1 /******************************************************************************
3 * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
21 * Contact Information:
22 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25 *****************************************************************************/
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/version.h>
30 #include <linux/init.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/delay.h>
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/wireless.h>
37 #include <net/mac80211.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
41 #include "iwl-eeprom.h"
45 #include "iwl-helpers.h"
47 /* module parameters */
48 static struct iwl_mod_params iwl4965_mod_params = {
49 .num_of_queues = IWL_MAX_NUM_QUEUES,
52 /* the rest are 0 by default */
55 static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
57 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
58 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
59 IWL_RATE_SISO_##s##M_PLCP, \
60 IWL_RATE_MIMO_##s##M_PLCP, \
61 IWL_RATE_##r##M_IEEE, \
62 IWL_RATE_##ip##M_INDEX, \
63 IWL_RATE_##in##M_INDEX, \
64 IWL_RATE_##rp##M_INDEX, \
65 IWL_RATE_##rn##M_INDEX, \
66 IWL_RATE_##pp##M_INDEX, \
67 IWL_RATE_##np##M_INDEX }
71 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
73 * If there isn't a valid next or previous rate then INV is used which
74 * maps to IWL_RATE_INVALID
77 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
78 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
79 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
80 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
81 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
82 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
83 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
84 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
85 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
86 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
87 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
88 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
89 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
90 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
93 #ifdef CONFIG_IWL4965_HT
95 static const u16 default_tid_to_tx_fifo[] = {
115 #endif /*CONFIG_IWL4965_HT */
117 /* check contents of special bootstrap uCode SRAM */
118 static int iwl4965_verify_bsm(struct iwl_priv *priv)
120 __le32 *image = priv->ucode_boot.v_addr;
121 u32 len = priv->ucode_boot.len;
125 IWL_DEBUG_INFO("Begin verify bsm\n");
127 /* verify BSM SRAM contents */
128 val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
129 for (reg = BSM_SRAM_LOWER_BOUND;
130 reg < BSM_SRAM_LOWER_BOUND + len;
131 reg += sizeof(u32), image++) {
132 val = iwl_read_prph(priv, reg);
133 if (val != le32_to_cpu(*image)) {
134 IWL_ERROR("BSM uCode verification failed at "
135 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
136 BSM_SRAM_LOWER_BOUND,
137 reg - BSM_SRAM_LOWER_BOUND, len,
138 val, le32_to_cpu(*image));
143 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
149 * iwl4965_load_bsm - Load bootstrap instructions
153 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
154 * in special SRAM that does not power down during RFKILL. When powering back
155 * up after power-saving sleeps (or during initial uCode load), the BSM loads
156 * the bootstrap program into the on-board processor, and starts it.
158 * The bootstrap program loads (via DMA) instructions and data for a new
159 * program from host DRAM locations indicated by the host driver in the
160 * BSM_DRAM_* registers. Once the new program is loaded, it starts
163 * When initializing the NIC, the host driver points the BSM to the
164 * "initialize" uCode image. This uCode sets up some internal data, then
165 * notifies host via "initialize alive" that it is complete.
167 * The host then replaces the BSM_DRAM_* pointer values to point to the
168 * normal runtime uCode instructions and a backup uCode data cache buffer
169 * (filled initially with starting data values for the on-board processor),
170 * then triggers the "initialize" uCode to load and launch the runtime uCode,
171 * which begins normal operation.
173 * When doing a power-save shutdown, runtime uCode saves data SRAM into
174 * the backup data cache in DRAM before SRAM is powered down.
176 * When powering back up, the BSM loads the bootstrap program. This reloads
177 * the runtime uCode instructions and the backup data cache into SRAM,
178 * and re-launches the runtime uCode from where it left off.
180 static int iwl4965_load_bsm(struct iwl_priv *priv)
182 __le32 *image = priv->ucode_boot.v_addr;
183 u32 len = priv->ucode_boot.len;
193 IWL_DEBUG_INFO("Begin load bsm\n");
195 /* make sure bootstrap program is no larger than BSM's SRAM size */
196 if (len > IWL_MAX_BSM_SIZE)
199 /* Tell bootstrap uCode where to find the "Initialize" uCode
200 * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
201 * NOTE: iwl4965_initialize_alive_start() will replace these values,
202 * after the "initialize" uCode has run, to point to
203 * runtime/protocol instructions and backup data cache. */
204 pinst = priv->ucode_init.p_addr >> 4;
205 pdata = priv->ucode_init_data.p_addr >> 4;
206 inst_len = priv->ucode_init.len;
207 data_len = priv->ucode_init_data.len;
209 ret = iwl_grab_nic_access(priv);
213 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
214 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
215 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
216 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
218 /* Fill BSM memory with bootstrap instructions */
219 for (reg_offset = BSM_SRAM_LOWER_BOUND;
220 reg_offset < BSM_SRAM_LOWER_BOUND + len;
221 reg_offset += sizeof(u32), image++)
222 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
224 ret = iwl4965_verify_bsm(priv);
226 iwl_release_nic_access(priv);
230 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
231 iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
232 iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
233 iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
235 /* Load bootstrap code into instruction SRAM now,
236 * to prepare to load "initialize" uCode */
237 iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
239 /* Wait for load of bootstrap uCode to finish */
240 for (i = 0; i < 100; i++) {
241 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
242 if (!(done & BSM_WR_CTRL_REG_BIT_START))
247 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
249 IWL_ERROR("BSM write did not complete!\n");
253 /* Enable future boot loads whenever power management unit triggers it
254 * (e.g. when powering back up after power-save shutdown) */
255 iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
257 iwl_release_nic_access(priv);
262 static int iwl4965_init_drv(struct iwl_priv *priv)
267 priv->antenna = (enum iwl4965_antenna)priv->cfg->mod_params->antenna;
268 priv->retry_rate = 1;
269 priv->ibss_beacon = NULL;
271 spin_lock_init(&priv->lock);
272 spin_lock_init(&priv->power_data.lock);
273 spin_lock_init(&priv->sta_lock);
274 spin_lock_init(&priv->hcmd_lock);
275 spin_lock_init(&priv->lq_mngr.lock);
277 priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
278 sizeof(struct iwl4965_shared),
281 if (!priv->shared_virt) {
286 memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
289 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
290 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
292 INIT_LIST_HEAD(&priv->free_frames);
294 mutex_init(&priv->mutex);
296 /* Clear the driver's (not device's) station table */
297 iwlcore_clear_stations_table(priv);
299 priv->data_retry_limit = -1;
300 priv->ieee_channels = NULL;
301 priv->ieee_rates = NULL;
302 priv->band = IEEE80211_BAND_2GHZ;
304 priv->iw_mode = IEEE80211_IF_TYPE_STA;
306 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
307 priv->valid_antenna = 0x7; /* assume all 3 connected */
308 priv->ps_mode = IWL_MIMO_PS_NONE;
310 /* Choose which receivers/antennas to use */
311 iwl4965_set_rxon_chain(priv);
313 iwlcore_reset_qos(priv);
315 priv->qos_data.qos_active = 0;
316 priv->qos_data.qos_cap.val = 0;
318 iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
320 priv->rates_mask = IWL_RATES_MASK;
321 /* If power management is turned on, default to AC mode */
322 priv->power_mode = IWL_POWER_AC;
323 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
325 ret = iwl_init_channel_map(priv);
327 IWL_ERROR("initializing regulatory failed: %d\n", ret);
331 ret = iwl4965_init_geos(priv);
333 IWL_ERROR("initializing geos failed: %d\n", ret);
334 goto err_free_channel_map;
337 ret = ieee80211_register_hw(priv->hw);
339 IWL_ERROR("Failed to register network device (error %d)\n",
344 priv->hw->conf.beacon_int = 100;
345 priv->mac80211_registered = 1;
350 iwl4965_free_geos(priv);
351 err_free_channel_map:
352 iwl_free_channel_map(priv);
357 static int is_fat_channel(__le32 rxon_flags)
359 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
360 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
363 static u8 is_single_stream(struct iwl_priv *priv)
365 #ifdef CONFIG_IWL4965_HT
366 if (!priv->current_ht_config.is_ht ||
367 (priv->current_ht_config.supp_mcs_set[1] == 0) ||
368 (priv->ps_mode == IWL_MIMO_PS_STATIC))
372 #endif /*CONFIG_IWL4965_HT */
376 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
380 /* 4965 HT rate format */
381 if (rate_n_flags & RATE_MCS_HT_MSK) {
382 idx = (rate_n_flags & 0xff);
384 if (idx >= IWL_RATE_MIMO_6M_PLCP)
385 idx = idx - IWL_RATE_MIMO_6M_PLCP;
387 idx += IWL_FIRST_OFDM_RATE;
388 /* skip 9M not supported in ht*/
389 if (idx >= IWL_RATE_9M_INDEX)
391 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
394 /* 4965 legacy rate format, search for match in table */
396 for (idx = 0; idx < ARRAY_SIZE(iwl4965_rates); idx++)
397 if (iwl4965_rates[idx].plcp == (rate_n_flags & 0xFF))
405 * translate ucode response to mac80211 tx status control values
407 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
408 struct ieee80211_tx_control *control)
412 control->antenna_sel_tx =
413 ((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
414 if (rate_n_flags & RATE_MCS_HT_MSK)
415 control->flags |= IEEE80211_TXCTL_OFDM_HT;
416 if (rate_n_flags & RATE_MCS_GF_MSK)
417 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
418 if (rate_n_flags & RATE_MCS_FAT_MSK)
419 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
420 if (rate_n_flags & RATE_MCS_DUP_MSK)
421 control->flags |= IEEE80211_TXCTL_DUP_DATA;
422 if (rate_n_flags & RATE_MCS_SGI_MSK)
423 control->flags |= IEEE80211_TXCTL_SHORT_GI;
424 /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
425 * IEEE80211_BAND_2GHZ band as it contains all the rates */
426 rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
427 if (rate_index == -1)
428 control->tx_rate = NULL;
431 &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
435 * Determine how many receiver/antenna chains to use.
436 * More provides better reception via diversity. Fewer saves power.
437 * MIMO (dual stream) requires at least 2, but works better with 3.
438 * This does not determine *which* chains to use, just how many.
440 static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
441 u8 *idle_state, u8 *rx_state)
443 u8 is_single = is_single_stream(priv);
444 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
446 /* # of Rx chains to use when expecting MIMO. */
447 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
452 /* # Rx chains when idling and maybe trying to save power */
453 switch (priv->ps_mode) {
454 case IWL_MIMO_PS_STATIC:
455 case IWL_MIMO_PS_DYNAMIC:
456 *idle_state = (is_cam) ? 2 : 1;
458 case IWL_MIMO_PS_NONE:
459 *idle_state = (is_cam) ? *rx_state : 1;
469 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
474 spin_lock_irqsave(&priv->lock, flags);
475 rc = iwl_grab_nic_access(priv);
477 spin_unlock_irqrestore(&priv->lock, flags);
482 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
483 rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
486 IWL_ERROR("Can't stop Rx DMA.\n");
488 iwl_release_nic_access(priv);
489 spin_unlock_irqrestore(&priv->lock, flags);
494 u8 iwl4965_hw_find_station(struct iwl_priv *priv, const u8 *addr)
498 int ret = IWL_INVALID_STATION;
500 DECLARE_MAC_BUF(mac);
502 if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) ||
503 (priv->iw_mode == IEEE80211_IF_TYPE_AP))
506 if (is_broadcast_ether_addr(addr))
507 return priv->hw_params.bcast_sta_id;
509 spin_lock_irqsave(&priv->sta_lock, flags);
510 for (i = start; i < priv->hw_params.max_stations; i++)
511 if ((priv->stations[i].used) &&
513 (priv->stations[i].sta.sta.addr, addr))) {
518 IWL_DEBUG_ASSOC_LIMIT("can not find STA %s total %d\n",
519 print_mac(mac, addr), priv->num_stations);
522 spin_unlock_irqrestore(&priv->sta_lock, flags);
526 static int iwl4965_nic_set_pwr_src(struct iwl_priv *priv, int pwr_max)
531 spin_lock_irqsave(&priv->lock, flags);
532 ret = iwl_grab_nic_access(priv);
534 spin_unlock_irqrestore(&priv->lock, flags);
541 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
544 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
545 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
546 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
547 ~APMG_PS_CTRL_MSK_PWR_SRC);
549 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
550 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
551 ~APMG_PS_CTRL_MSK_PWR_SRC);
553 iwl_release_nic_access(priv);
554 spin_unlock_irqrestore(&priv->lock, flags);
559 static int iwl4965_rx_init(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
563 unsigned int rb_size;
565 spin_lock_irqsave(&priv->lock, flags);
566 ret = iwl_grab_nic_access(priv);
568 spin_unlock_irqrestore(&priv->lock, flags);
572 if (priv->cfg->mod_params->amsdu_size_8K)
573 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K;
575 rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K;
578 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
580 /* Reset driver's Rx queue write index */
581 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0);
583 /* Tell device where to find RBD circular buffer in DRAM */
584 iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
587 /* Tell device where in DRAM to update its Rx status */
588 iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
590 offsetof(struct iwl4965_shared, rb_closed)) >> 4);
592 /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
593 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
594 FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
595 FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
598 (RX_QUEUE_SIZE_LOG <<
599 FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
602 * iwl_write32(priv,CSR_INT_COAL_REG,0);
605 iwl_release_nic_access(priv);
606 spin_unlock_irqrestore(&priv->lock, flags);
611 /* Tell 4965 where to find the "keep warm" buffer */
612 static int iwl4965_kw_init(struct iwl_priv *priv)
617 spin_lock_irqsave(&priv->lock, flags);
618 rc = iwl_grab_nic_access(priv);
622 iwl_write_direct32(priv, IWL_FH_KW_MEM_ADDR_REG,
623 priv->kw.dma_addr >> 4);
624 iwl_release_nic_access(priv);
626 spin_unlock_irqrestore(&priv->lock, flags);
630 static int iwl4965_kw_alloc(struct iwl_priv *priv)
632 struct pci_dev *dev = priv->pci_dev;
633 struct iwl4965_kw *kw = &priv->kw;
635 kw->size = IWL4965_KW_SIZE; /* TBW need set somewhere else */
636 kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
644 * iwl4965_kw_free - Free the "keep warm" buffer
646 static void iwl4965_kw_free(struct iwl_priv *priv)
648 struct pci_dev *dev = priv->pci_dev;
649 struct iwl4965_kw *kw = &priv->kw;
652 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
653 memset(kw, 0, sizeof(*kw));
658 * iwl4965_txq_ctx_reset - Reset TX queue context
659 * Destroys all DMA structures and initialise them again
664 static int iwl4965_txq_ctx_reset(struct iwl_priv *priv)
667 int txq_id, slots_num;
670 iwl4965_kw_free(priv);
672 /* Free all tx/cmd queues and keep-warm buffer */
673 iwl4965_hw_txq_ctx_free(priv);
675 /* Alloc keep-warm buffer */
676 rc = iwl4965_kw_alloc(priv);
678 IWL_ERROR("Keep Warm allocation failed");
682 spin_lock_irqsave(&priv->lock, flags);
684 rc = iwl_grab_nic_access(priv);
686 IWL_ERROR("TX reset failed");
687 spin_unlock_irqrestore(&priv->lock, flags);
691 /* Turn off all Tx DMA channels */
692 iwl_write_prph(priv, IWL49_SCD_TXFACT, 0);
693 iwl_release_nic_access(priv);
694 spin_unlock_irqrestore(&priv->lock, flags);
696 /* Tell 4965 where to find the keep-warm buffer */
697 rc = iwl4965_kw_init(priv);
699 IWL_ERROR("kw_init failed\n");
703 /* Alloc and init all (default 16) Tx queues,
704 * including the command queue (#4) */
705 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
706 slots_num = (txq_id == IWL_CMD_QUEUE_NUM) ?
707 TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
708 rc = iwl4965_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
711 IWL_ERROR("Tx %d queue init failed\n", txq_id);
719 iwl4965_hw_txq_ctx_free(priv);
721 iwl4965_kw_free(priv);
726 int iwl4965_hw_nic_init(struct iwl_priv *priv)
730 struct iwl4965_rx_queue *rxq = &priv->rxq;
735 iwl4965_power_init_handle(priv);
738 spin_lock_irqsave(&priv->lock, flags);
740 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
741 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
743 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
744 rc = iwl_poll_bit(priv, CSR_GP_CNTRL,
745 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
746 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
748 spin_unlock_irqrestore(&priv->lock, flags);
749 IWL_DEBUG_INFO("Failed to init the card\n");
753 rc = iwl_grab_nic_access(priv);
755 spin_unlock_irqrestore(&priv->lock, flags);
759 iwl_read_prph(priv, APMG_CLK_CTRL_REG);
761 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
762 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
763 iwl_read_prph(priv, APMG_CLK_CTRL_REG);
767 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
768 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
770 iwl_release_nic_access(priv);
771 iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
772 spin_unlock_irqrestore(&priv->lock, flags);
774 /* Determine HW type */
775 rc = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
779 IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
781 iwl4965_nic_set_pwr_src(priv, 1);
782 spin_lock_irqsave(&priv->lock, flags);
784 if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
785 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
786 /* Enable No Snoop field */
787 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
791 spin_unlock_irqrestore(&priv->lock, flags);
793 if (priv->eeprom.calib_version < EEPROM_TX_POWER_VERSION_NEW) {
794 IWL_ERROR("Older EEPROM detected! Aborting.\n");
798 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
800 /* disable L1 entry -- workaround for pre-B1 */
801 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
803 spin_lock_irqsave(&priv->lock, flags);
805 /* set CSR_HW_CONFIG_REG for uCode use */
807 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
808 CSR49_HW_IF_CONFIG_REG_BIT_4965_R |
809 CSR49_HW_IF_CONFIG_REG_BIT_RADIO_SI |
810 CSR49_HW_IF_CONFIG_REG_BIT_MAC_SI);
812 rc = iwl_grab_nic_access(priv);
814 spin_unlock_irqrestore(&priv->lock, flags);
815 IWL_DEBUG_INFO("Failed to init the card\n");
819 iwl_read_prph(priv, APMG_PS_CTRL_REG);
820 iwl_set_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
822 iwl_clear_bits_prph(priv, APMG_PS_CTRL_REG, APMG_PS_CTRL_VAL_RESET_REQ);
824 iwl_release_nic_access(priv);
825 spin_unlock_irqrestore(&priv->lock, flags);
827 iwl4965_hw_card_show_info(priv);
831 /* Allocate the RX queue, or reset if it is already allocated */
833 rc = iwl4965_rx_queue_alloc(priv);
835 IWL_ERROR("Unable to initialize Rx queue\n");
839 iwl4965_rx_queue_reset(priv, rxq);
841 iwl4965_rx_replenish(priv);
843 iwl4965_rx_init(priv, rxq);
845 spin_lock_irqsave(&priv->lock, flags);
847 rxq->need_update = 1;
848 iwl4965_rx_queue_update_write_ptr(priv, rxq);
850 spin_unlock_irqrestore(&priv->lock, flags);
852 /* Allocate and init all Tx and Command queues */
853 rc = iwl4965_txq_ctx_reset(priv);
857 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_SW_RF_KILL_ENABLE)
858 IWL_DEBUG_RF_KILL("SW RF KILL supported in EEPROM.\n");
860 if (priv->eeprom.sku_cap & EEPROM_SKU_CAP_HW_RF_KILL_ENABLE)
861 IWL_DEBUG_RF_KILL("HW RF KILL supported in EEPROM.\n");
863 set_bit(STATUS_INIT, &priv->status);
868 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
874 spin_lock_irqsave(&priv->lock, flags);
876 /* set stop master bit */
877 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
879 reg_val = iwl_read32(priv, CSR_GP_CNTRL);
881 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
882 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
883 IWL_DEBUG_INFO("Card in power save, master is already "
886 rc = iwl_poll_bit(priv, CSR_RESET,
887 CSR_RESET_REG_FLAG_MASTER_DISABLED,
888 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
890 spin_unlock_irqrestore(&priv->lock, flags);
895 spin_unlock_irqrestore(&priv->lock, flags);
896 IWL_DEBUG_INFO("stop master\n");
902 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
904 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
910 /* Stop each Tx DMA channel, and wait for it to be idle */
911 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
912 spin_lock_irqsave(&priv->lock, flags);
913 if (iwl_grab_nic_access(priv)) {
914 spin_unlock_irqrestore(&priv->lock, flags);
918 iwl_write_direct32(priv,
919 IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
920 iwl_poll_direct_bit(priv, IWL_FH_TSSR_TX_STATUS_REG,
921 IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
923 iwl_release_nic_access(priv);
924 spin_unlock_irqrestore(&priv->lock, flags);
927 /* Deallocate memory for all Tx queues */
928 iwl4965_hw_txq_ctx_free(priv);
931 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
936 iwl4965_hw_nic_stop_master(priv);
938 spin_lock_irqsave(&priv->lock, flags);
940 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
944 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
945 rc = iwl_poll_bit(priv, CSR_RESET,
946 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
947 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
951 rc = iwl_grab_nic_access(priv);
953 iwl_write_prph(priv, APMG_CLK_EN_REG,
954 APMG_CLK_VAL_DMA_CLK_RQT |
955 APMG_CLK_VAL_BSM_CLK_RQT);
959 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
960 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
962 iwl_release_nic_access(priv);
965 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
966 wake_up_interruptible(&priv->wait_command_queue);
968 spin_unlock_irqrestore(&priv->lock, flags);
974 #define REG_RECALIB_PERIOD (60)
977 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
979 * This callback is provided in order to send a statistics request.
981 * This timer function is continually reset to execute within
982 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
983 * was received. We need to ensure we receive the statistics in order
984 * to update the temperature used for calibrating the TXPOWER.
986 static void iwl4965_bg_statistics_periodic(unsigned long data)
988 struct iwl_priv *priv = (struct iwl_priv *)data;
990 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
993 iwl_send_statistics_request(priv, CMD_ASYNC);
996 #define CT_LIMIT_CONST 259
997 #define TM_CT_KILL_THRESHOLD 110
999 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
1001 struct iwl4965_ct_kill_config cmd;
1004 u32 crit_temperature;
1005 unsigned long flags;
1008 spin_lock_irqsave(&priv->lock, flags);
1009 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1010 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1011 spin_unlock_irqrestore(&priv->lock, flags);
1013 if (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK) {
1014 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1015 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1016 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1018 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1019 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1020 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1023 temp_th = CELSIUS_TO_KELVIN(TM_CT_KILL_THRESHOLD);
1025 crit_temperature = ((temp_th * (R3-R1))/CT_LIMIT_CONST) + R2;
1026 cmd.critical_temperature_R = cpu_to_le32(crit_temperature);
1027 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1030 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
1032 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded\n");
1035 #ifdef CONFIG_IWL4965_SENSITIVITY
1037 /* "false alarms" are signals that our DSP tries to lock onto,
1038 * but then determines that they are either noise, or transmissions
1039 * from a distant wireless network (also "noise", really) that get
1040 * "stepped on" by stronger transmissions within our own network.
1041 * This algorithm attempts to set a sensitivity level that is high
1042 * enough to receive all of our own network traffic, but not so
1043 * high that our DSP gets too busy trying to lock onto non-network
1044 * activity/noise. */
1045 static int iwl4965_sens_energy_cck(struct iwl_priv *priv,
1048 struct statistics_general_data *rx_info)
1050 u32 max_nrg_cck = 0;
1052 u8 max_silence_rssi = 0;
1053 u32 silence_ref = 0;
1054 u8 silence_rssi_a = 0;
1055 u8 silence_rssi_b = 0;
1056 u8 silence_rssi_c = 0;
1059 /* "false_alarms" values below are cross-multiplications to assess the
1060 * numbers of false alarms within the measured period of actual Rx
1061 * (Rx is off when we're txing), vs the min/max expected false alarms
1062 * (some should be expected if rx is sensitive enough) in a
1063 * hypothetical listening period of 200 time units (TU), 204.8 msec:
1065 * MIN_FA/fixed-time < false_alarms/actual-rx-time < MAX_FA/beacon-time
1068 u32 false_alarms = norm_fa * 200 * 1024;
1069 u32 max_false_alarms = MAX_FA_CCK * rx_enable_time;
1070 u32 min_false_alarms = MIN_FA_CCK * rx_enable_time;
1071 struct iwl4965_sensitivity_data *data = NULL;
1073 data = &(priv->sensitivity_data);
1075 data->nrg_auto_corr_silence_diff = 0;
1077 /* Find max silence rssi among all 3 receivers.
1078 * This is background noise, which may include transmissions from other
1079 * networks, measured during silence before our network's beacon */
1080 silence_rssi_a = (u8)((rx_info->beacon_silence_rssi_a &
1081 ALL_BAND_FILTER) >> 8);
1082 silence_rssi_b = (u8)((rx_info->beacon_silence_rssi_b &
1083 ALL_BAND_FILTER) >> 8);
1084 silence_rssi_c = (u8)((rx_info->beacon_silence_rssi_c &
1085 ALL_BAND_FILTER) >> 8);
1087 val = max(silence_rssi_b, silence_rssi_c);
1088 max_silence_rssi = max(silence_rssi_a, (u8) val);
1090 /* Store silence rssi in 20-beacon history table */
1091 data->nrg_silence_rssi[data->nrg_silence_idx] = max_silence_rssi;
1092 data->nrg_silence_idx++;
1093 if (data->nrg_silence_idx >= NRG_NUM_PREV_STAT_L)
1094 data->nrg_silence_idx = 0;
1096 /* Find max silence rssi across 20 beacon history */
1097 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++) {
1098 val = data->nrg_silence_rssi[i];
1099 silence_ref = max(silence_ref, val);
1101 IWL_DEBUG_CALIB("silence a %u, b %u, c %u, 20-bcn max %u\n",
1102 silence_rssi_a, silence_rssi_b, silence_rssi_c,
1105 /* Find max rx energy (min value!) among all 3 receivers,
1106 * measured during beacon frame.
1107 * Save it in 10-beacon history table. */
1108 i = data->nrg_energy_idx;
1109 val = min(rx_info->beacon_energy_b, rx_info->beacon_energy_c);
1110 data->nrg_value[i] = min(rx_info->beacon_energy_a, val);
1112 data->nrg_energy_idx++;
1113 if (data->nrg_energy_idx >= 10)
1114 data->nrg_energy_idx = 0;
1116 /* Find min rx energy (max value) across 10 beacon history.
1117 * This is the minimum signal level that we want to receive well.
1118 * Add backoff (margin so we don't miss slightly lower energy frames).
1119 * This establishes an upper bound (min value) for energy threshold. */
1120 max_nrg_cck = data->nrg_value[0];
1121 for (i = 1; i < 10; i++)
1122 max_nrg_cck = (u32) max(max_nrg_cck, (data->nrg_value[i]));
1125 IWL_DEBUG_CALIB("rx energy a %u, b %u, c %u, 10-bcn max/min %u\n",
1126 rx_info->beacon_energy_a, rx_info->beacon_energy_b,
1127 rx_info->beacon_energy_c, max_nrg_cck - 6);
1129 /* Count number of consecutive beacons with fewer-than-desired
1131 if (false_alarms < min_false_alarms)
1132 data->num_in_cck_no_fa++;
1134 data->num_in_cck_no_fa = 0;
1135 IWL_DEBUG_CALIB("consecutive bcns with few false alarms = %u\n",
1136 data->num_in_cck_no_fa);
1138 /* If we got too many false alarms this time, reduce sensitivity */
1139 if (false_alarms > max_false_alarms) {
1140 IWL_DEBUG_CALIB("norm FA %u > max FA %u\n",
1141 false_alarms, max_false_alarms);
1142 IWL_DEBUG_CALIB("... reducing sensitivity\n");
1143 data->nrg_curr_state = IWL_FA_TOO_MANY;
1145 if (data->auto_corr_cck > AUTO_CORR_MAX_TH_CCK) {
1146 /* Store for "fewer than desired" on later beacon */
1147 data->nrg_silence_ref = silence_ref;
1149 /* increase energy threshold (reduce nrg value)
1150 * to decrease sensitivity */
1151 if (data->nrg_th_cck > (NRG_MAX_CCK + NRG_STEP_CCK))
1152 data->nrg_th_cck = data->nrg_th_cck
1156 /* increase auto_corr values to decrease sensitivity */
1157 if (data->auto_corr_cck < AUTO_CORR_MAX_TH_CCK)
1158 data->auto_corr_cck = AUTO_CORR_MAX_TH_CCK + 1;
1160 val = data->auto_corr_cck + AUTO_CORR_STEP_CCK;
1161 data->auto_corr_cck = min((u32)AUTO_CORR_MAX_CCK, val);
1163 val = data->auto_corr_cck_mrc + AUTO_CORR_STEP_CCK;
1164 data->auto_corr_cck_mrc = min((u32)AUTO_CORR_MAX_CCK_MRC, val);
1166 /* Else if we got fewer than desired, increase sensitivity */
1167 } else if (false_alarms < min_false_alarms) {
1168 data->nrg_curr_state = IWL_FA_TOO_FEW;
1170 /* Compare silence level with silence level for most recent
1171 * healthy number or too many false alarms */
1172 data->nrg_auto_corr_silence_diff = (s32)data->nrg_silence_ref -
1175 IWL_DEBUG_CALIB("norm FA %u < min FA %u, silence diff %d\n",
1176 false_alarms, min_false_alarms,
1177 data->nrg_auto_corr_silence_diff);
1179 /* Increase value to increase sensitivity, but only if:
1180 * 1a) previous beacon did *not* have *too many* false alarms
1181 * 1b) AND there's a significant difference in Rx levels
1182 * from a previous beacon with too many, or healthy # FAs
1183 * OR 2) We've seen a lot of beacons (100) with too few
1185 if ((data->nrg_prev_state != IWL_FA_TOO_MANY) &&
1186 ((data->nrg_auto_corr_silence_diff > NRG_DIFF) ||
1187 (data->num_in_cck_no_fa > MAX_NUMBER_CCK_NO_FA))) {
1189 IWL_DEBUG_CALIB("... increasing sensitivity\n");
1190 /* Increase nrg value to increase sensitivity */
1191 val = data->nrg_th_cck + NRG_STEP_CCK;
1192 data->nrg_th_cck = min((u32)NRG_MIN_CCK, val);
1194 /* Decrease auto_corr values to increase sensitivity */
1195 val = data->auto_corr_cck - AUTO_CORR_STEP_CCK;
1196 data->auto_corr_cck = max((u32)AUTO_CORR_MIN_CCK, val);
1198 val = data->auto_corr_cck_mrc - AUTO_CORR_STEP_CCK;
1199 data->auto_corr_cck_mrc =
1200 max((u32)AUTO_CORR_MIN_CCK_MRC, val);
1203 IWL_DEBUG_CALIB("... but not changing sensitivity\n");
1205 /* Else we got a healthy number of false alarms, keep status quo */
1207 IWL_DEBUG_CALIB(" FA in safe zone\n");
1208 data->nrg_curr_state = IWL_FA_GOOD_RANGE;
1210 /* Store for use in "fewer than desired" with later beacon */
1211 data->nrg_silence_ref = silence_ref;
1213 /* If previous beacon had too many false alarms,
1214 * give it some extra margin by reducing sensitivity again
1215 * (but don't go below measured energy of desired Rx) */
1216 if (IWL_FA_TOO_MANY == data->nrg_prev_state) {
1217 IWL_DEBUG_CALIB("... increasing margin\n");
1218 data->nrg_th_cck -= NRG_MARGIN;
1222 /* Make sure the energy threshold does not go above the measured
1223 * energy of the desired Rx signals (reduced by backoff margin),
1224 * or else we might start missing Rx frames.
1225 * Lower value is higher energy, so we use max()!
1227 data->nrg_th_cck = max(max_nrg_cck, data->nrg_th_cck);
1228 IWL_DEBUG_CALIB("new nrg_th_cck %u\n", data->nrg_th_cck);
1230 data->nrg_prev_state = data->nrg_curr_state;
1236 static int iwl4965_sens_auto_corr_ofdm(struct iwl_priv *priv,
1241 u32 false_alarms = norm_fa * 200 * 1024;
1242 u32 max_false_alarms = MAX_FA_OFDM * rx_enable_time;
1243 u32 min_false_alarms = MIN_FA_OFDM * rx_enable_time;
1244 struct iwl4965_sensitivity_data *data = NULL;
1246 data = &(priv->sensitivity_data);
1248 /* If we got too many false alarms this time, reduce sensitivity */
1249 if (false_alarms > max_false_alarms) {
1251 IWL_DEBUG_CALIB("norm FA %u > max FA %u)\n",
1252 false_alarms, max_false_alarms);
1254 val = data->auto_corr_ofdm + AUTO_CORR_STEP_OFDM;
1255 data->auto_corr_ofdm =
1256 min((u32)AUTO_CORR_MAX_OFDM, val);
1258 val = data->auto_corr_ofdm_mrc + AUTO_CORR_STEP_OFDM;
1259 data->auto_corr_ofdm_mrc =
1260 min((u32)AUTO_CORR_MAX_OFDM_MRC, val);
1262 val = data->auto_corr_ofdm_x1 + AUTO_CORR_STEP_OFDM;
1263 data->auto_corr_ofdm_x1 =
1264 min((u32)AUTO_CORR_MAX_OFDM_X1, val);
1266 val = data->auto_corr_ofdm_mrc_x1 + AUTO_CORR_STEP_OFDM;
1267 data->auto_corr_ofdm_mrc_x1 =
1268 min((u32)AUTO_CORR_MAX_OFDM_MRC_X1, val);
1271 /* Else if we got fewer than desired, increase sensitivity */
1272 else if (false_alarms < min_false_alarms) {
1274 IWL_DEBUG_CALIB("norm FA %u < min FA %u\n",
1275 false_alarms, min_false_alarms);
1277 val = data->auto_corr_ofdm - AUTO_CORR_STEP_OFDM;
1278 data->auto_corr_ofdm =
1279 max((u32)AUTO_CORR_MIN_OFDM, val);
1281 val = data->auto_corr_ofdm_mrc - AUTO_CORR_STEP_OFDM;
1282 data->auto_corr_ofdm_mrc =
1283 max((u32)AUTO_CORR_MIN_OFDM_MRC, val);
1285 val = data->auto_corr_ofdm_x1 - AUTO_CORR_STEP_OFDM;
1286 data->auto_corr_ofdm_x1 =
1287 max((u32)AUTO_CORR_MIN_OFDM_X1, val);
1289 val = data->auto_corr_ofdm_mrc_x1 - AUTO_CORR_STEP_OFDM;
1290 data->auto_corr_ofdm_mrc_x1 =
1291 max((u32)AUTO_CORR_MIN_OFDM_MRC_X1, val);
1295 IWL_DEBUG_CALIB("min FA %u < norm FA %u < max FA %u OK\n",
1296 min_false_alarms, false_alarms, max_false_alarms);
1301 static int iwl4965_sensitivity_callback(struct iwl_priv *priv,
1302 struct iwl_cmd *cmd, struct sk_buff *skb)
1304 /* We didn't cache the SKB; let the caller free it */
1308 /* Prepare a SENSITIVITY_CMD, send to uCode if values have changed */
1309 static int iwl4965_sensitivity_write(struct iwl_priv *priv, u8 flags)
1311 struct iwl4965_sensitivity_cmd cmd ;
1312 struct iwl4965_sensitivity_data *data = NULL;
1313 struct iwl_host_cmd cmd_out = {
1314 .id = SENSITIVITY_CMD,
1315 .len = sizeof(struct iwl4965_sensitivity_cmd),
1316 .meta.flags = flags,
1321 data = &(priv->sensitivity_data);
1323 memset(&cmd, 0, sizeof(cmd));
1325 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_INDEX] =
1326 cpu_to_le16((u16)data->auto_corr_ofdm);
1327 cmd.table[HD_AUTO_CORR32_X4_TH_ADD_MIN_MRC_INDEX] =
1328 cpu_to_le16((u16)data->auto_corr_ofdm_mrc);
1329 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_INDEX] =
1330 cpu_to_le16((u16)data->auto_corr_ofdm_x1);
1331 cmd.table[HD_AUTO_CORR32_X1_TH_ADD_MIN_MRC_INDEX] =
1332 cpu_to_le16((u16)data->auto_corr_ofdm_mrc_x1);
1334 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_INDEX] =
1335 cpu_to_le16((u16)data->auto_corr_cck);
1336 cmd.table[HD_AUTO_CORR40_X4_TH_ADD_MIN_MRC_INDEX] =
1337 cpu_to_le16((u16)data->auto_corr_cck_mrc);
1339 cmd.table[HD_MIN_ENERGY_CCK_DET_INDEX] =
1340 cpu_to_le16((u16)data->nrg_th_cck);
1341 cmd.table[HD_MIN_ENERGY_OFDM_DET_INDEX] =
1342 cpu_to_le16((u16)data->nrg_th_ofdm);
1344 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
1345 __constant_cpu_to_le16(190);
1346 cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
1347 __constant_cpu_to_le16(390);
1348 cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
1349 __constant_cpu_to_le16(62);
1351 IWL_DEBUG_CALIB("ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
1352 data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
1353 data->auto_corr_ofdm_x1, data->auto_corr_ofdm_mrc_x1,
1356 IWL_DEBUG_CALIB("cck: ac %u mrc %u thresh %u\n",
1357 data->auto_corr_cck, data->auto_corr_cck_mrc,
1360 /* Update uCode's "work" table, and copy it to DSP */
1361 cmd.control = SENSITIVITY_CMD_CONTROL_WORK_TABLE;
1363 if (flags & CMD_ASYNC)
1364 cmd_out.meta.u.callback = iwl4965_sensitivity_callback;
1366 /* Don't send command to uCode if nothing has changed */
1367 if (!memcmp(&cmd.table[0], &(priv->sensitivity_tbl[0]),
1368 sizeof(u16)*HD_TABLE_SIZE)) {
1369 IWL_DEBUG_CALIB("No change in SENSITIVITY_CMD\n");
1373 /* Copy table for comparison next time */
1374 memcpy(&(priv->sensitivity_tbl[0]), &(cmd.table[0]),
1375 sizeof(u16)*HD_TABLE_SIZE);
1377 ret = iwl_send_cmd(priv, &cmd_out);
1379 IWL_ERROR("SENSITIVITY_CMD failed\n");
1384 void iwl4965_init_sensitivity(struct iwl_priv *priv, u8 flags, u8 force)
1386 struct iwl4965_sensitivity_data *data = NULL;
1390 IWL_DEBUG_CALIB("Start iwl4965_init_sensitivity\n");
1393 memset(&(priv->sensitivity_tbl[0]), 0,
1394 sizeof(u16)*HD_TABLE_SIZE);
1396 /* Clear driver's sensitivity algo data */
1397 data = &(priv->sensitivity_data);
1398 memset(data, 0, sizeof(struct iwl4965_sensitivity_data));
1400 data->num_in_cck_no_fa = 0;
1401 data->nrg_curr_state = IWL_FA_TOO_MANY;
1402 data->nrg_prev_state = IWL_FA_TOO_MANY;
1403 data->nrg_silence_ref = 0;
1404 data->nrg_silence_idx = 0;
1405 data->nrg_energy_idx = 0;
1407 for (i = 0; i < 10; i++)
1408 data->nrg_value[i] = 0;
1410 for (i = 0; i < NRG_NUM_PREV_STAT_L; i++)
1411 data->nrg_silence_rssi[i] = 0;
1413 data->auto_corr_ofdm = 90;
1414 data->auto_corr_ofdm_mrc = 170;
1415 data->auto_corr_ofdm_x1 = 105;
1416 data->auto_corr_ofdm_mrc_x1 = 220;
1417 data->auto_corr_cck = AUTO_CORR_CCK_MIN_VAL_DEF;
1418 data->auto_corr_cck_mrc = 200;
1419 data->nrg_th_cck = 100;
1420 data->nrg_th_ofdm = 100;
1422 data->last_bad_plcp_cnt_ofdm = 0;
1423 data->last_fa_cnt_ofdm = 0;
1424 data->last_bad_plcp_cnt_cck = 0;
1425 data->last_fa_cnt_cck = 0;
1427 /* Clear prior Sensitivity command data to force send to uCode */
1429 memset(&(priv->sensitivity_tbl[0]), 0,
1430 sizeof(u16)*HD_TABLE_SIZE);
1432 ret |= iwl4965_sensitivity_write(priv, flags);
1433 IWL_DEBUG_CALIB("<<return 0x%X\n", ret);
1439 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
1440 * Called after every association, but this runs only once!
1441 * ... once chain noise is calibrated the first time, it's good forever. */
1442 void iwl4965_chain_noise_reset(struct iwl_priv *priv)
1444 struct iwl4965_chain_noise_data *data = NULL;
1446 data = &(priv->chain_noise_data);
1447 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
1448 struct iwl4965_calibration_cmd cmd;
1450 memset(&cmd, 0, sizeof(cmd));
1451 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1452 cmd.diff_gain_a = 0;
1453 cmd.diff_gain_b = 0;
1454 cmd.diff_gain_c = 0;
1455 iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
1456 sizeof(cmd), &cmd, NULL);
1458 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
1459 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
1465 * Accumulate 20 beacons of signal and noise statistics for each of
1466 * 3 receivers/antennas/rx-chains, then figure out:
1467 * 1) Which antennas are connected.
1468 * 2) Differential rx gain settings to balance the 3 receivers.
1470 static void iwl4965_noise_calibration(struct iwl_priv *priv,
1471 struct iwl4965_notif_statistics *stat_resp)
1473 struct iwl4965_chain_noise_data *data = NULL;
1482 u32 average_sig[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1483 u32 average_noise[NUM_RX_CHAINS] = {INITIALIZATION_VALUE};
1484 u32 max_average_sig;
1485 u16 max_average_sig_antenna_i;
1486 u32 min_average_noise = MIN_AVERAGE_NOISE_MAX_VALUE;
1487 u16 min_average_noise_antenna_i = INITIALIZATION_VALUE;
1489 u16 chan_num = INITIALIZATION_VALUE;
1490 u32 band = INITIALIZATION_VALUE;
1491 u32 active_chains = 0;
1492 unsigned long flags;
1493 struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
1495 data = &(priv->chain_noise_data);
1497 /* Accumulate just the first 20 beacons after the first association,
1498 * then we're done forever. */
1499 if (data->state != IWL_CHAIN_NOISE_ACCUMULATE) {
1500 if (data->state == IWL_CHAIN_NOISE_ALIVE)
1501 IWL_DEBUG_CALIB("Wait for noise calib reset\n");
1505 spin_lock_irqsave(&priv->lock, flags);
1506 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1507 IWL_DEBUG_CALIB(" << Interference data unavailable\n");
1508 spin_unlock_irqrestore(&priv->lock, flags);
1512 band = (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) ? 0 : 1;
1513 chan_num = le16_to_cpu(priv->staging_rxon.channel);
1515 /* Make sure we accumulate data for just the associated channel
1516 * (even if scanning). */
1517 if ((chan_num != (le32_to_cpu(stat_resp->flag) >> 16)) ||
1518 ((STATISTICS_REPLY_FLG_BAND_24G_MSK ==
1519 (stat_resp->flag & STATISTICS_REPLY_FLG_BAND_24G_MSK)) && band)) {
1520 IWL_DEBUG_CALIB("Stats not from chan=%d, band=%d\n",
1522 spin_unlock_irqrestore(&priv->lock, flags);
1526 /* Accumulate beacon statistics values across 20 beacons */
1527 chain_noise_a = le32_to_cpu(rx_info->beacon_silence_rssi_a) &
1529 chain_noise_b = le32_to_cpu(rx_info->beacon_silence_rssi_b) &
1531 chain_noise_c = le32_to_cpu(rx_info->beacon_silence_rssi_c) &
1534 chain_sig_a = le32_to_cpu(rx_info->beacon_rssi_a) & IN_BAND_FILTER;
1535 chain_sig_b = le32_to_cpu(rx_info->beacon_rssi_b) & IN_BAND_FILTER;
1536 chain_sig_c = le32_to_cpu(rx_info->beacon_rssi_c) & IN_BAND_FILTER;
1538 spin_unlock_irqrestore(&priv->lock, flags);
1540 data->beacon_count++;
1542 data->chain_noise_a = (chain_noise_a + data->chain_noise_a);
1543 data->chain_noise_b = (chain_noise_b + data->chain_noise_b);
1544 data->chain_noise_c = (chain_noise_c + data->chain_noise_c);
1546 data->chain_signal_a = (chain_sig_a + data->chain_signal_a);
1547 data->chain_signal_b = (chain_sig_b + data->chain_signal_b);
1548 data->chain_signal_c = (chain_sig_c + data->chain_signal_c);
1550 IWL_DEBUG_CALIB("chan=%d, band=%d, beacon=%d\n", chan_num, band,
1551 data->beacon_count);
1552 IWL_DEBUG_CALIB("chain_sig: a %d b %d c %d\n",
1553 chain_sig_a, chain_sig_b, chain_sig_c);
1554 IWL_DEBUG_CALIB("chain_noise: a %d b %d c %d\n",
1555 chain_noise_a, chain_noise_b, chain_noise_c);
1557 /* If this is the 20th beacon, determine:
1558 * 1) Disconnected antennas (using signal strengths)
1559 * 2) Differential gain (using silence noise) to balance receivers */
1560 if (data->beacon_count == CAL_NUM_OF_BEACONS) {
1562 /* Analyze signal for disconnected antenna */
1563 average_sig[0] = (data->chain_signal_a) / CAL_NUM_OF_BEACONS;
1564 average_sig[1] = (data->chain_signal_b) / CAL_NUM_OF_BEACONS;
1565 average_sig[2] = (data->chain_signal_c) / CAL_NUM_OF_BEACONS;
1567 if (average_sig[0] >= average_sig[1]) {
1568 max_average_sig = average_sig[0];
1569 max_average_sig_antenna_i = 0;
1570 active_chains = (1 << max_average_sig_antenna_i);
1572 max_average_sig = average_sig[1];
1573 max_average_sig_antenna_i = 1;
1574 active_chains = (1 << max_average_sig_antenna_i);
1577 if (average_sig[2] >= max_average_sig) {
1578 max_average_sig = average_sig[2];
1579 max_average_sig_antenna_i = 2;
1580 active_chains = (1 << max_average_sig_antenna_i);
1583 IWL_DEBUG_CALIB("average_sig: a %d b %d c %d\n",
1584 average_sig[0], average_sig[1], average_sig[2]);
1585 IWL_DEBUG_CALIB("max_average_sig = %d, antenna %d\n",
1586 max_average_sig, max_average_sig_antenna_i);
1588 /* Compare signal strengths for all 3 receivers. */
1589 for (i = 0; i < NUM_RX_CHAINS; i++) {
1590 if (i != max_average_sig_antenna_i) {
1591 s32 rssi_delta = (max_average_sig -
1594 /* If signal is very weak, compared with
1595 * strongest, mark it as disconnected. */
1596 if (rssi_delta > MAXIMUM_ALLOWED_PATHLOSS)
1597 data->disconn_array[i] = 1;
1599 active_chains |= (1 << i);
1600 IWL_DEBUG_CALIB("i = %d rssiDelta = %d "
1601 "disconn_array[i] = %d\n",
1602 i, rssi_delta, data->disconn_array[i]);
1606 /*If both chains A & B are disconnected -
1607 * connect B and leave A as is */
1608 if (data->disconn_array[CHAIN_A] &&
1609 data->disconn_array[CHAIN_B]) {
1610 data->disconn_array[CHAIN_B] = 0;
1611 active_chains |= (1 << CHAIN_B);
1612 IWL_DEBUG_CALIB("both A & B chains are disconnected! "
1613 "W/A - declare B as connected\n");
1616 IWL_DEBUG_CALIB("active_chains (bitwise) = 0x%x\n",
1619 /* Save for use within RXON, TX, SCAN commands, etc. */
1620 priv->valid_antenna = active_chains;
1622 /* Analyze noise for rx balance */
1623 average_noise[0] = ((data->chain_noise_a)/CAL_NUM_OF_BEACONS);
1624 average_noise[1] = ((data->chain_noise_b)/CAL_NUM_OF_BEACONS);
1625 average_noise[2] = ((data->chain_noise_c)/CAL_NUM_OF_BEACONS);
1627 for (i = 0; i < NUM_RX_CHAINS; i++) {
1628 if (!(data->disconn_array[i]) &&
1629 (average_noise[i] <= min_average_noise)) {
1630 /* This means that chain i is active and has
1631 * lower noise values so far: */
1632 min_average_noise = average_noise[i];
1633 min_average_noise_antenna_i = i;
1637 data->delta_gain_code[min_average_noise_antenna_i] = 0;
1639 IWL_DEBUG_CALIB("average_noise: a %d b %d c %d\n",
1640 average_noise[0], average_noise[1],
1643 IWL_DEBUG_CALIB("min_average_noise = %d, antenna %d\n",
1644 min_average_noise, min_average_noise_antenna_i);
1646 for (i = 0; i < NUM_RX_CHAINS; i++) {
1649 if (!(data->disconn_array[i]) &&
1650 (data->delta_gain_code[i] ==
1651 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
1652 delta_g = average_noise[i] - min_average_noise;
1653 data->delta_gain_code[i] = (u8)((delta_g *
1655 if (CHAIN_NOISE_MAX_DELTA_GAIN_CODE <
1656 data->delta_gain_code[i])
1657 data->delta_gain_code[i] =
1658 CHAIN_NOISE_MAX_DELTA_GAIN_CODE;
1660 data->delta_gain_code[i] =
1661 (data->delta_gain_code[i] | (1 << 2));
1663 data->delta_gain_code[i] = 0;
1665 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
1666 data->delta_gain_code[0],
1667 data->delta_gain_code[1],
1668 data->delta_gain_code[2]);
1670 /* Differential gain gets sent to uCode only once */
1671 if (!data->radio_write) {
1672 struct iwl4965_calibration_cmd cmd;
1673 data->radio_write = 1;
1675 memset(&cmd, 0, sizeof(cmd));
1676 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
1677 cmd.diff_gain_a = data->delta_gain_code[0];
1678 cmd.diff_gain_b = data->delta_gain_code[1];
1679 cmd.diff_gain_c = data->delta_gain_code[2];
1680 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
1683 IWL_DEBUG_CALIB("fail sending cmd "
1684 "REPLY_PHY_CALIBRATION_CMD \n");
1686 /* TODO we might want recalculate
1687 * rx_chain in rxon cmd */
1689 /* Mark so we run this algo only once! */
1690 data->state = IWL_CHAIN_NOISE_CALIBRATED;
1692 data->chain_noise_a = 0;
1693 data->chain_noise_b = 0;
1694 data->chain_noise_c = 0;
1695 data->chain_signal_a = 0;
1696 data->chain_signal_b = 0;
1697 data->chain_signal_c = 0;
1698 data->beacon_count = 0;
1703 static void iwl4965_sensitivity_calibration(struct iwl_priv *priv,
1704 struct iwl4965_notif_statistics *resp)
1713 struct iwl4965_sensitivity_data *data = NULL;
1714 struct statistics_rx_non_phy *rx_info = &(resp->rx.general);
1715 struct statistics_rx *statistics = &(resp->rx);
1716 unsigned long flags;
1717 struct statistics_general_data statis;
1720 data = &(priv->sensitivity_data);
1722 if (!iwl_is_associated(priv)) {
1723 IWL_DEBUG_CALIB("<< - not associated\n");
1727 spin_lock_irqsave(&priv->lock, flags);
1728 if (rx_info->interference_data_flag != INTERFERENCE_DATA_AVAILABLE) {
1729 IWL_DEBUG_CALIB("<< invalid data.\n");
1730 spin_unlock_irqrestore(&priv->lock, flags);
1734 /* Extract Statistics: */
1735 rx_enable_time = le32_to_cpu(rx_info->channel_load);
1736 fa_cck = le32_to_cpu(statistics->cck.false_alarm_cnt);
1737 fa_ofdm = le32_to_cpu(statistics->ofdm.false_alarm_cnt);
1738 bad_plcp_cck = le32_to_cpu(statistics->cck.plcp_err);
1739 bad_plcp_ofdm = le32_to_cpu(statistics->ofdm.plcp_err);
1741 statis.beacon_silence_rssi_a =
1742 le32_to_cpu(statistics->general.beacon_silence_rssi_a);
1743 statis.beacon_silence_rssi_b =
1744 le32_to_cpu(statistics->general.beacon_silence_rssi_b);
1745 statis.beacon_silence_rssi_c =
1746 le32_to_cpu(statistics->general.beacon_silence_rssi_c);
1747 statis.beacon_energy_a =
1748 le32_to_cpu(statistics->general.beacon_energy_a);
1749 statis.beacon_energy_b =
1750 le32_to_cpu(statistics->general.beacon_energy_b);
1751 statis.beacon_energy_c =
1752 le32_to_cpu(statistics->general.beacon_energy_c);
1754 spin_unlock_irqrestore(&priv->lock, flags);
1756 IWL_DEBUG_CALIB("rx_enable_time = %u usecs\n", rx_enable_time);
1758 if (!rx_enable_time) {
1759 IWL_DEBUG_CALIB("<< RX Enable Time == 0! \n");
1763 /* These statistics increase monotonically, and do not reset
1764 * at each beacon. Calculate difference from last value, or just
1765 * use the new statistics value if it has reset or wrapped around. */
1766 if (data->last_bad_plcp_cnt_cck > bad_plcp_cck)
1767 data->last_bad_plcp_cnt_cck = bad_plcp_cck;
1769 bad_plcp_cck -= data->last_bad_plcp_cnt_cck;
1770 data->last_bad_plcp_cnt_cck += bad_plcp_cck;
1773 if (data->last_bad_plcp_cnt_ofdm > bad_plcp_ofdm)
1774 data->last_bad_plcp_cnt_ofdm = bad_plcp_ofdm;
1776 bad_plcp_ofdm -= data->last_bad_plcp_cnt_ofdm;
1777 data->last_bad_plcp_cnt_ofdm += bad_plcp_ofdm;
1780 if (data->last_fa_cnt_ofdm > fa_ofdm)
1781 data->last_fa_cnt_ofdm = fa_ofdm;
1783 fa_ofdm -= data->last_fa_cnt_ofdm;
1784 data->last_fa_cnt_ofdm += fa_ofdm;
1787 if (data->last_fa_cnt_cck > fa_cck)
1788 data->last_fa_cnt_cck = fa_cck;
1790 fa_cck -= data->last_fa_cnt_cck;
1791 data->last_fa_cnt_cck += fa_cck;
1794 /* Total aborted signal locks */
1795 norm_fa_ofdm = fa_ofdm + bad_plcp_ofdm;
1796 norm_fa_cck = fa_cck + bad_plcp_cck;
1798 IWL_DEBUG_CALIB("cck: fa %u badp %u ofdm: fa %u badp %u\n", fa_cck,
1799 bad_plcp_cck, fa_ofdm, bad_plcp_ofdm);
1801 iwl4965_sens_auto_corr_ofdm(priv, norm_fa_ofdm, rx_enable_time);
1802 iwl4965_sens_energy_cck(priv, norm_fa_cck, rx_enable_time, &statis);
1803 ret = iwl4965_sensitivity_write(priv, CMD_ASYNC);
1808 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
1810 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1813 mutex_lock(&priv->mutex);
1815 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1816 test_bit(STATUS_SCANNING, &priv->status)) {
1817 mutex_unlock(&priv->mutex);
1821 if (priv->start_calib) {
1822 iwl4965_noise_calibration(priv, &priv->statistics);
1824 if (priv->sensitivity_data.state ==
1825 IWL_SENS_CALIB_NEED_REINIT) {
1826 iwl4965_init_sensitivity(priv, CMD_ASYNC, 0);
1827 priv->sensitivity_data.state = IWL_SENS_CALIB_ALLOWED;
1829 iwl4965_sensitivity_calibration(priv,
1833 mutex_unlock(&priv->mutex);
1836 #endif /*CONFIG_IWL4965_SENSITIVITY*/
1838 static void iwl4965_bg_txpower_work(struct work_struct *work)
1840 struct iwl_priv *priv = container_of(work, struct iwl_priv,
1843 /* If a scan happened to start before we got here
1844 * then just return; the statistics notification will
1845 * kick off another scheduled work to compensate for
1846 * any temperature delta we missed here. */
1847 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1848 test_bit(STATUS_SCANNING, &priv->status))
1851 mutex_lock(&priv->mutex);
1853 /* Regardless of if we are assocaited, we must reconfigure the
1854 * TX power since frames can be sent on non-radar channels while
1856 iwl4965_hw_reg_send_txpower(priv);
1858 /* Update last_temperature to keep is_calib_needed from running
1859 * when it isn't needed... */
1860 priv->last_temperature = priv->temperature;
1862 mutex_unlock(&priv->mutex);
1866 * Acquire priv->lock before calling this function !
1868 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
1870 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
1871 (index & 0xff) | (txq_id << 8));
1872 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
1876 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
1877 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
1878 * @scd_retry: (1) Indicates queue will be used in aggregation mode
1880 * NOTE: Acquire priv->lock before calling this function !
1882 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
1883 struct iwl4965_tx_queue *txq,
1884 int tx_fifo_id, int scd_retry)
1886 int txq_id = txq->q.id;
1888 /* Find out whether to activate Tx queue */
1889 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
1891 /* Set up and activate */
1892 iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
1893 (active << SCD_QUEUE_STTS_REG_POS_ACTIVE) |
1894 (tx_fifo_id << SCD_QUEUE_STTS_REG_POS_TXF) |
1895 (scd_retry << SCD_QUEUE_STTS_REG_POS_WSL) |
1896 (scd_retry << SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
1897 SCD_QUEUE_STTS_REG_MSK);
1899 txq->sched_retry = scd_retry;
1901 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
1902 active ? "Activate" : "Deactivate",
1903 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
1906 static const u16 default_queue_to_tx_fifo[] = {
1916 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
1918 set_bit(txq_id, &priv->txq_ctx_active_msk);
1921 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
1923 clear_bit(txq_id, &priv->txq_ctx_active_msk);
1926 int iwl4965_alive_notify(struct iwl_priv *priv)
1930 unsigned long flags;
1933 spin_lock_irqsave(&priv->lock, flags);
1935 #ifdef CONFIG_IWL4965_SENSITIVITY
1936 memset(&(priv->sensitivity_data), 0,
1937 sizeof(struct iwl4965_sensitivity_data));
1938 memset(&(priv->chain_noise_data), 0,
1939 sizeof(struct iwl4965_chain_noise_data));
1940 for (i = 0; i < NUM_RX_CHAINS; i++)
1941 priv->chain_noise_data.delta_gain_code[i] =
1942 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
1943 #endif /* CONFIG_IWL4965_SENSITIVITY*/
1944 ret = iwl_grab_nic_access(priv);
1946 spin_unlock_irqrestore(&priv->lock, flags);
1950 /* Clear 4965's internal Tx Scheduler data base */
1951 priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
1952 a = priv->scd_base_addr + SCD_CONTEXT_DATA_OFFSET;
1953 for (; a < priv->scd_base_addr + SCD_TX_STTS_BITMAP_OFFSET; a += 4)
1954 iwl_write_targ_mem(priv, a, 0);
1955 for (; a < priv->scd_base_addr + SCD_TRANSLATE_TBL_OFFSET; a += 4)
1956 iwl_write_targ_mem(priv, a, 0);
1957 for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
1958 iwl_write_targ_mem(priv, a, 0);
1960 /* Tel 4965 where to find Tx byte count tables */
1961 iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
1962 (priv->shared_phys +
1963 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
1965 /* Disable chain mode for all queues */
1966 iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
1968 /* Initialize each Tx queue (including the command queue) */
1969 for (i = 0; i < priv->hw_params.max_txq_num; i++) {
1971 /* TFD circular buffer read/write indexes */
1972 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
1973 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
1975 /* Max Tx Window size for Scheduler-ACK mode */
1976 iwl_write_targ_mem(priv, priv->scd_base_addr +
1977 SCD_CONTEXT_QUEUE_OFFSET(i),
1979 SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
1980 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
1983 iwl_write_targ_mem(priv, priv->scd_base_addr +
1984 SCD_CONTEXT_QUEUE_OFFSET(i) +
1987 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
1988 SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
1991 iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
1992 (1 << priv->hw_params.max_txq_num) - 1);
1994 /* Activate all Tx DMA/FIFO channels */
1995 iwl_write_prph(priv, IWL49_SCD_TXFACT,
1996 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
1998 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
2000 /* Map each Tx/cmd queue to its corresponding fifo */
2001 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
2002 int ac = default_queue_to_tx_fifo[i];
2003 iwl4965_txq_ctx_activate(priv, i);
2004 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
2007 iwl_release_nic_access(priv);
2008 spin_unlock_irqrestore(&priv->lock, flags);
2010 /* Ask for statistics now, the uCode will send statistics notification
2011 * periodically after association */
2012 iwl_send_statistics_request(priv, CMD_ASYNC);
2017 * iwl4965_hw_set_hw_params
2019 * Called when initializing driver
2021 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
2024 if ((priv->cfg->mod_params->num_of_queues > IWL_MAX_NUM_QUEUES) ||
2025 (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
2026 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
2027 IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
2031 priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
2032 priv->hw_params.tx_cmd_len = sizeof(struct iwl4965_tx_cmd);
2033 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
2034 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
2035 if (priv->cfg->mod_params->amsdu_size_8K)
2036 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
2038 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
2039 priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
2040 priv->hw_params.max_stations = IWL4965_STATION_COUNT;
2041 priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
2043 priv->hw_params.tx_ant_num = 2;
2049 * iwl4965_hw_txq_ctx_free - Free TXQ Context
2051 * Destroy all TX DMA queues and structures
2053 void iwl4965_hw_txq_ctx_free(struct iwl_priv *priv)
2058 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
2059 iwl4965_tx_queue_free(priv, &priv->txq[txq_id]);
2061 /* Keep-warm buffer */
2062 iwl4965_kw_free(priv);
2066 * iwl4965_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
2068 * Does NOT advance any TFD circular buffer read/write indexes
2069 * Does NOT free the TFD itself (which is within circular buffer)
2071 int iwl4965_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
2073 struct iwl4965_tfd_frame *bd_tmp = (struct iwl4965_tfd_frame *)&txq->bd[0];
2074 struct iwl4965_tfd_frame *bd = &bd_tmp[txq->q.read_ptr];
2075 struct pci_dev *dev = priv->pci_dev;
2080 /* Host command buffers stay mapped in memory, nothing to clean */
2081 if (txq->q.id == IWL_CMD_QUEUE_NUM)
2084 /* Sanity check on number of chunks */
2085 counter = IWL_GET_BITS(*bd, num_tbs);
2086 if (counter > MAX_NUM_OF_TBS) {
2087 IWL_ERROR("Too many chunks: %i\n", counter);
2088 /* @todo issue fatal error, it is quite serious situation */
2092 /* Unmap chunks, if any.
2093 * TFD info for odd chunks is different format than for even chunks. */
2094 for (i = 0; i < counter; i++) {
2101 IWL_GET_BITS(bd->pa[index], tb2_addr_lo16) |
2102 (IWL_GET_BITS(bd->pa[index],
2103 tb2_addr_hi20) << 16),
2104 IWL_GET_BITS(bd->pa[index], tb2_len),
2108 pci_unmap_single(dev,
2109 le32_to_cpu(bd->pa[index].tb1_addr),
2110 IWL_GET_BITS(bd->pa[index], tb1_len),
2113 /* Free SKB, if any, for this chunk */
2114 if (txq->txb[txq->q.read_ptr].skb[i]) {
2115 struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[i];
2118 txq->txb[txq->q.read_ptr].skb[i] = NULL;
2124 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
2126 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
2130 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
2143 *res = ((num * 2 + denom) / (denom * 2)) * sign;
2149 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
2151 * Determines power supply voltage compensation for txpower calculations.
2152 * Returns number of 1/2-dB steps to subtract from gain table index,
2153 * to compensate for difference between power supply voltage during
2154 * factory measurements, vs. current power supply voltage.
2156 * Voltage indication is higher for lower voltage.
2157 * Lower voltage requires more gain (lower gain table index).
2159 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
2160 s32 current_voltage)
2164 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
2165 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
2168 iwl4965_math_div_round(current_voltage - eeprom_voltage,
2169 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
2171 if (current_voltage > eeprom_voltage)
2173 if ((comp < -2) || (comp > 2))
2179 static const struct iwl_channel_info *
2180 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
2181 enum ieee80211_band band, u16 channel)
2183 const struct iwl_channel_info *ch_info;
2185 ch_info = iwl_get_channel_info(priv, band, channel);
2187 if (!is_channel_valid(ch_info))
2193 static s32 iwl4965_get_tx_atten_grp(u16 channel)
2195 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
2196 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
2197 return CALIB_CH_GROUP_5;
2199 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
2200 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
2201 return CALIB_CH_GROUP_1;
2203 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
2204 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
2205 return CALIB_CH_GROUP_2;
2207 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
2208 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
2209 return CALIB_CH_GROUP_3;
2211 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
2212 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
2213 return CALIB_CH_GROUP_4;
2215 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
2219 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
2223 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
2224 if (priv->eeprom.calib_info.band_info[b].ch_from == 0)
2227 if ((channel >= priv->eeprom.calib_info.band_info[b].ch_from)
2228 && (channel <= priv->eeprom.calib_info.band_info[b].ch_to))
2235 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
2242 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
2248 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
2250 * Interpolates factory measurements from the two sample channels within a
2251 * sub-band, to apply to channel of interest. Interpolation is proportional to
2252 * differences in channel frequencies, which is proportional to differences
2253 * in channel number.
2255 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
2256 struct iwl4965_eeprom_calib_ch_info *chan_info)
2261 const struct iwl4965_eeprom_calib_measure *m1;
2262 const struct iwl4965_eeprom_calib_measure *m2;
2263 struct iwl4965_eeprom_calib_measure *omeas;
2267 s = iwl4965_get_sub_band(priv, channel);
2268 if (s >= EEPROM_TX_POWER_BANDS) {
2269 IWL_ERROR("Tx Power can not find channel %d ", channel);
2273 ch_i1 = priv->eeprom.calib_info.band_info[s].ch1.ch_num;
2274 ch_i2 = priv->eeprom.calib_info.band_info[s].ch2.ch_num;
2275 chan_info->ch_num = (u8) channel;
2277 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
2278 channel, s, ch_i1, ch_i2);
2280 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
2281 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
2282 m1 = &(priv->eeprom.calib_info.band_info[s].ch1.
2283 measurements[c][m]);
2284 m2 = &(priv->eeprom.calib_info.band_info[s].ch2.
2285 measurements[c][m]);
2286 omeas = &(chan_info->measurements[c][m]);
2289 (u8) iwl4965_interpolate_value(channel, ch_i1,
2294 (u8) iwl4965_interpolate_value(channel, ch_i1,
2295 m1->gain_idx, ch_i2,
2297 omeas->temperature =
2298 (u8) iwl4965_interpolate_value(channel, ch_i1,
2303 (s8) iwl4965_interpolate_value(channel, ch_i1,
2308 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
2309 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
2311 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
2312 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
2314 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
2315 m1->pa_det, m2->pa_det, omeas->pa_det);
2317 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
2318 m1->temperature, m2->temperature,
2319 omeas->temperature);
2326 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
2327 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
2328 static s32 back_off_table[] = {
2329 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
2330 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
2331 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
2332 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
2336 /* Thermal compensation values for txpower for various frequency ranges ...
2337 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
2338 static struct iwl4965_txpower_comp_entry {
2339 s32 degrees_per_05db_a;
2340 s32 degrees_per_05db_a_denom;
2341 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
2342 {9, 2}, /* group 0 5.2, ch 34-43 */
2343 {4, 1}, /* group 1 5.2, ch 44-70 */
2344 {4, 1}, /* group 2 5.2, ch 71-124 */
2345 {4, 1}, /* group 3 5.2, ch 125-200 */
2346 {3, 1} /* group 4 2.4, ch all */
2349 static s32 get_min_power_index(s32 rate_power_index, u32 band)
2352 if ((rate_power_index & 7) <= 4)
2353 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
2355 return MIN_TX_GAIN_INDEX;
2363 static const struct gain_entry gain_table[2][108] = {
2364 /* 5.2GHz power gain index table */
2366 {123, 0x3F}, /* highest txpower */
2475 /* 2.4GHz power gain index table */
2477 {110, 0x3f}, /* highest txpower */
2588 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
2589 u8 is_fat, u8 ctrl_chan_high,
2590 struct iwl4965_tx_power_db *tx_power_tbl)
2592 u8 saturation_power;
2594 s32 user_target_power;
2598 s32 current_regulatory;
2599 s32 txatten_grp = CALIB_CH_GROUP_MAX;
2602 const struct iwl_channel_info *ch_info = NULL;
2603 struct iwl4965_eeprom_calib_ch_info ch_eeprom_info;
2604 const struct iwl4965_eeprom_calib_measure *measurement;
2607 s32 voltage_compensation;
2608 s32 degrees_per_05db_num;
2609 s32 degrees_per_05db_denom;
2611 s32 temperature_comp[2];
2612 s32 factory_gain_index[2];
2613 s32 factory_actual_pwr[2];
2616 /* Sanity check requested level (dBm) */
2617 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
2618 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
2619 priv->user_txpower_limit);
2622 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
2623 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
2624 priv->user_txpower_limit);
2628 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
2629 * are used for indexing into txpower table) */
2630 user_target_power = 2 * priv->user_txpower_limit;
2632 /* Get current (RXON) channel, band, width */
2634 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
2636 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
2642 /* get txatten group, used to select 1) thermal txpower adjustment
2643 * and 2) mimo txpower balance between Tx chains. */
2644 txatten_grp = iwl4965_get_tx_atten_grp(channel);
2645 if (txatten_grp < 0)
2648 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
2649 channel, txatten_grp);
2658 /* hardware txpower limits ...
2659 * saturation (clipping distortion) txpowers are in half-dBm */
2661 saturation_power = priv->eeprom.calib_info.saturation_power24;
2663 saturation_power = priv->eeprom.calib_info.saturation_power52;
2665 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
2666 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
2668 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
2670 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
2673 /* regulatory txpower limits ... reg_limit values are in half-dBm,
2674 * max_power_avg values are in dBm, convert * 2 */
2676 reg_limit = ch_info->fat_max_power_avg * 2;
2678 reg_limit = ch_info->max_power_avg * 2;
2680 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
2681 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
2683 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
2685 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
2688 /* Interpolate txpower calibration values for this channel,
2689 * based on factory calibration tests on spaced channels. */
2690 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
2692 /* calculate tx gain adjustment based on power supply voltage */
2693 voltage = priv->eeprom.calib_info.voltage;
2694 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
2695 voltage_compensation =
2696 iwl4965_get_voltage_compensation(voltage, init_voltage);
2698 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
2700 voltage, voltage_compensation);
2702 /* get current temperature (Celsius) */
2703 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
2704 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
2705 current_temp = KELVIN_TO_CELSIUS(current_temp);
2707 /* select thermal txpower adjustment params, based on channel group
2708 * (same frequency group used for mimo txatten adjustment) */
2709 degrees_per_05db_num =
2710 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
2711 degrees_per_05db_denom =
2712 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
2714 /* get per-chain txpower values from factory measurements */
2715 for (c = 0; c < 2; c++) {
2716 measurement = &ch_eeprom_info.measurements[c][1];
2718 /* txgain adjustment (in half-dB steps) based on difference
2719 * between factory and current temperature */
2720 factory_temp = measurement->temperature;
2721 iwl4965_math_div_round((current_temp - factory_temp) *
2722 degrees_per_05db_denom,
2723 degrees_per_05db_num,
2724 &temperature_comp[c]);
2726 factory_gain_index[c] = measurement->gain_idx;
2727 factory_actual_pwr[c] = measurement->actual_pow;
2729 IWL_DEBUG_TXPOWER("chain = %d\n", c);
2730 IWL_DEBUG_TXPOWER("fctry tmp %d, "
2731 "curr tmp %d, comp %d steps\n",
2732 factory_temp, current_temp,
2733 temperature_comp[c]);
2735 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
2736 factory_gain_index[c],
2737 factory_actual_pwr[c]);
2740 /* for each of 33 bit-rates (including 1 for CCK) */
2741 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
2743 union iwl4965_tx_power_dual_stream tx_power;
2745 /* for mimo, reduce each chain's txpower by half
2746 * (3dB, 6 steps), so total output power is regulatory
2749 current_regulatory = reg_limit -
2750 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
2753 current_regulatory = reg_limit;
2757 /* find txpower limit, either hardware or regulatory */
2758 power_limit = saturation_power - back_off_table[i];
2759 if (power_limit > current_regulatory)
2760 power_limit = current_regulatory;
2762 /* reduce user's txpower request if necessary
2763 * for this rate on this channel */
2764 target_power = user_target_power;
2765 if (target_power > power_limit)
2766 target_power = power_limit;
2768 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
2769 i, saturation_power - back_off_table[i],
2770 current_regulatory, user_target_power,
2773 /* for each of 2 Tx chains (radio transmitters) */
2774 for (c = 0; c < 2; c++) {
2779 (s32)le32_to_cpu(priv->card_alive_init.
2780 tx_atten[txatten_grp][c]);
2784 /* calculate index; higher index means lower txpower */
2785 power_index = (u8) (factory_gain_index[c] -
2787 factory_actual_pwr[c]) -
2788 temperature_comp[c] -
2789 voltage_compensation +
2792 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
2795 if (power_index < get_min_power_index(i, band))
2796 power_index = get_min_power_index(i, band);
2798 /* adjust 5 GHz index to support negative indexes */
2802 /* CCK, rate 32, reduce txpower for CCK */
2803 if (i == POWER_TABLE_CCK_ENTRY)
2805 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
2807 /* stay within the table! */
2808 if (power_index > 107) {
2809 IWL_WARNING("txpower index %d > 107\n",
2813 if (power_index < 0) {
2814 IWL_WARNING("txpower index %d < 0\n",
2819 /* fill txpower command for this rate/chain */
2820 tx_power.s.radio_tx_gain[c] =
2821 gain_table[band][power_index].radio;
2822 tx_power.s.dsp_predis_atten[c] =
2823 gain_table[band][power_index].dsp;
2825 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
2826 "gain 0x%02x dsp %d\n",
2827 c, atten_value, power_index,
2828 tx_power.s.radio_tx_gain[c],
2829 tx_power.s.dsp_predis_atten[c]);
2830 }/* for each chain */
2832 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
2834 }/* for each rate */
2840 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
2842 * Uses the active RXON for channel, band, and characteristics (fat, high)
2843 * The power limit is taken from priv->user_txpower_limit.
2845 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
2847 struct iwl4965_txpowertable_cmd cmd = { 0 };
2851 u8 ctrl_chan_high = 0;
2853 if (test_bit(STATUS_SCANNING, &priv->status)) {
2854 /* If this gets hit a lot, switch it to a BUG() and catch
2855 * the stack trace to find out who is calling this during
2857 IWL_WARNING("TX Power requested while scanning!\n");
2861 band = priv->band == IEEE80211_BAND_2GHZ;
2863 is_fat = is_fat_channel(priv->active_rxon.flags);
2866 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2870 cmd.channel = priv->active_rxon.channel;
2872 ret = iwl4965_fill_txpower_tbl(priv, band,
2873 le16_to_cpu(priv->active_rxon.channel),
2874 is_fat, ctrl_chan_high, &cmd.tx_power);
2878 ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
2884 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
2889 u8 ctrl_chan_high = 0;
2890 struct iwl4965_channel_switch_cmd cmd = { 0 };
2891 const struct iwl_channel_info *ch_info;
2893 band = priv->band == IEEE80211_BAND_2GHZ;
2895 ch_info = iwl_get_channel_info(priv, priv->band, channel);
2897 is_fat = is_fat_channel(priv->staging_rxon.flags);
2900 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
2904 cmd.expect_beacon = 0;
2905 cmd.channel = cpu_to_le16(channel);
2906 cmd.rxon_flags = priv->active_rxon.flags;
2907 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
2908 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
2910 cmd.expect_beacon = is_channel_radar(ch_info);
2912 cmd.expect_beacon = 1;
2914 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
2915 ctrl_chan_high, &cmd.tx_power);
2917 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
2921 rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
2925 #define RTS_HCCA_RETRY_LIMIT 3
2926 #define RTS_DFAULT_RETRY_LIMIT 60
2928 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
2929 struct iwl_cmd *cmd,
2930 struct ieee80211_tx_control *ctrl,
2931 struct ieee80211_hdr *hdr, int sta_id,
2934 struct iwl4965_tx_cmd *tx = &cmd->cmd.tx;
2935 u8 rts_retry_limit = 0;
2936 u8 data_retry_limit = 0;
2937 u16 fc = le16_to_cpu(hdr->frame_control);
2940 int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
2942 rate_plcp = iwl4965_rates[rate_idx].plcp;
2944 rts_retry_limit = (is_hcca) ?
2945 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
2947 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
2948 rate_flags |= RATE_MCS_CCK_MSK;
2951 if (ieee80211_is_probe_response(fc)) {
2952 data_retry_limit = 3;
2953 if (data_retry_limit < rts_retry_limit)
2954 rts_retry_limit = data_retry_limit;
2956 data_retry_limit = IWL_DEFAULT_TX_RETRY;
2958 if (priv->data_retry_limit != -1)
2959 data_retry_limit = priv->data_retry_limit;
2962 if (ieee80211_is_data(fc)) {
2963 tx->initial_rate_index = 0;
2964 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
2966 switch (fc & IEEE80211_FCTL_STYPE) {
2967 case IEEE80211_STYPE_AUTH:
2968 case IEEE80211_STYPE_DEAUTH:
2969 case IEEE80211_STYPE_ASSOC_REQ:
2970 case IEEE80211_STYPE_REASSOC_REQ:
2971 if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
2972 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2973 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
2980 /* Alternate between antenna A and B for successive frames */
2981 if (priv->use_ant_b_for_management_frame) {
2982 priv->use_ant_b_for_management_frame = 0;
2983 rate_flags |= RATE_MCS_ANT_B_MSK;
2985 priv->use_ant_b_for_management_frame = 1;
2986 rate_flags |= RATE_MCS_ANT_A_MSK;
2990 tx->rts_retry_limit = rts_retry_limit;
2991 tx->data_retry_limit = data_retry_limit;
2992 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2995 int iwl4965_hw_get_rx_read(struct iwl_priv *priv)
2997 struct iwl4965_shared *s = priv->shared_virt;
2998 return le32_to_cpu(s->rb_closed) & 0xFFF;
3001 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
3003 return priv->temperature;
3006 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
3007 struct iwl4965_frame *frame, u8 rate)
3009 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
3010 unsigned int frame_size;
3012 tx_beacon_cmd = &frame->u.beacon;
3013 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
3015 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
3016 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
3018 frame_size = iwl4965_fill_beacon_frame(priv,
3019 tx_beacon_cmd->frame,
3020 iwl4965_broadcast_addr,
3021 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
3023 BUG_ON(frame_size > MAX_MPDU_SIZE);
3024 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
3026 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
3027 tx_beacon_cmd->tx.rate_n_flags =
3028 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
3030 tx_beacon_cmd->tx.rate_n_flags =
3031 iwl4965_hw_set_rate_n_flags(rate, 0);
3033 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
3034 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
3035 return (sizeof(*tx_beacon_cmd) + frame_size);
3039 * Tell 4965 where to find circular buffer of Tx Frame Descriptors for
3040 * given Tx queue, and enable the DMA channel used for that queue.
3042 * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
3043 * channels supported in hardware.
3045 int iwl4965_hw_tx_queue_init(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
3048 unsigned long flags;
3049 int txq_id = txq->q.id;
3051 spin_lock_irqsave(&priv->lock, flags);
3052 rc = iwl_grab_nic_access(priv);
3054 spin_unlock_irqrestore(&priv->lock, flags);
3058 /* Circular buffer (TFD queue in DRAM) physical base address */
3059 iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
3060 txq->q.dma_addr >> 8);
3062 /* Enable DMA channel, using same id as for TFD queue */
3064 priv, IWL_FH_TCSR_CHNL_TX_CONFIG_REG(txq_id),
3065 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
3066 IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL);
3067 iwl_release_nic_access(priv);
3068 spin_unlock_irqrestore(&priv->lock, flags);
3073 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
3074 dma_addr_t addr, u16 len)
3077 struct iwl4965_tfd_frame *tfd = ptr;
3078 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
3080 /* Each TFD can point to a maximum 20 Tx buffers */
3081 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
3082 IWL_ERROR("Error can not send more than %d chunks\n",
3087 index = num_tbs / 2;
3088 is_odd = num_tbs & 0x1;
3091 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
3092 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
3093 iwl_get_dma_hi_address(addr));
3094 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
3096 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
3097 (u32) (addr & 0xffff));
3098 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
3099 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
3102 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
3107 static void iwl4965_hw_card_show_info(struct iwl_priv *priv)
3109 u16 hw_version = priv->eeprom.board_revision_4965;
3111 IWL_DEBUG_INFO("4965ABGN HW Version %u.%u.%u\n",
3112 ((hw_version >> 8) & 0x0F),
3113 ((hw_version >> 8) >> 4), (hw_version & 0x00FF));
3115 IWL_DEBUG_INFO("4965ABGN PBA Number %.16s\n",
3116 priv->eeprom.board_pba_number_4965);
3119 #define IWL_TX_CRC_SIZE 4
3120 #define IWL_TX_DELIMITER_SIZE 4
3123 * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
3125 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
3126 struct iwl4965_tx_queue *txq,
3130 int txq_id = txq->q.id;
3131 struct iwl4965_shared *shared_data = priv->shared_virt;
3133 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
3135 /* Set up byte count within first 256 entries */
3136 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3137 tfd_offset[txq->q.write_ptr], byte_cnt, len);
3139 /* If within first 64 entries, duplicate at end */
3140 if (txq->q.write_ptr < IWL4965_MAX_WIN_SIZE)
3141 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
3142 tfd_offset[IWL4965_QUEUE_SIZE + txq->q.write_ptr],
3147 * iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
3149 * Selects how many and which Rx receivers/antennas/chains to use.
3150 * This should not be used for scan command ... it puts data in wrong place.
3152 void iwl4965_set_rxon_chain(struct iwl_priv *priv)
3154 u8 is_single = is_single_stream(priv);
3155 u8 idle_state, rx_state;
3157 priv->staging_rxon.rx_chain = 0;
3158 rx_state = idle_state = 3;
3160 /* Tell uCode which antennas are actually connected.
3161 * Before first association, we assume all antennas are connected.
3162 * Just after first association, iwl4965_noise_calibration()
3163 * checks which antennas actually *are* connected. */
3164 priv->staging_rxon.rx_chain |=
3165 cpu_to_le16(priv->valid_antenna << RXON_RX_CHAIN_VALID_POS);
3167 /* How many receivers should we use? */
3168 iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
3169 priv->staging_rxon.rx_chain |=
3170 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
3171 priv->staging_rxon.rx_chain |=
3172 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
3174 if (!is_single && (rx_state >= 2) &&
3175 !test_bit(STATUS_POWER_PMI, &priv->status))
3176 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
3178 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
3180 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
3184 * sign_extend - Sign extend a value using specified bit as sign-bit
3186 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
3187 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
3189 * @param oper value to sign extend
3190 * @param index 0 based bit index (0<=index<32) to sign bit
3192 static s32 sign_extend(u32 oper, int index)
3194 u8 shift = 31 - index;
3196 return (s32)(oper << shift) >> shift;
3200 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
3201 * @statistics: Provides the temperature reading from the uCode
3203 * A return of <0 indicates bogus data in the statistics
3205 int iwl4965_get_temperature(const struct iwl_priv *priv)
3212 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
3213 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
3214 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
3215 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
3216 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
3217 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
3218 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
3220 IWL_DEBUG_TEMP("Running temperature calibration\n");
3221 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
3222 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
3223 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
3224 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
3228 * Temperature is only 23 bits, so sign extend out to 32.
3230 * NOTE If we haven't received a statistics notification yet
3231 * with an updated temperature, use R4 provided to us in the
3232 * "initialize" ALIVE response.
3234 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
3235 vt = sign_extend(R4, 23);
3238 le32_to_cpu(priv->statistics.general.temperature), 23);
3240 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
3244 IWL_ERROR("Calibration conflict R1 == R3\n");
3248 /* Calculate temperature in degrees Kelvin, adjust by 97%.
3249 * Add offset to center the adjustment around 0 degrees Centigrade. */
3250 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
3251 temperature /= (R3 - R1);
3252 temperature = (temperature * 97) / 100 +
3253 TEMPERATURE_CALIB_KELVIN_OFFSET;
3255 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
3256 KELVIN_TO_CELSIUS(temperature));
3261 /* Adjust Txpower only if temperature variance is greater than threshold. */
3262 #define IWL_TEMPERATURE_THRESHOLD 3
3265 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
3267 * If the temperature changed has changed sufficiently, then a recalibration
3270 * Assumes caller will replace priv->last_temperature once calibration
3273 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
3277 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
3278 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
3282 temp_diff = priv->temperature - priv->last_temperature;
3284 /* get absolute value */
3285 if (temp_diff < 0) {
3286 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
3287 temp_diff = -temp_diff;
3288 } else if (temp_diff == 0)
3289 IWL_DEBUG_POWER("Same temp, \n");
3291 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
3293 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
3294 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
3298 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
3303 /* Calculate noise level, based on measurements during network silence just
3304 * before arriving beacon. This measurement can be done only if we know
3305 * exactly when to expect beacons, therefore only when we're associated. */
3306 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
3308 struct statistics_rx_non_phy *rx_info
3309 = &(priv->statistics.rx.general);
3310 int num_active_rx = 0;
3311 int total_silence = 0;
3313 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
3315 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
3317 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
3319 if (bcn_silence_a) {
3320 total_silence += bcn_silence_a;
3323 if (bcn_silence_b) {
3324 total_silence += bcn_silence_b;
3327 if (bcn_silence_c) {
3328 total_silence += bcn_silence_c;
3332 /* Average among active antennas */
3334 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
3336 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
3338 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
3339 bcn_silence_a, bcn_silence_b, bcn_silence_c,
3340 priv->last_rx_noise);
3343 void iwl4965_hw_rx_statistics(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3345 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3349 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
3350 (int)sizeof(priv->statistics), pkt->len);
3352 change = ((priv->statistics.general.temperature !=
3353 pkt->u.stats.general.temperature) ||
3354 ((priv->statistics.flag &
3355 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
3356 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
3358 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
3360 set_bit(STATUS_STATISTICS, &priv->status);
3362 /* Reschedule the statistics timer to occur in
3363 * REG_RECALIB_PERIOD seconds to ensure we get a
3364 * thermal update even if the uCode doesn't give
3366 mod_timer(&priv->statistics_periodic, jiffies +
3367 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
3369 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3370 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
3371 iwl4965_rx_calc_noise(priv);
3372 #ifdef CONFIG_IWL4965_SENSITIVITY
3373 queue_work(priv->workqueue, &priv->sensitivity_work);
3377 iwl_leds_background(priv);
3379 /* If the hardware hasn't reported a change in
3380 * temperature then don't bother computing a
3381 * calibrated temperature value */
3385 temp = iwl4965_get_temperature(priv);
3389 if (priv->temperature != temp) {
3390 if (priv->temperature)
3391 IWL_DEBUG_TEMP("Temperature changed "
3392 "from %dC to %dC\n",
3393 KELVIN_TO_CELSIUS(priv->temperature),
3394 KELVIN_TO_CELSIUS(temp));
3396 IWL_DEBUG_TEMP("Temperature "
3397 "initialized to %dC\n",
3398 KELVIN_TO_CELSIUS(temp));
3401 priv->temperature = temp;
3402 set_bit(STATUS_TEMPERATURE, &priv->status);
3404 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
3405 iwl4965_is_temp_calib_needed(priv))
3406 queue_work(priv->workqueue, &priv->txpower_work);
3409 static void iwl4965_add_radiotap(struct iwl_priv *priv,
3410 struct sk_buff *skb,
3411 struct iwl4965_rx_phy_res *rx_start,
3412 struct ieee80211_rx_status *stats,
3415 s8 signal = stats->ssi;
3417 int rate = stats->rate_idx;
3418 u64 tsf = stats->mactime;
3420 __le16 phy_flags_hw = rx_start->phy_flags;
3421 struct iwl4965_rt_rx_hdr {
3422 struct ieee80211_radiotap_header rt_hdr;
3423 __le64 rt_tsf; /* TSF */
3424 u8 rt_flags; /* radiotap packet flags */
3425 u8 rt_rate; /* rate in 500kb/s */
3426 __le16 rt_channelMHz; /* channel in MHz */
3427 __le16 rt_chbitmask; /* channel bitfield */
3428 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
3430 u8 rt_antenna; /* antenna number */
3431 } __attribute__ ((packed)) *iwl4965_rt;
3433 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
3434 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
3435 if (net_ratelimit())
3436 printk(KERN_ERR "not enough headroom [%d] for "
3437 "radiotap head [%zd]\n",
3438 skb_headroom(skb), sizeof(*iwl4965_rt));
3442 /* put radiotap header in front of 802.11 header and data */
3443 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
3445 /* initialise radiotap header */
3446 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3447 iwl4965_rt->rt_hdr.it_pad = 0;
3449 /* total header + data */
3450 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
3451 &iwl4965_rt->rt_hdr.it_len);
3453 /* Indicate all the fields we add to the radiotap header */
3454 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3455 (1 << IEEE80211_RADIOTAP_FLAGS) |
3456 (1 << IEEE80211_RADIOTAP_RATE) |
3457 (1 << IEEE80211_RADIOTAP_CHANNEL) |
3458 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3459 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3460 (1 << IEEE80211_RADIOTAP_ANTENNA)),
3461 &iwl4965_rt->rt_hdr.it_present);
3463 /* Zero the flags, we'll add to them as we go */
3464 iwl4965_rt->rt_flags = 0;
3466 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
3468 iwl4965_rt->rt_dbmsignal = signal;
3469 iwl4965_rt->rt_dbmnoise = noise;
3471 /* Convert the channel frequency and set the flags */
3472 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
3473 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3474 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3475 IEEE80211_CHAN_5GHZ),
3476 &iwl4965_rt->rt_chbitmask);
3477 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3478 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
3479 IEEE80211_CHAN_2GHZ),
3480 &iwl4965_rt->rt_chbitmask);
3482 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
3483 IEEE80211_CHAN_2GHZ),
3484 &iwl4965_rt->rt_chbitmask);
3487 iwl4965_rt->rt_rate = 0;
3489 iwl4965_rt->rt_rate = iwl4965_rates[rate].ieee;
3494 * It seems that the antenna field in the phy flags value
3495 * is actually a bitfield. This is undefined by radiotap,
3496 * it wants an actual antenna number but I always get "7"
3497 * for most legacy frames I receive indicating that the
3498 * same frame was received on all three RX chains.
3500 * I think this field should be removed in favour of a
3501 * new 802.11n radiotap field "RX chains" that is defined
3504 antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
3505 iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
3507 /* set the preamble flag if appropriate */
3508 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3509 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3511 stats->flag |= RX_FLAG_RADIOTAP;
3514 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
3516 /* 0 - mgmt, 1 - cnt, 2 - data */
3517 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
3518 priv->rx_stats[idx].cnt++;
3519 priv->rx_stats[idx].bytes += len;
3522 static u32 iwl4965_translate_rx_status(u32 decrypt_in)
3524 u32 decrypt_out = 0;
3526 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
3527 RX_RES_STATUS_STATION_FOUND)
3528 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
3529 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
3531 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
3533 /* packet was not encrypted */
3534 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3535 RX_RES_STATUS_SEC_TYPE_NONE)
3538 /* packet was encrypted with unknown alg */
3539 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
3540 RX_RES_STATUS_SEC_TYPE_ERR)
3543 /* decryption was not done in HW */
3544 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
3545 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
3548 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
3550 case RX_RES_STATUS_SEC_TYPE_CCMP:
3551 /* alg is CCM: check MIC only */
3552 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
3554 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3556 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3560 case RX_RES_STATUS_SEC_TYPE_TKIP:
3561 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
3563 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
3566 /* fall through if TTAK OK */
3568 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
3569 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
3571 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
3575 IWL_DEBUG_RX("decrypt_in:0x%x decrypt_out = 0x%x\n",
3576 decrypt_in, decrypt_out);
3581 static void iwl4965_handle_data_packet(struct iwl_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;
3594 u32 ampdu_status_legacy;
3596 if (!include_phy && priv->last_phy_res[0])
3597 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3600 IWL_ERROR("MPDU frame without a PHY data\n");
3604 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
3605 rx_start->cfg_phy_cnt);
3607 len = le16_to_cpu(rx_start->byte_count);
3609 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
3610 sizeof(struct iwl4965_rx_phy_res) +
3611 rx_start->cfg_phy_cnt + len);
3614 struct iwl4965_rx_mpdu_res_start *amsdu =
3615 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3617 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
3618 sizeof(struct iwl4965_rx_mpdu_res_start));
3619 len = le16_to_cpu(amsdu->byte_count);
3620 rx_start->byte_count = amsdu->byte_count;
3621 rx_end = (__le32 *) (((u8 *) hdr) + len);
3623 if (len > priv->hw_params.max_pkt_size || len < 16) {
3624 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
3628 ampdu_status = le32_to_cpu(*rx_end);
3629 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
3632 /* New status scheme, need to translate */
3633 ampdu_status_legacy = ampdu_status;
3634 ampdu_status = iwl4965_translate_rx_status(ampdu_status);
3637 /* start from MAC */
3638 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
3639 skb_put(rxb->skb, len); /* end where data ends */
3641 /* We only process data packets if the interface is open */
3642 if (unlikely(!priv->is_open)) {
3643 IWL_DEBUG_DROP_LIMIT
3644 ("Dropping packet while interface is not open.\n");
3649 hdr = (struct ieee80211_hdr *)rxb->skb->data;
3651 if (priv->cfg->mod_params->hw_crypto)
3652 iwl4965_set_decrypted_flag(priv, rxb->skb, ampdu_status, stats);
3654 if (priv->add_radiotap)
3655 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
3657 iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
3658 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3659 priv->alloc_rxb_skb--;
3663 /* Calc max signal level (dBm) among 3 possible receivers */
3664 static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
3666 /* data from PHY/DSP regarding signal strength, etc.,
3667 * contents are always there, not configurable by host. */
3668 struct iwl4965_rx_non_cfg_phy *ncphy =
3669 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
3670 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
3673 u32 valid_antennae =
3674 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
3675 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
3679 /* Find max rssi among 3 possible receivers.
3680 * These values are measured by the digital signal processor (DSP).
3681 * They should stay fairly constant even as the signal strength varies,
3682 * if the radio's automatic gain control (AGC) is working right.
3683 * AGC value (see below) will provide the "interesting" info. */
3684 for (i = 0; i < 3; i++)
3685 if (valid_antennae & (1 << i))
3686 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
3688 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
3689 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
3692 /* dBm = max_rssi dB - agc dB - constant.
3693 * Higher AGC (higher radio gain) means lower signal. */
3694 return (max_rssi - agc - IWL_RSSI_OFFSET);
3697 #ifdef CONFIG_IWL4965_HT
3699 void iwl4965_init_ht_hw_capab(struct iwl_priv *priv,
3700 struct ieee80211_ht_info *ht_info,
3701 enum ieee80211_band band)
3704 memset(ht_info->supp_mcs_set, 0, 16);
3706 ht_info->ht_supported = 1;
3708 if (band == IEEE80211_BAND_5GHZ) {
3709 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
3710 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
3711 ht_info->supp_mcs_set[4] = 0x01;
3713 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
3714 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
3715 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
3716 (IWL_MIMO_PS_NONE << 2));
3718 if (priv->cfg->mod_params->amsdu_size_8K)
3719 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
3721 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3722 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3724 ht_info->supp_mcs_set[0] = 0xFF;
3725 ht_info->supp_mcs_set[1] = 0xFF;
3727 #endif /* CONFIG_IWL4965_HT */
3729 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
3731 unsigned long flags;
3733 spin_lock_irqsave(&priv->sta_lock, flags);
3734 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
3735 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
3736 priv->stations[sta_id].sta.sta.modify_mask = 0;
3737 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3738 spin_unlock_irqrestore(&priv->sta_lock, flags);
3740 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3743 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
3745 /* FIXME: need locking over ps_status ??? */
3746 u8 sta_id = iwl4965_hw_find_station(priv, addr);
3748 if (sta_id != IWL_INVALID_STATION) {
3749 u8 sta_awake = priv->stations[sta_id].
3750 ps_status == STA_PS_STATUS_WAKE;
3752 if (sta_awake && ps_bit)
3753 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
3754 else if (!sta_awake && !ps_bit) {
3755 iwl4965_sta_modify_ps_wake(priv, sta_id);
3756 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
3760 #ifdef CONFIG_IWLWIFI_DEBUG
3763 * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
3765 * You may hack this function to show different aspects of received frames,
3766 * including selective frame dumps.
3767 * group100 parameter selects whether to show 1 out of 100 good frames.
3769 * TODO: This was originally written for 3945, need to audit for
3770 * proper operation with 4965.
3772 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3773 struct iwl4965_rx_packet *pkt,
3774 struct ieee80211_hdr *header, int group100)
3777 u32 print_summary = 0;
3778 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
3795 struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
3796 struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
3797 struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
3798 u8 *data = IWL_RX_DATA(pkt);
3800 if (likely(!(iwl_debug_level & IWL_DL_RX)))
3804 fc = le16_to_cpu(header->frame_control);
3805 seq_ctl = le16_to_cpu(header->seq_ctrl);
3808 channel = le16_to_cpu(rx_hdr->channel);
3809 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
3810 rate_sym = rx_hdr->rate;
3811 length = le16_to_cpu(rx_hdr->len);
3813 /* end-of-frame status and timestamp */
3814 status = le32_to_cpu(rx_end->status);
3815 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
3816 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
3817 tsf = le64_to_cpu(rx_end->timestamp);
3819 /* signal statistics */
3820 rssi = rx_stats->rssi;
3821 agc = rx_stats->agc;
3822 sig_avg = le16_to_cpu(rx_stats->sig_avg);
3823 noise_diff = le16_to_cpu(rx_stats->noise_diff);
3825 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
3827 /* if data frame is to us and all is good,
3828 * (optionally) print summary for only 1 out of every 100 */
3829 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
3830 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
3833 print_summary = 1; /* print each frame */
3834 else if (priv->framecnt_to_us < 100) {
3835 priv->framecnt_to_us++;
3838 priv->framecnt_to_us = 0;
3843 /* print summary for all other frames */
3847 if (print_summary) {
3853 title = "100Frames";
3854 else if (fc & IEEE80211_FCTL_RETRY)
3856 else if (ieee80211_is_assoc_response(fc))
3858 else if (ieee80211_is_reassoc_response(fc))
3860 else if (ieee80211_is_probe_response(fc)) {
3862 print_dump = 1; /* dump frame contents */
3863 } else if (ieee80211_is_beacon(fc)) {
3865 print_dump = 1; /* dump frame contents */
3866 } else if (ieee80211_is_atim(fc))
3868 else if (ieee80211_is_auth(fc))
3870 else if (ieee80211_is_deauth(fc))
3872 else if (ieee80211_is_disassoc(fc))
3877 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
3878 if (unlikely(rate_idx == -1))
3881 bitrate = iwl4965_rates[rate_idx].ieee / 2;
3883 /* print frame summary.
3884 * MAC addresses show just the last byte (for brevity),
3885 * but you can hack it to show more, if you'd like to. */
3887 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
3888 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
3889 title, fc, header->addr1[5],
3890 length, rssi, channel, bitrate);
3892 /* src/dst addresses assume managed mode */
3893 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
3894 "src=0x%02x, rssi=%u, tim=%lu usec, "
3895 "phy=0x%02x, chnl=%d\n",
3896 title, fc, header->addr1[5],
3897 header->addr3[5], rssi,
3898 tsf_low - priv->scan_start_tsf,
3899 phy_flags, channel);
3903 iwl_print_hex_dump(IWL_DL_RX, data, length);
3906 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
3907 struct iwl4965_rx_packet *pkt,
3908 struct ieee80211_hdr *header,
3916 /* Called for REPLY_RX (legacy ABG frames), or
3917 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
3918 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
3919 struct iwl4965_rx_mem_buffer *rxb)
3921 struct ieee80211_hdr *header;
3922 struct ieee80211_rx_status rx_status;
3923 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3924 /* Use phy data (Rx signal strength, etc.) contained within
3925 * this rx packet for legacy frames,
3926 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
3927 int include_phy = (pkt->hdr.cmd == REPLY_RX);
3928 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
3929 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
3930 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
3932 unsigned int len = 0;
3936 rx_status.mactime = le64_to_cpu(rx_start->timestamp);
3938 ieee80211_frequency_to_channel(le16_to_cpu(rx_start->channel));
3939 rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
3940 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
3941 rx_status.rate_idx =
3942 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
3943 if (rx_status.band == IEEE80211_BAND_5GHZ)
3944 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
3946 rx_status.antenna = 0;
3949 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
3950 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
3951 rx_start->cfg_phy_cnt);
3956 if (priv->last_phy_res[0])
3957 rx_start = (struct iwl4965_rx_phy_res *)
3958 &priv->last_phy_res[1];
3964 IWL_ERROR("MPDU frame without a PHY data\n");
3969 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
3970 + rx_start->cfg_phy_cnt);
3972 len = le16_to_cpu(rx_start->byte_count);
3973 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
3974 sizeof(struct iwl4965_rx_phy_res) + len);
3976 struct iwl4965_rx_mpdu_res_start *amsdu =
3977 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
3979 header = (void *)(pkt->u.raw +
3980 sizeof(struct iwl4965_rx_mpdu_res_start));
3981 len = le16_to_cpu(amsdu->byte_count);
3982 rx_end = (__le32 *) (pkt->u.raw +
3983 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
3986 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
3987 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
3988 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
3989 le32_to_cpu(*rx_end));
3993 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
3995 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
3996 rx_status.ssi = iwl4965_calc_rssi(rx_start);
3998 /* Meaningful noise values are available only from beacon statistics,
3999 * which are gathered only when associated, and indicate noise
4000 * only for the associated network channel ...
4001 * Ignore these noise values while scanning (other channels) */
4002 if (iwl_is_associated(priv) &&
4003 !test_bit(STATUS_SCANNING, &priv->status)) {
4004 rx_status.noise = priv->last_rx_noise;
4005 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi,
4008 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4009 rx_status.signal = iwl4965_calc_sig_qual(rx_status.ssi, 0);
4012 /* Reset beacon noise level if not associated. */
4013 if (!iwl_is_associated(priv))
4014 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
4016 /* Set "1" to report good data frames in groups of 100 */
4017 /* FIXME: need to optimze the call: */
4018 iwl4965_dbg_report_frame(priv, pkt, header, 1);
4020 IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
4021 rx_status.ssi, rx_status.noise, rx_status.signal,
4022 (unsigned long long)rx_status.mactime);
4024 network_packet = iwl4965_is_network_packet(priv, header);
4025 if (network_packet) {
4026 priv->last_rx_rssi = rx_status.ssi;
4027 priv->last_beacon_time = priv->ucode_beacon_time;
4028 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
4031 fc = le16_to_cpu(header->frame_control);
4032 switch (fc & IEEE80211_FCTL_FTYPE) {
4033 case IEEE80211_FTYPE_MGMT:
4034 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4035 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4037 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
4040 case IEEE80211_FTYPE_CTL:
4041 #ifdef CONFIG_IWL4965_HT
4042 switch (fc & IEEE80211_FCTL_STYPE) {
4043 case IEEE80211_STYPE_BACK_REQ:
4044 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
4045 iwl4965_handle_data_packet(priv, 0, include_phy,
4054 case IEEE80211_FTYPE_DATA: {
4055 DECLARE_MAC_BUF(mac1);
4056 DECLARE_MAC_BUF(mac2);
4057 DECLARE_MAC_BUF(mac3);
4059 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
4060 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
4063 if (unlikely(!network_packet))
4064 IWL_DEBUG_DROP("Dropping (non network): "
4066 print_mac(mac1, header->addr1),
4067 print_mac(mac2, header->addr2),
4068 print_mac(mac3, header->addr3));
4069 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
4070 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
4071 print_mac(mac1, header->addr1),
4072 print_mac(mac2, header->addr2),
4073 print_mac(mac3, header->addr3));
4075 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
4085 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
4086 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
4087 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
4088 struct iwl4965_rx_mem_buffer *rxb)
4090 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4091 priv->last_phy_res[0] = 1;
4092 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
4093 sizeof(struct iwl4965_rx_phy_res));
4095 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
4096 struct iwl4965_rx_mem_buffer *rxb)
4099 #ifdef CONFIG_IWL4965_SENSITIVITY
4100 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4101 struct iwl4965_missed_beacon_notif *missed_beacon;
4103 missed_beacon = &pkt->u.missed_beacon;
4104 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
4105 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
4106 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
4107 le32_to_cpu(missed_beacon->total_missed_becons),
4108 le32_to_cpu(missed_beacon->num_recvd_beacons),
4109 le32_to_cpu(missed_beacon->num_expected_beacons));
4110 priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
4111 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)))
4112 queue_work(priv->workqueue, &priv->sensitivity_work);
4114 #endif /*CONFIG_IWL4965_SENSITIVITY*/
4116 #ifdef CONFIG_IWL4965_HT
4119 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
4121 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
4122 int sta_id, int tid)
4124 unsigned long flags;
4126 /* Remove "disable" flag, to enable Tx for this TID */
4127 spin_lock_irqsave(&priv->sta_lock, flags);
4128 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
4129 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
4130 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4131 spin_unlock_irqrestore(&priv->sta_lock, flags);
4133 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4137 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
4139 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
4140 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
4142 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
4143 struct iwl4965_ht_agg *agg,
4144 struct iwl4965_compressed_ba_resp*
4149 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
4150 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4153 struct ieee80211_tx_status *tx_status;
4155 if (unlikely(!agg->wait_for_ba)) {
4156 IWL_ERROR("Received BA when not expected\n");
4160 /* Mark that the expected block-ack response arrived */
4161 agg->wait_for_ba = 0;
4162 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
4164 /* Calculate shift to align block-ack bits with our Tx window bits */
4165 sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
4166 if (sh < 0) /* tbw something is wrong with indices */
4169 /* don't use 64-bit values for now */
4170 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
4172 if (agg->frame_count > (64 - sh)) {
4173 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
4177 /* check for success or failure according to the
4178 * transmitted bitmap and block-ack bitmap */
4179 bitmap &= agg->bitmap;
4181 /* For each frame attempted in aggregation,
4182 * update driver's record of tx frame's status. */
4183 for (i = 0; i < agg->frame_count ; i++) {
4184 ack = bitmap & (1 << i);
4186 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
4187 ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
4188 agg->start_idx + i);
4191 tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
4192 tx_status->flags = IEEE80211_TX_STATUS_ACK;
4193 tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
4194 tx_status->ampdu_ack_map = successes;
4195 tx_status->ampdu_ack_len = agg->frame_count;
4196 iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
4197 &tx_status->control);
4199 IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
4205 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
4207 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
4210 /* Simply stop the queue, but don't change any configuration;
4211 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
4212 iwl_write_prph(priv,
4213 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
4214 (0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
4215 (1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
4219 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
4220 * priv->lock must be held by the caller
4222 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
4223 u16 ssn_idx, u8 tx_fifo)
4227 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
4228 IWL_WARNING("queue number too small: %d, must be > %d\n",
4229 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4233 ret = iwl_grab_nic_access(priv);
4237 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4239 iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4241 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4242 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4243 /* supposes that ssn_idx is valid (!= 0xFFF) */
4244 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4246 iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
4247 iwl4965_txq_ctx_deactivate(priv, txq_id);
4248 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
4250 iwl_release_nic_access(priv);
4255 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
4258 struct iwl4965_queue *q = &priv->txq[txq_id].q;
4259 u8 *addr = priv->stations[sta_id].sta.sta.addr;
4260 struct iwl4965_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
4262 switch (priv->stations[sta_id].tid[tid].agg.state) {
4263 case IWL_EMPTYING_HW_QUEUE_DELBA:
4264 /* We are reclaiming the last packet of the */
4265 /* aggregated HW queue */
4266 if (txq_id == tid_data->agg.txq_id &&
4267 q->read_ptr == q->write_ptr) {
4268 u16 ssn = SEQ_TO_SN(tid_data->seq_number);
4269 int tx_fifo = default_tid_to_tx_fifo[tid];
4270 IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
4271 iwl4965_tx_queue_agg_disable(priv, txq_id,
4273 tid_data->agg.state = IWL_AGG_OFF;
4274 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4277 case IWL_EMPTYING_HW_QUEUE_ADDBA:
4278 /* We are reclaiming the last packet of the queue */
4279 if (tid_data->tfds_in_queue == 0) {
4280 IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
4281 tid_data->agg.state = IWL_AGG_ON;
4282 ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
4290 * iwl4965_queue_dec_wrap - Decrement queue index, wrap back to end if needed
4291 * @index -- current index
4292 * @n_bd -- total number of entries in queue (s/b power of 2)
4294 static inline int iwl4965_queue_dec_wrap(int index, int n_bd)
4296 return (index == 0) ? n_bd - 1 : index - 1;
4300 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
4302 * Handles block-acknowledge notification from device, which reports success
4303 * of frames sent via aggregation.
4305 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
4306 struct iwl4965_rx_mem_buffer *rxb)
4308 struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
4309 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
4311 struct iwl4965_tx_queue *txq = NULL;
4312 struct iwl4965_ht_agg *agg;
4313 DECLARE_MAC_BUF(mac);
4315 /* "flow" corresponds to Tx queue */
4316 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
4318 /* "ssn" is start of block-ack Tx window, corresponds to index
4319 * (in Tx queue's circular buffer) of first TFD/frame in window */
4320 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
4322 if (scd_flow >= ARRAY_SIZE(priv->txq)) {
4323 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
4327 txq = &priv->txq[scd_flow];
4328 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
4330 /* Find index just before block-ack window */
4331 index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
4333 /* TODO: Need to get this copy more safely - now good for debug */
4335 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
4338 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
4340 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
4341 "%d, scd_ssn = %d\n",
4344 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
4347 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
4349 (unsigned long long)agg->bitmap);
4351 /* Update driver's record of ACK vs. not for each frame in window */
4352 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
4354 /* Release all TFDs before the SSN, i.e. all TFDs in front of
4355 * block-ack window (we assume that they've been successfully
4356 * transmitted ... if not, it's too late anyway). */
4357 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
4358 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
4359 priv->stations[ba_resp->sta_id].
4360 tid[ba_resp->tid].tfds_in_queue -= freed;
4361 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
4362 priv->mac80211_registered &&
4363 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
4364 ieee80211_wake_queue(priv->hw, scd_flow);
4365 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
4366 ba_resp->tid, scd_flow);
4371 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
4373 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
4380 scd_q2ratid = ra_tid & SCD_QUEUE_RA_TID_MAP_RATID_MSK;
4382 tbl_dw_addr = priv->scd_base_addr +
4383 SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
4385 tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
4388 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
4390 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
4392 iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
4399 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
4401 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
4402 * i.e. it must be one of the higher queues used for aggregation
4404 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
4405 int tx_fifo, int sta_id, int tid,
4408 unsigned long flags;
4412 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
4413 IWL_WARNING("queue number too small: %d, must be > %d\n",
4414 txq_id, IWL_BACK_QUEUE_FIRST_ID);
4416 ra_tid = BUILD_RAxTID(sta_id, tid);
4418 /* Modify device's station table to Tx this TID */
4419 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
4421 spin_lock_irqsave(&priv->lock, flags);
4422 rc = iwl_grab_nic_access(priv);
4424 spin_unlock_irqrestore(&priv->lock, flags);
4428 /* Stop this Tx queue before configuring it */
4429 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
4431 /* Map receiver-address / traffic-ID to this queue */
4432 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
4434 /* Set this queue as a chain-building queue */
4435 iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
4437 /* Place first TFD at index corresponding to start sequence number.
4438 * Assumes that ssn_idx is valid (!= 0xFFF) */
4439 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
4440 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
4441 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
4443 /* Set up Tx window size and frame limit for this queue */
4444 iwl_write_targ_mem(priv,
4445 priv->scd_base_addr + SCD_CONTEXT_QUEUE_OFFSET(txq_id),
4446 (SCD_WIN_SIZE << SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
4447 SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
4449 iwl_write_targ_mem(priv, priv->scd_base_addr +
4450 SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
4451 (SCD_FRAME_LIMIT << SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
4452 & SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
4454 iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
4456 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
4457 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
4459 iwl_release_nic_access(priv);
4460 spin_unlock_irqrestore(&priv->lock, flags);
4465 #endif /* CONFIG_IWL4965_HT */
4468 * iwl4965_add_station - Initialize a station's hardware rate table
4470 * The uCode's station table contains a table of fallback rates
4471 * for automatic fallback during transmission.
4473 * NOTE: This sets up a default set of values. These will be replaced later
4474 * if the driver's iwl-4965-rs rate scaling algorithm is used, instead of
4477 * NOTE: Run REPLY_ADD_STA command to set up station table entry, before
4478 * calling this function (which runs REPLY_TX_LINK_QUALITY_CMD,
4479 * which requires station table entry to exist).
4481 void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
4484 struct iwl4965_link_quality_cmd link_cmd = {
4489 /* Set up the rate scaling to start at selected rate, fall back
4490 * all the way down to 1M in IEEE order, and then spin on 1M */
4492 r = IWL_RATE_54M_INDEX;
4493 else if (priv->band == IEEE80211_BAND_5GHZ)
4494 r = IWL_RATE_6M_INDEX;
4496 r = IWL_RATE_1M_INDEX;
4498 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
4500 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
4501 rate_flags |= RATE_MCS_CCK_MSK;
4503 /* Use Tx antenna B only */
4504 rate_flags |= RATE_MCS_ANT_B_MSK;
4505 rate_flags &= ~RATE_MCS_ANT_A_MSK;
4507 link_cmd.rs_table[i].rate_n_flags =
4508 iwl4965_hw_set_rate_n_flags(iwl4965_rates[r].plcp, rate_flags);
4509 r = iwl4965_get_prev_ieee_rate(r);
4512 link_cmd.general_params.single_stream_ant_msk = 2;
4513 link_cmd.general_params.dual_stream_ant_msk = 3;
4514 link_cmd.agg_params.agg_dis_start_th = 3;
4515 link_cmd.agg_params.agg_time_limit = cpu_to_le16(4000);
4517 /* Update the rate scaling for control frame Tx to AP */
4518 link_cmd.sta_id = is_ap ? IWL_AP_ID : priv->hw_params.bcast_sta_id;
4520 iwl_send_cmd_pdu_async(priv, REPLY_TX_LINK_QUALITY_CMD,
4521 sizeof(link_cmd), &link_cmd, NULL);
4524 #ifdef CONFIG_IWL4965_HT
4526 static u8 iwl4965_is_channel_extension(struct iwl_priv *priv,
4527 enum ieee80211_band band,
4528 u16 channel, u8 extension_chan_offset)
4530 const struct iwl_channel_info *ch_info;
4532 ch_info = iwl_get_channel_info(priv, band, channel);
4533 if (!is_channel_valid(ch_info))
4536 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
4539 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
4540 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
4546 static u8 iwl4965_is_fat_tx_allowed(struct iwl_priv *priv,
4547 struct ieee80211_ht_info *sta_ht_inf)
4549 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
4551 if ((!iwl_ht_conf->is_ht) ||
4552 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
4553 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
4557 if ((!sta_ht_inf->ht_supported) ||
4558 (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
4562 return (iwl4965_is_channel_extension(priv, priv->band,
4563 iwl_ht_conf->control_channel,
4564 iwl_ht_conf->extension_chan_offset));
4567 void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
4569 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
4572 if (!ht_info->is_ht)
4575 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
4576 if (iwl4965_is_fat_tx_allowed(priv, NULL))
4577 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4579 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
4580 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
4582 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
4583 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
4584 le16_to_cpu(rxon->channel),
4585 ht_info->control_channel);
4586 rxon->channel = cpu_to_le16(ht_info->control_channel);
4590 /* Note: control channel is opposite of extension channel */
4591 switch (ht_info->extension_chan_offset) {
4592 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
4593 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
4595 case IWL_EXT_CHANNEL_OFFSET_BELOW:
4596 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
4598 case IWL_EXT_CHANNEL_OFFSET_NONE:
4600 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
4604 val = ht_info->ht_protection;
4606 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
4608 iwl4965_set_rxon_chain(priv);
4610 IWL_DEBUG_ASSOC("supported HT rate 0x%X %X "
4611 "rxon flags 0x%X operation mode :0x%X "
4612 "extension channel offset 0x%x "
4613 "control chan %d\n",
4614 ht_info->supp_mcs_set[0], ht_info->supp_mcs_set[1],
4615 le32_to_cpu(rxon->flags), ht_info->ht_protection,
4616 ht_info->extension_chan_offset,
4617 ht_info->control_channel);
4621 void iwl4965_set_ht_add_station(struct iwl_priv *priv, u8 index,
4622 struct ieee80211_ht_info *sta_ht_inf)
4627 if (!sta_ht_inf || !sta_ht_inf->ht_supported)
4630 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2;
4632 sta_flags = priv->stations[index].sta.station_flags;
4634 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
4636 switch (mimo_ps_mode) {
4637 case WLAN_HT_CAP_MIMO_PS_STATIC:
4638 sta_flags |= STA_FLG_MIMO_DIS_MSK;
4640 case WLAN_HT_CAP_MIMO_PS_DYNAMIC:
4641 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
4643 case WLAN_HT_CAP_MIMO_PS_DISABLED:
4646 IWL_WARNING("Invalid MIMO PS mode %d", mimo_ps_mode);
4650 sta_flags |= cpu_to_le32(
4651 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
4653 sta_flags |= cpu_to_le32(
4654 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
4656 if (iwl4965_is_fat_tx_allowed(priv, sta_ht_inf))
4657 sta_flags |= STA_FLG_FAT_EN_MSK;
4659 sta_flags &= ~STA_FLG_FAT_EN_MSK;
4661 priv->stations[index].sta.station_flags = sta_flags;
4666 static void iwl4965_sta_modify_add_ba_tid(struct iwl_priv *priv,
4667 int sta_id, int tid, u16 ssn)
4669 unsigned long flags;
4671 spin_lock_irqsave(&priv->sta_lock, flags);
4672 priv->stations[sta_id].sta.station_flags_msk = 0;
4673 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
4674 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
4675 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
4676 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4677 spin_unlock_irqrestore(&priv->sta_lock, flags);
4679 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4682 static void iwl4965_sta_modify_del_ba_tid(struct iwl_priv *priv,
4683 int sta_id, int tid)
4685 unsigned long flags;
4687 spin_lock_irqsave(&priv->sta_lock, flags);
4688 priv->stations[sta_id].sta.station_flags_msk = 0;
4689 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
4690 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
4691 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
4692 spin_unlock_irqrestore(&priv->sta_lock, flags);
4694 iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
4698 * Find first available (lowest unused) Tx Queue, mark it "active".
4699 * Called only when finding queue for aggregation.
4700 * Should never return anything < 7, because they should already
4701 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
4703 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
4707 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
4708 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
4713 static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
4714 u16 tid, u16 *start_seq_num)
4716 struct iwl_priv *priv = hw->priv;
4722 unsigned long flags;
4723 struct iwl4965_tid_data *tid_data;
4724 DECLARE_MAC_BUF(mac);
4726 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4727 tx_fifo = default_tid_to_tx_fifo[tid];
4731 IWL_WARNING("%s on da = %s tid = %d\n",
4732 __func__, print_mac(mac, da), tid);
4734 sta_id = iwl4965_hw_find_station(priv, da);
4735 if (sta_id == IWL_INVALID_STATION)
4738 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
4739 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
4743 txq_id = iwl4965_txq_ctx_activate_free(priv);
4747 spin_lock_irqsave(&priv->sta_lock, flags);
4748 tid_data = &priv->stations[sta_id].tid[tid];
4749 ssn = SEQ_TO_SN(tid_data->seq_number);
4750 tid_data->agg.txq_id = txq_id;
4751 spin_unlock_irqrestore(&priv->sta_lock, flags);
4753 *start_seq_num = ssn;
4754 ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
4760 if (tid_data->tfds_in_queue == 0) {
4761 printk(KERN_ERR "HW queue is empty\n");
4762 tid_data->agg.state = IWL_AGG_ON;
4763 ieee80211_start_tx_ba_cb_irqsafe(hw, da, tid);
4765 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
4766 tid_data->tfds_in_queue);
4767 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
4772 static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
4776 struct iwl_priv *priv = hw->priv;
4777 int tx_fifo_id, txq_id, sta_id, ssn = -1;
4778 struct iwl4965_tid_data *tid_data;
4779 int ret, write_ptr, read_ptr;
4780 unsigned long flags;
4781 DECLARE_MAC_BUF(mac);
4784 IWL_ERROR("da = NULL\n");
4788 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
4789 tx_fifo_id = default_tid_to_tx_fifo[tid];
4793 sta_id = iwl4965_hw_find_station(priv, da);
4795 if (sta_id == IWL_INVALID_STATION)
4798 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
4799 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
4801 tid_data = &priv->stations[sta_id].tid[tid];
4802 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
4803 txq_id = tid_data->agg.txq_id;
4804 write_ptr = priv->txq[txq_id].q.write_ptr;
4805 read_ptr = priv->txq[txq_id].q.read_ptr;
4807 /* The queue is not empty */
4808 if (write_ptr != read_ptr) {
4809 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
4810 priv->stations[sta_id].tid[tid].agg.state =
4811 IWL_EMPTYING_HW_QUEUE_DELBA;
4815 IWL_DEBUG_HT("HW queue empty\n");;
4816 priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
4818 spin_lock_irqsave(&priv->lock, flags);
4819 ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
4820 spin_unlock_irqrestore(&priv->lock, flags);
4825 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
4827 IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
4828 print_mac(mac, da), tid);
4833 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
4834 enum ieee80211_ampdu_mlme_action action,
4835 const u8 *addr, u16 tid, u16 *ssn)
4837 struct iwl_priv *priv = hw->priv;
4839 DECLARE_MAC_BUF(mac);
4841 IWL_DEBUG_HT("A-MPDU action on da=%s tid=%d ",
4842 print_mac(mac, addr), tid);
4843 sta_id = iwl4965_hw_find_station(priv, addr);
4845 case IEEE80211_AMPDU_RX_START:
4846 IWL_DEBUG_HT("start Rx\n");
4847 iwl4965_sta_modify_add_ba_tid(priv, sta_id, tid, *ssn);
4849 case IEEE80211_AMPDU_RX_STOP:
4850 IWL_DEBUG_HT("stop Rx\n");
4851 iwl4965_sta_modify_del_ba_tid(priv, sta_id, tid);
4853 case IEEE80211_AMPDU_TX_START:
4854 IWL_DEBUG_HT("start Tx\n");
4855 return iwl4965_mac_ht_tx_agg_start(hw, addr, tid, ssn);
4856 case IEEE80211_AMPDU_TX_STOP:
4857 IWL_DEBUG_HT("stop Tx\n");
4858 return iwl4965_mac_ht_tx_agg_stop(hw, addr, tid);
4860 IWL_DEBUG_HT("unknown\n");
4867 #endif /* CONFIG_IWL4965_HT */
4869 /* Set up 4965-specific Rx frame reply handlers */
4870 void iwl4965_hw_rx_handler_setup(struct iwl_priv *priv)
4872 /* Legacy Rx frames */
4873 priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
4875 /* High-throughput (HT) Rx frames */
4876 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
4877 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
4879 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
4880 iwl4965_rx_missed_beacon_notif;
4882 #ifdef CONFIG_IWL4965_HT
4883 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
4884 #endif /* CONFIG_IWL4965_HT */
4887 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
4889 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
4890 #ifdef CONFIG_IWL4965_SENSITIVITY
4891 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
4893 init_timer(&priv->statistics_periodic);
4894 priv->statistics_periodic.data = (unsigned long)priv;
4895 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
4898 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
4900 del_timer_sync(&priv->statistics_periodic);
4902 cancel_delayed_work(&priv->init_alive_start);
4905 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
4906 .enqueue_hcmd = iwl4965_enqueue_hcmd,
4909 static struct iwl_lib_ops iwl4965_lib = {
4910 .init_drv = iwl4965_init_drv,
4911 .set_hw_params = iwl4965_hw_set_hw_params,
4912 .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
4913 .hw_nic_init = iwl4965_hw_nic_init,
4914 .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
4915 .alive_notify = iwl4965_alive_notify,
4916 .load_ucode = iwl4965_load_bsm,
4918 .verify_signature = iwlcore_eeprom_verify_signature,
4919 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
4920 .release_semaphore = iwlcore_eeprom_release_semaphore,
4922 .radio_kill_sw = iwl4965_radio_kill_sw,
4925 static struct iwl_ops iwl4965_ops = {
4926 .lib = &iwl4965_lib,
4927 .utils = &iwl4965_hcmd_utils,
4930 static struct iwl_cfg iwl4965_agn_cfg = {
4932 .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
4933 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
4934 .ops = &iwl4965_ops,
4935 .mod_params = &iwl4965_mod_params,
4938 struct pci_device_id iwl4965_hw_card_ids[] = {
4939 {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4940 {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4944 MODULE_DEVICE_TABLE(pci, iwl4965_hw_card_ids);
4946 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
4947 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
4948 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
4949 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
4950 module_param_named(hwcrypto, iwl4965_mod_params.hw_crypto, int, 0444);
4951 MODULE_PARM_DESC(hwcrypto,
4952 "using hardware crypto engine (default 0 [software])\n");
4953 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
4954 MODULE_PARM_DESC(debug, "debug output mask");
4956 disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
4957 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
4959 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
4960 MODULE_PARM_DESC(queues_num, "number of hw queues.");
4963 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
4964 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
4965 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
4966 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");