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"
46 #include "iwl-calib.h"
48 /* module parameters */
49 static struct iwl_mod_params iwl4965_mod_params = {
50 .num_of_queues = IWL49_NUM_QUEUES,
54 /* the rest are 0 by default */
57 #ifdef CONFIG_IWL4965_HT
59 static const u16 default_tid_to_tx_fifo[] = {
79 #endif /*CONFIG_IWL4965_HT */
81 /* check contents of special bootstrap uCode SRAM */
82 static int iwl4965_verify_bsm(struct iwl_priv *priv)
84 __le32 *image = priv->ucode_boot.v_addr;
85 u32 len = priv->ucode_boot.len;
89 IWL_DEBUG_INFO("Begin verify bsm\n");
91 /* verify BSM SRAM contents */
92 val = iwl_read_prph(priv, BSM_WR_DWCOUNT_REG);
93 for (reg = BSM_SRAM_LOWER_BOUND;
94 reg < BSM_SRAM_LOWER_BOUND + len;
95 reg += sizeof(u32), image++) {
96 val = iwl_read_prph(priv, reg);
97 if (val != le32_to_cpu(*image)) {
98 IWL_ERROR("BSM uCode verification failed at "
99 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
100 BSM_SRAM_LOWER_BOUND,
101 reg - BSM_SRAM_LOWER_BOUND, len,
102 val, le32_to_cpu(*image));
107 IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
113 * iwl4965_load_bsm - Load bootstrap instructions
117 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
118 * in special SRAM that does not power down during RFKILL. When powering back
119 * up after power-saving sleeps (or during initial uCode load), the BSM loads
120 * the bootstrap program into the on-board processor, and starts it.
122 * The bootstrap program loads (via DMA) instructions and data for a new
123 * program from host DRAM locations indicated by the host driver in the
124 * BSM_DRAM_* registers. Once the new program is loaded, it starts
127 * When initializing the NIC, the host driver points the BSM to the
128 * "initialize" uCode image. This uCode sets up some internal data, then
129 * notifies host via "initialize alive" that it is complete.
131 * The host then replaces the BSM_DRAM_* pointer values to point to the
132 * normal runtime uCode instructions and a backup uCode data cache buffer
133 * (filled initially with starting data values for the on-board processor),
134 * then triggers the "initialize" uCode to load and launch the runtime uCode,
135 * which begins normal operation.
137 * When doing a power-save shutdown, runtime uCode saves data SRAM into
138 * the backup data cache in DRAM before SRAM is powered down.
140 * When powering back up, the BSM loads the bootstrap program. This reloads
141 * the runtime uCode instructions and the backup data cache into SRAM,
142 * and re-launches the runtime uCode from where it left off.
144 static int iwl4965_load_bsm(struct iwl_priv *priv)
146 __le32 *image = priv->ucode_boot.v_addr;
147 u32 len = priv->ucode_boot.len;
157 IWL_DEBUG_INFO("Begin load bsm\n");
159 /* make sure bootstrap program is no larger than BSM's SRAM size */
160 if (len > IWL_MAX_BSM_SIZE)
163 /* Tell bootstrap uCode where to find the "Initialize" uCode
164 * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
165 * NOTE: iwl4965_initialize_alive_start() will replace these values,
166 * after the "initialize" uCode has run, to point to
167 * runtime/protocol instructions and backup data cache. */
168 pinst = priv->ucode_init.p_addr >> 4;
169 pdata = priv->ucode_init_data.p_addr >> 4;
170 inst_len = priv->ucode_init.len;
171 data_len = priv->ucode_init_data.len;
173 ret = iwl_grab_nic_access(priv);
177 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
178 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
179 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
180 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
182 /* Fill BSM memory with bootstrap instructions */
183 for (reg_offset = BSM_SRAM_LOWER_BOUND;
184 reg_offset < BSM_SRAM_LOWER_BOUND + len;
185 reg_offset += sizeof(u32), image++)
186 _iwl_write_prph(priv, reg_offset, le32_to_cpu(*image));
188 ret = iwl4965_verify_bsm(priv);
190 iwl_release_nic_access(priv);
194 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
195 iwl_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
196 iwl_write_prph(priv, BSM_WR_MEM_DST_REG, RTC_INST_LOWER_BOUND);
197 iwl_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
199 /* Load bootstrap code into instruction SRAM now,
200 * to prepare to load "initialize" uCode */
201 iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
203 /* Wait for load of bootstrap uCode to finish */
204 for (i = 0; i < 100; i++) {
205 done = iwl_read_prph(priv, BSM_WR_CTRL_REG);
206 if (!(done & BSM_WR_CTRL_REG_BIT_START))
211 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
213 IWL_ERROR("BSM write did not complete!\n");
217 /* Enable future boot loads whenever power management unit triggers it
218 * (e.g. when powering back up after power-save shutdown) */
219 iwl_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
221 iwl_release_nic_access(priv);
227 * iwl4965_set_ucode_ptrs - Set uCode address location
229 * Tell initialization uCode where to find runtime uCode.
231 * BSM registers initially contain pointers to initialization uCode.
232 * We need to replace them to load runtime uCode inst and data,
233 * and to save runtime data when powering down.
235 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
242 /* bits 35:4 for 4965 */
243 pinst = priv->ucode_code.p_addr >> 4;
244 pdata = priv->ucode_data_backup.p_addr >> 4;
246 spin_lock_irqsave(&priv->lock, flags);
247 ret = iwl_grab_nic_access(priv);
249 spin_unlock_irqrestore(&priv->lock, flags);
253 /* Tell bootstrap uCode where to find image to load */
254 iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
255 iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
256 iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
257 priv->ucode_data.len);
259 /* Inst bytecount must be last to set up, bit 31 signals uCode
260 * that all new ptr/size info is in place */
261 iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
262 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
263 iwl_release_nic_access(priv);
265 spin_unlock_irqrestore(&priv->lock, flags);
267 IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
273 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
275 * Called after REPLY_ALIVE notification received from "initialize" uCode.
277 * The 4965 "initialize" ALIVE reply contains calibration data for:
278 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
279 * (3945 does not contain this data).
281 * Tell "initialize" uCode to go ahead and load the runtime uCode.
283 static void iwl4965_init_alive_start(struct iwl_priv *priv)
285 /* Check alive response for "valid" sign from uCode */
286 if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
287 /* We had an error bringing up the hardware, so take it
288 * all the way back down so we can try again */
289 IWL_DEBUG_INFO("Initialize Alive failed.\n");
293 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
294 * This is a paranoid check, because we would not have gotten the
295 * "initialize" alive if code weren't properly loaded. */
296 if (iwl_verify_ucode(priv)) {
297 /* Runtime instruction load was bad;
298 * take it all the way back down so we can try again */
299 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
303 /* Calculate temperature */
304 priv->temperature = iwl4965_get_temperature(priv);
306 /* Send pointers to protocol/runtime uCode image ... init code will
307 * load and launch runtime uCode, which will send us another "Alive"
309 IWL_DEBUG_INFO("Initialization Alive received.\n");
310 if (iwl4965_set_ucode_ptrs(priv)) {
311 /* Runtime instruction load won't happen;
312 * take it all the way back down so we can try again */
313 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
319 queue_work(priv->workqueue, &priv->restart);
322 static int is_fat_channel(__le32 rxon_flags)
324 return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
325 (rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
328 int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
332 /* 4965 HT rate format */
333 if (rate_n_flags & RATE_MCS_HT_MSK) {
334 idx = (rate_n_flags & 0xff);
336 if (idx >= IWL_RATE_MIMO2_6M_PLCP)
337 idx = idx - IWL_RATE_MIMO2_6M_PLCP;
339 idx += IWL_FIRST_OFDM_RATE;
340 /* skip 9M not supported in ht*/
341 if (idx >= IWL_RATE_9M_INDEX)
343 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
346 /* 4965 legacy rate format, search for match in table */
348 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
349 if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
357 * translate ucode response to mac80211 tx status control values
359 void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
360 struct ieee80211_tx_control *control)
364 control->antenna_sel_tx =
365 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
366 if (rate_n_flags & RATE_MCS_HT_MSK)
367 control->flags |= IEEE80211_TXCTL_OFDM_HT;
368 if (rate_n_flags & RATE_MCS_GF_MSK)
369 control->flags |= IEEE80211_TXCTL_GREEN_FIELD;
370 if (rate_n_flags & RATE_MCS_FAT_MSK)
371 control->flags |= IEEE80211_TXCTL_40_MHZ_WIDTH;
372 if (rate_n_flags & RATE_MCS_DUP_MSK)
373 control->flags |= IEEE80211_TXCTL_DUP_DATA;
374 if (rate_n_flags & RATE_MCS_SGI_MSK)
375 control->flags |= IEEE80211_TXCTL_SHORT_GI;
376 /* since iwl4965_hwrate_to_plcp_idx is band indifferent, we always use
377 * IEEE80211_BAND_2GHZ band as it contains all the rates */
378 rate_index = iwl4965_hwrate_to_plcp_idx(rate_n_flags);
379 if (rate_index == -1)
380 control->tx_rate = NULL;
383 &priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
386 int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
391 spin_lock_irqsave(&priv->lock, flags);
392 rc = iwl_grab_nic_access(priv);
394 spin_unlock_irqrestore(&priv->lock, flags);
399 iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
400 rc = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
403 IWL_ERROR("Can't stop Rx DMA.\n");
405 iwl_release_nic_access(priv);
406 spin_unlock_irqrestore(&priv->lock, flags);
415 static int iwl4965_eeprom_check_version(struct iwl_priv *priv)
420 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
422 calib_ver = iwl_eeprom_query16(priv, EEPROM_4965_CALIB_VERSION_OFFSET);
424 if (eeprom_ver < EEPROM_4965_EEPROM_VERSION ||
425 calib_ver < EEPROM_4965_TX_POWER_VERSION)
430 IWL_ERROR("Unsuported EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
431 eeprom_ver, EEPROM_4965_EEPROM_VERSION,
432 calib_ver, EEPROM_4965_TX_POWER_VERSION);
436 int iwl4965_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
441 spin_lock_irqsave(&priv->lock, flags);
442 ret = iwl_grab_nic_access(priv);
444 spin_unlock_irqrestore(&priv->lock, flags);
448 if (src == IWL_PWR_SRC_VAUX) {
450 ret = pci_read_config_dword(priv->pci_dev, PCI_POWER_SOURCE,
453 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT) {
454 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
455 APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
456 ~APMG_PS_CTRL_MSK_PWR_SRC);
459 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
460 APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
461 ~APMG_PS_CTRL_MSK_PWR_SRC);
464 iwl_release_nic_access(priv);
465 spin_unlock_irqrestore(&priv->lock, flags);
470 static int iwl4965_disable_tx_fifo(struct iwl_priv *priv)
475 spin_lock_irqsave(&priv->lock, flags);
477 ret = iwl_grab_nic_access(priv);
479 IWL_ERROR("Tx fifo reset failed");
480 spin_unlock_irqrestore(&priv->lock, flags);
484 iwl_write_prph(priv, IWL49_SCD_TXFACT, 0);
485 iwl_release_nic_access(priv);
486 spin_unlock_irqrestore(&priv->lock, flags);
491 static int iwl4965_apm_init(struct iwl_priv *priv)
495 iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
496 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
498 /* set "initialization complete" bit to move adapter
499 * D0U* --> D0A* state */
500 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
502 /* wait for clock stabilization */
503 ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
504 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
505 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
507 IWL_DEBUG_INFO("Failed to init the card\n");
511 ret = iwl_grab_nic_access(priv);
516 iwl_write_prph(priv, APMG_CLK_CTRL_REG,
517 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
521 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
522 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
524 iwl_release_nic_access(priv);
530 static void iwl4965_nic_config(struct iwl_priv *priv)
537 spin_lock_irqsave(&priv->lock, flags);
539 if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
540 pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
541 /* Enable No Snoop field */
542 pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,
546 pci_read_config_byte(priv->pci_dev, PCI_LINK_CTRL, &val_link);
548 /* disable L1 entry -- workaround for pre-B1 */
549 pci_write_config_byte(priv->pci_dev, PCI_LINK_CTRL, val_link & ~0x02);
551 radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
553 /* write radio config values to register */
554 if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
555 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
556 EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
557 EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
558 EEPROM_RF_CFG_DASH_MSK(radio_cfg));
560 /* set CSR_HW_CONFIG_REG for uCode use */
561 iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
562 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
563 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
565 priv->calib_info = (struct iwl_eeprom_calib_info *)
566 iwl_eeprom_query_addr(priv, EEPROM_4965_CALIB_TXPOWER_OFFSET);
568 spin_unlock_irqrestore(&priv->lock, flags);
571 int iwl4965_hw_nic_stop_master(struct iwl_priv *priv)
577 spin_lock_irqsave(&priv->lock, flags);
579 /* set stop master bit */
580 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
582 reg_val = iwl_read32(priv, CSR_GP_CNTRL);
584 if (CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE ==
585 (reg_val & CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE))
586 IWL_DEBUG_INFO("Card in power save, master is already "
589 rc = iwl_poll_bit(priv, CSR_RESET,
590 CSR_RESET_REG_FLAG_MASTER_DISABLED,
591 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
593 spin_unlock_irqrestore(&priv->lock, flags);
598 spin_unlock_irqrestore(&priv->lock, flags);
599 IWL_DEBUG_INFO("stop master\n");
605 * iwl4965_hw_txq_ctx_stop - Stop all Tx DMA channels, free Tx queue memory
607 void iwl4965_hw_txq_ctx_stop(struct iwl_priv *priv)
613 /* Stop each Tx DMA channel, and wait for it to be idle */
614 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
615 spin_lock_irqsave(&priv->lock, flags);
616 if (iwl_grab_nic_access(priv)) {
617 spin_unlock_irqrestore(&priv->lock, flags);
621 iwl_write_direct32(priv,
622 FH_TCSR_CHNL_TX_CONFIG_REG(txq_id), 0x0);
623 iwl_poll_direct_bit(priv, FH_TSSR_TX_STATUS_REG,
624 FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE
626 iwl_release_nic_access(priv);
627 spin_unlock_irqrestore(&priv->lock, flags);
630 /* Deallocate memory for all Tx queues */
631 iwl_hw_txq_ctx_free(priv);
634 int iwl4965_hw_nic_reset(struct iwl_priv *priv)
639 iwl4965_hw_nic_stop_master(priv);
641 spin_lock_irqsave(&priv->lock, flags);
643 iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
647 iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
648 rc = iwl_poll_bit(priv, CSR_RESET,
649 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
650 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25);
654 rc = iwl_grab_nic_access(priv);
656 iwl_write_prph(priv, APMG_CLK_EN_REG,
657 APMG_CLK_VAL_DMA_CLK_RQT |
658 APMG_CLK_VAL_BSM_CLK_RQT);
662 iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
663 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
665 iwl_release_nic_access(priv);
668 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
669 wake_up_interruptible(&priv->wait_command_queue);
671 spin_unlock_irqrestore(&priv->lock, flags);
677 #define REG_RECALIB_PERIOD (60)
680 * iwl4965_bg_statistics_periodic - Timer callback to queue statistics
682 * This callback is provided in order to send a statistics request.
684 * This timer function is continually reset to execute within
685 * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
686 * was received. We need to ensure we receive the statistics in order
687 * to update the temperature used for calibrating the TXPOWER.
689 static void iwl4965_bg_statistics_periodic(unsigned long data)
691 struct iwl_priv *priv = (struct iwl_priv *)data;
693 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
696 iwl_send_statistics_request(priv, CMD_ASYNC);
699 void iwl4965_rf_kill_ct_config(struct iwl_priv *priv)
701 struct iwl4965_ct_kill_config cmd;
705 spin_lock_irqsave(&priv->lock, flags);
706 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
707 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
708 spin_unlock_irqrestore(&priv->lock, flags);
710 cmd.critical_temperature_R =
711 cpu_to_le32(priv->hw_params.ct_kill_threshold);
713 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
716 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
718 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
719 "critical temperature is %d\n",
720 cmd.critical_temperature_R);
723 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
725 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
726 * Called after every association, but this runs only once!
727 * ... once chain noise is calibrated the first time, it's good forever. */
728 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
730 struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
732 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
733 struct iwl4965_calibration_cmd cmd;
735 memset(&cmd, 0, sizeof(cmd));
736 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
740 if (iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
742 IWL_ERROR("Could not send REPLY_PHY_CALIBRATION_CMD\n");
743 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
744 IWL_DEBUG_CALIB("Run chain_noise_calibrate\n");
748 static void iwl4965_gain_computation(struct iwl_priv *priv,
750 u16 min_average_noise_antenna_i,
751 u32 min_average_noise)
754 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
756 data->delta_gain_code[min_average_noise_antenna_i] = 0;
758 for (i = 0; i < NUM_RX_CHAINS; i++) {
761 if (!(data->disconn_array[i]) &&
762 (data->delta_gain_code[i] ==
763 CHAIN_NOISE_DELTA_GAIN_INIT_VAL)) {
764 delta_g = average_noise[i] - min_average_noise;
765 data->delta_gain_code[i] = (u8)((delta_g * 10) / 15);
766 data->delta_gain_code[i] =
767 min(data->delta_gain_code[i],
768 (u8) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
770 data->delta_gain_code[i] =
771 (data->delta_gain_code[i] | (1 << 2));
773 data->delta_gain_code[i] = 0;
776 IWL_DEBUG_CALIB("delta_gain_codes: a %d b %d c %d\n",
777 data->delta_gain_code[0],
778 data->delta_gain_code[1],
779 data->delta_gain_code[2]);
781 /* Differential gain gets sent to uCode only once */
782 if (!data->radio_write) {
783 struct iwl4965_calibration_cmd cmd;
784 data->radio_write = 1;
786 memset(&cmd, 0, sizeof(cmd));
787 cmd.opCode = PHY_CALIBRATE_DIFF_GAIN_CMD;
788 cmd.diff_gain_a = data->delta_gain_code[0];
789 cmd.diff_gain_b = data->delta_gain_code[1];
790 cmd.diff_gain_c = data->delta_gain_code[2];
791 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
794 IWL_DEBUG_CALIB("fail sending cmd "
795 "REPLY_PHY_CALIBRATION_CMD \n");
797 /* TODO we might want recalculate
798 * rx_chain in rxon cmd */
800 /* Mark so we run this algo only once! */
801 data->state = IWL_CHAIN_NOISE_CALIBRATED;
803 data->chain_noise_a = 0;
804 data->chain_noise_b = 0;
805 data->chain_noise_c = 0;
806 data->chain_signal_a = 0;
807 data->chain_signal_b = 0;
808 data->chain_signal_c = 0;
809 data->beacon_count = 0;
812 static void iwl4965_bg_sensitivity_work(struct work_struct *work)
814 struct iwl_priv *priv = container_of(work, struct iwl_priv,
817 mutex_lock(&priv->mutex);
819 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
820 test_bit(STATUS_SCANNING, &priv->status)) {
821 mutex_unlock(&priv->mutex);
825 if (priv->start_calib) {
826 iwl_chain_noise_calibration(priv, &priv->statistics);
828 iwl_sensitivity_calibration(priv, &priv->statistics);
831 mutex_unlock(&priv->mutex);
834 #endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/
836 static void iwl4965_bg_txpower_work(struct work_struct *work)
838 struct iwl_priv *priv = container_of(work, struct iwl_priv,
841 /* If a scan happened to start before we got here
842 * then just return; the statistics notification will
843 * kick off another scheduled work to compensate for
844 * any temperature delta we missed here. */
845 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
846 test_bit(STATUS_SCANNING, &priv->status))
849 mutex_lock(&priv->mutex);
851 /* Regardless of if we are assocaited, we must reconfigure the
852 * TX power since frames can be sent on non-radar channels while
854 iwl4965_hw_reg_send_txpower(priv);
856 /* Update last_temperature to keep is_calib_needed from running
857 * when it isn't needed... */
858 priv->last_temperature = priv->temperature;
860 mutex_unlock(&priv->mutex);
864 * Acquire priv->lock before calling this function !
866 static void iwl4965_set_wr_ptrs(struct iwl_priv *priv, int txq_id, u32 index)
868 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
869 (index & 0xff) | (txq_id << 8));
870 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(txq_id), index);
874 * iwl4965_tx_queue_set_status - (optionally) start Tx/Cmd queue
875 * @tx_fifo_id: Tx DMA/FIFO channel (range 0-7) that the queue will feed
876 * @scd_retry: (1) Indicates queue will be used in aggregation mode
878 * NOTE: Acquire priv->lock before calling this function !
880 static void iwl4965_tx_queue_set_status(struct iwl_priv *priv,
881 struct iwl_tx_queue *txq,
882 int tx_fifo_id, int scd_retry)
884 int txq_id = txq->q.id;
886 /* Find out whether to activate Tx queue */
887 int active = test_bit(txq_id, &priv->txq_ctx_active_msk)?1:0;
889 /* Set up and activate */
890 iwl_write_prph(priv, IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
891 (active << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE) |
892 (tx_fifo_id << IWL49_SCD_QUEUE_STTS_REG_POS_TXF) |
893 (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_WSL) |
894 (scd_retry << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK) |
895 IWL49_SCD_QUEUE_STTS_REG_MSK);
897 txq->sched_retry = scd_retry;
899 IWL_DEBUG_INFO("%s %s Queue %d on AC %d\n",
900 active ? "Activate" : "Deactivate",
901 scd_retry ? "BA" : "AC", txq_id, tx_fifo_id);
904 static const u16 default_queue_to_tx_fifo[] = {
914 static inline void iwl4965_txq_ctx_activate(struct iwl_priv *priv, int txq_id)
916 set_bit(txq_id, &priv->txq_ctx_active_msk);
919 static inline void iwl4965_txq_ctx_deactivate(struct iwl_priv *priv, int txq_id)
921 clear_bit(txq_id, &priv->txq_ctx_active_msk);
924 int iwl4965_alive_notify(struct iwl_priv *priv)
931 spin_lock_irqsave(&priv->lock, flags);
933 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
934 memset(&(priv->sensitivity_data), 0,
935 sizeof(struct iwl_sensitivity_data));
936 memset(&(priv->chain_noise_data), 0,
937 sizeof(struct iwl_chain_noise_data));
938 for (i = 0; i < NUM_RX_CHAINS; i++)
939 priv->chain_noise_data.delta_gain_code[i] =
940 CHAIN_NOISE_DELTA_GAIN_INIT_VAL;
941 #endif /* CONFIG_IWL4965_RUN_TIME_CALIB*/
942 ret = iwl_grab_nic_access(priv);
944 spin_unlock_irqrestore(&priv->lock, flags);
948 /* Clear 4965's internal Tx Scheduler data base */
949 priv->scd_base_addr = iwl_read_prph(priv, IWL49_SCD_SRAM_BASE_ADDR);
950 a = priv->scd_base_addr + IWL49_SCD_CONTEXT_DATA_OFFSET;
951 for (; a < priv->scd_base_addr + IWL49_SCD_TX_STTS_BITMAP_OFFSET; a += 4)
952 iwl_write_targ_mem(priv, a, 0);
953 for (; a < priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET; a += 4)
954 iwl_write_targ_mem(priv, a, 0);
955 for (; a < sizeof(u16) * priv->hw_params.max_txq_num; a += 4)
956 iwl_write_targ_mem(priv, a, 0);
958 /* Tel 4965 where to find Tx byte count tables */
959 iwl_write_prph(priv, IWL49_SCD_DRAM_BASE_ADDR,
961 offsetof(struct iwl4965_shared, queues_byte_cnt_tbls)) >> 10);
963 /* Disable chain mode for all queues */
964 iwl_write_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, 0);
966 /* Initialize each Tx queue (including the command queue) */
967 for (i = 0; i < priv->hw_params.max_txq_num; i++) {
969 /* TFD circular buffer read/write indexes */
970 iwl_write_prph(priv, IWL49_SCD_QUEUE_RDPTR(i), 0);
971 iwl_write_direct32(priv, HBUS_TARG_WRPTR, 0 | (i << 8));
973 /* Max Tx Window size for Scheduler-ACK mode */
974 iwl_write_targ_mem(priv, priv->scd_base_addr +
975 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i),
977 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
978 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
981 iwl_write_targ_mem(priv, priv->scd_base_addr +
982 IWL49_SCD_CONTEXT_QUEUE_OFFSET(i) +
985 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
986 IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
989 iwl_write_prph(priv, IWL49_SCD_INTERRUPT_MASK,
990 (1 << priv->hw_params.max_txq_num) - 1);
992 /* Activate all Tx DMA/FIFO channels */
993 iwl_write_prph(priv, IWL49_SCD_TXFACT,
994 SCD_TXFACT_REG_TXFIFO_MASK(0, 7));
996 iwl4965_set_wr_ptrs(priv, IWL_CMD_QUEUE_NUM, 0);
998 /* Map each Tx/cmd queue to its corresponding fifo */
999 for (i = 0; i < ARRAY_SIZE(default_queue_to_tx_fifo); i++) {
1000 int ac = default_queue_to_tx_fifo[i];
1001 iwl4965_txq_ctx_activate(priv, i);
1002 iwl4965_tx_queue_set_status(priv, &priv->txq[i], ac, 0);
1005 iwl_release_nic_access(priv);
1006 spin_unlock_irqrestore(&priv->lock, flags);
1008 /* Ask for statistics now, the uCode will send statistics notification
1009 * periodically after association */
1010 iwl_send_statistics_request(priv, CMD_ASYNC);
1014 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
1015 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
1019 .auto_corr_min_ofdm = 85,
1020 .auto_corr_min_ofdm_mrc = 170,
1021 .auto_corr_min_ofdm_x1 = 105,
1022 .auto_corr_min_ofdm_mrc_x1 = 220,
1024 .auto_corr_max_ofdm = 120,
1025 .auto_corr_max_ofdm_mrc = 210,
1026 .auto_corr_max_ofdm_x1 = 140,
1027 .auto_corr_max_ofdm_mrc_x1 = 270,
1029 .auto_corr_min_cck = 125,
1030 .auto_corr_max_cck = 200,
1031 .auto_corr_min_cck_mrc = 200,
1032 .auto_corr_max_cck_mrc = 400,
1040 * iwl4965_hw_set_hw_params
1042 * Called when initializing driver
1044 int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
1047 if ((priv->cfg->mod_params->num_of_queues > IWL49_NUM_QUEUES) ||
1048 (priv->cfg->mod_params->num_of_queues < IWL_MIN_NUM_QUEUES)) {
1049 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
1050 IWL_MIN_NUM_QUEUES, IWL49_NUM_QUEUES);
1054 priv->hw_params.max_txq_num = priv->cfg->mod_params->num_of_queues;
1055 priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
1056 priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1057 priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1058 if (priv->cfg->mod_params->amsdu_size_8K)
1059 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1061 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1062 priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1063 priv->hw_params.max_stations = IWL4965_STATION_COUNT;
1064 priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
1066 priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
1067 priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
1068 priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
1069 priv->hw_params.fat_channel = BIT(IEEE80211_BAND_5GHZ);
1071 priv->hw_params.tx_chains_num = 2;
1072 priv->hw_params.rx_chains_num = 2;
1073 priv->hw_params.valid_tx_ant = ANT_A | ANT_B;
1074 priv->hw_params.valid_rx_ant = ANT_A | ANT_B;
1075 priv->hw_params.ct_kill_threshold = CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
1077 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
1078 priv->hw_params.sens = &iwl4965_sensitivity;
1084 /* set card power command */
1085 static int iwl4965_set_power(struct iwl_priv *priv,
1090 ret = iwl_send_cmd_pdu_async(priv, POWER_TABLE_CMD,
1091 sizeof(struct iwl4965_powertable_cmd),
1095 int iwl4965_hw_reg_set_txpower(struct iwl_priv *priv, s8 power)
1097 IWL_ERROR("TODO: Implement iwl4965_hw_reg_set_txpower!\n");
1101 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
1114 *res = ((num * 2 + denom) / (denom * 2)) * sign;
1120 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
1122 * Determines power supply voltage compensation for txpower calculations.
1123 * Returns number of 1/2-dB steps to subtract from gain table index,
1124 * to compensate for difference between power supply voltage during
1125 * factory measurements, vs. current power supply voltage.
1127 * Voltage indication is higher for lower voltage.
1128 * Lower voltage requires more gain (lower gain table index).
1130 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
1131 s32 current_voltage)
1135 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
1136 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
1139 iwl4965_math_div_round(current_voltage - eeprom_voltage,
1140 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
1142 if (current_voltage > eeprom_voltage)
1144 if ((comp < -2) || (comp > 2))
1150 static const struct iwl_channel_info *
1151 iwl4965_get_channel_txpower_info(struct iwl_priv *priv,
1152 enum ieee80211_band band, u16 channel)
1154 const struct iwl_channel_info *ch_info;
1156 ch_info = iwl_get_channel_info(priv, band, channel);
1158 if (!is_channel_valid(ch_info))
1164 static s32 iwl4965_get_tx_atten_grp(u16 channel)
1166 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
1167 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
1168 return CALIB_CH_GROUP_5;
1170 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
1171 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
1172 return CALIB_CH_GROUP_1;
1174 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
1175 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
1176 return CALIB_CH_GROUP_2;
1178 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
1179 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
1180 return CALIB_CH_GROUP_3;
1182 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
1183 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
1184 return CALIB_CH_GROUP_4;
1186 IWL_ERROR("Can't find txatten group for channel %d.\n", channel);
1190 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
1194 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
1195 if (priv->calib_info->band_info[b].ch_from == 0)
1198 if ((channel >= priv->calib_info->band_info[b].ch_from)
1199 && (channel <= priv->calib_info->band_info[b].ch_to))
1206 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
1213 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
1219 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
1221 * Interpolates factory measurements from the two sample channels within a
1222 * sub-band, to apply to channel of interest. Interpolation is proportional to
1223 * differences in channel frequencies, which is proportional to differences
1224 * in channel number.
1226 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
1227 struct iwl_eeprom_calib_ch_info *chan_info)
1232 const struct iwl_eeprom_calib_measure *m1;
1233 const struct iwl_eeprom_calib_measure *m2;
1234 struct iwl_eeprom_calib_measure *omeas;
1238 s = iwl4965_get_sub_band(priv, channel);
1239 if (s >= EEPROM_TX_POWER_BANDS) {
1240 IWL_ERROR("Tx Power can not find channel %d ", channel);
1244 ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
1245 ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
1246 chan_info->ch_num = (u8) channel;
1248 IWL_DEBUG_TXPOWER("channel %d subband %d factory cal ch %d & %d\n",
1249 channel, s, ch_i1, ch_i2);
1251 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
1252 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
1253 m1 = &(priv->calib_info->band_info[s].ch1.
1254 measurements[c][m]);
1255 m2 = &(priv->calib_info->band_info[s].ch2.
1256 measurements[c][m]);
1257 omeas = &(chan_info->measurements[c][m]);
1260 (u8) iwl4965_interpolate_value(channel, ch_i1,
1265 (u8) iwl4965_interpolate_value(channel, ch_i1,
1266 m1->gain_idx, ch_i2,
1268 omeas->temperature =
1269 (u8) iwl4965_interpolate_value(channel, ch_i1,
1274 (s8) iwl4965_interpolate_value(channel, ch_i1,
1279 ("chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
1280 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
1282 ("chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
1283 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
1285 ("chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
1286 m1->pa_det, m2->pa_det, omeas->pa_det);
1288 ("chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
1289 m1->temperature, m2->temperature,
1290 omeas->temperature);
1297 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
1298 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
1299 static s32 back_off_table[] = {
1300 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
1301 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
1302 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
1303 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
1307 /* Thermal compensation values for txpower for various frequency ranges ...
1308 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
1309 static struct iwl4965_txpower_comp_entry {
1310 s32 degrees_per_05db_a;
1311 s32 degrees_per_05db_a_denom;
1312 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
1313 {9, 2}, /* group 0 5.2, ch 34-43 */
1314 {4, 1}, /* group 1 5.2, ch 44-70 */
1315 {4, 1}, /* group 2 5.2, ch 71-124 */
1316 {4, 1}, /* group 3 5.2, ch 125-200 */
1317 {3, 1} /* group 4 2.4, ch all */
1320 static s32 get_min_power_index(s32 rate_power_index, u32 band)
1323 if ((rate_power_index & 7) <= 4)
1324 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
1326 return MIN_TX_GAIN_INDEX;
1334 static const struct gain_entry gain_table[2][108] = {
1335 /* 5.2GHz power gain index table */
1337 {123, 0x3F}, /* highest txpower */
1446 /* 2.4GHz power gain index table */
1448 {110, 0x3f}, /* highest txpower */
1559 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
1560 u8 is_fat, u8 ctrl_chan_high,
1561 struct iwl4965_tx_power_db *tx_power_tbl)
1563 u8 saturation_power;
1565 s32 user_target_power;
1569 s32 current_regulatory;
1570 s32 txatten_grp = CALIB_CH_GROUP_MAX;
1573 const struct iwl_channel_info *ch_info = NULL;
1574 struct iwl_eeprom_calib_ch_info ch_eeprom_info;
1575 const struct iwl_eeprom_calib_measure *measurement;
1578 s32 voltage_compensation;
1579 s32 degrees_per_05db_num;
1580 s32 degrees_per_05db_denom;
1582 s32 temperature_comp[2];
1583 s32 factory_gain_index[2];
1584 s32 factory_actual_pwr[2];
1587 /* Sanity check requested level (dBm) */
1588 if (priv->user_txpower_limit < IWL_TX_POWER_TARGET_POWER_MIN) {
1589 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
1590 priv->user_txpower_limit);
1593 if (priv->user_txpower_limit > IWL_TX_POWER_TARGET_POWER_MAX) {
1594 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
1595 priv->user_txpower_limit);
1599 /* user_txpower_limit is in dBm, convert to half-dBm (half-dB units
1600 * are used for indexing into txpower table) */
1601 user_target_power = 2 * priv->user_txpower_limit;
1603 /* Get current (RXON) channel, band, width */
1605 iwl4965_get_channel_txpower_info(priv, priv->band, channel);
1607 IWL_DEBUG_TXPOWER("chan %d band %d is_fat %d\n", channel, band,
1613 /* get txatten group, used to select 1) thermal txpower adjustment
1614 * and 2) mimo txpower balance between Tx chains. */
1615 txatten_grp = iwl4965_get_tx_atten_grp(channel);
1616 if (txatten_grp < 0)
1619 IWL_DEBUG_TXPOWER("channel %d belongs to txatten group %d\n",
1620 channel, txatten_grp);
1629 /* hardware txpower limits ...
1630 * saturation (clipping distortion) txpowers are in half-dBm */
1632 saturation_power = priv->calib_info->saturation_power24;
1634 saturation_power = priv->calib_info->saturation_power52;
1636 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
1637 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
1639 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
1641 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
1644 /* regulatory txpower limits ... reg_limit values are in half-dBm,
1645 * max_power_avg values are in dBm, convert * 2 */
1647 reg_limit = ch_info->fat_max_power_avg * 2;
1649 reg_limit = ch_info->max_power_avg * 2;
1651 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
1652 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
1654 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
1656 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
1659 /* Interpolate txpower calibration values for this channel,
1660 * based on factory calibration tests on spaced channels. */
1661 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
1663 /* calculate tx gain adjustment based on power supply voltage */
1664 voltage = priv->calib_info->voltage;
1665 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
1666 voltage_compensation =
1667 iwl4965_get_voltage_compensation(voltage, init_voltage);
1669 IWL_DEBUG_TXPOWER("curr volt %d eeprom volt %d volt comp %d\n",
1671 voltage, voltage_compensation);
1673 /* get current temperature (Celsius) */
1674 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
1675 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
1676 current_temp = KELVIN_TO_CELSIUS(current_temp);
1678 /* select thermal txpower adjustment params, based on channel group
1679 * (same frequency group used for mimo txatten adjustment) */
1680 degrees_per_05db_num =
1681 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
1682 degrees_per_05db_denom =
1683 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
1685 /* get per-chain txpower values from factory measurements */
1686 for (c = 0; c < 2; c++) {
1687 measurement = &ch_eeprom_info.measurements[c][1];
1689 /* txgain adjustment (in half-dB steps) based on difference
1690 * between factory and current temperature */
1691 factory_temp = measurement->temperature;
1692 iwl4965_math_div_round((current_temp - factory_temp) *
1693 degrees_per_05db_denom,
1694 degrees_per_05db_num,
1695 &temperature_comp[c]);
1697 factory_gain_index[c] = measurement->gain_idx;
1698 factory_actual_pwr[c] = measurement->actual_pow;
1700 IWL_DEBUG_TXPOWER("chain = %d\n", c);
1701 IWL_DEBUG_TXPOWER("fctry tmp %d, "
1702 "curr tmp %d, comp %d steps\n",
1703 factory_temp, current_temp,
1704 temperature_comp[c]);
1706 IWL_DEBUG_TXPOWER("fctry idx %d, fctry pwr %d\n",
1707 factory_gain_index[c],
1708 factory_actual_pwr[c]);
1711 /* for each of 33 bit-rates (including 1 for CCK) */
1712 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1714 union iwl4965_tx_power_dual_stream tx_power;
1716 /* for mimo, reduce each chain's txpower by half
1717 * (3dB, 6 steps), so total output power is regulatory
1720 current_regulatory = reg_limit -
1721 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1724 current_regulatory = reg_limit;
1728 /* find txpower limit, either hardware or regulatory */
1729 power_limit = saturation_power - back_off_table[i];
1730 if (power_limit > current_regulatory)
1731 power_limit = current_regulatory;
1733 /* reduce user's txpower request if necessary
1734 * for this rate on this channel */
1735 target_power = user_target_power;
1736 if (target_power > power_limit)
1737 target_power = power_limit;
1739 IWL_DEBUG_TXPOWER("rate %d sat %d reg %d usr %d tgt %d\n",
1740 i, saturation_power - back_off_table[i],
1741 current_regulatory, user_target_power,
1744 /* for each of 2 Tx chains (radio transmitters) */
1745 for (c = 0; c < 2; c++) {
1750 (s32)le32_to_cpu(priv->card_alive_init.
1751 tx_atten[txatten_grp][c]);
1755 /* calculate index; higher index means lower txpower */
1756 power_index = (u8) (factory_gain_index[c] -
1758 factory_actual_pwr[c]) -
1759 temperature_comp[c] -
1760 voltage_compensation +
1763 /* IWL_DEBUG_TXPOWER("calculated txpower index %d\n",
1766 if (power_index < get_min_power_index(i, band))
1767 power_index = get_min_power_index(i, band);
1769 /* adjust 5 GHz index to support negative indexes */
1773 /* CCK, rate 32, reduce txpower for CCK */
1774 if (i == POWER_TABLE_CCK_ENTRY)
1776 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1778 /* stay within the table! */
1779 if (power_index > 107) {
1780 IWL_WARNING("txpower index %d > 107\n",
1784 if (power_index < 0) {
1785 IWL_WARNING("txpower index %d < 0\n",
1790 /* fill txpower command for this rate/chain */
1791 tx_power.s.radio_tx_gain[c] =
1792 gain_table[band][power_index].radio;
1793 tx_power.s.dsp_predis_atten[c] =
1794 gain_table[band][power_index].dsp;
1796 IWL_DEBUG_TXPOWER("chain %d mimo %d index %d "
1797 "gain 0x%02x dsp %d\n",
1798 c, atten_value, power_index,
1799 tx_power.s.radio_tx_gain[c],
1800 tx_power.s.dsp_predis_atten[c]);
1801 }/* for each chain */
1803 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1805 }/* for each rate */
1811 * iwl4965_hw_reg_send_txpower - Configure the TXPOWER level user limit
1813 * Uses the active RXON for channel, band, and characteristics (fat, high)
1814 * The power limit is taken from priv->user_txpower_limit.
1816 int iwl4965_hw_reg_send_txpower(struct iwl_priv *priv)
1818 struct iwl4965_txpowertable_cmd cmd = { 0 };
1822 u8 ctrl_chan_high = 0;
1824 if (test_bit(STATUS_SCANNING, &priv->status)) {
1825 /* If this gets hit a lot, switch it to a BUG() and catch
1826 * the stack trace to find out who is calling this during
1828 IWL_WARNING("TX Power requested while scanning!\n");
1832 band = priv->band == IEEE80211_BAND_2GHZ;
1834 is_fat = is_fat_channel(priv->active_rxon.flags);
1837 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1841 cmd.channel = priv->active_rxon.channel;
1843 ret = iwl4965_fill_txpower_tbl(priv, band,
1844 le16_to_cpu(priv->active_rxon.channel),
1845 is_fat, ctrl_chan_high, &cmd.tx_power);
1849 ret = iwl_send_cmd_pdu(priv, REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1855 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
1858 struct iwl4965_rxon_assoc_cmd rxon_assoc;
1859 const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1860 const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1862 if ((rxon1->flags == rxon2->flags) &&
1863 (rxon1->filter_flags == rxon2->filter_flags) &&
1864 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1865 (rxon1->ofdm_ht_single_stream_basic_rates ==
1866 rxon2->ofdm_ht_single_stream_basic_rates) &&
1867 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1868 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1869 (rxon1->rx_chain == rxon2->rx_chain) &&
1870 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1871 IWL_DEBUG_INFO("Using current RXON_ASSOC. Not resending.\n");
1875 rxon_assoc.flags = priv->staging_rxon.flags;
1876 rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1877 rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1878 rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1879 rxon_assoc.reserved = 0;
1880 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1881 priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1882 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1883 priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1884 rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1886 ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1887 sizeof(rxon_assoc), &rxon_assoc, NULL);
1895 int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
1900 u8 ctrl_chan_high = 0;
1901 struct iwl4965_channel_switch_cmd cmd = { 0 };
1902 const struct iwl_channel_info *ch_info;
1904 band = priv->band == IEEE80211_BAND_2GHZ;
1906 ch_info = iwl_get_channel_info(priv, priv->band, channel);
1908 is_fat = is_fat_channel(priv->staging_rxon.flags);
1911 (priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1915 cmd.expect_beacon = 0;
1916 cmd.channel = cpu_to_le16(channel);
1917 cmd.rxon_flags = priv->active_rxon.flags;
1918 cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
1919 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1921 cmd.expect_beacon = is_channel_radar(ch_info);
1923 cmd.expect_beacon = 1;
1925 rc = iwl4965_fill_txpower_tbl(priv, band, channel, is_fat,
1926 ctrl_chan_high, &cmd.tx_power);
1928 IWL_DEBUG_11H("error:%d fill txpower_tbl\n", rc);
1932 rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1936 #define RTS_HCCA_RETRY_LIMIT 3
1937 #define RTS_DFAULT_RETRY_LIMIT 60
1939 void iwl4965_hw_build_tx_cmd_rate(struct iwl_priv *priv,
1940 struct iwl_cmd *cmd,
1941 struct ieee80211_tx_control *ctrl,
1942 struct ieee80211_hdr *hdr, int sta_id,
1945 struct iwl_tx_cmd *tx = &cmd->cmd.tx;
1946 u8 rts_retry_limit = 0;
1947 u8 data_retry_limit = 0;
1948 u16 fc = le16_to_cpu(hdr->frame_control);
1951 int rate_idx = min(ctrl->tx_rate->hw_value & 0xffff, IWL_RATE_COUNT - 1);
1953 rate_plcp = iwl_rates[rate_idx].plcp;
1955 rts_retry_limit = (is_hcca) ?
1956 RTS_HCCA_RETRY_LIMIT : RTS_DFAULT_RETRY_LIMIT;
1958 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
1959 rate_flags |= RATE_MCS_CCK_MSK;
1962 if (ieee80211_is_probe_response(fc)) {
1963 data_retry_limit = 3;
1964 if (data_retry_limit < rts_retry_limit)
1965 rts_retry_limit = data_retry_limit;
1967 data_retry_limit = IWL_DEFAULT_TX_RETRY;
1969 if (priv->data_retry_limit != -1)
1970 data_retry_limit = priv->data_retry_limit;
1973 if (ieee80211_is_data(fc)) {
1974 tx->initial_rate_index = 0;
1975 tx->tx_flags |= TX_CMD_FLG_STA_RATE_MSK;
1977 switch (fc & IEEE80211_FCTL_STYPE) {
1978 case IEEE80211_STYPE_AUTH:
1979 case IEEE80211_STYPE_DEAUTH:
1980 case IEEE80211_STYPE_ASSOC_REQ:
1981 case IEEE80211_STYPE_REASSOC_REQ:
1982 if (tx->tx_flags & TX_CMD_FLG_RTS_MSK) {
1983 tx->tx_flags &= ~TX_CMD_FLG_RTS_MSK;
1984 tx->tx_flags |= TX_CMD_FLG_CTS_MSK;
1991 /* Alternate between antenna A and B for successive frames */
1992 if (priv->use_ant_b_for_management_frame) {
1993 priv->use_ant_b_for_management_frame = 0;
1994 rate_flags |= RATE_MCS_ANT_B_MSK;
1996 priv->use_ant_b_for_management_frame = 1;
1997 rate_flags |= RATE_MCS_ANT_A_MSK;
2001 tx->rts_retry_limit = rts_retry_limit;
2002 tx->data_retry_limit = data_retry_limit;
2003 tx->rate_n_flags = iwl4965_hw_set_rate_n_flags(rate_plcp, rate_flags);
2006 static int iwl4965_shared_mem_rx_idx(struct iwl_priv *priv)
2008 struct iwl4965_shared *s = priv->shared_virt;
2009 return le32_to_cpu(s->rb_closed) & 0xFFF;
2012 int iwl4965_hw_get_temperature(struct iwl_priv *priv)
2014 return priv->temperature;
2017 unsigned int iwl4965_hw_get_beacon_cmd(struct iwl_priv *priv,
2018 struct iwl_frame *frame, u8 rate)
2020 struct iwl4965_tx_beacon_cmd *tx_beacon_cmd;
2021 unsigned int frame_size;
2023 tx_beacon_cmd = &frame->u.beacon;
2024 memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
2026 tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
2027 tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2029 frame_size = iwl4965_fill_beacon_frame(priv,
2030 tx_beacon_cmd->frame,
2032 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
2034 BUG_ON(frame_size > MAX_MPDU_SIZE);
2035 tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
2037 if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
2038 tx_beacon_cmd->tx.rate_n_flags =
2039 iwl4965_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
2041 tx_beacon_cmd->tx.rate_n_flags =
2042 iwl4965_hw_set_rate_n_flags(rate, 0);
2044 tx_beacon_cmd->tx.tx_flags = (TX_CMD_FLG_SEQ_CTL_MSK |
2045 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK);
2046 return (sizeof(*tx_beacon_cmd) + frame_size);
2049 int iwl4965_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *ptr,
2050 dma_addr_t addr, u16 len)
2053 struct iwl_tfd_frame *tfd = ptr;
2054 u32 num_tbs = IWL_GET_BITS(*tfd, num_tbs);
2056 /* Each TFD can point to a maximum 20 Tx buffers */
2057 if ((num_tbs >= MAX_NUM_OF_TBS) || (num_tbs < 0)) {
2058 IWL_ERROR("Error can not send more than %d chunks\n",
2063 index = num_tbs / 2;
2064 is_odd = num_tbs & 0x1;
2067 tfd->pa[index].tb1_addr = cpu_to_le32(addr);
2068 IWL_SET_BITS(tfd->pa[index], tb1_addr_hi,
2069 iwl_get_dma_hi_address(addr));
2070 IWL_SET_BITS(tfd->pa[index], tb1_len, len);
2072 IWL_SET_BITS(tfd->pa[index], tb2_addr_lo16,
2073 (u32) (addr & 0xffff));
2074 IWL_SET_BITS(tfd->pa[index], tb2_addr_hi20, addr >> 16);
2075 IWL_SET_BITS(tfd->pa[index], tb2_len, len);
2078 IWL_SET_BITS(*tfd, num_tbs, num_tbs + 1);
2083 static int iwl4965_alloc_shared_mem(struct iwl_priv *priv)
2085 priv->shared_virt = pci_alloc_consistent(priv->pci_dev,
2086 sizeof(struct iwl4965_shared),
2087 &priv->shared_phys);
2088 if (!priv->shared_virt)
2091 memset(priv->shared_virt, 0, sizeof(struct iwl4965_shared));
2093 priv->rb_closed_offset = offsetof(struct iwl4965_shared, rb_closed);
2098 static void iwl4965_free_shared_mem(struct iwl_priv *priv)
2100 if (priv->shared_virt)
2101 pci_free_consistent(priv->pci_dev,
2102 sizeof(struct iwl4965_shared),
2108 * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
2110 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
2111 struct iwl_tx_queue *txq,
2115 int txq_id = txq->q.id;
2116 struct iwl4965_shared *shared_data = priv->shared_virt;
2118 len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
2120 /* Set up byte count within first 256 entries */
2121 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2122 tfd_offset[txq->q.write_ptr], byte_cnt, len);
2124 /* If within first 64 entries, duplicate at end */
2125 if (txq->q.write_ptr < IWL49_MAX_WIN_SIZE)
2126 IWL_SET_BITS16(shared_data->queues_byte_cnt_tbls[txq_id].
2127 tfd_offset[IWL49_QUEUE_SIZE + txq->q.write_ptr],
2132 * sign_extend - Sign extend a value using specified bit as sign-bit
2134 * Example: sign_extend(9, 3) would return -7 as bit3 of 1001b is 1
2135 * and bit0..2 is 001b which when sign extended to 1111111111111001b is -7.
2137 * @param oper value to sign extend
2138 * @param index 0 based bit index (0<=index<32) to sign bit
2140 static s32 sign_extend(u32 oper, int index)
2142 u8 shift = 31 - index;
2144 return (s32)(oper << shift) >> shift;
2148 * iwl4965_get_temperature - return the calibrated temperature (in Kelvin)
2149 * @statistics: Provides the temperature reading from the uCode
2151 * A return of <0 indicates bogus data in the statistics
2153 int iwl4965_get_temperature(const struct iwl_priv *priv)
2160 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
2161 (priv->statistics.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)) {
2162 IWL_DEBUG_TEMP("Running FAT temperature calibration\n");
2163 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
2164 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
2165 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
2166 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
2168 IWL_DEBUG_TEMP("Running temperature calibration\n");
2169 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
2170 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
2171 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
2172 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
2176 * Temperature is only 23 bits, so sign extend out to 32.
2178 * NOTE If we haven't received a statistics notification yet
2179 * with an updated temperature, use R4 provided to us in the
2180 * "initialize" ALIVE response.
2182 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
2183 vt = sign_extend(R4, 23);
2186 le32_to_cpu(priv->statistics.general.temperature), 23);
2188 IWL_DEBUG_TEMP("Calib values R[1-3]: %d %d %d R4: %d\n",
2192 IWL_ERROR("Calibration conflict R1 == R3\n");
2196 /* Calculate temperature in degrees Kelvin, adjust by 97%.
2197 * Add offset to center the adjustment around 0 degrees Centigrade. */
2198 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
2199 temperature /= (R3 - R1);
2200 temperature = (temperature * 97) / 100 +
2201 TEMPERATURE_CALIB_KELVIN_OFFSET;
2203 IWL_DEBUG_TEMP("Calibrated temperature: %dK, %dC\n", temperature,
2204 KELVIN_TO_CELSIUS(temperature));
2209 /* Adjust Txpower only if temperature variance is greater than threshold. */
2210 #define IWL_TEMPERATURE_THRESHOLD 3
2213 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
2215 * If the temperature changed has changed sufficiently, then a recalibration
2218 * Assumes caller will replace priv->last_temperature once calibration
2221 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
2225 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
2226 IWL_DEBUG_TEMP("Temperature not updated -- no statistics.\n");
2230 temp_diff = priv->temperature - priv->last_temperature;
2232 /* get absolute value */
2233 if (temp_diff < 0) {
2234 IWL_DEBUG_POWER("Getting cooler, delta %d, \n", temp_diff);
2235 temp_diff = -temp_diff;
2236 } else if (temp_diff == 0)
2237 IWL_DEBUG_POWER("Same temp, \n");
2239 IWL_DEBUG_POWER("Getting warmer, delta %d, \n", temp_diff);
2241 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
2242 IWL_DEBUG_POWER("Thermal txpower calib not needed\n");
2246 IWL_DEBUG_POWER("Thermal txpower calib needed\n");
2251 /* Calculate noise level, based on measurements during network silence just
2252 * before arriving beacon. This measurement can be done only if we know
2253 * exactly when to expect beacons, therefore only when we're associated. */
2254 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
2256 struct statistics_rx_non_phy *rx_info
2257 = &(priv->statistics.rx.general);
2258 int num_active_rx = 0;
2259 int total_silence = 0;
2261 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
2263 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
2265 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
2267 if (bcn_silence_a) {
2268 total_silence += bcn_silence_a;
2271 if (bcn_silence_b) {
2272 total_silence += bcn_silence_b;
2275 if (bcn_silence_c) {
2276 total_silence += bcn_silence_c;
2280 /* Average among active antennas */
2282 priv->last_rx_noise = (total_silence / num_active_rx) - 107;
2284 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2286 IWL_DEBUG_CALIB("inband silence a %u, b %u, c %u, dBm %d\n",
2287 bcn_silence_a, bcn_silence_b, bcn_silence_c,
2288 priv->last_rx_noise);
2291 void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
2292 struct iwl_rx_mem_buffer *rxb)
2294 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2298 IWL_DEBUG_RX("Statistics notification received (%d vs %d).\n",
2299 (int)sizeof(priv->statistics), pkt->len);
2301 change = ((priv->statistics.general.temperature !=
2302 pkt->u.stats.general.temperature) ||
2303 ((priv->statistics.flag &
2304 STATISTICS_REPLY_FLG_FAT_MODE_MSK) !=
2305 (pkt->u.stats.flag & STATISTICS_REPLY_FLG_FAT_MODE_MSK)));
2307 memcpy(&priv->statistics, &pkt->u.stats, sizeof(priv->statistics));
2309 set_bit(STATUS_STATISTICS, &priv->status);
2311 /* Reschedule the statistics timer to occur in
2312 * REG_RECALIB_PERIOD seconds to ensure we get a
2313 * thermal update even if the uCode doesn't give
2315 mod_timer(&priv->statistics_periodic, jiffies +
2316 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
2318 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2319 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
2320 iwl4965_rx_calc_noise(priv);
2321 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
2322 queue_work(priv->workqueue, &priv->sensitivity_work);
2326 iwl_leds_background(priv);
2328 /* If the hardware hasn't reported a change in
2329 * temperature then don't bother computing a
2330 * calibrated temperature value */
2334 temp = iwl4965_get_temperature(priv);
2338 if (priv->temperature != temp) {
2339 if (priv->temperature)
2340 IWL_DEBUG_TEMP("Temperature changed "
2341 "from %dC to %dC\n",
2342 KELVIN_TO_CELSIUS(priv->temperature),
2343 KELVIN_TO_CELSIUS(temp));
2345 IWL_DEBUG_TEMP("Temperature "
2346 "initialized to %dC\n",
2347 KELVIN_TO_CELSIUS(temp));
2350 priv->temperature = temp;
2351 set_bit(STATUS_TEMPERATURE, &priv->status);
2353 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
2354 iwl4965_is_temp_calib_needed(priv))
2355 queue_work(priv->workqueue, &priv->txpower_work);
2358 static void iwl4965_add_radiotap(struct iwl_priv *priv,
2359 struct sk_buff *skb,
2360 struct iwl4965_rx_phy_res *rx_start,
2361 struct ieee80211_rx_status *stats,
2364 s8 signal = stats->signal;
2366 int rate = stats->rate_idx;
2367 u64 tsf = stats->mactime;
2369 __le16 phy_flags_hw = rx_start->phy_flags;
2370 struct iwl4965_rt_rx_hdr {
2371 struct ieee80211_radiotap_header rt_hdr;
2372 __le64 rt_tsf; /* TSF */
2373 u8 rt_flags; /* radiotap packet flags */
2374 u8 rt_rate; /* rate in 500kb/s */
2375 __le16 rt_channelMHz; /* channel in MHz */
2376 __le16 rt_chbitmask; /* channel bitfield */
2377 s8 rt_dbmsignal; /* signal in dBm, kluged to signed */
2379 u8 rt_antenna; /* antenna number */
2380 } __attribute__ ((packed)) *iwl4965_rt;
2382 /* TODO: We won't have enough headroom for HT frames. Fix it later. */
2383 if (skb_headroom(skb) < sizeof(*iwl4965_rt)) {
2384 if (net_ratelimit())
2385 printk(KERN_ERR "not enough headroom [%d] for "
2386 "radiotap head [%zd]\n",
2387 skb_headroom(skb), sizeof(*iwl4965_rt));
2391 /* put radiotap header in front of 802.11 header and data */
2392 iwl4965_rt = (void *)skb_push(skb, sizeof(*iwl4965_rt));
2394 /* initialise radiotap header */
2395 iwl4965_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
2396 iwl4965_rt->rt_hdr.it_pad = 0;
2398 /* total header + data */
2399 put_unaligned(cpu_to_le16(sizeof(*iwl4965_rt)),
2400 &iwl4965_rt->rt_hdr.it_len);
2402 /* Indicate all the fields we add to the radiotap header */
2403 put_unaligned(cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
2404 (1 << IEEE80211_RADIOTAP_FLAGS) |
2405 (1 << IEEE80211_RADIOTAP_RATE) |
2406 (1 << IEEE80211_RADIOTAP_CHANNEL) |
2407 (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
2408 (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
2409 (1 << IEEE80211_RADIOTAP_ANTENNA)),
2410 &iwl4965_rt->rt_hdr.it_present);
2412 /* Zero the flags, we'll add to them as we go */
2413 iwl4965_rt->rt_flags = 0;
2415 put_unaligned(cpu_to_le64(tsf), &iwl4965_rt->rt_tsf);
2417 iwl4965_rt->rt_dbmsignal = signal;
2418 iwl4965_rt->rt_dbmnoise = noise;
2420 /* Convert the channel frequency and set the flags */
2421 put_unaligned(cpu_to_le16(stats->freq), &iwl4965_rt->rt_channelMHz);
2422 if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
2423 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2424 IEEE80211_CHAN_5GHZ),
2425 &iwl4965_rt->rt_chbitmask);
2426 else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
2427 put_unaligned(cpu_to_le16(IEEE80211_CHAN_CCK |
2428 IEEE80211_CHAN_2GHZ),
2429 &iwl4965_rt->rt_chbitmask);
2431 put_unaligned(cpu_to_le16(IEEE80211_CHAN_OFDM |
2432 IEEE80211_CHAN_2GHZ),
2433 &iwl4965_rt->rt_chbitmask);
2436 iwl4965_rt->rt_rate = 0;
2438 iwl4965_rt->rt_rate = iwl_rates[rate].ieee;
2443 * It seems that the antenna field in the phy flags value
2444 * is actually a bitfield. This is undefined by radiotap,
2445 * it wants an actual antenna number but I always get "7"
2446 * for most legacy frames I receive indicating that the
2447 * same frame was received on all three RX chains.
2449 * I think this field should be removed in favour of a
2450 * new 802.11n radiotap field "RX chains" that is defined
2453 antenna = phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK;
2454 iwl4965_rt->rt_antenna = le16_to_cpu(antenna) >> 4;
2456 /* set the preamble flag if appropriate */
2457 if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
2458 iwl4965_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
2460 stats->flag |= RX_FLAG_RADIOTAP;
2463 static void iwl_update_rx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2465 /* 0 - mgmt, 1 - cnt, 2 - data */
2466 int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2467 priv->rx_stats[idx].cnt++;
2468 priv->rx_stats[idx].bytes += len;
2472 * returns non-zero if packet should be dropped
2474 static int iwl4965_set_decrypted_flag(struct iwl_priv *priv,
2475 struct ieee80211_hdr *hdr,
2477 struct ieee80211_rx_status *stats)
2479 u16 fc = le16_to_cpu(hdr->frame_control);
2481 if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2484 if (!(fc & IEEE80211_FCTL_PROTECTED))
2487 IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2488 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2489 case RX_RES_STATUS_SEC_TYPE_TKIP:
2490 /* The uCode has got a bad phase 1 Key, pushes the packet.
2491 * Decryption will be done in SW. */
2492 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2493 RX_RES_STATUS_BAD_KEY_TTAK)
2496 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2497 RX_RES_STATUS_BAD_ICV_MIC) {
2498 /* bad ICV, the packet is destroyed since the
2499 * decryption is inplace, drop it */
2500 IWL_DEBUG_RX("Packet destroyed\n");
2503 case RX_RES_STATUS_SEC_TYPE_WEP:
2504 case RX_RES_STATUS_SEC_TYPE_CCMP:
2505 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2506 RX_RES_STATUS_DECRYPT_OK) {
2507 IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2508 stats->flag |= RX_FLAG_DECRYPTED;
2518 static u32 iwl4965_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
2520 u32 decrypt_out = 0;
2522 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
2523 RX_RES_STATUS_STATION_FOUND)
2524 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
2525 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
2527 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
2529 /* packet was not encrypted */
2530 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2531 RX_RES_STATUS_SEC_TYPE_NONE)
2534 /* packet was encrypted with unknown alg */
2535 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
2536 RX_RES_STATUS_SEC_TYPE_ERR)
2539 /* decryption was not done in HW */
2540 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
2541 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
2544 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
2546 case RX_RES_STATUS_SEC_TYPE_CCMP:
2547 /* alg is CCM: check MIC only */
2548 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
2550 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2552 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2556 case RX_RES_STATUS_SEC_TYPE_TKIP:
2557 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
2559 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
2562 /* fall through if TTAK OK */
2564 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
2565 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
2567 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
2571 IWL_DEBUG_RX("decrypt_in:0x%x decrypt_out = 0x%x\n",
2572 decrypt_in, decrypt_out);
2577 static void iwl4965_handle_data_packet(struct iwl_priv *priv, int is_data,
2579 struct iwl_rx_mem_buffer *rxb,
2580 struct ieee80211_rx_status *stats)
2582 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2583 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2584 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) : NULL;
2585 struct ieee80211_hdr *hdr;
2588 unsigned int skblen;
2590 u32 ampdu_status_legacy;
2592 if (!include_phy && priv->last_phy_res[0])
2593 rx_start = (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2596 IWL_ERROR("MPDU frame without a PHY data\n");
2600 hdr = (struct ieee80211_hdr *)((u8 *) & rx_start[1] +
2601 rx_start->cfg_phy_cnt);
2603 len = le16_to_cpu(rx_start->byte_count);
2605 rx_end = (__le32 *) ((u8 *) & pkt->u.raw[0] +
2606 sizeof(struct iwl4965_rx_phy_res) +
2607 rx_start->cfg_phy_cnt + len);
2610 struct iwl4965_rx_mpdu_res_start *amsdu =
2611 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2613 hdr = (struct ieee80211_hdr *)(pkt->u.raw +
2614 sizeof(struct iwl4965_rx_mpdu_res_start));
2615 len = le16_to_cpu(amsdu->byte_count);
2616 rx_start->byte_count = amsdu->byte_count;
2617 rx_end = (__le32 *) (((u8 *) hdr) + len);
2619 /* In monitor mode allow 802.11 ACk frames (10 bytes) */
2620 if (len > priv->hw_params.max_pkt_size ||
2621 len < ((priv->iw_mode == IEEE80211_IF_TYPE_MNTR) ? 10 : 16)) {
2622 IWL_WARNING("byte count out of range [16,4K] : %d\n", len);
2626 ampdu_status = le32_to_cpu(*rx_end);
2627 skblen = ((u8 *) rx_end - (u8 *) & pkt->u.raw[0]) + sizeof(u32);
2630 /* New status scheme, need to translate */
2631 ampdu_status_legacy = ampdu_status;
2632 ampdu_status = iwl4965_translate_rx_status(priv, ampdu_status);
2635 /* start from MAC */
2636 skb_reserve(rxb->skb, (void *)hdr - (void *)pkt);
2637 skb_put(rxb->skb, len); /* end where data ends */
2639 /* We only process data packets if the interface is open */
2640 if (unlikely(!priv->is_open)) {
2641 IWL_DEBUG_DROP_LIMIT
2642 ("Dropping packet while interface is not open.\n");
2647 hdr = (struct ieee80211_hdr *)rxb->skb->data;
2649 /* in case of HW accelerated crypto and bad decryption, drop */
2650 if (!priv->hw_params.sw_crypto &&
2651 iwl4965_set_decrypted_flag(priv, hdr, ampdu_status, stats))
2654 if (priv->add_radiotap)
2655 iwl4965_add_radiotap(priv, rxb->skb, rx_start, stats, ampdu_status);
2657 iwl_update_rx_stats(priv, le16_to_cpu(hdr->frame_control), len);
2658 ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
2659 priv->alloc_rxb_skb--;
2663 /* Calc max signal level (dBm) among 3 possible receivers */
2664 static int iwl4965_calc_rssi(struct iwl_priv *priv,
2665 struct iwl4965_rx_phy_res *rx_resp)
2667 /* data from PHY/DSP regarding signal strength, etc.,
2668 * contents are always there, not configurable by host. */
2669 struct iwl4965_rx_non_cfg_phy *ncphy =
2670 (struct iwl4965_rx_non_cfg_phy *)rx_resp->non_cfg_phy;
2671 u32 agc = (le16_to_cpu(ncphy->agc_info) & IWL_AGC_DB_MASK)
2674 u32 valid_antennae =
2675 (le16_to_cpu(rx_resp->phy_flags) & RX_PHY_FLAGS_ANTENNAE_MASK)
2676 >> RX_PHY_FLAGS_ANTENNAE_OFFSET;
2680 /* Find max rssi among 3 possible receivers.
2681 * These values are measured by the digital signal processor (DSP).
2682 * They should stay fairly constant even as the signal strength varies,
2683 * if the radio's automatic gain control (AGC) is working right.
2684 * AGC value (see below) will provide the "interesting" info. */
2685 for (i = 0; i < 3; i++)
2686 if (valid_antennae & (1 << i))
2687 max_rssi = max(ncphy->rssi_info[i << 1], max_rssi);
2689 IWL_DEBUG_STATS("Rssi In A %d B %d C %d Max %d AGC dB %d\n",
2690 ncphy->rssi_info[0], ncphy->rssi_info[2], ncphy->rssi_info[4],
2693 /* dBm = max_rssi dB - agc dB - constant.
2694 * Higher AGC (higher radio gain) means lower signal. */
2695 return (max_rssi - agc - IWL_RSSI_OFFSET);
2698 static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
2700 unsigned long flags;
2702 spin_lock_irqsave(&priv->sta_lock, flags);
2703 priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
2704 priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
2705 priv->stations[sta_id].sta.sta.modify_mask = 0;
2706 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
2707 spin_unlock_irqrestore(&priv->sta_lock, flags);
2709 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
2712 static void iwl4965_update_ps_mode(struct iwl_priv *priv, u16 ps_bit, u8 *addr)
2714 /* FIXME: need locking over ps_status ??? */
2715 u8 sta_id = iwl_find_station(priv, addr);
2717 if (sta_id != IWL_INVALID_STATION) {
2718 u8 sta_awake = priv->stations[sta_id].
2719 ps_status == STA_PS_STATUS_WAKE;
2721 if (sta_awake && ps_bit)
2722 priv->stations[sta_id].ps_status = STA_PS_STATUS_SLEEP;
2723 else if (!sta_awake && !ps_bit) {
2724 iwl4965_sta_modify_ps_wake(priv, sta_id);
2725 priv->stations[sta_id].ps_status = STA_PS_STATUS_WAKE;
2729 #ifdef CONFIG_IWLWIFI_DEBUG
2732 * iwl4965_dbg_report_frame - dump frame to syslog during debug sessions
2734 * You may hack this function to show different aspects of received frames,
2735 * including selective frame dumps.
2736 * group100 parameter selects whether to show 1 out of 100 good frames.
2738 * TODO: This was originally written for 3945, need to audit for
2739 * proper operation with 4965.
2741 static void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2742 struct iwl_rx_packet *pkt,
2743 struct ieee80211_hdr *header, int group100)
2746 u32 print_summary = 0;
2747 u32 print_dump = 0; /* set to 1 to dump all frames' contents */
2764 struct iwl4965_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
2765 struct iwl4965_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
2766 struct iwl4965_rx_frame_end *rx_end = IWL_RX_END(pkt);
2767 u8 *data = IWL_RX_DATA(pkt);
2769 if (likely(!(priv->debug_level & IWL_DL_RX)))
2773 fc = le16_to_cpu(header->frame_control);
2774 seq_ctl = le16_to_cpu(header->seq_ctrl);
2777 channel = le16_to_cpu(rx_hdr->channel);
2778 phy_flags = le16_to_cpu(rx_hdr->phy_flags);
2779 rate_sym = rx_hdr->rate;
2780 length = le16_to_cpu(rx_hdr->len);
2782 /* end-of-frame status and timestamp */
2783 status = le32_to_cpu(rx_end->status);
2784 bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
2785 tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
2786 tsf = le64_to_cpu(rx_end->timestamp);
2788 /* signal statistics */
2789 rssi = rx_stats->rssi;
2790 agc = rx_stats->agc;
2791 sig_avg = le16_to_cpu(rx_stats->sig_avg);
2792 noise_diff = le16_to_cpu(rx_stats->noise_diff);
2794 to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
2796 /* if data frame is to us and all is good,
2797 * (optionally) print summary for only 1 out of every 100 */
2798 if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
2799 (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
2802 print_summary = 1; /* print each frame */
2803 else if (priv->framecnt_to_us < 100) {
2804 priv->framecnt_to_us++;
2807 priv->framecnt_to_us = 0;
2812 /* print summary for all other frames */
2816 if (print_summary) {
2822 title = "100Frames";
2823 else if (fc & IEEE80211_FCTL_RETRY)
2825 else if (ieee80211_is_assoc_response(fc))
2827 else if (ieee80211_is_reassoc_response(fc))
2829 else if (ieee80211_is_probe_response(fc)) {
2831 print_dump = 1; /* dump frame contents */
2832 } else if (ieee80211_is_beacon(fc)) {
2834 print_dump = 1; /* dump frame contents */
2835 } else if (ieee80211_is_atim(fc))
2837 else if (ieee80211_is_auth(fc))
2839 else if (ieee80211_is_deauth(fc))
2841 else if (ieee80211_is_disassoc(fc))
2846 rate_idx = iwl4965_hwrate_to_plcp_idx(rate_sym);
2847 if (unlikely(rate_idx == -1))
2850 bitrate = iwl_rates[rate_idx].ieee / 2;
2852 /* print frame summary.
2853 * MAC addresses show just the last byte (for brevity),
2854 * but you can hack it to show more, if you'd like to. */
2856 IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
2857 "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
2858 title, fc, header->addr1[5],
2859 length, rssi, channel, bitrate);
2861 /* src/dst addresses assume managed mode */
2862 IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
2863 "src=0x%02x, rssi=%u, tim=%lu usec, "
2864 "phy=0x%02x, chnl=%d\n",
2865 title, fc, header->addr1[5],
2866 header->addr3[5], rssi,
2867 tsf_low - priv->scan_start_tsf,
2868 phy_flags, channel);
2872 iwl_print_hex_dump(priv, IWL_DL_RX, data, length);
2875 static inline void iwl4965_dbg_report_frame(struct iwl_priv *priv,
2876 struct iwl_rx_packet *pkt,
2877 struct ieee80211_hdr *header,
2885 /* Called for REPLY_RX (legacy ABG frames), or
2886 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
2887 static void iwl4965_rx_reply_rx(struct iwl_priv *priv,
2888 struct iwl_rx_mem_buffer *rxb)
2890 struct ieee80211_hdr *header;
2891 struct ieee80211_rx_status rx_status;
2892 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2893 /* Use phy data (Rx signal strength, etc.) contained within
2894 * this rx packet for legacy frames,
2895 * or phy data cached from REPLY_RX_PHY_CMD for HT frames. */
2896 int include_phy = (pkt->hdr.cmd == REPLY_RX);
2897 struct iwl4965_rx_phy_res *rx_start = (include_phy) ?
2898 (struct iwl4965_rx_phy_res *)&(pkt->u.raw[0]) :
2899 (struct iwl4965_rx_phy_res *)&priv->last_phy_res[1];
2901 unsigned int len = 0;
2905 rx_status.mactime = le64_to_cpu(rx_start->timestamp);
2907 ieee80211_channel_to_frequency(le16_to_cpu(rx_start->channel));
2908 rx_status.band = (rx_start->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
2909 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
2910 rx_status.rate_idx =
2911 iwl4965_hwrate_to_plcp_idx(le32_to_cpu(rx_start->rate_n_flags));
2912 if (rx_status.band == IEEE80211_BAND_5GHZ)
2913 rx_status.rate_idx -= IWL_FIRST_OFDM_RATE;
2915 rx_status.antenna = 0;
2918 if ((unlikely(rx_start->cfg_phy_cnt > 20))) {
2919 IWL_DEBUG_DROP("dsp size out of range [0,20]: %d/n",
2920 rx_start->cfg_phy_cnt);
2925 if (priv->last_phy_res[0])
2926 rx_start = (struct iwl4965_rx_phy_res *)
2927 &priv->last_phy_res[1];
2933 IWL_ERROR("MPDU frame without a PHY data\n");
2938 header = (struct ieee80211_hdr *)((u8 *) & rx_start[1]
2939 + rx_start->cfg_phy_cnt);
2941 len = le16_to_cpu(rx_start->byte_count);
2942 rx_end = (__le32 *)(pkt->u.raw + rx_start->cfg_phy_cnt +
2943 sizeof(struct iwl4965_rx_phy_res) + len);
2945 struct iwl4965_rx_mpdu_res_start *amsdu =
2946 (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw;
2948 header = (void *)(pkt->u.raw +
2949 sizeof(struct iwl4965_rx_mpdu_res_start));
2950 len = le16_to_cpu(amsdu->byte_count);
2951 rx_end = (__le32 *) (pkt->u.raw +
2952 sizeof(struct iwl4965_rx_mpdu_res_start) + len);
2955 if (!(*rx_end & RX_RES_STATUS_NO_CRC32_ERROR) ||
2956 !(*rx_end & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
2957 IWL_DEBUG_RX("Bad CRC or FIFO: 0x%08X.\n",
2958 le32_to_cpu(*rx_end));
2962 priv->ucode_beacon_time = le32_to_cpu(rx_start->beacon_time_stamp);
2964 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
2965 rx_status.signal = iwl4965_calc_rssi(priv, rx_start);
2967 /* Meaningful noise values are available only from beacon statistics,
2968 * which are gathered only when associated, and indicate noise
2969 * only for the associated network channel ...
2970 * Ignore these noise values while scanning (other channels) */
2971 if (iwl_is_associated(priv) &&
2972 !test_bit(STATUS_SCANNING, &priv->status)) {
2973 rx_status.noise = priv->last_rx_noise;
2974 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal,
2977 rx_status.noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2978 rx_status.qual = iwl4965_calc_sig_qual(rx_status.signal, 0);
2981 /* Reset beacon noise level if not associated. */
2982 if (!iwl_is_associated(priv))
2983 priv->last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
2985 /* Set "1" to report good data frames in groups of 100 */
2986 /* FIXME: need to optimze the call: */
2987 iwl4965_dbg_report_frame(priv, pkt, header, 1);
2989 IWL_DEBUG_STATS_LIMIT("Rssi %d, noise %d, qual %d, TSF %llu\n",
2990 rx_status.signal, rx_status.noise, rx_status.signal,
2991 (unsigned long long)rx_status.mactime);
2994 if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
2995 iwl4965_handle_data_packet(priv, 1, include_phy,
3000 network_packet = iwl4965_is_network_packet(priv, header);
3001 if (network_packet) {
3002 priv->last_rx_rssi = rx_status.signal;
3003 priv->last_beacon_time = priv->ucode_beacon_time;
3004 priv->last_tsf = le64_to_cpu(rx_start->timestamp);
3007 fc = le16_to_cpu(header->frame_control);
3008 switch (fc & IEEE80211_FCTL_FTYPE) {
3009 case IEEE80211_FTYPE_MGMT:
3010 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3011 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3013 iwl4965_handle_data_packet(priv, 0, include_phy, rxb, &rx_status);
3016 case IEEE80211_FTYPE_CTL:
3017 #ifdef CONFIG_IWL4965_HT
3018 switch (fc & IEEE80211_FCTL_STYPE) {
3019 case IEEE80211_STYPE_BACK_REQ:
3020 IWL_DEBUG_HT("IEEE80211_STYPE_BACK_REQ arrived\n");
3021 iwl4965_handle_data_packet(priv, 0, include_phy,
3030 case IEEE80211_FTYPE_DATA: {
3031 DECLARE_MAC_BUF(mac1);
3032 DECLARE_MAC_BUF(mac2);
3033 DECLARE_MAC_BUF(mac3);
3035 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
3036 iwl4965_update_ps_mode(priv, fc & IEEE80211_FCTL_PM,
3039 if (unlikely(!network_packet))
3040 IWL_DEBUG_DROP("Dropping (non network): "
3042 print_mac(mac1, header->addr1),
3043 print_mac(mac2, header->addr2),
3044 print_mac(mac3, header->addr3));
3045 else if (unlikely(iwl4965_is_duplicate_packet(priv, header)))
3046 IWL_DEBUG_DROP("Dropping (dup): %s, %s, %s\n",
3047 print_mac(mac1, header->addr1),
3048 print_mac(mac2, header->addr2),
3049 print_mac(mac3, header->addr3));
3051 iwl4965_handle_data_packet(priv, 1, include_phy, rxb,
3061 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
3062 * This will be used later in iwl4965_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
3063 static void iwl4965_rx_reply_rx_phy(struct iwl_priv *priv,
3064 struct iwl_rx_mem_buffer *rxb)
3066 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3067 priv->last_phy_res[0] = 1;
3068 memcpy(&priv->last_phy_res[1], &(pkt->u.raw[0]),
3069 sizeof(struct iwl4965_rx_phy_res));
3071 static void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
3072 struct iwl_rx_mem_buffer *rxb)
3075 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3076 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3077 struct iwl4965_missed_beacon_notif *missed_beacon;
3079 missed_beacon = &pkt->u.missed_beacon;
3080 if (le32_to_cpu(missed_beacon->consequtive_missed_beacons) > 5) {
3081 IWL_DEBUG_CALIB("missed bcn cnsq %d totl %d rcd %d expctd %d\n",
3082 le32_to_cpu(missed_beacon->consequtive_missed_beacons),
3083 le32_to_cpu(missed_beacon->total_missed_becons),
3084 le32_to_cpu(missed_beacon->num_recvd_beacons),
3085 le32_to_cpu(missed_beacon->num_expected_beacons));
3086 if (!test_bit(STATUS_SCANNING, &priv->status))
3087 iwl_init_sensitivity(priv);
3089 #endif /*CONFIG_IWL4965_RUN_TIME_CALIB*/
3091 #ifdef CONFIG_IWL4965_HT
3094 * iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
3096 static void iwl4965_sta_modify_enable_tid_tx(struct iwl_priv *priv,
3097 int sta_id, int tid)
3099 unsigned long flags;
3101 /* Remove "disable" flag, to enable Tx for this TID */
3102 spin_lock_irqsave(&priv->sta_lock, flags);
3103 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
3104 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
3105 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3106 spin_unlock_irqrestore(&priv->sta_lock, flags);
3108 iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3112 * iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
3114 * Go through block-ack's bitmap of ACK'd frames, update driver's record of
3115 * ACK vs. not. This gets sent to mac80211, then to rate scaling algo.
3117 static int iwl4965_tx_status_reply_compressed_ba(struct iwl_priv *priv,
3118 struct iwl_ht_agg *agg,
3119 struct iwl4965_compressed_ba_resp*
3124 u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
3125 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3128 struct ieee80211_tx_status *tx_status;
3130 if (unlikely(!agg->wait_for_ba)) {
3131 IWL_ERROR("Received BA when not expected\n");
3135 /* Mark that the expected block-ack response arrived */
3136 agg->wait_for_ba = 0;
3137 IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
3139 /* Calculate shift to align block-ack bits with our Tx window bits */
3140 sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
3141 if (sh < 0) /* tbw something is wrong with indices */
3144 /* don't use 64-bit values for now */
3145 bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
3147 if (agg->frame_count > (64 - sh)) {
3148 IWL_DEBUG_TX_REPLY("more frames than bitmap size");
3152 /* check for success or failure according to the
3153 * transmitted bitmap and block-ack bitmap */
3154 bitmap &= agg->bitmap;
3156 /* For each frame attempted in aggregation,
3157 * update driver's record of tx frame's status. */
3158 for (i = 0; i < agg->frame_count ; i++) {
3159 ack = bitmap & (1 << i);
3161 IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
3162 ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
3163 agg->start_idx + i);
3166 tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
3167 tx_status->flags = IEEE80211_TX_STATUS_ACK;
3168 tx_status->flags |= IEEE80211_TX_STATUS_AMPDU;
3169 tx_status->ampdu_ack_map = successes;
3170 tx_status->ampdu_ack_len = agg->frame_count;
3171 iwl4965_hwrate_to_tx_control(priv, agg->rate_n_flags,
3172 &tx_status->control);
3174 IWL_DEBUG_TX_REPLY("Bitmap %llx\n", (unsigned long long)bitmap);
3180 * iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
3182 static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv,
3185 /* Simply stop the queue, but don't change any configuration;
3186 * the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
3187 iwl_write_prph(priv,
3188 IWL49_SCD_QUEUE_STATUS_BITS(txq_id),
3189 (0 << IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE)|
3190 (1 << IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
3194 * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
3195 * priv->lock must be held by the caller
3197 static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id,
3198 u16 ssn_idx, u8 tx_fifo)
3202 if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
3203 IWL_WARNING("queue number too small: %d, must be > %d\n",
3204 txq_id, IWL_BACK_QUEUE_FIRST_ID);
3208 ret = iwl_grab_nic_access(priv);
3212 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3214 iwl_clear_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3216 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3217 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3218 /* supposes that ssn_idx is valid (!= 0xFFF) */
3219 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3221 iwl_clear_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3222 iwl4965_txq_ctx_deactivate(priv, txq_id);
3223 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
3225 iwl_release_nic_access(priv);
3230 int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id,
3233 struct iwl_queue *q = &priv->txq[txq_id].q;
3234 u8 *addr = priv->stations[sta_id].sta.sta.addr;
3235 struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid];
3237 switch (priv->stations[sta_id].tid[tid].agg.state) {
3238 case IWL_EMPTYING_HW_QUEUE_DELBA:
3239 /* We are reclaiming the last packet of the */
3240 /* aggregated HW queue */
3241 if (txq_id == tid_data->agg.txq_id &&
3242 q->read_ptr == q->write_ptr) {
3243 u16 ssn = SEQ_TO_SN(tid_data->seq_number);
3244 int tx_fifo = default_tid_to_tx_fifo[tid];
3245 IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n");
3246 iwl4965_tx_queue_agg_disable(priv, txq_id,
3248 tid_data->agg.state = IWL_AGG_OFF;
3249 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3252 case IWL_EMPTYING_HW_QUEUE_ADDBA:
3253 /* We are reclaiming the last packet of the queue */
3254 if (tid_data->tfds_in_queue == 0) {
3255 IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n");
3256 tid_data->agg.state = IWL_AGG_ON;
3257 ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid);
3265 * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA
3267 * Handles block-acknowledge notification from device, which reports success
3268 * of frames sent via aggregation.
3270 static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv,
3271 struct iwl_rx_mem_buffer *rxb)
3273 struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
3274 struct iwl4965_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba;
3276 struct iwl_tx_queue *txq = NULL;
3277 struct iwl_ht_agg *agg;
3278 DECLARE_MAC_BUF(mac);
3280 /* "flow" corresponds to Tx queue */
3281 u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
3283 /* "ssn" is start of block-ack Tx window, corresponds to index
3284 * (in Tx queue's circular buffer) of first TFD/frame in window */
3285 u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
3287 if (scd_flow >= priv->hw_params.max_txq_num) {
3288 IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
3292 txq = &priv->txq[scd_flow];
3293 agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
3295 /* Find index just before block-ack window */
3296 index = iwl_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
3298 /* TODO: Need to get this copy more safely - now good for debug */
3300 IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
3303 print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
3305 IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
3306 "%d, scd_ssn = %d\n",
3309 (unsigned long long)le64_to_cpu(ba_resp->bitmap),
3312 IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
3314 (unsigned long long)agg->bitmap);
3316 /* Update driver's record of ACK vs. not for each frame in window */
3317 iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
3319 /* Release all TFDs before the SSN, i.e. all TFDs in front of
3320 * block-ack window (we assume that they've been successfully
3321 * transmitted ... if not, it's too late anyway). */
3322 if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
3323 /* calculate mac80211 ampdu sw queue to wake */
3325 scd_flow - IWL_BACK_QUEUE_FIRST_ID + priv->hw->queues;
3326 int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
3327 priv->stations[ba_resp->sta_id].
3328 tid[ba_resp->tid].tfds_in_queue -= freed;
3329 if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
3330 priv->mac80211_registered &&
3331 agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3332 ieee80211_wake_queue(priv->hw, ampdu_q);
3333 iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
3334 ba_resp->tid, scd_flow);
3339 * iwl4965_tx_queue_set_q2ratid - Map unique receiver/tid combination to a queue
3341 static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid,
3348 scd_q2ratid = ra_tid & IWL49_SCD_QUEUE_RA_TID_MAP_RATID_MSK;
3350 tbl_dw_addr = priv->scd_base_addr +
3351 IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id);
3353 tbl_dw = iwl_read_targ_mem(priv, tbl_dw_addr);
3356 tbl_dw = (scd_q2ratid << 16) | (tbl_dw & 0x0000FFFF);
3358 tbl_dw = scd_q2ratid | (tbl_dw & 0xFFFF0000);
3360 iwl_write_targ_mem(priv, tbl_dw_addr, tbl_dw);
3367 * iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
3369 * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID,
3370 * i.e. it must be one of the higher queues used for aggregation
3372 static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id,
3373 int tx_fifo, int sta_id, int tid,
3376 unsigned long flags;
3380 if (IWL_BACK_QUEUE_FIRST_ID > txq_id)
3381 IWL_WARNING("queue number too small: %d, must be > %d\n",
3382 txq_id, IWL_BACK_QUEUE_FIRST_ID);
3384 ra_tid = BUILD_RAxTID(sta_id, tid);
3386 /* Modify device's station table to Tx this TID */
3387 iwl4965_sta_modify_enable_tid_tx(priv, sta_id, tid);
3389 spin_lock_irqsave(&priv->lock, flags);
3390 rc = iwl_grab_nic_access(priv);
3392 spin_unlock_irqrestore(&priv->lock, flags);
3396 /* Stop this Tx queue before configuring it */
3397 iwl4965_tx_queue_stop_scheduler(priv, txq_id);
3399 /* Map receiver-address / traffic-ID to this queue */
3400 iwl4965_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
3402 /* Set this queue as a chain-building queue */
3403 iwl_set_bits_prph(priv, IWL49_SCD_QUEUECHAIN_SEL, (1 << txq_id));
3405 /* Place first TFD at index corresponding to start sequence number.
3406 * Assumes that ssn_idx is valid (!= 0xFFF) */
3407 priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
3408 priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
3409 iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
3411 /* Set up Tx window size and frame limit for this queue */
3412 iwl_write_targ_mem(priv,
3413 priv->scd_base_addr + IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id),
3414 (SCD_WIN_SIZE << IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS) &
3415 IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK);
3417 iwl_write_targ_mem(priv, priv->scd_base_addr +
3418 IWL49_SCD_CONTEXT_QUEUE_OFFSET(txq_id) + sizeof(u32),
3419 (SCD_FRAME_LIMIT << IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS)
3420 & IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK);
3422 iwl_set_bits_prph(priv, IWL49_SCD_INTERRUPT_MASK, (1 << txq_id));
3424 /* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
3425 iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
3427 iwl_release_nic_access(priv);
3428 spin_unlock_irqrestore(&priv->lock, flags);
3433 #endif /* CONFIG_IWL4965_HT */
3436 #ifdef CONFIG_IWL4965_HT
3437 static int iwl4965_rx_agg_start(struct iwl_priv *priv,
3438 const u8 *addr, int tid, u16 ssn)
3440 unsigned long flags;
3443 sta_id = iwl_find_station(priv, addr);
3444 if (sta_id == IWL_INVALID_STATION)
3447 spin_lock_irqsave(&priv->sta_lock, flags);
3448 priv->stations[sta_id].sta.station_flags_msk = 0;
3449 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
3450 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
3451 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
3452 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3453 spin_unlock_irqrestore(&priv->sta_lock, flags);
3455 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3459 static int iwl4965_rx_agg_stop(struct iwl_priv *priv,
3460 const u8 *addr, int tid)
3462 unsigned long flags;
3465 sta_id = iwl_find_station(priv, addr);
3466 if (sta_id == IWL_INVALID_STATION)
3469 spin_lock_irqsave(&priv->sta_lock, flags);
3470 priv->stations[sta_id].sta.station_flags_msk = 0;
3471 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
3472 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
3473 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3474 spin_unlock_irqrestore(&priv->sta_lock, flags);
3476 return iwl_send_add_sta(priv, &priv->stations[sta_id].sta,
3481 * Find first available (lowest unused) Tx Queue, mark it "active".
3482 * Called only when finding queue for aggregation.
3483 * Should never return anything < 7, because they should already
3484 * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6).
3486 static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv)
3490 for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++)
3491 if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk))
3496 static int iwl4965_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra,
3497 u16 tid, u16 *start_seq_num)
3499 struct iwl_priv *priv = hw->priv;
3505 unsigned long flags;
3506 struct iwl_tid_data *tid_data;
3507 DECLARE_MAC_BUF(mac);
3509 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
3510 tx_fifo = default_tid_to_tx_fifo[tid];
3514 IWL_WARNING("%s on ra = %s tid = %d\n",
3515 __func__, print_mac(mac, ra), tid);
3517 sta_id = iwl_find_station(priv, ra);
3518 if (sta_id == IWL_INVALID_STATION)
3521 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) {
3522 IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n");
3526 txq_id = iwl4965_txq_ctx_activate_free(priv);
3530 spin_lock_irqsave(&priv->sta_lock, flags);
3531 tid_data = &priv->stations[sta_id].tid[tid];
3532 ssn = SEQ_TO_SN(tid_data->seq_number);
3533 tid_data->agg.txq_id = txq_id;
3534 spin_unlock_irqrestore(&priv->sta_lock, flags);
3536 *start_seq_num = ssn;
3537 ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
3543 if (tid_data->tfds_in_queue == 0) {
3544 printk(KERN_ERR "HW queue is empty\n");
3545 tid_data->agg.state = IWL_AGG_ON;
3546 ieee80211_start_tx_ba_cb_irqsafe(hw, ra, tid);
3548 IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n",
3549 tid_data->tfds_in_queue);
3550 tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
3555 static int iwl4965_tx_agg_stop(struct ieee80211_hw *hw, const u8 *ra, u16 tid)
3557 struct iwl_priv *priv = hw->priv;
3558 int tx_fifo_id, txq_id, sta_id, ssn = -1;
3559 struct iwl_tid_data *tid_data;
3560 int ret, write_ptr, read_ptr;
3561 unsigned long flags;
3562 DECLARE_MAC_BUF(mac);
3565 IWL_ERROR("ra = NULL\n");
3569 if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
3570 tx_fifo_id = default_tid_to_tx_fifo[tid];
3574 sta_id = iwl_find_station(priv, ra);
3576 if (sta_id == IWL_INVALID_STATION)
3579 if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON)
3580 IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n");
3582 tid_data = &priv->stations[sta_id].tid[tid];
3583 ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
3584 txq_id = tid_data->agg.txq_id;
3585 write_ptr = priv->txq[txq_id].q.write_ptr;
3586 read_ptr = priv->txq[txq_id].q.read_ptr;
3588 /* The queue is not empty */
3589 if (write_ptr != read_ptr) {
3590 IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n");
3591 priv->stations[sta_id].tid[tid].agg.state =
3592 IWL_EMPTYING_HW_QUEUE_DELBA;
3596 IWL_DEBUG_HT("HW queue is empty\n");
3597 priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
3599 spin_lock_irqsave(&priv->lock, flags);
3600 ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
3601 spin_unlock_irqrestore(&priv->lock, flags);
3606 ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid);
3611 int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
3612 enum ieee80211_ampdu_mlme_action action,
3613 const u8 *addr, u16 tid, u16 *ssn)
3615 struct iwl_priv *priv = hw->priv;
3616 DECLARE_MAC_BUF(mac);
3618 IWL_DEBUG_HT("A-MPDU action on addr %s tid %d\n",
3619 print_mac(mac, addr), tid);
3622 case IEEE80211_AMPDU_RX_START:
3623 IWL_DEBUG_HT("start Rx\n");
3624 return iwl4965_rx_agg_start(priv, addr, tid, *ssn);
3625 case IEEE80211_AMPDU_RX_STOP:
3626 IWL_DEBUG_HT("stop Rx\n");
3627 return iwl4965_rx_agg_stop(priv, addr, tid);
3628 case IEEE80211_AMPDU_TX_START:
3629 IWL_DEBUG_HT("start Tx\n");
3630 return iwl4965_tx_agg_start(hw, addr, tid, ssn);
3631 case IEEE80211_AMPDU_TX_STOP:
3632 IWL_DEBUG_HT("stop Tx\n");
3633 return iwl4965_tx_agg_stop(hw, addr, tid);
3635 IWL_DEBUG_HT("unknown\n");
3641 #endif /* CONFIG_IWL4965_HT */
3644 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
3648 return (u16) sizeof(struct iwl4965_rxon_cmd);
3654 static u16 iwl4965_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
3656 struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
3657 addsta->mode = cmd->mode;
3658 memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
3659 memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
3660 addsta->station_flags = cmd->station_flags;
3661 addsta->station_flags_msk = cmd->station_flags_msk;
3662 addsta->tid_disable_tx = cmd->tid_disable_tx;
3663 addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
3664 addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
3665 addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
3666 addsta->reserved1 = __constant_cpu_to_le16(0);
3667 addsta->reserved2 = __constant_cpu_to_le32(0);
3669 return (u16)sizeof(struct iwl4965_addsta_cmd);
3671 /* Set up 4965-specific Rx frame reply handlers */
3672 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
3674 /* Legacy Rx frames */
3675 priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
3677 /* High-throughput (HT) Rx frames */
3678 priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl4965_rx_reply_rx_phy;
3679 priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl4965_rx_reply_rx;
3681 priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
3682 iwl4965_rx_missed_beacon_notif;
3684 #ifdef CONFIG_IWL4965_HT
3685 priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
3686 #endif /* CONFIG_IWL4965_HT */
3689 void iwl4965_hw_setup_deferred_work(struct iwl_priv *priv)
3691 INIT_WORK(&priv->txpower_work, iwl4965_bg_txpower_work);
3692 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3693 INIT_WORK(&priv->sensitivity_work, iwl4965_bg_sensitivity_work);
3695 init_timer(&priv->statistics_periodic);
3696 priv->statistics_periodic.data = (unsigned long)priv;
3697 priv->statistics_periodic.function = iwl4965_bg_statistics_periodic;
3700 void iwl4965_hw_cancel_deferred_work(struct iwl_priv *priv)
3702 del_timer_sync(&priv->statistics_periodic);
3704 cancel_delayed_work(&priv->init_alive_start);
3708 static struct iwl_hcmd_ops iwl4965_hcmd = {
3709 .rxon_assoc = iwl4965_send_rxon_assoc,
3712 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
3713 .get_hcmd_size = iwl4965_get_hcmd_size,
3714 .enqueue_hcmd = iwl4965_enqueue_hcmd,
3715 .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
3716 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
3717 .chain_noise_reset = iwl4965_chain_noise_reset,
3718 .gain_computation = iwl4965_gain_computation,
3722 static struct iwl_lib_ops iwl4965_lib = {
3723 .set_hw_params = iwl4965_hw_set_hw_params,
3724 .alloc_shared_mem = iwl4965_alloc_shared_mem,
3725 .free_shared_mem = iwl4965_free_shared_mem,
3726 .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx,
3727 .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
3728 .disable_tx_fifo = iwl4965_disable_tx_fifo,
3729 .rx_handler_setup = iwl4965_rx_handler_setup,
3730 .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
3731 .alive_notify = iwl4965_alive_notify,
3732 .init_alive_start = iwl4965_init_alive_start,
3733 .load_ucode = iwl4965_load_bsm,
3735 .init = iwl4965_apm_init,
3736 .config = iwl4965_nic_config,
3737 .set_pwr_src = iwl4965_set_pwr_src,
3740 .regulatory_bands = {
3741 EEPROM_REGULATORY_BAND_1_CHANNELS,
3742 EEPROM_REGULATORY_BAND_2_CHANNELS,
3743 EEPROM_REGULATORY_BAND_3_CHANNELS,
3744 EEPROM_REGULATORY_BAND_4_CHANNELS,
3745 EEPROM_REGULATORY_BAND_5_CHANNELS,
3746 EEPROM_4965_REGULATORY_BAND_24_FAT_CHANNELS,
3747 EEPROM_4965_REGULATORY_BAND_52_FAT_CHANNELS
3749 .verify_signature = iwlcore_eeprom_verify_signature,
3750 .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
3751 .release_semaphore = iwlcore_eeprom_release_semaphore,
3752 .check_version = iwl4965_eeprom_check_version,
3753 .query_addr = iwlcore_eeprom_query_addr,
3755 .radio_kill_sw = iwl4965_radio_kill_sw,
3756 .set_power = iwl4965_set_power,
3757 .update_chain_flags = iwl4965_update_chain_flags,
3760 static struct iwl_ops iwl4965_ops = {
3761 .lib = &iwl4965_lib,
3762 .hcmd = &iwl4965_hcmd,
3763 .utils = &iwl4965_hcmd_utils,
3766 struct iwl_cfg iwl4965_agn_cfg = {
3768 .fw_name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode",
3769 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
3770 .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
3771 .ops = &iwl4965_ops,
3772 .mod_params = &iwl4965_mod_params,
3775 module_param_named(antenna, iwl4965_mod_params.antenna, int, 0444);
3776 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
3777 module_param_named(disable, iwl4965_mod_params.disable, int, 0444);
3778 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
3779 module_param_named(swcrypto, iwl4965_mod_params.sw_crypto, int, 0444);
3780 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])\n");
3781 module_param_named(debug, iwl4965_mod_params.debug, int, 0444);
3782 MODULE_PARM_DESC(debug, "debug output mask");
3784 disable_hw_scan, iwl4965_mod_params.disable_hw_scan, int, 0444);
3785 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
3787 module_param_named(queues_num, iwl4965_mod_params.num_of_queues, int, 0444);
3788 MODULE_PARM_DESC(queues_num, "number of hw queues.");
3791 module_param_named(qos_enable, iwl4965_mod_params.enable_qos, int, 0444);
3792 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
3793 module_param_named(amsdu_size_8K, iwl4965_mod_params.amsdu_size_8K, int, 0444);
3794 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
3795 module_param_named(fw_restart4965, iwl4965_mod_params.restart_fw, int, 0444);
3796 MODULE_PARM_DESC(fw_restart4965, "restart firmware in case of error");