10-beacon history table. */
843 i
= data
->nrg_energy_idx
;
844 val
= min(rx_info
->beacon_energy_b
, rx_info
->beacon_energy_c
);
845 data
->nrg_value
[i
] = min(rx_info
->beacon_energy_a
, val
);
847 data
->nrg_energy_idx
++;
848 if (data
->nrg_energy_idx
>= 10)
849 data
->nrg_energy_idx
= 0;
851 /* Find min rx energy (max value) across 10 beacon history.
852 * This is the minimum signal level that we want to receive well.
853 * Add backoff (margin so we don't miss slightly lower energy frames).
854 * This establishes an upper bound (min value) for energy threshold. */
855 max_nrg_cck
= data
->nrg_value
[0];
856 for (i
= 1; i
< 10; i
++)
857 max_nrg_cck
= (u32
) max(max_nrg_cck
, (data
->nrg_value
[i
]));
860 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
861 rx_info
->beacon_energy_a
, rx_info
->beacon_energy_b
,
862 rx_info
->beacon_energy_c
, max_nrg_cck
- 6);
864 /* Count number of consecutive beacons with fewer-than-desired
866 if (false_alarms
< min_false_alarms
)
867 data
->num_in_cck_no_fa
++;
869 data
->num_in_cck_no_fa
= 0;
870 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
871 data
->num_in_cck_no_fa
);
873 /* If we got too many false alarms this time, reduce sensitivity */
874 if (false_alarms
> max_false_alarms
) {
875 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
876 false_alarms
, max_false_alarms
);
877 IWL_DEBUG_CALIB("... reducing sensitivity\n");
878 data
->nrg_curr_state
= IWL_FA_TOO_MANY
;
880 if (data
->auto_corr_cck
> AUTO_CORR_MAX_TH_CCK
) {
881 /* Store for "fewer than desired" on later beacon */
882 data
->nrg_silence_ref
= silence_ref
;
884 /* increase energy threshold (reduce nrg value)
885 * to decrease sensitivity */
886 if (data
->nrg_th_cck
> (NRG_MAX_CCK
+ NRG_STEP_CCK
))
887 data
->nrg_th_cck
= data
->nrg_th_cck
891 /* increase auto_corr values to decrease sensitivity */
892 if (data
->auto_corr_cck
< AUTO_CORR_MAX_TH_CCK
)
893 data
->auto_corr_cck
= AUTO_CORR_MAX_TH_CCK
+ 1;
895 val
= data
->auto_corr_cck
+ AUTO_CORR_STEP_CCK
;
896 data
->auto_corr_cck
= min((u32
)AUTO_CORR_MAX_CCK
, val
);
898 val
= data
->auto_corr_cck_mrc
+ AUTO_CORR_STEP_CCK
;
899 data
->auto_corr_cck_mrc
= min((u32
)AUTO_CORR_MAX_CCK_MRC
, val
);
901 /* Else if we got fewer than desired, increase sensitivity */
902 } else if (false_alarms
< min_false_alarms
) {
903 data
->nrg_curr_state
= IWL_FA_TOO_FEW
;
905 /* Compare silence level with silence level for most recent
906 * healthy number or too many false alarms */
907 data
->nrg_auto_corr_silence_diff
= (s32
)data
->nrg_silence_ref
-
910 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
911 false_alarms
, min_false_alarms
,
912 data
->nrg_auto_corr_silence_diff
);
914 /* Increase value to increase sensitivity, but only if:
915 * 1a) previous beacon did *not* have *too many* false alarms
916 * 1b) AND there's a significant difference in Rx levels
917 * from a previous beacon with too many, or healthy # FAs
918 * OR 2) We've seen a lot of beacons (100) with too few
920 if ((data
->nrg_prev_state
!= IWL_FA_TOO_MANY
) &&
921 ((data
->nrg_auto_corr_silence_diff
> NRG_DIFF
) ||
922 (data
->num_in_cck_no_fa
> MAX_NUMBER_CCK_NO_FA
))) {
924 IWL_DEBUG_CALIB("... increasing sensitivity\n");
925 /* Increase nrg value to increase sensitivity */
926 val
= data
->nrg_th_cck
+ NRG_STEP_CCK
;
927 data
->nrg_th_cck
= min((u32
)NRG_MIN_CCK
, val
);
929 /* Decrease auto_corr values to increase sensitivity */
930 val
= data
->auto_corr_cck
- AUTO_CORR_STEP_CCK
;
931 data
->auto_corr_cck
= max((u32
)AUTO_CORR_MIN_CCK
, val
);
933 val
= data
->auto_corr_cck_mrc
- AUTO_CORR_STEP_CCK
;
934 data
->auto_corr_cck_mrc
=
935 max((u32
)AUTO_CORR_MIN_CCK_MRC
, val
);
938 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
940 /* Else we got a healthy number of false alarms, keep status quo */
942 IWL_DEBUG_CALIB(" FA in safe zone\n");
943 data
->nrg_curr_state
= IWL_FA_GOOD_RANGE
;
945 /* Store for use in "fewer than desired" with later beacon */
946 data
->nrg_silence_ref
= silence_ref
;
948 /* If previous beacon had too many false alarms,
949 * give it some extra margin by reducing sensitivity again
950 * (but don't go below measured energy of desired Rx) */
951 if (IWL_FA_TOO_MANY
== data
->nrg_prev_state
) {
952 IWL_DEBUG_CALIB("... increasing margin\n");
953 data
->nrg_th_cck
-= NRG_MARGIN
;
957 /* Make sure the energy threshold does not go above the measured
958 * energy of the desired Rx signals (reduced by backoff margin),
959 * or else we might start missing Rx frames.
960 * Lower value is higher energy, so we use max()!
962 data
->nrg_th_cck
= max(max_nrg_cck
, data
->nrg_th_cck
);
963 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data
->nrg_th_cck
);
965 data
->nrg_prev_state
= data
->nrg_curr_state
;
971 static int iwl4965_sens_auto_corr_ofdm(struct iwl4965_priv
*priv
,
976 u32 false_alarms
= norm_fa
* 200 * 1024;
977 u32 max_false_alarms
= MAX_FA_OFDM
* rx_enable_time
;
978 u32 min_false_alarms
= MIN_FA_OFDM
* rx_enable_time
;
979 struct iwl4965_sensitivity_data
*data
= NULL
;
981 data
= &(priv
->sensitivity_data
);
983 /* If we got too many false alarms this time, reduce sensitivity */
984 if (false_alarms
> max_false_alarms
) {
986 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
987 false_alarms
, max_false_alarms
);
989 val
= data
->auto_corr_ofdm
+ AUTO_CORR_STEP_OFDM
;
990 data
->auto_corr_ofdm
=
991 min((u32
)AUTO_CORR_MAX_OFDM
, val
);
993 val
= data
->auto_corr_ofdm_mrc
+ AUTO_CORR_STEP_OFDM
;
994 data
->auto_corr_ofdm_mrc
=
995 min((u32
)AUTO_CORR_MAX_OFDM_MRC
, val
);
997 val
= data
->auto_corr_ofdm_x1
+ AUTO_CORR_STEP_OFDM
;
998 data
->auto_corr_ofdm_x1
=
999 min((u32
)AUTO_CORR_MAX_OFDM_X1
, val
);
1001 val
= data
->auto_corr_ofdm_mrc_x1
+ AUTO_CORR_STEP_OFDM
;
1002 data
->auto_corr_ofdm_mrc_x1
=
1003 min((u32
)AUTO_CORR_MAX_OFDM_MRC_X1
, val
);
1006 /* Else if we got fewer than desired, increase sensitivity */
1007 else if (false_alarms
< min_false_alarms
) {
1009 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1010 false_alarms
, min_false_alarms
);
1012 val
= data
->auto_corr_ofdm
- AUTO_CORR_STEP_OFDM
;
1013 data
->auto_corr_ofdm
=
1014 max((u32
)AUTO_CORR_MIN_OFDM
, val
);
1016 val
= data
->auto_corr_ofdm_mrc
- AUTO_CORR_STEP_OFDM
;
1017 data
->auto_corr_ofdm_mrc
=
1018 max((u32
)AUTO_CORR_MIN_OFDM_MRC
, val
);
1020 val
= data
->auto_corr_ofdm_x1
- AUTO_CORR_STEP_OFDM
;
1021 data
->auto_corr_ofdm_x1
=
1022 max((u32
)AUTO_CORR_MIN_OFDM_X1
, val
);
1024 val
= data
->auto_corr_ofdm_mrc_x1
- AUTO_CORR_STEP_OFDM
;
1025 data
->auto_corr_ofdm_mrc_x1
=
1026 max((u32
)AUTO_CORR_MIN_OFDM_MRC_X1
, val
);
1030 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1031 min_false_alarms
, false_alarms
, max_false_alarms
);
1036 static int iwl4965_sensitivity_callback(struct iwl4965_priv
*priv
,
1037 struct iwl4965_cmd
*cmd
, struct sk_buff
*skb
)
1039 /* We didn't cache the SKB; let the caller free it */
1043 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1044 static int iwl4965_sensitivity_write(struct iwl4965_priv
*priv
, u8 flags
)
1047 struct iwl4965_sensitivity_cmd cmd
;
1048 struct iwl4965_sensitivity_data
*data
= NULL
;
1049 struct iwl4965_host_cmd cmd_out
= {
1050 .id
= SENSITIVITY_CMD
,
1051 .len
= sizeof(struct iwl4965_sensitivity_cmd
),
1052 .meta
.flags
= flags
,
1056 data
= &(priv
->sensitivity_data
);
1058 memset(&cmd
, 0, sizeof(cmd
));
1060 cmd
.table
[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX
] =
1061 cpu_to_le16((u16
)data
->auto_corr_ofdm
);
1062 cmd
.table
[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX
] =
1063 cpu_to_le16((u16
)data
->auto_corr_ofdm_mrc
);
1064 cmd
.table
[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX
] =
1065 cpu_to_le16((u16
)data
->auto_corr_ofdm_x1
);
1066 cmd
.table
[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX
] =
1067 cpu_to_le16((u16
)data
->auto_corr_ofdm_mrc_x1
);
1069 cmd
.table
[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX
] =
1070 cpu_to_le16((u16
)data
->auto_corr_cck
);
1071 cmd
.table
[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX
] =
1072 cpu_to_le16((u16
)data
->auto_corr_cck_mrc
);
1074 cmd
.table
[HD_MIN_ENERGY_CCK_DET_INDEX
] =
1075 cpu_to_le16((u16
)data
->nrg_th_cck
);
1076 cmd
.table
[HD_MIN_ENERGY_OFDM_DET_INDEX
] =
1077 cpu_to_le16((u16
)data
->nrg_th_ofdm
);
1079 cmd
.table
[HD_BARKER_CORR_TH_ADD_MIN_INDEX
] =
1080 __constant_cpu_to_le16(190);
1081 cmd
.table
[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX
] =
1082 __constant_cpu_to_le16(390);
1083 cmd
.table
[HD_OFDM_ENERGY_TH_IN_INDEX
] =
1084 __constant_cpu_to_le16(62);
1086 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1087 data
->auto_corr_ofdm
, data
->auto_corr_ofdm_mrc
,
1088 data
->auto_corr_ofdm_x1
, data
->auto_corr_ofdm_mrc_x1
,
1091 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1092 data
->auto_corr_cck
, data
->auto_corr_cck_mrc
,
1095 /* Update uCode's "work" table, and copy it to DSP */
1096 cmd
.control
= SENSITIVITY_CMD_CONTROL_WORK_TABLE
;
1098 if (flags
& CMD_ASYNC
)
1099 cmd_out
.meta
.u
.callback
= iwl4965_sensitivity_callback
;
1101 /* Don't send command to uCode if nothing has changed */
1102 if (!memcmp(&cmd
.table
[0], &(priv
->sensitivity_tbl
[0]),
1103 sizeof(u16
)*HD_TABLE_SIZE
)) {
1104 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1108 /* Copy table for comparison next time */
1109 memcpy(&(priv
->sensitivity_tbl
[0]), &(cmd
.table
[0]),
1110 sizeof(u16
)*HD_TABLE_SIZE
);
1112 rc
= iwl4965_send_cmd(priv
, &cmd_out
);
1114 IWL_DEBUG_CALIB("SENSITIVITY_CMD succeeded\n");
1121 void iwl4965_init_sensitivity(struct iwl4965_priv
*priv
, u8 flags
, u8 force
)
1125 struct iwl4965_sensitivity_data
*data
= NULL
;
1127 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1130 memset(&(priv
->sensitivity_tbl
[0]), 0,
1131 sizeof(u16
)*HD_TABLE_SIZE
);
1133 /* Clear driver's sensitivity algo data */
1134 data
= &(priv
->sensitivity_data
);
1135 memset(data
, 0, sizeof(struct iwl4965_sensitivity_data
));
1137 data
->num_in_cck_no_fa
= 0;
1138 data
->nrg_curr_state
= IWL_FA_TOO_MANY
;
1139 data
->nrg_prev_state
= IWL_FA_TOO_MANY
;
1140 data
->nrg_silence_ref
= 0;
1141 data
->nrg_silence_idx
= 0;
1142 data
->nrg_energy_idx
= 0;
1144 for (i
= 0; i
< 10; i
++)
1145 data
->nrg_value
[i
] = 0;
1147 for (i
= 0; i
< NRG_NUM_PREV_STAT_L
; i
++)
1148 data
->nrg_silence_rssi
[i
] = 0;
1150 data
->auto_corr_ofdm
= 90;
1151 data
->auto_corr_ofdm_mrc
= 170;
1152 data
->auto_corr_ofdm_x1
= 105;
1153 data
->auto_corr_ofdm_mrc_x1
= 220;
1154 data
->auto_corr_cck
= AUTO_CORR_CCK_MIN_VAL_DEF
;
1155 data
->auto_corr_cck_mrc
= 200;
1156 data
->nrg_th_cck
= 100;
1157 data
->nrg_th_ofdm
= 100;
1159 data
->last_bad_plcp_cnt_ofdm
= 0;
1160 data
->last_fa_cnt_ofdm
= 0;
1161 data
->last_bad_plcp_cnt_cck
= 0;
1162 data
->last_fa_cnt_cck
= 0;
1164 /* Clear prior Sensitivity command data to force send to uCode */
1166 memset(&(priv
->sensitivity_tbl
[0]), 0,
1167 sizeof(u16
)*HD_TABLE_SIZE
);
1169 rc
|= iwl4965_sensitivity_write(priv
, flags
);
1170 IWL_DEBUG_CALIB("<<return 0x%X\n", rc
);
1176 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1177 * Called after every association, but this runs only once!
1178 * ... once chain noise is calibrated the first time, it's good forever. */
1179 void iwl4965_chain_noise_reset(struct iwl4965_priv
*priv
)
1181 struct iwl4965_chain_noise_data
*data
= NULL
;
1184 data
= &(priv
->chain_noise_data
);
1185 if ((data
->state
== IWL_CHAIN_NOISE_ALIVE
) && iwl4965_is_associated(priv
)) {
1186 struct iwl4965_calibration_cmd cmd
;
1188 memset(&cmd
, 0, sizeof(cmd
));
1189 cmd
.opCode
= PHY_CALIBRATE_DIFF_GAIN_CMD
;
1190 cmd
.diff_gain_a
= 0;
1191 cmd
.diff_gain_b
= 0;
1192 cmd
.diff_gain_c
= 0;
1193 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_PHY_CALIBRATION_CMD
,
1196 data
->state
= IWL_CHAIN_NOISE_ACCUMULATE
;
1197 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1203 * Accumulate 20 beacons of signal and noise statistics for each of
1204 * 3 receivers/antennas/rx-chains, then figure out:
1205 * 1) Which antennas are connected.
1206 * 2) Differential rx gain settings to balance the 3 receivers.
1208 static void iwl4965_noise_calibration(struct iwl4965_priv
*priv
,
1209 struct iwl4965_notif_statistics
*stat_resp
)
1211 struct iwl4965_chain_noise_data
*data
= NULL
;
1220 u32 average_sig
[NUM_RX_CHAINS
] = {INITIALIZATION_VALUE
};
1221 u32 average_noise
[NUM_RX_CHAINS
] = {INITIALIZATION_VALUE
};
1222 u32 max_average_sig
;
1223 u16 max_average_sig_antenna_i
;
1224 u32 min_average_noise
= MIN_AVERAGE_NOISE_MAX_VALUE
;
1225 u16 min_average_noise_antenna_i
= INITIALIZATION_VALUE
;
1227 u16 chan_num
= INITIALIZATION_VALUE
;
1228 u32 band
= INITIALIZATION_VALUE
;
1229 u32 active_chains
= 0;
1230 unsigned long flags
;
1231 struct statistics_rx_non_phy
*rx_info
= &(stat_resp
->rx
.general
);
1233 data
= &(priv
->chain_noise_data
);
1235 /* Accumulate just the first 20 beacons after the first association,
1236 * then we're done forever. */
1237 if (data
->state
!= IWL_CHAIN_NOISE_ACCUMULATE
) {
1238 if (data
->state
== IWL_CHAIN_NOISE_ALIVE
)
1239 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1243 spin_lock_irqsave(&priv
->lock
, flags
);
1244 if (rx_info
->interference_data_flag
!= INTERFERENCE_DATA_AVAILABLE
) {
1245 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1246 spin_unlock_irqrestore(&priv
->lock
, flags
);
1250 band
= (priv
->staging_rxon
.flags
& RXON_FLG_BAND_24G_MSK
) ? 0 : 1;
1251 chan_num
= le16_to_cpu(priv
->staging_rxon
.channel
);
1253 /* Make sure we accumulate data for just the associated channel
1254 * (even if scanning). */
1255 if ((chan_num
!= (le32_to_cpu(stat_resp
->flag
) >> 16)) ||
1256 ((STATISTICS_REPLY_FLG_BAND_24G_MSK
==
1257 (stat_resp
->flag
& STATISTICS_REPLY_FLG_BAND_24G_MSK
)) && band
)) {
1258 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1260 spin_unlock_irqrestore(&priv
->lock
, flags
);
1264 /* Accumulate beacon statistics values across 20 beacons */
1265 chain_noise_a
= le32_to_cpu(rx_info
->beacon_silence_rssi_a
) &
1267 chain_noise_b
= le32_to_cpu(rx_info
->beacon_silence_rssi_b
) &
1269 chain_noise_c
= le32_to_cpu(rx_info
->beacon_silence_rssi_c
) &
1272 chain_sig_a
= le32_to_cpu(rx_info
->beacon_rssi_a
) & IN_BAND_FILTER
;
1273 chain_sig_b
= le32_to_cpu(rx_info
->beacon_rssi_b
) & IN_BAND_FILTER
;
1274 chain_sig_c
= le32_to_cpu(rx_info
->beacon_rssi_c
) & IN_BAND_FILTER
;
1276 spin_unlock_irqrestore(&priv
->lock
, flags
);
1278 data
->beacon_count
++;
1280 data
->chain_noise_a
= (chain_noise_a
+ data
->chain_noise_a
);
1281 data
->chain_noise_b
= (chain_noise_b
+ data
->chain_noise_b
);
1282 data
->chain_noise_c
= (chain_noise_c
+ data
->chain_noise_c
);
1284 data
->chain_signal_a
= (chain_sig_a
+ data
->chain_signal_a
);
1285 data
->chain_signal_b
= (chain_sig_b
+ data
->chain_signal_b
);
1286 data
->chain_signal_c
= (chain_sig_c
+ data
->chain_signal_c
);
1288 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num
, band
,
1289 data
->beacon_count
);
1290 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1291 chain_sig_a
, chain_sig_b
, chain_sig_c
);
1292 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1293 chain_noise_a
, chain_noise_b
, chain_noise_c
);
1295 /* If this is the 20th beacon, determine:
1296 * 1) Disconnected antennas (using signal strengths)
1297 * 2) Differential gain (using silence noise) to balance receivers */
1298 if (data
->beacon_count
== CAL_NUM_OF_BEACONS
) {
1300 /* Analyze signal for disconnected antenna */
1301 average_sig
[0] = (data
->chain_signal_a
) / CAL_NUM_OF_BEACONS
;
1302 average_sig
[1] = (data
->chain_signal_b
) / CAL_NUM_OF_BEACONS
;
1303 average_sig
[2] = (data
->chain_signal_c
) / CAL_NUM_OF_BEACONS
;
1305 if (average_sig
[0] >= average_sig
[1]) {
1306 max_average_sig
= average_sig
[0];
1307 max_average_sig_antenna_i
= 0;
1308 active_chains
= (1 << max_average_sig_antenna_i
);
1310 max_average_sig
= average_sig
[1];
1311 max_average_sig_antenna_i
= 1;
1312 active_chains
= (1 << max_average_sig_antenna_i
);
1315 if (average_sig
[2] >= max_average_sig
) {
1316 max_average_sig
= average_sig
[2];
1317 max_average_sig_antenna_i
= 2;
1318 active_chains
= (1 << max_average_sig_antenna_i
);
1321 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1322 average_sig
[0], average_sig
[1], average_sig
[2]);
1323 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1324 max_average_sig
, max_average_sig_antenna_i
);
1326 /* Compare signal strengths for all 3 receivers. */
1327 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1328 if (i
!= max_average_sig_antenna_i
) {
1329 s32 rssi_delta
= (max_average_sig
-
1332 /* If signal is very weak, compared with
1333 * strongest, mark it as disconnected. */
1334 if (rssi_delta
> MAXIMUM_ALLOWED_PATHLOSS
)
1335 data
->disconn_array
[i
] = 1;
1337 active_chains
|= (1 << i
);
1338 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1339 "disconn_array[i] = %d\n",
1340 i
, rssi_delta
, data
->disconn_array
[i
]);
1344 /*If both chains A & B are disconnected -
1345 * connect B and leave A as is */
1346 if (data
->disconn_array
[CHAIN_A
] &&
1347 data
->disconn_array
[CHAIN_B
]) {
1348 data
->disconn_array
[CHAIN_B
] = 0;
1349 active_chains
|= (1 << CHAIN_B
);
1350 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1351 "W/A - declare B as connected\n");
1354 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1357 /* Save for use within RXON, TX, SCAN commands, etc. */
1358 priv
->valid_antenna
= active_chains
;
1360 /* Analyze noise for rx balance */
1361 average_noise
[0] = ((data
->chain_noise_a
)/CAL_NUM_OF_BEACONS
);
1362 average_noise
[1] = ((data
->chain_noise_b
)/CAL_NUM_OF_BEACONS
);
1363 average_noise
[2] = ((data
->chain_noise_c
)/CAL_NUM_OF_BEACONS
);
1365 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1366 if (!(data
->disconn_array
[i
]) &&
1367 (average_noise
[i
] <= min_average_noise
)) {
1368 /* This means that chain i is active and has
1369 * lower noise values so far: */
1370 min_average_noise
= average_noise
[i
];
1371 min_average_noise_antenna_i
= i
;
1375 data
->delta_gain_code
[min_average_noise_antenna_i
] = 0;
1377 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1378 average_noise
[0], average_noise
[1],
1381 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1382 min_average_noise
, min_average_noise_antenna_i
);
1384 for (i
= 0; i
< NUM_RX_CHAINS
; i
++) {
1387 if (!(data
->disconn_array
[i
]) &&
1388 (data
->delta_gain_code
[i
] ==
1389 CHAIN_NOISE_DELTA_GAIN_INIT_VAL
)) {
1390 delta_g
= average_noise
[i
] - min_average_noise
;
1391 data
->delta_gain_code
[i
] = (u8
)((delta_g
*
1393 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE
<
1394 data
->delta_gain_code
[i
])
1395 data
->delta_gain_code
[i
] =
1396 CHAIN_NOISE_MAX_DELTA_GAIN_CODE
;
1398 data
->delta_gain_code
[i
] =
1399 (data
->delta_gain_code
[i
] | (1 << 2));
1401 data
->delta_gain_code
[i
] = 0;
1403 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1404 data
->delta_gain_code
[0],
1405 data
->delta_gain_code
[1],
1406 data
->delta_gain_code
[2]);
1408 /* Differential gain gets sent to uCode only once */
1409 if (!data
->radio_write
) {
1410 struct iwl4965_calibration_cmd cmd
;
1411 data
->radio_write
= 1;
1413 memset(&cmd
, 0, sizeof(cmd
));
1414 cmd
.opCode
= PHY_CALIBRATE_DIFF_GAIN_CMD
;
1415 cmd
.diff_gain_a
= data
->delta_gain_code
[0];
1416 cmd
.diff_gain_b
= data
->delta_gain_code
[1];
1417 cmd
.diff_gain_c
= data
->delta_gain_code
[2];
1418 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_PHY_CALIBRATION_CMD
,
1421 IWL_DEBUG_CALIB("fail sending cmd "
1422 "REPLY_PHY_CALIBRATION_CMD \n");
1424 /* TODO we might want recalculate
1425 * rx_chain in rxon cmd */
1427 /* Mark so we run this algo only once! */
1428 data
->state
= IWL_CHAIN_NOISE_CALIBRATED
;
1430 data
->chain_noise_a
= 0;
1431 data
->chain_noise_b
= 0;
1432 data
->chain_noise_c
= 0;
1433 data
->chain_signal_a
= 0;
1434 data
->chain_signal_b
= 0;
1435 data
->chain_signal_c
= 0;
1436 data
->beacon_count
= 0;
1441 static void iwl4965_sensitivity_calibration(struct iwl4965_priv
*priv
,
1442 struct iwl4965_notif_statistics
*resp
)
1452 struct iwl4965_sensitivity_data
*data
= NULL
;
1453 struct statistics_rx_non_phy
*rx_info
= &(resp
->rx
.general
);
1454 struct statistics_rx
*statistics
= &(resp
->rx
);
1455 unsigned long flags
;
1456 struct statistics_general_data statis
;
1458 data
= &(priv
->sensitivity_data
);
1460 if (!iwl4965_is_associated(priv
)) {
1461 IWL_DEBUG_CALIB("<< - not associated\n");
1465 spin_lock_irqsave(&priv
->lock
, flags
);
1466 if (rx_info
->interference_data_flag
!= INTERFERENCE_DATA_AVAILABLE
) {
1467 IWL_DEBUG_CALIB("<< invalid data.\n");
1468 spin_unlock_irqrestore(&priv
->lock
, flags
);
1472 /* Extract Statistics: */
1473 rx_enable_time
= le32_to_cpu(rx_info
->channel_load
);
1474 fa_cck
= le32_to_cpu(statistics
->cck
.false_alarm_cnt
);
1475 fa_ofdm
= le32_to_cpu(statistics
->ofdm
.false_alarm_cnt
);
1476 bad_plcp_cck
= le32_to_cpu(statistics
->cck
.plcp_err
);
1477 bad_plcp_ofdm
= le32_to_cpu(statistics
->ofdm
.plcp_err
);
1479 statis
.beacon_silence_rssi_a
=
1480 le32_to_cpu(statistics
->general
.beacon_silence_rssi_a
);
1481 statis
.beacon_silence_rssi_b
=
1482 le32_to_cpu(statistics
->general
.beacon_silence_rssi_b
);
1483 statis
.beacon_silence_rssi_c
=
1484 le32_to_cpu(statistics
->general
.beacon_silence_rssi_c
);
1485 statis
.beacon_energy_a
=
1486 le32_to_cpu(statistics
->general
.beacon_energy_a
);
1487 statis
.beacon_energy_b
=
1488 le32_to_cpu(statistics
->general
.beacon_energy_b
);
1489 statis
.beacon_energy_c
=
1490 le32_to_cpu(statistics
->general
.beacon_energy_c
);
1492 spin_unlock_irqrestore(&priv
->lock
, flags
);
1494 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time
);
1496 if (!rx_enable_time
) {
1497 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1501 /* These statistics increase monotonically, and do not reset
1502 * at each beacon. Calculate difference from last value, or just
1503 * use the new statistics value if it has reset or wrapped around. */
1504 if (data
->last_bad_plcp_cnt_cck
> bad_plcp_cck
)
1505 data
->last_bad_plcp_cnt_cck
= bad_plcp_cck
;
1507 bad_plcp_cck
-= data
->last_bad_plcp_cnt_cck
;
1508 data
->last_bad_plcp_cnt_cck
+= bad_plcp_cck
;
1511 if (data
->last_bad_plcp_cnt_ofdm
> bad_plcp_ofdm
)
1512 data
->last_bad_plcp_cnt_ofdm
= bad_plcp_ofdm
;
1514 bad_plcp_ofdm
-= data
->last_bad_plcp_cnt_ofdm
;
1515 data
->last_bad_plcp_cnt_ofdm
+= bad_plcp_ofdm
;
1518 if (data
->last_fa_cnt_ofdm
> fa_ofdm
)
1519 data
->last_fa_cnt_ofdm
= fa_ofdm
;
1521 fa_ofdm
-= data
->last_fa_cnt_ofdm
;
1522 data
->last_fa_cnt_ofdm
+= fa_ofdm
;
1525 if (data
->last_fa_cnt_cck
> fa_cck
)
1526 data
->last_fa_cnt_cck
= fa_cck
;
1528 fa_cck
-= data
->last_fa_cnt_cck
;
1529 data
->last_fa_cnt_cck
+= fa_cck
;
1532 /* Total aborted signal locks */
1533 norm_fa_ofdm
= fa_ofdm
+ bad_plcp_ofdm
;
1534 norm_fa_cck
= fa_cck
+ bad_plcp_cck
;
1536 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck
,
1537 bad_plcp_cck
, fa_ofdm
, bad_plcp_ofdm
);
1539 iwl4965_sens_auto_corr_ofdm(priv
, norm_fa_ofdm
, rx_enable_time
);
1540 iwl4965_sens_energy_cck(priv
, norm_fa_cck
, rx_enable_time
, &statis
);
1541 rc
|= iwl4965_sensitivity_write(priv
, CMD_ASYNC
);
1546 static void iwl4965_bg_sensitivity_work(struct work_struct
*work
)
1548 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
1551 mutex_lock(&priv
->mutex
);
1553 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
1554 test_bit(STATUS_SCANNING
, &priv
->status
)) {
1555 mutex_unlock(&priv
->mutex
);
1559 if (priv
->start_calib
) {
1560 iwl4965_noise_calibration(priv
, &priv
->statistics
);
1562 if (priv
->sensitivity_data
.state
==
1563 IWL_SENS_CALIB_NEED_REINIT
) {
1564 iwl4965_init_sensitivity(priv
, CMD_ASYNC
, 0);
1565 priv
->sensitivity_data
.state
= IWL_SENS_CALIB_ALLOWED
;
1567 iwl4965_sensitivity_calibration(priv
,
1571 mutex_unlock(&priv
->mutex
);
1574 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1576 static void iwl4965_bg_txpower_work(struct work_struct
*work
)
1578 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
1581 /* If a scan happened to start before we got here
1582 * then just return; the statistics notification will
1583 * kick off another scheduled work to compensate for
1584 * any temperature delta we missed here. */
1585 if (test_bit(STATUS_EXIT_PENDING
, &priv
->status
) ||
1586 test_bit(STATUS_SCANNING
, &priv
->status
))
1589 mutex_lock(&priv
->mutex
);
1591 /* Regardless of if we are assocaited, we must reconfigure the
1592 * TX power since frames can be sent on non-radar channels while
1594 iwl4965_hw_reg_send_txpower(priv
);
1596 /* Update last_temperature to keep is_calib_needed from running
1597 * when it isn't needed... */
1598 priv
->last_temperature
= priv
->temperature
;
1600 mutex_unlock(&priv
->mutex
);
1604 * Acquire priv->lock before calling this function !
1606 static void iwl4965_set_wr_ptrs(struct iwl4965_priv
*priv
, int txq_id
, u32 index
)
1608 iwl4965_write_direct32(priv
, HBUS_TARG_WRPTR
,
1609 (index
& 0xff) | (txq_id
<< 8));
1610 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_RDPTR(txq_id
), index
);
1614 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1615 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1616 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1618 * NOTE: Acquire priv->lock before calling this function !
1620 static void iwl4965_tx_queue_set_status(struct iwl4965_priv
*priv
,
1621 struct iwl4965_tx_queue
*txq
,
1622 int tx_fifo_id
, int scd_retry
)
1624 int txq_id
= txq
->q
.id
;
1626 /* Find out whether to activate Tx queue */
1627 int active
= test_bit(txq_id
, &priv
->txq_ctx_active_msk
)?1:0;
1629 /* Set up and activate */
1630 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_STATUS_BITS(txq_id
),
1631 (active
<< SCD_QUEUE_STTS_REG_POS_ACTIVE
) |
1632 (tx_fifo_id
<< SCD_QUEUE_STTS_REG_POS_TXF
) |
1633 (scd_retry
<< SCD_QUEUE_STTS_REG_POS_WSL
) |
1634 (scd_retry
<< SCD_QUEUE_STTS_REG_POS_SCD_ACK
) |
1635 SCD_QUEUE_STTS_REG_MSK
);
1637 txq
->sched_retry
= scd_retry
;
1639 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1640 active
? "Activate" : "Deactivate",
1641 scd_retry
? "BA" : "AC", txq_id
, tx_fifo_id
);
1644 static const u16 default_queue_to_tx_fifo
[] = {
1654 static inline void iwl4965_txq_ctx_activate(struct iwl4965_priv
*priv
, int txq_id
)
1656 set_bit(txq_id
, &priv
->txq_ctx_active_msk
);
1659 static inline void iwl4965_txq_ctx_deactivate(struct iwl4965_priv
*priv
, int txq_id
)
1661 clear_bit(txq_id
, &priv
->txq_ctx_active_msk
);
1664 int iwl4965_alive_notify(struct iwl4965_priv
*priv
)
1668 unsigned long flags
;
1671 spin_lock_irqsave(&priv
->lock
, flags
);
1673 #ifdef CONFIG_IWL4965_SENSITIVITY
1674 memset(&(priv
->sensitivity_data
), 0,
1675 sizeof(struct iwl4965_sensitivity_data
));
1676 memset(&(priv
->chain_noise_data
), 0,
1677 sizeof(struct iwl4965_chain_noise_data
));
1678 for (i
= 0; i
< NUM_RX_CHAINS
; i
++)
1679 priv
->chain_noise_data
.delta_gain_code
[i
] =
1680 CHAIN_NOISE_DELTA_GAIN_INIT_VAL
;
1681 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1682 rc
= iwl4965_grab_nic_access(priv
);
1684 spin_unlock_irqrestore(&priv
->lock
, flags
);
1688 /* Clear 4965's internal Tx Scheduler data base */
1689 priv
->scd_base_addr
= iwl4965_read_prph(priv
, KDR_SCD_SRAM_BASE_ADDR
);
1690 a
= priv
->scd_base_addr
+ SCD_CONTEXT_DATA_OFFSET
;
1691 for (; a
< priv
->scd_base_addr
+ SCD_TX_STTS_BITMAP_OFFSET
; a
+= 4)
1692 iwl4965_write_targ_mem(priv
, a
, 0);
1693 for (; a
< priv
->scd_base_addr
+ SCD_TRANSLATE_TBL_OFFSET
; a
+= 4)
1694 iwl4965_write_targ_mem(priv
, a
, 0);
1695 for (; a
< sizeof(u16
) * priv
->hw_setting
.max_txq_num
; a
+= 4)
1696 iwl4965_write_targ_mem(priv
, a
, 0);
1698 /* Tel 4965 where to find Tx byte count tables */
1699 iwl4965_write_prph(priv
, KDR_SCD_DRAM_BASE_ADDR
,
1700 (priv
->hw_setting
.shared_phys
+
1701 offsetof(struct iwl4965_shared
, queues_byte_cnt_tbls
)) >> 10);
1703 /* Disable chain mode for all queues */
1704 iwl4965_write_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, 0);
1706 /* Initialize each Tx queue (including the command queue) */
1707 for (i
= 0; i
< priv
->hw_setting
.max_txq_num
; i
++) {
1709 /* TFD circular buffer read/write indexes */
1710 iwl4965_write_prph(priv
, KDR_SCD_QUEUE_RDPTR(i
), 0);
1711 iwl4965_write_direct32(priv
, HBUS_TARG_WRPTR
, 0 | (i
<< 8));
1713 /* Max Tx Window size for Scheduler-ACK mode */
1714 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
1715 SCD_CONTEXT_QUEUE_OFFSET(i
),
1717 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS
) &
1718 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK
);
1721 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
1722 SCD_CONTEXT_QUEUE_OFFSET(i
) +
1725 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS
) &
1726 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK
);
1729 iwl4965_write_prph(priv
, KDR_SCD_INTERRUPT_MASK
,
1730 (1 << priv
->hw_setting
.max_txq_num
) - 1);
1732 /* Activate all Tx DMA/FIFO channels */
1733 iwl4965_write_prph(priv
, KDR_SCD_TXFACT
,
1734 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1736 iwl4965_set_wr_ptrs(priv
, IWL_CMD_QUEUE_NUM
, 0);
1738 /* Map each Tx/cmd queue to its corresponding fifo */
1739 for (i
= 0; i
< ARRAY_SIZE(default_queue_to_tx_fifo
); i
++) {
1740 int ac
= default_queue_to_tx_fifo
[i
];
1741 iwl4965_txq_ctx_activate(priv
, i
);
1742 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[i
], ac
, 0);
1745 iwl4965_release_nic_access(priv
);
1746 spin_unlock_irqrestore(&priv
->lock
, flags
);
1752 * iwl4965_hw_set_hw_setting
1754 * Called when initializing driver
1756 int iwl4965_hw_set_hw_setting(struct iwl4965_priv
*priv
)
1758 /* Allocate area for Tx byte count tables and Rx queue status */
1759 priv
->hw_setting
.shared_virt
=
1760 pci_alloc_consistent(priv
->pci_dev
,
1761 sizeof(struct iwl4965_shared
),
1762 &priv
->hw_setting
.shared_phys
);
1764 if (!priv
->hw_setting
.shared_virt
)
1767 memset(priv
->hw_setting
.shared_virt
, 0, sizeof(struct iwl4965_shared
));
1769 priv
->hw_setting
.max_txq_num
= iwl4965_param_queues_num
;
1770 priv
->hw_setting
.ac_queue_count
= AC_NUM
;
1771 priv
->hw_setting
.tx_cmd_len
= sizeof(struct iwl4965_tx_cmd
);
1772 priv
->hw_setting
.max_rxq_size
= RX_QUEUE_SIZE
;
1773 priv
->hw_setting
.max_rxq_log
= RX_QUEUE_SIZE_LOG
;
1775 priv
->hw_setting
.max_stations
= IWL4965_STATION_COUNT
;
1776 priv
->hw_setting
.bcast_sta_id
= IWL4965_BROADCAST_ID
;
1781 * iwl4965_hw_txq_ctx_free - Free TXQ Context
1783 * Destroy all TX DMA queues and structures
1785 void iwl4965_hw_txq_ctx_free(struct iwl4965_priv
*priv
)
1790 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++)
1791 iwl4965_tx_queue_free(priv
, &priv
->txq
[txq_id
]);
1793 /* Keep-warm buffer */
1794 iwl4965_kw_free(priv
);
1798 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
1800 * Does NOT advance any TFD circular buffer read/write indexes
1801 * Does NOT free the TFD itself (which is within circular buffer)
1803 int iwl4965_hw_txq_free_tfd(struct iwl4965_priv
*priv
, struct iwl4965_tx_queue
*txq
)
1805 struct iwl4965_tfd_frame
*bd_tmp
= (struct iwl4965_tfd_frame
*)&txq
->bd
[0];
1806 struct iwl4965_tfd_frame
*bd
= &bd_tmp
[txq
->q
.read_ptr
];
1807 struct pci_dev
*dev
= priv
->pci_dev
;
1812 /* Host command buffers stay mapped in memory, nothing to clean */
1813 if (txq
->q
.id
== IWL_CMD_QUEUE_NUM
)
1816 /* Sanity check on number of chunks */
1817 counter
= IWL_GET_BITS(*bd
, num_tbs
);
1818 if (counter
> MAX_NUM_OF_TBS
) {
1819 IWL_ERROR("Too many chunks: %i\n", counter
);
1820 /* @todo issue fatal error, it is quite serious situation */
1824 /* Unmap chunks, if any.
1825 * TFD info for odd chunks is different format than for even chunks. */
1826 for (i
= 0; i
< counter
; i
++) {
1833 IWL_GET_BITS(bd
->pa
[index
], tb2_addr_lo16
) |
1834 (IWL_GET_BITS(bd
->pa
[index
],
1835 tb2_addr_hi20
) << 16),
1836 IWL_GET_BITS(bd
->pa
[index
], tb2_len
),
1840 pci_unmap_single(dev
,
1841 le32_to_cpu(bd
->pa
[index
].tb1_addr
),
1842 IWL_GET_BITS(bd
->pa
[index
], tb1_len
),
1845 /* Free SKB, if any, for this chunk */
1846 if (txq
->txb
[txq
->q
.read_ptr
].skb
[i
]) {
1847 struct sk_buff
*skb
= txq
->txb
[txq
->q
.read_ptr
].skb
[i
];
1850 txq
->txb
[txq
->q
.read_ptr
].skb
[i
] = NULL
;
1856 int iwl4965_hw_reg_set_txpower(struct iwl4965_priv
*priv
, s8 power
)
1858 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1862 static s32
iwl4965_math_div_round(s32 num
, s32 denom
, s32
*res
)
1875 *res
= ((num
* 2 + denom
) / (denom
* 2)) * sign
;
1881 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1883 * Determines power supply voltage compensation for txpower calculations.
1884 * Returns number of 1/2-dB steps to subtract from gain table index,
1885 * to compensate for difference between power supply voltage during
1886 * factory measurements, vs. current power supply voltage.
1888 * Voltage indication is higher for lower voltage.
1889 * Lower voltage requires more gain (lower gain table index).
1891 static s32
iwl4965_get_voltage_compensation(s32 eeprom_voltage
,
1892 s32 current_voltage
)
1896 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE
== eeprom_voltage
) ||
1897 (TX_POWER_IWL_ILLEGAL_VOLTAGE
== current_voltage
))
1900 iwl4965_math_div_round(current_voltage
- eeprom_voltage
,
1901 TX_POWER_IWL_VOLTAGE_CODES_PER_03V
, &comp
);
1903 if (current_voltage
> eeprom_voltage
)
1905 if ((comp
< -2) || (comp
> 2))
1911 static const struct iwl4965_channel_info
*
1912 iwl4965_get_channel_txpower_info(struct iwl4965_priv
*priv
, u8 phymode
, u16 channel
)
1914 const struct iwl4965_channel_info
*ch_info
;
1916 ch_info
= iwl4965_get_channel_info(priv
, phymode
, channel
);
1918 if (!is_channel_valid(ch_info
))
1924 static s32
iwl4965_get_tx_atten_grp(u16 channel
)
1926 if (channel
>= CALIB_IWL_TX_ATTEN_GR5_FCH
&&
1927 channel
<= CALIB_IWL_TX_ATTEN_GR5_LCH
)
1928 return CALIB_CH_GROUP_5
;
1930 if (channel
>= CALIB_IWL_TX_ATTEN_GR1_FCH
&&
1931 channel
<= CALIB_IWL_TX_ATTEN_GR1_LCH
)
1932 return CALIB_CH_GROUP_1
;
1934 if (channel
>= CALIB_IWL_TX_ATTEN_GR2_FCH
&&
1935 channel
<= CALIB_IWL_TX_ATTEN_GR2_LCH
)
1936 return CALIB_CH_GROUP_2
;
1938 if (channel
>= CALIB_IWL_TX_ATTEN_GR3_FCH
&&
1939 channel
<= CALIB_IWL_TX_ATTEN_GR3_LCH
)
1940 return CALIB_CH_GROUP_3
;
1942 if (channel
>= CALIB_IWL_TX_ATTEN_GR4_FCH
&&
1943 channel
<= CALIB_IWL_TX_ATTEN_GR4_LCH
)
1944 return CALIB_CH_GROUP_4
;
1946 IWL_ERROR("Can't find txatten group for channel %d.\n", channel
);
1950 static u32
iwl4965_get_sub_band(const struct iwl4965_priv
*priv
, u32 channel
)
1954 for (b
= 0; b
< EEPROM_TX_POWER_BANDS
; b
++) {
1955 if (priv
->eeprom
.calib_info
.band_info
[b
].ch_from
== 0)
1958 if ((channel
>= priv
->eeprom
.calib_info
.band_info
[b
].ch_from
)
1959 && (channel
<= priv
->eeprom
.calib_info
.band_info
[b
].ch_to
))
1966 static s32
iwl4965_interpolate_value(s32 x
, s32 x1
, s32 y1
, s32 x2
, s32 y2
)
1973 iwl4965_math_div_round((x2
- x
) * (y1
- y2
), (x2
- x1
), &val
);
1979 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1981 * Interpolates factory measurements from the two sample channels within a
1982 * sub-band, to apply to channel of interest. Interpolation is proportional to
1983 * differences in channel frequencies, which is proportional to differences
1984 * in channel number.
1986 static int iwl4965_interpolate_chan(struct iwl4965_priv
*priv
, u32 channel
,
1987 struct iwl4965_eeprom_calib_ch_info
*chan_info
)
1992 const struct iwl4965_eeprom_calib_measure
*m1
;
1993 const struct iwl4965_eeprom_calib_measure
*m2
;
1994 struct iwl4965_eeprom_calib_measure
*omeas
;
1998 s
= iwl4965_get_sub_band(priv
, channel
);
1999 if (s
>= EEPROM_TX_POWER_BANDS
) {
2000 IWL_ERROR("Tx Power can not find channel %d ", channel
);
2004 ch_i1
= priv
->eeprom
.calib_info
.band_info
[s
].ch1
.ch_num
;
2005 ch_i2
= priv
->eeprom
.calib_info
.band_info
[s
].ch2
.ch_num
;
2006 chan_info
->ch_num
= (u8
) channel
;
2008 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2009 channel
, s
, ch_i1
, ch_i2
);
2011 for (c
= 0; c
< EEPROM_TX_POWER_TX_CHAINS
; c
++) {
2012 for (m
= 0; m
< EEPROM_TX_POWER_MEASUREMENTS
; m
++) {
2013 m1
= &(priv
->eeprom
.calib_info
.band_info
[s
].ch1
.
2014 measurements
[c
][m
]);
2015 m2
= &(priv
->eeprom
.calib_info
.band_info
[s
].ch2
.
2016 measurements
[c
][m
]);
2017 omeas
= &(chan_info
->measurements
[c
][m
]);
2020 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2025 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2026 m1
->gain_idx
, ch_i2
,
2028 omeas
->temperature
=
2029 (u8
) iwl4965_interpolate_value(channel
, ch_i1
,
2034 (s8
) iwl4965_interpolate_value(channel
, ch_i1
,
2039 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c
, m
,
2040 m1
->actual_pow
, m2
->actual_pow
, omeas
->actual_pow
);
2042 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c
, m
,
2043 m1
->gain_idx
, m2
->gain_idx
, omeas
->gain_idx
);
2045 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c
, m
,
2046 m1
->pa_det
, m2
->pa_det
, omeas
->pa_det
);
2048 ("chain %d meas %d T1=%d T2=%d T=%d\n", c
, m
,
2049 m1
->temperature
, m2
->temperature
,
2050 omeas
->temperature
);
2057 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2058 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2059 static s32 back_off_table
[] = {
2060 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2061 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2062 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2063 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2067 /* Thermal compensation values for txpower for various frequency ranges ...
2068 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2069 static struct iwl4965_txpower_comp_entry
{
2070 s32 degrees_per_05db_a
;
2071 s32 degrees_per_05db_a_denom
;
2072 } tx_power_cmp_tble
[CALIB_CH_GROUP_MAX
] = {
2073 {9, 2}, /* group 0 5.2, ch 34-43 */
2074 {4, 1}, /* group 1 5.2, ch 44-70 */
2075 {4, 1}, /* group 2 5.2, ch 71-124 */
2076 {4, 1}, /* group 3 5.2, ch 125-200 */
2077 {3, 1} /* group 4 2.4, ch all */
2080 static s32
get_min_power_index(s32 rate_power_index
, u32 band
)
2083 if ((rate_power_index
& 7) <= 4)
2084 return MIN_TX_GAIN_INDEX_52GHZ_EXT
;
2086 return MIN_TX_GAIN_INDEX
;
2094 static const struct gain_entry gain_table
[2][108] = {
2095 /* 5.2GHz power gain index table */
2097 {123, 0x3F}, /* highest txpower */
2206 /* 2.4GHz power gain index table */
2208 {110, 0x3f}, /* highest txpower */
2319 static int iwl4965_fill_txpower_tbl(struct iwl4965_priv
*priv
, u8 band
, u16 channel
,
2320 u8 is_fat
, u8 ctrl_chan_high
,
2321 struct iwl4965_tx_power_db
*tx_power_tbl
)
2323 u8 saturation_power
;
2325 s32 user_target_power
;
2329 s32 current_regulatory
;
2330 s32 txatten_grp
= CALIB_CH_GROUP_MAX
;
2333 const struct iwl4965_channel_info
*ch_info
= NULL
;
2334 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info
;
2335 const struct iwl4965_eeprom_calib_measure
*measurement
;
2338 s32 voltage_compensation
;
2339 s32 degrees_per_05db_num
;
2340 s32 degrees_per_05db_denom
;
2342 s32 temperature_comp
[2];
2343 s32 factory_gain_index
[2];
2344 s32 factory_actual_pwr
[2];
2347 /* Sanity check requested level (dBm) */
2348 if (priv
->user_txpower_limit
< IWL_TX_POWER_TARGET_POWER_MIN
) {
2349 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2350 priv
->user_txpower_limit
);
2353 if (priv
->user_txpower_limit
> IWL_TX_POWER_TARGET_POWER_MAX
) {
2354 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2355 priv
->user_txpower_limit
);
2359 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2360 * are used for indexing into txpower table) */
2361 user_target_power
= 2 * priv
->user_txpower_limit
;
2363 /* Get current (RXON) channel, band, width */
2365 iwl4965_get_channel_txpower_info(priv
, priv
->phymode
, channel
);
2367 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel
, band
,
2373 /* get txatten group, used to select 1) thermal txpower adjustment
2374 * and 2) mimo txpower balance between Tx chains. */
2375 txatten_grp
= iwl4965_get_tx_atten_grp(channel
);
2376 if (txatten_grp
< 0)
2379 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2380 channel
, txatten_grp
);
2389 /* hardware txpower limits ...
2390 * saturation (clipping distortion) txpowers are in half-dBm */
2392 saturation_power
= priv
->eeprom
.calib_info
.saturation_power24
;
2394 saturation_power
= priv
->eeprom
.calib_info
.saturation_power52
;
2396 if (saturation_power
< IWL_TX_POWER_SATURATION_MIN
||
2397 saturation_power
> IWL_TX_POWER_SATURATION_MAX
) {
2399 saturation_power
= IWL_TX_POWER_DEFAULT_SATURATION_24
;
2401 saturation_power
= IWL_TX_POWER_DEFAULT_SATURATION_52
;
2404 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2405 * max_power_avg values are in dBm, convert * 2 */
2407 reg_limit
= ch_info
->fat_max_power_avg
* 2;
2409 reg_limit
= ch_info
->max_power_avg
* 2;
2411 if ((reg_limit
< IWL_TX_POWER_REGULATORY_MIN
) ||
2412 (reg_limit
> IWL_TX_POWER_REGULATORY_MAX
)) {
2414 reg_limit
= IWL_TX_POWER_DEFAULT_REGULATORY_24
;
2416 reg_limit
= IWL_TX_POWER_DEFAULT_REGULATORY_52
;
2419 /* Interpolate txpower calibration values for this channel,
2420 * based on factory calibration tests on spaced channels. */
2421 iwl4965_interpolate_chan(priv
, channel
, &ch_eeprom_info
);
2423 /* calculate tx gain adjustment based on power supply voltage */
2424 voltage
= priv
->eeprom
.calib_info
.voltage
;
2425 init_voltage
= (s32
)le32_to_cpu(priv
->card_alive_init
.voltage
);
2426 voltage_compensation
=
2427 iwl4965_get_voltage_compensation(voltage
, init_voltage
);
2429 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2431 voltage
, voltage_compensation
);
2433 /* get current temperature (Celsius) */
2434 current_temp
= max(priv
->temperature
, IWL_TX_POWER_TEMPERATURE_MIN
);
2435 current_temp
= min(priv
->temperature
, IWL_TX_POWER_TEMPERATURE_MAX
);
2436 current_temp
= KELVIN_TO_CELSIUS(current_temp
);
2438 /* select thermal txpower adjustment params, based on channel group
2439 * (same frequency group used for mimo txatten adjustment) */
2440 degrees_per_05db_num
=
2441 tx_power_cmp_tble
[txatten_grp
].degrees_per_05db_a
;
2442 degrees_per_05db_denom
=
2443 tx_power_cmp_tble
[txatten_grp
].degrees_per_05db_a_denom
;
2445 /* get per-chain txpower values from factory measurements */
2446 for (c
= 0; c
< 2; c
++) {
2447 measurement
= &ch_eeprom_info
.measurements
[c
][1];
2449 /* txgain adjustment (in half-dB steps) based on difference
2450 * between factory and current temperature */
2451 factory_temp
= measurement
->temperature
;
2452 iwl4965_math_div_round((current_temp
- factory_temp
) *
2453 degrees_per_05db_denom
,
2454 degrees_per_05db_num
,
2455 &temperature_comp
[c
]);
2457 factory_gain_index
[c
] = measurement
->gain_idx
;
2458 factory_actual_pwr
[c
] = measurement
->actual_pow
;
2460 IWL_DEBUG_TXPOWER("chain = %d\n", c
);
2461 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2462 "curr tmp %d, comp %d steps\n",
2463 factory_temp
, current_temp
,
2464 temperature_comp
[c
]);
2466 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2467 factory_gain_index
[c
],
2468 factory_actual_pwr
[c
]);
2471 /* for each of 33 bit-rates (including 1 for CCK) */
2472 for (i
= 0; i
< POWER_TABLE_NUM_ENTRIES
; i
++) {
2474 union iwl4965_tx_power_dual_stream tx_power
;
2476 /* for mimo, reduce each chain's txpower by half
2477 * (3dB, 6 steps), so total output power is regulatory
2480 current_regulatory
= reg_limit
-
2481 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION
;
2484 current_regulatory
= reg_limit
;
2488 /* find txpower limit, either hardware or regulatory */
2489 power_limit
= saturation_power
- back_off_table
[i
];
2490 if (power_limit
> current_regulatory
)
2491 power_limit
= current_regulatory
;
2493 /* reduce user's txpower request if necessary
2494 * for this rate on this channel */
2495 target_power
= user_target_power
;
2496 if (target_power
> power_limit
)
2497 target_power
= power_limit
;
2499 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2500 i
, saturation_power
- back_off_table
[i
],
2501 current_regulatory
, user_target_power
,
2504 /* for each of 2 Tx chains (radio transmitters) */
2505 for (c
= 0; c
< 2; c
++) {
2510 (s32
)le32_to_cpu(priv
->card_alive_init
.
2511 tx_atten
[txatten_grp
][c
]);
2515 /* calculate index; higher index means lower txpower */
2516 power_index
= (u8
) (factory_gain_index
[c
] -
2518 factory_actual_pwr
[c
]) -
2519 temperature_comp
[c
] -
2520 voltage_compensation
+
2523 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2526 if (power_index
< get_min_power_index(i
, band
))
2527 power_index
= get_min_power_index(i
, band
);
2529 /* adjust 5 GHz index to support negative indexes */
2533 /* CCK, rate 32, reduce txpower for CCK */
2534 if (i
== POWER_TABLE_CCK_ENTRY
)
2536 IWL_TX_POWER_CCK_COMPENSATION_C_STEP
;
2538 /* stay within the table! */
2539 if (power_index
> 107) {
2540 IWL_WARNING("txpower index %d > 107\n",
2544 if (power_index
< 0) {
2545 IWL_WARNING("txpower index %d < 0\n",
2550 /* fill txpower command for this rate/chain */
2551 tx_power
.s
.radio_tx_gain
[c
] =
2552 gain_table
[band
][power_index
].radio
;
2553 tx_power
.s
.dsp_predis_atten
[c
] =
2554 gain_table
[band
][power_index
].dsp
;
2556 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2557 "gain 0x%02x dsp %d\n",
2558 c
, atten_value
, power_index
,
2559 tx_power
.s
.radio_tx_gain
[c
],
2560 tx_power
.s
.dsp_predis_atten
[c
]);
2561 }/* for each chain */
2563 tx_power_tbl
->power_tbl
[i
].dw
= cpu_to_le32(tx_power
.dw
);
2565 }/* for each rate */
2571 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2573 * Uses the active RXON for channel, band, and characteristics (fat, high)
2574 * The power limit is taken from priv->user_txpower_limit.
2576 int iwl4965_hw_reg_send_txpower(struct iwl4965_priv
*priv
)
2578 struct iwl4965_txpowertable_cmd cmd
= { 0 };
2582 u8 ctrl_chan_high
= 0;
2584 if (test_bit(STATUS_SCANNING
, &priv
->status
)) {
2585 /* If this gets hit a lot, switch it to a BUG() and catch
2586 * the stack trace to find out who is calling this during
2588 IWL_WARNING("TX Power requested while scanning!\n");
2592 band
= ((priv
->phymode
== MODE_IEEE80211B
) ||
2593 (priv
->phymode
== MODE_IEEE80211G
));
2595 is_fat
= is_fat_channel(priv
->active_rxon
.flags
);
2598 (priv
->active_rxon
.flags
& RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
))
2602 cmd
.channel
= priv
->active_rxon
.channel
;
2604 rc
= iwl4965_fill_txpower_tbl(priv
, band
,
2605 le16_to_cpu(priv
->active_rxon
.channel
),
2606 is_fat
, ctrl_chan_high
, &cmd
.tx_power
);
2610 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_TX_PWR_TABLE_CMD
, sizeof(cmd
), &cmd
);
2614 int iwl4965_hw_channel_switch(struct iwl4965_priv
*priv
, u16 channel
)
2619 u8 ctrl_chan_high
= 0;
2620 struct iwl4965_channel_switch_cmd cmd
= { 0 };
2621 const struct iwl4965_channel_info
*ch_info
;
2623 band
= ((priv
->phymode
== MODE_IEEE80211B
) ||
2624 (priv
->phymode
== MODE_IEEE80211G
));
2626 ch_info
= iwl4965_get_channel_info(priv
, priv
->phymode
, channel
);
2628 is_fat
= is_fat_channel(priv
->staging_rxon
.flags
);
2631 (priv
->active_rxon
.flags
& RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
))
2635 cmd
.expect_beacon
= 0;
2636 cmd
.channel
= cpu_to_le16(channel
);
2637 cmd
.rxon_flags
= priv
->active_rxon
.flags
;
2638 cmd
.rxon_filter_flags
= priv
->active_rxon
.filter_flags
;
2639 cmd
.switch_time
= cpu_to_le32(priv
->ucode_beacon_time
);
2641 cmd
.expect_beacon
= is_channel_radar(ch_info
);
2643 cmd
.expect_beacon
= 1;
2645 rc
= iwl4965_fill_txpower_tbl(priv
, band
, channel
, is_fat
,
2646 ctrl_chan_high
, &cmd
.tx_power
);
2648 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc
);
2652 rc
= iwl4965_send_cmd_pdu(priv
, REPLY_CHANNEL_SWITCH
, sizeof(cmd
), &cmd
);
2656 #define RTS_HCCA_RETRY_LIMIT 3
2657 #define RTS_DFAULT_RETRY_LIMIT 60
2659 void iwl4965_hw_build_tx_cmd_rate(struct iwl4965_priv
*priv
,
2660 struct iwl4965_cmd
*cmd
,
2661 struct ieee80211_tx_control
*ctrl
,
2662 struct ieee80211_hdr
*hdr
, int sta_id
,
2666 u8 rts_retry_limit
= 0;
2667 u8 data_retry_limit
= 0;
2669 u16 fc
= le16_to_cpu(hdr
->frame_control
);
2671 tx_flags
= cmd
->cmd
.tx
.tx_flags
;
2673 rate
= iwl4965_rates
[ctrl
->tx_rate
].plcp
;
2675 rts_retry_limit
= (is_hcca
) ?
2676 RTS_HCCA_RETRY_LIMIT
: RTS_DFAULT_RETRY_LIMIT
;
2678 if (ieee80211_is_probe_response(fc
)) {
2679 data_retry_limit
= 3;
2680 if (data_retry_limit
< rts_retry_limit
)
2681 rts_retry_limit
= data_retry_limit
;
2683 data_retry_limit
= IWL_DEFAULT_TX_RETRY
;
2685 if (priv
->data_retry_limit
!= -1)
2686 data_retry_limit
= priv
->data_retry_limit
;
2688 if ((fc
& IEEE80211_FCTL_FTYPE
) == IEEE80211_FTYPE_MGMT
) {
2689 switch (fc
& IEEE80211_FCTL_STYPE
) {
2690 case IEEE80211_STYPE_AUTH
:
2691 case IEEE80211_STYPE_DEAUTH
:
2692 case IEEE80211_STYPE_ASSOC_REQ
:
2693 case IEEE80211_STYPE_REASSOC_REQ
:
2694 if (tx_flags
& TX_CMD_FLG_RTS_MSK
) {
2695 tx_flags
&= ~TX_CMD_FLG_RTS_MSK
;
2696 tx_flags
|= TX_CMD_FLG_CTS_MSK
;
2704 cmd
->cmd
.tx
.rts_retry_limit
= rts_retry_limit
;
2705 cmd
->cmd
.tx
.data_retry_limit
= data_retry_limit
;
2706 cmd
->cmd
.tx
.rate_n_flags
= iwl4965_hw_set_rate_n_flags(rate
, 0);
2707 cmd
->cmd
.tx
.tx_flags
= tx_flags
;
2710 int iwl4965_hw_get_rx_read(struct iwl4965_priv
*priv
)
2712 struct iwl4965_shared
*shared_data
= priv
->hw_setting
.shared_virt
;
2714 return IWL_GET_BITS(*shared_data
, rb_closed_stts_rb_num
);
2717 int iwl4965_hw_get_temperature(struct iwl4965_priv
*priv
)
2719 return priv
->temperature
;
2722 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl4965_priv
*priv
,
2723 struct iwl4965_frame
*frame
, u8 rate
)
2725 struct iwl4965_tx_beacon_cmd
*tx_beacon_cmd
;
2726 unsigned int frame_size
;
2728 tx_beacon_cmd
= &frame
->u
.beacon
;
2729 memset(tx_beacon_cmd
, 0, sizeof(*tx_beacon_cmd
));
2731 tx_beacon_cmd
->tx
.sta_id
= IWL4965_BROADCAST_ID
;
2732 tx_beacon_cmd
->tx
.stop_time
.life_time
= TX_CMD_LIFE_TIME_INFINITE
;
2734 frame_size
= iwl4965_fill_beacon_frame(priv
,
2735 tx_beacon_cmd
->frame
,
2736 iwl4965_broadcast_addr
,
2737 sizeof(frame
->u
) - sizeof(*tx_beacon_cmd
));
2739 BUG_ON(frame_size
> MAX_MPDU_SIZE
);
2740 tx_beacon_cmd
->tx
.len
= cpu_to_le16((u16
)frame_size
);
2742 if ((rate
== IWL_RATE_1M_PLCP
) || (rate
>= IWL_RATE_2M_PLCP
))
2743 tx_beacon_cmd
->tx
.rate_n_flags
=
2744 iwl4965_hw_set_rate_n_flags(rate
, RATE_MCS_CCK_MSK
);
2746 tx_beacon_cmd
->tx
.rate_n_flags
=
2747 iwl4965_hw_set_rate_n_flags(rate
, 0);
2749 tx_beacon_cmd
->tx
.tx_flags
= (TX_CMD_FLG_SEQ_CTL_MSK
|
2750 TX_CMD_FLG_TSF_MSK
| TX_CMD_FLG_STA_RATE_MSK
);
2751 return (sizeof(*tx_beacon_cmd
) + frame_size
);
2755 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
2756 * given Tx queue, and enable the DMA channel used for that queue.
2758 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
2759 * channels supported in hardware.
2761 int iwl4965_hw_tx_queue_init(struct iwl4965_priv
*priv
, struct iwl4965_tx_queue
*txq
)
2764 unsigned long flags
;
2765 int txq_id
= txq
->q
.id
;
2767 spin_lock_irqsave(&priv
->lock
, flags
);
2768 rc
= iwl4965_grab_nic_access(priv
);
2770 spin_unlock_irqrestore(&priv
->lock
, flags
);
2774 /* Circular buffer (TFD queue in DRAM) physical base address */
2775 iwl4965_write_direct32(priv
, FH_MEM_CBBC_QUEUE(txq_id
),
2776 txq
->q
.dma_addr
>> 8);
2778 /* Enable DMA channel, using same id as for TFD queue */
2779 iwl4965_write_direct32(
2780 priv
, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id
),
2781 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE
|
2782 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
);
2783 iwl4965_release_nic_access(priv
);
2784 spin_unlock_irqrestore(&priv
->lock
, flags
);
2789 static inline u8
iwl4965_get_dma_hi_address(dma_addr_t addr
)
2791 return sizeof(addr
) > sizeof(u32
) ? (addr
>> 16) >> 16 : 0;
2794 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl4965_priv
*priv
, void *ptr
,
2795 dma_addr_t addr
, u16 len
)
2798 struct iwl4965_tfd_frame
*tfd
= ptr
;
2799 u32 num_tbs
= IWL_GET_BITS(*tfd
, num_tbs
);
2801 /* Each TFD can point to a maximum 20 Tx buffers */
2802 if ((num_tbs
>= MAX_NUM_OF_TBS
) || (num_tbs
< 0)) {
2803 IWL_ERROR("Error can not send more than %d chunks\n",
2808 index
= num_tbs
/ 2;
2809 is_odd
= num_tbs
& 0x1;
2812 tfd
->pa
[index
].tb1_addr
= cpu_to_le32(addr
);
2813 IWL_SET_BITS(tfd
->pa
[index
], tb1_addr_hi
,
2814 iwl4965_get_dma_hi_address(addr
));
2815 IWL_SET_BITS(tfd
->pa
[index
], tb1_len
, len
);
2817 IWL_SET_BITS(tfd
->pa
[index
], tb2_addr_lo16
,
2818 (u32
) (addr
& 0xffff));
2819 IWL_SET_BITS(tfd
->pa
[index
], tb2_addr_hi20
, addr
>> 16);
2820 IWL_SET_BITS(tfd
->pa
[index
], tb2_len
, len
);
2823 IWL_SET_BITS(*tfd
, num_tbs
, num_tbs
+ 1);
2828 static void iwl4965_hw_card_show_info(struct iwl4965_priv
*priv
)
2830 u16 hw_version
= priv
->eeprom
.board_revision_4965
;
2832 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
2833 ((hw_version
>> 8) & 0x0F),
2834 ((hw_version
>> 8) >> 4), (hw_version
& 0x00FF));
2836 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
2837 priv
->eeprom
.board_pba_number_4965
);
2840 #define IWL_TX_CRC_SIZE 4
2841 #define IWL_TX_DELIMITER_SIZE 4
2844 * iwl4965_tx_queue_update_wr_ptr - Set up entry in Tx byte-count array
2846 int iwl4965_tx_queue_update_wr_ptr(struct iwl4965_priv
*priv
,
2847 struct iwl4965_tx_queue
*txq
, u16 byte_cnt
)
2850 int txq_id
= txq
->q
.id
;
2851 struct iwl4965_shared
*shared_data
= priv
->hw_setting
.shared_virt
;
2853 if (txq
->need_update
== 0)
2856 len
= byte_cnt
+ IWL_TX_CRC_SIZE
+ IWL_TX_DELIMITER_SIZE
;
2858 /* Set up byte count within first 256 entries */
2859 IWL_SET_BITS16(shared_data
->queues_byte_cnt_tbls
[txq_id
].
2860 tfd_offset
[txq
->q
.write_ptr
], byte_cnt
, len
);
2862 /* If within first 64 entries, duplicate at end */
2863 if (txq
->q
.write_ptr
< IWL4965_MAX_WIN_SIZE
)
2864 IWL_SET_BITS16(shared_data
->queues_byte_cnt_tbls
[txq_id
].
2865 tfd_offset
[IWL4965_QUEUE_SIZE
+ txq
->q
.write_ptr
],
2872 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
2874 * Selects how many and which Rx receivers/antennas/chains to use.
2875 * This should not be used for scan command ... it puts data in wrong place.
2877 void iwl4965_set_rxon_chain(struct iwl4965_priv
*priv
)
2879 u8 is_single
= is_single_stream(priv
);
2880 u8 idle_state
, rx_state
;
2882 priv
->staging_rxon
.rx_chain
= 0;
2883 rx_state
= idle_state
= 3;
2885 /* Tell uCode which antennas are actually connected.
2886 * Before first association, we assume all antennas are connected.
2887 * Just after first association, iwl4965_noise_calibration()
2888 * checks which antennas actually *are* connected. */
2889 priv
->staging_rxon
.rx_chain
|=
2890 cpu_to_le16(priv
->valid_antenna
<< RXON_RX_CHAIN_VALID_POS
);
2892 /* How many receivers should we use? */
2893 iwl4965_get_rx_chain_counter(priv
, &idle_state
, &rx_state
);
2894 priv
->staging_rxon
.rx_chain
|=
2895 cpu_to_le16(rx_state
<< RXON_RX_CHAIN_MIMO_CNT_POS
);
2896 priv
->staging_rxon
.rx_chain
|=
2897 cpu_to_le16(idle_state
<< RXON_RX_CHAIN_CNT_POS
);
2899 if (!is_single
&& (rx_state
>= 2) &&
2900 !test_bit(STATUS_POWER_PMI
, &priv
->status
))
2901 priv
->staging_rxon
.rx_chain
|= RXON_RX_CHAIN_MIMO_FORCE_MSK
;
2903 priv
->staging_rxon
.rx_chain
&= ~RXON_RX_CHAIN_MIMO_FORCE_MSK
;
2905 IWL_DEBUG_ASSOC("rx chain %X\n", priv
->staging_rxon
.rx_chain
);
2908 #ifdef CONFIG_IWL4965_HT
2909 #ifdef CONFIG_IWL4965_HT_AGG
2911 get the traffic load value for tid
2913 static u32
iwl4965_tl_get_load(struct iwl4965_priv
*priv
, u8 tid
)
2916 u32 current_time
= jiffies_to_msecs(jiffies
);
2919 unsigned long flags
;
2920 struct iwl4965_traffic_load
*tid_ptr
= NULL
;
2922 if (tid
>= TID_MAX_LOAD_COUNT
)
2925 tid_ptr
= &(priv
->lq_mngr
.agg_ctrl
.traffic_load
[tid
]);
2927 current_time
-= current_time
% TID_ROUND_VALUE
;
2929 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
2930 if (!(tid_ptr
->queue_count
))
2933 time_diff
= TIME_WRAP_AROUND(tid_ptr
->time_stamp
, current_time
);
2934 index
= time_diff
/ TID_QUEUE_CELL_SPACING
;
2936 if (index
>= TID_QUEUE_MAX_SIZE
) {
2937 u32 oldest_time
= current_time
- TID_MAX_TIME_DIFF
;
2939 while (tid_ptr
->queue_count
&&
2940 (tid_ptr
->time_stamp
< oldest_time
)) {
2941 tid_ptr
->total
-= tid_ptr
->packet_count
[tid_ptr
->head
];
2942 tid_ptr
->packet_count
[tid_ptr
->head
] = 0;
2943 tid_ptr
->time_stamp
+= TID_QUEUE_CELL_SPACING
;
2944 tid_ptr
->queue_count
--;
2946 if (tid_ptr
->head
>= TID_QUEUE_MAX_SIZE
)
2950 load
= tid_ptr
->total
;
2953 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
2958 increment traffic load value for tid and also remove
2959 any old values if passed the certian time period
2961 static void iwl4965_tl_add_packet(struct iwl4965_priv
*priv
, u8 tid
)
2963 u32 current_time
= jiffies_to_msecs(jiffies
);
2966 unsigned long flags
;
2967 struct iwl4965_traffic_load
*tid_ptr
= NULL
;
2969 if (tid
>= TID_MAX_LOAD_COUNT
)
2972 tid_ptr
= &(priv
->lq_mngr
.agg_ctrl
.traffic_load
[tid
]);
2974 current_time
-= current_time
% TID_ROUND_VALUE
;
2976 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
2977 if (!(tid_ptr
->queue_count
)) {
2979 tid_ptr
->time_stamp
= current_time
;
2980 tid_ptr
->queue_count
= 1;
2982 tid_ptr
->packet_count
[0] = 1;
2986 time_diff
= TIME_WRAP_AROUND(tid_ptr
->time_stamp
, current_time
);
2987 index
= time_diff
/ TID_QUEUE_CELL_SPACING
;
2989 if (index
>= TID_QUEUE_MAX_SIZE
) {
2990 u32 oldest_time
= current_time
- TID_MAX_TIME_DIFF
;
2992 while (tid_ptr
->queue_count
&&
2993 (tid_ptr
->time_stamp
< oldest_time
)) {
2994 tid_ptr
->total
-= tid_ptr
->packet_count
[tid_ptr
->head
];
2995 tid_ptr
->packet_count
[tid_ptr
->head
] = 0;
2996 tid_ptr
->time_stamp
+= TID_QUEUE_CELL_SPACING
;
2997 tid_ptr
->queue_count
--;
2999 if (tid_ptr
->head
>= TID_QUEUE_MAX_SIZE
)
3004 index
= (tid_ptr
->head
+ index
) % TID_QUEUE_MAX_SIZE
;
3005 tid_ptr
->packet_count
[index
] = tid_ptr
->packet_count
[index
] + 1;
3006 tid_ptr
->total
= tid_ptr
->total
+ 1;
3008 if ((index
+ 1) > tid_ptr
->queue_count
)
3009 tid_ptr
->queue_count
= index
+ 1;
3011 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3015 #define MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS 7
3017 BA_STATUS_FAILURE
= 0,
3018 BA_STATUS_INITIATOR_DELBA
,
3019 BA_STATUS_RECIPIENT_DELBA
,
3020 BA_STATUS_RENEW_ADDBA_REQUEST
,
3025 * iwl4964_tl_ba_avail - Find out if an unused aggregation queue is available
3027 static u8
iwl4964_tl_ba_avail(struct iwl4965_priv
*priv
)
3030 struct iwl4965_lq_mngr
*lq
;
3034 lq
= (struct iwl4965_lq_mngr
*)&(priv
->lq_mngr
);
3036 /* Find out how many agg queues are in use */
3037 for (i
= 0; i
< TID_MAX_LOAD_COUNT
; i
++) {
3039 if ((lq
->agg_ctrl
.granted_ba
& msk
) ||
3040 (lq
->agg_ctrl
.wait_for_agg_status
& msk
))
3044 if (count
< MMAC_SCHED_MAX_NUMBER_OF_HT_BACK_FLOWS
)
3050 static void iwl4965_ba_status(struct iwl4965_priv
*priv
,
3051 u8 tid
, enum HT_STATUS status
);
3053 static int iwl4965_perform_addba(struct iwl4965_priv
*priv
, u8 tid
, u32 length
,
3058 rc
= ieee80211_start_BA_session(priv
->hw
, priv
->bssid
, tid
);
3060 iwl4965_ba_status(priv
, tid
, BA_STATUS_FAILURE
);
3065 static int iwl4965_perform_delba(struct iwl4965_priv
*priv
, u8 tid
)
3069 rc
= ieee80211_stop_BA_session(priv
->hw
, priv
->bssid
, tid
);
3071 iwl4965_ba_status(priv
, tid
, BA_STATUS_FAILURE
);
3076 static void iwl4965_turn_on_agg_for_tid(struct iwl4965_priv
*priv
,
3077 struct iwl4965_lq_mngr
*lq
,
3078 u8 auto_agg
, u8 tid
)
3080 u32 tid_msk
= (1 << tid
);
3081 unsigned long flags
;
3083 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3085 if ((auto_agg) && (!lq->enable_counter)){
3086 lq->agg_ctrl.next_retry = 0;
3087 lq->agg_ctrl.tid_retry = 0;
3088 spin_unlock_irqrestore(&priv->lq_mngr.lock, flags);
3092 if (!(lq
->agg_ctrl
.granted_ba
& tid_msk
) &&
3093 (lq
->agg_ctrl
.requested_ba
& tid_msk
)) {
3094 u8 available_queues
;
3097 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3098 available_queues
= iwl4964_tl_ba_avail(priv
);
3099 load
= iwl4965_tl_get_load(priv
, tid
);
3101 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3102 if (!available_queues
) {
3104 lq
->agg_ctrl
.tid_retry
|= tid_msk
;
3106 lq
->agg_ctrl
.requested_ba
&= ~tid_msk
;
3107 lq
->agg_ctrl
.wait_for_agg_status
&= ~tid_msk
;
3109 } else if ((auto_agg
) &&
3110 ((load
<= lq
->agg_ctrl
.tid_traffic_load_threshold
) ||
3111 ((lq
->agg_ctrl
.wait_for_agg_status
& tid_msk
))))
3112 lq
->agg_ctrl
.tid_retry
|= tid_msk
;
3114 lq
->agg_ctrl
.wait_for_agg_status
|= tid_msk
;
3115 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3116 iwl4965_perform_addba(priv
, tid
, 0x40,
3117 lq
->agg_ctrl
.ba_timeout
);
3118 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3121 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3124 static void iwl4965_turn_on_agg(struct iwl4965_priv
*priv
, u8 tid
)
3126 struct iwl4965_lq_mngr
*lq
;
3127 unsigned long flags
;
3129 lq
= (struct iwl4965_lq_mngr
*)&(priv
->lq_mngr
);
3131 if ((tid
< TID_MAX_LOAD_COUNT
))
3132 iwl4965_turn_on_agg_for_tid(priv
, lq
, lq
->agg_ctrl
.auto_agg
,
3134 else if (tid
== TID_ALL_SPECIFIED
) {
3135 if (lq
->agg_ctrl
.requested_ba
) {
3136 for (tid
= 0; tid
< TID_MAX_LOAD_COUNT
; tid
++)
3137 iwl4965_turn_on_agg_for_tid(priv
, lq
,
3138 lq
->agg_ctrl
.auto_agg
, tid
);
3140 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3141 lq
->agg_ctrl
.tid_retry
= 0;
3142 lq
->agg_ctrl
.next_retry
= 0;
3143 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3149 void iwl4965_turn_off_agg(struct iwl4965_priv
*priv
, u8 tid
)
3152 struct iwl4965_lq_mngr
*lq
;
3153 unsigned long flags
;
3155 lq
= (struct iwl4965_lq_mngr
*)&(priv
->lq_mngr
);
3157 if ((tid
< TID_MAX_LOAD_COUNT
)) {
3159 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3160 lq
->agg_ctrl
.wait_for_agg_status
|= tid_msk
;
3161 lq
->agg_ctrl
.requested_ba
&= ~tid_msk
;
3162 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3163 iwl4965_perform_delba(priv
, tid
);
3164 } else if (tid
== TID_ALL_SPECIFIED
) {
3165 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3166 for (tid
= 0; tid
< TID_MAX_LOAD_COUNT
; tid
++) {
3168 lq
->agg_ctrl
.wait_for_agg_status
|= tid_msk
;
3169 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3170 iwl4965_perform_delba(priv
, tid
);
3171 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3173 lq
->agg_ctrl
.requested_ba
= 0;
3174 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3179 * iwl4965_ba_status - Update driver's link quality mgr with tid's HT status
3181 static void iwl4965_ba_status(struct iwl4965_priv
*priv
,
3182 u8 tid
, enum HT_STATUS status
)
3184 struct iwl4965_lq_mngr
*lq
;
3185 u32 tid_msk
= (1 << tid
);
3186 unsigned long flags
;
3188 lq
= (struct iwl4965_lq_mngr
*)&(priv
->lq_mngr
);
3190 if ((tid
>= TID_MAX_LOAD_COUNT
))
3193 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3195 case BA_STATUS_ACTIVE
:
3196 if (!(lq
->agg_ctrl
.granted_ba
& tid_msk
))
3197 lq
->agg_ctrl
.granted_ba
|= tid_msk
;
3200 if ((lq
->agg_ctrl
.granted_ba
& tid_msk
))
3201 lq
->agg_ctrl
.granted_ba
&= ~tid_msk
;
3205 lq
->agg_ctrl
.wait_for_agg_status
&= ~tid_msk
;
3206 if (status
!= BA_STATUS_ACTIVE
) {
3207 if (lq
->agg_ctrl
.auto_agg
) {
3208 lq
->agg_ctrl
.tid_retry
|= tid_msk
;
3209 lq
->agg_ctrl
.next_retry
=
3210 jiffies
+ msecs_to_jiffies(500);
3212 lq
->agg_ctrl
.requested_ba
&= ~tid_msk
;
3214 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3219 static void iwl4965_bg_agg_work(struct work_struct
*work
)
3221 struct iwl4965_priv
*priv
= container_of(work
, struct iwl4965_priv
,
3227 unsigned long flags
;
3228 struct iwl4965_lq_mngr
*lq
= (struct iwl4965_lq_mngr
*)&(priv
->lq_mngr
);
3230 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3231 retry_tid
= lq
->agg_ctrl
.tid_retry
;
3232 lq
->agg_ctrl
.tid_retry
= 0;
3233 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3235 if (retry_tid
== TID_ALL_SPECIFIED
)
3236 iwl4965_turn_on_agg(priv
, TID_ALL_SPECIFIED
);
3238 for (tid
= 0; tid
< TID_MAX_LOAD_COUNT
; tid
++) {
3239 tid_msk
= (1 << tid
);
3240 if (retry_tid
& tid_msk
)
3241 iwl4965_turn_on_agg(priv
, tid
);
3245 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3246 if (lq
->agg_ctrl
.tid_retry
)
3247 lq
->agg_ctrl
.next_retry
= jiffies
+ msecs_to_jiffies(500);
3248 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3251 #endif /*CONFIG_IWL4965_HT_AGG */
3252 #endif /* CONFIG_IWL4965_HT */
3254 int iwl4965_tx_cmd(struct iwl4965_priv
*priv
, struct iwl4965_cmd
*out_cmd
,
3255 u8 sta_id
, dma_addr_t txcmd_phys
,
3256 struct ieee80211_hdr
*hdr
, u8 hdr_len
,
3257 struct ieee80211_tx_control
*ctrl
, void *sta_in
)
3259 struct iwl4965_tx_cmd cmd
;
3260 struct iwl4965_tx_cmd
*tx
= (struct iwl4965_tx_cmd
*)&out_cmd
->cmd
.payload
[0];
3261 dma_addr_t scratch_phys
;
3266 int rate_index
= min(ctrl
->tx_rate
& 0xffff, IWL_RATE_COUNT
- 1);
3267 #ifdef CONFIG_IWL4965_HT
3268 #ifdef CONFIG_IWL4965_HT_AGG
3270 #endif /*CONFIG_IWL4965_HT_AGG */
3271 #endif /* CONFIG_IWL4965_HT */
3273 unicast
= !is_multicast_ether_addr(hdr
->addr1
);
3275 fc
= le16_to_cpu(hdr
->frame_control
);
3276 if ((fc
& IEEE80211_FCTL_FTYPE
) != IEEE80211_FTYPE_DATA
)
3279 memcpy(&cmd
, &(out_cmd
->cmd
.tx
), sizeof(struct iwl4965_tx_cmd
));
3280 memset(tx
, 0, sizeof(struct iwl4965_tx_cmd
));
3281 memcpy(tx
->hdr
, hdr
, hdr_len
);
3284 tx
->driver_txop
= cmd
.driver_txop
;
3285 tx
->stop_time
.life_time
= cmd
.stop_time
.life_time
;
3286 tx
->tx_flags
= cmd
.tx_flags
;
3287 tx
->sta_id
= cmd
.sta_id
;
3288 tx
->tid_tspec
= cmd
.tid_tspec
;
3289 tx
->timeout
.pm_frame_timeout
= cmd
.timeout
.pm_frame_timeout
;
3290 tx
->next_frame_len
= cmd
.next_frame_len
;
3292 tx
->sec_ctl
= cmd
.sec_ctl
;
3293 memcpy(&(tx
->key
[0]), &(cmd
.key
[0]), 16);
3294 tx
->tx_flags
= cmd
.tx_flags
;
3296 tx
->rts_retry_limit
= cmd
.rts_retry_limit
;
3297 tx
->data_retry_limit
= cmd
.data_retry_limit
;
3299 scratch_phys
= txcmd_phys
+ sizeof(struct iwl4965_cmd_header
) +
3300 offsetof(struct iwl4965_tx_cmd
, scratch
);
3301 tx
->dram_lsb_ptr
= cpu_to_le32(scratch_phys
);
3302 tx
->dram_msb_ptr
= iwl4965_get_dma_hi_address(scratch_phys
);
3304 /* Hard coded to start at the highest retry fallback position
3305 * until the 4965 specific rate control algorithm is tied in */
3306 tx
->initial_rate_index
= LINK_QUAL_MAX_RETRY_NUM
- 1;
3308 /* Alternate between antenna A and B for successive frames */
3309 if (priv
->use_ant_b_for_management_frame
) {
3310 priv
->use_ant_b_for_management_frame
= 0;
3311 rate_flags
= RATE_MCS_ANT_B_MSK
;
3313 priv
->use_ant_b_for_management_frame
= 1;
3314 rate_flags
= RATE_MCS_ANT_A_MSK
;
3317 if (!unicast
|| !is_data
) {
3318 if ((rate_index
>= IWL_FIRST_CCK_RATE
) &&
3319 (rate_index
<= IWL_LAST_CCK_RATE
))
3320 rate_flags
|= RATE_MCS_CCK_MSK
;
3322 tx
->initial_rate_index
= 0;
3323 tx
->tx_flags
|= TX_CMD_FLG_STA_RATE_MSK
;
3326 tx
->rate_n_flags
= iwl4965_hw_set_rate_n_flags(iwl4965_rates
[rate_index
].plcp
,
3329 if (ieee80211_is_back_request(fc
))
3330 tx
->tx_flags
|= TX_CMD_FLG_ACK_MSK
|
3331 TX_CMD_FLG_IMM_BA_RSP_MASK
;
3332 #ifdef CONFIG_IWL4965_HT
3333 #ifdef CONFIG_IWL4965_HT_AGG
3334 qc
= ieee80211_get_qos_ctrl(hdr
);
3336 (priv
->iw_mode
!= IEEE80211_IF_TYPE_IBSS
)) {
3338 tid
= (u8
) (le16_to_cpu(*qc
) & 0xF);
3339 if (tid
< TID_MAX_LOAD_COUNT
)
3340 iwl4965_tl_add_packet(priv
, tid
);
3343 if (priv
->lq_mngr
.agg_ctrl
.next_retry
&&
3344 (time_after(priv
->lq_mngr
.agg_ctrl
.next_retry
, jiffies
))) {
3345 unsigned long flags
;
3347 spin_lock_irqsave(&priv
->lq_mngr
.lock
, flags
);
3348 priv
->lq_mngr
.agg_ctrl
.next_retry
= 0;
3349 spin_unlock_irqrestore(&priv
->lq_mngr
.lock
, flags
);
3350 schedule_work(&priv
->agg_work
);
3358 * sign_extend - Sign extend a value using specified bit as sign-bit
3360 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3361 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3363 * @param oper value to sign extend
3364 * @param index 0 based bit index (0<=index<32) to sign bit
3366 static s32
sign_extend(u32 oper
, int index
)
3368 u8 shift
= 31 - index
;
3370 return (s32
)(oper
<< shift
) >> shift
;
3374 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3375 * @statistics: Provides the temperature reading from the uCode
3377 * A return of <0 indicates bogus data in the statistics
3379 int iwl4965_get_temperature(const struct iwl4965_priv
*priv
)
3386 if (test_bit(STATUS_TEMPERATURE
, &priv
->status
) &&
3387 (priv
->statistics
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
)) {
3388 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3389 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[1]);
3390 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[1]);
3391 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[1]);
3392 R4
= le32_to_cpu(priv
->card_alive_init
.therm_r4
[1]);
3394 IWL_DEBUG_TEMP("Running temperature calibration\n");
3395 R1
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r1
[0]);
3396 R2
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r2
[0]);
3397 R3
= (s32
)le32_to_cpu(priv
->card_alive_init
.therm_r3
[0]);
3398 R4
= le32_to_cpu(priv
->card_alive_init
.therm_r4
[0]);
3402 * Temperature is only 23 bits, so sign extend out to 32.
3404 * NOTE If we haven't received a statistics notification yet
3405 * with an updated temperature, use R4 provided to us in the
3406 * "initialize" ALIVE response.
3408 if (!test_bit(STATUS_TEMPERATURE
, &priv
->status
))
3409 vt
= sign_extend(R4
, 23);
3412 le32_to_cpu(priv
->statistics
.general
.temperature
), 23);
3414 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3418 IWL_ERROR("Calibration conflict R1 == R3\n");
3422 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3423 * Add offset to center the adjustment around 0 degrees Centigrade. */
3424 temperature
= TEMPERATURE_CALIB_A_VAL
* (vt
- R2
);
3425 temperature
/= (R3
- R1
);
3426 temperature
= (temperature
* 97) / 100 +
3427 TEMPERATURE_CALIB_KELVIN_OFFSET
;
3429 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature
,
3430 KELVIN_TO_CELSIUS(temperature
));
3435 /* Adjust Txpower only if temperature variance is greater than threshold. */
3436 #define IWL_TEMPERATURE_THRESHOLD 3
3439 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3441 * If the temperature changed has changed sufficiently, then a recalibration
3444 * Assumes caller will replace priv->last_temperature once calibration
3447 static int iwl4965_is_temp_calib_needed(struct iwl4965_priv
*priv
)
3451 if (!test_bit(STATUS_STATISTICS
, &priv
->status
)) {
3452 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3456 temp_diff
= priv
->temperature
- priv
->last_temperature
;
3458 /* get absolute value */
3459 if (temp_diff
< 0) {
3460 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff
);
3461 temp_diff
= -temp_diff
;
3462 } else if (temp_diff
== 0)
3463 IWL_DEBUG_POWER("Same temp, \n");
3465 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff
);
3467 if (temp_diff
< IWL_TEMPERATURE_THRESHOLD
) {
3468 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3472 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3477 /* Calculate noise level, based on measurements during network silence just
3478 * before arriving beacon. This measurement can be done only if we know
3479 * exactly when to expect beacons, therefore only when we're associated. */
3480 static void iwl4965_rx_calc_noise(struct iwl4965_priv
*priv
)
3482 struct statistics_rx_non_phy
*rx_info
3483 = &(priv
->statistics
.rx
.general
);
3484 int num_active_rx
= 0;
3485 int total_silence
= 0;
3487 le32_to_cpu(rx_info
->beacon_silence_rssi_a
) & IN_BAND_FILTER
;
3489 le32_to_cpu(rx_info
->beacon_silence_rssi_b
) & IN_BAND_FILTER
;
3491 le32_to_cpu(rx_info
->beacon_silence_rssi_c
) & IN_BAND_FILTER
;
3493 if (bcn_silence_a
) {
3494 total_silence
+= bcn_silence_a
;
3497 if (bcn_silence_b
) {
3498 total_silence
+= bcn_silence_b
;
3501 if (bcn_silence_c
) {
3502 total_silence
+= bcn_silence_c
;
3506 /* Average among active antennas */
3508 priv
->last_rx_noise
= (total_silence
/ num_active_rx
) - 107;
3510 priv
->last_rx_noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3512 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3513 bcn_silence_a
, bcn_silence_b
, bcn_silence_c
,
3514 priv
->last_rx_noise
);
3517 void iwl4965_hw_rx_statistics(struct iwl4965_priv
*priv
, struct iwl4965_rx_mem_buffer
*rxb
)
3519 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3523 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3524 (int)sizeof(priv
->statistics
), pkt
->len
);
3526 change
= ((priv
->statistics
.general
.temperature
!=
3527 pkt
->u
.stats
.general
.temperature
) ||
3528 ((priv
->statistics
.flag
&
3529 STATISTICS_REPLY_FLG_FAT_MODE_MSK
) !=
3530 (pkt
->u
.stats
.flag
& STATISTICS_REPLY_FLG_FAT_MODE_MSK
)));
3532 memcpy(&priv
->statistics
, &pkt
->u
.stats
, sizeof(priv
->statistics
));
3534 set_bit(STATUS_STATISTICS
, &priv
->status
);
3536 /* Reschedule the statistics timer to occur in
3537 * REG_RECALIB_PERIOD seconds to ensure we get a
3538 * thermal update even if the uCode doesn't give
3540 mod_timer(&priv
->statistics_periodic
, jiffies
+
3541 msecs_to_jiffies(REG_RECALIB_PERIOD
* 1000));
3543 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)) &&
3544 (pkt
->hdr
.cmd
== STATISTICS_NOTIFICATION
)) {
3545 iwl4965_rx_calc_noise(priv
);
3546 #ifdef CONFIG_IWL4965_SENSITIVITY
3547 queue_work(priv
->workqueue
, &priv
->sensitivity_work
);
3551 /* If the hardware hasn't reported a change in
3552 * temperature then don't bother computing a
3553 * calibrated temperature value */
3557 temp
= iwl4965_get_temperature(priv
);
3561 if (priv
->temperature
!= temp
) {
3562 if (priv
->temperature
)
3563 IWL_DEBUG_TEMP("Temperature changed "
3564 "from %dC to %dC\n",
3565 KELVIN_TO_CELSIUS(priv
->temperature
),
3566 KELVIN_TO_CELSIUS(temp
));
3568 IWL_DEBUG_TEMP("Temperature "
3569 "initialized to %dC\n",
3570 KELVIN_TO_CELSIUS(temp
));
3573 priv
->temperature
= temp
;
3574 set_bit(STATUS_TEMPERATURE
, &priv
->status
);
3576 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)) &&
3577 iwl4965_is_temp_calib_needed(priv
))
3578 queue_work(priv
->workqueue
, &priv
->txpower_work
);
3581 static void iwl4965_handle_data_packet(struct iwl4965_priv
*priv
, int is_data
,
3583 struct iwl4965_rx_mem_buffer
*rxb
,
3584 struct ieee80211_rx_status
*stats
)
3586 struct iwl4965_rx_packet
*pkt
= (struct iwl4965_rx_packet
*)rxb
->skb
->data
;
3587 struct iwl4965_rx_phy_res
*rx_start
= (include_phy
) ?
3588 (struct iwl4965_rx_phy_res
*)&(pkt
->u
.raw
[0]) : NULL
;
3589 struct ieee80211_hdr
*hdr
;
3592 unsigned int skblen
;
3595 if (!include_phy
&& priv
->last_phy_res
[0])
3596 rx_start
= (struct iwl4965_rx_phy_res
*)&priv
->last_phy_res
[1];
3599 IWL_ERROR("MPDU frame without a PHY data\n");
3603 hdr
= (struct ieee80211_hdr
*)((u8
*) & rx_start
[1] +
3604 rx_start
->cfg_phy_cnt
);
3606 len
= le16_to_cpu(rx_start
->byte_count
);
3608 rx_end
= (__le32
*) ((u8
*) & pkt
->u
.raw
[0] +
3609 sizeof(struct iwl4965_rx_phy_res
) +
3610 rx_start
->cfg_phy_cnt
+ len
);
3613 struct iwl4965_rx_mpdu_res_start
*amsdu
=
3614 (struct iwl4965_rx_mpdu_res_start
*)pkt
->u
.raw
;
3616 hdr
= (struct ieee80211_hdr
*)(pkt
->u
.raw
+
3617 sizeof(struct iwl4965_rx_mpdu_res_start
));
3618 len
= le16_to_cpu(amsdu
->byte_count
);
3619 rx_start
->byte_count
= amsdu
->byte_count
;
3620 rx_end
= (__le32
*) (((u8
*) hdr
) + len
);
3622 if (len
> IWL_RX_BUF_SIZE
|| len
< 16) {
3623 IWL_WARNING("byte count out of range [16,4K]"
3628 ampdu_status
= le32_to_cpu(*rx_end
);
3629 skblen
= ((u8
*) rx_end
- (u8
*) & pkt
->u
.raw
[0]) + sizeof(u32
);
3631 /* start from MAC */
3632 skb_reserve(rxb
->skb
, (void *)hdr
- (void *)pkt
);
3633 skb_put(rxb
->skb
, len
); /* end where data ends */
3635 /* We only process data packets if the interface is open */
3636 if (unlikely(!priv
->is_open
)) {
3637 IWL_DEBUG_DROP_LIMIT
3638 ("Dropping packet while interface is not open.\n");
3642 if (priv
->iw_mode
== IEEE80211_IF_TYPE_MNTR
) {
3643 if (iwl4965_param_hwcrypto
)
3644 iwl4965_set_decrypted_flag(priv
, rxb
->skb
,
3645 ampdu_status
, stats
);
3646 iwl4965_handle_data_packet_monitor(priv
, rxb
, hdr
, len
, stats
, 0);
3651 hdr
= (struct ieee80211_hdr
*)rxb
->skb
->data
;
3653 if (iwl4965_param_hwcrypto
)
3654 iwl4965_set_decrypted_flag(priv
, rxb
->skb
, ampdu_status
, stats
);
3656 ieee80211_rx_irqsafe(priv
->hw
, rxb
->skb
, stats
);
3657 priv
->alloc_rxb_skb
--;
3660 priv
->led_packets
+= len
;
3661 iwl4965_setup_activity_timer(priv
);
3665 /* Calc max signal level (dBm) among 3 possible receivers */
3666 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res
*rx_resp
)
3668 /* data from PHY/DSP regarding signal strength, etc.,
3669 * contents are always there, not configurable by host. */
3670 struct iwl4965_rx_non_cfg_phy
*ncphy
=
3671 (struct iwl4965_rx_non_cfg_phy
*)rx_resp
->non_cfg_phy
;
3672 u32 agc
= (le16_to_cpu(ncphy
->agc_info
) & IWL_AGC_DB_MASK
)
3675 u32 valid_antennae
=
3676 (le16_to_cpu(rx_resp
->phy_flags
) & RX_PHY_FLAGS_ANTENNAE_MASK
)
3677 >> RX_PHY_FLAGS_ANTENNAE_OFFSET
;
3681 /* Find max rssi among 3 possible receivers.
3682 * These values are measured by the digital signal processor (DSP).
3683 * They should stay fairly constant even as the signal strength varies,
3684 * if the radio's automatic gain control (AGC) is working right.
3685 * AGC value (see below) will provide the "interesting" info. */
3686 for (i
= 0; i
< 3; i
++)
3687 if (valid_antennae
& (1 << i
))
3688 max_rssi
= max(ncphy
->rssi_info
[i
<< 1], max_rssi
);
3690 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3691 ncphy
->rssi_info
[0], ncphy
->rssi_info
[2], ncphy
->rssi_info
[4],
3694 /* dBm = max_rssi dB - agc dB - constant.
3695 * Higher AGC (higher radio gain) means lower signal. */
3696 return (max_rssi
- agc
- IWL_RSSI_OFFSET
);
3699 #ifdef CONFIG_IWL4965_HT
3701 /* Parsed Information Elements */
3702 struct ieee802_11_elems
{
3712 u8 ht_cap_param_len
;
3714 u8 ht_extra_param_len
;
3717 static int parse_elems(u8
*start
, size_t len
, struct ieee802_11_elems
*elems
)
3723 memset(elems
, 0, sizeof(*elems
));
3736 case WLAN_EID_DS_PARAMS
:
3737 elems
->ds_params
= pos
;
3738 elems
->ds_params_len
= elen
;
3742 elems
->tim_len
= elen
;
3744 case WLAN_EID_IBSS_PARAMS
:
3745 elems
->ibss_params
= pos
;
3746 elems
->ibss_params_len
= elen
;
3748 case WLAN_EID_ERP_INFO
:
3749 elems
->erp_info
= pos
;
3750 elems
->erp_info_len
= elen
;
3752 case WLAN_EID_HT_CAPABILITY
:
3753 elems
->ht_cap_param
= pos
;
3754 elems
->ht_cap_param_len
= elen
;
3756 case WLAN_EID_HT_EXTRA_INFO
:
3757 elems
->ht_extra_param
= pos
;
3758 elems
->ht_extra_param_len
= elen
;
3771 #endif /* CONFIG_IWL4965_HT */
3773 static void iwl4965_sta_modify_ps_wake(struct iwl4965_priv
*priv
, int sta_id
)
3775 unsigned long flags
;
3777 spin_lock_irqsave(&priv
->sta_lock
, flags
);
3778 priv
->stations
[sta_id
].sta
.station_flags
&= ~STA_FLG_PWR_SAVE_MSK
;
3779 priv
->stations
[sta_id
].sta
.station_flags_msk
= STA_FLG_PWR_SAVE_MSK
;
3780 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= 0;
3781 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
3782 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
3784 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
3787 static void iwl4965_update_ps_mode(struct iwl4965_priv
*priv
, u16 ps_bit
, u8
*addr
)
3789 /* FIXME: need locking over ps_status ??? */
3790 u8 sta_id
= iwl4965_hw_find_station(priv
, addr
);
3792 if (sta_id
!= IWL_INVALID_STATION
) {
3793 u8 sta_awake
= priv
->stations
[sta_id
].
3794 ps_status
== STA_PS_STATUS_WAKE
;
3796 if (sta_awake
&& ps_bit
)
3797 priv
->stations
[sta_id
].ps_status
= STA_PS_STATUS_SLEEP
;
3798 else if (!sta_awake
&& !ps_bit
) {
3799 iwl4965_sta_modify_ps_wake(priv
, sta_id
);
3800 priv
->stations
[sta_id
].ps_status
= STA_PS_STATUS_WAKE
;
3805 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3807 /* Called for REPLY_4965_RX (legacy ABG frames), or
3808 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3809 static void iwl4965_rx_reply_rx(struct iwl4965_priv
*priv
,
3810 struct iwl4965_rx_mem_buffer
*rxb
)
3812 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
3813 /* Use phy data (Rx signal strength, etc.) contained within
3814 * this rx packet for legacy frames,
3815 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3816 int include_phy
= (pkt
->hdr
.cmd
== REPLY_4965_RX
);
3817 struct iwl4965_rx_phy_res
*rx_start
= (include_phy
) ?
3818 (struct iwl4965_rx_phy_res
*)&(pkt
->u
.raw
[0]) :
3819 (struct iwl4965_rx_phy_res
*)&priv
->last_phy_res
[1];
3821 unsigned int len
= 0;
3822 struct ieee80211_hdr
*header
;
3824 struct ieee80211_rx_status stats
= {
3825 .mactime
= le64_to_cpu(rx_start
->timestamp
),
3826 .channel
= le16_to_cpu(rx_start
->channel
),
3828 (rx_start
->phy_flags
& RX_RES_PHY_FLAGS_BAND_24_MSK
) ?
3829 MODE_IEEE80211G
: MODE_IEEE80211A
,
3831 .rate
= iwl4965_hw_get_rate(rx_start
->rate_n_flags
),
3833 #ifdef CONFIG_IWL4965_HT_AGG
3835 #endif /* CONFIG_IWL4965_HT_AGG */
3839 if ((unlikely(rx_start
->cfg_phy_cnt
> 20))) {
3841 ("dsp size out of range [0,20]: "
3842 "%d/n", rx_start
->cfg_phy_cnt
);
3846 if (priv
->last_phy_res
[0])
3847 rx_start
= (struct iwl4965_rx_phy_res
*)
3848 &priv
->last_phy_res
[1];
3854 IWL_ERROR("MPDU frame without a PHY data\n");
3859 header
= (struct ieee80211_hdr
*)((u8
*) & rx_start
[1]
3860 + rx_start
->cfg_phy_cnt
);
3862 len
= le16_to_cpu(rx_start
->byte_count
);
3863 rx_end
= (__le32
*) (pkt
->u
.raw
+ rx_start
->cfg_phy_cnt
+
3864 sizeof(struct iwl4965_rx_phy_res
) + len
);
3866 struct iwl4965_rx_mpdu_res_start
*amsdu
=
3867 (struct iwl4965_rx_mpdu_res_start
*)pkt
->u
.raw
;
3869 header
= (void *)(pkt
->u
.raw
+
3870 sizeof(struct iwl4965_rx_mpdu_res_start
));
3871 len
= le16_to_cpu(amsdu
->byte_count
);
3872 rx_end
= (__le32
*) (pkt
->u
.raw
+
3873 sizeof(struct iwl4965_rx_mpdu_res_start
) + len
);
3876 if (!(*rx_end
& RX_RES_STATUS_NO_CRC32_ERROR
) ||
3877 !(*rx_end
& RX_RES_STATUS_NO_RXE_OVERFLOW
)) {
3878 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3879 le32_to_cpu(*rx_end
));
3883 priv
->ucode_beacon_time
= le32_to_cpu(rx_start
->beacon_time_stamp
);
3885 stats
.freq
= ieee80211chan2mhz(stats
.channel
);
3887 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3888 stats
.ssi
= iwl4965_calc_rssi(rx_start
);
3890 /* Meaningful noise values are available only from beacon statistics,
3891 * which are gathered only when associated, and indicate noise
3892 * only for the associated network channel ...
3893 * Ignore these noise values while scanning (other channels) */
3894 if (iwl4965_is_associated(priv
) &&
3895 !test_bit(STATUS_SCANNING
, &priv
->status
)) {
3896 stats
.noise
= priv
->last_rx_noise
;
3897 stats
.signal
= iwl4965_calc_sig_qual(stats
.ssi
, stats
.noise
);
3899 stats
.noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3900 stats
.signal
= iwl4965_calc_sig_qual(stats
.ssi
, 0);
3903 /* Reset beacon noise level if not associated. */
3904 if (!iwl4965_is_associated(priv
))
3905 priv
->last_rx_noise
= IWL_NOISE_MEAS_NOT_AVAILABLE
;
3907 #ifdef CONFIG_IWL4965_DEBUG
3908 /* TODO: Parts of iwl4965_report_frame are broken for 4965 */
3909 if (iwl4965_debug_level
& (IWL_DL_RX
))
3910 /* Set "1" to report good data frames in groups of 100 */
3911 iwl4965_report_frame(priv
, pkt
, header
, 1);
3913 if (iwl4965_debug_level
& (IWL_DL_RX
| IWL_DL_STATS
))
3914 IWL_DEBUG_RX("Rssi %d, noise %d, qual %d, TSF %lu\n",
3915 stats
.ssi
, stats
.noise
, stats
.signal
,
3916 (long unsigned int)le64_to_cpu(rx_start
->timestamp
));
3919 network_packet
= iwl4965_is_network_packet(priv
, header
);
3920 if (network_packet
) {
3921 priv
->last_rx_rssi
= stats
.ssi
;
3922 priv
->last_beacon_time
= priv
->ucode_beacon_time
;
3923 priv
->last_tsf
= le64_to_cpu(rx_start
->timestamp
);
3926 fc
= le16_to_cpu(header
->frame_control
);
3927 switch (fc
& IEEE80211_FCTL_FTYPE
) {
3928 case IEEE80211_FTYPE_MGMT
:
3930 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
)
3931 iwl4965_update_ps_mode(priv
, fc
& IEEE80211_FCTL_PM
,
3933 switch (fc
& IEEE80211_FCTL_STYPE
) {
3934 case IEEE80211_STYPE_PROBE_RESP
:
3935 case IEEE80211_STYPE_BEACON
:
3936 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_STA
&&
3937 !compare_ether_addr(header
->addr2
, priv
->bssid
)) ||
3938 (priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
&&
3939 !compare_ether_addr(header
->addr3
, priv
->bssid
))) {
3940 struct ieee80211_mgmt
*mgmt
=
3941 (struct ieee80211_mgmt
*)header
;
3943 le64_to_cpu(mgmt
->u
.beacon
.timestamp
);
3945 priv
->timestamp0
= timestamp
& 0xFFFFFFFF;
3947 (timestamp
>> 32) & 0xFFFFFFFF;
3948 priv
->beacon_int
= le16_to_cpu(
3949 mgmt
->u
.beacon
.beacon_int
);
3950 if (priv
->call_post_assoc_from_beacon
&&
3951 (priv
->iw_mode
== IEEE80211_IF_TYPE_STA
)) {
3952 priv
->call_post_assoc_from_beacon
= 0;
3953 queue_work(priv
->workqueue
,
3954 &priv
->post_associate
.work
);
3959 case IEEE80211_STYPE_ACTION
:
3963 * TODO: There is no callback function from upper
3964 * stack to inform us when associated status. this
3965 * work around to sniff assoc_resp management frame
3966 * and finish the association process.
3968 case IEEE80211_STYPE_ASSOC_RESP
:
3969 case IEEE80211_STYPE_REASSOC_RESP
:
3970 if (network_packet
) {
3971 #ifdef CONFIG_IWL4965_HT
3973 struct ieee802_11_elems elems
;
3974 #endif /*CONFIG_IWL4965_HT */
3975 struct ieee80211_mgmt
*mgnt
=
3976 (struct ieee80211_mgmt
*)header
;
3978 /* We have just associated, give some
3979 * time for the 4-way handshake if
3980 * any. Don't start scan too early. */
3981 priv
->next_scan_jiffies
= jiffies
+
3982 IWL_DELAY_NEXT_SCAN_AFTER_ASSOC
;
3984 priv
->assoc_id
= (~((1 << 15) | (1 << 14))
3985 & le16_to_cpu(mgnt
->u
.assoc_resp
.aid
));
3986 priv
->assoc_capability
=
3988 mgnt
->u
.assoc_resp
.capab_info
);
3989 #ifdef CONFIG_IWL4965_HT
3990 pos
= mgnt
->u
.assoc_resp
.variable
;
3991 if (!parse_elems(pos
,
3992 len
- (pos
- (u8
*) mgnt
),
3994 if (elems
.ht_extra_param
&&
3998 #endif /*CONFIG_IWL4965_HT */
3999 /* assoc_id is 0 no association */
4000 if (!priv
->assoc_id
)
4002 if (priv
->beacon_int
)
4003 queue_work(priv
->workqueue
,
4004 &priv
->post_associate
.work
);
4006 priv
->call_post_assoc_from_beacon
= 1;
4011 case IEEE80211_STYPE_PROBE_REQ
:
4012 if ((priv
->iw_mode
== IEEE80211_IF_TYPE_IBSS
) &&
4013 !iwl4965_is_associated(priv
)) {
4014 DECLARE_MAC_BUF(mac1
);
4015 DECLARE_MAC_BUF(mac2
);
4016 DECLARE_MAC_BUF(mac3
);
4018 IWL_DEBUG_DROP("Dropping (non network): "
4020 print_mac(mac1
, header
->addr1
),
4021 print_mac(mac2
, header
->addr2
),
4022 print_mac(mac3
, header
->addr3
));
4026 iwl4965_handle_data_packet(priv
, 0, include_phy
, rxb
, &stats
);
4029 case IEEE80211_FTYPE_CTL
:
4030 #ifdef CONFIG_IWL4965_HT_AGG
4031 switch (fc
& IEEE80211_FCTL_STYPE
) {
4032 case IEEE80211_STYPE_BACK_REQ
:
4033 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4034 iwl4965_handle_data_packet(priv
, 0, include_phy
,
4044 case IEEE80211_FTYPE_DATA
: {
4045 DECLARE_MAC_BUF(mac1
);
4046 DECLARE_MAC_BUF(mac2
);
4047 DECLARE_MAC_BUF(mac3
);
4049 if (priv
->iw_mode
== IEEE80211_IF_TYPE_AP
)
4050 iwl4965_update_ps_mode(priv
, fc
& IEEE80211_FCTL_PM
,
4053 if (unlikely(!network_packet
))
4054 IWL_DEBUG_DROP("Dropping (non network): "
4056 print_mac(mac1
, header
->addr1
),
4057 print_mac(mac2
, header
->addr2
),
4058 print_mac(mac3
, header
->addr3
));
4059 else if (unlikely(iwl4965_is_duplicate_packet(priv
, header
)))
4060 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4061 print_mac(mac1
, header
->addr1
),
4062 print_mac(mac2
, header
->addr2
),
4063 print_mac(mac3
, header
->addr3
));
4065 iwl4965_handle_data_packet(priv
, 1, include_phy
, rxb
,
4075 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4076 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4077 static void iwl4965_rx_reply_rx_phy(struct iwl4965_priv
*priv
,
4078 struct iwl4965_rx_mem_buffer
*rxb
)
4080 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
4081 priv
->last_phy_res
[0] = 1;
4082 memcpy(&priv
->last_phy_res
[1], &(pkt
->u
.raw
[0]),
4083 sizeof(struct iwl4965_rx_phy_res
));
4086 static void iwl4965_rx_missed_beacon_notif(struct iwl4965_priv
*priv
,
4087 struct iwl4965_rx_mem_buffer
*rxb
)
4090 #ifdef CONFIG_IWL4965_SENSITIVITY
4091 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
4092 struct iwl4965_missed_beacon_notif
*missed_beacon
;
4094 missed_beacon
= &pkt
->u
.missed_beacon
;
4095 if (le32_to_cpu(missed_beacon
->consequtive_missed_beacons
) > 5) {
4096 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4097 le32_to_cpu(missed_beacon
->consequtive_missed_beacons
),
4098 le32_to_cpu(missed_beacon
->total_missed_becons
),
4099 le32_to_cpu(missed_beacon
->num_recvd_beacons
),
4100 le32_to_cpu(missed_beacon
->num_expected_beacons
));
4101 priv
->sensitivity_data
.state
= IWL_SENS_CALIB_NEED_REINIT
;
4102 if (unlikely(!test_bit(STATUS_SCANNING
, &priv
->status
)))
4103 queue_work(priv
->workqueue
, &priv
->sensitivity_work
);
4105 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4108 #ifdef CONFIG_IWL4965_HT
4109 #ifdef CONFIG_IWL4965_HT_AGG
4112 * iwl4965_set_tx_status - Update driver's record of one Tx frame's status
4114 * This will get sent to mac80211.
4116 static void iwl4965_set_tx_status(struct iwl4965_priv
*priv
, int txq_id
, int idx
,
4117 u32 status
, u32 retry_count
, u32 rate
)
4119 struct ieee80211_tx_status
*tx_status
=
4120 &(priv
->txq
[txq_id
].txb
[idx
].status
);
4122 tx_status
->flags
= status
? IEEE80211_TX_STATUS_ACK
: 0;
4123 tx_status
->retry_count
+= retry_count
;
4124 tx_status
->control
.tx_rate
= rate
;
4129 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4131 static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv
*priv
,
4132 int sta_id
, int tid
)
4134 unsigned long flags
;
4136 /* Remove "disable" flag, to enable Tx for this TID */
4137 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4138 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_TID_DISABLE_TX
;
4139 priv
->stations
[sta_id
].sta
.tid_disable_tx
&= cpu_to_le16(~(1 << tid
));
4140 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
4141 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4143 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
4148 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4150 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4151 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4153 static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv
*priv
,
4154 struct iwl4965_ht_agg
*agg
,
4155 struct iwl4965_compressed_ba_resp
*
4160 u16 ba_seq_ctl
= le16_to_cpu(ba_resp
->ba_seq_ctl
);
4161 u32 bitmap0
, bitmap1
;
4162 u32 resp_bitmap0
= le32_to_cpu(ba_resp
->ba_bitmap0
);
4163 u32 resp_bitmap1
= le32_to_cpu(ba_resp
->ba_bitmap1
);
4165 if (unlikely(!agg
->wait_for_ba
)) {
4166 IWL_ERROR("Received BA when not expected\n");
4170 /* Mark that the expected block-ack response arrived */
4171 agg
->wait_for_ba
= 0;
4172 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg
->start_idx
, ba_resp
->ba_seq_ctl
);
4174 /* Calculate shift to align block-ack bits with our Tx window bits */
4175 sh
= agg
->start_idx
- SEQ_TO_INDEX(ba_seq_ctl
>>4);
4176 if (sh
< 0) /* tbw something is wrong with indices */
4179 /* don't use 64-bit values for now */
4180 bitmap0
= resp_bitmap0
>> sh
;
4181 bitmap1
= resp_bitmap1
>> sh
;
4182 bitmap0
|= (resp_bitmap1
& ((1<<sh
)|((1<<sh
)-1))) << (32 - sh
);
4184 if (agg
->frame_count
> (64 - sh
)) {
4185 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4189 /* check for success or failure according to the
4190 * transmitted bitmap and block-ack bitmap */
4191 bitmap0
&= agg
->bitmap0
;
4192 bitmap1
&= agg
->bitmap1
;
4194 /* For each frame attempted in aggregation,
4195 * update driver's record of tx frame's status. */
4196 for (i
= 0; i
< agg
->frame_count
; i
++) {
4197 int idx
= (agg
->start_idx
+ i
) & 0xff;
4198 ack
= bitmap0
& (1 << i
);
4199 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4200 ack
? "ACK":"NACK", i
, idx
, agg
->start_idx
+ i
);
4201 iwl4965_set_tx_status(priv
, agg
->txq_id
, idx
, ack
, 0,
4206 IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0
, bitmap1
);
4212 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4213 * @index -- current index
4214 * @n_bd -- total number of entries in queue (s/b power of 2)
4216 static inline int iwl4965_queue_dec_wrap(int index
, int n_bd
)
4218 return (index
== 0) ? n_bd
- 1 : index
- 1;
4222 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4224 * Handles block-acknowledge notification from device, which reports success
4225 * of frames sent via aggregation.
4227 static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv
*priv
,
4228 struct iwl4965_rx_mem_buffer
*rxb
)
4230 struct iwl4965_rx_packet
*pkt
= (void *)rxb
->skb
->data
;
4231 struct iwl4965_compressed_ba_resp
*ba_resp
= &pkt
->u
.compressed_ba
;
4233 struct iwl4965_tx_queue
*txq
= NULL
;
4234 struct iwl4965_ht_agg
*agg
;
4236 /* "flow" corresponds to Tx queue */
4237 u16 ba_resp_scd_flow
= le16_to_cpu(ba_resp
->scd_flow
);
4239 /* "ssn" is start of block-ack Tx window, corresponds to index
4240 * (in Tx queue's circular buffer) of first TFD/frame in window */
4241 u16 ba_resp_scd_ssn
= le16_to_cpu(ba_resp
->scd_ssn
);
4243 if (ba_resp_scd_flow
>= ARRAY_SIZE(priv
->txq
)) {
4244 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4248 txq
= &priv
->txq
[ba_resp_scd_flow
];
4249 agg
= &priv
->stations
[ba_resp
->sta_id
].tid
[ba_resp
->tid
].agg
;
4251 /* Find index just before block-ack window */
4252 index
= iwl4965_queue_dec_wrap(ba_resp_scd_ssn
& 0xff, txq
->q
.n_bd
);
4254 /* TODO: Need to get this copy more safely - now good for debug */
4257 DECLARE_MAC_BUF(mac);
4258 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4261 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4263 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
4264 "%d, scd_ssn = %d\n",
4266 ba_resp->ba_seq_ctl,
4267 ba_resp->ba_bitmap1,
4268 ba_resp->ba_bitmap0,
4271 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
4278 /* Update driver's record of ACK vs. not for each frame in window */
4279 iwl4965_tx_status_reply_compressed_ba(priv
, agg
, ba_resp
);
4281 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4282 * block-ack window (we assume that they've been successfully
4283 * transmitted ... if not, it's too late anyway). */
4284 if (txq
->q
.read_ptr
!= (ba_resp_scd_ssn
& 0xff))
4285 iwl4965_tx_queue_reclaim(priv
, ba_resp_scd_flow
, index
);
4291 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4293 static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv
*priv
, u16 txq_id
)
4295 /* Simply stop the queue, but don't change any configuration;
4296 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4297 iwl4965_write_prph(priv
,
4298 KDR_SCD_QUEUE_STATUS_BITS(txq_id
),
4299 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE
)|
4300 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN
));
4304 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4306 static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv
*priv
, u16 ra_tid
,
4313 scd_q2ratid
= ra_tid
& SCD_QUEUE_RA_TID_MAP_RATID_MSK
;
4315 tbl_dw_addr
= priv
->scd_base_addr
+
4316 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id
);
4318 tbl_dw
= iwl4965_read_targ_mem(priv
, tbl_dw_addr
);
4321 tbl_dw
= (scd_q2ratid
<< 16) | (tbl_dw
& 0x0000FFFF);
4323 tbl_dw
= scd_q2ratid
| (tbl_dw
& 0xFFFF0000);
4325 iwl4965_write_targ_mem(priv
, tbl_dw_addr
, tbl_dw
);
4331 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4333 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4334 * i.e. it must be one of the higher queues used for aggregation
4336 static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv
*priv
, int txq_id
,
4337 int tx_fifo
, int sta_id
, int tid
,
4340 unsigned long flags
;
4344 if (IWL_BACK_QUEUE_FIRST_ID
> txq_id
)
4345 IWL_WARNING("queue number too small: %d, must be > %d\n",
4346 txq_id
, IWL_BACK_QUEUE_FIRST_ID
);
4348 ra_tid
= BUILD_RAxTID(sta_id
, tid
);
4350 /* Modify device's station table to Tx this TID */
4351 iwl4965_sta_modify_enable_tid_tx(priv
, sta_id
, tid
);
4353 spin_lock_irqsave(&priv
->lock
, flags
);
4354 rc
= iwl4965_grab_nic_access(priv
);
4356 spin_unlock_irqrestore(&priv
->lock
, flags
);
4360 /* Stop this Tx queue before configuring it */
4361 iwl4965_tx_queue_stop_scheduler(priv
, txq_id
);
4363 /* Map receiver-address / traffic-ID to this queue */
4364 iwl4965_tx_queue_set_q2ratid(priv
, ra_tid
, txq_id
);
4366 /* Set this queue as a chain-building queue */
4367 iwl4965_set_bits_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, (1<<txq_id
));
4369 /* Place first TFD at index corresponding to start sequence number.
4370 * Assumes that ssn_idx is valid (!= 0xFFF) */
4371 priv
->txq
[txq_id
].q
.read_ptr
= (ssn_idx
& 0xff);
4372 priv
->txq
[txq_id
].q
.write_ptr
= (ssn_idx
& 0xff);
4373 iwl4965_set_wr_ptrs(priv
, txq_id
, ssn_idx
);
4375 /* Set up Tx window size and frame limit for this queue */
4376 iwl4965_write_targ_mem(priv
,
4377 priv
->scd_base_addr
+ SCD_CONTEXT_QUEUE_OFFSET(txq_id
),
4378 (SCD_WIN_SIZE
<< SCD_QUEUE_CTX_REG1_WIN_SIZE_POS
) &
4379 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK
);
4381 iwl4965_write_targ_mem(priv
, priv
->scd_base_addr
+
4382 SCD_CONTEXT_QUEUE_OFFSET(txq_id
) + sizeof(u32
),
4383 (SCD_FRAME_LIMIT
<< SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS
)
4384 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK
);
4386 iwl4965_set_bits_prph(priv
, KDR_SCD_INTERRUPT_MASK
, (1 << txq_id
));
4388 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4389 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[txq_id
], tx_fifo
, 1);
4391 iwl4965_release_nic_access(priv
);
4392 spin_unlock_irqrestore(&priv
->lock
, flags
);
4398 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4400 static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv
*priv
, u16 txq_id
,
4401 u16 ssn_idx
, u8 tx_fifo
)
4403 unsigned long flags
;
4406 if (IWL_BACK_QUEUE_FIRST_ID
> txq_id
) {
4407 IWL_WARNING("queue number too small: %d, must be > %d\n",
4408 txq_id
, IWL_BACK_QUEUE_FIRST_ID
);
4412 spin_lock_irqsave(&priv
->lock
, flags
);
4413 rc
= iwl4965_grab_nic_access(priv
);
4415 spin_unlock_irqrestore(&priv
->lock
, flags
);
4419 iwl4965_tx_queue_stop_scheduler(priv
, txq_id
);
4421 iwl4965_clear_bits_prph(priv
, KDR_SCD_QUEUECHAIN_SEL
, (1 << txq_id
));
4423 priv
->txq
[txq_id
].q
.read_ptr
= (ssn_idx
& 0xff);
4424 priv
->txq
[txq_id
].q
.write_ptr
= (ssn_idx
& 0xff);
4425 /* supposes that ssn_idx is valid (!= 0xFFF) */
4426 iwl4965_set_wr_ptrs(priv
, txq_id
, ssn_idx
);
4428 iwl4965_clear_bits_prph(priv
, KDR_SCD_INTERRUPT_MASK
, (1 << txq_id
));
4429 iwl4965_txq_ctx_deactivate(priv
, txq_id
);
4430 iwl4965_tx_queue_set_status(priv
, &priv
->txq
[txq_id
], tx_fifo
, 0);
4432 iwl4965_release_nic_access(priv
);
4433 spin_unlock_irqrestore(&priv
->lock
, flags
);
4438 #endif/* CONFIG_IWL4965_HT_AGG */
4439 #endif /* CONFIG_IWL4965_HT */
4442 * iwl4965_add_station - Initialize a station's hardware rate table
4444 * The uCode's station table contains a table of fallback rates
4445 * for automatic fallback during transmission.
4447 * NOTE: This sets up a default set of values. These will be replaced later
4448 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4451 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4452 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4453 * which requires station table entry to exist).
4455 void iwl4965_add_station(struct iwl4965_priv
*priv
, const u8
*addr
, int is_ap
)
4458 struct iwl4965_link_quality_cmd link_cmd
= {
4463 /* Set up the rate scaling to start at selected rate, fall back
4464 * all the way down to 1M in IEEE order, and then spin on 1M */
4466 r
= IWL_RATE_54M_INDEX
;
4467 else if (priv
->phymode
== MODE_IEEE80211A
)
4468 r
= IWL_RATE_6M_INDEX
;
4470 r
= IWL_RATE_1M_INDEX
;
4472 for (i
= 0; i
< LINK_QUAL_MAX_RETRY_NUM
; i
++) {
4474 if (r
>= IWL_FIRST_CCK_RATE
&& r
<= IWL_LAST_CCK_RATE
)
4475 rate_flags
|= RATE_MCS_CCK_MSK
;
4477 /* Use Tx antenna B only */
4478 rate_flags
|= RATE_MCS_ANT_B_MSK
;
4479 rate_flags
&= ~RATE_MCS_ANT_A_MSK
;
4481 link_cmd
.rs_table
[i
].rate_n_flags
=
4482 iwl4965_hw_set_rate_n_flags(iwl4965_rates
[r
].plcp
, rate_flags
);
4483 r
= iwl4965_get_prev_ieee_rate(r
);
4486 link_cmd
.general_params
.single_stream_ant_msk
= 2;
4487 link_cmd
.general_params
.dual_stream_ant_msk
= 3;
4488 link_cmd
.agg_params
.agg_dis_start_th
= 3;
4489 link_cmd
.agg_params
.agg_time_limit
= cpu_to_le16(4000);
4491 /* Update the rate scaling for control frame Tx to AP */
4492 link_cmd
.sta_id
= is_ap
? IWL_AP_ID
: IWL4965_BROADCAST_ID
;
4494 iwl4965_send_cmd_pdu(priv
, REPLY_TX_LINK_QUALITY_CMD
, sizeof(link_cmd
),
4498 #ifdef CONFIG_IWL4965_HT
4500 static u8
iwl4965_is_channel_extension(struct iwl4965_priv
*priv
, int phymode
,
4501 u16 channel
, u8 extension_chan_offset
)
4503 const struct iwl4965_channel_info
*ch_info
;
4505 ch_info
= iwl4965_get_channel_info(priv
, phymode
, channel
);
4506 if (!is_channel_valid(ch_info
))
4509 if (extension_chan_offset
== IWL_EXT_CHANNEL_OFFSET_AUTO
)
4512 if ((ch_info
->fat_extension_channel
== extension_chan_offset
) ||
4513 (ch_info
->fat_extension_channel
== HT_IE_EXT_CHANNEL_MAX
))
4519 static u8
iwl4965_is_fat_tx_allowed(struct iwl4965_priv
*priv
,
4520 const struct sta_ht_info
*ht_info
)
4523 if (priv
->channel_width
!= IWL_CHANNEL_WIDTH_40MHZ
)
4526 if (ht_info
->supported_chan_width
!= IWL_CHANNEL_WIDTH_40MHZ
)
4529 if (ht_info
->extension_chan_offset
== IWL_EXT_CHANNEL_OFFSET_AUTO
)
4532 /* no fat tx allowed on 2.4GHZ */
4533 if (priv
->phymode
!= MODE_IEEE80211A
)
4535 return (iwl4965_is_channel_extension(priv
, priv
->phymode
,
4536 ht_info
->control_channel
,
4537 ht_info
->extension_chan_offset
));
4540 void iwl4965_set_rxon_ht(struct iwl4965_priv
*priv
, struct sta_ht_info
*ht_info
)
4542 struct iwl4965_rxon_cmd
*rxon
= &priv
->staging_rxon
;
4545 if (!ht_info
->is_ht
)
4548 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4549 if (iwl4965_is_fat_tx_allowed(priv
, ht_info
))
4550 rxon
->flags
|= RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4552 rxon
->flags
&= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK
|
4553 RXON_FLG_CHANNEL_MODE_PURE_40_MSK
);
4555 if (le16_to_cpu(rxon
->channel
) != ht_info
->control_channel
) {
4556 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4557 le16_to_cpu(rxon
->channel
),
4558 ht_info
->control_channel
);
4559 rxon
->channel
= cpu_to_le16(ht_info
->control_channel
);
4563 /* Note: control channel is opposite of extension channel */
4564 switch (ht_info
->extension_chan_offset
) {
4565 case IWL_EXT_CHANNEL_OFFSET_ABOVE
:
4566 rxon
->flags
&= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
);
4568 case IWL_EXT_CHANNEL_OFFSET_BELOW
:
4569 rxon
->flags
|= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK
;
4571 case IWL_EXT_CHANNEL_OFFSET_AUTO
:
4572 rxon
->flags
&= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4575 rxon
->flags
&= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK
;
4579 val
= ht_info
->operating_mode
;
4581 rxon
->flags
|= cpu_to_le32(val
<< RXON_FLG_HT_OPERATING_MODE_POS
);
4583 priv
->active_rate_ht
[0] = ht_info
->supp_rates
[0];
4584 priv
->active_rate_ht
[1] = ht_info
->supp_rates
[1];
4585 iwl4965_set_rxon_chain(priv
);
4587 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4588 "rxon flags 0x%X operation mode :0x%X "
4589 "extension channel offset 0x%x "
4590 "control chan %d\n",
4591 priv
->active_rate_ht
[0], priv
->active_rate_ht
[1],
4592 le32_to_cpu(rxon
->flags
), ht_info
->operating_mode
,
4593 ht_info
->extension_chan_offset
,
4594 ht_info
->control_channel
);
4598 void iwl4965_set_ht_add_station(struct iwl4965_priv
*priv
, u8 index
)
4601 struct sta_ht_info
*ht_info
= &priv
->current_assoc_ht
;
4603 priv
->current_channel_width
= IWL_CHANNEL_WIDTH_20MHZ
;
4604 if (!ht_info
->is_ht
)
4607 sta_flags
= priv
->stations
[index
].sta
.station_flags
;
4609 if (ht_info
->tx_mimo_ps_mode
== IWL_MIMO_PS_DYNAMIC
)
4610 sta_flags
|= STA_FLG_RTS_MIMO_PROT_MSK
;
4612 sta_flags
&= ~STA_FLG_RTS_MIMO_PROT_MSK
;
4614 sta_flags
|= cpu_to_le32(
4615 (u32
)ht_info
->ampdu_factor
<< STA_FLG_MAX_AGG_SIZE_POS
);
4617 sta_flags
|= cpu_to_le32(
4618 (u32
)ht_info
->mpdu_density
<< STA_FLG_AGG_MPDU_DENSITY_POS
);
4620 sta_flags
&= (~STA_FLG_FAT_EN_MSK
);
4621 ht_info
->tx_chan_width
= IWL_CHANNEL_WIDTH_20MHZ
;
4622 ht_info
->chan_width_cap
= IWL_CHANNEL_WIDTH_20MHZ
;
4624 if (iwl4965_is_fat_tx_allowed(priv
, ht_info
)) {
4625 sta_flags
|= STA_FLG_FAT_EN_MSK
;
4626 ht_info
->chan_width_cap
= IWL_CHANNEL_WIDTH_40MHZ
;
4627 if (ht_info
->supported_chan_width
== IWL_CHANNEL_WIDTH_40MHZ
)
4628 ht_info
->tx_chan_width
= IWL_CHANNEL_WIDTH_40MHZ
;
4630 priv
->current_channel_width
= ht_info
->tx_chan_width
;
4631 priv
->stations
[index
].sta
.station_flags
= sta_flags
;
4636 #ifdef CONFIG_IWL4965_HT_AGG
4638 static void iwl4965_sta_modify_add_ba_tid(struct iwl4965_priv
*priv
,
4639 int sta_id
, int tid
, u16 ssn
)
4641 unsigned long flags
;
4643 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4644 priv
->stations
[sta_id
].sta
.station_flags_msk
= 0;
4645 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_ADDBA_TID_MSK
;
4646 priv
->stations
[sta_id
].sta
.add_immediate_ba_tid
= (u8
)tid
;
4647 priv
->stations
[sta_id
].sta
.add_immediate_ba_ssn
= cpu_to_le16(ssn
);
4648 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
4649 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4651 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
4654 static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv
*priv
,
4655 int sta_id
, int tid
)
4657 unsigned long flags
;
4659 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4660 priv
->stations
[sta_id
].sta
.station_flags_msk
= 0;
4661 priv
->stations
[sta_id
].sta
.sta
.modify_mask
= STA_MODIFY_DELBA_TID_MSK
;
4662 priv
->stations
[sta_id
].sta
.remove_immediate_ba_tid
= (u8
)tid
;
4663 priv
->stations
[sta_id
].sta
.mode
= STA_CONTROL_MODIFY_MSK
;
4664 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4666 iwl4965_send_add_station(priv
, &priv
->stations
[sta_id
].sta
, CMD_ASYNC
);
4669 static const u16 default_tid_to_tx_fifo
[] = {
4690 * Find first available (lowest unused) Tx Queue, mark it "active".
4691 * Called only when finding queue for aggregation.
4692 * Should never return anything < 7, because they should already
4693 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4695 static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv
*priv
)
4699 for (txq_id
= 0; txq_id
< priv
->hw_setting
.max_txq_num
; txq_id
++)
4700 if (!test_and_set_bit(txq_id
, &priv
->txq_ctx_active_msk
))
4705 int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw
*hw
, u8
*da
, u16 tid
,
4709 struct iwl4965_priv
*priv
= hw
->priv
;
4714 unsigned long flags
;
4715 struct iwl4965_tid_data
*tid_data
;
4716 DECLARE_MAC_BUF(mac
);
4718 /* Determine Tx DMA/FIFO channel for this Traffic ID */
4719 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
4720 tx_fifo
= default_tid_to_tx_fifo
[tid
];
4724 IWL_WARNING("iwl-AGG iwl4965_mac_ht_tx_agg_start on da=%s"
4725 " tid=%d\n", print_mac(mac
, da
), tid
);
4727 /* Get index into station table */
4728 sta_id
= iwl4965_hw_find_station(priv
, da
);
4729 if (sta_id
== IWL_INVALID_STATION
)
4732 /* Find available Tx queue for aggregation */
4733 txq_id
= iwl4965_txq_ctx_activate_free(priv
);
4737 spin_lock_irqsave(&priv
->sta_lock
, flags
);
4738 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
4740 /* Get starting sequence number for 1st frame in block ack window.
4741 * We'll use least signif byte as 1st frame's index into Tx queue. */
4742 ssn
= SEQ_TO_SN(tid_data
->seq_number
);
4743 tid_data
->agg
.txq_id
= txq_id
;
4744 spin_unlock_irqrestore(&priv
->sta_lock
, flags
);
4746 *start_seq_num
= ssn
;
4748 /* Update driver's link quality manager */
4749 iwl4965_ba_status(priv
, tid
, BA_STATUS_ACTIVE
);
4751 /* Set up and enable aggregation for selected Tx queue and FIFO */
4752 return iwl4965_tx_queue_agg_enable(priv
, txq_id
, tx_fifo
,
4757 int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw
*hw
, u8
*da
, u16 tid
,
4761 struct iwl4965_priv
*priv
= hw
->priv
;
4762 int tx_fifo_id
, txq_id
, sta_id
, ssn
= -1;
4763 struct iwl4965_tid_data
*tid_data
;
4765 DECLARE_MAC_BUF(mac
);
4768 IWL_ERROR("%s: da = NULL\n", __func__
);
4772 if (likely(tid
< ARRAY_SIZE(default_tid_to_tx_fifo
)))
4773 tx_fifo_id
= default_tid_to_tx_fifo
[tid
];
4777 sta_id
= iwl4965_hw_find_station(priv
, da
);
4779 if (sta_id
== IWL_INVALID_STATION
)
4782 tid_data
= &priv
->stations
[sta_id
].tid
[tid
];
4783 ssn
= (tid_data
->seq_number
& IEEE80211_SCTL_SEQ
) >> 4;
4784 txq_id
= tid_data
->agg
.txq_id
;
4786 rc
= iwl4965_tx_queue_agg_disable(priv
, txq_id
, ssn
, tx_fifo_id
);
4787 /* FIXME: need more safe way to handle error condition */
4791 iwl4965_ba_status(priv
, tid
, BA_STATUS_INITIATOR_DELBA
);
4792 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4793 print_mac(mac
, da
), tid
);
4798 int iwl4965_mac_ht_rx_agg_start(struct ieee80211_hw
*hw
, u8
*da
,
4799 u16 tid
, u16 start_seq_num
)
4801 struct iwl4965_priv
*priv
= hw
->priv
;
4803 DECLARE_MAC_BUF(mac
);
4805 IWL_WARNING("iwl-AGG iwl4965_mac_ht_rx_agg_start on da=%s"
4806 " tid=%d\n", print_mac(mac
, da
), tid
);
4807 sta_id
= iwl4965_hw_find_station(priv
, da
);
4808 iwl4965_sta_modify_add_ba_tid(priv
, sta_id
, tid
, start_seq_num
);
4812 int iwl4965_mac_ht_rx_agg_stop(struct ieee80211_hw
*hw
, u8
*da
,
4813 u16 tid
, int generator
)
4815 struct iwl4965_priv
*priv
= hw
->priv
;
4817 DECLARE_MAC_BUF(mac
);
4819 IWL_WARNING("iwl-AGG iwl4965_mac_ht_rx_agg_stop on da=%s tid=%d\n",
4820 print_mac(mac
, da
), tid
);
4821 sta_id
= iwl4965_hw_find_station(priv
, da
);
4822 iwl4965_sta_modify_del_ba_tid(priv
, sta_id
, tid
);
4826 #endif /* CONFIG_IWL4965_HT_AGG */
4827 #endif /* CONFIG_IWL4965_HT */
4829 /* Set up 4965-specific Rx frame reply handlers */
4830 void iwl4965_hw_rx_handler_setup(struct iwl4965_priv
*priv
)
4832 /* Legacy Rx frames */
4833 priv
->rx_handlers
[REPLY_4965_RX
] = iwl4965_rx_reply_rx
;
4835 /* High-throughput (HT) Rx frames */
4836 priv
->rx_handlers
[REPLY_RX_PHY_CMD
] = iwl4965_rx_reply_rx_phy
;
4837 priv
->rx_handlers
[REPLY_RX_MPDU_CMD
] = iwl4965_rx_reply_rx
;
4839 priv
->rx_handlers
[MISSED_BEACONS_NOTIFICATION
] =
4840 iwl4965_rx_missed_beacon_notif
;
4842 #ifdef CONFIG_IWL4965_HT
4843 #ifdef CONFIG_IWL4965_HT_AGG
4844 priv
->rx_handlers
[REPLY_COMPRESSED_BA
] = iwl4965_rx_reply_compressed_ba
;
4845 #endif /* CONFIG_IWL4965_HT_AGG */
4846 #endif /* CONFIG_IWL4965_HT */
4849 void iwl4965_hw_setup_deferred_work(struct iwl4965_priv
*priv
)
4851 INIT_WORK(&priv
->txpower_work
, iwl4965_bg_txpower_work
);
4852 INIT_WORK(&priv
->statistics_work
, iwl4965_bg_statistics_work
);
4853 #ifdef CONFIG_IWL4965_SENSITIVITY
4854 INIT_WORK(&priv
->sensitivity_work
, iwl4965_bg_sensitivity_work
);
4856 #ifdef CONFIG_IWL4965_HT
4857 #ifdef CONFIG_IWL4965_HT_AGG
4858 INIT_WORK(&priv
->agg_work
, iwl4965_bg_agg_work
);
4859 #endif /* CONFIG_IWL4965_HT_AGG */
4860 #endif /* CONFIG_IWL4965_HT */
4861 init_timer(&priv
->statistics_periodic
);
4862 priv
->statistics_periodic
.data
= (unsigned long)priv
;
4863 priv
->statistics_periodic
.function
= iwl4965_bg_statistics_periodic
;
4866 void iwl4965_hw_cancel_deferred_work(struct iwl4965_priv
*priv
)
4868 del_timer_sync(&priv
->statistics_periodic
);
4870 cancel_delayed_work(&priv
->init_alive_start
);
4873 struct pci_device_id iwl4965_hw_card_ids
[] = {
4874 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x4229)},
4875 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x4230)},
4880 * The device's EEPROM semaphore prevents conflicts between driver and uCode
4881 * when accessing the EEPROM; each access is a series of pulses to/from the
4882 * EEPROM chip, not a single event, so even reads could conflict if they
4883 * weren't arbitrated by the semaphore.
4885 int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv
*priv
)
4890 for (count
= 0; count
< EEPROM_SEM_RETRY_LIMIT
; count
++) {
4891 /* Request semaphore */
4892 iwl4965_set_bit(priv
, CSR_HW_IF_CONFIG_REG
,
4893 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
4895 /* See if we got it */
4896 rc
= iwl4965_poll_bit(priv
, CSR_HW_IF_CONFIG_REG
,
4897 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
4898 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
,
4899 EEPROM_SEM_TIMEOUT
);
4901 IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
4910 inline void iwl4965_eeprom_release_semaphore(struct iwl4965_priv
*priv
)
4912 iwl4965_clear_bit(priv
, CSR_HW_IF_CONFIG_REG
,
4913 CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM
);
4917 MODULE_DEVICE_TABLE(pci
, iwl4965_hw_card_ids
);